projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
iwlwifi: mvm: take the MAC address from HW registers
[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 - 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 #include "iwl-fw-error-dump.h"
86
87 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
88 MODULE_DESCRIPTION(DRV_DESCRIPTION);
89 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
90 MODULE_LICENSE("GPL");
91
92 static const struct iwl_op_mode_ops iwl_mvm_ops;
93
94 struct iwl_mvm_mod_params iwlmvm_mod_params = {
95 .power_scheme = IWL_POWER_SCHEME_BPS,
96 .tfd_q_hang_detect = true
97 /* rest of fields are 0 by default */
98 };
99
100 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
101 MODULE_PARM_DESC(init_dbg,
102 "set to true to debug an ASSERT in INIT fw (default: false");
103 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
104 MODULE_PARM_DESC(power_scheme,
105 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
106 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
107 bool, S_IRUGO);
108 MODULE_PARM_DESC(tfd_q_hang_detect,
109 "TFD queues hang detection (default: true");
110
111 /*
112 * module init and exit functions
113 */
114 static int __init iwl_mvm_init(void)
115 {
116 int ret;
117
118 ret = iwl_mvm_rate_control_register();
119 if (ret) {
120 pr_err("Unable to register rate control algorithm: %d\n", ret);
121 return ret;
122 }
123
124 ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
125
126 if (ret) {
127 pr_err("Unable to register MVM op_mode: %d\n", ret);
128 iwl_mvm_rate_control_unregister();
129 }
130
131 return ret;
132 }
133 module_init(iwl_mvm_init);
134
135 static void __exit iwl_mvm_exit(void)
136 {
137 iwl_opmode_deregister("iwlmvm");
138 iwl_mvm_rate_control_unregister();
139 }
140 module_exit(iwl_mvm_exit);
141
142 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
143 {
144 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
145 u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
146 u32 reg_val = 0;
147 u32 phy_config = iwl_mvm_get_phy_config(mvm);
148
149 radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
150 FW_PHY_CFG_RADIO_TYPE_POS;
151 radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
152 FW_PHY_CFG_RADIO_STEP_POS;
153 radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
154 FW_PHY_CFG_RADIO_DASH_POS;
155
156 /* SKU control */
157 reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
158 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
159 reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
160 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
161
162 /* radio configuration */
163 reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
164 reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
165 reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
166
167 WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
168 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
169
170 /*
171 * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
172 * shouldn't be set to any non-zero value. The same is supposed to be
173 * true of the other HW, but unsetting them (such as the 7260) causes
174 * automatic tests to fail on seemingly unrelated errors. Need to
175 * further investigate this, but for now we'll separate cases.
176 */
177 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
178 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
179
180 iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
181 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
182 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
183 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
184 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
185 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
186 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
187 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
188 reg_val);
189
190 IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
191 radio_cfg_step, radio_cfg_dash);
192
193 /*
194 * W/A : NIC is stuck in a reset state after Early PCIe power off
195 * (PCIe power is lost before PERST# is asserted), causing ME FW
196 * to lose ownership and not being able to obtain it back.
197 */
198 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
199 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
200 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
201 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
202 }
203
204 struct iwl_rx_handlers {
205 u8 cmd_id;
206 bool async;
207 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
208 struct iwl_device_cmd *cmd);
209 };
210
211 #define RX_HANDLER(_cmd_id, _fn, _async) \
212 { .cmd_id = _cmd_id , .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_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
226 RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
227 RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
228 RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
229
230 RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
231 RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
232 RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
233 RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
234 iwl_mvm_rx_ant_coupling_notif, true),
235
236 RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
237 RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
238
239 RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
240
241 RX_HANDLER(SCAN_ITERATION_COMPLETE,
242 iwl_mvm_rx_scan_offload_iter_complete_notif, false),
243 RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
244 iwl_mvm_rx_scan_offload_complete_notif, true),
245 RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
246 false),
247 RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
248 true),
249
250 RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
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(RADIO_VERSION_NOTIFICATION),
285 CMD(SCAN_REQUEST_CMD),
286 CMD(SCAN_ABORT_CMD),
287 CMD(SCAN_START_NOTIFICATION),
288 CMD(SCAN_RESULTS_NOTIFICATION),
289 CMD(SCAN_COMPLETE_NOTIFICATION),
290 CMD(NVM_ACCESS_CMD),
291 CMD(PHY_CONFIGURATION_CMD),
292 CMD(CALIB_RES_NOTIF_PHY_DB),
293 CMD(SET_CALIB_DEFAULT_CMD),
294 CMD(CALIBRATION_COMPLETE_NOTIFICATION),
295 CMD(ADD_STA_KEY),
296 CMD(ADD_STA),
297 CMD(REMOVE_STA),
298 CMD(LQ_CMD),
299 CMD(SCAN_OFFLOAD_CONFIG_CMD),
300 CMD(MATCH_FOUND_NOTIFICATION),
301 CMD(SCAN_OFFLOAD_REQUEST_CMD),
302 CMD(SCAN_OFFLOAD_ABORT_CMD),
303 CMD(HOT_SPOT_CMD),
304 CMD(SCAN_OFFLOAD_COMPLETE),
305 CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
306 CMD(SCAN_ITERATION_COMPLETE),
307 CMD(POWER_TABLE_CMD),
308 CMD(WEP_KEY),
309 CMD(REPLY_RX_PHY_CMD),
310 CMD(REPLY_RX_MPDU_CMD),
311 CMD(BEACON_NOTIFICATION),
312 CMD(BEACON_TEMPLATE_CMD),
313 CMD(STATISTICS_CMD),
314 CMD(STATISTICS_NOTIFICATION),
315 CMD(EOSP_NOTIFICATION),
316 CMD(REDUCE_TX_POWER_CMD),
317 CMD(TX_ANT_CONFIGURATION_CMD),
318 CMD(D3_CONFIG_CMD),
319 CMD(D0I3_END_CMD),
320 CMD(PROT_OFFLOAD_CONFIG_CMD),
321 CMD(OFFLOADS_QUERY_CMD),
322 CMD(REMOTE_WAKE_CONFIG_CMD),
323 CMD(WOWLAN_PATTERNS),
324 CMD(WOWLAN_CONFIGURATION),
325 CMD(WOWLAN_TSC_RSC_PARAM),
326 CMD(WOWLAN_TKIP_PARAM),
327 CMD(WOWLAN_KEK_KCK_MATERIAL),
328 CMD(WOWLAN_GET_STATUSES),
329 CMD(WOWLAN_TX_POWER_PER_DB),
330 CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
331 CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
332 CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
333 CMD(CARD_STATE_NOTIFICATION),
334 CMD(MISSED_BEACONS_NOTIFICATION),
335 CMD(BT_COEX_PRIO_TABLE),
336 CMD(BT_COEX_PROT_ENV),
337 CMD(BT_PROFILE_NOTIFICATION),
338 CMD(BT_CONFIG),
339 CMD(MCAST_FILTER_CMD),
340 CMD(BCAST_FILTER_CMD),
341 CMD(REPLY_SF_CFG_CMD),
342 CMD(REPLY_BEACON_FILTERING_CMD),
343 CMD(CMD_DTS_MEASUREMENT_TRIGGER),
344 CMD(DTS_MEASUREMENT_NOTIFICATION),
345 CMD(REPLY_THERMAL_MNG_BACKOFF),
346 CMD(MAC_PM_POWER_TABLE),
347 CMD(LTR_CONFIG),
348 CMD(BT_COEX_CI),
349 CMD(BT_COEX_UPDATE_SW_BOOST),
350 CMD(BT_COEX_UPDATE_CORUN_LUT),
351 CMD(BT_COEX_UPDATE_REDUCED_TXP),
352 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
353 CMD(ANTENNA_COUPLING_NOTIFICATION),
354 CMD(SCD_QUEUE_CFG),
355 CMD(SCAN_CFG_CMD),
356 CMD(SCAN_REQ_UMAC),
357 CMD(SCAN_ABORT_UMAC),
358 CMD(SCAN_COMPLETE_UMAC),
359 CMD(TDLS_CHANNEL_SWITCH_CMD),
360 CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
361 CMD(TDLS_CONFIG_CMD),
362 CMD(MCC_UPDATE_CMD),
363 };
364 #undef CMD
365
366 /* this forward declaration can avoid to export the function */
367 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
368 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
369
370 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
371 {
372 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
373
374 if (!pwr_tx_backoff)
375 return 0;
376
377 while (pwr_tx_backoff->pwr) {
378 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
379 return pwr_tx_backoff->backoff;
380
381 pwr_tx_backoff++;
382 }
383
384 return 0;
385 }
386
387 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
388
389 static struct iwl_op_mode *
390 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
391 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
392 {
393 struct ieee80211_hw *hw;
394 struct iwl_op_mode *op_mode;
395 struct iwl_mvm *mvm;
396 struct iwl_trans_config trans_cfg = {};
397 static const u8 no_reclaim_cmds[] = {
398 TX_CMD,
399 };
400 int err, scan_size;
401 u32 min_backoff;
402
403 /*
404 * We use IWL_MVM_STATION_COUNT to check the validity of the station
405 * index all over the driver - check that its value corresponds to the
406 * array size.
407 */
408 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
409
410 /********************************
411 * 1. Allocating and configuring HW data
412 ********************************/
413 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
414 sizeof(struct iwl_mvm),
415 &iwl_mvm_hw_ops);
416 if (!hw)
417 return NULL;
418
419 if (cfg->max_rx_agg_size)
420 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
421
422 if (cfg->max_tx_agg_size)
423 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
424
425 op_mode = hw->priv;
426 op_mode->ops = &iwl_mvm_ops;
427
428 mvm = IWL_OP_MODE_GET_MVM(op_mode);
429 mvm->dev = trans->dev;
430 mvm->trans = trans;
431 mvm->cfg = cfg;
432 mvm->fw = fw;
433 mvm->hw = hw;
434
435 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
436
437 mvm->aux_queue = 15;
438 mvm->first_agg_queue = 16;
439 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
440 if (mvm->cfg->base_params->num_of_queues == 16) {
441 mvm->aux_queue = 11;
442 mvm->first_agg_queue = 12;
443 }
444 mvm->sf_state = SF_UNINIT;
445 mvm->low_latency_agg_frame_limit = 6;
446 mvm->cur_ucode = IWL_UCODE_INIT;
447
448 mutex_init(&mvm->mutex);
449 mutex_init(&mvm->d0i3_suspend_mutex);
450 spin_lock_init(&mvm->async_handlers_lock);
451 INIT_LIST_HEAD(&mvm->time_event_list);
452 INIT_LIST_HEAD(&mvm->aux_roc_te_list);
453 INIT_LIST_HEAD(&mvm->async_handlers_list);
454 spin_lock_init(&mvm->time_event_lock);
455
456 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
457 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
458 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
459 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
460 INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
461 INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
462
463 spin_lock_init(&mvm->d0i3_tx_lock);
464 spin_lock_init(&mvm->refs_lock);
465 skb_queue_head_init(&mvm->d0i3_tx);
466 init_waitqueue_head(&mvm->d0i3_exit_waitq);
467
468 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
469
470 /*
471 * Populate the state variables that the transport layer needs
472 * to know about.
473 */
474 trans_cfg.op_mode = op_mode;
475 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
476 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
477 trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
478
479 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
480 trans_cfg.bc_table_dword = true;
481
482 trans_cfg.command_names = iwl_mvm_cmd_strings;
483
484 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
485 trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
486 trans_cfg.scd_set_active = true;
487
488 trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
489
490 /* Set a short watchdog for the command queue */
491 trans_cfg.cmd_q_wdg_timeout =
492 iwlmvm_mod_params.tfd_q_hang_detect ? IWL_DEF_WD_TIMEOUT :
493 IWL_WATCHDOG_DISABLED;
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 /* set the nvm_file_name according to priority */
526 if (iwlwifi_mod_params.nvm_file) {
527 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
528 } else {
529 if ((trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) &&
530 (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP))
531 mvm->nvm_file_name = mvm->cfg->default_nvm_file_8000A;
532 else
533 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
534 }
535
536 if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
537 "not allowing power-up and not having nvm_file\n"))
538 goto out_free;
539
540 /*
541 * Even if nvm exists in the nvm_file driver should read again the nvm
542 * from the nic because there might be entries that exist in the OTP
543 * and not in the file.
544 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
545 */
546 if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
547 err = iwl_nvm_init(mvm, false);
548 if (err)
549 goto out_free;
550 } else {
551 err = iwl_trans_start_hw(mvm->trans);
552 if (err)
553 goto out_free;
554
555 mutex_lock(&mvm->mutex);
556 err = iwl_run_init_mvm_ucode(mvm, true);
557 if (!err || !iwlmvm_mod_params.init_dbg)
558 iwl_trans_stop_device(trans);
559 mutex_unlock(&mvm->mutex);
560 /* returns 0 if successful, 1 if success but in rfkill */
561 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
562 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
563 goto out_free;
564 }
565 }
566
567 scan_size = iwl_mvm_scan_size(mvm);
568
569 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
570 if (!mvm->scan_cmd)
571 goto out_free;
572
573 /* Set EBS as successful as long as not stated otherwise by the FW. */
574 mvm->last_ebs_successful = true;
575
576 err = iwl_mvm_mac_setup_register(mvm);
577 if (err)
578 goto out_free;
579
580 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
581 if (err)
582 goto out_unregister;
583
584 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
585
586 /* rpm starts with a taken ref. only set the appropriate bit here. */
587 mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
588
589 return op_mode;
590
591 out_unregister:
592 ieee80211_unregister_hw(mvm->hw);
593 iwl_mvm_leds_exit(mvm);
594 out_free:
595 iwl_phy_db_free(mvm->phy_db);
596 kfree(mvm->scan_cmd);
597 if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
598 iwl_trans_op_mode_leave(trans);
599 ieee80211_free_hw(mvm->hw);
600 return NULL;
601 }
602
603 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
604 {
605 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
606 int i;
607
608 iwl_mvm_leds_exit(mvm);
609
610 iwl_mvm_tt_exit(mvm);
611
612 ieee80211_unregister_hw(mvm->hw);
613
614 kfree(mvm->scan_cmd);
615 kfree(mvm->mcast_filter_cmd);
616 mvm->mcast_filter_cmd = NULL;
617
618 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
619 kfree(mvm->d3_resume_sram);
620 if (mvm->nd_config) {
621 kfree(mvm->nd_config->match_sets);
622 kfree(mvm->nd_config);
623 mvm->nd_config = NULL;
624 }
625 #endif
626
627 iwl_trans_op_mode_leave(mvm->trans);
628
629 iwl_phy_db_free(mvm->phy_db);
630 mvm->phy_db = NULL;
631
632 iwl_free_nvm_data(mvm->nvm_data);
633 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
634 kfree(mvm->nvm_sections[i].data);
635
636 ieee80211_free_hw(mvm->hw);
637 }
638
639 struct iwl_async_handler_entry {
640 struct list_head list;
641 struct iwl_rx_cmd_buffer rxb;
642 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
643 struct iwl_device_cmd *cmd);
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 if (entry->fn(mvm, &entry->rxb, NULL))
681 IWL_WARN(mvm,
682 "returned value from ASYNC handlers are ignored\n");
683 iwl_free_rxb(&entry->rxb);
684 list_del(&entry->list);
685 kfree(entry);
686 }
687 mutex_unlock(&mvm->mutex);
688 }
689
690 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
691 struct iwl_rx_packet *pkt)
692 {
693 struct iwl_fw_dbg_trigger_tlv *trig;
694 struct iwl_fw_dbg_trigger_cmd *cmds_trig;
695 char buf[32];
696 int i;
697
698 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
699 return;
700
701 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
702 cmds_trig = (void *)trig->data;
703
704 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
705 return;
706
707 for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
708 /* don't collect on CMD 0 */
709 if (!cmds_trig->cmds[i].cmd_id)
710 break;
711
712 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
713 continue;
714
715 memset(buf, 0, sizeof(buf));
716 snprintf(buf, sizeof(buf), "CMD 0x%02x received", pkt->hdr.cmd);
717 iwl_mvm_fw_dbg_collect_trig(mvm, trig, buf, sizeof(buf));
718 break;
719 }
720 }
721
722 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
723 struct iwl_rx_cmd_buffer *rxb,
724 struct iwl_device_cmd *cmd)
725 {
726 struct iwl_rx_packet *pkt = rxb_addr(rxb);
727 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
728 u8 i;
729
730 iwl_mvm_rx_check_trigger(mvm, pkt);
731
732 /*
733 * Do the notification wait before RX handlers so
734 * even if the RX handler consumes the RXB we have
735 * access to it in the notification wait entry.
736 */
737 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
738
739 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
740 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
741 struct iwl_async_handler_entry *entry;
742
743 if (rx_h->cmd_id != pkt->hdr.cmd)
744 continue;
745
746 if (!rx_h->async)
747 return rx_h->fn(mvm, rxb, cmd);
748
749 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
750 /* we can't do much... */
751 if (!entry)
752 return 0;
753
754 entry->rxb._page = rxb_steal_page(rxb);
755 entry->rxb._offset = rxb->_offset;
756 entry->rxb._rx_page_order = rxb->_rx_page_order;
757 entry->fn = rx_h->fn;
758 spin_lock(&mvm->async_handlers_lock);
759 list_add_tail(&entry->list, &mvm->async_handlers_list);
760 spin_unlock(&mvm->async_handlers_lock);
761 schedule_work(&mvm->async_handlers_wk);
762 break;
763 }
764
765 return 0;
766 }
767
768 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
769 {
770 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
771 int mq = mvm->queue_to_mac80211[queue];
772
773 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
774 return;
775
776 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
777 IWL_DEBUG_TX_QUEUES(mvm,
778 "queue %d (mac80211 %d) already stopped\n",
779 queue, mq);
780 return;
781 }
782
783 ieee80211_stop_queue(mvm->hw, mq);
784 }
785
786 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
787 {
788 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
789 int mq = mvm->queue_to_mac80211[queue];
790
791 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
792 return;
793
794 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
795 IWL_DEBUG_TX_QUEUES(mvm,
796 "queue %d (mac80211 %d) still stopped\n",
797 queue, mq);
798 return;
799 }
800
801 ieee80211_wake_queue(mvm->hw, mq);
802 }
803
804 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
805 {
806 if (state)
807 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
808 else
809 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
810
811 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
812 }
813
814 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
815 {
816 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
817 bool calibrating = ACCESS_ONCE(mvm->calibrating);
818
819 if (state)
820 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
821 else
822 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
823
824 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
825
826 /* iwl_run_init_mvm_ucode is waiting for results, abort it */
827 if (calibrating)
828 iwl_abort_notification_waits(&mvm->notif_wait);
829
830 /*
831 * Stop the device if we run OPERATIONAL firmware or if we are in the
832 * middle of the calibrations.
833 */
834 return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
835 }
836
837 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
838 {
839 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
840 struct ieee80211_tx_info *info;
841
842 info = IEEE80211_SKB_CB(skb);
843 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
844 ieee80211_free_txskb(mvm->hw, skb);
845 }
846
847 struct iwl_mvm_reprobe {
848 struct device *dev;
849 struct work_struct work;
850 };
851
852 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
853 {
854 struct iwl_mvm_reprobe *reprobe;
855
856 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
857 if (device_reprobe(reprobe->dev))
858 dev_err(reprobe->dev, "reprobe failed!\n");
859 kfree(reprobe);
860 module_put(THIS_MODULE);
861 }
862
863 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
864 {
865 struct iwl_mvm *mvm =
866 container_of(work, struct iwl_mvm, fw_dump_wk.work);
867
868 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
869 return;
870
871 mutex_lock(&mvm->mutex);
872 iwl_mvm_fw_error_dump(mvm);
873
874 /* start recording again if the firmware is not crashed */
875 WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
876 mvm->fw->dbg_dest_tlv &&
877 iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
878
879 mutex_unlock(&mvm->mutex);
880
881 iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
882 }
883
884 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
885 {
886 iwl_abort_notification_waits(&mvm->notif_wait);
887
888 /*
889 * This is a bit racy, but worst case we tell mac80211 about
890 * a stopped/aborted scan when that was already done which
891 * is not a problem. It is necessary to abort any os scan
892 * here because mac80211 requires having the scan cleared
893 * before restarting.
894 * We'll reset the scan_status to NONE in restart cleanup in
895 * the next start() call from mac80211. If restart isn't called
896 * (no fw restart) scan status will stay busy.
897 */
898 switch (mvm->scan_status) {
899 case IWL_MVM_SCAN_NONE:
900 break;
901 case IWL_MVM_SCAN_OS:
902 ieee80211_scan_completed(mvm->hw, true);
903 break;
904 case IWL_MVM_SCAN_SCHED:
905 /* Sched scan will be restarted by mac80211 in restart_hw. */
906 if (!mvm->restart_fw)
907 ieee80211_sched_scan_stopped(mvm->hw);
908 break;
909 }
910
911 /*
912 * If we're restarting already, don't cycle restarts.
913 * If INIT fw asserted, it will likely fail again.
914 * If WoWLAN fw asserted, don't restart either, mac80211
915 * can't recover this since we're already half suspended.
916 */
917 if (!mvm->restart_fw && fw_error) {
918 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
919 } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
920 &mvm->status)) {
921 struct iwl_mvm_reprobe *reprobe;
922
923 IWL_ERR(mvm,
924 "Firmware error during reconfiguration - reprobe!\n");
925
926 /*
927 * get a module reference to avoid doing this while unloading
928 * anyway and to avoid scheduling a work with code that's
929 * being removed.
930 */
931 if (!try_module_get(THIS_MODULE)) {
932 IWL_ERR(mvm, "Module is being unloaded - abort\n");
933 return;
934 }
935
936 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
937 if (!reprobe) {
938 module_put(THIS_MODULE);
939 return;
940 }
941 reprobe->dev = mvm->trans->dev;
942 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
943 schedule_work(&reprobe->work);
944 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
945 /* don't let the transport/FW power down */
946 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
947
948 if (fw_error && mvm->restart_fw > 0)
949 mvm->restart_fw--;
950 ieee80211_restart_hw(mvm->hw);
951 }
952 }
953
954 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
955 {
956 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
957
958 iwl_mvm_dump_nic_error_log(mvm);
959
960 iwl_mvm_nic_restart(mvm, true);
961 }
962
963 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
964 {
965 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
966
967 WARN_ON(1);
968 iwl_mvm_nic_restart(mvm, true);
969 }
970
971 struct iwl_d0i3_iter_data {
972 struct iwl_mvm *mvm;
973 u8 ap_sta_id;
974 u8 vif_count;
975 u8 offloading_tid;
976 bool disable_offloading;
977 };
978
979 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
980 struct ieee80211_vif *vif,
981 struct iwl_d0i3_iter_data *iter_data)
982 {
983 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
984 struct ieee80211_sta *ap_sta;
985 struct iwl_mvm_sta *mvmsta;
986 u32 available_tids = 0;
987 u8 tid;
988
989 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
990 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
991 return false;
992
993 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
994 if (IS_ERR_OR_NULL(ap_sta))
995 return false;
996
997 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
998 spin_lock_bh(&mvmsta->lock);
999 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1000 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1001
1002 /*
1003 * in case of pending tx packets, don't use this tid
1004 * for offloading in order to prevent reuse of the same
1005 * qos seq counters.
1006 */
1007 if (iwl_mvm_tid_queued(tid_data))
1008 continue;
1009
1010 if (tid_data->state != IWL_AGG_OFF)
1011 continue;
1012
1013 available_tids |= BIT(tid);
1014 }
1015 spin_unlock_bh(&mvmsta->lock);
1016
1017 /*
1018 * disallow protocol offloading if we have no available tid
1019 * (with no pending frames and no active aggregation,
1020 * as we don't handle "holes" properly - the scheduler needs the
1021 * frame's seq number and TFD index to match)
1022 */
1023 if (!available_tids)
1024 return true;
1025
1026 /* for simplicity, just use the first available tid */
1027 iter_data->offloading_tid = ffs(available_tids) - 1;
1028 return false;
1029 }
1030
1031 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1032 struct ieee80211_vif *vif)
1033 {
1034 struct iwl_d0i3_iter_data *data = _data;
1035 struct iwl_mvm *mvm = data->mvm;
1036 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1037 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1038
1039 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1040 if (vif->type != NL80211_IFTYPE_STATION ||
1041 !vif->bss_conf.assoc)
1042 return;
1043
1044 /*
1045 * in case of pending tx packets or active aggregations,
1046 * avoid offloading features in order to prevent reuse of
1047 * the same qos seq counters.
1048 */
1049 if (iwl_mvm_disallow_offloading(mvm, vif, data))
1050 data->disable_offloading = true;
1051
1052 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1053 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1054
1055 /*
1056 * on init/association, mvm already configures POWER_TABLE_CMD
1057 * and REPLY_MCAST_FILTER_CMD, so currently don't
1058 * reconfigure them (we might want to use different
1059 * params later on, though).
1060 */
1061 data->ap_sta_id = mvmvif->ap_sta_id;
1062 data->vif_count++;
1063 }
1064
1065 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1066 struct iwl_wowlan_config_cmd *cmd,
1067 struct iwl_d0i3_iter_data *iter_data)
1068 {
1069 struct ieee80211_sta *ap_sta;
1070 struct iwl_mvm_sta *mvm_ap_sta;
1071
1072 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1073 return;
1074
1075 rcu_read_lock();
1076
1077 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1078 if (IS_ERR_OR_NULL(ap_sta))
1079 goto out;
1080
1081 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1082 cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1083 cmd->offloading_tid = iter_data->offloading_tid;
1084
1085 /*
1086 * The d0i3 uCode takes care of the nonqos counters,
1087 * so configure only the qos seq ones.
1088 */
1089 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1090 out:
1091 rcu_read_unlock();
1092 }
1093
1094 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1095 {
1096 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1097 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1098 int ret;
1099 struct iwl_d0i3_iter_data d0i3_iter_data = {
1100 .mvm = mvm,
1101 };
1102 struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1103 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1104 IWL_WOWLAN_WAKEUP_BEACON_MISS |
1105 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1106 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1107 };
1108 struct iwl_d3_manager_config d3_cfg_cmd = {
1109 .min_sleep_time = cpu_to_le32(1000),
1110 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1111 };
1112
1113 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1114
1115 /* make sure we have no running tx while configuring the qos */
1116 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1117 synchronize_net();
1118
1119 /*
1120 * iwl_mvm_ref_sync takes a reference before checking the flag.
1121 * so by checking there is no held reference we prevent a state
1122 * in which iwl_mvm_ref_sync continues successfully while we
1123 * configure the firmware to enter d0i3
1124 */
1125 if (iwl_mvm_ref_taken(mvm)) {
1126 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1127 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1128 wake_up(&mvm->d0i3_exit_waitq);
1129 return 1;
1130 }
1131
1132 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1133 IEEE80211_IFACE_ITER_NORMAL,
1134 iwl_mvm_enter_d0i3_iterator,
1135 &d0i3_iter_data);
1136 if (d0i3_iter_data.vif_count == 1) {
1137 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1138 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1139 } else {
1140 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1141 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1142 mvm->d0i3_offloading = false;
1143 }
1144
1145 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1146 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1147 sizeof(wowlan_config_cmd),
1148 &wowlan_config_cmd);
1149 if (ret)
1150 return ret;
1151
1152 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1153 flags | CMD_MAKE_TRANS_IDLE,
1154 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1155 }
1156
1157 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1158 struct ieee80211_vif *vif)
1159 {
1160 struct iwl_mvm *mvm = _data;
1161 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1162
1163 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1164 if (vif->type != NL80211_IFTYPE_STATION ||
1165 !vif->bss_conf.assoc)
1166 return;
1167
1168 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1169 }
1170
1171 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1172 struct ieee80211_vif *vif)
1173 {
1174 struct iwl_mvm *mvm = data;
1175 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1176
1177 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1178 mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1179 ieee80211_connection_loss(vif);
1180 }
1181
1182 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1183 {
1184 struct ieee80211_sta *sta = NULL;
1185 struct iwl_mvm_sta *mvm_ap_sta;
1186 int i;
1187 bool wake_queues = false;
1188
1189 lockdep_assert_held(&mvm->mutex);
1190
1191 spin_lock_bh(&mvm->d0i3_tx_lock);
1192
1193 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1194 goto out;
1195
1196 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1197
1198 /* get the sta in order to update seq numbers and re-enqueue skbs */
1199 sta = rcu_dereference_protected(
1200 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1201 lockdep_is_held(&mvm->mutex));
1202
1203 if (IS_ERR_OR_NULL(sta)) {
1204 sta = NULL;
1205 goto out;
1206 }
1207
1208 if (mvm->d0i3_offloading && qos_seq) {
1209 /* update qos seq numbers if offloading was enabled */
1210 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1211 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1212 u16 seq = le16_to_cpu(qos_seq[i]);
1213 /* firmware stores last-used one, we store next one */
1214 seq += 0x10;
1215 mvm_ap_sta->tid_data[i].seq_number = seq;
1216 }
1217 }
1218 out:
1219 /* re-enqueue (or drop) all packets */
1220 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1221 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1222
1223 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1224 ieee80211_free_txskb(mvm->hw, skb);
1225
1226 /* if the skb_queue is not empty, we need to wake queues */
1227 wake_queues = true;
1228 }
1229 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1230 wake_up(&mvm->d0i3_exit_waitq);
1231 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1232 if (wake_queues)
1233 ieee80211_wake_queues(mvm->hw);
1234
1235 spin_unlock_bh(&mvm->d0i3_tx_lock);
1236 }
1237
1238 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1239 {
1240 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1241 struct iwl_host_cmd get_status_cmd = {
1242 .id = WOWLAN_GET_STATUSES,
1243 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1244 };
1245 struct iwl_wowlan_status *status;
1246 int ret;
1247 u32 disconnection_reasons, wakeup_reasons;
1248 __le16 *qos_seq = NULL;
1249
1250 mutex_lock(&mvm->mutex);
1251 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1252 if (ret)
1253 goto out;
1254
1255 if (!get_status_cmd.resp_pkt)
1256 goto out;
1257
1258 status = (void *)get_status_cmd.resp_pkt->data;
1259 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1260 qos_seq = status->qos_seq_ctr;
1261
1262 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1263
1264 disconnection_reasons =
1265 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1266 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1267 if (wakeup_reasons & disconnection_reasons)
1268 ieee80211_iterate_active_interfaces(
1269 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1270 iwl_mvm_d0i3_disconnect_iter, mvm);
1271
1272 iwl_free_resp(&get_status_cmd);
1273 out:
1274 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1275 iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1276 mutex_unlock(&mvm->mutex);
1277 }
1278
1279 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1280 {
1281 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1282 CMD_WAKE_UP_TRANS;
1283 int ret;
1284
1285 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1286
1287 mutex_lock(&mvm->d0i3_suspend_mutex);
1288 if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1289 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1290 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1291 mutex_unlock(&mvm->d0i3_suspend_mutex);
1292 return 0;
1293 }
1294 mutex_unlock(&mvm->d0i3_suspend_mutex);
1295
1296 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1297 if (ret)
1298 goto out;
1299
1300 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1301 IEEE80211_IFACE_ITER_NORMAL,
1302 iwl_mvm_exit_d0i3_iterator,
1303 mvm);
1304 out:
1305 schedule_work(&mvm->d0i3_exit_work);
1306 return ret;
1307 }
1308
1309 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1310 {
1311 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1312
1313 iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1314 return _iwl_mvm_exit_d0i3(mvm);
1315 }
1316
1317 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1318 struct napi_struct *napi,
1319 struct net_device *napi_dev,
1320 int (*poll)(struct napi_struct *, int),
1321 int weight)
1322 {
1323 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1324
1325 ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1326 }
1327
1328 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1329 .start = iwl_op_mode_mvm_start,
1330 .stop = iwl_op_mode_mvm_stop,
1331 .rx = iwl_mvm_rx_dispatch,
1332 .queue_full = iwl_mvm_stop_sw_queue,
1333 .queue_not_full = iwl_mvm_wake_sw_queue,
1334 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1335 .free_skb = iwl_mvm_free_skb,
1336 .nic_error = iwl_mvm_nic_error,
1337 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1338 .nic_config = iwl_mvm_nic_config,
1339 .enter_d0i3 = iwl_mvm_enter_d0i3,
1340 .exit_d0i3 = iwl_mvm_exit_d0i3,
1341 .napi_add = iwl_mvm_napi_add,
1342 };
Linux kernel - Deliverables
This page took 0.059874 seconds and 5 git commands to generate.