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[deliverable/linux.git] / drivers / net / wireless / intel / 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 <linuxwifi@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 #include "fw-dbg.h"
86 #include "fw-api.h"
87 #include "fw-api-scan.h"
88
89 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
90 MODULE_DESCRIPTION(DRV_DESCRIPTION);
91 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
92 MODULE_LICENSE("GPL");
93
94 static const struct iwl_op_mode_ops iwl_mvm_ops;
95 static const struct iwl_op_mode_ops iwl_mvm_ops_mq;
96
97 struct iwl_mvm_mod_params iwlmvm_mod_params = {
98 .power_scheme = IWL_POWER_SCHEME_BPS,
99 .tfd_q_hang_detect = true
100 /* rest of fields are 0 by default */
101 };
102
103 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
104 MODULE_PARM_DESC(init_dbg,
105 "set to true to debug an ASSERT in INIT fw (default: false");
106 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
107 MODULE_PARM_DESC(power_scheme,
108 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
109 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
110 bool, S_IRUGO);
111 MODULE_PARM_DESC(tfd_q_hang_detect,
112 "TFD queues hang detection (default: true");
113
114 /*
115 * module init and exit functions
116 */
117 static int __init iwl_mvm_init(void)
118 {
119 int ret;
120
121 ret = iwl_mvm_rate_control_register();
122 if (ret) {
123 pr_err("Unable to register rate control algorithm: %d\n", ret);
124 return ret;
125 }
126
127 ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
128
129 if (ret) {
130 pr_err("Unable to register MVM op_mode: %d\n", ret);
131 iwl_mvm_rate_control_unregister();
132 }
133
134 return ret;
135 }
136 module_init(iwl_mvm_init);
137
138 static void __exit iwl_mvm_exit(void)
139 {
140 iwl_opmode_deregister("iwlmvm");
141 iwl_mvm_rate_control_unregister();
142 }
143 module_exit(iwl_mvm_exit);
144
145 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
146 {
147 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
148 u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
149 u32 reg_val = 0;
150 u32 phy_config = iwl_mvm_get_phy_config(mvm);
151
152 radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
153 FW_PHY_CFG_RADIO_TYPE_POS;
154 radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
155 FW_PHY_CFG_RADIO_STEP_POS;
156 radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
157 FW_PHY_CFG_RADIO_DASH_POS;
158
159 /* SKU control */
160 reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
161 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
162 reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
163 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
164
165 /* radio configuration */
166 reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
167 reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
168 reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
169
170 WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
171 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
172
173 /*
174 * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
175 * shouldn't be set to any non-zero value. The same is supposed to be
176 * true of the other HW, but unsetting them (such as the 7260) causes
177 * automatic tests to fail on seemingly unrelated errors. Need to
178 * further investigate this, but for now we'll separate cases.
179 */
180 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
181 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
182
183 iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
184 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
185 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
186 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
187 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
188 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
189 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
190 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
191 reg_val);
192
193 IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
194 radio_cfg_step, radio_cfg_dash);
195
196 /*
197 * W/A : NIC is stuck in a reset state after Early PCIe power off
198 * (PCIe power is lost before PERST# is asserted), causing ME FW
199 * to lose ownership and not being able to obtain it back.
200 */
201 if (!mvm->trans->cfg->apmg_not_supported)
202 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
203 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
204 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
205 }
206
207 struct iwl_rx_handlers {
208 u16 cmd_id;
209 bool async;
210 void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
211 };
212
213 #define RX_HANDLER(_cmd_id, _fn, _async) \
214 { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
215 #define RX_HANDLER_GRP(_grp, _cmd, _fn, _async) \
216 { .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
217
218 /*
219 * Handlers for fw notifications
220 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
221 * This list should be in order of frequency for performance purposes.
222 *
223 * The handler can be SYNC - this means that it will be called in the Rx path
224 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
225 * only in this case!), it should be set as ASYNC. In that case, it will be
226 * called from a worker with mvm->mutex held.
227 */
228 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
229 RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
230 RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
231
232 RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
233 RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
234 RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
235 RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
236 iwl_mvm_rx_ant_coupling_notif, true),
237
238 RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
239 RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
240
241 RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
242
243 RX_HANDLER(SCAN_ITERATION_COMPLETE,
244 iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
245 RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
246 iwl_mvm_rx_lmac_scan_complete_notif, true),
247 RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
248 false),
249 RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
250 true),
251 RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
252 iwl_mvm_rx_umac_scan_iter_complete_notif, false),
253
254 RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
255
256 RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
257 false),
258
259 RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
260 RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
261 iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
262 RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
263 RX_HANDLER_GRP(PHY_OPS_GROUP, DTS_MEASUREMENT_NOTIF_WIDE,
264 iwl_mvm_temp_notif, true),
265
266 RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
267 true),
268 RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
269 RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
270
271 };
272 #undef RX_HANDLER
273 #undef RX_HANDLER_GRP
274
275 /* Please keep this array *SORTED* by hex value.
276 * Access is done through binary search
277 */
278 static const struct iwl_hcmd_names iwl_mvm_legacy_names[] = {
279 HCMD_NAME(MVM_ALIVE),
280 HCMD_NAME(REPLY_ERROR),
281 HCMD_NAME(ECHO_CMD),
282 HCMD_NAME(INIT_COMPLETE_NOTIF),
283 HCMD_NAME(PHY_CONTEXT_CMD),
284 HCMD_NAME(DBG_CFG),
285 HCMD_NAME(ANTENNA_COUPLING_NOTIFICATION),
286 HCMD_NAME(SCAN_CFG_CMD),
287 HCMD_NAME(SCAN_REQ_UMAC),
288 HCMD_NAME(SCAN_ABORT_UMAC),
289 HCMD_NAME(SCAN_COMPLETE_UMAC),
290 HCMD_NAME(TOF_CMD),
291 HCMD_NAME(TOF_NOTIFICATION),
292 HCMD_NAME(ADD_STA_KEY),
293 HCMD_NAME(ADD_STA),
294 HCMD_NAME(REMOVE_STA),
295 HCMD_NAME(FW_GET_ITEM_CMD),
296 HCMD_NAME(TX_CMD),
297 HCMD_NAME(SCD_QUEUE_CFG),
298 HCMD_NAME(TXPATH_FLUSH),
299 HCMD_NAME(MGMT_MCAST_KEY),
300 HCMD_NAME(WEP_KEY),
301 HCMD_NAME(SHARED_MEM_CFG),
302 HCMD_NAME(TDLS_CHANNEL_SWITCH_CMD),
303 HCMD_NAME(MAC_CONTEXT_CMD),
304 HCMD_NAME(TIME_EVENT_CMD),
305 HCMD_NAME(TIME_EVENT_NOTIFICATION),
306 HCMD_NAME(BINDING_CONTEXT_CMD),
307 HCMD_NAME(TIME_QUOTA_CMD),
308 HCMD_NAME(NON_QOS_TX_COUNTER_CMD),
309 HCMD_NAME(LQ_CMD),
310 HCMD_NAME(FW_PAGING_BLOCK_CMD),
311 HCMD_NAME(SCAN_OFFLOAD_REQUEST_CMD),
312 HCMD_NAME(SCAN_OFFLOAD_ABORT_CMD),
313 HCMD_NAME(HOT_SPOT_CMD),
314 HCMD_NAME(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
315 HCMD_NAME(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
316 HCMD_NAME(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
317 HCMD_NAME(BT_COEX_UPDATE_SW_BOOST),
318 HCMD_NAME(BT_COEX_UPDATE_CORUN_LUT),
319 HCMD_NAME(BT_COEX_UPDATE_REDUCED_TXP),
320 HCMD_NAME(BT_COEX_CI),
321 HCMD_NAME(PHY_CONFIGURATION_CMD),
322 HCMD_NAME(CALIB_RES_NOTIF_PHY_DB),
323 HCMD_NAME(SCAN_OFFLOAD_COMPLETE),
324 HCMD_NAME(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
325 HCMD_NAME(SCAN_OFFLOAD_CONFIG_CMD),
326 HCMD_NAME(POWER_TABLE_CMD),
327 HCMD_NAME(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
328 HCMD_NAME(REPLY_THERMAL_MNG_BACKOFF),
329 HCMD_NAME(DC2DC_CONFIG_CMD),
330 HCMD_NAME(NVM_ACCESS_CMD),
331 HCMD_NAME(SET_CALIB_DEFAULT_CMD),
332 HCMD_NAME(BEACON_NOTIFICATION),
333 HCMD_NAME(BEACON_TEMPLATE_CMD),
334 HCMD_NAME(TX_ANT_CONFIGURATION_CMD),
335 HCMD_NAME(BT_CONFIG),
336 HCMD_NAME(STATISTICS_CMD),
337 HCMD_NAME(STATISTICS_NOTIFICATION),
338 HCMD_NAME(EOSP_NOTIFICATION),
339 HCMD_NAME(REDUCE_TX_POWER_CMD),
340 HCMD_NAME(CARD_STATE_CMD),
341 HCMD_NAME(CARD_STATE_NOTIFICATION),
342 HCMD_NAME(MISSED_BEACONS_NOTIFICATION),
343 HCMD_NAME(TDLS_CONFIG_CMD),
344 HCMD_NAME(MAC_PM_POWER_TABLE),
345 HCMD_NAME(TDLS_CHANNEL_SWITCH_NOTIFICATION),
346 HCMD_NAME(MFUART_LOAD_NOTIFICATION),
347 HCMD_NAME(SCAN_ITERATION_COMPLETE_UMAC),
348 HCMD_NAME(REPLY_RX_PHY_CMD),
349 HCMD_NAME(REPLY_RX_MPDU_CMD),
350 HCMD_NAME(BA_NOTIF),
351 HCMD_NAME(MCC_UPDATE_CMD),
352 HCMD_NAME(MCC_CHUB_UPDATE_CMD),
353 HCMD_NAME(MARKER_CMD),
354 HCMD_NAME(BT_COEX_PRIO_TABLE),
355 HCMD_NAME(BT_COEX_PROT_ENV),
356 HCMD_NAME(BT_PROFILE_NOTIFICATION),
357 HCMD_NAME(BCAST_FILTER_CMD),
358 HCMD_NAME(MCAST_FILTER_CMD),
359 HCMD_NAME(REPLY_SF_CFG_CMD),
360 HCMD_NAME(REPLY_BEACON_FILTERING_CMD),
361 HCMD_NAME(D3_CONFIG_CMD),
362 HCMD_NAME(PROT_OFFLOAD_CONFIG_CMD),
363 HCMD_NAME(OFFLOADS_QUERY_CMD),
364 HCMD_NAME(REMOTE_WAKE_CONFIG_CMD),
365 HCMD_NAME(MATCH_FOUND_NOTIFICATION),
366 HCMD_NAME(CMD_DTS_MEASUREMENT_TRIGGER),
367 HCMD_NAME(DTS_MEASUREMENT_NOTIFICATION),
368 HCMD_NAME(WOWLAN_PATTERNS),
369 HCMD_NAME(WOWLAN_CONFIGURATION),
370 HCMD_NAME(WOWLAN_TSC_RSC_PARAM),
371 HCMD_NAME(WOWLAN_TKIP_PARAM),
372 HCMD_NAME(WOWLAN_KEK_KCK_MATERIAL),
373 HCMD_NAME(WOWLAN_GET_STATUSES),
374 HCMD_NAME(WOWLAN_TX_POWER_PER_DB),
375 HCMD_NAME(SCAN_ITERATION_COMPLETE),
376 HCMD_NAME(D0I3_END_CMD),
377 HCMD_NAME(LTR_CONFIG),
378 HCMD_NAME(REPLY_DEBUG_CMD),
379 };
380
381 /* Please keep this array *SORTED* by hex value.
382 * Access is done through binary search
383 */
384 static const struct iwl_hcmd_names iwl_mvm_phy_names[] = {
385 HCMD_NAME(CMD_DTS_MEASUREMENT_TRIGGER_WIDE),
386 HCMD_NAME(DTS_MEASUREMENT_NOTIF_WIDE),
387 };
388
389 static const struct iwl_hcmd_arr iwl_mvm_groups[] = {
390 [LEGACY_GROUP] = HCMD_ARR(iwl_mvm_legacy_names),
391 [LONG_GROUP] = HCMD_ARR(iwl_mvm_legacy_names),
392 [PHY_OPS_GROUP] = HCMD_ARR(iwl_mvm_phy_names),
393 };
394
395
396 /* this forward declaration can avoid to export the function */
397 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
398 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
399
400 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
401 {
402 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
403
404 if (!pwr_tx_backoff)
405 return 0;
406
407 while (pwr_tx_backoff->pwr) {
408 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
409 return pwr_tx_backoff->backoff;
410
411 pwr_tx_backoff++;
412 }
413
414 return 0;
415 }
416
417 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
418
419 static struct iwl_op_mode *
420 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
421 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
422 {
423 struct ieee80211_hw *hw;
424 struct iwl_op_mode *op_mode;
425 struct iwl_mvm *mvm;
426 struct iwl_trans_config trans_cfg = {};
427 static const u8 no_reclaim_cmds[] = {
428 TX_CMD,
429 };
430 int err, scan_size;
431 u32 min_backoff;
432
433 /*
434 * We use IWL_MVM_STATION_COUNT to check the validity of the station
435 * index all over the driver - check that its value corresponds to the
436 * array size.
437 */
438 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
439
440 /********************************
441 * 1. Allocating and configuring HW data
442 ********************************/
443 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
444 sizeof(struct iwl_mvm),
445 &iwl_mvm_hw_ops);
446 if (!hw)
447 return NULL;
448
449 if (cfg->max_rx_agg_size)
450 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
451
452 if (cfg->max_tx_agg_size)
453 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
454
455 op_mode = hw->priv;
456
457 mvm = IWL_OP_MODE_GET_MVM(op_mode);
458 mvm->dev = trans->dev;
459 mvm->trans = trans;
460 mvm->cfg = cfg;
461 mvm->fw = fw;
462 mvm->hw = hw;
463
464 if (iwl_mvm_has_new_rx_api(mvm)) {
465 op_mode->ops = &iwl_mvm_ops_mq;
466 } else {
467 op_mode->ops = &iwl_mvm_ops;
468
469 if (WARN_ON(trans->num_rx_queues > 1))
470 goto out_free;
471 }
472
473 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
474
475 mvm->aux_queue = 15;
476 mvm->first_agg_queue = 16;
477 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
478 if (mvm->cfg->base_params->num_of_queues == 16) {
479 mvm->aux_queue = 11;
480 mvm->first_agg_queue = 12;
481 }
482 mvm->sf_state = SF_UNINIT;
483 mvm->cur_ucode = IWL_UCODE_INIT;
484
485 mutex_init(&mvm->mutex);
486 mutex_init(&mvm->d0i3_suspend_mutex);
487 spin_lock_init(&mvm->async_handlers_lock);
488 INIT_LIST_HEAD(&mvm->time_event_list);
489 INIT_LIST_HEAD(&mvm->aux_roc_te_list);
490 INIT_LIST_HEAD(&mvm->async_handlers_list);
491 spin_lock_init(&mvm->time_event_lock);
492 spin_lock_init(&mvm->queue_info_lock);
493
494 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
495 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
496 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
497 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
498 INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
499 INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
500
501 spin_lock_init(&mvm->d0i3_tx_lock);
502 spin_lock_init(&mvm->refs_lock);
503 skb_queue_head_init(&mvm->d0i3_tx);
504 init_waitqueue_head(&mvm->d0i3_exit_waitq);
505
506 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
507
508 /*
509 * Populate the state variables that the transport layer needs
510 * to know about.
511 */
512 trans_cfg.op_mode = op_mode;
513 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
514 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
515 switch (iwlwifi_mod_params.amsdu_size) {
516 case IWL_AMSDU_4K:
517 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
518 break;
519 case IWL_AMSDU_8K:
520 trans_cfg.rx_buf_size = IWL_AMSDU_8K;
521 break;
522 case IWL_AMSDU_12K:
523 trans_cfg.rx_buf_size = IWL_AMSDU_12K;
524 break;
525 default:
526 pr_err("%s: Unsupported amsdu_size: %d\n", KBUILD_MODNAME,
527 iwlwifi_mod_params.amsdu_size);
528 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
529 }
530 trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
531 IWL_UCODE_TLV_API_WIDE_CMD_HDR);
532
533 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
534 trans_cfg.bc_table_dword = true;
535
536 trans_cfg.command_groups = iwl_mvm_groups;
537 trans_cfg.command_groups_size = ARRAY_SIZE(iwl_mvm_groups);
538
539 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
540 trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
541 trans_cfg.scd_set_active = true;
542
543 trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
544
545 /* Set a short watchdog for the command queue */
546 trans_cfg.cmd_q_wdg_timeout =
547 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
548
549 snprintf(mvm->hw->wiphy->fw_version,
550 sizeof(mvm->hw->wiphy->fw_version),
551 "%s", fw->fw_version);
552
553 /* Configure transport layer */
554 iwl_trans_configure(mvm->trans, &trans_cfg);
555
556 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
557 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
558 trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
559 trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
560 memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
561 sizeof(trans->dbg_conf_tlv));
562 trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
563
564 /* set up notification wait support */
565 iwl_notification_wait_init(&mvm->notif_wait);
566
567 /* Init phy db */
568 mvm->phy_db = iwl_phy_db_init(trans);
569 if (!mvm->phy_db) {
570 IWL_ERR(mvm, "Cannot init phy_db\n");
571 goto out_free;
572 }
573
574 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
575 mvm->cfg->name, mvm->trans->hw_rev);
576
577 min_backoff = calc_min_backoff(trans, cfg);
578 iwl_mvm_tt_initialize(mvm, min_backoff);
579
580 if (iwlwifi_mod_params.nvm_file)
581 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
582 else
583 IWL_DEBUG_EEPROM(mvm->trans->dev,
584 "working without external nvm file\n");
585
586 if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
587 "not allowing power-up and not having nvm_file\n"))
588 goto out_free;
589
590 /*
591 * Even if nvm exists in the nvm_file driver should read again the nvm
592 * from the nic because there might be entries that exist in the OTP
593 * and not in the file.
594 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
595 */
596 if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
597 err = iwl_nvm_init(mvm, false);
598 if (err)
599 goto out_free;
600 } else {
601 err = iwl_trans_start_hw(mvm->trans);
602 if (err)
603 goto out_free;
604
605 mutex_lock(&mvm->mutex);
606 iwl_mvm_ref(mvm, IWL_MVM_REF_INIT_UCODE);
607 err = iwl_run_init_mvm_ucode(mvm, true);
608 if (!err || !iwlmvm_mod_params.init_dbg)
609 iwl_trans_stop_device(trans);
610 iwl_mvm_unref(mvm, IWL_MVM_REF_INIT_UCODE);
611 mutex_unlock(&mvm->mutex);
612 /* returns 0 if successful, 1 if success but in rfkill */
613 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
614 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
615 goto out_free;
616 }
617 }
618
619 scan_size = iwl_mvm_scan_size(mvm);
620
621 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
622 if (!mvm->scan_cmd)
623 goto out_free;
624
625 /* Set EBS as successful as long as not stated otherwise by the FW. */
626 mvm->last_ebs_successful = true;
627
628 err = iwl_mvm_mac_setup_register(mvm);
629 if (err)
630 goto out_free;
631
632 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
633 if (err)
634 goto out_unregister;
635
636 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
637
638 /* rpm starts with a taken reference, we can release it now */
639 iwl_trans_unref(mvm->trans);
640
641 iwl_mvm_tof_init(mvm);
642
643 return op_mode;
644
645 out_unregister:
646 ieee80211_unregister_hw(mvm->hw);
647 iwl_mvm_leds_exit(mvm);
648 out_free:
649 flush_delayed_work(&mvm->fw_dump_wk);
650 iwl_phy_db_free(mvm->phy_db);
651 kfree(mvm->scan_cmd);
652 if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
653 iwl_trans_op_mode_leave(trans);
654 ieee80211_free_hw(mvm->hw);
655 return NULL;
656 }
657
658 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
659 {
660 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
661 int i;
662
663 iwl_mvm_leds_exit(mvm);
664
665 iwl_mvm_tt_exit(mvm);
666
667 ieee80211_unregister_hw(mvm->hw);
668
669 kfree(mvm->scan_cmd);
670 kfree(mvm->mcast_filter_cmd);
671 mvm->mcast_filter_cmd = NULL;
672
673 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
674 kfree(mvm->d3_resume_sram);
675 #endif
676
677 iwl_trans_op_mode_leave(mvm->trans);
678
679 iwl_phy_db_free(mvm->phy_db);
680 mvm->phy_db = NULL;
681
682 iwl_free_nvm_data(mvm->nvm_data);
683 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
684 kfree(mvm->nvm_sections[i].data);
685
686 iwl_mvm_tof_clean(mvm);
687
688 ieee80211_free_hw(mvm->hw);
689 }
690
691 struct iwl_async_handler_entry {
692 struct list_head list;
693 struct iwl_rx_cmd_buffer rxb;
694 void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
695 };
696
697 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
698 {
699 struct iwl_async_handler_entry *entry, *tmp;
700
701 spin_lock_bh(&mvm->async_handlers_lock);
702 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
703 iwl_free_rxb(&entry->rxb);
704 list_del(&entry->list);
705 kfree(entry);
706 }
707 spin_unlock_bh(&mvm->async_handlers_lock);
708 }
709
710 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
711 {
712 struct iwl_mvm *mvm =
713 container_of(wk, struct iwl_mvm, async_handlers_wk);
714 struct iwl_async_handler_entry *entry, *tmp;
715 struct list_head local_list;
716
717 INIT_LIST_HEAD(&local_list);
718
719 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
720 mutex_lock(&mvm->mutex);
721
722 /*
723 * Sync with Rx path with a lock. Remove all the entries from this list,
724 * add them to a local one (lock free), and then handle them.
725 */
726 spin_lock_bh(&mvm->async_handlers_lock);
727 list_splice_init(&mvm->async_handlers_list, &local_list);
728 spin_unlock_bh(&mvm->async_handlers_lock);
729
730 list_for_each_entry_safe(entry, tmp, &local_list, list) {
731 entry->fn(mvm, &entry->rxb);
732 iwl_free_rxb(&entry->rxb);
733 list_del(&entry->list);
734 kfree(entry);
735 }
736 mutex_unlock(&mvm->mutex);
737 }
738
739 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
740 struct iwl_rx_packet *pkt)
741 {
742 struct iwl_fw_dbg_trigger_tlv *trig;
743 struct iwl_fw_dbg_trigger_cmd *cmds_trig;
744 int i;
745
746 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
747 return;
748
749 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
750 cmds_trig = (void *)trig->data;
751
752 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
753 return;
754
755 for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
756 /* don't collect on CMD 0 */
757 if (!cmds_trig->cmds[i].cmd_id)
758 break;
759
760 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
761 cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
762 continue;
763
764 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
765 "CMD 0x%02x.%02x received",
766 pkt->hdr.group_id, pkt->hdr.cmd);
767 break;
768 }
769 }
770
771 static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
772 struct iwl_rx_cmd_buffer *rxb,
773 struct iwl_rx_packet *pkt)
774 {
775 int i;
776
777 iwl_mvm_rx_check_trigger(mvm, pkt);
778
779 /*
780 * Do the notification wait before RX handlers so
781 * even if the RX handler consumes the RXB we have
782 * access to it in the notification wait entry.
783 */
784 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
785
786 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
787 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
788 struct iwl_async_handler_entry *entry;
789
790 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
791 continue;
792
793 if (!rx_h->async) {
794 rx_h->fn(mvm, rxb);
795 return;
796 }
797
798 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
799 /* we can't do much... */
800 if (!entry)
801 return;
802
803 entry->rxb._page = rxb_steal_page(rxb);
804 entry->rxb._offset = rxb->_offset;
805 entry->rxb._rx_page_order = rxb->_rx_page_order;
806 entry->fn = rx_h->fn;
807 spin_lock(&mvm->async_handlers_lock);
808 list_add_tail(&entry->list, &mvm->async_handlers_list);
809 spin_unlock(&mvm->async_handlers_lock);
810 schedule_work(&mvm->async_handlers_wk);
811 break;
812 }
813 }
814
815 static void iwl_mvm_rx(struct iwl_op_mode *op_mode,
816 struct napi_struct *napi,
817 struct iwl_rx_cmd_buffer *rxb)
818 {
819 struct iwl_rx_packet *pkt = rxb_addr(rxb);
820 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
821
822 if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
823 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
824 else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
825 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
826 else
827 iwl_mvm_rx_common(mvm, rxb, pkt);
828 }
829
830 static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
831 struct napi_struct *napi,
832 struct iwl_rx_cmd_buffer *rxb)
833 {
834 struct iwl_rx_packet *pkt = rxb_addr(rxb);
835 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
836
837 if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
838 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
839 else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
840 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
841 else
842 iwl_mvm_rx_common(mvm, rxb, pkt);
843 }
844
845 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
846 {
847 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
848 unsigned long mq;
849 int q;
850
851 spin_lock_bh(&mvm->queue_info_lock);
852 mq = mvm->queue_info[queue].hw_queue_to_mac80211;
853 spin_unlock_bh(&mvm->queue_info_lock);
854
855 if (WARN_ON_ONCE(!mq))
856 return;
857
858 for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
859 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[q]) > 1) {
860 IWL_DEBUG_TX_QUEUES(mvm,
861 "queue %d (mac80211 %d) already stopped\n",
862 queue, q);
863 continue;
864 }
865
866 ieee80211_stop_queue(mvm->hw, q);
867 }
868 }
869
870 static void iwl_mvm_async_cb(struct iwl_op_mode *op_mode,
871 const struct iwl_device_cmd *cmd)
872 {
873 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
874
875 /*
876 * For now, we only set the CMD_WANT_ASYNC_CALLBACK for ADD_STA
877 * commands that need to block the Tx queues.
878 */
879 iwl_trans_block_txq_ptrs(mvm->trans, false);
880 }
881
882 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
883 {
884 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
885 unsigned long mq;
886 int q;
887
888 spin_lock_bh(&mvm->queue_info_lock);
889 mq = mvm->queue_info[queue].hw_queue_to_mac80211;
890 spin_unlock_bh(&mvm->queue_info_lock);
891
892 if (WARN_ON_ONCE(!mq))
893 return;
894
895 for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
896 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[q]) > 0) {
897 IWL_DEBUG_TX_QUEUES(mvm,
898 "queue %d (mac80211 %d) still stopped\n",
899 queue, q);
900 continue;
901 }
902
903 ieee80211_wake_queue(mvm->hw, q);
904 }
905 }
906
907 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
908 {
909 if (state)
910 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
911 else
912 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
913
914 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
915 }
916
917 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
918 {
919 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
920 bool calibrating = ACCESS_ONCE(mvm->calibrating);
921
922 if (state)
923 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
924 else
925 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
926
927 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
928
929 /* iwl_run_init_mvm_ucode is waiting for results, abort it */
930 if (calibrating)
931 iwl_abort_notification_waits(&mvm->notif_wait);
932
933 /*
934 * Stop the device if we run OPERATIONAL firmware or if we are in the
935 * middle of the calibrations.
936 */
937 return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
938 }
939
940 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
941 {
942 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
943 struct ieee80211_tx_info *info;
944
945 info = IEEE80211_SKB_CB(skb);
946 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
947 ieee80211_free_txskb(mvm->hw, skb);
948 }
949
950 struct iwl_mvm_reprobe {
951 struct device *dev;
952 struct work_struct work;
953 };
954
955 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
956 {
957 struct iwl_mvm_reprobe *reprobe;
958
959 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
960 if (device_reprobe(reprobe->dev))
961 dev_err(reprobe->dev, "reprobe failed!\n");
962 kfree(reprobe);
963 module_put(THIS_MODULE);
964 }
965
966 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
967 {
968 struct iwl_mvm *mvm =
969 container_of(work, struct iwl_mvm, fw_dump_wk.work);
970
971 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
972 return;
973
974 mutex_lock(&mvm->mutex);
975
976 /* stop recording */
977 if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
978 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
979 } else {
980 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
981 /* wait before we collect the data till the DBGC stop */
982 udelay(100);
983 }
984
985 iwl_mvm_fw_error_dump(mvm);
986
987 /* start recording again if the firmware is not crashed */
988 WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
989 mvm->fw->dbg_dest_tlv &&
990 iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
991
992 mutex_unlock(&mvm->mutex);
993
994 iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
995 }
996
997 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
998 {
999 iwl_abort_notification_waits(&mvm->notif_wait);
1000
1001 /*
1002 * This is a bit racy, but worst case we tell mac80211 about
1003 * a stopped/aborted scan when that was already done which
1004 * is not a problem. It is necessary to abort any os scan
1005 * here because mac80211 requires having the scan cleared
1006 * before restarting.
1007 * We'll reset the scan_status to NONE in restart cleanup in
1008 * the next start() call from mac80211. If restart isn't called
1009 * (no fw restart) scan status will stay busy.
1010 */
1011 iwl_mvm_report_scan_aborted(mvm);
1012
1013 /*
1014 * If we're restarting already, don't cycle restarts.
1015 * If INIT fw asserted, it will likely fail again.
1016 * If WoWLAN fw asserted, don't restart either, mac80211
1017 * can't recover this since we're already half suspended.
1018 */
1019 if (!mvm->restart_fw && fw_error) {
1020 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
1021 NULL);
1022 } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1023 &mvm->status)) {
1024 struct iwl_mvm_reprobe *reprobe;
1025
1026 IWL_ERR(mvm,
1027 "Firmware error during reconfiguration - reprobe!\n");
1028
1029 /*
1030 * get a module reference to avoid doing this while unloading
1031 * anyway and to avoid scheduling a work with code that's
1032 * being removed.
1033 */
1034 if (!try_module_get(THIS_MODULE)) {
1035 IWL_ERR(mvm, "Module is being unloaded - abort\n");
1036 return;
1037 }
1038
1039 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
1040 if (!reprobe) {
1041 module_put(THIS_MODULE);
1042 return;
1043 }
1044 reprobe->dev = mvm->trans->dev;
1045 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
1046 schedule_work(&reprobe->work);
1047 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
1048 /* don't let the transport/FW power down */
1049 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1050
1051 if (fw_error && mvm->restart_fw > 0)
1052 mvm->restart_fw--;
1053 ieee80211_restart_hw(mvm->hw);
1054 }
1055 }
1056
1057 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
1058 {
1059 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1060
1061 iwl_mvm_dump_nic_error_log(mvm);
1062
1063 iwl_mvm_nic_restart(mvm, true);
1064 }
1065
1066 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
1067 {
1068 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1069
1070 WARN_ON(1);
1071 iwl_mvm_nic_restart(mvm, true);
1072 }
1073
1074 struct iwl_d0i3_iter_data {
1075 struct iwl_mvm *mvm;
1076 u8 ap_sta_id;
1077 u8 vif_count;
1078 u8 offloading_tid;
1079 bool disable_offloading;
1080 };
1081
1082 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
1083 struct ieee80211_vif *vif,
1084 struct iwl_d0i3_iter_data *iter_data)
1085 {
1086 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1087 struct ieee80211_sta *ap_sta;
1088 struct iwl_mvm_sta *mvmsta;
1089 u32 available_tids = 0;
1090 u8 tid;
1091
1092 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
1093 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
1094 return false;
1095
1096 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
1097 if (IS_ERR_OR_NULL(ap_sta))
1098 return false;
1099
1100 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
1101 spin_lock_bh(&mvmsta->lock);
1102 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1103 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1104
1105 /*
1106 * in case of pending tx packets, don't use this tid
1107 * for offloading in order to prevent reuse of the same
1108 * qos seq counters.
1109 */
1110 if (iwl_mvm_tid_queued(tid_data))
1111 continue;
1112
1113 if (tid_data->state != IWL_AGG_OFF)
1114 continue;
1115
1116 available_tids |= BIT(tid);
1117 }
1118 spin_unlock_bh(&mvmsta->lock);
1119
1120 /*
1121 * disallow protocol offloading if we have no available tid
1122 * (with no pending frames and no active aggregation,
1123 * as we don't handle "holes" properly - the scheduler needs the
1124 * frame's seq number and TFD index to match)
1125 */
1126 if (!available_tids)
1127 return true;
1128
1129 /* for simplicity, just use the first available tid */
1130 iter_data->offloading_tid = ffs(available_tids) - 1;
1131 return false;
1132 }
1133
1134 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1135 struct ieee80211_vif *vif)
1136 {
1137 struct iwl_d0i3_iter_data *data = _data;
1138 struct iwl_mvm *mvm = data->mvm;
1139 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1140 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1141
1142 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1143 if (vif->type != NL80211_IFTYPE_STATION ||
1144 !vif->bss_conf.assoc)
1145 return;
1146
1147 /*
1148 * in case of pending tx packets or active aggregations,
1149 * avoid offloading features in order to prevent reuse of
1150 * the same qos seq counters.
1151 */
1152 if (iwl_mvm_disallow_offloading(mvm, vif, data))
1153 data->disable_offloading = true;
1154
1155 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1156 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading,
1157 false, flags);
1158
1159 /*
1160 * on init/association, mvm already configures POWER_TABLE_CMD
1161 * and REPLY_MCAST_FILTER_CMD, so currently don't
1162 * reconfigure them (we might want to use different
1163 * params later on, though).
1164 */
1165 data->ap_sta_id = mvmvif->ap_sta_id;
1166 data->vif_count++;
1167 }
1168
1169 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1170 struct iwl_wowlan_config_cmd *cmd,
1171 struct iwl_d0i3_iter_data *iter_data)
1172 {
1173 struct ieee80211_sta *ap_sta;
1174 struct iwl_mvm_sta *mvm_ap_sta;
1175
1176 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1177 return;
1178
1179 rcu_read_lock();
1180
1181 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1182 if (IS_ERR_OR_NULL(ap_sta))
1183 goto out;
1184
1185 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1186 cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1187 cmd->offloading_tid = iter_data->offloading_tid;
1188
1189 /*
1190 * The d0i3 uCode takes care of the nonqos counters,
1191 * so configure only the qos seq ones.
1192 */
1193 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1194 out:
1195 rcu_read_unlock();
1196 }
1197
1198 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1199 {
1200 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1201 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1202 int ret;
1203 struct iwl_d0i3_iter_data d0i3_iter_data = {
1204 .mvm = mvm,
1205 };
1206 struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1207 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1208 IWL_WOWLAN_WAKEUP_BEACON_MISS |
1209 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1210 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1211 };
1212 struct iwl_d3_manager_config d3_cfg_cmd = {
1213 .min_sleep_time = cpu_to_le32(1000),
1214 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1215 };
1216
1217 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1218
1219 if (WARN_ON_ONCE(mvm->cur_ucode != IWL_UCODE_REGULAR))
1220 return -EINVAL;
1221
1222 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1223
1224 /*
1225 * iwl_mvm_ref_sync takes a reference before checking the flag.
1226 * so by checking there is no held reference we prevent a state
1227 * in which iwl_mvm_ref_sync continues successfully while we
1228 * configure the firmware to enter d0i3
1229 */
1230 if (iwl_mvm_ref_taken(mvm)) {
1231 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1232 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1233 wake_up(&mvm->d0i3_exit_waitq);
1234 return 1;
1235 }
1236
1237 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1238 IEEE80211_IFACE_ITER_NORMAL,
1239 iwl_mvm_enter_d0i3_iterator,
1240 &d0i3_iter_data);
1241 if (d0i3_iter_data.vif_count == 1) {
1242 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1243 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1244 } else {
1245 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1246 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1247 mvm->d0i3_offloading = false;
1248 }
1249
1250 /* make sure we have no running tx while configuring the seqno */
1251 synchronize_net();
1252
1253 /* Flush the hw queues, in case something got queued during entry */
1254 ret = iwl_mvm_flush_tx_path(mvm, iwl_mvm_flushable_queues(mvm), flags);
1255 if (ret)
1256 return ret;
1257
1258 /* configure wowlan configuration only if needed */
1259 if (mvm->d0i3_ap_sta_id != IWL_MVM_STATION_COUNT) {
1260 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd,
1261 &d0i3_iter_data);
1262
1263 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1264 sizeof(wowlan_config_cmd),
1265 &wowlan_config_cmd);
1266 if (ret)
1267 return ret;
1268 }
1269
1270 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1271 flags | CMD_MAKE_TRANS_IDLE,
1272 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1273 }
1274
1275 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1276 struct ieee80211_vif *vif)
1277 {
1278 struct iwl_mvm *mvm = _data;
1279 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1280
1281 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1282 if (vif->type != NL80211_IFTYPE_STATION ||
1283 !vif->bss_conf.assoc)
1284 return;
1285
1286 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1287 }
1288
1289 struct iwl_mvm_wakeup_reason_iter_data {
1290 struct iwl_mvm *mvm;
1291 u32 wakeup_reasons;
1292 };
1293
1294 static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
1295 struct ieee80211_vif *vif)
1296 {
1297 struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1298 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1299
1300 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1301 data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
1302 if (data->wakeup_reasons &
1303 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
1304 iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
1305 else
1306 ieee80211_beacon_loss(vif);
1307 }
1308 }
1309
1310 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1311 {
1312 struct ieee80211_sta *sta = NULL;
1313 struct iwl_mvm_sta *mvm_ap_sta;
1314 int i;
1315 bool wake_queues = false;
1316
1317 lockdep_assert_held(&mvm->mutex);
1318
1319 spin_lock_bh(&mvm->d0i3_tx_lock);
1320
1321 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1322 goto out;
1323
1324 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1325
1326 /* get the sta in order to update seq numbers and re-enqueue skbs */
1327 sta = rcu_dereference_protected(
1328 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1329 lockdep_is_held(&mvm->mutex));
1330
1331 if (IS_ERR_OR_NULL(sta)) {
1332 sta = NULL;
1333 goto out;
1334 }
1335
1336 if (mvm->d0i3_offloading && qos_seq) {
1337 /* update qos seq numbers if offloading was enabled */
1338 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1339 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1340 u16 seq = le16_to_cpu(qos_seq[i]);
1341 /* firmware stores last-used one, we store next one */
1342 seq += 0x10;
1343 mvm_ap_sta->tid_data[i].seq_number = seq;
1344 }
1345 }
1346 out:
1347 /* re-enqueue (or drop) all packets */
1348 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1349 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1350
1351 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1352 ieee80211_free_txskb(mvm->hw, skb);
1353
1354 /* if the skb_queue is not empty, we need to wake queues */
1355 wake_queues = true;
1356 }
1357 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1358 wake_up(&mvm->d0i3_exit_waitq);
1359 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1360 if (wake_queues)
1361 ieee80211_wake_queues(mvm->hw);
1362
1363 spin_unlock_bh(&mvm->d0i3_tx_lock);
1364 }
1365
1366 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1367 {
1368 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1369 struct iwl_host_cmd get_status_cmd = {
1370 .id = WOWLAN_GET_STATUSES,
1371 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1372 };
1373 struct iwl_wowlan_status *status;
1374 int ret;
1375 u32 handled_reasons, wakeup_reasons = 0;
1376 __le16 *qos_seq = NULL;
1377
1378 mutex_lock(&mvm->mutex);
1379 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1380 if (ret)
1381 goto out;
1382
1383 if (!get_status_cmd.resp_pkt)
1384 goto out;
1385
1386 status = (void *)get_status_cmd.resp_pkt->data;
1387 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1388 qos_seq = status->qos_seq_ctr;
1389
1390 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1391
1392 handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1393 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1394 if (wakeup_reasons & handled_reasons) {
1395 struct iwl_mvm_wakeup_reason_iter_data data = {
1396 .mvm = mvm,
1397 .wakeup_reasons = wakeup_reasons,
1398 };
1399
1400 ieee80211_iterate_active_interfaces(
1401 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1402 iwl_mvm_d0i3_wakeup_reason_iter, &data);
1403 }
1404 out:
1405 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1406
1407 IWL_DEBUG_INFO(mvm, "d0i3 exit completed (wakeup reasons: 0x%x)\n",
1408 wakeup_reasons);
1409
1410 /* qos_seq might point inside resp_pkt, so free it only now */
1411 if (get_status_cmd.resp_pkt)
1412 iwl_free_resp(&get_status_cmd);
1413
1414 /* the FW might have updated the regdomain */
1415 iwl_mvm_update_changed_regdom(mvm);
1416
1417 iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1418 mutex_unlock(&mvm->mutex);
1419 }
1420
1421 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1422 {
1423 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1424 CMD_WAKE_UP_TRANS;
1425 int ret;
1426
1427 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1428
1429 if (WARN_ON_ONCE(mvm->cur_ucode != IWL_UCODE_REGULAR))
1430 return -EINVAL;
1431
1432 mutex_lock(&mvm->d0i3_suspend_mutex);
1433 if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1434 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1435 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1436 mutex_unlock(&mvm->d0i3_suspend_mutex);
1437 return 0;
1438 }
1439 mutex_unlock(&mvm->d0i3_suspend_mutex);
1440
1441 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1442 if (ret)
1443 goto out;
1444
1445 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1446 IEEE80211_IFACE_ITER_NORMAL,
1447 iwl_mvm_exit_d0i3_iterator,
1448 mvm);
1449 out:
1450 schedule_work(&mvm->d0i3_exit_work);
1451 return ret;
1452 }
1453
1454 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1455 {
1456 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1457
1458 iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1459 return _iwl_mvm_exit_d0i3(mvm);
1460 }
1461
1462 #define IWL_MVM_COMMON_OPS \
1463 /* these could be differentiated */ \
1464 .async_cb = iwl_mvm_async_cb, \
1465 .queue_full = iwl_mvm_stop_sw_queue, \
1466 .queue_not_full = iwl_mvm_wake_sw_queue, \
1467 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state, \
1468 .free_skb = iwl_mvm_free_skb, \
1469 .nic_error = iwl_mvm_nic_error, \
1470 .cmd_queue_full = iwl_mvm_cmd_queue_full, \
1471 .nic_config = iwl_mvm_nic_config, \
1472 .enter_d0i3 = iwl_mvm_enter_d0i3, \
1473 .exit_d0i3 = iwl_mvm_exit_d0i3, \
1474 /* as we only register one, these MUST be common! */ \
1475 .start = iwl_op_mode_mvm_start, \
1476 .stop = iwl_op_mode_mvm_stop
1477
1478 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1479 IWL_MVM_COMMON_OPS,
1480 .rx = iwl_mvm_rx,
1481 };
1482
1483 static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
1484 struct napi_struct *napi,
1485 struct iwl_rx_cmd_buffer *rxb,
1486 unsigned int queue)
1487 {
1488 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1489
1490 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
1491 }
1492
1493 static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {
1494 IWL_MVM_COMMON_OPS,
1495 .rx = iwl_mvm_rx_mq,
1496 .rx_rss = iwl_mvm_rx_mq_rss,
1497 };
Linux kernel - Deliverables
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