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iwlwifi: 8000: change PNVM in case it doesn't match to the HW step
[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
86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
89 MODULE_LICENSE("GPL");
90
91 static const struct iwl_op_mode_ops iwl_mvm_ops;
92
93 struct iwl_mvm_mod_params iwlmvm_mod_params = {
94 .power_scheme = IWL_POWER_SCHEME_BPS,
95 .tfd_q_hang_detect = true
96 /* rest of fields are 0 by default */
97 };
98
99 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
100 MODULE_PARM_DESC(init_dbg,
101 "set to true to debug an ASSERT in INIT fw (default: false");
102 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
103 MODULE_PARM_DESC(power_scheme,
104 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
105 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
106 bool, S_IRUGO);
107 MODULE_PARM_DESC(tfd_q_hang_detect,
108 "TFD queues hang detection (default: true");
109
110 /*
111 * module init and exit functions
112 */
113 static int __init iwl_mvm_init(void)
114 {
115 int ret;
116
117 ret = iwl_mvm_rate_control_register();
118 if (ret) {
119 pr_err("Unable to register rate control algorithm: %d\n", ret);
120 return ret;
121 }
122
123 ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
124
125 if (ret) {
126 pr_err("Unable to register MVM op_mode: %d\n", ret);
127 iwl_mvm_rate_control_unregister();
128 }
129
130 return ret;
131 }
132 module_init(iwl_mvm_init);
133
134 static void __exit iwl_mvm_exit(void)
135 {
136 iwl_opmode_deregister("iwlmvm");
137 iwl_mvm_rate_control_unregister();
138 }
139 module_exit(iwl_mvm_exit);
140
141 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
142 {
143 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
144 u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
145 u32 reg_val = 0;
146 u32 phy_config = iwl_mvm_get_phy_config(mvm);
147
148 radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
149 FW_PHY_CFG_RADIO_TYPE_POS;
150 radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
151 FW_PHY_CFG_RADIO_STEP_POS;
152 radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
153 FW_PHY_CFG_RADIO_DASH_POS;
154
155 /* SKU control */
156 reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
157 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
158 reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
159 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
160
161 /* radio configuration */
162 reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
163 reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
164 reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
165
166 WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
167 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
168
169 /*
170 * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
171 * shouldn't be set to any non-zero value. The same is supposed to be
172 * true of the other HW, but unsetting them (such as the 7260) causes
173 * automatic tests to fail on seemingly unrelated errors. Need to
174 * further investigate this, but for now we'll separate cases.
175 */
176 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
177 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
178
179 iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
180 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
181 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
182 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
183 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
184 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
185 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
186 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
187 reg_val);
188
189 IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
190 radio_cfg_step, radio_cfg_dash);
191
192 /*
193 * W/A : NIC is stuck in a reset state after Early PCIe power off
194 * (PCIe power is lost before PERST# is asserted), causing ME FW
195 * to lose ownership and not being able to obtain it back.
196 */
197 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
198 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
199 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
200 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
201 }
202
203 struct iwl_rx_handlers {
204 u8 cmd_id;
205 bool async;
206 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
207 struct iwl_device_cmd *cmd);
208 };
209
210 #define RX_HANDLER(_cmd_id, _fn, _async) \
211 { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
212
213 /*
214 * Handlers for fw notifications
215 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
216 * This list should be in order of frequency for performance purposes.
217 *
218 * The handler can be SYNC - this means that it will be called in the Rx path
219 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
220 * only in this case!), it should be set as ASYNC. In that case, it will be
221 * called from a worker with mvm->mutex held.
222 */
223 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
224 RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
225 RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
226 RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
227 RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
228
229 RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
230 RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
231 RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
232 RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
233 iwl_mvm_rx_ant_coupling_notif, true),
234
235 RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
236 RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
237
238 RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
239
240 RX_HANDLER(SCAN_ITERATION_COMPLETE,
241 iwl_mvm_rx_scan_offload_iter_complete_notif, false),
242 RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
243 iwl_mvm_rx_scan_offload_complete_notif, true),
244 RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
245 false),
246 RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
247 true),
248
249 RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
250 RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
251
252 RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
253 false),
254
255 RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
256 RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
257 iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
258 RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
259
260 RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
261 true),
262 RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
263
264 };
265 #undef RX_HANDLER
266 #define CMD(x) [x] = #x
267
268 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
269 CMD(MVM_ALIVE),
270 CMD(REPLY_ERROR),
271 CMD(INIT_COMPLETE_NOTIF),
272 CMD(PHY_CONTEXT_CMD),
273 CMD(MGMT_MCAST_KEY),
274 CMD(TX_CMD),
275 CMD(TXPATH_FLUSH),
276 CMD(SHARED_MEM_CFG),
277 CMD(MAC_CONTEXT_CMD),
278 CMD(TIME_EVENT_CMD),
279 CMD(TIME_EVENT_NOTIFICATION),
280 CMD(BINDING_CONTEXT_CMD),
281 CMD(TIME_QUOTA_CMD),
282 CMD(NON_QOS_TX_COUNTER_CMD),
283 CMD(RADIO_VERSION_NOTIFICATION),
284 CMD(SCAN_REQUEST_CMD),
285 CMD(SCAN_ABORT_CMD),
286 CMD(SCAN_START_NOTIFICATION),
287 CMD(SCAN_RESULTS_NOTIFICATION),
288 CMD(SCAN_COMPLETE_NOTIFICATION),
289 CMD(NVM_ACCESS_CMD),
290 CMD(PHY_CONFIGURATION_CMD),
291 CMD(CALIB_RES_NOTIF_PHY_DB),
292 CMD(SET_CALIB_DEFAULT_CMD),
293 CMD(CALIBRATION_COMPLETE_NOTIFICATION),
294 CMD(ADD_STA_KEY),
295 CMD(ADD_STA),
296 CMD(REMOVE_STA),
297 CMD(LQ_CMD),
298 CMD(SCAN_OFFLOAD_CONFIG_CMD),
299 CMD(MATCH_FOUND_NOTIFICATION),
300 CMD(SCAN_OFFLOAD_REQUEST_CMD),
301 CMD(SCAN_OFFLOAD_ABORT_CMD),
302 CMD(HOT_SPOT_CMD),
303 CMD(SCAN_OFFLOAD_COMPLETE),
304 CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
305 CMD(SCAN_ITERATION_COMPLETE),
306 CMD(POWER_TABLE_CMD),
307 CMD(WEP_KEY),
308 CMD(REPLY_RX_PHY_CMD),
309 CMD(REPLY_RX_MPDU_CMD),
310 CMD(BEACON_NOTIFICATION),
311 CMD(BEACON_TEMPLATE_CMD),
312 CMD(STATISTICS_CMD),
313 CMD(STATISTICS_NOTIFICATION),
314 CMD(EOSP_NOTIFICATION),
315 CMD(REDUCE_TX_POWER_CMD),
316 CMD(TX_ANT_CONFIGURATION_CMD),
317 CMD(D3_CONFIG_CMD),
318 CMD(D0I3_END_CMD),
319 CMD(PROT_OFFLOAD_CONFIG_CMD),
320 CMD(OFFLOADS_QUERY_CMD),
321 CMD(REMOTE_WAKE_CONFIG_CMD),
322 CMD(WOWLAN_PATTERNS),
323 CMD(WOWLAN_CONFIGURATION),
324 CMD(WOWLAN_TSC_RSC_PARAM),
325 CMD(WOWLAN_TKIP_PARAM),
326 CMD(WOWLAN_KEK_KCK_MATERIAL),
327 CMD(WOWLAN_GET_STATUSES),
328 CMD(WOWLAN_TX_POWER_PER_DB),
329 CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
330 CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
331 CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
332 CMD(CARD_STATE_NOTIFICATION),
333 CMD(MISSED_BEACONS_NOTIFICATION),
334 CMD(BT_COEX_PRIO_TABLE),
335 CMD(BT_COEX_PROT_ENV),
336 CMD(BT_PROFILE_NOTIFICATION),
337 CMD(BT_CONFIG),
338 CMD(MCAST_FILTER_CMD),
339 CMD(BCAST_FILTER_CMD),
340 CMD(REPLY_SF_CFG_CMD),
341 CMD(REPLY_BEACON_FILTERING_CMD),
342 CMD(CMD_DTS_MEASUREMENT_TRIGGER),
343 CMD(DTS_MEASUREMENT_NOTIFICATION),
344 CMD(REPLY_THERMAL_MNG_BACKOFF),
345 CMD(MAC_PM_POWER_TABLE),
346 CMD(LTR_CONFIG),
347 CMD(BT_COEX_CI),
348 CMD(BT_COEX_UPDATE_SW_BOOST),
349 CMD(BT_COEX_UPDATE_CORUN_LUT),
350 CMD(BT_COEX_UPDATE_REDUCED_TXP),
351 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
352 CMD(ANTENNA_COUPLING_NOTIFICATION),
353 CMD(SCD_QUEUE_CFG),
354 CMD(SCAN_CFG_CMD),
355 CMD(SCAN_REQ_UMAC),
356 CMD(SCAN_ABORT_UMAC),
357 CMD(SCAN_COMPLETE_UMAC),
358 CMD(TDLS_CHANNEL_SWITCH_CMD),
359 CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
360 CMD(TDLS_CONFIG_CMD),
361 CMD(MCC_UPDATE_CMD),
362 };
363 #undef CMD
364
365 /* this forward declaration can avoid to export the function */
366 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
367 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
368
369 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
370 {
371 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
372
373 if (!pwr_tx_backoff)
374 return 0;
375
376 while (pwr_tx_backoff->pwr) {
377 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
378 return pwr_tx_backoff->backoff;
379
380 pwr_tx_backoff++;
381 }
382
383 return 0;
384 }
385
386 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
387
388 static struct iwl_op_mode *
389 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
390 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
391 {
392 struct ieee80211_hw *hw;
393 struct iwl_op_mode *op_mode;
394 struct iwl_mvm *mvm;
395 struct iwl_trans_config trans_cfg = {};
396 static const u8 no_reclaim_cmds[] = {
397 TX_CMD,
398 };
399 int err, scan_size;
400 u32 min_backoff;
401
402 /*
403 * We use IWL_MVM_STATION_COUNT to check the validity of the station
404 * index all over the driver - check that its value corresponds to the
405 * array size.
406 */
407 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
408
409 /********************************
410 * 1. Allocating and configuring HW data
411 ********************************/
412 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
413 sizeof(struct iwl_mvm),
414 &iwl_mvm_hw_ops);
415 if (!hw)
416 return NULL;
417
418 if (cfg->max_rx_agg_size)
419 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
420
421 if (cfg->max_tx_agg_size)
422 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
423
424 op_mode = hw->priv;
425 op_mode->ops = &iwl_mvm_ops;
426
427 mvm = IWL_OP_MODE_GET_MVM(op_mode);
428 mvm->dev = trans->dev;
429 mvm->trans = trans;
430 mvm->cfg = cfg;
431 mvm->fw = fw;
432 mvm->hw = hw;
433
434 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
435
436 mvm->aux_queue = 15;
437 mvm->first_agg_queue = 16;
438 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
439 if (mvm->cfg->base_params->num_of_queues == 16) {
440 mvm->aux_queue = 11;
441 mvm->first_agg_queue = 12;
442 }
443 mvm->sf_state = SF_UNINIT;
444 mvm->low_latency_agg_frame_limit = 6;
445 mvm->cur_ucode = IWL_UCODE_INIT;
446
447 mutex_init(&mvm->mutex);
448 mutex_init(&mvm->d0i3_suspend_mutex);
449 spin_lock_init(&mvm->async_handlers_lock);
450 INIT_LIST_HEAD(&mvm->time_event_list);
451 INIT_LIST_HEAD(&mvm->aux_roc_te_list);
452 INIT_LIST_HEAD(&mvm->async_handlers_list);
453 spin_lock_init(&mvm->time_event_lock);
454
455 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
456 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
457 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
458 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
459 INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
460 INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
461
462 spin_lock_init(&mvm->d0i3_tx_lock);
463 spin_lock_init(&mvm->refs_lock);
464 skb_queue_head_init(&mvm->d0i3_tx);
465 init_waitqueue_head(&mvm->d0i3_exit_waitq);
466
467 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
468
469 /*
470 * Populate the state variables that the transport layer needs
471 * to know about.
472 */
473 trans_cfg.op_mode = op_mode;
474 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
475 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
476 trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
477
478 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
479 trans_cfg.bc_table_dword = true;
480
481 trans_cfg.command_names = iwl_mvm_cmd_strings;
482
483 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
484 trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
485 trans_cfg.scd_set_active = true;
486
487 trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
488
489 /* Set a short watchdog for the command queue */
490 trans_cfg.cmd_q_wdg_timeout =
491 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
492
493 snprintf(mvm->hw->wiphy->fw_version,
494 sizeof(mvm->hw->wiphy->fw_version),
495 "%s", fw->fw_version);
496
497 /* Configure transport layer */
498 iwl_trans_configure(mvm->trans, &trans_cfg);
499
500 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
501 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
502 trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
503 trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
504 memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
505 sizeof(trans->dbg_conf_tlv));
506 trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
507
508 /* set up notification wait support */
509 iwl_notification_wait_init(&mvm->notif_wait);
510
511 /* Init phy db */
512 mvm->phy_db = iwl_phy_db_init(trans);
513 if (!mvm->phy_db) {
514 IWL_ERR(mvm, "Cannot init phy_db\n");
515 goto out_free;
516 }
517
518 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
519 mvm->cfg->name, mvm->trans->hw_rev);
520
521 min_backoff = calc_min_backoff(trans, cfg);
522 iwl_mvm_tt_initialize(mvm, min_backoff);
523 /* set the nvm_file_name according to priority */
524 if (iwlwifi_mod_params.nvm_file) {
525 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
526 } else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
527 if (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_B_STEP)
528 mvm->nvm_file_name = mvm->cfg->default_nvm_file_B_step;
529 else
530 mvm->nvm_file_name = mvm->cfg->default_nvm_file_C_step;
531 }
532
533 if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
534 "not allowing power-up and not having nvm_file\n"))
535 goto out_free;
536
537 /*
538 * Even if nvm exists in the nvm_file driver should read again the nvm
539 * from the nic because there might be entries that exist in the OTP
540 * and not in the file.
541 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
542 */
543 if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
544 err = iwl_nvm_init(mvm, false);
545 if (err)
546 goto out_free;
547 } else {
548 err = iwl_trans_start_hw(mvm->trans);
549 if (err)
550 goto out_free;
551
552 mutex_lock(&mvm->mutex);
553 err = iwl_run_init_mvm_ucode(mvm, true);
554 if (!err || !iwlmvm_mod_params.init_dbg)
555 iwl_trans_stop_device(trans);
556 mutex_unlock(&mvm->mutex);
557 /* returns 0 if successful, 1 if success but in rfkill */
558 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
559 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
560 goto out_free;
561 }
562 }
563
564 scan_size = iwl_mvm_scan_size(mvm);
565
566 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
567 if (!mvm->scan_cmd)
568 goto out_free;
569
570 /* Set EBS as successful as long as not stated otherwise by the FW. */
571 mvm->last_ebs_successful = true;
572
573 err = iwl_mvm_mac_setup_register(mvm);
574 if (err)
575 goto out_free;
576
577 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
578 if (err)
579 goto out_unregister;
580
581 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
582
583 /* rpm starts with a taken ref. only set the appropriate bit here. */
584 mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
585
586 return op_mode;
587
588 out_unregister:
589 ieee80211_unregister_hw(mvm->hw);
590 iwl_mvm_leds_exit(mvm);
591 out_free:
592 iwl_phy_db_free(mvm->phy_db);
593 kfree(mvm->scan_cmd);
594 if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
595 iwl_trans_op_mode_leave(trans);
596 ieee80211_free_hw(mvm->hw);
597 return NULL;
598 }
599
600 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
601 {
602 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
603 int i;
604
605 iwl_mvm_leds_exit(mvm);
606
607 iwl_mvm_tt_exit(mvm);
608
609 ieee80211_unregister_hw(mvm->hw);
610
611 kfree(mvm->scan_cmd);
612 kfree(mvm->mcast_filter_cmd);
613 mvm->mcast_filter_cmd = NULL;
614
615 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
616 kfree(mvm->d3_resume_sram);
617 if (mvm->nd_config) {
618 kfree(mvm->nd_config->match_sets);
619 kfree(mvm->nd_config);
620 mvm->nd_config = NULL;
621 }
622 #endif
623
624 iwl_trans_op_mode_leave(mvm->trans);
625
626 iwl_phy_db_free(mvm->phy_db);
627 mvm->phy_db = NULL;
628
629 iwl_free_nvm_data(mvm->nvm_data);
630 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
631 kfree(mvm->nvm_sections[i].data);
632
633 ieee80211_free_hw(mvm->hw);
634 }
635
636 struct iwl_async_handler_entry {
637 struct list_head list;
638 struct iwl_rx_cmd_buffer rxb;
639 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
640 struct iwl_device_cmd *cmd);
641 };
642
643 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
644 {
645 struct iwl_async_handler_entry *entry, *tmp;
646
647 spin_lock_bh(&mvm->async_handlers_lock);
648 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
649 iwl_free_rxb(&entry->rxb);
650 list_del(&entry->list);
651 kfree(entry);
652 }
653 spin_unlock_bh(&mvm->async_handlers_lock);
654 }
655
656 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
657 {
658 struct iwl_mvm *mvm =
659 container_of(wk, struct iwl_mvm, async_handlers_wk);
660 struct iwl_async_handler_entry *entry, *tmp;
661 struct list_head local_list;
662
663 INIT_LIST_HEAD(&local_list);
664
665 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
666 mutex_lock(&mvm->mutex);
667
668 /*
669 * Sync with Rx path with a lock. Remove all the entries from this list,
670 * add them to a local one (lock free), and then handle them.
671 */
672 spin_lock_bh(&mvm->async_handlers_lock);
673 list_splice_init(&mvm->async_handlers_list, &local_list);
674 spin_unlock_bh(&mvm->async_handlers_lock);
675
676 list_for_each_entry_safe(entry, tmp, &local_list, list) {
677 if (entry->fn(mvm, &entry->rxb, NULL))
678 IWL_WARN(mvm,
679 "returned value from ASYNC handlers are ignored\n");
680 iwl_free_rxb(&entry->rxb);
681 list_del(&entry->list);
682 kfree(entry);
683 }
684 mutex_unlock(&mvm->mutex);
685 }
686
687 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
688 struct iwl_rx_packet *pkt)
689 {
690 struct iwl_fw_dbg_trigger_tlv *trig;
691 struct iwl_fw_dbg_trigger_cmd *cmds_trig;
692 char buf[32];
693 int i;
694
695 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
696 return;
697
698 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
699 cmds_trig = (void *)trig->data;
700
701 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
702 return;
703
704 for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
705 /* don't collect on CMD 0 */
706 if (!cmds_trig->cmds[i].cmd_id)
707 break;
708
709 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
710 continue;
711
712 memset(buf, 0, sizeof(buf));
713 snprintf(buf, sizeof(buf), "CMD 0x%02x received", pkt->hdr.cmd);
714 iwl_mvm_fw_dbg_collect_trig(mvm, trig, buf, sizeof(buf));
715 break;
716 }
717 }
718
719 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
720 struct iwl_rx_cmd_buffer *rxb,
721 struct iwl_device_cmd *cmd)
722 {
723 struct iwl_rx_packet *pkt = rxb_addr(rxb);
724 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
725 u8 i;
726
727 iwl_mvm_rx_check_trigger(mvm, pkt);
728
729 /*
730 * Do the notification wait before RX handlers so
731 * even if the RX handler consumes the RXB we have
732 * access to it in the notification wait entry.
733 */
734 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
735
736 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
737 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
738 struct iwl_async_handler_entry *entry;
739
740 if (rx_h->cmd_id != pkt->hdr.cmd)
741 continue;
742
743 if (!rx_h->async)
744 return rx_h->fn(mvm, rxb, cmd);
745
746 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
747 /* we can't do much... */
748 if (!entry)
749 return 0;
750
751 entry->rxb._page = rxb_steal_page(rxb);
752 entry->rxb._offset = rxb->_offset;
753 entry->rxb._rx_page_order = rxb->_rx_page_order;
754 entry->fn = rx_h->fn;
755 spin_lock(&mvm->async_handlers_lock);
756 list_add_tail(&entry->list, &mvm->async_handlers_list);
757 spin_unlock(&mvm->async_handlers_lock);
758 schedule_work(&mvm->async_handlers_wk);
759 break;
760 }
761
762 return 0;
763 }
764
765 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
766 {
767 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
768 int mq = mvm->queue_to_mac80211[queue];
769
770 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
771 return;
772
773 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
774 IWL_DEBUG_TX_QUEUES(mvm,
775 "queue %d (mac80211 %d) already stopped\n",
776 queue, mq);
777 return;
778 }
779
780 ieee80211_stop_queue(mvm->hw, mq);
781 }
782
783 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
784 {
785 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
786 int mq = mvm->queue_to_mac80211[queue];
787
788 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
789 return;
790
791 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
792 IWL_DEBUG_TX_QUEUES(mvm,
793 "queue %d (mac80211 %d) still stopped\n",
794 queue, mq);
795 return;
796 }
797
798 ieee80211_wake_queue(mvm->hw, mq);
799 }
800
801 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
802 {
803 if (state)
804 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
805 else
806 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
807
808 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
809 }
810
811 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
812 {
813 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
814 bool calibrating = ACCESS_ONCE(mvm->calibrating);
815
816 if (state)
817 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
818 else
819 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
820
821 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
822
823 /* iwl_run_init_mvm_ucode is waiting for results, abort it */
824 if (calibrating)
825 iwl_abort_notification_waits(&mvm->notif_wait);
826
827 /*
828 * Stop the device if we run OPERATIONAL firmware or if we are in the
829 * middle of the calibrations.
830 */
831 return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
832 }
833
834 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
835 {
836 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
837 struct ieee80211_tx_info *info;
838
839 info = IEEE80211_SKB_CB(skb);
840 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
841 ieee80211_free_txskb(mvm->hw, skb);
842 }
843
844 struct iwl_mvm_reprobe {
845 struct device *dev;
846 struct work_struct work;
847 };
848
849 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
850 {
851 struct iwl_mvm_reprobe *reprobe;
852
853 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
854 if (device_reprobe(reprobe->dev))
855 dev_err(reprobe->dev, "reprobe failed!\n");
856 kfree(reprobe);
857 module_put(THIS_MODULE);
858 }
859
860 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
861 {
862 struct iwl_mvm *mvm =
863 container_of(work, struct iwl_mvm, fw_dump_wk.work);
864
865 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
866 return;
867
868 mutex_lock(&mvm->mutex);
869 iwl_mvm_fw_error_dump(mvm);
870
871 /* start recording again if the firmware is not crashed */
872 WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
873 mvm->fw->dbg_dest_tlv &&
874 iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
875
876 mutex_unlock(&mvm->mutex);
877
878 iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
879 }
880
881 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
882 {
883 iwl_abort_notification_waits(&mvm->notif_wait);
884
885 /*
886 * This is a bit racy, but worst case we tell mac80211 about
887 * a stopped/aborted scan when that was already done which
888 * is not a problem. It is necessary to abort any os scan
889 * here because mac80211 requires having the scan cleared
890 * before restarting.
891 * We'll reset the scan_status to NONE in restart cleanup in
892 * the next start() call from mac80211. If restart isn't called
893 * (no fw restart) scan status will stay busy.
894 */
895 iwl_mvm_report_scan_aborted(mvm);
896
897 /*
898 * If we're restarting already, don't cycle restarts.
899 * If INIT fw asserted, it will likely fail again.
900 * If WoWLAN fw asserted, don't restart either, mac80211
901 * can't recover this since we're already half suspended.
902 */
903 if (!mvm->restart_fw && fw_error) {
904 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
905 } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
906 &mvm->status)) {
907 struct iwl_mvm_reprobe *reprobe;
908
909 IWL_ERR(mvm,
910 "Firmware error during reconfiguration - reprobe!\n");
911
912 /*
913 * get a module reference to avoid doing this while unloading
914 * anyway and to avoid scheduling a work with code that's
915 * being removed.
916 */
917 if (!try_module_get(THIS_MODULE)) {
918 IWL_ERR(mvm, "Module is being unloaded - abort\n");
919 return;
920 }
921
922 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
923 if (!reprobe) {
924 module_put(THIS_MODULE);
925 return;
926 }
927 reprobe->dev = mvm->trans->dev;
928 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
929 schedule_work(&reprobe->work);
930 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
931 /* don't let the transport/FW power down */
932 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
933
934 if (fw_error && mvm->restart_fw > 0)
935 mvm->restart_fw--;
936 ieee80211_restart_hw(mvm->hw);
937 }
938 }
939
940 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
941 {
942 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
943
944 iwl_mvm_dump_nic_error_log(mvm);
945
946 iwl_mvm_nic_restart(mvm, true);
947 }
948
949 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
950 {
951 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
952
953 WARN_ON(1);
954 iwl_mvm_nic_restart(mvm, true);
955 }
956
957 struct iwl_d0i3_iter_data {
958 struct iwl_mvm *mvm;
959 u8 ap_sta_id;
960 u8 vif_count;
961 u8 offloading_tid;
962 bool disable_offloading;
963 };
964
965 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
966 struct ieee80211_vif *vif,
967 struct iwl_d0i3_iter_data *iter_data)
968 {
969 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
970 struct ieee80211_sta *ap_sta;
971 struct iwl_mvm_sta *mvmsta;
972 u32 available_tids = 0;
973 u8 tid;
974
975 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
976 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
977 return false;
978
979 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
980 if (IS_ERR_OR_NULL(ap_sta))
981 return false;
982
983 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
984 spin_lock_bh(&mvmsta->lock);
985 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
986 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
987
988 /*
989 * in case of pending tx packets, don't use this tid
990 * for offloading in order to prevent reuse of the same
991 * qos seq counters.
992 */
993 if (iwl_mvm_tid_queued(tid_data))
994 continue;
995
996 if (tid_data->state != IWL_AGG_OFF)
997 continue;
998
999 available_tids |= BIT(tid);
1000 }
1001 spin_unlock_bh(&mvmsta->lock);
1002
1003 /*
1004 * disallow protocol offloading if we have no available tid
1005 * (with no pending frames and no active aggregation,
1006 * as we don't handle "holes" properly - the scheduler needs the
1007 * frame's seq number and TFD index to match)
1008 */
1009 if (!available_tids)
1010 return true;
1011
1012 /* for simplicity, just use the first available tid */
1013 iter_data->offloading_tid = ffs(available_tids) - 1;
1014 return false;
1015 }
1016
1017 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1018 struct ieee80211_vif *vif)
1019 {
1020 struct iwl_d0i3_iter_data *data = _data;
1021 struct iwl_mvm *mvm = data->mvm;
1022 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1023 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1024
1025 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1026 if (vif->type != NL80211_IFTYPE_STATION ||
1027 !vif->bss_conf.assoc)
1028 return;
1029
1030 /*
1031 * in case of pending tx packets or active aggregations,
1032 * avoid offloading features in order to prevent reuse of
1033 * the same qos seq counters.
1034 */
1035 if (iwl_mvm_disallow_offloading(mvm, vif, data))
1036 data->disable_offloading = true;
1037
1038 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1039 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1040
1041 /*
1042 * on init/association, mvm already configures POWER_TABLE_CMD
1043 * and REPLY_MCAST_FILTER_CMD, so currently don't
1044 * reconfigure them (we might want to use different
1045 * params later on, though).
1046 */
1047 data->ap_sta_id = mvmvif->ap_sta_id;
1048 data->vif_count++;
1049 }
1050
1051 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1052 struct iwl_wowlan_config_cmd *cmd,
1053 struct iwl_d0i3_iter_data *iter_data)
1054 {
1055 struct ieee80211_sta *ap_sta;
1056 struct iwl_mvm_sta *mvm_ap_sta;
1057
1058 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1059 return;
1060
1061 rcu_read_lock();
1062
1063 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1064 if (IS_ERR_OR_NULL(ap_sta))
1065 goto out;
1066
1067 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1068 cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1069 cmd->offloading_tid = iter_data->offloading_tid;
1070
1071 /*
1072 * The d0i3 uCode takes care of the nonqos counters,
1073 * so configure only the qos seq ones.
1074 */
1075 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1076 out:
1077 rcu_read_unlock();
1078 }
1079
1080 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1081 {
1082 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1083 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1084 int ret;
1085 struct iwl_d0i3_iter_data d0i3_iter_data = {
1086 .mvm = mvm,
1087 };
1088 struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1089 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1090 IWL_WOWLAN_WAKEUP_BEACON_MISS |
1091 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1092 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1093 };
1094 struct iwl_d3_manager_config d3_cfg_cmd = {
1095 .min_sleep_time = cpu_to_le32(1000),
1096 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1097 };
1098
1099 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1100
1101 /* make sure we have no running tx while configuring the qos */
1102 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1103 synchronize_net();
1104
1105 /*
1106 * iwl_mvm_ref_sync takes a reference before checking the flag.
1107 * so by checking there is no held reference we prevent a state
1108 * in which iwl_mvm_ref_sync continues successfully while we
1109 * configure the firmware to enter d0i3
1110 */
1111 if (iwl_mvm_ref_taken(mvm)) {
1112 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1113 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1114 wake_up(&mvm->d0i3_exit_waitq);
1115 return 1;
1116 }
1117
1118 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1119 IEEE80211_IFACE_ITER_NORMAL,
1120 iwl_mvm_enter_d0i3_iterator,
1121 &d0i3_iter_data);
1122 if (d0i3_iter_data.vif_count == 1) {
1123 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1124 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1125 } else {
1126 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1127 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1128 mvm->d0i3_offloading = false;
1129 }
1130
1131 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1132 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1133 sizeof(wowlan_config_cmd),
1134 &wowlan_config_cmd);
1135 if (ret)
1136 return ret;
1137
1138 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1139 flags | CMD_MAKE_TRANS_IDLE,
1140 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1141 }
1142
1143 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1144 struct ieee80211_vif *vif)
1145 {
1146 struct iwl_mvm *mvm = _data;
1147 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1148
1149 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1150 if (vif->type != NL80211_IFTYPE_STATION ||
1151 !vif->bss_conf.assoc)
1152 return;
1153
1154 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1155 }
1156
1157 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1158 struct ieee80211_vif *vif)
1159 {
1160 struct iwl_mvm *mvm = data;
1161 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1162
1163 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1164 mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1165 ieee80211_connection_loss(vif);
1166 }
1167
1168 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1169 {
1170 struct ieee80211_sta *sta = NULL;
1171 struct iwl_mvm_sta *mvm_ap_sta;
1172 int i;
1173 bool wake_queues = false;
1174
1175 lockdep_assert_held(&mvm->mutex);
1176
1177 spin_lock_bh(&mvm->d0i3_tx_lock);
1178
1179 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1180 goto out;
1181
1182 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1183
1184 /* get the sta in order to update seq numbers and re-enqueue skbs */
1185 sta = rcu_dereference_protected(
1186 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1187 lockdep_is_held(&mvm->mutex));
1188
1189 if (IS_ERR_OR_NULL(sta)) {
1190 sta = NULL;
1191 goto out;
1192 }
1193
1194 if (mvm->d0i3_offloading && qos_seq) {
1195 /* update qos seq numbers if offloading was enabled */
1196 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1197 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1198 u16 seq = le16_to_cpu(qos_seq[i]);
1199 /* firmware stores last-used one, we store next one */
1200 seq += 0x10;
1201 mvm_ap_sta->tid_data[i].seq_number = seq;
1202 }
1203 }
1204 out:
1205 /* re-enqueue (or drop) all packets */
1206 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1207 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1208
1209 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1210 ieee80211_free_txskb(mvm->hw, skb);
1211
1212 /* if the skb_queue is not empty, we need to wake queues */
1213 wake_queues = true;
1214 }
1215 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1216 wake_up(&mvm->d0i3_exit_waitq);
1217 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1218 if (wake_queues)
1219 ieee80211_wake_queues(mvm->hw);
1220
1221 spin_unlock_bh(&mvm->d0i3_tx_lock);
1222 }
1223
1224 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1225 {
1226 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1227 struct iwl_host_cmd get_status_cmd = {
1228 .id = WOWLAN_GET_STATUSES,
1229 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1230 };
1231 struct iwl_wowlan_status *status;
1232 int ret;
1233 u32 disconnection_reasons, wakeup_reasons;
1234 __le16 *qos_seq = NULL;
1235
1236 mutex_lock(&mvm->mutex);
1237 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1238 if (ret)
1239 goto out;
1240
1241 if (!get_status_cmd.resp_pkt)
1242 goto out;
1243
1244 status = (void *)get_status_cmd.resp_pkt->data;
1245 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1246 qos_seq = status->qos_seq_ctr;
1247
1248 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1249
1250 disconnection_reasons =
1251 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1252 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1253 if (wakeup_reasons & disconnection_reasons)
1254 ieee80211_iterate_active_interfaces(
1255 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1256 iwl_mvm_d0i3_disconnect_iter, mvm);
1257
1258 iwl_free_resp(&get_status_cmd);
1259 out:
1260 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1261
1262 /* the FW might have updated the regdomain */
1263 iwl_mvm_update_changed_regdom(mvm);
1264
1265 iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1266 mutex_unlock(&mvm->mutex);
1267 }
1268
1269 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1270 {
1271 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1272 CMD_WAKE_UP_TRANS;
1273 int ret;
1274
1275 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1276
1277 mutex_lock(&mvm->d0i3_suspend_mutex);
1278 if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1279 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1280 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1281 mutex_unlock(&mvm->d0i3_suspend_mutex);
1282 return 0;
1283 }
1284 mutex_unlock(&mvm->d0i3_suspend_mutex);
1285
1286 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1287 if (ret)
1288 goto out;
1289
1290 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1291 IEEE80211_IFACE_ITER_NORMAL,
1292 iwl_mvm_exit_d0i3_iterator,
1293 mvm);
1294 out:
1295 schedule_work(&mvm->d0i3_exit_work);
1296 return ret;
1297 }
1298
1299 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1300 {
1301 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1302
1303 iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1304 return _iwl_mvm_exit_d0i3(mvm);
1305 }
1306
1307 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1308 struct napi_struct *napi,
1309 struct net_device *napi_dev,
1310 int (*poll)(struct napi_struct *, int),
1311 int weight)
1312 {
1313 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1314
1315 ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1316 }
1317
1318 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1319 .start = iwl_op_mode_mvm_start,
1320 .stop = iwl_op_mode_mvm_stop,
1321 .rx = iwl_mvm_rx_dispatch,
1322 .queue_full = iwl_mvm_stop_sw_queue,
1323 .queue_not_full = iwl_mvm_wake_sw_queue,
1324 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1325 .free_skb = iwl_mvm_free_skb,
1326 .nic_error = iwl_mvm_nic_error,
1327 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1328 .nic_config = iwl_mvm_nic_config,
1329 .enter_d0i3 = iwl_mvm_enter_d0i3,
1330 .exit_d0i3 = iwl_mvm_exit_d0i3,
1331 .napi_add = iwl_mvm_napi_add,
1332 };
Linux kernel - Deliverables
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