Merge tag 'wireless-drivers-next-for-davem-2015-10-09' of git://git.kernel.org/pub...
[firefly-linux-kernel-4.4.55.git] / drivers / net / wireless / iwlwifi / mvm / ops.c
1 /******************************************************************************
2  *
3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
5  *
6  * GPL LICENSE SUMMARY
7  *
8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of version 2 of the GNU General Public License as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23  * USA
24  *
25  * The full GNU General Public License is included in this distribution
26  * in the file called COPYING.
27  *
28  * Contact Information:
29  *  Intel Linux Wireless <ilw@linux.intel.com>
30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31  *
32  * BSD LICENSE
33  *
34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36  * All rights reserved.
37  *
38  * Redistribution and use in source and binary forms, with or without
39  * modification, are permitted provided that the following conditions
40  * are met:
41  *
42  *  * Redistributions of source code must retain the above copyright
43  *    notice, this list of conditions and the following disclaimer.
44  *  * Redistributions in binary form must reproduce the above copyright
45  *    notice, this list of conditions and the following disclaimer in
46  *    the documentation and/or other materials provided with the
47  *    distribution.
48  *  * Neither the name Intel Corporation nor the names of its
49  *    contributors may be used to endorse or promote products derived
50  *    from this software without specific prior written permission.
51  *
52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63  *
64  *****************************************************************************/
65 #include <linux/module.h>
66 #include <linux/vmalloc.h>
67 #include <net/mac80211.h>
68
69 #include "iwl-notif-wait.h"
70 #include "iwl-trans.h"
71 #include "iwl-op-mode.h"
72 #include "iwl-fw.h"
73 #include "iwl-debug.h"
74 #include "iwl-drv.h"
75 #include "iwl-modparams.h"
76 #include "mvm.h"
77 #include "iwl-phy-db.h"
78 #include "iwl-eeprom-parse.h"
79 #include "iwl-csr.h"
80 #include "iwl-io.h"
81 #include "iwl-prph.h"
82 #include "rs.h"
83 #include "fw-api-scan.h"
84 #include "time-event.h"
85
86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
89 MODULE_LICENSE("GPL");
90
91 static const struct iwl_op_mode_ops iwl_mvm_ops;
92 static const struct iwl_op_mode_ops iwl_mvm_ops_mq;
93
94 struct iwl_mvm_mod_params iwlmvm_mod_params = {
95         .power_scheme = IWL_POWER_SCHEME_BPS,
96         .tfd_q_hang_detect = true
97         /* rest of fields are 0 by default */
98 };
99
100 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
101 MODULE_PARM_DESC(init_dbg,
102                  "set to true to debug an ASSERT in INIT fw (default: false");
103 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
104 MODULE_PARM_DESC(power_scheme,
105                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
106 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
107                    bool, S_IRUGO);
108 MODULE_PARM_DESC(tfd_q_hang_detect,
109                  "TFD queues hang detection (default: true");
110
111 /*
112  * module init and exit functions
113  */
114 static int __init iwl_mvm_init(void)
115 {
116         int ret;
117
118         ret = iwl_mvm_rate_control_register();
119         if (ret) {
120                 pr_err("Unable to register rate control algorithm: %d\n", ret);
121                 return ret;
122         }
123
124         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
125
126         if (ret) {
127                 pr_err("Unable to register MVM op_mode: %d\n", ret);
128                 iwl_mvm_rate_control_unregister();
129         }
130
131         return ret;
132 }
133 module_init(iwl_mvm_init);
134
135 static void __exit iwl_mvm_exit(void)
136 {
137         iwl_opmode_deregister("iwlmvm");
138         iwl_mvm_rate_control_unregister();
139 }
140 module_exit(iwl_mvm_exit);
141
142 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
143 {
144         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
145         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
146         u32 reg_val = 0;
147         u32 phy_config = iwl_mvm_get_phy_config(mvm);
148
149         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
150                          FW_PHY_CFG_RADIO_TYPE_POS;
151         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
152                          FW_PHY_CFG_RADIO_STEP_POS;
153         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
154                          FW_PHY_CFG_RADIO_DASH_POS;
155
156         /* SKU control */
157         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
158                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
159         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
160                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
161
162         /* radio configuration */
163         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
164         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
165         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
166
167         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
168                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
169
170         /*
171          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
172          * shouldn't be set to any non-zero value. The same is supposed to be
173          * true of the other HW, but unsetting them (such as the 7260) causes
174          * automatic tests to fail on seemingly unrelated errors. Need to
175          * further investigate this, but for now we'll separate cases.
176          */
177         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
178                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
179
180         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
181                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
183                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
186                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
187                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
188                                 reg_val);
189
190         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
191                        radio_cfg_step, radio_cfg_dash);
192
193         /*
194          * W/A : NIC is stuck in a reset state after Early PCIe power off
195          * (PCIe power is lost before PERST# is asserted), causing ME FW
196          * to lose ownership and not being able to obtain it back.
197          */
198         if (!mvm->trans->cfg->apmg_not_supported)
199                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
200                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
201                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
202 }
203
204 struct iwl_rx_handlers {
205         u16 cmd_id;
206         bool async;
207         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
208 };
209
210 #define RX_HANDLER(_cmd_id, _fn, _async)        \
211         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
212 #define RX_HANDLER_GRP(_grp, _cmd, _fn, _async) \
213         { .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
214
215 /*
216  * Handlers for fw notifications
217  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
218  * This list should be in order of frequency for performance purposes.
219  *
220  * The handler can be SYNC - this means that it will be called in the Rx path
221  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
222  * only in this case!), it should be set as ASYNC. In that case, it will be
223  * called from a worker with mvm->mutex held.
224  */
225 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
226         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
227         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
228
229         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
230         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
231         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
232         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
233                    iwl_mvm_rx_ant_coupling_notif, true),
234
235         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
236         RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
237
238         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
239
240         RX_HANDLER(SCAN_ITERATION_COMPLETE,
241                    iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
242         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
243                    iwl_mvm_rx_lmac_scan_complete_notif, true),
244         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
245                    false),
246         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
247                    true),
248         RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
249                    iwl_mvm_rx_umac_scan_iter_complete_notif, false),
250
251         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
252
253         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
254                    false),
255
256         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
257         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
258                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
259         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
260         RX_HANDLER_GRP(PHY_OPS_GROUP, DTS_MEASUREMENT_NOTIF_WIDE,
261                        iwl_mvm_temp_notif, true),
262
263         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
264                    true),
265         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
266         RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
267
268 };
269 #undef RX_HANDLER
270 #undef RX_HANDLER_GRP
271 #define CMD(x) [x] = #x
272
273 static const char *const iwl_mvm_cmd_strings[REPLY_MAX + 1] = {
274         CMD(MVM_ALIVE),
275         CMD(REPLY_ERROR),
276         CMD(ECHO_CMD),
277         CMD(INIT_COMPLETE_NOTIF),
278         CMD(PHY_CONTEXT_CMD),
279         CMD(MGMT_MCAST_KEY),
280         CMD(TX_CMD),
281         CMD(TXPATH_FLUSH),
282         CMD(SHARED_MEM_CFG),
283         CMD(MAC_CONTEXT_CMD),
284         CMD(TIME_EVENT_CMD),
285         CMD(TIME_EVENT_NOTIFICATION),
286         CMD(BINDING_CONTEXT_CMD),
287         CMD(TIME_QUOTA_CMD),
288         CMD(NON_QOS_TX_COUNTER_CMD),
289         CMD(DC2DC_CONFIG_CMD),
290         CMD(NVM_ACCESS_CMD),
291         CMD(PHY_CONFIGURATION_CMD),
292         CMD(CALIB_RES_NOTIF_PHY_DB),
293         CMD(SET_CALIB_DEFAULT_CMD),
294         CMD(FW_PAGING_BLOCK_CMD),
295         CMD(ADD_STA_KEY),
296         CMD(ADD_STA),
297         CMD(FW_GET_ITEM_CMD),
298         CMD(REMOVE_STA),
299         CMD(LQ_CMD),
300         CMD(SCAN_OFFLOAD_CONFIG_CMD),
301         CMD(MATCH_FOUND_NOTIFICATION),
302         CMD(SCAN_OFFLOAD_REQUEST_CMD),
303         CMD(SCAN_OFFLOAD_ABORT_CMD),
304         CMD(HOT_SPOT_CMD),
305         CMD(SCAN_OFFLOAD_COMPLETE),
306         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
307         CMD(SCAN_ITERATION_COMPLETE),
308         CMD(POWER_TABLE_CMD),
309         CMD(WEP_KEY),
310         CMD(REPLY_RX_PHY_CMD),
311         CMD(REPLY_RX_MPDU_CMD),
312         CMD(BEACON_NOTIFICATION),
313         CMD(BEACON_TEMPLATE_CMD),
314         CMD(STATISTICS_CMD),
315         CMD(STATISTICS_NOTIFICATION),
316         CMD(EOSP_NOTIFICATION),
317         CMD(REDUCE_TX_POWER_CMD),
318         CMD(TX_ANT_CONFIGURATION_CMD),
319         CMD(D3_CONFIG_CMD),
320         CMD(D0I3_END_CMD),
321         CMD(PROT_OFFLOAD_CONFIG_CMD),
322         CMD(OFFLOADS_QUERY_CMD),
323         CMD(REMOTE_WAKE_CONFIG_CMD),
324         CMD(WOWLAN_PATTERNS),
325         CMD(WOWLAN_CONFIGURATION),
326         CMD(WOWLAN_TSC_RSC_PARAM),
327         CMD(WOWLAN_TKIP_PARAM),
328         CMD(WOWLAN_KEK_KCK_MATERIAL),
329         CMD(WOWLAN_GET_STATUSES),
330         CMD(WOWLAN_TX_POWER_PER_DB),
331         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
332         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
333         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
334         CMD(CARD_STATE_NOTIFICATION),
335         CMD(MISSED_BEACONS_NOTIFICATION),
336         CMD(BT_COEX_PRIO_TABLE),
337         CMD(BT_COEX_PROT_ENV),
338         CMD(BT_PROFILE_NOTIFICATION),
339         CMD(BT_CONFIG),
340         CMD(MCAST_FILTER_CMD),
341         CMD(BCAST_FILTER_CMD),
342         CMD(REPLY_SF_CFG_CMD),
343         CMD(REPLY_BEACON_FILTERING_CMD),
344         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
345         CMD(DTS_MEASUREMENT_NOTIFICATION),
346         CMD(REPLY_THERMAL_MNG_BACKOFF),
347         CMD(MAC_PM_POWER_TABLE),
348         CMD(LTR_CONFIG),
349         CMD(BT_COEX_CI),
350         CMD(BT_COEX_UPDATE_SW_BOOST),
351         CMD(BT_COEX_UPDATE_CORUN_LUT),
352         CMD(BT_COEX_UPDATE_REDUCED_TXP),
353         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
354         CMD(ANTENNA_COUPLING_NOTIFICATION),
355         CMD(SCD_QUEUE_CFG),
356         CMD(SCAN_CFG_CMD),
357         CMD(SCAN_REQ_UMAC),
358         CMD(SCAN_ABORT_UMAC),
359         CMD(SCAN_COMPLETE_UMAC),
360         CMD(TDLS_CHANNEL_SWITCH_CMD),
361         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
362         CMD(TDLS_CONFIG_CMD),
363         CMD(MCC_UPDATE_CMD),
364         CMD(SCAN_ITERATION_COMPLETE_UMAC),
365 };
366 #undef CMD
367
368 /* this forward declaration can avoid to export the function */
369 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
370 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
371
372 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
373 {
374         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
375
376         if (!pwr_tx_backoff)
377                 return 0;
378
379         while (pwr_tx_backoff->pwr) {
380                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
381                         return pwr_tx_backoff->backoff;
382
383                 pwr_tx_backoff++;
384         }
385
386         return 0;
387 }
388
389 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
390
391 static struct iwl_op_mode *
392 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
393                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
394 {
395         struct ieee80211_hw *hw;
396         struct iwl_op_mode *op_mode;
397         struct iwl_mvm *mvm;
398         struct iwl_trans_config trans_cfg = {};
399         static const u8 no_reclaim_cmds[] = {
400                 TX_CMD,
401         };
402         int err, scan_size;
403         u32 min_backoff;
404
405         /*
406          * We use IWL_MVM_STATION_COUNT to check the validity of the station
407          * index all over the driver - check that its value corresponds to the
408          * array size.
409          */
410         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
411
412         /********************************
413          * 1. Allocating and configuring HW data
414          ********************************/
415         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
416                                 sizeof(struct iwl_mvm),
417                                 &iwl_mvm_hw_ops);
418         if (!hw)
419                 return NULL;
420
421         if (cfg->max_rx_agg_size)
422                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
423
424         if (cfg->max_tx_agg_size)
425                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
426
427         op_mode = hw->priv;
428
429         mvm = IWL_OP_MODE_GET_MVM(op_mode);
430         mvm->dev = trans->dev;
431         mvm->trans = trans;
432         mvm->cfg = cfg;
433         mvm->fw = fw;
434         mvm->hw = hw;
435
436         if (iwl_mvm_has_new_rx_api(mvm)) {
437                 op_mode->ops = &iwl_mvm_ops_mq;
438         } else {
439                 op_mode->ops = &iwl_mvm_ops;
440
441                 if (WARN_ON(trans->num_rx_queues > 1))
442                         goto out_free;
443         }
444
445         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
446
447         mvm->aux_queue = 15;
448         mvm->first_agg_queue = 16;
449         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
450         if (mvm->cfg->base_params->num_of_queues == 16) {
451                 mvm->aux_queue = 11;
452                 mvm->first_agg_queue = 12;
453         }
454         mvm->sf_state = SF_UNINIT;
455         mvm->low_latency_agg_frame_limit = 6;
456         mvm->cur_ucode = IWL_UCODE_INIT;
457
458         mutex_init(&mvm->mutex);
459         mutex_init(&mvm->d0i3_suspend_mutex);
460         spin_lock_init(&mvm->async_handlers_lock);
461         INIT_LIST_HEAD(&mvm->time_event_list);
462         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
463         INIT_LIST_HEAD(&mvm->async_handlers_list);
464         spin_lock_init(&mvm->time_event_lock);
465         spin_lock_init(&mvm->queue_info_lock);
466
467         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
468         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
469         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
470         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
471         INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
472         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
473
474         spin_lock_init(&mvm->d0i3_tx_lock);
475         spin_lock_init(&mvm->refs_lock);
476         skb_queue_head_init(&mvm->d0i3_tx);
477         init_waitqueue_head(&mvm->d0i3_exit_waitq);
478
479         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
480
481         /*
482          * Populate the state variables that the transport layer needs
483          * to know about.
484          */
485         trans_cfg.op_mode = op_mode;
486         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
487         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
488         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
489         trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
490                                                IWL_UCODE_TLV_API_WIDE_CMD_HDR);
491
492         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
493                 trans_cfg.bc_table_dword = true;
494
495         trans_cfg.command_names = iwl_mvm_cmd_strings;
496
497         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
498         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
499         trans_cfg.scd_set_active = true;
500
501         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
502
503         /* Set a short watchdog for the command queue */
504         trans_cfg.cmd_q_wdg_timeout =
505                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
506
507         snprintf(mvm->hw->wiphy->fw_version,
508                  sizeof(mvm->hw->wiphy->fw_version),
509                  "%s", fw->fw_version);
510
511         /* Configure transport layer */
512         iwl_trans_configure(mvm->trans, &trans_cfg);
513
514         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
515         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
516         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
517         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
518         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
519                sizeof(trans->dbg_conf_tlv));
520         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
521
522         /* set up notification wait support */
523         iwl_notification_wait_init(&mvm->notif_wait);
524
525         /* Init phy db */
526         mvm->phy_db = iwl_phy_db_init(trans);
527         if (!mvm->phy_db) {
528                 IWL_ERR(mvm, "Cannot init phy_db\n");
529                 goto out_free;
530         }
531
532         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
533                  mvm->cfg->name, mvm->trans->hw_rev);
534
535         min_backoff = calc_min_backoff(trans, cfg);
536         iwl_mvm_tt_initialize(mvm, min_backoff);
537
538         if (iwlwifi_mod_params.nvm_file)
539                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
540         else
541                 IWL_DEBUG_EEPROM(mvm->trans->dev,
542                                  "working without external nvm file\n");
543
544         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
545                  "not allowing power-up and not having nvm_file\n"))
546                 goto out_free;
547
548         /*
549          * Even if nvm exists in the nvm_file driver should read again the nvm
550          * from the nic because there might be entries that exist in the OTP
551          * and not in the file.
552          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
553          */
554         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
555                 err = iwl_nvm_init(mvm, false);
556                 if (err)
557                         goto out_free;
558         } else {
559                 err = iwl_trans_start_hw(mvm->trans);
560                 if (err)
561                         goto out_free;
562
563                 mutex_lock(&mvm->mutex);
564                 err = iwl_run_init_mvm_ucode(mvm, true);
565                 if (!err || !iwlmvm_mod_params.init_dbg)
566                         iwl_trans_stop_device(trans);
567                 mutex_unlock(&mvm->mutex);
568                 /* returns 0 if successful, 1 if success but in rfkill */
569                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
570                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
571                         goto out_free;
572                 }
573         }
574
575         scan_size = iwl_mvm_scan_size(mvm);
576
577         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
578         if (!mvm->scan_cmd)
579                 goto out_free;
580
581         /* Set EBS as successful as long as not stated otherwise by the FW. */
582         mvm->last_ebs_successful = true;
583
584         err = iwl_mvm_mac_setup_register(mvm);
585         if (err)
586                 goto out_free;
587
588         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
589         if (err)
590                 goto out_unregister;
591
592         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
593
594         /* rpm starts with a taken ref. only set the appropriate bit here. */
595         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
596
597         iwl_mvm_tof_init(mvm);
598
599         return op_mode;
600
601  out_unregister:
602         ieee80211_unregister_hw(mvm->hw);
603         iwl_mvm_leds_exit(mvm);
604  out_free:
605         iwl_phy_db_free(mvm->phy_db);
606         kfree(mvm->scan_cmd);
607         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
608                 iwl_trans_op_mode_leave(trans);
609         ieee80211_free_hw(mvm->hw);
610         return NULL;
611 }
612
613 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
614 {
615         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
616         int i;
617
618         iwl_mvm_leds_exit(mvm);
619
620         iwl_mvm_tt_exit(mvm);
621
622         ieee80211_unregister_hw(mvm->hw);
623
624         kfree(mvm->scan_cmd);
625         kfree(mvm->mcast_filter_cmd);
626         mvm->mcast_filter_cmd = NULL;
627
628 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
629         kfree(mvm->d3_resume_sram);
630         if (mvm->nd_config) {
631                 kfree(mvm->nd_config->match_sets);
632                 kfree(mvm->nd_config);
633                 mvm->nd_config = NULL;
634         }
635 #endif
636
637         iwl_trans_op_mode_leave(mvm->trans);
638
639         iwl_phy_db_free(mvm->phy_db);
640         mvm->phy_db = NULL;
641
642         iwl_free_nvm_data(mvm->nvm_data);
643         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
644                 kfree(mvm->nvm_sections[i].data);
645
646         iwl_mvm_tof_clean(mvm);
647
648         ieee80211_free_hw(mvm->hw);
649 }
650
651 struct iwl_async_handler_entry {
652         struct list_head list;
653         struct iwl_rx_cmd_buffer rxb;
654         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
655 };
656
657 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
658 {
659         struct iwl_async_handler_entry *entry, *tmp;
660
661         spin_lock_bh(&mvm->async_handlers_lock);
662         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
663                 iwl_free_rxb(&entry->rxb);
664                 list_del(&entry->list);
665                 kfree(entry);
666         }
667         spin_unlock_bh(&mvm->async_handlers_lock);
668 }
669
670 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
671 {
672         struct iwl_mvm *mvm =
673                 container_of(wk, struct iwl_mvm, async_handlers_wk);
674         struct iwl_async_handler_entry *entry, *tmp;
675         struct list_head local_list;
676
677         INIT_LIST_HEAD(&local_list);
678
679         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
680         mutex_lock(&mvm->mutex);
681
682         /*
683          * Sync with Rx path with a lock. Remove all the entries from this list,
684          * add them to a local one (lock free), and then handle them.
685          */
686         spin_lock_bh(&mvm->async_handlers_lock);
687         list_splice_init(&mvm->async_handlers_list, &local_list);
688         spin_unlock_bh(&mvm->async_handlers_lock);
689
690         list_for_each_entry_safe(entry, tmp, &local_list, list) {
691                 entry->fn(mvm, &entry->rxb);
692                 iwl_free_rxb(&entry->rxb);
693                 list_del(&entry->list);
694                 kfree(entry);
695         }
696         mutex_unlock(&mvm->mutex);
697 }
698
699 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
700                                             struct iwl_rx_packet *pkt)
701 {
702         struct iwl_fw_dbg_trigger_tlv *trig;
703         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
704         int i;
705
706         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
707                 return;
708
709         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
710         cmds_trig = (void *)trig->data;
711
712         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
713                 return;
714
715         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
716                 /* don't collect on CMD 0 */
717                 if (!cmds_trig->cmds[i].cmd_id)
718                         break;
719
720                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
721                     cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
722                         continue;
723
724                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
725                                             "CMD 0x%02x.%02x received",
726                                             pkt->hdr.group_id, pkt->hdr.cmd);
727                 break;
728         }
729 }
730
731 static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
732                               struct iwl_rx_cmd_buffer *rxb,
733                               struct iwl_rx_packet *pkt)
734 {
735         int i;
736
737         iwl_mvm_rx_check_trigger(mvm, pkt);
738
739         /*
740          * Do the notification wait before RX handlers so
741          * even if the RX handler consumes the RXB we have
742          * access to it in the notification wait entry.
743          */
744         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
745
746         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
747                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
748                 struct iwl_async_handler_entry *entry;
749
750                 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
751                         continue;
752
753                 if (!rx_h->async) {
754                         rx_h->fn(mvm, rxb);
755                         return;
756                 }
757
758                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
759                 /* we can't do much... */
760                 if (!entry)
761                         return;
762
763                 entry->rxb._page = rxb_steal_page(rxb);
764                 entry->rxb._offset = rxb->_offset;
765                 entry->rxb._rx_page_order = rxb->_rx_page_order;
766                 entry->fn = rx_h->fn;
767                 spin_lock(&mvm->async_handlers_lock);
768                 list_add_tail(&entry->list, &mvm->async_handlers_list);
769                 spin_unlock(&mvm->async_handlers_lock);
770                 schedule_work(&mvm->async_handlers_wk);
771                 break;
772         }
773 }
774
775 static void iwl_mvm_rx(struct iwl_op_mode *op_mode,
776                        struct napi_struct *napi,
777                        struct iwl_rx_cmd_buffer *rxb)
778 {
779         struct iwl_rx_packet *pkt = rxb_addr(rxb);
780         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
781
782         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
783                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
784         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
785                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
786         else
787                 iwl_mvm_rx_common(mvm, rxb, pkt);
788 }
789
790 static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
791                           struct napi_struct *napi,
792                           struct iwl_rx_cmd_buffer *rxb)
793 {
794         struct iwl_rx_packet *pkt = rxb_addr(rxb);
795         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
796
797         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
798                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
799         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
800                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
801         else
802                 iwl_mvm_rx_common(mvm, rxb, pkt);
803 }
804
805 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
806 {
807         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
808         unsigned long mq;
809         int q;
810
811         spin_lock_bh(&mvm->queue_info_lock);
812         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
813         spin_unlock_bh(&mvm->queue_info_lock);
814
815         if (WARN_ON_ONCE(!mq))
816                 return;
817
818         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
819                 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[q]) > 1) {
820                         IWL_DEBUG_TX_QUEUES(mvm,
821                                             "queue %d (mac80211 %d) already stopped\n",
822                                             queue, q);
823                         continue;
824                 }
825
826                 ieee80211_stop_queue(mvm->hw, q);
827         }
828 }
829
830 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
831 {
832         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
833         unsigned long mq;
834         int q;
835
836         spin_lock_bh(&mvm->queue_info_lock);
837         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
838         spin_unlock_bh(&mvm->queue_info_lock);
839
840         if (WARN_ON_ONCE(!mq))
841                 return;
842
843         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
844                 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[q]) > 0) {
845                         IWL_DEBUG_TX_QUEUES(mvm,
846                                             "queue %d (mac80211 %d) still stopped\n",
847                                             queue, q);
848                         continue;
849                 }
850
851                 ieee80211_wake_queue(mvm->hw, q);
852         }
853 }
854
855 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
856 {
857         if (state)
858                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
859         else
860                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
861
862         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
863 }
864
865 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
866 {
867         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
868         bool calibrating = ACCESS_ONCE(mvm->calibrating);
869
870         if (state)
871                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
872         else
873                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
874
875         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
876
877         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
878         if (calibrating)
879                 iwl_abort_notification_waits(&mvm->notif_wait);
880
881         /*
882          * Stop the device if we run OPERATIONAL firmware or if we are in the
883          * middle of the calibrations.
884          */
885         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
886 }
887
888 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
889 {
890         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
891         struct ieee80211_tx_info *info;
892
893         info = IEEE80211_SKB_CB(skb);
894         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
895         ieee80211_free_txskb(mvm->hw, skb);
896 }
897
898 struct iwl_mvm_reprobe {
899         struct device *dev;
900         struct work_struct work;
901 };
902
903 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
904 {
905         struct iwl_mvm_reprobe *reprobe;
906
907         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
908         if (device_reprobe(reprobe->dev))
909                 dev_err(reprobe->dev, "reprobe failed!\n");
910         kfree(reprobe);
911         module_put(THIS_MODULE);
912 }
913
914 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
915 {
916         struct iwl_mvm *mvm =
917                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
918
919         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
920                 return;
921
922         mutex_lock(&mvm->mutex);
923
924         /* stop recording */
925         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
926                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
927         } else {
928                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
929                 /* wait before we collect the data till the DBGC stop */
930                 udelay(100);
931         }
932
933         iwl_mvm_fw_error_dump(mvm);
934
935         /* start recording again if the firmware is not crashed */
936         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
937                      mvm->fw->dbg_dest_tlv &&
938                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
939
940         mutex_unlock(&mvm->mutex);
941
942         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
943 }
944
945 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
946 {
947         iwl_abort_notification_waits(&mvm->notif_wait);
948
949         /*
950          * This is a bit racy, but worst case we tell mac80211 about
951          * a stopped/aborted scan when that was already done which
952          * is not a problem. It is necessary to abort any os scan
953          * here because mac80211 requires having the scan cleared
954          * before restarting.
955          * We'll reset the scan_status to NONE in restart cleanup in
956          * the next start() call from mac80211. If restart isn't called
957          * (no fw restart) scan status will stay busy.
958          */
959         iwl_mvm_report_scan_aborted(mvm);
960
961         /*
962          * If we're restarting already, don't cycle restarts.
963          * If INIT fw asserted, it will likely fail again.
964          * If WoWLAN fw asserted, don't restart either, mac80211
965          * can't recover this since we're already half suspended.
966          */
967         if (!mvm->restart_fw && fw_error) {
968                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
969                                             NULL);
970         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
971                                     &mvm->status)) {
972                 struct iwl_mvm_reprobe *reprobe;
973
974                 IWL_ERR(mvm,
975                         "Firmware error during reconfiguration - reprobe!\n");
976
977                 /*
978                  * get a module reference to avoid doing this while unloading
979                  * anyway and to avoid scheduling a work with code that's
980                  * being removed.
981                  */
982                 if (!try_module_get(THIS_MODULE)) {
983                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
984                         return;
985                 }
986
987                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
988                 if (!reprobe) {
989                         module_put(THIS_MODULE);
990                         return;
991                 }
992                 reprobe->dev = mvm->trans->dev;
993                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
994                 schedule_work(&reprobe->work);
995         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
996                 /* don't let the transport/FW power down */
997                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
998
999                 if (fw_error && mvm->restart_fw > 0)
1000                         mvm->restart_fw--;
1001                 ieee80211_restart_hw(mvm->hw);
1002         }
1003 }
1004
1005 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
1006 {
1007         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1008
1009         iwl_mvm_dump_nic_error_log(mvm);
1010
1011         iwl_mvm_nic_restart(mvm, true);
1012 }
1013
1014 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
1015 {
1016         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1017
1018         WARN_ON(1);
1019         iwl_mvm_nic_restart(mvm, true);
1020 }
1021
1022 struct iwl_d0i3_iter_data {
1023         struct iwl_mvm *mvm;
1024         u8 ap_sta_id;
1025         u8 vif_count;
1026         u8 offloading_tid;
1027         bool disable_offloading;
1028 };
1029
1030 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
1031                                         struct ieee80211_vif *vif,
1032                                         struct iwl_d0i3_iter_data *iter_data)
1033 {
1034         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1035         struct ieee80211_sta *ap_sta;
1036         struct iwl_mvm_sta *mvmsta;
1037         u32 available_tids = 0;
1038         u8 tid;
1039
1040         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
1041                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
1042                 return false;
1043
1044         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
1045         if (IS_ERR_OR_NULL(ap_sta))
1046                 return false;
1047
1048         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
1049         spin_lock_bh(&mvmsta->lock);
1050         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1051                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1052
1053                 /*
1054                  * in case of pending tx packets, don't use this tid
1055                  * for offloading in order to prevent reuse of the same
1056                  * qos seq counters.
1057                  */
1058                 if (iwl_mvm_tid_queued(tid_data))
1059                         continue;
1060
1061                 if (tid_data->state != IWL_AGG_OFF)
1062                         continue;
1063
1064                 available_tids |= BIT(tid);
1065         }
1066         spin_unlock_bh(&mvmsta->lock);
1067
1068         /*
1069          * disallow protocol offloading if we have no available tid
1070          * (with no pending frames and no active aggregation,
1071          * as we don't handle "holes" properly - the scheduler needs the
1072          * frame's seq number and TFD index to match)
1073          */
1074         if (!available_tids)
1075                 return true;
1076
1077         /* for simplicity, just use the first available tid */
1078         iter_data->offloading_tid = ffs(available_tids) - 1;
1079         return false;
1080 }
1081
1082 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1083                                         struct ieee80211_vif *vif)
1084 {
1085         struct iwl_d0i3_iter_data *data = _data;
1086         struct iwl_mvm *mvm = data->mvm;
1087         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1088         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1089
1090         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1091         if (vif->type != NL80211_IFTYPE_STATION ||
1092             !vif->bss_conf.assoc)
1093                 return;
1094
1095         /*
1096          * in case of pending tx packets or active aggregations,
1097          * avoid offloading features in order to prevent reuse of
1098          * the same qos seq counters.
1099          */
1100         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1101                 data->disable_offloading = true;
1102
1103         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1104         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1105
1106         /*
1107          * on init/association, mvm already configures POWER_TABLE_CMD
1108          * and REPLY_MCAST_FILTER_CMD, so currently don't
1109          * reconfigure them (we might want to use different
1110          * params later on, though).
1111          */
1112         data->ap_sta_id = mvmvif->ap_sta_id;
1113         data->vif_count++;
1114 }
1115
1116 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1117                                     struct iwl_wowlan_config_cmd *cmd,
1118                                     struct iwl_d0i3_iter_data *iter_data)
1119 {
1120         struct ieee80211_sta *ap_sta;
1121         struct iwl_mvm_sta *mvm_ap_sta;
1122
1123         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1124                 return;
1125
1126         rcu_read_lock();
1127
1128         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1129         if (IS_ERR_OR_NULL(ap_sta))
1130                 goto out;
1131
1132         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1133         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1134         cmd->offloading_tid = iter_data->offloading_tid;
1135
1136         /*
1137          * The d0i3 uCode takes care of the nonqos counters,
1138          * so configure only the qos seq ones.
1139          */
1140         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1141 out:
1142         rcu_read_unlock();
1143 }
1144
1145 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1146 {
1147         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1148         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1149         int ret;
1150         struct iwl_d0i3_iter_data d0i3_iter_data = {
1151                 .mvm = mvm,
1152         };
1153         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1154                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1155                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1156                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1157                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1158         };
1159         struct iwl_d3_manager_config d3_cfg_cmd = {
1160                 .min_sleep_time = cpu_to_le32(1000),
1161                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1162         };
1163
1164         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1165
1166         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1167
1168         /*
1169          * iwl_mvm_ref_sync takes a reference before checking the flag.
1170          * so by checking there is no held reference we prevent a state
1171          * in which iwl_mvm_ref_sync continues successfully while we
1172          * configure the firmware to enter d0i3
1173          */
1174         if (iwl_mvm_ref_taken(mvm)) {
1175                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1176                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1177                 wake_up(&mvm->d0i3_exit_waitq);
1178                 return 1;
1179         }
1180
1181         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1182                                                    IEEE80211_IFACE_ITER_NORMAL,
1183                                                    iwl_mvm_enter_d0i3_iterator,
1184                                                    &d0i3_iter_data);
1185         if (d0i3_iter_data.vif_count == 1) {
1186                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1187                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1188         } else {
1189                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1190                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1191                 mvm->d0i3_offloading = false;
1192         }
1193
1194         /* make sure we have no running tx while configuring the seqno */
1195         synchronize_net();
1196
1197         /* configure wowlan configuration only if needed */
1198         if (mvm->d0i3_ap_sta_id != IWL_MVM_STATION_COUNT) {
1199                 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd,
1200                                         &d0i3_iter_data);
1201
1202                 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1203                                            sizeof(wowlan_config_cmd),
1204                                            &wowlan_config_cmd);
1205                 if (ret)
1206                         return ret;
1207         }
1208
1209         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1210                                     flags | CMD_MAKE_TRANS_IDLE,
1211                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1212 }
1213
1214 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1215                                        struct ieee80211_vif *vif)
1216 {
1217         struct iwl_mvm *mvm = _data;
1218         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1219
1220         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1221         if (vif->type != NL80211_IFTYPE_STATION ||
1222             !vif->bss_conf.assoc)
1223                 return;
1224
1225         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1226 }
1227
1228 struct iwl_mvm_wakeup_reason_iter_data {
1229         struct iwl_mvm *mvm;
1230         u32 wakeup_reasons;
1231 };
1232
1233 static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
1234                                             struct ieee80211_vif *vif)
1235 {
1236         struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1237         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1238
1239         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1240             data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
1241                 if (data->wakeup_reasons &
1242                     IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
1243                         iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
1244                 else
1245                         ieee80211_beacon_loss(vif);
1246         }
1247 }
1248
1249 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1250 {
1251         struct ieee80211_sta *sta = NULL;
1252         struct iwl_mvm_sta *mvm_ap_sta;
1253         int i;
1254         bool wake_queues = false;
1255
1256         lockdep_assert_held(&mvm->mutex);
1257
1258         spin_lock_bh(&mvm->d0i3_tx_lock);
1259
1260         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1261                 goto out;
1262
1263         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1264
1265         /* get the sta in order to update seq numbers and re-enqueue skbs */
1266         sta = rcu_dereference_protected(
1267                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1268                         lockdep_is_held(&mvm->mutex));
1269
1270         if (IS_ERR_OR_NULL(sta)) {
1271                 sta = NULL;
1272                 goto out;
1273         }
1274
1275         if (mvm->d0i3_offloading && qos_seq) {
1276                 /* update qos seq numbers if offloading was enabled */
1277                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1278                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1279                         u16 seq = le16_to_cpu(qos_seq[i]);
1280                         /* firmware stores last-used one, we store next one */
1281                         seq += 0x10;
1282                         mvm_ap_sta->tid_data[i].seq_number = seq;
1283                 }
1284         }
1285 out:
1286         /* re-enqueue (or drop) all packets */
1287         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1288                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1289
1290                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1291                         ieee80211_free_txskb(mvm->hw, skb);
1292
1293                 /* if the skb_queue is not empty, we need to wake queues */
1294                 wake_queues = true;
1295         }
1296         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1297         wake_up(&mvm->d0i3_exit_waitq);
1298         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1299         if (wake_queues)
1300                 ieee80211_wake_queues(mvm->hw);
1301
1302         spin_unlock_bh(&mvm->d0i3_tx_lock);
1303 }
1304
1305 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1306 {
1307         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1308         struct iwl_host_cmd get_status_cmd = {
1309                 .id = WOWLAN_GET_STATUSES,
1310                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1311         };
1312         struct iwl_wowlan_status *status;
1313         int ret;
1314         u32 handled_reasons, wakeup_reasons = 0;
1315         __le16 *qos_seq = NULL;
1316
1317         mutex_lock(&mvm->mutex);
1318         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1319         if (ret)
1320                 goto out;
1321
1322         if (!get_status_cmd.resp_pkt)
1323                 goto out;
1324
1325         status = (void *)get_status_cmd.resp_pkt->data;
1326         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1327         qos_seq = status->qos_seq_ctr;
1328
1329         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1330
1331         handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1332                                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1333         if (wakeup_reasons & handled_reasons) {
1334                 struct iwl_mvm_wakeup_reason_iter_data data = {
1335                         .mvm = mvm,
1336                         .wakeup_reasons = wakeup_reasons,
1337                 };
1338
1339                 ieee80211_iterate_active_interfaces(
1340                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1341                         iwl_mvm_d0i3_wakeup_reason_iter, &data);
1342         }
1343 out:
1344         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1345
1346         IWL_DEBUG_INFO(mvm, "d0i3 exit completed (wakeup reasons: 0x%x)\n",
1347                        wakeup_reasons);
1348
1349         /* qos_seq might point inside resp_pkt, so free it only now */
1350         if (get_status_cmd.resp_pkt)
1351                 iwl_free_resp(&get_status_cmd);
1352
1353         /* the FW might have updated the regdomain */
1354         iwl_mvm_update_changed_regdom(mvm);
1355
1356         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1357         mutex_unlock(&mvm->mutex);
1358 }
1359
1360 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1361 {
1362         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1363                     CMD_WAKE_UP_TRANS;
1364         int ret;
1365
1366         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1367
1368         mutex_lock(&mvm->d0i3_suspend_mutex);
1369         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1370                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1371                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1372                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1373                 return 0;
1374         }
1375         mutex_unlock(&mvm->d0i3_suspend_mutex);
1376
1377         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1378         if (ret)
1379                 goto out;
1380
1381         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1382                                                    IEEE80211_IFACE_ITER_NORMAL,
1383                                                    iwl_mvm_exit_d0i3_iterator,
1384                                                    mvm);
1385 out:
1386         schedule_work(&mvm->d0i3_exit_work);
1387         return ret;
1388 }
1389
1390 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1391 {
1392         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1393
1394         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1395         return _iwl_mvm_exit_d0i3(mvm);
1396 }
1397
1398 #define IWL_MVM_COMMON_OPS                                      \
1399         /* these could be differentiated */                     \
1400         .queue_full = iwl_mvm_stop_sw_queue,                    \
1401         .queue_not_full = iwl_mvm_wake_sw_queue,                \
1402         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,              \
1403         .free_skb = iwl_mvm_free_skb,                           \
1404         .nic_error = iwl_mvm_nic_error,                         \
1405         .cmd_queue_full = iwl_mvm_cmd_queue_full,               \
1406         .nic_config = iwl_mvm_nic_config,                       \
1407         .enter_d0i3 = iwl_mvm_enter_d0i3,                       \
1408         .exit_d0i3 = iwl_mvm_exit_d0i3,                         \
1409         /* as we only register one, these MUST be common! */    \
1410         .start = iwl_op_mode_mvm_start,                         \
1411         .stop = iwl_op_mode_mvm_stop
1412
1413 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1414         IWL_MVM_COMMON_OPS,
1415         .rx = iwl_mvm_rx,
1416 };
1417
1418 static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
1419                               struct napi_struct *napi,
1420                               struct iwl_rx_cmd_buffer *rxb,
1421                               unsigned int queue)
1422 {
1423         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1424
1425         iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
1426 }
1427
1428 static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {
1429         IWL_MVM_COMMON_OPS,
1430         .rx = iwl_mvm_rx_mq,
1431         .rx_rss = iwl_mvm_rx_mq_rss,
1432 };