1 /******************************************************************************
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.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/module.h>
64 #include <net/mac80211.h>
66 #include "iwl-notif-wait.h"
67 #include "iwl-trans.h"
68 #include "iwl-op-mode.h"
70 #include "iwl-debug.h"
72 #include "iwl-modparams.h"
74 #include "iwl-phy-db.h"
75 #include "iwl-eeprom-parse.h"
80 #include "fw-api-scan.h"
81 #include "time-event.h"
84 * module name, copyright, version, etc.
86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
88 #define DRV_VERSION IWLWIFI_VERSION
90 MODULE_DESCRIPTION(DRV_DESCRIPTION);
91 MODULE_VERSION(DRV_VERSION);
92 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
93 MODULE_LICENSE("GPL");
95 static const struct iwl_op_mode_ops iwl_mvm_ops;
97 struct iwl_mvm_mod_params iwlmvm_mod_params = {
98 .power_scheme = IWL_POWER_SCHEME_BPS,
99 /* rest of fields are 0 by default */
102 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
103 MODULE_PARM_DESC(init_dbg,
104 "set to true to debug an ASSERT in INIT fw (default: false");
105 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
106 MODULE_PARM_DESC(power_scheme,
107 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
110 * module init and exit functions
112 static int __init iwl_mvm_init(void)
116 ret = iwl_mvm_rate_control_register();
118 pr_err("Unable to register rate control algorithm: %d\n", ret);
122 ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
125 pr_err("Unable to register MVM op_mode: %d\n", ret);
126 iwl_mvm_rate_control_unregister();
131 module_init(iwl_mvm_init);
133 static void __exit iwl_mvm_exit(void)
135 iwl_opmode_deregister("iwlmvm");
136 iwl_mvm_rate_control_unregister();
138 module_exit(iwl_mvm_exit);
140 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
142 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
143 u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
146 radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
147 FW_PHY_CFG_RADIO_TYPE_POS;
148 radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
149 FW_PHY_CFG_RADIO_STEP_POS;
150 radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
151 FW_PHY_CFG_RADIO_DASH_POS;
154 reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
155 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
156 reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
157 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
159 /* radio configuration */
160 reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
161 reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
162 reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
164 WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
165 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
168 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
170 iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
171 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
172 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
173 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
174 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
175 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
176 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
177 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
180 IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
181 radio_cfg_step, radio_cfg_dash);
184 * W/A : NIC is stuck in a reset state after Early PCIe power off
185 * (PCIe power is lost before PERST# is asserted), causing ME FW
186 * to lose ownership and not being able to obtain it back.
188 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
189 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
190 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
191 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
194 struct iwl_rx_handlers {
197 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
198 struct iwl_device_cmd *cmd);
201 #define RX_HANDLER(_cmd_id, _fn, _async) \
202 { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
205 * Handlers for fw notifications
206 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
207 * This list should be in order of frequency for performance purposes.
209 * The handler can be SYNC - this means that it will be called in the Rx path
210 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
211 * only in this case!), it should be set as ASYNC. In that case, it will be
212 * called from a worker with mvm->mutex held.
214 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
215 RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
216 RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
217 RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
218 RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
220 RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
221 RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
222 RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
223 RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
224 iwl_mvm_rx_ant_coupling_notif, true),
226 RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
228 RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
230 RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
231 RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
232 RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
233 iwl_mvm_rx_scan_offload_complete_notif, true),
234 RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_sched_scan_results,
237 RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
238 RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
240 RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
243 RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
244 RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
245 iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
248 #define CMD(x) [x] = #x
250 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
253 CMD(INIT_COMPLETE_NOTIF),
254 CMD(PHY_CONTEXT_CMD),
258 CMD(MAC_CONTEXT_CMD),
260 CMD(TIME_EVENT_NOTIFICATION),
261 CMD(BINDING_CONTEXT_CMD),
263 CMD(NON_QOS_TX_COUNTER_CMD),
264 CMD(RADIO_VERSION_NOTIFICATION),
265 CMD(SCAN_REQUEST_CMD),
267 CMD(SCAN_START_NOTIFICATION),
268 CMD(SCAN_RESULTS_NOTIFICATION),
269 CMD(SCAN_COMPLETE_NOTIFICATION),
271 CMD(PHY_CONFIGURATION_CMD),
272 CMD(CALIB_RES_NOTIF_PHY_DB),
273 CMD(SET_CALIB_DEFAULT_CMD),
274 CMD(CALIBRATION_COMPLETE_NOTIFICATION),
279 CMD(SCAN_OFFLOAD_CONFIG_CMD),
280 CMD(MATCH_FOUND_NOTIFICATION),
281 CMD(SCAN_OFFLOAD_REQUEST_CMD),
282 CMD(SCAN_OFFLOAD_ABORT_CMD),
283 CMD(SCAN_OFFLOAD_COMPLETE),
284 CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
285 CMD(POWER_TABLE_CMD),
287 CMD(REPLY_RX_PHY_CMD),
288 CMD(REPLY_RX_MPDU_CMD),
289 CMD(BEACON_NOTIFICATION),
290 CMD(BEACON_TEMPLATE_CMD),
291 CMD(STATISTICS_NOTIFICATION),
292 CMD(EOSP_NOTIFICATION),
293 CMD(REDUCE_TX_POWER_CMD),
294 CMD(TX_ANT_CONFIGURATION_CMD),
297 CMD(PROT_OFFLOAD_CONFIG_CMD),
298 CMD(OFFLOADS_QUERY_CMD),
299 CMD(REMOTE_WAKE_CONFIG_CMD),
300 CMD(WOWLAN_PATTERNS),
301 CMD(WOWLAN_CONFIGURATION),
302 CMD(WOWLAN_TSC_RSC_PARAM),
303 CMD(WOWLAN_TKIP_PARAM),
304 CMD(WOWLAN_KEK_KCK_MATERIAL),
305 CMD(WOWLAN_GET_STATUSES),
306 CMD(WOWLAN_TX_POWER_PER_DB),
307 CMD(NET_DETECT_CONFIG_CMD),
308 CMD(NET_DETECT_PROFILES_QUERY_CMD),
309 CMD(NET_DETECT_PROFILES_CMD),
310 CMD(NET_DETECT_HOTSPOTS_CMD),
311 CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
312 CMD(CARD_STATE_NOTIFICATION),
313 CMD(MISSED_BEACONS_NOTIFICATION),
314 CMD(BT_COEX_PRIO_TABLE),
315 CMD(BT_COEX_PROT_ENV),
316 CMD(BT_PROFILE_NOTIFICATION),
318 CMD(MCAST_FILTER_CMD),
319 CMD(BCAST_FILTER_CMD),
320 CMD(REPLY_SF_CFG_CMD),
321 CMD(REPLY_BEACON_FILTERING_CMD),
322 CMD(REPLY_THERMAL_MNG_BACKOFF),
323 CMD(MAC_PM_POWER_TABLE),
325 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
326 CMD(ANTENNA_COUPLING_NOTIFICATION),
330 /* this forward declaration can avoid to export the function */
331 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
332 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
334 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
336 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
341 while (pwr_tx_backoff->pwr) {
342 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
343 return pwr_tx_backoff->backoff;
351 static struct iwl_op_mode *
352 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
353 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
355 struct ieee80211_hw *hw;
356 struct iwl_op_mode *op_mode;
358 struct iwl_trans_config trans_cfg = {};
359 static const u8 no_reclaim_cmds[] = {
366 * We use IWL_MVM_STATION_COUNT to check the validity of the station
367 * index all over the driver - check that its value corresponds to the
370 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
372 /********************************
373 * 1. Allocating and configuring HW data
374 ********************************/
375 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
376 sizeof(struct iwl_mvm),
382 op_mode->ops = &iwl_mvm_ops;
384 mvm = IWL_OP_MODE_GET_MVM(op_mode);
385 mvm->dev = trans->dev;
391 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
394 mvm->first_agg_queue = 16;
395 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
396 if (mvm->cfg->base_params->num_of_queues == 16) {
398 mvm->first_agg_queue = 12;
400 mvm->sf_state = SF_UNINIT;
402 mutex_init(&mvm->mutex);
403 spin_lock_init(&mvm->async_handlers_lock);
404 INIT_LIST_HEAD(&mvm->time_event_list);
405 INIT_LIST_HEAD(&mvm->async_handlers_list);
406 spin_lock_init(&mvm->time_event_lock);
408 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
409 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
410 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
411 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
413 spin_lock_init(&mvm->d0i3_tx_lock);
414 skb_queue_head_init(&mvm->d0i3_tx);
415 init_waitqueue_head(&mvm->d0i3_exit_waitq);
417 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
420 * Populate the state variables that the transport layer needs
423 trans_cfg.op_mode = op_mode;
424 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
425 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
426 trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
428 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
429 trans_cfg.bc_table_dword = true;
431 if (!iwlwifi_mod_params.wd_disable)
432 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
434 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
436 trans_cfg.command_names = iwl_mvm_cmd_strings;
438 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
439 trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
441 snprintf(mvm->hw->wiphy->fw_version,
442 sizeof(mvm->hw->wiphy->fw_version),
443 "%s", fw->fw_version);
445 /* Configure transport layer */
446 iwl_trans_configure(mvm->trans, &trans_cfg);
448 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
449 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
451 /* set up notification wait support */
452 iwl_notification_wait_init(&mvm->notif_wait);
455 mvm->phy_db = iwl_phy_db_init(trans);
457 IWL_ERR(mvm, "Cannot init phy_db\n");
461 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
462 mvm->cfg->name, mvm->trans->hw_rev);
464 min_backoff = calc_min_backoff(trans, cfg);
465 iwl_mvm_tt_initialize(mvm, min_backoff);
468 * If the NVM exists in an external file,
469 * there is no need to unnecessarily power up the NIC at driver load
471 if (iwlwifi_mod_params.nvm_file) {
472 err = iwl_nvm_init(mvm);
476 err = iwl_trans_start_hw(mvm->trans);
480 mutex_lock(&mvm->mutex);
481 err = iwl_run_init_mvm_ucode(mvm, true);
482 iwl_trans_stop_device(trans);
483 mutex_unlock(&mvm->mutex);
484 /* returns 0 if successful, 1 if success but in rfkill */
485 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
486 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
491 scan_size = sizeof(struct iwl_scan_cmd) +
492 mvm->fw->ucode_capa.max_probe_length +
493 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
494 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
498 err = iwl_mvm_mac_setup_register(mvm);
502 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
506 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
508 /* rpm starts with a taken ref. only set the appropriate bit here. */
509 set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
514 ieee80211_unregister_hw(mvm->hw);
515 iwl_mvm_leds_exit(mvm);
517 iwl_phy_db_free(mvm->phy_db);
518 kfree(mvm->scan_cmd);
519 if (!iwlwifi_mod_params.nvm_file)
520 iwl_trans_op_mode_leave(trans);
521 ieee80211_free_hw(mvm->hw);
525 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
527 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
530 iwl_mvm_leds_exit(mvm);
532 iwl_mvm_tt_exit(mvm);
534 ieee80211_unregister_hw(mvm->hw);
536 kfree(mvm->scan_cmd);
537 kfree(mvm->mcast_filter_cmd);
538 mvm->mcast_filter_cmd = NULL;
540 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
541 kfree(mvm->d3_resume_sram);
544 iwl_trans_op_mode_leave(mvm->trans);
546 iwl_phy_db_free(mvm->phy_db);
549 iwl_free_nvm_data(mvm->nvm_data);
550 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
551 kfree(mvm->nvm_sections[i].data);
553 ieee80211_free_hw(mvm->hw);
556 struct iwl_async_handler_entry {
557 struct list_head list;
558 struct iwl_rx_cmd_buffer rxb;
559 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
560 struct iwl_device_cmd *cmd);
563 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
565 struct iwl_async_handler_entry *entry, *tmp;
567 spin_lock_bh(&mvm->async_handlers_lock);
568 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
569 iwl_free_rxb(&entry->rxb);
570 list_del(&entry->list);
573 spin_unlock_bh(&mvm->async_handlers_lock);
576 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
578 struct iwl_mvm *mvm =
579 container_of(wk, struct iwl_mvm, async_handlers_wk);
580 struct iwl_async_handler_entry *entry, *tmp;
581 struct list_head local_list;
583 INIT_LIST_HEAD(&local_list);
585 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
586 mutex_lock(&mvm->mutex);
589 * Sync with Rx path with a lock. Remove all the entries from this list,
590 * add them to a local one (lock free), and then handle them.
592 spin_lock_bh(&mvm->async_handlers_lock);
593 list_splice_init(&mvm->async_handlers_list, &local_list);
594 spin_unlock_bh(&mvm->async_handlers_lock);
596 list_for_each_entry_safe(entry, tmp, &local_list, list) {
597 if (entry->fn(mvm, &entry->rxb, NULL))
599 "returned value from ASYNC handlers are ignored\n");
600 iwl_free_rxb(&entry->rxb);
601 list_del(&entry->list);
604 mutex_unlock(&mvm->mutex);
607 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
608 struct iwl_rx_cmd_buffer *rxb,
609 struct iwl_device_cmd *cmd)
611 struct iwl_rx_packet *pkt = rxb_addr(rxb);
612 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
616 * Do the notification wait before RX handlers so
617 * even if the RX handler consumes the RXB we have
618 * access to it in the notification wait entry.
620 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
622 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
623 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
624 struct iwl_async_handler_entry *entry;
626 if (rx_h->cmd_id != pkt->hdr.cmd)
630 return rx_h->fn(mvm, rxb, cmd);
632 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
633 /* we can't do much... */
637 entry->rxb._page = rxb_steal_page(rxb);
638 entry->rxb._offset = rxb->_offset;
639 entry->rxb._rx_page_order = rxb->_rx_page_order;
640 entry->fn = rx_h->fn;
641 spin_lock(&mvm->async_handlers_lock);
642 list_add_tail(&entry->list, &mvm->async_handlers_list);
643 spin_unlock(&mvm->async_handlers_lock);
644 schedule_work(&mvm->async_handlers_wk);
651 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
653 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
654 int mq = mvm->queue_to_mac80211[queue];
656 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
659 if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
660 IWL_DEBUG_TX_QUEUES(mvm,
661 "queue %d (mac80211 %d) already stopped\n",
666 set_bit(mq, &mvm->transport_queue_stop);
667 ieee80211_stop_queue(mvm->hw, mq);
670 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
672 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
673 int mq = mvm->queue_to_mac80211[queue];
675 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
678 if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
679 IWL_DEBUG_TX_QUEUES(mvm,
680 "queue %d (mac80211 %d) already awake\n",
685 clear_bit(mq, &mvm->transport_queue_stop);
687 ieee80211_wake_queue(mvm->hw, mq);
690 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
693 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
695 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
697 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
700 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
702 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
705 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
707 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
709 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
711 return state && mvm->cur_ucode != IWL_UCODE_INIT;
714 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
716 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
717 struct ieee80211_tx_info *info;
719 info = IEEE80211_SKB_CB(skb);
720 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
721 ieee80211_free_txskb(mvm->hw, skb);
724 struct iwl_mvm_reprobe {
726 struct work_struct work;
729 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
731 struct iwl_mvm_reprobe *reprobe;
733 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
734 if (device_reprobe(reprobe->dev))
735 dev_err(reprobe->dev, "reprobe failed!\n");
737 module_put(THIS_MODULE);
740 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
742 iwl_abort_notification_waits(&mvm->notif_wait);
745 * This is a bit racy, but worst case we tell mac80211 about
746 * a stopped/aborted scan when that was already done which
747 * is not a problem. It is necessary to abort any os scan
748 * here because mac80211 requires having the scan cleared
750 * We'll reset the scan_status to NONE in restart cleanup in
751 * the next start() call from mac80211. If restart isn't called
752 * (no fw restart) scan status will stay busy.
754 switch (mvm->scan_status) {
755 case IWL_MVM_SCAN_NONE:
757 case IWL_MVM_SCAN_OS:
758 ieee80211_scan_completed(mvm->hw, true);
760 case IWL_MVM_SCAN_SCHED:
761 /* Sched scan will be restarted by mac80211 in restart_hw. */
762 if (!mvm->restart_fw)
763 ieee80211_sched_scan_stopped(mvm->hw);
768 * If we're restarting already, don't cycle restarts.
769 * If INIT fw asserted, it will likely fail again.
770 * If WoWLAN fw asserted, don't restart either, mac80211
771 * can't recover this since we're already half suspended.
773 if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
774 struct iwl_mvm_reprobe *reprobe;
777 "Firmware error during reconfiguration - reprobe!\n");
780 * get a module reference to avoid doing this while unloading
781 * anyway and to avoid scheduling a work with code that's
784 if (!try_module_get(THIS_MODULE)) {
785 IWL_ERR(mvm, "Module is being unloaded - abort\n");
789 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
791 module_put(THIS_MODULE);
794 reprobe->dev = mvm->trans->dev;
795 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
796 schedule_work(&reprobe->work);
797 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
798 /* don't let the transport/FW power down */
799 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
801 if (mvm->restart_fw > 0)
803 ieee80211_restart_hw(mvm->hw);
807 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
809 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
811 iwl_mvm_dump_nic_error_log(mvm);
812 if (!mvm->restart_fw)
813 iwl_mvm_dump_sram(mvm);
815 iwl_mvm_nic_restart(mvm);
818 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
820 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
823 iwl_mvm_nic_restart(mvm);
826 struct iwl_d0i3_iter_data {
831 bool disable_offloading;
834 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
835 struct ieee80211_vif *vif,
836 struct iwl_d0i3_iter_data *iter_data)
838 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
839 struct ieee80211_sta *ap_sta;
840 struct iwl_mvm_sta *mvmsta;
841 u32 available_tids = 0;
844 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
845 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
848 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
849 if (IS_ERR_OR_NULL(ap_sta))
852 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
853 spin_lock_bh(&mvmsta->lock);
854 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
855 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
858 * in case of pending tx packets, don't use this tid
859 * for offloading in order to prevent reuse of the same
862 if (iwl_mvm_tid_queued(tid_data))
865 if (tid_data->state != IWL_AGG_OFF)
868 available_tids |= BIT(tid);
870 spin_unlock_bh(&mvmsta->lock);
873 * disallow protocol offloading if we have no available tid
874 * (with no pending frames and no active aggregation,
875 * as we don't handle "holes" properly - the scheduler needs the
876 * frame's seq number and TFD index to match)
881 /* for simplicity, just use the first available tid */
882 iter_data->offloading_tid = ffs(available_tids) - 1;
886 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
887 struct ieee80211_vif *vif)
889 struct iwl_d0i3_iter_data *data = _data;
890 struct iwl_mvm *mvm = data->mvm;
891 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
892 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
894 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
895 if (vif->type != NL80211_IFTYPE_STATION ||
896 !vif->bss_conf.assoc)
900 * in case of pending tx packets or active aggregations,
901 * avoid offloading features in order to prevent reuse of
902 * the same qos seq counters.
904 if (iwl_mvm_disallow_offloading(mvm, vif, data))
905 data->disable_offloading = true;
907 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
908 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
911 * on init/association, mvm already configures POWER_TABLE_CMD
912 * and REPLY_MCAST_FILTER_CMD, so currently don't
913 * reconfigure them (we might want to use different
914 * params later on, though).
916 data->ap_sta_id = mvmvif->ap_sta_id;
920 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
921 struct iwl_wowlan_config_cmd_v3 *cmd,
922 struct iwl_d0i3_iter_data *iter_data)
924 struct ieee80211_sta *ap_sta;
925 struct iwl_mvm_sta *mvm_ap_sta;
927 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
932 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
933 if (IS_ERR_OR_NULL(ap_sta))
936 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
937 cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
938 cmd->offloading_tid = iter_data->offloading_tid;
941 * The d0i3 uCode takes care of the nonqos counters,
942 * so configure only the qos seq ones.
944 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
948 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
950 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
951 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
953 struct iwl_d0i3_iter_data d0i3_iter_data = {
956 struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
959 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
960 IWL_WOWLAN_WAKEUP_BEACON_MISS |
961 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
962 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
965 struct iwl_d3_manager_config d3_cfg_cmd = {
966 .min_sleep_time = cpu_to_le32(1000),
969 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
971 /* make sure we have no running tx while configuring the qos */
972 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
975 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
976 IEEE80211_IFACE_ITER_NORMAL,
977 iwl_mvm_enter_d0i3_iterator,
979 if (d0i3_iter_data.vif_count == 1) {
980 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
981 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
983 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
984 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
985 mvm->d0i3_offloading = false;
988 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
989 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
990 sizeof(wowlan_config_cmd),
995 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
996 flags | CMD_MAKE_TRANS_IDLE,
997 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1000 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1001 struct ieee80211_vif *vif)
1003 struct iwl_mvm *mvm = _data;
1004 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1006 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1007 if (vif->type != NL80211_IFTYPE_STATION ||
1008 !vif->bss_conf.assoc)
1011 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1014 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1015 struct ieee80211_vif *vif)
1017 struct iwl_mvm *mvm = data;
1018 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1020 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1021 mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1022 ieee80211_connection_loss(vif);
1025 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1027 struct ieee80211_sta *sta = NULL;
1028 struct iwl_mvm_sta *mvm_ap_sta;
1030 bool wake_queues = false;
1032 lockdep_assert_held(&mvm->mutex);
1034 spin_lock_bh(&mvm->d0i3_tx_lock);
1036 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1039 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1041 /* get the sta in order to update seq numbers and re-enqueue skbs */
1042 sta = rcu_dereference_protected(
1043 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1044 lockdep_is_held(&mvm->mutex));
1046 if (IS_ERR_OR_NULL(sta)) {
1051 if (mvm->d0i3_offloading && qos_seq) {
1052 /* update qos seq numbers if offloading was enabled */
1053 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1054 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1055 u16 seq = le16_to_cpu(qos_seq[i]);
1056 /* firmware stores last-used one, we store next one */
1058 mvm_ap_sta->tid_data[i].seq_number = seq;
1062 /* re-enqueue (or drop) all packets */
1063 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1064 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1066 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1067 ieee80211_free_txskb(mvm->hw, skb);
1069 /* if the skb_queue is not empty, we need to wake queues */
1072 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1073 wake_up(&mvm->d0i3_exit_waitq);
1074 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1076 ieee80211_wake_queues(mvm->hw);
1078 spin_unlock_bh(&mvm->d0i3_tx_lock);
1081 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1083 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1084 struct iwl_host_cmd get_status_cmd = {
1085 .id = WOWLAN_GET_STATUSES,
1086 .flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
1088 struct iwl_wowlan_status_v6 *status;
1090 u32 disconnection_reasons, wakeup_reasons;
1091 __le16 *qos_seq = NULL;
1093 mutex_lock(&mvm->mutex);
1094 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1098 if (!get_status_cmd.resp_pkt)
1101 status = (void *)get_status_cmd.resp_pkt->data;
1102 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1103 qos_seq = status->qos_seq_ctr;
1105 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1107 disconnection_reasons =
1108 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1109 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1110 if (wakeup_reasons & disconnection_reasons)
1111 ieee80211_iterate_active_interfaces(
1112 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1113 iwl_mvm_d0i3_disconnect_iter, mvm);
1115 iwl_free_resp(&get_status_cmd);
1117 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1118 mutex_unlock(&mvm->mutex);
1121 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1123 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1124 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1128 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1130 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1134 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1135 IEEE80211_IFACE_ITER_NORMAL,
1136 iwl_mvm_exit_d0i3_iterator,
1139 schedule_work(&mvm->d0i3_exit_work);
1143 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1144 .start = iwl_op_mode_mvm_start,
1145 .stop = iwl_op_mode_mvm_stop,
1146 .rx = iwl_mvm_rx_dispatch,
1147 .queue_full = iwl_mvm_stop_sw_queue,
1148 .queue_not_full = iwl_mvm_wake_sw_queue,
1149 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1150 .free_skb = iwl_mvm_free_skb,
1151 .nic_error = iwl_mvm_nic_error,
1152 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1153 .nic_config = iwl_mvm_nic_config,
1154 .enter_d0i3 = iwl_mvm_enter_d0i3,
1155 .exit_d0i3 = iwl_mvm_exit_d0i3,