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 <linux/vmalloc.h>
65 #include <net/mac80211.h>
67 #include "iwl-notif-wait.h"
68 #include "iwl-trans.h"
69 #include "iwl-op-mode.h"
71 #include "iwl-debug.h"
73 #include "iwl-modparams.h"
75 #include "iwl-phy-db.h"
76 #include "iwl-eeprom-parse.h"
81 #include "fw-api-scan.h"
82 #include "fw-error-dump.h"
83 #include "time-event.h"
86 * module name, copyright, version, etc.
88 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
90 #define DRV_VERSION IWLWIFI_VERSION
92 MODULE_DESCRIPTION(DRV_DESCRIPTION);
93 MODULE_VERSION(DRV_VERSION);
94 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
95 MODULE_LICENSE("GPL");
97 static const struct iwl_op_mode_ops iwl_mvm_ops;
99 struct iwl_mvm_mod_params iwlmvm_mod_params = {
100 .power_scheme = IWL_POWER_SCHEME_BPS,
101 /* rest of fields are 0 by default */
104 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
105 MODULE_PARM_DESC(init_dbg,
106 "set to true to debug an ASSERT in INIT fw (default: false");
107 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
108 MODULE_PARM_DESC(power_scheme,
109 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
112 * module init and exit functions
114 static int __init iwl_mvm_init(void)
118 ret = iwl_mvm_rate_control_register();
120 pr_err("Unable to register rate control algorithm: %d\n", ret);
124 ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
127 pr_err("Unable to register MVM op_mode: %d\n", ret);
128 iwl_mvm_rate_control_unregister();
133 module_init(iwl_mvm_init);
135 static void __exit iwl_mvm_exit(void)
137 iwl_opmode_deregister("iwlmvm");
138 iwl_mvm_rate_control_unregister();
140 module_exit(iwl_mvm_exit);
142 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
144 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
145 u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
148 radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
149 FW_PHY_CFG_RADIO_TYPE_POS;
150 radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
151 FW_PHY_CFG_RADIO_STEP_POS;
152 radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
153 FW_PHY_CFG_RADIO_DASH_POS;
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;
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;
166 WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
167 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
170 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
172 iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
173 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
174 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
175 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
176 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
177 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
178 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
179 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
182 IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
183 radio_cfg_step, radio_cfg_dash);
186 * W/A : NIC is stuck in a reset state after Early PCIe power off
187 * (PCIe power is lost before PERST# is asserted), causing ME FW
188 * to lose ownership and not being able to obtain it back.
190 if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
191 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
192 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
193 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
196 struct iwl_rx_handlers {
199 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
200 struct iwl_device_cmd *cmd);
203 #define RX_HANDLER(_cmd_id, _fn, _async) \
204 { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
207 * Handlers for fw notifications
208 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
209 * This list should be in order of frequency for performance purposes.
211 * The handler can be SYNC - this means that it will be called in the Rx path
212 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
213 * only in this case!), it should be set as ASYNC. In that case, it will be
214 * called from a worker with mvm->mutex held.
216 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
217 RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
218 RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
219 RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
220 RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
222 RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
223 RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
224 RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
225 RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
226 iwl_mvm_rx_ant_coupling_notif, true),
228 RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
230 RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
232 RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
233 RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
234 RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
235 iwl_mvm_rx_scan_offload_complete_notif, true),
236 RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_sched_scan_results,
239 RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
240 RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
242 RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
245 RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
246 RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
247 iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
250 #define CMD(x) [x] = #x
252 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
255 CMD(INIT_COMPLETE_NOTIF),
256 CMD(PHY_CONTEXT_CMD),
260 CMD(MAC_CONTEXT_CMD),
262 CMD(TIME_EVENT_NOTIFICATION),
263 CMD(BINDING_CONTEXT_CMD),
265 CMD(NON_QOS_TX_COUNTER_CMD),
266 CMD(RADIO_VERSION_NOTIFICATION),
267 CMD(SCAN_REQUEST_CMD),
269 CMD(SCAN_START_NOTIFICATION),
270 CMD(SCAN_RESULTS_NOTIFICATION),
271 CMD(SCAN_COMPLETE_NOTIFICATION),
273 CMD(PHY_CONFIGURATION_CMD),
274 CMD(CALIB_RES_NOTIF_PHY_DB),
275 CMD(SET_CALIB_DEFAULT_CMD),
276 CMD(CALIBRATION_COMPLETE_NOTIFICATION),
281 CMD(SCAN_OFFLOAD_CONFIG_CMD),
282 CMD(MATCH_FOUND_NOTIFICATION),
283 CMD(SCAN_OFFLOAD_REQUEST_CMD),
284 CMD(SCAN_OFFLOAD_ABORT_CMD),
285 CMD(SCAN_OFFLOAD_COMPLETE),
286 CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
287 CMD(POWER_TABLE_CMD),
289 CMD(REPLY_RX_PHY_CMD),
290 CMD(REPLY_RX_MPDU_CMD),
291 CMD(BEACON_NOTIFICATION),
292 CMD(BEACON_TEMPLATE_CMD),
293 CMD(STATISTICS_NOTIFICATION),
294 CMD(EOSP_NOTIFICATION),
295 CMD(REDUCE_TX_POWER_CMD),
296 CMD(TX_ANT_CONFIGURATION_CMD),
299 CMD(PROT_OFFLOAD_CONFIG_CMD),
300 CMD(OFFLOADS_QUERY_CMD),
301 CMD(REMOTE_WAKE_CONFIG_CMD),
302 CMD(WOWLAN_PATTERNS),
303 CMD(WOWLAN_CONFIGURATION),
304 CMD(WOWLAN_TSC_RSC_PARAM),
305 CMD(WOWLAN_TKIP_PARAM),
306 CMD(WOWLAN_KEK_KCK_MATERIAL),
307 CMD(WOWLAN_GET_STATUSES),
308 CMD(WOWLAN_TX_POWER_PER_DB),
309 CMD(NET_DETECT_CONFIG_CMD),
310 CMD(NET_DETECT_PROFILES_QUERY_CMD),
311 CMD(NET_DETECT_PROFILES_CMD),
312 CMD(NET_DETECT_HOTSPOTS_CMD),
313 CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
314 CMD(CARD_STATE_NOTIFICATION),
315 CMD(MISSED_BEACONS_NOTIFICATION),
316 CMD(BT_COEX_PRIO_TABLE),
317 CMD(BT_COEX_PROT_ENV),
318 CMD(BT_PROFILE_NOTIFICATION),
320 CMD(MCAST_FILTER_CMD),
321 CMD(BCAST_FILTER_CMD),
322 CMD(REPLY_SF_CFG_CMD),
323 CMD(REPLY_BEACON_FILTERING_CMD),
324 CMD(REPLY_THERMAL_MNG_BACKOFF),
325 CMD(MAC_PM_POWER_TABLE),
327 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
328 CMD(ANTENNA_COUPLING_NOTIFICATION),
332 /* this forward declaration can avoid to export the function */
333 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
334 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
336 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
338 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
343 while (pwr_tx_backoff->pwr) {
344 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
345 return pwr_tx_backoff->backoff;
353 static struct iwl_op_mode *
354 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
355 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
357 struct ieee80211_hw *hw;
358 struct iwl_op_mode *op_mode;
360 struct iwl_trans_config trans_cfg = {};
361 static const u8 no_reclaim_cmds[] = {
368 * We use IWL_MVM_STATION_COUNT to check the validity of the station
369 * index all over the driver - check that its value corresponds to the
372 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
374 /********************************
375 * 1. Allocating and configuring HW data
376 ********************************/
377 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
378 sizeof(struct iwl_mvm),
384 op_mode->ops = &iwl_mvm_ops;
386 mvm = IWL_OP_MODE_GET_MVM(op_mode);
387 mvm->dev = trans->dev;
393 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
396 mvm->first_agg_queue = 16;
397 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
398 if (mvm->cfg->base_params->num_of_queues == 16) {
400 mvm->first_agg_queue = 12;
402 mvm->sf_state = SF_UNINIT;
404 mutex_init(&mvm->mutex);
405 spin_lock_init(&mvm->async_handlers_lock);
406 INIT_LIST_HEAD(&mvm->time_event_list);
407 INIT_LIST_HEAD(&mvm->async_handlers_list);
408 spin_lock_init(&mvm->time_event_lock);
410 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
411 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
412 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
413 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
415 spin_lock_init(&mvm->d0i3_tx_lock);
416 skb_queue_head_init(&mvm->d0i3_tx);
417 init_waitqueue_head(&mvm->d0i3_exit_waitq);
419 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
422 * Populate the state variables that the transport layer needs
425 trans_cfg.op_mode = op_mode;
426 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
427 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
428 trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
430 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
431 trans_cfg.bc_table_dword = true;
433 if (!iwlwifi_mod_params.wd_disable)
434 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
436 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
438 trans_cfg.command_names = iwl_mvm_cmd_strings;
440 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
441 trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
443 snprintf(mvm->hw->wiphy->fw_version,
444 sizeof(mvm->hw->wiphy->fw_version),
445 "%s", fw->fw_version);
447 /* Configure transport layer */
448 iwl_trans_configure(mvm->trans, &trans_cfg);
450 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
451 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
453 /* set up notification wait support */
454 iwl_notification_wait_init(&mvm->notif_wait);
457 mvm->phy_db = iwl_phy_db_init(trans);
459 IWL_ERR(mvm, "Cannot init phy_db\n");
463 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
464 mvm->cfg->name, mvm->trans->hw_rev);
466 min_backoff = calc_min_backoff(trans, cfg);
467 iwl_mvm_tt_initialize(mvm, min_backoff);
470 * If the NVM exists in an external file,
471 * there is no need to unnecessarily power up the NIC at driver load
473 if (iwlwifi_mod_params.nvm_file) {
474 err = iwl_nvm_init(mvm);
478 err = iwl_trans_start_hw(mvm->trans);
482 mutex_lock(&mvm->mutex);
483 err = iwl_run_init_mvm_ucode(mvm, true);
484 iwl_trans_stop_device(trans);
485 mutex_unlock(&mvm->mutex);
486 /* returns 0 if successful, 1 if success but in rfkill */
487 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
488 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
493 scan_size = sizeof(struct iwl_scan_cmd) +
494 mvm->fw->ucode_capa.max_probe_length +
495 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
496 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
500 err = iwl_mvm_mac_setup_register(mvm);
504 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
508 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
510 /* rpm starts with a taken ref. only set the appropriate bit here. */
511 set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
516 ieee80211_unregister_hw(mvm->hw);
517 iwl_mvm_leds_exit(mvm);
519 iwl_phy_db_free(mvm->phy_db);
520 kfree(mvm->scan_cmd);
521 if (!iwlwifi_mod_params.nvm_file)
522 iwl_trans_op_mode_leave(trans);
523 ieee80211_free_hw(mvm->hw);
527 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
529 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
532 iwl_mvm_leds_exit(mvm);
534 iwl_mvm_tt_exit(mvm);
536 ieee80211_unregister_hw(mvm->hw);
538 kfree(mvm->scan_cmd);
539 vfree(mvm->fw_error_dump);
540 kfree(mvm->fw_error_sram);
541 kfree(mvm->mcast_filter_cmd);
542 mvm->mcast_filter_cmd = NULL;
544 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
545 kfree(mvm->d3_resume_sram);
548 iwl_trans_op_mode_leave(mvm->trans);
550 iwl_phy_db_free(mvm->phy_db);
553 iwl_free_nvm_data(mvm->nvm_data);
554 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
555 kfree(mvm->nvm_sections[i].data);
557 ieee80211_free_hw(mvm->hw);
560 struct iwl_async_handler_entry {
561 struct list_head list;
562 struct iwl_rx_cmd_buffer rxb;
563 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
564 struct iwl_device_cmd *cmd);
567 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
569 struct iwl_async_handler_entry *entry, *tmp;
571 spin_lock_bh(&mvm->async_handlers_lock);
572 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
573 iwl_free_rxb(&entry->rxb);
574 list_del(&entry->list);
577 spin_unlock_bh(&mvm->async_handlers_lock);
580 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
582 struct iwl_mvm *mvm =
583 container_of(wk, struct iwl_mvm, async_handlers_wk);
584 struct iwl_async_handler_entry *entry, *tmp;
585 struct list_head local_list;
587 INIT_LIST_HEAD(&local_list);
589 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
590 mutex_lock(&mvm->mutex);
593 * Sync with Rx path with a lock. Remove all the entries from this list,
594 * add them to a local one (lock free), and then handle them.
596 spin_lock_bh(&mvm->async_handlers_lock);
597 list_splice_init(&mvm->async_handlers_list, &local_list);
598 spin_unlock_bh(&mvm->async_handlers_lock);
600 list_for_each_entry_safe(entry, tmp, &local_list, list) {
601 if (entry->fn(mvm, &entry->rxb, NULL))
603 "returned value from ASYNC handlers are ignored\n");
604 iwl_free_rxb(&entry->rxb);
605 list_del(&entry->list);
608 mutex_unlock(&mvm->mutex);
611 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
612 struct iwl_rx_cmd_buffer *rxb,
613 struct iwl_device_cmd *cmd)
615 struct iwl_rx_packet *pkt = rxb_addr(rxb);
616 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
620 * Do the notification wait before RX handlers so
621 * even if the RX handler consumes the RXB we have
622 * access to it in the notification wait entry.
624 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
626 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
627 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
628 struct iwl_async_handler_entry *entry;
630 if (rx_h->cmd_id != pkt->hdr.cmd)
634 return rx_h->fn(mvm, rxb, cmd);
636 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
637 /* we can't do much... */
641 entry->rxb._page = rxb_steal_page(rxb);
642 entry->rxb._offset = rxb->_offset;
643 entry->rxb._rx_page_order = rxb->_rx_page_order;
644 entry->fn = rx_h->fn;
645 spin_lock(&mvm->async_handlers_lock);
646 list_add_tail(&entry->list, &mvm->async_handlers_list);
647 spin_unlock(&mvm->async_handlers_lock);
648 schedule_work(&mvm->async_handlers_wk);
655 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
657 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
658 int mq = mvm->queue_to_mac80211[queue];
660 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
663 if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
664 IWL_DEBUG_TX_QUEUES(mvm,
665 "queue %d (mac80211 %d) already stopped\n",
670 set_bit(mq, &mvm->transport_queue_stop);
671 ieee80211_stop_queue(mvm->hw, mq);
674 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
676 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
677 int mq = mvm->queue_to_mac80211[queue];
679 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
682 if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
683 IWL_DEBUG_TX_QUEUES(mvm,
684 "queue %d (mac80211 %d) already awake\n",
689 clear_bit(mq, &mvm->transport_queue_stop);
691 ieee80211_wake_queue(mvm->hw, mq);
694 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
697 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
699 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
701 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
704 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
706 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
709 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
711 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
713 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
715 return state && mvm->cur_ucode != IWL_UCODE_INIT;
718 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
720 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
721 struct ieee80211_tx_info *info;
723 info = IEEE80211_SKB_CB(skb);
724 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
725 ieee80211_free_txskb(mvm->hw, skb);
728 struct iwl_mvm_reprobe {
730 struct work_struct work;
733 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
735 struct iwl_mvm_reprobe *reprobe;
737 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
738 if (device_reprobe(reprobe->dev))
739 dev_err(reprobe->dev, "reprobe failed!\n");
741 module_put(THIS_MODULE);
744 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
746 iwl_abort_notification_waits(&mvm->notif_wait);
749 * This is a bit racy, but worst case we tell mac80211 about
750 * a stopped/aborted scan when that was already done which
751 * is not a problem. It is necessary to abort any os scan
752 * here because mac80211 requires having the scan cleared
754 * We'll reset the scan_status to NONE in restart cleanup in
755 * the next start() call from mac80211. If restart isn't called
756 * (no fw restart) scan status will stay busy.
758 switch (mvm->scan_status) {
759 case IWL_MVM_SCAN_NONE:
761 case IWL_MVM_SCAN_OS:
762 ieee80211_scan_completed(mvm->hw, true);
764 case IWL_MVM_SCAN_SCHED:
765 /* Sched scan will be restarted by mac80211 in restart_hw. */
766 if (!mvm->restart_fw)
767 ieee80211_sched_scan_stopped(mvm->hw);
772 * If we're restarting already, don't cycle restarts.
773 * If INIT fw asserted, it will likely fail again.
774 * If WoWLAN fw asserted, don't restart either, mac80211
775 * can't recover this since we're already half suspended.
777 if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
778 struct iwl_mvm_reprobe *reprobe;
781 "Firmware error during reconfiguration - reprobe!\n");
784 * get a module reference to avoid doing this while unloading
785 * anyway and to avoid scheduling a work with code that's
788 if (!try_module_get(THIS_MODULE)) {
789 IWL_ERR(mvm, "Module is being unloaded - abort\n");
793 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
795 module_put(THIS_MODULE);
798 reprobe->dev = mvm->trans->dev;
799 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
800 schedule_work(&reprobe->work);
801 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
802 /* don't let the transport/FW power down */
803 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
805 if (mvm->restart_fw > 0)
807 ieee80211_restart_hw(mvm->hw);
811 #ifdef CONFIG_IWLWIFI_DEBUGFS
812 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
814 struct iwl_fw_error_dump_file *dump_file;
815 struct iwl_fw_error_dump_data *dump_data;
818 lockdep_assert_held(&mvm->mutex);
820 if (mvm->fw_error_dump)
823 file_len = mvm->fw_error_sram_len +
827 dump_file = vmalloc(file_len);
831 mvm->fw_error_dump = dump_file;
833 dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
834 dump_file->file_len = cpu_to_le32(file_len);
835 dump_data = (void *)dump_file->data;
836 dump_data->type = IWL_FW_ERROR_DUMP_SRAM;
837 dump_data->len = cpu_to_le32(mvm->fw_error_sram_len);
840 * No need for lock since at the stage the FW isn't loaded. So it
841 * can't assert - we are the only one who can possibly be accessing
842 * mvm->fw_error_sram right now.
844 memcpy(dump_data->data, mvm->fw_error_sram, mvm->fw_error_sram_len);
848 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
850 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
852 iwl_mvm_dump_nic_error_log(mvm);
854 #ifdef CONFIG_IWLWIFI_DEBUGFS
855 iwl_mvm_fw_error_sram_dump(mvm);
858 iwl_mvm_nic_restart(mvm);
861 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
863 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
866 iwl_mvm_nic_restart(mvm);
869 struct iwl_d0i3_iter_data {
874 bool disable_offloading;
877 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
878 struct ieee80211_vif *vif,
879 struct iwl_d0i3_iter_data *iter_data)
881 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
882 struct ieee80211_sta *ap_sta;
883 struct iwl_mvm_sta *mvmsta;
884 u32 available_tids = 0;
887 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
888 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
891 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
892 if (IS_ERR_OR_NULL(ap_sta))
895 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
896 spin_lock_bh(&mvmsta->lock);
897 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
898 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
901 * in case of pending tx packets, don't use this tid
902 * for offloading in order to prevent reuse of the same
905 if (iwl_mvm_tid_queued(tid_data))
908 if (tid_data->state != IWL_AGG_OFF)
911 available_tids |= BIT(tid);
913 spin_unlock_bh(&mvmsta->lock);
916 * disallow protocol offloading if we have no available tid
917 * (with no pending frames and no active aggregation,
918 * as we don't handle "holes" properly - the scheduler needs the
919 * frame's seq number and TFD index to match)
924 /* for simplicity, just use the first available tid */
925 iter_data->offloading_tid = ffs(available_tids) - 1;
929 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
930 struct ieee80211_vif *vif)
932 struct iwl_d0i3_iter_data *data = _data;
933 struct iwl_mvm *mvm = data->mvm;
934 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
935 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
937 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
938 if (vif->type != NL80211_IFTYPE_STATION ||
939 !vif->bss_conf.assoc)
943 * in case of pending tx packets or active aggregations,
944 * avoid offloading features in order to prevent reuse of
945 * the same qos seq counters.
947 if (iwl_mvm_disallow_offloading(mvm, vif, data))
948 data->disable_offloading = true;
950 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
951 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
954 * on init/association, mvm already configures POWER_TABLE_CMD
955 * and REPLY_MCAST_FILTER_CMD, so currently don't
956 * reconfigure them (we might want to use different
957 * params later on, though).
959 data->ap_sta_id = mvmvif->ap_sta_id;
963 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
964 struct iwl_wowlan_config_cmd_v3 *cmd,
965 struct iwl_d0i3_iter_data *iter_data)
967 struct ieee80211_sta *ap_sta;
968 struct iwl_mvm_sta *mvm_ap_sta;
970 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
975 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
976 if (IS_ERR_OR_NULL(ap_sta))
979 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
980 cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
981 cmd->offloading_tid = iter_data->offloading_tid;
984 * The d0i3 uCode takes care of the nonqos counters,
985 * so configure only the qos seq ones.
987 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
991 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
993 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
994 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
996 struct iwl_d0i3_iter_data d0i3_iter_data = {
999 struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1002 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1003 IWL_WOWLAN_WAKEUP_BEACON_MISS |
1004 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1005 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1008 struct iwl_d3_manager_config d3_cfg_cmd = {
1009 .min_sleep_time = cpu_to_le32(1000),
1012 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1014 /* make sure we have no running tx while configuring the qos */
1015 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1018 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1019 IEEE80211_IFACE_ITER_NORMAL,
1020 iwl_mvm_enter_d0i3_iterator,
1022 if (d0i3_iter_data.vif_count == 1) {
1023 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1024 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1026 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1027 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1028 mvm->d0i3_offloading = false;
1031 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1032 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1033 sizeof(wowlan_config_cmd),
1034 &wowlan_config_cmd);
1038 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1039 flags | CMD_MAKE_TRANS_IDLE,
1040 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1043 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1044 struct ieee80211_vif *vif)
1046 struct iwl_mvm *mvm = _data;
1047 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1049 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1050 if (vif->type != NL80211_IFTYPE_STATION ||
1051 !vif->bss_conf.assoc)
1054 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1057 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1058 struct ieee80211_vif *vif)
1060 struct iwl_mvm *mvm = data;
1061 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1063 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1064 mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1065 ieee80211_connection_loss(vif);
1068 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1070 struct ieee80211_sta *sta = NULL;
1071 struct iwl_mvm_sta *mvm_ap_sta;
1073 bool wake_queues = false;
1075 lockdep_assert_held(&mvm->mutex);
1077 spin_lock_bh(&mvm->d0i3_tx_lock);
1079 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1082 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1084 /* get the sta in order to update seq numbers and re-enqueue skbs */
1085 sta = rcu_dereference_protected(
1086 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1087 lockdep_is_held(&mvm->mutex));
1089 if (IS_ERR_OR_NULL(sta)) {
1094 if (mvm->d0i3_offloading && qos_seq) {
1095 /* update qos seq numbers if offloading was enabled */
1096 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1097 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1098 u16 seq = le16_to_cpu(qos_seq[i]);
1099 /* firmware stores last-used one, we store next one */
1101 mvm_ap_sta->tid_data[i].seq_number = seq;
1105 /* re-enqueue (or drop) all packets */
1106 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1107 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1109 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1110 ieee80211_free_txskb(mvm->hw, skb);
1112 /* if the skb_queue is not empty, we need to wake queues */
1115 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1116 wake_up(&mvm->d0i3_exit_waitq);
1117 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1119 ieee80211_wake_queues(mvm->hw);
1121 spin_unlock_bh(&mvm->d0i3_tx_lock);
1124 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1126 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1127 struct iwl_host_cmd get_status_cmd = {
1128 .id = WOWLAN_GET_STATUSES,
1129 .flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
1131 struct iwl_wowlan_status_v6 *status;
1133 u32 disconnection_reasons, wakeup_reasons;
1134 __le16 *qos_seq = NULL;
1136 mutex_lock(&mvm->mutex);
1137 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1141 if (!get_status_cmd.resp_pkt)
1144 status = (void *)get_status_cmd.resp_pkt->data;
1145 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1146 qos_seq = status->qos_seq_ctr;
1148 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1150 disconnection_reasons =
1151 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1152 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1153 if (wakeup_reasons & disconnection_reasons)
1154 ieee80211_iterate_active_interfaces(
1155 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1156 iwl_mvm_d0i3_disconnect_iter, mvm);
1158 iwl_free_resp(&get_status_cmd);
1160 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1161 mutex_unlock(&mvm->mutex);
1164 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1166 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1167 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1171 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1173 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1177 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1178 IEEE80211_IFACE_ITER_NORMAL,
1179 iwl_mvm_exit_d0i3_iterator,
1182 schedule_work(&mvm->d0i3_exit_work);
1186 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1187 struct napi_struct *napi,
1188 struct net_device *napi_dev,
1189 int (*poll)(struct napi_struct *, int),
1192 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1194 ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1197 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1198 .start = iwl_op_mode_mvm_start,
1199 .stop = iwl_op_mode_mvm_stop,
1200 .rx = iwl_mvm_rx_dispatch,
1201 .queue_full = iwl_mvm_stop_sw_queue,
1202 .queue_not_full = iwl_mvm_wake_sw_queue,
1203 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1204 .free_skb = iwl_mvm_free_skb,
1205 .nic_error = iwl_mvm_nic_error,
1206 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1207 .nic_config = iwl_mvm_nic_config,
1208 .enter_d0i3 = iwl_mvm_enter_d0i3,
1209 .exit_d0i3 = iwl_mvm_exit_d0i3,
1210 .napi_add = iwl_mvm_napi_add,