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 "time-event.h"
83 #include "iwl-fw-error-dump.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, true),
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_scan_offload_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(SCAN_ITERATION_COMPLETE),
288 CMD(POWER_TABLE_CMD),
290 CMD(REPLY_RX_PHY_CMD),
291 CMD(REPLY_RX_MPDU_CMD),
292 CMD(BEACON_NOTIFICATION),
293 CMD(BEACON_TEMPLATE_CMD),
294 CMD(STATISTICS_NOTIFICATION),
295 CMD(EOSP_NOTIFICATION),
296 CMD(REDUCE_TX_POWER_CMD),
297 CMD(TX_ANT_CONFIGURATION_CMD),
300 CMD(PROT_OFFLOAD_CONFIG_CMD),
301 CMD(OFFLOADS_QUERY_CMD),
302 CMD(REMOTE_WAKE_CONFIG_CMD),
303 CMD(WOWLAN_PATTERNS),
304 CMD(WOWLAN_CONFIGURATION),
305 CMD(WOWLAN_TSC_RSC_PARAM),
306 CMD(WOWLAN_TKIP_PARAM),
307 CMD(WOWLAN_KEK_KCK_MATERIAL),
308 CMD(WOWLAN_GET_STATUSES),
309 CMD(WOWLAN_TX_POWER_PER_DB),
310 CMD(NET_DETECT_CONFIG_CMD),
311 CMD(NET_DETECT_PROFILES_QUERY_CMD),
312 CMD(NET_DETECT_PROFILES_CMD),
313 CMD(NET_DETECT_HOTSPOTS_CMD),
314 CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
315 CMD(CARD_STATE_NOTIFICATION),
316 CMD(MISSED_BEACONS_NOTIFICATION),
317 CMD(BT_COEX_PRIO_TABLE),
318 CMD(BT_COEX_PROT_ENV),
319 CMD(BT_PROFILE_NOTIFICATION),
321 CMD(MCAST_FILTER_CMD),
322 CMD(BCAST_FILTER_CMD),
323 CMD(REPLY_SF_CFG_CMD),
324 CMD(REPLY_BEACON_FILTERING_CMD),
325 CMD(REPLY_THERMAL_MNG_BACKOFF),
326 CMD(MAC_PM_POWER_TABLE),
328 CMD(BT_COEX_UPDATE_SW_BOOST),
329 CMD(BT_COEX_UPDATE_CORUN_LUT),
330 CMD(BT_COEX_UPDATE_REDUCED_TXP),
331 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
332 CMD(ANTENNA_COUPLING_NOTIFICATION),
336 /* this forward declaration can avoid to export the function */
337 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
338 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
340 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
342 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
347 while (pwr_tx_backoff->pwr) {
348 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
349 return pwr_tx_backoff->backoff;
357 static struct iwl_op_mode *
358 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
359 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
361 struct ieee80211_hw *hw;
362 struct iwl_op_mode *op_mode;
364 struct iwl_trans_config trans_cfg = {};
365 static const u8 no_reclaim_cmds[] = {
372 * We use IWL_MVM_STATION_COUNT to check the validity of the station
373 * index all over the driver - check that its value corresponds to the
376 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
378 /********************************
379 * 1. Allocating and configuring HW data
380 ********************************/
381 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
382 sizeof(struct iwl_mvm),
388 op_mode->ops = &iwl_mvm_ops;
390 mvm = IWL_OP_MODE_GET_MVM(op_mode);
391 mvm->dev = trans->dev;
397 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
400 mvm->first_agg_queue = 16;
401 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
402 if (mvm->cfg->base_params->num_of_queues == 16) {
404 mvm->first_agg_queue = 12;
406 mvm->sf_state = SF_UNINIT;
408 mutex_init(&mvm->mutex);
409 mutex_init(&mvm->d0i3_suspend_mutex);
410 spin_lock_init(&mvm->async_handlers_lock);
411 INIT_LIST_HEAD(&mvm->time_event_list);
412 INIT_LIST_HEAD(&mvm->async_handlers_list);
413 spin_lock_init(&mvm->time_event_lock);
415 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
416 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
417 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
418 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
420 spin_lock_init(&mvm->d0i3_tx_lock);
421 skb_queue_head_init(&mvm->d0i3_tx);
422 init_waitqueue_head(&mvm->d0i3_exit_waitq);
424 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
427 * Populate the state variables that the transport layer needs
430 trans_cfg.op_mode = op_mode;
431 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
432 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
433 trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
435 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
436 trans_cfg.bc_table_dword = true;
438 if (!iwlwifi_mod_params.wd_disable)
439 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
441 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
443 trans_cfg.command_names = iwl_mvm_cmd_strings;
445 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
446 trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
448 snprintf(mvm->hw->wiphy->fw_version,
449 sizeof(mvm->hw->wiphy->fw_version),
450 "%s", fw->fw_version);
452 /* Configure transport layer */
453 iwl_trans_configure(mvm->trans, &trans_cfg);
455 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
456 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
458 /* set up notification wait support */
459 iwl_notification_wait_init(&mvm->notif_wait);
462 mvm->phy_db = iwl_phy_db_init(trans);
464 IWL_ERR(mvm, "Cannot init phy_db\n");
468 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
469 mvm->cfg->name, mvm->trans->hw_rev);
471 min_backoff = calc_min_backoff(trans, cfg);
472 iwl_mvm_tt_initialize(mvm, min_backoff);
473 /* set the nvm_file_name according to priority */
474 if (iwlwifi_mod_params.nvm_file)
475 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
477 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
479 if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
480 "not allowing power-up and not having nvm_file\n"))
484 * Even if nvm exists in the nvm_file driver should read agin the nvm
485 * from the nic because there might be entries that exist in the OTP
486 * and not in the file.
487 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
489 if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
490 err = iwl_nvm_init(mvm, false);
494 err = iwl_trans_start_hw(mvm->trans);
498 mutex_lock(&mvm->mutex);
499 err = iwl_run_init_mvm_ucode(mvm, true);
500 iwl_trans_stop_device(trans);
501 mutex_unlock(&mvm->mutex);
502 /* returns 0 if successful, 1 if success but in rfkill */
503 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
504 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
509 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
510 scan_size = sizeof(struct iwl_scan_req_unified_lmac) +
511 sizeof(struct iwl_scan_channel_cfg_lmac) *
512 mvm->fw->ucode_capa.n_scan_channels +
513 sizeof(struct iwl_scan_probe_req);
515 scan_size = sizeof(struct iwl_scan_cmd) +
516 mvm->fw->ucode_capa.max_probe_length +
517 mvm->fw->ucode_capa.n_scan_channels *
518 sizeof(struct iwl_scan_channel);
520 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
524 err = iwl_mvm_mac_setup_register(mvm);
528 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
532 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
534 /* rpm starts with a taken ref. only set the appropriate bit here. */
535 set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
540 ieee80211_unregister_hw(mvm->hw);
541 iwl_mvm_leds_exit(mvm);
543 iwl_phy_db_free(mvm->phy_db);
544 kfree(mvm->scan_cmd);
545 if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
546 iwl_trans_op_mode_leave(trans);
547 ieee80211_free_hw(mvm->hw);
551 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
553 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
556 iwl_mvm_leds_exit(mvm);
558 iwl_mvm_tt_exit(mvm);
560 ieee80211_unregister_hw(mvm->hw);
562 kfree(mvm->scan_cmd);
563 vfree(mvm->fw_error_dump);
564 kfree(mvm->mcast_filter_cmd);
565 mvm->mcast_filter_cmd = NULL;
567 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
568 kfree(mvm->d3_resume_sram);
571 iwl_trans_op_mode_leave(mvm->trans);
573 iwl_phy_db_free(mvm->phy_db);
576 iwl_free_nvm_data(mvm->nvm_data);
577 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
578 kfree(mvm->nvm_sections[i].data);
580 ieee80211_free_hw(mvm->hw);
583 struct iwl_async_handler_entry {
584 struct list_head list;
585 struct iwl_rx_cmd_buffer rxb;
586 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
587 struct iwl_device_cmd *cmd);
590 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
592 struct iwl_async_handler_entry *entry, *tmp;
594 spin_lock_bh(&mvm->async_handlers_lock);
595 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
596 iwl_free_rxb(&entry->rxb);
597 list_del(&entry->list);
600 spin_unlock_bh(&mvm->async_handlers_lock);
603 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
605 struct iwl_mvm *mvm =
606 container_of(wk, struct iwl_mvm, async_handlers_wk);
607 struct iwl_async_handler_entry *entry, *tmp;
608 struct list_head local_list;
610 INIT_LIST_HEAD(&local_list);
612 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
613 mutex_lock(&mvm->mutex);
616 * Sync with Rx path with a lock. Remove all the entries from this list,
617 * add them to a local one (lock free), and then handle them.
619 spin_lock_bh(&mvm->async_handlers_lock);
620 list_splice_init(&mvm->async_handlers_list, &local_list);
621 spin_unlock_bh(&mvm->async_handlers_lock);
623 list_for_each_entry_safe(entry, tmp, &local_list, list) {
624 if (entry->fn(mvm, &entry->rxb, NULL))
626 "returned value from ASYNC handlers are ignored\n");
627 iwl_free_rxb(&entry->rxb);
628 list_del(&entry->list);
631 mutex_unlock(&mvm->mutex);
634 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
635 struct iwl_rx_cmd_buffer *rxb,
636 struct iwl_device_cmd *cmd)
638 struct iwl_rx_packet *pkt = rxb_addr(rxb);
639 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
643 * Do the notification wait before RX handlers so
644 * even if the RX handler consumes the RXB we have
645 * access to it in the notification wait entry.
647 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
649 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
650 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
651 struct iwl_async_handler_entry *entry;
653 if (rx_h->cmd_id != pkt->hdr.cmd)
657 return rx_h->fn(mvm, rxb, cmd);
659 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
660 /* we can't do much... */
664 entry->rxb._page = rxb_steal_page(rxb);
665 entry->rxb._offset = rxb->_offset;
666 entry->rxb._rx_page_order = rxb->_rx_page_order;
667 entry->fn = rx_h->fn;
668 spin_lock(&mvm->async_handlers_lock);
669 list_add_tail(&entry->list, &mvm->async_handlers_list);
670 spin_unlock(&mvm->async_handlers_lock);
671 schedule_work(&mvm->async_handlers_wk);
678 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
680 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
681 int mq = mvm->queue_to_mac80211[queue];
683 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
686 if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
687 IWL_DEBUG_TX_QUEUES(mvm,
688 "queue %d (mac80211 %d) already stopped\n",
693 set_bit(mq, &mvm->transport_queue_stop);
694 ieee80211_stop_queue(mvm->hw, mq);
697 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
699 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
700 int mq = mvm->queue_to_mac80211[queue];
702 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
705 if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
706 IWL_DEBUG_TX_QUEUES(mvm,
707 "queue %d (mac80211 %d) already awake\n",
712 clear_bit(mq, &mvm->transport_queue_stop);
714 ieee80211_wake_queue(mvm->hw, mq);
717 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
720 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
722 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
724 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
727 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
729 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
732 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
734 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
736 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
738 return state && mvm->cur_ucode != IWL_UCODE_INIT;
741 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
743 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
744 struct ieee80211_tx_info *info;
746 info = IEEE80211_SKB_CB(skb);
747 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
748 ieee80211_free_txskb(mvm->hw, skb);
751 struct iwl_mvm_reprobe {
753 struct work_struct work;
756 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
758 struct iwl_mvm_reprobe *reprobe;
760 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
761 if (device_reprobe(reprobe->dev))
762 dev_err(reprobe->dev, "reprobe failed!\n");
764 module_put(THIS_MODULE);
767 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
769 iwl_abort_notification_waits(&mvm->notif_wait);
772 * This is a bit racy, but worst case we tell mac80211 about
773 * a stopped/aborted scan when that was already done which
774 * is not a problem. It is necessary to abort any os scan
775 * here because mac80211 requires having the scan cleared
777 * We'll reset the scan_status to NONE in restart cleanup in
778 * the next start() call from mac80211. If restart isn't called
779 * (no fw restart) scan status will stay busy.
781 switch (mvm->scan_status) {
782 case IWL_MVM_SCAN_NONE:
784 case IWL_MVM_SCAN_OS:
785 ieee80211_scan_completed(mvm->hw, true);
787 case IWL_MVM_SCAN_SCHED:
788 /* Sched scan will be restarted by mac80211 in restart_hw. */
789 if (!mvm->restart_fw)
790 ieee80211_sched_scan_stopped(mvm->hw);
795 * If we're restarting already, don't cycle restarts.
796 * If INIT fw asserted, it will likely fail again.
797 * If WoWLAN fw asserted, don't restart either, mac80211
798 * can't recover this since we're already half suspended.
800 if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
801 struct iwl_mvm_reprobe *reprobe;
804 "Firmware error during reconfiguration - reprobe!\n");
807 * get a module reference to avoid doing this while unloading
808 * anyway and to avoid scheduling a work with code that's
811 if (!try_module_get(THIS_MODULE)) {
812 IWL_ERR(mvm, "Module is being unloaded - abort\n");
816 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
818 module_put(THIS_MODULE);
821 reprobe->dev = mvm->trans->dev;
822 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
823 schedule_work(&reprobe->work);
824 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
825 /* don't let the transport/FW power down */
826 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
828 if (mvm->restart_fw > 0)
830 ieee80211_restart_hw(mvm->hw);
834 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
836 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
838 iwl_mvm_dump_nic_error_log(mvm);
840 iwl_mvm_nic_restart(mvm);
843 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
845 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
848 iwl_mvm_nic_restart(mvm);
851 struct iwl_d0i3_iter_data {
856 bool disable_offloading;
859 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
860 struct ieee80211_vif *vif,
861 struct iwl_d0i3_iter_data *iter_data)
863 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
864 struct ieee80211_sta *ap_sta;
865 struct iwl_mvm_sta *mvmsta;
866 u32 available_tids = 0;
869 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
870 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
873 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
874 if (IS_ERR_OR_NULL(ap_sta))
877 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
878 spin_lock_bh(&mvmsta->lock);
879 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
880 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
883 * in case of pending tx packets, don't use this tid
884 * for offloading in order to prevent reuse of the same
887 if (iwl_mvm_tid_queued(tid_data))
890 if (tid_data->state != IWL_AGG_OFF)
893 available_tids |= BIT(tid);
895 spin_unlock_bh(&mvmsta->lock);
898 * disallow protocol offloading if we have no available tid
899 * (with no pending frames and no active aggregation,
900 * as we don't handle "holes" properly - the scheduler needs the
901 * frame's seq number and TFD index to match)
906 /* for simplicity, just use the first available tid */
907 iter_data->offloading_tid = ffs(available_tids) - 1;
911 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
912 struct ieee80211_vif *vif)
914 struct iwl_d0i3_iter_data *data = _data;
915 struct iwl_mvm *mvm = data->mvm;
916 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
917 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
919 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
920 if (vif->type != NL80211_IFTYPE_STATION ||
921 !vif->bss_conf.assoc)
925 * in case of pending tx packets or active aggregations,
926 * avoid offloading features in order to prevent reuse of
927 * the same qos seq counters.
929 if (iwl_mvm_disallow_offloading(mvm, vif, data))
930 data->disable_offloading = true;
932 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
933 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
936 * on init/association, mvm already configures POWER_TABLE_CMD
937 * and REPLY_MCAST_FILTER_CMD, so currently don't
938 * reconfigure them (we might want to use different
939 * params later on, though).
941 data->ap_sta_id = mvmvif->ap_sta_id;
945 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
946 struct iwl_wowlan_config_cmd_v3 *cmd,
947 struct iwl_d0i3_iter_data *iter_data)
949 struct ieee80211_sta *ap_sta;
950 struct iwl_mvm_sta *mvm_ap_sta;
952 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
957 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
958 if (IS_ERR_OR_NULL(ap_sta))
961 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
962 cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
963 cmd->offloading_tid = iter_data->offloading_tid;
966 * The d0i3 uCode takes care of the nonqos counters,
967 * so configure only the qos seq ones.
969 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
973 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
975 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
976 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
978 struct iwl_d0i3_iter_data d0i3_iter_data = {
981 struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
984 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
985 IWL_WOWLAN_WAKEUP_BEACON_MISS |
986 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
987 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
990 struct iwl_d3_manager_config d3_cfg_cmd = {
991 .min_sleep_time = cpu_to_le32(1000),
994 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
996 /* make sure we have no running tx while configuring the qos */
997 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1000 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1001 IEEE80211_IFACE_ITER_NORMAL,
1002 iwl_mvm_enter_d0i3_iterator,
1004 if (d0i3_iter_data.vif_count == 1) {
1005 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1006 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1008 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1009 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1010 mvm->d0i3_offloading = false;
1013 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1014 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1015 sizeof(wowlan_config_cmd),
1016 &wowlan_config_cmd);
1020 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1021 flags | CMD_MAKE_TRANS_IDLE,
1022 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1025 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1026 struct ieee80211_vif *vif)
1028 struct iwl_mvm *mvm = _data;
1029 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1031 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1032 if (vif->type != NL80211_IFTYPE_STATION ||
1033 !vif->bss_conf.assoc)
1036 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1039 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1040 struct ieee80211_vif *vif)
1042 struct iwl_mvm *mvm = data;
1043 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1045 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1046 mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1047 ieee80211_connection_loss(vif);
1050 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1052 struct ieee80211_sta *sta = NULL;
1053 struct iwl_mvm_sta *mvm_ap_sta;
1055 bool wake_queues = false;
1057 lockdep_assert_held(&mvm->mutex);
1059 spin_lock_bh(&mvm->d0i3_tx_lock);
1061 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1064 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1066 /* get the sta in order to update seq numbers and re-enqueue skbs */
1067 sta = rcu_dereference_protected(
1068 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1069 lockdep_is_held(&mvm->mutex));
1071 if (IS_ERR_OR_NULL(sta)) {
1076 if (mvm->d0i3_offloading && qos_seq) {
1077 /* update qos seq numbers if offloading was enabled */
1078 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1079 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1080 u16 seq = le16_to_cpu(qos_seq[i]);
1081 /* firmware stores last-used one, we store next one */
1083 mvm_ap_sta->tid_data[i].seq_number = seq;
1087 /* re-enqueue (or drop) all packets */
1088 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1089 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1091 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1092 ieee80211_free_txskb(mvm->hw, skb);
1094 /* if the skb_queue is not empty, we need to wake queues */
1097 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1098 wake_up(&mvm->d0i3_exit_waitq);
1099 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1101 ieee80211_wake_queues(mvm->hw);
1103 spin_unlock_bh(&mvm->d0i3_tx_lock);
1106 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1108 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1109 struct iwl_host_cmd get_status_cmd = {
1110 .id = WOWLAN_GET_STATUSES,
1111 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1113 struct iwl_wowlan_status *status;
1115 u32 disconnection_reasons, wakeup_reasons;
1116 __le16 *qos_seq = NULL;
1118 mutex_lock(&mvm->mutex);
1119 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1123 if (!get_status_cmd.resp_pkt)
1126 status = (void *)get_status_cmd.resp_pkt->data;
1127 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1128 qos_seq = status->qos_seq_ctr;
1130 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1132 disconnection_reasons =
1133 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1134 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1135 if (wakeup_reasons & disconnection_reasons)
1136 ieee80211_iterate_active_interfaces(
1137 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1138 iwl_mvm_d0i3_disconnect_iter, mvm);
1140 iwl_free_resp(&get_status_cmd);
1142 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1143 iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1144 mutex_unlock(&mvm->mutex);
1147 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1149 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1153 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1155 mutex_lock(&mvm->d0i3_suspend_mutex);
1156 if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1157 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1158 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1159 mutex_unlock(&mvm->d0i3_suspend_mutex);
1162 mutex_unlock(&mvm->d0i3_suspend_mutex);
1164 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1168 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1169 IEEE80211_IFACE_ITER_NORMAL,
1170 iwl_mvm_exit_d0i3_iterator,
1173 schedule_work(&mvm->d0i3_exit_work);
1177 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1179 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1181 iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1182 return _iwl_mvm_exit_d0i3(mvm);
1185 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1186 struct napi_struct *napi,
1187 struct net_device *napi_dev,
1188 int (*poll)(struct napi_struct *, int),
1191 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1193 ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1196 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1197 .start = iwl_op_mode_mvm_start,
1198 .stop = iwl_op_mode_mvm_stop,
1199 .rx = iwl_mvm_rx_dispatch,
1200 .queue_full = iwl_mvm_stop_sw_queue,
1201 .queue_not_full = iwl_mvm_wake_sw_queue,
1202 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1203 .free_skb = iwl_mvm_free_skb,
1204 .nic_error = iwl_mvm_nic_error,
1205 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1206 .nic_config = iwl_mvm_nic_config,
1207 .enter_d0i3 = iwl_mvm_enter_d0i3,
1208 .exit_d0i3 = iwl_mvm_exit_d0i3,
1209 .napi_add = iwl_mvm_napi_add,