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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
8 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
9 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 25 | * in the file called COPYING. |
8ca151b5 JB |
26 | * |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
33 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
34 | * All rights reserved. | |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
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 | |
45 | * distribution. | |
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. | |
49 | * | |
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. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | #include <linux/module.h> | |
64 | #include <net/mac80211.h> | |
65 | ||
66 | #include "iwl-notif-wait.h" | |
67 | #include "iwl-trans.h" | |
68 | #include "iwl-op-mode.h" | |
69 | #include "iwl-fw.h" | |
70 | #include "iwl-debug.h" | |
71 | #include "iwl-drv.h" | |
72 | #include "iwl-modparams.h" | |
73 | #include "mvm.h" | |
74 | #include "iwl-phy-db.h" | |
75 | #include "iwl-eeprom-parse.h" | |
76 | #include "iwl-csr.h" | |
77 | #include "iwl-io.h" | |
78 | #include "iwl-prph.h" | |
79 | #include "rs.h" | |
80 | #include "fw-api-scan.h" | |
81 | #include "time-event.h" | |
82 | ||
83 | /* | |
84 | * module name, copyright, version, etc. | |
85 | */ | |
86 | #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux" | |
87 | ||
88 | #define DRV_VERSION IWLWIFI_VERSION | |
89 | ||
90 | MODULE_DESCRIPTION(DRV_DESCRIPTION); | |
91 | MODULE_VERSION(DRV_VERSION); | |
92 | MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); | |
93 | MODULE_LICENSE("GPL"); | |
94 | ||
95 | static const struct iwl_op_mode_ops iwl_mvm_ops; | |
96 | ||
97 | struct iwl_mvm_mod_params iwlmvm_mod_params = { | |
98 | .power_scheme = IWL_POWER_SCHEME_BPS, | |
99 | /* rest of fields are 0 by default */ | |
100 | }; | |
101 | ||
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"); | |
108 | ||
109 | /* | |
110 | * module init and exit functions | |
111 | */ | |
112 | static int __init iwl_mvm_init(void) | |
113 | { | |
114 | int ret; | |
115 | ||
116 | ret = iwl_mvm_rate_control_register(); | |
117 | if (ret) { | |
118 | pr_err("Unable to register rate control algorithm: %d\n", ret); | |
119 | return ret; | |
120 | } | |
121 | ||
122 | ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops); | |
123 | ||
124 | if (ret) { | |
125 | pr_err("Unable to register MVM op_mode: %d\n", ret); | |
126 | iwl_mvm_rate_control_unregister(); | |
127 | } | |
128 | ||
129 | return ret; | |
130 | } | |
131 | module_init(iwl_mvm_init); | |
132 | ||
133 | static void __exit iwl_mvm_exit(void) | |
134 | { | |
135 | iwl_opmode_deregister("iwlmvm"); | |
136 | iwl_mvm_rate_control_unregister(); | |
137 | } | |
138 | module_exit(iwl_mvm_exit); | |
139 | ||
140 | static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode) | |
141 | { | |
142 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
143 | u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash; | |
144 | u32 reg_val = 0; | |
145 | ||
d110cb51 EG |
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; | |
8ca151b5 JB |
152 | |
153 | /* SKU control */ | |
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; | |
158 | ||
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; | |
163 | ||
164 | WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) & | |
165 | ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE); | |
166 | ||
167 | /* silicon bits */ | |
168 | reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI; | |
8ca151b5 | 169 | |
e139dc4a LE |
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, | |
178 | reg_val); | |
8ca151b5 JB |
179 | |
180 | IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type, | |
181 | radio_cfg_step, radio_cfg_dash); | |
182 | ||
183 | /* | |
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. | |
187 | */ | |
188 | iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG, | |
189 | APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS, | |
190 | ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS); | |
191 | } | |
192 | ||
193 | struct iwl_rx_handlers { | |
194 | u8 cmd_id; | |
195 | bool async; | |
196 | int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
197 | struct iwl_device_cmd *cmd); | |
198 | }; | |
199 | ||
200 | #define RX_HANDLER(_cmd_id, _fn, _async) \ | |
201 | { .cmd_id = _cmd_id , .fn = _fn , .async = _async } | |
202 | ||
203 | /* | |
204 | * Handlers for fw notifications | |
205 | * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME | |
206 | * This list should be in order of frequency for performance purposes. | |
207 | * | |
208 | * The handler can be SYNC - this means that it will be called in the Rx path | |
209 | * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and | |
210 | * only in this case!), it should be set as ASYNC. In that case, it will be | |
211 | * called from a worker with mvm->mutex held. | |
212 | */ | |
213 | static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = { | |
214 | RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false), | |
215 | RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false), | |
216 | RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false), | |
217 | RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false), | |
218 | RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false), | |
219 | ||
220 | RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false), | |
221 | RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, false), | |
222 | ||
f421f9c3 | 223 | RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true), |
571765c8 | 224 | RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false), |
f421f9c3 | 225 | |
8ca151b5 JB |
226 | RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false), |
227 | RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false), | |
228 | ||
229 | RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false), | |
230 | }; | |
231 | #undef RX_HANDLER | |
232 | #define CMD(x) [x] = #x | |
233 | ||
234 | static const char *iwl_mvm_cmd_strings[REPLY_MAX] = { | |
235 | CMD(MVM_ALIVE), | |
236 | CMD(REPLY_ERROR), | |
237 | CMD(INIT_COMPLETE_NOTIF), | |
238 | CMD(PHY_CONTEXT_CMD), | |
239 | CMD(MGMT_MCAST_KEY), | |
240 | CMD(TX_CMD), | |
241 | CMD(TXPATH_FLUSH), | |
242 | CMD(MAC_CONTEXT_CMD), | |
243 | CMD(TIME_EVENT_CMD), | |
244 | CMD(TIME_EVENT_NOTIFICATION), | |
245 | CMD(BINDING_CONTEXT_CMD), | |
246 | CMD(TIME_QUOTA_CMD), | |
247 | CMD(RADIO_VERSION_NOTIFICATION), | |
248 | CMD(SCAN_REQUEST_CMD), | |
249 | CMD(SCAN_ABORT_CMD), | |
250 | CMD(SCAN_START_NOTIFICATION), | |
251 | CMD(SCAN_RESULTS_NOTIFICATION), | |
252 | CMD(SCAN_COMPLETE_NOTIFICATION), | |
253 | CMD(NVM_ACCESS_CMD), | |
254 | CMD(PHY_CONFIGURATION_CMD), | |
255 | CMD(CALIB_RES_NOTIF_PHY_DB), | |
256 | CMD(SET_CALIB_DEFAULT_CMD), | |
257 | CMD(CALIBRATION_COMPLETE_NOTIFICATION), | |
258 | CMD(ADD_STA), | |
259 | CMD(REMOVE_STA), | |
260 | CMD(LQ_CMD), | |
261 | CMD(SCAN_OFFLOAD_CONFIG_CMD), | |
262 | CMD(SCAN_OFFLOAD_REQUEST_CMD), | |
263 | CMD(SCAN_OFFLOAD_ABORT_CMD), | |
264 | CMD(SCAN_OFFLOAD_COMPLETE), | |
265 | CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD), | |
266 | CMD(POWER_TABLE_CMD), | |
267 | CMD(WEP_KEY), | |
268 | CMD(REPLY_RX_PHY_CMD), | |
269 | CMD(REPLY_RX_MPDU_CMD), | |
571765c8 | 270 | CMD(BEACON_NOTIFICATION), |
8ca151b5 JB |
271 | CMD(BEACON_TEMPLATE_CMD), |
272 | CMD(STATISTICS_NOTIFICATION), | |
273 | CMD(TX_ANT_CONFIGURATION_CMD), | |
274 | CMD(D3_CONFIG_CMD), | |
275 | CMD(PROT_OFFLOAD_CONFIG_CMD), | |
276 | CMD(OFFLOADS_QUERY_CMD), | |
277 | CMD(REMOTE_WAKE_CONFIG_CMD), | |
278 | CMD(WOWLAN_PATTERNS), | |
279 | CMD(WOWLAN_CONFIGURATION), | |
280 | CMD(WOWLAN_TSC_RSC_PARAM), | |
281 | CMD(WOWLAN_TKIP_PARAM), | |
282 | CMD(WOWLAN_KEK_KCK_MATERIAL), | |
283 | CMD(WOWLAN_GET_STATUSES), | |
284 | CMD(WOWLAN_TX_POWER_PER_DB), | |
285 | CMD(NET_DETECT_CONFIG_CMD), | |
286 | CMD(NET_DETECT_PROFILES_QUERY_CMD), | |
287 | CMD(NET_DETECT_PROFILES_CMD), | |
288 | CMD(NET_DETECT_HOTSPOTS_CMD), | |
289 | CMD(NET_DETECT_HOTSPOTS_QUERY_CMD), | |
3b4612fb | 290 | CMD(CARD_STATE_NOTIFICATION), |
fb3ceb81 EG |
291 | CMD(BT_COEX_PRIO_TABLE), |
292 | CMD(BT_COEX_PROT_ENV), | |
293 | CMD(BT_PROFILE_NOTIFICATION), | |
294 | CMD(BT_CONFIG), | |
8ca151b5 JB |
295 | }; |
296 | #undef CMD | |
297 | ||
298 | /* this forward declaration can avoid to export the function */ | |
299 | static void iwl_mvm_async_handlers_wk(struct work_struct *wk); | |
300 | ||
301 | static struct iwl_op_mode * | |
302 | iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg, | |
303 | const struct iwl_fw *fw, struct dentry *dbgfs_dir) | |
304 | { | |
305 | struct ieee80211_hw *hw; | |
306 | struct iwl_op_mode *op_mode; | |
307 | struct iwl_mvm *mvm; | |
308 | struct iwl_trans_config trans_cfg = {}; | |
309 | static const u8 no_reclaim_cmds[] = { | |
310 | TX_CMD, | |
311 | }; | |
312 | int err, scan_size; | |
313 | ||
8ca151b5 JB |
314 | /******************************** |
315 | * 1. Allocating and configuring HW data | |
316 | ********************************/ | |
317 | hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) + | |
318 | sizeof(struct iwl_mvm), | |
319 | &iwl_mvm_hw_ops); | |
320 | if (!hw) | |
321 | return NULL; | |
322 | ||
323 | op_mode = hw->priv; | |
324 | op_mode->ops = &iwl_mvm_ops; | |
325 | op_mode->trans = trans; | |
326 | ||
327 | mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
328 | mvm->dev = trans->dev; | |
329 | mvm->trans = trans; | |
330 | mvm->cfg = cfg; | |
331 | mvm->fw = fw; | |
332 | mvm->hw = hw; | |
333 | ||
334 | mutex_init(&mvm->mutex); | |
335 | spin_lock_init(&mvm->async_handlers_lock); | |
336 | INIT_LIST_HEAD(&mvm->time_event_list); | |
337 | INIT_LIST_HEAD(&mvm->async_handlers_list); | |
338 | spin_lock_init(&mvm->time_event_lock); | |
339 | ||
340 | INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk); | |
341 | INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk); | |
342 | INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk); | |
343 | ||
344 | SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev); | |
345 | ||
346 | /* | |
347 | * Populate the state variables that the transport layer needs | |
348 | * to know about. | |
349 | */ | |
350 | trans_cfg.op_mode = op_mode; | |
351 | trans_cfg.no_reclaim_cmds = no_reclaim_cmds; | |
352 | trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds); | |
353 | trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K; | |
354 | ||
25b9ea5c | 355 | if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE) |
8ca151b5 JB |
356 | trans_cfg.bc_table_dword = true; |
357 | ||
358 | if (!iwlwifi_mod_params.wd_disable) | |
359 | trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout; | |
360 | else | |
361 | trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED; | |
362 | ||
363 | trans_cfg.command_names = iwl_mvm_cmd_strings; | |
364 | ||
365 | trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE; | |
366 | trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO; | |
367 | ||
368 | snprintf(mvm->hw->wiphy->fw_version, | |
369 | sizeof(mvm->hw->wiphy->fw_version), | |
370 | "%s", fw->fw_version); | |
371 | ||
372 | /* Configure transport layer */ | |
373 | iwl_trans_configure(mvm->trans, &trans_cfg); | |
374 | ||
375 | trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD; | |
376 | trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start); | |
377 | ||
378 | /* set up notification wait support */ | |
379 | iwl_notification_wait_init(&mvm->notif_wait); | |
380 | ||
381 | /* Init phy db */ | |
382 | mvm->phy_db = iwl_phy_db_init(trans); | |
383 | if (!mvm->phy_db) { | |
384 | IWL_ERR(mvm, "Cannot init phy_db\n"); | |
385 | goto out_free; | |
386 | } | |
387 | ||
388 | IWL_INFO(mvm, "Detected %s, REV=0x%X\n", | |
389 | mvm->cfg->name, mvm->trans->hw_rev); | |
390 | ||
391 | err = iwl_trans_start_hw(mvm->trans); | |
392 | if (err) | |
393 | goto out_free; | |
394 | ||
395 | mutex_lock(&mvm->mutex); | |
396 | err = iwl_run_init_mvm_ucode(mvm, true); | |
397 | mutex_unlock(&mvm->mutex); | |
398 | if (err && !iwlmvm_mod_params.init_dbg) { | |
399 | IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err); | |
400 | goto out_free; | |
401 | } | |
402 | ||
403 | /* Stop the hw after the ALIVE and NVM has been read */ | |
404 | if (!iwlmvm_mod_params.init_dbg) | |
405 | iwl_trans_stop_hw(mvm->trans, false); | |
406 | ||
407 | scan_size = sizeof(struct iwl_scan_cmd) + | |
408 | mvm->fw->ucode_capa.max_probe_length + | |
409 | (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel)); | |
410 | mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL); | |
411 | if (!mvm->scan_cmd) | |
412 | goto out_free; | |
413 | ||
414 | err = iwl_mvm_mac_setup_register(mvm); | |
415 | if (err) | |
416 | goto out_free; | |
417 | ||
418 | err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir); | |
419 | if (err) | |
420 | goto out_unregister; | |
421 | ||
422 | return op_mode; | |
423 | ||
424 | out_unregister: | |
425 | ieee80211_unregister_hw(mvm->hw); | |
426 | out_free: | |
427 | iwl_phy_db_free(mvm->phy_db); | |
428 | kfree(mvm->scan_cmd); | |
8ca151b5 JB |
429 | iwl_trans_stop_hw(trans, true); |
430 | ieee80211_free_hw(mvm->hw); | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode) | |
435 | { | |
436 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
437 | int i; | |
438 | ||
439 | iwl_mvm_leds_exit(mvm); | |
440 | ||
441 | ieee80211_unregister_hw(mvm->hw); | |
442 | ||
443 | kfree(mvm->scan_cmd); | |
444 | ||
445 | iwl_trans_stop_hw(mvm->trans, true); | |
446 | ||
447 | iwl_phy_db_free(mvm->phy_db); | |
448 | mvm->phy_db = NULL; | |
449 | ||
8ca151b5 JB |
450 | iwl_free_nvm_data(mvm->nvm_data); |
451 | for (i = 0; i < NVM_NUM_OF_SECTIONS; i++) | |
452 | kfree(mvm->nvm_sections[i].data); | |
453 | ||
454 | ieee80211_free_hw(mvm->hw); | |
455 | } | |
456 | ||
457 | struct iwl_async_handler_entry { | |
458 | struct list_head list; | |
459 | struct iwl_rx_cmd_buffer rxb; | |
460 | int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
461 | struct iwl_device_cmd *cmd); | |
462 | }; | |
463 | ||
464 | void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm) | |
465 | { | |
466 | struct iwl_async_handler_entry *entry, *tmp; | |
467 | ||
468 | spin_lock_bh(&mvm->async_handlers_lock); | |
469 | list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) { | |
470 | iwl_free_rxb(&entry->rxb); | |
471 | list_del(&entry->list); | |
472 | kfree(entry); | |
473 | } | |
474 | spin_unlock_bh(&mvm->async_handlers_lock); | |
475 | } | |
476 | ||
477 | static void iwl_mvm_async_handlers_wk(struct work_struct *wk) | |
478 | { | |
479 | struct iwl_mvm *mvm = | |
480 | container_of(wk, struct iwl_mvm, async_handlers_wk); | |
481 | struct iwl_async_handler_entry *entry, *tmp; | |
482 | struct list_head local_list; | |
483 | ||
484 | INIT_LIST_HEAD(&local_list); | |
485 | ||
486 | /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */ | |
487 | mutex_lock(&mvm->mutex); | |
488 | ||
489 | /* | |
490 | * Sync with Rx path with a lock. Remove all the entries from this list, | |
491 | * add them to a local one (lock free), and then handle them. | |
492 | */ | |
493 | spin_lock_bh(&mvm->async_handlers_lock); | |
494 | list_splice_init(&mvm->async_handlers_list, &local_list); | |
495 | spin_unlock_bh(&mvm->async_handlers_lock); | |
496 | ||
497 | list_for_each_entry_safe(entry, tmp, &local_list, list) { | |
498 | if (entry->fn(mvm, &entry->rxb, NULL)) | |
499 | IWL_WARN(mvm, | |
500 | "returned value from ASYNC handlers are ignored\n"); | |
501 | iwl_free_rxb(&entry->rxb); | |
502 | list_del(&entry->list); | |
503 | kfree(entry); | |
504 | } | |
505 | mutex_unlock(&mvm->mutex); | |
506 | } | |
507 | ||
508 | static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode, | |
509 | struct iwl_rx_cmd_buffer *rxb, | |
510 | struct iwl_device_cmd *cmd) | |
511 | { | |
512 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
513 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
514 | u8 i; | |
515 | ||
516 | /* | |
517 | * Do the notification wait before RX handlers so | |
518 | * even if the RX handler consumes the RXB we have | |
519 | * access to it in the notification wait entry. | |
520 | */ | |
521 | iwl_notification_wait_notify(&mvm->notif_wait, pkt); | |
522 | ||
523 | for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) { | |
524 | const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i]; | |
36eed56a EG |
525 | struct iwl_async_handler_entry *entry; |
526 | ||
527 | if (rx_h->cmd_id != pkt->hdr.cmd) | |
528 | continue; | |
529 | ||
530 | if (!rx_h->async) | |
531 | return rx_h->fn(mvm, rxb, cmd); | |
532 | ||
533 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
534 | /* we can't do much... */ | |
535 | if (!entry) | |
536 | return 0; | |
537 | ||
538 | entry->rxb._page = rxb_steal_page(rxb); | |
539 | entry->rxb._offset = rxb->_offset; | |
540 | entry->rxb._rx_page_order = rxb->_rx_page_order; | |
541 | entry->fn = rx_h->fn; | |
542 | spin_lock(&mvm->async_handlers_lock); | |
543 | list_add_tail(&entry->list, &mvm->async_handlers_list); | |
544 | spin_unlock(&mvm->async_handlers_lock); | |
545 | schedule_work(&mvm->async_handlers_wk); | |
546 | break; | |
8ca151b5 JB |
547 | } |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue) | |
553 | { | |
554 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
555 | int mq = mvm->queue_to_mac80211[queue]; | |
556 | ||
557 | if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE)) | |
558 | return; | |
559 | ||
560 | if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) { | |
561 | IWL_DEBUG_TX_QUEUES(mvm, | |
562 | "queue %d (mac80211 %d) already stopped\n", | |
563 | queue, mq); | |
564 | return; | |
565 | } | |
566 | ||
567 | set_bit(mq, &mvm->transport_queue_stop); | |
568 | ieee80211_stop_queue(mvm->hw, mq); | |
569 | } | |
570 | ||
571 | static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue) | |
572 | { | |
573 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
574 | int mq = mvm->queue_to_mac80211[queue]; | |
575 | ||
576 | if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE)) | |
577 | return; | |
578 | ||
579 | if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) { | |
580 | IWL_DEBUG_TX_QUEUES(mvm, | |
581 | "queue %d (mac80211 %d) already awake\n", | |
582 | queue, mq); | |
583 | return; | |
584 | } | |
585 | ||
586 | clear_bit(mq, &mvm->transport_queue_stop); | |
587 | ||
588 | ieee80211_wake_queue(mvm->hw, mq); | |
589 | } | |
590 | ||
591 | static void iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state) | |
592 | { | |
593 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
594 | ||
595 | if (state) | |
596 | set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status); | |
597 | else | |
598 | clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status); | |
599 | ||
600 | wiphy_rfkill_set_hw_state(mvm->hw->wiphy, state); | |
601 | } | |
602 | ||
603 | static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb) | |
604 | { | |
605 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
606 | struct ieee80211_tx_info *info; | |
607 | ||
608 | info = IEEE80211_SKB_CB(skb); | |
609 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
610 | ieee80211_free_txskb(mvm->hw, skb); | |
611 | } | |
612 | ||
715c998f | 613 | static void iwl_mvm_nic_restart(struct iwl_mvm *mvm) |
8ca151b5 | 614 | { |
8ca151b5 JB |
615 | iwl_abort_notification_waits(&mvm->notif_wait); |
616 | ||
617 | /* | |
618 | * If we're restarting already, don't cycle restarts. | |
619 | * If INIT fw asserted, it will likely fail again. | |
620 | * If WoWLAN fw asserted, don't restart either, mac80211 | |
621 | * can't recover this since we're already half suspended. | |
622 | */ | |
623 | if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
624 | IWL_ERR(mvm, "Firmware error during reconfiguration! Abort.\n"); | |
625 | } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && | |
626 | iwlwifi_mod_params.restart_fw) { | |
627 | /* | |
628 | * This is a bit racy, but worst case we tell mac80211 about | |
629 | * a stopped/aborted (sched) scan when that was already done | |
630 | * which is not a problem. It is necessary to abort any scan | |
631 | * here because mac80211 requires having the scan cleared | |
632 | * before restarting. | |
633 | * We'll reset the scan_status to NONE in restart cleanup in | |
634 | * the next start() call from mac80211. | |
635 | */ | |
636 | switch (mvm->scan_status) { | |
637 | case IWL_MVM_SCAN_NONE: | |
638 | break; | |
639 | case IWL_MVM_SCAN_OS: | |
640 | ieee80211_scan_completed(mvm->hw, true); | |
641 | break; | |
642 | } | |
643 | ||
644 | ieee80211_restart_hw(mvm->hw); | |
645 | } | |
646 | } | |
647 | ||
715c998f EG |
648 | static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode) |
649 | { | |
650 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
651 | ||
652 | iwl_mvm_dump_nic_error_log(mvm); | |
653 | ||
654 | iwl_mvm_nic_restart(mvm); | |
655 | } | |
656 | ||
8ca151b5 JB |
657 | static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode) |
658 | { | |
715c998f EG |
659 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); |
660 | ||
8ca151b5 | 661 | WARN_ON(1); |
715c998f | 662 | iwl_mvm_nic_restart(mvm); |
8ca151b5 JB |
663 | } |
664 | ||
665 | static const struct iwl_op_mode_ops iwl_mvm_ops = { | |
666 | .start = iwl_op_mode_mvm_start, | |
667 | .stop = iwl_op_mode_mvm_stop, | |
668 | .rx = iwl_mvm_rx_dispatch, | |
669 | .queue_full = iwl_mvm_stop_sw_queue, | |
670 | .queue_not_full = iwl_mvm_wake_sw_queue, | |
671 | .hw_rf_kill = iwl_mvm_set_hw_rfkill_state, | |
672 | .free_skb = iwl_mvm_free_skb, | |
673 | .nic_error = iwl_mvm_nic_error, | |
674 | .cmd_queue_full = iwl_mvm_cmd_queue_full, | |
675 | .nic_config = iwl_mvm_nic_config, | |
676 | }; |