1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
|
/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include <linux/module.h>
#include <net/mac80211.h>
#include "iwl-notif-wait.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-fw.h"
#include "iwl-debug.h"
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "mvm.h"
#include "iwl-phy-db.h"
#include "iwl-eeprom-parse.h"
#include "iwl-csr.h"
#include "iwl-io.h"
#include "iwl-prph.h"
#include "rs.h"
#include "fw-api-scan.h"
#include "time-event.h"
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
#define DRV_VERSION IWLWIFI_VERSION
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
static const struct iwl_op_mode_ops iwl_mvm_ops;
struct iwl_mvm_mod_params iwlmvm_mod_params = {
.power_scheme = IWL_POWER_SCHEME_BPS,
/* rest of fields are 0 by default */
};
module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
MODULE_PARM_DESC(init_dbg,
"set to true to debug an ASSERT in INIT fw (default: false");
module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
MODULE_PARM_DESC(power_scheme,
"power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
/*
* module init and exit functions
*/
static int __init iwl_mvm_init(void)
{
int ret;
ret = iwl_mvm_rate_control_register();
if (ret) {
pr_err("Unable to register rate control algorithm: %d\n", ret);
return ret;
}
ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
if (ret) {
pr_err("Unable to register MVM op_mode: %d\n", ret);
iwl_mvm_rate_control_unregister();
}
return ret;
}
module_init(iwl_mvm_init);
static void __exit iwl_mvm_exit(void)
{
iwl_opmode_deregister("iwlmvm");
iwl_mvm_rate_control_unregister();
}
module_exit(iwl_mvm_exit);
static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
u32 reg_val = 0;
/*
* We can't upload the correct value to the INIT image
* as we don't have nvm_data by that time.
*
* TODO: Figure out what we should do here
*/
if (mvm->nvm_data) {
radio_cfg_type = mvm->nvm_data->radio_cfg_type;
radio_cfg_step = mvm->nvm_data->radio_cfg_step;
radio_cfg_dash = mvm->nvm_data->radio_cfg_dash;
} else {
radio_cfg_type = 0;
radio_cfg_step = 0;
radio_cfg_dash = 0;
}
/* SKU control */
reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
/* radio configuration */
reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
/* silicon bits */
reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
reg_val |= CSR_HW_IF_CONFIG_REG_BIT_MAC_SI;
iwl_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
reg_val);
IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
radio_cfg_step, radio_cfg_dash);
/*
* W/A : NIC is stuck in a reset state after Early PCIe power off
* (PCIe power is lost before PERST# is asserted), causing ME FW
* to lose ownership and not being able to obtain it back.
*/
iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
}
struct iwl_rx_handlers {
u8 cmd_id;
bool async;
int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
};
#define RX_HANDLER(_cmd_id, _fn, _async) \
{ .cmd_id = _cmd_id , .fn = _fn , .async = _async }
/*
* Handlers for fw notifications
* Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
* This list should be in order of frequency for performance purposes.
*
* The handler can be SYNC - this means that it will be called in the Rx path
* which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
* only in this case!), it should be set as ASYNC. In that case, it will be
* called from a worker with mvm->mutex held.
*/
static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, false),
RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
};
#undef RX_HANDLER
#define CMD(x) [x] = #x
static const char *iwl_mvm_cmd_strings[REPLY_MAX] = {
CMD(MVM_ALIVE),
CMD(REPLY_ERROR),
CMD(INIT_COMPLETE_NOTIF),
CMD(PHY_CONTEXT_CMD),
CMD(MGMT_MCAST_KEY),
CMD(TX_CMD),
CMD(TXPATH_FLUSH),
CMD(MAC_CONTEXT_CMD),
CMD(TIME_EVENT_CMD),
CMD(TIME_EVENT_NOTIFICATION),
CMD(BINDING_CONTEXT_CMD),
CMD(TIME_QUOTA_CMD),
CMD(RADIO_VERSION_NOTIFICATION),
CMD(SCAN_REQUEST_CMD),
CMD(SCAN_ABORT_CMD),
CMD(SCAN_START_NOTIFICATION),
CMD(SCAN_RESULTS_NOTIFICATION),
CMD(SCAN_COMPLETE_NOTIFICATION),
CMD(NVM_ACCESS_CMD),
CMD(PHY_CONFIGURATION_CMD),
CMD(CALIB_RES_NOTIF_PHY_DB),
CMD(SET_CALIB_DEFAULT_CMD),
CMD(CALIBRATION_COMPLETE_NOTIFICATION),
CMD(ADD_STA),
CMD(REMOVE_STA),
CMD(LQ_CMD),
CMD(SCAN_OFFLOAD_CONFIG_CMD),
CMD(SCAN_OFFLOAD_REQUEST_CMD),
CMD(SCAN_OFFLOAD_ABORT_CMD),
CMD(SCAN_OFFLOAD_COMPLETE),
CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
CMD(POWER_TABLE_CMD),
CMD(WEP_KEY),
CMD(REPLY_RX_PHY_CMD),
CMD(REPLY_RX_MPDU_CMD),
CMD(BEACON_TEMPLATE_CMD),
CMD(STATISTICS_NOTIFICATION),
CMD(TX_ANT_CONFIGURATION_CMD),
CMD(D3_CONFIG_CMD),
CMD(PROT_OFFLOAD_CONFIG_CMD),
CMD(OFFLOADS_QUERY_CMD),
CMD(REMOTE_WAKE_CONFIG_CMD),
CMD(WOWLAN_PATTERNS),
CMD(WOWLAN_CONFIGURATION),
CMD(WOWLAN_TSC_RSC_PARAM),
CMD(WOWLAN_TKIP_PARAM),
CMD(WOWLAN_KEK_KCK_MATERIAL),
CMD(WOWLAN_GET_STATUSES),
CMD(WOWLAN_TX_POWER_PER_DB),
CMD(NET_DETECT_CONFIG_CMD),
CMD(NET_DETECT_PROFILES_QUERY_CMD),
CMD(NET_DETECT_PROFILES_CMD),
CMD(NET_DETECT_HOTSPOTS_CMD),
CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
};
#undef CMD
/* this forward declaration can avoid to export the function */
static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
static struct iwl_op_mode *
iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
const struct iwl_fw *fw, struct dentry *dbgfs_dir)
{
struct ieee80211_hw *hw;
struct iwl_op_mode *op_mode;
struct iwl_mvm *mvm;
struct iwl_trans_config trans_cfg = {};
static const u8 no_reclaim_cmds[] = {
TX_CMD,
};
int err, scan_size;
switch (cfg->device_family) {
case IWL_DEVICE_FAMILY_6030:
case IWL_DEVICE_FAMILY_6005:
case IWL_DEVICE_FAMILY_7000:
break;
default:
IWL_ERR(trans, "Trying to load mvm on an unsupported device\n");
return NULL;
}
/********************************
* 1. Allocating and configuring HW data
********************************/
hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
sizeof(struct iwl_mvm),
&iwl_mvm_hw_ops);
if (!hw)
return NULL;
op_mode = hw->priv;
op_mode->ops = &iwl_mvm_ops;
op_mode->trans = trans;
mvm = IWL_OP_MODE_GET_MVM(op_mode);
mvm->dev = trans->dev;
mvm->trans = trans;
mvm->cfg = cfg;
mvm->fw = fw;
mvm->hw = hw;
mutex_init(&mvm->mutex);
spin_lock_init(&mvm->async_handlers_lock);
INIT_LIST_HEAD(&mvm->time_event_list);
INIT_LIST_HEAD(&mvm->async_handlers_list);
spin_lock_init(&mvm->time_event_lock);
INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
/*
* Populate the state variables that the transport layer needs
* to know about.
*/
trans_cfg.op_mode = op_mode;
trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
/* TODO: this should really be a TLV */
if (cfg->device_family == IWL_DEVICE_FAMILY_7000)
trans_cfg.bc_table_dword = true;
if (!iwlwifi_mod_params.wd_disable)
trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
else
trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
trans_cfg.command_names = iwl_mvm_cmd_strings;
trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
snprintf(mvm->hw->wiphy->fw_version,
sizeof(mvm->hw->wiphy->fw_version),
"%s", fw->fw_version);
/* Configure transport layer */
iwl_trans_configure(mvm->trans, &trans_cfg);
trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
/* set up notification wait support */
iwl_notification_wait_init(&mvm->notif_wait);
/* Init phy db */
mvm->phy_db = iwl_phy_db_init(trans);
if (!mvm->phy_db) {
IWL_ERR(mvm, "Cannot init phy_db\n");
goto out_free;
}
IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
mvm->cfg->name, mvm->trans->hw_rev);
err = iwl_trans_start_hw(mvm->trans);
if (err)
goto out_free;
mutex_lock(&mvm->mutex);
err = iwl_run_init_mvm_ucode(mvm, true);
mutex_unlock(&mvm->mutex);
if (err && !iwlmvm_mod_params.init_dbg) {
IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
goto out_free;
}
/* Stop the hw after the ALIVE and NVM has been read */
if (!iwlmvm_mod_params.init_dbg)
iwl_trans_stop_hw(mvm->trans, false);
scan_size = sizeof(struct iwl_scan_cmd) +
mvm->fw->ucode_capa.max_probe_length +
(MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
if (!mvm->scan_cmd)
goto out_free;
err = iwl_mvm_mac_setup_register(mvm);
if (err)
goto out_free;
err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
if (err)
goto out_unregister;
return op_mode;
out_unregister:
ieee80211_unregister_hw(mvm->hw);
out_free:
iwl_phy_db_free(mvm->phy_db);
kfree(mvm->scan_cmd);
kfree(mvm->eeprom_blob);
iwl_trans_stop_hw(trans, true);
ieee80211_free_hw(mvm->hw);
return NULL;
}
static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
int i;
iwl_mvm_leds_exit(mvm);
ieee80211_unregister_hw(mvm->hw);
kfree(mvm->scan_cmd);
iwl_trans_stop_hw(mvm->trans, true);
iwl_phy_db_free(mvm->phy_db);
mvm->phy_db = NULL;
kfree(mvm->eeprom_blob);
iwl_free_nvm_data(mvm->nvm_data);
for (i = 0; i < NVM_NUM_OF_SECTIONS; i++)
kfree(mvm->nvm_sections[i].data);
ieee80211_free_hw(mvm->hw);
}
struct iwl_async_handler_entry {
struct list_head list;
struct iwl_rx_cmd_buffer rxb;
int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
};
void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
{
struct iwl_async_handler_entry *entry, *tmp;
spin_lock_bh(&mvm->async_handlers_lock);
list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
iwl_free_rxb(&entry->rxb);
list_del(&entry->list);
kfree(entry);
}
spin_unlock_bh(&mvm->async_handlers_lock);
}
static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
{
struct iwl_mvm *mvm =
container_of(wk, struct iwl_mvm, async_handlers_wk);
struct iwl_async_handler_entry *entry, *tmp;
struct list_head local_list;
INIT_LIST_HEAD(&local_list);
/* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
mutex_lock(&mvm->mutex);
/*
* Sync with Rx path with a lock. Remove all the entries from this list,
* add them to a local one (lock free), and then handle them.
*/
spin_lock_bh(&mvm->async_handlers_lock);
list_splice_init(&mvm->async_handlers_list, &local_list);
spin_unlock_bh(&mvm->async_handlers_lock);
list_for_each_entry_safe(entry, tmp, &local_list, list) {
if (entry->fn(mvm, &entry->rxb, NULL))
IWL_WARN(mvm,
"returned value from ASYNC handlers are ignored\n");
iwl_free_rxb(&entry->rxb);
list_del(&entry->list);
kfree(entry);
}
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
u8 i;
/*
* Do the notification wait before RX handlers so
* even if the RX handler consumes the RXB we have
* access to it in the notification wait entry.
*/
iwl_notification_wait_notify(&mvm->notif_wait, pkt);
for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
if (rx_h->cmd_id == pkt->hdr.cmd) {
struct iwl_async_handler_entry *entry;
if (!rx_h->async)
return rx_h->fn(mvm, rxb, cmd);
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
/* we can't do much... */
if (!entry)
return 0;
entry->rxb._page = rxb_steal_page(rxb);
entry->rxb._offset = rxb->_offset;
entry->rxb._rx_page_order = rxb->_rx_page_order;
entry->fn = rx_h->fn;
spin_lock(&mvm->async_handlers_lock);
list_add_tail(&entry->list, &mvm->async_handlers_list);
spin_unlock(&mvm->async_handlers_lock);
schedule_work(&mvm->async_handlers_wk);
}
}
return 0;
}
static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
int mq = mvm->queue_to_mac80211[queue];
if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
return;
if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
IWL_DEBUG_TX_QUEUES(mvm,
"queue %d (mac80211 %d) already stopped\n",
queue, mq);
return;
}
set_bit(mq, &mvm->transport_queue_stop);
ieee80211_stop_queue(mvm->hw, mq);
}
static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
int mq = mvm->queue_to_mac80211[queue];
if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
return;
if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
IWL_DEBUG_TX_QUEUES(mvm,
"queue %d (mac80211 %d) already awake\n",
queue, mq);
return;
}
clear_bit(mq, &mvm->transport_queue_stop);
ieee80211_wake_queue(mvm->hw, mq);
}
static void iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
if (state)
set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
else
clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
wiphy_rfkill_set_hw_state(mvm->hw->wiphy, state);
}
static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
struct ieee80211_tx_info *info;
info = IEEE80211_SKB_CB(skb);
iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
ieee80211_free_txskb(mvm->hw, skb);
}
static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
{
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
iwl_mvm_dump_nic_error_log(mvm);
iwl_abort_notification_waits(&mvm->notif_wait);
/*
* If we're restarting already, don't cycle restarts.
* If INIT fw asserted, it will likely fail again.
* If WoWLAN fw asserted, don't restart either, mac80211
* can't recover this since we're already half suspended.
*/
if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
IWL_ERR(mvm, "Firmware error during reconfiguration! Abort.\n");
} else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
iwlwifi_mod_params.restart_fw) {
/*
* This is a bit racy, but worst case we tell mac80211 about
* a stopped/aborted (sched) scan when that was already done
* which is not a problem. It is necessary to abort any scan
* here because mac80211 requires having the scan cleared
* before restarting.
* We'll reset the scan_status to NONE in restart cleanup in
* the next start() call from mac80211.
*/
switch (mvm->scan_status) {
case IWL_MVM_SCAN_NONE:
break;
case IWL_MVM_SCAN_OS:
ieee80211_scan_completed(mvm->hw, true);
break;
}
ieee80211_restart_hw(mvm->hw);
}
}
static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
{
WARN_ON(1);
}
static const struct iwl_op_mode_ops iwl_mvm_ops = {
.start = iwl_op_mode_mvm_start,
.stop = iwl_op_mode_mvm_stop,
.rx = iwl_mvm_rx_dispatch,
.queue_full = iwl_mvm_stop_sw_queue,
.queue_not_full = iwl_mvm_wake_sw_queue,
.hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
.free_skb = iwl_mvm_free_skb,
.nic_error = iwl_mvm_nic_error,
.cmd_queue_full = iwl_mvm_cmd_queue_full,
.nic_config = iwl_mvm_nic_config,
};
|