703c106aa8ddd1090e933fc79b167d2f93591596
[pandora-kernel.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *
28  *****************************************************************************/
29
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/delay.h>
38 #include <linux/sched.h>
39 #include <linux/skbuff.h>
40 #include <linux/netdevice.h>
41 #include <linux/wireless.h>
42 #include <linux/firmware.h>
43 #include <linux/etherdevice.h>
44 #include <linux/if_arp.h>
45
46 #include <net/mac80211.h>
47
48 #include <asm/div64.h>
49
50 #include "iwl-eeprom.h"
51 #include "iwl-dev.h"
52 #include "iwl-core.h"
53 #include "iwl-io.h"
54 #include "iwl-helpers.h"
55 #include "iwl-sta.h"
56 #include "iwl-agn-calib.h"
57 #include "iwl-agn.h"
58 #include "iwl-pci.h"
59 #include "iwl-trans.h"
60
61 /******************************************************************************
62  *
63  * module boiler plate
64  *
65  ******************************************************************************/
66
67 /*
68  * module name, copyright, version, etc.
69  */
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
71
72 #ifdef CONFIG_IWLWIFI_DEBUG
73 #define VD "d"
74 #else
75 #define VD
76 #endif
77
78 #define DRV_VERSION     IWLWIFI_VERSION VD
79
80
81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
82 MODULE_VERSION(DRV_VERSION);
83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
84 MODULE_LICENSE("GPL");
85
86 static int iwlagn_ant_coupling;
87 static bool iwlagn_bt_ch_announce = 1;
88
89 void iwl_update_chain_flags(struct iwl_priv *priv)
90 {
91         struct iwl_rxon_context *ctx;
92
93         for_each_context(priv, ctx) {
94                 iwlagn_set_rxon_chain(priv, ctx);
95                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
96                         iwlagn_commit_rxon(priv, ctx);
97         }
98 }
99
100 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
101 static void iwl_set_beacon_tim(struct iwl_priv *priv,
102                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
103                                u8 *beacon, u32 frame_size)
104 {
105         u16 tim_idx;
106         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
107
108         /*
109          * The index is relative to frame start but we start looking at the
110          * variable-length part of the beacon.
111          */
112         tim_idx = mgmt->u.beacon.variable - beacon;
113
114         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
115         while ((tim_idx < (frame_size - 2)) &&
116                         (beacon[tim_idx] != WLAN_EID_TIM))
117                 tim_idx += beacon[tim_idx+1] + 2;
118
119         /* If TIM field was found, set variables */
120         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
121                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
122                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
123         } else
124                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
125 }
126
127 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
128 {
129         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
130         struct iwl_host_cmd cmd = {
131                 .id = REPLY_TX_BEACON,
132                 .flags = CMD_SYNC,
133         };
134         struct ieee80211_tx_info *info;
135         u32 frame_size;
136         u32 rate_flags;
137         u32 rate;
138
139         /*
140          * We have to set up the TX command, the TX Beacon command, and the
141          * beacon contents.
142          */
143
144         lockdep_assert_held(&priv->mutex);
145
146         if (!priv->beacon_ctx) {
147                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
148                 return 0;
149         }
150
151         if (WARN_ON(!priv->beacon_skb))
152                 return -EINVAL;
153
154         /* Allocate beacon command */
155         if (!priv->beacon_cmd)
156                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
157         tx_beacon_cmd = priv->beacon_cmd;
158         if (!tx_beacon_cmd)
159                 return -ENOMEM;
160
161         frame_size = priv->beacon_skb->len;
162
163         /* Set up TX command fields */
164         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
165         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
166         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
167         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
168                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
169
170         /* Set up TX beacon command fields */
171         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
172                            frame_size);
173
174         /* Set up packet rate and flags */
175         info = IEEE80211_SKB_CB(priv->beacon_skb);
176
177         /*
178          * Let's set up the rate at least somewhat correctly;
179          * it will currently not actually be used by the uCode,
180          * it uses the broadcast station's rate instead.
181          */
182         if (info->control.rates[0].idx < 0 ||
183             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
184                 rate = 0;
185         else
186                 rate = info->control.rates[0].idx;
187
188         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
189                                               priv->hw_params.valid_tx_ant);
190         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
191
192         /* In mac80211, rates for 5 GHz start at 0 */
193         if (info->band == IEEE80211_BAND_5GHZ)
194                 rate += IWL_FIRST_OFDM_RATE;
195         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
196                 rate_flags |= RATE_MCS_CCK_MSK;
197
198         tx_beacon_cmd->tx.rate_n_flags =
199                         iwl_hw_set_rate_n_flags(rate, rate_flags);
200
201         /* Submit command */
202         cmd.len[0] = sizeof(*tx_beacon_cmd);
203         cmd.data[0] = tx_beacon_cmd;
204         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
205         cmd.len[1] = frame_size;
206         cmd.data[1] = priv->beacon_skb->data;
207         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
208
209         return trans_send_cmd(priv, &cmd);
210 }
211
212 static void iwl_bg_beacon_update(struct work_struct *work)
213 {
214         struct iwl_priv *priv =
215                 container_of(work, struct iwl_priv, beacon_update);
216         struct sk_buff *beacon;
217
218         mutex_lock(&priv->mutex);
219         if (!priv->beacon_ctx) {
220                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
221                 goto out;
222         }
223
224         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
225                 /*
226                  * The ucode will send beacon notifications even in
227                  * IBSS mode, but we don't want to process them. But
228                  * we need to defer the type check to here due to
229                  * requiring locking around the beacon_ctx access.
230                  */
231                 goto out;
232         }
233
234         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
235         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
236         if (!beacon) {
237                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
238                 goto out;
239         }
240
241         /* new beacon skb is allocated every time; dispose previous.*/
242         dev_kfree_skb(priv->beacon_skb);
243
244         priv->beacon_skb = beacon;
245
246         iwlagn_send_beacon_cmd(priv);
247  out:
248         mutex_unlock(&priv->mutex);
249 }
250
251 static void iwl_bg_bt_runtime_config(struct work_struct *work)
252 {
253         struct iwl_priv *priv =
254                 container_of(work, struct iwl_priv, bt_runtime_config);
255
256         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
257                 return;
258
259         /* dont send host command if rf-kill is on */
260         if (!iwl_is_ready_rf(priv))
261                 return;
262         iwlagn_send_advance_bt_config(priv);
263 }
264
265 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
266 {
267         struct iwl_priv *priv =
268                 container_of(work, struct iwl_priv, bt_full_concurrency);
269         struct iwl_rxon_context *ctx;
270
271         mutex_lock(&priv->mutex);
272
273         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
274                 goto out;
275
276         /* dont send host command if rf-kill is on */
277         if (!iwl_is_ready_rf(priv))
278                 goto out;
279
280         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
281                        priv->bt_full_concurrent ?
282                        "full concurrency" : "3-wire");
283
284         /*
285          * LQ & RXON updated cmds must be sent before BT Config cmd
286          * to avoid 3-wire collisions
287          */
288         for_each_context(priv, ctx) {
289                 iwlagn_set_rxon_chain(priv, ctx);
290                 iwlagn_commit_rxon(priv, ctx);
291         }
292
293         iwlagn_send_advance_bt_config(priv);
294 out:
295         mutex_unlock(&priv->mutex);
296 }
297
298 /**
299  * iwl_bg_statistics_periodic - Timer callback to queue statistics
300  *
301  * This callback is provided in order to send a statistics request.
302  *
303  * This timer function is continually reset to execute within
304  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
305  * was received.  We need to ensure we receive the statistics in order
306  * to update the temperature used for calibrating the TXPOWER.
307  */
308 static void iwl_bg_statistics_periodic(unsigned long data)
309 {
310         struct iwl_priv *priv = (struct iwl_priv *)data;
311
312         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
313                 return;
314
315         /* dont send host command if rf-kill is on */
316         if (!iwl_is_ready_rf(priv))
317                 return;
318
319         iwl_send_statistics_request(priv, CMD_ASYNC, false);
320 }
321
322
323 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
324                                         u32 start_idx, u32 num_events,
325                                         u32 mode)
326 {
327         u32 i;
328         u32 ptr;        /* SRAM byte address of log data */
329         u32 ev, time, data; /* event log data */
330         unsigned long reg_flags;
331
332         if (mode == 0)
333                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
334         else
335                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
336
337         /* Make sure device is powered up for SRAM reads */
338         spin_lock_irqsave(&priv->reg_lock, reg_flags);
339         if (iwl_grab_nic_access(priv)) {
340                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
341                 return;
342         }
343
344         /* Set starting address; reads will auto-increment */
345         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
346         rmb();
347
348         /*
349          * "time" is actually "data" for mode 0 (no timestamp).
350          * place event id # at far right for easier visual parsing.
351          */
352         for (i = 0; i < num_events; i++) {
353                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
354                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
355                 if (mode == 0) {
356                         trace_iwlwifi_dev_ucode_cont_event(priv,
357                                                         0, time, ev);
358                 } else {
359                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
360                         trace_iwlwifi_dev_ucode_cont_event(priv,
361                                                 time, data, ev);
362                 }
363         }
364         /* Allow device to power down */
365         iwl_release_nic_access(priv);
366         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
367 }
368
369 static void iwl_continuous_event_trace(struct iwl_priv *priv)
370 {
371         u32 capacity;   /* event log capacity in # entries */
372         u32 base;       /* SRAM byte address of event log header */
373         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
374         u32 num_wraps;  /* # times uCode wrapped to top of log */
375         u32 next_entry; /* index of next entry to be written by uCode */
376
377         base = priv->device_pointers.error_event_table;
378         if (iwlagn_hw_valid_rtc_data_addr(base)) {
379                 capacity = iwl_read_targ_mem(priv, base);
380                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
381                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
382                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
383         } else
384                 return;
385
386         if (num_wraps == priv->event_log.num_wraps) {
387                 iwl_print_cont_event_trace(priv,
388                                        base, priv->event_log.next_entry,
389                                        next_entry - priv->event_log.next_entry,
390                                        mode);
391                 priv->event_log.non_wraps_count++;
392         } else {
393                 if ((num_wraps - priv->event_log.num_wraps) > 1)
394                         priv->event_log.wraps_more_count++;
395                 else
396                         priv->event_log.wraps_once_count++;
397                 trace_iwlwifi_dev_ucode_wrap_event(priv,
398                                 num_wraps - priv->event_log.num_wraps,
399                                 next_entry, priv->event_log.next_entry);
400                 if (next_entry < priv->event_log.next_entry) {
401                         iwl_print_cont_event_trace(priv, base,
402                                priv->event_log.next_entry,
403                                capacity - priv->event_log.next_entry,
404                                mode);
405
406                         iwl_print_cont_event_trace(priv, base, 0,
407                                 next_entry, mode);
408                 } else {
409                         iwl_print_cont_event_trace(priv, base,
410                                next_entry, capacity - next_entry,
411                                mode);
412
413                         iwl_print_cont_event_trace(priv, base, 0,
414                                 next_entry, mode);
415                 }
416         }
417         priv->event_log.num_wraps = num_wraps;
418         priv->event_log.next_entry = next_entry;
419 }
420
421 /**
422  * iwl_bg_ucode_trace - Timer callback to log ucode event
423  *
424  * The timer is continually set to execute every
425  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
426  * this function is to perform continuous uCode event logging operation
427  * if enabled
428  */
429 static void iwl_bg_ucode_trace(unsigned long data)
430 {
431         struct iwl_priv *priv = (struct iwl_priv *)data;
432
433         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
434                 return;
435
436         if (priv->event_log.ucode_trace) {
437                 iwl_continuous_event_trace(priv);
438                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
439                 mod_timer(&priv->ucode_trace,
440                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
441         }
442 }
443
444 static void iwl_bg_tx_flush(struct work_struct *work)
445 {
446         struct iwl_priv *priv =
447                 container_of(work, struct iwl_priv, tx_flush);
448
449         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
450                 return;
451
452         /* do nothing if rf-kill is on */
453         if (!iwl_is_ready_rf(priv))
454                 return;
455
456         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
457         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
458 }
459
460 /*****************************************************************************
461  *
462  * sysfs attributes
463  *
464  *****************************************************************************/
465
466 #ifdef CONFIG_IWLWIFI_DEBUG
467
468 /*
469  * The following adds a new attribute to the sysfs representation
470  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
471  * used for controlling the debug level.
472  *
473  * See the level definitions in iwl for details.
474  *
475  * The debug_level being managed using sysfs below is a per device debug
476  * level that is used instead of the global debug level if it (the per
477  * device debug level) is set.
478  */
479 static ssize_t show_debug_level(struct device *d,
480                                 struct device_attribute *attr, char *buf)
481 {
482         struct iwl_priv *priv = dev_get_drvdata(d);
483         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
484 }
485 static ssize_t store_debug_level(struct device *d,
486                                 struct device_attribute *attr,
487                                  const char *buf, size_t count)
488 {
489         struct iwl_priv *priv = dev_get_drvdata(d);
490         unsigned long val;
491         int ret;
492
493         ret = strict_strtoul(buf, 0, &val);
494         if (ret)
495                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
496         else {
497                 priv->debug_level = val;
498                 if (iwl_alloc_traffic_mem(priv))
499                         IWL_ERR(priv,
500                                 "Not enough memory to generate traffic log\n");
501         }
502         return strnlen(buf, count);
503 }
504
505 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
506                         show_debug_level, store_debug_level);
507
508
509 #endif /* CONFIG_IWLWIFI_DEBUG */
510
511
512 static ssize_t show_temperature(struct device *d,
513                                 struct device_attribute *attr, char *buf)
514 {
515         struct iwl_priv *priv = dev_get_drvdata(d);
516
517         if (!iwl_is_alive(priv))
518                 return -EAGAIN;
519
520         return sprintf(buf, "%d\n", priv->temperature);
521 }
522
523 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
524
525 static ssize_t show_tx_power(struct device *d,
526                              struct device_attribute *attr, char *buf)
527 {
528         struct iwl_priv *priv = dev_get_drvdata(d);
529
530         if (!iwl_is_ready_rf(priv))
531                 return sprintf(buf, "off\n");
532         else
533                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
534 }
535
536 static ssize_t store_tx_power(struct device *d,
537                               struct device_attribute *attr,
538                               const char *buf, size_t count)
539 {
540         struct iwl_priv *priv = dev_get_drvdata(d);
541         unsigned long val;
542         int ret;
543
544         ret = strict_strtoul(buf, 10, &val);
545         if (ret)
546                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
547         else {
548                 ret = iwl_set_tx_power(priv, val, false);
549                 if (ret)
550                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
551                                 ret);
552                 else
553                         ret = count;
554         }
555         return ret;
556 }
557
558 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
559
560 static struct attribute *iwl_sysfs_entries[] = {
561         &dev_attr_temperature.attr,
562         &dev_attr_tx_power.attr,
563 #ifdef CONFIG_IWLWIFI_DEBUG
564         &dev_attr_debug_level.attr,
565 #endif
566         NULL
567 };
568
569 static struct attribute_group iwl_attribute_group = {
570         .name = NULL,           /* put in device directory */
571         .attrs = iwl_sysfs_entries,
572 };
573
574 /******************************************************************************
575  *
576  * uCode download functions
577  *
578  ******************************************************************************/
579
580 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
581 {
582         if (desc->v_addr)
583                 dma_free_coherent(priv->bus.dev, desc->len,
584                                   desc->v_addr, desc->p_addr);
585         desc->v_addr = NULL;
586         desc->len = 0;
587 }
588
589 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
590 {
591         iwl_free_fw_desc(priv, &img->code);
592         iwl_free_fw_desc(priv, &img->data);
593 }
594
595 static void iwl_dealloc_ucode(struct iwl_priv *priv)
596 {
597         iwl_free_fw_img(priv, &priv->ucode_rt);
598         iwl_free_fw_img(priv, &priv->ucode_init);
599 }
600
601 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
602                              const void *data, size_t len)
603 {
604         if (!len) {
605                 desc->v_addr = NULL;
606                 return -EINVAL;
607         }
608
609         desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
610                                           &desc->p_addr, GFP_KERNEL);
611         if (!desc->v_addr)
612                 return -ENOMEM;
613
614         desc->len = len;
615         memcpy(desc->v_addr, data, len);
616         return 0;
617 }
618
619 struct iwlagn_ucode_capabilities {
620         u32 max_probe_length;
621         u32 standard_phy_calibration_size;
622         u32 flags;
623 };
624
625 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
626 static int iwl_mac_setup_register(struct iwl_priv *priv,
627                                   struct iwlagn_ucode_capabilities *capa);
628
629 #define UCODE_EXPERIMENTAL_INDEX        100
630 #define UCODE_EXPERIMENTAL_TAG          "exp"
631
632 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
633 {
634         const char *name_pre = priv->cfg->fw_name_pre;
635         char tag[8];
636
637         if (first) {
638 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
639                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
640                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
641         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
642 #endif
643                 priv->fw_index = priv->cfg->ucode_api_max;
644                 sprintf(tag, "%d", priv->fw_index);
645         } else {
646                 priv->fw_index--;
647                 sprintf(tag, "%d", priv->fw_index);
648         }
649
650         if (priv->fw_index < priv->cfg->ucode_api_min) {
651                 IWL_ERR(priv, "no suitable firmware found!\n");
652                 return -ENOENT;
653         }
654
655         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
656
657         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
658                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
659                                 ? "EXPERIMENTAL " : "",
660                        priv->firmware_name);
661
662         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
663                                        priv->bus.dev,
664                                        GFP_KERNEL, priv, iwl_ucode_callback);
665 }
666
667 struct iwlagn_firmware_pieces {
668         const void *inst, *data, *init, *init_data;
669         size_t inst_size, data_size, init_size, init_data_size;
670
671         u32 build;
672
673         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
674         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
675 };
676
677 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
678                                        const struct firmware *ucode_raw,
679                                        struct iwlagn_firmware_pieces *pieces)
680 {
681         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
682         u32 api_ver, hdr_size;
683         const u8 *src;
684
685         priv->ucode_ver = le32_to_cpu(ucode->ver);
686         api_ver = IWL_UCODE_API(priv->ucode_ver);
687
688         switch (api_ver) {
689         default:
690                 hdr_size = 28;
691                 if (ucode_raw->size < hdr_size) {
692                         IWL_ERR(priv, "File size too small!\n");
693                         return -EINVAL;
694                 }
695                 pieces->build = le32_to_cpu(ucode->u.v2.build);
696                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
697                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
698                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
699                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
700                 src = ucode->u.v2.data;
701                 break;
702         case 0:
703         case 1:
704         case 2:
705                 hdr_size = 24;
706                 if (ucode_raw->size < hdr_size) {
707                         IWL_ERR(priv, "File size too small!\n");
708                         return -EINVAL;
709                 }
710                 pieces->build = 0;
711                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
712                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
713                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
714                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
715                 src = ucode->u.v1.data;
716                 break;
717         }
718
719         /* Verify size of file vs. image size info in file's header */
720         if (ucode_raw->size != hdr_size + pieces->inst_size +
721                                 pieces->data_size + pieces->init_size +
722                                 pieces->init_data_size) {
723
724                 IWL_ERR(priv,
725                         "uCode file size %d does not match expected size\n",
726                         (int)ucode_raw->size);
727                 return -EINVAL;
728         }
729
730         pieces->inst = src;
731         src += pieces->inst_size;
732         pieces->data = src;
733         src += pieces->data_size;
734         pieces->init = src;
735         src += pieces->init_size;
736         pieces->init_data = src;
737         src += pieces->init_data_size;
738
739         return 0;
740 }
741
742 static int iwlagn_wanted_ucode_alternative = 1;
743
744 static int iwlagn_load_firmware(struct iwl_priv *priv,
745                                 const struct firmware *ucode_raw,
746                                 struct iwlagn_firmware_pieces *pieces,
747                                 struct iwlagn_ucode_capabilities *capa)
748 {
749         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
750         struct iwl_ucode_tlv *tlv;
751         size_t len = ucode_raw->size;
752         const u8 *data;
753         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
754         u64 alternatives;
755         u32 tlv_len;
756         enum iwl_ucode_tlv_type tlv_type;
757         const u8 *tlv_data;
758
759         if (len < sizeof(*ucode)) {
760                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
761                 return -EINVAL;
762         }
763
764         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
765                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
766                         le32_to_cpu(ucode->magic));
767                 return -EINVAL;
768         }
769
770         /*
771          * Check which alternatives are present, and "downgrade"
772          * when the chosen alternative is not present, warning
773          * the user when that happens. Some files may not have
774          * any alternatives, so don't warn in that case.
775          */
776         alternatives = le64_to_cpu(ucode->alternatives);
777         tmp = wanted_alternative;
778         if (wanted_alternative > 63)
779                 wanted_alternative = 63;
780         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
781                 wanted_alternative--;
782         if (wanted_alternative && wanted_alternative != tmp)
783                 IWL_WARN(priv,
784                          "uCode alternative %d not available, choosing %d\n",
785                          tmp, wanted_alternative);
786
787         priv->ucode_ver = le32_to_cpu(ucode->ver);
788         pieces->build = le32_to_cpu(ucode->build);
789         data = ucode->data;
790
791         len -= sizeof(*ucode);
792
793         while (len >= sizeof(*tlv)) {
794                 u16 tlv_alt;
795
796                 len -= sizeof(*tlv);
797                 tlv = (void *)data;
798
799                 tlv_len = le32_to_cpu(tlv->length);
800                 tlv_type = le16_to_cpu(tlv->type);
801                 tlv_alt = le16_to_cpu(tlv->alternative);
802                 tlv_data = tlv->data;
803
804                 if (len < tlv_len) {
805                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
806                                 len, tlv_len);
807                         return -EINVAL;
808                 }
809                 len -= ALIGN(tlv_len, 4);
810                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
811
812                 /*
813                  * Alternative 0 is always valid.
814                  *
815                  * Skip alternative TLVs that are not selected.
816                  */
817                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
818                         continue;
819
820                 switch (tlv_type) {
821                 case IWL_UCODE_TLV_INST:
822                         pieces->inst = tlv_data;
823                         pieces->inst_size = tlv_len;
824                         break;
825                 case IWL_UCODE_TLV_DATA:
826                         pieces->data = tlv_data;
827                         pieces->data_size = tlv_len;
828                         break;
829                 case IWL_UCODE_TLV_INIT:
830                         pieces->init = tlv_data;
831                         pieces->init_size = tlv_len;
832                         break;
833                 case IWL_UCODE_TLV_INIT_DATA:
834                         pieces->init_data = tlv_data;
835                         pieces->init_data_size = tlv_len;
836                         break;
837                 case IWL_UCODE_TLV_BOOT:
838                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
839                         break;
840                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
841                         if (tlv_len != sizeof(u32))
842                                 goto invalid_tlv_len;
843                         capa->max_probe_length =
844                                         le32_to_cpup((__le32 *)tlv_data);
845                         break;
846                 case IWL_UCODE_TLV_PAN:
847                         if (tlv_len)
848                                 goto invalid_tlv_len;
849                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
850                         break;
851                 case IWL_UCODE_TLV_FLAGS:
852                         /* must be at least one u32 */
853                         if (tlv_len < sizeof(u32))
854                                 goto invalid_tlv_len;
855                         /* and a proper number of u32s */
856                         if (tlv_len % sizeof(u32))
857                                 goto invalid_tlv_len;
858                         /*
859                          * This driver only reads the first u32 as
860                          * right now no more features are defined,
861                          * if that changes then either the driver
862                          * will not work with the new firmware, or
863                          * it'll not take advantage of new features.
864                          */
865                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
866                         break;
867                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
868                         if (tlv_len != sizeof(u32))
869                                 goto invalid_tlv_len;
870                         pieces->init_evtlog_ptr =
871                                         le32_to_cpup((__le32 *)tlv_data);
872                         break;
873                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
874                         if (tlv_len != sizeof(u32))
875                                 goto invalid_tlv_len;
876                         pieces->init_evtlog_size =
877                                         le32_to_cpup((__le32 *)tlv_data);
878                         break;
879                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
880                         if (tlv_len != sizeof(u32))
881                                 goto invalid_tlv_len;
882                         pieces->init_errlog_ptr =
883                                         le32_to_cpup((__le32 *)tlv_data);
884                         break;
885                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
886                         if (tlv_len != sizeof(u32))
887                                 goto invalid_tlv_len;
888                         pieces->inst_evtlog_ptr =
889                                         le32_to_cpup((__le32 *)tlv_data);
890                         break;
891                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
892                         if (tlv_len != sizeof(u32))
893                                 goto invalid_tlv_len;
894                         pieces->inst_evtlog_size =
895                                         le32_to_cpup((__le32 *)tlv_data);
896                         break;
897                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
898                         if (tlv_len != sizeof(u32))
899                                 goto invalid_tlv_len;
900                         pieces->inst_errlog_ptr =
901                                         le32_to_cpup((__le32 *)tlv_data);
902                         break;
903                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
904                         if (tlv_len)
905                                 goto invalid_tlv_len;
906                         priv->enhance_sensitivity_table = true;
907                         break;
908                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
909                         if (tlv_len != sizeof(u32))
910                                 goto invalid_tlv_len;
911                         capa->standard_phy_calibration_size =
912                                         le32_to_cpup((__le32 *)tlv_data);
913                         break;
914                 default:
915                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
916                         break;
917                 }
918         }
919
920         if (len) {
921                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
922                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
923                 return -EINVAL;
924         }
925
926         return 0;
927
928  invalid_tlv_len:
929         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
930         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
931
932         return -EINVAL;
933 }
934
935 /**
936  * iwl_ucode_callback - callback when firmware was loaded
937  *
938  * If loaded successfully, copies the firmware into buffers
939  * for the card to fetch (via DMA).
940  */
941 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
942 {
943         struct iwl_priv *priv = context;
944         struct iwl_ucode_header *ucode;
945         int err;
946         struct iwlagn_firmware_pieces pieces;
947         const unsigned int api_max = priv->cfg->ucode_api_max;
948         const unsigned int api_min = priv->cfg->ucode_api_min;
949         u32 api_ver;
950         char buildstr[25];
951         u32 build;
952         struct iwlagn_ucode_capabilities ucode_capa = {
953                 .max_probe_length = 200,
954                 .standard_phy_calibration_size =
955                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
956         };
957
958         memset(&pieces, 0, sizeof(pieces));
959
960         if (!ucode_raw) {
961                 if (priv->fw_index <= priv->cfg->ucode_api_max)
962                         IWL_ERR(priv,
963                                 "request for firmware file '%s' failed.\n",
964                                 priv->firmware_name);
965                 goto try_again;
966         }
967
968         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
969                        priv->firmware_name, ucode_raw->size);
970
971         /* Make sure that we got at least the API version number */
972         if (ucode_raw->size < 4) {
973                 IWL_ERR(priv, "File size way too small!\n");
974                 goto try_again;
975         }
976
977         /* Data from ucode file:  header followed by uCode images */
978         ucode = (struct iwl_ucode_header *)ucode_raw->data;
979
980         if (ucode->ver)
981                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
982         else
983                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
984                                            &ucode_capa);
985
986         if (err)
987                 goto try_again;
988
989         api_ver = IWL_UCODE_API(priv->ucode_ver);
990         build = pieces.build;
991
992         /*
993          * api_ver should match the api version forming part of the
994          * firmware filename ... but we don't check for that and only rely
995          * on the API version read from firmware header from here on forward
996          */
997         /* no api version check required for experimental uCode */
998         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
999                 if (api_ver < api_min || api_ver > api_max) {
1000                         IWL_ERR(priv,
1001                                 "Driver unable to support your firmware API. "
1002                                 "Driver supports v%u, firmware is v%u.\n",
1003                                 api_max, api_ver);
1004                         goto try_again;
1005                 }
1006
1007                 if (api_ver != api_max)
1008                         IWL_ERR(priv,
1009                                 "Firmware has old API version. Expected v%u, "
1010                                 "got v%u. New firmware can be obtained "
1011                                 "from http://www.intellinuxwireless.org.\n",
1012                                 api_max, api_ver);
1013         }
1014
1015         if (build)
1016                 sprintf(buildstr, " build %u%s", build,
1017                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1018                                 ? " (EXP)" : "");
1019         else
1020                 buildstr[0] = '\0';
1021
1022         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1023                  IWL_UCODE_MAJOR(priv->ucode_ver),
1024                  IWL_UCODE_MINOR(priv->ucode_ver),
1025                  IWL_UCODE_API(priv->ucode_ver),
1026                  IWL_UCODE_SERIAL(priv->ucode_ver),
1027                  buildstr);
1028
1029         snprintf(priv->hw->wiphy->fw_version,
1030                  sizeof(priv->hw->wiphy->fw_version),
1031                  "%u.%u.%u.%u%s",
1032                  IWL_UCODE_MAJOR(priv->ucode_ver),
1033                  IWL_UCODE_MINOR(priv->ucode_ver),
1034                  IWL_UCODE_API(priv->ucode_ver),
1035                  IWL_UCODE_SERIAL(priv->ucode_ver),
1036                  buildstr);
1037
1038         /*
1039          * For any of the failures below (before allocating pci memory)
1040          * we will try to load a version with a smaller API -- maybe the
1041          * user just got a corrupted version of the latest API.
1042          */
1043
1044         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1045                        priv->ucode_ver);
1046         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1047                        pieces.inst_size);
1048         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1049                        pieces.data_size);
1050         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1051                        pieces.init_size);
1052         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1053                        pieces.init_data_size);
1054
1055         /* Verify that uCode images will fit in card's SRAM */
1056         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1057                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1058                         pieces.inst_size);
1059                 goto try_again;
1060         }
1061
1062         if (pieces.data_size > priv->hw_params.max_data_size) {
1063                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1064                         pieces.data_size);
1065                 goto try_again;
1066         }
1067
1068         if (pieces.init_size > priv->hw_params.max_inst_size) {
1069                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1070                         pieces.init_size);
1071                 goto try_again;
1072         }
1073
1074         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1075                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1076                         pieces.init_data_size);
1077                 goto try_again;
1078         }
1079
1080         /* Allocate ucode buffers for card's bus-master loading ... */
1081
1082         /* Runtime instructions and 2 copies of data:
1083          * 1) unmodified from disk
1084          * 2) backup cache for save/restore during power-downs */
1085         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1086                               pieces.inst, pieces.inst_size))
1087                 goto err_pci_alloc;
1088         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1089                               pieces.data, pieces.data_size))
1090                 goto err_pci_alloc;
1091
1092         /* Initialization instructions and data */
1093         if (pieces.init_size && pieces.init_data_size) {
1094                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1095                                       pieces.init, pieces.init_size))
1096                         goto err_pci_alloc;
1097                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1098                                       pieces.init_data, pieces.init_data_size))
1099                         goto err_pci_alloc;
1100         }
1101
1102         /* Now that we can no longer fail, copy information */
1103
1104         /*
1105          * The (size - 16) / 12 formula is based on the information recorded
1106          * for each event, which is of mode 1 (including timestamp) for all
1107          * new microcodes that include this information.
1108          */
1109         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1110         if (pieces.init_evtlog_size)
1111                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1112         else
1113                 priv->_agn.init_evtlog_size =
1114                         priv->cfg->base_params->max_event_log_size;
1115         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1116         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1117         if (pieces.inst_evtlog_size)
1118                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1119         else
1120                 priv->_agn.inst_evtlog_size =
1121                         priv->cfg->base_params->max_event_log_size;
1122         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1123
1124         priv->new_scan_threshold_behaviour =
1125                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1126
1127         if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1128             (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1129                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1130                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1131         } else
1132                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1133
1134         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1135                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1136         else
1137                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1138
1139         /*
1140          * figure out the offset of chain noise reset and gain commands
1141          * base on the size of standard phy calibration commands table size
1142          */
1143         if (ucode_capa.standard_phy_calibration_size >
1144             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1145                 ucode_capa.standard_phy_calibration_size =
1146                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1147
1148         priv->_agn.phy_calib_chain_noise_reset_cmd =
1149                 ucode_capa.standard_phy_calibration_size;
1150         priv->_agn.phy_calib_chain_noise_gain_cmd =
1151                 ucode_capa.standard_phy_calibration_size + 1;
1152
1153         /**************************************************
1154          * This is still part of probe() in a sense...
1155          *
1156          * 9. Setup and register with mac80211 and debugfs
1157          **************************************************/
1158         err = iwl_mac_setup_register(priv, &ucode_capa);
1159         if (err)
1160                 goto out_unbind;
1161
1162         err = iwl_dbgfs_register(priv, DRV_NAME);
1163         if (err)
1164                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1165
1166         err = sysfs_create_group(&(priv->bus.dev->kobj),
1167                                         &iwl_attribute_group);
1168         if (err) {
1169                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1170                 goto out_unbind;
1171         }
1172
1173         /* We have our copies now, allow OS release its copies */
1174         release_firmware(ucode_raw);
1175         complete(&priv->_agn.firmware_loading_complete);
1176         return;
1177
1178  try_again:
1179         /* try next, if any */
1180         if (iwl_request_firmware(priv, false))
1181                 goto out_unbind;
1182         release_firmware(ucode_raw);
1183         return;
1184
1185  err_pci_alloc:
1186         IWL_ERR(priv, "failed to allocate pci memory\n");
1187         iwl_dealloc_ucode(priv);
1188  out_unbind:
1189         complete(&priv->_agn.firmware_loading_complete);
1190         device_release_driver(priv->bus.dev);
1191         release_firmware(ucode_raw);
1192 }
1193
1194 static const char * const desc_lookup_text[] = {
1195         "OK",
1196         "FAIL",
1197         "BAD_PARAM",
1198         "BAD_CHECKSUM",
1199         "NMI_INTERRUPT_WDG",
1200         "SYSASSERT",
1201         "FATAL_ERROR",
1202         "BAD_COMMAND",
1203         "HW_ERROR_TUNE_LOCK",
1204         "HW_ERROR_TEMPERATURE",
1205         "ILLEGAL_CHAN_FREQ",
1206         "VCC_NOT_STABLE",
1207         "FH_ERROR",
1208         "NMI_INTERRUPT_HOST",
1209         "NMI_INTERRUPT_ACTION_PT",
1210         "NMI_INTERRUPT_UNKNOWN",
1211         "UCODE_VERSION_MISMATCH",
1212         "HW_ERROR_ABS_LOCK",
1213         "HW_ERROR_CAL_LOCK_FAIL",
1214         "NMI_INTERRUPT_INST_ACTION_PT",
1215         "NMI_INTERRUPT_DATA_ACTION_PT",
1216         "NMI_TRM_HW_ER",
1217         "NMI_INTERRUPT_TRM",
1218         "NMI_INTERRUPT_BREAK_POINT",
1219         "DEBUG_0",
1220         "DEBUG_1",
1221         "DEBUG_2",
1222         "DEBUG_3",
1223 };
1224
1225 static struct { char *name; u8 num; } advanced_lookup[] = {
1226         { "NMI_INTERRUPT_WDG", 0x34 },
1227         { "SYSASSERT", 0x35 },
1228         { "UCODE_VERSION_MISMATCH", 0x37 },
1229         { "BAD_COMMAND", 0x38 },
1230         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1231         { "FATAL_ERROR", 0x3D },
1232         { "NMI_TRM_HW_ERR", 0x46 },
1233         { "NMI_INTERRUPT_TRM", 0x4C },
1234         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1235         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1236         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1237         { "NMI_INTERRUPT_HOST", 0x66 },
1238         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1239         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1240         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1241         { "ADVANCED_SYSASSERT", 0 },
1242 };
1243
1244 static const char *desc_lookup(u32 num)
1245 {
1246         int i;
1247         int max = ARRAY_SIZE(desc_lookup_text);
1248
1249         if (num < max)
1250                 return desc_lookup_text[num];
1251
1252         max = ARRAY_SIZE(advanced_lookup) - 1;
1253         for (i = 0; i < max; i++) {
1254                 if (advanced_lookup[i].num == num)
1255                         break;
1256         }
1257         return advanced_lookup[i].name;
1258 }
1259
1260 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1261 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1262
1263 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1264 {
1265         u32 base;
1266         struct iwl_error_event_table table;
1267
1268         base = priv->device_pointers.error_event_table;
1269         if (priv->ucode_type == IWL_UCODE_INIT) {
1270                 if (!base)
1271                         base = priv->_agn.init_errlog_ptr;
1272         } else {
1273                 if (!base)
1274                         base = priv->_agn.inst_errlog_ptr;
1275         }
1276
1277         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1278                 IWL_ERR(priv,
1279                         "Not valid error log pointer 0x%08X for %s uCode\n",
1280                         base,
1281                         (priv->ucode_type == IWL_UCODE_INIT)
1282                                         ? "Init" : "RT");
1283                 return;
1284         }
1285
1286         iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1287
1288         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1289                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1290                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1291                         priv->status, table.valid);
1292         }
1293
1294         priv->isr_stats.err_code = table.error_id;
1295
1296         trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1297                                       table.data1, table.data2, table.line,
1298                                       table.blink1, table.blink2, table.ilink1,
1299                                       table.ilink2, table.bcon_time, table.gp1,
1300                                       table.gp2, table.gp3, table.ucode_ver,
1301                                       table.hw_ver, table.brd_ver);
1302         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1303                 desc_lookup(table.error_id));
1304         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1305         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1306         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1307         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1308         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1309         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1310         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1311         IWL_ERR(priv, "0x%08X | line\n", table.line);
1312         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1313         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1314         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1315         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1316         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1317         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1318         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1319         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1320         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1321         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1322 }
1323
1324 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1325
1326 /**
1327  * iwl_print_event_log - Dump error event log to syslog
1328  *
1329  */
1330 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1331                                u32 num_events, u32 mode,
1332                                int pos, char **buf, size_t bufsz)
1333 {
1334         u32 i;
1335         u32 base;       /* SRAM byte address of event log header */
1336         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1337         u32 ptr;        /* SRAM byte address of log data */
1338         u32 ev, time, data; /* event log data */
1339         unsigned long reg_flags;
1340
1341         if (num_events == 0)
1342                 return pos;
1343
1344         base = priv->device_pointers.log_event_table;
1345         if (priv->ucode_type == IWL_UCODE_INIT) {
1346                 if (!base)
1347                         base = priv->_agn.init_evtlog_ptr;
1348         } else {
1349                 if (!base)
1350                         base = priv->_agn.inst_evtlog_ptr;
1351         }
1352
1353         if (mode == 0)
1354                 event_size = 2 * sizeof(u32);
1355         else
1356                 event_size = 3 * sizeof(u32);
1357
1358         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1359
1360         /* Make sure device is powered up for SRAM reads */
1361         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1362         iwl_grab_nic_access(priv);
1363
1364         /* Set starting address; reads will auto-increment */
1365         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1366         rmb();
1367
1368         /* "time" is actually "data" for mode 0 (no timestamp).
1369         * place event id # at far right for easier visual parsing. */
1370         for (i = 0; i < num_events; i++) {
1371                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1372                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1373                 if (mode == 0) {
1374                         /* data, ev */
1375                         if (bufsz) {
1376                                 pos += scnprintf(*buf + pos, bufsz - pos,
1377                                                 "EVT_LOG:0x%08x:%04u\n",
1378                                                 time, ev);
1379                         } else {
1380                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1381                                         time, ev);
1382                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1383                                         time, ev);
1384                         }
1385                 } else {
1386                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1387                         if (bufsz) {
1388                                 pos += scnprintf(*buf + pos, bufsz - pos,
1389                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1390                                                  time, data, ev);
1391                         } else {
1392                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1393                                         time, data, ev);
1394                                 trace_iwlwifi_dev_ucode_event(priv, time,
1395                                         data, ev);
1396                         }
1397                 }
1398         }
1399
1400         /* Allow device to power down */
1401         iwl_release_nic_access(priv);
1402         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1403         return pos;
1404 }
1405
1406 /**
1407  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1408  */
1409 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1410                                     u32 num_wraps, u32 next_entry,
1411                                     u32 size, u32 mode,
1412                                     int pos, char **buf, size_t bufsz)
1413 {
1414         /*
1415          * display the newest DEFAULT_LOG_ENTRIES entries
1416          * i.e the entries just before the next ont that uCode would fill.
1417          */
1418         if (num_wraps) {
1419                 if (next_entry < size) {
1420                         pos = iwl_print_event_log(priv,
1421                                                 capacity - (size - next_entry),
1422                                                 size - next_entry, mode,
1423                                                 pos, buf, bufsz);
1424                         pos = iwl_print_event_log(priv, 0,
1425                                                   next_entry, mode,
1426                                                   pos, buf, bufsz);
1427                 } else
1428                         pos = iwl_print_event_log(priv, next_entry - size,
1429                                                   size, mode, pos, buf, bufsz);
1430         } else {
1431                 if (next_entry < size) {
1432                         pos = iwl_print_event_log(priv, 0, next_entry,
1433                                                   mode, pos, buf, bufsz);
1434                 } else {
1435                         pos = iwl_print_event_log(priv, next_entry - size,
1436                                                   size, mode, pos, buf, bufsz);
1437                 }
1438         }
1439         return pos;
1440 }
1441
1442 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1443
1444 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1445                             char **buf, bool display)
1446 {
1447         u32 base;       /* SRAM byte address of event log header */
1448         u32 capacity;   /* event log capacity in # entries */
1449         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1450         u32 num_wraps;  /* # times uCode wrapped to top of log */
1451         u32 next_entry; /* index of next entry to be written by uCode */
1452         u32 size;       /* # entries that we'll print */
1453         u32 logsize;
1454         int pos = 0;
1455         size_t bufsz = 0;
1456
1457         base = priv->device_pointers.log_event_table;
1458         if (priv->ucode_type == IWL_UCODE_INIT) {
1459                 logsize = priv->_agn.init_evtlog_size;
1460                 if (!base)
1461                         base = priv->_agn.init_evtlog_ptr;
1462         } else {
1463                 logsize = priv->_agn.inst_evtlog_size;
1464                 if (!base)
1465                         base = priv->_agn.inst_evtlog_ptr;
1466         }
1467
1468         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1469                 IWL_ERR(priv,
1470                         "Invalid event log pointer 0x%08X for %s uCode\n",
1471                         base,
1472                         (priv->ucode_type == IWL_UCODE_INIT)
1473                                         ? "Init" : "RT");
1474                 return -EINVAL;
1475         }
1476
1477         /* event log header */
1478         capacity = iwl_read_targ_mem(priv, base);
1479         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1480         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1481         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1482
1483         if (capacity > logsize) {
1484                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1485                         capacity, logsize);
1486                 capacity = logsize;
1487         }
1488
1489         if (next_entry > logsize) {
1490                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1491                         next_entry, logsize);
1492                 next_entry = logsize;
1493         }
1494
1495         size = num_wraps ? capacity : next_entry;
1496
1497         /* bail out if nothing in log */
1498         if (size == 0) {
1499                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1500                 return pos;
1501         }
1502
1503         /* enable/disable bt channel inhibition */
1504         priv->bt_ch_announce = iwlagn_bt_ch_announce;
1505
1506 #ifdef CONFIG_IWLWIFI_DEBUG
1507         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1508                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1509                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1510 #else
1511         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1512                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1513 #endif
1514         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1515                 size);
1516
1517 #ifdef CONFIG_IWLWIFI_DEBUG
1518         if (display) {
1519                 if (full_log)
1520                         bufsz = capacity * 48;
1521                 else
1522                         bufsz = size * 48;
1523                 *buf = kmalloc(bufsz, GFP_KERNEL);
1524                 if (!*buf)
1525                         return -ENOMEM;
1526         }
1527         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1528                 /*
1529                  * if uCode has wrapped back to top of log,
1530                  * start at the oldest entry,
1531                  * i.e the next one that uCode would fill.
1532                  */
1533                 if (num_wraps)
1534                         pos = iwl_print_event_log(priv, next_entry,
1535                                                 capacity - next_entry, mode,
1536                                                 pos, buf, bufsz);
1537                 /* (then/else) start at top of log */
1538                 pos = iwl_print_event_log(priv, 0,
1539                                           next_entry, mode, pos, buf, bufsz);
1540         } else
1541                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1542                                                 next_entry, size, mode,
1543                                                 pos, buf, bufsz);
1544 #else
1545         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1546                                         next_entry, size, mode,
1547                                         pos, buf, bufsz);
1548 #endif
1549         return pos;
1550 }
1551
1552 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1553 {
1554         struct iwl_ct_kill_config cmd;
1555         struct iwl_ct_kill_throttling_config adv_cmd;
1556         unsigned long flags;
1557         int ret = 0;
1558
1559         spin_lock_irqsave(&priv->lock, flags);
1560         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1561                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1562         spin_unlock_irqrestore(&priv->lock, flags);
1563         priv->thermal_throttle.ct_kill_toggle = false;
1564
1565         if (priv->cfg->base_params->support_ct_kill_exit) {
1566                 adv_cmd.critical_temperature_enter =
1567                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1568                 adv_cmd.critical_temperature_exit =
1569                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1570
1571                 ret = trans_send_cmd_pdu(priv,
1572                                        REPLY_CT_KILL_CONFIG_CMD,
1573                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
1574                 if (ret)
1575                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1576                 else
1577                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1578                                         "succeeded, "
1579                                         "critical temperature enter is %d,"
1580                                         "exit is %d\n",
1581                                        priv->hw_params.ct_kill_threshold,
1582                                        priv->hw_params.ct_kill_exit_threshold);
1583         } else {
1584                 cmd.critical_temperature_R =
1585                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1586
1587                 ret = trans_send_cmd_pdu(priv,
1588                                        REPLY_CT_KILL_CONFIG_CMD,
1589                                        CMD_SYNC, sizeof(cmd), &cmd);
1590                 if (ret)
1591                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1592                 else
1593                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1594                                         "succeeded, "
1595                                         "critical temperature is %d\n",
1596                                         priv->hw_params.ct_kill_threshold);
1597         }
1598 }
1599
1600 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1601 {
1602         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1603         struct iwl_host_cmd cmd = {
1604                 .id = CALIBRATION_CFG_CMD,
1605                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1606                 .data = { &calib_cfg_cmd, },
1607         };
1608
1609         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1610         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1611         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1612
1613         return trans_send_cmd(priv, &cmd);
1614 }
1615
1616
1617 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
1618 {
1619         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
1620           .valid = cpu_to_le32(valid_tx_ant),
1621         };
1622
1623         if (IWL_UCODE_API(priv->ucode_ver) > 1) {
1624                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
1625                 return trans_send_cmd_pdu(priv,
1626                                         TX_ANT_CONFIGURATION_CMD,
1627                                         CMD_SYNC,
1628                                         sizeof(struct iwl_tx_ant_config_cmd),
1629                                         &tx_ant_cmd);
1630         } else {
1631                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
1632                 return -EOPNOTSUPP;
1633         }
1634 }
1635
1636 /**
1637  * iwl_alive_start - called after REPLY_ALIVE notification received
1638  *                   from protocol/runtime uCode (initialization uCode's
1639  *                   Alive gets handled by iwl_init_alive_start()).
1640  */
1641 int iwl_alive_start(struct iwl_priv *priv)
1642 {
1643         int ret = 0;
1644         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1645
1646         /*TODO: this should go to the transport layer */
1647         iwl_reset_ict(priv);
1648
1649         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1650
1651         /* After the ALIVE response, we can send host commands to the uCode */
1652         set_bit(STATUS_ALIVE, &priv->status);
1653
1654         /* Enable watchdog to monitor the driver tx queues */
1655         iwl_setup_watchdog(priv);
1656
1657         if (iwl_is_rfkill(priv))
1658                 return -ERFKILL;
1659
1660         /* download priority table before any calibration request */
1661         if (priv->cfg->bt_params &&
1662             priv->cfg->bt_params->advanced_bt_coexist) {
1663                 /* Configure Bluetooth device coexistence support */
1664                 if (priv->cfg->bt_params->bt_sco_disable)
1665                         priv->bt_enable_pspoll = false;
1666                 else
1667                         priv->bt_enable_pspoll = true;
1668
1669                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1670                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1671                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1672                 iwlagn_send_advance_bt_config(priv);
1673                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
1674                 priv->cur_rssi_ctx = NULL;
1675
1676                 iwlagn_send_prio_tbl(priv);
1677
1678                 /* FIXME: w/a to force change uCode BT state machine */
1679                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
1680                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
1681                 if (ret)
1682                         return ret;
1683                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
1684                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
1685                 if (ret)
1686                         return ret;
1687         } else {
1688                 /*
1689                  * default is 2-wire BT coexexistence support
1690                  */
1691                 iwl_send_bt_config(priv);
1692         }
1693
1694         if (priv->hw_params.calib_rt_cfg)
1695                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
1696
1697         ieee80211_wake_queues(priv->hw);
1698
1699         priv->active_rate = IWL_RATES_MASK;
1700
1701         /* Configure Tx antenna selection based on H/W config */
1702         iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
1703
1704         if (iwl_is_associated_ctx(ctx)) {
1705                 struct iwl_rxon_cmd *active_rxon =
1706                                 (struct iwl_rxon_cmd *)&ctx->active;
1707                 /* apply any changes in staging */
1708                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1709                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1710         } else {
1711                 struct iwl_rxon_context *tmp;
1712                 /* Initialize our rx_config data */
1713                 for_each_context(priv, tmp)
1714                         iwl_connection_init_rx_config(priv, tmp);
1715
1716                 iwlagn_set_rxon_chain(priv, ctx);
1717         }
1718
1719         iwl_reset_run_time_calib(priv);
1720
1721         set_bit(STATUS_READY, &priv->status);
1722
1723         /* Configure the adapter for unassociated operation */
1724         ret = iwlagn_commit_rxon(priv, ctx);
1725         if (ret)
1726                 return ret;
1727
1728         /* At this point, the NIC is initialized and operational */
1729         iwl_rf_kill_ct_config(priv);
1730
1731         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1732
1733         return iwl_power_update_mode(priv, true);
1734 }
1735
1736 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1737
1738 static void __iwl_down(struct iwl_priv *priv)
1739 {
1740         int exit_pending;
1741
1742         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1743
1744         iwl_scan_cancel_timeout(priv, 200);
1745
1746         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
1747
1748         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
1749          * to prevent rearm timer */
1750         del_timer_sync(&priv->watchdog);
1751
1752         iwl_clear_ucode_stations(priv, NULL);
1753         iwl_dealloc_bcast_stations(priv);
1754         iwl_clear_driver_stations(priv);
1755
1756         /* reset BT coex data */
1757         priv->bt_status = 0;
1758         priv->cur_rssi_ctx = NULL;
1759         priv->bt_is_sco = 0;
1760         if (priv->cfg->bt_params)
1761                 priv->bt_traffic_load =
1762                          priv->cfg->bt_params->bt_init_traffic_load;
1763         else
1764                 priv->bt_traffic_load = 0;
1765         priv->bt_full_concurrent = false;
1766         priv->bt_ci_compliance = 0;
1767
1768         /* Wipe out the EXIT_PENDING status bit if we are not actually
1769          * exiting the module */
1770         if (!exit_pending)
1771                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1772
1773         if (priv->mac80211_registered)
1774                 ieee80211_stop_queues(priv->hw);
1775
1776         /* Clear out all status bits but a few that are stable across reset */
1777         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1778                                 STATUS_RF_KILL_HW |
1779                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1780                                 STATUS_GEO_CONFIGURED |
1781                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1782                                 STATUS_FW_ERROR |
1783                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1784                                 STATUS_EXIT_PENDING;
1785
1786         trans_stop_device(priv);
1787
1788         dev_kfree_skb(priv->beacon_skb);
1789         priv->beacon_skb = NULL;
1790 }
1791
1792 static void iwl_down(struct iwl_priv *priv)
1793 {
1794         mutex_lock(&priv->mutex);
1795         __iwl_down(priv);
1796         mutex_unlock(&priv->mutex);
1797
1798         iwl_cancel_deferred_work(priv);
1799 }
1800
1801 #define MAX_HW_RESTARTS 5
1802
1803 static int __iwl_up(struct iwl_priv *priv)
1804 {
1805         struct iwl_rxon_context *ctx;
1806         int ret;
1807
1808         lockdep_assert_held(&priv->mutex);
1809
1810         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1811                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1812                 return -EIO;
1813         }
1814
1815         for_each_context(priv, ctx) {
1816                 ret = iwlagn_alloc_bcast_station(priv, ctx);
1817                 if (ret) {
1818                         iwl_dealloc_bcast_stations(priv);
1819                         return ret;
1820                 }
1821         }
1822
1823         ret = iwlagn_run_init_ucode(priv);
1824         if (ret) {
1825                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
1826                 goto error;
1827         }
1828
1829         ret = iwlagn_load_ucode_wait_alive(priv,
1830                                            &priv->ucode_rt,
1831                                            IWL_UCODE_REGULAR);
1832         if (ret) {
1833                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
1834                 goto error;
1835         }
1836
1837         ret = iwl_alive_start(priv);
1838         if (ret)
1839                 goto error;
1840         return 0;
1841
1842  error:
1843         set_bit(STATUS_EXIT_PENDING, &priv->status);
1844         __iwl_down(priv);
1845         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1846
1847         IWL_ERR(priv, "Unable to initialize device.\n");
1848         return ret;
1849 }
1850
1851
1852 /*****************************************************************************
1853  *
1854  * Workqueue callbacks
1855  *
1856  *****************************************************************************/
1857
1858 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1859 {
1860         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1861                         run_time_calib_work);
1862
1863         mutex_lock(&priv->mutex);
1864
1865         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1866             test_bit(STATUS_SCANNING, &priv->status)) {
1867                 mutex_unlock(&priv->mutex);
1868                 return;
1869         }
1870
1871         if (priv->start_calib) {
1872                 iwl_chain_noise_calibration(priv);
1873                 iwl_sensitivity_calibration(priv);
1874         }
1875
1876         mutex_unlock(&priv->mutex);
1877 }
1878
1879 static void iwlagn_prepare_restart(struct iwl_priv *priv)
1880 {
1881         struct iwl_rxon_context *ctx;
1882         bool bt_full_concurrent;
1883         u8 bt_ci_compliance;
1884         u8 bt_load;
1885         u8 bt_status;
1886         bool bt_is_sco;
1887
1888         lockdep_assert_held(&priv->mutex);
1889
1890         for_each_context(priv, ctx)
1891                 ctx->vif = NULL;
1892         priv->is_open = 0;
1893
1894         /*
1895          * __iwl_down() will clear the BT status variables,
1896          * which is correct, but when we restart we really
1897          * want to keep them so restore them afterwards.
1898          *
1899          * The restart process will later pick them up and
1900          * re-configure the hw when we reconfigure the BT
1901          * command.
1902          */
1903         bt_full_concurrent = priv->bt_full_concurrent;
1904         bt_ci_compliance = priv->bt_ci_compliance;
1905         bt_load = priv->bt_traffic_load;
1906         bt_status = priv->bt_status;
1907         bt_is_sco = priv->bt_is_sco;
1908
1909         __iwl_down(priv);
1910
1911         priv->bt_full_concurrent = bt_full_concurrent;
1912         priv->bt_ci_compliance = bt_ci_compliance;
1913         priv->bt_traffic_load = bt_load;
1914         priv->bt_status = bt_status;
1915         priv->bt_is_sco = bt_is_sco;
1916 }
1917
1918 static void iwl_bg_restart(struct work_struct *data)
1919 {
1920         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1921
1922         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1923                 return;
1924
1925         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1926                 mutex_lock(&priv->mutex);
1927                 iwlagn_prepare_restart(priv);
1928                 mutex_unlock(&priv->mutex);
1929                 iwl_cancel_deferred_work(priv);
1930                 ieee80211_restart_hw(priv->hw);
1931         } else {
1932                 WARN_ON(1);
1933         }
1934 }
1935
1936 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
1937                                  struct ieee80211_channel *chan,
1938                                  enum nl80211_channel_type channel_type,
1939                                  unsigned int wait)
1940 {
1941         struct iwl_priv *priv = hw->priv;
1942         int ret;
1943
1944         /* Not supported if we don't have PAN */
1945         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
1946                 ret = -EOPNOTSUPP;
1947                 goto free;
1948         }
1949
1950         /* Not supported on pre-P2P firmware */
1951         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
1952                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
1953                 ret = -EOPNOTSUPP;
1954                 goto free;
1955         }
1956
1957         mutex_lock(&priv->mutex);
1958
1959         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
1960                 /*
1961                  * If the PAN context is free, use the normal
1962                  * way of doing remain-on-channel offload + TX.
1963                  */
1964                 ret = 1;
1965                 goto out;
1966         }
1967
1968         /* TODO: queue up if scanning? */
1969         if (test_bit(STATUS_SCANNING, &priv->status) ||
1970             priv->_agn.offchan_tx_skb) {
1971                 ret = -EBUSY;
1972                 goto out;
1973         }
1974
1975         /*
1976          * max_scan_ie_len doesn't include the blank SSID or the header,
1977          * so need to add that again here.
1978          */
1979         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
1980                 ret = -ENOBUFS;
1981                 goto out;
1982         }
1983
1984         priv->_agn.offchan_tx_skb = skb;
1985         priv->_agn.offchan_tx_timeout = wait;
1986         priv->_agn.offchan_tx_chan = chan;
1987
1988         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
1989                                 IWL_SCAN_OFFCH_TX, chan->band);
1990         if (ret)
1991                 priv->_agn.offchan_tx_skb = NULL;
1992  out:
1993         mutex_unlock(&priv->mutex);
1994  free:
1995         if (ret < 0)
1996                 kfree_skb(skb);
1997
1998         return ret;
1999 }
2000
2001 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2002 {
2003         struct iwl_priv *priv = hw->priv;
2004         int ret;
2005
2006         mutex_lock(&priv->mutex);
2007
2008         if (!priv->_agn.offchan_tx_skb) {
2009                 ret = -EINVAL;
2010                 goto unlock;
2011         }
2012
2013         priv->_agn.offchan_tx_skb = NULL;
2014
2015         ret = iwl_scan_cancel_timeout(priv, 200);
2016         if (ret)
2017                 ret = -EIO;
2018 unlock:
2019         mutex_unlock(&priv->mutex);
2020
2021         return ret;
2022 }
2023
2024 /*****************************************************************************
2025  *
2026  * mac80211 entry point functions
2027  *
2028  *****************************************************************************/
2029
2030 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2031         {
2032                 .max = 1,
2033                 .types = BIT(NL80211_IFTYPE_STATION),
2034         },
2035         {
2036                 .max = 1,
2037                 .types = BIT(NL80211_IFTYPE_AP),
2038         },
2039 };
2040
2041 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2042         {
2043                 .max = 2,
2044                 .types = BIT(NL80211_IFTYPE_STATION),
2045         },
2046 };
2047
2048 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2049         {
2050                 .max = 1,
2051                 .types = BIT(NL80211_IFTYPE_STATION),
2052         },
2053         {
2054                 .max = 1,
2055                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2056                          BIT(NL80211_IFTYPE_AP),
2057         },
2058 };
2059
2060 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2061         {
2062                 .max = 2,
2063                 .types = BIT(NL80211_IFTYPE_STATION),
2064         },
2065         {
2066                 .max = 1,
2067                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2068         },
2069 };
2070
2071 static const struct ieee80211_iface_combination
2072 iwlagn_iface_combinations_dualmode[] = {
2073         { .num_different_channels = 1,
2074           .max_interfaces = 2,
2075           .beacon_int_infra_match = true,
2076           .limits = iwlagn_sta_ap_limits,
2077           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2078         },
2079         { .num_different_channels = 1,
2080           .max_interfaces = 2,
2081           .limits = iwlagn_2sta_limits,
2082           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2083         },
2084 };
2085
2086 static const struct ieee80211_iface_combination
2087 iwlagn_iface_combinations_p2p[] = {
2088         { .num_different_channels = 1,
2089           .max_interfaces = 2,
2090           .beacon_int_infra_match = true,
2091           .limits = iwlagn_p2p_sta_go_limits,
2092           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2093         },
2094         { .num_different_channels = 1,
2095           .max_interfaces = 2,
2096           .limits = iwlagn_p2p_2sta_limits,
2097           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2098         },
2099 };
2100
2101 /*
2102  * Not a mac80211 entry point function, but it fits in with all the
2103  * other mac80211 functions grouped here.
2104  */
2105 static int iwl_mac_setup_register(struct iwl_priv *priv,
2106                                   struct iwlagn_ucode_capabilities *capa)
2107 {
2108         int ret;
2109         struct ieee80211_hw *hw = priv->hw;
2110         struct iwl_rxon_context *ctx;
2111
2112         hw->rate_control_algorithm = "iwl-agn-rs";
2113
2114         /* Tell mac80211 our characteristics */
2115         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2116                     IEEE80211_HW_AMPDU_AGGREGATION |
2117                     IEEE80211_HW_NEED_DTIM_PERIOD |
2118                     IEEE80211_HW_SPECTRUM_MGMT |
2119                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2120
2121         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2122
2123         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2124                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2125
2126         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2127                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2128                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2129
2130         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2131                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2132
2133         hw->sta_data_size = sizeof(struct iwl_station_priv);
2134         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2135
2136         for_each_context(priv, ctx) {
2137                 hw->wiphy->interface_modes |= ctx->interface_modes;
2138                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2139         }
2140
2141         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2142
2143         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2144                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2145                 hw->wiphy->n_iface_combinations =
2146                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2147         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2148                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2149                 hw->wiphy->n_iface_combinations =
2150                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2151         }
2152
2153         hw->wiphy->max_remain_on_channel_duration = 1000;
2154
2155         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2156                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2157                             WIPHY_FLAG_IBSS_RSN;
2158
2159         if (iwlagn_mod_params.power_save)
2160                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2161         else
2162                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2163
2164         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2165         /* we create the 802.11 header and a zero-length SSID element */
2166         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2167
2168         /* Default value; 4 EDCA QOS priorities */
2169         hw->queues = 4;
2170
2171         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2172
2173         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2174                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2175                         &priv->bands[IEEE80211_BAND_2GHZ];
2176         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2177                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2178                         &priv->bands[IEEE80211_BAND_5GHZ];
2179
2180         iwl_leds_init(priv);
2181
2182         ret = ieee80211_register_hw(priv->hw);
2183         if (ret) {
2184                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2185                 return ret;
2186         }
2187         priv->mac80211_registered = 1;
2188
2189         return 0;
2190 }
2191
2192
2193 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2194 {
2195         struct iwl_priv *priv = hw->priv;
2196         int ret;
2197
2198         IWL_DEBUG_MAC80211(priv, "enter\n");
2199
2200         /* we should be verifying the device is ready to be opened */
2201         mutex_lock(&priv->mutex);
2202         ret = __iwl_up(priv);
2203         mutex_unlock(&priv->mutex);
2204         if (ret)
2205                 return ret;
2206
2207         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2208
2209         /* Now we should be done, and the READY bit should be set. */
2210         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2211                 ret = -EIO;
2212
2213         iwlagn_led_enable(priv);
2214
2215         priv->is_open = 1;
2216         IWL_DEBUG_MAC80211(priv, "leave\n");
2217         return 0;
2218 }
2219
2220 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2221 {
2222         struct iwl_priv *priv = hw->priv;
2223
2224         IWL_DEBUG_MAC80211(priv, "enter\n");
2225
2226         if (!priv->is_open)
2227                 return;
2228
2229         priv->is_open = 0;
2230
2231         iwl_down(priv);
2232
2233         flush_workqueue(priv->workqueue);
2234
2235         /* User space software may expect getting rfkill changes
2236          * even if interface is down */
2237         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2238         iwl_enable_rfkill_int(priv);
2239
2240         IWL_DEBUG_MAC80211(priv, "leave\n");
2241 }
2242
2243 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2244 {
2245         struct iwl_priv *priv = hw->priv;
2246
2247         IWL_DEBUG_MACDUMP(priv, "enter\n");
2248
2249         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2250                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2251
2252         if (iwlagn_tx_skb(priv, skb))
2253                 dev_kfree_skb_any(skb);
2254
2255         IWL_DEBUG_MACDUMP(priv, "leave\n");
2256 }
2257
2258 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2259                                        struct ieee80211_vif *vif,
2260                                        struct ieee80211_key_conf *keyconf,
2261                                        struct ieee80211_sta *sta,
2262                                        u32 iv32, u16 *phase1key)
2263 {
2264         struct iwl_priv *priv = hw->priv;
2265         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2266
2267         IWL_DEBUG_MAC80211(priv, "enter\n");
2268
2269         iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2270                             iv32, phase1key);
2271
2272         IWL_DEBUG_MAC80211(priv, "leave\n");
2273 }
2274
2275 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2276                               struct ieee80211_vif *vif,
2277                               struct ieee80211_sta *sta,
2278                               struct ieee80211_key_conf *key)
2279 {
2280         struct iwl_priv *priv = hw->priv;
2281         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2282         struct iwl_rxon_context *ctx = vif_priv->ctx;
2283         int ret;
2284         u8 sta_id;
2285         bool is_default_wep_key = false;
2286
2287         IWL_DEBUG_MAC80211(priv, "enter\n");
2288
2289         if (iwlagn_mod_params.sw_crypto) {
2290                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2291                 return -EOPNOTSUPP;
2292         }
2293
2294         /*
2295          * To support IBSS RSN, don't program group keys in IBSS, the
2296          * hardware will then not attempt to decrypt the frames.
2297          */
2298         if (vif->type == NL80211_IFTYPE_ADHOC &&
2299             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2300                 return -EOPNOTSUPP;
2301
2302         sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2303         if (sta_id == IWL_INVALID_STATION)
2304                 return -EINVAL;
2305
2306         mutex_lock(&priv->mutex);
2307         iwl_scan_cancel_timeout(priv, 100);
2308
2309         /*
2310          * If we are getting WEP group key and we didn't receive any key mapping
2311          * so far, we are in legacy wep mode (group key only), otherwise we are
2312          * in 1X mode.
2313          * In legacy wep mode, we use another host command to the uCode.
2314          */
2315         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2316              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2317             !sta) {
2318                 if (cmd == SET_KEY)
2319                         is_default_wep_key = !ctx->key_mapping_keys;
2320                 else
2321                         is_default_wep_key =
2322                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2323         }
2324
2325         switch (cmd) {
2326         case SET_KEY:
2327                 if (is_default_wep_key)
2328                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2329                 else
2330                         ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2331                                                   key, sta_id);
2332
2333                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2334                 break;
2335         case DISABLE_KEY:
2336                 if (is_default_wep_key)
2337                         ret = iwl_remove_default_wep_key(priv, ctx, key);
2338                 else
2339                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2340
2341                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2342                 break;
2343         default:
2344                 ret = -EINVAL;
2345         }
2346
2347         mutex_unlock(&priv->mutex);
2348         IWL_DEBUG_MAC80211(priv, "leave\n");
2349
2350         return ret;
2351 }
2352
2353 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2354                                    struct ieee80211_vif *vif,
2355                                    enum ieee80211_ampdu_mlme_action action,
2356                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2357                                    u8 buf_size)
2358 {
2359         struct iwl_priv *priv = hw->priv;
2360         int ret = -EINVAL;
2361         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2362
2363         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2364                      sta->addr, tid);
2365
2366         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2367                 return -EACCES;
2368
2369         mutex_lock(&priv->mutex);
2370
2371         switch (action) {
2372         case IEEE80211_AMPDU_RX_START:
2373                 IWL_DEBUG_HT(priv, "start Rx\n");
2374                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2375                 break;
2376         case IEEE80211_AMPDU_RX_STOP:
2377                 IWL_DEBUG_HT(priv, "stop Rx\n");
2378                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2379                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2380                         ret = 0;
2381                 break;
2382         case IEEE80211_AMPDU_TX_START:
2383                 IWL_DEBUG_HT(priv, "start Tx\n");
2384                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2385                 if (ret == 0) {
2386                         priv->_agn.agg_tids_count++;
2387                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2388                                      priv->_agn.agg_tids_count);
2389                 }
2390                 break;
2391         case IEEE80211_AMPDU_TX_STOP:
2392                 IWL_DEBUG_HT(priv, "stop Tx\n");
2393                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2394                 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2395                         priv->_agn.agg_tids_count--;
2396                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2397                                      priv->_agn.agg_tids_count);
2398                 }
2399                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2400                         ret = 0;
2401                 if (priv->cfg->ht_params &&
2402                     priv->cfg->ht_params->use_rts_for_aggregation) {
2403                         /*
2404                          * switch off RTS/CTS if it was previously enabled
2405                          */
2406                         sta_priv->lq_sta.lq.general_params.flags &=
2407                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2408                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2409                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2410                 }
2411                 break;
2412         case IEEE80211_AMPDU_TX_OPERATIONAL:
2413                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2414
2415                 trans_txq_agg_setup(priv, iwl_sta_id(sta), tid, buf_size);
2416
2417                 /*
2418                  * If the limit is 0, then it wasn't initialised yet,
2419                  * use the default. We can do that since we take the
2420                  * minimum below, and we don't want to go above our
2421                  * default due to hardware restrictions.
2422                  */
2423                 if (sta_priv->max_agg_bufsize == 0)
2424                         sta_priv->max_agg_bufsize =
2425                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2426
2427                 /*
2428                  * Even though in theory the peer could have different
2429                  * aggregation reorder buffer sizes for different sessions,
2430                  * our ucode doesn't allow for that and has a global limit
2431                  * for each station. Therefore, use the minimum of all the
2432                  * aggregation sessions and our default value.
2433                  */
2434                 sta_priv->max_agg_bufsize =
2435                         min(sta_priv->max_agg_bufsize, buf_size);
2436
2437                 if (priv->cfg->ht_params &&
2438                     priv->cfg->ht_params->use_rts_for_aggregation) {
2439                         /*
2440                          * switch to RTS/CTS if it is the prefer protection
2441                          * method for HT traffic
2442                          */
2443
2444                         sta_priv->lq_sta.lq.general_params.flags |=
2445                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2446                 }
2447
2448                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2449                         sta_priv->max_agg_bufsize;
2450
2451                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2452                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2453
2454                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2455                          sta->addr, tid);
2456                 ret = 0;
2457                 break;
2458         }
2459         mutex_unlock(&priv->mutex);
2460
2461         return ret;
2462 }
2463
2464 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2465                               struct ieee80211_vif *vif,
2466                               struct ieee80211_sta *sta)
2467 {
2468         struct iwl_priv *priv = hw->priv;
2469         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2470         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2471         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2472         int ret;
2473         u8 sta_id;
2474
2475         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2476                         sta->addr);
2477         mutex_lock(&priv->mutex);
2478         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2479                         sta->addr);
2480         sta_priv->common.sta_id = IWL_INVALID_STATION;
2481
2482         atomic_set(&sta_priv->pending_frames, 0);
2483         if (vif->type == NL80211_IFTYPE_AP)
2484                 sta_priv->client = true;
2485
2486         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2487                                      is_ap, sta, &sta_id);
2488         if (ret) {
2489                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2490                         sta->addr, ret);
2491                 /* Should we return success if return code is EEXIST ? */
2492                 mutex_unlock(&priv->mutex);
2493                 return ret;
2494         }
2495
2496         sta_priv->common.sta_id = sta_id;
2497
2498         /* Initialize rate scaling */
2499         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2500                        sta->addr);
2501         iwl_rs_rate_init(priv, sta, sta_id);
2502         mutex_unlock(&priv->mutex);
2503
2504         return 0;
2505 }
2506
2507 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2508                                 struct ieee80211_channel_switch *ch_switch)
2509 {
2510         struct iwl_priv *priv = hw->priv;
2511         const struct iwl_channel_info *ch_info;
2512         struct ieee80211_conf *conf = &hw->conf;
2513         struct ieee80211_channel *channel = ch_switch->channel;
2514         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2515         /*
2516          * MULTI-FIXME
2517          * When we add support for multiple interfaces, we need to
2518          * revisit this. The channel switch command in the device
2519          * only affects the BSS context, but what does that really
2520          * mean? And what if we get a CSA on the second interface?
2521          * This needs a lot of work.
2522          */
2523         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2524         u16 ch;
2525
2526         IWL_DEBUG_MAC80211(priv, "enter\n");
2527
2528         mutex_lock(&priv->mutex);
2529
2530         if (iwl_is_rfkill(priv))
2531                 goto out;
2532
2533         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2534             test_bit(STATUS_SCANNING, &priv->status) ||
2535             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2536                 goto out;
2537
2538         if (!iwl_is_associated_ctx(ctx))
2539                 goto out;
2540
2541         if (!priv->cfg->lib->set_channel_switch)
2542                 goto out;
2543
2544         ch = channel->hw_value;
2545         if (le16_to_cpu(ctx->active.channel) == ch)
2546                 goto out;
2547
2548         ch_info = iwl_get_channel_info(priv, channel->band, ch);
2549         if (!is_channel_valid(ch_info)) {
2550                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2551                 goto out;
2552         }
2553
2554         spin_lock_irq(&priv->lock);
2555
2556         priv->current_ht_config.smps = conf->smps_mode;
2557
2558         /* Configure HT40 channels */
2559         ctx->ht.enabled = conf_is_ht(conf);
2560         if (ctx->ht.enabled) {
2561                 if (conf_is_ht40_minus(conf)) {
2562                         ctx->ht.extension_chan_offset =
2563                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2564                         ctx->ht.is_40mhz = true;
2565                 } else if (conf_is_ht40_plus(conf)) {
2566                         ctx->ht.extension_chan_offset =
2567                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2568                         ctx->ht.is_40mhz = true;
2569                 } else {
2570                         ctx->ht.extension_chan_offset =
2571                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2572                         ctx->ht.is_40mhz = false;
2573                 }
2574         } else
2575                 ctx->ht.is_40mhz = false;
2576
2577         if ((le16_to_cpu(ctx->staging.channel) != ch))
2578                 ctx->staging.flags = 0;
2579
2580         iwl_set_rxon_channel(priv, channel, ctx);
2581         iwl_set_rxon_ht(priv, ht_conf);
2582         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2583
2584         spin_unlock_irq(&priv->lock);
2585
2586         iwl_set_rate(priv);
2587         /*
2588          * at this point, staging_rxon has the
2589          * configuration for channel switch
2590          */
2591         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2592         priv->switch_channel = cpu_to_le16(ch);
2593         if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
2594                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2595                 priv->switch_channel = 0;
2596                 ieee80211_chswitch_done(ctx->vif, false);
2597         }
2598
2599 out:
2600         mutex_unlock(&priv->mutex);
2601         IWL_DEBUG_MAC80211(priv, "leave\n");
2602 }
2603
2604 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
2605                                     unsigned int changed_flags,
2606                                     unsigned int *total_flags,
2607                                     u64 multicast)
2608 {
2609         struct iwl_priv *priv = hw->priv;
2610         __le32 filter_or = 0, filter_nand = 0;
2611         struct iwl_rxon_context *ctx;
2612
2613 #define CHK(test, flag) do { \
2614         if (*total_flags & (test))              \
2615                 filter_or |= (flag);            \
2616         else                                    \
2617                 filter_nand |= (flag);          \
2618         } while (0)
2619
2620         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
2621                         changed_flags, *total_flags);
2622
2623         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
2624         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
2625         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
2626         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
2627
2628 #undef CHK
2629
2630         mutex_lock(&priv->mutex);
2631
2632         for_each_context(priv, ctx) {
2633                 ctx->staging.filter_flags &= ~filter_nand;
2634                 ctx->staging.filter_flags |= filter_or;
2635
2636                 /*
2637                  * Not committing directly because hardware can perform a scan,
2638                  * but we'll eventually commit the filter flags change anyway.
2639                  */
2640         }
2641
2642         mutex_unlock(&priv->mutex);
2643
2644         /*
2645          * Receiving all multicast frames is always enabled by the
2646          * default flags setup in iwl_connection_init_rx_config()
2647          * since we currently do not support programming multicast
2648          * filters into the device.
2649          */
2650         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
2651                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
2652 }
2653
2654 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
2655 {
2656         struct iwl_priv *priv = hw->priv;
2657
2658         mutex_lock(&priv->mutex);
2659         IWL_DEBUG_MAC80211(priv, "enter\n");
2660
2661         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2662                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
2663                 goto done;
2664         }
2665         if (iwl_is_rfkill(priv)) {
2666                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
2667                 goto done;
2668         }
2669
2670         /*
2671          * mac80211 will not push any more frames for transmit
2672          * until the flush is completed
2673          */
2674         if (drop) {
2675                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
2676                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
2677                         IWL_ERR(priv, "flush request fail\n");
2678                         goto done;
2679                 }
2680         }
2681         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
2682         iwlagn_wait_tx_queue_empty(priv);
2683 done:
2684         mutex_unlock(&priv->mutex);
2685         IWL_DEBUG_MAC80211(priv, "leave\n");
2686 }
2687
2688 static void iwlagn_disable_roc(struct iwl_priv *priv)
2689 {
2690         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
2691         struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
2692
2693         lockdep_assert_held(&priv->mutex);
2694
2695         if (!ctx->is_active)
2696                 return;
2697
2698         ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
2699         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2700         iwl_set_rxon_channel(priv, chan, ctx);
2701         iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
2702
2703         priv->_agn.hw_roc_channel = NULL;
2704
2705         iwlagn_commit_rxon(priv, ctx);
2706
2707         ctx->is_active = false;
2708 }
2709
2710 static void iwlagn_bg_roc_done(struct work_struct *work)
2711 {
2712         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2713                                              _agn.hw_roc_work.work);
2714
2715         mutex_lock(&priv->mutex);
2716         ieee80211_remain_on_channel_expired(priv->hw);
2717         iwlagn_disable_roc(priv);
2718         mutex_unlock(&priv->mutex);
2719 }
2720
2721 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
2722                                      struct ieee80211_channel *channel,
2723                                      enum nl80211_channel_type channel_type,
2724                                      int duration)
2725 {
2726         struct iwl_priv *priv = hw->priv;
2727         int err = 0;
2728
2729         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
2730                 return -EOPNOTSUPP;
2731
2732         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2733                                         BIT(NL80211_IFTYPE_P2P_CLIENT)))
2734                 return -EOPNOTSUPP;
2735
2736         mutex_lock(&priv->mutex);
2737
2738         if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
2739             test_bit(STATUS_SCAN_HW, &priv->status)) {
2740                 err = -EBUSY;
2741                 goto out;
2742         }
2743
2744         priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
2745         priv->_agn.hw_roc_channel = channel;
2746         priv->_agn.hw_roc_chantype = channel_type;
2747         priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
2748         iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
2749         queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
2750                            msecs_to_jiffies(duration + 20));
2751
2752         msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
2753         ieee80211_ready_on_channel(priv->hw);
2754
2755  out:
2756         mutex_unlock(&priv->mutex);
2757
2758         return err;
2759 }
2760
2761 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
2762 {
2763         struct iwl_priv *priv = hw->priv;
2764
2765         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
2766                 return -EOPNOTSUPP;
2767
2768         cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
2769
2770         mutex_lock(&priv->mutex);
2771         iwlagn_disable_roc(priv);
2772         mutex_unlock(&priv->mutex);
2773
2774         return 0;
2775 }
2776
2777 /*****************************************************************************
2778  *
2779  * driver setup and teardown
2780  *
2781  *****************************************************************************/
2782
2783 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2784 {
2785         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2786
2787         init_waitqueue_head(&priv->wait_command_queue);
2788
2789         INIT_WORK(&priv->restart, iwl_bg_restart);
2790         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2791         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2792         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
2793         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
2794         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
2795         INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
2796
2797         iwl_setup_scan_deferred_work(priv);
2798
2799         if (priv->cfg->lib->bt_setup_deferred_work)
2800                 priv->cfg->lib->bt_setup_deferred_work(priv);
2801
2802         init_timer(&priv->statistics_periodic);
2803         priv->statistics_periodic.data = (unsigned long)priv;
2804         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2805
2806         init_timer(&priv->ucode_trace);
2807         priv->ucode_trace.data = (unsigned long)priv;
2808         priv->ucode_trace.function = iwl_bg_ucode_trace;
2809
2810         init_timer(&priv->watchdog);
2811         priv->watchdog.data = (unsigned long)priv;
2812         priv->watchdog.function = iwl_bg_watchdog;
2813 }
2814
2815 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2816 {
2817         if (priv->cfg->lib->cancel_deferred_work)
2818                 priv->cfg->lib->cancel_deferred_work(priv);
2819
2820         cancel_work_sync(&priv->run_time_calib_work);
2821         cancel_work_sync(&priv->beacon_update);
2822
2823         iwl_cancel_scan_deferred_work(priv);
2824
2825         cancel_work_sync(&priv->bt_full_concurrency);
2826         cancel_work_sync(&priv->bt_runtime_config);
2827
2828         del_timer_sync(&priv->statistics_periodic);
2829         del_timer_sync(&priv->ucode_trace);
2830 }
2831
2832 static void iwl_init_hw_rates(struct iwl_priv *priv,
2833                               struct ieee80211_rate *rates)
2834 {
2835         int i;
2836
2837         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
2838                 rates[i].bitrate = iwl_rates[i].ieee * 5;
2839                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2840                 rates[i].hw_value_short = i;
2841                 rates[i].flags = 0;
2842                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
2843                         /*
2844                          * If CCK != 1M then set short preamble rate flag.
2845                          */
2846                         rates[i].flags |=
2847                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
2848                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
2849                 }
2850         }
2851 }
2852
2853 static int iwl_init_drv(struct iwl_priv *priv)
2854 {
2855         int ret;
2856
2857         spin_lock_init(&priv->sta_lock);
2858         spin_lock_init(&priv->hcmd_lock);
2859
2860         mutex_init(&priv->mutex);
2861
2862         priv->ieee_channels = NULL;
2863         priv->ieee_rates = NULL;
2864         priv->band = IEEE80211_BAND_2GHZ;
2865
2866         priv->iw_mode = NL80211_IFTYPE_STATION;
2867         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
2868         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
2869         priv->_agn.agg_tids_count = 0;
2870
2871         /* initialize force reset */
2872         priv->force_reset[IWL_RF_RESET].reset_duration =
2873                 IWL_DELAY_NEXT_FORCE_RF_RESET;
2874         priv->force_reset[IWL_FW_RESET].reset_duration =
2875                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
2876
2877         priv->rx_statistics_jiffies = jiffies;
2878
2879         /* Choose which receivers/antennas to use */
2880         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
2881
2882         iwl_init_scan_params(priv);
2883
2884         /* init bt coex */
2885         if (priv->cfg->bt_params &&
2886             priv->cfg->bt_params->advanced_bt_coexist) {
2887                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2888                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2889                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2890                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
2891                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
2892                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
2893         }
2894
2895         ret = iwl_init_channel_map(priv);
2896         if (ret) {
2897                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
2898                 goto err;
2899         }
2900
2901         ret = iwlcore_init_geos(priv);
2902         if (ret) {
2903                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
2904                 goto err_free_channel_map;
2905         }
2906         iwl_init_hw_rates(priv, priv->ieee_rates);
2907
2908         return 0;
2909
2910 err_free_channel_map:
2911         iwl_free_channel_map(priv);
2912 err:
2913         return ret;
2914 }
2915
2916 static void iwl_uninit_drv(struct iwl_priv *priv)
2917 {
2918         iwl_calib_free_results(priv);
2919         iwlcore_free_geos(priv);
2920         iwl_free_channel_map(priv);
2921         kfree(priv->scan_cmd);
2922         kfree(priv->beacon_cmd);
2923 }
2924
2925 static void iwl_mac_rssi_callback(struct ieee80211_hw *hw,
2926                            enum ieee80211_rssi_event rssi_event)
2927 {
2928         struct iwl_priv *priv = hw->priv;
2929
2930         mutex_lock(&priv->mutex);
2931
2932         if (priv->cfg->bt_params &&
2933                         priv->cfg->bt_params->advanced_bt_coexist) {
2934                 if (rssi_event == RSSI_EVENT_LOW)
2935                         priv->bt_enable_pspoll = true;
2936                 else if (rssi_event == RSSI_EVENT_HIGH)
2937                         priv->bt_enable_pspoll = false;
2938
2939                 iwlagn_send_advance_bt_config(priv);
2940         } else {
2941                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
2942                                 "ignoring RSSI callback\n");
2943         }
2944
2945         mutex_unlock(&priv->mutex);
2946 }
2947
2948 struct ieee80211_ops iwlagn_hw_ops = {
2949         .tx = iwlagn_mac_tx,
2950         .start = iwlagn_mac_start,
2951         .stop = iwlagn_mac_stop,
2952         .add_interface = iwl_mac_add_interface,
2953         .remove_interface = iwl_mac_remove_interface,
2954         .change_interface = iwl_mac_change_interface,
2955         .config = iwlagn_mac_config,
2956         .configure_filter = iwlagn_configure_filter,
2957         .set_key = iwlagn_mac_set_key,
2958         .update_tkip_key = iwlagn_mac_update_tkip_key,
2959         .conf_tx = iwl_mac_conf_tx,
2960         .bss_info_changed = iwlagn_bss_info_changed,
2961         .ampdu_action = iwlagn_mac_ampdu_action,
2962         .hw_scan = iwl_mac_hw_scan,
2963         .sta_notify = iwlagn_mac_sta_notify,
2964         .sta_add = iwlagn_mac_sta_add,
2965         .sta_remove = iwl_mac_sta_remove,
2966         .channel_switch = iwlagn_mac_channel_switch,
2967         .flush = iwlagn_mac_flush,
2968         .tx_last_beacon = iwl_mac_tx_last_beacon,
2969         .remain_on_channel = iwl_mac_remain_on_channel,
2970         .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
2971         .offchannel_tx = iwl_mac_offchannel_tx,
2972         .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
2973         .rssi_callback = iwl_mac_rssi_callback,
2974         CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
2975         CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
2976 };
2977
2978 static u32 iwl_hw_detect(struct iwl_priv *priv)
2979 {
2980         return iwl_read32(priv, CSR_HW_REV);
2981 }
2982
2983 static int iwl_set_hw_params(struct iwl_priv *priv)
2984 {
2985         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2986         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2987         if (iwlagn_mod_params.amsdu_size_8K)
2988                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
2989         else
2990                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
2991
2992         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
2993
2994         if (iwlagn_mod_params.disable_11n)
2995                 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
2996
2997         /* Device-specific setup */
2998         return priv->cfg->lib->set_hw_params(priv);
2999 }
3000
3001 static const u8 iwlagn_bss_ac_to_fifo[] = {
3002         IWL_TX_FIFO_VO,
3003         IWL_TX_FIFO_VI,
3004         IWL_TX_FIFO_BE,
3005         IWL_TX_FIFO_BK,
3006 };
3007
3008 static const u8 iwlagn_bss_ac_to_queue[] = {
3009         0, 1, 2, 3,
3010 };
3011
3012 static const u8 iwlagn_pan_ac_to_fifo[] = {
3013         IWL_TX_FIFO_VO_IPAN,
3014         IWL_TX_FIFO_VI_IPAN,
3015         IWL_TX_FIFO_BE_IPAN,
3016         IWL_TX_FIFO_BK_IPAN,
3017 };
3018
3019 static const u8 iwlagn_pan_ac_to_queue[] = {
3020         7, 6, 5, 4,
3021 };
3022
3023 /* This function both allocates and initializes hw and priv. */
3024 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3025 {
3026         struct iwl_priv *priv;
3027         /* mac80211 allocates memory for this device instance, including
3028          *   space for this driver's private structure */
3029         struct ieee80211_hw *hw;
3030
3031         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3032         if (hw == NULL) {
3033                 pr_err("%s: Can not allocate network device\n",
3034                        cfg->name);
3035                 goto out;
3036         }
3037
3038         priv = hw->priv;
3039         priv->hw = hw;
3040
3041 out:
3042         return hw;
3043 }
3044
3045 static void iwl_init_context(struct iwl_priv *priv)
3046 {
3047         int i;
3048
3049         /*
3050          * The default context is always valid,
3051          * more may be discovered when firmware
3052          * is loaded.
3053          */
3054         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3055
3056         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3057                 priv->contexts[i].ctxid = i;
3058
3059         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3060         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3061         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3062         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3063         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3064         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3065         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3066         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3067         priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3068         priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3069         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3070                 BIT(NL80211_IFTYPE_ADHOC);
3071         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3072                 BIT(NL80211_IFTYPE_STATION);
3073         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3074         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3075         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3076         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3077
3078         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3079         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3080                 REPLY_WIPAN_RXON_TIMING;
3081         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3082                 REPLY_WIPAN_RXON_ASSOC;
3083         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3084         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3085         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3086         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3087         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3088         priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3089         priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3090         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3091         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3092                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3093 #ifdef CONFIG_IWL_P2P
3094         priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3095                 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3096 #endif
3097         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3098         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3099         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3100
3101         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3102 }
3103
3104 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3105                 struct iwl_cfg *cfg)
3106 {
3107         int err = 0;
3108         struct iwl_priv *priv;
3109         struct ieee80211_hw *hw;
3110         u16 num_mac;
3111         u32 hw_rev;
3112
3113         /************************
3114          * 1. Allocating HW data
3115          ************************/
3116         hw = iwl_alloc_all(cfg);
3117         if (!hw) {
3118                 err = -ENOMEM;
3119                 goto out;
3120         }
3121
3122         priv = hw->priv;
3123
3124         priv->bus.priv = priv;
3125         priv->bus.bus_specific = bus_specific;
3126         priv->bus.ops = bus_ops;
3127         priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3128         priv->bus.ops->set_drv_data(&priv->bus, priv);
3129         priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3130
3131         /* At this point both hw and priv are allocated. */
3132
3133         SET_IEEE80211_DEV(hw, priv->bus.dev);
3134
3135         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3136         priv->cfg = cfg;
3137         priv->inta_mask = CSR_INI_SET_MASK;
3138
3139         err = iwl_trans_register(priv);
3140         if (err)
3141                 goto out_free_priv;
3142
3143         /* is antenna coupling more than 35dB ? */
3144         priv->bt_ant_couple_ok =
3145                 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3146                 true : false;
3147
3148         /* enable/disable bt channel inhibition */
3149         priv->bt_ch_announce = iwlagn_bt_ch_announce;
3150         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3151                        (priv->bt_ch_announce) ? "On" : "Off");
3152
3153         if (iwl_alloc_traffic_mem(priv))
3154                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3155
3156
3157         /* these spin locks will be used in apm_ops.init and EEPROM access
3158          * we should init now
3159          */
3160         spin_lock_init(&priv->reg_lock);
3161         spin_lock_init(&priv->lock);
3162
3163         /*
3164          * stop and reset the on-board processor just in case it is in a
3165          * strange state ... like being left stranded by a primary kernel
3166          * and this is now the kdump kernel trying to start up
3167          */
3168         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3169
3170         /***********************
3171          * 3. Read REV register
3172          ***********************/
3173         hw_rev = iwl_hw_detect(priv);
3174         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3175                 priv->cfg->name, hw_rev);
3176
3177         if (trans_prepare_card_hw(priv)) {
3178                 err = -EIO;
3179                 IWL_WARN(priv, "Failed, HW not ready\n");
3180                 goto out_free_traffic_mem;
3181         }
3182
3183         /*****************
3184          * 4. Read EEPROM
3185          *****************/
3186         /* Read the EEPROM */
3187         err = iwl_eeprom_init(priv, hw_rev);
3188         if (err) {
3189                 IWL_ERR(priv, "Unable to init EEPROM\n");
3190                 goto out_free_traffic_mem;
3191         }
3192         err = iwl_eeprom_check_version(priv);
3193         if (err)
3194                 goto out_free_eeprom;
3195
3196         err = iwl_eeprom_check_sku(priv);
3197         if (err)
3198                 goto out_free_eeprom;
3199
3200         /* extract MAC Address */
3201         iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3202         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3203         priv->hw->wiphy->addresses = priv->addresses;
3204         priv->hw->wiphy->n_addresses = 1;
3205         num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3206         if (num_mac > 1) {
3207                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3208                        ETH_ALEN);
3209                 priv->addresses[1].addr[5]++;
3210                 priv->hw->wiphy->n_addresses++;
3211         }
3212
3213         /* initialize all valid contexts */
3214         iwl_init_context(priv);
3215
3216         /************************
3217          * 5. Setup HW constants
3218          ************************/
3219         if (iwl_set_hw_params(priv)) {
3220                 err = -ENOENT;
3221                 IWL_ERR(priv, "failed to set hw parameters\n");
3222                 goto out_free_eeprom;
3223         }
3224
3225         /*******************
3226          * 6. Setup priv
3227          *******************/
3228
3229         err = iwl_init_drv(priv);
3230         if (err)
3231                 goto out_free_eeprom;
3232         /* At this point both hw and priv are initialized. */
3233
3234         /********************
3235          * 7. Setup services
3236          ********************/
3237         iwl_setup_deferred_work(priv);
3238         iwl_setup_rx_handlers(priv);
3239         iwl_testmode_init(priv);
3240
3241         /*********************************************
3242          * 8. Enable interrupts
3243          *********************************************/
3244
3245         iwl_enable_rfkill_int(priv);
3246
3247         /* If platform's RF_KILL switch is NOT set to KILL */
3248         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3249                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3250         else
3251                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3252
3253         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3254                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3255
3256         iwl_power_initialize(priv);
3257         iwl_tt_initialize(priv);
3258
3259         init_completion(&priv->_agn.firmware_loading_complete);
3260
3261         err = iwl_request_firmware(priv, true);
3262         if (err)
3263                 goto out_destroy_workqueue;
3264
3265         return 0;
3266
3267 out_destroy_workqueue:
3268         destroy_workqueue(priv->workqueue);
3269         priv->workqueue = NULL;
3270         iwl_uninit_drv(priv);
3271 out_free_eeprom:
3272         iwl_eeprom_free(priv);
3273 out_free_traffic_mem:
3274         iwl_free_traffic_mem(priv);
3275         trans_free(priv);
3276 out_free_priv:
3277         ieee80211_free_hw(priv->hw);
3278 out:
3279         return err;
3280 }
3281
3282 void __devexit iwl_remove(struct iwl_priv * priv)
3283 {
3284         unsigned long flags;
3285
3286         wait_for_completion(&priv->_agn.firmware_loading_complete);
3287
3288         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3289
3290         iwl_dbgfs_unregister(priv);
3291         sysfs_remove_group(&priv->bus.dev->kobj,
3292                            &iwl_attribute_group);
3293
3294         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3295          * to be called and iwl_down since we are removing the device
3296          * we need to set STATUS_EXIT_PENDING bit.
3297          */
3298         set_bit(STATUS_EXIT_PENDING, &priv->status);
3299
3300         iwl_testmode_cleanup(priv);
3301         iwl_leds_exit(priv);
3302
3303         if (priv->mac80211_registered) {
3304                 ieee80211_unregister_hw(priv->hw);
3305                 priv->mac80211_registered = 0;
3306         }
3307
3308         /* Reset to low power before unloading driver. */
3309         iwl_apm_stop(priv);
3310
3311         iwl_tt_exit(priv);
3312
3313         /* make sure we flush any pending irq or
3314          * tasklet for the driver
3315          */
3316         spin_lock_irqsave(&priv->lock, flags);
3317         iwl_disable_interrupts(priv);
3318         spin_unlock_irqrestore(&priv->lock, flags);
3319
3320         trans_sync_irq(priv);
3321
3322         iwl_dealloc_ucode(priv);
3323
3324         trans_rx_free(priv);
3325         trans_tx_free(priv);
3326
3327         iwl_eeprom_free(priv);
3328
3329         /*netif_stop_queue(dev); */
3330         flush_workqueue(priv->workqueue);
3331
3332         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3333          * priv->workqueue... so we can't take down the workqueue
3334          * until now... */
3335         destroy_workqueue(priv->workqueue);
3336         priv->workqueue = NULL;
3337         iwl_free_traffic_mem(priv);
3338
3339         trans_free(priv);
3340
3341         priv->bus.ops->set_drv_data(&priv->bus, NULL);
3342
3343         iwl_uninit_drv(priv);
3344
3345         dev_kfree_skb(priv->beacon_skb);
3346
3347         ieee80211_free_hw(priv->hw);
3348 }
3349
3350
3351 /*****************************************************************************
3352  *
3353  * driver and module entry point
3354  *
3355  *****************************************************************************/
3356 static int __init iwl_init(void)
3357 {
3358
3359         int ret;
3360         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3361         pr_info(DRV_COPYRIGHT "\n");
3362
3363         ret = iwlagn_rate_control_register();
3364         if (ret) {
3365                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3366                 return ret;
3367         }
3368
3369         ret = iwl_pci_register_driver();
3370
3371         if (ret)
3372                 goto error_register;
3373         return ret;
3374
3375 error_register:
3376         iwlagn_rate_control_unregister();
3377         return ret;
3378 }
3379
3380 static void __exit iwl_exit(void)
3381 {
3382         iwl_pci_unregister_driver();
3383         iwlagn_rate_control_unregister();
3384 }
3385
3386 module_exit(iwl_exit);
3387 module_init(iwl_init);
3388
3389 #ifdef CONFIG_IWLWIFI_DEBUG
3390 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3391 MODULE_PARM_DESC(debug, "debug output mask");
3392 #endif
3393
3394 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3395 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3396 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3397 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3398 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3399 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3400 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3401                    int, S_IRUGO);
3402 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3403 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3404 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3405
3406 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3407                    S_IRUGO);
3408 MODULE_PARM_DESC(ucode_alternative,
3409                  "specify ucode alternative to use from ucode file");
3410
3411 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3412 MODULE_PARM_DESC(antenna_coupling,
3413                  "specify antenna coupling in dB (defualt: 0 dB)");
3414
3415 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3416 MODULE_PARM_DESC(bt_ch_inhibition,
3417                  "Disable BT channel inhibition (default: enable)");
3418
3419 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3420 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3421
3422 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3423 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3424
3425 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3426 MODULE_PARM_DESC(wd_disable,
3427                 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3428
3429 /*
3430  * set bt_coex_active to true, uCode will do kill/defer
3431  * every time the priority line is asserted (BT is sending signals on the
3432  * priority line in the PCIx).
3433  * set bt_coex_active to false, uCode will ignore the BT activity and
3434  * perform the normal operation
3435  *
3436  * User might experience transmit issue on some platform due to WiFi/BT
3437  * co-exist problem. The possible behaviors are:
3438  *   Able to scan and finding all the available AP
3439  *   Not able to associate with any AP
3440  * On those platforms, WiFi communication can be restored by set
3441  * "bt_coex_active" module parameter to "false"
3442  *
3443  * default: bt_coex_active = true (BT_COEX_ENABLE)
3444  */
3445 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3446                 bool, S_IRUGO);
3447 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3448
3449 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3450 MODULE_PARM_DESC(led_mode, "0=system default, "
3451                 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3452
3453 module_param_named(power_save, iwlagn_mod_params.power_save,
3454                 bool, S_IRUGO);
3455 MODULE_PARM_DESC(power_save,
3456                  "enable WiFi power management (default: disable)");
3457
3458 module_param_named(power_level, iwlagn_mod_params.power_level,
3459                 int, S_IRUGO);
3460 MODULE_PARM_DESC(power_level,
3461                  "default power save level (range from 1 - 5, default: 1)");
3462
3463 /*
3464  * For now, keep using power level 1 instead of automatically
3465  * adjusting ...
3466  */
3467 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3468                 bool, S_IRUGO);
3469 MODULE_PARM_DESC(no_sleep_autoadjust,
3470                  "don't automatically adjust sleep level "
3471                  "according to maximum network latency (default: true)");