Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.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         };
133         struct ieee80211_tx_info *info;
134         u32 frame_size;
135         u32 rate_flags;
136         u32 rate;
137
138         /*
139          * We have to set up the TX command, the TX Beacon command, and the
140          * beacon contents.
141          */
142
143         lockdep_assert_held(&priv->mutex);
144
145         if (!priv->beacon_ctx) {
146                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
147                 return 0;
148         }
149
150         if (WARN_ON(!priv->beacon_skb))
151                 return -EINVAL;
152
153         /* Allocate beacon command */
154         if (!priv->beacon_cmd)
155                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
156         tx_beacon_cmd = priv->beacon_cmd;
157         if (!tx_beacon_cmd)
158                 return -ENOMEM;
159
160         frame_size = priv->beacon_skb->len;
161
162         /* Set up TX command fields */
163         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
164         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
165         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
166         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
167                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
168
169         /* Set up TX beacon command fields */
170         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
171                            frame_size);
172
173         /* Set up packet rate and flags */
174         info = IEEE80211_SKB_CB(priv->beacon_skb);
175
176         /*
177          * Let's set up the rate at least somewhat correctly;
178          * it will currently not actually be used by the uCode,
179          * it uses the broadcast station's rate instead.
180          */
181         if (info->control.rates[0].idx < 0 ||
182             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
183                 rate = 0;
184         else
185                 rate = info->control.rates[0].idx;
186
187         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
188                                               priv->hw_params.valid_tx_ant);
189         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
190
191         /* In mac80211, rates for 5 GHz start at 0 */
192         if (info->band == IEEE80211_BAND_5GHZ)
193                 rate += IWL_FIRST_OFDM_RATE;
194         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
195                 rate_flags |= RATE_MCS_CCK_MSK;
196
197         tx_beacon_cmd->tx.rate_n_flags =
198                         iwl_hw_set_rate_n_flags(rate, rate_flags);
199
200         /* Submit command */
201         cmd.len[0] = sizeof(*tx_beacon_cmd);
202         cmd.data[0] = tx_beacon_cmd;
203         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
204         cmd.len[1] = frame_size;
205         cmd.data[1] = priv->beacon_skb->data;
206         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
207
208         return iwl_send_cmd_sync(priv, &cmd);
209 }
210
211 static void iwl_bg_beacon_update(struct work_struct *work)
212 {
213         struct iwl_priv *priv =
214                 container_of(work, struct iwl_priv, beacon_update);
215         struct sk_buff *beacon;
216
217         mutex_lock(&priv->mutex);
218         if (!priv->beacon_ctx) {
219                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
220                 goto out;
221         }
222
223         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
224                 /*
225                  * The ucode will send beacon notifications even in
226                  * IBSS mode, but we don't want to process them. But
227                  * we need to defer the type check to here due to
228                  * requiring locking around the beacon_ctx access.
229                  */
230                 goto out;
231         }
232
233         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
234         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
235         if (!beacon) {
236                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
237                 goto out;
238         }
239
240         /* new beacon skb is allocated every time; dispose previous.*/
241         dev_kfree_skb(priv->beacon_skb);
242
243         priv->beacon_skb = beacon;
244
245         iwlagn_send_beacon_cmd(priv);
246  out:
247         mutex_unlock(&priv->mutex);
248 }
249
250 static void iwl_bg_bt_runtime_config(struct work_struct *work)
251 {
252         struct iwl_priv *priv =
253                 container_of(work, struct iwl_priv, bt_runtime_config);
254
255         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
256                 return;
257
258         /* dont send host command if rf-kill is on */
259         if (!iwl_is_ready_rf(priv))
260                 return;
261         iwlagn_send_advance_bt_config(priv);
262 }
263
264 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
265 {
266         struct iwl_priv *priv =
267                 container_of(work, struct iwl_priv, bt_full_concurrency);
268         struct iwl_rxon_context *ctx;
269
270         mutex_lock(&priv->mutex);
271
272         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
273                 goto out;
274
275         /* dont send host command if rf-kill is on */
276         if (!iwl_is_ready_rf(priv))
277                 goto out;
278
279         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
280                        priv->bt_full_concurrent ?
281                        "full concurrency" : "3-wire");
282
283         /*
284          * LQ & RXON updated cmds must be sent before BT Config cmd
285          * to avoid 3-wire collisions
286          */
287         for_each_context(priv, ctx) {
288                 iwlagn_set_rxon_chain(priv, ctx);
289                 iwlagn_commit_rxon(priv, ctx);
290         }
291
292         iwlagn_send_advance_bt_config(priv);
293 out:
294         mutex_unlock(&priv->mutex);
295 }
296
297 /**
298  * iwl_bg_statistics_periodic - Timer callback to queue statistics
299  *
300  * This callback is provided in order to send a statistics request.
301  *
302  * This timer function is continually reset to execute within
303  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
304  * was received.  We need to ensure we receive the statistics in order
305  * to update the temperature used for calibrating the TXPOWER.
306  */
307 static void iwl_bg_statistics_periodic(unsigned long data)
308 {
309         struct iwl_priv *priv = (struct iwl_priv *)data;
310
311         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
312                 return;
313
314         /* dont send host command if rf-kill is on */
315         if (!iwl_is_ready_rf(priv))
316                 return;
317
318         iwl_send_statistics_request(priv, CMD_ASYNC, false);
319 }
320
321
322 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
323                                         u32 start_idx, u32 num_events,
324                                         u32 mode)
325 {
326         u32 i;
327         u32 ptr;        /* SRAM byte address of log data */
328         u32 ev, time, data; /* event log data */
329         unsigned long reg_flags;
330
331         if (mode == 0)
332                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
333         else
334                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
335
336         /* Make sure device is powered up for SRAM reads */
337         spin_lock_irqsave(&priv->reg_lock, reg_flags);
338         if (iwl_grab_nic_access(priv)) {
339                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
340                 return;
341         }
342
343         /* Set starting address; reads will auto-increment */
344         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
345         rmb();
346
347         /*
348          * "time" is actually "data" for mode 0 (no timestamp).
349          * place event id # at far right for easier visual parsing.
350          */
351         for (i = 0; i < num_events; i++) {
352                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
353                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
354                 if (mode == 0) {
355                         trace_iwlwifi_dev_ucode_cont_event(priv,
356                                                         0, time, ev);
357                 } else {
358                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
359                         trace_iwlwifi_dev_ucode_cont_event(priv,
360                                                 time, data, ev);
361                 }
362         }
363         /* Allow device to power down */
364         iwl_release_nic_access(priv);
365         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
366 }
367
368 static void iwl_continuous_event_trace(struct iwl_priv *priv)
369 {
370         u32 capacity;   /* event log capacity in # entries */
371         u32 base;       /* SRAM byte address of event log header */
372         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
373         u32 num_wraps;  /* # times uCode wrapped to top of log */
374         u32 next_entry; /* index of next entry to be written by uCode */
375
376         base = priv->device_pointers.error_event_table;
377         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
378                 capacity = iwl_read_targ_mem(priv, base);
379                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
380                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
381                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
382         } else
383                 return;
384
385         if (num_wraps == priv->event_log.num_wraps) {
386                 iwl_print_cont_event_trace(priv,
387                                        base, priv->event_log.next_entry,
388                                        next_entry - priv->event_log.next_entry,
389                                        mode);
390                 priv->event_log.non_wraps_count++;
391         } else {
392                 if ((num_wraps - priv->event_log.num_wraps) > 1)
393                         priv->event_log.wraps_more_count++;
394                 else
395                         priv->event_log.wraps_once_count++;
396                 trace_iwlwifi_dev_ucode_wrap_event(priv,
397                                 num_wraps - priv->event_log.num_wraps,
398                                 next_entry, priv->event_log.next_entry);
399                 if (next_entry < priv->event_log.next_entry) {
400                         iwl_print_cont_event_trace(priv, base,
401                                priv->event_log.next_entry,
402                                capacity - priv->event_log.next_entry,
403                                mode);
404
405                         iwl_print_cont_event_trace(priv, base, 0,
406                                 next_entry, mode);
407                 } else {
408                         iwl_print_cont_event_trace(priv, base,
409                                next_entry, capacity - next_entry,
410                                mode);
411
412                         iwl_print_cont_event_trace(priv, base, 0,
413                                 next_entry, mode);
414                 }
415         }
416         priv->event_log.num_wraps = num_wraps;
417         priv->event_log.next_entry = next_entry;
418 }
419
420 /**
421  * iwl_bg_ucode_trace - Timer callback to log ucode event
422  *
423  * The timer is continually set to execute every
424  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
425  * this function is to perform continuous uCode event logging operation
426  * if enabled
427  */
428 static void iwl_bg_ucode_trace(unsigned long data)
429 {
430         struct iwl_priv *priv = (struct iwl_priv *)data;
431
432         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
433                 return;
434
435         if (priv->event_log.ucode_trace) {
436                 iwl_continuous_event_trace(priv);
437                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
438                 mod_timer(&priv->ucode_trace,
439                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
440         }
441 }
442
443 static void iwl_bg_tx_flush(struct work_struct *work)
444 {
445         struct iwl_priv *priv =
446                 container_of(work, struct iwl_priv, tx_flush);
447
448         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
449                 return;
450
451         /* do nothing if rf-kill is on */
452         if (!iwl_is_ready_rf(priv))
453                 return;
454
455         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
456         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
457 }
458
459 /**
460  * iwl_rx_handle - Main entry function for receiving responses from uCode
461  *
462  * Uses the priv->rx_handlers callback function array to invoke
463  * the appropriate handlers, including command responses,
464  * frame-received notifications, and other notifications.
465  */
466 static void iwl_rx_handle(struct iwl_priv *priv)
467 {
468         struct iwl_rx_mem_buffer *rxb;
469         struct iwl_rx_packet *pkt;
470         struct iwl_rx_queue *rxq = &priv->rxq;
471         u32 r, i;
472         int reclaim;
473         unsigned long flags;
474         u8 fill_rx = 0;
475         u32 count = 8;
476         int total_empty;
477
478         /* uCode's read index (stored in shared DRAM) indicates the last Rx
479          * buffer that the driver may process (last buffer filled by ucode). */
480         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
481         i = rxq->read;
482
483         /* Rx interrupt, but nothing sent from uCode */
484         if (i == r)
485                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
486
487         /* calculate total frames need to be restock after handling RX */
488         total_empty = r - rxq->write_actual;
489         if (total_empty < 0)
490                 total_empty += RX_QUEUE_SIZE;
491
492         if (total_empty > (RX_QUEUE_SIZE / 2))
493                 fill_rx = 1;
494
495         while (i != r) {
496                 int len;
497
498                 rxb = rxq->queue[i];
499
500                 /* If an RXB doesn't have a Rx queue slot associated with it,
501                  * then a bug has been introduced in the queue refilling
502                  * routines -- catch it here */
503                 if (WARN_ON(rxb == NULL)) {
504                         i = (i + 1) & RX_QUEUE_MASK;
505                         continue;
506                 }
507
508                 rxq->queue[i] = NULL;
509
510                 dma_unmap_page(priv->bus.dev, rxb->page_dma,
511                                PAGE_SIZE << priv->hw_params.rx_page_order,
512                                DMA_FROM_DEVICE);
513                 pkt = rxb_addr(rxb);
514
515                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
516                 len += sizeof(u32); /* account for status word */
517                 trace_iwlwifi_dev_rx(priv, pkt, len);
518
519                 /* Reclaim a command buffer only if this packet is a response
520                  *   to a (driver-originated) command.
521                  * If the packet (e.g. Rx frame) originated from uCode,
522                  *   there is no command buffer to reclaim.
523                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
524                  *   but apparently a few don't get set; catch them here. */
525                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
526                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
527                         (pkt->hdr.cmd != REPLY_RX) &&
528                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
529                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
530                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
531                         (pkt->hdr.cmd != REPLY_TX);
532
533                 /*
534                  * Do the notification wait before RX handlers so
535                  * even if the RX handler consumes the RXB we have
536                  * access to it in the notification wait entry.
537                  */
538                 if (!list_empty(&priv->_agn.notif_waits)) {
539                         struct iwl_notification_wait *w;
540
541                         spin_lock(&priv->_agn.notif_wait_lock);
542                         list_for_each_entry(w, &priv->_agn.notif_waits, list) {
543                                 if (w->cmd == pkt->hdr.cmd) {
544                                         w->triggered = true;
545                                         if (w->fn)
546                                                 w->fn(priv, pkt, w->fn_data);
547                                 }
548                         }
549                         spin_unlock(&priv->_agn.notif_wait_lock);
550
551                         wake_up_all(&priv->_agn.notif_waitq);
552                 }
553                 if (priv->pre_rx_handler)
554                         priv->pre_rx_handler(priv, rxb);
555
556                 /* Based on type of command response or notification,
557                  *   handle those that need handling via function in
558                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
559                 if (priv->rx_handlers[pkt->hdr.cmd]) {
560                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
561                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
562                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
563                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
564                 } else {
565                         /* No handling needed */
566                         IWL_DEBUG_RX(priv,
567                                 "r %d i %d No handler needed for %s, 0x%02x\n",
568                                 r, i, get_cmd_string(pkt->hdr.cmd),
569                                 pkt->hdr.cmd);
570                 }
571
572                 /*
573                  * XXX: After here, we should always check rxb->page
574                  * against NULL before touching it or its virtual
575                  * memory (pkt). Because some rx_handler might have
576                  * already taken or freed the pages.
577                  */
578
579                 if (reclaim) {
580                         /* Invoke any callbacks, transfer the buffer to caller,
581                          * and fire off the (possibly) blocking iwl_send_cmd()
582                          * as we reclaim the driver command queue */
583                         if (rxb->page)
584                                 iwl_tx_cmd_complete(priv, rxb);
585                         else
586                                 IWL_WARN(priv, "Claim null rxb?\n");
587                 }
588
589                 /* Reuse the page if possible. For notification packets and
590                  * SKBs that fail to Rx correctly, add them back into the
591                  * rx_free list for reuse later. */
592                 spin_lock_irqsave(&rxq->lock, flags);
593                 if (rxb->page != NULL) {
594                         rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
595                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
596                                 DMA_FROM_DEVICE);
597                         list_add_tail(&rxb->list, &rxq->rx_free);
598                         rxq->free_count++;
599                 } else
600                         list_add_tail(&rxb->list, &rxq->rx_used);
601
602                 spin_unlock_irqrestore(&rxq->lock, flags);
603
604                 i = (i + 1) & RX_QUEUE_MASK;
605                 /* If there are a lot of unused frames,
606                  * restock the Rx queue so ucode wont assert. */
607                 if (fill_rx) {
608                         count++;
609                         if (count >= 8) {
610                                 rxq->read = i;
611                                 iwlagn_rx_replenish_now(priv);
612                                 count = 0;
613                         }
614                 }
615         }
616
617         /* Backtrack one entry */
618         rxq->read = i;
619         if (fill_rx)
620                 iwlagn_rx_replenish_now(priv);
621         else
622                 iwlagn_rx_queue_restock(priv);
623 }
624
625 /* tasklet for iwlagn interrupt */
626 static void iwl_irq_tasklet(struct iwl_priv *priv)
627 {
628         u32 inta = 0;
629         u32 handled = 0;
630         unsigned long flags;
631         u32 i;
632 #ifdef CONFIG_IWLWIFI_DEBUG
633         u32 inta_mask;
634 #endif
635
636         spin_lock_irqsave(&priv->lock, flags);
637
638         /* Ack/clear/reset pending uCode interrupts.
639          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
640          */
641         /* There is a hardware bug in the interrupt mask function that some
642          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
643          * they are disabled in the CSR_INT_MASK register. Furthermore the
644          * ICT interrupt handling mechanism has another bug that might cause
645          * these unmasked interrupts fail to be detected. We workaround the
646          * hardware bugs here by ACKing all the possible interrupts so that
647          * interrupt coalescing can still be achieved.
648          */
649         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
650
651         inta = priv->_agn.inta;
652
653 #ifdef CONFIG_IWLWIFI_DEBUG
654         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
655                 /* just for debug */
656                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
657                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
658                                 inta, inta_mask);
659         }
660 #endif
661
662         spin_unlock_irqrestore(&priv->lock, flags);
663
664         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
665         priv->_agn.inta = 0;
666
667         /* Now service all interrupt bits discovered above. */
668         if (inta & CSR_INT_BIT_HW_ERR) {
669                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
670
671                 /* Tell the device to stop sending interrupts */
672                 iwl_disable_interrupts(priv);
673
674                 priv->isr_stats.hw++;
675                 iwl_irq_handle_error(priv);
676
677                 handled |= CSR_INT_BIT_HW_ERR;
678
679                 return;
680         }
681
682 #ifdef CONFIG_IWLWIFI_DEBUG
683         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
684                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
685                 if (inta & CSR_INT_BIT_SCD) {
686                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
687                                       "the frame/frames.\n");
688                         priv->isr_stats.sch++;
689                 }
690
691                 /* Alive notification via Rx interrupt will do the real work */
692                 if (inta & CSR_INT_BIT_ALIVE) {
693                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
694                         priv->isr_stats.alive++;
695                 }
696         }
697 #endif
698         /* Safely ignore these bits for debug checks below */
699         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
700
701         /* HW RF KILL switch toggled */
702         if (inta & CSR_INT_BIT_RF_KILL) {
703                 int hw_rf_kill = 0;
704                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
705                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
706                         hw_rf_kill = 1;
707
708                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
709                                 hw_rf_kill ? "disable radio" : "enable radio");
710
711                 priv->isr_stats.rfkill++;
712
713                 /* driver only loads ucode once setting the interface up.
714                  * the driver allows loading the ucode even if the radio
715                  * is killed. Hence update the killswitch state here. The
716                  * rfkill handler will care about restarting if needed.
717                  */
718                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
719                         if (hw_rf_kill)
720                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
721                         else
722                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
723                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
724                 }
725
726                 handled |= CSR_INT_BIT_RF_KILL;
727         }
728
729         /* Chip got too hot and stopped itself */
730         if (inta & CSR_INT_BIT_CT_KILL) {
731                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
732                 priv->isr_stats.ctkill++;
733                 handled |= CSR_INT_BIT_CT_KILL;
734         }
735
736         /* Error detected by uCode */
737         if (inta & CSR_INT_BIT_SW_ERR) {
738                 IWL_ERR(priv, "Microcode SW error detected. "
739                         " Restarting 0x%X.\n", inta);
740                 priv->isr_stats.sw++;
741                 iwl_irq_handle_error(priv);
742                 handled |= CSR_INT_BIT_SW_ERR;
743         }
744
745         /* uCode wakes up after power-down sleep */
746         if (inta & CSR_INT_BIT_WAKEUP) {
747                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
748                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
749                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
750                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
751
752                 priv->isr_stats.wakeup++;
753
754                 handled |= CSR_INT_BIT_WAKEUP;
755         }
756
757         /* All uCode command responses, including Tx command responses,
758          * Rx "responses" (frame-received notification), and other
759          * notifications from uCode come through here*/
760         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
761                         CSR_INT_BIT_RX_PERIODIC)) {
762                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
763                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
764                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
765                         iwl_write32(priv, CSR_FH_INT_STATUS,
766                                         CSR_FH_INT_RX_MASK);
767                 }
768                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
769                         handled |= CSR_INT_BIT_RX_PERIODIC;
770                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
771                 }
772                 /* Sending RX interrupt require many steps to be done in the
773                  * the device:
774                  * 1- write interrupt to current index in ICT table.
775                  * 2- dma RX frame.
776                  * 3- update RX shared data to indicate last write index.
777                  * 4- send interrupt.
778                  * This could lead to RX race, driver could receive RX interrupt
779                  * but the shared data changes does not reflect this;
780                  * periodic interrupt will detect any dangling Rx activity.
781                  */
782
783                 /* Disable periodic interrupt; we use it as just a one-shot. */
784                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
785                             CSR_INT_PERIODIC_DIS);
786                 iwl_rx_handle(priv);
787
788                 /*
789                  * Enable periodic interrupt in 8 msec only if we received
790                  * real RX interrupt (instead of just periodic int), to catch
791                  * any dangling Rx interrupt.  If it was just the periodic
792                  * interrupt, there was no dangling Rx activity, and no need
793                  * to extend the periodic interrupt; one-shot is enough.
794                  */
795                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
796                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
797                                     CSR_INT_PERIODIC_ENA);
798
799                 priv->isr_stats.rx++;
800         }
801
802         /* This "Tx" DMA channel is used only for loading uCode */
803         if (inta & CSR_INT_BIT_FH_TX) {
804                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
805                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
806                 priv->isr_stats.tx++;
807                 handled |= CSR_INT_BIT_FH_TX;
808                 /* Wake up uCode load routine, now that load is complete */
809                 priv->ucode_write_complete = 1;
810                 wake_up_interruptible(&priv->wait_command_queue);
811         }
812
813         if (inta & ~handled) {
814                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
815                 priv->isr_stats.unhandled++;
816         }
817
818         if (inta & ~(priv->inta_mask)) {
819                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
820                          inta & ~priv->inta_mask);
821         }
822
823         /* Re-enable all interrupts */
824         /* only Re-enable if disabled by irq */
825         if (test_bit(STATUS_INT_ENABLED, &priv->status))
826                 iwl_enable_interrupts(priv);
827         /* Re-enable RF_KILL if it occurred */
828         else if (handled & CSR_INT_BIT_RF_KILL)
829                 iwl_enable_rfkill_int(priv);
830 }
831
832 /*****************************************************************************
833  *
834  * sysfs attributes
835  *
836  *****************************************************************************/
837
838 #ifdef CONFIG_IWLWIFI_DEBUG
839
840 /*
841  * The following adds a new attribute to the sysfs representation
842  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
843  * used for controlling the debug level.
844  *
845  * See the level definitions in iwl for details.
846  *
847  * The debug_level being managed using sysfs below is a per device debug
848  * level that is used instead of the global debug level if it (the per
849  * device debug level) is set.
850  */
851 static ssize_t show_debug_level(struct device *d,
852                                 struct device_attribute *attr, char *buf)
853 {
854         struct iwl_priv *priv = dev_get_drvdata(d);
855         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
856 }
857 static ssize_t store_debug_level(struct device *d,
858                                 struct device_attribute *attr,
859                                  const char *buf, size_t count)
860 {
861         struct iwl_priv *priv = dev_get_drvdata(d);
862         unsigned long val;
863         int ret;
864
865         ret = strict_strtoul(buf, 0, &val);
866         if (ret)
867                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
868         else {
869                 priv->debug_level = val;
870                 if (iwl_alloc_traffic_mem(priv))
871                         IWL_ERR(priv,
872                                 "Not enough memory to generate traffic log\n");
873         }
874         return strnlen(buf, count);
875 }
876
877 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
878                         show_debug_level, store_debug_level);
879
880
881 #endif /* CONFIG_IWLWIFI_DEBUG */
882
883
884 static ssize_t show_temperature(struct device *d,
885                                 struct device_attribute *attr, char *buf)
886 {
887         struct iwl_priv *priv = dev_get_drvdata(d);
888
889         if (!iwl_is_alive(priv))
890                 return -EAGAIN;
891
892         return sprintf(buf, "%d\n", priv->temperature);
893 }
894
895 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
896
897 static ssize_t show_tx_power(struct device *d,
898                              struct device_attribute *attr, char *buf)
899 {
900         struct iwl_priv *priv = dev_get_drvdata(d);
901
902         if (!iwl_is_ready_rf(priv))
903                 return sprintf(buf, "off\n");
904         else
905                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
906 }
907
908 static ssize_t store_tx_power(struct device *d,
909                               struct device_attribute *attr,
910                               const char *buf, size_t count)
911 {
912         struct iwl_priv *priv = dev_get_drvdata(d);
913         unsigned long val;
914         int ret;
915
916         ret = strict_strtoul(buf, 10, &val);
917         if (ret)
918                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
919         else {
920                 ret = iwl_set_tx_power(priv, val, false);
921                 if (ret)
922                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
923                                 ret);
924                 else
925                         ret = count;
926         }
927         return ret;
928 }
929
930 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
931
932 static struct attribute *iwl_sysfs_entries[] = {
933         &dev_attr_temperature.attr,
934         &dev_attr_tx_power.attr,
935 #ifdef CONFIG_IWLWIFI_DEBUG
936         &dev_attr_debug_level.attr,
937 #endif
938         NULL
939 };
940
941 static struct attribute_group iwl_attribute_group = {
942         .name = NULL,           /* put in device directory */
943         .attrs = iwl_sysfs_entries,
944 };
945
946 /******************************************************************************
947  *
948  * uCode download functions
949  *
950  ******************************************************************************/
951
952 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
953 {
954         if (desc->v_addr)
955                 dma_free_coherent(priv->bus.dev, desc->len,
956                                   desc->v_addr, desc->p_addr);
957         desc->v_addr = NULL;
958         desc->len = 0;
959 }
960
961 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
962 {
963         iwl_free_fw_desc(priv, &img->code);
964         iwl_free_fw_desc(priv, &img->data);
965 }
966
967 static void iwl_dealloc_ucode(struct iwl_priv *priv)
968 {
969         iwl_free_fw_img(priv, &priv->ucode_rt);
970         iwl_free_fw_img(priv, &priv->ucode_init);
971 }
972
973 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
974                              const void *data, size_t len)
975 {
976         if (!len) {
977                 desc->v_addr = NULL;
978                 return -EINVAL;
979         }
980
981         desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
982                                           &desc->p_addr, GFP_KERNEL);
983         if (!desc->v_addr)
984                 return -ENOMEM;
985
986         desc->len = len;
987         memcpy(desc->v_addr, data, len);
988         return 0;
989 }
990
991 struct iwlagn_ucode_capabilities {
992         u32 max_probe_length;
993         u32 standard_phy_calibration_size;
994         u32 flags;
995 };
996
997 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
998 static int iwl_mac_setup_register(struct iwl_priv *priv,
999                                   struct iwlagn_ucode_capabilities *capa);
1000
1001 #define UCODE_EXPERIMENTAL_INDEX        100
1002 #define UCODE_EXPERIMENTAL_TAG          "exp"
1003
1004 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1005 {
1006         const char *name_pre = priv->cfg->fw_name_pre;
1007         char tag[8];
1008
1009         if (first) {
1010 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1011                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1012                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1013         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1014 #endif
1015                 priv->fw_index = priv->cfg->ucode_api_max;
1016                 sprintf(tag, "%d", priv->fw_index);
1017         } else {
1018                 priv->fw_index--;
1019                 sprintf(tag, "%d", priv->fw_index);
1020         }
1021
1022         if (priv->fw_index < priv->cfg->ucode_api_min) {
1023                 IWL_ERR(priv, "no suitable firmware found!\n");
1024                 return -ENOENT;
1025         }
1026
1027         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1028
1029         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1030                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1031                                 ? "EXPERIMENTAL " : "",
1032                        priv->firmware_name);
1033
1034         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1035                                        priv->bus.dev,
1036                                        GFP_KERNEL, priv, iwl_ucode_callback);
1037 }
1038
1039 struct iwlagn_firmware_pieces {
1040         const void *inst, *data, *init, *init_data;
1041         size_t inst_size, data_size, init_size, init_data_size;
1042
1043         u32 build;
1044
1045         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1046         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1047 };
1048
1049 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1050                                        const struct firmware *ucode_raw,
1051                                        struct iwlagn_firmware_pieces *pieces)
1052 {
1053         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1054         u32 api_ver, hdr_size;
1055         const u8 *src;
1056
1057         priv->ucode_ver = le32_to_cpu(ucode->ver);
1058         api_ver = IWL_UCODE_API(priv->ucode_ver);
1059
1060         switch (api_ver) {
1061         default:
1062                 hdr_size = 28;
1063                 if (ucode_raw->size < hdr_size) {
1064                         IWL_ERR(priv, "File size too small!\n");
1065                         return -EINVAL;
1066                 }
1067                 pieces->build = le32_to_cpu(ucode->u.v2.build);
1068                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1069                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1070                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1071                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1072                 src = ucode->u.v2.data;
1073                 break;
1074         case 0:
1075         case 1:
1076         case 2:
1077                 hdr_size = 24;
1078                 if (ucode_raw->size < hdr_size) {
1079                         IWL_ERR(priv, "File size too small!\n");
1080                         return -EINVAL;
1081                 }
1082                 pieces->build = 0;
1083                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1084                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1085                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1086                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1087                 src = ucode->u.v1.data;
1088                 break;
1089         }
1090
1091         /* Verify size of file vs. image size info in file's header */
1092         if (ucode_raw->size != hdr_size + pieces->inst_size +
1093                                 pieces->data_size + pieces->init_size +
1094                                 pieces->init_data_size) {
1095
1096                 IWL_ERR(priv,
1097                         "uCode file size %d does not match expected size\n",
1098                         (int)ucode_raw->size);
1099                 return -EINVAL;
1100         }
1101
1102         pieces->inst = src;
1103         src += pieces->inst_size;
1104         pieces->data = src;
1105         src += pieces->data_size;
1106         pieces->init = src;
1107         src += pieces->init_size;
1108         pieces->init_data = src;
1109         src += pieces->init_data_size;
1110
1111         return 0;
1112 }
1113
1114 static int iwlagn_wanted_ucode_alternative = 1;
1115
1116 static int iwlagn_load_firmware(struct iwl_priv *priv,
1117                                 const struct firmware *ucode_raw,
1118                                 struct iwlagn_firmware_pieces *pieces,
1119                                 struct iwlagn_ucode_capabilities *capa)
1120 {
1121         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1122         struct iwl_ucode_tlv *tlv;
1123         size_t len = ucode_raw->size;
1124         const u8 *data;
1125         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1126         u64 alternatives;
1127         u32 tlv_len;
1128         enum iwl_ucode_tlv_type tlv_type;
1129         const u8 *tlv_data;
1130
1131         if (len < sizeof(*ucode)) {
1132                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1133                 return -EINVAL;
1134         }
1135
1136         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1137                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1138                         le32_to_cpu(ucode->magic));
1139                 return -EINVAL;
1140         }
1141
1142         /*
1143          * Check which alternatives are present, and "downgrade"
1144          * when the chosen alternative is not present, warning
1145          * the user when that happens. Some files may not have
1146          * any alternatives, so don't warn in that case.
1147          */
1148         alternatives = le64_to_cpu(ucode->alternatives);
1149         tmp = wanted_alternative;
1150         if (wanted_alternative > 63)
1151                 wanted_alternative = 63;
1152         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1153                 wanted_alternative--;
1154         if (wanted_alternative && wanted_alternative != tmp)
1155                 IWL_WARN(priv,
1156                          "uCode alternative %d not available, choosing %d\n",
1157                          tmp, wanted_alternative);
1158
1159         priv->ucode_ver = le32_to_cpu(ucode->ver);
1160         pieces->build = le32_to_cpu(ucode->build);
1161         data = ucode->data;
1162
1163         len -= sizeof(*ucode);
1164
1165         while (len >= sizeof(*tlv)) {
1166                 u16 tlv_alt;
1167
1168                 len -= sizeof(*tlv);
1169                 tlv = (void *)data;
1170
1171                 tlv_len = le32_to_cpu(tlv->length);
1172                 tlv_type = le16_to_cpu(tlv->type);
1173                 tlv_alt = le16_to_cpu(tlv->alternative);
1174                 tlv_data = tlv->data;
1175
1176                 if (len < tlv_len) {
1177                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1178                                 len, tlv_len);
1179                         return -EINVAL;
1180                 }
1181                 len -= ALIGN(tlv_len, 4);
1182                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1183
1184                 /*
1185                  * Alternative 0 is always valid.
1186                  *
1187                  * Skip alternative TLVs that are not selected.
1188                  */
1189                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1190                         continue;
1191
1192                 switch (tlv_type) {
1193                 case IWL_UCODE_TLV_INST:
1194                         pieces->inst = tlv_data;
1195                         pieces->inst_size = tlv_len;
1196                         break;
1197                 case IWL_UCODE_TLV_DATA:
1198                         pieces->data = tlv_data;
1199                         pieces->data_size = tlv_len;
1200                         break;
1201                 case IWL_UCODE_TLV_INIT:
1202                         pieces->init = tlv_data;
1203                         pieces->init_size = tlv_len;
1204                         break;
1205                 case IWL_UCODE_TLV_INIT_DATA:
1206                         pieces->init_data = tlv_data;
1207                         pieces->init_data_size = tlv_len;
1208                         break;
1209                 case IWL_UCODE_TLV_BOOT:
1210                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1211                         break;
1212                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1213                         if (tlv_len != sizeof(u32))
1214                                 goto invalid_tlv_len;
1215                         capa->max_probe_length =
1216                                         le32_to_cpup((__le32 *)tlv_data);
1217                         break;
1218                 case IWL_UCODE_TLV_PAN:
1219                         if (tlv_len)
1220                                 goto invalid_tlv_len;
1221                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1222                         break;
1223                 case IWL_UCODE_TLV_FLAGS:
1224                         /* must be at least one u32 */
1225                         if (tlv_len < sizeof(u32))
1226                                 goto invalid_tlv_len;
1227                         /* and a proper number of u32s */
1228                         if (tlv_len % sizeof(u32))
1229                                 goto invalid_tlv_len;
1230                         /*
1231                          * This driver only reads the first u32 as
1232                          * right now no more features are defined,
1233                          * if that changes then either the driver
1234                          * will not work with the new firmware, or
1235                          * it'll not take advantage of new features.
1236                          */
1237                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
1238                         break;
1239                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1240                         if (tlv_len != sizeof(u32))
1241                                 goto invalid_tlv_len;
1242                         pieces->init_evtlog_ptr =
1243                                         le32_to_cpup((__le32 *)tlv_data);
1244                         break;
1245                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1246                         if (tlv_len != sizeof(u32))
1247                                 goto invalid_tlv_len;
1248                         pieces->init_evtlog_size =
1249                                         le32_to_cpup((__le32 *)tlv_data);
1250                         break;
1251                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1252                         if (tlv_len != sizeof(u32))
1253                                 goto invalid_tlv_len;
1254                         pieces->init_errlog_ptr =
1255                                         le32_to_cpup((__le32 *)tlv_data);
1256                         break;
1257                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1258                         if (tlv_len != sizeof(u32))
1259                                 goto invalid_tlv_len;
1260                         pieces->inst_evtlog_ptr =
1261                                         le32_to_cpup((__le32 *)tlv_data);
1262                         break;
1263                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1264                         if (tlv_len != sizeof(u32))
1265                                 goto invalid_tlv_len;
1266                         pieces->inst_evtlog_size =
1267                                         le32_to_cpup((__le32 *)tlv_data);
1268                         break;
1269                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1270                         if (tlv_len != sizeof(u32))
1271                                 goto invalid_tlv_len;
1272                         pieces->inst_errlog_ptr =
1273                                         le32_to_cpup((__le32 *)tlv_data);
1274                         break;
1275                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1276                         if (tlv_len)
1277                                 goto invalid_tlv_len;
1278                         priv->enhance_sensitivity_table = true;
1279                         break;
1280                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1281                         if (tlv_len != sizeof(u32))
1282                                 goto invalid_tlv_len;
1283                         capa->standard_phy_calibration_size =
1284                                         le32_to_cpup((__le32 *)tlv_data);
1285                         break;
1286                 default:
1287                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1288                         break;
1289                 }
1290         }
1291
1292         if (len) {
1293                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1294                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1295                 return -EINVAL;
1296         }
1297
1298         return 0;
1299
1300  invalid_tlv_len:
1301         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1302         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1303
1304         return -EINVAL;
1305 }
1306
1307 /**
1308  * iwl_ucode_callback - callback when firmware was loaded
1309  *
1310  * If loaded successfully, copies the firmware into buffers
1311  * for the card to fetch (via DMA).
1312  */
1313 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1314 {
1315         struct iwl_priv *priv = context;
1316         struct iwl_ucode_header *ucode;
1317         int err;
1318         struct iwlagn_firmware_pieces pieces;
1319         const unsigned int api_max = priv->cfg->ucode_api_max;
1320         const unsigned int api_min = priv->cfg->ucode_api_min;
1321         u32 api_ver;
1322         char buildstr[25];
1323         u32 build;
1324         struct iwlagn_ucode_capabilities ucode_capa = {
1325                 .max_probe_length = 200,
1326                 .standard_phy_calibration_size =
1327                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1328         };
1329
1330         memset(&pieces, 0, sizeof(pieces));
1331
1332         if (!ucode_raw) {
1333                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1334                         IWL_ERR(priv,
1335                                 "request for firmware file '%s' failed.\n",
1336                                 priv->firmware_name);
1337                 goto try_again;
1338         }
1339
1340         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1341                        priv->firmware_name, ucode_raw->size);
1342
1343         /* Make sure that we got at least the API version number */
1344         if (ucode_raw->size < 4) {
1345                 IWL_ERR(priv, "File size way too small!\n");
1346                 goto try_again;
1347         }
1348
1349         /* Data from ucode file:  header followed by uCode images */
1350         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1351
1352         if (ucode->ver)
1353                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1354         else
1355                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1356                                            &ucode_capa);
1357
1358         if (err)
1359                 goto try_again;
1360
1361         api_ver = IWL_UCODE_API(priv->ucode_ver);
1362         build = pieces.build;
1363
1364         /*
1365          * api_ver should match the api version forming part of the
1366          * firmware filename ... but we don't check for that and only rely
1367          * on the API version read from firmware header from here on forward
1368          */
1369         /* no api version check required for experimental uCode */
1370         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1371                 if (api_ver < api_min || api_ver > api_max) {
1372                         IWL_ERR(priv,
1373                                 "Driver unable to support your firmware API. "
1374                                 "Driver supports v%u, firmware is v%u.\n",
1375                                 api_max, api_ver);
1376                         goto try_again;
1377                 }
1378
1379                 if (api_ver != api_max)
1380                         IWL_ERR(priv,
1381                                 "Firmware has old API version. Expected v%u, "
1382                                 "got v%u. New firmware can be obtained "
1383                                 "from http://www.intellinuxwireless.org.\n",
1384                                 api_max, api_ver);
1385         }
1386
1387         if (build)
1388                 sprintf(buildstr, " build %u%s", build,
1389                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1390                                 ? " (EXP)" : "");
1391         else
1392                 buildstr[0] = '\0';
1393
1394         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1395                  IWL_UCODE_MAJOR(priv->ucode_ver),
1396                  IWL_UCODE_MINOR(priv->ucode_ver),
1397                  IWL_UCODE_API(priv->ucode_ver),
1398                  IWL_UCODE_SERIAL(priv->ucode_ver),
1399                  buildstr);
1400
1401         snprintf(priv->hw->wiphy->fw_version,
1402                  sizeof(priv->hw->wiphy->fw_version),
1403                  "%u.%u.%u.%u%s",
1404                  IWL_UCODE_MAJOR(priv->ucode_ver),
1405                  IWL_UCODE_MINOR(priv->ucode_ver),
1406                  IWL_UCODE_API(priv->ucode_ver),
1407                  IWL_UCODE_SERIAL(priv->ucode_ver),
1408                  buildstr);
1409
1410         /*
1411          * For any of the failures below (before allocating pci memory)
1412          * we will try to load a version with a smaller API -- maybe the
1413          * user just got a corrupted version of the latest API.
1414          */
1415
1416         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1417                        priv->ucode_ver);
1418         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1419                        pieces.inst_size);
1420         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1421                        pieces.data_size);
1422         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1423                        pieces.init_size);
1424         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1425                        pieces.init_data_size);
1426
1427         /* Verify that uCode images will fit in card's SRAM */
1428         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1429                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1430                         pieces.inst_size);
1431                 goto try_again;
1432         }
1433
1434         if (pieces.data_size > priv->hw_params.max_data_size) {
1435                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1436                         pieces.data_size);
1437                 goto try_again;
1438         }
1439
1440         if (pieces.init_size > priv->hw_params.max_inst_size) {
1441                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1442                         pieces.init_size);
1443                 goto try_again;
1444         }
1445
1446         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1447                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1448                         pieces.init_data_size);
1449                 goto try_again;
1450         }
1451
1452         /* Allocate ucode buffers for card's bus-master loading ... */
1453
1454         /* Runtime instructions and 2 copies of data:
1455          * 1) unmodified from disk
1456          * 2) backup cache for save/restore during power-downs */
1457         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1458                               pieces.inst, pieces.inst_size))
1459                 goto err_pci_alloc;
1460         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1461                               pieces.data, pieces.data_size))
1462                 goto err_pci_alloc;
1463
1464         /* Initialization instructions and data */
1465         if (pieces.init_size && pieces.init_data_size) {
1466                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1467                                       pieces.init, pieces.init_size))
1468                         goto err_pci_alloc;
1469                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1470                                       pieces.init_data, pieces.init_data_size))
1471                         goto err_pci_alloc;
1472         }
1473
1474         /* Now that we can no longer fail, copy information */
1475
1476         /*
1477          * The (size - 16) / 12 formula is based on the information recorded
1478          * for each event, which is of mode 1 (including timestamp) for all
1479          * new microcodes that include this information.
1480          */
1481         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1482         if (pieces.init_evtlog_size)
1483                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1484         else
1485                 priv->_agn.init_evtlog_size =
1486                         priv->cfg->base_params->max_event_log_size;
1487         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1488         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1489         if (pieces.inst_evtlog_size)
1490                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1491         else
1492                 priv->_agn.inst_evtlog_size =
1493                         priv->cfg->base_params->max_event_log_size;
1494         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1495
1496         priv->new_scan_threshold_behaviour =
1497                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1498
1499         if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1500             (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1501                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1502                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1503         } else
1504                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1505
1506         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1507                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1508         else
1509                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1510
1511         /*
1512          * figure out the offset of chain noise reset and gain commands
1513          * base on the size of standard phy calibration commands table size
1514          */
1515         if (ucode_capa.standard_phy_calibration_size >
1516             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1517                 ucode_capa.standard_phy_calibration_size =
1518                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1519
1520         priv->_agn.phy_calib_chain_noise_reset_cmd =
1521                 ucode_capa.standard_phy_calibration_size;
1522         priv->_agn.phy_calib_chain_noise_gain_cmd =
1523                 ucode_capa.standard_phy_calibration_size + 1;
1524
1525         /**************************************************
1526          * This is still part of probe() in a sense...
1527          *
1528          * 9. Setup and register with mac80211 and debugfs
1529          **************************************************/
1530         err = iwl_mac_setup_register(priv, &ucode_capa);
1531         if (err)
1532                 goto out_unbind;
1533
1534         err = iwl_dbgfs_register(priv, DRV_NAME);
1535         if (err)
1536                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1537
1538         err = sysfs_create_group(&(priv->bus.dev->kobj),
1539                                         &iwl_attribute_group);
1540         if (err) {
1541                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1542                 goto out_unbind;
1543         }
1544
1545         /* We have our copies now, allow OS release its copies */
1546         release_firmware(ucode_raw);
1547         complete(&priv->_agn.firmware_loading_complete);
1548         return;
1549
1550  try_again:
1551         /* try next, if any */
1552         if (iwl_request_firmware(priv, false))
1553                 goto out_unbind;
1554         release_firmware(ucode_raw);
1555         return;
1556
1557  err_pci_alloc:
1558         IWL_ERR(priv, "failed to allocate pci memory\n");
1559         iwl_dealloc_ucode(priv);
1560  out_unbind:
1561         complete(&priv->_agn.firmware_loading_complete);
1562         device_release_driver(priv->bus.dev);
1563         release_firmware(ucode_raw);
1564 }
1565
1566 static const char *desc_lookup_text[] = {
1567         "OK",
1568         "FAIL",
1569         "BAD_PARAM",
1570         "BAD_CHECKSUM",
1571         "NMI_INTERRUPT_WDG",
1572         "SYSASSERT",
1573         "FATAL_ERROR",
1574         "BAD_COMMAND",
1575         "HW_ERROR_TUNE_LOCK",
1576         "HW_ERROR_TEMPERATURE",
1577         "ILLEGAL_CHAN_FREQ",
1578         "VCC_NOT_STABLE",
1579         "FH_ERROR",
1580         "NMI_INTERRUPT_HOST",
1581         "NMI_INTERRUPT_ACTION_PT",
1582         "NMI_INTERRUPT_UNKNOWN",
1583         "UCODE_VERSION_MISMATCH",
1584         "HW_ERROR_ABS_LOCK",
1585         "HW_ERROR_CAL_LOCK_FAIL",
1586         "NMI_INTERRUPT_INST_ACTION_PT",
1587         "NMI_INTERRUPT_DATA_ACTION_PT",
1588         "NMI_TRM_HW_ER",
1589         "NMI_INTERRUPT_TRM",
1590         "NMI_INTERRUPT_BREAK_POINT"
1591         "DEBUG_0",
1592         "DEBUG_1",
1593         "DEBUG_2",
1594         "DEBUG_3",
1595 };
1596
1597 static struct { char *name; u8 num; } advanced_lookup[] = {
1598         { "NMI_INTERRUPT_WDG", 0x34 },
1599         { "SYSASSERT", 0x35 },
1600         { "UCODE_VERSION_MISMATCH", 0x37 },
1601         { "BAD_COMMAND", 0x38 },
1602         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1603         { "FATAL_ERROR", 0x3D },
1604         { "NMI_TRM_HW_ERR", 0x46 },
1605         { "NMI_INTERRUPT_TRM", 0x4C },
1606         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1607         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1608         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1609         { "NMI_INTERRUPT_HOST", 0x66 },
1610         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1611         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1612         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1613         { "ADVANCED_SYSASSERT", 0 },
1614 };
1615
1616 static const char *desc_lookup(u32 num)
1617 {
1618         int i;
1619         int max = ARRAY_SIZE(desc_lookup_text);
1620
1621         if (num < max)
1622                 return desc_lookup_text[num];
1623
1624         max = ARRAY_SIZE(advanced_lookup) - 1;
1625         for (i = 0; i < max; i++) {
1626                 if (advanced_lookup[i].num == num)
1627                         break;
1628         }
1629         return advanced_lookup[i].name;
1630 }
1631
1632 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1633 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1634
1635 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1636 {
1637         u32 base;
1638         struct iwl_error_event_table table;
1639
1640         base = priv->device_pointers.error_event_table;
1641         if (priv->ucode_type == IWL_UCODE_INIT) {
1642                 if (!base)
1643                         base = priv->_agn.init_errlog_ptr;
1644         } else {
1645                 if (!base)
1646                         base = priv->_agn.inst_errlog_ptr;
1647         }
1648
1649         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1650                 IWL_ERR(priv,
1651                         "Not valid error log pointer 0x%08X for %s uCode\n",
1652                         base,
1653                         (priv->ucode_type == IWL_UCODE_INIT)
1654                                         ? "Init" : "RT");
1655                 return;
1656         }
1657
1658         iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1659
1660         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1661                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1662                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1663                         priv->status, table.valid);
1664         }
1665
1666         priv->isr_stats.err_code = table.error_id;
1667
1668         trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1669                                       table.data1, table.data2, table.line,
1670                                       table.blink1, table.blink2, table.ilink1,
1671                                       table.ilink2, table.bcon_time, table.gp1,
1672                                       table.gp2, table.gp3, table.ucode_ver,
1673                                       table.hw_ver, table.brd_ver);
1674         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1675                 desc_lookup(table.error_id));
1676         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1677         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1678         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1679         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1680         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1681         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1682         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1683         IWL_ERR(priv, "0x%08X | line\n", table.line);
1684         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1685         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1686         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1687         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1688         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1689         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1690         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1691         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1692         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1693         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1694 }
1695
1696 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1697
1698 /**
1699  * iwl_print_event_log - Dump error event log to syslog
1700  *
1701  */
1702 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1703                                u32 num_events, u32 mode,
1704                                int pos, char **buf, size_t bufsz)
1705 {
1706         u32 i;
1707         u32 base;       /* SRAM byte address of event log header */
1708         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1709         u32 ptr;        /* SRAM byte address of log data */
1710         u32 ev, time, data; /* event log data */
1711         unsigned long reg_flags;
1712
1713         if (num_events == 0)
1714                 return pos;
1715
1716         base = priv->device_pointers.log_event_table;
1717         if (priv->ucode_type == IWL_UCODE_INIT) {
1718                 if (!base)
1719                         base = priv->_agn.init_evtlog_ptr;
1720         } else {
1721                 if (!base)
1722                         base = priv->_agn.inst_evtlog_ptr;
1723         }
1724
1725         if (mode == 0)
1726                 event_size = 2 * sizeof(u32);
1727         else
1728                 event_size = 3 * sizeof(u32);
1729
1730         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1731
1732         /* Make sure device is powered up for SRAM reads */
1733         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1734         iwl_grab_nic_access(priv);
1735
1736         /* Set starting address; reads will auto-increment */
1737         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1738         rmb();
1739
1740         /* "time" is actually "data" for mode 0 (no timestamp).
1741         * place event id # at far right for easier visual parsing. */
1742         for (i = 0; i < num_events; i++) {
1743                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1744                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1745                 if (mode == 0) {
1746                         /* data, ev */
1747                         if (bufsz) {
1748                                 pos += scnprintf(*buf + pos, bufsz - pos,
1749                                                 "EVT_LOG:0x%08x:%04u\n",
1750                                                 time, ev);
1751                         } else {
1752                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1753                                         time, ev);
1754                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1755                                         time, ev);
1756                         }
1757                 } else {
1758                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1759                         if (bufsz) {
1760                                 pos += scnprintf(*buf + pos, bufsz - pos,
1761                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1762                                                  time, data, ev);
1763                         } else {
1764                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1765                                         time, data, ev);
1766                                 trace_iwlwifi_dev_ucode_event(priv, time,
1767                                         data, ev);
1768                         }
1769                 }
1770         }
1771
1772         /* Allow device to power down */
1773         iwl_release_nic_access(priv);
1774         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1775         return pos;
1776 }
1777
1778 /**
1779  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1780  */
1781 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1782                                     u32 num_wraps, u32 next_entry,
1783                                     u32 size, u32 mode,
1784                                     int pos, char **buf, size_t bufsz)
1785 {
1786         /*
1787          * display the newest DEFAULT_LOG_ENTRIES entries
1788          * i.e the entries just before the next ont that uCode would fill.
1789          */
1790         if (num_wraps) {
1791                 if (next_entry < size) {
1792                         pos = iwl_print_event_log(priv,
1793                                                 capacity - (size - next_entry),
1794                                                 size - next_entry, mode,
1795                                                 pos, buf, bufsz);
1796                         pos = iwl_print_event_log(priv, 0,
1797                                                   next_entry, mode,
1798                                                   pos, buf, bufsz);
1799                 } else
1800                         pos = iwl_print_event_log(priv, next_entry - size,
1801                                                   size, mode, pos, buf, bufsz);
1802         } else {
1803                 if (next_entry < size) {
1804                         pos = iwl_print_event_log(priv, 0, next_entry,
1805                                                   mode, pos, buf, bufsz);
1806                 } else {
1807                         pos = iwl_print_event_log(priv, next_entry - size,
1808                                                   size, mode, pos, buf, bufsz);
1809                 }
1810         }
1811         return pos;
1812 }
1813
1814 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1815
1816 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1817                             char **buf, bool display)
1818 {
1819         u32 base;       /* SRAM byte address of event log header */
1820         u32 capacity;   /* event log capacity in # entries */
1821         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1822         u32 num_wraps;  /* # times uCode wrapped to top of log */
1823         u32 next_entry; /* index of next entry to be written by uCode */
1824         u32 size;       /* # entries that we'll print */
1825         u32 logsize;
1826         int pos = 0;
1827         size_t bufsz = 0;
1828
1829         base = priv->device_pointers.log_event_table;
1830         if (priv->ucode_type == IWL_UCODE_INIT) {
1831                 logsize = priv->_agn.init_evtlog_size;
1832                 if (!base)
1833                         base = priv->_agn.init_evtlog_ptr;
1834         } else {
1835                 logsize = priv->_agn.inst_evtlog_size;
1836                 if (!base)
1837                         base = priv->_agn.inst_evtlog_ptr;
1838         }
1839
1840         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1841                 IWL_ERR(priv,
1842                         "Invalid event log pointer 0x%08X for %s uCode\n",
1843                         base,
1844                         (priv->ucode_type == IWL_UCODE_INIT)
1845                                         ? "Init" : "RT");
1846                 return -EINVAL;
1847         }
1848
1849         /* event log header */
1850         capacity = iwl_read_targ_mem(priv, base);
1851         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1852         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1853         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1854
1855         if (capacity > logsize) {
1856                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1857                         capacity, logsize);
1858                 capacity = logsize;
1859         }
1860
1861         if (next_entry > logsize) {
1862                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1863                         next_entry, logsize);
1864                 next_entry = logsize;
1865         }
1866
1867         size = num_wraps ? capacity : next_entry;
1868
1869         /* bail out if nothing in log */
1870         if (size == 0) {
1871                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1872                 return pos;
1873         }
1874
1875         /* enable/disable bt channel inhibition */
1876         priv->bt_ch_announce = iwlagn_bt_ch_announce;
1877
1878 #ifdef CONFIG_IWLWIFI_DEBUG
1879         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1880                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1881                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1882 #else
1883         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1884                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1885 #endif
1886         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1887                 size);
1888
1889 #ifdef CONFIG_IWLWIFI_DEBUG
1890         if (display) {
1891                 if (full_log)
1892                         bufsz = capacity * 48;
1893                 else
1894                         bufsz = size * 48;
1895                 *buf = kmalloc(bufsz, GFP_KERNEL);
1896                 if (!*buf)
1897                         return -ENOMEM;
1898         }
1899         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1900                 /*
1901                  * if uCode has wrapped back to top of log,
1902                  * start at the oldest entry,
1903                  * i.e the next one that uCode would fill.
1904                  */
1905                 if (num_wraps)
1906                         pos = iwl_print_event_log(priv, next_entry,
1907                                                 capacity - next_entry, mode,
1908                                                 pos, buf, bufsz);
1909                 /* (then/else) start at top of log */
1910                 pos = iwl_print_event_log(priv, 0,
1911                                           next_entry, mode, pos, buf, bufsz);
1912         } else
1913                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1914                                                 next_entry, size, mode,
1915                                                 pos, buf, bufsz);
1916 #else
1917         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1918                                         next_entry, size, mode,
1919                                         pos, buf, bufsz);
1920 #endif
1921         return pos;
1922 }
1923
1924 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1925 {
1926         struct iwl_ct_kill_config cmd;
1927         struct iwl_ct_kill_throttling_config adv_cmd;
1928         unsigned long flags;
1929         int ret = 0;
1930
1931         spin_lock_irqsave(&priv->lock, flags);
1932         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1933                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1934         spin_unlock_irqrestore(&priv->lock, flags);
1935         priv->thermal_throttle.ct_kill_toggle = false;
1936
1937         if (priv->cfg->base_params->support_ct_kill_exit) {
1938                 adv_cmd.critical_temperature_enter =
1939                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1940                 adv_cmd.critical_temperature_exit =
1941                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1942
1943                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1944                                        sizeof(adv_cmd), &adv_cmd);
1945                 if (ret)
1946                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1947                 else
1948                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1949                                         "succeeded, "
1950                                         "critical temperature enter is %d,"
1951                                         "exit is %d\n",
1952                                        priv->hw_params.ct_kill_threshold,
1953                                        priv->hw_params.ct_kill_exit_threshold);
1954         } else {
1955                 cmd.critical_temperature_R =
1956                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1957
1958                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1959                                        sizeof(cmd), &cmd);
1960                 if (ret)
1961                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1962                 else
1963                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1964                                         "succeeded, "
1965                                         "critical temperature is %d\n",
1966                                         priv->hw_params.ct_kill_threshold);
1967         }
1968 }
1969
1970 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1971 {
1972         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1973         struct iwl_host_cmd cmd = {
1974                 .id = CALIBRATION_CFG_CMD,
1975                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1976                 .data = { &calib_cfg_cmd, },
1977         };
1978
1979         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1980         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1981         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1982
1983         return iwl_send_cmd(priv, &cmd);
1984 }
1985
1986
1987 /**
1988  * iwl_alive_start - called after REPLY_ALIVE notification received
1989  *                   from protocol/runtime uCode (initialization uCode's
1990  *                   Alive gets handled by iwl_init_alive_start()).
1991  */
1992 int iwl_alive_start(struct iwl_priv *priv)
1993 {
1994         int ret = 0;
1995         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1996
1997         iwl_reset_ict(priv);
1998
1999         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2000
2001         /* After the ALIVE response, we can send host commands to the uCode */
2002         set_bit(STATUS_ALIVE, &priv->status);
2003
2004         /* Enable watchdog to monitor the driver tx queues */
2005         iwl_setup_watchdog(priv);
2006
2007         if (iwl_is_rfkill(priv))
2008                 return -ERFKILL;
2009
2010         /* download priority table before any calibration request */
2011         if (priv->cfg->bt_params &&
2012             priv->cfg->bt_params->advanced_bt_coexist) {
2013                 /* Configure Bluetooth device coexistence support */
2014                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2015                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2016                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2017                 iwlagn_send_advance_bt_config(priv);
2018                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2019                 iwlagn_send_prio_tbl(priv);
2020
2021                 /* FIXME: w/a to force change uCode BT state machine */
2022                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2023                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2024                 if (ret)
2025                         return ret;
2026                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2027                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2028                 if (ret)
2029                         return ret;
2030         } else {
2031                 /*
2032                  * default is 2-wire BT coexexistence support
2033                  */
2034                 iwl_send_bt_config(priv);
2035         }
2036
2037         if (priv->hw_params.calib_rt_cfg)
2038                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2039
2040         ieee80211_wake_queues(priv->hw);
2041
2042         priv->active_rate = IWL_RATES_MASK;
2043
2044         /* Configure Tx antenna selection based on H/W config */
2045         iwlagn_send_tx_ant_config(priv, priv->cfg->valid_tx_ant);
2046
2047         if (iwl_is_associated_ctx(ctx)) {
2048                 struct iwl_rxon_cmd *active_rxon =
2049                                 (struct iwl_rxon_cmd *)&ctx->active;
2050                 /* apply any changes in staging */
2051                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2052                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2053         } else {
2054                 struct iwl_rxon_context *tmp;
2055                 /* Initialize our rx_config data */
2056                 for_each_context(priv, tmp)
2057                         iwl_connection_init_rx_config(priv, tmp);
2058
2059                 iwlagn_set_rxon_chain(priv, ctx);
2060         }
2061
2062         iwl_reset_run_time_calib(priv);
2063
2064         set_bit(STATUS_READY, &priv->status);
2065
2066         /* Configure the adapter for unassociated operation */
2067         ret = iwlagn_commit_rxon(priv, ctx);
2068         if (ret)
2069                 return ret;
2070
2071         /* At this point, the NIC is initialized and operational */
2072         iwl_rf_kill_ct_config(priv);
2073
2074         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2075
2076         return iwl_power_update_mode(priv, true);
2077 }
2078
2079 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2080
2081 static void __iwl_down(struct iwl_priv *priv)
2082 {
2083         int exit_pending;
2084
2085         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2086
2087         iwl_scan_cancel_timeout(priv, 200);
2088
2089         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2090
2091         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2092          * to prevent rearm timer */
2093         del_timer_sync(&priv->watchdog);
2094
2095         iwl_clear_ucode_stations(priv, NULL);
2096         iwl_dealloc_bcast_stations(priv);
2097         iwl_clear_driver_stations(priv);
2098
2099         /* reset BT coex data */
2100         priv->bt_status = 0;
2101         if (priv->cfg->bt_params)
2102                 priv->bt_traffic_load =
2103                          priv->cfg->bt_params->bt_init_traffic_load;
2104         else
2105                 priv->bt_traffic_load = 0;
2106         priv->bt_full_concurrent = false;
2107         priv->bt_ci_compliance = 0;
2108
2109         /* Wipe out the EXIT_PENDING status bit if we are not actually
2110          * exiting the module */
2111         if (!exit_pending)
2112                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2113
2114         if (priv->mac80211_registered)
2115                 ieee80211_stop_queues(priv->hw);
2116
2117         /* Clear out all status bits but a few that are stable across reset */
2118         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2119                                 STATUS_RF_KILL_HW |
2120                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2121                                 STATUS_GEO_CONFIGURED |
2122                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2123                                 STATUS_FW_ERROR |
2124                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2125                                 STATUS_EXIT_PENDING;
2126
2127         iwlagn_stop_device(priv);
2128
2129         dev_kfree_skb(priv->beacon_skb);
2130         priv->beacon_skb = NULL;
2131 }
2132
2133 static void iwl_down(struct iwl_priv *priv)
2134 {
2135         mutex_lock(&priv->mutex);
2136         __iwl_down(priv);
2137         mutex_unlock(&priv->mutex);
2138
2139         iwl_cancel_deferred_work(priv);
2140 }
2141
2142 #define HW_READY_TIMEOUT (50)
2143
2144 /* Note: returns poll_bit return value, which is >= 0 if success */
2145 static int iwl_set_hw_ready(struct iwl_priv *priv)
2146 {
2147         int ret;
2148
2149         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2150                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2151
2152         /* See if we got it */
2153         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2154                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2155                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2156                                 HW_READY_TIMEOUT);
2157
2158         IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2159         return ret;
2160 }
2161
2162 /* Note: returns standard 0/-ERROR code */
2163 int iwl_prepare_card_hw(struct iwl_priv *priv)
2164 {
2165         int ret;
2166
2167         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2168
2169         ret = iwl_set_hw_ready(priv);
2170         if (ret >= 0)
2171                 return 0;
2172
2173         /* If HW is not ready, prepare the conditions to check again */
2174         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2175                         CSR_HW_IF_CONFIG_REG_PREPARE);
2176
2177         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2178                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2179                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2180
2181         if (ret < 0)
2182                 return ret;
2183
2184         /* HW should be ready by now, check again. */
2185         ret = iwl_set_hw_ready(priv);
2186         if (ret >= 0)
2187                 return 0;
2188         return ret;
2189 }
2190
2191 #define MAX_HW_RESTARTS 5
2192
2193 static int __iwl_up(struct iwl_priv *priv)
2194 {
2195         struct iwl_rxon_context *ctx;
2196         int ret;
2197
2198         lockdep_assert_held(&priv->mutex);
2199
2200         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2201                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2202                 return -EIO;
2203         }
2204
2205         for_each_context(priv, ctx) {
2206                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2207                 if (ret) {
2208                         iwl_dealloc_bcast_stations(priv);
2209                         return ret;
2210                 }
2211         }
2212
2213         ret = iwlagn_run_init_ucode(priv);
2214         if (ret) {
2215                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2216                 goto error;
2217         }
2218
2219         ret = iwlagn_load_ucode_wait_alive(priv,
2220                                            &priv->ucode_rt,
2221                                            IWL_UCODE_REGULAR);
2222         if (ret) {
2223                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2224                 goto error;
2225         }
2226
2227         ret = iwl_alive_start(priv);
2228         if (ret)
2229                 goto error;
2230         return 0;
2231
2232  error:
2233         set_bit(STATUS_EXIT_PENDING, &priv->status);
2234         __iwl_down(priv);
2235         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2236
2237         IWL_ERR(priv, "Unable to initialize device.\n");
2238         return ret;
2239 }
2240
2241
2242 /*****************************************************************************
2243  *
2244  * Workqueue callbacks
2245  *
2246  *****************************************************************************/
2247
2248 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2249 {
2250         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2251                         run_time_calib_work);
2252
2253         mutex_lock(&priv->mutex);
2254
2255         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2256             test_bit(STATUS_SCANNING, &priv->status)) {
2257                 mutex_unlock(&priv->mutex);
2258                 return;
2259         }
2260
2261         if (priv->start_calib) {
2262                 iwl_chain_noise_calibration(priv);
2263                 iwl_sensitivity_calibration(priv);
2264         }
2265
2266         mutex_unlock(&priv->mutex);
2267 }
2268
2269 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2270 {
2271         struct iwl_rxon_context *ctx;
2272         bool bt_full_concurrent;
2273         u8 bt_ci_compliance;
2274         u8 bt_load;
2275         u8 bt_status;
2276
2277         lockdep_assert_held(&priv->mutex);
2278
2279         for_each_context(priv, ctx)
2280                 ctx->vif = NULL;
2281         priv->is_open = 0;
2282
2283         /*
2284          * __iwl_down() will clear the BT status variables,
2285          * which is correct, but when we restart we really
2286          * want to keep them so restore them afterwards.
2287          *
2288          * The restart process will later pick them up and
2289          * re-configure the hw when we reconfigure the BT
2290          * command.
2291          */
2292         bt_full_concurrent = priv->bt_full_concurrent;
2293         bt_ci_compliance = priv->bt_ci_compliance;
2294         bt_load = priv->bt_traffic_load;
2295         bt_status = priv->bt_status;
2296
2297         __iwl_down(priv);
2298
2299         priv->bt_full_concurrent = bt_full_concurrent;
2300         priv->bt_ci_compliance = bt_ci_compliance;
2301         priv->bt_traffic_load = bt_load;
2302         priv->bt_status = bt_status;
2303 }
2304
2305 static void iwl_bg_restart(struct work_struct *data)
2306 {
2307         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2308
2309         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2310                 return;
2311
2312         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2313                 mutex_lock(&priv->mutex);
2314                 iwlagn_prepare_restart(priv);
2315                 mutex_unlock(&priv->mutex);
2316                 iwl_cancel_deferred_work(priv);
2317                 ieee80211_restart_hw(priv->hw);
2318         } else {
2319                 WARN_ON(1);
2320         }
2321 }
2322
2323 static void iwl_bg_rx_replenish(struct work_struct *data)
2324 {
2325         struct iwl_priv *priv =
2326             container_of(data, struct iwl_priv, rx_replenish);
2327
2328         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2329                 return;
2330
2331         mutex_lock(&priv->mutex);
2332         iwlagn_rx_replenish(priv);
2333         mutex_unlock(&priv->mutex);
2334 }
2335
2336 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2337                                  struct ieee80211_channel *chan,
2338                                  enum nl80211_channel_type channel_type,
2339                                  unsigned int wait)
2340 {
2341         struct iwl_priv *priv = hw->priv;
2342         int ret;
2343
2344         /* Not supported if we don't have PAN */
2345         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2346                 ret = -EOPNOTSUPP;
2347                 goto free;
2348         }
2349
2350         /* Not supported on pre-P2P firmware */
2351         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2352                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2353                 ret = -EOPNOTSUPP;
2354                 goto free;
2355         }
2356
2357         mutex_lock(&priv->mutex);
2358
2359         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2360                 /*
2361                  * If the PAN context is free, use the normal
2362                  * way of doing remain-on-channel offload + TX.
2363                  */
2364                 ret = 1;
2365                 goto out;
2366         }
2367
2368         /* TODO: queue up if scanning? */
2369         if (test_bit(STATUS_SCANNING, &priv->status) ||
2370             priv->_agn.offchan_tx_skb) {
2371                 ret = -EBUSY;
2372                 goto out;
2373         }
2374
2375         /*
2376          * max_scan_ie_len doesn't include the blank SSID or the header,
2377          * so need to add that again here.
2378          */
2379         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2380                 ret = -ENOBUFS;
2381                 goto out;
2382         }
2383
2384         priv->_agn.offchan_tx_skb = skb;
2385         priv->_agn.offchan_tx_timeout = wait;
2386         priv->_agn.offchan_tx_chan = chan;
2387
2388         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2389                                 IWL_SCAN_OFFCH_TX, chan->band);
2390         if (ret)
2391                 priv->_agn.offchan_tx_skb = NULL;
2392  out:
2393         mutex_unlock(&priv->mutex);
2394  free:
2395         if (ret < 0)
2396                 kfree_skb(skb);
2397
2398         return ret;
2399 }
2400
2401 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2402 {
2403         struct iwl_priv *priv = hw->priv;
2404         int ret;
2405
2406         mutex_lock(&priv->mutex);
2407
2408         if (!priv->_agn.offchan_tx_skb) {
2409                 ret = -EINVAL;
2410                 goto unlock;
2411         }
2412
2413         priv->_agn.offchan_tx_skb = NULL;
2414
2415         ret = iwl_scan_cancel_timeout(priv, 200);
2416         if (ret)
2417                 ret = -EIO;
2418 unlock:
2419         mutex_unlock(&priv->mutex);
2420
2421         return ret;
2422 }
2423
2424 /*****************************************************************************
2425  *
2426  * mac80211 entry point functions
2427  *
2428  *****************************************************************************/
2429
2430 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2431         {
2432                 .max = 1,
2433                 .types = BIT(NL80211_IFTYPE_STATION),
2434         },
2435         {
2436                 .max = 1,
2437                 .types = BIT(NL80211_IFTYPE_AP),
2438         },
2439 };
2440
2441 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2442         {
2443                 .max = 2,
2444                 .types = BIT(NL80211_IFTYPE_STATION),
2445         },
2446 };
2447
2448 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2449         {
2450                 .max = 1,
2451                 .types = BIT(NL80211_IFTYPE_STATION),
2452         },
2453         {
2454                 .max = 1,
2455                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2456                          BIT(NL80211_IFTYPE_AP),
2457         },
2458 };
2459
2460 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2461         {
2462                 .max = 2,
2463                 .types = BIT(NL80211_IFTYPE_STATION),
2464         },
2465         {
2466                 .max = 1,
2467                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2468         },
2469 };
2470
2471 static const struct ieee80211_iface_combination
2472 iwlagn_iface_combinations_dualmode[] = {
2473         { .num_different_channels = 1,
2474           .max_interfaces = 2,
2475           .beacon_int_infra_match = true,
2476           .limits = iwlagn_sta_ap_limits,
2477           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2478         },
2479         { .num_different_channels = 1,
2480           .max_interfaces = 2,
2481           .limits = iwlagn_2sta_limits,
2482           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2483         },
2484 };
2485
2486 static const struct ieee80211_iface_combination
2487 iwlagn_iface_combinations_p2p[] = {
2488         { .num_different_channels = 1,
2489           .max_interfaces = 2,
2490           .beacon_int_infra_match = true,
2491           .limits = iwlagn_p2p_sta_go_limits,
2492           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2493         },
2494         { .num_different_channels = 1,
2495           .max_interfaces = 2,
2496           .limits = iwlagn_p2p_2sta_limits,
2497           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2498         },
2499 };
2500
2501 /*
2502  * Not a mac80211 entry point function, but it fits in with all the
2503  * other mac80211 functions grouped here.
2504  */
2505 static int iwl_mac_setup_register(struct iwl_priv *priv,
2506                                   struct iwlagn_ucode_capabilities *capa)
2507 {
2508         int ret;
2509         struct ieee80211_hw *hw = priv->hw;
2510         struct iwl_rxon_context *ctx;
2511
2512         hw->rate_control_algorithm = "iwl-agn-rs";
2513
2514         /* Tell mac80211 our characteristics */
2515         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2516                     IEEE80211_HW_AMPDU_AGGREGATION |
2517                     IEEE80211_HW_NEED_DTIM_PERIOD |
2518                     IEEE80211_HW_SPECTRUM_MGMT |
2519                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2520
2521         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2522
2523         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2524                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2525
2526         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2527                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2528                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2529
2530         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2531                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2532
2533         hw->sta_data_size = sizeof(struct iwl_station_priv);
2534         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2535
2536         for_each_context(priv, ctx) {
2537                 hw->wiphy->interface_modes |= ctx->interface_modes;
2538                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2539         }
2540
2541         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2542
2543         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2544                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2545                 hw->wiphy->n_iface_combinations =
2546                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2547         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2548                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2549                 hw->wiphy->n_iface_combinations =
2550                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2551         }
2552
2553         hw->wiphy->max_remain_on_channel_duration = 1000;
2554
2555         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2556                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2557                             WIPHY_FLAG_IBSS_RSN;
2558
2559         if (iwlagn_mod_params.power_save)
2560                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2561         else
2562                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2563
2564         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2565         /* we create the 802.11 header and a zero-length SSID element */
2566         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2567
2568         /* Default value; 4 EDCA QOS priorities */
2569         hw->queues = 4;
2570
2571         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2572
2573         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2574                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2575                         &priv->bands[IEEE80211_BAND_2GHZ];
2576         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2577                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2578                         &priv->bands[IEEE80211_BAND_5GHZ];
2579
2580         iwl_leds_init(priv);
2581
2582         ret = ieee80211_register_hw(priv->hw);
2583         if (ret) {
2584                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2585                 return ret;
2586         }
2587         priv->mac80211_registered = 1;
2588
2589         return 0;
2590 }
2591
2592
2593 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2594 {
2595         struct iwl_priv *priv = hw->priv;
2596         int ret;
2597
2598         IWL_DEBUG_MAC80211(priv, "enter\n");
2599
2600         /* we should be verifying the device is ready to be opened */
2601         mutex_lock(&priv->mutex);
2602         ret = __iwl_up(priv);
2603         mutex_unlock(&priv->mutex);
2604         if (ret)
2605                 return ret;
2606
2607         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2608
2609         /* Now we should be done, and the READY bit should be set. */
2610         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2611                 ret = -EIO;
2612
2613         iwlagn_led_enable(priv);
2614
2615         priv->is_open = 1;
2616         IWL_DEBUG_MAC80211(priv, "leave\n");
2617         return 0;
2618 }
2619
2620 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2621 {
2622         struct iwl_priv *priv = hw->priv;
2623
2624         IWL_DEBUG_MAC80211(priv, "enter\n");
2625
2626         if (!priv->is_open)
2627                 return;
2628
2629         priv->is_open = 0;
2630
2631         iwl_down(priv);
2632
2633         flush_workqueue(priv->workqueue);
2634
2635         /* User space software may expect getting rfkill changes
2636          * even if interface is down */
2637         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2638         iwl_enable_rfkill_int(priv);
2639
2640         IWL_DEBUG_MAC80211(priv, "leave\n");
2641 }
2642
2643 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2644 {
2645         struct iwl_priv *priv = hw->priv;
2646
2647         IWL_DEBUG_MACDUMP(priv, "enter\n");
2648
2649         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2650                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2651
2652         if (iwlagn_tx_skb(priv, skb))
2653                 dev_kfree_skb_any(skb);
2654
2655         IWL_DEBUG_MACDUMP(priv, "leave\n");
2656 }
2657
2658 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2659                                        struct ieee80211_vif *vif,
2660                                        struct ieee80211_key_conf *keyconf,
2661                                        struct ieee80211_sta *sta,
2662                                        u32 iv32, u16 *phase1key)
2663 {
2664         struct iwl_priv *priv = hw->priv;
2665         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2666
2667         IWL_DEBUG_MAC80211(priv, "enter\n");
2668
2669         iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2670                             iv32, phase1key);
2671
2672         IWL_DEBUG_MAC80211(priv, "leave\n");
2673 }
2674
2675 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2676                               struct ieee80211_vif *vif,
2677                               struct ieee80211_sta *sta,
2678                               struct ieee80211_key_conf *key)
2679 {
2680         struct iwl_priv *priv = hw->priv;
2681         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2682         struct iwl_rxon_context *ctx = vif_priv->ctx;
2683         int ret;
2684         u8 sta_id;
2685         bool is_default_wep_key = false;
2686
2687         IWL_DEBUG_MAC80211(priv, "enter\n");
2688
2689         if (iwlagn_mod_params.sw_crypto) {
2690                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2691                 return -EOPNOTSUPP;
2692         }
2693
2694         /*
2695          * To support IBSS RSN, don't program group keys in IBSS, the
2696          * hardware will then not attempt to decrypt the frames.
2697          */
2698         if (vif->type == NL80211_IFTYPE_ADHOC &&
2699             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2700                 return -EOPNOTSUPP;
2701
2702         sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2703         if (sta_id == IWL_INVALID_STATION)
2704                 return -EINVAL;
2705
2706         mutex_lock(&priv->mutex);
2707         iwl_scan_cancel_timeout(priv, 100);
2708
2709         /*
2710          * If we are getting WEP group key and we didn't receive any key mapping
2711          * so far, we are in legacy wep mode (group key only), otherwise we are
2712          * in 1X mode.
2713          * In legacy wep mode, we use another host command to the uCode.
2714          */
2715         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2716              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2717             !sta) {
2718                 if (cmd == SET_KEY)
2719                         is_default_wep_key = !ctx->key_mapping_keys;
2720                 else
2721                         is_default_wep_key =
2722                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2723         }
2724
2725         switch (cmd) {
2726         case SET_KEY:
2727                 if (is_default_wep_key)
2728                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2729                 else
2730                         ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2731                                                   key, sta_id);
2732
2733                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2734                 break;
2735         case DISABLE_KEY:
2736                 if (is_default_wep_key)
2737                         ret = iwl_remove_default_wep_key(priv, ctx, key);
2738                 else
2739                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2740
2741                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2742                 break;
2743         default:
2744                 ret = -EINVAL;
2745         }
2746
2747         mutex_unlock(&priv->mutex);
2748         IWL_DEBUG_MAC80211(priv, "leave\n");
2749
2750         return ret;
2751 }
2752
2753 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2754                                    struct ieee80211_vif *vif,
2755                                    enum ieee80211_ampdu_mlme_action action,
2756                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2757                                    u8 buf_size)
2758 {
2759         struct iwl_priv *priv = hw->priv;
2760         int ret = -EINVAL;
2761         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2762
2763         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2764                      sta->addr, tid);
2765
2766         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2767                 return -EACCES;
2768
2769         mutex_lock(&priv->mutex);
2770
2771         switch (action) {
2772         case IEEE80211_AMPDU_RX_START:
2773                 IWL_DEBUG_HT(priv, "start Rx\n");
2774                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2775                 break;
2776         case IEEE80211_AMPDU_RX_STOP:
2777                 IWL_DEBUG_HT(priv, "stop Rx\n");
2778                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2779                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2780                         ret = 0;
2781                 break;
2782         case IEEE80211_AMPDU_TX_START:
2783                 IWL_DEBUG_HT(priv, "start Tx\n");
2784                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2785                 if (ret == 0) {
2786                         priv->_agn.agg_tids_count++;
2787                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2788                                      priv->_agn.agg_tids_count);
2789                 }
2790                 break;
2791         case IEEE80211_AMPDU_TX_STOP:
2792                 IWL_DEBUG_HT(priv, "stop Tx\n");
2793                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2794                 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2795                         priv->_agn.agg_tids_count--;
2796                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2797                                      priv->_agn.agg_tids_count);
2798                 }
2799                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2800                         ret = 0;
2801                 if (priv->cfg->ht_params &&
2802                     priv->cfg->ht_params->use_rts_for_aggregation) {
2803                         /*
2804                          * switch off RTS/CTS if it was previously enabled
2805                          */
2806                         sta_priv->lq_sta.lq.general_params.flags &=
2807                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2808                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2809                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2810                 }
2811                 break;
2812         case IEEE80211_AMPDU_TX_OPERATIONAL:
2813                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2814
2815                 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2816
2817                 /*
2818                  * If the limit is 0, then it wasn't initialised yet,
2819                  * use the default. We can do that since we take the
2820                  * minimum below, and we don't want to go above our
2821                  * default due to hardware restrictions.
2822                  */
2823                 if (sta_priv->max_agg_bufsize == 0)
2824                         sta_priv->max_agg_bufsize =
2825                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2826
2827                 /*
2828                  * Even though in theory the peer could have different
2829                  * aggregation reorder buffer sizes for different sessions,
2830                  * our ucode doesn't allow for that and has a global limit
2831                  * for each station. Therefore, use the minimum of all the
2832                  * aggregation sessions and our default value.
2833                  */
2834                 sta_priv->max_agg_bufsize =
2835                         min(sta_priv->max_agg_bufsize, buf_size);
2836
2837                 if (priv->cfg->ht_params &&
2838                     priv->cfg->ht_params->use_rts_for_aggregation) {
2839                         /*
2840                          * switch to RTS/CTS if it is the prefer protection
2841                          * method for HT traffic
2842                          */
2843
2844                         sta_priv->lq_sta.lq.general_params.flags |=
2845                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2846                 }
2847
2848                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2849                         sta_priv->max_agg_bufsize;
2850
2851                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2852                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2853
2854                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2855                          sta->addr, tid);
2856                 ret = 0;
2857                 break;
2858         }
2859         mutex_unlock(&priv->mutex);
2860
2861         return ret;
2862 }
2863
2864 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2865                               struct ieee80211_vif *vif,
2866                               struct ieee80211_sta *sta)
2867 {
2868         struct iwl_priv *priv = hw->priv;
2869         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2870         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2871         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2872         int ret;
2873         u8 sta_id;
2874
2875         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2876                         sta->addr);
2877         mutex_lock(&priv->mutex);
2878         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2879                         sta->addr);
2880         sta_priv->common.sta_id = IWL_INVALID_STATION;
2881
2882         atomic_set(&sta_priv->pending_frames, 0);
2883         if (vif->type == NL80211_IFTYPE_AP)
2884                 sta_priv->client = true;
2885
2886         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2887                                      is_ap, sta, &sta_id);
2888         if (ret) {
2889                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2890                         sta->addr, ret);
2891                 /* Should we return success if return code is EEXIST ? */
2892                 mutex_unlock(&priv->mutex);
2893                 return ret;
2894         }
2895
2896         sta_priv->common.sta_id = sta_id;
2897
2898         /* Initialize rate scaling */
2899         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2900                        sta->addr);
2901         iwl_rs_rate_init(priv, sta, sta_id);
2902         mutex_unlock(&priv->mutex);
2903
2904         return 0;
2905 }
2906
2907 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2908                                 struct ieee80211_channel_switch *ch_switch)
2909 {
2910         struct iwl_priv *priv = hw->priv;
2911         const struct iwl_channel_info *ch_info;
2912         struct ieee80211_conf *conf = &hw->conf;
2913         struct ieee80211_channel *channel = ch_switch->channel;
2914         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2915         /*
2916          * MULTI-FIXME
2917          * When we add support for multiple interfaces, we need to
2918          * revisit this. The channel switch command in the device
2919          * only affects the BSS context, but what does that really
2920          * mean? And what if we get a CSA on the second interface?
2921          * This needs a lot of work.
2922          */
2923         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2924         u16 ch;
2925
2926         IWL_DEBUG_MAC80211(priv, "enter\n");
2927
2928         mutex_lock(&priv->mutex);
2929
2930         if (iwl_is_rfkill(priv))
2931                 goto out;
2932
2933         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2934             test_bit(STATUS_SCANNING, &priv->status) ||
2935             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2936                 goto out;
2937
2938         if (!iwl_is_associated_ctx(ctx))
2939                 goto out;
2940
2941         if (!priv->cfg->ops->lib->set_channel_switch)
2942                 goto out;
2943
2944         ch = channel->hw_value;
2945         if (le16_to_cpu(ctx->active.channel) == ch)
2946                 goto out;
2947
2948         ch_info = iwl_get_channel_info(priv, channel->band, ch);
2949         if (!is_channel_valid(ch_info)) {
2950                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2951                 goto out;
2952         }
2953
2954         spin_lock_irq(&priv->lock);
2955
2956         priv->current_ht_config.smps = conf->smps_mode;
2957
2958         /* Configure HT40 channels */
2959         ctx->ht.enabled = conf_is_ht(conf);
2960         if (ctx->ht.enabled) {
2961                 if (conf_is_ht40_minus(conf)) {
2962                         ctx->ht.extension_chan_offset =
2963                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2964                         ctx->ht.is_40mhz = true;
2965                 } else if (conf_is_ht40_plus(conf)) {
2966                         ctx->ht.extension_chan_offset =
2967                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2968                         ctx->ht.is_40mhz = true;
2969                 } else {
2970                         ctx->ht.extension_chan_offset =
2971                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2972                         ctx->ht.is_40mhz = false;
2973                 }
2974         } else
2975                 ctx->ht.is_40mhz = false;
2976
2977         if ((le16_to_cpu(ctx->staging.channel) != ch))
2978                 ctx->staging.flags = 0;
2979
2980         iwl_set_rxon_channel(priv, channel, ctx);
2981         iwl_set_rxon_ht(priv, ht_conf);
2982         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2983
2984         spin_unlock_irq(&priv->lock);
2985
2986         iwl_set_rate(priv);
2987         /*
2988          * at this point, staging_rxon has the
2989          * configuration for channel switch
2990          */
2991         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2992         priv->switch_channel = cpu_to_le16(ch);
2993         if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
2994                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2995                 priv->switch_channel = 0;
2996                 ieee80211_chswitch_done(ctx->vif, false);
2997         }
2998
2999 out:
3000         mutex_unlock(&priv->mutex);
3001         IWL_DEBUG_MAC80211(priv, "leave\n");
3002 }
3003
3004 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3005                                     unsigned int changed_flags,
3006                                     unsigned int *total_flags,
3007                                     u64 multicast)
3008 {
3009         struct iwl_priv *priv = hw->priv;
3010         __le32 filter_or = 0, filter_nand = 0;
3011         struct iwl_rxon_context *ctx;
3012
3013 #define CHK(test, flag) do { \
3014         if (*total_flags & (test))              \
3015                 filter_or |= (flag);            \
3016         else                                    \
3017                 filter_nand |= (flag);          \
3018         } while (0)
3019
3020         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3021                         changed_flags, *total_flags);
3022
3023         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3024         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3025         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3026         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3027
3028 #undef CHK
3029
3030         mutex_lock(&priv->mutex);
3031
3032         for_each_context(priv, ctx) {
3033                 ctx->staging.filter_flags &= ~filter_nand;
3034                 ctx->staging.filter_flags |= filter_or;
3035
3036                 /*
3037                  * Not committing directly because hardware can perform a scan,
3038                  * but we'll eventually commit the filter flags change anyway.
3039                  */
3040         }
3041
3042         mutex_unlock(&priv->mutex);
3043
3044         /*
3045          * Receiving all multicast frames is always enabled by the
3046          * default flags setup in iwl_connection_init_rx_config()
3047          * since we currently do not support programming multicast
3048          * filters into the device.
3049          */
3050         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3051                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3052 }
3053
3054 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3055 {
3056         struct iwl_priv *priv = hw->priv;
3057
3058         mutex_lock(&priv->mutex);
3059         IWL_DEBUG_MAC80211(priv, "enter\n");
3060
3061         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3062                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3063                 goto done;
3064         }
3065         if (iwl_is_rfkill(priv)) {
3066                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3067                 goto done;
3068         }
3069
3070         /*
3071          * mac80211 will not push any more frames for transmit
3072          * until the flush is completed
3073          */
3074         if (drop) {
3075                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3076                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3077                         IWL_ERR(priv, "flush request fail\n");
3078                         goto done;
3079                 }
3080         }
3081         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3082         iwlagn_wait_tx_queue_empty(priv);
3083 done:
3084         mutex_unlock(&priv->mutex);
3085         IWL_DEBUG_MAC80211(priv, "leave\n");
3086 }
3087
3088 static void iwlagn_disable_roc(struct iwl_priv *priv)
3089 {
3090         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3091         struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3092
3093         lockdep_assert_held(&priv->mutex);
3094
3095         if (!ctx->is_active)
3096                 return;
3097
3098         ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3099         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3100         iwl_set_rxon_channel(priv, chan, ctx);
3101         iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3102
3103         priv->_agn.hw_roc_channel = NULL;
3104
3105         iwlagn_commit_rxon(priv, ctx);
3106
3107         ctx->is_active = false;
3108 }
3109
3110 static void iwlagn_bg_roc_done(struct work_struct *work)
3111 {
3112         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3113                                              _agn.hw_roc_work.work);
3114
3115         mutex_lock(&priv->mutex);
3116         ieee80211_remain_on_channel_expired(priv->hw);
3117         iwlagn_disable_roc(priv);
3118         mutex_unlock(&priv->mutex);
3119 }
3120
3121 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3122                                      struct ieee80211_channel *channel,
3123                                      enum nl80211_channel_type channel_type,
3124                                      int duration)
3125 {
3126         struct iwl_priv *priv = hw->priv;
3127         int err = 0;
3128
3129         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3130                 return -EOPNOTSUPP;
3131
3132         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3133                                         BIT(NL80211_IFTYPE_P2P_CLIENT)))
3134                 return -EOPNOTSUPP;
3135
3136         mutex_lock(&priv->mutex);
3137
3138         if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3139             test_bit(STATUS_SCAN_HW, &priv->status)) {
3140                 err = -EBUSY;
3141                 goto out;
3142         }
3143
3144         priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3145         priv->_agn.hw_roc_channel = channel;
3146         priv->_agn.hw_roc_chantype = channel_type;
3147         priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3148         iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3149         queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3150                            msecs_to_jiffies(duration + 20));
3151
3152         msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3153         ieee80211_ready_on_channel(priv->hw);
3154
3155  out:
3156         mutex_unlock(&priv->mutex);
3157
3158         return err;
3159 }
3160
3161 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3162 {
3163         struct iwl_priv *priv = hw->priv;
3164
3165         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3166                 return -EOPNOTSUPP;
3167
3168         cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3169
3170         mutex_lock(&priv->mutex);
3171         iwlagn_disable_roc(priv);
3172         mutex_unlock(&priv->mutex);
3173
3174         return 0;
3175 }
3176
3177 /*****************************************************************************
3178  *
3179  * driver setup and teardown
3180  *
3181  *****************************************************************************/
3182
3183 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3184 {
3185         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3186
3187         init_waitqueue_head(&priv->wait_command_queue);
3188
3189         INIT_WORK(&priv->restart, iwl_bg_restart);
3190         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3191         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3192         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3193         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3194         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3195         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3196         INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3197
3198         iwl_setup_scan_deferred_work(priv);
3199
3200         if (priv->cfg->ops->lib->setup_deferred_work)
3201                 priv->cfg->ops->lib->setup_deferred_work(priv);
3202
3203         init_timer(&priv->statistics_periodic);
3204         priv->statistics_periodic.data = (unsigned long)priv;
3205         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3206
3207         init_timer(&priv->ucode_trace);
3208         priv->ucode_trace.data = (unsigned long)priv;
3209         priv->ucode_trace.function = iwl_bg_ucode_trace;
3210
3211         init_timer(&priv->watchdog);
3212         priv->watchdog.data = (unsigned long)priv;
3213         priv->watchdog.function = iwl_bg_watchdog;
3214
3215         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3216                 iwl_irq_tasklet, (unsigned long)priv);
3217 }
3218
3219 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3220 {
3221         if (priv->cfg->ops->lib->cancel_deferred_work)
3222                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3223
3224         cancel_work_sync(&priv->run_time_calib_work);
3225         cancel_work_sync(&priv->beacon_update);
3226
3227         iwl_cancel_scan_deferred_work(priv);
3228
3229         cancel_work_sync(&priv->bt_full_concurrency);
3230         cancel_work_sync(&priv->bt_runtime_config);
3231
3232         del_timer_sync(&priv->statistics_periodic);
3233         del_timer_sync(&priv->ucode_trace);
3234 }
3235
3236 static void iwl_init_hw_rates(struct iwl_priv *priv,
3237                               struct ieee80211_rate *rates)
3238 {
3239         int i;
3240
3241         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3242                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3243                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3244                 rates[i].hw_value_short = i;
3245                 rates[i].flags = 0;
3246                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3247                         /*
3248                          * If CCK != 1M then set short preamble rate flag.
3249                          */
3250                         rates[i].flags |=
3251                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3252                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3253                 }
3254         }
3255 }
3256
3257 static int iwl_init_drv(struct iwl_priv *priv)
3258 {
3259         int ret;
3260
3261         spin_lock_init(&priv->sta_lock);
3262         spin_lock_init(&priv->hcmd_lock);
3263
3264         mutex_init(&priv->mutex);
3265
3266         priv->ieee_channels = NULL;
3267         priv->ieee_rates = NULL;
3268         priv->band = IEEE80211_BAND_2GHZ;
3269
3270         priv->iw_mode = NL80211_IFTYPE_STATION;
3271         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3272         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3273         priv->_agn.agg_tids_count = 0;
3274
3275         /* initialize force reset */
3276         priv->force_reset[IWL_RF_RESET].reset_duration =
3277                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3278         priv->force_reset[IWL_FW_RESET].reset_duration =
3279                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3280
3281         priv->rx_statistics_jiffies = jiffies;
3282
3283         /* Choose which receivers/antennas to use */
3284         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
3285
3286         iwl_init_scan_params(priv);
3287
3288         /* init bt coex */
3289         if (priv->cfg->bt_params &&
3290             priv->cfg->bt_params->advanced_bt_coexist) {
3291                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3292                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3293                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3294                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3295                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3296                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3297         }
3298
3299         ret = iwl_init_channel_map(priv);
3300         if (ret) {
3301                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3302                 goto err;
3303         }
3304
3305         ret = iwlcore_init_geos(priv);
3306         if (ret) {
3307                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3308                 goto err_free_channel_map;
3309         }
3310         iwl_init_hw_rates(priv, priv->ieee_rates);
3311
3312         return 0;
3313
3314 err_free_channel_map:
3315         iwl_free_channel_map(priv);
3316 err:
3317         return ret;
3318 }
3319
3320 static void iwl_uninit_drv(struct iwl_priv *priv)
3321 {
3322         iwl_calib_free_results(priv);
3323         iwlcore_free_geos(priv);
3324         iwl_free_channel_map(priv);
3325         kfree(priv->scan_cmd);
3326         kfree(priv->beacon_cmd);
3327 }
3328
3329 struct ieee80211_ops iwlagn_hw_ops = {
3330         .tx = iwlagn_mac_tx,
3331         .start = iwlagn_mac_start,
3332         .stop = iwlagn_mac_stop,
3333         .add_interface = iwl_mac_add_interface,
3334         .remove_interface = iwl_mac_remove_interface,
3335         .change_interface = iwl_mac_change_interface,
3336         .config = iwlagn_mac_config,
3337         .configure_filter = iwlagn_configure_filter,
3338         .set_key = iwlagn_mac_set_key,
3339         .update_tkip_key = iwlagn_mac_update_tkip_key,
3340         .conf_tx = iwl_mac_conf_tx,
3341         .bss_info_changed = iwlagn_bss_info_changed,
3342         .ampdu_action = iwlagn_mac_ampdu_action,
3343         .hw_scan = iwl_mac_hw_scan,
3344         .sta_notify = iwlagn_mac_sta_notify,
3345         .sta_add = iwlagn_mac_sta_add,
3346         .sta_remove = iwl_mac_sta_remove,
3347         .channel_switch = iwlagn_mac_channel_switch,
3348         .flush = iwlagn_mac_flush,
3349         .tx_last_beacon = iwl_mac_tx_last_beacon,
3350         .remain_on_channel = iwl_mac_remain_on_channel,
3351         .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3352         .offchannel_tx = iwl_mac_offchannel_tx,
3353         .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3354         CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3355         CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3356 };
3357
3358 static u32 iwl_hw_detect(struct iwl_priv *priv)
3359 {
3360         return iwl_read32(priv, CSR_HW_REV);
3361 }
3362
3363 static int iwl_set_hw_params(struct iwl_priv *priv)
3364 {
3365         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3366         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3367         if (iwlagn_mod_params.amsdu_size_8K)
3368                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3369         else
3370                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3371
3372         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3373
3374         if (iwlagn_mod_params.disable_11n)
3375                 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3376
3377         /* Device-specific setup */
3378         return priv->cfg->ops->lib->set_hw_params(priv);
3379 }
3380
3381 static const u8 iwlagn_bss_ac_to_fifo[] = {
3382         IWL_TX_FIFO_VO,
3383         IWL_TX_FIFO_VI,
3384         IWL_TX_FIFO_BE,
3385         IWL_TX_FIFO_BK,
3386 };
3387
3388 static const u8 iwlagn_bss_ac_to_queue[] = {
3389         0, 1, 2, 3,
3390 };
3391
3392 static const u8 iwlagn_pan_ac_to_fifo[] = {
3393         IWL_TX_FIFO_VO_IPAN,
3394         IWL_TX_FIFO_VI_IPAN,
3395         IWL_TX_FIFO_BE_IPAN,
3396         IWL_TX_FIFO_BK_IPAN,
3397 };
3398
3399 static const u8 iwlagn_pan_ac_to_queue[] = {
3400         7, 6, 5, 4,
3401 };
3402
3403 /* This function both allocates and initializes hw and priv. */
3404 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3405 {
3406         struct iwl_priv *priv;
3407         /* mac80211 allocates memory for this device instance, including
3408          *   space for this driver's private structure */
3409         struct ieee80211_hw *hw;
3410
3411         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3412         if (hw == NULL) {
3413                 pr_err("%s: Can not allocate network device\n",
3414                        cfg->name);
3415                 goto out;
3416         }
3417
3418         priv = hw->priv;
3419         priv->hw = hw;
3420
3421 out:
3422         return hw;
3423 }
3424
3425 static void iwl_init_context(struct iwl_priv *priv)
3426 {
3427         int i;
3428
3429         /*
3430          * The default context is always valid,
3431          * more may be discovered when firmware
3432          * is loaded.
3433          */
3434         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3435
3436         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3437                 priv->contexts[i].ctxid = i;
3438
3439         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3440         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3441         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3442         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3443         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3444         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3445         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3446         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3447         priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3448         priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3449         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3450                 BIT(NL80211_IFTYPE_ADHOC);
3451         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3452                 BIT(NL80211_IFTYPE_STATION);
3453         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3454         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3455         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3456         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3457
3458         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3459         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3460                 REPLY_WIPAN_RXON_TIMING;
3461         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3462                 REPLY_WIPAN_RXON_ASSOC;
3463         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3464         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3465         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3466         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3467         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3468         priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3469         priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3470         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3471         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3472                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3473 #ifdef CONFIG_IWL_P2P
3474         priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3475                 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3476 #endif
3477         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3478         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3479         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3480
3481         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3482 }
3483
3484 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3485                 struct iwl_cfg *cfg)
3486 {
3487         int err = 0;
3488         struct iwl_priv *priv;
3489         struct ieee80211_hw *hw;
3490         u16 num_mac;
3491         u32 hw_rev;
3492
3493         /************************
3494          * 1. Allocating HW data
3495          ************************/
3496         hw = iwl_alloc_all(cfg);
3497         if (!hw) {
3498                 err = -ENOMEM;
3499                 goto out;
3500         }
3501
3502         priv = hw->priv;
3503
3504         priv->bus.priv = priv;
3505         priv->bus.bus_specific = bus_specific;
3506         priv->bus.ops = bus_ops;
3507         priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3508         priv->bus.ops->set_drv_data(&priv->bus, priv);
3509         priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3510
3511         iwl_trans_register(&priv->trans);
3512
3513         /* At this point both hw and priv are allocated. */
3514
3515         SET_IEEE80211_DEV(hw, priv->bus.dev);
3516
3517         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3518         priv->cfg = cfg;
3519         priv->inta_mask = CSR_INI_SET_MASK;
3520
3521         /* is antenna coupling more than 35dB ? */
3522         priv->bt_ant_couple_ok =
3523                 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3524                 true : false;
3525
3526         /* enable/disable bt channel inhibition */
3527         priv->bt_ch_announce = iwlagn_bt_ch_announce;
3528         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3529                        (priv->bt_ch_announce) ? "On" : "Off");
3530
3531         if (iwl_alloc_traffic_mem(priv))
3532                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3533
3534
3535         /* these spin locks will be used in apm_ops.init and EEPROM access
3536          * we should init now
3537          */
3538         spin_lock_init(&priv->reg_lock);
3539         spin_lock_init(&priv->lock);
3540
3541         /*
3542          * stop and reset the on-board processor just in case it is in a
3543          * strange state ... like being left stranded by a primary kernel
3544          * and this is now the kdump kernel trying to start up
3545          */
3546         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3547
3548         /***********************
3549          * 3. Read REV register
3550          ***********************/
3551         hw_rev = iwl_hw_detect(priv);
3552         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3553                 priv->cfg->name, hw_rev);
3554
3555         if (iwl_prepare_card_hw(priv)) {
3556                 err = -EIO;
3557                 IWL_WARN(priv, "Failed, HW not ready\n");
3558                 goto out_free_traffic_mem;
3559         }
3560
3561         /*****************
3562          * 4. Read EEPROM
3563          *****************/
3564         /* Read the EEPROM */
3565         err = iwl_eeprom_init(priv, hw_rev);
3566         if (err) {
3567                 IWL_ERR(priv, "Unable to init EEPROM\n");
3568                 goto out_free_traffic_mem;
3569         }
3570         err = iwl_eeprom_check_version(priv);
3571         if (err)
3572                 goto out_free_eeprom;
3573
3574         err = iwl_eeprom_check_sku(priv);
3575         if (err)
3576                 goto out_free_eeprom;
3577
3578         /* extract MAC Address */
3579         iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3580         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3581         priv->hw->wiphy->addresses = priv->addresses;
3582         priv->hw->wiphy->n_addresses = 1;
3583         num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3584         if (num_mac > 1) {
3585                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3586                        ETH_ALEN);
3587                 priv->addresses[1].addr[5]++;
3588                 priv->hw->wiphy->n_addresses++;
3589         }
3590
3591         /* initialize all valid contexts */
3592         iwl_init_context(priv);
3593
3594         /************************
3595          * 5. Setup HW constants
3596          ************************/
3597         if (iwl_set_hw_params(priv)) {
3598                 err = -ENOENT;
3599                 IWL_ERR(priv, "failed to set hw parameters\n");
3600                 goto out_free_eeprom;
3601         }
3602
3603         /*******************
3604          * 6. Setup priv
3605          *******************/
3606
3607         err = iwl_init_drv(priv);
3608         if (err)
3609                 goto out_free_eeprom;
3610         /* At this point both hw and priv are initialized. */
3611
3612         /********************
3613          * 7. Setup services
3614          ********************/
3615         iwl_alloc_isr_ict(priv);
3616
3617         err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
3618                           DRV_NAME, priv);
3619         if (err) {
3620                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
3621                 goto out_uninit_drv;
3622         }
3623
3624         iwl_setup_deferred_work(priv);
3625         iwl_setup_rx_handlers(priv);
3626         iwl_testmode_init(priv);
3627
3628         /*********************************************
3629          * 8. Enable interrupts
3630          *********************************************/
3631
3632         iwl_enable_rfkill_int(priv);
3633
3634         /* If platform's RF_KILL switch is NOT set to KILL */
3635         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3636                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3637         else
3638                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3639
3640         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3641                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3642
3643         iwl_power_initialize(priv);
3644         iwl_tt_initialize(priv);
3645
3646         init_completion(&priv->_agn.firmware_loading_complete);
3647
3648         err = iwl_request_firmware(priv, true);
3649         if (err)
3650                 goto out_destroy_workqueue;
3651
3652         return 0;
3653
3654  out_destroy_workqueue:
3655         destroy_workqueue(priv->workqueue);
3656         priv->workqueue = NULL;
3657         free_irq(priv->bus.irq, priv);
3658         iwl_free_isr_ict(priv);
3659  out_uninit_drv:
3660         iwl_uninit_drv(priv);
3661  out_free_eeprom:
3662         iwl_eeprom_free(priv);
3663  out_free_traffic_mem:
3664         iwl_free_traffic_mem(priv);
3665         ieee80211_free_hw(priv->hw);
3666  out:
3667         return err;
3668 }
3669
3670 void __devexit iwl_remove(struct iwl_priv * priv)
3671 {
3672         unsigned long flags;
3673
3674         wait_for_completion(&priv->_agn.firmware_loading_complete);
3675
3676         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3677
3678         iwl_dbgfs_unregister(priv);
3679         sysfs_remove_group(&priv->bus.dev->kobj,
3680                            &iwl_attribute_group);
3681
3682         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3683          * to be called and iwl_down since we are removing the device
3684          * we need to set STATUS_EXIT_PENDING bit.
3685          */
3686         set_bit(STATUS_EXIT_PENDING, &priv->status);
3687
3688         iwl_testmode_cleanup(priv);
3689         iwl_leds_exit(priv);
3690
3691         if (priv->mac80211_registered) {
3692                 ieee80211_unregister_hw(priv->hw);
3693                 priv->mac80211_registered = 0;
3694         }
3695
3696         /* Reset to low power before unloading driver. */
3697         iwl_apm_stop(priv);
3698
3699         iwl_tt_exit(priv);
3700
3701         /* make sure we flush any pending irq or
3702          * tasklet for the driver
3703          */
3704         spin_lock_irqsave(&priv->lock, flags);
3705         iwl_disable_interrupts(priv);
3706         spin_unlock_irqrestore(&priv->lock, flags);
3707
3708         iwl_synchronize_irq(priv);
3709
3710         iwl_dealloc_ucode(priv);
3711
3712         priv->trans.ops->rx_free(priv);
3713         iwlagn_hw_txq_ctx_free(priv);
3714
3715         iwl_eeprom_free(priv);
3716
3717
3718         /*netif_stop_queue(dev); */
3719         flush_workqueue(priv->workqueue);
3720
3721         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3722          * priv->workqueue... so we can't take down the workqueue
3723          * until now... */
3724         destroy_workqueue(priv->workqueue);
3725         priv->workqueue = NULL;
3726         iwl_free_traffic_mem(priv);
3727
3728         free_irq(priv->bus.irq, priv);
3729         priv->bus.ops->set_drv_data(&priv->bus, NULL);
3730
3731         iwl_uninit_drv(priv);
3732
3733         iwl_free_isr_ict(priv);
3734
3735         dev_kfree_skb(priv->beacon_skb);
3736
3737         ieee80211_free_hw(priv->hw);
3738 }
3739
3740
3741 /*****************************************************************************
3742  *
3743  * driver and module entry point
3744  *
3745  *****************************************************************************/
3746 static int __init iwl_init(void)
3747 {
3748
3749         int ret;
3750         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3751         pr_info(DRV_COPYRIGHT "\n");
3752
3753         ret = iwlagn_rate_control_register();
3754         if (ret) {
3755                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3756                 return ret;
3757         }
3758
3759         ret = iwl_pci_register_driver();
3760
3761         if (ret)
3762                 goto error_register;
3763         return ret;
3764
3765 error_register:
3766         iwlagn_rate_control_unregister();
3767         return ret;
3768 }
3769
3770 static void __exit iwl_exit(void)
3771 {
3772         iwl_pci_unregister_driver();
3773         iwlagn_rate_control_unregister();
3774 }
3775
3776 module_exit(iwl_exit);
3777 module_init(iwl_init);
3778
3779 #ifdef CONFIG_IWLWIFI_DEBUG
3780 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3781 MODULE_PARM_DESC(debug, "debug output mask");
3782 #endif
3783
3784 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3785 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3786 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3787 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3788 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3789 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3790 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3791                    int, S_IRUGO);
3792 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3793 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3794 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3795
3796 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3797                    S_IRUGO);
3798 MODULE_PARM_DESC(ucode_alternative,
3799                  "specify ucode alternative to use from ucode file");
3800
3801 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3802 MODULE_PARM_DESC(antenna_coupling,
3803                  "specify antenna coupling in dB (defualt: 0 dB)");
3804
3805 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3806 MODULE_PARM_DESC(bt_ch_inhibition,
3807                  "Disable BT channel inhibition (default: enable)");
3808
3809 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3810 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3811
3812 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3813 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3814
3815 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, bool, S_IRUGO);
3816 MODULE_PARM_DESC(wd_disable,
3817                 "Disable stuck queue watchdog timer (default: 0 [enabled])");
3818
3819 /*
3820  * set bt_coex_active to true, uCode will do kill/defer
3821  * every time the priority line is asserted (BT is sending signals on the
3822  * priority line in the PCIx).
3823  * set bt_coex_active to false, uCode will ignore the BT activity and
3824  * perform the normal operation
3825  *
3826  * User might experience transmit issue on some platform due to WiFi/BT
3827  * co-exist problem. The possible behaviors are:
3828  *   Able to scan and finding all the available AP
3829  *   Not able to associate with any AP
3830  * On those platforms, WiFi communication can be restored by set
3831  * "bt_coex_active" module parameter to "false"
3832  *
3833  * default: bt_coex_active = true (BT_COEX_ENABLE)
3834  */
3835 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3836                 bool, S_IRUGO);
3837 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3838
3839 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3840 MODULE_PARM_DESC(led_mode, "0=system default, "
3841                 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3842
3843 module_param_named(power_save, iwlagn_mod_params.power_save,
3844                 bool, S_IRUGO);
3845 MODULE_PARM_DESC(power_save,
3846                  "enable WiFi power management (default: disable)");
3847
3848 module_param_named(power_level, iwlagn_mod_params.power_level,
3849                 int, S_IRUGO);
3850 MODULE_PARM_DESC(power_level,
3851                  "default power save level (range from 1 - 5, default: 1)");
3852
3853 /*
3854  * For now, keep using power level 1 instead of automatically
3855  * adjusting ...
3856  */
3857 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3858                 bool, S_IRUGO);
3859 MODULE_PARM_DESC(no_sleep_autoadjust,
3860                  "don't automatically adjust sleep level "
3861                  "according to maximum network latency (default: true)");