Merge branch 'wireless-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2010 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/pci.h>
36 #include <linux/pci-aspm.h>
37 #include <linux/slab.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/delay.h>
40 #include <linux/sched.h>
41 #include <linux/skbuff.h>
42 #include <linux/netdevice.h>
43 #include <linux/wireless.h>
44 #include <linux/firmware.h>
45 #include <linux/etherdevice.h>
46 #include <linux/if_arp.h>
47
48 #include <net/mac80211.h>
49
50 #include <asm/div64.h>
51
52 #define DRV_NAME        "iwlagn"
53
54 #include "iwl-eeprom.h"
55 #include "iwl-dev.h"
56 #include "iwl-core.h"
57 #include "iwl-io.h"
58 #include "iwl-helpers.h"
59 #include "iwl-sta.h"
60 #include "iwl-agn-calib.h"
61 #include "iwl-agn.h"
62 #include "iwl-agn-led.h"
63
64
65 /******************************************************************************
66  *
67  * module boiler plate
68  *
69  ******************************************************************************/
70
71 /*
72  * module name, copyright, version, etc.
73  */
74 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
75
76 #ifdef CONFIG_IWLWIFI_DEBUG
77 #define VD "d"
78 #else
79 #define VD
80 #endif
81
82 #define DRV_VERSION     IWLWIFI_VERSION VD
83
84
85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
86 MODULE_VERSION(DRV_VERSION);
87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
88 MODULE_LICENSE("GPL");
89
90 static int iwlagn_ant_coupling;
91 static bool iwlagn_bt_ch_announce = 1;
92
93 void iwl_update_chain_flags(struct iwl_priv *priv)
94 {
95         struct iwl_rxon_context *ctx;
96
97         if (priv->cfg->ops->hcmd->set_rxon_chain) {
98                 for_each_context(priv, ctx) {
99                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
100                         if (ctx->active.rx_chain != ctx->staging.rx_chain)
101                                 iwlcore_commit_rxon(priv, ctx);
102                 }
103         }
104 }
105
106 static void iwl_clear_free_frames(struct iwl_priv *priv)
107 {
108         struct list_head *element;
109
110         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
111                        priv->frames_count);
112
113         while (!list_empty(&priv->free_frames)) {
114                 element = priv->free_frames.next;
115                 list_del(element);
116                 kfree(list_entry(element, struct iwl_frame, list));
117                 priv->frames_count--;
118         }
119
120         if (priv->frames_count) {
121                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
122                             priv->frames_count);
123                 priv->frames_count = 0;
124         }
125 }
126
127 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
128 {
129         struct iwl_frame *frame;
130         struct list_head *element;
131         if (list_empty(&priv->free_frames)) {
132                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
133                 if (!frame) {
134                         IWL_ERR(priv, "Could not allocate frame!\n");
135                         return NULL;
136                 }
137
138                 priv->frames_count++;
139                 return frame;
140         }
141
142         element = priv->free_frames.next;
143         list_del(element);
144         return list_entry(element, struct iwl_frame, list);
145 }
146
147 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
148 {
149         memset(frame, 0, sizeof(*frame));
150         list_add(&frame->list, &priv->free_frames);
151 }
152
153 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
154                                  struct ieee80211_hdr *hdr,
155                                  int left)
156 {
157         lockdep_assert_held(&priv->mutex);
158
159         if (!priv->beacon_skb)
160                 return 0;
161
162         if (priv->beacon_skb->len > left)
163                 return 0;
164
165         memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len);
166
167         return priv->beacon_skb->len;
168 }
169
170 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
171 static void iwl_set_beacon_tim(struct iwl_priv *priv,
172                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
173                                u8 *beacon, u32 frame_size)
174 {
175         u16 tim_idx;
176         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
177
178         /*
179          * The index is relative to frame start but we start looking at the
180          * variable-length part of the beacon.
181          */
182         tim_idx = mgmt->u.beacon.variable - beacon;
183
184         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
185         while ((tim_idx < (frame_size - 2)) &&
186                         (beacon[tim_idx] != WLAN_EID_TIM))
187                 tim_idx += beacon[tim_idx+1] + 2;
188
189         /* If TIM field was found, set variables */
190         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
191                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
192                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
193         } else
194                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
195 }
196
197 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
198                                        struct iwl_frame *frame)
199 {
200         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
201         u32 frame_size;
202         u32 rate_flags;
203         u32 rate;
204         /*
205          * We have to set up the TX command, the TX Beacon command, and the
206          * beacon contents.
207          */
208
209         lockdep_assert_held(&priv->mutex);
210
211         if (!priv->beacon_ctx) {
212                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
213                 return 0;
214         }
215
216         /* Initialize memory */
217         tx_beacon_cmd = &frame->u.beacon;
218         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
219
220         /* Set up TX beacon contents */
221         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
222                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
223         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
224                 return 0;
225         if (!frame_size)
226                 return 0;
227
228         /* Set up TX command fields */
229         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
230         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
231         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
232         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
233                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
234
235         /* Set up TX beacon command fields */
236         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
237                            frame_size);
238
239         /* Set up packet rate and flags */
240         rate = iwl_rate_get_lowest_plcp(priv, priv->beacon_ctx);
241         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
242                                               priv->hw_params.valid_tx_ant);
243         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
244         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
245                 rate_flags |= RATE_MCS_CCK_MSK;
246         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
247                         rate_flags);
248
249         return sizeof(*tx_beacon_cmd) + frame_size;
250 }
251
252 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
253 {
254         struct iwl_frame *frame;
255         unsigned int frame_size;
256         int rc;
257
258         frame = iwl_get_free_frame(priv);
259         if (!frame) {
260                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
261                           "command.\n");
262                 return -ENOMEM;
263         }
264
265         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
266         if (!frame_size) {
267                 IWL_ERR(priv, "Error configuring the beacon command\n");
268                 iwl_free_frame(priv, frame);
269                 return -EINVAL;
270         }
271
272         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
273                               &frame->u.cmd[0]);
274
275         iwl_free_frame(priv, frame);
276
277         return rc;
278 }
279
280 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
281 {
282         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
283
284         dma_addr_t addr = get_unaligned_le32(&tb->lo);
285         if (sizeof(dma_addr_t) > sizeof(u32))
286                 addr |=
287                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
288
289         return addr;
290 }
291
292 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
293 {
294         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
295
296         return le16_to_cpu(tb->hi_n_len) >> 4;
297 }
298
299 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
300                                   dma_addr_t addr, u16 len)
301 {
302         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
303         u16 hi_n_len = len << 4;
304
305         put_unaligned_le32(addr, &tb->lo);
306         if (sizeof(dma_addr_t) > sizeof(u32))
307                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
308
309         tb->hi_n_len = cpu_to_le16(hi_n_len);
310
311         tfd->num_tbs = idx + 1;
312 }
313
314 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
315 {
316         return tfd->num_tbs & 0x1f;
317 }
318
319 /**
320  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
321  * @priv - driver private data
322  * @txq - tx queue
323  *
324  * Does NOT advance any TFD circular buffer read/write indexes
325  * Does NOT free the TFD itself (which is within circular buffer)
326  */
327 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
328 {
329         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
330         struct iwl_tfd *tfd;
331         struct pci_dev *dev = priv->pci_dev;
332         int index = txq->q.read_ptr;
333         int i;
334         int num_tbs;
335
336         tfd = &tfd_tmp[index];
337
338         /* Sanity check on number of chunks */
339         num_tbs = iwl_tfd_get_num_tbs(tfd);
340
341         if (num_tbs >= IWL_NUM_OF_TBS) {
342                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
343                 /* @todo issue fatal error, it is quite serious situation */
344                 return;
345         }
346
347         /* Unmap tx_cmd */
348         if (num_tbs)
349                 pci_unmap_single(dev,
350                                 dma_unmap_addr(&txq->meta[index], mapping),
351                                 dma_unmap_len(&txq->meta[index], len),
352                                 PCI_DMA_BIDIRECTIONAL);
353
354         /* Unmap chunks, if any. */
355         for (i = 1; i < num_tbs; i++)
356                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
357                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
358
359         /* free SKB */
360         if (txq->txb) {
361                 struct sk_buff *skb;
362
363                 skb = txq->txb[txq->q.read_ptr].skb;
364
365                 /* can be called from irqs-disabled context */
366                 if (skb) {
367                         dev_kfree_skb_any(skb);
368                         txq->txb[txq->q.read_ptr].skb = NULL;
369                 }
370         }
371 }
372
373 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
374                                  struct iwl_tx_queue *txq,
375                                  dma_addr_t addr, u16 len,
376                                  u8 reset, u8 pad)
377 {
378         struct iwl_queue *q;
379         struct iwl_tfd *tfd, *tfd_tmp;
380         u32 num_tbs;
381
382         q = &txq->q;
383         tfd_tmp = (struct iwl_tfd *)txq->tfds;
384         tfd = &tfd_tmp[q->write_ptr];
385
386         if (reset)
387                 memset(tfd, 0, sizeof(*tfd));
388
389         num_tbs = iwl_tfd_get_num_tbs(tfd);
390
391         /* Each TFD can point to a maximum 20 Tx buffers */
392         if (num_tbs >= IWL_NUM_OF_TBS) {
393                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
394                           IWL_NUM_OF_TBS);
395                 return -EINVAL;
396         }
397
398         BUG_ON(addr & ~DMA_BIT_MASK(36));
399         if (unlikely(addr & ~IWL_TX_DMA_MASK))
400                 IWL_ERR(priv, "Unaligned address = %llx\n",
401                           (unsigned long long)addr);
402
403         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
404
405         return 0;
406 }
407
408 /*
409  * Tell nic where to find circular buffer of Tx Frame Descriptors for
410  * given Tx queue, and enable the DMA channel used for that queue.
411  *
412  * supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
413  * channels supported in hardware.
414  */
415 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
416                          struct iwl_tx_queue *txq)
417 {
418         int txq_id = txq->q.id;
419
420         /* Circular buffer (TFD queue in DRAM) physical base address */
421         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
422                              txq->q.dma_addr >> 8);
423
424         return 0;
425 }
426
427 static void iwl_bg_beacon_update(struct work_struct *work)
428 {
429         struct iwl_priv *priv =
430                 container_of(work, struct iwl_priv, beacon_update);
431         struct sk_buff *beacon;
432
433         mutex_lock(&priv->mutex);
434         if (!priv->beacon_ctx) {
435                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
436                 goto out;
437         }
438
439         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
440                 /*
441                  * The ucode will send beacon notifications even in
442                  * IBSS mode, but we don't want to process them. But
443                  * we need to defer the type check to here due to
444                  * requiring locking around the beacon_ctx access.
445                  */
446                 goto out;
447         }
448
449         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
450         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
451         if (!beacon) {
452                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
453                 goto out;
454         }
455
456         /* new beacon skb is allocated every time; dispose previous.*/
457         dev_kfree_skb(priv->beacon_skb);
458
459         priv->beacon_skb = beacon;
460
461         iwlagn_send_beacon_cmd(priv);
462  out:
463         mutex_unlock(&priv->mutex);
464 }
465
466 static void iwl_bg_bt_runtime_config(struct work_struct *work)
467 {
468         struct iwl_priv *priv =
469                 container_of(work, struct iwl_priv, bt_runtime_config);
470
471         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
472                 return;
473
474         /* dont send host command if rf-kill is on */
475         if (!iwl_is_ready_rf(priv))
476                 return;
477         priv->cfg->ops->hcmd->send_bt_config(priv);
478 }
479
480 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
481 {
482         struct iwl_priv *priv =
483                 container_of(work, struct iwl_priv, bt_full_concurrency);
484         struct iwl_rxon_context *ctx;
485
486         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
487                 return;
488
489         /* dont send host command if rf-kill is on */
490         if (!iwl_is_ready_rf(priv))
491                 return;
492
493         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
494                        priv->bt_full_concurrent ?
495                        "full concurrency" : "3-wire");
496
497         /*
498          * LQ & RXON updated cmds must be sent before BT Config cmd
499          * to avoid 3-wire collisions
500          */
501         mutex_lock(&priv->mutex);
502         for_each_context(priv, ctx) {
503                 if (priv->cfg->ops->hcmd->set_rxon_chain)
504                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
505                 iwlcore_commit_rxon(priv, ctx);
506         }
507         mutex_unlock(&priv->mutex);
508
509         priv->cfg->ops->hcmd->send_bt_config(priv);
510 }
511
512 /**
513  * iwl_bg_statistics_periodic - Timer callback to queue statistics
514  *
515  * This callback is provided in order to send a statistics request.
516  *
517  * This timer function is continually reset to execute within
518  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
519  * was received.  We need to ensure we receive the statistics in order
520  * to update the temperature used for calibrating the TXPOWER.
521  */
522 static void iwl_bg_statistics_periodic(unsigned long data)
523 {
524         struct iwl_priv *priv = (struct iwl_priv *)data;
525
526         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
527                 return;
528
529         /* dont send host command if rf-kill is on */
530         if (!iwl_is_ready_rf(priv))
531                 return;
532
533         iwl_send_statistics_request(priv, CMD_ASYNC, false);
534 }
535
536
537 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
538                                         u32 start_idx, u32 num_events,
539                                         u32 mode)
540 {
541         u32 i;
542         u32 ptr;        /* SRAM byte address of log data */
543         u32 ev, time, data; /* event log data */
544         unsigned long reg_flags;
545
546         if (mode == 0)
547                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
548         else
549                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
550
551         /* Make sure device is powered up for SRAM reads */
552         spin_lock_irqsave(&priv->reg_lock, reg_flags);
553         if (iwl_grab_nic_access(priv)) {
554                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
555                 return;
556         }
557
558         /* Set starting address; reads will auto-increment */
559         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
560         rmb();
561
562         /*
563          * "time" is actually "data" for mode 0 (no timestamp).
564          * place event id # at far right for easier visual parsing.
565          */
566         for (i = 0; i < num_events; i++) {
567                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
568                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
569                 if (mode == 0) {
570                         trace_iwlwifi_dev_ucode_cont_event(priv,
571                                                         0, time, ev);
572                 } else {
573                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
574                         trace_iwlwifi_dev_ucode_cont_event(priv,
575                                                 time, data, ev);
576                 }
577         }
578         /* Allow device to power down */
579         iwl_release_nic_access(priv);
580         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
581 }
582
583 static void iwl_continuous_event_trace(struct iwl_priv *priv)
584 {
585         u32 capacity;   /* event log capacity in # entries */
586         u32 base;       /* SRAM byte address of event log header */
587         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
588         u32 num_wraps;  /* # times uCode wrapped to top of log */
589         u32 next_entry; /* index of next entry to be written by uCode */
590
591         if (priv->ucode_type == UCODE_INIT)
592                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
593         else
594                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
595         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
596                 capacity = iwl_read_targ_mem(priv, base);
597                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
598                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
599                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
600         } else
601                 return;
602
603         if (num_wraps == priv->event_log.num_wraps) {
604                 iwl_print_cont_event_trace(priv,
605                                        base, priv->event_log.next_entry,
606                                        next_entry - priv->event_log.next_entry,
607                                        mode);
608                 priv->event_log.non_wraps_count++;
609         } else {
610                 if ((num_wraps - priv->event_log.num_wraps) > 1)
611                         priv->event_log.wraps_more_count++;
612                 else
613                         priv->event_log.wraps_once_count++;
614                 trace_iwlwifi_dev_ucode_wrap_event(priv,
615                                 num_wraps - priv->event_log.num_wraps,
616                                 next_entry, priv->event_log.next_entry);
617                 if (next_entry < priv->event_log.next_entry) {
618                         iwl_print_cont_event_trace(priv, base,
619                                priv->event_log.next_entry,
620                                capacity - priv->event_log.next_entry,
621                                mode);
622
623                         iwl_print_cont_event_trace(priv, base, 0,
624                                 next_entry, mode);
625                 } else {
626                         iwl_print_cont_event_trace(priv, base,
627                                next_entry, capacity - next_entry,
628                                mode);
629
630                         iwl_print_cont_event_trace(priv, base, 0,
631                                 next_entry, mode);
632                 }
633         }
634         priv->event_log.num_wraps = num_wraps;
635         priv->event_log.next_entry = next_entry;
636 }
637
638 /**
639  * iwl_bg_ucode_trace - Timer callback to log ucode event
640  *
641  * The timer is continually set to execute every
642  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
643  * this function is to perform continuous uCode event logging operation
644  * if enabled
645  */
646 static void iwl_bg_ucode_trace(unsigned long data)
647 {
648         struct iwl_priv *priv = (struct iwl_priv *)data;
649
650         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
651                 return;
652
653         if (priv->event_log.ucode_trace) {
654                 iwl_continuous_event_trace(priv);
655                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
656                 mod_timer(&priv->ucode_trace,
657                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
658         }
659 }
660
661 static void iwl_bg_tx_flush(struct work_struct *work)
662 {
663         struct iwl_priv *priv =
664                 container_of(work, struct iwl_priv, tx_flush);
665
666         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
667                 return;
668
669         /* do nothing if rf-kill is on */
670         if (!iwl_is_ready_rf(priv))
671                 return;
672
673         if (priv->cfg->ops->lib->txfifo_flush) {
674                 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
675                 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
676         }
677 }
678
679 /**
680  * iwl_rx_handle - Main entry function for receiving responses from uCode
681  *
682  * Uses the priv->rx_handlers callback function array to invoke
683  * the appropriate handlers, including command responses,
684  * frame-received notifications, and other notifications.
685  */
686 static void iwl_rx_handle(struct iwl_priv *priv)
687 {
688         struct iwl_rx_mem_buffer *rxb;
689         struct iwl_rx_packet *pkt;
690         struct iwl_rx_queue *rxq = &priv->rxq;
691         u32 r, i;
692         int reclaim;
693         unsigned long flags;
694         u8 fill_rx = 0;
695         u32 count = 8;
696         int total_empty;
697
698         /* uCode's read index (stored in shared DRAM) indicates the last Rx
699          * buffer that the driver may process (last buffer filled by ucode). */
700         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
701         i = rxq->read;
702
703         /* Rx interrupt, but nothing sent from uCode */
704         if (i == r)
705                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
706
707         /* calculate total frames need to be restock after handling RX */
708         total_empty = r - rxq->write_actual;
709         if (total_empty < 0)
710                 total_empty += RX_QUEUE_SIZE;
711
712         if (total_empty > (RX_QUEUE_SIZE / 2))
713                 fill_rx = 1;
714
715         while (i != r) {
716                 int len;
717
718                 rxb = rxq->queue[i];
719
720                 /* If an RXB doesn't have a Rx queue slot associated with it,
721                  * then a bug has been introduced in the queue refilling
722                  * routines -- catch it here */
723                 BUG_ON(rxb == NULL);
724
725                 rxq->queue[i] = NULL;
726
727                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
728                                PAGE_SIZE << priv->hw_params.rx_page_order,
729                                PCI_DMA_FROMDEVICE);
730                 pkt = rxb_addr(rxb);
731
732                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
733                 len += sizeof(u32); /* account for status word */
734                 trace_iwlwifi_dev_rx(priv, pkt, len);
735
736                 /* Reclaim a command buffer only if this packet is a response
737                  *   to a (driver-originated) command.
738                  * If the packet (e.g. Rx frame) originated from uCode,
739                  *   there is no command buffer to reclaim.
740                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
741                  *   but apparently a few don't get set; catch them here. */
742                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
743                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
744                         (pkt->hdr.cmd != REPLY_RX) &&
745                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
746                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
747                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
748                         (pkt->hdr.cmd != REPLY_TX);
749
750                 /*
751                  * Do the notification wait before RX handlers so
752                  * even if the RX handler consumes the RXB we have
753                  * access to it in the notification wait entry.
754                  */
755                 if (!list_empty(&priv->_agn.notif_waits)) {
756                         struct iwl_notification_wait *w;
757
758                         spin_lock(&priv->_agn.notif_wait_lock);
759                         list_for_each_entry(w, &priv->_agn.notif_waits, list) {
760                                 if (w->cmd == pkt->hdr.cmd) {
761                                         w->triggered = true;
762                                         if (w->fn)
763                                                 w->fn(priv, pkt);
764                                 }
765                         }
766                         spin_unlock(&priv->_agn.notif_wait_lock);
767
768                         wake_up_all(&priv->_agn.notif_waitq);
769                 }
770
771                 /* Based on type of command response or notification,
772                  *   handle those that need handling via function in
773                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
774                 if (priv->rx_handlers[pkt->hdr.cmd]) {
775                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
776                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
777                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
778                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
779                 } else {
780                         /* No handling needed */
781                         IWL_DEBUG_RX(priv,
782                                 "r %d i %d No handler needed for %s, 0x%02x\n",
783                                 r, i, get_cmd_string(pkt->hdr.cmd),
784                                 pkt->hdr.cmd);
785                 }
786
787                 /*
788                  * XXX: After here, we should always check rxb->page
789                  * against NULL before touching it or its virtual
790                  * memory (pkt). Because some rx_handler might have
791                  * already taken or freed the pages.
792                  */
793
794                 if (reclaim) {
795                         /* Invoke any callbacks, transfer the buffer to caller,
796                          * and fire off the (possibly) blocking iwl_send_cmd()
797                          * as we reclaim the driver command queue */
798                         if (rxb->page)
799                                 iwl_tx_cmd_complete(priv, rxb);
800                         else
801                                 IWL_WARN(priv, "Claim null rxb?\n");
802                 }
803
804                 /* Reuse the page if possible. For notification packets and
805                  * SKBs that fail to Rx correctly, add them back into the
806                  * rx_free list for reuse later. */
807                 spin_lock_irqsave(&rxq->lock, flags);
808                 if (rxb->page != NULL) {
809                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
810                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
811                                 PCI_DMA_FROMDEVICE);
812                         list_add_tail(&rxb->list, &rxq->rx_free);
813                         rxq->free_count++;
814                 } else
815                         list_add_tail(&rxb->list, &rxq->rx_used);
816
817                 spin_unlock_irqrestore(&rxq->lock, flags);
818
819                 i = (i + 1) & RX_QUEUE_MASK;
820                 /* If there are a lot of unused frames,
821                  * restock the Rx queue so ucode wont assert. */
822                 if (fill_rx) {
823                         count++;
824                         if (count >= 8) {
825                                 rxq->read = i;
826                                 iwlagn_rx_replenish_now(priv);
827                                 count = 0;
828                         }
829                 }
830         }
831
832         /* Backtrack one entry */
833         rxq->read = i;
834         if (fill_rx)
835                 iwlagn_rx_replenish_now(priv);
836         else
837                 iwlagn_rx_queue_restock(priv);
838 }
839
840 /* call this function to flush any scheduled tasklet */
841 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
842 {
843         /* wait to make sure we flush pending tasklet*/
844         synchronize_irq(priv->pci_dev->irq);
845         tasklet_kill(&priv->irq_tasklet);
846 }
847
848 /* tasklet for iwlagn interrupt */
849 static void iwl_irq_tasklet(struct iwl_priv *priv)
850 {
851         u32 inta = 0;
852         u32 handled = 0;
853         unsigned long flags;
854         u32 i;
855 #ifdef CONFIG_IWLWIFI_DEBUG
856         u32 inta_mask;
857 #endif
858
859         spin_lock_irqsave(&priv->lock, flags);
860
861         /* Ack/clear/reset pending uCode interrupts.
862          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
863          */
864         /* There is a hardware bug in the interrupt mask function that some
865          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
866          * they are disabled in the CSR_INT_MASK register. Furthermore the
867          * ICT interrupt handling mechanism has another bug that might cause
868          * these unmasked interrupts fail to be detected. We workaround the
869          * hardware bugs here by ACKing all the possible interrupts so that
870          * interrupt coalescing can still be achieved.
871          */
872         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
873
874         inta = priv->_agn.inta;
875
876 #ifdef CONFIG_IWLWIFI_DEBUG
877         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
878                 /* just for debug */
879                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
880                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
881                                 inta, inta_mask);
882         }
883 #endif
884
885         spin_unlock_irqrestore(&priv->lock, flags);
886
887         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
888         priv->_agn.inta = 0;
889
890         /* Now service all interrupt bits discovered above. */
891         if (inta & CSR_INT_BIT_HW_ERR) {
892                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
893
894                 /* Tell the device to stop sending interrupts */
895                 iwl_disable_interrupts(priv);
896
897                 priv->isr_stats.hw++;
898                 iwl_irq_handle_error(priv);
899
900                 handled |= CSR_INT_BIT_HW_ERR;
901
902                 return;
903         }
904
905 #ifdef CONFIG_IWLWIFI_DEBUG
906         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
907                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
908                 if (inta & CSR_INT_BIT_SCD) {
909                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
910                                       "the frame/frames.\n");
911                         priv->isr_stats.sch++;
912                 }
913
914                 /* Alive notification via Rx interrupt will do the real work */
915                 if (inta & CSR_INT_BIT_ALIVE) {
916                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
917                         priv->isr_stats.alive++;
918                 }
919         }
920 #endif
921         /* Safely ignore these bits for debug checks below */
922         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
923
924         /* HW RF KILL switch toggled */
925         if (inta & CSR_INT_BIT_RF_KILL) {
926                 int hw_rf_kill = 0;
927                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
928                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
929                         hw_rf_kill = 1;
930
931                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
932                                 hw_rf_kill ? "disable radio" : "enable radio");
933
934                 priv->isr_stats.rfkill++;
935
936                 /* driver only loads ucode once setting the interface up.
937                  * the driver allows loading the ucode even if the radio
938                  * is killed. Hence update the killswitch state here. The
939                  * rfkill handler will care about restarting if needed.
940                  */
941                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
942                         if (hw_rf_kill)
943                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
944                         else
945                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
946                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
947                 }
948
949                 handled |= CSR_INT_BIT_RF_KILL;
950         }
951
952         /* Chip got too hot and stopped itself */
953         if (inta & CSR_INT_BIT_CT_KILL) {
954                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
955                 priv->isr_stats.ctkill++;
956                 handled |= CSR_INT_BIT_CT_KILL;
957         }
958
959         /* Error detected by uCode */
960         if (inta & CSR_INT_BIT_SW_ERR) {
961                 IWL_ERR(priv, "Microcode SW error detected. "
962                         " Restarting 0x%X.\n", inta);
963                 priv->isr_stats.sw++;
964                 iwl_irq_handle_error(priv);
965                 handled |= CSR_INT_BIT_SW_ERR;
966         }
967
968         /* uCode wakes up after power-down sleep */
969         if (inta & CSR_INT_BIT_WAKEUP) {
970                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
971                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
972                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
973                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
974
975                 priv->isr_stats.wakeup++;
976
977                 handled |= CSR_INT_BIT_WAKEUP;
978         }
979
980         /* All uCode command responses, including Tx command responses,
981          * Rx "responses" (frame-received notification), and other
982          * notifications from uCode come through here*/
983         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
984                         CSR_INT_BIT_RX_PERIODIC)) {
985                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
986                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
987                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
988                         iwl_write32(priv, CSR_FH_INT_STATUS,
989                                         CSR_FH_INT_RX_MASK);
990                 }
991                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
992                         handled |= CSR_INT_BIT_RX_PERIODIC;
993                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
994                 }
995                 /* Sending RX interrupt require many steps to be done in the
996                  * the device:
997                  * 1- write interrupt to current index in ICT table.
998                  * 2- dma RX frame.
999                  * 3- update RX shared data to indicate last write index.
1000                  * 4- send interrupt.
1001                  * This could lead to RX race, driver could receive RX interrupt
1002                  * but the shared data changes does not reflect this;
1003                  * periodic interrupt will detect any dangling Rx activity.
1004                  */
1005
1006                 /* Disable periodic interrupt; we use it as just a one-shot. */
1007                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1008                             CSR_INT_PERIODIC_DIS);
1009                 iwl_rx_handle(priv);
1010
1011                 /*
1012                  * Enable periodic interrupt in 8 msec only if we received
1013                  * real RX interrupt (instead of just periodic int), to catch
1014                  * any dangling Rx interrupt.  If it was just the periodic
1015                  * interrupt, there was no dangling Rx activity, and no need
1016                  * to extend the periodic interrupt; one-shot is enough.
1017                  */
1018                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1019                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1020                                     CSR_INT_PERIODIC_ENA);
1021
1022                 priv->isr_stats.rx++;
1023         }
1024
1025         /* This "Tx" DMA channel is used only for loading uCode */
1026         if (inta & CSR_INT_BIT_FH_TX) {
1027                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
1028                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1029                 priv->isr_stats.tx++;
1030                 handled |= CSR_INT_BIT_FH_TX;
1031                 /* Wake up uCode load routine, now that load is complete */
1032                 priv->ucode_write_complete = 1;
1033                 wake_up_interruptible(&priv->wait_command_queue);
1034         }
1035
1036         if (inta & ~handled) {
1037                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1038                 priv->isr_stats.unhandled++;
1039         }
1040
1041         if (inta & ~(priv->inta_mask)) {
1042                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1043                          inta & ~priv->inta_mask);
1044         }
1045
1046         /* Re-enable all interrupts */
1047         /* only Re-enable if disabled by irq */
1048         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1049                 iwl_enable_interrupts(priv);
1050         /* Re-enable RF_KILL if it occurred */
1051         else if (handled & CSR_INT_BIT_RF_KILL)
1052                 iwl_enable_rfkill_int(priv);
1053 }
1054
1055 /*****************************************************************************
1056  *
1057  * sysfs attributes
1058  *
1059  *****************************************************************************/
1060
1061 #ifdef CONFIG_IWLWIFI_DEBUG
1062
1063 /*
1064  * The following adds a new attribute to the sysfs representation
1065  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
1066  * used for controlling the debug level.
1067  *
1068  * See the level definitions in iwl for details.
1069  *
1070  * The debug_level being managed using sysfs below is a per device debug
1071  * level that is used instead of the global debug level if it (the per
1072  * device debug level) is set.
1073  */
1074 static ssize_t show_debug_level(struct device *d,
1075                                 struct device_attribute *attr, char *buf)
1076 {
1077         struct iwl_priv *priv = dev_get_drvdata(d);
1078         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
1079 }
1080 static ssize_t store_debug_level(struct device *d,
1081                                 struct device_attribute *attr,
1082                                  const char *buf, size_t count)
1083 {
1084         struct iwl_priv *priv = dev_get_drvdata(d);
1085         unsigned long val;
1086         int ret;
1087
1088         ret = strict_strtoul(buf, 0, &val);
1089         if (ret)
1090                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
1091         else {
1092                 priv->debug_level = val;
1093                 if (iwl_alloc_traffic_mem(priv))
1094                         IWL_ERR(priv,
1095                                 "Not enough memory to generate traffic log\n");
1096         }
1097         return strnlen(buf, count);
1098 }
1099
1100 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
1101                         show_debug_level, store_debug_level);
1102
1103
1104 #endif /* CONFIG_IWLWIFI_DEBUG */
1105
1106
1107 static ssize_t show_temperature(struct device *d,
1108                                 struct device_attribute *attr, char *buf)
1109 {
1110         struct iwl_priv *priv = dev_get_drvdata(d);
1111
1112         if (!iwl_is_alive(priv))
1113                 return -EAGAIN;
1114
1115         return sprintf(buf, "%d\n", priv->temperature);
1116 }
1117
1118 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
1119
1120 static ssize_t show_tx_power(struct device *d,
1121                              struct device_attribute *attr, char *buf)
1122 {
1123         struct iwl_priv *priv = dev_get_drvdata(d);
1124
1125         if (!iwl_is_ready_rf(priv))
1126                 return sprintf(buf, "off\n");
1127         else
1128                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
1129 }
1130
1131 static ssize_t store_tx_power(struct device *d,
1132                               struct device_attribute *attr,
1133                               const char *buf, size_t count)
1134 {
1135         struct iwl_priv *priv = dev_get_drvdata(d);
1136         unsigned long val;
1137         int ret;
1138
1139         ret = strict_strtoul(buf, 10, &val);
1140         if (ret)
1141                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
1142         else {
1143                 ret = iwl_set_tx_power(priv, val, false);
1144                 if (ret)
1145                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
1146                                 ret);
1147                 else
1148                         ret = count;
1149         }
1150         return ret;
1151 }
1152
1153 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
1154
1155 static struct attribute *iwl_sysfs_entries[] = {
1156         &dev_attr_temperature.attr,
1157         &dev_attr_tx_power.attr,
1158 #ifdef CONFIG_IWLWIFI_DEBUG
1159         &dev_attr_debug_level.attr,
1160 #endif
1161         NULL
1162 };
1163
1164 static struct attribute_group iwl_attribute_group = {
1165         .name = NULL,           /* put in device directory */
1166         .attrs = iwl_sysfs_entries,
1167 };
1168
1169 /******************************************************************************
1170  *
1171  * uCode download functions
1172  *
1173  ******************************************************************************/
1174
1175 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1176 {
1177         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1178         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1179         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1180         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1181         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1182         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1183 }
1184
1185 static void iwl_nic_start(struct iwl_priv *priv)
1186 {
1187         /* Remove all resets to allow NIC to operate */
1188         iwl_write32(priv, CSR_RESET, 0);
1189 }
1190
1191 struct iwlagn_ucode_capabilities {
1192         u32 max_probe_length;
1193         u32 standard_phy_calibration_size;
1194         bool pan;
1195 };
1196
1197 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1198 static int iwl_mac_setup_register(struct iwl_priv *priv,
1199                                   struct iwlagn_ucode_capabilities *capa);
1200
1201 #define UCODE_EXPERIMENTAL_INDEX        100
1202 #define UCODE_EXPERIMENTAL_TAG          "exp"
1203
1204 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1205 {
1206         const char *name_pre = priv->cfg->fw_name_pre;
1207         char tag[8];
1208
1209         if (first) {
1210 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1211                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1212                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1213         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1214 #endif
1215                 priv->fw_index = priv->cfg->ucode_api_max;
1216                 sprintf(tag, "%d", priv->fw_index);
1217         } else {
1218                 priv->fw_index--;
1219                 sprintf(tag, "%d", priv->fw_index);
1220         }
1221
1222         if (priv->fw_index < priv->cfg->ucode_api_min) {
1223                 IWL_ERR(priv, "no suitable firmware found!\n");
1224                 return -ENOENT;
1225         }
1226
1227         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1228
1229         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1230                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1231                                 ? "EXPERIMENTAL " : "",
1232                        priv->firmware_name);
1233
1234         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1235                                        &priv->pci_dev->dev, GFP_KERNEL, priv,
1236                                        iwl_ucode_callback);
1237 }
1238
1239 struct iwlagn_firmware_pieces {
1240         const void *inst, *data, *init, *init_data, *boot;
1241         size_t inst_size, data_size, init_size, init_data_size, boot_size;
1242
1243         u32 build;
1244
1245         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1246         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1247 };
1248
1249 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1250                                        const struct firmware *ucode_raw,
1251                                        struct iwlagn_firmware_pieces *pieces)
1252 {
1253         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1254         u32 api_ver, hdr_size;
1255         const u8 *src;
1256
1257         priv->ucode_ver = le32_to_cpu(ucode->ver);
1258         api_ver = IWL_UCODE_API(priv->ucode_ver);
1259
1260         switch (api_ver) {
1261         default:
1262                 hdr_size = 28;
1263                 if (ucode_raw->size < hdr_size) {
1264                         IWL_ERR(priv, "File size too small!\n");
1265                         return -EINVAL;
1266                 }
1267                 pieces->build = le32_to_cpu(ucode->u.v2.build);
1268                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1269                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1270                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1271                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1272                 pieces->boot_size = le32_to_cpu(ucode->u.v2.boot_size);
1273                 src = ucode->u.v2.data;
1274                 break;
1275         case 0:
1276         case 1:
1277         case 2:
1278                 hdr_size = 24;
1279                 if (ucode_raw->size < hdr_size) {
1280                         IWL_ERR(priv, "File size too small!\n");
1281                         return -EINVAL;
1282                 }
1283                 pieces->build = 0;
1284                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1285                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1286                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1287                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1288                 pieces->boot_size = le32_to_cpu(ucode->u.v1.boot_size);
1289                 src = ucode->u.v1.data;
1290                 break;
1291         }
1292
1293         /* Verify size of file vs. image size info in file's header */
1294         if (ucode_raw->size != hdr_size + pieces->inst_size +
1295                                 pieces->data_size + pieces->init_size +
1296                                 pieces->init_data_size + pieces->boot_size) {
1297
1298                 IWL_ERR(priv,
1299                         "uCode file size %d does not match expected size\n",
1300                         (int)ucode_raw->size);
1301                 return -EINVAL;
1302         }
1303
1304         pieces->inst = src;
1305         src += pieces->inst_size;
1306         pieces->data = src;
1307         src += pieces->data_size;
1308         pieces->init = src;
1309         src += pieces->init_size;
1310         pieces->init_data = src;
1311         src += pieces->init_data_size;
1312         pieces->boot = src;
1313         src += pieces->boot_size;
1314
1315         return 0;
1316 }
1317
1318 static int iwlagn_wanted_ucode_alternative = 1;
1319
1320 static int iwlagn_load_firmware(struct iwl_priv *priv,
1321                                 const struct firmware *ucode_raw,
1322                                 struct iwlagn_firmware_pieces *pieces,
1323                                 struct iwlagn_ucode_capabilities *capa)
1324 {
1325         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1326         struct iwl_ucode_tlv *tlv;
1327         size_t len = ucode_raw->size;
1328         const u8 *data;
1329         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1330         u64 alternatives;
1331         u32 tlv_len;
1332         enum iwl_ucode_tlv_type tlv_type;
1333         const u8 *tlv_data;
1334
1335         if (len < sizeof(*ucode)) {
1336                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1337                 return -EINVAL;
1338         }
1339
1340         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1341                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1342                         le32_to_cpu(ucode->magic));
1343                 return -EINVAL;
1344         }
1345
1346         /*
1347          * Check which alternatives are present, and "downgrade"
1348          * when the chosen alternative is not present, warning
1349          * the user when that happens. Some files may not have
1350          * any alternatives, so don't warn in that case.
1351          */
1352         alternatives = le64_to_cpu(ucode->alternatives);
1353         tmp = wanted_alternative;
1354         if (wanted_alternative > 63)
1355                 wanted_alternative = 63;
1356         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1357                 wanted_alternative--;
1358         if (wanted_alternative && wanted_alternative != tmp)
1359                 IWL_WARN(priv,
1360                          "uCode alternative %d not available, choosing %d\n",
1361                          tmp, wanted_alternative);
1362
1363         priv->ucode_ver = le32_to_cpu(ucode->ver);
1364         pieces->build = le32_to_cpu(ucode->build);
1365         data = ucode->data;
1366
1367         len -= sizeof(*ucode);
1368
1369         while (len >= sizeof(*tlv)) {
1370                 u16 tlv_alt;
1371
1372                 len -= sizeof(*tlv);
1373                 tlv = (void *)data;
1374
1375                 tlv_len = le32_to_cpu(tlv->length);
1376                 tlv_type = le16_to_cpu(tlv->type);
1377                 tlv_alt = le16_to_cpu(tlv->alternative);
1378                 tlv_data = tlv->data;
1379
1380                 if (len < tlv_len) {
1381                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1382                                 len, tlv_len);
1383                         return -EINVAL;
1384                 }
1385                 len -= ALIGN(tlv_len, 4);
1386                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1387
1388                 /*
1389                  * Alternative 0 is always valid.
1390                  *
1391                  * Skip alternative TLVs that are not selected.
1392                  */
1393                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1394                         continue;
1395
1396                 switch (tlv_type) {
1397                 case IWL_UCODE_TLV_INST:
1398                         pieces->inst = tlv_data;
1399                         pieces->inst_size = tlv_len;
1400                         break;
1401                 case IWL_UCODE_TLV_DATA:
1402                         pieces->data = tlv_data;
1403                         pieces->data_size = tlv_len;
1404                         break;
1405                 case IWL_UCODE_TLV_INIT:
1406                         pieces->init = tlv_data;
1407                         pieces->init_size = tlv_len;
1408                         break;
1409                 case IWL_UCODE_TLV_INIT_DATA:
1410                         pieces->init_data = tlv_data;
1411                         pieces->init_data_size = tlv_len;
1412                         break;
1413                 case IWL_UCODE_TLV_BOOT:
1414                         pieces->boot = tlv_data;
1415                         pieces->boot_size = tlv_len;
1416                         break;
1417                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1418                         if (tlv_len != sizeof(u32))
1419                                 goto invalid_tlv_len;
1420                         capa->max_probe_length =
1421                                         le32_to_cpup((__le32 *)tlv_data);
1422                         break;
1423                 case IWL_UCODE_TLV_PAN:
1424                         if (tlv_len)
1425                                 goto invalid_tlv_len;
1426                         capa->pan = true;
1427                         break;
1428                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1429                         if (tlv_len != sizeof(u32))
1430                                 goto invalid_tlv_len;
1431                         pieces->init_evtlog_ptr =
1432                                         le32_to_cpup((__le32 *)tlv_data);
1433                         break;
1434                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1435                         if (tlv_len != sizeof(u32))
1436                                 goto invalid_tlv_len;
1437                         pieces->init_evtlog_size =
1438                                         le32_to_cpup((__le32 *)tlv_data);
1439                         break;
1440                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1441                         if (tlv_len != sizeof(u32))
1442                                 goto invalid_tlv_len;
1443                         pieces->init_errlog_ptr =
1444                                         le32_to_cpup((__le32 *)tlv_data);
1445                         break;
1446                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1447                         if (tlv_len != sizeof(u32))
1448                                 goto invalid_tlv_len;
1449                         pieces->inst_evtlog_ptr =
1450                                         le32_to_cpup((__le32 *)tlv_data);
1451                         break;
1452                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1453                         if (tlv_len != sizeof(u32))
1454                                 goto invalid_tlv_len;
1455                         pieces->inst_evtlog_size =
1456                                         le32_to_cpup((__le32 *)tlv_data);
1457                         break;
1458                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1459                         if (tlv_len != sizeof(u32))
1460                                 goto invalid_tlv_len;
1461                         pieces->inst_errlog_ptr =
1462                                         le32_to_cpup((__le32 *)tlv_data);
1463                         break;
1464                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1465                         if (tlv_len)
1466                                 goto invalid_tlv_len;
1467                         priv->enhance_sensitivity_table = true;
1468                         break;
1469                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1470                         if (tlv_len != sizeof(u32))
1471                                 goto invalid_tlv_len;
1472                         capa->standard_phy_calibration_size =
1473                                         le32_to_cpup((__le32 *)tlv_data);
1474                         break;
1475                 default:
1476                         IWL_WARN(priv, "unknown TLV: %d\n", tlv_type);
1477                         break;
1478                 }
1479         }
1480
1481         if (len) {
1482                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1483                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1484                 return -EINVAL;
1485         }
1486
1487         return 0;
1488
1489  invalid_tlv_len:
1490         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1491         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1492
1493         return -EINVAL;
1494 }
1495
1496 /**
1497  * iwl_ucode_callback - callback when firmware was loaded
1498  *
1499  * If loaded successfully, copies the firmware into buffers
1500  * for the card to fetch (via DMA).
1501  */
1502 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1503 {
1504         struct iwl_priv *priv = context;
1505         struct iwl_ucode_header *ucode;
1506         int err;
1507         struct iwlagn_firmware_pieces pieces;
1508         const unsigned int api_max = priv->cfg->ucode_api_max;
1509         const unsigned int api_min = priv->cfg->ucode_api_min;
1510         u32 api_ver;
1511         char buildstr[25];
1512         u32 build;
1513         struct iwlagn_ucode_capabilities ucode_capa = {
1514                 .max_probe_length = 200,
1515                 .standard_phy_calibration_size =
1516                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1517         };
1518
1519         memset(&pieces, 0, sizeof(pieces));
1520
1521         if (!ucode_raw) {
1522                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1523                         IWL_ERR(priv,
1524                                 "request for firmware file '%s' failed.\n",
1525                                 priv->firmware_name);
1526                 goto try_again;
1527         }
1528
1529         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1530                        priv->firmware_name, ucode_raw->size);
1531
1532         /* Make sure that we got at least the API version number */
1533         if (ucode_raw->size < 4) {
1534                 IWL_ERR(priv, "File size way too small!\n");
1535                 goto try_again;
1536         }
1537
1538         /* Data from ucode file:  header followed by uCode images */
1539         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1540
1541         if (ucode->ver)
1542                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1543         else
1544                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1545                                            &ucode_capa);
1546
1547         if (err)
1548                 goto try_again;
1549
1550         api_ver = IWL_UCODE_API(priv->ucode_ver);
1551         build = pieces.build;
1552
1553         /*
1554          * api_ver should match the api version forming part of the
1555          * firmware filename ... but we don't check for that and only rely
1556          * on the API version read from firmware header from here on forward
1557          */
1558         /* no api version check required for experimental uCode */
1559         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1560                 if (api_ver < api_min || api_ver > api_max) {
1561                         IWL_ERR(priv,
1562                                 "Driver unable to support your firmware API. "
1563                                 "Driver supports v%u, firmware is v%u.\n",
1564                                 api_max, api_ver);
1565                         goto try_again;
1566                 }
1567
1568                 if (api_ver != api_max)
1569                         IWL_ERR(priv,
1570                                 "Firmware has old API version. Expected v%u, "
1571                                 "got v%u. New firmware can be obtained "
1572                                 "from http://www.intellinuxwireless.org.\n",
1573                                 api_max, api_ver);
1574         }
1575
1576         if (build)
1577                 sprintf(buildstr, " build %u%s", build,
1578                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1579                                 ? " (EXP)" : "");
1580         else
1581                 buildstr[0] = '\0';
1582
1583         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1584                  IWL_UCODE_MAJOR(priv->ucode_ver),
1585                  IWL_UCODE_MINOR(priv->ucode_ver),
1586                  IWL_UCODE_API(priv->ucode_ver),
1587                  IWL_UCODE_SERIAL(priv->ucode_ver),
1588                  buildstr);
1589
1590         snprintf(priv->hw->wiphy->fw_version,
1591                  sizeof(priv->hw->wiphy->fw_version),
1592                  "%u.%u.%u.%u%s",
1593                  IWL_UCODE_MAJOR(priv->ucode_ver),
1594                  IWL_UCODE_MINOR(priv->ucode_ver),
1595                  IWL_UCODE_API(priv->ucode_ver),
1596                  IWL_UCODE_SERIAL(priv->ucode_ver),
1597                  buildstr);
1598
1599         /*
1600          * For any of the failures below (before allocating pci memory)
1601          * we will try to load a version with a smaller API -- maybe the
1602          * user just got a corrupted version of the latest API.
1603          */
1604
1605         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1606                        priv->ucode_ver);
1607         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1608                        pieces.inst_size);
1609         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1610                        pieces.data_size);
1611         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1612                        pieces.init_size);
1613         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1614                        pieces.init_data_size);
1615         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %Zd\n",
1616                        pieces.boot_size);
1617
1618         /* Verify that uCode images will fit in card's SRAM */
1619         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1620                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1621                         pieces.inst_size);
1622                 goto try_again;
1623         }
1624
1625         if (pieces.data_size > priv->hw_params.max_data_size) {
1626                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1627                         pieces.data_size);
1628                 goto try_again;
1629         }
1630
1631         if (pieces.init_size > priv->hw_params.max_inst_size) {
1632                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1633                         pieces.init_size);
1634                 goto try_again;
1635         }
1636
1637         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1638                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1639                         pieces.init_data_size);
1640                 goto try_again;
1641         }
1642
1643         if (pieces.boot_size > priv->hw_params.max_bsm_size) {
1644                 IWL_ERR(priv, "uCode boot instr len %Zd too large to fit in\n",
1645                         pieces.boot_size);
1646                 goto try_again;
1647         }
1648
1649         /* Allocate ucode buffers for card's bus-master loading ... */
1650
1651         /* Runtime instructions and 2 copies of data:
1652          * 1) unmodified from disk
1653          * 2) backup cache for save/restore during power-downs */
1654         priv->ucode_code.len = pieces.inst_size;
1655         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1656
1657         priv->ucode_data.len = pieces.data_size;
1658         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1659
1660         priv->ucode_data_backup.len = pieces.data_size;
1661         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1662
1663         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1664             !priv->ucode_data_backup.v_addr)
1665                 goto err_pci_alloc;
1666
1667         /* Initialization instructions and data */
1668         if (pieces.init_size && pieces.init_data_size) {
1669                 priv->ucode_init.len = pieces.init_size;
1670                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1671
1672                 priv->ucode_init_data.len = pieces.init_data_size;
1673                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1674
1675                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1676                         goto err_pci_alloc;
1677         }
1678
1679         /* Bootstrap (instructions only, no data) */
1680         if (pieces.boot_size) {
1681                 priv->ucode_boot.len = pieces.boot_size;
1682                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1683
1684                 if (!priv->ucode_boot.v_addr)
1685                         goto err_pci_alloc;
1686         }
1687
1688         /* Now that we can no longer fail, copy information */
1689
1690         /*
1691          * The (size - 16) / 12 formula is based on the information recorded
1692          * for each event, which is of mode 1 (including timestamp) for all
1693          * new microcodes that include this information.
1694          */
1695         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1696         if (pieces.init_evtlog_size)
1697                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1698         else
1699                 priv->_agn.init_evtlog_size =
1700                         priv->cfg->base_params->max_event_log_size;
1701         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1702         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1703         if (pieces.inst_evtlog_size)
1704                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1705         else
1706                 priv->_agn.inst_evtlog_size =
1707                         priv->cfg->base_params->max_event_log_size;
1708         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1709
1710         if (ucode_capa.pan) {
1711                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1712                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1713         } else
1714                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1715
1716         /* Copy images into buffers for card's bus-master reads ... */
1717
1718         /* Runtime instructions (first block of data in file) */
1719         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n",
1720                         pieces.inst_size);
1721         memcpy(priv->ucode_code.v_addr, pieces.inst, pieces.inst_size);
1722
1723         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1724                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1725
1726         /*
1727          * Runtime data
1728          * NOTE:  Copy into backup buffer will be done in iwl_up()
1729          */
1730         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n",
1731                         pieces.data_size);
1732         memcpy(priv->ucode_data.v_addr, pieces.data, pieces.data_size);
1733         memcpy(priv->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
1734
1735         /* Initialization instructions */
1736         if (pieces.init_size) {
1737                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1738                                 pieces.init_size);
1739                 memcpy(priv->ucode_init.v_addr, pieces.init, pieces.init_size);
1740         }
1741
1742         /* Initialization data */
1743         if (pieces.init_data_size) {
1744                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1745                                pieces.init_data_size);
1746                 memcpy(priv->ucode_init_data.v_addr, pieces.init_data,
1747                        pieces.init_data_size);
1748         }
1749
1750         /* Bootstrap instructions */
1751         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n",
1752                         pieces.boot_size);
1753         memcpy(priv->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
1754
1755         /*
1756          * figure out the offset of chain noise reset and gain commands
1757          * base on the size of standard phy calibration commands table size
1758          */
1759         if (ucode_capa.standard_phy_calibration_size >
1760             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1761                 ucode_capa.standard_phy_calibration_size =
1762                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1763
1764         priv->_agn.phy_calib_chain_noise_reset_cmd =
1765                 ucode_capa.standard_phy_calibration_size;
1766         priv->_agn.phy_calib_chain_noise_gain_cmd =
1767                 ucode_capa.standard_phy_calibration_size + 1;
1768
1769         /**************************************************
1770          * This is still part of probe() in a sense...
1771          *
1772          * 9. Setup and register with mac80211 and debugfs
1773          **************************************************/
1774         err = iwl_mac_setup_register(priv, &ucode_capa);
1775         if (err)
1776                 goto out_unbind;
1777
1778         err = iwl_dbgfs_register(priv, DRV_NAME);
1779         if (err)
1780                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1781
1782         err = sysfs_create_group(&priv->pci_dev->dev.kobj,
1783                                         &iwl_attribute_group);
1784         if (err) {
1785                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1786                 goto out_unbind;
1787         }
1788
1789         /* We have our copies now, allow OS release its copies */
1790         release_firmware(ucode_raw);
1791         complete(&priv->_agn.firmware_loading_complete);
1792         return;
1793
1794  try_again:
1795         /* try next, if any */
1796         if (iwl_request_firmware(priv, false))
1797                 goto out_unbind;
1798         release_firmware(ucode_raw);
1799         return;
1800
1801  err_pci_alloc:
1802         IWL_ERR(priv, "failed to allocate pci memory\n");
1803         iwl_dealloc_ucode_pci(priv);
1804  out_unbind:
1805         complete(&priv->_agn.firmware_loading_complete);
1806         device_release_driver(&priv->pci_dev->dev);
1807         release_firmware(ucode_raw);
1808 }
1809
1810 static const char *desc_lookup_text[] = {
1811         "OK",
1812         "FAIL",
1813         "BAD_PARAM",
1814         "BAD_CHECKSUM",
1815         "NMI_INTERRUPT_WDG",
1816         "SYSASSERT",
1817         "FATAL_ERROR",
1818         "BAD_COMMAND",
1819         "HW_ERROR_TUNE_LOCK",
1820         "HW_ERROR_TEMPERATURE",
1821         "ILLEGAL_CHAN_FREQ",
1822         "VCC_NOT_STABLE",
1823         "FH_ERROR",
1824         "NMI_INTERRUPT_HOST",
1825         "NMI_INTERRUPT_ACTION_PT",
1826         "NMI_INTERRUPT_UNKNOWN",
1827         "UCODE_VERSION_MISMATCH",
1828         "HW_ERROR_ABS_LOCK",
1829         "HW_ERROR_CAL_LOCK_FAIL",
1830         "NMI_INTERRUPT_INST_ACTION_PT",
1831         "NMI_INTERRUPT_DATA_ACTION_PT",
1832         "NMI_TRM_HW_ER",
1833         "NMI_INTERRUPT_TRM",
1834         "NMI_INTERRUPT_BREAK_POINT"
1835         "DEBUG_0",
1836         "DEBUG_1",
1837         "DEBUG_2",
1838         "DEBUG_3",
1839 };
1840
1841 static struct { char *name; u8 num; } advanced_lookup[] = {
1842         { "NMI_INTERRUPT_WDG", 0x34 },
1843         { "SYSASSERT", 0x35 },
1844         { "UCODE_VERSION_MISMATCH", 0x37 },
1845         { "BAD_COMMAND", 0x38 },
1846         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1847         { "FATAL_ERROR", 0x3D },
1848         { "NMI_TRM_HW_ERR", 0x46 },
1849         { "NMI_INTERRUPT_TRM", 0x4C },
1850         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1851         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1852         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1853         { "NMI_INTERRUPT_HOST", 0x66 },
1854         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1855         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1856         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1857         { "ADVANCED_SYSASSERT", 0 },
1858 };
1859
1860 static const char *desc_lookup(u32 num)
1861 {
1862         int i;
1863         int max = ARRAY_SIZE(desc_lookup_text);
1864
1865         if (num < max)
1866                 return desc_lookup_text[num];
1867
1868         max = ARRAY_SIZE(advanced_lookup) - 1;
1869         for (i = 0; i < max; i++) {
1870                 if (advanced_lookup[i].num == num)
1871                         break;;
1872         }
1873         return advanced_lookup[i].name;
1874 }
1875
1876 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1877 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1878
1879 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1880 {
1881         u32 data2, line;
1882         u32 desc, time, count, base, data1;
1883         u32 blink1, blink2, ilink1, ilink2;
1884         u32 pc, hcmd;
1885
1886         if (priv->ucode_type == UCODE_INIT) {
1887                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1888                 if (!base)
1889                         base = priv->_agn.init_errlog_ptr;
1890         } else {
1891                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1892                 if (!base)
1893                         base = priv->_agn.inst_errlog_ptr;
1894         }
1895
1896         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1897                 IWL_ERR(priv,
1898                         "Not valid error log pointer 0x%08X for %s uCode\n",
1899                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1900                 return;
1901         }
1902
1903         count = iwl_read_targ_mem(priv, base);
1904
1905         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1906                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1907                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1908                         priv->status, count);
1909         }
1910
1911         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1912         priv->isr_stats.err_code = desc;
1913         pc = iwl_read_targ_mem(priv, base + 2 * sizeof(u32));
1914         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1915         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1916         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1917         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1918         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1919         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1920         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1921         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1922         hcmd = iwl_read_targ_mem(priv, base + 22 * sizeof(u32));
1923
1924         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1925                                       blink1, blink2, ilink1, ilink2);
1926
1927         IWL_ERR(priv, "Desc                                  Time       "
1928                 "data1      data2      line\n");
1929         IWL_ERR(priv, "%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
1930                 desc_lookup(desc), desc, time, data1, data2, line);
1931         IWL_ERR(priv, "pc      blink1  blink2  ilink1  ilink2  hcmd\n");
1932         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n",
1933                 pc, blink1, blink2, ilink1, ilink2, hcmd);
1934 }
1935
1936 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1937
1938 /**
1939  * iwl_print_event_log - Dump error event log to syslog
1940  *
1941  */
1942 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1943                                u32 num_events, u32 mode,
1944                                int pos, char **buf, size_t bufsz)
1945 {
1946         u32 i;
1947         u32 base;       /* SRAM byte address of event log header */
1948         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1949         u32 ptr;        /* SRAM byte address of log data */
1950         u32 ev, time, data; /* event log data */
1951         unsigned long reg_flags;
1952
1953         if (num_events == 0)
1954                 return pos;
1955
1956         if (priv->ucode_type == UCODE_INIT) {
1957                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1958                 if (!base)
1959                         base = priv->_agn.init_evtlog_ptr;
1960         } else {
1961                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1962                 if (!base)
1963                         base = priv->_agn.inst_evtlog_ptr;
1964         }
1965
1966         if (mode == 0)
1967                 event_size = 2 * sizeof(u32);
1968         else
1969                 event_size = 3 * sizeof(u32);
1970
1971         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1972
1973         /* Make sure device is powered up for SRAM reads */
1974         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1975         iwl_grab_nic_access(priv);
1976
1977         /* Set starting address; reads will auto-increment */
1978         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1979         rmb();
1980
1981         /* "time" is actually "data" for mode 0 (no timestamp).
1982         * place event id # at far right for easier visual parsing. */
1983         for (i = 0; i < num_events; i++) {
1984                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1985                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1986                 if (mode == 0) {
1987                         /* data, ev */
1988                         if (bufsz) {
1989                                 pos += scnprintf(*buf + pos, bufsz - pos,
1990                                                 "EVT_LOG:0x%08x:%04u\n",
1991                                                 time, ev);
1992                         } else {
1993                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1994                                         time, ev);
1995                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1996                                         time, ev);
1997                         }
1998                 } else {
1999                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2000                         if (bufsz) {
2001                                 pos += scnprintf(*buf + pos, bufsz - pos,
2002                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
2003                                                  time, data, ev);
2004                         } else {
2005                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
2006                                         time, data, ev);
2007                                 trace_iwlwifi_dev_ucode_event(priv, time,
2008                                         data, ev);
2009                         }
2010                 }
2011         }
2012
2013         /* Allow device to power down */
2014         iwl_release_nic_access(priv);
2015         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
2016         return pos;
2017 }
2018
2019 /**
2020  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
2021  */
2022 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
2023                                     u32 num_wraps, u32 next_entry,
2024                                     u32 size, u32 mode,
2025                                     int pos, char **buf, size_t bufsz)
2026 {
2027         /*
2028          * display the newest DEFAULT_LOG_ENTRIES entries
2029          * i.e the entries just before the next ont that uCode would fill.
2030          */
2031         if (num_wraps) {
2032                 if (next_entry < size) {
2033                         pos = iwl_print_event_log(priv,
2034                                                 capacity - (size - next_entry),
2035                                                 size - next_entry, mode,
2036                                                 pos, buf, bufsz);
2037                         pos = iwl_print_event_log(priv, 0,
2038                                                   next_entry, mode,
2039                                                   pos, buf, bufsz);
2040                 } else
2041                         pos = iwl_print_event_log(priv, next_entry - size,
2042                                                   size, mode, pos, buf, bufsz);
2043         } else {
2044                 if (next_entry < size) {
2045                         pos = iwl_print_event_log(priv, 0, next_entry,
2046                                                   mode, pos, buf, bufsz);
2047                 } else {
2048                         pos = iwl_print_event_log(priv, next_entry - size,
2049                                                   size, mode, pos, buf, bufsz);
2050                 }
2051         }
2052         return pos;
2053 }
2054
2055 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
2056
2057 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
2058                             char **buf, bool display)
2059 {
2060         u32 base;       /* SRAM byte address of event log header */
2061         u32 capacity;   /* event log capacity in # entries */
2062         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2063         u32 num_wraps;  /* # times uCode wrapped to top of log */
2064         u32 next_entry; /* index of next entry to be written by uCode */
2065         u32 size;       /* # entries that we'll print */
2066         u32 logsize;
2067         int pos = 0;
2068         size_t bufsz = 0;
2069
2070         if (priv->ucode_type == UCODE_INIT) {
2071                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2072                 logsize = priv->_agn.init_evtlog_size;
2073                 if (!base)
2074                         base = priv->_agn.init_evtlog_ptr;
2075         } else {
2076                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2077                 logsize = priv->_agn.inst_evtlog_size;
2078                 if (!base)
2079                         base = priv->_agn.inst_evtlog_ptr;
2080         }
2081
2082         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2083                 IWL_ERR(priv,
2084                         "Invalid event log pointer 0x%08X for %s uCode\n",
2085                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
2086                 return -EINVAL;
2087         }
2088
2089         /* event log header */
2090         capacity = iwl_read_targ_mem(priv, base);
2091         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2092         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2093         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2094
2095         if (capacity > logsize) {
2096                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
2097                         capacity, logsize);
2098                 capacity = logsize;
2099         }
2100
2101         if (next_entry > logsize) {
2102                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2103                         next_entry, logsize);
2104                 next_entry = logsize;
2105         }
2106
2107         size = num_wraps ? capacity : next_entry;
2108
2109         /* bail out if nothing in log */
2110         if (size == 0) {
2111                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2112                 return pos;
2113         }
2114
2115         /* enable/disable bt channel inhibition */
2116         priv->bt_ch_announce = iwlagn_bt_ch_announce;
2117
2118 #ifdef CONFIG_IWLWIFI_DEBUG
2119         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2120                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2121                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2122 #else
2123         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2124                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2125 #endif
2126         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2127                 size);
2128
2129 #ifdef CONFIG_IWLWIFI_DEBUG
2130         if (display) {
2131                 if (full_log)
2132                         bufsz = capacity * 48;
2133                 else
2134                         bufsz = size * 48;
2135                 *buf = kmalloc(bufsz, GFP_KERNEL);
2136                 if (!*buf)
2137                         return -ENOMEM;
2138         }
2139         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2140                 /*
2141                  * if uCode has wrapped back to top of log,
2142                  * start at the oldest entry,
2143                  * i.e the next one that uCode would fill.
2144                  */
2145                 if (num_wraps)
2146                         pos = iwl_print_event_log(priv, next_entry,
2147                                                 capacity - next_entry, mode,
2148                                                 pos, buf, bufsz);
2149                 /* (then/else) start at top of log */
2150                 pos = iwl_print_event_log(priv, 0,
2151                                           next_entry, mode, pos, buf, bufsz);
2152         } else
2153                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2154                                                 next_entry, size, mode,
2155                                                 pos, buf, bufsz);
2156 #else
2157         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2158                                         next_entry, size, mode,
2159                                         pos, buf, bufsz);
2160 #endif
2161         return pos;
2162 }
2163
2164 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2165 {
2166         struct iwl_ct_kill_config cmd;
2167         struct iwl_ct_kill_throttling_config adv_cmd;
2168         unsigned long flags;
2169         int ret = 0;
2170
2171         spin_lock_irqsave(&priv->lock, flags);
2172         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2173                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2174         spin_unlock_irqrestore(&priv->lock, flags);
2175         priv->thermal_throttle.ct_kill_toggle = false;
2176
2177         if (priv->cfg->base_params->support_ct_kill_exit) {
2178                 adv_cmd.critical_temperature_enter =
2179                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2180                 adv_cmd.critical_temperature_exit =
2181                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2182
2183                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2184                                        sizeof(adv_cmd), &adv_cmd);
2185                 if (ret)
2186                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2187                 else
2188                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2189                                         "succeeded, "
2190                                         "critical temperature enter is %d,"
2191                                         "exit is %d\n",
2192                                        priv->hw_params.ct_kill_threshold,
2193                                        priv->hw_params.ct_kill_exit_threshold);
2194         } else {
2195                 cmd.critical_temperature_R =
2196                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2197
2198                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2199                                        sizeof(cmd), &cmd);
2200                 if (ret)
2201                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2202                 else
2203                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2204                                         "succeeded, "
2205                                         "critical temperature is %d\n",
2206                                         priv->hw_params.ct_kill_threshold);
2207         }
2208 }
2209
2210 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
2211 {
2212         struct iwl_calib_cfg_cmd calib_cfg_cmd;
2213         struct iwl_host_cmd cmd = {
2214                 .id = CALIBRATION_CFG_CMD,
2215                 .len = sizeof(struct iwl_calib_cfg_cmd),
2216                 .data = &calib_cfg_cmd,
2217         };
2218
2219         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
2220         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
2221         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
2222
2223         return iwl_send_cmd(priv, &cmd);
2224 }
2225
2226
2227 /**
2228  * iwl_alive_start - called after REPLY_ALIVE notification received
2229  *                   from protocol/runtime uCode (initialization uCode's
2230  *                   Alive gets handled by iwl_init_alive_start()).
2231  */
2232 static void iwl_alive_start(struct iwl_priv *priv)
2233 {
2234         int ret = 0;
2235         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2236
2237         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2238
2239         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2240          * This is a paranoid check, because we would not have gotten the
2241          * "runtime" alive if code weren't properly loaded.  */
2242         if (iwl_verify_ucode(priv)) {
2243                 /* Runtime instruction load was bad;
2244                  * take it all the way back down so we can try again */
2245                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2246                 goto restart;
2247         }
2248
2249         ret = priv->cfg->ops->lib->alive_notify(priv);
2250         if (ret) {
2251                 IWL_WARN(priv,
2252                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2253                 goto restart;
2254         }
2255
2256
2257         /* After the ALIVE response, we can send host commands to the uCode */
2258         set_bit(STATUS_ALIVE, &priv->status);
2259
2260         /* Enable watchdog to monitor the driver tx queues */
2261         iwl_setup_watchdog(priv);
2262
2263         if (iwl_is_rfkill(priv))
2264                 return;
2265
2266         /* download priority table before any calibration request */
2267         if (priv->cfg->bt_params &&
2268             priv->cfg->bt_params->advanced_bt_coexist) {
2269                 /* Configure Bluetooth device coexistence support */
2270                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2271                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2272                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2273                 priv->cfg->ops->hcmd->send_bt_config(priv);
2274                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2275                 iwlagn_send_prio_tbl(priv);
2276
2277                 /* FIXME: w/a to force change uCode BT state machine */
2278                 iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2279                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2280                 iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2281                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2282         }
2283         if (priv->hw_params.calib_rt_cfg)
2284                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2285
2286         ieee80211_wake_queues(priv->hw);
2287
2288         priv->active_rate = IWL_RATES_MASK;
2289
2290         /* Configure Tx antenna selection based on H/W config */
2291         if (priv->cfg->ops->hcmd->set_tx_ant)
2292                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2293
2294         if (iwl_is_associated_ctx(ctx)) {
2295                 struct iwl_rxon_cmd *active_rxon =
2296                                 (struct iwl_rxon_cmd *)&ctx->active;
2297                 /* apply any changes in staging */
2298                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2299                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2300         } else {
2301                 struct iwl_rxon_context *tmp;
2302                 /* Initialize our rx_config data */
2303                 for_each_context(priv, tmp)
2304                         iwl_connection_init_rx_config(priv, tmp);
2305
2306                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2307                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2308         }
2309
2310         if (!priv->cfg->bt_params || (priv->cfg->bt_params &&
2311             !priv->cfg->bt_params->advanced_bt_coexist)) {
2312                 /*
2313                  * default is 2-wire BT coexexistence support
2314                  */
2315                 priv->cfg->ops->hcmd->send_bt_config(priv);
2316         }
2317
2318         iwl_reset_run_time_calib(priv);
2319
2320         set_bit(STATUS_READY, &priv->status);
2321
2322         /* Configure the adapter for unassociated operation */
2323         iwlcore_commit_rxon(priv, ctx);
2324
2325         /* At this point, the NIC is initialized and operational */
2326         iwl_rf_kill_ct_config(priv);
2327
2328         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2329         wake_up_interruptible(&priv->wait_command_queue);
2330
2331         iwl_power_update_mode(priv, true);
2332         IWL_DEBUG_INFO(priv, "Updated power mode\n");
2333
2334
2335         return;
2336
2337  restart:
2338         queue_work(priv->workqueue, &priv->restart);
2339 }
2340
2341 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2342
2343 static void __iwl_down(struct iwl_priv *priv)
2344 {
2345         unsigned long flags;
2346         int exit_pending;
2347
2348         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2349
2350         iwl_scan_cancel_timeout(priv, 200);
2351
2352         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2353
2354         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2355          * to prevent rearm timer */
2356         del_timer_sync(&priv->watchdog);
2357
2358         iwl_clear_ucode_stations(priv, NULL);
2359         iwl_dealloc_bcast_stations(priv);
2360         iwl_clear_driver_stations(priv);
2361
2362         /* reset BT coex data */
2363         priv->bt_status = 0;
2364         if (priv->cfg->bt_params)
2365                 priv->bt_traffic_load =
2366                          priv->cfg->bt_params->bt_init_traffic_load;
2367         else
2368                 priv->bt_traffic_load = 0;
2369         priv->bt_full_concurrent = false;
2370         priv->bt_ci_compliance = 0;
2371
2372         /* Unblock any waiting calls */
2373         wake_up_interruptible_all(&priv->wait_command_queue);
2374
2375         /* Wipe out the EXIT_PENDING status bit if we are not actually
2376          * exiting the module */
2377         if (!exit_pending)
2378                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2379
2380         /* stop and reset the on-board processor */
2381         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2382
2383         /* tell the device to stop sending interrupts */
2384         spin_lock_irqsave(&priv->lock, flags);
2385         iwl_disable_interrupts(priv);
2386         spin_unlock_irqrestore(&priv->lock, flags);
2387         iwl_synchronize_irq(priv);
2388
2389         if (priv->mac80211_registered)
2390                 ieee80211_stop_queues(priv->hw);
2391
2392         /* If we have not previously called iwl_init() then
2393          * clear all bits but the RF Kill bit and return */
2394         if (!iwl_is_init(priv)) {
2395                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2396                                         STATUS_RF_KILL_HW |
2397                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2398                                         STATUS_GEO_CONFIGURED |
2399                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2400                                         STATUS_EXIT_PENDING;
2401                 goto exit;
2402         }
2403
2404         /* ...otherwise clear out all the status bits but the RF Kill
2405          * bit and continue taking the NIC down. */
2406         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2407                                 STATUS_RF_KILL_HW |
2408                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2409                                 STATUS_GEO_CONFIGURED |
2410                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2411                                 STATUS_FW_ERROR |
2412                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2413                                 STATUS_EXIT_PENDING;
2414
2415         /* device going down, Stop using ICT table */
2416         if (priv->cfg->ops->lib->isr_ops.disable)
2417                 priv->cfg->ops->lib->isr_ops.disable(priv);
2418
2419         iwlagn_txq_ctx_stop(priv);
2420         iwlagn_rxq_stop(priv);
2421
2422         /* Power-down device's busmaster DMA clocks */
2423         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2424         udelay(5);
2425
2426         /* Make sure (redundant) we've released our request to stay awake */
2427         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2428
2429         /* Stop the device, and put it in low power state */
2430         iwl_apm_stop(priv);
2431
2432  exit:
2433         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2434
2435         dev_kfree_skb(priv->beacon_skb);
2436         priv->beacon_skb = NULL;
2437
2438         /* clear out any free frames */
2439         iwl_clear_free_frames(priv);
2440 }
2441
2442 static void iwl_down(struct iwl_priv *priv)
2443 {
2444         mutex_lock(&priv->mutex);
2445         __iwl_down(priv);
2446         mutex_unlock(&priv->mutex);
2447
2448         iwl_cancel_deferred_work(priv);
2449 }
2450
2451 #define HW_READY_TIMEOUT (50)
2452
2453 static int iwl_set_hw_ready(struct iwl_priv *priv)
2454 {
2455         int ret = 0;
2456
2457         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2458                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2459
2460         /* See if we got it */
2461         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2462                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2463                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2464                                 HW_READY_TIMEOUT);
2465         if (ret != -ETIMEDOUT)
2466                 priv->hw_ready = true;
2467         else
2468                 priv->hw_ready = false;
2469
2470         IWL_DEBUG_INFO(priv, "hardware %s\n",
2471                       (priv->hw_ready == 1) ? "ready" : "not ready");
2472         return ret;
2473 }
2474
2475 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2476 {
2477         int ret = 0;
2478
2479         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2480
2481         ret = iwl_set_hw_ready(priv);
2482         if (priv->hw_ready)
2483                 return ret;
2484
2485         /* If HW is not ready, prepare the conditions to check again */
2486         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2487                         CSR_HW_IF_CONFIG_REG_PREPARE);
2488
2489         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2490                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2491                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2492
2493         /* HW should be ready by now, check again. */
2494         if (ret != -ETIMEDOUT)
2495                 iwl_set_hw_ready(priv);
2496
2497         return ret;
2498 }
2499
2500 #define MAX_HW_RESTARTS 5
2501
2502 static int __iwl_up(struct iwl_priv *priv)
2503 {
2504         struct iwl_rxon_context *ctx;
2505         int i;
2506         int ret;
2507
2508         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2509                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2510                 return -EIO;
2511         }
2512
2513         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2514                 IWL_ERR(priv, "ucode not available for device bringup\n");
2515                 return -EIO;
2516         }
2517
2518         for_each_context(priv, ctx) {
2519                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2520                 if (ret) {
2521                         iwl_dealloc_bcast_stations(priv);
2522                         return ret;
2523                 }
2524         }
2525
2526         iwl_prepare_card_hw(priv);
2527
2528         if (!priv->hw_ready) {
2529                 IWL_WARN(priv, "Exit HW not ready\n");
2530                 return -EIO;
2531         }
2532
2533         /* If platform's RF_KILL switch is NOT set to KILL */
2534         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2535                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2536         else
2537                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2538
2539         if (iwl_is_rfkill(priv)) {
2540                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2541
2542                 iwl_enable_interrupts(priv);
2543                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2544                 return 0;
2545         }
2546
2547         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2548
2549         /* must be initialised before iwl_hw_nic_init */
2550         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
2551                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
2552         else
2553                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
2554
2555         ret = iwlagn_hw_nic_init(priv);
2556         if (ret) {
2557                 IWL_ERR(priv, "Unable to init nic\n");
2558                 return ret;
2559         }
2560
2561         /* make sure rfkill handshake bits are cleared */
2562         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2563         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2564                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2565
2566         /* clear (again), then enable host interrupts */
2567         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2568         iwl_enable_interrupts(priv);
2569
2570         /* really make sure rfkill handshake bits are cleared */
2571         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2572         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2573
2574         /* Copy original ucode data image from disk into backup cache.
2575          * This will be used to initialize the on-board processor's
2576          * data SRAM for a clean start when the runtime program first loads. */
2577         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2578                priv->ucode_data.len);
2579
2580         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2581
2582                 /* load bootstrap state machine,
2583                  * load bootstrap program into processor's memory,
2584                  * prepare to load the "initialize" uCode */
2585                 ret = priv->cfg->ops->lib->load_ucode(priv);
2586
2587                 if (ret) {
2588                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2589                                 ret);
2590                         continue;
2591                 }
2592
2593                 /* start card; "initialize" will load runtime ucode */
2594                 iwl_nic_start(priv);
2595
2596                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2597
2598                 return 0;
2599         }
2600
2601         set_bit(STATUS_EXIT_PENDING, &priv->status);
2602         __iwl_down(priv);
2603         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2604
2605         /* tried to restart and config the device for as long as our
2606          * patience could withstand */
2607         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2608         return -EIO;
2609 }
2610
2611
2612 /*****************************************************************************
2613  *
2614  * Workqueue callbacks
2615  *
2616  *****************************************************************************/
2617
2618 static void iwl_bg_init_alive_start(struct work_struct *data)
2619 {
2620         struct iwl_priv *priv =
2621             container_of(data, struct iwl_priv, init_alive_start.work);
2622
2623         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2624                 return;
2625
2626         mutex_lock(&priv->mutex);
2627         priv->cfg->ops->lib->init_alive_start(priv);
2628         mutex_unlock(&priv->mutex);
2629 }
2630
2631 static void iwl_bg_alive_start(struct work_struct *data)
2632 {
2633         struct iwl_priv *priv =
2634             container_of(data, struct iwl_priv, alive_start.work);
2635
2636         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2637                 return;
2638
2639         /* enable dram interrupt */
2640         if (priv->cfg->ops->lib->isr_ops.reset)
2641                 priv->cfg->ops->lib->isr_ops.reset(priv);
2642
2643         mutex_lock(&priv->mutex);
2644         iwl_alive_start(priv);
2645         mutex_unlock(&priv->mutex);
2646 }
2647
2648 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2649 {
2650         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2651                         run_time_calib_work);
2652
2653         mutex_lock(&priv->mutex);
2654
2655         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2656             test_bit(STATUS_SCANNING, &priv->status)) {
2657                 mutex_unlock(&priv->mutex);
2658                 return;
2659         }
2660
2661         if (priv->start_calib) {
2662                 if (iwl_bt_statistics(priv)) {
2663                         iwl_chain_noise_calibration(priv,
2664                                         (void *)&priv->_agn.statistics_bt);
2665                         iwl_sensitivity_calibration(priv,
2666                                         (void *)&priv->_agn.statistics_bt);
2667                 } else {
2668                         iwl_chain_noise_calibration(priv,
2669                                         (void *)&priv->_agn.statistics);
2670                         iwl_sensitivity_calibration(priv,
2671                                         (void *)&priv->_agn.statistics);
2672                 }
2673         }
2674
2675         mutex_unlock(&priv->mutex);
2676 }
2677
2678 static void iwl_bg_restart(struct work_struct *data)
2679 {
2680         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2681
2682         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2683                 return;
2684
2685         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2686                 struct iwl_rxon_context *ctx;
2687                 bool bt_full_concurrent;
2688                 u8 bt_ci_compliance;
2689                 u8 bt_load;
2690                 u8 bt_status;
2691
2692                 mutex_lock(&priv->mutex);
2693                 for_each_context(priv, ctx)
2694                         ctx->vif = NULL;
2695                 priv->is_open = 0;
2696
2697                 /*
2698                  * __iwl_down() will clear the BT status variables,
2699                  * which is correct, but when we restart we really
2700                  * want to keep them so restore them afterwards.
2701                  *
2702                  * The restart process will later pick them up and
2703                  * re-configure the hw when we reconfigure the BT
2704                  * command.
2705                  */
2706                 bt_full_concurrent = priv->bt_full_concurrent;
2707                 bt_ci_compliance = priv->bt_ci_compliance;
2708                 bt_load = priv->bt_traffic_load;
2709                 bt_status = priv->bt_status;
2710
2711                 __iwl_down(priv);
2712
2713                 priv->bt_full_concurrent = bt_full_concurrent;
2714                 priv->bt_ci_compliance = bt_ci_compliance;
2715                 priv->bt_traffic_load = bt_load;
2716                 priv->bt_status = bt_status;
2717
2718                 mutex_unlock(&priv->mutex);
2719                 iwl_cancel_deferred_work(priv);
2720                 ieee80211_restart_hw(priv->hw);
2721         } else {
2722                 iwl_down(priv);
2723
2724                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2725                         return;
2726
2727                 mutex_lock(&priv->mutex);
2728                 __iwl_up(priv);
2729                 mutex_unlock(&priv->mutex);
2730         }
2731 }
2732
2733 static void iwl_bg_rx_replenish(struct work_struct *data)
2734 {
2735         struct iwl_priv *priv =
2736             container_of(data, struct iwl_priv, rx_replenish);
2737
2738         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2739                 return;
2740
2741         mutex_lock(&priv->mutex);
2742         iwlagn_rx_replenish(priv);
2743         mutex_unlock(&priv->mutex);
2744 }
2745
2746 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2747                                  struct ieee80211_channel *chan,
2748                                  enum nl80211_channel_type channel_type,
2749                                  unsigned int wait)
2750 {
2751         struct iwl_priv *priv = hw->priv;
2752         int ret;
2753
2754         /* Not supported if we don't have PAN */
2755         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2756                 ret = -EOPNOTSUPP;
2757                 goto free;
2758         }
2759
2760         /* Not supported on pre-P2P firmware */
2761         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2762                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2763                 ret = -EOPNOTSUPP;
2764                 goto free;
2765         }
2766
2767         mutex_lock(&priv->mutex);
2768
2769         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2770                 /*
2771                  * If the PAN context is free, use the normal
2772                  * way of doing remain-on-channel offload + TX.
2773                  */
2774                 ret = 1;
2775                 goto out;
2776         }
2777
2778         /* TODO: queue up if scanning? */
2779         if (test_bit(STATUS_SCANNING, &priv->status) ||
2780             priv->_agn.offchan_tx_skb) {
2781                 ret = -EBUSY;
2782                 goto out;
2783         }
2784
2785         /*
2786          * max_scan_ie_len doesn't include the blank SSID or the header,
2787          * so need to add that again here.
2788          */
2789         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2790                 ret = -ENOBUFS;
2791                 goto out;
2792         }
2793
2794         priv->_agn.offchan_tx_skb = skb;
2795         priv->_agn.offchan_tx_timeout = wait;
2796         priv->_agn.offchan_tx_chan = chan;
2797
2798         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2799                                 IWL_SCAN_OFFCH_TX, chan->band);
2800         if (ret)
2801                 priv->_agn.offchan_tx_skb = NULL;
2802  out:
2803         mutex_unlock(&priv->mutex);
2804  free:
2805         if (ret < 0)
2806                 kfree_skb(skb);
2807
2808         return ret;
2809 }
2810
2811 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2812 {
2813         struct iwl_priv *priv = hw->priv;
2814         int ret;
2815
2816         mutex_lock(&priv->mutex);
2817
2818         if (!priv->_agn.offchan_tx_skb) {
2819                 ret = -EINVAL;
2820                 goto unlock;
2821         }
2822
2823         priv->_agn.offchan_tx_skb = NULL;
2824
2825         ret = iwl_scan_cancel_timeout(priv, 200);
2826         if (ret)
2827                 ret = -EIO;
2828 unlock:
2829         mutex_unlock(&priv->mutex);
2830
2831         return ret;
2832 }
2833
2834 /*****************************************************************************
2835  *
2836  * mac80211 entry point functions
2837  *
2838  *****************************************************************************/
2839
2840 #define UCODE_READY_TIMEOUT     (4 * HZ)
2841
2842 /*
2843  * Not a mac80211 entry point function, but it fits in with all the
2844  * other mac80211 functions grouped here.
2845  */
2846 static int iwl_mac_setup_register(struct iwl_priv *priv,
2847                                   struct iwlagn_ucode_capabilities *capa)
2848 {
2849         int ret;
2850         struct ieee80211_hw *hw = priv->hw;
2851         struct iwl_rxon_context *ctx;
2852
2853         hw->rate_control_algorithm = "iwl-agn-rs";
2854
2855         /* Tell mac80211 our characteristics */
2856         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2857                     IEEE80211_HW_AMPDU_AGGREGATION |
2858                     IEEE80211_HW_NEED_DTIM_PERIOD |
2859                     IEEE80211_HW_SPECTRUM_MGMT |
2860                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2861
2862         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2863
2864         if (!priv->cfg->base_params->broken_powersave)
2865                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2866                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2867
2868         if (priv->cfg->sku & IWL_SKU_N)
2869                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2870                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2871
2872         hw->sta_data_size = sizeof(struct iwl_station_priv);
2873         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2874
2875         for_each_context(priv, ctx) {
2876                 hw->wiphy->interface_modes |= ctx->interface_modes;
2877                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2878         }
2879
2880         hw->wiphy->max_remain_on_channel_duration = 1000;
2881
2882         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2883                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2884                             WIPHY_FLAG_IBSS_RSN;
2885
2886         /*
2887          * For now, disable PS by default because it affects
2888          * RX performance significantly.
2889          */
2890         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2891
2892         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2893         /* we create the 802.11 header and a zero-length SSID element */
2894         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2895
2896         /* Default value; 4 EDCA QOS priorities */
2897         hw->queues = 4;
2898
2899         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2900
2901         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2902                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2903                         &priv->bands[IEEE80211_BAND_2GHZ];
2904         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2905                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2906                         &priv->bands[IEEE80211_BAND_5GHZ];
2907
2908         iwl_leds_init(priv);
2909
2910         ret = ieee80211_register_hw(priv->hw);
2911         if (ret) {
2912                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2913                 return ret;
2914         }
2915         priv->mac80211_registered = 1;
2916
2917         return 0;
2918 }
2919
2920
2921 int iwlagn_mac_start(struct ieee80211_hw *hw)
2922 {
2923         struct iwl_priv *priv = hw->priv;
2924         int ret;
2925
2926         IWL_DEBUG_MAC80211(priv, "enter\n");
2927
2928         /* we should be verifying the device is ready to be opened */
2929         mutex_lock(&priv->mutex);
2930         ret = __iwl_up(priv);
2931         mutex_unlock(&priv->mutex);
2932
2933         if (ret)
2934                 return ret;
2935
2936         if (iwl_is_rfkill(priv))
2937                 goto out;
2938
2939         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2940
2941         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2942          * mac80211 will not be run successfully. */
2943         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2944                         test_bit(STATUS_READY, &priv->status),
2945                         UCODE_READY_TIMEOUT);
2946         if (!ret) {
2947                 if (!test_bit(STATUS_READY, &priv->status)) {
2948                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2949                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2950                         return -ETIMEDOUT;
2951                 }
2952         }
2953
2954         iwlagn_led_enable(priv);
2955
2956 out:
2957         priv->is_open = 1;
2958         IWL_DEBUG_MAC80211(priv, "leave\n");
2959         return 0;
2960 }
2961
2962 void iwlagn_mac_stop(struct ieee80211_hw *hw)
2963 {
2964         struct iwl_priv *priv = hw->priv;
2965
2966         IWL_DEBUG_MAC80211(priv, "enter\n");
2967
2968         if (!priv->is_open)
2969                 return;
2970
2971         priv->is_open = 0;
2972
2973         iwl_down(priv);
2974
2975         flush_workqueue(priv->workqueue);
2976
2977         /* User space software may expect getting rfkill changes
2978          * even if interface is down */
2979         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2980         iwl_enable_rfkill_int(priv);
2981
2982         IWL_DEBUG_MAC80211(priv, "leave\n");
2983 }
2984
2985 void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2986 {
2987         struct iwl_priv *priv = hw->priv;
2988
2989         IWL_DEBUG_MACDUMP(priv, "enter\n");
2990
2991         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2992                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2993
2994         if (iwlagn_tx_skb(priv, skb))
2995                 dev_kfree_skb_any(skb);
2996
2997         IWL_DEBUG_MACDUMP(priv, "leave\n");
2998 }
2999
3000 void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
3001                                 struct ieee80211_vif *vif,
3002                                 struct ieee80211_key_conf *keyconf,
3003                                 struct ieee80211_sta *sta,
3004                                 u32 iv32, u16 *phase1key)
3005 {
3006         struct iwl_priv *priv = hw->priv;
3007         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
3008
3009         IWL_DEBUG_MAC80211(priv, "enter\n");
3010
3011         iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
3012                             iv32, phase1key);
3013
3014         IWL_DEBUG_MAC80211(priv, "leave\n");
3015 }
3016
3017 int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3018                        struct ieee80211_vif *vif, struct ieee80211_sta *sta,
3019                        struct ieee80211_key_conf *key)
3020 {
3021         struct iwl_priv *priv = hw->priv;
3022         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;