Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[~shefty/rdma-dev.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
63
64 /******************************************************************************
65  *
66  * module boiler plate
67  *
68  ******************************************************************************/
69
70 /*
71  * module name, copyright, version, etc.
72  */
73 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
74
75 #ifdef CONFIG_IWLWIFI_DEBUG
76 #define VD "d"
77 #else
78 #define VD
79 #endif
80
81 #define DRV_VERSION     IWLWIFI_VERSION VD
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88 MODULE_ALIAS("iwl4965");
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  * 4965 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 /******************************************************************************
428  *
429  * Generic RX handler implementations
430  *
431  ******************************************************************************/
432 static void iwl_rx_reply_alive(struct iwl_priv *priv,
433                                 struct iwl_rx_mem_buffer *rxb)
434 {
435         struct iwl_rx_packet *pkt = rxb_addr(rxb);
436         struct iwl_alive_resp *palive;
437         struct delayed_work *pwork;
438
439         palive = &pkt->u.alive_frame;
440
441         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
442                        "0x%01X 0x%01X\n",
443                        palive->is_valid, palive->ver_type,
444                        palive->ver_subtype);
445
446         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
447                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
448                 memcpy(&priv->card_alive_init,
449                        &pkt->u.alive_frame,
450                        sizeof(struct iwl_init_alive_resp));
451                 pwork = &priv->init_alive_start;
452         } else {
453                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
454                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
455                        sizeof(struct iwl_alive_resp));
456                 pwork = &priv->alive_start;
457         }
458
459         /* We delay the ALIVE response by 5ms to
460          * give the HW RF Kill time to activate... */
461         if (palive->is_valid == UCODE_VALID_OK)
462                 queue_delayed_work(priv->workqueue, pwork,
463                                    msecs_to_jiffies(5));
464         else
465                 IWL_WARN(priv, "uCode did not respond OK.\n");
466 }
467
468 static void iwl_bg_beacon_update(struct work_struct *work)
469 {
470         struct iwl_priv *priv =
471                 container_of(work, struct iwl_priv, beacon_update);
472         struct sk_buff *beacon;
473
474         mutex_lock(&priv->mutex);
475         if (!priv->beacon_ctx) {
476                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
477                 goto out;
478         }
479
480         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
481                 /*
482                  * The ucode will send beacon notifications even in
483                  * IBSS mode, but we don't want to process them. But
484                  * we need to defer the type check to here due to
485                  * requiring locking around the beacon_ctx access.
486                  */
487                 goto out;
488         }
489
490         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
491         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
492         if (!beacon) {
493                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
494                 goto out;
495         }
496
497         /* new beacon skb is allocated every time; dispose previous.*/
498         dev_kfree_skb(priv->beacon_skb);
499
500         priv->beacon_skb = beacon;
501
502         iwlagn_send_beacon_cmd(priv);
503  out:
504         mutex_unlock(&priv->mutex);
505 }
506
507 static void iwl_bg_bt_runtime_config(struct work_struct *work)
508 {
509         struct iwl_priv *priv =
510                 container_of(work, struct iwl_priv, bt_runtime_config);
511
512         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
513                 return;
514
515         /* dont send host command if rf-kill is on */
516         if (!iwl_is_ready_rf(priv))
517                 return;
518         priv->cfg->ops->hcmd->send_bt_config(priv);
519 }
520
521 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
522 {
523         struct iwl_priv *priv =
524                 container_of(work, struct iwl_priv, bt_full_concurrency);
525         struct iwl_rxon_context *ctx;
526
527         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
528                 return;
529
530         /* dont send host command if rf-kill is on */
531         if (!iwl_is_ready_rf(priv))
532                 return;
533
534         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
535                        priv->bt_full_concurrent ?
536                        "full concurrency" : "3-wire");
537
538         /*
539          * LQ & RXON updated cmds must be sent before BT Config cmd
540          * to avoid 3-wire collisions
541          */
542         mutex_lock(&priv->mutex);
543         for_each_context(priv, ctx) {
544                 if (priv->cfg->ops->hcmd->set_rxon_chain)
545                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
546                 iwlcore_commit_rxon(priv, ctx);
547         }
548         mutex_unlock(&priv->mutex);
549
550         priv->cfg->ops->hcmd->send_bt_config(priv);
551 }
552
553 /**
554  * iwl_bg_statistics_periodic - Timer callback to queue statistics
555  *
556  * This callback is provided in order to send a statistics request.
557  *
558  * This timer function is continually reset to execute within
559  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
560  * was received.  We need to ensure we receive the statistics in order
561  * to update the temperature used for calibrating the TXPOWER.
562  */
563 static void iwl_bg_statistics_periodic(unsigned long data)
564 {
565         struct iwl_priv *priv = (struct iwl_priv *)data;
566
567         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
568                 return;
569
570         /* dont send host command if rf-kill is on */
571         if (!iwl_is_ready_rf(priv))
572                 return;
573
574         iwl_send_statistics_request(priv, CMD_ASYNC, false);
575 }
576
577
578 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
579                                         u32 start_idx, u32 num_events,
580                                         u32 mode)
581 {
582         u32 i;
583         u32 ptr;        /* SRAM byte address of log data */
584         u32 ev, time, data; /* event log data */
585         unsigned long reg_flags;
586
587         if (mode == 0)
588                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
589         else
590                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
591
592         /* Make sure device is powered up for SRAM reads */
593         spin_lock_irqsave(&priv->reg_lock, reg_flags);
594         if (iwl_grab_nic_access(priv)) {
595                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
596                 return;
597         }
598
599         /* Set starting address; reads will auto-increment */
600         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
601         rmb();
602
603         /*
604          * "time" is actually "data" for mode 0 (no timestamp).
605          * place event id # at far right for easier visual parsing.
606          */
607         for (i = 0; i < num_events; i++) {
608                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
609                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
610                 if (mode == 0) {
611                         trace_iwlwifi_dev_ucode_cont_event(priv,
612                                                         0, time, ev);
613                 } else {
614                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
615                         trace_iwlwifi_dev_ucode_cont_event(priv,
616                                                 time, data, ev);
617                 }
618         }
619         /* Allow device to power down */
620         iwl_release_nic_access(priv);
621         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
622 }
623
624 static void iwl_continuous_event_trace(struct iwl_priv *priv)
625 {
626         u32 capacity;   /* event log capacity in # entries */
627         u32 base;       /* SRAM byte address of event log header */
628         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
629         u32 num_wraps;  /* # times uCode wrapped to top of log */
630         u32 next_entry; /* index of next entry to be written by uCode */
631
632         if (priv->ucode_type == UCODE_INIT)
633                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
634         else
635                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
636         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
637                 capacity = iwl_read_targ_mem(priv, base);
638                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
639                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
640                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
641         } else
642                 return;
643
644         if (num_wraps == priv->event_log.num_wraps) {
645                 iwl_print_cont_event_trace(priv,
646                                        base, priv->event_log.next_entry,
647                                        next_entry - priv->event_log.next_entry,
648                                        mode);
649                 priv->event_log.non_wraps_count++;
650         } else {
651                 if ((num_wraps - priv->event_log.num_wraps) > 1)
652                         priv->event_log.wraps_more_count++;
653                 else
654                         priv->event_log.wraps_once_count++;
655                 trace_iwlwifi_dev_ucode_wrap_event(priv,
656                                 num_wraps - priv->event_log.num_wraps,
657                                 next_entry, priv->event_log.next_entry);
658                 if (next_entry < priv->event_log.next_entry) {
659                         iwl_print_cont_event_trace(priv, base,
660                                priv->event_log.next_entry,
661                                capacity - priv->event_log.next_entry,
662                                mode);
663
664                         iwl_print_cont_event_trace(priv, base, 0,
665                                 next_entry, mode);
666                 } else {
667                         iwl_print_cont_event_trace(priv, base,
668                                next_entry, capacity - next_entry,
669                                mode);
670
671                         iwl_print_cont_event_trace(priv, base, 0,
672                                 next_entry, mode);
673                 }
674         }
675         priv->event_log.num_wraps = num_wraps;
676         priv->event_log.next_entry = next_entry;
677 }
678
679 /**
680  * iwl_bg_ucode_trace - Timer callback to log ucode event
681  *
682  * The timer is continually set to execute every
683  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
684  * this function is to perform continuous uCode event logging operation
685  * if enabled
686  */
687 static void iwl_bg_ucode_trace(unsigned long data)
688 {
689         struct iwl_priv *priv = (struct iwl_priv *)data;
690
691         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
692                 return;
693
694         if (priv->event_log.ucode_trace) {
695                 iwl_continuous_event_trace(priv);
696                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
697                 mod_timer(&priv->ucode_trace,
698                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
699         }
700 }
701
702 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
703                                 struct iwl_rx_mem_buffer *rxb)
704 {
705         struct iwl_rx_packet *pkt = rxb_addr(rxb);
706         struct iwl4965_beacon_notif *beacon =
707                 (struct iwl4965_beacon_notif *)pkt->u.raw;
708 #ifdef CONFIG_IWLWIFI_DEBUG
709         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
710
711         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
712                 "tsf %d %d rate %d\n",
713                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
714                 beacon->beacon_notify_hdr.failure_frame,
715                 le32_to_cpu(beacon->ibss_mgr_status),
716                 le32_to_cpu(beacon->high_tsf),
717                 le32_to_cpu(beacon->low_tsf), rate);
718 #endif
719
720         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
721
722         if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
723                 queue_work(priv->workqueue, &priv->beacon_update);
724 }
725
726 /* Handle notification from uCode that card's power state is changing
727  * due to software, hardware, or critical temperature RFKILL */
728 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
729                                     struct iwl_rx_mem_buffer *rxb)
730 {
731         struct iwl_rx_packet *pkt = rxb_addr(rxb);
732         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
733         unsigned long status = priv->status;
734
735         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
736                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
737                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
738                           (flags & CT_CARD_DISABLED) ?
739                           "Reached" : "Not reached");
740
741         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
742                      CT_CARD_DISABLED)) {
743
744                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
745                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
746
747                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
748                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
749
750                 if (!(flags & RXON_CARD_DISABLED)) {
751                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
752                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
753                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
754                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
755                 }
756                 if (flags & CT_CARD_DISABLED)
757                         iwl_tt_enter_ct_kill(priv);
758         }
759         if (!(flags & CT_CARD_DISABLED))
760                 iwl_tt_exit_ct_kill(priv);
761
762         if (flags & HW_CARD_DISABLED)
763                 set_bit(STATUS_RF_KILL_HW, &priv->status);
764         else
765                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
766
767
768         if (!(flags & RXON_CARD_DISABLED))
769                 iwl_scan_cancel(priv);
770
771         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
772              test_bit(STATUS_RF_KILL_HW, &priv->status)))
773                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
774                         test_bit(STATUS_RF_KILL_HW, &priv->status));
775         else
776                 wake_up_interruptible(&priv->wait_command_queue);
777 }
778
779 static void iwl_bg_tx_flush(struct work_struct *work)
780 {
781         struct iwl_priv *priv =
782                 container_of(work, struct iwl_priv, tx_flush);
783
784         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
785                 return;
786
787         /* do nothing if rf-kill is on */
788         if (!iwl_is_ready_rf(priv))
789                 return;
790
791         if (priv->cfg->ops->lib->txfifo_flush) {
792                 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
793                 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
794         }
795 }
796
797 /**
798  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
799  *
800  * Setup the RX handlers for each of the reply types sent from the uCode
801  * to the host.
802  *
803  * This function chains into the hardware specific files for them to setup
804  * any hardware specific handlers as well.
805  */
806 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
807 {
808         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
809         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
810         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
811         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
812                         iwl_rx_spectrum_measure_notif;
813         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
814         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
815             iwl_rx_pm_debug_statistics_notif;
816         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
817
818         /*
819          * The same handler is used for both the REPLY to a discrete
820          * statistics request from the host as well as for the periodic
821          * statistics notifications (after received beacons) from the uCode.
822          */
823         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
824         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
825
826         iwl_setup_rx_scan_handlers(priv);
827
828         /* status change handler */
829         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
830
831         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
832             iwl_rx_missed_beacon_notif;
833         /* Rx handlers */
834         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
835         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
836         /* block ack */
837         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba;
838         /* Set up hardware specific Rx handlers */
839         priv->cfg->ops->lib->rx_handler_setup(priv);
840 }
841
842 /**
843  * iwl_rx_handle - Main entry function for receiving responses from uCode
844  *
845  * Uses the priv->rx_handlers callback function array to invoke
846  * the appropriate handlers, including command responses,
847  * frame-received notifications, and other notifications.
848  */
849 void iwl_rx_handle(struct iwl_priv *priv)
850 {
851         struct iwl_rx_mem_buffer *rxb;
852         struct iwl_rx_packet *pkt;
853         struct iwl_rx_queue *rxq = &priv->rxq;
854         u32 r, i;
855         int reclaim;
856         unsigned long flags;
857         u8 fill_rx = 0;
858         u32 count = 8;
859         int total_empty;
860
861         /* uCode's read index (stored in shared DRAM) indicates the last Rx
862          * buffer that the driver may process (last buffer filled by ucode). */
863         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
864         i = rxq->read;
865
866         /* Rx interrupt, but nothing sent from uCode */
867         if (i == r)
868                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
869
870         /* calculate total frames need to be restock after handling RX */
871         total_empty = r - rxq->write_actual;
872         if (total_empty < 0)
873                 total_empty += RX_QUEUE_SIZE;
874
875         if (total_empty > (RX_QUEUE_SIZE / 2))
876                 fill_rx = 1;
877
878         while (i != r) {
879                 int len;
880
881                 rxb = rxq->queue[i];
882
883                 /* If an RXB doesn't have a Rx queue slot associated with it,
884                  * then a bug has been introduced in the queue refilling
885                  * routines -- catch it here */
886                 BUG_ON(rxb == NULL);
887
888                 rxq->queue[i] = NULL;
889
890                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
891                                PAGE_SIZE << priv->hw_params.rx_page_order,
892                                PCI_DMA_FROMDEVICE);
893                 pkt = rxb_addr(rxb);
894
895                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
896                 len += sizeof(u32); /* account for status word */
897                 trace_iwlwifi_dev_rx(priv, pkt, len);
898
899                 /* Reclaim a command buffer only if this packet is a response
900                  *   to a (driver-originated) command.
901                  * If the packet (e.g. Rx frame) originated from uCode,
902                  *   there is no command buffer to reclaim.
903                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
904                  *   but apparently a few don't get set; catch them here. */
905                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
906                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
907                         (pkt->hdr.cmd != REPLY_RX) &&
908                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
909                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
910                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
911                         (pkt->hdr.cmd != REPLY_TX);
912
913                 /* Based on type of command response or notification,
914                  *   handle those that need handling via function in
915                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
916                 if (priv->rx_handlers[pkt->hdr.cmd]) {
917                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
918                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
919                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
920                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
921                 } else {
922                         /* No handling needed */
923                         IWL_DEBUG_RX(priv,
924                                 "r %d i %d No handler needed for %s, 0x%02x\n",
925                                 r, i, get_cmd_string(pkt->hdr.cmd),
926                                 pkt->hdr.cmd);
927                 }
928
929                 /*
930                  * XXX: After here, we should always check rxb->page
931                  * against NULL before touching it or its virtual
932                  * memory (pkt). Because some rx_handler might have
933                  * already taken or freed the pages.
934                  */
935
936                 if (reclaim) {
937                         /* Invoke any callbacks, transfer the buffer to caller,
938                          * and fire off the (possibly) blocking iwl_send_cmd()
939                          * as we reclaim the driver command queue */
940                         if (rxb->page)
941                                 iwl_tx_cmd_complete(priv, rxb);
942                         else
943                                 IWL_WARN(priv, "Claim null rxb?\n");
944                 }
945
946                 /* Reuse the page if possible. For notification packets and
947                  * SKBs that fail to Rx correctly, add them back into the
948                  * rx_free list for reuse later. */
949                 spin_lock_irqsave(&rxq->lock, flags);
950                 if (rxb->page != NULL) {
951                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
952                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
953                                 PCI_DMA_FROMDEVICE);
954                         list_add_tail(&rxb->list, &rxq->rx_free);
955                         rxq->free_count++;
956                 } else
957                         list_add_tail(&rxb->list, &rxq->rx_used);
958
959                 spin_unlock_irqrestore(&rxq->lock, flags);
960
961                 i = (i + 1) & RX_QUEUE_MASK;
962                 /* If there are a lot of unused frames,
963                  * restock the Rx queue so ucode wont assert. */
964                 if (fill_rx) {
965                         count++;
966                         if (count >= 8) {
967                                 rxq->read = i;
968                                 iwlagn_rx_replenish_now(priv);
969                                 count = 0;
970                         }
971                 }
972         }
973
974         /* Backtrack one entry */
975         rxq->read = i;
976         if (fill_rx)
977                 iwlagn_rx_replenish_now(priv);
978         else
979                 iwlagn_rx_queue_restock(priv);
980 }
981
982 /* call this function to flush any scheduled tasklet */
983 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
984 {
985         /* wait to make sure we flush pending tasklet*/
986         synchronize_irq(priv->pci_dev->irq);
987         tasklet_kill(&priv->irq_tasklet);
988 }
989
990 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
991 {
992         u32 inta, handled = 0;
993         u32 inta_fh;
994         unsigned long flags;
995         u32 i;
996 #ifdef CONFIG_IWLWIFI_DEBUG
997         u32 inta_mask;
998 #endif
999
1000         spin_lock_irqsave(&priv->lock, flags);
1001
1002         /* Ack/clear/reset pending uCode interrupts.
1003          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1004          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1005         inta = iwl_read32(priv, CSR_INT);
1006         iwl_write32(priv, CSR_INT, inta);
1007
1008         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1009          * Any new interrupts that happen after this, either while we're
1010          * in this tasklet, or later, will show up in next ISR/tasklet. */
1011         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1012         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1013
1014 #ifdef CONFIG_IWLWIFI_DEBUG
1015         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1016                 /* just for debug */
1017                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1018                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1019                               inta, inta_mask, inta_fh);
1020         }
1021 #endif
1022
1023         spin_unlock_irqrestore(&priv->lock, flags);
1024
1025         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1026          * atomic, make sure that inta covers all the interrupts that
1027          * we've discovered, even if FH interrupt came in just after
1028          * reading CSR_INT. */
1029         if (inta_fh & CSR49_FH_INT_RX_MASK)
1030                 inta |= CSR_INT_BIT_FH_RX;
1031         if (inta_fh & CSR49_FH_INT_TX_MASK)
1032                 inta |= CSR_INT_BIT_FH_TX;
1033
1034         /* Now service all interrupt bits discovered above. */
1035         if (inta & CSR_INT_BIT_HW_ERR) {
1036                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1037
1038                 /* Tell the device to stop sending interrupts */
1039                 iwl_disable_interrupts(priv);
1040
1041                 priv->isr_stats.hw++;
1042                 iwl_irq_handle_error(priv);
1043
1044                 handled |= CSR_INT_BIT_HW_ERR;
1045
1046                 return;
1047         }
1048
1049 #ifdef CONFIG_IWLWIFI_DEBUG
1050         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1051                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1052                 if (inta & CSR_INT_BIT_SCD) {
1053                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1054                                       "the frame/frames.\n");
1055                         priv->isr_stats.sch++;
1056                 }
1057
1058                 /* Alive notification via Rx interrupt will do the real work */
1059                 if (inta & CSR_INT_BIT_ALIVE) {
1060                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1061                         priv->isr_stats.alive++;
1062                 }
1063         }
1064 #endif
1065         /* Safely ignore these bits for debug checks below */
1066         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1067
1068         /* HW RF KILL switch toggled */
1069         if (inta & CSR_INT_BIT_RF_KILL) {
1070                 int hw_rf_kill = 0;
1071                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1072                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1073                         hw_rf_kill = 1;
1074
1075                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1076                                 hw_rf_kill ? "disable radio" : "enable radio");
1077
1078                 priv->isr_stats.rfkill++;
1079
1080                 /* driver only loads ucode once setting the interface up.
1081                  * the driver allows loading the ucode even if the radio
1082                  * is killed. Hence update the killswitch state here. The
1083                  * rfkill handler will care about restarting if needed.
1084                  */
1085                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1086                         if (hw_rf_kill)
1087                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1088                         else
1089                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1090                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1091                 }
1092
1093                 handled |= CSR_INT_BIT_RF_KILL;
1094         }
1095
1096         /* Chip got too hot and stopped itself */
1097         if (inta & CSR_INT_BIT_CT_KILL) {
1098                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1099                 priv->isr_stats.ctkill++;
1100                 handled |= CSR_INT_BIT_CT_KILL;
1101         }
1102
1103         /* Error detected by uCode */
1104         if (inta & CSR_INT_BIT_SW_ERR) {
1105                 IWL_ERR(priv, "Microcode SW error detected. "
1106                         " Restarting 0x%X.\n", inta);
1107                 priv->isr_stats.sw++;
1108                 iwl_irq_handle_error(priv);
1109                 handled |= CSR_INT_BIT_SW_ERR;
1110         }
1111
1112         /*
1113          * uCode wakes up after power-down sleep.
1114          * Tell device about any new tx or host commands enqueued,
1115          * and about any Rx buffers made available while asleep.
1116          */
1117         if (inta & CSR_INT_BIT_WAKEUP) {
1118                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1119                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1120                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1121                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1122                 priv->isr_stats.wakeup++;
1123                 handled |= CSR_INT_BIT_WAKEUP;
1124         }
1125
1126         /* All uCode command responses, including Tx command responses,
1127          * Rx "responses" (frame-received notification), and other
1128          * notifications from uCode come through here*/
1129         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1130                 iwl_rx_handle(priv);
1131                 priv->isr_stats.rx++;
1132                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1133         }
1134
1135         /* This "Tx" DMA channel is used only for loading uCode */
1136         if (inta & CSR_INT_BIT_FH_TX) {
1137                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1138                 priv->isr_stats.tx++;
1139                 handled |= CSR_INT_BIT_FH_TX;
1140                 /* Wake up uCode load routine, now that load is complete */
1141                 priv->ucode_write_complete = 1;
1142                 wake_up_interruptible(&priv->wait_command_queue);
1143         }
1144
1145         if (inta & ~handled) {
1146                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1147                 priv->isr_stats.unhandled++;
1148         }
1149
1150         if (inta & ~(priv->inta_mask)) {
1151                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1152                          inta & ~priv->inta_mask);
1153                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1154         }
1155
1156         /* Re-enable all interrupts */
1157         /* only Re-enable if diabled by irq */
1158         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1159                 iwl_enable_interrupts(priv);
1160
1161 #ifdef CONFIG_IWLWIFI_DEBUG
1162         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1163                 inta = iwl_read32(priv, CSR_INT);
1164                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1165                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1166                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1167                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1168         }
1169 #endif
1170 }
1171
1172 /* tasklet for iwlagn interrupt */
1173 static void iwl_irq_tasklet(struct iwl_priv *priv)
1174 {
1175         u32 inta = 0;
1176         u32 handled = 0;
1177         unsigned long flags;
1178         u32 i;
1179 #ifdef CONFIG_IWLWIFI_DEBUG
1180         u32 inta_mask;
1181 #endif
1182
1183         spin_lock_irqsave(&priv->lock, flags);
1184
1185         /* Ack/clear/reset pending uCode interrupts.
1186          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1187          */
1188         /* There is a hardware bug in the interrupt mask function that some
1189          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
1190          * they are disabled in the CSR_INT_MASK register. Furthermore the
1191          * ICT interrupt handling mechanism has another bug that might cause
1192          * these unmasked interrupts fail to be detected. We workaround the
1193          * hardware bugs here by ACKing all the possible interrupts so that
1194          * interrupt coalescing can still be achieved.
1195          */
1196         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
1197
1198         inta = priv->_agn.inta;
1199
1200 #ifdef CONFIG_IWLWIFI_DEBUG
1201         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1202                 /* just for debug */
1203                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1204                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1205                                 inta, inta_mask);
1206         }
1207 #endif
1208
1209         spin_unlock_irqrestore(&priv->lock, flags);
1210
1211         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
1212         priv->_agn.inta = 0;
1213
1214         /* Now service all interrupt bits discovered above. */
1215         if (inta & CSR_INT_BIT_HW_ERR) {
1216                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1217
1218                 /* Tell the device to stop sending interrupts */
1219                 iwl_disable_interrupts(priv);
1220
1221                 priv->isr_stats.hw++;
1222                 iwl_irq_handle_error(priv);
1223
1224                 handled |= CSR_INT_BIT_HW_ERR;
1225
1226                 return;
1227         }
1228
1229 #ifdef CONFIG_IWLWIFI_DEBUG
1230         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1231                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1232                 if (inta & CSR_INT_BIT_SCD) {
1233                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1234                                       "the frame/frames.\n");
1235                         priv->isr_stats.sch++;
1236                 }
1237
1238                 /* Alive notification via Rx interrupt will do the real work */
1239                 if (inta & CSR_INT_BIT_ALIVE) {
1240                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1241                         priv->isr_stats.alive++;
1242                 }
1243         }
1244 #endif
1245         /* Safely ignore these bits for debug checks below */
1246         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1247
1248         /* HW RF KILL switch toggled */
1249         if (inta & CSR_INT_BIT_RF_KILL) {
1250                 int hw_rf_kill = 0;
1251                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1252                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1253                         hw_rf_kill = 1;
1254
1255                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1256                                 hw_rf_kill ? "disable radio" : "enable radio");
1257
1258                 priv->isr_stats.rfkill++;
1259
1260                 /* driver only loads ucode once setting the interface up.
1261                  * the driver allows loading the ucode even if the radio
1262                  * is killed. Hence update the killswitch state here. The
1263                  * rfkill handler will care about restarting if needed.
1264                  */
1265                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1266                         if (hw_rf_kill)
1267                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1268                         else
1269                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1270                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1271                 }
1272
1273                 handled |= CSR_INT_BIT_RF_KILL;
1274         }
1275
1276         /* Chip got too hot and stopped itself */
1277         if (inta & CSR_INT_BIT_CT_KILL) {
1278                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1279                 priv->isr_stats.ctkill++;
1280                 handled |= CSR_INT_BIT_CT_KILL;
1281         }
1282
1283         /* Error detected by uCode */
1284         if (inta & CSR_INT_BIT_SW_ERR) {
1285                 IWL_ERR(priv, "Microcode SW error detected. "
1286                         " Restarting 0x%X.\n", inta);
1287                 priv->isr_stats.sw++;
1288                 iwl_irq_handle_error(priv);
1289                 handled |= CSR_INT_BIT_SW_ERR;
1290         }
1291
1292         /* uCode wakes up after power-down sleep */
1293         if (inta & CSR_INT_BIT_WAKEUP) {
1294                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1295                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1296                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1297                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1298
1299                 priv->isr_stats.wakeup++;
1300
1301                 handled |= CSR_INT_BIT_WAKEUP;
1302         }
1303
1304         /* All uCode command responses, including Tx command responses,
1305          * Rx "responses" (frame-received notification), and other
1306          * notifications from uCode come through here*/
1307         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1308                         CSR_INT_BIT_RX_PERIODIC)) {
1309                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1310                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1311                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1312                         iwl_write32(priv, CSR_FH_INT_STATUS,
1313                                         CSR49_FH_INT_RX_MASK);
1314                 }
1315                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1316                         handled |= CSR_INT_BIT_RX_PERIODIC;
1317                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1318                 }
1319                 /* Sending RX interrupt require many steps to be done in the
1320                  * the device:
1321                  * 1- write interrupt to current index in ICT table.
1322                  * 2- dma RX frame.
1323                  * 3- update RX shared data to indicate last write index.
1324                  * 4- send interrupt.
1325                  * This could lead to RX race, driver could receive RX interrupt
1326                  * but the shared data changes does not reflect this;
1327                  * periodic interrupt will detect any dangling Rx activity.
1328                  */
1329
1330                 /* Disable periodic interrupt; we use it as just a one-shot. */
1331                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1332                             CSR_INT_PERIODIC_DIS);
1333                 iwl_rx_handle(priv);
1334
1335                 /*
1336                  * Enable periodic interrupt in 8 msec only if we received
1337                  * real RX interrupt (instead of just periodic int), to catch
1338                  * any dangling Rx interrupt.  If it was just the periodic
1339                  * interrupt, there was no dangling Rx activity, and no need
1340                  * to extend the periodic interrupt; one-shot is enough.
1341                  */
1342                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1343                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1344                                     CSR_INT_PERIODIC_ENA);
1345
1346                 priv->isr_stats.rx++;
1347         }
1348
1349         /* This "Tx" DMA channel is used only for loading uCode */
1350         if (inta & CSR_INT_BIT_FH_TX) {
1351                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1352                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1353                 priv->isr_stats.tx++;
1354                 handled |= CSR_INT_BIT_FH_TX;
1355                 /* Wake up uCode load routine, now that load is complete */
1356                 priv->ucode_write_complete = 1;
1357                 wake_up_interruptible(&priv->wait_command_queue);
1358         }
1359
1360         if (inta & ~handled) {
1361                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1362                 priv->isr_stats.unhandled++;
1363         }
1364
1365         if (inta & ~(priv->inta_mask)) {
1366                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1367                          inta & ~priv->inta_mask);
1368         }
1369
1370         /* Re-enable all interrupts */
1371         /* only Re-enable if diabled by irq */
1372         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1373                 iwl_enable_interrupts(priv);
1374 }
1375
1376 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
1377 #define ACK_CNT_RATIO (50)
1378 #define BA_TIMEOUT_CNT (5)
1379 #define BA_TIMEOUT_MAX (16)
1380
1381 /**
1382  * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
1383  *
1384  * When the ACK count ratio is 0 and aggregated BA timeout retries exceeding
1385  * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
1386  * operation state.
1387  */
1388 bool iwl_good_ack_health(struct iwl_priv *priv,
1389                                 struct iwl_rx_packet *pkt)
1390 {
1391         bool rc = true;
1392         int actual_ack_cnt_delta, expected_ack_cnt_delta;
1393         int ba_timeout_delta;
1394
1395         actual_ack_cnt_delta =
1396                 le32_to_cpu(pkt->u.stats.tx.actual_ack_cnt) -
1397                 le32_to_cpu(priv->_agn.statistics.tx.actual_ack_cnt);
1398         expected_ack_cnt_delta =
1399                 le32_to_cpu(pkt->u.stats.tx.expected_ack_cnt) -
1400                 le32_to_cpu(priv->_agn.statistics.tx.expected_ack_cnt);
1401         ba_timeout_delta =
1402                 le32_to_cpu(pkt->u.stats.tx.agg.ba_timeout) -
1403                 le32_to_cpu(priv->_agn.statistics.tx.agg.ba_timeout);
1404         if ((priv->_agn.agg_tids_count > 0) &&
1405             (expected_ack_cnt_delta > 0) &&
1406             (((actual_ack_cnt_delta * 100) / expected_ack_cnt_delta)
1407                 < ACK_CNT_RATIO) &&
1408             (ba_timeout_delta > BA_TIMEOUT_CNT)) {
1409                 IWL_DEBUG_RADIO(priv, "actual_ack_cnt delta = %d,"
1410                                 " expected_ack_cnt = %d\n",
1411                                 actual_ack_cnt_delta, expected_ack_cnt_delta);
1412
1413 #ifdef CONFIG_IWLWIFI_DEBUGFS
1414                 /*
1415                  * This is ifdef'ed on DEBUGFS because otherwise the
1416                  * statistics aren't available. If DEBUGFS is set but
1417                  * DEBUG is not, these will just compile out.
1418                  */
1419                 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta = %d\n",
1420                                 priv->_agn.delta_statistics.tx.rx_detected_cnt);
1421                 IWL_DEBUG_RADIO(priv,
1422                                 "ack_or_ba_timeout_collision delta = %d\n",
1423                                 priv->_agn.delta_statistics.tx.
1424                                 ack_or_ba_timeout_collision);
1425 #endif
1426                 IWL_DEBUG_RADIO(priv, "agg ba_timeout delta = %d\n",
1427                                 ba_timeout_delta);
1428                 if (!actual_ack_cnt_delta &&
1429                     (ba_timeout_delta >= BA_TIMEOUT_MAX))
1430                         rc = false;
1431         }
1432         return rc;
1433 }
1434
1435
1436 /*****************************************************************************
1437  *
1438  * sysfs attributes
1439  *
1440  *****************************************************************************/
1441
1442 #ifdef CONFIG_IWLWIFI_DEBUG
1443
1444 /*
1445  * The following adds a new attribute to the sysfs representation
1446  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
1447  * used for controlling the debug level.
1448  *
1449  * See the level definitions in iwl for details.
1450  *
1451  * The debug_level being managed using sysfs below is a per device debug
1452  * level that is used instead of the global debug level if it (the per
1453  * device debug level) is set.
1454  */
1455 static ssize_t show_debug_level(struct device *d,
1456                                 struct device_attribute *attr, char *buf)
1457 {
1458         struct iwl_priv *priv = dev_get_drvdata(d);
1459         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
1460 }
1461 static ssize_t store_debug_level(struct device *d,
1462                                 struct device_attribute *attr,
1463                                  const char *buf, size_t count)
1464 {
1465         struct iwl_priv *priv = dev_get_drvdata(d);
1466         unsigned long val;
1467         int ret;
1468
1469         ret = strict_strtoul(buf, 0, &val);
1470         if (ret)
1471                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
1472         else {
1473                 priv->debug_level = val;
1474                 if (iwl_alloc_traffic_mem(priv))
1475                         IWL_ERR(priv,
1476                                 "Not enough memory to generate traffic log\n");
1477         }
1478         return strnlen(buf, count);
1479 }
1480
1481 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
1482                         show_debug_level, store_debug_level);
1483
1484
1485 #endif /* CONFIG_IWLWIFI_DEBUG */
1486
1487
1488 static ssize_t show_temperature(struct device *d,
1489                                 struct device_attribute *attr, char *buf)
1490 {
1491         struct iwl_priv *priv = dev_get_drvdata(d);
1492
1493         if (!iwl_is_alive(priv))
1494                 return -EAGAIN;
1495
1496         return sprintf(buf, "%d\n", priv->temperature);
1497 }
1498
1499 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
1500
1501 static ssize_t show_tx_power(struct device *d,
1502                              struct device_attribute *attr, char *buf)
1503 {
1504         struct iwl_priv *priv = dev_get_drvdata(d);
1505
1506         if (!iwl_is_ready_rf(priv))
1507                 return sprintf(buf, "off\n");
1508         else
1509                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
1510 }
1511
1512 static ssize_t store_tx_power(struct device *d,
1513                               struct device_attribute *attr,
1514                               const char *buf, size_t count)
1515 {
1516         struct iwl_priv *priv = dev_get_drvdata(d);
1517         unsigned long val;
1518         int ret;
1519
1520         ret = strict_strtoul(buf, 10, &val);
1521         if (ret)
1522                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
1523         else {
1524                 ret = iwl_set_tx_power(priv, val, false);
1525                 if (ret)
1526                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
1527                                 ret);
1528                 else
1529                         ret = count;
1530         }
1531         return ret;
1532 }
1533
1534 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
1535
1536 static struct attribute *iwl_sysfs_entries[] = {
1537         &dev_attr_temperature.attr,
1538         &dev_attr_tx_power.attr,
1539 #ifdef CONFIG_IWLWIFI_DEBUG
1540         &dev_attr_debug_level.attr,
1541 #endif
1542         NULL
1543 };
1544
1545 static struct attribute_group iwl_attribute_group = {
1546         .name = NULL,           /* put in device directory */
1547         .attrs = iwl_sysfs_entries,
1548 };
1549
1550 /******************************************************************************
1551  *
1552  * uCode download functions
1553  *
1554  ******************************************************************************/
1555
1556 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1557 {
1558         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1559         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1560         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1561         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1562         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1563         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1564 }
1565
1566 static void iwl_nic_start(struct iwl_priv *priv)
1567 {
1568         /* Remove all resets to allow NIC to operate */
1569         iwl_write32(priv, CSR_RESET, 0);
1570 }
1571
1572 struct iwlagn_ucode_capabilities {
1573         u32 max_probe_length;
1574         u32 standard_phy_calibration_size;
1575         bool pan;
1576 };
1577
1578 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1579 static int iwl_mac_setup_register(struct iwl_priv *priv,
1580                                   struct iwlagn_ucode_capabilities *capa);
1581
1582 #define UCODE_EXPERIMENTAL_INDEX        100
1583 #define UCODE_EXPERIMENTAL_TAG          "exp"
1584
1585 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1586 {
1587         const char *name_pre = priv->cfg->fw_name_pre;
1588         char tag[8];
1589
1590         if (first) {
1591 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1592                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1593                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1594         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1595 #endif
1596                 priv->fw_index = priv->cfg->ucode_api_max;
1597                 sprintf(tag, "%d", priv->fw_index);
1598         } else {
1599                 priv->fw_index--;
1600                 sprintf(tag, "%d", priv->fw_index);
1601         }
1602
1603         if (priv->fw_index < priv->cfg->ucode_api_min) {
1604                 IWL_ERR(priv, "no suitable firmware found!\n");
1605                 return -ENOENT;
1606         }
1607
1608         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1609
1610         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1611                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1612                                 ? "EXPERIMENTAL " : "",
1613                        priv->firmware_name);
1614
1615         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1616                                        &priv->pci_dev->dev, GFP_KERNEL, priv,
1617                                        iwl_ucode_callback);
1618 }
1619
1620 struct iwlagn_firmware_pieces {
1621         const void *inst, *data, *init, *init_data, *boot;
1622         size_t inst_size, data_size, init_size, init_data_size, boot_size;
1623
1624         u32 build;
1625
1626         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1627         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1628 };
1629
1630 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1631                                        const struct firmware *ucode_raw,
1632                                        struct iwlagn_firmware_pieces *pieces)
1633 {
1634         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1635         u32 api_ver, hdr_size;
1636         const u8 *src;
1637
1638         priv->ucode_ver = le32_to_cpu(ucode->ver);
1639         api_ver = IWL_UCODE_API(priv->ucode_ver);
1640
1641         switch (api_ver) {
1642         default:
1643                 /*
1644                  * 4965 doesn't revision the firmware file format
1645                  * along with the API version, it always uses v1
1646                  * file format.
1647                  */
1648                 if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) !=
1649                                 CSR_HW_REV_TYPE_4965) {
1650                         hdr_size = 28;
1651                         if (ucode_raw->size < hdr_size) {
1652                                 IWL_ERR(priv, "File size too small!\n");
1653                                 return -EINVAL;
1654                         }
1655                         pieces->build = le32_to_cpu(ucode->u.v2.build);
1656                         pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1657                         pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1658                         pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1659                         pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1660                         pieces->boot_size = le32_to_cpu(ucode->u.v2.boot_size);
1661                         src = ucode->u.v2.data;
1662                         break;
1663                 }
1664                 /* fall through for 4965 */
1665         case 0:
1666         case 1:
1667         case 2:
1668                 hdr_size = 24;
1669                 if (ucode_raw->size < hdr_size) {
1670                         IWL_ERR(priv, "File size too small!\n");
1671                         return -EINVAL;
1672                 }
1673                 pieces->build = 0;
1674                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1675                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1676                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1677                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1678                 pieces->boot_size = le32_to_cpu(ucode->u.v1.boot_size);
1679                 src = ucode->u.v1.data;
1680                 break;
1681         }
1682
1683         /* Verify size of file vs. image size info in file's header */
1684         if (ucode_raw->size != hdr_size + pieces->inst_size +
1685                                 pieces->data_size + pieces->init_size +
1686                                 pieces->init_data_size + pieces->boot_size) {
1687
1688                 IWL_ERR(priv,
1689                         "uCode file size %d does not match expected size\n",
1690                         (int)ucode_raw->size);
1691                 return -EINVAL;
1692         }
1693
1694         pieces->inst = src;
1695         src += pieces->inst_size;
1696         pieces->data = src;
1697         src += pieces->data_size;
1698         pieces->init = src;
1699         src += pieces->init_size;
1700         pieces->init_data = src;
1701         src += pieces->init_data_size;
1702         pieces->boot = src;
1703         src += pieces->boot_size;
1704
1705         return 0;
1706 }
1707
1708 static int iwlagn_wanted_ucode_alternative = 1;
1709
1710 static int iwlagn_load_firmware(struct iwl_priv *priv,
1711                                 const struct firmware *ucode_raw,
1712                                 struct iwlagn_firmware_pieces *pieces,
1713                                 struct iwlagn_ucode_capabilities *capa)
1714 {
1715         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1716         struct iwl_ucode_tlv *tlv;
1717         size_t len = ucode_raw->size;
1718         const u8 *data;
1719         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1720         u64 alternatives;
1721         u32 tlv_len;
1722         enum iwl_ucode_tlv_type tlv_type;
1723         const u8 *tlv_data;
1724
1725         if (len < sizeof(*ucode)) {
1726                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1727                 return -EINVAL;
1728         }
1729
1730         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1731                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1732                         le32_to_cpu(ucode->magic));
1733                 return -EINVAL;
1734         }
1735
1736         /*
1737          * Check which alternatives are present, and "downgrade"
1738          * when the chosen alternative is not present, warning
1739          * the user when that happens. Some files may not have
1740          * any alternatives, so don't warn in that case.
1741          */
1742         alternatives = le64_to_cpu(ucode->alternatives);
1743         tmp = wanted_alternative;
1744         if (wanted_alternative > 63)
1745                 wanted_alternative = 63;
1746         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1747                 wanted_alternative--;
1748         if (wanted_alternative && wanted_alternative != tmp)
1749                 IWL_WARN(priv,
1750                          "uCode alternative %d not available, choosing %d\n",
1751                          tmp, wanted_alternative);
1752
1753         priv->ucode_ver = le32_to_cpu(ucode->ver);
1754         pieces->build = le32_to_cpu(ucode->build);
1755         data = ucode->data;
1756
1757         len -= sizeof(*ucode);
1758
1759         while (len >= sizeof(*tlv)) {
1760                 u16 tlv_alt;
1761
1762                 len -= sizeof(*tlv);
1763                 tlv = (void *)data;
1764
1765                 tlv_len = le32_to_cpu(tlv->length);
1766                 tlv_type = le16_to_cpu(tlv->type);
1767                 tlv_alt = le16_to_cpu(tlv->alternative);
1768                 tlv_data = tlv->data;
1769
1770                 if (len < tlv_len) {
1771                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1772                                 len, tlv_len);
1773                         return -EINVAL;
1774                 }
1775                 len -= ALIGN(tlv_len, 4);
1776                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1777
1778                 /*
1779                  * Alternative 0 is always valid.
1780                  *
1781                  * Skip alternative TLVs that are not selected.
1782                  */
1783                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1784                         continue;
1785
1786                 switch (tlv_type) {
1787                 case IWL_UCODE_TLV_INST:
1788                         pieces->inst = tlv_data;
1789                         pieces->inst_size = tlv_len;
1790                         break;
1791                 case IWL_UCODE_TLV_DATA:
1792                         pieces->data = tlv_data;
1793                         pieces->data_size = tlv_len;
1794                         break;
1795                 case IWL_UCODE_TLV_INIT:
1796                         pieces->init = tlv_data;
1797                         pieces->init_size = tlv_len;
1798                         break;
1799                 case IWL_UCODE_TLV_INIT_DATA:
1800                         pieces->init_data = tlv_data;
1801                         pieces->init_data_size = tlv_len;
1802                         break;
1803                 case IWL_UCODE_TLV_BOOT:
1804                         pieces->boot = tlv_data;
1805                         pieces->boot_size = tlv_len;
1806                         break;
1807                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1808                         if (tlv_len != sizeof(u32))
1809                                 goto invalid_tlv_len;
1810                         capa->max_probe_length =
1811                                         le32_to_cpup((__le32 *)tlv_data);
1812                         break;
1813                 case IWL_UCODE_TLV_PAN:
1814                         if (tlv_len)
1815                                 goto invalid_tlv_len;
1816                         capa->pan = true;
1817                         break;
1818                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1819                         if (tlv_len != sizeof(u32))
1820                                 goto invalid_tlv_len;
1821                         pieces->init_evtlog_ptr =
1822                                         le32_to_cpup((__le32 *)tlv_data);
1823                         break;
1824                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1825                         if (tlv_len != sizeof(u32))
1826                                 goto invalid_tlv_len;
1827                         pieces->init_evtlog_size =
1828                                         le32_to_cpup((__le32 *)tlv_data);
1829                         break;
1830                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1831                         if (tlv_len != sizeof(u32))
1832                                 goto invalid_tlv_len;
1833                         pieces->init_errlog_ptr =
1834                                         le32_to_cpup((__le32 *)tlv_data);
1835                         break;
1836                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1837                         if (tlv_len != sizeof(u32))
1838                                 goto invalid_tlv_len;
1839                         pieces->inst_evtlog_ptr =
1840                                         le32_to_cpup((__le32 *)tlv_data);
1841                         break;
1842                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1843                         if (tlv_len != sizeof(u32))
1844                                 goto invalid_tlv_len;
1845                         pieces->inst_evtlog_size =
1846                                         le32_to_cpup((__le32 *)tlv_data);
1847                         break;
1848                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1849                         if (tlv_len != sizeof(u32))
1850                                 goto invalid_tlv_len;
1851                         pieces->inst_errlog_ptr =
1852                                         le32_to_cpup((__le32 *)tlv_data);
1853                         break;
1854                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1855                         if (tlv_len)
1856                                 goto invalid_tlv_len;
1857                         priv->enhance_sensitivity_table = true;
1858                         break;
1859                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1860                         if (tlv_len != sizeof(u32))
1861                                 goto invalid_tlv_len;
1862                         capa->standard_phy_calibration_size =
1863                                         le32_to_cpup((__le32 *)tlv_data);
1864                         break;
1865                 default:
1866                         IWL_WARN(priv, "unknown TLV: %d\n", tlv_type);
1867                         break;
1868                 }
1869         }
1870
1871         if (len) {
1872                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1873                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1874                 return -EINVAL;
1875         }
1876
1877         return 0;
1878
1879  invalid_tlv_len:
1880         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1881         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1882
1883         return -EINVAL;
1884 }
1885
1886 /**
1887  * iwl_ucode_callback - callback when firmware was loaded
1888  *
1889  * If loaded successfully, copies the firmware into buffers
1890  * for the card to fetch (via DMA).
1891  */
1892 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1893 {
1894         struct iwl_priv *priv = context;
1895         struct iwl_ucode_header *ucode;
1896         int err;
1897         struct iwlagn_firmware_pieces pieces;
1898         const unsigned int api_max = priv->cfg->ucode_api_max;
1899         const unsigned int api_min = priv->cfg->ucode_api_min;
1900         u32 api_ver;
1901         char buildstr[25];
1902         u32 build;
1903         struct iwlagn_ucode_capabilities ucode_capa = {
1904                 .max_probe_length = 200,
1905                 .standard_phy_calibration_size =
1906                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1907         };
1908
1909         memset(&pieces, 0, sizeof(pieces));
1910
1911         if (!ucode_raw) {
1912                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1913                         IWL_ERR(priv,
1914                                 "request for firmware file '%s' failed.\n",
1915                                 priv->firmware_name);
1916                 goto try_again;
1917         }
1918
1919         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1920                        priv->firmware_name, ucode_raw->size);
1921
1922         /* Make sure that we got at least the API version number */
1923         if (ucode_raw->size < 4) {
1924                 IWL_ERR(priv, "File size way too small!\n");
1925                 goto try_again;
1926         }
1927
1928         /* Data from ucode file:  header followed by uCode images */
1929         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1930
1931         if (ucode->ver)
1932                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1933         else
1934                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1935                                            &ucode_capa);
1936
1937         if (err)
1938                 goto try_again;
1939
1940         api_ver = IWL_UCODE_API(priv->ucode_ver);
1941         build = pieces.build;
1942
1943         /*
1944          * api_ver should match the api version forming part of the
1945          * firmware filename ... but we don't check for that and only rely
1946          * on the API version read from firmware header from here on forward
1947          */
1948         /* no api version check required for experimental uCode */
1949         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1950                 if (api_ver < api_min || api_ver > api_max) {
1951                         IWL_ERR(priv,
1952                                 "Driver unable to support your firmware API. "
1953                                 "Driver supports v%u, firmware is v%u.\n",
1954                                 api_max, api_ver);
1955                         goto try_again;
1956                 }
1957
1958                 if (api_ver != api_max)
1959                         IWL_ERR(priv,
1960                                 "Firmware has old API version. Expected v%u, "
1961                                 "got v%u. New firmware can be obtained "
1962                                 "from http://www.intellinuxwireless.org.\n",
1963                                 api_max, api_ver);
1964         }
1965
1966         if (build)
1967                 sprintf(buildstr, " build %u%s", build,
1968                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1969                                 ? " (EXP)" : "");
1970         else
1971                 buildstr[0] = '\0';
1972
1973         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1974                  IWL_UCODE_MAJOR(priv->ucode_ver),
1975                  IWL_UCODE_MINOR(priv->ucode_ver),
1976                  IWL_UCODE_API(priv->ucode_ver),
1977                  IWL_UCODE_SERIAL(priv->ucode_ver),
1978                  buildstr);
1979
1980         snprintf(priv->hw->wiphy->fw_version,
1981                  sizeof(priv->hw->wiphy->fw_version),
1982                  "%u.%u.%u.%u%s",
1983                  IWL_UCODE_MAJOR(priv->ucode_ver),
1984                  IWL_UCODE_MINOR(priv->ucode_ver),
1985                  IWL_UCODE_API(priv->ucode_ver),
1986                  IWL_UCODE_SERIAL(priv->ucode_ver),
1987                  buildstr);
1988
1989         /*
1990          * For any of the failures below (before allocating pci memory)
1991          * we will try to load a version with a smaller API -- maybe the
1992          * user just got a corrupted version of the latest API.
1993          */
1994
1995         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1996                        priv->ucode_ver);
1997         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1998                        pieces.inst_size);
1999         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
2000                        pieces.data_size);
2001         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
2002                        pieces.init_size);
2003         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
2004                        pieces.init_data_size);
2005         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %Zd\n",
2006                        pieces.boot_size);
2007
2008         /* Verify that uCode images will fit in card's SRAM */
2009         if (pieces.inst_size > priv->hw_params.max_inst_size) {
2010                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
2011                         pieces.inst_size);
2012                 goto try_again;
2013         }
2014
2015         if (pieces.data_size > priv->hw_params.max_data_size) {
2016                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
2017                         pieces.data_size);
2018                 goto try_again;
2019         }
2020
2021         if (pieces.init_size > priv->hw_params.max_inst_size) {
2022                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
2023                         pieces.init_size);
2024                 goto try_again;
2025         }
2026
2027         if (pieces.init_data_size > priv->hw_params.max_data_size) {
2028                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
2029                         pieces.init_data_size);
2030                 goto try_again;
2031         }
2032
2033         if (pieces.boot_size > priv->hw_params.max_bsm_size) {
2034                 IWL_ERR(priv, "uCode boot instr len %Zd too large to fit in\n",
2035                         pieces.boot_size);
2036                 goto try_again;
2037         }
2038
2039         /* Allocate ucode buffers for card's bus-master loading ... */
2040
2041         /* Runtime instructions and 2 copies of data:
2042          * 1) unmodified from disk
2043          * 2) backup cache for save/restore during power-downs */
2044         priv->ucode_code.len = pieces.inst_size;
2045         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2046
2047         priv->ucode_data.len = pieces.data_size;
2048         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2049
2050         priv->ucode_data_backup.len = pieces.data_size;
2051         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2052
2053         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2054             !priv->ucode_data_backup.v_addr)
2055                 goto err_pci_alloc;
2056
2057         /* Initialization instructions and data */
2058         if (pieces.init_size && pieces.init_data_size) {
2059                 priv->ucode_init.len = pieces.init_size;
2060                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2061
2062                 priv->ucode_init_data.len = pieces.init_data_size;
2063                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2064
2065                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2066                         goto err_pci_alloc;
2067         }
2068
2069         /* Bootstrap (instructions only, no data) */
2070         if (pieces.boot_size) {
2071                 priv->ucode_boot.len = pieces.boot_size;
2072                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2073
2074                 if (!priv->ucode_boot.v_addr)
2075                         goto err_pci_alloc;
2076         }
2077
2078         /* Now that we can no longer fail, copy information */
2079
2080         /*
2081          * The (size - 16) / 12 formula is based on the information recorded
2082          * for each event, which is of mode 1 (including timestamp) for all
2083          * new microcodes that include this information.
2084          */
2085         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
2086         if (pieces.init_evtlog_size)
2087                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
2088         else
2089                 priv->_agn.init_evtlog_size =
2090                         priv->cfg->base_params->max_event_log_size;
2091         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
2092         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
2093         if (pieces.inst_evtlog_size)
2094                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
2095         else
2096                 priv->_agn.inst_evtlog_size =
2097                         priv->cfg->base_params->max_event_log_size;
2098         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
2099
2100         if (ucode_capa.pan) {
2101                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
2102                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
2103         } else
2104                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
2105
2106         /* Copy images into buffers for card's bus-master reads ... */
2107
2108         /* Runtime instructions (first block of data in file) */
2109         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n",
2110                         pieces.inst_size);
2111         memcpy(priv->ucode_code.v_addr, pieces.inst, pieces.inst_size);
2112
2113         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2114                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2115
2116         /*
2117          * Runtime data
2118          * NOTE:  Copy into backup buffer will be done in iwl_up()
2119          */
2120         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n",
2121                         pieces.data_size);
2122         memcpy(priv->ucode_data.v_addr, pieces.data, pieces.data_size);
2123         memcpy(priv->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
2124
2125         /* Initialization instructions */
2126         if (pieces.init_size) {
2127                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
2128                                 pieces.init_size);
2129                 memcpy(priv->ucode_init.v_addr, pieces.init, pieces.init_size);
2130         }
2131
2132         /* Initialization data */
2133         if (pieces.init_data_size) {
2134                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
2135                                pieces.init_data_size);
2136                 memcpy(priv->ucode_init_data.v_addr, pieces.init_data,
2137                        pieces.init_data_size);
2138         }
2139
2140         /* Bootstrap instructions */
2141         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n",
2142                         pieces.boot_size);
2143         memcpy(priv->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
2144
2145         /*
2146          * figure out the offset of chain noise reset and gain commands
2147          * base on the size of standard phy calibration commands table size
2148          */
2149         if (ucode_capa.standard_phy_calibration_size >
2150             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
2151                 ucode_capa.standard_phy_calibration_size =
2152                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
2153
2154         priv->_agn.phy_calib_chain_noise_reset_cmd =
2155                 ucode_capa.standard_phy_calibration_size;
2156         priv->_agn.phy_calib_chain_noise_gain_cmd =
2157                 ucode_capa.standard_phy_calibration_size + 1;
2158
2159         /**************************************************
2160          * This is still part of probe() in a sense...
2161          *
2162          * 9. Setup and register with mac80211 and debugfs
2163          **************************************************/
2164         err = iwl_mac_setup_register(priv, &ucode_capa);
2165         if (err)
2166                 goto out_unbind;
2167
2168         err = iwl_dbgfs_register(priv, DRV_NAME);
2169         if (err)
2170                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
2171
2172         err = sysfs_create_group(&priv->pci_dev->dev.kobj,
2173                                         &iwl_attribute_group);
2174         if (err) {
2175                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
2176                 goto out_unbind;
2177         }
2178
2179         /* We have our copies now, allow OS release its copies */
2180         release_firmware(ucode_raw);
2181         complete(&priv->_agn.firmware_loading_complete);
2182         return;
2183
2184  try_again:
2185         /* try next, if any */
2186         if (iwl_request_firmware(priv, false))
2187                 goto out_unbind;
2188         release_firmware(ucode_raw);
2189         return;
2190
2191  err_pci_alloc:
2192         IWL_ERR(priv, "failed to allocate pci memory\n");
2193         iwl_dealloc_ucode_pci(priv);
2194  out_unbind:
2195         complete(&priv->_agn.firmware_loading_complete);
2196         device_release_driver(&priv->pci_dev->dev);
2197         release_firmware(ucode_raw);
2198 }
2199
2200 static const char *desc_lookup_text[] = {
2201         "OK",
2202         "FAIL",
2203         "BAD_PARAM",
2204         "BAD_CHECKSUM",
2205         "NMI_INTERRUPT_WDG",
2206         "SYSASSERT",
2207         "FATAL_ERROR",
2208         "BAD_COMMAND",
2209         "HW_ERROR_TUNE_LOCK",
2210         "HW_ERROR_TEMPERATURE",
2211         "ILLEGAL_CHAN_FREQ",
2212         "VCC_NOT_STABLE",
2213         "FH_ERROR",
2214         "NMI_INTERRUPT_HOST",
2215         "NMI_INTERRUPT_ACTION_PT",
2216         "NMI_INTERRUPT_UNKNOWN",
2217         "UCODE_VERSION_MISMATCH",
2218         "HW_ERROR_ABS_LOCK",
2219         "HW_ERROR_CAL_LOCK_FAIL",
2220         "NMI_INTERRUPT_INST_ACTION_PT",
2221         "NMI_INTERRUPT_DATA_ACTION_PT",
2222         "NMI_TRM_HW_ER",
2223         "NMI_INTERRUPT_TRM",
2224         "NMI_INTERRUPT_BREAK_POINT"
2225         "DEBUG_0",
2226         "DEBUG_1",
2227         "DEBUG_2",
2228         "DEBUG_3",
2229 };
2230
2231 static struct { char *name; u8 num; } advanced_lookup[] = {
2232         { "NMI_INTERRUPT_WDG", 0x34 },
2233         { "SYSASSERT", 0x35 },
2234         { "UCODE_VERSION_MISMATCH", 0x37 },
2235         { "BAD_COMMAND", 0x38 },
2236         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
2237         { "FATAL_ERROR", 0x3D },
2238         { "NMI_TRM_HW_ERR", 0x46 },
2239         { "NMI_INTERRUPT_TRM", 0x4C },
2240         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
2241         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
2242         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
2243         { "NMI_INTERRUPT_HOST", 0x66 },
2244         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
2245         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
2246         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
2247         { "ADVANCED_SYSASSERT", 0 },
2248 };
2249
2250 static const char *desc_lookup(u32 num)
2251 {
2252         int i;
2253         int max = ARRAY_SIZE(desc_lookup_text);
2254
2255         if (num < max)
2256                 return desc_lookup_text[num];
2257
2258         max = ARRAY_SIZE(advanced_lookup) - 1;
2259         for (i = 0; i < max; i++) {
2260                 if (advanced_lookup[i].num == num)
2261                         break;;
2262         }
2263         return advanced_lookup[i].name;
2264 }
2265
2266 #define ERROR_START_OFFSET  (1 * sizeof(u32))
2267 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
2268
2269 void iwl_dump_nic_error_log(struct iwl_priv *priv)
2270 {
2271         u32 data2, line;
2272         u32 desc, time, count, base, data1;
2273         u32 blink1, blink2, ilink1, ilink2;
2274         u32 pc, hcmd;
2275
2276         if (priv->ucode_type == UCODE_INIT) {
2277                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
2278                 if (!base)
2279                         base = priv->_agn.init_errlog_ptr;
2280         } else {
2281                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
2282                 if (!base)
2283                         base = priv->_agn.inst_errlog_ptr;
2284         }
2285
2286         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2287                 IWL_ERR(priv,
2288                         "Not valid error log pointer 0x%08X for %s uCode\n",
2289                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
2290                 return;
2291         }
2292
2293         count = iwl_read_targ_mem(priv, base);
2294
2295         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
2296                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
2297                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
2298                         priv->status, count);
2299         }
2300
2301         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
2302         priv->isr_stats.err_code = desc;
2303         pc = iwl_read_targ_mem(priv, base + 2 * sizeof(u32));
2304         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
2305         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
2306         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
2307         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
2308         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
2309         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
2310         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
2311         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
2312         hcmd = iwl_read_targ_mem(priv, base + 22 * sizeof(u32));
2313
2314         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
2315                                       blink1, blink2, ilink1, ilink2);
2316
2317         IWL_ERR(priv, "Desc                                  Time       "
2318                 "data1      data2      line\n");
2319         IWL_ERR(priv, "%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
2320                 desc_lookup(desc), desc, time, data1, data2, line);
2321         IWL_ERR(priv, "pc      blink1  blink2  ilink1  ilink2  hcmd\n");
2322         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n",
2323                 pc, blink1, blink2, ilink1, ilink2, hcmd);
2324 }
2325
2326 #define EVENT_START_OFFSET  (4 * sizeof(u32))
2327
2328 /**
2329  * iwl_print_event_log - Dump error event log to syslog
2330  *
2331  */
2332 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
2333                                u32 num_events, u32 mode,
2334                                int pos, char **buf, size_t bufsz)
2335 {
2336         u32 i;
2337         u32 base;       /* SRAM byte address of event log header */
2338         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
2339         u32 ptr;        /* SRAM byte address of log data */
2340         u32 ev, time, data; /* event log data */
2341         unsigned long reg_flags;
2342
2343         if (num_events == 0)
2344                 return pos;
2345
2346         if (priv->ucode_type == UCODE_INIT) {
2347                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2348                 if (!base)
2349                         base = priv->_agn.init_evtlog_ptr;
2350         } else {
2351                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2352                 if (!base)
2353                         base = priv->_agn.inst_evtlog_ptr;
2354         }
2355
2356         if (mode == 0)
2357                 event_size = 2 * sizeof(u32);
2358         else
2359                 event_size = 3 * sizeof(u32);
2360
2361         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
2362
2363         /* Make sure device is powered up for SRAM reads */
2364         spin_lock_irqsave(&priv->reg_lock, reg_flags);
2365         iwl_grab_nic_access(priv);
2366
2367         /* Set starting address; reads will auto-increment */
2368         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
2369         rmb();
2370
2371         /* "time" is actually "data" for mode 0 (no timestamp).
2372         * place event id # at far right for easier visual parsing. */
2373         for (i = 0; i < num_events; i++) {
2374                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2375                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2376                 if (mode == 0) {
2377                         /* data, ev */
2378                         if (bufsz) {
2379                                 pos += scnprintf(*buf + pos, bufsz - pos,
2380                                                 "EVT_LOG:0x%08x:%04u\n",
2381                                                 time, ev);
2382                         } else {
2383                                 trace_iwlwifi_dev_ucode_event(priv, 0,
2384                                         time, ev);
2385                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
2386                                         time, ev);
2387                         }
2388                 } else {
2389                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2390                         if (bufsz) {
2391                                 pos += scnprintf(*buf + pos, bufsz - pos,
2392                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
2393                                                  time, data, ev);
2394                         } else {
2395                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
2396                                         time, data, ev);
2397                                 trace_iwlwifi_dev_ucode_event(priv, time,
2398                                         data, ev);
2399                         }
2400                 }
2401         }
2402
2403         /* Allow device to power down */
2404         iwl_release_nic_access(priv);
2405         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
2406         return pos;
2407 }
2408
2409 /**
2410  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
2411  */
2412 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
2413                                     u32 num_wraps, u32 next_entry,
2414                                     u32 size, u32 mode,
2415                                     int pos, char **buf, size_t bufsz)
2416 {
2417         /*
2418          * display the newest DEFAULT_LOG_ENTRIES entries
2419          * i.e the entries just before the next ont that uCode would fill.
2420          */
2421         if (num_wraps) {
2422                 if (next_entry < size) {
2423                         pos = iwl_print_event_log(priv,
2424                                                 capacity - (size - next_entry),
2425                                                 size - next_entry, mode,
2426                                                 pos, buf, bufsz);
2427                         pos = iwl_print_event_log(priv, 0,
2428                                                   next_entry, mode,
2429                                                   pos, buf, bufsz);
2430                 } else
2431                         pos = iwl_print_event_log(priv, next_entry - size,
2432                                                   size, mode, pos, buf, bufsz);
2433         } else {
2434                 if (next_entry < size) {
2435                         pos = iwl_print_event_log(priv, 0, next_entry,
2436                                                   mode, pos, buf, bufsz);
2437                 } else {
2438                         pos = iwl_print_event_log(priv, next_entry - size,
2439                                                   size, mode, pos, buf, bufsz);
2440                 }
2441         }
2442         return pos;
2443 }
2444
2445 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
2446
2447 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
2448                             char **buf, bool display)
2449 {
2450         u32 base;       /* SRAM byte address of event log header */
2451         u32 capacity;   /* event log capacity in # entries */
2452         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2453         u32 num_wraps;  /* # times uCode wrapped to top of log */
2454         u32 next_entry; /* index of next entry to be written by uCode */
2455         u32 size;       /* # entries that we'll print */
2456         u32 logsize;
2457         int pos = 0;
2458         size_t bufsz = 0;
2459
2460         if (priv->ucode_type == UCODE_INIT) {
2461                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2462                 logsize = priv->_agn.init_evtlog_size;
2463                 if (!base)
2464                         base = priv->_agn.init_evtlog_ptr;
2465         } else {
2466                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2467                 logsize = priv->_agn.inst_evtlog_size;
2468                 if (!base)
2469                         base = priv->_agn.inst_evtlog_ptr;
2470         }
2471
2472         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2473                 IWL_ERR(priv,
2474                         "Invalid event log pointer 0x%08X for %s uCode\n",
2475                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
2476                 return -EINVAL;
2477         }
2478
2479         /* event log header */
2480         capacity = iwl_read_targ_mem(priv, base);
2481         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2482         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2483         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2484
2485         if (capacity > logsize) {
2486                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
2487                         capacity, logsize);
2488                 capacity = logsize;
2489         }
2490
2491         if (next_entry > logsize) {
2492                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2493                         next_entry, logsize);
2494                 next_entry = logsize;
2495         }
2496
2497         size = num_wraps ? capacity : next_entry;
2498
2499         /* bail out if nothing in log */
2500         if (size == 0) {
2501                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2502                 return pos;
2503         }
2504
2505         /* enable/disable bt channel inhibition */
2506         priv->bt_ch_announce = iwlagn_bt_ch_announce;
2507
2508 #ifdef CONFIG_IWLWIFI_DEBUG
2509         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2510                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2511                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2512 #else
2513         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2514                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2515 #endif
2516         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2517                 size);
2518
2519 #ifdef CONFIG_IWLWIFI_DEBUG
2520         if (display) {
2521                 if (full_log)
2522                         bufsz = capacity * 48;
2523                 else
2524                         bufsz = size * 48;
2525                 *buf = kmalloc(bufsz, GFP_KERNEL);
2526                 if (!*buf)
2527                         return -ENOMEM;
2528         }
2529         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2530                 /*
2531                  * if uCode has wrapped back to top of log,
2532                  * start at the oldest entry,
2533                  * i.e the next one that uCode would fill.
2534                  */
2535                 if (num_wraps)
2536                         pos = iwl_print_event_log(priv, next_entry,
2537                                                 capacity - next_entry, mode,
2538                                                 pos, buf, bufsz);
2539                 /* (then/else) start at top of log */
2540                 pos = iwl_print_event_log(priv, 0,
2541                                           next_entry, mode, pos, buf, bufsz);
2542         } else
2543                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2544                                                 next_entry, size, mode,
2545                                                 pos, buf, bufsz);
2546 #else
2547         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2548                                         next_entry, size, mode,
2549                                         pos, buf, bufsz);
2550 #endif
2551         return pos;
2552 }
2553
2554 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2555 {
2556         struct iwl_ct_kill_config cmd;
2557         struct iwl_ct_kill_throttling_config adv_cmd;
2558         unsigned long flags;
2559         int ret = 0;
2560
2561         spin_lock_irqsave(&priv->lock, flags);
2562         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2563                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2564         spin_unlock_irqrestore(&priv->lock, flags);
2565         priv->thermal_throttle.ct_kill_toggle = false;
2566
2567         if (priv->cfg->base_params->support_ct_kill_exit) {
2568                 adv_cmd.critical_temperature_enter =
2569                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2570                 adv_cmd.critical_temperature_exit =
2571                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2572
2573                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2574                                        sizeof(adv_cmd), &adv_cmd);
2575                 if (ret)
2576                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2577                 else
2578                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2579                                         "succeeded, "
2580                                         "critical temperature enter is %d,"
2581                                         "exit is %d\n",
2582                                        priv->hw_params.ct_kill_threshold,
2583                                        priv->hw_params.ct_kill_exit_threshold);
2584         } else {
2585                 cmd.critical_temperature_R =
2586                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2587
2588                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2589                                        sizeof(cmd), &cmd);
2590                 if (ret)
2591                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2592                 else
2593                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2594                                         "succeeded, "
2595                                         "critical temperature is %d\n",
2596                                         priv->hw_params.ct_kill_threshold);
2597         }
2598 }
2599
2600 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
2601 {
2602         struct iwl_calib_cfg_cmd calib_cfg_cmd;
2603         struct iwl_host_cmd cmd = {
2604                 .id = CALIBRATION_CFG_CMD,
2605                 .len = sizeof(struct iwl_calib_cfg_cmd),
2606                 .data = &calib_cfg_cmd,
2607         };
2608
2609         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
2610         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
2611         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
2612
2613         return iwl_send_cmd(priv, &cmd);
2614 }
2615
2616
2617 /**
2618  * iwl_alive_start - called after REPLY_ALIVE notification received
2619  *                   from protocol/runtime uCode (initialization uCode's
2620  *                   Alive gets handled by iwl_init_alive_start()).
2621  */
2622 static void iwl_alive_start(struct iwl_priv *priv)
2623 {
2624         int ret = 0;
2625         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2626
2627         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2628
2629         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2630                 /* We had an error bringing up the hardware, so take it
2631                  * all the way back down so we can try again */
2632                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2633                 goto restart;
2634         }
2635
2636         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2637          * This is a paranoid check, because we would not have gotten the
2638          * "runtime" alive if code weren't properly loaded.  */
2639         if (iwl_verify_ucode(priv)) {
2640                 /* Runtime instruction load was bad;
2641                  * take it all the way back down so we can try again */
2642                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2643                 goto restart;
2644         }
2645
2646         ret = priv->cfg->ops->lib->alive_notify(priv);
2647         if (ret) {
2648                 IWL_WARN(priv,
2649                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2650                 goto restart;
2651         }
2652
2653
2654         /* After the ALIVE response, we can send host commands to the uCode */
2655         set_bit(STATUS_ALIVE, &priv->status);
2656
2657         /* Enable watchdog to monitor the driver tx queues */
2658         iwl_setup_watchdog(priv);
2659
2660         if (iwl_is_rfkill(priv))
2661                 return;
2662
2663         /* download priority table before any calibration request */
2664         if (priv->cfg->bt_params &&
2665             priv->cfg->bt_params->advanced_bt_coexist) {
2666                 /* Configure Bluetooth device coexistence support */
2667                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2668                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2669                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2670                 priv->cfg->ops->hcmd->send_bt_config(priv);
2671                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2672                 iwlagn_send_prio_tbl(priv);
2673
2674                 /* FIXME: w/a to force change uCode BT state machine */
2675                 iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2676                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2677                 iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2678                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2679         }
2680         if (priv->hw_params.calib_rt_cfg)
2681                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2682
2683         ieee80211_wake_queues(priv->hw);
2684
2685         priv->active_rate = IWL_RATES_MASK;
2686
2687         /* Configure Tx antenna selection based on H/W config */
2688         if (priv->cfg->ops->hcmd->set_tx_ant)
2689                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2690
2691         if (iwl_is_associated_ctx(ctx)) {
2692                 struct iwl_rxon_cmd *active_rxon =
2693                                 (struct iwl_rxon_cmd *)&ctx->active;
2694                 /* apply any changes in staging */
2695                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2696                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2697         } else {
2698                 struct iwl_rxon_context *tmp;
2699                 /* Initialize our rx_config data */
2700                 for_each_context(priv, tmp)
2701                         iwl_connection_init_rx_config(priv, tmp);
2702
2703                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2704                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2705         }
2706
2707         if (priv->cfg->bt_params &&
2708             !priv->cfg->bt_params->advanced_bt_coexist) {
2709                 /* Configure Bluetooth device coexistence support */
2710                 priv->cfg->ops->hcmd->send_bt_config(priv);
2711         }
2712
2713         iwl_reset_run_time_calib(priv);
2714
2715         set_bit(STATUS_READY, &priv->status);
2716
2717         /* Configure the adapter for unassociated operation */
2718         iwlcore_commit_rxon(priv, ctx);
2719
2720         /* At this point, the NIC is initialized and operational */
2721         iwl_rf_kill_ct_config(priv);
2722
2723         iwl_leds_init(priv);
2724
2725         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2726         wake_up_interruptible(&priv->wait_command_queue);
2727
2728         iwl_power_update_mode(priv, true);
2729         IWL_DEBUG_INFO(priv, "Updated power mode\n");
2730
2731
2732         return;
2733
2734  restart:
2735         queue_work(priv->workqueue, &priv->restart);
2736 }
2737
2738 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2739
2740 static void __iwl_down(struct iwl_priv *priv)
2741 {
2742         unsigned long flags;
2743         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2744
2745         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2746
2747         iwl_scan_cancel_timeout(priv, 200);
2748
2749         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2750
2751         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2752          * to prevent rearm timer */
2753         del_timer_sync(&priv->watchdog);
2754
2755         iwl_clear_ucode_stations(priv, NULL);
2756         iwl_dealloc_bcast_stations(priv);
2757         iwl_clear_driver_stations(priv);
2758
2759         /* reset BT coex data */
2760         priv->bt_status = 0;
2761         if (priv->cfg->bt_params)
2762                 priv->bt_traffic_load =
2763                          priv->cfg->bt_params->bt_init_traffic_load;
2764         else
2765                 priv->bt_traffic_load = 0;
2766         priv->bt_sco_active = false;
2767         priv->bt_full_concurrent = false;
2768         priv->bt_ci_compliance = 0;
2769
2770         /* Unblock any waiting calls */
2771         wake_up_interruptible_all(&priv->wait_command_queue);
2772
2773         /* Wipe out the EXIT_PENDING status bit if we are not actually
2774          * exiting the module */
2775         if (!exit_pending)
2776                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2777
2778         /* stop and reset the on-board processor */
2779         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2780
2781         /* tell the device to stop sending interrupts */
2782         spin_lock_irqsave(&priv->lock, flags);
2783         iwl_disable_interrupts(priv);
2784         spin_unlock_irqrestore(&priv->lock, flags);
2785         iwl_synchronize_irq(priv);
2786
2787         if (priv->mac80211_registered)
2788                 ieee80211_stop_queues(priv->hw);
2789
2790         /* If we have not previously called iwl_init() then
2791          * clear all bits but the RF Kill bit and return */
2792         if (!iwl_is_init(priv)) {
2793                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2794                                         STATUS_RF_KILL_HW |
2795                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2796                                         STATUS_GEO_CONFIGURED |
2797                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2798                                         STATUS_EXIT_PENDING;
2799                 goto exit;
2800         }
2801
2802         /* ...otherwise clear out all the status bits but the RF Kill
2803          * bit and continue taking the NIC down. */
2804         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2805                                 STATUS_RF_KILL_HW |
2806                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2807                                 STATUS_GEO_CONFIGURED |
2808                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2809                                 STATUS_FW_ERROR |
2810                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2811                                 STATUS_EXIT_PENDING;
2812
2813         /* device going down, Stop using ICT table */
2814         if (priv->cfg->ops->lib->isr_ops.disable)
2815                 priv->cfg->ops->lib->isr_ops.disable(priv);
2816
2817         iwlagn_txq_ctx_stop(priv);
2818         iwlagn_rxq_stop(priv);
2819
2820         /* Power-down device's busmaster DMA clocks */
2821         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2822         udelay(5);
2823
2824         /* Make sure (redundant) we've released our request to stay awake */
2825         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2826
2827         /* Stop the device, and put it in low power state */
2828         iwl_apm_stop(priv);
2829
2830  exit:
2831         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2832
2833         dev_kfree_skb(priv->beacon_skb);
2834         priv->beacon_skb = NULL;
2835
2836         /* clear out any free frames */
2837         iwl_clear_free_frames(priv);
2838 }
2839
2840 static void iwl_down(struct iwl_priv *priv)
2841 {
2842         mutex_lock(&priv->mutex);
2843         __iwl_down(priv);
2844         mutex_unlock(&priv->mutex);
2845
2846         iwl_cancel_deferred_work(priv);
2847 }
2848
2849 #define HW_READY_TIMEOUT (50)
2850
2851 static int iwl_set_hw_ready(struct iwl_priv *priv)
2852 {
2853         int ret = 0;
2854
2855         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2856                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2857
2858         /* See if we got it */
2859         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2860                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2861                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2862                                 HW_READY_TIMEOUT);
2863         if (ret != -ETIMEDOUT)
2864                 priv->hw_ready = true;
2865         else
2866                 priv->hw_ready = false;
2867
2868         IWL_DEBUG_INFO(priv, "hardware %s\n",
2869                       (priv->hw_ready == 1) ? "ready" : "not ready");
2870         return ret;
2871 }
2872
2873 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2874 {
2875         int ret = 0;
2876
2877         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2878
2879         ret = iwl_set_hw_ready(priv);
2880         if (priv->hw_ready)
2881                 return ret;
2882
2883         /* If HW is not ready, prepare the conditions to check again */
2884         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2885                         CSR_HW_IF_CONFIG_REG_PREPARE);
2886
2887         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2888                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2889                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2890
2891         /* HW should be ready by now, check again. */
2892         if (ret != -ETIMEDOUT)
2893                 iwl_set_hw_ready(priv);
2894
2895         return ret;
2896 }
2897
2898 #define MAX_HW_RESTARTS 5
2899
2900 static int __iwl_up(struct iwl_priv *priv)
2901 {
2902         struct iwl_rxon_context *ctx;
2903         int i;
2904         int ret;
2905
2906         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2907                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2908                 return -EIO;
2909         }
2910
2911         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2912                 IWL_ERR(priv, "ucode not available for device bringup\n");
2913                 return -EIO;
2914         }
2915
2916         for_each_context(priv, ctx) {
2917                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2918                 if (ret) {
2919                         iwl_dealloc_bcast_stations(priv);
2920                         return ret;
2921                 }
2922         }
2923
2924         iwl_prepare_card_hw(priv);
2925
2926         if (!priv->hw_ready) {
2927                 IWL_WARN(priv, "Exit HW not ready\n");
2928                 return -EIO;
2929         }
2930
2931         /* If platform's RF_KILL switch is NOT set to KILL */
2932         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2933                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2934         else
2935                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2936
2937         if (iwl_is_rfkill(priv)) {
2938                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2939
2940                 iwl_enable_interrupts(priv);
2941                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2942                 return 0;
2943         }
2944
2945         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2946
2947         /* must be initialised before iwl_hw_nic_init */
2948         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
2949                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
2950         else
2951                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
2952
2953         ret = iwlagn_hw_nic_init(priv);
2954         if (ret) {
2955                 IWL_ERR(priv, "Unable to init nic\n");
2956                 return ret;
2957         }
2958
2959         /* make sure rfkill handshake bits are cleared */
2960         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2961         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2962                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2963
2964         /* clear (again), then enable host interrupts */
2965         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2966         iwl_enable_interrupts(priv);
2967
2968         /* really make sure rfkill handshake bits are cleared */
2969         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2970         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2971
2972         /* Copy original ucode data image from disk into backup cache.
2973          * This will be used to initialize the on-board processor's
2974          * data SRAM for a clean start when the runtime program first loads. */
2975         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2976                priv->ucode_data.len);
2977
2978         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2979
2980                 /* load bootstrap state machine,
2981                  * load bootstrap program into processor's memory,
2982                  * prepare to load the "initialize" uCode */
2983                 ret = priv->cfg->ops->lib->load_ucode(priv);
2984
2985                 if (ret) {
2986                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2987                                 ret);
2988                         continue;
2989                 }
2990
2991                 /* start card; "initialize" will load runtime ucode */
2992                 iwl_nic_start(priv);
2993
2994                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2995
2996                 return 0;
2997         }
2998
2999         set_bit(STATUS_EXIT_PENDING, &priv->status);
3000         __iwl_down(priv);
3001         clear_bit(STATUS_EXIT_PENDING, &priv->status);
3002
3003         /* tried to restart and config the device for as long as our
3004          * patience could withstand */
3005         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
3006         return -EIO;
3007 }
3008
3009
3010 /*****************************************************************************
3011  *
3012  * Workqueue callbacks
3013  *
3014  *****************************************************************************/
3015
3016 static void iwl_bg_init_alive_start(struct work_struct *data)
3017 {
3018         struct iwl_priv *priv =
3019             container_of(data, struct iwl_priv, init_alive_start.work);
3020
3021         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3022                 return;
3023
3024         mutex_lock(&priv->mutex);
3025         priv->cfg->ops->lib->init_alive_start(priv);
3026         mutex_unlock(&priv->mutex);
3027 }
3028
3029 static void iwl_bg_alive_start(struct work_struct *data)
3030 {
3031         struct iwl_priv *priv =
3032             container_of(data, struct iwl_priv, alive_start.work);
3033
3034         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3035                 return;
3036
3037         /* enable dram interrupt */
3038         if (priv->cfg->ops->lib->isr_ops.reset)
3039                 priv->cfg->ops->lib->isr_ops.reset(priv);
3040
3041         mutex_lock(&priv->mutex);
3042         iwl_alive_start(priv);
3043         mutex_unlock(&priv->mutex);
3044 }
3045
3046 static void iwl_bg_run_time_calib_work(struct work_struct *work)
3047 {
3048         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3049                         run_time_calib_work);
3050
3051         mutex_lock(&priv->mutex);
3052
3053         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
3054             test_bit(STATUS_SCANNING, &priv->status)) {
3055                 mutex_unlock(&priv->mutex);
3056                 return;
3057         }
3058
3059         if (priv->start_calib) {
3060                 if (priv->cfg->bt_params &&
3061                     priv->cfg->bt_params->bt_statistics) {
3062                         iwl_chain_noise_calibration(priv,
3063                                         (void *)&priv->_agn.statistics_bt);
3064                         iwl_sensitivity_calibration(priv,
3065                                         (void *)&priv->_agn.statistics_bt);
3066                 } else {
3067                         iwl_chain_noise_calibration(priv,
3068                                         (void *)&priv->_agn.statistics);
3069                         iwl_sensitivity_calibration(priv,
3070                                         (void *)&priv->_agn.statistics);
3071                 }
3072         }
3073
3074         mutex_unlock(&priv->mutex);
3075 }
3076
3077 static void iwl_bg_restart(struct work_struct *data)
3078 {
3079         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3080
3081         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3082                 return;
3083
3084         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3085                 struct iwl_rxon_context *ctx;
3086                 bool bt_sco, bt_full_concurrent;
3087                 u8 bt_ci_compliance;
3088                 u8 bt_load;
3089                 u8 bt_status;
3090</