Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/linville...
[kernel.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 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/pci.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/delay.h>
36 #include <linux/sched.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #define DRV_NAME        "iwlagn"
49
50 #include "iwl-eeprom.h"
51 #include "iwl-dev.h"
52 #include "iwl-core.h"
53 #include "iwl-io.h"
54 #include "iwl-helpers.h"
55 #include "iwl-sta.h"
56 #include "iwl-calib.h"
57
58
59 /******************************************************************************
60  *
61  * module boiler plate
62  *
63  ******************************************************************************/
64
65 /*
66  * module name, copyright, version, etc.
67  */
68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
69
70 #ifdef CONFIG_IWLWIFI_DEBUG
71 #define VD "d"
72 #else
73 #define VD
74 #endif
75
76 #define DRV_VERSION     IWLWIFI_VERSION VD
77
78
79 MODULE_DESCRIPTION(DRV_DESCRIPTION);
80 MODULE_VERSION(DRV_VERSION);
81 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
82 MODULE_LICENSE("GPL");
83 MODULE_ALIAS("iwl4965");
84
85 /*************** STATION TABLE MANAGEMENT ****
86  * mac80211 should be examined to determine if sta_info is duplicating
87  * the functionality provided here
88  */
89
90 /**************************************************************/
91
92 /**
93  * iwl_commit_rxon - commit staging_rxon to hardware
94  *
95  * The RXON command in staging_rxon is committed to the hardware and
96  * the active_rxon structure is updated with the new data.  This
97  * function correctly transitions out of the RXON_ASSOC_MSK state if
98  * a HW tune is required based on the RXON structure changes.
99  */
100 int iwl_commit_rxon(struct iwl_priv *priv)
101 {
102         /* cast away the const for active_rxon in this function */
103         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
104         int ret;
105         bool new_assoc =
106                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
107
108         if (!iwl_is_alive(priv))
109                 return -EBUSY;
110
111         /* always get timestamp with Rx frame */
112         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
113
114         ret = iwl_check_rxon_cmd(priv);
115         if (ret) {
116                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
117                 return -EINVAL;
118         }
119
120         /*
121          * receive commit_rxon request
122          * abort any previous channel switch if still in process
123          */
124         if (priv->switch_rxon.switch_in_progress &&
125             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
126                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
127                       le16_to_cpu(priv->switch_rxon.channel));
128                 priv->switch_rxon.switch_in_progress = false;
129         }
130
131         /* If we don't need to send a full RXON, we can use
132          * iwl_rxon_assoc_cmd which is used to reconfigure filter
133          * and other flags for the current radio configuration. */
134         if (!iwl_full_rxon_required(priv)) {
135                 ret = iwl_send_rxon_assoc(priv);
136                 if (ret) {
137                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
138                         return ret;
139                 }
140
141                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
142                 iwl_print_rx_config_cmd(priv);
143                 return 0;
144         }
145
146         /* station table will be cleared */
147         priv->assoc_station_added = 0;
148
149         /* If we are currently associated and the new config requires
150          * an RXON_ASSOC and the new config wants the associated mask enabled,
151          * we must clear the associated from the active configuration
152          * before we apply the new config */
153         if (iwl_is_associated(priv) && new_assoc) {
154                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
155                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
156
157                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
158                                       sizeof(struct iwl_rxon_cmd),
159                                       &priv->active_rxon);
160
161                 /* If the mask clearing failed then we set
162                  * active_rxon back to what it was previously */
163                 if (ret) {
164                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
165                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
166                         return ret;
167                 }
168         }
169
170         IWL_DEBUG_INFO(priv, "Sending RXON\n"
171                        "* with%s RXON_FILTER_ASSOC_MSK\n"
172                        "* channel = %d\n"
173                        "* bssid = %pM\n",
174                        (new_assoc ? "" : "out"),
175                        le16_to_cpu(priv->staging_rxon.channel),
176                        priv->staging_rxon.bssid_addr);
177
178         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
179
180         /* Apply the new configuration
181          * RXON unassoc clears the station table in uCode, send it before
182          * we add the bcast station. If assoc bit is set, we will send RXON
183          * after having added the bcast and bssid station.
184          */
185         if (!new_assoc) {
186                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
187                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
188                 if (ret) {
189                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
190                         return ret;
191                 }
192                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
193         }
194
195         iwl_clear_stations_table(priv);
196
197         priv->start_calib = 0;
198
199         /* Add the broadcast address so we can send broadcast frames */
200         priv->cfg->ops->lib->add_bcast_station(priv);
201
202
203         /* If we have set the ASSOC_MSK and we are in BSS mode then
204          * add the IWL_AP_ID to the station rate table */
205         if (new_assoc) {
206                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
207                         ret = iwl_rxon_add_station(priv,
208                                            priv->active_rxon.bssid_addr, 1);
209                         if (ret == IWL_INVALID_STATION) {
210                                 IWL_ERR(priv,
211                                         "Error adding AP address for TX.\n");
212                                 return -EIO;
213                         }
214                         priv->assoc_station_added = 1;
215                         if (priv->default_wep_key &&
216                             iwl_send_static_wepkey_cmd(priv, 0))
217                                 IWL_ERR(priv,
218                                         "Could not send WEP static key.\n");
219                 }
220
221                 /*
222                  * allow CTS-to-self if possible for new association.
223                  * this is relevant only for 5000 series and up,
224                  * but will not damage 4965
225                  */
226                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
227
228                 /* Apply the new configuration
229                  * RXON assoc doesn't clear the station table in uCode,
230                  */
231                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
232                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
233                 if (ret) {
234                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
235                         return ret;
236                 }
237                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
238         }
239         iwl_print_rx_config_cmd(priv);
240
241         iwl_init_sensitivity(priv);
242
243         /* If we issue a new RXON command which required a tune then we must
244          * send a new TXPOWER command or we won't be able to Tx any frames */
245         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
246         if (ret) {
247                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
248                 return ret;
249         }
250
251         return 0;
252 }
253
254 void iwl_update_chain_flags(struct iwl_priv *priv)
255 {
256
257         if (priv->cfg->ops->hcmd->set_rxon_chain)
258                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
259         iwlcore_commit_rxon(priv);
260 }
261
262 static void iwl_clear_free_frames(struct iwl_priv *priv)
263 {
264         struct list_head *element;
265
266         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
267                        priv->frames_count);
268
269         while (!list_empty(&priv->free_frames)) {
270                 element = priv->free_frames.next;
271                 list_del(element);
272                 kfree(list_entry(element, struct iwl_frame, list));
273                 priv->frames_count--;
274         }
275
276         if (priv->frames_count) {
277                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
278                             priv->frames_count);
279                 priv->frames_count = 0;
280         }
281 }
282
283 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
284 {
285         struct iwl_frame *frame;
286         struct list_head *element;
287         if (list_empty(&priv->free_frames)) {
288                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
289                 if (!frame) {
290                         IWL_ERR(priv, "Could not allocate frame!\n");
291                         return NULL;
292                 }
293
294                 priv->frames_count++;
295                 return frame;
296         }
297
298         element = priv->free_frames.next;
299         list_del(element);
300         return list_entry(element, struct iwl_frame, list);
301 }
302
303 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
304 {
305         memset(frame, 0, sizeof(*frame));
306         list_add(&frame->list, &priv->free_frames);
307 }
308
309 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
310                                           struct ieee80211_hdr *hdr,
311                                           int left)
312 {
313         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
314             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
315              (priv->iw_mode != NL80211_IFTYPE_AP)))
316                 return 0;
317
318         if (priv->ibss_beacon->len > left)
319                 return 0;
320
321         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
322
323         return priv->ibss_beacon->len;
324 }
325
326 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
327 static void iwl_set_beacon_tim(struct iwl_priv *priv,
328                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
329                 u8 *beacon, u32 frame_size)
330 {
331         u16 tim_idx;
332         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
333
334         /*
335          * The index is relative to frame start but we start looking at the
336          * variable-length part of the beacon.
337          */
338         tim_idx = mgmt->u.beacon.variable - beacon;
339
340         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
341         while ((tim_idx < (frame_size - 2)) &&
342                         (beacon[tim_idx] != WLAN_EID_TIM))
343                 tim_idx += beacon[tim_idx+1] + 2;
344
345         /* If TIM field was found, set variables */
346         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
347                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
348                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
349         } else
350                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
351 }
352
353 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
354                                        struct iwl_frame *frame)
355 {
356         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
357         u32 frame_size;
358         u32 rate_flags;
359         u32 rate;
360         /*
361          * We have to set up the TX command, the TX Beacon command, and the
362          * beacon contents.
363          */
364
365         /* Initialize memory */
366         tx_beacon_cmd = &frame->u.beacon;
367         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
368
369         /* Set up TX beacon contents */
370         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
371                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
372         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
373                 return 0;
374
375         /* Set up TX command fields */
376         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
377         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
378         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
379         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
380                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
381
382         /* Set up TX beacon command fields */
383         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
384                         frame_size);
385
386         /* Set up packet rate and flags */
387         rate = iwl_rate_get_lowest_plcp(priv);
388         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
389         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
390         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
391                 rate_flags |= RATE_MCS_CCK_MSK;
392         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
393                         rate_flags);
394
395         return sizeof(*tx_beacon_cmd) + frame_size;
396 }
397 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
398 {
399         struct iwl_frame *frame;
400         unsigned int frame_size;
401         int rc;
402
403         frame = iwl_get_free_frame(priv);
404         if (!frame) {
405                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
406                           "command.\n");
407                 return -ENOMEM;
408         }
409
410         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
411         if (!frame_size) {
412                 IWL_ERR(priv, "Error configuring the beacon command\n");
413                 iwl_free_frame(priv, frame);
414                 return -EINVAL;
415         }
416
417         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
418                               &frame->u.cmd[0]);
419
420         iwl_free_frame(priv, frame);
421
422         return rc;
423 }
424
425 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
426 {
427         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
428
429         dma_addr_t addr = get_unaligned_le32(&tb->lo);
430         if (sizeof(dma_addr_t) > sizeof(u32))
431                 addr |=
432                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
433
434         return addr;
435 }
436
437 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
438 {
439         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
440
441         return le16_to_cpu(tb->hi_n_len) >> 4;
442 }
443
444 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
445                                   dma_addr_t addr, u16 len)
446 {
447         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
448         u16 hi_n_len = len << 4;
449
450         put_unaligned_le32(addr, &tb->lo);
451         if (sizeof(dma_addr_t) > sizeof(u32))
452                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
453
454         tb->hi_n_len = cpu_to_le16(hi_n_len);
455
456         tfd->num_tbs = idx + 1;
457 }
458
459 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
460 {
461         return tfd->num_tbs & 0x1f;
462 }
463
464 /**
465  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
466  * @priv - driver private data
467  * @txq - tx queue
468  *
469  * Does NOT advance any TFD circular buffer read/write indexes
470  * Does NOT free the TFD itself (which is within circular buffer)
471  */
472 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
473 {
474         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
475         struct iwl_tfd *tfd;
476         struct pci_dev *dev = priv->pci_dev;
477         int index = txq->q.read_ptr;
478         int i;
479         int num_tbs;
480
481         tfd = &tfd_tmp[index];
482
483         /* Sanity check on number of chunks */
484         num_tbs = iwl_tfd_get_num_tbs(tfd);
485
486         if (num_tbs >= IWL_NUM_OF_TBS) {
487                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
488                 /* @todo issue fatal error, it is quite serious situation */
489                 return;
490         }
491
492         /* Unmap tx_cmd */
493         if (num_tbs)
494                 pci_unmap_single(dev,
495                                 pci_unmap_addr(&txq->meta[index], mapping),
496                                 pci_unmap_len(&txq->meta[index], len),
497                                 PCI_DMA_BIDIRECTIONAL);
498
499         /* Unmap chunks, if any. */
500         for (i = 1; i < num_tbs; i++) {
501                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
502                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
503
504                 if (txq->txb) {
505                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
506                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
507                 }
508         }
509 }
510
511 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
512                                  struct iwl_tx_queue *txq,
513                                  dma_addr_t addr, u16 len,
514                                  u8 reset, u8 pad)
515 {
516         struct iwl_queue *q;
517         struct iwl_tfd *tfd, *tfd_tmp;
518         u32 num_tbs;
519
520         q = &txq->q;
521         tfd_tmp = (struct iwl_tfd *)txq->tfds;
522         tfd = &tfd_tmp[q->write_ptr];
523
524         if (reset)
525                 memset(tfd, 0, sizeof(*tfd));
526
527         num_tbs = iwl_tfd_get_num_tbs(tfd);
528
529         /* Each TFD can point to a maximum 20 Tx buffers */
530         if (num_tbs >= IWL_NUM_OF_TBS) {
531                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
532                           IWL_NUM_OF_TBS);
533                 return -EINVAL;
534         }
535
536         BUG_ON(addr & ~DMA_BIT_MASK(36));
537         if (unlikely(addr & ~IWL_TX_DMA_MASK))
538                 IWL_ERR(priv, "Unaligned address = %llx\n",
539                           (unsigned long long)addr);
540
541         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
542
543         return 0;
544 }
545
546 /*
547  * Tell nic where to find circular buffer of Tx Frame Descriptors for
548  * given Tx queue, and enable the DMA channel used for that queue.
549  *
550  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
551  * channels supported in hardware.
552  */
553 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
554                          struct iwl_tx_queue *txq)
555 {
556         int txq_id = txq->q.id;
557
558         /* Circular buffer (TFD queue in DRAM) physical base address */
559         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
560                              txq->q.dma_addr >> 8);
561
562         return 0;
563 }
564
565 /******************************************************************************
566  *
567  * Generic RX handler implementations
568  *
569  ******************************************************************************/
570 static void iwl_rx_reply_alive(struct iwl_priv *priv,
571                                 struct iwl_rx_mem_buffer *rxb)
572 {
573         struct iwl_rx_packet *pkt = rxb_addr(rxb);
574         struct iwl_alive_resp *palive;
575         struct delayed_work *pwork;
576
577         palive = &pkt->u.alive_frame;
578
579         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
580                        "0x%01X 0x%01X\n",
581                        palive->is_valid, palive->ver_type,
582                        palive->ver_subtype);
583
584         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
585                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
586                 memcpy(&priv->card_alive_init,
587                        &pkt->u.alive_frame,
588                        sizeof(struct iwl_init_alive_resp));
589                 pwork = &priv->init_alive_start;
590         } else {
591                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
592                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
593                        sizeof(struct iwl_alive_resp));
594                 pwork = &priv->alive_start;
595         }
596
597         /* We delay the ALIVE response by 5ms to
598          * give the HW RF Kill time to activate... */
599         if (palive->is_valid == UCODE_VALID_OK)
600                 queue_delayed_work(priv->workqueue, pwork,
601                                    msecs_to_jiffies(5));
602         else
603                 IWL_WARN(priv, "uCode did not respond OK.\n");
604 }
605
606 static void iwl_bg_beacon_update(struct work_struct *work)
607 {
608         struct iwl_priv *priv =
609                 container_of(work, struct iwl_priv, beacon_update);
610         struct sk_buff *beacon;
611
612         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
613         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
614
615         if (!beacon) {
616                 IWL_ERR(priv, "update beacon failed\n");
617                 return;
618         }
619
620         mutex_lock(&priv->mutex);
621         /* new beacon skb is allocated every time; dispose previous.*/
622         if (priv->ibss_beacon)
623                 dev_kfree_skb(priv->ibss_beacon);
624
625         priv->ibss_beacon = beacon;
626         mutex_unlock(&priv->mutex);
627
628         iwl_send_beacon_cmd(priv);
629 }
630
631 /**
632  * iwl_bg_statistics_periodic - Timer callback to queue statistics
633  *
634  * This callback is provided in order to send a statistics request.
635  *
636  * This timer function is continually reset to execute within
637  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
638  * was received.  We need to ensure we receive the statistics in order
639  * to update the temperature used for calibrating the TXPOWER.
640  */
641 static void iwl_bg_statistics_periodic(unsigned long data)
642 {
643         struct iwl_priv *priv = (struct iwl_priv *)data;
644
645         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
646                 return;
647
648         /* dont send host command if rf-kill is on */
649         if (!iwl_is_ready_rf(priv))
650                 return;
651
652         iwl_send_statistics_request(priv, CMD_ASYNC, false);
653 }
654
655
656 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
657                                         u32 start_idx, u32 num_events,
658                                         u32 mode)
659 {
660         u32 i;
661         u32 ptr;        /* SRAM byte address of log data */
662         u32 ev, time, data; /* event log data */
663         unsigned long reg_flags;
664
665         if (mode == 0)
666                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
667         else
668                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
669
670         /* Make sure device is powered up for SRAM reads */
671         spin_lock_irqsave(&priv->reg_lock, reg_flags);
672         if (iwl_grab_nic_access(priv)) {
673                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
674                 return;
675         }
676
677         /* Set starting address; reads will auto-increment */
678         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
679         rmb();
680
681         /*
682          * "time" is actually "data" for mode 0 (no timestamp).
683          * place event id # at far right for easier visual parsing.
684          */
685         for (i = 0; i < num_events; i++) {
686                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
687                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
688                 if (mode == 0) {
689                         trace_iwlwifi_dev_ucode_cont_event(priv,
690                                                         0, time, ev);
691                 } else {
692                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
693                         trace_iwlwifi_dev_ucode_cont_event(priv,
694                                                 time, data, ev);
695                 }
696         }
697         /* Allow device to power down */
698         iwl_release_nic_access(priv);
699         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
700 }
701
702 static void iwl_continuous_event_trace(struct iwl_priv *priv)
703 {
704         u32 capacity;   /* event log capacity in # entries */
705         u32 base;       /* SRAM byte address of event log header */
706         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
707         u32 num_wraps;  /* # times uCode wrapped to top of log */
708         u32 next_entry; /* index of next entry to be written by uCode */
709
710         if (priv->ucode_type == UCODE_INIT)
711                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
712         else
713                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
714         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
715                 capacity = iwl_read_targ_mem(priv, base);
716                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
717                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
718                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
719         } else
720                 return;
721
722         if (num_wraps == priv->event_log.num_wraps) {
723                 iwl_print_cont_event_trace(priv,
724                                        base, priv->event_log.next_entry,
725                                        next_entry - priv->event_log.next_entry,
726                                        mode);
727                 priv->event_log.non_wraps_count++;
728         } else {
729                 if ((num_wraps - priv->event_log.num_wraps) > 1)
730                         priv->event_log.wraps_more_count++;
731                 else
732                         priv->event_log.wraps_once_count++;
733                 trace_iwlwifi_dev_ucode_wrap_event(priv,
734                                 num_wraps - priv->event_log.num_wraps,
735                                 next_entry, priv->event_log.next_entry);
736                 if (next_entry < priv->event_log.next_entry) {
737                         iwl_print_cont_event_trace(priv, base,
738                                priv->event_log.next_entry,
739                                capacity - priv->event_log.next_entry,
740                                mode);
741
742                         iwl_print_cont_event_trace(priv, base, 0,
743                                 next_entry, mode);
744                 } else {
745                         iwl_print_cont_event_trace(priv, base,
746                                next_entry, capacity - next_entry,
747                                mode);
748
749                         iwl_print_cont_event_trace(priv, base, 0,
750                                 next_entry, mode);
751                 }
752         }
753         priv->event_log.num_wraps = num_wraps;
754         priv->event_log.next_entry = next_entry;
755 }
756
757 /**
758  * iwl_bg_ucode_trace - Timer callback to log ucode event
759  *
760  * The timer is continually set to execute every
761  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
762  * this function is to perform continuous uCode event logging operation
763  * if enabled
764  */
765 static void iwl_bg_ucode_trace(unsigned long data)
766 {
767         struct iwl_priv *priv = (struct iwl_priv *)data;
768
769         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
770                 return;
771
772         if (priv->event_log.ucode_trace) {
773                 iwl_continuous_event_trace(priv);
774                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
775                 mod_timer(&priv->ucode_trace,
776                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
777         }
778 }
779
780 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
781                                 struct iwl_rx_mem_buffer *rxb)
782 {
783 #ifdef CONFIG_IWLWIFI_DEBUG
784         struct iwl_rx_packet *pkt = rxb_addr(rxb);
785         struct iwl4965_beacon_notif *beacon =
786                 (struct iwl4965_beacon_notif *)pkt->u.raw;
787         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
788
789         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
790                 "tsf %d %d rate %d\n",
791                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
792                 beacon->beacon_notify_hdr.failure_frame,
793                 le32_to_cpu(beacon->ibss_mgr_status),
794                 le32_to_cpu(beacon->high_tsf),
795                 le32_to_cpu(beacon->low_tsf), rate);
796 #endif
797
798         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
799             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
800                 queue_work(priv->workqueue, &priv->beacon_update);
801 }
802
803 /* Handle notification from uCode that card's power state is changing
804  * due to software, hardware, or critical temperature RFKILL */
805 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
806                                     struct iwl_rx_mem_buffer *rxb)
807 {
808         struct iwl_rx_packet *pkt = rxb_addr(rxb);
809         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
810         unsigned long status = priv->status;
811
812         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
813                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
814                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
815                           (flags & CT_CARD_DISABLED) ?
816                           "Reached" : "Not reached");
817
818         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
819                      CT_CARD_DISABLED)) {
820
821                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
822                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
823
824                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
825                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
826
827                 if (!(flags & RXON_CARD_DISABLED)) {
828                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
829                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
830                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
831                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
832                 }
833                 if (flags & CT_CARD_DISABLED)
834                         iwl_tt_enter_ct_kill(priv);
835         }
836         if (!(flags & CT_CARD_DISABLED))
837                 iwl_tt_exit_ct_kill(priv);
838
839         if (flags & HW_CARD_DISABLED)
840                 set_bit(STATUS_RF_KILL_HW, &priv->status);
841         else
842                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
843
844
845         if (!(flags & RXON_CARD_DISABLED))
846                 iwl_scan_cancel(priv);
847
848         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
849              test_bit(STATUS_RF_KILL_HW, &priv->status)))
850                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
851                         test_bit(STATUS_RF_KILL_HW, &priv->status));
852         else
853                 wake_up_interruptible(&priv->wait_command_queue);
854 }
855
856 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
857 {
858         if (src == IWL_PWR_SRC_VAUX) {
859                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
860                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
861                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
862                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
863         } else {
864                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
865                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
866                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
867         }
868
869         return 0;
870 }
871
872 /**
873  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
874  *
875  * Setup the RX handlers for each of the reply types sent from the uCode
876  * to the host.
877  *
878  * This function chains into the hardware specific files for them to setup
879  * any hardware specific handlers as well.
880  */
881 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
882 {
883         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
884         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
885         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
886         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
887                         iwl_rx_spectrum_measure_notif;
888         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
889         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
890             iwl_rx_pm_debug_statistics_notif;
891         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
892
893         /*
894          * The same handler is used for both the REPLY to a discrete
895          * statistics request from the host as well as for the periodic
896          * statistics notifications (after received beacons) from the uCode.
897          */
898         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
899         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
900
901         iwl_setup_rx_scan_handlers(priv);
902
903         /* status change handler */
904         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
905
906         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
907             iwl_rx_missed_beacon_notif;
908         /* Rx handlers */
909         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
910         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
911         /* block ack */
912         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
913         /* Set up hardware specific Rx handlers */
914         priv->cfg->ops->lib->rx_handler_setup(priv);
915 }
916
917 /**
918  * iwl_rx_handle - Main entry function for receiving responses from uCode
919  *
920  * Uses the priv->rx_handlers callback function array to invoke
921  * the appropriate handlers, including command responses,
922  * frame-received notifications, and other notifications.
923  */
924 void iwl_rx_handle(struct iwl_priv *priv)
925 {
926         struct iwl_rx_mem_buffer *rxb;
927         struct iwl_rx_packet *pkt;
928         struct iwl_rx_queue *rxq = &priv->rxq;
929         u32 r, i;
930         int reclaim;
931         unsigned long flags;
932         u8 fill_rx = 0;
933         u32 count = 8;
934         int total_empty;
935
936         /* uCode's read index (stored in shared DRAM) indicates the last Rx
937          * buffer that the driver may process (last buffer filled by ucode). */
938         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
939         i = rxq->read;
940
941         /* Rx interrupt, but nothing sent from uCode */
942         if (i == r)
943                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
944
945         /* calculate total frames need to be restock after handling RX */
946         total_empty = r - rxq->write_actual;
947         if (total_empty < 0)
948                 total_empty += RX_QUEUE_SIZE;
949
950         if (total_empty > (RX_QUEUE_SIZE / 2))
951                 fill_rx = 1;
952
953         while (i != r) {
954                 rxb = rxq->queue[i];
955
956                 /* If an RXB doesn't have a Rx queue slot associated with it,
957                  * then a bug has been introduced in the queue refilling
958                  * routines -- catch it here */
959                 BUG_ON(rxb == NULL);
960
961                 rxq->queue[i] = NULL;
962
963                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
964                                PAGE_SIZE << priv->hw_params.rx_page_order,
965                                PCI_DMA_FROMDEVICE);
966                 pkt = rxb_addr(rxb);
967
968                 trace_iwlwifi_dev_rx(priv, pkt,
969                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
970
971                 /* Reclaim a command buffer only if this packet is a response
972                  *   to a (driver-originated) command.
973                  * If the packet (e.g. Rx frame) originated from uCode,
974                  *   there is no command buffer to reclaim.
975                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
976                  *   but apparently a few don't get set; catch them here. */
977                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
978                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
979                         (pkt->hdr.cmd != REPLY_RX) &&
980                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
981                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
982                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
983                         (pkt->hdr.cmd != REPLY_TX);
984
985                 /* Based on type of command response or notification,
986                  *   handle those that need handling via function in
987                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
988                 if (priv->rx_handlers[pkt->hdr.cmd]) {
989                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
990                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
991                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
992                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
993                 } else {
994                         /* No handling needed */
995                         IWL_DEBUG_RX(priv,
996                                 "r %d i %d No handler needed for %s, 0x%02x\n",
997                                 r, i, get_cmd_string(pkt->hdr.cmd),
998                                 pkt->hdr.cmd);
999                 }
1000
1001                 /*
1002                  * XXX: After here, we should always check rxb->page
1003                  * against NULL before touching it or its virtual
1004                  * memory (pkt). Because some rx_handler might have
1005                  * already taken or freed the pages.
1006                  */
1007
1008                 if (reclaim) {
1009                         /* Invoke any callbacks, transfer the buffer to caller,
1010                          * and fire off the (possibly) blocking iwl_send_cmd()
1011                          * as we reclaim the driver command queue */
1012                         if (rxb->page)
1013                                 iwl_tx_cmd_complete(priv, rxb);
1014                         else
1015                                 IWL_WARN(priv, "Claim null rxb?\n");
1016                 }
1017
1018                 /* Reuse the page if possible. For notification packets and
1019                  * SKBs that fail to Rx correctly, add them back into the
1020                  * rx_free list for reuse later. */
1021                 spin_lock_irqsave(&rxq->lock, flags);
1022                 if (rxb->page != NULL) {
1023                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1024                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1025                                 PCI_DMA_FROMDEVICE);
1026                         list_add_tail(&rxb->list, &rxq->rx_free);
1027                         rxq->free_count++;
1028                 } else
1029                         list_add_tail(&rxb->list, &rxq->rx_used);
1030
1031                 spin_unlock_irqrestore(&rxq->lock, flags);
1032
1033                 i = (i + 1) & RX_QUEUE_MASK;
1034                 /* If there are a lot of unused frames,
1035                  * restock the Rx queue so ucode wont assert. */
1036                 if (fill_rx) {
1037                         count++;
1038                         if (count >= 8) {
1039                                 rxq->read = i;
1040                                 iwl_rx_replenish_now(priv);
1041                                 count = 0;
1042                         }
1043                 }
1044         }
1045
1046         /* Backtrack one entry */
1047         rxq->read = i;
1048         if (fill_rx)
1049                 iwl_rx_replenish_now(priv);
1050         else
1051                 iwl_rx_queue_restock(priv);
1052 }
1053
1054 /* call this function to flush any scheduled tasklet */
1055 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1056 {
1057         /* wait to make sure we flush pending tasklet*/
1058         synchronize_irq(priv->pci_dev->irq);
1059         tasklet_kill(&priv->irq_tasklet);
1060 }
1061
1062 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
1063 {
1064         u32 inta, handled = 0;
1065         u32 inta_fh;
1066         unsigned long flags;
1067         u32 i;
1068 #ifdef CONFIG_IWLWIFI_DEBUG
1069         u32 inta_mask;
1070 #endif
1071
1072         spin_lock_irqsave(&priv->lock, flags);
1073
1074         /* Ack/clear/reset pending uCode interrupts.
1075          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1076          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1077         inta = iwl_read32(priv, CSR_INT);
1078         iwl_write32(priv, CSR_INT, inta);
1079
1080         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1081          * Any new interrupts that happen after this, either while we're
1082          * in this tasklet, or later, will show up in next ISR/tasklet. */
1083         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1084         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1085
1086 #ifdef CONFIG_IWLWIFI_DEBUG
1087         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1088                 /* just for debug */
1089                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1090                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1091                               inta, inta_mask, inta_fh);
1092         }
1093 #endif
1094
1095         spin_unlock_irqrestore(&priv->lock, flags);
1096
1097         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1098          * atomic, make sure that inta covers all the interrupts that
1099          * we've discovered, even if FH interrupt came in just after
1100          * reading CSR_INT. */
1101         if (inta_fh & CSR49_FH_INT_RX_MASK)
1102                 inta |= CSR_INT_BIT_FH_RX;
1103         if (inta_fh & CSR49_FH_INT_TX_MASK)
1104                 inta |= CSR_INT_BIT_FH_TX;
1105
1106         /* Now service all interrupt bits discovered above. */
1107         if (inta & CSR_INT_BIT_HW_ERR) {
1108                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1109
1110                 /* Tell the device to stop sending interrupts */
1111                 iwl_disable_interrupts(priv);
1112
1113                 priv->isr_stats.hw++;
1114                 iwl_irq_handle_error(priv);
1115
1116                 handled |= CSR_INT_BIT_HW_ERR;
1117
1118                 return;
1119         }
1120
1121 #ifdef CONFIG_IWLWIFI_DEBUG
1122         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1123                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1124                 if (inta & CSR_INT_BIT_SCD) {
1125                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1126                                       "the frame/frames.\n");
1127                         priv->isr_stats.sch++;
1128                 }
1129
1130                 /* Alive notification via Rx interrupt will do the real work */
1131                 if (inta & CSR_INT_BIT_ALIVE) {
1132                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1133                         priv->isr_stats.alive++;
1134                 }
1135         }
1136 #endif
1137         /* Safely ignore these bits for debug checks below */
1138         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1139
1140         /* HW RF KILL switch toggled */
1141         if (inta & CSR_INT_BIT_RF_KILL) {
1142                 int hw_rf_kill = 0;
1143                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1144                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1145                         hw_rf_kill = 1;
1146
1147                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1148                                 hw_rf_kill ? "disable radio" : "enable radio");
1149
1150                 priv->isr_stats.rfkill++;
1151
1152                 /* driver only loads ucode once setting the interface up.
1153                  * the driver allows loading the ucode even if the radio
1154                  * is killed. Hence update the killswitch state here. The
1155                  * rfkill handler will care about restarting if needed.
1156                  */
1157                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1158                         if (hw_rf_kill)
1159                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1160                         else
1161                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1162                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1163                 }
1164
1165                 handled |= CSR_INT_BIT_RF_KILL;
1166         }
1167
1168         /* Chip got too hot and stopped itself */
1169         if (inta & CSR_INT_BIT_CT_KILL) {
1170                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1171                 priv->isr_stats.ctkill++;
1172                 handled |= CSR_INT_BIT_CT_KILL;
1173         }
1174
1175         /* Error detected by uCode */
1176         if (inta & CSR_INT_BIT_SW_ERR) {
1177                 IWL_ERR(priv, "Microcode SW error detected. "
1178                         " Restarting 0x%X.\n", inta);
1179                 priv->isr_stats.sw++;
1180                 priv->isr_stats.sw_err = inta;
1181                 iwl_irq_handle_error(priv);
1182                 handled |= CSR_INT_BIT_SW_ERR;
1183         }
1184
1185         /*
1186          * uCode wakes up after power-down sleep.
1187          * Tell device about any new tx or host commands enqueued,
1188          * and about any Rx buffers made available while asleep.
1189          */
1190         if (inta & CSR_INT_BIT_WAKEUP) {
1191                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1192                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1193                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1194                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1195                 priv->isr_stats.wakeup++;
1196                 handled |= CSR_INT_BIT_WAKEUP;
1197         }
1198
1199         /* All uCode command responses, including Tx command responses,
1200          * Rx "responses" (frame-received notification), and other
1201          * notifications from uCode come through here*/
1202         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1203                 iwl_rx_handle(priv);
1204                 priv->isr_stats.rx++;
1205                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1206         }
1207
1208         /* This "Tx" DMA channel is used only for loading uCode */
1209         if (inta & CSR_INT_BIT_FH_TX) {
1210                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1211                 priv->isr_stats.tx++;
1212                 handled |= CSR_INT_BIT_FH_TX;
1213                 /* Wake up uCode load routine, now that load is complete */
1214                 priv->ucode_write_complete = 1;
1215                 wake_up_interruptible(&priv->wait_command_queue);
1216         }
1217
1218         if (inta & ~handled) {
1219                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1220                 priv->isr_stats.unhandled++;
1221         }
1222
1223         if (inta & ~(priv->inta_mask)) {
1224                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1225                          inta & ~priv->inta_mask);
1226                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1227         }
1228
1229         /* Re-enable all interrupts */
1230         /* only Re-enable if diabled by irq */
1231         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1232                 iwl_enable_interrupts(priv);
1233
1234 #ifdef CONFIG_IWLWIFI_DEBUG
1235         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1236                 inta = iwl_read32(priv, CSR_INT);
1237                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1238                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1239                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1240                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1241         }
1242 #endif
1243 }
1244
1245 /* tasklet for iwlagn interrupt */
1246 static void iwl_irq_tasklet(struct iwl_priv *priv)
1247 {
1248         u32 inta = 0;
1249         u32 handled = 0;
1250         unsigned long flags;
1251         u32 i;
1252 #ifdef CONFIG_IWLWIFI_DEBUG
1253         u32 inta_mask;
1254 #endif
1255
1256         spin_lock_irqsave(&priv->lock, flags);
1257
1258         /* Ack/clear/reset pending uCode interrupts.
1259          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1260          */
1261         iwl_write32(priv, CSR_INT, priv->inta);
1262
1263         inta = priv->inta;
1264
1265 #ifdef CONFIG_IWLWIFI_DEBUG
1266         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1267                 /* just for debug */
1268                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1269                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1270                                 inta, inta_mask);
1271         }
1272 #endif
1273
1274         spin_unlock_irqrestore(&priv->lock, flags);
1275
1276         /* saved interrupt in inta variable now we can reset priv->inta */
1277         priv->inta = 0;
1278
1279         /* Now service all interrupt bits discovered above. */
1280         if (inta & CSR_INT_BIT_HW_ERR) {
1281                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1282
1283                 /* Tell the device to stop sending interrupts */
1284                 iwl_disable_interrupts(priv);
1285
1286                 priv->isr_stats.hw++;
1287                 iwl_irq_handle_error(priv);
1288
1289                 handled |= CSR_INT_BIT_HW_ERR;
1290
1291                 return;
1292         }
1293
1294 #ifdef CONFIG_IWLWIFI_DEBUG
1295         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1296                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1297                 if (inta & CSR_INT_BIT_SCD) {
1298                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1299                                       "the frame/frames.\n");
1300                         priv->isr_stats.sch++;
1301                 }
1302
1303                 /* Alive notification via Rx interrupt will do the real work */
1304                 if (inta & CSR_INT_BIT_ALIVE) {
1305                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1306                         priv->isr_stats.alive++;
1307                 }
1308         }
1309 #endif
1310         /* Safely ignore these bits for debug checks below */
1311         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1312
1313         /* HW RF KILL switch toggled */
1314         if (inta & CSR_INT_BIT_RF_KILL) {
1315                 int hw_rf_kill = 0;
1316                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1317                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1318                         hw_rf_kill = 1;
1319
1320                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1321                                 hw_rf_kill ? "disable radio" : "enable radio");
1322
1323                 priv->isr_stats.rfkill++;
1324
1325                 /* driver only loads ucode once setting the interface up.
1326                  * the driver allows loading the ucode even if the radio
1327                  * is killed. Hence update the killswitch state here. The
1328                  * rfkill handler will care about restarting if needed.
1329                  */
1330                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1331                         if (hw_rf_kill)
1332                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1333                         else
1334                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1335                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1336                 }
1337
1338                 handled |= CSR_INT_BIT_RF_KILL;
1339         }
1340
1341         /* Chip got too hot and stopped itself */
1342         if (inta & CSR_INT_BIT_CT_KILL) {
1343                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1344                 priv->isr_stats.ctkill++;
1345                 handled |= CSR_INT_BIT_CT_KILL;
1346         }
1347
1348         /* Error detected by uCode */
1349         if (inta & CSR_INT_BIT_SW_ERR) {
1350                 IWL_ERR(priv, "Microcode SW error detected. "
1351                         " Restarting 0x%X.\n", inta);
1352                 priv->isr_stats.sw++;
1353                 priv->isr_stats.sw_err = inta;
1354                 iwl_irq_handle_error(priv);
1355                 handled |= CSR_INT_BIT_SW_ERR;
1356         }
1357
1358         /* uCode wakes up after power-down sleep */
1359         if (inta & CSR_INT_BIT_WAKEUP) {
1360                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1361                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1362                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1363                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1364
1365                 priv->isr_stats.wakeup++;
1366
1367                 handled |= CSR_INT_BIT_WAKEUP;
1368         }
1369
1370         /* All uCode command responses, including Tx command responses,
1371          * Rx "responses" (frame-received notification), and other
1372          * notifications from uCode come through here*/
1373         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1374                         CSR_INT_BIT_RX_PERIODIC)) {
1375                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1376                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1377                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1378                         iwl_write32(priv, CSR_FH_INT_STATUS,
1379                                         CSR49_FH_INT_RX_MASK);
1380                 }
1381                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1382                         handled |= CSR_INT_BIT_RX_PERIODIC;
1383                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1384                 }
1385                 /* Sending RX interrupt require many steps to be done in the
1386                  * the device:
1387                  * 1- write interrupt to current index in ICT table.
1388                  * 2- dma RX frame.
1389                  * 3- update RX shared data to indicate last write index.
1390                  * 4- send interrupt.
1391                  * This could lead to RX race, driver could receive RX interrupt
1392                  * but the shared data changes does not reflect this;
1393                  * periodic interrupt will detect any dangling Rx activity.
1394                  */
1395
1396                 /* Disable periodic interrupt; we use it as just a one-shot. */
1397                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1398                             CSR_INT_PERIODIC_DIS);
1399                 iwl_rx_handle(priv);
1400
1401                 /*
1402                  * Enable periodic interrupt in 8 msec only if we received
1403                  * real RX interrupt (instead of just periodic int), to catch
1404                  * any dangling Rx interrupt.  If it was just the periodic
1405                  * interrupt, there was no dangling Rx activity, and no need
1406                  * to extend the periodic interrupt; one-shot is enough.
1407                  */
1408                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1409                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1410                                     CSR_INT_PERIODIC_ENA);
1411
1412                 priv->isr_stats.rx++;
1413         }
1414
1415         /* This "Tx" DMA channel is used only for loading uCode */
1416         if (inta & CSR_INT_BIT_FH_TX) {
1417                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1418                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1419                 priv->isr_stats.tx++;
1420                 handled |= CSR_INT_BIT_FH_TX;
1421                 /* Wake up uCode load routine, now that load is complete */
1422                 priv->ucode_write_complete = 1;
1423                 wake_up_interruptible(&priv->wait_command_queue);
1424         }
1425
1426         if (inta & ~handled) {
1427                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1428                 priv->isr_stats.unhandled++;
1429         }
1430
1431         if (inta & ~(priv->inta_mask)) {
1432                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1433                          inta & ~priv->inta_mask);
1434         }
1435
1436         /* Re-enable all interrupts */
1437         /* only Re-enable if diabled by irq */
1438         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1439                 iwl_enable_interrupts(priv);
1440 }
1441
1442
1443 /******************************************************************************
1444  *
1445  * uCode download functions
1446  *
1447  ******************************************************************************/
1448
1449 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1450 {
1451         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1452         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1453         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1454         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1455         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1456         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1457 }
1458
1459 static void iwl_nic_start(struct iwl_priv *priv)
1460 {
1461         /* Remove all resets to allow NIC to operate */
1462         iwl_write32(priv, CSR_RESET, 0);
1463 }
1464
1465
1466 /**
1467  * iwl_read_ucode - Read uCode images from disk file.
1468  *
1469  * Copy into buffers for card to fetch via bus-mastering
1470  */
1471 static int iwl_read_ucode(struct iwl_priv *priv)
1472 {
1473         struct iwl_ucode_header *ucode;
1474         int ret = -EINVAL, index;
1475         const struct firmware *ucode_raw;
1476         const char *name_pre = priv->cfg->fw_name_pre;
1477         const unsigned int api_max = priv->cfg->ucode_api_max;
1478         const unsigned int api_min = priv->cfg->ucode_api_min;
1479         char buf[25];
1480         u8 *src;
1481         size_t len;
1482         u32 api_ver, build;
1483         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1484         u16 eeprom_ver;
1485
1486         /* Ask kernel firmware_class module to get the boot firmware off disk.
1487          * request_firmware() is synchronous, file is in memory on return. */
1488         for (index = api_max; index >= api_min; index--) {
1489                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1490                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1491                 if (ret < 0) {
1492                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1493                                   buf, ret);
1494                         if (ret == -ENOENT)
1495                                 continue;
1496                         else
1497                                 goto error;
1498                 } else {
1499                         if (index < api_max)
1500                                 IWL_ERR(priv, "Loaded firmware %s, "
1501                                         "which is deprecated. "
1502                                         "Please use API v%u instead.\n",
1503                                           buf, api_max);
1504
1505                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1506                                        buf, ucode_raw->size);
1507                         break;
1508                 }
1509         }
1510
1511         if (ret < 0)
1512                 goto error;
1513
1514         /* Make sure that we got at least the v1 header! */
1515         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1516                 IWL_ERR(priv, "File size way too small!\n");
1517                 ret = -EINVAL;
1518                 goto err_release;
1519         }
1520
1521         /* Data from ucode file:  header followed by uCode images */
1522         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1523
1524         priv->ucode_ver = le32_to_cpu(ucode->ver);
1525         api_ver = IWL_UCODE_API(priv->ucode_ver);
1526         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1527         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1528         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1529         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1530         init_data_size =
1531                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1532         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1533         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1534
1535         /* api_ver should match the api version forming part of the
1536          * firmware filename ... but we don't check for that and only rely
1537          * on the API version read from firmware header from here on forward */
1538
1539         if (api_ver < api_min || api_ver > api_max) {
1540                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1541                           "Driver supports v%u, firmware is v%u.\n",
1542                           api_max, api_ver);
1543                 priv->ucode_ver = 0;
1544                 ret = -EINVAL;
1545                 goto err_release;
1546         }
1547         if (api_ver != api_max)
1548                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1549                           "got v%u. New firmware can be obtained "
1550                           "from http://www.intellinuxwireless.org.\n",
1551                           api_max, api_ver);
1552
1553         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1554                IWL_UCODE_MAJOR(priv->ucode_ver),
1555                IWL_UCODE_MINOR(priv->ucode_ver),
1556                IWL_UCODE_API(priv->ucode_ver),
1557                IWL_UCODE_SERIAL(priv->ucode_ver));
1558
1559         snprintf(priv->hw->wiphy->fw_version,
1560                  sizeof(priv->hw->wiphy->fw_version),
1561                  "%u.%u.%u.%u",
1562                  IWL_UCODE_MAJOR(priv->ucode_ver),
1563                  IWL_UCODE_MINOR(priv->ucode_ver),
1564                  IWL_UCODE_API(priv->ucode_ver),
1565                  IWL_UCODE_SERIAL(priv->ucode_ver));
1566
1567         if (build)
1568                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1569
1570         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1571         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1572                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1573                        ? "OTP" : "EEPROM", eeprom_ver);
1574
1575         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1576                        priv->ucode_ver);
1577         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1578                        inst_size);
1579         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1580                        data_size);
1581         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1582                        init_size);
1583         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1584                        init_data_size);
1585         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1586                        boot_size);
1587
1588         /* Verify size of file vs. image size info in file's header */
1589         if (ucode_raw->size !=
1590                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1591                 inst_size + data_size + init_size +
1592                 init_data_size + boot_size) {
1593
1594                 IWL_DEBUG_INFO(priv,
1595                         "uCode file size %d does not match expected size\n",
1596                         (int)ucode_raw->size);
1597                 ret = -EINVAL;
1598                 goto err_release;
1599         }
1600
1601         /* Verify that uCode images will fit in card's SRAM */
1602         if (inst_size > priv->hw_params.max_inst_size) {
1603                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1604                                inst_size);
1605                 ret = -EINVAL;
1606                 goto err_release;
1607         }
1608
1609         if (data_size > priv->hw_params.max_data_size) {
1610                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1611                                 data_size);
1612                 ret = -EINVAL;
1613                 goto err_release;
1614         }
1615         if (init_size > priv->hw_params.max_inst_size) {
1616                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1617                         init_size);
1618                 ret = -EINVAL;
1619                 goto err_release;
1620         }
1621         if (init_data_size > priv->hw_params.max_data_size) {
1622                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1623                       init_data_size);
1624                 ret = -EINVAL;
1625                 goto err_release;
1626         }
1627         if (boot_size > priv->hw_params.max_bsm_size) {
1628                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1629                         boot_size);
1630                 ret = -EINVAL;
1631                 goto err_release;
1632         }
1633
1634         /* Allocate ucode buffers for card's bus-master loading ... */
1635
1636         /* Runtime instructions and 2 copies of data:
1637          * 1) unmodified from disk
1638          * 2) backup cache for save/restore during power-downs */
1639         priv->ucode_code.len = inst_size;
1640         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1641
1642         priv->ucode_data.len = data_size;
1643         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1644
1645         priv->ucode_data_backup.len = data_size;
1646         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1647
1648         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1649             !priv->ucode_data_backup.v_addr)
1650                 goto err_pci_alloc;
1651
1652         /* Initialization instructions and data */
1653         if (init_size && init_data_size) {
1654                 priv->ucode_init.len = init_size;
1655                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1656
1657                 priv->ucode_init_data.len = init_data_size;
1658                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1659
1660                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1661                         goto err_pci_alloc;
1662         }
1663
1664         /* Bootstrap (instructions only, no data) */
1665         if (boot_size) {
1666                 priv->ucode_boot.len = boot_size;
1667                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1668
1669                 if (!priv->ucode_boot.v_addr)
1670                         goto err_pci_alloc;
1671         }
1672
1673         /* Copy images into buffers for card's bus-master reads ... */
1674
1675         /* Runtime instructions (first block of data in file) */
1676         len = inst_size;
1677         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1678         memcpy(priv->ucode_code.v_addr, src, len);
1679         src += len;
1680
1681         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1682                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1683
1684         /* Runtime data (2nd block)
1685          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1686         len = data_size;
1687         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1688         memcpy(priv->ucode_data.v_addr, src, len);
1689         memcpy(priv->ucode_data_backup.v_addr, src, len);
1690         src += len;
1691
1692         /* Initialization instructions (3rd block) */
1693         if (init_size) {
1694                 len = init_size;
1695                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1696                                 len);
1697                 memcpy(priv->ucode_init.v_addr, src, len);
1698                 src += len;
1699         }
1700
1701         /* Initialization data (4th block) */
1702         if (init_data_size) {
1703                 len = init_data_size;
1704                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1705                                len);
1706                 memcpy(priv->ucode_init_data.v_addr, src, len);
1707                 src += len;
1708         }
1709
1710         /* Bootstrap instructions (5th block) */
1711         len = boot_size;
1712         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1713         memcpy(priv->ucode_boot.v_addr, src, len);
1714
1715         /* We have our copies now, allow OS release its copies */
1716         release_firmware(ucode_raw);
1717         return 0;
1718
1719  err_pci_alloc:
1720         IWL_ERR(priv, "failed to allocate pci memory\n");
1721         ret = -ENOMEM;
1722         iwl_dealloc_ucode_pci(priv);
1723
1724  err_release:
1725         release_firmware(ucode_raw);
1726
1727  error:
1728         return ret;
1729 }
1730
1731 static const char *desc_lookup_text[] = {
1732         "OK",
1733         "FAIL",
1734         "BAD_PARAM",
1735         "BAD_CHECKSUM",
1736         "NMI_INTERRUPT_WDG",
1737         "SYSASSERT",
1738         "FATAL_ERROR",
1739         "BAD_COMMAND",
1740         "HW_ERROR_TUNE_LOCK",
1741         "HW_ERROR_TEMPERATURE",
1742         "ILLEGAL_CHAN_FREQ",
1743         "VCC_NOT_STABLE",
1744         "FH_ERROR",
1745         "NMI_INTERRUPT_HOST",
1746         "NMI_INTERRUPT_ACTION_PT",
1747         "NMI_INTERRUPT_UNKNOWN",
1748         "UCODE_VERSION_MISMATCH",
1749         "HW_ERROR_ABS_LOCK",
1750         "HW_ERROR_CAL_LOCK_FAIL",
1751         "NMI_INTERRUPT_INST_ACTION_PT",
1752         "NMI_INTERRUPT_DATA_ACTION_PT",
1753         "NMI_TRM_HW_ER",
1754         "NMI_INTERRUPT_TRM",
1755         "NMI_INTERRUPT_BREAK_POINT"
1756         "DEBUG_0",
1757         "DEBUG_1",
1758         "DEBUG_2",
1759         "DEBUG_3",
1760         "ADVANCED SYSASSERT"
1761 };
1762
1763 static const char *desc_lookup(int i)
1764 {
1765         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1766
1767         if (i < 0 || i > max)
1768                 i = max;
1769
1770         return desc_lookup_text[i];
1771 }
1772
1773 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1774 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1775
1776 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1777 {
1778         u32 data2, line;
1779         u32 desc, time, count, base, data1;
1780         u32 blink1, blink2, ilink1, ilink2;
1781
1782         if (priv->ucode_type == UCODE_INIT)
1783                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1784         else
1785                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1786
1787         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1788                 IWL_ERR(priv,
1789                         "Not valid error log pointer 0x%08X for %s uCode\n",
1790                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1791                 return;
1792         }
1793
1794         count = iwl_read_targ_mem(priv, base);
1795
1796         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1797                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1798                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1799                         priv->status, count);
1800         }
1801
1802         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1803         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1804         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1805         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1806         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1807         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1808         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1809         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1810         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1811
1812         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1813                                       blink1, blink2, ilink1, ilink2);
1814
1815         IWL_ERR(priv, "Desc                               Time       "
1816                 "data1      data2      line\n");
1817         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1818                 desc_lookup(desc), desc, time, data1, data2, line);
1819         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1820         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1821                 ilink1, ilink2);
1822
1823 }
1824
1825 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1826
1827 /**
1828  * iwl_print_event_log - Dump error event log to syslog
1829  *
1830  */
1831 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1832                                u32 num_events, u32 mode,
1833                                int pos, char **buf, size_t bufsz)
1834 {
1835         u32 i;
1836         u32 base;       /* SRAM byte address of event log header */
1837         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1838         u32 ptr;        /* SRAM byte address of log data */
1839         u32 ev, time, data; /* event log data */
1840         unsigned long reg_flags;
1841
1842         if (num_events == 0)
1843                 return pos;
1844         if (priv->ucode_type == UCODE_INIT)
1845                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1846         else
1847                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1848
1849         if (mode == 0)
1850                 event_size = 2 * sizeof(u32);
1851         else
1852                 event_size = 3 * sizeof(u32);
1853
1854         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1855
1856         /* Make sure device is powered up for SRAM reads */
1857         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1858         iwl_grab_nic_access(priv);
1859
1860         /* Set starting address; reads will auto-increment */
1861         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1862         rmb();
1863
1864         /* "time" is actually "data" for mode 0 (no timestamp).
1865         * place event id # at far right for easier visual parsing. */
1866         for (i = 0; i < num_events; i++) {
1867                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1868                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1869                 if (mode == 0) {
1870                         /* data, ev */
1871                         if (bufsz) {
1872                                 pos += scnprintf(*buf + pos, bufsz - pos,
1873                                                 "EVT_LOG:0x%08x:%04u\n",
1874                                                 time, ev);
1875                         } else {
1876                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1877                                         time, ev);
1878                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1879                                         time, ev);
1880                         }
1881                 } else {
1882                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1883                         if (bufsz) {
1884                                 pos += scnprintf(*buf + pos, bufsz - pos,
1885                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1886                                                  time, data, ev);
1887                         } else {
1888                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1889                                         time, data, ev);
1890                                 trace_iwlwifi_dev_ucode_event(priv, time,
1891                                         data, ev);
1892                         }
1893                 }
1894         }
1895
1896         /* Allow device to power down */
1897         iwl_release_nic_access(priv);
1898         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1899         return pos;
1900 }
1901
1902 /**
1903  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1904  */
1905 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1906                                     u32 num_wraps, u32 next_entry,
1907                                     u32 size, u32 mode,
1908                                     int pos, char **buf, size_t bufsz)
1909 {
1910         /*
1911          * display the newest DEFAULT_LOG_ENTRIES entries
1912          * i.e the entries just before the next ont that uCode would fill.
1913          */
1914         if (num_wraps) {
1915                 if (next_entry < size) {
1916                         pos = iwl_print_event_log(priv,
1917                                                 capacity - (size - next_entry),
1918                                                 size - next_entry, mode,
1919                                                 pos, buf, bufsz);
1920                         pos = iwl_print_event_log(priv, 0,
1921                                                   next_entry, mode,
1922                                                   pos, buf, bufsz);
1923                 } else
1924                         pos = iwl_print_event_log(priv, next_entry - size,
1925                                                   size, mode, pos, buf, bufsz);
1926         } else {
1927                 if (next_entry < size) {
1928                         pos = iwl_print_event_log(priv, 0, next_entry,
1929                                                   mode, pos, buf, bufsz);
1930                 } else {
1931                         pos = iwl_print_event_log(priv, next_entry - size,
1932                                                   size, mode, pos, buf, bufsz);
1933                 }
1934         }
1935         return pos;
1936 }
1937
1938 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1939 #define MAX_EVENT_LOG_SIZE (512)
1940
1941 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1942
1943 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1944                             char **buf, bool display)
1945 {
1946         u32 base;       /* SRAM byte address of event log header */
1947         u32 capacity;   /* event log capacity in # entries */
1948         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1949         u32 num_wraps;  /* # times uCode wrapped to top of log */
1950         u32 next_entry; /* index of next entry to be written by uCode */
1951         u32 size;       /* # entries that we'll print */
1952         int pos = 0;
1953         size_t bufsz = 0;
1954
1955         if (priv->ucode_type == UCODE_INIT)
1956                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1957         else
1958                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1959
1960         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1961                 IWL_ERR(priv,
1962                         "Invalid event log pointer 0x%08X for %s uCode\n",
1963                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1964                 return -EINVAL;
1965         }
1966
1967         /* event log header */
1968         capacity = iwl_read_targ_mem(priv, base);
1969         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1970         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1971         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1972
1973         if (capacity > MAX_EVENT_LOG_SIZE) {
1974                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1975                         capacity, MAX_EVENT_LOG_SIZE);
1976                 capacity = MAX_EVENT_LOG_SIZE;
1977         }
1978
1979         if (next_entry > MAX_EVENT_LOG_SIZE) {
1980                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1981                         next_entry, MAX_EVENT_LOG_SIZE);
1982                 next_entry = MAX_EVENT_LOG_SIZE;
1983         }
1984
1985         size = num_wraps ? capacity : next_entry;
1986
1987         /* bail out if nothing in log */
1988         if (size == 0) {
1989                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1990                 return pos;
1991         }
1992
1993 #ifdef CONFIG_IWLWIFI_DEBUG
1994         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1995                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1996                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1997 #else
1998         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1999                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2000 #endif
2001         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2002                 size);
2003
2004 #ifdef CONFIG_IWLWIFI_DEBUG
2005         if (display) {
2006                 if (full_log)
2007                         bufsz = capacity * 48;
2008                 else
2009                         bufsz = size * 48;
2010                 *buf = kmalloc(bufsz, GFP_KERNEL);
2011                 if (!*buf)
2012                         return -ENOMEM;
2013         }
2014         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2015                 /*
2016                  * if uCode has wrapped back to top of log,
2017                  * start at the oldest entry,
2018                  * i.e the next one that uCode would fill.
2019                  */
2020                 if (num_wraps)
2021                         pos = iwl_print_event_log(priv, next_entry,
2022                                                 capacity - next_entry, mode,
2023                                                 pos, buf, bufsz);
2024                 /* (then/else) start at top of log */
2025                 pos = iwl_print_event_log(priv, 0,
2026                                           next_entry, mode, pos, buf, bufsz);
2027         } else
2028                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2029                                                 next_entry, size, mode,
2030                                                 pos, buf, bufsz);
2031 #else
2032         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2033                                         next_entry, size, mode,
2034                                         pos, buf, bufsz);
2035 #endif
2036         return pos;
2037 }
2038
2039 /**
2040  * iwl_alive_start - called after REPLY_ALIVE notification received
2041  *                   from protocol/runtime uCode (initialization uCode's
2042  *                   Alive gets handled by iwl_init_alive_start()).
2043  */
2044 static void iwl_alive_start(struct iwl_priv *priv)
2045 {
2046         int ret = 0;
2047
2048         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2049
2050         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2051                 /* We had an error bringing up the hardware, so take it
2052                  * all the way back down so we can try again */
2053                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2054                 goto restart;
2055         }
2056
2057         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2058          * This is a paranoid check, because we would not have gotten the
2059          * "runtime" alive if code weren't properly loaded.  */
2060         if (iwl_verify_ucode(priv)) {
2061                 /* Runtime instruction load was bad;
2062                  * take it all the way back down so we can try again */
2063                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2064                 goto restart;
2065         }
2066
2067         iwl_clear_stations_table(priv);
2068         ret = priv->cfg->ops->lib->alive_notify(priv);
2069         if (ret) {
2070                 IWL_WARN(priv,
2071                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2072                 goto restart;
2073         }
2074
2075         /* After the ALIVE response, we can send host commands to the uCode */
2076         set_bit(STATUS_ALIVE, &priv->status);
2077
2078         if (iwl_is_rfkill(priv))
2079                 return;
2080
2081         ieee80211_wake_queues(priv->hw);
2082
2083         priv->active_rate = priv->rates_mask;
2084         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2085
2086         /* Configure Tx antenna selection based on H/W config */
2087         if (priv->cfg->ops->hcmd->set_tx_ant)
2088                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2089
2090         if (iwl_is_associated(priv)) {
2091                 struct iwl_rxon_cmd *active_rxon =
2092                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2093                 /* apply any changes in staging */
2094                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2095                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2096         } else {
2097                 /* Initialize our rx_config data */
2098                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2099
2100                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2101                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2102
2103                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2104         }
2105
2106         /* Configure Bluetooth device coexistence support */
2107         iwl_send_bt_config(priv);
2108
2109         iwl_reset_run_time_calib(priv);
2110
2111         /* Configure the adapter for unassociated operation */
2112         iwlcore_commit_rxon(priv);
2113
2114         /* At this point, the NIC is initialized and operational */
2115         iwl_rf_kill_ct_config(priv);
2116
2117         iwl_leds_init(priv);
2118
2119         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2120         set_bit(STATUS_READY, &priv->status);
2121         wake_up_interruptible(&priv->wait_command_queue);
2122
2123         iwl_power_update_mode(priv, true);
2124
2125         /* reassociate for ADHOC mode */
2126         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2127                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2128                                                                 priv->vif);
2129                 if (beacon)
2130                         iwl_mac_beacon_update(priv->hw, beacon);
2131         }
2132
2133
2134         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2135                 iwl_set_mode(priv, priv->iw_mode);
2136
2137         return;
2138
2139  restart:
2140         queue_work(priv->workqueue, &priv->restart);
2141 }
2142
2143 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2144
2145 static void __iwl_down(struct iwl_priv *priv)
2146 {
2147         unsigned long flags;
2148         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2149
2150         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2151
2152         if (!exit_pending)
2153                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2154
2155         iwl_clear_stations_table(priv);
2156
2157         /* Unblock any waiting calls */
2158         wake_up_interruptible_all(&priv->wait_command_queue);
2159
2160         /* Wipe out the EXIT_PENDING status bit if we are not actually
2161          * exiting the module */
2162         if (!exit_pending)
2163                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2164
2165         /* stop and reset the on-board processor */
2166         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2167
2168         /* tell the device to stop sending interrupts */
2169         spin_lock_irqsave(&priv->lock, flags);
2170         iwl_disable_interrupts(priv);
2171         spin_unlock_irqrestore(&priv->lock, flags);
2172         iwl_synchronize_irq(priv);
2173
2174         if (priv->mac80211_registered)
2175                 ieee80211_stop_queues(priv->hw);
2176
2177         /* If we have not previously called iwl_init() then
2178          * clear all bits but the RF Kill bit and return */
2179         if (!iwl_is_init(priv)) {
2180                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2181                                         STATUS_RF_KILL_HW |
2182                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2183                                         STATUS_GEO_CONFIGURED |
2184                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2185                                         STATUS_EXIT_PENDING;
2186                 goto exit;
2187         }
2188
2189         /* ...otherwise clear out all the status bits but the RF Kill
2190          * bit and continue taking the NIC down. */
2191         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2192                                 STATUS_RF_KILL_HW |
2193                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2194                                 STATUS_GEO_CONFIGURED |
2195                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2196                                 STATUS_FW_ERROR |
2197                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2198                                 STATUS_EXIT_PENDING;
2199
2200         /* device going down, Stop using ICT table */
2201         iwl_disable_ict(priv);
2202
2203         iwl_txq_ctx_stop(priv);
2204         iwl_rxq_stop(priv);
2205
2206         /* Power-down device's busmaster DMA clocks */
2207         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2208         udelay(5);
2209
2210         /* Make sure (redundant) we've released our request to stay awake */
2211         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2212
2213         /* Stop the device, and put it in low power state */
2214         priv->cfg->ops->lib->apm_ops.stop(priv);
2215
2216  exit:
2217         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2218
2219         if (priv->ibss_beacon)
2220                 dev_kfree_skb(priv->ibss_beacon);
2221         priv->ibss_beacon = NULL;
2222
2223         /* clear out any free frames */
2224         iwl_clear_free_frames(priv);
2225 }
2226
2227 static void iwl_down(struct iwl_priv *priv)
2228 {
2229         mutex_lock(&priv->mutex);
2230         __iwl_down(priv);
2231         mutex_unlock(&priv->mutex);
2232
2233         iwl_cancel_deferred_work(priv);
2234 }
2235
2236 #define HW_READY_TIMEOUT (50)
2237
2238 static int iwl_set_hw_ready(struct iwl_priv *priv)
2239 {
2240         int ret = 0;
2241
2242         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2243                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2244
2245         /* See if we got it */
2246         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2247                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2248                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2249                                 HW_READY_TIMEOUT);
2250         if (ret != -ETIMEDOUT)
2251                 priv->hw_ready = true;
2252         else
2253                 priv->hw_ready = false;
2254
2255         IWL_DEBUG_INFO(priv, "hardware %s\n",
2256                       (priv->hw_ready == 1) ? "ready" : "not ready");
2257         return ret;
2258 }
2259
2260 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2261 {
2262         int ret = 0;
2263
2264         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2265
2266         ret = iwl_set_hw_ready(priv);
2267         if (priv->hw_ready)
2268                 return ret;
2269
2270         /* If HW is not ready, prepare the conditions to check again */
2271         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2272                         CSR_HW_IF_CONFIG_REG_PREPARE);
2273
2274         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2275                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2276                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2277
2278         /* HW should be ready by now, check again. */
2279         if (ret != -ETIMEDOUT)
2280                 iwl_set_hw_ready(priv);
2281
2282         return ret;
2283 }
2284
2285 #define MAX_HW_RESTARTS 5
2286
2287 static int __iwl_up(struct iwl_priv *priv)
2288 {
2289         int i;
2290         int ret;
2291
2292         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2293                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2294                 return -EIO;
2295         }
2296
2297         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2298                 IWL_ERR(priv, "ucode not available for device bringup\n");
2299                 return -EIO;
2300         }
2301
2302         iwl_prepare_card_hw(priv);
2303
2304         if (!priv->hw_ready) {
2305                 IWL_WARN(priv, "Exit HW not ready\n");
2306                 return -EIO;
2307         }
2308
2309         /* If platform's RF_KILL switch is NOT set to KILL */
2310         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2311                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2312         else
2313                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2314
2315         if (iwl_is_rfkill(priv)) {
2316                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2317
2318                 iwl_enable_interrupts(priv);
2319                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2320                 return 0;
2321         }
2322
2323         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2324
2325         ret = iwl_hw_nic_init(priv);
2326         if (ret) {
2327                 IWL_ERR(priv, "Unable to init nic\n");
2328                 return ret;
2329         }
2330
2331         /* make sure rfkill handshake bits are cleared */
2332         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2333         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2334                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2335
2336         /* clear (again), then enable host interrupts */
2337         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2338         iwl_enable_interrupts(priv);
2339
2340         /* really make sure rfkill handshake bits are cleared */
2341         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2342         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2343
2344         /* Copy original ucode data image from disk into backup cache.
2345          * This will be used to initialize the on-board processor's
2346          * data SRAM for a clean start when the runtime program first loads. */
2347         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2348                priv->ucode_data.len);
2349
2350         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2351
2352                 iwl_clear_stations_table(priv);
2353
2354                 /* load bootstrap state machine,
2355                  * load bootstrap program into processor's memory,
2356                  * prepare to load the "initialize" uCode */
2357                 ret = priv->cfg->ops->lib->load_ucode(priv);
2358
2359                 if (ret) {
2360                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2361                                 ret);
2362                         continue;
2363                 }
2364
2365                 /* start card; "initialize" will load runtime ucode */
2366                 iwl_nic_start(priv);
2367
2368                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2369
2370                 return 0;
2371         }
2372
2373         set_bit(STATUS_EXIT_PENDING, &priv->status);
2374         __iwl_down(priv);
2375         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2376
2377         /* tried to restart and config the device for as long as our
2378          * patience could withstand */
2379         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2380         return -EIO;
2381 }
2382
2383
2384 /*****************************************************************************
2385  *
2386  * Workqueue callbacks
2387  *
2388  *****************************************************************************/
2389
2390 static void iwl_bg_init_alive_start(struct work_struct *data)
2391 {
2392         struct iwl_priv *priv =
2393             container_of(data, struct iwl_priv, init_alive_start.work);
2394
2395         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2396                 return;
2397
2398         mutex_lock(&priv->mutex);
2399         priv->cfg->ops->lib->init_alive_start(priv);
2400         mutex_unlock(&priv->mutex);
2401 }
2402
2403 static void iwl_bg_alive_start(struct work_struct *data)
2404 {
2405         struct iwl_priv *priv =
2406             container_of(data, struct iwl_priv, alive_start.work);
2407
2408         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2409                 return;
2410
2411         /* enable dram interrupt */
2412         iwl_reset_ict(priv);
2413
2414         mutex_lock(&priv->mutex);
2415         iwl_alive_start(priv);
2416         mutex_unlock(&priv->mutex);
2417 }
2418
2419 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2420 {
2421         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2422                         run_time_calib_work);
2423
2424         mutex_lock(&priv->mutex);
2425
2426         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2427             test_bit(STATUS_SCANNING, &priv->status)) {
2428                 mutex_unlock(&priv->mutex);
2429                 return;
2430         }
2431
2432         if (priv->start_calib) {
2433                 iwl_chain_noise_calibration(priv, &priv->statistics);
2434
2435                 iwl_sensitivity_calibration(priv, &priv->statistics);
2436         }
2437
2438         mutex_unlock(&priv->mutex);
2439         return;
2440 }
2441
2442 static void iwl_bg_restart(struct work_struct *data)
2443 {
2444         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2445
2446         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2447                 return;
2448
2449         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2450                 mutex_lock(&priv->mutex);
2451                 priv->vif = NULL;
2452                 priv->is_open = 0;
2453                 mutex_unlock(&priv->mutex);
2454                 iwl_down(priv);
2455                 ieee80211_restart_hw(priv->hw);
2456         } else {
2457                 iwl_down(priv);
2458
2459                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2460                         return;
2461
2462                 mutex_lock(&priv->mutex);
2463                 __iwl_up(priv);
2464                 mutex_unlock(&priv->mutex);
2465         }
2466 }
2467
2468 static void iwl_bg_rx_replenish(struct work_struct *data)
2469 {
2470         struct iwl_priv *priv =
2471             container_of(data, struct iwl_priv, rx_replenish);
2472
2473         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2474                 return;
2475
2476         mutex_lock(&priv->mutex);
2477         iwl_rx_replenish(priv);
2478         mutex_unlock(&priv->mutex);
2479 }
2480
2481 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2482
2483 void iwl_post_associate(struct iwl_priv *priv)
2484 {
2485         struct ieee80211_conf *conf = NULL;
2486         int ret = 0;
2487         unsigned long flags;
2488
2489         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2490                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2491                 return;
2492         }
2493
2494         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2495                         priv->assoc_id, priv->active_rxon.bssid_addr);
2496
2497
2498         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2499                 return;
2500
2501
2502         if (!priv->vif || !priv->is_open)
2503                 return;
2504
2505         iwl_scan_cancel_timeout(priv, 200);
2506
2507         conf = ieee80211_get_hw_conf(priv->hw);
2508
2509         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2510         iwlcore_commit_rxon(priv);
2511
2512         iwl_setup_rxon_timing(priv);
2513         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2514                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2515         if (ret)
2516                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2517                             "Attempting to continue.\n");
2518
2519         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2520
2521         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2522
2523         if (priv->cfg->ops->hcmd->set_rxon_chain)
2524                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2525
2526         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2527
2528         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2529                         priv->assoc_id, priv->beacon_int);
2530
2531         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2532                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2533         else
2534                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2535
2536         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2537                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2538                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2539                 else
2540                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2541
2542                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2543                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2544
2545         }
2546
2547         iwlcore_commit_rxon(priv);
2548
2549         switch (priv->iw_mode) {
2550         case NL80211_IFTYPE_STATION:
2551                 break;
2552
2553         case NL80211_IFTYPE_ADHOC:
2554
2555                 /* assume default assoc id */
2556                 priv->assoc_id = 1;
2557
2558                 iwl_rxon_add_station(priv, priv->bssid, 0);
2559                 iwl_send_beacon_cmd(priv);
2560
2561                 break;
2562
2563         default:
2564                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2565                           __func__, priv->iw_mode);
2566                 break;
2567         }
2568
2569         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2570                 priv->assoc_station_added = 1;
2571
2572         spin_lock_irqsave(&priv->lock, flags);
2573         iwl_activate_qos(priv, 0);
2574         spin_unlock_irqrestore(&priv->lock, flags);
2575
2576         /* the chain noise calibration will enabled PM upon completion
2577          * If chain noise has already been run, then we need to enable
2578          * power management here */
2579         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2580                 iwl_power_update_mode(priv, false);
2581
2582         /* Enable Rx differential gain and sensitivity calibrations */
2583         iwl_chain_noise_reset(priv);
2584         priv->start_calib = 1;
2585
2586 }
2587
2588 /*****************************************************************************
2589  *
2590  * mac80211 entry point functions
2591  *
2592  *****************************************************************************/
2593
2594 #define UCODE_READY_TIMEOUT     (4 * HZ)
2595
2596 /*
2597  * Not a mac80211 entry point function, but it fits in with all the
2598  * other mac80211 functions grouped here.
2599  */
2600 static int iwl_mac_setup_register(struct iwl_priv *priv)
2601 {
2602         int ret;
2603         struct ieee80211_hw *hw = priv->hw;
2604         hw->rate_control_algorithm = "iwl-agn-rs";
2605
2606         /* Tell mac80211 our characteristics */
2607         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2608                     IEEE80211_HW_NOISE_DBM |
2609                     IEEE80211_HW_AMPDU_AGGREGATION |
2610                     IEEE80211_HW_SPECTRUM_MGMT;
2611
2612         if (!priv->cfg->broken_powersave)
2613                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2614                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2615
2616         if (priv->cfg->sku & IWL_SKU_N)
2617                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2618                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2619
2620         hw->sta_data_size = sizeof(struct iwl_station_priv);
2621         hw->wiphy->interface_modes =
2622                 BIT(NL80211_IFTYPE_STATION) |
2623                 BIT(NL80211_IFTYPE_ADHOC);
2624
2625         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2626                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2627
2628         /*
2629          * For now, disable PS by default because it affects
2630          * RX performance significantly.
2631          */
2632         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2633
2634         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX + 1;
2635         /* we create the 802.11 header and a zero-length SSID element */
2636         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2637
2638         /* Default value; 4 EDCA QOS priorities */
2639         hw->queues = 4;
2640
2641         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2642
2643         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2644                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2645                         &priv->bands[IEEE80211_BAND_2GHZ];
2646         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2647                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2648                         &priv->bands[IEEE80211_BAND_5GHZ];
2649
2650         ret = ieee80211_register_hw(priv->hw);
2651         if (ret) {
2652                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2653                 return ret;
2654         }
2655         priv->mac80211_registered = 1;
2656
2657         return 0;
2658 }
2659
2660
2661 static int iwl_mac_start(struct ieee80211_hw *hw)
2662 {
2663         struct iwl_priv *priv = hw->priv;
2664         int ret;
2665
2666         IWL_DEBUG_MAC80211(priv, "enter\n");
2667
2668         /* we should be verifying the device is ready to be opened */
2669         mutex_lock(&priv->mutex);
2670
2671         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2672          * ucode filename and max sizes are card-specific. */
2673
2674         if (!priv->ucode_code.len) {
2675                 ret = iwl_read_ucode(priv);
2676                 if (ret) {
2677                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2678                         mutex_unlock(&priv->mutex);
2679                         return ret;
2680                 }
2681         }
2682
2683         ret = __iwl_up(priv);
2684
2685         mutex_unlock(&priv->mutex);
2686
2687         if (ret)
2688                 return ret;
2689
2690         if (iwl_is_rfkill(priv))
2691                 goto out;
2692
2693         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2694
2695         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2696          * mac80211 will not be run successfully. */
2697         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2698                         test_bit(STATUS_READY, &priv->status),
2699                         UCODE_READY_TIMEOUT);
2700         if (!ret) {
2701                 if (!test_bit(STATUS_READY, &priv->status)) {
2702                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2703                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2704                         return -ETIMEDOUT;
2705                 }
2706         }
2707
2708         iwl_led_start(priv);
2709
2710 out:
2711         priv->is_open = 1;
2712         IWL_DEBUG_MAC80211(priv, "leave\n");
2713         return 0;
2714 }
2715
2716 static void iwl_mac_stop(struct ieee80211_hw *hw)
2717 {
2718         struct iwl_priv *priv = hw->priv;
2719
2720         IWL_DEBUG_MAC80211(priv, "enter\n");
2721
2722         if (!priv->is_open)
2723                 return;
2724
2725         priv->is_open = 0;
2726
2727         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2728                 /* stop mac, cancel any scan request and clear
2729                  * RXON_FILTER_ASSOC_MSK BIT
2730                  */
2731                 mutex_lock(&priv->mutex);
2732                 iwl_scan_cancel_timeout(priv, 100);
2733                 mutex_unlock(&priv->mutex);
2734         }
2735
2736         iwl_down(priv);
2737
2738         flush_workqueue(priv->workqueue);
2739
2740         /* enable interrupts again in order to receive rfkill changes */
2741         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2742         iwl_enable_interrupts(priv);
2743
2744         IWL_DEBUG_MAC80211(priv, "leave\n");
2745 }
2746
2747 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2748 {
2749         struct iwl_priv *priv = hw->priv;
2750
2751         IWL_DEBUG_MACDUMP(priv, "enter\n");
2752
2753         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2754                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2755
2756         if (iwl_tx_skb(priv, skb))
2757                 dev_kfree_skb_any(skb);
2758
2759         IWL_DEBUG_MACDUMP(priv, "leave\n");
2760         return NETDEV_TX_OK;
2761 }
2762
2763 void iwl_config_ap(struct iwl_priv *priv)
2764 {
2765         int ret = 0;
2766         unsigned long flags;
2767
2768         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2769                 return;
2770
2771         /* The following should be done only at AP bring up */
2772         if (!iwl_is_associated(priv)) {
2773
2774                 /* RXON - unassoc (to set timing command) */
2775                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2776                 iwlcore_commit_rxon(priv);
2777
2778                 /* RXON Timing */
2779                 iwl_setup_rxon_timing(priv);
2780                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2781                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2782                 if (ret)
2783                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2784                                         "Attempting to continue.\n");
2785
2786                 /* AP has all antennas */
2787                 priv->chain_noise_data.active_chains =
2788                         priv->hw_params.valid_rx_ant;
2789                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2790                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2791                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2792
2793                 /* FIXME: what should be the assoc_id for AP? */
2794                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2795                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2796                         priv->staging_rxon.flags |=
2797                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2798                 else
2799                         priv->staging_rxon.flags &=
2800                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2801
2802                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2803                         if (priv->assoc_capability &
2804                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2805                                 priv->staging_rxon.flags |=
2806                                         RXON_FLG_SHORT_SLOT_MSK;
2807                         else
2808                                 priv->staging_rxon.flags &=
2809                                         ~RXON_FLG_SHORT_SLOT_MSK;
2810
2811                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2812                                 priv->staging_rxon.flags &=
2813                                         ~RXON_FLG_SHORT_SLOT_MSK;
2814                 }
2815                 /* restore RXON assoc */
2816                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2817                 iwlcore_commit_rxon(priv);
2818                 iwl_reset_qos(priv);
2819                 spin_lock_irqsave(&priv->lock, flags);
2820                 iwl_activate_qos(priv, 1);
2821                 spin_unlock_irqrestore(&priv->lock, flags);
2822                 iwl_add_bcast_station(priv);
2823         }
2824         iwl_send_beacon_cmd(priv);
2825
2826         /* FIXME - we need to add code here to detect a totally new
2827          * configuration, reset the AP, unassoc, rxon timing, assoc,
2828          * clear sta table, add BCAST sta... */
2829 }
2830
2831 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2832                                     struct ieee80211_vif *vif,
2833                                     struct ieee80211_key_conf *keyconf,
2834                                     struct ieee80211_sta *sta,
2835                                     u32 iv32, u16 *phase1key)
2836 {
2837
2838         struct iwl_priv *priv = hw->priv;
2839         IWL_DEBUG_MAC80211(priv, "enter\n");
2840
2841         iwl_update_tkip_key(priv, keyconf,
2842                             sta ? sta->addr : iwl_bcast_addr,
2843                             iv32, phase1key);
2844
2845         IWL_DEBUG_MAC80211(priv, "leave\n");
2846 }
2847
2848 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2849                            struct ieee80211_vif *vif,
2850                            struct ieee80211_sta *sta,
2851                            struct ieee80211_key_conf *key)
2852 {
2853         struct iwl_priv *priv = hw->priv;
2854         const u8 *addr;
2855         int ret;
2856         u8 sta_id;
2857         bool is_default_wep_key = false;
2858
2859         IWL_DEBUG_MAC80211(priv, "enter\n");
2860
2861         if (priv->cfg->mod_params->sw_crypto) {
2862                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2863                 return -EOPNOTSUPP;
2864         }
2865         addr = sta ? sta->addr : iwl_bcast_addr;
2866         sta_id = iwl_find_station(priv, addr);
2867         if (sta_id == IWL_INVALID_STATION) {
2868                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2869                                    addr);
2870                 return -EINVAL;
2871
2872         }
2873
2874         mutex_lock(&priv->mutex);
2875         iwl_scan_cancel_timeout(priv, 100);
2876         mutex_unlock(&priv->mutex);
2877
2878         /* If we are getting WEP group key and we didn't receive any key mapping
2879          * so far, we are in legacy wep mode (group key only), otherwise we are
2880          * in 1X mode.
2881          * In legacy wep mode, we use another host command to the uCode */
2882         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2883                 priv->iw_mode != NL80211_IFTYPE_AP) {
2884                 if (cmd == SET_KEY)
2885                         is_default_wep_key = !priv->key_mapping_key;
2886                 else
2887                         is_default_wep_key =
2888                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2889         }
2890
2891         switch (cmd) {
2892         case SET_KEY:
2893                 if (is_default_wep_key)
2894                         ret = iwl_set_default_wep_key(priv, key);
2895                 else
2896                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2897
2898                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2899                 break;
2900         case DISABLE_KEY:
2901                 if (is_default_wep_key)
2902                         ret = iwl_remove_default_wep_key(priv, key);
2903                 else
2904                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2905
2906                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2907                 break;
2908         default:
2909                 ret = -EINVAL;
2910         }
2911
2912         IWL_DEBUG_MAC80211(priv, "leave\n");
2913
2914         return ret;
2915 }
2916
2917 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2918                                 struct ieee80211_vif *vif,
2919                              enum ieee80211_ampdu_mlme_action action,
2920                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2921 {
2922         struct iwl_priv *priv = hw->priv;
2923         int ret;
2924
2925         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2926                      sta->addr, tid);
2927
2928         if (!(priv->cfg->sku & IWL_SKU_N))
2929                 return -EACCES;
2930
2931         switch (action) {
2932         case IEEE80211_AMPDU_RX_START:
2933                 IWL_DEBUG_HT(priv, "start Rx\n");
2934                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2935         case IEEE80211_AMPDU_RX_STOP:
2936                 IWL_DEBUG_HT(priv, "stop Rx\n");
2937                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2938                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2939                         return 0;
2940                 else
2941                         return ret;
2942         case IEEE80211_AMPDU_TX_START:
2943                 IWL_DEBUG_HT(priv, "start Tx\n");
2944                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2945         case IEEE80211_AMPDU_TX_STOP:
2946                 IWL_DEBUG_HT(priv, "stop Tx\n");
2947                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2948                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2949                         return 0;
2950                 else
2951                         return ret;
2952         case IEEE80211_AMPDU_TX_OPERATIONAL:
2953                 /* do nothing */
2954                 return -EOPNOTSUPP;
2955         default:
2956                 IWL_DEBUG_HT(priv, "unknown\n");
2957                 return -EINVAL;
2958                 break;
2959         }
2960         return 0;
2961 }
2962
2963 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2964                              struct ieee80211_low_level_stats *stats)
2965 {
2966         struct iwl_priv *priv = hw->priv;
2967
2968         priv = hw->priv;
2969         IWL_DEBUG_MAC80211(priv, "enter\n");
2970         IWL_DEBUG_MAC80211(priv, "leave\n");
2971
2972         return 0;
2973 }
2974
2975 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2976                                struct ieee80211_vif *vif,
2977                                enum sta_notify_cmd cmd,
2978                                struct ieee80211_sta *sta)
2979 {
2980         struct iwl_priv *priv = hw->priv;
2981         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2982         int sta_id;
2983
2984         /*
2985          * TODO: We really should use this callback to
2986          *       actually maintain the station table in
2987          *       the device.
2988          */
2989
2990         switch (cmd) {
2991         case STA_NOTIFY_ADD:
2992                 atomic_set(&sta_priv->pending_frames, 0);
2993                 if (vif->type == NL80211_IFTYPE_AP)
2994                         sta_priv->client = true;
2995                 break;
2996         case STA_NOTIFY_SLEEP:
2997                 WARN_ON(!sta_priv->client);
2998                 sta_priv->asleep = true;
2999                 if (atomic_read(&sta_priv->pending_frames) > 0)
3000                         ieee80211_sta_block_awake(hw, sta, true);
3001                 break;
3002         case STA_NOTIFY_AWAKE:
3003                 WARN_ON(!sta_priv->client);
3004                 if (!sta_priv->asleep)
3005                         break;
3006                 sta_priv->asleep = false;
3007                 sta_id = iwl_find_station(priv, sta->addr);
3008                 if (sta_id != IWL_INVALID_STATION)
3009                         iwl_sta_modify_ps_wake(priv, sta_id);
3010                 break;
3011         default:
3012                 break;
3013         }
3014 }
3015
3016 /*****************************************************************************
3017  *
3018  * sysfs attributes
3019  *
3020  *****************************************************************************/
3021
3022 #ifdef CONFIG_IWLWIFI_DEBUG
3023
3024 /*
3025  * The following adds a new attribute to the sysfs representation
3026  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3027  * used for controlling the debug level.
3028  *
3029  * See the level definitions in iwl for details.
3030  *
3031  * The debug_level being managed using sysfs below is a per device debug
3032  * level that is used instead of the global debug level if it (the per
3033  * device debug level) is set.
3034  */
3035 static ssize_t show_debug_level(struct device *d,
3036                                 struct device_attribute *attr, char *buf)
3037 {
3038         struct iwl_priv *priv = dev_get_drvdata(d);
3039         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3040 }
3041 static ssize_t store_debug_level(struct device *d,
3042                                 struct device_attribute *attr,
3043                                  const char *buf, size_t count)
3044 {
3045         struct iwl_priv *priv = dev_get_drvdata(d);
3046         unsigned long val;
3047         int ret;
3048
3049         ret = strict_strtoul(buf, 0, &val);
3050         if (ret)
3051                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3052         else {
3053                 priv->debug_level = val;
3054                 if (iwl_alloc_traffic_mem(priv))
3055                         IWL_ERR(priv,
3056                                 "Not enough memory to generate traffic log\n");
3057         }
3058         return strnlen(buf, count);
3059 }
3060
3061 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3062                         show_debug_level, store_debug_level);
3063
3064
3065 #endif /* CONFIG_IWLWIFI_DEBUG */
3066
3067
3068 static ssize_t show_temperature(struct device *d,
3069                                 struct device_attribute *attr, char *buf)
3070 {
3071         struct iwl_priv *priv = dev_get_drvdata(d);
3072
3073         if (!iwl_is_alive(priv))
3074                 return -EAGAIN;
3075
3076         return sprintf(buf, "%d\n", priv->temperature);
3077 }
3078
3079 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3080
3081 static ssize_t show_tx_power(struct device *d,
3082                              struct device_attribute *attr, char *buf)
3083 {
3084         struct iwl_priv *priv = dev_get_drvdata(d);
3085
3086         if (!iwl_is_ready_rf(priv))
3087                 return sprintf(buf, "off\n");
3088         else
3089                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3090 }
3091
3092 static ssize_t store_tx_power(struct device *d,
3093                               struct device_attribute *attr,
3094                               const char *buf, size_t count)
3095 {
3096         struct iwl_priv *priv = dev_get_drvdata(d);
3097         unsigned long val;
3098         int ret;
3099
3100         ret = strict_strtoul(buf, 10, &val);
3101         if (ret)
3102                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3103         else {
3104                 ret = iwl_set_tx_power(priv, val, false);
3105                 if (ret)
3106                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
3107                                 ret);
3108                 else
3109                         ret = count;
3110         }
3111         return ret;
3112 }
3113
3114 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3115
3116 static ssize_t show_flags(struct device *d,
3117                           struct device_attribute *attr, char *buf)
3118 {
3119         struct iwl_priv *priv = dev_get_drvdata(d);
3120
3121         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3122 }
3123
3124 static ssize_t store_flags(struct device *d,
3125                            struct device_attribute *attr,
3126                            const char *buf, size_t count)
3127 {
3128         struct iwl_priv *priv = dev_get_drvdata(d);
3129         unsigned long val;
3130         u32 flags;
3131         int ret = strict_strtoul(buf, 0, &val);
3132         if (ret)
3133                 return ret;
3134         flags = (u32)val;
3135
3136         mutex_lock(&priv->mutex);
3137         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3138                 /* Cancel any currently running scans... */
3139                 if (iwl_scan_cancel_timeout(priv, 100))
3140                         IWL_WARN(priv, "Could not cancel scan.\n");
3141                 else {
3142                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3143                         priv->staging_rxon.flags = cpu_to_le32(flags);
3144                         iwlcore_commit_rxon(priv);
3145                 }
3146         }
3147         mutex_unlock(&priv->mutex);
3148
3149         return count;
3150 }
3151
3152 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3153
3154 static ssize_t show_filter_flags(struct device *d,
3155                                  struct device_attribute *attr, char *buf)
3156 {
3157         struct iwl_priv *priv = dev_get_drvdata(d);
3158
3159         return sprintf(buf, "0x%04X\n",
3160                 le32_to_cpu(priv->active_rxon.filter_flags));
3161 }
3162
3163 static ssize_t store_filter_flags(struct device *d,
3164                                   struct device_attribute *attr,
3165                                   const char *buf, size_t count)
3166 {
3167         struct iwl_priv *priv = dev_get_drvdata(d);
3168         unsigned long val;
3169         u32 filter_flags;
3170         int ret = strict_strtoul(buf, 0, &val);
3171         if (ret)
3172                 return ret;
3173         filter_flags = (u32)val;
3174
3175         mutex_lock(&priv->mutex);
3176         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3177                 /* Cancel any currently running scans... */
3178                 if (iwl_scan_cancel_timeout(priv, 100))
3179                         IWL_WARN(priv, "Could not cancel scan.\n");
3180                 else {
3181                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3182                                        "0x%04X\n", filter_flags);
3183                         priv->staging_rxon.filter_flags =
3184                                 cpu_to_le32(filter_flags);
3185                         iwlcore_commit_rxon(priv);
3186                 }
3187         }
3188         mutex_unlock(&priv->mutex);
3189
3190         return count;
3191 }
3192
3193 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3194                    store_filter_flags);
3195
3196
3197 static ssize_t show_statistics(struct device *d,
3198                                struct device_attribute *attr, char *buf)
3199 {
3200         struct iwl_priv *priv = dev_get_drvdata(d);
3201         u32 size = sizeof(struct iwl_notif_statistics);
3202         u32 len = 0, ofs = 0;
3203         u8 *data = (u8 *)&priv->statistics;
3204         int rc = 0;
3205
3206         if (!iwl_is_alive(priv))
3207                 return -EAGAIN;
3208
3209         mutex_lock(&priv->mutex);
3210         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3211         mutex_unlock(&priv->mutex);
3212
3213         if (rc) {
3214                 len = sprintf(buf,
3215                               "Error sending statistics request: 0x%08X\n", rc);
3216         &