Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
4  *
5  * Portions of this file are derived from the ipw3945 project, as well
6  * as portions of the ieee80211 subsystem header files.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of version 2 of the GNU General Public License as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20  *
21  * The full GNU General Public License is included in this distribution in the
22  * file called LICENSE.
23  *
24  * Contact Information:
25  *  Intel Linux Wireless <ilw@linux.intel.com>
26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27  *
28  *****************************************************************************/
29
30 #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 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1467 static int iwl_mac_setup_register(struct iwl_priv *priv);
1468
1469 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1470 {
1471         const char *name_pre = priv->cfg->fw_name_pre;
1472
1473         if (first)
1474                 priv->fw_index = priv->cfg->ucode_api_max;
1475         else
1476                 priv->fw_index--;
1477
1478         if (priv->fw_index < priv->cfg->ucode_api_min) {
1479                 IWL_ERR(priv, "no suitable firmware found!\n");
1480                 return -ENOENT;
1481         }
1482
1483         sprintf(priv->firmware_name, "%s%d%s",
1484                 name_pre, priv->fw_index, ".ucode");
1485
1486         IWL_DEBUG_INFO(priv, "attempting to load firmware '%s'\n",
1487                        priv->firmware_name);
1488
1489         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1490                                        &priv->pci_dev->dev, GFP_KERNEL, priv,
1491                                        iwl_ucode_callback);
1492 }
1493
1494 /**
1495  * iwl_ucode_callback - callback when firmware was loaded
1496  *
1497  * If loaded successfully, copies the firmware into buffers
1498  * for the card to fetch (via DMA).
1499  */
1500 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1501 {
1502         struct iwl_priv *priv = context;
1503         struct iwl_ucode_header *ucode;
1504         const unsigned int api_max = priv->cfg->ucode_api_max;
1505         const unsigned int api_min = priv->cfg->ucode_api_min;
1506         u8 *src;
1507         size_t len;
1508         u32 api_ver, build;
1509         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1510         int err;
1511         u16 eeprom_ver;
1512
1513         if (!ucode_raw) {
1514                 IWL_ERR(priv, "request for firmware file '%s' failed.\n",
1515                         priv->firmware_name);
1516                 goto try_again;
1517         }
1518
1519         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1520                        priv->firmware_name, ucode_raw->size);
1521
1522         /* Make sure that we got at least the v1 header! */
1523         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1524                 IWL_ERR(priv, "File size way too small!\n");
1525                 goto try_again;
1526         }
1527
1528         /* Data from ucode file:  header followed by uCode images */
1529         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1530
1531         priv->ucode_ver = le32_to_cpu(ucode->ver);
1532         api_ver = IWL_UCODE_API(priv->ucode_ver);
1533         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1534         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1535         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1536         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1537         init_data_size =
1538                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1539         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1540         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1541
1542         /* api_ver should match the api version forming part of the
1543          * firmware filename ... but we don't check for that and only rely
1544          * on the API version read from firmware header from here on forward */
1545
1546         if (api_ver < api_min || api_ver > api_max) {
1547                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1548                           "Driver supports v%u, firmware is v%u.\n",
1549                           api_max, api_ver);
1550                 goto try_again;
1551         }
1552
1553         if (api_ver != api_max)
1554                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1555                           "got v%u. New firmware can be obtained "
1556                           "from http://www.intellinuxwireless.org.\n",
1557                           api_max, api_ver);
1558
1559         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1560                IWL_UCODE_MAJOR(priv->ucode_ver),
1561                IWL_UCODE_MINOR(priv->ucode_ver),
1562                IWL_UCODE_API(priv->ucode_ver),
1563                IWL_UCODE_SERIAL(priv->ucode_ver));
1564
1565         snprintf(priv->hw->wiphy->fw_version,
1566                  sizeof(priv->hw->wiphy->fw_version),
1567                  "%u.%u.%u.%u",
1568                  IWL_UCODE_MAJOR(priv->ucode_ver),
1569                  IWL_UCODE_MINOR(priv->ucode_ver),
1570                  IWL_UCODE_API(priv->ucode_ver),
1571                  IWL_UCODE_SERIAL(priv->ucode_ver));
1572
1573         if (build)
1574                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1575
1576         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1577         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1578                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1579                        ? "OTP" : "EEPROM", eeprom_ver);
1580
1581         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1582                        priv->ucode_ver);
1583         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1584                        inst_size);
1585         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1586                        data_size);
1587         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1588                        init_size);
1589         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1590                        init_data_size);
1591         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1592                        boot_size);
1593
1594         /*
1595          * For any of the failures below (before allocating pci memory)
1596          * we will try to load a version with a smaller API -- maybe the
1597          * user just got a corrupted version of the latest API.
1598          */
1599
1600         /* Verify size of file vs. image size info in file's header */
1601         if (ucode_raw->size !=
1602                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1603                 inst_size + data_size + init_size +
1604                 init_data_size + boot_size) {
1605
1606                 IWL_DEBUG_INFO(priv,
1607                         "uCode file size %d does not match expected size\n",
1608                         (int)ucode_raw->size);
1609                 goto try_again;
1610         }
1611
1612         /* Verify that uCode images will fit in card's SRAM */
1613         if (inst_size > priv->hw_params.max_inst_size) {
1614                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1615                                inst_size);
1616                 goto try_again;
1617         }
1618
1619         if (data_size > priv->hw_params.max_data_size) {
1620                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1621                                 data_size);
1622                 goto try_again;
1623         }
1624         if (init_size > priv->hw_params.max_inst_size) {
1625                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1626                         init_size);
1627                 goto try_again;
1628         }
1629         if (init_data_size > priv->hw_params.max_data_size) {
1630                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1631                       init_data_size);
1632                 goto try_again;
1633         }
1634         if (boot_size > priv->hw_params.max_bsm_size) {
1635                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1636                         boot_size);
1637                 goto try_again;
1638         }
1639
1640         /* Allocate ucode buffers for card's bus-master loading ... */
1641
1642         /* Runtime instructions and 2 copies of data:
1643          * 1) unmodified from disk
1644          * 2) backup cache for save/restore during power-downs */
1645         priv->ucode_code.len = inst_size;
1646         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1647
1648         priv->ucode_data.len = data_size;
1649         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1650
1651         priv->ucode_data_backup.len = data_size;
1652         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1653
1654         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1655             !priv->ucode_data_backup.v_addr)
1656                 goto err_pci_alloc;
1657
1658         /* Initialization instructions and data */
1659         if (init_size && init_data_size) {
1660                 priv->ucode_init.len = init_size;
1661                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1662
1663                 priv->ucode_init_data.len = init_data_size;
1664                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1665
1666                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1667                         goto err_pci_alloc;
1668         }
1669
1670         /* Bootstrap (instructions only, no data) */
1671         if (boot_size) {
1672                 priv->ucode_boot.len = boot_size;
1673                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1674
1675                 if (!priv->ucode_boot.v_addr)
1676                         goto err_pci_alloc;
1677         }
1678
1679         /* Copy images into buffers for card's bus-master reads ... */
1680
1681         /* Runtime instructions (first block of data in file) */
1682         len = inst_size;
1683         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1684         memcpy(priv->ucode_code.v_addr, src, len);
1685         src += len;
1686
1687         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1688                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1689
1690         /* Runtime data (2nd block)
1691          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1692         len = data_size;
1693         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1694         memcpy(priv->ucode_data.v_addr, src, len);
1695         memcpy(priv->ucode_data_backup.v_addr, src, len);
1696         src += len;
1697
1698         /* Initialization instructions (3rd block) */
1699         if (init_size) {
1700                 len = init_size;
1701                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1702                                 len);
1703                 memcpy(priv->ucode_init.v_addr, src, len);
1704                 src += len;
1705         }
1706
1707         /* Initialization data (4th block) */
1708         if (init_data_size) {
1709                 len = init_data_size;
1710                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1711                                len);
1712                 memcpy(priv->ucode_init_data.v_addr, src, len);
1713                 src += len;
1714         }
1715
1716         /* Bootstrap instructions (5th block) */
1717         len = boot_size;
1718         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1719         memcpy(priv->ucode_boot.v_addr, src, len);
1720
1721         /**************************************************
1722          * This is still part of probe() in a sense...
1723          *
1724          * 9. Setup and register with mac80211 and debugfs
1725          **************************************************/
1726         err = iwl_mac_setup_register(priv);
1727         if (err)
1728                 goto out_unbind;
1729
1730         err = iwl_dbgfs_register(priv, DRV_NAME);
1731         if (err)
1732                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1733
1734         /* We have our copies now, allow OS release its copies */
1735         release_firmware(ucode_raw);
1736         return;
1737
1738  try_again:
1739         /* try next, if any */
1740         if (iwl_request_firmware(priv, false))
1741                 goto out_unbind;
1742         release_firmware(ucode_raw);
1743         return;
1744
1745  err_pci_alloc:
1746         IWL_ERR(priv, "failed to allocate pci memory\n");
1747         iwl_dealloc_ucode_pci(priv);
1748  out_unbind:
1749         device_release_driver(&priv->pci_dev->dev);
1750         release_firmware(ucode_raw);
1751 }
1752
1753 static const char *desc_lookup_text[] = {
1754         "OK",
1755         "FAIL",
1756         "BAD_PARAM",
1757         "BAD_CHECKSUM",
1758         "NMI_INTERRUPT_WDG",
1759         "SYSASSERT",
1760         "FATAL_ERROR",
1761         "BAD_COMMAND",
1762         "HW_ERROR_TUNE_LOCK",
1763         "HW_ERROR_TEMPERATURE",
1764         "ILLEGAL_CHAN_FREQ",
1765         "VCC_NOT_STABLE",
1766         "FH_ERROR",
1767         "NMI_INTERRUPT_HOST",
1768         "NMI_INTERRUPT_ACTION_PT",
1769         "NMI_INTERRUPT_UNKNOWN",
1770         "UCODE_VERSION_MISMATCH",
1771         "HW_ERROR_ABS_LOCK",
1772         "HW_ERROR_CAL_LOCK_FAIL",
1773         "NMI_INTERRUPT_INST_ACTION_PT",
1774         "NMI_INTERRUPT_DATA_ACTION_PT",
1775         "NMI_TRM_HW_ER",
1776         "NMI_INTERRUPT_TRM",
1777         "NMI_INTERRUPT_BREAK_POINT"
1778         "DEBUG_0",
1779         "DEBUG_1",
1780         "DEBUG_2",
1781         "DEBUG_3",
1782         "ADVANCED SYSASSERT"
1783 };
1784
1785 static const char *desc_lookup(int i)
1786 {
1787         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1788
1789         if (i < 0 || i > max)
1790                 i = max;
1791
1792         return desc_lookup_text[i];
1793 }
1794
1795 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1796 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1797
1798 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1799 {
1800         u32 data2, line;
1801         u32 desc, time, count, base, data1;
1802         u32 blink1, blink2, ilink1, ilink2;
1803
1804         if (priv->ucode_type == UCODE_INIT)
1805                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1806         else
1807                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1808
1809         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1810                 IWL_ERR(priv,
1811                         "Not valid error log pointer 0x%08X for %s uCode\n",
1812                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1813                 return;
1814         }
1815
1816         count = iwl_read_targ_mem(priv, base);
1817
1818         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1819                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1820                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1821                         priv->status, count);
1822         }
1823
1824         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1825         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1826         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1827         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1828         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1829         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1830         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1831         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1832         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1833
1834         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1835                                       blink1, blink2, ilink1, ilink2);
1836
1837         IWL_ERR(priv, "Desc                               Time       "
1838                 "data1      data2      line\n");
1839         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1840                 desc_lookup(desc), desc, time, data1, data2, line);
1841         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1842         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1843                 ilink1, ilink2);
1844
1845 }
1846
1847 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1848
1849 /**
1850  * iwl_print_event_log - Dump error event log to syslog
1851  *
1852  */
1853 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1854                                u32 num_events, u32 mode,
1855                                int pos, char **buf, size_t bufsz)
1856 {
1857         u32 i;
1858         u32 base;       /* SRAM byte address of event log header */
1859         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1860         u32 ptr;        /* SRAM byte address of log data */
1861         u32 ev, time, data; /* event log data */
1862         unsigned long reg_flags;
1863
1864         if (num_events == 0)
1865                 return pos;
1866         if (priv->ucode_type == UCODE_INIT)
1867                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1868         else
1869                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1870
1871         if (mode == 0)
1872                 event_size = 2 * sizeof(u32);
1873         else
1874                 event_size = 3 * sizeof(u32);
1875
1876         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1877
1878         /* Make sure device is powered up for SRAM reads */
1879         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1880         iwl_grab_nic_access(priv);
1881
1882         /* Set starting address; reads will auto-increment */
1883         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1884         rmb();
1885
1886         /* "time" is actually "data" for mode 0 (no timestamp).
1887         * place event id # at far right for easier visual parsing. */
1888         for (i = 0; i < num_events; i++) {
1889                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1890                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1891                 if (mode == 0) {
1892                         /* data, ev */
1893                         if (bufsz) {
1894                                 pos += scnprintf(*buf + pos, bufsz - pos,
1895                                                 "EVT_LOG:0x%08x:%04u\n",
1896                                                 time, ev);
1897                         } else {
1898                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1899                                         time, ev);
1900                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1901                                         time, ev);
1902                         }
1903                 } else {
1904                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1905                         if (bufsz) {
1906                                 pos += scnprintf(*buf + pos, bufsz - pos,
1907                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1908                                                  time, data, ev);
1909                         } else {
1910                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1911                                         time, data, ev);
1912                                 trace_iwlwifi_dev_ucode_event(priv, time,
1913                                         data, ev);
1914                         }
1915                 }
1916         }
1917
1918         /* Allow device to power down */
1919         iwl_release_nic_access(priv);
1920         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1921         return pos;
1922 }
1923
1924 /**
1925  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1926  */
1927 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1928                                     u32 num_wraps, u32 next_entry,
1929                                     u32 size, u32 mode,
1930                                     int pos, char **buf, size_t bufsz)
1931 {
1932         /*
1933          * display the newest DEFAULT_LOG_ENTRIES entries
1934          * i.e the entries just before the next ont that uCode would fill.
1935          */
1936         if (num_wraps) {
1937                 if (next_entry < size) {
1938                         pos = iwl_print_event_log(priv,
1939                                                 capacity - (size - next_entry),
1940                                                 size - next_entry, mode,
1941                                                 pos, buf, bufsz);
1942                         pos = iwl_print_event_log(priv, 0,
1943                                                   next_entry, mode,
1944                                                   pos, buf, bufsz);
1945                 } else
1946                         pos = iwl_print_event_log(priv, next_entry - size,
1947                                                   size, mode, pos, buf, bufsz);
1948         } else {
1949                 if (next_entry < size) {
1950                         pos = iwl_print_event_log(priv, 0, next_entry,
1951                                                   mode, pos, buf, bufsz);
1952                 } else {
1953                         pos = iwl_print_event_log(priv, next_entry - size,
1954                                                   size, mode, pos, buf, bufsz);
1955                 }
1956         }
1957         return pos;
1958 }
1959
1960 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1961 #define MAX_EVENT_LOG_SIZE (512)
1962
1963 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1964
1965 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1966                             char **buf, bool display)
1967 {
1968         u32 base;       /* SRAM byte address of event log header */
1969         u32 capacity;   /* event log capacity in # entries */
1970         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1971         u32 num_wraps;  /* # times uCode wrapped to top of log */
1972         u32 next_entry; /* index of next entry to be written by uCode */
1973         u32 size;       /* # entries that we'll print */
1974         int pos = 0;
1975         size_t bufsz = 0;
1976
1977         if (priv->ucode_type == UCODE_INIT)
1978                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1979         else
1980                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1981
1982         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1983                 IWL_ERR(priv,
1984                         "Invalid event log pointer 0x%08X for %s uCode\n",
1985                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1986                 return -EINVAL;
1987         }
1988
1989         /* event log header */
1990         capacity = iwl_read_targ_mem(priv, base);
1991         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1992         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1993         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1994
1995         if (capacity > MAX_EVENT_LOG_SIZE) {
1996                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1997                         capacity, MAX_EVENT_LOG_SIZE);
1998                 capacity = MAX_EVENT_LOG_SIZE;
1999         }
2000
2001         if (next_entry > MAX_EVENT_LOG_SIZE) {
2002                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2003                         next_entry, MAX_EVENT_LOG_SIZE);
2004                 next_entry = MAX_EVENT_LOG_SIZE;
2005         }
2006
2007         size = num_wraps ? capacity : next_entry;
2008
2009         /* bail out if nothing in log */
2010         if (size == 0) {
2011                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2012                 return pos;
2013         }
2014
2015 #ifdef CONFIG_IWLWIFI_DEBUG
2016         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2017                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2018                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2019 #else
2020         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2021                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2022 #endif
2023         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2024                 size);
2025
2026 #ifdef CONFIG_IWLWIFI_DEBUG
2027         if (display) {
2028                 if (full_log)
2029                         bufsz = capacity * 48;
2030                 else
2031                         bufsz = size * 48;
2032                 *buf = kmalloc(bufsz, GFP_KERNEL);
2033                 if (!*buf)
2034                         return -ENOMEM;
2035         }
2036         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2037                 /*
2038                  * if uCode has wrapped back to top of log,
2039                  * start at the oldest entry,
2040                  * i.e the next one that uCode would fill.
2041                  */
2042                 if (num_wraps)
2043                         pos = iwl_print_event_log(priv, next_entry,
2044                                                 capacity - next_entry, mode,
2045                                                 pos, buf, bufsz);
2046                 /* (then/else) start at top of log */
2047                 pos = iwl_print_event_log(priv, 0,
2048                                           next_entry, mode, pos, buf, bufsz);
2049         } else
2050                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2051                                                 next_entry, size, mode,
2052                                                 pos, buf, bufsz);
2053 #else
2054         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2055                                         next_entry, size, mode,
2056                                         pos, buf, bufsz);
2057 #endif
2058         return pos;
2059 }
2060
2061 /**
2062  * iwl_alive_start - called after REPLY_ALIVE notification received
2063  *                   from protocol/runtime uCode (initialization uCode's
2064  *                   Alive gets handled by iwl_init_alive_start()).
2065  */
2066 static void iwl_alive_start(struct iwl_priv *priv)
2067 {
2068         int ret = 0;
2069
2070         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2071
2072         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2073                 /* We had an error bringing up the hardware, so take it
2074                  * all the way back down so we can try again */
2075                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2076                 goto restart;
2077         }
2078
2079         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2080          * This is a paranoid check, because we would not have gotten the
2081          * "runtime" alive if code weren't properly loaded.  */
2082         if (iwl_verify_ucode(priv)) {
2083                 /* Runtime instruction load was bad;
2084                  * take it all the way back down so we can try again */
2085                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2086                 goto restart;
2087         }
2088
2089         iwl_clear_stations_table(priv);
2090         ret = priv->cfg->ops->lib->alive_notify(priv);
2091         if (ret) {
2092                 IWL_WARN(priv,
2093                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2094                 goto restart;
2095         }
2096
2097         /* After the ALIVE response, we can send host commands to the uCode */
2098         set_bit(STATUS_ALIVE, &priv->status);
2099
2100         if (iwl_is_rfkill(priv))
2101                 return;
2102
2103         ieee80211_wake_queues(priv->hw);
2104
2105         priv->active_rate = priv->rates_mask;
2106         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2107
2108         /* Configure Tx antenna selection based on H/W config */
2109         if (priv->cfg->ops->hcmd->set_tx_ant)
2110                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2111
2112         if (iwl_is_associated(priv)) {
2113                 struct iwl_rxon_cmd *active_rxon =
2114                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2115                 /* apply any changes in staging */
2116                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2117                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2118         } else {
2119                 /* Initialize our rx_config data */
2120                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2121
2122                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2123                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2124
2125                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2126         }
2127
2128         /* Configure Bluetooth device coexistence support */
2129         iwl_send_bt_config(priv);
2130
2131         iwl_reset_run_time_calib(priv);
2132
2133         /* Configure the adapter for unassociated operation */
2134         iwlcore_commit_rxon(priv);
2135
2136         /* At this point, the NIC is initialized and operational */
2137         iwl_rf_kill_ct_config(priv);
2138
2139         iwl_leds_init(priv);
2140
2141         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2142         set_bit(STATUS_READY, &priv->status);
2143         wake_up_interruptible(&priv->wait_command_queue);
2144
2145         iwl_power_update_mode(priv, true);
2146
2147         /* reassociate for ADHOC mode */
2148         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2149                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2150                                                                 priv->vif);
2151                 if (beacon)
2152                         iwl_mac_beacon_update(priv->hw, beacon);
2153         }
2154
2155
2156         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2157                 iwl_set_mode(priv, priv->iw_mode);
2158
2159         return;
2160
2161  restart:
2162         queue_work(priv->workqueue, &priv->restart);
2163 }
2164
2165 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2166
2167 static void __iwl_down(struct iwl_priv *priv)
2168 {
2169         unsigned long flags;
2170         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2171
2172         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2173
2174         if (!exit_pending)
2175                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2176
2177         iwl_clear_stations_table(priv);
2178
2179         /* Unblock any waiting calls */
2180         wake_up_interruptible_all(&priv->wait_command_queue);
2181
2182         /* Wipe out the EXIT_PENDING status bit if we are not actually
2183          * exiting the module */
2184         if (!exit_pending)
2185                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2186
2187         /* stop and reset the on-board processor */
2188         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2189
2190         /* tell the device to stop sending interrupts */
2191         spin_lock_irqsave(&priv->lock, flags);
2192         iwl_disable_interrupts(priv);
2193         spin_unlock_irqrestore(&priv->lock, flags);
2194         iwl_synchronize_irq(priv);
2195
2196         if (priv->mac80211_registered)
2197                 ieee80211_stop_queues(priv->hw);
2198
2199         /* If we have not previously called iwl_init() then
2200          * clear all bits but the RF Kill bit and return */
2201         if (!iwl_is_init(priv)) {
2202                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2203                                         STATUS_RF_KILL_HW |
2204                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2205                                         STATUS_GEO_CONFIGURED |
2206                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2207                                         STATUS_EXIT_PENDING;
2208                 goto exit;
2209         }
2210
2211         /* ...otherwise clear out all the status bits but the RF Kill
2212          * bit and continue taking the NIC down. */
2213         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2214                                 STATUS_RF_KILL_HW |
2215                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2216                                 STATUS_GEO_CONFIGURED |
2217                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2218                                 STATUS_FW_ERROR |
2219                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2220                                 STATUS_EXIT_PENDING;
2221
2222         /* device going down, Stop using ICT table */
2223         iwl_disable_ict(priv);
2224
2225         iwl_txq_ctx_stop(priv);
2226         iwl_rxq_stop(priv);
2227
2228         /* Power-down device's busmaster DMA clocks */
2229         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2230         udelay(5);
2231
2232         /* Make sure (redundant) we've released our request to stay awake */
2233         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2234
2235         /* Stop the device, and put it in low power state */
2236         priv->cfg->ops->lib->apm_ops.stop(priv);
2237
2238  exit:
2239         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2240
2241         if (priv->ibss_beacon)
2242                 dev_kfree_skb(priv->ibss_beacon);
2243         priv->ibss_beacon = NULL;
2244
2245         /* clear out any free frames */
2246         iwl_clear_free_frames(priv);
2247 }
2248
2249 static void iwl_down(struct iwl_priv *priv)
2250 {
2251         mutex_lock(&priv->mutex);
2252         __iwl_down(priv);
2253         mutex_unlock(&priv->mutex);
2254
2255         iwl_cancel_deferred_work(priv);
2256 }
2257
2258 #define HW_READY_TIMEOUT (50)
2259
2260 static int iwl_set_hw_ready(struct iwl_priv *priv)
2261 {
2262         int ret = 0;
2263
2264         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2265                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2266
2267         /* See if we got it */
2268         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2269                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2270                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2271                                 HW_READY_TIMEOUT);
2272         if (ret != -ETIMEDOUT)
2273                 priv->hw_ready = true;
2274         else
2275                 priv->hw_ready = false;
2276
2277         IWL_DEBUG_INFO(priv, "hardware %s\n",
2278                       (priv->hw_ready == 1) ? "ready" : "not ready");
2279         return ret;
2280 }
2281
2282 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2283 {
2284         int ret = 0;
2285
2286         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2287
2288         ret = iwl_set_hw_ready(priv);
2289         if (priv->hw_ready)
2290                 return ret;
2291
2292         /* If HW is not ready, prepare the conditions to check again */
2293         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2294                         CSR_HW_IF_CONFIG_REG_PREPARE);
2295
2296         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2297                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2298                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2299
2300         /* HW should be ready by now, check again. */
2301         if (ret != -ETIMEDOUT)
2302                 iwl_set_hw_ready(priv);
2303
2304         return ret;
2305 }
2306
2307 #define MAX_HW_RESTARTS 5
2308
2309 static int __iwl_up(struct iwl_priv *priv)
2310 {
2311         int i;
2312         int ret;
2313
2314         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2315                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2316                 return -EIO;
2317         }
2318
2319         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2320                 IWL_ERR(priv, "ucode not available for device bringup\n");
2321                 return -EIO;
2322         }
2323
2324         iwl_prepare_card_hw(priv);
2325
2326         if (!priv->hw_ready) {
2327                 IWL_WARN(priv, "Exit HW not ready\n");
2328                 return -EIO;
2329         }
2330
2331         /* If platform's RF_KILL switch is NOT set to KILL */
2332         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2333                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2334         else
2335                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2336
2337         if (iwl_is_rfkill(priv)) {
2338                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2339
2340                 iwl_enable_interrupts(priv);
2341                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2342                 return 0;
2343         }
2344
2345         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2346
2347         ret = iwl_hw_nic_init(priv);
2348         if (ret) {
2349                 IWL_ERR(priv, "Unable to init nic\n");
2350                 return ret;
2351         }
2352
2353         /* make sure rfkill handshake bits are cleared */
2354         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2355         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2356                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2357
2358         /* clear (again), then enable host interrupts */
2359         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2360         iwl_enable_interrupts(priv);
2361
2362         /* really make sure rfkill handshake bits are cleared */
2363         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2364         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2365
2366         /* Copy original ucode data image from disk into backup cache.
2367          * This will be used to initialize the on-board processor's
2368          * data SRAM for a clean start when the runtime program first loads. */
2369         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2370                priv->ucode_data.len);
2371
2372         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2373
2374                 iwl_clear_stations_table(priv);
2375
2376                 /* load bootstrap state machine,
2377                  * load bootstrap program into processor's memory,
2378                  * prepare to load the "initialize" uCode */
2379                 ret = priv->cfg->ops->lib->load_ucode(priv);
2380
2381                 if (ret) {
2382                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2383                                 ret);
2384                         continue;
2385                 }
2386
2387                 /* start card; "initialize" will load runtime ucode */
2388                 iwl_nic_start(priv);
2389
2390                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2391
2392                 return 0;
2393         }
2394
2395         set_bit(STATUS_EXIT_PENDING, &priv->status);
2396         __iwl_down(priv);
2397         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2398
2399         /* tried to restart and config the device for as long as our
2400          * patience could withstand */
2401         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2402         return -EIO;
2403 }
2404
2405
2406 /*****************************************************************************
2407  *
2408  * Workqueue callbacks
2409  *
2410  *****************************************************************************/
2411
2412 static void iwl_bg_init_alive_start(struct work_struct *data)
2413 {
2414         struct iwl_priv *priv =
2415             container_of(data, struct iwl_priv, init_alive_start.work);
2416
2417         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2418                 return;
2419
2420         mutex_lock(&priv->mutex);
2421         priv->cfg->ops->lib->init_alive_start(priv);
2422         mutex_unlock(&priv->mutex);
2423 }
2424
2425 static void iwl_bg_alive_start(struct work_struct *data)
2426 {
2427         struct iwl_priv *priv =
2428             container_of(data, struct iwl_priv, alive_start.work);
2429
2430         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2431                 return;
2432
2433         /* enable dram interrupt */
2434         iwl_reset_ict(priv);
2435
2436         mutex_lock(&priv->mutex);
2437         iwl_alive_start(priv);
2438         mutex_unlock(&priv->mutex);
2439 }
2440
2441 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2442 {
2443         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2444                         run_time_calib_work);
2445
2446         mutex_lock(&priv->mutex);
2447
2448         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2449             test_bit(STATUS_SCANNING, &priv->status)) {
2450                 mutex_unlock(&priv->mutex);
2451                 return;
2452         }
2453
2454         if (priv->start_calib) {
2455                 iwl_chain_noise_calibration(priv, &priv->statistics);
2456
2457                 iwl_sensitivity_calibration(priv, &priv->statistics);
2458         }
2459
2460         mutex_unlock(&priv->mutex);
2461         return;
2462 }
2463
2464 static void iwl_bg_restart(struct work_struct *data)
2465 {
2466         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2467
2468         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2469                 return;
2470
2471         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2472                 mutex_lock(&priv->mutex);
2473                 priv->vif = NULL;
2474                 priv->is_open = 0;
2475                 mutex_unlock(&priv->mutex);
2476                 iwl_down(priv);
2477                 ieee80211_restart_hw(priv->hw);
2478         } else {
2479                 iwl_down(priv);
2480
2481                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2482                         return;
2483
2484                 mutex_lock(&priv->mutex);
2485                 __iwl_up(priv);
2486                 mutex_unlock(&priv->mutex);
2487         }
2488 }
2489
2490 static void iwl_bg_rx_replenish(struct work_struct *data)
2491 {
2492         struct iwl_priv *priv =
2493             container_of(data, struct iwl_priv, rx_replenish);
2494
2495         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2496                 return;
2497
2498         mutex_lock(&priv->mutex);
2499         iwl_rx_replenish(priv);
2500         mutex_unlock(&priv->mutex);
2501 }
2502
2503 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2504
2505 void iwl_post_associate(struct iwl_priv *priv)
2506 {
2507         struct ieee80211_conf *conf = NULL;
2508         int ret = 0;
2509         unsigned long flags;
2510
2511         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2512                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2513                 return;
2514         }
2515
2516         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2517                         priv->assoc_id, priv->active_rxon.bssid_addr);
2518
2519
2520         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2521                 return;
2522
2523
2524         if (!priv->vif || !priv->is_open)
2525                 return;
2526
2527         iwl_scan_cancel_timeout(priv, 200);
2528
2529         conf = ieee80211_get_hw_conf(priv->hw);
2530
2531         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2532         iwlcore_commit_rxon(priv);
2533
2534         iwl_setup_rxon_timing(priv);
2535         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2536                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2537         if (ret)
2538                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2539                             "Attempting to continue.\n");
2540
2541         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2542
2543         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2544
2545         if (priv->cfg->ops->hcmd->set_rxon_chain)
2546                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2547
2548         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2549
2550         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2551                         priv->assoc_id, priv->beacon_int);
2552
2553         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2554                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2555         else
2556                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2557
2558         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2559                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2560                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2561                 else
2562                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2563
2564                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2565                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2566
2567         }
2568
2569         iwlcore_commit_rxon(priv);
2570
2571         switch (priv->iw_mode) {
2572         case NL80211_IFTYPE_STATION:
2573                 break;
2574
2575         case NL80211_IFTYPE_ADHOC:
2576
2577                 /* assume default assoc id */
2578                 priv->assoc_id = 1;
2579
2580                 iwl_rxon_add_station(priv, priv->bssid, 0);
2581                 iwl_send_beacon_cmd(priv);
2582
2583                 break;
2584
2585         default:
2586                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2587                           __func__, priv->iw_mode);
2588                 break;
2589         }
2590
2591         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2592                 priv->assoc_station_added = 1;
2593
2594         spin_lock_irqsave(&priv->lock, flags);
2595         iwl_activate_qos(priv, 0);
2596         spin_unlock_irqrestore(&priv->lock, flags);
2597
2598         /* the chain noise calibration will enabled PM upon completion
2599          * If chain noise has already been run, then we need to enable
2600          * power management here */
2601         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2602                 iwl_power_update_mode(priv, false);
2603
2604         /* Enable Rx differential gain and sensitivity calibrations */
2605         iwl_chain_noise_reset(priv);
2606         priv->start_calib = 1;
2607
2608 }
2609
2610 /*****************************************************************************
2611  *
2612  * mac80211 entry point functions
2613  *
2614  *****************************************************************************/
2615
2616 #define UCODE_READY_TIMEOUT     (4 * HZ)
2617
2618 /*
2619  * Not a mac80211 entry point function, but it fits in with all the
2620  * other mac80211 functions grouped here.
2621  */
2622 static int iwl_mac_setup_register(struct iwl_priv *priv)
2623 {
2624         int ret;
2625         struct ieee80211_hw *hw = priv->hw;
2626         hw->rate_control_algorithm = "iwl-agn-rs";
2627
2628         /* Tell mac80211 our characteristics */
2629         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2630                     IEEE80211_HW_NOISE_DBM |
2631                     IEEE80211_HW_AMPDU_AGGREGATION |
2632                     IEEE80211_HW_SPECTRUM_MGMT;
2633
2634         if (!priv->cfg->broken_powersave)
2635                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2636                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2637
2638         if (priv->cfg->sku & IWL_SKU_N)
2639                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2640                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2641
2642         hw->sta_data_size = sizeof(struct iwl_station_priv);
2643         hw->wiphy->interface_modes =
2644                 BIT(NL80211_IFTYPE_STATION) |
2645                 BIT(NL80211_IFTYPE_ADHOC);
2646
2647         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2648                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2649
2650         /*
2651          * For now, disable PS by default because it affects
2652          * RX performance significantly.
2653          */
2654         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2655
2656         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2657         /* we create the 802.11 header and a zero-length SSID element */
2658         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2659
2660         /* Default value; 4 EDCA QOS priorities */
2661         hw->queues = 4;
2662
2663         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2664
2665         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2666                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2667                         &priv->bands[IEEE80211_BAND_2GHZ];
2668         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2669                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2670                         &priv->bands[IEEE80211_BAND_5GHZ];
2671
2672         ret = ieee80211_register_hw(priv->hw);
2673         if (ret) {
2674                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2675                 return ret;
2676         }
2677         priv->mac80211_registered = 1;
2678
2679         return 0;
2680 }
2681
2682
2683 static int iwl_mac_start(struct ieee80211_hw *hw)
2684 {
2685         struct iwl_priv *priv = hw->priv;
2686         int ret;
2687
2688         IWL_DEBUG_MAC80211(priv, "enter\n");
2689
2690         /* we should be verifying the device is ready to be opened */
2691         mutex_lock(&priv->mutex);
2692         ret = __iwl_up(priv);
2693         mutex_unlock(&priv->mutex);
2694
2695         if (ret)
2696                 return ret;
2697
2698         if (iwl_is_rfkill(priv))
2699                 goto out;
2700
2701         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2702
2703         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2704          * mac80211 will not be run successfully. */
2705         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2706                         test_bit(STATUS_READY, &priv->status),
2707                         UCODE_READY_TIMEOUT);
2708         if (!ret) {
2709                 if (!test_bit(STATUS_READY, &priv->status)) {
2710                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2711                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2712                         return -ETIMEDOUT;
2713                 }
2714         }
2715
2716         iwl_led_start(priv);
2717
2718 out:
2719         priv->is_open = 1;
2720         IWL_DEBUG_MAC80211(priv, "leave\n");
2721         return 0;
2722 }
2723
2724 static void iwl_mac_stop(struct ieee80211_hw *hw)
2725 {
2726         struct iwl_priv *priv = hw->priv;
2727
2728         IWL_DEBUG_MAC80211(priv, "enter\n");
2729
2730         if (!priv->is_open)
2731                 return;
2732
2733         priv->is_open = 0;
2734
2735         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2736                 /* stop mac, cancel any scan request and clear
2737                  * RXON_FILTER_ASSOC_MSK BIT
2738                  */
2739                 mutex_lock(&priv->mutex);
2740                 iwl_scan_cancel_timeout(priv, 100);
2741                 mutex_unlock(&priv->mutex);
2742         }
2743
2744         iwl_down(priv);
2745
2746         flush_workqueue(priv->workqueue);
2747
2748         /* enable interrupts again in order to receive rfkill changes */
2749         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2750         iwl_enable_interrupts(priv);
2751
2752         IWL_DEBUG_MAC80211(priv, "leave\n");
2753 }
2754
2755 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2756 {
2757         struct iwl_priv *priv = hw->priv;
2758
2759         IWL_DEBUG_MACDUMP(priv, "enter\n");
2760
2761         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2762                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2763
2764         if (iwl_tx_skb(priv, skb))
2765                 dev_kfree_skb_any(skb);
2766
2767         IWL_DEBUG_MACDUMP(priv, "leave\n");
2768         return NETDEV_TX_OK;
2769 }
2770
2771 void iwl_config_ap(struct iwl_priv *priv)
2772 {
2773         int ret = 0;
2774         unsigned long flags;
2775
2776         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2777                 return;
2778
2779         /* The following should be done only at AP bring up */
2780         if (!iwl_is_associated(priv)) {
2781
2782                 /* RXON - unassoc (to set timing command) */
2783                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2784                 iwlcore_commit_rxon(priv);
2785
2786                 /* RXON Timing */
2787                 iwl_setup_rxon_timing(priv);
2788                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2789                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2790                 if (ret)
2791                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2792                                         "Attempting to continue.\n");
2793
2794                 /* AP has all antennas */
2795                 priv->chain_noise_data.active_chains =
2796                         priv->hw_params.valid_rx_ant;
2797                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2798                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2799                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2800
2801                 /* FIXME: what should be the assoc_id for AP? */
2802                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2803                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2804                         priv->staging_rxon.flags |=
2805                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2806                 else
2807                         priv->staging_rxon.flags &=
2808                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2809
2810                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2811                         if (priv->assoc_capability &
2812                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2813                                 priv->staging_rxon.flags |=
2814                                         RXON_FLG_SHORT_SLOT_MSK;
2815                         else
2816                                 priv->staging_rxon.flags &=
2817                                         ~RXON_FLG_SHORT_SLOT_MSK;
2818
2819                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2820                                 priv->staging_rxon.flags &=
2821                                         ~RXON_FLG_SHORT_SLOT_MSK;
2822                 }
2823                 /* restore RXON assoc */
2824                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2825                 iwlcore_commit_rxon(priv);
2826                 iwl_reset_qos(priv);
2827                 spin_lock_irqsave(&priv->lock, flags);
2828                 iwl_activate_qos(priv, 1);
2829                 spin_unlock_irqrestore(&priv->lock, flags);
2830                 iwl_add_bcast_station(priv);
2831         }
2832         iwl_send_beacon_cmd(priv);
2833
2834         /* FIXME - we need to add code here to detect a totally new
2835          * configuration, reset the AP, unassoc, rxon timing, assoc,
2836          * clear sta table, add BCAST sta... */
2837 }
2838
2839 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2840                                     struct ieee80211_vif *vif,
2841                                     struct ieee80211_key_conf *keyconf,
2842                                     struct ieee80211_sta *sta,
2843                                     u32 iv32, u16 *phase1key)
2844 {
2845
2846         struct iwl_priv *priv = hw->priv;
2847         IWL_DEBUG_MAC80211(priv, "enter\n");
2848
2849         iwl_update_tkip_key(priv, keyconf,
2850                             sta ? sta->addr : iwl_bcast_addr,
2851                             iv32, phase1key);
2852
2853         IWL_DEBUG_MAC80211(priv, "leave\n");
2854 }
2855
2856 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2857                            struct ieee80211_vif *vif,
2858                            struct ieee80211_sta *sta,
2859                            struct ieee80211_key_conf *key)
2860 {
2861         struct iwl_priv *priv = hw->priv;
2862         const u8 *addr;
2863         int ret;
2864         u8 sta_id;
2865         bool is_default_wep_key = false;
2866
2867         IWL_DEBUG_MAC80211(priv, "enter\n");
2868
2869         if (priv->cfg->mod_params->sw_crypto) {
2870                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2871                 return -EOPNOTSUPP;
2872         }
2873         addr = sta ? sta->addr : iwl_bcast_addr;
2874         sta_id = iwl_find_station(priv, addr);
2875         if (sta_id == IWL_INVALID_STATION) {
2876                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2877                                    addr);
2878                 return -EINVAL;
2879
2880         }
2881
2882         mutex_lock(&priv->mutex);
2883         iwl_scan_cancel_timeout(priv, 100);
2884         mutex_unlock(&priv->mutex);
2885
2886         /* If we are getting WEP group key and we didn't receive any key mapping
2887          * so far, we are in legacy wep mode (group key only), otherwise we are
2888          * in 1X mode.
2889          * In legacy wep mode, we use another host command to the uCode */
2890         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2891                 priv->iw_mode != NL80211_IFTYPE_AP) {
2892                 if (cmd == SET_KEY)
2893                         is_default_wep_key = !priv->key_mapping_key;
2894                 else
2895                         is_default_wep_key =
2896                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2897         }
2898
2899         switch (cmd) {
2900         case SET_KEY:
2901                 if (is_default_wep_key)
2902                         ret = iwl_set_default_wep_key(priv, key);
2903                 else
2904                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2905
2906                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2907                 break;
2908         case DISABLE_KEY:
2909                 if (is_default_wep_key)
2910                         ret = iwl_remove_default_wep_key(priv, key);
2911                 else
2912                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2913
2914                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2915                 break;
2916         default:
2917                 ret = -EINVAL;
2918         }
2919
2920         IWL_DEBUG_MAC80211(priv, "leave\n");
2921
2922         return ret;
2923 }
2924
2925 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2926                                 struct ieee80211_vif *vif,
2927                              enum ieee80211_ampdu_mlme_action action,
2928                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2929 {
2930         struct iwl_priv *priv = hw->priv;
2931         int ret;
2932
2933         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2934                      sta->addr, tid);
2935
2936         if (!(priv->cfg->sku & IWL_SKU_N))
2937                 return -EACCES;
2938
2939         switch (action) {
2940         case IEEE80211_AMPDU_RX_START:
2941                 IWL_DEBUG_HT(priv, "start Rx\n");
2942                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2943         case IEEE80211_AMPDU_RX_STOP:
2944                 IWL_DEBUG_HT(priv, "stop Rx\n");
2945                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2946                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2947                         return 0;
2948                 else
2949                         return ret;
2950         case IEEE80211_AMPDU_TX_START:
2951                 IWL_DEBUG_HT(priv, "start Tx\n");
2952                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2953         case IEEE80211_AMPDU_TX_STOP:
2954                 IWL_DEBUG_HT(priv, "stop Tx\n");
2955                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2956                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2957                         return 0;
2958                 else
2959                         return ret;
2960         case IEEE80211_AMPDU_TX_OPERATIONAL:
2961                 /* do nothing */
2962                 return -EOPNOTSUPP;
2963         default:
2964                 IWL_DEBUG_HT(priv, "unknown\n");
2965                 return -EINVAL;
2966                 break;
2967         }
2968         return 0;
2969 }
2970
2971 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2972                              struct ieee80211_low_level_stats *stats)
2973 {
2974         struct iwl_priv *priv = hw->priv;
2975
2976         priv = hw->priv;
2977         IWL_DEBUG_MAC80211(priv, "enter\n");
2978         IWL_DEBUG_MAC80211(priv, "leave\n");
2979
2980         return 0;
2981 }
2982
2983 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2984                                struct ieee80211_vif *vif,
2985                                enum sta_notify_cmd cmd,
2986                                struct ieee80211_sta *sta)
2987 {
2988         struct iwl_priv *priv = hw->priv;
2989         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2990         int sta_id;
2991
2992         /*
2993          * TODO: We really should use this callback to
2994          *       actually maintain the station table in
2995          *       the device.
2996          */
2997
2998         switch (cmd) {
2999         case STA_NOTIFY_ADD:
3000                 atomic_set(&sta_priv->pending_frames, 0);
3001                 if (vif->type == NL80211_IFTYPE_AP)
3002                         sta_priv->client = true;
3003                 break;
3004         case STA_NOTIFY_SLEEP:
3005                 WARN_ON(!sta_priv->client);
3006                 sta_priv->asleep = true;
3007                 if (atomic_read(&sta_priv->pending_frames) > 0)
3008                         ieee80211_sta_block_awake(hw, sta, true);
3009                 break;
3010         case STA_NOTIFY_AWAKE:
3011                 WARN_ON(!sta_priv->client);
3012                 if (!sta_priv->asleep)
3013                         break;
3014                 sta_priv->asleep = false;
3015                 sta_id = iwl_find_station(priv, sta->addr);
3016                 if (sta_id != IWL_INVALID_STATION)
3017                         iwl_sta_modify_ps_wake(priv, sta_id);
3018                 break;
3019         default:
3020                 break;
3021         }
3022 }
3023
3024 /*****************************************************************************
3025  *
3026  * sysfs attributes
3027  *
3028  *****************************************************************************/
3029
3030 #ifdef CONFIG_IWLWIFI_DEBUG
3031
3032 /*
3033  * The following adds a new attribute to the sysfs representation
3034  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3035  * used for controlling the debug level.
3036  *
3037  * See the level definitions in iwl for details.
3038  *
3039  * The debug_level being managed using sysfs below is a per device debug
3040  * level that is used instead of the global debug level if it (the per
3041  * device debug level) is set.
3042  */
3043 static ssize_t show_debug_level(struct device *d,
3044                                 struct device_attribute *attr, char *buf)
3045 {
3046         struct iwl_priv *priv = dev_get_drvdata(d);
3047         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3048 }
3049 static ssize_t store_debug_level(struct device *d,
3050                                 struct device_attribute *attr,
3051                                  const char *buf, size_t count)
3052 {
3053         struct iwl_priv *priv = dev_get_drvdata(d);
3054         unsigned long val;
3055         int ret;
3056
3057         ret = strict_strtoul(buf, 0, &val);
3058         if (ret)
3059                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3060         else {
3061                 priv->debug_level = val;
3062                 if (iwl_alloc_traffic_mem(priv))
3063                         IWL_ERR(priv,
3064                                 "Not enough memory to generate traffic log\n");
3065         }
3066         return strnlen(buf, count);
3067 }
3068
3069 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3070                         show_debug_level, store_debug_level);
3071
3072
3073 #endif /* CONFIG_IWLWIFI_DEBUG */
3074
3075
3076 static ssize_t show_temperature(struct device *d,
3077                                 struct device_attribute *attr, char *buf)
3078 {
3079         struct iwl_priv *priv = dev_get_drvdata(d);
3080
3081         if (!iwl_is_alive(priv))
3082                 return -EAGAIN;
3083
3084         return sprintf(buf, "%d\n", priv->temperature);
3085 }
3086
3087 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3088
3089 static ssize_t show_tx_power(struct device *d,
3090                              struct device_attribute *attr, char *buf)
3091 {
3092         struct iwl_priv *priv = dev_get_drvdata(d);
3093
3094         if (!iwl_is_ready_rf(priv))
3095                 return sprintf(buf, "off\n");
3096         else
3097                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3098 }
3099
3100 static ssize_t store_tx_power(struct device *d,
3101                               struct device_attribute *attr,
3102                               const char *buf, size_t count)
3103 {
3104         struct iwl_priv *priv = dev_get_drvdata(d);
3105         unsigned long val;
3106         int ret;
3107
3108         ret = strict_strtoul(buf, 10, &val);
3109         if (ret)
3110                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3111         else {
3112                 ret = iwl_set_tx_power(priv, val, false);
3113                 if (ret)
3114                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
3115                                 ret);
3116                 else
3117                         ret = count;
3118         }
3119         return ret;
3120 }
3121
3122 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3123
3124 static ssize_t show_flags(struct device *d,
3125                           struct device_attribute *attr, char *buf)
3126 {
3127         struct iwl_priv *priv = dev_get_drvdata(d);
3128
3129         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3130 }
3131
3132 static ssize_t store_flags(struct device *d,
3133                            struct device_attribute *attr,
3134                            const char *buf, size_t count)
3135 {
3136         struct iwl_priv *priv = dev_get_drvdata(d);
3137         unsigned long val;
3138         u32 flags;
3139         int ret = strict_strtoul(buf, 0, &val);
3140         if (ret)
3141                 return ret;
3142         flags = (u32)val;
3143
3144         mutex_lock(&priv->mutex);
3145         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3146                 /* Cancel any currently running scans... */
3147                 if (iwl_scan_cancel_timeout(priv, 100))
3148                         IWL_WARN(priv, "Could not cancel scan.\n");
3149                 else {
3150                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3151                         priv->staging_rxon.flags = cpu_to_le32(flags);
3152                         iwlcore_commit_rxon(priv);
3153                 }
3154         }
3155         mutex_unlock(&priv->mutex);
3156
3157         return count;
3158 }
3159
3160 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3161
3162 static ssize_t show_filter_flags(struct device *d,
3163                                  struct device_attribute *attr, char *buf)
3164 {
3165         struct iwl_priv *priv = dev_get_drvdata(d);
3166
3167         return sprintf(buf, "0x%04X\n",
3168                 le32_to_cpu(priv->active_rxon.filter_flags));
3169 }
3170
3171 static ssize_t store_filter_flags(struct device *d,
3172                                   struct device_attribute *attr,
3173                                   const char *buf, size_t count)
3174 {
3175         struct iwl_priv *priv = dev_get_drvdata(d);
3176         unsigned long val;
3177         u32 filter_flags;
3178         int ret = strict_strtoul(buf, 0, &val);
3179         if (ret)
3180                 return ret;
3181         filter_flags = (u32)val;
3182
3183         mutex_lock(&priv->mutex);
3184         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3185                 /* Cancel any currently running scans... */
3186                 if (iwl_scan_cancel_timeout(priv, 100))
3187                         IWL_WARN(priv, "Could not cancel scan.\n");
3188                 else {
3189                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3190                                        "0x%04X\n", filter_flags);
3191                         priv->staging_rxon.filter_flags =
3192                                 cpu_to_le32(filter_flags);
3193                         iwlcore_commit_rxon(priv);
3194                 }
3195         }
3196         mutex_unlock(&priv->mutex);
3197
3198         return count;
3199 }
3200
3201 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3202                    store_filter_flags);
3203
3204
3205 static ssize_t show_statistics(struct device *d,
3206                                struct device_attribute *attr, char *buf)
3207 {
3208         struct iwl_priv *priv = dev_get_drvdata(d);
3209         u32 size = sizeof(struct iwl_notif_statistics);
3210         u32 len = 0, ofs = 0;
3211         u8 *data = (u8 *)&priv->statistics;
3212         int rc = 0;
3213
3214         if (!iwl_is_alive(priv))
3215                 return -EAGAIN;
3216
3217         mutex_lock(&priv->mutex);
3218         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3219         mutex_unlock(&priv->mutex);
3220
3221         if (rc) {
3222                 len = sprintf(buf,
3223                               "Error sending statistics request: 0x%08X\n", rc);
3224                 return len;
3225         }
3226
3227         while (size && (PAGE_SIZE - len)) {
3228                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3229                                    PAGE_SIZE - len, 1);
3230                 len = strlen(buf);
3231                 if (PAGE_SIZE - len)
3232                         buf[len++] = '\n';
3233
3234                 ofs += 16;
3235                 size -= min(size, 16U);
3236         }
3237
3238         return len;
3239 }
3240
3241 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3242
3243 static ssize_t show_rts_ht_protection(struct device *d,
3244                              struct device_attribute *attr, char *buf)
3245 {
3246         struct iwl_priv *priv = dev_get_drvdata(d);
3247
3248         return sprintf(buf, "%s\n",
3249                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3250 }
3251
3252 static ssize_t store_rts_ht_protection(struct device *d,
3253                               struct device_attribute *attr,
3254                               const char *buf, size_t count)
3255 {
3256         struct iwl_priv *priv = dev_get_drvdata(d);
3257         unsigned long val;
3258         int ret;
3259
3260         ret = strict_strtoul(buf, 10, &val);
3261         if (ret)
3262                 IWL_INFO(priv, "Input is not in decimal form.\n");
3263         else {
3264                 if (!iwl_is_associated(priv))
3265                         priv->cfg->use_rts_for_ht = val ? true : false;
3266                 else
3267                         IWL_ERR(priv, "Sta associated with AP - "
3268                                 "Change protection mechanism is not allowed\n");
3269                 ret = count;
3270         }
3271         return ret;
3272 }
3273
3274 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3275                         show_rts_ht_protection, store_rts_ht_protection);
3276
3277
3278 /*****************************************************************************
3279  *
3280  * driver setup and teardown
3281  *
3282  *****************************************************************************/
3283
3284 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3285 {
3286         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3287
3288         init_waitqueue_head(&priv->wait_command_queue);
3289
3290         INIT_WORK(&priv->restart, iwl_bg_restart);
3291         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3292         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3293         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3294         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3295         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3296
3297         iwl_setup_scan_deferred_work(priv);
3298
3299         if (priv->cfg->ops->lib->setup_deferred_work)
3300                 priv->cfg->ops->lib->setup_deferred_work(priv);
3301
3302         init_timer(&priv->statistics_periodic);
3303         priv->statistics_periodic.data = (unsigned long)priv;
3304         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3305
3306         init_timer(&priv->ucode_trace);
3307         priv->ucode_trace.data = (unsigned long)priv;
3308         priv->ucode_trace.function = iwl_bg_ucode_trace;
3309
3310         if (!priv->cfg->use_isr_legacy)
3311                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3312                         iwl_irq_tasklet, (unsigned long)priv);
3313         else
3314                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3315                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3316 }
3317
3318 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3319 {
3320         if (priv->cfg->ops->lib->cancel_deferred_work)
3321                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3322
3323         cancel_delayed_work_sync(&priv->init_alive_start);
3324         cancel_delayed_work(&priv->scan_check);
3325         cancel_delayed_work(&priv->alive_start);
3326         cancel_work_sync(&priv->beacon_update);
3327         del_timer_sync(&priv->statistics_periodic);
3328         del_timer_sync(&priv->ucode_trace);
3329 }
3330
3331 static void iwl_init_hw_rates(struct iwl_priv *priv,
3332                               struct ieee80211_rate *rates)
3333 {
3334         int i;
3335
3336         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3337                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3338                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3339                 rates[i].hw_value_short = i;
3340                 rates[i].flags = 0;
3341                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3342                         /*
3343                          * If CCK != 1M then set short preamble rate flag.
3344                          */
3345                         rates[i].flags |=
3346                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3347                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3348                 }
3349         }
3350 }
3351
3352 static int iwl_init_drv(struct iwl_priv *priv)
3353 {
3354         int ret;
3355
3356         priv->ibss_beacon = NULL;
3357
3358         spin_lock_init(&priv->sta_lock);
3359         spin_lock_init(&priv->hcmd_lock);
3360
3361         INIT_LIST_HEAD(&priv->free_frames);
3362
3363         mutex_init(&priv->mutex);
3364         mutex_init(&priv->sync_cmd_mutex);
3365
3366         /* Clear the driver's (not device's) station table */
3367         iwl_clear_stations_table(priv);
3368
3369         priv->ieee_channels = NULL;
3370         priv->ieee_rates = NULL;
3371         priv->band = IEEE80211_BAND_2GHZ;
3372
3373         priv->iw_mode = NL80211_IFTYPE_STATION;
3374         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3375         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3376
3377         /* initialize force reset */
3378         priv->force_reset[IWL_RF_RESET].reset_duration =
3379                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3380         priv->force_reset[IWL_FW_RESET].reset_duration =
3381                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3382
3383         /* Choose which receivers/antennas to use */
3384         if (priv->cfg->ops->hcmd->set_rxon_chain)
3385                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3386
3387         iwl_init_scan_params(priv);
3388
3389         iwl_reset_qos(priv);
3390
3391         priv->qos_data.qos_active = 0;
3392         priv->qos_data.qos_cap.val = 0;
3393
3394         priv->rates_mask = IWL_RATES_MASK;
3395         /* Set the tx_power_user_lmt to the lowest power level
3396          * this value will get overwritten by channel max power avg
3397          * from eeprom */
3398         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3399
3400         ret = iwl_init_channel_map(priv);
3401         if (ret) {
3402                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3403                 goto err;
3404         }
3405
3406         ret = iwlcore_init_geos(priv);
3407         if (ret) {
3408                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3409                 goto err_free_channel_map;
3410         }
3411         iwl_init_hw_rates(priv, priv->ieee_rates);
3412
3413         return 0;
3414
3415 err_free_channel_map:
3416         iwl_free_channel_map(priv);
3417 err:
3418         return ret;
3419 }
3420
3421 static void iwl_uninit_drv(struct iwl_priv *priv)
3422 {
3423         iwl_calib_free_results(priv);
3424         iwlcore_free_geos(priv);
3425         iwl_free_channel_map(priv);
3426         kfree(priv->scan);
3427 }
3428
3429 static struct attribute *iwl_sysfs_entries[] = {
3430         &dev_attr_flags.attr,
3431         &dev_attr_filter_flags.attr,
3432         &dev_attr_statistics.attr,
3433         &dev_attr_temperature.attr,
3434         &dev_attr_tx_power.attr,
3435         &dev_attr_rts_ht_protection.attr,
3436 #ifdef CONFIG_IWLWIFI_DEBUG
3437         &dev_attr_debug_level.attr,
3438 #endif
3439         NULL
3440 };
3441
3442 static struct attribute_group iwl_attribute_group = {
3443         .name = NULL,           /* put in device directory */
3444         .attrs = iwl_sysfs_entries,
3445 };
3446
3447 static struct ieee80211_ops iwl_hw_ops = {
3448         .tx = iwl_mac_tx,
3449         .start = iwl_mac_start,
3450         .stop = iwl_mac_stop,
3451         .add_interface = iwl_mac_add_interface,
3452         .remove_interface = iwl_mac_remove_interface,
3453         .config = iwl_mac_config,
3454         .configure_filter = iwl_configure_filter,
3455         .set_key = iwl_mac_set_key,
3456         .update_tkip_key = iwl_mac_update_tkip_key,
3457         .get_stats = iwl_mac_get_stats,
3458         .conf_tx = iwl_mac_conf_tx,
3459         .reset_tsf = iwl_mac_reset_tsf,
3460         .bss_info_changed = iwl_bss_info_changed,
3461         .ampdu_action = iwl_mac_ampdu_action,
3462         .hw_scan = iwl_mac_hw_scan,
3463         .sta_notify = iwl_mac_sta_notify,
3464 };
3465
3466 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3467 {
3468         int err = 0;
3469         struct iwl_priv *priv;
3470         struct ieee80211_hw *hw;
3471         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3472         unsigned long flags;
3473         u16 pci_cmd;
3474
3475         /************************
3476          * 1. Allocating HW data
3477          ************************/
3478
3479         /* Disabling hardware scan means that mac80211 will perform scans
3480          * "the hard way", rather than using device's scan. */
3481         if (cfg->mod_params->disable_hw_scan) {
3482                 if (iwl_debug_level & IWL_DL_INFO)
3483                         dev_printk(KERN_DEBUG, &(pdev->dev),
3484                                    "Disabling hw_scan\n");
3485                 iwl_hw_ops.hw_scan = NULL;
3486         }
3487
3488         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3489         if (!hw) {
3490                 err = -ENOMEM;
3491                 goto out;
3492         }
3493         priv = hw->priv;
3494         /* At this point both hw and priv are allocated. */
3495
3496         SET_IEEE80211_DEV(hw, &pdev->dev);
3497
3498         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3499         priv->cfg = cfg;
3500         priv->pci_dev = pdev;
3501         priv->inta_mask = CSR_INI_SET_MASK;
3502
3503 #ifdef CONFIG_IWLWIFI_DEBUG
3504         atomic_set(&priv->restrict_refcnt, 0);
3505 #endif
3506         if (iwl_alloc_traffic_mem(priv))
3507                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3508
3509         /**************************
3510          * 2. Initializing PCI bus
3511          **************************/
3512         if (pci_enable_device(pdev)) {
3513                 err = -ENODEV;
3514                 goto out_ieee80211_free_hw;
3515         }
3516
3517         pci_set_master(pdev);
3518
3519         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3520         if (!err)
3521                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3522         if (err) {
3523                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3524                 if (!err)
3525                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3526                 /* both attempts failed: */
3527                 if (err) {
3528                         IWL_WARN(priv, "No suitable DMA available.\n");
3529                         goto out_pci_disable_device;
3530                 }
3531         }
3532
3533         err = pci_request_regions(pdev, DRV_NAME);
3534         if (err)
3535                 goto out_pci_disable_device;
3536
3537         pci_set_drvdata(pdev, priv);
3538
3539
3540         /***********************
3541          * 3. Read REV register
3542          ***********************/
3543         priv->hw_base = pci_iomap(pdev, 0, 0);
3544         if (!priv->hw_base) {
3545                 err = -ENODEV;
3546                 goto out_pci_release_regions;
3547         }
3548
3549         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3550                 (unsigned long long) pci_resource_len(pdev, 0));
3551         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3552
3553         /* these spin locks will be used in apm_ops.init and EEPROM access
3554          * we should init now
3555          */
3556         spin_lock_init(&priv->reg_lock);
3557         spin_lock_init(&priv->lock);
3558
3559         /*
3560          * stop and reset the on-board processor just in case it is in a
3561          * strange state ... like being left stranded by a primary kernel
3562          * and this is now the kdump kernel trying to start up
3563          */
3564         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3565
3566         iwl_hw_detect(priv);
3567         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3568                 priv->cfg->name, priv->hw_rev);
3569
3570         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3571          * PCI Tx retries from interfering with C3 CPU state */
3572         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3573
3574         iwl_prepare_card_hw(priv);
3575         if (!priv->hw_ready) {
3576                 IWL_WARN(priv, "Failed, HW not ready\n");
3577                 goto out_iounmap;
3578         }
3579
3580         /*****************
3581          * 4. Read EEPROM
3582          *****************/
3583         /* Read the EEPROM */
3584         err = iwl_eeprom_init(priv);
3585         if (err) {
3586                 IWL_ERR(priv, "Unable to init EEPROM\n");
3587                 goto out_iounmap;
3588         }
3589         err = iwl_eeprom_check_version(priv);
3590         if (err)
3591                 goto out_free_eeprom;
3592
3593         /* extract MAC Address */
3594         iwl_eeprom_get_mac(priv, priv->mac_addr);
3595         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3596         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3597
3598         /************************
3599          * 5. Setup HW constants
3600          ************************/
3601         if (iwl_set_hw_params(priv)) {
3602                 IWL_ERR(priv, "failed to set hw parameters\n");
3603                 goto out_free_eeprom;
3604         }
3605
3606         /*******************
3607          * 6. Setup priv
3608          *******************/
3609
3610         err = iwl_init_drv(priv);
3611         if (err)
3612                 goto out_free_eeprom;
3613         /* At this point both hw and priv are initialized. */
3614
3615         /********************
3616          * 7. Setup services
3617          ********************/
3618         spin_lock_irqsave(&priv->lock, flags);
3619         iwl_disable_interrupts(priv);
3620         spin_unlock_irqrestore(&priv->lock, flags);
3621
3622         pci_enable_msi(priv->pci_dev);
3623
3624         iwl_alloc_isr_ict(priv);
3625         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3626                           IRQF_SHARED, DRV_NAME, priv);
3627         if (err) {
3628                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3629                 goto out_disable_msi;
3630         }
3631         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3632         if (err) {
3633                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3634                 goto out_free_irq;
3635         }
3636
3637         iwl_setup_deferred_work(priv);
3638         iwl_setup_rx_handlers(priv);
3639
3640         /*********************************************
3641          * 8. Enable interrupts and read RFKILL state
3642          *********************************************/
3643
3644         /* enable interrupts if needed: hw bug w/a */
3645         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3646         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3647                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3648                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3649         }
3650
3651         iwl_enable_interrupts(priv);
3652
3653         /* If platform's RF_KILL switch is NOT set to KILL */
3654         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3655                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3656         else
3657                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3658
3659         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3660                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3661
3662         iwl_power_initialize(priv);
3663         iwl_tt_initialize(priv);
3664
3665         err = iwl_request_firmware(priv, true);
3666         if (err)
3667                 goto out_remove_sysfs;
3668
3669         return 0;
3670
3671  out_remove_sysfs:
3672         destroy_workqueue(priv->workqueue);
3673         priv->workqueue = NULL;
3674         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3675  out_free_irq:
3676         free_irq(priv->pci_dev->irq, priv);
3677         iwl_free_isr_ict(priv);
3678  out_disable_msi:
3679         pci_disable_msi(priv->pci_dev);
3680         iwl_uninit_drv(priv);
3681  out_free_eeprom:
3682         iwl_eeprom_free(priv);
3683  out_iounmap:
3684         pci_iounmap(pdev, priv->hw_base);
3685  out_pci_release_regions:
3686         pci_set_drvdata(pdev, NULL);
3687         pci_release_regions(pdev);
3688  out_pci_disable_device:
3689         pci_disable_device(pdev);
3690  out_ieee80211_free_hw:
3691         iwl_free_traffic_mem(priv);
3692         ieee80211_free_hw(priv->hw);
3693  out:
3694         return err;
3695 }
3696
3697 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3698 {
3699         struct iwl_priv *priv = pci_get_drvdata(pdev);
3700         unsigned long flags;
3701
3702         if (!priv)
3703                 return;
3704
3705         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3706
3707         iwl_dbgfs_unregister(priv);
3708         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3709
3710         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3711          * to be called and iwl_down since we are removing the device
3712          * we need to set STATUS_EXIT_PENDING bit.
3713          */
3714         set_bit(STATUS_EXIT_PENDING, &priv->status);
3715         if (priv->mac80211_registered) {
3716                 ieee80211_unregister_hw(priv->hw);
3717                 priv->mac80211_registered = 0;
3718         } else {
3719                 iwl_down(priv);
3720         }
3721
3722         /*
3723          * Make sure device is reset to low power before unloading driver.
3724          * This may be redundant with iwl_down(), but there are paths to
3725          * run iwl_down() without calling apm_ops.stop(), and there are
3726          * paths to avoid running iwl_down() at all before leaving driver.
3727          * This (inexpensive) call *makes sure* device is reset.
3728          */
3729         priv->cfg->ops->lib->apm_ops.stop(priv);
3730
3731         iwl_tt_exit(priv);
3732
3733         /* make sure we flush any pending irq or
3734          * tasklet for the driver
3735          */
3736         spin_lock_irqsave(&priv->lock, flags);
3737         iwl_disable_interrupts(priv);
3738         spin_unlock_irqrestore(&priv->lock, flags);
3739
3740         iwl_synchronize_irq(priv);
3741
3742         iwl_dealloc_ucode_pci(priv);
3743
3744         if (priv->rxq.bd)
3745                 iwl_rx_queue_free(priv, &priv->rxq);
3746         iwl_hw_txq_ctx_free(priv);
3747
3748         iwl_clear_stations_table(priv);
3749         iwl_eeprom_free(priv);
3750
3751
3752         /*netif_stop_queue(dev); */
3753         flush_workqueue(priv->workqueue);
3754
3755         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3756          * priv->workqueue... so we can't take down the workqueue
3757          * until now... */
3758         destroy_workqueue(priv->workqueue);
3759         priv->workqueue = NULL;
3760         iwl_free_traffic_mem(priv);
3761
3762         free_irq(priv->pci_dev->irq, priv);
3763         pci_disable_msi(priv->pci_dev);
3764         pci_iounmap(pdev, priv->hw_base);
3765         pci_release_regions(pdev);
3766         pci_disable_device(pdev);
3767         pci_set_drvdata(pdev, NULL);
3768
3769         iwl_uninit_drv(priv);
3770
3771         iwl_free_isr_ict(priv);
3772
3773         if (priv->ibss_beacon)
3774                 dev_kfree_skb(priv->ibss_beacon);
3775
3776         ieee80211_free_hw(priv->hw);
3777 }
3778
3779
3780 /*****************************************************************************
3781  *
3782  * driver and module entry point
3783  *
3784  *****************************************************************************/
3785
3786 /* Hardware specific file defines the PCI IDs table for that hardware module */
3787 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
3788 #ifdef CONFIG_IWL4965
3789         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3790         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3791 #endif /* CONFIG_IWL4965 */
3792 #ifdef CONFIG_IWL5000
3793 /* 5100 Series WiFi */
3794         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3795         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3796         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3797         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3798         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3799         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3800         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3801         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3802         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3803         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3804         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3805         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3806         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3807         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3808         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3809         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3810         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3811         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3812         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3813         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3814         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3815         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3816         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3817         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3818
3819 /* 5300 Series WiFi */
3820         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3821         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3822         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3823         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3824         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3825         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3826         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3827         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3828         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3829         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3830         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3831         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3832
3833 /* 5350 Series WiFi/WiMax */
3834         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3835         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3836         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3837
3838 /* 5150 Series Wifi/WiMax */
3839         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3840         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3841         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3842         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3843         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3844         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3845
3846         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3847         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3848         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3849         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3850
3851 /* 6x00 Series */
3852         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3853         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3854         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3855         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3856         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3857         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3858         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3859         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3860         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3861         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3862
3863 /* 6x50 WiFi/WiMax Series */
3864         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3865         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3866         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3867         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3868         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3869         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3870
3871 /* 1000 Series WiFi */
3872         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3873         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3874         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3875         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3876         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3877         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3878         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3879         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3880         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3881         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3882         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3883         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3884 #endif /* CONFIG_IWL5000 */
3885
3886         {0}
3887 };
3888 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3889
3890 static struct pci_driver iwl_driver = {
3891         .name = DRV_NAME,
3892         .id_table = iwl_hw_card_ids,
3893         .probe = iwl_pci_probe,
3894         .remove = __devexit_p(iwl_pci_remove),
3895 #ifdef CONFIG_PM
3896         .suspend = iwl_pci_suspend,
3897         .resume = iwl_pci_resume,
3898 #endif
3899 };
3900
3901 static int __init iwl_init(void)
3902 {
3903
3904         int ret;
3905         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3906         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3907
3908         ret = iwlagn_rate_control_register();
3909         if (ret) {
3910                 printk(KERN_ERR DRV_NAME
3911                        "Unable to register rate control algorithm: %d\n", ret);
3912                 return ret;
3913         }
3914
3915         ret = pci_register_driver(&iwl_driver);
3916         if (ret) {
3917                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3918                 goto error_register;
3919         }
3920
3921         return ret;
3922
3923 error_register:
3924         iwlagn_rate_control_unregister();
3925         return ret;
3926 }
3927
3928 static void __exit iwl_exit(void)
3929 {
3930         pci_unregister_driver(&iwl_driver);
3931         iwlagn_rate_control_unregister();
3932 }
3933
3934 module_exit(iwl_exit);
3935 module_init(iwl_init);
3936
3937 #ifdef CONFIG_IWLWIFI_DEBUG
3938 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3939 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3940 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3941 MODULE_PARM_DESC(debug, "debug output mask");
3942 #endif
3943