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[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-agn.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2009 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/skbuff.h>
37 #include <linux/netdevice.h>
38 #include <linux/wireless.h>
39 #include <linux/firmware.h>
40 #include <linux/etherdevice.h>
41 #include <linux/if_arp.h>
42
43 #include <net/mac80211.h>
44
45 #include <asm/div64.h>
46
47 #define DRV_NAME        "iwlagn"
48
49 #include "iwl-eeprom.h"
50 #include "iwl-dev.h"
51 #include "iwl-core.h"
52 #include "iwl-io.h"
53 #include "iwl-helpers.h"
54 #include "iwl-sta.h"
55 #include "iwl-calib.h"
56
57
58 /******************************************************************************
59  *
60  * module boiler plate
61  *
62  ******************************************************************************/
63
64 /*
65  * module name, copyright, version, etc.
66  */
67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
68
69 #ifdef CONFIG_IWLWIFI_DEBUG
70 #define VD "d"
71 #else
72 #define VD
73 #endif
74
75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
76 #define VS "s"
77 #else
78 #define VS
79 #endif
80
81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88 MODULE_ALIAS("iwl4965");
89
90 /*************** STATION TABLE MANAGEMENT ****
91  * mac80211 should be examined to determine if sta_info is duplicating
92  * the functionality provided here
93  */
94
95 /**************************************************************/
96
97 /**
98  * iwl_commit_rxon - commit staging_rxon to hardware
99  *
100  * The RXON command in staging_rxon is committed to the hardware and
101  * the active_rxon structure is updated with the new data.  This
102  * function correctly transitions out of the RXON_ASSOC_MSK state if
103  * a HW tune is required based on the RXON structure changes.
104  */
105 int iwl_commit_rxon(struct iwl_priv *priv)
106 {
107         /* cast away the const for active_rxon in this function */
108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
109         int ret;
110         bool new_assoc =
111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
112
113         if (!iwl_is_alive(priv))
114                 return -EBUSY;
115
116         /* always get timestamp with Rx frame */
117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
118         /* allow CTS-to-self if possible. this is relevant only for
119          * 5000, but will not damage 4965 */
120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
121
122         ret = iwl_check_rxon_cmd(priv);
123         if (ret) {
124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
125                 return -EINVAL;
126         }
127
128         /* If we don't need to send a full RXON, we can use
129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
130          * and other flags for the current radio configuration. */
131         if (!iwl_full_rxon_required(priv)) {
132                 ret = iwl_send_rxon_assoc(priv);
133                 if (ret) {
134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
135                         return ret;
136                 }
137
138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
139                 return 0;
140         }
141
142         /* station table will be cleared */
143         priv->assoc_station_added = 0;
144
145         /* If we are currently associated and the new config requires
146          * an RXON_ASSOC and the new config wants the associated mask enabled,
147          * we must clear the associated from the active configuration
148          * before we apply the new config */
149         if (iwl_is_associated(priv) && new_assoc) {
150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
152
153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
154                                       sizeof(struct iwl_rxon_cmd),
155                                       &priv->active_rxon);
156
157                 /* If the mask clearing failed then we set
158                  * active_rxon back to what it was previously */
159                 if (ret) {
160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
162                         return ret;
163                 }
164         }
165
166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
168                        "* channel = %d\n"
169                        "* bssid = %pM\n",
170                        (new_assoc ? "" : "out"),
171                        le16_to_cpu(priv->staging_rxon.channel),
172                        priv->staging_rxon.bssid_addr);
173
174         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
175
176         /* Apply the new configuration
177          * RXON unassoc clears the station table in uCode, send it before
178          * we add the bcast station. If assoc bit is set, we will send RXON
179          * after having added the bcast and bssid station.
180          */
181         if (!new_assoc) {
182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
184                 if (ret) {
185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
186                         return ret;
187                 }
188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
189         }
190
191         iwl_clear_stations_table(priv);
192
193         priv->start_calib = 0;
194
195         /* Add the broadcast address so we can send broadcast frames */
196         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
197                                                 IWL_INVALID_STATION) {
198                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
199                 return -EIO;
200         }
201
202         /* If we have set the ASSOC_MSK and we are in BSS mode then
203          * add the IWL_AP_ID to the station rate table */
204         if (new_assoc) {
205                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
206                         ret = iwl_rxon_add_station(priv,
207                                            priv->active_rxon.bssid_addr, 1);
208                         if (ret == IWL_INVALID_STATION) {
209                                 IWL_ERR(priv,
210                                         "Error adding AP address for TX.\n");
211                                 return -EIO;
212                         }
213                         priv->assoc_station_added = 1;
214                         if (priv->default_wep_key &&
215                             iwl_send_static_wepkey_cmd(priv, 0))
216                                 IWL_ERR(priv,
217                                         "Could not send WEP static key.\n");
218                 }
219
220                 /* Apply the new configuration
221                  * RXON assoc doesn't clear the station table in uCode,
222                  */
223                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
224                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
225                 if (ret) {
226                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
227                         return ret;
228                 }
229                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
230         }
231
232         iwl_init_sensitivity(priv);
233
234         /* If we issue a new RXON command which required a tune then we must
235          * send a new TXPOWER command or we won't be able to Tx any frames */
236         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
237         if (ret) {
238                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
239                 return ret;
240         }
241
242         return 0;
243 }
244
245 void iwl_update_chain_flags(struct iwl_priv *priv)
246 {
247
248         if (priv->cfg->ops->hcmd->set_rxon_chain)
249                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
250         iwlcore_commit_rxon(priv);
251 }
252
253 static void iwl_clear_free_frames(struct iwl_priv *priv)
254 {
255         struct list_head *element;
256
257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
258                        priv->frames_count);
259
260         while (!list_empty(&priv->free_frames)) {
261                 element = priv->free_frames.next;
262                 list_del(element);
263                 kfree(list_entry(element, struct iwl_frame, list));
264                 priv->frames_count--;
265         }
266
267         if (priv->frames_count) {
268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
269                             priv->frames_count);
270                 priv->frames_count = 0;
271         }
272 }
273
274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
275 {
276         struct iwl_frame *frame;
277         struct list_head *element;
278         if (list_empty(&priv->free_frames)) {
279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
280                 if (!frame) {
281                         IWL_ERR(priv, "Could not allocate frame!\n");
282                         return NULL;
283                 }
284
285                 priv->frames_count++;
286                 return frame;
287         }
288
289         element = priv->free_frames.next;
290         list_del(element);
291         return list_entry(element, struct iwl_frame, list);
292 }
293
294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
295 {
296         memset(frame, 0, sizeof(*frame));
297         list_add(&frame->list, &priv->free_frames);
298 }
299
300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
301                                           struct ieee80211_hdr *hdr,
302                                           int left)
303 {
304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
306              (priv->iw_mode != NL80211_IFTYPE_AP)))
307                 return 0;
308
309         if (priv->ibss_beacon->len > left)
310                 return 0;
311
312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
313
314         return priv->ibss_beacon->len;
315 }
316
317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
318                                        struct iwl_frame *frame, u8 rate)
319 {
320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
321         unsigned int frame_size;
322
323         tx_beacon_cmd = &frame->u.beacon;
324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
325
326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
328
329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
331
332         BUG_ON(frame_size > MAX_MPDU_SIZE);
333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
334
335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
336                 tx_beacon_cmd->tx.rate_n_flags =
337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
338         else
339                 tx_beacon_cmd->tx.rate_n_flags =
340                         iwl_hw_set_rate_n_flags(rate, 0);
341
342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
343                                      TX_CMD_FLG_TSF_MSK |
344                                      TX_CMD_FLG_STA_RATE_MSK;
345
346         return sizeof(*tx_beacon_cmd) + frame_size;
347 }
348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
349 {
350         struct iwl_frame *frame;
351         unsigned int frame_size;
352         int rc;
353         u8 rate;
354
355         frame = iwl_get_free_frame(priv);
356
357         if (!frame) {
358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
359                           "command.\n");
360                 return -ENOMEM;
361         }
362
363         rate = iwl_rate_get_lowest_plcp(priv);
364
365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
366
367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
368                               &frame->u.cmd[0]);
369
370         iwl_free_frame(priv, frame);
371
372         return rc;
373 }
374
375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
376 {
377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
378
379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
380         if (sizeof(dma_addr_t) > sizeof(u32))
381                 addr |=
382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
383
384         return addr;
385 }
386
387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
388 {
389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
390
391         return le16_to_cpu(tb->hi_n_len) >> 4;
392 }
393
394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
395                                   dma_addr_t addr, u16 len)
396 {
397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
398         u16 hi_n_len = len << 4;
399
400         put_unaligned_le32(addr, &tb->lo);
401         if (sizeof(dma_addr_t) > sizeof(u32))
402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
403
404         tb->hi_n_len = cpu_to_le16(hi_n_len);
405
406         tfd->num_tbs = idx + 1;
407 }
408
409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
410 {
411         return tfd->num_tbs & 0x1f;
412 }
413
414 /**
415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
416  * @priv - driver private data
417  * @txq - tx queue
418  *
419  * Does NOT advance any TFD circular buffer read/write indexes
420  * Does NOT free the TFD itself (which is within circular buffer)
421  */
422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
423 {
424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
425         struct iwl_tfd *tfd;
426         struct pci_dev *dev = priv->pci_dev;
427         int index = txq->q.read_ptr;
428         int i;
429         int num_tbs;
430
431         tfd = &tfd_tmp[index];
432
433         /* Sanity check on number of chunks */
434         num_tbs = iwl_tfd_get_num_tbs(tfd);
435
436         if (num_tbs >= IWL_NUM_OF_TBS) {
437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
438                 /* @todo issue fatal error, it is quite serious situation */
439                 return;
440         }
441
442         /* Unmap tx_cmd */
443         if (num_tbs)
444                 pci_unmap_single(dev,
445                                 pci_unmap_addr(&txq->meta[index], mapping),
446                                 pci_unmap_len(&txq->meta[index], len),
447                                 PCI_DMA_BIDIRECTIONAL);
448
449         /* Unmap chunks, if any. */
450         for (i = 1; i < num_tbs; i++) {
451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
453
454                 if (txq->txb) {
455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
457                 }
458         }
459 }
460
461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
462                                  struct iwl_tx_queue *txq,
463                                  dma_addr_t addr, u16 len,
464                                  u8 reset, u8 pad)
465 {
466         struct iwl_queue *q;
467         struct iwl_tfd *tfd, *tfd_tmp;
468         u32 num_tbs;
469
470         q = &txq->q;
471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
472         tfd = &tfd_tmp[q->write_ptr];
473
474         if (reset)
475                 memset(tfd, 0, sizeof(*tfd));
476
477         num_tbs = iwl_tfd_get_num_tbs(tfd);
478
479         /* Each TFD can point to a maximum 20 Tx buffers */
480         if (num_tbs >= IWL_NUM_OF_TBS) {
481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
482                           IWL_NUM_OF_TBS);
483                 return -EINVAL;
484         }
485
486         BUG_ON(addr & ~DMA_BIT_MASK(36));
487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
488                 IWL_ERR(priv, "Unaligned address = %llx\n",
489                           (unsigned long long)addr);
490
491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
492
493         return 0;
494 }
495
496 /*
497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
498  * given Tx queue, and enable the DMA channel used for that queue.
499  *
500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
501  * channels supported in hardware.
502  */
503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
504                          struct iwl_tx_queue *txq)
505 {
506         int txq_id = txq->q.id;
507
508         /* Circular buffer (TFD queue in DRAM) physical base address */
509         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
510                              txq->q.dma_addr >> 8);
511
512         return 0;
513 }
514
515 /******************************************************************************
516  *
517  * Generic RX handler implementations
518  *
519  ******************************************************************************/
520 static void iwl_rx_reply_alive(struct iwl_priv *priv,
521                                 struct iwl_rx_mem_buffer *rxb)
522 {
523         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
524         struct iwl_alive_resp *palive;
525         struct delayed_work *pwork;
526
527         palive = &pkt->u.alive_frame;
528
529         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
530                        "0x%01X 0x%01X\n",
531                        palive->is_valid, palive->ver_type,
532                        palive->ver_subtype);
533
534         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
535                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
536                 memcpy(&priv->card_alive_init,
537                        &pkt->u.alive_frame,
538                        sizeof(struct iwl_init_alive_resp));
539                 pwork = &priv->init_alive_start;
540         } else {
541                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
542                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
543                        sizeof(struct iwl_alive_resp));
544                 pwork = &priv->alive_start;
545         }
546
547         /* We delay the ALIVE response by 5ms to
548          * give the HW RF Kill time to activate... */
549         if (palive->is_valid == UCODE_VALID_OK)
550                 queue_delayed_work(priv->workqueue, pwork,
551                                    msecs_to_jiffies(5));
552         else
553                 IWL_WARN(priv, "uCode did not respond OK.\n");
554 }
555
556 static void iwl_bg_beacon_update(struct work_struct *work)
557 {
558         struct iwl_priv *priv =
559                 container_of(work, struct iwl_priv, beacon_update);
560         struct sk_buff *beacon;
561
562         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
563         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
564
565         if (!beacon) {
566                 IWL_ERR(priv, "update beacon failed\n");
567                 return;
568         }
569
570         mutex_lock(&priv->mutex);
571         /* new beacon skb is allocated every time; dispose previous.*/
572         if (priv->ibss_beacon)
573                 dev_kfree_skb(priv->ibss_beacon);
574
575         priv->ibss_beacon = beacon;
576         mutex_unlock(&priv->mutex);
577
578         iwl_send_beacon_cmd(priv);
579 }
580
581 /**
582  * iwl_bg_statistics_periodic - Timer callback to queue statistics
583  *
584  * This callback is provided in order to send a statistics request.
585  *
586  * This timer function is continually reset to execute within
587  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
588  * was received.  We need to ensure we receive the statistics in order
589  * to update the temperature used for calibrating the TXPOWER.
590  */
591 static void iwl_bg_statistics_periodic(unsigned long data)
592 {
593         struct iwl_priv *priv = (struct iwl_priv *)data;
594
595         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
596                 return;
597
598         /* dont send host command if rf-kill is on */
599         if (!iwl_is_ready_rf(priv))
600                 return;
601
602         iwl_send_statistics_request(priv, CMD_ASYNC);
603 }
604
605 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
606                                 struct iwl_rx_mem_buffer *rxb)
607 {
608 #ifdef CONFIG_IWLWIFI_DEBUG
609         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
610         struct iwl4965_beacon_notif *beacon =
611                 (struct iwl4965_beacon_notif *)pkt->u.raw;
612         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
613
614         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
615                 "tsf %d %d rate %d\n",
616                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
617                 beacon->beacon_notify_hdr.failure_frame,
618                 le32_to_cpu(beacon->ibss_mgr_status),
619                 le32_to_cpu(beacon->high_tsf),
620                 le32_to_cpu(beacon->low_tsf), rate);
621 #endif
622
623         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
624             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
625                 queue_work(priv->workqueue, &priv->beacon_update);
626 }
627
628 /* Handle notification from uCode that card's power state is changing
629  * due to software, hardware, or critical temperature RFKILL */
630 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
631                                     struct iwl_rx_mem_buffer *rxb)
632 {
633         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
634         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
635         unsigned long status = priv->status;
636
637         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
638                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
639                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
640
641         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
642                      RF_CARD_DISABLED)) {
643
644                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
645                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
646
647                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
648                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
649
650                 if (!(flags & RXON_CARD_DISABLED)) {
651                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
652                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
653                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
654                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
655                 }
656                 if (flags & RF_CARD_DISABLED)
657                         iwl_tt_enter_ct_kill(priv);
658         }
659         if (!(flags & RF_CARD_DISABLED))
660                 iwl_tt_exit_ct_kill(priv);
661
662         if (flags & HW_CARD_DISABLED)
663                 set_bit(STATUS_RF_KILL_HW, &priv->status);
664         else
665                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
666
667
668         if (!(flags & RXON_CARD_DISABLED))
669                 iwl_scan_cancel(priv);
670
671         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
672              test_bit(STATUS_RF_KILL_HW, &priv->status)))
673                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
674                         test_bit(STATUS_RF_KILL_HW, &priv->status));
675         else
676                 wake_up_interruptible(&priv->wait_command_queue);
677 }
678
679 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
680 {
681         if (src == IWL_PWR_SRC_VAUX) {
682                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
683                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
684                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
685                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
686         } else {
687                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
688                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
689                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
690         }
691
692         return 0;
693 }
694
695 /**
696  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
697  *
698  * Setup the RX handlers for each of the reply types sent from the uCode
699  * to the host.
700  *
701  * This function chains into the hardware specific files for them to setup
702  * any hardware specific handlers as well.
703  */
704 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
705 {
706         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
707         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
708         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
709         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
710         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
711             iwl_rx_pm_debug_statistics_notif;
712         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
713
714         /*
715          * The same handler is used for both the REPLY to a discrete
716          * statistics request from the host as well as for the periodic
717          * statistics notifications (after received beacons) from the uCode.
718          */
719         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
720         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
721
722         iwl_setup_spectrum_handlers(priv);
723         iwl_setup_rx_scan_handlers(priv);
724
725         /* status change handler */
726         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
727
728         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
729             iwl_rx_missed_beacon_notif;
730         /* Rx handlers */
731         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
732         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
733         /* block ack */
734         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
735         /* Set up hardware specific Rx handlers */
736         priv->cfg->ops->lib->rx_handler_setup(priv);
737 }
738
739 /**
740  * iwl_rx_handle - Main entry function for receiving responses from uCode
741  *
742  * Uses the priv->rx_handlers callback function array to invoke
743  * the appropriate handlers, including command responses,
744  * frame-received notifications, and other notifications.
745  */
746 void iwl_rx_handle(struct iwl_priv *priv)
747 {
748         struct iwl_rx_mem_buffer *rxb;
749         struct iwl_rx_packet *pkt;
750         struct iwl_rx_queue *rxq = &priv->rxq;
751         u32 r, i;
752         int reclaim;
753         unsigned long flags;
754         u8 fill_rx = 0;
755         u32 count = 8;
756         int total_empty;
757
758         /* uCode's read index (stored in shared DRAM) indicates the last Rx
759          * buffer that the driver may process (last buffer filled by ucode). */
760         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
761         i = rxq->read;
762
763         /* Rx interrupt, but nothing sent from uCode */
764         if (i == r)
765                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
766
767         /* calculate total frames need to be restock after handling RX */
768         total_empty = r - priv->rxq.write_actual;
769         if (total_empty < 0)
770                 total_empty += RX_QUEUE_SIZE;
771
772         if (total_empty > (RX_QUEUE_SIZE / 2))
773                 fill_rx = 1;
774
775         while (i != r) {
776                 rxb = rxq->queue[i];
777
778                 /* If an RXB doesn't have a Rx queue slot associated with it,
779                  * then a bug has been introduced in the queue refilling
780                  * routines -- catch it here */
781                 BUG_ON(rxb == NULL);
782
783                 rxq->queue[i] = NULL;
784
785                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
786                                  priv->hw_params.rx_buf_size + 256,
787                                  PCI_DMA_FROMDEVICE);
788                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
789
790                 /* Reclaim a command buffer only if this packet is a response
791                  *   to a (driver-originated) command.
792                  * If the packet (e.g. Rx frame) originated from uCode,
793                  *   there is no command buffer to reclaim.
794                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
795                  *   but apparently a few don't get set; catch them here. */
796                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
797                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
798                         (pkt->hdr.cmd != REPLY_RX) &&
799                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
800                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
801                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
802                         (pkt->hdr.cmd != REPLY_TX);
803
804                 /* Based on type of command response or notification,
805                  *   handle those that need handling via function in
806                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
807                 if (priv->rx_handlers[pkt->hdr.cmd]) {
808                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
809                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
810                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
811                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
812                 } else {
813                         /* No handling needed */
814                         IWL_DEBUG_RX(priv,
815                                 "r %d i %d No handler needed for %s, 0x%02x\n",
816                                 r, i, get_cmd_string(pkt->hdr.cmd),
817                                 pkt->hdr.cmd);
818                 }
819
820                 if (reclaim) {
821                         /* Invoke any callbacks, transfer the skb to caller, and
822                          * fire off the (possibly) blocking iwl_send_cmd()
823                          * as we reclaim the driver command queue */
824                         if (rxb && rxb->skb)
825                                 iwl_tx_cmd_complete(priv, rxb);
826                         else
827                                 IWL_WARN(priv, "Claim null rxb?\n");
828                 }
829
830                 /* For now we just don't re-use anything.  We can tweak this
831                  * later to try and re-use notification packets and SKBs that
832                  * fail to Rx correctly */
833                 if (rxb->skb != NULL) {
834                         priv->alloc_rxb_skb--;
835                         dev_kfree_skb_any(rxb->skb);
836                         rxb->skb = NULL;
837                 }
838
839                 spin_lock_irqsave(&rxq->lock, flags);
840                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
841                 spin_unlock_irqrestore(&rxq->lock, flags);
842                 i = (i + 1) & RX_QUEUE_MASK;
843                 /* If there are a lot of unused frames,
844                  * restock the Rx queue so ucode wont assert. */
845                 if (fill_rx) {
846                         count++;
847                         if (count >= 8) {
848                                 priv->rxq.read = i;
849                                 iwl_rx_replenish_now(priv);
850                                 count = 0;
851                         }
852                 }
853         }
854
855         /* Backtrack one entry */
856         priv->rxq.read = i;
857         if (fill_rx)
858                 iwl_rx_replenish_now(priv);
859         else
860                 iwl_rx_queue_restock(priv);
861 }
862
863 /* call this function to flush any scheduled tasklet */
864 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
865 {
866         /* wait to make sure we flush pending tasklet*/
867         synchronize_irq(priv->pci_dev->irq);
868         tasklet_kill(&priv->irq_tasklet);
869 }
870
871 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
872 {
873         u32 inta, handled = 0;
874         u32 inta_fh;
875         unsigned long flags;
876 #ifdef CONFIG_IWLWIFI_DEBUG
877         u32 inta_mask;
878 #endif
879
880         spin_lock_irqsave(&priv->lock, flags);
881
882         /* Ack/clear/reset pending uCode interrupts.
883          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
884          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
885         inta = iwl_read32(priv, CSR_INT);
886         iwl_write32(priv, CSR_INT, inta);
887
888         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
889          * Any new interrupts that happen after this, either while we're
890          * in this tasklet, or later, will show up in next ISR/tasklet. */
891         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
892         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
893
894 #ifdef CONFIG_IWLWIFI_DEBUG
895         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
896                 /* just for debug */
897                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
898                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
899                               inta, inta_mask, inta_fh);
900         }
901 #endif
902
903         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
904          * atomic, make sure that inta covers all the interrupts that
905          * we've discovered, even if FH interrupt came in just after
906          * reading CSR_INT. */
907         if (inta_fh & CSR49_FH_INT_RX_MASK)
908                 inta |= CSR_INT_BIT_FH_RX;
909         if (inta_fh & CSR49_FH_INT_TX_MASK)
910                 inta |= CSR_INT_BIT_FH_TX;
911
912         /* Now service all interrupt bits discovered above. */
913         if (inta & CSR_INT_BIT_HW_ERR) {
914                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
915
916                 /* Tell the device to stop sending interrupts */
917                 iwl_disable_interrupts(priv);
918
919                 priv->isr_stats.hw++;
920                 iwl_irq_handle_error(priv);
921
922                 handled |= CSR_INT_BIT_HW_ERR;
923
924                 spin_unlock_irqrestore(&priv->lock, flags);
925
926                 return;
927         }
928
929 #ifdef CONFIG_IWLWIFI_DEBUG
930         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
931                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
932                 if (inta & CSR_INT_BIT_SCD) {
933                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
934                                       "the frame/frames.\n");
935                         priv->isr_stats.sch++;
936                 }
937
938                 /* Alive notification via Rx interrupt will do the real work */
939                 if (inta & CSR_INT_BIT_ALIVE) {
940                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
941                         priv->isr_stats.alive++;
942                 }
943         }
944 #endif
945         /* Safely ignore these bits for debug checks below */
946         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
947
948         /* HW RF KILL switch toggled */
949         if (inta & CSR_INT_BIT_RF_KILL) {
950                 int hw_rf_kill = 0;
951                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
952                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
953                         hw_rf_kill = 1;
954
955                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
956                                 hw_rf_kill ? "disable radio" : "enable radio");
957
958                 priv->isr_stats.rfkill++;
959
960                 /* driver only loads ucode once setting the interface up.
961                  * the driver allows loading the ucode even if the radio
962                  * is killed. Hence update the killswitch state here. The
963                  * rfkill handler will care about restarting if needed.
964                  */
965                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
966                         if (hw_rf_kill)
967                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
968                         else
969                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
970                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
971                 }
972
973                 handled |= CSR_INT_BIT_RF_KILL;
974         }
975
976         /* Chip got too hot and stopped itself */
977         if (inta & CSR_INT_BIT_CT_KILL) {
978                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
979                 priv->isr_stats.ctkill++;
980                 handled |= CSR_INT_BIT_CT_KILL;
981         }
982
983         /* Error detected by uCode */
984         if (inta & CSR_INT_BIT_SW_ERR) {
985                 IWL_ERR(priv, "Microcode SW error detected. "
986                         " Restarting 0x%X.\n", inta);
987                 priv->isr_stats.sw++;
988                 priv->isr_stats.sw_err = inta;
989                 iwl_irq_handle_error(priv);
990                 handled |= CSR_INT_BIT_SW_ERR;
991         }
992
993         /* uCode wakes up after power-down sleep */
994         if (inta & CSR_INT_BIT_WAKEUP) {
995                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
996                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
997                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
998                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
999                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1000                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1001                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1002                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1003
1004                 priv->isr_stats.wakeup++;
1005
1006                 handled |= CSR_INT_BIT_WAKEUP;
1007         }
1008
1009         /* All uCode command responses, including Tx command responses,
1010          * Rx "responses" (frame-received notification), and other
1011          * notifications from uCode come through here*/
1012         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1013                 iwl_rx_handle(priv);
1014                 priv->isr_stats.rx++;
1015                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1016         }
1017
1018         if (inta & CSR_INT_BIT_FH_TX) {
1019                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1020                 priv->isr_stats.tx++;
1021                 handled |= CSR_INT_BIT_FH_TX;
1022                 /* FH finished to write, send event */
1023                 priv->ucode_write_complete = 1;
1024                 wake_up_interruptible(&priv->wait_command_queue);
1025         }
1026
1027         if (inta & ~handled) {
1028                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1029                 priv->isr_stats.unhandled++;
1030         }
1031
1032         if (inta & ~(priv->inta_mask)) {
1033                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1034                          inta & ~priv->inta_mask);
1035                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1036         }
1037
1038         /* Re-enable all interrupts */
1039         /* only Re-enable if diabled by irq */
1040         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1041                 iwl_enable_interrupts(priv);
1042
1043 #ifdef CONFIG_IWLWIFI_DEBUG
1044         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1045                 inta = iwl_read32(priv, CSR_INT);
1046                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1047                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1048                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1049                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1050         }
1051 #endif
1052         spin_unlock_irqrestore(&priv->lock, flags);
1053 }
1054
1055 /* tasklet for iwlagn interrupt */
1056 static void iwl_irq_tasklet(struct iwl_priv *priv)
1057 {
1058         u32 inta = 0;
1059         u32 handled = 0;
1060         unsigned long flags;
1061 #ifdef CONFIG_IWLWIFI_DEBUG
1062         u32 inta_mask;
1063 #endif
1064
1065         spin_lock_irqsave(&priv->lock, flags);
1066
1067         /* Ack/clear/reset pending uCode interrupts.
1068          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1069          */
1070         iwl_write32(priv, CSR_INT, priv->inta);
1071
1072         inta = priv->inta;
1073
1074 #ifdef CONFIG_IWLWIFI_DEBUG
1075         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1076                 /* just for debug */
1077                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1078                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1079                                 inta, inta_mask);
1080         }
1081 #endif
1082         /* saved interrupt in inta variable now we can reset priv->inta */
1083         priv->inta = 0;
1084
1085         /* Now service all interrupt bits discovered above. */
1086         if (inta & CSR_INT_BIT_HW_ERR) {
1087                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1088
1089                 /* Tell the device to stop sending interrupts */
1090                 iwl_disable_interrupts(priv);
1091
1092                 priv->isr_stats.hw++;
1093                 iwl_irq_handle_error(priv);
1094
1095                 handled |= CSR_INT_BIT_HW_ERR;
1096
1097                 spin_unlock_irqrestore(&priv->lock, flags);
1098
1099                 return;
1100         }
1101
1102 #ifdef CONFIG_IWLWIFI_DEBUG
1103         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1104                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1105                 if (inta & CSR_INT_BIT_SCD) {
1106                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1107                                       "the frame/frames.\n");
1108                         priv->isr_stats.sch++;
1109                 }
1110
1111                 /* Alive notification via Rx interrupt will do the real work */
1112                 if (inta & CSR_INT_BIT_ALIVE) {
1113                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1114                         priv->isr_stats.alive++;
1115                 }
1116         }
1117 #endif
1118         /* Safely ignore these bits for debug checks below */
1119         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1120
1121         /* HW RF KILL switch toggled */
1122         if (inta & CSR_INT_BIT_RF_KILL) {
1123                 int hw_rf_kill = 0;
1124                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1125                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1126                         hw_rf_kill = 1;
1127
1128                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1129                                 hw_rf_kill ? "disable radio" : "enable radio");
1130
1131                 priv->isr_stats.rfkill++;
1132
1133                 /* driver only loads ucode once setting the interface up.
1134                  * the driver allows loading the ucode even if the radio
1135                  * is killed. Hence update the killswitch state here. The
1136                  * rfkill handler will care about restarting if needed.
1137                  */
1138                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1139                         if (hw_rf_kill)
1140                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1141                         else
1142                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1143                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1144                 }
1145
1146                 handled |= CSR_INT_BIT_RF_KILL;
1147         }
1148
1149         /* Chip got too hot and stopped itself */
1150         if (inta & CSR_INT_BIT_CT_KILL) {
1151                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1152                 priv->isr_stats.ctkill++;
1153                 handled |= CSR_INT_BIT_CT_KILL;
1154         }
1155
1156         /* Error detected by uCode */
1157         if (inta & CSR_INT_BIT_SW_ERR) {
1158                 IWL_ERR(priv, "Microcode SW error detected. "
1159                         " Restarting 0x%X.\n", inta);
1160                 priv->isr_stats.sw++;
1161                 priv->isr_stats.sw_err = inta;
1162                 iwl_irq_handle_error(priv);
1163                 handled |= CSR_INT_BIT_SW_ERR;
1164         }
1165
1166         /* uCode wakes up after power-down sleep */
1167         if (inta & CSR_INT_BIT_WAKEUP) {
1168                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1169                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1170                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1171                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1172                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1173                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1174                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1175                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1176
1177                 priv->isr_stats.wakeup++;
1178
1179                 handled |= CSR_INT_BIT_WAKEUP;
1180         }
1181
1182         /* All uCode command responses, including Tx command responses,
1183          * Rx "responses" (frame-received notification), and other
1184          * notifications from uCode come through here*/
1185         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1186                         CSR_INT_BIT_RX_PERIODIC)) {
1187                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1188                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1189                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1190                         iwl_write32(priv, CSR_FH_INT_STATUS,
1191                                         CSR49_FH_INT_RX_MASK);
1192                 }
1193                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1194                         handled |= CSR_INT_BIT_RX_PERIODIC;
1195                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1196                 }
1197                 /* Sending RX interrupt require many steps to be done in the
1198                  * the device:
1199                  * 1- write interrupt to current index in ICT table.
1200                  * 2- dma RX frame.
1201                  * 3- update RX shared data to indicate last write index.
1202                  * 4- send interrupt.
1203                  * This could lead to RX race, driver could receive RX interrupt
1204                  * but the shared data changes does not reflect this.
1205                  * this could lead to RX race, RX periodic will solve this race
1206                  */
1207                 iwl_write32(priv, CSR_INT_PERIODIC_REG,
1208                             CSR_INT_PERIODIC_DIS);
1209                 iwl_rx_handle(priv);
1210                 /* Only set RX periodic if real RX is received. */
1211                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1212                         iwl_write32(priv, CSR_INT_PERIODIC_REG,
1213                                     CSR_INT_PERIODIC_ENA);
1214
1215                 priv->isr_stats.rx++;
1216         }
1217
1218         if (inta & CSR_INT_BIT_FH_TX) {
1219                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1220                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1221                 priv->isr_stats.tx++;
1222                 handled |= CSR_INT_BIT_FH_TX;
1223                 /* FH finished to write, send event */
1224                 priv->ucode_write_complete = 1;
1225                 wake_up_interruptible(&priv->wait_command_queue);
1226         }
1227
1228         if (inta & ~handled) {
1229                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1230                 priv->isr_stats.unhandled++;
1231         }
1232
1233         if (inta & ~(priv->inta_mask)) {
1234                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1235                          inta & ~priv->inta_mask);
1236         }
1237
1238
1239         /* Re-enable all interrupts */
1240         /* only Re-enable if diabled by irq */
1241         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1242                 iwl_enable_interrupts(priv);
1243
1244         spin_unlock_irqrestore(&priv->lock, flags);
1245
1246 }
1247
1248
1249 /******************************************************************************
1250  *
1251  * uCode download functions
1252  *
1253  ******************************************************************************/
1254
1255 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1256 {
1257         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1258         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1259         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1260         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1261         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1262         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1263 }
1264
1265 static void iwl_nic_start(struct iwl_priv *priv)
1266 {
1267         /* Remove all resets to allow NIC to operate */
1268         iwl_write32(priv, CSR_RESET, 0);
1269 }
1270
1271
1272 /**
1273  * iwl_read_ucode - Read uCode images from disk file.
1274  *
1275  * Copy into buffers for card to fetch via bus-mastering
1276  */
1277 static int iwl_read_ucode(struct iwl_priv *priv)
1278 {
1279         struct iwl_ucode_header *ucode;
1280         int ret = -EINVAL, index;
1281         const struct firmware *ucode_raw;
1282         const char *name_pre = priv->cfg->fw_name_pre;
1283         const unsigned int api_max = priv->cfg->ucode_api_max;
1284         const unsigned int api_min = priv->cfg->ucode_api_min;
1285         char buf[25];
1286         u8 *src;
1287         size_t len;
1288         u32 api_ver, build;
1289         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1290         u16 eeprom_ver;
1291
1292         /* Ask kernel firmware_class module to get the boot firmware off disk.
1293          * request_firmware() is synchronous, file is in memory on return. */
1294         for (index = api_max; index >= api_min; index--) {
1295                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1296                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1297                 if (ret < 0) {
1298                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1299                                   buf, ret);
1300                         if (ret == -ENOENT)
1301                                 continue;
1302                         else
1303                                 goto error;
1304                 } else {
1305                         if (index < api_max)
1306                                 IWL_ERR(priv, "Loaded firmware %s, "
1307                                         "which is deprecated. "
1308                                         "Please use API v%u instead.\n",
1309                                           buf, api_max);
1310
1311                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1312                                        buf, ucode_raw->size);
1313                         break;
1314                 }
1315         }
1316
1317         if (ret < 0)
1318                 goto error;
1319
1320         /* Make sure that we got at least the v1 header! */
1321         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1322                 IWL_ERR(priv, "File size way too small!\n");
1323                 ret = -EINVAL;
1324                 goto err_release;
1325         }
1326
1327         /* Data from ucode file:  header followed by uCode images */
1328         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1329
1330         priv->ucode_ver = le32_to_cpu(ucode->ver);
1331         api_ver = IWL_UCODE_API(priv->ucode_ver);
1332         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1333         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1334         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1335         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1336         init_data_size =
1337                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1338         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1339         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1340
1341         /* api_ver should match the api version forming part of the
1342          * firmware filename ... but we don't check for that and only rely
1343          * on the API version read from firmware header from here on forward */
1344
1345         if (api_ver < api_min || api_ver > api_max) {
1346                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1347                           "Driver supports v%u, firmware is v%u.\n",
1348                           api_max, api_ver);
1349                 priv->ucode_ver = 0;
1350                 ret = -EINVAL;
1351                 goto err_release;
1352         }
1353         if (api_ver != api_max)
1354                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1355                           "got v%u. New firmware can be obtained "
1356                           "from http://www.intellinuxwireless.org.\n",
1357                           api_max, api_ver);
1358
1359         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1360                IWL_UCODE_MAJOR(priv->ucode_ver),
1361                IWL_UCODE_MINOR(priv->ucode_ver),
1362                IWL_UCODE_API(priv->ucode_ver),
1363                IWL_UCODE_SERIAL(priv->ucode_ver));
1364
1365         if (build)
1366                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1367
1368         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1369         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1370                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1371                        ? "OTP" : "EEPROM", eeprom_ver);
1372
1373         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1374                        priv->ucode_ver);
1375         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1376                        inst_size);
1377         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1378                        data_size);
1379         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1380                        init_size);
1381         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1382                        init_data_size);
1383         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1384                        boot_size);
1385
1386         /* Verify size of file vs. image size info in file's header */
1387         if (ucode_raw->size !=
1388                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1389                 inst_size + data_size + init_size +
1390                 init_data_size + boot_size) {
1391
1392                 IWL_DEBUG_INFO(priv,
1393                         "uCode file size %d does not match expected size\n",
1394                         (int)ucode_raw->size);
1395                 ret = -EINVAL;
1396                 goto err_release;
1397         }
1398
1399         /* Verify that uCode images will fit in card's SRAM */
1400         if (inst_size > priv->hw_params.max_inst_size) {
1401                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1402                                inst_size);
1403                 ret = -EINVAL;
1404                 goto err_release;
1405         }
1406
1407         if (data_size > priv->hw_params.max_data_size) {
1408                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1409                                 data_size);
1410                 ret = -EINVAL;
1411                 goto err_release;
1412         }
1413         if (init_size > priv->hw_params.max_inst_size) {
1414                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1415                         init_size);
1416                 ret = -EINVAL;
1417                 goto err_release;
1418         }
1419         if (init_data_size > priv->hw_params.max_data_size) {
1420                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1421                       init_data_size);
1422                 ret = -EINVAL;
1423                 goto err_release;
1424         }
1425         if (boot_size > priv->hw_params.max_bsm_size) {
1426                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1427                         boot_size);
1428                 ret = -EINVAL;
1429                 goto err_release;
1430         }
1431
1432         /* Allocate ucode buffers for card's bus-master loading ... */
1433
1434         /* Runtime instructions and 2 copies of data:
1435          * 1) unmodified from disk
1436          * 2) backup cache for save/restore during power-downs */
1437         priv->ucode_code.len = inst_size;
1438         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1439
1440         priv->ucode_data.len = data_size;
1441         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1442
1443         priv->ucode_data_backup.len = data_size;
1444         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1445
1446         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1447             !priv->ucode_data_backup.v_addr)
1448                 goto err_pci_alloc;
1449
1450         /* Initialization instructions and data */
1451         if (init_size && init_data_size) {
1452                 priv->ucode_init.len = init_size;
1453                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1454
1455                 priv->ucode_init_data.len = init_data_size;
1456                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1457
1458                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1459                         goto err_pci_alloc;
1460         }
1461
1462         /* Bootstrap (instructions only, no data) */
1463         if (boot_size) {
1464                 priv->ucode_boot.len = boot_size;
1465                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1466
1467                 if (!priv->ucode_boot.v_addr)
1468                         goto err_pci_alloc;
1469         }
1470
1471         /* Copy images into buffers for card's bus-master reads ... */
1472
1473         /* Runtime instructions (first block of data in file) */
1474         len = inst_size;
1475         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1476         memcpy(priv->ucode_code.v_addr, src, len);
1477         src += len;
1478
1479         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1480                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1481
1482         /* Runtime data (2nd block)
1483          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1484         len = data_size;
1485         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1486         memcpy(priv->ucode_data.v_addr, src, len);
1487         memcpy(priv->ucode_data_backup.v_addr, src, len);
1488         src += len;
1489
1490         /* Initialization instructions (3rd block) */
1491         if (init_size) {
1492                 len = init_size;
1493                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1494                                 len);
1495                 memcpy(priv->ucode_init.v_addr, src, len);
1496                 src += len;
1497         }
1498
1499         /* Initialization data (4th block) */
1500         if (init_data_size) {
1501                 len = init_data_size;
1502                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1503                                len);
1504                 memcpy(priv->ucode_init_data.v_addr, src, len);
1505                 src += len;
1506         }
1507
1508         /* Bootstrap instructions (5th block) */
1509         len = boot_size;
1510         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1511         memcpy(priv->ucode_boot.v_addr, src, len);
1512
1513         /* We have our copies now, allow OS release its copies */
1514         release_firmware(ucode_raw);
1515         return 0;
1516
1517  err_pci_alloc:
1518         IWL_ERR(priv, "failed to allocate pci memory\n");
1519         ret = -ENOMEM;
1520         iwl_dealloc_ucode_pci(priv);
1521
1522  err_release:
1523         release_firmware(ucode_raw);
1524
1525  error:
1526         return ret;
1527 }
1528
1529 /**
1530  * iwl_alive_start - called after REPLY_ALIVE notification received
1531  *                   from protocol/runtime uCode (initialization uCode's
1532  *                   Alive gets handled by iwl_init_alive_start()).
1533  */
1534 static void iwl_alive_start(struct iwl_priv *priv)
1535 {
1536         int ret = 0;
1537
1538         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1539
1540         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1541                 /* We had an error bringing up the hardware, so take it
1542                  * all the way back down so we can try again */
1543                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1544                 goto restart;
1545         }
1546
1547         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1548          * This is a paranoid check, because we would not have gotten the
1549          * "runtime" alive if code weren't properly loaded.  */
1550         if (iwl_verify_ucode(priv)) {
1551                 /* Runtime instruction load was bad;
1552                  * take it all the way back down so we can try again */
1553                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1554                 goto restart;
1555         }
1556
1557         iwl_clear_stations_table(priv);
1558         ret = priv->cfg->ops->lib->alive_notify(priv);
1559         if (ret) {
1560                 IWL_WARN(priv,
1561                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1562                 goto restart;
1563         }
1564
1565         /* After the ALIVE response, we can send host commands to the uCode */
1566         set_bit(STATUS_ALIVE, &priv->status);
1567
1568         if (iwl_is_rfkill(priv))
1569                 return;
1570
1571         ieee80211_wake_queues(priv->hw);
1572
1573         priv->active_rate = priv->rates_mask;
1574         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1575
1576         if (iwl_is_associated(priv)) {
1577                 struct iwl_rxon_cmd *active_rxon =
1578                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1579                 /* apply any changes in staging */
1580                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1581                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1582         } else {
1583                 /* Initialize our rx_config data */
1584                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1585
1586                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1587                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1588
1589                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1590         }
1591
1592         /* Configure Bluetooth device coexistence support */
1593         iwl_send_bt_config(priv);
1594
1595         iwl_reset_run_time_calib(priv);
1596
1597         /* Configure the adapter for unassociated operation */
1598         iwlcore_commit_rxon(priv);
1599
1600         /* At this point, the NIC is initialized and operational */
1601         iwl_rf_kill_ct_config(priv);
1602
1603         iwl_leds_register(priv);
1604
1605         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1606         set_bit(STATUS_READY, &priv->status);
1607         wake_up_interruptible(&priv->wait_command_queue);
1608
1609         iwl_power_update_mode(priv, true);
1610
1611         /* reassociate for ADHOC mode */
1612         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1613                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1614                                                                 priv->vif);
1615                 if (beacon)
1616                         iwl_mac_beacon_update(priv->hw, beacon);
1617         }
1618
1619
1620         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1621                 iwl_set_mode(priv, priv->iw_mode);
1622
1623         return;
1624
1625  restart:
1626         queue_work(priv->workqueue, &priv->restart);
1627 }
1628
1629 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1630
1631 static void __iwl_down(struct iwl_priv *priv)
1632 {
1633         unsigned long flags;
1634         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1635
1636         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1637
1638         if (!exit_pending)
1639                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1640
1641         iwl_leds_unregister(priv);
1642
1643         iwl_clear_stations_table(priv);
1644
1645         /* Unblock any waiting calls */
1646         wake_up_interruptible_all(&priv->wait_command_queue);
1647
1648         /* Wipe out the EXIT_PENDING status bit if we are not actually
1649          * exiting the module */
1650         if (!exit_pending)
1651                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1652
1653         /* stop and reset the on-board processor */
1654         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1655
1656         /* tell the device to stop sending interrupts */
1657         spin_lock_irqsave(&priv->lock, flags);
1658         iwl_disable_interrupts(priv);
1659         spin_unlock_irqrestore(&priv->lock, flags);
1660         iwl_synchronize_irq(priv);
1661
1662         if (priv->mac80211_registered)
1663                 ieee80211_stop_queues(priv->hw);
1664
1665         /* If we have not previously called iwl_init() then
1666          * clear all bits but the RF Kill bit and return */
1667         if (!iwl_is_init(priv)) {
1668                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1669                                         STATUS_RF_KILL_HW |
1670                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1671                                         STATUS_GEO_CONFIGURED |
1672                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1673                                         STATUS_EXIT_PENDING;
1674                 goto exit;
1675         }
1676
1677         /* ...otherwise clear out all the status bits but the RF Kill
1678          * bit and continue taking the NIC down. */
1679         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1680                                 STATUS_RF_KILL_HW |
1681                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1682                                 STATUS_GEO_CONFIGURED |
1683                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1684                                 STATUS_FW_ERROR |
1685                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1686                                 STATUS_EXIT_PENDING;
1687
1688         /* device going down, Stop using ICT table */
1689         iwl_disable_ict(priv);
1690         spin_lock_irqsave(&priv->lock, flags);
1691         iwl_clear_bit(priv, CSR_GP_CNTRL,
1692                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1693         spin_unlock_irqrestore(&priv->lock, flags);
1694
1695         iwl_txq_ctx_stop(priv);
1696         iwl_rxq_stop(priv);
1697
1698         iwl_write_prph(priv, APMG_CLK_DIS_REG,
1699                                 APMG_CLK_VAL_DMA_CLK_RQT);
1700
1701         udelay(5);
1702
1703         /* FIXME: apm_ops.suspend(priv) */
1704         if (exit_pending)
1705                 priv->cfg->ops->lib->apm_ops.stop(priv);
1706         else
1707                 priv->cfg->ops->lib->apm_ops.reset(priv);
1708  exit:
1709         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1710
1711         if (priv->ibss_beacon)
1712                 dev_kfree_skb(priv->ibss_beacon);
1713         priv->ibss_beacon = NULL;
1714
1715         /* clear out any free frames */
1716         iwl_clear_free_frames(priv);
1717 }
1718
1719 static void iwl_down(struct iwl_priv *priv)
1720 {
1721         mutex_lock(&priv->mutex);
1722         __iwl_down(priv);
1723         mutex_unlock(&priv->mutex);
1724
1725         iwl_cancel_deferred_work(priv);
1726 }
1727
1728 #define HW_READY_TIMEOUT (50)
1729
1730 static int iwl_set_hw_ready(struct iwl_priv *priv)
1731 {
1732         int ret = 0;
1733
1734         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1735                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
1736
1737         /* See if we got it */
1738         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1739                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1740                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1741                                 HW_READY_TIMEOUT);
1742         if (ret != -ETIMEDOUT)
1743                 priv->hw_ready = true;
1744         else
1745                 priv->hw_ready = false;
1746
1747         IWL_DEBUG_INFO(priv, "hardware %s\n",
1748                       (priv->hw_ready == 1) ? "ready" : "not ready");
1749         return ret;
1750 }
1751
1752 static int iwl_prepare_card_hw(struct iwl_priv *priv)
1753 {
1754         int ret = 0;
1755
1756         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
1757
1758         ret = iwl_set_hw_ready(priv);
1759         if (priv->hw_ready)
1760                 return ret;
1761
1762         /* If HW is not ready, prepare the conditions to check again */
1763         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1764                         CSR_HW_IF_CONFIG_REG_PREPARE);
1765
1766         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1767                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
1768                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
1769
1770         /* HW should be ready by now, check again. */
1771         if (ret != -ETIMEDOUT)
1772                 iwl_set_hw_ready(priv);
1773
1774         return ret;
1775 }
1776
1777 #define MAX_HW_RESTARTS 5
1778
1779 static int __iwl_up(struct iwl_priv *priv)
1780 {
1781         int i;
1782         int ret;
1783
1784         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1785                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1786                 return -EIO;
1787         }
1788
1789         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1790                 IWL_ERR(priv, "ucode not available for device bringup\n");
1791                 return -EIO;
1792         }
1793
1794         iwl_prepare_card_hw(priv);
1795
1796         if (!priv->hw_ready) {
1797                 IWL_WARN(priv, "Exit HW not ready\n");
1798                 return -EIO;
1799         }
1800
1801         /* If platform's RF_KILL switch is NOT set to KILL */
1802         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1803                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1804         else
1805                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1806
1807         if (iwl_is_rfkill(priv)) {
1808                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
1809
1810                 iwl_enable_interrupts(priv);
1811                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
1812                 return 0;
1813         }
1814
1815         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1816
1817         ret = iwl_hw_nic_init(priv);
1818         if (ret) {
1819                 IWL_ERR(priv, "Unable to init nic\n");
1820                 return ret;
1821         }
1822
1823         /* make sure rfkill handshake bits are cleared */
1824         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1825         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1826                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1827
1828         /* clear (again), then enable host interrupts */
1829         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1830         iwl_enable_interrupts(priv);
1831
1832         /* really make sure rfkill handshake bits are cleared */
1833         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1834         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1835
1836         /* Copy original ucode data image from disk into backup cache.
1837          * This will be used to initialize the on-board processor's
1838          * data SRAM for a clean start when the runtime program first loads. */
1839         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1840                priv->ucode_data.len);
1841
1842         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1843
1844                 iwl_clear_stations_table(priv);
1845
1846                 /* load bootstrap state machine,
1847                  * load bootstrap program into processor's memory,
1848                  * prepare to load the "initialize" uCode */
1849                 ret = priv->cfg->ops->lib->load_ucode(priv);
1850
1851                 if (ret) {
1852                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1853                                 ret);
1854                         continue;
1855                 }
1856
1857                 /* start card; "initialize" will load runtime ucode */
1858                 iwl_nic_start(priv);
1859
1860                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1861
1862                 return 0;
1863         }
1864
1865         set_bit(STATUS_EXIT_PENDING, &priv->status);
1866         __iwl_down(priv);
1867         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1868
1869         /* tried to restart and config the device for as long as our
1870          * patience could withstand */
1871         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1872         return -EIO;
1873 }
1874
1875
1876 /*****************************************************************************
1877  *
1878  * Workqueue callbacks
1879  *
1880  *****************************************************************************/
1881
1882 static void iwl_bg_init_alive_start(struct work_struct *data)
1883 {
1884         struct iwl_priv *priv =
1885             container_of(data, struct iwl_priv, init_alive_start.work);
1886
1887         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1888                 return;
1889
1890         mutex_lock(&priv->mutex);
1891         priv->cfg->ops->lib->init_alive_start(priv);
1892         mutex_unlock(&priv->mutex);
1893 }
1894
1895 static void iwl_bg_alive_start(struct work_struct *data)
1896 {
1897         struct iwl_priv *priv =
1898             container_of(data, struct iwl_priv, alive_start.work);
1899
1900         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1901                 return;
1902
1903         /* enable dram interrupt */
1904         iwl_reset_ict(priv);
1905
1906         mutex_lock(&priv->mutex);
1907         iwl_alive_start(priv);
1908         mutex_unlock(&priv->mutex);
1909 }
1910
1911 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1912 {
1913         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1914                         run_time_calib_work);
1915
1916         mutex_lock(&priv->mutex);
1917
1918         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1919             test_bit(STATUS_SCANNING, &priv->status)) {
1920                 mutex_unlock(&priv->mutex);
1921                 return;
1922         }
1923
1924         if (priv->start_calib) {
1925                 iwl_chain_noise_calibration(priv, &priv->statistics);
1926
1927                 iwl_sensitivity_calibration(priv, &priv->statistics);
1928         }
1929
1930         mutex_unlock(&priv->mutex);
1931         return;
1932 }
1933
1934 static void iwl_bg_up(struct work_struct *data)
1935 {
1936         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1937
1938         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1939                 return;
1940
1941         mutex_lock(&priv->mutex);
1942         __iwl_up(priv);
1943         mutex_unlock(&priv->mutex);
1944 }
1945
1946 static void iwl_bg_restart(struct work_struct *data)
1947 {
1948         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1949
1950         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1951                 return;
1952
1953         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1954                 mutex_lock(&priv->mutex);
1955                 priv->vif = NULL;
1956                 priv->is_open = 0;
1957                 mutex_unlock(&priv->mutex);
1958                 iwl_down(priv);
1959                 ieee80211_restart_hw(priv->hw);
1960         } else {
1961                 iwl_down(priv);
1962                 queue_work(priv->workqueue, &priv->up);
1963         }
1964 }
1965
1966 static void iwl_bg_rx_replenish(struct work_struct *data)
1967 {
1968         struct iwl_priv *priv =
1969             container_of(data, struct iwl_priv, rx_replenish);
1970
1971         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1972                 return;
1973
1974         mutex_lock(&priv->mutex);
1975         iwl_rx_replenish(priv);
1976         mutex_unlock(&priv->mutex);
1977 }
1978
1979 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1980
1981 void iwl_post_associate(struct iwl_priv *priv)
1982 {
1983         struct ieee80211_conf *conf = NULL;
1984         int ret = 0;
1985         unsigned long flags;
1986
1987         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1988                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1989                 return;
1990         }
1991
1992         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1993                         priv->assoc_id, priv->active_rxon.bssid_addr);
1994
1995
1996         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1997                 return;
1998
1999
2000         if (!priv->vif || !priv->is_open)
2001                 return;
2002
2003         iwl_scan_cancel_timeout(priv, 200);
2004
2005         conf = ieee80211_get_hw_conf(priv->hw);
2006
2007         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2008         iwlcore_commit_rxon(priv);
2009
2010         iwl_setup_rxon_timing(priv);
2011         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2012                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2013         if (ret)
2014                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2015                             "Attempting to continue.\n");
2016
2017         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2018
2019         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2020
2021         if (priv->cfg->ops->hcmd->set_rxon_chain)
2022                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2023
2024         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2025
2026         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2027                         priv->assoc_id, priv->beacon_int);
2028
2029         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2030                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2031         else
2032                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2033
2034         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2035                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2036                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2037                 else
2038                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2039
2040                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2041                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2042
2043         }
2044
2045         iwlcore_commit_rxon(priv);
2046
2047         switch (priv->iw_mode) {
2048         case NL80211_IFTYPE_STATION:
2049                 break;
2050
2051         case NL80211_IFTYPE_ADHOC:
2052
2053                 /* assume default assoc id */
2054                 priv->assoc_id = 1;
2055
2056                 iwl_rxon_add_station(priv, priv->bssid, 0);
2057                 iwl_send_beacon_cmd(priv);
2058
2059                 break;
2060
2061         default:
2062                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2063                           __func__, priv->iw_mode);
2064                 break;
2065         }
2066
2067         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2068                 priv->assoc_station_added = 1;
2069
2070         spin_lock_irqsave(&priv->lock, flags);
2071         iwl_activate_qos(priv, 0);
2072         spin_unlock_irqrestore(&priv->lock, flags);
2073
2074         /* the chain noise calibration will enabled PM upon completion
2075          * If chain noise has already been run, then we need to enable
2076          * power management here */
2077         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2078                 iwl_power_update_mode(priv, false);
2079
2080         /* Enable Rx differential gain and sensitivity calibrations */
2081         iwl_chain_noise_reset(priv);
2082         priv->start_calib = 1;
2083
2084 }
2085
2086 /*****************************************************************************
2087  *
2088  * mac80211 entry point functions
2089  *
2090  *****************************************************************************/
2091
2092 #define UCODE_READY_TIMEOUT     (4 * HZ)
2093
2094 static int iwl_mac_start(struct ieee80211_hw *hw)
2095 {
2096         struct iwl_priv *priv = hw->priv;
2097         int ret;
2098
2099         IWL_DEBUG_MAC80211(priv, "enter\n");
2100
2101         /* we should be verifying the device is ready to be opened */
2102         mutex_lock(&priv->mutex);
2103
2104         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2105          * ucode filename and max sizes are card-specific. */
2106
2107         if (!priv->ucode_code.len) {
2108                 ret = iwl_read_ucode(priv);
2109                 if (ret) {
2110                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2111                         mutex_unlock(&priv->mutex);
2112                         return ret;
2113                 }
2114         }
2115
2116         ret = __iwl_up(priv);
2117
2118         mutex_unlock(&priv->mutex);
2119
2120         if (ret)
2121                 return ret;
2122
2123         if (iwl_is_rfkill(priv))
2124                 goto out;
2125
2126         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2127
2128         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2129          * mac80211 will not be run successfully. */
2130         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2131                         test_bit(STATUS_READY, &priv->status),
2132                         UCODE_READY_TIMEOUT);
2133         if (!ret) {
2134                 if (!test_bit(STATUS_READY, &priv->status)) {
2135                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2136                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2137                         return -ETIMEDOUT;
2138                 }
2139         }
2140
2141 out:
2142         priv->is_open = 1;
2143         IWL_DEBUG_MAC80211(priv, "leave\n");
2144         return 0;
2145 }
2146
2147 static void iwl_mac_stop(struct ieee80211_hw *hw)
2148 {
2149         struct iwl_priv *priv = hw->priv;
2150
2151         IWL_DEBUG_MAC80211(priv, "enter\n");
2152
2153         if (!priv->is_open)
2154                 return;
2155
2156         priv->is_open = 0;
2157
2158         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2159                 /* stop mac, cancel any scan request and clear
2160                  * RXON_FILTER_ASSOC_MSK BIT
2161                  */
2162                 mutex_lock(&priv->mutex);
2163                 iwl_scan_cancel_timeout(priv, 100);
2164                 mutex_unlock(&priv->mutex);
2165         }
2166
2167         iwl_down(priv);
2168
2169         flush_workqueue(priv->workqueue);
2170
2171         /* enable interrupts again in order to receive rfkill changes */
2172         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2173         iwl_enable_interrupts(priv);
2174
2175         IWL_DEBUG_MAC80211(priv, "leave\n");
2176 }
2177
2178 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2179 {
2180         struct iwl_priv *priv = hw->priv;
2181
2182         IWL_DEBUG_MACDUMP(priv, "enter\n");
2183
2184         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2185                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2186
2187         if (iwl_tx_skb(priv, skb))
2188                 dev_kfree_skb_any(skb);
2189
2190         IWL_DEBUG_MACDUMP(priv, "leave\n");
2191         return NETDEV_TX_OK;
2192 }
2193
2194 void iwl_config_ap(struct iwl_priv *priv)
2195 {
2196         int ret = 0;
2197         unsigned long flags;
2198
2199         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2200                 return;
2201
2202         /* The following should be done only at AP bring up */
2203         if (!iwl_is_associated(priv)) {
2204
2205                 /* RXON - unassoc (to set timing command) */
2206                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2207                 iwlcore_commit_rxon(priv);
2208
2209                 /* RXON Timing */
2210                 iwl_setup_rxon_timing(priv);
2211                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2212                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2213                 if (ret)
2214                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2215                                         "Attempting to continue.\n");
2216
2217                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2218                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2219
2220                 /* FIXME: what should be the assoc_id for AP? */
2221                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2222                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2223                         priv->staging_rxon.flags |=
2224                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2225                 else
2226                         priv->staging_rxon.flags &=
2227                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2228
2229                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2230                         if (priv->assoc_capability &
2231                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2232                                 priv->staging_rxon.flags |=
2233                                         RXON_FLG_SHORT_SLOT_MSK;
2234                         else
2235                                 priv->staging_rxon.flags &=
2236                                         ~RXON_FLG_SHORT_SLOT_MSK;
2237
2238                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2239                                 priv->staging_rxon.flags &=
2240                                         ~RXON_FLG_SHORT_SLOT_MSK;
2241                 }
2242                 /* restore RXON assoc */
2243                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2244                 iwlcore_commit_rxon(priv);
2245                 spin_lock_irqsave(&priv->lock, flags);
2246                 iwl_activate_qos(priv, 1);
2247                 spin_unlock_irqrestore(&priv->lock, flags);
2248                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2249         }
2250         iwl_send_beacon_cmd(priv);
2251
2252         /* FIXME - we need to add code here to detect a totally new
2253          * configuration, reset the AP, unassoc, rxon timing, assoc,
2254          * clear sta table, add BCAST sta... */
2255 }
2256
2257 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2258                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2259                         u32 iv32, u16 *phase1key)
2260 {
2261
2262         struct iwl_priv *priv = hw->priv;
2263         IWL_DEBUG_MAC80211(priv, "enter\n");
2264
2265         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2266
2267         IWL_DEBUG_MAC80211(priv, "leave\n");
2268 }
2269
2270 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2271                            struct ieee80211_vif *vif,
2272                            struct ieee80211_sta *sta,
2273                            struct ieee80211_key_conf *key)
2274 {
2275         struct iwl_priv *priv = hw->priv;
2276         const u8 *addr;
2277         int ret;
2278         u8 sta_id;
2279         bool is_default_wep_key = false;
2280
2281         IWL_DEBUG_MAC80211(priv, "enter\n");
2282
2283         if (priv->cfg->mod_params->sw_crypto) {
2284                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2285                 return -EOPNOTSUPP;
2286         }
2287         addr = sta ? sta->addr : iwl_bcast_addr;
2288         sta_id = iwl_find_station(priv, addr);
2289         if (sta_id == IWL_INVALID_STATION) {
2290                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2291                                    addr);
2292                 return -EINVAL;
2293
2294         }
2295
2296         mutex_lock(&priv->mutex);
2297         iwl_scan_cancel_timeout(priv, 100);
2298         mutex_unlock(&priv->mutex);
2299
2300         /* If we are getting WEP group key and we didn't receive any key mapping
2301          * so far, we are in legacy wep mode (group key only), otherwise we are
2302          * in 1X mode.
2303          * In legacy wep mode, we use another host command to the uCode */
2304         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2305                 priv->iw_mode != NL80211_IFTYPE_AP) {
2306                 if (cmd == SET_KEY)
2307                         is_default_wep_key = !priv->key_mapping_key;
2308                 else
2309                         is_default_wep_key =
2310                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2311         }
2312
2313         switch (cmd) {
2314         case SET_KEY:
2315                 if (is_default_wep_key)
2316                         ret = iwl_set_default_wep_key(priv, key);
2317                 else
2318                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2319
2320                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2321                 break;
2322         case DISABLE_KEY:
2323                 if (is_default_wep_key)
2324                         ret = iwl_remove_default_wep_key(priv, key);
2325                 else
2326                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2327
2328                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2329                 break;
2330         default:
2331                 ret = -EINVAL;
2332         }
2333
2334         IWL_DEBUG_MAC80211(priv, "leave\n");
2335
2336         return ret;
2337 }
2338
2339 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2340                              enum ieee80211_ampdu_mlme_action action,
2341                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2342 {
2343         struct iwl_priv *priv = hw->priv;
2344         int ret;
2345
2346         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2347                      sta->addr, tid);
2348
2349         if (!(priv->cfg->sku & IWL_SKU_N))
2350                 return -EACCES;
2351
2352         switch (action) {
2353         case IEEE80211_AMPDU_RX_START:
2354                 IWL_DEBUG_HT(priv, "start Rx\n");
2355                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2356         case IEEE80211_AMPDU_RX_STOP:
2357                 IWL_DEBUG_HT(priv, "stop Rx\n");
2358                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2359                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2360                         return 0;
2361                 else
2362                         return ret;
2363         case IEEE80211_AMPDU_TX_START:
2364                 IWL_DEBUG_HT(priv, "start Tx\n");
2365                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2366         case IEEE80211_AMPDU_TX_STOP:
2367                 IWL_DEBUG_HT(priv, "stop Tx\n");
2368                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2369                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2370                         return 0;
2371                 else
2372                         return ret;
2373         default:
2374                 IWL_DEBUG_HT(priv, "unknown\n");
2375                 return -EINVAL;
2376                 break;
2377         }
2378         return 0;
2379 }
2380
2381 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2382                              struct ieee80211_low_level_stats *stats)
2383 {
2384         struct iwl_priv *priv = hw->priv;
2385
2386         priv = hw->priv;
2387         IWL_DEBUG_MAC80211(priv, "enter\n");
2388         IWL_DEBUG_MAC80211(priv, "leave\n");
2389
2390         return 0;
2391 }
2392
2393 /*****************************************************************************
2394  *
2395  * sysfs attributes
2396  *
2397  *****************************************************************************/
2398
2399 #ifdef CONFIG_IWLWIFI_DEBUG
2400
2401 /*
2402  * The following adds a new attribute to the sysfs representation
2403  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2404  * used for controlling the debug level.
2405  *
2406  * See the level definitions in iwl for details.
2407  *
2408  * The debug_level being managed using sysfs below is a per device debug
2409  * level that is used instead of the global debug level if it (the per
2410  * device debug level) is set.
2411  */
2412 static ssize_t show_debug_level(struct device *d,
2413                                 struct device_attribute *attr, char *buf)
2414 {
2415         struct iwl_priv *priv = dev_get_drvdata(d);
2416         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
2417 }
2418 static ssize_t store_debug_level(struct device *d,
2419                                 struct device_attribute *attr,
2420                                  const char *buf, size_t count)
2421 {
2422         struct iwl_priv *priv = dev_get_drvdata(d);
2423         unsigned long val;
2424         int ret;
2425
2426         ret = strict_strtoul(buf, 0, &val);
2427         if (ret)
2428                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2429         else {
2430                 priv->debug_level = val;
2431                 if (iwl_alloc_traffic_mem(priv))
2432                         IWL_ERR(priv,
2433                                 "Not enough memory to generate traffic log\n");
2434         }
2435         return strnlen(buf, count);
2436 }
2437
2438 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2439                         show_debug_level, store_debug_level);
2440
2441
2442 #endif /* CONFIG_IWLWIFI_DEBUG */
2443
2444
2445 static ssize_t show_temperature(struct device *d,
2446                                 struct device_attribute *attr, char *buf)
2447 {
2448         struct iwl_priv *priv = dev_get_drvdata(d);
2449
2450         if (!iwl_is_alive(priv))
2451                 return -EAGAIN;
2452
2453         return sprintf(buf, "%d\n", priv->temperature);
2454 }
2455
2456 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2457
2458 static ssize_t show_tx_power(struct device *d,
2459                              struct device_attribute *attr, char *buf)
2460 {
2461         struct iwl_priv *priv = dev_get_drvdata(d);
2462
2463         if (!iwl_is_ready_rf(priv))
2464                 return sprintf(buf, "off\n");
2465         else
2466                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2467 }
2468
2469 static ssize_t store_tx_power(struct device *d,
2470                               struct device_attribute *attr,
2471                               const char *buf, size_t count)
2472 {
2473         struct iwl_priv *priv = dev_get_drvdata(d);
2474         unsigned long val;
2475         int ret;
2476
2477         ret = strict_strtoul(buf, 10, &val);
2478         if (ret)
2479                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2480         else {
2481                 ret = iwl_set_tx_power(priv, val, false);
2482                 if (ret)
2483                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
2484                                 ret);
2485                 else
2486                         ret = count;
2487         }
2488         return ret;
2489 }
2490
2491 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2492
2493 static ssize_t show_flags(struct device *d,
2494                           struct device_attribute *attr, char *buf)
2495 {
2496         struct iwl_priv *priv = dev_get_drvdata(d);
2497
2498         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2499 }
2500
2501 static ssize_t store_flags(struct device *d,
2502                            struct device_attribute *attr,
2503                            const char *buf, size_t count)
2504 {
2505         struct iwl_priv *priv = dev_get_drvdata(d);
2506         unsigned long val;
2507         u32 flags;
2508         int ret = strict_strtoul(buf, 0, &val);
2509         if (ret)
2510                 return ret;
2511         flags = (u32)val;
2512
2513         mutex_lock(&priv->mutex);
2514         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2515                 /* Cancel any currently running scans... */
2516                 if (iwl_scan_cancel_timeout(priv, 100))
2517                         IWL_WARN(priv, "Could not cancel scan.\n");
2518                 else {
2519                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2520                         priv->staging_rxon.flags = cpu_to_le32(flags);
2521                         iwlcore_commit_rxon(priv);
2522                 }
2523         }
2524         mutex_unlock(&priv->mutex);
2525
2526         return count;
2527 }
2528
2529 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2530
2531 static ssize_t show_filter_flags(struct device *d,
2532                                  struct device_attribute *attr, char *buf)
2533 {
2534         struct iwl_priv *priv = dev_get_drvdata(d);
2535
2536         return sprintf(buf, "0x%04X\n",
2537                 le32_to_cpu(priv->active_rxon.filter_flags));
2538 }
2539
2540 static ssize_t store_filter_flags(struct device *d,
2541                                   struct device_attribute *attr,
2542                                   const char *buf, size_t count)
2543 {
2544         struct iwl_priv *priv = dev_get_drvdata(d);
2545         unsigned long val;
2546         u32 filter_flags;
2547         int ret = strict_strtoul(buf, 0, &val);
2548         if (ret)
2549                 return ret;
2550         filter_flags = (u32)val;
2551
2552         mutex_lock(&priv->mutex);
2553         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2554                 /* Cancel any currently running scans... */
2555                 if (iwl_scan_cancel_timeout(priv, 100))
2556                         IWL_WARN(priv, "Could not cancel scan.\n");
2557                 else {
2558                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2559                                        "0x%04X\n", filter_flags);
2560                         priv->staging_rxon.filter_flags =
2561                                 cpu_to_le32(filter_flags);
2562                         iwlcore_commit_rxon(priv);
2563                 }
2564         }
2565         mutex_unlock(&priv->mutex);
2566
2567         return count;
2568 }
2569
2570 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2571                    store_filter_flags);
2572
2573
2574 static ssize_t show_statistics(struct device *d,
2575                                struct device_attribute *attr, char *buf)
2576 {
2577         struct iwl_priv *priv = dev_get_drvdata(d);
2578         u32 size = sizeof(struct iwl_notif_statistics);
2579         u32 len = 0, ofs = 0;
2580         u8 *data = (u8 *)&priv->statistics;
2581         int rc = 0;
2582
2583         if (!iwl_is_alive(priv))
2584                 return -EAGAIN;
2585
2586         mutex_lock(&priv->mutex);
2587         rc = iwl_send_statistics_request(priv, 0);
2588         mutex_unlock(&priv->mutex);
2589
2590         if (rc) {
2591                 len = sprintf(buf,
2592                               "Error sending statistics request: 0x%08X\n", rc);
2593                 return len;
2594         }
2595
2596         while (size && (PAGE_SIZE - len)) {
2597                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2598                                    PAGE_SIZE - len, 1);
2599                 len = strlen(buf);
2600                 if (PAGE_SIZE - len)
2601                         buf[len++] = '\n';
2602
2603                 ofs += 16;
2604                 size -= min(size, 16U);
2605         }
2606
2607         return len;
2608 }
2609
2610 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2611
2612
2613 /*****************************************************************************
2614  *
2615  * driver setup and teardown
2616  *
2617  *****************************************************************************/
2618
2619 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2620 {
2621         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2622
2623         init_waitqueue_head(&priv->wait_command_queue);
2624
2625         INIT_WORK(&priv->up, iwl_bg_up);
2626         INIT_WORK(&priv->restart, iwl_bg_restart);
2627         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2628         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2629         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2630         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2631         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2632
2633         iwl_setup_scan_deferred_work(priv);
2634
2635         if (priv->cfg->ops->lib->setup_deferred_work)
2636                 priv->cfg->ops->lib->setup_deferred_work(priv);
2637
2638         init_timer(&priv->statistics_periodic);
2639         priv->statistics_periodic.data = (unsigned long)priv;
2640         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2641
2642         if (!priv->cfg->use_isr_legacy)
2643                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2644                         iwl_irq_tasklet, (unsigned long)priv);
2645         else
2646                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2647                         iwl_irq_tasklet_legacy, (unsigned long)priv);
2648 }
2649
2650 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2651 {
2652         if (priv->cfg->ops->lib->cancel_deferred_work)
2653                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2654
2655         cancel_delayed_work_sync(&priv->init_alive_start);
2656         cancel_delayed_work(&priv->scan_check);
2657         cancel_delayed_work(&priv->alive_start);
2658         cancel_work_sync(&priv->beacon_update);
2659         del_timer_sync(&priv->statistics_periodic);
2660 }
2661
2662 static struct attribute *iwl_sysfs_entries[] = {
2663         &dev_attr_flags.attr,
2664         &dev_attr_filter_flags.attr,
2665         &dev_attr_statistics.attr,
2666         &dev_attr_temperature.attr,
2667         &dev_attr_tx_power.attr,
2668 #ifdef CONFIG_IWLWIFI_DEBUG
2669         &dev_attr_debug_level.attr,
2670 #endif
2671         NULL
2672 };
2673
2674 static struct attribute_group iwl_attribute_group = {
2675         .name = NULL,           /* put in device directory */
2676         .attrs = iwl_sysfs_entries,
2677 };
2678
2679 static struct ieee80211_ops iwl_hw_ops = {
2680         .tx = iwl_mac_tx,
2681         .start = iwl_mac_start,
2682         .stop = iwl_mac_stop,
2683         .add_interface = iwl_mac_add_interface,
2684         .remove_interface = iwl_mac_remove_interface,
2685         .config = iwl_mac_config,
2686         .configure_filter = iwl_configure_filter,
2687         .set_key = iwl_mac_set_key,
2688         .update_tkip_key = iwl_mac_update_tkip_key,
2689         .get_stats = iwl_mac_get_stats,
2690         .get_tx_stats = iwl_mac_get_tx_stats,
2691         .conf_tx = iwl_mac_conf_tx,
2692         .reset_tsf = iwl_mac_reset_tsf,
2693         .bss_info_changed = iwl_bss_info_changed,
2694         .ampdu_action = iwl_mac_ampdu_action,
2695         .hw_scan = iwl_mac_hw_scan
2696 };
2697
2698 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2699 {
2700         int err = 0;
2701         struct iwl_priv *priv;
2702         struct ieee80211_hw *hw;
2703         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
2704         unsigned long flags;
2705         u16 pci_cmd;
2706
2707         /************************
2708          * 1. Allocating HW data
2709          ************************/
2710
2711         /* Disabling hardware scan means that mac80211 will perform scans
2712          * "the hard way", rather than using device's scan. */
2713         if (cfg->mod_params->disable_hw_scan) {
2714                 if (iwl_debug_level & IWL_DL_INFO)
2715                         dev_printk(KERN_DEBUG, &(pdev->dev),
2716                                    "Disabling hw_scan\n");
2717                 iwl_hw_ops.hw_scan = NULL;
2718         }
2719
2720         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
2721         if (!hw) {
2722                 err = -ENOMEM;
2723                 goto out;
2724         }
2725         priv = hw->priv;
2726         /* At this point both hw and priv are allocated. */
2727
2728         SET_IEEE80211_DEV(hw, &pdev->dev);
2729
2730         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
2731         priv->cfg = cfg;
2732         priv->pci_dev = pdev;
2733         priv->inta_mask = CSR_INI_SET_MASK;
2734
2735 #ifdef CONFIG_IWLWIFI_DEBUG
2736         atomic_set(&priv->restrict_refcnt, 0);
2737 #endif
2738         if (iwl_alloc_traffic_mem(priv))
2739                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
2740
2741         /**************************
2742          * 2. Initializing PCI bus
2743          **************************/
2744         if (pci_enable_device(pdev)) {
2745                 err = -ENODEV;
2746                 goto out_ieee80211_free_hw;
2747         }
2748
2749         pci_set_master(pdev);
2750
2751         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2752         if (!err)
2753                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2754         if (err) {
2755                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2756                 if (!err)
2757                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2758                 /* both attempts failed: */
2759                 if (err) {
2760                         IWL_WARN(priv, "No suitable DMA available.\n");
2761                         goto out_pci_disable_device;
2762                 }
2763         }
2764
2765         err = pci_request_regions(pdev, DRV_NAME);
2766         if (err)
2767                 goto out_pci_disable_device;
2768
2769         pci_set_drvdata(pdev, priv);
2770
2771
2772         /***********************
2773          * 3. Read REV register
2774          ***********************/
2775         priv->hw_base = pci_iomap(pdev, 0, 0);
2776         if (!priv->hw_base) {
2777                 err = -ENODEV;
2778                 goto out_pci_release_regions;
2779         }
2780
2781         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
2782                 (unsigned long long) pci_resource_len(pdev, 0));
2783         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
2784
2785         /* this spin lock will be used in apm_ops.init and EEPROM access
2786          * we should init now
2787          */
2788         spin_lock_init(&priv->reg_lock);
2789         iwl_hw_detect(priv);
2790         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
2791                 priv->cfg->name, priv->hw_rev);
2792
2793         /* We disable the RETRY_TIMEOUT register (0x41) to keep
2794          * PCI Tx retries from interfering with C3 CPU state */
2795         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2796
2797         iwl_prepare_card_hw(priv);
2798         if (!priv->hw_ready) {
2799                 IWL_WARN(priv, "Failed, HW not ready\n");
2800                 goto out_iounmap;
2801         }
2802
2803         /* amp init */
2804         err = priv->cfg->ops->lib->apm_ops.init(priv);
2805         if (err < 0) {
2806                 IWL_ERR(priv, "Failed to init APMG\n");
2807                 goto out_iounmap;
2808         }
2809         /*****************
2810          * 4. Read EEPROM
2811          *****************/
2812         /* Read the EEPROM */
2813         err = iwl_eeprom_init(priv);
2814         if (err) {
2815                 IWL_ERR(priv, "Unable to init EEPROM\n");
2816                 goto out_iounmap;
2817         }
2818         err = iwl_eeprom_check_version(priv);
2819         if (err)
2820                 goto out_free_eeprom;
2821
2822         /* extract MAC Address */
2823         iwl_eeprom_get_mac(priv, priv->mac_addr);
2824         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
2825         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2826
2827         /************************
2828          * 5. Setup HW constants
2829          ************************/
2830         if (iwl_set_hw_params(priv)) {
2831                 IWL_ERR(priv, "failed to set hw parameters\n");
2832                 goto out_free_eeprom;
2833         }
2834
2835         /*******************
2836          * 6. Setup priv
2837          *******************/
2838
2839         err = iwl_init_drv(priv);
2840         if (err)
2841                 goto out_free_eeprom;
2842         /* At this point both hw and priv are initialized. */
2843
2844         /********************
2845          * 7. Setup services
2846          ********************/
2847         spin_lock_irqsave(&priv->lock, flags);
2848         iwl_disable_interrupts(priv);
2849         spin_unlock_irqrestore(&priv->lock, flags);
2850
2851         pci_enable_msi(priv->pci_dev);
2852
2853         iwl_alloc_isr_ict(priv);
2854         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
2855                           IRQF_SHARED, DRV_NAME, priv);
2856         if (err) {
2857                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
2858                 goto out_disable_msi;
2859         }
2860         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
2861         if (err) {
2862                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
2863                 goto out_free_irq;
2864         }
2865
2866         iwl_setup_deferred_work(priv);
2867         iwl_setup_rx_handlers(priv);
2868
2869         /**********************************
2870          * 8. Setup and register mac80211
2871          **********************************/
2872
2873         /* enable interrupts if needed: hw bug w/a */
2874         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2875         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2876                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2877                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2878         }
2879
2880         iwl_enable_interrupts(priv);
2881
2882         err = iwl_setup_mac(priv);
2883         if (err)
2884                 goto out_remove_sysfs;
2885
2886         err = iwl_dbgfs_register(priv, DRV_NAME);
2887         if (err)
2888                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
2889
2890         /* If platform's RF_KILL switch is NOT set to KILL */
2891         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2892                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2893         else
2894                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2895
2896         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2897                 test_bit(STATUS_RF_KILL_HW, &priv->status));
2898
2899         iwl_power_initialize(priv);
2900         iwl_tt_initialize(priv);
2901         return 0;
2902
2903  out_remove_sysfs:
2904         destroy_workqueue(priv->workqueue);
2905         priv->workqueue = NULL;
2906         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
2907  out_free_irq:
2908         free_irq(priv->pci_dev->irq, priv);
2909         iwl_free_isr_ict(priv);
2910  out_disable_msi:
2911         pci_disable_msi(priv->pci_dev);
2912         iwl_uninit_drv(priv);
2913  out_free_eeprom:
2914         iwl_eeprom_free(priv);
2915  out_iounmap:
2916         pci_iounmap(pdev, priv->hw_base);
2917  out_pci_release_regions:
2918         pci_set_drvdata(pdev, NULL);
2919         pci_release_regions(pdev);
2920  out_pci_disable_device:
2921         pci_disable_device(pdev);
2922  out_ieee80211_free_hw:
2923         ieee80211_free_hw(priv->hw);
2924         iwl_free_traffic_mem(priv);
2925  out:
2926         return err;
2927 }
2928
2929 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
2930 {
2931         struct iwl_priv *priv = pci_get_drvdata(pdev);
2932         unsigned long flags;
2933
2934         if (!priv)
2935                 return;
2936
2937         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
2938
2939         iwl_dbgfs_unregister(priv);
2940         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
2941
2942         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
2943          * to be called and iwl_down since we are removing the device
2944          * we need to set STATUS_EXIT_PENDING bit.
2945          */
2946         set_bit(STATUS_EXIT_PENDING, &priv->status);
2947         if (priv->mac80211_registered) {
2948                 ieee80211_unregister_hw(priv->hw);
2949                 priv->mac80211_registered = 0;
2950         } else {
2951                 iwl_down(priv);
2952         }
2953
2954         iwl_tt_exit(priv);
2955
2956         /* make sure we flush any pending irq or
2957          * tasklet for the driver
2958          */
2959         spin_lock_irqsave(&priv->lock, flags);
2960         iwl_disable_interrupts(priv);
2961         spin_unlock_irqrestore(&priv->lock, flags);
2962
2963         iwl_synchronize_irq(priv);
2964
2965         iwl_dealloc_ucode_pci(priv);
2966
2967         if (priv->rxq.bd)
2968                 iwl_rx_queue_free(priv, &priv->rxq);
2969         iwl_hw_txq_ctx_free(priv);
2970
2971         iwl_clear_stations_table(priv);
2972         iwl_eeprom_free(priv);
2973
2974
2975         /*netif_stop_queue(dev); */
2976         flush_workqueue(priv->workqueue);
2977
2978         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
2979          * priv->workqueue... so we can't take down the workqueue
2980          * until now... */
2981         destroy_workqueue(priv->workqueue);
2982         priv->workqueue = NULL;
2983         iwl_free_traffic_mem(priv);
2984
2985         free_irq(priv->pci_dev->irq, priv);
2986         pci_disable_msi(priv->pci_dev);
2987         pci_iounmap(pdev, priv->hw_base);
2988         pci_release_regions(pdev);
2989         pci_disable_device(pdev);
2990         pci_set_drvdata(pdev, NULL);
2991
2992         iwl_uninit_drv(priv);
2993
2994         iwl_free_isr_ict(priv);
2995
2996         if (priv->ibss_beacon)
2997                 dev_kfree_skb(priv->ibss_beacon);
2998
2999         ieee80211_free_hw(priv->hw);
3000 }
3001
3002
3003 /*****************************************************************************
3004  *
3005  * driver and module entry point
3006  *
3007  *****************************************************************************/
3008
3009 /* Hardware specific file defines the PCI IDs table for that hardware module */
3010 static struct pci_device_id iwl_hw_card_ids[] = {
3011 #ifdef CONFIG_IWL4965
3012         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3013         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3014 #endif /* CONFIG_IWL4965 */
3015 #ifdef CONFIG_IWL5000
3016         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3017         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3018         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3019         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3020         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3021         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3022         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3023         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3024         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3025         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3026 /* 5350 WiFi/WiMax */
3027         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3028         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3029         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3030 /* 5150 Wifi/WiMax */
3031         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3032         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3033 /* 6000/6050 Series */
3034         {IWL_PCI_DEVICE(0x008D, PCI_ANY_ID, iwl6000h_2agn_cfg)},
3035         {IWL_PCI_DEVICE(0x008E, PCI_ANY_ID, iwl6000h_2agn_cfg)},
3036         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3037         {IWL_PCI_DEVICE(0x422C, PCI_ANY_ID, iwl6000i_2agn_cfg)},
3038         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3039         {IWL_PCI_DEVICE(0x4239, PCI_ANY_ID, iwl6000i_2agn_cfg)},
3040         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3041         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3042         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3043         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3044 /* 1000 Series WiFi */
3045         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3046         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3047 #endif /* CONFIG_IWL5000 */
3048
3049         {0}
3050 };
3051 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3052
3053 static struct pci_driver iwl_driver = {
3054         .name = DRV_NAME,
3055         .id_table = iwl_hw_card_ids,
3056         .probe = iwl_pci_probe,
3057         .remove = __devexit_p(iwl_pci_remove),
3058 #ifdef CONFIG_PM
3059         .suspend = iwl_pci_suspend,
3060         .resume = iwl_pci_resume,
3061 #endif
3062 };
3063
3064 static int __init iwl_init(void)
3065 {
3066
3067         int ret;
3068         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3069         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3070
3071         ret = iwlagn_rate_control_register();
3072         if (ret) {
3073                 printk(KERN_ERR DRV_NAME
3074                        "Unable to register rate control algorithm: %d\n", ret);
3075                 return ret;
3076         }
3077
3078         ret = pci_register_driver(&iwl_driver);
3079         if (ret) {
3080                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3081                 goto error_register;
3082         }
3083
3084         return ret;
3085
3086 error_register:
3087         iwlagn_rate_control_unregister();
3088         return ret;
3089 }
3090
3091 static void __exit iwl_exit(void)
3092 {
3093         pci_unregister_driver(&iwl_driver);
3094         iwlagn_rate_control_unregister();
3095 }
3096
3097 module_exit(iwl_exit);
3098 module_init(iwl_init);
3099
3100 #ifdef CONFIG_IWLWIFI_DEBUG
3101 module_param_named(debug50, iwl_debug_level, uint, 0444);
3102 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3103 module_param_named(debug, iwl_debug_level, uint, 0644);
3104 MODULE_PARM_DESC(debug, "debug output mask");
3105 #endif
3106