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iwlwifi: don't use implicit priv in IWL_DEBUG
[deliverable/linux.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_IWLAGN_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 static 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->hw_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 if (!priv->error_recovering)
194 priv->start_calib = 0;
195
196 /* Add the broadcast address so we can send broadcast frames */
197 if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
198 IWL_INVALID_STATION) {
199 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
200 return -EIO;
201 }
202
203 /* If we have set the ASSOC_MSK and we are in BSS mode then
204 * add the IWL_AP_ID to the station rate table */
205 if (new_assoc) {
206 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
207 ret = iwl_rxon_add_station(priv,
208 priv->active_rxon.bssid_addr, 1);
209 if (ret == IWL_INVALID_STATION) {
210 IWL_ERR(priv,
211 "Error adding AP address for TX.\n");
212 return -EIO;
213 }
214 priv->assoc_station_added = 1;
215 if (priv->default_wep_key &&
216 iwl_send_static_wepkey_cmd(priv, 0))
217 IWL_ERR(priv,
218 "Could not send WEP static key.\n");
219 }
220
221 /* Apply the new configuration
222 * RXON assoc doesn't clear the station table in uCode,
223 */
224 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
225 sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
226 if (ret) {
227 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
228 return ret;
229 }
230 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
231 }
232
233 iwl_init_sensitivity(priv);
234
235 /* If we issue a new RXON command which required a tune then we must
236 * send a new TXPOWER command or we won't be able to Tx any frames */
237 ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
238 if (ret) {
239 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
240 return ret;
241 }
242
243 return 0;
244 }
245
246 void iwl_update_chain_flags(struct iwl_priv *priv)
247 {
248
249 iwl_set_rxon_chain(priv);
250 iwl_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->cmd[index]->meta, mapping),
446 pci_unmap_len(&txq->cmd[index]->meta, len),
447 PCI_DMA_TODEVICE);
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 ret;
507 unsigned long flags;
508 int txq_id = txq->q.id;
509
510 spin_lock_irqsave(&priv->lock, flags);
511 ret = iwl_grab_nic_access(priv);
512 if (ret) {
513 spin_unlock_irqrestore(&priv->lock, flags);
514 return ret;
515 }
516
517 /* Circular buffer (TFD queue in DRAM) physical base address */
518 iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
519 txq->q.dma_addr >> 8);
520
521 iwl_release_nic_access(priv);
522 spin_unlock_irqrestore(&priv->lock, flags);
523
524 return 0;
525 }
526
527
528 /******************************************************************************
529 *
530 * Misc. internal state and helper functions
531 *
532 ******************************************************************************/
533
534 static void iwl_ht_conf(struct iwl_priv *priv,
535 struct ieee80211_bss_conf *bss_conf)
536 {
537 struct ieee80211_sta_ht_cap *ht_conf;
538 struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
539 struct ieee80211_sta *sta;
540
541 IWL_DEBUG_MAC80211(priv, "enter: \n");
542
543 if (!iwl_conf->is_ht)
544 return;
545
546
547 /*
548 * It is totally wrong to base global information on something
549 * that is valid only when associated, alas, this driver works
550 * that way and I don't know how to fix it.
551 */
552
553 rcu_read_lock();
554 sta = ieee80211_find_sta(priv->hw, priv->bssid);
555 if (!sta) {
556 rcu_read_unlock();
557 return;
558 }
559 ht_conf = &sta->ht_cap;
560
561 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
562 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
563 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
564 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
565
566 iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
567 iwl_conf->max_amsdu_size =
568 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
569
570 iwl_conf->supported_chan_width =
571 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
572
573 /*
574 * XXX: The HT configuration needs to be moved into iwl_mac_config()
575 * to be done there correctly.
576 */
577
578 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
579 if (conf_is_ht40_minus(&priv->hw->conf))
580 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
581 else if (conf_is_ht40_plus(&priv->hw->conf))
582 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
583
584 /* If no above or below channel supplied disable FAT channel */
585 if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
586 iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
587 iwl_conf->supported_chan_width = 0;
588
589 iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
590
591 memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
592
593 iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
594 iwl_conf->ht_protection =
595 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
596 iwl_conf->non_GF_STA_present =
597 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
598
599 rcu_read_unlock();
600
601 IWL_DEBUG_MAC80211(priv, "leave\n");
602 }
603
604 /*
605 * QoS support
606 */
607 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
608 {
609 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
610 return;
611
612 priv->qos_data.def_qos_parm.qos_flags = 0;
613
614 if (priv->qos_data.qos_cap.q_AP.queue_request &&
615 !priv->qos_data.qos_cap.q_AP.txop_request)
616 priv->qos_data.def_qos_parm.qos_flags |=
617 QOS_PARAM_FLG_TXOP_TYPE_MSK;
618 if (priv->qos_data.qos_active)
619 priv->qos_data.def_qos_parm.qos_flags |=
620 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
621
622 if (priv->current_ht_config.is_ht)
623 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
624
625 if (force || iwl_is_associated(priv)) {
626 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
627 priv->qos_data.qos_active,
628 priv->qos_data.def_qos_parm.qos_flags);
629
630 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
631 sizeof(struct iwl_qosparam_cmd),
632 &priv->qos_data.def_qos_parm, NULL);
633 }
634 }
635
636 #define MAX_UCODE_BEACON_INTERVAL 4096
637
638 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
639 {
640 u16 new_val = 0;
641 u16 beacon_factor = 0;
642
643 beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
644 / MAX_UCODE_BEACON_INTERVAL;
645 new_val = beacon_val / beacon_factor;
646
647 return new_val;
648 }
649
650 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
651 {
652 u64 tsf;
653 s32 interval_tm, rem;
654 unsigned long flags;
655 struct ieee80211_conf *conf = NULL;
656 u16 beacon_int = 0;
657
658 conf = ieee80211_get_hw_conf(priv->hw);
659
660 spin_lock_irqsave(&priv->lock, flags);
661 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
662 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
663
664 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
665 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
666 priv->rxon_timing.atim_window = 0;
667 } else {
668 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
669
670 /* TODO: we need to get atim_window from upper stack
671 * for now we set to 0 */
672 priv->rxon_timing.atim_window = 0;
673 }
674
675 priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
676
677 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
678 interval_tm = beacon_int * 1024;
679 rem = do_div(tsf, interval_tm);
680 priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
681
682 spin_unlock_irqrestore(&priv->lock, flags);
683 IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
684 le16_to_cpu(priv->rxon_timing.beacon_interval),
685 le32_to_cpu(priv->rxon_timing.beacon_init_val),
686 le16_to_cpu(priv->rxon_timing.atim_window));
687 }
688
689 static int iwl_set_mode(struct iwl_priv *priv, int mode)
690 {
691 iwl_connection_init_rx_config(priv, mode);
692 iwl_set_rxon_chain(priv);
693 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
694
695 iwl_clear_stations_table(priv);
696
697 /* dont commit rxon if rf-kill is on*/
698 if (!iwl_is_ready_rf(priv))
699 return -EAGAIN;
700
701 cancel_delayed_work(&priv->scan_check);
702 if (iwl_scan_cancel_timeout(priv, 100)) {
703 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
704 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
705 return -EAGAIN;
706 }
707
708 iwl_commit_rxon(priv);
709
710 return 0;
711 }
712
713 /******************************************************************************
714 *
715 * Generic RX handler implementations
716 *
717 ******************************************************************************/
718 static void iwl_rx_reply_alive(struct iwl_priv *priv,
719 struct iwl_rx_mem_buffer *rxb)
720 {
721 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
722 struct iwl_alive_resp *palive;
723 struct delayed_work *pwork;
724
725 palive = &pkt->u.alive_frame;
726
727 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
728 "0x%01X 0x%01X\n",
729 palive->is_valid, palive->ver_type,
730 palive->ver_subtype);
731
732 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
733 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
734 memcpy(&priv->card_alive_init,
735 &pkt->u.alive_frame,
736 sizeof(struct iwl_init_alive_resp));
737 pwork = &priv->init_alive_start;
738 } else {
739 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
740 memcpy(&priv->card_alive, &pkt->u.alive_frame,
741 sizeof(struct iwl_alive_resp));
742 pwork = &priv->alive_start;
743 }
744
745 /* We delay the ALIVE response by 5ms to
746 * give the HW RF Kill time to activate... */
747 if (palive->is_valid == UCODE_VALID_OK)
748 queue_delayed_work(priv->workqueue, pwork,
749 msecs_to_jiffies(5));
750 else
751 IWL_WARN(priv, "uCode did not respond OK.\n");
752 }
753
754 static void iwl_rx_reply_error(struct iwl_priv *priv,
755 struct iwl_rx_mem_buffer *rxb)
756 {
757 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
758
759 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
760 "seq 0x%04X ser 0x%08X\n",
761 le32_to_cpu(pkt->u.err_resp.error_type),
762 get_cmd_string(pkt->u.err_resp.cmd_id),
763 pkt->u.err_resp.cmd_id,
764 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
765 le32_to_cpu(pkt->u.err_resp.error_info));
766 }
767
768 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
769 struct iwl_rx_mem_buffer *rxb)
770 {
771 #ifdef CONFIG_IWLWIFI_DEBUG
772 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
773 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
774 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
775 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
776 #endif
777 }
778
779 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
780 struct iwl_rx_mem_buffer *rxb)
781 {
782 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
783 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
784 "notification for %s:\n",
785 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
786 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
787 }
788
789 static void iwl_bg_beacon_update(struct work_struct *work)
790 {
791 struct iwl_priv *priv =
792 container_of(work, struct iwl_priv, beacon_update);
793 struct sk_buff *beacon;
794
795 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
796 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
797
798 if (!beacon) {
799 IWL_ERR(priv, "update beacon failed\n");
800 return;
801 }
802
803 mutex_lock(&priv->mutex);
804 /* new beacon skb is allocated every time; dispose previous.*/
805 if (priv->ibss_beacon)
806 dev_kfree_skb(priv->ibss_beacon);
807
808 priv->ibss_beacon = beacon;
809 mutex_unlock(&priv->mutex);
810
811 iwl_send_beacon_cmd(priv);
812 }
813
814 /**
815 * iwl_bg_statistics_periodic - Timer callback to queue statistics
816 *
817 * This callback is provided in order to send a statistics request.
818 *
819 * This timer function is continually reset to execute within
820 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
821 * was received. We need to ensure we receive the statistics in order
822 * to update the temperature used for calibrating the TXPOWER.
823 */
824 static void iwl_bg_statistics_periodic(unsigned long data)
825 {
826 struct iwl_priv *priv = (struct iwl_priv *)data;
827
828 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
829 return;
830
831 /* dont send host command if rf-kill is on */
832 if (!iwl_is_ready_rf(priv))
833 return;
834
835 iwl_send_statistics_request(priv, CMD_ASYNC);
836 }
837
838 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
839 struct iwl_rx_mem_buffer *rxb)
840 {
841 #ifdef CONFIG_IWLWIFI_DEBUG
842 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
843 struct iwl4965_beacon_notif *beacon =
844 (struct iwl4965_beacon_notif *)pkt->u.raw;
845 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
846
847 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
848 "tsf %d %d rate %d\n",
849 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
850 beacon->beacon_notify_hdr.failure_frame,
851 le32_to_cpu(beacon->ibss_mgr_status),
852 le32_to_cpu(beacon->high_tsf),
853 le32_to_cpu(beacon->low_tsf), rate);
854 #endif
855
856 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
857 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
858 queue_work(priv->workqueue, &priv->beacon_update);
859 }
860
861 /* Handle notification from uCode that card's power state is changing
862 * due to software, hardware, or critical temperature RFKILL */
863 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
864 struct iwl_rx_mem_buffer *rxb)
865 {
866 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
867 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
868 unsigned long status = priv->status;
869
870 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
871 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
872 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
873
874 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
875 RF_CARD_DISABLED)) {
876
877 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
878 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
879
880 if (!iwl_grab_nic_access(priv)) {
881 iwl_write_direct32(
882 priv, HBUS_TARG_MBX_C,
883 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
884
885 iwl_release_nic_access(priv);
886 }
887
888 if (!(flags & RXON_CARD_DISABLED)) {
889 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
890 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
891 if (!iwl_grab_nic_access(priv)) {
892 iwl_write_direct32(
893 priv, HBUS_TARG_MBX_C,
894 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
895
896 iwl_release_nic_access(priv);
897 }
898 }
899
900 if (flags & RF_CARD_DISABLED) {
901 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
902 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
903 iwl_read32(priv, CSR_UCODE_DRV_GP1);
904 if (!iwl_grab_nic_access(priv))
905 iwl_release_nic_access(priv);
906 }
907 }
908
909 if (flags & HW_CARD_DISABLED)
910 set_bit(STATUS_RF_KILL_HW, &priv->status);
911 else
912 clear_bit(STATUS_RF_KILL_HW, &priv->status);
913
914
915 if (flags & SW_CARD_DISABLED)
916 set_bit(STATUS_RF_KILL_SW, &priv->status);
917 else
918 clear_bit(STATUS_RF_KILL_SW, &priv->status);
919
920 if (!(flags & RXON_CARD_DISABLED))
921 iwl_scan_cancel(priv);
922
923 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
924 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
925 (test_bit(STATUS_RF_KILL_SW, &status) !=
926 test_bit(STATUS_RF_KILL_SW, &priv->status)))
927 queue_work(priv->workqueue, &priv->rf_kill);
928 else
929 wake_up_interruptible(&priv->wait_command_queue);
930 }
931
932 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
933 {
934 int ret;
935 unsigned long flags;
936
937 spin_lock_irqsave(&priv->lock, flags);
938 ret = iwl_grab_nic_access(priv);
939 if (ret)
940 goto err;
941
942 if (src == IWL_PWR_SRC_VAUX) {
943 u32 val;
944 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
945 &val);
946
947 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
948 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
949 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
950 ~APMG_PS_CTRL_MSK_PWR_SRC);
951 } else {
952 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
953 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
954 ~APMG_PS_CTRL_MSK_PWR_SRC);
955 }
956
957 iwl_release_nic_access(priv);
958 err:
959 spin_unlock_irqrestore(&priv->lock, flags);
960 return ret;
961 }
962
963 /**
964 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
965 *
966 * Setup the RX handlers for each of the reply types sent from the uCode
967 * to the host.
968 *
969 * This function chains into the hardware specific files for them to setup
970 * any hardware specific handlers as well.
971 */
972 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
973 {
974 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
975 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
976 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
977 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
978 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
979 iwl_rx_pm_debug_statistics_notif;
980 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
981
982 /*
983 * The same handler is used for both the REPLY to a discrete
984 * statistics request from the host as well as for the periodic
985 * statistics notifications (after received beacons) from the uCode.
986 */
987 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
988 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
989
990 iwl_setup_spectrum_handlers(priv);
991 iwl_setup_rx_scan_handlers(priv);
992
993 /* status change handler */
994 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
995
996 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
997 iwl_rx_missed_beacon_notif;
998 /* Rx handlers */
999 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1000 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1001 /* block ack */
1002 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1003 /* Set up hardware specific Rx handlers */
1004 priv->cfg->ops->lib->rx_handler_setup(priv);
1005 }
1006
1007 /**
1008 * iwl_rx_handle - Main entry function for receiving responses from uCode
1009 *
1010 * Uses the priv->rx_handlers callback function array to invoke
1011 * the appropriate handlers, including command responses,
1012 * frame-received notifications, and other notifications.
1013 */
1014 void iwl_rx_handle(struct iwl_priv *priv)
1015 {
1016 struct iwl_rx_mem_buffer *rxb;
1017 struct iwl_rx_packet *pkt;
1018 struct iwl_rx_queue *rxq = &priv->rxq;
1019 u32 r, i;
1020 int reclaim;
1021 unsigned long flags;
1022 u8 fill_rx = 0;
1023 u32 count = 8;
1024
1025 /* uCode's read index (stored in shared DRAM) indicates the last Rx
1026 * buffer that the driver may process (last buffer filled by ucode). */
1027 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1028 i = rxq->read;
1029
1030 /* Rx interrupt, but nothing sent from uCode */
1031 if (i == r)
1032 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1033
1034 if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1035 fill_rx = 1;
1036
1037 while (i != r) {
1038 rxb = rxq->queue[i];
1039
1040 /* If an RXB doesn't have a Rx queue slot associated with it,
1041 * then a bug has been introduced in the queue refilling
1042 * routines -- catch it here */
1043 BUG_ON(rxb == NULL);
1044
1045 rxq->queue[i] = NULL;
1046
1047 dma_sync_single_range_for_cpu(
1048 &priv->pci_dev->dev, rxb->real_dma_addr,
1049 rxb->aligned_dma_addr - rxb->real_dma_addr,
1050 priv->hw_params.rx_buf_size,
1051 PCI_DMA_FROMDEVICE);
1052 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1053
1054 /* Reclaim a command buffer only if this packet is a response
1055 * to a (driver-originated) command.
1056 * If the packet (e.g. Rx frame) originated from uCode,
1057 * there is no command buffer to reclaim.
1058 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1059 * but apparently a few don't get set; catch them here. */
1060 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1061 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1062 (pkt->hdr.cmd != REPLY_RX) &&
1063 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1064 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1065 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1066 (pkt->hdr.cmd != REPLY_TX);
1067
1068 /* Based on type of command response or notification,
1069 * handle those that need handling via function in
1070 * rx_handlers table. See iwl_setup_rx_handlers() */
1071 if (priv->rx_handlers[pkt->hdr.cmd]) {
1072 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1073 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1074 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1075 } else {
1076 /* No handling needed */
1077 IWL_DEBUG_RX(priv,
1078 "r %d i %d No handler needed for %s, 0x%02x\n",
1079 r, i, get_cmd_string(pkt->hdr.cmd),
1080 pkt->hdr.cmd);
1081 }
1082
1083 if (reclaim) {
1084 /* Invoke any callbacks, transfer the skb to caller, and
1085 * fire off the (possibly) blocking iwl_send_cmd()
1086 * as we reclaim the driver command queue */
1087 if (rxb && rxb->skb)
1088 iwl_tx_cmd_complete(priv, rxb);
1089 else
1090 IWL_WARN(priv, "Claim null rxb?\n");
1091 }
1092
1093 /* For now we just don't re-use anything. We can tweak this
1094 * later to try and re-use notification packets and SKBs that
1095 * fail to Rx correctly */
1096 if (rxb->skb != NULL) {
1097 priv->alloc_rxb_skb--;
1098 dev_kfree_skb_any(rxb->skb);
1099 rxb->skb = NULL;
1100 }
1101
1102 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1103 priv->hw_params.rx_buf_size + 256,
1104 PCI_DMA_FROMDEVICE);
1105 spin_lock_irqsave(&rxq->lock, flags);
1106 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1107 spin_unlock_irqrestore(&rxq->lock, flags);
1108 i = (i + 1) & RX_QUEUE_MASK;
1109 /* If there are a lot of unused frames,
1110 * restock the Rx queue so ucode wont assert. */
1111 if (fill_rx) {
1112 count++;
1113 if (count >= 8) {
1114 priv->rxq.read = i;
1115 iwl_rx_queue_restock(priv);
1116 count = 0;
1117 }
1118 }
1119 }
1120
1121 /* Backtrack one entry */
1122 priv->rxq.read = i;
1123 iwl_rx_queue_restock(priv);
1124 }
1125
1126 /* call this function to flush any scheduled tasklet */
1127 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1128 {
1129 /* wait to make sure we flush pending tasklet*/
1130 synchronize_irq(priv->pci_dev->irq);
1131 tasklet_kill(&priv->irq_tasklet);
1132 }
1133
1134 static void iwl_error_recovery(struct iwl_priv *priv)
1135 {
1136 unsigned long flags;
1137
1138 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1139 sizeof(priv->staging_rxon));
1140 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1141 iwl_commit_rxon(priv);
1142
1143 iwl_rxon_add_station(priv, priv->bssid, 1);
1144
1145 spin_lock_irqsave(&priv->lock, flags);
1146 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1147 priv->error_recovering = 0;
1148 spin_unlock_irqrestore(&priv->lock, flags);
1149 }
1150
1151 static void iwl_irq_tasklet(struct iwl_priv *priv)
1152 {
1153 u32 inta, handled = 0;
1154 u32 inta_fh;
1155 unsigned long flags;
1156 #ifdef CONFIG_IWLWIFI_DEBUG
1157 u32 inta_mask;
1158 #endif
1159
1160 spin_lock_irqsave(&priv->lock, flags);
1161
1162 /* Ack/clear/reset pending uCode interrupts.
1163 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1164 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1165 inta = iwl_read32(priv, CSR_INT);
1166 iwl_write32(priv, CSR_INT, inta);
1167
1168 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1169 * Any new interrupts that happen after this, either while we're
1170 * in this tasklet, or later, will show up in next ISR/tasklet. */
1171 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1172 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1173
1174 #ifdef CONFIG_IWLWIFI_DEBUG
1175 if (priv->debug_level & IWL_DL_ISR) {
1176 /* just for debug */
1177 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1178 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1179 inta, inta_mask, inta_fh);
1180 }
1181 #endif
1182
1183 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1184 * atomic, make sure that inta covers all the interrupts that
1185 * we've discovered, even if FH interrupt came in just after
1186 * reading CSR_INT. */
1187 if (inta_fh & CSR49_FH_INT_RX_MASK)
1188 inta |= CSR_INT_BIT_FH_RX;
1189 if (inta_fh & CSR49_FH_INT_TX_MASK)
1190 inta |= CSR_INT_BIT_FH_TX;
1191
1192 /* Now service all interrupt bits discovered above. */
1193 if (inta & CSR_INT_BIT_HW_ERR) {
1194 IWL_ERR(priv, "Microcode HW error detected. Restarting.\n");
1195
1196 /* Tell the device to stop sending interrupts */
1197 iwl_disable_interrupts(priv);
1198
1199 iwl_irq_handle_error(priv);
1200
1201 handled |= CSR_INT_BIT_HW_ERR;
1202
1203 spin_unlock_irqrestore(&priv->lock, flags);
1204
1205 return;
1206 }
1207
1208 #ifdef CONFIG_IWLWIFI_DEBUG
1209 if (priv->debug_level & (IWL_DL_ISR)) {
1210 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1211 if (inta & CSR_INT_BIT_SCD)
1212 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1213 "the frame/frames.\n");
1214
1215 /* Alive notification via Rx interrupt will do the real work */
1216 if (inta & CSR_INT_BIT_ALIVE)
1217 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1218 }
1219 #endif
1220 /* Safely ignore these bits for debug checks below */
1221 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1222
1223 /* HW RF KILL switch toggled */
1224 if (inta & CSR_INT_BIT_RF_KILL) {
1225 int hw_rf_kill = 0;
1226 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1227 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1228 hw_rf_kill = 1;
1229
1230 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1231 hw_rf_kill ? "disable radio" : "enable radio");
1232
1233 /* driver only loads ucode once setting the interface up.
1234 * the driver allows loading the ucode even if the radio
1235 * is killed. Hence update the killswitch state here. The
1236 * rfkill handler will care about restarting if needed.
1237 */
1238 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1239 if (hw_rf_kill)
1240 set_bit(STATUS_RF_KILL_HW, &priv->status);
1241 else
1242 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1243 queue_work(priv->workqueue, &priv->rf_kill);
1244 }
1245
1246 handled |= CSR_INT_BIT_RF_KILL;
1247 }
1248
1249 /* Chip got too hot and stopped itself */
1250 if (inta & CSR_INT_BIT_CT_KILL) {
1251 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1252 handled |= CSR_INT_BIT_CT_KILL;
1253 }
1254
1255 /* Error detected by uCode */
1256 if (inta & CSR_INT_BIT_SW_ERR) {
1257 IWL_ERR(priv, "Microcode SW error detected. "
1258 " Restarting 0x%X.\n", inta);
1259 iwl_irq_handle_error(priv);
1260 handled |= CSR_INT_BIT_SW_ERR;
1261 }
1262
1263 /* uCode wakes up after power-down sleep */
1264 if (inta & CSR_INT_BIT_WAKEUP) {
1265 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1266 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1267 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1268 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1269 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1270 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1271 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1272 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1273
1274 handled |= CSR_INT_BIT_WAKEUP;
1275 }
1276
1277 /* All uCode command responses, including Tx command responses,
1278 * Rx "responses" (frame-received notification), and other
1279 * notifications from uCode come through here*/
1280 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1281 iwl_rx_handle(priv);
1282 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1283 }
1284
1285 if (inta & CSR_INT_BIT_FH_TX) {
1286 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1287 handled |= CSR_INT_BIT_FH_TX;
1288 /* FH finished to write, send event */
1289 priv->ucode_write_complete = 1;
1290 wake_up_interruptible(&priv->wait_command_queue);
1291 }
1292
1293 if (inta & ~handled)
1294 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1295
1296 if (inta & ~CSR_INI_SET_MASK) {
1297 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1298 inta & ~CSR_INI_SET_MASK);
1299 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1300 }
1301
1302 /* Re-enable all interrupts */
1303 /* only Re-enable if diabled by irq */
1304 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1305 iwl_enable_interrupts(priv);
1306
1307 #ifdef CONFIG_IWLWIFI_DEBUG
1308 if (priv->debug_level & (IWL_DL_ISR)) {
1309 inta = iwl_read32(priv, CSR_INT);
1310 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1311 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1312 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1313 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1314 }
1315 #endif
1316 spin_unlock_irqrestore(&priv->lock, flags);
1317 }
1318
1319 static irqreturn_t iwl_isr(int irq, void *data)
1320 {
1321 struct iwl_priv *priv = data;
1322 u32 inta, inta_mask;
1323 u32 inta_fh;
1324 if (!priv)
1325 return IRQ_NONE;
1326
1327 spin_lock(&priv->lock);
1328
1329 /* Disable (but don't clear!) interrupts here to avoid
1330 * back-to-back ISRs and sporadic interrupts from our NIC.
1331 * If we have something to service, the tasklet will re-enable ints.
1332 * If we *don't* have something, we'll re-enable before leaving here. */
1333 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1334 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1335
1336 /* Discover which interrupts are active/pending */
1337 inta = iwl_read32(priv, CSR_INT);
1338 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1339
1340 /* Ignore interrupt if there's nothing in NIC to service.
1341 * This may be due to IRQ shared with another device,
1342 * or due to sporadic interrupts thrown from our NIC. */
1343 if (!inta && !inta_fh) {
1344 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1345 goto none;
1346 }
1347
1348 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1349 /* Hardware disappeared. It might have already raised
1350 * an interrupt */
1351 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1352 goto unplugged;
1353 }
1354
1355 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1356 inta, inta_mask, inta_fh);
1357
1358 inta &= ~CSR_INT_BIT_SCD;
1359
1360 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1361 if (likely(inta || inta_fh))
1362 tasklet_schedule(&priv->irq_tasklet);
1363
1364 unplugged:
1365 spin_unlock(&priv->lock);
1366 return IRQ_HANDLED;
1367
1368 none:
1369 /* re-enable interrupts here since we don't have anything to service. */
1370 /* only Re-enable if diabled by irq */
1371 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1372 iwl_enable_interrupts(priv);
1373 spin_unlock(&priv->lock);
1374 return IRQ_NONE;
1375 }
1376
1377 /******************************************************************************
1378 *
1379 * uCode download functions
1380 *
1381 ******************************************************************************/
1382
1383 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1384 {
1385 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1386 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1387 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1388 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1389 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1390 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1391 }
1392
1393 static void iwl_nic_start(struct iwl_priv *priv)
1394 {
1395 /* Remove all resets to allow NIC to operate */
1396 iwl_write32(priv, CSR_RESET, 0);
1397 }
1398
1399
1400 /**
1401 * iwl_read_ucode - Read uCode images from disk file.
1402 *
1403 * Copy into buffers for card to fetch via bus-mastering
1404 */
1405 static int iwl_read_ucode(struct iwl_priv *priv)
1406 {
1407 struct iwl_ucode *ucode;
1408 int ret = -EINVAL, index;
1409 const struct firmware *ucode_raw;
1410 const char *name_pre = priv->cfg->fw_name_pre;
1411 const unsigned int api_max = priv->cfg->ucode_api_max;
1412 const unsigned int api_min = priv->cfg->ucode_api_min;
1413 char buf[25];
1414 u8 *src;
1415 size_t len;
1416 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1417
1418 /* Ask kernel firmware_class module to get the boot firmware off disk.
1419 * request_firmware() is synchronous, file is in memory on return. */
1420 for (index = api_max; index >= api_min; index--) {
1421 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1422 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1423 if (ret < 0) {
1424 IWL_ERR(priv, "%s firmware file req failed: %d\n",
1425 buf, ret);
1426 if (ret == -ENOENT)
1427 continue;
1428 else
1429 goto error;
1430 } else {
1431 if (index < api_max)
1432 IWL_ERR(priv, "Loaded firmware %s, "
1433 "which is deprecated. "
1434 "Please use API v%u instead.\n",
1435 buf, api_max);
1436
1437 IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1438 buf, ucode_raw->size);
1439 break;
1440 }
1441 }
1442
1443 if (ret < 0)
1444 goto error;
1445
1446 /* Make sure that we got at least our header! */
1447 if (ucode_raw->size < sizeof(*ucode)) {
1448 IWL_ERR(priv, "File size way too small!\n");
1449 ret = -EINVAL;
1450 goto err_release;
1451 }
1452
1453 /* Data from ucode file: header followed by uCode images */
1454 ucode = (void *)ucode_raw->data;
1455
1456 priv->ucode_ver = le32_to_cpu(ucode->ver);
1457 api_ver = IWL_UCODE_API(priv->ucode_ver);
1458 inst_size = le32_to_cpu(ucode->inst_size);
1459 data_size = le32_to_cpu(ucode->data_size);
1460 init_size = le32_to_cpu(ucode->init_size);
1461 init_data_size = le32_to_cpu(ucode->init_data_size);
1462 boot_size = le32_to_cpu(ucode->boot_size);
1463
1464 /* api_ver should match the api version forming part of the
1465 * firmware filename ... but we don't check for that and only rely
1466 * on the API version read from firware header from here on forward */
1467
1468 if (api_ver < api_min || api_ver > api_max) {
1469 IWL_ERR(priv, "Driver unable to support your firmware API. "
1470 "Driver supports v%u, firmware is v%u.\n",
1471 api_max, api_ver);
1472 priv->ucode_ver = 0;
1473 ret = -EINVAL;
1474 goto err_release;
1475 }
1476 if (api_ver != api_max)
1477 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1478 "got v%u. New firmware can be obtained "
1479 "from http://www.intellinuxwireless.org.\n",
1480 api_max, api_ver);
1481
1482 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1483 IWL_UCODE_MAJOR(priv->ucode_ver),
1484 IWL_UCODE_MINOR(priv->ucode_ver),
1485 IWL_UCODE_API(priv->ucode_ver),
1486 IWL_UCODE_SERIAL(priv->ucode_ver));
1487
1488 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1489 priv->ucode_ver);
1490 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1491 inst_size);
1492 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1493 data_size);
1494 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1495 init_size);
1496 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1497 init_data_size);
1498 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1499 boot_size);
1500
1501 /* Verify size of file vs. image size info in file's header */
1502 if (ucode_raw->size < sizeof(*ucode) +
1503 inst_size + data_size + init_size +
1504 init_data_size + boot_size) {
1505
1506 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1507 (int)ucode_raw->size);
1508 ret = -EINVAL;
1509 goto err_release;
1510 }
1511
1512 /* Verify that uCode images will fit in card's SRAM */
1513 if (inst_size > priv->hw_params.max_inst_size) {
1514 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1515 inst_size);
1516 ret = -EINVAL;
1517 goto err_release;
1518 }
1519
1520 if (data_size > priv->hw_params.max_data_size) {
1521 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1522 data_size);
1523 ret = -EINVAL;
1524 goto err_release;
1525 }
1526 if (init_size > priv->hw_params.max_inst_size) {
1527 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1528 init_size);
1529 ret = -EINVAL;
1530 goto err_release;
1531 }
1532 if (init_data_size > priv->hw_params.max_data_size) {
1533 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1534 init_data_size);
1535 ret = -EINVAL;
1536 goto err_release;
1537 }
1538 if (boot_size > priv->hw_params.max_bsm_size) {
1539 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1540 boot_size);
1541 ret = -EINVAL;
1542 goto err_release;
1543 }
1544
1545 /* Allocate ucode buffers for card's bus-master loading ... */
1546
1547 /* Runtime instructions and 2 copies of data:
1548 * 1) unmodified from disk
1549 * 2) backup cache for save/restore during power-downs */
1550 priv->ucode_code.len = inst_size;
1551 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1552
1553 priv->ucode_data.len = data_size;
1554 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1555
1556 priv->ucode_data_backup.len = data_size;
1557 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1558
1559 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1560 !priv->ucode_data_backup.v_addr)
1561 goto err_pci_alloc;
1562
1563 /* Initialization instructions and data */
1564 if (init_size && init_data_size) {
1565 priv->ucode_init.len = init_size;
1566 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1567
1568 priv->ucode_init_data.len = init_data_size;
1569 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1570
1571 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1572 goto err_pci_alloc;
1573 }
1574
1575 /* Bootstrap (instructions only, no data) */
1576 if (boot_size) {
1577 priv->ucode_boot.len = boot_size;
1578 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1579
1580 if (!priv->ucode_boot.v_addr)
1581 goto err_pci_alloc;
1582 }
1583
1584 /* Copy images into buffers for card's bus-master reads ... */
1585
1586 /* Runtime instructions (first block of data in file) */
1587 src = &ucode->data[0];
1588 len = priv->ucode_code.len;
1589 IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1590 memcpy(priv->ucode_code.v_addr, src, len);
1591 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1592 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1593
1594 /* Runtime data (2nd block)
1595 * NOTE: Copy into backup buffer will be done in iwl_up() */
1596 src = &ucode->data[inst_size];
1597 len = priv->ucode_data.len;
1598 IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1599 memcpy(priv->ucode_data.v_addr, src, len);
1600 memcpy(priv->ucode_data_backup.v_addr, src, len);
1601
1602 /* Initialization instructions (3rd block) */
1603 if (init_size) {
1604 src = &ucode->data[inst_size + data_size];
1605 len = priv->ucode_init.len;
1606 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1607 len);
1608 memcpy(priv->ucode_init.v_addr, src, len);
1609 }
1610
1611 /* Initialization data (4th block) */
1612 if (init_data_size) {
1613 src = &ucode->data[inst_size + data_size + init_size];
1614 len = priv->ucode_init_data.len;
1615 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1616 len);
1617 memcpy(priv->ucode_init_data.v_addr, src, len);
1618 }
1619
1620 /* Bootstrap instructions (5th block) */
1621 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1622 len = priv->ucode_boot.len;
1623 IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1624 memcpy(priv->ucode_boot.v_addr, src, len);
1625
1626 /* We have our copies now, allow OS release its copies */
1627 release_firmware(ucode_raw);
1628 return 0;
1629
1630 err_pci_alloc:
1631 IWL_ERR(priv, "failed to allocate pci memory\n");
1632 ret = -ENOMEM;
1633 iwl_dealloc_ucode_pci(priv);
1634
1635 err_release:
1636 release_firmware(ucode_raw);
1637
1638 error:
1639 return ret;
1640 }
1641
1642 /* temporary */
1643 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1644 struct sk_buff *skb);
1645
1646 /**
1647 * iwl_alive_start - called after REPLY_ALIVE notification received
1648 * from protocol/runtime uCode (initialization uCode's
1649 * Alive gets handled by iwl_init_alive_start()).
1650 */
1651 static void iwl_alive_start(struct iwl_priv *priv)
1652 {
1653 int ret = 0;
1654
1655 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1656
1657 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1658 /* We had an error bringing up the hardware, so take it
1659 * all the way back down so we can try again */
1660 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1661 goto restart;
1662 }
1663
1664 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1665 * This is a paranoid check, because we would not have gotten the
1666 * "runtime" alive if code weren't properly loaded. */
1667 if (iwl_verify_ucode(priv)) {
1668 /* Runtime instruction load was bad;
1669 * take it all the way back down so we can try again */
1670 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1671 goto restart;
1672 }
1673
1674 iwl_clear_stations_table(priv);
1675 ret = priv->cfg->ops->lib->alive_notify(priv);
1676 if (ret) {
1677 IWL_WARN(priv,
1678 "Could not complete ALIVE transition [ntf]: %d\n", ret);
1679 goto restart;
1680 }
1681
1682 /* After the ALIVE response, we can send host commands to the uCode */
1683 set_bit(STATUS_ALIVE, &priv->status);
1684
1685 if (iwl_is_rfkill(priv))
1686 return;
1687
1688 ieee80211_wake_queues(priv->hw);
1689
1690 priv->active_rate = priv->rates_mask;
1691 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1692
1693 if (iwl_is_associated(priv)) {
1694 struct iwl_rxon_cmd *active_rxon =
1695 (struct iwl_rxon_cmd *)&priv->active_rxon;
1696
1697 memcpy(&priv->staging_rxon, &priv->active_rxon,
1698 sizeof(priv->staging_rxon));
1699 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1700 } else {
1701 /* Initialize our rx_config data */
1702 iwl_connection_init_rx_config(priv, priv->iw_mode);
1703 iwl_set_rxon_chain(priv);
1704 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1705 }
1706
1707 /* Configure Bluetooth device coexistence support */
1708 iwl_send_bt_config(priv);
1709
1710 iwl_reset_run_time_calib(priv);
1711
1712 /* Configure the adapter for unassociated operation */
1713 iwl_commit_rxon(priv);
1714
1715 /* At this point, the NIC is initialized and operational */
1716 iwl_rf_kill_ct_config(priv);
1717
1718 iwl_leds_register(priv);
1719
1720 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1721 set_bit(STATUS_READY, &priv->status);
1722 wake_up_interruptible(&priv->wait_command_queue);
1723
1724 if (priv->error_recovering)
1725 iwl_error_recovery(priv);
1726
1727 iwl_power_update_mode(priv, 1);
1728
1729 /* reassociate for ADHOC mode */
1730 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1731 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1732 priv->vif);
1733 if (beacon)
1734 iwl_mac_beacon_update(priv->hw, beacon);
1735 }
1736
1737
1738 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1739 iwl_set_mode(priv, priv->iw_mode);
1740
1741 return;
1742
1743 restart:
1744 queue_work(priv->workqueue, &priv->restart);
1745 }
1746
1747 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1748
1749 static void __iwl_down(struct iwl_priv *priv)
1750 {
1751 unsigned long flags;
1752 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1753
1754 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1755
1756 if (!exit_pending)
1757 set_bit(STATUS_EXIT_PENDING, &priv->status);
1758
1759 iwl_leds_unregister(priv);
1760
1761 iwl_clear_stations_table(priv);
1762
1763 /* Unblock any waiting calls */
1764 wake_up_interruptible_all(&priv->wait_command_queue);
1765
1766 /* Wipe out the EXIT_PENDING status bit if we are not actually
1767 * exiting the module */
1768 if (!exit_pending)
1769 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1770
1771 /* stop and reset the on-board processor */
1772 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1773
1774 /* tell the device to stop sending interrupts */
1775 spin_lock_irqsave(&priv->lock, flags);
1776 iwl_disable_interrupts(priv);
1777 spin_unlock_irqrestore(&priv->lock, flags);
1778 iwl_synchronize_irq(priv);
1779
1780 if (priv->mac80211_registered)
1781 ieee80211_stop_queues(priv->hw);
1782
1783 /* If we have not previously called iwl_init() then
1784 * clear all bits but the RF Kill and SUSPEND bits and return */
1785 if (!iwl_is_init(priv)) {
1786 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1787 STATUS_RF_KILL_HW |
1788 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1789 STATUS_RF_KILL_SW |
1790 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1791 STATUS_GEO_CONFIGURED |
1792 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1793 STATUS_IN_SUSPEND |
1794 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1795 STATUS_EXIT_PENDING;
1796 goto exit;
1797 }
1798
1799 /* ...otherwise clear out all the status bits but the RF Kill and
1800 * SUSPEND bits and continue taking the NIC down. */
1801 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1802 STATUS_RF_KILL_HW |
1803 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1804 STATUS_RF_KILL_SW |
1805 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1806 STATUS_GEO_CONFIGURED |
1807 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1808 STATUS_IN_SUSPEND |
1809 test_bit(STATUS_FW_ERROR, &priv->status) <<
1810 STATUS_FW_ERROR |
1811 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1812 STATUS_EXIT_PENDING;
1813
1814 spin_lock_irqsave(&priv->lock, flags);
1815 iwl_clear_bit(priv, CSR_GP_CNTRL,
1816 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1817 spin_unlock_irqrestore(&priv->lock, flags);
1818
1819 iwl_txq_ctx_stop(priv);
1820 iwl_rxq_stop(priv);
1821
1822 spin_lock_irqsave(&priv->lock, flags);
1823 if (!iwl_grab_nic_access(priv)) {
1824 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1825 APMG_CLK_VAL_DMA_CLK_RQT);
1826 iwl_release_nic_access(priv);
1827 }
1828 spin_unlock_irqrestore(&priv->lock, flags);
1829
1830 udelay(5);
1831
1832 /* FIXME: apm_ops.suspend(priv) */
1833 if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1834 priv->cfg->ops->lib->apm_ops.stop(priv);
1835 else
1836 priv->cfg->ops->lib->apm_ops.reset(priv);
1837 exit:
1838 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1839
1840 if (priv->ibss_beacon)
1841 dev_kfree_skb(priv->ibss_beacon);
1842 priv->ibss_beacon = NULL;
1843
1844 /* clear out any free frames */
1845 iwl_clear_free_frames(priv);
1846 }
1847
1848 static void iwl_down(struct iwl_priv *priv)
1849 {
1850 mutex_lock(&priv->mutex);
1851 __iwl_down(priv);
1852 mutex_unlock(&priv->mutex);
1853
1854 iwl_cancel_deferred_work(priv);
1855 }
1856
1857 #define MAX_HW_RESTARTS 5
1858
1859 static int __iwl_up(struct iwl_priv *priv)
1860 {
1861 int i;
1862 int ret;
1863
1864 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1865 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1866 return -EIO;
1867 }
1868
1869 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1870 IWL_ERR(priv, "ucode not available for device bringup\n");
1871 return -EIO;
1872 }
1873
1874 /* If platform's RF_KILL switch is NOT set to KILL */
1875 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1876 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1877 else
1878 set_bit(STATUS_RF_KILL_HW, &priv->status);
1879
1880 if (iwl_is_rfkill(priv)) {
1881 iwl_enable_interrupts(priv);
1882 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1883 test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1884 return 0;
1885 }
1886
1887 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1888
1889 ret = iwl_hw_nic_init(priv);
1890 if (ret) {
1891 IWL_ERR(priv, "Unable to init nic\n");
1892 return ret;
1893 }
1894
1895 /* make sure rfkill handshake bits are cleared */
1896 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1897 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1898 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1899
1900 /* clear (again), then enable host interrupts */
1901 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1902 iwl_enable_interrupts(priv);
1903
1904 /* really make sure rfkill handshake bits are cleared */
1905 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1906 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1907
1908 /* Copy original ucode data image from disk into backup cache.
1909 * This will be used to initialize the on-board processor's
1910 * data SRAM for a clean start when the runtime program first loads. */
1911 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1912 priv->ucode_data.len);
1913
1914 for (i = 0; i < MAX_HW_RESTARTS; i++) {
1915
1916 iwl_clear_stations_table(priv);
1917
1918 /* load bootstrap state machine,
1919 * load bootstrap program into processor's memory,
1920 * prepare to load the "initialize" uCode */
1921 ret = priv->cfg->ops->lib->load_ucode(priv);
1922
1923 if (ret) {
1924 IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1925 ret);
1926 continue;
1927 }
1928
1929 /* Clear out the uCode error bit if it is set */
1930 clear_bit(STATUS_FW_ERROR, &priv->status);
1931
1932 /* start card; "initialize" will load runtime ucode */
1933 iwl_nic_start(priv);
1934
1935 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1936
1937 return 0;
1938 }
1939
1940 set_bit(STATUS_EXIT_PENDING, &priv->status);
1941 __iwl_down(priv);
1942 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1943
1944 /* tried to restart and config the device for as long as our
1945 * patience could withstand */
1946 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1947 return -EIO;
1948 }
1949
1950
1951 /*****************************************************************************
1952 *
1953 * Workqueue callbacks
1954 *
1955 *****************************************************************************/
1956
1957 static void iwl_bg_init_alive_start(struct work_struct *data)
1958 {
1959 struct iwl_priv *priv =
1960 container_of(data, struct iwl_priv, init_alive_start.work);
1961
1962 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1963 return;
1964
1965 mutex_lock(&priv->mutex);
1966 priv->cfg->ops->lib->init_alive_start(priv);
1967 mutex_unlock(&priv->mutex);
1968 }
1969
1970 static void iwl_bg_alive_start(struct work_struct *data)
1971 {
1972 struct iwl_priv *priv =
1973 container_of(data, struct iwl_priv, alive_start.work);
1974
1975 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1976 return;
1977
1978 mutex_lock(&priv->mutex);
1979 iwl_alive_start(priv);
1980 mutex_unlock(&priv->mutex);
1981 }
1982
1983 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1984 {
1985 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1986 run_time_calib_work);
1987
1988 mutex_lock(&priv->mutex);
1989
1990 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1991 test_bit(STATUS_SCANNING, &priv->status)) {
1992 mutex_unlock(&priv->mutex);
1993 return;
1994 }
1995
1996 if (priv->start_calib) {
1997 iwl_chain_noise_calibration(priv, &priv->statistics);
1998
1999 iwl_sensitivity_calibration(priv, &priv->statistics);
2000 }
2001
2002 mutex_unlock(&priv->mutex);
2003 return;
2004 }
2005
2006 static void iwl_bg_up(struct work_struct *data)
2007 {
2008 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2009
2010 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2011 return;
2012
2013 mutex_lock(&priv->mutex);
2014 __iwl_up(priv);
2015 mutex_unlock(&priv->mutex);
2016 iwl_rfkill_set_hw_state(priv);
2017 }
2018
2019 static void iwl_bg_restart(struct work_struct *data)
2020 {
2021 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2022
2023 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2024 return;
2025
2026 iwl_down(priv);
2027 queue_work(priv->workqueue, &priv->up);
2028 }
2029
2030 static void iwl_bg_rx_replenish(struct work_struct *data)
2031 {
2032 struct iwl_priv *priv =
2033 container_of(data, struct iwl_priv, rx_replenish);
2034
2035 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2036 return;
2037
2038 mutex_lock(&priv->mutex);
2039 iwl_rx_replenish(priv);
2040 mutex_unlock(&priv->mutex);
2041 }
2042
2043 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2044
2045 static void iwl_post_associate(struct iwl_priv *priv)
2046 {
2047 struct ieee80211_conf *conf = NULL;
2048 int ret = 0;
2049 unsigned long flags;
2050
2051 if (priv->iw_mode == NL80211_IFTYPE_AP) {
2052 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2053 return;
2054 }
2055
2056 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2057 priv->assoc_id, priv->active_rxon.bssid_addr);
2058
2059
2060 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2061 return;
2062
2063
2064 if (!priv->vif || !priv->is_open)
2065 return;
2066
2067 iwl_power_cancel_timeout(priv);
2068 iwl_scan_cancel_timeout(priv, 200);
2069
2070 conf = ieee80211_get_hw_conf(priv->hw);
2071
2072 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2073 iwl_commit_rxon(priv);
2074
2075 iwl_setup_rxon_timing(priv);
2076 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2077 sizeof(priv->rxon_timing), &priv->rxon_timing);
2078 if (ret)
2079 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2080 "Attempting to continue.\n");
2081
2082 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2083
2084 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2085
2086 iwl_set_rxon_chain(priv);
2087 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2088
2089 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2090 priv->assoc_id, priv->beacon_int);
2091
2092 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2093 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2094 else
2095 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2096
2097 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2098 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2099 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2100 else
2101 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2102
2103 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2104 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2105
2106 }
2107
2108 iwl_commit_rxon(priv);
2109
2110 switch (priv->iw_mode) {
2111 case NL80211_IFTYPE_STATION:
2112 break;
2113
2114 case NL80211_IFTYPE_ADHOC:
2115
2116 /* assume default assoc id */
2117 priv->assoc_id = 1;
2118
2119 iwl_rxon_add_station(priv, priv->bssid, 0);
2120 iwl_send_beacon_cmd(priv);
2121
2122 break;
2123
2124 default:
2125 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2126 __func__, priv->iw_mode);
2127 break;
2128 }
2129
2130 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2131 priv->assoc_station_added = 1;
2132
2133 spin_lock_irqsave(&priv->lock, flags);
2134 iwl_activate_qos(priv, 0);
2135 spin_unlock_irqrestore(&priv->lock, flags);
2136
2137 /* the chain noise calibration will enabled PM upon completion
2138 * If chain noise has already been run, then we need to enable
2139 * power management here */
2140 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2141 iwl_power_enable_management(priv);
2142
2143 /* Enable Rx differential gain and sensitivity calibrations */
2144 iwl_chain_noise_reset(priv);
2145 priv->start_calib = 1;
2146
2147 }
2148
2149 /*****************************************************************************
2150 *
2151 * mac80211 entry point functions
2152 *
2153 *****************************************************************************/
2154
2155 #define UCODE_READY_TIMEOUT (4 * HZ)
2156
2157 static int iwl_mac_start(struct ieee80211_hw *hw)
2158 {
2159 struct iwl_priv *priv = hw->priv;
2160 int ret;
2161
2162 IWL_DEBUG_MAC80211(priv, "enter\n");
2163
2164 /* we should be verifying the device is ready to be opened */
2165 mutex_lock(&priv->mutex);
2166
2167 memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2168 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2169 * ucode filename and max sizes are card-specific. */
2170
2171 if (!priv->ucode_code.len) {
2172 ret = iwl_read_ucode(priv);
2173 if (ret) {
2174 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2175 mutex_unlock(&priv->mutex);
2176 return ret;
2177 }
2178 }
2179
2180 ret = __iwl_up(priv);
2181
2182 mutex_unlock(&priv->mutex);
2183
2184 iwl_rfkill_set_hw_state(priv);
2185
2186 if (ret)
2187 return ret;
2188
2189 if (iwl_is_rfkill(priv))
2190 goto out;
2191
2192 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2193
2194 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2195 return 0;
2196
2197 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2198 * mac80211 will not be run successfully. */
2199 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2200 test_bit(STATUS_READY, &priv->status),
2201 UCODE_READY_TIMEOUT);
2202 if (!ret) {
2203 if (!test_bit(STATUS_READY, &priv->status)) {
2204 IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2205 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2206 return -ETIMEDOUT;
2207 }
2208 }
2209
2210 out:
2211 priv->is_open = 1;
2212 IWL_DEBUG_MAC80211(priv, "leave\n");
2213 return 0;
2214 }
2215
2216 static void iwl_mac_stop(struct ieee80211_hw *hw)
2217 {
2218 struct iwl_priv *priv = hw->priv;
2219
2220 IWL_DEBUG_MAC80211(priv, "enter\n");
2221
2222 if (!priv->is_open) {
2223 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2224 return;
2225 }
2226
2227 priv->is_open = 0;
2228
2229 if (iwl_is_ready_rf(priv)) {
2230 /* stop mac, cancel any scan request and clear
2231 * RXON_FILTER_ASSOC_MSK BIT
2232 */
2233 mutex_lock(&priv->mutex);
2234 iwl_scan_cancel_timeout(priv, 100);
2235 mutex_unlock(&priv->mutex);
2236 }
2237
2238 iwl_down(priv);
2239
2240 flush_workqueue(priv->workqueue);
2241
2242 /* enable interrupts again in order to receive rfkill changes */
2243 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2244 iwl_enable_interrupts(priv);
2245
2246 IWL_DEBUG_MAC80211(priv, "leave\n");
2247 }
2248
2249 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2250 {
2251 struct iwl_priv *priv = hw->priv;
2252
2253 IWL_DEBUG_MACDUMP(priv, "enter\n");
2254
2255 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2256 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2257
2258 if (iwl_tx_skb(priv, skb))
2259 dev_kfree_skb_any(skb);
2260
2261 IWL_DEBUG_MACDUMP(priv, "leave\n");
2262 return NETDEV_TX_OK;
2263 }
2264
2265 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2266 struct ieee80211_if_init_conf *conf)
2267 {
2268 struct iwl_priv *priv = hw->priv;
2269 unsigned long flags;
2270
2271 IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2272
2273 if (priv->vif) {
2274 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2275 return -EOPNOTSUPP;
2276 }
2277
2278 spin_lock_irqsave(&priv->lock, flags);
2279 priv->vif = conf->vif;
2280 priv->iw_mode = conf->type;
2281
2282 spin_unlock_irqrestore(&priv->lock, flags);
2283
2284 mutex_lock(&priv->mutex);
2285
2286 if (conf->mac_addr) {
2287 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2288 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2289 }
2290
2291 if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2292 /* we are not ready, will run again when ready */
2293 set_bit(STATUS_MODE_PENDING, &priv->status);
2294
2295 mutex_unlock(&priv->mutex);
2296
2297 IWL_DEBUG_MAC80211(priv, "leave\n");
2298 return 0;
2299 }
2300
2301 /**
2302 * iwl_mac_config - mac80211 config callback
2303 *
2304 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2305 * be set inappropriately and the driver currently sets the hardware up to
2306 * use it whenever needed.
2307 */
2308 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2309 {
2310 struct iwl_priv *priv = hw->priv;
2311 const struct iwl_channel_info *ch_info;
2312 struct ieee80211_conf *conf = &hw->conf;
2313 unsigned long flags;
2314 int ret = 0;
2315 u16 channel;
2316
2317 mutex_lock(&priv->mutex);
2318 IWL_DEBUG_MAC80211(priv, "enter to channel %d\n", conf->channel->hw_value);
2319
2320 priv->current_ht_config.is_ht = conf_is_ht(conf);
2321
2322 if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2323 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
2324 goto out;
2325 }
2326
2327 if (!conf->radio_enabled)
2328 iwl_radio_kill_sw_disable_radio(priv);
2329
2330 if (!iwl_is_ready(priv)) {
2331 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2332 ret = -EIO;
2333 goto out;
2334 }
2335
2336 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2337 test_bit(STATUS_SCANNING, &priv->status))) {
2338 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2339 mutex_unlock(&priv->mutex);
2340 return 0;
2341 }
2342
2343 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2344 ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2345 if (!is_channel_valid(ch_info)) {
2346 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2347 ret = -EINVAL;
2348 goto out;
2349 }
2350
2351 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2352 !is_channel_ibss(ch_info)) {
2353 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2354 conf->channel->hw_value, conf->channel->band);
2355 ret = -EINVAL;
2356 goto out;
2357 }
2358
2359 spin_lock_irqsave(&priv->lock, flags);
2360
2361
2362 /* if we are switching from ht to 2.4 clear flags
2363 * from any ht related info since 2.4 does not
2364 * support ht */
2365 if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2366 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2367 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2368 #endif
2369 )
2370 priv->staging_rxon.flags = 0;
2371
2372 iwl_set_rxon_channel(priv, conf->channel);
2373
2374 iwl_set_flags_for_band(priv, conf->channel->band);
2375
2376 /* The list of supported rates and rate mask can be different
2377 * for each band; since the band may have changed, reset
2378 * the rate mask to what mac80211 lists */
2379 iwl_set_rate(priv);
2380
2381 spin_unlock_irqrestore(&priv->lock, flags);
2382
2383 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2384 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2385 iwl_hw_channel_switch(priv, conf->channel);
2386 goto out;
2387 }
2388 #endif
2389
2390 if (!conf->radio_enabled) {
2391 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2392 goto out;
2393 }
2394
2395 if (iwl_is_rfkill(priv)) {
2396 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
2397 ret = -EIO;
2398 goto out;
2399 }
2400
2401 if (conf->flags & IEEE80211_CONF_PS)
2402 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2403 else
2404 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2405 if (ret)
2406 IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2407
2408 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2409 priv->tx_power_user_lmt, conf->power_level);
2410
2411 iwl_set_tx_power(priv, conf->power_level, false);
2412
2413 iwl_set_rate(priv);
2414
2415 /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2416 iwl_set_rxon_chain(priv);
2417
2418 if (memcmp(&priv->active_rxon,
2419 &priv->staging_rxon, sizeof(priv->staging_rxon)))
2420 iwl_commit_rxon(priv);
2421 else
2422 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2423
2424 IWL_DEBUG_MAC80211(priv, "leave\n");
2425
2426 out:
2427 mutex_unlock(&priv->mutex);
2428 return ret;
2429 }
2430
2431 static void iwl_config_ap(struct iwl_priv *priv)
2432 {
2433 int ret = 0;
2434 unsigned long flags;
2435
2436 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2437 return;
2438
2439 /* The following should be done only at AP bring up */
2440 if (!iwl_is_associated(priv)) {
2441
2442 /* RXON - unassoc (to set timing command) */
2443 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2444 iwl_commit_rxon(priv);
2445
2446 /* RXON Timing */
2447 iwl_setup_rxon_timing(priv);
2448 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2449 sizeof(priv->rxon_timing), &priv->rxon_timing);
2450 if (ret)
2451 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2452 "Attempting to continue.\n");
2453
2454 iwl_set_rxon_chain(priv);
2455
2456 /* FIXME: what should be the assoc_id for AP? */
2457 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2458 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2459 priv->staging_rxon.flags |=
2460 RXON_FLG_SHORT_PREAMBLE_MSK;
2461 else
2462 priv->staging_rxon.flags &=
2463 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2464
2465 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2466 if (priv->assoc_capability &
2467 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2468 priv->staging_rxon.flags |=
2469 RXON_FLG_SHORT_SLOT_MSK;
2470 else
2471 priv->staging_rxon.flags &=
2472 ~RXON_FLG_SHORT_SLOT_MSK;
2473
2474 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2475 priv->staging_rxon.flags &=
2476 ~RXON_FLG_SHORT_SLOT_MSK;
2477 }
2478 /* restore RXON assoc */
2479 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2480 iwl_commit_rxon(priv);
2481 spin_lock_irqsave(&priv->lock, flags);
2482 iwl_activate_qos(priv, 1);
2483 spin_unlock_irqrestore(&priv->lock, flags);
2484 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2485 }
2486 iwl_send_beacon_cmd(priv);
2487
2488 /* FIXME - we need to add code here to detect a totally new
2489 * configuration, reset the AP, unassoc, rxon timing, assoc,
2490 * clear sta table, add BCAST sta... */
2491 }
2492
2493
2494 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2495 struct ieee80211_vif *vif,
2496 struct ieee80211_if_conf *conf)
2497 {
2498 struct iwl_priv *priv = hw->priv;
2499 int rc;
2500
2501 if (conf == NULL)
2502 return -EIO;
2503
2504 if (priv->vif != vif) {
2505 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2506 return 0;
2507 }
2508
2509 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2510 conf->changed & IEEE80211_IFCC_BEACON) {
2511 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2512 if (!beacon)
2513 return -ENOMEM;
2514 mutex_lock(&priv->mutex);
2515 rc = iwl_mac_beacon_update(hw, beacon);
2516 mutex_unlock(&priv->mutex);
2517 if (rc)
2518 return rc;
2519 }
2520
2521 if (!iwl_is_alive(priv))
2522 return -EAGAIN;
2523
2524 mutex_lock(&priv->mutex);
2525
2526 if (conf->bssid)
2527 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2528
2529 /*
2530 * very dubious code was here; the probe filtering flag is never set:
2531 *
2532 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2533 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2534 */
2535
2536 if (priv->iw_mode == NL80211_IFTYPE_AP) {
2537 if (!conf->bssid) {
2538 conf->bssid = priv->mac_addr;
2539 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2540 IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2541 conf->bssid);
2542 }
2543 if (priv->ibss_beacon)
2544 dev_kfree_skb(priv->ibss_beacon);
2545
2546 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2547 }
2548
2549 if (iwl_is_rfkill(priv))
2550 goto done;
2551
2552 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2553 !is_multicast_ether_addr(conf->bssid)) {
2554 /* If there is currently a HW scan going on in the background
2555 * then we need to cancel it else the RXON below will fail. */
2556 if (iwl_scan_cancel_timeout(priv, 100)) {
2557 IWL_WARN(priv, "Aborted scan still in progress "
2558 "after 100ms\n");
2559 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2560 mutex_unlock(&priv->mutex);
2561 return -EAGAIN;
2562 }
2563 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2564
2565 /* TODO: Audit driver for usage of these members and see
2566 * if mac80211 deprecates them (priv->bssid looks like it
2567 * shouldn't be there, but I haven't scanned the IBSS code
2568 * to verify) - jpk */
2569 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2570
2571 if (priv->iw_mode == NL80211_IFTYPE_AP)
2572 iwl_config_ap(priv);
2573 else {
2574 rc = iwl_commit_rxon(priv);
2575 if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2576 iwl_rxon_add_station(
2577 priv, priv->active_rxon.bssid_addr, 1);
2578 }
2579
2580 } else {
2581 iwl_scan_cancel_timeout(priv, 100);
2582 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2583 iwl_commit_rxon(priv);
2584 }
2585
2586 done:
2587 IWL_DEBUG_MAC80211(priv, "leave\n");
2588 mutex_unlock(&priv->mutex);
2589
2590 return 0;
2591 }
2592
2593 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2594 struct ieee80211_if_init_conf *conf)
2595 {
2596 struct iwl_priv *priv = hw->priv;
2597
2598 IWL_DEBUG_MAC80211(priv, "enter\n");
2599
2600 mutex_lock(&priv->mutex);
2601
2602 if (iwl_is_ready_rf(priv)) {
2603 iwl_scan_cancel_timeout(priv, 100);
2604 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2605 iwl_commit_rxon(priv);
2606 }
2607 if (priv->vif == conf->vif) {
2608 priv->vif = NULL;
2609 memset(priv->bssid, 0, ETH_ALEN);
2610 }
2611 mutex_unlock(&priv->mutex);
2612
2613 IWL_DEBUG_MAC80211(priv, "leave\n");
2614
2615 }
2616
2617 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2618 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2619 struct ieee80211_vif *vif,
2620 struct ieee80211_bss_conf *bss_conf,
2621 u32 changes)
2622 {
2623 struct iwl_priv *priv = hw->priv;
2624
2625 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2626
2627 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2628 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2629 bss_conf->use_short_preamble);
2630 if (bss_conf->use_short_preamble)
2631 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2632 else
2633 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2634 }
2635
2636 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2637 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2638 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2639 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2640 else
2641 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2642 }
2643
2644 if (changes & BSS_CHANGED_HT) {
2645 iwl_ht_conf(priv, bss_conf);
2646 iwl_set_rxon_chain(priv);
2647 }
2648
2649 if (changes & BSS_CHANGED_ASSOC) {
2650 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2651 /* This should never happen as this function should
2652 * never be called from interrupt context. */
2653 if (WARN_ON_ONCE(in_interrupt()))
2654 return;
2655 if (bss_conf->assoc) {
2656 priv->assoc_id = bss_conf->aid;
2657 priv->beacon_int = bss_conf->beacon_int;
2658 priv->power_data.dtim_period = bss_conf->dtim_period;
2659 priv->timestamp = bss_conf->timestamp;
2660 priv->assoc_capability = bss_conf->assoc_capability;
2661
2662 /* we have just associated, don't start scan too early
2663 * leave time for EAPOL exchange to complete
2664 */
2665 priv->next_scan_jiffies = jiffies +
2666 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2667 mutex_lock(&priv->mutex);
2668 iwl_post_associate(priv);
2669 mutex_unlock(&priv->mutex);
2670 } else {
2671 priv->assoc_id = 0;
2672 IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2673 }
2674 } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2675 IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2676 iwl_send_rxon_assoc(priv);
2677 }
2678
2679 }
2680
2681 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
2682 {
2683 unsigned long flags;
2684 struct iwl_priv *priv = hw->priv;
2685 int ret;
2686
2687 IWL_DEBUG_MAC80211(priv, "enter\n");
2688
2689 mutex_lock(&priv->mutex);
2690 spin_lock_irqsave(&priv->lock, flags);
2691
2692 if (!iwl_is_ready_rf(priv)) {
2693 ret = -EIO;
2694 IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
2695 goto out_unlock;
2696 }
2697
2698 /* We don't schedule scan within next_scan_jiffies period.
2699 * Avoid scanning during possible EAPOL exchange, return
2700 * success immediately.
2701 */
2702 if (priv->next_scan_jiffies &&
2703 time_after(priv->next_scan_jiffies, jiffies)) {
2704 IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n");
2705 queue_work(priv->workqueue, &priv->scan_completed);
2706 ret = 0;
2707 goto out_unlock;
2708 }
2709
2710 /* if we just finished scan ask for delay */
2711 if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
2712 time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
2713 IWL_DEBUG_SCAN(priv, "scan rejected: within previous scan period\n");
2714 queue_work(priv->workqueue, &priv->scan_completed);
2715 ret = 0;
2716 goto out_unlock;
2717 }
2718
2719 if (ssid_len) {
2720 priv->one_direct_scan = 1;
2721 priv->direct_ssid_len = min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
2722 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
2723 } else {
2724 priv->one_direct_scan = 0;
2725 }
2726
2727 ret = iwl_scan_initiate(priv);
2728
2729 IWL_DEBUG_MAC80211(priv, "leave\n");
2730
2731 out_unlock:
2732 spin_unlock_irqrestore(&priv->lock, flags);
2733 mutex_unlock(&priv->mutex);
2734
2735 return ret;
2736 }
2737
2738 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2739 struct ieee80211_key_conf *keyconf, const u8 *addr,
2740 u32 iv32, u16 *phase1key)
2741 {
2742
2743 struct iwl_priv *priv = hw->priv;
2744 IWL_DEBUG_MAC80211(priv, "enter\n");
2745
2746 iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2747
2748 IWL_DEBUG_MAC80211(priv, "leave\n");
2749 }
2750
2751 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2752 struct ieee80211_vif *vif,
2753 struct ieee80211_sta *sta,
2754 struct ieee80211_key_conf *key)
2755 {
2756 struct iwl_priv *priv = hw->priv;
2757 const u8 *addr;
2758 int ret;
2759 u8 sta_id;
2760 bool is_default_wep_key = false;
2761
2762 IWL_DEBUG_MAC80211(priv, "enter\n");
2763
2764 if (priv->hw_params.sw_crypto) {
2765 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2766 return -EOPNOTSUPP;
2767 }
2768 addr = sta ? sta->addr : iwl_bcast_addr;
2769 sta_id = iwl_find_station(priv, addr);
2770 if (sta_id == IWL_INVALID_STATION) {
2771 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2772 addr);
2773 return -EINVAL;
2774
2775 }
2776
2777 mutex_lock(&priv->mutex);
2778 iwl_scan_cancel_timeout(priv, 100);
2779 mutex_unlock(&priv->mutex);
2780
2781 /* If we are getting WEP group key and we didn't receive any key mapping
2782 * so far, we are in legacy wep mode (group key only), otherwise we are
2783 * in 1X mode.
2784 * In legacy wep mode, we use another host command to the uCode */
2785 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2786 priv->iw_mode != NL80211_IFTYPE_AP) {
2787 if (cmd == SET_KEY)
2788 is_default_wep_key = !priv->key_mapping_key;
2789 else
2790 is_default_wep_key =
2791 (key->hw_key_idx == HW_KEY_DEFAULT);
2792 }
2793
2794 switch (cmd) {
2795 case SET_KEY:
2796 if (is_default_wep_key)
2797 ret = iwl_set_default_wep_key(priv, key);
2798 else
2799 ret = iwl_set_dynamic_key(priv, key, sta_id);
2800
2801 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2802 break;
2803 case DISABLE_KEY:
2804 if (is_default_wep_key)
2805 ret = iwl_remove_default_wep_key(priv, key);
2806 else
2807 ret = iwl_remove_dynamic_key(priv, key, sta_id);
2808
2809 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2810 break;
2811 default:
2812 ret = -EINVAL;
2813 }
2814
2815 IWL_DEBUG_MAC80211(priv, "leave\n");
2816
2817 return ret;
2818 }
2819
2820 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2821 const struct ieee80211_tx_queue_params *params)
2822 {
2823 struct iwl_priv *priv = hw->priv;
2824 unsigned long flags;
2825 int q;
2826
2827 IWL_DEBUG_MAC80211(priv, "enter\n");
2828
2829 if (!iwl_is_ready_rf(priv)) {
2830 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2831 return -EIO;
2832 }
2833
2834 if (queue >= AC_NUM) {
2835 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2836 return 0;
2837 }
2838
2839 q = AC_NUM - 1 - queue;
2840
2841 spin_lock_irqsave(&priv->lock, flags);
2842
2843 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2844 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2845 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2846 priv->qos_data.def_qos_parm.ac[q].edca_txop =
2847 cpu_to_le16((params->txop * 32));
2848
2849 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2850 priv->qos_data.qos_active = 1;
2851
2852 if (priv->iw_mode == NL80211_IFTYPE_AP)
2853 iwl_activate_qos(priv, 1);
2854 else if (priv->assoc_id && iwl_is_associated(priv))
2855 iwl_activate_qos(priv, 0);
2856
2857 spin_unlock_irqrestore(&priv->lock, flags);
2858
2859 IWL_DEBUG_MAC80211(priv, "leave\n");
2860 return 0;
2861 }
2862
2863 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2864 enum ieee80211_ampdu_mlme_action action,
2865 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2866 {
2867 struct iwl_priv *priv = hw->priv;
2868
2869 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2870 sta->addr, tid);
2871
2872 if (!(priv->cfg->sku & IWL_SKU_N))
2873 return -EACCES;
2874
2875 switch (action) {
2876 case IEEE80211_AMPDU_RX_START:
2877 IWL_DEBUG_HT(priv, "start Rx\n");
2878 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2879 case IEEE80211_AMPDU_RX_STOP:
2880 IWL_DEBUG_HT(priv, "stop Rx\n");
2881 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2882 case IEEE80211_AMPDU_TX_START:
2883 IWL_DEBUG_HT(priv, "start Tx\n");
2884 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2885 case IEEE80211_AMPDU_TX_STOP:
2886 IWL_DEBUG_HT(priv, "stop Tx\n");
2887 return iwl_tx_agg_stop(priv, sta->addr, tid);
2888 default:
2889 IWL_DEBUG_HT(priv, "unknown\n");
2890 return -EINVAL;
2891 break;
2892 }
2893 return 0;
2894 }
2895
2896 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2897 struct ieee80211_tx_queue_stats *stats)
2898 {
2899 struct iwl_priv *priv = hw->priv;
2900 int i, avail;
2901 struct iwl_tx_queue *txq;
2902 struct iwl_queue *q;
2903 unsigned long flags;
2904
2905 IWL_DEBUG_MAC80211(priv, "enter\n");
2906
2907 if (!iwl_is_ready_rf(priv)) {
2908 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2909 return -EIO;
2910 }
2911
2912 spin_lock_irqsave(&priv->lock, flags);
2913
2914 for (i = 0; i < AC_NUM; i++) {
2915 txq = &priv->txq[i];
2916 q = &txq->q;
2917 avail = iwl_queue_space(q);
2918
2919 stats[i].len = q->n_window - avail;
2920 stats[i].limit = q->n_window - q->high_mark;
2921 stats[i].count = q->n_window;
2922
2923 }
2924 spin_unlock_irqrestore(&priv->lock, flags);
2925
2926 IWL_DEBUG_MAC80211(priv, "leave\n");
2927
2928 return 0;
2929 }
2930
2931 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2932 struct ieee80211_low_level_stats *stats)
2933 {
2934 struct iwl_priv *priv = hw->priv;
2935
2936 priv = hw->priv;
2937 IWL_DEBUG_MAC80211(priv, "enter\n");
2938 IWL_DEBUG_MAC80211(priv, "leave\n");
2939
2940 return 0;
2941 }
2942
2943 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2944 {
2945 struct iwl_priv *priv = hw->priv;
2946 unsigned long flags;
2947
2948 mutex_lock(&priv->mutex);
2949 IWL_DEBUG_MAC80211(priv, "enter\n");
2950
2951 spin_lock_irqsave(&priv->lock, flags);
2952 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2953 spin_unlock_irqrestore(&priv->lock, flags);
2954
2955 iwl_reset_qos(priv);
2956
2957 spin_lock_irqsave(&priv->lock, flags);
2958 priv->assoc_id = 0;
2959 priv->assoc_capability = 0;
2960 priv->assoc_station_added = 0;
2961
2962 /* new association get rid of ibss beacon skb */
2963 if (priv->ibss_beacon)
2964 dev_kfree_skb(priv->ibss_beacon);
2965
2966 priv->ibss_beacon = NULL;
2967
2968 priv->beacon_int = priv->hw->conf.beacon_int;
2969 priv->timestamp = 0;
2970 if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2971 priv->beacon_int = 0;
2972
2973 spin_unlock_irqrestore(&priv->lock, flags);
2974
2975 if (!iwl_is_ready_rf(priv)) {
2976 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2977 mutex_unlock(&priv->mutex);
2978 return;
2979 }
2980
2981 /* we are restarting association process
2982 * clear RXON_FILTER_ASSOC_MSK bit
2983 */
2984 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2985 iwl_scan_cancel_timeout(priv, 100);
2986 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2987 iwl_commit_rxon(priv);
2988 }
2989
2990 iwl_power_update_mode(priv, 0);
2991
2992 /* Per mac80211.h: This is only used in IBSS mode... */
2993 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2994
2995 /* switch to CAM during association period.
2996 * the ucode will block any association/authentication
2997 * frome during assiciation period if it can not hear
2998 * the AP because of PM. the timer enable PM back is
2999 * association do not complete
3000 */
3001 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3002 IEEE80211_CHAN_RADAR))
3003 iwl_power_disable_management(priv, 3000);
3004
3005 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
3006 mutex_unlock(&priv->mutex);
3007 return;
3008 }
3009
3010 iwl_set_rate(priv);
3011
3012 mutex_unlock(&priv->mutex);
3013
3014 IWL_DEBUG_MAC80211(priv, "leave\n");
3015 }
3016
3017 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3018 {
3019 struct iwl_priv *priv = hw->priv;
3020 unsigned long flags;
3021 __le64 timestamp;
3022
3023 IWL_DEBUG_MAC80211(priv, "enter\n");
3024
3025 if (!iwl_is_ready_rf(priv)) {
3026 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
3027 return -EIO;
3028 }
3029
3030 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3031 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
3032 return -EIO;
3033 }
3034
3035 spin_lock_irqsave(&priv->lock, flags);
3036
3037 if (priv->ibss_beacon)
3038 dev_kfree_skb(priv->ibss_beacon);
3039
3040 priv->ibss_beacon = skb;
3041
3042 priv->assoc_id = 0;
3043 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3044 priv->timestamp = le64_to_cpu(timestamp);
3045
3046 IWL_DEBUG_MAC80211(priv, "leave\n");
3047 spin_unlock_irqrestore(&priv->lock, flags);
3048
3049 iwl_reset_qos(priv);
3050
3051 iwl_post_associate(priv);
3052
3053
3054 return 0;
3055 }
3056
3057 /*****************************************************************************
3058 *
3059 * sysfs attributes
3060 *
3061 *****************************************************************************/
3062
3063 #ifdef CONFIG_IWLWIFI_DEBUG
3064
3065 /*
3066 * The following adds a new attribute to the sysfs representation
3067 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3068 * used for controlling the debug level.
3069 *
3070 * See the level definitions in iwl for details.
3071 */
3072
3073 static ssize_t show_debug_level(struct device *d,
3074 struct device_attribute *attr, char *buf)
3075 {
3076 struct iwl_priv *priv = d->driver_data;
3077
3078 return sprintf(buf, "0x%08X\n", priv->debug_level);
3079 }
3080 static ssize_t store_debug_level(struct device *d,
3081 struct device_attribute *attr,
3082 const char *buf, size_t count)
3083 {
3084 struct iwl_priv *priv = d->driver_data;
3085 unsigned long val;
3086 int ret;
3087
3088 ret = strict_strtoul(buf, 0, &val);
3089 if (ret)
3090 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3091 else
3092 priv->debug_level = val;
3093
3094 return strnlen(buf, count);
3095 }
3096
3097 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3098 show_debug_level, store_debug_level);
3099
3100
3101 #endif /* CONFIG_IWLWIFI_DEBUG */
3102
3103
3104 static ssize_t show_version(struct device *d,
3105 struct device_attribute *attr, char *buf)
3106 {
3107 struct iwl_priv *priv = d->driver_data;
3108 struct iwl_alive_resp *palive = &priv->card_alive;
3109 ssize_t pos = 0;
3110 u16 eeprom_ver;
3111
3112 if (palive->is_valid)
3113 pos += sprintf(buf + pos,
3114 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3115 "fw type: 0x%01X 0x%01X\n",
3116 palive->ucode_major, palive->ucode_minor,
3117 palive->sw_rev[0], palive->sw_rev[1],
3118 palive->ver_type, palive->ver_subtype);
3119 else
3120 pos += sprintf(buf + pos, "fw not loaded\n");
3121
3122 if (priv->eeprom) {
3123 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3124 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3125 eeprom_ver);
3126 } else {
3127 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3128 }
3129
3130 return pos;
3131 }
3132
3133 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3134
3135 static ssize_t show_temperature(struct device *d,
3136 struct device_attribute *attr, char *buf)
3137 {
3138 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3139
3140 if (!iwl_is_alive(priv))
3141 return -EAGAIN;
3142
3143 return sprintf(buf, "%d\n", priv->temperature);
3144 }
3145
3146 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3147
3148 static ssize_t show_tx_power(struct device *d,
3149 struct device_attribute *attr, char *buf)
3150 {
3151 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3152
3153 if (!iwl_is_ready_rf(priv))
3154 return sprintf(buf, "off\n");
3155 else
3156 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3157 }
3158
3159 static ssize_t store_tx_power(struct device *d,
3160 struct device_attribute *attr,
3161 const char *buf, size_t count)
3162 {
3163 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3164 unsigned long val;
3165 int ret;
3166
3167 ret = strict_strtoul(buf, 10, &val);
3168 if (ret)
3169 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3170 else
3171 iwl_set_tx_power(priv, val, false);
3172
3173 return count;
3174 }
3175
3176 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3177
3178 static ssize_t show_flags(struct device *d,
3179 struct device_attribute *attr, char *buf)
3180 {
3181 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3182
3183 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3184 }
3185
3186 static ssize_t store_flags(struct device *d,
3187 struct device_attribute *attr,
3188 const char *buf, size_t count)
3189 {
3190 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3191 unsigned long val;
3192 u32 flags;
3193 int ret = strict_strtoul(buf, 0, &val);
3194 if (ret)
3195 return ret;
3196 flags = (u32)val;
3197
3198 mutex_lock(&priv->mutex);
3199 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3200 /* Cancel any currently running scans... */
3201 if (iwl_scan_cancel_timeout(priv, 100))
3202 IWL_WARN(priv, "Could not cancel scan.\n");
3203 else {
3204 IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3205 priv->staging_rxon.flags = cpu_to_le32(flags);
3206 iwl_commit_rxon(priv);
3207 }
3208 }
3209 mutex_unlock(&priv->mutex);
3210
3211 return count;
3212 }
3213
3214 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3215
3216 static ssize_t show_filter_flags(struct device *d,
3217 struct device_attribute *attr, char *buf)
3218 {
3219 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3220
3221 return sprintf(buf, "0x%04X\n",
3222 le32_to_cpu(priv->active_rxon.filter_flags));
3223 }
3224
3225 static ssize_t store_filter_flags(struct device *d,
3226 struct device_attribute *attr,
3227 const char *buf, size_t count)
3228 {
3229 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3230 unsigned long val;
3231 u32 filter_flags;
3232 int ret = strict_strtoul(buf, 0, &val);
3233 if (ret)
3234 return ret;
3235 filter_flags = (u32)val;
3236
3237 mutex_lock(&priv->mutex);
3238 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3239 /* Cancel any currently running scans... */
3240 if (iwl_scan_cancel_timeout(priv, 100))
3241 IWL_WARN(priv, "Could not cancel scan.\n");
3242 else {
3243 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3244 "0x%04X\n", filter_flags);
3245 priv->staging_rxon.filter_flags =
3246 cpu_to_le32(filter_flags);
3247 iwl_commit_rxon(priv);
3248 }
3249 }
3250 mutex_unlock(&priv->mutex);
3251
3252 return count;
3253 }
3254
3255 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3256 store_filter_flags);
3257
3258 static ssize_t store_power_level(struct device *d,
3259 struct device_attribute *attr,
3260 const char *buf, size_t count)
3261 {
3262 struct iwl_priv *priv = dev_get_drvdata(d);
3263 int ret;
3264 unsigned long mode;
3265
3266
3267 mutex_lock(&priv->mutex);
3268
3269 if (!iwl_is_ready(priv)) {
3270 ret = -EAGAIN;
3271 goto out;
3272 }
3273
3274 ret = strict_strtoul(buf, 10, &mode);
3275 if (ret)
3276 goto out;
3277
3278 ret = iwl_power_set_user_mode(priv, mode);
3279 if (ret) {
3280 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3281 goto out;
3282 }
3283 ret = count;
3284
3285 out:
3286 mutex_unlock(&priv->mutex);
3287 return ret;
3288 }
3289
3290 static ssize_t show_power_level(struct device *d,
3291 struct device_attribute *attr, char *buf)
3292 {
3293 struct iwl_priv *priv = dev_get_drvdata(d);
3294 int mode = priv->power_data.user_power_setting;
3295 int system = priv->power_data.system_power_setting;
3296 int level = priv->power_data.power_mode;
3297 char *p = buf;
3298
3299 switch (system) {
3300 case IWL_POWER_SYS_AUTO:
3301 p += sprintf(p, "SYSTEM:auto");
3302 break;
3303 case IWL_POWER_SYS_AC:
3304 p += sprintf(p, "SYSTEM:ac");
3305 break;
3306 case IWL_POWER_SYS_BATTERY:
3307 p += sprintf(p, "SYSTEM:battery");
3308 break;
3309 }
3310
3311 p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3312 "fixed" : "auto");
3313 p += sprintf(p, "\tINDEX:%d", level);
3314 p += sprintf(p, "\n");
3315 return p - buf + 1;
3316 }
3317
3318 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3319 store_power_level);
3320
3321
3322 static ssize_t show_statistics(struct device *d,
3323 struct device_attribute *attr, char *buf)
3324 {
3325 struct iwl_priv *priv = dev_get_drvdata(d);
3326 u32 size = sizeof(struct iwl_notif_statistics);
3327 u32 len = 0, ofs = 0;
3328 u8 *data = (u8 *)&priv->statistics;
3329 int rc = 0;
3330
3331 if (!iwl_is_alive(priv))
3332 return -EAGAIN;
3333
3334 mutex_lock(&priv->mutex);
3335 rc = iwl_send_statistics_request(priv, 0);
3336 mutex_unlock(&priv->mutex);
3337
3338 if (rc) {
3339 len = sprintf(buf,
3340 "Error sending statistics request: 0x%08X\n", rc);
3341 return len;
3342 }
3343
3344 while (size && (PAGE_SIZE - len)) {
3345 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3346 PAGE_SIZE - len, 1);
3347 len = strlen(buf);
3348 if (PAGE_SIZE - len)
3349 buf[len++] = '\n';
3350
3351 ofs += 16;
3352 size -= min(size, 16U);
3353 }
3354
3355 return len;
3356 }
3357
3358 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3359
3360
3361 /*****************************************************************************
3362 *
3363 * driver setup and teardown
3364 *
3365 *****************************************************************************/
3366
3367 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3368 {
3369 priv->workqueue = create_workqueue(DRV_NAME);
3370
3371 init_waitqueue_head(&priv->wait_command_queue);
3372
3373 INIT_WORK(&priv->up, iwl_bg_up);
3374 INIT_WORK(&priv->restart, iwl_bg_restart);
3375 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3376 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3377 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3378 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3379 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3380 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3381
3382 iwl_setup_scan_deferred_work(priv);
3383 iwl_setup_power_deferred_work(priv);
3384
3385 if (priv->cfg->ops->lib->setup_deferred_work)
3386 priv->cfg->ops->lib->setup_deferred_work(priv);
3387
3388 init_timer(&priv->statistics_periodic);
3389 priv->statistics_periodic.data = (unsigned long)priv;
3390 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3391
3392 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3393 iwl_irq_tasklet, (unsigned long)priv);
3394 }
3395
3396 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3397 {
3398 if (priv->cfg->ops->lib->cancel_deferred_work)
3399 priv->cfg->ops->lib->cancel_deferred_work(priv);
3400
3401 cancel_delayed_work_sync(&priv->init_alive_start);
3402 cancel_delayed_work(&priv->scan_check);
3403 cancel_delayed_work_sync(&priv->set_power_save);
3404 cancel_delayed_work(&priv->alive_start);
3405 cancel_work_sync(&priv->beacon_update);
3406 del_timer_sync(&priv->statistics_periodic);
3407 }
3408
3409 static struct attribute *iwl_sysfs_entries[] = {
3410 &dev_attr_flags.attr,
3411 &dev_attr_filter_flags.attr,
3412 &dev_attr_power_level.attr,
3413 &dev_attr_statistics.attr,
3414 &dev_attr_temperature.attr,
3415 &dev_attr_tx_power.attr,
3416 #ifdef CONFIG_IWLWIFI_DEBUG
3417 &dev_attr_debug_level.attr,
3418 #endif
3419 &dev_attr_version.attr,
3420
3421 NULL
3422 };
3423
3424 static struct attribute_group iwl_attribute_group = {
3425 .name = NULL, /* put in device directory */
3426 .attrs = iwl_sysfs_entries,
3427 };
3428
3429 static struct ieee80211_ops iwl_hw_ops = {
3430 .tx = iwl_mac_tx,
3431 .start = iwl_mac_start,
3432 .stop = iwl_mac_stop,
3433 .add_interface = iwl_mac_add_interface,
3434 .remove_interface = iwl_mac_remove_interface,
3435 .config = iwl_mac_config,
3436 .config_interface = iwl_mac_config_interface,
3437 .configure_filter = iwl_configure_filter,
3438 .set_key = iwl_mac_set_key,
3439 .update_tkip_key = iwl_mac_update_tkip_key,
3440 .get_stats = iwl_mac_get_stats,
3441 .get_tx_stats = iwl_mac_get_tx_stats,
3442 .conf_tx = iwl_mac_conf_tx,
3443 .reset_tsf = iwl_mac_reset_tsf,
3444 .bss_info_changed = iwl_bss_info_changed,
3445 .ampdu_action = iwl_mac_ampdu_action,
3446 .hw_scan = iwl_mac_hw_scan
3447 };
3448
3449 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3450 {
3451 int err = 0;
3452 struct iwl_priv *priv;
3453 struct ieee80211_hw *hw;
3454 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3455 unsigned long flags;
3456 u16 pci_cmd;
3457
3458 /************************
3459 * 1. Allocating HW data
3460 ************************/
3461
3462 /* Disabling hardware scan means that mac80211 will perform scans
3463 * "the hard way", rather than using device's scan. */
3464 if (cfg->mod_params->disable_hw_scan) {
3465 if (cfg->mod_params->debug & IWL_DL_INFO)
3466 dev_printk(KERN_DEBUG, &(pdev->dev),
3467 "Disabling hw_scan\n");
3468 iwl_hw_ops.hw_scan = NULL;
3469 }
3470
3471 hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3472 if (!hw) {
3473 err = -ENOMEM;
3474 goto out;
3475 }
3476 priv = hw->priv;
3477 /* At this point both hw and priv are allocated. */
3478
3479 SET_IEEE80211_DEV(hw, &pdev->dev);
3480
3481 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3482 priv->cfg = cfg;
3483 priv->pci_dev = pdev;
3484
3485 #ifdef CONFIG_IWLWIFI_DEBUG
3486 priv->debug_level = priv->cfg->mod_params->debug;
3487 atomic_set(&priv->restrict_refcnt, 0);
3488 #endif
3489
3490 /**************************
3491 * 2. Initializing PCI bus
3492 **************************/
3493 if (pci_enable_device(pdev)) {
3494 err = -ENODEV;
3495 goto out_ieee80211_free_hw;
3496 }
3497
3498 pci_set_master(pdev);
3499
3500 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3501 if (!err)
3502 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3503 if (err) {
3504 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3505 if (!err)
3506 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3507 /* both attempts failed: */
3508 if (err) {
3509 IWL_WARN(priv, "No suitable DMA available.\n");
3510 goto out_pci_disable_device;
3511 }
3512 }
3513
3514 err = pci_request_regions(pdev, DRV_NAME);
3515 if (err)
3516 goto out_pci_disable_device;
3517
3518 pci_set_drvdata(pdev, priv);
3519
3520
3521 /***********************
3522 * 3. Read REV register
3523 ***********************/
3524 priv->hw_base = pci_iomap(pdev, 0, 0);
3525 if (!priv->hw_base) {
3526 err = -ENODEV;
3527 goto out_pci_release_regions;
3528 }
3529
3530 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3531 (unsigned long long) pci_resource_len(pdev, 0));
3532 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3533
3534 iwl_hw_detect(priv);
3535 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3536 priv->cfg->name, priv->hw_rev);
3537
3538 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3539 * PCI Tx retries from interfering with C3 CPU state */
3540 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3541
3542 /* amp init */
3543 err = priv->cfg->ops->lib->apm_ops.init(priv);
3544 if (err < 0) {
3545 IWL_DEBUG_INFO(priv, "Failed to init APMG\n");
3546 goto out_iounmap;
3547 }
3548 /*****************
3549 * 4. Read EEPROM
3550 *****************/
3551 /* Read the EEPROM */
3552 err = iwl_eeprom_init(priv);
3553 if (err) {
3554 IWL_ERR(priv, "Unable to init EEPROM\n");
3555 goto out_iounmap;
3556 }
3557 err = iwl_eeprom_check_version(priv);
3558 if (err)
3559 goto out_iounmap;
3560
3561 /* extract MAC Address */
3562 iwl_eeprom_get_mac(priv, priv->mac_addr);
3563 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3564 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3565
3566 /************************
3567 * 5. Setup HW constants
3568 ************************/
3569 if (iwl_set_hw_params(priv)) {
3570 IWL_ERR(priv, "failed to set hw parameters\n");
3571 goto out_free_eeprom;
3572 }
3573
3574 /*******************
3575 * 6. Setup priv
3576 *******************/
3577
3578 err = iwl_init_drv(priv);
3579 if (err)
3580 goto out_free_eeprom;
3581 /* At this point both hw and priv are initialized. */
3582
3583 /**********************************
3584 * 7. Initialize module parameters
3585 **********************************/
3586
3587 /* Disable radio (SW RF KILL) via parameter when loading driver */
3588 if (priv->cfg->mod_params->disable) {
3589 set_bit(STATUS_RF_KILL_SW, &priv->status);
3590 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3591 }
3592
3593 /********************
3594 * 8. Setup services
3595 ********************/
3596 spin_lock_irqsave(&priv->lock, flags);
3597 iwl_disable_interrupts(priv);
3598 spin_unlock_irqrestore(&priv->lock, flags);
3599
3600 pci_enable_msi(priv->pci_dev);
3601
3602 err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3603 DRV_NAME, priv);
3604 if (err) {
3605 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3606 goto out_disable_msi;
3607 }
3608 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3609 if (err) {
3610 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3611 goto out_uninit_drv;
3612 }
3613
3614 iwl_setup_deferred_work(priv);
3615 iwl_setup_rx_handlers(priv);
3616
3617 /**********************************
3618 * 9. Setup and register mac80211
3619 **********************************/
3620
3621 /* enable interrupts if needed: hw bug w/a */
3622 pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3623 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3624 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3625 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3626 }
3627
3628 iwl_enable_interrupts(priv);
3629
3630 err = iwl_setup_mac(priv);
3631 if (err)
3632 goto out_remove_sysfs;
3633
3634 err = iwl_dbgfs_register(priv, DRV_NAME);
3635 if (err)
3636 IWL_ERR(priv, "failed to create debugfs files\n");
3637
3638 /* If platform's RF_KILL switch is NOT set to KILL */
3639 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3640 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3641 else
3642 set_bit(STATUS_RF_KILL_HW, &priv->status);
3643
3644 err = iwl_rfkill_init(priv);
3645 if (err)
3646 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3647 "Ignoring error: %d\n", err);
3648 else
3649 iwl_rfkill_set_hw_state(priv);
3650
3651 iwl_power_initialize(priv);
3652 return 0;
3653
3654 out_remove_sysfs:
3655 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3656 out_disable_msi:
3657 pci_disable_msi(priv->pci_dev);
3658 pci_disable_device(priv->pci_dev);
3659 out_uninit_drv:
3660 iwl_uninit_drv(priv);
3661 out_free_eeprom:
3662 iwl_eeprom_free(priv);
3663 out_iounmap:
3664 pci_iounmap(pdev, priv->hw_base);
3665 out_pci_release_regions:
3666 pci_release_regions(pdev);
3667 pci_set_drvdata(pdev, NULL);
3668 out_pci_disable_device:
3669 pci_disable_device(pdev);
3670 out_ieee80211_free_hw:
3671 ieee80211_free_hw(priv->hw);
3672 out:
3673 return err;
3674 }
3675
3676 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3677 {
3678 struct iwl_priv *priv = pci_get_drvdata(pdev);
3679 unsigned long flags;
3680
3681 if (!priv)
3682 return;
3683
3684 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3685
3686 iwl_dbgfs_unregister(priv);
3687 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3688
3689 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3690 * to be called and iwl_down since we are removing the device
3691 * we need to set STATUS_EXIT_PENDING bit.
3692 */
3693 set_bit(STATUS_EXIT_PENDING, &priv->status);
3694 if (priv->mac80211_registered) {
3695 ieee80211_unregister_hw(priv->hw);
3696 priv->mac80211_registered = 0;
3697 } else {
3698 iwl_down(priv);
3699 }
3700
3701 /* make sure we flush any pending irq or
3702 * tasklet for the driver
3703 */
3704 spin_lock_irqsave(&priv->lock, flags);
3705 iwl_disable_interrupts(priv);
3706 spin_unlock_irqrestore(&priv->lock, flags);
3707
3708 iwl_synchronize_irq(priv);
3709
3710 iwl_rfkill_unregister(priv);
3711 iwl_dealloc_ucode_pci(priv);
3712
3713 if (priv->rxq.bd)
3714 iwl_rx_queue_free(priv, &priv->rxq);
3715 iwl_hw_txq_ctx_free(priv);
3716
3717 iwl_clear_stations_table(priv);
3718 iwl_eeprom_free(priv);
3719
3720
3721 /*netif_stop_queue(dev); */
3722 flush_workqueue(priv->workqueue);
3723
3724 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3725 * priv->workqueue... so we can't take down the workqueue
3726 * until now... */
3727 destroy_workqueue(priv->workqueue);
3728 priv->workqueue = NULL;
3729
3730 free_irq(priv->pci_dev->irq, priv);
3731 pci_disable_msi(priv->pci_dev);
3732 pci_iounmap(pdev, priv->hw_base);
3733 pci_release_regions(pdev);
3734 pci_disable_device(pdev);
3735 pci_set_drvdata(pdev, NULL);
3736
3737 iwl_uninit_drv(priv);
3738
3739 if (priv->ibss_beacon)
3740 dev_kfree_skb(priv->ibss_beacon);
3741
3742 ieee80211_free_hw(priv->hw);
3743 }
3744
3745 #ifdef CONFIG_PM
3746
3747 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3748 {
3749 struct iwl_priv *priv = pci_get_drvdata(pdev);
3750
3751 if (priv->is_open) {
3752 set_bit(STATUS_IN_SUSPEND, &priv->status);
3753 iwl_mac_stop(priv->hw);
3754 priv->is_open = 1;
3755 }
3756
3757 pci_save_state(pdev);
3758 pci_disable_device(pdev);
3759 pci_set_power_state(pdev, PCI_D3hot);
3760
3761 return 0;
3762 }
3763
3764 static int iwl_pci_resume(struct pci_dev *pdev)
3765 {
3766 struct iwl_priv *priv = pci_get_drvdata(pdev);
3767 int ret;
3768
3769 pci_set_power_state(pdev, PCI_D0);
3770 ret = pci_enable_device(pdev);
3771 if (ret)
3772 return ret;
3773 pci_restore_state(pdev);
3774 iwl_enable_interrupts(priv);
3775
3776 if (priv->is_open)
3777 iwl_mac_start(priv->hw);
3778
3779 clear_bit(STATUS_IN_SUSPEND, &priv->status);
3780 return 0;
3781 }
3782
3783 #endif /* CONFIG_PM */
3784
3785 /*****************************************************************************
3786 *
3787 * driver and module entry point
3788 *
3789 *****************************************************************************/
3790
3791 /* Hardware specific file defines the PCI IDs table for that hardware module */
3792 static struct pci_device_id iwl_hw_card_ids[] = {
3793 #ifdef CONFIG_IWL4965
3794 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3795 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3796 #endif /* CONFIG_IWL4965 */
3797 #ifdef CONFIG_IWL5000
3798 {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3799 {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3800 {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3801 {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3802 {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3803 {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3804 {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3805 {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3806 {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3807 {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3808 /* 5350 WiFi/WiMax */
3809 {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3810 {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3811 {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3812 /* 5150 Wifi/WiMax */
3813 {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3814 {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3815 /* 6000/6050 Series */
3816 {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3817 {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3818 {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3819 {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3820 {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3821 {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3822 {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3823 {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3824 {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3825 {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3826 {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3827 /* 100 Series WiFi */
3828 {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl100_bgn_cfg)},
3829 {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl100_bgn_cfg)},
3830 #endif /* CONFIG_IWL5000 */
3831
3832 {0}
3833 };
3834 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3835
3836 static struct pci_driver iwl_driver = {
3837 .name = DRV_NAME,
3838 .id_table = iwl_hw_card_ids,
3839 .probe = iwl_pci_probe,
3840 .remove = __devexit_p(iwl_pci_remove),
3841 #ifdef CONFIG_PM
3842 .suspend = iwl_pci_suspend,
3843 .resume = iwl_pci_resume,
3844 #endif
3845 };
3846
3847 static int __init iwl_init(void)
3848 {
3849
3850 int ret;
3851 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3852 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3853
3854 ret = iwlagn_rate_control_register();
3855 if (ret) {
3856 printk(KERN_ERR DRV_NAME
3857 "Unable to register rate control algorithm: %d\n", ret);
3858 return ret;
3859 }
3860
3861 ret = pci_register_driver(&iwl_driver);
3862 if (ret) {
3863 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3864 goto error_register;
3865 }
3866
3867 return ret;
3868
3869 error_register:
3870 iwlagn_rate_control_unregister();
3871 return ret;
3872 }
3873
3874 static void __exit iwl_exit(void)
3875 {
3876 pci_unregister_driver(&iwl_driver);
3877 iwlagn_rate_control_unregister();
3878 }
3879
3880 module_exit(iwl_exit);
3881 module_init(iwl_init);
Linux kernel - Deliverables
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