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iwl3945: use iwl_bss_info_changed
[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_IWLWIFI_SPECTRUM_MEASUREMENT
76 #define VS "s"
77 #else
78 #define VS
79 #endif
80
81 #define DRV_VERSION IWLWIFI_VERSION VD VS
82
83
84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
85 MODULE_VERSION(DRV_VERSION);
86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
87 MODULE_LICENSE("GPL");
88 MODULE_ALIAS("iwl4965");
89
90 /*************** STATION TABLE MANAGEMENT ****
91 * mac80211 should be examined to determine if sta_info is duplicating
92 * the functionality provided here
93 */
94
95 /**************************************************************/
96
97 /**
98 * iwl_commit_rxon - commit staging_rxon to hardware
99 *
100 * The RXON command in staging_rxon is committed to the hardware and
101 * the active_rxon structure is updated with the new data. This
102 * function correctly transitions out of the RXON_ASSOC_MSK state if
103 * a HW tune is required based on the RXON structure changes.
104 */
105 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_BIDIRECTIONAL);
448
449 /* Unmap chunks, if any. */
450 for (i = 1; i < num_tbs; i++) {
451 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
452 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
453
454 if (txq->txb) {
455 dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
456 txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
457 }
458 }
459 }
460
461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
462 struct iwl_tx_queue *txq,
463 dma_addr_t addr, u16 len,
464 u8 reset, u8 pad)
465 {
466 struct iwl_queue *q;
467 struct iwl_tfd *tfd, *tfd_tmp;
468 u32 num_tbs;
469
470 q = &txq->q;
471 tfd_tmp = (struct iwl_tfd *)txq->tfds;
472 tfd = &tfd_tmp[q->write_ptr];
473
474 if (reset)
475 memset(tfd, 0, sizeof(*tfd));
476
477 num_tbs = iwl_tfd_get_num_tbs(tfd);
478
479 /* Each TFD can point to a maximum 20 Tx buffers */
480 if (num_tbs >= IWL_NUM_OF_TBS) {
481 IWL_ERR(priv, "Error can not send more than %d chunks\n",
482 IWL_NUM_OF_TBS);
483 return -EINVAL;
484 }
485
486 BUG_ON(addr & ~DMA_BIT_MASK(36));
487 if (unlikely(addr & ~IWL_TX_DMA_MASK))
488 IWL_ERR(priv, "Unaligned address = %llx\n",
489 (unsigned long long)addr);
490
491 iwl_tfd_set_tb(tfd, num_tbs, addr, len);
492
493 return 0;
494 }
495
496 /*
497 * Tell nic where to find circular buffer of Tx Frame Descriptors for
498 * given Tx queue, and enable the DMA channel used for that queue.
499 *
500 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
501 * channels supported in hardware.
502 */
503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
504 struct iwl_tx_queue *txq)
505 {
506 int 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 #define MAX_UCODE_BEACON_INTERVAL 4096
535
536 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
537 {
538 u16 new_val = 0;
539 u16 beacon_factor = 0;
540
541 beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
542 / MAX_UCODE_BEACON_INTERVAL;
543 new_val = beacon_val / beacon_factor;
544
545 if (!new_val)
546 new_val = MAX_UCODE_BEACON_INTERVAL;
547
548 return new_val;
549 }
550
551 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
552 {
553 u64 tsf;
554 s32 interval_tm, rem;
555 unsigned long flags;
556 struct ieee80211_conf *conf = NULL;
557 u16 beacon_int = 0;
558
559 conf = ieee80211_get_hw_conf(priv->hw);
560
561 spin_lock_irqsave(&priv->lock, flags);
562 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
563 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
564
565 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
566 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
567 priv->rxon_timing.atim_window = 0;
568 } else {
569 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
570
571 /* TODO: we need to get atim_window from upper stack
572 * for now we set to 0 */
573 priv->rxon_timing.atim_window = 0;
574 }
575
576 priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
577
578 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
579 interval_tm = beacon_int * 1024;
580 rem = do_div(tsf, interval_tm);
581 priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
582
583 spin_unlock_irqrestore(&priv->lock, flags);
584 IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
585 le16_to_cpu(priv->rxon_timing.beacon_interval),
586 le32_to_cpu(priv->rxon_timing.beacon_init_val),
587 le16_to_cpu(priv->rxon_timing.atim_window));
588 }
589
590 static int iwl_set_mode(struct iwl_priv *priv, int mode)
591 {
592 iwl_connection_init_rx_config(priv, mode);
593 iwl_set_rxon_chain(priv);
594 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
595
596 iwl_clear_stations_table(priv);
597
598 /* dont commit rxon if rf-kill is on*/
599 if (!iwl_is_ready_rf(priv))
600 return -EAGAIN;
601
602 cancel_delayed_work(&priv->scan_check);
603 if (iwl_scan_cancel_timeout(priv, 100)) {
604 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
605 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
606 return -EAGAIN;
607 }
608
609 iwl_commit_rxon(priv);
610
611 return 0;
612 }
613
614 /******************************************************************************
615 *
616 * Generic RX handler implementations
617 *
618 ******************************************************************************/
619 static void iwl_rx_reply_alive(struct iwl_priv *priv,
620 struct iwl_rx_mem_buffer *rxb)
621 {
622 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
623 struct iwl_alive_resp *palive;
624 struct delayed_work *pwork;
625
626 palive = &pkt->u.alive_frame;
627
628 IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
629 "0x%01X 0x%01X\n",
630 palive->is_valid, palive->ver_type,
631 palive->ver_subtype);
632
633 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
634 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
635 memcpy(&priv->card_alive_init,
636 &pkt->u.alive_frame,
637 sizeof(struct iwl_init_alive_resp));
638 pwork = &priv->init_alive_start;
639 } else {
640 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
641 memcpy(&priv->card_alive, &pkt->u.alive_frame,
642 sizeof(struct iwl_alive_resp));
643 pwork = &priv->alive_start;
644 }
645
646 /* We delay the ALIVE response by 5ms to
647 * give the HW RF Kill time to activate... */
648 if (palive->is_valid == UCODE_VALID_OK)
649 queue_delayed_work(priv->workqueue, pwork,
650 msecs_to_jiffies(5));
651 else
652 IWL_WARN(priv, "uCode did not respond OK.\n");
653 }
654
655 static void iwl_bg_beacon_update(struct work_struct *work)
656 {
657 struct iwl_priv *priv =
658 container_of(work, struct iwl_priv, beacon_update);
659 struct sk_buff *beacon;
660
661 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
662 beacon = ieee80211_beacon_get(priv->hw, priv->vif);
663
664 if (!beacon) {
665 IWL_ERR(priv, "update beacon failed\n");
666 return;
667 }
668
669 mutex_lock(&priv->mutex);
670 /* new beacon skb is allocated every time; dispose previous.*/
671 if (priv->ibss_beacon)
672 dev_kfree_skb(priv->ibss_beacon);
673
674 priv->ibss_beacon = beacon;
675 mutex_unlock(&priv->mutex);
676
677 iwl_send_beacon_cmd(priv);
678 }
679
680 /**
681 * iwl_bg_statistics_periodic - Timer callback to queue statistics
682 *
683 * This callback is provided in order to send a statistics request.
684 *
685 * This timer function is continually reset to execute within
686 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
687 * was received. We need to ensure we receive the statistics in order
688 * to update the temperature used for calibrating the TXPOWER.
689 */
690 static void iwl_bg_statistics_periodic(unsigned long data)
691 {
692 struct iwl_priv *priv = (struct iwl_priv *)data;
693
694 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
695 return;
696
697 /* dont send host command if rf-kill is on */
698 if (!iwl_is_ready_rf(priv))
699 return;
700
701 iwl_send_statistics_request(priv, CMD_ASYNC);
702 }
703
704 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
705 struct iwl_rx_mem_buffer *rxb)
706 {
707 #ifdef CONFIG_IWLWIFI_DEBUG
708 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
709 struct iwl4965_beacon_notif *beacon =
710 (struct iwl4965_beacon_notif *)pkt->u.raw;
711 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
712
713 IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
714 "tsf %d %d rate %d\n",
715 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
716 beacon->beacon_notify_hdr.failure_frame,
717 le32_to_cpu(beacon->ibss_mgr_status),
718 le32_to_cpu(beacon->high_tsf),
719 le32_to_cpu(beacon->low_tsf), rate);
720 #endif
721
722 if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
723 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
724 queue_work(priv->workqueue, &priv->beacon_update);
725 }
726
727 /* Handle notification from uCode that card's power state is changing
728 * due to software, hardware, or critical temperature RFKILL */
729 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
730 struct iwl_rx_mem_buffer *rxb)
731 {
732 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
733 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
734 unsigned long status = priv->status;
735
736 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
737 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
738 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
739
740 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
741 RF_CARD_DISABLED)) {
742
743 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
744 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
745
746 if (!iwl_grab_nic_access(priv)) {
747 iwl_write_direct32(
748 priv, HBUS_TARG_MBX_C,
749 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
750
751 iwl_release_nic_access(priv);
752 }
753
754 if (!(flags & RXON_CARD_DISABLED)) {
755 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
756 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
757 if (!iwl_grab_nic_access(priv)) {
758 iwl_write_direct32(
759 priv, HBUS_TARG_MBX_C,
760 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
761
762 iwl_release_nic_access(priv);
763 }
764 }
765
766 if (flags & RF_CARD_DISABLED) {
767 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
768 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
769 iwl_read32(priv, CSR_UCODE_DRV_GP1);
770 if (!iwl_grab_nic_access(priv))
771 iwl_release_nic_access(priv);
772 }
773 }
774
775 if (flags & HW_CARD_DISABLED)
776 set_bit(STATUS_RF_KILL_HW, &priv->status);
777 else
778 clear_bit(STATUS_RF_KILL_HW, &priv->status);
779
780
781 if (flags & SW_CARD_DISABLED)
782 set_bit(STATUS_RF_KILL_SW, &priv->status);
783 else
784 clear_bit(STATUS_RF_KILL_SW, &priv->status);
785
786 if (!(flags & RXON_CARD_DISABLED))
787 iwl_scan_cancel(priv);
788
789 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
790 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
791 (test_bit(STATUS_RF_KILL_SW, &status) !=
792 test_bit(STATUS_RF_KILL_SW, &priv->status)))
793 queue_work(priv->workqueue, &priv->rf_kill);
794 else
795 wake_up_interruptible(&priv->wait_command_queue);
796 }
797
798 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
799 {
800 int ret;
801 unsigned long flags;
802
803 spin_lock_irqsave(&priv->lock, flags);
804 ret = iwl_grab_nic_access(priv);
805 if (ret)
806 goto err;
807
808 if (src == IWL_PWR_SRC_VAUX) {
809 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
810 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
811 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
812 ~APMG_PS_CTRL_MSK_PWR_SRC);
813 } else {
814 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
815 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
816 ~APMG_PS_CTRL_MSK_PWR_SRC);
817 }
818
819 iwl_release_nic_access(priv);
820 err:
821 spin_unlock_irqrestore(&priv->lock, flags);
822 return ret;
823 }
824
825 /**
826 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
827 *
828 * Setup the RX handlers for each of the reply types sent from the uCode
829 * to the host.
830 *
831 * This function chains into the hardware specific files for them to setup
832 * any hardware specific handlers as well.
833 */
834 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
835 {
836 priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
837 priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
838 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
839 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
840 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
841 iwl_rx_pm_debug_statistics_notif;
842 priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
843
844 /*
845 * The same handler is used for both the REPLY to a discrete
846 * statistics request from the host as well as for the periodic
847 * statistics notifications (after received beacons) from the uCode.
848 */
849 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
850 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
851
852 iwl_setup_spectrum_handlers(priv);
853 iwl_setup_rx_scan_handlers(priv);
854
855 /* status change handler */
856 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
857
858 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
859 iwl_rx_missed_beacon_notif;
860 /* Rx handlers */
861 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
862 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
863 /* block ack */
864 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
865 /* Set up hardware specific Rx handlers */
866 priv->cfg->ops->lib->rx_handler_setup(priv);
867 }
868
869 /**
870 * iwl_rx_handle - Main entry function for receiving responses from uCode
871 *
872 * Uses the priv->rx_handlers callback function array to invoke
873 * the appropriate handlers, including command responses,
874 * frame-received notifications, and other notifications.
875 */
876 void iwl_rx_handle(struct iwl_priv *priv)
877 {
878 struct iwl_rx_mem_buffer *rxb;
879 struct iwl_rx_packet *pkt;
880 struct iwl_rx_queue *rxq = &priv->rxq;
881 u32 r, i;
882 int reclaim;
883 unsigned long flags;
884 u8 fill_rx = 0;
885 u32 count = 8;
886
887 /* uCode's read index (stored in shared DRAM) indicates the last Rx
888 * buffer that the driver may process (last buffer filled by ucode). */
889 r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
890 i = rxq->read;
891
892 /* Rx interrupt, but nothing sent from uCode */
893 if (i == r)
894 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
895
896 if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
897 fill_rx = 1;
898
899 while (i != r) {
900 rxb = rxq->queue[i];
901
902 /* If an RXB doesn't have a Rx queue slot associated with it,
903 * then a bug has been introduced in the queue refilling
904 * routines -- catch it here */
905 BUG_ON(rxb == NULL);
906
907 rxq->queue[i] = NULL;
908
909 dma_sync_single_range_for_cpu(
910 &priv->pci_dev->dev, rxb->real_dma_addr,
911 rxb->aligned_dma_addr - rxb->real_dma_addr,
912 priv->hw_params.rx_buf_size,
913 PCI_DMA_FROMDEVICE);
914 pkt = (struct iwl_rx_packet *)rxb->skb->data;
915
916 /* Reclaim a command buffer only if this packet is a response
917 * to a (driver-originated) command.
918 * If the packet (e.g. Rx frame) originated from uCode,
919 * there is no command buffer to reclaim.
920 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
921 * but apparently a few don't get set; catch them here. */
922 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
923 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
924 (pkt->hdr.cmd != REPLY_RX) &&
925 (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
926 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
927 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
928 (pkt->hdr.cmd != REPLY_TX);
929
930 /* Based on type of command response or notification,
931 * handle those that need handling via function in
932 * rx_handlers table. See iwl_setup_rx_handlers() */
933 if (priv->rx_handlers[pkt->hdr.cmd]) {
934 IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
935 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
936 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
937 } else {
938 /* No handling needed */
939 IWL_DEBUG_RX(priv,
940 "r %d i %d No handler needed for %s, 0x%02x\n",
941 r, i, get_cmd_string(pkt->hdr.cmd),
942 pkt->hdr.cmd);
943 }
944
945 if (reclaim) {
946 /* Invoke any callbacks, transfer the skb to caller, and
947 * fire off the (possibly) blocking iwl_send_cmd()
948 * as we reclaim the driver command queue */
949 if (rxb && rxb->skb)
950 iwl_tx_cmd_complete(priv, rxb);
951 else
952 IWL_WARN(priv, "Claim null rxb?\n");
953 }
954
955 /* For now we just don't re-use anything. We can tweak this
956 * later to try and re-use notification packets and SKBs that
957 * fail to Rx correctly */
958 if (rxb->skb != NULL) {
959 priv->alloc_rxb_skb--;
960 dev_kfree_skb_any(rxb->skb);
961 rxb->skb = NULL;
962 }
963
964 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
965 priv->hw_params.rx_buf_size + 256,
966 PCI_DMA_FROMDEVICE);
967 spin_lock_irqsave(&rxq->lock, flags);
968 list_add_tail(&rxb->list, &priv->rxq.rx_used);
969 spin_unlock_irqrestore(&rxq->lock, flags);
970 i = (i + 1) & RX_QUEUE_MASK;
971 /* If there are a lot of unused frames,
972 * restock the Rx queue so ucode wont assert. */
973 if (fill_rx) {
974 count++;
975 if (count >= 8) {
976 priv->rxq.read = i;
977 iwl_rx_queue_restock(priv);
978 count = 0;
979 }
980 }
981 }
982
983 /* Backtrack one entry */
984 priv->rxq.read = i;
985 iwl_rx_queue_restock(priv);
986 }
987
988 /* call this function to flush any scheduled tasklet */
989 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
990 {
991 /* wait to make sure we flush pending tasklet*/
992 synchronize_irq(priv->pci_dev->irq);
993 tasklet_kill(&priv->irq_tasklet);
994 }
995
996 static void iwl_error_recovery(struct iwl_priv *priv)
997 {
998 unsigned long flags;
999
1000 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1001 sizeof(priv->staging_rxon));
1002 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1003 iwl_commit_rxon(priv);
1004
1005 iwl_rxon_add_station(priv, priv->bssid, 1);
1006
1007 spin_lock_irqsave(&priv->lock, flags);
1008 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1009 priv->error_recovering = 0;
1010 spin_unlock_irqrestore(&priv->lock, flags);
1011 }
1012
1013 static void iwl_irq_tasklet(struct iwl_priv *priv)
1014 {
1015 u32 inta, handled = 0;
1016 u32 inta_fh;
1017 unsigned long flags;
1018 #ifdef CONFIG_IWLWIFI_DEBUG
1019 u32 inta_mask;
1020 #endif
1021
1022 spin_lock_irqsave(&priv->lock, flags);
1023
1024 /* Ack/clear/reset pending uCode interrupts.
1025 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1026 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
1027 inta = iwl_read32(priv, CSR_INT);
1028 iwl_write32(priv, CSR_INT, inta);
1029
1030 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1031 * Any new interrupts that happen after this, either while we're
1032 * in this tasklet, or later, will show up in next ISR/tasklet. */
1033 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1034 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1035
1036 #ifdef CONFIG_IWLWIFI_DEBUG
1037 if (priv->debug_level & IWL_DL_ISR) {
1038 /* just for debug */
1039 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1040 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1041 inta, inta_mask, inta_fh);
1042 }
1043 #endif
1044
1045 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1046 * atomic, make sure that inta covers all the interrupts that
1047 * we've discovered, even if FH interrupt came in just after
1048 * reading CSR_INT. */
1049 if (inta_fh & CSR49_FH_INT_RX_MASK)
1050 inta |= CSR_INT_BIT_FH_RX;
1051 if (inta_fh & CSR49_FH_INT_TX_MASK)
1052 inta |= CSR_INT_BIT_FH_TX;
1053
1054 /* Now service all interrupt bits discovered above. */
1055 if (inta & CSR_INT_BIT_HW_ERR) {
1056 IWL_ERR(priv, "Microcode HW error detected. Restarting.\n");
1057
1058 /* Tell the device to stop sending interrupts */
1059 iwl_disable_interrupts(priv);
1060
1061 iwl_irq_handle_error(priv);
1062
1063 handled |= CSR_INT_BIT_HW_ERR;
1064
1065 spin_unlock_irqrestore(&priv->lock, flags);
1066
1067 return;
1068 }
1069
1070 #ifdef CONFIG_IWLWIFI_DEBUG
1071 if (priv->debug_level & (IWL_DL_ISR)) {
1072 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1073 if (inta & CSR_INT_BIT_SCD)
1074 IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1075 "the frame/frames.\n");
1076
1077 /* Alive notification via Rx interrupt will do the real work */
1078 if (inta & CSR_INT_BIT_ALIVE)
1079 IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1080 }
1081 #endif
1082 /* Safely ignore these bits for debug checks below */
1083 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1084
1085 /* HW RF KILL switch toggled */
1086 if (inta & CSR_INT_BIT_RF_KILL) {
1087 int hw_rf_kill = 0;
1088 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1089 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1090 hw_rf_kill = 1;
1091
1092 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1093 hw_rf_kill ? "disable radio" : "enable radio");
1094
1095 /* driver only loads ucode once setting the interface up.
1096 * the driver allows loading the ucode even if the radio
1097 * is killed. Hence update the killswitch state here. The
1098 * rfkill handler will care about restarting if needed.
1099 */
1100 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1101 if (hw_rf_kill)
1102 set_bit(STATUS_RF_KILL_HW, &priv->status);
1103 else
1104 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1105 queue_work(priv->workqueue, &priv->rf_kill);
1106 }
1107
1108 handled |= CSR_INT_BIT_RF_KILL;
1109 }
1110
1111 /* Chip got too hot and stopped itself */
1112 if (inta & CSR_INT_BIT_CT_KILL) {
1113 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1114 handled |= CSR_INT_BIT_CT_KILL;
1115 }
1116
1117 /* Error detected by uCode */
1118 if (inta & CSR_INT_BIT_SW_ERR) {
1119 IWL_ERR(priv, "Microcode SW error detected. "
1120 " Restarting 0x%X.\n", inta);
1121 iwl_irq_handle_error(priv);
1122 handled |= CSR_INT_BIT_SW_ERR;
1123 }
1124
1125 /* uCode wakes up after power-down sleep */
1126 if (inta & CSR_INT_BIT_WAKEUP) {
1127 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1128 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1129 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1130 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1131 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1132 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1133 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1134 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1135
1136 handled |= CSR_INT_BIT_WAKEUP;
1137 }
1138
1139 /* All uCode command responses, including Tx command responses,
1140 * Rx "responses" (frame-received notification), and other
1141 * notifications from uCode come through here*/
1142 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1143 iwl_rx_handle(priv);
1144 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1145 }
1146
1147 if (inta & CSR_INT_BIT_FH_TX) {
1148 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1149 handled |= CSR_INT_BIT_FH_TX;
1150 /* FH finished to write, send event */
1151 priv->ucode_write_complete = 1;
1152 wake_up_interruptible(&priv->wait_command_queue);
1153 }
1154
1155 if (inta & ~handled)
1156 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1157
1158 if (inta & ~CSR_INI_SET_MASK) {
1159 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1160 inta & ~CSR_INI_SET_MASK);
1161 IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
1162 }
1163
1164 /* Re-enable all interrupts */
1165 /* only Re-enable if diabled by irq */
1166 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1167 iwl_enable_interrupts(priv);
1168
1169 #ifdef CONFIG_IWLWIFI_DEBUG
1170 if (priv->debug_level & (IWL_DL_ISR)) {
1171 inta = iwl_read32(priv, CSR_INT);
1172 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1173 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1174 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1175 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1176 }
1177 #endif
1178 spin_unlock_irqrestore(&priv->lock, flags);
1179 }
1180
1181 /******************************************************************************
1182 *
1183 * uCode download functions
1184 *
1185 ******************************************************************************/
1186
1187 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1188 {
1189 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1190 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1191 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1192 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1193 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1194 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1195 }
1196
1197 static void iwl_nic_start(struct iwl_priv *priv)
1198 {
1199 /* Remove all resets to allow NIC to operate */
1200 iwl_write32(priv, CSR_RESET, 0);
1201 }
1202
1203
1204 /**
1205 * iwl_read_ucode - Read uCode images from disk file.
1206 *
1207 * Copy into buffers for card to fetch via bus-mastering
1208 */
1209 static int iwl_read_ucode(struct iwl_priv *priv)
1210 {
1211 struct iwl_ucode *ucode;
1212 int ret = -EINVAL, index;
1213 const struct firmware *ucode_raw;
1214 const char *name_pre = priv->cfg->fw_name_pre;
1215 const unsigned int api_max = priv->cfg->ucode_api_max;
1216 const unsigned int api_min = priv->cfg->ucode_api_min;
1217 char buf[25];
1218 u8 *src;
1219 size_t len;
1220 u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1221
1222 /* Ask kernel firmware_class module to get the boot firmware off disk.
1223 * request_firmware() is synchronous, file is in memory on return. */
1224 for (index = api_max; index >= api_min; index--) {
1225 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1226 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1227 if (ret < 0) {
1228 IWL_ERR(priv, "%s firmware file req failed: %d\n",
1229 buf, ret);
1230 if (ret == -ENOENT)
1231 continue;
1232 else
1233 goto error;
1234 } else {
1235 if (index < api_max)
1236 IWL_ERR(priv, "Loaded firmware %s, "
1237 "which is deprecated. "
1238 "Please use API v%u instead.\n",
1239 buf, api_max);
1240
1241 IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1242 buf, ucode_raw->size);
1243 break;
1244 }
1245 }
1246
1247 if (ret < 0)
1248 goto error;
1249
1250 /* Make sure that we got at least our header! */
1251 if (ucode_raw->size < sizeof(*ucode)) {
1252 IWL_ERR(priv, "File size way too small!\n");
1253 ret = -EINVAL;
1254 goto err_release;
1255 }
1256
1257 /* Data from ucode file: header followed by uCode images */
1258 ucode = (void *)ucode_raw->data;
1259
1260 priv->ucode_ver = le32_to_cpu(ucode->ver);
1261 api_ver = IWL_UCODE_API(priv->ucode_ver);
1262 inst_size = le32_to_cpu(ucode->inst_size);
1263 data_size = le32_to_cpu(ucode->data_size);
1264 init_size = le32_to_cpu(ucode->init_size);
1265 init_data_size = le32_to_cpu(ucode->init_data_size);
1266 boot_size = le32_to_cpu(ucode->boot_size);
1267
1268 /* api_ver should match the api version forming part of the
1269 * firmware filename ... but we don't check for that and only rely
1270 * on the API version read from firmware header from here on forward */
1271
1272 if (api_ver < api_min || api_ver > api_max) {
1273 IWL_ERR(priv, "Driver unable to support your firmware API. "
1274 "Driver supports v%u, firmware is v%u.\n",
1275 api_max, api_ver);
1276 priv->ucode_ver = 0;
1277 ret = -EINVAL;
1278 goto err_release;
1279 }
1280 if (api_ver != api_max)
1281 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1282 "got v%u. New firmware can be obtained "
1283 "from http://www.intellinuxwireless.org.\n",
1284 api_max, api_ver);
1285
1286 IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1287 IWL_UCODE_MAJOR(priv->ucode_ver),
1288 IWL_UCODE_MINOR(priv->ucode_ver),
1289 IWL_UCODE_API(priv->ucode_ver),
1290 IWL_UCODE_SERIAL(priv->ucode_ver));
1291
1292 IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1293 priv->ucode_ver);
1294 IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1295 inst_size);
1296 IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1297 data_size);
1298 IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1299 init_size);
1300 IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1301 init_data_size);
1302 IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1303 boot_size);
1304
1305 /* Verify size of file vs. image size info in file's header */
1306 if (ucode_raw->size < sizeof(*ucode) +
1307 inst_size + data_size + init_size +
1308 init_data_size + boot_size) {
1309
1310 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1311 (int)ucode_raw->size);
1312 ret = -EINVAL;
1313 goto err_release;
1314 }
1315
1316 /* Verify that uCode images will fit in card's SRAM */
1317 if (inst_size > priv->hw_params.max_inst_size) {
1318 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1319 inst_size);
1320 ret = -EINVAL;
1321 goto err_release;
1322 }
1323
1324 if (data_size > priv->hw_params.max_data_size) {
1325 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1326 data_size);
1327 ret = -EINVAL;
1328 goto err_release;
1329 }
1330 if (init_size > priv->hw_params.max_inst_size) {
1331 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1332 init_size);
1333 ret = -EINVAL;
1334 goto err_release;
1335 }
1336 if (init_data_size > priv->hw_params.max_data_size) {
1337 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1338 init_data_size);
1339 ret = -EINVAL;
1340 goto err_release;
1341 }
1342 if (boot_size > priv->hw_params.max_bsm_size) {
1343 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1344 boot_size);
1345 ret = -EINVAL;
1346 goto err_release;
1347 }
1348
1349 /* Allocate ucode buffers for card's bus-master loading ... */
1350
1351 /* Runtime instructions and 2 copies of data:
1352 * 1) unmodified from disk
1353 * 2) backup cache for save/restore during power-downs */
1354 priv->ucode_code.len = inst_size;
1355 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1356
1357 priv->ucode_data.len = data_size;
1358 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1359
1360 priv->ucode_data_backup.len = data_size;
1361 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1362
1363 if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1364 !priv->ucode_data_backup.v_addr)
1365 goto err_pci_alloc;
1366
1367 /* Initialization instructions and data */
1368 if (init_size && init_data_size) {
1369 priv->ucode_init.len = init_size;
1370 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1371
1372 priv->ucode_init_data.len = init_data_size;
1373 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1374
1375 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1376 goto err_pci_alloc;
1377 }
1378
1379 /* Bootstrap (instructions only, no data) */
1380 if (boot_size) {
1381 priv->ucode_boot.len = boot_size;
1382 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1383
1384 if (!priv->ucode_boot.v_addr)
1385 goto err_pci_alloc;
1386 }
1387
1388 /* Copy images into buffers for card's bus-master reads ... */
1389
1390 /* Runtime instructions (first block of data in file) */
1391 src = &ucode->data[0];
1392 len = priv->ucode_code.len;
1393 IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1394 memcpy(priv->ucode_code.v_addr, src, len);
1395 IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1396 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1397
1398 /* Runtime data (2nd block)
1399 * NOTE: Copy into backup buffer will be done in iwl_up() */
1400 src = &ucode->data[inst_size];
1401 len = priv->ucode_data.len;
1402 IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1403 memcpy(priv->ucode_data.v_addr, src, len);
1404 memcpy(priv->ucode_data_backup.v_addr, src, len);
1405
1406 /* Initialization instructions (3rd block) */
1407 if (init_size) {
1408 src = &ucode->data[inst_size + data_size];
1409 len = priv->ucode_init.len;
1410 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1411 len);
1412 memcpy(priv->ucode_init.v_addr, src, len);
1413 }
1414
1415 /* Initialization data (4th block) */
1416 if (init_data_size) {
1417 src = &ucode->data[inst_size + data_size + init_size];
1418 len = priv->ucode_init_data.len;
1419 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1420 len);
1421 memcpy(priv->ucode_init_data.v_addr, src, len);
1422 }
1423
1424 /* Bootstrap instructions (5th block) */
1425 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1426 len = priv->ucode_boot.len;
1427 IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1428 memcpy(priv->ucode_boot.v_addr, src, len);
1429
1430 /* We have our copies now, allow OS release its copies */
1431 release_firmware(ucode_raw);
1432 return 0;
1433
1434 err_pci_alloc:
1435 IWL_ERR(priv, "failed to allocate pci memory\n");
1436 ret = -ENOMEM;
1437 iwl_dealloc_ucode_pci(priv);
1438
1439 err_release:
1440 release_firmware(ucode_raw);
1441
1442 error:
1443 return ret;
1444 }
1445
1446 /* temporary */
1447 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1448 struct sk_buff *skb);
1449
1450 /**
1451 * iwl_alive_start - called after REPLY_ALIVE notification received
1452 * from protocol/runtime uCode (initialization uCode's
1453 * Alive gets handled by iwl_init_alive_start()).
1454 */
1455 static void iwl_alive_start(struct iwl_priv *priv)
1456 {
1457 int ret = 0;
1458
1459 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1460
1461 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1462 /* We had an error bringing up the hardware, so take it
1463 * all the way back down so we can try again */
1464 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1465 goto restart;
1466 }
1467
1468 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1469 * This is a paranoid check, because we would not have gotten the
1470 * "runtime" alive if code weren't properly loaded. */
1471 if (iwl_verify_ucode(priv)) {
1472 /* Runtime instruction load was bad;
1473 * take it all the way back down so we can try again */
1474 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1475 goto restart;
1476 }
1477
1478 iwl_clear_stations_table(priv);
1479 ret = priv->cfg->ops->lib->alive_notify(priv);
1480 if (ret) {
1481 IWL_WARN(priv,
1482 "Could not complete ALIVE transition [ntf]: %d\n", ret);
1483 goto restart;
1484 }
1485
1486 /* After the ALIVE response, we can send host commands to the uCode */
1487 set_bit(STATUS_ALIVE, &priv->status);
1488
1489 if (iwl_is_rfkill(priv))
1490 return;
1491
1492 ieee80211_wake_queues(priv->hw);
1493
1494 priv->active_rate = priv->rates_mask;
1495 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1496
1497 if (iwl_is_associated(priv)) {
1498 struct iwl_rxon_cmd *active_rxon =
1499 (struct iwl_rxon_cmd *)&priv->active_rxon;
1500 /* apply any changes in staging */
1501 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1502 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1503 } else {
1504 /* Initialize our rx_config data */
1505 iwl_connection_init_rx_config(priv, priv->iw_mode);
1506 iwl_set_rxon_chain(priv);
1507 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1508 }
1509
1510 /* Configure Bluetooth device coexistence support */
1511 iwl_send_bt_config(priv);
1512
1513 iwl_reset_run_time_calib(priv);
1514
1515 /* Configure the adapter for unassociated operation */
1516 iwl_commit_rxon(priv);
1517
1518 /* At this point, the NIC is initialized and operational */
1519 iwl_rf_kill_ct_config(priv);
1520
1521 iwl_leds_register(priv);
1522
1523 IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1524 set_bit(STATUS_READY, &priv->status);
1525 wake_up_interruptible(&priv->wait_command_queue);
1526
1527 if (priv->error_recovering)
1528 iwl_error_recovery(priv);
1529
1530 iwl_power_update_mode(priv, 1);
1531
1532 /* reassociate for ADHOC mode */
1533 if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1534 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1535 priv->vif);
1536 if (beacon)
1537 iwl_mac_beacon_update(priv->hw, beacon);
1538 }
1539
1540
1541 if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1542 iwl_set_mode(priv, priv->iw_mode);
1543
1544 return;
1545
1546 restart:
1547 queue_work(priv->workqueue, &priv->restart);
1548 }
1549
1550 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1551
1552 static void __iwl_down(struct iwl_priv *priv)
1553 {
1554 unsigned long flags;
1555 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1556
1557 IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1558
1559 if (!exit_pending)
1560 set_bit(STATUS_EXIT_PENDING, &priv->status);
1561
1562 iwl_leds_unregister(priv);
1563
1564 iwl_clear_stations_table(priv);
1565
1566 /* Unblock any waiting calls */
1567 wake_up_interruptible_all(&priv->wait_command_queue);
1568
1569 /* Wipe out the EXIT_PENDING status bit if we are not actually
1570 * exiting the module */
1571 if (!exit_pending)
1572 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1573
1574 /* stop and reset the on-board processor */
1575 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1576
1577 /* tell the device to stop sending interrupts */
1578 spin_lock_irqsave(&priv->lock, flags);
1579 iwl_disable_interrupts(priv);
1580 spin_unlock_irqrestore(&priv->lock, flags);
1581 iwl_synchronize_irq(priv);
1582
1583 if (priv->mac80211_registered)
1584 ieee80211_stop_queues(priv->hw);
1585
1586 /* If we have not previously called iwl_init() then
1587 * clear all bits but the RF Kill bits and return */
1588 if (!iwl_is_init(priv)) {
1589 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1590 STATUS_RF_KILL_HW |
1591 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1592 STATUS_RF_KILL_SW |
1593 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1594 STATUS_GEO_CONFIGURED |
1595 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1596 STATUS_EXIT_PENDING;
1597 goto exit;
1598 }
1599
1600 /* ...otherwise clear out all the status bits but the RF Kill
1601 * bits and continue taking the NIC down. */
1602 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1603 STATUS_RF_KILL_HW |
1604 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1605 STATUS_RF_KILL_SW |
1606 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1607 STATUS_GEO_CONFIGURED |
1608 test_bit(STATUS_FW_ERROR, &priv->status) <<
1609 STATUS_FW_ERROR |
1610 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1611 STATUS_EXIT_PENDING;
1612
1613 spin_lock_irqsave(&priv->lock, flags);
1614 iwl_clear_bit(priv, CSR_GP_CNTRL,
1615 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1616 spin_unlock_irqrestore(&priv->lock, flags);
1617
1618 iwl_txq_ctx_stop(priv);
1619 iwl_rxq_stop(priv);
1620
1621 spin_lock_irqsave(&priv->lock, flags);
1622 if (!iwl_grab_nic_access(priv)) {
1623 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1624 APMG_CLK_VAL_DMA_CLK_RQT);
1625 iwl_release_nic_access(priv);
1626 }
1627 spin_unlock_irqrestore(&priv->lock, flags);
1628
1629 udelay(5);
1630
1631 /* FIXME: apm_ops.suspend(priv) */
1632 if (exit_pending)
1633 priv->cfg->ops->lib->apm_ops.stop(priv);
1634 else
1635 priv->cfg->ops->lib->apm_ops.reset(priv);
1636 exit:
1637 memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1638
1639 if (priv->ibss_beacon)
1640 dev_kfree_skb(priv->ibss_beacon);
1641 priv->ibss_beacon = NULL;
1642
1643 /* clear out any free frames */
1644 iwl_clear_free_frames(priv);
1645 }
1646
1647 static void iwl_down(struct iwl_priv *priv)
1648 {
1649 mutex_lock(&priv->mutex);
1650 __iwl_down(priv);
1651 mutex_unlock(&priv->mutex);
1652
1653 iwl_cancel_deferred_work(priv);
1654 }
1655
1656 #define MAX_HW_RESTARTS 5
1657
1658 static int __iwl_up(struct iwl_priv *priv)
1659 {
1660 int i;
1661 int ret;
1662
1663 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1664 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1665 return -EIO;
1666 }
1667
1668 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1669 IWL_ERR(priv, "ucode not available for device bringup\n");
1670 return -EIO;
1671 }
1672
1673 /* If platform's RF_KILL switch is NOT set to KILL */
1674 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1675 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1676 else
1677 set_bit(STATUS_RF_KILL_HW, &priv->status);
1678
1679 if (iwl_is_rfkill(priv)) {
1680 iwl_enable_interrupts(priv);
1681 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1682 test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1683 return 0;
1684 }
1685
1686 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1687
1688 ret = iwl_hw_nic_init(priv);
1689 if (ret) {
1690 IWL_ERR(priv, "Unable to init nic\n");
1691 return ret;
1692 }
1693
1694 /* make sure rfkill handshake bits are cleared */
1695 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1696 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1697 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1698
1699 /* clear (again), then enable host interrupts */
1700 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1701 iwl_enable_interrupts(priv);
1702
1703 /* really make sure rfkill handshake bits are cleared */
1704 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1705 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1706
1707 /* Copy original ucode data image from disk into backup cache.
1708 * This will be used to initialize the on-board processor's
1709 * data SRAM for a clean start when the runtime program first loads. */
1710 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1711 priv->ucode_data.len);
1712
1713 for (i = 0; i < MAX_HW_RESTARTS; i++) {
1714
1715 iwl_clear_stations_table(priv);
1716
1717 /* load bootstrap state machine,
1718 * load bootstrap program into processor's memory,
1719 * prepare to load the "initialize" uCode */
1720 ret = priv->cfg->ops->lib->load_ucode(priv);
1721
1722 if (ret) {
1723 IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1724 ret);
1725 continue;
1726 }
1727
1728 /* Clear out the uCode error bit if it is set */
1729 clear_bit(STATUS_FW_ERROR, &priv->status);
1730
1731 /* start card; "initialize" will load runtime ucode */
1732 iwl_nic_start(priv);
1733
1734 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1735
1736 return 0;
1737 }
1738
1739 set_bit(STATUS_EXIT_PENDING, &priv->status);
1740 __iwl_down(priv);
1741 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1742
1743 /* tried to restart and config the device for as long as our
1744 * patience could withstand */
1745 IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1746 return -EIO;
1747 }
1748
1749
1750 /*****************************************************************************
1751 *
1752 * Workqueue callbacks
1753 *
1754 *****************************************************************************/
1755
1756 static void iwl_bg_init_alive_start(struct work_struct *data)
1757 {
1758 struct iwl_priv *priv =
1759 container_of(data, struct iwl_priv, init_alive_start.work);
1760
1761 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1762 return;
1763
1764 mutex_lock(&priv->mutex);
1765 priv->cfg->ops->lib->init_alive_start(priv);
1766 mutex_unlock(&priv->mutex);
1767 }
1768
1769 static void iwl_bg_alive_start(struct work_struct *data)
1770 {
1771 struct iwl_priv *priv =
1772 container_of(data, struct iwl_priv, alive_start.work);
1773
1774 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1775 return;
1776
1777 mutex_lock(&priv->mutex);
1778 iwl_alive_start(priv);
1779 mutex_unlock(&priv->mutex);
1780 }
1781
1782 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1783 {
1784 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1785 run_time_calib_work);
1786
1787 mutex_lock(&priv->mutex);
1788
1789 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1790 test_bit(STATUS_SCANNING, &priv->status)) {
1791 mutex_unlock(&priv->mutex);
1792 return;
1793 }
1794
1795 if (priv->start_calib) {
1796 iwl_chain_noise_calibration(priv, &priv->statistics);
1797
1798 iwl_sensitivity_calibration(priv, &priv->statistics);
1799 }
1800
1801 mutex_unlock(&priv->mutex);
1802 return;
1803 }
1804
1805 static void iwl_bg_up(struct work_struct *data)
1806 {
1807 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1808
1809 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1810 return;
1811
1812 mutex_lock(&priv->mutex);
1813 __iwl_up(priv);
1814 mutex_unlock(&priv->mutex);
1815 iwl_rfkill_set_hw_state(priv);
1816 }
1817
1818 static void iwl_bg_restart(struct work_struct *data)
1819 {
1820 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1821
1822 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1823 return;
1824
1825 iwl_down(priv);
1826 queue_work(priv->workqueue, &priv->up);
1827 }
1828
1829 static void iwl_bg_rx_replenish(struct work_struct *data)
1830 {
1831 struct iwl_priv *priv =
1832 container_of(data, struct iwl_priv, rx_replenish);
1833
1834 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1835 return;
1836
1837 mutex_lock(&priv->mutex);
1838 iwl_rx_replenish(priv);
1839 mutex_unlock(&priv->mutex);
1840 }
1841
1842 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1843
1844 void iwl_post_associate(struct iwl_priv *priv)
1845 {
1846 struct ieee80211_conf *conf = NULL;
1847 int ret = 0;
1848 unsigned long flags;
1849
1850 if (priv->iw_mode == NL80211_IFTYPE_AP) {
1851 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1852 return;
1853 }
1854
1855 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1856 priv->assoc_id, priv->active_rxon.bssid_addr);
1857
1858
1859 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1860 return;
1861
1862
1863 if (!priv->vif || !priv->is_open)
1864 return;
1865
1866 iwl_power_cancel_timeout(priv);
1867 iwl_scan_cancel_timeout(priv, 200);
1868
1869 conf = ieee80211_get_hw_conf(priv->hw);
1870
1871 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1872 iwl_commit_rxon(priv);
1873
1874 iwl_setup_rxon_timing(priv);
1875 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1876 sizeof(priv->rxon_timing), &priv->rxon_timing);
1877 if (ret)
1878 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1879 "Attempting to continue.\n");
1880
1881 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1882
1883 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1884
1885 iwl_set_rxon_chain(priv);
1886 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1887
1888 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1889 priv->assoc_id, priv->beacon_int);
1890
1891 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1892 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1893 else
1894 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1895
1896 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1897 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1898 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1899 else
1900 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1901
1902 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1903 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1904
1905 }
1906
1907 iwl_commit_rxon(priv);
1908
1909 switch (priv->iw_mode) {
1910 case NL80211_IFTYPE_STATION:
1911 break;
1912
1913 case NL80211_IFTYPE_ADHOC:
1914
1915 /* assume default assoc id */
1916 priv->assoc_id = 1;
1917
1918 iwl_rxon_add_station(priv, priv->bssid, 0);
1919 iwl_send_beacon_cmd(priv);
1920
1921 break;
1922
1923 default:
1924 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1925 __func__, priv->iw_mode);
1926 break;
1927 }
1928
1929 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1930 priv->assoc_station_added = 1;
1931
1932 spin_lock_irqsave(&priv->lock, flags);
1933 iwl_activate_qos(priv, 0);
1934 spin_unlock_irqrestore(&priv->lock, flags);
1935
1936 /* the chain noise calibration will enabled PM upon completion
1937 * If chain noise has already been run, then we need to enable
1938 * power management here */
1939 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1940 iwl_power_enable_management(priv);
1941
1942 /* Enable Rx differential gain and sensitivity calibrations */
1943 iwl_chain_noise_reset(priv);
1944 priv->start_calib = 1;
1945
1946 }
1947
1948 /*****************************************************************************
1949 *
1950 * mac80211 entry point functions
1951 *
1952 *****************************************************************************/
1953
1954 #define UCODE_READY_TIMEOUT (4 * HZ)
1955
1956 static int iwl_mac_start(struct ieee80211_hw *hw)
1957 {
1958 struct iwl_priv *priv = hw->priv;
1959 int ret;
1960
1961 IWL_DEBUG_MAC80211(priv, "enter\n");
1962
1963 /* we should be verifying the device is ready to be opened */
1964 mutex_lock(&priv->mutex);
1965
1966 memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
1967 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
1968 * ucode filename and max sizes are card-specific. */
1969
1970 if (!priv->ucode_code.len) {
1971 ret = iwl_read_ucode(priv);
1972 if (ret) {
1973 IWL_ERR(priv, "Could not read microcode: %d\n", ret);
1974 mutex_unlock(&priv->mutex);
1975 return ret;
1976 }
1977 }
1978
1979 ret = __iwl_up(priv);
1980
1981 mutex_unlock(&priv->mutex);
1982
1983 iwl_rfkill_set_hw_state(priv);
1984
1985 if (ret)
1986 return ret;
1987
1988 if (iwl_is_rfkill(priv))
1989 goto out;
1990
1991 IWL_DEBUG_INFO(priv, "Start UP work done.\n");
1992
1993 /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
1994 * mac80211 will not be run successfully. */
1995 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
1996 test_bit(STATUS_READY, &priv->status),
1997 UCODE_READY_TIMEOUT);
1998 if (!ret) {
1999 if (!test_bit(STATUS_READY, &priv->status)) {
2000 IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2001 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2002 return -ETIMEDOUT;
2003 }
2004 }
2005
2006 out:
2007 priv->is_open = 1;
2008 IWL_DEBUG_MAC80211(priv, "leave\n");
2009 return 0;
2010 }
2011
2012 static void iwl_mac_stop(struct ieee80211_hw *hw)
2013 {
2014 struct iwl_priv *priv = hw->priv;
2015
2016 IWL_DEBUG_MAC80211(priv, "enter\n");
2017
2018 if (!priv->is_open) {
2019 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2020 return;
2021 }
2022
2023 priv->is_open = 0;
2024
2025 if (iwl_is_ready_rf(priv)) {
2026 /* stop mac, cancel any scan request and clear
2027 * RXON_FILTER_ASSOC_MSK BIT
2028 */
2029 mutex_lock(&priv->mutex);
2030 iwl_scan_cancel_timeout(priv, 100);
2031 mutex_unlock(&priv->mutex);
2032 }
2033
2034 iwl_down(priv);
2035
2036 flush_workqueue(priv->workqueue);
2037
2038 /* enable interrupts again in order to receive rfkill changes */
2039 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2040 iwl_enable_interrupts(priv);
2041
2042 IWL_DEBUG_MAC80211(priv, "leave\n");
2043 }
2044
2045 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2046 {
2047 struct iwl_priv *priv = hw->priv;
2048
2049 IWL_DEBUG_MACDUMP(priv, "enter\n");
2050
2051 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2052 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2053
2054 if (iwl_tx_skb(priv, skb))
2055 dev_kfree_skb_any(skb);
2056
2057 IWL_DEBUG_MACDUMP(priv, "leave\n");
2058 return NETDEV_TX_OK;
2059 }
2060
2061 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2062 struct ieee80211_if_init_conf *conf)
2063 {
2064 struct iwl_priv *priv = hw->priv;
2065 unsigned long flags;
2066
2067 IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2068
2069 if (priv->vif) {
2070 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2071 return -EOPNOTSUPP;
2072 }
2073
2074 spin_lock_irqsave(&priv->lock, flags);
2075 priv->vif = conf->vif;
2076 priv->iw_mode = conf->type;
2077
2078 spin_unlock_irqrestore(&priv->lock, flags);
2079
2080 mutex_lock(&priv->mutex);
2081
2082 if (conf->mac_addr) {
2083 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2084 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2085 }
2086
2087 if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2088 /* we are not ready, will run again when ready */
2089 set_bit(STATUS_MODE_PENDING, &priv->status);
2090
2091 mutex_unlock(&priv->mutex);
2092
2093 IWL_DEBUG_MAC80211(priv, "leave\n");
2094 return 0;
2095 }
2096
2097 /**
2098 * iwl_mac_config - mac80211 config callback
2099 *
2100 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2101 * be set inappropriately and the driver currently sets the hardware up to
2102 * use it whenever needed.
2103 */
2104 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2105 {
2106 struct iwl_priv *priv = hw->priv;
2107 const struct iwl_channel_info *ch_info;
2108 struct ieee80211_conf *conf = &hw->conf;
2109 unsigned long flags = 0;
2110 int ret = 0;
2111 u16 ch;
2112 int scan_active = 0;
2113
2114 mutex_lock(&priv->mutex);
2115 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2116 conf->channel->hw_value, changed);
2117
2118 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2119 test_bit(STATUS_SCANNING, &priv->status))) {
2120 scan_active = 1;
2121 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2122 }
2123
2124
2125 /* during scanning mac80211 will delay channel setting until
2126 * scan finish with changed = 0
2127 */
2128 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2129 if (scan_active)
2130 goto set_ch_out;
2131
2132 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2133 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2134 if (!is_channel_valid(ch_info)) {
2135 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2136 ret = -EINVAL;
2137 goto set_ch_out;
2138 }
2139
2140 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2141 !is_channel_ibss(ch_info)) {
2142 IWL_ERR(priv, "channel %d in band %d not "
2143 "IBSS channel\n",
2144 conf->channel->hw_value, conf->channel->band);
2145 ret = -EINVAL;
2146 goto set_ch_out;
2147 }
2148
2149 priv->current_ht_config.is_ht = conf_is_ht(conf);
2150
2151 spin_lock_irqsave(&priv->lock, flags);
2152
2153
2154 /* if we are switching from ht to 2.4 clear flags
2155 * from any ht related info since 2.4 does not
2156 * support ht */
2157 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2158 priv->staging_rxon.flags = 0;
2159
2160 iwl_set_rxon_channel(priv, conf->channel);
2161
2162 iwl_set_flags_for_band(priv, conf->channel->band);
2163 spin_unlock_irqrestore(&priv->lock, flags);
2164 set_ch_out:
2165 /* The list of supported rates and rate mask can be different
2166 * for each band; since the band may have changed, reset
2167 * the rate mask to what mac80211 lists */
2168 iwl_set_rate(priv);
2169 }
2170
2171 if (changed & IEEE80211_CONF_CHANGE_PS) {
2172 if (conf->flags & IEEE80211_CONF_PS)
2173 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2174 else
2175 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2176 if (ret)
2177 IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2178
2179 }
2180
2181 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2182 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2183 priv->tx_power_user_lmt, conf->power_level);
2184
2185 iwl_set_tx_power(priv, conf->power_level, false);
2186 }
2187
2188 /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2189 iwl_set_rxon_chain(priv);
2190
2191 if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2192 if (conf->radio_enabled &&
2193 iwl_radio_kill_sw_enable_radio(priv)) {
2194 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2195 "waiting for uCode\n");
2196 goto out;
2197 }
2198
2199 if (!conf->radio_enabled)
2200 iwl_radio_kill_sw_disable_radio(priv);
2201 }
2202
2203 if (!conf->radio_enabled) {
2204 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2205 goto out;
2206 }
2207
2208 if (!iwl_is_ready(priv)) {
2209 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2210 goto out;
2211 }
2212
2213 if (scan_active)
2214 goto out;
2215
2216 if (memcmp(&priv->active_rxon,
2217 &priv->staging_rxon, sizeof(priv->staging_rxon)))
2218 iwl_commit_rxon(priv);
2219 else
2220 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2221
2222
2223 out:
2224 IWL_DEBUG_MAC80211(priv, "leave\n");
2225 mutex_unlock(&priv->mutex);
2226 return ret;
2227 }
2228
2229 static void iwl_config_ap(struct iwl_priv *priv)
2230 {
2231 int ret = 0;
2232 unsigned long flags;
2233
2234 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2235 return;
2236
2237 /* The following should be done only at AP bring up */
2238 if (!iwl_is_associated(priv)) {
2239
2240 /* RXON - unassoc (to set timing command) */
2241 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2242 iwl_commit_rxon(priv);
2243
2244 /* RXON Timing */
2245 iwl_setup_rxon_timing(priv);
2246 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2247 sizeof(priv->rxon_timing), &priv->rxon_timing);
2248 if (ret)
2249 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2250 "Attempting to continue.\n");
2251
2252 iwl_set_rxon_chain(priv);
2253
2254 /* FIXME: what should be the assoc_id for AP? */
2255 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2256 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2257 priv->staging_rxon.flags |=
2258 RXON_FLG_SHORT_PREAMBLE_MSK;
2259 else
2260 priv->staging_rxon.flags &=
2261 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2262
2263 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2264 if (priv->assoc_capability &
2265 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2266 priv->staging_rxon.flags |=
2267 RXON_FLG_SHORT_SLOT_MSK;
2268 else
2269 priv->staging_rxon.flags &=
2270 ~RXON_FLG_SHORT_SLOT_MSK;
2271
2272 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2273 priv->staging_rxon.flags &=
2274 ~RXON_FLG_SHORT_SLOT_MSK;
2275 }
2276 /* restore RXON assoc */
2277 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2278 iwl_commit_rxon(priv);
2279 spin_lock_irqsave(&priv->lock, flags);
2280 iwl_activate_qos(priv, 1);
2281 spin_unlock_irqrestore(&priv->lock, flags);
2282 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2283 }
2284 iwl_send_beacon_cmd(priv);
2285
2286 /* FIXME - we need to add code here to detect a totally new
2287 * configuration, reset the AP, unassoc, rxon timing, assoc,
2288 * clear sta table, add BCAST sta... */
2289 }
2290
2291
2292 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2293 struct ieee80211_vif *vif,
2294 struct ieee80211_if_conf *conf)
2295 {
2296 struct iwl_priv *priv = hw->priv;
2297 int rc;
2298
2299 if (conf == NULL)
2300 return -EIO;
2301
2302 if (priv->vif != vif) {
2303 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2304 return 0;
2305 }
2306
2307 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2308 conf->changed & IEEE80211_IFCC_BEACON) {
2309 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2310 if (!beacon)
2311 return -ENOMEM;
2312 mutex_lock(&priv->mutex);
2313 rc = iwl_mac_beacon_update(hw, beacon);
2314 mutex_unlock(&priv->mutex);
2315 if (rc)
2316 return rc;
2317 }
2318
2319 if (!iwl_is_alive(priv))
2320 return -EAGAIN;
2321
2322 mutex_lock(&priv->mutex);
2323
2324 if (conf->bssid)
2325 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2326
2327 /*
2328 * very dubious code was here; the probe filtering flag is never set:
2329 *
2330 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2331 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2332 */
2333
2334 if (priv->iw_mode == NL80211_IFTYPE_AP) {
2335 if (!conf->bssid) {
2336 conf->bssid = priv->mac_addr;
2337 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2338 IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2339 conf->bssid);
2340 }
2341 if (priv->ibss_beacon)
2342 dev_kfree_skb(priv->ibss_beacon);
2343
2344 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2345 }
2346
2347 if (iwl_is_rfkill(priv))
2348 goto done;
2349
2350 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2351 !is_multicast_ether_addr(conf->bssid)) {
2352 /* If there is currently a HW scan going on in the background
2353 * then we need to cancel it else the RXON below will fail. */
2354 if (iwl_scan_cancel_timeout(priv, 100)) {
2355 IWL_WARN(priv, "Aborted scan still in progress "
2356 "after 100ms\n");
2357 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2358 mutex_unlock(&priv->mutex);
2359 return -EAGAIN;
2360 }
2361 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2362
2363 /* TODO: Audit driver for usage of these members and see
2364 * if mac80211 deprecates them (priv->bssid looks like it
2365 * shouldn't be there, but I haven't scanned the IBSS code
2366 * to verify) - jpk */
2367 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2368
2369 if (priv->iw_mode == NL80211_IFTYPE_AP)
2370 iwl_config_ap(priv);
2371 else {
2372 rc = iwl_commit_rxon(priv);
2373 if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2374 iwl_rxon_add_station(
2375 priv, priv->active_rxon.bssid_addr, 1);
2376 }
2377
2378 } else {
2379 iwl_scan_cancel_timeout(priv, 100);
2380 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2381 iwl_commit_rxon(priv);
2382 }
2383
2384 done:
2385 IWL_DEBUG_MAC80211(priv, "leave\n");
2386 mutex_unlock(&priv->mutex);
2387
2388 return 0;
2389 }
2390
2391 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2392 struct ieee80211_if_init_conf *conf)
2393 {
2394 struct iwl_priv *priv = hw->priv;
2395
2396 IWL_DEBUG_MAC80211(priv, "enter\n");
2397
2398 mutex_lock(&priv->mutex);
2399
2400 if (iwl_is_ready_rf(priv)) {
2401 iwl_scan_cancel_timeout(priv, 100);
2402 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2403 iwl_commit_rxon(priv);
2404 }
2405 if (priv->vif == conf->vif) {
2406 priv->vif = NULL;
2407 memset(priv->bssid, 0, ETH_ALEN);
2408 }
2409 mutex_unlock(&priv->mutex);
2410
2411 IWL_DEBUG_MAC80211(priv, "leave\n");
2412
2413 }
2414
2415 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2416 struct ieee80211_key_conf *keyconf, const u8 *addr,
2417 u32 iv32, u16 *phase1key)
2418 {
2419
2420 struct iwl_priv *priv = hw->priv;
2421 IWL_DEBUG_MAC80211(priv, "enter\n");
2422
2423 iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2424
2425 IWL_DEBUG_MAC80211(priv, "leave\n");
2426 }
2427
2428 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2429 struct ieee80211_vif *vif,
2430 struct ieee80211_sta *sta,
2431 struct ieee80211_key_conf *key)
2432 {
2433 struct iwl_priv *priv = hw->priv;
2434 const u8 *addr;
2435 int ret;
2436 u8 sta_id;
2437 bool is_default_wep_key = false;
2438
2439 IWL_DEBUG_MAC80211(priv, "enter\n");
2440
2441 if (priv->hw_params.sw_crypto) {
2442 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2443 return -EOPNOTSUPP;
2444 }
2445 addr = sta ? sta->addr : iwl_bcast_addr;
2446 sta_id = iwl_find_station(priv, addr);
2447 if (sta_id == IWL_INVALID_STATION) {
2448 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2449 addr);
2450 return -EINVAL;
2451
2452 }
2453
2454 mutex_lock(&priv->mutex);
2455 iwl_scan_cancel_timeout(priv, 100);
2456 mutex_unlock(&priv->mutex);
2457
2458 /* If we are getting WEP group key and we didn't receive any key mapping
2459 * so far, we are in legacy wep mode (group key only), otherwise we are
2460 * in 1X mode.
2461 * In legacy wep mode, we use another host command to the uCode */
2462 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2463 priv->iw_mode != NL80211_IFTYPE_AP) {
2464 if (cmd == SET_KEY)
2465 is_default_wep_key = !priv->key_mapping_key;
2466 else
2467 is_default_wep_key =
2468 (key->hw_key_idx == HW_KEY_DEFAULT);
2469 }
2470
2471 switch (cmd) {
2472 case SET_KEY:
2473 if (is_default_wep_key)
2474 ret = iwl_set_default_wep_key(priv, key);
2475 else
2476 ret = iwl_set_dynamic_key(priv, key, sta_id);
2477
2478 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2479 break;
2480 case DISABLE_KEY:
2481 if (is_default_wep_key)
2482 ret = iwl_remove_default_wep_key(priv, key);
2483 else
2484 ret = iwl_remove_dynamic_key(priv, key, sta_id);
2485
2486 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2487 break;
2488 default:
2489 ret = -EINVAL;
2490 }
2491
2492 IWL_DEBUG_MAC80211(priv, "leave\n");
2493
2494 return ret;
2495 }
2496
2497 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2498 enum ieee80211_ampdu_mlme_action action,
2499 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2500 {
2501 struct iwl_priv *priv = hw->priv;
2502 int ret;
2503
2504 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2505 sta->addr, tid);
2506
2507 if (!(priv->cfg->sku & IWL_SKU_N))
2508 return -EACCES;
2509
2510 switch (action) {
2511 case IEEE80211_AMPDU_RX_START:
2512 IWL_DEBUG_HT(priv, "start Rx\n");
2513 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2514 case IEEE80211_AMPDU_RX_STOP:
2515 IWL_DEBUG_HT(priv, "stop Rx\n");
2516 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2517 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2518 return 0;
2519 else
2520 return ret;
2521 case IEEE80211_AMPDU_TX_START:
2522 IWL_DEBUG_HT(priv, "start Tx\n");
2523 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2524 case IEEE80211_AMPDU_TX_STOP:
2525 IWL_DEBUG_HT(priv, "stop Tx\n");
2526 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2527 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2528 return 0;
2529 else
2530 return ret;
2531 default:
2532 IWL_DEBUG_HT(priv, "unknown\n");
2533 return -EINVAL;
2534 break;
2535 }
2536 return 0;
2537 }
2538
2539 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2540 struct ieee80211_tx_queue_stats *stats)
2541 {
2542 struct iwl_priv *priv = hw->priv;
2543 int i, avail;
2544 struct iwl_tx_queue *txq;
2545 struct iwl_queue *q;
2546 unsigned long flags;
2547
2548 IWL_DEBUG_MAC80211(priv, "enter\n");
2549
2550 if (!iwl_is_ready_rf(priv)) {
2551 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2552 return -EIO;
2553 }
2554
2555 spin_lock_irqsave(&priv->lock, flags);
2556
2557 for (i = 0; i < AC_NUM; i++) {
2558 txq = &priv->txq[i];
2559 q = &txq->q;
2560 avail = iwl_queue_space(q);
2561
2562 stats[i].len = q->n_window - avail;
2563 stats[i].limit = q->n_window - q->high_mark;
2564 stats[i].count = q->n_window;
2565
2566 }
2567 spin_unlock_irqrestore(&priv->lock, flags);
2568
2569 IWL_DEBUG_MAC80211(priv, "leave\n");
2570
2571 return 0;
2572 }
2573
2574 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2575 struct ieee80211_low_level_stats *stats)
2576 {
2577 struct iwl_priv *priv = hw->priv;
2578
2579 priv = hw->priv;
2580 IWL_DEBUG_MAC80211(priv, "enter\n");
2581 IWL_DEBUG_MAC80211(priv, "leave\n");
2582
2583 return 0;
2584 }
2585
2586 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2587 {
2588 struct iwl_priv *priv = hw->priv;
2589 unsigned long flags;
2590
2591 mutex_lock(&priv->mutex);
2592 IWL_DEBUG_MAC80211(priv, "enter\n");
2593
2594 spin_lock_irqsave(&priv->lock, flags);
2595 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2596 spin_unlock_irqrestore(&priv->lock, flags);
2597
2598 iwl_reset_qos(priv);
2599
2600 spin_lock_irqsave(&priv->lock, flags);
2601 priv->assoc_id = 0;
2602 priv->assoc_capability = 0;
2603 priv->assoc_station_added = 0;
2604
2605 /* new association get rid of ibss beacon skb */
2606 if (priv->ibss_beacon)
2607 dev_kfree_skb(priv->ibss_beacon);
2608
2609 priv->ibss_beacon = NULL;
2610
2611 priv->beacon_int = priv->hw->conf.beacon_int;
2612 priv->timestamp = 0;
2613 if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2614 priv->beacon_int = 0;
2615
2616 spin_unlock_irqrestore(&priv->lock, flags);
2617
2618 if (!iwl_is_ready_rf(priv)) {
2619 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2620 mutex_unlock(&priv->mutex);
2621 return;
2622 }
2623
2624 /* we are restarting association process
2625 * clear RXON_FILTER_ASSOC_MSK bit
2626 */
2627 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2628 iwl_scan_cancel_timeout(priv, 100);
2629 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2630 iwl_commit_rxon(priv);
2631 }
2632
2633 iwl_power_update_mode(priv, 0);
2634
2635 /* Per mac80211.h: This is only used in IBSS mode... */
2636 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2637
2638 /* switch to CAM during association period.
2639 * the ucode will block any association/authentication
2640 * frome during assiciation period if it can not hear
2641 * the AP because of PM. the timer enable PM back is
2642 * association do not complete
2643 */
2644 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2645 IEEE80211_CHAN_RADAR))
2646 iwl_power_disable_management(priv, 3000);
2647
2648 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2649 mutex_unlock(&priv->mutex);
2650 return;
2651 }
2652
2653 iwl_set_rate(priv);
2654
2655 mutex_unlock(&priv->mutex);
2656
2657 IWL_DEBUG_MAC80211(priv, "leave\n");
2658 }
2659
2660 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2661 {
2662 struct iwl_priv *priv = hw->priv;
2663 unsigned long flags;
2664 __le64 timestamp;
2665
2666 IWL_DEBUG_MAC80211(priv, "enter\n");
2667
2668 if (!iwl_is_ready_rf(priv)) {
2669 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2670 return -EIO;
2671 }
2672
2673 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2674 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2675 return -EIO;
2676 }
2677
2678 spin_lock_irqsave(&priv->lock, flags);
2679
2680 if (priv->ibss_beacon)
2681 dev_kfree_skb(priv->ibss_beacon);
2682
2683 priv->ibss_beacon = skb;
2684
2685 priv->assoc_id = 0;
2686 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2687 priv->timestamp = le64_to_cpu(timestamp);
2688
2689 IWL_DEBUG_MAC80211(priv, "leave\n");
2690 spin_unlock_irqrestore(&priv->lock, flags);
2691
2692 iwl_reset_qos(priv);
2693
2694 priv->cfg->ops->lib->post_associate(priv);
2695
2696
2697 return 0;
2698 }
2699
2700 /*****************************************************************************
2701 *
2702 * sysfs attributes
2703 *
2704 *****************************************************************************/
2705
2706 #ifdef CONFIG_IWLWIFI_DEBUG
2707
2708 /*
2709 * The following adds a new attribute to the sysfs representation
2710 * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2711 * used for controlling the debug level.
2712 *
2713 * See the level definitions in iwl for details.
2714 */
2715
2716 static ssize_t show_debug_level(struct device *d,
2717 struct device_attribute *attr, char *buf)
2718 {
2719 struct iwl_priv *priv = d->driver_data;
2720
2721 return sprintf(buf, "0x%08X\n", priv->debug_level);
2722 }
2723 static ssize_t store_debug_level(struct device *d,
2724 struct device_attribute *attr,
2725 const char *buf, size_t count)
2726 {
2727 struct iwl_priv *priv = d->driver_data;
2728 unsigned long val;
2729 int ret;
2730
2731 ret = strict_strtoul(buf, 0, &val);
2732 if (ret)
2733 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2734 else
2735 priv->debug_level = val;
2736
2737 return strnlen(buf, count);
2738 }
2739
2740 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2741 show_debug_level, store_debug_level);
2742
2743
2744 #endif /* CONFIG_IWLWIFI_DEBUG */
2745
2746
2747 static ssize_t show_version(struct device *d,
2748 struct device_attribute *attr, char *buf)
2749 {
2750 struct iwl_priv *priv = d->driver_data;
2751 struct iwl_alive_resp *palive = &priv->card_alive;
2752 ssize_t pos = 0;
2753 u16 eeprom_ver;
2754
2755 if (palive->is_valid)
2756 pos += sprintf(buf + pos,
2757 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2758 "fw type: 0x%01X 0x%01X\n",
2759 palive->ucode_major, palive->ucode_minor,
2760 palive->sw_rev[0], palive->sw_rev[1],
2761 palive->ver_type, palive->ver_subtype);
2762 else
2763 pos += sprintf(buf + pos, "fw not loaded\n");
2764
2765 if (priv->eeprom) {
2766 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2767 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2768 eeprom_ver);
2769 } else {
2770 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2771 }
2772
2773 return pos;
2774 }
2775
2776 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2777
2778 static ssize_t show_temperature(struct device *d,
2779 struct device_attribute *attr, char *buf)
2780 {
2781 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2782
2783 if (!iwl_is_alive(priv))
2784 return -EAGAIN;
2785
2786 return sprintf(buf, "%d\n", priv->temperature);
2787 }
2788
2789 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2790
2791 static ssize_t show_tx_power(struct device *d,
2792 struct device_attribute *attr, char *buf)
2793 {
2794 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2795
2796 if (!iwl_is_ready_rf(priv))
2797 return sprintf(buf, "off\n");
2798 else
2799 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2800 }
2801
2802 static ssize_t store_tx_power(struct device *d,
2803 struct device_attribute *attr,
2804 const char *buf, size_t count)
2805 {
2806 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2807 unsigned long val;
2808 int ret;
2809
2810 ret = strict_strtoul(buf, 10, &val);
2811 if (ret)
2812 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2813 else
2814 iwl_set_tx_power(priv, val, false);
2815
2816 return count;
2817 }
2818
2819 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2820
2821 static ssize_t show_flags(struct device *d,
2822 struct device_attribute *attr, char *buf)
2823 {
2824 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2825
2826 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2827 }
2828
2829 static ssize_t store_flags(struct device *d,
2830 struct device_attribute *attr,
2831 const char *buf, size_t count)
2832 {
2833 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2834 unsigned long val;
2835 u32 flags;
2836 int ret = strict_strtoul(buf, 0, &val);
2837 if (ret)
2838 return ret;
2839 flags = (u32)val;
2840
2841 mutex_lock(&priv->mutex);
2842 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2843 /* Cancel any currently running scans... */
2844 if (iwl_scan_cancel_timeout(priv, 100))
2845 IWL_WARN(priv, "Could not cancel scan.\n");
2846 else {
2847 IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2848 priv->staging_rxon.flags = cpu_to_le32(flags);
2849 iwl_commit_rxon(priv);
2850 }
2851 }
2852 mutex_unlock(&priv->mutex);
2853
2854 return count;
2855 }
2856
2857 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2858
2859 static ssize_t show_filter_flags(struct device *d,
2860 struct device_attribute *attr, char *buf)
2861 {
2862 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2863
2864 return sprintf(buf, "0x%04X\n",
2865 le32_to_cpu(priv->active_rxon.filter_flags));
2866 }
2867
2868 static ssize_t store_filter_flags(struct device *d,
2869 struct device_attribute *attr,
2870 const char *buf, size_t count)
2871 {
2872 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2873 unsigned long val;
2874 u32 filter_flags;
2875 int ret = strict_strtoul(buf, 0, &val);
2876 if (ret)
2877 return ret;
2878 filter_flags = (u32)val;
2879
2880 mutex_lock(&priv->mutex);
2881 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2882 /* Cancel any currently running scans... */
2883 if (iwl_scan_cancel_timeout(priv, 100))
2884 IWL_WARN(priv, "Could not cancel scan.\n");
2885 else {
2886 IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2887 "0x%04X\n", filter_flags);
2888 priv->staging_rxon.filter_flags =
2889 cpu_to_le32(filter_flags);
2890 iwl_commit_rxon(priv);
2891 }
2892 }
2893 mutex_unlock(&priv->mutex);
2894
2895 return count;
2896 }
2897
2898 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2899 store_filter_flags);
2900
2901 static ssize_t store_power_level(struct device *d,
2902 struct device_attribute *attr,
2903 const char *buf, size_t count)
2904 {
2905 struct iwl_priv *priv = dev_get_drvdata(d);
2906 int ret;
2907 unsigned long mode;
2908
2909
2910 mutex_lock(&priv->mutex);
2911
2912 ret = strict_strtoul(buf, 10, &mode);
2913 if (ret)
2914 goto out;
2915
2916 ret = iwl_power_set_user_mode(priv, mode);
2917 if (ret) {
2918 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
2919 goto out;
2920 }
2921 ret = count;
2922
2923 out:
2924 mutex_unlock(&priv->mutex);
2925 return ret;
2926 }
2927
2928 static ssize_t show_power_level(struct device *d,
2929 struct device_attribute *attr, char *buf)
2930 {
2931 struct iwl_priv *priv = dev_get_drvdata(d);
2932 int mode = priv->power_data.user_power_setting;
2933 int system = priv->power_data.system_power_setting;
2934 int level = priv->power_data.power_mode;
2935 char *p = buf;
2936
2937 switch (system) {
2938 case IWL_POWER_SYS_AUTO:
2939 p += sprintf(p, "SYSTEM:auto");
2940 break;
2941 case IWL_POWER_SYS_AC:
2942 p += sprintf(p, "SYSTEM:ac");
2943 break;
2944 case IWL_POWER_SYS_BATTERY:
2945 p += sprintf(p, "SYSTEM:battery");
2946 break;
2947 }
2948
2949 p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
2950 "fixed" : "auto");
2951 p += sprintf(p, "\tINDEX:%d", level);
2952 p += sprintf(p, "\n");
2953 return p - buf + 1;
2954 }
2955
2956 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
2957 store_power_level);
2958
2959
2960 static ssize_t show_statistics(struct device *d,
2961 struct device_attribute *attr, char *buf)
2962 {
2963 struct iwl_priv *priv = dev_get_drvdata(d);
2964 u32 size = sizeof(struct iwl_notif_statistics);
2965 u32 len = 0, ofs = 0;
2966 u8 *data = (u8 *)&priv->statistics;
2967 int rc = 0;
2968
2969 if (!iwl_is_alive(priv))
2970 return -EAGAIN;
2971
2972 mutex_lock(&priv->mutex);
2973 rc = iwl_send_statistics_request(priv, 0);
2974 mutex_unlock(&priv->mutex);
2975
2976 if (rc) {
2977 len = sprintf(buf,
2978 "Error sending statistics request: 0x%08X\n", rc);
2979 return len;
2980 }
2981
2982 while (size && (PAGE_SIZE - len)) {
2983 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2984 PAGE_SIZE - len, 1);
2985 len = strlen(buf);
2986 if (PAGE_SIZE - len)
2987 buf[len++] = '\n';
2988
2989 ofs += 16;
2990 size -= min(size, 16U);
2991 }
2992
2993 return len;
2994 }
2995
2996 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2997
2998
2999 /*****************************************************************************
3000 *
3001 * driver setup and teardown
3002 *
3003 *****************************************************************************/
3004
3005 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3006 {
3007 priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3008
3009 init_waitqueue_head(&priv->wait_command_queue);
3010
3011 INIT_WORK(&priv->up, iwl_bg_up);
3012 INIT_WORK(&priv->restart, iwl_bg_restart);
3013 INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3014 INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3015 INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3016 INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3017 INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3018 INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3019
3020 iwl_setup_scan_deferred_work(priv);
3021 iwl_setup_power_deferred_work(priv);
3022
3023 if (priv->cfg->ops->lib->setup_deferred_work)
3024 priv->cfg->ops->lib->setup_deferred_work(priv);
3025
3026 init_timer(&priv->statistics_periodic);
3027 priv->statistics_periodic.data = (unsigned long)priv;
3028 priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3029
3030 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3031 iwl_irq_tasklet, (unsigned long)priv);
3032 }
3033
3034 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3035 {
3036 if (priv->cfg->ops->lib->cancel_deferred_work)
3037 priv->cfg->ops->lib->cancel_deferred_work(priv);
3038
3039 cancel_delayed_work_sync(&priv->init_alive_start);
3040 cancel_delayed_work(&priv->scan_check);
3041 cancel_delayed_work_sync(&priv->set_power_save);
3042 cancel_delayed_work(&priv->alive_start);
3043 cancel_work_sync(&priv->beacon_update);
3044 del_timer_sync(&priv->statistics_periodic);
3045 }
3046
3047 static struct attribute *iwl_sysfs_entries[] = {
3048 &dev_attr_flags.attr,
3049 &dev_attr_filter_flags.attr,
3050 &dev_attr_power_level.attr,
3051 &dev_attr_statistics.attr,
3052 &dev_attr_temperature.attr,
3053 &dev_attr_tx_power.attr,
3054 #ifdef CONFIG_IWLWIFI_DEBUG
3055 &dev_attr_debug_level.attr,
3056 #endif
3057 &dev_attr_version.attr,
3058
3059 NULL
3060 };
3061
3062 static struct attribute_group iwl_attribute_group = {
3063 .name = NULL, /* put in device directory */
3064 .attrs = iwl_sysfs_entries,
3065 };
3066
3067 static struct ieee80211_ops iwl_hw_ops = {
3068 .tx = iwl_mac_tx,
3069 .start = iwl_mac_start,
3070 .stop = iwl_mac_stop,
3071 .add_interface = iwl_mac_add_interface,
3072 .remove_interface = iwl_mac_remove_interface,
3073 .config = iwl_mac_config,
3074 .config_interface = iwl_mac_config_interface,
3075 .configure_filter = iwl_configure_filter,
3076 .set_key = iwl_mac_set_key,
3077 .update_tkip_key = iwl_mac_update_tkip_key,
3078 .get_stats = iwl_mac_get_stats,
3079 .get_tx_stats = iwl_mac_get_tx_stats,
3080 .conf_tx = iwl_mac_conf_tx,
3081 .reset_tsf = iwl_mac_reset_tsf,
3082 .bss_info_changed = iwl_bss_info_changed,
3083 .ampdu_action = iwl_mac_ampdu_action,
3084 .hw_scan = iwl_mac_hw_scan
3085 };
3086
3087 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3088 {
3089 int err = 0;
3090 struct iwl_priv *priv;
3091 struct ieee80211_hw *hw;
3092 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3093 unsigned long flags;
3094 u16 pci_cmd;
3095
3096 /************************
3097 * 1. Allocating HW data
3098 ************************/
3099
3100 /* Disabling hardware scan means that mac80211 will perform scans
3101 * "the hard way", rather than using device's scan. */
3102 if (cfg->mod_params->disable_hw_scan) {
3103 if (cfg->mod_params->debug & IWL_DL_INFO)
3104 dev_printk(KERN_DEBUG, &(pdev->dev),
3105 "Disabling hw_scan\n");
3106 iwl_hw_ops.hw_scan = NULL;
3107 }
3108
3109 hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3110 if (!hw) {
3111 err = -ENOMEM;
3112 goto out;
3113 }
3114 priv = hw->priv;
3115 /* At this point both hw and priv are allocated. */
3116
3117 SET_IEEE80211_DEV(hw, &pdev->dev);
3118
3119 IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3120 priv->cfg = cfg;
3121 priv->pci_dev = pdev;
3122
3123 #ifdef CONFIG_IWLWIFI_DEBUG
3124 priv->debug_level = priv->cfg->mod_params->debug;
3125 atomic_set(&priv->restrict_refcnt, 0);
3126 #endif
3127
3128 /**************************
3129 * 2. Initializing PCI bus
3130 **************************/
3131 if (pci_enable_device(pdev)) {
3132 err = -ENODEV;
3133 goto out_ieee80211_free_hw;
3134 }
3135
3136 pci_set_master(pdev);
3137
3138 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3139 if (!err)
3140 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3141 if (err) {
3142 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3143 if (!err)
3144 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3145 /* both attempts failed: */
3146 if (err) {
3147 IWL_WARN(priv, "No suitable DMA available.\n");
3148 goto out_pci_disable_device;
3149 }
3150 }
3151
3152 err = pci_request_regions(pdev, DRV_NAME);
3153 if (err)
3154 goto out_pci_disable_device;
3155
3156 pci_set_drvdata(pdev, priv);
3157
3158
3159 /***********************
3160 * 3. Read REV register
3161 ***********************/
3162 priv->hw_base = pci_iomap(pdev, 0, 0);
3163 if (!priv->hw_base) {
3164 err = -ENODEV;
3165 goto out_pci_release_regions;
3166 }
3167
3168 IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3169 (unsigned long long) pci_resource_len(pdev, 0));
3170 IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3171
3172 iwl_hw_detect(priv);
3173 IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3174 priv->cfg->name, priv->hw_rev);
3175
3176 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3177 * PCI Tx retries from interfering with C3 CPU state */
3178 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3179
3180 /* amp init */
3181 err = priv->cfg->ops->lib->apm_ops.init(priv);
3182 if (err < 0) {
3183 IWL_ERR(priv, "Failed to init APMG\n");
3184 goto out_iounmap;
3185 }
3186 /*****************
3187 * 4. Read EEPROM
3188 *****************/
3189 /* Read the EEPROM */
3190 err = iwl_eeprom_init(priv);
3191 if (err) {
3192 IWL_ERR(priv, "Unable to init EEPROM\n");
3193 goto out_iounmap;
3194 }
3195 err = iwl_eeprom_check_version(priv);
3196 if (err)
3197 goto out_free_eeprom;
3198
3199 /* extract MAC Address */
3200 iwl_eeprom_get_mac(priv, priv->mac_addr);
3201 IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3202 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3203
3204 /************************
3205 * 5. Setup HW constants
3206 ************************/
3207 if (iwl_set_hw_params(priv)) {
3208 IWL_ERR(priv, "failed to set hw parameters\n");
3209 goto out_free_eeprom;
3210 }
3211
3212 /*******************
3213 * 6. Setup priv
3214 *******************/
3215
3216 err = iwl_init_drv(priv);
3217 if (err)
3218 goto out_free_eeprom;
3219 /* At this point both hw and priv are initialized. */
3220
3221 /**********************************
3222 * 7. Initialize module parameters
3223 **********************************/
3224
3225 /* Disable radio (SW RF KILL) via parameter when loading driver */
3226 if (priv->cfg->mod_params->disable) {
3227 set_bit(STATUS_RF_KILL_SW, &priv->status);
3228 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3229 }
3230
3231 /********************
3232 * 8. Setup services
3233 ********************/
3234 spin_lock_irqsave(&priv->lock, flags);
3235 iwl_disable_interrupts(priv);
3236 spin_unlock_irqrestore(&priv->lock, flags);
3237
3238 pci_enable_msi(priv->pci_dev);
3239
3240 err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3241 DRV_NAME, priv);
3242 if (err) {
3243 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3244 goto out_disable_msi;
3245 }
3246 err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3247 if (err) {
3248 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3249 goto out_free_irq;
3250 }
3251
3252 iwl_setup_deferred_work(priv);
3253 iwl_setup_rx_handlers(priv);
3254
3255 /**********************************
3256 * 9. Setup and register mac80211
3257 **********************************/
3258
3259 /* enable interrupts if needed: hw bug w/a */
3260 pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3261 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3262 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3263 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3264 }
3265
3266 iwl_enable_interrupts(priv);
3267
3268 err = iwl_setup_mac(priv);
3269 if (err)
3270 goto out_remove_sysfs;
3271
3272 err = iwl_dbgfs_register(priv, DRV_NAME);
3273 if (err)
3274 IWL_ERR(priv, "failed to create debugfs files\n");
3275
3276 /* If platform's RF_KILL switch is NOT set to KILL */
3277 if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3278 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3279 else
3280 set_bit(STATUS_RF_KILL_HW, &priv->status);
3281
3282 err = iwl_rfkill_init(priv);
3283 if (err)
3284 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3285 "Ignoring error: %d\n", err);
3286 else
3287 iwl_rfkill_set_hw_state(priv);
3288
3289 iwl_power_initialize(priv);
3290 return 0;
3291
3292 out_remove_sysfs:
3293 destroy_workqueue(priv->workqueue);
3294 priv->workqueue = NULL;
3295 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3296 out_free_irq:
3297 free_irq(priv->pci_dev->irq, priv);
3298 out_disable_msi:
3299 pci_disable_msi(priv->pci_dev);
3300 iwl_uninit_drv(priv);
3301 out_free_eeprom:
3302 iwl_eeprom_free(priv);
3303 out_iounmap:
3304 pci_iounmap(pdev, priv->hw_base);
3305 out_pci_release_regions:
3306 pci_set_drvdata(pdev, NULL);
3307 pci_release_regions(pdev);
3308 out_pci_disable_device:
3309 pci_disable_device(pdev);
3310 out_ieee80211_free_hw:
3311 ieee80211_free_hw(priv->hw);
3312 out:
3313 return err;
3314 }
3315
3316 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3317 {
3318 struct iwl_priv *priv = pci_get_drvdata(pdev);
3319 unsigned long flags;
3320
3321 if (!priv)
3322 return;
3323
3324 IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3325
3326 iwl_dbgfs_unregister(priv);
3327 sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3328
3329 /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3330 * to be called and iwl_down since we are removing the device
3331 * we need to set STATUS_EXIT_PENDING bit.
3332 */
3333 set_bit(STATUS_EXIT_PENDING, &priv->status);
3334 if (priv->mac80211_registered) {
3335 ieee80211_unregister_hw(priv->hw);
3336 priv->mac80211_registered = 0;
3337 } else {
3338 iwl_down(priv);
3339 }
3340
3341 /* make sure we flush any pending irq or
3342 * tasklet for the driver
3343 */
3344 spin_lock_irqsave(&priv->lock, flags);
3345 iwl_disable_interrupts(priv);
3346 spin_unlock_irqrestore(&priv->lock, flags);
3347
3348 iwl_synchronize_irq(priv);
3349
3350 iwl_rfkill_unregister(priv);
3351 iwl_dealloc_ucode_pci(priv);
3352
3353 if (priv->rxq.bd)
3354 iwl_rx_queue_free(priv, &priv->rxq);
3355 iwl_hw_txq_ctx_free(priv);
3356
3357 iwl_clear_stations_table(priv);
3358 iwl_eeprom_free(priv);
3359
3360
3361 /*netif_stop_queue(dev); */
3362 flush_workqueue(priv->workqueue);
3363
3364 /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3365 * priv->workqueue... so we can't take down the workqueue
3366 * until now... */
3367 destroy_workqueue(priv->workqueue);
3368 priv->workqueue = NULL;
3369
3370 free_irq(priv->pci_dev->irq, priv);
3371 pci_disable_msi(priv->pci_dev);
3372 pci_iounmap(pdev, priv->hw_base);
3373 pci_release_regions(pdev);
3374 pci_disable_device(pdev);
3375 pci_set_drvdata(pdev, NULL);
3376
3377 iwl_uninit_drv(priv);
3378
3379 if (priv->ibss_beacon)
3380 dev_kfree_skb(priv->ibss_beacon);
3381
3382 ieee80211_free_hw(priv->hw);
3383 }
3384
3385
3386 /*****************************************************************************
3387 *
3388 * driver and module entry point
3389 *
3390 *****************************************************************************/
3391
3392 /* Hardware specific file defines the PCI IDs table for that hardware module */
3393 static struct pci_device_id iwl_hw_card_ids[] = {
3394 #ifdef CONFIG_IWL4965
3395 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3396 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3397 #endif /* CONFIG_IWL4965 */
3398 #ifdef CONFIG_IWL5000
3399 {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3400 {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3401 {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3402 {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3403 {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3404 {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3405 {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3406 {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3407 {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3408 {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3409 /* 5350 WiFi/WiMax */
3410 {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3411 {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3412 {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3413 /* 5150 Wifi/WiMax */
3414 {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3415 {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3416 /* 6000/6050 Series */
3417 {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3418 {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3419 {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3420 {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3421 {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3422 {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3423 {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3424 {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3425 {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3426 {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3427 {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3428 /* 1000 Series WiFi */
3429 {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3430 {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3431 #endif /* CONFIG_IWL5000 */
3432
3433 {0}
3434 };
3435 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3436
3437 static struct pci_driver iwl_driver = {
3438 .name = DRV_NAME,
3439 .id_table = iwl_hw_card_ids,
3440 .probe = iwl_pci_probe,
3441 .remove = __devexit_p(iwl_pci_remove),
3442 #ifdef CONFIG_PM
3443 .suspend = iwl_pci_suspend,
3444 .resume = iwl_pci_resume,
3445 #endif
3446 };
3447
3448 static int __init iwl_init(void)
3449 {
3450
3451 int ret;
3452 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3453 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3454
3455 ret = iwlagn_rate_control_register();
3456 if (ret) {
3457 printk(KERN_ERR DRV_NAME
3458 "Unable to register rate control algorithm: %d\n", ret);
3459 return ret;
3460 }
3461
3462 ret = pci_register_driver(&iwl_driver);
3463 if (ret) {
3464 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3465 goto error_register;
3466 }
3467
3468 return ret;
3469
3470 error_register:
3471 iwlagn_rate_control_unregister();
3472 return ret;
3473 }
3474
3475 static void __exit iwl_exit(void)
3476 {
3477 pci_unregister_driver(&iwl_driver);
3478 iwlagn_rate_control_unregister();
3479 }
3480
3481 module_exit(iwl_exit);
3482 module_init(iwl_init);
Linux kernel - Deliverables
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