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iwlwifi: introduce host commands callbacks
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / iwl4965-base.c
blob249af4156c1321a3de51715dcdcfaa4e22d438b6
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2008 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 * James P. Ketrenos <ipw2100-admin@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/version.h>
33 #include <linux/init.h>
34 #include <linux/pci.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/delay.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #include "iwl-eeprom.h"
49 #include "iwl-4965.h"
50 #include "iwl-core.h"
51 #include "iwl-io.h"
52 #include "iwl-helpers.h"
53 #include "iwl-sta.h"
54
55 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
56 struct iwl4965_tx_queue *txq);
57
58 /******************************************************************************
59 *
60 * module boiler plate
61 *
62 ******************************************************************************/
63
64 /*
65 * module name, copyright, version, etc.
66 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
67 */
68
69 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
70
71 #ifdef CONFIG_IWLWIFI_DEBUG
72 #define VD "d"
73 #else
74 #define VD
75 #endif
76
77 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
78 #define VS "s"
79 #else
80 #define VS
81 #endif
82
83 #define DRV_VERSION IWLWIFI_VERSION VD VS
84
85
86 MODULE_DESCRIPTION(DRV_DESCRIPTION);
87 MODULE_VERSION(DRV_VERSION);
88 MODULE_AUTHOR(DRV_COPYRIGHT);
89 MODULE_LICENSE("GPL");
90
91 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
92 {
93 u16 fc = le16_to_cpu(hdr->frame_control);
94 int hdr_len = ieee80211_get_hdrlen(fc);
95
96 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
97 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
98 return NULL;
99 }
100
101 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
102 struct iwl_priv *priv, enum ieee80211_band band)
103 {
104 return priv->hw->wiphy->bands[band];
105 }
106
107 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
108 {
109 /* Single white space is for Linksys APs */
110 if (essid_len == 1 && essid[0] == ' ')
111 return 1;
112
113 /* Otherwise, if the entire essid is 0, we assume it is hidden */
114 while (essid_len) {
115 essid_len--;
116 if (essid[essid_len] != '\0')
117 return 0;
118 }
119
120 return 1;
121 }
122
123 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
124 {
125 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
126 const char *s = essid;
127 char *d = escaped;
128
129 if (iwl4965_is_empty_essid(essid, essid_len)) {
130 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
131 return escaped;
132 }
133
134 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
135 while (essid_len--) {
136 if (*s == '\0') {
137 *d++ = '\\';
138 *d++ = '0';
139 s++;
140 } else
141 *d++ = *s++;
142 }
143 *d = '\0';
144 return escaped;
145 }
146
147 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
148 * DMA services
149 *
150 * Theory of operation
151 *
152 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
153 * of buffer descriptors, each of which points to one or more data buffers for
154 * the device to read from or fill. Driver and device exchange status of each
155 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
156 * entries in each circular buffer, to protect against confusing empty and full
157 * queue states.
158 *
159 * The device reads or writes the data in the queues via the device's several
160 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
161 *
162 * For Tx queue, there are low mark and high mark limits. If, after queuing
163 * the packet for Tx, free space become < low mark, Tx queue stopped. When
164 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
165 * Tx queue resumed.
166 *
167 * The 4965 operates with up to 17 queues: One receive queue, one transmit
168 * queue (#4) for sending commands to the device firmware, and 15 other
169 * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
170 *
171 * See more detailed info in iwl-4965-hw.h.
172 ***************************************************/
173
174 int iwl4965_queue_space(const struct iwl4965_queue *q)
175 {
176 int s = q->read_ptr - q->write_ptr;
177
178 if (q->read_ptr > q->write_ptr)
179 s -= q->n_bd;
180
181 if (s <= 0)
182 s += q->n_window;
183 /* keep some reserve to not confuse empty and full situations */
184 s -= 2;
185 if (s < 0)
186 s = 0;
187 return s;
188 }
189
190
191 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
192 {
193 return q->write_ptr > q->read_ptr ?
194 (i >= q->read_ptr && i < q->write_ptr) :
195 !(i < q->read_ptr && i >= q->write_ptr);
196 }
197
198 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
199 {
200 /* This is for scan command, the big buffer at end of command array */
201 if (is_huge)
202 return q->n_window; /* must be power of 2 */
203
204 /* Otherwise, use normal size buffers */
205 return index & (q->n_window - 1);
206 }
207
208 /**
209 * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
210 */
211 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
212 int count, int slots_num, u32 id)
213 {
214 q->n_bd = count;
215 q->n_window = slots_num;
216 q->id = id;
217
218 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
219 * and iwl_queue_dec_wrap are broken. */
220 BUG_ON(!is_power_of_2(count));
221
222 /* slots_num must be power-of-two size, otherwise
223 * get_cmd_index is broken. */
224 BUG_ON(!is_power_of_2(slots_num));
225
226 q->low_mark = q->n_window / 4;
227 if (q->low_mark < 4)
228 q->low_mark = 4;
229
230 q->high_mark = q->n_window / 8;
231 if (q->high_mark < 2)
232 q->high_mark = 2;
233
234 q->write_ptr = q->read_ptr = 0;
235
236 return 0;
237 }
238
239 /**
240 * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
241 */
242 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
243 struct iwl4965_tx_queue *txq, u32 id)
244 {
245 struct pci_dev *dev = priv->pci_dev;
246
247 /* Driver private data, only for Tx (not command) queues,
248 * not shared with device. */
249 if (id != IWL_CMD_QUEUE_NUM) {
250 txq->txb = kmalloc(sizeof(txq->txb[0]) *
251 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
252 if (!txq->txb) {
253 IWL_ERROR("kmalloc for auxiliary BD "
254 "structures failed\n");
255 goto error;
256 }
257 } else
258 txq->txb = NULL;
259
260 /* Circular buffer of transmit frame descriptors (TFDs),
261 * shared with device */
262 txq->bd = pci_alloc_consistent(dev,
263 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
264 &txq->q.dma_addr);
265
266 if (!txq->bd) {
267 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
268 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
269 goto error;
270 }
271 txq->q.id = id;
272
273 return 0;
274
275 error:
276 if (txq->txb) {
277 kfree(txq->txb);
278 txq->txb = NULL;
279 }
280
281 return -ENOMEM;
282 }
283
284 /**
285 * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
286 */
287 int iwl4965_tx_queue_init(struct iwl_priv *priv,
288 struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
289 {
290 struct pci_dev *dev = priv->pci_dev;
291 int len;
292 int rc = 0;
293
294 /*
295 * Alloc buffer array for commands (Tx or other types of commands).
296 * For the command queue (#4), allocate command space + one big
297 * command for scan, since scan command is very huge; the system will
298 * not have two scans at the same time, so only one is needed.
299 * For normal Tx queues (all other queues), no super-size command
300 * space is needed.
301 */
302 len = sizeof(struct iwl_cmd) * slots_num;
303 if (txq_id == IWL_CMD_QUEUE_NUM)
304 len += IWL_MAX_SCAN_SIZE;
305 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
306 if (!txq->cmd)
307 return -ENOMEM;
308
309 /* Alloc driver data array and TFD circular buffer */
310 rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
311 if (rc) {
312 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
313
314 return -ENOMEM;
315 }
316 txq->need_update = 0;
317
318 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
319 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
320 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
321
322 /* Initialize queue's high/low-water marks, and head/tail indexes */
323 iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
324
325 /* Tell device where to find queue */
326 iwl4965_hw_tx_queue_init(priv, txq);
327
328 return 0;
329 }
330
331 /**
332 * iwl4965_tx_queue_free - Deallocate DMA queue.
333 * @txq: Transmit queue to deallocate.
334 *
335 * Empty queue by removing and destroying all BD's.
336 * Free all buffers.
337 * 0-fill, but do not free "txq" descriptor structure.
338 */
339 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
340 {
341 struct iwl4965_queue *q = &txq->q;
342 struct pci_dev *dev = priv->pci_dev;
343 int len;
344
345 if (q->n_bd == 0)
346 return;
347
348 /* first, empty all BD's */
349 for (; q->write_ptr != q->read_ptr;
350 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
351 iwl4965_hw_txq_free_tfd(priv, txq);
352
353 len = sizeof(struct iwl_cmd) * q->n_window;
354 if (q->id == IWL_CMD_QUEUE_NUM)
355 len += IWL_MAX_SCAN_SIZE;
356
357 /* De-alloc array of command/tx buffers */
358 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
359
360 /* De-alloc circular buffer of TFDs */
361 if (txq->q.n_bd)
362 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
363 txq->q.n_bd, txq->bd, txq->q.dma_addr);
364
365 /* De-alloc array of per-TFD driver data */
366 if (txq->txb) {
367 kfree(txq->txb);
368 txq->txb = NULL;
369 }
370
371 /* 0-fill queue descriptor structure */
372 memset(txq, 0, sizeof(*txq));
373 }
374
375 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
376
377 /*************** STATION TABLE MANAGEMENT ****
378 * mac80211 should be examined to determine if sta_info is duplicating
379 * the functionality provided here
380 */
381
382 /**************************************************************/
383
384 #if 0 /* temporary disable till we add real remove station */
385 /**
386 * iwl4965_remove_station - Remove driver's knowledge of station.
387 *
388 * NOTE: This does not remove station from device's station table.
389 */
390 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
391 {
392 int index = IWL_INVALID_STATION;
393 int i;
394 unsigned long flags;
395
396 spin_lock_irqsave(&priv->sta_lock, flags);
397
398 if (is_ap)
399 index = IWL_AP_ID;
400 else if (is_broadcast_ether_addr(addr))
401 index = priv->hw_params.bcast_sta_id;
402 else
403 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
404 if (priv->stations[i].used &&
405 !compare_ether_addr(priv->stations[i].sta.sta.addr,
406 addr)) {
407 index = i;
408 break;
409 }
410
411 if (unlikely(index == IWL_INVALID_STATION))
412 goto out;
413
414 if (priv->stations[index].used) {
415 priv->stations[index].used = 0;
416 priv->num_stations--;
417 }
418
419 BUG_ON(priv->num_stations < 0);
420
421 out:
422 spin_unlock_irqrestore(&priv->sta_lock, flags);
423 return 0;
424 }
425 #endif
426
427 /**
428 * iwl4965_add_station_flags - Add station to tables in driver and device
429 */
430 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
431 int is_ap, u8 flags, void *ht_data)
432 {
433 int i;
434 int index = IWL_INVALID_STATION;
435 struct iwl4965_station_entry *station;
436 unsigned long flags_spin;
437 DECLARE_MAC_BUF(mac);
438
439 spin_lock_irqsave(&priv->sta_lock, flags_spin);
440 if (is_ap)
441 index = IWL_AP_ID;
442 else if (is_broadcast_ether_addr(addr))
443 index = priv->hw_params.bcast_sta_id;
444 else
445 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
446 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
447 addr)) {
448 index = i;
449 break;
450 }
451
452 if (!priv->stations[i].used &&
453 index == IWL_INVALID_STATION)
454 index = i;
455 }
456
457
458 /* These two conditions have the same outcome, but keep them separate
459 since they have different meanings */
460 if (unlikely(index == IWL_INVALID_STATION)) {
461 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
462 return index;
463 }
464
465 if (priv->stations[index].used &&
466 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
467 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
468 return index;
469 }
470
471
472 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
473 station = &priv->stations[index];
474 station->used = 1;
475 priv->num_stations++;
476
477 /* Set up the REPLY_ADD_STA command to send to device */
478 memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
479 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
480 station->sta.mode = 0;
481 station->sta.sta.sta_id = index;
482 station->sta.station_flags = 0;
483
484 #ifdef CONFIG_IWL4965_HT
485 /* BCAST station and IBSS stations do not work in HT mode */
486 if (index != priv->hw_params.bcast_sta_id &&
487 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
488 iwl4965_set_ht_add_station(priv, index,
489 (struct ieee80211_ht_info *) ht_data);
490 #endif /*CONFIG_IWL4965_HT*/
491
492 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
493
494 /* Add station to device's station table */
495 iwl4965_send_add_station(priv, &station->sta, flags);
496 return index;
497
498 }
499
500
501
502 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
503
504 /**
505 * iwl4965_enqueue_hcmd - enqueue a uCode command
506 * @priv: device private data point
507 * @cmd: a point to the ucode command structure
508 *
509 * The function returns < 0 values to indicate the operation is
510 * failed. On success, it turns the index (> 0) of command in the
511 * command queue.
512 */
513 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
514 {
515 struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
516 struct iwl4965_queue *q = &txq->q;
517 struct iwl4965_tfd_frame *tfd;
518 u32 *control_flags;
519 struct iwl_cmd *out_cmd;
520 u32 idx;
521 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
522 dma_addr_t phys_addr;
523 int ret;
524 unsigned long flags;
525
526 /* If any of the command structures end up being larger than
527 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
528 * we will need to increase the size of the TFD entries */
529 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
530 !(cmd->meta.flags & CMD_SIZE_HUGE));
531
532 if (iwl_is_rfkill(priv)) {
533 IWL_DEBUG_INFO("Not sending command - RF KILL");
534 return -EIO;
535 }
536
537 if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
538 IWL_ERROR("No space for Tx\n");
539 return -ENOSPC;
540 }
541
542 spin_lock_irqsave(&priv->hcmd_lock, flags);
543
544 tfd = &txq->bd[q->write_ptr];
545 memset(tfd, 0, sizeof(*tfd));
546
547 control_flags = (u32 *) tfd;
548
549 idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
550 out_cmd = &txq->cmd[idx];
551
552 out_cmd->hdr.cmd = cmd->id;
553 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
554 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
555
556 /* At this point, the out_cmd now has all of the incoming cmd
557 * information */
558
559 out_cmd->hdr.flags = 0;
560 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
561 INDEX_TO_SEQ(q->write_ptr));
562 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
563 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
564
565 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
566 offsetof(struct iwl_cmd, hdr);
567 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
568
569 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
570 "%d bytes at %d[%d]:%d\n",
571 get_cmd_string(out_cmd->hdr.cmd),
572 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
573 fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
574
575 txq->need_update = 1;
576
577 /* Set up entry in queue's byte count circular buffer */
578 priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
579
580 /* Increment and update queue's write index */
581 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
582 ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
583
584 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
585 return ret ? ret : idx;
586 }
587
588 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
589 {
590 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
591
592 if (hw_decrypt)
593 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
594 else
595 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
596
597 }
598
599 /**
600 * iwl4965_rxon_add_station - add station into station table.
601 *
602 * there is only one AP station with id= IWL_AP_ID
603 * NOTE: mutex must be held before calling this fnction
604 */
605 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
606 const u8 *addr, int is_ap)
607 {
608 u8 sta_id;
609
610 /* Add station to device's station table */
611 #ifdef CONFIG_IWL4965_HT
612 struct ieee80211_conf *conf = &priv->hw->conf;
613 struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
614
615 if ((is_ap) &&
616 (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
617 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
618 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
619 0, cur_ht_config);
620 else
621 #endif /* CONFIG_IWL4965_HT */
622 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
623 0, NULL);
624
625 /* Set up default rate scaling table in device's station table */
626 iwl4965_add_station(priv, addr, is_ap);
627
628 return sta_id;
629 }
630
631 /**
632 * iwl4965_check_rxon_cmd - validate RXON structure is valid
633 *
634 * NOTE: This is really only useful during development and can eventually
635 * be #ifdef'd out once the driver is stable and folks aren't actively
636 * making changes
637 */
638 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
639 {
640 int error = 0;
641 int counter = 1;
642
643 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
644 error |= le32_to_cpu(rxon->flags &
645 (RXON_FLG_TGJ_NARROW_BAND_MSK |
646 RXON_FLG_RADAR_DETECT_MSK));
647 if (error)
648 IWL_WARNING("check 24G fields %d | %d\n",
649 counter++, error);
650 } else {
651 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
652 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
653 if (error)
654 IWL_WARNING("check 52 fields %d | %d\n",
655 counter++, error);
656 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
657 if (error)
658 IWL_WARNING("check 52 CCK %d | %d\n",
659 counter++, error);
660 }
661 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
662 if (error)
663 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
664
665 /* make sure basic rates 6Mbps and 1Mbps are supported */
666 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
667 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
668 if (error)
669 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
670
671 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
672 if (error)
673 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
674
675 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
676 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
677 if (error)
678 IWL_WARNING("check CCK and short slot %d | %d\n",
679 counter++, error);
680
681 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
682 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
683 if (error)
684 IWL_WARNING("check CCK & auto detect %d | %d\n",
685 counter++, error);
686
687 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
688 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
689 if (error)
690 IWL_WARNING("check TGG and auto detect %d | %d\n",
691 counter++, error);
692
693 if (error)
694 IWL_WARNING("Tuning to channel %d\n",
695 le16_to_cpu(rxon->channel));
696
697 if (error) {
698 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
699 return -1;
700 }
701 return 0;
702 }
703
704 /**
705 * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
706 * @priv: staging_rxon is compared to active_rxon
707 *
708 * If the RXON structure is changing enough to require a new tune,
709 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
710 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
711 */
712 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
713 {
714
715 /* These items are only settable from the full RXON command */
716 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
717 compare_ether_addr(priv->staging_rxon.bssid_addr,
718 priv->active_rxon.bssid_addr) ||
719 compare_ether_addr(priv->staging_rxon.node_addr,
720 priv->active_rxon.node_addr) ||
721 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
722 priv->active_rxon.wlap_bssid_addr) ||
723 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
724 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
725 (priv->staging_rxon.air_propagation !=
726 priv->active_rxon.air_propagation) ||
727 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
728 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
729 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
730 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
731 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
732 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
733 return 1;
734
735 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
736 * be updated with the RXON_ASSOC command -- however only some
737 * flag transitions are allowed using RXON_ASSOC */
738
739 /* Check if we are not switching bands */
740 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
741 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
742 return 1;
743
744 /* Check if we are switching association toggle */
745 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
746 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
747 return 1;
748
749 return 0;
750 }
751
752 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
753 {
754 int ret = 0;
755 struct iwl4965_rxon_assoc_cmd rxon_assoc;
756 const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
757 const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
758
759 if ((rxon1->flags == rxon2->flags) &&
760 (rxon1->filter_flags == rxon2->filter_flags) &&
761 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
762 (rxon1->ofdm_ht_single_stream_basic_rates ==
763 rxon2->ofdm_ht_single_stream_basic_rates) &&
764 (rxon1->ofdm_ht_dual_stream_basic_rates ==
765 rxon2->ofdm_ht_dual_stream_basic_rates) &&
766 (rxon1->rx_chain == rxon2->rx_chain) &&
767 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
768 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
769 return 0;
770 }
771
772 rxon_assoc.flags = priv->staging_rxon.flags;
773 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
774 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
775 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
776 rxon_assoc.reserved = 0;
777 rxon_assoc.ofdm_ht_single_stream_basic_rates =
778 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
779 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
780 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
781 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
782
783 ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
784 sizeof(rxon_assoc), &rxon_assoc, NULL);
785 if (ret)
786 return ret;
787
788 return ret;
789 }
790
791 /**
792 * iwl4965_commit_rxon - commit staging_rxon to hardware
793 *
794 * The RXON command in staging_rxon is committed to the hardware and
795 * the active_rxon structure is updated with the new data. This
796 * function correctly transitions out of the RXON_ASSOC_MSK state if
797 * a HW tune is required based on the RXON structure changes.
798 */
799 static int iwl4965_commit_rxon(struct iwl_priv *priv)
800 {
801 /* cast away the const for active_rxon in this function */
802 struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
803 DECLARE_MAC_BUF(mac);
804 int rc = 0;
805
806 if (!iwl_is_alive(priv))
807 return -1;
808
809 /* always get timestamp with Rx frame */
810 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
811
812 rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
813 if (rc) {
814 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
815 return -EINVAL;
816 }
817
818 /* If we don't need to send a full RXON, we can use
819 * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
820 * and other flags for the current radio configuration. */
821 if (!iwl4965_full_rxon_required(priv)) {
822 rc = iwl4965_send_rxon_assoc(priv);
823 if (rc) {
824 IWL_ERROR("Error setting RXON_ASSOC "
825 "configuration (%d).\n", rc);
826 return rc;
827 }
828
829 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
830
831 return 0;
832 }
833
834 /* station table will be cleared */
835 priv->assoc_station_added = 0;
836
837 #ifdef CONFIG_IWL4965_SENSITIVITY
838 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
839 if (!priv->error_recovering)
840 priv->start_calib = 0;
841
842 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
843 #endif /* CONFIG_IWL4965_SENSITIVITY */
844
845 /* If we are currently associated and the new config requires
846 * an RXON_ASSOC and the new config wants the associated mask enabled,
847 * we must clear the associated from the active configuration
848 * before we apply the new config */
849 if (iwl_is_associated(priv) &&
850 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
851 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
852 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
853
854 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
855 sizeof(struct iwl4965_rxon_cmd),
856 &priv->active_rxon);
857
858 /* If the mask clearing failed then we set
859 * active_rxon back to what it was previously */
860 if (rc) {
861 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
862 IWL_ERROR("Error clearing ASSOC_MSK on current "
863 "configuration (%d).\n", rc);
864 return rc;
865 }
866 }
867
868 IWL_DEBUG_INFO("Sending RXON\n"
869 "* with%s RXON_FILTER_ASSOC_MSK\n"
870 "* channel = %d\n"
871 "* bssid = %s\n",
872 ((priv->staging_rxon.filter_flags &
873 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
874 le16_to_cpu(priv->staging_rxon.channel),
875 print_mac(mac, priv->staging_rxon.bssid_addr));
876
877 iwl4965_set_rxon_hwcrypto(priv, priv->cfg->mod_params->hw_crypto);
878 /* Apply the new configuration */
879 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
880 sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
881 if (rc) {
882 IWL_ERROR("Error setting new configuration (%d).\n", rc);
883 return rc;
884 }
885
886 iwlcore_clear_stations_table(priv);
887
888 #ifdef CONFIG_IWL4965_SENSITIVITY
889 if (!priv->error_recovering)
890 priv->start_calib = 0;
891
892 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
893 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
894 #endif /* CONFIG_IWL4965_SENSITIVITY */
895
896 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
897
898 /* If we issue a new RXON command which required a tune then we must
899 * send a new TXPOWER command or we won't be able to Tx any frames */
900 rc = iwl4965_hw_reg_send_txpower(priv);
901 if (rc) {
902 IWL_ERROR("Error setting Tx power (%d).\n", rc);
903 return rc;
904 }
905
906 /* Add the broadcast address so we can send broadcast frames */
907 if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
908 IWL_INVALID_STATION) {
909 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
910 return -EIO;
911 }
912
913 /* If we have set the ASSOC_MSK and we are in BSS mode then
914 * add the IWL_AP_ID to the station rate table */
915 if (iwl_is_associated(priv) &&
916 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
917 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
918 == IWL_INVALID_STATION) {
919 IWL_ERROR("Error adding AP address for transmit.\n");
920 return -EIO;
921 }
922 priv->assoc_station_added = 1;
923 if (priv->default_wep_key &&
924 iwl_send_static_wepkey_cmd(priv, 0))
925 IWL_ERROR("Could not send WEP static key.\n");
926 }
927
928 return 0;
929 }
930
931 static int iwl4965_send_bt_config(struct iwl_priv *priv)
932 {
933 struct iwl4965_bt_cmd bt_cmd = {
934 .flags = 3,
935 .lead_time = 0xAA,
936 .max_kill = 1,
937 .kill_ack_mask = 0,
938 .kill_cts_mask = 0,
939 };
940
941 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
942 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
943 }
944
945 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
946 {
947 int rc = 0;
948 struct iwl4965_rx_packet *res;
949 struct iwl_host_cmd cmd = {
950 .id = REPLY_SCAN_ABORT_CMD,
951 .meta.flags = CMD_WANT_SKB,
952 };
953
954 /* If there isn't a scan actively going on in the hardware
955 * then we are in between scan bands and not actually
956 * actively scanning, so don't send the abort command */
957 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
958 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
959 return 0;
960 }
961
962 rc = iwl_send_cmd_sync(priv, &cmd);
963 if (rc) {
964 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
965 return rc;
966 }
967
968 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
969 if (res->u.status != CAN_ABORT_STATUS) {
970 /* The scan abort will return 1 for success or
971 * 2 for "failure". A failure condition can be
972 * due to simply not being in an active scan which
973 * can occur if we send the scan abort before we
974 * the microcode has notified us that a scan is
975 * completed. */
976 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
977 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
978 clear_bit(STATUS_SCAN_HW, &priv->status);
979 }
980
981 dev_kfree_skb_any(cmd.meta.u.skb);
982
983 return rc;
984 }
985
986 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
987 struct iwl_cmd *cmd,
988 struct sk_buff *skb)
989 {
990 return 1;
991 }
992
993 /*
994 * CARD_STATE_CMD
995 *
996 * Use: Sets the device's internal card state to enable, disable, or halt
997 *
998 * When in the 'enable' state the card operates as normal.
999 * When in the 'disable' state, the card enters into a low power mode.
1000 * When in the 'halt' state, the card is shut down and must be fully
1001 * restarted to come back on.
1002 */
1003 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1004 {
1005 struct iwl_host_cmd cmd = {
1006 .id = REPLY_CARD_STATE_CMD,
1007 .len = sizeof(u32),
1008 .data = &flags,
1009 .meta.flags = meta_flag,
1010 };
1011
1012 if (meta_flag & CMD_ASYNC)
1013 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1014
1015 return iwl_send_cmd(priv, &cmd);
1016 }
1017
1018 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
1019 struct iwl_cmd *cmd, struct sk_buff *skb)
1020 {
1021 struct iwl4965_rx_packet *res = NULL;
1022
1023 if (!skb) {
1024 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1025 return 1;
1026 }
1027
1028 res = (struct iwl4965_rx_packet *)skb->data;
1029 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1030 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1031 res->hdr.flags);
1032 return 1;
1033 }
1034
1035 switch (res->u.add_sta.status) {
1036 case ADD_STA_SUCCESS_MSK:
1037 break;
1038 default:
1039 break;
1040 }
1041
1042 /* We didn't cache the SKB; let the caller free it */
1043 return 1;
1044 }
1045
1046 int iwl4965_send_add_station(struct iwl_priv *priv,
1047 struct iwl4965_addsta_cmd *sta, u8 flags)
1048 {
1049 struct iwl4965_rx_packet *res = NULL;
1050 int rc = 0;
1051 struct iwl_host_cmd cmd = {
1052 .id = REPLY_ADD_STA,
1053 .len = sizeof(struct iwl4965_addsta_cmd),
1054 .meta.flags = flags,
1055 .data = sta,
1056 };
1057
1058 if (flags & CMD_ASYNC)
1059 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1060 else
1061 cmd.meta.flags |= CMD_WANT_SKB;
1062
1063 rc = iwl_send_cmd(priv, &cmd);
1064
1065 if (rc || (flags & CMD_ASYNC))
1066 return rc;
1067
1068 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1069 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1070 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1071 res->hdr.flags);
1072 rc = -EIO;
1073 }
1074
1075 if (rc == 0) {
1076 switch (res->u.add_sta.status) {
1077 case ADD_STA_SUCCESS_MSK:
1078 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1079 break;
1080 default:
1081 rc = -EIO;
1082 IWL_WARNING("REPLY_ADD_STA failed\n");
1083 break;
1084 }
1085 }
1086
1087 priv->alloc_rxb_skb--;
1088 dev_kfree_skb_any(cmd.meta.u.skb);
1089
1090 return rc;
1091 }
1092
1093 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1094 {
1095 struct list_head *element;
1096
1097 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1098 priv->frames_count);
1099
1100 while (!list_empty(&priv->free_frames)) {
1101 element = priv->free_frames.next;
1102 list_del(element);
1103 kfree(list_entry(element, struct iwl4965_frame, list));
1104 priv->frames_count--;
1105 }
1106
1107 if (priv->frames_count) {
1108 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1109 priv->frames_count);
1110 priv->frames_count = 0;
1111 }
1112 }
1113
1114 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1115 {
1116 struct iwl4965_frame *frame;
1117 struct list_head *element;
1118 if (list_empty(&priv->free_frames)) {
1119 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1120 if (!frame) {
1121 IWL_ERROR("Could not allocate frame!\n");
1122 return NULL;
1123 }
1124
1125 priv->frames_count++;
1126 return frame;
1127 }
1128
1129 element = priv->free_frames.next;
1130 list_del(element);
1131 return list_entry(element, struct iwl4965_frame, list);
1132 }
1133
1134 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1135 {
1136 memset(frame, 0, sizeof(*frame));
1137 list_add(&frame->list, &priv->free_frames);
1138 }
1139
1140 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1141 struct ieee80211_hdr *hdr,
1142 const u8 *dest, int left)
1143 {
1144
1145 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1146 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1147 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1148 return 0;
1149
1150 if (priv->ibss_beacon->len > left)
1151 return 0;
1152
1153 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1154
1155 return priv->ibss_beacon->len;
1156 }
1157
1158 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1159 {
1160 u8 i;
1161
1162 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1163 i = iwl4965_rates[i].next_ieee) {
1164 if (rate_mask & (1 << i))
1165 return iwl4965_rates[i].plcp;
1166 }
1167
1168 return IWL_RATE_INVALID;
1169 }
1170
1171 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1172 {
1173 struct iwl4965_frame *frame;
1174 unsigned int frame_size;
1175 int rc;
1176 u8 rate;
1177
1178 frame = iwl4965_get_free_frame(priv);
1179
1180 if (!frame) {
1181 IWL_ERROR("Could not obtain free frame buffer for beacon "
1182 "command.\n");
1183 return -ENOMEM;
1184 }
1185
1186 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1187 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1188 0xFF0);
1189 if (rate == IWL_INVALID_RATE)
1190 rate = IWL_RATE_6M_PLCP;
1191 } else {
1192 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1193 if (rate == IWL_INVALID_RATE)
1194 rate = IWL_RATE_1M_PLCP;
1195 }
1196
1197 frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1198
1199 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1200 &frame->u.cmd[0]);
1201
1202 iwl4965_free_frame(priv, frame);
1203
1204 return rc;
1205 }
1206
1207 /******************************************************************************
1208 *
1209 * Misc. internal state and helper functions
1210 *
1211 ******************************************************************************/
1212
1213 static void iwl4965_unset_hw_params(struct iwl_priv *priv)
1214 {
1215 if (priv->shared_virt)
1216 pci_free_consistent(priv->pci_dev,
1217 sizeof(struct iwl4965_shared),
1218 priv->shared_virt,
1219 priv->shared_phys);
1220 }
1221
1222 /**
1223 * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1224 *
1225 * return : set the bit for each supported rate insert in ie
1226 */
1227 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1228 u16 basic_rate, int *left)
1229 {
1230 u16 ret_rates = 0, bit;
1231 int i;
1232 u8 *cnt = ie;
1233 u8 *rates = ie + 1;
1234
1235 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1236 if (bit & supported_rate) {
1237 ret_rates |= bit;
1238 rates[*cnt] = iwl4965_rates[i].ieee |
1239 ((bit & basic_rate) ? 0x80 : 0x00);
1240 (*cnt)++;
1241 (*left)--;
1242 if ((*left <= 0) ||
1243 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1244 break;
1245 }
1246 }
1247
1248 return ret_rates;
1249 }
1250
1251 /**
1252 * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1253 */
1254 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1255 enum ieee80211_band band,
1256 struct ieee80211_mgmt *frame,
1257 int left, int is_direct)
1258 {
1259 int len = 0;
1260 u8 *pos = NULL;
1261 u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1262 #ifdef CONFIG_IWL4965_HT
1263 const struct ieee80211_supported_band *sband =
1264 iwl4965_get_hw_mode(priv, band);
1265 #endif /* CONFIG_IWL4965_HT */
1266
1267 /* Make sure there is enough space for the probe request,
1268 * two mandatory IEs and the data */
1269 left -= 24;
1270 if (left < 0)
1271 return 0;
1272 len += 24;
1273
1274 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1275 memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1276 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1277 memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1278 frame->seq_ctrl = 0;
1279
1280 /* fill in our indirect SSID IE */
1281 /* ...next IE... */
1282
1283 left -= 2;
1284 if (left < 0)
1285 return 0;
1286 len += 2;
1287 pos = &(frame->u.probe_req.variable[0]);
1288 *pos++ = WLAN_EID_SSID;
1289 *pos++ = 0;
1290
1291 /* fill in our direct SSID IE... */
1292 if (is_direct) {
1293 /* ...next IE... */
1294 left -= 2 + priv->essid_len;
1295 if (left < 0)
1296 return 0;
1297 /* ... fill it in... */
1298 *pos++ = WLAN_EID_SSID;
1299 *pos++ = priv->essid_len;
1300 memcpy(pos, priv->essid, priv->essid_len);
1301 pos += priv->essid_len;
1302 len += 2 + priv->essid_len;
1303 }
1304
1305 /* fill in supported rate */
1306 /* ...next IE... */
1307 left -= 2;
1308 if (left < 0)
1309 return 0;
1310
1311 /* ... fill it in... */
1312 *pos++ = WLAN_EID_SUPP_RATES;
1313 *pos = 0;
1314
1315 /* exclude 60M rate */
1316 active_rates = priv->rates_mask;
1317 active_rates &= ~IWL_RATE_60M_MASK;
1318
1319 active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1320
1321 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1322 ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1323 active_rate_basic, &left);
1324 active_rates &= ~ret_rates;
1325
1326 ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1327 active_rate_basic, &left);
1328 active_rates &= ~ret_rates;
1329
1330 len += 2 + *pos;
1331 pos += (*pos) + 1;
1332 if (active_rates == 0)
1333 goto fill_end;
1334
1335 /* fill in supported extended rate */
1336 /* ...next IE... */
1337 left -= 2;
1338 if (left < 0)
1339 return 0;
1340 /* ... fill it in... */
1341 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1342 *pos = 0;
1343 iwl4965_supported_rate_to_ie(pos, active_rates,
1344 active_rate_basic, &left);
1345 if (*pos > 0)
1346 len += 2 + *pos;
1347
1348 #ifdef CONFIG_IWL4965_HT
1349 if (sband && sband->ht_info.ht_supported) {
1350 struct ieee80211_ht_cap *ht_cap;
1351 pos += (*pos) + 1;
1352 *pos++ = WLAN_EID_HT_CAPABILITY;
1353 *pos++ = sizeof(struct ieee80211_ht_cap);
1354 ht_cap = (struct ieee80211_ht_cap *)pos;
1355 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1356 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1357 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1358 IEEE80211_HT_CAP_AMPDU_FACTOR) |
1359 ((sband->ht_info.ampdu_density << 2) &
1360 IEEE80211_HT_CAP_AMPDU_DENSITY);
1361 len += 2 + sizeof(struct ieee80211_ht_cap);
1362 }
1363 #endif /*CONFIG_IWL4965_HT */
1364
1365 fill_end:
1366 return (u16)len;
1367 }
1368
1369 /*
1370 * QoS support
1371 */
1372 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1373 struct iwl4965_qosparam_cmd *qos)
1374 {
1375
1376 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1377 sizeof(struct iwl4965_qosparam_cmd), qos);
1378 }
1379
1380 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1381 {
1382 unsigned long flags;
1383
1384 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1385 return;
1386
1387 if (!priv->qos_data.qos_enable)
1388 return;
1389
1390 spin_lock_irqsave(&priv->lock, flags);
1391 priv->qos_data.def_qos_parm.qos_flags = 0;
1392
1393 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1394 !priv->qos_data.qos_cap.q_AP.txop_request)
1395 priv->qos_data.def_qos_parm.qos_flags |=
1396 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1397 if (priv->qos_data.qos_active)
1398 priv->qos_data.def_qos_parm.qos_flags |=
1399 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1400
1401 #ifdef CONFIG_IWL4965_HT
1402 if (priv->current_ht_config.is_ht)
1403 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1404 #endif /* CONFIG_IWL4965_HT */
1405
1406 spin_unlock_irqrestore(&priv->lock, flags);
1407
1408 if (force || iwl_is_associated(priv)) {
1409 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1410 priv->qos_data.qos_active,
1411 priv->qos_data.def_qos_parm.qos_flags);
1412
1413 iwl4965_send_qos_params_command(priv,
1414 &(priv->qos_data.def_qos_parm));
1415 }
1416 }
1417
1418 /*
1419 * Power management (not Tx power!) functions
1420 */
1421 #define MSEC_TO_USEC 1024
1422
1423 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1424 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1425 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1426 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1427 __constant_cpu_to_le32(X1), \
1428 __constant_cpu_to_le32(X2), \
1429 __constant_cpu_to_le32(X3), \
1430 __constant_cpu_to_le32(X4)}
1431
1432
1433 /* default power management (not Tx power) table values */
1434 /* for tim 0-10 */
1435 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1436 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1437 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1438 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1439 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1440 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1441 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1442 };
1443
1444 /* for tim > 10 */
1445 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1446 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1447 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1448 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1449 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1450 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1451 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1452 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1453 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1454 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1455 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1456 };
1457
1458 int iwl4965_power_init_handle(struct iwl_priv *priv)
1459 {
1460 int rc = 0, i;
1461 struct iwl4965_power_mgr *pow_data;
1462 int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1463 u16 pci_pm;
1464
1465 IWL_DEBUG_POWER("Initialize power \n");
1466
1467 pow_data = &(priv->power_data);
1468
1469 memset(pow_data, 0, sizeof(*pow_data));
1470
1471 pow_data->active_index = IWL_POWER_RANGE_0;
1472 pow_data->dtim_val = 0xffff;
1473
1474 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1475 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1476
1477 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1478 if (rc != 0)
1479 return 0;
1480 else {
1481 struct iwl4965_powertable_cmd *cmd;
1482
1483 IWL_DEBUG_POWER("adjust power command flags\n");
1484
1485 for (i = 0; i < IWL_POWER_AC; i++) {
1486 cmd = &pow_data->pwr_range_0[i].cmd;
1487
1488 if (pci_pm & 0x1)
1489 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1490 else
1491 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1492 }
1493 }
1494 return rc;
1495 }
1496
1497 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1498 struct iwl4965_powertable_cmd *cmd, u32 mode)
1499 {
1500 int rc = 0, i;
1501 u8 skip;
1502 u32 max_sleep = 0;
1503 struct iwl4965_power_vec_entry *range;
1504 u8 period = 0;
1505 struct iwl4965_power_mgr *pow_data;
1506
1507 if (mode > IWL_POWER_INDEX_5) {
1508 IWL_DEBUG_POWER("Error invalid power mode \n");
1509 return -1;
1510 }
1511 pow_data = &(priv->power_data);
1512
1513 if (pow_data->active_index == IWL_POWER_RANGE_0)
1514 range = &pow_data->pwr_range_0[0];
1515 else
1516 range = &pow_data->pwr_range_1[1];
1517
1518 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1519
1520 #ifdef IWL_MAC80211_DISABLE
1521 if (priv->assoc_network != NULL) {
1522 unsigned long flags;
1523
1524 period = priv->assoc_network->tim.tim_period;
1525 }
1526 #endif /*IWL_MAC80211_DISABLE */
1527 skip = range[mode].no_dtim;
1528
1529 if (period == 0) {
1530 period = 1;
1531 skip = 0;
1532 }
1533
1534 if (skip == 0) {
1535 max_sleep = period;
1536 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1537 } else {
1538 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1539 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1540 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1541 }
1542
1543 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1544 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1545 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1546 }
1547
1548 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1549 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1550 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1551 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1552 le32_to_cpu(cmd->sleep_interval[0]),
1553 le32_to_cpu(cmd->sleep_interval[1]),
1554 le32_to_cpu(cmd->sleep_interval[2]),
1555 le32_to_cpu(cmd->sleep_interval[3]),
1556 le32_to_cpu(cmd->sleep_interval[4]));
1557
1558 return rc;
1559 }
1560
1561 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1562 {
1563 u32 uninitialized_var(final_mode);
1564 int rc;
1565 struct iwl4965_powertable_cmd cmd;
1566
1567 /* If on battery, set to 3,
1568 * if plugged into AC power, set to CAM ("continuously aware mode"),
1569 * else user level */
1570 switch (mode) {
1571 case IWL_POWER_BATTERY:
1572 final_mode = IWL_POWER_INDEX_3;
1573 break;
1574 case IWL_POWER_AC:
1575 final_mode = IWL_POWER_MODE_CAM;
1576 break;
1577 default:
1578 final_mode = mode;
1579 break;
1580 }
1581
1582 cmd.keep_alive_beacons = 0;
1583
1584 iwl4965_update_power_cmd(priv, &cmd, final_mode);
1585
1586 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1587
1588 if (final_mode == IWL_POWER_MODE_CAM)
1589 clear_bit(STATUS_POWER_PMI, &priv->status);
1590 else
1591 set_bit(STATUS_POWER_PMI, &priv->status);
1592
1593 return rc;
1594 }
1595
1596 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1597 {
1598 /* Filter incoming packets to determine if they are targeted toward
1599 * this network, discarding packets coming from ourselves */
1600 switch (priv->iw_mode) {
1601 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
1602 /* packets from our adapter are dropped (echo) */
1603 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1604 return 0;
1605 /* {broad,multi}cast packets to our IBSS go through */
1606 if (is_multicast_ether_addr(header->addr1))
1607 return !compare_ether_addr(header->addr3, priv->bssid);
1608 /* packets to our adapter go through */
1609 return !compare_ether_addr(header->addr1, priv->mac_addr);
1610 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1611 /* packets from our adapter are dropped (echo) */
1612 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1613 return 0;
1614 /* {broad,multi}cast packets to our BSS go through */
1615 if (is_multicast_ether_addr(header->addr1))
1616 return !compare_ether_addr(header->addr2, priv->bssid);
1617 /* packets to our adapter go through */
1618 return !compare_ether_addr(header->addr1, priv->mac_addr);
1619 default:
1620 break;
1621 }
1622
1623 return 1;
1624 }
1625
1626 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1627
1628 static const char *iwl4965_get_tx_fail_reason(u32 status)
1629 {
1630 switch (status & TX_STATUS_MSK) {
1631 case TX_STATUS_SUCCESS:
1632 return "SUCCESS";
1633 TX_STATUS_ENTRY(SHORT_LIMIT);
1634 TX_STATUS_ENTRY(LONG_LIMIT);
1635 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1636 TX_STATUS_ENTRY(MGMNT_ABORT);
1637 TX_STATUS_ENTRY(NEXT_FRAG);
1638 TX_STATUS_ENTRY(LIFE_EXPIRE);
1639 TX_STATUS_ENTRY(DEST_PS);
1640 TX_STATUS_ENTRY(ABORTED);
1641 TX_STATUS_ENTRY(BT_RETRY);
1642 TX_STATUS_ENTRY(STA_INVALID);
1643 TX_STATUS_ENTRY(FRAG_DROPPED);
1644 TX_STATUS_ENTRY(TID_DISABLE);
1645 TX_STATUS_ENTRY(FRAME_FLUSHED);
1646 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1647 TX_STATUS_ENTRY(TX_LOCKED);
1648 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1649 }
1650
1651 return "UNKNOWN";
1652 }
1653
1654 /**
1655 * iwl4965_scan_cancel - Cancel any currently executing HW scan
1656 *
1657 * NOTE: priv->mutex is not required before calling this function
1658 */
1659 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1660 {
1661 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1662 clear_bit(STATUS_SCANNING, &priv->status);
1663 return 0;
1664 }
1665
1666 if (test_bit(STATUS_SCANNING, &priv->status)) {
1667 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1668 IWL_DEBUG_SCAN("Queuing scan abort.\n");
1669 set_bit(STATUS_SCAN_ABORTING, &priv->status);
1670 queue_work(priv->workqueue, &priv->abort_scan);
1671
1672 } else
1673 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1674
1675 return test_bit(STATUS_SCANNING, &priv->status);
1676 }
1677
1678 return 0;
1679 }
1680
1681 /**
1682 * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1683 * @ms: amount of time to wait (in milliseconds) for scan to abort
1684 *
1685 * NOTE: priv->mutex must be held before calling this function
1686 */
1687 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1688 {
1689 unsigned long now = jiffies;
1690 int ret;
1691
1692 ret = iwl4965_scan_cancel(priv);
1693 if (ret && ms) {
1694 mutex_unlock(&priv->mutex);
1695 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1696 test_bit(STATUS_SCANNING, &priv->status))
1697 msleep(1);
1698 mutex_lock(&priv->mutex);
1699
1700 return test_bit(STATUS_SCANNING, &priv->status);
1701 }
1702
1703 return ret;
1704 }
1705
1706 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1707 {
1708 /* Reset ieee stats */
1709
1710 /* We don't reset the net_device_stats (ieee->stats) on
1711 * re-association */
1712
1713 priv->last_seq_num = -1;
1714 priv->last_frag_num = -1;
1715 priv->last_packet_time = 0;
1716
1717 iwl4965_scan_cancel(priv);
1718 }
1719
1720 #define MAX_UCODE_BEACON_INTERVAL 4096
1721 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
1722
1723 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1724 {
1725 u16 new_val = 0;
1726 u16 beacon_factor = 0;
1727
1728 beacon_factor =
1729 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1730 / MAX_UCODE_BEACON_INTERVAL;
1731 new_val = beacon_val / beacon_factor;
1732
1733 return cpu_to_le16(new_val);
1734 }
1735
1736 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1737 {
1738 u64 interval_tm_unit;
1739 u64 tsf, result;
1740 unsigned long flags;
1741 struct ieee80211_conf *conf = NULL;
1742 u16 beacon_int = 0;
1743
1744 conf = ieee80211_get_hw_conf(priv->hw);
1745
1746 spin_lock_irqsave(&priv->lock, flags);
1747 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1748 priv->rxon_timing.timestamp.dw[0] =
1749 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1750
1751 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1752
1753 tsf = priv->timestamp;
1754
1755 beacon_int = priv->beacon_int;
1756 spin_unlock_irqrestore(&priv->lock, flags);
1757
1758 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1759 if (beacon_int == 0) {
1760 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1761 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1762 } else {
1763 priv->rxon_timing.beacon_interval =
1764 cpu_to_le16(beacon_int);
1765 priv->rxon_timing.beacon_interval =
1766 iwl4965_adjust_beacon_interval(
1767 le16_to_cpu(priv->rxon_timing.beacon_interval));
1768 }
1769
1770 priv->rxon_timing.atim_window = 0;
1771 } else {
1772 priv->rxon_timing.beacon_interval =
1773 iwl4965_adjust_beacon_interval(conf->beacon_int);
1774 /* TODO: we need to get atim_window from upper stack
1775 * for now we set to 0 */
1776 priv->rxon_timing.atim_window = 0;
1777 }
1778
1779 interval_tm_unit =
1780 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1781 result = do_div(tsf, interval_tm_unit);
1782 priv->rxon_timing.beacon_init_val =
1783 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1784
1785 IWL_DEBUG_ASSOC
1786 ("beacon interval %d beacon timer %d beacon tim %d\n",
1787 le16_to_cpu(priv->rxon_timing.beacon_interval),
1788 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1789 le16_to_cpu(priv->rxon_timing.atim_window));
1790 }
1791
1792 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1793 {
1794 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1795 IWL_ERROR("APs don't scan.\n");
1796 return 0;
1797 }
1798
1799 if (!iwl_is_ready_rf(priv)) {
1800 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1801 return -EIO;
1802 }
1803
1804 if (test_bit(STATUS_SCANNING, &priv->status)) {
1805 IWL_DEBUG_SCAN("Scan already in progress.\n");
1806 return -EAGAIN;
1807 }
1808
1809 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1810 IWL_DEBUG_SCAN("Scan request while abort pending. "
1811 "Queuing.\n");
1812 return -EAGAIN;
1813 }
1814
1815 IWL_DEBUG_INFO("Starting scan...\n");
1816 priv->scan_bands = 2;
1817 set_bit(STATUS_SCANNING, &priv->status);
1818 priv->scan_start = jiffies;
1819 priv->scan_pass_start = priv->scan_start;
1820
1821 queue_work(priv->workqueue, &priv->request_scan);
1822
1823 return 0;
1824 }
1825
1826
1827 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1828 enum ieee80211_band band)
1829 {
1830 if (band == IEEE80211_BAND_5GHZ) {
1831 priv->staging_rxon.flags &=
1832 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1833 | RXON_FLG_CCK_MSK);
1834 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1835 } else {
1836 /* Copied from iwl4965_post_associate() */
1837 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1838 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1839 else
1840 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1841
1842 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1843 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1844
1845 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1846 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1847 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1848 }
1849 }
1850
1851 /*
1852 * initialize rxon structure with default values from eeprom
1853 */
1854 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1855 {
1856 const struct iwl_channel_info *ch_info;
1857
1858 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1859
1860 switch (priv->iw_mode) {
1861 case IEEE80211_IF_TYPE_AP:
1862 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1863 break;
1864
1865 case IEEE80211_IF_TYPE_STA:
1866 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1867 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1868 break;
1869
1870 case IEEE80211_IF_TYPE_IBSS:
1871 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1872 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1873 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1874 RXON_FILTER_ACCEPT_GRP_MSK;
1875 break;
1876
1877 case IEEE80211_IF_TYPE_MNTR:
1878 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1879 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1880 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1881 break;
1882 default:
1883 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1884 break;
1885 }
1886
1887 #if 0
1888 /* TODO: Figure out when short_preamble would be set and cache from
1889 * that */
1890 if (!hw_to_local(priv->hw)->short_preamble)
1891 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1892 else
1893 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1894 #endif
1895
1896 ch_info = iwl_get_channel_info(priv, priv->band,
1897 le16_to_cpu(priv->staging_rxon.channel));
1898
1899 if (!ch_info)
1900 ch_info = &priv->channel_info[0];
1901
1902 /*
1903 * in some case A channels are all non IBSS
1904 * in this case force B/G channel
1905 */
1906 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1907 !(is_channel_ibss(ch_info)))
1908 ch_info = &priv->channel_info[0];
1909
1910 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1911 priv->band = ch_info->band;
1912
1913 iwl4965_set_flags_for_phymode(priv, priv->band);
1914
1915 priv->staging_rxon.ofdm_basic_rates =
1916 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1917 priv->staging_rxon.cck_basic_rates =
1918 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1919
1920 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1921 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1922 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1923 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1924 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1925 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1926 iwl4965_set_rxon_chain(priv);
1927 }
1928
1929 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1930 {
1931 if (mode == IEEE80211_IF_TYPE_IBSS) {
1932 const struct iwl_channel_info *ch_info;
1933
1934 ch_info = iwl_get_channel_info(priv,
1935 priv->band,
1936 le16_to_cpu(priv->staging_rxon.channel));
1937
1938 if (!ch_info || !is_channel_ibss(ch_info)) {
1939 IWL_ERROR("channel %d not IBSS channel\n",
1940 le16_to_cpu(priv->staging_rxon.channel));
1941 return -EINVAL;
1942 }
1943 }
1944
1945 priv->iw_mode = mode;
1946
1947 iwl4965_connection_init_rx_config(priv);
1948 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1949
1950 iwlcore_clear_stations_table(priv);
1951
1952 /* dont commit rxon if rf-kill is on*/
1953 if (!iwl_is_ready_rf(priv))
1954 return -EAGAIN;
1955
1956 cancel_delayed_work(&priv->scan_check);
1957 if (iwl4965_scan_cancel_timeout(priv, 100)) {
1958 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1959 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1960 return -EAGAIN;
1961 }
1962
1963 iwl4965_commit_rxon(priv);
1964
1965 return 0;
1966 }
1967
1968 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1969 struct ieee80211_tx_control *ctl,
1970 struct iwl_cmd *cmd,
1971 struct sk_buff *skb_frag,
1972 int sta_id)
1973 {
1974 struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1975 struct iwl_wep_key *wepkey;
1976 int keyidx = 0;
1977
1978 BUG_ON(ctl->key_idx > 3);
1979
1980 switch (keyinfo->alg) {
1981 case ALG_CCMP:
1982 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1983 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1984 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1985 cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1986 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1987 break;
1988
1989 case ALG_TKIP:
1990 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1991 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1992 IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1993 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1994 break;
1995
1996 case ALG_WEP:
1997 wepkey = &priv->wep_keys[ctl->key_idx];
1998 cmd->cmd.tx.sec_ctl = 0;
1999 if (priv->default_wep_key) {
2000 /* the WEP key was sent as static */
2001 keyidx = ctl->key_idx;
2002 memcpy(&cmd->cmd.tx.key[3], wepkey->key,
2003 wepkey->key_size);
2004 if (wepkey->key_size == WEP_KEY_LEN_128)
2005 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2006 } else {
2007 /* the WEP key was sent as dynamic */
2008 keyidx = keyinfo->keyidx;
2009 memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
2010 keyinfo->keylen);
2011 if (keyinfo->keylen == WEP_KEY_LEN_128)
2012 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2013 }
2014
2015 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
2016 (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
2017
2018 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2019 "with key %d\n", keyidx);
2020 break;
2021
2022 default:
2023 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2024 break;
2025 }
2026 }
2027
2028 /*
2029 * handle build REPLY_TX command notification.
2030 */
2031 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
2032 struct iwl_cmd *cmd,
2033 struct ieee80211_tx_control *ctrl,
2034 struct ieee80211_hdr *hdr,
2035 int is_unicast, u8 std_id)
2036 {
2037 __le16 *qc;
2038 u16 fc = le16_to_cpu(hdr->frame_control);
2039 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2040
2041 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2042 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2043 tx_flags |= TX_CMD_FLG_ACK_MSK;
2044 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2045 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2046 if (ieee80211_is_probe_response(fc) &&
2047 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2048 tx_flags |= TX_CMD_FLG_TSF_MSK;
2049 } else {
2050 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2051 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2052 }
2053
2054 if (ieee80211_is_back_request(fc))
2055 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2056
2057
2058 cmd->cmd.tx.sta_id = std_id;
2059 if (ieee80211_get_morefrag(hdr))
2060 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2061
2062 qc = ieee80211_get_qos_ctrl(hdr);
2063 if (qc) {
2064 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2065 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2066 } else
2067 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2068
2069 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2070 tx_flags |= TX_CMD_FLG_RTS_MSK;
2071 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2072 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2073 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2074 tx_flags |= TX_CMD_FLG_CTS_MSK;
2075 }
2076
2077 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2078 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2079
2080 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2081 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2082 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2083 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2084 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2085 else
2086 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2087 } else {
2088 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2089 }
2090
2091 cmd->cmd.tx.driver_txop = 0;
2092 cmd->cmd.tx.tx_flags = tx_flags;
2093 cmd->cmd.tx.next_frame_len = 0;
2094 }
2095 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2096 {
2097 /* 0 - mgmt, 1 - cnt, 2 - data */
2098 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2099 priv->tx_stats[idx].cnt++;
2100 priv->tx_stats[idx].bytes += len;
2101 }
2102 /**
2103 * iwl4965_get_sta_id - Find station's index within station table
2104 *
2105 * If new IBSS station, create new entry in station table
2106 */
2107 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2108 struct ieee80211_hdr *hdr)
2109 {
2110 int sta_id;
2111 u16 fc = le16_to_cpu(hdr->frame_control);
2112 DECLARE_MAC_BUF(mac);
2113
2114 /* If this frame is broadcast or management, use broadcast station id */
2115 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2116 is_multicast_ether_addr(hdr->addr1))
2117 return priv->hw_params.bcast_sta_id;
2118
2119 switch (priv->iw_mode) {
2120
2121 /* If we are a client station in a BSS network, use the special
2122 * AP station entry (that's the only station we communicate with) */
2123 case IEEE80211_IF_TYPE_STA:
2124 return IWL_AP_ID;
2125
2126 /* If we are an AP, then find the station, or use BCAST */
2127 case IEEE80211_IF_TYPE_AP:
2128 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2129 if (sta_id != IWL_INVALID_STATION)
2130 return sta_id;
2131 return priv->hw_params.bcast_sta_id;
2132
2133 /* If this frame is going out to an IBSS network, find the station,
2134 * or create a new station table entry */
2135 case IEEE80211_IF_TYPE_IBSS:
2136 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2137 if (sta_id != IWL_INVALID_STATION)
2138 return sta_id;
2139
2140 /* Create new station table entry */
2141 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2142 0, CMD_ASYNC, NULL);
2143
2144 if (sta_id != IWL_INVALID_STATION)
2145 return sta_id;
2146
2147 IWL_DEBUG_DROP("Station %s not in station map. "
2148 "Defaulting to broadcast...\n",
2149 print_mac(mac, hdr->addr1));
2150 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2151 return priv->hw_params.bcast_sta_id;
2152
2153 default:
2154 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2155 return priv->hw_params.bcast_sta_id;
2156 }
2157 }
2158
2159 /*
2160 * start REPLY_TX command process
2161 */
2162 static int iwl4965_tx_skb(struct iwl_priv *priv,
2163 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2164 {
2165 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2166 struct iwl4965_tfd_frame *tfd;
2167 u32 *control_flags;
2168 int txq_id = ctl->queue;
2169 struct iwl4965_tx_queue *txq = NULL;
2170 struct iwl4965_queue *q = NULL;
2171 dma_addr_t phys_addr;
2172 dma_addr_t txcmd_phys;
2173 dma_addr_t scratch_phys;
2174 struct iwl_cmd *out_cmd = NULL;
2175 u16 len, idx, len_org;
2176 u8 id, hdr_len, unicast;
2177 u8 sta_id;
2178 u16 seq_number = 0;
2179 u16 fc;
2180 __le16 *qc;
2181 u8 wait_write_ptr = 0;
2182 unsigned long flags;
2183 int rc;
2184
2185 spin_lock_irqsave(&priv->lock, flags);
2186 if (iwl_is_rfkill(priv)) {
2187 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2188 goto drop_unlock;
2189 }
2190
2191 if (!priv->vif) {
2192 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2193 goto drop_unlock;
2194 }
2195
2196 if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2197 IWL_ERROR("ERROR: No TX rate available.\n");
2198 goto drop_unlock;
2199 }
2200
2201 unicast = !is_multicast_ether_addr(hdr->addr1);
2202 id = 0;
2203
2204 fc = le16_to_cpu(hdr->frame_control);
2205
2206 #ifdef CONFIG_IWLWIFI_DEBUG
2207 if (ieee80211_is_auth(fc))
2208 IWL_DEBUG_TX("Sending AUTH frame\n");
2209 else if (ieee80211_is_assoc_request(fc))
2210 IWL_DEBUG_TX("Sending ASSOC frame\n");
2211 else if (ieee80211_is_reassoc_request(fc))
2212 IWL_DEBUG_TX("Sending REASSOC frame\n");
2213 #endif
2214
2215 /* drop all data frame if we are not associated */
2216 if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2217 (!iwl_is_associated(priv) ||
2218 ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2219 !priv->assoc_station_added)) {
2220 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2221 goto drop_unlock;
2222 }
2223
2224 spin_unlock_irqrestore(&priv->lock, flags);
2225
2226 hdr_len = ieee80211_get_hdrlen(fc);
2227
2228 /* Find (or create) index into station table for destination station */
2229 sta_id = iwl4965_get_sta_id(priv, hdr);
2230 if (sta_id == IWL_INVALID_STATION) {
2231 DECLARE_MAC_BUF(mac);
2232
2233 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2234 print_mac(mac, hdr->addr1));
2235 goto drop;
2236 }
2237
2238 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2239
2240 qc = ieee80211_get_qos_ctrl(hdr);
2241 if (qc) {
2242 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2243 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2244 IEEE80211_SCTL_SEQ;
2245 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2246 (hdr->seq_ctrl &
2247 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2248 seq_number += 0x10;
2249 #ifdef CONFIG_IWL4965_HT
2250 /* aggregation is on for this <sta,tid> */
2251 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2252 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2253 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2254 #endif /* CONFIG_IWL4965_HT */
2255 }
2256
2257 /* Descriptor for chosen Tx queue */
2258 txq = &priv->txq[txq_id];
2259 q = &txq->q;
2260
2261 spin_lock_irqsave(&priv->lock, flags);
2262
2263 /* Set up first empty TFD within this queue's circular TFD buffer */
2264 tfd = &txq->bd[q->write_ptr];
2265 memset(tfd, 0, sizeof(*tfd));
2266 control_flags = (u32 *) tfd;
2267 idx = get_cmd_index(q, q->write_ptr, 0);
2268
2269 /* Set up driver data for this TFD */
2270 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2271 txq->txb[q->write_ptr].skb[0] = skb;
2272 memcpy(&(txq->txb[q->write_ptr].status.control),
2273 ctl, sizeof(struct ieee80211_tx_control));
2274
2275 /* Set up first empty entry in queue's array of Tx/cmd buffers */
2276 out_cmd = &txq->cmd[idx];
2277 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2278 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2279
2280 /*
2281 * Set up the Tx-command (not MAC!) header.
2282 * Store the chosen Tx queue and TFD index within the sequence field;
2283 * after Tx, uCode's Tx response will return this value so driver can
2284 * locate the frame within the tx queue and do post-tx processing.
2285 */
2286 out_cmd->hdr.cmd = REPLY_TX;
2287 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2288 INDEX_TO_SEQ(q->write_ptr)));
2289
2290 /* Copy MAC header from skb into command buffer */
2291 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2292
2293 /*
2294 * Use the first empty entry in this queue's command buffer array
2295 * to contain the Tx command and MAC header concatenated together
2296 * (payload data will be in another buffer).
2297 * Size of this varies, due to varying MAC header length.
2298 * If end is not dword aligned, we'll have 2 extra bytes at the end
2299 * of the MAC header (device reads on dword boundaries).
2300 * We'll tell device about this padding later.
2301 */
2302 len = priv->hw_params.tx_cmd_len +
2303 sizeof(struct iwl_cmd_header) + hdr_len;
2304
2305 len_org = len;
2306 len = (len + 3) & ~3;
2307
2308 if (len_org != len)
2309 len_org = 1;
2310 else
2311 len_org = 0;
2312
2313 /* Physical address of this Tx command's header (not MAC header!),
2314 * within command buffer array. */
2315 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2316 offsetof(struct iwl_cmd, hdr);
2317
2318 /* Add buffer containing Tx command and MAC(!) header to TFD's
2319 * first entry */
2320 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2321
2322 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2323 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2324
2325 /* Set up TFD's 2nd entry to point directly to remainder of skb,
2326 * if any (802.11 null frames have no payload). */
2327 len = skb->len - hdr_len;
2328 if (len) {
2329 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2330 len, PCI_DMA_TODEVICE);
2331 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2332 }
2333
2334 /* Tell 4965 about any 2-byte padding after MAC header */
2335 if (len_org)
2336 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2337
2338 /* Total # bytes to be transmitted */
2339 len = (u16)skb->len;
2340 out_cmd->cmd.tx.len = cpu_to_le16(len);
2341
2342 /* TODO need this for burst mode later on */
2343 iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2344
2345 /* set is_hcca to 0; it probably will never be implemented */
2346 iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2347
2348 iwl_update_tx_stats(priv, fc, len);
2349
2350 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2351 offsetof(struct iwl4965_tx_cmd, scratch);
2352 out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2353 out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2354
2355 if (!ieee80211_get_morefrag(hdr)) {
2356 txq->need_update = 1;
2357 if (qc) {
2358 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2359 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2360 }
2361 } else {
2362 wait_write_ptr = 1;
2363 txq->need_update = 0;
2364 }
2365
2366 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2367 sizeof(out_cmd->cmd.tx));
2368
2369 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2370 ieee80211_get_hdrlen(fc));
2371
2372 /* Set up entry for this TFD in Tx byte-count array */
2373 priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2374
2375 /* Tell device the write index *just past* this latest filled TFD */
2376 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2377 rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2378 spin_unlock_irqrestore(&priv->lock, flags);
2379
2380 if (rc)
2381 return rc;
2382
2383 if ((iwl4965_queue_space(q) < q->high_mark)
2384 && priv->mac80211_registered) {
2385 if (wait_write_ptr) {
2386 spin_lock_irqsave(&priv->lock, flags);
2387 txq->need_update = 1;
2388 iwl4965_tx_queue_update_write_ptr(priv, txq);
2389 spin_unlock_irqrestore(&priv->lock, flags);
2390 }
2391
2392 ieee80211_stop_queue(priv->hw, ctl->queue);
2393 }
2394
2395 return 0;
2396
2397 drop_unlock:
2398 spin_unlock_irqrestore(&priv->lock, flags);
2399 drop:
2400 return -1;
2401 }
2402
2403 static void iwl4965_set_rate(struct iwl_priv *priv)
2404 {
2405 const struct ieee80211_supported_band *hw = NULL;
2406 struct ieee80211_rate *rate;
2407 int i;
2408
2409 hw = iwl4965_get_hw_mode(priv, priv->band);
2410 if (!hw) {
2411 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2412 return;
2413 }
2414
2415 priv->active_rate = 0;
2416 priv->active_rate_basic = 0;
2417
2418 for (i = 0; i < hw->n_bitrates; i++) {
2419 rate = &(hw->bitrates[i]);
2420 if (rate->hw_value < IWL_RATE_COUNT)
2421 priv->active_rate |= (1 << rate->hw_value);
2422 }
2423
2424 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2425 priv->active_rate, priv->active_rate_basic);
2426
2427 /*
2428 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2429 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2430 * OFDM
2431 */
2432 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2433 priv->staging_rxon.cck_basic_rates =
2434 ((priv->active_rate_basic &
2435 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2436 else
2437 priv->staging_rxon.cck_basic_rates =
2438 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2439
2440 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2441 priv->staging_rxon.ofdm_basic_rates =
2442 ((priv->active_rate_basic &
2443 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2444 IWL_FIRST_OFDM_RATE) & 0xFF;
2445 else
2446 priv->staging_rxon.ofdm_basic_rates =
2447 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2448 }
2449
2450 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2451 {
2452 unsigned long flags;
2453
2454 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2455 return;
2456
2457 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2458 disable_radio ? "OFF" : "ON");
2459
2460 if (disable_radio) {
2461 iwl4965_scan_cancel(priv);
2462 /* FIXME: This is a workaround for AP */
2463 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2464 spin_lock_irqsave(&priv->lock, flags);
2465 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2466 CSR_UCODE_SW_BIT_RFKILL);
2467 spin_unlock_irqrestore(&priv->lock, flags);
2468 /* call the host command only if no hw rf-kill set */
2469 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2470 iwl4965_send_card_state(priv,
2471 CARD_STATE_CMD_DISABLE,
2472 0);
2473 set_bit(STATUS_RF_KILL_SW, &priv->status);
2474
2475 /* make sure mac80211 stop sending Tx frame */
2476 if (priv->mac80211_registered)
2477 ieee80211_stop_queues(priv->hw);
2478 }
2479 return;
2480 }
2481
2482 spin_lock_irqsave(&priv->lock, flags);
2483 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2484
2485 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2486 spin_unlock_irqrestore(&priv->lock, flags);
2487
2488 /* wake up ucode */
2489 msleep(10);
2490
2491 spin_lock_irqsave(&priv->lock, flags);
2492 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2493 if (!iwl_grab_nic_access(priv))
2494 iwl_release_nic_access(priv);
2495 spin_unlock_irqrestore(&priv->lock, flags);
2496
2497 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2498 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2499 "disabled by HW switch\n");
2500 return;
2501 }
2502
2503 queue_work(priv->workqueue, &priv->restart);
2504 return;
2505 }
2506
2507 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2508 u32 decrypt_res, struct ieee80211_rx_status *stats)
2509 {
2510 u16 fc =
2511 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2512
2513 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2514 return;
2515
2516 if (!(fc & IEEE80211_FCTL_PROTECTED))
2517 return;
2518
2519 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2520 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2521 case RX_RES_STATUS_SEC_TYPE_TKIP:
2522 /* The uCode has got a bad phase 1 Key, pushes the packet.
2523 * Decryption will be done in SW. */
2524 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2525 RX_RES_STATUS_BAD_KEY_TTAK)
2526 break;
2527
2528 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2529 RX_RES_STATUS_BAD_ICV_MIC)
2530 stats->flag |= RX_FLAG_MMIC_ERROR;
2531 case RX_RES_STATUS_SEC_TYPE_WEP:
2532 case RX_RES_STATUS_SEC_TYPE_CCMP:
2533 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2534 RX_RES_STATUS_DECRYPT_OK) {
2535 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2536 stats->flag |= RX_FLAG_DECRYPTED;
2537 }
2538 break;
2539
2540 default:
2541 break;
2542 }
2543 }
2544
2545
2546 #define IWL_PACKET_RETRY_TIME HZ
2547
2548 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2549 {
2550 u16 sc = le16_to_cpu(header->seq_ctrl);
2551 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2552 u16 frag = sc & IEEE80211_SCTL_FRAG;
2553 u16 *last_seq, *last_frag;
2554 unsigned long *last_time;
2555
2556 switch (priv->iw_mode) {
2557 case IEEE80211_IF_TYPE_IBSS:{
2558 struct list_head *p;
2559 struct iwl4965_ibss_seq *entry = NULL;
2560 u8 *mac = header->addr2;
2561 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2562
2563 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2564 entry = list_entry(p, struct iwl4965_ibss_seq, list);
2565 if (!compare_ether_addr(entry->mac, mac))
2566 break;
2567 }
2568 if (p == &priv->ibss_mac_hash[index]) {
2569 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2570 if (!entry) {
2571 IWL_ERROR("Cannot malloc new mac entry\n");
2572 return 0;
2573 }
2574 memcpy(entry->mac, mac, ETH_ALEN);
2575 entry->seq_num = seq;
2576 entry->frag_num = frag;
2577 entry->packet_time = jiffies;
2578 list_add(&entry->list, &priv->ibss_mac_hash[index]);
2579 return 0;
2580 }
2581 last_seq = &entry->seq_num;
2582 last_frag = &entry->frag_num;
2583 last_time = &entry->packet_time;
2584 break;
2585 }
2586 case IEEE80211_IF_TYPE_STA:
2587 last_seq = &priv->last_seq_num;
2588 last_frag = &priv->last_frag_num;
2589 last_time = &priv->last_packet_time;
2590 break;
2591 default:
2592 return 0;
2593 }
2594 if ((*last_seq == seq) &&
2595 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2596 if (*last_frag == frag)
2597 goto drop;
2598 if (*last_frag + 1 != frag)
2599 /* out-of-order fragment */
2600 goto drop;
2601 } else
2602 *last_seq = seq;
2603
2604 *last_frag = frag;
2605 *last_time = jiffies;
2606 return 0;
2607
2608 drop:
2609 return 1;
2610 }
2611
2612 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2613
2614 #include "iwl-spectrum.h"
2615
2616 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
2617 #define BEACON_TIME_MASK_HIGH 0xFF000000
2618 #define TIME_UNIT 1024
2619
2620 /*
2621 * extended beacon time format
2622 * time in usec will be changed into a 32-bit value in 8:24 format
2623 * the high 1 byte is the beacon counts
2624 * the lower 3 bytes is the time in usec within one beacon interval
2625 */
2626
2627 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2628 {
2629 u32 quot;
2630 u32 rem;
2631 u32 interval = beacon_interval * 1024;
2632
2633 if (!interval || !usec)
2634 return 0;
2635
2636 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2637 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2638
2639 return (quot << 24) + rem;
2640 }
2641
2642 /* base is usually what we get from ucode with each received frame,
2643 * the same as HW timer counter counting down
2644 */
2645
2646 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2647 {
2648 u32 base_low = base & BEACON_TIME_MASK_LOW;
2649 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2650 u32 interval = beacon_interval * TIME_UNIT;
2651 u32 res = (base & BEACON_TIME_MASK_HIGH) +
2652 (addon & BEACON_TIME_MASK_HIGH);
2653
2654 if (base_low > addon_low)
2655 res += base_low - addon_low;
2656 else if (base_low < addon_low) {
2657 res += interval + base_low - addon_low;
2658 res += (1 << 24);
2659 } else
2660 res += (1 << 24);
2661
2662 return cpu_to_le32(res);
2663 }
2664
2665 static int iwl4965_get_measurement(struct iwl_priv *priv,
2666 struct ieee80211_measurement_params *params,
2667 u8 type)
2668 {
2669 struct iwl4965_spectrum_cmd spectrum;
2670 struct iwl4965_rx_packet *res;
2671 struct iwl_host_cmd cmd = {
2672 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2673 .data = (void *)&spectrum,
2674 .meta.flags = CMD_WANT_SKB,
2675 };
2676 u32 add_time = le64_to_cpu(params->start_time);
2677 int rc;
2678 int spectrum_resp_status;
2679 int duration = le16_to_cpu(params->duration);
2680
2681 if (iwl_is_associated(priv))
2682 add_time =
2683 iwl4965_usecs_to_beacons(
2684 le64_to_cpu(params->start_time) - priv->last_tsf,
2685 le16_to_cpu(priv->rxon_timing.beacon_interval));
2686
2687 memset(&spectrum, 0, sizeof(spectrum));
2688
2689 spectrum.channel_count = cpu_to_le16(1);
2690 spectrum.flags =
2691 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2692 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2693 cmd.len = sizeof(spectrum);
2694 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2695
2696 if (iwl_is_associated(priv))
2697 spectrum.start_time =
2698 iwl4965_add_beacon_time(priv->last_beacon_time,
2699 add_time,
2700 le16_to_cpu(priv->rxon_timing.beacon_interval));
2701 else
2702 spectrum.start_time = 0;
2703
2704 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2705 spectrum.channels[0].channel = params->channel;
2706 spectrum.channels[0].type = type;
2707 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2708 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2709 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2710
2711 rc = iwl_send_cmd_sync(priv, &cmd);
2712 if (rc)
2713 return rc;
2714
2715 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2716 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2717 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2718 rc = -EIO;
2719 }
2720
2721 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2722 switch (spectrum_resp_status) {
2723 case 0: /* Command will be handled */
2724 if (res->u.spectrum.id != 0xff) {
2725 IWL_DEBUG_INFO
2726 ("Replaced existing measurement: %d\n",
2727 res->u.spectrum.id);
2728 priv->measurement_status &= ~MEASUREMENT_READY;
2729 }
2730 priv->measurement_status |= MEASUREMENT_ACTIVE;
2731 rc = 0;
2732 break;
2733
2734 case 1: /* Command will not be handled */
2735 rc = -EAGAIN;
2736 break;
2737 }
2738
2739 dev_kfree_skb_any(cmd.meta.u.skb);
2740
2741 return rc;
2742 }
2743 #endif
2744
2745 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2746 struct iwl4965_tx_info *tx_sta)
2747 {
2748
2749 tx_sta->status.ack_signal = 0;
2750 tx_sta->status.excessive_retries = 0;
2751 tx_sta->status.queue_length = 0;
2752 tx_sta->status.queue_number = 0;
2753
2754 if (in_interrupt())
2755 ieee80211_tx_status_irqsafe(priv->hw,
2756 tx_sta->skb[0], &(tx_sta->status));
2757 else
2758 ieee80211_tx_status(priv->hw,
2759 tx_sta->skb[0], &(tx_sta->status));
2760
2761 tx_sta->skb[0] = NULL;
2762 }
2763
2764 /**
2765 * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2766 *
2767 * When FW advances 'R' index, all entries between old and new 'R' index
2768 * need to be reclaimed. As result, some free space forms. If there is
2769 * enough free space (> low mark), wake the stack that feeds us.
2770 */
2771 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2772 {
2773 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2774 struct iwl4965_queue *q = &txq->q;
2775 int nfreed = 0;
2776
2777 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2778 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2779 "is out of range [0-%d] %d %d.\n", txq_id,
2780 index, q->n_bd, q->write_ptr, q->read_ptr);
2781 return 0;
2782 }
2783
2784 for (index = iwl_queue_inc_wrap(index, q->n_bd);
2785 q->read_ptr != index;
2786 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2787 if (txq_id != IWL_CMD_QUEUE_NUM) {
2788 iwl4965_txstatus_to_ieee(priv,
2789 &(txq->txb[txq->q.read_ptr]));
2790 iwl4965_hw_txq_free_tfd(priv, txq);
2791 } else if (nfreed > 1) {
2792 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2793 q->write_ptr, q->read_ptr);
2794 queue_work(priv->workqueue, &priv->restart);
2795 }
2796 nfreed++;
2797 }
2798
2799 /* if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2800 (txq_id != IWL_CMD_QUEUE_NUM) &&
2801 priv->mac80211_registered)
2802 ieee80211_wake_queue(priv->hw, txq_id); */
2803
2804
2805 return nfreed;
2806 }
2807
2808 static int iwl4965_is_tx_success(u32 status)
2809 {
2810 status &= TX_STATUS_MSK;
2811 return (status == TX_STATUS_SUCCESS)
2812 || (status == TX_STATUS_DIRECT_DONE);
2813 }
2814
2815 /******************************************************************************
2816 *
2817 * Generic RX handler implementations
2818 *
2819 ******************************************************************************/
2820 #ifdef CONFIG_IWL4965_HT
2821
2822 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2823 struct ieee80211_hdr *hdr)
2824 {
2825 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2826 return IWL_AP_ID;
2827 else {
2828 u8 *da = ieee80211_get_DA(hdr);
2829 return iwl4965_hw_find_station(priv, da);
2830 }
2831 }
2832
2833 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2834 struct iwl_priv *priv, int txq_id, int idx)
2835 {
2836 if (priv->txq[txq_id].txb[idx].skb[0])
2837 return (struct ieee80211_hdr *)priv->txq[txq_id].
2838 txb[idx].skb[0]->data;
2839 return NULL;
2840 }
2841
2842 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2843 {
2844 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2845 tx_resp->frame_count);
2846 return le32_to_cpu(*scd_ssn) & MAX_SN;
2847
2848 }
2849
2850 /**
2851 * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2852 */
2853 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2854 struct iwl4965_ht_agg *agg,
2855 struct iwl4965_tx_resp_agg *tx_resp,
2856 u16 start_idx)
2857 {
2858 u16 status;
2859 struct agg_tx_status *frame_status = &tx_resp->status;
2860 struct ieee80211_tx_status *tx_status = NULL;
2861 struct ieee80211_hdr *hdr = NULL;
2862 int i, sh;
2863 int txq_id, idx;
2864 u16 seq;
2865
2866 if (agg->wait_for_ba)
2867 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2868
2869 agg->frame_count = tx_resp->frame_count;
2870 agg->start_idx = start_idx;
2871 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2872 agg->bitmap = 0;
2873
2874 /* # frames attempted by Tx command */
2875 if (agg->frame_count == 1) {
2876 /* Only one frame was attempted; no block-ack will arrive */
2877 status = le16_to_cpu(frame_status[0].status);
2878 seq = le16_to_cpu(frame_status[0].sequence);
2879 idx = SEQ_TO_INDEX(seq);
2880 txq_id = SEQ_TO_QUEUE(seq);
2881
2882 /* FIXME: code repetition */
2883 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2884 agg->frame_count, agg->start_idx, idx);
2885
2886 tx_status = &(priv->txq[txq_id].txb[idx].status);
2887 tx_status->retry_count = tx_resp->failure_frame;
2888 tx_status->queue_number = status & 0xff;
2889 tx_status->queue_length = tx_resp->failure_rts;
2890 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2891 tx_status->flags = iwl4965_is_tx_success(status)?
2892 IEEE80211_TX_STATUS_ACK : 0;
2893 iwl4965_hwrate_to_tx_control(priv,
2894 le32_to_cpu(tx_resp->rate_n_flags),
2895 &tx_status->control);
2896 /* FIXME: code repetition end */
2897
2898 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2899 status & 0xff, tx_resp->failure_frame);
2900 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2901 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2902
2903 agg->wait_for_ba = 0;
2904 } else {
2905 /* Two or more frames were attempted; expect block-ack */
2906 u64 bitmap = 0;
2907 int start = agg->start_idx;
2908
2909 /* Construct bit-map of pending frames within Tx window */
2910 for (i = 0; i < agg->frame_count; i++) {
2911 u16 sc;
2912 status = le16_to_cpu(frame_status[i].status);
2913 seq = le16_to_cpu(frame_status[i].sequence);
2914 idx = SEQ_TO_INDEX(seq);
2915 txq_id = SEQ_TO_QUEUE(seq);
2916
2917 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2918 AGG_TX_STATE_ABORT_MSK))
2919 continue;
2920
2921 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2922 agg->frame_count, txq_id, idx);
2923
2924 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2925
2926 sc = le16_to_cpu(hdr->seq_ctrl);
2927 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2928 IWL_ERROR("BUG_ON idx doesn't match seq control"
2929 " idx=%d, seq_idx=%d, seq=%d\n",
2930 idx, SEQ_TO_SN(sc),
2931 hdr->seq_ctrl);
2932 return -1;
2933 }
2934
2935 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2936 i, idx, SEQ_TO_SN(sc));
2937
2938 sh = idx - start;
2939 if (sh > 64) {
2940 sh = (start - idx) + 0xff;
2941 bitmap = bitmap << sh;
2942 sh = 0;
2943 start = idx;
2944 } else if (sh < -64)
2945 sh = 0xff - (start - idx);
2946 else if (sh < 0) {
2947 sh = start - idx;
2948 start = idx;
2949 bitmap = bitmap << sh;
2950 sh = 0;
2951 }
2952 bitmap |= (1 << sh);
2953 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2954 start, (u32)(bitmap & 0xFFFFFFFF));
2955 }
2956
2957 agg->bitmap = bitmap;
2958 agg->start_idx = start;
2959 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2960 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2961 agg->frame_count, agg->start_idx,
2962 (unsigned long long)agg->bitmap);
2963
2964 if (bitmap)
2965 agg->wait_for_ba = 1;
2966 }
2967 return 0;
2968 }
2969 #endif
2970
2971 /**
2972 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2973 */
2974 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2975 struct iwl4965_rx_mem_buffer *rxb)
2976 {
2977 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2978 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2979 int txq_id = SEQ_TO_QUEUE(sequence);
2980 int index = SEQ_TO_INDEX(sequence);
2981 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2982 struct ieee80211_tx_status *tx_status;
2983 struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2984 u32 status = le32_to_cpu(tx_resp->status);
2985 #ifdef CONFIG_IWL4965_HT
2986 int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2987 struct ieee80211_hdr *hdr;
2988 __le16 *qc;
2989 #endif
2990
2991 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2992 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2993 "is out of range [0-%d] %d %d\n", txq_id,
2994 index, txq->q.n_bd, txq->q.write_ptr,
2995 txq->q.read_ptr);
2996 return;
2997 }
2998
2999 #ifdef CONFIG_IWL4965_HT
3000 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3001 qc = ieee80211_get_qos_ctrl(hdr);
3002
3003 if (qc)
3004 tid = le16_to_cpu(*qc) & 0xf;
3005
3006 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3007 if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3008 IWL_ERROR("Station not known\n");
3009 return;
3010 }
3011
3012 if (txq->sched_retry) {
3013 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3014 struct iwl4965_ht_agg *agg = NULL;
3015
3016 if (!qc)
3017 return;
3018
3019 agg = &priv->stations[sta_id].tid[tid].agg;
3020
3021 iwl4965_tx_status_reply_tx(priv, agg,
3022 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3023
3024 if ((tx_resp->frame_count == 1) &&
3025 !iwl4965_is_tx_success(status)) {
3026 /* TODO: send BAR */
3027 }
3028
3029 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3030 int freed;
3031 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3032 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3033 "%d index %d\n", scd_ssn , index);
3034 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3035 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3036
3037 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3038 txq_id >= 0 && priv->mac80211_registered &&
3039 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3040 ieee80211_wake_queue(priv->hw, txq_id);
3041
3042 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3043 }
3044 } else {
3045 #endif /* CONFIG_IWL4965_HT */
3046 tx_status = &(txq->txb[txq->q.read_ptr].status);
3047
3048 tx_status->retry_count = tx_resp->failure_frame;
3049 tx_status->queue_number = status;
3050 tx_status->queue_length = tx_resp->bt_kill_count;
3051 tx_status->queue_length |= tx_resp->failure_rts;
3052 tx_status->flags =
3053 iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3054 iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3055 &tx_status->control);
3056
3057 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3058 "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3059 status, le32_to_cpu(tx_resp->rate_n_flags),
3060 tx_resp->failure_frame);
3061
3062 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3063 if (index != -1) {
3064 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3065 #ifdef CONFIG_IWL4965_HT
3066 if (tid != MAX_TID_COUNT)
3067 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3068 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3069 (txq_id >= 0) &&
3070 priv->mac80211_registered)
3071 ieee80211_wake_queue(priv->hw, txq_id);
3072 if (tid != MAX_TID_COUNT)
3073 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3074 #endif
3075 }
3076 #ifdef CONFIG_IWL4965_HT
3077 }
3078 #endif /* CONFIG_IWL4965_HT */
3079
3080 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3081 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3082 }
3083
3084
3085 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3086 struct iwl4965_rx_mem_buffer *rxb)
3087 {
3088 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3089 struct iwl4965_alive_resp *palive;
3090 struct delayed_work *pwork;
3091
3092 palive = &pkt->u.alive_frame;
3093
3094 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3095 "0x%01X 0x%01X\n",
3096 palive->is_valid, palive->ver_type,
3097 palive->ver_subtype);
3098
3099 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3100 IWL_DEBUG_INFO("Initialization Alive received.\n");
3101 memcpy(&priv->card_alive_init,
3102 &pkt->u.alive_frame,
3103 sizeof(struct iwl4965_init_alive_resp));
3104 pwork = &priv->init_alive_start;
3105 } else {
3106 IWL_DEBUG_INFO("Runtime Alive received.\n");
3107 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3108 sizeof(struct iwl4965_alive_resp));
3109 pwork = &priv->alive_start;
3110 }
3111
3112 /* We delay the ALIVE response by 5ms to
3113 * give the HW RF Kill time to activate... */
3114 if (palive->is_valid == UCODE_VALID_OK)
3115 queue_delayed_work(priv->workqueue, pwork,
3116 msecs_to_jiffies(5));
3117 else
3118 IWL_WARNING("uCode did not respond OK.\n");
3119 }
3120
3121 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3122 struct iwl4965_rx_mem_buffer *rxb)
3123 {
3124 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3125
3126 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3127 return;
3128 }
3129
3130 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3131 struct iwl4965_rx_mem_buffer *rxb)
3132 {
3133 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3134
3135 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3136 "seq 0x%04X ser 0x%08X\n",
3137 le32_to_cpu(pkt->u.err_resp.error_type),
3138 get_cmd_string(pkt->u.err_resp.cmd_id),
3139 pkt->u.err_resp.cmd_id,
3140 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3141 le32_to_cpu(pkt->u.err_resp.error_info));
3142 }
3143
3144 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3145
3146 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3147 {
3148 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3149 struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3150 struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3151 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3152 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3153 rxon->channel = csa->channel;
3154 priv->staging_rxon.channel = csa->channel;
3155 }
3156
3157 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3158 struct iwl4965_rx_mem_buffer *rxb)
3159 {
3160 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3161 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3162 struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3163
3164 if (!report->state) {
3165 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3166 "Spectrum Measure Notification: Start\n");
3167 return;
3168 }
3169
3170 memcpy(&priv->measure_report, report, sizeof(*report));
3171 priv->measurement_status |= MEASUREMENT_READY;
3172 #endif
3173 }
3174
3175 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3176 struct iwl4965_rx_mem_buffer *rxb)
3177 {
3178 #ifdef CONFIG_IWLWIFI_DEBUG
3179 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3180 struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3181 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3182 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3183 #endif
3184 }
3185
3186 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3187 struct iwl4965_rx_mem_buffer *rxb)
3188 {
3189 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3190 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3191 "notification for %s:\n",
3192 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3193 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3194 }
3195
3196 static void iwl4965_bg_beacon_update(struct work_struct *work)
3197 {
3198 struct iwl_priv *priv =
3199 container_of(work, struct iwl_priv, beacon_update);
3200 struct sk_buff *beacon;
3201
3202 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3203 beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3204
3205 if (!beacon) {
3206 IWL_ERROR("update beacon failed\n");
3207 return;
3208 }
3209
3210 mutex_lock(&priv->mutex);
3211 /* new beacon skb is allocated every time; dispose previous.*/
3212 if (priv->ibss_beacon)
3213 dev_kfree_skb(priv->ibss_beacon);
3214
3215 priv->ibss_beacon = beacon;
3216 mutex_unlock(&priv->mutex);
3217
3218 iwl4965_send_beacon_cmd(priv);
3219 }
3220
3221 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3222 struct iwl4965_rx_mem_buffer *rxb)
3223 {
3224 #ifdef CONFIG_IWLWIFI_DEBUG
3225 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3226 struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3227 u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3228
3229 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3230 "tsf %d %d rate %d\n",
3231 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3232 beacon->beacon_notify_hdr.failure_frame,
3233 le32_to_cpu(beacon->ibss_mgr_status),
3234 le32_to_cpu(beacon->high_tsf),
3235 le32_to_cpu(beacon->low_tsf), rate);
3236 #endif
3237
3238 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3239 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3240 queue_work(priv->workqueue, &priv->beacon_update);
3241 }
3242
3243 /* Service response to REPLY_SCAN_CMD (0x80) */
3244 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3245 struct iwl4965_rx_mem_buffer *rxb)
3246 {
3247 #ifdef CONFIG_IWLWIFI_DEBUG
3248 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3249 struct iwl4965_scanreq_notification *notif =
3250 (struct iwl4965_scanreq_notification *)pkt->u.raw;
3251
3252 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3253 #endif
3254 }
3255
3256 /* Service SCAN_START_NOTIFICATION (0x82) */
3257 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3258 struct iwl4965_rx_mem_buffer *rxb)
3259 {
3260 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3261 struct iwl4965_scanstart_notification *notif =
3262 (struct iwl4965_scanstart_notification *)pkt->u.raw;
3263 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3264 IWL_DEBUG_SCAN("Scan start: "
3265 "%d [802.11%s] "
3266 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3267 notif->channel,
3268 notif->band ? "bg" : "a",
3269 notif->tsf_high,
3270 notif->tsf_low, notif->status, notif->beacon_timer);
3271 }
3272
3273 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3274 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3275 struct iwl4965_rx_mem_buffer *rxb)
3276 {
3277 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3278 struct iwl4965_scanresults_notification *notif =
3279 (struct iwl4965_scanresults_notification *)pkt->u.raw;
3280
3281 IWL_DEBUG_SCAN("Scan ch.res: "
3282 "%d [802.11%s] "
3283 "(TSF: 0x%08X:%08X) - %d "
3284 "elapsed=%lu usec (%dms since last)\n",
3285 notif->channel,
3286 notif->band ? "bg" : "a",
3287 le32_to_cpu(notif->tsf_high),
3288 le32_to_cpu(notif->tsf_low),
3289 le32_to_cpu(notif->statistics[0]),
3290 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3291 jiffies_to_msecs(elapsed_jiffies
3292 (priv->last_scan_jiffies, jiffies)));
3293
3294 priv->last_scan_jiffies = jiffies;
3295 priv->next_scan_jiffies = 0;
3296 }
3297
3298 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3299 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3300 struct iwl4965_rx_mem_buffer *rxb)
3301 {
3302 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3303 struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3304
3305 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3306 scan_notif->scanned_channels,
3307 scan_notif->tsf_low,
3308 scan_notif->tsf_high, scan_notif->status);
3309
3310 /* The HW is no longer scanning */
3311 clear_bit(STATUS_SCAN_HW, &priv->status);
3312
3313 /* The scan completion notification came in, so kill that timer... */
3314 cancel_delayed_work(&priv->scan_check);
3315
3316 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3317 (priv->scan_bands == 2) ? "2.4" : "5.2",
3318 jiffies_to_msecs(elapsed_jiffies
3319 (priv->scan_pass_start, jiffies)));
3320
3321 /* Remove this scanned band from the list
3322 * of pending bands to scan */
3323 priv->scan_bands--;
3324
3325 /* If a request to abort was given, or the scan did not succeed
3326 * then we reset the scan state machine and terminate,
3327 * re-queuing another scan if one has been requested */
3328 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3329 IWL_DEBUG_INFO("Aborted scan completed.\n");
3330 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3331 } else {
3332 /* If there are more bands on this scan pass reschedule */
3333 if (priv->scan_bands > 0)
3334 goto reschedule;
3335 }
3336
3337 priv->last_scan_jiffies = jiffies;
3338 priv->next_scan_jiffies = 0;
3339 IWL_DEBUG_INFO("Setting scan to off\n");
3340
3341 clear_bit(STATUS_SCANNING, &priv->status);
3342
3343 IWL_DEBUG_INFO("Scan took %dms\n",
3344 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3345
3346 queue_work(priv->workqueue, &priv->scan_completed);
3347
3348 return;
3349
3350 reschedule:
3351 priv->scan_pass_start = jiffies;
3352 queue_work(priv->workqueue, &priv->request_scan);
3353 }
3354
3355 /* Handle notification from uCode that card's power state is changing
3356 * due to software, hardware, or critical temperature RFKILL */
3357 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3358 struct iwl4965_rx_mem_buffer *rxb)
3359 {
3360 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3361 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3362 unsigned long status = priv->status;
3363
3364 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3365 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3366 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3367
3368 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3369 RF_CARD_DISABLED)) {
3370
3371 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3372 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3373
3374 if (!iwl_grab_nic_access(priv)) {
3375 iwl_write_direct32(
3376 priv, HBUS_TARG_MBX_C,
3377 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3378
3379 iwl_release_nic_access(priv);
3380 }
3381
3382 if (!(flags & RXON_CARD_DISABLED)) {
3383 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3384 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3385 if (!iwl_grab_nic_access(priv)) {
3386 iwl_write_direct32(
3387 priv, HBUS_TARG_MBX_C,
3388 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3389
3390 iwl_release_nic_access(priv);
3391 }
3392 }
3393
3394 if (flags & RF_CARD_DISABLED) {
3395 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3396 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3397 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3398 if (!iwl_grab_nic_access(priv))
3399 iwl_release_nic_access(priv);
3400 }
3401 }
3402
3403 if (flags & HW_CARD_DISABLED)
3404 set_bit(STATUS_RF_KILL_HW, &priv->status);
3405 else
3406 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3407
3408
3409 if (flags & SW_CARD_DISABLED)
3410 set_bit(STATUS_RF_KILL_SW, &priv->status);
3411 else
3412 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3413
3414 if (!(flags & RXON_CARD_DISABLED))
3415 iwl4965_scan_cancel(priv);
3416
3417 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3418 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3419 (test_bit(STATUS_RF_KILL_SW, &status) !=
3420 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3421 queue_work(priv->workqueue, &priv->rf_kill);
3422 else
3423 wake_up_interruptible(&priv->wait_command_queue);
3424 }
3425
3426 /**
3427 * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3428 *
3429 * Setup the RX handlers for each of the reply types sent from the uCode
3430 * to the host.
3431 *
3432 * This function chains into the hardware specific files for them to setup
3433 * any hardware specific handlers as well.
3434 */
3435 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3436 {
3437 priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3438 priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3439 priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3440 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3441 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3442 iwl4965_rx_spectrum_measure_notif;
3443 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3444 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3445 iwl4965_rx_pm_debug_statistics_notif;
3446 priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3447
3448 /*
3449 * The same handler is used for both the REPLY to a discrete
3450 * statistics request from the host as well as for the periodic
3451 * statistics notifications (after received beacons) from the uCode.
3452 */
3453 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3454 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3455
3456 priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3457 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3458 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3459 iwl4965_rx_scan_results_notif;
3460 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3461 iwl4965_rx_scan_complete_notif;
3462 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3463 priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3464
3465 /* Set up hardware specific Rx handlers */
3466 iwl4965_hw_rx_handler_setup(priv);
3467 }
3468
3469 /**
3470 * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3471 * @rxb: Rx buffer to reclaim
3472 *
3473 * If an Rx buffer has an async callback associated with it the callback
3474 * will be executed. The attached skb (if present) will only be freed
3475 * if the callback returns 1
3476 */
3477 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3478 struct iwl4965_rx_mem_buffer *rxb)
3479 {
3480 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3481 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3482 int txq_id = SEQ_TO_QUEUE(sequence);
3483 int index = SEQ_TO_INDEX(sequence);
3484 int huge = sequence & SEQ_HUGE_FRAME;
3485 int cmd_index;
3486 struct iwl_cmd *cmd;
3487
3488 /* If a Tx command is being handled and it isn't in the actual
3489 * command queue then there a command routing bug has been introduced
3490 * in the queue management code. */
3491 if (txq_id != IWL_CMD_QUEUE_NUM)
3492 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3493 txq_id, pkt->hdr.cmd);
3494 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3495
3496 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3497 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3498
3499 /* Input error checking is done when commands are added to queue. */
3500 if (cmd->meta.flags & CMD_WANT_SKB) {
3501 cmd->meta.source->u.skb = rxb->skb;
3502 rxb->skb = NULL;
3503 } else if (cmd->meta.u.callback &&
3504 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3505 rxb->skb = NULL;
3506
3507 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3508
3509 if (!(cmd->meta.flags & CMD_ASYNC)) {
3510 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3511 wake_up_interruptible(&priv->wait_command_queue);
3512 }
3513 }
3514
3515 /************************** RX-FUNCTIONS ****************************/
3516 /*
3517 * Rx theory of operation
3518 *
3519 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3520 * each of which point to Receive Buffers to be filled by 4965. These get
3521 * used not only for Rx frames, but for any command response or notification
3522 * from the 4965. The driver and 4965 manage the Rx buffers by means
3523 * of indexes into the circular buffer.
3524 *
3525 * Rx Queue Indexes
3526 * The host/firmware share two index registers for managing the Rx buffers.
3527 *
3528 * The READ index maps to the first position that the firmware may be writing
3529 * to -- the driver can read up to (but not including) this position and get
3530 * good data.
3531 * The READ index is managed by the firmware once the card is enabled.
3532 *
3533 * The WRITE index maps to the last position the driver has read from -- the
3534 * position preceding WRITE is the last slot the firmware can place a packet.
3535 *
3536 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3537 * WRITE = READ.
3538 *
3539 * During initialization, the host sets up the READ queue position to the first
3540 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3541 *
3542 * When the firmware places a packet in a buffer, it will advance the READ index
3543 * and fire the RX interrupt. The driver can then query the READ index and
3544 * process as many packets as possible, moving the WRITE index forward as it
3545 * resets the Rx queue buffers with new memory.
3546 *
3547 * The management in the driver is as follows:
3548 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3549 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3550 * to replenish the iwl->rxq->rx_free.
3551 * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3552 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3553 * 'processed' and 'read' driver indexes as well)
3554 * + A received packet is processed and handed to the kernel network stack,
3555 * detached from the iwl->rxq. The driver 'processed' index is updated.
3556 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3557 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3558 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3559 * were enough free buffers and RX_STALLED is set it is cleared.
3560 *
3561 *
3562 * Driver sequence:
3563 *
3564 * iwl4965_rx_queue_alloc() Allocates rx_free
3565 * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
3566 * iwl4965_rx_queue_restock
3567 * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3568 * queue, updates firmware pointers, and updates
3569 * the WRITE index. If insufficient rx_free buffers
3570 * are available, schedules iwl4965_rx_replenish
3571 *
3572 * -- enable interrupts --
3573 * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
3574 * READ INDEX, detaching the SKB from the pool.
3575 * Moves the packet buffer from queue to rx_used.
3576 * Calls iwl4965_rx_queue_restock to refill any empty
3577 * slots.
3578 * ...
3579 *
3580 */
3581
3582 /**
3583 * iwl4965_rx_queue_space - Return number of free slots available in queue.
3584 */
3585 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3586 {
3587 int s = q->read - q->write;
3588 if (s <= 0)
3589 s += RX_QUEUE_SIZE;
3590 /* keep some buffer to not confuse full and empty queue */
3591 s -= 2;
3592 if (s < 0)
3593 s = 0;
3594 return s;
3595 }
3596
3597 /**
3598 * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3599 */
3600 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3601 {
3602 u32 reg = 0;
3603 int rc = 0;
3604 unsigned long flags;
3605
3606 spin_lock_irqsave(&q->lock, flags);
3607
3608 if (q->need_update == 0)
3609 goto exit_unlock;
3610
3611 /* If power-saving is in use, make sure device is awake */
3612 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3613 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3614
3615 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3616 iwl_set_bit(priv, CSR_GP_CNTRL,
3617 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3618 goto exit_unlock;
3619 }
3620
3621 rc = iwl_grab_nic_access(priv);
3622 if (rc)
3623 goto exit_unlock;
3624
3625 /* Device expects a multiple of 8 */
3626 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3627 q->write & ~0x7);
3628 iwl_release_nic_access(priv);
3629
3630 /* Else device is assumed to be awake */
3631 } else
3632 /* Device expects a multiple of 8 */
3633 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3634
3635
3636 q->need_update = 0;
3637
3638 exit_unlock:
3639 spin_unlock_irqrestore(&q->lock, flags);
3640 return rc;
3641 }
3642
3643 /**
3644 * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3645 */
3646 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3647 dma_addr_t dma_addr)
3648 {
3649 return cpu_to_le32((u32)(dma_addr >> 8));
3650 }
3651
3652
3653 /**
3654 * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3655 *
3656 * If there are slots in the RX queue that need to be restocked,
3657 * and we have free pre-allocated buffers, fill the ranks as much
3658 * as we can, pulling from rx_free.
3659 *
3660 * This moves the 'write' index forward to catch up with 'processed', and
3661 * also updates the memory address in the firmware to reference the new
3662 * target buffer.
3663 */
3664 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3665 {
3666 struct iwl4965_rx_queue *rxq = &priv->rxq;
3667 struct list_head *element;
3668 struct iwl4965_rx_mem_buffer *rxb;
3669 unsigned long flags;
3670 int write, rc;
3671
3672 spin_lock_irqsave(&rxq->lock, flags);
3673 write = rxq->write & ~0x7;
3674 while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3675 /* Get next free Rx buffer, remove from free list */
3676 element = rxq->rx_free.next;
3677 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3678 list_del(element);
3679
3680 /* Point to Rx buffer via next RBD in circular buffer */
3681 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3682 rxq->queue[rxq->write] = rxb;
3683 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3684 rxq->free_count--;
3685 }
3686 spin_unlock_irqrestore(&rxq->lock, flags);
3687 /* If the pre-allocated buffer pool is dropping low, schedule to
3688 * refill it */
3689 if (rxq->free_count <= RX_LOW_WATERMARK)
3690 queue_work(priv->workqueue, &priv->rx_replenish);
3691
3692
3693 /* If we've added more space for the firmware to place data, tell it.
3694 * Increment device's write pointer in multiples of 8. */
3695 if ((write != (rxq->write & ~0x7))
3696 || (abs(rxq->write - rxq->read) > 7)) {
3697 spin_lock_irqsave(&rxq->lock, flags);
3698 rxq->need_update = 1;
3699 spin_unlock_irqrestore(&rxq->lock, flags);
3700 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3701 if (rc)
3702 return rc;
3703 }
3704
3705 return 0;
3706 }
3707
3708 /**
3709 * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3710 *
3711 * When moving to rx_free an SKB is allocated for the slot.
3712 *
3713 * Also restock the Rx queue via iwl4965_rx_queue_restock.
3714 * This is called as a scheduled work item (except for during initialization)
3715 */
3716 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3717 {
3718 struct iwl4965_rx_queue *rxq = &priv->rxq;
3719 struct list_head *element;
3720 struct iwl4965_rx_mem_buffer *rxb;
3721 unsigned long flags;
3722 spin_lock_irqsave(&rxq->lock, flags);
3723 while (!list_empty(&rxq->rx_used)) {
3724 element = rxq->rx_used.next;
3725 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3726
3727 /* Alloc a new receive buffer */
3728 rxb->skb =
3729 alloc_skb(priv->hw_params.rx_buf_size,
3730 __GFP_NOWARN | GFP_ATOMIC);
3731 if (!rxb->skb) {
3732 if (net_ratelimit())
3733 printk(KERN_CRIT DRV_NAME
3734 ": Can not allocate SKB buffers\n");
3735 /* We don't reschedule replenish work here -- we will
3736 * call the restock method and if it still needs
3737 * more buffers it will schedule replenish */
3738 break;
3739 }
3740 priv->alloc_rxb_skb++;
3741 list_del(element);
3742
3743 /* Get physical address of RB/SKB */
3744 rxb->dma_addr =
3745 pci_map_single(priv->pci_dev, rxb->skb->data,
3746 priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3747 list_add_tail(&rxb->list, &rxq->rx_free);
3748 rxq->free_count++;
3749 }
3750 spin_unlock_irqrestore(&rxq->lock, flags);
3751 }
3752
3753 /*
3754 * this should be called while priv->lock is locked
3755 */
3756 static void __iwl4965_rx_replenish(void *data)
3757 {
3758 struct iwl_priv *priv = data;
3759
3760 iwl4965_rx_allocate(priv);
3761 iwl4965_rx_queue_restock(priv);
3762 }
3763
3764
3765 void iwl4965_rx_replenish(void *data)
3766 {
3767 struct iwl_priv *priv = data;
3768 unsigned long flags;
3769
3770 iwl4965_rx_allocate(priv);
3771
3772 spin_lock_irqsave(&priv->lock, flags);
3773 iwl4965_rx_queue_restock(priv);
3774 spin_unlock_irqrestore(&priv->lock, flags);
3775 }
3776
3777 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3778 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3779 * This free routine walks the list of POOL entries and if SKB is set to
3780 * non NULL it is unmapped and freed
3781 */
3782 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3783 {
3784 int i;
3785 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3786 if (rxq->pool[i].skb != NULL) {
3787 pci_unmap_single(priv->pci_dev,
3788 rxq->pool[i].dma_addr,
3789 priv->hw_params.rx_buf_size,
3790 PCI_DMA_FROMDEVICE);
3791 dev_kfree_skb(rxq->pool[i].skb);
3792 }
3793 }
3794
3795 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3796 rxq->dma_addr);
3797 rxq->bd = NULL;
3798 }
3799
3800 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3801 {
3802 struct iwl4965_rx_queue *rxq = &priv->rxq;
3803 struct pci_dev *dev = priv->pci_dev;
3804 int i;
3805
3806 spin_lock_init(&rxq->lock);
3807 INIT_LIST_HEAD(&rxq->rx_free);
3808 INIT_LIST_HEAD(&rxq->rx_used);
3809
3810 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3811 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3812 if (!rxq->bd)
3813 return -ENOMEM;
3814
3815 /* Fill the rx_used queue with _all_ of the Rx buffers */
3816 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3817 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3818
3819 /* Set us so that we have processed and used all buffers, but have
3820 * not restocked the Rx queue with fresh buffers */
3821 rxq->read = rxq->write = 0;
3822 rxq->free_count = 0;
3823 rxq->need_update = 0;
3824 return 0;
3825 }
3826
3827 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3828 {
3829 unsigned long flags;
3830 int i;
3831 spin_lock_irqsave(&rxq->lock, flags);
3832 INIT_LIST_HEAD(&rxq->rx_free);
3833 INIT_LIST_HEAD(&rxq->rx_used);
3834 /* Fill the rx_used queue with _all_ of the Rx buffers */
3835 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3836 /* In the reset function, these buffers may have been allocated
3837 * to an SKB, so we need to unmap and free potential storage */
3838 if (rxq->pool[i].skb != NULL) {
3839 pci_unmap_single(priv->pci_dev,
3840 rxq->pool[i].dma_addr,
3841 priv->hw_params.rx_buf_size,
3842 PCI_DMA_FROMDEVICE);
3843 priv->alloc_rxb_skb--;
3844 dev_kfree_skb(rxq->pool[i].skb);
3845 rxq->pool[i].skb = NULL;
3846 }
3847 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3848 }
3849
3850 /* Set us so that we have processed and used all buffers, but have
3851 * not restocked the Rx queue with fresh buffers */
3852 rxq->read = rxq->write = 0;
3853 rxq->free_count = 0;
3854 spin_unlock_irqrestore(&rxq->lock, flags);
3855 }
3856
3857 /* Convert linear signal-to-noise ratio into dB */
3858 static u8 ratio2dB[100] = {
3859 /* 0 1 2 3 4 5 6 7 8 9 */
3860 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3861 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3862 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3863 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3864 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3865 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3866 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3867 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3868 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3869 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
3870 };
3871
3872 /* Calculates a relative dB value from a ratio of linear
3873 * (i.e. not dB) signal levels.
3874 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3875 int iwl4965_calc_db_from_ratio(int sig_ratio)
3876 {
3877 /* 1000:1 or higher just report as 60 dB */
3878 if (sig_ratio >= 1000)
3879 return 60;
3880
3881 /* 100:1 or higher, divide by 10 and use table,
3882 * add 20 dB to make up for divide by 10 */
3883 if (sig_ratio >= 100)
3884 return (20 + (int)ratio2dB[sig_ratio/10]);
3885
3886 /* We shouldn't see this */
3887 if (sig_ratio < 1)
3888 return 0;
3889
3890 /* Use table for ratios 1:1 - 99:1 */
3891 return (int)ratio2dB[sig_ratio];
3892 }
3893
3894 #define PERFECT_RSSI (-20) /* dBm */
3895 #define WORST_RSSI (-95) /* dBm */
3896 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3897
3898 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3899 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3900 * about formulas used below. */
3901 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3902 {
3903 int sig_qual;
3904 int degradation = PERFECT_RSSI - rssi_dbm;
3905
3906 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3907 * as indicator; formula is (signal dbm - noise dbm).
3908 * SNR at or above 40 is a great signal (100%).
3909 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3910 * Weakest usable signal is usually 10 - 15 dB SNR. */
3911 if (noise_dbm) {
3912 if (rssi_dbm - noise_dbm >= 40)
3913 return 100;
3914 else if (rssi_dbm < noise_dbm)
3915 return 0;
3916 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3917
3918 /* Else use just the signal level.
3919 * This formula is a least squares fit of data points collected and
3920 * compared with a reference system that had a percentage (%) display
3921 * for signal quality. */
3922 } else
3923 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3924 (15 * RSSI_RANGE + 62 * degradation)) /
3925 (RSSI_RANGE * RSSI_RANGE);
3926
3927 if (sig_qual > 100)
3928 sig_qual = 100;
3929 else if (sig_qual < 1)
3930 sig_qual = 0;
3931
3932 return sig_qual;
3933 }
3934
3935 /**
3936 * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3937 *
3938 * Uses the priv->rx_handlers callback function array to invoke
3939 * the appropriate handlers, including command responses,
3940 * frame-received notifications, and other notifications.
3941 */
3942 static void iwl4965_rx_handle(struct iwl_priv *priv)
3943 {
3944 struct iwl4965_rx_mem_buffer *rxb;
3945 struct iwl4965_rx_packet *pkt;
3946 struct iwl4965_rx_queue *rxq = &priv->rxq;
3947 u32 r, i;
3948 int reclaim;
3949 unsigned long flags;
3950 u8 fill_rx = 0;
3951 u32 count = 8;
3952
3953 /* uCode's read index (stored in shared DRAM) indicates the last Rx
3954 * buffer that the driver may process (last buffer filled by ucode). */
3955 r = iwl4965_hw_get_rx_read(priv);
3956 i = rxq->read;
3957
3958 /* Rx interrupt, but nothing sent from uCode */
3959 if (i == r)
3960 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3961
3962 if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3963 fill_rx = 1;
3964
3965 while (i != r) {
3966 rxb = rxq->queue[i];
3967
3968 /* If an RXB doesn't have a Rx queue slot associated with it,
3969 * then a bug has been introduced in the queue refilling
3970 * routines -- catch it here */
3971 BUG_ON(rxb == NULL);
3972
3973 rxq->queue[i] = NULL;
3974
3975 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3976 priv->hw_params.rx_buf_size,
3977 PCI_DMA_FROMDEVICE);
3978 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3979
3980 /* Reclaim a command buffer only if this packet is a response
3981 * to a (driver-originated) command.
3982 * If the packet (e.g. Rx frame) originated from uCode,
3983 * there is no command buffer to reclaim.
3984 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3985 * but apparently a few don't get set; catch them here. */
3986 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3987 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3988 (pkt->hdr.cmd != REPLY_RX) &&
3989 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3990 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3991 (pkt->hdr.cmd != REPLY_TX);
3992
3993 /* Based on type of command response or notification,
3994 * handle those that need handling via function in
3995 * rx_handlers table. See iwl4965_setup_rx_handlers() */
3996 if (priv->rx_handlers[pkt->hdr.cmd]) {
3997 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3998 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3999 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4000 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4001 } else {
4002 /* No handling needed */
4003 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4004 "r %d i %d No handler needed for %s, 0x%02x\n",
4005 r, i, get_cmd_string(pkt->hdr.cmd),
4006 pkt->hdr.cmd);
4007 }
4008
4009 if (reclaim) {
4010 /* Invoke any callbacks, transfer the skb to caller, and
4011 * fire off the (possibly) blocking iwl_send_cmd()
4012 * as we reclaim the driver command queue */
4013 if (rxb && rxb->skb)
4014 iwl4965_tx_cmd_complete(priv, rxb);
4015 else
4016 IWL_WARNING("Claim null rxb?\n");
4017 }
4018
4019 /* For now we just don't re-use anything. We can tweak this
4020 * later to try and re-use notification packets and SKBs that
4021 * fail to Rx correctly */
4022 if (rxb->skb != NULL) {
4023 priv->alloc_rxb_skb--;
4024 dev_kfree_skb_any(rxb->skb);
4025 rxb->skb = NULL;
4026 }
4027
4028 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4029 priv->hw_params.rx_buf_size,
4030 PCI_DMA_FROMDEVICE);
4031 spin_lock_irqsave(&rxq->lock, flags);
4032 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4033 spin_unlock_irqrestore(&rxq->lock, flags);
4034 i = (i + 1) & RX_QUEUE_MASK;
4035 /* If there are a lot of unused frames,
4036 * restock the Rx queue so ucode wont assert. */
4037 if (fill_rx) {
4038 count++;
4039 if (count >= 8) {
4040 priv->rxq.read = i;
4041 __iwl4965_rx_replenish(priv);
4042 count = 0;
4043 }
4044 }
4045 }
4046
4047 /* Backtrack one entry */
4048 priv->rxq.read = i;
4049 iwl4965_rx_queue_restock(priv);
4050 }
4051
4052 /**
4053 * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4054 */
4055 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4056 struct iwl4965_tx_queue *txq)
4057 {
4058 u32 reg = 0;
4059 int rc = 0;
4060 int txq_id = txq->q.id;
4061
4062 if (txq->need_update == 0)
4063 return rc;
4064
4065 /* if we're trying to save power */
4066 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4067 /* wake up nic if it's powered down ...
4068 * uCode will wake up, and interrupt us again, so next
4069 * time we'll skip this part. */
4070 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4071
4072 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4073 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4074 iwl_set_bit(priv, CSR_GP_CNTRL,
4075 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4076 return rc;
4077 }
4078
4079 /* restore this queue's parameters in nic hardware. */
4080 rc = iwl_grab_nic_access(priv);
4081 if (rc)
4082 return rc;
4083 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4084 txq->q.write_ptr | (txq_id << 8));
4085 iwl_release_nic_access(priv);
4086
4087 /* else not in power-save mode, uCode will never sleep when we're
4088 * trying to tx (during RFKILL, we're not trying to tx). */
4089 } else
4090 iwl_write32(priv, HBUS_TARG_WRPTR,
4091 txq->q.write_ptr | (txq_id << 8));
4092
4093 txq->need_update = 0;
4094
4095 return rc;
4096 }
4097
4098 #ifdef CONFIG_IWLWIFI_DEBUG
4099 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4100 {
4101 DECLARE_MAC_BUF(mac);
4102
4103 IWL_DEBUG_RADIO("RX CONFIG:\n");
4104 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4105 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4106 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4107 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4108 le32_to_cpu(rxon->filter_flags));
4109 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4110 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4111 rxon->ofdm_basic_rates);
4112 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4113 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4114 print_mac(mac, rxon->node_addr));
4115 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4116 print_mac(mac, rxon->bssid_addr));
4117 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4118 }
4119 #endif
4120
4121 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4122 {
4123 IWL_DEBUG_ISR("Enabling interrupts\n");
4124 set_bit(STATUS_INT_ENABLED, &priv->status);
4125 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4126 }
4127
4128 /* call this function to flush any scheduled tasklet */
4129 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
4130 {
4131 /* wait to make sure we flush pedding tasklet*/
4132 synchronize_irq(priv->pci_dev->irq);
4133 tasklet_kill(&priv->irq_tasklet);
4134 }
4135
4136 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4137 {
4138 clear_bit(STATUS_INT_ENABLED, &priv->status);
4139
4140 /* disable interrupts from uCode/NIC to host */
4141 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4142
4143 /* acknowledge/clear/reset any interrupts still pending
4144 * from uCode or flow handler (Rx/Tx DMA) */
4145 iwl_write32(priv, CSR_INT, 0xffffffff);
4146 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4147 IWL_DEBUG_ISR("Disabled interrupts\n");
4148 }
4149
4150 static const char *desc_lookup(int i)
4151 {
4152 switch (i) {
4153 case 1:
4154 return "FAIL";
4155 case 2:
4156 return "BAD_PARAM";
4157 case 3:
4158 return "BAD_CHECKSUM";
4159 case 4:
4160 return "NMI_INTERRUPT";
4161 case 5:
4162 return "SYSASSERT";
4163 case 6:
4164 return "FATAL_ERROR";
4165 }
4166
4167 return "UNKNOWN";
4168 }
4169
4170 #define ERROR_START_OFFSET (1 * sizeof(u32))
4171 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4172
4173 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4174 {
4175 u32 data2, line;
4176 u32 desc, time, count, base, data1;
4177 u32 blink1, blink2, ilink1, ilink2;
4178 int rc;
4179
4180 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4181
4182 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4183 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4184 return;
4185 }
4186
4187 rc = iwl_grab_nic_access(priv);
4188 if (rc) {
4189 IWL_WARNING("Can not read from adapter at this time.\n");
4190 return;
4191 }
4192
4193 count = iwl_read_targ_mem(priv, base);
4194
4195 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4196 IWL_ERROR("Start IWL Error Log Dump:\n");
4197 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4198 }
4199
4200 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4201 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4202 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4203 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4204 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4205 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4206 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4207 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4208 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4209
4210 IWL_ERROR("Desc Time "
4211 "data1 data2 line\n");
4212 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4213 desc_lookup(desc), desc, time, data1, data2, line);
4214 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4215 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4216 ilink1, ilink2);
4217
4218 iwl_release_nic_access(priv);
4219 }
4220
4221 #define EVENT_START_OFFSET (4 * sizeof(u32))
4222
4223 /**
4224 * iwl4965_print_event_log - Dump error event log to syslog
4225 *
4226 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4227 */
4228 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4229 u32 num_events, u32 mode)
4230 {
4231 u32 i;
4232 u32 base; /* SRAM byte address of event log header */
4233 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4234 u32 ptr; /* SRAM byte address of log data */
4235 u32 ev, time, data; /* event log data */
4236
4237 if (num_events == 0)
4238 return;
4239
4240 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4241
4242 if (mode == 0)
4243 event_size = 2 * sizeof(u32);
4244 else
4245 event_size = 3 * sizeof(u32);
4246
4247 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4248
4249 /* "time" is actually "data" for mode 0 (no timestamp).
4250 * place event id # at far right for easier visual parsing. */
4251 for (i = 0; i < num_events; i++) {
4252 ev = iwl_read_targ_mem(priv, ptr);
4253 ptr += sizeof(u32);
4254 time = iwl_read_targ_mem(priv, ptr);
4255 ptr += sizeof(u32);
4256 if (mode == 0)
4257 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4258 else {
4259 data = iwl_read_targ_mem(priv, ptr);
4260 ptr += sizeof(u32);
4261 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4262 }
4263 }
4264 }
4265
4266 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4267 {
4268 int rc;
4269 u32 base; /* SRAM byte address of event log header */
4270 u32 capacity; /* event log capacity in # entries */
4271 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4272 u32 num_wraps; /* # times uCode wrapped to top of log */
4273 u32 next_entry; /* index of next entry to be written by uCode */
4274 u32 size; /* # entries that we'll print */
4275
4276 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4277 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4278 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4279 return;
4280 }
4281
4282 rc = iwl_grab_nic_access(priv);
4283 if (rc) {
4284 IWL_WARNING("Can not read from adapter at this time.\n");
4285 return;
4286 }
4287
4288 /* event log header */
4289 capacity = iwl_read_targ_mem(priv, base);
4290 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4291 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4292 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4293
4294 size = num_wraps ? capacity : next_entry;
4295
4296 /* bail out if nothing in log */
4297 if (size == 0) {
4298 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4299 iwl_release_nic_access(priv);
4300 return;
4301 }
4302
4303 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4304 size, num_wraps);
4305
4306 /* if uCode has wrapped back to top of log, start at the oldest entry,
4307 * i.e the next one that uCode would fill. */
4308 if (num_wraps)
4309 iwl4965_print_event_log(priv, next_entry,
4310 capacity - next_entry, mode);
4311
4312 /* (then/else) start at top of log */
4313 iwl4965_print_event_log(priv, 0, next_entry, mode);
4314
4315 iwl_release_nic_access(priv);
4316 }
4317
4318 /**
4319 * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4320 */
4321 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4322 {
4323 /* Set the FW error flag -- cleared on iwl4965_down */
4324 set_bit(STATUS_FW_ERROR, &priv->status);
4325
4326 /* Cancel currently queued command. */
4327 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4328
4329 #ifdef CONFIG_IWLWIFI_DEBUG
4330 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4331 iwl4965_dump_nic_error_log(priv);
4332 iwl4965_dump_nic_event_log(priv);
4333 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4334 }
4335 #endif
4336
4337 wake_up_interruptible(&priv->wait_command_queue);
4338
4339 /* Keep the restart process from trying to send host
4340 * commands by clearing the INIT status bit */
4341 clear_bit(STATUS_READY, &priv->status);
4342
4343 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4344 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4345 "Restarting adapter due to uCode error.\n");
4346
4347 if (iwl_is_associated(priv)) {
4348 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4349 sizeof(priv->recovery_rxon));
4350 priv->error_recovering = 1;
4351 }
4352 queue_work(priv->workqueue, &priv->restart);
4353 }
4354 }
4355
4356 static void iwl4965_error_recovery(struct iwl_priv *priv)
4357 {
4358 unsigned long flags;
4359
4360 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4361 sizeof(priv->staging_rxon));
4362 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4363 iwl4965_commit_rxon(priv);
4364
4365 iwl4965_rxon_add_station(priv, priv->bssid, 1);
4366
4367 spin_lock_irqsave(&priv->lock, flags);
4368 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4369 priv->error_recovering = 0;
4370 spin_unlock_irqrestore(&priv->lock, flags);
4371 }
4372
4373 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4374 {
4375 u32 inta, handled = 0;
4376 u32 inta_fh;
4377 unsigned long flags;
4378 #ifdef CONFIG_IWLWIFI_DEBUG
4379 u32 inta_mask;
4380 #endif
4381
4382 spin_lock_irqsave(&priv->lock, flags);
4383
4384 /* Ack/clear/reset pending uCode interrupts.
4385 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4386 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4387 inta = iwl_read32(priv, CSR_INT);
4388 iwl_write32(priv, CSR_INT, inta);
4389
4390 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4391 * Any new interrupts that happen after this, either while we're
4392 * in this tasklet, or later, will show up in next ISR/tasklet. */
4393 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4394 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4395
4396 #ifdef CONFIG_IWLWIFI_DEBUG
4397 if (iwl_debug_level & IWL_DL_ISR) {
4398 /* just for debug */
4399 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4400 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4401 inta, inta_mask, inta_fh);
4402 }
4403 #endif
4404
4405 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4406 * atomic, make sure that inta covers all the interrupts that
4407 * we've discovered, even if FH interrupt came in just after
4408 * reading CSR_INT. */
4409 if (inta_fh & CSR49_FH_INT_RX_MASK)
4410 inta |= CSR_INT_BIT_FH_RX;
4411 if (inta_fh & CSR49_FH_INT_TX_MASK)
4412 inta |= CSR_INT_BIT_FH_TX;
4413
4414 /* Now service all interrupt bits discovered above. */
4415 if (inta & CSR_INT_BIT_HW_ERR) {
4416 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4417
4418 /* Tell the device to stop sending interrupts */
4419 iwl4965_disable_interrupts(priv);
4420
4421 iwl4965_irq_handle_error(priv);
4422
4423 handled |= CSR_INT_BIT_HW_ERR;
4424
4425 spin_unlock_irqrestore(&priv->lock, flags);
4426
4427 return;
4428 }
4429
4430 #ifdef CONFIG_IWLWIFI_DEBUG
4431 if (iwl_debug_level & (IWL_DL_ISR)) {
4432 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4433 if (inta & CSR_INT_BIT_SCD)
4434 IWL_DEBUG_ISR("Scheduler finished to transmit "
4435 "the frame/frames.\n");
4436
4437 /* Alive notification via Rx interrupt will do the real work */
4438 if (inta & CSR_INT_BIT_ALIVE)
4439 IWL_DEBUG_ISR("Alive interrupt\n");
4440 }
4441 #endif
4442 /* Safely ignore these bits for debug checks below */
4443 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4444
4445 /* HW RF KILL switch toggled */
4446 if (inta & CSR_INT_BIT_RF_KILL) {
4447 int hw_rf_kill = 0;
4448 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4449 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4450 hw_rf_kill = 1;
4451
4452 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4453 "RF_KILL bit toggled to %s.\n",
4454 hw_rf_kill ? "disable radio":"enable radio");
4455
4456 /* Queue restart only if RF_KILL switch was set to "kill"
4457 * when we loaded driver, and is now set to "enable".
4458 * After we're Alive, RF_KILL gets handled by
4459 * iwl4965_rx_card_state_notif() */
4460 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4461 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4462 queue_work(priv->workqueue, &priv->restart);
4463 }
4464
4465 handled |= CSR_INT_BIT_RF_KILL;
4466 }
4467
4468 /* Chip got too hot and stopped itself */
4469 if (inta & CSR_INT_BIT_CT_KILL) {
4470 IWL_ERROR("Microcode CT kill error detected.\n");
4471 handled |= CSR_INT_BIT_CT_KILL;
4472 }
4473
4474 /* Error detected by uCode */
4475 if (inta & CSR_INT_BIT_SW_ERR) {
4476 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4477 inta);
4478 iwl4965_irq_handle_error(priv);
4479 handled |= CSR_INT_BIT_SW_ERR;
4480 }
4481
4482 /* uCode wakes up after power-down sleep */
4483 if (inta & CSR_INT_BIT_WAKEUP) {
4484 IWL_DEBUG_ISR("Wakeup interrupt\n");
4485 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4486 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4487 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4488 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4489 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4490 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4491 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4492
4493 handled |= CSR_INT_BIT_WAKEUP;
4494 }
4495
4496 /* All uCode command responses, including Tx command responses,
4497 * Rx "responses" (frame-received notification), and other
4498 * notifications from uCode come through here*/
4499 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4500 iwl4965_rx_handle(priv);
4501 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4502 }
4503
4504 if (inta & CSR_INT_BIT_FH_TX) {
4505 IWL_DEBUG_ISR("Tx interrupt\n");
4506 handled |= CSR_INT_BIT_FH_TX;
4507 }
4508
4509 if (inta & ~handled)
4510 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4511
4512 if (inta & ~CSR_INI_SET_MASK) {
4513 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4514 inta & ~CSR_INI_SET_MASK);
4515 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4516 }
4517
4518 /* Re-enable all interrupts */
4519 /* only Re-enable if diabled by irq */
4520 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4521 iwl4965_enable_interrupts(priv);
4522
4523 #ifdef CONFIG_IWLWIFI_DEBUG
4524 if (iwl_debug_level & (IWL_DL_ISR)) {
4525 inta = iwl_read32(priv, CSR_INT);
4526 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4527 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4528 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4529 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4530 }
4531 #endif
4532 spin_unlock_irqrestore(&priv->lock, flags);
4533 }
4534
4535 static irqreturn_t iwl4965_isr(int irq, void *data)
4536 {
4537 struct iwl_priv *priv = data;
4538 u32 inta, inta_mask;
4539 u32 inta_fh;
4540 if (!priv)
4541 return IRQ_NONE;
4542
4543 spin_lock(&priv->lock);
4544
4545 /* Disable (but don't clear!) interrupts here to avoid
4546 * back-to-back ISRs and sporadic interrupts from our NIC.
4547 * If we have something to service, the tasklet will re-enable ints.
4548 * If we *don't* have something, we'll re-enable before leaving here. */
4549 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4550 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4551
4552 /* Discover which interrupts are active/pending */
4553 inta = iwl_read32(priv, CSR_INT);
4554 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4555
4556 /* Ignore interrupt if there's nothing in NIC to service.
4557 * This may be due to IRQ shared with another device,
4558 * or due to sporadic interrupts thrown from our NIC. */
4559 if (!inta && !inta_fh) {
4560 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4561 goto none;
4562 }
4563
4564 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4565 /* Hardware disappeared. It might have already raised
4566 * an interrupt */
4567 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4568 goto unplugged;
4569 }
4570
4571 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4572 inta, inta_mask, inta_fh);
4573
4574 inta &= ~CSR_INT_BIT_SCD;
4575
4576 /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4577 if (likely(inta || inta_fh))
4578 tasklet_schedule(&priv->irq_tasklet);
4579
4580 unplugged:
4581 spin_unlock(&priv->lock);
4582 return IRQ_HANDLED;
4583
4584 none:
4585 /* re-enable interrupts here since we don't have anything to service. */
4586 /* only Re-enable if diabled by irq */
4587 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4588 iwl4965_enable_interrupts(priv);
4589 spin_unlock(&priv->lock);
4590 return IRQ_NONE;
4591 }
4592
4593 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4594 * sending probe req. This should be set long enough to hear probe responses
4595 * from more than one AP. */
4596 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
4597 #define IWL_ACTIVE_DWELL_TIME_52 (10)
4598
4599 /* For faster active scanning, scan will move to the next channel if fewer than
4600 * PLCP_QUIET_THRESH packets are heard on this channel within
4601 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
4602 * time if it's a quiet channel (nothing responded to our probe, and there's
4603 * no other traffic).
4604 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4605 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
4606 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
4607
4608 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4609 * Must be set longer than active dwell time.
4610 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4611 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
4612 #define IWL_PASSIVE_DWELL_TIME_52 (10)
4613 #define IWL_PASSIVE_DWELL_BASE (100)
4614 #define IWL_CHANNEL_TUNE_TIME 5
4615
4616 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4617 enum ieee80211_band band)
4618 {
4619 if (band == IEEE80211_BAND_5GHZ)
4620 return IWL_ACTIVE_DWELL_TIME_52;
4621 else
4622 return IWL_ACTIVE_DWELL_TIME_24;
4623 }
4624
4625 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4626 enum ieee80211_band band)
4627 {
4628 u16 active = iwl4965_get_active_dwell_time(priv, band);
4629 u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4630 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4631 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4632
4633 if (iwl_is_associated(priv)) {
4634 /* If we're associated, we clamp the maximum passive
4635 * dwell time to be 98% of the beacon interval (minus
4636 * 2 * channel tune time) */
4637 passive = priv->beacon_int;
4638 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4639 passive = IWL_PASSIVE_DWELL_BASE;
4640 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4641 }
4642
4643 if (passive <= active)
4644 passive = active + 1;
4645
4646 return passive;
4647 }
4648
4649 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4650 enum ieee80211_band band,
4651 u8 is_active, u8 direct_mask,
4652 struct iwl4965_scan_channel *scan_ch)
4653 {
4654 const struct ieee80211_channel *channels = NULL;
4655 const struct ieee80211_supported_band *sband;
4656 const struct iwl_channel_info *ch_info;
4657 u16 passive_dwell = 0;
4658 u16 active_dwell = 0;
4659 int added, i;
4660
4661 sband = iwl4965_get_hw_mode(priv, band);
4662 if (!sband)
4663 return 0;
4664
4665 channels = sband->channels;
4666
4667 active_dwell = iwl4965_get_active_dwell_time(priv, band);
4668 passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4669
4670 for (i = 0, added = 0; i < sband->n_channels; i++) {
4671 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4672 continue;
4673
4674 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
4675 le16_to_cpu(priv->active_rxon.channel)) {
4676 if (iwl_is_associated(priv)) {
4677 IWL_DEBUG_SCAN
4678 ("Skipping current channel %d\n",
4679 le16_to_cpu(priv->active_rxon.channel));
4680 continue;
4681 }
4682 } else if (priv->only_active_channel)
4683 continue;
4684
4685 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4686
4687 ch_info = iwl_get_channel_info(priv, band,
4688 scan_ch->channel);
4689 if (!is_channel_valid(ch_info)) {
4690 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4691 scan_ch->channel);
4692 continue;
4693 }
4694
4695 if (!is_active || is_channel_passive(ch_info) ||
4696 (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4697 scan_ch->type = 0; /* passive */
4698 else
4699 scan_ch->type = 1; /* active */
4700
4701 if (scan_ch->type & 1)
4702 scan_ch->type |= (direct_mask << 1);
4703
4704 if (is_channel_narrow(ch_info))
4705 scan_ch->type |= (1 << 7);
4706
4707 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4708 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4709
4710 /* Set txpower levels to defaults */
4711 scan_ch->tpc.dsp_atten = 110;
4712 /* scan_pwr_info->tpc.dsp_atten; */
4713
4714 /*scan_pwr_info->tpc.tx_gain; */
4715 if (band == IEEE80211_BAND_5GHZ)
4716 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4717 else {
4718 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4719 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4720 * power level:
4721 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4722 */
4723 }
4724
4725 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4726 scan_ch->channel,
4727 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4728 (scan_ch->type & 1) ?
4729 active_dwell : passive_dwell);
4730
4731 scan_ch++;
4732 added++;
4733 }
4734
4735 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4736 return added;
4737 }
4738
4739 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4740 struct ieee80211_rate *rates)
4741 {
4742 int i;
4743
4744 for (i = 0; i < IWL_RATE_COUNT; i++) {
4745 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4746 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4747 rates[i].hw_value_short = i;
4748 rates[i].flags = 0;
4749 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4750 /*
4751 * If CCK != 1M then set short preamble rate flag.
4752 */
4753 rates[i].flags |=
4754 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4755 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4756 }
4757 }
4758 }
4759
4760 /**
4761 * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4762 */
4763 int iwl4965_init_geos(struct iwl_priv *priv)
4764 {
4765 struct iwl_channel_info *ch;
4766 struct ieee80211_supported_band *sband;
4767 struct ieee80211_channel *channels;
4768 struct ieee80211_channel *geo_ch;
4769 struct ieee80211_rate *rates;
4770 int i = 0;
4771
4772 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4773 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4774 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4775 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4776 return 0;
4777 }
4778
4779 channels = kzalloc(sizeof(struct ieee80211_channel) *
4780 priv->channel_count, GFP_KERNEL);
4781 if (!channels)
4782 return -ENOMEM;
4783
4784 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4785 GFP_KERNEL);
4786 if (!rates) {
4787 kfree(channels);
4788 return -ENOMEM;
4789 }
4790
4791 /* 5.2GHz channels start after the 2.4GHz channels */
4792 sband = &priv->bands[IEEE80211_BAND_5GHZ];
4793 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4794 /* just OFDM */
4795 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4796 sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4797
4798 iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4799
4800 sband = &priv->bands[IEEE80211_BAND_2GHZ];
4801 sband->channels = channels;
4802 /* OFDM & CCK */
4803 sband->bitrates = rates;
4804 sband->n_bitrates = IWL_RATE_COUNT;
4805
4806 iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4807
4808 priv->ieee_channels = channels;
4809 priv->ieee_rates = rates;
4810
4811 iwl4965_init_hw_rates(priv, rates);
4812
4813 for (i = 0; i < priv->channel_count; i++) {
4814 ch = &priv->channel_info[i];
4815
4816 /* FIXME: might be removed if scan is OK */
4817 if (!is_channel_valid(ch))
4818 continue;
4819
4820 if (is_channel_a_band(ch))
4821 sband = &priv->bands[IEEE80211_BAND_5GHZ];
4822 else
4823 sband = &priv->bands[IEEE80211_BAND_2GHZ];
4824
4825 geo_ch = &sband->channels[sband->n_channels++];
4826
4827 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4828 geo_ch->max_power = ch->max_power_avg;
4829 geo_ch->max_antenna_gain = 0xff;
4830 geo_ch->hw_value = ch->channel;
4831
4832 if (is_channel_valid(ch)) {
4833 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4834 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4835
4836 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4837 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4838
4839 if (ch->flags & EEPROM_CHANNEL_RADAR)
4840 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4841
4842 if (ch->max_power_avg > priv->max_channel_txpower_limit)
4843 priv->max_channel_txpower_limit =
4844 ch->max_power_avg;
4845 } else {
4846 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4847 }
4848
4849 /* Save flags for reg domain usage */
4850 geo_ch->orig_flags = geo_ch->flags;
4851
4852 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4853 ch->channel, geo_ch->center_freq,
4854 is_channel_a_band(ch) ? "5.2" : "2.4",
4855 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4856 "restricted" : "valid",
4857 geo_ch->flags);
4858 }
4859
4860 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4861 priv->cfg->sku & IWL_SKU_A) {
4862 printk(KERN_INFO DRV_NAME
4863 ": Incorrectly detected BG card as ABG. Please send "
4864 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4865 priv->pci_dev->device, priv->pci_dev->subsystem_device);
4866 priv->cfg->sku &= ~IWL_SKU_A;
4867 }
4868
4869 printk(KERN_INFO DRV_NAME
4870 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4871 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4872 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4873
4874 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4875 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4876 &priv->bands[IEEE80211_BAND_2GHZ];
4877 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4878 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4879 &priv->bands[IEEE80211_BAND_5GHZ];
4880
4881 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4882
4883 return 0;
4884 }
4885
4886 /*
4887 * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4888 */
4889 void iwl4965_free_geos(struct iwl_priv *priv)
4890 {
4891 kfree(priv->ieee_channels);
4892 kfree(priv->ieee_rates);
4893 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4894 }
4895
4896 /******************************************************************************
4897 *
4898 * uCode download functions
4899 *
4900 ******************************************************************************/
4901
4902 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4903 {
4904 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4905 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4906 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4907 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4908 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4909 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4910 }
4911
4912 /**
4913 * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4914 * looking at all data.
4915 */
4916 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4917 u32 len)
4918 {
4919 u32 val;
4920 u32 save_len = len;
4921 int rc = 0;
4922 u32 errcnt;
4923
4924 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4925
4926 rc = iwl_grab_nic_access(priv);
4927 if (rc)
4928 return rc;
4929
4930 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4931
4932 errcnt = 0;
4933 for (; len > 0; len -= sizeof(u32), image++) {
4934 /* read data comes through single port, auto-incr addr */
4935 /* NOTE: Use the debugless read so we don't flood kernel log
4936 * if IWL_DL_IO is set */
4937 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4938 if (val != le32_to_cpu(*image)) {
4939 IWL_ERROR("uCode INST section is invalid at "
4940 "offset 0x%x, is 0x%x, s/b 0x%x\n",
4941 save_len - len, val, le32_to_cpu(*image));
4942 rc = -EIO;
4943 errcnt++;
4944 if (errcnt >= 20)
4945 break;
4946 }
4947 }
4948
4949 iwl_release_nic_access(priv);
4950
4951 if (!errcnt)
4952 IWL_DEBUG_INFO
4953 ("ucode image in INSTRUCTION memory is good\n");
4954
4955 return rc;
4956 }
4957
4958
4959 /**
4960 * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4961 * using sample data 100 bytes apart. If these sample points are good,
4962 * it's a pretty good bet that everything between them is good, too.
4963 */
4964 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4965 {
4966 u32 val;
4967 int rc = 0;
4968 u32 errcnt = 0;
4969 u32 i;
4970
4971 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4972
4973 rc = iwl_grab_nic_access(priv);
4974 if (rc)
4975 return rc;
4976
4977 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4978 /* read data comes through single port, auto-incr addr */
4979 /* NOTE: Use the debugless read so we don't flood kernel log
4980 * if IWL_DL_IO is set */
4981 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4982 i + RTC_INST_LOWER_BOUND);
4983 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4984 if (val != le32_to_cpu(*image)) {
4985 #if 0 /* Enable this if you want to see details */
4986 IWL_ERROR("uCode INST section is invalid at "
4987 "offset 0x%x, is 0x%x, s/b 0x%x\n",
4988 i, val, *image);
4989 #endif
4990 rc = -EIO;
4991 errcnt++;
4992 if (errcnt >= 3)
4993 break;
4994 }
4995 }
4996
4997 iwl_release_nic_access(priv);
4998
4999 return rc;
5000 }
5001
5002
5003 /**
5004 * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5005 * and verify its contents
5006 */
5007 static int iwl4965_verify_ucode(struct iwl_priv *priv)
5008 {
5009 __le32 *image;
5010 u32 len;
5011 int rc = 0;
5012
5013 /* Try bootstrap */
5014 image = (__le32 *)priv->ucode_boot.v_addr;
5015 len = priv->ucode_boot.len;
5016 rc = iwl4965_verify_inst_sparse(priv, image, len);
5017 if (rc == 0) {
5018 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5019 return 0;
5020 }
5021
5022 /* Try initialize */
5023 image = (__le32 *)priv->ucode_init.v_addr;
5024 len = priv->ucode_init.len;
5025 rc = iwl4965_verify_inst_sparse(priv, image, len);
5026 if (rc == 0) {
5027 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5028 return 0;
5029 }
5030
5031 /* Try runtime/protocol */
5032 image = (__le32 *)priv->ucode_code.v_addr;
5033 len = priv->ucode_code.len;
5034 rc = iwl4965_verify_inst_sparse(priv, image, len);
5035 if (rc == 0) {
5036 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5037 return 0;
5038 }
5039
5040 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5041
5042 /* Since nothing seems to match, show first several data entries in
5043 * instruction SRAM, so maybe visual inspection will give a clue.
5044 * Selection of bootstrap image (vs. other images) is arbitrary. */
5045 image = (__le32 *)priv->ucode_boot.v_addr;
5046 len = priv->ucode_boot.len;
5047 rc = iwl4965_verify_inst_full(priv, image, len);
5048
5049 return rc;
5050 }
5051
5052 static void iwl4965_nic_start(struct iwl_priv *priv)
5053 {
5054 /* Remove all resets to allow NIC to operate */
5055 iwl_write32(priv, CSR_RESET, 0);
5056 }
5057
5058
5059 /**
5060 * iwl4965_read_ucode - Read uCode images from disk file.
5061 *
5062 * Copy into buffers for card to fetch via bus-mastering
5063 */
5064 static int iwl4965_read_ucode(struct iwl_priv *priv)
5065 {
5066 struct iwl4965_ucode *ucode;
5067 int ret;
5068 const struct firmware *ucode_raw;
5069 const char *name = priv->cfg->fw_name;
5070 u8 *src;
5071 size_t len;
5072 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5073
5074 /* Ask kernel firmware_class module to get the boot firmware off disk.
5075 * request_firmware() is synchronous, file is in memory on return. */
5076 ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5077 if (ret < 0) {
5078 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5079 name, ret);
5080 goto error;
5081 }
5082
5083 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5084 name, ucode_raw->size);
5085
5086 /* Make sure that we got at least our header! */
5087 if (ucode_raw->size < sizeof(*ucode)) {
5088 IWL_ERROR("File size way too small!\n");
5089 ret = -EINVAL;
5090 goto err_release;
5091 }
5092
5093 /* Data from ucode file: header followed by uCode images */
5094 ucode = (void *)ucode_raw->data;
5095
5096 ver = le32_to_cpu(ucode->ver);
5097 inst_size = le32_to_cpu(ucode->inst_size);
5098 data_size = le32_to_cpu(ucode->data_size);
5099 init_size = le32_to_cpu(ucode->init_size);
5100 init_data_size = le32_to_cpu(ucode->init_data_size);
5101 boot_size = le32_to_cpu(ucode->boot_size);
5102
5103 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5104 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5105 inst_size);
5106 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5107 data_size);
5108 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5109 init_size);
5110 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5111 init_data_size);
5112 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5113 boot_size);
5114
5115 /* Verify size of file vs. image size info in file's header */
5116 if (ucode_raw->size < sizeof(*ucode) +
5117 inst_size + data_size + init_size +
5118 init_data_size + boot_size) {
5119
5120 IWL_DEBUG_INFO("uCode file size %d too small\n",
5121 (int)ucode_raw->size);
5122 ret = -EINVAL;
5123 goto err_release;
5124 }
5125
5126 /* Verify that uCode images will fit in card's SRAM */
5127 if (inst_size > IWL_MAX_INST_SIZE) {
5128 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5129 inst_size);
5130 ret = -EINVAL;
5131 goto err_release;
5132 }
5133
5134 if (data_size > IWL_MAX_DATA_SIZE) {
5135 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5136 data_size);
5137 ret = -EINVAL;
5138 goto err_release;
5139 }
5140 if (init_size > IWL_MAX_INST_SIZE) {
5141 IWL_DEBUG_INFO
5142 ("uCode init instr len %d too large to fit in\n",
5143 init_size);
5144 ret = -EINVAL;
5145 goto err_release;
5146 }
5147 if (init_data_size > IWL_MAX_DATA_SIZE) {
5148 IWL_DEBUG_INFO
5149 ("uCode init data len %d too large to fit in\n",
5150 init_data_size);
5151 ret = -EINVAL;
5152 goto err_release;
5153 }
5154 if (boot_size > IWL_MAX_BSM_SIZE) {
5155 IWL_DEBUG_INFO
5156 ("uCode boot instr len %d too large to fit in\n",
5157 boot_size);
5158 ret = -EINVAL;
5159 goto err_release;
5160 }
5161
5162 /* Allocate ucode buffers for card's bus-master loading ... */
5163
5164 /* Runtime instructions and 2 copies of data:
5165 * 1) unmodified from disk
5166 * 2) backup cache for save/restore during power-downs */
5167 priv->ucode_code.len = inst_size;
5168 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5169
5170 priv->ucode_data.len = data_size;
5171 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5172
5173 priv->ucode_data_backup.len = data_size;
5174 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5175
5176 /* Initialization instructions and data */
5177 if (init_size && init_data_size) {
5178 priv->ucode_init.len = init_size;
5179 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5180
5181 priv->ucode_init_data.len = init_data_size;
5182 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5183
5184 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5185 goto err_pci_alloc;
5186 }
5187
5188 /* Bootstrap (instructions only, no data) */
5189 if (boot_size) {
5190 priv->ucode_boot.len = boot_size;
5191 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5192
5193 if (!priv->ucode_boot.v_addr)
5194 goto err_pci_alloc;
5195 }
5196
5197 /* Copy images into buffers for card's bus-master reads ... */
5198
5199 /* Runtime instructions (first block of data in file) */
5200 src = &ucode->data[0];
5201 len = priv->ucode_code.len;
5202 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5203 memcpy(priv->ucode_code.v_addr, src, len);
5204 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5205 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5206
5207 /* Runtime data (2nd block)
5208 * NOTE: Copy into backup buffer will be done in iwl4965_up() */
5209 src = &ucode->data[inst_size];
5210 len = priv->ucode_data.len;
5211 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5212 memcpy(priv->ucode_data.v_addr, src, len);
5213 memcpy(priv->ucode_data_backup.v_addr, src, len);
5214
5215 /* Initialization instructions (3rd block) */
5216 if (init_size) {
5217 src = &ucode->data[inst_size + data_size];
5218 len = priv->ucode_init.len;
5219 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5220 len);
5221 memcpy(priv->ucode_init.v_addr, src, len);
5222 }
5223
5224 /* Initialization data (4th block) */
5225 if (init_data_size) {
5226 src = &ucode->data[inst_size + data_size + init_size];
5227 len = priv->ucode_init_data.len;
5228 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5229 len);
5230 memcpy(priv->ucode_init_data.v_addr, src, len);
5231 }
5232
5233 /* Bootstrap instructions (5th block) */
5234 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5235 len = priv->ucode_boot.len;
5236 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5237 memcpy(priv->ucode_boot.v_addr, src, len);
5238
5239 /* We have our copies now, allow OS release its copies */
5240 release_firmware(ucode_raw);
5241 return 0;
5242
5243 err_pci_alloc:
5244 IWL_ERROR("failed to allocate pci memory\n");
5245 ret = -ENOMEM;
5246 iwl4965_dealloc_ucode_pci(priv);
5247
5248 err_release:
5249 release_firmware(ucode_raw);
5250
5251 error:
5252 return ret;
5253 }
5254
5255
5256 /**
5257 * iwl4965_set_ucode_ptrs - Set uCode address location
5258 *
5259 * Tell initialization uCode where to find runtime uCode.
5260 *
5261 * BSM registers initially contain pointers to initialization uCode.
5262 * We need to replace them to load runtime uCode inst and data,
5263 * and to save runtime data when powering down.
5264 */
5265 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5266 {
5267 dma_addr_t pinst;
5268 dma_addr_t pdata;
5269 int rc = 0;
5270 unsigned long flags;
5271
5272 /* bits 35:4 for 4965 */
5273 pinst = priv->ucode_code.p_addr >> 4;
5274 pdata = priv->ucode_data_backup.p_addr >> 4;
5275
5276 spin_lock_irqsave(&priv->lock, flags);
5277 rc = iwl_grab_nic_access(priv);
5278 if (rc) {
5279 spin_unlock_irqrestore(&priv->lock, flags);
5280 return rc;
5281 }
5282
5283 /* Tell bootstrap uCode where to find image to load */
5284 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5285 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5286 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5287 priv->ucode_data.len);
5288
5289 /* Inst bytecount must be last to set up, bit 31 signals uCode
5290 * that all new ptr/size info is in place */
5291 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5292 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5293
5294 iwl_release_nic_access(priv);
5295
5296 spin_unlock_irqrestore(&priv->lock, flags);
5297
5298 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5299
5300 return rc;
5301 }
5302
5303 /**
5304 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5305 *
5306 * Called after REPLY_ALIVE notification received from "initialize" uCode.
5307 *
5308 * The 4965 "initialize" ALIVE reply contains calibration data for:
5309 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
5310 * (3945 does not contain this data).
5311 *
5312 * Tell "initialize" uCode to go ahead and load the runtime uCode.
5313 */
5314 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5315 {
5316 /* Check alive response for "valid" sign from uCode */
5317 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5318 /* We had an error bringing up the hardware, so take it
5319 * all the way back down so we can try again */
5320 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5321 goto restart;
5322 }
5323
5324 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5325 * This is a paranoid check, because we would not have gotten the
5326 * "initialize" alive if code weren't properly loaded. */
5327 if (iwl4965_verify_ucode(priv)) {
5328 /* Runtime instruction load was bad;
5329 * take it all the way back down so we can try again */
5330 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5331 goto restart;
5332 }
5333
5334 /* Calculate temperature */
5335 priv->temperature = iwl4965_get_temperature(priv);
5336
5337 /* Send pointers to protocol/runtime uCode image ... init code will
5338 * load and launch runtime uCode, which will send us another "Alive"
5339 * notification. */
5340 IWL_DEBUG_INFO("Initialization Alive received.\n");
5341 if (iwl4965_set_ucode_ptrs(priv)) {
5342 /* Runtime instruction load won't happen;
5343 * take it all the way back down so we can try again */
5344 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5345 goto restart;
5346 }
5347 return;
5348
5349 restart:
5350 queue_work(priv->workqueue, &priv->restart);
5351 }
5352
5353
5354 /**
5355 * iwl4965_alive_start - called after REPLY_ALIVE notification received
5356 * from protocol/runtime uCode (initialization uCode's
5357 * Alive gets handled by iwl4965_init_alive_start()).
5358 */
5359 static void iwl4965_alive_start(struct iwl_priv *priv)
5360 {
5361 int ret = 0;
5362
5363 IWL_DEBUG_INFO("Runtime Alive received.\n");
5364
5365 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5366 /* We had an error bringing up the hardware, so take it
5367 * all the way back down so we can try again */
5368 IWL_DEBUG_INFO("Alive failed.\n");
5369 goto restart;
5370 }
5371
5372 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5373 * This is a paranoid check, because we would not have gotten the
5374 * "runtime" alive if code weren't properly loaded. */
5375 if (iwl4965_verify_ucode(priv)) {
5376 /* Runtime instruction load was bad;
5377 * take it all the way back down so we can try again */
5378 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5379 goto restart;
5380 }
5381
5382 iwlcore_clear_stations_table(priv);
5383
5384 ret = priv->cfg->ops->lib->alive_notify(priv);
5385 if (ret) {
5386 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5387 ret);
5388 goto restart;
5389 }
5390
5391 /* After the ALIVE response, we can send host commands to 4965 uCode */
5392 set_bit(STATUS_ALIVE, &priv->status);
5393
5394 /* Clear out the uCode error bit if it is set */
5395 clear_bit(STATUS_FW_ERROR, &priv->status);
5396
5397 if (iwl_is_rfkill(priv))
5398 return;
5399
5400 ieee80211_start_queues(priv->hw);
5401
5402 priv->active_rate = priv->rates_mask;
5403 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5404
5405 iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5406
5407 if (iwl_is_associated(priv)) {
5408 struct iwl4965_rxon_cmd *active_rxon =
5409 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5410
5411 memcpy(&priv->staging_rxon, &priv->active_rxon,
5412 sizeof(priv->staging_rxon));
5413 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5414 } else {
5415 /* Initialize our rx_config data */
5416 iwl4965_connection_init_rx_config(priv);
5417 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5418 }
5419
5420 /* Configure Bluetooth device coexistence support */
5421 iwl4965_send_bt_config(priv);
5422
5423 /* Configure the adapter for unassociated operation */
5424 iwl4965_commit_rxon(priv);
5425
5426 /* At this point, the NIC is initialized and operational */
5427 priv->notif_missed_beacons = 0;
5428
5429 iwl4965_rf_kill_ct_config(priv);
5430
5431 iwl_leds_register(priv);
5432
5433 IWL_DEBUG_INFO("ALIVE processing complete.\n");
5434 set_bit(STATUS_READY, &priv->status);
5435 wake_up_interruptible(&priv->wait_command_queue);
5436
5437 if (priv->error_recovering)
5438 iwl4965_error_recovery(priv);
5439
5440 iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5441 ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5442 return;
5443
5444 restart:
5445 queue_work(priv->workqueue, &priv->restart);
5446 }
5447
5448 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5449
5450 static void __iwl4965_down(struct iwl_priv *priv)
5451 {
5452 unsigned long flags;
5453 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5454 struct ieee80211_conf *conf = NULL;
5455
5456 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5457
5458 conf = ieee80211_get_hw_conf(priv->hw);
5459
5460 if (!exit_pending)
5461 set_bit(STATUS_EXIT_PENDING, &priv->status);
5462
5463 iwl_leds_unregister(priv);
5464
5465 iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5466
5467 iwlcore_clear_stations_table(priv);
5468
5469 /* Unblock any waiting calls */
5470 wake_up_interruptible_all(&priv->wait_command_queue);
5471
5472 /* Wipe out the EXIT_PENDING status bit if we are not actually
5473 * exiting the module */
5474 if (!exit_pending)
5475 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5476
5477 /* stop and reset the on-board processor */
5478 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5479
5480 /* tell the device to stop sending interrupts */
5481 spin_lock_irqsave(&priv->lock, flags);
5482 iwl4965_disable_interrupts(priv);
5483 spin_unlock_irqrestore(&priv->lock, flags);
5484 iwl_synchronize_irq(priv);
5485
5486 if (priv->mac80211_registered)
5487 ieee80211_stop_queues(priv->hw);
5488
5489 /* If we have not previously called iwl4965_init() then
5490 * clear all bits but the RF Kill and SUSPEND bits and return */
5491 if (!iwl_is_init(priv)) {
5492 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5493 STATUS_RF_KILL_HW |
5494 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5495 STATUS_RF_KILL_SW |
5496 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5497 STATUS_GEO_CONFIGURED |
5498 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5499 STATUS_IN_SUSPEND;
5500 goto exit;
5501 }
5502
5503 /* ...otherwise clear out all the status bits but the RF Kill and
5504 * SUSPEND bits and continue taking the NIC down. */
5505 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5506 STATUS_RF_KILL_HW |
5507 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5508 STATUS_RF_KILL_SW |
5509 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5510 STATUS_GEO_CONFIGURED |
5511 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5512 STATUS_IN_SUSPEND |
5513 test_bit(STATUS_FW_ERROR, &priv->status) <<
5514 STATUS_FW_ERROR;
5515
5516 spin_lock_irqsave(&priv->lock, flags);
5517 iwl_clear_bit(priv, CSR_GP_CNTRL,
5518 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5519 spin_unlock_irqrestore(&priv->lock, flags);
5520
5521 iwl4965_hw_txq_ctx_stop(priv);
5522 iwl4965_hw_rxq_stop(priv);
5523
5524 spin_lock_irqsave(&priv->lock, flags);
5525 if (!iwl_grab_nic_access(priv)) {
5526 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5527 APMG_CLK_VAL_DMA_CLK_RQT);
5528 iwl_release_nic_access(priv);
5529 }
5530 spin_unlock_irqrestore(&priv->lock, flags);
5531
5532 udelay(5);
5533
5534 iwl4965_hw_nic_stop_master(priv);
5535 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5536 iwl4965_hw_nic_reset(priv);
5537
5538 exit:
5539 memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5540
5541 if (priv->ibss_beacon)
5542 dev_kfree_skb(priv->ibss_beacon);
5543 priv->ibss_beacon = NULL;
5544
5545 /* clear out any free frames */
5546 iwl4965_clear_free_frames(priv);
5547 }
5548
5549 static void iwl4965_down(struct iwl_priv *priv)
5550 {
5551 mutex_lock(&priv->mutex);
5552 __iwl4965_down(priv);
5553 mutex_unlock(&priv->mutex);
5554
5555 iwl4965_cancel_deferred_work(priv);
5556 }
5557
5558 #define MAX_HW_RESTARTS 5
5559
5560 static int __iwl4965_up(struct iwl_priv *priv)
5561 {
5562 int i;
5563 int ret;
5564
5565 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5566 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5567 return -EIO;
5568 }
5569
5570 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5571 IWL_WARNING("Radio disabled by SW RF kill (module "
5572 "parameter)\n");
5573 iwl_rfkill_set_hw_state(priv);
5574 return -ENODEV;
5575 }
5576
5577 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5578 IWL_ERROR("ucode not available for device bringup\n");
5579 return -EIO;
5580 }
5581
5582 /* If platform's RF_KILL switch is NOT set to KILL */
5583 if (iwl_read32(priv, CSR_GP_CNTRL) &
5584 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5585 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5586 else {
5587 set_bit(STATUS_RF_KILL_HW, &priv->status);
5588 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5589 iwl_rfkill_set_hw_state(priv);
5590 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5591 return -ENODEV;
5592 }
5593 }
5594
5595 iwl_rfkill_set_hw_state(priv);
5596 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5597
5598 ret = priv->cfg->ops->lib->hw_nic_init(priv);
5599 if (ret) {
5600 IWL_ERROR("Unable to init nic\n");
5601 return ret;
5602 }
5603
5604 /* make sure rfkill handshake bits are cleared */
5605 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5606 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5607 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5608
5609 /* clear (again), then enable host interrupts */
5610 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5611 iwl4965_enable_interrupts(priv);
5612
5613 /* really make sure rfkill handshake bits are cleared */
5614 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5615 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5616
5617 /* Copy original ucode data image from disk into backup cache.
5618 * This will be used to initialize the on-board processor's
5619 * data SRAM for a clean start when the runtime program first loads. */
5620 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5621 priv->ucode_data.len);
5622
5623 /* We return success when we resume from suspend and rf_kill is on. */
5624 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5625 return 0;
5626
5627 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5628
5629 iwlcore_clear_stations_table(priv);
5630
5631 /* load bootstrap state machine,
5632 * load bootstrap program into processor's memory,
5633 * prepare to load the "initialize" uCode */
5634 ret = priv->cfg->ops->lib->load_ucode(priv);
5635
5636 if (ret) {
5637 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5638 continue;
5639 }
5640
5641 /* start card; "initialize" will load runtime ucode */
5642 iwl4965_nic_start(priv);
5643
5644 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5645
5646 return 0;
5647 }
5648
5649 set_bit(STATUS_EXIT_PENDING, &priv->status);
5650 __iwl4965_down(priv);
5651
5652 /* tried to restart and config the device for as long as our
5653 * patience could withstand */
5654 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5655 return -EIO;
5656 }
5657
5658
5659 /*****************************************************************************
5660 *
5661 * Workqueue callbacks
5662 *
5663 *****************************************************************************/
5664
5665 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5666 {
5667 struct iwl_priv *priv =
5668 container_of(data, struct iwl_priv, init_alive_start.work);
5669
5670 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5671 return;
5672
5673 mutex_lock(&priv->mutex);
5674 iwl4965_init_alive_start(priv);
5675 mutex_unlock(&priv->mutex);
5676 }
5677
5678 static void iwl4965_bg_alive_start(struct work_struct *data)
5679 {
5680 struct iwl_priv *priv =
5681 container_of(data, struct iwl_priv, alive_start.work);
5682
5683 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5684 return;
5685
5686 mutex_lock(&priv->mutex);
5687 iwl4965_alive_start(priv);
5688 mutex_unlock(&priv->mutex);
5689 }
5690
5691 static void iwl4965_bg_rf_kill(struct work_struct *work)
5692 {
5693 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5694
5695 wake_up_interruptible(&priv->wait_command_queue);
5696
5697 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5698 return;
5699
5700 mutex_lock(&priv->mutex);
5701
5702 if (!iwl_is_rfkill(priv)) {
5703 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5704 "HW and/or SW RF Kill no longer active, restarting "
5705 "device\n");
5706 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5707 queue_work(priv->workqueue, &priv->restart);
5708 } else {
5709 /* make sure mac80211 stop sending Tx frame */
5710 if (priv->mac80211_registered)
5711 ieee80211_stop_queues(priv->hw);
5712
5713 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5714 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5715 "disabled by SW switch\n");
5716 else
5717 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5718 "Kill switch must be turned off for "
5719 "wireless networking to work.\n");
5720 }
5721 iwl_rfkill_set_hw_state(priv);
5722
5723 mutex_unlock(&priv->mutex);
5724 }
5725
5726 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5727
5728 static void iwl4965_bg_scan_check(struct work_struct *data)
5729 {
5730 struct iwl_priv *priv =
5731 container_of(data, struct iwl_priv, scan_check.work);
5732
5733 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5734 return;
5735
5736 mutex_lock(&priv->mutex);
5737 if (test_bit(STATUS_SCANNING, &priv->status) ||
5738 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5739 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5740 "Scan completion watchdog resetting adapter (%dms)\n",
5741 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5742
5743 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5744 iwl4965_send_scan_abort(priv);
5745 }
5746 mutex_unlock(&priv->mutex);
5747 }
5748
5749 static void iwl4965_bg_request_scan(struct work_struct *data)
5750 {
5751 struct iwl_priv *priv =
5752 container_of(data, struct iwl_priv, request_scan);
5753 struct iwl_host_cmd cmd = {
5754 .id = REPLY_SCAN_CMD,
5755 .len = sizeof(struct iwl4965_scan_cmd),
5756 .meta.flags = CMD_SIZE_HUGE,
5757 };
5758 struct iwl4965_scan_cmd *scan;
5759 struct ieee80211_conf *conf = NULL;
5760 u16 cmd_len;
5761 enum ieee80211_band band;
5762 u8 direct_mask;
5763 int ret = 0;
5764
5765 conf = ieee80211_get_hw_conf(priv->hw);
5766
5767 mutex_lock(&priv->mutex);
5768
5769 if (!iwl_is_ready(priv)) {
5770 IWL_WARNING("request scan called when driver not ready.\n");
5771 goto done;
5772 }
5773
5774 /* Make sure the scan wasn't cancelled before this queued work
5775 * was given the chance to run... */
5776 if (!test_bit(STATUS_SCANNING, &priv->status))
5777 goto done;
5778
5779 /* This should never be called or scheduled if there is currently
5780 * a scan active in the hardware. */
5781 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5782 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5783 "Ignoring second request.\n");
5784 ret = -EIO;
5785 goto done;
5786 }
5787
5788 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5789 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5790 goto done;
5791 }
5792
5793 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5794 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
5795 goto done;
5796 }
5797
5798 if (iwl_is_rfkill(priv)) {
5799 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5800 goto done;
5801 }
5802
5803 if (!test_bit(STATUS_READY, &priv->status)) {
5804 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
5805 goto done;
5806 }
5807
5808 if (!priv->scan_bands) {
5809 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5810 goto done;
5811 }
5812
5813 if (!priv->scan) {
5814 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5815 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5816 if (!priv->scan) {
5817 ret = -ENOMEM;
5818 goto done;
5819 }
5820 }
5821 scan = priv->scan;
5822 memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5823
5824 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5825 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5826
5827 if (iwl_is_associated(priv)) {
5828 u16 interval = 0;
5829 u32 extra;
5830 u32 suspend_time = 100;
5831 u32 scan_suspend_time = 100;
5832 unsigned long flags;
5833
5834 IWL_DEBUG_INFO("Scanning while associated...\n");
5835
5836 spin_lock_irqsave(&priv->lock, flags);
5837 interval = priv->beacon_int;
5838 spin_unlock_irqrestore(&priv->lock, flags);
5839
5840 scan->suspend_time = 0;
5841 scan->max_out_time = cpu_to_le32(200 * 1024);
5842 if (!interval)
5843 interval = suspend_time;
5844
5845 extra = (suspend_time / interval) << 22;
5846 scan_suspend_time = (extra |
5847 ((suspend_time % interval) * 1024));
5848 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5849 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5850 scan_suspend_time, interval);
5851 }
5852
5853 /* We should add the ability for user to lock to PASSIVE ONLY */
5854 if (priv->one_direct_scan) {
5855 IWL_DEBUG_SCAN
5856 ("Kicking off one direct scan for '%s'\n",
5857 iwl4965_escape_essid(priv->direct_ssid,
5858 priv->direct_ssid_len));
5859 scan->direct_scan[0].id = WLAN_EID_SSID;
5860 scan->direct_scan[0].len = priv->direct_ssid_len;
5861 memcpy(scan->direct_scan[0].ssid,
5862 priv->direct_ssid, priv->direct_ssid_len);
5863 direct_mask = 1;
5864 } else if (!iwl_is_associated(priv) && priv->essid_len) {
5865 scan->direct_scan[0].id = WLAN_EID_SSID;
5866 scan->direct_scan[0].len = priv->essid_len;
5867 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5868 direct_mask = 1;
5869 } else {
5870 direct_mask = 0;
5871 }
5872
5873 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5874 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5875 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5876
5877
5878 switch (priv->scan_bands) {
5879 case 2:
5880 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5881 scan->tx_cmd.rate_n_flags =
5882 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5883 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5884
5885 scan->good_CRC_th = 0;
5886 band = IEEE80211_BAND_2GHZ;
5887 break;
5888
5889 case 1:
5890 scan->tx_cmd.rate_n_flags =
5891 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5892 RATE_MCS_ANT_B_MSK);
5893 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5894 band = IEEE80211_BAND_5GHZ;
5895 break;
5896
5897 default:
5898 IWL_WARNING("Invalid scan band count\n");
5899 goto done;
5900 }
5901
5902 /* We don't build a direct scan probe request; the uCode will do
5903 * that based on the direct_mask added to each channel entry */
5904 cmd_len = iwl4965_fill_probe_req(priv, band,
5905 (struct ieee80211_mgmt *)scan->data,
5906 IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5907
5908 scan->tx_cmd.len = cpu_to_le16(cmd_len);
5909 /* select Rx chains */
5910
5911 /* Force use of chains B and C (0x6) for scan Rx.
5912 * Avoid A (0x1) because of its off-channel reception on A-band.
5913 * MIMO is not used here, but value is required to make uCode happy. */
5914 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5915 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5916 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5917 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5918
5919 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5920 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5921
5922 if (direct_mask) {
5923 IWL_DEBUG_SCAN
5924 ("Initiating direct scan for %s.\n",
5925 iwl4965_escape_essid(priv->essid, priv->essid_len));
5926 scan->channel_count =
5927 iwl4965_get_channels_for_scan(
5928 priv, band, 1, /* active */
5929 direct_mask,
5930 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5931 } else {
5932 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
5933 scan->channel_count =
5934 iwl4965_get_channels_for_scan(
5935 priv, band, 0, /* passive */
5936 direct_mask,
5937 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5938 }
5939
5940 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5941 scan->channel_count * sizeof(struct iwl4965_scan_channel);
5942 cmd.data = scan;
5943 scan->len = cpu_to_le16(cmd.len);
5944
5945 set_bit(STATUS_SCAN_HW, &priv->status);
5946 ret = iwl_send_cmd_sync(priv, &cmd);
5947 if (ret)
5948 goto done;
5949
5950 queue_delayed_work(priv->workqueue, &priv->scan_check,
5951 IWL_SCAN_CHECK_WATCHDOG);
5952
5953 mutex_unlock(&priv->mutex);
5954 return;
5955
5956 done:
5957 /* inform mac80211 scan aborted */
5958 queue_work(priv->workqueue, &priv->scan_completed);
5959 mutex_unlock(&priv->mutex);
5960 }
5961
5962 static void iwl4965_bg_up(struct work_struct *data)
5963 {
5964 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5965
5966 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5967 return;
5968
5969 mutex_lock(&priv->mutex);
5970 __iwl4965_up(priv);
5971 mutex_unlock(&priv->mutex);
5972 }
5973
5974 static void iwl4965_bg_restart(struct work_struct *data)
5975 {
5976 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5977
5978 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5979 return;
5980
5981 iwl4965_down(priv);
5982 queue_work(priv->workqueue, &priv->up);
5983 }
5984
5985 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5986 {
5987 struct iwl_priv *priv =
5988 container_of(data, struct iwl_priv, rx_replenish);
5989
5990 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5991 return;
5992
5993 mutex_lock(&priv->mutex);
5994 iwl4965_rx_replenish(priv);
5995 mutex_unlock(&priv->mutex);
5996 }
5997
5998 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5999
6000 static void iwl4965_post_associate(struct iwl_priv *priv)
6001 {
6002 struct ieee80211_conf *conf = NULL;
6003 int ret = 0;
6004 DECLARE_MAC_BUF(mac);
6005
6006 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6007 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6008 return;
6009 }
6010
6011 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6012 priv->assoc_id,
6013 print_mac(mac, priv->active_rxon.bssid_addr));
6014
6015
6016 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6017 return;
6018
6019
6020 if (!priv->vif || !priv->is_open)
6021 return;
6022
6023 iwl4965_scan_cancel_timeout(priv, 200);
6024
6025 conf = ieee80211_get_hw_conf(priv->hw);
6026
6027 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6028 iwl4965_commit_rxon(priv);
6029
6030 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6031 iwl4965_setup_rxon_timing(priv);
6032 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6033 sizeof(priv->rxon_timing), &priv->rxon_timing);
6034 if (ret)
6035 IWL_WARNING("REPLY_RXON_TIMING failed - "
6036 "Attempting to continue.\n");
6037
6038 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6039
6040 #ifdef CONFIG_IWL4965_HT
6041 if (priv->current_ht_config.is_ht)
6042 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6043 #endif /* CONFIG_IWL4965_HT*/
6044 iwl4965_set_rxon_chain(priv);
6045 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6046
6047 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6048 priv->assoc_id, priv->beacon_int);
6049
6050 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6051 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6052 else
6053 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6054
6055 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6056 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6057 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6058 else
6059 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6060
6061 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6062 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6063
6064 }
6065
6066 iwl4965_commit_rxon(priv);
6067
6068 switch (priv->iw_mode) {
6069 case IEEE80211_IF_TYPE_STA:
6070 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6071 break;
6072
6073 case IEEE80211_IF_TYPE_IBSS:
6074
6075 /* clear out the station table */
6076 iwlcore_clear_stations_table(priv);
6077
6078 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6079 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6080 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6081 iwl4965_send_beacon_cmd(priv);
6082
6083 break;
6084
6085 default:
6086 IWL_ERROR("%s Should not be called in %d mode\n",
6087 __FUNCTION__, priv->iw_mode);
6088 break;
6089 }
6090
6091 iwl4965_sequence_reset(priv);
6092
6093 #ifdef CONFIG_IWL4965_SENSITIVITY
6094 /* Enable Rx differential gain and sensitivity calibrations */
6095 iwl4965_chain_noise_reset(priv);
6096 priv->start_calib = 1;
6097 #endif /* CONFIG_IWL4965_SENSITIVITY */
6098
6099 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6100 priv->assoc_station_added = 1;
6101
6102 iwl4965_activate_qos(priv, 0);
6103
6104 /* we have just associated, don't start scan too early */
6105 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6106 }
6107
6108
6109 static void iwl4965_bg_post_associate(struct work_struct *data)
6110 {
6111 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6112 post_associate.work);
6113
6114 mutex_lock(&priv->mutex);
6115 iwl4965_post_associate(priv);
6116 mutex_unlock(&priv->mutex);
6117
6118 }
6119
6120 static void iwl4965_bg_abort_scan(struct work_struct *work)
6121 {
6122 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6123
6124 if (!iwl_is_ready(priv))
6125 return;
6126
6127 mutex_lock(&priv->mutex);
6128
6129 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6130 iwl4965_send_scan_abort(priv);
6131
6132 mutex_unlock(&priv->mutex);
6133 }
6134
6135 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6136
6137 static void iwl4965_bg_scan_completed(struct work_struct *work)
6138 {
6139 struct iwl_priv *priv =
6140 container_of(work, struct iwl_priv, scan_completed);
6141
6142 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6143
6144 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6145 return;
6146
6147 if (test_bit(STATUS_CONF_PENDING, &priv->status))
6148 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6149
6150 ieee80211_scan_completed(priv->hw);
6151
6152 /* Since setting the TXPOWER may have been deferred while
6153 * performing the scan, fire one off */
6154 mutex_lock(&priv->mutex);
6155 iwl4965_hw_reg_send_txpower(priv);
6156 mutex_unlock(&priv->mutex);
6157 }
6158
6159 /*****************************************************************************
6160 *
6161 * mac80211 entry point functions
6162 *
6163 *****************************************************************************/
6164
6165 #define UCODE_READY_TIMEOUT (2 * HZ)
6166
6167 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6168 {
6169 struct iwl_priv *priv = hw->priv;
6170 int ret;
6171
6172 IWL_DEBUG_MAC80211("enter\n");
6173
6174 if (pci_enable_device(priv->pci_dev)) {
6175 IWL_ERROR("Fail to pci_enable_device\n");
6176 return -ENODEV;
6177 }
6178 pci_restore_state(priv->pci_dev);
6179 pci_enable_msi(priv->pci_dev);
6180
6181 ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6182 DRV_NAME, priv);
6183 if (ret) {
6184 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6185 goto out_disable_msi;
6186 }
6187
6188 /* we should be verifying the device is ready to be opened */
6189 mutex_lock(&priv->mutex);
6190
6191 memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6192 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6193 * ucode filename and max sizes are card-specific. */
6194
6195 if (!priv->ucode_code.len) {
6196 ret = iwl4965_read_ucode(priv);
6197 if (ret) {
6198 IWL_ERROR("Could not read microcode: %d\n", ret);
6199 mutex_unlock(&priv->mutex);
6200 goto out_release_irq;
6201 }
6202 }
6203
6204 ret = __iwl4965_up(priv);
6205
6206 mutex_unlock(&priv->mutex);
6207
6208 if (ret)
6209 goto out_release_irq;
6210
6211 IWL_DEBUG_INFO("Start UP work done.\n");
6212
6213 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6214 return 0;
6215
6216 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6217 * mac80211 will not be run successfully. */
6218 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6219 test_bit(STATUS_READY, &priv->status),
6220 UCODE_READY_TIMEOUT);
6221 if (!ret) {
6222 if (!test_bit(STATUS_READY, &priv->status)) {
6223 IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6224 jiffies_to_msecs(UCODE_READY_TIMEOUT));
6225 ret = -ETIMEDOUT;
6226 goto out_release_irq;
6227 }
6228 }
6229
6230 priv->is_open = 1;
6231 IWL_DEBUG_MAC80211("leave\n");
6232 return 0;
6233
6234 out_release_irq:
6235 free_irq(priv->pci_dev->irq, priv);
6236 out_disable_msi:
6237 pci_disable_msi(priv->pci_dev);
6238 pci_disable_device(priv->pci_dev);
6239 priv->is_open = 0;
6240 IWL_DEBUG_MAC80211("leave - failed\n");
6241 return ret;
6242 }
6243
6244 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6245 {
6246 struct iwl_priv *priv = hw->priv;
6247
6248 IWL_DEBUG_MAC80211("enter\n");
6249
6250 if (!priv->is_open) {
6251 IWL_DEBUG_MAC80211("leave - skip\n");
6252 return;
6253 }
6254
6255 priv->is_open = 0;
6256
6257 if (iwl_is_ready_rf(priv)) {
6258 /* stop mac, cancel any scan request and clear
6259 * RXON_FILTER_ASSOC_MSK BIT
6260 */
6261 mutex_lock(&priv->mutex);
6262 iwl4965_scan_cancel_timeout(priv, 100);
6263 cancel_delayed_work(&priv->post_associate);
6264 mutex_unlock(&priv->mutex);
6265 }
6266
6267 iwl4965_down(priv);
6268
6269 flush_workqueue(priv->workqueue);
6270 free_irq(priv->pci_dev->irq, priv);
6271 pci_disable_msi(priv->pci_dev);
6272 pci_save_state(priv->pci_dev);
6273 pci_disable_device(priv->pci_dev);
6274
6275 IWL_DEBUG_MAC80211("leave\n");
6276 }
6277
6278 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6279 struct ieee80211_tx_control *ctl)
6280 {
6281 struct iwl_priv *priv = hw->priv;
6282
6283 IWL_DEBUG_MAC80211("enter\n");
6284
6285 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6286 IWL_DEBUG_MAC80211("leave - monitor\n");
6287 return -1;
6288 }
6289
6290 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6291 ctl->tx_rate->bitrate);
6292
6293 if (iwl4965_tx_skb(priv, skb, ctl))
6294 dev_kfree_skb_any(skb);
6295
6296 IWL_DEBUG_MAC80211("leave\n");
6297 return 0;
6298 }
6299
6300 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6301 struct ieee80211_if_init_conf *conf)
6302 {
6303 struct iwl_priv *priv = hw->priv;
6304 unsigned long flags;
6305 DECLARE_MAC_BUF(mac);
6306
6307 IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6308
6309 if (priv->vif) {
6310 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6311 return -EOPNOTSUPP;
6312 }
6313
6314 spin_lock_irqsave(&priv->lock, flags);
6315 priv->vif = conf->vif;
6316
6317 spin_unlock_irqrestore(&priv->lock, flags);
6318
6319 mutex_lock(&priv->mutex);
6320
6321 if (conf->mac_addr) {
6322 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6323 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6324 }
6325
6326 if (iwl_is_ready(priv))
6327 iwl4965_set_mode(priv, conf->type);
6328
6329 mutex_unlock(&priv->mutex);
6330
6331 IWL_DEBUG_MAC80211("leave\n");
6332 return 0;
6333 }
6334
6335 /**
6336 * iwl4965_mac_config - mac80211 config callback
6337 *
6338 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6339 * be set inappropriately and the driver currently sets the hardware up to
6340 * use it whenever needed.
6341 */
6342 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6343 {
6344 struct iwl_priv *priv = hw->priv;
6345 const struct iwl_channel_info *ch_info;
6346 unsigned long flags;
6347 int ret = 0;
6348
6349 mutex_lock(&priv->mutex);
6350 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6351
6352 priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6353
6354 if (!iwl_is_ready(priv)) {
6355 IWL_DEBUG_MAC80211("leave - not ready\n");
6356 ret = -EIO;
6357 goto out;
6358 }
6359
6360 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6361 test_bit(STATUS_SCANNING, &priv->status))) {
6362 IWL_DEBUG_MAC80211("leave - scanning\n");
6363 set_bit(STATUS_CONF_PENDING, &priv->status);
6364 mutex_unlock(&priv->mutex);
6365 return 0;
6366 }
6367
6368 spin_lock_irqsave(&priv->lock, flags);
6369
6370 ch_info = iwl_get_channel_info(priv, conf->channel->band,
6371 ieee80211_frequency_to_channel(conf->channel->center_freq));
6372 if (!is_channel_valid(ch_info)) {
6373 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6374 spin_unlock_irqrestore(&priv->lock, flags);
6375 ret = -EINVAL;
6376 goto out;
6377 }
6378
6379 #ifdef CONFIG_IWL4965_HT
6380 /* if we are switching from ht to 2.4 clear flags
6381 * from any ht related info since 2.4 does not
6382 * support ht */
6383 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6384 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6385 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6386 #endif
6387 )
6388 priv->staging_rxon.flags = 0;
6389 #endif /* CONFIG_IWL4965_HT */
6390
6391 iwlcore_set_rxon_channel(priv, conf->channel->band,
6392 ieee80211_frequency_to_channel(conf->channel->center_freq));
6393
6394 iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6395
6396 /* The list of supported rates and rate mask can be different
6397 * for each band; since the band may have changed, reset
6398 * the rate mask to what mac80211 lists */
6399 iwl4965_set_rate(priv);
6400
6401 spin_unlock_irqrestore(&priv->lock, flags);
6402
6403 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6404 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6405 iwl4965_hw_channel_switch(priv, conf->channel);
6406 goto out;
6407 }
6408 #endif
6409
6410 if (priv->cfg->ops->lib->radio_kill_sw)
6411 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6412
6413 if (!conf->radio_enabled) {
6414 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6415 goto out;
6416 }
6417
6418 if (iwl_is_rfkill(priv)) {
6419 IWL_DEBUG_MAC80211("leave - RF kill\n");
6420 ret = -EIO;
6421 goto out;
6422 }
6423
6424 iwl4965_set_rate(priv);
6425
6426 if (memcmp(&priv->active_rxon,
6427 &priv->staging_rxon, sizeof(priv->staging_rxon)))
6428 iwl4965_commit_rxon(priv);
6429 else
6430 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6431
6432 IWL_DEBUG_MAC80211("leave\n");
6433
6434 out:
6435 clear_bit(STATUS_CONF_PENDING, &priv->status);
6436 mutex_unlock(&priv->mutex);
6437 return ret;
6438 }
6439
6440 static void iwl4965_config_ap(struct iwl_priv *priv)
6441 {
6442 int ret = 0;
6443
6444 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6445 return;
6446
6447 /* The following should be done only at AP bring up */
6448 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6449
6450 /* RXON - unassoc (to set timing command) */
6451 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6452 iwl4965_commit_rxon(priv);
6453
6454 /* RXON Timing */
6455 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6456 iwl4965_setup_rxon_timing(priv);
6457 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6458 sizeof(priv->rxon_timing), &priv->rxon_timing);
6459 if (ret)
6460 IWL_WARNING("REPLY_RXON_TIMING failed - "
6461 "Attempting to continue.\n");
6462
6463 iwl4965_set_rxon_chain(priv);
6464
6465 /* FIXME: what should be the assoc_id for AP? */
6466 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6467 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6468 priv->staging_rxon.flags |=
6469 RXON_FLG_SHORT_PREAMBLE_MSK;
6470 else
6471 priv->staging_rxon.flags &=
6472 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6473
6474 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6475 if (priv->assoc_capability &
6476 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6477 priv->staging_rxon.flags |=
6478 RXON_FLG_SHORT_SLOT_MSK;
6479 else
6480 priv->staging_rxon.flags &=
6481 ~RXON_FLG_SHORT_SLOT_MSK;
6482
6483 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6484 priv->staging_rxon.flags &=
6485 ~RXON_FLG_SHORT_SLOT_MSK;
6486 }
6487 /* restore RXON assoc */
6488 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6489 iwl4965_commit_rxon(priv);
6490 iwl4965_activate_qos(priv, 1);
6491 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6492 }
6493 iwl4965_send_beacon_cmd(priv);
6494
6495 /* FIXME - we need to add code here to detect a totally new
6496 * configuration, reset the AP, unassoc, rxon timing, assoc,
6497 * clear sta table, add BCAST sta... */
6498 }
6499
6500 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6501 struct ieee80211_vif *vif,
6502 struct ieee80211_if_conf *conf)
6503 {
6504 struct iwl_priv *priv = hw->priv;
6505 DECLARE_MAC_BUF(mac);
6506 unsigned long flags;
6507 int rc;
6508
6509 if (conf == NULL)
6510 return -EIO;
6511
6512 if (priv->vif != vif) {
6513 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6514 mutex_unlock(&priv->mutex);
6515 return 0;
6516 }
6517
6518 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6519 (!conf->beacon || !conf->ssid_len)) {
6520 IWL_DEBUG_MAC80211
6521 ("Leaving in AP mode because HostAPD is not ready.\n");
6522 return 0;
6523 }
6524
6525 if (!iwl_is_alive(priv))
6526 return -EAGAIN;
6527
6528 mutex_lock(&priv->mutex);
6529
6530 if (conf->bssid)
6531 IWL_DEBUG_MAC80211("bssid: %s\n",
6532 print_mac(mac, conf->bssid));
6533
6534 /*
6535 * very dubious code was here; the probe filtering flag is never set:
6536 *
6537 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6538 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6539 */
6540
6541 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6542 if (!conf->bssid) {
6543 conf->bssid = priv->mac_addr;
6544 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6545 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6546 print_mac(mac, conf->bssid));
6547 }
6548 if (priv->ibss_beacon)
6549 dev_kfree_skb(priv->ibss_beacon);
6550
6551 priv->ibss_beacon = conf->beacon;
6552 }
6553
6554 if (iwl_is_rfkill(priv))
6555 goto done;
6556
6557 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6558 !is_multicast_ether_addr(conf->bssid)) {
6559 /* If there is currently a HW scan going on in the background
6560 * then we need to cancel it else the RXON below will fail. */
6561 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6562 IWL_WARNING("Aborted scan still in progress "
6563 "after 100ms\n");
6564 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6565 mutex_unlock(&priv->mutex);
6566 return -EAGAIN;
6567 }
6568 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6569
6570 /* TODO: Audit driver for usage of these members and see
6571 * if mac80211 deprecates them (priv->bssid looks like it
6572 * shouldn't be there, but I haven't scanned the IBSS code
6573 * to verify) - jpk */
6574 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6575
6576 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6577 iwl4965_config_ap(priv);
6578 else {
6579 rc = iwl4965_commit_rxon(priv);
6580 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6581 iwl4965_rxon_add_station(
6582 priv, priv->active_rxon.bssid_addr, 1);
6583 }
6584
6585 } else {
6586 iwl4965_scan_cancel_timeout(priv, 100);
6587 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6588 iwl4965_commit_rxon(priv);
6589 }
6590
6591 done:
6592 spin_lock_irqsave(&priv->lock, flags);
6593 if (!conf->ssid_len)
6594 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6595 else
6596 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6597
6598 priv->essid_len = conf->ssid_len;
6599 spin_unlock_irqrestore(&priv->lock, flags);
6600
6601 IWL_DEBUG_MAC80211("leave\n");
6602 mutex_unlock(&priv->mutex);
6603
6604 return 0;
6605 }
6606
6607 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6608 unsigned int changed_flags,
6609 unsigned int *total_flags,
6610 int mc_count, struct dev_addr_list *mc_list)
6611 {
6612 /*
6613 * XXX: dummy
6614 * see also iwl4965_connection_init_rx_config
6615 */
6616 *total_flags = 0;
6617 }
6618
6619 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6620 struct ieee80211_if_init_conf *conf)
6621 {
6622 struct iwl_priv *priv = hw->priv;
6623
6624 IWL_DEBUG_MAC80211("enter\n");
6625
6626 mutex_lock(&priv->mutex);
6627
6628 if (iwl_is_ready_rf(priv)) {
6629 iwl4965_scan_cancel_timeout(priv, 100);
6630 cancel_delayed_work(&priv->post_associate);
6631 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6632 iwl4965_commit_rxon(priv);
6633 }
6634 if (priv->vif == conf->vif) {
6635 priv->vif = NULL;
6636 memset(priv->bssid, 0, ETH_ALEN);
6637 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6638 priv->essid_len = 0;
6639 }
6640 mutex_unlock(&priv->mutex);
6641
6642 IWL_DEBUG_MAC80211("leave\n");
6643
6644 }
6645
6646
6647 #ifdef CONFIG_IWL4965_HT
6648 static void iwl4965_ht_conf(struct iwl_priv *priv,
6649 struct ieee80211_bss_conf *bss_conf)
6650 {
6651 struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6652 struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6653 struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6654
6655 IWL_DEBUG_MAC80211("enter: \n");
6656
6657 iwl_conf->is_ht = bss_conf->assoc_ht;
6658
6659 if (!iwl_conf->is_ht)
6660 return;
6661
6662 priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6663
6664 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6665 iwl_conf->sgf |= 0x1;
6666 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6667 iwl_conf->sgf |= 0x2;
6668
6669 iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6670 iwl_conf->max_amsdu_size =
6671 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6672
6673 iwl_conf->supported_chan_width =
6674 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6675 iwl_conf->extension_chan_offset =
6676 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6677 /* If no above or below channel supplied disable FAT channel */
6678 if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6679 iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6680 iwl_conf->supported_chan_width = 0;
6681
6682 iwl_conf->tx_mimo_ps_mode =
6683 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6684 memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6685
6686 iwl_conf->control_channel = ht_bss_conf->primary_channel;
6687 iwl_conf->tx_chan_width =
6688 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6689 iwl_conf->ht_protection =
6690 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6691 iwl_conf->non_GF_STA_present =
6692 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6693
6694 IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6695 IWL_DEBUG_MAC80211("leave\n");
6696 }
6697 #else
6698 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6699 struct ieee80211_bss_conf *bss_conf)
6700 {
6701 }
6702 #endif
6703
6704 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6705 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6706 struct ieee80211_vif *vif,
6707 struct ieee80211_bss_conf *bss_conf,
6708 u32 changes)
6709 {
6710 struct iwl_priv *priv = hw->priv;
6711
6712 IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6713
6714 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6715 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6716 bss_conf->use_short_preamble);
6717 if (bss_conf->use_short_preamble)
6718 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6719 else
6720 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6721 }
6722
6723 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6724 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6725 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6726 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6727 else
6728 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6729 }
6730
6731 if (changes & BSS_CHANGED_HT) {
6732 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6733 iwl4965_ht_conf(priv, bss_conf);
6734 iwl4965_set_rxon_chain(priv);
6735 }
6736
6737 if (changes & BSS_CHANGED_ASSOC) {
6738 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6739 /* This should never happen as this function should
6740 * never be called from interrupt context. */
6741 if (WARN_ON_ONCE(in_interrupt()))
6742 return;
6743 if (bss_conf->assoc) {
6744 priv->assoc_id = bss_conf->aid;
6745 priv->beacon_int = bss_conf->beacon_int;
6746 priv->timestamp = bss_conf->timestamp;
6747 priv->assoc_capability = bss_conf->assoc_capability;
6748 priv->next_scan_jiffies = jiffies +
6749 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6750 mutex_lock(&priv->mutex);
6751 iwl4965_post_associate(priv);
6752 mutex_unlock(&priv->mutex);
6753 } else {
6754 priv->assoc_id = 0;
6755 IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6756 }
6757 } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6758 IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6759 iwl4965_send_rxon_assoc(priv);
6760 }
6761
6762 }
6763
6764 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6765 {
6766 int rc = 0;
6767 unsigned long flags;
6768 struct iwl_priv *priv = hw->priv;
6769
6770 IWL_DEBUG_MAC80211("enter\n");
6771
6772 mutex_lock(&priv->mutex);
6773 spin_lock_irqsave(&priv->lock, flags);
6774
6775 if (!iwl_is_ready_rf(priv)) {
6776 rc = -EIO;
6777 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6778 goto out_unlock;
6779 }
6780
6781 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
6782 rc = -EIO;
6783 IWL_ERROR("ERROR: APs don't scan\n");
6784 goto out_unlock;
6785 }
6786
6787 /* we don't schedule scan within next_scan_jiffies period */
6788 if (priv->next_scan_jiffies &&
6789 time_after(priv->next_scan_jiffies, jiffies)) {
6790 rc = -EAGAIN;
6791 goto out_unlock;
6792 }
6793 /* if we just finished scan ask for delay */
6794 if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6795 IWL_DELAY_NEXT_SCAN, jiffies)) {
6796 rc = -EAGAIN;
6797 goto out_unlock;
6798 }
6799 if (len) {
6800 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6801 iwl4965_escape_essid(ssid, len), (int)len);
6802
6803 priv->one_direct_scan = 1;
6804 priv->direct_ssid_len = (u8)
6805 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6806 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6807 } else
6808 priv->one_direct_scan = 0;
6809
6810 rc = iwl4965_scan_initiate(priv);
6811
6812 IWL_DEBUG_MAC80211("leave\n");
6813
6814 out_unlock:
6815 spin_unlock_irqrestore(&priv->lock, flags);
6816 mutex_unlock(&priv->mutex);
6817
6818 return rc;
6819 }
6820
6821 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6822 struct ieee80211_key_conf *keyconf, const u8 *addr,
6823 u32 iv32, u16 *phase1key)
6824 {
6825 struct iwl_priv *priv = hw->priv;
6826 u8 sta_id = IWL_INVALID_STATION;
6827 unsigned long flags;
6828 __le16 key_flags = 0;
6829 int i;
6830 DECLARE_MAC_BUF(mac);
6831
6832 IWL_DEBUG_MAC80211("enter\n");
6833
6834 sta_id = iwl4965_hw_find_station(priv, addr);
6835 if (sta_id == IWL_INVALID_STATION) {
6836 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6837 print_mac(mac, addr));
6838 return;
6839 }
6840
6841 iwl4965_scan_cancel_timeout(priv, 100);
6842
6843 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6844 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6845 key_flags &= ~STA_KEY_FLG_INVALID;
6846
6847 if (sta_id == priv->hw_params.bcast_sta_id)
6848 key_flags |= STA_KEY_MULTICAST_MSK;
6849
6850 spin_lock_irqsave(&priv->sta_lock, flags);
6851
6852 priv->stations[sta_id].sta.key.key_offset =
6853 iwl_get_free_ucode_key_index(priv);
6854 priv->stations[sta_id].sta.key.key_flags = key_flags;
6855 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6856
6857 for (i = 0; i < 5; i++)
6858 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6859 cpu_to_le16(phase1key[i]);
6860
6861 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6862 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6863
6864 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6865
6866 spin_unlock_irqrestore(&priv->sta_lock, flags);
6867
6868 IWL_DEBUG_MAC80211("leave\n");
6869 }
6870
6871 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6872 const u8 *local_addr, const u8 *addr,
6873 struct ieee80211_key_conf *key)
6874 {
6875 struct iwl_priv *priv = hw->priv;
6876 DECLARE_MAC_BUF(mac);
6877 int ret = 0;
6878 u8 sta_id = IWL_INVALID_STATION;
6879 u8 is_default_wep_key = 0;
6880
6881 IWL_DEBUG_MAC80211("enter\n");
6882
6883 if (!priv->cfg->mod_params->hw_crypto) {
6884 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6885 return -EOPNOTSUPP;
6886 }
6887
6888 if (is_zero_ether_addr(addr))
6889 /* only support pairwise keys */
6890 return -EOPNOTSUPP;
6891
6892 sta_id = iwl4965_hw_find_station(priv, addr);
6893 if (sta_id == IWL_INVALID_STATION) {
6894 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6895 print_mac(mac, addr));
6896 return -EINVAL;
6897
6898 }
6899
6900 mutex_lock(&priv->mutex);
6901 iwl4965_scan_cancel_timeout(priv, 100);
6902 mutex_unlock(&priv->mutex);
6903
6904 /* If we are getting WEP group key and we didn't receive any key mapping
6905 * so far, we are in legacy wep mode (group key only), otherwise we are
6906 * in 1X mode.
6907 * In legacy wep mode, we use another host command to the uCode */
6908 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6909 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6910 if (cmd == SET_KEY)
6911 is_default_wep_key = !priv->key_mapping_key;
6912 else
6913 is_default_wep_key = priv->default_wep_key;
6914 }
6915
6916 switch (cmd) {
6917 case SET_KEY:
6918 if (is_default_wep_key)
6919 ret = iwl_set_default_wep_key(priv, key);
6920 else
6921 ret = iwl_set_dynamic_key(priv, key, sta_id);
6922
6923 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6924 break;
6925 case DISABLE_KEY:
6926 if (is_default_wep_key)
6927 ret = iwl_remove_default_wep_key(priv, key);
6928 else
6929 ret = iwl_remove_dynamic_key(priv, sta_id);
6930
6931 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6932 break;
6933 default:
6934 ret = -EINVAL;
6935 }
6936
6937 IWL_DEBUG_MAC80211("leave\n");
6938
6939 return ret;
6940 }
6941
6942 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6943 const struct ieee80211_tx_queue_params *params)
6944 {
6945 struct iwl_priv *priv = hw->priv;
6946 unsigned long flags;
6947 int q;
6948
6949 IWL_DEBUG_MAC80211("enter\n");
6950
6951 if (!iwl_is_ready_rf(priv)) {
6952 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6953 return -EIO;
6954 }
6955
6956 if (queue >= AC_NUM) {
6957 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6958 return 0;
6959 }
6960
6961 if (!priv->qos_data.qos_enable) {
6962 priv->qos_data.qos_active = 0;
6963 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6964 return 0;
6965 }
6966 q = AC_NUM - 1 - queue;
6967
6968 spin_lock_irqsave(&priv->lock, flags);
6969
6970 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6971 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6972 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6973 priv->qos_data.def_qos_parm.ac[q].edca_txop =
6974 cpu_to_le16((params->txop * 32));
6975
6976 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6977 priv->qos_data.qos_active = 1;
6978
6979 spin_unlock_irqrestore(&priv->lock, flags);
6980
6981 mutex_lock(&priv->mutex);
6982 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6983 iwl4965_activate_qos(priv, 1);
6984 else if (priv->assoc_id && iwl_is_associated(priv))
6985 iwl4965_activate_qos(priv, 0);
6986
6987 mutex_unlock(&priv->mutex);
6988
6989 IWL_DEBUG_MAC80211("leave\n");
6990 return 0;
6991 }
6992
6993 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6994 struct ieee80211_tx_queue_stats *stats)
6995 {
6996 struct iwl_priv *priv = hw->priv;
6997 int i, avail;
6998 struct iwl4965_tx_queue *txq;
6999 struct iwl4965_queue *q;
7000 unsigned long flags;
7001
7002 IWL_DEBUG_MAC80211("enter\n");
7003
7004 if (!iwl_is_ready_rf(priv)) {
7005 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7006 return -EIO;
7007 }
7008
7009 spin_lock_irqsave(&priv->lock, flags);
7010
7011 for (i = 0; i < AC_NUM; i++) {
7012 txq = &priv->txq[i];
7013 q = &txq->q;
7014 avail = iwl4965_queue_space(q);
7015
7016 stats->data[i].len = q->n_window - avail;
7017 stats->data[i].limit = q->n_window - q->high_mark;
7018 stats->data[i].count = q->n_window;
7019
7020 }
7021 spin_unlock_irqrestore(&priv->lock, flags);
7022
7023 IWL_DEBUG_MAC80211("leave\n");
7024
7025 return 0;
7026 }
7027
7028 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7029 struct ieee80211_low_level_stats *stats)
7030 {
7031 IWL_DEBUG_MAC80211("enter\n");
7032 IWL_DEBUG_MAC80211("leave\n");
7033
7034 return 0;
7035 }
7036
7037 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7038 {
7039 IWL_DEBUG_MAC80211("enter\n");
7040 IWL_DEBUG_MAC80211("leave\n");
7041
7042 return 0;
7043 }
7044
7045 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7046 {
7047 struct iwl_priv *priv = hw->priv;
7048 unsigned long flags;
7049
7050 mutex_lock(&priv->mutex);
7051 IWL_DEBUG_MAC80211("enter\n");
7052
7053 priv->lq_mngr.lq_ready = 0;
7054 #ifdef CONFIG_IWL4965_HT
7055 spin_lock_irqsave(&priv->lock, flags);
7056 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7057 spin_unlock_irqrestore(&priv->lock, flags);
7058 #endif /* CONFIG_IWL4965_HT */
7059
7060 iwlcore_reset_qos(priv);
7061
7062 cancel_delayed_work(&priv->post_associate);
7063
7064 spin_lock_irqsave(&priv->lock, flags);
7065 priv->assoc_id = 0;
7066 priv->assoc_capability = 0;
7067 priv->assoc_station_added = 0;
7068
7069 /* new association get rid of ibss beacon skb */
7070 if (priv->ibss_beacon)
7071 dev_kfree_skb(priv->ibss_beacon);
7072
7073 priv->ibss_beacon = NULL;
7074
7075 priv->beacon_int = priv->hw->conf.beacon_int;
7076 priv->timestamp = 0;
7077 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7078 priv->beacon_int = 0;
7079
7080 spin_unlock_irqrestore(&priv->lock, flags);
7081
7082 if (!iwl_is_ready_rf(priv)) {
7083 IWL_DEBUG_MAC80211("leave - not ready\n");
7084 mutex_unlock(&priv->mutex);
7085 return;
7086 }
7087
7088 /* we are restarting association process
7089 * clear RXON_FILTER_ASSOC_MSK bit
7090 */
7091 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7092 iwl4965_scan_cancel_timeout(priv, 100);
7093 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7094 iwl4965_commit_rxon(priv);
7095 }
7096
7097 /* Per mac80211.h: This is only used in IBSS mode... */
7098 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7099
7100 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7101 mutex_unlock(&priv->mutex);
7102 return;
7103 }
7104
7105 priv->only_active_channel = 0;
7106
7107 iwl4965_set_rate(priv);
7108
7109 mutex_unlock(&priv->mutex);
7110
7111 IWL_DEBUG_MAC80211("leave\n");
7112 }
7113
7114 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7115 struct ieee80211_tx_control *control)
7116 {
7117 struct iwl_priv *priv = hw->priv;
7118 unsigned long flags;
7119
7120 mutex_lock(&priv->mutex);
7121 IWL_DEBUG_MAC80211("enter\n");
7122
7123 if (!iwl_is_ready_rf(priv)) {
7124 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7125 mutex_unlock(&priv->mutex);
7126 return -EIO;
7127 }
7128
7129 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7130 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7131 mutex_unlock(&priv->mutex);
7132 return -EIO;
7133 }
7134
7135 spin_lock_irqsave(&priv->lock, flags);
7136
7137 if (priv->ibss_beacon)
7138 dev_kfree_skb(priv->ibss_beacon);
7139
7140 priv->ibss_beacon = skb;
7141
7142 priv->assoc_id = 0;
7143
7144 IWL_DEBUG_MAC80211("leave\n");
7145 spin_unlock_irqrestore(&priv->lock, flags);
7146
7147 iwlcore_reset_qos(priv);
7148
7149 queue_work(priv->workqueue, &priv->post_associate.work);
7150
7151 mutex_unlock(&priv->mutex);
7152
7153 return 0;
7154 }
7155
7156 /*****************************************************************************
7157 *
7158 * sysfs attributes
7159 *
7160 *****************************************************************************/
7161
7162 #ifdef CONFIG_IWLWIFI_DEBUG
7163
7164 /*
7165 * The following adds a new attribute to the sysfs representation
7166 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7167 * used for controlling the debug level.
7168 *
7169 * See the level definitions in iwl for details.
7170 */
7171
7172 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7173 {
7174 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7175 }
7176 static ssize_t store_debug_level(struct device_driver *d,
7177 const char *buf, size_t count)
7178 {
7179 char *p = (char *)buf;
7180 u32 val;
7181
7182 val = simple_strtoul(p, &p, 0);
7183 if (p == buf)
7184 printk(KERN_INFO DRV_NAME
7185 ": %s is not in hex or decimal form.\n", buf);
7186 else
7187 iwl_debug_level = val;
7188
7189 return strnlen(buf, count);
7190 }
7191
7192 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7193 show_debug_level, store_debug_level);
7194
7195 #endif /* CONFIG_IWLWIFI_DEBUG */
7196
7197
7198 static ssize_t show_temperature(struct device *d,
7199 struct device_attribute *attr, char *buf)
7200 {
7201 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7202
7203 if (!iwl_is_alive(priv))
7204 return -EAGAIN;
7205
7206 return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7207 }
7208
7209 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7210
7211 static ssize_t show_rs_window(struct device *d,
7212 struct device_attribute *attr,
7213 char *buf)
7214 {
7215 struct iwl_priv *priv = d->driver_data;
7216 return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7217 }
7218 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7219
7220 static ssize_t show_tx_power(struct device *d,
7221 struct device_attribute *attr, char *buf)
7222 {
7223 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7224 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7225 }
7226
7227 static ssize_t store_tx_power(struct device *d,
7228 struct device_attribute *attr,
7229 const char *buf, size_t count)
7230 {
7231 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7232 char *p = (char *)buf;
7233 u32 val;
7234
7235 val = simple_strtoul(p, &p, 10);
7236 if (p == buf)
7237 printk(KERN_INFO DRV_NAME
7238 ": %s is not in decimal form.\n", buf);
7239 else
7240 iwl4965_hw_reg_set_txpower(priv, val);
7241
7242 return count;
7243 }
7244
7245 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7246
7247 static ssize_t show_flags(struct device *d,
7248 struct device_attribute *attr, char *buf)
7249 {
7250 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7251
7252 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7253 }
7254
7255 static ssize_t store_flags(struct device *d,
7256 struct device_attribute *attr,
7257 const char *buf, size_t count)
7258 {
7259 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7260 u32 flags = simple_strtoul(buf, NULL, 0);
7261
7262 mutex_lock(&priv->mutex);
7263 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7264 /* Cancel any currently running scans... */
7265 if (iwl4965_scan_cancel_timeout(priv, 100))
7266 IWL_WARNING("Could not cancel scan.\n");
7267 else {
7268 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7269 flags);
7270 priv->staging_rxon.flags = cpu_to_le32(flags);
7271 iwl4965_commit_rxon(priv);
7272 }
7273 }
7274 mutex_unlock(&priv->mutex);
7275
7276 return count;
7277 }
7278
7279 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7280
7281 static ssize_t show_filter_flags(struct device *d,
7282 struct device_attribute *attr, char *buf)
7283 {
7284 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7285
7286 return sprintf(buf, "0x%04X\n",
7287 le32_to_cpu(priv->active_rxon.filter_flags));
7288 }
7289
7290 static ssize_t store_filter_flags(struct device *d,
7291 struct device_attribute *attr,
7292 const char *buf, size_t count)
7293 {
7294 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7295 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7296
7297 mutex_lock(&priv->mutex);
7298 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7299 /* Cancel any currently running scans... */
7300 if (iwl4965_scan_cancel_timeout(priv, 100))
7301 IWL_WARNING("Could not cancel scan.\n");
7302 else {
7303 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7304 "0x%04X\n", filter_flags);
7305 priv->staging_rxon.filter_flags =
7306 cpu_to_le32(filter_flags);
7307 iwl4965_commit_rxon(priv);
7308 }
7309 }
7310 mutex_unlock(&priv->mutex);
7311
7312 return count;
7313 }
7314
7315 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7316 store_filter_flags);
7317
7318 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7319
7320 static ssize_t show_measurement(struct device *d,
7321 struct device_attribute *attr, char *buf)
7322 {
7323 struct iwl_priv *priv = dev_get_drvdata(d);
7324 struct iwl4965_spectrum_notification measure_report;
7325 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7326 u8 *data = (u8 *) & measure_report;
7327 unsigned long flags;
7328
7329 spin_lock_irqsave(&priv->lock, flags);
7330 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7331 spin_unlock_irqrestore(&priv->lock, flags);
7332 return 0;
7333 }
7334 memcpy(&measure_report, &priv->measure_report, size);
7335 priv->measurement_status = 0;
7336 spin_unlock_irqrestore(&priv->lock, flags);
7337
7338 while (size && (PAGE_SIZE - len)) {
7339 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7340 PAGE_SIZE - len, 1);
7341 len = strlen(buf);
7342 if (PAGE_SIZE - len)
7343 buf[len++] = '\n';
7344
7345 ofs += 16;
7346 size -= min(size, 16U);
7347 }
7348
7349 return len;
7350 }
7351
7352 static ssize_t store_measurement(struct device *d,
7353 struct device_attribute *attr,
7354 const char *buf, size_t count)
7355 {
7356 struct iwl_priv *priv = dev_get_drvdata(d);
7357 struct ieee80211_measurement_params params = {
7358 .channel = le16_to_cpu(priv->active_rxon.channel),
7359 .start_time = cpu_to_le64(priv->last_tsf),
7360 .duration = cpu_to_le16(1),
7361 };
7362 u8 type = IWL_MEASURE_BASIC;
7363 u8 buffer[32];
7364 u8 channel;
7365
7366 if (count) {
7367 char *p = buffer;
7368 strncpy(buffer, buf, min(sizeof(buffer), count));
7369 channel = simple_strtoul(p, NULL, 0);
7370 if (channel)
7371 params.channel = channel;
7372
7373 p = buffer;
7374 while (*p && *p != ' ')
7375 p++;
7376 if (*p)
7377 type = simple_strtoul(p + 1, NULL, 0);
7378 }
7379
7380 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7381 "channel %d (for '%s')\n", type, params.channel, buf);
7382 iwl4965_get_measurement(priv, &params, type);
7383
7384 return count;
7385 }
7386
7387 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7388 show_measurement, store_measurement);
7389 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7390
7391 static ssize_t store_retry_rate(struct device *d,
7392 struct device_attribute *attr,
7393 const char *buf, size_t count)
7394 {
7395 struct iwl_priv *priv = dev_get_drvdata(d);
7396
7397 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7398 if (priv->retry_rate <= 0)
7399 priv->retry_rate = 1;
7400
7401 return count;
7402 }
7403
7404 static ssize_t show_retry_rate(struct device *d,
7405 struct device_attribute *attr, char *buf)
7406 {
7407 struct iwl_priv *priv = dev_get_drvdata(d);
7408 return sprintf(buf, "%d", priv->retry_rate);
7409 }
7410
7411 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7412 store_retry_rate);
7413
7414 static ssize_t store_power_level(struct device *d,
7415 struct device_attribute *attr,
7416 const char *buf, size_t count)
7417 {
7418 struct iwl_priv *priv = dev_get_drvdata(d);
7419 int rc;
7420 int mode;
7421
7422 mode = simple_strtoul(buf, NULL, 0);
7423 mutex_lock(&priv->mutex);
7424
7425 if (!iwl_is_ready(priv)) {
7426 rc = -EAGAIN;
7427 goto out;
7428 }
7429
7430 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7431 mode = IWL_POWER_AC;
7432 else
7433 mode |= IWL_POWER_ENABLED;
7434
7435 if (mode != priv->power_mode) {
7436 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7437 if (rc) {
7438 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7439 goto out;
7440 }
7441 priv->power_mode = mode;
7442 }
7443
7444 rc = count;
7445
7446 out:
7447 mutex_unlock(&priv->mutex);
7448 return rc;
7449 }
7450
7451 #define MAX_WX_STRING 80
7452
7453 /* Values are in microsecond */
7454 static const s32 timeout_duration[] = {
7455 350000,
7456 250000,
7457 75000,
7458 37000,
7459 25000,
7460 };
7461 static const s32 period_duration[] = {
7462 400000,
7463 700000,
7464 1000000,
7465 1000000,
7466 1000000
7467 };
7468
7469 static ssize_t show_power_level(struct device *d,
7470 struct device_attribute *attr, char *buf)
7471 {
7472 struct iwl_priv *priv = dev_get_drvdata(d);
7473 int level = IWL_POWER_LEVEL(priv->power_mode);
7474 char *p = buf;
7475
7476 p += sprintf(p, "%d ", level);
7477 switch (level) {
7478 case IWL_POWER_MODE_CAM:
7479 case IWL_POWER_AC:
7480 p += sprintf(p, "(AC)");
7481 break;
7482 case IWL_POWER_BATTERY:
7483 p += sprintf(p, "(BATTERY)");
7484 break;
7485 default:
7486 p += sprintf(p,
7487 "(Timeout %dms, Period %dms)",
7488 timeout_duration[level - 1] / 1000,
7489 period_duration[level - 1] / 1000);
7490 }
7491
7492 if (!(priv->power_mode & IWL_POWER_ENABLED))
7493 p += sprintf(p, " OFF\n");
7494 else
7495 p += sprintf(p, " \n");
7496
7497 return (p - buf + 1);
7498
7499 }
7500
7501 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7502 store_power_level);
7503
7504 static ssize_t show_channels(struct device *d,
7505 struct device_attribute *attr, char *buf)
7506 {
7507 /* all this shit doesn't belong into sysfs anyway */
7508 return 0;
7509 }
7510
7511 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7512
7513 static ssize_t show_statistics(struct device *d,
7514 struct device_attribute *attr, char *buf)
7515 {
7516 struct iwl_priv *priv = dev_get_drvdata(d);
7517 u32 size = sizeof(struct iwl4965_notif_statistics);
7518 u32 len = 0, ofs = 0;
7519 u8 *data = (u8 *) & priv->statistics;
7520 int rc = 0;
7521
7522 if (!iwl_is_alive(priv))
7523 return -EAGAIN;
7524
7525 mutex_lock(&priv->mutex);
7526 rc = iwl_send_statistics_request(priv, 0);
7527 mutex_unlock(&priv->mutex);
7528
7529 if (rc) {
7530 len = sprintf(buf,
7531 "Error sending statistics request: 0x%08X\n", rc);
7532 return len;
7533 }
7534
7535 while (size && (PAGE_SIZE - len)) {
7536 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7537 PAGE_SIZE - len, 1);
7538 len = strlen(buf);
7539 if (PAGE_SIZE - len)
7540 buf[len++] = '\n';
7541
7542 ofs += 16;
7543 size -= min(size, 16U);
7544 }
7545
7546 return len;
7547 }
7548
7549 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7550
7551 static ssize_t show_antenna(struct device *d,
7552 struct device_attribute *attr, char *buf)
7553 {
7554 struct iwl_priv *priv = dev_get_drvdata(d);
7555
7556 if (!iwl_is_alive(priv))
7557 return -EAGAIN;
7558
7559 return sprintf(buf, "%d\n", priv->antenna);
7560 }
7561
7562 static ssize_t store_antenna(struct device *d,
7563 struct device_attribute *attr,
7564 const char *buf, size_t count)
7565 {
7566 int ant;
7567 struct iwl_priv *priv = dev_get_drvdata(d);
7568
7569 if (count == 0)
7570 return 0;
7571
7572 if (sscanf(buf, "%1i", &ant) != 1) {
7573 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7574 return count;
7575 }
7576
7577 if ((ant >= 0) && (ant <= 2)) {
7578 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7579 priv->antenna = (enum iwl4965_antenna)ant;
7580 } else
7581 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7582
7583
7584 return count;
7585 }
7586
7587 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7588
7589 static ssize_t show_status(struct device *d,
7590 struct device_attribute *attr, char *buf)
7591 {
7592 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7593 if (!iwl_is_alive(priv))
7594 return -EAGAIN;
7595 return sprintf(buf, "0x%08x\n", (int)priv->status);
7596 }
7597
7598 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7599
7600 static ssize_t dump_error_log(struct device *d,
7601 struct device_attribute *attr,
7602 const char *buf, size_t count)
7603 {
7604 char *p = (char *)buf;
7605
7606 if (p[0] == '1')
7607 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7608
7609 return strnlen(buf, count);
7610 }
7611
7612 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7613
7614 static ssize_t dump_event_log(struct device *d,
7615 struct device_attribute *attr,
7616 const char *buf, size_t count)
7617 {
7618 char *p = (char *)buf;
7619
7620 if (p[0] == '1')
7621 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7622
7623 return strnlen(buf, count);
7624 }
7625
7626 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7627
7628 /*****************************************************************************
7629 *
7630 * driver setup and teardown
7631 *
7632 *****************************************************************************/
7633
7634 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7635 {
7636 priv->workqueue = create_workqueue(DRV_NAME);
7637
7638 init_waitqueue_head(&priv->wait_command_queue);
7639
7640 INIT_WORK(&priv->up, iwl4965_bg_up);
7641 INIT_WORK(&priv->restart, iwl4965_bg_restart);
7642 INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7643 INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7644 INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7645 INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7646 INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7647 INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7648 INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7649 INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7650 INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7651 INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7652
7653 iwl4965_hw_setup_deferred_work(priv);
7654
7655 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7656 iwl4965_irq_tasklet, (unsigned long)priv);
7657 }
7658
7659 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7660 {
7661 iwl4965_hw_cancel_deferred_work(priv);
7662
7663 cancel_delayed_work_sync(&priv->init_alive_start);
7664 cancel_delayed_work(&priv->scan_check);
7665 cancel_delayed_work(&priv->alive_start);
7666 cancel_delayed_work(&priv->post_associate);
7667 cancel_work_sync(&priv->beacon_update);
7668 }
7669
7670 static struct attribute *iwl4965_sysfs_entries[] = {
7671 &dev_attr_antenna.attr,
7672 &dev_attr_channels.attr,
7673 &dev_attr_dump_errors.attr,
7674 &dev_attr_dump_events.attr,
7675 &dev_attr_flags.attr,
7676 &dev_attr_filter_flags.attr,
7677 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7678 &dev_attr_measurement.attr,
7679 #endif
7680 &dev_attr_power_level.attr,
7681 &dev_attr_retry_rate.attr,
7682 &dev_attr_rs_window.attr,
7683 &dev_attr_statistics.attr,
7684 &dev_attr_status.attr,
7685 &dev_attr_temperature.attr,
7686 &dev_attr_tx_power.attr,
7687
7688 NULL
7689 };
7690
7691 static struct attribute_group iwl4965_attribute_group = {
7692 .name = NULL, /* put in device directory */
7693 .attrs = iwl4965_sysfs_entries,
7694 };
7695
7696 static struct ieee80211_ops iwl4965_hw_ops = {
7697 .tx = iwl4965_mac_tx,
7698 .start = iwl4965_mac_start,
7699 .stop = iwl4965_mac_stop,
7700 .add_interface = iwl4965_mac_add_interface,
7701 .remove_interface = iwl4965_mac_remove_interface,
7702 .config = iwl4965_mac_config,
7703 .config_interface = iwl4965_mac_config_interface,
7704 .configure_filter = iwl4965_configure_filter,
7705 .set_key = iwl4965_mac_set_key,
7706 .update_tkip_key = iwl4965_mac_update_tkip_key,
7707 .get_stats = iwl4965_mac_get_stats,
7708 .get_tx_stats = iwl4965_mac_get_tx_stats,
7709 .conf_tx = iwl4965_mac_conf_tx,
7710 .get_tsf = iwl4965_mac_get_tsf,
7711 .reset_tsf = iwl4965_mac_reset_tsf,
7712 .beacon_update = iwl4965_mac_beacon_update,
7713 .bss_info_changed = iwl4965_bss_info_changed,
7714 #ifdef CONFIG_IWL4965_HT
7715 .ampdu_action = iwl4965_mac_ampdu_action,
7716 #endif /* CONFIG_IWL4965_HT */
7717 .hw_scan = iwl4965_mac_hw_scan
7718 };
7719
7720 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7721 {
7722 int err = 0;
7723 struct iwl_priv *priv;
7724 struct ieee80211_hw *hw;
7725 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7726 unsigned long flags;
7727 DECLARE_MAC_BUF(mac);
7728
7729 /************************
7730 * 1. Allocating HW data
7731 ************************/
7732
7733 /* Disabling hardware scan means that mac80211 will perform scans
7734 * "the hard way", rather than using device's scan. */
7735 if (cfg->mod_params->disable_hw_scan) {
7736 IWL_DEBUG_INFO("Disabling hw_scan\n");
7737 iwl4965_hw_ops.hw_scan = NULL;
7738 }
7739
7740 hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7741 if (!hw) {
7742 err = -ENOMEM;
7743 goto out;
7744 }
7745 priv = hw->priv;
7746 /* At this point both hw and priv are allocated. */
7747
7748 SET_IEEE80211_DEV(hw, &pdev->dev);
7749
7750 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7751 priv->cfg = cfg;
7752 priv->pci_dev = pdev;
7753
7754 #ifdef CONFIG_IWLWIFI_DEBUG
7755 iwl_debug_level = priv->cfg->mod_params->debug;
7756 atomic_set(&priv->restrict_refcnt, 0);
7757 #endif
7758
7759 /**************************
7760 * 2. Initializing PCI bus
7761 **************************/
7762 if (pci_enable_device(pdev)) {
7763 err = -ENODEV;
7764 goto out_ieee80211_free_hw;
7765 }
7766
7767 pci_set_master(pdev);
7768
7769 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7770 if (!err)
7771 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7772 if (err) {
7773 printk(KERN_WARNING DRV_NAME
7774 ": No suitable DMA available.\n");
7775 goto out_pci_disable_device;
7776 }
7777
7778 err = pci_request_regions(pdev, DRV_NAME);
7779 if (err)
7780 goto out_pci_disable_device;
7781
7782 pci_set_drvdata(pdev, priv);
7783
7784 /* We disable the RETRY_TIMEOUT register (0x41) to keep
7785 * PCI Tx retries from interfering with C3 CPU state */
7786 pci_write_config_byte(pdev, 0x41, 0x00);
7787
7788 /***********************
7789 * 3. Read REV register
7790 ***********************/
7791 priv->hw_base = pci_iomap(pdev, 0, 0);
7792 if (!priv->hw_base) {
7793 err = -ENODEV;
7794 goto out_pci_release_regions;
7795 }
7796
7797 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7798 (unsigned long long) pci_resource_len(pdev, 0));
7799 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7800
7801 printk(KERN_INFO DRV_NAME
7802 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7803
7804 /*****************
7805 * 4. Read EEPROM
7806 *****************/
7807 /* nic init */
7808 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7809 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7810
7811 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7812 err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7813 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7814 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7815 if (err < 0) {
7816 IWL_DEBUG_INFO("Failed to init the card\n");
7817 goto out_iounmap;
7818 }
7819 /* Read the EEPROM */
7820 err = iwl_eeprom_init(priv);
7821 if (err) {
7822 IWL_ERROR("Unable to init EEPROM\n");
7823 goto out_iounmap;
7824 }
7825 /* MAC Address location in EEPROM same for 3945/4965 */
7826 iwl_eeprom_get_mac(priv, priv->mac_addr);
7827 IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7828 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7829
7830 /************************
7831 * 5. Setup HW constants
7832 ************************/
7833 /* Device-specific setup */
7834 if (priv->cfg->ops->lib->set_hw_params(priv)) {
7835 IWL_ERROR("failed to set hw parameters\n");
7836 goto out_iounmap;
7837 }
7838
7839 /*******************
7840 * 6. Setup hw/priv
7841 *******************/
7842
7843 err = iwl_setup(priv);
7844 if (err)
7845 goto out_unset_hw_params;
7846 /* At this point both hw and priv are initialized. */
7847
7848 /**********************************
7849 * 7. Initialize module parameters
7850 **********************************/
7851
7852 /* Disable radio (SW RF KILL) via parameter when loading driver */
7853 if (priv->cfg->mod_params->disable) {
7854 set_bit(STATUS_RF_KILL_SW, &priv->status);
7855 IWL_DEBUG_INFO("Radio disabled.\n");
7856 }
7857
7858 if (priv->cfg->mod_params->enable_qos)
7859 priv->qos_data.qos_enable = 1;
7860
7861 /********************
7862 * 8. Setup services
7863 ********************/
7864 spin_lock_irqsave(&priv->lock, flags);
7865 iwl4965_disable_interrupts(priv);
7866 spin_unlock_irqrestore(&priv->lock, flags);
7867
7868 err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7869 if (err) {
7870 IWL_ERROR("failed to create sysfs device attributes\n");
7871 goto out_unset_hw_params;
7872 }
7873
7874 err = iwl_dbgfs_register(priv, DRV_NAME);
7875 if (err) {
7876 IWL_ERROR("failed to create debugfs files\n");
7877 goto out_remove_sysfs;
7878 }
7879
7880 iwl4965_setup_deferred_work(priv);
7881 iwl4965_setup_rx_handlers(priv);
7882
7883 /********************
7884 * 9. Conclude
7885 ********************/
7886 pci_save_state(pdev);
7887 pci_disable_device(pdev);
7888
7889 /* notify iwlcore to init */
7890 iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7891 return 0;
7892
7893 out_remove_sysfs:
7894 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7895 out_unset_hw_params:
7896 iwl4965_unset_hw_params(priv);
7897 out_iounmap:
7898 pci_iounmap(pdev, priv->hw_base);
7899 out_pci_release_regions:
7900 pci_release_regions(pdev);
7901 pci_set_drvdata(pdev, NULL);
7902 out_pci_disable_device:
7903 pci_disable_device(pdev);
7904 out_ieee80211_free_hw:
7905 ieee80211_free_hw(priv->hw);
7906 out:
7907 return err;
7908 }
7909
7910 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7911 {
7912 struct iwl_priv *priv = pci_get_drvdata(pdev);
7913 struct list_head *p, *q;
7914 int i;
7915 unsigned long flags;
7916
7917 if (!priv)
7918 return;
7919
7920 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7921
7922 if (priv->mac80211_registered) {
7923 ieee80211_unregister_hw(priv->hw);
7924 priv->mac80211_registered = 0;
7925 }
7926
7927 set_bit(STATUS_EXIT_PENDING, &priv->status);
7928
7929 iwl4965_down(priv);
7930
7931 /* make sure we flush any pending irq or
7932 * tasklet for the driver
7933 */
7934 spin_lock_irqsave(&priv->lock, flags);
7935 iwl4965_disable_interrupts(priv);
7936 spin_unlock_irqrestore(&priv->lock, flags);
7937
7938 iwl_synchronize_irq(priv);
7939
7940 /* Free MAC hash list for ADHOC */
7941 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7942 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7943 list_del(p);
7944 kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7945 }
7946 }
7947
7948 iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7949 iwl_dbgfs_unregister(priv);
7950 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7951
7952 iwl4965_dealloc_ucode_pci(priv);
7953
7954 if (priv->rxq.bd)
7955 iwl4965_rx_queue_free(priv, &priv->rxq);
7956 iwl4965_hw_txq_ctx_free(priv);
7957
7958 iwl4965_unset_hw_params(priv);
7959 iwlcore_clear_stations_table(priv);
7960
7961
7962 /*netif_stop_queue(dev); */
7963 flush_workqueue(priv->workqueue);
7964
7965 /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7966 * priv->workqueue... so we can't take down the workqueue
7967 * until now... */
7968 destroy_workqueue(priv->workqueue);
7969 priv->workqueue = NULL;
7970
7971 pci_iounmap(pdev, priv->hw_base);
7972 pci_release_regions(pdev);
7973 pci_disable_device(pdev);
7974 pci_set_drvdata(pdev, NULL);
7975
7976 iwl_free_channel_map(priv);
7977 iwl4965_free_geos(priv);
7978
7979 if (priv->ibss_beacon)
7980 dev_kfree_skb(priv->ibss_beacon);
7981
7982 ieee80211_free_hw(priv->hw);
7983 }
7984
7985 #ifdef CONFIG_PM
7986
7987 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7988 {
7989 struct iwl_priv *priv = pci_get_drvdata(pdev);
7990
7991 if (priv->is_open) {
7992 set_bit(STATUS_IN_SUSPEND, &priv->status);
7993 iwl4965_mac_stop(priv->hw);
7994 priv->is_open = 1;
7995 }
7996
7997 pci_set_power_state(pdev, PCI_D3hot);
7998
7999 return 0;
8000 }
8001
8002 static int iwl4965_pci_resume(struct pci_dev *pdev)
8003 {
8004 struct iwl_priv *priv = pci_get_drvdata(pdev);
8005
8006 pci_set_power_state(pdev, PCI_D0);
8007
8008 if (priv->is_open)
8009 iwl4965_mac_start(priv->hw);
8010
8011 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8012 return 0;
8013 }
8014
8015 #endif /* CONFIG_PM */
8016
8017 /*****************************************************************************
8018 *
8019 * driver and module entry point
8020 *
8021 *****************************************************************************/
8022
8023 /* Hardware specific file defines the PCI IDs table for that hardware module */
8024 static struct pci_device_id iwl_hw_card_ids[] = {
8025 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
8026 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
8027 {0}
8028 };
8029 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
8030
8031 static struct pci_driver iwl_driver = {
8032 .name = DRV_NAME,
8033 .id_table = iwl_hw_card_ids,
8034 .probe = iwl4965_pci_probe,
8035 .remove = __devexit_p(iwl4965_pci_remove),
8036 #ifdef CONFIG_PM
8037 .suspend = iwl4965_pci_suspend,
8038 .resume = iwl4965_pci_resume,
8039 #endif
8040 };
8041
8042 static int __init iwl4965_init(void)
8043 {
8044
8045 int ret;
8046 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8047 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8048
8049 ret = iwl4965_rate_control_register();
8050 if (ret) {
8051 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8052 return ret;
8053 }
8054
8055 ret = pci_register_driver(&iwl_driver);
8056 if (ret) {
8057 IWL_ERROR("Unable to initialize PCI module\n");
8058 goto error_register;
8059 }
8060 #ifdef CONFIG_IWLWIFI_DEBUG
8061 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8062 if (ret) {
8063 IWL_ERROR("Unable to create driver sysfs file\n");
8064 goto error_debug;
8065 }
8066 #endif
8067
8068 return ret;
8069
8070 #ifdef CONFIG_IWLWIFI_DEBUG
8071 error_debug:
8072 pci_unregister_driver(&iwl_driver);
8073 #endif
8074 error_register:
8075 iwl4965_rate_control_unregister();
8076 return ret;
8077 }
8078
8079 static void __exit iwl4965_exit(void)
8080 {
8081 #ifdef CONFIG_IWLWIFI_DEBUG
8082 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8083 #endif
8084 pci_unregister_driver(&iwl_driver);
8085 iwl4965_rate_control_unregister();
8086 }
8087
8088 module_exit(iwl4965_exit);
8089 module_init(iwl4965_init);
Linux with added FPC-III support