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iwlwifi-5000: adding initial recognition for the 5000 family
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl4965-base.c
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 #include "iwl-calib.h"
55
56 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
57 struct iwl4965_tx_queue *txq);
58
59 /******************************************************************************
60 *
61 * module boiler plate
62 *
63 ******************************************************************************/
64
65 /*
66 * module name, copyright, version, etc.
67 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
68 */
69
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
71
72 #ifdef CONFIG_IWLWIFI_DEBUG
73 #define VD "d"
74 #else
75 #define VD
76 #endif
77
78 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
79 #define VS "s"
80 #else
81 #define VS
82 #endif
83
84 #define DRV_VERSION IWLWIFI_VERSION VD VS
85
86
87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
88 MODULE_VERSION(DRV_VERSION);
89 MODULE_AUTHOR(DRV_COPYRIGHT);
90 MODULE_LICENSE("GPL");
91
92 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
93 {
94 u16 fc = le16_to_cpu(hdr->frame_control);
95 int hdr_len = ieee80211_get_hdrlen(fc);
96
97 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
98 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
99 return NULL;
100 }
101
102 static const struct ieee80211_supported_band *iwl_get_hw_mode(
103 struct iwl_priv *priv, enum ieee80211_band band)
104 {
105 return priv->hw->wiphy->bands[band];
106 }
107
108 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
109 {
110 /* Single white space is for Linksys APs */
111 if (essid_len == 1 && essid[0] == ' ')
112 return 1;
113
114 /* Otherwise, if the entire essid is 0, we assume it is hidden */
115 while (essid_len) {
116 essid_len--;
117 if (essid[essid_len] != '\0')
118 return 0;
119 }
120
121 return 1;
122 }
123
124 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
125 {
126 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
127 const char *s = essid;
128 char *d = escaped;
129
130 if (iwl4965_is_empty_essid(essid, essid_len)) {
131 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
132 return escaped;
133 }
134
135 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
136 while (essid_len--) {
137 if (*s == '\0') {
138 *d++ = '\\';
139 *d++ = '0';
140 s++;
141 } else
142 *d++ = *s++;
143 }
144 *d = '\0';
145 return escaped;
146 }
147
148 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
149 * DMA services
150 *
151 * Theory of operation
152 *
153 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
154 * of buffer descriptors, each of which points to one or more data buffers for
155 * the device to read from or fill. Driver and device exchange status of each
156 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
157 * entries in each circular buffer, to protect against confusing empty and full
158 * queue states.
159 *
160 * The device reads or writes the data in the queues via the device's several
161 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
162 *
163 * For Tx queue, there are low mark and high mark limits. If, after queuing
164 * the packet for Tx, free space become < low mark, Tx queue stopped. When
165 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
166 * Tx queue resumed.
167 *
168 * The 4965 operates with up to 17 queues: One receive queue, one transmit
169 * queue (#4) for sending commands to the device firmware, and 15 other
170 * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
171 *
172 * See more detailed info in iwl-4965-hw.h.
173 ***************************************************/
174
175 int iwl4965_queue_space(const struct iwl4965_queue *q)
176 {
177 int s = q->read_ptr - q->write_ptr;
178
179 if (q->read_ptr > q->write_ptr)
180 s -= q->n_bd;
181
182 if (s <= 0)
183 s += q->n_window;
184 /* keep some reserve to not confuse empty and full situations */
185 s -= 2;
186 if (s < 0)
187 s = 0;
188 return s;
189 }
190
191
192 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
193 {
194 return q->write_ptr > q->read_ptr ?
195 (i >= q->read_ptr && i < q->write_ptr) :
196 !(i < q->read_ptr && i >= q->write_ptr);
197 }
198
199 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
200 {
201 /* This is for scan command, the big buffer at end of command array */
202 if (is_huge)
203 return q->n_window; /* must be power of 2 */
204
205 /* Otherwise, use normal size buffers */
206 return index & (q->n_window - 1);
207 }
208
209 /**
210 * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
211 */
212 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
213 int count, int slots_num, u32 id)
214 {
215 q->n_bd = count;
216 q->n_window = slots_num;
217 q->id = id;
218
219 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
220 * and iwl_queue_dec_wrap are broken. */
221 BUG_ON(!is_power_of_2(count));
222
223 /* slots_num must be power-of-two size, otherwise
224 * get_cmd_index is broken. */
225 BUG_ON(!is_power_of_2(slots_num));
226
227 q->low_mark = q->n_window / 4;
228 if (q->low_mark < 4)
229 q->low_mark = 4;
230
231 q->high_mark = q->n_window / 8;
232 if (q->high_mark < 2)
233 q->high_mark = 2;
234
235 q->write_ptr = q->read_ptr = 0;
236
237 return 0;
238 }
239
240 /**
241 * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
242 */
243 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
244 struct iwl4965_tx_queue *txq, u32 id)
245 {
246 struct pci_dev *dev = priv->pci_dev;
247
248 /* Driver private data, only for Tx (not command) queues,
249 * not shared with device. */
250 if (id != IWL_CMD_QUEUE_NUM) {
251 txq->txb = kmalloc(sizeof(txq->txb[0]) *
252 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
253 if (!txq->txb) {
254 IWL_ERROR("kmalloc for auxiliary BD "
255 "structures failed\n");
256 goto error;
257 }
258 } else
259 txq->txb = NULL;
260
261 /* Circular buffer of transmit frame descriptors (TFDs),
262 * shared with device */
263 txq->bd = pci_alloc_consistent(dev,
264 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
265 &txq->q.dma_addr);
266
267 if (!txq->bd) {
268 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
269 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
270 goto error;
271 }
272 txq->q.id = id;
273
274 return 0;
275
276 error:
277 if (txq->txb) {
278 kfree(txq->txb);
279 txq->txb = NULL;
280 }
281
282 return -ENOMEM;
283 }
284
285 /**
286 * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
287 */
288 int iwl4965_tx_queue_init(struct iwl_priv *priv,
289 struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
290 {
291 struct pci_dev *dev = priv->pci_dev;
292 int len;
293 int rc = 0;
294
295 /*
296 * Alloc buffer array for commands (Tx or other types of commands).
297 * For the command queue (#4), allocate command space + one big
298 * command for scan, since scan command is very huge; the system will
299 * not have two scans at the same time, so only one is needed.
300 * For normal Tx queues (all other queues), no super-size command
301 * space is needed.
302 */
303 len = sizeof(struct iwl_cmd) * slots_num;
304 if (txq_id == IWL_CMD_QUEUE_NUM)
305 len += IWL_MAX_SCAN_SIZE;
306 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
307 if (!txq->cmd)
308 return -ENOMEM;
309
310 /* Alloc driver data array and TFD circular buffer */
311 rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
312 if (rc) {
313 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
314
315 return -ENOMEM;
316 }
317 txq->need_update = 0;
318
319 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
320 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
321 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
322
323 /* Initialize queue's high/low-water marks, and head/tail indexes */
324 iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
325
326 /* Tell device where to find queue */
327 iwl4965_hw_tx_queue_init(priv, txq);
328
329 return 0;
330 }
331
332 /**
333 * iwl4965_tx_queue_free - Deallocate DMA queue.
334 * @txq: Transmit queue to deallocate.
335 *
336 * Empty queue by removing and destroying all BD's.
337 * Free all buffers.
338 * 0-fill, but do not free "txq" descriptor structure.
339 */
340 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
341 {
342 struct iwl4965_queue *q = &txq->q;
343 struct pci_dev *dev = priv->pci_dev;
344 int len;
345
346 if (q->n_bd == 0)
347 return;
348
349 /* first, empty all BD's */
350 for (; q->write_ptr != q->read_ptr;
351 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
352 iwl4965_hw_txq_free_tfd(priv, txq);
353
354 len = sizeof(struct iwl_cmd) * q->n_window;
355 if (q->id == IWL_CMD_QUEUE_NUM)
356 len += IWL_MAX_SCAN_SIZE;
357
358 /* De-alloc array of command/tx buffers */
359 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
360
361 /* De-alloc circular buffer of TFDs */
362 if (txq->q.n_bd)
363 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
364 txq->q.n_bd, txq->bd, txq->q.dma_addr);
365
366 /* De-alloc array of per-TFD driver data */
367 if (txq->txb) {
368 kfree(txq->txb);
369 txq->txb = NULL;
370 }
371
372 /* 0-fill queue descriptor structure */
373 memset(txq, 0, sizeof(*txq));
374 }
375
376 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
377
378 /*************** STATION TABLE MANAGEMENT ****
379 * mac80211 should be examined to determine if sta_info is duplicating
380 * the functionality provided here
381 */
382
383 /**************************************************************/
384
385 #if 0 /* temporary disable till we add real remove station */
386 /**
387 * iwl4965_remove_station - Remove driver's knowledge of station.
388 *
389 * NOTE: This does not remove station from device's station table.
390 */
391 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
392 {
393 int index = IWL_INVALID_STATION;
394 int i;
395 unsigned long flags;
396
397 spin_lock_irqsave(&priv->sta_lock, flags);
398
399 if (is_ap)
400 index = IWL_AP_ID;
401 else if (is_broadcast_ether_addr(addr))
402 index = priv->hw_params.bcast_sta_id;
403 else
404 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
405 if (priv->stations[i].used &&
406 !compare_ether_addr(priv->stations[i].sta.sta.addr,
407 addr)) {
408 index = i;
409 break;
410 }
411
412 if (unlikely(index == IWL_INVALID_STATION))
413 goto out;
414
415 if (priv->stations[index].used) {
416 priv->stations[index].used = 0;
417 priv->num_stations--;
418 }
419
420 BUG_ON(priv->num_stations < 0);
421
422 out:
423 spin_unlock_irqrestore(&priv->sta_lock, flags);
424 return 0;
425 }
426 #endif
427
428 /**
429 * iwl4965_add_station_flags - Add station to tables in driver and device
430 */
431 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
432 int is_ap, u8 flags, void *ht_data)
433 {
434 int i;
435 int index = IWL_INVALID_STATION;
436 struct iwl4965_station_entry *station;
437 unsigned long flags_spin;
438 DECLARE_MAC_BUF(mac);
439
440 spin_lock_irqsave(&priv->sta_lock, flags_spin);
441 if (is_ap)
442 index = IWL_AP_ID;
443 else if (is_broadcast_ether_addr(addr))
444 index = priv->hw_params.bcast_sta_id;
445 else
446 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
447 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
448 addr)) {
449 index = i;
450 break;
451 }
452
453 if (!priv->stations[i].used &&
454 index == IWL_INVALID_STATION)
455 index = i;
456 }
457
458
459 /* These two conditions have the same outcome, but keep them separate
460 since they have different meanings */
461 if (unlikely(index == IWL_INVALID_STATION)) {
462 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
463 return index;
464 }
465
466 if (priv->stations[index].used &&
467 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
468 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
469 return index;
470 }
471
472
473 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
474 station = &priv->stations[index];
475 station->used = 1;
476 priv->num_stations++;
477
478 /* Set up the REPLY_ADD_STA command to send to device */
479 memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
480 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
481 station->sta.mode = 0;
482 station->sta.sta.sta_id = index;
483 station->sta.station_flags = 0;
484
485 #ifdef CONFIG_IWL4965_HT
486 /* BCAST station and IBSS stations do not work in HT mode */
487 if (index != priv->hw_params.bcast_sta_id &&
488 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
489 iwl4965_set_ht_add_station(priv, index,
490 (struct ieee80211_ht_info *) ht_data);
491 #endif /*CONFIG_IWL4965_HT*/
492
493 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
494
495 /* Add station to device's station table */
496 iwl4965_send_add_station(priv, &station->sta, flags);
497 return index;
498
499 }
500
501
502
503 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
504
505 /**
506 * iwl4965_enqueue_hcmd - enqueue a uCode command
507 * @priv: device private data point
508 * @cmd: a point to the ucode command structure
509 *
510 * The function returns < 0 values to indicate the operation is
511 * failed. On success, it turns the index (> 0) of command in the
512 * command queue.
513 */
514 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
515 {
516 struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
517 struct iwl4965_queue *q = &txq->q;
518 struct iwl4965_tfd_frame *tfd;
519 u32 *control_flags;
520 struct iwl_cmd *out_cmd;
521 u32 idx;
522 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
523 dma_addr_t phys_addr;
524 int ret;
525 unsigned long flags;
526
527 /* If any of the command structures end up being larger than
528 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
529 * we will need to increase the size of the TFD entries */
530 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
531 !(cmd->meta.flags & CMD_SIZE_HUGE));
532
533 if (iwl_is_rfkill(priv)) {
534 IWL_DEBUG_INFO("Not sending command - RF KILL");
535 return -EIO;
536 }
537
538 if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
539 IWL_ERROR("No space for Tx\n");
540 return -ENOSPC;
541 }
542
543 spin_lock_irqsave(&priv->hcmd_lock, flags);
544
545 tfd = &txq->bd[q->write_ptr];
546 memset(tfd, 0, sizeof(*tfd));
547
548 control_flags = (u32 *) tfd;
549
550 idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
551 out_cmd = &txq->cmd[idx];
552
553 out_cmd->hdr.cmd = cmd->id;
554 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
555 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
556
557 /* At this point, the out_cmd now has all of the incoming cmd
558 * information */
559
560 out_cmd->hdr.flags = 0;
561 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
562 INDEX_TO_SEQ(q->write_ptr));
563 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
564 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
565
566 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
567 offsetof(struct iwl_cmd, hdr);
568 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
569
570 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
571 "%d bytes at %d[%d]:%d\n",
572 get_cmd_string(out_cmd->hdr.cmd),
573 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
574 fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
575
576 txq->need_update = 1;
577
578 /* Set up entry in queue's byte count circular buffer */
579 priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
580
581 /* Increment and update queue's write index */
582 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
583 ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
584
585 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
586 return ret ? ret : idx;
587 }
588
589 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
590 {
591 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
592
593 if (hw_decrypt)
594 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
595 else
596 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
597
598 }
599
600 /**
601 * iwl4965_rxon_add_station - add station into station table.
602 *
603 * there is only one AP station with id= IWL_AP_ID
604 * NOTE: mutex must be held before calling this fnction
605 */
606 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
607 const u8 *addr, int is_ap)
608 {
609 u8 sta_id;
610
611 /* Add station to device's station table */
612 #ifdef CONFIG_IWL4965_HT
613 struct ieee80211_conf *conf = &priv->hw->conf;
614 struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
615
616 if ((is_ap) &&
617 (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
618 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
619 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
620 0, cur_ht_config);
621 else
622 #endif /* CONFIG_IWL4965_HT */
623 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
624 0, NULL);
625
626 /* Set up default rate scaling table in device's station table */
627 iwl4965_add_station(priv, addr, is_ap);
628
629 return sta_id;
630 }
631
632 /**
633 * iwl4965_check_rxon_cmd - validate RXON structure is valid
634 *
635 * NOTE: This is really only useful during development and can eventually
636 * be #ifdef'd out once the driver is stable and folks aren't actively
637 * making changes
638 */
639 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
640 {
641 int error = 0;
642 int counter = 1;
643
644 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
645 error |= le32_to_cpu(rxon->flags &
646 (RXON_FLG_TGJ_NARROW_BAND_MSK |
647 RXON_FLG_RADAR_DETECT_MSK));
648 if (error)
649 IWL_WARNING("check 24G fields %d | %d\n",
650 counter++, error);
651 } else {
652 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
653 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
654 if (error)
655 IWL_WARNING("check 52 fields %d | %d\n",
656 counter++, error);
657 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
658 if (error)
659 IWL_WARNING("check 52 CCK %d | %d\n",
660 counter++, error);
661 }
662 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
663 if (error)
664 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
665
666 /* make sure basic rates 6Mbps and 1Mbps are supported */
667 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
668 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
669 if (error)
670 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
671
672 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
673 if (error)
674 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
675
676 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
677 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
678 if (error)
679 IWL_WARNING("check CCK and short slot %d | %d\n",
680 counter++, error);
681
682 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
683 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
684 if (error)
685 IWL_WARNING("check CCK & auto detect %d | %d\n",
686 counter++, error);
687
688 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
689 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
690 if (error)
691 IWL_WARNING("check TGG and auto detect %d | %d\n",
692 counter++, error);
693
694 if (error)
695 IWL_WARNING("Tuning to channel %d\n",
696 le16_to_cpu(rxon->channel));
697
698 if (error) {
699 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
700 return -1;
701 }
702 return 0;
703 }
704
705 /**
706 * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
707 * @priv: staging_rxon is compared to active_rxon
708 *
709 * If the RXON structure is changing enough to require a new tune,
710 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
711 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
712 */
713 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
714 {
715
716 /* These items are only settable from the full RXON command */
717 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
718 compare_ether_addr(priv->staging_rxon.bssid_addr,
719 priv->active_rxon.bssid_addr) ||
720 compare_ether_addr(priv->staging_rxon.node_addr,
721 priv->active_rxon.node_addr) ||
722 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
723 priv->active_rxon.wlap_bssid_addr) ||
724 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
725 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
726 (priv->staging_rxon.air_propagation !=
727 priv->active_rxon.air_propagation) ||
728 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
729 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
730 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
731 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
732 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
733 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
734 return 1;
735
736 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
737 * be updated with the RXON_ASSOC command -- however only some
738 * flag transitions are allowed using RXON_ASSOC */
739
740 /* Check if we are not switching bands */
741 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
742 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
743 return 1;
744
745 /* Check if we are switching association toggle */
746 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
747 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
748 return 1;
749
750 return 0;
751 }
752
753 /**
754 * iwl4965_commit_rxon - commit staging_rxon to hardware
755 *
756 * The RXON command in staging_rxon is committed to the hardware and
757 * the active_rxon structure is updated with the new data. This
758 * function correctly transitions out of the RXON_ASSOC_MSK state if
759 * a HW tune is required based on the RXON structure changes.
760 */
761 static int iwl4965_commit_rxon(struct iwl_priv *priv)
762 {
763 /* cast away the const for active_rxon in this function */
764 struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
765 DECLARE_MAC_BUF(mac);
766 int rc = 0;
767
768 if (!iwl_is_alive(priv))
769 return -1;
770
771 /* always get timestamp with Rx frame */
772 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
773
774 rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
775 if (rc) {
776 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
777 return -EINVAL;
778 }
779
780 /* If we don't need to send a full RXON, we can use
781 * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
782 * and other flags for the current radio configuration. */
783 if (!iwl4965_full_rxon_required(priv)) {
784 rc = iwl_send_rxon_assoc(priv);
785 if (rc) {
786 IWL_ERROR("Error setting RXON_ASSOC "
787 "configuration (%d).\n", rc);
788 return rc;
789 }
790
791 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
792
793 return 0;
794 }
795
796 /* station table will be cleared */
797 priv->assoc_station_added = 0;
798
799 /* If we are currently associated and the new config requires
800 * an RXON_ASSOC and the new config wants the associated mask enabled,
801 * we must clear the associated from the active configuration
802 * before we apply the new config */
803 if (iwl_is_associated(priv) &&
804 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
805 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
806 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
807
808 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
809 sizeof(struct iwl4965_rxon_cmd),
810 &priv->active_rxon);
811
812 /* If the mask clearing failed then we set
813 * active_rxon back to what it was previously */
814 if (rc) {
815 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
816 IWL_ERROR("Error clearing ASSOC_MSK on current "
817 "configuration (%d).\n", rc);
818 return rc;
819 }
820 }
821
822 IWL_DEBUG_INFO("Sending RXON\n"
823 "* with%s RXON_FILTER_ASSOC_MSK\n"
824 "* channel = %d\n"
825 "* bssid = %s\n",
826 ((priv->staging_rxon.filter_flags &
827 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
828 le16_to_cpu(priv->staging_rxon.channel),
829 print_mac(mac, priv->staging_rxon.bssid_addr));
830
831 iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
832 /* Apply the new configuration */
833 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
834 sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
835 if (rc) {
836 IWL_ERROR("Error setting new configuration (%d).\n", rc);
837 return rc;
838 }
839
840 iwlcore_clear_stations_table(priv);
841
842 if (!priv->error_recovering)
843 priv->start_calib = 0;
844
845 iwl_init_sensitivity(priv);
846
847 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
848
849 /* If we issue a new RXON command which required a tune then we must
850 * send a new TXPOWER command or we won't be able to Tx any frames */
851 rc = iwl4965_hw_reg_send_txpower(priv);
852 if (rc) {
853 IWL_ERROR("Error setting Tx power (%d).\n", rc);
854 return rc;
855 }
856
857 /* Add the broadcast address so we can send broadcast frames */
858 if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
859 IWL_INVALID_STATION) {
860 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
861 return -EIO;
862 }
863
864 /* If we have set the ASSOC_MSK and we are in BSS mode then
865 * add the IWL_AP_ID to the station rate table */
866 if (iwl_is_associated(priv) &&
867 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
868 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
869 == IWL_INVALID_STATION) {
870 IWL_ERROR("Error adding AP address for transmit.\n");
871 return -EIO;
872 }
873 priv->assoc_station_added = 1;
874 if (priv->default_wep_key &&
875 iwl_send_static_wepkey_cmd(priv, 0))
876 IWL_ERROR("Could not send WEP static key.\n");
877 }
878
879 return 0;
880 }
881
882 void iwl4965_update_chain_flags(struct iwl_priv *priv)
883 {
884
885 iwl_set_rxon_chain(priv);
886 iwl4965_commit_rxon(priv);
887 }
888
889 static int iwl4965_send_bt_config(struct iwl_priv *priv)
890 {
891 struct iwl4965_bt_cmd bt_cmd = {
892 .flags = 3,
893 .lead_time = 0xAA,
894 .max_kill = 1,
895 .kill_ack_mask = 0,
896 .kill_cts_mask = 0,
897 };
898
899 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
900 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
901 }
902
903 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
904 {
905 int rc = 0;
906 struct iwl4965_rx_packet *res;
907 struct iwl_host_cmd cmd = {
908 .id = REPLY_SCAN_ABORT_CMD,
909 .meta.flags = CMD_WANT_SKB,
910 };
911
912 /* If there isn't a scan actively going on in the hardware
913 * then we are in between scan bands and not actually
914 * actively scanning, so don't send the abort command */
915 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
916 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
917 return 0;
918 }
919
920 rc = iwl_send_cmd_sync(priv, &cmd);
921 if (rc) {
922 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
923 return rc;
924 }
925
926 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
927 if (res->u.status != CAN_ABORT_STATUS) {
928 /* The scan abort will return 1 for success or
929 * 2 for "failure". A failure condition can be
930 * due to simply not being in an active scan which
931 * can occur if we send the scan abort before we
932 * the microcode has notified us that a scan is
933 * completed. */
934 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
935 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
936 clear_bit(STATUS_SCAN_HW, &priv->status);
937 }
938
939 dev_kfree_skb_any(cmd.meta.u.skb);
940
941 return rc;
942 }
943
944 /*
945 * CARD_STATE_CMD
946 *
947 * Use: Sets the device's internal card state to enable, disable, or halt
948 *
949 * When in the 'enable' state the card operates as normal.
950 * When in the 'disable' state, the card enters into a low power mode.
951 * When in the 'halt' state, the card is shut down and must be fully
952 * restarted to come back on.
953 */
954 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
955 {
956 struct iwl_host_cmd cmd = {
957 .id = REPLY_CARD_STATE_CMD,
958 .len = sizeof(u32),
959 .data = &flags,
960 .meta.flags = meta_flag,
961 };
962
963 return iwl_send_cmd(priv, &cmd);
964 }
965
966 int iwl4965_send_add_station(struct iwl_priv *priv,
967 struct iwl4965_addsta_cmd *sta, u8 flags)
968 {
969 struct iwl4965_rx_packet *res = NULL;
970 int rc = 0;
971 struct iwl_host_cmd cmd = {
972 .id = REPLY_ADD_STA,
973 .len = sizeof(struct iwl4965_addsta_cmd),
974 .meta.flags = flags,
975 .data = sta,
976 };
977
978 if (!(flags & CMD_ASYNC))
979 cmd.meta.flags |= CMD_WANT_SKB;
980
981 rc = iwl_send_cmd(priv, &cmd);
982
983 if (rc || (flags & CMD_ASYNC))
984 return rc;
985
986 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
987 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
988 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
989 res->hdr.flags);
990 rc = -EIO;
991 }
992
993 if (rc == 0) {
994 switch (res->u.add_sta.status) {
995 case ADD_STA_SUCCESS_MSK:
996 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
997 break;
998 default:
999 rc = -EIO;
1000 IWL_WARNING("REPLY_ADD_STA failed\n");
1001 break;
1002 }
1003 }
1004
1005 priv->alloc_rxb_skb--;
1006 dev_kfree_skb_any(cmd.meta.u.skb);
1007
1008 return rc;
1009 }
1010
1011 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1012 {
1013 struct list_head *element;
1014
1015 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1016 priv->frames_count);
1017
1018 while (!list_empty(&priv->free_frames)) {
1019 element = priv->free_frames.next;
1020 list_del(element);
1021 kfree(list_entry(element, struct iwl4965_frame, list));
1022 priv->frames_count--;
1023 }
1024
1025 if (priv->frames_count) {
1026 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1027 priv->frames_count);
1028 priv->frames_count = 0;
1029 }
1030 }
1031
1032 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1033 {
1034 struct iwl4965_frame *frame;
1035 struct list_head *element;
1036 if (list_empty(&priv->free_frames)) {
1037 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1038 if (!frame) {
1039 IWL_ERROR("Could not allocate frame!\n");
1040 return NULL;
1041 }
1042
1043 priv->frames_count++;
1044 return frame;
1045 }
1046
1047 element = priv->free_frames.next;
1048 list_del(element);
1049 return list_entry(element, struct iwl4965_frame, list);
1050 }
1051
1052 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1053 {
1054 memset(frame, 0, sizeof(*frame));
1055 list_add(&frame->list, &priv->free_frames);
1056 }
1057
1058 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1059 struct ieee80211_hdr *hdr,
1060 const u8 *dest, int left)
1061 {
1062
1063 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1064 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1065 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1066 return 0;
1067
1068 if (priv->ibss_beacon->len > left)
1069 return 0;
1070
1071 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1072
1073 return priv->ibss_beacon->len;
1074 }
1075
1076 static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
1077 {
1078 int i;
1079 int rate_mask;
1080
1081 /* Set rate mask*/
1082 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1083 rate_mask = priv->active_rate_basic & 0xF;
1084 else
1085 rate_mask = priv->active_rate_basic & 0xFF0;
1086
1087 /* Find lowest valid rate */
1088 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1089 i = iwl4965_rates[i].next_ieee) {
1090 if (rate_mask & (1 << i))
1091 return iwl4965_rates[i].plcp;
1092 }
1093
1094 /* No valid rate was found. Assign the lowest one */
1095 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1096 return IWL_RATE_1M_PLCP;
1097 else
1098 return IWL_RATE_6M_PLCP;
1099 }
1100
1101 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1102 {
1103 struct iwl4965_frame *frame;
1104 unsigned int frame_size;
1105 int rc;
1106 u8 rate;
1107
1108 frame = iwl4965_get_free_frame(priv);
1109
1110 if (!frame) {
1111 IWL_ERROR("Could not obtain free frame buffer for beacon "
1112 "command.\n");
1113 return -ENOMEM;
1114 }
1115
1116 rate = iwl4965_rate_get_lowest_plcp(priv);
1117
1118 frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1119
1120 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1121 &frame->u.cmd[0]);
1122
1123 iwl4965_free_frame(priv, frame);
1124
1125 return rc;
1126 }
1127
1128 /******************************************************************************
1129 *
1130 * Misc. internal state and helper functions
1131 *
1132 ******************************************************************************/
1133
1134 /**
1135 * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1136 *
1137 * return : set the bit for each supported rate insert in ie
1138 */
1139 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1140 u16 basic_rate, int *left)
1141 {
1142 u16 ret_rates = 0, bit;
1143 int i;
1144 u8 *cnt = ie;
1145 u8 *rates = ie + 1;
1146
1147 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1148 if (bit & supported_rate) {
1149 ret_rates |= bit;
1150 rates[*cnt] = iwl4965_rates[i].ieee |
1151 ((bit & basic_rate) ? 0x80 : 0x00);
1152 (*cnt)++;
1153 (*left)--;
1154 if ((*left <= 0) ||
1155 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1156 break;
1157 }
1158 }
1159
1160 return ret_rates;
1161 }
1162
1163 #ifdef CONFIG_IWL4965_HT
1164 static void iwl4965_ht_conf(struct iwl_priv *priv,
1165 struct ieee80211_bss_conf *bss_conf)
1166 {
1167 struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
1168 struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
1169 struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
1170
1171 IWL_DEBUG_MAC80211("enter: \n");
1172
1173 iwl_conf->is_ht = bss_conf->assoc_ht;
1174
1175 if (!iwl_conf->is_ht)
1176 return;
1177
1178 priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1179
1180 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
1181 iwl_conf->sgf |= 0x1;
1182 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
1183 iwl_conf->sgf |= 0x2;
1184
1185 iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
1186 iwl_conf->max_amsdu_size =
1187 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
1188
1189 iwl_conf->supported_chan_width =
1190 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
1191 iwl_conf->extension_chan_offset =
1192 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
1193 /* If no above or below channel supplied disable FAT channel */
1194 if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
1195 iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
1196 iwl_conf->supported_chan_width = 0;
1197
1198 iwl_conf->tx_mimo_ps_mode =
1199 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1200 memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
1201
1202 iwl_conf->control_channel = ht_bss_conf->primary_channel;
1203 iwl_conf->tx_chan_width =
1204 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
1205 iwl_conf->ht_protection =
1206 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
1207 iwl_conf->non_GF_STA_present =
1208 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
1209
1210 IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1211 IWL_DEBUG_MAC80211("leave\n");
1212 }
1213
1214 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1215 u8 *pos, int *left)
1216 {
1217 struct ieee80211_ht_cap *ht_cap;
1218
1219 if (!sband || !sband->ht_info.ht_supported)
1220 return;
1221
1222 if (*left < sizeof(struct ieee80211_ht_cap))
1223 return;
1224
1225 *pos++ = sizeof(struct ieee80211_ht_cap);
1226 ht_cap = (struct ieee80211_ht_cap *) pos;
1227
1228 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1229 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1230 ht_cap->ampdu_params_info =
1231 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1232 ((sband->ht_info.ampdu_density << 2) &
1233 IEEE80211_HT_CAP_AMPDU_DENSITY);
1234 *left -= sizeof(struct ieee80211_ht_cap);
1235 }
1236 #else
1237 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1238 struct ieee80211_bss_conf *bss_conf)
1239 {
1240 }
1241 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1242 u8 *pos, int *left)
1243 {
1244 }
1245 #endif
1246
1247
1248 /**
1249 * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1250 */
1251 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1252 enum ieee80211_band band,
1253 struct ieee80211_mgmt *frame,
1254 int left, int is_direct)
1255 {
1256 int len = 0;
1257 u8 *pos = NULL;
1258 u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1259 const struct ieee80211_supported_band *sband =
1260 iwl_get_hw_mode(priv, band);
1261
1262 /* Make sure there is enough space for the probe request,
1263 * two mandatory IEs and the data */
1264 left -= 24;
1265 if (left < 0)
1266 return 0;
1267 len += 24;
1268
1269 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1270 memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1271 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1272 memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1273 frame->seq_ctrl = 0;
1274
1275 /* fill in our indirect SSID IE */
1276 /* ...next IE... */
1277
1278 left -= 2;
1279 if (left < 0)
1280 return 0;
1281 len += 2;
1282 pos = &(frame->u.probe_req.variable[0]);
1283 *pos++ = WLAN_EID_SSID;
1284 *pos++ = 0;
1285
1286 /* fill in our direct SSID IE... */
1287 if (is_direct) {
1288 /* ...next IE... */
1289 left -= 2 + priv->essid_len;
1290 if (left < 0)
1291 return 0;
1292 /* ... fill it in... */
1293 *pos++ = WLAN_EID_SSID;
1294 *pos++ = priv->essid_len;
1295 memcpy(pos, priv->essid, priv->essid_len);
1296 pos += priv->essid_len;
1297 len += 2 + priv->essid_len;
1298 }
1299
1300 /* fill in supported rate */
1301 /* ...next IE... */
1302 left -= 2;
1303 if (left < 0)
1304 return 0;
1305
1306 /* ... fill it in... */
1307 *pos++ = WLAN_EID_SUPP_RATES;
1308 *pos = 0;
1309
1310 /* exclude 60M rate */
1311 active_rates = priv->rates_mask;
1312 active_rates &= ~IWL_RATE_60M_MASK;
1313
1314 active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1315
1316 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1317 ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1318 active_rate_basic, &left);
1319 active_rates &= ~ret_rates;
1320
1321 ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1322 active_rate_basic, &left);
1323 active_rates &= ~ret_rates;
1324
1325 len += 2 + *pos;
1326 pos += (*pos) + 1;
1327 if (active_rates == 0)
1328 goto fill_end;
1329
1330 /* fill in supported extended rate */
1331 /* ...next IE... */
1332 left -= 2;
1333 if (left < 0)
1334 return 0;
1335 /* ... fill it in... */
1336 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1337 *pos = 0;
1338 iwl4965_supported_rate_to_ie(pos, active_rates,
1339 active_rate_basic, &left);
1340 if (*pos > 0)
1341 len += 2 + *pos;
1342
1343 fill_end:
1344 /* fill in HT IE */
1345 left -= 2;
1346 if (left < 0)
1347 return 0;
1348
1349 *pos++ = WLAN_EID_HT_CAPABILITY;
1350 *pos = 0;
1351
1352 iwl_ht_cap_to_ie(sband, pos, &left);
1353
1354 if (*pos > 0)
1355 len += 2 + *pos;
1356 return (u16)len;
1357 }
1358
1359 /*
1360 * QoS support
1361 */
1362 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1363 struct iwl4965_qosparam_cmd *qos)
1364 {
1365
1366 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1367 sizeof(struct iwl4965_qosparam_cmd), qos);
1368 }
1369
1370 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1371 {
1372 unsigned long flags;
1373
1374 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1375 return;
1376
1377 if (!priv->qos_data.qos_enable)
1378 return;
1379
1380 spin_lock_irqsave(&priv->lock, flags);
1381 priv->qos_data.def_qos_parm.qos_flags = 0;
1382
1383 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1384 !priv->qos_data.qos_cap.q_AP.txop_request)
1385 priv->qos_data.def_qos_parm.qos_flags |=
1386 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1387 if (priv->qos_data.qos_active)
1388 priv->qos_data.def_qos_parm.qos_flags |=
1389 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1390
1391 #ifdef CONFIG_IWL4965_HT
1392 if (priv->current_ht_config.is_ht)
1393 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1394 #endif /* CONFIG_IWL4965_HT */
1395
1396 spin_unlock_irqrestore(&priv->lock, flags);
1397
1398 if (force || iwl_is_associated(priv)) {
1399 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1400 priv->qos_data.qos_active,
1401 priv->qos_data.def_qos_parm.qos_flags);
1402
1403 iwl4965_send_qos_params_command(priv,
1404 &(priv->qos_data.def_qos_parm));
1405 }
1406 }
1407
1408 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1409 {
1410 /* Filter incoming packets to determine if they are targeted toward
1411 * this network, discarding packets coming from ourselves */
1412 switch (priv->iw_mode) {
1413 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
1414 /* packets from our adapter are dropped (echo) */
1415 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1416 return 0;
1417 /* {broad,multi}cast packets to our IBSS go through */
1418 if (is_multicast_ether_addr(header->addr1))
1419 return !compare_ether_addr(header->addr3, priv->bssid);
1420 /* packets to our adapter go through */
1421 return !compare_ether_addr(header->addr1, priv->mac_addr);
1422 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1423 /* packets from our adapter are dropped (echo) */
1424 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1425 return 0;
1426 /* {broad,multi}cast packets to our BSS go through */
1427 if (is_multicast_ether_addr(header->addr1))
1428 return !compare_ether_addr(header->addr2, priv->bssid);
1429 /* packets to our adapter go through */
1430 return !compare_ether_addr(header->addr1, priv->mac_addr);
1431 default:
1432 break;
1433 }
1434
1435 return 1;
1436 }
1437
1438 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1439
1440 static const char *iwl4965_get_tx_fail_reason(u32 status)
1441 {
1442 switch (status & TX_STATUS_MSK) {
1443 case TX_STATUS_SUCCESS:
1444 return "SUCCESS";
1445 TX_STATUS_ENTRY(SHORT_LIMIT);
1446 TX_STATUS_ENTRY(LONG_LIMIT);
1447 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1448 TX_STATUS_ENTRY(MGMNT_ABORT);
1449 TX_STATUS_ENTRY(NEXT_FRAG);
1450 TX_STATUS_ENTRY(LIFE_EXPIRE);
1451 TX_STATUS_ENTRY(DEST_PS);
1452 TX_STATUS_ENTRY(ABORTED);
1453 TX_STATUS_ENTRY(BT_RETRY);
1454 TX_STATUS_ENTRY(STA_INVALID);
1455 TX_STATUS_ENTRY(FRAG_DROPPED);
1456 TX_STATUS_ENTRY(TID_DISABLE);
1457 TX_STATUS_ENTRY(FRAME_FLUSHED);
1458 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1459 TX_STATUS_ENTRY(TX_LOCKED);
1460 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1461 }
1462
1463 return "UNKNOWN";
1464 }
1465
1466 /**
1467 * iwl4965_scan_cancel - Cancel any currently executing HW scan
1468 *
1469 * NOTE: priv->mutex is not required before calling this function
1470 */
1471 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1472 {
1473 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1474 clear_bit(STATUS_SCANNING, &priv->status);
1475 return 0;
1476 }
1477
1478 if (test_bit(STATUS_SCANNING, &priv->status)) {
1479 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1480 IWL_DEBUG_SCAN("Queuing scan abort.\n");
1481 set_bit(STATUS_SCAN_ABORTING, &priv->status);
1482 queue_work(priv->workqueue, &priv->abort_scan);
1483
1484 } else
1485 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1486
1487 return test_bit(STATUS_SCANNING, &priv->status);
1488 }
1489
1490 return 0;
1491 }
1492
1493 /**
1494 * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1495 * @ms: amount of time to wait (in milliseconds) for scan to abort
1496 *
1497 * NOTE: priv->mutex must be held before calling this function
1498 */
1499 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1500 {
1501 unsigned long now = jiffies;
1502 int ret;
1503
1504 ret = iwl4965_scan_cancel(priv);
1505 if (ret && ms) {
1506 mutex_unlock(&priv->mutex);
1507 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1508 test_bit(STATUS_SCANNING, &priv->status))
1509 msleep(1);
1510 mutex_lock(&priv->mutex);
1511
1512 return test_bit(STATUS_SCANNING, &priv->status);
1513 }
1514
1515 return ret;
1516 }
1517
1518 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1519 {
1520 /* Reset ieee stats */
1521
1522 /* We don't reset the net_device_stats (ieee->stats) on
1523 * re-association */
1524
1525 priv->last_seq_num = -1;
1526 priv->last_frag_num = -1;
1527 priv->last_packet_time = 0;
1528
1529 iwl4965_scan_cancel(priv);
1530 }
1531
1532 #define MAX_UCODE_BEACON_INTERVAL 4096
1533 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
1534
1535 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1536 {
1537 u16 new_val = 0;
1538 u16 beacon_factor = 0;
1539
1540 beacon_factor =
1541 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1542 / MAX_UCODE_BEACON_INTERVAL;
1543 new_val = beacon_val / beacon_factor;
1544
1545 return cpu_to_le16(new_val);
1546 }
1547
1548 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1549 {
1550 u64 interval_tm_unit;
1551 u64 tsf, result;
1552 unsigned long flags;
1553 struct ieee80211_conf *conf = NULL;
1554 u16 beacon_int = 0;
1555
1556 conf = ieee80211_get_hw_conf(priv->hw);
1557
1558 spin_lock_irqsave(&priv->lock, flags);
1559 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1560 priv->rxon_timing.timestamp.dw[0] =
1561 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1562
1563 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1564
1565 tsf = priv->timestamp;
1566
1567 beacon_int = priv->beacon_int;
1568 spin_unlock_irqrestore(&priv->lock, flags);
1569
1570 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1571 if (beacon_int == 0) {
1572 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1573 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1574 } else {
1575 priv->rxon_timing.beacon_interval =
1576 cpu_to_le16(beacon_int);
1577 priv->rxon_timing.beacon_interval =
1578 iwl4965_adjust_beacon_interval(
1579 le16_to_cpu(priv->rxon_timing.beacon_interval));
1580 }
1581
1582 priv->rxon_timing.atim_window = 0;
1583 } else {
1584 priv->rxon_timing.beacon_interval =
1585 iwl4965_adjust_beacon_interval(conf->beacon_int);
1586 /* TODO: we need to get atim_window from upper stack
1587 * for now we set to 0 */
1588 priv->rxon_timing.atim_window = 0;
1589 }
1590
1591 interval_tm_unit =
1592 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1593 result = do_div(tsf, interval_tm_unit);
1594 priv->rxon_timing.beacon_init_val =
1595 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1596
1597 IWL_DEBUG_ASSOC
1598 ("beacon interval %d beacon timer %d beacon tim %d\n",
1599 le16_to_cpu(priv->rxon_timing.beacon_interval),
1600 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1601 le16_to_cpu(priv->rxon_timing.atim_window));
1602 }
1603
1604 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1605 {
1606 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1607 IWL_ERROR("APs don't scan.\n");
1608 return 0;
1609 }
1610
1611 if (!iwl_is_ready_rf(priv)) {
1612 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1613 return -EIO;
1614 }
1615
1616 if (test_bit(STATUS_SCANNING, &priv->status)) {
1617 IWL_DEBUG_SCAN("Scan already in progress.\n");
1618 return -EAGAIN;
1619 }
1620
1621 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1622 IWL_DEBUG_SCAN("Scan request while abort pending. "
1623 "Queuing.\n");
1624 return -EAGAIN;
1625 }
1626
1627 IWL_DEBUG_INFO("Starting scan...\n");
1628 priv->scan_bands = 2;
1629 set_bit(STATUS_SCANNING, &priv->status);
1630 priv->scan_start = jiffies;
1631 priv->scan_pass_start = priv->scan_start;
1632
1633 queue_work(priv->workqueue, &priv->request_scan);
1634
1635 return 0;
1636 }
1637
1638
1639 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1640 enum ieee80211_band band)
1641 {
1642 if (band == IEEE80211_BAND_5GHZ) {
1643 priv->staging_rxon.flags &=
1644 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1645 | RXON_FLG_CCK_MSK);
1646 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1647 } else {
1648 /* Copied from iwl4965_post_associate() */
1649 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1650 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1651 else
1652 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1653
1654 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1655 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1656
1657 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1658 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1659 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1660 }
1661 }
1662
1663 /*
1664 * initialize rxon structure with default values from eeprom
1665 */
1666 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1667 {
1668 const struct iwl_channel_info *ch_info;
1669
1670 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1671
1672 switch (priv->iw_mode) {
1673 case IEEE80211_IF_TYPE_AP:
1674 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1675 break;
1676
1677 case IEEE80211_IF_TYPE_STA:
1678 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1679 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1680 break;
1681
1682 case IEEE80211_IF_TYPE_IBSS:
1683 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1684 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1685 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1686 RXON_FILTER_ACCEPT_GRP_MSK;
1687 break;
1688
1689 case IEEE80211_IF_TYPE_MNTR:
1690 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1691 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1692 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1693 break;
1694 default:
1695 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1696 break;
1697 }
1698
1699 #if 0
1700 /* TODO: Figure out when short_preamble would be set and cache from
1701 * that */
1702 if (!hw_to_local(priv->hw)->short_preamble)
1703 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1704 else
1705 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1706 #endif
1707
1708 ch_info = iwl_get_channel_info(priv, priv->band,
1709 le16_to_cpu(priv->staging_rxon.channel));
1710
1711 if (!ch_info)
1712 ch_info = &priv->channel_info[0];
1713
1714 /*
1715 * in some case A channels are all non IBSS
1716 * in this case force B/G channel
1717 */
1718 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1719 !(is_channel_ibss(ch_info)))
1720 ch_info = &priv->channel_info[0];
1721
1722 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1723 priv->band = ch_info->band;
1724
1725 iwl4965_set_flags_for_phymode(priv, priv->band);
1726
1727 priv->staging_rxon.ofdm_basic_rates =
1728 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1729 priv->staging_rxon.cck_basic_rates =
1730 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1731
1732 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1733 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1734 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1735 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1736 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1737 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1738 iwl_set_rxon_chain(priv);
1739 }
1740
1741 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1742 {
1743 if (mode == IEEE80211_IF_TYPE_IBSS) {
1744 const struct iwl_channel_info *ch_info;
1745
1746 ch_info = iwl_get_channel_info(priv,
1747 priv->band,
1748 le16_to_cpu(priv->staging_rxon.channel));
1749
1750 if (!ch_info || !is_channel_ibss(ch_info)) {
1751 IWL_ERROR("channel %d not IBSS channel\n",
1752 le16_to_cpu(priv->staging_rxon.channel));
1753 return -EINVAL;
1754 }
1755 }
1756
1757 priv->iw_mode = mode;
1758
1759 iwl4965_connection_init_rx_config(priv);
1760 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1761
1762 iwlcore_clear_stations_table(priv);
1763
1764 /* dont commit rxon if rf-kill is on*/
1765 if (!iwl_is_ready_rf(priv))
1766 return -EAGAIN;
1767
1768 cancel_delayed_work(&priv->scan_check);
1769 if (iwl4965_scan_cancel_timeout(priv, 100)) {
1770 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1771 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1772 return -EAGAIN;
1773 }
1774
1775 iwl4965_commit_rxon(priv);
1776
1777 return 0;
1778 }
1779
1780 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1781 struct ieee80211_tx_control *ctl,
1782 struct iwl_cmd *cmd,
1783 struct sk_buff *skb_frag,
1784 int sta_id)
1785 {
1786 struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1787 struct iwl_wep_key *wepkey;
1788 int keyidx = 0;
1789
1790 BUG_ON(ctl->hw_key->hw_key_idx > 3);
1791
1792 switch (keyinfo->alg) {
1793 case ALG_CCMP:
1794 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1795 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1796 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1797 cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1798 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1799 break;
1800
1801 case ALG_TKIP:
1802 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1803 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1804 IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1805 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1806 break;
1807
1808 case ALG_WEP:
1809 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1810 cmd->cmd.tx.sec_ctl = 0;
1811 if (priv->default_wep_key) {
1812 /* the WEP key was sent as static */
1813 keyidx = ctl->hw_key->hw_key_idx;
1814 memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1815 wepkey->key_size);
1816 if (wepkey->key_size == WEP_KEY_LEN_128)
1817 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1818 } else {
1819 /* the WEP key was sent as dynamic */
1820 keyidx = keyinfo->keyidx;
1821 memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1822 keyinfo->keylen);
1823 if (keyinfo->keylen == WEP_KEY_LEN_128)
1824 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1825 }
1826
1827 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1828 (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1829
1830 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1831 "with key %d\n", keyidx);
1832 break;
1833
1834 default:
1835 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1836 break;
1837 }
1838 }
1839
1840 /*
1841 * handle build REPLY_TX command notification.
1842 */
1843 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1844 struct iwl_cmd *cmd,
1845 struct ieee80211_tx_control *ctrl,
1846 struct ieee80211_hdr *hdr,
1847 int is_unicast, u8 std_id)
1848 {
1849 __le16 *qc;
1850 u16 fc = le16_to_cpu(hdr->frame_control);
1851 __le32 tx_flags = cmd->cmd.tx.tx_flags;
1852
1853 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1854 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1855 tx_flags |= TX_CMD_FLG_ACK_MSK;
1856 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1857 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1858 if (ieee80211_is_probe_response(fc) &&
1859 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1860 tx_flags |= TX_CMD_FLG_TSF_MSK;
1861 } else {
1862 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1863 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1864 }
1865
1866 if (ieee80211_is_back_request(fc))
1867 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1868
1869
1870 cmd->cmd.tx.sta_id = std_id;
1871 if (ieee80211_get_morefrag(hdr))
1872 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1873
1874 qc = ieee80211_get_qos_ctrl(hdr);
1875 if (qc) {
1876 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1877 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1878 } else
1879 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1880
1881 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1882 tx_flags |= TX_CMD_FLG_RTS_MSK;
1883 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1884 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1885 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1886 tx_flags |= TX_CMD_FLG_CTS_MSK;
1887 }
1888
1889 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1890 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1891
1892 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1893 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1894 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1895 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1896 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1897 else
1898 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1899 } else {
1900 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1901 }
1902
1903 cmd->cmd.tx.driver_txop = 0;
1904 cmd->cmd.tx.tx_flags = tx_flags;
1905 cmd->cmd.tx.next_frame_len = 0;
1906 }
1907 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1908 {
1909 /* 0 - mgmt, 1 - cnt, 2 - data */
1910 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1911 priv->tx_stats[idx].cnt++;
1912 priv->tx_stats[idx].bytes += len;
1913 }
1914 /**
1915 * iwl4965_get_sta_id - Find station's index within station table
1916 *
1917 * If new IBSS station, create new entry in station table
1918 */
1919 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1920 struct ieee80211_hdr *hdr)
1921 {
1922 int sta_id;
1923 u16 fc = le16_to_cpu(hdr->frame_control);
1924 DECLARE_MAC_BUF(mac);
1925
1926 /* If this frame is broadcast or management, use broadcast station id */
1927 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1928 is_multicast_ether_addr(hdr->addr1))
1929 return priv->hw_params.bcast_sta_id;
1930
1931 switch (priv->iw_mode) {
1932
1933 /* If we are a client station in a BSS network, use the special
1934 * AP station entry (that's the only station we communicate with) */
1935 case IEEE80211_IF_TYPE_STA:
1936 return IWL_AP_ID;
1937
1938 /* If we are an AP, then find the station, or use BCAST */
1939 case IEEE80211_IF_TYPE_AP:
1940 sta_id = iwl_find_station(priv, hdr->addr1);
1941 if (sta_id != IWL_INVALID_STATION)
1942 return sta_id;
1943 return priv->hw_params.bcast_sta_id;
1944
1945 /* If this frame is going out to an IBSS network, find the station,
1946 * or create a new station table entry */
1947 case IEEE80211_IF_TYPE_IBSS:
1948 sta_id = iwl_find_station(priv, hdr->addr1);
1949 if (sta_id != IWL_INVALID_STATION)
1950 return sta_id;
1951
1952 /* Create new station table entry */
1953 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1954 0, CMD_ASYNC, NULL);
1955
1956 if (sta_id != IWL_INVALID_STATION)
1957 return sta_id;
1958
1959 IWL_DEBUG_DROP("Station %s not in station map. "
1960 "Defaulting to broadcast...\n",
1961 print_mac(mac, hdr->addr1));
1962 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1963 return priv->hw_params.bcast_sta_id;
1964
1965 default:
1966 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1967 return priv->hw_params.bcast_sta_id;
1968 }
1969 }
1970
1971 /*
1972 * start REPLY_TX command process
1973 */
1974 static int iwl4965_tx_skb(struct iwl_priv *priv,
1975 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1976 {
1977 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1978 struct iwl4965_tfd_frame *tfd;
1979 u32 *control_flags;
1980 int txq_id = ctl->queue;
1981 struct iwl4965_tx_queue *txq = NULL;
1982 struct iwl4965_queue *q = NULL;
1983 dma_addr_t phys_addr;
1984 dma_addr_t txcmd_phys;
1985 dma_addr_t scratch_phys;
1986 struct iwl_cmd *out_cmd = NULL;
1987 u16 len, idx, len_org;
1988 u8 id, hdr_len, unicast;
1989 u8 sta_id;
1990 u16 seq_number = 0;
1991 u16 fc;
1992 __le16 *qc;
1993 u8 wait_write_ptr = 0;
1994 unsigned long flags;
1995 int rc;
1996
1997 spin_lock_irqsave(&priv->lock, flags);
1998 if (iwl_is_rfkill(priv)) {
1999 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2000 goto drop_unlock;
2001 }
2002
2003 if (!priv->vif) {
2004 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2005 goto drop_unlock;
2006 }
2007
2008 if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2009 IWL_ERROR("ERROR: No TX rate available.\n");
2010 goto drop_unlock;
2011 }
2012
2013 unicast = !is_multicast_ether_addr(hdr->addr1);
2014 id = 0;
2015
2016 fc = le16_to_cpu(hdr->frame_control);
2017
2018 #ifdef CONFIG_IWLWIFI_DEBUG
2019 if (ieee80211_is_auth(fc))
2020 IWL_DEBUG_TX("Sending AUTH frame\n");
2021 else if (ieee80211_is_assoc_request(fc))
2022 IWL_DEBUG_TX("Sending ASSOC frame\n");
2023 else if (ieee80211_is_reassoc_request(fc))
2024 IWL_DEBUG_TX("Sending REASSOC frame\n");
2025 #endif
2026
2027 /* drop all data frame if we are not associated */
2028 if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2029 (!iwl_is_associated(priv) ||
2030 ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2031 !priv->assoc_station_added)) {
2032 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2033 goto drop_unlock;
2034 }
2035
2036 spin_unlock_irqrestore(&priv->lock, flags);
2037
2038 hdr_len = ieee80211_get_hdrlen(fc);
2039
2040 /* Find (or create) index into station table for destination station */
2041 sta_id = iwl4965_get_sta_id(priv, hdr);
2042 if (sta_id == IWL_INVALID_STATION) {
2043 DECLARE_MAC_BUF(mac);
2044
2045 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2046 print_mac(mac, hdr->addr1));
2047 goto drop;
2048 }
2049
2050 IWL_DEBUG_TX("station Id %d\n", sta_id);
2051
2052 qc = ieee80211_get_qos_ctrl(hdr);
2053 if (qc) {
2054 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2055 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2056 IEEE80211_SCTL_SEQ;
2057 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2058 (hdr->seq_ctrl &
2059 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2060 seq_number += 0x10;
2061 #ifdef CONFIG_IWL4965_HT
2062 /* aggregation is on for this <sta,tid> */
2063 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2064 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2065 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2066 #endif /* CONFIG_IWL4965_HT */
2067 }
2068
2069 /* Descriptor for chosen Tx queue */
2070 txq = &priv->txq[txq_id];
2071 q = &txq->q;
2072
2073 spin_lock_irqsave(&priv->lock, flags);
2074
2075 /* Set up first empty TFD within this queue's circular TFD buffer */
2076 tfd = &txq->bd[q->write_ptr];
2077 memset(tfd, 0, sizeof(*tfd));
2078 control_flags = (u32 *) tfd;
2079 idx = get_cmd_index(q, q->write_ptr, 0);
2080
2081 /* Set up driver data for this TFD */
2082 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2083 txq->txb[q->write_ptr].skb[0] = skb;
2084 memcpy(&(txq->txb[q->write_ptr].status.control),
2085 ctl, sizeof(struct ieee80211_tx_control));
2086
2087 /* Set up first empty entry in queue's array of Tx/cmd buffers */
2088 out_cmd = &txq->cmd[idx];
2089 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2090 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2091
2092 /*
2093 * Set up the Tx-command (not MAC!) header.
2094 * Store the chosen Tx queue and TFD index within the sequence field;
2095 * after Tx, uCode's Tx response will return this value so driver can
2096 * locate the frame within the tx queue and do post-tx processing.
2097 */
2098 out_cmd->hdr.cmd = REPLY_TX;
2099 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2100 INDEX_TO_SEQ(q->write_ptr)));
2101
2102 /* Copy MAC header from skb into command buffer */
2103 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2104
2105 /*
2106 * Use the first empty entry in this queue's command buffer array
2107 * to contain the Tx command and MAC header concatenated together
2108 * (payload data will be in another buffer).
2109 * Size of this varies, due to varying MAC header length.
2110 * If end is not dword aligned, we'll have 2 extra bytes at the end
2111 * of the MAC header (device reads on dword boundaries).
2112 * We'll tell device about this padding later.
2113 */
2114 len = priv->hw_params.tx_cmd_len +
2115 sizeof(struct iwl_cmd_header) + hdr_len;
2116
2117 len_org = len;
2118 len = (len + 3) & ~3;
2119
2120 if (len_org != len)
2121 len_org = 1;
2122 else
2123 len_org = 0;
2124
2125 /* Physical address of this Tx command's header (not MAC header!),
2126 * within command buffer array. */
2127 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2128 offsetof(struct iwl_cmd, hdr);
2129
2130 /* Add buffer containing Tx command and MAC(!) header to TFD's
2131 * first entry */
2132 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2133
2134 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2135 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2136
2137 /* Set up TFD's 2nd entry to point directly to remainder of skb,
2138 * if any (802.11 null frames have no payload). */
2139 len = skb->len - hdr_len;
2140 if (len) {
2141 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2142 len, PCI_DMA_TODEVICE);
2143 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2144 }
2145
2146 /* Tell 4965 about any 2-byte padding after MAC header */
2147 if (len_org)
2148 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2149
2150 /* Total # bytes to be transmitted */
2151 len = (u16)skb->len;
2152 out_cmd->cmd.tx.len = cpu_to_le16(len);
2153
2154 /* TODO need this for burst mode later on */
2155 iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2156
2157 /* set is_hcca to 0; it probably will never be implemented */
2158 iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2159
2160 iwl_update_tx_stats(priv, fc, len);
2161
2162 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2163 offsetof(struct iwl4965_tx_cmd, scratch);
2164 out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2165 out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2166
2167 if (!ieee80211_get_morefrag(hdr)) {
2168 txq->need_update = 1;
2169 if (qc) {
2170 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2171 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2172 }
2173 } else {
2174 wait_write_ptr = 1;
2175 txq->need_update = 0;
2176 }
2177
2178 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2179 sizeof(out_cmd->cmd.tx));
2180
2181 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2182 ieee80211_get_hdrlen(fc));
2183
2184 /* Set up entry for this TFD in Tx byte-count array */
2185 priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2186
2187 /* Tell device the write index *just past* this latest filled TFD */
2188 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2189 rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2190 spin_unlock_irqrestore(&priv->lock, flags);
2191
2192 if (rc)
2193 return rc;
2194
2195 if ((iwl4965_queue_space(q) < q->high_mark)
2196 && priv->mac80211_registered) {
2197 if (wait_write_ptr) {
2198 spin_lock_irqsave(&priv->lock, flags);
2199 txq->need_update = 1;
2200 iwl4965_tx_queue_update_write_ptr(priv, txq);
2201 spin_unlock_irqrestore(&priv->lock, flags);
2202 }
2203
2204 ieee80211_stop_queue(priv->hw, ctl->queue);
2205 }
2206
2207 return 0;
2208
2209 drop_unlock:
2210 spin_unlock_irqrestore(&priv->lock, flags);
2211 drop:
2212 return -1;
2213 }
2214
2215 static void iwl4965_set_rate(struct iwl_priv *priv)
2216 {
2217 const struct ieee80211_supported_band *hw = NULL;
2218 struct ieee80211_rate *rate;
2219 int i;
2220
2221 hw = iwl_get_hw_mode(priv, priv->band);
2222 if (!hw) {
2223 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2224 return;
2225 }
2226
2227 priv->active_rate = 0;
2228 priv->active_rate_basic = 0;
2229
2230 for (i = 0; i < hw->n_bitrates; i++) {
2231 rate = &(hw->bitrates[i]);
2232 if (rate->hw_value < IWL_RATE_COUNT)
2233 priv->active_rate |= (1 << rate->hw_value);
2234 }
2235
2236 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2237 priv->active_rate, priv->active_rate_basic);
2238
2239 /*
2240 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2241 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2242 * OFDM
2243 */
2244 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2245 priv->staging_rxon.cck_basic_rates =
2246 ((priv->active_rate_basic &
2247 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2248 else
2249 priv->staging_rxon.cck_basic_rates =
2250 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2251
2252 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2253 priv->staging_rxon.ofdm_basic_rates =
2254 ((priv->active_rate_basic &
2255 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2256 IWL_FIRST_OFDM_RATE) & 0xFF;
2257 else
2258 priv->staging_rxon.ofdm_basic_rates =
2259 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2260 }
2261
2262 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2263 {
2264 unsigned long flags;
2265
2266 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2267 return;
2268
2269 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2270 disable_radio ? "OFF" : "ON");
2271
2272 if (disable_radio) {
2273 iwl4965_scan_cancel(priv);
2274 /* FIXME: This is a workaround for AP */
2275 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2276 spin_lock_irqsave(&priv->lock, flags);
2277 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2278 CSR_UCODE_SW_BIT_RFKILL);
2279 spin_unlock_irqrestore(&priv->lock, flags);
2280 /* call the host command only if no hw rf-kill set */
2281 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2282 iwl_is_ready(priv))
2283 iwl4965_send_card_state(priv,
2284 CARD_STATE_CMD_DISABLE,
2285 0);
2286 set_bit(STATUS_RF_KILL_SW, &priv->status);
2287
2288 /* make sure mac80211 stop sending Tx frame */
2289 if (priv->mac80211_registered)
2290 ieee80211_stop_queues(priv->hw);
2291 }
2292 return;
2293 }
2294
2295 spin_lock_irqsave(&priv->lock, flags);
2296 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2297
2298 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2299 spin_unlock_irqrestore(&priv->lock, flags);
2300
2301 /* wake up ucode */
2302 msleep(10);
2303
2304 spin_lock_irqsave(&priv->lock, flags);
2305 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2306 if (!iwl_grab_nic_access(priv))
2307 iwl_release_nic_access(priv);
2308 spin_unlock_irqrestore(&priv->lock, flags);
2309
2310 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2311 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2312 "disabled by HW switch\n");
2313 return;
2314 }
2315
2316 queue_work(priv->workqueue, &priv->restart);
2317 return;
2318 }
2319
2320 #define IWL_PACKET_RETRY_TIME HZ
2321
2322 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2323 {
2324 u16 sc = le16_to_cpu(header->seq_ctrl);
2325 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2326 u16 frag = sc & IEEE80211_SCTL_FRAG;
2327 u16 *last_seq, *last_frag;
2328 unsigned long *last_time;
2329
2330 switch (priv->iw_mode) {
2331 case IEEE80211_IF_TYPE_IBSS:{
2332 struct list_head *p;
2333 struct iwl4965_ibss_seq *entry = NULL;
2334 u8 *mac = header->addr2;
2335 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2336
2337 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2338 entry = list_entry(p, struct iwl4965_ibss_seq, list);
2339 if (!compare_ether_addr(entry->mac, mac))
2340 break;
2341 }
2342 if (p == &priv->ibss_mac_hash[index]) {
2343 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2344 if (!entry) {
2345 IWL_ERROR("Cannot malloc new mac entry\n");
2346 return 0;
2347 }
2348 memcpy(entry->mac, mac, ETH_ALEN);
2349 entry->seq_num = seq;
2350 entry->frag_num = frag;
2351 entry->packet_time = jiffies;
2352 list_add(&entry->list, &priv->ibss_mac_hash[index]);
2353 return 0;
2354 }
2355 last_seq = &entry->seq_num;
2356 last_frag = &entry->frag_num;
2357 last_time = &entry->packet_time;
2358 break;
2359 }
2360 case IEEE80211_IF_TYPE_STA:
2361 last_seq = &priv->last_seq_num;
2362 last_frag = &priv->last_frag_num;
2363 last_time = &priv->last_packet_time;
2364 break;
2365 default:
2366 return 0;
2367 }
2368 if ((*last_seq == seq) &&
2369 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2370 if (*last_frag == frag)
2371 goto drop;
2372 if (*last_frag + 1 != frag)
2373 /* out-of-order fragment */
2374 goto drop;
2375 } else
2376 *last_seq = seq;
2377
2378 *last_frag = frag;
2379 *last_time = jiffies;
2380 return 0;
2381
2382 drop:
2383 return 1;
2384 }
2385
2386 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2387
2388 #include "iwl-spectrum.h"
2389
2390 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
2391 #define BEACON_TIME_MASK_HIGH 0xFF000000
2392 #define TIME_UNIT 1024
2393
2394 /*
2395 * extended beacon time format
2396 * time in usec will be changed into a 32-bit value in 8:24 format
2397 * the high 1 byte is the beacon counts
2398 * the lower 3 bytes is the time in usec within one beacon interval
2399 */
2400
2401 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2402 {
2403 u32 quot;
2404 u32 rem;
2405 u32 interval = beacon_interval * 1024;
2406
2407 if (!interval || !usec)
2408 return 0;
2409
2410 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2411 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2412
2413 return (quot << 24) + rem;
2414 }
2415
2416 /* base is usually what we get from ucode with each received frame,
2417 * the same as HW timer counter counting down
2418 */
2419
2420 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2421 {
2422 u32 base_low = base & BEACON_TIME_MASK_LOW;
2423 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2424 u32 interval = beacon_interval * TIME_UNIT;
2425 u32 res = (base & BEACON_TIME_MASK_HIGH) +
2426 (addon & BEACON_TIME_MASK_HIGH);
2427
2428 if (base_low > addon_low)
2429 res += base_low - addon_low;
2430 else if (base_low < addon_low) {
2431 res += interval + base_low - addon_low;
2432 res += (1 << 24);
2433 } else
2434 res += (1 << 24);
2435
2436 return cpu_to_le32(res);
2437 }
2438
2439 static int iwl4965_get_measurement(struct iwl_priv *priv,
2440 struct ieee80211_measurement_params *params,
2441 u8 type)
2442 {
2443 struct iwl4965_spectrum_cmd spectrum;
2444 struct iwl4965_rx_packet *res;
2445 struct iwl_host_cmd cmd = {
2446 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2447 .data = (void *)&spectrum,
2448 .meta.flags = CMD_WANT_SKB,
2449 };
2450 u32 add_time = le64_to_cpu(params->start_time);
2451 int rc;
2452 int spectrum_resp_status;
2453 int duration = le16_to_cpu(params->duration);
2454
2455 if (iwl_is_associated(priv))
2456 add_time =
2457 iwl4965_usecs_to_beacons(
2458 le64_to_cpu(params->start_time) - priv->last_tsf,
2459 le16_to_cpu(priv->rxon_timing.beacon_interval));
2460
2461 memset(&spectrum, 0, sizeof(spectrum));
2462
2463 spectrum.channel_count = cpu_to_le16(1);
2464 spectrum.flags =
2465 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2466 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2467 cmd.len = sizeof(spectrum);
2468 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2469
2470 if (iwl_is_associated(priv))
2471 spectrum.start_time =
2472 iwl4965_add_beacon_time(priv->last_beacon_time,
2473 add_time,
2474 le16_to_cpu(priv->rxon_timing.beacon_interval));
2475 else
2476 spectrum.start_time = 0;
2477
2478 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2479 spectrum.channels[0].channel = params->channel;
2480 spectrum.channels[0].type = type;
2481 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2482 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2483 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2484
2485 rc = iwl_send_cmd_sync(priv, &cmd);
2486 if (rc)
2487 return rc;
2488
2489 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2490 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2491 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2492 rc = -EIO;
2493 }
2494
2495 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2496 switch (spectrum_resp_status) {
2497 case 0: /* Command will be handled */
2498 if (res->u.spectrum.id != 0xff) {
2499 IWL_DEBUG_INFO
2500 ("Replaced existing measurement: %d\n",
2501 res->u.spectrum.id);
2502 priv->measurement_status &= ~MEASUREMENT_READY;
2503 }
2504 priv->measurement_status |= MEASUREMENT_ACTIVE;
2505 rc = 0;
2506 break;
2507
2508 case 1: /* Command will not be handled */
2509 rc = -EAGAIN;
2510 break;
2511 }
2512
2513 dev_kfree_skb_any(cmd.meta.u.skb);
2514
2515 return rc;
2516 }
2517 #endif
2518
2519 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2520 struct iwl4965_tx_info *tx_sta)
2521 {
2522
2523 tx_sta->status.ack_signal = 0;
2524 tx_sta->status.excessive_retries = 0;
2525 tx_sta->status.queue_length = 0;
2526 tx_sta->status.queue_number = 0;
2527
2528 if (in_interrupt())
2529 ieee80211_tx_status_irqsafe(priv->hw,
2530 tx_sta->skb[0], &(tx_sta->status));
2531 else
2532 ieee80211_tx_status(priv->hw,
2533 tx_sta->skb[0], &(tx_sta->status));
2534
2535 tx_sta->skb[0] = NULL;
2536 }
2537
2538 /**
2539 * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2540 *
2541 * When FW advances 'R' index, all entries between old and new 'R' index
2542 * need to be reclaimed. As result, some free space forms. If there is
2543 * enough free space (> low mark), wake the stack that feeds us.
2544 */
2545 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2546 {
2547 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2548 struct iwl4965_queue *q = &txq->q;
2549 int nfreed = 0;
2550
2551 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2552 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2553 "is out of range [0-%d] %d %d.\n", txq_id,
2554 index, q->n_bd, q->write_ptr, q->read_ptr);
2555 return 0;
2556 }
2557
2558 for (index = iwl_queue_inc_wrap(index, q->n_bd);
2559 q->read_ptr != index;
2560 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2561 if (txq_id != IWL_CMD_QUEUE_NUM) {
2562 iwl4965_txstatus_to_ieee(priv,
2563 &(txq->txb[txq->q.read_ptr]));
2564 iwl4965_hw_txq_free_tfd(priv, txq);
2565 } else if (nfreed > 1) {
2566 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2567 q->write_ptr, q->read_ptr);
2568 queue_work(priv->workqueue, &priv->restart);
2569 }
2570 nfreed++;
2571 }
2572
2573 /* if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2574 (txq_id != IWL_CMD_QUEUE_NUM) &&
2575 priv->mac80211_registered)
2576 ieee80211_wake_queue(priv->hw, txq_id); */
2577
2578
2579 return nfreed;
2580 }
2581
2582 static int iwl4965_is_tx_success(u32 status)
2583 {
2584 status &= TX_STATUS_MSK;
2585 return (status == TX_STATUS_SUCCESS)
2586 || (status == TX_STATUS_DIRECT_DONE);
2587 }
2588
2589 /******************************************************************************
2590 *
2591 * Generic RX handler implementations
2592 *
2593 ******************************************************************************/
2594 #ifdef CONFIG_IWL4965_HT
2595
2596 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2597 struct ieee80211_hdr *hdr)
2598 {
2599 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2600 return IWL_AP_ID;
2601 else {
2602 u8 *da = ieee80211_get_DA(hdr);
2603 return iwl_find_station(priv, da);
2604 }
2605 }
2606
2607 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2608 struct iwl_priv *priv, int txq_id, int idx)
2609 {
2610 if (priv->txq[txq_id].txb[idx].skb[0])
2611 return (struct ieee80211_hdr *)priv->txq[txq_id].
2612 txb[idx].skb[0]->data;
2613 return NULL;
2614 }
2615
2616 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2617 {
2618 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2619 tx_resp->frame_count);
2620 return le32_to_cpu(*scd_ssn) & MAX_SN;
2621
2622 }
2623
2624 /**
2625 * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2626 */
2627 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2628 struct iwl4965_ht_agg *agg,
2629 struct iwl4965_tx_resp_agg *tx_resp,
2630 u16 start_idx)
2631 {
2632 u16 status;
2633 struct agg_tx_status *frame_status = &tx_resp->status;
2634 struct ieee80211_tx_status *tx_status = NULL;
2635 struct ieee80211_hdr *hdr = NULL;
2636 int i, sh;
2637 int txq_id, idx;
2638 u16 seq;
2639
2640 if (agg->wait_for_ba)
2641 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2642
2643 agg->frame_count = tx_resp->frame_count;
2644 agg->start_idx = start_idx;
2645 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2646 agg->bitmap = 0;
2647
2648 /* # frames attempted by Tx command */
2649 if (agg->frame_count == 1) {
2650 /* Only one frame was attempted; no block-ack will arrive */
2651 status = le16_to_cpu(frame_status[0].status);
2652 seq = le16_to_cpu(frame_status[0].sequence);
2653 idx = SEQ_TO_INDEX(seq);
2654 txq_id = SEQ_TO_QUEUE(seq);
2655
2656 /* FIXME: code repetition */
2657 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2658 agg->frame_count, agg->start_idx, idx);
2659
2660 tx_status = &(priv->txq[txq_id].txb[idx].status);
2661 tx_status->retry_count = tx_resp->failure_frame;
2662 tx_status->queue_number = status & 0xff;
2663 tx_status->queue_length = tx_resp->failure_rts;
2664 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2665 tx_status->flags = iwl4965_is_tx_success(status)?
2666 IEEE80211_TX_STATUS_ACK : 0;
2667 iwl4965_hwrate_to_tx_control(priv,
2668 le32_to_cpu(tx_resp->rate_n_flags),
2669 &tx_status->control);
2670 /* FIXME: code repetition end */
2671
2672 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2673 status & 0xff, tx_resp->failure_frame);
2674 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2675 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2676
2677 agg->wait_for_ba = 0;
2678 } else {
2679 /* Two or more frames were attempted; expect block-ack */
2680 u64 bitmap = 0;
2681 int start = agg->start_idx;
2682
2683 /* Construct bit-map of pending frames within Tx window */
2684 for (i = 0; i < agg->frame_count; i++) {
2685 u16 sc;
2686 status = le16_to_cpu(frame_status[i].status);
2687 seq = le16_to_cpu(frame_status[i].sequence);
2688 idx = SEQ_TO_INDEX(seq);
2689 txq_id = SEQ_TO_QUEUE(seq);
2690
2691 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2692 AGG_TX_STATE_ABORT_MSK))
2693 continue;
2694
2695 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2696 agg->frame_count, txq_id, idx);
2697
2698 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2699
2700 sc = le16_to_cpu(hdr->seq_ctrl);
2701 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2702 IWL_ERROR("BUG_ON idx doesn't match seq control"
2703 " idx=%d, seq_idx=%d, seq=%d\n",
2704 idx, SEQ_TO_SN(sc),
2705 hdr->seq_ctrl);
2706 return -1;
2707 }
2708
2709 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2710 i, idx, SEQ_TO_SN(sc));
2711
2712 sh = idx - start;
2713 if (sh > 64) {
2714 sh = (start - idx) + 0xff;
2715 bitmap = bitmap << sh;
2716 sh = 0;
2717 start = idx;
2718 } else if (sh < -64)
2719 sh = 0xff - (start - idx);
2720 else if (sh < 0) {
2721 sh = start - idx;
2722 start = idx;
2723 bitmap = bitmap << sh;
2724 sh = 0;
2725 }
2726 bitmap |= (1 << sh);
2727 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2728 start, (u32)(bitmap & 0xFFFFFFFF));
2729 }
2730
2731 agg->bitmap = bitmap;
2732 agg->start_idx = start;
2733 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2734 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2735 agg->frame_count, agg->start_idx,
2736 (unsigned long long)agg->bitmap);
2737
2738 if (bitmap)
2739 agg->wait_for_ba = 1;
2740 }
2741 return 0;
2742 }
2743 #endif
2744
2745 /**
2746 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2747 */
2748 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2749 struct iwl4965_rx_mem_buffer *rxb)
2750 {
2751 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2752 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2753 int txq_id = SEQ_TO_QUEUE(sequence);
2754 int index = SEQ_TO_INDEX(sequence);
2755 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2756 struct ieee80211_tx_status *tx_status;
2757 struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2758 u32 status = le32_to_cpu(tx_resp->status);
2759 #ifdef CONFIG_IWL4965_HT
2760 int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2761 struct ieee80211_hdr *hdr;
2762 __le16 *qc;
2763 #endif
2764
2765 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2766 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2767 "is out of range [0-%d] %d %d\n", txq_id,
2768 index, txq->q.n_bd, txq->q.write_ptr,
2769 txq->q.read_ptr);
2770 return;
2771 }
2772
2773 #ifdef CONFIG_IWL4965_HT
2774 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2775 qc = ieee80211_get_qos_ctrl(hdr);
2776
2777 if (qc)
2778 tid = le16_to_cpu(*qc) & 0xf;
2779
2780 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2781 if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2782 IWL_ERROR("Station not known\n");
2783 return;
2784 }
2785
2786 if (txq->sched_retry) {
2787 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2788 struct iwl4965_ht_agg *agg = NULL;
2789
2790 if (!qc)
2791 return;
2792
2793 agg = &priv->stations[sta_id].tid[tid].agg;
2794
2795 iwl4965_tx_status_reply_tx(priv, agg,
2796 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2797
2798 if ((tx_resp->frame_count == 1) &&
2799 !iwl4965_is_tx_success(status)) {
2800 /* TODO: send BAR */
2801 }
2802
2803 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2804 int freed;
2805 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2806 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2807 "%d index %d\n", scd_ssn , index);
2808 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2809 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2810
2811 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2812 txq_id >= 0 && priv->mac80211_registered &&
2813 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2814 ieee80211_wake_queue(priv->hw, txq_id);
2815
2816 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2817 }
2818 } else {
2819 #endif /* CONFIG_IWL4965_HT */
2820 tx_status = &(txq->txb[txq->q.read_ptr].status);
2821
2822 tx_status->retry_count = tx_resp->failure_frame;
2823 tx_status->queue_number = status;
2824 tx_status->queue_length = tx_resp->bt_kill_count;
2825 tx_status->queue_length |= tx_resp->failure_rts;
2826 tx_status->flags =
2827 iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2828 iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2829 &tx_status->control);
2830
2831 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2832 "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2833 status, le32_to_cpu(tx_resp->rate_n_flags),
2834 tx_resp->failure_frame);
2835
2836 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2837 if (index != -1) {
2838 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2839 #ifdef CONFIG_IWL4965_HT
2840 if (tid != MAX_TID_COUNT)
2841 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2842 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2843 (txq_id >= 0) &&
2844 priv->mac80211_registered)
2845 ieee80211_wake_queue(priv->hw, txq_id);
2846 if (tid != MAX_TID_COUNT)
2847 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2848 #endif
2849 }
2850 #ifdef CONFIG_IWL4965_HT
2851 }
2852 #endif /* CONFIG_IWL4965_HT */
2853
2854 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2855 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
2856 }
2857
2858
2859 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2860 struct iwl4965_rx_mem_buffer *rxb)
2861 {
2862 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2863 struct iwl4965_alive_resp *palive;
2864 struct delayed_work *pwork;
2865
2866 palive = &pkt->u.alive_frame;
2867
2868 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2869 "0x%01X 0x%01X\n",
2870 palive->is_valid, palive->ver_type,
2871 palive->ver_subtype);
2872
2873 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2874 IWL_DEBUG_INFO("Initialization Alive received.\n");
2875 memcpy(&priv->card_alive_init,
2876 &pkt->u.alive_frame,
2877 sizeof(struct iwl4965_init_alive_resp));
2878 pwork = &priv->init_alive_start;
2879 } else {
2880 IWL_DEBUG_INFO("Runtime Alive received.\n");
2881 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2882 sizeof(struct iwl4965_alive_resp));
2883 pwork = &priv->alive_start;
2884 }
2885
2886 /* We delay the ALIVE response by 5ms to
2887 * give the HW RF Kill time to activate... */
2888 if (palive->is_valid == UCODE_VALID_OK)
2889 queue_delayed_work(priv->workqueue, pwork,
2890 msecs_to_jiffies(5));
2891 else
2892 IWL_WARNING("uCode did not respond OK.\n");
2893 }
2894
2895 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2896 struct iwl4965_rx_mem_buffer *rxb)
2897 {
2898 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2899
2900 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2901 return;
2902 }
2903
2904 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2905 struct iwl4965_rx_mem_buffer *rxb)
2906 {
2907 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2908
2909 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2910 "seq 0x%04X ser 0x%08X\n",
2911 le32_to_cpu(pkt->u.err_resp.error_type),
2912 get_cmd_string(pkt->u.err_resp.cmd_id),
2913 pkt->u.err_resp.cmd_id,
2914 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2915 le32_to_cpu(pkt->u.err_resp.error_info));
2916 }
2917
2918 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2919
2920 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
2921 {
2922 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2923 struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2924 struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2925 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2926 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2927 rxon->channel = csa->channel;
2928 priv->staging_rxon.channel = csa->channel;
2929 }
2930
2931 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2932 struct iwl4965_rx_mem_buffer *rxb)
2933 {
2934 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2935 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2936 struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2937
2938 if (!report->state) {
2939 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2940 "Spectrum Measure Notification: Start\n");
2941 return;
2942 }
2943
2944 memcpy(&priv->measure_report, report, sizeof(*report));
2945 priv->measurement_status |= MEASUREMENT_READY;
2946 #endif
2947 }
2948
2949 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2950 struct iwl4965_rx_mem_buffer *rxb)
2951 {
2952 #ifdef CONFIG_IWLWIFI_DEBUG
2953 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2954 struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2955 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2956 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2957 #endif
2958 }
2959
2960 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2961 struct iwl4965_rx_mem_buffer *rxb)
2962 {
2963 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2964 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2965 "notification for %s:\n",
2966 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2967 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2968 }
2969
2970 static void iwl4965_bg_beacon_update(struct work_struct *work)
2971 {
2972 struct iwl_priv *priv =
2973 container_of(work, struct iwl_priv, beacon_update);
2974 struct sk_buff *beacon;
2975
2976 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2977 beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2978
2979 if (!beacon) {
2980 IWL_ERROR("update beacon failed\n");
2981 return;
2982 }
2983
2984 mutex_lock(&priv->mutex);
2985 /* new beacon skb is allocated every time; dispose previous.*/
2986 if (priv->ibss_beacon)
2987 dev_kfree_skb(priv->ibss_beacon);
2988
2989 priv->ibss_beacon = beacon;
2990 mutex_unlock(&priv->mutex);
2991
2992 iwl4965_send_beacon_cmd(priv);
2993 }
2994
2995 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2996 struct iwl4965_rx_mem_buffer *rxb)
2997 {
2998 #ifdef CONFIG_IWLWIFI_DEBUG
2999 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3000 struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3001 u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3002
3003 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3004 "tsf %d %d rate %d\n",
3005 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3006 beacon->beacon_notify_hdr.failure_frame,
3007 le32_to_cpu(beacon->ibss_mgr_status),
3008 le32_to_cpu(beacon->high_tsf),
3009 le32_to_cpu(beacon->low_tsf), rate);
3010 #endif
3011
3012 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3013 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3014 queue_work(priv->workqueue, &priv->beacon_update);
3015 }
3016
3017 /* Service response to REPLY_SCAN_CMD (0x80) */
3018 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3019 struct iwl4965_rx_mem_buffer *rxb)
3020 {
3021 #ifdef CONFIG_IWLWIFI_DEBUG
3022 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3023 struct iwl4965_scanreq_notification *notif =
3024 (struct iwl4965_scanreq_notification *)pkt->u.raw;
3025
3026 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3027 #endif
3028 }
3029
3030 /* Service SCAN_START_NOTIFICATION (0x82) */
3031 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3032 struct iwl4965_rx_mem_buffer *rxb)
3033 {
3034 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3035 struct iwl4965_scanstart_notification *notif =
3036 (struct iwl4965_scanstart_notification *)pkt->u.raw;
3037 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3038 IWL_DEBUG_SCAN("Scan start: "
3039 "%d [802.11%s] "
3040 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3041 notif->channel,
3042 notif->band ? "bg" : "a",
3043 notif->tsf_high,
3044 notif->tsf_low, notif->status, notif->beacon_timer);
3045 }
3046
3047 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3048 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3049 struct iwl4965_rx_mem_buffer *rxb)
3050 {
3051 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3052 struct iwl4965_scanresults_notification *notif =
3053 (struct iwl4965_scanresults_notification *)pkt->u.raw;
3054
3055 IWL_DEBUG_SCAN("Scan ch.res: "
3056 "%d [802.11%s] "
3057 "(TSF: 0x%08X:%08X) - %d "
3058 "elapsed=%lu usec (%dms since last)\n",
3059 notif->channel,
3060 notif->band ? "bg" : "a",
3061 le32_to_cpu(notif->tsf_high),
3062 le32_to_cpu(notif->tsf_low),
3063 le32_to_cpu(notif->statistics[0]),
3064 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3065 jiffies_to_msecs(elapsed_jiffies
3066 (priv->last_scan_jiffies, jiffies)));
3067
3068 priv->last_scan_jiffies = jiffies;
3069 priv->next_scan_jiffies = 0;
3070 }
3071
3072 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3073 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3074 struct iwl4965_rx_mem_buffer *rxb)
3075 {
3076 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3077 struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3078
3079 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3080 scan_notif->scanned_channels,
3081 scan_notif->tsf_low,
3082 scan_notif->tsf_high, scan_notif->status);
3083
3084 /* The HW is no longer scanning */
3085 clear_bit(STATUS_SCAN_HW, &priv->status);
3086
3087 /* The scan completion notification came in, so kill that timer... */
3088 cancel_delayed_work(&priv->scan_check);
3089
3090 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3091 (priv->scan_bands == 2) ? "2.4" : "5.2",
3092 jiffies_to_msecs(elapsed_jiffies
3093 (priv->scan_pass_start, jiffies)));
3094
3095 /* Remove this scanned band from the list
3096 * of pending bands to scan */
3097 priv->scan_bands--;
3098
3099 /* If a request to abort was given, or the scan did not succeed
3100 * then we reset the scan state machine and terminate,
3101 * re-queuing another scan if one has been requested */
3102 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3103 IWL_DEBUG_INFO("Aborted scan completed.\n");
3104 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3105 } else {
3106 /* If there are more bands on this scan pass reschedule */
3107 if (priv->scan_bands > 0)
3108 goto reschedule;
3109 }
3110
3111 priv->last_scan_jiffies = jiffies;
3112 priv->next_scan_jiffies = 0;
3113 IWL_DEBUG_INFO("Setting scan to off\n");
3114
3115 clear_bit(STATUS_SCANNING, &priv->status);
3116
3117 IWL_DEBUG_INFO("Scan took %dms\n",
3118 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3119
3120 queue_work(priv->workqueue, &priv->scan_completed);
3121
3122 return;
3123
3124 reschedule:
3125 priv->scan_pass_start = jiffies;
3126 queue_work(priv->workqueue, &priv->request_scan);
3127 }
3128
3129 /* Handle notification from uCode that card's power state is changing
3130 * due to software, hardware, or critical temperature RFKILL */
3131 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3132 struct iwl4965_rx_mem_buffer *rxb)
3133 {
3134 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3135 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3136 unsigned long status = priv->status;
3137
3138 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3139 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3140 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3141
3142 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3143 RF_CARD_DISABLED)) {
3144
3145 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3146 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3147
3148 if (!iwl_grab_nic_access(priv)) {
3149 iwl_write_direct32(
3150 priv, HBUS_TARG_MBX_C,
3151 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3152
3153 iwl_release_nic_access(priv);
3154 }
3155
3156 if (!(flags & RXON_CARD_DISABLED)) {
3157 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3158 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3159 if (!iwl_grab_nic_access(priv)) {
3160 iwl_write_direct32(
3161 priv, HBUS_TARG_MBX_C,
3162 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3163
3164 iwl_release_nic_access(priv);
3165 }
3166 }
3167
3168 if (flags & RF_CARD_DISABLED) {
3169 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3170 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3171 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3172 if (!iwl_grab_nic_access(priv))
3173 iwl_release_nic_access(priv);
3174 }
3175 }
3176
3177 if (flags & HW_CARD_DISABLED)
3178 set_bit(STATUS_RF_KILL_HW, &priv->status);
3179 else
3180 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3181
3182
3183 if (flags & SW_CARD_DISABLED)
3184 set_bit(STATUS_RF_KILL_SW, &priv->status);
3185 else
3186 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3187
3188 if (!(flags & RXON_CARD_DISABLED))
3189 iwl4965_scan_cancel(priv);
3190
3191 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3192 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3193 (test_bit(STATUS_RF_KILL_SW, &status) !=
3194 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3195 queue_work(priv->workqueue, &priv->rf_kill);
3196 else
3197 wake_up_interruptible(&priv->wait_command_queue);
3198 }
3199
3200 /**
3201 * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3202 *
3203 * Setup the RX handlers for each of the reply types sent from the uCode
3204 * to the host.
3205 *
3206 * This function chains into the hardware specific files for them to setup
3207 * any hardware specific handlers as well.
3208 */
3209 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3210 {
3211 priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3212 priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3213 priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3214 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3215 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3216 iwl4965_rx_spectrum_measure_notif;
3217 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3218 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3219 iwl4965_rx_pm_debug_statistics_notif;
3220 priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3221
3222 /*
3223 * The same handler is used for both the REPLY to a discrete
3224 * statistics request from the host as well as for the periodic
3225 * statistics notifications (after received beacons) from the uCode.
3226 */
3227 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3228 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3229
3230 priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3231 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3232 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3233 iwl4965_rx_scan_results_notif;
3234 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3235 iwl4965_rx_scan_complete_notif;
3236 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3237 priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3238
3239 /* Set up hardware specific Rx handlers */
3240 priv->cfg->ops->lib->rx_handler_setup(priv);
3241 }
3242
3243 /**
3244 * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3245 * @rxb: Rx buffer to reclaim
3246 *
3247 * If an Rx buffer has an async callback associated with it the callback
3248 * will be executed. The attached skb (if present) will only be freed
3249 * if the callback returns 1
3250 */
3251 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3252 struct iwl4965_rx_mem_buffer *rxb)
3253 {
3254 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3255 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3256 int txq_id = SEQ_TO_QUEUE(sequence);
3257 int index = SEQ_TO_INDEX(sequence);
3258 int huge = sequence & SEQ_HUGE_FRAME;
3259 int cmd_index;
3260 struct iwl_cmd *cmd;
3261
3262 /* If a Tx command is being handled and it isn't in the actual
3263 * command queue then there a command routing bug has been introduced
3264 * in the queue management code. */
3265 if (txq_id != IWL_CMD_QUEUE_NUM)
3266 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3267 txq_id, pkt->hdr.cmd);
3268 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3269
3270 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3271 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3272
3273 /* Input error checking is done when commands are added to queue. */
3274 if (cmd->meta.flags & CMD_WANT_SKB) {
3275 cmd->meta.source->u.skb = rxb->skb;
3276 rxb->skb = NULL;
3277 } else if (cmd->meta.u.callback &&
3278 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3279 rxb->skb = NULL;
3280
3281 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3282
3283 if (!(cmd->meta.flags & CMD_ASYNC)) {
3284 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3285 wake_up_interruptible(&priv->wait_command_queue);
3286 }
3287 }
3288
3289 /************************** RX-FUNCTIONS ****************************/
3290 /*
3291 * Rx theory of operation
3292 *
3293 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3294 * each of which point to Receive Buffers to be filled by 4965. These get
3295 * used not only for Rx frames, but for any command response or notification
3296 * from the 4965. The driver and 4965 manage the Rx buffers by means
3297 * of indexes into the circular buffer.
3298 *
3299 * Rx Queue Indexes
3300 * The host/firmware share two index registers for managing the Rx buffers.
3301 *
3302 * The READ index maps to the first position that the firmware may be writing
3303 * to -- the driver can read up to (but not including) this position and get
3304 * good data.
3305 * The READ index is managed by the firmware once the card is enabled.
3306 *
3307 * The WRITE index maps to the last position the driver has read from -- the
3308 * position preceding WRITE is the last slot the firmware can place a packet.
3309 *
3310 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3311 * WRITE = READ.
3312 *
3313 * During initialization, the host sets up the READ queue position to the first
3314 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3315 *
3316 * When the firmware places a packet in a buffer, it will advance the READ index
3317 * and fire the RX interrupt. The driver can then query the READ index and
3318 * process as many packets as possible, moving the WRITE index forward as it
3319 * resets the Rx queue buffers with new memory.
3320 *
3321 * The management in the driver is as follows:
3322 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3323 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3324 * to replenish the iwl->rxq->rx_free.
3325 * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3326 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3327 * 'processed' and 'read' driver indexes as well)
3328 * + A received packet is processed and handed to the kernel network stack,
3329 * detached from the iwl->rxq. The driver 'processed' index is updated.
3330 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3331 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3332 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3333 * were enough free buffers and RX_STALLED is set it is cleared.
3334 *
3335 *
3336 * Driver sequence:
3337 *
3338 * iwl4965_rx_queue_alloc() Allocates rx_free
3339 * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
3340 * iwl4965_rx_queue_restock
3341 * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3342 * queue, updates firmware pointers, and updates
3343 * the WRITE index. If insufficient rx_free buffers
3344 * are available, schedules iwl4965_rx_replenish
3345 *
3346 * -- enable interrupts --
3347 * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
3348 * READ INDEX, detaching the SKB from the pool.
3349 * Moves the packet buffer from queue to rx_used.
3350 * Calls iwl4965_rx_queue_restock to refill any empty
3351 * slots.
3352 * ...
3353 *
3354 */
3355
3356 /**
3357 * iwl4965_rx_queue_space - Return number of free slots available in queue.
3358 */
3359 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3360 {
3361 int s = q->read - q->write;
3362 if (s <= 0)
3363 s += RX_QUEUE_SIZE;
3364 /* keep some buffer to not confuse full and empty queue */
3365 s -= 2;
3366 if (s < 0)
3367 s = 0;
3368 return s;
3369 }
3370
3371 /**
3372 * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3373 */
3374 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3375 {
3376 u32 reg = 0;
3377 int rc = 0;
3378 unsigned long flags;
3379
3380 spin_lock_irqsave(&q->lock, flags);
3381
3382 if (q->need_update == 0)
3383 goto exit_unlock;
3384
3385 /* If power-saving is in use, make sure device is awake */
3386 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3387 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3388
3389 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3390 iwl_set_bit(priv, CSR_GP_CNTRL,
3391 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3392 goto exit_unlock;
3393 }
3394
3395 rc = iwl_grab_nic_access(priv);
3396 if (rc)
3397 goto exit_unlock;
3398
3399 /* Device expects a multiple of 8 */
3400 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3401 q->write & ~0x7);
3402 iwl_release_nic_access(priv);
3403
3404 /* Else device is assumed to be awake */
3405 } else
3406 /* Device expects a multiple of 8 */
3407 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3408
3409
3410 q->need_update = 0;
3411
3412 exit_unlock:
3413 spin_unlock_irqrestore(&q->lock, flags);
3414 return rc;
3415 }
3416
3417 /**
3418 * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3419 */
3420 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3421 dma_addr_t dma_addr)
3422 {
3423 return cpu_to_le32((u32)(dma_addr >> 8));
3424 }
3425
3426
3427 /**
3428 * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3429 *
3430 * If there are slots in the RX queue that need to be restocked,
3431 * and we have free pre-allocated buffers, fill the ranks as much
3432 * as we can, pulling from rx_free.
3433 *
3434 * This moves the 'write' index forward to catch up with 'processed', and
3435 * also updates the memory address in the firmware to reference the new
3436 * target buffer.
3437 */
3438 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3439 {
3440 struct iwl4965_rx_queue *rxq = &priv->rxq;
3441 struct list_head *element;
3442 struct iwl4965_rx_mem_buffer *rxb;
3443 unsigned long flags;
3444 int write, rc;
3445
3446 spin_lock_irqsave(&rxq->lock, flags);
3447 write = rxq->write & ~0x7;
3448 while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3449 /* Get next free Rx buffer, remove from free list */
3450 element = rxq->rx_free.next;
3451 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3452 list_del(element);
3453
3454 /* Point to Rx buffer via next RBD in circular buffer */
3455 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3456 rxq->queue[rxq->write] = rxb;
3457 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3458 rxq->free_count--;
3459 }
3460 spin_unlock_irqrestore(&rxq->lock, flags);
3461 /* If the pre-allocated buffer pool is dropping low, schedule to
3462 * refill it */
3463 if (rxq->free_count <= RX_LOW_WATERMARK)
3464 queue_work(priv->workqueue, &priv->rx_replenish);
3465
3466
3467 /* If we've added more space for the firmware to place data, tell it.
3468 * Increment device's write pointer in multiples of 8. */
3469 if ((write != (rxq->write & ~0x7))
3470 || (abs(rxq->write - rxq->read) > 7)) {
3471 spin_lock_irqsave(&rxq->lock, flags);
3472 rxq->need_update = 1;
3473 spin_unlock_irqrestore(&rxq->lock, flags);
3474 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3475 if (rc)
3476 return rc;
3477 }
3478
3479 return 0;
3480 }
3481
3482 /**
3483 * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3484 *
3485 * When moving to rx_free an SKB is allocated for the slot.
3486 *
3487 * Also restock the Rx queue via iwl4965_rx_queue_restock.
3488 * This is called as a scheduled work item (except for during initialization)
3489 */
3490 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3491 {
3492 struct iwl4965_rx_queue *rxq = &priv->rxq;
3493 struct list_head *element;
3494 struct iwl4965_rx_mem_buffer *rxb;
3495 unsigned long flags;
3496 spin_lock_irqsave(&rxq->lock, flags);
3497 while (!list_empty(&rxq->rx_used)) {
3498 element = rxq->rx_used.next;
3499 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3500
3501 /* Alloc a new receive buffer */
3502 rxb->skb =
3503 alloc_skb(priv->hw_params.rx_buf_size,
3504 __GFP_NOWARN | GFP_ATOMIC);
3505 if (!rxb->skb) {
3506 if (net_ratelimit())
3507 printk(KERN_CRIT DRV_NAME
3508 ": Can not allocate SKB buffers\n");
3509 /* We don't reschedule replenish work here -- we will
3510 * call the restock method and if it still needs
3511 * more buffers it will schedule replenish */
3512 break;
3513 }
3514 priv->alloc_rxb_skb++;
3515 list_del(element);
3516
3517 /* Get physical address of RB/SKB */
3518 rxb->dma_addr =
3519 pci_map_single(priv->pci_dev, rxb->skb->data,
3520 priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3521 list_add_tail(&rxb->list, &rxq->rx_free);
3522 rxq->free_count++;
3523 }
3524 spin_unlock_irqrestore(&rxq->lock, flags);
3525 }
3526
3527 /*
3528 * this should be called while priv->lock is locked
3529 */
3530 static void __iwl4965_rx_replenish(void *data)
3531 {
3532 struct iwl_priv *priv = data;
3533
3534 iwl4965_rx_allocate(priv);
3535 iwl4965_rx_queue_restock(priv);
3536 }
3537
3538
3539 void iwl4965_rx_replenish(void *data)
3540 {
3541 struct iwl_priv *priv = data;
3542 unsigned long flags;
3543
3544 iwl4965_rx_allocate(priv);
3545
3546 spin_lock_irqsave(&priv->lock, flags);
3547 iwl4965_rx_queue_restock(priv);
3548 spin_unlock_irqrestore(&priv->lock, flags);
3549 }
3550
3551 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3552 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3553 * This free routine walks the list of POOL entries and if SKB is set to
3554 * non NULL it is unmapped and freed
3555 */
3556 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3557 {
3558 int i;
3559 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3560 if (rxq->pool[i].skb != NULL) {
3561 pci_unmap_single(priv->pci_dev,
3562 rxq->pool[i].dma_addr,
3563 priv->hw_params.rx_buf_size,
3564 PCI_DMA_FROMDEVICE);
3565 dev_kfree_skb(rxq->pool[i].skb);
3566 }
3567 }
3568
3569 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3570 rxq->dma_addr);
3571 rxq->bd = NULL;
3572 }
3573
3574 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3575 {
3576 struct iwl4965_rx_queue *rxq = &priv->rxq;
3577 struct pci_dev *dev = priv->pci_dev;
3578 int i;
3579
3580 spin_lock_init(&rxq->lock);
3581 INIT_LIST_HEAD(&rxq->rx_free);
3582 INIT_LIST_HEAD(&rxq->rx_used);
3583
3584 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3585 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3586 if (!rxq->bd)
3587 return -ENOMEM;
3588
3589 /* Fill the rx_used queue with _all_ of the Rx buffers */
3590 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3591 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3592
3593 /* Set us so that we have processed and used all buffers, but have
3594 * not restocked the Rx queue with fresh buffers */
3595 rxq->read = rxq->write = 0;
3596 rxq->free_count = 0;
3597 rxq->need_update = 0;
3598 return 0;
3599 }
3600
3601 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3602 {
3603 unsigned long flags;
3604 int i;
3605 spin_lock_irqsave(&rxq->lock, flags);
3606 INIT_LIST_HEAD(&rxq->rx_free);
3607 INIT_LIST_HEAD(&rxq->rx_used);
3608 /* Fill the rx_used queue with _all_ of the Rx buffers */
3609 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3610 /* In the reset function, these buffers may have been allocated
3611 * to an SKB, so we need to unmap and free potential storage */
3612 if (rxq->pool[i].skb != NULL) {
3613 pci_unmap_single(priv->pci_dev,
3614 rxq->pool[i].dma_addr,
3615 priv->hw_params.rx_buf_size,
3616 PCI_DMA_FROMDEVICE);
3617 priv->alloc_rxb_skb--;
3618 dev_kfree_skb(rxq->pool[i].skb);
3619 rxq->pool[i].skb = NULL;
3620 }
3621 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3622 }
3623
3624 /* Set us so that we have processed and used all buffers, but have
3625 * not restocked the Rx queue with fresh buffers */
3626 rxq->read = rxq->write = 0;
3627 rxq->free_count = 0;
3628 spin_unlock_irqrestore(&rxq->lock, flags);
3629 }
3630
3631 /* Convert linear signal-to-noise ratio into dB */
3632 static u8 ratio2dB[100] = {
3633 /* 0 1 2 3 4 5 6 7 8 9 */
3634 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3635 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3636 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3637 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3638 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3639 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3640 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3641 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3642 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3643 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
3644 };
3645
3646 /* Calculates a relative dB value from a ratio of linear
3647 * (i.e. not dB) signal levels.
3648 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3649 int iwl4965_calc_db_from_ratio(int sig_ratio)
3650 {
3651 /* 1000:1 or higher just report as 60 dB */
3652 if (sig_ratio >= 1000)
3653 return 60;
3654
3655 /* 100:1 or higher, divide by 10 and use table,
3656 * add 20 dB to make up for divide by 10 */
3657 if (sig_ratio >= 100)
3658 return (20 + (int)ratio2dB[sig_ratio/10]);
3659
3660 /* We shouldn't see this */
3661 if (sig_ratio < 1)
3662 return 0;
3663
3664 /* Use table for ratios 1:1 - 99:1 */
3665 return (int)ratio2dB[sig_ratio];
3666 }
3667
3668 #define PERFECT_RSSI (-20) /* dBm */
3669 #define WORST_RSSI (-95) /* dBm */
3670 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3671
3672 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3673 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3674 * about formulas used below. */
3675 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3676 {
3677 int sig_qual;
3678 int degradation = PERFECT_RSSI - rssi_dbm;
3679
3680 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3681 * as indicator; formula is (signal dbm - noise dbm).
3682 * SNR at or above 40 is a great signal (100%).
3683 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3684 * Weakest usable signal is usually 10 - 15 dB SNR. */
3685 if (noise_dbm) {
3686 if (rssi_dbm - noise_dbm >= 40)
3687 return 100;
3688 else if (rssi_dbm < noise_dbm)
3689 return 0;
3690 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3691
3692 /* Else use just the signal level.
3693 * This formula is a least squares fit of data points collected and
3694 * compared with a reference system that had a percentage (%) display
3695 * for signal quality. */
3696 } else
3697 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3698 (15 * RSSI_RANGE + 62 * degradation)) /
3699 (RSSI_RANGE * RSSI_RANGE);
3700
3701 if (sig_qual > 100)
3702 sig_qual = 100;
3703 else if (sig_qual < 1)
3704 sig_qual = 0;
3705
3706 return sig_qual;
3707 }
3708
3709 /**
3710 * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3711 *
3712 * Uses the priv->rx_handlers callback function array to invoke
3713 * the appropriate handlers, including command responses,
3714 * frame-received notifications, and other notifications.
3715 */
3716 static void iwl4965_rx_handle(struct iwl_priv *priv)
3717 {
3718 struct iwl4965_rx_mem_buffer *rxb;
3719 struct iwl4965_rx_packet *pkt;
3720 struct iwl4965_rx_queue *rxq = &priv->rxq;
3721 u32 r, i;
3722 int reclaim;
3723 unsigned long flags;
3724 u8 fill_rx = 0;
3725 u32 count = 8;
3726
3727 /* uCode's read index (stored in shared DRAM) indicates the last Rx
3728 * buffer that the driver may process (last buffer filled by ucode). */
3729 r = iwl4965_hw_get_rx_read(priv);
3730 i = rxq->read;
3731
3732 /* Rx interrupt, but nothing sent from uCode */
3733 if (i == r)
3734 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3735
3736 if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3737 fill_rx = 1;
3738
3739 while (i != r) {
3740 rxb = rxq->queue[i];
3741
3742 /* If an RXB doesn't have a Rx queue slot associated with it,
3743 * then a bug has been introduced in the queue refilling
3744 * routines -- catch it here */
3745 BUG_ON(rxb == NULL);
3746
3747 rxq->queue[i] = NULL;
3748
3749 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3750 priv->hw_params.rx_buf_size,
3751 PCI_DMA_FROMDEVICE);
3752 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3753
3754 /* Reclaim a command buffer only if this packet is a response
3755 * to a (driver-originated) command.
3756 * If the packet (e.g. Rx frame) originated from uCode,
3757 * there is no command buffer to reclaim.
3758 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3759 * but apparently a few don't get set; catch them here. */
3760 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3761 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3762 (pkt->hdr.cmd != REPLY_RX) &&
3763 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3764 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3765 (pkt->hdr.cmd != REPLY_TX);
3766
3767 /* Based on type of command response or notification,
3768 * handle those that need handling via function in
3769 * rx_handlers table. See iwl4965_setup_rx_handlers() */
3770 if (priv->rx_handlers[pkt->hdr.cmd]) {
3771 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3772 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3773 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3774 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3775 } else {
3776 /* No handling needed */
3777 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3778 "r %d i %d No handler needed for %s, 0x%02x\n",
3779 r, i, get_cmd_string(pkt->hdr.cmd),
3780 pkt->hdr.cmd);
3781 }
3782
3783 if (reclaim) {
3784 /* Invoke any callbacks, transfer the skb to caller, and
3785 * fire off the (possibly) blocking iwl_send_cmd()
3786 * as we reclaim the driver command queue */
3787 if (rxb && rxb->skb)
3788 iwl4965_tx_cmd_complete(priv, rxb);
3789 else
3790 IWL_WARNING("Claim null rxb?\n");
3791 }
3792
3793 /* For now we just don't re-use anything. We can tweak this
3794 * later to try and re-use notification packets and SKBs that
3795 * fail to Rx correctly */
3796 if (rxb->skb != NULL) {
3797 priv->alloc_rxb_skb--;
3798 dev_kfree_skb_any(rxb->skb);
3799 rxb->skb = NULL;
3800 }
3801
3802 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3803 priv->hw_params.rx_buf_size,
3804 PCI_DMA_FROMDEVICE);
3805 spin_lock_irqsave(&rxq->lock, flags);
3806 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3807 spin_unlock_irqrestore(&rxq->lock, flags);
3808 i = (i + 1) & RX_QUEUE_MASK;
3809 /* If there are a lot of unused frames,
3810 * restock the Rx queue so ucode wont assert. */
3811 if (fill_rx) {
3812 count++;
3813 if (count >= 8) {
3814 priv->rxq.read = i;
3815 __iwl4965_rx_replenish(priv);
3816 count = 0;
3817 }
3818 }
3819 }
3820
3821 /* Backtrack one entry */
3822 priv->rxq.read = i;
3823 iwl4965_rx_queue_restock(priv);
3824 }
3825
3826 /**
3827 * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3828 */
3829 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3830 struct iwl4965_tx_queue *txq)
3831 {
3832 u32 reg = 0;
3833 int rc = 0;
3834 int txq_id = txq->q.id;
3835
3836 if (txq->need_update == 0)
3837 return rc;
3838
3839 /* if we're trying to save power */
3840 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3841 /* wake up nic if it's powered down ...
3842 * uCode will wake up, and interrupt us again, so next
3843 * time we'll skip this part. */
3844 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3845
3846 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3847 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3848 iwl_set_bit(priv, CSR_GP_CNTRL,
3849 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3850 return rc;
3851 }
3852
3853 /* restore this queue's parameters in nic hardware. */
3854 rc = iwl_grab_nic_access(priv);
3855 if (rc)
3856 return rc;
3857 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3858 txq->q.write_ptr | (txq_id << 8));
3859 iwl_release_nic_access(priv);
3860
3861 /* else not in power-save mode, uCode will never sleep when we're
3862 * trying to tx (during RFKILL, we're not trying to tx). */
3863 } else
3864 iwl_write32(priv, HBUS_TARG_WRPTR,
3865 txq->q.write_ptr | (txq_id << 8));
3866
3867 txq->need_update = 0;
3868
3869 return rc;
3870 }
3871
3872 #ifdef CONFIG_IWLWIFI_DEBUG
3873 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3874 {
3875 DECLARE_MAC_BUF(mac);
3876
3877 IWL_DEBUG_RADIO("RX CONFIG:\n");
3878 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3879 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3880 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3881 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3882 le32_to_cpu(rxon->filter_flags));
3883 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3884 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3885 rxon->ofdm_basic_rates);
3886 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3887 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3888 print_mac(mac, rxon->node_addr));
3889 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3890 print_mac(mac, rxon->bssid_addr));
3891 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3892 }
3893 #endif
3894
3895 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3896 {
3897 IWL_DEBUG_ISR("Enabling interrupts\n");
3898 set_bit(STATUS_INT_ENABLED, &priv->status);
3899 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3900 }
3901
3902 /* call this function to flush any scheduled tasklet */
3903 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3904 {
3905 /* wait to make sure we flush pedding tasklet*/
3906 synchronize_irq(priv->pci_dev->irq);
3907 tasklet_kill(&priv->irq_tasklet);
3908 }
3909
3910 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3911 {
3912 clear_bit(STATUS_INT_ENABLED, &priv->status);
3913
3914 /* disable interrupts from uCode/NIC to host */
3915 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3916
3917 /* acknowledge/clear/reset any interrupts still pending
3918 * from uCode or flow handler (Rx/Tx DMA) */
3919 iwl_write32(priv, CSR_INT, 0xffffffff);
3920 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3921 IWL_DEBUG_ISR("Disabled interrupts\n");
3922 }
3923
3924 static const char *desc_lookup(int i)
3925 {
3926 switch (i) {
3927 case 1:
3928 return "FAIL";
3929 case 2:
3930 return "BAD_PARAM";
3931 case 3:
3932 return "BAD_CHECKSUM";
3933 case 4:
3934 return "NMI_INTERRUPT";
3935 case 5:
3936 return "SYSASSERT";
3937 case 6:
3938 return "FATAL_ERROR";
3939 }
3940
3941 return "UNKNOWN";
3942 }
3943
3944 #define ERROR_START_OFFSET (1 * sizeof(u32))
3945 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
3946
3947 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3948 {
3949 u32 data2, line;
3950 u32 desc, time, count, base, data1;
3951 u32 blink1, blink2, ilink1, ilink2;
3952 int rc;
3953
3954 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3955
3956 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3957 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3958 return;
3959 }
3960
3961 rc = iwl_grab_nic_access(priv);
3962 if (rc) {
3963 IWL_WARNING("Can not read from adapter at this time.\n");
3964 return;
3965 }
3966
3967 count = iwl_read_targ_mem(priv, base);
3968
3969 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3970 IWL_ERROR("Start IWL Error Log Dump:\n");
3971 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3972 }
3973
3974 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3975 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3976 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3977 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3978 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3979 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3980 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3981 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3982 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3983
3984 IWL_ERROR("Desc Time "
3985 "data1 data2 line\n");
3986 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3987 desc_lookup(desc), desc, time, data1, data2, line);
3988 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
3989 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3990 ilink1, ilink2);
3991
3992 iwl_release_nic_access(priv);
3993 }
3994
3995 #define EVENT_START_OFFSET (4 * sizeof(u32))
3996
3997 /**
3998 * iwl4965_print_event_log - Dump error event log to syslog
3999 *
4000 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4001 */
4002 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4003 u32 num_events, u32 mode)
4004 {
4005 u32 i;
4006 u32 base; /* SRAM byte address of event log header */
4007 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4008 u32 ptr; /* SRAM byte address of log data */
4009 u32 ev, time, data; /* event log data */
4010
4011 if (num_events == 0)
4012 return;
4013
4014 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4015
4016 if (mode == 0)
4017 event_size = 2 * sizeof(u32);
4018 else
4019 event_size = 3 * sizeof(u32);
4020
4021 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4022
4023 /* "time" is actually "data" for mode 0 (no timestamp).
4024 * place event id # at far right for easier visual parsing. */
4025 for (i = 0; i < num_events; i++) {
4026 ev = iwl_read_targ_mem(priv, ptr);
4027 ptr += sizeof(u32);
4028 time = iwl_read_targ_mem(priv, ptr);
4029 ptr += sizeof(u32);
4030 if (mode == 0)
4031 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4032 else {
4033 data = iwl_read_targ_mem(priv, ptr);
4034 ptr += sizeof(u32);
4035 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4036 }
4037 }
4038 }
4039
4040 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4041 {
4042 int rc;
4043 u32 base; /* SRAM byte address of event log header */
4044 u32 capacity; /* event log capacity in # entries */
4045 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4046 u32 num_wraps; /* # times uCode wrapped to top of log */
4047 u32 next_entry; /* index of next entry to be written by uCode */
4048 u32 size; /* # entries that we'll print */
4049
4050 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4051 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4052 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4053 return;
4054 }
4055
4056 rc = iwl_grab_nic_access(priv);
4057 if (rc) {
4058 IWL_WARNING("Can not read from adapter at this time.\n");
4059 return;
4060 }
4061
4062 /* event log header */
4063 capacity = iwl_read_targ_mem(priv, base);
4064 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4065 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4066 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4067
4068 size = num_wraps ? capacity : next_entry;
4069
4070 /* bail out if nothing in log */
4071 if (size == 0) {
4072 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4073 iwl_release_nic_access(priv);
4074 return;
4075 }
4076
4077 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4078 size, num_wraps);
4079
4080 /* if uCode has wrapped back to top of log, start at the oldest entry,
4081 * i.e the next one that uCode would fill. */
4082 if (num_wraps)
4083 iwl4965_print_event_log(priv, next_entry,
4084 capacity - next_entry, mode);
4085
4086 /* (then/else) start at top of log */
4087 iwl4965_print_event_log(priv, 0, next_entry, mode);
4088
4089 iwl_release_nic_access(priv);
4090 }
4091
4092 /**
4093 * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4094 */
4095 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4096 {
4097 /* Set the FW error flag -- cleared on iwl4965_down */
4098 set_bit(STATUS_FW_ERROR, &priv->status);
4099
4100 /* Cancel currently queued command. */
4101 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4102
4103 #ifdef CONFIG_IWLWIFI_DEBUG
4104 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4105 iwl4965_dump_nic_error_log(priv);
4106 iwl4965_dump_nic_event_log(priv);
4107 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4108 }
4109 #endif
4110
4111 wake_up_interruptible(&priv->wait_command_queue);
4112
4113 /* Keep the restart process from trying to send host
4114 * commands by clearing the INIT status bit */
4115 clear_bit(STATUS_READY, &priv->status);
4116
4117 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4118 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4119 "Restarting adapter due to uCode error.\n");
4120
4121 if (iwl_is_associated(priv)) {
4122 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4123 sizeof(priv->recovery_rxon));
4124 priv->error_recovering = 1;
4125 }
4126 queue_work(priv->workqueue, &priv->restart);
4127 }
4128 }
4129
4130 static void iwl4965_error_recovery(struct iwl_priv *priv)
4131 {
4132 unsigned long flags;
4133
4134 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4135 sizeof(priv->staging_rxon));
4136 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4137 iwl4965_commit_rxon(priv);
4138
4139 iwl4965_rxon_add_station(priv, priv->bssid, 1);
4140
4141 spin_lock_irqsave(&priv->lock, flags);
4142 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4143 priv->error_recovering = 0;
4144 spin_unlock_irqrestore(&priv->lock, flags);
4145 }
4146
4147 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4148 {
4149 u32 inta, handled = 0;
4150 u32 inta_fh;
4151 unsigned long flags;
4152 #ifdef CONFIG_IWLWIFI_DEBUG
4153 u32 inta_mask;
4154 #endif
4155
4156 spin_lock_irqsave(&priv->lock, flags);
4157
4158 /* Ack/clear/reset pending uCode interrupts.
4159 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4160 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4161 inta = iwl_read32(priv, CSR_INT);
4162 iwl_write32(priv, CSR_INT, inta);
4163
4164 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4165 * Any new interrupts that happen after this, either while we're
4166 * in this tasklet, or later, will show up in next ISR/tasklet. */
4167 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4168 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4169
4170 #ifdef CONFIG_IWLWIFI_DEBUG
4171 if (iwl_debug_level & IWL_DL_ISR) {
4172 /* just for debug */
4173 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4174 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4175 inta, inta_mask, inta_fh);
4176 }
4177 #endif
4178
4179 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4180 * atomic, make sure that inta covers all the interrupts that
4181 * we've discovered, even if FH interrupt came in just after
4182 * reading CSR_INT. */
4183 if (inta_fh & CSR49_FH_INT_RX_MASK)
4184 inta |= CSR_INT_BIT_FH_RX;
4185 if (inta_fh & CSR49_FH_INT_TX_MASK)
4186 inta |= CSR_INT_BIT_FH_TX;
4187
4188 /* Now service all interrupt bits discovered above. */
4189 if (inta & CSR_INT_BIT_HW_ERR) {
4190 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4191
4192 /* Tell the device to stop sending interrupts */
4193 iwl4965_disable_interrupts(priv);
4194
4195 iwl4965_irq_handle_error(priv);
4196
4197 handled |= CSR_INT_BIT_HW_ERR;
4198
4199 spin_unlock_irqrestore(&priv->lock, flags);
4200
4201 return;
4202 }
4203
4204 #ifdef CONFIG_IWLWIFI_DEBUG
4205 if (iwl_debug_level & (IWL_DL_ISR)) {
4206 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4207 if (inta & CSR_INT_BIT_SCD)
4208 IWL_DEBUG_ISR("Scheduler finished to transmit "
4209 "the frame/frames.\n");
4210
4211 /* Alive notification via Rx interrupt will do the real work */
4212 if (inta & CSR_INT_BIT_ALIVE)
4213 IWL_DEBUG_ISR("Alive interrupt\n");
4214 }
4215 #endif
4216 /* Safely ignore these bits for debug checks below */
4217 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4218
4219 /* HW RF KILL switch toggled */
4220 if (inta & CSR_INT_BIT_RF_KILL) {
4221 int hw_rf_kill = 0;
4222 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4223 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4224 hw_rf_kill = 1;
4225
4226 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4227 "RF_KILL bit toggled to %s.\n",
4228 hw_rf_kill ? "disable radio":"enable radio");
4229
4230 /* Queue restart only if RF_KILL switch was set to "kill"
4231 * when we loaded driver, and is now set to "enable".
4232 * After we're Alive, RF_KILL gets handled by
4233 * iwl4965_rx_card_state_notif() */
4234 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4235 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4236 queue_work(priv->workqueue, &priv->restart);
4237 }
4238
4239 handled |= CSR_INT_BIT_RF_KILL;
4240 }
4241
4242 /* Chip got too hot and stopped itself */
4243 if (inta & CSR_INT_BIT_CT_KILL) {
4244 IWL_ERROR("Microcode CT kill error detected.\n");
4245 handled |= CSR_INT_BIT_CT_KILL;
4246 }
4247
4248 /* Error detected by uCode */
4249 if (inta & CSR_INT_BIT_SW_ERR) {
4250 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4251 inta);
4252 iwl4965_irq_handle_error(priv);
4253 handled |= CSR_INT_BIT_SW_ERR;
4254 }
4255
4256 /* uCode wakes up after power-down sleep */
4257 if (inta & CSR_INT_BIT_WAKEUP) {
4258 IWL_DEBUG_ISR("Wakeup interrupt\n");
4259 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4260 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4261 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4262 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4263 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4264 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4265 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4266
4267 handled |= CSR_INT_BIT_WAKEUP;
4268 }
4269
4270 /* All uCode command responses, including Tx command responses,
4271 * Rx "responses" (frame-received notification), and other
4272 * notifications from uCode come through here*/
4273 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4274 iwl4965_rx_handle(priv);
4275 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4276 }
4277
4278 if (inta & CSR_INT_BIT_FH_TX) {
4279 IWL_DEBUG_ISR("Tx interrupt\n");
4280 handled |= CSR_INT_BIT_FH_TX;
4281 }
4282
4283 if (inta & ~handled)
4284 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4285
4286 if (inta & ~CSR_INI_SET_MASK) {
4287 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4288 inta & ~CSR_INI_SET_MASK);
4289 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4290 }
4291
4292 /* Re-enable all interrupts */
4293 /* only Re-enable if diabled by irq */
4294 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4295 iwl4965_enable_interrupts(priv);
4296
4297 #ifdef CONFIG_IWLWIFI_DEBUG
4298 if (iwl_debug_level & (IWL_DL_ISR)) {
4299 inta = iwl_read32(priv, CSR_INT);
4300 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4301 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4302 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4303 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4304 }
4305 #endif
4306 spin_unlock_irqrestore(&priv->lock, flags);
4307 }
4308
4309 static irqreturn_t iwl4965_isr(int irq, void *data)
4310 {
4311 struct iwl_priv *priv = data;
4312 u32 inta, inta_mask;
4313 u32 inta_fh;
4314 if (!priv)
4315 return IRQ_NONE;
4316
4317 spin_lock(&priv->lock);
4318
4319 /* Disable (but don't clear!) interrupts here to avoid
4320 * back-to-back ISRs and sporadic interrupts from our NIC.
4321 * If we have something to service, the tasklet will re-enable ints.
4322 * If we *don't* have something, we'll re-enable before leaving here. */
4323 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4324 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4325
4326 /* Discover which interrupts are active/pending */
4327 inta = iwl_read32(priv, CSR_INT);
4328 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4329
4330 /* Ignore interrupt if there's nothing in NIC to service.
4331 * This may be due to IRQ shared with another device,
4332 * or due to sporadic interrupts thrown from our NIC. */
4333 if (!inta && !inta_fh) {
4334 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4335 goto none;
4336 }
4337
4338 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4339 /* Hardware disappeared. It might have already raised
4340 * an interrupt */
4341 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4342 goto unplugged;
4343 }
4344
4345 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4346 inta, inta_mask, inta_fh);
4347
4348 inta &= ~CSR_INT_BIT_SCD;
4349
4350 /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4351 if (likely(inta || inta_fh))
4352 tasklet_schedule(&priv->irq_tasklet);
4353
4354 unplugged:
4355 spin_unlock(&priv->lock);
4356 return IRQ_HANDLED;
4357
4358 none:
4359 /* re-enable interrupts here since we don't have anything to service. */
4360 /* only Re-enable if diabled by irq */
4361 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4362 iwl4965_enable_interrupts(priv);
4363 spin_unlock(&priv->lock);
4364 return IRQ_NONE;
4365 }
4366
4367 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4368 * sending probe req. This should be set long enough to hear probe responses
4369 * from more than one AP. */
4370 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
4371 #define IWL_ACTIVE_DWELL_TIME_52 (10)
4372
4373 /* For faster active scanning, scan will move to the next channel if fewer than
4374 * PLCP_QUIET_THRESH packets are heard on this channel within
4375 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
4376 * time if it's a quiet channel (nothing responded to our probe, and there's
4377 * no other traffic).
4378 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4379 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
4380 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
4381
4382 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4383 * Must be set longer than active dwell time.
4384 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4385 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
4386 #define IWL_PASSIVE_DWELL_TIME_52 (10)
4387 #define IWL_PASSIVE_DWELL_BASE (100)
4388 #define IWL_CHANNEL_TUNE_TIME 5
4389
4390 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4391 enum ieee80211_band band)
4392 {
4393 if (band == IEEE80211_BAND_5GHZ)
4394 return IWL_ACTIVE_DWELL_TIME_52;
4395 else
4396 return IWL_ACTIVE_DWELL_TIME_24;
4397 }
4398
4399 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4400 enum ieee80211_band band)
4401 {
4402 u16 active = iwl4965_get_active_dwell_time(priv, band);
4403 u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4404 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4405 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4406
4407 if (iwl_is_associated(priv)) {
4408 /* If we're associated, we clamp the maximum passive
4409 * dwell time to be 98% of the beacon interval (minus
4410 * 2 * channel tune time) */
4411 passive = priv->beacon_int;
4412 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4413 passive = IWL_PASSIVE_DWELL_BASE;
4414 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4415 }
4416
4417 if (passive <= active)
4418 passive = active + 1;
4419
4420 return passive;
4421 }
4422
4423 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4424 enum ieee80211_band band,
4425 u8 is_active, u8 direct_mask,
4426 struct iwl4965_scan_channel *scan_ch)
4427 {
4428 const struct ieee80211_channel *channels = NULL;
4429 const struct ieee80211_supported_band *sband;
4430 const struct iwl_channel_info *ch_info;
4431 u16 passive_dwell = 0;
4432 u16 active_dwell = 0;
4433 int added, i;
4434
4435 sband = iwl_get_hw_mode(priv, band);
4436 if (!sband)
4437 return 0;
4438
4439 channels = sband->channels;
4440
4441 active_dwell = iwl4965_get_active_dwell_time(priv, band);
4442 passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4443
4444 for (i = 0, added = 0; i < sband->n_channels; i++) {
4445 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4446 continue;
4447
4448 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4449
4450 ch_info = iwl_get_channel_info(priv, band,
4451 scan_ch->channel);
4452 if (!is_channel_valid(ch_info)) {
4453 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4454 scan_ch->channel);
4455 continue;
4456 }
4457
4458 if (!is_active || is_channel_passive(ch_info) ||
4459 (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4460 scan_ch->type = 0; /* passive */
4461 else
4462 scan_ch->type = 1; /* active */
4463
4464 if (scan_ch->type & 1)
4465 scan_ch->type |= (direct_mask << 1);
4466
4467 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4468 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4469
4470 /* Set txpower levels to defaults */
4471 scan_ch->tpc.dsp_atten = 110;
4472 /* scan_pwr_info->tpc.dsp_atten; */
4473
4474 /*scan_pwr_info->tpc.tx_gain; */
4475 if (band == IEEE80211_BAND_5GHZ)
4476 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4477 else {
4478 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4479 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4480 * power level:
4481 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4482 */
4483 }
4484
4485 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4486 scan_ch->channel,
4487 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4488 (scan_ch->type & 1) ?
4489 active_dwell : passive_dwell);
4490
4491 scan_ch++;
4492 added++;
4493 }
4494
4495 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4496 return added;
4497 }
4498
4499 /******************************************************************************
4500 *
4501 * uCode download functions
4502 *
4503 ******************************************************************************/
4504
4505 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4506 {
4507 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4508 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4509 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4510 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4511 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4512 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4513 }
4514
4515 static void iwl4965_nic_start(struct iwl_priv *priv)
4516 {
4517 /* Remove all resets to allow NIC to operate */
4518 iwl_write32(priv, CSR_RESET, 0);
4519 }
4520
4521
4522 /**
4523 * iwl4965_read_ucode - Read uCode images from disk file.
4524 *
4525 * Copy into buffers for card to fetch via bus-mastering
4526 */
4527 static int iwl4965_read_ucode(struct iwl_priv *priv)
4528 {
4529 struct iwl4965_ucode *ucode;
4530 int ret;
4531 const struct firmware *ucode_raw;
4532 const char *name = priv->cfg->fw_name;
4533 u8 *src;
4534 size_t len;
4535 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4536
4537 /* Ask kernel firmware_class module to get the boot firmware off disk.
4538 * request_firmware() is synchronous, file is in memory on return. */
4539 ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4540 if (ret < 0) {
4541 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4542 name, ret);
4543 goto error;
4544 }
4545
4546 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4547 name, ucode_raw->size);
4548
4549 /* Make sure that we got at least our header! */
4550 if (ucode_raw->size < sizeof(*ucode)) {
4551 IWL_ERROR("File size way too small!\n");
4552 ret = -EINVAL;
4553 goto err_release;
4554 }
4555
4556 /* Data from ucode file: header followed by uCode images */
4557 ucode = (void *)ucode_raw->data;
4558
4559 ver = le32_to_cpu(ucode->ver);
4560 inst_size = le32_to_cpu(ucode->inst_size);
4561 data_size = le32_to_cpu(ucode->data_size);
4562 init_size = le32_to_cpu(ucode->init_size);
4563 init_data_size = le32_to_cpu(ucode->init_data_size);
4564 boot_size = le32_to_cpu(ucode->boot_size);
4565
4566 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4567 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4568 inst_size);
4569 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4570 data_size);
4571 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4572 init_size);
4573 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4574 init_data_size);
4575 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4576 boot_size);
4577
4578 /* Verify size of file vs. image size info in file's header */
4579 if (ucode_raw->size < sizeof(*ucode) +
4580 inst_size + data_size + init_size +
4581 init_data_size + boot_size) {
4582
4583 IWL_DEBUG_INFO("uCode file size %d too small\n",
4584 (int)ucode_raw->size);
4585 ret = -EINVAL;
4586 goto err_release;
4587 }
4588
4589 /* Verify that uCode images will fit in card's SRAM */
4590 if (inst_size > priv->hw_params.max_inst_size) {
4591 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4592 inst_size);
4593 ret = -EINVAL;
4594 goto err_release;
4595 }
4596
4597 if (data_size > priv->hw_params.max_data_size) {
4598 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4599 data_size);
4600 ret = -EINVAL;
4601 goto err_release;
4602 }
4603 if (init_size > priv->hw_params.max_inst_size) {
4604 IWL_DEBUG_INFO
4605 ("uCode init instr len %d too large to fit in\n",
4606 init_size);
4607 ret = -EINVAL;
4608 goto err_release;
4609 }
4610 if (init_data_size > priv->hw_params.max_data_size) {
4611 IWL_DEBUG_INFO
4612 ("uCode init data len %d too large to fit in\n",
4613 init_data_size);
4614 ret = -EINVAL;
4615 goto err_release;
4616 }
4617 if (boot_size > priv->hw_params.max_bsm_size) {
4618 IWL_DEBUG_INFO
4619 ("uCode boot instr len %d too large to fit in\n",
4620 boot_size);
4621 ret = -EINVAL;
4622 goto err_release;
4623 }
4624
4625 /* Allocate ucode buffers for card's bus-master loading ... */
4626
4627 /* Runtime instructions and 2 copies of data:
4628 * 1) unmodified from disk
4629 * 2) backup cache for save/restore during power-downs */
4630 priv->ucode_code.len = inst_size;
4631 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4632
4633 priv->ucode_data.len = data_size;
4634 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4635
4636 priv->ucode_data_backup.len = data_size;
4637 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4638
4639 /* Initialization instructions and data */
4640 if (init_size && init_data_size) {
4641 priv->ucode_init.len = init_size;
4642 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4643
4644 priv->ucode_init_data.len = init_data_size;
4645 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4646
4647 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4648 goto err_pci_alloc;
4649 }
4650
4651 /* Bootstrap (instructions only, no data) */
4652 if (boot_size) {
4653 priv->ucode_boot.len = boot_size;
4654 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4655
4656 if (!priv->ucode_boot.v_addr)
4657 goto err_pci_alloc;
4658 }
4659
4660 /* Copy images into buffers for card's bus-master reads ... */
4661
4662 /* Runtime instructions (first block of data in file) */
4663 src = &ucode->data[0];
4664 len = priv->ucode_code.len;
4665 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4666 memcpy(priv->ucode_code.v_addr, src, len);
4667 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4668 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4669
4670 /* Runtime data (2nd block)
4671 * NOTE: Copy into backup buffer will be done in iwl4965_up() */
4672 src = &ucode->data[inst_size];
4673 len = priv->ucode_data.len;
4674 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4675 memcpy(priv->ucode_data.v_addr, src, len);
4676 memcpy(priv->ucode_data_backup.v_addr, src, len);
4677
4678 /* Initialization instructions (3rd block) */
4679 if (init_size) {
4680 src = &ucode->data[inst_size + data_size];
4681 len = priv->ucode_init.len;
4682 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4683 len);
4684 memcpy(priv->ucode_init.v_addr, src, len);
4685 }
4686
4687 /* Initialization data (4th block) */
4688 if (init_data_size) {
4689 src = &ucode->data[inst_size + data_size + init_size];
4690 len = priv->ucode_init_data.len;
4691 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4692 len);
4693 memcpy(priv->ucode_init_data.v_addr, src, len);
4694 }
4695
4696 /* Bootstrap instructions (5th block) */
4697 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4698 len = priv->ucode_boot.len;
4699 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4700 memcpy(priv->ucode_boot.v_addr, src, len);
4701
4702 /* We have our copies now, allow OS release its copies */
4703 release_firmware(ucode_raw);
4704 return 0;
4705
4706 err_pci_alloc:
4707 IWL_ERROR("failed to allocate pci memory\n");
4708 ret = -ENOMEM;
4709 iwl4965_dealloc_ucode_pci(priv);
4710
4711 err_release:
4712 release_firmware(ucode_raw);
4713
4714 error:
4715 return ret;
4716 }
4717
4718
4719 /**
4720 * iwl4965_set_ucode_ptrs - Set uCode address location
4721 *
4722 * Tell initialization uCode where to find runtime uCode.
4723 *
4724 * BSM registers initially contain pointers to initialization uCode.
4725 * We need to replace them to load runtime uCode inst and data,
4726 * and to save runtime data when powering down.
4727 */
4728 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4729 {
4730 dma_addr_t pinst;
4731 dma_addr_t pdata;
4732 int rc = 0;
4733 unsigned long flags;
4734
4735 /* bits 35:4 for 4965 */
4736 pinst = priv->ucode_code.p_addr >> 4;
4737 pdata = priv->ucode_data_backup.p_addr >> 4;
4738
4739 spin_lock_irqsave(&priv->lock, flags);
4740 rc = iwl_grab_nic_access(priv);
4741 if (rc) {
4742 spin_unlock_irqrestore(&priv->lock, flags);
4743 return rc;
4744 }
4745
4746 /* Tell bootstrap uCode where to find image to load */
4747 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4748 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4749 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4750 priv->ucode_data.len);
4751
4752 /* Inst bytecount must be last to set up, bit 31 signals uCode
4753 * that all new ptr/size info is in place */
4754 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4755 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4756
4757 iwl_release_nic_access(priv);
4758
4759 spin_unlock_irqrestore(&priv->lock, flags);
4760
4761 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4762
4763 return rc;
4764 }
4765
4766 /**
4767 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4768 *
4769 * Called after REPLY_ALIVE notification received from "initialize" uCode.
4770 *
4771 * The 4965 "initialize" ALIVE reply contains calibration data for:
4772 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
4773 * (3945 does not contain this data).
4774 *
4775 * Tell "initialize" uCode to go ahead and load the runtime uCode.
4776 */
4777 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4778 {
4779 /* Check alive response for "valid" sign from uCode */
4780 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4781 /* We had an error bringing up the hardware, so take it
4782 * all the way back down so we can try again */
4783 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4784 goto restart;
4785 }
4786
4787 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4788 * This is a paranoid check, because we would not have gotten the
4789 * "initialize" alive if code weren't properly loaded. */
4790 if (iwl_verify_ucode(priv)) {
4791 /* Runtime instruction load was bad;
4792 * take it all the way back down so we can try again */
4793 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4794 goto restart;
4795 }
4796
4797 /* Calculate temperature */
4798 priv->temperature = iwl4965_get_temperature(priv);
4799
4800 /* Send pointers to protocol/runtime uCode image ... init code will
4801 * load and launch runtime uCode, which will send us another "Alive"
4802 * notification. */
4803 IWL_DEBUG_INFO("Initialization Alive received.\n");
4804 if (iwl4965_set_ucode_ptrs(priv)) {
4805 /* Runtime instruction load won't happen;
4806 * take it all the way back down so we can try again */
4807 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4808 goto restart;
4809 }
4810 return;
4811
4812 restart:
4813 queue_work(priv->workqueue, &priv->restart);
4814 }
4815
4816
4817 /**
4818 * iwl4965_alive_start - called after REPLY_ALIVE notification received
4819 * from protocol/runtime uCode (initialization uCode's
4820 * Alive gets handled by iwl4965_init_alive_start()).
4821 */
4822 static void iwl4965_alive_start(struct iwl_priv *priv)
4823 {
4824 int ret = 0;
4825
4826 IWL_DEBUG_INFO("Runtime Alive received.\n");
4827
4828 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4829 /* We had an error bringing up the hardware, so take it
4830 * all the way back down so we can try again */
4831 IWL_DEBUG_INFO("Alive failed.\n");
4832 goto restart;
4833 }
4834
4835 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4836 * This is a paranoid check, because we would not have gotten the
4837 * "runtime" alive if code weren't properly loaded. */
4838 if (iwl_verify_ucode(priv)) {
4839 /* Runtime instruction load was bad;
4840 * take it all the way back down so we can try again */
4841 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4842 goto restart;
4843 }
4844
4845 iwlcore_clear_stations_table(priv);
4846
4847 ret = priv->cfg->ops->lib->alive_notify(priv);
4848 if (ret) {
4849 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4850 ret);
4851 goto restart;
4852 }
4853
4854 /* After the ALIVE response, we can send host commands to 4965 uCode */
4855 set_bit(STATUS_ALIVE, &priv->status);
4856
4857 /* Clear out the uCode error bit if it is set */
4858 clear_bit(STATUS_FW_ERROR, &priv->status);
4859
4860 if (iwl_is_rfkill(priv))
4861 return;
4862
4863 ieee80211_start_queues(priv->hw);
4864
4865 priv->active_rate = priv->rates_mask;
4866 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4867
4868 if (iwl_is_associated(priv)) {
4869 struct iwl4965_rxon_cmd *active_rxon =
4870 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4871
4872 memcpy(&priv->staging_rxon, &priv->active_rxon,
4873 sizeof(priv->staging_rxon));
4874 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4875 } else {
4876 /* Initialize our rx_config data */
4877 iwl4965_connection_init_rx_config(priv);
4878 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4879 }
4880
4881 /* Configure Bluetooth device coexistence support */
4882 iwl4965_send_bt_config(priv);
4883
4884 /* Configure the adapter for unassociated operation */
4885 iwl4965_commit_rxon(priv);
4886
4887 /* At this point, the NIC is initialized and operational */
4888 priv->notif_missed_beacons = 0;
4889
4890 iwl4965_rf_kill_ct_config(priv);
4891
4892 iwl_leds_register(priv);
4893
4894 IWL_DEBUG_INFO("ALIVE processing complete.\n");
4895 set_bit(STATUS_READY, &priv->status);
4896 wake_up_interruptible(&priv->wait_command_queue);
4897
4898 if (priv->error_recovering)
4899 iwl4965_error_recovery(priv);
4900
4901 iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4902 ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4903 return;
4904
4905 restart:
4906 queue_work(priv->workqueue, &priv->restart);
4907 }
4908
4909 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4910
4911 static void __iwl4965_down(struct iwl_priv *priv)
4912 {
4913 unsigned long flags;
4914 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4915 struct ieee80211_conf *conf = NULL;
4916
4917 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4918
4919 conf = ieee80211_get_hw_conf(priv->hw);
4920
4921 if (!exit_pending)
4922 set_bit(STATUS_EXIT_PENDING, &priv->status);
4923
4924 iwl_leds_unregister(priv);
4925
4926 iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4927
4928 iwlcore_clear_stations_table(priv);
4929
4930 /* Unblock any waiting calls */
4931 wake_up_interruptible_all(&priv->wait_command_queue);
4932
4933 /* Wipe out the EXIT_PENDING status bit if we are not actually
4934 * exiting the module */
4935 if (!exit_pending)
4936 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4937
4938 /* stop and reset the on-board processor */
4939 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4940
4941 /* tell the device to stop sending interrupts */
4942 spin_lock_irqsave(&priv->lock, flags);
4943 iwl4965_disable_interrupts(priv);
4944 spin_unlock_irqrestore(&priv->lock, flags);
4945 iwl_synchronize_irq(priv);
4946
4947 if (priv->mac80211_registered)
4948 ieee80211_stop_queues(priv->hw);
4949
4950 /* If we have not previously called iwl4965_init() then
4951 * clear all bits but the RF Kill and SUSPEND bits and return */
4952 if (!iwl_is_init(priv)) {
4953 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4954 STATUS_RF_KILL_HW |
4955 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4956 STATUS_RF_KILL_SW |
4957 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4958 STATUS_GEO_CONFIGURED |
4959 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4960 STATUS_IN_SUSPEND;
4961 goto exit;
4962 }
4963
4964 /* ...otherwise clear out all the status bits but the RF Kill and
4965 * SUSPEND bits and continue taking the NIC down. */
4966 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4967 STATUS_RF_KILL_HW |
4968 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4969 STATUS_RF_KILL_SW |
4970 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4971 STATUS_GEO_CONFIGURED |
4972 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4973 STATUS_IN_SUSPEND |
4974 test_bit(STATUS_FW_ERROR, &priv->status) <<
4975 STATUS_FW_ERROR;
4976
4977 spin_lock_irqsave(&priv->lock, flags);
4978 iwl_clear_bit(priv, CSR_GP_CNTRL,
4979 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4980 spin_unlock_irqrestore(&priv->lock, flags);
4981
4982 iwl4965_hw_txq_ctx_stop(priv);
4983 iwl4965_hw_rxq_stop(priv);
4984
4985 spin_lock_irqsave(&priv->lock, flags);
4986 if (!iwl_grab_nic_access(priv)) {
4987 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4988 APMG_CLK_VAL_DMA_CLK_RQT);
4989 iwl_release_nic_access(priv);
4990 }
4991 spin_unlock_irqrestore(&priv->lock, flags);
4992
4993 udelay(5);
4994
4995 iwl4965_hw_nic_stop_master(priv);
4996 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4997 iwl4965_hw_nic_reset(priv);
4998 priv->cfg->ops->lib->free_shared_mem(priv);
4999
5000 exit:
5001 memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5002
5003 if (priv->ibss_beacon)
5004 dev_kfree_skb(priv->ibss_beacon);
5005 priv->ibss_beacon = NULL;
5006
5007 /* clear out any free frames */
5008 iwl4965_clear_free_frames(priv);
5009 }
5010
5011 static void iwl4965_down(struct iwl_priv *priv)
5012 {
5013 mutex_lock(&priv->mutex);
5014 __iwl4965_down(priv);
5015 mutex_unlock(&priv->mutex);
5016
5017 iwl4965_cancel_deferred_work(priv);
5018 }
5019
5020 #define MAX_HW_RESTARTS 5
5021
5022 static int __iwl4965_up(struct iwl_priv *priv)
5023 {
5024 int i;
5025 int ret;
5026
5027 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5028 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5029 return -EIO;
5030 }
5031
5032 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5033 IWL_WARNING("Radio disabled by SW RF kill (module "
5034 "parameter)\n");
5035 iwl_rfkill_set_hw_state(priv);
5036 return -ENODEV;
5037 }
5038
5039 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5040 IWL_ERROR("ucode not available for device bringup\n");
5041 return -EIO;
5042 }
5043
5044 /* If platform's RF_KILL switch is NOT set to KILL */
5045 if (iwl_read32(priv, CSR_GP_CNTRL) &
5046 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5047 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5048 else {
5049 set_bit(STATUS_RF_KILL_HW, &priv->status);
5050 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5051 iwl_rfkill_set_hw_state(priv);
5052 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5053 return -ENODEV;
5054 }
5055 }
5056
5057 iwl_rfkill_set_hw_state(priv);
5058 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5059
5060 ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
5061 if (ret) {
5062 IWL_ERROR("Unable to allocate shared memory\n");
5063 return ret;
5064 }
5065
5066 ret = priv->cfg->ops->lib->hw_nic_init(priv);
5067 if (ret) {
5068 IWL_ERROR("Unable to init nic\n");
5069 return ret;
5070 }
5071
5072 /* make sure rfkill handshake bits are cleared */
5073 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5074 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5075 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5076
5077 /* clear (again), then enable host interrupts */
5078 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5079 iwl4965_enable_interrupts(priv);
5080
5081 /* really make sure rfkill handshake bits are cleared */
5082 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5083 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5084
5085 /* Copy original ucode data image from disk into backup cache.
5086 * This will be used to initialize the on-board processor's
5087 * data SRAM for a clean start when the runtime program first loads. */
5088 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5089 priv->ucode_data.len);
5090
5091 /* We return success when we resume from suspend and rf_kill is on. */
5092 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5093 return 0;
5094
5095 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5096
5097 iwlcore_clear_stations_table(priv);
5098
5099 /* load bootstrap state machine,
5100 * load bootstrap program into processor's memory,
5101 * prepare to load the "initialize" uCode */
5102 ret = priv->cfg->ops->lib->load_ucode(priv);
5103
5104 if (ret) {
5105 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5106 continue;
5107 }
5108
5109 /* start card; "initialize" will load runtime ucode */
5110 iwl4965_nic_start(priv);
5111
5112 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5113
5114 return 0;
5115 }
5116
5117 set_bit(STATUS_EXIT_PENDING, &priv->status);
5118 __iwl4965_down(priv);
5119
5120 /* tried to restart and config the device for as long as our
5121 * patience could withstand */
5122 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5123 return -EIO;
5124 }
5125
5126
5127 /*****************************************************************************
5128 *
5129 * Workqueue callbacks
5130 *
5131 *****************************************************************************/
5132
5133 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5134 {
5135 struct iwl_priv *priv =
5136 container_of(data, struct iwl_priv, init_alive_start.work);
5137
5138 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5139 return;
5140
5141 mutex_lock(&priv->mutex);
5142 iwl4965_init_alive_start(priv);
5143 mutex_unlock(&priv->mutex);
5144 }
5145
5146 static void iwl4965_bg_alive_start(struct work_struct *data)
5147 {
5148 struct iwl_priv *priv =
5149 container_of(data, struct iwl_priv, alive_start.work);
5150
5151 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5152 return;
5153
5154 mutex_lock(&priv->mutex);
5155 iwl4965_alive_start(priv);
5156 mutex_unlock(&priv->mutex);
5157 }
5158
5159 static void iwl4965_bg_rf_kill(struct work_struct *work)
5160 {
5161 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5162
5163 wake_up_interruptible(&priv->wait_command_queue);
5164
5165 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5166 return;
5167
5168 mutex_lock(&priv->mutex);
5169
5170 if (!iwl_is_rfkill(priv)) {
5171 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5172 "HW and/or SW RF Kill no longer active, restarting "
5173 "device\n");
5174 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5175 queue_work(priv->workqueue, &priv->restart);
5176 } else {
5177 /* make sure mac80211 stop sending Tx frame */
5178 if (priv->mac80211_registered)
5179 ieee80211_stop_queues(priv->hw);
5180
5181 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5182 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5183 "disabled by SW switch\n");
5184 else
5185 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5186 "Kill switch must be turned off for "
5187 "wireless networking to work.\n");
5188 }
5189 iwl_rfkill_set_hw_state(priv);
5190
5191 mutex_unlock(&priv->mutex);
5192 }
5193
5194 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5195
5196 static void iwl4965_bg_scan_check(struct work_struct *data)
5197 {
5198 struct iwl_priv *priv =
5199 container_of(data, struct iwl_priv, scan_check.work);
5200
5201 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5202 return;
5203
5204 mutex_lock(&priv->mutex);
5205 if (test_bit(STATUS_SCANNING, &priv->status) ||
5206 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5207 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5208 "Scan completion watchdog resetting adapter (%dms)\n",
5209 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5210
5211 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5212 iwl4965_send_scan_abort(priv);
5213 }
5214 mutex_unlock(&priv->mutex);
5215 }
5216
5217 static void iwl4965_bg_request_scan(struct work_struct *data)
5218 {
5219 struct iwl_priv *priv =
5220 container_of(data, struct iwl_priv, request_scan);
5221 struct iwl_host_cmd cmd = {
5222 .id = REPLY_SCAN_CMD,
5223 .len = sizeof(struct iwl4965_scan_cmd),
5224 .meta.flags = CMD_SIZE_HUGE,
5225 };
5226 struct iwl4965_scan_cmd *scan;
5227 struct ieee80211_conf *conf = NULL;
5228 u16 cmd_len;
5229 enum ieee80211_band band;
5230 u8 direct_mask;
5231 int ret = 0;
5232
5233 conf = ieee80211_get_hw_conf(priv->hw);
5234
5235 mutex_lock(&priv->mutex);
5236
5237 if (!iwl_is_ready(priv)) {
5238 IWL_WARNING("request scan called when driver not ready.\n");
5239 goto done;
5240 }
5241
5242 /* Make sure the scan wasn't cancelled before this queued work
5243 * was given the chance to run... */
5244 if (!test_bit(STATUS_SCANNING, &priv->status))
5245 goto done;
5246
5247 /* This should never be called or scheduled if there is currently
5248 * a scan active in the hardware. */
5249 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5250 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5251 "Ignoring second request.\n");
5252 ret = -EIO;
5253 goto done;
5254 }
5255
5256 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5257 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5258 goto done;
5259 }
5260
5261 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5262 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
5263 goto done;
5264 }
5265
5266 if (iwl_is_rfkill(priv)) {
5267 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5268 goto done;
5269 }
5270
5271 if (!test_bit(STATUS_READY, &priv->status)) {
5272 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
5273 goto done;
5274 }
5275
5276 if (!priv->scan_bands) {
5277 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5278 goto done;
5279 }
5280
5281 if (!priv->scan) {
5282 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5283 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5284 if (!priv->scan) {
5285 ret = -ENOMEM;
5286 goto done;
5287 }
5288 }
5289 scan = priv->scan;
5290 memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5291
5292 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5293 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5294
5295 if (iwl_is_associated(priv)) {
5296 u16 interval = 0;
5297 u32 extra;
5298 u32 suspend_time = 100;
5299 u32 scan_suspend_time = 100;
5300 unsigned long flags;
5301
5302 IWL_DEBUG_INFO("Scanning while associated...\n");
5303
5304 spin_lock_irqsave(&priv->lock, flags);
5305 interval = priv->beacon_int;
5306 spin_unlock_irqrestore(&priv->lock, flags);
5307
5308 scan->suspend_time = 0;
5309 scan->max_out_time = cpu_to_le32(200 * 1024);
5310 if (!interval)
5311 interval = suspend_time;
5312
5313 extra = (suspend_time / interval) << 22;
5314 scan_suspend_time = (extra |
5315 ((suspend_time % interval) * 1024));
5316 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5317 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5318 scan_suspend_time, interval);
5319 }
5320
5321 /* We should add the ability for user to lock to PASSIVE ONLY */
5322 if (priv->one_direct_scan) {
5323 IWL_DEBUG_SCAN
5324 ("Kicking off one direct scan for '%s'\n",
5325 iwl4965_escape_essid(priv->direct_ssid,
5326 priv->direct_ssid_len));
5327 scan->direct_scan[0].id = WLAN_EID_SSID;
5328 scan->direct_scan[0].len = priv->direct_ssid_len;
5329 memcpy(scan->direct_scan[0].ssid,
5330 priv->direct_ssid, priv->direct_ssid_len);
5331 direct_mask = 1;
5332 } else if (!iwl_is_associated(priv) && priv->essid_len) {
5333 IWL_DEBUG_SCAN
5334 ("Kicking off one direct scan for '%s' when not associated\n",
5335 iwl4965_escape_essid(priv->essid, priv->essid_len));
5336 scan->direct_scan[0].id = WLAN_EID_SSID;
5337 scan->direct_scan[0].len = priv->essid_len;
5338 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5339 direct_mask = 1;
5340 } else {
5341 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5342 direct_mask = 0;
5343 }
5344
5345 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5346 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5347 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5348
5349
5350 switch (priv->scan_bands) {
5351 case 2:
5352 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5353 scan->tx_cmd.rate_n_flags =
5354 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5355 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5356
5357 scan->good_CRC_th = 0;
5358 band = IEEE80211_BAND_2GHZ;
5359 break;
5360
5361 case 1:
5362 scan->tx_cmd.rate_n_flags =
5363 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5364 RATE_MCS_ANT_B_MSK);
5365 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5366 band = IEEE80211_BAND_5GHZ;
5367 break;
5368
5369 default:
5370 IWL_WARNING("Invalid scan band count\n");
5371 goto done;
5372 }
5373
5374 /* We don't build a direct scan probe request; the uCode will do
5375 * that based on the direct_mask added to each channel entry */
5376 cmd_len = iwl4965_fill_probe_req(priv, band,
5377 (struct ieee80211_mgmt *)scan->data,
5378 IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5379
5380 scan->tx_cmd.len = cpu_to_le16(cmd_len);
5381 /* select Rx chains */
5382
5383 /* Force use of chains B and C (0x6) for scan Rx.
5384 * Avoid A (0x1) because of its off-channel reception on A-band.
5385 * MIMO is not used here, but value is required to make uCode happy. */
5386 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5387 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5388 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5389 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5390
5391 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5392 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5393
5394 if (direct_mask)
5395 scan->channel_count =
5396 iwl4965_get_channels_for_scan(
5397 priv, band, 1, /* active */
5398 direct_mask,
5399 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5400 else
5401 scan->channel_count =
5402 iwl4965_get_channels_for_scan(
5403 priv, band, 0, /* passive */
5404 direct_mask,
5405 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5406
5407 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5408 RXON_FILTER_BCON_AWARE_MSK);
5409 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5410 scan->channel_count * sizeof(struct iwl4965_scan_channel);
5411 cmd.data = scan;
5412 scan->len = cpu_to_le16(cmd.len);
5413
5414 set_bit(STATUS_SCAN_HW, &priv->status);
5415 ret = iwl_send_cmd_sync(priv, &cmd);
5416 if (ret)
5417 goto done;
5418
5419 queue_delayed_work(priv->workqueue, &priv->scan_check,
5420 IWL_SCAN_CHECK_WATCHDOG);
5421
5422 mutex_unlock(&priv->mutex);
5423 return;
5424
5425 done:
5426 /* inform mac80211 scan aborted */
5427 queue_work(priv->workqueue, &priv->scan_completed);
5428 mutex_unlock(&priv->mutex);
5429 }
5430
5431 static void iwl4965_bg_up(struct work_struct *data)
5432 {
5433 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5434
5435 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5436 return;
5437
5438 mutex_lock(&priv->mutex);
5439 __iwl4965_up(priv);
5440 mutex_unlock(&priv->mutex);
5441 }
5442
5443 static void iwl4965_bg_restart(struct work_struct *data)
5444 {
5445 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5446
5447 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5448 return;
5449
5450 iwl4965_down(priv);
5451 queue_work(priv->workqueue, &priv->up);
5452 }
5453
5454 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5455 {
5456 struct iwl_priv *priv =
5457 container_of(data, struct iwl_priv, rx_replenish);
5458
5459 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5460 return;
5461
5462 mutex_lock(&priv->mutex);
5463 iwl4965_rx_replenish(priv);
5464 mutex_unlock(&priv->mutex);
5465 }
5466
5467 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5468
5469 static void iwl4965_post_associate(struct iwl_priv *priv)
5470 {
5471 struct ieee80211_conf *conf = NULL;
5472 int ret = 0;
5473 DECLARE_MAC_BUF(mac);
5474
5475 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5476 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5477 return;
5478 }
5479
5480 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5481 priv->assoc_id,
5482 print_mac(mac, priv->active_rxon.bssid_addr));
5483
5484
5485 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5486 return;
5487
5488
5489 if (!priv->vif || !priv->is_open)
5490 return;
5491
5492 iwl4965_scan_cancel_timeout(priv, 200);
5493
5494 conf = ieee80211_get_hw_conf(priv->hw);
5495
5496 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5497 iwl4965_commit_rxon(priv);
5498
5499 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5500 iwl4965_setup_rxon_timing(priv);
5501 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5502 sizeof(priv->rxon_timing), &priv->rxon_timing);
5503 if (ret)
5504 IWL_WARNING("REPLY_RXON_TIMING failed - "
5505 "Attempting to continue.\n");
5506
5507 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5508
5509 #ifdef CONFIG_IWL4965_HT
5510 if (priv->current_ht_config.is_ht)
5511 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5512 #endif /* CONFIG_IWL4965_HT*/
5513 iwl_set_rxon_chain(priv);
5514 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5515
5516 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5517 priv->assoc_id, priv->beacon_int);
5518
5519 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5520 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5521 else
5522 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5523
5524 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5525 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5526 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5527 else
5528 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5529
5530 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5531 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5532
5533 }
5534
5535 iwl4965_commit_rxon(priv);
5536
5537 switch (priv->iw_mode) {
5538 case IEEE80211_IF_TYPE_STA:
5539 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5540 break;
5541
5542 case IEEE80211_IF_TYPE_IBSS:
5543
5544 /* clear out the station table */
5545 iwlcore_clear_stations_table(priv);
5546
5547 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5548 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5549 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5550 iwl4965_send_beacon_cmd(priv);
5551
5552 break;
5553
5554 default:
5555 IWL_ERROR("%s Should not be called in %d mode\n",
5556 __FUNCTION__, priv->iw_mode);
5557 break;
5558 }
5559
5560 iwl4965_sequence_reset(priv);
5561
5562 /* Enable Rx differential gain and sensitivity calibrations */
5563 iwl_chain_noise_reset(priv);
5564 priv->start_calib = 1;
5565
5566 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5567 priv->assoc_station_added = 1;
5568
5569 iwl4965_activate_qos(priv, 0);
5570
5571 iwl_power_update_mode(priv, 0);
5572 /* we have just associated, don't start scan too early */
5573 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5574 }
5575
5576
5577 static void iwl4965_bg_post_associate(struct work_struct *data)
5578 {
5579 struct iwl_priv *priv = container_of(data, struct iwl_priv,
5580 post_associate.work);
5581
5582 mutex_lock(&priv->mutex);
5583 iwl4965_post_associate(priv);
5584 mutex_unlock(&priv->mutex);
5585
5586 }
5587
5588 static void iwl4965_bg_abort_scan(struct work_struct *work)
5589 {
5590 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5591
5592 if (!iwl_is_ready(priv))
5593 return;
5594
5595 mutex_lock(&priv->mutex);
5596
5597 set_bit(STATUS_SCAN_ABORTING, &priv->status);
5598 iwl4965_send_scan_abort(priv);
5599
5600 mutex_unlock(&priv->mutex);
5601 }
5602
5603 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5604
5605 static void iwl4965_bg_scan_completed(struct work_struct *work)
5606 {
5607 struct iwl_priv *priv =
5608 container_of(work, struct iwl_priv, scan_completed);
5609
5610 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5611
5612 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5613 return;
5614
5615 if (test_bit(STATUS_CONF_PENDING, &priv->status))
5616 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5617
5618 ieee80211_scan_completed(priv->hw);
5619
5620 /* Since setting the TXPOWER may have been deferred while
5621 * performing the scan, fire one off */
5622 mutex_lock(&priv->mutex);
5623 iwl4965_hw_reg_send_txpower(priv);
5624 mutex_unlock(&priv->mutex);
5625 }
5626
5627 /*****************************************************************************
5628 *
5629 * mac80211 entry point functions
5630 *
5631 *****************************************************************************/
5632
5633 #define UCODE_READY_TIMEOUT (2 * HZ)
5634
5635 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5636 {
5637 struct iwl_priv *priv = hw->priv;
5638 int ret;
5639
5640 IWL_DEBUG_MAC80211("enter\n");
5641
5642 if (pci_enable_device(priv->pci_dev)) {
5643 IWL_ERROR("Fail to pci_enable_device\n");
5644 return -ENODEV;
5645 }
5646 pci_restore_state(priv->pci_dev);
5647 pci_enable_msi(priv->pci_dev);
5648
5649 ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5650 DRV_NAME, priv);
5651 if (ret) {
5652 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5653 goto out_disable_msi;
5654 }
5655
5656 /* we should be verifying the device is ready to be opened */
5657 mutex_lock(&priv->mutex);
5658
5659 memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5660 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5661 * ucode filename and max sizes are card-specific. */
5662
5663 if (!priv->ucode_code.len) {
5664 ret = iwl4965_read_ucode(priv);
5665 if (ret) {
5666 IWL_ERROR("Could not read microcode: %d\n", ret);
5667 mutex_unlock(&priv->mutex);
5668 goto out_release_irq;
5669 }
5670 }
5671
5672 ret = __iwl4965_up(priv);
5673
5674 mutex_unlock(&priv->mutex);
5675
5676 if (ret)
5677 goto out_release_irq;
5678
5679 IWL_DEBUG_INFO("Start UP work done.\n");
5680
5681 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5682 return 0;
5683
5684 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5685 * mac80211 will not be run successfully. */
5686 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5687 test_bit(STATUS_READY, &priv->status),
5688 UCODE_READY_TIMEOUT);
5689 if (!ret) {
5690 if (!test_bit(STATUS_READY, &priv->status)) {
5691 IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5692 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5693 ret = -ETIMEDOUT;
5694 goto out_release_irq;
5695 }
5696 }
5697
5698 priv->is_open = 1;
5699 IWL_DEBUG_MAC80211("leave\n");
5700 return 0;
5701
5702 out_release_irq:
5703 free_irq(priv->pci_dev->irq, priv);
5704 out_disable_msi:
5705 pci_disable_msi(priv->pci_dev);
5706 pci_disable_device(priv->pci_dev);
5707 priv->is_open = 0;
5708 IWL_DEBUG_MAC80211("leave - failed\n");
5709 return ret;
5710 }
5711
5712 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5713 {
5714 struct iwl_priv *priv = hw->priv;
5715
5716 IWL_DEBUG_MAC80211("enter\n");
5717
5718 if (!priv->is_open) {
5719 IWL_DEBUG_MAC80211("leave - skip\n");
5720 return;
5721 }
5722
5723 priv->is_open = 0;
5724
5725 if (iwl_is_ready_rf(priv)) {
5726 /* stop mac, cancel any scan request and clear
5727 * RXON_FILTER_ASSOC_MSK BIT
5728 */
5729 mutex_lock(&priv->mutex);
5730 iwl4965_scan_cancel_timeout(priv, 100);
5731 cancel_delayed_work(&priv->post_associate);
5732 mutex_unlock(&priv->mutex);
5733 }
5734
5735 iwl4965_down(priv);
5736
5737 flush_workqueue(priv->workqueue);
5738 free_irq(priv->pci_dev->irq, priv);
5739 pci_disable_msi(priv->pci_dev);
5740 pci_save_state(priv->pci_dev);
5741 pci_disable_device(priv->pci_dev);
5742
5743 IWL_DEBUG_MAC80211("leave\n");
5744 }
5745
5746 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5747 struct ieee80211_tx_control *ctl)
5748 {
5749 struct iwl_priv *priv = hw->priv;
5750
5751 IWL_DEBUG_MAC80211("enter\n");
5752
5753 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5754 IWL_DEBUG_MAC80211("leave - monitor\n");
5755 return -1;
5756 }
5757
5758 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5759 ctl->tx_rate->bitrate);
5760
5761 if (iwl4965_tx_skb(priv, skb, ctl))
5762 dev_kfree_skb_any(skb);
5763
5764 IWL_DEBUG_MAC80211("leave\n");
5765 return 0;
5766 }
5767
5768 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5769 struct ieee80211_if_init_conf *conf)
5770 {
5771 struct iwl_priv *priv = hw->priv;
5772 unsigned long flags;
5773 DECLARE_MAC_BUF(mac);
5774
5775 IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5776
5777 if (priv->vif) {
5778 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5779 return -EOPNOTSUPP;
5780 }
5781
5782 spin_lock_irqsave(&priv->lock, flags);
5783 priv->vif = conf->vif;
5784
5785 spin_unlock_irqrestore(&priv->lock, flags);
5786
5787 mutex_lock(&priv->mutex);
5788
5789 if (conf->mac_addr) {
5790 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5791 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5792 }
5793
5794 if (iwl_is_ready(priv))
5795 iwl4965_set_mode(priv, conf->type);
5796
5797 mutex_unlock(&priv->mutex);
5798
5799 IWL_DEBUG_MAC80211("leave\n");
5800 return 0;
5801 }
5802
5803 /**
5804 * iwl4965_mac_config - mac80211 config callback
5805 *
5806 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5807 * be set inappropriately and the driver currently sets the hardware up to
5808 * use it whenever needed.
5809 */
5810 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5811 {
5812 struct iwl_priv *priv = hw->priv;
5813 const struct iwl_channel_info *ch_info;
5814 unsigned long flags;
5815 int ret = 0;
5816
5817 mutex_lock(&priv->mutex);
5818 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5819
5820 priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5821
5822 if (!iwl_is_ready(priv)) {
5823 IWL_DEBUG_MAC80211("leave - not ready\n");
5824 ret = -EIO;
5825 goto out;
5826 }
5827
5828 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5829 test_bit(STATUS_SCANNING, &priv->status))) {
5830 IWL_DEBUG_MAC80211("leave - scanning\n");
5831 set_bit(STATUS_CONF_PENDING, &priv->status);
5832 mutex_unlock(&priv->mutex);
5833 return 0;
5834 }
5835
5836 spin_lock_irqsave(&priv->lock, flags);
5837
5838 ch_info = iwl_get_channel_info(priv, conf->channel->band,
5839 ieee80211_frequency_to_channel(conf->channel->center_freq));
5840 if (!is_channel_valid(ch_info)) {
5841 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5842 spin_unlock_irqrestore(&priv->lock, flags);
5843 ret = -EINVAL;
5844 goto out;
5845 }
5846
5847 #ifdef CONFIG_IWL4965_HT
5848 /* if we are switching from ht to 2.4 clear flags
5849 * from any ht related info since 2.4 does not
5850 * support ht */
5851 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5852 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5853 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5854 #endif
5855 )
5856 priv->staging_rxon.flags = 0;
5857 #endif /* CONFIG_IWL4965_HT */
5858
5859 iwl_set_rxon_channel(priv, conf->channel->band,
5860 ieee80211_frequency_to_channel(conf->channel->center_freq));
5861
5862 iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5863
5864 /* The list of supported rates and rate mask can be different
5865 * for each band; since the band may have changed, reset
5866 * the rate mask to what mac80211 lists */
5867 iwl4965_set_rate(priv);
5868
5869 spin_unlock_irqrestore(&priv->lock, flags);
5870
5871 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5872 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5873 iwl4965_hw_channel_switch(priv, conf->channel);
5874 goto out;
5875 }
5876 #endif
5877
5878 if (priv->cfg->ops->lib->radio_kill_sw)
5879 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5880
5881 if (!conf->radio_enabled) {
5882 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5883 goto out;
5884 }
5885
5886 if (iwl_is_rfkill(priv)) {
5887 IWL_DEBUG_MAC80211("leave - RF kill\n");
5888 ret = -EIO;
5889 goto out;
5890 }
5891
5892 iwl4965_set_rate(priv);
5893
5894 if (memcmp(&priv->active_rxon,
5895 &priv->staging_rxon, sizeof(priv->staging_rxon)))
5896 iwl4965_commit_rxon(priv);
5897 else
5898 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5899
5900 IWL_DEBUG_MAC80211("leave\n");
5901
5902 out:
5903 clear_bit(STATUS_CONF_PENDING, &priv->status);
5904 mutex_unlock(&priv->mutex);
5905 return ret;
5906 }
5907
5908 static void iwl4965_config_ap(struct iwl_priv *priv)
5909 {
5910 int ret = 0;
5911
5912 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5913 return;
5914
5915 /* The following should be done only at AP bring up */
5916 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5917
5918 /* RXON - unassoc (to set timing command) */
5919 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5920 iwl4965_commit_rxon(priv);
5921
5922 /* RXON Timing */
5923 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5924 iwl4965_setup_rxon_timing(priv);
5925 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5926 sizeof(priv->rxon_timing), &priv->rxon_timing);
5927 if (ret)
5928 IWL_WARNING("REPLY_RXON_TIMING failed - "
5929 "Attempting to continue.\n");
5930
5931 iwl_set_rxon_chain(priv);
5932
5933 /* FIXME: what should be the assoc_id for AP? */
5934 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5935 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5936 priv->staging_rxon.flags |=
5937 RXON_FLG_SHORT_PREAMBLE_MSK;
5938 else
5939 priv->staging_rxon.flags &=
5940 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5941
5942 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5943 if (priv->assoc_capability &
5944 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5945 priv->staging_rxon.flags |=
5946 RXON_FLG_SHORT_SLOT_MSK;
5947 else
5948 priv->staging_rxon.flags &=
5949 ~RXON_FLG_SHORT_SLOT_MSK;
5950
5951 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5952 priv->staging_rxon.flags &=
5953 ~RXON_FLG_SHORT_SLOT_MSK;
5954 }
5955 /* restore RXON assoc */
5956 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5957 iwl4965_commit_rxon(priv);
5958 iwl4965_activate_qos(priv, 1);
5959 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5960 }
5961 iwl4965_send_beacon_cmd(priv);
5962
5963 /* FIXME - we need to add code here to detect a totally new
5964 * configuration, reset the AP, unassoc, rxon timing, assoc,
5965 * clear sta table, add BCAST sta... */
5966 }
5967
5968 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5969 struct ieee80211_vif *vif,
5970 struct ieee80211_if_conf *conf)
5971 {
5972 struct iwl_priv *priv = hw->priv;
5973 DECLARE_MAC_BUF(mac);
5974 unsigned long flags;
5975 int rc;
5976
5977 if (conf == NULL)
5978 return -EIO;
5979
5980 if (priv->vif != vif) {
5981 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5982 return 0;
5983 }
5984
5985 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5986 (!conf->beacon || !conf->ssid_len)) {
5987 IWL_DEBUG_MAC80211
5988 ("Leaving in AP mode because HostAPD is not ready.\n");
5989 return 0;
5990 }
5991
5992 if (!iwl_is_alive(priv))
5993 return -EAGAIN;
5994
5995 mutex_lock(&priv->mutex);
5996
5997 if (conf->bssid)
5998 IWL_DEBUG_MAC80211("bssid: %s\n",
5999 print_mac(mac, conf->bssid));
6000
6001 /*
6002 * very dubious code was here; the probe filtering flag is never set:
6003 *
6004 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6005 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6006 */
6007
6008 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6009 if (!conf->bssid) {
6010 conf->bssid = priv->mac_addr;
6011 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6012 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6013 print_mac(mac, conf->bssid));
6014 }
6015 if (priv->ibss_beacon)
6016 dev_kfree_skb(priv->ibss_beacon);
6017
6018 priv->ibss_beacon = conf->beacon;
6019 }
6020
6021 if (iwl_is_rfkill(priv))
6022 goto done;
6023
6024 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6025 !is_multicast_ether_addr(conf->bssid)) {
6026 /* If there is currently a HW scan going on in the background
6027 * then we need to cancel it else the RXON below will fail. */
6028 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6029 IWL_WARNING("Aborted scan still in progress "
6030 "after 100ms\n");
6031 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6032 mutex_unlock(&priv->mutex);
6033 return -EAGAIN;
6034 }
6035 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6036
6037 /* TODO: Audit driver for usage of these members and see
6038 * if mac80211 deprecates them (priv->bssid looks like it
6039 * shouldn't be there, but I haven't scanned the IBSS code
6040 * to verify) - jpk */
6041 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6042
6043 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6044 iwl4965_config_ap(priv);
6045 else {
6046 rc = iwl4965_commit_rxon(priv);
6047 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6048 iwl4965_rxon_add_station(
6049 priv, priv->active_rxon.bssid_addr, 1);
6050 }
6051
6052 } else {
6053 iwl4965_scan_cancel_timeout(priv, 100);
6054 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6055 iwl4965_commit_rxon(priv);
6056 }
6057
6058 done:
6059 spin_lock_irqsave(&priv->lock, flags);
6060 if (!conf->ssid_len)
6061 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6062 else
6063 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6064
6065 priv->essid_len = conf->ssid_len;
6066 spin_unlock_irqrestore(&priv->lock, flags);
6067
6068 IWL_DEBUG_MAC80211("leave\n");
6069 mutex_unlock(&priv->mutex);
6070
6071 return 0;
6072 }
6073
6074 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6075 unsigned int changed_flags,
6076 unsigned int *total_flags,
6077 int mc_count, struct dev_addr_list *mc_list)
6078 {
6079 /*
6080 * XXX: dummy
6081 * see also iwl4965_connection_init_rx_config
6082 */
6083 *total_flags = 0;
6084 }
6085
6086 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6087 struct ieee80211_if_init_conf *conf)
6088 {
6089 struct iwl_priv *priv = hw->priv;
6090
6091 IWL_DEBUG_MAC80211("enter\n");
6092
6093 mutex_lock(&priv->mutex);
6094
6095 if (iwl_is_ready_rf(priv)) {
6096 iwl4965_scan_cancel_timeout(priv, 100);
6097 cancel_delayed_work(&priv->post_associate);
6098 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6099 iwl4965_commit_rxon(priv);
6100 }
6101 if (priv->vif == conf->vif) {
6102 priv->vif = NULL;
6103 memset(priv->bssid, 0, ETH_ALEN);
6104 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6105 priv->essid_len = 0;
6106 }
6107 mutex_unlock(&priv->mutex);
6108
6109 IWL_DEBUG_MAC80211("leave\n");
6110
6111 }
6112
6113 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6114 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6115 struct ieee80211_vif *vif,
6116 struct ieee80211_bss_conf *bss_conf,
6117 u32 changes)
6118 {
6119 struct iwl_priv *priv = hw->priv;
6120
6121 IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6122
6123 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6124 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6125 bss_conf->use_short_preamble);
6126 if (bss_conf->use_short_preamble)
6127 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6128 else
6129 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6130 }
6131
6132 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6133 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6134 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6135 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6136 else
6137 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6138 }
6139
6140 if (changes & BSS_CHANGED_HT) {
6141 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6142 iwl4965_ht_conf(priv, bss_conf);
6143 iwl_set_rxon_chain(priv);
6144 }
6145
6146 if (changes & BSS_CHANGED_ASSOC) {
6147 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6148 /* This should never happen as this function should
6149 * never be called from interrupt context. */
6150 if (WARN_ON_ONCE(in_interrupt()))
6151 return;
6152 if (bss_conf->assoc) {
6153 priv->assoc_id = bss_conf->aid;
6154 priv->beacon_int = bss_conf->beacon_int;
6155 priv->timestamp = bss_conf->timestamp;
6156 priv->assoc_capability = bss_conf->assoc_capability;
6157 priv->next_scan_jiffies = jiffies +
6158 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6159 mutex_lock(&priv->mutex);
6160 iwl4965_post_associate(priv);
6161 mutex_unlock(&priv->mutex);
6162 } else {
6163 priv->assoc_id = 0;
6164 IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6165 }
6166 } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6167 IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6168 iwl_send_rxon_assoc(priv);
6169 }
6170
6171 }
6172
6173 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6174 {
6175 int rc = 0;
6176 unsigned long flags;
6177 struct iwl_priv *priv = hw->priv;
6178
6179 IWL_DEBUG_MAC80211("enter\n");
6180
6181 mutex_lock(&priv->mutex);
6182 spin_lock_irqsave(&priv->lock, flags);
6183
6184 if (!iwl_is_ready_rf(priv)) {
6185 rc = -EIO;
6186 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6187 goto out_unlock;
6188 }
6189
6190 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
6191 rc = -EIO;
6192 IWL_ERROR("ERROR: APs don't scan\n");
6193 goto out_unlock;
6194 }
6195
6196 /* we don't schedule scan within next_scan_jiffies period */
6197 if (priv->next_scan_jiffies &&
6198 time_after(priv->next_scan_jiffies, jiffies)) {
6199 rc = -EAGAIN;
6200 goto out_unlock;
6201 }
6202 /* if we just finished scan ask for delay */
6203 if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6204 IWL_DELAY_NEXT_SCAN, jiffies)) {
6205 rc = -EAGAIN;
6206 goto out_unlock;
6207 }
6208 if (len) {
6209 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6210 iwl4965_escape_essid(ssid, len), (int)len);
6211
6212 priv->one_direct_scan = 1;
6213 priv->direct_ssid_len = (u8)
6214 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6215 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6216 } else
6217 priv->one_direct_scan = 0;
6218
6219 rc = iwl4965_scan_initiate(priv);
6220
6221 IWL_DEBUG_MAC80211("leave\n");
6222
6223 out_unlock:
6224 spin_unlock_irqrestore(&priv->lock, flags);
6225 mutex_unlock(&priv->mutex);
6226
6227 return rc;
6228 }
6229
6230 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6231 struct ieee80211_key_conf *keyconf, const u8 *addr,
6232 u32 iv32, u16 *phase1key)
6233 {
6234 struct iwl_priv *priv = hw->priv;
6235 u8 sta_id = IWL_INVALID_STATION;
6236 unsigned long flags;
6237 __le16 key_flags = 0;
6238 int i;
6239 DECLARE_MAC_BUF(mac);
6240
6241 IWL_DEBUG_MAC80211("enter\n");
6242
6243 sta_id = iwl_find_station(priv, addr);
6244 if (sta_id == IWL_INVALID_STATION) {
6245 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6246 print_mac(mac, addr));
6247 return;
6248 }
6249
6250 iwl4965_scan_cancel_timeout(priv, 100);
6251
6252 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6253 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6254 key_flags &= ~STA_KEY_FLG_INVALID;
6255
6256 if (sta_id == priv->hw_params.bcast_sta_id)
6257 key_flags |= STA_KEY_MULTICAST_MSK;
6258
6259 spin_lock_irqsave(&priv->sta_lock, flags);
6260
6261 priv->stations[sta_id].sta.key.key_flags = key_flags;
6262 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6263
6264 for (i = 0; i < 5; i++)
6265 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6266 cpu_to_le16(phase1key[i]);
6267
6268 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6269 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6270
6271 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6272
6273 spin_unlock_irqrestore(&priv->sta_lock, flags);
6274
6275 IWL_DEBUG_MAC80211("leave\n");
6276 }
6277
6278 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6279 const u8 *local_addr, const u8 *addr,
6280 struct ieee80211_key_conf *key)
6281 {
6282 struct iwl_priv *priv = hw->priv;
6283 DECLARE_MAC_BUF(mac);
6284 int ret = 0;
6285 u8 sta_id = IWL_INVALID_STATION;
6286 u8 is_default_wep_key = 0;
6287
6288 IWL_DEBUG_MAC80211("enter\n");
6289
6290 if (priv->hw_params.sw_crypto) {
6291 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6292 return -EOPNOTSUPP;
6293 }
6294
6295 if (is_zero_ether_addr(addr))
6296 /* only support pairwise keys */
6297 return -EOPNOTSUPP;
6298
6299 sta_id = iwl_find_station(priv, addr);
6300 if (sta_id == IWL_INVALID_STATION) {
6301 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6302 print_mac(mac, addr));
6303 return -EINVAL;
6304
6305 }
6306
6307 mutex_lock(&priv->mutex);
6308 iwl4965_scan_cancel_timeout(priv, 100);
6309 mutex_unlock(&priv->mutex);
6310
6311 /* If we are getting WEP group key and we didn't receive any key mapping
6312 * so far, we are in legacy wep mode (group key only), otherwise we are
6313 * in 1X mode.
6314 * In legacy wep mode, we use another host command to the uCode */
6315 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6316 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6317 if (cmd == SET_KEY)
6318 is_default_wep_key = !priv->key_mapping_key;
6319 else
6320 is_default_wep_key = priv->default_wep_key;
6321 }
6322
6323 switch (cmd) {
6324 case SET_KEY:
6325 if (is_default_wep_key)
6326 ret = iwl_set_default_wep_key(priv, key);
6327 else
6328 ret = iwl_set_dynamic_key(priv, key, sta_id);
6329
6330 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6331 break;
6332 case DISABLE_KEY:
6333 if (is_default_wep_key)
6334 ret = iwl_remove_default_wep_key(priv, key);
6335 else
6336 ret = iwl_remove_dynamic_key(priv, key, sta_id);
6337
6338 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6339 break;
6340 default:
6341 ret = -EINVAL;
6342 }
6343
6344 IWL_DEBUG_MAC80211("leave\n");
6345
6346 return ret;
6347 }
6348
6349 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6350 const struct ieee80211_tx_queue_params *params)
6351 {
6352 struct iwl_priv *priv = hw->priv;
6353 unsigned long flags;
6354 int q;
6355
6356 IWL_DEBUG_MAC80211("enter\n");
6357
6358 if (!iwl_is_ready_rf(priv)) {
6359 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6360 return -EIO;
6361 }
6362
6363 if (queue >= AC_NUM) {
6364 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6365 return 0;
6366 }
6367
6368 if (!priv->qos_data.qos_enable) {
6369 priv->qos_data.qos_active = 0;
6370 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6371 return 0;
6372 }
6373 q = AC_NUM - 1 - queue;
6374
6375 spin_lock_irqsave(&priv->lock, flags);
6376
6377 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6378 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6379 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6380 priv->qos_data.def_qos_parm.ac[q].edca_txop =
6381 cpu_to_le16((params->txop * 32));
6382
6383 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6384 priv->qos_data.qos_active = 1;
6385
6386 spin_unlock_irqrestore(&priv->lock, flags);
6387
6388 mutex_lock(&priv->mutex);
6389 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6390 iwl4965_activate_qos(priv, 1);
6391 else if (priv->assoc_id && iwl_is_associated(priv))
6392 iwl4965_activate_qos(priv, 0);
6393
6394 mutex_unlock(&priv->mutex);
6395
6396 IWL_DEBUG_MAC80211("leave\n");
6397 return 0;
6398 }
6399
6400 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6401 struct ieee80211_tx_queue_stats *stats)
6402 {
6403 struct iwl_priv *priv = hw->priv;
6404 int i, avail;
6405 struct iwl4965_tx_queue *txq;
6406 struct iwl4965_queue *q;
6407 unsigned long flags;
6408
6409 IWL_DEBUG_MAC80211("enter\n");
6410
6411 if (!iwl_is_ready_rf(priv)) {
6412 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6413 return -EIO;
6414 }
6415
6416 spin_lock_irqsave(&priv->lock, flags);
6417
6418 for (i = 0; i < AC_NUM; i++) {
6419 txq = &priv->txq[i];
6420 q = &txq->q;
6421 avail = iwl4965_queue_space(q);
6422
6423 stats->data[i].len = q->n_window - avail;
6424 stats->data[i].limit = q->n_window - q->high_mark;
6425 stats->data[i].count = q->n_window;
6426
6427 }
6428 spin_unlock_irqrestore(&priv->lock, flags);
6429
6430 IWL_DEBUG_MAC80211("leave\n");
6431
6432 return 0;
6433 }
6434
6435 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6436 struct ieee80211_low_level_stats *stats)
6437 {
6438 IWL_DEBUG_MAC80211("enter\n");
6439 IWL_DEBUG_MAC80211("leave\n");
6440
6441 return 0;
6442 }
6443
6444 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6445 {
6446 IWL_DEBUG_MAC80211("enter\n");
6447 IWL_DEBUG_MAC80211("leave\n");
6448
6449 return 0;
6450 }
6451
6452 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6453 {
6454 struct iwl_priv *priv = hw->priv;
6455 unsigned long flags;
6456
6457 mutex_lock(&priv->mutex);
6458 IWL_DEBUG_MAC80211("enter\n");
6459
6460 priv->lq_mngr.lq_ready = 0;
6461 #ifdef CONFIG_IWL4965_HT
6462 spin_lock_irqsave(&priv->lock, flags);
6463 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6464 spin_unlock_irqrestore(&priv->lock, flags);
6465 #endif /* CONFIG_IWL4965_HT */
6466
6467 iwl_reset_qos(priv);
6468
6469 cancel_delayed_work(&priv->post_associate);
6470
6471 spin_lock_irqsave(&priv->lock, flags);
6472 priv->assoc_id = 0;
6473 priv->assoc_capability = 0;
6474 priv->assoc_station_added = 0;
6475
6476 /* new association get rid of ibss beacon skb */
6477 if (priv->ibss_beacon)
6478 dev_kfree_skb(priv->ibss_beacon);
6479
6480 priv->ibss_beacon = NULL;
6481
6482 priv->beacon_int = priv->hw->conf.beacon_int;
6483 priv->timestamp = 0;
6484 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6485 priv->beacon_int = 0;
6486
6487 spin_unlock_irqrestore(&priv->lock, flags);
6488
6489 if (!iwl_is_ready_rf(priv)) {
6490 IWL_DEBUG_MAC80211("leave - not ready\n");
6491 mutex_unlock(&priv->mutex);
6492 return;
6493 }
6494
6495 /* we are restarting association process
6496 * clear RXON_FILTER_ASSOC_MSK bit
6497 */
6498 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6499 iwl4965_scan_cancel_timeout(priv, 100);
6500 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6501 iwl4965_commit_rxon(priv);
6502 }
6503
6504 iwl_power_update_mode(priv, 0);
6505
6506 /* Per mac80211.h: This is only used in IBSS mode... */
6507 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6508
6509 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6510 mutex_unlock(&priv->mutex);
6511 return;
6512 }
6513
6514 iwl4965_set_rate(priv);
6515
6516 mutex_unlock(&priv->mutex);
6517
6518 IWL_DEBUG_MAC80211("leave\n");
6519 }
6520
6521 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6522 struct ieee80211_tx_control *control)
6523 {
6524 struct iwl_priv *priv = hw->priv;
6525 unsigned long flags;
6526
6527 mutex_lock(&priv->mutex);
6528 IWL_DEBUG_MAC80211("enter\n");
6529
6530 if (!iwl_is_ready_rf(priv)) {
6531 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6532 mutex_unlock(&priv->mutex);
6533 return -EIO;
6534 }
6535
6536 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6537 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6538 mutex_unlock(&priv->mutex);
6539 return -EIO;
6540 }
6541
6542 spin_lock_irqsave(&priv->lock, flags);
6543
6544 if (priv->ibss_beacon)
6545 dev_kfree_skb(priv->ibss_beacon);
6546
6547 priv->ibss_beacon = skb;
6548
6549 priv->assoc_id = 0;
6550
6551 IWL_DEBUG_MAC80211("leave\n");
6552 spin_unlock_irqrestore(&priv->lock, flags);
6553
6554 iwl_reset_qos(priv);
6555
6556 queue_work(priv->workqueue, &priv->post_associate.work);
6557
6558 mutex_unlock(&priv->mutex);
6559
6560 return 0;
6561 }
6562
6563 /*****************************************************************************
6564 *
6565 * sysfs attributes
6566 *
6567 *****************************************************************************/
6568
6569 #ifdef CONFIG_IWLWIFI_DEBUG
6570
6571 /*
6572 * The following adds a new attribute to the sysfs representation
6573 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6574 * used for controlling the debug level.
6575 *
6576 * See the level definitions in iwl for details.
6577 */
6578
6579 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6580 {
6581 return sprintf(buf, "0x%08X\n", iwl_debug_level);
6582 }
6583 static ssize_t store_debug_level(struct device_driver *d,
6584 const char *buf, size_t count)
6585 {
6586 char *p = (char *)buf;
6587 u32 val;
6588
6589 val = simple_strtoul(p, &p, 0);
6590 if (p == buf)
6591 printk(KERN_INFO DRV_NAME
6592 ": %s is not in hex or decimal form.\n", buf);
6593 else
6594 iwl_debug_level = val;
6595
6596 return strnlen(buf, count);
6597 }
6598
6599 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6600 show_debug_level, store_debug_level);
6601
6602 #endif /* CONFIG_IWLWIFI_DEBUG */
6603
6604
6605 static ssize_t show_temperature(struct device *d,
6606 struct device_attribute *attr, char *buf)
6607 {
6608 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6609
6610 if (!iwl_is_alive(priv))
6611 return -EAGAIN;
6612
6613 return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6614 }
6615
6616 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6617
6618 static ssize_t show_rs_window(struct device *d,
6619 struct device_attribute *attr,
6620 char *buf)
6621 {
6622 struct iwl_priv *priv = d->driver_data;
6623 return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6624 }
6625 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6626
6627 static ssize_t show_tx_power(struct device *d,
6628 struct device_attribute *attr, char *buf)
6629 {
6630 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6631 return sprintf(buf, "%d\n", priv->user_txpower_limit);
6632 }
6633
6634 static ssize_t store_tx_power(struct device *d,
6635 struct device_attribute *attr,
6636 const char *buf, size_t count)
6637 {
6638 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6639 char *p = (char *)buf;
6640 u32 val;
6641
6642 val = simple_strtoul(p, &p, 10);
6643 if (p == buf)
6644 printk(KERN_INFO DRV_NAME
6645 ": %s is not in decimal form.\n", buf);
6646 else
6647 iwl4965_hw_reg_set_txpower(priv, val);
6648
6649 return count;
6650 }
6651
6652 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6653
6654 static ssize_t show_flags(struct device *d,
6655 struct device_attribute *attr, char *buf)
6656 {
6657 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6658
6659 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6660 }
6661
6662 static ssize_t store_flags(struct device *d,
6663 struct device_attribute *attr,
6664 const char *buf, size_t count)
6665 {
6666 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6667 u32 flags = simple_strtoul(buf, NULL, 0);
6668
6669 mutex_lock(&priv->mutex);
6670 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6671 /* Cancel any currently running scans... */
6672 if (iwl4965_scan_cancel_timeout(priv, 100))
6673 IWL_WARNING("Could not cancel scan.\n");
6674 else {
6675 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6676 flags);
6677 priv->staging_rxon.flags = cpu_to_le32(flags);
6678 iwl4965_commit_rxon(priv);
6679 }
6680 }
6681 mutex_unlock(&priv->mutex);
6682
6683 return count;
6684 }
6685
6686 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6687
6688 static ssize_t show_filter_flags(struct device *d,
6689 struct device_attribute *attr, char *buf)
6690 {
6691 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6692
6693 return sprintf(buf, "0x%04X\n",
6694 le32_to_cpu(priv->active_rxon.filter_flags));
6695 }
6696
6697 static ssize_t store_filter_flags(struct device *d,
6698 struct device_attribute *attr,
6699 const char *buf, size_t count)
6700 {
6701 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6702 u32 filter_flags = simple_strtoul(buf, NULL, 0);
6703
6704 mutex_lock(&priv->mutex);
6705 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
6706 /* Cancel any currently running scans... */
6707 if (iwl4965_scan_cancel_timeout(priv, 100))
6708 IWL_WARNING("Could not cancel scan.\n");
6709 else {
6710 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6711 "0x%04X\n", filter_flags);
6712 priv->staging_rxon.filter_flags =
6713 cpu_to_le32(filter_flags);
6714 iwl4965_commit_rxon(priv);
6715 }
6716 }
6717 mutex_unlock(&priv->mutex);
6718
6719 return count;
6720 }
6721
6722 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6723 store_filter_flags);
6724
6725 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6726
6727 static ssize_t show_measurement(struct device *d,
6728 struct device_attribute *attr, char *buf)
6729 {
6730 struct iwl_priv *priv = dev_get_drvdata(d);
6731 struct iwl4965_spectrum_notification measure_report;
6732 u32 size = sizeof(measure_report), len = 0, ofs = 0;
6733 u8 *data = (u8 *) & measure_report;
6734 unsigned long flags;
6735
6736 spin_lock_irqsave(&priv->lock, flags);
6737 if (!(priv->measurement_status & MEASUREMENT_READY)) {
6738 spin_unlock_irqrestore(&priv->lock, flags);
6739 return 0;
6740 }
6741 memcpy(&measure_report, &priv->measure_report, size);
6742 priv->measurement_status = 0;
6743 spin_unlock_irqrestore(&priv->lock, flags);
6744
6745 while (size && (PAGE_SIZE - len)) {
6746 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6747 PAGE_SIZE - len, 1);
6748 len = strlen(buf);
6749 if (PAGE_SIZE - len)
6750 buf[len++] = '\n';
6751
6752 ofs += 16;
6753 size -= min(size, 16U);
6754 }
6755
6756 return len;
6757 }
6758
6759 static ssize_t store_measurement(struct device *d,
6760 struct device_attribute *attr,
6761 const char *buf, size_t count)
6762 {
6763 struct iwl_priv *priv = dev_get_drvdata(d);
6764 struct ieee80211_measurement_params params = {
6765 .channel = le16_to_cpu(priv->active_rxon.channel),
6766 .start_time = cpu_to_le64(priv->last_tsf),
6767 .duration = cpu_to_le16(1),
6768 };
6769 u8 type = IWL_MEASURE_BASIC;
6770 u8 buffer[32];
6771 u8 channel;
6772
6773 if (count) {
6774 char *p = buffer;
6775 strncpy(buffer, buf, min(sizeof(buffer), count));
6776 channel = simple_strtoul(p, NULL, 0);
6777 if (channel)
6778 params.channel = channel;
6779
6780 p = buffer;
6781 while (*p && *p != ' ')
6782 p++;
6783 if (*p)
6784 type = simple_strtoul(p + 1, NULL, 0);
6785 }
6786
6787 IWL_DEBUG_INFO("Invoking measurement of type %d on "
6788 "channel %d (for '%s')\n", type, params.channel, buf);
6789 iwl4965_get_measurement(priv, &params, type);
6790
6791 return count;
6792 }
6793
6794 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
6795 show_measurement, store_measurement);
6796 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
6797
6798 static ssize_t store_retry_rate(struct device *d,
6799 struct device_attribute *attr,
6800 const char *buf, size_t count)
6801 {
6802 struct iwl_priv *priv = dev_get_drvdata(d);
6803
6804 priv->retry_rate = simple_strtoul(buf, NULL, 0);
6805 if (priv->retry_rate <= 0)
6806 priv->retry_rate = 1;
6807
6808 return count;
6809 }
6810
6811 static ssize_t show_retry_rate(struct device *d,
6812 struct device_attribute *attr, char *buf)
6813 {
6814 struct iwl_priv *priv = dev_get_drvdata(d);
6815 return sprintf(buf, "%d", priv->retry_rate);
6816 }
6817
6818 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
6819 store_retry_rate);
6820
6821 static ssize_t store_power_level(struct device *d,
6822 struct device_attribute *attr,
6823 const char *buf, size_t count)
6824 {
6825 struct iwl_priv *priv = dev_get_drvdata(d);
6826 int rc;
6827 int mode;
6828
6829 mode = simple_strtoul(buf, NULL, 0);
6830 mutex_lock(&priv->mutex);
6831
6832 if (!iwl_is_ready(priv)) {
6833 rc = -EAGAIN;
6834 goto out;
6835 }
6836
6837 rc = iwl_power_set_user_mode(priv, mode);
6838 if (rc) {
6839 IWL_DEBUG_MAC80211("failed setting power mode.\n");
6840 goto out;
6841 }
6842 rc = count;
6843
6844 out:
6845 mutex_unlock(&priv->mutex);
6846 return rc;
6847 }
6848
6849 #define MAX_WX_STRING 80
6850
6851 /* Values are in microsecond */
6852 static const s32 timeout_duration[] = {
6853 350000,
6854 250000,
6855 75000,
6856 37000,
6857 25000,
6858 };
6859 static const s32 period_duration[] = {
6860 400000,
6861 700000,
6862 1000000,
6863 1000000,
6864 1000000
6865 };
6866
6867 static ssize_t show_power_level(struct device *d,
6868 struct device_attribute *attr, char *buf)
6869 {
6870 struct iwl_priv *priv = dev_get_drvdata(d);
6871 int level = priv->power_data.power_mode;
6872 char *p = buf;
6873
6874 p += sprintf(p, "%d ", level);
6875 switch (level) {
6876 case IWL_POWER_MODE_CAM:
6877 case IWL_POWER_AC:
6878 p += sprintf(p, "(AC)");
6879 break;
6880 case IWL_POWER_BATTERY:
6881 p += sprintf(p, "(BATTERY)");
6882 break;
6883 default:
6884 p += sprintf(p,
6885 "(Timeout %dms, Period %dms)",
6886 timeout_duration[level - 1] / 1000,
6887 period_duration[level - 1] / 1000);
6888 }
6889 /*
6890 if (!(priv->power_mode & IWL_POWER_ENABLED))
6891 p += sprintf(p, " OFF\n");
6892 else
6893 p += sprintf(p, " \n");
6894 */
6895 p += sprintf(p, " \n");
6896 return (p - buf + 1);
6897 }
6898
6899 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
6900 store_power_level);
6901
6902 static ssize_t show_channels(struct device *d,
6903 struct device_attribute *attr, char *buf)
6904 {
6905 /* all this shit doesn't belong into sysfs anyway */
6906 return 0;
6907 }
6908
6909 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
6910
6911 static ssize_t show_statistics(struct device *d,
6912 struct device_attribute *attr, char *buf)
6913 {
6914 struct iwl_priv *priv = dev_get_drvdata(d);
6915 u32 size = sizeof(struct iwl4965_notif_statistics);
6916 u32 len = 0, ofs = 0;
6917 u8 *data = (u8 *) & priv->statistics;
6918 int rc = 0;
6919
6920 if (!iwl_is_alive(priv))
6921 return -EAGAIN;
6922
6923 mutex_lock(&priv->mutex);
6924 rc = iwl_send_statistics_request(priv, 0);
6925 mutex_unlock(&priv->mutex);
6926
6927 if (rc) {
6928 len = sprintf(buf,
6929 "Error sending statistics request: 0x%08X\n", rc);
6930 return len;
6931 }
6932
6933 while (size && (PAGE_SIZE - len)) {
6934 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6935 PAGE_SIZE - len, 1);
6936 len = strlen(buf);
6937 if (PAGE_SIZE - len)
6938 buf[len++] = '\n';
6939
6940 ofs += 16;
6941 size -= min(size, 16U);
6942 }
6943
6944 return len;
6945 }
6946
6947 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
6948
6949 static ssize_t show_status(struct device *d,
6950 struct device_attribute *attr, char *buf)
6951 {
6952 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6953 if (!iwl_is_alive(priv))
6954 return -EAGAIN;
6955 return sprintf(buf, "0x%08x\n", (int)priv->status);
6956 }
6957
6958 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
6959
6960 static ssize_t dump_error_log(struct device *d,
6961 struct device_attribute *attr,
6962 const char *buf, size_t count)
6963 {
6964 char *p = (char *)buf;
6965
6966 if (p[0] == '1')
6967 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
6968
6969 return strnlen(buf, count);
6970 }
6971
6972 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
6973
6974 static ssize_t dump_event_log(struct device *d,
6975 struct device_attribute *attr,
6976 const char *buf, size_t count)
6977 {
6978 char *p = (char *)buf;
6979
6980 if (p[0] == '1')
6981 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
6982
6983 return strnlen(buf, count);
6984 }
6985
6986 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
6987
6988 /*****************************************************************************
6989 *
6990 * driver setup and teardown
6991 *
6992 *****************************************************************************/
6993
6994 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
6995 {
6996 priv->workqueue = create_workqueue(DRV_NAME);
6997
6998 init_waitqueue_head(&priv->wait_command_queue);
6999
7000 INIT_WORK(&priv->up, iwl4965_bg_up);
7001 INIT_WORK(&priv->restart, iwl4965_bg_restart);
7002 INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7003 INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7004 INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7005 INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7006 INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7007 INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7008 INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7009 INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7010 INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7011 INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7012
7013 iwl4965_hw_setup_deferred_work(priv);
7014
7015 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7016 iwl4965_irq_tasklet, (unsigned long)priv);
7017 }
7018
7019 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7020 {
7021 iwl4965_hw_cancel_deferred_work(priv);
7022
7023 cancel_delayed_work_sync(&priv->init_alive_start);
7024 cancel_delayed_work(&priv->scan_check);
7025 cancel_delayed_work(&priv->alive_start);
7026 cancel_delayed_work(&priv->post_associate);
7027 cancel_work_sync(&priv->beacon_update);
7028 }
7029
7030 static struct attribute *iwl4965_sysfs_entries[] = {
7031 &dev_attr_channels.attr,
7032 &dev_attr_dump_errors.attr,
7033 &dev_attr_dump_events.attr,
7034 &dev_attr_flags.attr,
7035 &dev_attr_filter_flags.attr,
7036 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7037 &dev_attr_measurement.attr,
7038 #endif
7039 &dev_attr_power_level.attr,
7040 &dev_attr_retry_rate.attr,
7041 &dev_attr_rs_window.attr,
7042 &dev_attr_statistics.attr,
7043 &dev_attr_status.attr,
7044 &dev_attr_temperature.attr,
7045 &dev_attr_tx_power.attr,
7046
7047 NULL
7048 };
7049
7050 static struct attribute_group iwl4965_attribute_group = {
7051 .name = NULL, /* put in device directory */
7052 .attrs = iwl4965_sysfs_entries,
7053 };
7054
7055 static struct ieee80211_ops iwl4965_hw_ops = {
7056 .tx = iwl4965_mac_tx,
7057 .start = iwl4965_mac_start,
7058 .stop = iwl4965_mac_stop,
7059 .add_interface = iwl4965_mac_add_interface,
7060 .remove_interface = iwl4965_mac_remove_interface,
7061 .config = iwl4965_mac_config,
7062 .config_interface = iwl4965_mac_config_interface,
7063 .configure_filter = iwl4965_configure_filter,
7064 .set_key = iwl4965_mac_set_key,
7065 .update_tkip_key = iwl4965_mac_update_tkip_key,
7066 .get_stats = iwl4965_mac_get_stats,
7067 .get_tx_stats = iwl4965_mac_get_tx_stats,
7068 .conf_tx = iwl4965_mac_conf_tx,
7069 .get_tsf = iwl4965_mac_get_tsf,
7070 .reset_tsf = iwl4965_mac_reset_tsf,
7071 .beacon_update = iwl4965_mac_beacon_update,
7072 .bss_info_changed = iwl4965_bss_info_changed,
7073 #ifdef CONFIG_IWL4965_HT
7074 .ampdu_action = iwl4965_mac_ampdu_action,
7075 #endif /* CONFIG_IWL4965_HT */
7076 .hw_scan = iwl4965_mac_hw_scan
7077 };
7078
7079 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7080 {
7081 int err = 0;
7082 struct iwl_priv *priv;
7083 struct ieee80211_hw *hw;
7084 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7085 unsigned long flags;
7086 DECLARE_MAC_BUF(mac);
7087
7088 /************************
7089 * 1. Allocating HW data
7090 ************************/
7091
7092 /* Disabling hardware scan means that mac80211 will perform scans
7093 * "the hard way", rather than using device's scan. */
7094 if (cfg->mod_params->disable_hw_scan) {
7095 IWL_DEBUG_INFO("Disabling hw_scan\n");
7096 iwl4965_hw_ops.hw_scan = NULL;
7097 }
7098
7099 hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7100 if (!hw) {
7101 err = -ENOMEM;
7102 goto out;
7103 }
7104 priv = hw->priv;
7105 /* At this point both hw and priv are allocated. */
7106
7107 SET_IEEE80211_DEV(hw, &pdev->dev);
7108
7109 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7110 priv->cfg = cfg;
7111 priv->pci_dev = pdev;
7112
7113 #ifdef CONFIG_IWLWIFI_DEBUG
7114 iwl_debug_level = priv->cfg->mod_params->debug;
7115 atomic_set(&priv->restrict_refcnt, 0);
7116 #endif
7117
7118 /**************************
7119 * 2. Initializing PCI bus
7120 **************************/
7121 if (pci_enable_device(pdev)) {
7122 err = -ENODEV;
7123 goto out_ieee80211_free_hw;
7124 }
7125
7126 pci_set_master(pdev);
7127
7128 err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
7129 if (!err)
7130 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
7131 if (err) {
7132 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7133 if (!err)
7134 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7135 /* both attempts failed: */
7136 if (err) {
7137 printk(KERN_WARNING "%s: No suitable DMA available.\n",
7138 DRV_NAME);
7139 goto out_pci_disable_device;
7140 }
7141 }
7142
7143 err = pci_request_regions(pdev, DRV_NAME);
7144 if (err)
7145 goto out_pci_disable_device;
7146
7147 pci_set_drvdata(pdev, priv);
7148
7149 /* We disable the RETRY_TIMEOUT register (0x41) to keep
7150 * PCI Tx retries from interfering with C3 CPU state */
7151 pci_write_config_byte(pdev, 0x41, 0x00);
7152
7153 /***********************
7154 * 3. Read REV register
7155 ***********************/
7156 priv->hw_base = pci_iomap(pdev, 0, 0);
7157 if (!priv->hw_base) {
7158 err = -ENODEV;
7159 goto out_pci_release_regions;
7160 }
7161
7162 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7163 (unsigned long long) pci_resource_len(pdev, 0));
7164 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7165
7166 iwl_hw_detect(priv);
7167 printk(KERN_INFO DRV_NAME
7168 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
7169 priv->cfg->name, priv->hw_rev);
7170
7171 /* amp init */
7172 err = priv->cfg->ops->lib->apm_ops.init(priv);
7173 if (err < 0) {
7174 IWL_DEBUG_INFO("Failed to init APMG\n");
7175 goto out_iounmap;
7176 }
7177 /*****************
7178 * 4. Read EEPROM
7179 *****************/
7180 /* Read the EEPROM */
7181 err = iwl_eeprom_init(priv);
7182 if (err) {
7183 IWL_ERROR("Unable to init EEPROM\n");
7184 goto out_iounmap;
7185 }
7186 err = iwl_eeprom_check_version(priv);
7187 if (err)
7188 goto out_iounmap;
7189
7190 /* MAC Address location in EEPROM same for 3945/4965 */
7191 iwl_eeprom_get_mac(priv, priv->mac_addr);
7192 IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7193 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7194
7195 /************************
7196 * 5. Setup HW constants
7197 ************************/
7198 /* Device-specific setup */
7199 if (priv->cfg->ops->lib->set_hw_params(priv)) {
7200 IWL_ERROR("failed to set hw parameters\n");
7201 goto out_free_eeprom;
7202 }
7203
7204 /*******************
7205 * 6. Setup hw/priv
7206 *******************/
7207
7208 err = iwl_setup(priv);
7209 if (err)
7210 goto out_free_eeprom;
7211 /* At this point both hw and priv are initialized. */
7212
7213 /**********************************
7214 * 7. Initialize module parameters
7215 **********************************/
7216
7217 /* Disable radio (SW RF KILL) via parameter when loading driver */
7218 if (priv->cfg->mod_params->disable) {
7219 set_bit(STATUS_RF_KILL_SW, &priv->status);
7220 IWL_DEBUG_INFO("Radio disabled.\n");
7221 }
7222
7223 if (priv->cfg->mod_params->enable_qos)
7224 priv->qos_data.qos_enable = 1;
7225
7226 /********************
7227 * 8. Setup services
7228 ********************/
7229 spin_lock_irqsave(&priv->lock, flags);
7230 iwl4965_disable_interrupts(priv);
7231 spin_unlock_irqrestore(&priv->lock, flags);
7232
7233 err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7234 if (err) {
7235 IWL_ERROR("failed to create sysfs device attributes\n");
7236 goto out_free_eeprom;
7237 }
7238
7239 err = iwl_dbgfs_register(priv, DRV_NAME);
7240 if (err) {
7241 IWL_ERROR("failed to create debugfs files\n");
7242 goto out_remove_sysfs;
7243 }
7244
7245 iwl4965_setup_deferred_work(priv);
7246 iwl4965_setup_rx_handlers(priv);
7247
7248 /********************
7249 * 9. Conclude
7250 ********************/
7251 pci_save_state(pdev);
7252 pci_disable_device(pdev);
7253
7254 /* notify iwlcore to init */
7255 iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7256 return 0;
7257
7258 out_remove_sysfs:
7259 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7260 out_free_eeprom:
7261 iwl_eeprom_free(priv);
7262 out_iounmap:
7263 pci_iounmap(pdev, priv->hw_base);
7264 out_pci_release_regions:
7265 pci_release_regions(pdev);
7266 pci_set_drvdata(pdev, NULL);
7267 out_pci_disable_device:
7268 pci_disable_device(pdev);
7269 out_ieee80211_free_hw:
7270 ieee80211_free_hw(priv->hw);
7271 out:
7272 return err;
7273 }
7274
7275 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7276 {
7277 struct iwl_priv *priv = pci_get_drvdata(pdev);
7278 struct list_head *p, *q;
7279 int i;
7280 unsigned long flags;
7281
7282 if (!priv)
7283 return;
7284
7285 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7286
7287 if (priv->mac80211_registered) {
7288 ieee80211_unregister_hw(priv->hw);
7289 priv->mac80211_registered = 0;
7290 }
7291
7292 set_bit(STATUS_EXIT_PENDING, &priv->status);
7293
7294 iwl4965_down(priv);
7295
7296 /* make sure we flush any pending irq or
7297 * tasklet for the driver
7298 */
7299 spin_lock_irqsave(&priv->lock, flags);
7300 iwl4965_disable_interrupts(priv);
7301 spin_unlock_irqrestore(&priv->lock, flags);
7302
7303 iwl_synchronize_irq(priv);
7304
7305 /* Free MAC hash list for ADHOC */
7306 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7307 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7308 list_del(p);
7309 kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7310 }
7311 }
7312
7313 iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7314 iwl_dbgfs_unregister(priv);
7315 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7316
7317 iwl4965_dealloc_ucode_pci(priv);
7318
7319 if (priv->rxq.bd)
7320 iwl4965_rx_queue_free(priv, &priv->rxq);
7321 iwl4965_hw_txq_ctx_free(priv);
7322
7323 iwlcore_clear_stations_table(priv);
7324 iwl_eeprom_free(priv);
7325
7326
7327 /*netif_stop_queue(dev); */
7328 flush_workqueue(priv->workqueue);
7329
7330 /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7331 * priv->workqueue... so we can't take down the workqueue
7332 * until now... */
7333 destroy_workqueue(priv->workqueue);
7334 priv->workqueue = NULL;
7335
7336 pci_iounmap(pdev, priv->hw_base);
7337 pci_release_regions(pdev);
7338 pci_disable_device(pdev);
7339 pci_set_drvdata(pdev, NULL);
7340
7341 iwl_free_channel_map(priv);
7342 iwlcore_free_geos(priv);
7343
7344 if (priv->ibss_beacon)
7345 dev_kfree_skb(priv->ibss_beacon);
7346
7347 ieee80211_free_hw(priv->hw);
7348 }
7349
7350 #ifdef CONFIG_PM
7351
7352 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7353 {
7354 struct iwl_priv *priv = pci_get_drvdata(pdev);
7355
7356 if (priv->is_open) {
7357 set_bit(STATUS_IN_SUSPEND, &priv->status);
7358 iwl4965_mac_stop(priv->hw);
7359 priv->is_open = 1;
7360 }
7361
7362 pci_set_power_state(pdev, PCI_D3hot);
7363
7364 return 0;
7365 }
7366
7367 static int iwl4965_pci_resume(struct pci_dev *pdev)
7368 {
7369 struct iwl_priv *priv = pci_get_drvdata(pdev);
7370
7371 pci_set_power_state(pdev, PCI_D0);
7372
7373 if (priv->is_open)
7374 iwl4965_mac_start(priv->hw);
7375
7376 clear_bit(STATUS_IN_SUSPEND, &priv->status);
7377 return 0;
7378 }
7379
7380 #endif /* CONFIG_PM */
7381
7382 /*****************************************************************************
7383 *
7384 * driver and module entry point
7385 *
7386 *****************************************************************************/
7387
7388 /* Hardware specific file defines the PCI IDs table for that hardware module */
7389 static struct pci_device_id iwl_hw_card_ids[] = {
7390 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7391 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7392 #ifdef CONFIG_IWL5000
7393 {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
7394 {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
7395 {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
7396 #endif /* CONFIG_IWL5000 */
7397 {0}
7398 };
7399 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7400
7401 static struct pci_driver iwl_driver = {
7402 .name = DRV_NAME,
7403 .id_table = iwl_hw_card_ids,
7404 .probe = iwl4965_pci_probe,
7405 .remove = __devexit_p(iwl4965_pci_remove),
7406 #ifdef CONFIG_PM
7407 .suspend = iwl4965_pci_suspend,
7408 .resume = iwl4965_pci_resume,
7409 #endif
7410 };
7411
7412 static int __init iwl4965_init(void)
7413 {
7414
7415 int ret;
7416 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7417 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7418
7419 ret = iwl4965_rate_control_register();
7420 if (ret) {
7421 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7422 return ret;
7423 }
7424
7425 ret = pci_register_driver(&iwl_driver);
7426 if (ret) {
7427 IWL_ERROR("Unable to initialize PCI module\n");
7428 goto error_register;
7429 }
7430 #ifdef CONFIG_IWLWIFI_DEBUG
7431 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7432 if (ret) {
7433 IWL_ERROR("Unable to create driver sysfs file\n");
7434 goto error_debug;
7435 }
7436 #endif
7437
7438 return ret;
7439
7440 #ifdef CONFIG_IWLWIFI_DEBUG
7441 error_debug:
7442 pci_unregister_driver(&iwl_driver);
7443 #endif
7444 error_register:
7445 iwl4965_rate_control_unregister();
7446 return ret;
7447 }
7448
7449 static void __exit iwl4965_exit(void)
7450 {
7451 #ifdef CONFIG_IWLWIFI_DEBUG
7452 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7453 #endif
7454 pci_unregister_driver(&iwl_driver);
7455 iwl4965_rate_control_unregister();
7456 }
7457
7458 module_exit(iwl4965_exit);
7459 module_init(iwl4965_init);
Linux kernel - Deliverables
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