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4406fc72d881f811f314b9ddce23e15d14235393
[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-dev.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
2526 if (in_interrupt())
2527 ieee80211_tx_status_irqsafe(priv->hw,
2528 tx_sta->skb[0], &(tx_sta->status));
2529 else
2530 ieee80211_tx_status(priv->hw,
2531 tx_sta->skb[0], &(tx_sta->status));
2532
2533 tx_sta->skb[0] = NULL;
2534 }
2535
2536 /**
2537 * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2538 *
2539 * When FW advances 'R' index, all entries between old and new 'R' index
2540 * need to be reclaimed. As result, some free space forms. If there is
2541 * enough free space (> low mark), wake the stack that feeds us.
2542 */
2543 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2544 {
2545 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2546 struct iwl4965_queue *q = &txq->q;
2547 int nfreed = 0;
2548
2549 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2550 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2551 "is out of range [0-%d] %d %d.\n", txq_id,
2552 index, q->n_bd, q->write_ptr, q->read_ptr);
2553 return 0;
2554 }
2555
2556 for (index = iwl_queue_inc_wrap(index, q->n_bd);
2557 q->read_ptr != index;
2558 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2559 if (txq_id != IWL_CMD_QUEUE_NUM) {
2560 iwl4965_txstatus_to_ieee(priv,
2561 &(txq->txb[txq->q.read_ptr]));
2562 iwl4965_hw_txq_free_tfd(priv, txq);
2563 } else if (nfreed > 1) {
2564 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2565 q->write_ptr, q->read_ptr);
2566 queue_work(priv->workqueue, &priv->restart);
2567 }
2568 nfreed++;
2569 }
2570
2571 /* if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2572 (txq_id != IWL_CMD_QUEUE_NUM) &&
2573 priv->mac80211_registered)
2574 ieee80211_wake_queue(priv->hw, txq_id); */
2575
2576
2577 return nfreed;
2578 }
2579
2580 static int iwl4965_is_tx_success(u32 status)
2581 {
2582 status &= TX_STATUS_MSK;
2583 return (status == TX_STATUS_SUCCESS)
2584 || (status == TX_STATUS_DIRECT_DONE);
2585 }
2586
2587 /******************************************************************************
2588 *
2589 * Generic RX handler implementations
2590 *
2591 ******************************************************************************/
2592 #ifdef CONFIG_IWL4965_HT
2593
2594 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2595 struct ieee80211_hdr *hdr)
2596 {
2597 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2598 return IWL_AP_ID;
2599 else {
2600 u8 *da = ieee80211_get_DA(hdr);
2601 return iwl_find_station(priv, da);
2602 }
2603 }
2604
2605 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2606 struct iwl_priv *priv, int txq_id, int idx)
2607 {
2608 if (priv->txq[txq_id].txb[idx].skb[0])
2609 return (struct ieee80211_hdr *)priv->txq[txq_id].
2610 txb[idx].skb[0]->data;
2611 return NULL;
2612 }
2613
2614 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2615 {
2616 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2617 tx_resp->frame_count);
2618 return le32_to_cpu(*scd_ssn) & MAX_SN;
2619
2620 }
2621
2622 /**
2623 * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2624 */
2625 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2626 struct iwl4965_ht_agg *agg,
2627 struct iwl4965_tx_resp_agg *tx_resp,
2628 u16 start_idx)
2629 {
2630 u16 status;
2631 struct agg_tx_status *frame_status = &tx_resp->status;
2632 struct ieee80211_tx_status *tx_status = NULL;
2633 struct ieee80211_hdr *hdr = NULL;
2634 int i, sh;
2635 int txq_id, idx;
2636 u16 seq;
2637
2638 if (agg->wait_for_ba)
2639 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2640
2641 agg->frame_count = tx_resp->frame_count;
2642 agg->start_idx = start_idx;
2643 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2644 agg->bitmap = 0;
2645
2646 /* # frames attempted by Tx command */
2647 if (agg->frame_count == 1) {
2648 /* Only one frame was attempted; no block-ack will arrive */
2649 status = le16_to_cpu(frame_status[0].status);
2650 seq = le16_to_cpu(frame_status[0].sequence);
2651 idx = SEQ_TO_INDEX(seq);
2652 txq_id = SEQ_TO_QUEUE(seq);
2653
2654 /* FIXME: code repetition */
2655 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2656 agg->frame_count, agg->start_idx, idx);
2657
2658 tx_status = &(priv->txq[txq_id].txb[idx].status);
2659 tx_status->retry_count = tx_resp->failure_frame;
2660 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2661 tx_status->flags = iwl4965_is_tx_success(status)?
2662 IEEE80211_TX_STATUS_ACK : 0;
2663 iwl4965_hwrate_to_tx_control(priv,
2664 le32_to_cpu(tx_resp->rate_n_flags),
2665 &tx_status->control);
2666 /* FIXME: code repetition end */
2667
2668 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2669 status & 0xff, tx_resp->failure_frame);
2670 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2671 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2672
2673 agg->wait_for_ba = 0;
2674 } else {
2675 /* Two or more frames were attempted; expect block-ack */
2676 u64 bitmap = 0;
2677 int start = agg->start_idx;
2678
2679 /* Construct bit-map of pending frames within Tx window */
2680 for (i = 0; i < agg->frame_count; i++) {
2681 u16 sc;
2682 status = le16_to_cpu(frame_status[i].status);
2683 seq = le16_to_cpu(frame_status[i].sequence);
2684 idx = SEQ_TO_INDEX(seq);
2685 txq_id = SEQ_TO_QUEUE(seq);
2686
2687 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2688 AGG_TX_STATE_ABORT_MSK))
2689 continue;
2690
2691 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2692 agg->frame_count, txq_id, idx);
2693
2694 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2695
2696 sc = le16_to_cpu(hdr->seq_ctrl);
2697 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2698 IWL_ERROR("BUG_ON idx doesn't match seq control"
2699 " idx=%d, seq_idx=%d, seq=%d\n",
2700 idx, SEQ_TO_SN(sc),
2701 hdr->seq_ctrl);
2702 return -1;
2703 }
2704
2705 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2706 i, idx, SEQ_TO_SN(sc));
2707
2708 sh = idx - start;
2709 if (sh > 64) {
2710 sh = (start - idx) + 0xff;
2711 bitmap = bitmap << sh;
2712 sh = 0;
2713 start = idx;
2714 } else if (sh < -64)
2715 sh = 0xff - (start - idx);
2716 else if (sh < 0) {
2717 sh = start - idx;
2718 start = idx;
2719 bitmap = bitmap << sh;
2720 sh = 0;
2721 }
2722 bitmap |= (1 << sh);
2723 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2724 start, (u32)(bitmap & 0xFFFFFFFF));
2725 }
2726
2727 agg->bitmap = bitmap;
2728 agg->start_idx = start;
2729 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2730 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2731 agg->frame_count, agg->start_idx,
2732 (unsigned long long)agg->bitmap);
2733
2734 if (bitmap)
2735 agg->wait_for_ba = 1;
2736 }
2737 return 0;
2738 }
2739 #endif
2740
2741 /**
2742 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2743 */
2744 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2745 struct iwl4965_rx_mem_buffer *rxb)
2746 {
2747 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2748 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2749 int txq_id = SEQ_TO_QUEUE(sequence);
2750 int index = SEQ_TO_INDEX(sequence);
2751 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2752 struct ieee80211_tx_status *tx_status;
2753 struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2754 u32 status = le32_to_cpu(tx_resp->status);
2755 #ifdef CONFIG_IWL4965_HT
2756 int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2757 struct ieee80211_hdr *hdr;
2758 __le16 *qc;
2759 #endif
2760
2761 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2762 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2763 "is out of range [0-%d] %d %d\n", txq_id,
2764 index, txq->q.n_bd, txq->q.write_ptr,
2765 txq->q.read_ptr);
2766 return;
2767 }
2768
2769 #ifdef CONFIG_IWL4965_HT
2770 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2771 qc = ieee80211_get_qos_ctrl(hdr);
2772
2773 if (qc)
2774 tid = le16_to_cpu(*qc) & 0xf;
2775
2776 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2777 if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2778 IWL_ERROR("Station not known\n");
2779 return;
2780 }
2781
2782 if (txq->sched_retry) {
2783 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2784 struct iwl4965_ht_agg *agg = NULL;
2785
2786 if (!qc)
2787 return;
2788
2789 agg = &priv->stations[sta_id].tid[tid].agg;
2790
2791 iwl4965_tx_status_reply_tx(priv, agg,
2792 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2793
2794 if ((tx_resp->frame_count == 1) &&
2795 !iwl4965_is_tx_success(status)) {
2796 /* TODO: send BAR */
2797 }
2798
2799 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2800 int freed;
2801 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2802 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2803 "%d index %d\n", scd_ssn , index);
2804 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2805 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2806
2807 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2808 txq_id >= 0 && priv->mac80211_registered &&
2809 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2810 ieee80211_wake_queue(priv->hw, txq_id);
2811
2812 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2813 }
2814 } else {
2815 #endif /* CONFIG_IWL4965_HT */
2816 tx_status = &(txq->txb[txq->q.read_ptr].status);
2817
2818 tx_status->retry_count = tx_resp->failure_frame;
2819 tx_status->flags =
2820 iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2821 iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2822 &tx_status->control);
2823
2824 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2825 "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2826 status, le32_to_cpu(tx_resp->rate_n_flags),
2827 tx_resp->failure_frame);
2828
2829 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2830 if (index != -1) {
2831 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2832 #ifdef CONFIG_IWL4965_HT
2833 if (tid != MAX_TID_COUNT)
2834 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2835 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2836 (txq_id >= 0) &&
2837 priv->mac80211_registered)
2838 ieee80211_wake_queue(priv->hw, txq_id);
2839 if (tid != MAX_TID_COUNT)
2840 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2841 #endif
2842 }
2843 #ifdef CONFIG_IWL4965_HT
2844 }
2845 #endif /* CONFIG_IWL4965_HT */
2846
2847 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2848 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
2849 }
2850
2851
2852 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2853 struct iwl4965_rx_mem_buffer *rxb)
2854 {
2855 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2856 struct iwl4965_alive_resp *palive;
2857 struct delayed_work *pwork;
2858
2859 palive = &pkt->u.alive_frame;
2860
2861 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2862 "0x%01X 0x%01X\n",
2863 palive->is_valid, palive->ver_type,
2864 palive->ver_subtype);
2865
2866 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2867 IWL_DEBUG_INFO("Initialization Alive received.\n");
2868 memcpy(&priv->card_alive_init,
2869 &pkt->u.alive_frame,
2870 sizeof(struct iwl4965_init_alive_resp));
2871 pwork = &priv->init_alive_start;
2872 } else {
2873 IWL_DEBUG_INFO("Runtime Alive received.\n");
2874 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2875 sizeof(struct iwl4965_alive_resp));
2876 pwork = &priv->alive_start;
2877 }
2878
2879 /* We delay the ALIVE response by 5ms to
2880 * give the HW RF Kill time to activate... */
2881 if (palive->is_valid == UCODE_VALID_OK)
2882 queue_delayed_work(priv->workqueue, pwork,
2883 msecs_to_jiffies(5));
2884 else
2885 IWL_WARNING("uCode did not respond OK.\n");
2886 }
2887
2888 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2889 struct iwl4965_rx_mem_buffer *rxb)
2890 {
2891 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2892
2893 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2894 return;
2895 }
2896
2897 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2898 struct iwl4965_rx_mem_buffer *rxb)
2899 {
2900 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2901
2902 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2903 "seq 0x%04X ser 0x%08X\n",
2904 le32_to_cpu(pkt->u.err_resp.error_type),
2905 get_cmd_string(pkt->u.err_resp.cmd_id),
2906 pkt->u.err_resp.cmd_id,
2907 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2908 le32_to_cpu(pkt->u.err_resp.error_info));
2909 }
2910
2911 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2912
2913 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
2914 {
2915 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2916 struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2917 struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2918 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2919 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2920 rxon->channel = csa->channel;
2921 priv->staging_rxon.channel = csa->channel;
2922 }
2923
2924 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2925 struct iwl4965_rx_mem_buffer *rxb)
2926 {
2927 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2928 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2929 struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2930
2931 if (!report->state) {
2932 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2933 "Spectrum Measure Notification: Start\n");
2934 return;
2935 }
2936
2937 memcpy(&priv->measure_report, report, sizeof(*report));
2938 priv->measurement_status |= MEASUREMENT_READY;
2939 #endif
2940 }
2941
2942 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2943 struct iwl4965_rx_mem_buffer *rxb)
2944 {
2945 #ifdef CONFIG_IWLWIFI_DEBUG
2946 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2947 struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2948 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2949 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2950 #endif
2951 }
2952
2953 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2954 struct iwl4965_rx_mem_buffer *rxb)
2955 {
2956 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2957 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2958 "notification for %s:\n",
2959 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2960 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2961 }
2962
2963 static void iwl4965_bg_beacon_update(struct work_struct *work)
2964 {
2965 struct iwl_priv *priv =
2966 container_of(work, struct iwl_priv, beacon_update);
2967 struct sk_buff *beacon;
2968
2969 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2970 beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2971
2972 if (!beacon) {
2973 IWL_ERROR("update beacon failed\n");
2974 return;
2975 }
2976
2977 mutex_lock(&priv->mutex);
2978 /* new beacon skb is allocated every time; dispose previous.*/
2979 if (priv->ibss_beacon)
2980 dev_kfree_skb(priv->ibss_beacon);
2981
2982 priv->ibss_beacon = beacon;
2983 mutex_unlock(&priv->mutex);
2984
2985 iwl4965_send_beacon_cmd(priv);
2986 }
2987
2988 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2989 struct iwl4965_rx_mem_buffer *rxb)
2990 {
2991 #ifdef CONFIG_IWLWIFI_DEBUG
2992 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2993 struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
2994 u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
2995
2996 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2997 "tsf %d %d rate %d\n",
2998 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2999 beacon->beacon_notify_hdr.failure_frame,
3000 le32_to_cpu(beacon->ibss_mgr_status),
3001 le32_to_cpu(beacon->high_tsf),
3002 le32_to_cpu(beacon->low_tsf), rate);
3003 #endif
3004
3005 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3006 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3007 queue_work(priv->workqueue, &priv->beacon_update);
3008 }
3009
3010 /* Service response to REPLY_SCAN_CMD (0x80) */
3011 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3012 struct iwl4965_rx_mem_buffer *rxb)
3013 {
3014 #ifdef CONFIG_IWLWIFI_DEBUG
3015 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3016 struct iwl4965_scanreq_notification *notif =
3017 (struct iwl4965_scanreq_notification *)pkt->u.raw;
3018
3019 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3020 #endif
3021 }
3022
3023 /* Service SCAN_START_NOTIFICATION (0x82) */
3024 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3025 struct iwl4965_rx_mem_buffer *rxb)
3026 {
3027 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3028 struct iwl4965_scanstart_notification *notif =
3029 (struct iwl4965_scanstart_notification *)pkt->u.raw;
3030 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3031 IWL_DEBUG_SCAN("Scan start: "
3032 "%d [802.11%s] "
3033 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3034 notif->channel,
3035 notif->band ? "bg" : "a",
3036 notif->tsf_high,
3037 notif->tsf_low, notif->status, notif->beacon_timer);
3038 }
3039
3040 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3041 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3042 struct iwl4965_rx_mem_buffer *rxb)
3043 {
3044 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3045 struct iwl4965_scanresults_notification *notif =
3046 (struct iwl4965_scanresults_notification *)pkt->u.raw;
3047
3048 IWL_DEBUG_SCAN("Scan ch.res: "
3049 "%d [802.11%s] "
3050 "(TSF: 0x%08X:%08X) - %d "
3051 "elapsed=%lu usec (%dms since last)\n",
3052 notif->channel,
3053 notif->band ? "bg" : "a",
3054 le32_to_cpu(notif->tsf_high),
3055 le32_to_cpu(notif->tsf_low),
3056 le32_to_cpu(notif->statistics[0]),
3057 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3058 jiffies_to_msecs(elapsed_jiffies
3059 (priv->last_scan_jiffies, jiffies)));
3060
3061 priv->last_scan_jiffies = jiffies;
3062 priv->next_scan_jiffies = 0;
3063 }
3064
3065 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3066 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3067 struct iwl4965_rx_mem_buffer *rxb)
3068 {
3069 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3070 struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3071
3072 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3073 scan_notif->scanned_channels,
3074 scan_notif->tsf_low,
3075 scan_notif->tsf_high, scan_notif->status);
3076
3077 /* The HW is no longer scanning */
3078 clear_bit(STATUS_SCAN_HW, &priv->status);
3079
3080 /* The scan completion notification came in, so kill that timer... */
3081 cancel_delayed_work(&priv->scan_check);
3082
3083 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3084 (priv->scan_bands == 2) ? "2.4" : "5.2",
3085 jiffies_to_msecs(elapsed_jiffies
3086 (priv->scan_pass_start, jiffies)));
3087
3088 /* Remove this scanned band from the list
3089 * of pending bands to scan */
3090 priv->scan_bands--;
3091
3092 /* If a request to abort was given, or the scan did not succeed
3093 * then we reset the scan state machine and terminate,
3094 * re-queuing another scan if one has been requested */
3095 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3096 IWL_DEBUG_INFO("Aborted scan completed.\n");
3097 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3098 } else {
3099 /* If there are more bands on this scan pass reschedule */
3100 if (priv->scan_bands > 0)
3101 goto reschedule;
3102 }
3103
3104 priv->last_scan_jiffies = jiffies;
3105 priv->next_scan_jiffies = 0;
3106 IWL_DEBUG_INFO("Setting scan to off\n");
3107
3108 clear_bit(STATUS_SCANNING, &priv->status);
3109
3110 IWL_DEBUG_INFO("Scan took %dms\n",
3111 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3112
3113 queue_work(priv->workqueue, &priv->scan_completed);
3114
3115 return;
3116
3117 reschedule:
3118 priv->scan_pass_start = jiffies;
3119 queue_work(priv->workqueue, &priv->request_scan);
3120 }
3121
3122 /* Handle notification from uCode that card's power state is changing
3123 * due to software, hardware, or critical temperature RFKILL */
3124 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3125 struct iwl4965_rx_mem_buffer *rxb)
3126 {
3127 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3128 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3129 unsigned long status = priv->status;
3130
3131 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3132 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3133 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3134
3135 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3136 RF_CARD_DISABLED)) {
3137
3138 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3139 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3140
3141 if (!iwl_grab_nic_access(priv)) {
3142 iwl_write_direct32(
3143 priv, HBUS_TARG_MBX_C,
3144 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3145
3146 iwl_release_nic_access(priv);
3147 }
3148
3149 if (!(flags & RXON_CARD_DISABLED)) {
3150 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3151 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3152 if (!iwl_grab_nic_access(priv)) {
3153 iwl_write_direct32(
3154 priv, HBUS_TARG_MBX_C,
3155 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3156
3157 iwl_release_nic_access(priv);
3158 }
3159 }
3160
3161 if (flags & RF_CARD_DISABLED) {
3162 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3163 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3164 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3165 if (!iwl_grab_nic_access(priv))
3166 iwl_release_nic_access(priv);
3167 }
3168 }
3169
3170 if (flags & HW_CARD_DISABLED)
3171 set_bit(STATUS_RF_KILL_HW, &priv->status);
3172 else
3173 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3174
3175
3176 if (flags & SW_CARD_DISABLED)
3177 set_bit(STATUS_RF_KILL_SW, &priv->status);
3178 else
3179 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3180
3181 if (!(flags & RXON_CARD_DISABLED))
3182 iwl4965_scan_cancel(priv);
3183
3184 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3185 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3186 (test_bit(STATUS_RF_KILL_SW, &status) !=
3187 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3188 queue_work(priv->workqueue, &priv->rf_kill);
3189 else
3190 wake_up_interruptible(&priv->wait_command_queue);
3191 }
3192
3193 /**
3194 * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3195 *
3196 * Setup the RX handlers for each of the reply types sent from the uCode
3197 * to the host.
3198 *
3199 * This function chains into the hardware specific files for them to setup
3200 * any hardware specific handlers as well.
3201 */
3202 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3203 {
3204 priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3205 priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3206 priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3207 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3208 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3209 iwl4965_rx_spectrum_measure_notif;
3210 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3211 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3212 iwl4965_rx_pm_debug_statistics_notif;
3213 priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3214
3215 /*
3216 * The same handler is used for both the REPLY to a discrete
3217 * statistics request from the host as well as for the periodic
3218 * statistics notifications (after received beacons) from the uCode.
3219 */
3220 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3221 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3222
3223 priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3224 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3225 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3226 iwl4965_rx_scan_results_notif;
3227 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3228 iwl4965_rx_scan_complete_notif;
3229 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3230 priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3231
3232 /* Set up hardware specific Rx handlers */
3233 priv->cfg->ops->lib->rx_handler_setup(priv);
3234 }
3235
3236 /**
3237 * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3238 * @rxb: Rx buffer to reclaim
3239 *
3240 * If an Rx buffer has an async callback associated with it the callback
3241 * will be executed. The attached skb (if present) will only be freed
3242 * if the callback returns 1
3243 */
3244 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3245 struct iwl4965_rx_mem_buffer *rxb)
3246 {
3247 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3248 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3249 int txq_id = SEQ_TO_QUEUE(sequence);
3250 int index = SEQ_TO_INDEX(sequence);
3251 int huge = sequence & SEQ_HUGE_FRAME;
3252 int cmd_index;
3253 struct iwl_cmd *cmd;
3254
3255 /* If a Tx command is being handled and it isn't in the actual
3256 * command queue then there a command routing bug has been introduced
3257 * in the queue management code. */
3258 if (txq_id != IWL_CMD_QUEUE_NUM)
3259 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3260 txq_id, pkt->hdr.cmd);
3261 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3262
3263 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3264 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3265
3266 /* Input error checking is done when commands are added to queue. */
3267 if (cmd->meta.flags & CMD_WANT_SKB) {
3268 cmd->meta.source->u.skb = rxb->skb;
3269 rxb->skb = NULL;
3270 } else if (cmd->meta.u.callback &&
3271 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3272 rxb->skb = NULL;
3273
3274 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3275
3276 if (!(cmd->meta.flags & CMD_ASYNC)) {
3277 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3278 wake_up_interruptible(&priv->wait_command_queue);
3279 }
3280 }
3281
3282 /************************** RX-FUNCTIONS ****************************/
3283 /*
3284 * Rx theory of operation
3285 *
3286 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3287 * each of which point to Receive Buffers to be filled by 4965. These get
3288 * used not only for Rx frames, but for any command response or notification
3289 * from the 4965. The driver and 4965 manage the Rx buffers by means
3290 * of indexes into the circular buffer.
3291 *
3292 * Rx Queue Indexes
3293 * The host/firmware share two index registers for managing the Rx buffers.
3294 *
3295 * The READ index maps to the first position that the firmware may be writing
3296 * to -- the driver can read up to (but not including) this position and get
3297 * good data.
3298 * The READ index is managed by the firmware once the card is enabled.
3299 *
3300 * The WRITE index maps to the last position the driver has read from -- the
3301 * position preceding WRITE is the last slot the firmware can place a packet.
3302 *
3303 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3304 * WRITE = READ.
3305 *
3306 * During initialization, the host sets up the READ queue position to the first
3307 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3308 *
3309 * When the firmware places a packet in a buffer, it will advance the READ index
3310 * and fire the RX interrupt. The driver can then query the READ index and
3311 * process as many packets as possible, moving the WRITE index forward as it
3312 * resets the Rx queue buffers with new memory.
3313 *
3314 * The management in the driver is as follows:
3315 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3316 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3317 * to replenish the iwl->rxq->rx_free.
3318 * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3319 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3320 * 'processed' and 'read' driver indexes as well)
3321 * + A received packet is processed and handed to the kernel network stack,
3322 * detached from the iwl->rxq. The driver 'processed' index is updated.
3323 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3324 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3325 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3326 * were enough free buffers and RX_STALLED is set it is cleared.
3327 *
3328 *
3329 * Driver sequence:
3330 *
3331 * iwl4965_rx_queue_alloc() Allocates rx_free
3332 * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
3333 * iwl4965_rx_queue_restock
3334 * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3335 * queue, updates firmware pointers, and updates
3336 * the WRITE index. If insufficient rx_free buffers
3337 * are available, schedules iwl4965_rx_replenish
3338 *
3339 * -- enable interrupts --
3340 * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
3341 * READ INDEX, detaching the SKB from the pool.
3342 * Moves the packet buffer from queue to rx_used.
3343 * Calls iwl4965_rx_queue_restock to refill any empty
3344 * slots.
3345 * ...
3346 *
3347 */
3348
3349 /**
3350 * iwl4965_rx_queue_space - Return number of free slots available in queue.
3351 */
3352 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3353 {
3354 int s = q->read - q->write;
3355 if (s <= 0)
3356 s += RX_QUEUE_SIZE;
3357 /* keep some buffer to not confuse full and empty queue */
3358 s -= 2;
3359 if (s < 0)
3360 s = 0;
3361 return s;
3362 }
3363
3364 /**
3365 * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3366 */
3367 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3368 {
3369 u32 reg = 0;
3370 int rc = 0;
3371 unsigned long flags;
3372
3373 spin_lock_irqsave(&q->lock, flags);
3374
3375 if (q->need_update == 0)
3376 goto exit_unlock;
3377
3378 /* If power-saving is in use, make sure device is awake */
3379 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3380 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3381
3382 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3383 iwl_set_bit(priv, CSR_GP_CNTRL,
3384 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3385 goto exit_unlock;
3386 }
3387
3388 rc = iwl_grab_nic_access(priv);
3389 if (rc)
3390 goto exit_unlock;
3391
3392 /* Device expects a multiple of 8 */
3393 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3394 q->write & ~0x7);
3395 iwl_release_nic_access(priv);
3396
3397 /* Else device is assumed to be awake */
3398 } else
3399 /* Device expects a multiple of 8 */
3400 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3401
3402
3403 q->need_update = 0;
3404
3405 exit_unlock:
3406 spin_unlock_irqrestore(&q->lock, flags);
3407 return rc;
3408 }
3409
3410 /**
3411 * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3412 */
3413 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3414 dma_addr_t dma_addr)
3415 {
3416 return cpu_to_le32((u32)(dma_addr >> 8));
3417 }
3418
3419
3420 /**
3421 * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3422 *
3423 * If there are slots in the RX queue that need to be restocked,
3424 * and we have free pre-allocated buffers, fill the ranks as much
3425 * as we can, pulling from rx_free.
3426 *
3427 * This moves the 'write' index forward to catch up with 'processed', and
3428 * also updates the memory address in the firmware to reference the new
3429 * target buffer.
3430 */
3431 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3432 {
3433 struct iwl4965_rx_queue *rxq = &priv->rxq;
3434 struct list_head *element;
3435 struct iwl4965_rx_mem_buffer *rxb;
3436 unsigned long flags;
3437 int write, rc;
3438
3439 spin_lock_irqsave(&rxq->lock, flags);
3440 write = rxq->write & ~0x7;
3441 while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3442 /* Get next free Rx buffer, remove from free list */
3443 element = rxq->rx_free.next;
3444 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3445 list_del(element);
3446
3447 /* Point to Rx buffer via next RBD in circular buffer */
3448 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3449 rxq->queue[rxq->write] = rxb;
3450 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3451 rxq->free_count--;
3452 }
3453 spin_unlock_irqrestore(&rxq->lock, flags);
3454 /* If the pre-allocated buffer pool is dropping low, schedule to
3455 * refill it */
3456 if (rxq->free_count <= RX_LOW_WATERMARK)
3457 queue_work(priv->workqueue, &priv->rx_replenish);
3458
3459
3460 /* If we've added more space for the firmware to place data, tell it.
3461 * Increment device's write pointer in multiples of 8. */
3462 if ((write != (rxq->write & ~0x7))
3463 || (abs(rxq->write - rxq->read) > 7)) {
3464 spin_lock_irqsave(&rxq->lock, flags);
3465 rxq->need_update = 1;
3466 spin_unlock_irqrestore(&rxq->lock, flags);
3467 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3468 if (rc)
3469 return rc;
3470 }
3471
3472 return 0;
3473 }
3474
3475 /**
3476 * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3477 *
3478 * When moving to rx_free an SKB is allocated for the slot.
3479 *
3480 * Also restock the Rx queue via iwl4965_rx_queue_restock.
3481 * This is called as a scheduled work item (except for during initialization)
3482 */
3483 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3484 {
3485 struct iwl4965_rx_queue *rxq = &priv->rxq;
3486 struct list_head *element;
3487 struct iwl4965_rx_mem_buffer *rxb;
3488 unsigned long flags;
3489 spin_lock_irqsave(&rxq->lock, flags);
3490 while (!list_empty(&rxq->rx_used)) {
3491 element = rxq->rx_used.next;
3492 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3493
3494 /* Alloc a new receive buffer */
3495 rxb->skb =
3496 alloc_skb(priv->hw_params.rx_buf_size,
3497 __GFP_NOWARN | GFP_ATOMIC);
3498 if (!rxb->skb) {
3499 if (net_ratelimit())
3500 printk(KERN_CRIT DRV_NAME
3501 ": Can not allocate SKB buffers\n");
3502 /* We don't reschedule replenish work here -- we will
3503 * call the restock method and if it still needs
3504 * more buffers it will schedule replenish */
3505 break;
3506 }
3507 priv->alloc_rxb_skb++;
3508 list_del(element);
3509
3510 /* Get physical address of RB/SKB */
3511 rxb->dma_addr =
3512 pci_map_single(priv->pci_dev, rxb->skb->data,
3513 priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3514 list_add_tail(&rxb->list, &rxq->rx_free);
3515 rxq->free_count++;
3516 }
3517 spin_unlock_irqrestore(&rxq->lock, flags);
3518 }
3519
3520 /*
3521 * this should be called while priv->lock is locked
3522 */
3523 static void __iwl4965_rx_replenish(void *data)
3524 {
3525 struct iwl_priv *priv = data;
3526
3527 iwl4965_rx_allocate(priv);
3528 iwl4965_rx_queue_restock(priv);
3529 }
3530
3531
3532 void iwl4965_rx_replenish(void *data)
3533 {
3534 struct iwl_priv *priv = data;
3535 unsigned long flags;
3536
3537 iwl4965_rx_allocate(priv);
3538
3539 spin_lock_irqsave(&priv->lock, flags);
3540 iwl4965_rx_queue_restock(priv);
3541 spin_unlock_irqrestore(&priv->lock, flags);
3542 }
3543
3544 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3545 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3546 * This free routine walks the list of POOL entries and if SKB is set to
3547 * non NULL it is unmapped and freed
3548 */
3549 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3550 {
3551 int i;
3552 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3553 if (rxq->pool[i].skb != NULL) {
3554 pci_unmap_single(priv->pci_dev,
3555 rxq->pool[i].dma_addr,
3556 priv->hw_params.rx_buf_size,
3557 PCI_DMA_FROMDEVICE);
3558 dev_kfree_skb(rxq->pool[i].skb);
3559 }
3560 }
3561
3562 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3563 rxq->dma_addr);
3564 rxq->bd = NULL;
3565 }
3566
3567 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3568 {
3569 struct iwl4965_rx_queue *rxq = &priv->rxq;
3570 struct pci_dev *dev = priv->pci_dev;
3571 int i;
3572
3573 spin_lock_init(&rxq->lock);
3574 INIT_LIST_HEAD(&rxq->rx_free);
3575 INIT_LIST_HEAD(&rxq->rx_used);
3576
3577 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3578 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3579 if (!rxq->bd)
3580 return -ENOMEM;
3581
3582 /* Fill the rx_used queue with _all_ of the Rx buffers */
3583 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3584 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3585
3586 /* Set us so that we have processed and used all buffers, but have
3587 * not restocked the Rx queue with fresh buffers */
3588 rxq->read = rxq->write = 0;
3589 rxq->free_count = 0;
3590 rxq->need_update = 0;
3591 return 0;
3592 }
3593
3594 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3595 {
3596 unsigned long flags;
3597 int i;
3598 spin_lock_irqsave(&rxq->lock, flags);
3599 INIT_LIST_HEAD(&rxq->rx_free);
3600 INIT_LIST_HEAD(&rxq->rx_used);
3601 /* Fill the rx_used queue with _all_ of the Rx buffers */
3602 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3603 /* In the reset function, these buffers may have been allocated
3604 * to an SKB, so we need to unmap and free potential storage */
3605 if (rxq->pool[i].skb != NULL) {
3606 pci_unmap_single(priv->pci_dev,
3607 rxq->pool[i].dma_addr,
3608 priv->hw_params.rx_buf_size,
3609 PCI_DMA_FROMDEVICE);
3610 priv->alloc_rxb_skb--;
3611 dev_kfree_skb(rxq->pool[i].skb);
3612 rxq->pool[i].skb = NULL;
3613 }
3614 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3615 }
3616
3617 /* Set us so that we have processed and used all buffers, but have
3618 * not restocked the Rx queue with fresh buffers */
3619 rxq->read = rxq->write = 0;
3620 rxq->free_count = 0;
3621 spin_unlock_irqrestore(&rxq->lock, flags);
3622 }
3623
3624 /* Convert linear signal-to-noise ratio into dB */
3625 static u8 ratio2dB[100] = {
3626 /* 0 1 2 3 4 5 6 7 8 9 */
3627 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3628 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3629 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3630 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3631 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3632 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3633 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3634 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3635 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3636 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
3637 };
3638
3639 /* Calculates a relative dB value from a ratio of linear
3640 * (i.e. not dB) signal levels.
3641 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3642 int iwl4965_calc_db_from_ratio(int sig_ratio)
3643 {
3644 /* 1000:1 or higher just report as 60 dB */
3645 if (sig_ratio >= 1000)
3646 return 60;
3647
3648 /* 100:1 or higher, divide by 10 and use table,
3649 * add 20 dB to make up for divide by 10 */
3650 if (sig_ratio >= 100)
3651 return (20 + (int)ratio2dB[sig_ratio/10]);
3652
3653 /* We shouldn't see this */
3654 if (sig_ratio < 1)
3655 return 0;
3656
3657 /* Use table for ratios 1:1 - 99:1 */
3658 return (int)ratio2dB[sig_ratio];
3659 }
3660
3661 #define PERFECT_RSSI (-20) /* dBm */
3662 #define WORST_RSSI (-95) /* dBm */
3663 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3664
3665 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3666 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3667 * about formulas used below. */
3668 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3669 {
3670 int sig_qual;
3671 int degradation = PERFECT_RSSI - rssi_dbm;
3672
3673 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3674 * as indicator; formula is (signal dbm - noise dbm).
3675 * SNR at or above 40 is a great signal (100%).
3676 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3677 * Weakest usable signal is usually 10 - 15 dB SNR. */
3678 if (noise_dbm) {
3679 if (rssi_dbm - noise_dbm >= 40)
3680 return 100;
3681 else if (rssi_dbm < noise_dbm)
3682 return 0;
3683 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3684
3685 /* Else use just the signal level.
3686 * This formula is a least squares fit of data points collected and
3687 * compared with a reference system that had a percentage (%) display
3688 * for signal quality. */
3689 } else
3690 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3691 (15 * RSSI_RANGE + 62 * degradation)) /
3692 (RSSI_RANGE * RSSI_RANGE);
3693
3694 if (sig_qual > 100)
3695 sig_qual = 100;
3696 else if (sig_qual < 1)
3697 sig_qual = 0;
3698
3699 return sig_qual;
3700 }
3701
3702 /**
3703 * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3704 *
3705 * Uses the priv->rx_handlers callback function array to invoke
3706 * the appropriate handlers, including command responses,
3707 * frame-received notifications, and other notifications.
3708 */
3709 static void iwl4965_rx_handle(struct iwl_priv *priv)
3710 {
3711 struct iwl4965_rx_mem_buffer *rxb;
3712 struct iwl4965_rx_packet *pkt;
3713 struct iwl4965_rx_queue *rxq = &priv->rxq;
3714 u32 r, i;
3715 int reclaim;
3716 unsigned long flags;
3717 u8 fill_rx = 0;
3718 u32 count = 8;
3719
3720 /* uCode's read index (stored in shared DRAM) indicates the last Rx
3721 * buffer that the driver may process (last buffer filled by ucode). */
3722 r = iwl4965_hw_get_rx_read(priv);
3723 i = rxq->read;
3724
3725 /* Rx interrupt, but nothing sent from uCode */
3726 if (i == r)
3727 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3728
3729 if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3730 fill_rx = 1;
3731
3732 while (i != r) {
3733 rxb = rxq->queue[i];
3734
3735 /* If an RXB doesn't have a Rx queue slot associated with it,
3736 * then a bug has been introduced in the queue refilling
3737 * routines -- catch it here */
3738 BUG_ON(rxb == NULL);
3739
3740 rxq->queue[i] = NULL;
3741
3742 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3743 priv->hw_params.rx_buf_size,
3744 PCI_DMA_FROMDEVICE);
3745 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3746
3747 /* Reclaim a command buffer only if this packet is a response
3748 * to a (driver-originated) command.
3749 * If the packet (e.g. Rx frame) originated from uCode,
3750 * there is no command buffer to reclaim.
3751 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3752 * but apparently a few don't get set; catch them here. */
3753 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3754 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3755 (pkt->hdr.cmd != REPLY_RX) &&
3756 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3757 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3758 (pkt->hdr.cmd != REPLY_TX);
3759
3760 /* Based on type of command response or notification,
3761 * handle those that need handling via function in
3762 * rx_handlers table. See iwl4965_setup_rx_handlers() */
3763 if (priv->rx_handlers[pkt->hdr.cmd]) {
3764 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3765 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3766 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3767 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3768 } else {
3769 /* No handling needed */
3770 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3771 "r %d i %d No handler needed for %s, 0x%02x\n",
3772 r, i, get_cmd_string(pkt->hdr.cmd),
3773 pkt->hdr.cmd);
3774 }
3775
3776 if (reclaim) {
3777 /* Invoke any callbacks, transfer the skb to caller, and
3778 * fire off the (possibly) blocking iwl_send_cmd()
3779 * as we reclaim the driver command queue */
3780 if (rxb && rxb->skb)
3781 iwl4965_tx_cmd_complete(priv, rxb);
3782 else
3783 IWL_WARNING("Claim null rxb?\n");
3784 }
3785
3786 /* For now we just don't re-use anything. We can tweak this
3787 * later to try and re-use notification packets and SKBs that
3788 * fail to Rx correctly */
3789 if (rxb->skb != NULL) {
3790 priv->alloc_rxb_skb--;
3791 dev_kfree_skb_any(rxb->skb);
3792 rxb->skb = NULL;
3793 }
3794
3795 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3796 priv->hw_params.rx_buf_size,
3797 PCI_DMA_FROMDEVICE);
3798 spin_lock_irqsave(&rxq->lock, flags);
3799 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3800 spin_unlock_irqrestore(&rxq->lock, flags);
3801 i = (i + 1) & RX_QUEUE_MASK;
3802 /* If there are a lot of unused frames,
3803 * restock the Rx queue so ucode wont assert. */
3804 if (fill_rx) {
3805 count++;
3806 if (count >= 8) {
3807 priv->rxq.read = i;
3808 __iwl4965_rx_replenish(priv);
3809 count = 0;
3810 }
3811 }
3812 }
3813
3814 /* Backtrack one entry */
3815 priv->rxq.read = i;
3816 iwl4965_rx_queue_restock(priv);
3817 }
3818
3819 /**
3820 * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3821 */
3822 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3823 struct iwl4965_tx_queue *txq)
3824 {
3825 u32 reg = 0;
3826 int rc = 0;
3827 int txq_id = txq->q.id;
3828
3829 if (txq->need_update == 0)
3830 return rc;
3831
3832 /* if we're trying to save power */
3833 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3834 /* wake up nic if it's powered down ...
3835 * uCode will wake up, and interrupt us again, so next
3836 * time we'll skip this part. */
3837 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3838
3839 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3840 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3841 iwl_set_bit(priv, CSR_GP_CNTRL,
3842 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3843 return rc;
3844 }
3845
3846 /* restore this queue's parameters in nic hardware. */
3847 rc = iwl_grab_nic_access(priv);
3848 if (rc)
3849 return rc;
3850 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3851 txq->q.write_ptr | (txq_id << 8));
3852 iwl_release_nic_access(priv);
3853
3854 /* else not in power-save mode, uCode will never sleep when we're
3855 * trying to tx (during RFKILL, we're not trying to tx). */
3856 } else
3857 iwl_write32(priv, HBUS_TARG_WRPTR,
3858 txq->q.write_ptr | (txq_id << 8));
3859
3860 txq->need_update = 0;
3861
3862 return rc;
3863 }
3864
3865 #ifdef CONFIG_IWLWIFI_DEBUG
3866 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3867 {
3868 DECLARE_MAC_BUF(mac);
3869
3870 IWL_DEBUG_RADIO("RX CONFIG:\n");
3871 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3872 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3873 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3874 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3875 le32_to_cpu(rxon->filter_flags));
3876 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3877 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3878 rxon->ofdm_basic_rates);
3879 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3880 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3881 print_mac(mac, rxon->node_addr));
3882 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3883 print_mac(mac, rxon->bssid_addr));
3884 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3885 }
3886 #endif
3887
3888 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3889 {
3890 IWL_DEBUG_ISR("Enabling interrupts\n");
3891 set_bit(STATUS_INT_ENABLED, &priv->status);
3892 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3893 }
3894
3895 /* call this function to flush any scheduled tasklet */
3896 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3897 {
3898 /* wait to make sure we flush pedding tasklet*/
3899 synchronize_irq(priv->pci_dev->irq);
3900 tasklet_kill(&priv->irq_tasklet);
3901 }
3902
3903 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3904 {
3905 clear_bit(STATUS_INT_ENABLED, &priv->status);
3906
3907 /* disable interrupts from uCode/NIC to host */
3908 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3909
3910 /* acknowledge/clear/reset any interrupts still pending
3911 * from uCode or flow handler (Rx/Tx DMA) */
3912 iwl_write32(priv, CSR_INT, 0xffffffff);
3913 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3914 IWL_DEBUG_ISR("Disabled interrupts\n");
3915 }
3916
3917 static const char *desc_lookup(int i)
3918 {
3919 switch (i) {
3920 case 1:
3921 return "FAIL";
3922 case 2:
3923 return "BAD_PARAM";
3924 case 3:
3925 return "BAD_CHECKSUM";
3926 case 4:
3927 return "NMI_INTERRUPT";
3928 case 5:
3929 return "SYSASSERT";
3930 case 6:
3931 return "FATAL_ERROR";
3932 }
3933
3934 return "UNKNOWN";
3935 }
3936
3937 #define ERROR_START_OFFSET (1 * sizeof(u32))
3938 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
3939
3940 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3941 {
3942 u32 data2, line;
3943 u32 desc, time, count, base, data1;
3944 u32 blink1, blink2, ilink1, ilink2;
3945 int rc;
3946
3947 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3948
3949 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3950 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3951 return;
3952 }
3953
3954 rc = iwl_grab_nic_access(priv);
3955 if (rc) {
3956 IWL_WARNING("Can not read from adapter at this time.\n");
3957 return;
3958 }
3959
3960 count = iwl_read_targ_mem(priv, base);
3961
3962 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3963 IWL_ERROR("Start IWL Error Log Dump:\n");
3964 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3965 }
3966
3967 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3968 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3969 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3970 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3971 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3972 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3973 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3974 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3975 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3976
3977 IWL_ERROR("Desc Time "
3978 "data1 data2 line\n");
3979 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3980 desc_lookup(desc), desc, time, data1, data2, line);
3981 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
3982 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3983 ilink1, ilink2);
3984
3985 iwl_release_nic_access(priv);
3986 }
3987
3988 #define EVENT_START_OFFSET (4 * sizeof(u32))
3989
3990 /**
3991 * iwl4965_print_event_log - Dump error event log to syslog
3992 *
3993 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3994 */
3995 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
3996 u32 num_events, u32 mode)
3997 {
3998 u32 i;
3999 u32 base; /* SRAM byte address of event log header */
4000 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4001 u32 ptr; /* SRAM byte address of log data */
4002 u32 ev, time, data; /* event log data */
4003
4004 if (num_events == 0)
4005 return;
4006
4007 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4008
4009 if (mode == 0)
4010 event_size = 2 * sizeof(u32);
4011 else
4012 event_size = 3 * sizeof(u32);
4013
4014 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4015
4016 /* "time" is actually "data" for mode 0 (no timestamp).
4017 * place event id # at far right for easier visual parsing. */
4018 for (i = 0; i < num_events; i++) {
4019 ev = iwl_read_targ_mem(priv, ptr);
4020 ptr += sizeof(u32);
4021 time = iwl_read_targ_mem(priv, ptr);
4022 ptr += sizeof(u32);
4023 if (mode == 0)
4024 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4025 else {
4026 data = iwl_read_targ_mem(priv, ptr);
4027 ptr += sizeof(u32);
4028 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4029 }
4030 }
4031 }
4032
4033 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4034 {
4035 int rc;
4036 u32 base; /* SRAM byte address of event log header */
4037 u32 capacity; /* event log capacity in # entries */
4038 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4039 u32 num_wraps; /* # times uCode wrapped to top of log */
4040 u32 next_entry; /* index of next entry to be written by uCode */
4041 u32 size; /* # entries that we'll print */
4042
4043 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4044 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4045 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4046 return;
4047 }
4048
4049 rc = iwl_grab_nic_access(priv);
4050 if (rc) {
4051 IWL_WARNING("Can not read from adapter at this time.\n");
4052 return;
4053 }
4054
4055 /* event log header */
4056 capacity = iwl_read_targ_mem(priv, base);
4057 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4058 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4059 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4060
4061 size = num_wraps ? capacity : next_entry;
4062
4063 /* bail out if nothing in log */
4064 if (size == 0) {
4065 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4066 iwl_release_nic_access(priv);
4067 return;
4068 }
4069
4070 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4071 size, num_wraps);
4072
4073 /* if uCode has wrapped back to top of log, start at the oldest entry,
4074 * i.e the next one that uCode would fill. */
4075 if (num_wraps)
4076 iwl4965_print_event_log(priv, next_entry,
4077 capacity - next_entry, mode);
4078
4079 /* (then/else) start at top of log */
4080 iwl4965_print_event_log(priv, 0, next_entry, mode);
4081
4082 iwl_release_nic_access(priv);
4083 }
4084
4085 /**
4086 * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4087 */
4088 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4089 {
4090 /* Set the FW error flag -- cleared on iwl4965_down */
4091 set_bit(STATUS_FW_ERROR, &priv->status);
4092
4093 /* Cancel currently queued command. */
4094 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4095
4096 #ifdef CONFIG_IWLWIFI_DEBUG
4097 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4098 iwl4965_dump_nic_error_log(priv);
4099 iwl4965_dump_nic_event_log(priv);
4100 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4101 }
4102 #endif
4103
4104 wake_up_interruptible(&priv->wait_command_queue);
4105
4106 /* Keep the restart process from trying to send host
4107 * commands by clearing the INIT status bit */
4108 clear_bit(STATUS_READY, &priv->status);
4109
4110 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4111 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4112 "Restarting adapter due to uCode error.\n");
4113
4114 if (iwl_is_associated(priv)) {
4115 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4116 sizeof(priv->recovery_rxon));
4117 priv->error_recovering = 1;
4118 }
4119 queue_work(priv->workqueue, &priv->restart);
4120 }
4121 }
4122
4123 static void iwl4965_error_recovery(struct iwl_priv *priv)
4124 {
4125 unsigned long flags;
4126
4127 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4128 sizeof(priv->staging_rxon));
4129 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4130 iwl4965_commit_rxon(priv);
4131
4132 iwl4965_rxon_add_station(priv, priv->bssid, 1);
4133
4134 spin_lock_irqsave(&priv->lock, flags);
4135 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4136 priv->error_recovering = 0;
4137 spin_unlock_irqrestore(&priv->lock, flags);
4138 }
4139
4140 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4141 {
4142 u32 inta, handled = 0;
4143 u32 inta_fh;
4144 unsigned long flags;
4145 #ifdef CONFIG_IWLWIFI_DEBUG
4146 u32 inta_mask;
4147 #endif
4148
4149 spin_lock_irqsave(&priv->lock, flags);
4150
4151 /* Ack/clear/reset pending uCode interrupts.
4152 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4153 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4154 inta = iwl_read32(priv, CSR_INT);
4155 iwl_write32(priv, CSR_INT, inta);
4156
4157 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4158 * Any new interrupts that happen after this, either while we're
4159 * in this tasklet, or later, will show up in next ISR/tasklet. */
4160 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4161 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4162
4163 #ifdef CONFIG_IWLWIFI_DEBUG
4164 if (iwl_debug_level & IWL_DL_ISR) {
4165 /* just for debug */
4166 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4167 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4168 inta, inta_mask, inta_fh);
4169 }
4170 #endif
4171
4172 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4173 * atomic, make sure that inta covers all the interrupts that
4174 * we've discovered, even if FH interrupt came in just after
4175 * reading CSR_INT. */
4176 if (inta_fh & CSR49_FH_INT_RX_MASK)
4177 inta |= CSR_INT_BIT_FH_RX;
4178 if (inta_fh & CSR49_FH_INT_TX_MASK)
4179 inta |= CSR_INT_BIT_FH_TX;
4180
4181 /* Now service all interrupt bits discovered above. */
4182 if (inta & CSR_INT_BIT_HW_ERR) {
4183 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4184
4185 /* Tell the device to stop sending interrupts */
4186 iwl4965_disable_interrupts(priv);
4187
4188 iwl4965_irq_handle_error(priv);
4189
4190 handled |= CSR_INT_BIT_HW_ERR;
4191
4192 spin_unlock_irqrestore(&priv->lock, flags);
4193
4194 return;
4195 }
4196
4197 #ifdef CONFIG_IWLWIFI_DEBUG
4198 if (iwl_debug_level & (IWL_DL_ISR)) {
4199 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4200 if (inta & CSR_INT_BIT_SCD)
4201 IWL_DEBUG_ISR("Scheduler finished to transmit "
4202 "the frame/frames.\n");
4203
4204 /* Alive notification via Rx interrupt will do the real work */
4205 if (inta & CSR_INT_BIT_ALIVE)
4206 IWL_DEBUG_ISR("Alive interrupt\n");
4207 }
4208 #endif
4209 /* Safely ignore these bits for debug checks below */
4210 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4211
4212 /* HW RF KILL switch toggled */
4213 if (inta & CSR_INT_BIT_RF_KILL) {
4214 int hw_rf_kill = 0;
4215 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4216 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4217 hw_rf_kill = 1;
4218
4219 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4220 "RF_KILL bit toggled to %s.\n",
4221 hw_rf_kill ? "disable radio":"enable radio");
4222
4223 /* Queue restart only if RF_KILL switch was set to "kill"
4224 * when we loaded driver, and is now set to "enable".
4225 * After we're Alive, RF_KILL gets handled by
4226 * iwl4965_rx_card_state_notif() */
4227 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4228 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4229 queue_work(priv->workqueue, &priv->restart);
4230 }
4231
4232 handled |= CSR_INT_BIT_RF_KILL;
4233 }
4234
4235 /* Chip got too hot and stopped itself */
4236 if (inta & CSR_INT_BIT_CT_KILL) {
4237 IWL_ERROR("Microcode CT kill error detected.\n");
4238 handled |= CSR_INT_BIT_CT_KILL;
4239 }
4240
4241 /* Error detected by uCode */
4242 if (inta & CSR_INT_BIT_SW_ERR) {
4243 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4244 inta);
4245 iwl4965_irq_handle_error(priv);
4246 handled |= CSR_INT_BIT_SW_ERR;
4247 }
4248
4249 /* uCode wakes up after power-down sleep */
4250 if (inta & CSR_INT_BIT_WAKEUP) {
4251 IWL_DEBUG_ISR("Wakeup interrupt\n");
4252 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4253 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4254 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4255 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4256 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4257 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4258 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4259
4260 handled |= CSR_INT_BIT_WAKEUP;
4261 }
4262
4263 /* All uCode command responses, including Tx command responses,
4264 * Rx "responses" (frame-received notification), and other
4265 * notifications from uCode come through here*/
4266 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4267 iwl4965_rx_handle(priv);
4268 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4269 }
4270
4271 if (inta & CSR_INT_BIT_FH_TX) {
4272 IWL_DEBUG_ISR("Tx interrupt\n");
4273 handled |= CSR_INT_BIT_FH_TX;
4274 }
4275
4276 if (inta & ~handled)
4277 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4278
4279 if (inta & ~CSR_INI_SET_MASK) {
4280 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4281 inta & ~CSR_INI_SET_MASK);
4282 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4283 }
4284
4285 /* Re-enable all interrupts */
4286 /* only Re-enable if diabled by irq */
4287 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4288 iwl4965_enable_interrupts(priv);
4289
4290 #ifdef CONFIG_IWLWIFI_DEBUG
4291 if (iwl_debug_level & (IWL_DL_ISR)) {
4292 inta = iwl_read32(priv, CSR_INT);
4293 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4294 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4295 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4296 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4297 }
4298 #endif
4299 spin_unlock_irqrestore(&priv->lock, flags);
4300 }
4301
4302 static irqreturn_t iwl4965_isr(int irq, void *data)
4303 {
4304 struct iwl_priv *priv = data;
4305 u32 inta, inta_mask;
4306 u32 inta_fh;
4307 if (!priv)
4308 return IRQ_NONE;
4309
4310 spin_lock(&priv->lock);
4311
4312 /* Disable (but don't clear!) interrupts here to avoid
4313 * back-to-back ISRs and sporadic interrupts from our NIC.
4314 * If we have something to service, the tasklet will re-enable ints.
4315 * If we *don't* have something, we'll re-enable before leaving here. */
4316 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4317 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4318
4319 /* Discover which interrupts are active/pending */
4320 inta = iwl_read32(priv, CSR_INT);
4321 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4322
4323 /* Ignore interrupt if there's nothing in NIC to service.
4324 * This may be due to IRQ shared with another device,
4325 * or due to sporadic interrupts thrown from our NIC. */
4326 if (!inta && !inta_fh) {
4327 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4328 goto none;
4329 }
4330
4331 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4332 /* Hardware disappeared. It might have already raised
4333 * an interrupt */
4334 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4335 goto unplugged;
4336 }
4337
4338 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4339 inta, inta_mask, inta_fh);
4340
4341 inta &= ~CSR_INT_BIT_SCD;
4342
4343 /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4344 if (likely(inta || inta_fh))
4345 tasklet_schedule(&priv->irq_tasklet);
4346
4347 unplugged:
4348 spin_unlock(&priv->lock);
4349 return IRQ_HANDLED;
4350
4351 none:
4352 /* re-enable interrupts here since we don't have anything to service. */
4353 /* only Re-enable if diabled by irq */
4354 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4355 iwl4965_enable_interrupts(priv);
4356 spin_unlock(&priv->lock);
4357 return IRQ_NONE;
4358 }
4359
4360 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4361 * sending probe req. This should be set long enough to hear probe responses
4362 * from more than one AP. */
4363 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
4364 #define IWL_ACTIVE_DWELL_TIME_52 (10)
4365
4366 /* For faster active scanning, scan will move to the next channel if fewer than
4367 * PLCP_QUIET_THRESH packets are heard on this channel within
4368 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
4369 * time if it's a quiet channel (nothing responded to our probe, and there's
4370 * no other traffic).
4371 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4372 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
4373 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
4374
4375 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4376 * Must be set longer than active dwell time.
4377 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4378 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
4379 #define IWL_PASSIVE_DWELL_TIME_52 (10)
4380 #define IWL_PASSIVE_DWELL_BASE (100)
4381 #define IWL_CHANNEL_TUNE_TIME 5
4382
4383 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4384 enum ieee80211_band band)
4385 {
4386 if (band == IEEE80211_BAND_5GHZ)
4387 return IWL_ACTIVE_DWELL_TIME_52;
4388 else
4389 return IWL_ACTIVE_DWELL_TIME_24;
4390 }
4391
4392 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4393 enum ieee80211_band band)
4394 {
4395 u16 active = iwl4965_get_active_dwell_time(priv, band);
4396 u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4397 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4398 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4399
4400 if (iwl_is_associated(priv)) {
4401 /* If we're associated, we clamp the maximum passive
4402 * dwell time to be 98% of the beacon interval (minus
4403 * 2 * channel tune time) */
4404 passive = priv->beacon_int;
4405 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4406 passive = IWL_PASSIVE_DWELL_BASE;
4407 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4408 }
4409
4410 if (passive <= active)
4411 passive = active + 1;
4412
4413 return passive;
4414 }
4415
4416 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4417 enum ieee80211_band band,
4418 u8 is_active, u8 direct_mask,
4419 struct iwl4965_scan_channel *scan_ch)
4420 {
4421 const struct ieee80211_channel *channels = NULL;
4422 const struct ieee80211_supported_band *sband;
4423 const struct iwl_channel_info *ch_info;
4424 u16 passive_dwell = 0;
4425 u16 active_dwell = 0;
4426 int added, i;
4427
4428 sband = iwl_get_hw_mode(priv, band);
4429 if (!sband)
4430 return 0;
4431
4432 channels = sband->channels;
4433
4434 active_dwell = iwl4965_get_active_dwell_time(priv, band);
4435 passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4436
4437 for (i = 0, added = 0; i < sband->n_channels; i++) {
4438 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4439 continue;
4440
4441 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4442
4443 ch_info = iwl_get_channel_info(priv, band,
4444 scan_ch->channel);
4445 if (!is_channel_valid(ch_info)) {
4446 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4447 scan_ch->channel);
4448 continue;
4449 }
4450
4451 if (!is_active || is_channel_passive(ch_info) ||
4452 (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4453 scan_ch->type = 0; /* passive */
4454 else
4455 scan_ch->type = 1; /* active */
4456
4457 if (scan_ch->type & 1)
4458 scan_ch->type |= (direct_mask << 1);
4459
4460 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4461 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4462
4463 /* Set txpower levels to defaults */
4464 scan_ch->tpc.dsp_atten = 110;
4465 /* scan_pwr_info->tpc.dsp_atten; */
4466
4467 /*scan_pwr_info->tpc.tx_gain; */
4468 if (band == IEEE80211_BAND_5GHZ)
4469 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4470 else {
4471 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4472 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4473 * power level:
4474 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4475 */
4476 }
4477
4478 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4479 scan_ch->channel,
4480 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4481 (scan_ch->type & 1) ?
4482 active_dwell : passive_dwell);
4483
4484 scan_ch++;
4485 added++;
4486 }
4487
4488 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4489 return added;
4490 }
4491
4492 /******************************************************************************
4493 *
4494 * uCode download functions
4495 *
4496 ******************************************************************************/
4497
4498 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4499 {
4500 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4501 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4502 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4503 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4504 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4505 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4506 }
4507
4508 static void iwl4965_nic_start(struct iwl_priv *priv)
4509 {
4510 /* Remove all resets to allow NIC to operate */
4511 iwl_write32(priv, CSR_RESET, 0);
4512 }
4513
4514
4515 /**
4516 * iwl4965_read_ucode - Read uCode images from disk file.
4517 *
4518 * Copy into buffers for card to fetch via bus-mastering
4519 */
4520 static int iwl4965_read_ucode(struct iwl_priv *priv)
4521 {
4522 struct iwl4965_ucode *ucode;
4523 int ret;
4524 const struct firmware *ucode_raw;
4525 const char *name = priv->cfg->fw_name;
4526 u8 *src;
4527 size_t len;
4528 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4529
4530 /* Ask kernel firmware_class module to get the boot firmware off disk.
4531 * request_firmware() is synchronous, file is in memory on return. */
4532 ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4533 if (ret < 0) {
4534 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4535 name, ret);
4536 goto error;
4537 }
4538
4539 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4540 name, ucode_raw->size);
4541
4542 /* Make sure that we got at least our header! */
4543 if (ucode_raw->size < sizeof(*ucode)) {
4544 IWL_ERROR("File size way too small!\n");
4545 ret = -EINVAL;
4546 goto err_release;
4547 }
4548
4549 /* Data from ucode file: header followed by uCode images */
4550 ucode = (void *)ucode_raw->data;
4551
4552 ver = le32_to_cpu(ucode->ver);
4553 inst_size = le32_to_cpu(ucode->inst_size);
4554 data_size = le32_to_cpu(ucode->data_size);
4555 init_size = le32_to_cpu(ucode->init_size);
4556 init_data_size = le32_to_cpu(ucode->init_data_size);
4557 boot_size = le32_to_cpu(ucode->boot_size);
4558
4559 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4560 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4561 inst_size);
4562 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4563 data_size);
4564 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4565 init_size);
4566 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4567 init_data_size);
4568 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4569 boot_size);
4570
4571 /* Verify size of file vs. image size info in file's header */
4572 if (ucode_raw->size < sizeof(*ucode) +
4573 inst_size + data_size + init_size +
4574 init_data_size + boot_size) {
4575
4576 IWL_DEBUG_INFO("uCode file size %d too small\n",
4577 (int)ucode_raw->size);
4578 ret = -EINVAL;
4579 goto err_release;
4580 }
4581
4582 /* Verify that uCode images will fit in card's SRAM */
4583 if (inst_size > priv->hw_params.max_inst_size) {
4584 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4585 inst_size);
4586 ret = -EINVAL;
4587 goto err_release;
4588 }
4589
4590 if (data_size > priv->hw_params.max_data_size) {
4591 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4592 data_size);
4593 ret = -EINVAL;
4594 goto err_release;
4595 }
4596 if (init_size > priv->hw_params.max_inst_size) {
4597 IWL_DEBUG_INFO
4598 ("uCode init instr len %d too large to fit in\n",
4599 init_size);
4600 ret = -EINVAL;
4601 goto err_release;
4602 }
4603 if (init_data_size > priv->hw_params.max_data_size) {
4604 IWL_DEBUG_INFO
4605 ("uCode init data len %d too large to fit in\n",
4606 init_data_size);
4607 ret = -EINVAL;
4608 goto err_release;
4609 }
4610 if (boot_size > priv->hw_params.max_bsm_size) {
4611 IWL_DEBUG_INFO
4612 ("uCode boot instr len %d too large to fit in\n",
4613 boot_size);
4614 ret = -EINVAL;
4615 goto err_release;
4616 }
4617
4618 /* Allocate ucode buffers for card's bus-master loading ... */
4619
4620 /* Runtime instructions and 2 copies of data:
4621 * 1) unmodified from disk
4622 * 2) backup cache for save/restore during power-downs */
4623 priv->ucode_code.len = inst_size;
4624 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4625
4626 priv->ucode_data.len = data_size;
4627 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4628
4629 priv->ucode_data_backup.len = data_size;
4630 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4631
4632 /* Initialization instructions and data */
4633 if (init_size && init_data_size) {
4634 priv->ucode_init.len = init_size;
4635 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4636
4637 priv->ucode_init_data.len = init_data_size;
4638 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4639
4640 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4641 goto err_pci_alloc;
4642 }
4643
4644 /* Bootstrap (instructions only, no data) */
4645 if (boot_size) {
4646 priv->ucode_boot.len = boot_size;
4647 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4648
4649 if (!priv->ucode_boot.v_addr)
4650 goto err_pci_alloc;
4651 }
4652
4653 /* Copy images into buffers for card's bus-master reads ... */
4654
4655 /* Runtime instructions (first block of data in file) */
4656 src = &ucode->data[0];
4657 len = priv->ucode_code.len;
4658 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4659 memcpy(priv->ucode_code.v_addr, src, len);
4660 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4661 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4662
4663 /* Runtime data (2nd block)
4664 * NOTE: Copy into backup buffer will be done in iwl4965_up() */
4665 src = &ucode->data[inst_size];
4666 len = priv->ucode_data.len;
4667 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4668 memcpy(priv->ucode_data.v_addr, src, len);
4669 memcpy(priv->ucode_data_backup.v_addr, src, len);
4670
4671 /* Initialization instructions (3rd block) */
4672 if (init_size) {
4673 src = &ucode->data[inst_size + data_size];
4674 len = priv->ucode_init.len;
4675 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4676 len);
4677 memcpy(priv->ucode_init.v_addr, src, len);
4678 }
4679
4680 /* Initialization data (4th block) */
4681 if (init_data_size) {
4682 src = &ucode->data[inst_size + data_size + init_size];
4683 len = priv->ucode_init_data.len;
4684 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4685 len);
4686 memcpy(priv->ucode_init_data.v_addr, src, len);
4687 }
4688
4689 /* Bootstrap instructions (5th block) */
4690 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4691 len = priv->ucode_boot.len;
4692 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4693 memcpy(priv->ucode_boot.v_addr, src, len);
4694
4695 /* We have our copies now, allow OS release its copies */
4696 release_firmware(ucode_raw);
4697 return 0;
4698
4699 err_pci_alloc:
4700 IWL_ERROR("failed to allocate pci memory\n");
4701 ret = -ENOMEM;
4702 iwl4965_dealloc_ucode_pci(priv);
4703
4704 err_release:
4705 release_firmware(ucode_raw);
4706
4707 error:
4708 return ret;
4709 }
4710
4711
4712 /**
4713 * iwl4965_set_ucode_ptrs - Set uCode address location
4714 *
4715 * Tell initialization uCode where to find runtime uCode.
4716 *
4717 * BSM registers initially contain pointers to initialization uCode.
4718 * We need to replace them to load runtime uCode inst and data,
4719 * and to save runtime data when powering down.
4720 */
4721 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4722 {
4723 dma_addr_t pinst;
4724 dma_addr_t pdata;
4725 int rc = 0;
4726 unsigned long flags;
4727
4728 /* bits 35:4 for 4965 */
4729 pinst = priv->ucode_code.p_addr >> 4;
4730 pdata = priv->ucode_data_backup.p_addr >> 4;
4731
4732 spin_lock_irqsave(&priv->lock, flags);
4733 rc = iwl_grab_nic_access(priv);
4734 if (rc) {
4735 spin_unlock_irqrestore(&priv->lock, flags);
4736 return rc;
4737 }
4738
4739 /* Tell bootstrap uCode where to find image to load */
4740 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4741 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4742 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4743 priv->ucode_data.len);
4744
4745 /* Inst bytecount must be last to set up, bit 31 signals uCode
4746 * that all new ptr/size info is in place */
4747 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4748 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4749
4750 iwl_release_nic_access(priv);
4751
4752 spin_unlock_irqrestore(&priv->lock, flags);
4753
4754 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4755
4756 return rc;
4757 }
4758
4759 /**
4760 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4761 *
4762 * Called after REPLY_ALIVE notification received from "initialize" uCode.
4763 *
4764 * The 4965 "initialize" ALIVE reply contains calibration data for:
4765 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
4766 * (3945 does not contain this data).
4767 *
4768 * Tell "initialize" uCode to go ahead and load the runtime uCode.
4769 */
4770 static void iwl4965_init_alive_start(struct iwl_priv *priv)
4771 {
4772 /* Check alive response for "valid" sign from uCode */
4773 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4774 /* We had an error bringing up the hardware, so take it
4775 * all the way back down so we can try again */
4776 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4777 goto restart;
4778 }
4779
4780 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4781 * This is a paranoid check, because we would not have gotten the
4782 * "initialize" alive if code weren't properly loaded. */
4783 if (iwl_verify_ucode(priv)) {
4784 /* Runtime instruction load was bad;
4785 * take it all the way back down so we can try again */
4786 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4787 goto restart;
4788 }
4789
4790 /* Calculate temperature */
4791 priv->temperature = iwl4965_get_temperature(priv);
4792
4793 /* Send pointers to protocol/runtime uCode image ... init code will
4794 * load and launch runtime uCode, which will send us another "Alive"
4795 * notification. */
4796 IWL_DEBUG_INFO("Initialization Alive received.\n");
4797 if (iwl4965_set_ucode_ptrs(priv)) {
4798 /* Runtime instruction load won't happen;
4799 * take it all the way back down so we can try again */
4800 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4801 goto restart;
4802 }
4803 return;
4804
4805 restart:
4806 queue_work(priv->workqueue, &priv->restart);
4807 }
4808
4809
4810 /**
4811 * iwl4965_alive_start - called after REPLY_ALIVE notification received
4812 * from protocol/runtime uCode (initialization uCode's
4813 * Alive gets handled by iwl4965_init_alive_start()).
4814 */
4815 static void iwl4965_alive_start(struct iwl_priv *priv)
4816 {
4817 int ret = 0;
4818
4819 IWL_DEBUG_INFO("Runtime Alive received.\n");
4820
4821 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4822 /* We had an error bringing up the hardware, so take it
4823 * all the way back down so we can try again */
4824 IWL_DEBUG_INFO("Alive failed.\n");
4825 goto restart;
4826 }
4827
4828 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4829 * This is a paranoid check, because we would not have gotten the
4830 * "runtime" alive if code weren't properly loaded. */
4831 if (iwl_verify_ucode(priv)) {
4832 /* Runtime instruction load was bad;
4833 * take it all the way back down so we can try again */
4834 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4835 goto restart;
4836 }
4837
4838 iwlcore_clear_stations_table(priv);
4839
4840 ret = priv->cfg->ops->lib->alive_notify(priv);
4841 if (ret) {
4842 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
4843 ret);
4844 goto restart;
4845 }
4846
4847 /* After the ALIVE response, we can send host commands to 4965 uCode */
4848 set_bit(STATUS_ALIVE, &priv->status);
4849
4850 /* Clear out the uCode error bit if it is set */
4851 clear_bit(STATUS_FW_ERROR, &priv->status);
4852
4853 if (iwl_is_rfkill(priv))
4854 return;
4855
4856 ieee80211_start_queues(priv->hw);
4857
4858 priv->active_rate = priv->rates_mask;
4859 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4860
4861 if (iwl_is_associated(priv)) {
4862 struct iwl4965_rxon_cmd *active_rxon =
4863 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
4864
4865 memcpy(&priv->staging_rxon, &priv->active_rxon,
4866 sizeof(priv->staging_rxon));
4867 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4868 } else {
4869 /* Initialize our rx_config data */
4870 iwl4965_connection_init_rx_config(priv);
4871 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4872 }
4873
4874 /* Configure Bluetooth device coexistence support */
4875 iwl4965_send_bt_config(priv);
4876
4877 /* Configure the adapter for unassociated operation */
4878 iwl4965_commit_rxon(priv);
4879
4880 /* At this point, the NIC is initialized and operational */
4881 priv->notif_missed_beacons = 0;
4882
4883 iwl4965_rf_kill_ct_config(priv);
4884
4885 iwl_leds_register(priv);
4886
4887 IWL_DEBUG_INFO("ALIVE processing complete.\n");
4888 set_bit(STATUS_READY, &priv->status);
4889 wake_up_interruptible(&priv->wait_command_queue);
4890
4891 if (priv->error_recovering)
4892 iwl4965_error_recovery(priv);
4893
4894 iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
4895 ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
4896 return;
4897
4898 restart:
4899 queue_work(priv->workqueue, &priv->restart);
4900 }
4901
4902 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
4903
4904 static void __iwl4965_down(struct iwl_priv *priv)
4905 {
4906 unsigned long flags;
4907 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4908 struct ieee80211_conf *conf = NULL;
4909
4910 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4911
4912 conf = ieee80211_get_hw_conf(priv->hw);
4913
4914 if (!exit_pending)
4915 set_bit(STATUS_EXIT_PENDING, &priv->status);
4916
4917 iwl_leds_unregister(priv);
4918
4919 iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
4920
4921 iwlcore_clear_stations_table(priv);
4922
4923 /* Unblock any waiting calls */
4924 wake_up_interruptible_all(&priv->wait_command_queue);
4925
4926 /* Wipe out the EXIT_PENDING status bit if we are not actually
4927 * exiting the module */
4928 if (!exit_pending)
4929 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4930
4931 /* stop and reset the on-board processor */
4932 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4933
4934 /* tell the device to stop sending interrupts */
4935 spin_lock_irqsave(&priv->lock, flags);
4936 iwl4965_disable_interrupts(priv);
4937 spin_unlock_irqrestore(&priv->lock, flags);
4938 iwl_synchronize_irq(priv);
4939
4940 if (priv->mac80211_registered)
4941 ieee80211_stop_queues(priv->hw);
4942
4943 /* If we have not previously called iwl4965_init() then
4944 * clear all bits but the RF Kill and SUSPEND bits and return */
4945 if (!iwl_is_init(priv)) {
4946 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4947 STATUS_RF_KILL_HW |
4948 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4949 STATUS_RF_KILL_SW |
4950 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4951 STATUS_GEO_CONFIGURED |
4952 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4953 STATUS_IN_SUSPEND;
4954 goto exit;
4955 }
4956
4957 /* ...otherwise clear out all the status bits but the RF Kill and
4958 * SUSPEND bits and continue taking the NIC down. */
4959 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4960 STATUS_RF_KILL_HW |
4961 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4962 STATUS_RF_KILL_SW |
4963 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4964 STATUS_GEO_CONFIGURED |
4965 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4966 STATUS_IN_SUSPEND |
4967 test_bit(STATUS_FW_ERROR, &priv->status) <<
4968 STATUS_FW_ERROR;
4969
4970 spin_lock_irqsave(&priv->lock, flags);
4971 iwl_clear_bit(priv, CSR_GP_CNTRL,
4972 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4973 spin_unlock_irqrestore(&priv->lock, flags);
4974
4975 iwl4965_hw_txq_ctx_stop(priv);
4976 iwl4965_hw_rxq_stop(priv);
4977
4978 spin_lock_irqsave(&priv->lock, flags);
4979 if (!iwl_grab_nic_access(priv)) {
4980 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4981 APMG_CLK_VAL_DMA_CLK_RQT);
4982 iwl_release_nic_access(priv);
4983 }
4984 spin_unlock_irqrestore(&priv->lock, flags);
4985
4986 udelay(5);
4987
4988 iwl4965_hw_nic_stop_master(priv);
4989 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4990 iwl4965_hw_nic_reset(priv);
4991 priv->cfg->ops->lib->free_shared_mem(priv);
4992
4993 exit:
4994 memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
4995
4996 if (priv->ibss_beacon)
4997 dev_kfree_skb(priv->ibss_beacon);
4998 priv->ibss_beacon = NULL;
4999
5000 /* clear out any free frames */
5001 iwl4965_clear_free_frames(priv);
5002 }
5003
5004 static void iwl4965_down(struct iwl_priv *priv)
5005 {
5006 mutex_lock(&priv->mutex);
5007 __iwl4965_down(priv);
5008 mutex_unlock(&priv->mutex);
5009
5010 iwl4965_cancel_deferred_work(priv);
5011 }
5012
5013 #define MAX_HW_RESTARTS 5
5014
5015 static int __iwl4965_up(struct iwl_priv *priv)
5016 {
5017 int i;
5018 int ret;
5019
5020 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5021 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5022 return -EIO;
5023 }
5024
5025 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5026 IWL_WARNING("Radio disabled by SW RF kill (module "
5027 "parameter)\n");
5028 iwl_rfkill_set_hw_state(priv);
5029 return -ENODEV;
5030 }
5031
5032 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5033 IWL_ERROR("ucode not available for device bringup\n");
5034 return -EIO;
5035 }
5036
5037 /* If platform's RF_KILL switch is NOT set to KILL */
5038 if (iwl_read32(priv, CSR_GP_CNTRL) &
5039 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5040 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5041 else {
5042 set_bit(STATUS_RF_KILL_HW, &priv->status);
5043 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5044 iwl_rfkill_set_hw_state(priv);
5045 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5046 return -ENODEV;
5047 }
5048 }
5049
5050 iwl_rfkill_set_hw_state(priv);
5051 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5052
5053 ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
5054 if (ret) {
5055 IWL_ERROR("Unable to allocate shared memory\n");
5056 return ret;
5057 }
5058
5059 ret = priv->cfg->ops->lib->hw_nic_init(priv);
5060 if (ret) {
5061 IWL_ERROR("Unable to init nic\n");
5062 return ret;
5063 }
5064
5065 /* make sure rfkill handshake bits are cleared */
5066 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5067 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5068 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5069
5070 /* clear (again), then enable host interrupts */
5071 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5072 iwl4965_enable_interrupts(priv);
5073
5074 /* really make sure rfkill handshake bits are cleared */
5075 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5076 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5077
5078 /* Copy original ucode data image from disk into backup cache.
5079 * This will be used to initialize the on-board processor's
5080 * data SRAM for a clean start when the runtime program first loads. */
5081 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5082 priv->ucode_data.len);
5083
5084 /* We return success when we resume from suspend and rf_kill is on. */
5085 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5086 return 0;
5087
5088 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5089
5090 iwlcore_clear_stations_table(priv);
5091
5092 /* load bootstrap state machine,
5093 * load bootstrap program into processor's memory,
5094 * prepare to load the "initialize" uCode */
5095 ret = priv->cfg->ops->lib->load_ucode(priv);
5096
5097 if (ret) {
5098 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5099 continue;
5100 }
5101
5102 /* start card; "initialize" will load runtime ucode */
5103 iwl4965_nic_start(priv);
5104
5105 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5106
5107 return 0;
5108 }
5109
5110 set_bit(STATUS_EXIT_PENDING, &priv->status);
5111 __iwl4965_down(priv);
5112
5113 /* tried to restart and config the device for as long as our
5114 * patience could withstand */
5115 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5116 return -EIO;
5117 }
5118
5119
5120 /*****************************************************************************
5121 *
5122 * Workqueue callbacks
5123 *
5124 *****************************************************************************/
5125
5126 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5127 {
5128 struct iwl_priv *priv =
5129 container_of(data, struct iwl_priv, init_alive_start.work);
5130
5131 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5132 return;
5133
5134 mutex_lock(&priv->mutex);
5135 iwl4965_init_alive_start(priv);
5136 mutex_unlock(&priv->mutex);
5137 }
5138
5139 static void iwl4965_bg_alive_start(struct work_struct *data)
5140 {
5141 struct iwl_priv *priv =
5142 container_of(data, struct iwl_priv, alive_start.work);
5143
5144 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5145 return;
5146
5147 mutex_lock(&priv->mutex);
5148 iwl4965_alive_start(priv);
5149 mutex_unlock(&priv->mutex);
5150 }
5151
5152 static void iwl4965_bg_rf_kill(struct work_struct *work)
5153 {
5154 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5155
5156 wake_up_interruptible(&priv->wait_command_queue);
5157
5158 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5159 return;
5160
5161 mutex_lock(&priv->mutex);
5162
5163 if (!iwl_is_rfkill(priv)) {
5164 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5165 "HW and/or SW RF Kill no longer active, restarting "
5166 "device\n");
5167 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5168 queue_work(priv->workqueue, &priv->restart);
5169 } else {
5170 /* make sure mac80211 stop sending Tx frame */
5171 if (priv->mac80211_registered)
5172 ieee80211_stop_queues(priv->hw);
5173
5174 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5175 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5176 "disabled by SW switch\n");
5177 else
5178 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5179 "Kill switch must be turned off for "
5180 "wireless networking to work.\n");
5181 }
5182 iwl_rfkill_set_hw_state(priv);
5183
5184 mutex_unlock(&priv->mutex);
5185 }
5186
5187 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5188
5189 static void iwl4965_bg_scan_check(struct work_struct *data)
5190 {
5191 struct iwl_priv *priv =
5192 container_of(data, struct iwl_priv, scan_check.work);
5193
5194 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5195 return;
5196
5197 mutex_lock(&priv->mutex);
5198 if (test_bit(STATUS_SCANNING, &priv->status) ||
5199 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5200 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5201 "Scan completion watchdog resetting adapter (%dms)\n",
5202 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5203
5204 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5205 iwl4965_send_scan_abort(priv);
5206 }
5207 mutex_unlock(&priv->mutex);
5208 }
5209
5210 static void iwl4965_bg_request_scan(struct work_struct *data)
5211 {
5212 struct iwl_priv *priv =
5213 container_of(data, struct iwl_priv, request_scan);
5214 struct iwl_host_cmd cmd = {
5215 .id = REPLY_SCAN_CMD,
5216 .len = sizeof(struct iwl4965_scan_cmd),
5217 .meta.flags = CMD_SIZE_HUGE,
5218 };
5219 struct iwl4965_scan_cmd *scan;
5220 struct ieee80211_conf *conf = NULL;
5221 u16 cmd_len;
5222 enum ieee80211_band band;
5223 u8 direct_mask;
5224 int ret = 0;
5225
5226 conf = ieee80211_get_hw_conf(priv->hw);
5227
5228 mutex_lock(&priv->mutex);
5229
5230 if (!iwl_is_ready(priv)) {
5231 IWL_WARNING("request scan called when driver not ready.\n");
5232 goto done;
5233 }
5234
5235 /* Make sure the scan wasn't cancelled before this queued work
5236 * was given the chance to run... */
5237 if (!test_bit(STATUS_SCANNING, &priv->status))
5238 goto done;
5239
5240 /* This should never be called or scheduled if there is currently
5241 * a scan active in the hardware. */
5242 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5243 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5244 "Ignoring second request.\n");
5245 ret = -EIO;
5246 goto done;
5247 }
5248
5249 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5250 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5251 goto done;
5252 }
5253
5254 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5255 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
5256 goto done;
5257 }
5258
5259 if (iwl_is_rfkill(priv)) {
5260 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5261 goto done;
5262 }
5263
5264 if (!test_bit(STATUS_READY, &priv->status)) {
5265 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
5266 goto done;
5267 }
5268
5269 if (!priv->scan_bands) {
5270 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5271 goto done;
5272 }
5273
5274 if (!priv->scan) {
5275 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5276 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5277 if (!priv->scan) {
5278 ret = -ENOMEM;
5279 goto done;
5280 }
5281 }
5282 scan = priv->scan;
5283 memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5284
5285 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5286 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5287
5288 if (iwl_is_associated(priv)) {
5289 u16 interval = 0;
5290 u32 extra;
5291 u32 suspend_time = 100;
5292 u32 scan_suspend_time = 100;
5293 unsigned long flags;
5294
5295 IWL_DEBUG_INFO("Scanning while associated...\n");
5296
5297 spin_lock_irqsave(&priv->lock, flags);
5298 interval = priv->beacon_int;
5299 spin_unlock_irqrestore(&priv->lock, flags);
5300
5301 scan->suspend_time = 0;
5302 scan->max_out_time = cpu_to_le32(200 * 1024);
5303 if (!interval)
5304 interval = suspend_time;
5305
5306 extra = (suspend_time / interval) << 22;
5307 scan_suspend_time = (extra |
5308 ((suspend_time % interval) * 1024));
5309 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5310 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5311 scan_suspend_time, interval);
5312 }
5313
5314 /* We should add the ability for user to lock to PASSIVE ONLY */
5315 if (priv->one_direct_scan) {
5316 IWL_DEBUG_SCAN
5317 ("Kicking off one direct scan for '%s'\n",
5318 iwl4965_escape_essid(priv->direct_ssid,
5319 priv->direct_ssid_len));
5320 scan->direct_scan[0].id = WLAN_EID_SSID;
5321 scan->direct_scan[0].len = priv->direct_ssid_len;
5322 memcpy(scan->direct_scan[0].ssid,
5323 priv->direct_ssid, priv->direct_ssid_len);
5324 direct_mask = 1;
5325 } else if (!iwl_is_associated(priv) && priv->essid_len) {
5326 IWL_DEBUG_SCAN
5327 ("Kicking off one direct scan for '%s' when not associated\n",
5328 iwl4965_escape_essid(priv->essid, priv->essid_len));
5329 scan->direct_scan[0].id = WLAN_EID_SSID;
5330 scan->direct_scan[0].len = priv->essid_len;
5331 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5332 direct_mask = 1;
5333 } else {
5334 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5335 direct_mask = 0;
5336 }
5337
5338 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5339 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5340 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5341
5342
5343 switch (priv->scan_bands) {
5344 case 2:
5345 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5346 scan->tx_cmd.rate_n_flags =
5347 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5348 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5349
5350 scan->good_CRC_th = 0;
5351 band = IEEE80211_BAND_2GHZ;
5352 break;
5353
5354 case 1:
5355 scan->tx_cmd.rate_n_flags =
5356 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5357 RATE_MCS_ANT_B_MSK);
5358 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5359 band = IEEE80211_BAND_5GHZ;
5360 break;
5361
5362 default:
5363 IWL_WARNING("Invalid scan band count\n");
5364 goto done;
5365 }
5366
5367 /* We don't build a direct scan probe request; the uCode will do
5368 * that based on the direct_mask added to each channel entry */
5369 cmd_len = iwl4965_fill_probe_req(priv, band,
5370 (struct ieee80211_mgmt *)scan->data,
5371 IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5372
5373 scan->tx_cmd.len = cpu_to_le16(cmd_len);
5374 /* select Rx chains */
5375
5376 /* Force use of chains B and C (0x6) for scan Rx.
5377 * Avoid A (0x1) because of its off-channel reception on A-band.
5378 * MIMO is not used here, but value is required to make uCode happy. */
5379 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5380 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5381 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5382 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5383
5384 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5385 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5386
5387 if (direct_mask)
5388 scan->channel_count =
5389 iwl4965_get_channels_for_scan(
5390 priv, band, 1, /* active */
5391 direct_mask,
5392 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5393 else
5394 scan->channel_count =
5395 iwl4965_get_channels_for_scan(
5396 priv, band, 0, /* passive */
5397 direct_mask,
5398 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5399
5400 scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5401 RXON_FILTER_BCON_AWARE_MSK);
5402 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5403 scan->channel_count * sizeof(struct iwl4965_scan_channel);
5404 cmd.data = scan;
5405 scan->len = cpu_to_le16(cmd.len);
5406
5407 set_bit(STATUS_SCAN_HW, &priv->status);
5408 ret = iwl_send_cmd_sync(priv, &cmd);
5409 if (ret)
5410 goto done;
5411
5412 queue_delayed_work(priv->workqueue, &priv->scan_check,
5413 IWL_SCAN_CHECK_WATCHDOG);
5414
5415 mutex_unlock(&priv->mutex);
5416 return;
5417
5418 done:
5419 /* inform mac80211 scan aborted */
5420 queue_work(priv->workqueue, &priv->scan_completed);
5421 mutex_unlock(&priv->mutex);
5422 }
5423
5424 static void iwl4965_bg_up(struct work_struct *data)
5425 {
5426 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5427
5428 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5429 return;
5430
5431 mutex_lock(&priv->mutex);
5432 __iwl4965_up(priv);
5433 mutex_unlock(&priv->mutex);
5434 }
5435
5436 static void iwl4965_bg_restart(struct work_struct *data)
5437 {
5438 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5439
5440 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5441 return;
5442
5443 iwl4965_down(priv);
5444 queue_work(priv->workqueue, &priv->up);
5445 }
5446
5447 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5448 {
5449 struct iwl_priv *priv =
5450 container_of(data, struct iwl_priv, rx_replenish);
5451
5452 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5453 return;
5454
5455 mutex_lock(&priv->mutex);
5456 iwl4965_rx_replenish(priv);
5457 mutex_unlock(&priv->mutex);
5458 }
5459
5460 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5461
5462 static void iwl4965_post_associate(struct iwl_priv *priv)
5463 {
5464 struct ieee80211_conf *conf = NULL;
5465 int ret = 0;
5466 DECLARE_MAC_BUF(mac);
5467
5468 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5469 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5470 return;
5471 }
5472
5473 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5474 priv->assoc_id,
5475 print_mac(mac, priv->active_rxon.bssid_addr));
5476
5477
5478 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5479 return;
5480
5481
5482 if (!priv->vif || !priv->is_open)
5483 return;
5484
5485 iwl4965_scan_cancel_timeout(priv, 200);
5486
5487 conf = ieee80211_get_hw_conf(priv->hw);
5488
5489 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5490 iwl4965_commit_rxon(priv);
5491
5492 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5493 iwl4965_setup_rxon_timing(priv);
5494 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5495 sizeof(priv->rxon_timing), &priv->rxon_timing);
5496 if (ret)
5497 IWL_WARNING("REPLY_RXON_TIMING failed - "
5498 "Attempting to continue.\n");
5499
5500 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5501
5502 #ifdef CONFIG_IWL4965_HT
5503 if (priv->current_ht_config.is_ht)
5504 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5505 #endif /* CONFIG_IWL4965_HT*/
5506 iwl_set_rxon_chain(priv);
5507 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5508
5509 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5510 priv->assoc_id, priv->beacon_int);
5511
5512 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5513 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5514 else
5515 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5516
5517 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5518 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5519 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5520 else
5521 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5522
5523 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5524 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5525
5526 }
5527
5528 iwl4965_commit_rxon(priv);
5529
5530 switch (priv->iw_mode) {
5531 case IEEE80211_IF_TYPE_STA:
5532 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5533 break;
5534
5535 case IEEE80211_IF_TYPE_IBSS:
5536
5537 /* clear out the station table */
5538 iwlcore_clear_stations_table(priv);
5539
5540 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5541 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5542 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5543 iwl4965_send_beacon_cmd(priv);
5544
5545 break;
5546
5547 default:
5548 IWL_ERROR("%s Should not be called in %d mode\n",
5549 __FUNCTION__, priv->iw_mode);
5550 break;
5551 }
5552
5553 iwl4965_sequence_reset(priv);
5554
5555 /* Enable Rx differential gain and sensitivity calibrations */
5556 iwl_chain_noise_reset(priv);
5557 priv->start_calib = 1;
5558
5559 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5560 priv->assoc_station_added = 1;
5561
5562 iwl4965_activate_qos(priv, 0);
5563
5564 iwl_power_update_mode(priv, 0);
5565 /* we have just associated, don't start scan too early */
5566 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5567 }
5568
5569
5570 static void iwl4965_bg_post_associate(struct work_struct *data)
5571 {
5572 struct iwl_priv *priv = container_of(data, struct iwl_priv,
5573 post_associate.work);
5574
5575 mutex_lock(&priv->mutex);
5576 iwl4965_post_associate(priv);
5577 mutex_unlock(&priv->mutex);
5578
5579 }
5580
5581 static void iwl4965_bg_abort_scan(struct work_struct *work)
5582 {
5583 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5584
5585 if (!iwl_is_ready(priv))
5586 return;
5587
5588 mutex_lock(&priv->mutex);
5589
5590 set_bit(STATUS_SCAN_ABORTING, &priv->status);
5591 iwl4965_send_scan_abort(priv);
5592
5593 mutex_unlock(&priv->mutex);
5594 }
5595
5596 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5597
5598 static void iwl4965_bg_scan_completed(struct work_struct *work)
5599 {
5600 struct iwl_priv *priv =
5601 container_of(work, struct iwl_priv, scan_completed);
5602
5603 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5604
5605 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5606 return;
5607
5608 if (test_bit(STATUS_CONF_PENDING, &priv->status))
5609 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5610
5611 ieee80211_scan_completed(priv->hw);
5612
5613 /* Since setting the TXPOWER may have been deferred while
5614 * performing the scan, fire one off */
5615 mutex_lock(&priv->mutex);
5616 iwl4965_hw_reg_send_txpower(priv);
5617 mutex_unlock(&priv->mutex);
5618 }
5619
5620 /*****************************************************************************
5621 *
5622 * mac80211 entry point functions
5623 *
5624 *****************************************************************************/
5625
5626 #define UCODE_READY_TIMEOUT (2 * HZ)
5627
5628 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5629 {
5630 struct iwl_priv *priv = hw->priv;
5631 int ret;
5632
5633 IWL_DEBUG_MAC80211("enter\n");
5634
5635 if (pci_enable_device(priv->pci_dev)) {
5636 IWL_ERROR("Fail to pci_enable_device\n");
5637 return -ENODEV;
5638 }
5639 pci_restore_state(priv->pci_dev);
5640 pci_enable_msi(priv->pci_dev);
5641
5642 ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5643 DRV_NAME, priv);
5644 if (ret) {
5645 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5646 goto out_disable_msi;
5647 }
5648
5649 /* we should be verifying the device is ready to be opened */
5650 mutex_lock(&priv->mutex);
5651
5652 memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5653 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5654 * ucode filename and max sizes are card-specific. */
5655
5656 if (!priv->ucode_code.len) {
5657 ret = iwl4965_read_ucode(priv);
5658 if (ret) {
5659 IWL_ERROR("Could not read microcode: %d\n", ret);
5660 mutex_unlock(&priv->mutex);
5661 goto out_release_irq;
5662 }
5663 }
5664
5665 ret = __iwl4965_up(priv);
5666
5667 mutex_unlock(&priv->mutex);
5668
5669 if (ret)
5670 goto out_release_irq;
5671
5672 IWL_DEBUG_INFO("Start UP work done.\n");
5673
5674 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5675 return 0;
5676
5677 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5678 * mac80211 will not be run successfully. */
5679 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5680 test_bit(STATUS_READY, &priv->status),
5681 UCODE_READY_TIMEOUT);
5682 if (!ret) {
5683 if (!test_bit(STATUS_READY, &priv->status)) {
5684 IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5685 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5686 ret = -ETIMEDOUT;
5687 goto out_release_irq;
5688 }
5689 }
5690
5691 priv->is_open = 1;
5692 IWL_DEBUG_MAC80211("leave\n");
5693 return 0;
5694
5695 out_release_irq:
5696 free_irq(priv->pci_dev->irq, priv);
5697 out_disable_msi:
5698 pci_disable_msi(priv->pci_dev);
5699 pci_disable_device(priv->pci_dev);
5700 priv->is_open = 0;
5701 IWL_DEBUG_MAC80211("leave - failed\n");
5702 return ret;
5703 }
5704
5705 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5706 {
5707 struct iwl_priv *priv = hw->priv;
5708
5709 IWL_DEBUG_MAC80211("enter\n");
5710
5711 if (!priv->is_open) {
5712 IWL_DEBUG_MAC80211("leave - skip\n");
5713 return;
5714 }
5715
5716 priv->is_open = 0;
5717
5718 if (iwl_is_ready_rf(priv)) {
5719 /* stop mac, cancel any scan request and clear
5720 * RXON_FILTER_ASSOC_MSK BIT
5721 */
5722 mutex_lock(&priv->mutex);
5723 iwl4965_scan_cancel_timeout(priv, 100);
5724 cancel_delayed_work(&priv->post_associate);
5725 mutex_unlock(&priv->mutex);
5726 }
5727
5728 iwl4965_down(priv);
5729
5730 flush_workqueue(priv->workqueue);
5731 free_irq(priv->pci_dev->irq, priv);
5732 pci_disable_msi(priv->pci_dev);
5733 pci_save_state(priv->pci_dev);
5734 pci_disable_device(priv->pci_dev);
5735
5736 IWL_DEBUG_MAC80211("leave\n");
5737 }
5738
5739 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5740 struct ieee80211_tx_control *ctl)
5741 {
5742 struct iwl_priv *priv = hw->priv;
5743
5744 IWL_DEBUG_MAC80211("enter\n");
5745
5746 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5747 IWL_DEBUG_MAC80211("leave - monitor\n");
5748 return -1;
5749 }
5750
5751 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5752 ctl->tx_rate->bitrate);
5753
5754 if (iwl4965_tx_skb(priv, skb, ctl))
5755 dev_kfree_skb_any(skb);
5756
5757 IWL_DEBUG_MAC80211("leave\n");
5758 return 0;
5759 }
5760
5761 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5762 struct ieee80211_if_init_conf *conf)
5763 {
5764 struct iwl_priv *priv = hw->priv;
5765 unsigned long flags;
5766 DECLARE_MAC_BUF(mac);
5767
5768 IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5769
5770 if (priv->vif) {
5771 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5772 return -EOPNOTSUPP;
5773 }
5774
5775 spin_lock_irqsave(&priv->lock, flags);
5776 priv->vif = conf->vif;
5777
5778 spin_unlock_irqrestore(&priv->lock, flags);
5779
5780 mutex_lock(&priv->mutex);
5781
5782 if (conf->mac_addr) {
5783 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
5784 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5785 }
5786
5787 if (iwl_is_ready(priv))
5788 iwl4965_set_mode(priv, conf->type);
5789
5790 mutex_unlock(&priv->mutex);
5791
5792 IWL_DEBUG_MAC80211("leave\n");
5793 return 0;
5794 }
5795
5796 /**
5797 * iwl4965_mac_config - mac80211 config callback
5798 *
5799 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5800 * be set inappropriately and the driver currently sets the hardware up to
5801 * use it whenever needed.
5802 */
5803 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
5804 {
5805 struct iwl_priv *priv = hw->priv;
5806 const struct iwl_channel_info *ch_info;
5807 unsigned long flags;
5808 int ret = 0;
5809
5810 mutex_lock(&priv->mutex);
5811 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5812
5813 priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
5814
5815 if (!iwl_is_ready(priv)) {
5816 IWL_DEBUG_MAC80211("leave - not ready\n");
5817 ret = -EIO;
5818 goto out;
5819 }
5820
5821 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
5822 test_bit(STATUS_SCANNING, &priv->status))) {
5823 IWL_DEBUG_MAC80211("leave - scanning\n");
5824 set_bit(STATUS_CONF_PENDING, &priv->status);
5825 mutex_unlock(&priv->mutex);
5826 return 0;
5827 }
5828
5829 spin_lock_irqsave(&priv->lock, flags);
5830
5831 ch_info = iwl_get_channel_info(priv, conf->channel->band,
5832 ieee80211_frequency_to_channel(conf->channel->center_freq));
5833 if (!is_channel_valid(ch_info)) {
5834 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5835 spin_unlock_irqrestore(&priv->lock, flags);
5836 ret = -EINVAL;
5837 goto out;
5838 }
5839
5840 #ifdef CONFIG_IWL4965_HT
5841 /* if we are switching from ht to 2.4 clear flags
5842 * from any ht related info since 2.4 does not
5843 * support ht */
5844 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
5845 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5846 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
5847 #endif
5848 )
5849 priv->staging_rxon.flags = 0;
5850 #endif /* CONFIG_IWL4965_HT */
5851
5852 iwl_set_rxon_channel(priv, conf->channel->band,
5853 ieee80211_frequency_to_channel(conf->channel->center_freq));
5854
5855 iwl4965_set_flags_for_phymode(priv, conf->channel->band);
5856
5857 /* The list of supported rates and rate mask can be different
5858 * for each band; since the band may have changed, reset
5859 * the rate mask to what mac80211 lists */
5860 iwl4965_set_rate(priv);
5861
5862 spin_unlock_irqrestore(&priv->lock, flags);
5863
5864 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5865 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5866 iwl4965_hw_channel_switch(priv, conf->channel);
5867 goto out;
5868 }
5869 #endif
5870
5871 if (priv->cfg->ops->lib->radio_kill_sw)
5872 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
5873
5874 if (!conf->radio_enabled) {
5875 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5876 goto out;
5877 }
5878
5879 if (iwl_is_rfkill(priv)) {
5880 IWL_DEBUG_MAC80211("leave - RF kill\n");
5881 ret = -EIO;
5882 goto out;
5883 }
5884
5885 iwl4965_set_rate(priv);
5886
5887 if (memcmp(&priv->active_rxon,
5888 &priv->staging_rxon, sizeof(priv->staging_rxon)))
5889 iwl4965_commit_rxon(priv);
5890 else
5891 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5892
5893 IWL_DEBUG_MAC80211("leave\n");
5894
5895 out:
5896 clear_bit(STATUS_CONF_PENDING, &priv->status);
5897 mutex_unlock(&priv->mutex);
5898 return ret;
5899 }
5900
5901 static void iwl4965_config_ap(struct iwl_priv *priv)
5902 {
5903 int ret = 0;
5904
5905 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5906 return;
5907
5908 /* The following should be done only at AP bring up */
5909 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
5910
5911 /* RXON - unassoc (to set timing command) */
5912 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5913 iwl4965_commit_rxon(priv);
5914
5915 /* RXON Timing */
5916 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5917 iwl4965_setup_rxon_timing(priv);
5918 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5919 sizeof(priv->rxon_timing), &priv->rxon_timing);
5920 if (ret)
5921 IWL_WARNING("REPLY_RXON_TIMING failed - "
5922 "Attempting to continue.\n");
5923
5924 iwl_set_rxon_chain(priv);
5925
5926 /* FIXME: what should be the assoc_id for AP? */
5927 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5928 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5929 priv->staging_rxon.flags |=
5930 RXON_FLG_SHORT_PREAMBLE_MSK;
5931 else
5932 priv->staging_rxon.flags &=
5933 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5934
5935 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5936 if (priv->assoc_capability &
5937 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5938 priv->staging_rxon.flags |=
5939 RXON_FLG_SHORT_SLOT_MSK;
5940 else
5941 priv->staging_rxon.flags &=
5942 ~RXON_FLG_SHORT_SLOT_MSK;
5943
5944 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5945 priv->staging_rxon.flags &=
5946 ~RXON_FLG_SHORT_SLOT_MSK;
5947 }
5948 /* restore RXON assoc */
5949 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5950 iwl4965_commit_rxon(priv);
5951 iwl4965_activate_qos(priv, 1);
5952 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5953 }
5954 iwl4965_send_beacon_cmd(priv);
5955
5956 /* FIXME - we need to add code here to detect a totally new
5957 * configuration, reset the AP, unassoc, rxon timing, assoc,
5958 * clear sta table, add BCAST sta... */
5959 }
5960
5961 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
5962 struct ieee80211_vif *vif,
5963 struct ieee80211_if_conf *conf)
5964 {
5965 struct iwl_priv *priv = hw->priv;
5966 DECLARE_MAC_BUF(mac);
5967 unsigned long flags;
5968 int rc;
5969
5970 if (conf == NULL)
5971 return -EIO;
5972
5973 if (priv->vif != vif) {
5974 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5975 return 0;
5976 }
5977
5978 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
5979 (!conf->beacon || !conf->ssid_len)) {
5980 IWL_DEBUG_MAC80211
5981 ("Leaving in AP mode because HostAPD is not ready.\n");
5982 return 0;
5983 }
5984
5985 if (!iwl_is_alive(priv))
5986 return -EAGAIN;
5987
5988 mutex_lock(&priv->mutex);
5989
5990 if (conf->bssid)
5991 IWL_DEBUG_MAC80211("bssid: %s\n",
5992 print_mac(mac, conf->bssid));
5993
5994 /*
5995 * very dubious code was here; the probe filtering flag is never set:
5996 *
5997 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
5998 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
5999 */
6000
6001 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6002 if (!conf->bssid) {
6003 conf->bssid = priv->mac_addr;
6004 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6005 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6006 print_mac(mac, conf->bssid));
6007 }
6008 if (priv->ibss_beacon)
6009 dev_kfree_skb(priv->ibss_beacon);
6010
6011 priv->ibss_beacon = conf->beacon;
6012 }
6013
6014 if (iwl_is_rfkill(priv))
6015 goto done;
6016
6017 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6018 !is_multicast_ether_addr(conf->bssid)) {
6019 /* If there is currently a HW scan going on in the background
6020 * then we need to cancel it else the RXON below will fail. */
6021 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6022 IWL_WARNING("Aborted scan still in progress "
6023 "after 100ms\n");
6024 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6025 mutex_unlock(&priv->mutex);
6026 return -EAGAIN;
6027 }
6028 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6029
6030 /* TODO: Audit driver for usage of these members and see
6031 * if mac80211 deprecates them (priv->bssid looks like it
6032 * shouldn't be there, but I haven't scanned the IBSS code
6033 * to verify) - jpk */
6034 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6035
6036 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6037 iwl4965_config_ap(priv);
6038 else {
6039 rc = iwl4965_commit_rxon(priv);
6040 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6041 iwl4965_rxon_add_station(
6042 priv, priv->active_rxon.bssid_addr, 1);
6043 }
6044
6045 } else {
6046 iwl4965_scan_cancel_timeout(priv, 100);
6047 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6048 iwl4965_commit_rxon(priv);
6049 }
6050
6051 done:
6052 spin_lock_irqsave(&priv->lock, flags);
6053 if (!conf->ssid_len)
6054 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6055 else
6056 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6057
6058 priv->essid_len = conf->ssid_len;
6059 spin_unlock_irqrestore(&priv->lock, flags);
6060
6061 IWL_DEBUG_MAC80211("leave\n");
6062 mutex_unlock(&priv->mutex);
6063
6064 return 0;
6065 }
6066
6067 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6068 unsigned int changed_flags,
6069 unsigned int *total_flags,
6070 int mc_count, struct dev_addr_list *mc_list)
6071 {
6072 /*
6073 * XXX: dummy
6074 * see also iwl4965_connection_init_rx_config
6075 */
6076 *total_flags = 0;
6077 }
6078
6079 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6080 struct ieee80211_if_init_conf *conf)
6081 {
6082 struct iwl_priv *priv = hw->priv;
6083
6084 IWL_DEBUG_MAC80211("enter\n");
6085
6086 mutex_lock(&priv->mutex);
6087
6088 if (iwl_is_ready_rf(priv)) {
6089 iwl4965_scan_cancel_timeout(priv, 100);
6090 cancel_delayed_work(&priv->post_associate);
6091 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6092 iwl4965_commit_rxon(priv);
6093 }
6094 if (priv->vif == conf->vif) {
6095 priv->vif = NULL;
6096 memset(priv->bssid, 0, ETH_ALEN);
6097 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6098 priv->essid_len = 0;
6099 }
6100 mutex_unlock(&priv->mutex);
6101
6102 IWL_DEBUG_MAC80211("leave\n");
6103
6104 }
6105
6106 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6107 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6108 struct ieee80211_vif *vif,
6109 struct ieee80211_bss_conf *bss_conf,
6110 u32 changes)
6111 {
6112 struct iwl_priv *priv = hw->priv;
6113
6114 IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6115
6116 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6117 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6118 bss_conf->use_short_preamble);
6119 if (bss_conf->use_short_preamble)
6120 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6121 else
6122 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6123 }
6124
6125 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6126 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6127 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6128 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6129 else
6130 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6131 }
6132
6133 if (changes & BSS_CHANGED_HT) {
6134 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6135 iwl4965_ht_conf(priv, bss_conf);
6136 iwl_set_rxon_chain(priv);
6137 }
6138
6139 if (changes & BSS_CHANGED_ASSOC) {
6140 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6141 /* This should never happen as this function should
6142 * never be called from interrupt context. */
6143 if (WARN_ON_ONCE(in_interrupt()))
6144 return;
6145 if (bss_conf->assoc) {
6146 priv->assoc_id = bss_conf->aid;
6147 priv->beacon_int = bss_conf->beacon_int;
6148 priv->timestamp = bss_conf->timestamp;
6149 priv->assoc_capability = bss_conf->assoc_capability;
6150 priv->next_scan_jiffies = jiffies +
6151 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6152 mutex_lock(&priv->mutex);
6153 iwl4965_post_associate(priv);
6154 mutex_unlock(&priv->mutex);
6155 } else {
6156 priv->assoc_id = 0;
6157 IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6158 }
6159 } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6160 IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6161 iwl_send_rxon_assoc(priv);
6162 }
6163
6164 }
6165
6166 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6167 {
6168 int rc = 0;
6169 unsigned long flags;
6170 struct iwl_priv *priv = hw->priv;
6171
6172 IWL_DEBUG_MAC80211("enter\n");
6173
6174 mutex_lock(&priv->mutex);
6175 spin_lock_irqsave(&priv->lock, flags);
6176
6177 if (!iwl_is_ready_rf(priv)) {
6178 rc = -EIO;
6179 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6180 goto out_unlock;
6181 }
6182
6183 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
6184 rc = -EIO;
6185 IWL_ERROR("ERROR: APs don't scan\n");
6186 goto out_unlock;
6187 }
6188
6189 /* we don't schedule scan within next_scan_jiffies period */
6190 if (priv->next_scan_jiffies &&
6191 time_after(priv->next_scan_jiffies, jiffies)) {
6192 rc = -EAGAIN;
6193 goto out_unlock;
6194 }
6195 /* if we just finished scan ask for delay */
6196 if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6197 IWL_DELAY_NEXT_SCAN, jiffies)) {
6198 rc = -EAGAIN;
6199 goto out_unlock;
6200 }
6201 if (len) {
6202 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6203 iwl4965_escape_essid(ssid, len), (int)len);
6204
6205 priv->one_direct_scan = 1;
6206 priv->direct_ssid_len = (u8)
6207 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6208 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6209 } else
6210 priv->one_direct_scan = 0;
6211
6212 rc = iwl4965_scan_initiate(priv);
6213
6214 IWL_DEBUG_MAC80211("leave\n");
6215
6216 out_unlock:
6217 spin_unlock_irqrestore(&priv->lock, flags);
6218 mutex_unlock(&priv->mutex);
6219
6220 return rc;
6221 }
6222
6223 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6224 struct ieee80211_key_conf *keyconf, const u8 *addr,
6225 u32 iv32, u16 *phase1key)
6226 {
6227 struct iwl_priv *priv = hw->priv;
6228 u8 sta_id = IWL_INVALID_STATION;
6229 unsigned long flags;
6230 __le16 key_flags = 0;
6231 int i;
6232 DECLARE_MAC_BUF(mac);
6233
6234 IWL_DEBUG_MAC80211("enter\n");
6235
6236 sta_id = iwl_find_station(priv, addr);
6237 if (sta_id == IWL_INVALID_STATION) {
6238 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6239 print_mac(mac, addr));
6240 return;
6241 }
6242
6243 iwl4965_scan_cancel_timeout(priv, 100);
6244
6245 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6246 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6247 key_flags &= ~STA_KEY_FLG_INVALID;
6248
6249 if (sta_id == priv->hw_params.bcast_sta_id)
6250 key_flags |= STA_KEY_MULTICAST_MSK;
6251
6252 spin_lock_irqsave(&priv->sta_lock, flags);
6253
6254 priv->stations[sta_id].sta.key.key_flags = key_flags;
6255 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6256
6257 for (i = 0; i < 5; i++)
6258 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6259 cpu_to_le16(phase1key[i]);
6260
6261 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6262 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6263
6264 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6265
6266 spin_unlock_irqrestore(&priv->sta_lock, flags);
6267
6268 IWL_DEBUG_MAC80211("leave\n");
6269 }
6270
6271 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6272 const u8 *local_addr, const u8 *addr,
6273 struct ieee80211_key_conf *key)
6274 {
6275 struct iwl_priv *priv = hw->priv;
6276 DECLARE_MAC_BUF(mac);
6277 int ret = 0;
6278 u8 sta_id = IWL_INVALID_STATION;
6279 u8 is_default_wep_key = 0;
6280
6281 IWL_DEBUG_MAC80211("enter\n");
6282
6283 if (priv->hw_params.sw_crypto) {
6284 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6285 return -EOPNOTSUPP;
6286 }
6287
6288 if (is_zero_ether_addr(addr))
6289 /* only support pairwise keys */
6290 return -EOPNOTSUPP;
6291
6292 sta_id = iwl_find_station(priv, addr);
6293 if (sta_id == IWL_INVALID_STATION) {
6294 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6295 print_mac(mac, addr));
6296 return -EINVAL;
6297
6298 }
6299
6300 mutex_lock(&priv->mutex);
6301 iwl4965_scan_cancel_timeout(priv, 100);
6302 mutex_unlock(&priv->mutex);
6303
6304 /* If we are getting WEP group key and we didn't receive any key mapping
6305 * so far, we are in legacy wep mode (group key only), otherwise we are
6306 * in 1X mode.
6307 * In legacy wep mode, we use another host command to the uCode */
6308 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6309 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6310 if (cmd == SET_KEY)
6311 is_default_wep_key = !priv->key_mapping_key;
6312 else
6313 is_default_wep_key = priv->default_wep_key;
6314 }
6315
6316 switch (cmd) {
6317 case SET_KEY:
6318 if (is_default_wep_key)
6319 ret = iwl_set_default_wep_key(priv, key);
6320 else
6321 ret = iwl_set_dynamic_key(priv, key, sta_id);
6322
6323 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6324 break;
6325 case DISABLE_KEY:
6326 if (is_default_wep_key)
6327 ret = iwl_remove_default_wep_key(priv, key);
6328 else
6329 ret = iwl_remove_dynamic_key(priv, key, sta_id);
6330
6331 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6332 break;
6333 default:
6334 ret = -EINVAL;
6335 }
6336
6337 IWL_DEBUG_MAC80211("leave\n");
6338
6339 return ret;
6340 }
6341
6342 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
6343 const struct ieee80211_tx_queue_params *params)
6344 {
6345 struct iwl_priv *priv = hw->priv;
6346 unsigned long flags;
6347 int q;
6348
6349 IWL_DEBUG_MAC80211("enter\n");
6350
6351 if (!iwl_is_ready_rf(priv)) {
6352 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6353 return -EIO;
6354 }
6355
6356 if (queue >= AC_NUM) {
6357 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6358 return 0;
6359 }
6360
6361 if (!priv->qos_data.qos_enable) {
6362 priv->qos_data.qos_active = 0;
6363 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6364 return 0;
6365 }
6366 q = AC_NUM - 1 - queue;
6367
6368 spin_lock_irqsave(&priv->lock, flags);
6369
6370 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6371 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6372 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6373 priv->qos_data.def_qos_parm.ac[q].edca_txop =
6374 cpu_to_le16((params->txop * 32));
6375
6376 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6377 priv->qos_data.qos_active = 1;
6378
6379 spin_unlock_irqrestore(&priv->lock, flags);
6380
6381 mutex_lock(&priv->mutex);
6382 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6383 iwl4965_activate_qos(priv, 1);
6384 else if (priv->assoc_id && iwl_is_associated(priv))
6385 iwl4965_activate_qos(priv, 0);
6386
6387 mutex_unlock(&priv->mutex);
6388
6389 IWL_DEBUG_MAC80211("leave\n");
6390 return 0;
6391 }
6392
6393 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6394 struct ieee80211_tx_queue_stats *stats)
6395 {
6396 struct iwl_priv *priv = hw->priv;
6397 int i, avail;
6398 struct iwl4965_tx_queue *txq;
6399 struct iwl4965_queue *q;
6400 unsigned long flags;
6401
6402 IWL_DEBUG_MAC80211("enter\n");
6403
6404 if (!iwl_is_ready_rf(priv)) {
6405 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6406 return -EIO;
6407 }
6408
6409 spin_lock_irqsave(&priv->lock, flags);
6410
6411 for (i = 0; i < AC_NUM; i++) {
6412 txq = &priv->txq[i];
6413 q = &txq->q;
6414 avail = iwl4965_queue_space(q);
6415
6416 stats[i].len = q->n_window - avail;
6417 stats[i].limit = q->n_window - q->high_mark;
6418 stats[i].count = q->n_window;
6419
6420 }
6421 spin_unlock_irqrestore(&priv->lock, flags);
6422
6423 IWL_DEBUG_MAC80211("leave\n");
6424
6425 return 0;
6426 }
6427
6428 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6429 struct ieee80211_low_level_stats *stats)
6430 {
6431 IWL_DEBUG_MAC80211("enter\n");
6432 IWL_DEBUG_MAC80211("leave\n");
6433
6434 return 0;
6435 }
6436
6437 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6438 {
6439 IWL_DEBUG_MAC80211("enter\n");
6440 IWL_DEBUG_MAC80211("leave\n");
6441
6442 return 0;
6443 }
6444
6445 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6446 {
6447 struct iwl_priv *priv = hw->priv;
6448 unsigned long flags;
6449
6450 mutex_lock(&priv->mutex);
6451 IWL_DEBUG_MAC80211("enter\n");
6452
6453 priv->lq_mngr.lq_ready = 0;
6454 #ifdef CONFIG_IWL4965_HT
6455 spin_lock_irqsave(&priv->lock, flags);
6456 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6457 spin_unlock_irqrestore(&priv->lock, flags);
6458 #endif /* CONFIG_IWL4965_HT */
6459
6460 iwl_reset_qos(priv);
6461
6462 cancel_delayed_work(&priv->post_associate);
6463
6464 spin_lock_irqsave(&priv->lock, flags);
6465 priv->assoc_id = 0;
6466 priv->assoc_capability = 0;
6467 priv->assoc_station_added = 0;
6468
6469 /* new association get rid of ibss beacon skb */
6470 if (priv->ibss_beacon)
6471 dev_kfree_skb(priv->ibss_beacon);
6472
6473 priv->ibss_beacon = NULL;
6474
6475 priv->beacon_int = priv->hw->conf.beacon_int;
6476 priv->timestamp = 0;
6477 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6478 priv->beacon_int = 0;
6479
6480 spin_unlock_irqrestore(&priv->lock, flags);
6481
6482 if (!iwl_is_ready_rf(priv)) {
6483 IWL_DEBUG_MAC80211("leave - not ready\n");
6484 mutex_unlock(&priv->mutex);
6485 return;
6486 }
6487
6488 /* we are restarting association process
6489 * clear RXON_FILTER_ASSOC_MSK bit
6490 */
6491 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6492 iwl4965_scan_cancel_timeout(priv, 100);
6493 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6494 iwl4965_commit_rxon(priv);
6495 }
6496
6497 iwl_power_update_mode(priv, 0);
6498
6499 /* Per mac80211.h: This is only used in IBSS mode... */
6500 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6501
6502 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6503 mutex_unlock(&priv->mutex);
6504 return;
6505 }
6506
6507 iwl4965_set_rate(priv);
6508
6509 mutex_unlock(&priv->mutex);
6510
6511 IWL_DEBUG_MAC80211("leave\n");
6512 }
6513
6514 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6515 struct ieee80211_tx_control *control)
6516 {
6517 struct iwl_priv *priv = hw->priv;
6518 unsigned long flags;
6519
6520 mutex_lock(&priv->mutex);
6521 IWL_DEBUG_MAC80211("enter\n");
6522
6523 if (!iwl_is_ready_rf(priv)) {
6524 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6525 mutex_unlock(&priv->mutex);
6526 return -EIO;
6527 }
6528
6529 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6530 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6531 mutex_unlock(&priv->mutex);
6532 return -EIO;
6533 }
6534
6535 spin_lock_irqsave(&priv->lock, flags);
6536
6537 if (priv->ibss_beacon)
6538 dev_kfree_skb(priv->ibss_beacon);
6539
6540 priv->ibss_beacon = skb;
6541
6542 priv->assoc_id = 0;
6543
6544 IWL_DEBUG_MAC80211("leave\n");
6545 spin_unlock_irqrestore(&priv->lock, flags);
6546
6547 iwl_reset_qos(priv);
6548
6549 queue_work(priv->workqueue, &priv->post_associate.work);
6550
6551 mutex_unlock(&priv->mutex);
6552
6553 return 0;
6554 }
6555
6556 /*****************************************************************************
6557 *
6558 * sysfs attributes
6559 *
6560 *****************************************************************************/
6561
6562 #ifdef CONFIG_IWLWIFI_DEBUG
6563
6564 /*
6565 * The following adds a new attribute to the sysfs representation
6566 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6567 * used for controlling the debug level.
6568 *
6569 * See the level definitions in iwl for details.
6570 */
6571
6572 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6573 {
6574 return sprintf(buf, "0x%08X\n", iwl_debug_level);
6575 }
6576 static ssize_t store_debug_level(struct device_driver *d,
6577 const char *buf, size_t count)
6578 {
6579 char *p = (char *)buf;
6580 u32 val;
6581
6582 val = simple_strtoul(p, &p, 0);
6583 if (p == buf)
6584 printk(KERN_INFO DRV_NAME
6585 ": %s is not in hex or decimal form.\n", buf);
6586 else
6587 iwl_debug_level = val;
6588
6589 return strnlen(buf, count);
6590 }
6591
6592 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6593 show_debug_level, store_debug_level);
6594
6595 #endif /* CONFIG_IWLWIFI_DEBUG */
6596
6597
6598 static ssize_t show_temperature(struct device *d,
6599 struct device_attribute *attr, char *buf)
6600 {
6601 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6602
6603 if (!iwl_is_alive(priv))
6604 return -EAGAIN;
6605
6606 return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6607 }
6608
6609 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6610
6611 static ssize_t show_rs_window(struct device *d,
6612 struct device_attribute *attr,
6613 char *buf)
6614 {
6615 struct iwl_priv *priv = d->driver_data;
6616 return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6617 }
6618 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6619
6620 static ssize_t show_tx_power(struct device *d,
6621 struct device_attribute *attr, char *buf)
6622 {
6623 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6624 return sprintf(buf, "%d\n", priv->user_txpower_limit);
6625 }
6626
6627 static ssize_t store_tx_power(struct device *d,
6628 struct device_attribute *attr,
6629 const char *buf, size_t count)
6630 {
6631 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6632 char *p = (char *)buf;
6633 u32 val;
6634
6635 val = simple_strtoul(p, &p, 10);
6636 if (p == buf)
6637 printk(KERN_INFO DRV_NAME
6638 ": %s is not in decimal form.\n", buf);
6639 else
6640 iwl4965_hw_reg_set_txpower(priv, val);
6641
6642 return count;
6643 }
6644
6645 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6646
6647 static ssize_t show_flags(struct device *d,
6648 struct device_attribute *attr, char *buf)
6649 {
6650 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6651
6652 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6653 }
6654
6655 static ssize_t store_flags(struct device *d,
6656 struct device_attribute *attr,
6657 const char *buf, size_t count)
6658 {
6659 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6660 u32 flags = simple_strtoul(buf, NULL, 0);
6661
6662 mutex_lock(&priv->mutex);
6663 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6664 /* Cancel any currently running scans... */
6665 if (iwl4965_scan_cancel_timeout(priv, 100))
6666 IWL_WARNING("Could not cancel scan.\n");
6667 else {
6668 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6669 flags);
6670 priv->staging_rxon.flags = cpu_to_le32(flags);
6671 iwl4965_commit_rxon(priv);
6672 }
6673 }
6674 mutex_unlock(&priv->mutex);
6675
6676 return count;
6677 }
6678
6679 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6680
6681 static ssize_t show_filter_flags(struct device *d,
6682 struct device_attribute *attr, char *buf)
6683 {
6684 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6685
6686 return sprintf(buf, "0x%04X\n",
6687 le32_to_cpu(priv->active_rxon.filter_flags));
6688 }
6689
6690 static ssize_t store_filter_flags(struct device *d,
6691 struct device_attribute *attr,
6692 const char *buf, size_t count)
6693 {
6694 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6695 u32 filter_flags = simple_strtoul(buf, NULL, 0);
6696
6697 mutex_lock(&priv->mutex);
6698 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
6699 /* Cancel any currently running scans... */
6700 if (iwl4965_scan_cancel_timeout(priv, 100))
6701 IWL_WARNING("Could not cancel scan.\n");
6702 else {
6703 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6704 "0x%04X\n", filter_flags);
6705 priv->staging_rxon.filter_flags =
6706 cpu_to_le32(filter_flags);
6707 iwl4965_commit_rxon(priv);
6708 }
6709 }
6710 mutex_unlock(&priv->mutex);
6711
6712 return count;
6713 }
6714
6715 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6716 store_filter_flags);
6717
6718 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
6719
6720 static ssize_t show_measurement(struct device *d,
6721 struct device_attribute *attr, char *buf)
6722 {
6723 struct iwl_priv *priv = dev_get_drvdata(d);
6724 struct iwl4965_spectrum_notification measure_report;
6725 u32 size = sizeof(measure_report), len = 0, ofs = 0;
6726 u8 *data = (u8 *) & measure_report;
6727 unsigned long flags;
6728
6729 spin_lock_irqsave(&priv->lock, flags);
6730 if (!(priv->measurement_status & MEASUREMENT_READY)) {
6731 spin_unlock_irqrestore(&priv->lock, flags);
6732 return 0;
6733 }
6734 memcpy(&measure_report, &priv->measure_report, size);
6735 priv->measurement_status = 0;
6736 spin_unlock_irqrestore(&priv->lock, flags);
6737
6738 while (size && (PAGE_SIZE - len)) {
6739 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6740 PAGE_SIZE - len, 1);
6741 len = strlen(buf);
6742 if (PAGE_SIZE - len)
6743 buf[len++] = '\n';
6744
6745 ofs += 16;
6746 size -= min(size, 16U);
6747 }
6748
6749 return len;
6750 }
6751
6752 static ssize_t store_measurement(struct device *d,
6753 struct device_attribute *attr,
6754 const char *buf, size_t count)
6755 {
6756 struct iwl_priv *priv = dev_get_drvdata(d);
6757 struct ieee80211_measurement_params params = {
6758 .channel = le16_to_cpu(priv->active_rxon.channel),
6759 .start_time = cpu_to_le64(priv->last_tsf),
6760 .duration = cpu_to_le16(1),
6761 };
6762 u8 type = IWL_MEASURE_BASIC;
6763 u8 buffer[32];
6764 u8 channel;
6765
6766 if (count) {
6767 char *p = buffer;
6768 strncpy(buffer, buf, min(sizeof(buffer), count));
6769 channel = simple_strtoul(p, NULL, 0);
6770 if (channel)
6771 params.channel = channel;
6772
6773 p = buffer;
6774 while (*p && *p != ' ')
6775 p++;
6776 if (*p)
6777 type = simple_strtoul(p + 1, NULL, 0);
6778 }
6779
6780 IWL_DEBUG_INFO("Invoking measurement of type %d on "
6781 "channel %d (for '%s')\n", type, params.channel, buf);
6782 iwl4965_get_measurement(priv, &params, type);
6783
6784 return count;
6785 }
6786
6787 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
6788 show_measurement, store_measurement);
6789 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
6790
6791 static ssize_t store_retry_rate(struct device *d,
6792 struct device_attribute *attr,
6793 const char *buf, size_t count)
6794 {
6795 struct iwl_priv *priv = dev_get_drvdata(d);
6796
6797 priv->retry_rate = simple_strtoul(buf, NULL, 0);
6798 if (priv->retry_rate <= 0)
6799 priv->retry_rate = 1;
6800
6801 return count;
6802 }
6803
6804 static ssize_t show_retry_rate(struct device *d,
6805 struct device_attribute *attr, char *buf)
6806 {
6807 struct iwl_priv *priv = dev_get_drvdata(d);
6808 return sprintf(buf, "%d", priv->retry_rate);
6809 }
6810
6811 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
6812 store_retry_rate);
6813
6814 static ssize_t store_power_level(struct device *d,
6815 struct device_attribute *attr,
6816 const char *buf, size_t count)
6817 {
6818 struct iwl_priv *priv = dev_get_drvdata(d);
6819 int rc;
6820 int mode;
6821
6822 mode = simple_strtoul(buf, NULL, 0);
6823 mutex_lock(&priv->mutex);
6824
6825 if (!iwl_is_ready(priv)) {
6826 rc = -EAGAIN;
6827 goto out;
6828 }
6829
6830 rc = iwl_power_set_user_mode(priv, mode);
6831 if (rc) {
6832 IWL_DEBUG_MAC80211("failed setting power mode.\n");
6833 goto out;
6834 }
6835 rc = count;
6836
6837 out:
6838 mutex_unlock(&priv->mutex);
6839 return rc;
6840 }
6841
6842 #define MAX_WX_STRING 80
6843
6844 /* Values are in microsecond */
6845 static const s32 timeout_duration[] = {
6846 350000,
6847 250000,
6848 75000,
6849 37000,
6850 25000,
6851 };
6852 static const s32 period_duration[] = {
6853 400000,
6854 700000,
6855 1000000,
6856 1000000,
6857 1000000
6858 };
6859
6860 static ssize_t show_power_level(struct device *d,
6861 struct device_attribute *attr, char *buf)
6862 {
6863 struct iwl_priv *priv = dev_get_drvdata(d);
6864 int level = priv->power_data.power_mode;
6865 char *p = buf;
6866
6867 p += sprintf(p, "%d ", level);
6868 switch (level) {
6869 case IWL_POWER_MODE_CAM:
6870 case IWL_POWER_AC:
6871 p += sprintf(p, "(AC)");
6872 break;
6873 case IWL_POWER_BATTERY:
6874 p += sprintf(p, "(BATTERY)");
6875 break;
6876 default:
6877 p += sprintf(p,
6878 "(Timeout %dms, Period %dms)",
6879 timeout_duration[level - 1] / 1000,
6880 period_duration[level - 1] / 1000);
6881 }
6882 /*
6883 if (!(priv->power_mode & IWL_POWER_ENABLED))
6884 p += sprintf(p, " OFF\n");
6885 else
6886 p += sprintf(p, " \n");
6887 */
6888 p += sprintf(p, " \n");
6889 return (p - buf + 1);
6890 }
6891
6892 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
6893 store_power_level);
6894
6895 static ssize_t show_channels(struct device *d,
6896 struct device_attribute *attr, char *buf)
6897 {
6898 /* all this shit doesn't belong into sysfs anyway */
6899 return 0;
6900 }
6901
6902 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
6903
6904 static ssize_t show_statistics(struct device *d,
6905 struct device_attribute *attr, char *buf)
6906 {
6907 struct iwl_priv *priv = dev_get_drvdata(d);
6908 u32 size = sizeof(struct iwl4965_notif_statistics);
6909 u32 len = 0, ofs = 0;
6910 u8 *data = (u8 *) & priv->statistics;
6911 int rc = 0;
6912
6913 if (!iwl_is_alive(priv))
6914 return -EAGAIN;
6915
6916 mutex_lock(&priv->mutex);
6917 rc = iwl_send_statistics_request(priv, 0);
6918 mutex_unlock(&priv->mutex);
6919
6920 if (rc) {
6921 len = sprintf(buf,
6922 "Error sending statistics request: 0x%08X\n", rc);
6923 return len;
6924 }
6925
6926 while (size && (PAGE_SIZE - len)) {
6927 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6928 PAGE_SIZE - len, 1);
6929 len = strlen(buf);
6930 if (PAGE_SIZE - len)
6931 buf[len++] = '\n';
6932
6933 ofs += 16;
6934 size -= min(size, 16U);
6935 }
6936
6937 return len;
6938 }
6939
6940 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
6941
6942 static ssize_t show_status(struct device *d,
6943 struct device_attribute *attr, char *buf)
6944 {
6945 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6946 if (!iwl_is_alive(priv))
6947 return -EAGAIN;
6948 return sprintf(buf, "0x%08x\n", (int)priv->status);
6949 }
6950
6951 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
6952
6953 static ssize_t dump_error_log(struct device *d,
6954 struct device_attribute *attr,
6955 const char *buf, size_t count)
6956 {
6957 char *p = (char *)buf;
6958
6959 if (p[0] == '1')
6960 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
6961
6962 return strnlen(buf, count);
6963 }
6964
6965 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
6966
6967 static ssize_t dump_event_log(struct device *d,
6968 struct device_attribute *attr,
6969 const char *buf, size_t count)
6970 {
6971 char *p = (char *)buf;
6972
6973 if (p[0] == '1')
6974 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
6975
6976 return strnlen(buf, count);
6977 }
6978
6979 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
6980
6981 /*****************************************************************************
6982 *
6983 * driver setup and teardown
6984 *
6985 *****************************************************************************/
6986
6987 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
6988 {
6989 priv->workqueue = create_workqueue(DRV_NAME);
6990
6991 init_waitqueue_head(&priv->wait_command_queue);
6992
6993 INIT_WORK(&priv->up, iwl4965_bg_up);
6994 INIT_WORK(&priv->restart, iwl4965_bg_restart);
6995 INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
6996 INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
6997 INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
6998 INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
6999 INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7000 INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7001 INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7002 INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7003 INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7004 INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7005
7006 iwl4965_hw_setup_deferred_work(priv);
7007
7008 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7009 iwl4965_irq_tasklet, (unsigned long)priv);
7010 }
7011
7012 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7013 {
7014 iwl4965_hw_cancel_deferred_work(priv);
7015
7016 cancel_delayed_work_sync(&priv->init_alive_start);
7017 cancel_delayed_work(&priv->scan_check);
7018 cancel_delayed_work(&priv->alive_start);
7019 cancel_delayed_work(&priv->post_associate);
7020 cancel_work_sync(&priv->beacon_update);
7021 }
7022
7023 static struct attribute *iwl4965_sysfs_entries[] = {
7024 &dev_attr_channels.attr,
7025 &dev_attr_dump_errors.attr,
7026 &dev_attr_dump_events.attr,
7027 &dev_attr_flags.attr,
7028 &dev_attr_filter_flags.attr,
7029 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7030 &dev_attr_measurement.attr,
7031 #endif
7032 &dev_attr_power_level.attr,
7033 &dev_attr_retry_rate.attr,
7034 &dev_attr_rs_window.attr,
7035 &dev_attr_statistics.attr,
7036 &dev_attr_status.attr,
7037 &dev_attr_temperature.attr,
7038 &dev_attr_tx_power.attr,
7039
7040 NULL
7041 };
7042
7043 static struct attribute_group iwl4965_attribute_group = {
7044 .name = NULL, /* put in device directory */
7045 .attrs = iwl4965_sysfs_entries,
7046 };
7047
7048 static struct ieee80211_ops iwl4965_hw_ops = {
7049 .tx = iwl4965_mac_tx,
7050 .start = iwl4965_mac_start,
7051 .stop = iwl4965_mac_stop,
7052 .add_interface = iwl4965_mac_add_interface,
7053 .remove_interface = iwl4965_mac_remove_interface,
7054 .config = iwl4965_mac_config,
7055 .config_interface = iwl4965_mac_config_interface,
7056 .configure_filter = iwl4965_configure_filter,
7057 .set_key = iwl4965_mac_set_key,
7058 .update_tkip_key = iwl4965_mac_update_tkip_key,
7059 .get_stats = iwl4965_mac_get_stats,
7060 .get_tx_stats = iwl4965_mac_get_tx_stats,
7061 .conf_tx = iwl4965_mac_conf_tx,
7062 .get_tsf = iwl4965_mac_get_tsf,
7063 .reset_tsf = iwl4965_mac_reset_tsf,
7064 .beacon_update = iwl4965_mac_beacon_update,
7065 .bss_info_changed = iwl4965_bss_info_changed,
7066 #ifdef CONFIG_IWL4965_HT
7067 .ampdu_action = iwl4965_mac_ampdu_action,
7068 #endif /* CONFIG_IWL4965_HT */
7069 .hw_scan = iwl4965_mac_hw_scan
7070 };
7071
7072 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7073 {
7074 int err = 0;
7075 struct iwl_priv *priv;
7076 struct ieee80211_hw *hw;
7077 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7078 unsigned long flags;
7079 DECLARE_MAC_BUF(mac);
7080
7081 /************************
7082 * 1. Allocating HW data
7083 ************************/
7084
7085 /* Disabling hardware scan means that mac80211 will perform scans
7086 * "the hard way", rather than using device's scan. */
7087 if (cfg->mod_params->disable_hw_scan) {
7088 IWL_DEBUG_INFO("Disabling hw_scan\n");
7089 iwl4965_hw_ops.hw_scan = NULL;
7090 }
7091
7092 hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7093 if (!hw) {
7094 err = -ENOMEM;
7095 goto out;
7096 }
7097 priv = hw->priv;
7098 /* At this point both hw and priv are allocated. */
7099
7100 SET_IEEE80211_DEV(hw, &pdev->dev);
7101
7102 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7103 priv->cfg = cfg;
7104 priv->pci_dev = pdev;
7105
7106 #ifdef CONFIG_IWLWIFI_DEBUG
7107 iwl_debug_level = priv->cfg->mod_params->debug;
7108 atomic_set(&priv->restrict_refcnt, 0);
7109 #endif
7110
7111 /**************************
7112 * 2. Initializing PCI bus
7113 **************************/
7114 if (pci_enable_device(pdev)) {
7115 err = -ENODEV;
7116 goto out_ieee80211_free_hw;
7117 }
7118
7119 pci_set_master(pdev);
7120
7121 err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
7122 if (!err)
7123 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
7124 if (err) {
7125 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7126 if (!err)
7127 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7128 /* both attempts failed: */
7129 if (err) {
7130 printk(KERN_WARNING "%s: No suitable DMA available.\n",
7131 DRV_NAME);
7132 goto out_pci_disable_device;
7133 }
7134 }
7135
7136 err = pci_request_regions(pdev, DRV_NAME);
7137 if (err)
7138 goto out_pci_disable_device;
7139
7140 pci_set_drvdata(pdev, priv);
7141
7142 /* We disable the RETRY_TIMEOUT register (0x41) to keep
7143 * PCI Tx retries from interfering with C3 CPU state */
7144 pci_write_config_byte(pdev, 0x41, 0x00);
7145
7146 /***********************
7147 * 3. Read REV register
7148 ***********************/
7149 priv->hw_base = pci_iomap(pdev, 0, 0);
7150 if (!priv->hw_base) {
7151 err = -ENODEV;
7152 goto out_pci_release_regions;
7153 }
7154
7155 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7156 (unsigned long long) pci_resource_len(pdev, 0));
7157 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7158
7159 iwl_hw_detect(priv);
7160 printk(KERN_INFO DRV_NAME
7161 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
7162 priv->cfg->name, priv->hw_rev);
7163
7164 /* amp init */
7165 err = priv->cfg->ops->lib->apm_ops.init(priv);
7166 if (err < 0) {
7167 IWL_DEBUG_INFO("Failed to init APMG\n");
7168 goto out_iounmap;
7169 }
7170 /*****************
7171 * 4. Read EEPROM
7172 *****************/
7173 /* Read the EEPROM */
7174 err = iwl_eeprom_init(priv);
7175 if (err) {
7176 IWL_ERROR("Unable to init EEPROM\n");
7177 goto out_iounmap;
7178 }
7179 err = iwl_eeprom_check_version(priv);
7180 if (err)
7181 goto out_iounmap;
7182
7183 /* MAC Address location in EEPROM same for 3945/4965 */
7184 iwl_eeprom_get_mac(priv, priv->mac_addr);
7185 IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7186 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7187
7188 /************************
7189 * 5. Setup HW constants
7190 ************************/
7191 /* Device-specific setup */
7192 if (priv->cfg->ops->lib->set_hw_params(priv)) {
7193 IWL_ERROR("failed to set hw parameters\n");
7194 goto out_free_eeprom;
7195 }
7196
7197 /*******************
7198 * 6. Setup hw/priv
7199 *******************/
7200
7201 err = iwl_setup(priv);
7202 if (err)
7203 goto out_free_eeprom;
7204 /* At this point both hw and priv are initialized. */
7205
7206 /**********************************
7207 * 7. Initialize module parameters
7208 **********************************/
7209
7210 /* Disable radio (SW RF KILL) via parameter when loading driver */
7211 if (priv->cfg->mod_params->disable) {
7212 set_bit(STATUS_RF_KILL_SW, &priv->status);
7213 IWL_DEBUG_INFO("Radio disabled.\n");
7214 }
7215
7216 if (priv->cfg->mod_params->enable_qos)
7217 priv->qos_data.qos_enable = 1;
7218
7219 /********************
7220 * 8. Setup services
7221 ********************/
7222 spin_lock_irqsave(&priv->lock, flags);
7223 iwl4965_disable_interrupts(priv);
7224 spin_unlock_irqrestore(&priv->lock, flags);
7225
7226 err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7227 if (err) {
7228 IWL_ERROR("failed to create sysfs device attributes\n");
7229 goto out_free_eeprom;
7230 }
7231
7232 err = iwl_dbgfs_register(priv, DRV_NAME);
7233 if (err) {
7234 IWL_ERROR("failed to create debugfs files\n");
7235 goto out_remove_sysfs;
7236 }
7237
7238 iwl4965_setup_deferred_work(priv);
7239 iwl4965_setup_rx_handlers(priv);
7240
7241 /********************
7242 * 9. Conclude
7243 ********************/
7244 pci_save_state(pdev);
7245 pci_disable_device(pdev);
7246
7247 /* notify iwlcore to init */
7248 iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7249 return 0;
7250
7251 out_remove_sysfs:
7252 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7253 out_free_eeprom:
7254 iwl_eeprom_free(priv);
7255 out_iounmap:
7256 pci_iounmap(pdev, priv->hw_base);
7257 out_pci_release_regions:
7258 pci_release_regions(pdev);
7259 pci_set_drvdata(pdev, NULL);
7260 out_pci_disable_device:
7261 pci_disable_device(pdev);
7262 out_ieee80211_free_hw:
7263 ieee80211_free_hw(priv->hw);
7264 out:
7265 return err;
7266 }
7267
7268 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7269 {
7270 struct iwl_priv *priv = pci_get_drvdata(pdev);
7271 struct list_head *p, *q;
7272 int i;
7273 unsigned long flags;
7274
7275 if (!priv)
7276 return;
7277
7278 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7279
7280 if (priv->mac80211_registered) {
7281 ieee80211_unregister_hw(priv->hw);
7282 priv->mac80211_registered = 0;
7283 }
7284
7285 set_bit(STATUS_EXIT_PENDING, &priv->status);
7286
7287 iwl4965_down(priv);
7288
7289 /* make sure we flush any pending irq or
7290 * tasklet for the driver
7291 */
7292 spin_lock_irqsave(&priv->lock, flags);
7293 iwl4965_disable_interrupts(priv);
7294 spin_unlock_irqrestore(&priv->lock, flags);
7295
7296 iwl_synchronize_irq(priv);
7297
7298 /* Free MAC hash list for ADHOC */
7299 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7300 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7301 list_del(p);
7302 kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7303 }
7304 }
7305
7306 iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7307 iwl_dbgfs_unregister(priv);
7308 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7309
7310 iwl4965_dealloc_ucode_pci(priv);
7311
7312 if (priv->rxq.bd)
7313 iwl4965_rx_queue_free(priv, &priv->rxq);
7314 iwl4965_hw_txq_ctx_free(priv);
7315
7316 iwlcore_clear_stations_table(priv);
7317 iwl_eeprom_free(priv);
7318
7319
7320 /*netif_stop_queue(dev); */
7321 flush_workqueue(priv->workqueue);
7322
7323 /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7324 * priv->workqueue... so we can't take down the workqueue
7325 * until now... */
7326 destroy_workqueue(priv->workqueue);
7327 priv->workqueue = NULL;
7328
7329 pci_iounmap(pdev, priv->hw_base);
7330 pci_release_regions(pdev);
7331 pci_disable_device(pdev);
7332 pci_set_drvdata(pdev, NULL);
7333
7334 iwl_free_channel_map(priv);
7335 iwlcore_free_geos(priv);
7336
7337 if (priv->ibss_beacon)
7338 dev_kfree_skb(priv->ibss_beacon);
7339
7340 ieee80211_free_hw(priv->hw);
7341 }
7342
7343 #ifdef CONFIG_PM
7344
7345 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7346 {
7347 struct iwl_priv *priv = pci_get_drvdata(pdev);
7348
7349 if (priv->is_open) {
7350 set_bit(STATUS_IN_SUSPEND, &priv->status);
7351 iwl4965_mac_stop(priv->hw);
7352 priv->is_open = 1;
7353 }
7354
7355 pci_set_power_state(pdev, PCI_D3hot);
7356
7357 return 0;
7358 }
7359
7360 static int iwl4965_pci_resume(struct pci_dev *pdev)
7361 {
7362 struct iwl_priv *priv = pci_get_drvdata(pdev);
7363
7364 pci_set_power_state(pdev, PCI_D0);
7365
7366 if (priv->is_open)
7367 iwl4965_mac_start(priv->hw);
7368
7369 clear_bit(STATUS_IN_SUSPEND, &priv->status);
7370 return 0;
7371 }
7372
7373 #endif /* CONFIG_PM */
7374
7375 /*****************************************************************************
7376 *
7377 * driver and module entry point
7378 *
7379 *****************************************************************************/
7380
7381 /* Hardware specific file defines the PCI IDs table for that hardware module */
7382 static struct pci_device_id iwl_hw_card_ids[] = {
7383 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7384 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7385 #ifdef CONFIG_IWL5000
7386 {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
7387 {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
7388 {IWL_PCI_DEVICE(0x423A, PCI_ANY_ID, iwl5350_agn_cfg)},
7389 #endif /* CONFIG_IWL5000 */
7390 {0}
7391 };
7392 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7393
7394 static struct pci_driver iwl_driver = {
7395 .name = DRV_NAME,
7396 .id_table = iwl_hw_card_ids,
7397 .probe = iwl4965_pci_probe,
7398 .remove = __devexit_p(iwl4965_pci_remove),
7399 #ifdef CONFIG_PM
7400 .suspend = iwl4965_pci_suspend,
7401 .resume = iwl4965_pci_resume,
7402 #endif
7403 };
7404
7405 static int __init iwl4965_init(void)
7406 {
7407
7408 int ret;
7409 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7410 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7411
7412 ret = iwl4965_rate_control_register();
7413 if (ret) {
7414 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7415 return ret;
7416 }
7417
7418 ret = pci_register_driver(&iwl_driver);
7419 if (ret) {
7420 IWL_ERROR("Unable to initialize PCI module\n");
7421 goto error_register;
7422 }
7423 #ifdef CONFIG_IWLWIFI_DEBUG
7424 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7425 if (ret) {
7426 IWL_ERROR("Unable to create driver sysfs file\n");
7427 goto error_debug;
7428 }
7429 #endif
7430
7431 return ret;
7432
7433 #ifdef CONFIG_IWLWIFI_DEBUG
7434 error_debug:
7435 pci_unregister_driver(&iwl_driver);
7436 #endif
7437 error_register:
7438 iwl4965_rate_control_unregister();
7439 return ret;
7440 }
7441
7442 static void __exit iwl4965_exit(void)
7443 {
7444 #ifdef CONFIG_IWLWIFI_DEBUG
7445 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7446 #endif
7447 pci_unregister_driver(&iwl_driver);
7448 iwl4965_rate_control_unregister();
7449 }
7450
7451 module_exit(iwl4965_exit);
7452 module_init(iwl4965_init);
Linux kernel - Deliverables
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