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iwlwifi: HW crypto acceleration fixes
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl4965-base.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/version.h>
33 #include <linux/init.h>
34 #include <linux/pci.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/delay.h>
37 #include <linux/skbuff.h>
38 #include <linux/netdevice.h>
39 #include <linux/wireless.h>
40 #include <linux/firmware.h>
41 #include <linux/etherdevice.h>
42 #include <linux/if_arp.h>
43
44 #include <net/mac80211.h>
45
46 #include <asm/div64.h>
47
48 #include "iwl-eeprom.h"
49 #include "iwl-4965.h"
50 #include "iwl-core.h"
51 #include "iwl-io.h"
52 #include "iwl-helpers.h"
53 #include "iwl-sta.h"
54 #include "iwl-calib.h"
55
56 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
57 struct iwl4965_tx_queue *txq);
58
59 /******************************************************************************
60 *
61 * module boiler plate
62 *
63 ******************************************************************************/
64
65 /*
66 * module name, copyright, version, etc.
67 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
68 */
69
70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
71
72 #ifdef CONFIG_IWLWIFI_DEBUG
73 #define VD "d"
74 #else
75 #define VD
76 #endif
77
78 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
79 #define VS "s"
80 #else
81 #define VS
82 #endif
83
84 #define DRV_VERSION IWLWIFI_VERSION VD VS
85
86
87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
88 MODULE_VERSION(DRV_VERSION);
89 MODULE_AUTHOR(DRV_COPYRIGHT);
90 MODULE_LICENSE("GPL");
91
92 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
93 {
94 u16 fc = le16_to_cpu(hdr->frame_control);
95 int hdr_len = ieee80211_get_hdrlen(fc);
96
97 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
98 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
99 return NULL;
100 }
101
102 static const struct ieee80211_supported_band *iwl4965_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->cfg->mod_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 static int iwl4965_send_bt_config(struct iwl_priv *priv)
883 {
884 struct iwl4965_bt_cmd bt_cmd = {
885 .flags = 3,
886 .lead_time = 0xAA,
887 .max_kill = 1,
888 .kill_ack_mask = 0,
889 .kill_cts_mask = 0,
890 };
891
892 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
893 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
894 }
895
896 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
897 {
898 int rc = 0;
899 struct iwl4965_rx_packet *res;
900 struct iwl_host_cmd cmd = {
901 .id = REPLY_SCAN_ABORT_CMD,
902 .meta.flags = CMD_WANT_SKB,
903 };
904
905 /* If there isn't a scan actively going on in the hardware
906 * then we are in between scan bands and not actually
907 * actively scanning, so don't send the abort command */
908 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
909 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
910 return 0;
911 }
912
913 rc = iwl_send_cmd_sync(priv, &cmd);
914 if (rc) {
915 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
916 return rc;
917 }
918
919 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
920 if (res->u.status != CAN_ABORT_STATUS) {
921 /* The scan abort will return 1 for success or
922 * 2 for "failure". A failure condition can be
923 * due to simply not being in an active scan which
924 * can occur if we send the scan abort before we
925 * the microcode has notified us that a scan is
926 * completed. */
927 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
928 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
929 clear_bit(STATUS_SCAN_HW, &priv->status);
930 }
931
932 dev_kfree_skb_any(cmd.meta.u.skb);
933
934 return rc;
935 }
936
937 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
938 struct iwl_cmd *cmd,
939 struct sk_buff *skb)
940 {
941 return 1;
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 if (meta_flag & CMD_ASYNC)
964 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
965
966 return iwl_send_cmd(priv, &cmd);
967 }
968
969 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
970 struct iwl_cmd *cmd, struct sk_buff *skb)
971 {
972 struct iwl4965_rx_packet *res = NULL;
973
974 if (!skb) {
975 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
976 return 1;
977 }
978
979 res = (struct iwl4965_rx_packet *)skb->data;
980 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
981 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
982 res->hdr.flags);
983 return 1;
984 }
985
986 switch (res->u.add_sta.status) {
987 case ADD_STA_SUCCESS_MSK:
988 break;
989 default:
990 break;
991 }
992
993 /* We didn't cache the SKB; let the caller free it */
994 return 1;
995 }
996
997 int iwl4965_send_add_station(struct iwl_priv *priv,
998 struct iwl4965_addsta_cmd *sta, u8 flags)
999 {
1000 struct iwl4965_rx_packet *res = NULL;
1001 int rc = 0;
1002 struct iwl_host_cmd cmd = {
1003 .id = REPLY_ADD_STA,
1004 .len = sizeof(struct iwl4965_addsta_cmd),
1005 .meta.flags = flags,
1006 .data = sta,
1007 };
1008
1009 if (flags & CMD_ASYNC)
1010 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1011 else
1012 cmd.meta.flags |= CMD_WANT_SKB;
1013
1014 rc = iwl_send_cmd(priv, &cmd);
1015
1016 if (rc || (flags & CMD_ASYNC))
1017 return rc;
1018
1019 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1020 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1021 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1022 res->hdr.flags);
1023 rc = -EIO;
1024 }
1025
1026 if (rc == 0) {
1027 switch (res->u.add_sta.status) {
1028 case ADD_STA_SUCCESS_MSK:
1029 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1030 break;
1031 default:
1032 rc = -EIO;
1033 IWL_WARNING("REPLY_ADD_STA failed\n");
1034 break;
1035 }
1036 }
1037
1038 priv->alloc_rxb_skb--;
1039 dev_kfree_skb_any(cmd.meta.u.skb);
1040
1041 return rc;
1042 }
1043
1044 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1045 {
1046 struct list_head *element;
1047
1048 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1049 priv->frames_count);
1050
1051 while (!list_empty(&priv->free_frames)) {
1052 element = priv->free_frames.next;
1053 list_del(element);
1054 kfree(list_entry(element, struct iwl4965_frame, list));
1055 priv->frames_count--;
1056 }
1057
1058 if (priv->frames_count) {
1059 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1060 priv->frames_count);
1061 priv->frames_count = 0;
1062 }
1063 }
1064
1065 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1066 {
1067 struct iwl4965_frame *frame;
1068 struct list_head *element;
1069 if (list_empty(&priv->free_frames)) {
1070 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1071 if (!frame) {
1072 IWL_ERROR("Could not allocate frame!\n");
1073 return NULL;
1074 }
1075
1076 priv->frames_count++;
1077 return frame;
1078 }
1079
1080 element = priv->free_frames.next;
1081 list_del(element);
1082 return list_entry(element, struct iwl4965_frame, list);
1083 }
1084
1085 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1086 {
1087 memset(frame, 0, sizeof(*frame));
1088 list_add(&frame->list, &priv->free_frames);
1089 }
1090
1091 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1092 struct ieee80211_hdr *hdr,
1093 const u8 *dest, int left)
1094 {
1095
1096 if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1097 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1098 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1099 return 0;
1100
1101 if (priv->ibss_beacon->len > left)
1102 return 0;
1103
1104 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1105
1106 return priv->ibss_beacon->len;
1107 }
1108
1109 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1110 {
1111 u8 i;
1112
1113 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1114 i = iwl4965_rates[i].next_ieee) {
1115 if (rate_mask & (1 << i))
1116 return iwl4965_rates[i].plcp;
1117 }
1118
1119 return IWL_RATE_INVALID;
1120 }
1121
1122 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1123 {
1124 struct iwl4965_frame *frame;
1125 unsigned int frame_size;
1126 int rc;
1127 u8 rate;
1128
1129 frame = iwl4965_get_free_frame(priv);
1130
1131 if (!frame) {
1132 IWL_ERROR("Could not obtain free frame buffer for beacon "
1133 "command.\n");
1134 return -ENOMEM;
1135 }
1136
1137 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1138 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1139 0xFF0);
1140 if (rate == IWL_INVALID_RATE)
1141 rate = IWL_RATE_6M_PLCP;
1142 } else {
1143 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1144 if (rate == IWL_INVALID_RATE)
1145 rate = IWL_RATE_1M_PLCP;
1146 }
1147
1148 frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1149
1150 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1151 &frame->u.cmd[0]);
1152
1153 iwl4965_free_frame(priv, frame);
1154
1155 return rc;
1156 }
1157
1158 /******************************************************************************
1159 *
1160 * Misc. internal state and helper functions
1161 *
1162 ******************************************************************************/
1163
1164 static void iwl4965_unset_hw_params(struct iwl_priv *priv)
1165 {
1166 if (priv->shared_virt)
1167 pci_free_consistent(priv->pci_dev,
1168 sizeof(struct iwl4965_shared),
1169 priv->shared_virt,
1170 priv->shared_phys);
1171 }
1172
1173 /**
1174 * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1175 *
1176 * return : set the bit for each supported rate insert in ie
1177 */
1178 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1179 u16 basic_rate, int *left)
1180 {
1181 u16 ret_rates = 0, bit;
1182 int i;
1183 u8 *cnt = ie;
1184 u8 *rates = ie + 1;
1185
1186 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1187 if (bit & supported_rate) {
1188 ret_rates |= bit;
1189 rates[*cnt] = iwl4965_rates[i].ieee |
1190 ((bit & basic_rate) ? 0x80 : 0x00);
1191 (*cnt)++;
1192 (*left)--;
1193 if ((*left <= 0) ||
1194 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1195 break;
1196 }
1197 }
1198
1199 return ret_rates;
1200 }
1201
1202 /**
1203 * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1204 */
1205 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1206 enum ieee80211_band band,
1207 struct ieee80211_mgmt *frame,
1208 int left, int is_direct)
1209 {
1210 int len = 0;
1211 u8 *pos = NULL;
1212 u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1213 #ifdef CONFIG_IWL4965_HT
1214 const struct ieee80211_supported_band *sband =
1215 iwl4965_get_hw_mode(priv, band);
1216 #endif /* CONFIG_IWL4965_HT */
1217
1218 /* Make sure there is enough space for the probe request,
1219 * two mandatory IEs and the data */
1220 left -= 24;
1221 if (left < 0)
1222 return 0;
1223 len += 24;
1224
1225 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1226 memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1227 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1228 memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1229 frame->seq_ctrl = 0;
1230
1231 /* fill in our indirect SSID IE */
1232 /* ...next IE... */
1233
1234 left -= 2;
1235 if (left < 0)
1236 return 0;
1237 len += 2;
1238 pos = &(frame->u.probe_req.variable[0]);
1239 *pos++ = WLAN_EID_SSID;
1240 *pos++ = 0;
1241
1242 /* fill in our direct SSID IE... */
1243 if (is_direct) {
1244 /* ...next IE... */
1245 left -= 2 + priv->essid_len;
1246 if (left < 0)
1247 return 0;
1248 /* ... fill it in... */
1249 *pos++ = WLAN_EID_SSID;
1250 *pos++ = priv->essid_len;
1251 memcpy(pos, priv->essid, priv->essid_len);
1252 pos += priv->essid_len;
1253 len += 2 + priv->essid_len;
1254 }
1255
1256 /* fill in supported rate */
1257 /* ...next IE... */
1258 left -= 2;
1259 if (left < 0)
1260 return 0;
1261
1262 /* ... fill it in... */
1263 *pos++ = WLAN_EID_SUPP_RATES;
1264 *pos = 0;
1265
1266 /* exclude 60M rate */
1267 active_rates = priv->rates_mask;
1268 active_rates &= ~IWL_RATE_60M_MASK;
1269
1270 active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1271
1272 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1273 ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1274 active_rate_basic, &left);
1275 active_rates &= ~ret_rates;
1276
1277 ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1278 active_rate_basic, &left);
1279 active_rates &= ~ret_rates;
1280
1281 len += 2 + *pos;
1282 pos += (*pos) + 1;
1283 if (active_rates == 0)
1284 goto fill_end;
1285
1286 /* fill in supported extended rate */
1287 /* ...next IE... */
1288 left -= 2;
1289 if (left < 0)
1290 return 0;
1291 /* ... fill it in... */
1292 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1293 *pos = 0;
1294 iwl4965_supported_rate_to_ie(pos, active_rates,
1295 active_rate_basic, &left);
1296 if (*pos > 0)
1297 len += 2 + *pos;
1298
1299 #ifdef CONFIG_IWL4965_HT
1300 if (sband && sband->ht_info.ht_supported) {
1301 struct ieee80211_ht_cap *ht_cap;
1302 pos += (*pos) + 1;
1303 *pos++ = WLAN_EID_HT_CAPABILITY;
1304 *pos++ = sizeof(struct ieee80211_ht_cap);
1305 ht_cap = (struct ieee80211_ht_cap *)pos;
1306 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1307 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1308 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1309 IEEE80211_HT_CAP_AMPDU_FACTOR) |
1310 ((sband->ht_info.ampdu_density << 2) &
1311 IEEE80211_HT_CAP_AMPDU_DENSITY);
1312 len += 2 + sizeof(struct ieee80211_ht_cap);
1313 }
1314 #endif /*CONFIG_IWL4965_HT */
1315
1316 fill_end:
1317 return (u16)len;
1318 }
1319
1320 /*
1321 * QoS support
1322 */
1323 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1324 struct iwl4965_qosparam_cmd *qos)
1325 {
1326
1327 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1328 sizeof(struct iwl4965_qosparam_cmd), qos);
1329 }
1330
1331 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1332 {
1333 unsigned long flags;
1334
1335 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1336 return;
1337
1338 if (!priv->qos_data.qos_enable)
1339 return;
1340
1341 spin_lock_irqsave(&priv->lock, flags);
1342 priv->qos_data.def_qos_parm.qos_flags = 0;
1343
1344 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1345 !priv->qos_data.qos_cap.q_AP.txop_request)
1346 priv->qos_data.def_qos_parm.qos_flags |=
1347 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1348 if (priv->qos_data.qos_active)
1349 priv->qos_data.def_qos_parm.qos_flags |=
1350 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1351
1352 #ifdef CONFIG_IWL4965_HT
1353 if (priv->current_ht_config.is_ht)
1354 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1355 #endif /* CONFIG_IWL4965_HT */
1356
1357 spin_unlock_irqrestore(&priv->lock, flags);
1358
1359 if (force || iwl_is_associated(priv)) {
1360 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1361 priv->qos_data.qos_active,
1362 priv->qos_data.def_qos_parm.qos_flags);
1363
1364 iwl4965_send_qos_params_command(priv,
1365 &(priv->qos_data.def_qos_parm));
1366 }
1367 }
1368
1369 /*
1370 * Power management (not Tx power!) functions
1371 */
1372 #define MSEC_TO_USEC 1024
1373
1374 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1375 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1376 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1377 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1378 __constant_cpu_to_le32(X1), \
1379 __constant_cpu_to_le32(X2), \
1380 __constant_cpu_to_le32(X3), \
1381 __constant_cpu_to_le32(X4)}
1382
1383
1384 /* default power management (not Tx power) table values */
1385 /* for tim 0-10 */
1386 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1387 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1388 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1389 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1390 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1391 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1392 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1393 };
1394
1395 /* for tim > 10 */
1396 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1397 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1398 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1399 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1400 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1401 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1402 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1403 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1404 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1405 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1406 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1407 };
1408
1409 int iwl4965_power_init_handle(struct iwl_priv *priv)
1410 {
1411 int rc = 0, i;
1412 struct iwl4965_power_mgr *pow_data;
1413 int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1414 u16 pci_pm;
1415
1416 IWL_DEBUG_POWER("Initialize power \n");
1417
1418 pow_data = &(priv->power_data);
1419
1420 memset(pow_data, 0, sizeof(*pow_data));
1421
1422 pow_data->active_index = IWL_POWER_RANGE_0;
1423 pow_data->dtim_val = 0xffff;
1424
1425 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1426 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1427
1428 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1429 if (rc != 0)
1430 return 0;
1431 else {
1432 struct iwl4965_powertable_cmd *cmd;
1433
1434 IWL_DEBUG_POWER("adjust power command flags\n");
1435
1436 for (i = 0; i < IWL_POWER_AC; i++) {
1437 cmd = &pow_data->pwr_range_0[i].cmd;
1438
1439 if (pci_pm & 0x1)
1440 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1441 else
1442 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1443 }
1444 }
1445 return rc;
1446 }
1447
1448 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1449 struct iwl4965_powertable_cmd *cmd, u32 mode)
1450 {
1451 int rc = 0, i;
1452 u8 skip;
1453 u32 max_sleep = 0;
1454 struct iwl4965_power_vec_entry *range;
1455 u8 period = 0;
1456 struct iwl4965_power_mgr *pow_data;
1457
1458 if (mode > IWL_POWER_INDEX_5) {
1459 IWL_DEBUG_POWER("Error invalid power mode \n");
1460 return -1;
1461 }
1462 pow_data = &(priv->power_data);
1463
1464 if (pow_data->active_index == IWL_POWER_RANGE_0)
1465 range = &pow_data->pwr_range_0[0];
1466 else
1467 range = &pow_data->pwr_range_1[1];
1468
1469 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1470
1471 #ifdef IWL_MAC80211_DISABLE
1472 if (priv->assoc_network != NULL) {
1473 unsigned long flags;
1474
1475 period = priv->assoc_network->tim.tim_period;
1476 }
1477 #endif /*IWL_MAC80211_DISABLE */
1478 skip = range[mode].no_dtim;
1479
1480 if (period == 0) {
1481 period = 1;
1482 skip = 0;
1483 }
1484
1485 if (skip == 0) {
1486 max_sleep = period;
1487 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1488 } else {
1489 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1490 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1491 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1492 }
1493
1494 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1495 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1496 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1497 }
1498
1499 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1500 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1501 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1502 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1503 le32_to_cpu(cmd->sleep_interval[0]),
1504 le32_to_cpu(cmd->sleep_interval[1]),
1505 le32_to_cpu(cmd->sleep_interval[2]),
1506 le32_to_cpu(cmd->sleep_interval[3]),
1507 le32_to_cpu(cmd->sleep_interval[4]));
1508
1509 return rc;
1510 }
1511
1512 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1513 {
1514 u32 uninitialized_var(final_mode);
1515 int rc;
1516 struct iwl4965_powertable_cmd cmd;
1517
1518 /* If on battery, set to 3,
1519 * if plugged into AC power, set to CAM ("continuously aware mode"),
1520 * else user level */
1521 switch (mode) {
1522 case IWL_POWER_BATTERY:
1523 final_mode = IWL_POWER_INDEX_3;
1524 break;
1525 case IWL_POWER_AC:
1526 final_mode = IWL_POWER_MODE_CAM;
1527 break;
1528 default:
1529 final_mode = mode;
1530 break;
1531 }
1532
1533 cmd.keep_alive_beacons = 0;
1534
1535 iwl4965_update_power_cmd(priv, &cmd, final_mode);
1536
1537 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1538
1539 if (final_mode == IWL_POWER_MODE_CAM)
1540 clear_bit(STATUS_POWER_PMI, &priv->status);
1541 else
1542 set_bit(STATUS_POWER_PMI, &priv->status);
1543
1544 return rc;
1545 }
1546
1547 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1548 {
1549 /* Filter incoming packets to determine if they are targeted toward
1550 * this network, discarding packets coming from ourselves */
1551 switch (priv->iw_mode) {
1552 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
1553 /* packets from our adapter are dropped (echo) */
1554 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1555 return 0;
1556 /* {broad,multi}cast packets to our IBSS go through */
1557 if (is_multicast_ether_addr(header->addr1))
1558 return !compare_ether_addr(header->addr3, priv->bssid);
1559 /* packets to our adapter go through */
1560 return !compare_ether_addr(header->addr1, priv->mac_addr);
1561 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1562 /* packets from our adapter are dropped (echo) */
1563 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1564 return 0;
1565 /* {broad,multi}cast packets to our BSS go through */
1566 if (is_multicast_ether_addr(header->addr1))
1567 return !compare_ether_addr(header->addr2, priv->bssid);
1568 /* packets to our adapter go through */
1569 return !compare_ether_addr(header->addr1, priv->mac_addr);
1570 default:
1571 break;
1572 }
1573
1574 return 1;
1575 }
1576
1577 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1578
1579 static const char *iwl4965_get_tx_fail_reason(u32 status)
1580 {
1581 switch (status & TX_STATUS_MSK) {
1582 case TX_STATUS_SUCCESS:
1583 return "SUCCESS";
1584 TX_STATUS_ENTRY(SHORT_LIMIT);
1585 TX_STATUS_ENTRY(LONG_LIMIT);
1586 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1587 TX_STATUS_ENTRY(MGMNT_ABORT);
1588 TX_STATUS_ENTRY(NEXT_FRAG);
1589 TX_STATUS_ENTRY(LIFE_EXPIRE);
1590 TX_STATUS_ENTRY(DEST_PS);
1591 TX_STATUS_ENTRY(ABORTED);
1592 TX_STATUS_ENTRY(BT_RETRY);
1593 TX_STATUS_ENTRY(STA_INVALID);
1594 TX_STATUS_ENTRY(FRAG_DROPPED);
1595 TX_STATUS_ENTRY(TID_DISABLE);
1596 TX_STATUS_ENTRY(FRAME_FLUSHED);
1597 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1598 TX_STATUS_ENTRY(TX_LOCKED);
1599 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1600 }
1601
1602 return "UNKNOWN";
1603 }
1604
1605 /**
1606 * iwl4965_scan_cancel - Cancel any currently executing HW scan
1607 *
1608 * NOTE: priv->mutex is not required before calling this function
1609 */
1610 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1611 {
1612 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1613 clear_bit(STATUS_SCANNING, &priv->status);
1614 return 0;
1615 }
1616
1617 if (test_bit(STATUS_SCANNING, &priv->status)) {
1618 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1619 IWL_DEBUG_SCAN("Queuing scan abort.\n");
1620 set_bit(STATUS_SCAN_ABORTING, &priv->status);
1621 queue_work(priv->workqueue, &priv->abort_scan);
1622
1623 } else
1624 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1625
1626 return test_bit(STATUS_SCANNING, &priv->status);
1627 }
1628
1629 return 0;
1630 }
1631
1632 /**
1633 * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1634 * @ms: amount of time to wait (in milliseconds) for scan to abort
1635 *
1636 * NOTE: priv->mutex must be held before calling this function
1637 */
1638 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1639 {
1640 unsigned long now = jiffies;
1641 int ret;
1642
1643 ret = iwl4965_scan_cancel(priv);
1644 if (ret && ms) {
1645 mutex_unlock(&priv->mutex);
1646 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1647 test_bit(STATUS_SCANNING, &priv->status))
1648 msleep(1);
1649 mutex_lock(&priv->mutex);
1650
1651 return test_bit(STATUS_SCANNING, &priv->status);
1652 }
1653
1654 return ret;
1655 }
1656
1657 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1658 {
1659 /* Reset ieee stats */
1660
1661 /* We don't reset the net_device_stats (ieee->stats) on
1662 * re-association */
1663
1664 priv->last_seq_num = -1;
1665 priv->last_frag_num = -1;
1666 priv->last_packet_time = 0;
1667
1668 iwl4965_scan_cancel(priv);
1669 }
1670
1671 #define MAX_UCODE_BEACON_INTERVAL 4096
1672 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
1673
1674 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1675 {
1676 u16 new_val = 0;
1677 u16 beacon_factor = 0;
1678
1679 beacon_factor =
1680 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1681 / MAX_UCODE_BEACON_INTERVAL;
1682 new_val = beacon_val / beacon_factor;
1683
1684 return cpu_to_le16(new_val);
1685 }
1686
1687 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1688 {
1689 u64 interval_tm_unit;
1690 u64 tsf, result;
1691 unsigned long flags;
1692 struct ieee80211_conf *conf = NULL;
1693 u16 beacon_int = 0;
1694
1695 conf = ieee80211_get_hw_conf(priv->hw);
1696
1697 spin_lock_irqsave(&priv->lock, flags);
1698 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1699 priv->rxon_timing.timestamp.dw[0] =
1700 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1701
1702 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1703
1704 tsf = priv->timestamp;
1705
1706 beacon_int = priv->beacon_int;
1707 spin_unlock_irqrestore(&priv->lock, flags);
1708
1709 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1710 if (beacon_int == 0) {
1711 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1712 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1713 } else {
1714 priv->rxon_timing.beacon_interval =
1715 cpu_to_le16(beacon_int);
1716 priv->rxon_timing.beacon_interval =
1717 iwl4965_adjust_beacon_interval(
1718 le16_to_cpu(priv->rxon_timing.beacon_interval));
1719 }
1720
1721 priv->rxon_timing.atim_window = 0;
1722 } else {
1723 priv->rxon_timing.beacon_interval =
1724 iwl4965_adjust_beacon_interval(conf->beacon_int);
1725 /* TODO: we need to get atim_window from upper stack
1726 * for now we set to 0 */
1727 priv->rxon_timing.atim_window = 0;
1728 }
1729
1730 interval_tm_unit =
1731 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1732 result = do_div(tsf, interval_tm_unit);
1733 priv->rxon_timing.beacon_init_val =
1734 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1735
1736 IWL_DEBUG_ASSOC
1737 ("beacon interval %d beacon timer %d beacon tim %d\n",
1738 le16_to_cpu(priv->rxon_timing.beacon_interval),
1739 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1740 le16_to_cpu(priv->rxon_timing.atim_window));
1741 }
1742
1743 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1744 {
1745 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1746 IWL_ERROR("APs don't scan.\n");
1747 return 0;
1748 }
1749
1750 if (!iwl_is_ready_rf(priv)) {
1751 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1752 return -EIO;
1753 }
1754
1755 if (test_bit(STATUS_SCANNING, &priv->status)) {
1756 IWL_DEBUG_SCAN("Scan already in progress.\n");
1757 return -EAGAIN;
1758 }
1759
1760 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1761 IWL_DEBUG_SCAN("Scan request while abort pending. "
1762 "Queuing.\n");
1763 return -EAGAIN;
1764 }
1765
1766 IWL_DEBUG_INFO("Starting scan...\n");
1767 priv->scan_bands = 2;
1768 set_bit(STATUS_SCANNING, &priv->status);
1769 priv->scan_start = jiffies;
1770 priv->scan_pass_start = priv->scan_start;
1771
1772 queue_work(priv->workqueue, &priv->request_scan);
1773
1774 return 0;
1775 }
1776
1777
1778 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1779 enum ieee80211_band band)
1780 {
1781 if (band == IEEE80211_BAND_5GHZ) {
1782 priv->staging_rxon.flags &=
1783 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1784 | RXON_FLG_CCK_MSK);
1785 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1786 } else {
1787 /* Copied from iwl4965_post_associate() */
1788 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1789 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1790 else
1791 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1792
1793 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1794 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1795
1796 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1797 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1798 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1799 }
1800 }
1801
1802 /*
1803 * initialize rxon structure with default values from eeprom
1804 */
1805 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1806 {
1807 const struct iwl_channel_info *ch_info;
1808
1809 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1810
1811 switch (priv->iw_mode) {
1812 case IEEE80211_IF_TYPE_AP:
1813 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1814 break;
1815
1816 case IEEE80211_IF_TYPE_STA:
1817 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1818 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1819 break;
1820
1821 case IEEE80211_IF_TYPE_IBSS:
1822 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1823 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1824 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1825 RXON_FILTER_ACCEPT_GRP_MSK;
1826 break;
1827
1828 case IEEE80211_IF_TYPE_MNTR:
1829 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1830 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1831 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1832 break;
1833 default:
1834 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1835 break;
1836 }
1837
1838 #if 0
1839 /* TODO: Figure out when short_preamble would be set and cache from
1840 * that */
1841 if (!hw_to_local(priv->hw)->short_preamble)
1842 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1843 else
1844 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1845 #endif
1846
1847 ch_info = iwl_get_channel_info(priv, priv->band,
1848 le16_to_cpu(priv->staging_rxon.channel));
1849
1850 if (!ch_info)
1851 ch_info = &priv->channel_info[0];
1852
1853 /*
1854 * in some case A channels are all non IBSS
1855 * in this case force B/G channel
1856 */
1857 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1858 !(is_channel_ibss(ch_info)))
1859 ch_info = &priv->channel_info[0];
1860
1861 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1862 priv->band = ch_info->band;
1863
1864 iwl4965_set_flags_for_phymode(priv, priv->band);
1865
1866 priv->staging_rxon.ofdm_basic_rates =
1867 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1868 priv->staging_rxon.cck_basic_rates =
1869 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1870
1871 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1872 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1873 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1874 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1875 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1876 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1877 iwl4965_set_rxon_chain(priv);
1878 }
1879
1880 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1881 {
1882 if (mode == IEEE80211_IF_TYPE_IBSS) {
1883 const struct iwl_channel_info *ch_info;
1884
1885 ch_info = iwl_get_channel_info(priv,
1886 priv->band,
1887 le16_to_cpu(priv->staging_rxon.channel));
1888
1889 if (!ch_info || !is_channel_ibss(ch_info)) {
1890 IWL_ERROR("channel %d not IBSS channel\n",
1891 le16_to_cpu(priv->staging_rxon.channel));
1892 return -EINVAL;
1893 }
1894 }
1895
1896 priv->iw_mode = mode;
1897
1898 iwl4965_connection_init_rx_config(priv);
1899 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1900
1901 iwlcore_clear_stations_table(priv);
1902
1903 /* dont commit rxon if rf-kill is on*/
1904 if (!iwl_is_ready_rf(priv))
1905 return -EAGAIN;
1906
1907 cancel_delayed_work(&priv->scan_check);
1908 if (iwl4965_scan_cancel_timeout(priv, 100)) {
1909 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1910 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1911 return -EAGAIN;
1912 }
1913
1914 iwl4965_commit_rxon(priv);
1915
1916 return 0;
1917 }
1918
1919 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1920 struct ieee80211_tx_control *ctl,
1921 struct iwl_cmd *cmd,
1922 struct sk_buff *skb_frag,
1923 int sta_id)
1924 {
1925 struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1926 struct iwl_wep_key *wepkey;
1927 int keyidx = 0;
1928
1929 BUG_ON(ctl->hw_key->hw_key_idx > 3);
1930
1931 switch (keyinfo->alg) {
1932 case ALG_CCMP:
1933 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1934 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1935 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1936 cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1937 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1938 break;
1939
1940 case ALG_TKIP:
1941 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1942 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1943 IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1944 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1945 break;
1946
1947 case ALG_WEP:
1948 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1949 cmd->cmd.tx.sec_ctl = 0;
1950 if (priv->default_wep_key) {
1951 /* the WEP key was sent as static */
1952 keyidx = ctl->hw_key->hw_key_idx;
1953 memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1954 wepkey->key_size);
1955 if (wepkey->key_size == WEP_KEY_LEN_128)
1956 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1957 } else {
1958 /* the WEP key was sent as dynamic */
1959 keyidx = keyinfo->keyidx;
1960 memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1961 keyinfo->keylen);
1962 if (keyinfo->keylen == WEP_KEY_LEN_128)
1963 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1964 }
1965
1966 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1967 (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1968
1969 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1970 "with key %d\n", keyidx);
1971 break;
1972
1973 default:
1974 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1975 break;
1976 }
1977 }
1978
1979 /*
1980 * handle build REPLY_TX command notification.
1981 */
1982 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1983 struct iwl_cmd *cmd,
1984 struct ieee80211_tx_control *ctrl,
1985 struct ieee80211_hdr *hdr,
1986 int is_unicast, u8 std_id)
1987 {
1988 __le16 *qc;
1989 u16 fc = le16_to_cpu(hdr->frame_control);
1990 __le32 tx_flags = cmd->cmd.tx.tx_flags;
1991
1992 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1993 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1994 tx_flags |= TX_CMD_FLG_ACK_MSK;
1995 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1996 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1997 if (ieee80211_is_probe_response(fc) &&
1998 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1999 tx_flags |= TX_CMD_FLG_TSF_MSK;
2000 } else {
2001 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2002 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2003 }
2004
2005 if (ieee80211_is_back_request(fc))
2006 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2007
2008
2009 cmd->cmd.tx.sta_id = std_id;
2010 if (ieee80211_get_morefrag(hdr))
2011 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2012
2013 qc = ieee80211_get_qos_ctrl(hdr);
2014 if (qc) {
2015 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2016 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2017 } else
2018 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2019
2020 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2021 tx_flags |= TX_CMD_FLG_RTS_MSK;
2022 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2023 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2024 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2025 tx_flags |= TX_CMD_FLG_CTS_MSK;
2026 }
2027
2028 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2029 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2030
2031 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2032 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2033 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2034 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2035 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2036 else
2037 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2038 } else {
2039 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2040 }
2041
2042 cmd->cmd.tx.driver_txop = 0;
2043 cmd->cmd.tx.tx_flags = tx_flags;
2044 cmd->cmd.tx.next_frame_len = 0;
2045 }
2046 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2047 {
2048 /* 0 - mgmt, 1 - cnt, 2 - data */
2049 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2050 priv->tx_stats[idx].cnt++;
2051 priv->tx_stats[idx].bytes += len;
2052 }
2053 /**
2054 * iwl4965_get_sta_id - Find station's index within station table
2055 *
2056 * If new IBSS station, create new entry in station table
2057 */
2058 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2059 struct ieee80211_hdr *hdr)
2060 {
2061 int sta_id;
2062 u16 fc = le16_to_cpu(hdr->frame_control);
2063 DECLARE_MAC_BUF(mac);
2064
2065 /* If this frame is broadcast or management, use broadcast station id */
2066 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2067 is_multicast_ether_addr(hdr->addr1))
2068 return priv->hw_params.bcast_sta_id;
2069
2070 switch (priv->iw_mode) {
2071
2072 /* If we are a client station in a BSS network, use the special
2073 * AP station entry (that's the only station we communicate with) */
2074 case IEEE80211_IF_TYPE_STA:
2075 return IWL_AP_ID;
2076
2077 /* If we are an AP, then find the station, or use BCAST */
2078 case IEEE80211_IF_TYPE_AP:
2079 sta_id = iwl_find_station(priv, hdr->addr1);
2080 if (sta_id != IWL_INVALID_STATION)
2081 return sta_id;
2082 return priv->hw_params.bcast_sta_id;
2083
2084 /* If this frame is going out to an IBSS network, find the station,
2085 * or create a new station table entry */
2086 case IEEE80211_IF_TYPE_IBSS:
2087 sta_id = iwl_find_station(priv, hdr->addr1);
2088 if (sta_id != IWL_INVALID_STATION)
2089 return sta_id;
2090
2091 /* Create new station table entry */
2092 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2093 0, CMD_ASYNC, NULL);
2094
2095 if (sta_id != IWL_INVALID_STATION)
2096 return sta_id;
2097
2098 IWL_DEBUG_DROP("Station %s not in station map. "
2099 "Defaulting to broadcast...\n",
2100 print_mac(mac, hdr->addr1));
2101 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2102 return priv->hw_params.bcast_sta_id;
2103
2104 default:
2105 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2106 return priv->hw_params.bcast_sta_id;
2107 }
2108 }
2109
2110 /*
2111 * start REPLY_TX command process
2112 */
2113 static int iwl4965_tx_skb(struct iwl_priv *priv,
2114 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2115 {
2116 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2117 struct iwl4965_tfd_frame *tfd;
2118 u32 *control_flags;
2119 int txq_id = ctl->queue;
2120 struct iwl4965_tx_queue *txq = NULL;
2121 struct iwl4965_queue *q = NULL;
2122 dma_addr_t phys_addr;
2123 dma_addr_t txcmd_phys;
2124 dma_addr_t scratch_phys;
2125 struct iwl_cmd *out_cmd = NULL;
2126 u16 len, idx, len_org;
2127 u8 id, hdr_len, unicast;
2128 u8 sta_id;
2129 u16 seq_number = 0;
2130 u16 fc;
2131 __le16 *qc;
2132 u8 wait_write_ptr = 0;
2133 unsigned long flags;
2134 int rc;
2135
2136 spin_lock_irqsave(&priv->lock, flags);
2137 if (iwl_is_rfkill(priv)) {
2138 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2139 goto drop_unlock;
2140 }
2141
2142 if (!priv->vif) {
2143 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2144 goto drop_unlock;
2145 }
2146
2147 if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2148 IWL_ERROR("ERROR: No TX rate available.\n");
2149 goto drop_unlock;
2150 }
2151
2152 unicast = !is_multicast_ether_addr(hdr->addr1);
2153 id = 0;
2154
2155 fc = le16_to_cpu(hdr->frame_control);
2156
2157 #ifdef CONFIG_IWLWIFI_DEBUG
2158 if (ieee80211_is_auth(fc))
2159 IWL_DEBUG_TX("Sending AUTH frame\n");
2160 else if (ieee80211_is_assoc_request(fc))
2161 IWL_DEBUG_TX("Sending ASSOC frame\n");
2162 else if (ieee80211_is_reassoc_request(fc))
2163 IWL_DEBUG_TX("Sending REASSOC frame\n");
2164 #endif
2165
2166 /* drop all data frame if we are not associated */
2167 if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2168 (!iwl_is_associated(priv) ||
2169 ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2170 !priv->assoc_station_added)) {
2171 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2172 goto drop_unlock;
2173 }
2174
2175 spin_unlock_irqrestore(&priv->lock, flags);
2176
2177 hdr_len = ieee80211_get_hdrlen(fc);
2178
2179 /* Find (or create) index into station table for destination station */
2180 sta_id = iwl4965_get_sta_id(priv, hdr);
2181 if (sta_id == IWL_INVALID_STATION) {
2182 DECLARE_MAC_BUF(mac);
2183
2184 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2185 print_mac(mac, hdr->addr1));
2186 goto drop;
2187 }
2188
2189 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2190
2191 qc = ieee80211_get_qos_ctrl(hdr);
2192 if (qc) {
2193 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2194 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2195 IEEE80211_SCTL_SEQ;
2196 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2197 (hdr->seq_ctrl &
2198 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2199 seq_number += 0x10;
2200 #ifdef CONFIG_IWL4965_HT
2201 /* aggregation is on for this <sta,tid> */
2202 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2203 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2204 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2205 #endif /* CONFIG_IWL4965_HT */
2206 }
2207
2208 /* Descriptor for chosen Tx queue */
2209 txq = &priv->txq[txq_id];
2210 q = &txq->q;
2211
2212 spin_lock_irqsave(&priv->lock, flags);
2213
2214 /* Set up first empty TFD within this queue's circular TFD buffer */
2215 tfd = &txq->bd[q->write_ptr];
2216 memset(tfd, 0, sizeof(*tfd));
2217 control_flags = (u32 *) tfd;
2218 idx = get_cmd_index(q, q->write_ptr, 0);
2219
2220 /* Set up driver data for this TFD */
2221 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2222 txq->txb[q->write_ptr].skb[0] = skb;
2223 memcpy(&(txq->txb[q->write_ptr].status.control),
2224 ctl, sizeof(struct ieee80211_tx_control));
2225
2226 /* Set up first empty entry in queue's array of Tx/cmd buffers */
2227 out_cmd = &txq->cmd[idx];
2228 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2229 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2230
2231 /*
2232 * Set up the Tx-command (not MAC!) header.
2233 * Store the chosen Tx queue and TFD index within the sequence field;
2234 * after Tx, uCode's Tx response will return this value so driver can
2235 * locate the frame within the tx queue and do post-tx processing.
2236 */
2237 out_cmd->hdr.cmd = REPLY_TX;
2238 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2239 INDEX_TO_SEQ(q->write_ptr)));
2240
2241 /* Copy MAC header from skb into command buffer */
2242 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2243
2244 /*
2245 * Use the first empty entry in this queue's command buffer array
2246 * to contain the Tx command and MAC header concatenated together
2247 * (payload data will be in another buffer).
2248 * Size of this varies, due to varying MAC header length.
2249 * If end is not dword aligned, we'll have 2 extra bytes at the end
2250 * of the MAC header (device reads on dword boundaries).
2251 * We'll tell device about this padding later.
2252 */
2253 len = priv->hw_params.tx_cmd_len +
2254 sizeof(struct iwl_cmd_header) + hdr_len;
2255
2256 len_org = len;
2257 len = (len + 3) & ~3;
2258
2259 if (len_org != len)
2260 len_org = 1;
2261 else
2262 len_org = 0;
2263
2264 /* Physical address of this Tx command's header (not MAC header!),
2265 * within command buffer array. */
2266 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2267 offsetof(struct iwl_cmd, hdr);
2268
2269 /* Add buffer containing Tx command and MAC(!) header to TFD's
2270 * first entry */
2271 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2272
2273 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2274 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2275
2276 /* Set up TFD's 2nd entry to point directly to remainder of skb,
2277 * if any (802.11 null frames have no payload). */
2278 len = skb->len - hdr_len;
2279 if (len) {
2280 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2281 len, PCI_DMA_TODEVICE);
2282 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2283 }
2284
2285 /* Tell 4965 about any 2-byte padding after MAC header */
2286 if (len_org)
2287 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2288
2289 /* Total # bytes to be transmitted */
2290 len = (u16)skb->len;
2291 out_cmd->cmd.tx.len = cpu_to_le16(len);
2292
2293 /* TODO need this for burst mode later on */
2294 iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2295
2296 /* set is_hcca to 0; it probably will never be implemented */
2297 iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2298
2299 iwl_update_tx_stats(priv, fc, len);
2300
2301 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2302 offsetof(struct iwl4965_tx_cmd, scratch);
2303 out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2304 out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2305
2306 if (!ieee80211_get_morefrag(hdr)) {
2307 txq->need_update = 1;
2308 if (qc) {
2309 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2310 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2311 }
2312 } else {
2313 wait_write_ptr = 1;
2314 txq->need_update = 0;
2315 }
2316
2317 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2318 sizeof(out_cmd->cmd.tx));
2319
2320 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2321 ieee80211_get_hdrlen(fc));
2322
2323 /* Set up entry for this TFD in Tx byte-count array */
2324 priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2325
2326 /* Tell device the write index *just past* this latest filled TFD */
2327 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2328 rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2329 spin_unlock_irqrestore(&priv->lock, flags);
2330
2331 if (rc)
2332 return rc;
2333
2334 if ((iwl4965_queue_space(q) < q->high_mark)
2335 && priv->mac80211_registered) {
2336 if (wait_write_ptr) {
2337 spin_lock_irqsave(&priv->lock, flags);
2338 txq->need_update = 1;
2339 iwl4965_tx_queue_update_write_ptr(priv, txq);
2340 spin_unlock_irqrestore(&priv->lock, flags);
2341 }
2342
2343 ieee80211_stop_queue(priv->hw, ctl->queue);
2344 }
2345
2346 return 0;
2347
2348 drop_unlock:
2349 spin_unlock_irqrestore(&priv->lock, flags);
2350 drop:
2351 return -1;
2352 }
2353
2354 static void iwl4965_set_rate(struct iwl_priv *priv)
2355 {
2356 const struct ieee80211_supported_band *hw = NULL;
2357 struct ieee80211_rate *rate;
2358 int i;
2359
2360 hw = iwl4965_get_hw_mode(priv, priv->band);
2361 if (!hw) {
2362 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2363 return;
2364 }
2365
2366 priv->active_rate = 0;
2367 priv->active_rate_basic = 0;
2368
2369 for (i = 0; i < hw->n_bitrates; i++) {
2370 rate = &(hw->bitrates[i]);
2371 if (rate->hw_value < IWL_RATE_COUNT)
2372 priv->active_rate |= (1 << rate->hw_value);
2373 }
2374
2375 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2376 priv->active_rate, priv->active_rate_basic);
2377
2378 /*
2379 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2380 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2381 * OFDM
2382 */
2383 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2384 priv->staging_rxon.cck_basic_rates =
2385 ((priv->active_rate_basic &
2386 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2387 else
2388 priv->staging_rxon.cck_basic_rates =
2389 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2390
2391 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2392 priv->staging_rxon.ofdm_basic_rates =
2393 ((priv->active_rate_basic &
2394 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2395 IWL_FIRST_OFDM_RATE) & 0xFF;
2396 else
2397 priv->staging_rxon.ofdm_basic_rates =
2398 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2399 }
2400
2401 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2402 {
2403 unsigned long flags;
2404
2405 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2406 return;
2407
2408 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2409 disable_radio ? "OFF" : "ON");
2410
2411 if (disable_radio) {
2412 iwl4965_scan_cancel(priv);
2413 /* FIXME: This is a workaround for AP */
2414 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2415 spin_lock_irqsave(&priv->lock, flags);
2416 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2417 CSR_UCODE_SW_BIT_RFKILL);
2418 spin_unlock_irqrestore(&priv->lock, flags);
2419 /* call the host command only if no hw rf-kill set */
2420 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2421 iwl_is_ready(priv))
2422 iwl4965_send_card_state(priv,
2423 CARD_STATE_CMD_DISABLE,
2424 0);
2425 set_bit(STATUS_RF_KILL_SW, &priv->status);
2426
2427 /* make sure mac80211 stop sending Tx frame */
2428 if (priv->mac80211_registered)
2429 ieee80211_stop_queues(priv->hw);
2430 }
2431 return;
2432 }
2433
2434 spin_lock_irqsave(&priv->lock, flags);
2435 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2436
2437 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2438 spin_unlock_irqrestore(&priv->lock, flags);
2439
2440 /* wake up ucode */
2441 msleep(10);
2442
2443 spin_lock_irqsave(&priv->lock, flags);
2444 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2445 if (!iwl_grab_nic_access(priv))
2446 iwl_release_nic_access(priv);
2447 spin_unlock_irqrestore(&priv->lock, flags);
2448
2449 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2450 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2451 "disabled by HW switch\n");
2452 return;
2453 }
2454
2455 queue_work(priv->workqueue, &priv->restart);
2456 return;
2457 }
2458
2459 #define IWL_PACKET_RETRY_TIME HZ
2460
2461 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2462 {
2463 u16 sc = le16_to_cpu(header->seq_ctrl);
2464 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2465 u16 frag = sc & IEEE80211_SCTL_FRAG;
2466 u16 *last_seq, *last_frag;
2467 unsigned long *last_time;
2468
2469 switch (priv->iw_mode) {
2470 case IEEE80211_IF_TYPE_IBSS:{
2471 struct list_head *p;
2472 struct iwl4965_ibss_seq *entry = NULL;
2473 u8 *mac = header->addr2;
2474 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2475
2476 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2477 entry = list_entry(p, struct iwl4965_ibss_seq, list);
2478 if (!compare_ether_addr(entry->mac, mac))
2479 break;
2480 }
2481 if (p == &priv->ibss_mac_hash[index]) {
2482 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2483 if (!entry) {
2484 IWL_ERROR("Cannot malloc new mac entry\n");
2485 return 0;
2486 }
2487 memcpy(entry->mac, mac, ETH_ALEN);
2488 entry->seq_num = seq;
2489 entry->frag_num = frag;
2490 entry->packet_time = jiffies;
2491 list_add(&entry->list, &priv->ibss_mac_hash[index]);
2492 return 0;
2493 }
2494 last_seq = &entry->seq_num;
2495 last_frag = &entry->frag_num;
2496 last_time = &entry->packet_time;
2497 break;
2498 }
2499 case IEEE80211_IF_TYPE_STA:
2500 last_seq = &priv->last_seq_num;
2501 last_frag = &priv->last_frag_num;
2502 last_time = &priv->last_packet_time;
2503 break;
2504 default:
2505 return 0;
2506 }
2507 if ((*last_seq == seq) &&
2508 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2509 if (*last_frag == frag)
2510 goto drop;
2511 if (*last_frag + 1 != frag)
2512 /* out-of-order fragment */
2513 goto drop;
2514 } else
2515 *last_seq = seq;
2516
2517 *last_frag = frag;
2518 *last_time = jiffies;
2519 return 0;
2520
2521 drop:
2522 return 1;
2523 }
2524
2525 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2526
2527 #include "iwl-spectrum.h"
2528
2529 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
2530 #define BEACON_TIME_MASK_HIGH 0xFF000000
2531 #define TIME_UNIT 1024
2532
2533 /*
2534 * extended beacon time format
2535 * time in usec will be changed into a 32-bit value in 8:24 format
2536 * the high 1 byte is the beacon counts
2537 * the lower 3 bytes is the time in usec within one beacon interval
2538 */
2539
2540 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2541 {
2542 u32 quot;
2543 u32 rem;
2544 u32 interval = beacon_interval * 1024;
2545
2546 if (!interval || !usec)
2547 return 0;
2548
2549 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2550 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2551
2552 return (quot << 24) + rem;
2553 }
2554
2555 /* base is usually what we get from ucode with each received frame,
2556 * the same as HW timer counter counting down
2557 */
2558
2559 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2560 {
2561 u32 base_low = base & BEACON_TIME_MASK_LOW;
2562 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2563 u32 interval = beacon_interval * TIME_UNIT;
2564 u32 res = (base & BEACON_TIME_MASK_HIGH) +
2565 (addon & BEACON_TIME_MASK_HIGH);
2566
2567 if (base_low > addon_low)
2568 res += base_low - addon_low;
2569 else if (base_low < addon_low) {
2570 res += interval + base_low - addon_low;
2571 res += (1 << 24);
2572 } else
2573 res += (1 << 24);
2574
2575 return cpu_to_le32(res);
2576 }
2577
2578 static int iwl4965_get_measurement(struct iwl_priv *priv,
2579 struct ieee80211_measurement_params *params,
2580 u8 type)
2581 {
2582 struct iwl4965_spectrum_cmd spectrum;
2583 struct iwl4965_rx_packet *res;
2584 struct iwl_host_cmd cmd = {
2585 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2586 .data = (void *)&spectrum,
2587 .meta.flags = CMD_WANT_SKB,
2588 };
2589 u32 add_time = le64_to_cpu(params->start_time);
2590 int rc;
2591 int spectrum_resp_status;
2592 int duration = le16_to_cpu(params->duration);
2593
2594 if (iwl_is_associated(priv))
2595 add_time =
2596 iwl4965_usecs_to_beacons(
2597 le64_to_cpu(params->start_time) - priv->last_tsf,
2598 le16_to_cpu(priv->rxon_timing.beacon_interval));
2599
2600 memset(&spectrum, 0, sizeof(spectrum));
2601
2602 spectrum.channel_count = cpu_to_le16(1);
2603 spectrum.flags =
2604 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2605 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2606 cmd.len = sizeof(spectrum);
2607 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2608
2609 if (iwl_is_associated(priv))
2610 spectrum.start_time =
2611 iwl4965_add_beacon_time(priv->last_beacon_time,
2612 add_time,
2613 le16_to_cpu(priv->rxon_timing.beacon_interval));
2614 else
2615 spectrum.start_time = 0;
2616
2617 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2618 spectrum.channels[0].channel = params->channel;
2619 spectrum.channels[0].type = type;
2620 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2621 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2622 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2623
2624 rc = iwl_send_cmd_sync(priv, &cmd);
2625 if (rc)
2626 return rc;
2627
2628 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2629 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2630 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2631 rc = -EIO;
2632 }
2633
2634 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2635 switch (spectrum_resp_status) {
2636 case 0: /* Command will be handled */
2637 if (res->u.spectrum.id != 0xff) {
2638 IWL_DEBUG_INFO
2639 ("Replaced existing measurement: %d\n",
2640 res->u.spectrum.id);
2641 priv->measurement_status &= ~MEASUREMENT_READY;
2642 }
2643 priv->measurement_status |= MEASUREMENT_ACTIVE;
2644 rc = 0;
2645 break;
2646
2647 case 1: /* Command will not be handled */
2648 rc = -EAGAIN;
2649 break;
2650 }
2651
2652 dev_kfree_skb_any(cmd.meta.u.skb);
2653
2654 return rc;
2655 }
2656 #endif
2657
2658 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2659 struct iwl4965_tx_info *tx_sta)
2660 {
2661
2662 tx_sta->status.ack_signal = 0;
2663 tx_sta->status.excessive_retries = 0;
2664 tx_sta->status.queue_length = 0;
2665 tx_sta->status.queue_number = 0;
2666
2667 if (in_interrupt())
2668 ieee80211_tx_status_irqsafe(priv->hw,
2669 tx_sta->skb[0], &(tx_sta->status));
2670 else
2671 ieee80211_tx_status(priv->hw,
2672 tx_sta->skb[0], &(tx_sta->status));
2673
2674 tx_sta->skb[0] = NULL;
2675 }
2676
2677 /**
2678 * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2679 *
2680 * When FW advances 'R' index, all entries between old and new 'R' index
2681 * need to be reclaimed. As result, some free space forms. If there is
2682 * enough free space (> low mark), wake the stack that feeds us.
2683 */
2684 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2685 {
2686 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2687 struct iwl4965_queue *q = &txq->q;
2688 int nfreed = 0;
2689
2690 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2691 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2692 "is out of range [0-%d] %d %d.\n", txq_id,
2693 index, q->n_bd, q->write_ptr, q->read_ptr);
2694 return 0;
2695 }
2696
2697 for (index = iwl_queue_inc_wrap(index, q->n_bd);
2698 q->read_ptr != index;
2699 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2700 if (txq_id != IWL_CMD_QUEUE_NUM) {
2701 iwl4965_txstatus_to_ieee(priv,
2702 &(txq->txb[txq->q.read_ptr]));
2703 iwl4965_hw_txq_free_tfd(priv, txq);
2704 } else if (nfreed > 1) {
2705 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2706 q->write_ptr, q->read_ptr);
2707 queue_work(priv->workqueue, &priv->restart);
2708 }
2709 nfreed++;
2710 }
2711
2712 /* if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2713 (txq_id != IWL_CMD_QUEUE_NUM) &&
2714 priv->mac80211_registered)
2715 ieee80211_wake_queue(priv->hw, txq_id); */
2716
2717
2718 return nfreed;
2719 }
2720
2721 static int iwl4965_is_tx_success(u32 status)
2722 {
2723 status &= TX_STATUS_MSK;
2724 return (status == TX_STATUS_SUCCESS)
2725 || (status == TX_STATUS_DIRECT_DONE);
2726 }
2727
2728 /******************************************************************************
2729 *
2730 * Generic RX handler implementations
2731 *
2732 ******************************************************************************/
2733 #ifdef CONFIG_IWL4965_HT
2734
2735 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2736 struct ieee80211_hdr *hdr)
2737 {
2738 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2739 return IWL_AP_ID;
2740 else {
2741 u8 *da = ieee80211_get_DA(hdr);
2742 return iwl_find_station(priv, da);
2743 }
2744 }
2745
2746 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2747 struct iwl_priv *priv, int txq_id, int idx)
2748 {
2749 if (priv->txq[txq_id].txb[idx].skb[0])
2750 return (struct ieee80211_hdr *)priv->txq[txq_id].
2751 txb[idx].skb[0]->data;
2752 return NULL;
2753 }
2754
2755 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2756 {
2757 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2758 tx_resp->frame_count);
2759 return le32_to_cpu(*scd_ssn) & MAX_SN;
2760
2761 }
2762
2763 /**
2764 * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2765 */
2766 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2767 struct iwl4965_ht_agg *agg,
2768 struct iwl4965_tx_resp_agg *tx_resp,
2769 u16 start_idx)
2770 {
2771 u16 status;
2772 struct agg_tx_status *frame_status = &tx_resp->status;
2773 struct ieee80211_tx_status *tx_status = NULL;
2774 struct ieee80211_hdr *hdr = NULL;
2775 int i, sh;
2776 int txq_id, idx;
2777 u16 seq;
2778
2779 if (agg->wait_for_ba)
2780 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2781
2782 agg->frame_count = tx_resp->frame_count;
2783 agg->start_idx = start_idx;
2784 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2785 agg->bitmap = 0;
2786
2787 /* # frames attempted by Tx command */
2788 if (agg->frame_count == 1) {
2789 /* Only one frame was attempted; no block-ack will arrive */
2790 status = le16_to_cpu(frame_status[0].status);
2791 seq = le16_to_cpu(frame_status[0].sequence);
2792 idx = SEQ_TO_INDEX(seq);
2793 txq_id = SEQ_TO_QUEUE(seq);
2794
2795 /* FIXME: code repetition */
2796 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2797 agg->frame_count, agg->start_idx, idx);
2798
2799 tx_status = &(priv->txq[txq_id].txb[idx].status);
2800 tx_status->retry_count = tx_resp->failure_frame;
2801 tx_status->queue_number = status & 0xff;
2802 tx_status->queue_length = tx_resp->failure_rts;
2803 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2804 tx_status->flags = iwl4965_is_tx_success(status)?
2805 IEEE80211_TX_STATUS_ACK : 0;
2806 iwl4965_hwrate_to_tx_control(priv,
2807 le32_to_cpu(tx_resp->rate_n_flags),
2808 &tx_status->control);
2809 /* FIXME: code repetition end */
2810
2811 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2812 status & 0xff, tx_resp->failure_frame);
2813 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2814 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2815
2816 agg->wait_for_ba = 0;
2817 } else {
2818 /* Two or more frames were attempted; expect block-ack */
2819 u64 bitmap = 0;
2820 int start = agg->start_idx;
2821
2822 /* Construct bit-map of pending frames within Tx window */
2823 for (i = 0; i < agg->frame_count; i++) {
2824 u16 sc;
2825 status = le16_to_cpu(frame_status[i].status);
2826 seq = le16_to_cpu(frame_status[i].sequence);
2827 idx = SEQ_TO_INDEX(seq);
2828 txq_id = SEQ_TO_QUEUE(seq);
2829
2830 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2831 AGG_TX_STATE_ABORT_MSK))
2832 continue;
2833
2834 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2835 agg->frame_count, txq_id, idx);
2836
2837 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2838
2839 sc = le16_to_cpu(hdr->seq_ctrl);
2840 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2841 IWL_ERROR("BUG_ON idx doesn't match seq control"
2842 " idx=%d, seq_idx=%d, seq=%d\n",
2843 idx, SEQ_TO_SN(sc),
2844 hdr->seq_ctrl);
2845 return -1;
2846 }
2847
2848 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2849 i, idx, SEQ_TO_SN(sc));
2850
2851 sh = idx - start;
2852 if (sh > 64) {
2853 sh = (start - idx) + 0xff;
2854 bitmap = bitmap << sh;
2855 sh = 0;
2856 start = idx;
2857 } else if (sh < -64)
2858 sh = 0xff - (start - idx);
2859 else if (sh < 0) {
2860 sh = start - idx;
2861 start = idx;
2862 bitmap = bitmap << sh;
2863 sh = 0;
2864 }
2865 bitmap |= (1 << sh);
2866 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2867 start, (u32)(bitmap & 0xFFFFFFFF));
2868 }
2869
2870 agg->bitmap = bitmap;
2871 agg->start_idx = start;
2872 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2873 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2874 agg->frame_count, agg->start_idx,
2875 (unsigned long long)agg->bitmap);
2876
2877 if (bitmap)
2878 agg->wait_for_ba = 1;
2879 }
2880 return 0;
2881 }
2882 #endif
2883
2884 /**
2885 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2886 */
2887 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2888 struct iwl4965_rx_mem_buffer *rxb)
2889 {
2890 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2891 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2892 int txq_id = SEQ_TO_QUEUE(sequence);
2893 int index = SEQ_TO_INDEX(sequence);
2894 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2895 struct ieee80211_tx_status *tx_status;
2896 struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2897 u32 status = le32_to_cpu(tx_resp->status);
2898 #ifdef CONFIG_IWL4965_HT
2899 int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2900 struct ieee80211_hdr *hdr;
2901 __le16 *qc;
2902 #endif
2903
2904 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2905 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2906 "is out of range [0-%d] %d %d\n", txq_id,
2907 index, txq->q.n_bd, txq->q.write_ptr,
2908 txq->q.read_ptr);
2909 return;
2910 }
2911
2912 #ifdef CONFIG_IWL4965_HT
2913 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2914 qc = ieee80211_get_qos_ctrl(hdr);
2915
2916 if (qc)
2917 tid = le16_to_cpu(*qc) & 0xf;
2918
2919 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2920 if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2921 IWL_ERROR("Station not known\n");
2922 return;
2923 }
2924
2925 if (txq->sched_retry) {
2926 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2927 struct iwl4965_ht_agg *agg = NULL;
2928
2929 if (!qc)
2930 return;
2931
2932 agg = &priv->stations[sta_id].tid[tid].agg;
2933
2934 iwl4965_tx_status_reply_tx(priv, agg,
2935 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2936
2937 if ((tx_resp->frame_count == 1) &&
2938 !iwl4965_is_tx_success(status)) {
2939 /* TODO: send BAR */
2940 }
2941
2942 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2943 int freed;
2944 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2945 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2946 "%d index %d\n", scd_ssn , index);
2947 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2948 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2949
2950 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2951 txq_id >= 0 && priv->mac80211_registered &&
2952 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2953 ieee80211_wake_queue(priv->hw, txq_id);
2954
2955 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2956 }
2957 } else {
2958 #endif /* CONFIG_IWL4965_HT */
2959 tx_status = &(txq->txb[txq->q.read_ptr].status);
2960
2961 tx_status->retry_count = tx_resp->failure_frame;
2962 tx_status->queue_number = status;
2963 tx_status->queue_length = tx_resp->bt_kill_count;
2964 tx_status->queue_length |= tx_resp->failure_rts;
2965 tx_status->flags =
2966 iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2967 iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2968 &tx_status->control);
2969
2970 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2971 "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2972 status, le32_to_cpu(tx_resp->rate_n_flags),
2973 tx_resp->failure_frame);
2974
2975 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2976 if (index != -1) {
2977 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2978 #ifdef CONFIG_IWL4965_HT
2979 if (tid != MAX_TID_COUNT)
2980 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2981 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2982 (txq_id >= 0) &&
2983 priv->mac80211_registered)
2984 ieee80211_wake_queue(priv->hw, txq_id);
2985 if (tid != MAX_TID_COUNT)
2986 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2987 #endif
2988 }
2989 #ifdef CONFIG_IWL4965_HT
2990 }
2991 #endif /* CONFIG_IWL4965_HT */
2992
2993 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2994 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
2995 }
2996
2997
2998 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2999 struct iwl4965_rx_mem_buffer *rxb)
3000 {
3001 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3002 struct iwl4965_alive_resp *palive;
3003 struct delayed_work *pwork;
3004
3005 palive = &pkt->u.alive_frame;
3006
3007 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3008 "0x%01X 0x%01X\n",
3009 palive->is_valid, palive->ver_type,
3010 palive->ver_subtype);
3011
3012 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3013 IWL_DEBUG_INFO("Initialization Alive received.\n");
3014 memcpy(&priv->card_alive_init,
3015 &pkt->u.alive_frame,
3016 sizeof(struct iwl4965_init_alive_resp));
3017 pwork = &priv->init_alive_start;
3018 } else {
3019 IWL_DEBUG_INFO("Runtime Alive received.\n");
3020 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3021 sizeof(struct iwl4965_alive_resp));
3022 pwork = &priv->alive_start;
3023 }
3024
3025 /* We delay the ALIVE response by 5ms to
3026 * give the HW RF Kill time to activate... */
3027 if (palive->is_valid == UCODE_VALID_OK)
3028 queue_delayed_work(priv->workqueue, pwork,
3029 msecs_to_jiffies(5));
3030 else
3031 IWL_WARNING("uCode did not respond OK.\n");
3032 }
3033
3034 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3035 struct iwl4965_rx_mem_buffer *rxb)
3036 {
3037 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3038
3039 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3040 return;
3041 }
3042
3043 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3044 struct iwl4965_rx_mem_buffer *rxb)
3045 {
3046 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3047
3048 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3049 "seq 0x%04X ser 0x%08X\n",
3050 le32_to_cpu(pkt->u.err_resp.error_type),
3051 get_cmd_string(pkt->u.err_resp.cmd_id),
3052 pkt->u.err_resp.cmd_id,
3053 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3054 le32_to_cpu(pkt->u.err_resp.error_info));
3055 }
3056
3057 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3058
3059 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3060 {
3061 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3062 struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3063 struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3064 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3065 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3066 rxon->channel = csa->channel;
3067 priv->staging_rxon.channel = csa->channel;
3068 }
3069
3070 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3071 struct iwl4965_rx_mem_buffer *rxb)
3072 {
3073 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3074 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3075 struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3076
3077 if (!report->state) {
3078 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3079 "Spectrum Measure Notification: Start\n");
3080 return;
3081 }
3082
3083 memcpy(&priv->measure_report, report, sizeof(*report));
3084 priv->measurement_status |= MEASUREMENT_READY;
3085 #endif
3086 }
3087
3088 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3089 struct iwl4965_rx_mem_buffer *rxb)
3090 {
3091 #ifdef CONFIG_IWLWIFI_DEBUG
3092 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3093 struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3094 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3095 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3096 #endif
3097 }
3098
3099 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3100 struct iwl4965_rx_mem_buffer *rxb)
3101 {
3102 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3103 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3104 "notification for %s:\n",
3105 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3106 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3107 }
3108
3109 static void iwl4965_bg_beacon_update(struct work_struct *work)
3110 {
3111 struct iwl_priv *priv =
3112 container_of(work, struct iwl_priv, beacon_update);
3113 struct sk_buff *beacon;
3114
3115 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3116 beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3117
3118 if (!beacon) {
3119 IWL_ERROR("update beacon failed\n");
3120 return;
3121 }
3122
3123 mutex_lock(&priv->mutex);
3124 /* new beacon skb is allocated every time; dispose previous.*/
3125 if (priv->ibss_beacon)
3126 dev_kfree_skb(priv->ibss_beacon);
3127
3128 priv->ibss_beacon = beacon;
3129 mutex_unlock(&priv->mutex);
3130
3131 iwl4965_send_beacon_cmd(priv);
3132 }
3133
3134 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3135 struct iwl4965_rx_mem_buffer *rxb)
3136 {
3137 #ifdef CONFIG_IWLWIFI_DEBUG
3138 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3139 struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3140 u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3141
3142 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3143 "tsf %d %d rate %d\n",
3144 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3145 beacon->beacon_notify_hdr.failure_frame,
3146 le32_to_cpu(beacon->ibss_mgr_status),
3147 le32_to_cpu(beacon->high_tsf),
3148 le32_to_cpu(beacon->low_tsf), rate);
3149 #endif
3150
3151 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3152 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3153 queue_work(priv->workqueue, &priv->beacon_update);
3154 }
3155
3156 /* Service response to REPLY_SCAN_CMD (0x80) */
3157 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3158 struct iwl4965_rx_mem_buffer *rxb)
3159 {
3160 #ifdef CONFIG_IWLWIFI_DEBUG
3161 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3162 struct iwl4965_scanreq_notification *notif =
3163 (struct iwl4965_scanreq_notification *)pkt->u.raw;
3164
3165 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3166 #endif
3167 }
3168
3169 /* Service SCAN_START_NOTIFICATION (0x82) */
3170 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3171 struct iwl4965_rx_mem_buffer *rxb)
3172 {
3173 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3174 struct iwl4965_scanstart_notification *notif =
3175 (struct iwl4965_scanstart_notification *)pkt->u.raw;
3176 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3177 IWL_DEBUG_SCAN("Scan start: "
3178 "%d [802.11%s] "
3179 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3180 notif->channel,
3181 notif->band ? "bg" : "a",
3182 notif->tsf_high,
3183 notif->tsf_low, notif->status, notif->beacon_timer);
3184 }
3185
3186 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3187 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3188 struct iwl4965_rx_mem_buffer *rxb)
3189 {
3190 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3191 struct iwl4965_scanresults_notification *notif =
3192 (struct iwl4965_scanresults_notification *)pkt->u.raw;
3193
3194 IWL_DEBUG_SCAN("Scan ch.res: "
3195 "%d [802.11%s] "
3196 "(TSF: 0x%08X:%08X) - %d "
3197 "elapsed=%lu usec (%dms since last)\n",
3198 notif->channel,
3199 notif->band ? "bg" : "a",
3200 le32_to_cpu(notif->tsf_high),
3201 le32_to_cpu(notif->tsf_low),
3202 le32_to_cpu(notif->statistics[0]),
3203 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3204 jiffies_to_msecs(elapsed_jiffies
3205 (priv->last_scan_jiffies, jiffies)));
3206
3207 priv->last_scan_jiffies = jiffies;
3208 priv->next_scan_jiffies = 0;
3209 }
3210
3211 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3212 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3213 struct iwl4965_rx_mem_buffer *rxb)
3214 {
3215 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3216 struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3217
3218 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3219 scan_notif->scanned_channels,
3220 scan_notif->tsf_low,
3221 scan_notif->tsf_high, scan_notif->status);
3222
3223 /* The HW is no longer scanning */
3224 clear_bit(STATUS_SCAN_HW, &priv->status);
3225
3226 /* The scan completion notification came in, so kill that timer... */
3227 cancel_delayed_work(&priv->scan_check);
3228
3229 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3230 (priv->scan_bands == 2) ? "2.4" : "5.2",
3231 jiffies_to_msecs(elapsed_jiffies
3232 (priv->scan_pass_start, jiffies)));
3233
3234 /* Remove this scanned band from the list
3235 * of pending bands to scan */
3236 priv->scan_bands--;
3237
3238 /* If a request to abort was given, or the scan did not succeed
3239 * then we reset the scan state machine and terminate,
3240 * re-queuing another scan if one has been requested */
3241 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3242 IWL_DEBUG_INFO("Aborted scan completed.\n");
3243 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3244 } else {
3245 /* If there are more bands on this scan pass reschedule */
3246 if (priv->scan_bands > 0)
3247 goto reschedule;
3248 }
3249
3250 priv->last_scan_jiffies = jiffies;
3251 priv->next_scan_jiffies = 0;
3252 IWL_DEBUG_INFO("Setting scan to off\n");
3253
3254 clear_bit(STATUS_SCANNING, &priv->status);
3255
3256 IWL_DEBUG_INFO("Scan took %dms\n",
3257 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3258
3259 queue_work(priv->workqueue, &priv->scan_completed);
3260
3261 return;
3262
3263 reschedule:
3264 priv->scan_pass_start = jiffies;
3265 queue_work(priv->workqueue, &priv->request_scan);
3266 }
3267
3268 /* Handle notification from uCode that card's power state is changing
3269 * due to software, hardware, or critical temperature RFKILL */
3270 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3271 struct iwl4965_rx_mem_buffer *rxb)
3272 {
3273 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3274 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3275 unsigned long status = priv->status;
3276
3277 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3278 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3279 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3280
3281 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3282 RF_CARD_DISABLED)) {
3283
3284 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3285 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3286
3287 if (!iwl_grab_nic_access(priv)) {
3288 iwl_write_direct32(
3289 priv, HBUS_TARG_MBX_C,
3290 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3291
3292 iwl_release_nic_access(priv);
3293 }
3294
3295 if (!(flags & RXON_CARD_DISABLED)) {
3296 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3297 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3298 if (!iwl_grab_nic_access(priv)) {
3299 iwl_write_direct32(
3300 priv, HBUS_TARG_MBX_C,
3301 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3302
3303 iwl_release_nic_access(priv);
3304 }
3305 }
3306
3307 if (flags & RF_CARD_DISABLED) {
3308 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3309 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3310 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3311 if (!iwl_grab_nic_access(priv))
3312 iwl_release_nic_access(priv);
3313 }
3314 }
3315
3316 if (flags & HW_CARD_DISABLED)
3317 set_bit(STATUS_RF_KILL_HW, &priv->status);
3318 else
3319 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3320
3321
3322 if (flags & SW_CARD_DISABLED)
3323 set_bit(STATUS_RF_KILL_SW, &priv->status);
3324 else
3325 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3326
3327 if (!(flags & RXON_CARD_DISABLED))
3328 iwl4965_scan_cancel(priv);
3329
3330 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3331 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3332 (test_bit(STATUS_RF_KILL_SW, &status) !=
3333 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3334 queue_work(priv->workqueue, &priv->rf_kill);
3335 else
3336 wake_up_interruptible(&priv->wait_command_queue);
3337 }
3338
3339 /**
3340 * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3341 *
3342 * Setup the RX handlers for each of the reply types sent from the uCode
3343 * to the host.
3344 *
3345 * This function chains into the hardware specific files for them to setup
3346 * any hardware specific handlers as well.
3347 */
3348 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3349 {
3350 priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3351 priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3352 priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3353 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3354 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3355 iwl4965_rx_spectrum_measure_notif;
3356 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3357 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3358 iwl4965_rx_pm_debug_statistics_notif;
3359 priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3360
3361 /*
3362 * The same handler is used for both the REPLY to a discrete
3363 * statistics request from the host as well as for the periodic
3364 * statistics notifications (after received beacons) from the uCode.
3365 */
3366 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3367 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3368
3369 priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3370 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3371 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3372 iwl4965_rx_scan_results_notif;
3373 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3374 iwl4965_rx_scan_complete_notif;
3375 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3376 priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3377
3378 /* Set up hardware specific Rx handlers */
3379 iwl4965_hw_rx_handler_setup(priv);
3380 }
3381
3382 /**
3383 * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3384 * @rxb: Rx buffer to reclaim
3385 *
3386 * If an Rx buffer has an async callback associated with it the callback
3387 * will be executed. The attached skb (if present) will only be freed
3388 * if the callback returns 1
3389 */
3390 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3391 struct iwl4965_rx_mem_buffer *rxb)
3392 {
3393 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3394 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3395 int txq_id = SEQ_TO_QUEUE(sequence);
3396 int index = SEQ_TO_INDEX(sequence);
3397 int huge = sequence & SEQ_HUGE_FRAME;
3398 int cmd_index;
3399 struct iwl_cmd *cmd;
3400
3401 /* If a Tx command is being handled and it isn't in the actual
3402 * command queue then there a command routing bug has been introduced
3403 * in the queue management code. */
3404 if (txq_id != IWL_CMD_QUEUE_NUM)
3405 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3406 txq_id, pkt->hdr.cmd);
3407 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3408
3409 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3410 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3411
3412 /* Input error checking is done when commands are added to queue. */
3413 if (cmd->meta.flags & CMD_WANT_SKB) {
3414 cmd->meta.source->u.skb = rxb->skb;
3415 rxb->skb = NULL;
3416 } else if (cmd->meta.u.callback &&
3417 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3418 rxb->skb = NULL;
3419
3420 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3421
3422 if (!(cmd->meta.flags & CMD_ASYNC)) {
3423 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3424 wake_up_interruptible(&priv->wait_command_queue);
3425 }
3426 }
3427
3428 /************************** RX-FUNCTIONS ****************************/
3429 /*
3430 * Rx theory of operation
3431 *
3432 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3433 * each of which point to Receive Buffers to be filled by 4965. These get
3434 * used not only for Rx frames, but for any command response or notification
3435 * from the 4965. The driver and 4965 manage the Rx buffers by means
3436 * of indexes into the circular buffer.
3437 *
3438 * Rx Queue Indexes
3439 * The host/firmware share two index registers for managing the Rx buffers.
3440 *
3441 * The READ index maps to the first position that the firmware may be writing
3442 * to -- the driver can read up to (but not including) this position and get
3443 * good data.
3444 * The READ index is managed by the firmware once the card is enabled.
3445 *
3446 * The WRITE index maps to the last position the driver has read from -- the
3447 * position preceding WRITE is the last slot the firmware can place a packet.
3448 *
3449 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3450 * WRITE = READ.
3451 *
3452 * During initialization, the host sets up the READ queue position to the first
3453 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3454 *
3455 * When the firmware places a packet in a buffer, it will advance the READ index
3456 * and fire the RX interrupt. The driver can then query the READ index and
3457 * process as many packets as possible, moving the WRITE index forward as it
3458 * resets the Rx queue buffers with new memory.
3459 *
3460 * The management in the driver is as follows:
3461 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3462 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3463 * to replenish the iwl->rxq->rx_free.
3464 * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3465 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3466 * 'processed' and 'read' driver indexes as well)
3467 * + A received packet is processed and handed to the kernel network stack,
3468 * detached from the iwl->rxq. The driver 'processed' index is updated.
3469 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3470 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3471 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3472 * were enough free buffers and RX_STALLED is set it is cleared.
3473 *
3474 *
3475 * Driver sequence:
3476 *
3477 * iwl4965_rx_queue_alloc() Allocates rx_free
3478 * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
3479 * iwl4965_rx_queue_restock
3480 * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3481 * queue, updates firmware pointers, and updates
3482 * the WRITE index. If insufficient rx_free buffers
3483 * are available, schedules iwl4965_rx_replenish
3484 *
3485 * -- enable interrupts --
3486 * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
3487 * READ INDEX, detaching the SKB from the pool.
3488 * Moves the packet buffer from queue to rx_used.
3489 * Calls iwl4965_rx_queue_restock to refill any empty
3490 * slots.
3491 * ...
3492 *
3493 */
3494
3495 /**
3496 * iwl4965_rx_queue_space - Return number of free slots available in queue.
3497 */
3498 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3499 {
3500 int s = q->read - q->write;
3501 if (s <= 0)
3502 s += RX_QUEUE_SIZE;
3503 /* keep some buffer to not confuse full and empty queue */
3504 s -= 2;
3505 if (s < 0)
3506 s = 0;
3507 return s;
3508 }
3509
3510 /**
3511 * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3512 */
3513 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3514 {
3515 u32 reg = 0;
3516 int rc = 0;
3517 unsigned long flags;
3518
3519 spin_lock_irqsave(&q->lock, flags);
3520
3521 if (q->need_update == 0)
3522 goto exit_unlock;
3523
3524 /* If power-saving is in use, make sure device is awake */
3525 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3526 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3527
3528 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3529 iwl_set_bit(priv, CSR_GP_CNTRL,
3530 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3531 goto exit_unlock;
3532 }
3533
3534 rc = iwl_grab_nic_access(priv);
3535 if (rc)
3536 goto exit_unlock;
3537
3538 /* Device expects a multiple of 8 */
3539 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3540 q->write & ~0x7);
3541 iwl_release_nic_access(priv);
3542
3543 /* Else device is assumed to be awake */
3544 } else
3545 /* Device expects a multiple of 8 */
3546 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3547
3548
3549 q->need_update = 0;
3550
3551 exit_unlock:
3552 spin_unlock_irqrestore(&q->lock, flags);
3553 return rc;
3554 }
3555
3556 /**
3557 * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3558 */
3559 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3560 dma_addr_t dma_addr)
3561 {
3562 return cpu_to_le32((u32)(dma_addr >> 8));
3563 }
3564
3565
3566 /**
3567 * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3568 *
3569 * If there are slots in the RX queue that need to be restocked,
3570 * and we have free pre-allocated buffers, fill the ranks as much
3571 * as we can, pulling from rx_free.
3572 *
3573 * This moves the 'write' index forward to catch up with 'processed', and
3574 * also updates the memory address in the firmware to reference the new
3575 * target buffer.
3576 */
3577 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3578 {
3579 struct iwl4965_rx_queue *rxq = &priv->rxq;
3580 struct list_head *element;
3581 struct iwl4965_rx_mem_buffer *rxb;
3582 unsigned long flags;
3583 int write, rc;
3584
3585 spin_lock_irqsave(&rxq->lock, flags);
3586 write = rxq->write & ~0x7;
3587 while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3588 /* Get next free Rx buffer, remove from free list */
3589 element = rxq->rx_free.next;
3590 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3591 list_del(element);
3592
3593 /* Point to Rx buffer via next RBD in circular buffer */
3594 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3595 rxq->queue[rxq->write] = rxb;
3596 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3597 rxq->free_count--;
3598 }
3599 spin_unlock_irqrestore(&rxq->lock, flags);
3600 /* If the pre-allocated buffer pool is dropping low, schedule to
3601 * refill it */
3602 if (rxq->free_count <= RX_LOW_WATERMARK)
3603 queue_work(priv->workqueue, &priv->rx_replenish);
3604
3605
3606 /* If we've added more space for the firmware to place data, tell it.
3607 * Increment device's write pointer in multiples of 8. */
3608 if ((write != (rxq->write & ~0x7))
3609 || (abs(rxq->write - rxq->read) > 7)) {
3610 spin_lock_irqsave(&rxq->lock, flags);
3611 rxq->need_update = 1;
3612 spin_unlock_irqrestore(&rxq->lock, flags);
3613 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3614 if (rc)
3615 return rc;
3616 }
3617
3618 return 0;
3619 }
3620
3621 /**
3622 * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3623 *
3624 * When moving to rx_free an SKB is allocated for the slot.
3625 *
3626 * Also restock the Rx queue via iwl4965_rx_queue_restock.
3627 * This is called as a scheduled work item (except for during initialization)
3628 */
3629 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3630 {
3631 struct iwl4965_rx_queue *rxq = &priv->rxq;
3632 struct list_head *element;
3633 struct iwl4965_rx_mem_buffer *rxb;
3634 unsigned long flags;
3635 spin_lock_irqsave(&rxq->lock, flags);
3636 while (!list_empty(&rxq->rx_used)) {
3637 element = rxq->rx_used.next;
3638 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3639
3640 /* Alloc a new receive buffer */
3641 rxb->skb =
3642 alloc_skb(priv->hw_params.rx_buf_size,
3643 __GFP_NOWARN | GFP_ATOMIC);
3644 if (!rxb->skb) {
3645 if (net_ratelimit())
3646 printk(KERN_CRIT DRV_NAME
3647 ": Can not allocate SKB buffers\n");
3648 /* We don't reschedule replenish work here -- we will
3649 * call the restock method and if it still needs
3650 * more buffers it will schedule replenish */
3651 break;
3652 }
3653 priv->alloc_rxb_skb++;
3654 list_del(element);
3655
3656 /* Get physical address of RB/SKB */
3657 rxb->dma_addr =
3658 pci_map_single(priv->pci_dev, rxb->skb->data,
3659 priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3660 list_add_tail(&rxb->list, &rxq->rx_free);
3661 rxq->free_count++;
3662 }
3663 spin_unlock_irqrestore(&rxq->lock, flags);
3664 }
3665
3666 /*
3667 * this should be called while priv->lock is locked
3668 */
3669 static void __iwl4965_rx_replenish(void *data)
3670 {
3671 struct iwl_priv *priv = data;
3672
3673 iwl4965_rx_allocate(priv);
3674 iwl4965_rx_queue_restock(priv);
3675 }
3676
3677
3678 void iwl4965_rx_replenish(void *data)
3679 {
3680 struct iwl_priv *priv = data;
3681 unsigned long flags;
3682
3683 iwl4965_rx_allocate(priv);
3684
3685 spin_lock_irqsave(&priv->lock, flags);
3686 iwl4965_rx_queue_restock(priv);
3687 spin_unlock_irqrestore(&priv->lock, flags);
3688 }
3689
3690 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3691 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3692 * This free routine walks the list of POOL entries and if SKB is set to
3693 * non NULL it is unmapped and freed
3694 */
3695 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3696 {
3697 int i;
3698 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3699 if (rxq->pool[i].skb != NULL) {
3700 pci_unmap_single(priv->pci_dev,
3701 rxq->pool[i].dma_addr,
3702 priv->hw_params.rx_buf_size,
3703 PCI_DMA_FROMDEVICE);
3704 dev_kfree_skb(rxq->pool[i].skb);
3705 }
3706 }
3707
3708 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3709 rxq->dma_addr);
3710 rxq->bd = NULL;
3711 }
3712
3713 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3714 {
3715 struct iwl4965_rx_queue *rxq = &priv->rxq;
3716 struct pci_dev *dev = priv->pci_dev;
3717 int i;
3718
3719 spin_lock_init(&rxq->lock);
3720 INIT_LIST_HEAD(&rxq->rx_free);
3721 INIT_LIST_HEAD(&rxq->rx_used);
3722
3723 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3724 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3725 if (!rxq->bd)
3726 return -ENOMEM;
3727
3728 /* Fill the rx_used queue with _all_ of the Rx buffers */
3729 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3730 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3731
3732 /* Set us so that we have processed and used all buffers, but have
3733 * not restocked the Rx queue with fresh buffers */
3734 rxq->read = rxq->write = 0;
3735 rxq->free_count = 0;
3736 rxq->need_update = 0;
3737 return 0;
3738 }
3739
3740 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3741 {
3742 unsigned long flags;
3743 int i;
3744 spin_lock_irqsave(&rxq->lock, flags);
3745 INIT_LIST_HEAD(&rxq->rx_free);
3746 INIT_LIST_HEAD(&rxq->rx_used);
3747 /* Fill the rx_used queue with _all_ of the Rx buffers */
3748 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3749 /* In the reset function, these buffers may have been allocated
3750 * to an SKB, so we need to unmap and free potential storage */
3751 if (rxq->pool[i].skb != NULL) {
3752 pci_unmap_single(priv->pci_dev,
3753 rxq->pool[i].dma_addr,
3754 priv->hw_params.rx_buf_size,
3755 PCI_DMA_FROMDEVICE);
3756 priv->alloc_rxb_skb--;
3757 dev_kfree_skb(rxq->pool[i].skb);
3758 rxq->pool[i].skb = NULL;
3759 }
3760 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3761 }
3762
3763 /* Set us so that we have processed and used all buffers, but have
3764 * not restocked the Rx queue with fresh buffers */
3765 rxq->read = rxq->write = 0;
3766 rxq->free_count = 0;
3767 spin_unlock_irqrestore(&rxq->lock, flags);
3768 }
3769
3770 /* Convert linear signal-to-noise ratio into dB */
3771 static u8 ratio2dB[100] = {
3772 /* 0 1 2 3 4 5 6 7 8 9 */
3773 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3774 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3775 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3776 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3777 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3778 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3779 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3780 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3781 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3782 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
3783 };
3784
3785 /* Calculates a relative dB value from a ratio of linear
3786 * (i.e. not dB) signal levels.
3787 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3788 int iwl4965_calc_db_from_ratio(int sig_ratio)
3789 {
3790 /* 1000:1 or higher just report as 60 dB */
3791 if (sig_ratio >= 1000)
3792 return 60;
3793
3794 /* 100:1 or higher, divide by 10 and use table,
3795 * add 20 dB to make up for divide by 10 */
3796 if (sig_ratio >= 100)
3797 return (20 + (int)ratio2dB[sig_ratio/10]);
3798
3799 /* We shouldn't see this */
3800 if (sig_ratio < 1)
3801 return 0;
3802
3803 /* Use table for ratios 1:1 - 99:1 */
3804 return (int)ratio2dB[sig_ratio];
3805 }
3806
3807 #define PERFECT_RSSI (-20) /* dBm */
3808 #define WORST_RSSI (-95) /* dBm */
3809 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3810
3811 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3812 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3813 * about formulas used below. */
3814 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3815 {
3816 int sig_qual;
3817 int degradation = PERFECT_RSSI - rssi_dbm;
3818
3819 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3820 * as indicator; formula is (signal dbm - noise dbm).
3821 * SNR at or above 40 is a great signal (100%).
3822 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3823 * Weakest usable signal is usually 10 - 15 dB SNR. */
3824 if (noise_dbm) {
3825 if (rssi_dbm - noise_dbm >= 40)
3826 return 100;
3827 else if (rssi_dbm < noise_dbm)
3828 return 0;
3829 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3830
3831 /* Else use just the signal level.
3832 * This formula is a least squares fit of data points collected and
3833 * compared with a reference system that had a percentage (%) display
3834 * for signal quality. */
3835 } else
3836 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3837 (15 * RSSI_RANGE + 62 * degradation)) /
3838 (RSSI_RANGE * RSSI_RANGE);
3839
3840 if (sig_qual > 100)
3841 sig_qual = 100;
3842 else if (sig_qual < 1)
3843 sig_qual = 0;
3844
3845 return sig_qual;
3846 }
3847
3848 /**
3849 * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3850 *
3851 * Uses the priv->rx_handlers callback function array to invoke
3852 * the appropriate handlers, including command responses,
3853 * frame-received notifications, and other notifications.
3854 */
3855 static void iwl4965_rx_handle(struct iwl_priv *priv)
3856 {
3857 struct iwl4965_rx_mem_buffer *rxb;
3858 struct iwl4965_rx_packet *pkt;
3859 struct iwl4965_rx_queue *rxq = &priv->rxq;
3860 u32 r, i;
3861 int reclaim;
3862 unsigned long flags;
3863 u8 fill_rx = 0;
3864 u32 count = 8;
3865
3866 /* uCode's read index (stored in shared DRAM) indicates the last Rx
3867 * buffer that the driver may process (last buffer filled by ucode). */
3868 r = iwl4965_hw_get_rx_read(priv);
3869 i = rxq->read;
3870
3871 /* Rx interrupt, but nothing sent from uCode */
3872 if (i == r)
3873 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3874
3875 if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3876 fill_rx = 1;
3877
3878 while (i != r) {
3879 rxb = rxq->queue[i];
3880
3881 /* If an RXB doesn't have a Rx queue slot associated with it,
3882 * then a bug has been introduced in the queue refilling
3883 * routines -- catch it here */
3884 BUG_ON(rxb == NULL);
3885
3886 rxq->queue[i] = NULL;
3887
3888 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3889 priv->hw_params.rx_buf_size,
3890 PCI_DMA_FROMDEVICE);
3891 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3892
3893 /* Reclaim a command buffer only if this packet is a response
3894 * to a (driver-originated) command.
3895 * If the packet (e.g. Rx frame) originated from uCode,
3896 * there is no command buffer to reclaim.
3897 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3898 * but apparently a few don't get set; catch them here. */
3899 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3900 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3901 (pkt->hdr.cmd != REPLY_RX) &&
3902 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3903 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3904 (pkt->hdr.cmd != REPLY_TX);
3905
3906 /* Based on type of command response or notification,
3907 * handle those that need handling via function in
3908 * rx_handlers table. See iwl4965_setup_rx_handlers() */
3909 if (priv->rx_handlers[pkt->hdr.cmd]) {
3910 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3911 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3912 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3913 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3914 } else {
3915 /* No handling needed */
3916 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3917 "r %d i %d No handler needed for %s, 0x%02x\n",
3918 r, i, get_cmd_string(pkt->hdr.cmd),
3919 pkt->hdr.cmd);
3920 }
3921
3922 if (reclaim) {
3923 /* Invoke any callbacks, transfer the skb to caller, and
3924 * fire off the (possibly) blocking iwl_send_cmd()
3925 * as we reclaim the driver command queue */
3926 if (rxb && rxb->skb)
3927 iwl4965_tx_cmd_complete(priv, rxb);
3928 else
3929 IWL_WARNING("Claim null rxb?\n");
3930 }
3931
3932 /* For now we just don't re-use anything. We can tweak this
3933 * later to try and re-use notification packets and SKBs that
3934 * fail to Rx correctly */
3935 if (rxb->skb != NULL) {
3936 priv->alloc_rxb_skb--;
3937 dev_kfree_skb_any(rxb->skb);
3938 rxb->skb = NULL;
3939 }
3940
3941 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3942 priv->hw_params.rx_buf_size,
3943 PCI_DMA_FROMDEVICE);
3944 spin_lock_irqsave(&rxq->lock, flags);
3945 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3946 spin_unlock_irqrestore(&rxq->lock, flags);
3947 i = (i + 1) & RX_QUEUE_MASK;
3948 /* If there are a lot of unused frames,
3949 * restock the Rx queue so ucode wont assert. */
3950 if (fill_rx) {
3951 count++;
3952 if (count >= 8) {
3953 priv->rxq.read = i;
3954 __iwl4965_rx_replenish(priv);
3955 count = 0;
3956 }
3957 }
3958 }
3959
3960 /* Backtrack one entry */
3961 priv->rxq.read = i;
3962 iwl4965_rx_queue_restock(priv);
3963 }
3964
3965 /**
3966 * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3967 */
3968 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3969 struct iwl4965_tx_queue *txq)
3970 {
3971 u32 reg = 0;
3972 int rc = 0;
3973 int txq_id = txq->q.id;
3974
3975 if (txq->need_update == 0)
3976 return rc;
3977
3978 /* if we're trying to save power */
3979 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3980 /* wake up nic if it's powered down ...
3981 * uCode will wake up, and interrupt us again, so next
3982 * time we'll skip this part. */
3983 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3984
3985 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3986 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3987 iwl_set_bit(priv, CSR_GP_CNTRL,
3988 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3989 return rc;
3990 }
3991
3992 /* restore this queue's parameters in nic hardware. */
3993 rc = iwl_grab_nic_access(priv);
3994 if (rc)
3995 return rc;
3996 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3997 txq->q.write_ptr | (txq_id << 8));
3998 iwl_release_nic_access(priv);
3999
4000 /* else not in power-save mode, uCode will never sleep when we're
4001 * trying to tx (during RFKILL, we're not trying to tx). */
4002 } else
4003 iwl_write32(priv, HBUS_TARG_WRPTR,
4004 txq->q.write_ptr | (txq_id << 8));
4005
4006 txq->need_update = 0;
4007
4008 return rc;
4009 }
4010
4011 #ifdef CONFIG_IWLWIFI_DEBUG
4012 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4013 {
4014 DECLARE_MAC_BUF(mac);
4015
4016 IWL_DEBUG_RADIO("RX CONFIG:\n");
4017 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4018 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4019 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4020 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4021 le32_to_cpu(rxon->filter_flags));
4022 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4023 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4024 rxon->ofdm_basic_rates);
4025 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4026 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4027 print_mac(mac, rxon->node_addr));
4028 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4029 print_mac(mac, rxon->bssid_addr));
4030 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4031 }
4032 #endif
4033
4034 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4035 {
4036 IWL_DEBUG_ISR("Enabling interrupts\n");
4037 set_bit(STATUS_INT_ENABLED, &priv->status);
4038 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4039 }
4040
4041 /* call this function to flush any scheduled tasklet */
4042 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
4043 {
4044 /* wait to make sure we flush pedding tasklet*/
4045 synchronize_irq(priv->pci_dev->irq);
4046 tasklet_kill(&priv->irq_tasklet);
4047 }
4048
4049 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4050 {
4051 clear_bit(STATUS_INT_ENABLED, &priv->status);
4052
4053 /* disable interrupts from uCode/NIC to host */
4054 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4055
4056 /* acknowledge/clear/reset any interrupts still pending
4057 * from uCode or flow handler (Rx/Tx DMA) */
4058 iwl_write32(priv, CSR_INT, 0xffffffff);
4059 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4060 IWL_DEBUG_ISR("Disabled interrupts\n");
4061 }
4062
4063 static const char *desc_lookup(int i)
4064 {
4065 switch (i) {
4066 case 1:
4067 return "FAIL";
4068 case 2:
4069 return "BAD_PARAM";
4070 case 3:
4071 return "BAD_CHECKSUM";
4072 case 4:
4073 return "NMI_INTERRUPT";
4074 case 5:
4075 return "SYSASSERT";
4076 case 6:
4077 return "FATAL_ERROR";
4078 }
4079
4080 return "UNKNOWN";
4081 }
4082
4083 #define ERROR_START_OFFSET (1 * sizeof(u32))
4084 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4085
4086 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4087 {
4088 u32 data2, line;
4089 u32 desc, time, count, base, data1;
4090 u32 blink1, blink2, ilink1, ilink2;
4091 int rc;
4092
4093 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4094
4095 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4096 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4097 return;
4098 }
4099
4100 rc = iwl_grab_nic_access(priv);
4101 if (rc) {
4102 IWL_WARNING("Can not read from adapter at this time.\n");
4103 return;
4104 }
4105
4106 count = iwl_read_targ_mem(priv, base);
4107
4108 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4109 IWL_ERROR("Start IWL Error Log Dump:\n");
4110 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4111 }
4112
4113 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4114 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4115 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4116 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4117 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4118 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4119 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4120 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4121 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4122
4123 IWL_ERROR("Desc Time "
4124 "data1 data2 line\n");
4125 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4126 desc_lookup(desc), desc, time, data1, data2, line);
4127 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4128 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4129 ilink1, ilink2);
4130
4131 iwl_release_nic_access(priv);
4132 }
4133
4134 #define EVENT_START_OFFSET (4 * sizeof(u32))
4135
4136 /**
4137 * iwl4965_print_event_log - Dump error event log to syslog
4138 *
4139 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4140 */
4141 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4142 u32 num_events, u32 mode)
4143 {
4144 u32 i;
4145 u32 base; /* SRAM byte address of event log header */
4146 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4147 u32 ptr; /* SRAM byte address of log data */
4148 u32 ev, time, data; /* event log data */
4149
4150 if (num_events == 0)
4151 return;
4152
4153 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4154
4155 if (mode == 0)
4156 event_size = 2 * sizeof(u32);
4157 else
4158 event_size = 3 * sizeof(u32);
4159
4160 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4161
4162 /* "time" is actually "data" for mode 0 (no timestamp).
4163 * place event id # at far right for easier visual parsing. */
4164 for (i = 0; i < num_events; i++) {
4165 ev = iwl_read_targ_mem(priv, ptr);
4166 ptr += sizeof(u32);
4167 time = iwl_read_targ_mem(priv, ptr);
4168 ptr += sizeof(u32);
4169 if (mode == 0)
4170 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4171 else {
4172 data = iwl_read_targ_mem(priv, ptr);
4173 ptr += sizeof(u32);
4174 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4175 }
4176 }
4177 }
4178
4179 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4180 {
4181 int rc;
4182 u32 base; /* SRAM byte address of event log header */
4183 u32 capacity; /* event log capacity in # entries */
4184 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4185 u32 num_wraps; /* # times uCode wrapped to top of log */
4186 u32 next_entry; /* index of next entry to be written by uCode */
4187 u32 size; /* # entries that we'll print */
4188
4189 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4190 if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4191 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4192 return;
4193 }
4194
4195 rc = iwl_grab_nic_access(priv);
4196 if (rc) {
4197 IWL_WARNING("Can not read from adapter at this time.\n");
4198 return;
4199 }
4200
4201 /* event log header */
4202 capacity = iwl_read_targ_mem(priv, base);
4203 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4204 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4205 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4206
4207 size = num_wraps ? capacity : next_entry;
4208
4209 /* bail out if nothing in log */
4210 if (size == 0) {
4211 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4212 iwl_release_nic_access(priv);
4213 return;
4214 }
4215
4216 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4217 size, num_wraps);
4218
4219 /* if uCode has wrapped back to top of log, start at the oldest entry,
4220 * i.e the next one that uCode would fill. */
4221 if (num_wraps)
4222 iwl4965_print_event_log(priv, next_entry,
4223 capacity - next_entry, mode);
4224
4225 /* (then/else) start at top of log */
4226 iwl4965_print_event_log(priv, 0, next_entry, mode);
4227
4228 iwl_release_nic_access(priv);
4229 }
4230
4231 /**
4232 * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4233 */
4234 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4235 {
4236 /* Set the FW error flag -- cleared on iwl4965_down */
4237 set_bit(STATUS_FW_ERROR, &priv->status);
4238
4239 /* Cancel currently queued command. */
4240 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4241
4242 #ifdef CONFIG_IWLWIFI_DEBUG
4243 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4244 iwl4965_dump_nic_error_log(priv);
4245 iwl4965_dump_nic_event_log(priv);
4246 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4247 }
4248 #endif
4249
4250 wake_up_interruptible(&priv->wait_command_queue);
4251
4252 /* Keep the restart process from trying to send host
4253 * commands by clearing the INIT status bit */
4254 clear_bit(STATUS_READY, &priv->status);
4255
4256 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4257 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4258 "Restarting adapter due to uCode error.\n");
4259
4260 if (iwl_is_associated(priv)) {
4261 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4262 sizeof(priv->recovery_rxon));
4263 priv->error_recovering = 1;
4264 }
4265 queue_work(priv->workqueue, &priv->restart);
4266 }
4267 }
4268
4269 static void iwl4965_error_recovery(struct iwl_priv *priv)
4270 {
4271 unsigned long flags;
4272
4273 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4274 sizeof(priv->staging_rxon));
4275 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4276 iwl4965_commit_rxon(priv);
4277
4278 iwl4965_rxon_add_station(priv, priv->bssid, 1);
4279
4280 spin_lock_irqsave(&priv->lock, flags);
4281 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4282 priv->error_recovering = 0;
4283 spin_unlock_irqrestore(&priv->lock, flags);
4284 }
4285
4286 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4287 {
4288 u32 inta, handled = 0;
4289 u32 inta_fh;
4290 unsigned long flags;
4291 #ifdef CONFIG_IWLWIFI_DEBUG
4292 u32 inta_mask;
4293 #endif
4294
4295 spin_lock_irqsave(&priv->lock, flags);
4296
4297 /* Ack/clear/reset pending uCode interrupts.
4298 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4299 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4300 inta = iwl_read32(priv, CSR_INT);
4301 iwl_write32(priv, CSR_INT, inta);
4302
4303 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4304 * Any new interrupts that happen after this, either while we're
4305 * in this tasklet, or later, will show up in next ISR/tasklet. */
4306 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4307 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4308
4309 #ifdef CONFIG_IWLWIFI_DEBUG
4310 if (iwl_debug_level & IWL_DL_ISR) {
4311 /* just for debug */
4312 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4313 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4314 inta, inta_mask, inta_fh);
4315 }
4316 #endif
4317
4318 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4319 * atomic, make sure that inta covers all the interrupts that
4320 * we've discovered, even if FH interrupt came in just after
4321 * reading CSR_INT. */
4322 if (inta_fh & CSR49_FH_INT_RX_MASK)
4323 inta |= CSR_INT_BIT_FH_RX;
4324 if (inta_fh & CSR49_FH_INT_TX_MASK)
4325 inta |= CSR_INT_BIT_FH_TX;
4326
4327 /* Now service all interrupt bits discovered above. */
4328 if (inta & CSR_INT_BIT_HW_ERR) {
4329 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4330
4331 /* Tell the device to stop sending interrupts */
4332 iwl4965_disable_interrupts(priv);
4333
4334 iwl4965_irq_handle_error(priv);
4335
4336 handled |= CSR_INT_BIT_HW_ERR;
4337
4338 spin_unlock_irqrestore(&priv->lock, flags);
4339
4340 return;
4341 }
4342
4343 #ifdef CONFIG_IWLWIFI_DEBUG
4344 if (iwl_debug_level & (IWL_DL_ISR)) {
4345 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4346 if (inta & CSR_INT_BIT_SCD)
4347 IWL_DEBUG_ISR("Scheduler finished to transmit "
4348 "the frame/frames.\n");
4349
4350 /* Alive notification via Rx interrupt will do the real work */
4351 if (inta & CSR_INT_BIT_ALIVE)
4352 IWL_DEBUG_ISR("Alive interrupt\n");
4353 }
4354 #endif
4355 /* Safely ignore these bits for debug checks below */
4356 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4357
4358 /* HW RF KILL switch toggled */
4359 if (inta & CSR_INT_BIT_RF_KILL) {
4360 int hw_rf_kill = 0;
4361 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4362 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4363 hw_rf_kill = 1;
4364
4365 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4366 "RF_KILL bit toggled to %s.\n",
4367 hw_rf_kill ? "disable radio":"enable radio");
4368
4369 /* Queue restart only if RF_KILL switch was set to "kill"
4370 * when we loaded driver, and is now set to "enable".
4371 * After we're Alive, RF_KILL gets handled by
4372 * iwl4965_rx_card_state_notif() */
4373 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4374 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4375 queue_work(priv->workqueue, &priv->restart);
4376 }
4377
4378 handled |= CSR_INT_BIT_RF_KILL;
4379 }
4380
4381 /* Chip got too hot and stopped itself */
4382 if (inta & CSR_INT_BIT_CT_KILL) {
4383 IWL_ERROR("Microcode CT kill error detected.\n");
4384 handled |= CSR_INT_BIT_CT_KILL;
4385 }
4386
4387 /* Error detected by uCode */
4388 if (inta & CSR_INT_BIT_SW_ERR) {
4389 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4390 inta);
4391 iwl4965_irq_handle_error(priv);
4392 handled |= CSR_INT_BIT_SW_ERR;
4393 }
4394
4395 /* uCode wakes up after power-down sleep */
4396 if (inta & CSR_INT_BIT_WAKEUP) {
4397 IWL_DEBUG_ISR("Wakeup interrupt\n");
4398 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4399 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4400 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4401 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4402 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4403 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4404 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4405
4406 handled |= CSR_INT_BIT_WAKEUP;
4407 }
4408
4409 /* All uCode command responses, including Tx command responses,
4410 * Rx "responses" (frame-received notification), and other
4411 * notifications from uCode come through here*/
4412 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4413 iwl4965_rx_handle(priv);
4414 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4415 }
4416
4417 if (inta & CSR_INT_BIT_FH_TX) {
4418 IWL_DEBUG_ISR("Tx interrupt\n");
4419 handled |= CSR_INT_BIT_FH_TX;
4420 }
4421
4422 if (inta & ~handled)
4423 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4424
4425 if (inta & ~CSR_INI_SET_MASK) {
4426 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4427 inta & ~CSR_INI_SET_MASK);
4428 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4429 }
4430
4431 /* Re-enable all interrupts */
4432 /* only Re-enable if diabled by irq */
4433 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4434 iwl4965_enable_interrupts(priv);
4435
4436 #ifdef CONFIG_IWLWIFI_DEBUG
4437 if (iwl_debug_level & (IWL_DL_ISR)) {
4438 inta = iwl_read32(priv, CSR_INT);
4439 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4440 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4441 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4442 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4443 }
4444 #endif
4445 spin_unlock_irqrestore(&priv->lock, flags);
4446 }
4447
4448 static irqreturn_t iwl4965_isr(int irq, void *data)
4449 {
4450 struct iwl_priv *priv = data;
4451 u32 inta, inta_mask;
4452 u32 inta_fh;
4453 if (!priv)
4454 return IRQ_NONE;
4455
4456 spin_lock(&priv->lock);
4457
4458 /* Disable (but don't clear!) interrupts here to avoid
4459 * back-to-back ISRs and sporadic interrupts from our NIC.
4460 * If we have something to service, the tasklet will re-enable ints.
4461 * If we *don't* have something, we'll re-enable before leaving here. */
4462 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4463 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4464
4465 /* Discover which interrupts are active/pending */
4466 inta = iwl_read32(priv, CSR_INT);
4467 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4468
4469 /* Ignore interrupt if there's nothing in NIC to service.
4470 * This may be due to IRQ shared with another device,
4471 * or due to sporadic interrupts thrown from our NIC. */
4472 if (!inta && !inta_fh) {
4473 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4474 goto none;
4475 }
4476
4477 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4478 /* Hardware disappeared. It might have already raised
4479 * an interrupt */
4480 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4481 goto unplugged;
4482 }
4483
4484 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4485 inta, inta_mask, inta_fh);
4486
4487 inta &= ~CSR_INT_BIT_SCD;
4488
4489 /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4490 if (likely(inta || inta_fh))
4491 tasklet_schedule(&priv->irq_tasklet);
4492
4493 unplugged:
4494 spin_unlock(&priv->lock);
4495 return IRQ_HANDLED;
4496
4497 none:
4498 /* re-enable interrupts here since we don't have anything to service. */
4499 /* only Re-enable if diabled by irq */
4500 if (test_bit(STATUS_INT_ENABLED, &priv->status))
4501 iwl4965_enable_interrupts(priv);
4502 spin_unlock(&priv->lock);
4503 return IRQ_NONE;
4504 }
4505
4506 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4507 * sending probe req. This should be set long enough to hear probe responses
4508 * from more than one AP. */
4509 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
4510 #define IWL_ACTIVE_DWELL_TIME_52 (10)
4511
4512 /* For faster active scanning, scan will move to the next channel if fewer than
4513 * PLCP_QUIET_THRESH packets are heard on this channel within
4514 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
4515 * time if it's a quiet channel (nothing responded to our probe, and there's
4516 * no other traffic).
4517 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4518 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
4519 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
4520
4521 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4522 * Must be set longer than active dwell time.
4523 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4524 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
4525 #define IWL_PASSIVE_DWELL_TIME_52 (10)
4526 #define IWL_PASSIVE_DWELL_BASE (100)
4527 #define IWL_CHANNEL_TUNE_TIME 5
4528
4529 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4530 enum ieee80211_band band)
4531 {
4532 if (band == IEEE80211_BAND_5GHZ)
4533 return IWL_ACTIVE_DWELL_TIME_52;
4534 else
4535 return IWL_ACTIVE_DWELL_TIME_24;
4536 }
4537
4538 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4539 enum ieee80211_band band)
4540 {
4541 u16 active = iwl4965_get_active_dwell_time(priv, band);
4542 u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4543 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4544 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4545
4546 if (iwl_is_associated(priv)) {
4547 /* If we're associated, we clamp the maximum passive
4548 * dwell time to be 98% of the beacon interval (minus
4549 * 2 * channel tune time) */
4550 passive = priv->beacon_int;
4551 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4552 passive = IWL_PASSIVE_DWELL_BASE;
4553 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4554 }
4555
4556 if (passive <= active)
4557 passive = active + 1;
4558
4559 return passive;
4560 }
4561
4562 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4563 enum ieee80211_band band,
4564 u8 is_active, u8 direct_mask,
4565 struct iwl4965_scan_channel *scan_ch)
4566 {
4567 const struct ieee80211_channel *channels = NULL;
4568 const struct ieee80211_supported_band *sband;
4569 const struct iwl_channel_info *ch_info;
4570 u16 passive_dwell = 0;
4571 u16 active_dwell = 0;
4572 int added, i;
4573
4574 sband = iwl4965_get_hw_mode(priv, band);
4575 if (!sband)
4576 return 0;
4577
4578 channels = sband->channels;
4579
4580 active_dwell = iwl4965_get_active_dwell_time(priv, band);
4581 passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4582
4583 for (i = 0, added = 0; i < sband->n_channels; i++) {
4584 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4585 continue;
4586
4587 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4588
4589 ch_info = iwl_get_channel_info(priv, band,
4590 scan_ch->channel);
4591 if (!is_channel_valid(ch_info)) {
4592 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4593 scan_ch->channel);
4594 continue;
4595 }
4596
4597 if (!is_active || is_channel_passive(ch_info) ||
4598 (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4599 scan_ch->type = 0; /* passive */
4600 else
4601 scan_ch->type = 1; /* active */
4602
4603 if (scan_ch->type & 1)
4604 scan_ch->type |= (direct_mask << 1);
4605
4606 if (is_channel_narrow(ch_info))
4607 scan_ch->type |= (1 << 7);
4608
4609 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4610 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4611
4612 /* Set txpower levels to defaults */
4613 scan_ch->tpc.dsp_atten = 110;
4614 /* scan_pwr_info->tpc.dsp_atten; */
4615
4616 /*scan_pwr_info->tpc.tx_gain; */
4617 if (band == IEEE80211_BAND_5GHZ)
4618 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4619 else {
4620 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4621 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4622 * power level:
4623 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4624 */
4625 }
4626
4627 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4628 scan_ch->channel,
4629 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4630 (scan_ch->type & 1) ?
4631 active_dwell : passive_dwell);
4632
4633 scan_ch++;
4634 added++;
4635 }
4636
4637 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4638 return added;
4639 }
4640
4641 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4642 struct ieee80211_rate *rates)
4643 {
4644 int i;
4645
4646 for (i = 0; i < IWL_RATE_COUNT; i++) {
4647 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4648 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4649 rates[i].hw_value_short = i;
4650 rates[i].flags = 0;
4651 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4652 /*
4653 * If CCK != 1M then set short preamble rate flag.
4654 */
4655 rates[i].flags |=
4656 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4657 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4658 }
4659 }
4660 }
4661
4662 /**
4663 * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4664 */
4665 int iwl4965_init_geos(struct iwl_priv *priv)
4666 {
4667 struct iwl_channel_info *ch;
4668 struct ieee80211_supported_band *sband;
4669 struct ieee80211_channel *channels;
4670 struct ieee80211_channel *geo_ch;
4671 struct ieee80211_rate *rates;
4672 int i = 0;
4673
4674 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4675 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4676 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4677 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4678 return 0;
4679 }
4680
4681 channels = kzalloc(sizeof(struct ieee80211_channel) *
4682 priv->channel_count, GFP_KERNEL);
4683 if (!channels)
4684 return -ENOMEM;
4685
4686 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4687 GFP_KERNEL);
4688 if (!rates) {
4689 kfree(channels);
4690 return -ENOMEM;
4691 }
4692
4693 /* 5.2GHz channels start after the 2.4GHz channels */
4694 sband = &priv->bands[IEEE80211_BAND_5GHZ];
4695 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4696 /* just OFDM */
4697 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4698 sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4699
4700 iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4701
4702 sband = &priv->bands[IEEE80211_BAND_2GHZ];
4703 sband->channels = channels;
4704 /* OFDM & CCK */
4705 sband->bitrates = rates;
4706 sband->n_bitrates = IWL_RATE_COUNT;
4707
4708 iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4709
4710 priv->ieee_channels = channels;
4711 priv->ieee_rates = rates;
4712
4713 iwl4965_init_hw_rates(priv, rates);
4714
4715 for (i = 0; i < priv->channel_count; i++) {
4716 ch = &priv->channel_info[i];
4717
4718 /* FIXME: might be removed if scan is OK */
4719 if (!is_channel_valid(ch))
4720 continue;
4721
4722 if (is_channel_a_band(ch))
4723 sband = &priv->bands[IEEE80211_BAND_5GHZ];
4724 else
4725 sband = &priv->bands[IEEE80211_BAND_2GHZ];
4726
4727 geo_ch = &sband->channels[sband->n_channels++];
4728
4729 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4730 geo_ch->max_power = ch->max_power_avg;
4731 geo_ch->max_antenna_gain = 0xff;
4732 geo_ch->hw_value = ch->channel;
4733
4734 if (is_channel_valid(ch)) {
4735 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4736 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4737
4738 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4739 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4740
4741 if (ch->flags & EEPROM_CHANNEL_RADAR)
4742 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4743
4744 if (ch->max_power_avg > priv->max_channel_txpower_limit)
4745 priv->max_channel_txpower_limit =
4746 ch->max_power_avg;
4747 } else {
4748 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4749 }
4750
4751 /* Save flags for reg domain usage */
4752 geo_ch->orig_flags = geo_ch->flags;
4753
4754 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4755 ch->channel, geo_ch->center_freq,
4756 is_channel_a_band(ch) ? "5.2" : "2.4",
4757 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4758 "restricted" : "valid",
4759 geo_ch->flags);
4760 }
4761
4762 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4763 priv->cfg->sku & IWL_SKU_A) {
4764 printk(KERN_INFO DRV_NAME
4765 ": Incorrectly detected BG card as ABG. Please send "
4766 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4767 priv->pci_dev->device, priv->pci_dev->subsystem_device);
4768 priv->cfg->sku &= ~IWL_SKU_A;
4769 }
4770
4771 printk(KERN_INFO DRV_NAME
4772 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4773 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4774 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4775
4776 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4777 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4778 &priv->bands[IEEE80211_BAND_2GHZ];
4779 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4780 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4781 &priv->bands[IEEE80211_BAND_5GHZ];
4782
4783 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4784
4785 return 0;
4786 }
4787
4788 /*
4789 * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4790 */
4791 void iwl4965_free_geos(struct iwl_priv *priv)
4792 {
4793 kfree(priv->ieee_channels);
4794 kfree(priv->ieee_rates);
4795 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4796 }
4797
4798 /******************************************************************************
4799 *
4800 * uCode download functions
4801 *
4802 ******************************************************************************/
4803
4804 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4805 {
4806 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4807 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4808 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4809 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4810 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4811 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4812 }
4813
4814 /**
4815 * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4816 * looking at all data.
4817 */
4818 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4819 u32 len)
4820 {
4821 u32 val;
4822 u32 save_len = len;
4823 int rc = 0;
4824 u32 errcnt;
4825
4826 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4827
4828 rc = iwl_grab_nic_access(priv);
4829 if (rc)
4830 return rc;
4831
4832 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4833
4834 errcnt = 0;
4835 for (; len > 0; len -= sizeof(u32), image++) {
4836 /* read data comes through single port, auto-incr addr */
4837 /* NOTE: Use the debugless read so we don't flood kernel log
4838 * if IWL_DL_IO is set */
4839 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4840 if (val != le32_to_cpu(*image)) {
4841 IWL_ERROR("uCode INST section is invalid at "
4842 "offset 0x%x, is 0x%x, s/b 0x%x\n",
4843 save_len - len, val, le32_to_cpu(*image));
4844 rc = -EIO;
4845 errcnt++;
4846 if (errcnt >= 20)
4847 break;
4848 }
4849 }
4850
4851 iwl_release_nic_access(priv);
4852
4853 if (!errcnt)
4854 IWL_DEBUG_INFO
4855 ("ucode image in INSTRUCTION memory is good\n");
4856
4857 return rc;
4858 }
4859
4860
4861 /**
4862 * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4863 * using sample data 100 bytes apart. If these sample points are good,
4864 * it's a pretty good bet that everything between them is good, too.
4865 */
4866 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4867 {
4868 u32 val;
4869 int rc = 0;
4870 u32 errcnt = 0;
4871 u32 i;
4872
4873 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4874
4875 rc = iwl_grab_nic_access(priv);
4876 if (rc)
4877 return rc;
4878
4879 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4880 /* read data comes through single port, auto-incr addr */
4881 /* NOTE: Use the debugless read so we don't flood kernel log
4882 * if IWL_DL_IO is set */
4883 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4884 i + RTC_INST_LOWER_BOUND);
4885 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4886 if (val != le32_to_cpu(*image)) {
4887 #if 0 /* Enable this if you want to see details */
4888 IWL_ERROR("uCode INST section is invalid at "
4889 "offset 0x%x, is 0x%x, s/b 0x%x\n",
4890 i, val, *image);
4891 #endif
4892 rc = -EIO;
4893 errcnt++;
4894 if (errcnt >= 3)
4895 break;
4896 }
4897 }
4898
4899 iwl_release_nic_access(priv);
4900
4901 return rc;
4902 }
4903
4904
4905 /**
4906 * iwl4965_verify_ucode - determine which instruction image is in SRAM,
4907 * and verify its contents
4908 */
4909 static int iwl4965_verify_ucode(struct iwl_priv *priv)
4910 {
4911 __le32 *image;
4912 u32 len;
4913 int rc = 0;
4914
4915 /* Try bootstrap */
4916 image = (__le32 *)priv->ucode_boot.v_addr;
4917 len = priv->ucode_boot.len;
4918 rc = iwl4965_verify_inst_sparse(priv, image, len);
4919 if (rc == 0) {
4920 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4921 return 0;
4922 }
4923
4924 /* Try initialize */
4925 image = (__le32 *)priv->ucode_init.v_addr;
4926 len = priv->ucode_init.len;
4927 rc = iwl4965_verify_inst_sparse(priv, image, len);
4928 if (rc == 0) {
4929 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4930 return 0;
4931 }
4932
4933 /* Try runtime/protocol */
4934 image = (__le32 *)priv->ucode_code.v_addr;
4935 len = priv->ucode_code.len;
4936 rc = iwl4965_verify_inst_sparse(priv, image, len);
4937 if (rc == 0) {
4938 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4939 return 0;
4940 }
4941
4942 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
4943
4944 /* Since nothing seems to match, show first several data entries in
4945 * instruction SRAM, so maybe visual inspection will give a clue.
4946 * Selection of bootstrap image (vs. other images) is arbitrary. */
4947 image = (__le32 *)priv->ucode_boot.v_addr;
4948 len = priv->ucode_boot.len;
4949 rc = iwl4965_verify_inst_full(priv, image, len);
4950
4951 return rc;
4952 }
4953
4954 static void iwl4965_nic_start(struct iwl_priv *priv)
4955 {
4956 /* Remove all resets to allow NIC to operate */
4957 iwl_write32(priv, CSR_RESET, 0);
4958 }
4959
4960
4961 /**
4962 * iwl4965_read_ucode - Read uCode images from disk file.
4963 *
4964 * Copy into buffers for card to fetch via bus-mastering
4965 */
4966 static int iwl4965_read_ucode(struct iwl_priv *priv)
4967 {
4968 struct iwl4965_ucode *ucode;
4969 int ret;
4970 const struct firmware *ucode_raw;
4971 const char *name = priv->cfg->fw_name;
4972 u8 *src;
4973 size_t len;
4974 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4975
4976 /* Ask kernel firmware_class module to get the boot firmware off disk.
4977 * request_firmware() is synchronous, file is in memory on return. */
4978 ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4979 if (ret < 0) {
4980 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4981 name, ret);
4982 goto error;
4983 }
4984
4985 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4986 name, ucode_raw->size);
4987
4988 /* Make sure that we got at least our header! */
4989 if (ucode_raw->size < sizeof(*ucode)) {
4990 IWL_ERROR("File size way too small!\n");
4991 ret = -EINVAL;
4992 goto err_release;
4993 }
4994
4995 /* Data from ucode file: header followed by uCode images */
4996 ucode = (void *)ucode_raw->data;
4997
4998 ver = le32_to_cpu(ucode->ver);
4999 inst_size = le32_to_cpu(ucode->inst_size);
5000 data_size = le32_to_cpu(ucode->data_size);
5001 init_size = le32_to_cpu(ucode->init_size);
5002 init_data_size = le32_to_cpu(ucode->init_data_size);
5003 boot_size = le32_to_cpu(ucode->boot_size);
5004
5005 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5006 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5007 inst_size);
5008 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5009 data_size);
5010 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5011 init_size);
5012 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5013 init_data_size);
5014 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5015 boot_size);
5016
5017 /* Verify size of file vs. image size info in file's header */
5018 if (ucode_raw->size < sizeof(*ucode) +
5019 inst_size + data_size + init_size +
5020 init_data_size + boot_size) {
5021
5022 IWL_DEBUG_INFO("uCode file size %d too small\n",
5023 (int)ucode_raw->size);
5024 ret = -EINVAL;
5025 goto err_release;
5026 }
5027
5028 /* Verify that uCode images will fit in card's SRAM */
5029 if (inst_size > IWL_MAX_INST_SIZE) {
5030 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5031 inst_size);
5032 ret = -EINVAL;
5033 goto err_release;
5034 }
5035
5036 if (data_size > IWL_MAX_DATA_SIZE) {
5037 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5038 data_size);
5039 ret = -EINVAL;
5040 goto err_release;
5041 }
5042 if (init_size > IWL_MAX_INST_SIZE) {
5043 IWL_DEBUG_INFO
5044 ("uCode init instr len %d too large to fit in\n",
5045 init_size);
5046 ret = -EINVAL;
5047 goto err_release;
5048 }
5049 if (init_data_size > IWL_MAX_DATA_SIZE) {
5050 IWL_DEBUG_INFO
5051 ("uCode init data len %d too large to fit in\n",
5052 init_data_size);
5053 ret = -EINVAL;
5054 goto err_release;
5055 }
5056 if (boot_size > IWL_MAX_BSM_SIZE) {
5057 IWL_DEBUG_INFO
5058 ("uCode boot instr len %d too large to fit in\n",
5059 boot_size);
5060 ret = -EINVAL;
5061 goto err_release;
5062 }
5063
5064 /* Allocate ucode buffers for card's bus-master loading ... */
5065
5066 /* Runtime instructions and 2 copies of data:
5067 * 1) unmodified from disk
5068 * 2) backup cache for save/restore during power-downs */
5069 priv->ucode_code.len = inst_size;
5070 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5071
5072 priv->ucode_data.len = data_size;
5073 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5074
5075 priv->ucode_data_backup.len = data_size;
5076 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5077
5078 /* Initialization instructions and data */
5079 if (init_size && init_data_size) {
5080 priv->ucode_init.len = init_size;
5081 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5082
5083 priv->ucode_init_data.len = init_data_size;
5084 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5085
5086 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5087 goto err_pci_alloc;
5088 }
5089
5090 /* Bootstrap (instructions only, no data) */
5091 if (boot_size) {
5092 priv->ucode_boot.len = boot_size;
5093 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5094
5095 if (!priv->ucode_boot.v_addr)
5096 goto err_pci_alloc;
5097 }
5098
5099 /* Copy images into buffers for card's bus-master reads ... */
5100
5101 /* Runtime instructions (first block of data in file) */
5102 src = &ucode->data[0];
5103 len = priv->ucode_code.len;
5104 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5105 memcpy(priv->ucode_code.v_addr, src, len);
5106 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5107 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5108
5109 /* Runtime data (2nd block)
5110 * NOTE: Copy into backup buffer will be done in iwl4965_up() */
5111 src = &ucode->data[inst_size];
5112 len = priv->ucode_data.len;
5113 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5114 memcpy(priv->ucode_data.v_addr, src, len);
5115 memcpy(priv->ucode_data_backup.v_addr, src, len);
5116
5117 /* Initialization instructions (3rd block) */
5118 if (init_size) {
5119 src = &ucode->data[inst_size + data_size];
5120 len = priv->ucode_init.len;
5121 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5122 len);
5123 memcpy(priv->ucode_init.v_addr, src, len);
5124 }
5125
5126 /* Initialization data (4th block) */
5127 if (init_data_size) {
5128 src = &ucode->data[inst_size + data_size + init_size];
5129 len = priv->ucode_init_data.len;
5130 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5131 len);
5132 memcpy(priv->ucode_init_data.v_addr, src, len);
5133 }
5134
5135 /* Bootstrap instructions (5th block) */
5136 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5137 len = priv->ucode_boot.len;
5138 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5139 memcpy(priv->ucode_boot.v_addr, src, len);
5140
5141 /* We have our copies now, allow OS release its copies */
5142 release_firmware(ucode_raw);
5143 return 0;
5144
5145 err_pci_alloc:
5146 IWL_ERROR("failed to allocate pci memory\n");
5147 ret = -ENOMEM;
5148 iwl4965_dealloc_ucode_pci(priv);
5149
5150 err_release:
5151 release_firmware(ucode_raw);
5152
5153 error:
5154 return ret;
5155 }
5156
5157
5158 /**
5159 * iwl4965_set_ucode_ptrs - Set uCode address location
5160 *
5161 * Tell initialization uCode where to find runtime uCode.
5162 *
5163 * BSM registers initially contain pointers to initialization uCode.
5164 * We need to replace them to load runtime uCode inst and data,
5165 * and to save runtime data when powering down.
5166 */
5167 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5168 {
5169 dma_addr_t pinst;
5170 dma_addr_t pdata;
5171 int rc = 0;
5172 unsigned long flags;
5173
5174 /* bits 35:4 for 4965 */
5175 pinst = priv->ucode_code.p_addr >> 4;
5176 pdata = priv->ucode_data_backup.p_addr >> 4;
5177
5178 spin_lock_irqsave(&priv->lock, flags);
5179 rc = iwl_grab_nic_access(priv);
5180 if (rc) {
5181 spin_unlock_irqrestore(&priv->lock, flags);
5182 return rc;
5183 }
5184
5185 /* Tell bootstrap uCode where to find image to load */
5186 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5187 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5188 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5189 priv->ucode_data.len);
5190
5191 /* Inst bytecount must be last to set up, bit 31 signals uCode
5192 * that all new ptr/size info is in place */
5193 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5194 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5195
5196 iwl_release_nic_access(priv);
5197
5198 spin_unlock_irqrestore(&priv->lock, flags);
5199
5200 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5201
5202 return rc;
5203 }
5204
5205 /**
5206 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5207 *
5208 * Called after REPLY_ALIVE notification received from "initialize" uCode.
5209 *
5210 * The 4965 "initialize" ALIVE reply contains calibration data for:
5211 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
5212 * (3945 does not contain this data).
5213 *
5214 * Tell "initialize" uCode to go ahead and load the runtime uCode.
5215 */
5216 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5217 {
5218 /* Check alive response for "valid" sign from uCode */
5219 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5220 /* We had an error bringing up the hardware, so take it
5221 * all the way back down so we can try again */
5222 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5223 goto restart;
5224 }
5225
5226 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5227 * This is a paranoid check, because we would not have gotten the
5228 * "initialize" alive if code weren't properly loaded. */
5229 if (iwl4965_verify_ucode(priv)) {
5230 /* Runtime instruction load was bad;
5231 * take it all the way back down so we can try again */
5232 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5233 goto restart;
5234 }
5235
5236 /* Calculate temperature */
5237 priv->temperature = iwl4965_get_temperature(priv);
5238
5239 /* Send pointers to protocol/runtime uCode image ... init code will
5240 * load and launch runtime uCode, which will send us another "Alive"
5241 * notification. */
5242 IWL_DEBUG_INFO("Initialization Alive received.\n");
5243 if (iwl4965_set_ucode_ptrs(priv)) {
5244 /* Runtime instruction load won't happen;
5245 * take it all the way back down so we can try again */
5246 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5247 goto restart;
5248 }
5249 return;
5250
5251 restart:
5252 queue_work(priv->workqueue, &priv->restart);
5253 }
5254
5255
5256 /**
5257 * iwl4965_alive_start - called after REPLY_ALIVE notification received
5258 * from protocol/runtime uCode (initialization uCode's
5259 * Alive gets handled by iwl4965_init_alive_start()).
5260 */
5261 static void iwl4965_alive_start(struct iwl_priv *priv)
5262 {
5263 int ret = 0;
5264
5265 IWL_DEBUG_INFO("Runtime Alive received.\n");
5266
5267 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5268 /* We had an error bringing up the hardware, so take it
5269 * all the way back down so we can try again */
5270 IWL_DEBUG_INFO("Alive failed.\n");
5271 goto restart;
5272 }
5273
5274 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5275 * This is a paranoid check, because we would not have gotten the
5276 * "runtime" alive if code weren't properly loaded. */
5277 if (iwl4965_verify_ucode(priv)) {
5278 /* Runtime instruction load was bad;
5279 * take it all the way back down so we can try again */
5280 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5281 goto restart;
5282 }
5283
5284 iwlcore_clear_stations_table(priv);
5285
5286 ret = priv->cfg->ops->lib->alive_notify(priv);
5287 if (ret) {
5288 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5289 ret);
5290 goto restart;
5291 }
5292
5293 /* After the ALIVE response, we can send host commands to 4965 uCode */
5294 set_bit(STATUS_ALIVE, &priv->status);
5295
5296 /* Clear out the uCode error bit if it is set */
5297 clear_bit(STATUS_FW_ERROR, &priv->status);
5298
5299 if (iwl_is_rfkill(priv))
5300 return;
5301
5302 ieee80211_start_queues(priv->hw);
5303
5304 priv->active_rate = priv->rates_mask;
5305 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5306
5307 iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5308
5309 if (iwl_is_associated(priv)) {
5310 struct iwl4965_rxon_cmd *active_rxon =
5311 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5312
5313 memcpy(&priv->staging_rxon, &priv->active_rxon,
5314 sizeof(priv->staging_rxon));
5315 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5316 } else {
5317 /* Initialize our rx_config data */
5318 iwl4965_connection_init_rx_config(priv);
5319 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5320 }
5321
5322 /* Configure Bluetooth device coexistence support */
5323 iwl4965_send_bt_config(priv);
5324
5325 /* Configure the adapter for unassociated operation */
5326 iwl4965_commit_rxon(priv);
5327
5328 /* At this point, the NIC is initialized and operational */
5329 priv->notif_missed_beacons = 0;
5330
5331 iwl4965_rf_kill_ct_config(priv);
5332
5333 iwl_leds_register(priv);
5334
5335 IWL_DEBUG_INFO("ALIVE processing complete.\n");
5336 set_bit(STATUS_READY, &priv->status);
5337 wake_up_interruptible(&priv->wait_command_queue);
5338
5339 if (priv->error_recovering)
5340 iwl4965_error_recovery(priv);
5341
5342 iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5343 ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5344 return;
5345
5346 restart:
5347 queue_work(priv->workqueue, &priv->restart);
5348 }
5349
5350 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5351
5352 static void __iwl4965_down(struct iwl_priv *priv)
5353 {
5354 unsigned long flags;
5355 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5356 struct ieee80211_conf *conf = NULL;
5357
5358 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5359
5360 conf = ieee80211_get_hw_conf(priv->hw);
5361
5362 if (!exit_pending)
5363 set_bit(STATUS_EXIT_PENDING, &priv->status);
5364
5365 iwl_leds_unregister(priv);
5366
5367 iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5368
5369 iwlcore_clear_stations_table(priv);
5370
5371 /* Unblock any waiting calls */
5372 wake_up_interruptible_all(&priv->wait_command_queue);
5373
5374 /* Wipe out the EXIT_PENDING status bit if we are not actually
5375 * exiting the module */
5376 if (!exit_pending)
5377 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5378
5379 /* stop and reset the on-board processor */
5380 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5381
5382 /* tell the device to stop sending interrupts */
5383 spin_lock_irqsave(&priv->lock, flags);
5384 iwl4965_disable_interrupts(priv);
5385 spin_unlock_irqrestore(&priv->lock, flags);
5386 iwl_synchronize_irq(priv);
5387
5388 if (priv->mac80211_registered)
5389 ieee80211_stop_queues(priv->hw);
5390
5391 /* If we have not previously called iwl4965_init() then
5392 * clear all bits but the RF Kill and SUSPEND bits and return */
5393 if (!iwl_is_init(priv)) {
5394 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5395 STATUS_RF_KILL_HW |
5396 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5397 STATUS_RF_KILL_SW |
5398 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5399 STATUS_GEO_CONFIGURED |
5400 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5401 STATUS_IN_SUSPEND;
5402 goto exit;
5403 }
5404
5405 /* ...otherwise clear out all the status bits but the RF Kill and
5406 * SUSPEND bits and continue taking the NIC down. */
5407 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5408 STATUS_RF_KILL_HW |
5409 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5410 STATUS_RF_KILL_SW |
5411 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5412 STATUS_GEO_CONFIGURED |
5413 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5414 STATUS_IN_SUSPEND |
5415 test_bit(STATUS_FW_ERROR, &priv->status) <<
5416 STATUS_FW_ERROR;
5417
5418 spin_lock_irqsave(&priv->lock, flags);
5419 iwl_clear_bit(priv, CSR_GP_CNTRL,
5420 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5421 spin_unlock_irqrestore(&priv->lock, flags);
5422
5423 iwl4965_hw_txq_ctx_stop(priv);
5424 iwl4965_hw_rxq_stop(priv);
5425
5426 spin_lock_irqsave(&priv->lock, flags);
5427 if (!iwl_grab_nic_access(priv)) {
5428 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5429 APMG_CLK_VAL_DMA_CLK_RQT);
5430 iwl_release_nic_access(priv);
5431 }
5432 spin_unlock_irqrestore(&priv->lock, flags);
5433
5434 udelay(5);
5435
5436 iwl4965_hw_nic_stop_master(priv);
5437 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5438 iwl4965_hw_nic_reset(priv);
5439
5440 exit:
5441 memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5442
5443 if (priv->ibss_beacon)
5444 dev_kfree_skb(priv->ibss_beacon);
5445 priv->ibss_beacon = NULL;
5446
5447 /* clear out any free frames */
5448 iwl4965_clear_free_frames(priv);
5449 }
5450
5451 static void iwl4965_down(struct iwl_priv *priv)
5452 {
5453 mutex_lock(&priv->mutex);
5454 __iwl4965_down(priv);
5455 mutex_unlock(&priv->mutex);
5456
5457 iwl4965_cancel_deferred_work(priv);
5458 }
5459
5460 #define MAX_HW_RESTARTS 5
5461
5462 static int __iwl4965_up(struct iwl_priv *priv)
5463 {
5464 int i;
5465 int ret;
5466
5467 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5468 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5469 return -EIO;
5470 }
5471
5472 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5473 IWL_WARNING("Radio disabled by SW RF kill (module "
5474 "parameter)\n");
5475 iwl_rfkill_set_hw_state(priv);
5476 return -ENODEV;
5477 }
5478
5479 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5480 IWL_ERROR("ucode not available for device bringup\n");
5481 return -EIO;
5482 }
5483
5484 /* If platform's RF_KILL switch is NOT set to KILL */
5485 if (iwl_read32(priv, CSR_GP_CNTRL) &
5486 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5487 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5488 else {
5489 set_bit(STATUS_RF_KILL_HW, &priv->status);
5490 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5491 iwl_rfkill_set_hw_state(priv);
5492 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5493 return -ENODEV;
5494 }
5495 }
5496
5497 iwl_rfkill_set_hw_state(priv);
5498 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5499
5500 ret = priv->cfg->ops->lib->hw_nic_init(priv);
5501 if (ret) {
5502 IWL_ERROR("Unable to init nic\n");
5503 return ret;
5504 }
5505
5506 /* make sure rfkill handshake bits are cleared */
5507 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5508 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5509 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5510
5511 /* clear (again), then enable host interrupts */
5512 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5513 iwl4965_enable_interrupts(priv);
5514
5515 /* really make sure rfkill handshake bits are cleared */
5516 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5517 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5518
5519 /* Copy original ucode data image from disk into backup cache.
5520 * This will be used to initialize the on-board processor's
5521 * data SRAM for a clean start when the runtime program first loads. */
5522 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5523 priv->ucode_data.len);
5524
5525 /* We return success when we resume from suspend and rf_kill is on. */
5526 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5527 return 0;
5528
5529 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5530
5531 iwlcore_clear_stations_table(priv);
5532
5533 /* load bootstrap state machine,
5534 * load bootstrap program into processor's memory,
5535 * prepare to load the "initialize" uCode */
5536 ret = priv->cfg->ops->lib->load_ucode(priv);
5537
5538 if (ret) {
5539 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5540 continue;
5541 }
5542
5543 /* start card; "initialize" will load runtime ucode */
5544 iwl4965_nic_start(priv);
5545
5546 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5547
5548 return 0;
5549 }
5550
5551 set_bit(STATUS_EXIT_PENDING, &priv->status);
5552 __iwl4965_down(priv);
5553
5554 /* tried to restart and config the device for as long as our
5555 * patience could withstand */
5556 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5557 return -EIO;
5558 }
5559
5560
5561 /*****************************************************************************
5562 *
5563 * Workqueue callbacks
5564 *
5565 *****************************************************************************/
5566
5567 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5568 {
5569 struct iwl_priv *priv =
5570 container_of(data, struct iwl_priv, init_alive_start.work);
5571
5572 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5573 return;
5574
5575 mutex_lock(&priv->mutex);
5576 iwl4965_init_alive_start(priv);
5577 mutex_unlock(&priv->mutex);
5578 }
5579
5580 static void iwl4965_bg_alive_start(struct work_struct *data)
5581 {
5582 struct iwl_priv *priv =
5583 container_of(data, struct iwl_priv, alive_start.work);
5584
5585 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5586 return;
5587
5588 mutex_lock(&priv->mutex);
5589 iwl4965_alive_start(priv);
5590 mutex_unlock(&priv->mutex);
5591 }
5592
5593 static void iwl4965_bg_rf_kill(struct work_struct *work)
5594 {
5595 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5596
5597 wake_up_interruptible(&priv->wait_command_queue);
5598
5599 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5600 return;
5601
5602 mutex_lock(&priv->mutex);
5603
5604 if (!iwl_is_rfkill(priv)) {
5605 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5606 "HW and/or SW RF Kill no longer active, restarting "
5607 "device\n");
5608 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5609 queue_work(priv->workqueue, &priv->restart);
5610 } else {
5611 /* make sure mac80211 stop sending Tx frame */
5612 if (priv->mac80211_registered)
5613 ieee80211_stop_queues(priv->hw);
5614
5615 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5616 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5617 "disabled by SW switch\n");
5618 else
5619 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5620 "Kill switch must be turned off for "
5621 "wireless networking to work.\n");
5622 }
5623 iwl_rfkill_set_hw_state(priv);
5624
5625 mutex_unlock(&priv->mutex);
5626 }
5627
5628 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5629
5630 static void iwl4965_bg_scan_check(struct work_struct *data)
5631 {
5632 struct iwl_priv *priv =
5633 container_of(data, struct iwl_priv, scan_check.work);
5634
5635 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5636 return;
5637
5638 mutex_lock(&priv->mutex);
5639 if (test_bit(STATUS_SCANNING, &priv->status) ||
5640 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5641 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5642 "Scan completion watchdog resetting adapter (%dms)\n",
5643 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5644
5645 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5646 iwl4965_send_scan_abort(priv);
5647 }
5648 mutex_unlock(&priv->mutex);
5649 }
5650
5651 static void iwl4965_bg_request_scan(struct work_struct *data)
5652 {
5653 struct iwl_priv *priv =
5654 container_of(data, struct iwl_priv, request_scan);
5655 struct iwl_host_cmd cmd = {
5656 .id = REPLY_SCAN_CMD,
5657 .len = sizeof(struct iwl4965_scan_cmd),
5658 .meta.flags = CMD_SIZE_HUGE,
5659 };
5660 struct iwl4965_scan_cmd *scan;
5661 struct ieee80211_conf *conf = NULL;
5662 u16 cmd_len;
5663 enum ieee80211_band band;
5664 u8 direct_mask;
5665 int ret = 0;
5666
5667 conf = ieee80211_get_hw_conf(priv->hw);
5668
5669 mutex_lock(&priv->mutex);
5670
5671 if (!iwl_is_ready(priv)) {
5672 IWL_WARNING("request scan called when driver not ready.\n");
5673 goto done;
5674 }
5675
5676 /* Make sure the scan wasn't cancelled before this queued work
5677 * was given the chance to run... */
5678 if (!test_bit(STATUS_SCANNING, &priv->status))
5679 goto done;
5680
5681 /* This should never be called or scheduled if there is currently
5682 * a scan active in the hardware. */
5683 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5684 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5685 "Ignoring second request.\n");
5686 ret = -EIO;
5687 goto done;
5688 }
5689
5690 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5691 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5692 goto done;
5693 }
5694
5695 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5696 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
5697 goto done;
5698 }
5699
5700 if (iwl_is_rfkill(priv)) {
5701 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5702 goto done;
5703 }
5704
5705 if (!test_bit(STATUS_READY, &priv->status)) {
5706 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
5707 goto done;
5708 }
5709
5710 if (!priv->scan_bands) {
5711 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5712 goto done;
5713 }
5714
5715 if (!priv->scan) {
5716 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5717 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5718 if (!priv->scan) {
5719 ret = -ENOMEM;
5720 goto done;
5721 }
5722 }
5723 scan = priv->scan;
5724 memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5725
5726 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5727 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5728
5729 if (iwl_is_associated(priv)) {
5730 u16 interval = 0;
5731 u32 extra;
5732 u32 suspend_time = 100;
5733 u32 scan_suspend_time = 100;
5734 unsigned long flags;
5735
5736 IWL_DEBUG_INFO("Scanning while associated...\n");
5737
5738 spin_lock_irqsave(&priv->lock, flags);
5739 interval = priv->beacon_int;
5740 spin_unlock_irqrestore(&priv->lock, flags);
5741
5742 scan->suspend_time = 0;
5743 scan->max_out_time = cpu_to_le32(200 * 1024);
5744 if (!interval)
5745 interval = suspend_time;
5746
5747 extra = (suspend_time / interval) << 22;
5748 scan_suspend_time = (extra |
5749 ((suspend_time % interval) * 1024));
5750 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5751 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5752 scan_suspend_time, interval);
5753 }
5754
5755 /* We should add the ability for user to lock to PASSIVE ONLY */
5756 if (priv->one_direct_scan) {
5757 IWL_DEBUG_SCAN
5758 ("Kicking off one direct scan for '%s'\n",
5759 iwl4965_escape_essid(priv->direct_ssid,
5760 priv->direct_ssid_len));
5761 scan->direct_scan[0].id = WLAN_EID_SSID;
5762 scan->direct_scan[0].len = priv->direct_ssid_len;
5763 memcpy(scan->direct_scan[0].ssid,
5764 priv->direct_ssid, priv->direct_ssid_len);
5765 direct_mask = 1;
5766 } else if (!iwl_is_associated(priv) && priv->essid_len) {
5767 IWL_DEBUG_SCAN
5768 ("Kicking off one direct scan for '%s' when not associated\n",
5769 iwl4965_escape_essid(priv->essid, priv->essid_len));
5770 scan->direct_scan[0].id = WLAN_EID_SSID;
5771 scan->direct_scan[0].len = priv->essid_len;
5772 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5773 direct_mask = 1;
5774 } else {
5775 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5776 direct_mask = 0;
5777 }
5778
5779 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5780 scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5781 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5782
5783
5784 switch (priv->scan_bands) {
5785 case 2:
5786 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5787 scan->tx_cmd.rate_n_flags =
5788 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5789 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5790
5791 scan->good_CRC_th = 0;
5792 band = IEEE80211_BAND_2GHZ;
5793 break;
5794
5795 case 1:
5796 scan->tx_cmd.rate_n_flags =
5797 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5798 RATE_MCS_ANT_B_MSK);
5799 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5800 band = IEEE80211_BAND_5GHZ;
5801 break;
5802
5803 default:
5804 IWL_WARNING("Invalid scan band count\n");
5805 goto done;
5806 }
5807
5808 /* We don't build a direct scan probe request; the uCode will do
5809 * that based on the direct_mask added to each channel entry */
5810 cmd_len = iwl4965_fill_probe_req(priv, band,
5811 (struct ieee80211_mgmt *)scan->data,
5812 IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5813
5814 scan->tx_cmd.len = cpu_to_le16(cmd_len);
5815 /* select Rx chains */
5816
5817 /* Force use of chains B and C (0x6) for scan Rx.
5818 * Avoid A (0x1) because of its off-channel reception on A-band.
5819 * MIMO is not used here, but value is required to make uCode happy. */
5820 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5821 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5822 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5823 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5824
5825 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5826 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5827
5828 if (direct_mask)
5829 scan->channel_count =
5830 iwl4965_get_channels_for_scan(
5831 priv, band, 1, /* active */
5832 direct_mask,
5833 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5834 else
5835 scan->channel_count =
5836 iwl4965_get_channels_for_scan(
5837 priv, band, 0, /* passive */
5838 direct_mask,
5839 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5840
5841 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5842 scan->channel_count * sizeof(struct iwl4965_scan_channel);
5843 cmd.data = scan;
5844 scan->len = cpu_to_le16(cmd.len);
5845
5846 set_bit(STATUS_SCAN_HW, &priv->status);
5847 ret = iwl_send_cmd_sync(priv, &cmd);
5848 if (ret)
5849 goto done;
5850
5851 queue_delayed_work(priv->workqueue, &priv->scan_check,
5852 IWL_SCAN_CHECK_WATCHDOG);
5853
5854 mutex_unlock(&priv->mutex);
5855 return;
5856
5857 done:
5858 /* inform mac80211 scan aborted */
5859 queue_work(priv->workqueue, &priv->scan_completed);
5860 mutex_unlock(&priv->mutex);
5861 }
5862
5863 static void iwl4965_bg_up(struct work_struct *data)
5864 {
5865 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5866
5867 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5868 return;
5869
5870 mutex_lock(&priv->mutex);
5871 __iwl4965_up(priv);
5872 mutex_unlock(&priv->mutex);
5873 }
5874
5875 static void iwl4965_bg_restart(struct work_struct *data)
5876 {
5877 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5878
5879 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5880 return;
5881
5882 iwl4965_down(priv);
5883 queue_work(priv->workqueue, &priv->up);
5884 }
5885
5886 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5887 {
5888 struct iwl_priv *priv =
5889 container_of(data, struct iwl_priv, rx_replenish);
5890
5891 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5892 return;
5893
5894 mutex_lock(&priv->mutex);
5895 iwl4965_rx_replenish(priv);
5896 mutex_unlock(&priv->mutex);
5897 }
5898
5899 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5900
5901 static void iwl4965_post_associate(struct iwl_priv *priv)
5902 {
5903 struct ieee80211_conf *conf = NULL;
5904 int ret = 0;
5905 DECLARE_MAC_BUF(mac);
5906
5907 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5908 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5909 return;
5910 }
5911
5912 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5913 priv->assoc_id,
5914 print_mac(mac, priv->active_rxon.bssid_addr));
5915
5916
5917 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5918 return;
5919
5920
5921 if (!priv->vif || !priv->is_open)
5922 return;
5923
5924 iwl4965_scan_cancel_timeout(priv, 200);
5925
5926 conf = ieee80211_get_hw_conf(priv->hw);
5927
5928 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5929 iwl4965_commit_rxon(priv);
5930
5931 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5932 iwl4965_setup_rxon_timing(priv);
5933 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5934 sizeof(priv->rxon_timing), &priv->rxon_timing);
5935 if (ret)
5936 IWL_WARNING("REPLY_RXON_TIMING failed - "
5937 "Attempting to continue.\n");
5938
5939 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5940
5941 #ifdef CONFIG_IWL4965_HT
5942 if (priv->current_ht_config.is_ht)
5943 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5944 #endif /* CONFIG_IWL4965_HT*/
5945 iwl4965_set_rxon_chain(priv);
5946 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5947
5948 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5949 priv->assoc_id, priv->beacon_int);
5950
5951 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5952 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5953 else
5954 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5955
5956 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5957 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5958 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5959 else
5960 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5961
5962 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5963 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5964
5965 }
5966
5967 iwl4965_commit_rxon(priv);
5968
5969 switch (priv->iw_mode) {
5970 case IEEE80211_IF_TYPE_STA:
5971 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5972 break;
5973
5974 case IEEE80211_IF_TYPE_IBSS:
5975
5976 /* clear out the station table */
5977 iwlcore_clear_stations_table(priv);
5978
5979 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5980 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5981 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5982 iwl4965_send_beacon_cmd(priv);
5983
5984 break;
5985
5986 default:
5987 IWL_ERROR("%s Should not be called in %d mode\n",
5988 __FUNCTION__, priv->iw_mode);
5989 break;
5990 }
5991
5992 iwl4965_sequence_reset(priv);
5993
5994 /* Enable Rx differential gain and sensitivity calibrations */
5995 iwl_chain_noise_reset(priv);
5996 priv->start_calib = 1;
5997
5998 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5999 priv->assoc_station_added = 1;
6000
6001 iwl4965_activate_qos(priv, 0);
6002
6003 /* we have just associated, don't start scan too early */
6004 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6005 }
6006
6007
6008 static void iwl4965_bg_post_associate(struct work_struct *data)
6009 {
6010 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6011 post_associate.work);
6012
6013 mutex_lock(&priv->mutex);
6014 iwl4965_post_associate(priv);
6015 mutex_unlock(&priv->mutex);
6016
6017 }
6018
6019 static void iwl4965_bg_abort_scan(struct work_struct *work)
6020 {
6021 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6022
6023 if (!iwl_is_ready(priv))
6024 return;
6025
6026 mutex_lock(&priv->mutex);
6027
6028 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6029 iwl4965_send_scan_abort(priv);
6030
6031 mutex_unlock(&priv->mutex);
6032 }
6033
6034 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6035
6036 static void iwl4965_bg_scan_completed(struct work_struct *work)
6037 {
6038 struct iwl_priv *priv =
6039 container_of(work, struct iwl_priv, scan_completed);
6040
6041 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6042
6043 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6044 return;
6045
6046 if (test_bit(STATUS_CONF_PENDING, &priv->status))
6047 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6048
6049 ieee80211_scan_completed(priv->hw);
6050
6051 /* Since setting the TXPOWER may have been deferred while
6052 * performing the scan, fire one off */
6053 mutex_lock(&priv->mutex);
6054 iwl4965_hw_reg_send_txpower(priv);
6055 mutex_unlock(&priv->mutex);
6056 }
6057
6058 /*****************************************************************************
6059 *
6060 * mac80211 entry point functions
6061 *
6062 *****************************************************************************/
6063
6064 #define UCODE_READY_TIMEOUT (2 * HZ)
6065
6066 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6067 {
6068 struct iwl_priv *priv = hw->priv;
6069 int ret;
6070
6071 IWL_DEBUG_MAC80211("enter\n");
6072
6073 if (pci_enable_device(priv->pci_dev)) {
6074 IWL_ERROR("Fail to pci_enable_device\n");
6075 return -ENODEV;
6076 }
6077 pci_restore_state(priv->pci_dev);
6078 pci_enable_msi(priv->pci_dev);
6079
6080 ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6081 DRV_NAME, priv);
6082 if (ret) {
6083 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6084 goto out_disable_msi;
6085 }
6086
6087 /* we should be verifying the device is ready to be opened */
6088 mutex_lock(&priv->mutex);
6089
6090 memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6091 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6092 * ucode filename and max sizes are card-specific. */
6093
6094 if (!priv->ucode_code.len) {
6095 ret = iwl4965_read_ucode(priv);
6096 if (ret) {
6097 IWL_ERROR("Could not read microcode: %d\n", ret);
6098 mutex_unlock(&priv->mutex);
6099 goto out_release_irq;
6100 }
6101 }
6102
6103 ret = __iwl4965_up(priv);
6104
6105 mutex_unlock(&priv->mutex);
6106
6107 if (ret)
6108 goto out_release_irq;
6109
6110 IWL_DEBUG_INFO("Start UP work done.\n");
6111
6112 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6113 return 0;
6114
6115 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6116 * mac80211 will not be run successfully. */
6117 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6118 test_bit(STATUS_READY, &priv->status),
6119 UCODE_READY_TIMEOUT);
6120 if (!ret) {
6121 if (!test_bit(STATUS_READY, &priv->status)) {
6122 IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6123 jiffies_to_msecs(UCODE_READY_TIMEOUT));
6124 ret = -ETIMEDOUT;
6125 goto out_release_irq;
6126 }
6127 }
6128
6129 priv->is_open = 1;
6130 IWL_DEBUG_MAC80211("leave\n");
6131 return 0;
6132
6133 out_release_irq:
6134 free_irq(priv->pci_dev->irq, priv);
6135 out_disable_msi:
6136 pci_disable_msi(priv->pci_dev);
6137 pci_disable_device(priv->pci_dev);
6138 priv->is_open = 0;
6139 IWL_DEBUG_MAC80211("leave - failed\n");
6140 return ret;
6141 }
6142
6143 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6144 {
6145 struct iwl_priv *priv = hw->priv;
6146
6147 IWL_DEBUG_MAC80211("enter\n");
6148
6149 if (!priv->is_open) {
6150 IWL_DEBUG_MAC80211("leave - skip\n");
6151 return;
6152 }
6153
6154 priv->is_open = 0;
6155
6156 if (iwl_is_ready_rf(priv)) {
6157 /* stop mac, cancel any scan request and clear
6158 * RXON_FILTER_ASSOC_MSK BIT
6159 */
6160 mutex_lock(&priv->mutex);
6161 iwl4965_scan_cancel_timeout(priv, 100);
6162 cancel_delayed_work(&priv->post_associate);
6163 mutex_unlock(&priv->mutex);
6164 }
6165
6166 iwl4965_down(priv);
6167
6168 flush_workqueue(priv->workqueue);
6169 free_irq(priv->pci_dev->irq, priv);
6170 pci_disable_msi(priv->pci_dev);
6171 pci_save_state(priv->pci_dev);
6172 pci_disable_device(priv->pci_dev);
6173
6174 IWL_DEBUG_MAC80211("leave\n");
6175 }
6176
6177 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6178 struct ieee80211_tx_control *ctl)
6179 {
6180 struct iwl_priv *priv = hw->priv;
6181
6182 IWL_DEBUG_MAC80211("enter\n");
6183
6184 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6185 IWL_DEBUG_MAC80211("leave - monitor\n");
6186 return -1;
6187 }
6188
6189 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6190 ctl->tx_rate->bitrate);
6191
6192 if (iwl4965_tx_skb(priv, skb, ctl))
6193 dev_kfree_skb_any(skb);
6194
6195 IWL_DEBUG_MAC80211("leave\n");
6196 return 0;
6197 }
6198
6199 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6200 struct ieee80211_if_init_conf *conf)
6201 {
6202 struct iwl_priv *priv = hw->priv;
6203 unsigned long flags;
6204 DECLARE_MAC_BUF(mac);
6205
6206 IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6207
6208 if (priv->vif) {
6209 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6210 return -EOPNOTSUPP;
6211 }
6212
6213 spin_lock_irqsave(&priv->lock, flags);
6214 priv->vif = conf->vif;
6215
6216 spin_unlock_irqrestore(&priv->lock, flags);
6217
6218 mutex_lock(&priv->mutex);
6219
6220 if (conf->mac_addr) {
6221 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6222 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6223 }
6224
6225 if (iwl_is_ready(priv))
6226 iwl4965_set_mode(priv, conf->type);
6227
6228 mutex_unlock(&priv->mutex);
6229
6230 IWL_DEBUG_MAC80211("leave\n");
6231 return 0;
6232 }
6233
6234 /**
6235 * iwl4965_mac_config - mac80211 config callback
6236 *
6237 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6238 * be set inappropriately and the driver currently sets the hardware up to
6239 * use it whenever needed.
6240 */
6241 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6242 {
6243 struct iwl_priv *priv = hw->priv;
6244 const struct iwl_channel_info *ch_info;
6245 unsigned long flags;
6246 int ret = 0;
6247
6248 mutex_lock(&priv->mutex);
6249 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6250
6251 priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6252
6253 if (!iwl_is_ready(priv)) {
6254 IWL_DEBUG_MAC80211("leave - not ready\n");
6255 ret = -EIO;
6256 goto out;
6257 }
6258
6259 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6260 test_bit(STATUS_SCANNING, &priv->status))) {
6261 IWL_DEBUG_MAC80211("leave - scanning\n");
6262 set_bit(STATUS_CONF_PENDING, &priv->status);
6263 mutex_unlock(&priv->mutex);
6264 return 0;
6265 }
6266
6267 spin_lock_irqsave(&priv->lock, flags);
6268
6269 ch_info = iwl_get_channel_info(priv, conf->channel->band,
6270 ieee80211_frequency_to_channel(conf->channel->center_freq));
6271 if (!is_channel_valid(ch_info)) {
6272 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6273 spin_unlock_irqrestore(&priv->lock, flags);
6274 ret = -EINVAL;
6275 goto out;
6276 }
6277
6278 #ifdef CONFIG_IWL4965_HT
6279 /* if we are switching from ht to 2.4 clear flags
6280 * from any ht related info since 2.4 does not
6281 * support ht */
6282 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6283 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6284 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6285 #endif
6286 )
6287 priv->staging_rxon.flags = 0;
6288 #endif /* CONFIG_IWL4965_HT */
6289
6290 iwlcore_set_rxon_channel(priv, conf->channel->band,
6291 ieee80211_frequency_to_channel(conf->channel->center_freq));
6292
6293 iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6294
6295 /* The list of supported rates and rate mask can be different
6296 * for each band; since the band may have changed, reset
6297 * the rate mask to what mac80211 lists */
6298 iwl4965_set_rate(priv);
6299
6300 spin_unlock_irqrestore(&priv->lock, flags);
6301
6302 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6303 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6304 iwl4965_hw_channel_switch(priv, conf->channel);
6305 goto out;
6306 }
6307 #endif
6308
6309 if (priv->cfg->ops->lib->radio_kill_sw)
6310 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6311
6312 if (!conf->radio_enabled) {
6313 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6314 goto out;
6315 }
6316
6317 if (iwl_is_rfkill(priv)) {
6318 IWL_DEBUG_MAC80211("leave - RF kill\n");
6319 ret = -EIO;
6320 goto out;
6321 }
6322
6323 iwl4965_set_rate(priv);
6324
6325 if (memcmp(&priv->active_rxon,
6326 &priv->staging_rxon, sizeof(priv->staging_rxon)))
6327 iwl4965_commit_rxon(priv);
6328 else
6329 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6330
6331 IWL_DEBUG_MAC80211("leave\n");
6332
6333 out:
6334 clear_bit(STATUS_CONF_PENDING, &priv->status);
6335 mutex_unlock(&priv->mutex);
6336 return ret;
6337 }
6338
6339 static void iwl4965_config_ap(struct iwl_priv *priv)
6340 {
6341 int ret = 0;
6342
6343 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6344 return;
6345
6346 /* The following should be done only at AP bring up */
6347 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6348
6349 /* RXON - unassoc (to set timing command) */
6350 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6351 iwl4965_commit_rxon(priv);
6352
6353 /* RXON Timing */
6354 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6355 iwl4965_setup_rxon_timing(priv);
6356 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6357 sizeof(priv->rxon_timing), &priv->rxon_timing);
6358 if (ret)
6359 IWL_WARNING("REPLY_RXON_TIMING failed - "
6360 "Attempting to continue.\n");
6361
6362 iwl4965_set_rxon_chain(priv);
6363
6364 /* FIXME: what should be the assoc_id for AP? */
6365 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6366 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6367 priv->staging_rxon.flags |=
6368 RXON_FLG_SHORT_PREAMBLE_MSK;
6369 else
6370 priv->staging_rxon.flags &=
6371 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6372
6373 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6374 if (priv->assoc_capability &
6375 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6376 priv->staging_rxon.flags |=
6377 RXON_FLG_SHORT_SLOT_MSK;
6378 else
6379 priv->staging_rxon.flags &=
6380 ~RXON_FLG_SHORT_SLOT_MSK;
6381
6382 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6383 priv->staging_rxon.flags &=
6384 ~RXON_FLG_SHORT_SLOT_MSK;
6385 }
6386 /* restore RXON assoc */
6387 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6388 iwl4965_commit_rxon(priv);
6389 iwl4965_activate_qos(priv, 1);
6390 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6391 }
6392 iwl4965_send_beacon_cmd(priv);
6393
6394 /* FIXME - we need to add code here to detect a totally new
6395 * configuration, reset the AP, unassoc, rxon timing, assoc,
6396 * clear sta table, add BCAST sta... */
6397 }
6398
6399 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6400 struct ieee80211_vif *vif,
6401 struct ieee80211_if_conf *conf)
6402 {
6403 struct iwl_priv *priv = hw->priv;
6404 DECLARE_MAC_BUF(mac);
6405 unsigned long flags;
6406 int rc;
6407
6408 if (conf == NULL)
6409 return -EIO;
6410
6411 if (priv->vif != vif) {
6412 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6413 return 0;
6414 }
6415
6416 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6417 (!conf->beacon || !conf->ssid_len)) {
6418 IWL_DEBUG_MAC80211
6419 ("Leaving in AP mode because HostAPD is not ready.\n");
6420 return 0;
6421 }
6422
6423 if (!iwl_is_alive(priv))
6424 return -EAGAIN;
6425
6426 mutex_lock(&priv->mutex);
6427
6428 if (conf->bssid)
6429 IWL_DEBUG_MAC80211("bssid: %s\n",
6430 print_mac(mac, conf->bssid));
6431
6432 /*
6433 * very dubious code was here; the probe filtering flag is never set:
6434 *
6435 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6436 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6437 */
6438
6439 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6440 if (!conf->bssid) {
6441 conf->bssid = priv->mac_addr;
6442 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6443 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6444 print_mac(mac, conf->bssid));
6445 }
6446 if (priv->ibss_beacon)
6447 dev_kfree_skb(priv->ibss_beacon);
6448
6449 priv->ibss_beacon = conf->beacon;
6450 }
6451
6452 if (iwl_is_rfkill(priv))
6453 goto done;
6454
6455 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6456 !is_multicast_ether_addr(conf->bssid)) {
6457 /* If there is currently a HW scan going on in the background
6458 * then we need to cancel it else the RXON below will fail. */
6459 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6460 IWL_WARNING("Aborted scan still in progress "
6461 "after 100ms\n");
6462 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6463 mutex_unlock(&priv->mutex);
6464 return -EAGAIN;
6465 }
6466 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6467
6468 /* TODO: Audit driver for usage of these members and see
6469 * if mac80211 deprecates them (priv->bssid looks like it
6470 * shouldn't be there, but I haven't scanned the IBSS code
6471 * to verify) - jpk */
6472 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6473
6474 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6475 iwl4965_config_ap(priv);
6476 else {
6477 rc = iwl4965_commit_rxon(priv);
6478 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6479 iwl4965_rxon_add_station(
6480 priv, priv->active_rxon.bssid_addr, 1);
6481 }
6482
6483 } else {
6484 iwl4965_scan_cancel_timeout(priv, 100);
6485 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6486 iwl4965_commit_rxon(priv);
6487 }
6488
6489 done:
6490 spin_lock_irqsave(&priv->lock, flags);
6491 if (!conf->ssid_len)
6492 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6493 else
6494 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6495
6496 priv->essid_len = conf->ssid_len;
6497 spin_unlock_irqrestore(&priv->lock, flags);
6498
6499 IWL_DEBUG_MAC80211("leave\n");
6500 mutex_unlock(&priv->mutex);
6501
6502 return 0;
6503 }
6504
6505 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6506 unsigned int changed_flags,
6507 unsigned int *total_flags,
6508 int mc_count, struct dev_addr_list *mc_list)
6509 {
6510 /*
6511 * XXX: dummy
6512 * see also iwl4965_connection_init_rx_config
6513 */
6514 *total_flags = 0;
6515 }
6516
6517 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6518 struct ieee80211_if_init_conf *conf)
6519 {
6520 struct iwl_priv *priv = hw->priv;
6521
6522 IWL_DEBUG_MAC80211("enter\n");
6523
6524 mutex_lock(&priv->mutex);
6525
6526 if (iwl_is_ready_rf(priv)) {
6527 iwl4965_scan_cancel_timeout(priv, 100);
6528 cancel_delayed_work(&priv->post_associate);
6529 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6530 iwl4965_commit_rxon(priv);
6531 }
6532 if (priv->vif == conf->vif) {
6533 priv->vif = NULL;
6534 memset(priv->bssid, 0, ETH_ALEN);
6535 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6536 priv->essid_len = 0;
6537 }
6538 mutex_unlock(&priv->mutex);
6539
6540 IWL_DEBUG_MAC80211("leave\n");
6541
6542 }
6543
6544
6545 #ifdef CONFIG_IWL4965_HT
6546 static void iwl4965_ht_conf(struct iwl_priv *priv,
6547 struct ieee80211_bss_conf *bss_conf)
6548 {
6549 struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6550 struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6551 struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6552
6553 IWL_DEBUG_MAC80211("enter: \n");
6554
6555 iwl_conf->is_ht = bss_conf->assoc_ht;
6556
6557 if (!iwl_conf->is_ht)
6558 return;
6559
6560 priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6561
6562 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6563 iwl_conf->sgf |= 0x1;
6564 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6565 iwl_conf->sgf |= 0x2;
6566
6567 iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6568 iwl_conf->max_amsdu_size =
6569 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6570
6571 iwl_conf->supported_chan_width =
6572 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6573 iwl_conf->extension_chan_offset =
6574 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6575 /* If no above or below channel supplied disable FAT channel */
6576 if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6577 iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6578 iwl_conf->supported_chan_width = 0;
6579
6580 iwl_conf->tx_mimo_ps_mode =
6581 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6582 memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6583
6584 iwl_conf->control_channel = ht_bss_conf->primary_channel;
6585 iwl_conf->tx_chan_width =
6586 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6587 iwl_conf->ht_protection =
6588 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6589 iwl_conf->non_GF_STA_present =
6590 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6591
6592 IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6593 IWL_DEBUG_MAC80211("leave\n");
6594 }
6595 #else
6596 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6597 struct ieee80211_bss_conf *bss_conf)
6598 {
6599 }
6600 #endif
6601
6602 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6603 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6604 struct ieee80211_vif *vif,
6605 struct ieee80211_bss_conf *bss_conf,
6606 u32 changes)
6607 {
6608 struct iwl_priv *priv = hw->priv;
6609
6610 IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6611
6612 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6613 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6614 bss_conf->use_short_preamble);
6615 if (bss_conf->use_short_preamble)
6616 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6617 else
6618 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6619 }
6620
6621 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6622 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6623 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6624 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6625 else
6626 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6627 }
6628
6629 if (changes & BSS_CHANGED_HT) {
6630 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6631 iwl4965_ht_conf(priv, bss_conf);
6632 iwl4965_set_rxon_chain(priv);
6633 }
6634
6635 if (changes & BSS_CHANGED_ASSOC) {
6636 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6637 /* This should never happen as this function should
6638 * never be called from interrupt context. */
6639 if (WARN_ON_ONCE(in_interrupt()))
6640 return;
6641 if (bss_conf->assoc) {
6642 priv->assoc_id = bss_conf->aid;
6643 priv->beacon_int = bss_conf->beacon_int;
6644 priv->timestamp = bss_conf->timestamp;
6645 priv->assoc_capability = bss_conf->assoc_capability;
6646 priv->next_scan_jiffies = jiffies +
6647 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6648 mutex_lock(&priv->mutex);
6649 iwl4965_post_associate(priv);
6650 mutex_unlock(&priv->mutex);
6651 } else {
6652 priv->assoc_id = 0;
6653 IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6654 }
6655 } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6656 IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6657 iwl_send_rxon_assoc(priv);
6658 }
6659
6660 }
6661
6662 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6663 {
6664 int rc = 0;
6665 unsigned long flags;
6666 struct iwl_priv *priv = hw->priv;
6667
6668 IWL_DEBUG_MAC80211("enter\n");
6669
6670 mutex_lock(&priv->mutex);
6671 spin_lock_irqsave(&priv->lock, flags);
6672
6673 if (!iwl_is_ready_rf(priv)) {
6674 rc = -EIO;
6675 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6676 goto out_unlock;
6677 }
6678
6679 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
6680 rc = -EIO;
6681 IWL_ERROR("ERROR: APs don't scan\n");
6682 goto out_unlock;
6683 }
6684
6685 /* we don't schedule scan within next_scan_jiffies period */
6686 if (priv->next_scan_jiffies &&
6687 time_after(priv->next_scan_jiffies, jiffies)) {
6688 rc = -EAGAIN;
6689 goto out_unlock;
6690 }
6691 /* if we just finished scan ask for delay */
6692 if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6693 IWL_DELAY_NEXT_SCAN, jiffies)) {
6694 rc = -EAGAIN;
6695 goto out_unlock;
6696 }
6697 if (len) {
6698 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6699 iwl4965_escape_essid(ssid, len), (int)len);
6700
6701 priv->one_direct_scan = 1;
6702 priv->direct_ssid_len = (u8)
6703 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6704 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6705 } else
6706 priv->one_direct_scan = 0;
6707
6708 rc = iwl4965_scan_initiate(priv);
6709
6710 IWL_DEBUG_MAC80211("leave\n");
6711
6712 out_unlock:
6713 spin_unlock_irqrestore(&priv->lock, flags);
6714 mutex_unlock(&priv->mutex);
6715
6716 return rc;
6717 }
6718
6719 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6720 struct ieee80211_key_conf *keyconf, const u8 *addr,
6721 u32 iv32, u16 *phase1key)
6722 {
6723 struct iwl_priv *priv = hw->priv;
6724 u8 sta_id = IWL_INVALID_STATION;
6725 unsigned long flags;
6726 __le16 key_flags = 0;
6727 int i;
6728 DECLARE_MAC_BUF(mac);
6729
6730 IWL_DEBUG_MAC80211("enter\n");
6731
6732 sta_id = iwl_find_station(priv, addr);
6733 if (sta_id == IWL_INVALID_STATION) {
6734 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6735 print_mac(mac, addr));
6736 return;
6737 }
6738
6739 iwl4965_scan_cancel_timeout(priv, 100);
6740
6741 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6742 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6743 key_flags &= ~STA_KEY_FLG_INVALID;
6744
6745 if (sta_id == priv->hw_params.bcast_sta_id)
6746 key_flags |= STA_KEY_MULTICAST_MSK;
6747
6748 spin_lock_irqsave(&priv->sta_lock, flags);
6749
6750 priv->stations[sta_id].sta.key.key_flags = key_flags;
6751 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6752
6753 for (i = 0; i < 5; i++)
6754 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6755 cpu_to_le16(phase1key[i]);
6756
6757 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6758 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6759
6760 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6761
6762 spin_unlock_irqrestore(&priv->sta_lock, flags);
6763
6764 IWL_DEBUG_MAC80211("leave\n");
6765 }
6766
6767 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6768 const u8 *local_addr, const u8 *addr,
6769 struct ieee80211_key_conf *key)
6770 {
6771 struct iwl_priv *priv = hw->priv;
6772 DECLARE_MAC_BUF(mac);
6773 int ret = 0;
6774 u8 sta_id = IWL_INVALID_STATION;
6775 u8 is_default_wep_key = 0;
6776
6777 IWL_DEBUG_MAC80211("enter\n");
6778
6779 if (priv->cfg->mod_params->sw_crypto) {
6780 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6781 return -EOPNOTSUPP;
6782 }
6783
6784 if (is_zero_ether_addr(addr))
6785 /* only support pairwise keys */
6786 return -EOPNOTSUPP;
6787
6788 sta_id = iwl_find_station(priv, addr);
6789 if (sta_id == IWL_INVALID_STATION) {
6790 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6791 print_mac(mac, addr));
6792 return -EINVAL;
6793
6794 }
6795
6796 mutex_lock(&priv->mutex);
6797 iwl4965_scan_cancel_timeout(priv, 100);
6798 mutex_unlock(&priv->mutex);
6799
6800 /* If we are getting WEP group key and we didn't receive any key mapping
6801 * so far, we are in legacy wep mode (group key only), otherwise we are
6802 * in 1X mode.
6803 * In legacy wep mode, we use another host command to the uCode */
6804 if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6805 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6806 if (cmd == SET_KEY)
6807 is_default_wep_key = !priv->key_mapping_key;
6808 else
6809 is_default_wep_key = priv->default_wep_key;
6810 }
6811
6812 switch (cmd) {
6813 case SET_KEY:
6814 if (is_default_wep_key)
6815 ret = iwl_set_default_wep_key(priv, key);
6816 else
6817 ret = iwl_set_dynamic_key(priv, key, sta_id);
6818
6819 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6820 break;
6821 case DISABLE_KEY:
6822 if (is_default_wep_key)
6823 ret = iwl_remove_default_wep_key(priv, key);
6824 else
6825 ret = iwl_remove_dynamic_key(priv, key, sta_id);
6826
6827 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6828 break;
6829 default:
6830 ret = -EINVAL;
6831 }
6832
6833 IWL_DEBUG_MAC80211("leave\n");
6834
6835 return ret;
6836 }
6837
6838 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6839 const struct ieee80211_tx_queue_params *params)
6840 {
6841 struct iwl_priv *priv = hw->priv;
6842 unsigned long flags;
6843 int q;
6844
6845 IWL_DEBUG_MAC80211("enter\n");
6846
6847 if (!iwl_is_ready_rf(priv)) {
6848 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6849 return -EIO;
6850 }
6851
6852 if (queue >= AC_NUM) {
6853 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6854 return 0;
6855 }
6856
6857 if (!priv->qos_data.qos_enable) {
6858 priv->qos_data.qos_active = 0;
6859 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6860 return 0;
6861 }
6862 q = AC_NUM - 1 - queue;
6863
6864 spin_lock_irqsave(&priv->lock, flags);
6865
6866 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6867 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6868 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6869 priv->qos_data.def_qos_parm.ac[q].edca_txop =
6870 cpu_to_le16((params->txop * 32));
6871
6872 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6873 priv->qos_data.qos_active = 1;
6874
6875 spin_unlock_irqrestore(&priv->lock, flags);
6876
6877 mutex_lock(&priv->mutex);
6878 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6879 iwl4965_activate_qos(priv, 1);
6880 else if (priv->assoc_id && iwl_is_associated(priv))
6881 iwl4965_activate_qos(priv, 0);
6882
6883 mutex_unlock(&priv->mutex);
6884
6885 IWL_DEBUG_MAC80211("leave\n");
6886 return 0;
6887 }
6888
6889 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6890 struct ieee80211_tx_queue_stats *stats)
6891 {
6892 struct iwl_priv *priv = hw->priv;
6893 int i, avail;
6894 struct iwl4965_tx_queue *txq;
6895 struct iwl4965_queue *q;
6896 unsigned long flags;
6897
6898 IWL_DEBUG_MAC80211("enter\n");
6899
6900 if (!iwl_is_ready_rf(priv)) {
6901 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6902 return -EIO;
6903 }
6904
6905 spin_lock_irqsave(&priv->lock, flags);
6906
6907 for (i = 0; i < AC_NUM; i++) {
6908 txq = &priv->txq[i];
6909 q = &txq->q;
6910 avail = iwl4965_queue_space(q);
6911
6912 stats->data[i].len = q->n_window - avail;
6913 stats->data[i].limit = q->n_window - q->high_mark;
6914 stats->data[i].count = q->n_window;
6915
6916 }
6917 spin_unlock_irqrestore(&priv->lock, flags);
6918
6919 IWL_DEBUG_MAC80211("leave\n");
6920
6921 return 0;
6922 }
6923
6924 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6925 struct ieee80211_low_level_stats *stats)
6926 {
6927 IWL_DEBUG_MAC80211("enter\n");
6928 IWL_DEBUG_MAC80211("leave\n");
6929
6930 return 0;
6931 }
6932
6933 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6934 {
6935 IWL_DEBUG_MAC80211("enter\n");
6936 IWL_DEBUG_MAC80211("leave\n");
6937
6938 return 0;
6939 }
6940
6941 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6942 {
6943 struct iwl_priv *priv = hw->priv;
6944 unsigned long flags;
6945
6946 mutex_lock(&priv->mutex);
6947 IWL_DEBUG_MAC80211("enter\n");
6948
6949 priv->lq_mngr.lq_ready = 0;
6950 #ifdef CONFIG_IWL4965_HT
6951 spin_lock_irqsave(&priv->lock, flags);
6952 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6953 spin_unlock_irqrestore(&priv->lock, flags);
6954 #endif /* CONFIG_IWL4965_HT */
6955
6956 iwlcore_reset_qos(priv);
6957
6958 cancel_delayed_work(&priv->post_associate);
6959
6960 spin_lock_irqsave(&priv->lock, flags);
6961 priv->assoc_id = 0;
6962 priv->assoc_capability = 0;
6963 priv->assoc_station_added = 0;
6964
6965 /* new association get rid of ibss beacon skb */
6966 if (priv->ibss_beacon)
6967 dev_kfree_skb(priv->ibss_beacon);
6968
6969 priv->ibss_beacon = NULL;
6970
6971 priv->beacon_int = priv->hw->conf.beacon_int;
6972 priv->timestamp = 0;
6973 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6974 priv->beacon_int = 0;
6975
6976 spin_unlock_irqrestore(&priv->lock, flags);
6977
6978 if (!iwl_is_ready_rf(priv)) {
6979 IWL_DEBUG_MAC80211("leave - not ready\n");
6980 mutex_unlock(&priv->mutex);
6981 return;
6982 }
6983
6984 /* we are restarting association process
6985 * clear RXON_FILTER_ASSOC_MSK bit
6986 */
6987 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6988 iwl4965_scan_cancel_timeout(priv, 100);
6989 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6990 iwl4965_commit_rxon(priv);
6991 }
6992
6993 /* Per mac80211.h: This is only used in IBSS mode... */
6994 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6995
6996 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6997 mutex_unlock(&priv->mutex);
6998 return;
6999 }
7000
7001 iwl4965_set_rate(priv);
7002
7003 mutex_unlock(&priv->mutex);
7004
7005 IWL_DEBUG_MAC80211("leave\n");
7006 }
7007
7008 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7009 struct ieee80211_tx_control *control)
7010 {
7011 struct iwl_priv *priv = hw->priv;
7012 unsigned long flags;
7013
7014 mutex_lock(&priv->mutex);
7015 IWL_DEBUG_MAC80211("enter\n");
7016
7017 if (!iwl_is_ready_rf(priv)) {
7018 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7019 mutex_unlock(&priv->mutex);
7020 return -EIO;
7021 }
7022
7023 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7024 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7025 mutex_unlock(&priv->mutex);
7026 return -EIO;
7027 }
7028
7029 spin_lock_irqsave(&priv->lock, flags);
7030
7031 if (priv->ibss_beacon)
7032 dev_kfree_skb(priv->ibss_beacon);
7033
7034 priv->ibss_beacon = skb;
7035
7036 priv->assoc_id = 0;
7037
7038 IWL_DEBUG_MAC80211("leave\n");
7039 spin_unlock_irqrestore(&priv->lock, flags);
7040
7041 iwlcore_reset_qos(priv);
7042
7043 queue_work(priv->workqueue, &priv->post_associate.work);
7044
7045 mutex_unlock(&priv->mutex);
7046
7047 return 0;
7048 }
7049
7050 /*****************************************************************************
7051 *
7052 * sysfs attributes
7053 *
7054 *****************************************************************************/
7055
7056 #ifdef CONFIG_IWLWIFI_DEBUG
7057
7058 /*
7059 * The following adds a new attribute to the sysfs representation
7060 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7061 * used for controlling the debug level.
7062 *
7063 * See the level definitions in iwl for details.
7064 */
7065
7066 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7067 {
7068 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7069 }
7070 static ssize_t store_debug_level(struct device_driver *d,
7071 const char *buf, size_t count)
7072 {
7073 char *p = (char *)buf;
7074 u32 val;
7075
7076 val = simple_strtoul(p, &p, 0);
7077 if (p == buf)
7078 printk(KERN_INFO DRV_NAME
7079 ": %s is not in hex or decimal form.\n", buf);
7080 else
7081 iwl_debug_level = val;
7082
7083 return strnlen(buf, count);
7084 }
7085
7086 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7087 show_debug_level, store_debug_level);
7088
7089 #endif /* CONFIG_IWLWIFI_DEBUG */
7090
7091
7092 static ssize_t show_temperature(struct device *d,
7093 struct device_attribute *attr, char *buf)
7094 {
7095 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7096
7097 if (!iwl_is_alive(priv))
7098 return -EAGAIN;
7099
7100 return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7101 }
7102
7103 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7104
7105 static ssize_t show_rs_window(struct device *d,
7106 struct device_attribute *attr,
7107 char *buf)
7108 {
7109 struct iwl_priv *priv = d->driver_data;
7110 return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7111 }
7112 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7113
7114 static ssize_t show_tx_power(struct device *d,
7115 struct device_attribute *attr, char *buf)
7116 {
7117 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7118 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7119 }
7120
7121 static ssize_t store_tx_power(struct device *d,
7122 struct device_attribute *attr,
7123 const char *buf, size_t count)
7124 {
7125 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7126 char *p = (char *)buf;
7127 u32 val;
7128
7129 val = simple_strtoul(p, &p, 10);
7130 if (p == buf)
7131 printk(KERN_INFO DRV_NAME
7132 ": %s is not in decimal form.\n", buf);
7133 else
7134 iwl4965_hw_reg_set_txpower(priv, val);
7135
7136 return count;
7137 }
7138
7139 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7140
7141 static ssize_t show_flags(struct device *d,
7142 struct device_attribute *attr, char *buf)
7143 {
7144 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7145
7146 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7147 }
7148
7149 static ssize_t store_flags(struct device *d,
7150 struct device_attribute *attr,
7151 const char *buf, size_t count)
7152 {
7153 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7154 u32 flags = simple_strtoul(buf, NULL, 0);
7155
7156 mutex_lock(&priv->mutex);
7157 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7158 /* Cancel any currently running scans... */
7159 if (iwl4965_scan_cancel_timeout(priv, 100))
7160 IWL_WARNING("Could not cancel scan.\n");
7161 else {
7162 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7163 flags);
7164 priv->staging_rxon.flags = cpu_to_le32(flags);
7165 iwl4965_commit_rxon(priv);
7166 }
7167 }
7168 mutex_unlock(&priv->mutex);
7169
7170 return count;
7171 }
7172
7173 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7174
7175 static ssize_t show_filter_flags(struct device *d,
7176 struct device_attribute *attr, char *buf)
7177 {
7178 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7179
7180 return sprintf(buf, "0x%04X\n",
7181 le32_to_cpu(priv->active_rxon.filter_flags));
7182 }
7183
7184 static ssize_t store_filter_flags(struct device *d,
7185 struct device_attribute *attr,
7186 const char *buf, size_t count)
7187 {
7188 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7189 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7190
7191 mutex_lock(&priv->mutex);
7192 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7193 /* Cancel any currently running scans... */
7194 if (iwl4965_scan_cancel_timeout(priv, 100))
7195 IWL_WARNING("Could not cancel scan.\n");
7196 else {
7197 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7198 "0x%04X\n", filter_flags);
7199 priv->staging_rxon.filter_flags =
7200 cpu_to_le32(filter_flags);
7201 iwl4965_commit_rxon(priv);
7202 }
7203 }
7204 mutex_unlock(&priv->mutex);
7205
7206 return count;
7207 }
7208
7209 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7210 store_filter_flags);
7211
7212 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7213
7214 static ssize_t show_measurement(struct device *d,
7215 struct device_attribute *attr, char *buf)
7216 {
7217 struct iwl_priv *priv = dev_get_drvdata(d);
7218 struct iwl4965_spectrum_notification measure_report;
7219 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7220 u8 *data = (u8 *) & measure_report;
7221 unsigned long flags;
7222
7223 spin_lock_irqsave(&priv->lock, flags);
7224 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7225 spin_unlock_irqrestore(&priv->lock, flags);
7226 return 0;
7227 }
7228 memcpy(&measure_report, &priv->measure_report, size);
7229 priv->measurement_status = 0;
7230 spin_unlock_irqrestore(&priv->lock, flags);
7231
7232 while (size && (PAGE_SIZE - len)) {
7233 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7234 PAGE_SIZE - len, 1);
7235 len = strlen(buf);
7236 if (PAGE_SIZE - len)
7237 buf[len++] = '\n';
7238
7239 ofs += 16;
7240 size -= min(size, 16U);
7241 }
7242
7243 return len;
7244 }
7245
7246 static ssize_t store_measurement(struct device *d,
7247 struct device_attribute *attr,
7248 const char *buf, size_t count)
7249 {
7250 struct iwl_priv *priv = dev_get_drvdata(d);
7251 struct ieee80211_measurement_params params = {
7252 .channel = le16_to_cpu(priv->active_rxon.channel),
7253 .start_time = cpu_to_le64(priv->last_tsf),
7254 .duration = cpu_to_le16(1),
7255 };
7256 u8 type = IWL_MEASURE_BASIC;
7257 u8 buffer[32];
7258 u8 channel;
7259
7260 if (count) {
7261 char *p = buffer;
7262 strncpy(buffer, buf, min(sizeof(buffer), count));
7263 channel = simple_strtoul(p, NULL, 0);
7264 if (channel)
7265 params.channel = channel;
7266
7267 p = buffer;
7268 while (*p && *p != ' ')
7269 p++;
7270 if (*p)
7271 type = simple_strtoul(p + 1, NULL, 0);
7272 }
7273
7274 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7275 "channel %d (for '%s')\n", type, params.channel, buf);
7276 iwl4965_get_measurement(priv, &params, type);
7277
7278 return count;
7279 }
7280
7281 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7282 show_measurement, store_measurement);
7283 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7284
7285 static ssize_t store_retry_rate(struct device *d,
7286 struct device_attribute *attr,
7287 const char *buf, size_t count)
7288 {
7289 struct iwl_priv *priv = dev_get_drvdata(d);
7290
7291 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7292 if (priv->retry_rate <= 0)
7293 priv->retry_rate = 1;
7294
7295 return count;
7296 }
7297
7298 static ssize_t show_retry_rate(struct device *d,
7299 struct device_attribute *attr, char *buf)
7300 {
7301 struct iwl_priv *priv = dev_get_drvdata(d);
7302 return sprintf(buf, "%d", priv->retry_rate);
7303 }
7304
7305 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7306 store_retry_rate);
7307
7308 static ssize_t store_power_level(struct device *d,
7309 struct device_attribute *attr,
7310 const char *buf, size_t count)
7311 {
7312 struct iwl_priv *priv = dev_get_drvdata(d);
7313 int rc;
7314 int mode;
7315
7316 mode = simple_strtoul(buf, NULL, 0);
7317 mutex_lock(&priv->mutex);
7318
7319 if (!iwl_is_ready(priv)) {
7320 rc = -EAGAIN;
7321 goto out;
7322 }
7323
7324 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7325 mode = IWL_POWER_AC;
7326 else
7327 mode |= IWL_POWER_ENABLED;
7328
7329 if (mode != priv->power_mode) {
7330 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7331 if (rc) {
7332 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7333 goto out;
7334 }
7335 priv->power_mode = mode;
7336 }
7337
7338 rc = count;
7339
7340 out:
7341 mutex_unlock(&priv->mutex);
7342 return rc;
7343 }
7344
7345 #define MAX_WX_STRING 80
7346
7347 /* Values are in microsecond */
7348 static const s32 timeout_duration[] = {
7349 350000,
7350 250000,
7351 75000,
7352 37000,
7353 25000,
7354 };
7355 static const s32 period_duration[] = {
7356 400000,
7357 700000,
7358 1000000,
7359 1000000,
7360 1000000
7361 };
7362
7363 static ssize_t show_power_level(struct device *d,
7364 struct device_attribute *attr, char *buf)
7365 {
7366 struct iwl_priv *priv = dev_get_drvdata(d);
7367 int level = IWL_POWER_LEVEL(priv->power_mode);
7368 char *p = buf;
7369
7370 p += sprintf(p, "%d ", level);
7371 switch (level) {
7372 case IWL_POWER_MODE_CAM:
7373 case IWL_POWER_AC:
7374 p += sprintf(p, "(AC)");
7375 break;
7376 case IWL_POWER_BATTERY:
7377 p += sprintf(p, "(BATTERY)");
7378 break;
7379 default:
7380 p += sprintf(p,
7381 "(Timeout %dms, Period %dms)",
7382 timeout_duration[level - 1] / 1000,
7383 period_duration[level - 1] / 1000);
7384 }
7385
7386 if (!(priv->power_mode & IWL_POWER_ENABLED))
7387 p += sprintf(p, " OFF\n");
7388 else
7389 p += sprintf(p, " \n");
7390
7391 return (p - buf + 1);
7392
7393 }
7394
7395 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7396 store_power_level);
7397
7398 static ssize_t show_channels(struct device *d,
7399 struct device_attribute *attr, char *buf)
7400 {
7401 /* all this shit doesn't belong into sysfs anyway */
7402 return 0;
7403 }
7404
7405 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7406
7407 static ssize_t show_statistics(struct device *d,
7408 struct device_attribute *attr, char *buf)
7409 {
7410 struct iwl_priv *priv = dev_get_drvdata(d);
7411 u32 size = sizeof(struct iwl4965_notif_statistics);
7412 u32 len = 0, ofs = 0;
7413 u8 *data = (u8 *) & priv->statistics;
7414 int rc = 0;
7415
7416 if (!iwl_is_alive(priv))
7417 return -EAGAIN;
7418
7419 mutex_lock(&priv->mutex);
7420 rc = iwl_send_statistics_request(priv, 0);
7421 mutex_unlock(&priv->mutex);
7422
7423 if (rc) {
7424 len = sprintf(buf,
7425 "Error sending statistics request: 0x%08X\n", rc);
7426 return len;
7427 }
7428
7429 while (size && (PAGE_SIZE - len)) {
7430 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7431 PAGE_SIZE - len, 1);
7432 len = strlen(buf);
7433 if (PAGE_SIZE - len)
7434 buf[len++] = '\n';
7435
7436 ofs += 16;
7437 size -= min(size, 16U);
7438 }
7439
7440 return len;
7441 }
7442
7443 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7444
7445 static ssize_t show_antenna(struct device *d,
7446 struct device_attribute *attr, char *buf)
7447 {
7448 struct iwl_priv *priv = dev_get_drvdata(d);
7449
7450 if (!iwl_is_alive(priv))
7451 return -EAGAIN;
7452
7453 return sprintf(buf, "%d\n", priv->antenna);
7454 }
7455
7456 static ssize_t store_antenna(struct device *d,
7457 struct device_attribute *attr,
7458 const char *buf, size_t count)
7459 {
7460 int ant;
7461 struct iwl_priv *priv = dev_get_drvdata(d);
7462
7463 if (count == 0)
7464 return 0;
7465
7466 if (sscanf(buf, "%1i", &ant) != 1) {
7467 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7468 return count;
7469 }
7470
7471 if ((ant >= 0) && (ant <= 2)) {
7472 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7473 priv->antenna = (enum iwl4965_antenna)ant;
7474 } else
7475 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7476
7477
7478 return count;
7479 }
7480
7481 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7482
7483 static ssize_t show_status(struct device *d,
7484 struct device_attribute *attr, char *buf)
7485 {
7486 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7487 if (!iwl_is_alive(priv))
7488 return -EAGAIN;
7489 return sprintf(buf, "0x%08x\n", (int)priv->status);
7490 }
7491
7492 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7493
7494 static ssize_t dump_error_log(struct device *d,
7495 struct device_attribute *attr,
7496 const char *buf, size_t count)
7497 {
7498 char *p = (char *)buf;
7499
7500 if (p[0] == '1')
7501 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7502
7503 return strnlen(buf, count);
7504 }
7505
7506 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7507
7508 static ssize_t dump_event_log(struct device *d,
7509 struct device_attribute *attr,
7510 const char *buf, size_t count)
7511 {
7512 char *p = (char *)buf;
7513
7514 if (p[0] == '1')
7515 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7516
7517 return strnlen(buf, count);
7518 }
7519
7520 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7521
7522 /*****************************************************************************
7523 *
7524 * driver setup and teardown
7525 *
7526 *****************************************************************************/
7527
7528 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7529 {
7530 priv->workqueue = create_workqueue(DRV_NAME);
7531
7532 init_waitqueue_head(&priv->wait_command_queue);
7533
7534 INIT_WORK(&priv->up, iwl4965_bg_up);
7535 INIT_WORK(&priv->restart, iwl4965_bg_restart);
7536 INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7537 INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7538 INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7539 INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7540 INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7541 INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7542 INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7543 INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7544 INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7545 INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7546
7547 iwl4965_hw_setup_deferred_work(priv);
7548
7549 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7550 iwl4965_irq_tasklet, (unsigned long)priv);
7551 }
7552
7553 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7554 {
7555 iwl4965_hw_cancel_deferred_work(priv);
7556
7557 cancel_delayed_work_sync(&priv->init_alive_start);
7558 cancel_delayed_work(&priv->scan_check);
7559 cancel_delayed_work(&priv->alive_start);
7560 cancel_delayed_work(&priv->post_associate);
7561 cancel_work_sync(&priv->beacon_update);
7562 }
7563
7564 static struct attribute *iwl4965_sysfs_entries[] = {
7565 &dev_attr_antenna.attr,
7566 &dev_attr_channels.attr,
7567 &dev_attr_dump_errors.attr,
7568 &dev_attr_dump_events.attr,
7569 &dev_attr_flags.attr,
7570 &dev_attr_filter_flags.attr,
7571 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7572 &dev_attr_measurement.attr,
7573 #endif
7574 &dev_attr_power_level.attr,
7575 &dev_attr_retry_rate.attr,
7576 &dev_attr_rs_window.attr,
7577 &dev_attr_statistics.attr,
7578 &dev_attr_status.attr,
7579 &dev_attr_temperature.attr,
7580 &dev_attr_tx_power.attr,
7581
7582 NULL
7583 };
7584
7585 static struct attribute_group iwl4965_attribute_group = {
7586 .name = NULL, /* put in device directory */
7587 .attrs = iwl4965_sysfs_entries,
7588 };
7589
7590 static struct ieee80211_ops iwl4965_hw_ops = {
7591 .tx = iwl4965_mac_tx,
7592 .start = iwl4965_mac_start,
7593 .stop = iwl4965_mac_stop,
7594 .add_interface = iwl4965_mac_add_interface,
7595 .remove_interface = iwl4965_mac_remove_interface,
7596 .config = iwl4965_mac_config,
7597 .config_interface = iwl4965_mac_config_interface,
7598 .configure_filter = iwl4965_configure_filter,
7599 .set_key = iwl4965_mac_set_key,
7600 .update_tkip_key = iwl4965_mac_update_tkip_key,
7601 .get_stats = iwl4965_mac_get_stats,
7602 .get_tx_stats = iwl4965_mac_get_tx_stats,
7603 .conf_tx = iwl4965_mac_conf_tx,
7604 .get_tsf = iwl4965_mac_get_tsf,
7605 .reset_tsf = iwl4965_mac_reset_tsf,
7606 .beacon_update = iwl4965_mac_beacon_update,
7607 .bss_info_changed = iwl4965_bss_info_changed,
7608 #ifdef CONFIG_IWL4965_HT
7609 .ampdu_action = iwl4965_mac_ampdu_action,
7610 #endif /* CONFIG_IWL4965_HT */
7611 .hw_scan = iwl4965_mac_hw_scan
7612 };
7613
7614 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7615 {
7616 int err = 0;
7617 struct iwl_priv *priv;
7618 struct ieee80211_hw *hw;
7619 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7620 unsigned long flags;
7621 DECLARE_MAC_BUF(mac);
7622
7623 /************************
7624 * 1. Allocating HW data
7625 ************************/
7626
7627 /* Disabling hardware scan means that mac80211 will perform scans
7628 * "the hard way", rather than using device's scan. */
7629 if (cfg->mod_params->disable_hw_scan) {
7630 IWL_DEBUG_INFO("Disabling hw_scan\n");
7631 iwl4965_hw_ops.hw_scan = NULL;
7632 }
7633
7634 hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7635 if (!hw) {
7636 err = -ENOMEM;
7637 goto out;
7638 }
7639 priv = hw->priv;
7640 /* At this point both hw and priv are allocated. */
7641
7642 SET_IEEE80211_DEV(hw, &pdev->dev);
7643
7644 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7645 priv->cfg = cfg;
7646 priv->pci_dev = pdev;
7647
7648 #ifdef CONFIG_IWLWIFI_DEBUG
7649 iwl_debug_level = priv->cfg->mod_params->debug;
7650 atomic_set(&priv->restrict_refcnt, 0);
7651 #endif
7652
7653 /**************************
7654 * 2. Initializing PCI bus
7655 **************************/
7656 if (pci_enable_device(pdev)) {
7657 err = -ENODEV;
7658 goto out_ieee80211_free_hw;
7659 }
7660
7661 pci_set_master(pdev);
7662
7663 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7664 if (!err)
7665 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7666 if (err) {
7667 printk(KERN_WARNING DRV_NAME
7668 ": No suitable DMA available.\n");
7669 goto out_pci_disable_device;
7670 }
7671
7672 err = pci_request_regions(pdev, DRV_NAME);
7673 if (err)
7674 goto out_pci_disable_device;
7675
7676 pci_set_drvdata(pdev, priv);
7677
7678 /* We disable the RETRY_TIMEOUT register (0x41) to keep
7679 * PCI Tx retries from interfering with C3 CPU state */
7680 pci_write_config_byte(pdev, 0x41, 0x00);
7681
7682 /***********************
7683 * 3. Read REV register
7684 ***********************/
7685 priv->hw_base = pci_iomap(pdev, 0, 0);
7686 if (!priv->hw_base) {
7687 err = -ENODEV;
7688 goto out_pci_release_regions;
7689 }
7690
7691 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7692 (unsigned long long) pci_resource_len(pdev, 0));
7693 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7694
7695 printk(KERN_INFO DRV_NAME
7696 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7697
7698 /*****************
7699 * 4. Read EEPROM
7700 *****************/
7701 /* nic init */
7702 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7703 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7704
7705 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7706 err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7707 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7708 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7709 if (err < 0) {
7710 IWL_DEBUG_INFO("Failed to init the card\n");
7711 goto out_iounmap;
7712 }
7713 /* Read the EEPROM */
7714 err = iwl_eeprom_init(priv);
7715 if (err) {
7716 IWL_ERROR("Unable to init EEPROM\n");
7717 goto out_iounmap;
7718 }
7719 /* MAC Address location in EEPROM same for 3945/4965 */
7720 iwl_eeprom_get_mac(priv, priv->mac_addr);
7721 IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7722 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7723
7724 /************************
7725 * 5. Setup HW constants
7726 ************************/
7727 /* Device-specific setup */
7728 if (priv->cfg->ops->lib->set_hw_params(priv)) {
7729 IWL_ERROR("failed to set hw parameters\n");
7730 goto out_iounmap;
7731 }
7732
7733 /*******************
7734 * 6. Setup hw/priv
7735 *******************/
7736
7737 err = iwl_setup(priv);
7738 if (err)
7739 goto out_unset_hw_params;
7740 /* At this point both hw and priv are initialized. */
7741
7742 /**********************************
7743 * 7. Initialize module parameters
7744 **********************************/
7745
7746 /* Disable radio (SW RF KILL) via parameter when loading driver */
7747 if (priv->cfg->mod_params->disable) {
7748 set_bit(STATUS_RF_KILL_SW, &priv->status);
7749 IWL_DEBUG_INFO("Radio disabled.\n");
7750 }
7751
7752 if (priv->cfg->mod_params->enable_qos)
7753 priv->qos_data.qos_enable = 1;
7754
7755 /********************
7756 * 8. Setup services
7757 ********************/
7758 spin_lock_irqsave(&priv->lock, flags);
7759 iwl4965_disable_interrupts(priv);
7760 spin_unlock_irqrestore(&priv->lock, flags);
7761
7762 err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7763 if (err) {
7764 IWL_ERROR("failed to create sysfs device attributes\n");
7765 goto out_unset_hw_params;
7766 }
7767
7768 err = iwl_dbgfs_register(priv, DRV_NAME);
7769 if (err) {
7770 IWL_ERROR("failed to create debugfs files\n");
7771 goto out_remove_sysfs;
7772 }
7773
7774 iwl4965_setup_deferred_work(priv);
7775 iwl4965_setup_rx_handlers(priv);
7776
7777 /********************
7778 * 9. Conclude
7779 ********************/
7780 pci_save_state(pdev);
7781 pci_disable_device(pdev);
7782
7783 /* notify iwlcore to init */
7784 iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7785 return 0;
7786
7787 out_remove_sysfs:
7788 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7789 out_unset_hw_params:
7790 iwl4965_unset_hw_params(priv);
7791 out_iounmap:
7792 pci_iounmap(pdev, priv->hw_base);
7793 out_pci_release_regions:
7794 pci_release_regions(pdev);
7795 pci_set_drvdata(pdev, NULL);
7796 out_pci_disable_device:
7797 pci_disable_device(pdev);
7798 out_ieee80211_free_hw:
7799 ieee80211_free_hw(priv->hw);
7800 out:
7801 return err;
7802 }
7803
7804 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7805 {
7806 struct iwl_priv *priv = pci_get_drvdata(pdev);
7807 struct list_head *p, *q;
7808 int i;
7809 unsigned long flags;
7810
7811 if (!priv)
7812 return;
7813
7814 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7815
7816 if (priv->mac80211_registered) {
7817 ieee80211_unregister_hw(priv->hw);
7818 priv->mac80211_registered = 0;
7819 }
7820
7821 set_bit(STATUS_EXIT_PENDING, &priv->status);
7822
7823 iwl4965_down(priv);
7824
7825 /* make sure we flush any pending irq or
7826 * tasklet for the driver
7827 */
7828 spin_lock_irqsave(&priv->lock, flags);
7829 iwl4965_disable_interrupts(priv);
7830 spin_unlock_irqrestore(&priv->lock, flags);
7831
7832 iwl_synchronize_irq(priv);
7833
7834 /* Free MAC hash list for ADHOC */
7835 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7836 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7837 list_del(p);
7838 kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7839 }
7840 }
7841
7842 iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7843 iwl_dbgfs_unregister(priv);
7844 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7845
7846 iwl4965_dealloc_ucode_pci(priv);
7847
7848 if (priv->rxq.bd)
7849 iwl4965_rx_queue_free(priv, &priv->rxq);
7850 iwl4965_hw_txq_ctx_free(priv);
7851
7852 iwl4965_unset_hw_params(priv);
7853 iwlcore_clear_stations_table(priv);
7854
7855
7856 /*netif_stop_queue(dev); */
7857 flush_workqueue(priv->workqueue);
7858
7859 /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7860 * priv->workqueue... so we can't take down the workqueue
7861 * until now... */
7862 destroy_workqueue(priv->workqueue);
7863 priv->workqueue = NULL;
7864
7865 pci_iounmap(pdev, priv->hw_base);
7866 pci_release_regions(pdev);
7867 pci_disable_device(pdev);
7868 pci_set_drvdata(pdev, NULL);
7869
7870 iwl_free_channel_map(priv);
7871 iwl4965_free_geos(priv);
7872
7873 if (priv->ibss_beacon)
7874 dev_kfree_skb(priv->ibss_beacon);
7875
7876 ieee80211_free_hw(priv->hw);
7877 }
7878
7879 #ifdef CONFIG_PM
7880
7881 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7882 {
7883 struct iwl_priv *priv = pci_get_drvdata(pdev);
7884
7885 if (priv->is_open) {
7886 set_bit(STATUS_IN_SUSPEND, &priv->status);
7887 iwl4965_mac_stop(priv->hw);
7888 priv->is_open = 1;
7889 }
7890
7891 pci_set_power_state(pdev, PCI_D3hot);
7892
7893 return 0;
7894 }
7895
7896 static int iwl4965_pci_resume(struct pci_dev *pdev)
7897 {
7898 struct iwl_priv *priv = pci_get_drvdata(pdev);
7899
7900 pci_set_power_state(pdev, PCI_D0);
7901
7902 if (priv->is_open)
7903 iwl4965_mac_start(priv->hw);
7904
7905 clear_bit(STATUS_IN_SUSPEND, &priv->status);
7906 return 0;
7907 }
7908
7909 #endif /* CONFIG_PM */
7910
7911 /*****************************************************************************
7912 *
7913 * driver and module entry point
7914 *
7915 *****************************************************************************/
7916
7917 /* Hardware specific file defines the PCI IDs table for that hardware module */
7918 static struct pci_device_id iwl_hw_card_ids[] = {
7919 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7920 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7921 {0}
7922 };
7923 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7924
7925 static struct pci_driver iwl_driver = {
7926 .name = DRV_NAME,
7927 .id_table = iwl_hw_card_ids,
7928 .probe = iwl4965_pci_probe,
7929 .remove = __devexit_p(iwl4965_pci_remove),
7930 #ifdef CONFIG_PM
7931 .suspend = iwl4965_pci_suspend,
7932 .resume = iwl4965_pci_resume,
7933 #endif
7934 };
7935
7936 static int __init iwl4965_init(void)
7937 {
7938
7939 int ret;
7940 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7941 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7942
7943 ret = iwl4965_rate_control_register();
7944 if (ret) {
7945 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7946 return ret;
7947 }
7948
7949 ret = pci_register_driver(&iwl_driver);
7950 if (ret) {
7951 IWL_ERROR("Unable to initialize PCI module\n");
7952 goto error_register;
7953 }
7954 #ifdef CONFIG_IWLWIFI_DEBUG
7955 ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7956 if (ret) {
7957 IWL_ERROR("Unable to create driver sysfs file\n");
7958 goto error_debug;
7959 }
7960 #endif
7961
7962 return ret;
7963
7964 #ifdef CONFIG_IWLWIFI_DEBUG
7965 error_debug:
7966 pci_unregister_driver(&iwl_driver);
7967 #endif
7968 error_register:
7969 iwl4965_rate_control_unregister();
7970 return ret;
7971 }
7972
7973 static void __exit iwl4965_exit(void)
7974 {
7975 #ifdef CONFIG_IWLWIFI_DEBUG
7976 driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7977 #endif
7978 pci_unregister_driver(&iwl_driver);
7979 iwl4965_rate_control_unregister();
7980 }
7981
7982 module_exit(iwl4965_exit);
7983 module_init(iwl4965_init);
Linux kernel - Deliverables
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