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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[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-core.h"
50 #include "iwl-4965.h"
51 #include "iwl-io.h"
52 #include "iwl-helpers.h"
53
54 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
55 struct iwl4965_tx_queue *txq);
56
57 /******************************************************************************
58 *
59 * module boiler plate
60 *
61 ******************************************************************************/
62
63 /*
64 * module name, copyright, version, etc.
65 * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
66 */
67
68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
69
70 #ifdef CONFIG_IWLWIFI_DEBUG
71 #define VD "d"
72 #else
73 #define VD
74 #endif
75
76 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
77 #define VS "s"
78 #else
79 #define VS
80 #endif
81
82 #define DRV_VERSION IWLWIFI_VERSION VD VS
83
84
85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
86 MODULE_VERSION(DRV_VERSION);
87 MODULE_AUTHOR(DRV_COPYRIGHT);
88 MODULE_LICENSE("GPL");
89
90 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
91 {
92 u16 fc = le16_to_cpu(hdr->frame_control);
93 int hdr_len = ieee80211_get_hdrlen(fc);
94
95 if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
96 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
97 return NULL;
98 }
99
100 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
101 struct iwl_priv *priv, enum ieee80211_band band)
102 {
103 return priv->hw->wiphy->bands[band];
104 }
105
106 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
107 {
108 /* Single white space is for Linksys APs */
109 if (essid_len == 1 && essid[0] == ' ')
110 return 1;
111
112 /* Otherwise, if the entire essid is 0, we assume it is hidden */
113 while (essid_len) {
114 essid_len--;
115 if (essid[essid_len] != '\0')
116 return 0;
117 }
118
119 return 1;
120 }
121
122 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
123 {
124 static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
125 const char *s = essid;
126 char *d = escaped;
127
128 if (iwl4965_is_empty_essid(essid, essid_len)) {
129 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
130 return escaped;
131 }
132
133 essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
134 while (essid_len--) {
135 if (*s == '\0') {
136 *d++ = '\\';
137 *d++ = '0';
138 s++;
139 } else
140 *d++ = *s++;
141 }
142 *d = '\0';
143 return escaped;
144 }
145
146 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
147 * DMA services
148 *
149 * Theory of operation
150 *
151 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
152 * of buffer descriptors, each of which points to one or more data buffers for
153 * the device to read from or fill. Driver and device exchange status of each
154 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
155 * entries in each circular buffer, to protect against confusing empty and full
156 * queue states.
157 *
158 * The device reads or writes the data in the queues via the device's several
159 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
160 *
161 * For Tx queue, there are low mark and high mark limits. If, after queuing
162 * the packet for Tx, free space become < low mark, Tx queue stopped. When
163 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
164 * Tx queue resumed.
165 *
166 * The 4965 operates with up to 17 queues: One receive queue, one transmit
167 * queue (#4) for sending commands to the device firmware, and 15 other
168 * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
169 *
170 * See more detailed info in iwl-4965-hw.h.
171 ***************************************************/
172
173 int iwl4965_queue_space(const struct iwl4965_queue *q)
174 {
175 int s = q->read_ptr - q->write_ptr;
176
177 if (q->read_ptr > q->write_ptr)
178 s -= q->n_bd;
179
180 if (s <= 0)
181 s += q->n_window;
182 /* keep some reserve to not confuse empty and full situations */
183 s -= 2;
184 if (s < 0)
185 s = 0;
186 return s;
187 }
188
189
190 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
191 {
192 return q->write_ptr > q->read_ptr ?
193 (i >= q->read_ptr && i < q->write_ptr) :
194 !(i < q->read_ptr && i >= q->write_ptr);
195 }
196
197 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
198 {
199 /* This is for scan command, the big buffer at end of command array */
200 if (is_huge)
201 return q->n_window; /* must be power of 2 */
202
203 /* Otherwise, use normal size buffers */
204 return index & (q->n_window - 1);
205 }
206
207 /**
208 * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
209 */
210 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
211 int count, int slots_num, u32 id)
212 {
213 q->n_bd = count;
214 q->n_window = slots_num;
215 q->id = id;
216
217 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
218 * and iwl_queue_dec_wrap are broken. */
219 BUG_ON(!is_power_of_2(count));
220
221 /* slots_num must be power-of-two size, otherwise
222 * get_cmd_index is broken. */
223 BUG_ON(!is_power_of_2(slots_num));
224
225 q->low_mark = q->n_window / 4;
226 if (q->low_mark < 4)
227 q->low_mark = 4;
228
229 q->high_mark = q->n_window / 8;
230 if (q->high_mark < 2)
231 q->high_mark = 2;
232
233 q->write_ptr = q->read_ptr = 0;
234
235 return 0;
236 }
237
238 /**
239 * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
240 */
241 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
242 struct iwl4965_tx_queue *txq, u32 id)
243 {
244 struct pci_dev *dev = priv->pci_dev;
245
246 /* Driver private data, only for Tx (not command) queues,
247 * not shared with device. */
248 if (id != IWL_CMD_QUEUE_NUM) {
249 txq->txb = kmalloc(sizeof(txq->txb[0]) *
250 TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
251 if (!txq->txb) {
252 IWL_ERROR("kmalloc for auxiliary BD "
253 "structures failed\n");
254 goto error;
255 }
256 } else
257 txq->txb = NULL;
258
259 /* Circular buffer of transmit frame descriptors (TFDs),
260 * shared with device */
261 txq->bd = pci_alloc_consistent(dev,
262 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
263 &txq->q.dma_addr);
264
265 if (!txq->bd) {
266 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
267 sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
268 goto error;
269 }
270 txq->q.id = id;
271
272 return 0;
273
274 error:
275 if (txq->txb) {
276 kfree(txq->txb);
277 txq->txb = NULL;
278 }
279
280 return -ENOMEM;
281 }
282
283 /**
284 * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
285 */
286 int iwl4965_tx_queue_init(struct iwl_priv *priv,
287 struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
288 {
289 struct pci_dev *dev = priv->pci_dev;
290 int len;
291 int rc = 0;
292
293 /*
294 * Alloc buffer array for commands (Tx or other types of commands).
295 * For the command queue (#4), allocate command space + one big
296 * command for scan, since scan command is very huge; the system will
297 * not have two scans at the same time, so only one is needed.
298 * For normal Tx queues (all other queues), no super-size command
299 * space is needed.
300 */
301 len = sizeof(struct iwl_cmd) * slots_num;
302 if (txq_id == IWL_CMD_QUEUE_NUM)
303 len += IWL_MAX_SCAN_SIZE;
304 txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
305 if (!txq->cmd)
306 return -ENOMEM;
307
308 /* Alloc driver data array and TFD circular buffer */
309 rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
310 if (rc) {
311 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
312
313 return -ENOMEM;
314 }
315 txq->need_update = 0;
316
317 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
318 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
319 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
320
321 /* Initialize queue's high/low-water marks, and head/tail indexes */
322 iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
323
324 /* Tell device where to find queue */
325 iwl4965_hw_tx_queue_init(priv, txq);
326
327 return 0;
328 }
329
330 /**
331 * iwl4965_tx_queue_free - Deallocate DMA queue.
332 * @txq: Transmit queue to deallocate.
333 *
334 * Empty queue by removing and destroying all BD's.
335 * Free all buffers.
336 * 0-fill, but do not free "txq" descriptor structure.
337 */
338 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
339 {
340 struct iwl4965_queue *q = &txq->q;
341 struct pci_dev *dev = priv->pci_dev;
342 int len;
343
344 if (q->n_bd == 0)
345 return;
346
347 /* first, empty all BD's */
348 for (; q->write_ptr != q->read_ptr;
349 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
350 iwl4965_hw_txq_free_tfd(priv, txq);
351
352 len = sizeof(struct iwl_cmd) * q->n_window;
353 if (q->id == IWL_CMD_QUEUE_NUM)
354 len += IWL_MAX_SCAN_SIZE;
355
356 /* De-alloc array of command/tx buffers */
357 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
358
359 /* De-alloc circular buffer of TFDs */
360 if (txq->q.n_bd)
361 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
362 txq->q.n_bd, txq->bd, txq->q.dma_addr);
363
364 /* De-alloc array of per-TFD driver data */
365 if (txq->txb) {
366 kfree(txq->txb);
367 txq->txb = NULL;
368 }
369
370 /* 0-fill queue descriptor structure */
371 memset(txq, 0, sizeof(*txq));
372 }
373
374 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
375
376 /*************** STATION TABLE MANAGEMENT ****
377 * mac80211 should be examined to determine if sta_info is duplicating
378 * the functionality provided here
379 */
380
381 /**************************************************************/
382
383 #if 0 /* temporary disable till we add real remove station */
384 /**
385 * iwl4965_remove_station - Remove driver's knowledge of station.
386 *
387 * NOTE: This does not remove station from device's station table.
388 */
389 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
390 {
391 int index = IWL_INVALID_STATION;
392 int i;
393 unsigned long flags;
394
395 spin_lock_irqsave(&priv->sta_lock, flags);
396
397 if (is_ap)
398 index = IWL_AP_ID;
399 else if (is_broadcast_ether_addr(addr))
400 index = priv->hw_setting.bcast_sta_id;
401 else
402 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
403 if (priv->stations[i].used &&
404 !compare_ether_addr(priv->stations[i].sta.sta.addr,
405 addr)) {
406 index = i;
407 break;
408 }
409
410 if (unlikely(index == IWL_INVALID_STATION))
411 goto out;
412
413 if (priv->stations[index].used) {
414 priv->stations[index].used = 0;
415 priv->num_stations--;
416 }
417
418 BUG_ON(priv->num_stations < 0);
419
420 out:
421 spin_unlock_irqrestore(&priv->sta_lock, flags);
422 return 0;
423 }
424 #endif
425
426 /**
427 * iwl4965_add_station_flags - Add station to tables in driver and device
428 */
429 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
430 int is_ap, u8 flags, void *ht_data)
431 {
432 int i;
433 int index = IWL_INVALID_STATION;
434 struct iwl4965_station_entry *station;
435 unsigned long flags_spin;
436 DECLARE_MAC_BUF(mac);
437
438 spin_lock_irqsave(&priv->sta_lock, flags_spin);
439 if (is_ap)
440 index = IWL_AP_ID;
441 else if (is_broadcast_ether_addr(addr))
442 index = priv->hw_setting.bcast_sta_id;
443 else
444 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
445 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
446 addr)) {
447 index = i;
448 break;
449 }
450
451 if (!priv->stations[i].used &&
452 index == IWL_INVALID_STATION)
453 index = i;
454 }
455
456
457 /* These two conditions have the same outcome, but keep them separate
458 since they have different meanings */
459 if (unlikely(index == IWL_INVALID_STATION)) {
460 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
461 return index;
462 }
463
464 if (priv->stations[index].used &&
465 !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
466 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
467 return index;
468 }
469
470
471 IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
472 station = &priv->stations[index];
473 station->used = 1;
474 priv->num_stations++;
475
476 /* Set up the REPLY_ADD_STA command to send to device */
477 memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
478 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
479 station->sta.mode = 0;
480 station->sta.sta.sta_id = index;
481 station->sta.station_flags = 0;
482
483 #ifdef CONFIG_IWL4965_HT
484 /* BCAST station and IBSS stations do not work in HT mode */
485 if (index != priv->hw_setting.bcast_sta_id &&
486 priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
487 iwl4965_set_ht_add_station(priv, index,
488 (struct ieee80211_ht_info *) ht_data);
489 #endif /*CONFIG_IWL4965_HT*/
490
491 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
492
493 /* Add station to device's station table */
494 iwl4965_send_add_station(priv, &station->sta, flags);
495 return index;
496
497 }
498
499 /*************** DRIVER STATUS FUNCTIONS *****/
500
501 static inline int iwl4965_is_ready(struct iwl_priv *priv)
502 {
503 /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
504 * set but EXIT_PENDING is not */
505 return test_bit(STATUS_READY, &priv->status) &&
506 test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
507 !test_bit(STATUS_EXIT_PENDING, &priv->status);
508 }
509
510 static inline int iwl4965_is_alive(struct iwl_priv *priv)
511 {
512 return test_bit(STATUS_ALIVE, &priv->status);
513 }
514
515 static inline int iwl4965_is_init(struct iwl_priv *priv)
516 {
517 return test_bit(STATUS_INIT, &priv->status);
518 }
519
520 static inline int iwl4965_is_rfkill(struct iwl_priv *priv)
521 {
522 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
523 test_bit(STATUS_RF_KILL_SW, &priv->status);
524 }
525
526 static inline int iwl4965_is_ready_rf(struct iwl_priv *priv)
527 {
528
529 if (iwl4965_is_rfkill(priv))
530 return 0;
531
532 return iwl4965_is_ready(priv);
533 }
534
535 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
536
537 /**
538 * iwl4965_enqueue_hcmd - enqueue a uCode command
539 * @priv: device private data point
540 * @cmd: a point to the ucode command structure
541 *
542 * The function returns < 0 values to indicate the operation is
543 * failed. On success, it turns the index (> 0) of command in the
544 * command queue.
545 */
546 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
547 {
548 struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
549 struct iwl4965_queue *q = &txq->q;
550 struct iwl4965_tfd_frame *tfd;
551 u32 *control_flags;
552 struct iwl_cmd *out_cmd;
553 u32 idx;
554 u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
555 dma_addr_t phys_addr;
556 int ret;
557 unsigned long flags;
558
559 /* If any of the command structures end up being larger than
560 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
561 * we will need to increase the size of the TFD entries */
562 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
563 !(cmd->meta.flags & CMD_SIZE_HUGE));
564
565 if (iwl4965_is_rfkill(priv)) {
566 IWL_DEBUG_INFO("Not sending command - RF KILL");
567 return -EIO;
568 }
569
570 if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
571 IWL_ERROR("No space for Tx\n");
572 return -ENOSPC;
573 }
574
575 spin_lock_irqsave(&priv->hcmd_lock, flags);
576
577 tfd = &txq->bd[q->write_ptr];
578 memset(tfd, 0, sizeof(*tfd));
579
580 control_flags = (u32 *) tfd;
581
582 idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
583 out_cmd = &txq->cmd[idx];
584
585 out_cmd->hdr.cmd = cmd->id;
586 memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
587 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
588
589 /* At this point, the out_cmd now has all of the incoming cmd
590 * information */
591
592 out_cmd->hdr.flags = 0;
593 out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
594 INDEX_TO_SEQ(q->write_ptr));
595 if (out_cmd->meta.flags & CMD_SIZE_HUGE)
596 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
597
598 phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
599 offsetof(struct iwl_cmd, hdr);
600 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
601
602 IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
603 "%d bytes at %d[%d]:%d\n",
604 get_cmd_string(out_cmd->hdr.cmd),
605 out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
606 fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
607
608 txq->need_update = 1;
609
610 /* Set up entry in queue's byte count circular buffer */
611 ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
612
613 /* Increment and update queue's write index */
614 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
615 iwl4965_tx_queue_update_write_ptr(priv, txq);
616
617 spin_unlock_irqrestore(&priv->hcmd_lock, flags);
618 return ret ? ret : idx;
619 }
620
621 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
622 {
623 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
624
625 if (hw_decrypt)
626 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
627 else
628 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
629
630 }
631
632 int iwl4965_send_statistics_request(struct iwl_priv *priv)
633 {
634 u32 flags = 0;
635 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
636 sizeof(flags), &flags);
637 }
638
639 /**
640 * iwl4965_rxon_add_station - add station into station table.
641 *
642 * there is only one AP station with id= IWL_AP_ID
643 * NOTE: mutex must be held before calling this fnction
644 */
645 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
646 const u8 *addr, int is_ap)
647 {
648 u8 sta_id;
649
650 /* Add station to device's station table */
651 #ifdef CONFIG_IWL4965_HT
652 struct ieee80211_conf *conf = &priv->hw->conf;
653 struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
654
655 if ((is_ap) &&
656 (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
657 (priv->iw_mode == IEEE80211_IF_TYPE_STA))
658 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
659 0, cur_ht_config);
660 else
661 #endif /* CONFIG_IWL4965_HT */
662 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
663 0, NULL);
664
665 /* Set up default rate scaling table in device's station table */
666 iwl4965_add_station(priv, addr, is_ap);
667
668 return sta_id;
669 }
670
671 /**
672 * iwl4965_check_rxon_cmd - validate RXON structure is valid
673 *
674 * NOTE: This is really only useful during development and can eventually
675 * be #ifdef'd out once the driver is stable and folks aren't actively
676 * making changes
677 */
678 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
679 {
680 int error = 0;
681 int counter = 1;
682
683 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
684 error |= le32_to_cpu(rxon->flags &
685 (RXON_FLG_TGJ_NARROW_BAND_MSK |
686 RXON_FLG_RADAR_DETECT_MSK));
687 if (error)
688 IWL_WARNING("check 24G fields %d | %d\n",
689 counter++, error);
690 } else {
691 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
692 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
693 if (error)
694 IWL_WARNING("check 52 fields %d | %d\n",
695 counter++, error);
696 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
697 if (error)
698 IWL_WARNING("check 52 CCK %d | %d\n",
699 counter++, error);
700 }
701 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
702 if (error)
703 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
704
705 /* make sure basic rates 6Mbps and 1Mbps are supported */
706 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
707 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
708 if (error)
709 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
710
711 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
712 if (error)
713 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
714
715 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
716 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
717 if (error)
718 IWL_WARNING("check CCK and short slot %d | %d\n",
719 counter++, error);
720
721 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
722 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
723 if (error)
724 IWL_WARNING("check CCK & auto detect %d | %d\n",
725 counter++, error);
726
727 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
728 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
729 if (error)
730 IWL_WARNING("check TGG and auto detect %d | %d\n",
731 counter++, error);
732
733 if (error)
734 IWL_WARNING("Tuning to channel %d\n",
735 le16_to_cpu(rxon->channel));
736
737 if (error) {
738 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
739 return -1;
740 }
741 return 0;
742 }
743
744 /**
745 * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
746 * @priv: staging_rxon is compared to active_rxon
747 *
748 * If the RXON structure is changing enough to require a new tune,
749 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
750 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
751 */
752 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
753 {
754
755 /* These items are only settable from the full RXON command */
756 if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
757 compare_ether_addr(priv->staging_rxon.bssid_addr,
758 priv->active_rxon.bssid_addr) ||
759 compare_ether_addr(priv->staging_rxon.node_addr,
760 priv->active_rxon.node_addr) ||
761 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
762 priv->active_rxon.wlap_bssid_addr) ||
763 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
764 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
765 (priv->staging_rxon.air_propagation !=
766 priv->active_rxon.air_propagation) ||
767 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
768 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
769 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
770 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
771 (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
772 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
773 return 1;
774
775 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
776 * be updated with the RXON_ASSOC command -- however only some
777 * flag transitions are allowed using RXON_ASSOC */
778
779 /* Check if we are not switching bands */
780 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
781 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
782 return 1;
783
784 /* Check if we are switching association toggle */
785 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
786 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
787 return 1;
788
789 return 0;
790 }
791
792 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
793 {
794 int rc = 0;
795 struct iwl4965_rx_packet *res = NULL;
796 struct iwl4965_rxon_assoc_cmd rxon_assoc;
797 struct iwl_host_cmd cmd = {
798 .id = REPLY_RXON_ASSOC,
799 .len = sizeof(rxon_assoc),
800 .meta.flags = CMD_WANT_SKB,
801 .data = &rxon_assoc,
802 };
803 const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
804 const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
805
806 if ((rxon1->flags == rxon2->flags) &&
807 (rxon1->filter_flags == rxon2->filter_flags) &&
808 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
809 (rxon1->ofdm_ht_single_stream_basic_rates ==
810 rxon2->ofdm_ht_single_stream_basic_rates) &&
811 (rxon1->ofdm_ht_dual_stream_basic_rates ==
812 rxon2->ofdm_ht_dual_stream_basic_rates) &&
813 (rxon1->rx_chain == rxon2->rx_chain) &&
814 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
815 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
816 return 0;
817 }
818
819 rxon_assoc.flags = priv->staging_rxon.flags;
820 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
821 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
822 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
823 rxon_assoc.reserved = 0;
824 rxon_assoc.ofdm_ht_single_stream_basic_rates =
825 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
826 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
827 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
828 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
829
830 rc = iwl_send_cmd_sync(priv, &cmd);
831 if (rc)
832 return rc;
833
834 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
835 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
836 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
837 rc = -EIO;
838 }
839
840 priv->alloc_rxb_skb--;
841 dev_kfree_skb_any(cmd.meta.u.skb);
842
843 return rc;
844 }
845
846 /**
847 * iwl4965_commit_rxon - commit staging_rxon to hardware
848 *
849 * The RXON command in staging_rxon is committed to the hardware and
850 * the active_rxon structure is updated with the new data. This
851 * function correctly transitions out of the RXON_ASSOC_MSK state if
852 * a HW tune is required based on the RXON structure changes.
853 */
854 static int iwl4965_commit_rxon(struct iwl_priv *priv)
855 {
856 /* cast away the const for active_rxon in this function */
857 struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
858 DECLARE_MAC_BUF(mac);
859 int rc = 0;
860
861 if (!iwl4965_is_alive(priv))
862 return -1;
863
864 /* always get timestamp with Rx frame */
865 priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
866
867 rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
868 if (rc) {
869 IWL_ERROR("Invalid RXON configuration. Not committing.\n");
870 return -EINVAL;
871 }
872
873 /* If we don't need to send a full RXON, we can use
874 * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
875 * and other flags for the current radio configuration. */
876 if (!iwl4965_full_rxon_required(priv)) {
877 rc = iwl4965_send_rxon_assoc(priv);
878 if (rc) {
879 IWL_ERROR("Error setting RXON_ASSOC "
880 "configuration (%d).\n", rc);
881 return rc;
882 }
883
884 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
885
886 return 0;
887 }
888
889 /* station table will be cleared */
890 priv->assoc_station_added = 0;
891
892 #ifdef CONFIG_IWL4965_SENSITIVITY
893 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
894 if (!priv->error_recovering)
895 priv->start_calib = 0;
896
897 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
898 #endif /* CONFIG_IWL4965_SENSITIVITY */
899
900 /* If we are currently associated and the new config requires
901 * an RXON_ASSOC and the new config wants the associated mask enabled,
902 * we must clear the associated from the active configuration
903 * before we apply the new config */
904 if (iwl4965_is_associated(priv) &&
905 (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
906 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
907 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
908
909 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
910 sizeof(struct iwl4965_rxon_cmd),
911 &priv->active_rxon);
912
913 /* If the mask clearing failed then we set
914 * active_rxon back to what it was previously */
915 if (rc) {
916 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
917 IWL_ERROR("Error clearing ASSOC_MSK on current "
918 "configuration (%d).\n", rc);
919 return rc;
920 }
921 }
922
923 IWL_DEBUG_INFO("Sending RXON\n"
924 "* with%s RXON_FILTER_ASSOC_MSK\n"
925 "* channel = %d\n"
926 "* bssid = %s\n",
927 ((priv->staging_rxon.filter_flags &
928 RXON_FILTER_ASSOC_MSK) ? "" : "out"),
929 le16_to_cpu(priv->staging_rxon.channel),
930 print_mac(mac, priv->staging_rxon.bssid_addr));
931
932 iwl4965_set_rxon_hwcrypto(priv, priv->cfg->mod_params->hw_crypto);
933 /* Apply the new configuration */
934 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
935 sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
936 if (rc) {
937 IWL_ERROR("Error setting new configuration (%d).\n", rc);
938 return rc;
939 }
940
941 iwlcore_clear_stations_table(priv);
942
943 #ifdef CONFIG_IWL4965_SENSITIVITY
944 if (!priv->error_recovering)
945 priv->start_calib = 0;
946
947 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
948 iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
949 #endif /* CONFIG_IWL4965_SENSITIVITY */
950
951 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
952
953 /* If we issue a new RXON command which required a tune then we must
954 * send a new TXPOWER command or we won't be able to Tx any frames */
955 rc = iwl4965_hw_reg_send_txpower(priv);
956 if (rc) {
957 IWL_ERROR("Error setting Tx power (%d).\n", rc);
958 return rc;
959 }
960
961 /* Add the broadcast address so we can send broadcast frames */
962 if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
963 IWL_INVALID_STATION) {
964 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
965 return -EIO;
966 }
967
968 /* If we have set the ASSOC_MSK and we are in BSS mode then
969 * add the IWL_AP_ID to the station rate table */
970 if (iwl4965_is_associated(priv) &&
971 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
972 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
973 == IWL_INVALID_STATION) {
974 IWL_ERROR("Error adding AP address for transmit.\n");
975 return -EIO;
976 }
977 priv->assoc_station_added = 1;
978 }
979
980 return 0;
981 }
982
983 static int iwl4965_send_bt_config(struct iwl_priv *priv)
984 {
985 struct iwl4965_bt_cmd bt_cmd = {
986 .flags = 3,
987 .lead_time = 0xAA,
988 .max_kill = 1,
989 .kill_ack_mask = 0,
990 .kill_cts_mask = 0,
991 };
992
993 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
994 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
995 }
996
997 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
998 {
999 int rc = 0;
1000 struct iwl4965_rx_packet *res;
1001 struct iwl_host_cmd cmd = {
1002 .id = REPLY_SCAN_ABORT_CMD,
1003 .meta.flags = CMD_WANT_SKB,
1004 };
1005
1006 /* If there isn't a scan actively going on in the hardware
1007 * then we are in between scan bands and not actually
1008 * actively scanning, so don't send the abort command */
1009 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1010 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1011 return 0;
1012 }
1013
1014 rc = iwl_send_cmd_sync(priv, &cmd);
1015 if (rc) {
1016 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1017 return rc;
1018 }
1019
1020 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1021 if (res->u.status != CAN_ABORT_STATUS) {
1022 /* The scan abort will return 1 for success or
1023 * 2 for "failure". A failure condition can be
1024 * due to simply not being in an active scan which
1025 * can occur if we send the scan abort before we
1026 * the microcode has notified us that a scan is
1027 * completed. */
1028 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1029 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1030 clear_bit(STATUS_SCAN_HW, &priv->status);
1031 }
1032
1033 dev_kfree_skb_any(cmd.meta.u.skb);
1034
1035 return rc;
1036 }
1037
1038 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
1039 struct iwl_cmd *cmd,
1040 struct sk_buff *skb)
1041 {
1042 return 1;
1043 }
1044
1045 /*
1046 * CARD_STATE_CMD
1047 *
1048 * Use: Sets the device's internal card state to enable, disable, or halt
1049 *
1050 * When in the 'enable' state the card operates as normal.
1051 * When in the 'disable' state, the card enters into a low power mode.
1052 * When in the 'halt' state, the card is shut down and must be fully
1053 * restarted to come back on.
1054 */
1055 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1056 {
1057 struct iwl_host_cmd cmd = {
1058 .id = REPLY_CARD_STATE_CMD,
1059 .len = sizeof(u32),
1060 .data = &flags,
1061 .meta.flags = meta_flag,
1062 };
1063
1064 if (meta_flag & CMD_ASYNC)
1065 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1066
1067 return iwl_send_cmd(priv, &cmd);
1068 }
1069
1070 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
1071 struct iwl_cmd *cmd, struct sk_buff *skb)
1072 {
1073 struct iwl4965_rx_packet *res = NULL;
1074
1075 if (!skb) {
1076 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1077 return 1;
1078 }
1079
1080 res = (struct iwl4965_rx_packet *)skb->data;
1081 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1082 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1083 res->hdr.flags);
1084 return 1;
1085 }
1086
1087 switch (res->u.add_sta.status) {
1088 case ADD_STA_SUCCESS_MSK:
1089 break;
1090 default:
1091 break;
1092 }
1093
1094 /* We didn't cache the SKB; let the caller free it */
1095 return 1;
1096 }
1097
1098 int iwl4965_send_add_station(struct iwl_priv *priv,
1099 struct iwl4965_addsta_cmd *sta, u8 flags)
1100 {
1101 struct iwl4965_rx_packet *res = NULL;
1102 int rc = 0;
1103 struct iwl_host_cmd cmd = {
1104 .id = REPLY_ADD_STA,
1105 .len = sizeof(struct iwl4965_addsta_cmd),
1106 .meta.flags = flags,
1107 .data = sta,
1108 };
1109
1110 if (flags & CMD_ASYNC)
1111 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1112 else
1113 cmd.meta.flags |= CMD_WANT_SKB;
1114
1115 rc = iwl_send_cmd(priv, &cmd);
1116
1117 if (rc || (flags & CMD_ASYNC))
1118 return rc;
1119
1120 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1121 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1122 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1123 res->hdr.flags);
1124 rc = -EIO;
1125 }
1126
1127 if (rc == 0) {
1128 switch (res->u.add_sta.status) {
1129 case ADD_STA_SUCCESS_MSK:
1130 IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1131 break;
1132 default:
1133 rc = -EIO;
1134 IWL_WARNING("REPLY_ADD_STA failed\n");
1135 break;
1136 }
1137 }
1138
1139 priv->alloc_rxb_skb--;
1140 dev_kfree_skb_any(cmd.meta.u.skb);
1141
1142 return rc;
1143 }
1144
1145 static int iwl4965_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
1146 struct ieee80211_key_conf *keyconf,
1147 u8 sta_id)
1148 {
1149 unsigned long flags;
1150 __le16 key_flags = 0;
1151
1152 key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
1153 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1154
1155 if (sta_id == priv->hw_setting.bcast_sta_id)
1156 key_flags |= STA_KEY_MULTICAST_MSK;
1157
1158 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1159 keyconf->hw_key_idx = keyconf->keyidx;
1160
1161 key_flags &= ~STA_KEY_FLG_INVALID;
1162
1163 spin_lock_irqsave(&priv->sta_lock, flags);
1164 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1165 priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1166
1167 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1168 keyconf->keylen);
1169
1170 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1171 keyconf->keylen);
1172
1173 priv->stations[sta_id].sta.key.key_offset
1174 = (sta_id % STA_KEY_MAX_NUM);/*FIXME*/
1175 priv->stations[sta_id].sta.key.key_flags = key_flags;
1176 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1177 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1178
1179 spin_unlock_irqrestore(&priv->sta_lock, flags);
1180
1181 IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1182 return iwl4965_send_add_station(priv,
1183 &priv->stations[sta_id].sta, CMD_ASYNC);
1184 }
1185
1186 static int iwl4965_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1187 struct ieee80211_key_conf *keyconf,
1188 u8 sta_id)
1189 {
1190 unsigned long flags;
1191 int ret = 0;
1192
1193 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1194 keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1195 keyconf->hw_key_idx = keyconf->keyidx;
1196
1197 spin_lock_irqsave(&priv->sta_lock, flags);
1198
1199 priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1200 priv->stations[sta_id].keyinfo.conf = keyconf;
1201 priv->stations[sta_id].keyinfo.keylen = 16;
1202
1203 /* This copy is acutally not needed: we get the key with each TX */
1204 memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1205
1206 memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1207
1208 spin_unlock_irqrestore(&priv->sta_lock, flags);
1209
1210 return ret;
1211 }
1212
1213 static int iwl4965_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1214 {
1215 unsigned long flags;
1216
1217 spin_lock_irqsave(&priv->sta_lock, flags);
1218 memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1219 memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1220 priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1221 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1222 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1223 spin_unlock_irqrestore(&priv->sta_lock, flags);
1224
1225 IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1226 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1227 return 0;
1228 }
1229
1230 static int iwl4965_set_dynamic_key(struct iwl_priv *priv,
1231 struct ieee80211_key_conf *key, u8 sta_id)
1232 {
1233 int ret;
1234
1235 switch (key->alg) {
1236 case ALG_CCMP:
1237 ret = iwl4965_set_ccmp_dynamic_key_info(priv, key, sta_id);
1238 break;
1239 case ALG_TKIP:
1240 ret = iwl4965_set_tkip_dynamic_key_info(priv, key, sta_id);
1241 break;
1242 case ALG_WEP:
1243 ret = -EOPNOTSUPP;
1244 break;
1245 default:
1246 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
1247 ret = -EINVAL;
1248 }
1249
1250 return ret;
1251 }
1252
1253 static int iwl4965_remove_static_key(struct iwl_priv *priv)
1254 {
1255 int ret = -EOPNOTSUPP;
1256
1257 return ret;
1258 }
1259
1260 static int iwl4965_set_static_key(struct iwl_priv *priv,
1261 struct ieee80211_key_conf *key)
1262 {
1263 if (key->alg == ALG_WEP)
1264 return -EOPNOTSUPP;
1265
1266 IWL_ERROR("Static key invalid: alg %d\n", key->alg);
1267 return -EINVAL;
1268 }
1269
1270 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1271 {
1272 struct list_head *element;
1273
1274 IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1275 priv->frames_count);
1276
1277 while (!list_empty(&priv->free_frames)) {
1278 element = priv->free_frames.next;
1279 list_del(element);
1280 kfree(list_entry(element, struct iwl4965_frame, list));
1281 priv->frames_count--;
1282 }
1283
1284 if (priv->frames_count) {
1285 IWL_WARNING("%d frames still in use. Did we lose one?\n",
1286 priv->frames_count);
1287 priv->frames_count = 0;
1288 }
1289 }
1290
1291 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1292 {
1293 struct iwl4965_frame *frame;
1294 struct list_head *element;
1295 if (list_empty(&priv->free_frames)) {
1296 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1297 if (!frame) {
1298 IWL_ERROR("Could not allocate frame!\n");
1299 return NULL;
1300 }
1301
1302 priv->frames_count++;
1303 return frame;
1304 }
1305
1306 element = priv->free_frames.next;
1307 list_del(element);
1308 return list_entry(element, struct iwl4965_frame, list);
1309 }
1310
1311 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1312 {
1313 memset(frame, 0, sizeof(*frame));
1314 list_add(&frame->list, &priv->free_frames);
1315 }
1316
1317 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1318 struct ieee80211_hdr *hdr,
1319 const u8 *dest, int left)
1320 {
1321
1322 if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1323 ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1324 (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1325 return 0;
1326
1327 if (priv->ibss_beacon->len > left)
1328 return 0;
1329
1330 memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1331
1332 return priv->ibss_beacon->len;
1333 }
1334
1335 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1336 {
1337 u8 i;
1338
1339 for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1340 i = iwl4965_rates[i].next_ieee) {
1341 if (rate_mask & (1 << i))
1342 return iwl4965_rates[i].plcp;
1343 }
1344
1345 return IWL_RATE_INVALID;
1346 }
1347
1348 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1349 {
1350 struct iwl4965_frame *frame;
1351 unsigned int frame_size;
1352 int rc;
1353 u8 rate;
1354
1355 frame = iwl4965_get_free_frame(priv);
1356
1357 if (!frame) {
1358 IWL_ERROR("Could not obtain free frame buffer for beacon "
1359 "command.\n");
1360 return -ENOMEM;
1361 }
1362
1363 if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1364 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1365 0xFF0);
1366 if (rate == IWL_INVALID_RATE)
1367 rate = IWL_RATE_6M_PLCP;
1368 } else {
1369 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1370 if (rate == IWL_INVALID_RATE)
1371 rate = IWL_RATE_1M_PLCP;
1372 }
1373
1374 frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1375
1376 rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1377 &frame->u.cmd[0]);
1378
1379 iwl4965_free_frame(priv, frame);
1380
1381 return rc;
1382 }
1383
1384 /******************************************************************************
1385 *
1386 * Misc. internal state and helper functions
1387 *
1388 ******************************************************************************/
1389
1390 static void iwl4965_unset_hw_setting(struct iwl_priv *priv)
1391 {
1392 if (priv->hw_setting.shared_virt)
1393 pci_free_consistent(priv->pci_dev,
1394 sizeof(struct iwl4965_shared),
1395 priv->hw_setting.shared_virt,
1396 priv->hw_setting.shared_phys);
1397 }
1398
1399 /**
1400 * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1401 *
1402 * return : set the bit for each supported rate insert in ie
1403 */
1404 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1405 u16 basic_rate, int *left)
1406 {
1407 u16 ret_rates = 0, bit;
1408 int i;
1409 u8 *cnt = ie;
1410 u8 *rates = ie + 1;
1411
1412 for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1413 if (bit & supported_rate) {
1414 ret_rates |= bit;
1415 rates[*cnt] = iwl4965_rates[i].ieee |
1416 ((bit & basic_rate) ? 0x80 : 0x00);
1417 (*cnt)++;
1418 (*left)--;
1419 if ((*left <= 0) ||
1420 (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1421 break;
1422 }
1423 }
1424
1425 return ret_rates;
1426 }
1427
1428 /**
1429 * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1430 */
1431 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1432 enum ieee80211_band band,
1433 struct ieee80211_mgmt *frame,
1434 int left, int is_direct)
1435 {
1436 int len = 0;
1437 u8 *pos = NULL;
1438 u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1439 #ifdef CONFIG_IWL4965_HT
1440 const struct ieee80211_supported_band *sband =
1441 iwl4965_get_hw_mode(priv, band);
1442 #endif /* CONFIG_IWL4965_HT */
1443
1444 /* Make sure there is enough space for the probe request,
1445 * two mandatory IEs and the data */
1446 left -= 24;
1447 if (left < 0)
1448 return 0;
1449 len += 24;
1450
1451 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1452 memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1453 memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1454 memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1455 frame->seq_ctrl = 0;
1456
1457 /* fill in our indirect SSID IE */
1458 /* ...next IE... */
1459
1460 left -= 2;
1461 if (left < 0)
1462 return 0;
1463 len += 2;
1464 pos = &(frame->u.probe_req.variable[0]);
1465 *pos++ = WLAN_EID_SSID;
1466 *pos++ = 0;
1467
1468 /* fill in our direct SSID IE... */
1469 if (is_direct) {
1470 /* ...next IE... */
1471 left -= 2 + priv->essid_len;
1472 if (left < 0)
1473 return 0;
1474 /* ... fill it in... */
1475 *pos++ = WLAN_EID_SSID;
1476 *pos++ = priv->essid_len;
1477 memcpy(pos, priv->essid, priv->essid_len);
1478 pos += priv->essid_len;
1479 len += 2 + priv->essid_len;
1480 }
1481
1482 /* fill in supported rate */
1483 /* ...next IE... */
1484 left -= 2;
1485 if (left < 0)
1486 return 0;
1487
1488 /* ... fill it in... */
1489 *pos++ = WLAN_EID_SUPP_RATES;
1490 *pos = 0;
1491
1492 /* exclude 60M rate */
1493 active_rates = priv->rates_mask;
1494 active_rates &= ~IWL_RATE_60M_MASK;
1495
1496 active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1497
1498 cck_rates = IWL_CCK_RATES_MASK & active_rates;
1499 ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1500 active_rate_basic, &left);
1501 active_rates &= ~ret_rates;
1502
1503 ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1504 active_rate_basic, &left);
1505 active_rates &= ~ret_rates;
1506
1507 len += 2 + *pos;
1508 pos += (*pos) + 1;
1509 if (active_rates == 0)
1510 goto fill_end;
1511
1512 /* fill in supported extended rate */
1513 /* ...next IE... */
1514 left -= 2;
1515 if (left < 0)
1516 return 0;
1517 /* ... fill it in... */
1518 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1519 *pos = 0;
1520 iwl4965_supported_rate_to_ie(pos, active_rates,
1521 active_rate_basic, &left);
1522 if (*pos > 0)
1523 len += 2 + *pos;
1524
1525 #ifdef CONFIG_IWL4965_HT
1526 if (sband && sband->ht_info.ht_supported) {
1527 struct ieee80211_ht_cap *ht_cap;
1528 pos += (*pos) + 1;
1529 *pos++ = WLAN_EID_HT_CAPABILITY;
1530 *pos++ = sizeof(struct ieee80211_ht_cap);
1531 ht_cap = (struct ieee80211_ht_cap *)pos;
1532 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1533 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1534 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1535 IEEE80211_HT_CAP_AMPDU_FACTOR) |
1536 ((sband->ht_info.ampdu_density << 2) &
1537 IEEE80211_HT_CAP_AMPDU_DENSITY);
1538 len += 2 + sizeof(struct ieee80211_ht_cap);
1539 }
1540 #endif /*CONFIG_IWL4965_HT */
1541
1542 fill_end:
1543 return (u16)len;
1544 }
1545
1546 /*
1547 * QoS support
1548 */
1549 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1550 struct iwl4965_qosparam_cmd *qos)
1551 {
1552
1553 return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1554 sizeof(struct iwl4965_qosparam_cmd), qos);
1555 }
1556
1557 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1558 {
1559 unsigned long flags;
1560
1561 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1562 return;
1563
1564 if (!priv->qos_data.qos_enable)
1565 return;
1566
1567 spin_lock_irqsave(&priv->lock, flags);
1568 priv->qos_data.def_qos_parm.qos_flags = 0;
1569
1570 if (priv->qos_data.qos_cap.q_AP.queue_request &&
1571 !priv->qos_data.qos_cap.q_AP.txop_request)
1572 priv->qos_data.def_qos_parm.qos_flags |=
1573 QOS_PARAM_FLG_TXOP_TYPE_MSK;
1574 if (priv->qos_data.qos_active)
1575 priv->qos_data.def_qos_parm.qos_flags |=
1576 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1577
1578 #ifdef CONFIG_IWL4965_HT
1579 if (priv->current_ht_config.is_ht)
1580 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1581 #endif /* CONFIG_IWL4965_HT */
1582
1583 spin_unlock_irqrestore(&priv->lock, flags);
1584
1585 if (force || iwl4965_is_associated(priv)) {
1586 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1587 priv->qos_data.qos_active,
1588 priv->qos_data.def_qos_parm.qos_flags);
1589
1590 iwl4965_send_qos_params_command(priv,
1591 &(priv->qos_data.def_qos_parm));
1592 }
1593 }
1594
1595 /*
1596 * Power management (not Tx power!) functions
1597 */
1598 #define MSEC_TO_USEC 1024
1599
1600 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1601 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1602 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1603 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1604 __constant_cpu_to_le32(X1), \
1605 __constant_cpu_to_le32(X2), \
1606 __constant_cpu_to_le32(X3), \
1607 __constant_cpu_to_le32(X4)}
1608
1609
1610 /* default power management (not Tx power) table values */
1611 /* for tim 0-10 */
1612 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1613 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1614 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1615 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1616 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1617 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1618 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1619 };
1620
1621 /* for tim > 10 */
1622 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1623 {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1624 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1625 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1626 {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1627 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1628 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1629 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1630 {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1631 {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1632 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1633 };
1634
1635 int iwl4965_power_init_handle(struct iwl_priv *priv)
1636 {
1637 int rc = 0, i;
1638 struct iwl4965_power_mgr *pow_data;
1639 int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1640 u16 pci_pm;
1641
1642 IWL_DEBUG_POWER("Initialize power \n");
1643
1644 pow_data = &(priv->power_data);
1645
1646 memset(pow_data, 0, sizeof(*pow_data));
1647
1648 pow_data->active_index = IWL_POWER_RANGE_0;
1649 pow_data->dtim_val = 0xffff;
1650
1651 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1652 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1653
1654 rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1655 if (rc != 0)
1656 return 0;
1657 else {
1658 struct iwl4965_powertable_cmd *cmd;
1659
1660 IWL_DEBUG_POWER("adjust power command flags\n");
1661
1662 for (i = 0; i < IWL_POWER_AC; i++) {
1663 cmd = &pow_data->pwr_range_0[i].cmd;
1664
1665 if (pci_pm & 0x1)
1666 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1667 else
1668 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1669 }
1670 }
1671 return rc;
1672 }
1673
1674 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1675 struct iwl4965_powertable_cmd *cmd, u32 mode)
1676 {
1677 int rc = 0, i;
1678 u8 skip;
1679 u32 max_sleep = 0;
1680 struct iwl4965_power_vec_entry *range;
1681 u8 period = 0;
1682 struct iwl4965_power_mgr *pow_data;
1683
1684 if (mode > IWL_POWER_INDEX_5) {
1685 IWL_DEBUG_POWER("Error invalid power mode \n");
1686 return -1;
1687 }
1688 pow_data = &(priv->power_data);
1689
1690 if (pow_data->active_index == IWL_POWER_RANGE_0)
1691 range = &pow_data->pwr_range_0[0];
1692 else
1693 range = &pow_data->pwr_range_1[1];
1694
1695 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1696
1697 #ifdef IWL_MAC80211_DISABLE
1698 if (priv->assoc_network != NULL) {
1699 unsigned long flags;
1700
1701 period = priv->assoc_network->tim.tim_period;
1702 }
1703 #endif /*IWL_MAC80211_DISABLE */
1704 skip = range[mode].no_dtim;
1705
1706 if (period == 0) {
1707 period = 1;
1708 skip = 0;
1709 }
1710
1711 if (skip == 0) {
1712 max_sleep = period;
1713 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1714 } else {
1715 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1716 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1717 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1718 }
1719
1720 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1721 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1722 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1723 }
1724
1725 IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1726 IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1727 IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1728 IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1729 le32_to_cpu(cmd->sleep_interval[0]),
1730 le32_to_cpu(cmd->sleep_interval[1]),
1731 le32_to_cpu(cmd->sleep_interval[2]),
1732 le32_to_cpu(cmd->sleep_interval[3]),
1733 le32_to_cpu(cmd->sleep_interval[4]));
1734
1735 return rc;
1736 }
1737
1738 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1739 {
1740 u32 uninitialized_var(final_mode);
1741 int rc;
1742 struct iwl4965_powertable_cmd cmd;
1743
1744 /* If on battery, set to 3,
1745 * if plugged into AC power, set to CAM ("continuously aware mode"),
1746 * else user level */
1747 switch (mode) {
1748 case IWL_POWER_BATTERY:
1749 final_mode = IWL_POWER_INDEX_3;
1750 break;
1751 case IWL_POWER_AC:
1752 final_mode = IWL_POWER_MODE_CAM;
1753 break;
1754 default:
1755 final_mode = mode;
1756 break;
1757 }
1758
1759 cmd.keep_alive_beacons = 0;
1760
1761 iwl4965_update_power_cmd(priv, &cmd, final_mode);
1762
1763 rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1764
1765 if (final_mode == IWL_POWER_MODE_CAM)
1766 clear_bit(STATUS_POWER_PMI, &priv->status);
1767 else
1768 set_bit(STATUS_POWER_PMI, &priv->status);
1769
1770 return rc;
1771 }
1772
1773 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1774 {
1775 /* Filter incoming packets to determine if they are targeted toward
1776 * this network, discarding packets coming from ourselves */
1777 switch (priv->iw_mode) {
1778 case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source | BSSID */
1779 /* packets from our adapter are dropped (echo) */
1780 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1781 return 0;
1782 /* {broad,multi}cast packets to our IBSS go through */
1783 if (is_multicast_ether_addr(header->addr1))
1784 return !compare_ether_addr(header->addr3, priv->bssid);
1785 /* packets to our adapter go through */
1786 return !compare_ether_addr(header->addr1, priv->mac_addr);
1787 case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1788 /* packets from our adapter are dropped (echo) */
1789 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1790 return 0;
1791 /* {broad,multi}cast packets to our BSS go through */
1792 if (is_multicast_ether_addr(header->addr1))
1793 return !compare_ether_addr(header->addr2, priv->bssid);
1794 /* packets to our adapter go through */
1795 return !compare_ether_addr(header->addr1, priv->mac_addr);
1796 default:
1797 break;
1798 }
1799
1800 return 1;
1801 }
1802
1803 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1804
1805 static const char *iwl4965_get_tx_fail_reason(u32 status)
1806 {
1807 switch (status & TX_STATUS_MSK) {
1808 case TX_STATUS_SUCCESS:
1809 return "SUCCESS";
1810 TX_STATUS_ENTRY(SHORT_LIMIT);
1811 TX_STATUS_ENTRY(LONG_LIMIT);
1812 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1813 TX_STATUS_ENTRY(MGMNT_ABORT);
1814 TX_STATUS_ENTRY(NEXT_FRAG);
1815 TX_STATUS_ENTRY(LIFE_EXPIRE);
1816 TX_STATUS_ENTRY(DEST_PS);
1817 TX_STATUS_ENTRY(ABORTED);
1818 TX_STATUS_ENTRY(BT_RETRY);
1819 TX_STATUS_ENTRY(STA_INVALID);
1820 TX_STATUS_ENTRY(FRAG_DROPPED);
1821 TX_STATUS_ENTRY(TID_DISABLE);
1822 TX_STATUS_ENTRY(FRAME_FLUSHED);
1823 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1824 TX_STATUS_ENTRY(TX_LOCKED);
1825 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1826 }
1827
1828 return "UNKNOWN";
1829 }
1830
1831 /**
1832 * iwl4965_scan_cancel - Cancel any currently executing HW scan
1833 *
1834 * NOTE: priv->mutex is not required before calling this function
1835 */
1836 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1837 {
1838 if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1839 clear_bit(STATUS_SCANNING, &priv->status);
1840 return 0;
1841 }
1842
1843 if (test_bit(STATUS_SCANNING, &priv->status)) {
1844 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1845 IWL_DEBUG_SCAN("Queuing scan abort.\n");
1846 set_bit(STATUS_SCAN_ABORTING, &priv->status);
1847 queue_work(priv->workqueue, &priv->abort_scan);
1848
1849 } else
1850 IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1851
1852 return test_bit(STATUS_SCANNING, &priv->status);
1853 }
1854
1855 return 0;
1856 }
1857
1858 /**
1859 * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1860 * @ms: amount of time to wait (in milliseconds) for scan to abort
1861 *
1862 * NOTE: priv->mutex must be held before calling this function
1863 */
1864 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1865 {
1866 unsigned long now = jiffies;
1867 int ret;
1868
1869 ret = iwl4965_scan_cancel(priv);
1870 if (ret && ms) {
1871 mutex_unlock(&priv->mutex);
1872 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1873 test_bit(STATUS_SCANNING, &priv->status))
1874 msleep(1);
1875 mutex_lock(&priv->mutex);
1876
1877 return test_bit(STATUS_SCANNING, &priv->status);
1878 }
1879
1880 return ret;
1881 }
1882
1883 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1884 {
1885 /* Reset ieee stats */
1886
1887 /* We don't reset the net_device_stats (ieee->stats) on
1888 * re-association */
1889
1890 priv->last_seq_num = -1;
1891 priv->last_frag_num = -1;
1892 priv->last_packet_time = 0;
1893
1894 iwl4965_scan_cancel(priv);
1895 }
1896
1897 #define MAX_UCODE_BEACON_INTERVAL 4096
1898 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA)
1899
1900 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1901 {
1902 u16 new_val = 0;
1903 u16 beacon_factor = 0;
1904
1905 beacon_factor =
1906 (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1907 / MAX_UCODE_BEACON_INTERVAL;
1908 new_val = beacon_val / beacon_factor;
1909
1910 return cpu_to_le16(new_val);
1911 }
1912
1913 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1914 {
1915 u64 interval_tm_unit;
1916 u64 tsf, result;
1917 unsigned long flags;
1918 struct ieee80211_conf *conf = NULL;
1919 u16 beacon_int = 0;
1920
1921 conf = ieee80211_get_hw_conf(priv->hw);
1922
1923 spin_lock_irqsave(&priv->lock, flags);
1924 priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
1925 priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
1926
1927 priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1928
1929 tsf = priv->timestamp1;
1930 tsf = ((tsf << 32) | priv->timestamp0);
1931
1932 beacon_int = priv->beacon_int;
1933 spin_unlock_irqrestore(&priv->lock, flags);
1934
1935 if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1936 if (beacon_int == 0) {
1937 priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1938 priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1939 } else {
1940 priv->rxon_timing.beacon_interval =
1941 cpu_to_le16(beacon_int);
1942 priv->rxon_timing.beacon_interval =
1943 iwl4965_adjust_beacon_interval(
1944 le16_to_cpu(priv->rxon_timing.beacon_interval));
1945 }
1946
1947 priv->rxon_timing.atim_window = 0;
1948 } else {
1949 priv->rxon_timing.beacon_interval =
1950 iwl4965_adjust_beacon_interval(conf->beacon_int);
1951 /* TODO: we need to get atim_window from upper stack
1952 * for now we set to 0 */
1953 priv->rxon_timing.atim_window = 0;
1954 }
1955
1956 interval_tm_unit =
1957 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1958 result = do_div(tsf, interval_tm_unit);
1959 priv->rxon_timing.beacon_init_val =
1960 cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1961
1962 IWL_DEBUG_ASSOC
1963 ("beacon interval %d beacon timer %d beacon tim %d\n",
1964 le16_to_cpu(priv->rxon_timing.beacon_interval),
1965 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1966 le16_to_cpu(priv->rxon_timing.atim_window));
1967 }
1968
1969 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1970 {
1971 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1972 IWL_ERROR("APs don't scan.\n");
1973 return 0;
1974 }
1975
1976 if (!iwl4965_is_ready_rf(priv)) {
1977 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1978 return -EIO;
1979 }
1980
1981 if (test_bit(STATUS_SCANNING, &priv->status)) {
1982 IWL_DEBUG_SCAN("Scan already in progress.\n");
1983 return -EAGAIN;
1984 }
1985
1986 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1987 IWL_DEBUG_SCAN("Scan request while abort pending. "
1988 "Queuing.\n");
1989 return -EAGAIN;
1990 }
1991
1992 IWL_DEBUG_INFO("Starting scan...\n");
1993 priv->scan_bands = 2;
1994 set_bit(STATUS_SCANNING, &priv->status);
1995 priv->scan_start = jiffies;
1996 priv->scan_pass_start = priv->scan_start;
1997
1998 queue_work(priv->workqueue, &priv->request_scan);
1999
2000 return 0;
2001 }
2002
2003
2004 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
2005 enum ieee80211_band band)
2006 {
2007 if (band == IEEE80211_BAND_5GHZ) {
2008 priv->staging_rxon.flags &=
2009 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2010 | RXON_FLG_CCK_MSK);
2011 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2012 } else {
2013 /* Copied from iwl4965_bg_post_associate() */
2014 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2015 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2016 else
2017 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2018
2019 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2020 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2021
2022 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2023 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2024 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2025 }
2026 }
2027
2028 /*
2029 * initialize rxon structure with default values from eeprom
2030 */
2031 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
2032 {
2033 const struct iwl_channel_info *ch_info;
2034
2035 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2036
2037 switch (priv->iw_mode) {
2038 case IEEE80211_IF_TYPE_AP:
2039 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2040 break;
2041
2042 case IEEE80211_IF_TYPE_STA:
2043 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2044 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2045 break;
2046
2047 case IEEE80211_IF_TYPE_IBSS:
2048 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2049 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2050 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2051 RXON_FILTER_ACCEPT_GRP_MSK;
2052 break;
2053
2054 case IEEE80211_IF_TYPE_MNTR:
2055 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2056 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2057 RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2058 break;
2059 default:
2060 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2061 break;
2062 }
2063
2064 #if 0
2065 /* TODO: Figure out when short_preamble would be set and cache from
2066 * that */
2067 if (!hw_to_local(priv->hw)->short_preamble)
2068 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2069 else
2070 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2071 #endif
2072
2073 ch_info = iwl_get_channel_info(priv, priv->band,
2074 le16_to_cpu(priv->staging_rxon.channel));
2075
2076 if (!ch_info)
2077 ch_info = &priv->channel_info[0];
2078
2079 /*
2080 * in some case A channels are all non IBSS
2081 * in this case force B/G channel
2082 */
2083 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2084 !(is_channel_ibss(ch_info)))
2085 ch_info = &priv->channel_info[0];
2086
2087 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2088 priv->band = ch_info->band;
2089
2090 iwl4965_set_flags_for_phymode(priv, priv->band);
2091
2092 priv->staging_rxon.ofdm_basic_rates =
2093 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2094 priv->staging_rxon.cck_basic_rates =
2095 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2096
2097 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2098 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2099 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2100 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2101 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2102 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2103 iwl4965_set_rxon_chain(priv);
2104 }
2105
2106 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
2107 {
2108 if (mode == IEEE80211_IF_TYPE_IBSS) {
2109 const struct iwl_channel_info *ch_info;
2110
2111 ch_info = iwl_get_channel_info(priv,
2112 priv->band,
2113 le16_to_cpu(priv->staging_rxon.channel));
2114
2115 if (!ch_info || !is_channel_ibss(ch_info)) {
2116 IWL_ERROR("channel %d not IBSS channel\n",
2117 le16_to_cpu(priv->staging_rxon.channel));
2118 return -EINVAL;
2119 }
2120 }
2121
2122 priv->iw_mode = mode;
2123
2124 iwl4965_connection_init_rx_config(priv);
2125 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2126
2127 iwlcore_clear_stations_table(priv);
2128
2129 /* dont commit rxon if rf-kill is on*/
2130 if (!iwl4965_is_ready_rf(priv))
2131 return -EAGAIN;
2132
2133 cancel_delayed_work(&priv->scan_check);
2134 if (iwl4965_scan_cancel_timeout(priv, 100)) {
2135 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2136 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2137 return -EAGAIN;
2138 }
2139
2140 iwl4965_commit_rxon(priv);
2141
2142 return 0;
2143 }
2144
2145 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2146 struct ieee80211_tx_control *ctl,
2147 struct iwl_cmd *cmd,
2148 struct sk_buff *skb_frag,
2149 int sta_id)
2150 {
2151 struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
2152
2153 switch (keyinfo->alg) {
2154 case ALG_CCMP:
2155 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2156 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2157 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2158 cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
2159 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2160 break;
2161
2162 case ALG_TKIP:
2163 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2164 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
2165 IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
2166 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
2167 break;
2168
2169 case ALG_WEP:
2170 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2171 (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2172
2173 if (keyinfo->keylen == 13)
2174 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2175
2176 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2177
2178 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2179 "with key %d\n", ctl->key_idx);
2180 break;
2181
2182 default:
2183 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2184 break;
2185 }
2186 }
2187
2188 /*
2189 * handle build REPLY_TX command notification.
2190 */
2191 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
2192 struct iwl_cmd *cmd,
2193 struct ieee80211_tx_control *ctrl,
2194 struct ieee80211_hdr *hdr,
2195 int is_unicast, u8 std_id)
2196 {
2197 __le16 *qc;
2198 u16 fc = le16_to_cpu(hdr->frame_control);
2199 __le32 tx_flags = cmd->cmd.tx.tx_flags;
2200
2201 cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2202 if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2203 tx_flags |= TX_CMD_FLG_ACK_MSK;
2204 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2205 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2206 if (ieee80211_is_probe_response(fc) &&
2207 !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2208 tx_flags |= TX_CMD_FLG_TSF_MSK;
2209 } else {
2210 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2211 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2212 }
2213
2214 if (ieee80211_is_back_request(fc))
2215 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2216
2217
2218 cmd->cmd.tx.sta_id = std_id;
2219 if (ieee80211_get_morefrag(hdr))
2220 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2221
2222 qc = ieee80211_get_qos_ctrl(hdr);
2223 if (qc) {
2224 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2225 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2226 } else
2227 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2228
2229 if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2230 tx_flags |= TX_CMD_FLG_RTS_MSK;
2231 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2232 } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2233 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2234 tx_flags |= TX_CMD_FLG_CTS_MSK;
2235 }
2236
2237 if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2238 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2239
2240 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2241 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2242 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2243 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2244 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2245 else
2246 cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2247 } else {
2248 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2249 }
2250
2251 cmd->cmd.tx.driver_txop = 0;
2252 cmd->cmd.tx.tx_flags = tx_flags;
2253 cmd->cmd.tx.next_frame_len = 0;
2254 }
2255 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2256 {
2257 /* 0 - mgmt, 1 - cnt, 2 - data */
2258 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2259 priv->tx_stats[idx].cnt++;
2260 priv->tx_stats[idx].bytes += len;
2261 }
2262 /**
2263 * iwl4965_get_sta_id - Find station's index within station table
2264 *
2265 * If new IBSS station, create new entry in station table
2266 */
2267 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2268 struct ieee80211_hdr *hdr)
2269 {
2270 int sta_id;
2271 u16 fc = le16_to_cpu(hdr->frame_control);
2272 DECLARE_MAC_BUF(mac);
2273
2274 /* If this frame is broadcast or management, use broadcast station id */
2275 if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2276 is_multicast_ether_addr(hdr->addr1))
2277 return priv->hw_setting.bcast_sta_id;
2278
2279 switch (priv->iw_mode) {
2280
2281 /* If we are a client station in a BSS network, use the special
2282 * AP station entry (that's the only station we communicate with) */
2283 case IEEE80211_IF_TYPE_STA:
2284 return IWL_AP_ID;
2285
2286 /* If we are an AP, then find the station, or use BCAST */
2287 case IEEE80211_IF_TYPE_AP:
2288 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2289 if (sta_id != IWL_INVALID_STATION)
2290 return sta_id;
2291 return priv->hw_setting.bcast_sta_id;
2292
2293 /* If this frame is going out to an IBSS network, find the station,
2294 * or create a new station table entry */
2295 case IEEE80211_IF_TYPE_IBSS:
2296 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2297 if (sta_id != IWL_INVALID_STATION)
2298 return sta_id;
2299
2300 /* Create new station table entry */
2301 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2302 0, CMD_ASYNC, NULL);
2303
2304 if (sta_id != IWL_INVALID_STATION)
2305 return sta_id;
2306
2307 IWL_DEBUG_DROP("Station %s not in station map. "
2308 "Defaulting to broadcast...\n",
2309 print_mac(mac, hdr->addr1));
2310 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2311 return priv->hw_setting.bcast_sta_id;
2312
2313 default:
2314 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2315 return priv->hw_setting.bcast_sta_id;
2316 }
2317 }
2318
2319 /*
2320 * start REPLY_TX command process
2321 */
2322 static int iwl4965_tx_skb(struct iwl_priv *priv,
2323 struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2324 {
2325 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2326 struct iwl4965_tfd_frame *tfd;
2327 u32 *control_flags;
2328 int txq_id = ctl->queue;
2329 struct iwl4965_tx_queue *txq = NULL;
2330 struct iwl4965_queue *q = NULL;
2331 dma_addr_t phys_addr;
2332 dma_addr_t txcmd_phys;
2333 dma_addr_t scratch_phys;
2334 struct iwl_cmd *out_cmd = NULL;
2335 u16 len, idx, len_org;
2336 u8 id, hdr_len, unicast;
2337 u8 sta_id;
2338 u16 seq_number = 0;
2339 u16 fc;
2340 __le16 *qc;
2341 u8 wait_write_ptr = 0;
2342 unsigned long flags;
2343 int rc;
2344
2345 spin_lock_irqsave(&priv->lock, flags);
2346 if (iwl4965_is_rfkill(priv)) {
2347 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2348 goto drop_unlock;
2349 }
2350
2351 if (!priv->vif) {
2352 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2353 goto drop_unlock;
2354 }
2355
2356 if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2357 IWL_ERROR("ERROR: No TX rate available.\n");
2358 goto drop_unlock;
2359 }
2360
2361 unicast = !is_multicast_ether_addr(hdr->addr1);
2362 id = 0;
2363
2364 fc = le16_to_cpu(hdr->frame_control);
2365
2366 #ifdef CONFIG_IWLWIFI_DEBUG
2367 if (ieee80211_is_auth(fc))
2368 IWL_DEBUG_TX("Sending AUTH frame\n");
2369 else if (ieee80211_is_assoc_request(fc))
2370 IWL_DEBUG_TX("Sending ASSOC frame\n");
2371 else if (ieee80211_is_reassoc_request(fc))
2372 IWL_DEBUG_TX("Sending REASSOC frame\n");
2373 #endif
2374
2375 /* drop all data frame if we are not associated */
2376 if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2377 (!iwl4965_is_associated(priv) ||
2378 ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2379 !priv->assoc_station_added)) {
2380 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2381 goto drop_unlock;
2382 }
2383
2384 spin_unlock_irqrestore(&priv->lock, flags);
2385
2386 hdr_len = ieee80211_get_hdrlen(fc);
2387
2388 /* Find (or create) index into station table for destination station */
2389 sta_id = iwl4965_get_sta_id(priv, hdr);
2390 if (sta_id == IWL_INVALID_STATION) {
2391 DECLARE_MAC_BUF(mac);
2392
2393 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2394 print_mac(mac, hdr->addr1));
2395 goto drop;
2396 }
2397
2398 IWL_DEBUG_RATE("station Id %d\n", sta_id);
2399
2400 qc = ieee80211_get_qos_ctrl(hdr);
2401 if (qc) {
2402 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2403 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2404 IEEE80211_SCTL_SEQ;
2405 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2406 (hdr->seq_ctrl &
2407 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2408 seq_number += 0x10;
2409 #ifdef CONFIG_IWL4965_HT
2410 /* aggregation is on for this <sta,tid> */
2411 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2412 txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2413 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2414 #endif /* CONFIG_IWL4965_HT */
2415 }
2416
2417 /* Descriptor for chosen Tx queue */
2418 txq = &priv->txq[txq_id];
2419 q = &txq->q;
2420
2421 spin_lock_irqsave(&priv->lock, flags);
2422
2423 /* Set up first empty TFD within this queue's circular TFD buffer */
2424 tfd = &txq->bd[q->write_ptr];
2425 memset(tfd, 0, sizeof(*tfd));
2426 control_flags = (u32 *) tfd;
2427 idx = get_cmd_index(q, q->write_ptr, 0);
2428
2429 /* Set up driver data for this TFD */
2430 memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2431 txq->txb[q->write_ptr].skb[0] = skb;
2432 memcpy(&(txq->txb[q->write_ptr].status.control),
2433 ctl, sizeof(struct ieee80211_tx_control));
2434
2435 /* Set up first empty entry in queue's array of Tx/cmd buffers */
2436 out_cmd = &txq->cmd[idx];
2437 memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2438 memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2439
2440 /*
2441 * Set up the Tx-command (not MAC!) header.
2442 * Store the chosen Tx queue and TFD index within the sequence field;
2443 * after Tx, uCode's Tx response will return this value so driver can
2444 * locate the frame within the tx queue and do post-tx processing.
2445 */
2446 out_cmd->hdr.cmd = REPLY_TX;
2447 out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2448 INDEX_TO_SEQ(q->write_ptr)));
2449
2450 /* Copy MAC header from skb into command buffer */
2451 memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2452
2453 /*
2454 * Use the first empty entry in this queue's command buffer array
2455 * to contain the Tx command and MAC header concatenated together
2456 * (payload data will be in another buffer).
2457 * Size of this varies, due to varying MAC header length.
2458 * If end is not dword aligned, we'll have 2 extra bytes at the end
2459 * of the MAC header (device reads on dword boundaries).
2460 * We'll tell device about this padding later.
2461 */
2462 len = priv->hw_setting.tx_cmd_len +
2463 sizeof(struct iwl_cmd_header) + hdr_len;
2464
2465 len_org = len;
2466 len = (len + 3) & ~3;
2467
2468 if (len_org != len)
2469 len_org = 1;
2470 else
2471 len_org = 0;
2472
2473 /* Physical address of this Tx command's header (not MAC header!),
2474 * within command buffer array. */
2475 txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2476 offsetof(struct iwl_cmd, hdr);
2477
2478 /* Add buffer containing Tx command and MAC(!) header to TFD's
2479 * first entry */
2480 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2481
2482 if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2483 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2484
2485 /* Set up TFD's 2nd entry to point directly to remainder of skb,
2486 * if any (802.11 null frames have no payload). */
2487 len = skb->len - hdr_len;
2488 if (len) {
2489 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2490 len, PCI_DMA_TODEVICE);
2491 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2492 }
2493
2494 /* Tell 4965 about any 2-byte padding after MAC header */
2495 if (len_org)
2496 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2497
2498 /* Total # bytes to be transmitted */
2499 len = (u16)skb->len;
2500 out_cmd->cmd.tx.len = cpu_to_le16(len);
2501
2502 /* TODO need this for burst mode later on */
2503 iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2504
2505 /* set is_hcca to 0; it probably will never be implemented */
2506 iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2507
2508 iwl_update_tx_stats(priv, fc, len);
2509
2510 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2511 offsetof(struct iwl4965_tx_cmd, scratch);
2512 out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2513 out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2514
2515 if (!ieee80211_get_morefrag(hdr)) {
2516 txq->need_update = 1;
2517 if (qc) {
2518 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2519 priv->stations[sta_id].tid[tid].seq_number = seq_number;
2520 }
2521 } else {
2522 wait_write_ptr = 1;
2523 txq->need_update = 0;
2524 }
2525
2526 iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2527 sizeof(out_cmd->cmd.tx));
2528
2529 iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2530 ieee80211_get_hdrlen(fc));
2531
2532 /* Set up entry for this TFD in Tx byte-count array */
2533 iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2534
2535 /* Tell device the write index *just past* this latest filled TFD */
2536 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2537 rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2538 spin_unlock_irqrestore(&priv->lock, flags);
2539
2540 if (rc)
2541 return rc;
2542
2543 if ((iwl4965_queue_space(q) < q->high_mark)
2544 && priv->mac80211_registered) {
2545 if (wait_write_ptr) {
2546 spin_lock_irqsave(&priv->lock, flags);
2547 txq->need_update = 1;
2548 iwl4965_tx_queue_update_write_ptr(priv, txq);
2549 spin_unlock_irqrestore(&priv->lock, flags);
2550 }
2551
2552 ieee80211_stop_queue(priv->hw, ctl->queue);
2553 }
2554
2555 return 0;
2556
2557 drop_unlock:
2558 spin_unlock_irqrestore(&priv->lock, flags);
2559 drop:
2560 return -1;
2561 }
2562
2563 static void iwl4965_set_rate(struct iwl_priv *priv)
2564 {
2565 const struct ieee80211_supported_band *hw = NULL;
2566 struct ieee80211_rate *rate;
2567 int i;
2568
2569 hw = iwl4965_get_hw_mode(priv, priv->band);
2570 if (!hw) {
2571 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2572 return;
2573 }
2574
2575 priv->active_rate = 0;
2576 priv->active_rate_basic = 0;
2577
2578 for (i = 0; i < hw->n_bitrates; i++) {
2579 rate = &(hw->bitrates[i]);
2580 if (rate->hw_value < IWL_RATE_COUNT)
2581 priv->active_rate |= (1 << rate->hw_value);
2582 }
2583
2584 IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2585 priv->active_rate, priv->active_rate_basic);
2586
2587 /*
2588 * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2589 * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2590 * OFDM
2591 */
2592 if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2593 priv->staging_rxon.cck_basic_rates =
2594 ((priv->active_rate_basic &
2595 IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2596 else
2597 priv->staging_rxon.cck_basic_rates =
2598 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2599
2600 if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2601 priv->staging_rxon.ofdm_basic_rates =
2602 ((priv->active_rate_basic &
2603 (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2604 IWL_FIRST_OFDM_RATE) & 0xFF;
2605 else
2606 priv->staging_rxon.ofdm_basic_rates =
2607 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2608 }
2609
2610 static void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2611 {
2612 unsigned long flags;
2613
2614 if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2615 return;
2616
2617 IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2618 disable_radio ? "OFF" : "ON");
2619
2620 if (disable_radio) {
2621 iwl4965_scan_cancel(priv);
2622 /* FIXME: This is a workaround for AP */
2623 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2624 spin_lock_irqsave(&priv->lock, flags);
2625 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2626 CSR_UCODE_SW_BIT_RFKILL);
2627 spin_unlock_irqrestore(&priv->lock, flags);
2628 iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2629 set_bit(STATUS_RF_KILL_SW, &priv->status);
2630 }
2631 return;
2632 }
2633
2634 spin_lock_irqsave(&priv->lock, flags);
2635 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2636
2637 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2638 spin_unlock_irqrestore(&priv->lock, flags);
2639
2640 /* wake up ucode */
2641 msleep(10);
2642
2643 spin_lock_irqsave(&priv->lock, flags);
2644 iwl_read32(priv, CSR_UCODE_DRV_GP1);
2645 if (!iwl_grab_nic_access(priv))
2646 iwl_release_nic_access(priv);
2647 spin_unlock_irqrestore(&priv->lock, flags);
2648
2649 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2650 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2651 "disabled by HW switch\n");
2652 return;
2653 }
2654
2655 queue_work(priv->workqueue, &priv->restart);
2656 return;
2657 }
2658
2659 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2660 u32 decrypt_res, struct ieee80211_rx_status *stats)
2661 {
2662 u16 fc =
2663 le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2664
2665 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2666 return;
2667
2668 if (!(fc & IEEE80211_FCTL_PROTECTED))
2669 return;
2670
2671 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2672 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2673 case RX_RES_STATUS_SEC_TYPE_TKIP:
2674 /* The uCode has got a bad phase 1 Key, pushes the packet.
2675 * Decryption will be done in SW. */
2676 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2677 RX_RES_STATUS_BAD_KEY_TTAK)
2678 break;
2679
2680 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2681 RX_RES_STATUS_BAD_ICV_MIC)
2682 stats->flag |= RX_FLAG_MMIC_ERROR;
2683 case RX_RES_STATUS_SEC_TYPE_WEP:
2684 case RX_RES_STATUS_SEC_TYPE_CCMP:
2685 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2686 RX_RES_STATUS_DECRYPT_OK) {
2687 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2688 stats->flag |= RX_FLAG_DECRYPTED;
2689 }
2690 break;
2691
2692 default:
2693 break;
2694 }
2695 }
2696
2697
2698 #define IWL_PACKET_RETRY_TIME HZ
2699
2700 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2701 {
2702 u16 sc = le16_to_cpu(header->seq_ctrl);
2703 u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2704 u16 frag = sc & IEEE80211_SCTL_FRAG;
2705 u16 *last_seq, *last_frag;
2706 unsigned long *last_time;
2707
2708 switch (priv->iw_mode) {
2709 case IEEE80211_IF_TYPE_IBSS:{
2710 struct list_head *p;
2711 struct iwl4965_ibss_seq *entry = NULL;
2712 u8 *mac = header->addr2;
2713 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2714
2715 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2716 entry = list_entry(p, struct iwl4965_ibss_seq, list);
2717 if (!compare_ether_addr(entry->mac, mac))
2718 break;
2719 }
2720 if (p == &priv->ibss_mac_hash[index]) {
2721 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2722 if (!entry) {
2723 IWL_ERROR("Cannot malloc new mac entry\n");
2724 return 0;
2725 }
2726 memcpy(entry->mac, mac, ETH_ALEN);
2727 entry->seq_num = seq;
2728 entry->frag_num = frag;
2729 entry->packet_time = jiffies;
2730 list_add(&entry->list, &priv->ibss_mac_hash[index]);
2731 return 0;
2732 }
2733 last_seq = &entry->seq_num;
2734 last_frag = &entry->frag_num;
2735 last_time = &entry->packet_time;
2736 break;
2737 }
2738 case IEEE80211_IF_TYPE_STA:
2739 last_seq = &priv->last_seq_num;
2740 last_frag = &priv->last_frag_num;
2741 last_time = &priv->last_packet_time;
2742 break;
2743 default:
2744 return 0;
2745 }
2746 if ((*last_seq == seq) &&
2747 time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2748 if (*last_frag == frag)
2749 goto drop;
2750 if (*last_frag + 1 != frag)
2751 /* out-of-order fragment */
2752 goto drop;
2753 } else
2754 *last_seq = seq;
2755
2756 *last_frag = frag;
2757 *last_time = jiffies;
2758 return 0;
2759
2760 drop:
2761 return 1;
2762 }
2763
2764 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2765
2766 #include "iwl-spectrum.h"
2767
2768 #define BEACON_TIME_MASK_LOW 0x00FFFFFF
2769 #define BEACON_TIME_MASK_HIGH 0xFF000000
2770 #define TIME_UNIT 1024
2771
2772 /*
2773 * extended beacon time format
2774 * time in usec will be changed into a 32-bit value in 8:24 format
2775 * the high 1 byte is the beacon counts
2776 * the lower 3 bytes is the time in usec within one beacon interval
2777 */
2778
2779 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2780 {
2781 u32 quot;
2782 u32 rem;
2783 u32 interval = beacon_interval * 1024;
2784
2785 if (!interval || !usec)
2786 return 0;
2787
2788 quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2789 rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2790
2791 return (quot << 24) + rem;
2792 }
2793
2794 /* base is usually what we get from ucode with each received frame,
2795 * the same as HW timer counter counting down
2796 */
2797
2798 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2799 {
2800 u32 base_low = base & BEACON_TIME_MASK_LOW;
2801 u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2802 u32 interval = beacon_interval * TIME_UNIT;
2803 u32 res = (base & BEACON_TIME_MASK_HIGH) +
2804 (addon & BEACON_TIME_MASK_HIGH);
2805
2806 if (base_low > addon_low)
2807 res += base_low - addon_low;
2808 else if (base_low < addon_low) {
2809 res += interval + base_low - addon_low;
2810 res += (1 << 24);
2811 } else
2812 res += (1 << 24);
2813
2814 return cpu_to_le32(res);
2815 }
2816
2817 static int iwl4965_get_measurement(struct iwl_priv *priv,
2818 struct ieee80211_measurement_params *params,
2819 u8 type)
2820 {
2821 struct iwl4965_spectrum_cmd spectrum;
2822 struct iwl4965_rx_packet *res;
2823 struct iwl_host_cmd cmd = {
2824 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2825 .data = (void *)&spectrum,
2826 .meta.flags = CMD_WANT_SKB,
2827 };
2828 u32 add_time = le64_to_cpu(params->start_time);
2829 int rc;
2830 int spectrum_resp_status;
2831 int duration = le16_to_cpu(params->duration);
2832
2833 if (iwl4965_is_associated(priv))
2834 add_time =
2835 iwl4965_usecs_to_beacons(
2836 le64_to_cpu(params->start_time) - priv->last_tsf,
2837 le16_to_cpu(priv->rxon_timing.beacon_interval));
2838
2839 memset(&spectrum, 0, sizeof(spectrum));
2840
2841 spectrum.channel_count = cpu_to_le16(1);
2842 spectrum.flags =
2843 RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2844 spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2845 cmd.len = sizeof(spectrum);
2846 spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2847
2848 if (iwl4965_is_associated(priv))
2849 spectrum.start_time =
2850 iwl4965_add_beacon_time(priv->last_beacon_time,
2851 add_time,
2852 le16_to_cpu(priv->rxon_timing.beacon_interval));
2853 else
2854 spectrum.start_time = 0;
2855
2856 spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2857 spectrum.channels[0].channel = params->channel;
2858 spectrum.channels[0].type = type;
2859 if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2860 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2861 RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2862
2863 rc = iwl_send_cmd_sync(priv, &cmd);
2864 if (rc)
2865 return rc;
2866
2867 res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2868 if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2869 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2870 rc = -EIO;
2871 }
2872
2873 spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2874 switch (spectrum_resp_status) {
2875 case 0: /* Command will be handled */
2876 if (res->u.spectrum.id != 0xff) {
2877 IWL_DEBUG_INFO
2878 ("Replaced existing measurement: %d\n",
2879 res->u.spectrum.id);
2880 priv->measurement_status &= ~MEASUREMENT_READY;
2881 }
2882 priv->measurement_status |= MEASUREMENT_ACTIVE;
2883 rc = 0;
2884 break;
2885
2886 case 1: /* Command will not be handled */
2887 rc = -EAGAIN;
2888 break;
2889 }
2890
2891 dev_kfree_skb_any(cmd.meta.u.skb);
2892
2893 return rc;
2894 }
2895 #endif
2896
2897 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2898 struct iwl4965_tx_info *tx_sta)
2899 {
2900
2901 tx_sta->status.ack_signal = 0;
2902 tx_sta->status.excessive_retries = 0;
2903 tx_sta->status.queue_length = 0;
2904 tx_sta->status.queue_number = 0;
2905
2906 if (in_interrupt())
2907 ieee80211_tx_status_irqsafe(priv->hw,
2908 tx_sta->skb[0], &(tx_sta->status));
2909 else
2910 ieee80211_tx_status(priv->hw,
2911 tx_sta->skb[0], &(tx_sta->status));
2912
2913 tx_sta->skb[0] = NULL;
2914 }
2915
2916 /**
2917 * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2918 *
2919 * When FW advances 'R' index, all entries between old and new 'R' index
2920 * need to be reclaimed. As result, some free space forms. If there is
2921 * enough free space (> low mark), wake the stack that feeds us.
2922 */
2923 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2924 {
2925 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2926 struct iwl4965_queue *q = &txq->q;
2927 int nfreed = 0;
2928
2929 if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2930 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2931 "is out of range [0-%d] %d %d.\n", txq_id,
2932 index, q->n_bd, q->write_ptr, q->read_ptr);
2933 return 0;
2934 }
2935
2936 for (index = iwl_queue_inc_wrap(index, q->n_bd);
2937 q->read_ptr != index;
2938 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2939 if (txq_id != IWL_CMD_QUEUE_NUM) {
2940 iwl4965_txstatus_to_ieee(priv,
2941 &(txq->txb[txq->q.read_ptr]));
2942 iwl4965_hw_txq_free_tfd(priv, txq);
2943 } else if (nfreed > 1) {
2944 IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2945 q->write_ptr, q->read_ptr);
2946 queue_work(priv->workqueue, &priv->restart);
2947 }
2948 nfreed++;
2949 }
2950
2951 /* if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2952 (txq_id != IWL_CMD_QUEUE_NUM) &&
2953 priv->mac80211_registered)
2954 ieee80211_wake_queue(priv->hw, txq_id); */
2955
2956
2957 return nfreed;
2958 }
2959
2960 static int iwl4965_is_tx_success(u32 status)
2961 {
2962 status &= TX_STATUS_MSK;
2963 return (status == TX_STATUS_SUCCESS)
2964 || (status == TX_STATUS_DIRECT_DONE);
2965 }
2966
2967 /******************************************************************************
2968 *
2969 * Generic RX handler implementations
2970 *
2971 ******************************************************************************/
2972 #ifdef CONFIG_IWL4965_HT
2973
2974 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2975 struct ieee80211_hdr *hdr)
2976 {
2977 if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2978 return IWL_AP_ID;
2979 else {
2980 u8 *da = ieee80211_get_DA(hdr);
2981 return iwl4965_hw_find_station(priv, da);
2982 }
2983 }
2984
2985 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2986 struct iwl_priv *priv, int txq_id, int idx)
2987 {
2988 if (priv->txq[txq_id].txb[idx].skb[0])
2989 return (struct ieee80211_hdr *)priv->txq[txq_id].
2990 txb[idx].skb[0]->data;
2991 return NULL;
2992 }
2993
2994 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2995 {
2996 __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2997 tx_resp->frame_count);
2998 return le32_to_cpu(*scd_ssn) & MAX_SN;
2999
3000 }
3001
3002 /**
3003 * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3004 */
3005 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3006 struct iwl4965_ht_agg *agg,
3007 struct iwl4965_tx_resp_agg *tx_resp,
3008 u16 start_idx)
3009 {
3010 u16 status;
3011 struct agg_tx_status *frame_status = &tx_resp->status;
3012 struct ieee80211_tx_status *tx_status = NULL;
3013 struct ieee80211_hdr *hdr = NULL;
3014 int i, sh;
3015 int txq_id, idx;
3016 u16 seq;
3017
3018 if (agg->wait_for_ba)
3019 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3020
3021 agg->frame_count = tx_resp->frame_count;
3022 agg->start_idx = start_idx;
3023 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3024 agg->bitmap = 0;
3025
3026 /* # frames attempted by Tx command */
3027 if (agg->frame_count == 1) {
3028 /* Only one frame was attempted; no block-ack will arrive */
3029 status = le16_to_cpu(frame_status[0].status);
3030 seq = le16_to_cpu(frame_status[0].sequence);
3031 idx = SEQ_TO_INDEX(seq);
3032 txq_id = SEQ_TO_QUEUE(seq);
3033
3034 /* FIXME: code repetition */
3035 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3036 agg->frame_count, agg->start_idx, idx);
3037
3038 tx_status = &(priv->txq[txq_id].txb[idx].status);
3039 tx_status->retry_count = tx_resp->failure_frame;
3040 tx_status->queue_number = status & 0xff;
3041 tx_status->queue_length = tx_resp->failure_rts;
3042 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3043 tx_status->flags = iwl4965_is_tx_success(status)?
3044 IEEE80211_TX_STATUS_ACK : 0;
3045 iwl4965_hwrate_to_tx_control(priv,
3046 le32_to_cpu(tx_resp->rate_n_flags),
3047 &tx_status->control);
3048 /* FIXME: code repetition end */
3049
3050 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3051 status & 0xff, tx_resp->failure_frame);
3052 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3053 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3054
3055 agg->wait_for_ba = 0;
3056 } else {
3057 /* Two or more frames were attempted; expect block-ack */
3058 u64 bitmap = 0;
3059 int start = agg->start_idx;
3060
3061 /* Construct bit-map of pending frames within Tx window */
3062 for (i = 0; i < agg->frame_count; i++) {
3063 u16 sc;
3064 status = le16_to_cpu(frame_status[i].status);
3065 seq = le16_to_cpu(frame_status[i].sequence);
3066 idx = SEQ_TO_INDEX(seq);
3067 txq_id = SEQ_TO_QUEUE(seq);
3068
3069 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3070 AGG_TX_STATE_ABORT_MSK))
3071 continue;
3072
3073 IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3074 agg->frame_count, txq_id, idx);
3075
3076 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3077
3078 sc = le16_to_cpu(hdr->seq_ctrl);
3079 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3080 IWL_ERROR("BUG_ON idx doesn't match seq control"
3081 " idx=%d, seq_idx=%d, seq=%d\n",
3082 idx, SEQ_TO_SN(sc),
3083 hdr->seq_ctrl);
3084 return -1;
3085 }
3086
3087 IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3088 i, idx, SEQ_TO_SN(sc));
3089
3090 sh = idx - start;
3091 if (sh > 64) {
3092 sh = (start - idx) + 0xff;
3093 bitmap = bitmap << sh;
3094 sh = 0;
3095 start = idx;
3096 } else if (sh < -64)
3097 sh = 0xff - (start - idx);
3098 else if (sh < 0) {
3099 sh = start - idx;
3100 start = idx;
3101 bitmap = bitmap << sh;
3102 sh = 0;
3103 }
3104 bitmap |= (1 << sh);
3105 IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3106 start, (u32)(bitmap & 0xFFFFFFFF));
3107 }
3108
3109 agg->bitmap = bitmap;
3110 agg->start_idx = start;
3111 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3112 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3113 agg->frame_count, agg->start_idx,
3114 agg->bitmap);
3115
3116 if (bitmap)
3117 agg->wait_for_ba = 1;
3118 }
3119 return 0;
3120 }
3121 #endif
3122
3123 /**
3124 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3125 */
3126 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3127 struct iwl4965_rx_mem_buffer *rxb)
3128 {
3129 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3130 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3131 int txq_id = SEQ_TO_QUEUE(sequence);
3132 int index = SEQ_TO_INDEX(sequence);
3133 struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3134 struct ieee80211_tx_status *tx_status;
3135 struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3136 u32 status = le32_to_cpu(tx_resp->status);
3137 #ifdef CONFIG_IWL4965_HT
3138 int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3139 struct ieee80211_hdr *hdr;
3140 __le16 *qc;
3141 #endif
3142
3143 if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3144 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3145 "is out of range [0-%d] %d %d\n", txq_id,
3146 index, txq->q.n_bd, txq->q.write_ptr,
3147 txq->q.read_ptr);
3148 return;
3149 }
3150
3151 #ifdef CONFIG_IWL4965_HT
3152 hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3153 qc = ieee80211_get_qos_ctrl(hdr);
3154
3155 if (qc)
3156 tid = le16_to_cpu(*qc) & 0xf;
3157
3158 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3159 if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3160 IWL_ERROR("Station not known\n");
3161 return;
3162 }
3163
3164 if (txq->sched_retry) {
3165 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3166 struct iwl4965_ht_agg *agg = NULL;
3167
3168 if (!qc)
3169 return;
3170
3171 agg = &priv->stations[sta_id].tid[tid].agg;
3172
3173 iwl4965_tx_status_reply_tx(priv, agg,
3174 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3175
3176 if ((tx_resp->frame_count == 1) &&
3177 !iwl4965_is_tx_success(status)) {
3178 /* TODO: send BAR */
3179 }
3180
3181 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3182 int freed;
3183 index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3184 IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3185 "%d index %d\n", scd_ssn , index);
3186 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3187 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3188
3189 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3190 txq_id >= 0 && priv->mac80211_registered &&
3191 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3192 ieee80211_wake_queue(priv->hw, txq_id);
3193
3194 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3195 }
3196 } else {
3197 #endif /* CONFIG_IWL4965_HT */
3198 tx_status = &(txq->txb[txq->q.read_ptr].status);
3199
3200 tx_status->retry_count = tx_resp->failure_frame;
3201 tx_status->queue_number = status;
3202 tx_status->queue_length = tx_resp->bt_kill_count;
3203 tx_status->queue_length |= tx_resp->failure_rts;
3204 tx_status->flags =
3205 iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3206 iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3207 &tx_status->control);
3208
3209 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3210 "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3211 status, le32_to_cpu(tx_resp->rate_n_flags),
3212 tx_resp->failure_frame);
3213
3214 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3215 if (index != -1) {
3216 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3217 #ifdef CONFIG_IWL4965_HT
3218 if (tid != MAX_TID_COUNT)
3219 priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3220 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3221 (txq_id >= 0) &&
3222 priv->mac80211_registered)
3223 ieee80211_wake_queue(priv->hw, txq_id);
3224 if (tid != MAX_TID_COUNT)
3225 iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3226 #endif
3227 }
3228 #ifdef CONFIG_IWL4965_HT
3229 }
3230 #endif /* CONFIG_IWL4965_HT */
3231
3232 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3233 IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
3234 }
3235
3236
3237 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3238 struct iwl4965_rx_mem_buffer *rxb)
3239 {
3240 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3241 struct iwl4965_alive_resp *palive;
3242 struct delayed_work *pwork;
3243
3244 palive = &pkt->u.alive_frame;
3245
3246 IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3247 "0x%01X 0x%01X\n",
3248 palive->is_valid, palive->ver_type,
3249 palive->ver_subtype);
3250
3251 if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3252 IWL_DEBUG_INFO("Initialization Alive received.\n");
3253 memcpy(&priv->card_alive_init,
3254 &pkt->u.alive_frame,
3255 sizeof(struct iwl4965_init_alive_resp));
3256 pwork = &priv->init_alive_start;
3257 } else {
3258 IWL_DEBUG_INFO("Runtime Alive received.\n");
3259 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3260 sizeof(struct iwl4965_alive_resp));
3261 pwork = &priv->alive_start;
3262 }
3263
3264 /* We delay the ALIVE response by 5ms to
3265 * give the HW RF Kill time to activate... */
3266 if (palive->is_valid == UCODE_VALID_OK)
3267 queue_delayed_work(priv->workqueue, pwork,
3268 msecs_to_jiffies(5));
3269 else
3270 IWL_WARNING("uCode did not respond OK.\n");
3271 }
3272
3273 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3274 struct iwl4965_rx_mem_buffer *rxb)
3275 {
3276 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3277
3278 IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3279 return;
3280 }
3281
3282 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3283 struct iwl4965_rx_mem_buffer *rxb)
3284 {
3285 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3286
3287 IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3288 "seq 0x%04X ser 0x%08X\n",
3289 le32_to_cpu(pkt->u.err_resp.error_type),
3290 get_cmd_string(pkt->u.err_resp.cmd_id),
3291 pkt->u.err_resp.cmd_id,
3292 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3293 le32_to_cpu(pkt->u.err_resp.error_info));
3294 }
3295
3296 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3297
3298 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3299 {
3300 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3301 struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3302 struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3303 IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3304 le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3305 rxon->channel = csa->channel;
3306 priv->staging_rxon.channel = csa->channel;
3307 }
3308
3309 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3310 struct iwl4965_rx_mem_buffer *rxb)
3311 {
3312 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3313 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3314 struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3315
3316 if (!report->state) {
3317 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3318 "Spectrum Measure Notification: Start\n");
3319 return;
3320 }
3321
3322 memcpy(&priv->measure_report, report, sizeof(*report));
3323 priv->measurement_status |= MEASUREMENT_READY;
3324 #endif
3325 }
3326
3327 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3328 struct iwl4965_rx_mem_buffer *rxb)
3329 {
3330 #ifdef CONFIG_IWLWIFI_DEBUG
3331 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3332 struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3333 IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3334 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3335 #endif
3336 }
3337
3338 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3339 struct iwl4965_rx_mem_buffer *rxb)
3340 {
3341 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3342 IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3343 "notification for %s:\n",
3344 le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3345 iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3346 }
3347
3348 static void iwl4965_bg_beacon_update(struct work_struct *work)
3349 {
3350 struct iwl_priv *priv =
3351 container_of(work, struct iwl_priv, beacon_update);
3352 struct sk_buff *beacon;
3353
3354 /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3355 beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3356
3357 if (!beacon) {
3358 IWL_ERROR("update beacon failed\n");
3359 return;
3360 }
3361
3362 mutex_lock(&priv->mutex);
3363 /* new beacon skb is allocated every time; dispose previous.*/
3364 if (priv->ibss_beacon)
3365 dev_kfree_skb(priv->ibss_beacon);
3366
3367 priv->ibss_beacon = beacon;
3368 mutex_unlock(&priv->mutex);
3369
3370 iwl4965_send_beacon_cmd(priv);
3371 }
3372
3373 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3374 struct iwl4965_rx_mem_buffer *rxb)
3375 {
3376 #ifdef CONFIG_IWLWIFI_DEBUG
3377 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3378 struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3379 u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3380
3381 IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3382 "tsf %d %d rate %d\n",
3383 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3384 beacon->beacon_notify_hdr.failure_frame,
3385 le32_to_cpu(beacon->ibss_mgr_status),
3386 le32_to_cpu(beacon->high_tsf),
3387 le32_to_cpu(beacon->low_tsf), rate);
3388 #endif
3389
3390 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3391 (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3392 queue_work(priv->workqueue, &priv->beacon_update);
3393 }
3394
3395 /* Service response to REPLY_SCAN_CMD (0x80) */
3396 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3397 struct iwl4965_rx_mem_buffer *rxb)
3398 {
3399 #ifdef CONFIG_IWLWIFI_DEBUG
3400 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3401 struct iwl4965_scanreq_notification *notif =
3402 (struct iwl4965_scanreq_notification *)pkt->u.raw;
3403
3404 IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3405 #endif
3406 }
3407
3408 /* Service SCAN_START_NOTIFICATION (0x82) */
3409 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3410 struct iwl4965_rx_mem_buffer *rxb)
3411 {
3412 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3413 struct iwl4965_scanstart_notification *notif =
3414 (struct iwl4965_scanstart_notification *)pkt->u.raw;
3415 priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3416 IWL_DEBUG_SCAN("Scan start: "
3417 "%d [802.11%s] "
3418 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3419 notif->channel,
3420 notif->band ? "bg" : "a",
3421 notif->tsf_high,
3422 notif->tsf_low, notif->status, notif->beacon_timer);
3423 }
3424
3425 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3426 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3427 struct iwl4965_rx_mem_buffer *rxb)
3428 {
3429 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3430 struct iwl4965_scanresults_notification *notif =
3431 (struct iwl4965_scanresults_notification *)pkt->u.raw;
3432
3433 IWL_DEBUG_SCAN("Scan ch.res: "
3434 "%d [802.11%s] "
3435 "(TSF: 0x%08X:%08X) - %d "
3436 "elapsed=%lu usec (%dms since last)\n",
3437 notif->channel,
3438 notif->band ? "bg" : "a",
3439 le32_to_cpu(notif->tsf_high),
3440 le32_to_cpu(notif->tsf_low),
3441 le32_to_cpu(notif->statistics[0]),
3442 le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3443 jiffies_to_msecs(elapsed_jiffies
3444 (priv->last_scan_jiffies, jiffies)));
3445
3446 priv->last_scan_jiffies = jiffies;
3447 priv->next_scan_jiffies = 0;
3448 }
3449
3450 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3451 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3452 struct iwl4965_rx_mem_buffer *rxb)
3453 {
3454 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3455 struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3456
3457 IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3458 scan_notif->scanned_channels,
3459 scan_notif->tsf_low,
3460 scan_notif->tsf_high, scan_notif->status);
3461
3462 /* The HW is no longer scanning */
3463 clear_bit(STATUS_SCAN_HW, &priv->status);
3464
3465 /* The scan completion notification came in, so kill that timer... */
3466 cancel_delayed_work(&priv->scan_check);
3467
3468 IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3469 (priv->scan_bands == 2) ? "2.4" : "5.2",
3470 jiffies_to_msecs(elapsed_jiffies
3471 (priv->scan_pass_start, jiffies)));
3472
3473 /* Remove this scanned band from the list
3474 * of pending bands to scan */
3475 priv->scan_bands--;
3476
3477 /* If a request to abort was given, or the scan did not succeed
3478 * then we reset the scan state machine and terminate,
3479 * re-queuing another scan if one has been requested */
3480 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3481 IWL_DEBUG_INFO("Aborted scan completed.\n");
3482 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3483 } else {
3484 /* If there are more bands on this scan pass reschedule */
3485 if (priv->scan_bands > 0)
3486 goto reschedule;
3487 }
3488
3489 priv->last_scan_jiffies = jiffies;
3490 priv->next_scan_jiffies = 0;
3491 IWL_DEBUG_INFO("Setting scan to off\n");
3492
3493 clear_bit(STATUS_SCANNING, &priv->status);
3494
3495 IWL_DEBUG_INFO("Scan took %dms\n",
3496 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3497
3498 queue_work(priv->workqueue, &priv->scan_completed);
3499
3500 return;
3501
3502 reschedule:
3503 priv->scan_pass_start = jiffies;
3504 queue_work(priv->workqueue, &priv->request_scan);
3505 }
3506
3507 /* Handle notification from uCode that card's power state is changing
3508 * due to software, hardware, or critical temperature RFKILL */
3509 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3510 struct iwl4965_rx_mem_buffer *rxb)
3511 {
3512 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3513 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3514 unsigned long status = priv->status;
3515
3516 IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3517 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3518 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3519
3520 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3521 RF_CARD_DISABLED)) {
3522
3523 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3524 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3525
3526 if (!iwl_grab_nic_access(priv)) {
3527 iwl_write_direct32(
3528 priv, HBUS_TARG_MBX_C,
3529 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3530
3531 iwl_release_nic_access(priv);
3532 }
3533
3534 if (!(flags & RXON_CARD_DISABLED)) {
3535 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3536 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3537 if (!iwl_grab_nic_access(priv)) {
3538 iwl_write_direct32(
3539 priv, HBUS_TARG_MBX_C,
3540 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3541
3542 iwl_release_nic_access(priv);
3543 }
3544 }
3545
3546 if (flags & RF_CARD_DISABLED) {
3547 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3548 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3549 iwl_read32(priv, CSR_UCODE_DRV_GP1);
3550 if (!iwl_grab_nic_access(priv))
3551 iwl_release_nic_access(priv);
3552 }
3553 }
3554
3555 if (flags & HW_CARD_DISABLED)
3556 set_bit(STATUS_RF_KILL_HW, &priv->status);
3557 else
3558 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3559
3560
3561 if (flags & SW_CARD_DISABLED)
3562 set_bit(STATUS_RF_KILL_SW, &priv->status);
3563 else
3564 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3565
3566 if (!(flags & RXON_CARD_DISABLED))
3567 iwl4965_scan_cancel(priv);
3568
3569 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3570 test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3571 (test_bit(STATUS_RF_KILL_SW, &status) !=
3572 test_bit(STATUS_RF_KILL_SW, &priv->status)))
3573 queue_work(priv->workqueue, &priv->rf_kill);
3574 else
3575 wake_up_interruptible(&priv->wait_command_queue);
3576 }
3577
3578 /**
3579 * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3580 *
3581 * Setup the RX handlers for each of the reply types sent from the uCode
3582 * to the host.
3583 *
3584 * This function chains into the hardware specific files for them to setup
3585 * any hardware specific handlers as well.
3586 */
3587 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3588 {
3589 priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3590 priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3591 priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3592 priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3593 priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3594 iwl4965_rx_spectrum_measure_notif;
3595 priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3596 priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3597 iwl4965_rx_pm_debug_statistics_notif;
3598 priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3599
3600 /*
3601 * The same handler is used for both the REPLY to a discrete
3602 * statistics request from the host as well as for the periodic
3603 * statistics notifications (after received beacons) from the uCode.
3604 */
3605 priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3606 priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3607
3608 priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3609 priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3610 priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3611 iwl4965_rx_scan_results_notif;
3612 priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3613 iwl4965_rx_scan_complete_notif;
3614 priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3615 priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3616
3617 /* Set up hardware specific Rx handlers */
3618 iwl4965_hw_rx_handler_setup(priv);
3619 }
3620
3621 /**
3622 * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3623 * @rxb: Rx buffer to reclaim
3624 *
3625 * If an Rx buffer has an async callback associated with it the callback
3626 * will be executed. The attached skb (if present) will only be freed
3627 * if the callback returns 1
3628 */
3629 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3630 struct iwl4965_rx_mem_buffer *rxb)
3631 {
3632 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3633 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3634 int txq_id = SEQ_TO_QUEUE(sequence);
3635 int index = SEQ_TO_INDEX(sequence);
3636 int huge = sequence & SEQ_HUGE_FRAME;
3637 int cmd_index;
3638 struct iwl_cmd *cmd;
3639
3640 /* If a Tx command is being handled and it isn't in the actual
3641 * command queue then there a command routing bug has been introduced
3642 * in the queue management code. */
3643 if (txq_id != IWL_CMD_QUEUE_NUM)
3644 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3645 txq_id, pkt->hdr.cmd);
3646 BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3647
3648 cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3649 cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3650
3651 /* Input error checking is done when commands are added to queue. */
3652 if (cmd->meta.flags & CMD_WANT_SKB) {
3653 cmd->meta.source->u.skb = rxb->skb;
3654 rxb->skb = NULL;
3655 } else if (cmd->meta.u.callback &&
3656 !cmd->meta.u.callback(priv, cmd, rxb->skb))
3657 rxb->skb = NULL;
3658
3659 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3660
3661 if (!(cmd->meta.flags & CMD_ASYNC)) {
3662 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3663 wake_up_interruptible(&priv->wait_command_queue);
3664 }
3665 }
3666
3667 /************************** RX-FUNCTIONS ****************************/
3668 /*
3669 * Rx theory of operation
3670 *
3671 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3672 * each of which point to Receive Buffers to be filled by 4965. These get
3673 * used not only for Rx frames, but for any command response or notification
3674 * from the 4965. The driver and 4965 manage the Rx buffers by means
3675 * of indexes into the circular buffer.
3676 *
3677 * Rx Queue Indexes
3678 * The host/firmware share two index registers for managing the Rx buffers.
3679 *
3680 * The READ index maps to the first position that the firmware may be writing
3681 * to -- the driver can read up to (but not including) this position and get
3682 * good data.
3683 * The READ index is managed by the firmware once the card is enabled.
3684 *
3685 * The WRITE index maps to the last position the driver has read from -- the
3686 * position preceding WRITE is the last slot the firmware can place a packet.
3687 *
3688 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3689 * WRITE = READ.
3690 *
3691 * During initialization, the host sets up the READ queue position to the first
3692 * INDEX position, and WRITE to the last (READ - 1 wrapped)
3693 *
3694 * When the firmware places a packet in a buffer, it will advance the READ index
3695 * and fire the RX interrupt. The driver can then query the READ index and
3696 * process as many packets as possible, moving the WRITE index forward as it
3697 * resets the Rx queue buffers with new memory.
3698 *
3699 * The management in the driver is as follows:
3700 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
3701 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3702 * to replenish the iwl->rxq->rx_free.
3703 * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3704 * iwl->rxq is replenished and the READ INDEX is updated (updating the
3705 * 'processed' and 'read' driver indexes as well)
3706 * + A received packet is processed and handed to the kernel network stack,
3707 * detached from the iwl->rxq. The driver 'processed' index is updated.
3708 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3709 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3710 * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there
3711 * were enough free buffers and RX_STALLED is set it is cleared.
3712 *
3713 *
3714 * Driver sequence:
3715 *
3716 * iwl4965_rx_queue_alloc() Allocates rx_free
3717 * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
3718 * iwl4965_rx_queue_restock
3719 * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3720 * queue, updates firmware pointers, and updates
3721 * the WRITE index. If insufficient rx_free buffers
3722 * are available, schedules iwl4965_rx_replenish
3723 *
3724 * -- enable interrupts --
3725 * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
3726 * READ INDEX, detaching the SKB from the pool.
3727 * Moves the packet buffer from queue to rx_used.
3728 * Calls iwl4965_rx_queue_restock to refill any empty
3729 * slots.
3730 * ...
3731 *
3732 */
3733
3734 /**
3735 * iwl4965_rx_queue_space - Return number of free slots available in queue.
3736 */
3737 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3738 {
3739 int s = q->read - q->write;
3740 if (s <= 0)
3741 s += RX_QUEUE_SIZE;
3742 /* keep some buffer to not confuse full and empty queue */
3743 s -= 2;
3744 if (s < 0)
3745 s = 0;
3746 return s;
3747 }
3748
3749 /**
3750 * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3751 */
3752 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3753 {
3754 u32 reg = 0;
3755 int rc = 0;
3756 unsigned long flags;
3757
3758 spin_lock_irqsave(&q->lock, flags);
3759
3760 if (q->need_update == 0)
3761 goto exit_unlock;
3762
3763 /* If power-saving is in use, make sure device is awake */
3764 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3765 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3766
3767 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3768 iwl_set_bit(priv, CSR_GP_CNTRL,
3769 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3770 goto exit_unlock;
3771 }
3772
3773 rc = iwl_grab_nic_access(priv);
3774 if (rc)
3775 goto exit_unlock;
3776
3777 /* Device expects a multiple of 8 */
3778 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3779 q->write & ~0x7);
3780 iwl_release_nic_access(priv);
3781
3782 /* Else device is assumed to be awake */
3783 } else
3784 /* Device expects a multiple of 8 */
3785 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3786
3787
3788 q->need_update = 0;
3789
3790 exit_unlock:
3791 spin_unlock_irqrestore(&q->lock, flags);
3792 return rc;
3793 }
3794
3795 /**
3796 * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3797 */
3798 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3799 dma_addr_t dma_addr)
3800 {
3801 return cpu_to_le32((u32)(dma_addr >> 8));
3802 }
3803
3804
3805 /**
3806 * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3807 *
3808 * If there are slots in the RX queue that need to be restocked,
3809 * and we have free pre-allocated buffers, fill the ranks as much
3810 * as we can, pulling from rx_free.
3811 *
3812 * This moves the 'write' index forward to catch up with 'processed', and
3813 * also updates the memory address in the firmware to reference the new
3814 * target buffer.
3815 */
3816 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3817 {
3818 struct iwl4965_rx_queue *rxq = &priv->rxq;
3819 struct list_head *element;
3820 struct iwl4965_rx_mem_buffer *rxb;
3821 unsigned long flags;
3822 int write, rc;
3823
3824 spin_lock_irqsave(&rxq->lock, flags);
3825 write = rxq->write & ~0x7;
3826 while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3827 /* Get next free Rx buffer, remove from free list */
3828 element = rxq->rx_free.next;
3829 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3830 list_del(element);
3831
3832 /* Point to Rx buffer via next RBD in circular buffer */
3833 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3834 rxq->queue[rxq->write] = rxb;
3835 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3836 rxq->free_count--;
3837 }
3838 spin_unlock_irqrestore(&rxq->lock, flags);
3839 /* If the pre-allocated buffer pool is dropping low, schedule to
3840 * refill it */
3841 if (rxq->free_count <= RX_LOW_WATERMARK)
3842 queue_work(priv->workqueue, &priv->rx_replenish);
3843
3844
3845 /* If we've added more space for the firmware to place data, tell it.
3846 * Increment device's write pointer in multiples of 8. */
3847 if ((write != (rxq->write & ~0x7))
3848 || (abs(rxq->write - rxq->read) > 7)) {
3849 spin_lock_irqsave(&rxq->lock, flags);
3850 rxq->need_update = 1;
3851 spin_unlock_irqrestore(&rxq->lock, flags);
3852 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3853 if (rc)
3854 return rc;
3855 }
3856
3857 return 0;
3858 }
3859
3860 /**
3861 * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3862 *
3863 * When moving to rx_free an SKB is allocated for the slot.
3864 *
3865 * Also restock the Rx queue via iwl4965_rx_queue_restock.
3866 * This is called as a scheduled work item (except for during initialization)
3867 */
3868 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3869 {
3870 struct iwl4965_rx_queue *rxq = &priv->rxq;
3871 struct list_head *element;
3872 struct iwl4965_rx_mem_buffer *rxb;
3873 unsigned long flags;
3874 spin_lock_irqsave(&rxq->lock, flags);
3875 while (!list_empty(&rxq->rx_used)) {
3876 element = rxq->rx_used.next;
3877 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3878
3879 /* Alloc a new receive buffer */
3880 rxb->skb =
3881 alloc_skb(priv->hw_setting.rx_buf_size,
3882 __GFP_NOWARN | GFP_ATOMIC);
3883 if (!rxb->skb) {
3884 if (net_ratelimit())
3885 printk(KERN_CRIT DRV_NAME
3886 ": Can not allocate SKB buffers\n");
3887 /* We don't reschedule replenish work here -- we will
3888 * call the restock method and if it still needs
3889 * more buffers it will schedule replenish */
3890 break;
3891 }
3892 priv->alloc_rxb_skb++;
3893 list_del(element);
3894
3895 /* Get physical address of RB/SKB */
3896 rxb->dma_addr =
3897 pci_map_single(priv->pci_dev, rxb->skb->data,
3898 priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
3899 list_add_tail(&rxb->list, &rxq->rx_free);
3900 rxq->free_count++;
3901 }
3902 spin_unlock_irqrestore(&rxq->lock, flags);
3903 }
3904
3905 /*
3906 * this should be called while priv->lock is locked
3907 */
3908 static void __iwl4965_rx_replenish(void *data)
3909 {
3910 struct iwl_priv *priv = data;
3911
3912 iwl4965_rx_allocate(priv);
3913 iwl4965_rx_queue_restock(priv);
3914 }
3915
3916
3917 void iwl4965_rx_replenish(void *data)
3918 {
3919 struct iwl_priv *priv = data;
3920 unsigned long flags;
3921
3922 iwl4965_rx_allocate(priv);
3923
3924 spin_lock_irqsave(&priv->lock, flags);
3925 iwl4965_rx_queue_restock(priv);
3926 spin_unlock_irqrestore(&priv->lock, flags);
3927 }
3928
3929 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3930 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3931 * This free routine walks the list of POOL entries and if SKB is set to
3932 * non NULL it is unmapped and freed
3933 */
3934 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3935 {
3936 int i;
3937 for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3938 if (rxq->pool[i].skb != NULL) {
3939 pci_unmap_single(priv->pci_dev,
3940 rxq->pool[i].dma_addr,
3941 priv->hw_setting.rx_buf_size,
3942 PCI_DMA_FROMDEVICE);
3943 dev_kfree_skb(rxq->pool[i].skb);
3944 }
3945 }
3946
3947 pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3948 rxq->dma_addr);
3949 rxq->bd = NULL;
3950 }
3951
3952 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3953 {
3954 struct iwl4965_rx_queue *rxq = &priv->rxq;
3955 struct pci_dev *dev = priv->pci_dev;
3956 int i;
3957
3958 spin_lock_init(&rxq->lock);
3959 INIT_LIST_HEAD(&rxq->rx_free);
3960 INIT_LIST_HEAD(&rxq->rx_used);
3961
3962 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3963 rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3964 if (!rxq->bd)
3965 return -ENOMEM;
3966
3967 /* Fill the rx_used queue with _all_ of the Rx buffers */
3968 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3969 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3970
3971 /* Set us so that we have processed and used all buffers, but have
3972 * not restocked the Rx queue with fresh buffers */
3973 rxq->read = rxq->write = 0;
3974 rxq->free_count = 0;
3975 rxq->need_update = 0;
3976 return 0;
3977 }
3978
3979 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3980 {
3981 unsigned long flags;
3982 int i;
3983 spin_lock_irqsave(&rxq->lock, flags);
3984 INIT_LIST_HEAD(&rxq->rx_free);
3985 INIT_LIST_HEAD(&rxq->rx_used);
3986 /* Fill the rx_used queue with _all_ of the Rx buffers */
3987 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3988 /* In the reset function, these buffers may have been allocated
3989 * to an SKB, so we need to unmap and free potential storage */
3990 if (rxq->pool[i].skb != NULL) {
3991 pci_unmap_single(priv->pci_dev,
3992 rxq->pool[i].dma_addr,
3993 priv->hw_setting.rx_buf_size,
3994 PCI_DMA_FROMDEVICE);
3995 priv->alloc_rxb_skb--;
3996 dev_kfree_skb(rxq->pool[i].skb);
3997 rxq->pool[i].skb = NULL;
3998 }
3999 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4000 }
4001
4002 /* Set us so that we have processed and used all buffers, but have
4003 * not restocked the Rx queue with fresh buffers */
4004 rxq->read = rxq->write = 0;
4005 rxq->free_count = 0;
4006 spin_unlock_irqrestore(&rxq->lock, flags);
4007 }
4008
4009 /* Convert linear signal-to-noise ratio into dB */
4010 static u8 ratio2dB[100] = {
4011 /* 0 1 2 3 4 5 6 7 8 9 */
4012 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4013 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4014 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4015 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4016 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4017 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4018 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4019 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4020 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4021 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */
4022 };
4023
4024 /* Calculates a relative dB value from a ratio of linear
4025 * (i.e. not dB) signal levels.
4026 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4027 int iwl4965_calc_db_from_ratio(int sig_ratio)
4028 {
4029 /* 1000:1 or higher just report as 60 dB */
4030 if (sig_ratio >= 1000)
4031 return 60;
4032
4033 /* 100:1 or higher, divide by 10 and use table,
4034 * add 20 dB to make up for divide by 10 */
4035 if (sig_ratio >= 100)
4036 return (20 + (int)ratio2dB[sig_ratio/10]);
4037
4038 /* We shouldn't see this */
4039 if (sig_ratio < 1)
4040 return 0;
4041
4042 /* Use table for ratios 1:1 - 99:1 */
4043 return (int)ratio2dB[sig_ratio];
4044 }
4045
4046 #define PERFECT_RSSI (-20) /* dBm */
4047 #define WORST_RSSI (-95) /* dBm */
4048 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4049
4050 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4051 * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4052 * about formulas used below. */
4053 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4054 {
4055 int sig_qual;
4056 int degradation = PERFECT_RSSI - rssi_dbm;
4057
4058 /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4059 * as indicator; formula is (signal dbm - noise dbm).
4060 * SNR at or above 40 is a great signal (100%).
4061 * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4062 * Weakest usable signal is usually 10 - 15 dB SNR. */
4063 if (noise_dbm) {
4064 if (rssi_dbm - noise_dbm >= 40)
4065 return 100;
4066 else if (rssi_dbm < noise_dbm)
4067 return 0;
4068 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4069
4070 /* Else use just the signal level.
4071 * This formula is a least squares fit of data points collected and
4072 * compared with a reference system that had a percentage (%) display
4073 * for signal quality. */
4074 } else
4075 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4076 (15 * RSSI_RANGE + 62 * degradation)) /
4077 (RSSI_RANGE * RSSI_RANGE);
4078
4079 if (sig_qual > 100)
4080 sig_qual = 100;
4081 else if (sig_qual < 1)
4082 sig_qual = 0;
4083
4084 return sig_qual;
4085 }
4086
4087 /**
4088 * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4089 *
4090 * Uses the priv->rx_handlers callback function array to invoke
4091 * the appropriate handlers, including command responses,
4092 * frame-received notifications, and other notifications.
4093 */
4094 static void iwl4965_rx_handle(struct iwl_priv *priv)
4095 {
4096 struct iwl4965_rx_mem_buffer *rxb;
4097 struct iwl4965_rx_packet *pkt;
4098 struct iwl4965_rx_queue *rxq = &priv->rxq;
4099 u32 r, i;
4100 int reclaim;
4101 unsigned long flags;
4102 u8 fill_rx = 0;
4103 u32 count = 8;
4104
4105 /* uCode's read index (stored in shared DRAM) indicates the last Rx
4106 * buffer that the driver may process (last buffer filled by ucode). */
4107 r = iwl4965_hw_get_rx_read(priv);
4108 i = rxq->read;
4109
4110 /* Rx interrupt, but nothing sent from uCode */
4111 if (i == r)
4112 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4113
4114 if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4115 fill_rx = 1;
4116
4117 while (i != r) {
4118 rxb = rxq->queue[i];
4119
4120 /* If an RXB doesn't have a Rx queue slot associated with it,
4121 * then a bug has been introduced in the queue refilling
4122 * routines -- catch it here */
4123 BUG_ON(rxb == NULL);
4124
4125 rxq->queue[i] = NULL;
4126
4127 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4128 priv->hw_setting.rx_buf_size,
4129 PCI_DMA_FROMDEVICE);
4130 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4131
4132 /* Reclaim a command buffer only if this packet is a response
4133 * to a (driver-originated) command.
4134 * If the packet (e.g. Rx frame) originated from uCode,
4135 * there is no command buffer to reclaim.
4136 * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4137 * but apparently a few don't get set; catch them here. */
4138 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4139 (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4140 (pkt->hdr.cmd != REPLY_RX) &&
4141 (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4142 (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4143 (pkt->hdr.cmd != REPLY_TX);
4144
4145 /* Based on type of command response or notification,
4146 * handle those that need handling via function in
4147 * rx_handlers table. See iwl4965_setup_rx_handlers() */
4148 if (priv->rx_handlers[pkt->hdr.cmd]) {
4149 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4150 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4151 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4152 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4153 } else {
4154 /* No handling needed */
4155 IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4156 "r %d i %d No handler needed for %s, 0x%02x\n",
4157 r, i, get_cmd_string(pkt->hdr.cmd),
4158 pkt->hdr.cmd);
4159 }
4160
4161 if (reclaim) {
4162 /* Invoke any callbacks, transfer the skb to caller, and
4163 * fire off the (possibly) blocking iwl_send_cmd()
4164 * as we reclaim the driver command queue */
4165 if (rxb && rxb->skb)
4166 iwl4965_tx_cmd_complete(priv, rxb);
4167 else
4168 IWL_WARNING("Claim null rxb?\n");
4169 }
4170
4171 /* For now we just don't re-use anything. We can tweak this
4172 * later to try and re-use notification packets and SKBs that
4173 * fail to Rx correctly */
4174 if (rxb->skb != NULL) {
4175 priv->alloc_rxb_skb--;
4176 dev_kfree_skb_any(rxb->skb);
4177 rxb->skb = NULL;
4178 }
4179
4180 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4181 priv->hw_setting.rx_buf_size,
4182 PCI_DMA_FROMDEVICE);
4183 spin_lock_irqsave(&rxq->lock, flags);
4184 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4185 spin_unlock_irqrestore(&rxq->lock, flags);
4186 i = (i + 1) & RX_QUEUE_MASK;
4187 /* If there are a lot of unused frames,
4188 * restock the Rx queue so ucode wont assert. */
4189 if (fill_rx) {
4190 count++;
4191 if (count >= 8) {
4192 priv->rxq.read = i;
4193 __iwl4965_rx_replenish(priv);
4194 count = 0;
4195 }
4196 }
4197 }
4198
4199 /* Backtrack one entry */
4200 priv->rxq.read = i;
4201 iwl4965_rx_queue_restock(priv);
4202 }
4203
4204 /**
4205 * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4206 */
4207 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4208 struct iwl4965_tx_queue *txq)
4209 {
4210 u32 reg = 0;
4211 int rc = 0;
4212 int txq_id = txq->q.id;
4213
4214 if (txq->need_update == 0)
4215 return rc;
4216
4217 /* if we're trying to save power */
4218 if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4219 /* wake up nic if it's powered down ...
4220 * uCode will wake up, and interrupt us again, so next
4221 * time we'll skip this part. */
4222 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4223
4224 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4225 IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4226 iwl_set_bit(priv, CSR_GP_CNTRL,
4227 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4228 return rc;
4229 }
4230
4231 /* restore this queue's parameters in nic hardware. */
4232 rc = iwl_grab_nic_access(priv);
4233 if (rc)
4234 return rc;
4235 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4236 txq->q.write_ptr | (txq_id << 8));
4237 iwl_release_nic_access(priv);
4238
4239 /* else not in power-save mode, uCode will never sleep when we're
4240 * trying to tx (during RFKILL, we're not trying to tx). */
4241 } else
4242 iwl_write32(priv, HBUS_TARG_WRPTR,
4243 txq->q.write_ptr | (txq_id << 8));
4244
4245 txq->need_update = 0;
4246
4247 return rc;
4248 }
4249
4250 #ifdef CONFIG_IWLWIFI_DEBUG
4251 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4252 {
4253 DECLARE_MAC_BUF(mac);
4254
4255 IWL_DEBUG_RADIO("RX CONFIG:\n");
4256 iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4257 IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4258 IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4259 IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4260 le32_to_cpu(rxon->filter_flags));
4261 IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4262 IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4263 rxon->ofdm_basic_rates);
4264 IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4265 IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4266 print_mac(mac, rxon->node_addr));
4267 IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4268 print_mac(mac, rxon->bssid_addr));
4269 IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4270 }
4271 #endif
4272
4273 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4274 {
4275 IWL_DEBUG_ISR("Enabling interrupts\n");
4276 set_bit(STATUS_INT_ENABLED, &priv->status);
4277 iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4278 }
4279
4280 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4281 {
4282 clear_bit(STATUS_INT_ENABLED, &priv->status);
4283
4284 /* disable interrupts from uCode/NIC to host */
4285 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4286
4287 /* acknowledge/clear/reset any interrupts still pending
4288 * from uCode or flow handler (Rx/Tx DMA) */
4289 iwl_write32(priv, CSR_INT, 0xffffffff);
4290 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4291 IWL_DEBUG_ISR("Disabled interrupts\n");
4292 }
4293
4294 static const char *desc_lookup(int i)
4295 {
4296 switch (i) {
4297 case 1:
4298 return "FAIL";
4299 case 2:
4300 return "BAD_PARAM";
4301 case 3:
4302 return "BAD_CHECKSUM";
4303 case 4:
4304 return "NMI_INTERRUPT";
4305 case 5:
4306 return "SYSASSERT";
4307 case 6:
4308 return "FATAL_ERROR";
4309 }
4310
4311 return "UNKNOWN";
4312 }
4313
4314 #define ERROR_START_OFFSET (1 * sizeof(u32))
4315 #define ERROR_ELEM_SIZE (7 * sizeof(u32))
4316
4317 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4318 {
4319 u32 data2, line;
4320 u32 desc, time, count, base, data1;
4321 u32 blink1, blink2, ilink1, ilink2;
4322 int rc;
4323
4324 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4325
4326 if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4327 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4328 return;
4329 }
4330
4331 rc = iwl_grab_nic_access(priv);
4332 if (rc) {
4333 IWL_WARNING("Can not read from adapter at this time.\n");
4334 return;
4335 }
4336
4337 count = iwl_read_targ_mem(priv, base);
4338
4339 if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4340 IWL_ERROR("Start IWL Error Log Dump:\n");
4341 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4342 }
4343
4344 desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4345 blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4346 blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4347 ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4348 ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4349 data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4350 data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4351 line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4352 time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4353
4354 IWL_ERROR("Desc Time "
4355 "data1 data2 line\n");
4356 IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4357 desc_lookup(desc), desc, time, data1, data2, line);
4358 IWL_ERROR("blink1 blink2 ilink1 ilink2\n");
4359 IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4360 ilink1, ilink2);
4361
4362 iwl_release_nic_access(priv);
4363 }
4364
4365 #define EVENT_START_OFFSET (4 * sizeof(u32))
4366
4367 /**
4368 * iwl4965_print_event_log - Dump error event log to syslog
4369 *
4370 * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4371 */
4372 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4373 u32 num_events, u32 mode)
4374 {
4375 u32 i;
4376 u32 base; /* SRAM byte address of event log header */
4377 u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4378 u32 ptr; /* SRAM byte address of log data */
4379 u32 ev, time, data; /* event log data */
4380
4381 if (num_events == 0)
4382 return;
4383
4384 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4385
4386 if (mode == 0)
4387 event_size = 2 * sizeof(u32);
4388 else
4389 event_size = 3 * sizeof(u32);
4390
4391 ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4392
4393 /* "time" is actually "data" for mode 0 (no timestamp).
4394 * place event id # at far right for easier visual parsing. */
4395 for (i = 0; i < num_events; i++) {
4396 ev = iwl_read_targ_mem(priv, ptr);
4397 ptr += sizeof(u32);
4398 time = iwl_read_targ_mem(priv, ptr);
4399 ptr += sizeof(u32);
4400 if (mode == 0)
4401 IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4402 else {
4403 data = iwl_read_targ_mem(priv, ptr);
4404 ptr += sizeof(u32);
4405 IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4406 }
4407 }
4408 }
4409
4410 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4411 {
4412 int rc;
4413 u32 base; /* SRAM byte address of event log header */
4414 u32 capacity; /* event log capacity in # entries */
4415 u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */
4416 u32 num_wraps; /* # times uCode wrapped to top of log */
4417 u32 next_entry; /* index of next entry to be written by uCode */
4418 u32 size; /* # entries that we'll print */
4419
4420 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4421 if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4422 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4423 return;
4424 }
4425
4426 rc = iwl_grab_nic_access(priv);
4427 if (rc) {
4428 IWL_WARNING("Can not read from adapter at this time.\n");
4429 return;
4430 }
4431
4432 /* event log header */
4433 capacity = iwl_read_targ_mem(priv, base);
4434 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4435 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4436 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4437
4438 size = num_wraps ? capacity : next_entry;
4439
4440 /* bail out if nothing in log */
4441 if (size == 0) {
4442 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4443 iwl_release_nic_access(priv);
4444 return;
4445 }
4446
4447 IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4448 size, num_wraps);
4449
4450 /* if uCode has wrapped back to top of log, start at the oldest entry,
4451 * i.e the next one that uCode would fill. */
4452 if (num_wraps)
4453 iwl4965_print_event_log(priv, next_entry,
4454 capacity - next_entry, mode);
4455
4456 /* (then/else) start at top of log */
4457 iwl4965_print_event_log(priv, 0, next_entry, mode);
4458
4459 iwl_release_nic_access(priv);
4460 }
4461
4462 /**
4463 * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4464 */
4465 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4466 {
4467 /* Set the FW error flag -- cleared on iwl4965_down */
4468 set_bit(STATUS_FW_ERROR, &priv->status);
4469
4470 /* Cancel currently queued command. */
4471 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4472
4473 #ifdef CONFIG_IWLWIFI_DEBUG
4474 if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4475 iwl4965_dump_nic_error_log(priv);
4476 iwl4965_dump_nic_event_log(priv);
4477 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4478 }
4479 #endif
4480
4481 wake_up_interruptible(&priv->wait_command_queue);
4482
4483 /* Keep the restart process from trying to send host
4484 * commands by clearing the INIT status bit */
4485 clear_bit(STATUS_READY, &priv->status);
4486
4487 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4488 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4489 "Restarting adapter due to uCode error.\n");
4490
4491 if (iwl4965_is_associated(priv)) {
4492 memcpy(&priv->recovery_rxon, &priv->active_rxon,
4493 sizeof(priv->recovery_rxon));
4494 priv->error_recovering = 1;
4495 }
4496 queue_work(priv->workqueue, &priv->restart);
4497 }
4498 }
4499
4500 static void iwl4965_error_recovery(struct iwl_priv *priv)
4501 {
4502 unsigned long flags;
4503
4504 memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4505 sizeof(priv->staging_rxon));
4506 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4507 iwl4965_commit_rxon(priv);
4508
4509 iwl4965_rxon_add_station(priv, priv->bssid, 1);
4510
4511 spin_lock_irqsave(&priv->lock, flags);
4512 priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4513 priv->error_recovering = 0;
4514 spin_unlock_irqrestore(&priv->lock, flags);
4515 }
4516
4517 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4518 {
4519 u32 inta, handled = 0;
4520 u32 inta_fh;
4521 unsigned long flags;
4522 #ifdef CONFIG_IWLWIFI_DEBUG
4523 u32 inta_mask;
4524 #endif
4525
4526 spin_lock_irqsave(&priv->lock, flags);
4527
4528 /* Ack/clear/reset pending uCode interrupts.
4529 * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4530 * and will clear only when CSR_FH_INT_STATUS gets cleared. */
4531 inta = iwl_read32(priv, CSR_INT);
4532 iwl_write32(priv, CSR_INT, inta);
4533
4534 /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4535 * Any new interrupts that happen after this, either while we're
4536 * in this tasklet, or later, will show up in next ISR/tasklet. */
4537 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4538 iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4539
4540 #ifdef CONFIG_IWLWIFI_DEBUG
4541 if (iwl_debug_level & IWL_DL_ISR) {
4542 /* just for debug */
4543 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4544 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4545 inta, inta_mask, inta_fh);
4546 }
4547 #endif
4548
4549 /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4550 * atomic, make sure that inta covers all the interrupts that
4551 * we've discovered, even if FH interrupt came in just after
4552 * reading CSR_INT. */
4553 if (inta_fh & CSR49_FH_INT_RX_MASK)
4554 inta |= CSR_INT_BIT_FH_RX;
4555 if (inta_fh & CSR49_FH_INT_TX_MASK)
4556 inta |= CSR_INT_BIT_FH_TX;
4557
4558 /* Now service all interrupt bits discovered above. */
4559 if (inta & CSR_INT_BIT_HW_ERR) {
4560 IWL_ERROR("Microcode HW error detected. Restarting.\n");
4561
4562 /* Tell the device to stop sending interrupts */
4563 iwl4965_disable_interrupts(priv);
4564
4565 iwl4965_irq_handle_error(priv);
4566
4567 handled |= CSR_INT_BIT_HW_ERR;
4568
4569 spin_unlock_irqrestore(&priv->lock, flags);
4570
4571 return;
4572 }
4573
4574 #ifdef CONFIG_IWLWIFI_DEBUG
4575 if (iwl_debug_level & (IWL_DL_ISR)) {
4576 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4577 if (inta & CSR_INT_BIT_SCD)
4578 IWL_DEBUG_ISR("Scheduler finished to transmit "
4579 "the frame/frames.\n");
4580
4581 /* Alive notification via Rx interrupt will do the real work */
4582 if (inta & CSR_INT_BIT_ALIVE)
4583 IWL_DEBUG_ISR("Alive interrupt\n");
4584 }
4585 #endif
4586 /* Safely ignore these bits for debug checks below */
4587 inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4588
4589 /* HW RF KILL switch toggled */
4590 if (inta & CSR_INT_BIT_RF_KILL) {
4591 int hw_rf_kill = 0;
4592 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4593 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4594 hw_rf_kill = 1;
4595
4596 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4597 "RF_KILL bit toggled to %s.\n",
4598 hw_rf_kill ? "disable radio":"enable radio");
4599
4600 /* Queue restart only if RF_KILL switch was set to "kill"
4601 * when we loaded driver, and is now set to "enable".
4602 * After we're Alive, RF_KILL gets handled by
4603 * iwl4965_rx_card_state_notif() */
4604 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4605 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4606 queue_work(priv->workqueue, &priv->restart);
4607 }
4608
4609 handled |= CSR_INT_BIT_RF_KILL;
4610 }
4611
4612 /* Chip got too hot and stopped itself */
4613 if (inta & CSR_INT_BIT_CT_KILL) {
4614 IWL_ERROR("Microcode CT kill error detected.\n");
4615 handled |= CSR_INT_BIT_CT_KILL;
4616 }
4617
4618 /* Error detected by uCode */
4619 if (inta & CSR_INT_BIT_SW_ERR) {
4620 IWL_ERROR("Microcode SW error detected. Restarting 0x%X.\n",
4621 inta);
4622 iwl4965_irq_handle_error(priv);
4623 handled |= CSR_INT_BIT_SW_ERR;
4624 }
4625
4626 /* uCode wakes up after power-down sleep */
4627 if (inta & CSR_INT_BIT_WAKEUP) {
4628 IWL_DEBUG_ISR("Wakeup interrupt\n");
4629 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4630 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4631 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4632 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4633 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4634 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4635 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4636
4637 handled |= CSR_INT_BIT_WAKEUP;
4638 }
4639
4640 /* All uCode command responses, including Tx command responses,
4641 * Rx "responses" (frame-received notification), and other
4642 * notifications from uCode come through here*/
4643 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4644 iwl4965_rx_handle(priv);
4645 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4646 }
4647
4648 if (inta & CSR_INT_BIT_FH_TX) {
4649 IWL_DEBUG_ISR("Tx interrupt\n");
4650 handled |= CSR_INT_BIT_FH_TX;
4651 }
4652
4653 if (inta & ~handled)
4654 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4655
4656 if (inta & ~CSR_INI_SET_MASK) {
4657 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4658 inta & ~CSR_INI_SET_MASK);
4659 IWL_WARNING(" with FH_INT = 0x%08x\n", inta_fh);
4660 }
4661
4662 /* Re-enable all interrupts */
4663 iwl4965_enable_interrupts(priv);
4664
4665 #ifdef CONFIG_IWLWIFI_DEBUG
4666 if (iwl_debug_level & (IWL_DL_ISR)) {
4667 inta = iwl_read32(priv, CSR_INT);
4668 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4669 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4670 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4671 "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4672 }
4673 #endif
4674 spin_unlock_irqrestore(&priv->lock, flags);
4675 }
4676
4677 static irqreturn_t iwl4965_isr(int irq, void *data)
4678 {
4679 struct iwl_priv *priv = data;
4680 u32 inta, inta_mask;
4681 u32 inta_fh;
4682 if (!priv)
4683 return IRQ_NONE;
4684
4685 spin_lock(&priv->lock);
4686
4687 /* Disable (but don't clear!) interrupts here to avoid
4688 * back-to-back ISRs and sporadic interrupts from our NIC.
4689 * If we have something to service, the tasklet will re-enable ints.
4690 * If we *don't* have something, we'll re-enable before leaving here. */
4691 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4692 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4693
4694 /* Discover which interrupts are active/pending */
4695 inta = iwl_read32(priv, CSR_INT);
4696 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4697
4698 /* Ignore interrupt if there's nothing in NIC to service.
4699 * This may be due to IRQ shared with another device,
4700 * or due to sporadic interrupts thrown from our NIC. */
4701 if (!inta && !inta_fh) {
4702 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4703 goto none;
4704 }
4705
4706 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4707 /* Hardware disappeared. It might have already raised
4708 * an interrupt */
4709 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4710 goto unplugged;
4711 }
4712
4713 IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4714 inta, inta_mask, inta_fh);
4715
4716 inta &= ~CSR_INT_BIT_SCD;
4717
4718 /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4719 if (likely(inta || inta_fh))
4720 tasklet_schedule(&priv->irq_tasklet);
4721
4722 unplugged:
4723 spin_unlock(&priv->lock);
4724 return IRQ_HANDLED;
4725
4726 none:
4727 /* re-enable interrupts here since we don't have anything to service. */
4728 iwl4965_enable_interrupts(priv);
4729 spin_unlock(&priv->lock);
4730 return IRQ_NONE;
4731 }
4732
4733 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4734 * sending probe req. This should be set long enough to hear probe responses
4735 * from more than one AP. */
4736 #define IWL_ACTIVE_DWELL_TIME_24 (20) /* all times in msec */
4737 #define IWL_ACTIVE_DWELL_TIME_52 (10)
4738
4739 /* For faster active scanning, scan will move to the next channel if fewer than
4740 * PLCP_QUIET_THRESH packets are heard on this channel within
4741 * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell
4742 * time if it's a quiet channel (nothing responded to our probe, and there's
4743 * no other traffic).
4744 * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4745 #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */
4746 #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(5) /* msec */
4747
4748 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4749 * Must be set longer than active dwell time.
4750 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4751 #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
4752 #define IWL_PASSIVE_DWELL_TIME_52 (10)
4753 #define IWL_PASSIVE_DWELL_BASE (100)
4754 #define IWL_CHANNEL_TUNE_TIME 5
4755
4756 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4757 enum ieee80211_band band)
4758 {
4759 if (band == IEEE80211_BAND_5GHZ)
4760 return IWL_ACTIVE_DWELL_TIME_52;
4761 else
4762 return IWL_ACTIVE_DWELL_TIME_24;
4763 }
4764
4765 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4766 enum ieee80211_band band)
4767 {
4768 u16 active = iwl4965_get_active_dwell_time(priv, band);
4769 u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4770 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4771 IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4772
4773 if (iwl4965_is_associated(priv)) {
4774 /* If we're associated, we clamp the maximum passive
4775 * dwell time to be 98% of the beacon interval (minus
4776 * 2 * channel tune time) */
4777 passive = priv->beacon_int;
4778 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4779 passive = IWL_PASSIVE_DWELL_BASE;
4780 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4781 }
4782
4783 if (passive <= active)
4784 passive = active + 1;
4785
4786 return passive;
4787 }
4788
4789 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4790 enum ieee80211_band band,
4791 u8 is_active, u8 direct_mask,
4792 struct iwl4965_scan_channel *scan_ch)
4793 {
4794 const struct ieee80211_channel *channels = NULL;
4795 const struct ieee80211_supported_band *sband;
4796 const struct iwl_channel_info *ch_info;
4797 u16 passive_dwell = 0;
4798 u16 active_dwell = 0;
4799 int added, i;
4800
4801 sband = iwl4965_get_hw_mode(priv, band);
4802 if (!sband)
4803 return 0;
4804
4805 channels = sband->channels;
4806
4807 active_dwell = iwl4965_get_active_dwell_time(priv, band);
4808 passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4809
4810 for (i = 0, added = 0; i < sband->n_channels; i++) {
4811 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
4812 le16_to_cpu(priv->active_rxon.channel)) {
4813 if (iwl4965_is_associated(priv)) {
4814 IWL_DEBUG_SCAN
4815 ("Skipping current channel %d\n",
4816 le16_to_cpu(priv->active_rxon.channel));
4817 continue;
4818 }
4819 } else if (priv->only_active_channel)
4820 continue;
4821
4822 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4823
4824 ch_info = iwl_get_channel_info(priv, band,
4825 scan_ch->channel);
4826 if (!is_channel_valid(ch_info)) {
4827 IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4828 scan_ch->channel);
4829 continue;
4830 }
4831
4832 if (!is_active || is_channel_passive(ch_info) ||
4833 (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4834 scan_ch->type = 0; /* passive */
4835 else
4836 scan_ch->type = 1; /* active */
4837
4838 if (scan_ch->type & 1)
4839 scan_ch->type |= (direct_mask << 1);
4840
4841 if (is_channel_narrow(ch_info))
4842 scan_ch->type |= (1 << 7);
4843
4844 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4845 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4846
4847 /* Set txpower levels to defaults */
4848 scan_ch->tpc.dsp_atten = 110;
4849 /* scan_pwr_info->tpc.dsp_atten; */
4850
4851 /*scan_pwr_info->tpc.tx_gain; */
4852 if (band == IEEE80211_BAND_5GHZ)
4853 scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4854 else {
4855 scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4856 /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4857 * power level:
4858 * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4859 */
4860 }
4861
4862 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4863 scan_ch->channel,
4864 (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4865 (scan_ch->type & 1) ?
4866 active_dwell : passive_dwell);
4867
4868 scan_ch++;
4869 added++;
4870 }
4871
4872 IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4873 return added;
4874 }
4875
4876 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4877 struct ieee80211_rate *rates)
4878 {
4879 int i;
4880
4881 for (i = 0; i < IWL_RATE_COUNT; i++) {
4882 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4883 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4884 rates[i].hw_value_short = i;
4885 rates[i].flags = 0;
4886 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4887 /*
4888 * If CCK != 1M then set short preamble rate flag.
4889 */
4890 rates[i].flags |=
4891 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4892 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4893 }
4894 }
4895 }
4896
4897 /**
4898 * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4899 */
4900 int iwl4965_init_geos(struct iwl_priv *priv)
4901 {
4902 struct iwl_channel_info *ch;
4903 struct ieee80211_supported_band *sband;
4904 struct ieee80211_channel *channels;
4905 struct ieee80211_channel *geo_ch;
4906 struct ieee80211_rate *rates;
4907 int i = 0;
4908
4909 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4910 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4911 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4912 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4913 return 0;
4914 }
4915
4916 channels = kzalloc(sizeof(struct ieee80211_channel) *
4917 priv->channel_count, GFP_KERNEL);
4918 if (!channels)
4919 return -ENOMEM;
4920
4921 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4922 GFP_KERNEL);
4923 if (!rates) {
4924 kfree(channels);
4925 return -ENOMEM;
4926 }
4927
4928 /* 5.2GHz channels start after the 2.4GHz channels */
4929 sband = &priv->bands[IEEE80211_BAND_5GHZ];
4930 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4931 /* just OFDM */
4932 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4933 sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4934
4935 iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4936
4937 sband = &priv->bands[IEEE80211_BAND_2GHZ];
4938 sband->channels = channels;
4939 /* OFDM & CCK */
4940 sband->bitrates = rates;
4941 sband->n_bitrates = IWL_RATE_COUNT;
4942
4943 iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4944
4945 priv->ieee_channels = channels;
4946 priv->ieee_rates = rates;
4947
4948 iwl4965_init_hw_rates(priv, rates);
4949
4950 for (i = 0; i < priv->channel_count; i++) {
4951 ch = &priv->channel_info[i];
4952
4953 /* FIXME: might be removed if scan is OK */
4954 if (!is_channel_valid(ch))
4955 continue;
4956
4957 if (is_channel_a_band(ch))
4958 sband = &priv->bands[IEEE80211_BAND_5GHZ];
4959 else
4960 sband = &priv->bands[IEEE80211_BAND_2GHZ];
4961
4962 geo_ch = &sband->channels[sband->n_channels++];
4963
4964 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4965 geo_ch->max_power = ch->max_power_avg;
4966 geo_ch->max_antenna_gain = 0xff;
4967 geo_ch->hw_value = ch->channel;
4968
4969 if (is_channel_valid(ch)) {
4970 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4971 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4972
4973 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4974 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4975
4976 if (ch->flags & EEPROM_CHANNEL_RADAR)
4977 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4978
4979 if (ch->max_power_avg > priv->max_channel_txpower_limit)
4980 priv->max_channel_txpower_limit =
4981 ch->max_power_avg;
4982 } else {
4983 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4984 }
4985
4986 /* Save flags for reg domain usage */
4987 geo_ch->orig_flags = geo_ch->flags;
4988
4989 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4990 ch->channel, geo_ch->center_freq,
4991 is_channel_a_band(ch) ? "5.2" : "2.4",
4992 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4993 "restricted" : "valid",
4994 geo_ch->flags);
4995 }
4996
4997 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4998 priv->cfg->sku & IWL_SKU_A) {
4999 printk(KERN_INFO DRV_NAME
5000 ": Incorrectly detected BG card as ABG. Please send "
5001 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5002 priv->pci_dev->device, priv->pci_dev->subsystem_device);
5003 priv->cfg->sku &= ~IWL_SKU_A;
5004 }
5005
5006 printk(KERN_INFO DRV_NAME
5007 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5008 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5009 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5010
5011 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5012 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5013 &priv->bands[IEEE80211_BAND_2GHZ];
5014 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5015 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5016 &priv->bands[IEEE80211_BAND_5GHZ];
5017
5018 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5019
5020 return 0;
5021 }
5022
5023 /*
5024 * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5025 */
5026 void iwl4965_free_geos(struct iwl_priv *priv)
5027 {
5028 kfree(priv->ieee_channels);
5029 kfree(priv->ieee_rates);
5030 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5031 }
5032
5033 /******************************************************************************
5034 *
5035 * uCode download functions
5036 *
5037 ******************************************************************************/
5038
5039 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
5040 {
5041 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5042 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5043 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5044 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5045 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5046 iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5047 }
5048
5049 /**
5050 * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5051 * looking at all data.
5052 */
5053 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
5054 u32 len)
5055 {
5056 u32 val;
5057 u32 save_len = len;
5058 int rc = 0;
5059 u32 errcnt;
5060
5061 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5062
5063 rc = iwl_grab_nic_access(priv);
5064 if (rc)
5065 return rc;
5066
5067 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5068
5069 errcnt = 0;
5070 for (; len > 0; len -= sizeof(u32), image++) {
5071 /* read data comes through single port, auto-incr addr */
5072 /* NOTE: Use the debugless read so we don't flood kernel log
5073 * if IWL_DL_IO is set */
5074 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5075 if (val != le32_to_cpu(*image)) {
5076 IWL_ERROR("uCode INST section is invalid at "
5077 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5078 save_len - len, val, le32_to_cpu(*image));
5079 rc = -EIO;
5080 errcnt++;
5081 if (errcnt >= 20)
5082 break;
5083 }
5084 }
5085
5086 iwl_release_nic_access(priv);
5087
5088 if (!errcnt)
5089 IWL_DEBUG_INFO
5090 ("ucode image in INSTRUCTION memory is good\n");
5091
5092 return rc;
5093 }
5094
5095
5096 /**
5097 * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5098 * using sample data 100 bytes apart. If these sample points are good,
5099 * it's a pretty good bet that everything between them is good, too.
5100 */
5101 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5102 {
5103 u32 val;
5104 int rc = 0;
5105 u32 errcnt = 0;
5106 u32 i;
5107
5108 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5109
5110 rc = iwl_grab_nic_access(priv);
5111 if (rc)
5112 return rc;
5113
5114 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5115 /* read data comes through single port, auto-incr addr */
5116 /* NOTE: Use the debugless read so we don't flood kernel log
5117 * if IWL_DL_IO is set */
5118 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5119 i + RTC_INST_LOWER_BOUND);
5120 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5121 if (val != le32_to_cpu(*image)) {
5122 #if 0 /* Enable this if you want to see details */
5123 IWL_ERROR("uCode INST section is invalid at "
5124 "offset 0x%x, is 0x%x, s/b 0x%x\n",
5125 i, val, *image);
5126 #endif
5127 rc = -EIO;
5128 errcnt++;
5129 if (errcnt >= 3)
5130 break;
5131 }
5132 }
5133
5134 iwl_release_nic_access(priv);
5135
5136 return rc;
5137 }
5138
5139
5140 /**
5141 * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5142 * and verify its contents
5143 */
5144 static int iwl4965_verify_ucode(struct iwl_priv *priv)
5145 {
5146 __le32 *image;
5147 u32 len;
5148 int rc = 0;
5149
5150 /* Try bootstrap */
5151 image = (__le32 *)priv->ucode_boot.v_addr;
5152 len = priv->ucode_boot.len;
5153 rc = iwl4965_verify_inst_sparse(priv, image, len);
5154 if (rc == 0) {
5155 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5156 return 0;
5157 }
5158
5159 /* Try initialize */
5160 image = (__le32 *)priv->ucode_init.v_addr;
5161 len = priv->ucode_init.len;
5162 rc = iwl4965_verify_inst_sparse(priv, image, len);
5163 if (rc == 0) {
5164 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5165 return 0;
5166 }
5167
5168 /* Try runtime/protocol */
5169 image = (__le32 *)priv->ucode_code.v_addr;
5170 len = priv->ucode_code.len;
5171 rc = iwl4965_verify_inst_sparse(priv, image, len);
5172 if (rc == 0) {
5173 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5174 return 0;
5175 }
5176
5177 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5178
5179 /* Since nothing seems to match, show first several data entries in
5180 * instruction SRAM, so maybe visual inspection will give a clue.
5181 * Selection of bootstrap image (vs. other images) is arbitrary. */
5182 image = (__le32 *)priv->ucode_boot.v_addr;
5183 len = priv->ucode_boot.len;
5184 rc = iwl4965_verify_inst_full(priv, image, len);
5185
5186 return rc;
5187 }
5188
5189
5190 /* check contents of special bootstrap uCode SRAM */
5191 static int iwl4965_verify_bsm(struct iwl_priv *priv)
5192 {
5193 __le32 *image = priv->ucode_boot.v_addr;
5194 u32 len = priv->ucode_boot.len;
5195 u32 reg;
5196 u32 val;
5197
5198 IWL_DEBUG_INFO("Begin verify bsm\n");
5199
5200 /* verify BSM SRAM contents */
5201 val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
5202 for (reg = BSM_SRAM_LOWER_BOUND;
5203 reg < BSM_SRAM_LOWER_BOUND + len;
5204 reg += sizeof(u32), image ++) {
5205 val = iwl_read_prph(priv, reg);
5206 if (val != le32_to_cpu(*image)) {
5207 IWL_ERROR("BSM uCode verification failed at "
5208 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5209 BSM_SRAM_LOWER_BOUND,
5210 reg - BSM_SRAM_LOWER_BOUND, len,
5211 val, le32_to_cpu(*image));
5212 return -EIO;
5213 }
5214 }
5215
5216 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5217
5218 return 0;
5219 }
5220
5221 /**
5222 * iwl4965_load_bsm - Load bootstrap instructions
5223 *
5224 * BSM operation:
5225 *
5226 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5227 * in special SRAM that does not power down during RFKILL. When powering back
5228 * up after power-saving sleeps (or during initial uCode load), the BSM loads
5229 * the bootstrap program into the on-board processor, and starts it.
5230 *
5231 * The bootstrap program loads (via DMA) instructions and data for a new
5232 * program from host DRAM locations indicated by the host driver in the
5233 * BSM_DRAM_* registers. Once the new program is loaded, it starts
5234 * automatically.
5235 *
5236 * When initializing the NIC, the host driver points the BSM to the
5237 * "initialize" uCode image. This uCode sets up some internal data, then
5238 * notifies host via "initialize alive" that it is complete.
5239 *
5240 * The host then replaces the BSM_DRAM_* pointer values to point to the
5241 * normal runtime uCode instructions and a backup uCode data cache buffer
5242 * (filled initially with starting data values for the on-board processor),
5243 * then triggers the "initialize" uCode to load and launch the runtime uCode,
5244 * which begins normal operation.
5245 *
5246 * When doing a power-save shutdown, runtime uCode saves data SRAM into
5247 * the backup data cache in DRAM before SRAM is powered down.
5248 *
5249 * When powering back up, the BSM loads the bootstrap program. This reloads
5250 * the runtime uCode instructions and the backup data cache into SRAM,
5251 * and re-launches the runtime uCode from where it left off.
5252 */
5253 static int iwl4965_load_bsm(struct iwl_priv *priv)
5254 {
5255 __le32 *image = priv->ucode_boot.v_addr;
5256 u32 len = priv->ucode_boot.len;
5257 dma_addr_t pinst;
5258 dma_addr_t pdata;
5259 u32 inst_len;
5260 u32 data_len;
5261 int rc;
5262 int i;
5263 u32 done;
5264 u32 reg_offset;
5265
5266 IWL_DEBUG_INFO("Begin load bsm\n");
5267
5268 /* make sure bootstrap program is no larger than BSM's SRAM size */
5269 if (len > IWL_MAX_BSM_SIZE)
5270 return -EINVAL;
5271
5272 /* Tell bootstrap uCode where to find the "Initialize" uCode
5273 * in host DRAM ... host DRAM physical address bits 35:4 for 4965.
5274 * NOTE: iwl4965_initialize_alive_start() will replace these values,
5275 * after the "initialize" uCode has run, to point to
5276 * runtime/protocol instructions and backup data cache. */
5277 pinst = priv->ucode_init.p_addr >> 4;
5278 pdata = priv->ucode_init_data.p_addr >> 4;
5279 inst_len = priv->ucode_init.len;
5280 data_len = priv->ucode_init_data.len;
5281
5282 rc = iwl_grab_nic_access(priv);
5283 if (rc)
5284 return rc;
5285
5286 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5287 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5288 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5289 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5290
5291 /* Fill BSM memory with bootstrap instructions */
5292 for (reg_offset = BSM_SRAM_LOWER_BOUND;
5293 reg_offset < BSM_SRAM_LOWER_BOUND + len;
5294 reg_offset += sizeof(u32), image++)
5295 _iwl_write_prph(priv, reg_offset,
5296 le32_to_cpu(*image));
5297
5298 rc = iwl4965_verify_bsm(priv);
5299 if (rc) {
5300 iwl_release_nic_access(priv);
5301 return rc;
5302 }
5303
5304 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5305 iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5306 iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
5307 RTC_INST_LOWER_BOUND);
5308 iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5309
5310 /* Load bootstrap code into instruction SRAM now,
5311 * to prepare to load "initialize" uCode */
5312 iwl_write_prph(priv, BSM_WR_CTRL_REG,
5313 BSM_WR_CTRL_REG_BIT_START);
5314
5315 /* Wait for load of bootstrap uCode to finish */
5316 for (i = 0; i < 100; i++) {
5317 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
5318 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5319 break;
5320 udelay(10);
5321 }
5322 if (i < 100)
5323 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5324 else {
5325 IWL_ERROR("BSM write did not complete!\n");
5326 return -EIO;
5327 }
5328
5329 /* Enable future boot loads whenever power management unit triggers it
5330 * (e.g. when powering back up after power-save shutdown) */
5331 iwl_write_prph(priv, BSM_WR_CTRL_REG,
5332 BSM_WR_CTRL_REG_BIT_START_EN);
5333
5334 iwl_release_nic_access(priv);
5335
5336 return 0;
5337 }
5338
5339 static void iwl4965_nic_start(struct iwl_priv *priv)
5340 {
5341 /* Remove all resets to allow NIC to operate */
5342 iwl_write32(priv, CSR_RESET, 0);
5343 }
5344
5345
5346 /**
5347 * iwl4965_read_ucode - Read uCode images from disk file.
5348 *
5349 * Copy into buffers for card to fetch via bus-mastering
5350 */
5351 static int iwl4965_read_ucode(struct iwl_priv *priv)
5352 {
5353 struct iwl4965_ucode *ucode;
5354 int ret;
5355 const struct firmware *ucode_raw;
5356 const char *name = priv->cfg->fw_name;
5357 u8 *src;
5358 size_t len;
5359 u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5360
5361 /* Ask kernel firmware_class module to get the boot firmware off disk.
5362 * request_firmware() is synchronous, file is in memory on return. */
5363 ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5364 if (ret < 0) {
5365 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5366 name, ret);
5367 goto error;
5368 }
5369
5370 IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5371 name, ucode_raw->size);
5372
5373 /* Make sure that we got at least our header! */
5374 if (ucode_raw->size < sizeof(*ucode)) {
5375 IWL_ERROR("File size way too small!\n");
5376 ret = -EINVAL;
5377 goto err_release;
5378 }
5379
5380 /* Data from ucode file: header followed by uCode images */
5381 ucode = (void *)ucode_raw->data;
5382
5383 ver = le32_to_cpu(ucode->ver);
5384 inst_size = le32_to_cpu(ucode->inst_size);
5385 data_size = le32_to_cpu(ucode->data_size);
5386 init_size = le32_to_cpu(ucode->init_size);
5387 init_data_size = le32_to_cpu(ucode->init_data_size);
5388 boot_size = le32_to_cpu(ucode->boot_size);
5389
5390 IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5391 IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5392 inst_size);
5393 IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5394 data_size);
5395 IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5396 init_size);
5397 IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5398 init_data_size);
5399 IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5400 boot_size);
5401
5402 /* Verify size of file vs. image size info in file's header */
5403 if (ucode_raw->size < sizeof(*ucode) +
5404 inst_size + data_size + init_size +
5405 init_data_size + boot_size) {
5406
5407 IWL_DEBUG_INFO("uCode file size %d too small\n",
5408 (int)ucode_raw->size);
5409 ret = -EINVAL;
5410 goto err_release;
5411 }
5412
5413 /* Verify that uCode images will fit in card's SRAM */
5414 if (inst_size > IWL_MAX_INST_SIZE) {
5415 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5416 inst_size);
5417 ret = -EINVAL;
5418 goto err_release;
5419 }
5420
5421 if (data_size > IWL_MAX_DATA_SIZE) {
5422 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5423 data_size);
5424 ret = -EINVAL;
5425 goto err_release;
5426 }
5427 if (init_size > IWL_MAX_INST_SIZE) {
5428 IWL_DEBUG_INFO
5429 ("uCode init instr len %d too large to fit in\n",
5430 init_size);
5431 ret = -EINVAL;
5432 goto err_release;
5433 }
5434 if (init_data_size > IWL_MAX_DATA_SIZE) {
5435 IWL_DEBUG_INFO
5436 ("uCode init data len %d too large to fit in\n",
5437 init_data_size);
5438 ret = -EINVAL;
5439 goto err_release;
5440 }
5441 if (boot_size > IWL_MAX_BSM_SIZE) {
5442 IWL_DEBUG_INFO
5443 ("uCode boot instr len %d too large to fit in\n",
5444 boot_size);
5445 ret = -EINVAL;
5446 goto err_release;
5447 }
5448
5449 /* Allocate ucode buffers for card's bus-master loading ... */
5450
5451 /* Runtime instructions and 2 copies of data:
5452 * 1) unmodified from disk
5453 * 2) backup cache for save/restore during power-downs */
5454 priv->ucode_code.len = inst_size;
5455 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5456
5457 priv->ucode_data.len = data_size;
5458 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5459
5460 priv->ucode_data_backup.len = data_size;
5461 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5462
5463 /* Initialization instructions and data */
5464 if (init_size && init_data_size) {
5465 priv->ucode_init.len = init_size;
5466 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5467
5468 priv->ucode_init_data.len = init_data_size;
5469 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5470
5471 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5472 goto err_pci_alloc;
5473 }
5474
5475 /* Bootstrap (instructions only, no data) */
5476 if (boot_size) {
5477 priv->ucode_boot.len = boot_size;
5478 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5479
5480 if (!priv->ucode_boot.v_addr)
5481 goto err_pci_alloc;
5482 }
5483
5484 /* Copy images into buffers for card's bus-master reads ... */
5485
5486 /* Runtime instructions (first block of data in file) */
5487 src = &ucode->data[0];
5488 len = priv->ucode_code.len;
5489 IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5490 memcpy(priv->ucode_code.v_addr, src, len);
5491 IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5492 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5493
5494 /* Runtime data (2nd block)
5495 * NOTE: Copy into backup buffer will be done in iwl4965_up() */
5496 src = &ucode->data[inst_size];
5497 len = priv->ucode_data.len;
5498 IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5499 memcpy(priv->ucode_data.v_addr, src, len);
5500 memcpy(priv->ucode_data_backup.v_addr, src, len);
5501
5502 /* Initialization instructions (3rd block) */
5503 if (init_size) {
5504 src = &ucode->data[inst_size + data_size];
5505 len = priv->ucode_init.len;
5506 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5507 len);
5508 memcpy(priv->ucode_init.v_addr, src, len);
5509 }
5510
5511 /* Initialization data (4th block) */
5512 if (init_data_size) {
5513 src = &ucode->data[inst_size + data_size + init_size];
5514 len = priv->ucode_init_data.len;
5515 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5516 len);
5517 memcpy(priv->ucode_init_data.v_addr, src, len);
5518 }
5519
5520 /* Bootstrap instructions (5th block) */
5521 src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5522 len = priv->ucode_boot.len;
5523 IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5524 memcpy(priv->ucode_boot.v_addr, src, len);
5525
5526 /* We have our copies now, allow OS release its copies */
5527 release_firmware(ucode_raw);
5528 return 0;
5529
5530 err_pci_alloc:
5531 IWL_ERROR("failed to allocate pci memory\n");
5532 ret = -ENOMEM;
5533 iwl4965_dealloc_ucode_pci(priv);
5534
5535 err_release:
5536 release_firmware(ucode_raw);
5537
5538 error:
5539 return ret;
5540 }
5541
5542
5543 /**
5544 * iwl4965_set_ucode_ptrs - Set uCode address location
5545 *
5546 * Tell initialization uCode where to find runtime uCode.
5547 *
5548 * BSM registers initially contain pointers to initialization uCode.
5549 * We need to replace them to load runtime uCode inst and data,
5550 * and to save runtime data when powering down.
5551 */
5552 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5553 {
5554 dma_addr_t pinst;
5555 dma_addr_t pdata;
5556 int rc = 0;
5557 unsigned long flags;
5558
5559 /* bits 35:4 for 4965 */
5560 pinst = priv->ucode_code.p_addr >> 4;
5561 pdata = priv->ucode_data_backup.p_addr >> 4;
5562
5563 spin_lock_irqsave(&priv->lock, flags);
5564 rc = iwl_grab_nic_access(priv);
5565 if (rc) {
5566 spin_unlock_irqrestore(&priv->lock, flags);
5567 return rc;
5568 }
5569
5570 /* Tell bootstrap uCode where to find image to load */
5571 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5572 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5573 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5574 priv->ucode_data.len);
5575
5576 /* Inst bytecount must be last to set up, bit 31 signals uCode
5577 * that all new ptr/size info is in place */
5578 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5579 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5580
5581 iwl_release_nic_access(priv);
5582
5583 spin_unlock_irqrestore(&priv->lock, flags);
5584
5585 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5586
5587 return rc;
5588 }
5589
5590 /**
5591 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5592 *
5593 * Called after REPLY_ALIVE notification received from "initialize" uCode.
5594 *
5595 * The 4965 "initialize" ALIVE reply contains calibration data for:
5596 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
5597 * (3945 does not contain this data).
5598 *
5599 * Tell "initialize" uCode to go ahead and load the runtime uCode.
5600 */
5601 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5602 {
5603 /* Check alive response for "valid" sign from uCode */
5604 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5605 /* We had an error bringing up the hardware, so take it
5606 * all the way back down so we can try again */
5607 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5608 goto restart;
5609 }
5610
5611 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5612 * This is a paranoid check, because we would not have gotten the
5613 * "initialize" alive if code weren't properly loaded. */
5614 if (iwl4965_verify_ucode(priv)) {
5615 /* Runtime instruction load was bad;
5616 * take it all the way back down so we can try again */
5617 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5618 goto restart;
5619 }
5620
5621 /* Calculate temperature */
5622 priv->temperature = iwl4965_get_temperature(priv);
5623
5624 /* Send pointers to protocol/runtime uCode image ... init code will
5625 * load and launch runtime uCode, which will send us another "Alive"
5626 * notification. */
5627 IWL_DEBUG_INFO("Initialization Alive received.\n");
5628 if (iwl4965_set_ucode_ptrs(priv)) {
5629 /* Runtime instruction load won't happen;
5630 * take it all the way back down so we can try again */
5631 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5632 goto restart;
5633 }
5634 return;
5635
5636 restart:
5637 queue_work(priv->workqueue, &priv->restart);
5638 }
5639
5640
5641 /**
5642 * iwl4965_alive_start - called after REPLY_ALIVE notification received
5643 * from protocol/runtime uCode (initialization uCode's
5644 * Alive gets handled by iwl4965_init_alive_start()).
5645 */
5646 static void iwl4965_alive_start(struct iwl_priv *priv)
5647 {
5648 int rc = 0;
5649
5650 IWL_DEBUG_INFO("Runtime Alive received.\n");
5651
5652 if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5653 /* We had an error bringing up the hardware, so take it
5654 * all the way back down so we can try again */
5655 IWL_DEBUG_INFO("Alive failed.\n");
5656 goto restart;
5657 }
5658
5659 /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5660 * This is a paranoid check, because we would not have gotten the
5661 * "runtime" alive if code weren't properly loaded. */
5662 if (iwl4965_verify_ucode(priv)) {
5663 /* Runtime instruction load was bad;
5664 * take it all the way back down so we can try again */
5665 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5666 goto restart;
5667 }
5668
5669 iwlcore_clear_stations_table(priv);
5670
5671 rc = iwl4965_alive_notify(priv);
5672 if (rc) {
5673 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5674 rc);
5675 goto restart;
5676 }
5677
5678 /* After the ALIVE response, we can send host commands to 4965 uCode */
5679 set_bit(STATUS_ALIVE, &priv->status);
5680
5681 /* Clear out the uCode error bit if it is set */
5682 clear_bit(STATUS_FW_ERROR, &priv->status);
5683
5684 if (iwl4965_is_rfkill(priv))
5685 return;
5686
5687 ieee80211_start_queues(priv->hw);
5688
5689 priv->active_rate = priv->rates_mask;
5690 priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5691
5692 iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5693
5694 if (iwl4965_is_associated(priv)) {
5695 struct iwl4965_rxon_cmd *active_rxon =
5696 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5697
5698 memcpy(&priv->staging_rxon, &priv->active_rxon,
5699 sizeof(priv->staging_rxon));
5700 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5701 } else {
5702 /* Initialize our rx_config data */
5703 iwl4965_connection_init_rx_config(priv);
5704 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5705 }
5706
5707 /* Configure Bluetooth device coexistence support */
5708 iwl4965_send_bt_config(priv);
5709
5710 /* Configure the adapter for unassociated operation */
5711 iwl4965_commit_rxon(priv);
5712
5713 /* At this point, the NIC is initialized and operational */
5714 priv->notif_missed_beacons = 0;
5715 set_bit(STATUS_READY, &priv->status);
5716
5717 iwl4965_rf_kill_ct_config(priv);
5718
5719 IWL_DEBUG_INFO("ALIVE processing complete.\n");
5720 wake_up_interruptible(&priv->wait_command_queue);
5721
5722 iwl_leds_register(priv);
5723
5724 if (priv->error_recovering)
5725 iwl4965_error_recovery(priv);
5726
5727 return;
5728
5729 restart:
5730 queue_work(priv->workqueue, &priv->restart);
5731 }
5732
5733 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5734
5735 static void __iwl4965_down(struct iwl_priv *priv)
5736 {
5737 unsigned long flags;
5738 int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5739 struct ieee80211_conf *conf = NULL;
5740
5741 IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5742
5743 conf = ieee80211_get_hw_conf(priv->hw);
5744
5745 if (!exit_pending)
5746 set_bit(STATUS_EXIT_PENDING, &priv->status);
5747
5748 iwl_leds_unregister(priv);
5749
5750 iwlcore_clear_stations_table(priv);
5751
5752 /* Unblock any waiting calls */
5753 wake_up_interruptible_all(&priv->wait_command_queue);
5754
5755 /* Wipe out the EXIT_PENDING status bit if we are not actually
5756 * exiting the module */
5757 if (!exit_pending)
5758 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5759
5760 /* stop and reset the on-board processor */
5761 iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5762
5763 /* tell the device to stop sending interrupts */
5764 iwl4965_disable_interrupts(priv);
5765
5766 if (priv->mac80211_registered)
5767 ieee80211_stop_queues(priv->hw);
5768
5769 /* If we have not previously called iwl4965_init() then
5770 * clear all bits but the RF Kill and SUSPEND bits and return */
5771 if (!iwl4965_is_init(priv)) {
5772 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5773 STATUS_RF_KILL_HW |
5774 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5775 STATUS_RF_KILL_SW |
5776 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5777 STATUS_GEO_CONFIGURED |
5778 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5779 STATUS_IN_SUSPEND;
5780 goto exit;
5781 }
5782
5783 /* ...otherwise clear out all the status bits but the RF Kill and
5784 * SUSPEND bits and continue taking the NIC down. */
5785 priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5786 STATUS_RF_KILL_HW |
5787 test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5788 STATUS_RF_KILL_SW |
5789 test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5790 STATUS_GEO_CONFIGURED |
5791 test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5792 STATUS_IN_SUSPEND |
5793 test_bit(STATUS_FW_ERROR, &priv->status) <<
5794 STATUS_FW_ERROR;
5795
5796 spin_lock_irqsave(&priv->lock, flags);
5797 iwl_clear_bit(priv, CSR_GP_CNTRL,
5798 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5799 spin_unlock_irqrestore(&priv->lock, flags);
5800
5801 iwl4965_hw_txq_ctx_stop(priv);
5802 iwl4965_hw_rxq_stop(priv);
5803
5804 spin_lock_irqsave(&priv->lock, flags);
5805 if (!iwl_grab_nic_access(priv)) {
5806 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5807 APMG_CLK_VAL_DMA_CLK_RQT);
5808 iwl_release_nic_access(priv);
5809 }
5810 spin_unlock_irqrestore(&priv->lock, flags);
5811
5812 udelay(5);
5813
5814 iwl4965_hw_nic_stop_master(priv);
5815 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5816 iwl4965_hw_nic_reset(priv);
5817
5818 exit:
5819 memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5820
5821 if (priv->ibss_beacon)
5822 dev_kfree_skb(priv->ibss_beacon);
5823 priv->ibss_beacon = NULL;
5824
5825 /* clear out any free frames */
5826 iwl4965_clear_free_frames(priv);
5827 }
5828
5829 static void iwl4965_down(struct iwl_priv *priv)
5830 {
5831 mutex_lock(&priv->mutex);
5832 __iwl4965_down(priv);
5833 mutex_unlock(&priv->mutex);
5834
5835 iwl4965_cancel_deferred_work(priv);
5836 }
5837
5838 #define MAX_HW_RESTARTS 5
5839
5840 static int __iwl4965_up(struct iwl_priv *priv)
5841 {
5842 int rc, i;
5843
5844 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5845 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5846 return -EIO;
5847 }
5848
5849 if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5850 IWL_WARNING("Radio disabled by SW RF kill (module "
5851 "parameter)\n");
5852 return -ENODEV;
5853 }
5854
5855 if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5856 IWL_ERROR("ucode not available for device bringup\n");
5857 return -EIO;
5858 }
5859
5860 /* If platform's RF_KILL switch is NOT set to KILL */
5861 if (iwl_read32(priv, CSR_GP_CNTRL) &
5862 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5863 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5864 else {
5865 set_bit(STATUS_RF_KILL_HW, &priv->status);
5866 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5867 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5868 return -ENODEV;
5869 }
5870 }
5871
5872 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5873
5874 rc = iwl4965_hw_nic_init(priv);
5875 if (rc) {
5876 IWL_ERROR("Unable to int nic\n");
5877 return rc;
5878 }
5879
5880 /* make sure rfkill handshake bits are cleared */
5881 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5882 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5883 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5884
5885 /* clear (again), then enable host interrupts */
5886 iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5887 iwl4965_enable_interrupts(priv);
5888
5889 /* really make sure rfkill handshake bits are cleared */
5890 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5891 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5892
5893 /* Copy original ucode data image from disk into backup cache.
5894 * This will be used to initialize the on-board processor's
5895 * data SRAM for a clean start when the runtime program first loads. */
5896 memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5897 priv->ucode_data.len);
5898
5899 /* We return success when we resume from suspend and rf_kill is on. */
5900 if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5901 return 0;
5902
5903 for (i = 0; i < MAX_HW_RESTARTS; i++) {
5904
5905 iwlcore_clear_stations_table(priv);
5906
5907 /* load bootstrap state machine,
5908 * load bootstrap program into processor's memory,
5909 * prepare to load the "initialize" uCode */
5910 rc = iwl4965_load_bsm(priv);
5911
5912 if (rc) {
5913 IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5914 continue;
5915 }
5916
5917 /* start card; "initialize" will load runtime ucode */
5918 iwl4965_nic_start(priv);
5919
5920 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5921
5922 return 0;
5923 }
5924
5925 set_bit(STATUS_EXIT_PENDING, &priv->status);
5926 __iwl4965_down(priv);
5927
5928 /* tried to restart and config the device for as long as our
5929 * patience could withstand */
5930 IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5931 return -EIO;
5932 }
5933
5934
5935 /*****************************************************************************
5936 *
5937 * Workqueue callbacks
5938 *
5939 *****************************************************************************/
5940
5941 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5942 {
5943 struct iwl_priv *priv =
5944 container_of(data, struct iwl_priv, init_alive_start.work);
5945
5946 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5947 return;
5948
5949 mutex_lock(&priv->mutex);
5950 iwl4965_init_alive_start(priv);
5951 mutex_unlock(&priv->mutex);
5952 }
5953
5954 static void iwl4965_bg_alive_start(struct work_struct *data)
5955 {
5956 struct iwl_priv *priv =
5957 container_of(data, struct iwl_priv, alive_start.work);
5958
5959 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5960 return;
5961
5962 mutex_lock(&priv->mutex);
5963 iwl4965_alive_start(priv);
5964 mutex_unlock(&priv->mutex);
5965 }
5966
5967 static void iwl4965_bg_rf_kill(struct work_struct *work)
5968 {
5969 struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5970
5971 wake_up_interruptible(&priv->wait_command_queue);
5972
5973 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5974 return;
5975
5976 mutex_lock(&priv->mutex);
5977
5978 if (!iwl4965_is_rfkill(priv)) {
5979 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5980 "HW and/or SW RF Kill no longer active, restarting "
5981 "device\n");
5982 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5983 queue_work(priv->workqueue, &priv->restart);
5984 } else {
5985
5986 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5987 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5988 "disabled by SW switch\n");
5989 else
5990 IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5991 "Kill switch must be turned off for "
5992 "wireless networking to work.\n");
5993 }
5994 mutex_unlock(&priv->mutex);
5995 }
5996
5997 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5998
5999 static void iwl4965_bg_scan_check(struct work_struct *data)
6000 {
6001 struct iwl_priv *priv =
6002 container_of(data, struct iwl_priv, scan_check.work);
6003
6004 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6005 return;
6006
6007 mutex_lock(&priv->mutex);
6008 if (test_bit(STATUS_SCANNING, &priv->status) ||
6009 test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6010 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6011 "Scan completion watchdog resetting adapter (%dms)\n",
6012 jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6013
6014 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6015 iwl4965_send_scan_abort(priv);
6016 }
6017 mutex_unlock(&priv->mutex);
6018 }
6019
6020 static void iwl4965_bg_request_scan(struct work_struct *data)
6021 {
6022 struct iwl_priv *priv =
6023 container_of(data, struct iwl_priv, request_scan);
6024 struct iwl_host_cmd cmd = {
6025 .id = REPLY_SCAN_CMD,
6026 .len = sizeof(struct iwl4965_scan_cmd),
6027 .meta.flags = CMD_SIZE_HUGE,
6028 };
6029 struct iwl4965_scan_cmd *scan;
6030 struct ieee80211_conf *conf = NULL;
6031 u16 cmd_len;
6032 enum ieee80211_band band;
6033 u8 direct_mask;
6034 int ret = 0;
6035
6036 conf = ieee80211_get_hw_conf(priv->hw);
6037
6038 mutex_lock(&priv->mutex);
6039
6040 if (!iwl4965_is_ready(priv)) {
6041 IWL_WARNING("request scan called when driver not ready.\n");
6042 goto done;
6043 }
6044
6045 /* Make sure the scan wasn't cancelled before this queued work
6046 * was given the chance to run... */
6047 if (!test_bit(STATUS_SCANNING, &priv->status))
6048 goto done;
6049
6050 /* This should never be called or scheduled if there is currently
6051 * a scan active in the hardware. */
6052 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6053 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6054 "Ignoring second request.\n");
6055 ret = -EIO;
6056 goto done;
6057 }
6058
6059 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6060 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6061 goto done;
6062 }
6063
6064 if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6065 IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n");
6066 goto done;
6067 }
6068
6069 if (iwl4965_is_rfkill(priv)) {
6070 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6071 goto done;
6072 }
6073
6074 if (!test_bit(STATUS_READY, &priv->status)) {
6075 IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n");
6076 goto done;
6077 }
6078
6079 if (!priv->scan_bands) {
6080 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6081 goto done;
6082 }
6083
6084 if (!priv->scan) {
6085 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6086 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6087 if (!priv->scan) {
6088 ret = -ENOMEM;
6089 goto done;
6090 }
6091 }
6092 scan = priv->scan;
6093 memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6094
6095 scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6096 scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6097
6098 if (iwl4965_is_associated(priv)) {
6099 u16 interval = 0;
6100 u32 extra;
6101 u32 suspend_time = 100;
6102 u32 scan_suspend_time = 100;
6103 unsigned long flags;
6104
6105 IWL_DEBUG_INFO("Scanning while associated...\n");
6106
6107 spin_lock_irqsave(&priv->lock, flags);
6108 interval = priv->beacon_int;
6109 spin_unlock_irqrestore(&priv->lock, flags);
6110
6111 scan->suspend_time = 0;
6112 scan->max_out_time = cpu_to_le32(200 * 1024);
6113 if (!interval)
6114 interval = suspend_time;
6115
6116 extra = (suspend_time / interval) << 22;
6117 scan_suspend_time = (extra |
6118 ((suspend_time % interval) * 1024));
6119 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6120 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6121 scan_suspend_time, interval);
6122 }
6123
6124 /* We should add the ability for user to lock to PASSIVE ONLY */
6125 if (priv->one_direct_scan) {
6126 IWL_DEBUG_SCAN
6127 ("Kicking off one direct scan for '%s'\n",
6128 iwl4965_escape_essid(priv->direct_ssid,
6129 priv->direct_ssid_len));
6130 scan->direct_scan[0].id = WLAN_EID_SSID;
6131 scan->direct_scan[0].len = priv->direct_ssid_len;
6132 memcpy(scan->direct_scan[0].ssid,
6133 priv->direct_ssid, priv->direct_ssid_len);
6134 direct_mask = 1;
6135 } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
6136 scan->direct_scan[0].id = WLAN_EID_SSID;
6137 scan->direct_scan[0].len = priv->essid_len;
6138 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6139 direct_mask = 1;
6140 } else {
6141 direct_mask = 0;
6142 }
6143
6144 scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6145 scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6146 scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6147
6148
6149 switch (priv->scan_bands) {
6150 case 2:
6151 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6152 scan->tx_cmd.rate_n_flags =
6153 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6154 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6155
6156 scan->good_CRC_th = 0;
6157 band = IEEE80211_BAND_2GHZ;
6158 break;
6159
6160 case 1:
6161 scan->tx_cmd.rate_n_flags =
6162 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6163 RATE_MCS_ANT_B_MSK);
6164 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6165 band = IEEE80211_BAND_5GHZ;
6166 break;
6167
6168 default:
6169 IWL_WARNING("Invalid scan band count\n");
6170 goto done;
6171 }
6172
6173 /* We don't build a direct scan probe request; the uCode will do
6174 * that based on the direct_mask added to each channel entry */
6175 cmd_len = iwl4965_fill_probe_req(priv, band,
6176 (struct ieee80211_mgmt *)scan->data,
6177 IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
6178
6179 scan->tx_cmd.len = cpu_to_le16(cmd_len);
6180 /* select Rx chains */
6181
6182 /* Force use of chains B and C (0x6) for scan Rx.
6183 * Avoid A (0x1) because of its off-channel reception on A-band.
6184 * MIMO is not used here, but value is required to make uCode happy. */
6185 scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
6186 cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
6187 (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
6188 (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
6189
6190 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6191 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6192
6193 if (direct_mask) {
6194 IWL_DEBUG_SCAN
6195 ("Initiating direct scan for %s.\n",
6196 iwl4965_escape_essid(priv->essid, priv->essid_len));
6197 scan->channel_count =
6198 iwl4965_get_channels_for_scan(
6199 priv, band, 1, /* active */
6200 direct_mask,
6201 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6202 } else {
6203 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6204 scan->channel_count =
6205 iwl4965_get_channels_for_scan(
6206 priv, band, 0, /* passive */
6207 direct_mask,
6208 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6209 }
6210
6211 cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6212 scan->channel_count * sizeof(struct iwl4965_scan_channel);
6213 cmd.data = scan;
6214 scan->len = cpu_to_le16(cmd.len);
6215
6216 set_bit(STATUS_SCAN_HW, &priv->status);
6217 ret = iwl_send_cmd_sync(priv, &cmd);
6218 if (ret)
6219 goto done;
6220
6221 queue_delayed_work(priv->workqueue, &priv->scan_check,
6222 IWL_SCAN_CHECK_WATCHDOG);
6223
6224 mutex_unlock(&priv->mutex);
6225 return;
6226
6227 done:
6228 /* inform mac80211 scan aborted */
6229 queue_work(priv->workqueue, &priv->scan_completed);
6230 mutex_unlock(&priv->mutex);
6231 }
6232
6233 static void iwl4965_bg_up(struct work_struct *data)
6234 {
6235 struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6236
6237 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6238 return;
6239
6240 mutex_lock(&priv->mutex);
6241 __iwl4965_up(priv);
6242 mutex_unlock(&priv->mutex);
6243 }
6244
6245 static void iwl4965_bg_restart(struct work_struct *data)
6246 {
6247 struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6248
6249 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6250 return;
6251
6252 iwl4965_down(priv);
6253 queue_work(priv->workqueue, &priv->up);
6254 }
6255
6256 static void iwl4965_bg_rx_replenish(struct work_struct *data)
6257 {
6258 struct iwl_priv *priv =
6259 container_of(data, struct iwl_priv, rx_replenish);
6260
6261 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6262 return;
6263
6264 mutex_lock(&priv->mutex);
6265 iwl4965_rx_replenish(priv);
6266 mutex_unlock(&priv->mutex);
6267 }
6268
6269 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6270
6271 static void iwl4965_bg_post_associate(struct work_struct *data)
6272 {
6273 struct iwl_priv *priv = container_of(data, struct iwl_priv,
6274 post_associate.work);
6275 struct ieee80211_conf *conf = NULL;
6276 int ret = 0;
6277 DECLARE_MAC_BUF(mac);
6278
6279 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6280 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6281 return;
6282 }
6283
6284 IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6285 priv->assoc_id,
6286 print_mac(mac, priv->active_rxon.bssid_addr));
6287
6288
6289 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6290 return;
6291
6292 mutex_lock(&priv->mutex);
6293
6294 if (!priv->vif || !priv->is_open) {
6295 mutex_unlock(&priv->mutex);
6296 return;
6297 }
6298 iwl4965_scan_cancel_timeout(priv, 200);
6299
6300 conf = ieee80211_get_hw_conf(priv->hw);
6301
6302 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6303 iwl4965_commit_rxon(priv);
6304
6305 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6306 iwl4965_setup_rxon_timing(priv);
6307 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6308 sizeof(priv->rxon_timing), &priv->rxon_timing);
6309 if (ret)
6310 IWL_WARNING("REPLY_RXON_TIMING failed - "
6311 "Attempting to continue.\n");
6312
6313 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6314
6315 #ifdef CONFIG_IWL4965_HT
6316 if (priv->current_ht_config.is_ht)
6317 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6318 #endif /* CONFIG_IWL4965_HT*/
6319 iwl4965_set_rxon_chain(priv);
6320 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6321
6322 IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6323 priv->assoc_id, priv->beacon_int);
6324
6325 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6326 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6327 else
6328 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6329
6330 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6331 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6332 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6333 else
6334 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6335
6336 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6337 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6338
6339 }
6340
6341 iwl4965_commit_rxon(priv);
6342
6343 switch (priv->iw_mode) {
6344 case IEEE80211_IF_TYPE_STA:
6345 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6346 break;
6347
6348 case IEEE80211_IF_TYPE_IBSS:
6349
6350 /* clear out the station table */
6351 iwlcore_clear_stations_table(priv);
6352
6353 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6354 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6355 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6356 iwl4965_send_beacon_cmd(priv);
6357
6358 break;
6359
6360 default:
6361 IWL_ERROR("%s Should not be called in %d mode\n",
6362 __FUNCTION__, priv->iw_mode);
6363 break;
6364 }
6365
6366 iwl4965_sequence_reset(priv);
6367
6368 #ifdef CONFIG_IWL4965_SENSITIVITY
6369 /* Enable Rx differential gain and sensitivity calibrations */
6370 iwl4965_chain_noise_reset(priv);
6371 priv->start_calib = 1;
6372 #endif /* CONFIG_IWL4965_SENSITIVITY */
6373
6374 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6375 priv->assoc_station_added = 1;
6376
6377 iwl4965_activate_qos(priv, 0);
6378
6379 /* we have just associated, don't start scan too early */
6380 priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6381 mutex_unlock(&priv->mutex);
6382 }
6383
6384 static void iwl4965_bg_abort_scan(struct work_struct *work)
6385 {
6386 struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6387
6388 if (!iwl4965_is_ready(priv))
6389 return;
6390
6391 mutex_lock(&priv->mutex);
6392
6393 set_bit(STATUS_SCAN_ABORTING, &priv->status);
6394 iwl4965_send_scan_abort(priv);
6395
6396 mutex_unlock(&priv->mutex);
6397 }
6398
6399 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6400
6401 static void iwl4965_bg_scan_completed(struct work_struct *work)
6402 {
6403 struct iwl_priv *priv =
6404 container_of(work, struct iwl_priv, scan_completed);
6405
6406 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6407
6408 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6409 return;
6410
6411 if (test_bit(STATUS_CONF_PENDING, &priv->status))
6412 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6413
6414 ieee80211_scan_completed(priv->hw);
6415
6416 /* Since setting the TXPOWER may have been deferred while
6417 * performing the scan, fire one off */
6418 mutex_lock(&priv->mutex);
6419 iwl4965_hw_reg_send_txpower(priv);
6420 mutex_unlock(&priv->mutex);
6421 }
6422
6423 /*****************************************************************************
6424 *
6425 * mac80211 entry point functions
6426 *
6427 *****************************************************************************/
6428
6429 #define UCODE_READY_TIMEOUT (2 * HZ)
6430
6431 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6432 {
6433 struct iwl_priv *priv = hw->priv;
6434 int ret;
6435
6436 IWL_DEBUG_MAC80211("enter\n");
6437
6438 if (pci_enable_device(priv->pci_dev)) {
6439 IWL_ERROR("Fail to pci_enable_device\n");
6440 return -ENODEV;
6441 }
6442 pci_restore_state(priv->pci_dev);
6443 pci_enable_msi(priv->pci_dev);
6444
6445 ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6446 DRV_NAME, priv);
6447 if (ret) {
6448 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6449 goto out_disable_msi;
6450 }
6451
6452 /* we should be verifying the device is ready to be opened */
6453 mutex_lock(&priv->mutex);
6454
6455 memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6456 /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6457 * ucode filename and max sizes are card-specific. */
6458
6459 if (!priv->ucode_code.len) {
6460 ret = iwl4965_read_ucode(priv);
6461 if (ret) {
6462 IWL_ERROR("Could not read microcode: %d\n", ret);
6463 mutex_unlock(&priv->mutex);
6464 goto out_release_irq;
6465 }
6466 }
6467
6468 ret = __iwl4965_up(priv);
6469
6470 mutex_unlock(&priv->mutex);
6471
6472 if (ret)
6473 goto out_release_irq;
6474
6475 IWL_DEBUG_INFO("Start UP work done.\n");
6476
6477 if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6478 return 0;
6479
6480 /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6481 * mac80211 will not be run successfully. */
6482 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6483 test_bit(STATUS_READY, &priv->status),
6484 UCODE_READY_TIMEOUT);
6485 if (!ret) {
6486 if (!test_bit(STATUS_READY, &priv->status)) {
6487 IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6488 jiffies_to_msecs(UCODE_READY_TIMEOUT));
6489 ret = -ETIMEDOUT;
6490 goto out_release_irq;
6491 }
6492 }
6493
6494 priv->is_open = 1;
6495 IWL_DEBUG_MAC80211("leave\n");
6496 return 0;
6497
6498 out_release_irq:
6499 free_irq(priv->pci_dev->irq, priv);
6500 out_disable_msi:
6501 pci_disable_msi(priv->pci_dev);
6502 pci_disable_device(priv->pci_dev);
6503 priv->is_open = 0;
6504 IWL_DEBUG_MAC80211("leave - failed\n");
6505 return ret;
6506 }
6507
6508 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6509 {
6510 struct iwl_priv *priv = hw->priv;
6511
6512 IWL_DEBUG_MAC80211("enter\n");
6513
6514 if (!priv->is_open) {
6515 IWL_DEBUG_MAC80211("leave - skip\n");
6516 return;
6517 }
6518
6519 priv->is_open = 0;
6520
6521 if (iwl4965_is_ready_rf(priv)) {
6522 /* stop mac, cancel any scan request and clear
6523 * RXON_FILTER_ASSOC_MSK BIT
6524 */
6525 mutex_lock(&priv->mutex);
6526 iwl4965_scan_cancel_timeout(priv, 100);
6527 cancel_delayed_work(&priv->post_associate);
6528 mutex_unlock(&priv->mutex);
6529 }
6530
6531 iwl4965_down(priv);
6532
6533 flush_workqueue(priv->workqueue);
6534 free_irq(priv->pci_dev->irq, priv);
6535 pci_disable_msi(priv->pci_dev);
6536 pci_save_state(priv->pci_dev);
6537 pci_disable_device(priv->pci_dev);
6538
6539 IWL_DEBUG_MAC80211("leave\n");
6540 }
6541
6542 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6543 struct ieee80211_tx_control *ctl)
6544 {
6545 struct iwl_priv *priv = hw->priv;
6546
6547 IWL_DEBUG_MAC80211("enter\n");
6548
6549 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6550 IWL_DEBUG_MAC80211("leave - monitor\n");
6551 return -1;
6552 }
6553
6554 IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6555 ctl->tx_rate->bitrate);
6556
6557 if (iwl4965_tx_skb(priv, skb, ctl))
6558 dev_kfree_skb_any(skb);
6559
6560 IWL_DEBUG_MAC80211("leave\n");
6561 return 0;
6562 }
6563
6564 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6565 struct ieee80211_if_init_conf *conf)
6566 {
6567 struct iwl_priv *priv = hw->priv;
6568 unsigned long flags;
6569 DECLARE_MAC_BUF(mac);
6570
6571 IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6572
6573 if (priv->vif) {
6574 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6575 return -EOPNOTSUPP;
6576 }
6577
6578 spin_lock_irqsave(&priv->lock, flags);
6579 priv->vif = conf->vif;
6580
6581 spin_unlock_irqrestore(&priv->lock, flags);
6582
6583 mutex_lock(&priv->mutex);
6584
6585 if (conf->mac_addr) {
6586 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6587 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6588 }
6589
6590 if (iwl4965_is_ready(priv))
6591 iwl4965_set_mode(priv, conf->type);
6592
6593 mutex_unlock(&priv->mutex);
6594
6595 IWL_DEBUG_MAC80211("leave\n");
6596 return 0;
6597 }
6598
6599 /**
6600 * iwl4965_mac_config - mac80211 config callback
6601 *
6602 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6603 * be set inappropriately and the driver currently sets the hardware up to
6604 * use it whenever needed.
6605 */
6606 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6607 {
6608 struct iwl_priv *priv = hw->priv;
6609 const struct iwl_channel_info *ch_info;
6610 unsigned long flags;
6611 int ret = 0;
6612
6613 mutex_lock(&priv->mutex);
6614 IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6615
6616 priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6617
6618 if (!iwl4965_is_ready(priv)) {
6619 IWL_DEBUG_MAC80211("leave - not ready\n");
6620 ret = -EIO;
6621 goto out;
6622 }
6623
6624 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6625 test_bit(STATUS_SCANNING, &priv->status))) {
6626 IWL_DEBUG_MAC80211("leave - scanning\n");
6627 set_bit(STATUS_CONF_PENDING, &priv->status);
6628 mutex_unlock(&priv->mutex);
6629 return 0;
6630 }
6631
6632 spin_lock_irqsave(&priv->lock, flags);
6633
6634 ch_info = iwl_get_channel_info(priv, conf->channel->band,
6635 ieee80211_frequency_to_channel(conf->channel->center_freq));
6636 if (!is_channel_valid(ch_info)) {
6637 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6638 spin_unlock_irqrestore(&priv->lock, flags);
6639 ret = -EINVAL;
6640 goto out;
6641 }
6642
6643 #ifdef CONFIG_IWL4965_HT
6644 /* if we are switching from ht to 2.4 clear flags
6645 * from any ht related info since 2.4 does not
6646 * support ht */
6647 if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6648 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6649 && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6650 #endif
6651 )
6652 priv->staging_rxon.flags = 0;
6653 #endif /* CONFIG_IWL4965_HT */
6654
6655 iwlcore_set_rxon_channel(priv, conf->channel->band,
6656 ieee80211_frequency_to_channel(conf->channel->center_freq));
6657
6658 iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6659
6660 /* The list of supported rates and rate mask can be different
6661 * for each band; since the band may have changed, reset
6662 * the rate mask to what mac80211 lists */
6663 iwl4965_set_rate(priv);
6664
6665 spin_unlock_irqrestore(&priv->lock, flags);
6666
6667 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6668 if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6669 iwl4965_hw_channel_switch(priv, conf->channel);
6670 goto out;
6671 }
6672 #endif
6673
6674 iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
6675
6676 if (!conf->radio_enabled) {
6677 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6678 goto out;
6679 }
6680
6681 if (iwl4965_is_rfkill(priv)) {
6682 IWL_DEBUG_MAC80211("leave - RF kill\n");
6683 ret = -EIO;
6684 goto out;
6685 }
6686
6687 iwl4965_set_rate(priv);
6688
6689 if (memcmp(&priv->active_rxon,
6690 &priv->staging_rxon, sizeof(priv->staging_rxon)))
6691 iwl4965_commit_rxon(priv);
6692 else
6693 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6694
6695 IWL_DEBUG_MAC80211("leave\n");
6696
6697 out:
6698 clear_bit(STATUS_CONF_PENDING, &priv->status);
6699 mutex_unlock(&priv->mutex);
6700 return ret;
6701 }
6702
6703 static void iwl4965_config_ap(struct iwl_priv *priv)
6704 {
6705 int ret = 0;
6706
6707 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6708 return;
6709
6710 /* The following should be done only at AP bring up */
6711 if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6712
6713 /* RXON - unassoc (to set timing command) */
6714 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6715 iwl4965_commit_rxon(priv);
6716
6717 /* RXON Timing */
6718 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6719 iwl4965_setup_rxon_timing(priv);
6720 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6721 sizeof(priv->rxon_timing), &priv->rxon_timing);
6722 if (ret)
6723 IWL_WARNING("REPLY_RXON_TIMING failed - "
6724 "Attempting to continue.\n");
6725
6726 iwl4965_set_rxon_chain(priv);
6727
6728 /* FIXME: what should be the assoc_id for AP? */
6729 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6730 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6731 priv->staging_rxon.flags |=
6732 RXON_FLG_SHORT_PREAMBLE_MSK;
6733 else
6734 priv->staging_rxon.flags &=
6735 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6736
6737 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6738 if (priv->assoc_capability &
6739 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6740 priv->staging_rxon.flags |=
6741 RXON_FLG_SHORT_SLOT_MSK;
6742 else
6743 priv->staging_rxon.flags &=
6744 ~RXON_FLG_SHORT_SLOT_MSK;
6745
6746 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6747 priv->staging_rxon.flags &=
6748 ~RXON_FLG_SHORT_SLOT_MSK;
6749 }
6750 /* restore RXON assoc */
6751 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6752 iwl4965_commit_rxon(priv);
6753 iwl4965_activate_qos(priv, 1);
6754 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6755 }
6756 iwl4965_send_beacon_cmd(priv);
6757
6758 /* FIXME - we need to add code here to detect a totally new
6759 * configuration, reset the AP, unassoc, rxon timing, assoc,
6760 * clear sta table, add BCAST sta... */
6761 }
6762
6763 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6764 struct ieee80211_vif *vif,
6765 struct ieee80211_if_conf *conf)
6766 {
6767 struct iwl_priv *priv = hw->priv;
6768 DECLARE_MAC_BUF(mac);
6769 unsigned long flags;
6770 int rc;
6771
6772 if (conf == NULL)
6773 return -EIO;
6774
6775 if (priv->vif != vif) {
6776 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6777 mutex_unlock(&priv->mutex);
6778 return 0;
6779 }
6780
6781 if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6782 (!conf->beacon || !conf->ssid_len)) {
6783 IWL_DEBUG_MAC80211
6784 ("Leaving in AP mode because HostAPD is not ready.\n");
6785 return 0;
6786 }
6787
6788 if (!iwl4965_is_alive(priv))
6789 return -EAGAIN;
6790
6791 mutex_lock(&priv->mutex);
6792
6793 if (conf->bssid)
6794 IWL_DEBUG_MAC80211("bssid: %s\n",
6795 print_mac(mac, conf->bssid));
6796
6797 /*
6798 * very dubious code was here; the probe filtering flag is never set:
6799 *
6800 if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6801 !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6802 */
6803
6804 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6805 if (!conf->bssid) {
6806 conf->bssid = priv->mac_addr;
6807 memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6808 IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6809 print_mac(mac, conf->bssid));
6810 }
6811 if (priv->ibss_beacon)
6812 dev_kfree_skb(priv->ibss_beacon);
6813
6814 priv->ibss_beacon = conf->beacon;
6815 }
6816
6817 if (iwl4965_is_rfkill(priv))
6818 goto done;
6819
6820 if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6821 !is_multicast_ether_addr(conf->bssid)) {
6822 /* If there is currently a HW scan going on in the background
6823 * then we need to cancel it else the RXON below will fail. */
6824 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6825 IWL_WARNING("Aborted scan still in progress "
6826 "after 100ms\n");
6827 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6828 mutex_unlock(&priv->mutex);
6829 return -EAGAIN;
6830 }
6831 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6832
6833 /* TODO: Audit driver for usage of these members and see
6834 * if mac80211 deprecates them (priv->bssid looks like it
6835 * shouldn't be there, but I haven't scanned the IBSS code
6836 * to verify) - jpk */
6837 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6838
6839 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6840 iwl4965_config_ap(priv);
6841 else {
6842 rc = iwl4965_commit_rxon(priv);
6843 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6844 iwl4965_rxon_add_station(
6845 priv, priv->active_rxon.bssid_addr, 1);
6846 }
6847
6848 } else {
6849 iwl4965_scan_cancel_timeout(priv, 100);
6850 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6851 iwl4965_commit_rxon(priv);
6852 }
6853
6854 done:
6855 spin_lock_irqsave(&priv->lock, flags);
6856 if (!conf->ssid_len)
6857 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6858 else
6859 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6860
6861 priv->essid_len = conf->ssid_len;
6862 spin_unlock_irqrestore(&priv->lock, flags);
6863
6864 IWL_DEBUG_MAC80211("leave\n");
6865 mutex_unlock(&priv->mutex);
6866
6867 return 0;
6868 }
6869
6870 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6871 unsigned int changed_flags,
6872 unsigned int *total_flags,
6873 int mc_count, struct dev_addr_list *mc_list)
6874 {
6875 /*
6876 * XXX: dummy
6877 * see also iwl4965_connection_init_rx_config
6878 */
6879 *total_flags = 0;
6880 }
6881
6882 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6883 struct ieee80211_if_init_conf *conf)
6884 {
6885 struct iwl_priv *priv = hw->priv;
6886
6887 IWL_DEBUG_MAC80211("enter\n");
6888
6889 mutex_lock(&priv->mutex);
6890
6891 if (iwl4965_is_ready_rf(priv)) {
6892 iwl4965_scan_cancel_timeout(priv, 100);
6893 cancel_delayed_work(&priv->post_associate);
6894 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6895 iwl4965_commit_rxon(priv);
6896 }
6897 if (priv->vif == conf->vif) {
6898 priv->vif = NULL;
6899 memset(priv->bssid, 0, ETH_ALEN);
6900 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6901 priv->essid_len = 0;
6902 }
6903 mutex_unlock(&priv->mutex);
6904
6905 IWL_DEBUG_MAC80211("leave\n");
6906
6907 }
6908
6909 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6910 struct ieee80211_vif *vif,
6911 struct ieee80211_bss_conf *bss_conf,
6912 u32 changes)
6913 {
6914 struct iwl_priv *priv = hw->priv;
6915
6916 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6917 if (bss_conf->use_short_preamble)
6918 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6919 else
6920 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6921 }
6922
6923 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6924 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6925 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6926 else
6927 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6928 }
6929
6930 if (changes & BSS_CHANGED_ASSOC) {
6931 /*
6932 * TODO:
6933 * do stuff instead of sniffing assoc resp
6934 */
6935 }
6936
6937 if (iwl4965_is_associated(priv))
6938 iwl4965_send_rxon_assoc(priv);
6939 }
6940
6941 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6942 {
6943 int rc = 0;
6944 unsigned long flags;
6945 struct iwl_priv *priv = hw->priv;
6946
6947 IWL_DEBUG_MAC80211("enter\n");
6948
6949 mutex_lock(&priv->mutex);
6950 spin_lock_irqsave(&priv->lock, flags);
6951
6952 if (!iwl4965_is_ready_rf(priv)) {
6953 rc = -EIO;
6954 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6955 goto out_unlock;
6956 }
6957
6958 if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { /* APs don't scan */
6959 rc = -EIO;
6960 IWL_ERROR("ERROR: APs don't scan\n");
6961 goto out_unlock;
6962 }
6963
6964 /* we don't schedule scan within next_scan_jiffies period */
6965 if (priv->next_scan_jiffies &&
6966 time_after(priv->next_scan_jiffies, jiffies)) {
6967 rc = -EAGAIN;
6968 goto out_unlock;
6969 }
6970 /* if we just finished scan ask for delay */
6971 if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6972 IWL_DELAY_NEXT_SCAN, jiffies)) {
6973 rc = -EAGAIN;
6974 goto out_unlock;
6975 }
6976 if (len) {
6977 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6978 iwl4965_escape_essid(ssid, len), (int)len);
6979
6980 priv->one_direct_scan = 1;
6981 priv->direct_ssid_len = (u8)
6982 min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6983 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6984 } else
6985 priv->one_direct_scan = 0;
6986
6987 rc = iwl4965_scan_initiate(priv);
6988
6989 IWL_DEBUG_MAC80211("leave\n");
6990
6991 out_unlock:
6992 spin_unlock_irqrestore(&priv->lock, flags);
6993 mutex_unlock(&priv->mutex);
6994
6995 return rc;
6996 }
6997
6998 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6999 struct ieee80211_key_conf *keyconf, const u8 *addr,
7000 u32 iv32, u16 *phase1key)
7001 {
7002 struct iwl_priv *priv = hw->priv;
7003 u8 sta_id = IWL_INVALID_STATION;
7004 unsigned long flags;
7005 __le16 key_flags = 0;
7006 int i;
7007 DECLARE_MAC_BUF(mac);
7008
7009 IWL_DEBUG_MAC80211("enter\n");
7010
7011 sta_id = iwl4965_hw_find_station(priv, addr);
7012 if (sta_id == IWL_INVALID_STATION) {
7013 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7014 print_mac(mac, addr));
7015 return;
7016 }
7017
7018 iwl4965_scan_cancel_timeout(priv, 100);
7019
7020 key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
7021 key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
7022 key_flags &= ~STA_KEY_FLG_INVALID;
7023
7024 if (sta_id == priv->hw_setting.bcast_sta_id)
7025 key_flags |= STA_KEY_MULTICAST_MSK;
7026
7027 spin_lock_irqsave(&priv->sta_lock, flags);
7028
7029 priv->stations[sta_id].sta.key.key_offset =
7030 (sta_id % STA_KEY_MAX_NUM);/* FIXME */
7031 priv->stations[sta_id].sta.key.key_flags = key_flags;
7032 priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
7033
7034 for (i = 0; i < 5; i++)
7035 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
7036 cpu_to_le16(phase1key[i]);
7037
7038 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
7039 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
7040
7041 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
7042
7043 spin_unlock_irqrestore(&priv->sta_lock, flags);
7044
7045 IWL_DEBUG_MAC80211("leave\n");
7046 }
7047
7048 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7049 const u8 *local_addr, const u8 *addr,
7050 struct ieee80211_key_conf *key)
7051 {
7052 struct iwl_priv *priv = hw->priv;
7053 DECLARE_MAC_BUF(mac);
7054 int ret = 0;
7055 u8 sta_id = IWL_INVALID_STATION;
7056 u8 static_key;
7057
7058 IWL_DEBUG_MAC80211("enter\n");
7059
7060 if (!priv->cfg->mod_params->hw_crypto) {
7061 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7062 return -EOPNOTSUPP;
7063 }
7064
7065 if (is_zero_ether_addr(addr))
7066 /* only support pairwise keys */
7067 return -EOPNOTSUPP;
7068
7069 /* FIXME: need to differenciate between static and dynamic key
7070 * in the level of mac80211 */
7071 static_key = !iwl4965_is_associated(priv);
7072
7073 if (!static_key) {
7074 sta_id = iwl4965_hw_find_station(priv, addr);
7075 if (sta_id == IWL_INVALID_STATION) {
7076 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7077 print_mac(mac, addr));
7078 return -EINVAL;
7079 }
7080 }
7081
7082 iwl4965_scan_cancel_timeout(priv, 100);
7083
7084 switch (cmd) {
7085 case SET_KEY:
7086 if (static_key)
7087 ret = iwl4965_set_static_key(priv, key);
7088 else
7089 ret = iwl4965_set_dynamic_key(priv, key, sta_id);
7090
7091 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
7092 break;
7093 case DISABLE_KEY:
7094 if (static_key)
7095 ret = iwl4965_remove_static_key(priv);
7096 else
7097 ret = iwl4965_clear_sta_key_info(priv, sta_id);
7098
7099 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7100 break;
7101 default:
7102 ret = -EINVAL;
7103 }
7104
7105 IWL_DEBUG_MAC80211("leave\n");
7106
7107 return ret;
7108 }
7109
7110 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7111 const struct ieee80211_tx_queue_params *params)
7112 {
7113 struct iwl_priv *priv = hw->priv;
7114 unsigned long flags;
7115 int q;
7116
7117 IWL_DEBUG_MAC80211("enter\n");
7118
7119 if (!iwl4965_is_ready_rf(priv)) {
7120 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7121 return -EIO;
7122 }
7123
7124 if (queue >= AC_NUM) {
7125 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7126 return 0;
7127 }
7128
7129 if (!priv->qos_data.qos_enable) {
7130 priv->qos_data.qos_active = 0;
7131 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7132 return 0;
7133 }
7134 q = AC_NUM - 1 - queue;
7135
7136 spin_lock_irqsave(&priv->lock, flags);
7137
7138 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7139 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7140 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7141 priv->qos_data.def_qos_parm.ac[q].edca_txop =
7142 cpu_to_le16((params->txop * 32));
7143
7144 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7145 priv->qos_data.qos_active = 1;
7146
7147 spin_unlock_irqrestore(&priv->lock, flags);
7148
7149 mutex_lock(&priv->mutex);
7150 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7151 iwl4965_activate_qos(priv, 1);
7152 else if (priv->assoc_id && iwl4965_is_associated(priv))
7153 iwl4965_activate_qos(priv, 0);
7154
7155 mutex_unlock(&priv->mutex);
7156
7157 IWL_DEBUG_MAC80211("leave\n");
7158 return 0;
7159 }
7160
7161 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7162 struct ieee80211_tx_queue_stats *stats)
7163 {
7164 struct iwl_priv *priv = hw->priv;
7165 int i, avail;
7166 struct iwl4965_tx_queue *txq;
7167 struct iwl4965_queue *q;
7168 unsigned long flags;
7169
7170 IWL_DEBUG_MAC80211("enter\n");
7171
7172 if (!iwl4965_is_ready_rf(priv)) {
7173 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7174 return -EIO;
7175 }
7176
7177 spin_lock_irqsave(&priv->lock, flags);
7178
7179 for (i = 0; i < AC_NUM; i++) {
7180 txq = &priv->txq[i];
7181 q = &txq->q;
7182 avail = iwl4965_queue_space(q);
7183
7184 stats->data[i].len = q->n_window - avail;
7185 stats->data[i].limit = q->n_window - q->high_mark;
7186 stats->data[i].count = q->n_window;
7187
7188 }
7189 spin_unlock_irqrestore(&priv->lock, flags);
7190
7191 IWL_DEBUG_MAC80211("leave\n");
7192
7193 return 0;
7194 }
7195
7196 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7197 struct ieee80211_low_level_stats *stats)
7198 {
7199 IWL_DEBUG_MAC80211("enter\n");
7200 IWL_DEBUG_MAC80211("leave\n");
7201
7202 return 0;
7203 }
7204
7205 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7206 {
7207 IWL_DEBUG_MAC80211("enter\n");
7208 IWL_DEBUG_MAC80211("leave\n");
7209
7210 return 0;
7211 }
7212
7213 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7214 {
7215 struct iwl_priv *priv = hw->priv;
7216 unsigned long flags;
7217
7218 mutex_lock(&priv->mutex);
7219 IWL_DEBUG_MAC80211("enter\n");
7220
7221 priv->lq_mngr.lq_ready = 0;
7222 #ifdef CONFIG_IWL4965_HT
7223 spin_lock_irqsave(&priv->lock, flags);
7224 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7225 spin_unlock_irqrestore(&priv->lock, flags);
7226 #endif /* CONFIG_IWL4965_HT */
7227
7228 iwlcore_reset_qos(priv);
7229
7230 cancel_delayed_work(&priv->post_associate);
7231
7232 spin_lock_irqsave(&priv->lock, flags);
7233 priv->assoc_id = 0;
7234 priv->assoc_capability = 0;
7235 priv->call_post_assoc_from_beacon = 0;
7236 priv->assoc_station_added = 0;
7237
7238 /* new association get rid of ibss beacon skb */
7239 if (priv->ibss_beacon)
7240 dev_kfree_skb(priv->ibss_beacon);
7241
7242 priv->ibss_beacon = NULL;
7243
7244 priv->beacon_int = priv->hw->conf.beacon_int;
7245 priv->timestamp1 = 0;
7246 priv->timestamp0 = 0;
7247 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7248 priv->beacon_int = 0;
7249
7250 spin_unlock_irqrestore(&priv->lock, flags);
7251
7252 if (!iwl4965_is_ready_rf(priv)) {
7253 IWL_DEBUG_MAC80211("leave - not ready\n");
7254 mutex_unlock(&priv->mutex);
7255 return;
7256 }
7257
7258 /* we are restarting association process
7259 * clear RXON_FILTER_ASSOC_MSK bit
7260 */
7261 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7262 iwl4965_scan_cancel_timeout(priv, 100);
7263 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7264 iwl4965_commit_rxon(priv);
7265 }
7266
7267 /* Per mac80211.h: This is only used in IBSS mode... */
7268 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7269
7270 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7271 mutex_unlock(&priv->mutex);
7272 return;
7273 }
7274
7275 priv->only_active_channel = 0;
7276
7277 iwl4965_set_rate(priv);
7278
7279 mutex_unlock(&priv->mutex);
7280
7281 IWL_DEBUG_MAC80211("leave\n");
7282 }
7283
7284 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7285 struct ieee80211_tx_control *control)
7286 {
7287 struct iwl_priv *priv = hw->priv;
7288 unsigned long flags;
7289
7290 mutex_lock(&priv->mutex);
7291 IWL_DEBUG_MAC80211("enter\n");
7292
7293 if (!iwl4965_is_ready_rf(priv)) {
7294 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7295 mutex_unlock(&priv->mutex);
7296 return -EIO;
7297 }
7298
7299 if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7300 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7301 mutex_unlock(&priv->mutex);
7302 return -EIO;
7303 }
7304
7305 spin_lock_irqsave(&priv->lock, flags);
7306
7307 if (priv->ibss_beacon)
7308 dev_kfree_skb(priv->ibss_beacon);
7309
7310 priv->ibss_beacon = skb;
7311
7312 priv->assoc_id = 0;
7313
7314 IWL_DEBUG_MAC80211("leave\n");
7315 spin_unlock_irqrestore(&priv->lock, flags);
7316
7317 iwlcore_reset_qos(priv);
7318
7319 queue_work(priv->workqueue, &priv->post_associate.work);
7320
7321 mutex_unlock(&priv->mutex);
7322
7323 return 0;
7324 }
7325
7326 #ifdef CONFIG_IWL4965_HT
7327
7328 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
7329 struct iwl_priv *priv)
7330 {
7331 struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
7332 struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
7333 struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
7334
7335 IWL_DEBUG_MAC80211("enter: \n");
7336
7337 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
7338 iwl_conf->is_ht = 0;
7339 return;
7340 }
7341
7342 iwl_conf->is_ht = 1;
7343 priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7344
7345 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
7346 iwl_conf->sgf |= 0x1;
7347 if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
7348 iwl_conf->sgf |= 0x2;
7349
7350 iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
7351 iwl_conf->max_amsdu_size =
7352 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
7353
7354 iwl_conf->supported_chan_width =
7355 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
7356 iwl_conf->extension_chan_offset =
7357 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
7358 /* If no above or below channel supplied disable FAT channel */
7359 if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
7360 iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
7361 iwl_conf->supported_chan_width = 0;
7362
7363 iwl_conf->tx_mimo_ps_mode =
7364 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7365 memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
7366
7367 iwl_conf->control_channel = ht_bss_conf->primary_channel;
7368 iwl_conf->tx_chan_width =
7369 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
7370 iwl_conf->ht_protection =
7371 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
7372 iwl_conf->non_GF_STA_present =
7373 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
7374
7375 IWL_DEBUG_MAC80211("control channel %d\n",
7376 iwl_conf->control_channel);
7377 IWL_DEBUG_MAC80211("leave\n");
7378 }
7379
7380 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
7381 struct ieee80211_conf *conf)
7382 {
7383 struct iwl_priv *priv = hw->priv;
7384
7385 IWL_DEBUG_MAC80211("enter: \n");
7386
7387 iwl4965_ht_info_fill(conf, priv);
7388 iwl4965_set_rxon_chain(priv);
7389
7390 if (priv && priv->assoc_id &&
7391 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
7392 unsigned long flags;
7393
7394 spin_lock_irqsave(&priv->lock, flags);
7395 if (priv->beacon_int)
7396 queue_work(priv->workqueue, &priv->post_associate.work);
7397 else
7398 priv->call_post_assoc_from_beacon = 1;
7399 spin_unlock_irqrestore(&priv->lock, flags);
7400 }
7401
7402 IWL_DEBUG_MAC80211("leave:\n");
7403 return 0;
7404 }
7405
7406 #endif /*CONFIG_IWL4965_HT*/
7407
7408 /*****************************************************************************
7409 *
7410 * sysfs attributes
7411 *
7412 *****************************************************************************/
7413
7414 #ifdef CONFIG_IWLWIFI_DEBUG
7415
7416 /*
7417 * The following adds a new attribute to the sysfs representation
7418 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7419 * used for controlling the debug level.
7420 *
7421 * See the level definitions in iwl for details.
7422 */
7423
7424 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7425 {
7426 return sprintf(buf, "0x%08X\n", iwl_debug_level);
7427 }
7428 static ssize_t store_debug_level(struct device_driver *d,
7429 const char *buf, size_t count)
7430 {
7431 char *p = (char *)buf;
7432 u32 val;
7433
7434 val = simple_strtoul(p, &p, 0);
7435 if (p == buf)
7436 printk(KERN_INFO DRV_NAME
7437 ": %s is not in hex or decimal form.\n", buf);
7438 else
7439 iwl_debug_level = val;
7440
7441 return strnlen(buf, count);
7442 }
7443
7444 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7445 show_debug_level, store_debug_level);
7446
7447 #endif /* CONFIG_IWLWIFI_DEBUG */
7448
7449 static ssize_t show_rf_kill(struct device *d,
7450 struct device_attribute *attr, char *buf)
7451 {
7452 /*
7453 * 0 - RF kill not enabled
7454 * 1 - SW based RF kill active (sysfs)
7455 * 2 - HW based RF kill active
7456 * 3 - Both HW and SW based RF kill active
7457 */
7458 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7459 int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7460 (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7461
7462 return sprintf(buf, "%i\n", val);
7463 }
7464
7465 static ssize_t store_rf_kill(struct device *d,
7466 struct device_attribute *attr,
7467 const char *buf, size_t count)
7468 {
7469 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7470
7471 mutex_lock(&priv->mutex);
7472 iwl4965_radio_kill_sw(priv, buf[0] == '1');
7473 mutex_unlock(&priv->mutex);
7474
7475 return count;
7476 }
7477
7478 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7479
7480 static ssize_t show_temperature(struct device *d,
7481 struct device_attribute *attr, char *buf)
7482 {
7483 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7484
7485 if (!iwl4965_is_alive(priv))
7486 return -EAGAIN;
7487
7488 return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7489 }
7490
7491 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7492
7493 static ssize_t show_rs_window(struct device *d,
7494 struct device_attribute *attr,
7495 char *buf)
7496 {
7497 struct iwl_priv *priv = d->driver_data;
7498 return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7499 }
7500 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7501
7502 static ssize_t show_tx_power(struct device *d,
7503 struct device_attribute *attr, char *buf)
7504 {
7505 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7506 return sprintf(buf, "%d\n", priv->user_txpower_limit);
7507 }
7508
7509 static ssize_t store_tx_power(struct device *d,
7510 struct device_attribute *attr,
7511 const char *buf, size_t count)
7512 {
7513 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7514 char *p = (char *)buf;
7515 u32 val;
7516
7517 val = simple_strtoul(p, &p, 10);
7518 if (p == buf)
7519 printk(KERN_INFO DRV_NAME
7520 ": %s is not in decimal form.\n", buf);
7521 else
7522 iwl4965_hw_reg_set_txpower(priv, val);
7523
7524 return count;
7525 }
7526
7527 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7528
7529 static ssize_t show_flags(struct device *d,
7530 struct device_attribute *attr, char *buf)
7531 {
7532 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7533
7534 return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7535 }
7536
7537 static ssize_t store_flags(struct device *d,
7538 struct device_attribute *attr,
7539 const char *buf, size_t count)
7540 {
7541 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7542 u32 flags = simple_strtoul(buf, NULL, 0);
7543
7544 mutex_lock(&priv->mutex);
7545 if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7546 /* Cancel any currently running scans... */
7547 if (iwl4965_scan_cancel_timeout(priv, 100))
7548 IWL_WARNING("Could not cancel scan.\n");
7549 else {
7550 IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7551 flags);
7552 priv->staging_rxon.flags = cpu_to_le32(flags);
7553 iwl4965_commit_rxon(priv);
7554 }
7555 }
7556 mutex_unlock(&priv->mutex);
7557
7558 return count;
7559 }
7560
7561 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7562
7563 static ssize_t show_filter_flags(struct device *d,
7564 struct device_attribute *attr, char *buf)
7565 {
7566 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7567
7568 return sprintf(buf, "0x%04X\n",
7569 le32_to_cpu(priv->active_rxon.filter_flags));
7570 }
7571
7572 static ssize_t store_filter_flags(struct device *d,
7573 struct device_attribute *attr,
7574 const char *buf, size_t count)
7575 {
7576 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7577 u32 filter_flags = simple_strtoul(buf, NULL, 0);
7578
7579 mutex_lock(&priv->mutex);
7580 if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7581 /* Cancel any currently running scans... */
7582 if (iwl4965_scan_cancel_timeout(priv, 100))
7583 IWL_WARNING("Could not cancel scan.\n");
7584 else {
7585 IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7586 "0x%04X\n", filter_flags);
7587 priv->staging_rxon.filter_flags =
7588 cpu_to_le32(filter_flags);
7589 iwl4965_commit_rxon(priv);
7590 }
7591 }
7592 mutex_unlock(&priv->mutex);
7593
7594 return count;
7595 }
7596
7597 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7598 store_filter_flags);
7599
7600 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7601
7602 static ssize_t show_measurement(struct device *d,
7603 struct device_attribute *attr, char *buf)
7604 {
7605 struct iwl_priv *priv = dev_get_drvdata(d);
7606 struct iwl4965_spectrum_notification measure_report;
7607 u32 size = sizeof(measure_report), len = 0, ofs = 0;
7608 u8 *data = (u8 *) & measure_report;
7609 unsigned long flags;
7610
7611 spin_lock_irqsave(&priv->lock, flags);
7612 if (!(priv->measurement_status & MEASUREMENT_READY)) {
7613 spin_unlock_irqrestore(&priv->lock, flags);
7614 return 0;
7615 }
7616 memcpy(&measure_report, &priv->measure_report, size);
7617 priv->measurement_status = 0;
7618 spin_unlock_irqrestore(&priv->lock, flags);
7619
7620 while (size && (PAGE_SIZE - len)) {
7621 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7622 PAGE_SIZE - len, 1);
7623 len = strlen(buf);
7624 if (PAGE_SIZE - len)
7625 buf[len++] = '\n';
7626
7627 ofs += 16;
7628 size -= min(size, 16U);
7629 }
7630
7631 return len;
7632 }
7633
7634 static ssize_t store_measurement(struct device *d,
7635 struct device_attribute *attr,
7636 const char *buf, size_t count)
7637 {
7638 struct iwl_priv *priv = dev_get_drvdata(d);
7639 struct ieee80211_measurement_params params = {
7640 .channel = le16_to_cpu(priv->active_rxon.channel),
7641 .start_time = cpu_to_le64(priv->last_tsf),
7642 .duration = cpu_to_le16(1),
7643 };
7644 u8 type = IWL_MEASURE_BASIC;
7645 u8 buffer[32];
7646 u8 channel;
7647
7648 if (count) {
7649 char *p = buffer;
7650 strncpy(buffer, buf, min(sizeof(buffer), count));
7651 channel = simple_strtoul(p, NULL, 0);
7652 if (channel)
7653 params.channel = channel;
7654
7655 p = buffer;
7656 while (*p && *p != ' ')
7657 p++;
7658 if (*p)
7659 type = simple_strtoul(p + 1, NULL, 0);
7660 }
7661
7662 IWL_DEBUG_INFO("Invoking measurement of type %d on "
7663 "channel %d (for '%s')\n", type, params.channel, buf);
7664 iwl4965_get_measurement(priv, &params, type);
7665
7666 return count;
7667 }
7668
7669 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7670 show_measurement, store_measurement);
7671 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7672
7673 static ssize_t store_retry_rate(struct device *d,
7674 struct device_attribute *attr,
7675 const char *buf, size_t count)
7676 {
7677 struct iwl_priv *priv = dev_get_drvdata(d);
7678
7679 priv->retry_rate = simple_strtoul(buf, NULL, 0);
7680 if (priv->retry_rate <= 0)
7681 priv->retry_rate = 1;
7682
7683 return count;
7684 }
7685
7686 static ssize_t show_retry_rate(struct device *d,
7687 struct device_attribute *attr, char *buf)
7688 {
7689 struct iwl_priv *priv = dev_get_drvdata(d);
7690 return sprintf(buf, "%d", priv->retry_rate);
7691 }
7692
7693 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7694 store_retry_rate);
7695
7696 static ssize_t store_power_level(struct device *d,
7697 struct device_attribute *attr,
7698 const char *buf, size_t count)
7699 {
7700 struct iwl_priv *priv = dev_get_drvdata(d);
7701 int rc;
7702 int mode;
7703
7704 mode = simple_strtoul(buf, NULL, 0);
7705 mutex_lock(&priv->mutex);
7706
7707 if (!iwl4965_is_ready(priv)) {
7708 rc = -EAGAIN;
7709 goto out;
7710 }
7711
7712 if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7713 mode = IWL_POWER_AC;
7714 else
7715 mode |= IWL_POWER_ENABLED;
7716
7717 if (mode != priv->power_mode) {
7718 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7719 if (rc) {
7720 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7721 goto out;
7722 }
7723 priv->power_mode = mode;
7724 }
7725
7726 rc = count;
7727
7728 out:
7729 mutex_unlock(&priv->mutex);
7730 return rc;
7731 }
7732
7733 #define MAX_WX_STRING 80
7734
7735 /* Values are in microsecond */
7736 static const s32 timeout_duration[] = {
7737 350000,
7738 250000,
7739 75000,
7740 37000,
7741 25000,
7742 };
7743 static const s32 period_duration[] = {
7744 400000,
7745 700000,
7746 1000000,
7747 1000000,
7748 1000000
7749 };
7750
7751 static ssize_t show_power_level(struct device *d,
7752 struct device_attribute *attr, char *buf)
7753 {
7754 struct iwl_priv *priv = dev_get_drvdata(d);
7755 int level = IWL_POWER_LEVEL(priv->power_mode);
7756 char *p = buf;
7757
7758 p += sprintf(p, "%d ", level);
7759 switch (level) {
7760 case IWL_POWER_MODE_CAM:
7761 case IWL_POWER_AC:
7762 p += sprintf(p, "(AC)");
7763 break;
7764 case IWL_POWER_BATTERY:
7765 p += sprintf(p, "(BATTERY)");
7766 break;
7767 default:
7768 p += sprintf(p,
7769 "(Timeout %dms, Period %dms)",
7770 timeout_duration[level - 1] / 1000,
7771 period_duration[level - 1] / 1000);
7772 }
7773
7774 if (!(priv->power_mode & IWL_POWER_ENABLED))
7775 p += sprintf(p, " OFF\n");
7776 else
7777 p += sprintf(p, " \n");
7778
7779 return (p - buf + 1);
7780
7781 }
7782
7783 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7784 store_power_level);
7785
7786 static ssize_t show_channels(struct device *d,
7787 struct device_attribute *attr, char *buf)
7788 {
7789 /* all this shit doesn't belong into sysfs anyway */
7790 return 0;
7791 }
7792
7793 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7794
7795 static ssize_t show_statistics(struct device *d,
7796 struct device_attribute *attr, char *buf)
7797 {
7798 struct iwl_priv *priv = dev_get_drvdata(d);
7799 u32 size = sizeof(struct iwl4965_notif_statistics);
7800 u32 len = 0, ofs = 0;
7801 u8 *data = (u8 *) & priv->statistics;
7802 int rc = 0;
7803
7804 if (!iwl4965_is_alive(priv))
7805 return -EAGAIN;
7806
7807 mutex_lock(&priv->mutex);
7808 rc = iwl4965_send_statistics_request(priv);
7809 mutex_unlock(&priv->mutex);
7810
7811 if (rc) {
7812 len = sprintf(buf,
7813 "Error sending statistics request: 0x%08X\n", rc);
7814 return len;
7815 }
7816
7817 while (size && (PAGE_SIZE - len)) {
7818 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7819 PAGE_SIZE - len, 1);
7820 len = strlen(buf);
7821 if (PAGE_SIZE - len)
7822 buf[len++] = '\n';
7823
7824 ofs += 16;
7825 size -= min(size, 16U);
7826 }
7827
7828 return len;
7829 }
7830
7831 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7832
7833 static ssize_t show_antenna(struct device *d,
7834 struct device_attribute *attr, char *buf)
7835 {
7836 struct iwl_priv *priv = dev_get_drvdata(d);
7837
7838 if (!iwl4965_is_alive(priv))
7839 return -EAGAIN;
7840
7841 return sprintf(buf, "%d\n", priv->antenna);
7842 }
7843
7844 static ssize_t store_antenna(struct device *d,
7845 struct device_attribute *attr,
7846 const char *buf, size_t count)
7847 {
7848 int ant;
7849 struct iwl_priv *priv = dev_get_drvdata(d);
7850
7851 if (count == 0)
7852 return 0;
7853
7854 if (sscanf(buf, "%1i", &ant) != 1) {
7855 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7856 return count;
7857 }
7858
7859 if ((ant >= 0) && (ant <= 2)) {
7860 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7861 priv->antenna = (enum iwl4965_antenna)ant;
7862 } else
7863 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7864
7865
7866 return count;
7867 }
7868
7869 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7870
7871 static ssize_t show_status(struct device *d,
7872 struct device_attribute *attr, char *buf)
7873 {
7874 struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7875 if (!iwl4965_is_alive(priv))
7876 return -EAGAIN;
7877 return sprintf(buf, "0x%08x\n", (int)priv->status);
7878 }
7879
7880 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7881
7882 static ssize_t dump_error_log(struct device *d,
7883 struct device_attribute *attr,
7884 const char *buf, size_t count)
7885 {
7886 char *p = (char *)buf;
7887
7888 if (p[0] == '1')
7889 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7890
7891 return strnlen(buf, count);
7892 }
7893
7894 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7895
7896 static ssize_t dump_event_log(struct device *d,
7897 struct device_attribute *attr,
7898 const char *buf, size_t count)
7899 {
7900 char *p = (char *)buf;
7901
7902 if (p[0] == '1')
7903 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7904
7905 return strnlen(buf, count);
7906 }
7907
7908 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7909
7910 /*****************************************************************************
7911 *
7912 * driver setup and teardown
7913 *
7914 *****************************************************************************/
7915
7916 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7917 {
7918 priv->workqueue = create_workqueue(DRV_NAME);
7919
7920 init_waitqueue_head(&priv->wait_command_queue);
7921
7922 INIT_WORK(&priv->up, iwl4965_bg_up);
7923 INIT_WORK(&priv->restart, iwl4965_bg_restart);
7924 INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7925 INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7926 INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7927 INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7928 INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7929 INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7930 INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7931 INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7932 INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7933 INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7934
7935 iwl4965_hw_setup_deferred_work(priv);
7936
7937 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7938 iwl4965_irq_tasklet, (unsigned long)priv);
7939 }
7940
7941 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7942 {
7943 iwl4965_hw_cancel_deferred_work(priv);
7944
7945 cancel_delayed_work_sync(&priv->init_alive_start);
7946 cancel_delayed_work(&priv->scan_check);
7947 cancel_delayed_work(&priv->alive_start);
7948 cancel_delayed_work(&priv->post_associate);
7949 cancel_work_sync(&priv->beacon_update);
7950 }
7951
7952 static struct attribute *iwl4965_sysfs_entries[] = {
7953 &dev_attr_antenna.attr,
7954 &dev_attr_channels.attr,
7955 &dev_attr_dump_errors.attr,
7956 &dev_attr_dump_events.attr,
7957 &dev_attr_flags.attr,
7958 &dev_attr_filter_flags.attr,
7959 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7960 &dev_attr_measurement.attr,
7961 #endif
7962 &dev_attr_power_level.attr,
7963 &dev_attr_retry_rate.attr,
7964 &dev_attr_rf_kill.attr,
7965 &dev_attr_rs_window.attr,
7966 &dev_attr_statistics.attr,
7967 &dev_attr_status.attr,
7968 &dev_attr_temperature.attr,
7969 &dev_attr_tx_power.attr,
7970
7971 NULL
7972 };
7973
7974 static struct attribute_group iwl4965_attribute_group = {
7975 .name = NULL, /* put in device directory */
7976 .attrs = iwl4965_sysfs_entries,
7977 };
7978
7979 static struct ieee80211_ops iwl4965_hw_ops = {
7980 .tx = iwl4965_mac_tx,
7981 .start = iwl4965_mac_start,
7982 .stop = iwl4965_mac_stop,
7983 .add_interface = iwl4965_mac_add_interface,
7984 .remove_interface = iwl4965_mac_remove_interface,
7985 .config = iwl4965_mac_config,
7986 .config_interface = iwl4965_mac_config_interface,
7987 .configure_filter = iwl4965_configure_filter,
7988 .set_key = iwl4965_mac_set_key,
7989 .update_tkip_key = iwl4965_mac_update_tkip_key,
7990 .get_stats = iwl4965_mac_get_stats,
7991 .get_tx_stats = iwl4965_mac_get_tx_stats,
7992 .conf_tx = iwl4965_mac_conf_tx,
7993 .get_tsf = iwl4965_mac_get_tsf,
7994 .reset_tsf = iwl4965_mac_reset_tsf,
7995 .beacon_update = iwl4965_mac_beacon_update,
7996 .bss_info_changed = iwl4965_bss_info_changed,
7997 #ifdef CONFIG_IWL4965_HT
7998 .conf_ht = iwl4965_mac_conf_ht,
7999 .ampdu_action = iwl4965_mac_ampdu_action,
8000 #endif /* CONFIG_IWL4965_HT */
8001 .hw_scan = iwl4965_mac_hw_scan
8002 };
8003
8004 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8005 {
8006 int err = 0;
8007 struct iwl_priv *priv;
8008 struct ieee80211_hw *hw;
8009 struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
8010 DECLARE_MAC_BUF(mac);
8011
8012 /************************
8013 * 1. Allocating HW data
8014 ************************/
8015
8016 /* Disabling hardware scan means that mac80211 will perform scans
8017 * "the hard way", rather than using device's scan. */
8018 if (cfg->mod_params->disable_hw_scan) {
8019 IWL_DEBUG_INFO("Disabling hw_scan\n");
8020 iwl4965_hw_ops.hw_scan = NULL;
8021 }
8022
8023 hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
8024 if (!hw) {
8025 err = -ENOMEM;
8026 goto out;
8027 }
8028 priv = hw->priv;
8029 /* At this point both hw and priv are allocated. */
8030
8031 SET_IEEE80211_DEV(hw, &pdev->dev);
8032
8033 IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8034 priv->cfg = cfg;
8035 priv->pci_dev = pdev;
8036
8037 #ifdef CONFIG_IWLWIFI_DEBUG
8038 iwl_debug_level = priv->cfg->mod_params->debug;
8039 atomic_set(&priv->restrict_refcnt, 0);
8040 #endif
8041
8042 /**************************
8043 * 2. Initializing PCI bus
8044 **************************/
8045 if (pci_enable_device(pdev)) {
8046 err = -ENODEV;
8047 goto out_ieee80211_free_hw;
8048 }
8049
8050 pci_set_master(pdev);
8051
8052 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8053 if (!err)
8054 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8055 if (err) {
8056 printk(KERN_WARNING DRV_NAME
8057 ": No suitable DMA available.\n");
8058 goto out_pci_disable_device;
8059 }
8060
8061 err = pci_request_regions(pdev, DRV_NAME);
8062 if (err)
8063 goto out_pci_disable_device;
8064
8065 pci_set_drvdata(pdev, priv);
8066
8067 /* We disable the RETRY_TIMEOUT register (0x41) to keep
8068 * PCI Tx retries from interfering with C3 CPU state */
8069 pci_write_config_byte(pdev, 0x41, 0x00);
8070
8071 /***********************
8072 * 3. Read REV register
8073 ***********************/
8074 priv->hw_base = pci_iomap(pdev, 0, 0);
8075 if (!priv->hw_base) {
8076 err = -ENODEV;
8077 goto out_pci_release_regions;
8078 }
8079
8080 IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8081 (unsigned long long) pci_resource_len(pdev, 0));
8082 IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8083
8084 printk(KERN_INFO DRV_NAME
8085 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8086
8087 /*****************
8088 * 4. Read EEPROM
8089 *****************/
8090 /* nic init */
8091 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8092 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8093
8094 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8095 err = iwl_poll_bit(priv, CSR_GP_CNTRL,
8096 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8097 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8098 if (err < 0) {
8099 IWL_DEBUG_INFO("Failed to init the card\n");
8100 goto out_iounmap;
8101 }
8102 /* Read the EEPROM */
8103 err = iwl_eeprom_init(priv);
8104 if (err) {
8105 IWL_ERROR("Unable to init EEPROM\n");
8106 goto out_iounmap;
8107 }
8108 /* MAC Address location in EEPROM same for 3945/4965 */
8109 iwl_eeprom_get_mac(priv, priv->mac_addr);
8110 IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8111 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8112
8113 /************************
8114 * 5. Setup HW constants
8115 ************************/
8116 /* Device-specific setup */
8117 if (iwl4965_hw_set_hw_setting(priv)) {
8118 IWL_ERROR("failed to set hw settings\n");
8119 goto out_iounmap;
8120 }
8121
8122 /*******************
8123 * 6. Setup hw/priv
8124 *******************/
8125
8126 err = iwl_setup(priv);
8127 if (err)
8128 goto out_unset_hw_settings;
8129 /* At this point both hw and priv are initialized. */
8130
8131 /**********************************
8132 * 7. Initialize module parameters
8133 **********************************/
8134
8135 /* Disable radio (SW RF KILL) via parameter when loading driver */
8136 if (priv->cfg->mod_params->disable) {
8137 set_bit(STATUS_RF_KILL_SW, &priv->status);
8138 IWL_DEBUG_INFO("Radio disabled.\n");
8139 }
8140
8141 if (priv->cfg->mod_params->enable_qos)
8142 priv->qos_data.qos_enable = 1;
8143
8144 /********************
8145 * 8. Setup services
8146 ********************/
8147 iwl4965_disable_interrupts(priv);
8148
8149 err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8150 if (err) {
8151 IWL_ERROR("failed to create sysfs device attributes\n");
8152 goto out_unset_hw_settings;
8153 }
8154
8155 err = iwl_dbgfs_register(priv, DRV_NAME);
8156 if (err) {
8157 IWL_ERROR("failed to create debugfs files\n");
8158 goto out_remove_sysfs;
8159 }
8160
8161 iwl4965_setup_deferred_work(priv);
8162 iwl4965_setup_rx_handlers(priv);
8163
8164 /********************
8165 * 9. Conclude
8166 ********************/
8167 pci_save_state(pdev);
8168 pci_disable_device(pdev);
8169
8170 return 0;
8171
8172 out_remove_sysfs:
8173 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8174 out_unset_hw_settings:
8175 iwl4965_unset_hw_setting(priv);
8176 out_iounmap:
8177 pci_iounmap(pdev, priv->hw_base);
8178 out_pci_release_regions:
8179 pci_release_regions(pdev);
8180 pci_set_drvdata(pdev, NULL);
8181 out_pci_disable_device:
8182 pci_disable_device(pdev);
8183 out_ieee80211_free_hw:
8184 ieee80211_free_hw(priv->hw);
8185 out:
8186 return err;
8187 }
8188
8189 static void iwl4965_pci_remove(struct pci_dev *pdev)
8190 {
8191 struct iwl_priv *priv = pci_get_drvdata(pdev);
8192 struct list_head *p, *q;
8193 int i;
8194
8195 if (!priv)
8196 return;
8197
8198 IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8199
8200 set_bit(STATUS_EXIT_PENDING, &priv->status);
8201
8202 iwl4965_down(priv);
8203
8204 /* Free MAC hash list for ADHOC */
8205 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8206 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8207 list_del(p);
8208 kfree(list_entry(p, struct iwl4965_ibss_seq, list));
8209 }
8210 }
8211
8212 iwl_dbgfs_unregister(priv);
8213 sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8214
8215 iwl4965_dealloc_ucode_pci(priv);
8216
8217 if (priv->rxq.bd)
8218 iwl4965_rx_queue_free(priv, &priv->rxq);
8219 iwl4965_hw_txq_ctx_free(priv);
8220
8221 iwl4965_unset_hw_setting(priv);
8222 iwlcore_clear_stations_table(priv);
8223
8224 if (priv->mac80211_registered) {
8225 ieee80211_unregister_hw(priv->hw);
8226 iwl4965_rate_control_unregister(priv->hw);
8227 }
8228
8229 /*netif_stop_queue(dev); */
8230 flush_workqueue(priv->workqueue);
8231
8232 /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
8233 * priv->workqueue... so we can't take down the workqueue
8234 * until now... */
8235 destroy_workqueue(priv->workqueue);
8236 priv->workqueue = NULL;
8237
8238 pci_iounmap(pdev, priv->hw_base);
8239 pci_release_regions(pdev);
8240 pci_disable_device(pdev);
8241 pci_set_drvdata(pdev, NULL);
8242
8243 iwl_free_channel_map(priv);
8244 iwl4965_free_geos(priv);
8245
8246 if (priv->ibss_beacon)
8247 dev_kfree_skb(priv->ibss_beacon);
8248
8249 ieee80211_free_hw(priv->hw);
8250 }
8251
8252 #ifdef CONFIG_PM
8253
8254 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8255 {
8256 struct iwl_priv *priv = pci_get_drvdata(pdev);
8257
8258 if (priv->is_open) {
8259 set_bit(STATUS_IN_SUSPEND, &priv->status);
8260 iwl4965_mac_stop(priv->hw);
8261 priv->is_open = 1;
8262 }
8263
8264 pci_set_power_state(pdev, PCI_D3hot);
8265
8266 return 0;
8267 }
8268
8269 static int iwl4965_pci_resume(struct pci_dev *pdev)
8270 {
8271 struct iwl_priv *priv = pci_get_drvdata(pdev);
8272
8273 pci_set_power_state(pdev, PCI_D0);
8274
8275 if (priv->is_open)
8276 iwl4965_mac_start(priv->hw);
8277
8278 clear_bit(STATUS_IN_SUSPEND, &priv->status);
8279 return 0;
8280 }
8281
8282 #endif /* CONFIG_PM */
8283
8284 /*****************************************************************************
8285 *
8286 * driver and module entry point
8287 *
8288 *****************************************************************************/
8289
8290 static struct pci_driver iwl4965_driver = {
8291 .name = DRV_NAME,
8292 .id_table = iwl4965_hw_card_ids,
8293 .probe = iwl4965_pci_probe,
8294 .remove = __devexit_p(iwl4965_pci_remove),
8295 #ifdef CONFIG_PM
8296 .suspend = iwl4965_pci_suspend,
8297 .resume = iwl4965_pci_resume,
8298 #endif
8299 };
8300
8301 static int __init iwl4965_init(void)
8302 {
8303
8304 int ret;
8305 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8306 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8307 ret = pci_register_driver(&iwl4965_driver);
8308 if (ret) {
8309 IWL_ERROR("Unable to initialize PCI module\n");
8310 return ret;
8311 }
8312 #ifdef CONFIG_IWLWIFI_DEBUG
8313 ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8314 if (ret) {
8315 IWL_ERROR("Unable to create driver sysfs file\n");
8316 pci_unregister_driver(&iwl4965_driver);
8317 return ret;
8318 }
8319 #endif
8320
8321 return ret;
8322 }
8323
8324 static void __exit iwl4965_exit(void)
8325 {
8326 #ifdef CONFIG_IWLWIFI_DEBUG
8327 driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8328 #endif
8329 pci_unregister_driver(&iwl4965_driver);
8330 }
8331
8332 module_exit(iwl4965_exit);
8333 module_init(iwl4965_init);
Linux kernel - Deliverables
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