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iwlagn: do not use interruptible waits
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-rx.c
blob2ee61031e207b8357e63f40eea6ce2a95f0eb4b4
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 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 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/etherdevice.h>
31 #include <linux/slab.h>
32 #include <linux/sched.h>
33 #include <net/mac80211.h>
34 #include <asm/unaligned.h>
35 #include "iwl-eeprom.h"
36 #include "iwl-dev.h"
37 #include "iwl-core.h"
38 #include "iwl-sta.h"
39 #include "iwl-io.h"
40 #include "iwl-helpers.h"
41 #include "iwl-agn-calib.h"
42 #include "iwl-agn.h"
43 #include "iwl-shared.h"
44
45 const char *get_cmd_string(u8 cmd)
46 {
47 switch (cmd) {
48 IWL_CMD(REPLY_ALIVE);
49 IWL_CMD(REPLY_ERROR);
50 IWL_CMD(REPLY_RXON);
51 IWL_CMD(REPLY_RXON_ASSOC);
52 IWL_CMD(REPLY_QOS_PARAM);
53 IWL_CMD(REPLY_RXON_TIMING);
54 IWL_CMD(REPLY_ADD_STA);
55 IWL_CMD(REPLY_REMOVE_STA);
56 IWL_CMD(REPLY_REMOVE_ALL_STA);
57 IWL_CMD(REPLY_TXFIFO_FLUSH);
58 IWL_CMD(REPLY_WEPKEY);
59 IWL_CMD(REPLY_TX);
60 IWL_CMD(REPLY_LEDS_CMD);
61 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
62 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
63 IWL_CMD(COEX_MEDIUM_NOTIFICATION);
64 IWL_CMD(COEX_EVENT_CMD);
65 IWL_CMD(REPLY_QUIET_CMD);
66 IWL_CMD(REPLY_CHANNEL_SWITCH);
67 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
68 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
69 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
70 IWL_CMD(POWER_TABLE_CMD);
71 IWL_CMD(PM_SLEEP_NOTIFICATION);
72 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
73 IWL_CMD(REPLY_SCAN_CMD);
74 IWL_CMD(REPLY_SCAN_ABORT_CMD);
75 IWL_CMD(SCAN_START_NOTIFICATION);
76 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
77 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
78 IWL_CMD(BEACON_NOTIFICATION);
79 IWL_CMD(REPLY_TX_BEACON);
80 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
81 IWL_CMD(QUIET_NOTIFICATION);
82 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
83 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
84 IWL_CMD(REPLY_BT_CONFIG);
85 IWL_CMD(REPLY_STATISTICS_CMD);
86 IWL_CMD(STATISTICS_NOTIFICATION);
87 IWL_CMD(REPLY_CARD_STATE_CMD);
88 IWL_CMD(CARD_STATE_NOTIFICATION);
89 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
90 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
91 IWL_CMD(SENSITIVITY_CMD);
92 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
93 IWL_CMD(REPLY_RX_PHY_CMD);
94 IWL_CMD(REPLY_RX_MPDU_CMD);
95 IWL_CMD(REPLY_RX);
96 IWL_CMD(REPLY_COMPRESSED_BA);
97 IWL_CMD(CALIBRATION_CFG_CMD);
98 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
99 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
100 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
101 IWL_CMD(TEMPERATURE_NOTIFICATION);
102 IWL_CMD(TX_ANT_CONFIGURATION_CMD);
103 IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF);
104 IWL_CMD(REPLY_BT_COEX_PRIO_TABLE);
105 IWL_CMD(REPLY_BT_COEX_PROT_ENV);
106 IWL_CMD(REPLY_WIPAN_PARAMS);
107 IWL_CMD(REPLY_WIPAN_RXON);
108 IWL_CMD(REPLY_WIPAN_RXON_TIMING);
109 IWL_CMD(REPLY_WIPAN_RXON_ASSOC);
110 IWL_CMD(REPLY_WIPAN_QOS_PARAM);
111 IWL_CMD(REPLY_WIPAN_WEPKEY);
112 IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH);
113 IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION);
114 IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE);
115 IWL_CMD(REPLY_WOWLAN_PATTERNS);
116 IWL_CMD(REPLY_WOWLAN_WAKEUP_FILTER);
117 IWL_CMD(REPLY_WOWLAN_TSC_RSC_PARAMS);
118 IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS);
119 IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL);
120 IWL_CMD(REPLY_WOWLAN_GET_STATUS);
121 default:
122 return "UNKNOWN";
123
124 }
125 }
126
127 /******************************************************************************
128 *
129 * Generic RX handler implementations
130 *
131 ******************************************************************************/
132
133 static void iwl_rx_reply_error(struct iwl_priv *priv,
134 struct iwl_rx_mem_buffer *rxb)
135 {
136 struct iwl_rx_packet *pkt = rxb_addr(rxb);
137
138 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
139 "seq 0x%04X ser 0x%08X\n",
140 le32_to_cpu(pkt->u.err_resp.error_type),
141 get_cmd_string(pkt->u.err_resp.cmd_id),
142 pkt->u.err_resp.cmd_id,
143 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
144 le32_to_cpu(pkt->u.err_resp.error_info));
145 }
146
147 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
148 {
149 struct iwl_rx_packet *pkt = rxb_addr(rxb);
150 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
151 /*
152 * MULTI-FIXME
153 * See iwl_mac_channel_switch.
154 */
155 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
156 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
157
158 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
159 return;
160
161 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
162 rxon->channel = csa->channel;
163 ctx->staging.channel = csa->channel;
164 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
165 le16_to_cpu(csa->channel));
166 iwl_chswitch_done(priv, true);
167 } else {
168 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
169 le16_to_cpu(csa->channel));
170 iwl_chswitch_done(priv, false);
171 }
172 }
173
174
175 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
176 struct iwl_rx_mem_buffer *rxb)
177 {
178 struct iwl_rx_packet *pkt = rxb_addr(rxb);
179 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
180
181 if (!report->state) {
182 IWL_DEBUG_11H(priv,
183 "Spectrum Measure Notification: Start\n");
184 return;
185 }
186
187 memcpy(&priv->measure_report, report, sizeof(*report));
188 priv->measurement_status |= MEASUREMENT_READY;
189 }
190
191 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
192 struct iwl_rx_mem_buffer *rxb)
193 {
194 #ifdef CONFIG_IWLWIFI_DEBUG
195 struct iwl_rx_packet *pkt = rxb_addr(rxb);
196 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
197 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
198 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
199 #endif
200 }
201
202 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
203 struct iwl_rx_mem_buffer *rxb)
204 {
205 struct iwl_rx_packet *pkt = rxb_addr(rxb);
206 u32 __maybe_unused len =
207 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
208 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
209 "notification for %s:\n", len,
210 get_cmd_string(pkt->hdr.cmd));
211 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
212 }
213
214 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
215 struct iwl_rx_mem_buffer *rxb)
216 {
217 struct iwl_rx_packet *pkt = rxb_addr(rxb);
218 struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
219 #ifdef CONFIG_IWLWIFI_DEBUG
220 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
221 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
222
223 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
224 "tsf:0x%.8x%.8x rate:%d\n",
225 status & TX_STATUS_MSK,
226 beacon->beacon_notify_hdr.failure_frame,
227 le32_to_cpu(beacon->ibss_mgr_status),
228 le32_to_cpu(beacon->high_tsf),
229 le32_to_cpu(beacon->low_tsf), rate);
230 #endif
231
232 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
233
234 if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
235 queue_work(priv->shrd->workqueue, &priv->beacon_update);
236 }
237
238 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
239 #define ACK_CNT_RATIO (50)
240 #define BA_TIMEOUT_CNT (5)
241 #define BA_TIMEOUT_MAX (16)
242
243 /**
244 * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
245 *
246 * When the ACK count ratio is low and aggregated BA timeout retries exceeding
247 * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
248 * operation state.
249 */
250 static bool iwl_good_ack_health(struct iwl_priv *priv,
251 struct statistics_tx *cur)
252 {
253 int actual_delta, expected_delta, ba_timeout_delta;
254 struct statistics_tx *old;
255
256 if (priv->agg_tids_count)
257 return true;
258
259 old = &priv->statistics.tx;
260
261 actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
262 le32_to_cpu(old->actual_ack_cnt);
263 expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
264 le32_to_cpu(old->expected_ack_cnt);
265
266 /* Values should not be negative, but we do not trust the firmware */
267 if (actual_delta <= 0 || expected_delta <= 0)
268 return true;
269
270 ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
271 le32_to_cpu(old->agg.ba_timeout);
272
273 if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
274 ba_timeout_delta > BA_TIMEOUT_CNT) {
275 IWL_DEBUG_RADIO(priv, "deltas: actual %d expected %d ba_timeout %d\n",
276 actual_delta, expected_delta, ba_timeout_delta);
277
278 #ifdef CONFIG_IWLWIFI_DEBUGFS
279 /*
280 * This is ifdef'ed on DEBUGFS because otherwise the
281 * statistics aren't available. If DEBUGFS is set but
282 * DEBUG is not, these will just compile out.
283 */
284 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
285 priv->delta_stats.tx.rx_detected_cnt);
286 IWL_DEBUG_RADIO(priv,
287 "ack_or_ba_timeout_collision delta %d\n",
288 priv->delta_stats.tx.ack_or_ba_timeout_collision);
289 #endif
290
291 if (ba_timeout_delta >= BA_TIMEOUT_MAX)
292 return false;
293 }
294
295 return true;
296 }
297
298 /**
299 * iwl_good_plcp_health - checks for plcp error.
300 *
301 * When the plcp error is exceeding the thresholds, reset the radio
302 * to improve the throughput.
303 */
304 static bool iwl_good_plcp_health(struct iwl_priv *priv,
305 struct statistics_rx_phy *cur_ofdm,
306 struct statistics_rx_ht_phy *cur_ofdm_ht,
307 unsigned int msecs)
308 {
309 int delta;
310 int threshold = priv->cfg->base_params->plcp_delta_threshold;
311
312 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
313 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
314 return true;
315 }
316
317 delta = le32_to_cpu(cur_ofdm->plcp_err) -
318 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
319 le32_to_cpu(cur_ofdm_ht->plcp_err) -
320 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
321
322 /* Can be negative if firmware reset statistics */
323 if (delta <= 0)
324 return true;
325
326 if ((delta * 100 / msecs) > threshold) {
327 IWL_DEBUG_RADIO(priv,
328 "plcp health threshold %u delta %d msecs %u\n",
329 threshold, delta, msecs);
330 return false;
331 }
332
333 return true;
334 }
335
336 static void iwl_recover_from_statistics(struct iwl_priv *priv,
337 struct statistics_rx_phy *cur_ofdm,
338 struct statistics_rx_ht_phy *cur_ofdm_ht,
339 struct statistics_tx *tx,
340 unsigned long stamp)
341 {
342 unsigned int msecs;
343
344 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
345 return;
346
347 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
348
349 /* Only gather statistics and update time stamp when not associated */
350 if (!iwl_is_any_associated(priv))
351 return;
352
353 /* Do not check/recover when do not have enough statistics data */
354 if (msecs < 99)
355 return;
356
357 if (iwlagn_mod_params.ack_check && !iwl_good_ack_health(priv, tx)) {
358 IWL_ERR(priv, "low ack count detected, restart firmware\n");
359 if (!iwl_force_reset(priv, IWL_FW_RESET, false))
360 return;
361 }
362
363 if (iwlagn_mod_params.plcp_check &&
364 !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
365 iwl_force_reset(priv, IWL_RF_RESET, false);
366 }
367
368 /* Calculate noise level, based on measurements during network silence just
369 * before arriving beacon. This measurement can be done only if we know
370 * exactly when to expect beacons, therefore only when we're associated. */
371 static void iwl_rx_calc_noise(struct iwl_priv *priv)
372 {
373 struct statistics_rx_non_phy *rx_info;
374 int num_active_rx = 0;
375 int total_silence = 0;
376 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
377 int last_rx_noise;
378
379 rx_info = &priv->statistics.rx_non_phy;
380
381 bcn_silence_a =
382 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
383 bcn_silence_b =
384 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
385 bcn_silence_c =
386 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
387
388 if (bcn_silence_a) {
389 total_silence += bcn_silence_a;
390 num_active_rx++;
391 }
392 if (bcn_silence_b) {
393 total_silence += bcn_silence_b;
394 num_active_rx++;
395 }
396 if (bcn_silence_c) {
397 total_silence += bcn_silence_c;
398 num_active_rx++;
399 }
400
401 /* Average among active antennas */
402 if (num_active_rx)
403 last_rx_noise = (total_silence / num_active_rx) - 107;
404 else
405 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
406
407 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
408 bcn_silence_a, bcn_silence_b, bcn_silence_c,
409 last_rx_noise);
410 }
411
412 #ifdef CONFIG_IWLWIFI_DEBUGFS
413 /*
414 * based on the assumption of all statistics counter are in DWORD
415 * FIXME: This function is for debugging, do not deal with
416 * the case of counters roll-over.
417 */
418 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
419 __le32 *max_delta, __le32 *accum, int size)
420 {
421 int i;
422
423 for (i = 0;
424 i < size / sizeof(__le32);
425 i++, prev++, cur++, delta++, max_delta++, accum++) {
426 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
427 *delta = cpu_to_le32(
428 le32_to_cpu(*cur) - le32_to_cpu(*prev));
429 le32_add_cpu(accum, le32_to_cpu(*delta));
430 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
431 *max_delta = *delta;
432 }
433 }
434 }
435
436 static void
437 iwl_accumulative_statistics(struct iwl_priv *priv,
438 struct statistics_general_common *common,
439 struct statistics_rx_non_phy *rx_non_phy,
440 struct statistics_rx_phy *rx_ofdm,
441 struct statistics_rx_ht_phy *rx_ofdm_ht,
442 struct statistics_rx_phy *rx_cck,
443 struct statistics_tx *tx,
444 struct statistics_bt_activity *bt_activity)
445 {
446 #define ACCUM(_name) \
447 accum_stats((__le32 *)&priv->statistics._name, \
448 (__le32 *)_name, \
449 (__le32 *)&priv->delta_stats._name, \
450 (__le32 *)&priv->max_delta_stats._name, \
451 (__le32 *)&priv->accum_stats._name, \
452 sizeof(*_name));
453
454 ACCUM(common);
455 ACCUM(rx_non_phy);
456 ACCUM(rx_ofdm);
457 ACCUM(rx_ofdm_ht);
458 ACCUM(rx_cck);
459 ACCUM(tx);
460 if (bt_activity)
461 ACCUM(bt_activity);
462 #undef ACCUM
463 }
464 #else
465 static inline void
466 iwl_accumulative_statistics(struct iwl_priv *priv,
467 struct statistics_general_common *common,
468 struct statistics_rx_non_phy *rx_non_phy,
469 struct statistics_rx_phy *rx_ofdm,
470 struct statistics_rx_ht_phy *rx_ofdm_ht,
471 struct statistics_rx_phy *rx_cck,
472 struct statistics_tx *tx,
473 struct statistics_bt_activity *bt_activity)
474 {
475 }
476 #endif
477
478 static void iwl_rx_statistics(struct iwl_priv *priv,
479 struct iwl_rx_mem_buffer *rxb)
480 {
481 unsigned long stamp = jiffies;
482 const int reg_recalib_period = 60;
483 int change;
484 struct iwl_rx_packet *pkt = rxb_addr(rxb);
485 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
486 __le32 *flag;
487 struct statistics_general_common *common;
488 struct statistics_rx_non_phy *rx_non_phy;
489 struct statistics_rx_phy *rx_ofdm;
490 struct statistics_rx_ht_phy *rx_ofdm_ht;
491 struct statistics_rx_phy *rx_cck;
492 struct statistics_tx *tx;
493 struct statistics_bt_activity *bt_activity;
494
495 len -= sizeof(struct iwl_cmd_header); /* skip header */
496
497 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
498 len);
499
500 if (len == sizeof(struct iwl_bt_notif_statistics)) {
501 struct iwl_bt_notif_statistics *stats;
502 stats = &pkt->u.stats_bt;
503 flag = &stats->flag;
504 common = &stats->general.common;
505 rx_non_phy = &stats->rx.general.common;
506 rx_ofdm = &stats->rx.ofdm;
507 rx_ofdm_ht = &stats->rx.ofdm_ht;
508 rx_cck = &stats->rx.cck;
509 tx = &stats->tx;
510 bt_activity = &stats->general.activity;
511
512 #ifdef CONFIG_IWLWIFI_DEBUGFS
513 /* handle this exception directly */
514 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
515 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
516 le32_to_cpu(stats->rx.general.num_bt_kills));
517 #endif
518 } else if (len == sizeof(struct iwl_notif_statistics)) {
519 struct iwl_notif_statistics *stats;
520 stats = &pkt->u.stats;
521 flag = &stats->flag;
522 common = &stats->general.common;
523 rx_non_phy = &stats->rx.general;
524 rx_ofdm = &stats->rx.ofdm;
525 rx_ofdm_ht = &stats->rx.ofdm_ht;
526 rx_cck = &stats->rx.cck;
527 tx = &stats->tx;
528 bt_activity = NULL;
529 } else {
530 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
531 len, sizeof(struct iwl_bt_notif_statistics),
532 sizeof(struct iwl_notif_statistics));
533 return;
534 }
535
536 change = common->temperature != priv->statistics.common.temperature ||
537 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
538 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
539
540 iwl_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
541 rx_ofdm_ht, rx_cck, tx, bt_activity);
542
543 iwl_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
544
545 priv->statistics.flag = *flag;
546 memcpy(&priv->statistics.common, common, sizeof(*common));
547 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
548 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
549 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
550 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
551 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
552 #ifdef CONFIG_IWLWIFI_DEBUGFS
553 if (bt_activity)
554 memcpy(&priv->statistics.bt_activity, bt_activity,
555 sizeof(*bt_activity));
556 #endif
557
558 priv->rx_statistics_jiffies = stamp;
559
560 set_bit(STATUS_STATISTICS, &priv->shrd->status);
561
562 /* Reschedule the statistics timer to occur in
563 * reg_recalib_period seconds to ensure we get a
564 * thermal update even if the uCode doesn't give
565 * us one */
566 mod_timer(&priv->statistics_periodic, jiffies +
567 msecs_to_jiffies(reg_recalib_period * 1000));
568
569 if (unlikely(!test_bit(STATUS_SCANNING, &priv->shrd->status)) &&
570 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
571 iwl_rx_calc_noise(priv);
572 queue_work(priv->shrd->workqueue, &priv->run_time_calib_work);
573 }
574 if (priv->cfg->lib->temperature && change)
575 priv->cfg->lib->temperature(priv);
576 }
577
578 static void iwl_rx_reply_statistics(struct iwl_priv *priv,
579 struct iwl_rx_mem_buffer *rxb)
580 {
581 struct iwl_rx_packet *pkt = rxb_addr(rxb);
582
583 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
584 #ifdef CONFIG_IWLWIFI_DEBUGFS
585 memset(&priv->accum_stats, 0,
586 sizeof(priv->accum_stats));
587 memset(&priv->delta_stats, 0,
588 sizeof(priv->delta_stats));
589 memset(&priv->max_delta_stats, 0,
590 sizeof(priv->max_delta_stats));
591 #endif
592 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
593 }
594 iwl_rx_statistics(priv, rxb);
595 }
596
597 /* Handle notification from uCode that card's power state is changing
598 * due to software, hardware, or critical temperature RFKILL */
599 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
600 struct iwl_rx_mem_buffer *rxb)
601 {
602 struct iwl_rx_packet *pkt = rxb_addr(rxb);
603 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
604 unsigned long status = priv->shrd->status;
605
606 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
607 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
608 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
609 (flags & CT_CARD_DISABLED) ?
610 "Reached" : "Not reached");
611
612 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
613 CT_CARD_DISABLED)) {
614
615 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
616 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
617
618 iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
619 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
620
621 if (!(flags & RXON_CARD_DISABLED)) {
622 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
623 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
624 iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
625 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
626 }
627 if (flags & CT_CARD_DISABLED)
628 iwl_tt_enter_ct_kill(priv);
629 }
630 if (!(flags & CT_CARD_DISABLED))
631 iwl_tt_exit_ct_kill(priv);
632
633 if (flags & HW_CARD_DISABLED)
634 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
635 else
636 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
637
638
639 if (!(flags & RXON_CARD_DISABLED))
640 iwl_scan_cancel(priv);
641
642 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
643 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status)))
644 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
645 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
646 else
647 wake_up(&priv->shrd->wait_command_queue);
648 }
649
650 static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
651 struct iwl_rx_mem_buffer *rxb)
652
653 {
654 struct iwl_rx_packet *pkt = rxb_addr(rxb);
655 struct iwl_missed_beacon_notif *missed_beacon;
656
657 missed_beacon = &pkt->u.missed_beacon;
658 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
659 priv->missed_beacon_threshold) {
660 IWL_DEBUG_CALIB(priv,
661 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
662 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
663 le32_to_cpu(missed_beacon->total_missed_becons),
664 le32_to_cpu(missed_beacon->num_recvd_beacons),
665 le32_to_cpu(missed_beacon->num_expected_beacons));
666 if (!test_bit(STATUS_SCANNING, &priv->shrd->status))
667 iwl_init_sensitivity(priv);
668 }
669 }
670
671 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
672 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
673 static void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
674 struct iwl_rx_mem_buffer *rxb)
675 {
676 struct iwl_rx_packet *pkt = rxb_addr(rxb);
677
678 priv->last_phy_res_valid = true;
679 memcpy(&priv->last_phy_res, pkt->u.raw,
680 sizeof(struct iwl_rx_phy_res));
681 }
682
683 /*
684 * returns non-zero if packet should be dropped
685 */
686 static int iwl_set_decrypted_flag(struct iwl_priv *priv,
687 struct ieee80211_hdr *hdr,
688 u32 decrypt_res,
689 struct ieee80211_rx_status *stats)
690 {
691 u16 fc = le16_to_cpu(hdr->frame_control);
692
693 /*
694 * All contexts have the same setting here due to it being
695 * a module parameter, so OK to check any context.
696 */
697 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
698 RXON_FILTER_DIS_DECRYPT_MSK)
699 return 0;
700
701 if (!(fc & IEEE80211_FCTL_PROTECTED))
702 return 0;
703
704 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
705 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
706 case RX_RES_STATUS_SEC_TYPE_TKIP:
707 /* The uCode has got a bad phase 1 Key, pushes the packet.
708 * Decryption will be done in SW. */
709 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
710 RX_RES_STATUS_BAD_KEY_TTAK)
711 break;
712
713 case RX_RES_STATUS_SEC_TYPE_WEP:
714 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
715 RX_RES_STATUS_BAD_ICV_MIC) {
716 /* bad ICV, the packet is destroyed since the
717 * decryption is inplace, drop it */
718 IWL_DEBUG_RX(priv, "Packet destroyed\n");
719 return -1;
720 }
721 case RX_RES_STATUS_SEC_TYPE_CCMP:
722 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
723 RX_RES_STATUS_DECRYPT_OK) {
724 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
725 stats->flag |= RX_FLAG_DECRYPTED;
726 }
727 break;
728
729 default:
730 break;
731 }
732 return 0;
733 }
734
735 static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
736 struct ieee80211_hdr *hdr,
737 u16 len,
738 u32 ampdu_status,
739 struct iwl_rx_mem_buffer *rxb,
740 struct ieee80211_rx_status *stats)
741 {
742 struct sk_buff *skb;
743 __le16 fc = hdr->frame_control;
744 struct iwl_rxon_context *ctx;
745
746 /* We only process data packets if the interface is open */
747 if (unlikely(!priv->is_open)) {
748 IWL_DEBUG_DROP_LIMIT(priv,
749 "Dropping packet while interface is not open.\n");
750 return;
751 }
752
753 /* In case of HW accelerated crypto and bad decryption, drop */
754 if (!iwlagn_mod_params.sw_crypto &&
755 iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
756 return;
757
758 skb = dev_alloc_skb(128);
759 if (!skb) {
760 IWL_ERR(priv, "dev_alloc_skb failed\n");
761 return;
762 }
763
764 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
765
766 iwl_update_stats(priv, false, fc, len);
767
768 /*
769 * Wake any queues that were stopped due to a passive channel tx
770 * failure. This can happen because the regulatory enforcement in
771 * the device waits for a beacon before allowing transmission,
772 * sometimes even after already having transmitted frames for the
773 * association because the new RXON may reset the information.
774 */
775 if (unlikely(ieee80211_is_beacon(fc))) {
776 for_each_context(priv, ctx) {
777 if (!ctx->last_tx_rejected)
778 continue;
779 if (compare_ether_addr(hdr->addr3,
780 ctx->active.bssid_addr))
781 continue;
782 ctx->last_tx_rejected = false;
783 iwl_trans_wake_any_queue(trans(priv), ctx->ctxid);
784 }
785 }
786
787 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
788
789 ieee80211_rx(priv->hw, skb);
790 rxb->page = NULL;
791 }
792
793 static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
794 {
795 u32 decrypt_out = 0;
796
797 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
798 RX_RES_STATUS_STATION_FOUND)
799 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
800 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
801
802 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
803
804 /* packet was not encrypted */
805 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
806 RX_RES_STATUS_SEC_TYPE_NONE)
807 return decrypt_out;
808
809 /* packet was encrypted with unknown alg */
810 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
811 RX_RES_STATUS_SEC_TYPE_ERR)
812 return decrypt_out;
813
814 /* decryption was not done in HW */
815 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
816 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
817 return decrypt_out;
818
819 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
820
821 case RX_RES_STATUS_SEC_TYPE_CCMP:
822 /* alg is CCM: check MIC only */
823 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
824 /* Bad MIC */
825 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
826 else
827 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
828
829 break;
830
831 case RX_RES_STATUS_SEC_TYPE_TKIP:
832 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
833 /* Bad TTAK */
834 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
835 break;
836 }
837 /* fall through if TTAK OK */
838 default:
839 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
840 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
841 else
842 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
843 break;
844 }
845
846 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
847 decrypt_in, decrypt_out);
848
849 return decrypt_out;
850 }
851
852 /* Calc max signal level (dBm) among 3 possible receivers */
853 static int iwlagn_calc_rssi(struct iwl_priv *priv,
854 struct iwl_rx_phy_res *rx_resp)
855 {
856 /* data from PHY/DSP regarding signal strength, etc.,
857 * contents are always there, not configurable by host
858 */
859 struct iwlagn_non_cfg_phy *ncphy =
860 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
861 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
862 u8 agc;
863
864 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
865 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
866
867 /* Find max rssi among 3 possible receivers.
868 * These values are measured by the digital signal processor (DSP).
869 * They should stay fairly constant even as the signal strength varies,
870 * if the radio's automatic gain control (AGC) is working right.
871 * AGC value (see below) will provide the "interesting" info.
872 */
873 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
874 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
875 IWLAGN_OFDM_RSSI_A_BIT_POS;
876 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
877 IWLAGN_OFDM_RSSI_B_BIT_POS;
878 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
879 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
880 IWLAGN_OFDM_RSSI_C_BIT_POS;
881
882 max_rssi = max_t(u32, rssi_a, rssi_b);
883 max_rssi = max_t(u32, max_rssi, rssi_c);
884
885 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
886 rssi_a, rssi_b, rssi_c, max_rssi, agc);
887
888 /* dBm = max_rssi dB - agc dB - constant.
889 * Higher AGC (higher radio gain) means lower signal. */
890 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
891 }
892
893 /* Called for REPLY_RX (legacy ABG frames), or
894 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
895 static void iwl_rx_reply_rx(struct iwl_priv *priv,
896 struct iwl_rx_mem_buffer *rxb)
897 {
898 struct ieee80211_hdr *header;
899 struct ieee80211_rx_status rx_status;
900 struct iwl_rx_packet *pkt = rxb_addr(rxb);
901 struct iwl_rx_phy_res *phy_res;
902 __le32 rx_pkt_status;
903 struct iwl_rx_mpdu_res_start *amsdu;
904 u32 len;
905 u32 ampdu_status;
906 u32 rate_n_flags;
907
908 /**
909 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
910 * REPLY_RX: physical layer info is in this buffer
911 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
912 * command and cached in priv->last_phy_res
913 *
914 * Here we set up local variables depending on which command is
915 * received.
916 */
917 if (pkt->hdr.cmd == REPLY_RX) {
918 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
919 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
920 + phy_res->cfg_phy_cnt);
921
922 len = le16_to_cpu(phy_res->byte_count);
923 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
924 phy_res->cfg_phy_cnt + len);
925 ampdu_status = le32_to_cpu(rx_pkt_status);
926 } else {
927 if (!priv->last_phy_res_valid) {
928 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
929 return;
930 }
931 phy_res = &priv->last_phy_res;
932 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
933 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
934 len = le16_to_cpu(amsdu->byte_count);
935 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
936 ampdu_status = iwl_translate_rx_status(priv,
937 le32_to_cpu(rx_pkt_status));
938 }
939
940 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
941 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
942 phy_res->cfg_phy_cnt);
943 return;
944 }
945
946 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
947 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
948 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
949 le32_to_cpu(rx_pkt_status));
950 return;
951 }
952
953 /* This will be used in several places later */
954 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
955
956 /* rx_status carries information about the packet to mac80211 */
957 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
958 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
959 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
960 rx_status.freq =
961 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
962 rx_status.band);
963 rx_status.rate_idx =
964 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
965 rx_status.flag = 0;
966
967 /* TSF isn't reliable. In order to allow smooth user experience,
968 * this W/A doesn't propagate it to the mac80211 */
969 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
970
971 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
972
973 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
974 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
975
976 iwl_dbg_log_rx_data_frame(priv, len, header);
977 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
978 rx_status.signal, (unsigned long long)rx_status.mactime);
979
980 /*
981 * "antenna number"
982 *
983 * It seems that the antenna field in the phy flags value
984 * is actually a bit field. This is undefined by radiotap,
985 * it wants an actual antenna number but I always get "7"
986 * for most legacy frames I receive indicating that the
987 * same frame was received on all three RX chains.
988 *
989 * I think this field should be removed in favor of a
990 * new 802.11n radiotap field "RX chains" that is defined
991 * as a bitmask.
992 */
993 rx_status.antenna =
994 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
995 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
996
997 /* set the preamble flag if appropriate */
998 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
999 rx_status.flag |= RX_FLAG_SHORTPRE;
1000
1001 /* Set up the HT phy flags */
1002 if (rate_n_flags & RATE_MCS_HT_MSK)
1003 rx_status.flag |= RX_FLAG_HT;
1004 if (rate_n_flags & RATE_MCS_HT40_MSK)
1005 rx_status.flag |= RX_FLAG_40MHZ;
1006 if (rate_n_flags & RATE_MCS_SGI_MSK)
1007 rx_status.flag |= RX_FLAG_SHORT_GI;
1008
1009 iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1010 rxb, &rx_status);
1011 }
1012
1013 /**
1014 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1015 *
1016 * Setup the RX handlers for each of the reply types sent from the uCode
1017 * to the host.
1018 */
1019 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1020 {
1021 void (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
1022
1023 handlers = priv->rx_handlers;
1024
1025 handlers[REPLY_ERROR] = iwl_rx_reply_error;
1026 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1027 handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif;
1028 handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1029 handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl_rx_pm_debug_statistics_notif;
1030 handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
1031
1032 /*
1033 * The same handler is used for both the REPLY to a discrete
1034 * statistics request from the host as well as for the periodic
1035 * statistics notifications (after received beacons) from the uCode.
1036 */
1037 handlers[REPLY_STATISTICS_CMD] = iwl_rx_reply_statistics;
1038 handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
1039
1040 iwl_setup_rx_scan_handlers(priv);
1041
1042 handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
1043 handlers[MISSED_BEACONS_NOTIFICATION] = iwl_rx_missed_beacon_notif;
1044
1045 /* Rx handlers */
1046 handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1047 handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1048
1049 /* block ack */
1050 handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba;
1051
1052 /* init calibration handlers */
1053 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
1054 iwlagn_rx_calib_result;
1055 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1056
1057 /* set up notification wait support */
1058 spin_lock_init(&priv->notif_wait_lock);
1059 INIT_LIST_HEAD(&priv->notif_waits);
1060 init_waitqueue_head(&priv->notif_waitq);
1061
1062 /* Set up BT Rx handlers */
1063 if (priv->cfg->lib->bt_rx_handler_setup)
1064 priv->cfg->lib->bt_rx_handler_setup(priv);
1065
1066 }
1067
1068 void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1069 {
1070 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1071
1072 /*
1073 * Do the notification wait before RX handlers so
1074 * even if the RX handler consumes the RXB we have
1075 * access to it in the notification wait entry.
1076 */
1077 if (!list_empty(&priv->notif_waits)) {
1078 struct iwl_notification_wait *w;
1079
1080 spin_lock(&priv->notif_wait_lock);
1081 list_for_each_entry(w, &priv->notif_waits, list) {
1082 if (w->cmd != pkt->hdr.cmd)
1083 continue;
1084 IWL_DEBUG_RX(priv,
1085 "Notif: %s, 0x%02x - wake the callers up\n",
1086 get_cmd_string(pkt->hdr.cmd),
1087 pkt->hdr.cmd);
1088 w->triggered = true;
1089 if (w->fn)
1090 w->fn(priv, pkt, w->fn_data);
1091 }
1092 spin_unlock(&priv->notif_wait_lock);
1093
1094 wake_up_all(&priv->notif_waitq);
1095 }
1096
1097 if (priv->pre_rx_handler)
1098 priv->pre_rx_handler(priv, rxb);
1099
1100 /* Based on type of command response or notification,
1101 * handle those that need handling via function in
1102 * rx_handlers table. See iwl_setup_rx_handlers() */
1103 if (priv->rx_handlers[pkt->hdr.cmd]) {
1104 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1105 priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1106 } else {
1107 /* No handling needed */
1108 IWL_DEBUG_RX(priv,
1109 "No handler needed for %s, 0x%02x\n",
1110 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1111 }
1112 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree