projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-rx.c
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 portionhelp 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-io.h"
39 #include "iwl-agn-calib.h"
40 #include "iwl-agn.h"
41 #include "iwl-shared.h"
42
43 const char *get_cmd_string(u8 cmd)
44 {
45 switch (cmd) {
46 IWL_CMD(REPLY_ALIVE);
47 IWL_CMD(REPLY_ERROR);
48 IWL_CMD(REPLY_ECHO);
49 IWL_CMD(REPLY_RXON);
50 IWL_CMD(REPLY_RXON_ASSOC);
51 IWL_CMD(REPLY_QOS_PARAM);
52 IWL_CMD(REPLY_RXON_TIMING);
53 IWL_CMD(REPLY_ADD_STA);
54 IWL_CMD(REPLY_REMOVE_STA);
55 IWL_CMD(REPLY_REMOVE_ALL_STA);
56 IWL_CMD(REPLY_TXFIFO_FLUSH);
57 IWL_CMD(REPLY_WEPKEY);
58 IWL_CMD(REPLY_TX);
59 IWL_CMD(REPLY_LEDS_CMD);
60 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
61 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
62 IWL_CMD(COEX_MEDIUM_NOTIFICATION);
63 IWL_CMD(COEX_EVENT_CMD);
64 IWL_CMD(REPLY_QUIET_CMD);
65 IWL_CMD(REPLY_CHANNEL_SWITCH);
66 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
67 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
68 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
69 IWL_CMD(POWER_TABLE_CMD);
70 IWL_CMD(PM_SLEEP_NOTIFICATION);
71 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
72 IWL_CMD(REPLY_SCAN_CMD);
73 IWL_CMD(REPLY_SCAN_ABORT_CMD);
74 IWL_CMD(SCAN_START_NOTIFICATION);
75 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
76 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
77 IWL_CMD(BEACON_NOTIFICATION);
78 IWL_CMD(REPLY_TX_BEACON);
79 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
80 IWL_CMD(QUIET_NOTIFICATION);
81 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
82 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
83 IWL_CMD(REPLY_BT_CONFIG);
84 IWL_CMD(REPLY_STATISTICS_CMD);
85 IWL_CMD(STATISTICS_NOTIFICATION);
86 IWL_CMD(REPLY_CARD_STATE_CMD);
87 IWL_CMD(CARD_STATE_NOTIFICATION);
88 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
89 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
90 IWL_CMD(SENSITIVITY_CMD);
91 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
92 IWL_CMD(REPLY_RX_PHY_CMD);
93 IWL_CMD(REPLY_RX_MPDU_CMD);
94 IWL_CMD(REPLY_RX);
95 IWL_CMD(REPLY_COMPRESSED_BA);
96 IWL_CMD(CALIBRATION_CFG_CMD);
97 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
98 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
99 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
100 IWL_CMD(TEMPERATURE_NOTIFICATION);
101 IWL_CMD(TX_ANT_CONFIGURATION_CMD);
102 IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF);
103 IWL_CMD(REPLY_BT_COEX_PRIO_TABLE);
104 IWL_CMD(REPLY_BT_COEX_PROT_ENV);
105 IWL_CMD(REPLY_WIPAN_PARAMS);
106 IWL_CMD(REPLY_WIPAN_RXON);
107 IWL_CMD(REPLY_WIPAN_RXON_TIMING);
108 IWL_CMD(REPLY_WIPAN_RXON_ASSOC);
109 IWL_CMD(REPLY_WIPAN_QOS_PARAM);
110 IWL_CMD(REPLY_WIPAN_WEPKEY);
111 IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH);
112 IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION);
113 IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE);
114 IWL_CMD(REPLY_WOWLAN_PATTERNS);
115 IWL_CMD(REPLY_WOWLAN_WAKEUP_FILTER);
116 IWL_CMD(REPLY_WOWLAN_TSC_RSC_PARAMS);
117 IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS);
118 IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL);
119 IWL_CMD(REPLY_WOWLAN_GET_STATUS);
120 default:
121 return "UNKNOWN";
122
123 }
124 }
125
126 /******************************************************************************
127 *
128 * Generic RX handler implementations
129 *
130 ******************************************************************************/
131
132 static int iwlagn_rx_reply_error(struct iwl_priv *priv,
133 struct iwl_rx_mem_buffer *rxb,
134 struct iwl_device_cmd *cmd)
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 return 0;
146 }
147
148 static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
149 struct iwl_device_cmd *cmd)
150 {
151 struct iwl_rx_packet *pkt = rxb_addr(rxb);
152 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
153 /*
154 * MULTI-FIXME
155 * See iwlagn_mac_channel_switch.
156 */
157 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
158 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
159
160 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
161 return 0;
162
163 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
164 rxon->channel = csa->channel;
165 ctx->staging.channel = csa->channel;
166 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
167 le16_to_cpu(csa->channel));
168 iwl_chswitch_done(priv, true);
169 } else {
170 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
171 le16_to_cpu(csa->channel));
172 iwl_chswitch_done(priv, false);
173 }
174 return 0;
175 }
176
177
178 static int iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
179 struct iwl_rx_mem_buffer *rxb,
180 struct iwl_device_cmd *cmd)
181 {
182 struct iwl_rx_packet *pkt = rxb_addr(rxb);
183 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
184
185 if (!report->state) {
186 IWL_DEBUG_11H(priv,
187 "Spectrum Measure Notification: Start\n");
188 return 0;
189 }
190
191 memcpy(&priv->measure_report, report, sizeof(*report));
192 priv->measurement_status |= MEASUREMENT_READY;
193 return 0;
194 }
195
196 static int iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
197 struct iwl_rx_mem_buffer *rxb,
198 struct iwl_device_cmd *cmd)
199 {
200 #ifdef CONFIG_IWLWIFI_DEBUG
201 struct iwl_rx_packet *pkt = rxb_addr(rxb);
202 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
203 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
204 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
205 #endif
206 return 0;
207 }
208
209 static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
210 struct iwl_rx_mem_buffer *rxb,
211 struct iwl_device_cmd *cmd)
212 {
213 struct iwl_rx_packet *pkt = rxb_addr(rxb);
214 u32 __maybe_unused len =
215 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
216 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
217 "notification for %s:\n", len,
218 get_cmd_string(pkt->hdr.cmd));
219 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
220 return 0;
221 }
222
223 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
224 struct iwl_rx_mem_buffer *rxb,
225 struct iwl_device_cmd *cmd)
226 {
227 struct iwl_rx_packet *pkt = rxb_addr(rxb);
228 struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
229 #ifdef CONFIG_IWLWIFI_DEBUG
230 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
231 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
232
233 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
234 "tsf:0x%.8x%.8x rate:%d\n",
235 status & TX_STATUS_MSK,
236 beacon->beacon_notify_hdr.failure_frame,
237 le32_to_cpu(beacon->ibss_mgr_status),
238 le32_to_cpu(beacon->high_tsf),
239 le32_to_cpu(beacon->low_tsf), rate);
240 #endif
241
242 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
243
244 return 0;
245 }
246
247 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
248 #define ACK_CNT_RATIO (50)
249 #define BA_TIMEOUT_CNT (5)
250 #define BA_TIMEOUT_MAX (16)
251
252 /**
253 * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
254 *
255 * When the ACK count ratio is low and aggregated BA timeout retries exceeding
256 * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
257 * operation state.
258 */
259 static bool iwlagn_good_ack_health(struct iwl_priv *priv,
260 struct statistics_tx *cur)
261 {
262 int actual_delta, expected_delta, ba_timeout_delta;
263 struct statistics_tx *old;
264
265 if (priv->agg_tids_count)
266 return true;
267
268 old = &priv->statistics.tx;
269
270 actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
271 le32_to_cpu(old->actual_ack_cnt);
272 expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
273 le32_to_cpu(old->expected_ack_cnt);
274
275 /* Values should not be negative, but we do not trust the firmware */
276 if (actual_delta <= 0 || expected_delta <= 0)
277 return true;
278
279 ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
280 le32_to_cpu(old->agg.ba_timeout);
281
282 if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
283 ba_timeout_delta > BA_TIMEOUT_CNT) {
284 IWL_DEBUG_RADIO(priv,
285 "deltas: actual %d expected %d ba_timeout %d\n",
286 actual_delta, expected_delta, ba_timeout_delta);
287
288 #ifdef CONFIG_IWLWIFI_DEBUGFS
289 /*
290 * This is ifdef'ed on DEBUGFS because otherwise the
291 * statistics aren't available. If DEBUGFS is set but
292 * DEBUG is not, these will just compile out.
293 */
294 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
295 priv->delta_stats.tx.rx_detected_cnt);
296 IWL_DEBUG_RADIO(priv,
297 "ack_or_ba_timeout_collision delta %d\n",
298 priv->delta_stats.tx.ack_or_ba_timeout_collision);
299 #endif
300
301 if (ba_timeout_delta >= BA_TIMEOUT_MAX)
302 return false;
303 }
304
305 return true;
306 }
307
308 /**
309 * iwl_good_plcp_health - checks for plcp error.
310 *
311 * When the plcp error is exceeding the thresholds, reset the radio
312 * to improve the throughput.
313 */
314 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
315 struct statistics_rx_phy *cur_ofdm,
316 struct statistics_rx_ht_phy *cur_ofdm_ht,
317 unsigned int msecs)
318 {
319 int delta;
320 int threshold = priv->cfg->base_params->plcp_delta_threshold;
321
322 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
323 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
324 return true;
325 }
326
327 delta = le32_to_cpu(cur_ofdm->plcp_err) -
328 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
329 le32_to_cpu(cur_ofdm_ht->plcp_err) -
330 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
331
332 /* Can be negative if firmware reset statistics */
333 if (delta <= 0)
334 return true;
335
336 if ((delta * 100 / msecs) > threshold) {
337 IWL_DEBUG_RADIO(priv,
338 "plcp health threshold %u delta %d msecs %u\n",
339 threshold, delta, msecs);
340 return false;
341 }
342
343 return true;
344 }
345
346 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
347 struct statistics_rx_phy *cur_ofdm,
348 struct statistics_rx_ht_phy *cur_ofdm_ht,
349 struct statistics_tx *tx,
350 unsigned long stamp)
351 {
352 unsigned int msecs;
353
354 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
355 return;
356
357 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
358
359 /* Only gather statistics and update time stamp when not associated */
360 if (!iwl_is_any_associated(priv))
361 return;
362
363 /* Do not check/recover when do not have enough statistics data */
364 if (msecs < 99)
365 return;
366
367 if (iwlagn_mod_params.ack_check && !iwlagn_good_ack_health(priv, tx)) {
368 IWL_ERR(priv, "low ack count detected, restart firmware\n");
369 if (!iwl_force_reset(priv, IWL_FW_RESET, false))
370 return;
371 }
372
373 if (iwlagn_mod_params.plcp_check &&
374 !iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
375 iwl_force_reset(priv, IWL_RF_RESET, false);
376 }
377
378 /* Calculate noise level, based on measurements during network silence just
379 * before arriving beacon. This measurement can be done only if we know
380 * exactly when to expect beacons, therefore only when we're associated. */
381 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
382 {
383 struct statistics_rx_non_phy *rx_info;
384 int num_active_rx = 0;
385 int total_silence = 0;
386 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
387 int last_rx_noise;
388
389 rx_info = &priv->statistics.rx_non_phy;
390
391 bcn_silence_a =
392 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
393 bcn_silence_b =
394 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
395 bcn_silence_c =
396 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
397
398 if (bcn_silence_a) {
399 total_silence += bcn_silence_a;
400 num_active_rx++;
401 }
402 if (bcn_silence_b) {
403 total_silence += bcn_silence_b;
404 num_active_rx++;
405 }
406 if (bcn_silence_c) {
407 total_silence += bcn_silence_c;
408 num_active_rx++;
409 }
410
411 /* Average among active antennas */
412 if (num_active_rx)
413 last_rx_noise = (total_silence / num_active_rx) - 107;
414 else
415 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
416
417 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
418 bcn_silence_a, bcn_silence_b, bcn_silence_c,
419 last_rx_noise);
420 }
421
422 #ifdef CONFIG_IWLWIFI_DEBUGFS
423 /*
424 * based on the assumption of all statistics counter are in DWORD
425 * FIXME: This function is for debugging, do not deal with
426 * the case of counters roll-over.
427 */
428 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
429 __le32 *max_delta, __le32 *accum, int size)
430 {
431 int i;
432
433 for (i = 0;
434 i < size / sizeof(__le32);
435 i++, prev++, cur++, delta++, max_delta++, accum++) {
436 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
437 *delta = cpu_to_le32(
438 le32_to_cpu(*cur) - le32_to_cpu(*prev));
439 le32_add_cpu(accum, le32_to_cpu(*delta));
440 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
441 *max_delta = *delta;
442 }
443 }
444 }
445
446 static void
447 iwlagn_accumulative_statistics(struct iwl_priv *priv,
448 struct statistics_general_common *common,
449 struct statistics_rx_non_phy *rx_non_phy,
450 struct statistics_rx_phy *rx_ofdm,
451 struct statistics_rx_ht_phy *rx_ofdm_ht,
452 struct statistics_rx_phy *rx_cck,
453 struct statistics_tx *tx,
454 struct statistics_bt_activity *bt_activity)
455 {
456 #define ACCUM(_name) \
457 accum_stats((__le32 *)&priv->statistics._name, \
458 (__le32 *)_name, \
459 (__le32 *)&priv->delta_stats._name, \
460 (__le32 *)&priv->max_delta_stats._name, \
461 (__le32 *)&priv->accum_stats._name, \
462 sizeof(*_name));
463
464 ACCUM(common);
465 ACCUM(rx_non_phy);
466 ACCUM(rx_ofdm);
467 ACCUM(rx_ofdm_ht);
468 ACCUM(rx_cck);
469 ACCUM(tx);
470 if (bt_activity)
471 ACCUM(bt_activity);
472 #undef ACCUM
473 }
474 #else
475 static inline void
476 iwlagn_accumulative_statistics(struct iwl_priv *priv,
477 struct statistics_general_common *common,
478 struct statistics_rx_non_phy *rx_non_phy,
479 struct statistics_rx_phy *rx_ofdm,
480 struct statistics_rx_ht_phy *rx_ofdm_ht,
481 struct statistics_rx_phy *rx_cck,
482 struct statistics_tx *tx,
483 struct statistics_bt_activity *bt_activity)
484 {
485 }
486 #endif
487
488 static int iwlagn_rx_statistics(struct iwl_priv *priv,
489 struct iwl_rx_mem_buffer *rxb,
490 struct iwl_device_cmd *cmd)
491 {
492 unsigned long stamp = jiffies;
493 const int reg_recalib_period = 60;
494 int change;
495 struct iwl_rx_packet *pkt = rxb_addr(rxb);
496 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
497 __le32 *flag;
498 struct statistics_general_common *common;
499 struct statistics_rx_non_phy *rx_non_phy;
500 struct statistics_rx_phy *rx_ofdm;
501 struct statistics_rx_ht_phy *rx_ofdm_ht;
502 struct statistics_rx_phy *rx_cck;
503 struct statistics_tx *tx;
504 struct statistics_bt_activity *bt_activity;
505
506 len -= sizeof(struct iwl_cmd_header); /* skip header */
507
508 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
509 len);
510
511 if (len == sizeof(struct iwl_bt_notif_statistics)) {
512 struct iwl_bt_notif_statistics *stats;
513 stats = &pkt->u.stats_bt;
514 flag = &stats->flag;
515 common = &stats->general.common;
516 rx_non_phy = &stats->rx.general.common;
517 rx_ofdm = &stats->rx.ofdm;
518 rx_ofdm_ht = &stats->rx.ofdm_ht;
519 rx_cck = &stats->rx.cck;
520 tx = &stats->tx;
521 bt_activity = &stats->general.activity;
522
523 #ifdef CONFIG_IWLWIFI_DEBUGFS
524 /* handle this exception directly */
525 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
526 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
527 le32_to_cpu(stats->rx.general.num_bt_kills));
528 #endif
529 } else if (len == sizeof(struct iwl_notif_statistics)) {
530 struct iwl_notif_statistics *stats;
531 stats = &pkt->u.stats;
532 flag = &stats->flag;
533 common = &stats->general.common;
534 rx_non_phy = &stats->rx.general;
535 rx_ofdm = &stats->rx.ofdm;
536 rx_ofdm_ht = &stats->rx.ofdm_ht;
537 rx_cck = &stats->rx.cck;
538 tx = &stats->tx;
539 bt_activity = NULL;
540 } else {
541 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
542 len, sizeof(struct iwl_bt_notif_statistics),
543 sizeof(struct iwl_notif_statistics));
544 return 0;
545 }
546
547 change = common->temperature != priv->statistics.common.temperature ||
548 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
549 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
550
551 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
552 rx_ofdm_ht, rx_cck, tx, bt_activity);
553
554 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
555
556 priv->statistics.flag = *flag;
557 memcpy(&priv->statistics.common, common, sizeof(*common));
558 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
559 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
560 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
561 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
562 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
563 #ifdef CONFIG_IWLWIFI_DEBUGFS
564 if (bt_activity)
565 memcpy(&priv->statistics.bt_activity, bt_activity,
566 sizeof(*bt_activity));
567 #endif
568
569 priv->rx_statistics_jiffies = stamp;
570
571 set_bit(STATUS_STATISTICS, &priv->shrd->status);
572
573 /* Reschedule the statistics timer to occur in
574 * reg_recalib_period seconds to ensure we get a
575 * thermal update even if the uCode doesn't give
576 * us one */
577 mod_timer(&priv->statistics_periodic, jiffies +
578 msecs_to_jiffies(reg_recalib_period * 1000));
579
580 if (unlikely(!test_bit(STATUS_SCANNING, &priv->shrd->status)) &&
581 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
582 iwlagn_rx_calc_noise(priv);
583 queue_work(priv->shrd->workqueue, &priv->run_time_calib_work);
584 }
585 if (priv->cfg->lib->temperature && change)
586 priv->cfg->lib->temperature(priv);
587 return 0;
588 }
589
590 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
591 struct iwl_rx_mem_buffer *rxb,
592 struct iwl_device_cmd *cmd)
593 {
594 struct iwl_rx_packet *pkt = rxb_addr(rxb);
595
596 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
597 #ifdef CONFIG_IWLWIFI_DEBUGFS
598 memset(&priv->accum_stats, 0,
599 sizeof(priv->accum_stats));
600 memset(&priv->delta_stats, 0,
601 sizeof(priv->delta_stats));
602 memset(&priv->max_delta_stats, 0,
603 sizeof(priv->max_delta_stats));
604 #endif
605 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
606 }
607 iwlagn_rx_statistics(priv, rxb, cmd);
608 return 0;
609 }
610
611 /* Handle notification from uCode that card's power state is changing
612 * due to software, hardware, or critical temperature RFKILL */
613 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
614 struct iwl_rx_mem_buffer *rxb,
615 struct iwl_device_cmd *cmd)
616 {
617 struct iwl_rx_packet *pkt = rxb_addr(rxb);
618 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
619 unsigned long status = priv->shrd->status;
620
621 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
622 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
623 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
624 (flags & CT_CARD_DISABLED) ?
625 "Reached" : "Not reached");
626
627 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
628 CT_CARD_DISABLED)) {
629
630 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
631 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
632
633 iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
634 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
635
636 if (!(flags & RXON_CARD_DISABLED)) {
637 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
638 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
639 iwl_write_direct32(bus(priv), HBUS_TARG_MBX_C,
640 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
641 }
642 if (flags & CT_CARD_DISABLED)
643 iwl_tt_enter_ct_kill(priv);
644 }
645 if (!(flags & CT_CARD_DISABLED))
646 iwl_tt_exit_ct_kill(priv);
647
648 if (flags & HW_CARD_DISABLED)
649 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
650 else
651 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
652
653
654 if (!(flags & RXON_CARD_DISABLED))
655 iwl_scan_cancel(priv);
656
657 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
658 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status)))
659 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
660 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
661 else
662 wake_up(&priv->shrd->wait_command_queue);
663 return 0;
664 }
665
666 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
667 struct iwl_rx_mem_buffer *rxb,
668 struct iwl_device_cmd *cmd)
669
670 {
671 struct iwl_rx_packet *pkt = rxb_addr(rxb);
672 struct iwl_missed_beacon_notif *missed_beacon;
673
674 missed_beacon = &pkt->u.missed_beacon;
675 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
676 priv->missed_beacon_threshold) {
677 IWL_DEBUG_CALIB(priv,
678 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
679 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
680 le32_to_cpu(missed_beacon->total_missed_becons),
681 le32_to_cpu(missed_beacon->num_recvd_beacons),
682 le32_to_cpu(missed_beacon->num_expected_beacons));
683 if (!test_bit(STATUS_SCANNING, &priv->shrd->status))
684 iwl_init_sensitivity(priv);
685 }
686 return 0;
687 }
688
689 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
690 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
691 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
692 struct iwl_rx_mem_buffer *rxb,
693 struct iwl_device_cmd *cmd)
694 {
695 struct iwl_rx_packet *pkt = rxb_addr(rxb);
696
697 priv->last_phy_res_valid = true;
698 memcpy(&priv->last_phy_res, pkt->u.raw,
699 sizeof(struct iwl_rx_phy_res));
700 return 0;
701 }
702
703 /*
704 * returns non-zero if packet should be dropped
705 */
706 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
707 struct ieee80211_hdr *hdr,
708 u32 decrypt_res,
709 struct ieee80211_rx_status *stats)
710 {
711 u16 fc = le16_to_cpu(hdr->frame_control);
712
713 /*
714 * All contexts have the same setting here due to it being
715 * a module parameter, so OK to check any context.
716 */
717 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
718 RXON_FILTER_DIS_DECRYPT_MSK)
719 return 0;
720
721 if (!(fc & IEEE80211_FCTL_PROTECTED))
722 return 0;
723
724 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
725 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
726 case RX_RES_STATUS_SEC_TYPE_TKIP:
727 /* The uCode has got a bad phase 1 Key, pushes the packet.
728 * Decryption will be done in SW. */
729 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
730 RX_RES_STATUS_BAD_KEY_TTAK)
731 break;
732
733 case RX_RES_STATUS_SEC_TYPE_WEP:
734 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
735 RX_RES_STATUS_BAD_ICV_MIC) {
736 /* bad ICV, the packet is destroyed since the
737 * decryption is inplace, drop it */
738 IWL_DEBUG_RX(priv, "Packet destroyed\n");
739 return -1;
740 }
741 case RX_RES_STATUS_SEC_TYPE_CCMP:
742 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
743 RX_RES_STATUS_DECRYPT_OK) {
744 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
745 stats->flag |= RX_FLAG_DECRYPTED;
746 }
747 break;
748
749 default:
750 break;
751 }
752 return 0;
753 }
754
755 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
756 struct ieee80211_hdr *hdr,
757 u16 len,
758 u32 ampdu_status,
759 struct iwl_rx_mem_buffer *rxb,
760 struct ieee80211_rx_status *stats)
761 {
762 struct sk_buff *skb;
763 __le16 fc = hdr->frame_control;
764 struct iwl_rxon_context *ctx;
765
766 /* We only process data packets if the interface is open */
767 if (unlikely(!priv->is_open)) {
768 IWL_DEBUG_DROP_LIMIT(priv,
769 "Dropping packet while interface is not open.\n");
770 return;
771 }
772
773 /* In case of HW accelerated crypto and bad decryption, drop */
774 if (!iwlagn_mod_params.sw_crypto &&
775 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
776 return;
777
778 skb = dev_alloc_skb(128);
779 if (!skb) {
780 IWL_ERR(priv, "dev_alloc_skb failed\n");
781 return;
782 }
783
784 skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
785
786 iwl_update_stats(priv, false, fc, len);
787
788 /*
789 * Wake any queues that were stopped due to a passive channel tx
790 * failure. This can happen because the regulatory enforcement in
791 * the device waits for a beacon before allowing transmission,
792 * sometimes even after already having transmitted frames for the
793 * association because the new RXON may reset the information.
794 */
795 if (unlikely(ieee80211_is_beacon(fc))) {
796 for_each_context(priv, ctx) {
797 if (!ctx->last_tx_rejected)
798 continue;
799 if (compare_ether_addr(hdr->addr3,
800 ctx->active.bssid_addr))
801 continue;
802 ctx->last_tx_rejected = false;
803 iwl_trans_wake_any_queue(trans(priv), ctx->ctxid);
804 }
805 }
806
807 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
808
809 ieee80211_rx(priv->hw, skb);
810 rxb->page = NULL;
811 }
812
813 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
814 {
815 u32 decrypt_out = 0;
816
817 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
818 RX_RES_STATUS_STATION_FOUND)
819 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
820 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
821
822 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
823
824 /* packet was not encrypted */
825 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
826 RX_RES_STATUS_SEC_TYPE_NONE)
827 return decrypt_out;
828
829 /* packet was encrypted with unknown alg */
830 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
831 RX_RES_STATUS_SEC_TYPE_ERR)
832 return decrypt_out;
833
834 /* decryption was not done in HW */
835 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
836 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
837 return decrypt_out;
838
839 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
840
841 case RX_RES_STATUS_SEC_TYPE_CCMP:
842 /* alg is CCM: check MIC only */
843 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
844 /* Bad MIC */
845 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
846 else
847 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
848
849 break;
850
851 case RX_RES_STATUS_SEC_TYPE_TKIP:
852 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
853 /* Bad TTAK */
854 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
855 break;
856 }
857 /* fall through if TTAK OK */
858 default:
859 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
860 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
861 else
862 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
863 break;
864 }
865
866 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
867 decrypt_in, decrypt_out);
868
869 return decrypt_out;
870 }
871
872 /* Calc max signal level (dBm) among 3 possible receivers */
873 static int iwlagn_calc_rssi(struct iwl_priv *priv,
874 struct iwl_rx_phy_res *rx_resp)
875 {
876 /* data from PHY/DSP regarding signal strength, etc.,
877 * contents are always there, not configurable by host
878 */
879 struct iwlagn_non_cfg_phy *ncphy =
880 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
881 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
882 u8 agc;
883
884 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
885 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
886
887 /* Find max rssi among 3 possible receivers.
888 * These values are measured by the digital signal processor (DSP).
889 * They should stay fairly constant even as the signal strength varies,
890 * if the radio's automatic gain control (AGC) is working right.
891 * AGC value (see below) will provide the "interesting" info.
892 */
893 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
894 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
895 IWLAGN_OFDM_RSSI_A_BIT_POS;
896 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
897 IWLAGN_OFDM_RSSI_B_BIT_POS;
898 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
899 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
900 IWLAGN_OFDM_RSSI_C_BIT_POS;
901
902 max_rssi = max_t(u32, rssi_a, rssi_b);
903 max_rssi = max_t(u32, max_rssi, rssi_c);
904
905 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
906 rssi_a, rssi_b, rssi_c, max_rssi, agc);
907
908 /* dBm = max_rssi dB - agc dB - constant.
909 * Higher AGC (higher radio gain) means lower signal. */
910 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
911 }
912
913 /* Called for REPLY_RX (legacy ABG frames), or
914 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
915 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
916 struct iwl_rx_mem_buffer *rxb,
917 struct iwl_device_cmd *cmd)
918 {
919 struct ieee80211_hdr *header;
920 struct ieee80211_rx_status rx_status;
921 struct iwl_rx_packet *pkt = rxb_addr(rxb);
922 struct iwl_rx_phy_res *phy_res;
923 __le32 rx_pkt_status;
924 struct iwl_rx_mpdu_res_start *amsdu;
925 u32 len;
926 u32 ampdu_status;
927 u32 rate_n_flags;
928
929 /**
930 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
931 * REPLY_RX: physical layer info is in this buffer
932 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
933 * command and cached in priv->last_phy_res
934 *
935 * Here we set up local variables depending on which command is
936 * received.
937 */
938 if (pkt->hdr.cmd == REPLY_RX) {
939 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
940 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
941 + phy_res->cfg_phy_cnt);
942
943 len = le16_to_cpu(phy_res->byte_count);
944 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
945 phy_res->cfg_phy_cnt + len);
946 ampdu_status = le32_to_cpu(rx_pkt_status);
947 } else {
948 if (!priv->last_phy_res_valid) {
949 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
950 return 0;
951 }
952 phy_res = &priv->last_phy_res;
953 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
954 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
955 len = le16_to_cpu(amsdu->byte_count);
956 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
957 ampdu_status = iwlagn_translate_rx_status(priv,
958 le32_to_cpu(rx_pkt_status));
959 }
960
961 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
962 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
963 phy_res->cfg_phy_cnt);
964 return 0;
965 }
966
967 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
968 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
969 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
970 le32_to_cpu(rx_pkt_status));
971 return 0;
972 }
973
974 /* This will be used in several places later */
975 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
976
977 /* rx_status carries information about the packet to mac80211 */
978 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
979 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
980 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
981 rx_status.freq =
982 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
983 rx_status.band);
984 rx_status.rate_idx =
985 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
986 rx_status.flag = 0;
987
988 /* TSF isn't reliable. In order to allow smooth user experience,
989 * this W/A doesn't propagate it to the mac80211 */
990 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
991
992 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
993
994 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
995 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
996
997 iwl_dbg_log_rx_data_frame(priv, len, header);
998 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
999 rx_status.signal, (unsigned long long)rx_status.mactime);
1000
1001 /*
1002 * "antenna number"
1003 *
1004 * It seems that the antenna field in the phy flags value
1005 * is actually a bit field. This is undefined by radiotap,
1006 * it wants an actual antenna number but I always get "7"
1007 * for most legacy frames I receive indicating that the
1008 * same frame was received on all three RX chains.
1009 *
1010 * I think this field should be removed in favor of a
1011 * new 802.11n radiotap field "RX chains" that is defined
1012 * as a bitmask.
1013 */
1014 rx_status.antenna =
1015 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
1016 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
1017
1018 /* set the preamble flag if appropriate */
1019 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
1020 rx_status.flag |= RX_FLAG_SHORTPRE;
1021
1022 /* Set up the HT phy flags */
1023 if (rate_n_flags & RATE_MCS_HT_MSK)
1024 rx_status.flag |= RX_FLAG_HT;
1025 if (rate_n_flags & RATE_MCS_HT40_MSK)
1026 rx_status.flag |= RX_FLAG_40MHZ;
1027 if (rate_n_flags & RATE_MCS_SGI_MSK)
1028 rx_status.flag |= RX_FLAG_SHORT_GI;
1029
1030 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1031 rxb, &rx_status);
1032 return 0;
1033 }
1034
1035 /**
1036 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1037 *
1038 * Setup the RX handlers for each of the reply types sent from the uCode
1039 * to the host.
1040 */
1041 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1042 {
1043 int (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
1044 struct iwl_device_cmd *cmd);
1045
1046 handlers = priv->rx_handlers;
1047
1048 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1049 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1050 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1051 iwlagn_rx_spectrum_measure_notif;
1052 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1053 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1054 iwlagn_rx_pm_debug_statistics_notif;
1055 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1056 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1057
1058 /*
1059 * The same handler is used for both the REPLY to a discrete
1060 * statistics request from the host as well as for the periodic
1061 * statistics notifications (after received beacons) from the uCode.
1062 */
1063 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1064 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1065
1066 iwl_setup_rx_scan_handlers(priv);
1067
1068 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1069 handlers[MISSED_BEACONS_NOTIFICATION] =
1070 iwlagn_rx_missed_beacon_notif;
1071
1072 /* Rx handlers */
1073 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1074 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1075
1076 /* block ack */
1077 handlers[REPLY_COMPRESSED_BA] =
1078 iwlagn_rx_reply_compressed_ba;
1079
1080 /* init calibration handlers */
1081 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
1082 iwlagn_rx_calib_result;
1083 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1084
1085 /* set up notification wait support */
1086 spin_lock_init(&priv->notif_wait_lock);
1087 INIT_LIST_HEAD(&priv->notif_waits);
1088 init_waitqueue_head(&priv->notif_waitq);
1089
1090 /* Set up BT Rx handlers */
1091 if (priv->cfg->lib->bt_rx_handler_setup)
1092 priv->cfg->lib->bt_rx_handler_setup(priv);
1093
1094 }
1095
1096 int iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
1097 struct iwl_device_cmd *cmd)
1098 {
1099 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1100 int err = 0;
1101
1102 /*
1103 * Do the notification wait before RX handlers so
1104 * even if the RX handler consumes the RXB we have
1105 * access to it in the notification wait entry.
1106 */
1107 if (!list_empty(&priv->notif_waits)) {
1108 struct iwl_notification_wait *w;
1109
1110 spin_lock(&priv->notif_wait_lock);
1111 list_for_each_entry(w, &priv->notif_waits, list) {
1112 if (w->cmd != pkt->hdr.cmd)
1113 continue;
1114 IWL_DEBUG_RX(priv,
1115 "Notif: %s, 0x%02x - wake the callers up\n",
1116 get_cmd_string(pkt->hdr.cmd),
1117 pkt->hdr.cmd);
1118 w->triggered = true;
1119 if (w->fn)
1120 w->fn(priv, pkt, w->fn_data);
1121 }
1122 spin_unlock(&priv->notif_wait_lock);
1123
1124 wake_up_all(&priv->notif_waitq);
1125 }
1126
1127 if (priv->pre_rx_handler)
1128 priv->pre_rx_handler(priv, rxb);
1129
1130 /* Based on type of command response or notification,
1131 * handle those that need handling via function in
1132 * rx_handlers table. See iwl_setup_rx_handlers() */
1133 if (priv->rx_handlers[pkt->hdr.cmd]) {
1134 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1135 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1136 } else {
1137 /* No handling needed */
1138 IWL_DEBUG_RX(priv,
1139 "No handler needed for %s, 0x%02x\n",
1140 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1141 }
1142 return err;
1143 }
Linux kernel - Deliverables
This page took 0.230396 seconds and 5 git commands to generate.