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a55360e4 TW |
1 | /****************************************************************************** |
2 | * | |
901069c7 | 3 | * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. |
a55360e4 TW |
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: | |
759ef89f | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
a55360e4 TW |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
27 | * | |
28 | *****************************************************************************/ | |
29 | ||
1781a07f | 30 | #include <linux/etherdevice.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
118253ca | 32 | #include <linux/sched.h> |
a55360e4 | 33 | #include <net/mac80211.h> |
a05ffd39 | 34 | #include <asm/unaligned.h> |
a55360e4 TW |
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" | |
67289941 | 41 | #include "iwl-agn-calib.h" |
466a19a0 SG |
42 | #include "iwl-agn.h" |
43 | ||
a55360e4 | 44 | |
466a19a0 SG |
45 | /****************************************************************************** |
46 | * | |
47 | * Generic RX handler implementations | |
48 | * | |
49 | ******************************************************************************/ | |
50 | ||
466a19a0 SG |
51 | static void iwl_rx_reply_error(struct iwl_priv *priv, |
52 | struct iwl_rx_mem_buffer *rxb) | |
53 | { | |
54 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
55 | ||
56 | IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) " | |
57 | "seq 0x%04X ser 0x%08X\n", | |
58 | le32_to_cpu(pkt->u.err_resp.error_type), | |
59 | get_cmd_string(pkt->u.err_resp.cmd_id), | |
60 | pkt->u.err_resp.cmd_id, | |
61 | le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), | |
62 | le32_to_cpu(pkt->u.err_resp.error_info)); | |
63 | } | |
64 | ||
65 | static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) | |
66 | { | |
67 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
68 | struct iwl_csa_notification *csa = &(pkt->u.csa_notif); | |
69 | /* | |
70 | * MULTI-FIXME | |
71 | * See iwl_mac_channel_switch. | |
72 | */ | |
73 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
74 | struct iwl_rxon_cmd *rxon = (void *)&ctx->active; | |
75 | ||
6f213ff1 SG |
76 | if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) |
77 | return; | |
78 | ||
79 | if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) { | |
80 | rxon->channel = csa->channel; | |
81 | ctx->staging.channel = csa->channel; | |
82 | IWL_DEBUG_11H(priv, "CSA notif: channel %d\n", | |
466a19a0 | 83 | le16_to_cpu(csa->channel)); |
6f213ff1 SG |
84 | iwl_chswitch_done(priv, true); |
85 | } else { | |
86 | IWL_ERR(priv, "CSA notif (fail) : channel %d\n", | |
87 | le16_to_cpu(csa->channel)); | |
88 | iwl_chswitch_done(priv, false); | |
466a19a0 SG |
89 | } |
90 | } | |
91 | ||
92 | ||
93 | static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, | |
81963d68 RC |
94 | struct iwl_rx_mem_buffer *rxb) |
95 | { | |
96 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
97 | struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif); | |
98 | ||
99 | if (!report->state) { | |
100 | IWL_DEBUG_11H(priv, | |
101 | "Spectrum Measure Notification: Start\n"); | |
102 | return; | |
103 | } | |
104 | ||
105 | memcpy(&priv->measure_report, report, sizeof(*report)); | |
106 | priv->measurement_status |= MEASUREMENT_READY; | |
107 | } | |
81963d68 | 108 | |
466a19a0 SG |
109 | static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv, |
110 | struct iwl_rx_mem_buffer *rxb) | |
111 | { | |
112 | #ifdef CONFIG_IWLWIFI_DEBUG | |
113 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
114 | struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif); | |
115 | IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n", | |
116 | sleep->pm_sleep_mode, sleep->pm_wakeup_src); | |
117 | #endif | |
118 | } | |
119 | ||
120 | static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv, | |
121 | struct iwl_rx_mem_buffer *rxb) | |
122 | { | |
123 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
124 | u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; | |
125 | IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled " | |
126 | "notification for %s:\n", len, | |
127 | get_cmd_string(pkt->hdr.cmd)); | |
128 | iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len); | |
129 | } | |
130 | ||
131 | static void iwl_rx_beacon_notif(struct iwl_priv *priv, | |
132 | struct iwl_rx_mem_buffer *rxb) | |
133 | { | |
134 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
135 | struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw; | |
136 | #ifdef CONFIG_IWLWIFI_DEBUG | |
137 | u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status); | |
138 | u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); | |
139 | ||
140 | IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d " | |
141 | "tsf:0x%.8x%.8x rate:%d\n", | |
142 | status & TX_STATUS_MSK, | |
143 | beacon->beacon_notify_hdr.failure_frame, | |
144 | le32_to_cpu(beacon->ibss_mgr_status), | |
145 | le32_to_cpu(beacon->high_tsf), | |
146 | le32_to_cpu(beacon->low_tsf), rate); | |
147 | #endif | |
148 | ||
149 | priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); | |
150 | ||
151 | if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
152 | queue_work(priv->workqueue, &priv->beacon_update); | |
153 | } | |
154 | ||
ad6e82a5 SG |
155 | /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */ |
156 | #define ACK_CNT_RATIO (50) | |
157 | #define BA_TIMEOUT_CNT (5) | |
158 | #define BA_TIMEOUT_MAX (16) | |
159 | ||
160 | /** | |
161 | * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries. | |
162 | * | |
163 | * When the ACK count ratio is low and aggregated BA timeout retries exceeding | |
164 | * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal | |
165 | * operation state. | |
166 | */ | |
0da0e5bf JB |
167 | static bool iwl_good_ack_health(struct iwl_priv *priv, |
168 | struct statistics_tx *cur) | |
ad6e82a5 SG |
169 | { |
170 | int actual_delta, expected_delta, ba_timeout_delta; | |
0da0e5bf | 171 | struct statistics_tx *old; |
ad6e82a5 | 172 | |
898ed67b | 173 | if (priv->agg_tids_count) |
ad6e82a5 SG |
174 | return true; |
175 | ||
0da0e5bf | 176 | old = &priv->statistics.tx; |
ad6e82a5 SG |
177 | |
178 | actual_delta = le32_to_cpu(cur->actual_ack_cnt) - | |
179 | le32_to_cpu(old->actual_ack_cnt); | |
180 | expected_delta = le32_to_cpu(cur->expected_ack_cnt) - | |
181 | le32_to_cpu(old->expected_ack_cnt); | |
182 | ||
183 | /* Values should not be negative, but we do not trust the firmware */ | |
184 | if (actual_delta <= 0 || expected_delta <= 0) | |
185 | return true; | |
186 | ||
187 | ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) - | |
188 | le32_to_cpu(old->agg.ba_timeout); | |
189 | ||
190 | if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO && | |
191 | ba_timeout_delta > BA_TIMEOUT_CNT) { | |
192 | IWL_DEBUG_RADIO(priv, "deltas: actual %d expected %d ba_timeout %d\n", | |
193 | actual_delta, expected_delta, ba_timeout_delta); | |
194 | ||
195 | #ifdef CONFIG_IWLWIFI_DEBUGFS | |
196 | /* | |
197 | * This is ifdef'ed on DEBUGFS because otherwise the | |
198 | * statistics aren't available. If DEBUGFS is set but | |
199 | * DEBUG is not, these will just compile out. | |
200 | */ | |
201 | IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n", | |
0da0e5bf | 202 | priv->delta_stats.tx.rx_detected_cnt); |
ad6e82a5 SG |
203 | IWL_DEBUG_RADIO(priv, |
204 | "ack_or_ba_timeout_collision delta %d\n", | |
0da0e5bf | 205 | priv->delta_stats.tx.ack_or_ba_timeout_collision); |
ad6e82a5 SG |
206 | #endif |
207 | ||
208 | if (ba_timeout_delta >= BA_TIMEOUT_MAX) | |
209 | return false; | |
210 | } | |
211 | ||
212 | return true; | |
213 | } | |
214 | ||
215 | /** | |
216 | * iwl_good_plcp_health - checks for plcp error. | |
217 | * | |
218 | * When the plcp error is exceeding the thresholds, reset the radio | |
219 | * to improve the throughput. | |
220 | */ | |
466a19a0 | 221 | static bool iwl_good_plcp_health(struct iwl_priv *priv, |
0da0e5bf JB |
222 | struct statistics_rx_phy *cur_ofdm, |
223 | struct statistics_rx_ht_phy *cur_ofdm_ht, | |
224 | unsigned int msecs) | |
ad6e82a5 | 225 | { |
6198c387 SG |
226 | int delta; |
227 | int threshold = priv->cfg->base_params->plcp_delta_threshold; | |
ad6e82a5 | 228 | |
6198c387 | 229 | if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) { |
ad6e82a5 | 230 | IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n"); |
6198c387 | 231 | return true; |
ad6e82a5 SG |
232 | } |
233 | ||
0da0e5bf JB |
234 | delta = le32_to_cpu(cur_ofdm->plcp_err) - |
235 | le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) + | |
236 | le32_to_cpu(cur_ofdm_ht->plcp_err) - | |
237 | le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err); | |
6198c387 | 238 | |
0da0e5bf | 239 | /* Can be negative if firmware reset statistics */ |
6198c387 SG |
240 | if (delta <= 0) |
241 | return true; | |
242 | ||
243 | if ((delta * 100 / msecs) > threshold) { | |
244 | IWL_DEBUG_RADIO(priv, | |
245 | "plcp health threshold %u delta %d msecs %u\n", | |
246 | threshold, delta, msecs); | |
247 | return false; | |
248 | } | |
249 | ||
250 | return true; | |
ad6e82a5 SG |
251 | } |
252 | ||
466a19a0 | 253 | static void iwl_recover_from_statistics(struct iwl_priv *priv, |
0da0e5bf JB |
254 | struct statistics_rx_phy *cur_ofdm, |
255 | struct statistics_rx_ht_phy *cur_ofdm_ht, | |
256 | struct statistics_tx *tx, | |
257 | unsigned long stamp) | |
fa8f130c | 258 | { |
410f2bb3 | 259 | unsigned int msecs; |
b7977ffa | 260 | |
410f2bb3 SG |
261 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
262 | return; | |
263 | ||
410f2bb3 SG |
264 | msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies); |
265 | ||
266 | /* Only gather statistics and update time stamp when not associated */ | |
267 | if (!iwl_is_any_associated(priv)) | |
0da0e5bf | 268 | return; |
410f2bb3 SG |
269 | |
270 | /* Do not check/recover when do not have enough statistics data */ | |
271 | if (msecs < 99) | |
fa8f130c | 272 | return; |
ca3d9389 | 273 | |
9d143e9a | 274 | if (iwlagn_mod_params.ack_check && !iwl_good_ack_health(priv, tx)) { |
ca3d9389 SG |
275 | IWL_ERR(priv, "low ack count detected, restart firmware\n"); |
276 | if (!iwl_force_reset(priv, IWL_FW_RESET, false)) | |
277 | return; | |
3e4fb5fa | 278 | } |
ca3d9389 | 279 | |
9d143e9a | 280 | if (iwlagn_mod_params.plcp_check && |
0da0e5bf | 281 | !iwl_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs)) |
ca3d9389 | 282 | iwl_force_reset(priv, IWL_RF_RESET, false); |
beac5498 | 283 | } |
beac5498 | 284 | |
67289941 SG |
285 | /* Calculate noise level, based on measurements during network silence just |
286 | * before arriving beacon. This measurement can be done only if we know | |
287 | * exactly when to expect beacons, therefore only when we're associated. */ | |
288 | static void iwl_rx_calc_noise(struct iwl_priv *priv) | |
289 | { | |
290 | struct statistics_rx_non_phy *rx_info; | |
291 | int num_active_rx = 0; | |
292 | int total_silence = 0; | |
293 | int bcn_silence_a, bcn_silence_b, bcn_silence_c; | |
294 | int last_rx_noise; | |
295 | ||
0da0e5bf JB |
296 | rx_info = &priv->statistics.rx_non_phy; |
297 | ||
67289941 SG |
298 | bcn_silence_a = |
299 | le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; | |
300 | bcn_silence_b = | |
301 | le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; | |
302 | bcn_silence_c = | |
303 | le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; | |
304 | ||
305 | if (bcn_silence_a) { | |
306 | total_silence += bcn_silence_a; | |
307 | num_active_rx++; | |
308 | } | |
309 | if (bcn_silence_b) { | |
310 | total_silence += bcn_silence_b; | |
311 | num_active_rx++; | |
312 | } | |
313 | if (bcn_silence_c) { | |
314 | total_silence += bcn_silence_c; | |
315 | num_active_rx++; | |
316 | } | |
317 | ||
318 | /* Average among active antennas */ | |
319 | if (num_active_rx) | |
320 | last_rx_noise = (total_silence / num_active_rx) - 107; | |
321 | else | |
322 | last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; | |
323 | ||
324 | IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n", | |
325 | bcn_silence_a, bcn_silence_b, bcn_silence_c, | |
326 | last_rx_noise); | |
327 | } | |
328 | ||
0da0e5bf | 329 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
67289941 SG |
330 | /* |
331 | * based on the assumption of all statistics counter are in DWORD | |
332 | * FIXME: This function is for debugging, do not deal with | |
333 | * the case of counters roll-over. | |
334 | */ | |
0da0e5bf JB |
335 | static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta, |
336 | __le32 *max_delta, __le32 *accum, int size) | |
67289941 | 337 | { |
0da0e5bf JB |
338 | int i; |
339 | ||
340 | for (i = 0; | |
341 | i < size / sizeof(__le32); | |
342 | i++, prev++, cur++, delta++, max_delta++, accum++) { | |
343 | if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) { | |
344 | *delta = cpu_to_le32( | |
345 | le32_to_cpu(*cur) - le32_to_cpu(*prev)); | |
346 | le32_add_cpu(accum, le32_to_cpu(*delta)); | |
347 | if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta)) | |
67289941 SG |
348 | *max_delta = *delta; |
349 | } | |
350 | } | |
0da0e5bf | 351 | } |
67289941 | 352 | |
0da0e5bf JB |
353 | static void |
354 | iwl_accumulative_statistics(struct iwl_priv *priv, | |
355 | struct statistics_general_common *common, | |
356 | struct statistics_rx_non_phy *rx_non_phy, | |
357 | struct statistics_rx_phy *rx_ofdm, | |
358 | struct statistics_rx_ht_phy *rx_ofdm_ht, | |
359 | struct statistics_rx_phy *rx_cck, | |
360 | struct statistics_tx *tx, | |
361 | struct statistics_bt_activity *bt_activity) | |
362 | { | |
363 | #define ACCUM(_name) \ | |
364 | accum_stats((__le32 *)&priv->statistics._name, \ | |
365 | (__le32 *)_name, \ | |
366 | (__le32 *)&priv->delta_stats._name, \ | |
367 | (__le32 *)&priv->max_delta_stats._name, \ | |
368 | (__le32 *)&priv->accum_stats._name, \ | |
369 | sizeof(*_name)); | |
370 | ||
371 | ACCUM(common); | |
372 | ACCUM(rx_non_phy); | |
373 | ACCUM(rx_ofdm); | |
374 | ACCUM(rx_ofdm_ht); | |
375 | ACCUM(rx_cck); | |
376 | ACCUM(tx); | |
377 | if (bt_activity) | |
378 | ACCUM(bt_activity); | |
379 | #undef ACCUM | |
466a19a0 | 380 | } |
0da0e5bf JB |
381 | #else |
382 | static inline void | |
383 | iwl_accumulative_statistics(struct iwl_priv *priv, | |
384 | struct statistics_general_common *common, | |
385 | struct statistics_rx_non_phy *rx_non_phy, | |
386 | struct statistics_rx_phy *rx_ofdm, | |
387 | struct statistics_rx_ht_phy *rx_ofdm_ht, | |
388 | struct statistics_rx_phy *rx_cck, | |
389 | struct statistics_tx *tx, | |
390 | struct statistics_bt_activity *bt_activity) | |
391 | { | |
392 | } | |
393 | #endif | |
67289941 | 394 | |
466a19a0 | 395 | static void iwl_rx_statistics(struct iwl_priv *priv, |
67289941 SG |
396 | struct iwl_rx_mem_buffer *rxb) |
397 | { | |
0da0e5bf | 398 | unsigned long stamp = jiffies; |
466a19a0 | 399 | const int reg_recalib_period = 60; |
67289941 SG |
400 | int change; |
401 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
0da0e5bf JB |
402 | u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; |
403 | __le32 *flag; | |
404 | struct statistics_general_common *common; | |
405 | struct statistics_rx_non_phy *rx_non_phy; | |
406 | struct statistics_rx_phy *rx_ofdm; | |
407 | struct statistics_rx_ht_phy *rx_ofdm_ht; | |
408 | struct statistics_rx_phy *rx_cck; | |
409 | struct statistics_tx *tx; | |
410 | struct statistics_bt_activity *bt_activity; | |
411 | ||
412 | len -= sizeof(struct iwl_cmd_header); /* skip header */ | |
413 | ||
414 | IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n", | |
415 | len); | |
416 | ||
417 | if (len == sizeof(struct iwl_bt_notif_statistics)) { | |
418 | struct iwl_bt_notif_statistics *stats; | |
419 | stats = &pkt->u.stats_bt; | |
420 | flag = &stats->flag; | |
421 | common = &stats->general.common; | |
422 | rx_non_phy = &stats->rx.general.common; | |
423 | rx_ofdm = &stats->rx.ofdm; | |
424 | rx_ofdm_ht = &stats->rx.ofdm_ht; | |
425 | rx_cck = &stats->rx.cck; | |
426 | tx = &stats->tx; | |
427 | bt_activity = &stats->general.activity; | |
67289941 | 428 | |
0da0e5bf JB |
429 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
430 | /* handle this exception directly */ | |
431 | priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills; | |
432 | le32_add_cpu(&priv->statistics.accum_num_bt_kills, | |
433 | le32_to_cpu(stats->rx.general.num_bt_kills)); | |
434 | #endif | |
435 | } else if (len == sizeof(struct iwl_notif_statistics)) { | |
436 | struct iwl_notif_statistics *stats; | |
437 | stats = &pkt->u.stats; | |
438 | flag = &stats->flag; | |
439 | common = &stats->general.common; | |
440 | rx_non_phy = &stats->rx.general; | |
441 | rx_ofdm = &stats->rx.ofdm; | |
442 | rx_ofdm_ht = &stats->rx.ofdm_ht; | |
443 | rx_cck = &stats->rx.cck; | |
444 | tx = &stats->tx; | |
445 | bt_activity = NULL; | |
67289941 | 446 | } else { |
0da0e5bf JB |
447 | WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n", |
448 | len, sizeof(struct iwl_bt_notif_statistics), | |
449 | sizeof(struct iwl_notif_statistics)); | |
450 | return; | |
67289941 SG |
451 | } |
452 | ||
0da0e5bf JB |
453 | change = common->temperature != priv->statistics.common.temperature || |
454 | (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) != | |
455 | (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK); | |
456 | ||
457 | iwl_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm, | |
458 | rx_ofdm_ht, rx_cck, tx, bt_activity); | |
459 | ||
460 | iwl_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp); | |
461 | ||
462 | priv->statistics.flag = *flag; | |
463 | memcpy(&priv->statistics.common, common, sizeof(*common)); | |
464 | memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy)); | |
465 | memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm)); | |
466 | memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht)); | |
467 | memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck)); | |
468 | memcpy(&priv->statistics.tx, tx, sizeof(*tx)); | |
469 | #ifdef CONFIG_IWLWIFI_DEBUGFS | |
470 | if (bt_activity) | |
471 | memcpy(&priv->statistics.bt_activity, bt_activity, | |
472 | sizeof(*bt_activity)); | |
473 | #endif | |
474 | ||
475 | priv->rx_statistics_jiffies = stamp; | |
67289941 | 476 | |
67289941 SG |
477 | set_bit(STATUS_STATISTICS, &priv->status); |
478 | ||
479 | /* Reschedule the statistics timer to occur in | |
466a19a0 | 480 | * reg_recalib_period seconds to ensure we get a |
67289941 SG |
481 | * thermal update even if the uCode doesn't give |
482 | * us one */ | |
483 | mod_timer(&priv->statistics_periodic, jiffies + | |
466a19a0 | 484 | msecs_to_jiffies(reg_recalib_period * 1000)); |
67289941 SG |
485 | |
486 | if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && | |
487 | (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { | |
488 | iwl_rx_calc_noise(priv); | |
489 | queue_work(priv->workqueue, &priv->run_time_calib_work); | |
490 | } | |
90c300cb WYG |
491 | if (priv->cfg->lib->temperature && change) |
492 | priv->cfg->lib->temperature(priv); | |
67289941 SG |
493 | } |
494 | ||
466a19a0 SG |
495 | static void iwl_rx_reply_statistics(struct iwl_priv *priv, |
496 | struct iwl_rx_mem_buffer *rxb) | |
67289941 SG |
497 | { |
498 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
499 | ||
500 | if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) { | |
501 | #ifdef CONFIG_IWLWIFI_DEBUGFS | |
0da0e5bf JB |
502 | memset(&priv->accum_stats, 0, |
503 | sizeof(priv->accum_stats)); | |
504 | memset(&priv->delta_stats, 0, | |
505 | sizeof(priv->delta_stats)); | |
506 | memset(&priv->max_delta_stats, 0, | |
507 | sizeof(priv->max_delta_stats)); | |
67289941 SG |
508 | #endif |
509 | IWL_DEBUG_RX(priv, "Statistics have been cleared\n"); | |
510 | } | |
511 | iwl_rx_statistics(priv, rxb); | |
512 | } | |
513 | ||
466a19a0 SG |
514 | /* Handle notification from uCode that card's power state is changing |
515 | * due to software, hardware, or critical temperature RFKILL */ | |
516 | static void iwl_rx_card_state_notif(struct iwl_priv *priv, | |
517 | struct iwl_rx_mem_buffer *rxb) | |
518 | { | |
519 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
520 | u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); | |
521 | unsigned long status = priv->status; | |
522 | ||
523 | IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n", | |
524 | (flags & HW_CARD_DISABLED) ? "Kill" : "On", | |
525 | (flags & SW_CARD_DISABLED) ? "Kill" : "On", | |
526 | (flags & CT_CARD_DISABLED) ? | |
527 | "Reached" : "Not reached"); | |
528 | ||
529 | if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | | |
530 | CT_CARD_DISABLED)) { | |
531 | ||
532 | iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, | |
533 | CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); | |
534 | ||
535 | iwl_write_direct32(priv, HBUS_TARG_MBX_C, | |
536 | HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); | |
537 | ||
538 | if (!(flags & RXON_CARD_DISABLED)) { | |
539 | iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, | |
540 | CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); | |
541 | iwl_write_direct32(priv, HBUS_TARG_MBX_C, | |
542 | HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); | |
543 | } | |
544 | if (flags & CT_CARD_DISABLED) | |
545 | iwl_tt_enter_ct_kill(priv); | |
546 | } | |
547 | if (!(flags & CT_CARD_DISABLED)) | |
548 | iwl_tt_exit_ct_kill(priv); | |
549 | ||
550 | if (flags & HW_CARD_DISABLED) | |
551 | set_bit(STATUS_RF_KILL_HW, &priv->status); | |
552 | else | |
553 | clear_bit(STATUS_RF_KILL_HW, &priv->status); | |
554 | ||
555 | ||
556 | if (!(flags & RXON_CARD_DISABLED)) | |
557 | iwl_scan_cancel(priv); | |
558 | ||
559 | if ((test_bit(STATUS_RF_KILL_HW, &status) != | |
560 | test_bit(STATUS_RF_KILL_HW, &priv->status))) | |
561 | wiphy_rfkill_set_hw_state(priv->hw->wiphy, | |
562 | test_bit(STATUS_RF_KILL_HW, &priv->status)); | |
563 | else | |
564 | wake_up_interruptible(&priv->wait_command_queue); | |
565 | } | |
566 | ||
567 | static void iwl_rx_missed_beacon_notif(struct iwl_priv *priv, | |
568 | struct iwl_rx_mem_buffer *rxb) | |
67289941 SG |
569 | |
570 | { | |
571 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
572 | struct iwl_missed_beacon_notif *missed_beacon; | |
573 | ||
574 | missed_beacon = &pkt->u.missed_beacon; | |
575 | if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > | |
576 | priv->missed_beacon_threshold) { | |
577 | IWL_DEBUG_CALIB(priv, | |
578 | "missed bcn cnsq %d totl %d rcd %d expctd %d\n", | |
579 | le32_to_cpu(missed_beacon->consecutive_missed_beacons), | |
580 | le32_to_cpu(missed_beacon->total_missed_becons), | |
581 | le32_to_cpu(missed_beacon->num_recvd_beacons), | |
582 | le32_to_cpu(missed_beacon->num_expected_beacons)); | |
583 | if (!test_bit(STATUS_SCANNING, &priv->status)) | |
584 | iwl_init_sensitivity(priv); | |
585 | } | |
586 | } | |
587 | ||
466a19a0 SG |
588 | /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). |
589 | * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ | |
590 | static void iwl_rx_reply_rx_phy(struct iwl_priv *priv, | |
591 | struct iwl_rx_mem_buffer *rxb) | |
592 | { | |
593 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
594 | ||
898ed67b WYG |
595 | priv->last_phy_res_valid = true; |
596 | memcpy(&priv->last_phy_res, pkt->u.raw, | |
466a19a0 SG |
597 | sizeof(struct iwl_rx_phy_res)); |
598 | } | |
599 | ||
1781a07f EG |
600 | /* |
601 | * returns non-zero if packet should be dropped | |
602 | */ | |
466a19a0 SG |
603 | static int iwl_set_decrypted_flag(struct iwl_priv *priv, |
604 | struct ieee80211_hdr *hdr, | |
605 | u32 decrypt_res, | |
606 | struct ieee80211_rx_status *stats) | |
1781a07f EG |
607 | { |
608 | u16 fc = le16_to_cpu(hdr->frame_control); | |
609 | ||
246ed355 JB |
610 | /* |
611 | * All contexts have the same setting here due to it being | |
612 | * a module parameter, so OK to check any context. | |
613 | */ | |
614 | if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags & | |
615 | RXON_FILTER_DIS_DECRYPT_MSK) | |
1781a07f EG |
616 | return 0; |
617 | ||
618 | if (!(fc & IEEE80211_FCTL_PROTECTED)) | |
619 | return 0; | |
620 | ||
e1623446 | 621 | IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res); |
1781a07f EG |
622 | switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { |
623 | case RX_RES_STATUS_SEC_TYPE_TKIP: | |
624 | /* The uCode has got a bad phase 1 Key, pushes the packet. | |
625 | * Decryption will be done in SW. */ | |
626 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == | |
627 | RX_RES_STATUS_BAD_KEY_TTAK) | |
628 | break; | |
629 | ||
630 | case RX_RES_STATUS_SEC_TYPE_WEP: | |
631 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == | |
632 | RX_RES_STATUS_BAD_ICV_MIC) { | |
633 | /* bad ICV, the packet is destroyed since the | |
634 | * decryption is inplace, drop it */ | |
e1623446 | 635 | IWL_DEBUG_RX(priv, "Packet destroyed\n"); |
1781a07f EG |
636 | return -1; |
637 | } | |
638 | case RX_RES_STATUS_SEC_TYPE_CCMP: | |
639 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == | |
640 | RX_RES_STATUS_DECRYPT_OK) { | |
e1623446 | 641 | IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n"); |
1781a07f EG |
642 | stats->flag |= RX_FLAG_DECRYPTED; |
643 | } | |
644 | break; | |
645 | ||
646 | default: | |
647 | break; | |
648 | } | |
649 | return 0; | |
650 | } | |
466a19a0 SG |
651 | |
652 | static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, | |
653 | struct ieee80211_hdr *hdr, | |
654 | u16 len, | |
655 | u32 ampdu_status, | |
656 | struct iwl_rx_mem_buffer *rxb, | |
657 | struct ieee80211_rx_status *stats) | |
658 | { | |
659 | struct sk_buff *skb; | |
660 | __le16 fc = hdr->frame_control; | |
68b99311 | 661 | struct iwl_rxon_context *ctx; |
466a19a0 SG |
662 | |
663 | /* We only process data packets if the interface is open */ | |
664 | if (unlikely(!priv->is_open)) { | |
665 | IWL_DEBUG_DROP_LIMIT(priv, | |
666 | "Dropping packet while interface is not open.\n"); | |
667 | return; | |
668 | } | |
669 | ||
670 | /* In case of HW accelerated crypto and bad decryption, drop */ | |
9d143e9a | 671 | if (!iwlagn_mod_params.sw_crypto && |
466a19a0 SG |
672 | iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) |
673 | return; | |
674 | ||
675 | skb = dev_alloc_skb(128); | |
676 | if (!skb) { | |
677 | IWL_ERR(priv, "dev_alloc_skb failed\n"); | |
678 | return; | |
679 | } | |
680 | ||
681 | skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len); | |
682 | ||
683 | iwl_update_stats(priv, false, fc, len); | |
68b99311 GT |
684 | |
685 | /* | |
686 | * Wake any queues that were stopped due to a passive channel tx | |
687 | * failure. This can happen because the regulatory enforcement in | |
688 | * the device waits for a beacon before allowing transmission, | |
689 | * sometimes even after already having transmitted frames for the | |
690 | * association because the new RXON may reset the information. | |
691 | */ | |
692 | if (unlikely(ieee80211_is_beacon(fc))) { | |
693 | for_each_context(priv, ctx) { | |
694 | if (!ctx->last_tx_rejected) | |
695 | continue; | |
696 | if (compare_ether_addr(hdr->addr3, | |
697 | ctx->active.bssid_addr)) | |
698 | continue; | |
699 | ctx->last_tx_rejected = false; | |
700 | iwl_wake_any_queue(priv, ctx); | |
701 | } | |
702 | } | |
703 | ||
466a19a0 SG |
704 | memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); |
705 | ||
706 | ieee80211_rx(priv->hw, skb); | |
466a19a0 SG |
707 | rxb->page = NULL; |
708 | } | |
709 | ||
710 | static u32 iwl_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) | |
711 | { | |
712 | u32 decrypt_out = 0; | |
713 | ||
714 | if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == | |
715 | RX_RES_STATUS_STATION_FOUND) | |
716 | decrypt_out |= (RX_RES_STATUS_STATION_FOUND | | |
717 | RX_RES_STATUS_NO_STATION_INFO_MISMATCH); | |
718 | ||
719 | decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); | |
720 | ||
721 | /* packet was not encrypted */ | |
722 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == | |
723 | RX_RES_STATUS_SEC_TYPE_NONE) | |
724 | return decrypt_out; | |
725 | ||
726 | /* packet was encrypted with unknown alg */ | |
727 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == | |
728 | RX_RES_STATUS_SEC_TYPE_ERR) | |
729 | return decrypt_out; | |
730 | ||
731 | /* decryption was not done in HW */ | |
732 | if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != | |
733 | RX_MPDU_RES_STATUS_DEC_DONE_MSK) | |
734 | return decrypt_out; | |
735 | ||
736 | switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { | |
737 | ||
738 | case RX_RES_STATUS_SEC_TYPE_CCMP: | |
739 | /* alg is CCM: check MIC only */ | |
740 | if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) | |
741 | /* Bad MIC */ | |
742 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; | |
743 | else | |
744 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; | |
745 | ||
746 | break; | |
747 | ||
748 | case RX_RES_STATUS_SEC_TYPE_TKIP: | |
749 | if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { | |
750 | /* Bad TTAK */ | |
751 | decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; | |
752 | break; | |
753 | } | |
754 | /* fall through if TTAK OK */ | |
755 | default: | |
756 | if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) | |
757 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; | |
758 | else | |
759 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; | |
760 | break; | |
761 | } | |
762 | ||
763 | IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n", | |
764 | decrypt_in, decrypt_out); | |
765 | ||
766 | return decrypt_out; | |
767 | } | |
768 | ||
5c3d29fc DF |
769 | /* Calc max signal level (dBm) among 3 possible receivers */ |
770 | static int iwlagn_calc_rssi(struct iwl_priv *priv, | |
771 | struct iwl_rx_phy_res *rx_resp) | |
772 | { | |
773 | /* data from PHY/DSP regarding signal strength, etc., | |
774 | * contents are always there, not configurable by host | |
775 | */ | |
776 | struct iwlagn_non_cfg_phy *ncphy = | |
777 | (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf; | |
778 | u32 val, rssi_a, rssi_b, rssi_c, max_rssi; | |
779 | u8 agc; | |
780 | ||
781 | val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]); | |
782 | agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS; | |
783 | ||
784 | /* Find max rssi among 3 possible receivers. | |
785 | * These values are measured by the digital signal processor (DSP). | |
786 | * They should stay fairly constant even as the signal strength varies, | |
787 | * if the radio's automatic gain control (AGC) is working right. | |
788 | * AGC value (see below) will provide the "interesting" info. | |
789 | */ | |
790 | val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]); | |
791 | rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >> | |
792 | IWLAGN_OFDM_RSSI_A_BIT_POS; | |
793 | rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >> | |
794 | IWLAGN_OFDM_RSSI_B_BIT_POS; | |
795 | val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]); | |
796 | rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >> | |
797 | IWLAGN_OFDM_RSSI_C_BIT_POS; | |
798 | ||
799 | max_rssi = max_t(u32, rssi_a, rssi_b); | |
800 | max_rssi = max_t(u32, max_rssi, rssi_c); | |
801 | ||
802 | IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n", | |
803 | rssi_a, rssi_b, rssi_c, max_rssi, agc); | |
804 | ||
805 | /* dBm = max_rssi dB - agc dB - constant. | |
806 | * Higher AGC (higher radio gain) means lower signal. */ | |
807 | return max_rssi - agc - IWLAGN_RSSI_OFFSET; | |
808 | } | |
809 | ||
466a19a0 SG |
810 | /* Called for REPLY_RX (legacy ABG frames), or |
811 | * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ | |
812 | static void iwl_rx_reply_rx(struct iwl_priv *priv, | |
813 | struct iwl_rx_mem_buffer *rxb) | |
814 | { | |
815 | struct ieee80211_hdr *header; | |
816 | struct ieee80211_rx_status rx_status; | |
817 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
818 | struct iwl_rx_phy_res *phy_res; | |
819 | __le32 rx_pkt_status; | |
820 | struct iwl_rx_mpdu_res_start *amsdu; | |
821 | u32 len; | |
822 | u32 ampdu_status; | |
823 | u32 rate_n_flags; | |
824 | ||
825 | /** | |
826 | * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently. | |
827 | * REPLY_RX: physical layer info is in this buffer | |
828 | * REPLY_RX_MPDU_CMD: physical layer info was sent in separate | |
829 | * command and cached in priv->last_phy_res | |
830 | * | |
831 | * Here we set up local variables depending on which command is | |
832 | * received. | |
833 | */ | |
834 | if (pkt->hdr.cmd == REPLY_RX) { | |
835 | phy_res = (struct iwl_rx_phy_res *)pkt->u.raw; | |
836 | header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) | |
837 | + phy_res->cfg_phy_cnt); | |
838 | ||
839 | len = le16_to_cpu(phy_res->byte_count); | |
840 | rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) + | |
841 | phy_res->cfg_phy_cnt + len); | |
842 | ampdu_status = le32_to_cpu(rx_pkt_status); | |
843 | } else { | |
898ed67b | 844 | if (!priv->last_phy_res_valid) { |
466a19a0 SG |
845 | IWL_ERR(priv, "MPDU frame without cached PHY data\n"); |
846 | return; | |
847 | } | |
898ed67b | 848 | phy_res = &priv->last_phy_res; |
466a19a0 SG |
849 | amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw; |
850 | header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); | |
851 | len = le16_to_cpu(amsdu->byte_count); | |
852 | rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len); | |
853 | ampdu_status = iwl_translate_rx_status(priv, | |
854 | le32_to_cpu(rx_pkt_status)); | |
855 | } | |
856 | ||
857 | if ((unlikely(phy_res->cfg_phy_cnt > 20))) { | |
858 | IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n", | |
859 | phy_res->cfg_phy_cnt); | |
860 | return; | |
861 | } | |
862 | ||
863 | if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || | |
864 | !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { | |
865 | IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", | |
866 | le32_to_cpu(rx_pkt_status)); | |
867 | return; | |
868 | } | |
869 | ||
870 | /* This will be used in several places later */ | |
871 | rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); | |
872 | ||
873 | /* rx_status carries information about the packet to mac80211 */ | |
874 | rx_status.mactime = le64_to_cpu(phy_res->timestamp); | |
875 | rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? | |
876 | IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
877 | rx_status.freq = | |
878 | ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), | |
879 | rx_status.band); | |
880 | rx_status.rate_idx = | |
881 | iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); | |
882 | rx_status.flag = 0; | |
883 | ||
884 | /* TSF isn't reliable. In order to allow smooth user experience, | |
885 | * this W/A doesn't propagate it to the mac80211 */ | |
886 | /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/ | |
887 | ||
888 | priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); | |
889 | ||
890 | /* Find max signal strength (dBm) among 3 antenna/receiver chains */ | |
5c3d29fc | 891 | rx_status.signal = iwlagn_calc_rssi(priv, phy_res); |
466a19a0 SG |
892 | |
893 | iwl_dbg_log_rx_data_frame(priv, len, header); | |
894 | IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n", | |
895 | rx_status.signal, (unsigned long long)rx_status.mactime); | |
896 | ||
897 | /* | |
898 | * "antenna number" | |
899 | * | |
900 | * It seems that the antenna field in the phy flags value | |
901 | * is actually a bit field. This is undefined by radiotap, | |
902 | * it wants an actual antenna number but I always get "7" | |
903 | * for most legacy frames I receive indicating that the | |
904 | * same frame was received on all three RX chains. | |
905 | * | |
906 | * I think this field should be removed in favor of a | |
907 | * new 802.11n radiotap field "RX chains" that is defined | |
908 | * as a bitmask. | |
909 | */ | |
910 | rx_status.antenna = | |
911 | (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) | |
912 | >> RX_RES_PHY_FLAGS_ANTENNA_POS; | |
913 | ||
914 | /* set the preamble flag if appropriate */ | |
915 | if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) | |
916 | rx_status.flag |= RX_FLAG_SHORTPRE; | |
917 | ||
918 | /* Set up the HT phy flags */ | |
919 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
920 | rx_status.flag |= RX_FLAG_HT; | |
921 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
922 | rx_status.flag |= RX_FLAG_40MHZ; | |
923 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
924 | rx_status.flag |= RX_FLAG_SHORT_GI; | |
925 | ||
926 | iwl_pass_packet_to_mac80211(priv, header, len, ampdu_status, | |
927 | rxb, &rx_status); | |
928 | } | |
929 | ||
930 | /** | |
931 | * iwl_setup_rx_handlers - Initialize Rx handler callbacks | |
932 | * | |
933 | * Setup the RX handlers for each of the reply types sent from the uCode | |
934 | * to the host. | |
935 | */ | |
936 | void iwl_setup_rx_handlers(struct iwl_priv *priv) | |
937 | { | |
938 | void (**handlers)(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb); | |
939 | ||
940 | handlers = priv->rx_handlers; | |
941 | ||
466a19a0 SG |
942 | handlers[REPLY_ERROR] = iwl_rx_reply_error; |
943 | handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa; | |
944 | handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif; | |
945 | handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif; | |
946 | handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl_rx_pm_debug_statistics_notif; | |
947 | handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif; | |
948 | ||
949 | /* | |
950 | * The same handler is used for both the REPLY to a discrete | |
951 | * statistics request from the host as well as for the periodic | |
952 | * statistics notifications (after received beacons) from the uCode. | |
953 | */ | |
954 | handlers[REPLY_STATISTICS_CMD] = iwl_rx_reply_statistics; | |
955 | handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics; | |
956 | ||
957 | iwl_setup_rx_scan_handlers(priv); | |
958 | ||
959 | handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif; | |
960 | handlers[MISSED_BEACONS_NOTIFICATION] = iwl_rx_missed_beacon_notif; | |
961 | ||
962 | /* Rx handlers */ | |
963 | handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy; | |
964 | handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx; | |
965 | ||
966 | /* block ack */ | |
967 | handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba; | |
968 | ||
8d301193 EG |
969 | /* init calibration handlers */ |
970 | priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] = | |
971 | iwlagn_rx_calib_result; | |
972 | priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx; | |
973 | ||
974 | /* set up notification wait support */ | |
898ed67b WYG |
975 | spin_lock_init(&priv->notif_wait_lock); |
976 | INIT_LIST_HEAD(&priv->notif_waits); | |
977 | init_waitqueue_head(&priv->notif_waitq); | |
8d301193 EG |
978 | |
979 | /* Set up BT Rx handlers */ | |
980 | if (priv->cfg->lib->bt_rx_handler_setup) | |
981 | priv->cfg->lib->bt_rx_handler_setup(priv); | |
982 | ||
466a19a0 | 983 | } |
1ab9f6c1 EG |
984 | |
985 | void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) | |
986 | { | |
987 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
988 | ||
989 | /* | |
990 | * Do the notification wait before RX handlers so | |
991 | * even if the RX handler consumes the RXB we have | |
992 | * access to it in the notification wait entry. | |
993 | */ | |
898ed67b | 994 | if (!list_empty(&priv->notif_waits)) { |
1ab9f6c1 EG |
995 | struct iwl_notification_wait *w; |
996 | ||
898ed67b WYG |
997 | spin_lock(&priv->notif_wait_lock); |
998 | list_for_each_entry(w, &priv->notif_waits, list) { | |
1ab9f6c1 EG |
999 | if (w->cmd != pkt->hdr.cmd) |
1000 | continue; | |
1001 | IWL_DEBUG_RX(priv, | |
1002 | "Notif: %s, 0x%02x - wake the callers up\n", | |
1003 | get_cmd_string(pkt->hdr.cmd), | |
1004 | pkt->hdr.cmd); | |
1005 | w->triggered = true; | |
1006 | if (w->fn) | |
1007 | w->fn(priv, pkt, w->fn_data); | |
1008 | } | |
898ed67b | 1009 | spin_unlock(&priv->notif_wait_lock); |
1ab9f6c1 | 1010 | |
898ed67b | 1011 | wake_up_all(&priv->notif_waitq); |
1ab9f6c1 EG |
1012 | } |
1013 | ||
1014 | if (priv->pre_rx_handler) | |
1015 | priv->pre_rx_handler(priv, rxb); | |
1016 | ||
1017 | /* Based on type of command response or notification, | |
1018 | * handle those that need handling via function in | |
1019 | * rx_handlers table. See iwl_setup_rx_handlers() */ | |
1020 | if (priv->rx_handlers[pkt->hdr.cmd]) { | |
1021 | priv->isr_stats.rx_handlers[pkt->hdr.cmd]++; | |
1022 | priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); | |
1023 | } else { | |
1024 | /* No handling needed */ | |
1025 | IWL_DEBUG_RX(priv, | |
1026 | "No handler needed for %s, 0x%02x\n", | |
1027 | get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); | |
1028 | } | |
1029 | } |