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iwlwifi: deprecate "iwl4965" alias support
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-core.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
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 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <net/mac80211.h>
34
35 #include "iwl-eeprom.h"
36 #include "iwl-dev.h" /* FIXME: remove */
37 #include "iwl-debug.h"
38 #include "iwl-core.h"
39 #include "iwl-io.h"
40 #include "iwl-power.h"
41 #include "iwl-sta.h"
42 #include "iwl-helpers.h"
43
44
45 MODULE_DESCRIPTION("iwl core");
46 MODULE_VERSION(IWLWIFI_VERSION);
47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
48 MODULE_LICENSE("GPL");
49
50 /*
51 * set bt_coex_active to true, uCode will do kill/defer
52 * every time the priority line is asserted (BT is sending signals on the
53 * priority line in the PCIx).
54 * set bt_coex_active to false, uCode will ignore the BT activity and
55 * perform the normal operation
56 *
57 * User might experience transmit issue on some platform due to WiFi/BT
58 * co-exist problem. The possible behaviors are:
59 * Able to scan and finding all the available AP
60 * Not able to associate with any AP
61 * On those platforms, WiFi communication can be restored by set
62 * "bt_coex_active" module parameter to "false"
63 *
64 * default: bt_coex_active = true (BT_COEX_ENABLE)
65 */
66 static bool bt_coex_active = true;
67 module_param(bt_coex_active, bool, S_IRUGO);
68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
69
70 static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
71 {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
72 0, COEX_UNASSOC_IDLE_FLAGS},
73 {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
74 0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
75 {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
76 0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
77 {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
78 0, COEX_CALIBRATION_FLAGS},
79 {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
80 0, COEX_PERIODIC_CALIBRATION_FLAGS},
81 {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
82 0, COEX_CONNECTION_ESTAB_FLAGS},
83 {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
84 0, COEX_ASSOCIATED_IDLE_FLAGS},
85 {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
86 0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
87 {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
88 0, COEX_ASSOC_AUTO_SCAN_FLAGS},
89 {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
90 0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
91 {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
92 {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
93 {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
94 0, COEX_STAND_ALONE_DEBUG_FLAGS},
95 {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
96 0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
97 {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
98 {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
99 };
100
101 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
102 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
103 IWL_RATE_SISO_##s##M_PLCP, \
104 IWL_RATE_MIMO2_##s##M_PLCP,\
105 IWL_RATE_MIMO3_##s##M_PLCP,\
106 IWL_RATE_##r##M_IEEE, \
107 IWL_RATE_##ip##M_INDEX, \
108 IWL_RATE_##in##M_INDEX, \
109 IWL_RATE_##rp##M_INDEX, \
110 IWL_RATE_##rn##M_INDEX, \
111 IWL_RATE_##pp##M_INDEX, \
112 IWL_RATE_##np##M_INDEX }
113
114 u32 iwl_debug_level;
115 EXPORT_SYMBOL(iwl_debug_level);
116
117 /*
118 * Parameter order:
119 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
120 *
121 * If there isn't a valid next or previous rate then INV is used which
122 * maps to IWL_RATE_INVALID
123 *
124 */
125 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
126 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
127 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
128 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
129 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
130 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
131 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
132 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
133 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
134 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
135 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
136 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
137 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
138 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
139 /* FIXME:RS: ^^ should be INV (legacy) */
140 };
141 EXPORT_SYMBOL(iwl_rates);
142
143 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
144 {
145 int idx = 0;
146
147 /* HT rate format */
148 if (rate_n_flags & RATE_MCS_HT_MSK) {
149 idx = (rate_n_flags & 0xff);
150
151 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
152 idx = idx - IWL_RATE_MIMO3_6M_PLCP;
153 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
154 idx = idx - IWL_RATE_MIMO2_6M_PLCP;
155
156 idx += IWL_FIRST_OFDM_RATE;
157 /* skip 9M not supported in ht*/
158 if (idx >= IWL_RATE_9M_INDEX)
159 idx += 1;
160 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
161 return idx;
162
163 /* legacy rate format, search for match in table */
164 } else {
165 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
166 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
167 return idx;
168 }
169
170 return -1;
171 }
172 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
173
174 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
175 {
176 int i;
177 u8 ind = ant;
178 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
179 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
180 if (priv->hw_params.valid_tx_ant & BIT(ind))
181 return ind;
182 }
183 return ant;
184 }
185 EXPORT_SYMBOL(iwl_toggle_tx_ant);
186
187 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
188 EXPORT_SYMBOL(iwl_bcast_addr);
189
190
191 /* This function both allocates and initializes hw and priv. */
192 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
193 struct ieee80211_ops *hw_ops)
194 {
195 struct iwl_priv *priv;
196
197 /* mac80211 allocates memory for this device instance, including
198 * space for this driver's private structure */
199 struct ieee80211_hw *hw =
200 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
201 if (hw == NULL) {
202 printk(KERN_ERR "%s: Can not allocate network device\n",
203 cfg->name);
204 goto out;
205 }
206
207 priv = hw->priv;
208 priv->hw = hw;
209
210 out:
211 return hw;
212 }
213 EXPORT_SYMBOL(iwl_alloc_all);
214
215 void iwl_hw_detect(struct iwl_priv *priv)
216 {
217 priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
218 priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
219 pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
220 }
221 EXPORT_SYMBOL(iwl_hw_detect);
222
223 /*
224 * QoS support
225 */
226 static void iwl_update_qos(struct iwl_priv *priv)
227 {
228 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
229 return;
230
231 priv->qos_data.def_qos_parm.qos_flags = 0;
232
233 if (priv->qos_data.qos_active)
234 priv->qos_data.def_qos_parm.qos_flags |=
235 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
236
237 if (priv->current_ht_config.is_ht)
238 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
239
240 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
241 priv->qos_data.qos_active,
242 priv->qos_data.def_qos_parm.qos_flags);
243
244 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
245 sizeof(struct iwl_qosparam_cmd),
246 &priv->qos_data.def_qos_parm, NULL);
247 }
248
249 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
250 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
251 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
252 struct ieee80211_sta_ht_cap *ht_info,
253 enum ieee80211_band band)
254 {
255 u16 max_bit_rate = 0;
256 u8 rx_chains_num = priv->hw_params.rx_chains_num;
257 u8 tx_chains_num = priv->hw_params.tx_chains_num;
258
259 ht_info->cap = 0;
260 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
261
262 ht_info->ht_supported = true;
263
264 if (priv->cfg->ht_greenfield_support)
265 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
266 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
267 max_bit_rate = MAX_BIT_RATE_20_MHZ;
268 if (priv->hw_params.ht40_channel & BIT(band)) {
269 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
270 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
271 ht_info->mcs.rx_mask[4] = 0x01;
272 max_bit_rate = MAX_BIT_RATE_40_MHZ;
273 }
274
275 if (priv->cfg->mod_params->amsdu_size_8K)
276 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
277
278 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
279 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
280
281 ht_info->mcs.rx_mask[0] = 0xFF;
282 if (rx_chains_num >= 2)
283 ht_info->mcs.rx_mask[1] = 0xFF;
284 if (rx_chains_num >= 3)
285 ht_info->mcs.rx_mask[2] = 0xFF;
286
287 /* Highest supported Rx data rate */
288 max_bit_rate *= rx_chains_num;
289 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
290 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
291
292 /* Tx MCS capabilities */
293 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
294 if (tx_chains_num != rx_chains_num) {
295 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
296 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
297 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
298 }
299 }
300
301 /**
302 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
303 */
304 int iwlcore_init_geos(struct iwl_priv *priv)
305 {
306 struct iwl_channel_info *ch;
307 struct ieee80211_supported_band *sband;
308 struct ieee80211_channel *channels;
309 struct ieee80211_channel *geo_ch;
310 struct ieee80211_rate *rates;
311 int i = 0;
312
313 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
314 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
315 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
316 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
317 return 0;
318 }
319
320 channels = kzalloc(sizeof(struct ieee80211_channel) *
321 priv->channel_count, GFP_KERNEL);
322 if (!channels)
323 return -ENOMEM;
324
325 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
326 GFP_KERNEL);
327 if (!rates) {
328 kfree(channels);
329 return -ENOMEM;
330 }
331
332 /* 5.2GHz channels start after the 2.4GHz channels */
333 sband = &priv->bands[IEEE80211_BAND_5GHZ];
334 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
335 /* just OFDM */
336 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
337 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
338
339 if (priv->cfg->sku & IWL_SKU_N)
340 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
341 IEEE80211_BAND_5GHZ);
342
343 sband = &priv->bands[IEEE80211_BAND_2GHZ];
344 sband->channels = channels;
345 /* OFDM & CCK */
346 sband->bitrates = rates;
347 sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
348
349 if (priv->cfg->sku & IWL_SKU_N)
350 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
351 IEEE80211_BAND_2GHZ);
352
353 priv->ieee_channels = channels;
354 priv->ieee_rates = rates;
355
356 for (i = 0; i < priv->channel_count; i++) {
357 ch = &priv->channel_info[i];
358
359 /* FIXME: might be removed if scan is OK */
360 if (!is_channel_valid(ch))
361 continue;
362
363 if (is_channel_a_band(ch))
364 sband = &priv->bands[IEEE80211_BAND_5GHZ];
365 else
366 sband = &priv->bands[IEEE80211_BAND_2GHZ];
367
368 geo_ch = &sband->channels[sband->n_channels++];
369
370 geo_ch->center_freq =
371 ieee80211_channel_to_frequency(ch->channel);
372 geo_ch->max_power = ch->max_power_avg;
373 geo_ch->max_antenna_gain = 0xff;
374 geo_ch->hw_value = ch->channel;
375
376 if (is_channel_valid(ch)) {
377 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
378 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
379
380 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
381 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
382
383 if (ch->flags & EEPROM_CHANNEL_RADAR)
384 geo_ch->flags |= IEEE80211_CHAN_RADAR;
385
386 geo_ch->flags |= ch->ht40_extension_channel;
387
388 if (ch->max_power_avg > priv->tx_power_device_lmt)
389 priv->tx_power_device_lmt = ch->max_power_avg;
390 } else {
391 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
392 }
393
394 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
395 ch->channel, geo_ch->center_freq,
396 is_channel_a_band(ch) ? "5.2" : "2.4",
397 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
398 "restricted" : "valid",
399 geo_ch->flags);
400 }
401
402 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
403 priv->cfg->sku & IWL_SKU_A) {
404 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
405 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
406 priv->pci_dev->device,
407 priv->pci_dev->subsystem_device);
408 priv->cfg->sku &= ~IWL_SKU_A;
409 }
410
411 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
412 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
413 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
414
415 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
416
417 return 0;
418 }
419 EXPORT_SYMBOL(iwlcore_init_geos);
420
421 /*
422 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
423 */
424 void iwlcore_free_geos(struct iwl_priv *priv)
425 {
426 kfree(priv->ieee_channels);
427 kfree(priv->ieee_rates);
428 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
429 }
430 EXPORT_SYMBOL(iwlcore_free_geos);
431
432 /*
433 * iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
434 * function.
435 */
436 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
437 __le32 *tx_flags)
438 {
439 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
440 *tx_flags |= TX_CMD_FLG_RTS_MSK;
441 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
442 } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
443 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
444 *tx_flags |= TX_CMD_FLG_CTS_MSK;
445 }
446 }
447 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
448
449 static bool is_single_rx_stream(struct iwl_priv *priv)
450 {
451 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
452 priv->current_ht_config.single_chain_sufficient;
453 }
454
455 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
456 enum ieee80211_band band,
457 u16 channel, u8 extension_chan_offset)
458 {
459 const struct iwl_channel_info *ch_info;
460
461 ch_info = iwl_get_channel_info(priv, band, channel);
462 if (!is_channel_valid(ch_info))
463 return 0;
464
465 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
466 return !(ch_info->ht40_extension_channel &
467 IEEE80211_CHAN_NO_HT40PLUS);
468 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
469 return !(ch_info->ht40_extension_channel &
470 IEEE80211_CHAN_NO_HT40MINUS);
471
472 return 0;
473 }
474
475 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
476 struct ieee80211_sta_ht_cap *sta_ht_inf)
477 {
478 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
479
480 if (!ht_conf->is_ht || !ht_conf->is_40mhz)
481 return 0;
482
483 /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
484 * the bit will not set if it is pure 40MHz case
485 */
486 if (sta_ht_inf) {
487 if (!sta_ht_inf->ht_supported)
488 return 0;
489 }
490 #ifdef CONFIG_IWLWIFI_DEBUG
491 if (priv->disable_ht40)
492 return 0;
493 #endif
494 return iwl_is_channel_extension(priv, priv->band,
495 le16_to_cpu(priv->staging_rxon.channel),
496 ht_conf->extension_chan_offset);
497 }
498 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
499
500 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
501 {
502 u16 new_val = 0;
503 u16 beacon_factor = 0;
504
505 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
506 new_val = beacon_val / beacon_factor;
507
508 if (!new_val)
509 new_val = max_beacon_val;
510
511 return new_val;
512 }
513
514 void iwl_setup_rxon_timing(struct iwl_priv *priv)
515 {
516 u64 tsf;
517 s32 interval_tm, rem;
518 unsigned long flags;
519 struct ieee80211_conf *conf = NULL;
520 u16 beacon_int;
521
522 conf = ieee80211_get_hw_conf(priv->hw);
523
524 spin_lock_irqsave(&priv->lock, flags);
525 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
526 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
527
528 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
529 beacon_int = priv->beacon_int;
530 priv->rxon_timing.atim_window = 0;
531 } else {
532 beacon_int = priv->vif->bss_conf.beacon_int;
533
534 /* TODO: we need to get atim_window from upper stack
535 * for now we set to 0 */
536 priv->rxon_timing.atim_window = 0;
537 }
538
539 beacon_int = iwl_adjust_beacon_interval(beacon_int,
540 priv->hw_params.max_beacon_itrvl * 1024);
541 priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
542
543 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
544 interval_tm = beacon_int * 1024;
545 rem = do_div(tsf, interval_tm);
546 priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
547
548 spin_unlock_irqrestore(&priv->lock, flags);
549 IWL_DEBUG_ASSOC(priv,
550 "beacon interval %d beacon timer %d beacon tim %d\n",
551 le16_to_cpu(priv->rxon_timing.beacon_interval),
552 le32_to_cpu(priv->rxon_timing.beacon_init_val),
553 le16_to_cpu(priv->rxon_timing.atim_window));
554 }
555 EXPORT_SYMBOL(iwl_setup_rxon_timing);
556
557 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
558 {
559 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
560
561 if (hw_decrypt)
562 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
563 else
564 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
565
566 }
567 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
568
569 /**
570 * iwl_check_rxon_cmd - validate RXON structure is valid
571 *
572 * NOTE: This is really only useful during development and can eventually
573 * be #ifdef'd out once the driver is stable and folks aren't actively
574 * making changes
575 */
576 int iwl_check_rxon_cmd(struct iwl_priv *priv)
577 {
578 int error = 0;
579 int counter = 1;
580 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
581
582 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
583 error |= le32_to_cpu(rxon->flags &
584 (RXON_FLG_TGJ_NARROW_BAND_MSK |
585 RXON_FLG_RADAR_DETECT_MSK));
586 if (error)
587 IWL_WARN(priv, "check 24G fields %d | %d\n",
588 counter++, error);
589 } else {
590 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
591 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
592 if (error)
593 IWL_WARN(priv, "check 52 fields %d | %d\n",
594 counter++, error);
595 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
596 if (error)
597 IWL_WARN(priv, "check 52 CCK %d | %d\n",
598 counter++, error);
599 }
600 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
601 if (error)
602 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
603
604 /* make sure basic rates 6Mbps and 1Mbps are supported */
605 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
606 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
607 if (error)
608 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
609
610 error |= (le16_to_cpu(rxon->assoc_id) > 2007);
611 if (error)
612 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
613
614 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
615 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
616 if (error)
617 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
618 counter++, error);
619
620 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
621 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
622 if (error)
623 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
624 counter++, error);
625
626 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
627 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
628 if (error)
629 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
630 counter++, error);
631
632 if (error)
633 IWL_WARN(priv, "Tuning to channel %d\n",
634 le16_to_cpu(rxon->channel));
635
636 if (error) {
637 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
638 return -1;
639 }
640 return 0;
641 }
642 EXPORT_SYMBOL(iwl_check_rxon_cmd);
643
644 /**
645 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
646 * @priv: staging_rxon is compared to active_rxon
647 *
648 * If the RXON structure is changing enough to require a new tune,
649 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
650 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
651 */
652 int iwl_full_rxon_required(struct iwl_priv *priv)
653 {
654
655 /* These items are only settable from the full RXON command */
656 if (!(iwl_is_associated(priv)) ||
657 compare_ether_addr(priv->staging_rxon.bssid_addr,
658 priv->active_rxon.bssid_addr) ||
659 compare_ether_addr(priv->staging_rxon.node_addr,
660 priv->active_rxon.node_addr) ||
661 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
662 priv->active_rxon.wlap_bssid_addr) ||
663 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
664 (priv->staging_rxon.channel != priv->active_rxon.channel) ||
665 (priv->staging_rxon.air_propagation !=
666 priv->active_rxon.air_propagation) ||
667 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
668 priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
669 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
670 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
671 (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
672 priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
673 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
674 return 1;
675
676 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
677 * be updated with the RXON_ASSOC command -- however only some
678 * flag transitions are allowed using RXON_ASSOC */
679
680 /* Check if we are not switching bands */
681 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
682 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
683 return 1;
684
685 /* Check if we are switching association toggle */
686 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
687 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
688 return 1;
689
690 return 0;
691 }
692 EXPORT_SYMBOL(iwl_full_rxon_required);
693
694 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
695 {
696 /*
697 * Assign the lowest rate -- should really get this from
698 * the beacon skb from mac80211.
699 */
700 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
701 return IWL_RATE_1M_PLCP;
702 else
703 return IWL_RATE_6M_PLCP;
704 }
705 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
706
707 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
708 {
709 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
710
711 if (!ht_conf->is_ht) {
712 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
713 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
714 RXON_FLG_HT40_PROT_MSK |
715 RXON_FLG_HT_PROT_MSK);
716 return;
717 }
718
719 /* FIXME: if the definition of ht_protection changed, the "translation"
720 * will be needed for rxon->flags
721 */
722 rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
723
724 /* Set up channel bandwidth:
725 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
726 /* clear the HT channel mode before set the mode */
727 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
728 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
729 if (iwl_is_ht40_tx_allowed(priv, NULL)) {
730 /* pure ht40 */
731 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
732 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
733 /* Note: control channel is opposite of extension channel */
734 switch (ht_conf->extension_chan_offset) {
735 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
736 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
737 break;
738 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
739 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
740 break;
741 }
742 } else {
743 /* Note: control channel is opposite of extension channel */
744 switch (ht_conf->extension_chan_offset) {
745 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
746 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
747 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
748 break;
749 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
750 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
751 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
752 break;
753 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
754 default:
755 /* channel location only valid if in Mixed mode */
756 IWL_ERR(priv, "invalid extension channel offset\n");
757 break;
758 }
759 }
760 } else {
761 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
762 }
763
764 if (priv->cfg->ops->hcmd->set_rxon_chain)
765 priv->cfg->ops->hcmd->set_rxon_chain(priv);
766
767 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
768 "extension channel offset 0x%x\n",
769 le32_to_cpu(rxon->flags), ht_conf->ht_protection,
770 ht_conf->extension_chan_offset);
771 return;
772 }
773 EXPORT_SYMBOL(iwl_set_rxon_ht);
774
775 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
776 #define IWL_NUM_RX_CHAINS_SINGLE 2
777 #define IWL_NUM_IDLE_CHAINS_DUAL 2
778 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
779
780 /*
781 * Determine how many receiver/antenna chains to use.
782 *
783 * More provides better reception via diversity. Fewer saves power
784 * at the expense of throughput, but only when not in powersave to
785 * start with.
786 *
787 * MIMO (dual stream) requires at least 2, but works better with 3.
788 * This does not determine *which* chains to use, just how many.
789 */
790 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
791 {
792 /* # of Rx chains to use when expecting MIMO. */
793 if (is_single_rx_stream(priv))
794 return IWL_NUM_RX_CHAINS_SINGLE;
795 else
796 return IWL_NUM_RX_CHAINS_MULTIPLE;
797 }
798
799 /*
800 * When we are in power saving mode, unless device support spatial
801 * multiplexing power save, use the active count for rx chain count.
802 */
803 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
804 {
805 /* # Rx chains when idling, depending on SMPS mode */
806 switch (priv->current_ht_config.smps) {
807 case IEEE80211_SMPS_STATIC:
808 case IEEE80211_SMPS_DYNAMIC:
809 return IWL_NUM_IDLE_CHAINS_SINGLE;
810 case IEEE80211_SMPS_OFF:
811 return active_cnt;
812 default:
813 WARN(1, "invalid SMPS mode %d",
814 priv->current_ht_config.smps);
815 return active_cnt;
816 }
817 }
818
819 /* up to 4 chains */
820 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
821 {
822 u8 res;
823 res = (chain_bitmap & BIT(0)) >> 0;
824 res += (chain_bitmap & BIT(1)) >> 1;
825 res += (chain_bitmap & BIT(2)) >> 2;
826 res += (chain_bitmap & BIT(3)) >> 3;
827 return res;
828 }
829
830 /**
831 * iwl_is_monitor_mode - Determine if interface in monitor mode
832 *
833 * priv->iw_mode is set in add_interface, but add_interface is
834 * never called for monitor mode. The only way mac80211 informs us about
835 * monitor mode is through configuring filters (call to configure_filter).
836 */
837 bool iwl_is_monitor_mode(struct iwl_priv *priv)
838 {
839 return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
840 }
841 EXPORT_SYMBOL(iwl_is_monitor_mode);
842
843 /**
844 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
845 *
846 * Selects how many and which Rx receivers/antennas/chains to use.
847 * This should not be used for scan command ... it puts data in wrong place.
848 */
849 void iwl_set_rxon_chain(struct iwl_priv *priv)
850 {
851 bool is_single = is_single_rx_stream(priv);
852 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
853 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
854 u32 active_chains;
855 u16 rx_chain;
856
857 /* Tell uCode which antennas are actually connected.
858 * Before first association, we assume all antennas are connected.
859 * Just after first association, iwl_chain_noise_calibration()
860 * checks which antennas actually *are* connected. */
861 if (priv->chain_noise_data.active_chains)
862 active_chains = priv->chain_noise_data.active_chains;
863 else
864 active_chains = priv->hw_params.valid_rx_ant;
865
866 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
867
868 /* How many receivers should we use? */
869 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
870 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
871
872
873 /* correct rx chain count according hw settings
874 * and chain noise calibration
875 */
876 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
877 if (valid_rx_cnt < active_rx_cnt)
878 active_rx_cnt = valid_rx_cnt;
879
880 if (valid_rx_cnt < idle_rx_cnt)
881 idle_rx_cnt = valid_rx_cnt;
882
883 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
884 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
885
886 /* copied from 'iwl_bg_request_scan()' */
887 /* Force use of chains B and C (0x6) for Rx
888 * Avoid A (0x1) for the device has off-channel reception on A-band.
889 * MIMO is not used here, but value is required */
890 if (iwl_is_monitor_mode(priv) &&
891 !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
892 priv->cfg->off_channel_workaround) {
893 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
894 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
895 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
896 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
897 }
898
899 priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
900
901 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
902 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
903 else
904 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
905
906 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
907 priv->staging_rxon.rx_chain,
908 active_rx_cnt, idle_rx_cnt);
909
910 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
911 active_rx_cnt < idle_rx_cnt);
912 }
913 EXPORT_SYMBOL(iwl_set_rxon_chain);
914
915 /**
916 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
917 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
918 * @channel: Any channel valid for the requested phymode
919
920 * In addition to setting the staging RXON, priv->phymode is also set.
921 *
922 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
923 * in the staging RXON flag structure based on the phymode
924 */
925 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
926 {
927 enum ieee80211_band band = ch->band;
928 u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
929
930 if (!iwl_get_channel_info(priv, band, channel)) {
931 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
932 channel, band);
933 return -EINVAL;
934 }
935
936 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
937 (priv->band == band))
938 return 0;
939
940 priv->staging_rxon.channel = cpu_to_le16(channel);
941 if (band == IEEE80211_BAND_5GHZ)
942 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
943 else
944 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
945
946 priv->band = band;
947
948 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
949
950 return 0;
951 }
952 EXPORT_SYMBOL(iwl_set_rxon_channel);
953
954 void iwl_set_flags_for_band(struct iwl_priv *priv,
955 enum ieee80211_band band)
956 {
957 if (band == IEEE80211_BAND_5GHZ) {
958 priv->staging_rxon.flags &=
959 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
960 | RXON_FLG_CCK_MSK);
961 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
962 } else {
963 /* Copied from iwl_post_associate() */
964 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
965 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
966 else
967 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
968
969 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
970 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
971
972 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
973 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
974 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
975 }
976 }
977
978 /*
979 * initialize rxon structure with default values from eeprom
980 */
981 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
982 {
983 const struct iwl_channel_info *ch_info;
984
985 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
986
987 switch (mode) {
988 case NL80211_IFTYPE_AP:
989 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
990 break;
991
992 case NL80211_IFTYPE_STATION:
993 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
994 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
995 break;
996
997 case NL80211_IFTYPE_ADHOC:
998 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
999 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1000 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1001 RXON_FILTER_ACCEPT_GRP_MSK;
1002 break;
1003
1004 default:
1005 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1006 break;
1007 }
1008
1009 #if 0
1010 /* TODO: Figure out when short_preamble would be set and cache from
1011 * that */
1012 if (!hw_to_local(priv->hw)->short_preamble)
1013 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1014 else
1015 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1016 #endif
1017
1018 ch_info = iwl_get_channel_info(priv, priv->band,
1019 le16_to_cpu(priv->active_rxon.channel));
1020
1021 if (!ch_info)
1022 ch_info = &priv->channel_info[0];
1023
1024 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1025 priv->band = ch_info->band;
1026
1027 iwl_set_flags_for_band(priv, priv->band);
1028
1029 priv->staging_rxon.ofdm_basic_rates =
1030 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1031 priv->staging_rxon.cck_basic_rates =
1032 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1033
1034 /* clear both MIX and PURE40 mode flag */
1035 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1036 RXON_FLG_CHANNEL_MODE_PURE_40);
1037 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1038 memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1039 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1040 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1041 priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1042 }
1043 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1044
1045 static void iwl_set_rate(struct iwl_priv *priv)
1046 {
1047 const struct ieee80211_supported_band *hw = NULL;
1048 struct ieee80211_rate *rate;
1049 int i;
1050
1051 hw = iwl_get_hw_mode(priv, priv->band);
1052 if (!hw) {
1053 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1054 return;
1055 }
1056
1057 priv->active_rate = 0;
1058
1059 for (i = 0; i < hw->n_bitrates; i++) {
1060 rate = &(hw->bitrates[i]);
1061 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1062 priv->active_rate |= (1 << rate->hw_value);
1063 }
1064
1065 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1066
1067 priv->staging_rxon.cck_basic_rates =
1068 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1069
1070 priv->staging_rxon.ofdm_basic_rates =
1071 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1072 }
1073
1074 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1075 {
1076 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1077 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1078 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1079
1080 if (priv->switch_rxon.switch_in_progress) {
1081 if (!le32_to_cpu(csa->status) &&
1082 (csa->channel == priv->switch_rxon.channel)) {
1083 rxon->channel = csa->channel;
1084 priv->staging_rxon.channel = csa->channel;
1085 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1086 le16_to_cpu(csa->channel));
1087 } else
1088 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1089 le16_to_cpu(csa->channel));
1090
1091 priv->switch_rxon.switch_in_progress = false;
1092 }
1093 }
1094 EXPORT_SYMBOL(iwl_rx_csa);
1095
1096 #ifdef CONFIG_IWLWIFI_DEBUG
1097 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1098 {
1099 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1100
1101 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1102 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1103 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1104 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1105 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1106 le32_to_cpu(rxon->filter_flags));
1107 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1108 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1109 rxon->ofdm_basic_rates);
1110 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1111 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1112 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1113 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1114 }
1115 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1116 #endif
1117 /**
1118 * iwl_irq_handle_error - called for HW or SW error interrupt from card
1119 */
1120 void iwl_irq_handle_error(struct iwl_priv *priv)
1121 {
1122 /* Set the FW error flag -- cleared on iwl_down */
1123 set_bit(STATUS_FW_ERROR, &priv->status);
1124
1125 /* Cancel currently queued command. */
1126 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1127
1128 priv->cfg->ops->lib->dump_nic_error_log(priv);
1129 if (priv->cfg->ops->lib->dump_csr)
1130 priv->cfg->ops->lib->dump_csr(priv);
1131 if (priv->cfg->ops->lib->dump_fh)
1132 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1133 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1134 #ifdef CONFIG_IWLWIFI_DEBUG
1135 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1136 iwl_print_rx_config_cmd(priv);
1137 #endif
1138
1139 wake_up_interruptible(&priv->wait_command_queue);
1140
1141 /* Keep the restart process from trying to send host
1142 * commands by clearing the INIT status bit */
1143 clear_bit(STATUS_READY, &priv->status);
1144
1145 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1146 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1147 "Restarting adapter due to uCode error.\n");
1148
1149 if (priv->cfg->mod_params->restart_fw)
1150 queue_work(priv->workqueue, &priv->restart);
1151 }
1152 }
1153 EXPORT_SYMBOL(iwl_irq_handle_error);
1154
1155 static int iwl_apm_stop_master(struct iwl_priv *priv)
1156 {
1157 int ret = 0;
1158
1159 /* stop device's busmaster DMA activity */
1160 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1161
1162 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1163 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1164 if (ret)
1165 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1166
1167 IWL_DEBUG_INFO(priv, "stop master\n");
1168
1169 return ret;
1170 }
1171
1172 void iwl_apm_stop(struct iwl_priv *priv)
1173 {
1174 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1175
1176 /* Stop device's DMA activity */
1177 iwl_apm_stop_master(priv);
1178
1179 /* Reset the entire device */
1180 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1181
1182 udelay(10);
1183
1184 /*
1185 * Clear "initialization complete" bit to move adapter from
1186 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1187 */
1188 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1189 }
1190 EXPORT_SYMBOL(iwl_apm_stop);
1191
1192
1193 /*
1194 * Start up NIC's basic functionality after it has been reset
1195 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1196 * NOTE: This does not load uCode nor start the embedded processor
1197 */
1198 int iwl_apm_init(struct iwl_priv *priv)
1199 {
1200 int ret = 0;
1201 u16 lctl;
1202
1203 IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1204
1205 /*
1206 * Use "set_bit" below rather than "write", to preserve any hardware
1207 * bits already set by default after reset.
1208 */
1209
1210 /* Disable L0S exit timer (platform NMI Work/Around) */
1211 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1212 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1213
1214 /*
1215 * Disable L0s without affecting L1;
1216 * don't wait for ICH L0s (ICH bug W/A)
1217 */
1218 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1219 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1220
1221 /* Set FH wait threshold to maximum (HW error during stress W/A) */
1222 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1223
1224 /*
1225 * Enable HAP INTA (interrupt from management bus) to
1226 * wake device's PCI Express link L1a -> L0s
1227 * NOTE: This is no-op for 3945 (non-existant bit)
1228 */
1229 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1230 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1231
1232 /*
1233 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1234 * Check if BIOS (or OS) enabled L1-ASPM on this device.
1235 * If so (likely), disable L0S, so device moves directly L0->L1;
1236 * costs negligible amount of power savings.
1237 * If not (unlikely), enable L0S, so there is at least some
1238 * power savings, even without L1.
1239 */
1240 if (priv->cfg->set_l0s) {
1241 lctl = iwl_pcie_link_ctl(priv);
1242 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1243 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1244 /* L1-ASPM enabled; disable(!) L0S */
1245 iwl_set_bit(priv, CSR_GIO_REG,
1246 CSR_GIO_REG_VAL_L0S_ENABLED);
1247 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1248 } else {
1249 /* L1-ASPM disabled; enable(!) L0S */
1250 iwl_clear_bit(priv, CSR_GIO_REG,
1251 CSR_GIO_REG_VAL_L0S_ENABLED);
1252 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1253 }
1254 }
1255
1256 /* Configure analog phase-lock-loop before activating to D0A */
1257 if (priv->cfg->pll_cfg_val)
1258 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1259
1260 /*
1261 * Set "initialization complete" bit to move adapter from
1262 * D0U* --> D0A* (powered-up active) state.
1263 */
1264 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1265
1266 /*
1267 * Wait for clock stabilization; once stabilized, access to
1268 * device-internal resources is supported, e.g. iwl_write_prph()
1269 * and accesses to uCode SRAM.
1270 */
1271 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1272 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1273 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1274 if (ret < 0) {
1275 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1276 goto out;
1277 }
1278
1279 /*
1280 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1281 * BSM (Boostrap State Machine) is only in 3945 and 4965;
1282 * later devices (i.e. 5000 and later) have non-volatile SRAM,
1283 * and don't need BSM to restore data after power-saving sleep.
1284 *
1285 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1286 * do not disable clocks. This preserves any hardware bits already
1287 * set by default in "CLK_CTRL_REG" after reset.
1288 */
1289 if (priv->cfg->use_bsm)
1290 iwl_write_prph(priv, APMG_CLK_EN_REG,
1291 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1292 else
1293 iwl_write_prph(priv, APMG_CLK_EN_REG,
1294 APMG_CLK_VAL_DMA_CLK_RQT);
1295 udelay(20);
1296
1297 /* Disable L1-Active */
1298 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1299 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1300
1301 out:
1302 return ret;
1303 }
1304 EXPORT_SYMBOL(iwl_apm_init);
1305
1306
1307
1308 void iwl_configure_filter(struct ieee80211_hw *hw,
1309 unsigned int changed_flags,
1310 unsigned int *total_flags,
1311 u64 multicast)
1312 {
1313 struct iwl_priv *priv = hw->priv;
1314 __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1315
1316 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1317 changed_flags, *total_flags);
1318
1319 if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1320 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1321 *filter_flags |= RXON_FILTER_PROMISC_MSK;
1322 else
1323 *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1324 }
1325 if (changed_flags & FIF_ALLMULTI) {
1326 if (*total_flags & FIF_ALLMULTI)
1327 *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1328 else
1329 *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1330 }
1331 if (changed_flags & FIF_CONTROL) {
1332 if (*total_flags & FIF_CONTROL)
1333 *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1334 else
1335 *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1336 }
1337 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1338 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1339 *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1340 else
1341 *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1342 }
1343
1344 /* We avoid iwl_commit_rxon here to commit the new filter flags
1345 * since mac80211 will call ieee80211_hw_config immediately.
1346 * (mc_list is not supported at this time). Otherwise, we need to
1347 * queue a background iwl_commit_rxon work.
1348 */
1349
1350 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1351 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1352 }
1353 EXPORT_SYMBOL(iwl_configure_filter);
1354
1355 int iwl_set_hw_params(struct iwl_priv *priv)
1356 {
1357 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1358 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1359 if (priv->cfg->mod_params->amsdu_size_8K)
1360 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1361 else
1362 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1363
1364 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1365
1366 if (priv->cfg->mod_params->disable_11n)
1367 priv->cfg->sku &= ~IWL_SKU_N;
1368
1369 /* Device-specific setup */
1370 return priv->cfg->ops->lib->set_hw_params(priv);
1371 }
1372 EXPORT_SYMBOL(iwl_set_hw_params);
1373
1374 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1375 {
1376 int ret = 0;
1377 s8 prev_tx_power = priv->tx_power_user_lmt;
1378
1379 if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1380 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1381 tx_power,
1382 IWL_TX_POWER_TARGET_POWER_MIN);
1383 return -EINVAL;
1384 }
1385
1386 if (tx_power > priv->tx_power_device_lmt) {
1387 IWL_WARN(priv,
1388 "Requested user TXPOWER %d above upper limit %d.\n",
1389 tx_power, priv->tx_power_device_lmt);
1390 return -EINVAL;
1391 }
1392
1393 if (priv->tx_power_user_lmt != tx_power)
1394 force = true;
1395
1396 /* if nic is not up don't send command */
1397 if (iwl_is_ready_rf(priv)) {
1398 priv->tx_power_user_lmt = tx_power;
1399 if (force && priv->cfg->ops->lib->send_tx_power)
1400 ret = priv->cfg->ops->lib->send_tx_power(priv);
1401 else if (!priv->cfg->ops->lib->send_tx_power)
1402 ret = -EOPNOTSUPP;
1403 /*
1404 * if fail to set tx_power, restore the orig. tx power
1405 */
1406 if (ret)
1407 priv->tx_power_user_lmt = prev_tx_power;
1408 }
1409
1410 /*
1411 * Even this is an async host command, the command
1412 * will always report success from uCode
1413 * So once driver can placing the command into the queue
1414 * successfully, driver can use priv->tx_power_user_lmt
1415 * to reflect the current tx power
1416 */
1417 return ret;
1418 }
1419 EXPORT_SYMBOL(iwl_set_tx_power);
1420
1421 irqreturn_t iwl_isr_legacy(int irq, void *data)
1422 {
1423 struct iwl_priv *priv = data;
1424 u32 inta, inta_mask;
1425 u32 inta_fh;
1426 unsigned long flags;
1427 if (!priv)
1428 return IRQ_NONE;
1429
1430 spin_lock_irqsave(&priv->lock, flags);
1431
1432 /* Disable (but don't clear!) interrupts here to avoid
1433 * back-to-back ISRs and sporadic interrupts from our NIC.
1434 * If we have something to service, the tasklet will re-enable ints.
1435 * If we *don't* have something, we'll re-enable before leaving here. */
1436 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
1437 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1438
1439 /* Discover which interrupts are active/pending */
1440 inta = iwl_read32(priv, CSR_INT);
1441 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1442
1443 /* Ignore interrupt if there's nothing in NIC to service.
1444 * This may be due to IRQ shared with another device,
1445 * or due to sporadic interrupts thrown from our NIC. */
1446 if (!inta && !inta_fh) {
1447 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1448 goto none;
1449 }
1450
1451 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1452 /* Hardware disappeared. It might have already raised
1453 * an interrupt */
1454 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1455 goto unplugged;
1456 }
1457
1458 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1459 inta, inta_mask, inta_fh);
1460
1461 inta &= ~CSR_INT_BIT_SCD;
1462
1463 /* iwl_irq_tasklet() will service interrupts and re-enable them */
1464 if (likely(inta || inta_fh))
1465 tasklet_schedule(&priv->irq_tasklet);
1466
1467 unplugged:
1468 spin_unlock_irqrestore(&priv->lock, flags);
1469 return IRQ_HANDLED;
1470
1471 none:
1472 /* re-enable interrupts here since we don't have anything to service. */
1473 /* only Re-enable if diabled by irq */
1474 if (test_bit(STATUS_INT_ENABLED, &priv->status))
1475 iwl_enable_interrupts(priv);
1476 spin_unlock_irqrestore(&priv->lock, flags);
1477 return IRQ_NONE;
1478 }
1479 EXPORT_SYMBOL(iwl_isr_legacy);
1480
1481 int iwl_send_bt_config(struct iwl_priv *priv)
1482 {
1483 struct iwl_bt_cmd bt_cmd = {
1484 .lead_time = BT_LEAD_TIME_DEF,
1485 .max_kill = BT_MAX_KILL_DEF,
1486 .kill_ack_mask = 0,
1487 .kill_cts_mask = 0,
1488 };
1489
1490 if (!bt_coex_active)
1491 bt_cmd.flags = BT_COEX_DISABLE;
1492 else
1493 bt_cmd.flags = BT_COEX_ENABLE;
1494
1495 IWL_DEBUG_INFO(priv, "BT coex %s\n",
1496 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1497
1498 return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1499 sizeof(struct iwl_bt_cmd), &bt_cmd);
1500 }
1501 EXPORT_SYMBOL(iwl_send_bt_config);
1502
1503 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1504 {
1505 struct iwl_statistics_cmd statistics_cmd = {
1506 .configuration_flags =
1507 clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1508 };
1509
1510 if (flags & CMD_ASYNC)
1511 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1512 sizeof(struct iwl_statistics_cmd),
1513 &statistics_cmd, NULL);
1514 else
1515 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1516 sizeof(struct iwl_statistics_cmd),
1517 &statistics_cmd);
1518 }
1519 EXPORT_SYMBOL(iwl_send_statistics_request);
1520
1521 /**
1522 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1523 * using sample data 100 bytes apart. If these sample points are good,
1524 * it's a pretty good bet that everything between them is good, too.
1525 */
1526 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1527 {
1528 u32 val;
1529 int ret = 0;
1530 u32 errcnt = 0;
1531 u32 i;
1532
1533 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1534
1535 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1536 /* read data comes through single port, auto-incr addr */
1537 /* NOTE: Use the debugless read so we don't flood kernel log
1538 * if IWL_DL_IO is set */
1539 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1540 i + IWL49_RTC_INST_LOWER_BOUND);
1541 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1542 if (val != le32_to_cpu(*image)) {
1543 ret = -EIO;
1544 errcnt++;
1545 if (errcnt >= 3)
1546 break;
1547 }
1548 }
1549
1550 return ret;
1551 }
1552
1553 /**
1554 * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1555 * looking at all data.
1556 */
1557 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1558 u32 len)
1559 {
1560 u32 val;
1561 u32 save_len = len;
1562 int ret = 0;
1563 u32 errcnt;
1564
1565 IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1566
1567 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1568 IWL49_RTC_INST_LOWER_BOUND);
1569
1570 errcnt = 0;
1571 for (; len > 0; len -= sizeof(u32), image++) {
1572 /* read data comes through single port, auto-incr addr */
1573 /* NOTE: Use the debugless read so we don't flood kernel log
1574 * if IWL_DL_IO is set */
1575 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1576 if (val != le32_to_cpu(*image)) {
1577 IWL_ERR(priv, "uCode INST section is invalid at "
1578 "offset 0x%x, is 0x%x, s/b 0x%x\n",
1579 save_len - len, val, le32_to_cpu(*image));
1580 ret = -EIO;
1581 errcnt++;
1582 if (errcnt >= 20)
1583 break;
1584 }
1585 }
1586
1587 if (!errcnt)
1588 IWL_DEBUG_INFO(priv,
1589 "ucode image in INSTRUCTION memory is good\n");
1590
1591 return ret;
1592 }
1593
1594 /**
1595 * iwl_verify_ucode - determine which instruction image is in SRAM,
1596 * and verify its contents
1597 */
1598 int iwl_verify_ucode(struct iwl_priv *priv)
1599 {
1600 __le32 *image;
1601 u32 len;
1602 int ret;
1603
1604 /* Try bootstrap */
1605 image = (__le32 *)priv->ucode_boot.v_addr;
1606 len = priv->ucode_boot.len;
1607 ret = iwlcore_verify_inst_sparse(priv, image, len);
1608 if (!ret) {
1609 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1610 return 0;
1611 }
1612
1613 /* Try initialize */
1614 image = (__le32 *)priv->ucode_init.v_addr;
1615 len = priv->ucode_init.len;
1616 ret = iwlcore_verify_inst_sparse(priv, image, len);
1617 if (!ret) {
1618 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1619 return 0;
1620 }
1621
1622 /* Try runtime/protocol */
1623 image = (__le32 *)priv->ucode_code.v_addr;
1624 len = priv->ucode_code.len;
1625 ret = iwlcore_verify_inst_sparse(priv, image, len);
1626 if (!ret) {
1627 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1628 return 0;
1629 }
1630
1631 IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1632
1633 /* Since nothing seems to match, show first several data entries in
1634 * instruction SRAM, so maybe visual inspection will give a clue.
1635 * Selection of bootstrap image (vs. other images) is arbitrary. */
1636 image = (__le32 *)priv->ucode_boot.v_addr;
1637 len = priv->ucode_boot.len;
1638 ret = iwl_verify_inst_full(priv, image, len);
1639
1640 return ret;
1641 }
1642 EXPORT_SYMBOL(iwl_verify_ucode);
1643
1644
1645 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1646 {
1647 struct iwl_ct_kill_config cmd;
1648 struct iwl_ct_kill_throttling_config adv_cmd;
1649 unsigned long flags;
1650 int ret = 0;
1651
1652 spin_lock_irqsave(&priv->lock, flags);
1653 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1654 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1655 spin_unlock_irqrestore(&priv->lock, flags);
1656 priv->thermal_throttle.ct_kill_toggle = false;
1657
1658 if (priv->cfg->support_ct_kill_exit) {
1659 adv_cmd.critical_temperature_enter =
1660 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1661 adv_cmd.critical_temperature_exit =
1662 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1663
1664 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1665 sizeof(adv_cmd), &adv_cmd);
1666 if (ret)
1667 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1668 else
1669 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1670 "succeeded, "
1671 "critical temperature enter is %d,"
1672 "exit is %d\n",
1673 priv->hw_params.ct_kill_threshold,
1674 priv->hw_params.ct_kill_exit_threshold);
1675 } else {
1676 cmd.critical_temperature_R =
1677 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1678
1679 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1680 sizeof(cmd), &cmd);
1681 if (ret)
1682 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1683 else
1684 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1685 "succeeded, "
1686 "critical temperature is %d\n",
1687 priv->hw_params.ct_kill_threshold);
1688 }
1689 }
1690 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1691
1692
1693 /*
1694 * CARD_STATE_CMD
1695 *
1696 * Use: Sets the device's internal card state to enable, disable, or halt
1697 *
1698 * When in the 'enable' state the card operates as normal.
1699 * When in the 'disable' state, the card enters into a low power mode.
1700 * When in the 'halt' state, the card is shut down and must be fully
1701 * restarted to come back on.
1702 */
1703 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1704 {
1705 struct iwl_host_cmd cmd = {
1706 .id = REPLY_CARD_STATE_CMD,
1707 .len = sizeof(u32),
1708 .data = &flags,
1709 .flags = meta_flag,
1710 };
1711
1712 return iwl_send_cmd(priv, &cmd);
1713 }
1714
1715 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1716 struct iwl_rx_mem_buffer *rxb)
1717 {
1718 #ifdef CONFIG_IWLWIFI_DEBUG
1719 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1720 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1721 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1722 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1723 #endif
1724 }
1725 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1726
1727 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1728 struct iwl_rx_mem_buffer *rxb)
1729 {
1730 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1731 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1732 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1733 "notification for %s:\n", len,
1734 get_cmd_string(pkt->hdr.cmd));
1735 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1736 }
1737 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1738
1739 void iwl_rx_reply_error(struct iwl_priv *priv,
1740 struct iwl_rx_mem_buffer *rxb)
1741 {
1742 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1743
1744 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1745 "seq 0x%04X ser 0x%08X\n",
1746 le32_to_cpu(pkt->u.err_resp.error_type),
1747 get_cmd_string(pkt->u.err_resp.cmd_id),
1748 pkt->u.err_resp.cmd_id,
1749 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1750 le32_to_cpu(pkt->u.err_resp.error_info));
1751 }
1752 EXPORT_SYMBOL(iwl_rx_reply_error);
1753
1754 void iwl_clear_isr_stats(struct iwl_priv *priv)
1755 {
1756 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1757 }
1758
1759 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1760 const struct ieee80211_tx_queue_params *params)
1761 {
1762 struct iwl_priv *priv = hw->priv;
1763 unsigned long flags;
1764 int q;
1765
1766 IWL_DEBUG_MAC80211(priv, "enter\n");
1767
1768 if (!iwl_is_ready_rf(priv)) {
1769 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1770 return -EIO;
1771 }
1772
1773 if (queue >= AC_NUM) {
1774 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1775 return 0;
1776 }
1777
1778 q = AC_NUM - 1 - queue;
1779
1780 spin_lock_irqsave(&priv->lock, flags);
1781
1782 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1783 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1784 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1785 priv->qos_data.def_qos_parm.ac[q].edca_txop =
1786 cpu_to_le16((params->txop * 32));
1787
1788 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1789
1790 spin_unlock_irqrestore(&priv->lock, flags);
1791
1792 IWL_DEBUG_MAC80211(priv, "leave\n");
1793 return 0;
1794 }
1795 EXPORT_SYMBOL(iwl_mac_conf_tx);
1796
1797 static void iwl_ht_conf(struct iwl_priv *priv,
1798 struct ieee80211_bss_conf *bss_conf)
1799 {
1800 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1801 struct ieee80211_sta *sta;
1802
1803 IWL_DEBUG_MAC80211(priv, "enter: \n");
1804
1805 if (!ht_conf->is_ht)
1806 return;
1807
1808 ht_conf->ht_protection =
1809 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1810 ht_conf->non_GF_STA_present =
1811 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1812
1813 ht_conf->single_chain_sufficient = false;
1814
1815 switch (priv->iw_mode) {
1816 case NL80211_IFTYPE_STATION:
1817 rcu_read_lock();
1818 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1819 if (sta) {
1820 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1821 int maxstreams;
1822
1823 maxstreams = (ht_cap->mcs.tx_params &
1824 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1825 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1826 maxstreams += 1;
1827
1828 if ((ht_cap->mcs.rx_mask[1] == 0) &&
1829 (ht_cap->mcs.rx_mask[2] == 0))
1830 ht_conf->single_chain_sufficient = true;
1831 if (maxstreams <= 1)
1832 ht_conf->single_chain_sufficient = true;
1833 } else {
1834 /*
1835 * If at all, this can only happen through a race
1836 * when the AP disconnects us while we're still
1837 * setting up the connection, in that case mac80211
1838 * will soon tell us about that.
1839 */
1840 ht_conf->single_chain_sufficient = true;
1841 }
1842 rcu_read_unlock();
1843 break;
1844 case NL80211_IFTYPE_ADHOC:
1845 ht_conf->single_chain_sufficient = true;
1846 break;
1847 default:
1848 break;
1849 }
1850
1851 IWL_DEBUG_MAC80211(priv, "leave\n");
1852 }
1853
1854 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1855 {
1856 priv->assoc_id = 0;
1857 iwl_led_disassociate(priv);
1858 /*
1859 * inform the ucode that there is no longer an
1860 * association and that no more packets should be
1861 * sent
1862 */
1863 priv->staging_rxon.filter_flags &=
1864 ~RXON_FILTER_ASSOC_MSK;
1865 priv->staging_rxon.assoc_id = 0;
1866 iwlcore_commit_rxon(priv);
1867 }
1868
1869 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
1870 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1871 struct ieee80211_vif *vif,
1872 struct ieee80211_bss_conf *bss_conf,
1873 u32 changes)
1874 {
1875 struct iwl_priv *priv = hw->priv;
1876 int ret;
1877
1878 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1879
1880 if (!iwl_is_alive(priv))
1881 return;
1882
1883 mutex_lock(&priv->mutex);
1884
1885 if (changes & BSS_CHANGED_BEACON &&
1886 priv->iw_mode == NL80211_IFTYPE_AP) {
1887 dev_kfree_skb(priv->ibss_beacon);
1888 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1889 }
1890
1891 if (changes & BSS_CHANGED_BEACON_INT) {
1892 priv->beacon_int = bss_conf->beacon_int;
1893 /* TODO: in AP mode, do something to make this take effect */
1894 }
1895
1896 if (changes & BSS_CHANGED_BSSID) {
1897 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1898
1899 /*
1900 * If there is currently a HW scan going on in the
1901 * background then we need to cancel it else the RXON
1902 * below/in post_associate will fail.
1903 */
1904 if (iwl_scan_cancel_timeout(priv, 100)) {
1905 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1906 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1907 mutex_unlock(&priv->mutex);
1908 return;
1909 }
1910
1911 /* mac80211 only sets assoc when in STATION mode */
1912 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
1913 bss_conf->assoc) {
1914 memcpy(priv->staging_rxon.bssid_addr,
1915 bss_conf->bssid, ETH_ALEN);
1916
1917 /* currently needed in a few places */
1918 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1919 } else {
1920 priv->staging_rxon.filter_flags &=
1921 ~RXON_FILTER_ASSOC_MSK;
1922 }
1923
1924 }
1925
1926 /*
1927 * This needs to be after setting the BSSID in case
1928 * mac80211 decides to do both changes at once because
1929 * it will invoke post_associate.
1930 */
1931 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
1932 changes & BSS_CHANGED_BEACON) {
1933 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1934
1935 if (beacon)
1936 iwl_mac_beacon_update(hw, beacon);
1937 }
1938
1939 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1940 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1941 bss_conf->use_short_preamble);
1942 if (bss_conf->use_short_preamble)
1943 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1944 else
1945 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1946 }
1947
1948 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1949 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1950 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1951 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1952 else
1953 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1954 }
1955
1956 if (changes & BSS_CHANGED_BASIC_RATES) {
1957 /* XXX use this information
1958 *
1959 * To do that, remove code from iwl_set_rate() and put something
1960 * like this here:
1961 *
1962 if (A-band)
1963 priv->staging_rxon.ofdm_basic_rates =
1964 bss_conf->basic_rates;
1965 else
1966 priv->staging_rxon.ofdm_basic_rates =
1967 bss_conf->basic_rates >> 4;
1968 priv->staging_rxon.cck_basic_rates =
1969 bss_conf->basic_rates & 0xF;
1970 */
1971 }
1972
1973 if (changes & BSS_CHANGED_HT) {
1974 iwl_ht_conf(priv, bss_conf);
1975
1976 if (priv->cfg->ops->hcmd->set_rxon_chain)
1977 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1978 }
1979
1980 if (changes & BSS_CHANGED_ASSOC) {
1981 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1982 if (bss_conf->assoc) {
1983 priv->assoc_id = bss_conf->aid;
1984 priv->beacon_int = bss_conf->beacon_int;
1985 priv->timestamp = bss_conf->timestamp;
1986 priv->assoc_capability = bss_conf->assoc_capability;
1987
1988 iwl_led_associate(priv);
1989
1990 /*
1991 * We have just associated, don't start scan too early
1992 * leave time for EAPOL exchange to complete.
1993 *
1994 * XXX: do this in mac80211
1995 */
1996 priv->next_scan_jiffies = jiffies +
1997 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
1998 if (!iwl_is_rfkill(priv))
1999 priv->cfg->ops->lib->post_associate(priv);
2000 } else
2001 iwl_set_no_assoc(priv);
2002 }
2003
2004 if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2005 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2006 changes);
2007 ret = iwl_send_rxon_assoc(priv);
2008 if (!ret) {
2009 /* Sync active_rxon with latest change. */
2010 memcpy((void *)&priv->active_rxon,
2011 &priv->staging_rxon,
2012 sizeof(struct iwl_rxon_cmd));
2013 }
2014 }
2015
2016 if (changes & BSS_CHANGED_BEACON_ENABLED) {
2017 if (vif->bss_conf.enable_beacon) {
2018 memcpy(priv->staging_rxon.bssid_addr,
2019 bss_conf->bssid, ETH_ALEN);
2020 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2021 iwlcore_config_ap(priv);
2022 } else
2023 iwl_set_no_assoc(priv);
2024 }
2025
2026 mutex_unlock(&priv->mutex);
2027
2028 IWL_DEBUG_MAC80211(priv, "leave\n");
2029 }
2030 EXPORT_SYMBOL(iwl_bss_info_changed);
2031
2032 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2033 {
2034 struct iwl_priv *priv = hw->priv;
2035 unsigned long flags;
2036 __le64 timestamp;
2037
2038 IWL_DEBUG_MAC80211(priv, "enter\n");
2039
2040 if (!iwl_is_ready_rf(priv)) {
2041 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2042 return -EIO;
2043 }
2044
2045 spin_lock_irqsave(&priv->lock, flags);
2046
2047 if (priv->ibss_beacon)
2048 dev_kfree_skb(priv->ibss_beacon);
2049
2050 priv->ibss_beacon = skb;
2051
2052 priv->assoc_id = 0;
2053 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2054 priv->timestamp = le64_to_cpu(timestamp);
2055
2056 IWL_DEBUG_MAC80211(priv, "leave\n");
2057 spin_unlock_irqrestore(&priv->lock, flags);
2058
2059 priv->cfg->ops->lib->post_associate(priv);
2060
2061 return 0;
2062 }
2063 EXPORT_SYMBOL(iwl_mac_beacon_update);
2064
2065 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2066 {
2067 iwl_connection_init_rx_config(priv, vif->type);
2068
2069 if (priv->cfg->ops->hcmd->set_rxon_chain)
2070 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2071
2072 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2073
2074 return iwlcore_commit_rxon(priv);
2075 }
2076
2077 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2078 {
2079 struct iwl_priv *priv = hw->priv;
2080 int err = 0;
2081
2082 IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2083
2084 mutex_lock(&priv->mutex);
2085
2086 if (WARN_ON(!iwl_is_ready_rf(priv))) {
2087 err = -EINVAL;
2088 goto out;
2089 }
2090
2091 if (priv->vif) {
2092 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2093 err = -EOPNOTSUPP;
2094 goto out;
2095 }
2096
2097 priv->vif = vif;
2098 priv->iw_mode = vif->type;
2099
2100 IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2101 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2102
2103 err = iwl_set_mode(priv, vif);
2104 if (err)
2105 goto out_err;
2106
2107 /* Add the broadcast address so we can send broadcast frames */
2108 priv->cfg->ops->lib->add_bcast_station(priv);
2109
2110 goto out;
2111
2112 out_err:
2113 priv->vif = NULL;
2114 priv->iw_mode = NL80211_IFTYPE_STATION;
2115 out:
2116 mutex_unlock(&priv->mutex);
2117
2118 IWL_DEBUG_MAC80211(priv, "leave\n");
2119 return err;
2120 }
2121 EXPORT_SYMBOL(iwl_mac_add_interface);
2122
2123 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2124 struct ieee80211_vif *vif)
2125 {
2126 struct iwl_priv *priv = hw->priv;
2127
2128 IWL_DEBUG_MAC80211(priv, "enter\n");
2129
2130 mutex_lock(&priv->mutex);
2131
2132 iwl_clear_ucode_stations(priv, true);
2133
2134 if (iwl_is_ready_rf(priv)) {
2135 iwl_scan_cancel_timeout(priv, 100);
2136 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2137 iwlcore_commit_rxon(priv);
2138 }
2139 if (priv->vif == vif) {
2140 priv->vif = NULL;
2141 memset(priv->bssid, 0, ETH_ALEN);
2142 }
2143 mutex_unlock(&priv->mutex);
2144
2145 IWL_DEBUG_MAC80211(priv, "leave\n");
2146
2147 }
2148 EXPORT_SYMBOL(iwl_mac_remove_interface);
2149
2150 /**
2151 * iwl_mac_config - mac80211 config callback
2152 *
2153 * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2154 * be set inappropriately and the driver currently sets the hardware up to
2155 * use it whenever needed.
2156 */
2157 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2158 {
2159 struct iwl_priv *priv = hw->priv;
2160 const struct iwl_channel_info *ch_info;
2161 struct ieee80211_conf *conf = &hw->conf;
2162 struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2163 unsigned long flags = 0;
2164 int ret = 0;
2165 u16 ch;
2166 int scan_active = 0;
2167
2168 mutex_lock(&priv->mutex);
2169
2170 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2171 conf->channel->hw_value, changed);
2172
2173 if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2174 test_bit(STATUS_SCANNING, &priv->status))) {
2175 scan_active = 1;
2176 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2177 }
2178
2179 if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2180 IEEE80211_CONF_CHANGE_CHANNEL)) {
2181 /* mac80211 uses static for non-HT which is what we want */
2182 priv->current_ht_config.smps = conf->smps_mode;
2183
2184 /*
2185 * Recalculate chain counts.
2186 *
2187 * If monitor mode is enabled then mac80211 will
2188 * set up the SM PS mode to OFF if an HT channel is
2189 * configured.
2190 */
2191 if (priv->cfg->ops->hcmd->set_rxon_chain)
2192 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2193 }
2194
2195 /* during scanning mac80211 will delay channel setting until
2196 * scan finish with changed = 0
2197 */
2198 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2199 if (scan_active)
2200 goto set_ch_out;
2201
2202 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2203 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2204 if (!is_channel_valid(ch_info)) {
2205 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2206 ret = -EINVAL;
2207 goto set_ch_out;
2208 }
2209
2210 spin_lock_irqsave(&priv->lock, flags);
2211
2212 /* Configure HT40 channels */
2213 ht_conf->is_ht = conf_is_ht(conf);
2214 if (ht_conf->is_ht) {
2215 if (conf_is_ht40_minus(conf)) {
2216 ht_conf->extension_chan_offset =
2217 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2218 ht_conf->is_40mhz = true;
2219 } else if (conf_is_ht40_plus(conf)) {
2220 ht_conf->extension_chan_offset =
2221 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2222 ht_conf->is_40mhz = true;
2223 } else {
2224 ht_conf->extension_chan_offset =
2225 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2226 ht_conf->is_40mhz = false;
2227 }
2228 } else
2229 ht_conf->is_40mhz = false;
2230 /* Default to no protection. Protection mode will later be set
2231 * from BSS config in iwl_ht_conf */
2232 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2233
2234 /* if we are switching from ht to 2.4 clear flags
2235 * from any ht related info since 2.4 does not
2236 * support ht */
2237 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2238 priv->staging_rxon.flags = 0;
2239
2240 iwl_set_rxon_channel(priv, conf->channel);
2241 iwl_set_rxon_ht(priv, ht_conf);
2242
2243 iwl_set_flags_for_band(priv, conf->channel->band);
2244 spin_unlock_irqrestore(&priv->lock, flags);
2245 if (iwl_is_associated(priv) &&
2246 (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2247 priv->cfg->ops->lib->set_channel_switch) {
2248 iwl_set_rate(priv);
2249 /*
2250 * at this point, staging_rxon has the
2251 * configuration for channel switch
2252 */
2253 ret = priv->cfg->ops->lib->set_channel_switch(priv,
2254 ch);
2255 if (!ret) {
2256 iwl_print_rx_config_cmd(priv);
2257 goto out;
2258 }
2259 priv->switch_rxon.switch_in_progress = false;
2260 }
2261 set_ch_out:
2262 /* The list of supported rates and rate mask can be different
2263 * for each band; since the band may have changed, reset
2264 * the rate mask to what mac80211 lists */
2265 iwl_set_rate(priv);
2266 }
2267
2268 if (changed & (IEEE80211_CONF_CHANGE_PS |
2269 IEEE80211_CONF_CHANGE_IDLE)) {
2270 ret = iwl_power_update_mode(priv, false);
2271 if (ret)
2272 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2273 }
2274
2275 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2276 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2277 priv->tx_power_user_lmt, conf->power_level);
2278
2279 iwl_set_tx_power(priv, conf->power_level, false);
2280 }
2281
2282 if (changed & IEEE80211_CONF_CHANGE_QOS) {
2283 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2284
2285 spin_lock_irqsave(&priv->lock, flags);
2286 priv->qos_data.qos_active = qos_active;
2287 iwl_update_qos(priv);
2288 spin_unlock_irqrestore(&priv->lock, flags);
2289 }
2290
2291 if (!iwl_is_ready(priv)) {
2292 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2293 goto out;
2294 }
2295
2296 if (scan_active)
2297 goto out;
2298
2299 if (memcmp(&priv->active_rxon,
2300 &priv->staging_rxon, sizeof(priv->staging_rxon)))
2301 iwlcore_commit_rxon(priv);
2302 else
2303 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2304
2305
2306 out:
2307 IWL_DEBUG_MAC80211(priv, "leave\n");
2308 mutex_unlock(&priv->mutex);
2309 return ret;
2310 }
2311 EXPORT_SYMBOL(iwl_mac_config);
2312
2313 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2314 {
2315 struct iwl_priv *priv = hw->priv;
2316 unsigned long flags;
2317
2318 mutex_lock(&priv->mutex);
2319 IWL_DEBUG_MAC80211(priv, "enter\n");
2320
2321 spin_lock_irqsave(&priv->lock, flags);
2322 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2323 spin_unlock_irqrestore(&priv->lock, flags);
2324
2325 spin_lock_irqsave(&priv->lock, flags);
2326 priv->assoc_id = 0;
2327 priv->assoc_capability = 0;
2328
2329 /* new association get rid of ibss beacon skb */
2330 if (priv->ibss_beacon)
2331 dev_kfree_skb(priv->ibss_beacon);
2332
2333 priv->ibss_beacon = NULL;
2334
2335 priv->beacon_int = priv->vif->bss_conf.beacon_int;
2336 priv->timestamp = 0;
2337
2338 spin_unlock_irqrestore(&priv->lock, flags);
2339
2340 if (!iwl_is_ready_rf(priv)) {
2341 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2342 mutex_unlock(&priv->mutex);
2343 return;
2344 }
2345
2346 /* we are restarting association process
2347 * clear RXON_FILTER_ASSOC_MSK bit
2348 */
2349 iwl_scan_cancel_timeout(priv, 100);
2350 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2351 iwlcore_commit_rxon(priv);
2352
2353 iwl_set_rate(priv);
2354
2355 mutex_unlock(&priv->mutex);
2356
2357 IWL_DEBUG_MAC80211(priv, "leave\n");
2358 }
2359 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2360
2361 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2362 {
2363 if (!priv->txq)
2364 priv->txq = kzalloc(
2365 sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2366 GFP_KERNEL);
2367 if (!priv->txq) {
2368 IWL_ERR(priv, "Not enough memory for txq \n");
2369 return -ENOMEM;
2370 }
2371 return 0;
2372 }
2373 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2374
2375 void iwl_free_txq_mem(struct iwl_priv *priv)
2376 {
2377 kfree(priv->txq);
2378 priv->txq = NULL;
2379 }
2380 EXPORT_SYMBOL(iwl_free_txq_mem);
2381
2382 int iwl_send_wimax_coex(struct iwl_priv *priv)
2383 {
2384 struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);
2385
2386 if (priv->cfg->support_wimax_coexist) {
2387 /* UnMask wake up src at associated sleep */
2388 coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2389
2390 /* UnMask wake up src at unassociated sleep */
2391 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2392 memcpy(coex_cmd.sta_prio, cu_priorities,
2393 sizeof(struct iwl_wimax_coex_event_entry) *
2394 COEX_NUM_OF_EVENTS);
2395
2396 /* enabling the coexistence feature */
2397 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2398
2399 /* enabling the priorities tables */
2400 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2401 } else {
2402 /* coexistence is disabled */
2403 memset(&coex_cmd, 0, sizeof(coex_cmd));
2404 }
2405 return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2406 sizeof(coex_cmd), &coex_cmd);
2407 }
2408 EXPORT_SYMBOL(iwl_send_wimax_coex);
2409
2410 #ifdef CONFIG_IWLWIFI_DEBUGFS
2411
2412 #define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2413
2414 void iwl_reset_traffic_log(struct iwl_priv *priv)
2415 {
2416 priv->tx_traffic_idx = 0;
2417 priv->rx_traffic_idx = 0;
2418 if (priv->tx_traffic)
2419 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2420 if (priv->rx_traffic)
2421 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2422 }
2423
2424 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2425 {
2426 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2427
2428 if (iwl_debug_level & IWL_DL_TX) {
2429 if (!priv->tx_traffic) {
2430 priv->tx_traffic =
2431 kzalloc(traffic_size, GFP_KERNEL);
2432 if (!priv->tx_traffic)
2433 return -ENOMEM;
2434 }
2435 }
2436 if (iwl_debug_level & IWL_DL_RX) {
2437 if (!priv->rx_traffic) {
2438 priv->rx_traffic =
2439 kzalloc(traffic_size, GFP_KERNEL);
2440 if (!priv->rx_traffic)
2441 return -ENOMEM;
2442 }
2443 }
2444 iwl_reset_traffic_log(priv);
2445 return 0;
2446 }
2447 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2448
2449 void iwl_free_traffic_mem(struct iwl_priv *priv)
2450 {
2451 kfree(priv->tx_traffic);
2452 priv->tx_traffic = NULL;
2453
2454 kfree(priv->rx_traffic);
2455 priv->rx_traffic = NULL;
2456 }
2457 EXPORT_SYMBOL(iwl_free_traffic_mem);
2458
2459 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2460 u16 length, struct ieee80211_hdr *header)
2461 {
2462 __le16 fc;
2463 u16 len;
2464
2465 if (likely(!(iwl_debug_level & IWL_DL_TX)))
2466 return;
2467
2468 if (!priv->tx_traffic)
2469 return;
2470
2471 fc = header->frame_control;
2472 if (ieee80211_is_data(fc)) {
2473 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2474 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2475 memcpy((priv->tx_traffic +
2476 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2477 header, len);
2478 priv->tx_traffic_idx =
2479 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2480 }
2481 }
2482 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2483
2484 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2485 u16 length, struct ieee80211_hdr *header)
2486 {
2487 __le16 fc;
2488 u16 len;
2489
2490 if (likely(!(iwl_debug_level & IWL_DL_RX)))
2491 return;
2492
2493 if (!priv->rx_traffic)
2494 return;
2495
2496 fc = header->frame_control;
2497 if (ieee80211_is_data(fc)) {
2498 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2499 ? IWL_TRAFFIC_ENTRY_SIZE : length;
2500 memcpy((priv->rx_traffic +
2501 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2502 header, len);
2503 priv->rx_traffic_idx =
2504 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2505 }
2506 }
2507 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2508
2509 const char *get_mgmt_string(int cmd)
2510 {
2511 switch (cmd) {
2512 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2513 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2514 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2515 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2516 IWL_CMD(MANAGEMENT_PROBE_REQ);
2517 IWL_CMD(MANAGEMENT_PROBE_RESP);
2518 IWL_CMD(MANAGEMENT_BEACON);
2519 IWL_CMD(MANAGEMENT_ATIM);
2520 IWL_CMD(MANAGEMENT_DISASSOC);
2521 IWL_CMD(MANAGEMENT_AUTH);
2522 IWL_CMD(MANAGEMENT_DEAUTH);
2523 IWL_CMD(MANAGEMENT_ACTION);
2524 default:
2525 return "UNKNOWN";
2526
2527 }
2528 }
2529
2530 const char *get_ctrl_string(int cmd)
2531 {
2532 switch (cmd) {
2533 IWL_CMD(CONTROL_BACK_REQ);
2534 IWL_CMD(CONTROL_BACK);
2535 IWL_CMD(CONTROL_PSPOLL);
2536 IWL_CMD(CONTROL_RTS);
2537 IWL_CMD(CONTROL_CTS);
2538 IWL_CMD(CONTROL_ACK);
2539 IWL_CMD(CONTROL_CFEND);
2540 IWL_CMD(CONTROL_CFENDACK);
2541 default:
2542 return "UNKNOWN";
2543
2544 }
2545 }
2546
2547 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2548 {
2549 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2550 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2551 priv->led_tpt = 0;
2552 }
2553
2554 /*
2555 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2556 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2557 * Use debugFs to display the rx/rx_statistics
2558 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2559 * information will be recorded, but DATA pkt still will be recorded
2560 * for the reason of iwl_led.c need to control the led blinking based on
2561 * number of tx and rx data.
2562 *
2563 */
2564 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2565 {
2566 struct traffic_stats *stats;
2567
2568 if (is_tx)
2569 stats = &priv->tx_stats;
2570 else
2571 stats = &priv->rx_stats;
2572
2573 if (ieee80211_is_mgmt(fc)) {
2574 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2575 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2576 stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2577 break;
2578 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2579 stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2580 break;
2581 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2582 stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2583 break;
2584 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2585 stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2586 break;
2587 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2588 stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2589 break;
2590 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2591 stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2592 break;
2593 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2594 stats->mgmt[MANAGEMENT_BEACON]++;
2595 break;
2596 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2597 stats->mgmt[MANAGEMENT_ATIM]++;
2598 break;
2599 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2600 stats->mgmt[MANAGEMENT_DISASSOC]++;
2601 break;
2602 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2603 stats->mgmt[MANAGEMENT_AUTH]++;
2604 break;
2605 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2606 stats->mgmt[MANAGEMENT_DEAUTH]++;
2607 break;
2608 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2609 stats->mgmt[MANAGEMENT_ACTION]++;
2610 break;
2611 }
2612 } else if (ieee80211_is_ctl(fc)) {
2613 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2614 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2615 stats->ctrl[CONTROL_BACK_REQ]++;
2616 break;
2617 case cpu_to_le16(IEEE80211_STYPE_BACK):
2618 stats->ctrl[CONTROL_BACK]++;
2619 break;
2620 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2621 stats->ctrl[CONTROL_PSPOLL]++;
2622 break;
2623 case cpu_to_le16(IEEE80211_STYPE_RTS):
2624 stats->ctrl[CONTROL_RTS]++;
2625 break;
2626 case cpu_to_le16(IEEE80211_STYPE_CTS):
2627 stats->ctrl[CONTROL_CTS]++;
2628 break;
2629 case cpu_to_le16(IEEE80211_STYPE_ACK):
2630 stats->ctrl[CONTROL_ACK]++;
2631 break;
2632 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2633 stats->ctrl[CONTROL_CFEND]++;
2634 break;
2635 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2636 stats->ctrl[CONTROL_CFENDACK]++;
2637 break;
2638 }
2639 } else {
2640 /* data */
2641 stats->data_cnt++;
2642 stats->data_bytes += len;
2643 }
2644 iwl_leds_background(priv);
2645 }
2646 EXPORT_SYMBOL(iwl_update_stats);
2647 #endif
2648
2649 const static char *get_csr_string(int cmd)
2650 {
2651 switch (cmd) {
2652 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2653 IWL_CMD(CSR_INT_COALESCING);
2654 IWL_CMD(CSR_INT);
2655 IWL_CMD(CSR_INT_MASK);
2656 IWL_CMD(CSR_FH_INT_STATUS);
2657 IWL_CMD(CSR_GPIO_IN);
2658 IWL_CMD(CSR_RESET);
2659 IWL_CMD(CSR_GP_CNTRL);
2660 IWL_CMD(CSR_HW_REV);
2661 IWL_CMD(CSR_EEPROM_REG);
2662 IWL_CMD(CSR_EEPROM_GP);
2663 IWL_CMD(CSR_OTP_GP_REG);
2664 IWL_CMD(CSR_GIO_REG);
2665 IWL_CMD(CSR_GP_UCODE_REG);
2666 IWL_CMD(CSR_GP_DRIVER_REG);
2667 IWL_CMD(CSR_UCODE_DRV_GP1);
2668 IWL_CMD(CSR_UCODE_DRV_GP2);
2669 IWL_CMD(CSR_LED_REG);
2670 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2671 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2672 IWL_CMD(CSR_ANA_PLL_CFG);
2673 IWL_CMD(CSR_HW_REV_WA_REG);
2674 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2675 default:
2676 return "UNKNOWN";
2677
2678 }
2679 }
2680
2681 void iwl_dump_csr(struct iwl_priv *priv)
2682 {
2683 int i;
2684 u32 csr_tbl[] = {
2685 CSR_HW_IF_CONFIG_REG,
2686 CSR_INT_COALESCING,
2687 CSR_INT,
2688 CSR_INT_MASK,
2689 CSR_FH_INT_STATUS,
2690 CSR_GPIO_IN,
2691 CSR_RESET,
2692 CSR_GP_CNTRL,
2693 CSR_HW_REV,
2694 CSR_EEPROM_REG,
2695 CSR_EEPROM_GP,
2696 CSR_OTP_GP_REG,
2697 CSR_GIO_REG,
2698 CSR_GP_UCODE_REG,
2699 CSR_GP_DRIVER_REG,
2700 CSR_UCODE_DRV_GP1,
2701 CSR_UCODE_DRV_GP2,
2702 CSR_LED_REG,
2703 CSR_DRAM_INT_TBL_REG,
2704 CSR_GIO_CHICKEN_BITS,
2705 CSR_ANA_PLL_CFG,
2706 CSR_HW_REV_WA_REG,
2707 CSR_DBG_HPET_MEM_REG
2708 };
2709 IWL_ERR(priv, "CSR values:\n");
2710 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2711 "CSR_INT_PERIODIC_REG)\n");
2712 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2713 IWL_ERR(priv, " %25s: 0X%08x\n",
2714 get_csr_string(csr_tbl[i]),
2715 iwl_read32(priv, csr_tbl[i]));
2716 }
2717 }
2718 EXPORT_SYMBOL(iwl_dump_csr);
2719
2720 const static char *get_fh_string(int cmd)
2721 {
2722 switch (cmd) {
2723 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2724 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2725 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2726 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2727 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2728 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2729 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2730 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2731 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2732 default:
2733 return "UNKNOWN";
2734
2735 }
2736 }
2737
2738 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2739 {
2740 int i;
2741 #ifdef CONFIG_IWLWIFI_DEBUG
2742 int pos = 0;
2743 size_t bufsz = 0;
2744 #endif
2745 u32 fh_tbl[] = {
2746 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2747 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2748 FH_RSCSR_CHNL0_WPTR,
2749 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2750 FH_MEM_RSSR_SHARED_CTRL_REG,
2751 FH_MEM_RSSR_RX_STATUS_REG,
2752 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2753 FH_TSSR_TX_STATUS_REG,
2754 FH_TSSR_TX_ERROR_REG
2755 };
2756 #ifdef CONFIG_IWLWIFI_DEBUG
2757 if (display) {
2758 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2759 *buf = kmalloc(bufsz, GFP_KERNEL);
2760 if (!*buf)
2761 return -ENOMEM;
2762 pos += scnprintf(*buf + pos, bufsz - pos,
2763 "FH register values:\n");
2764 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2765 pos += scnprintf(*buf + pos, bufsz - pos,
2766 " %34s: 0X%08x\n",
2767 get_fh_string(fh_tbl[i]),
2768 iwl_read_direct32(priv, fh_tbl[i]));
2769 }
2770 return pos;
2771 }
2772 #endif
2773 IWL_ERR(priv, "FH register values:\n");
2774 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2775 IWL_ERR(priv, " %34s: 0X%08x\n",
2776 get_fh_string(fh_tbl[i]),
2777 iwl_read_direct32(priv, fh_tbl[i]));
2778 }
2779 return 0;
2780 }
2781 EXPORT_SYMBOL(iwl_dump_fh);
2782
2783 static void iwl_force_rf_reset(struct iwl_priv *priv)
2784 {
2785 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2786 return;
2787
2788 if (!iwl_is_associated(priv)) {
2789 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2790 return;
2791 }
2792 /*
2793 * There is no easy and better way to force reset the radio,
2794 * the only known method is switching channel which will force to
2795 * reset and tune the radio.
2796 * Use internal short scan (single channel) operation to should
2797 * achieve this objective.
2798 * Driver should reset the radio when number of consecutive missed
2799 * beacon, or any other uCode error condition detected.
2800 */
2801 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2802 iwl_internal_short_hw_scan(priv);
2803 return;
2804 }
2805
2806
2807 int iwl_force_reset(struct iwl_priv *priv, int mode)
2808 {
2809 struct iwl_force_reset *force_reset;
2810
2811 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2812 return -EINVAL;
2813
2814 if (mode >= IWL_MAX_FORCE_RESET) {
2815 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2816 return -EINVAL;
2817 }
2818 force_reset = &priv->force_reset[mode];
2819 force_reset->reset_request_count++;
2820 if (force_reset->last_force_reset_jiffies &&
2821 time_after(force_reset->last_force_reset_jiffies +
2822 force_reset->reset_duration, jiffies)) {
2823 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2824 force_reset->reset_reject_count++;
2825 return -EAGAIN;
2826 }
2827 force_reset->reset_success_count++;
2828 force_reset->last_force_reset_jiffies = jiffies;
2829 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2830 switch (mode) {
2831 case IWL_RF_RESET:
2832 iwl_force_rf_reset(priv);
2833 break;
2834 case IWL_FW_RESET:
2835 IWL_ERR(priv, "On demand firmware reload\n");
2836 /* Set the FW error flag -- cleared on iwl_down */
2837 set_bit(STATUS_FW_ERROR, &priv->status);
2838 wake_up_interruptible(&priv->wait_command_queue);
2839 /*
2840 * Keep the restart process from trying to send host
2841 * commands by clearing the INIT status bit
2842 */
2843 clear_bit(STATUS_READY, &priv->status);
2844 queue_work(priv->workqueue, &priv->restart);
2845 break;
2846 }
2847 return 0;
2848 }
2849 EXPORT_SYMBOL(iwl_force_reset);
2850
2851 /**
2852 * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2853 *
2854 * During normal condition (no queue is stuck), the timer is continually set to
2855 * execute every monitor_recover_period milliseconds after the last timer
2856 * expired. When the queue read_ptr is at the same place, the timer is
2857 * shorten to 100mSecs. This is
2858 * 1) to reduce the chance that the read_ptr may wrap around (not stuck)
2859 * 2) to detect the stuck queues quicker before the station and AP can
2860 * disassociate each other.
2861 *
2862 * This function monitors all the tx queues and recover from it if any
2863 * of the queues are stuck.
2864 * 1. It first check the cmd queue for stuck conditions. If it is stuck,
2865 * it will recover by resetting the firmware and return.
2866 * 2. Then, it checks for station association. If it associates it will check
2867 * other queues. If any queue is stuck, it will recover by resetting
2868 * the firmware.
2869 * Note: It the number of times the queue read_ptr to be at the same place to
2870 * be MAX_REPEAT+1 in order to consider to be stuck.
2871 */
2872 /*
2873 * The maximum number of times the read pointer of the tx queue at the
2874 * same place without considering to be stuck.
2875 */
2876 #define MAX_REPEAT (2)
2877 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2878 {
2879 struct iwl_tx_queue *txq;
2880 struct iwl_queue *q;
2881
2882 txq = &priv->txq[cnt];
2883 q = &txq->q;
2884 /* queue is empty, skip */
2885 if (q->read_ptr != q->write_ptr) {
2886 if (q->read_ptr == q->last_read_ptr) {
2887 /* a queue has not been read from last time */
2888 if (q->repeat_same_read_ptr > MAX_REPEAT) {
2889 IWL_ERR(priv,
2890 "queue %d stuck %d time. Fw reload.\n",
2891 q->id, q->repeat_same_read_ptr);
2892 q->repeat_same_read_ptr = 0;
2893 iwl_force_reset(priv, IWL_FW_RESET);
2894 } else {
2895 q->repeat_same_read_ptr++;
2896 IWL_DEBUG_RADIO(priv,
2897 "queue %d, not read %d time\n",
2898 q->id,
2899 q->repeat_same_read_ptr);
2900 mod_timer(&priv->monitor_recover, jiffies +
2901 msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2902 }
2903 return 1;
2904 } else {
2905 q->last_read_ptr = q->read_ptr;
2906 q->repeat_same_read_ptr = 0;
2907 }
2908 }
2909 return 0;
2910 }
2911
2912 void iwl_bg_monitor_recover(unsigned long data)
2913 {
2914 struct iwl_priv *priv = (struct iwl_priv *)data;
2915 int cnt;
2916
2917 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2918 return;
2919
2920 /* monitor and check for stuck cmd queue */
2921 if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2922 return;
2923
2924 /* monitor and check for other stuck queues */
2925 if (iwl_is_associated(priv)) {
2926 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2927 /* skip as we already checked the command queue */
2928 if (cnt == IWL_CMD_QUEUE_NUM)
2929 continue;
2930 if (iwl_check_stuck_queue(priv, cnt))
2931 return;
2932 }
2933 }
2934 /*
2935 * Reschedule the timer to occur in
2936 * priv->cfg->monitor_recover_period
2937 */
2938 mod_timer(&priv->monitor_recover,
2939 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2940 }
2941 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2942
2943 #ifdef CONFIG_PM
2944
2945 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2946 {
2947 struct iwl_priv *priv = pci_get_drvdata(pdev);
2948
2949 /*
2950 * This function is called when system goes into suspend state
2951 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2952 * first but since iwl_mac_stop() has no knowledge of who the caller is,
2953 * it will not call apm_ops.stop() to stop the DMA operation.
2954 * Calling apm_ops.stop here to make sure we stop the DMA.
2955 */
2956 priv->cfg->ops->lib->apm_ops.stop(priv);
2957
2958 pci_save_state(pdev);
2959 pci_disable_device(pdev);
2960 pci_set_power_state(pdev, PCI_D3hot);
2961
2962 return 0;
2963 }
2964 EXPORT_SYMBOL(iwl_pci_suspend);
2965
2966 int iwl_pci_resume(struct pci_dev *pdev)
2967 {
2968 struct iwl_priv *priv = pci_get_drvdata(pdev);
2969 int ret;
2970
2971 pci_set_power_state(pdev, PCI_D0);
2972 ret = pci_enable_device(pdev);
2973 if (ret)
2974 return ret;
2975 pci_restore_state(pdev);
2976 iwl_enable_interrupts(priv);
2977
2978 return 0;
2979 }
2980 EXPORT_SYMBOL(iwl_pci_resume);
2981
2982 #endif /* CONFIG_PM */
Linux kernel - Deliverables
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