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1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/version.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/dma-mapping.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/wireless.h> | |
37 | #include <net/mac80211.h> | |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/etherdevice.h> | |
40 | #include <linux/delay.h> | |
41 | ||
42 | #include "iwlwifi.h" | |
43 | #include "iwl-4965.h" | |
44 | #include "iwl-helpers.h" | |
45 | ||
46 | #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ | |
47 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
48 | IWL_RATE_SISO_##s##M_PLCP, \ | |
49 | IWL_RATE_MIMO_##s##M_PLCP, \ | |
50 | IWL_RATE_##r##M_IEEE, \ | |
51 | IWL_RATE_##ip##M_INDEX, \ | |
52 | IWL_RATE_##in##M_INDEX, \ | |
53 | IWL_RATE_##rp##M_INDEX, \ | |
54 | IWL_RATE_##rn##M_INDEX, \ | |
55 | IWL_RATE_##pp##M_INDEX, \ | |
56 | IWL_RATE_##np##M_INDEX } | |
57 | ||
58 | /* | |
59 | * Parameter order: | |
60 | * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate | |
61 | * | |
62 | * If there isn't a valid next or previous rate then INV is used which | |
63 | * maps to IWL_RATE_INVALID | |
64 | * | |
65 | */ | |
66 | const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
67 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ | |
68 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ | |
69 | IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ | |
70 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ | |
71 | IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ | |
72 | IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ | |
73 | IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ | |
74 | IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ | |
75 | IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ | |
76 | IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ | |
77 | IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ | |
78 | IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ | |
79 | IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ | |
80 | }; | |
81 | ||
82 | static int is_fat_channel(__le32 rxon_flags) | |
83 | { | |
84 | return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) || | |
85 | (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK); | |
86 | } | |
87 | ||
88 | static u8 is_single_stream(struct iwl_priv *priv) | |
89 | { | |
90 | #ifdef CONFIG_IWLWIFI_HT | |
91 | if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht || | |
92 | (priv->active_rate_ht[1] == 0) || | |
93 | (priv->ps_mode == IWL_MIMO_PS_STATIC)) | |
94 | return 1; | |
95 | #else | |
96 | return 1; | |
97 | #endif /*CONFIG_IWLWIFI_HT */ | |
98 | return 0; | |
99 | } | |
100 | ||
101 | /* | |
102 | * Determine how many receiver/antenna chains to use. | |
103 | * More provides better reception via diversity. Fewer saves power. | |
104 | * MIMO (dual stream) requires at least 2, but works better with 3. | |
105 | * This does not determine *which* chains to use, just how many. | |
106 | */ | |
107 | static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv, | |
108 | u8 *idle_state, u8 *rx_state) | |
109 | { | |
110 | u8 is_single = is_single_stream(priv); | |
111 | u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1; | |
112 | ||
113 | /* # of Rx chains to use when expecting MIMO. */ | |
114 | if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC))) | |
115 | *rx_state = 2; | |
116 | else | |
117 | *rx_state = 3; | |
118 | ||
119 | /* # Rx chains when idling and maybe trying to save power */ | |
120 | switch (priv->ps_mode) { | |
121 | case IWL_MIMO_PS_STATIC: | |
122 | case IWL_MIMO_PS_DYNAMIC: | |
123 | *idle_state = (is_cam) ? 2 : 1; | |
124 | break; | |
125 | case IWL_MIMO_PS_NONE: | |
126 | *idle_state = (is_cam) ? *rx_state : 1; | |
127 | break; | |
128 | default: | |
129 | *idle_state = 1; | |
130 | break; | |
131 | } | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | int iwl_hw_rxq_stop(struct iwl_priv *priv) | |
137 | { | |
138 | int rc; | |
139 | unsigned long flags; | |
140 | ||
141 | spin_lock_irqsave(&priv->lock, flags); | |
142 | rc = iwl_grab_restricted_access(priv); | |
143 | if (rc) { | |
144 | spin_unlock_irqrestore(&priv->lock, flags); | |
145 | return rc; | |
146 | } | |
147 | ||
148 | /* stop HW */ | |
149 | iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); | |
150 | rc = iwl_poll_restricted_bit(priv, FH_MEM_RSSR_RX_STATUS_REG, | |
151 | (1 << 24), 1000); | |
152 | if (rc < 0) | |
153 | IWL_ERROR("Can't stop Rx DMA.\n"); | |
154 | ||
155 | iwl_release_restricted_access(priv); | |
156 | spin_unlock_irqrestore(&priv->lock, flags); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | u8 iwl_hw_find_station(struct iwl_priv *priv, const u8 *addr) | |
162 | { | |
163 | int i; | |
164 | int start = 0; | |
165 | int ret = IWL_INVALID_STATION; | |
166 | unsigned long flags; | |
167 | ||
168 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) || | |
169 | (priv->iw_mode == IEEE80211_IF_TYPE_AP)) | |
170 | start = IWL_STA_ID; | |
171 | ||
172 | if (is_broadcast_ether_addr(addr)) | |
173 | return IWL4965_BROADCAST_ID; | |
174 | ||
175 | spin_lock_irqsave(&priv->sta_lock, flags); | |
176 | for (i = start; i < priv->hw_setting.max_stations; i++) | |
177 | if ((priv->stations[i].used) && | |
178 | (!compare_ether_addr | |
179 | (priv->stations[i].sta.sta.addr, addr))) { | |
180 | ret = i; | |
181 | goto out; | |
182 | } | |
183 | ||
184 | IWL_DEBUG_ASSOC("can not find STA " MAC_FMT " total %d\n", | |
185 | MAC_ARG(addr), priv->num_stations); | |
186 | ||
187 | out: | |
188 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
189 | return ret; | |
190 | } | |
191 | ||
192 | static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max) | |
193 | { | |
194 | int rc = 0; | |
195 | unsigned long flags; | |
196 | ||
197 | spin_lock_irqsave(&priv->lock, flags); | |
198 | rc = iwl_grab_restricted_access(priv); | |
199 | if (rc) { | |
200 | spin_unlock_irqrestore(&priv->lock, flags); | |
201 | return rc; | |
202 | } | |
203 | ||
204 | if (!pwr_max) { | |
205 | u32 val; | |
206 | ||
207 | rc = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE, | |
208 | &val); | |
209 | ||
210 | if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) | |
211 | iwl_set_bits_mask_restricted_reg( | |
212 | priv, APMG_PS_CTRL_REG, | |
213 | APMG_PS_CTRL_VAL_PWR_SRC_VAUX, | |
214 | ~APMG_PS_CTRL_MSK_PWR_SRC); | |
215 | } else | |
216 | iwl_set_bits_mask_restricted_reg( | |
217 | priv, APMG_PS_CTRL_REG, | |
218 | APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, | |
219 | ~APMG_PS_CTRL_MSK_PWR_SRC); | |
220 | ||
221 | iwl_release_restricted_access(priv); | |
222 | spin_unlock_irqrestore(&priv->lock, flags); | |
223 | ||
224 | return rc; | |
225 | } | |
226 | ||
227 | static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq) | |
228 | { | |
229 | int rc; | |
230 | unsigned long flags; | |
231 | ||
232 | spin_lock_irqsave(&priv->lock, flags); | |
233 | rc = iwl_grab_restricted_access(priv); | |
234 | if (rc) { | |
235 | spin_unlock_irqrestore(&priv->lock, flags); | |
236 | return rc; | |
237 | } | |
238 | ||
239 | /* stop HW */ | |
240 | iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); | |
241 | ||
242 | iwl_write_restricted(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); | |
243 | iwl_write_restricted(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, | |
244 | rxq->dma_addr >> 8); | |
245 | ||
246 | iwl_write_restricted(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, | |
247 | (priv->hw_setting.shared_phys + | |
248 | offsetof(struct iwl_shared, val0)) >> 4); | |
249 | ||
250 | iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, | |
251 | FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | | |
252 | FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | | |
253 | IWL_FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K | | |
254 | /*0x10 << 4 | */ | |
255 | (RX_QUEUE_SIZE_LOG << | |
256 | FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT)); | |
257 | ||
258 | /* | |
259 | * iwl_write32(priv,CSR_INT_COAL_REG,0); | |
260 | */ | |
261 | ||
262 | iwl_release_restricted_access(priv); | |
263 | spin_unlock_irqrestore(&priv->lock, flags); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static int iwl4965_kw_init(struct iwl_priv *priv) | |
269 | { | |
270 | unsigned long flags; | |
271 | int rc; | |
272 | ||
273 | spin_lock_irqsave(&priv->lock, flags); | |
274 | rc = iwl_grab_restricted_access(priv); | |
275 | if (rc) | |
276 | goto out; | |
277 | ||
278 | iwl_write_restricted(priv, IWL_FH_KW_MEM_ADDR_REG, | |
279 | priv->kw.dma_addr >> 4); | |
280 | iwl_release_restricted_access(priv); | |
281 | out: | |
282 | spin_unlock_irqrestore(&priv->lock, flags); | |
283 | return rc; | |
284 | } | |
285 | ||
286 | static int iwl4965_kw_alloc(struct iwl_priv *priv) | |
287 | { | |
288 | struct pci_dev *dev = priv->pci_dev; | |
289 | struct iwl_kw *kw = &priv->kw; | |
290 | ||
291 | kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */ | |
292 | kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr); | |
293 | if (!kw->v_addr) | |
294 | return -ENOMEM; | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \ | |
300 | ? # x " " : "") | |
301 | ||
302 | int iwl4965_set_fat_chan_info(struct iwl_priv *priv, int phymode, u16 channel, | |
303 | const struct iwl_eeprom_channel *eeprom_ch, | |
304 | u8 fat_extension_channel) | |
305 | { | |
306 | struct iwl_channel_info *ch_info; | |
307 | ||
308 | ch_info = (struct iwl_channel_info *) | |
309 | iwl_get_channel_info(priv, phymode, channel); | |
310 | ||
311 | if (!is_channel_valid(ch_info)) | |
312 | return -1; | |
313 | ||
314 | IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x" | |
315 | " %ddBm): Ad-Hoc %ssupported\n", | |
316 | ch_info->channel, | |
317 | is_channel_a_band(ch_info) ? | |
318 | "5.2" : "2.4", | |
319 | CHECK_AND_PRINT(IBSS), | |
320 | CHECK_AND_PRINT(ACTIVE), | |
321 | CHECK_AND_PRINT(RADAR), | |
322 | CHECK_AND_PRINT(WIDE), | |
323 | CHECK_AND_PRINT(NARROW), | |
324 | CHECK_AND_PRINT(DFS), | |
325 | eeprom_ch->flags, | |
326 | eeprom_ch->max_power_avg, | |
327 | ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) | |
328 | && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? | |
329 | "" : "not "); | |
330 | ||
331 | ch_info->fat_eeprom = *eeprom_ch; | |
332 | ch_info->fat_max_power_avg = eeprom_ch->max_power_avg; | |
333 | ch_info->fat_curr_txpow = eeprom_ch->max_power_avg; | |
334 | ch_info->fat_min_power = 0; | |
335 | ch_info->fat_scan_power = eeprom_ch->max_power_avg; | |
336 | ch_info->fat_flags = eeprom_ch->flags; | |
337 | ch_info->fat_extension_channel = fat_extension_channel; | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static void iwl4965_kw_free(struct iwl_priv *priv) | |
343 | { | |
344 | struct pci_dev *dev = priv->pci_dev; | |
345 | struct iwl_kw *kw = &priv->kw; | |
346 | ||
347 | if (kw->v_addr) { | |
348 | pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr); | |
349 | memset(kw, 0, sizeof(*kw)); | |
350 | } | |
351 | } | |
352 | ||
353 | /** | |
354 | * iwl4965_txq_ctx_reset - Reset TX queue context | |
355 | * Destroys all DMA structures and initialise them again | |
356 | * | |
357 | * @param priv | |
358 | * @return error code | |
359 | */ | |
360 | static int iwl4965_txq_ctx_reset(struct iwl_priv *priv) | |
361 | { | |
362 | int rc = 0; | |
363 | int txq_id, slots_num; | |
364 | unsigned long flags; | |
365 | ||
366 | iwl4965_kw_free(priv); | |
367 | ||
368 | iwl_hw_txq_ctx_free(priv); | |
369 | ||
370 | /* Tx CMD queue */ | |
371 | rc = iwl4965_kw_alloc(priv); | |
372 | if (rc) { | |
373 | IWL_ERROR("Keep Warm allocation failed"); | |
374 | goto error_kw; | |
375 | } | |
376 | ||
377 | spin_lock_irqsave(&priv->lock, flags); | |
378 | ||
379 | rc = iwl_grab_restricted_access(priv); | |
380 | if (unlikely(rc)) { | |
381 | IWL_ERROR("TX reset failed"); | |
382 | spin_unlock_irqrestore(&priv->lock, flags); | |
383 | goto error_reset; | |
384 | } | |
385 | ||
386 | iwl_write_restricted_reg(priv, SCD_TXFACT, 0); | |
387 | iwl_release_restricted_access(priv); | |
388 | spin_unlock_irqrestore(&priv->lock, flags); | |
389 | ||
390 | rc = iwl4965_kw_init(priv); | |
391 | if (rc) { | |
392 | IWL_ERROR("kw_init failed\n"); | |
393 | goto error_reset; | |
394 | } | |
395 | ||
396 | /* Tx queue(s) */ | |
397 | for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) { | |
398 | slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ? | |
399 | TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; | |
400 | rc = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num, | |
401 | txq_id); | |
402 | if (rc) { | |
403 | IWL_ERROR("Tx %d queue init failed\n", txq_id); | |
404 | goto error; | |
405 | } | |
406 | } | |
407 | ||
408 | return rc; | |
409 | ||
410 | error: | |
411 | iwl_hw_txq_ctx_free(priv); | |
412 | error_reset: | |
413 | iwl4965_kw_free(priv); | |
414 | error_kw: | |
415 | return rc; | |
416 | } | |
417 | ||
418 | int iwl_hw_nic_init(struct iwl_priv *priv) | |
419 | { | |
420 | int rc; | |
421 | unsigned long flags; | |
422 | struct iwl_rx_queue *rxq = &priv->rxq; | |
423 | u8 rev_id; | |
424 | u32 val; | |
425 | u8 val_link; | |
426 | ||
427 | iwl_power_init_handle(priv); | |
428 | ||
429 | /* nic_init */ | |
430 | spin_lock_irqsave(&priv->lock, flags); | |
431 | ||
432 | iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS, | |
433 | CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); | |
434 | ||
435 | iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); | |
436 | rc = iwl_poll_bit(priv, CSR_GP_CNTRL, | |
437 | CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, | |
438 | CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); | |
439 | if (rc < 0) { | |
440 | spin_unlock_irqrestore(&priv->lock, flags); | |
441 | IWL_DEBUG_INFO("Failed to init the card\n"); | |
442 | return rc; | |
443 | } | |
444 | ||
445 | rc = iwl_grab_restricted_access(priv); | |
446 | if (rc) { | |
447 | spin_unlock_irqrestore(&priv->lock, flags); | |
448 | return rc; | |
449 | } | |
450 | ||
451 | iwl_read_restricted_reg(priv, APMG_CLK_CTRL_REG); | |
452 | ||
453 | iwl_write_restricted_reg(priv, APMG_CLK_CTRL_REG, | |
454 | APMG_CLK_VAL_DMA_CLK_RQT | | |
455 | APMG_CLK_VAL_BSM_CLK_RQT); | |
456 | iwl_read_restricted_reg(priv, APMG_CLK_CTRL_REG); | |
457 | ||
458 | udelay(20); | |
459 | ||
460 | iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG, | |
461 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); | |
462 | ||
463 | iwl_release_restricted_access(priv); | |
464 | iwl_write32(priv, CSR_INT_COALESCING, 512 / 32); | |
465 | spin_unlock_irqrestore(&priv->lock, flags); | |
466 | ||
467 | /* Determine HW type */ | |
468 | rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id); | |
469 | if (rc) | |
470 | return rc; | |
471 | ||
472 | IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id); | |
473 | ||
474 | iwl4965_nic_set_pwr_src(priv, 1); | |
475 | spin_lock_irqsave(&priv->lock, flags); | |
476 | ||
477 | if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) { | |
478 | pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val); | |
479 | /* Enable No Snoop field */ | |
480 | pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8, | |
481 | val & ~(1 << 11)); | |
482 | } | |
483 | ||
484 | spin_unlock_irqrestore(&priv->lock, flags); | |
485 | ||
486 | /* Read the EEPROM */ | |
487 | rc = iwl_eeprom_init(priv); | |
488 | if (rc) | |
489 | return rc; | |
490 | ||
491 | if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) { | |
492 | IWL_ERROR("Older EEPROM detected! Aborting.\n"); | |
493 | return -EINVAL; | |
494 | } | |
495 | ||
496 | pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link); | |
497 | ||
498 | /* disable L1 entry -- workaround for pre-B1 */ | |
499 | pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02); | |
500 | ||
501 | spin_lock_irqsave(&priv->lock, flags); | |
502 | ||
503 | /* set CSR_HW_CONFIG_REG for uCode use */ | |
504 | ||
505 | iwl_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R | | |
506 | CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI | | |
507 | CSR_HW_IF_CONFIG_REG_BIT_MAC_SI); | |
508 | ||
509 | rc = iwl_grab_restricted_access(priv); | |
510 | if (rc < 0) { | |
511 | spin_unlock_irqrestore(&priv->lock, flags); | |
512 | IWL_DEBUG_INFO("Failed to init the card\n"); | |
513 | return rc; | |
514 | } | |
515 | ||
516 | iwl_read_restricted_reg(priv, APMG_PS_CTRL_REG); | |
517 | iwl_set_bits_restricted_reg(priv, APMG_PS_CTRL_REG, | |
518 | APMG_PS_CTRL_VAL_RESET_REQ); | |
519 | udelay(5); | |
520 | iwl_clear_bits_restricted_reg(priv, APMG_PS_CTRL_REG, | |
521 | APMG_PS_CTRL_VAL_RESET_REQ); | |
522 | ||
523 | iwl_release_restricted_access(priv); | |
524 | spin_unlock_irqrestore(&priv->lock, flags); | |
525 | ||
526 | iwl_hw_card_show_info(priv); | |
527 | ||
528 | /* end nic_init */ | |
529 | ||
530 | /* Allocate the RX queue, or reset if it is already allocated */ | |
531 | if (!rxq->bd) { | |
532 | rc = iwl_rx_queue_alloc(priv); | |
533 | if (rc) { | |
534 | IWL_ERROR("Unable to initialize Rx queue\n"); | |
535 | return -ENOMEM; | |
536 | } | |
537 | } else | |
538 | iwl_rx_queue_reset(priv, rxq); | |
539 | ||
540 | iwl_rx_replenish(priv); | |
541 | ||
542 | iwl4965_rx_init(priv, rxq); | |
543 | ||
544 | spin_lock_irqsave(&priv->lock, flags); | |
545 | ||
546 | rxq->need_update = 1; | |
547 | iwl_rx_queue_update_write_ptr(priv, rxq); | |
548 | ||
549 | spin_unlock_irqrestore(&priv->lock, flags); | |
550 | rc = iwl4965_txq_ctx_reset(priv); | |
551 | if (rc) | |
552 | return rc; | |
553 | ||
554 | if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE) | |
555 | IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n"); | |
556 | ||
557 | if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE) | |
558 | IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n"); | |
559 | ||
560 | set_bit(STATUS_INIT, &priv->status); | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
565 | int iwl_hw_nic_stop_master(struct iwl_priv *priv) | |
566 | { | |
567 | int rc = 0; | |
568 | u32 reg_val; | |
569 | unsigned long flags; | |
570 | ||
571 | spin_lock_irqsave(&priv->lock, flags); | |
572 | ||
573 | /* set stop master bit */ | |
574 | iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); | |
575 | ||
576 | reg_val = iwl_read32(priv, CSR_GP_CNTRL); | |
577 | ||
578 | if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE == | |
579 | (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE)) | |
580 | IWL_DEBUG_INFO("Card in power save, master is already " | |
581 | "stopped\n"); | |
582 | else { | |
583 | rc = iwl_poll_bit(priv, CSR_RESET, | |
584 | CSR_RESET_REG_FLAG_MASTER_DISABLED, | |
585 | CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); | |
586 | if (rc < 0) { | |
587 | spin_unlock_irqrestore(&priv->lock, flags); | |
588 | return rc; | |
589 | } | |
590 | } | |
591 | ||
592 | spin_unlock_irqrestore(&priv->lock, flags); | |
593 | IWL_DEBUG_INFO("stop master\n"); | |
594 | ||
595 | return rc; | |
596 | } | |
597 | ||
598 | void iwl_hw_txq_ctx_stop(struct iwl_priv *priv) | |
599 | { | |
600 | ||
601 | int txq_id; | |
602 | unsigned long flags; | |
603 | ||
604 | /* reset TFD queues */ | |
605 | for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) { | |
606 | spin_lock_irqsave(&priv->lock, flags); | |
607 | if (iwl_grab_restricted_access(priv)) { | |
608 | spin_unlock_irqrestore(&priv->lock, flags); | |
609 | continue; | |
610 | } | |
611 | ||
612 | iwl_write_restricted(priv, | |
613 | IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), | |
614 | 0x0); | |
615 | iwl_poll_restricted_bit(priv, IWL_FH_TSSR_TX_STATUS_REG, | |
616 | IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE | |
617 | (txq_id), 200); | |
618 | iwl_release_restricted_access(priv); | |
619 | spin_unlock_irqrestore(&priv->lock, flags); | |
620 | } | |
621 | ||
622 | iwl_hw_txq_ctx_free(priv); | |
623 | } | |
624 | ||
625 | int iwl_hw_nic_reset(struct iwl_priv *priv) | |
626 | { | |
627 | int rc = 0; | |
628 | unsigned long flags; | |
629 | ||
630 | iwl_hw_nic_stop_master(priv); | |
631 | ||
632 | spin_lock_irqsave(&priv->lock, flags); | |
633 | ||
634 | iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); | |
635 | ||
636 | udelay(10); | |
637 | ||
638 | iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); | |
639 | rc = iwl_poll_bit(priv, CSR_RESET, | |
640 | CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, | |
641 | CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25); | |
642 | ||
643 | udelay(10); | |
644 | ||
645 | rc = iwl_grab_restricted_access(priv); | |
646 | if (!rc) { | |
647 | iwl_write_restricted_reg(priv, APMG_CLK_EN_REG, | |
648 | APMG_CLK_VAL_DMA_CLK_RQT | | |
649 | APMG_CLK_VAL_BSM_CLK_RQT); | |
650 | ||
651 | udelay(10); | |
652 | ||
653 | iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG, | |
654 | APMG_PCIDEV_STT_VAL_L1_ACT_DIS); | |
655 | ||
656 | iwl_release_restricted_access(priv); | |
657 | } | |
658 | ||
659 | clear_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
660 | wake_up_interruptible(&priv->wait_command_queue); | |
661 | ||
662 | spin_unlock_irqrestore(&priv->lock, flags); | |
663 | ||
664 | return rc; | |
665 | ||
666 | } | |
667 | ||
668 | #define REG_RECALIB_PERIOD (60) | |
669 | ||
670 | /** | |
671 | * iwl4965_bg_statistics_periodic - Timer callback to queue statistics | |
672 | * | |
673 | * This callback is provided in order to queue the statistics_work | |
674 | * in work_queue context (v. softirq) | |
675 | * | |
676 | * This timer function is continually reset to execute within | |
677 | * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION | |
678 | * was received. We need to ensure we receive the statistics in order | |
679 | * to update the temperature used for calibrating the TXPOWER. However, | |
680 | * we can't send the statistics command from softirq context (which | |
681 | * is the context which timers run at) so we have to queue off the | |
682 | * statistics_work to actually send the command to the hardware. | |
683 | */ | |
684 | static void iwl4965_bg_statistics_periodic(unsigned long data) | |
685 | { | |
686 | struct iwl_priv *priv = (struct iwl_priv *)data; | |
687 | ||
688 | queue_work(priv->workqueue, &priv->statistics_work); | |
689 | } | |
690 | ||
691 | /** | |
692 | * iwl4965_bg_statistics_work - Send the statistics request to the hardware. | |
693 | * | |
694 | * This is queued by iwl_bg_statistics_periodic. | |
695 | */ | |
696 | static void iwl4965_bg_statistics_work(struct work_struct *work) | |
697 | { | |
698 | struct iwl_priv *priv = container_of(work, struct iwl_priv, | |
699 | statistics_work); | |
700 | ||
701 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
702 | return; | |
703 | ||
704 | mutex_lock(&priv->mutex); | |
705 | iwl_send_statistics_request(priv); | |
706 | mutex_unlock(&priv->mutex); | |
707 | } | |
708 | ||
709 | #define CT_LIMIT_CONST 259 | |
710 | #define TM_CT_KILL_THRESHOLD 110 | |
711 | ||
712 | void iwl4965_rf_kill_ct_config(struct iwl_priv *priv) | |
713 | { | |
714 | struct iwl_ct_kill_config cmd; | |
715 | u32 R1, R2, R3; | |
716 | u32 temp_th; | |
717 | u32 crit_temperature; | |
718 | unsigned long flags; | |
719 | int rc = 0; | |
720 | ||
721 | spin_lock_irqsave(&priv->lock, flags); | |
722 | iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, | |
723 | CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); | |
724 | spin_unlock_irqrestore(&priv->lock, flags); | |
725 | ||
726 | if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) { | |
727 | R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]); | |
728 | R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]); | |
729 | R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]); | |
730 | } else { | |
731 | R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]); | |
732 | R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]); | |
733 | R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]); | |
734 | } | |
735 | ||
736 | temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD); | |
737 | ||
738 | crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2; | |
739 | cmd.critical_temperature_R = cpu_to_le32(crit_temperature); | |
740 | rc = iwl_send_cmd_pdu(priv, | |
741 | REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd); | |
742 | if (rc) | |
743 | IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n"); | |
744 | else | |
745 | IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n"); | |
746 | } | |
747 | ||
748 | #ifdef CONFIG_IWLWIFI_SENSITIVITY | |
749 | ||
750 | /* "false alarms" are signals that our DSP tries to lock onto, | |
751 | * but then determines that they are either noise, or transmissions | |
752 | * from a distant wireless network (also "noise", really) that get | |
753 | * "stepped on" by stronger transmissions within our own network. | |
754 | * This algorithm attempts to set a sensitivity level that is high | |
755 | * enough to receive all of our own network traffic, but not so | |
756 | * high that our DSP gets too busy trying to lock onto non-network | |
757 | * activity/noise. */ | |
758 | static int iwl4965_sens_energy_cck(struct iwl_priv *priv, | |
759 | u32 norm_fa, | |
760 | u32 rx_enable_time, | |
761 | struct statistics_general_data *rx_info) | |
762 | { | |
763 | u32 max_nrg_cck = 0; | |
764 | int i = 0; | |
765 | u8 max_silence_rssi = 0; | |
766 | u32 silence_ref = 0; | |
767 | u8 silence_rssi_a = 0; | |
768 | u8 silence_rssi_b = 0; | |
769 | u8 silence_rssi_c = 0; | |
770 | u32 val; | |
771 | ||
772 | /* "false_alarms" values below are cross-multiplications to assess the | |
773 | * numbers of false alarms within the measured period of actual Rx | |
774 | * (Rx is off when we're txing), vs the min/max expected false alarms | |
775 | * (some should be expected if rx is sensitive enough) in a | |
776 | * hypothetical listening period of 200 time units (TU), 204.8 msec: | |
777 | * | |
778 | * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time | |
779 | * | |
780 | * */ | |
781 | u32 false_alarms = norm_fa * 200 * 1024; | |
782 | u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; | |
783 | u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; | |
784 | struct iwl_sensitivity_data *data = NULL; | |
785 | ||
786 | data = &(priv->sensitivity_data); | |
787 | ||
788 | data->nrg_auto_corr_silence_diff = 0; | |
789 | ||
790 | /* Find max silence rssi among all 3 receivers. | |
791 | * This is background noise, which may include transmissions from other | |
792 | * networks, measured during silence before our network's beacon */ | |
793 | silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & | |
794 | ALL_BAND_FILTER)>>8); | |
795 | silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & | |
796 | ALL_BAND_FILTER)>>8); | |
797 | silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & | |
798 | ALL_BAND_FILTER)>>8); | |
799 | ||
800 | val = max(silence_rssi_b, silence_rssi_c); | |
801 | max_silence_rssi = max(silence_rssi_a, (u8) val); | |
802 | ||
803 | /* Store silence rssi in 20-beacon history table */ | |
804 | data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; | |
805 | data->nrg_silence_idx++; | |
806 | if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) | |
807 | data->nrg_silence_idx = 0; | |
808 | ||
809 | /* Find max silence rssi across 20 beacon history */ | |
810 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { | |
811 | val = data->nrg_silence_rssi[i]; | |
812 | silence_ref = max(silence_ref, val); | |
813 | } | |
814 | IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n", | |
815 | silence_rssi_a, silence_rssi_b, silence_rssi_c, | |
816 | silence_ref); | |
817 | ||
818 | /* Find max rx energy (min value!) among all 3 receivers, | |
819 | * measured during beacon frame. | |
820 | * Save it in 10-beacon history table. */ | |
821 | i = data->nrg_energy_idx; | |
822 | val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); | |
823 | data->nrg_value[i] = min(rx_info->beacon_energy_a, val); | |
824 | ||
825 | data->nrg_energy_idx++; | |
826 | if (data->nrg_energy_idx >= 10) | |
827 | data->nrg_energy_idx = 0; | |
828 | ||
829 | /* Find min rx energy (max value) across 10 beacon history. | |
830 | * This is the minimum signal level that we want to receive well. | |
831 | * Add backoff (margin so we don't miss slightly lower energy frames). | |
832 | * This establishes an upper bound (min value) for energy threshold. */ | |
833 | max_nrg_cck = data->nrg_value[0]; | |
834 | for (i = 1; i < 10; i++) | |
835 | max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); | |
836 | max_nrg_cck += 6; | |
837 | ||
838 | IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", | |
839 | rx_info->beacon_energy_a, rx_info->beacon_energy_b, | |
840 | rx_info->beacon_energy_c, max_nrg_cck - 6); | |
841 | ||
842 | /* Count number of consecutive beacons with fewer-than-desired | |
843 | * false alarms. */ | |
844 | if (false_alarms < min_false_alarms) | |
845 | data->num_in_cck_no_fa++; | |
846 | else | |
847 | data->num_in_cck_no_fa = 0; | |
848 | IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n", | |
849 | data->num_in_cck_no_fa); | |
850 | ||
851 | /* If we got too many false alarms this time, reduce sensitivity */ | |
852 | if (false_alarms > max_false_alarms) { | |
853 | IWL_DEBUG_CALIB("norm FA %u > max FA %u\n", | |
854 | false_alarms, max_false_alarms); | |
855 | IWL_DEBUG_CALIB("... reducing sensitivity\n"); | |
856 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
857 | ||
858 | if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) { | |
859 | /* Store for "fewer than desired" on later beacon */ | |
860 | data->nrg_silence_ref = silence_ref; | |
861 | ||
862 | /* increase energy threshold (reduce nrg value) | |
863 | * to decrease sensitivity */ | |
864 | if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK)) | |
865 | data->nrg_th_cck = data->nrg_th_cck | |
866 | - NRG_STEP_CCK; | |
867 | } | |
868 | ||
869 | /* increase auto_corr values to decrease sensitivity */ | |
870 | if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) | |
871 | data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; | |
872 | else { | |
873 | val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; | |
874 | data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val); | |
875 | } | |
876 | val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; | |
877 | data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val); | |
878 | ||
879 | /* Else if we got fewer than desired, increase sensitivity */ | |
880 | } else if (false_alarms < min_false_alarms) { | |
881 | data->nrg_curr_state = IWL_FA_TOO_FEW; | |
882 | ||
883 | /* Compare silence level with silence level for most recent | |
884 | * healthy number or too many false alarms */ | |
885 | data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - | |
886 | (s32)silence_ref; | |
887 | ||
888 | IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n", | |
889 | false_alarms, min_false_alarms, | |
890 | data->nrg_auto_corr_silence_diff); | |
891 | ||
892 | /* Increase value to increase sensitivity, but only if: | |
893 | * 1a) previous beacon did *not* have *too many* false alarms | |
894 | * 1b) AND there's a significant difference in Rx levels | |
895 | * from a previous beacon with too many, or healthy # FAs | |
896 | * OR 2) We've seen a lot of beacons (100) with too few | |
897 | * false alarms */ | |
898 | if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && | |
899 | ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || | |
900 | (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { | |
901 | ||
902 | IWL_DEBUG_CALIB("... increasing sensitivity\n"); | |
903 | /* Increase nrg value to increase sensitivity */ | |
904 | val = data->nrg_th_cck + NRG_STEP_CCK; | |
905 | data->nrg_th_cck = min((u32)NRG_MIN_CCK, val); | |
906 | ||
907 | /* Decrease auto_corr values to increase sensitivity */ | |
908 | val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; | |
909 | data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val); | |
910 | ||
911 | val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; | |
912 | data->auto_corr_cck_mrc = | |
913 | max((u32)AUTO_CORR_MIN_CCK_MRC, val); | |
914 | ||
915 | } else | |
916 | IWL_DEBUG_CALIB("... but not changing sensitivity\n"); | |
917 | ||
918 | /* Else we got a healthy number of false alarms, keep status quo */ | |
919 | } else { | |
920 | IWL_DEBUG_CALIB(" FA in safe zone\n"); | |
921 | data->nrg_curr_state = IWL_FA_GOOD_RANGE; | |
922 | ||
923 | /* Store for use in "fewer than desired" with later beacon */ | |
924 | data->nrg_silence_ref = silence_ref; | |
925 | ||
926 | /* If previous beacon had too many false alarms, | |
927 | * give it some extra margin by reducing sensitivity again | |
928 | * (but don't go below measured energy of desired Rx) */ | |
929 | if (IWL_FA_TOO_MANY == data->nrg_prev_state) { | |
930 | IWL_DEBUG_CALIB("... increasing margin\n"); | |
931 | data->nrg_th_cck -= NRG_MARGIN; | |
932 | } | |
933 | } | |
934 | ||
935 | /* Make sure the energy threshold does not go above the measured | |
936 | * energy of the desired Rx signals (reduced by backoff margin), | |
937 | * or else we might start missing Rx frames. | |
938 | * Lower value is higher energy, so we use max()! | |
939 | */ | |
940 | data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); | |
941 | IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck); | |
942 | ||
943 | data->nrg_prev_state = data->nrg_curr_state; | |
944 | ||
945 | return 0; | |
946 | } | |
947 | ||
948 | ||
949 | static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv, | |
950 | u32 norm_fa, | |
951 | u32 rx_enable_time) | |
952 | { | |
953 | u32 val; | |
954 | u32 false_alarms = norm_fa * 200 * 1024; | |
955 | u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; | |
956 | u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; | |
957 | struct iwl_sensitivity_data *data = NULL; | |
958 | ||
959 | data = &(priv->sensitivity_data); | |
960 | ||
961 | /* If we got too many false alarms this time, reduce sensitivity */ | |
962 | if (false_alarms > max_false_alarms) { | |
963 | ||
964 | IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n", | |
965 | false_alarms, max_false_alarms); | |
966 | ||
967 | val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; | |
968 | data->auto_corr_ofdm = | |
969 | min((u32)AUTO_CORR_MAX_OFDM, val); | |
970 | ||
971 | val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; | |
972 | data->auto_corr_ofdm_mrc = | |
973 | min((u32)AUTO_CORR_MAX_OFDM_MRC, val); | |
974 | ||
975 | val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; | |
976 | data->auto_corr_ofdm_x1 = | |
977 | min((u32)AUTO_CORR_MAX_OFDM_X1, val); | |
978 | ||
979 | val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; | |
980 | data->auto_corr_ofdm_mrc_x1 = | |
981 | min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val); | |
982 | } | |
983 | ||
984 | /* Else if we got fewer than desired, increase sensitivity */ | |
985 | else if (false_alarms < min_false_alarms) { | |
986 | ||
987 | IWL_DEBUG_CALIB("norm FA %u < min FA %u\n", | |
988 | false_alarms, min_false_alarms); | |
989 | ||
990 | val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; | |
991 | data->auto_corr_ofdm = | |
992 | max((u32)AUTO_CORR_MIN_OFDM, val); | |
993 | ||
994 | val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; | |
995 | data->auto_corr_ofdm_mrc = | |
996 | max((u32)AUTO_CORR_MIN_OFDM_MRC, val); | |
997 | ||
998 | val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; | |
999 | data->auto_corr_ofdm_x1 = | |
1000 | max((u32)AUTO_CORR_MIN_OFDM_X1, val); | |
1001 | ||
1002 | val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; | |
1003 | data->auto_corr_ofdm_mrc_x1 = | |
1004 | max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val); | |
1005 | } | |
1006 | ||
1007 | else | |
1008 | IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n", | |
1009 | min_false_alarms, false_alarms, max_false_alarms); | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | static int iwl_sensitivity_callback(struct iwl_priv *priv, | |
1015 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
1016 | { | |
1017 | /* We didn't cache the SKB; let the caller free it */ | |
1018 | return 1; | |
1019 | } | |
1020 | ||
1021 | /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ | |
1022 | static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags) | |
1023 | { | |
1024 | int rc = 0; | |
1025 | struct iwl_sensitivity_cmd cmd ; | |
1026 | struct iwl_sensitivity_data *data = NULL; | |
1027 | struct iwl_host_cmd cmd_out = { | |
1028 | .id = SENSITIVITY_CMD, | |
1029 | .len = sizeof(struct iwl_sensitivity_cmd), | |
1030 | .meta.flags = flags, | |
1031 | .data = &cmd, | |
1032 | }; | |
1033 | ||
1034 | data = &(priv->sensitivity_data); | |
1035 | ||
1036 | memset(&cmd, 0, sizeof(cmd)); | |
1037 | ||
1038 | cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = | |
1039 | cpu_to_le16((u16)data->auto_corr_ofdm); | |
1040 | cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = | |
1041 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc); | |
1042 | cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = | |
1043 | cpu_to_le16((u16)data->auto_corr_ofdm_x1); | |
1044 | cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = | |
1045 | cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); | |
1046 | ||
1047 | cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = | |
1048 | cpu_to_le16((u16)data->auto_corr_cck); | |
1049 | cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = | |
1050 | cpu_to_le16((u16)data->auto_corr_cck_mrc); | |
1051 | ||
1052 | cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] = | |
1053 | cpu_to_le16((u16)data->nrg_th_cck); | |
1054 | cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] = | |
1055 | cpu_to_le16((u16)data->nrg_th_ofdm); | |
1056 | ||
1057 | cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = | |
1058 | __constant_cpu_to_le16(190); | |
1059 | cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = | |
1060 | __constant_cpu_to_le16(390); | |
1061 | cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] = | |
1062 | __constant_cpu_to_le16(62); | |
1063 | ||
1064 | IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", | |
1065 | data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, | |
1066 | data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, | |
1067 | data->nrg_th_ofdm); | |
1068 | ||
1069 | IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n", | |
1070 | data->auto_corr_cck, data->auto_corr_cck_mrc, | |
1071 | data->nrg_th_cck); | |
1072 | ||
1073 | cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; | |
1074 | ||
1075 | if (flags & CMD_ASYNC) | |
1076 | cmd_out.meta.u.callback = iwl_sensitivity_callback; | |
1077 | ||
1078 | /* Don't send command to uCode if nothing has changed */ | |
1079 | if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), | |
1080 | sizeof(u16)*HD_TABLE_SIZE)) { | |
1081 | IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n"); | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | /* Copy table for comparison next time */ | |
1086 | memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), | |
1087 | sizeof(u16)*HD_TABLE_SIZE); | |
1088 | ||
1089 | rc = iwl_send_cmd(priv, &cmd_out); | |
1090 | if (!rc) { | |
1091 | IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n"); | |
1092 | return rc; | |
1093 | } | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force) | |
1099 | { | |
1100 | int rc = 0; | |
1101 | int i; | |
1102 | struct iwl_sensitivity_data *data = NULL; | |
1103 | ||
1104 | IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n"); | |
1105 | ||
1106 | if (force) | |
1107 | memset(&(priv->sensitivity_tbl[0]), 0, | |
1108 | sizeof(u16)*HD_TABLE_SIZE); | |
1109 | ||
1110 | /* Clear driver's sensitivity algo data */ | |
1111 | data = &(priv->sensitivity_data); | |
1112 | memset(data, 0, sizeof(struct iwl_sensitivity_data)); | |
1113 | ||
1114 | data->num_in_cck_no_fa = 0; | |
1115 | data->nrg_curr_state = IWL_FA_TOO_MANY; | |
1116 | data->nrg_prev_state = IWL_FA_TOO_MANY; | |
1117 | data->nrg_silence_ref = 0; | |
1118 | data->nrg_silence_idx = 0; | |
1119 | data->nrg_energy_idx = 0; | |
1120 | ||
1121 | for (i = 0; i < 10; i++) | |
1122 | data->nrg_value[i] = 0; | |
1123 | ||
1124 | for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) | |
1125 | data->nrg_silence_rssi[i] = 0; | |
1126 | ||
1127 | data->auto_corr_ofdm = 90; | |
1128 | data->auto_corr_ofdm_mrc = 170; | |
1129 | data->auto_corr_ofdm_x1 = 105; | |
1130 | data->auto_corr_ofdm_mrc_x1 = 220; | |
1131 | data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; | |
1132 | data->auto_corr_cck_mrc = 200; | |
1133 | data->nrg_th_cck = 100; | |
1134 | data->nrg_th_ofdm = 100; | |
1135 | ||
1136 | data->last_bad_plcp_cnt_ofdm = 0; | |
1137 | data->last_fa_cnt_ofdm = 0; | |
1138 | data->last_bad_plcp_cnt_cck = 0; | |
1139 | data->last_fa_cnt_cck = 0; | |
1140 | ||
1141 | /* Clear prior Sensitivity command data to force send to uCode */ | |
1142 | if (force) | |
1143 | memset(&(priv->sensitivity_tbl[0]), 0, | |
1144 | sizeof(u16)*HD_TABLE_SIZE); | |
1145 | ||
1146 | rc |= iwl4965_sensitivity_write(priv, flags); | |
1147 | IWL_DEBUG_CALIB("<<return 0x%X\n", rc); | |
1148 | ||
1149 | return; | |
1150 | } | |
1151 | ||
1152 | ||
1153 | /* Reset differential Rx gains in NIC to prepare for chain noise calibration. | |
1154 | * Called after every association, but this runs only once! | |
1155 | * ... once chain noise is calibrated the first time, it's good forever. */ | |
1156 | void iwl4965_chain_noise_reset(struct iwl_priv *priv) | |
1157 | { | |
1158 | struct iwl_chain_noise_data *data = NULL; | |
1159 | int rc = 0; | |
1160 | ||
1161 | data = &(priv->chain_noise_data); | |
1162 | if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) { | |
1163 | struct iwl_calibration_cmd cmd; | |
1164 | ||
1165 | memset(&cmd, 0, sizeof(cmd)); | |
1166 | cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD; | |
1167 | cmd.diff_gain_a = 0; | |
1168 | cmd.diff_gain_b = 0; | |
1169 | cmd.diff_gain_c = 0; | |
1170 | rc = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, | |
1171 | sizeof(cmd), &cmd); | |
1172 | msleep(4); | |
1173 | data->state = IWL_CHAIN_NOISE_ACCUMULATE; | |
1174 | IWL_DEBUG_CALIB("Run chain_noise_calibrate\n"); | |
1175 | } | |
1176 | return; | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * Accumulate 20 beacons of signal and noise statistics for each of | |
1181 | * 3 receivers/antennas/rx-chains, then figure out: | |
1182 | * 1) Which antennas are connected. | |
1183 | * 2) Differential rx gain settings to balance the 3 receivers. | |
1184 | */ | |
1185 | static void iwl4965_noise_calibration(struct iwl_priv *priv, | |
1186 | struct iwl_notif_statistics *stat_resp) | |
1187 | { | |
1188 | struct iwl_chain_noise_data *data = NULL; | |
1189 | int rc = 0; | |
1190 | ||
1191 | u32 chain_noise_a; | |
1192 | u32 chain_noise_b; | |
1193 | u32 chain_noise_c; | |
1194 | u32 chain_sig_a; | |
1195 | u32 chain_sig_b; | |
1196 | u32 chain_sig_c; | |
1197 | u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
1198 | u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; | |
1199 | u32 max_average_sig; | |
1200 | u16 max_average_sig_antenna_i; | |
1201 | u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; | |
1202 | u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; | |
1203 | u16 i = 0; | |
1204 | u16 chan_num = INITIALIZATION_VALUE; | |
1205 | u32 band = INITIALIZATION_VALUE; | |
1206 | u32 active_chains = 0; | |
1207 | unsigned long flags; | |
1208 | struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); | |
1209 | ||
1210 | data = &(priv->chain_noise_data); | |
1211 | ||
1212 | /* Accumulate just the first 20 beacons after the first association, | |
1213 | * then we're done forever. */ | |
1214 | if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { | |
1215 | if (data->state == IWL_CHAIN_NOISE_ALIVE) | |
1216 | IWL_DEBUG_CALIB("Wait for noise calib reset\n"); | |
1217 | return; | |
1218 | } | |
1219 | ||
1220 | spin_lock_irqsave(&priv->lock, flags); | |
1221 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
1222 | IWL_DEBUG_CALIB(" << Interference data unavailable\n"); | |
1223 | spin_unlock_irqrestore(&priv->lock, flags); | |
1224 | return; | |
1225 | } | |
1226 | ||
1227 | band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1; | |
1228 | chan_num = le16_to_cpu(priv->staging_rxon.channel); | |
1229 | ||
1230 | /* Make sure we accumulate data for just the associated channel | |
1231 | * (even if scanning). */ | |
1232 | if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) || | |
1233 | ((STATISTICS_REPLY_FLG_BAND_24G_MSK == | |
1234 | (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) { | |
1235 | IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n", | |
1236 | chan_num, band); | |
1237 | spin_unlock_irqrestore(&priv->lock, flags); | |
1238 | return; | |
1239 | } | |
1240 | ||
1241 | /* Accumulate beacon statistics values across 20 beacons */ | |
1242 | chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & | |
1243 | IN_BAND_FILTER; | |
1244 | chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & | |
1245 | IN_BAND_FILTER; | |
1246 | chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & | |
1247 | IN_BAND_FILTER; | |
1248 | ||
1249 | chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; | |
1250 | chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; | |
1251 | chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; | |
1252 | ||
1253 | spin_unlock_irqrestore(&priv->lock, flags); | |
1254 | ||
1255 | data->beacon_count++; | |
1256 | ||
1257 | data->chain_noise_a = (chain_noise_a + data->chain_noise_a); | |
1258 | data->chain_noise_b = (chain_noise_b + data->chain_noise_b); | |
1259 | data->chain_noise_c = (chain_noise_c + data->chain_noise_c); | |
1260 | ||
1261 | data->chain_signal_a = (chain_sig_a + data->chain_signal_a); | |
1262 | data->chain_signal_b = (chain_sig_b + data->chain_signal_b); | |
1263 | data->chain_signal_c = (chain_sig_c + data->chain_signal_c); | |
1264 | ||
1265 | IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band, | |
1266 | data->beacon_count); | |
1267 | IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n", | |
1268 | chain_sig_a, chain_sig_b, chain_sig_c); | |
1269 | IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n", | |
1270 | chain_noise_a, chain_noise_b, chain_noise_c); | |
1271 | ||
1272 | /* If this is the 20th beacon, determine: | |
1273 | * 1) Disconnected antennas (using signal strengths) | |
1274 | * 2) Differential gain (using silence noise) to balance receivers */ | |
1275 | if (data->beacon_count == CAL_NUM_OF_BEACONS) { | |
1276 | ||
1277 | /* Analyze signal for disconnected antenna */ | |
1278 | average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS; | |
1279 | average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS; | |
1280 | average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS; | |
1281 | ||
1282 | if (average_sig[0] >= average_sig[1]) { | |
1283 | max_average_sig = average_sig[0]; | |
1284 | max_average_sig_antenna_i = 0; | |
1285 | active_chains = (1 << max_average_sig_antenna_i); | |
1286 | } else { | |
1287 | max_average_sig = average_sig[1]; | |
1288 | max_average_sig_antenna_i = 1; | |
1289 | active_chains = (1 << max_average_sig_antenna_i); | |
1290 | } | |
1291 | ||
1292 | if (average_sig[2] >= max_average_sig) { | |
1293 | max_average_sig = average_sig[2]; | |
1294 | max_average_sig_antenna_i = 2; | |
1295 | active_chains = (1 << max_average_sig_antenna_i); | |
1296 | } | |
1297 | ||
1298 | IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n", | |
1299 | average_sig[0], average_sig[1], average_sig[2]); | |
1300 | IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n", | |
1301 | max_average_sig, max_average_sig_antenna_i); | |
1302 | ||
1303 | /* Compare signal strengths for all 3 receivers. */ | |
1304 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1305 | if (i != max_average_sig_antenna_i) { | |
1306 | s32 rssi_delta = (max_average_sig - | |
1307 | average_sig[i]); | |
1308 | ||
1309 | /* If signal is very weak, compared with | |
1310 | * strongest, mark it as disconnected. */ | |
1311 | if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) | |
1312 | data->disconn_array[i] = 1; | |
1313 | else | |
1314 | active_chains |= (1 << i); | |
1315 | IWL_DEBUG_CALIB("i = %d rssiDelta = %d " | |
1316 | "disconn_array[i] = %d\n", | |
1317 | i, rssi_delta, data->disconn_array[i]); | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | /*If both chains A & B are disconnected - | |
1322 | * connect B and leave A as is */ | |
1323 | if (data->disconn_array[CHAIN_A] && | |
1324 | data->disconn_array[CHAIN_B]) { | |
1325 | data->disconn_array[CHAIN_B] = 0; | |
1326 | active_chains |= (1 << CHAIN_B); | |
1327 | IWL_DEBUG_CALIB("both A & B chains are disconnected! " | |
1328 | "W/A - declare B as connected\n"); | |
1329 | } | |
1330 | ||
1331 | IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n", | |
1332 | active_chains); | |
1333 | ||
1334 | /* Save for use within RXON, TX, SCAN commands, etc. */ | |
1335 | priv->valid_antenna = active_chains; | |
1336 | ||
1337 | /* Analyze noise for rx balance */ | |
1338 | average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS); | |
1339 | average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS); | |
1340 | average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS); | |
1341 | ||
1342 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1343 | if (!(data->disconn_array[i]) && | |
1344 | (average_noise[i] <= min_average_noise)) { | |
1345 | /* This means that chain i is active and has | |
1346 | * lower noise values so far: */ | |
1347 | min_average_noise = average_noise[i]; | |
1348 | min_average_noise_antenna_i = i; | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | data->delta_gain_code[min_average_noise_antenna_i] = 0; | |
1353 | ||
1354 | IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n", | |
1355 | average_noise[0], average_noise[1], | |
1356 | average_noise[2]); | |
1357 | ||
1358 | IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n", | |
1359 | min_average_noise, min_average_noise_antenna_i); | |
1360 | ||
1361 | for (i = 0; i < NUM_RX_CHAINS; i++) { | |
1362 | s32 delta_g = 0; | |
1363 | ||
1364 | if (!(data->disconn_array[i]) && | |
1365 | (data->delta_gain_code[i] == | |
1366 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) { | |
1367 | delta_g = average_noise[i] - min_average_noise; | |
1368 | data->delta_gain_code[i] = (u8)((delta_g * | |
1369 | 10) / 15); | |
1370 | if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE < | |
1371 | data->delta_gain_code[i]) | |
1372 | data->delta_gain_code[i] = | |
1373 | CHAIN_NOISE_MAX_DELTA_GAIN_CODE; | |
1374 | ||
1375 | data->delta_gain_code[i] = | |
1376 | (data->delta_gain_code[i] | (1 << 2)); | |
1377 | } else | |
1378 | data->delta_gain_code[i] = 0; | |
1379 | } | |
1380 | IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n", | |
1381 | data->delta_gain_code[0], | |
1382 | data->delta_gain_code[1], | |
1383 | data->delta_gain_code[2]); | |
1384 | ||
1385 | /* Differential gain gets sent to uCode only once */ | |
1386 | if (!data->radio_write) { | |
1387 | struct iwl_calibration_cmd cmd; | |
1388 | data->radio_write = 1; | |
1389 | ||
1390 | memset(&cmd, 0, sizeof(cmd)); | |
1391 | cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD; | |
1392 | cmd.diff_gain_a = data->delta_gain_code[0]; | |
1393 | cmd.diff_gain_b = data->delta_gain_code[1]; | |
1394 | cmd.diff_gain_c = data->delta_gain_code[2]; | |
1395 | rc = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, | |
1396 | sizeof(cmd), &cmd); | |
1397 | if (rc) | |
1398 | IWL_DEBUG_CALIB("fail sending cmd " | |
1399 | "REPLY_PHY_CALIBRATION_CMD \n"); | |
1400 | ||
1401 | /* TODO we might want recalculate | |
1402 | * rx_chain in rxon cmd */ | |
1403 | ||
1404 | /* Mark so we run this algo only once! */ | |
1405 | data->state = IWL_CHAIN_NOISE_CALIBRATED; | |
1406 | } | |
1407 | data->chain_noise_a = 0; | |
1408 | data->chain_noise_b = 0; | |
1409 | data->chain_noise_c = 0; | |
1410 | data->chain_signal_a = 0; | |
1411 | data->chain_signal_b = 0; | |
1412 | data->chain_signal_c = 0; | |
1413 | data->beacon_count = 0; | |
1414 | } | |
1415 | return; | |
1416 | } | |
1417 | ||
1418 | static void iwl4965_sensitivity_calibration(struct iwl_priv *priv, | |
1419 | struct iwl_notif_statistics *resp) | |
1420 | { | |
1421 | int rc = 0; | |
1422 | u32 rx_enable_time; | |
1423 | u32 fa_cck; | |
1424 | u32 fa_ofdm; | |
1425 | u32 bad_plcp_cck; | |
1426 | u32 bad_plcp_ofdm; | |
1427 | u32 norm_fa_ofdm; | |
1428 | u32 norm_fa_cck; | |
1429 | struct iwl_sensitivity_data *data = NULL; | |
1430 | struct statistics_rx_non_phy *rx_info = &(resp->rx.general); | |
1431 | struct statistics_rx *statistics = &(resp->rx); | |
1432 | unsigned long flags; | |
1433 | struct statistics_general_data statis; | |
1434 | ||
1435 | data = &(priv->sensitivity_data); | |
1436 | ||
1437 | if (!iwl_is_associated(priv)) { | |
1438 | IWL_DEBUG_CALIB("<< - not associated\n"); | |
1439 | return; | |
1440 | } | |
1441 | ||
1442 | spin_lock_irqsave(&priv->lock, flags); | |
1443 | if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { | |
1444 | IWL_DEBUG_CALIB("<< invalid data.\n"); | |
1445 | spin_unlock_irqrestore(&priv->lock, flags); | |
1446 | return; | |
1447 | } | |
1448 | ||
1449 | /* Extract Statistics: */ | |
1450 | rx_enable_time = le32_to_cpu(rx_info->channel_load); | |
1451 | fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); | |
1452 | fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); | |
1453 | bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); | |
1454 | bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); | |
1455 | ||
1456 | statis.beacon_silence_rssi_a = | |
1457 | le32_to_cpu(statistics->general.beacon_silence_rssi_a); | |
1458 | statis.beacon_silence_rssi_b = | |
1459 | le32_to_cpu(statistics->general.beacon_silence_rssi_b); | |
1460 | statis.beacon_silence_rssi_c = | |
1461 | le32_to_cpu(statistics->general.beacon_silence_rssi_c); | |
1462 | statis.beacon_energy_a = | |
1463 | le32_to_cpu(statistics->general.beacon_energy_a); | |
1464 | statis.beacon_energy_b = | |
1465 | le32_to_cpu(statistics->general.beacon_energy_b); | |
1466 | statis.beacon_energy_c = | |
1467 | le32_to_cpu(statistics->general.beacon_energy_c); | |
1468 | ||
1469 | spin_unlock_irqrestore(&priv->lock, flags); | |
1470 | ||
1471 | IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); | |
1472 | ||
1473 | if (!rx_enable_time) { | |
1474 | IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n"); | |
1475 | return; | |
1476 | } | |
1477 | ||
1478 | /* These statistics increase monotonically, and do not reset | |
1479 | * at each beacon. Calculate difference from last value, or just | |
1480 | * use the new statistics value if it has reset or wrapped around. */ | |
1481 | if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) | |
1482 | data->last_bad_plcp_cnt_cck = bad_plcp_cck; | |
1483 | else { | |
1484 | bad_plcp_cck -= data->last_bad_plcp_cnt_cck; | |
1485 | data->last_bad_plcp_cnt_cck += bad_plcp_cck; | |
1486 | } | |
1487 | ||
1488 | if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) | |
1489 | data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; | |
1490 | else { | |
1491 | bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; | |
1492 | data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; | |
1493 | } | |
1494 | ||
1495 | if (data->last_fa_cnt_ofdm > fa_ofdm) | |
1496 | data->last_fa_cnt_ofdm = fa_ofdm; | |
1497 | else { | |
1498 | fa_ofdm -= data->last_fa_cnt_ofdm; | |
1499 | data->last_fa_cnt_ofdm += fa_ofdm; | |
1500 | } | |
1501 | ||
1502 | if (data->last_fa_cnt_cck > fa_cck) | |
1503 | data->last_fa_cnt_cck = fa_cck; | |
1504 | else { | |
1505 | fa_cck -= data->last_fa_cnt_cck; | |
1506 | data->last_fa_cnt_cck += fa_cck; | |
1507 | } | |
1508 | ||
1509 | /* Total aborted signal locks */ | |
1510 | norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; | |
1511 | norm_fa_cck = fa_cck + bad_plcp_cck; | |
1512 | ||
1513 | IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, | |
1514 | bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); | |
1515 | ||
1516 | iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); | |
1517 | iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); | |
1518 | rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC); | |
1519 | ||
1520 | return; | |
1521 | } | |
1522 | ||
1523 | static void iwl4965_bg_sensitivity_work(struct work_struct *work) | |
1524 | { | |
1525 | struct iwl_priv *priv = container_of(work, struct iwl_priv, | |
1526 | sensitivity_work); | |
1527 | ||
1528 | mutex_lock(&priv->mutex); | |
1529 | ||
1530 | if (test_bit(STATUS_EXIT_PENDING, &priv->status) || | |
1531 | test_bit(STATUS_SCANNING, &priv->status)) { | |
1532 | mutex_unlock(&priv->mutex); | |
1533 | return; | |
1534 | } | |
1535 | ||
1536 | if (priv->start_calib) { | |
1537 | iwl4965_noise_calibration(priv, &priv->statistics); | |
1538 | ||
1539 | if (priv->sensitivity_data.state == | |
1540 | IWL_SENS_CALIB_NEED_REINIT) { | |
1541 | iwl4965_init_sensitivity(priv, CMD_ASYNC, 0); | |
1542 | priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED; | |
1543 | } else | |
1544 | iwl4965_sensitivity_calibration(priv, | |
1545 | &priv->statistics); | |
1546 | } | |
1547 | ||
1548 | mutex_unlock(&priv->mutex); | |
1549 | return; | |
1550 | } | |
1551 | #endif /*CONFIG_IWLWIFI_SENSITIVITY*/ | |
1552 | ||
1553 | static void iwl4965_bg_txpower_work(struct work_struct *work) | |
1554 | { | |
1555 | struct iwl_priv *priv = container_of(work, struct iwl_priv, | |
1556 | txpower_work); | |
1557 | ||
1558 | /* If a scan happened to start before we got here | |
1559 | * then just return; the statistics notification will | |
1560 | * kick off another scheduled work to compensate for | |
1561 | * any temperature delta we missed here. */ | |
1562 | if (test_bit(STATUS_EXIT_PENDING, &priv->status) || | |
1563 | test_bit(STATUS_SCANNING, &priv->status)) | |
1564 | return; | |
1565 | ||
1566 | mutex_lock(&priv->mutex); | |
1567 | ||
1568 | /* Regardless of if we are assocaited, we must reconfigure the | |
1569 | * TX power since frames can be sent on non-radar channels while | |
1570 | * not associated */ | |
1571 | iwl_hw_reg_send_txpower(priv); | |
1572 | ||
1573 | /* Update last_temperature to keep is_calib_needed from running | |
1574 | * when it isn't needed... */ | |
1575 | priv->last_temperature = priv->temperature; | |
1576 | ||
1577 | mutex_unlock(&priv->mutex); | |
1578 | } | |
1579 | ||
1580 | /* | |
1581 | * Acquire priv->lock before calling this function ! | |
1582 | */ | |
1583 | static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index) | |
1584 | { | |
1585 | iwl_write_restricted(priv, HBUS_TARG_WRPTR, | |
1586 | (index & 0xff) | (txq_id << 8)); | |
1587 | iwl_write_restricted_reg(priv, SCD_QUEUE_RDPTR(txq_id), index); | |
1588 | } | |
1589 | ||
1590 | /* | |
1591 | * Acquire priv->lock before calling this function ! | |
1592 | */ | |
1593 | static void iwl4965_tx_queue_set_status(struct iwl_priv *priv, | |
1594 | struct iwl_tx_queue *txq, | |
1595 | int tx_fifo_id, int scd_retry) | |
1596 | { | |
1597 | int txq_id = txq->q.id; | |
1598 | int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0; | |
1599 | ||
1600 | iwl_write_restricted_reg(priv, SCD_QUEUE_STATUS_BITS(txq_id), | |
1601 | (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) | | |
1602 | (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) | | |
1603 | (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) | | |
1604 | (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) | | |
1605 | SCD_QUEUE_STTS_REG_MSK); | |
1606 | ||
1607 | txq->sched_retry = scd_retry; | |
1608 | ||
1609 | IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n", | |
1610 | active ? "Activete" : "Deactivate", | |
1611 | scd_retry ? "BA" : "AC", txq_id, tx_fifo_id); | |
1612 | } | |
1613 | ||
1614 | static const u16 default_queue_to_tx_fifo[] = { | |
1615 | IWL_TX_FIFO_AC3, | |
1616 | IWL_TX_FIFO_AC2, | |
1617 | IWL_TX_FIFO_AC1, | |
1618 | IWL_TX_FIFO_AC0, | |
1619 | IWL_CMD_FIFO_NUM, | |
1620 | IWL_TX_FIFO_HCCA_1, | |
1621 | IWL_TX_FIFO_HCCA_2 | |
1622 | }; | |
1623 | ||
1624 | static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id) | |
1625 | { | |
1626 | set_bit(txq_id, &priv->txq_ctx_active_msk); | |
1627 | } | |
1628 | ||
1629 | static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id) | |
1630 | { | |
1631 | clear_bit(txq_id, &priv->txq_ctx_active_msk); | |
1632 | } | |
1633 | ||
1634 | int iwl4965_alive_notify(struct iwl_priv *priv) | |
1635 | { | |
1636 | u32 a; | |
1637 | int i = 0; | |
1638 | unsigned long flags; | |
1639 | int rc; | |
1640 | ||
1641 | spin_lock_irqsave(&priv->lock, flags); | |
1642 | ||
1643 | #ifdef CONFIG_IWLWIFI_SENSITIVITY | |
1644 | memset(&(priv->sensitivity_data), 0, | |
1645 | sizeof(struct iwl_sensitivity_data)); | |
1646 | memset(&(priv->chain_noise_data), 0, | |
1647 | sizeof(struct iwl_chain_noise_data)); | |
1648 | for (i = 0; i < NUM_RX_CHAINS; i++) | |
1649 | priv->chain_noise_data.delta_gain_code[i] = | |
1650 | CHAIN_NOISE_DELTA_GAIN_INIT_VAL; | |
1651 | #endif /* CONFIG_IWLWIFI_SENSITIVITY*/ | |
1652 | rc = iwl_grab_restricted_access(priv); | |
1653 | if (rc) { | |
1654 | spin_unlock_irqrestore(&priv->lock, flags); | |
1655 | return rc; | |
1656 | } | |
1657 | ||
1658 | priv->scd_base_addr = iwl_read_restricted_reg(priv, SCD_SRAM_BASE_ADDR); | |
1659 | a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET; | |
1660 | for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4) | |
1661 | iwl_write_restricted_mem(priv, a, 0); | |
1662 | for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4) | |
1663 | iwl_write_restricted_mem(priv, a, 0); | |
1664 | for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4) | |
1665 | iwl_write_restricted_mem(priv, a, 0); | |
1666 | ||
1667 | iwl_write_restricted_reg(priv, SCD_DRAM_BASE_ADDR, | |
1668 | (priv->hw_setting.shared_phys + | |
1669 | offsetof(struct iwl_shared, queues_byte_cnt_tbls)) >> 10); | |
1670 | iwl_write_restricted_reg(priv, SCD_QUEUECHAIN_SEL, 0); | |
1671 | ||
1672 | /* initiate the queues */ | |
1673 | for (i = 0; i < priv->hw_setting.max_txq_num; i++) { | |
1674 | iwl_write_restricted_reg(priv, SCD_QUEUE_RDPTR(i), 0); | |
1675 | iwl_write_restricted(priv, HBUS_TARG_WRPTR, 0 | (i << 8)); | |
1676 | iwl_write_restricted_mem(priv, priv->scd_base_addr + | |
1677 | SCD_CONTEXT_QUEUE_OFFSET(i), | |
1678 | (SCD_WIN_SIZE << | |
1679 | SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & | |
1680 | SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); | |
1681 | iwl_write_restricted_mem(priv, priv->scd_base_addr + | |
1682 | SCD_CONTEXT_QUEUE_OFFSET(i) + | |
1683 | sizeof(u32), | |
1684 | (SCD_FRAME_LIMIT << | |
1685 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & | |
1686 | SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); | |
1687 | ||
1688 | } | |
1689 | iwl_write_restricted_reg(priv, SCD_INTERRUPT_MASK, | |
1690 | (1 << priv->hw_setting.max_txq_num) - 1); | |
1691 | ||
1692 | iwl_write_restricted_reg(priv, SCD_TXFACT, | |
1693 | SCD_TXFACT_REG_TXFIFO_MASK(0, 7)); | |
1694 | ||
1695 | iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0); | |
1696 | /* map qos queues to fifos one-to-one */ | |
1697 | for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { | |
1698 | int ac = default_queue_to_tx_fifo[i]; | |
1699 | iwl4965_txq_ctx_activate(priv, i); | |
1700 | iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0); | |
1701 | } | |
1702 | ||
1703 | iwl_release_restricted_access(priv); | |
1704 | spin_unlock_irqrestore(&priv->lock, flags); | |
1705 | ||
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | int iwl_hw_set_hw_setting(struct iwl_priv *priv) | |
1710 | { | |
1711 | priv->hw_setting.shared_virt = | |
1712 | pci_alloc_consistent(priv->pci_dev, | |
1713 | sizeof(struct iwl_shared), | |
1714 | &priv->hw_setting.shared_phys); | |
1715 | ||
1716 | if (!priv->hw_setting.shared_virt) | |
1717 | return -1; | |
1718 | ||
1719 | memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl_shared)); | |
1720 | ||
1721 | priv->hw_setting.max_txq_num = iwl_param_queues_num; | |
1722 | priv->hw_setting.ac_queue_count = AC_NUM; | |
1723 | ||
1724 | priv->hw_setting.cck_flag = RATE_MCS_CCK_MSK; | |
1725 | priv->hw_setting.tx_cmd_len = sizeof(struct iwl_tx_cmd); | |
1726 | priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE; | |
1727 | priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG; | |
1728 | ||
1729 | priv->hw_setting.max_stations = IWL4965_STATION_COUNT; | |
1730 | priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID; | |
1731 | return 0; | |
1732 | } | |
1733 | ||
1734 | /** | |
1735 | * iwl_hw_txq_ctx_free - Free TXQ Context | |
1736 | * | |
1737 | * Destroy all TX DMA queues and structures | |
1738 | */ | |
1739 | void iwl_hw_txq_ctx_free(struct iwl_priv *priv) | |
1740 | { | |
1741 | int txq_id; | |
1742 | ||
1743 | /* Tx queues */ | |
1744 | for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) | |
1745 | iwl_tx_queue_free(priv, &priv->txq[txq_id]); | |
1746 | ||
1747 | iwl4965_kw_free(priv); | |
1748 | } | |
1749 | ||
1750 | /** | |
1751 | * iwl_hw_txq_free_tfd - Free one TFD, those at index [txq->q.last_used] | |
1752 | * | |
1753 | * Does NOT advance any indexes | |
1754 | */ | |
1755 | int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq) | |
1756 | { | |
1757 | struct iwl_tfd_frame *bd_tmp = (struct iwl_tfd_frame *)&txq->bd[0]; | |
1758 | struct iwl_tfd_frame *bd = &bd_tmp[txq->q.last_used]; | |
1759 | struct pci_dev *dev = priv->pci_dev; | |
1760 | int i; | |
1761 | int counter = 0; | |
1762 | int index, is_odd; | |
1763 | ||
1764 | /* classify bd */ | |
1765 | if (txq->q.id == IWL_CMD_QUEUE_NUM) | |
1766 | /* nothing to cleanup after for host commands */ | |
1767 | return 0; | |
1768 | ||
1769 | /* sanity check */ | |
1770 | counter = IWL_GET_BITS(*bd, num_tbs); | |
1771 | if (counter > MAX_NUM_OF_TBS) { | |
1772 | IWL_ERROR("Too many chunks: %i\n", counter); | |
1773 | /* @todo issue fatal error, it is quite serious situation */ | |
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | /* unmap chunks if any */ | |
1778 | ||
1779 | for (i = 0; i < counter; i++) { | |
1780 | index = i / 2; | |
1781 | is_odd = i & 0x1; | |
1782 | ||
1783 | if (is_odd) | |
1784 | pci_unmap_single( | |
1785 | dev, | |
1786 | IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) | | |
1787 | (IWL_GET_BITS(bd->pa[index], | |
1788 | tb2_addr_hi20) << 16), | |
1789 | IWL_GET_BITS(bd->pa[index], tb2_len), | |
1790 | PCI_DMA_TODEVICE); | |
1791 | ||
1792 | else if (i > 0) | |
1793 | pci_unmap_single(dev, | |
1794 | le32_to_cpu(bd->pa[index].tb1_addr), | |
1795 | IWL_GET_BITS(bd->pa[index], tb1_len), | |
1796 | PCI_DMA_TODEVICE); | |
1797 | ||
1798 | if (txq->txb[txq->q.last_used].skb[i]) { | |
1799 | struct sk_buff *skb = txq->txb[txq->q.last_used].skb[i]; | |
1800 | ||
1801 | dev_kfree_skb(skb); | |
1802 | txq->txb[txq->q.last_used].skb[i] = NULL; | |
1803 | } | |
1804 | } | |
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | int iwl_hw_reg_set_txpower(struct iwl_priv *priv, s8 power) | |
1809 | { | |
1810 | IWL_ERROR("TODO: Implement iwl_hw_reg_set_txpower!\n"); | |
1811 | return -EINVAL; | |
1812 | } | |
1813 | ||
1814 | static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res) | |
1815 | { | |
1816 | s32 sign = 1; | |
1817 | ||
1818 | if (num < 0) { | |
1819 | sign = -sign; | |
1820 | num = -num; | |
1821 | } | |
1822 | if (denom < 0) { | |
1823 | sign = -sign; | |
1824 | denom = -denom; | |
1825 | } | |
1826 | *res = 1; | |
1827 | *res = ((num * 2 + denom) / (denom * 2)) * sign; | |
1828 | ||
1829 | return 1; | |
1830 | } | |
1831 | ||
1832 | static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage, | |
1833 | s32 current_voltage) | |
1834 | { | |
1835 | s32 comp = 0; | |
1836 | ||
1837 | if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) || | |
1838 | (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage)) | |
1839 | return 0; | |
1840 | ||
1841 | iwl4965_math_div_round(current_voltage - eeprom_voltage, | |
1842 | TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp); | |
1843 | ||
1844 | if (current_voltage > eeprom_voltage) | |
1845 | comp *= 2; | |
1846 | if ((comp < -2) || (comp > 2)) | |
1847 | comp = 0; | |
1848 | ||
1849 | return comp; | |
1850 | } | |
1851 | ||
1852 | static const struct iwl_channel_info * | |
1853 | iwl4965_get_channel_txpower_info(struct iwl_priv *priv, u8 phymode, u16 channel) | |
1854 | { | |
1855 | const struct iwl_channel_info *ch_info; | |
1856 | ||
1857 | ch_info = iwl_get_channel_info(priv, phymode, channel); | |
1858 | ||
1859 | if (!is_channel_valid(ch_info)) | |
1860 | return NULL; | |
1861 | ||
1862 | return ch_info; | |
1863 | } | |
1864 | ||
1865 | static s32 iwl4965_get_tx_atten_grp(u16 channel) | |
1866 | { | |
1867 | if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH && | |
1868 | channel <= CALIB_IWL_TX_ATTEN_GR5_LCH) | |
1869 | return CALIB_CH_GROUP_5; | |
1870 | ||
1871 | if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH && | |
1872 | channel <= CALIB_IWL_TX_ATTEN_GR1_LCH) | |
1873 | return CALIB_CH_GROUP_1; | |
1874 | ||
1875 | if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH && | |
1876 | channel <= CALIB_IWL_TX_ATTEN_GR2_LCH) | |
1877 | return CALIB_CH_GROUP_2; | |
1878 | ||
1879 | if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH && | |
1880 | channel <= CALIB_IWL_TX_ATTEN_GR3_LCH) | |
1881 | return CALIB_CH_GROUP_3; | |
1882 | ||
1883 | if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH && | |
1884 | channel <= CALIB_IWL_TX_ATTEN_GR4_LCH) | |
1885 | return CALIB_CH_GROUP_4; | |
1886 | ||
1887 | IWL_ERROR("Can't find txatten group for channel %d.\n", channel); | |
1888 | return -1; | |
1889 | } | |
1890 | ||
1891 | static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel) | |
1892 | { | |
1893 | s32 b = -1; | |
1894 | ||
1895 | for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) { | |
1896 | if (priv->eeprom.calib_info.band_info[b].ch_from == 0) | |
1897 | continue; | |
1898 | ||
1899 | if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from) | |
1900 | && (channel <= priv->eeprom.calib_info.band_info[b].ch_to)) | |
1901 | break; | |
1902 | } | |
1903 | ||
1904 | return b; | |
1905 | } | |
1906 | ||
1907 | static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2) | |
1908 | { | |
1909 | s32 val; | |
1910 | ||
1911 | if (x2 == x1) | |
1912 | return y1; | |
1913 | else { | |
1914 | iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val); | |
1915 | return val + y2; | |
1916 | } | |
1917 | } | |
1918 | ||
1919 | static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel, | |
1920 | struct iwl_eeprom_calib_ch_info *chan_info) | |
1921 | { | |
1922 | s32 s = -1; | |
1923 | u32 c; | |
1924 | u32 m; | |
1925 | const struct iwl_eeprom_calib_measure *m1; | |
1926 | const struct iwl_eeprom_calib_measure *m2; | |
1927 | struct iwl_eeprom_calib_measure *omeas; | |
1928 | u32 ch_i1; | |
1929 | u32 ch_i2; | |
1930 | ||
1931 | s = iwl4965_get_sub_band(priv, channel); | |
1932 | if (s >= EEPROM_TX_POWER_BANDS) { | |
1933 | IWL_ERROR("Tx Power can not find channel %d ", channel); | |
1934 | return -1; | |
1935 | } | |
1936 | ||
1937 | ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num; | |
1938 | ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num; | |
1939 | chan_info->ch_num = (u8) channel; | |
1940 | ||
1941 | IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n", | |
1942 | channel, s, ch_i1, ch_i2); | |
1943 | ||
1944 | for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) { | |
1945 | for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) { | |
1946 | m1 = &(priv->eeprom.calib_info.band_info[s].ch1. | |
1947 | measurements[c][m]); | |
1948 | m2 = &(priv->eeprom.calib_info.band_info[s].ch2. | |
1949 | measurements[c][m]); | |
1950 | omeas = &(chan_info->measurements[c][m]); | |
1951 | ||
1952 | omeas->actual_pow = | |
1953 | (u8) iwl4965_interpolate_value(channel, ch_i1, | |
1954 | m1->actual_pow, | |
1955 | ch_i2, | |
1956 | m2->actual_pow); | |
1957 | omeas->gain_idx = | |
1958 | (u8) iwl4965_interpolate_value(channel, ch_i1, | |
1959 | m1->gain_idx, ch_i2, | |
1960 | m2->gain_idx); | |
1961 | omeas->temperature = | |
1962 | (u8) iwl4965_interpolate_value(channel, ch_i1, | |
1963 | m1->temperature, | |
1964 | ch_i2, | |
1965 | m2->temperature); | |
1966 | omeas->pa_det = | |
1967 | (s8) iwl4965_interpolate_value(channel, ch_i1, | |
1968 | m1->pa_det, ch_i2, | |
1969 | m2->pa_det); | |
1970 | ||
1971 | IWL_DEBUG_TXPOWER | |
1972 | ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m, | |
1973 | m1->actual_pow, m2->actual_pow, omeas->actual_pow); | |
1974 | IWL_DEBUG_TXPOWER | |
1975 | ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m, | |
1976 | m1->gain_idx, m2->gain_idx, omeas->gain_idx); | |
1977 | IWL_DEBUG_TXPOWER | |
1978 | ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m, | |
1979 | m1->pa_det, m2->pa_det, omeas->pa_det); | |
1980 | IWL_DEBUG_TXPOWER | |
1981 | ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m, | |
1982 | m1->temperature, m2->temperature, | |
1983 | omeas->temperature); | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | /* bit-rate-dependent table to prevent Tx distortion, in half-dB units, | |
1991 | * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */ | |
1992 | static s32 back_off_table[] = { | |
1993 | 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */ | |
1994 | 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */ | |
1995 | 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */ | |
1996 | 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */ | |
1997 | 10 /* CCK */ | |
1998 | }; | |
1999 | ||
2000 | /* Thermal compensation values for txpower for various frequency ranges ... | |
2001 | * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */ | |
2002 | static struct iwl_txpower_comp_entry { | |
2003 | s32 degrees_per_05db_a; | |
2004 | s32 degrees_per_05db_a_denom; | |
2005 | } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = { | |
2006 | {9, 2}, /* group 0 5.2, ch 34-43 */ | |
2007 | {4, 1}, /* group 1 5.2, ch 44-70 */ | |
2008 | {4, 1}, /* group 2 5.2, ch 71-124 */ | |
2009 | {4, 1}, /* group 3 5.2, ch 125-200 */ | |
2010 | {3, 1} /* group 4 2.4, ch all */ | |
2011 | }; | |
2012 | ||
2013 | static s32 get_min_power_index(s32 rate_power_index, u32 band) | |
2014 | { | |
2015 | if (!band) { | |
2016 | if ((rate_power_index & 7) <= 4) | |
2017 | return MIN_TX_GAIN_INDEX_52GHZ_EXT; | |
2018 | } | |
2019 | return MIN_TX_GAIN_INDEX; | |
2020 | } | |
2021 | ||
2022 | struct gain_entry { | |
2023 | u8 dsp; | |
2024 | u8 radio; | |
2025 | }; | |
2026 | ||
2027 | static const struct gain_entry gain_table[2][108] = { | |
2028 | /* 5.2GHz power gain index table */ | |
2029 | { | |
2030 | {123, 0x3F}, /* highest txpower */ | |
2031 | {117, 0x3F}, | |
2032 | {110, 0x3F}, | |
2033 | {104, 0x3F}, | |
2034 | {98, 0x3F}, | |
2035 | {110, 0x3E}, | |
2036 | {104, 0x3E}, | |
2037 | {98, 0x3E}, | |
2038 | {110, 0x3D}, | |
2039 | {104, 0x3D}, | |
2040 | {98, 0x3D}, | |
2041 | {110, 0x3C}, | |
2042 | {104, 0x3C}, | |
2043 | {98, 0x3C}, | |
2044 | {110, 0x3B}, | |
2045 | {104, 0x3B}, | |
2046 | {98, 0x3B}, | |
2047 | {110, 0x3A}, | |
2048 | {104, 0x3A}, | |
2049 | {98, 0x3A}, | |
2050 | {110, 0x39}, | |
2051 | {104, 0x39}, | |
2052 | {98, 0x39}, | |
2053 | {110, 0x38}, | |
2054 | {104, 0x38}, | |
2055 | {98, 0x38}, | |
2056 | {110, 0x37}, | |
2057 | {104, 0x37}, | |
2058 | {98, 0x37}, | |
2059 | {110, 0x36}, | |
2060 | {104, 0x36}, | |
2061 | {98, 0x36}, | |
2062 | {110, 0x35}, | |
2063 | {104, 0x35}, | |
2064 | {98, 0x35}, | |
2065 | {110, 0x34}, | |
2066 | {104, 0x34}, | |
2067 | {98, 0x34}, | |
2068 | {110, 0x33}, | |
2069 | {104, 0x33}, | |
2070 | {98, 0x33}, | |
2071 | {110, 0x32}, | |
2072 | {104, 0x32}, | |
2073 | {98, 0x32}, | |
2074 | {110, 0x31}, | |
2075 | {104, 0x31}, | |
2076 | {98, 0x31}, | |
2077 | {110, 0x30}, | |
2078 | {104, 0x30}, | |
2079 | {98, 0x30}, | |
2080 | {110, 0x25}, | |
2081 | {104, 0x25}, | |
2082 | {98, 0x25}, | |
2083 | {110, 0x24}, | |
2084 | {104, 0x24}, | |
2085 | {98, 0x24}, | |
2086 | {110, 0x23}, | |
2087 | {104, 0x23}, | |
2088 | {98, 0x23}, | |
2089 | {110, 0x22}, | |
2090 | {104, 0x18}, | |
2091 | {98, 0x18}, | |
2092 | {110, 0x17}, | |
2093 | {104, 0x17}, | |
2094 | {98, 0x17}, | |
2095 | {110, 0x16}, | |
2096 | {104, 0x16}, | |
2097 | {98, 0x16}, | |
2098 | {110, 0x15}, | |
2099 | {104, 0x15}, | |
2100 | {98, 0x15}, | |
2101 | {110, 0x14}, | |
2102 | {104, 0x14}, | |
2103 | {98, 0x14}, | |
2104 | {110, 0x13}, | |
2105 | {104, 0x13}, | |
2106 | {98, 0x13}, | |
2107 | {110, 0x12}, | |
2108 | {104, 0x08}, | |
2109 | {98, 0x08}, | |
2110 | {110, 0x07}, | |
2111 | {104, 0x07}, | |
2112 | {98, 0x07}, | |
2113 | {110, 0x06}, | |
2114 | {104, 0x06}, | |
2115 | {98, 0x06}, | |
2116 | {110, 0x05}, | |
2117 | {104, 0x05}, | |
2118 | {98, 0x05}, | |
2119 | {110, 0x04}, | |
2120 | {104, 0x04}, | |
2121 | {98, 0x04}, | |
2122 | {110, 0x03}, | |
2123 | {104, 0x03}, | |
2124 | {98, 0x03}, | |
2125 | {110, 0x02}, | |
2126 | {104, 0x02}, | |
2127 | {98, 0x02}, | |
2128 | {110, 0x01}, | |
2129 | {104, 0x01}, | |
2130 | {98, 0x01}, | |
2131 | {110, 0x00}, | |
2132 | {104, 0x00}, | |
2133 | {98, 0x00}, | |
2134 | {93, 0x00}, | |
2135 | {88, 0x00}, | |
2136 | {83, 0x00}, | |
2137 | {78, 0x00}, | |
2138 | }, | |
2139 | /* 2.4GHz power gain index table */ | |
2140 | { | |
2141 | {110, 0x3f}, /* highest txpower */ | |
2142 | {104, 0x3f}, | |
2143 | {98, 0x3f}, | |
2144 | {110, 0x3e}, | |
2145 | {104, 0x3e}, | |
2146 | {98, 0x3e}, | |
2147 | {110, 0x3d}, | |
2148 | {104, 0x3d}, | |
2149 | {98, 0x3d}, | |
2150 | {110, 0x3c}, | |
2151 | {104, 0x3c}, | |
2152 | {98, 0x3c}, | |
2153 | {110, 0x3b}, | |
2154 | {104, 0x3b}, | |
2155 | {98, 0x3b}, | |
2156 | {110, 0x3a}, | |
2157 | {104, 0x3a}, | |
2158 | {98, 0x3a}, | |
2159 | {110, 0x39}, | |
2160 | {104, 0x39}, | |
2161 | {98, 0x39}, | |
2162 | {110, 0x38}, | |
2163 | {104, 0x38}, | |
2164 | {98, 0x38}, | |
2165 | {110, 0x37}, | |
2166 | {104, 0x37}, | |
2167 | {98, 0x37}, | |
2168 | {110, 0x36}, | |
2169 | {104, 0x36}, | |
2170 | {98, 0x36}, | |
2171 | {110, 0x35}, | |
2172 | {104, 0x35}, | |
2173 | {98, 0x35}, | |
2174 | {110, 0x34}, | |
2175 | {104, 0x34}, | |
2176 | {98, 0x34}, | |
2177 | {110, 0x33}, | |
2178 | {104, 0x33}, | |
2179 | {98, 0x33}, | |
2180 | {110, 0x32}, | |
2181 | {104, 0x32}, | |
2182 | {98, 0x32}, | |
2183 | {110, 0x31}, | |
2184 | {104, 0x31}, | |
2185 | {98, 0x31}, | |
2186 | {110, 0x30}, | |
2187 | {104, 0x30}, | |
2188 | {98, 0x30}, | |
2189 | {110, 0x6}, | |
2190 | {104, 0x6}, | |
2191 | {98, 0x6}, | |
2192 | {110, 0x5}, | |
2193 | {104, 0x5}, | |
2194 | {98, 0x5}, | |
2195 | {110, 0x4}, | |
2196 | {104, 0x4}, | |
2197 | {98, 0x4}, | |
2198 | {110, 0x3}, | |
2199 | {104, 0x3}, | |
2200 | {98, 0x3}, | |
2201 | {110, 0x2}, | |
2202 | {104, 0x2}, | |
2203 | {98, 0x2}, | |
2204 | {110, 0x1}, | |
2205 | {104, 0x1}, | |
2206 | {98, 0x1}, | |
2207 | {110, 0x0}, | |
2208 | {104, 0x0}, | |
2209 | {98, 0x0}, | |
2210 | {97, 0}, | |
2211 | {96, 0}, | |
2212 | {95, 0}, | |
2213 | {94, 0}, | |
2214 | {93, 0}, | |
2215 | {92, 0}, | |
2216 | {91, 0}, | |
2217 | {90, 0}, | |
2218 | {89, 0}, | |
2219 | {88, 0}, | |
2220 | {87, 0}, | |
2221 | {86, 0}, | |
2222 | {85, 0}, | |
2223 | {84, 0}, | |
2224 | {83, 0}, | |
2225 | {82, 0}, | |
2226 | {81, 0}, | |
2227 | {80, 0}, | |
2228 | {79, 0}, | |
2229 | {78, 0}, | |
2230 | {77, 0}, | |
2231 | {76, 0}, | |
2232 | {75, 0}, | |
2233 | {74, 0}, | |
2234 | {73, 0}, | |
2235 | {72, 0}, | |
2236 | {71, 0}, | |
2237 | {70, 0}, | |
2238 | {69, 0}, | |
2239 | {68, 0}, | |
2240 | {67, 0}, | |
2241 | {66, 0}, | |
2242 | {65, 0}, | |
2243 | {64, 0}, | |
2244 | {63, 0}, | |
2245 | {62, 0}, | |
2246 | {61, 0}, | |
2247 | {60, 0}, | |
2248 | {59, 0}, | |
2249 | } | |
2250 | }; | |
2251 | ||
2252 | static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel, | |
2253 | u8 is_fat, u8 ctrl_chan_high, | |
2254 | struct iwl_tx_power_db *tx_power_tbl) | |
2255 | { | |
2256 | u8 saturation_power; | |
2257 | s32 target_power; | |
2258 | s32 user_target_power; | |
2259 | s32 power_limit; | |
2260 | s32 current_temp; | |
2261 | s32 reg_limit; | |
2262 | s32 current_regulatory; | |
2263 | s32 txatten_grp = CALIB_CH_GROUP_MAX; | |
2264 | int i; | |
2265 | int c; | |
2266 | const struct iwl_channel_info *ch_info = NULL; | |
2267 | struct iwl_eeprom_calib_ch_info ch_eeprom_info; | |
2268 | const struct iwl_eeprom_calib_measure *measurement; | |
2269 | s16 voltage; | |
2270 | s32 init_voltage; | |
2271 | s32 voltage_compensation; | |
2272 | s32 degrees_per_05db_num; | |
2273 | s32 degrees_per_05db_denom; | |
2274 | s32 factory_temp; | |
2275 | s32 temperature_comp[2]; | |
2276 | s32 factory_gain_index[2]; | |
2277 | s32 factory_actual_pwr[2]; | |
2278 | s32 power_index; | |
2279 | ||
2280 | /* Sanity check requested level (dBm) */ | |
2281 | if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) { | |
2282 | IWL_WARNING("Requested user TXPOWER %d below limit.\n", | |
2283 | priv->user_txpower_limit); | |
2284 | return -EINVAL; | |
2285 | } | |
2286 | if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) { | |
2287 | IWL_WARNING("Requested user TXPOWER %d above limit.\n", | |
2288 | priv->user_txpower_limit); | |
2289 | return -EINVAL; | |
2290 | } | |
2291 | ||
2292 | /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units | |
2293 | * are used for indexing into txpower table) */ | |
2294 | user_target_power = 2 * priv->user_txpower_limit; | |
2295 | ||
2296 | /* Get current (RXON) channel, band, width */ | |
2297 | ch_info = | |
2298 | iwl4965_get_channel_txpower_info(priv, priv->phymode, channel); | |
2299 | ||
2300 | IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band, | |
2301 | is_fat); | |
2302 | ||
2303 | if (!ch_info) | |
2304 | return -EINVAL; | |
2305 | ||
2306 | /* get txatten group, used to select 1) thermal txpower adjustment | |
2307 | * and 2) mimo txpower balance between Tx chains. */ | |
2308 | txatten_grp = iwl4965_get_tx_atten_grp(channel); | |
2309 | if (txatten_grp < 0) | |
2310 | return -EINVAL; | |
2311 | ||
2312 | IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n", | |
2313 | channel, txatten_grp); | |
2314 | ||
2315 | if (is_fat) { | |
2316 | if (ctrl_chan_high) | |
2317 | channel -= 2; | |
2318 | else | |
2319 | channel += 2; | |
2320 | } | |
2321 | ||
2322 | /* hardware txpower limits ... | |
2323 | * saturation (clipping distortion) txpowers are in half-dBm */ | |
2324 | if (band) | |
2325 | saturation_power = priv->eeprom.calib_info.saturation_power24; | |
2326 | else | |
2327 | saturation_power = priv->eeprom.calib_info.saturation_power52; | |
2328 | ||
2329 | if (saturation_power < IWL_TX_POWER_SATURATION_MIN || | |
2330 | saturation_power > IWL_TX_POWER_SATURATION_MAX) { | |
2331 | if (band) | |
2332 | saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24; | |
2333 | else | |
2334 | saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52; | |
2335 | } | |
2336 | ||
2337 | /* regulatory txpower limits ... reg_limit values are in half-dBm, | |
2338 | * max_power_avg values are in dBm, convert * 2 */ | |
2339 | if (is_fat) | |
2340 | reg_limit = ch_info->fat_max_power_avg * 2; | |
2341 | else | |
2342 | reg_limit = ch_info->max_power_avg * 2; | |
2343 | ||
2344 | if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) || | |
2345 | (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) { | |
2346 | if (band) | |
2347 | reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24; | |
2348 | else | |
2349 | reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52; | |
2350 | } | |
2351 | ||
2352 | /* Interpolate txpower calibration values for this channel, | |
2353 | * based on factory calibration tests on spaced channels. */ | |
2354 | iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info); | |
2355 | ||
2356 | /* calculate tx gain adjustment based on power supply voltage */ | |
2357 | voltage = priv->eeprom.calib_info.voltage; | |
2358 | init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage); | |
2359 | voltage_compensation = | |
2360 | iwl4965_get_voltage_compensation(voltage, init_voltage); | |
2361 | ||
2362 | IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n", | |
2363 | init_voltage, | |
2364 | voltage, voltage_compensation); | |
2365 | ||
2366 | /* get current temperature (Celsius) */ | |
2367 | current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN); | |
2368 | current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX); | |
2369 | current_temp = KELVIN_TO_CELSIUS(current_temp); | |
2370 | ||
2371 | /* select thermal txpower adjustment params, based on channel group | |
2372 | * (same frequency group used for mimo txatten adjustment) */ | |
2373 | degrees_per_05db_num = | |
2374 | tx_power_cmp_tble[txatten_grp].degrees_per_05db_a; | |
2375 | degrees_per_05db_denom = | |
2376 | tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom; | |
2377 | ||
2378 | /* get per-chain txpower values from factory measurements */ | |
2379 | for (c = 0; c < 2; c++) { | |
2380 | measurement = &ch_eeprom_info.measurements[c][1]; | |
2381 | ||
2382 | /* txgain adjustment (in half-dB steps) based on difference | |
2383 | * between factory and current temperature */ | |
2384 | factory_temp = measurement->temperature; | |
2385 | iwl4965_math_div_round((current_temp - factory_temp) * | |
2386 | degrees_per_05db_denom, | |
2387 | degrees_per_05db_num, | |
2388 | &temperature_comp[c]); | |
2389 | ||
2390 | factory_gain_index[c] = measurement->gain_idx; | |
2391 | factory_actual_pwr[c] = measurement->actual_pow; | |
2392 | ||
2393 | IWL_DEBUG_TXPOWER("chain = %d\n", c); | |
2394 | IWL_DEBUG_TXPOWER("fctry tmp %d, " | |
2395 | "curr tmp %d, comp %d steps\n", | |
2396 | factory_temp, current_temp, | |
2397 | temperature_comp[c]); | |
2398 | ||
2399 | IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n", | |
2400 | factory_gain_index[c], | |
2401 | factory_actual_pwr[c]); | |
2402 | } | |
2403 | ||
2404 | /* for each of 33 bit-rates (including 1 for CCK) */ | |
2405 | for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) { | |
2406 | u8 is_mimo_rate; | |
2407 | union iwl_tx_power_dual_stream tx_power; | |
2408 | ||
2409 | /* for mimo, reduce each chain's txpower by half | |
2410 | * (3dB, 6 steps), so total output power is regulatory | |
2411 | * compliant. */ | |
2412 | if (i & 0x8) { | |
2413 | current_regulatory = reg_limit - | |
2414 | IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION; | |
2415 | is_mimo_rate = 1; | |
2416 | } else { | |
2417 | current_regulatory = reg_limit; | |
2418 | is_mimo_rate = 0; | |
2419 | } | |
2420 | ||
2421 | /* find txpower limit, either hardware or regulatory */ | |
2422 | power_limit = saturation_power - back_off_table[i]; | |
2423 | if (power_limit > current_regulatory) | |
2424 | power_limit = current_regulatory; | |
2425 | ||
2426 | /* reduce user's txpower request if necessary | |
2427 | * for this rate on this channel */ | |
2428 | target_power = user_target_power; | |
2429 | if (target_power > power_limit) | |
2430 | target_power = power_limit; | |
2431 | ||
2432 | IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n", | |
2433 | i, saturation_power - back_off_table[i], | |
2434 | current_regulatory, user_target_power, | |
2435 | target_power); | |
2436 | ||
2437 | /* for each of 2 Tx chains (radio transmitters) */ | |
2438 | for (c = 0; c < 2; c++) { | |
2439 | s32 atten_value; | |
2440 | ||
2441 | if (is_mimo_rate) | |
2442 | atten_value = | |
2443 | (s32)le32_to_cpu(priv->card_alive_init. | |
2444 | tx_atten[txatten_grp][c]); | |
2445 | else | |
2446 | atten_value = 0; | |
2447 | ||
2448 | /* calculate index; higher index means lower txpower */ | |
2449 | power_index = (u8) (factory_gain_index[c] - | |
2450 | (target_power - | |
2451 | factory_actual_pwr[c]) - | |
2452 | temperature_comp[c] - | |
2453 | voltage_compensation + | |
2454 | atten_value); | |
2455 | ||
2456 | /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n", | |
2457 | power_index); */ | |
2458 | ||
2459 | if (power_index < get_min_power_index(i, band)) | |
2460 | power_index = get_min_power_index(i, band); | |
2461 | ||
2462 | /* adjust 5 GHz index to support negative indexes */ | |
2463 | if (!band) | |
2464 | power_index += 9; | |
2465 | ||
2466 | /* CCK, rate 32, reduce txpower for CCK */ | |
2467 | if (i == POWER_TABLE_CCK_ENTRY) | |
2468 | power_index += | |
2469 | IWL_TX_POWER_CCK_COMPENSATION_C_STEP; | |
2470 | ||
2471 | /* stay within the table! */ | |
2472 | if (power_index > 107) { | |
2473 | IWL_WARNING("txpower index %d > 107\n", | |
2474 | power_index); | |
2475 | power_index = 107; | |
2476 | } | |
2477 | if (power_index < 0) { | |
2478 | IWL_WARNING("txpower index %d < 0\n", | |
2479 | power_index); | |
2480 | power_index = 0; | |
2481 | } | |
2482 | ||
2483 | /* fill txpower command for this rate/chain */ | |
2484 | tx_power.s.radio_tx_gain[c] = | |
2485 | gain_table[band][power_index].radio; | |
2486 | tx_power.s.dsp_predis_atten[c] = | |
2487 | gain_table[band][power_index].dsp; | |
2488 | ||
2489 | IWL_DEBUG_TXPOWER("chain %d mimo %d index %d " | |
2490 | "gain 0x%02x dsp %d\n", | |
2491 | c, atten_value, power_index, | |
2492 | tx_power.s.radio_tx_gain[c], | |
2493 | tx_power.s.dsp_predis_atten[c]); | |
2494 | }/* for each chain */ | |
2495 | ||
2496 | tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw); | |
2497 | ||
2498 | }/* for each rate */ | |
2499 | ||
2500 | return 0; | |
2501 | } | |
2502 | ||
2503 | /** | |
2504 | * iwl_hw_reg_send_txpower - Configure the TXPOWER level user limit | |
2505 | * | |
2506 | * Uses the active RXON for channel, band, and characteristics (fat, high) | |
2507 | * The power limit is taken from priv->user_txpower_limit. | |
2508 | */ | |
2509 | int iwl_hw_reg_send_txpower(struct iwl_priv *priv) | |
2510 | { | |
2511 | struct iwl_txpowertable_cmd cmd = { 0 }; | |
2512 | int rc = 0; | |
2513 | u8 band = 0; | |
2514 | u8 is_fat = 0; | |
2515 | u8 ctrl_chan_high = 0; | |
2516 | ||
2517 | if (test_bit(STATUS_SCANNING, &priv->status)) { | |
2518 | /* If this gets hit a lot, switch it to a BUG() and catch | |
2519 | * the stack trace to find out who is calling this during | |
2520 | * a scan. */ | |
2521 | IWL_WARNING("TX Power requested while scanning!\n"); | |
2522 | return -EAGAIN; | |
2523 | } | |
2524 | ||
2525 | band = ((priv->phymode == MODE_IEEE80211B) || | |
2526 | (priv->phymode == MODE_IEEE80211G)); | |
2527 | ||
2528 | is_fat = is_fat_channel(priv->active_rxon.flags); | |
2529 | ||
2530 | if (is_fat && | |
2531 | (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK)) | |
2532 | ctrl_chan_high = 1; | |
2533 | ||
2534 | cmd.band = band; | |
2535 | cmd.channel = priv->active_rxon.channel; | |
2536 | ||
2537 | rc = iwl4965_fill_txpower_tbl(priv, band, | |
2538 | le16_to_cpu(priv->active_rxon.channel), | |
2539 | is_fat, ctrl_chan_high, &cmd.tx_power); | |
2540 | if (rc) | |
2541 | return rc; | |
2542 | ||
2543 | rc = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd); | |
2544 | return rc; | |
2545 | } | |
2546 | ||
2547 | int iwl_hw_channel_switch(struct iwl_priv *priv, u16 channel) | |
2548 | { | |
2549 | int rc; | |
2550 | u8 band = 0; | |
2551 | u8 is_fat = 0; | |
2552 | u8 ctrl_chan_high = 0; | |
2553 | struct iwl_channel_switch_cmd cmd = { 0 }; | |
2554 | const struct iwl_channel_info *ch_info; | |
2555 | ||
2556 | band = ((priv->phymode == MODE_IEEE80211B) || | |
2557 | (priv->phymode == MODE_IEEE80211G)); | |
2558 | ||
2559 | ch_info = iwl_get_channel_info(priv, priv->phymode, channel); | |
2560 | ||
2561 | is_fat = is_fat_channel(priv->staging_rxon.flags); | |
2562 | ||
2563 | if (is_fat && | |
2564 | (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK)) | |
2565 | ctrl_chan_high = 1; | |
2566 | ||
2567 | cmd.band = band; | |
2568 | cmd.expect_beacon = 0; | |
2569 | cmd.channel = cpu_to_le16(channel); | |
2570 | cmd.rxon_flags = priv->active_rxon.flags; | |
2571 | cmd.rxon_filter_flags = priv->active_rxon.filter_flags; | |
2572 | cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time); | |
2573 | if (ch_info) | |
2574 | cmd.expect_beacon = is_channel_radar(ch_info); | |
2575 | else | |
2576 | cmd.expect_beacon = 1; | |
2577 | ||
2578 | rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat, | |
2579 | ctrl_chan_high, &cmd.tx_power); | |
2580 | if (rc) { | |
2581 | IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc); | |
2582 | return rc; | |
2583 | } | |
2584 | ||
2585 | rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd); | |
2586 | return rc; | |
2587 | } | |
2588 | ||
2589 | #define RTS_HCCA_RETRY_LIMIT 3 | |
2590 | #define RTS_DFAULT_RETRY_LIMIT 60 | |
2591 | ||
2592 | void iwl_hw_build_tx_cmd_rate(struct iwl_priv *priv, | |
2593 | struct iwl_cmd *cmd, | |
2594 | struct ieee80211_tx_control *ctrl, | |
2595 | struct ieee80211_hdr *hdr, int sta_id, | |
2596 | int is_hcca) | |
2597 | { | |
2598 | u8 rate; | |
2599 | u8 rts_retry_limit = 0; | |
2600 | u8 data_retry_limit = 0; | |
2601 | __le32 tx_flags; | |
2602 | u16 fc = le16_to_cpu(hdr->frame_control); | |
2603 | ||
2604 | tx_flags = cmd->cmd.tx.tx_flags; | |
2605 | ||
2606 | rate = iwl_rates[ctrl->tx_rate].plcp; | |
2607 | ||
2608 | rts_retry_limit = (is_hcca) ? | |
2609 | RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT; | |
2610 | ||
2611 | if (ieee80211_is_probe_response(fc)) { | |
2612 | data_retry_limit = 3; | |
2613 | if (data_retry_limit < rts_retry_limit) | |
2614 | rts_retry_limit = data_retry_limit; | |
2615 | } else | |
2616 | data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
2617 | ||
2618 | if (priv->data_retry_limit != -1) | |
2619 | data_retry_limit = priv->data_retry_limit; | |
2620 | ||
2621 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { | |
2622 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2623 | case IEEE80211_STYPE_AUTH: | |
2624 | case IEEE80211_STYPE_DEAUTH: | |
2625 | case IEEE80211_STYPE_ASSOC_REQ: | |
2626 | case IEEE80211_STYPE_REASSOC_REQ: | |
2627 | if (tx_flags & TX_CMD_FLG_RTS_MSK) { | |
2628 | tx_flags &= ~TX_CMD_FLG_RTS_MSK; | |
2629 | tx_flags |= TX_CMD_FLG_CTS_MSK; | |
2630 | } | |
2631 | break; | |
2632 | default: | |
2633 | break; | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | cmd->cmd.tx.rts_retry_limit = rts_retry_limit; | |
2638 | cmd->cmd.tx.data_retry_limit = data_retry_limit; | |
2639 | cmd->cmd.tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate, 0); | |
2640 | cmd->cmd.tx.tx_flags = tx_flags; | |
2641 | } | |
2642 | ||
2643 | int iwl_hw_get_rx_read(struct iwl_priv *priv) | |
2644 | { | |
2645 | struct iwl_shared *shared_data = priv->hw_setting.shared_virt; | |
2646 | ||
2647 | return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num); | |
2648 | } | |
2649 | ||
2650 | int iwl_hw_get_temperature(struct iwl_priv *priv) | |
2651 | { | |
2652 | return priv->temperature; | |
2653 | } | |
2654 | ||
2655 | unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv, | |
2656 | struct iwl_frame *frame, u8 rate) | |
2657 | { | |
2658 | struct iwl_tx_beacon_cmd *tx_beacon_cmd; | |
2659 | unsigned int frame_size; | |
2660 | ||
2661 | tx_beacon_cmd = &frame->u.beacon; | |
2662 | memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); | |
2663 | ||
2664 | tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID; | |
2665 | tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
2666 | ||
2667 | frame_size = iwl_fill_beacon_frame(priv, | |
2668 | tx_beacon_cmd->frame, | |
2669 | BROADCAST_ADDR, | |
2670 | sizeof(frame->u) - sizeof(*tx_beacon_cmd)); | |
2671 | ||
2672 | BUG_ON(frame_size > MAX_MPDU_SIZE); | |
2673 | tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size); | |
2674 | ||
2675 | if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP)) | |
2676 | tx_beacon_cmd->tx.rate_n_flags = | |
2677 | iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK); | |
2678 | else | |
2679 | tx_beacon_cmd->tx.rate_n_flags = | |
2680 | iwl_hw_set_rate_n_flags(rate, 0); | |
2681 | ||
2682 | tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK | | |
2683 | TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK); | |
2684 | return (sizeof(*tx_beacon_cmd) + frame_size); | |
2685 | } | |
2686 | ||
2687 | int iwl_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq) | |
2688 | { | |
2689 | int rc; | |
2690 | unsigned long flags; | |
2691 | int txq_id = txq->q.id; | |
2692 | ||
2693 | spin_lock_irqsave(&priv->lock, flags); | |
2694 | rc = iwl_grab_restricted_access(priv); | |
2695 | if (rc) { | |
2696 | spin_unlock_irqrestore(&priv->lock, flags); | |
2697 | return rc; | |
2698 | } | |
2699 | ||
2700 | iwl_write_restricted(priv, FH_MEM_CBBC_QUEUE(txq_id), | |
2701 | txq->q.dma_addr >> 8); | |
2702 | iwl_write_restricted( | |
2703 | priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), | |
2704 | IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | | |
2705 | IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL); | |
2706 | iwl_release_restricted_access(priv); | |
2707 | spin_unlock_irqrestore(&priv->lock, flags); | |
2708 | ||
2709 | return 0; | |
2710 | } | |
2711 | ||
2712 | static inline u8 iwl4965_get_dma_hi_address(dma_addr_t addr) | |
2713 | { | |
2714 | return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0; | |
2715 | } | |
2716 | ||
2717 | int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr, | |
2718 | dma_addr_t addr, u16 len) | |
2719 | { | |
2720 | int index, is_odd; | |
2721 | struct iwl_tfd_frame *tfd = ptr; | |
2722 | u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs); | |
2723 | ||
2724 | if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) { | |
2725 | IWL_ERROR("Error can not send more than %d chunks\n", | |
2726 | MAX_NUM_OF_TBS); | |
2727 | return -EINVAL; | |
2728 | } | |
2729 | ||
2730 | index = num_tbs / 2; | |
2731 | is_odd = num_tbs & 0x1; | |
2732 | ||
2733 | if (!is_odd) { | |
2734 | tfd->pa[index].tb1_addr = cpu_to_le32(addr); | |
2735 | IWL_SET_BITS(tfd->pa[index], tb1_addr_hi, | |
2736 | iwl4965_get_dma_hi_address(addr)); | |
2737 | IWL_SET_BITS(tfd->pa[index], tb1_len, len); | |
2738 | } else { | |
2739 | IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16, | |
2740 | (u32) (addr & 0xffff)); | |
2741 | IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16); | |
2742 | IWL_SET_BITS(tfd->pa[index], tb2_len, len); | |
2743 | } | |
2744 | ||
2745 | IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1); | |
2746 | ||
2747 | return 0; | |
2748 | } | |
2749 | ||
2750 | void iwl_hw_card_show_info(struct iwl_priv *priv) | |
2751 | { | |
2752 | u16 hw_version = priv->eeprom.board_revision_4965; | |
2753 | ||
2754 | IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n", | |
2755 | ((hw_version >> 8) & 0x0F), | |
2756 | ((hw_version >> 8) >> 4), (hw_version & 0x00FF)); | |
2757 | ||
2758 | IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n", | |
2759 | priv->eeprom.board_pba_number_4965); | |
2760 | } | |
2761 | ||
2762 | #define IWL_TX_CRC_SIZE 4 | |
2763 | #define IWL_TX_DELIMITER_SIZE 4 | |
2764 | ||
2765 | int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv, | |
2766 | struct iwl_tx_queue *txq, u16 byte_cnt) | |
2767 | { | |
2768 | int len; | |
2769 | int txq_id = txq->q.id; | |
2770 | struct iwl_shared *shared_data = priv->hw_setting.shared_virt; | |
2771 | ||
2772 | if (txq->need_update == 0) | |
2773 | return 0; | |
2774 | ||
2775 | len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE; | |
2776 | ||
2777 | IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id]. | |
2778 | tfd_offset[txq->q.first_empty], byte_cnt, len); | |
2779 | ||
2780 | if (txq->q.first_empty < IWL4965_MAX_WIN_SIZE) | |
2781 | IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id]. | |
2782 | tfd_offset[IWL4965_QUEUE_SIZE + txq->q.first_empty], | |
2783 | byte_cnt, len); | |
2784 | ||
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | /* Set up Rx receiver/antenna/chain usage in "staging" RXON image. | |
2789 | * This should not be used for scan command ... it puts data in wrong place. */ | |
2790 | void iwl4965_set_rxon_chain(struct iwl_priv *priv) | |
2791 | { | |
2792 | u8 is_single = is_single_stream(priv); | |
2793 | u8 idle_state, rx_state; | |
2794 | ||
2795 | priv->staging_rxon.rx_chain = 0; | |
2796 | rx_state = idle_state = 3; | |
2797 | ||
2798 | /* Tell uCode which antennas are actually connected. | |
2799 | * Before first association, we assume all antennas are connected. | |
2800 | * Just after first association, iwl4965_noise_calibration() | |
2801 | * checks which antennas actually *are* connected. */ | |
2802 | priv->staging_rxon.rx_chain |= | |
2803 | cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS); | |
2804 | ||
2805 | /* How many receivers should we use? */ | |
2806 | iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state); | |
2807 | priv->staging_rxon.rx_chain |= | |
2808 | cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS); | |
2809 | priv->staging_rxon.rx_chain |= | |
2810 | cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS); | |
2811 | ||
2812 | if (!is_single && (rx_state >= 2) && | |
2813 | !test_bit(STATUS_POWER_PMI, &priv->status)) | |
2814 | priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; | |
2815 | else | |
2816 | priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; | |
2817 | ||
2818 | IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain); | |
2819 | } | |
2820 | ||
2821 | #ifdef CONFIG_IWLWIFI_HT | |
2822 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
2823 | /* | |
2824 | get the traffic load value for tid | |
2825 | */ | |
2826 | static u32 iwl4965_tl_get_load(struct iwl_priv *priv, u8 tid) | |
2827 | { | |
2828 | u32 load = 0; | |
2829 | u32 current_time = jiffies_to_msecs(jiffies); | |
2830 | u32 time_diff; | |
2831 | s32 index; | |
2832 | unsigned long flags; | |
2833 | struct iwl_traffic_load *tid_ptr = NULL; | |
2834 | ||
2835 | if (tid >= TID_MAX_LOAD_COUNT) | |
2836 | return 0; | |
2837 | ||
2838 | tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]); | |
2839 | ||
2840 | current_time -= current_time % TID_ROUND_VALUE; | |
2841 | ||
2842 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
2843 | if (!(tid_ptr->queue_count)) | |
2844 | goto out; | |
2845 | ||
2846 | time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time); | |
2847 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
2848 | ||
2849 | if (index >= TID_QUEUE_MAX_SIZE) { | |
2850 | u32 oldest_time = current_time - TID_MAX_TIME_DIFF; | |
2851 | ||
2852 | while (tid_ptr->queue_count && | |
2853 | (tid_ptr->time_stamp < oldest_time)) { | |
2854 | tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head]; | |
2855 | tid_ptr->packet_count[tid_ptr->head] = 0; | |
2856 | tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING; | |
2857 | tid_ptr->queue_count--; | |
2858 | tid_ptr->head++; | |
2859 | if (tid_ptr->head >= TID_QUEUE_MAX_SIZE) | |
2860 | tid_ptr->head = 0; | |
2861 | } | |
2862 | } | |
2863 | load = tid_ptr->total; | |
2864 | ||
2865 | out: | |
2866 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
2867 | return load; | |
2868 | } | |
2869 | ||
2870 | /* | |
2871 | increment traffic load value for tid and also remove | |
2872 | any old values if passed the certian time period | |
2873 | */ | |
2874 | static void iwl4965_tl_add_packet(struct iwl_priv *priv, u8 tid) | |
2875 | { | |
2876 | u32 current_time = jiffies_to_msecs(jiffies); | |
2877 | u32 time_diff; | |
2878 | s32 index; | |
2879 | unsigned long flags; | |
2880 | struct iwl_traffic_load *tid_ptr = NULL; | |
2881 | ||
2882 | if (tid >= TID_MAX_LOAD_COUNT) | |
2883 | return; | |
2884 | ||
2885 | tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]); | |
2886 | ||
2887 | current_time -= current_time % TID_ROUND_VALUE; | |
2888 | ||
2889 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
2890 | if (!(tid_ptr->queue_count)) { | |
2891 | tid_ptr->total = 1; | |
2892 | tid_ptr->time_stamp = current_time; | |
2893 | tid_ptr->queue_count = 1; | |
2894 | tid_ptr->head = 0; | |
2895 | tid_ptr->packet_count[0] = 1; | |
2896 | goto out; | |
2897 | } | |
2898 | ||
2899 | time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time); | |
2900 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
2901 | ||
2902 | if (index >= TID_QUEUE_MAX_SIZE) { | |
2903 | u32 oldest_time = current_time - TID_MAX_TIME_DIFF; | |
2904 | ||
2905 | while (tid_ptr->queue_count && | |
2906 | (tid_ptr->time_stamp < oldest_time)) { | |
2907 | tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head]; | |
2908 | tid_ptr->packet_count[tid_ptr->head] = 0; | |
2909 | tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING; | |
2910 | tid_ptr->queue_count--; | |
2911 | tid_ptr->head++; | |
2912 | if (tid_ptr->head >= TID_QUEUE_MAX_SIZE) | |
2913 | tid_ptr->head = 0; | |
2914 | } | |
2915 | } | |
2916 | ||
2917 | index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE; | |
2918 | tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1; | |
2919 | tid_ptr->total = tid_ptr->total + 1; | |
2920 | ||
2921 | if ((index + 1) > tid_ptr->queue_count) | |
2922 | tid_ptr->queue_count = index + 1; | |
2923 | out: | |
2924 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
2925 | ||
2926 | } | |
2927 | ||
2928 | #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS 7 | |
2929 | enum HT_STATUS { | |
2930 | BA_STATUS_FAILURE = 0, | |
2931 | BA_STATUS_INITIATOR_DELBA, | |
2932 | BA_STATUS_RECIPIENT_DELBA, | |
2933 | BA_STATUS_RENEW_ADDBA_REQUEST, | |
2934 | BA_STATUS_ACTIVE, | |
2935 | }; | |
2936 | ||
2937 | static u8 iwl4964_tl_ba_avail(struct iwl_priv *priv) | |
2938 | { | |
2939 | int i; | |
2940 | struct iwl_lq_mngr *lq; | |
2941 | u8 count = 0; | |
2942 | u16 msk; | |
2943 | ||
2944 | lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); | |
2945 | for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) { | |
2946 | msk = 1 << i; | |
2947 | if ((lq->agg_ctrl.granted_ba & msk) || | |
2948 | (lq->agg_ctrl.wait_for_agg_status & msk)) | |
2949 | count++; | |
2950 | } | |
2951 | ||
2952 | if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS) | |
2953 | return 1; | |
2954 | ||
2955 | return 0; | |
2956 | } | |
2957 | ||
2958 | static void iwl4965_ba_status(struct iwl_priv *priv, | |
2959 | u8 tid, enum HT_STATUS status); | |
2960 | ||
2961 | static int iwl4965_perform_addba(struct iwl_priv *priv, u8 tid, u32 length, | |
2962 | u32 ba_timeout) | |
2963 | { | |
2964 | int rc; | |
2965 | ||
2966 | rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid); | |
2967 | if (rc) | |
2968 | iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE); | |
2969 | ||
2970 | return rc; | |
2971 | } | |
2972 | ||
2973 | static int iwl4965_perform_delba(struct iwl_priv *priv, u8 tid) | |
2974 | { | |
2975 | int rc; | |
2976 | ||
2977 | rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid); | |
2978 | if (rc) | |
2979 | iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE); | |
2980 | ||
2981 | return rc; | |
2982 | } | |
2983 | ||
2984 | static void iwl4965_turn_on_agg_for_tid(struct iwl_priv *priv, | |
2985 | struct iwl_lq_mngr *lq, | |
2986 | u8 auto_agg, u8 tid) | |
2987 | { | |
2988 | u32 tid_msk = (1 << tid); | |
2989 | unsigned long flags; | |
2990 | ||
2991 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
2992 | /* | |
2993 | if ((auto_agg) && (!lq->enable_counter)){ | |
2994 | lq->agg_ctrl.next_retry = 0; | |
2995 | lq->agg_ctrl.tid_retry = 0; | |
2996 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
2997 | return; | |
2998 | } | |
2999 | */ | |
3000 | if (!(lq->agg_ctrl.granted_ba & tid_msk) && | |
3001 | (lq->agg_ctrl.requested_ba & tid_msk)) { | |
3002 | u8 available_queues; | |
3003 | u32 load; | |
3004 | ||
3005 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3006 | available_queues = iwl4964_tl_ba_avail(priv); | |
3007 | load = iwl4965_tl_get_load(priv, tid); | |
3008 | ||
3009 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3010 | if (!available_queues) { | |
3011 | if (auto_agg) | |
3012 | lq->agg_ctrl.tid_retry |= tid_msk; | |
3013 | else { | |
3014 | lq->agg_ctrl.requested_ba &= ~tid_msk; | |
3015 | lq->agg_ctrl.wait_for_agg_status &= ~tid_msk; | |
3016 | } | |
3017 | } else if ((auto_agg) && | |
3018 | ((load <= lq->agg_ctrl.tid_traffic_load_threshold) || | |
3019 | ((lq->agg_ctrl.wait_for_agg_status & tid_msk)))) | |
3020 | lq->agg_ctrl.tid_retry |= tid_msk; | |
3021 | else { | |
3022 | lq->agg_ctrl.wait_for_agg_status |= tid_msk; | |
3023 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3024 | iwl4965_perform_addba(priv, tid, 0x40, | |
3025 | lq->agg_ctrl.ba_timeout); | |
3026 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3027 | } | |
3028 | } | |
3029 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3030 | } | |
3031 | ||
3032 | static void iwl4965_turn_on_agg(struct iwl_priv *priv, u8 tid) | |
3033 | { | |
3034 | struct iwl_lq_mngr *lq; | |
3035 | unsigned long flags; | |
3036 | ||
3037 | lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); | |
3038 | ||
3039 | if ((tid < TID_MAX_LOAD_COUNT)) | |
3040 | iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg, | |
3041 | tid); | |
3042 | else if (tid == TID_ALL_SPECIFIED) { | |
3043 | if (lq->agg_ctrl.requested_ba) { | |
3044 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
3045 | iwl4965_turn_on_agg_for_tid(priv, lq, | |
3046 | lq->agg_ctrl.auto_agg, tid); | |
3047 | } else { | |
3048 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3049 | lq->agg_ctrl.tid_retry = 0; | |
3050 | lq->agg_ctrl.next_retry = 0; | |
3051 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3052 | } | |
3053 | } | |
3054 | ||
3055 | } | |
3056 | ||
3057 | void iwl4965_turn_off_agg(struct iwl_priv *priv, u8 tid) | |
3058 | { | |
3059 | u32 tid_msk; | |
3060 | struct iwl_lq_mngr *lq; | |
3061 | unsigned long flags; | |
3062 | ||
3063 | lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); | |
3064 | ||
3065 | if ((tid < TID_MAX_LOAD_COUNT)) { | |
3066 | tid_msk = 1 << tid; | |
3067 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3068 | lq->agg_ctrl.wait_for_agg_status |= tid_msk; | |
3069 | lq->agg_ctrl.requested_ba &= ~tid_msk; | |
3070 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3071 | iwl4965_perform_delba(priv, tid); | |
3072 | } else if (tid == TID_ALL_SPECIFIED) { | |
3073 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3074 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) { | |
3075 | tid_msk = 1 << tid; | |
3076 | lq->agg_ctrl.wait_for_agg_status |= tid_msk; | |
3077 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3078 | iwl4965_perform_delba(priv, tid); | |
3079 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3080 | } | |
3081 | lq->agg_ctrl.requested_ba = 0; | |
3082 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3083 | } | |
3084 | } | |
3085 | ||
3086 | static void iwl4965_ba_status(struct iwl_priv *priv, | |
3087 | u8 tid, enum HT_STATUS status) | |
3088 | { | |
3089 | struct iwl_lq_mngr *lq; | |
3090 | u32 tid_msk = (1 << tid); | |
3091 | unsigned long flags; | |
3092 | ||
3093 | lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); | |
3094 | ||
3095 | if ((tid >= TID_MAX_LOAD_COUNT)) | |
3096 | goto out; | |
3097 | ||
3098 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3099 | switch (status) { | |
3100 | case BA_STATUS_ACTIVE: | |
3101 | if (!(lq->agg_ctrl.granted_ba & tid_msk)) | |
3102 | lq->agg_ctrl.granted_ba |= tid_msk; | |
3103 | break; | |
3104 | default: | |
3105 | if ((lq->agg_ctrl.granted_ba & tid_msk)) | |
3106 | lq->agg_ctrl.granted_ba &= ~tid_msk; | |
3107 | break; | |
3108 | } | |
3109 | ||
3110 | lq->agg_ctrl.wait_for_agg_status &= ~tid_msk; | |
3111 | if (status != BA_STATUS_ACTIVE) { | |
3112 | if (lq->agg_ctrl.auto_agg) { | |
3113 | lq->agg_ctrl.tid_retry |= tid_msk; | |
3114 | lq->agg_ctrl.next_retry = | |
3115 | jiffies + msecs_to_jiffies(500); | |
3116 | } else | |
3117 | lq->agg_ctrl.requested_ba &= ~tid_msk; | |
3118 | } | |
3119 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3120 | out: | |
3121 | return; | |
3122 | } | |
3123 | ||
3124 | static void iwl4965_bg_agg_work(struct work_struct *work) | |
3125 | { | |
3126 | struct iwl_priv *priv = container_of(work, struct iwl_priv, | |
3127 | agg_work); | |
3128 | ||
3129 | u32 tid; | |
3130 | u32 retry_tid; | |
3131 | u32 tid_msk; | |
3132 | unsigned long flags; | |
3133 | struct iwl_lq_mngr *lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); | |
3134 | ||
3135 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3136 | retry_tid = lq->agg_ctrl.tid_retry; | |
3137 | lq->agg_ctrl.tid_retry = 0; | |
3138 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3139 | ||
3140 | if (retry_tid == TID_ALL_SPECIFIED) | |
3141 | iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED); | |
3142 | else { | |
3143 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) { | |
3144 | tid_msk = (1 << tid); | |
3145 | if (retry_tid & tid_msk) | |
3146 | iwl4965_turn_on_agg(priv, tid); | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3151 | if (lq->agg_ctrl.tid_retry) | |
3152 | lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500); | |
3153 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3154 | return; | |
3155 | } | |
3156 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
3157 | #endif /* CONFIG_IWLWIFI_HT */ | |
3158 | ||
3159 | int iwl4965_tx_cmd(struct iwl_priv *priv, struct iwl_cmd *out_cmd, | |
3160 | u8 sta_id, dma_addr_t txcmd_phys, | |
3161 | struct ieee80211_hdr *hdr, u8 hdr_len, | |
3162 | struct ieee80211_tx_control *ctrl, void *sta_in) | |
3163 | { | |
3164 | struct iwl_tx_cmd cmd; | |
3165 | struct iwl_tx_cmd *tx = (struct iwl_tx_cmd *)&out_cmd->cmd.payload[0]; | |
3166 | dma_addr_t scratch_phys; | |
3167 | u8 unicast = 0; | |
3168 | u8 is_data = 1; | |
3169 | u16 fc; | |
3170 | u16 rate_flags; | |
3171 | int rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1); | |
3172 | #ifdef CONFIG_IWLWIFI_HT | |
3173 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
3174 | __le16 *qc; | |
3175 | #endif /*CONFIG_IWLWIFI_HT_AGG */ | |
3176 | #endif /* CONFIG_IWLWIFI_HT */ | |
3177 | ||
3178 | unicast = !is_multicast_ether_addr(hdr->addr1); | |
3179 | ||
3180 | fc = le16_to_cpu(hdr->frame_control); | |
3181 | if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) | |
3182 | is_data = 0; | |
3183 | ||
3184 | memcpy(&cmd, &(out_cmd->cmd.tx), sizeof(struct iwl_tx_cmd)); | |
3185 | memset(tx, 0, sizeof(struct iwl_tx_cmd)); | |
3186 | memcpy(tx->hdr, hdr, hdr_len); | |
3187 | ||
3188 | tx->len = cmd.len; | |
3189 | tx->driver_txop = cmd.driver_txop; | |
3190 | tx->stop_time.life_time = cmd.stop_time.life_time; | |
3191 | tx->tx_flags = cmd.tx_flags; | |
3192 | tx->sta_id = cmd.sta_id; | |
3193 | tx->tid_tspec = cmd.tid_tspec; | |
3194 | tx->timeout.pm_frame_timeout = cmd.timeout.pm_frame_timeout; | |
3195 | tx->next_frame_len = cmd.next_frame_len; | |
3196 | ||
3197 | tx->sec_ctl = cmd.sec_ctl; | |
3198 | memcpy(&(tx->key[0]), &(cmd.key[0]), 16); | |
3199 | tx->tx_flags = cmd.tx_flags; | |
3200 | ||
3201 | tx->rts_retry_limit = cmd.rts_retry_limit; | |
3202 | tx->data_retry_limit = cmd.data_retry_limit; | |
3203 | ||
3204 | scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + | |
3205 | offsetof(struct iwl_tx_cmd, scratch); | |
3206 | tx->dram_lsb_ptr = cpu_to_le32(scratch_phys); | |
3207 | tx->dram_msb_ptr = iwl4965_get_dma_hi_address(scratch_phys); | |
3208 | ||
3209 | /* Hard coded to start at the highest retry fallback position | |
3210 | * until the 4965 specific rate control algorithm is tied in */ | |
3211 | tx->initial_rate_index = LINK_QUAL_MAX_RETRY_NUM - 1; | |
3212 | ||
3213 | /* Alternate between antenna A and B for successive frames */ | |
3214 | if (priv->use_ant_b_for_management_frame) { | |
3215 | priv->use_ant_b_for_management_frame = 0; | |
3216 | rate_flags = RATE_MCS_ANT_B_MSK; | |
3217 | } else { | |
3218 | priv->use_ant_b_for_management_frame = 1; | |
3219 | rate_flags = RATE_MCS_ANT_A_MSK; | |
3220 | } | |
3221 | ||
3222 | if (!unicast || !is_data) { | |
3223 | if ((rate_index >= IWL_FIRST_CCK_RATE) && | |
3224 | (rate_index <= IWL_LAST_CCK_RATE)) | |
3225 | rate_flags |= RATE_MCS_CCK_MSK; | |
3226 | } else { | |
3227 | tx->initial_rate_index = 0; | |
3228 | tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; | |
3229 | } | |
3230 | ||
3231 | tx->rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[rate_index].plcp, | |
3232 | rate_flags); | |
3233 | ||
3234 | if (ieee80211_is_probe_request(fc)) | |
3235 | tx->tx_flags |= TX_CMD_FLG_TSF_MSK; | |
3236 | else if (ieee80211_is_back_request(fc)) | |
3237 | tx->tx_flags |= TX_CMD_FLG_ACK_MSK | | |
3238 | TX_CMD_FLG_IMM_BA_RSP_MASK; | |
3239 | #ifdef CONFIG_IWLWIFI_HT | |
3240 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
3241 | qc = ieee80211_get_qos_ctrl(hdr); | |
3242 | if (qc && | |
3243 | (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) { | |
3244 | u8 tid = 0; | |
3245 | tid = (u8) (le16_to_cpu(*qc) & 0xF); | |
3246 | if (tid < TID_MAX_LOAD_COUNT) | |
3247 | iwl4965_tl_add_packet(priv, tid); | |
3248 | } | |
3249 | ||
3250 | if (priv->lq_mngr.agg_ctrl.next_retry && | |
3251 | (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) { | |
3252 | unsigned long flags; | |
3253 | ||
3254 | spin_lock_irqsave(&priv->lq_mngr.lock, flags); | |
3255 | priv->lq_mngr.agg_ctrl.next_retry = 0; | |
3256 | spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); | |
3257 | schedule_work(&priv->agg_work); | |
3258 | } | |
3259 | #endif | |
3260 | #endif | |
3261 | return 0; | |
3262 | } | |
3263 | ||
3264 | /** | |
3265 | * sign_extend - Sign extend a value using specified bit as sign-bit | |
3266 | * | |
3267 | * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1 | |
3268 | * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7. | |
3269 | * | |
3270 | * @param oper value to sign extend | |
3271 | * @param index 0 based bit index (0<=index<32) to sign bit | |
3272 | */ | |
3273 | static s32 sign_extend(u32 oper, int index) | |
3274 | { | |
3275 | u8 shift = 31 - index; | |
3276 | ||
3277 | return (s32)(oper << shift) >> shift; | |
3278 | } | |
3279 | ||
3280 | /** | |
3281 | * iwl4965_get_temperature - return the calibrated temperature (in Kelvin) | |
3282 | * @statistics: Provides the temperature reading from the uCode | |
3283 | * | |
3284 | * A return of <0 indicates bogus data in the statistics | |
3285 | */ | |
3286 | int iwl4965_get_temperature(const struct iwl_priv *priv) | |
3287 | { | |
3288 | s32 temperature; | |
3289 | s32 vt; | |
3290 | s32 R1, R2, R3; | |
3291 | u32 R4; | |
3292 | ||
3293 | if (test_bit(STATUS_TEMPERATURE, &priv->status) && | |
3294 | (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) { | |
3295 | IWL_DEBUG_TEMP("Running FAT temperature calibration\n"); | |
3296 | R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]); | |
3297 | R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]); | |
3298 | R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]); | |
3299 | R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]); | |
3300 | } else { | |
3301 | IWL_DEBUG_TEMP("Running temperature calibration\n"); | |
3302 | R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]); | |
3303 | R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]); | |
3304 | R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]); | |
3305 | R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]); | |
3306 | } | |
3307 | ||
3308 | /* | |
3309 | * Temperature is only 23 bits so sign extend out to 32 | |
3310 | * | |
3311 | * NOTE If we haven't received a statistics notification yet | |
3312 | * with an updated temperature, use R4 provided to us in the | |
3313 | * ALIVE response. */ | |
3314 | if (!test_bit(STATUS_TEMPERATURE, &priv->status)) | |
3315 | vt = sign_extend(R4, 23); | |
3316 | else | |
3317 | vt = sign_extend( | |
3318 | le32_to_cpu(priv->statistics.general.temperature), 23); | |
3319 | ||
3320 | IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n", | |
3321 | R1, R2, R3, vt); | |
3322 | ||
3323 | if (R3 == R1) { | |
3324 | IWL_ERROR("Calibration conflict R1 == R3\n"); | |
3325 | return -1; | |
3326 | } | |
3327 | ||
3328 | /* Calculate temperature in degrees Kelvin, adjust by 97%. | |
3329 | * Add offset to center the adjustment around 0 degrees Centigrade. */ | |
3330 | temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2); | |
3331 | temperature /= (R3 - R1); | |
3332 | temperature = (temperature * 97) / 100 + | |
3333 | TEMPERATURE_CALIB_KELVIN_OFFSET; | |
3334 | ||
3335 | IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature, | |
3336 | KELVIN_TO_CELSIUS(temperature)); | |
3337 | ||
3338 | return temperature; | |
3339 | } | |
3340 | ||
3341 | /* Adjust Txpower only if temperature variance is greater than threshold. */ | |
3342 | #define IWL_TEMPERATURE_THRESHOLD 3 | |
3343 | ||
3344 | /** | |
3345 | * iwl4965_is_temp_calib_needed - determines if new calibration is needed | |
3346 | * | |
3347 | * If the temperature changed has changed sufficiently, then a recalibration | |
3348 | * is needed. | |
3349 | * | |
3350 | * Assumes caller will replace priv->last_temperature once calibration | |
3351 | * executed. | |
3352 | */ | |
3353 | static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv) | |
3354 | { | |
3355 | int temp_diff; | |
3356 | ||
3357 | if (!test_bit(STATUS_STATISTICS, &priv->status)) { | |
3358 | IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n"); | |
3359 | return 0; | |
3360 | } | |
3361 | ||
3362 | temp_diff = priv->temperature - priv->last_temperature; | |
3363 | ||
3364 | /* get absolute value */ | |
3365 | if (temp_diff < 0) { | |
3366 | IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff); | |
3367 | temp_diff = -temp_diff; | |
3368 | } else if (temp_diff == 0) | |
3369 | IWL_DEBUG_POWER("Same temp, \n"); | |
3370 | else | |
3371 | IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff); | |
3372 | ||
3373 | if (temp_diff < IWL_TEMPERATURE_THRESHOLD) { | |
3374 | IWL_DEBUG_POWER("Thermal txpower calib not needed\n"); | |
3375 | return 0; | |
3376 | } | |
3377 | ||
3378 | IWL_DEBUG_POWER("Thermal txpower calib needed\n"); | |
3379 | ||
3380 | return 1; | |
3381 | } | |
3382 | ||
3383 | /* Calculate noise level, based on measurements during network silence just | |
3384 | * before arriving beacon. This measurement can be done only if we know | |
3385 | * exactly when to expect beacons, therefore only when we're associated. */ | |
3386 | static void iwl4965_rx_calc_noise(struct iwl_priv *priv) | |
3387 | { | |
3388 | struct statistics_rx_non_phy *rx_info | |
3389 | = &(priv->statistics.rx.general); | |
3390 | int num_active_rx = 0; | |
3391 | int total_silence = 0; | |
3392 | int bcn_silence_a = | |
3393 | le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; | |
3394 | int bcn_silence_b = | |
3395 | le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; | |
3396 | int bcn_silence_c = | |
3397 | le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; | |
3398 | ||
3399 | if (bcn_silence_a) { | |
3400 | total_silence += bcn_silence_a; | |
3401 | num_active_rx++; | |
3402 | } | |
3403 | if (bcn_silence_b) { | |
3404 | total_silence += bcn_silence_b; | |
3405 | num_active_rx++; | |
3406 | } | |
3407 | if (bcn_silence_c) { | |
3408 | total_silence += bcn_silence_c; | |
3409 | num_active_rx++; | |
3410 | } | |
3411 | ||
3412 | /* Average among active antennas */ | |
3413 | if (num_active_rx) | |
3414 | priv->last_rx_noise = (total_silence / num_active_rx) - 107; | |
3415 | else | |
3416 | priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; | |
3417 | ||
3418 | IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", | |
3419 | bcn_silence_a, bcn_silence_b, bcn_silence_c, | |
3420 | priv->last_rx_noise); | |
3421 | } | |
3422 | ||
3423 | void iwl_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) | |
3424 | { | |
3425 | struct iwl_rx_packet *pkt = (void *)rxb->skb->data; | |
3426 | int change; | |
3427 | s32 temp; | |
3428 | ||
3429 | IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n", | |
3430 | (int)sizeof(priv->statistics), pkt->len); | |
3431 | ||
3432 | change = ((priv->statistics.general.temperature != | |
3433 | pkt->u.stats.general.temperature) || | |
3434 | ((priv->statistics.flag & | |
3435 | STATISTICS_REPLY_FLG_FAT_MODE_MSK) != | |
3436 | (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK))); | |
3437 | ||
3438 | memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics)); | |
3439 | ||
3440 | set_bit(STATUS_STATISTICS, &priv->status); | |
3441 | ||
3442 | /* Reschedule the statistics timer to occur in | |
3443 | * REG_RECALIB_PERIOD seconds to ensure we get a | |
3444 | * thermal update even if the uCode doesn't give | |
3445 | * us one */ | |
3446 | mod_timer(&priv->statistics_periodic, jiffies + | |
3447 | msecs_to_jiffies(REG_RECALIB_PERIOD * 1000)); | |
3448 | ||
3449 | if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && | |
3450 | (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { | |
3451 | iwl4965_rx_calc_noise(priv); | |
3452 | #ifdef CONFIG_IWLWIFI_SENSITIVITY | |
3453 | queue_work(priv->workqueue, &priv->sensitivity_work); | |
3454 | #endif | |
3455 | } | |
3456 | ||
3457 | /* If the hardware hasn't reported a change in | |
3458 | * temperature then don't bother computing a | |
3459 | * calibrated temperature value */ | |
3460 | if (!change) | |
3461 | return; | |
3462 | ||
3463 | temp = iwl4965_get_temperature(priv); | |
3464 | if (temp < 0) | |
3465 | return; | |
3466 | ||
3467 | if (priv->temperature != temp) { | |
3468 | if (priv->temperature) | |
3469 | IWL_DEBUG_TEMP("Temperature changed " | |
3470 | "from %dC to %dC\n", | |
3471 | KELVIN_TO_CELSIUS(priv->temperature), | |
3472 | KELVIN_TO_CELSIUS(temp)); | |
3473 | else | |
3474 | IWL_DEBUG_TEMP("Temperature " | |
3475 | "initialized to %dC\n", | |
3476 | KELVIN_TO_CELSIUS(temp)); | |
3477 | } | |
3478 | ||
3479 | priv->temperature = temp; | |
3480 | set_bit(STATUS_TEMPERATURE, &priv->status); | |
3481 | ||
3482 | if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && | |
3483 | iwl4965_is_temp_calib_needed(priv)) | |
3484 | queue_work(priv->workqueue, &priv->txpower_work); | |
3485 | } | |
3486 | ||
3487 | static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data, | |
3488 | int include_phy, | |
3489 | struct iwl_rx_mem_buffer *rxb, | |
3490 | struct ieee80211_rx_status *stats) | |
3491 | { | |
3492 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; | |
3493 | struct iwl4965_rx_phy_res *rx_start = (include_phy) ? | |
3494 | (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL; | |
3495 | struct ieee80211_hdr *hdr; | |
3496 | u16 len; | |
3497 | __le32 *rx_end; | |
3498 | unsigned int skblen; | |
3499 | u32 ampdu_status; | |
3500 | ||
3501 | if (!include_phy && priv->last_phy_res[0]) | |
3502 | rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; | |
3503 | ||
3504 | if (!rx_start) { | |
3505 | IWL_ERROR("MPDU frame without a PHY data\n"); | |
3506 | return; | |
3507 | } | |
3508 | if (include_phy) { | |
3509 | hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] + | |
3510 | rx_start->cfg_phy_cnt); | |
3511 | ||
3512 | len = le16_to_cpu(rx_start->byte_count); | |
3513 | ||
3514 | rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] + | |
3515 | sizeof(struct iwl4965_rx_phy_res) + | |
3516 | rx_start->cfg_phy_cnt + len); | |
3517 | ||
3518 | } else { | |
3519 | struct iwl4965_rx_mpdu_res_start *amsdu = | |
3520 | (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; | |
3521 | ||
3522 | hdr = (struct ieee80211_hdr *)(pkt->u.raw + | |
3523 | sizeof(struct iwl4965_rx_mpdu_res_start)); | |
3524 | len = le16_to_cpu(amsdu->byte_count); | |
3525 | rx_start->byte_count = amsdu->byte_count; | |
3526 | rx_end = (__le32 *) (((u8 *) hdr) + len); | |
3527 | } | |
3528 | if (len > 2342 || len < 16) { | |
3529 | IWL_DEBUG_DROP("byte count out of range [16,2342]" | |
3530 | " : %d\n", len); | |
3531 | return; | |
3532 | } | |
3533 | ||
3534 | ampdu_status = le32_to_cpu(*rx_end); | |
3535 | skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32); | |
3536 | ||
3537 | /* start from MAC */ | |
3538 | skb_reserve(rxb->skb, (void *)hdr - (void *)pkt); | |
3539 | skb_put(rxb->skb, len); /* end where data ends */ | |
3540 | ||
3541 | /* We only process data packets if the interface is open */ | |
3542 | if (unlikely(!priv->is_open)) { | |
3543 | IWL_DEBUG_DROP_LIMIT | |
3544 | ("Dropping packet while interface is not open.\n"); | |
3545 | return; | |
3546 | } | |
3547 | ||
3548 | if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) { | |
3549 | if (iwl_param_hwcrypto) | |
3550 | iwl_set_decrypted_flag(priv, rxb->skb, | |
3551 | ampdu_status, stats); | |
3552 | iwl_handle_data_packet_monitor(priv, rxb, hdr, len, stats, 0); | |
3553 | return; | |
3554 | } | |
3555 | ||
3556 | stats->flag = 0; | |
3557 | hdr = (struct ieee80211_hdr *)rxb->skb->data; | |
3558 | ||
3559 | if (iwl_param_hwcrypto) | |
3560 | iwl_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats); | |
3561 | ||
3562 | ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats); | |
3563 | priv->alloc_rxb_skb--; | |
3564 | rxb->skb = NULL; | |
3565 | #ifdef LED | |
3566 | priv->led_packets += len; | |
3567 | iwl_setup_activity_timer(priv); | |
3568 | #endif | |
3569 | } | |
3570 | ||
3571 | /* Calc max signal level (dBm) among 3 possible receivers */ | |
3572 | static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp) | |
3573 | { | |
3574 | /* data from PHY/DSP regarding signal strength, etc., | |
3575 | * contents are always there, not configurable by host. */ | |
3576 | struct iwl4965_rx_non_cfg_phy *ncphy = | |
3577 | (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy; | |
3578 | u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK) | |
3579 | >> IWL_AGC_DB_POS; | |
3580 | ||
3581 | u32 valid_antennae = | |
3582 | (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK) | |
3583 | >> RX_PHY_FLAGS_ANTENNAE_OFFSET; | |
3584 | u8 max_rssi = 0; | |
3585 | u32 i; | |
3586 | ||
3587 | /* Find max rssi among 3 possible receivers. | |
3588 | * These values are measured by the digital signal processor (DSP). | |
3589 | * They should stay fairly constant even as the signal strength varies, | |
3590 | * if the radio's automatic gain control (AGC) is working right. | |
3591 | * AGC value (see below) will provide the "interesting" info. */ | |
3592 | for (i = 0; i < 3; i++) | |
3593 | if (valid_antennae & (1 << i)) | |
3594 | max_rssi = max(ncphy->rssi_info[i << 1], max_rssi); | |
3595 | ||
3596 | IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n", | |
3597 | ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4], | |
3598 | max_rssi, agc); | |
3599 | ||
3600 | /* dBm = max_rssi dB - agc dB - constant. | |
3601 | * Higher AGC (higher radio gain) means lower signal. */ | |
3602 | return (max_rssi - agc - IWL_RSSI_OFFSET); | |
3603 | } | |
3604 | ||
3605 | #ifdef CONFIG_IWLWIFI_HT | |
3606 | ||
3607 | /* Parsed Information Elements */ | |
3608 | struct ieee802_11_elems { | |
3609 | u8 *ds_params; | |
3610 | u8 ds_params_len; | |
3611 | u8 *tim; | |
3612 | u8 tim_len; | |
3613 | u8 *ibss_params; | |
3614 | u8 ibss_params_len; | |
3615 | u8 *erp_info; | |
3616 | u8 erp_info_len; | |
3617 | u8 *ht_cap_param; | |
3618 | u8 ht_cap_param_len; | |
3619 | u8 *ht_extra_param; | |
3620 | u8 ht_extra_param_len; | |
3621 | }; | |
3622 | ||
3623 | static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems) | |
3624 | { | |
3625 | size_t left = len; | |
3626 | u8 *pos = start; | |
3627 | int unknown = 0; | |
3628 | ||
3629 | memset(elems, 0, sizeof(*elems)); | |
3630 | ||
3631 | while (left >= 2) { | |
3632 | u8 id, elen; | |
3633 | ||
3634 | id = *pos++; | |
3635 | elen = *pos++; | |
3636 | left -= 2; | |
3637 | ||
3638 | if (elen > left) | |
3639 | return -1; | |
3640 | ||
3641 | switch (id) { | |
3642 | case WLAN_EID_DS_PARAMS: | |
3643 | elems->ds_params = pos; | |
3644 | elems->ds_params_len = elen; | |
3645 | break; | |
3646 | case WLAN_EID_TIM: | |
3647 | elems->tim = pos; | |
3648 | elems->tim_len = elen; | |
3649 | break; | |
3650 | case WLAN_EID_IBSS_PARAMS: | |
3651 | elems->ibss_params = pos; | |
3652 | elems->ibss_params_len = elen; | |
3653 | break; | |
3654 | case WLAN_EID_ERP_INFO: | |
3655 | elems->erp_info = pos; | |
3656 | elems->erp_info_len = elen; | |
3657 | break; | |
3658 | case WLAN_EID_HT_CAPABILITY: | |
3659 | elems->ht_cap_param = pos; | |
3660 | elems->ht_cap_param_len = elen; | |
3661 | break; | |
3662 | case WLAN_EID_HT_EXTRA_INFO: | |
3663 | elems->ht_extra_param = pos; | |
3664 | elems->ht_extra_param_len = elen; | |
3665 | break; | |
3666 | default: | |
3667 | unknown++; | |
3668 | break; | |
3669 | } | |
3670 | ||
3671 | left -= elen; | |
3672 | pos += elen; | |
3673 | } | |
3674 | ||
3675 | return 0; | |
3676 | } | |
3677 | #endif /* CONFIG_IWLWIFI_HT */ | |
3678 | ||
3679 | static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) | |
3680 | { | |
3681 | unsigned long flags; | |
3682 | ||
3683 | spin_lock_irqsave(&priv->sta_lock, flags); | |
3684 | priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK; | |
3685 | priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; | |
3686 | priv->stations[sta_id].sta.sta.modify_mask = 0; | |
3687 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
3688 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
3689 | ||
3690 | iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); | |
3691 | } | |
3692 | ||
3693 | static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr) | |
3694 | { | |
3695 | /* FIXME: need locking over ps_status ??? */ | |
3696 | u8 sta_id = iwl_hw_find_station(priv, addr); | |
3697 | ||
3698 | if (sta_id != IWL_INVALID_STATION) { | |
3699 | u8 sta_awake = priv->stations[sta_id]. | |
3700 | ps_status == STA_PS_STATUS_WAKE; | |
3701 | ||
3702 | if (sta_awake && ps_bit) | |
3703 | priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP; | |
3704 | else if (!sta_awake && !ps_bit) { | |
3705 | iwl4965_sta_modify_ps_wake(priv, sta_id); | |
3706 | priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE; | |
3707 | } | |
3708 | } | |
3709 | } | |
3710 | ||
3711 | /* Called for REPLY_4965_RX (legacy ABG frames), or | |
3712 | * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ | |
3713 | static void iwl4965_rx_reply_rx(struct iwl_priv *priv, | |
3714 | struct iwl_rx_mem_buffer *rxb) | |
3715 | { | |
3716 | struct iwl_rx_packet *pkt = (void *)rxb->skb->data; | |
3717 | /* Use phy data (Rx signal strength, etc.) contained within | |
3718 | * this rx packet for legacy frames, | |
3719 | * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */ | |
3720 | int include_phy = (pkt->hdr.cmd == REPLY_4965_RX); | |
3721 | struct iwl4965_rx_phy_res *rx_start = (include_phy) ? | |
3722 | (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : | |
3723 | (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; | |
3724 | __le32 *rx_end; | |
3725 | unsigned int len = 0; | |
3726 | struct ieee80211_hdr *header; | |
3727 | u16 fc; | |
3728 | struct ieee80211_rx_status stats = { | |
3729 | .mactime = le64_to_cpu(rx_start->timestamp), | |
3730 | .channel = le16_to_cpu(rx_start->channel), | |
3731 | .phymode = | |
3732 | (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? | |
3733 | MODE_IEEE80211G : MODE_IEEE80211A, | |
3734 | .antenna = 0, | |
3735 | .rate = iwl_hw_get_rate(rx_start->rate_n_flags), | |
3736 | .flag = 0, | |
3737 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
3738 | .ordered = 0 | |
3739 | #endif /* CONFIG_IWLWIFI_HT_AGG */ | |
3740 | }; | |
3741 | u8 network_packet; | |
3742 | ||
3743 | if ((unlikely(rx_start->cfg_phy_cnt > 20))) { | |
3744 | IWL_DEBUG_DROP | |
3745 | ("dsp size out of range [0,20]: " | |
3746 | "%d/n", rx_start->cfg_phy_cnt); | |
3747 | return; | |
3748 | } | |
3749 | if (!include_phy) { | |
3750 | if (priv->last_phy_res[0]) | |
3751 | rx_start = (struct iwl4965_rx_phy_res *) | |
3752 | &priv->last_phy_res[1]; | |
3753 | else | |
3754 | rx_start = NULL; | |
3755 | } | |
3756 | ||
3757 | if (!rx_start) { | |
3758 | IWL_ERROR("MPDU frame without a PHY data\n"); | |
3759 | return; | |
3760 | } | |
3761 | ||
3762 | if (include_phy) { | |
3763 | header = (struct ieee80211_hdr *)((u8 *) & rx_start[1] | |
3764 | + rx_start->cfg_phy_cnt); | |
3765 | ||
3766 | len = le16_to_cpu(rx_start->byte_count); | |
3767 | rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt + | |
3768 | sizeof(struct iwl4965_rx_phy_res) + len); | |
3769 | } else { | |
3770 | struct iwl4965_rx_mpdu_res_start *amsdu = | |
3771 | (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; | |
3772 | ||
3773 | header = (void *)(pkt->u.raw + | |
3774 | sizeof(struct iwl4965_rx_mpdu_res_start)); | |
3775 | len = le16_to_cpu(amsdu->byte_count); | |
3776 | rx_end = (__le32 *) (pkt->u.raw + | |
3777 | sizeof(struct iwl4965_rx_mpdu_res_start) + len); | |
3778 | } | |
3779 | ||
3780 | if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) || | |
3781 | !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) { | |
3782 | IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", | |
3783 | le32_to_cpu(*rx_end)); | |
3784 | return; | |
3785 | } | |
3786 | ||
3787 | priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp); | |
3788 | ||
3789 | stats.freq = ieee80211chan2mhz(stats.channel); | |
3790 | ||
3791 | /* Find max signal strength (dBm) among 3 antenna/receiver chains */ | |
3792 | stats.ssi = iwl4965_calc_rssi(rx_start); | |
3793 | ||
3794 | /* Meaningful noise values are available only from beacon statistics, | |
3795 | * which are gathered only when associated, and indicate noise | |
3796 | * only for the associated network channel ... | |
3797 | * Ignore these noise values while scanning (other channels) */ | |
3798 | if (iwl_is_associated(priv) && | |
3799 | !test_bit(STATUS_SCANNING, &priv->status)) { | |
3800 | stats.noise = priv->last_rx_noise; | |
3801 | stats.signal = iwl_calc_sig_qual(stats.ssi, stats.noise); | |
3802 | } else { | |
3803 | stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE; | |
3804 | stats.signal = iwl_calc_sig_qual(stats.ssi, 0); | |
3805 | } | |
3806 | ||
3807 | /* Reset beacon noise level if not associated. */ | |
3808 | if (!iwl_is_associated(priv)) | |
3809 | priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; | |
3810 | ||
3811 | #ifdef CONFIG_IWLWIFI_DEBUG | |
3812 | /* TODO: Parts of iwl_report_frame are broken for 4965 */ | |
3813 | if (iwl_debug_level & (IWL_DL_RX)) | |
3814 | /* Set "1" to report good data frames in groups of 100 */ | |
3815 | iwl_report_frame(priv, pkt, header, 1); | |
3816 | ||
3817 | if (iwl_debug_level & (IWL_DL_RX | IWL_DL_STATS)) | |
3818 | IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n", | |
3819 | stats.ssi, stats.noise, stats.signal, | |
3820 | (long unsigned int)le64_to_cpu(rx_start->timestamp)); | |
3821 | #endif | |
3822 | ||
3823 | network_packet = iwl_is_network_packet(priv, header); | |
3824 | if (network_packet) { | |
3825 | priv->last_rx_rssi = stats.ssi; | |
3826 | priv->last_beacon_time = priv->ucode_beacon_time; | |
3827 | priv->last_tsf = le64_to_cpu(rx_start->timestamp); | |
3828 | } | |
3829 | ||
3830 | fc = le16_to_cpu(header->frame_control); | |
3831 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
3832 | case IEEE80211_FTYPE_MGMT: | |
3833 | ||
3834 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) | |
3835 | iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM, | |
3836 | header->addr2); | |
3837 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3838 | case IEEE80211_STYPE_PROBE_RESP: | |
3839 | case IEEE80211_STYPE_BEACON: | |
3840 | if ((priv->iw_mode == IEEE80211_IF_TYPE_STA && | |
3841 | !compare_ether_addr(header->addr2, priv->bssid)) || | |
3842 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS && | |
3843 | !compare_ether_addr(header->addr3, priv->bssid))) { | |
3844 | struct ieee80211_mgmt *mgmt = | |
3845 | (struct ieee80211_mgmt *)header; | |
3846 | u64 timestamp = | |
3847 | le64_to_cpu(mgmt->u.beacon.timestamp); | |
3848 | ||
3849 | priv->timestamp0 = timestamp & 0xFFFFFFFF; | |
3850 | priv->timestamp1 = | |
3851 | (timestamp >> 32) & 0xFFFFFFFF; | |
3852 | priv->beacon_int = le16_to_cpu( | |
3853 | mgmt->u.beacon.beacon_int); | |
3854 | if (priv->call_post_assoc_from_beacon && | |
3855 | (priv->iw_mode == IEEE80211_IF_TYPE_STA)) { | |
3856 | priv->call_post_assoc_from_beacon = 0; | |
3857 | queue_work(priv->workqueue, | |
3858 | &priv->post_associate.work); | |
3859 | } | |
3860 | } | |
3861 | break; | |
3862 | ||
3863 | case IEEE80211_STYPE_ACTION: | |
3864 | break; | |
3865 | ||
3866 | /* | |
3867 | * TODO: There is no callback function from upper | |
3868 | * stack to inform us when associated status. this | |
3869 | * work around to sniff assoc_resp management frame | |
3870 | * and finish the association process. | |
3871 | */ | |
3872 | case IEEE80211_STYPE_ASSOC_RESP: | |
3873 | case IEEE80211_STYPE_REASSOC_RESP: | |
3874 | if (network_packet && iwl_is_associated(priv)) { | |
3875 | #ifdef CONFIG_IWLWIFI_HT | |
3876 | u8 *pos = NULL; | |
3877 | struct ieee802_11_elems elems; | |
3878 | #endif /*CONFIG_IWLWIFI_HT */ | |
3879 | struct ieee80211_mgmt *mgnt = | |
3880 | (struct ieee80211_mgmt *)header; | |
3881 | ||
3882 | priv->assoc_id = (~((1 << 15) | (1 << 14)) | |
3883 | & le16_to_cpu(mgnt->u.assoc_resp.aid)); | |
3884 | priv->assoc_capability = | |
3885 | le16_to_cpu( | |
3886 | mgnt->u.assoc_resp.capab_info); | |
3887 | #ifdef CONFIG_IWLWIFI_HT | |
3888 | pos = mgnt->u.assoc_resp.variable; | |
3889 | if (!parse_elems(pos, | |
3890 | len - (pos - (u8 *) mgnt), | |
3891 | &elems)) { | |
3892 | if (elems.ht_extra_param && | |
3893 | elems.ht_cap_param) | |
3894 | break; | |
3895 | } | |
3896 | #endif /*CONFIG_IWLWIFI_HT */ | |
3897 | /* assoc_id is 0 no association */ | |
3898 | if (!priv->assoc_id) | |
3899 | break; | |
3900 | if (priv->beacon_int) | |
3901 | queue_work(priv->workqueue, | |
3902 | &priv->post_associate.work); | |
3903 | else | |
3904 | priv->call_post_assoc_from_beacon = 1; | |
3905 | } | |
3906 | ||
3907 | break; | |
3908 | ||
3909 | case IEEE80211_STYPE_PROBE_REQ: | |
3910 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && | |
3911 | !iwl_is_associated(priv)) { | |
3912 | IWL_DEBUG_DROP("Dropping (non network): " | |
3913 | MAC_FMT ", " MAC_FMT ", " | |
3914 | MAC_FMT "\n", | |
3915 | MAC_ARG(header->addr1), | |
3916 | MAC_ARG(header->addr2), | |
3917 | MAC_ARG(header->addr3)); | |
3918 | return; | |
3919 | } | |
3920 | } | |
3921 | iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats); | |
3922 | break; | |
3923 | ||
3924 | case IEEE80211_FTYPE_CTL: | |
3925 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
3926 | switch (fc & IEEE80211_FCTL_STYPE) { | |
3927 | case IEEE80211_STYPE_BACK_REQ: | |
3928 | IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n"); | |
3929 | iwl4965_handle_data_packet(priv, 0, include_phy, | |
3930 | rxb, &stats); | |
3931 | break; | |
3932 | default: | |
3933 | break; | |
3934 | } | |
3935 | #endif | |
3936 | ||
3937 | break; | |
3938 | ||
3939 | case IEEE80211_FTYPE_DATA: | |
3940 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) | |
3941 | iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM, | |
3942 | header->addr2); | |
3943 | ||
3944 | if (unlikely(!network_packet)) | |
3945 | IWL_DEBUG_DROP("Dropping (non network): " | |
3946 | MAC_FMT ", " MAC_FMT ", " | |
3947 | MAC_FMT "\n", | |
3948 | MAC_ARG(header->addr1), | |
3949 | MAC_ARG(header->addr2), | |
3950 | MAC_ARG(header->addr3)); | |
3951 | else if (unlikely(is_duplicate_packet(priv, header))) | |
3952 | IWL_DEBUG_DROP("Dropping (dup): " MAC_FMT ", " | |
3953 | MAC_FMT ", " MAC_FMT "\n", | |
3954 | MAC_ARG(header->addr1), | |
3955 | MAC_ARG(header->addr2), | |
3956 | MAC_ARG(header->addr3)); | |
3957 | else | |
3958 | iwl4965_handle_data_packet(priv, 1, include_phy, rxb, | |
3959 | &stats); | |
3960 | break; | |
3961 | default: | |
3962 | break; | |
3963 | ||
3964 | } | |
3965 | } | |
3966 | ||
3967 | /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). | |
3968 | * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ | |
3969 | static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv, | |
3970 | struct iwl_rx_mem_buffer *rxb) | |
3971 | { | |
3972 | struct iwl_rx_packet *pkt = (void *)rxb->skb->data; | |
3973 | priv->last_phy_res[0] = 1; | |
3974 | memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]), | |
3975 | sizeof(struct iwl4965_rx_phy_res)); | |
3976 | } | |
3977 | ||
3978 | static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv, | |
3979 | struct iwl_rx_mem_buffer *rxb) | |
3980 | ||
3981 | { | |
3982 | #ifdef CONFIG_IWLWIFI_SENSITIVITY | |
3983 | struct iwl_rx_packet *pkt = (void *)rxb->skb->data; | |
3984 | struct iwl_missed_beacon_notif *missed_beacon; | |
3985 | ||
3986 | missed_beacon = &pkt->u.missed_beacon; | |
3987 | if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) { | |
3988 | IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", | |
3989 | le32_to_cpu(missed_beacon->consequtive_missed_beacons), | |
3990 | le32_to_cpu(missed_beacon->total_missed_becons), | |
3991 | le32_to_cpu(missed_beacon->num_recvd_beacons), | |
3992 | le32_to_cpu(missed_beacon->num_expected_beacons)); | |
3993 | priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT; | |
3994 | if (unlikely(!test_bit(STATUS_SCANNING, &priv->status))) | |
3995 | queue_work(priv->workqueue, &priv->sensitivity_work); | |
3996 | } | |
3997 | #endif /*CONFIG_IWLWIFI_SENSITIVITY*/ | |
3998 | } | |
3999 | ||
4000 | #ifdef CONFIG_IWLWIFI_HT | |
4001 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
4002 | ||
4003 | static void iwl4965_set_tx_status(struct iwl_priv *priv, int txq_id, int idx, | |
4004 | u32 status, u32 retry_count, u32 rate) | |
4005 | { | |
4006 | struct ieee80211_tx_status *tx_status = | |
4007 | &(priv->txq[txq_id].txb[idx].status); | |
4008 | ||
4009 | tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0; | |
4010 | tx_status->retry_count += retry_count; | |
4011 | tx_status->control.tx_rate = rate; | |
4012 | } | |
4013 | ||
4014 | ||
4015 | static void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, | |
4016 | int sta_id, int tid) | |
4017 | { | |
4018 | unsigned long flags; | |
4019 | ||
4020 | spin_lock_irqsave(&priv->sta_lock, flags); | |
4021 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; | |
4022 | priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); | |
4023 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
4024 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
4025 | ||
4026 | iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); | |
4027 | } | |
4028 | ||
4029 | ||
4030 | static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv, | |
4031 | struct iwl_ht_agg *agg, | |
4032 | struct iwl_compressed_ba_resp* | |
4033 | ba_resp) | |
4034 | ||
4035 | { | |
4036 | int i, sh, ack; | |
4037 | u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl); | |
4038 | u32 bitmap0, bitmap1; | |
4039 | u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0); | |
4040 | u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1); | |
4041 | ||
4042 | if (unlikely(!agg->wait_for_ba)) { | |
4043 | IWL_ERROR("Received BA when not expected\n"); | |
4044 | return -EINVAL; | |
4045 | } | |
4046 | agg->wait_for_ba = 0; | |
4047 | IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl); | |
4048 | sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl>>4); | |
4049 | if (sh < 0) /* tbw something is wrong with indeces */ | |
4050 | sh += 0x100; | |
4051 | ||
4052 | /* don't use 64 bits for now */ | |
4053 | bitmap0 = resp_bitmap0 >> sh; | |
4054 | bitmap1 = resp_bitmap1 >> sh; | |
4055 | bitmap0 |= (resp_bitmap1 & ((1<<sh)|((1<<sh)-1))) << (32 - sh); | |
4056 | ||
4057 | if (agg->frame_count > (64 - sh)) { | |
4058 | IWL_DEBUG_TX_REPLY("more frames than bitmap size"); | |
4059 | return -1; | |
4060 | } | |
4061 | ||
4062 | /* check for success or failure according to the | |
4063 | * transmitted bitmap and back bitmap */ | |
4064 | bitmap0 &= agg->bitmap0; | |
4065 | bitmap1 &= agg->bitmap1; | |
4066 | ||
4067 | for (i = 0; i < agg->frame_count ; i++) { | |
4068 | int idx = (agg->start_idx + i) & 0xff; | |
4069 | ack = bitmap0 & (1 << i); | |
4070 | IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", | |
4071 | ack? "ACK":"NACK", i, idx, agg->start_idx + i); | |
4072 | iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0, | |
4073 | agg->rate_n_flags); | |
4074 | ||
4075 | } | |
4076 | ||
4077 | IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1); | |
4078 | ||
4079 | return 0; | |
4080 | } | |
4081 | ||
4082 | static inline int iwl_queue_dec_wrap(int index, int n_bd) | |
4083 | { | |
4084 | return (index == 0) ? n_bd - 1 : index - 1; | |
4085 | } | |
4086 | ||
4087 | static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv, | |
4088 | struct iwl_rx_mem_buffer *rxb) | |
4089 | { | |
4090 | struct iwl_rx_packet *pkt = (void *)rxb->skb->data; | |
4091 | struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; | |
4092 | int index; | |
4093 | struct iwl_tx_queue *txq = NULL; | |
4094 | struct iwl_ht_agg *agg; | |
4095 | u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow); | |
4096 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); | |
4097 | ||
4098 | if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) { | |
4099 | IWL_ERROR("BUG_ON scd_flow is bigger than number of queues"); | |
4100 | return; | |
4101 | } | |
4102 | ||
4103 | txq = &priv->txq[ba_resp_scd_flow]; | |
4104 | agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg; | |
4105 | index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); | |
4106 | ||
4107 | /* TODO: Need to get this copy more sefely - now good for debug */ | |
4108 | /* | |
4109 | IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from " MAC_FMT ", | |
4110 | sta_id = %d\n", | |
4111 | agg->wait_for_ba, | |
4112 | MAC_ARG((u8*) &ba_resp->sta_addr_lo32), | |
4113 | ba_resp->sta_id); | |
4114 | IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = " | |
4115 | "%d, scd_ssn = %d\n", | |
4116 | ba_resp->tid, | |
4117 | ba_resp->ba_seq_ctl, | |
4118 | ba_resp->ba_bitmap1, | |
4119 | ba_resp->ba_bitmap0, | |
4120 | ba_resp->scd_flow, | |
4121 | ba_resp->scd_ssn); | |
4122 | IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n", | |
4123 | agg->start_idx, | |
4124 | agg->bitmap1, | |
4125 | agg->bitmap0); | |
4126 | */ | |
4127 | iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp); | |
4128 | /* releases all the TFDs until the SSN */ | |
4129 | if (txq->q.last_used != (ba_resp_scd_ssn & 0xff)) | |
4130 | iwl_tx_queue_reclaim(priv, ba_resp_scd_flow, index); | |
4131 | ||
4132 | } | |
4133 | ||
4134 | ||
4135 | static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv, u16 txq_id) | |
4136 | { | |
4137 | iwl_write_restricted_reg(priv, | |
4138 | SCD_QUEUE_STATUS_BITS(txq_id), | |
4139 | (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)| | |
4140 | (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); | |
4141 | } | |
4142 | ||
4143 | static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid, | |
4144 | u16 txq_id) | |
4145 | { | |
4146 | u32 tbl_dw_addr; | |
4147 | u32 tbl_dw; | |
4148 | u16 scd_q2ratid; | |
4149 | ||
4150 | scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK; | |
4151 | ||
4152 | tbl_dw_addr = priv->scd_base_addr + | |
4153 | SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); | |
4154 | ||
4155 | tbl_dw = iwl_read_restricted_mem(priv, tbl_dw_addr); | |
4156 | ||
4157 | if (txq_id & 0x1) | |
4158 | tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF); | |
4159 | else | |
4160 | tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000); | |
4161 | ||
4162 | iwl_write_restricted_mem(priv, tbl_dw_addr, tbl_dw); | |
4163 | ||
4164 | return 0; | |
4165 | } | |
4166 | ||
4167 | /** | |
4168 | * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID | |
4169 | */ | |
4170 | static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id, | |
4171 | int tx_fifo, int sta_id, int tid, | |
4172 | u16 ssn_idx) | |
4173 | { | |
4174 | unsigned long flags; | |
4175 | int rc; | |
4176 | u16 ra_tid; | |
4177 | ||
4178 | if (IWL_BACK_QUEUE_FIRST_ID > txq_id) | |
4179 | IWL_WARNING("queue number too small: %d, must be > %d\n", | |
4180 | txq_id, IWL_BACK_QUEUE_FIRST_ID); | |
4181 | ||
4182 | ra_tid = BUILD_RAxTID(sta_id, tid); | |
4183 | ||
4184 | iwl_sta_modify_enable_tid_tx(priv, sta_id, tid); | |
4185 | ||
4186 | spin_lock_irqsave(&priv->lock, flags); | |
4187 | rc = iwl_grab_restricted_access(priv); | |
4188 | if (rc) { | |
4189 | spin_unlock_irqrestore(&priv->lock, flags); | |
4190 | return rc; | |
4191 | } | |
4192 | ||
4193 | iwl4965_tx_queue_stop_scheduler(priv, txq_id); | |
4194 | ||
4195 | iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id); | |
4196 | ||
4197 | ||
4198 | iwl_set_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1<<txq_id)); | |
4199 | ||
4200 | priv->txq[txq_id].q.last_used = (ssn_idx & 0xff); | |
4201 | priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff); | |
4202 | ||
4203 | /* supposes that ssn_idx is valid (!= 0xFFF) */ | |
4204 | iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx); | |
4205 | ||
4206 | iwl_write_restricted_mem(priv, | |
4207 | priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id), | |
4208 | (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & | |
4209 | SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); | |
4210 | ||
4211 | iwl_write_restricted_mem(priv, priv->scd_base_addr + | |
4212 | SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), | |
4213 | (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) | |
4214 | & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); | |
4215 | ||
4216 | iwl_set_bits_restricted_reg(priv, SCD_INTERRUPT_MASK, (1 << txq_id)); | |
4217 | ||
4218 | iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1); | |
4219 | ||
4220 | iwl_release_restricted_access(priv); | |
4221 | spin_unlock_irqrestore(&priv->lock, flags); | |
4222 | ||
4223 | return 0; | |
4224 | } | |
4225 | ||
4226 | /** | |
4227 | * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID | |
4228 | */ | |
4229 | static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id, | |
4230 | u16 ssn_idx, u8 tx_fifo) | |
4231 | { | |
4232 | unsigned long flags; | |
4233 | int rc; | |
4234 | ||
4235 | if (IWL_BACK_QUEUE_FIRST_ID > txq_id) { | |
4236 | IWL_WARNING("queue number too small: %d, must be > %d\n", | |
4237 | txq_id, IWL_BACK_QUEUE_FIRST_ID); | |
4238 | return -EINVAL; | |
4239 | } | |
4240 | ||
4241 | spin_lock_irqsave(&priv->lock, flags); | |
4242 | rc = iwl_grab_restricted_access(priv); | |
4243 | if (rc) { | |
4244 | spin_unlock_irqrestore(&priv->lock, flags); | |
4245 | return rc; | |
4246 | } | |
4247 | ||
4248 | iwl4965_tx_queue_stop_scheduler(priv, txq_id); | |
4249 | ||
4250 | iwl_clear_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1 << txq_id)); | |
4251 | ||
4252 | priv->txq[txq_id].q.last_used = (ssn_idx & 0xff); | |
4253 | priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff); | |
4254 | /* supposes that ssn_idx is valid (!= 0xFFF) */ | |
4255 | iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx); | |
4256 | ||
4257 | iwl_clear_bits_restricted_reg(priv, SCD_INTERRUPT_MASK, (1 << txq_id)); | |
4258 | iwl4965_txq_ctx_deactivate(priv, txq_id); | |
4259 | iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0); | |
4260 | ||
4261 | iwl_release_restricted_access(priv); | |
4262 | spin_unlock_irqrestore(&priv->lock, flags); | |
4263 | ||
4264 | return 0; | |
4265 | } | |
4266 | ||
4267 | #endif/* CONFIG_IWLWIFI_HT_AGG */ | |
4268 | #endif /* CONFIG_IWLWIFI_HT */ | |
4269 | /* | |
4270 | * RATE SCALE CODE | |
4271 | */ | |
4272 | int iwl4965_init_hw_rates(struct iwl_priv *priv, struct ieee80211_rate *rates) | |
4273 | { | |
4274 | return 0; | |
4275 | } | |
4276 | ||
4277 | ||
4278 | /** | |
4279 | * iwl4965_add_station - Initialize a station's hardware rate table | |
4280 | * | |
4281 | * The uCode contains a table of fallback rates and retries per rate | |
4282 | * for automatic fallback during transmission. | |
4283 | * | |
4284 | * NOTE: This initializes the table for a single retry per data rate | |
4285 | * which is not optimal. Setting up an intelligent retry per rate | |
4286 | * requires feedback from transmission, which isn't exposed through | |
4287 | * rc80211_simple which is what this driver is currently using. | |
4288 | * | |
4289 | */ | |
4290 | void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap) | |
4291 | { | |
4292 | int i, r; | |
4293 | struct iwl_link_quality_cmd link_cmd = { | |
4294 | .reserved1 = 0, | |
4295 | }; | |
4296 | u16 rate_flags; | |
4297 | ||
4298 | /* Set up the rate scaling to start at 54M and fallback | |
4299 | * all the way to 1M in IEEE order and then spin on IEEE */ | |
4300 | if (is_ap) | |
4301 | r = IWL_RATE_54M_INDEX; | |
4302 | else if (priv->phymode == MODE_IEEE80211A) | |
4303 | r = IWL_RATE_6M_INDEX; | |
4304 | else | |
4305 | r = IWL_RATE_1M_INDEX; | |
4306 | ||
4307 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
4308 | rate_flags = 0; | |
4309 | if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE) | |
4310 | rate_flags |= RATE_MCS_CCK_MSK; | |
4311 | ||
4312 | rate_flags |= RATE_MCS_ANT_B_MSK; | |
4313 | rate_flags &= ~RATE_MCS_ANT_A_MSK; | |
4314 | link_cmd.rs_table[i].rate_n_flags = | |
4315 | iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags); | |
4316 | r = iwl_get_prev_ieee_rate(r); | |
4317 | } | |
4318 | ||
4319 | link_cmd.general_params.single_stream_ant_msk = 2; | |
4320 | link_cmd.general_params.dual_stream_ant_msk = 3; | |
4321 | link_cmd.agg_params.agg_dis_start_th = 3; | |
4322 | link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000); | |
4323 | ||
4324 | /* Update the rate scaling for control frame Tx to AP */ | |
4325 | link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID; | |
4326 | ||
4327 | iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd), | |
4328 | &link_cmd); | |
4329 | } | |
4330 | ||
4331 | #ifdef CONFIG_IWLWIFI_HT | |
4332 | ||
4333 | static u8 iwl_is_channel_extension(struct iwl_priv *priv, int phymode, | |
4334 | u16 channel, u8 extension_chan_offset) | |
4335 | { | |
4336 | const struct iwl_channel_info *ch_info; | |
4337 | ||
4338 | ch_info = iwl_get_channel_info(priv, phymode, channel); | |
4339 | if (!is_channel_valid(ch_info)) | |
4340 | return 0; | |
4341 | ||
4342 | if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO) | |
4343 | return 0; | |
4344 | ||
4345 | if ((ch_info->fat_extension_channel == extension_chan_offset) || | |
4346 | (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX)) | |
4347 | return 1; | |
4348 | ||
4349 | return 0; | |
4350 | } | |
4351 | ||
4352 | static u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv, | |
4353 | const struct sta_ht_info *ht_info) | |
4354 | { | |
4355 | ||
4356 | if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ) | |
4357 | return 0; | |
4358 | ||
4359 | if (ht_info->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) | |
4360 | return 0; | |
4361 | ||
4362 | if (ht_info->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO) | |
4363 | return 0; | |
4364 | ||
4365 | /* no fat tx allowed on 2.4GHZ */ | |
4366 | if (priv->phymode != MODE_IEEE80211A) | |
4367 | return 0; | |
4368 | return (iwl_is_channel_extension(priv, priv->phymode, | |
4369 | ht_info->control_channel, | |
4370 | ht_info->extension_chan_offset)); | |
4371 | } | |
4372 | ||
4373 | void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct sta_ht_info *ht_info) | |
4374 | { | |
4375 | struct iwl_rxon_cmd *rxon = &priv->staging_rxon; | |
4376 | u32 val; | |
4377 | ||
4378 | if (!ht_info->is_ht) | |
4379 | return; | |
4380 | ||
4381 | if (iwl_is_fat_tx_allowed(priv, ht_info)) | |
4382 | rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK; | |
4383 | else | |
4384 | rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK | | |
4385 | RXON_FLG_CHANNEL_MODE_PURE_40_MSK); | |
4386 | ||
4387 | if (le16_to_cpu(rxon->channel) != ht_info->control_channel) { | |
4388 | IWL_DEBUG_ASSOC("control diff than current %d %d\n", | |
4389 | le16_to_cpu(rxon->channel), | |
4390 | ht_info->control_channel); | |
4391 | rxon->channel = cpu_to_le16(ht_info->control_channel); | |
4392 | return; | |
4393 | } | |
4394 | ||
4395 | /* Note: control channel is oposit to extension channel */ | |
4396 | switch (ht_info->extension_chan_offset) { | |
4397 | case IWL_EXT_CHANNEL_OFFSET_ABOVE: | |
4398 | rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); | |
4399 | break; | |
4400 | case IWL_EXT_CHANNEL_OFFSET_BELOW: | |
4401 | rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; | |
4402 | break; | |
4403 | case IWL_EXT_CHANNEL_OFFSET_AUTO: | |
4404 | rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK; | |
4405 | break; | |
4406 | default: | |
4407 | rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK; | |
4408 | break; | |
4409 | } | |
4410 | ||
4411 | val = ht_info->operating_mode; | |
4412 | ||
4413 | rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS); | |
4414 | ||
4415 | priv->active_rate_ht[0] = ht_info->supp_rates[0]; | |
4416 | priv->active_rate_ht[1] = ht_info->supp_rates[1]; | |
4417 | iwl4965_set_rxon_chain(priv); | |
4418 | ||
4419 | IWL_DEBUG_ASSOC("supported HT rate 0x%X %X " | |
4420 | "rxon flags 0x%X operation mode :0x%X " | |
4421 | "extension channel offset 0x%x " | |
4422 | "control chan %d\n", | |
4423 | priv->active_rate_ht[0], priv->active_rate_ht[1], | |
4424 | le32_to_cpu(rxon->flags), ht_info->operating_mode, | |
4425 | ht_info->extension_chan_offset, | |
4426 | ht_info->control_channel); | |
4427 | return; | |
4428 | } | |
4429 | ||
4430 | void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index) | |
4431 | { | |
4432 | __le32 sta_flags; | |
4433 | struct sta_ht_info *ht_info = &priv->current_assoc_ht; | |
4434 | ||
4435 | priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ; | |
4436 | if (!ht_info->is_ht) | |
4437 | goto done; | |
4438 | ||
4439 | sta_flags = priv->stations[index].sta.station_flags; | |
4440 | ||
4441 | if (ht_info->tx_mimo_ps_mode == IWL_MIMO_PS_DYNAMIC) | |
4442 | sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; | |
4443 | else | |
4444 | sta_flags &= ~STA_FLG_RTS_MIMO_PROT_MSK; | |
4445 | ||
4446 | sta_flags |= cpu_to_le32( | |
4447 | (u32)ht_info->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); | |
4448 | ||
4449 | sta_flags |= cpu_to_le32( | |
4450 | (u32)ht_info->mpdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); | |
4451 | ||
4452 | sta_flags &= (~STA_FLG_FAT_EN_MSK); | |
4453 | ht_info->tx_chan_width = IWL_CHANNEL_WIDTH_20MHZ; | |
4454 | ht_info->chan_width_cap = IWL_CHANNEL_WIDTH_20MHZ; | |
4455 | ||
4456 | if (iwl_is_fat_tx_allowed(priv, ht_info)) { | |
4457 | sta_flags |= STA_FLG_FAT_EN_MSK; | |
4458 | ht_info->chan_width_cap = IWL_CHANNEL_WIDTH_40MHZ; | |
4459 | if (ht_info->supported_chan_width == IWL_CHANNEL_WIDTH_40MHZ) | |
4460 | ht_info->tx_chan_width = IWL_CHANNEL_WIDTH_40MHZ; | |
4461 | } | |
4462 | priv->current_channel_width = ht_info->tx_chan_width; | |
4463 | priv->stations[index].sta.station_flags = sta_flags; | |
4464 | done: | |
4465 | return; | |
4466 | } | |
4467 | ||
4468 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
4469 | ||
4470 | static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv, | |
4471 | int sta_id, int tid, u16 ssn) | |
4472 | { | |
4473 | unsigned long flags; | |
4474 | ||
4475 | spin_lock_irqsave(&priv->sta_lock, flags); | |
4476 | priv->stations[sta_id].sta.station_flags_msk = 0; | |
4477 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; | |
4478 | priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; | |
4479 | priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); | |
4480 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
4481 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
4482 | ||
4483 | iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); | |
4484 | } | |
4485 | ||
4486 | static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv, | |
4487 | int sta_id, int tid) | |
4488 | { | |
4489 | unsigned long flags; | |
4490 | ||
4491 | spin_lock_irqsave(&priv->sta_lock, flags); | |
4492 | priv->stations[sta_id].sta.station_flags_msk = 0; | |
4493 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; | |
4494 | priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; | |
4495 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
4496 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
4497 | ||
4498 | iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); | |
4499 | } | |
4500 | ||
4501 | static const u16 default_tid_to_tx_fifo[] = { | |
4502 | IWL_TX_FIFO_AC1, | |
4503 | IWL_TX_FIFO_AC0, | |
4504 | IWL_TX_FIFO_AC0, | |
4505 | IWL_TX_FIFO_AC1, | |
4506 | IWL_TX_FIFO_AC2, | |
4507 | IWL_TX_FIFO_AC2, | |
4508 | IWL_TX_FIFO_AC3, | |
4509 | IWL_TX_FIFO_AC3, | |
4510 | IWL_TX_FIFO_NONE, | |
4511 | IWL_TX_FIFO_NONE, | |
4512 | IWL_TX_FIFO_NONE, | |
4513 | IWL_TX_FIFO_NONE, | |
4514 | IWL_TX_FIFO_NONE, | |
4515 | IWL_TX_FIFO_NONE, | |
4516 | IWL_TX_FIFO_NONE, | |
4517 | IWL_TX_FIFO_NONE, | |
4518 | IWL_TX_FIFO_AC3 | |
4519 | }; | |
4520 | ||
4521 | static int iwl_txq_ctx_activate_free(struct iwl_priv *priv) | |
4522 | { | |
4523 | int txq_id; | |
4524 | ||
4525 | for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) | |
4526 | if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) | |
4527 | return txq_id; | |
4528 | return -1; | |
4529 | } | |
4530 | ||
4531 | int iwl_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid, | |
4532 | u16 *start_seq_num) | |
4533 | { | |
4534 | ||
4535 | struct iwl_priv *priv = hw->priv; | |
4536 | int sta_id; | |
4537 | int tx_fifo; | |
4538 | int txq_id; | |
4539 | int ssn = -1; | |
4540 | unsigned long flags; | |
4541 | struct iwl_tid_data *tid_data; | |
4542 | ||
4543 | if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) | |
4544 | tx_fifo = default_tid_to_tx_fifo[tid]; | |
4545 | else | |
4546 | return -EINVAL; | |
4547 | ||
4548 | IWL_WARNING("iwl-AGG iwl_mac_ht_tx_agg_start on da=" MAC_FMT | |
4549 | " tid=%d\n", MAC_ARG(da), tid); | |
4550 | ||
4551 | sta_id = iwl_hw_find_station(priv, da); | |
4552 | if (sta_id == IWL_INVALID_STATION) | |
4553 | return -ENXIO; | |
4554 | ||
4555 | txq_id = iwl_txq_ctx_activate_free(priv); | |
4556 | if (txq_id == -1) | |
4557 | return -ENXIO; | |
4558 | ||
4559 | spin_lock_irqsave(&priv->sta_lock, flags); | |
4560 | tid_data = &priv->stations[sta_id].tid[tid]; | |
4561 | ssn = SEQ_TO_SN(tid_data->seq_number); | |
4562 | tid_data->agg.txq_id = txq_id; | |
4563 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
4564 | ||
4565 | *start_seq_num = ssn; | |
4566 | iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE); | |
4567 | return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo, | |
4568 | sta_id, tid, ssn); | |
4569 | } | |
4570 | ||
4571 | ||
4572 | int iwl_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid, | |
4573 | int generator) | |
4574 | { | |
4575 | ||
4576 | struct iwl_priv *priv = hw->priv; | |
4577 | int tx_fifo_id, txq_id, sta_id, ssn = -1; | |
4578 | struct iwl_tid_data *tid_data; | |
4579 | int rc; | |
4580 | if (!da) { | |
4581 | IWL_ERROR("%s: da = NULL\n", __func__); | |
4582 | return -EINVAL; | |
4583 | } | |
4584 | ||
4585 | if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) | |
4586 | tx_fifo_id = default_tid_to_tx_fifo[tid]; | |
4587 | else | |
4588 | return -EINVAL; | |
4589 | ||
4590 | sta_id = iwl_hw_find_station(priv, da); | |
4591 | ||
4592 | if (sta_id == IWL_INVALID_STATION) | |
4593 | return -ENXIO; | |
4594 | ||
4595 | tid_data = &priv->stations[sta_id].tid[tid]; | |
4596 | ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; | |
4597 | txq_id = tid_data->agg.txq_id; | |
4598 | ||
4599 | rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id); | |
4600 | /* FIXME: need more safe way to handle error condition */ | |
4601 | if (rc) | |
4602 | return rc; | |
4603 | ||
4604 | iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA); | |
4605 | IWL_DEBUG_INFO("iwl_mac_ht_tx_agg_stop on da=" MAC_FMT " tid=%d\n", | |
4606 | MAC_ARG(da), tid); | |
4607 | ||
4608 | return 0; | |
4609 | } | |
4610 | ||
4611 | int iwl_mac_ht_rx_agg_start(struct ieee80211_hw *hw, u8 *da, | |
4612 | u16 tid, u16 start_seq_num) | |
4613 | { | |
4614 | struct iwl_priv *priv = hw->priv; | |
4615 | int sta_id; | |
4616 | ||
4617 | IWL_WARNING("iwl-AGG iwl_mac_ht_rx_agg_start on da=" MAC_FMT | |
4618 | " tid=%d\n", MAC_ARG(da), tid); | |
4619 | sta_id = iwl_hw_find_station(priv, da); | |
4620 | iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, start_seq_num); | |
4621 | return 0; | |
4622 | } | |
4623 | ||
4624 | int iwl_mac_ht_rx_agg_stop(struct ieee80211_hw *hw, u8 *da, | |
4625 | u16 tid, int generator) | |
4626 | { | |
4627 | struct iwl_priv *priv = hw->priv; | |
4628 | int sta_id; | |
4629 | ||
4630 | IWL_WARNING("iwl-AGG iwl_mac_ht_rx_agg_stop on da=" MAC_FMT " tid=%d\n", | |
4631 | MAC_ARG(da), tid); | |
4632 | sta_id = iwl_hw_find_station(priv, da); | |
4633 | iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid); | |
4634 | return 0; | |
4635 | } | |
4636 | ||
4637 | #endif /* CONFIG_IWLWIFI_HT_AGG */ | |
4638 | #endif /* CONFIG_IWLWIFI_HT */ | |
4639 | ||
4640 | /* Set up 4965-specific Rx frame reply handlers */ | |
4641 | void iwl_hw_rx_handler_setup(struct iwl_priv *priv) | |
4642 | { | |
4643 | /* Legacy Rx frames */ | |
4644 | priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx; | |
4645 | ||
4646 | /* High-throughput (HT) Rx frames */ | |
4647 | priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy; | |
4648 | priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx; | |
4649 | ||
4650 | priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] = | |
4651 | iwl4965_rx_missed_beacon_notif; | |
4652 | ||
4653 | #ifdef CONFIG_IWLWIFI_HT | |
4654 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
4655 | priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba; | |
4656 | #endif /* CONFIG_IWLWIFI_AGG */ | |
4657 | #endif /* CONFIG_IWLWIFI */ | |
4658 | } | |
4659 | ||
4660 | void iwl_hw_setup_deferred_work(struct iwl_priv *priv) | |
4661 | { | |
4662 | INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work); | |
4663 | INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work); | |
4664 | #ifdef CONFIG_IWLWIFI_SENSITIVITY | |
4665 | INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work); | |
4666 | #endif | |
4667 | #ifdef CONFIG_IWLWIFI_HT | |
4668 | #ifdef CONFIG_IWLWIFI_HT_AGG | |
4669 | INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work); | |
4670 | #endif /* CONFIG_IWLWIFI_AGG */ | |
4671 | #endif /* CONFIG_IWLWIFI_HT */ | |
4672 | init_timer(&priv->statistics_periodic); | |
4673 | priv->statistics_periodic.data = (unsigned long)priv; | |
4674 | priv->statistics_periodic.function = iwl4965_bg_statistics_periodic; | |
4675 | } | |
4676 | ||
4677 | void iwl_hw_cancel_deferred_work(struct iwl_priv *priv) | |
4678 | { | |
4679 | del_timer_sync(&priv->statistics_periodic); | |
4680 | ||
4681 | cancel_delayed_work(&priv->init_alive_start); | |
4682 | } | |
4683 | ||
4684 | struct pci_device_id iwl_hw_card_ids[] = { | |
4685 | {0x8086, 0x4229, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
4686 | {0x8086, 0x4230, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
4687 | {0} | |
4688 | }; | |
4689 | ||
4690 | int iwl_eeprom_aqcuire_semaphore(struct iwl_priv *priv) | |
4691 | { | |
4692 | u16 count; | |
4693 | int rc; | |
4694 | ||
4695 | for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) { | |
4696 | iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, | |
4697 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); | |
4698 | rc = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG, | |
4699 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, | |
4700 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, | |
4701 | EEPROM_SEM_TIMEOUT); | |
4702 | if (rc >= 0) { | |
4703 | IWL_DEBUG_IO("Aqcuired semaphore after %d tries.\n", | |
4704 | count+1); | |
4705 | return rc; | |
4706 | } | |
4707 | } | |
4708 | ||
4709 | return rc; | |
4710 | } | |
4711 | ||
4712 | inline void iwl_eeprom_release_semaphore(struct iwl_priv *priv) | |
4713 | { | |
4714 | iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG, | |
4715 | CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); | |
4716 | } | |
4717 | ||
4718 | ||
4719 | MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids); |