1 /*- 2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 3 * Copyright (c) 2004-2005 Atheros Communications, Inc. 4 * Copyright (c) 2006 Devicescape Software, Inc. 5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com> 6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu> 7 * 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer, 15 * without modification. 16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 17 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 18 * redistribution must be conditioned upon including a substantially 19 * similar Disclaimer requirement for further binary redistribution. 20 * 3. Neither the names of the above-listed copyright holders nor the names 21 * of any contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * Alternatively, this software may be distributed under the terms of the 25 * GNU General Public License ("GPL") version 2 as published by the Free 26 * Software Foundation. 27 * 28 * NO WARRANTY 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 32 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 33 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 34 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 37 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 39 * THE POSSIBILITY OF SUCH DAMAGES. 40 * 41 */ 42 43 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 44 45 #include <linux/module.h> 46 #include <linux/delay.h> 47 #include <linux/dma-mapping.h> 48 #include <linux/hardirq.h> 49 #include <linux/if.h> 50 #include <linux/io.h> 51 #include <linux/netdevice.h> 52 #include <linux/cache.h> 53 #include <linux/ethtool.h> 54 #include <linux/uaccess.h> 55 #include <linux/slab.h> 56 #include <linux/etherdevice.h> 57 #include <linux/nl80211.h> 58 59 #include <net/ieee80211_radiotap.h> 60 61 #include <asm/unaligned.h> 62 63 #include "base.h" 64 #include "reg.h" 65 #include "debug.h" 66 #include "ani.h" 67 #include "ath5k.h" 68 #include "../regd.h" 69 70 #define CREATE_TRACE_POINTS 71 #include "trace.h" 72 73 bool ath5k_modparam_nohwcrypt; 74 module_param_named(nohwcrypt, ath5k_modparam_nohwcrypt, bool, S_IRUGO); 75 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); 76 77 static bool modparam_fastchanswitch; 78 module_param_named(fastchanswitch, modparam_fastchanswitch, bool, S_IRUGO); 79 MODULE_PARM_DESC(fastchanswitch, "Enable fast channel switching for AR2413/AR5413 radios."); 80 81 static bool ath5k_modparam_no_hw_rfkill_switch; 82 module_param_named(no_hw_rfkill_switch, ath5k_modparam_no_hw_rfkill_switch, 83 bool, S_IRUGO); 84 MODULE_PARM_DESC(no_hw_rfkill_switch, "Ignore the GPIO RFKill switch state"); 85 86 87 /* Module info */ 88 MODULE_AUTHOR("Jiri Slaby"); 89 MODULE_AUTHOR("Nick Kossifidis"); 90 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards."); 91 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards"); 92 MODULE_LICENSE("Dual BSD/GPL"); 93 94 static int ath5k_init(struct ieee80211_hw *hw); 95 static int ath5k_reset(struct ath5k_hw *ah, struct ieee80211_channel *chan, 96 bool skip_pcu); 97 98 /* Known SREVs */ 99 static const struct ath5k_srev_name srev_names[] = { 100 #ifdef CONFIG_ATHEROS_AR231X 101 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 }, 102 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 }, 103 { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 }, 104 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 }, 105 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 }, 106 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 }, 107 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 }, 108 #else 109 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 }, 110 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 }, 111 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A }, 112 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B }, 113 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 }, 114 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 }, 115 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 }, 116 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A }, 117 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 }, 118 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 }, 119 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 }, 120 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 }, 121 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 }, 122 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 }, 123 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 }, 124 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 }, 125 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 }, 126 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 }, 127 #endif 128 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN }, 129 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 }, 130 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 }, 131 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A }, 132 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 }, 133 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 }, 134 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A }, 135 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B }, 136 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 }, 137 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A }, 138 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B }, 139 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 }, 140 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 }, 141 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 }, 142 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 }, 143 #ifdef CONFIG_ATHEROS_AR231X 144 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 }, 145 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 }, 146 #endif 147 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN }, 148 }; 149 150 static const struct ieee80211_rate ath5k_rates[] = { 151 { .bitrate = 10, 152 .hw_value = ATH5K_RATE_CODE_1M, }, 153 { .bitrate = 20, 154 .hw_value = ATH5K_RATE_CODE_2M, 155 .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE, 156 .flags = IEEE80211_RATE_SHORT_PREAMBLE }, 157 { .bitrate = 55, 158 .hw_value = ATH5K_RATE_CODE_5_5M, 159 .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE, 160 .flags = IEEE80211_RATE_SHORT_PREAMBLE }, 161 { .bitrate = 110, 162 .hw_value = ATH5K_RATE_CODE_11M, 163 .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE, 164 .flags = IEEE80211_RATE_SHORT_PREAMBLE }, 165 { .bitrate = 60, 166 .hw_value = ATH5K_RATE_CODE_6M, 167 .flags = 0 }, 168 { .bitrate = 90, 169 .hw_value = ATH5K_RATE_CODE_9M, 170 .flags = 0 }, 171 { .bitrate = 120, 172 .hw_value = ATH5K_RATE_CODE_12M, 173 .flags = 0 }, 174 { .bitrate = 180, 175 .hw_value = ATH5K_RATE_CODE_18M, 176 .flags = 0 }, 177 { .bitrate = 240, 178 .hw_value = ATH5K_RATE_CODE_24M, 179 .flags = 0 }, 180 { .bitrate = 360, 181 .hw_value = ATH5K_RATE_CODE_36M, 182 .flags = 0 }, 183 { .bitrate = 480, 184 .hw_value = ATH5K_RATE_CODE_48M, 185 .flags = 0 }, 186 { .bitrate = 540, 187 .hw_value = ATH5K_RATE_CODE_54M, 188 .flags = 0 }, 189 }; 190 191 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp) 192 { 193 u64 tsf = ath5k_hw_get_tsf64(ah); 194 195 if ((tsf & 0x7fff) < rstamp) 196 tsf -= 0x8000; 197 198 return (tsf & ~0x7fff) | rstamp; 199 } 200 201 const char * 202 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val) 203 { 204 const char *name = "xxxxx"; 205 unsigned int i; 206 207 for (i = 0; i < ARRAY_SIZE(srev_names); i++) { 208 if (srev_names[i].sr_type != type) 209 continue; 210 211 if ((val & 0xf0) == srev_names[i].sr_val) 212 name = srev_names[i].sr_name; 213 214 if ((val & 0xff) == srev_names[i].sr_val) { 215 name = srev_names[i].sr_name; 216 break; 217 } 218 } 219 220 return name; 221 } 222 static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset) 223 { 224 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv; 225 return ath5k_hw_reg_read(ah, reg_offset); 226 } 227 228 static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset) 229 { 230 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv; 231 ath5k_hw_reg_write(ah, val, reg_offset); 232 } 233 234 static const struct ath_ops ath5k_common_ops = { 235 .read = ath5k_ioread32, 236 .write = ath5k_iowrite32, 237 }; 238 239 /***********************\ 240 * Driver Initialization * 241 \***********************/ 242 243 static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) 244 { 245 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); 246 struct ath5k_hw *ah = hw->priv; 247 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah); 248 249 return ath_reg_notifier_apply(wiphy, request, regulatory); 250 } 251 252 /********************\ 253 * Channel/mode setup * 254 \********************/ 255 256 /* 257 * Returns true for the channel numbers used. 258 */ 259 #ifdef CONFIG_ATH5K_TEST_CHANNELS 260 static bool ath5k_is_standard_channel(short chan, enum ieee80211_band band) 261 { 262 return true; 263 } 264 265 #else 266 static bool ath5k_is_standard_channel(short chan, enum ieee80211_band band) 267 { 268 if (band == IEEE80211_BAND_2GHZ && chan <= 14) 269 return true; 270 271 return /* UNII 1,2 */ 272 (((chan & 3) == 0 && chan >= 36 && chan <= 64) || 273 /* midband */ 274 ((chan & 3) == 0 && chan >= 100 && chan <= 140) || 275 /* UNII-3 */ 276 ((chan & 3) == 1 && chan >= 149 && chan <= 165) || 277 /* 802.11j 5.030-5.080 GHz (20MHz) */ 278 (chan == 8 || chan == 12 || chan == 16) || 279 /* 802.11j 4.9GHz (20MHz) */ 280 (chan == 184 || chan == 188 || chan == 192 || chan == 196)); 281 } 282 #endif 283 284 static unsigned int 285 ath5k_setup_channels(struct ath5k_hw *ah, struct ieee80211_channel *channels, 286 unsigned int mode, unsigned int max) 287 { 288 unsigned int count, size, freq, ch; 289 enum ieee80211_band band; 290 291 switch (mode) { 292 case AR5K_MODE_11A: 293 /* 1..220, but 2GHz frequencies are filtered by check_channel */ 294 size = 220; 295 band = IEEE80211_BAND_5GHZ; 296 break; 297 case AR5K_MODE_11B: 298 case AR5K_MODE_11G: 299 size = 26; 300 band = IEEE80211_BAND_2GHZ; 301 break; 302 default: 303 ATH5K_WARN(ah, "bad mode, not copying channels\n"); 304 return 0; 305 } 306 307 count = 0; 308 for (ch = 1; ch <= size && count < max; ch++) { 309 freq = ieee80211_channel_to_frequency(ch, band); 310 311 if (freq == 0) /* mapping failed - not a standard channel */ 312 continue; 313 314 /* Write channel info, needed for ath5k_channel_ok() */ 315 channels[count].center_freq = freq; 316 channels[count].band = band; 317 channels[count].hw_value = mode; 318 319 /* Check if channel is supported by the chipset */ 320 if (!ath5k_channel_ok(ah, &channels[count])) 321 continue; 322 323 if (!ath5k_is_standard_channel(ch, band)) 324 continue; 325 326 count++; 327 } 328 329 return count; 330 } 331 332 static void 333 ath5k_setup_rate_idx(struct ath5k_hw *ah, struct ieee80211_supported_band *b) 334 { 335 u8 i; 336 337 for (i = 0; i < AR5K_MAX_RATES; i++) 338 ah->rate_idx[b->band][i] = -1; 339 340 for (i = 0; i < b->n_bitrates; i++) { 341 ah->rate_idx[b->band][b->bitrates[i].hw_value] = i; 342 if (b->bitrates[i].hw_value_short) 343 ah->rate_idx[b->band][b->bitrates[i].hw_value_short] = i; 344 } 345 } 346 347 static int 348 ath5k_setup_bands(struct ieee80211_hw *hw) 349 { 350 struct ath5k_hw *ah = hw->priv; 351 struct ieee80211_supported_band *sband; 352 int max_c, count_c = 0; 353 int i; 354 355 BUILD_BUG_ON(ARRAY_SIZE(ah->sbands) < IEEE80211_NUM_BANDS); 356 max_c = ARRAY_SIZE(ah->channels); 357 358 /* 2GHz band */ 359 sband = &ah->sbands[IEEE80211_BAND_2GHZ]; 360 sband->band = IEEE80211_BAND_2GHZ; 361 sband->bitrates = &ah->rates[IEEE80211_BAND_2GHZ][0]; 362 363 if (test_bit(AR5K_MODE_11G, ah->ah_capabilities.cap_mode)) { 364 /* G mode */ 365 memcpy(sband->bitrates, &ath5k_rates[0], 366 sizeof(struct ieee80211_rate) * 12); 367 sband->n_bitrates = 12; 368 369 sband->channels = ah->channels; 370 sband->n_channels = ath5k_setup_channels(ah, sband->channels, 371 AR5K_MODE_11G, max_c); 372 373 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband; 374 count_c = sband->n_channels; 375 max_c -= count_c; 376 } else if (test_bit(AR5K_MODE_11B, ah->ah_capabilities.cap_mode)) { 377 /* B mode */ 378 memcpy(sband->bitrates, &ath5k_rates[0], 379 sizeof(struct ieee80211_rate) * 4); 380 sband->n_bitrates = 4; 381 382 /* 5211 only supports B rates and uses 4bit rate codes 383 * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B) 384 * fix them up here: 385 */ 386 if (ah->ah_version == AR5K_AR5211) { 387 for (i = 0; i < 4; i++) { 388 sband->bitrates[i].hw_value = 389 sband->bitrates[i].hw_value & 0xF; 390 sband->bitrates[i].hw_value_short = 391 sband->bitrates[i].hw_value_short & 0xF; 392 } 393 } 394 395 sband->channels = ah->channels; 396 sband->n_channels = ath5k_setup_channels(ah, sband->channels, 397 AR5K_MODE_11B, max_c); 398 399 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband; 400 count_c = sband->n_channels; 401 max_c -= count_c; 402 } 403 ath5k_setup_rate_idx(ah, sband); 404 405 /* 5GHz band, A mode */ 406 if (test_bit(AR5K_MODE_11A, ah->ah_capabilities.cap_mode)) { 407 sband = &ah->sbands[IEEE80211_BAND_5GHZ]; 408 sband->band = IEEE80211_BAND_5GHZ; 409 sband->bitrates = &ah->rates[IEEE80211_BAND_5GHZ][0]; 410 411 memcpy(sband->bitrates, &ath5k_rates[4], 412 sizeof(struct ieee80211_rate) * 8); 413 sband->n_bitrates = 8; 414 415 sband->channels = &ah->channels[count_c]; 416 sband->n_channels = ath5k_setup_channels(ah, sband->channels, 417 AR5K_MODE_11A, max_c); 418 419 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband; 420 } 421 ath5k_setup_rate_idx(ah, sband); 422 423 ath5k_debug_dump_bands(ah); 424 425 return 0; 426 } 427 428 /* 429 * Set/change channels. We always reset the chip. 430 * To accomplish this we must first cleanup any pending DMA, 431 * then restart stuff after a la ath5k_init. 432 * 433 * Called with ah->lock. 434 */ 435 int 436 ath5k_chan_set(struct ath5k_hw *ah, struct ieee80211_channel *chan) 437 { 438 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 439 "channel set, resetting (%u -> %u MHz)\n", 440 ah->curchan->center_freq, chan->center_freq); 441 442 /* 443 * To switch channels clear any pending DMA operations; 444 * wait long enough for the RX fifo to drain, reset the 445 * hardware at the new frequency, and then re-enable 446 * the relevant bits of the h/w. 447 */ 448 return ath5k_reset(ah, chan, true); 449 } 450 451 void ath5k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) 452 { 453 struct ath5k_vif_iter_data *iter_data = data; 454 int i; 455 struct ath5k_vif *avf = (void *)vif->drv_priv; 456 457 if (iter_data->hw_macaddr) 458 for (i = 0; i < ETH_ALEN; i++) 459 iter_data->mask[i] &= 460 ~(iter_data->hw_macaddr[i] ^ mac[i]); 461 462 if (!iter_data->found_active) { 463 iter_data->found_active = true; 464 memcpy(iter_data->active_mac, mac, ETH_ALEN); 465 } 466 467 if (iter_data->need_set_hw_addr && iter_data->hw_macaddr) 468 if (ether_addr_equal(iter_data->hw_macaddr, mac)) 469 iter_data->need_set_hw_addr = false; 470 471 if (!iter_data->any_assoc) { 472 if (avf->assoc) 473 iter_data->any_assoc = true; 474 } 475 476 /* Calculate combined mode - when APs are active, operate in AP mode. 477 * Otherwise use the mode of the new interface. This can currently 478 * only deal with combinations of APs and STAs. Only one ad-hoc 479 * interfaces is allowed. 480 */ 481 if (avf->opmode == NL80211_IFTYPE_AP) 482 iter_data->opmode = NL80211_IFTYPE_AP; 483 else { 484 if (avf->opmode == NL80211_IFTYPE_STATION) 485 iter_data->n_stas++; 486 if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED) 487 iter_data->opmode = avf->opmode; 488 } 489 } 490 491 void 492 ath5k_update_bssid_mask_and_opmode(struct ath5k_hw *ah, 493 struct ieee80211_vif *vif) 494 { 495 struct ath_common *common = ath5k_hw_common(ah); 496 struct ath5k_vif_iter_data iter_data; 497 u32 rfilt; 498 499 /* 500 * Use the hardware MAC address as reference, the hardware uses it 501 * together with the BSSID mask when matching addresses. 502 */ 503 iter_data.hw_macaddr = common->macaddr; 504 memset(&iter_data.mask, 0xff, ETH_ALEN); 505 iter_data.found_active = false; 506 iter_data.need_set_hw_addr = true; 507 iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED; 508 iter_data.n_stas = 0; 509 510 if (vif) 511 ath5k_vif_iter(&iter_data, vif->addr, vif); 512 513 /* Get list of all active MAC addresses */ 514 ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter, 515 &iter_data); 516 memcpy(ah->bssidmask, iter_data.mask, ETH_ALEN); 517 518 ah->opmode = iter_data.opmode; 519 if (ah->opmode == NL80211_IFTYPE_UNSPECIFIED) 520 /* Nothing active, default to station mode */ 521 ah->opmode = NL80211_IFTYPE_STATION; 522 523 ath5k_hw_set_opmode(ah, ah->opmode); 524 ATH5K_DBG(ah, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n", 525 ah->opmode, ath_opmode_to_string(ah->opmode)); 526 527 if (iter_data.need_set_hw_addr && iter_data.found_active) 528 ath5k_hw_set_lladdr(ah, iter_data.active_mac); 529 530 if (ath5k_hw_hasbssidmask(ah)) 531 ath5k_hw_set_bssid_mask(ah, ah->bssidmask); 532 533 /* Set up RX Filter */ 534 if (iter_data.n_stas > 1) { 535 /* If you have multiple STA interfaces connected to 536 * different APs, ARPs are not received (most of the time?) 537 * Enabling PROMISC appears to fix that problem. 538 */ 539 ah->filter_flags |= AR5K_RX_FILTER_PROM; 540 } 541 542 rfilt = ah->filter_flags; 543 ath5k_hw_set_rx_filter(ah, rfilt); 544 ATH5K_DBG(ah, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt); 545 } 546 547 static inline int 548 ath5k_hw_to_driver_rix(struct ath5k_hw *ah, int hw_rix) 549 { 550 int rix; 551 552 /* return base rate on errors */ 553 if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES, 554 "hw_rix out of bounds: %x\n", hw_rix)) 555 return 0; 556 557 rix = ah->rate_idx[ah->curchan->band][hw_rix]; 558 if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix)) 559 rix = 0; 560 561 return rix; 562 } 563 564 /***************\ 565 * Buffers setup * 566 \***************/ 567 568 static 569 struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_hw *ah, dma_addr_t *skb_addr) 570 { 571 struct ath_common *common = ath5k_hw_common(ah); 572 struct sk_buff *skb; 573 574 /* 575 * Allocate buffer with headroom_needed space for the 576 * fake physical layer header at the start. 577 */ 578 skb = ath_rxbuf_alloc(common, 579 common->rx_bufsize, 580 GFP_ATOMIC); 581 582 if (!skb) { 583 ATH5K_ERR(ah, "can't alloc skbuff of size %u\n", 584 common->rx_bufsize); 585 return NULL; 586 } 587 588 *skb_addr = dma_map_single(ah->dev, 589 skb->data, common->rx_bufsize, 590 DMA_FROM_DEVICE); 591 592 if (unlikely(dma_mapping_error(ah->dev, *skb_addr))) { 593 ATH5K_ERR(ah, "%s: DMA mapping failed\n", __func__); 594 dev_kfree_skb(skb); 595 return NULL; 596 } 597 return skb; 598 } 599 600 static int 601 ath5k_rxbuf_setup(struct ath5k_hw *ah, struct ath5k_buf *bf) 602 { 603 struct sk_buff *skb = bf->skb; 604 struct ath5k_desc *ds; 605 int ret; 606 607 if (!skb) { 608 skb = ath5k_rx_skb_alloc(ah, &bf->skbaddr); 609 if (!skb) 610 return -ENOMEM; 611 bf->skb = skb; 612 } 613 614 /* 615 * Setup descriptors. For receive we always terminate 616 * the descriptor list with a self-linked entry so we'll 617 * not get overrun under high load (as can happen with a 618 * 5212 when ANI processing enables PHY error frames). 619 * 620 * To ensure the last descriptor is self-linked we create 621 * each descriptor as self-linked and add it to the end. As 622 * each additional descriptor is added the previous self-linked 623 * entry is "fixed" naturally. This should be safe even 624 * if DMA is happening. When processing RX interrupts we 625 * never remove/process the last, self-linked, entry on the 626 * descriptor list. This ensures the hardware always has 627 * someplace to write a new frame. 628 */ 629 ds = bf->desc; 630 ds->ds_link = bf->daddr; /* link to self */ 631 ds->ds_data = bf->skbaddr; 632 ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0); 633 if (ret) { 634 ATH5K_ERR(ah, "%s: could not setup RX desc\n", __func__); 635 return ret; 636 } 637 638 if (ah->rxlink != NULL) 639 *ah->rxlink = bf->daddr; 640 ah->rxlink = &ds->ds_link; 641 return 0; 642 } 643 644 static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb) 645 { 646 struct ieee80211_hdr *hdr; 647 enum ath5k_pkt_type htype; 648 __le16 fc; 649 650 hdr = (struct ieee80211_hdr *)skb->data; 651 fc = hdr->frame_control; 652 653 if (ieee80211_is_beacon(fc)) 654 htype = AR5K_PKT_TYPE_BEACON; 655 else if (ieee80211_is_probe_resp(fc)) 656 htype = AR5K_PKT_TYPE_PROBE_RESP; 657 else if (ieee80211_is_atim(fc)) 658 htype = AR5K_PKT_TYPE_ATIM; 659 else if (ieee80211_is_pspoll(fc)) 660 htype = AR5K_PKT_TYPE_PSPOLL; 661 else 662 htype = AR5K_PKT_TYPE_NORMAL; 663 664 return htype; 665 } 666 667 static int 668 ath5k_txbuf_setup(struct ath5k_hw *ah, struct ath5k_buf *bf, 669 struct ath5k_txq *txq, int padsize) 670 { 671 struct ath5k_desc *ds = bf->desc; 672 struct sk_buff *skb = bf->skb; 673 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 674 unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; 675 struct ieee80211_rate *rate; 676 unsigned int mrr_rate[3], mrr_tries[3]; 677 int i, ret; 678 u16 hw_rate; 679 u16 cts_rate = 0; 680 u16 duration = 0; 681 u8 rc_flags; 682 683 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; 684 685 /* XXX endianness */ 686 bf->skbaddr = dma_map_single(ah->dev, skb->data, skb->len, 687 DMA_TO_DEVICE); 688 689 rate = ieee80211_get_tx_rate(ah->hw, info); 690 if (!rate) { 691 ret = -EINVAL; 692 goto err_unmap; 693 } 694 695 if (info->flags & IEEE80211_TX_CTL_NO_ACK) 696 flags |= AR5K_TXDESC_NOACK; 697 698 rc_flags = info->control.rates[0].flags; 699 hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ? 700 rate->hw_value_short : rate->hw_value; 701 702 pktlen = skb->len; 703 704 /* FIXME: If we are in g mode and rate is a CCK rate 705 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta 706 * from tx power (value is in dB units already) */ 707 if (info->control.hw_key) { 708 keyidx = info->control.hw_key->hw_key_idx; 709 pktlen += info->control.hw_key->icv_len; 710 } 711 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { 712 flags |= AR5K_TXDESC_RTSENA; 713 cts_rate = ieee80211_get_rts_cts_rate(ah->hw, info)->hw_value; 714 duration = le16_to_cpu(ieee80211_rts_duration(ah->hw, 715 info->control.vif, pktlen, info)); 716 } 717 if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { 718 flags |= AR5K_TXDESC_CTSENA; 719 cts_rate = ieee80211_get_rts_cts_rate(ah->hw, info)->hw_value; 720 duration = le16_to_cpu(ieee80211_ctstoself_duration(ah->hw, 721 info->control.vif, pktlen, info)); 722 } 723 ret = ah->ah_setup_tx_desc(ah, ds, pktlen, 724 ieee80211_get_hdrlen_from_skb(skb), padsize, 725 get_hw_packet_type(skb), 726 (ah->power_level * 2), 727 hw_rate, 728 info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags, 729 cts_rate, duration); 730 if (ret) 731 goto err_unmap; 732 733 /* Set up MRR descriptor */ 734 if (ah->ah_capabilities.cap_has_mrr_support) { 735 memset(mrr_rate, 0, sizeof(mrr_rate)); 736 memset(mrr_tries, 0, sizeof(mrr_tries)); 737 for (i = 0; i < 3; i++) { 738 rate = ieee80211_get_alt_retry_rate(ah->hw, info, i); 739 if (!rate) 740 break; 741 742 mrr_rate[i] = rate->hw_value; 743 mrr_tries[i] = info->control.rates[i + 1].count; 744 } 745 746 ath5k_hw_setup_mrr_tx_desc(ah, ds, 747 mrr_rate[0], mrr_tries[0], 748 mrr_rate[1], mrr_tries[1], 749 mrr_rate[2], mrr_tries[2]); 750 } 751 752 ds->ds_link = 0; 753 ds->ds_data = bf->skbaddr; 754 755 spin_lock_bh(&txq->lock); 756 list_add_tail(&bf->list, &txq->q); 757 txq->txq_len++; 758 if (txq->link == NULL) /* is this first packet? */ 759 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr); 760 else /* no, so only link it */ 761 *txq->link = bf->daddr; 762 763 txq->link = &ds->ds_link; 764 ath5k_hw_start_tx_dma(ah, txq->qnum); 765 mmiowb(); 766 spin_unlock_bh(&txq->lock); 767 768 return 0; 769 err_unmap: 770 dma_unmap_single(ah->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE); 771 return ret; 772 } 773 774 /*******************\ 775 * Descriptors setup * 776 \*******************/ 777 778 static int 779 ath5k_desc_alloc(struct ath5k_hw *ah) 780 { 781 struct ath5k_desc *ds; 782 struct ath5k_buf *bf; 783 dma_addr_t da; 784 unsigned int i; 785 int ret; 786 787 /* allocate descriptors */ 788 ah->desc_len = sizeof(struct ath5k_desc) * 789 (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1); 790 791 ah->desc = dma_alloc_coherent(ah->dev, ah->desc_len, 792 &ah->desc_daddr, GFP_KERNEL); 793 if (ah->desc == NULL) { 794 ATH5K_ERR(ah, "can't allocate descriptors\n"); 795 ret = -ENOMEM; 796 goto err; 797 } 798 ds = ah->desc; 799 da = ah->desc_daddr; 800 ATH5K_DBG(ah, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n", 801 ds, ah->desc_len, (unsigned long long)ah->desc_daddr); 802 803 bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF, 804 sizeof(struct ath5k_buf), GFP_KERNEL); 805 if (bf == NULL) { 806 ATH5K_ERR(ah, "can't allocate bufptr\n"); 807 ret = -ENOMEM; 808 goto err_free; 809 } 810 ah->bufptr = bf; 811 812 INIT_LIST_HEAD(&ah->rxbuf); 813 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) { 814 bf->desc = ds; 815 bf->daddr = da; 816 list_add_tail(&bf->list, &ah->rxbuf); 817 } 818 819 INIT_LIST_HEAD(&ah->txbuf); 820 ah->txbuf_len = ATH_TXBUF; 821 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++, da += sizeof(*ds)) { 822 bf->desc = ds; 823 bf->daddr = da; 824 list_add_tail(&bf->list, &ah->txbuf); 825 } 826 827 /* beacon buffers */ 828 INIT_LIST_HEAD(&ah->bcbuf); 829 for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) { 830 bf->desc = ds; 831 bf->daddr = da; 832 list_add_tail(&bf->list, &ah->bcbuf); 833 } 834 835 return 0; 836 err_free: 837 dma_free_coherent(ah->dev, ah->desc_len, ah->desc, ah->desc_daddr); 838 err: 839 ah->desc = NULL; 840 return ret; 841 } 842 843 void 844 ath5k_txbuf_free_skb(struct ath5k_hw *ah, struct ath5k_buf *bf) 845 { 846 BUG_ON(!bf); 847 if (!bf->skb) 848 return; 849 dma_unmap_single(ah->dev, bf->skbaddr, bf->skb->len, 850 DMA_TO_DEVICE); 851 dev_kfree_skb_any(bf->skb); 852 bf->skb = NULL; 853 bf->skbaddr = 0; 854 bf->desc->ds_data = 0; 855 } 856 857 void 858 ath5k_rxbuf_free_skb(struct ath5k_hw *ah, struct ath5k_buf *bf) 859 { 860 struct ath_common *common = ath5k_hw_common(ah); 861 862 BUG_ON(!bf); 863 if (!bf->skb) 864 return; 865 dma_unmap_single(ah->dev, bf->skbaddr, common->rx_bufsize, 866 DMA_FROM_DEVICE); 867 dev_kfree_skb_any(bf->skb); 868 bf->skb = NULL; 869 bf->skbaddr = 0; 870 bf->desc->ds_data = 0; 871 } 872 873 static void 874 ath5k_desc_free(struct ath5k_hw *ah) 875 { 876 struct ath5k_buf *bf; 877 878 list_for_each_entry(bf, &ah->txbuf, list) 879 ath5k_txbuf_free_skb(ah, bf); 880 list_for_each_entry(bf, &ah->rxbuf, list) 881 ath5k_rxbuf_free_skb(ah, bf); 882 list_for_each_entry(bf, &ah->bcbuf, list) 883 ath5k_txbuf_free_skb(ah, bf); 884 885 /* Free memory associated with all descriptors */ 886 dma_free_coherent(ah->dev, ah->desc_len, ah->desc, ah->desc_daddr); 887 ah->desc = NULL; 888 ah->desc_daddr = 0; 889 890 kfree(ah->bufptr); 891 ah->bufptr = NULL; 892 } 893 894 895 /**************\ 896 * Queues setup * 897 \**************/ 898 899 static struct ath5k_txq * 900 ath5k_txq_setup(struct ath5k_hw *ah, 901 int qtype, int subtype) 902 { 903 struct ath5k_txq *txq; 904 struct ath5k_txq_info qi = { 905 .tqi_subtype = subtype, 906 /* XXX: default values not correct for B and XR channels, 907 * but who cares? */ 908 .tqi_aifs = AR5K_TUNE_AIFS, 909 .tqi_cw_min = AR5K_TUNE_CWMIN, 910 .tqi_cw_max = AR5K_TUNE_CWMAX 911 }; 912 int qnum; 913 914 /* 915 * Enable interrupts only for EOL and DESC conditions. 916 * We mark tx descriptors to receive a DESC interrupt 917 * when a tx queue gets deep; otherwise we wait for the 918 * EOL to reap descriptors. Note that this is done to 919 * reduce interrupt load and this only defers reaping 920 * descriptors, never transmitting frames. Aside from 921 * reducing interrupts this also permits more concurrency. 922 * The only potential downside is if the tx queue backs 923 * up in which case the top half of the kernel may backup 924 * due to a lack of tx descriptors. 925 */ 926 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE | 927 AR5K_TXQ_FLAG_TXDESCINT_ENABLE; 928 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi); 929 if (qnum < 0) { 930 /* 931 * NB: don't print a message, this happens 932 * normally on parts with too few tx queues 933 */ 934 return ERR_PTR(qnum); 935 } 936 txq = &ah->txqs[qnum]; 937 if (!txq->setup) { 938 txq->qnum = qnum; 939 txq->link = NULL; 940 INIT_LIST_HEAD(&txq->q); 941 spin_lock_init(&txq->lock); 942 txq->setup = true; 943 txq->txq_len = 0; 944 txq->txq_max = ATH5K_TXQ_LEN_MAX; 945 txq->txq_poll_mark = false; 946 txq->txq_stuck = 0; 947 } 948 return &ah->txqs[qnum]; 949 } 950 951 static int 952 ath5k_beaconq_setup(struct ath5k_hw *ah) 953 { 954 struct ath5k_txq_info qi = { 955 /* XXX: default values not correct for B and XR channels, 956 * but who cares? */ 957 .tqi_aifs = AR5K_TUNE_AIFS, 958 .tqi_cw_min = AR5K_TUNE_CWMIN, 959 .tqi_cw_max = AR5K_TUNE_CWMAX, 960 /* NB: for dynamic turbo, don't enable any other interrupts */ 961 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE 962 }; 963 964 return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi); 965 } 966 967 static int 968 ath5k_beaconq_config(struct ath5k_hw *ah) 969 { 970 struct ath5k_txq_info qi; 971 int ret; 972 973 ret = ath5k_hw_get_tx_queueprops(ah, ah->bhalq, &qi); 974 if (ret) 975 goto err; 976 977 if (ah->opmode == NL80211_IFTYPE_AP || 978 ah->opmode == NL80211_IFTYPE_MESH_POINT) { 979 /* 980 * Always burst out beacon and CAB traffic 981 * (aifs = cwmin = cwmax = 0) 982 */ 983 qi.tqi_aifs = 0; 984 qi.tqi_cw_min = 0; 985 qi.tqi_cw_max = 0; 986 } else if (ah->opmode == NL80211_IFTYPE_ADHOC) { 987 /* 988 * Adhoc mode; backoff between 0 and (2 * cw_min). 989 */ 990 qi.tqi_aifs = 0; 991 qi.tqi_cw_min = 0; 992 qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN; 993 } 994 995 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, 996 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n", 997 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max); 998 999 ret = ath5k_hw_set_tx_queueprops(ah, ah->bhalq, &qi); 1000 if (ret) { 1001 ATH5K_ERR(ah, "%s: unable to update parameters for beacon " 1002 "hardware queue!\n", __func__); 1003 goto err; 1004 } 1005 ret = ath5k_hw_reset_tx_queue(ah, ah->bhalq); /* push to h/w */ 1006 if (ret) 1007 goto err; 1008 1009 /* reconfigure cabq with ready time to 80% of beacon_interval */ 1010 ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi); 1011 if (ret) 1012 goto err; 1013 1014 qi.tqi_ready_time = (ah->bintval * 80) / 100; 1015 ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi); 1016 if (ret) 1017 goto err; 1018 1019 ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB); 1020 err: 1021 return ret; 1022 } 1023 1024 /** 1025 * ath5k_drain_tx_buffs - Empty tx buffers 1026 * 1027 * @ah The &struct ath5k_hw 1028 * 1029 * Empty tx buffers from all queues in preparation 1030 * of a reset or during shutdown. 1031 * 1032 * NB: this assumes output has been stopped and 1033 * we do not need to block ath5k_tx_tasklet 1034 */ 1035 static void 1036 ath5k_drain_tx_buffs(struct ath5k_hw *ah) 1037 { 1038 struct ath5k_txq *txq; 1039 struct ath5k_buf *bf, *bf0; 1040 int i; 1041 1042 for (i = 0; i < ARRAY_SIZE(ah->txqs); i++) { 1043 if (ah->txqs[i].setup) { 1044 txq = &ah->txqs[i]; 1045 spin_lock_bh(&txq->lock); 1046 list_for_each_entry_safe(bf, bf0, &txq->q, list) { 1047 ath5k_debug_printtxbuf(ah, bf); 1048 1049 ath5k_txbuf_free_skb(ah, bf); 1050 1051 spin_lock(&ah->txbuflock); 1052 list_move_tail(&bf->list, &ah->txbuf); 1053 ah->txbuf_len++; 1054 txq->txq_len--; 1055 spin_unlock(&ah->txbuflock); 1056 } 1057 txq->link = NULL; 1058 txq->txq_poll_mark = false; 1059 spin_unlock_bh(&txq->lock); 1060 } 1061 } 1062 } 1063 1064 static void 1065 ath5k_txq_release(struct ath5k_hw *ah) 1066 { 1067 struct ath5k_txq *txq = ah->txqs; 1068 unsigned int i; 1069 1070 for (i = 0; i < ARRAY_SIZE(ah->txqs); i++, txq++) 1071 if (txq->setup) { 1072 ath5k_hw_release_tx_queue(ah, txq->qnum); 1073 txq->setup = false; 1074 } 1075 } 1076 1077 1078 /*************\ 1079 * RX Handling * 1080 \*************/ 1081 1082 /* 1083 * Enable the receive h/w following a reset. 1084 */ 1085 static int 1086 ath5k_rx_start(struct ath5k_hw *ah) 1087 { 1088 struct ath_common *common = ath5k_hw_common(ah); 1089 struct ath5k_buf *bf; 1090 int ret; 1091 1092 common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz); 1093 1094 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n", 1095 common->cachelsz, common->rx_bufsize); 1096 1097 spin_lock_bh(&ah->rxbuflock); 1098 ah->rxlink = NULL; 1099 list_for_each_entry(bf, &ah->rxbuf, list) { 1100 ret = ath5k_rxbuf_setup(ah, bf); 1101 if (ret != 0) { 1102 spin_unlock_bh(&ah->rxbuflock); 1103 goto err; 1104 } 1105 } 1106 bf = list_first_entry(&ah->rxbuf, struct ath5k_buf, list); 1107 ath5k_hw_set_rxdp(ah, bf->daddr); 1108 spin_unlock_bh(&ah->rxbuflock); 1109 1110 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */ 1111 ath5k_update_bssid_mask_and_opmode(ah, NULL); /* set filters, etc. */ 1112 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */ 1113 1114 return 0; 1115 err: 1116 return ret; 1117 } 1118 1119 /* 1120 * Disable the receive logic on PCU (DRU) 1121 * In preparation for a shutdown. 1122 * 1123 * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop 1124 * does. 1125 */ 1126 static void 1127 ath5k_rx_stop(struct ath5k_hw *ah) 1128 { 1129 1130 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */ 1131 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */ 1132 1133 ath5k_debug_printrxbuffs(ah); 1134 } 1135 1136 static unsigned int 1137 ath5k_rx_decrypted(struct ath5k_hw *ah, struct sk_buff *skb, 1138 struct ath5k_rx_status *rs) 1139 { 1140 struct ath_common *common = ath5k_hw_common(ah); 1141 struct ieee80211_hdr *hdr = (void *)skb->data; 1142 unsigned int keyix, hlen; 1143 1144 if (!(rs->rs_status & AR5K_RXERR_DECRYPT) && 1145 rs->rs_keyix != AR5K_RXKEYIX_INVALID) 1146 return RX_FLAG_DECRYPTED; 1147 1148 /* Apparently when a default key is used to decrypt the packet 1149 the hw does not set the index used to decrypt. In such cases 1150 get the index from the packet. */ 1151 hlen = ieee80211_hdrlen(hdr->frame_control); 1152 if (ieee80211_has_protected(hdr->frame_control) && 1153 !(rs->rs_status & AR5K_RXERR_DECRYPT) && 1154 skb->len >= hlen + 4) { 1155 keyix = skb->data[hlen + 3] >> 6; 1156 1157 if (test_bit(keyix, common->keymap)) 1158 return RX_FLAG_DECRYPTED; 1159 } 1160 1161 return 0; 1162 } 1163 1164 1165 static void 1166 ath5k_check_ibss_tsf(struct ath5k_hw *ah, struct sk_buff *skb, 1167 struct ieee80211_rx_status *rxs) 1168 { 1169 struct ath_common *common = ath5k_hw_common(ah); 1170 u64 tsf, bc_tstamp; 1171 u32 hw_tu; 1172 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 1173 1174 if (ieee80211_is_beacon(mgmt->frame_control) && 1175 le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS && 1176 ether_addr_equal(mgmt->bssid, common->curbssid)) { 1177 /* 1178 * Received an IBSS beacon with the same BSSID. Hardware *must* 1179 * have updated the local TSF. We have to work around various 1180 * hardware bugs, though... 1181 */ 1182 tsf = ath5k_hw_get_tsf64(ah); 1183 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp); 1184 hw_tu = TSF_TO_TU(tsf); 1185 1186 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 1187 "beacon %llx mactime %llx (diff %lld) tsf now %llx\n", 1188 (unsigned long long)bc_tstamp, 1189 (unsigned long long)rxs->mactime, 1190 (unsigned long long)(rxs->mactime - bc_tstamp), 1191 (unsigned long long)tsf); 1192 1193 /* 1194 * Sometimes the HW will give us a wrong tstamp in the rx 1195 * status, causing the timestamp extension to go wrong. 1196 * (This seems to happen especially with beacon frames bigger 1197 * than 78 byte (incl. FCS)) 1198 * But we know that the receive timestamp must be later than the 1199 * timestamp of the beacon since HW must have synced to that. 1200 * 1201 * NOTE: here we assume mactime to be after the frame was 1202 * received, not like mac80211 which defines it at the start. 1203 */ 1204 if (bc_tstamp > rxs->mactime) { 1205 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 1206 "fixing mactime from %llx to %llx\n", 1207 (unsigned long long)rxs->mactime, 1208 (unsigned long long)tsf); 1209 rxs->mactime = tsf; 1210 } 1211 1212 /* 1213 * Local TSF might have moved higher than our beacon timers, 1214 * in that case we have to update them to continue sending 1215 * beacons. This also takes care of synchronizing beacon sending 1216 * times with other stations. 1217 */ 1218 if (hw_tu >= ah->nexttbtt) 1219 ath5k_beacon_update_timers(ah, bc_tstamp); 1220 1221 /* Check if the beacon timers are still correct, because a TSF 1222 * update might have created a window between them - for a 1223 * longer description see the comment of this function: */ 1224 if (!ath5k_hw_check_beacon_timers(ah, ah->bintval)) { 1225 ath5k_beacon_update_timers(ah, bc_tstamp); 1226 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 1227 "fixed beacon timers after beacon receive\n"); 1228 } 1229 } 1230 } 1231 1232 static void 1233 ath5k_update_beacon_rssi(struct ath5k_hw *ah, struct sk_buff *skb, int rssi) 1234 { 1235 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; 1236 struct ath_common *common = ath5k_hw_common(ah); 1237 1238 /* only beacons from our BSSID */ 1239 if (!ieee80211_is_beacon(mgmt->frame_control) || 1240 !ether_addr_equal(mgmt->bssid, common->curbssid)) 1241 return; 1242 1243 ewma_add(&ah->ah_beacon_rssi_avg, rssi); 1244 1245 /* in IBSS mode we should keep RSSI statistics per neighbour */ 1246 /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */ 1247 } 1248 1249 /* 1250 * Compute padding position. skb must contain an IEEE 802.11 frame 1251 */ 1252 static int ath5k_common_padpos(struct sk_buff *skb) 1253 { 1254 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1255 __le16 frame_control = hdr->frame_control; 1256 int padpos = 24; 1257 1258 if (ieee80211_has_a4(frame_control)) 1259 padpos += ETH_ALEN; 1260 1261 if (ieee80211_is_data_qos(frame_control)) 1262 padpos += IEEE80211_QOS_CTL_LEN; 1263 1264 return padpos; 1265 } 1266 1267 /* 1268 * This function expects an 802.11 frame and returns the number of 1269 * bytes added, or -1 if we don't have enough header room. 1270 */ 1271 static int ath5k_add_padding(struct sk_buff *skb) 1272 { 1273 int padpos = ath5k_common_padpos(skb); 1274 int padsize = padpos & 3; 1275 1276 if (padsize && skb->len > padpos) { 1277 1278 if (skb_headroom(skb) < padsize) 1279 return -1; 1280 1281 skb_push(skb, padsize); 1282 memmove(skb->data, skb->data + padsize, padpos); 1283 return padsize; 1284 } 1285 1286 return 0; 1287 } 1288 1289 /* 1290 * The MAC header is padded to have 32-bit boundary if the 1291 * packet payload is non-zero. The general calculation for 1292 * padsize would take into account odd header lengths: 1293 * padsize = 4 - (hdrlen & 3); however, since only 1294 * even-length headers are used, padding can only be 0 or 2 1295 * bytes and we can optimize this a bit. We must not try to 1296 * remove padding from short control frames that do not have a 1297 * payload. 1298 * 1299 * This function expects an 802.11 frame and returns the number of 1300 * bytes removed. 1301 */ 1302 static int ath5k_remove_padding(struct sk_buff *skb) 1303 { 1304 int padpos = ath5k_common_padpos(skb); 1305 int padsize = padpos & 3; 1306 1307 if (padsize && skb->len >= padpos + padsize) { 1308 memmove(skb->data + padsize, skb->data, padpos); 1309 skb_pull(skb, padsize); 1310 return padsize; 1311 } 1312 1313 return 0; 1314 } 1315 1316 static void 1317 ath5k_receive_frame(struct ath5k_hw *ah, struct sk_buff *skb, 1318 struct ath5k_rx_status *rs) 1319 { 1320 struct ieee80211_rx_status *rxs; 1321 1322 ath5k_remove_padding(skb); 1323 1324 rxs = IEEE80211_SKB_RXCB(skb); 1325 1326 rxs->flag = 0; 1327 if (unlikely(rs->rs_status & AR5K_RXERR_MIC)) 1328 rxs->flag |= RX_FLAG_MMIC_ERROR; 1329 1330 /* 1331 * always extend the mac timestamp, since this information is 1332 * also needed for proper IBSS merging. 1333 * 1334 * XXX: it might be too late to do it here, since rs_tstamp is 1335 * 15bit only. that means TSF extension has to be done within 1336 * 32768usec (about 32ms). it might be necessary to move this to 1337 * the interrupt handler, like it is done in madwifi. 1338 * 1339 * Unfortunately we don't know when the hardware takes the rx 1340 * timestamp (beginning of phy frame, data frame, end of rx?). 1341 * The only thing we know is that it is hardware specific... 1342 * On AR5213 it seems the rx timestamp is at the end of the 1343 * frame, but I'm not sure. 1344 * 1345 * NOTE: mac80211 defines mactime at the beginning of the first 1346 * data symbol. Since we don't have any time references it's 1347 * impossible to comply to that. This affects IBSS merge only 1348 * right now, so it's not too bad... 1349 */ 1350 rxs->mactime = ath5k_extend_tsf(ah, rs->rs_tstamp); 1351 rxs->flag |= RX_FLAG_MACTIME_MPDU; 1352 1353 rxs->freq = ah->curchan->center_freq; 1354 rxs->band = ah->curchan->band; 1355 1356 rxs->signal = ah->ah_noise_floor + rs->rs_rssi; 1357 1358 rxs->antenna = rs->rs_antenna; 1359 1360 if (rs->rs_antenna > 0 && rs->rs_antenna < 5) 1361 ah->stats.antenna_rx[rs->rs_antenna]++; 1362 else 1363 ah->stats.antenna_rx[0]++; /* invalid */ 1364 1365 rxs->rate_idx = ath5k_hw_to_driver_rix(ah, rs->rs_rate); 1366 rxs->flag |= ath5k_rx_decrypted(ah, skb, rs); 1367 1368 if (rxs->rate_idx >= 0 && rs->rs_rate == 1369 ah->sbands[ah->curchan->band].bitrates[rxs->rate_idx].hw_value_short) 1370 rxs->flag |= RX_FLAG_SHORTPRE; 1371 1372 trace_ath5k_rx(ah, skb); 1373 1374 ath5k_update_beacon_rssi(ah, skb, rs->rs_rssi); 1375 1376 /* check beacons in IBSS mode */ 1377 if (ah->opmode == NL80211_IFTYPE_ADHOC) 1378 ath5k_check_ibss_tsf(ah, skb, rxs); 1379 1380 ieee80211_rx(ah->hw, skb); 1381 } 1382 1383 /** ath5k_frame_receive_ok() - Do we want to receive this frame or not? 1384 * 1385 * Check if we want to further process this frame or not. Also update 1386 * statistics. Return true if we want this frame, false if not. 1387 */ 1388 static bool 1389 ath5k_receive_frame_ok(struct ath5k_hw *ah, struct ath5k_rx_status *rs) 1390 { 1391 ah->stats.rx_all_count++; 1392 ah->stats.rx_bytes_count += rs->rs_datalen; 1393 1394 if (unlikely(rs->rs_status)) { 1395 if (rs->rs_status & AR5K_RXERR_CRC) 1396 ah->stats.rxerr_crc++; 1397 if (rs->rs_status & AR5K_RXERR_FIFO) 1398 ah->stats.rxerr_fifo++; 1399 if (rs->rs_status & AR5K_RXERR_PHY) { 1400 ah->stats.rxerr_phy++; 1401 if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32) 1402 ah->stats.rxerr_phy_code[rs->rs_phyerr]++; 1403 return false; 1404 } 1405 if (rs->rs_status & AR5K_RXERR_DECRYPT) { 1406 /* 1407 * Decrypt error. If the error occurred 1408 * because there was no hardware key, then 1409 * let the frame through so the upper layers 1410 * can process it. This is necessary for 5210 1411 * parts which have no way to setup a ``clear'' 1412 * key cache entry. 1413 * 1414 * XXX do key cache faulting 1415 */ 1416 ah->stats.rxerr_decrypt++; 1417 if (rs->rs_keyix == AR5K_RXKEYIX_INVALID && 1418 !(rs->rs_status & AR5K_RXERR_CRC)) 1419 return true; 1420 } 1421 if (rs->rs_status & AR5K_RXERR_MIC) { 1422 ah->stats.rxerr_mic++; 1423 return true; 1424 } 1425 1426 /* reject any frames with non-crypto errors */ 1427 if (rs->rs_status & ~(AR5K_RXERR_DECRYPT)) 1428 return false; 1429 } 1430 1431 if (unlikely(rs->rs_more)) { 1432 ah->stats.rxerr_jumbo++; 1433 return false; 1434 } 1435 return true; 1436 } 1437 1438 static void 1439 ath5k_set_current_imask(struct ath5k_hw *ah) 1440 { 1441 enum ath5k_int imask; 1442 unsigned long flags; 1443 1444 spin_lock_irqsave(&ah->irqlock, flags); 1445 imask = ah->imask; 1446 if (ah->rx_pending) 1447 imask &= ~AR5K_INT_RX_ALL; 1448 if (ah->tx_pending) 1449 imask &= ~AR5K_INT_TX_ALL; 1450 ath5k_hw_set_imr(ah, imask); 1451 spin_unlock_irqrestore(&ah->irqlock, flags); 1452 } 1453 1454 static void 1455 ath5k_tasklet_rx(unsigned long data) 1456 { 1457 struct ath5k_rx_status rs = {}; 1458 struct sk_buff *skb, *next_skb; 1459 dma_addr_t next_skb_addr; 1460 struct ath5k_hw *ah = (void *)data; 1461 struct ath_common *common = ath5k_hw_common(ah); 1462 struct ath5k_buf *bf; 1463 struct ath5k_desc *ds; 1464 int ret; 1465 1466 spin_lock(&ah->rxbuflock); 1467 if (list_empty(&ah->rxbuf)) { 1468 ATH5K_WARN(ah, "empty rx buf pool\n"); 1469 goto unlock; 1470 } 1471 do { 1472 bf = list_first_entry(&ah->rxbuf, struct ath5k_buf, list); 1473 BUG_ON(bf->skb == NULL); 1474 skb = bf->skb; 1475 ds = bf->desc; 1476 1477 /* bail if HW is still using self-linked descriptor */ 1478 if (ath5k_hw_get_rxdp(ah) == bf->daddr) 1479 break; 1480 1481 ret = ah->ah_proc_rx_desc(ah, ds, &rs); 1482 if (unlikely(ret == -EINPROGRESS)) 1483 break; 1484 else if (unlikely(ret)) { 1485 ATH5K_ERR(ah, "error in processing rx descriptor\n"); 1486 ah->stats.rxerr_proc++; 1487 break; 1488 } 1489 1490 if (ath5k_receive_frame_ok(ah, &rs)) { 1491 next_skb = ath5k_rx_skb_alloc(ah, &next_skb_addr); 1492 1493 /* 1494 * If we can't replace bf->skb with a new skb under 1495 * memory pressure, just skip this packet 1496 */ 1497 if (!next_skb) 1498 goto next; 1499 1500 dma_unmap_single(ah->dev, bf->skbaddr, 1501 common->rx_bufsize, 1502 DMA_FROM_DEVICE); 1503 1504 skb_put(skb, rs.rs_datalen); 1505 1506 ath5k_receive_frame(ah, skb, &rs); 1507 1508 bf->skb = next_skb; 1509 bf->skbaddr = next_skb_addr; 1510 } 1511 next: 1512 list_move_tail(&bf->list, &ah->rxbuf); 1513 } while (ath5k_rxbuf_setup(ah, bf) == 0); 1514 unlock: 1515 spin_unlock(&ah->rxbuflock); 1516 ah->rx_pending = false; 1517 ath5k_set_current_imask(ah); 1518 } 1519 1520 1521 /*************\ 1522 * TX Handling * 1523 \*************/ 1524 1525 void 1526 ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb, 1527 struct ath5k_txq *txq) 1528 { 1529 struct ath5k_hw *ah = hw->priv; 1530 struct ath5k_buf *bf; 1531 unsigned long flags; 1532 int padsize; 1533 1534 trace_ath5k_tx(ah, skb, txq); 1535 1536 /* 1537 * The hardware expects the header padded to 4 byte boundaries. 1538 * If this is not the case, we add the padding after the header. 1539 */ 1540 padsize = ath5k_add_padding(skb); 1541 if (padsize < 0) { 1542 ATH5K_ERR(ah, "tx hdrlen not %%4: not enough" 1543 " headroom to pad"); 1544 goto drop_packet; 1545 } 1546 1547 if (txq->txq_len >= txq->txq_max && 1548 txq->qnum <= AR5K_TX_QUEUE_ID_DATA_MAX) 1549 ieee80211_stop_queue(hw, txq->qnum); 1550 1551 spin_lock_irqsave(&ah->txbuflock, flags); 1552 if (list_empty(&ah->txbuf)) { 1553 ATH5K_ERR(ah, "no further txbuf available, dropping packet\n"); 1554 spin_unlock_irqrestore(&ah->txbuflock, flags); 1555 ieee80211_stop_queues(hw); 1556 goto drop_packet; 1557 } 1558 bf = list_first_entry(&ah->txbuf, struct ath5k_buf, list); 1559 list_del(&bf->list); 1560 ah->txbuf_len--; 1561 if (list_empty(&ah->txbuf)) 1562 ieee80211_stop_queues(hw); 1563 spin_unlock_irqrestore(&ah->txbuflock, flags); 1564 1565 bf->skb = skb; 1566 1567 if (ath5k_txbuf_setup(ah, bf, txq, padsize)) { 1568 bf->skb = NULL; 1569 spin_lock_irqsave(&ah->txbuflock, flags); 1570 list_add_tail(&bf->list, &ah->txbuf); 1571 ah->txbuf_len++; 1572 spin_unlock_irqrestore(&ah->txbuflock, flags); 1573 goto drop_packet; 1574 } 1575 return; 1576 1577 drop_packet: 1578 dev_kfree_skb_any(skb); 1579 } 1580 1581 static void 1582 ath5k_tx_frame_completed(struct ath5k_hw *ah, struct sk_buff *skb, 1583 struct ath5k_txq *txq, struct ath5k_tx_status *ts) 1584 { 1585 struct ieee80211_tx_info *info; 1586 u8 tries[3]; 1587 int i; 1588 1589 ah->stats.tx_all_count++; 1590 ah->stats.tx_bytes_count += skb->len; 1591 info = IEEE80211_SKB_CB(skb); 1592 1593 tries[0] = info->status.rates[0].count; 1594 tries[1] = info->status.rates[1].count; 1595 tries[2] = info->status.rates[2].count; 1596 1597 ieee80211_tx_info_clear_status(info); 1598 1599 for (i = 0; i < ts->ts_final_idx; i++) { 1600 struct ieee80211_tx_rate *r = 1601 &info->status.rates[i]; 1602 1603 r->count = tries[i]; 1604 } 1605 1606 info->status.rates[ts->ts_final_idx].count = ts->ts_final_retry; 1607 info->status.rates[ts->ts_final_idx + 1].idx = -1; 1608 1609 if (unlikely(ts->ts_status)) { 1610 ah->stats.ack_fail++; 1611 if (ts->ts_status & AR5K_TXERR_FILT) { 1612 info->flags |= IEEE80211_TX_STAT_TX_FILTERED; 1613 ah->stats.txerr_filt++; 1614 } 1615 if (ts->ts_status & AR5K_TXERR_XRETRY) 1616 ah->stats.txerr_retry++; 1617 if (ts->ts_status & AR5K_TXERR_FIFO) 1618 ah->stats.txerr_fifo++; 1619 } else { 1620 info->flags |= IEEE80211_TX_STAT_ACK; 1621 info->status.ack_signal = ts->ts_rssi; 1622 1623 /* count the successful attempt as well */ 1624 info->status.rates[ts->ts_final_idx].count++; 1625 } 1626 1627 /* 1628 * Remove MAC header padding before giving the frame 1629 * back to mac80211. 1630 */ 1631 ath5k_remove_padding(skb); 1632 1633 if (ts->ts_antenna > 0 && ts->ts_antenna < 5) 1634 ah->stats.antenna_tx[ts->ts_antenna]++; 1635 else 1636 ah->stats.antenna_tx[0]++; /* invalid */ 1637 1638 trace_ath5k_tx_complete(ah, skb, txq, ts); 1639 ieee80211_tx_status(ah->hw, skb); 1640 } 1641 1642 static void 1643 ath5k_tx_processq(struct ath5k_hw *ah, struct ath5k_txq *txq) 1644 { 1645 struct ath5k_tx_status ts = {}; 1646 struct ath5k_buf *bf, *bf0; 1647 struct ath5k_desc *ds; 1648 struct sk_buff *skb; 1649 int ret; 1650 1651 spin_lock(&txq->lock); 1652 list_for_each_entry_safe(bf, bf0, &txq->q, list) { 1653 1654 txq->txq_poll_mark = false; 1655 1656 /* skb might already have been processed last time. */ 1657 if (bf->skb != NULL) { 1658 ds = bf->desc; 1659 1660 ret = ah->ah_proc_tx_desc(ah, ds, &ts); 1661 if (unlikely(ret == -EINPROGRESS)) 1662 break; 1663 else if (unlikely(ret)) { 1664 ATH5K_ERR(ah, 1665 "error %d while processing " 1666 "queue %u\n", ret, txq->qnum); 1667 break; 1668 } 1669 1670 skb = bf->skb; 1671 bf->skb = NULL; 1672 1673 dma_unmap_single(ah->dev, bf->skbaddr, skb->len, 1674 DMA_TO_DEVICE); 1675 ath5k_tx_frame_completed(ah, skb, txq, &ts); 1676 } 1677 1678 /* 1679 * It's possible that the hardware can say the buffer is 1680 * completed when it hasn't yet loaded the ds_link from 1681 * host memory and moved on. 1682 * Always keep the last descriptor to avoid HW races... 1683 */ 1684 if (ath5k_hw_get_txdp(ah, txq->qnum) != bf->daddr) { 1685 spin_lock(&ah->txbuflock); 1686 list_move_tail(&bf->list, &ah->txbuf); 1687 ah->txbuf_len++; 1688 txq->txq_len--; 1689 spin_unlock(&ah->txbuflock); 1690 } 1691 } 1692 spin_unlock(&txq->lock); 1693 if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4) 1694 ieee80211_wake_queue(ah->hw, txq->qnum); 1695 } 1696 1697 static void 1698 ath5k_tasklet_tx(unsigned long data) 1699 { 1700 int i; 1701 struct ath5k_hw *ah = (void *)data; 1702 1703 for (i = 0; i < AR5K_NUM_TX_QUEUES; i++) 1704 if (ah->txqs[i].setup && (ah->ah_txq_isr_txok_all & BIT(i))) 1705 ath5k_tx_processq(ah, &ah->txqs[i]); 1706 1707 ah->tx_pending = false; 1708 ath5k_set_current_imask(ah); 1709 } 1710 1711 1712 /*****************\ 1713 * Beacon handling * 1714 \*****************/ 1715 1716 /* 1717 * Setup the beacon frame for transmit. 1718 */ 1719 static int 1720 ath5k_beacon_setup(struct ath5k_hw *ah, struct ath5k_buf *bf) 1721 { 1722 struct sk_buff *skb = bf->skb; 1723 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1724 struct ath5k_desc *ds; 1725 int ret = 0; 1726 u8 antenna; 1727 u32 flags; 1728 const int padsize = 0; 1729 1730 bf->skbaddr = dma_map_single(ah->dev, skb->data, skb->len, 1731 DMA_TO_DEVICE); 1732 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] " 1733 "skbaddr %llx\n", skb, skb->data, skb->len, 1734 (unsigned long long)bf->skbaddr); 1735 1736 if (dma_mapping_error(ah->dev, bf->skbaddr)) { 1737 ATH5K_ERR(ah, "beacon DMA mapping failed\n"); 1738 dev_kfree_skb_any(skb); 1739 bf->skb = NULL; 1740 return -EIO; 1741 } 1742 1743 ds = bf->desc; 1744 antenna = ah->ah_tx_ant; 1745 1746 flags = AR5K_TXDESC_NOACK; 1747 if (ah->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) { 1748 ds->ds_link = bf->daddr; /* self-linked */ 1749 flags |= AR5K_TXDESC_VEOL; 1750 } else 1751 ds->ds_link = 0; 1752 1753 /* 1754 * If we use multiple antennas on AP and use 1755 * the Sectored AP scenario, switch antenna every 1756 * 4 beacons to make sure everybody hears our AP. 1757 * When a client tries to associate, hw will keep 1758 * track of the tx antenna to be used for this client 1759 * automatically, based on ACKed packets. 1760 * 1761 * Note: AP still listens and transmits RTS on the 1762 * default antenna which is supposed to be an omni. 1763 * 1764 * Note2: On sectored scenarios it's possible to have 1765 * multiple antennas (1 omni -- the default -- and 14 1766 * sectors), so if we choose to actually support this 1767 * mode, we need to allow the user to set how many antennas 1768 * we have and tweak the code below to send beacons 1769 * on all of them. 1770 */ 1771 if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP) 1772 antenna = ah->bsent & 4 ? 2 : 1; 1773 1774 1775 /* FIXME: If we are in g mode and rate is a CCK rate 1776 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta 1777 * from tx power (value is in dB units already) */ 1778 ds->ds_data = bf->skbaddr; 1779 ret = ah->ah_setup_tx_desc(ah, ds, skb->len, 1780 ieee80211_get_hdrlen_from_skb(skb), padsize, 1781 AR5K_PKT_TYPE_BEACON, (ah->power_level * 2), 1782 ieee80211_get_tx_rate(ah->hw, info)->hw_value, 1783 1, AR5K_TXKEYIX_INVALID, 1784 antenna, flags, 0, 0); 1785 if (ret) 1786 goto err_unmap; 1787 1788 return 0; 1789 err_unmap: 1790 dma_unmap_single(ah->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE); 1791 return ret; 1792 } 1793 1794 /* 1795 * Updates the beacon that is sent by ath5k_beacon_send. For adhoc, 1796 * this is called only once at config_bss time, for AP we do it every 1797 * SWBA interrupt so that the TIM will reflect buffered frames. 1798 * 1799 * Called with the beacon lock. 1800 */ 1801 int 1802 ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 1803 { 1804 int ret; 1805 struct ath5k_hw *ah = hw->priv; 1806 struct ath5k_vif *avf = (void *)vif->drv_priv; 1807 struct sk_buff *skb; 1808 1809 if (WARN_ON(!vif)) { 1810 ret = -EINVAL; 1811 goto out; 1812 } 1813 1814 skb = ieee80211_beacon_get(hw, vif); 1815 1816 if (!skb) { 1817 ret = -ENOMEM; 1818 goto out; 1819 } 1820 1821 ath5k_txbuf_free_skb(ah, avf->bbuf); 1822 avf->bbuf->skb = skb; 1823 ret = ath5k_beacon_setup(ah, avf->bbuf); 1824 out: 1825 return ret; 1826 } 1827 1828 /* 1829 * Transmit a beacon frame at SWBA. Dynamic updates to the 1830 * frame contents are done as needed and the slot time is 1831 * also adjusted based on current state. 1832 * 1833 * This is called from software irq context (beacontq tasklets) 1834 * or user context from ath5k_beacon_config. 1835 */ 1836 static void 1837 ath5k_beacon_send(struct ath5k_hw *ah) 1838 { 1839 struct ieee80211_vif *vif; 1840 struct ath5k_vif *avf; 1841 struct ath5k_buf *bf; 1842 struct sk_buff *skb; 1843 int err; 1844 1845 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, "in beacon_send\n"); 1846 1847 /* 1848 * Check if the previous beacon has gone out. If 1849 * not, don't don't try to post another: skip this 1850 * period and wait for the next. Missed beacons 1851 * indicate a problem and should not occur. If we 1852 * miss too many consecutive beacons reset the device. 1853 */ 1854 if (unlikely(ath5k_hw_num_tx_pending(ah, ah->bhalq) != 0)) { 1855 ah->bmisscount++; 1856 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, 1857 "missed %u consecutive beacons\n", ah->bmisscount); 1858 if (ah->bmisscount > 10) { /* NB: 10 is a guess */ 1859 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, 1860 "stuck beacon time (%u missed)\n", 1861 ah->bmisscount); 1862 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 1863 "stuck beacon, resetting\n"); 1864 ieee80211_queue_work(ah->hw, &ah->reset_work); 1865 } 1866 return; 1867 } 1868 if (unlikely(ah->bmisscount != 0)) { 1869 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, 1870 "resume beacon xmit after %u misses\n", 1871 ah->bmisscount); 1872 ah->bmisscount = 0; 1873 } 1874 1875 if ((ah->opmode == NL80211_IFTYPE_AP && ah->num_ap_vifs + 1876 ah->num_mesh_vifs > 1) || 1877 ah->opmode == NL80211_IFTYPE_MESH_POINT) { 1878 u64 tsf = ath5k_hw_get_tsf64(ah); 1879 u32 tsftu = TSF_TO_TU(tsf); 1880 int slot = ((tsftu % ah->bintval) * ATH_BCBUF) / ah->bintval; 1881 vif = ah->bslot[(slot + 1) % ATH_BCBUF]; 1882 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, 1883 "tsf %llx tsftu %x intval %u slot %u vif %p\n", 1884 (unsigned long long)tsf, tsftu, ah->bintval, slot, vif); 1885 } else /* only one interface */ 1886 vif = ah->bslot[0]; 1887 1888 if (!vif) 1889 return; 1890 1891 avf = (void *)vif->drv_priv; 1892 bf = avf->bbuf; 1893 1894 /* 1895 * Stop any current dma and put the new frame on the queue. 1896 * This should never fail since we check above that no frames 1897 * are still pending on the queue. 1898 */ 1899 if (unlikely(ath5k_hw_stop_beacon_queue(ah, ah->bhalq))) { 1900 ATH5K_WARN(ah, "beacon queue %u didn't start/stop ?\n", ah->bhalq); 1901 /* NB: hw still stops DMA, so proceed */ 1902 } 1903 1904 /* refresh the beacon for AP or MESH mode */ 1905 if (ah->opmode == NL80211_IFTYPE_AP || 1906 ah->opmode == NL80211_IFTYPE_MESH_POINT) { 1907 err = ath5k_beacon_update(ah->hw, vif); 1908 if (err) 1909 return; 1910 } 1911 1912 if (unlikely(bf->skb == NULL || ah->opmode == NL80211_IFTYPE_STATION || 1913 ah->opmode == NL80211_IFTYPE_MONITOR)) { 1914 ATH5K_WARN(ah, "bf=%p bf_skb=%p\n", bf, bf->skb); 1915 return; 1916 } 1917 1918 trace_ath5k_tx(ah, bf->skb, &ah->txqs[ah->bhalq]); 1919 1920 ath5k_hw_set_txdp(ah, ah->bhalq, bf->daddr); 1921 ath5k_hw_start_tx_dma(ah, ah->bhalq); 1922 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n", 1923 ah->bhalq, (unsigned long long)bf->daddr, bf->desc); 1924 1925 skb = ieee80211_get_buffered_bc(ah->hw, vif); 1926 while (skb) { 1927 ath5k_tx_queue(ah->hw, skb, ah->cabq); 1928 1929 if (ah->cabq->txq_len >= ah->cabq->txq_max) 1930 break; 1931 1932 skb = ieee80211_get_buffered_bc(ah->hw, vif); 1933 } 1934 1935 ah->bsent++; 1936 } 1937 1938 /** 1939 * ath5k_beacon_update_timers - update beacon timers 1940 * 1941 * @ah: struct ath5k_hw pointer we are operating on 1942 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a 1943 * beacon timer update based on the current HW TSF. 1944 * 1945 * Calculate the next target beacon transmit time (TBTT) based on the timestamp 1946 * of a received beacon or the current local hardware TSF and write it to the 1947 * beacon timer registers. 1948 * 1949 * This is called in a variety of situations, e.g. when a beacon is received, 1950 * when a TSF update has been detected, but also when an new IBSS is created or 1951 * when we otherwise know we have to update the timers, but we keep it in this 1952 * function to have it all together in one place. 1953 */ 1954 void 1955 ath5k_beacon_update_timers(struct ath5k_hw *ah, u64 bc_tsf) 1956 { 1957 u32 nexttbtt, intval, hw_tu, bc_tu; 1958 u64 hw_tsf; 1959 1960 intval = ah->bintval & AR5K_BEACON_PERIOD; 1961 if (ah->opmode == NL80211_IFTYPE_AP && ah->num_ap_vifs 1962 + ah->num_mesh_vifs > 1) { 1963 intval /= ATH_BCBUF; /* staggered multi-bss beacons */ 1964 if (intval < 15) 1965 ATH5K_WARN(ah, "intval %u is too low, min 15\n", 1966 intval); 1967 } 1968 if (WARN_ON(!intval)) 1969 return; 1970 1971 /* beacon TSF converted to TU */ 1972 bc_tu = TSF_TO_TU(bc_tsf); 1973 1974 /* current TSF converted to TU */ 1975 hw_tsf = ath5k_hw_get_tsf64(ah); 1976 hw_tu = TSF_TO_TU(hw_tsf); 1977 1978 #define FUDGE (AR5K_TUNE_SW_BEACON_RESP + 3) 1979 /* We use FUDGE to make sure the next TBTT is ahead of the current TU. 1980 * Since we later subtract AR5K_TUNE_SW_BEACON_RESP (10) in the timer 1981 * configuration we need to make sure it is bigger than that. */ 1982 1983 if (bc_tsf == -1) { 1984 /* 1985 * no beacons received, called internally. 1986 * just need to refresh timers based on HW TSF. 1987 */ 1988 nexttbtt = roundup(hw_tu + FUDGE, intval); 1989 } else if (bc_tsf == 0) { 1990 /* 1991 * no beacon received, probably called by ath5k_reset_tsf(). 1992 * reset TSF to start with 0. 1993 */ 1994 nexttbtt = intval; 1995 intval |= AR5K_BEACON_RESET_TSF; 1996 } else if (bc_tsf > hw_tsf) { 1997 /* 1998 * beacon received, SW merge happened but HW TSF not yet updated. 1999 * not possible to reconfigure timers yet, but next time we 2000 * receive a beacon with the same BSSID, the hardware will 2001 * automatically update the TSF and then we need to reconfigure 2002 * the timers. 2003 */ 2004 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 2005 "need to wait for HW TSF sync\n"); 2006 return; 2007 } else { 2008 /* 2009 * most important case for beacon synchronization between STA. 2010 * 2011 * beacon received and HW TSF has been already updated by HW. 2012 * update next TBTT based on the TSF of the beacon, but make 2013 * sure it is ahead of our local TSF timer. 2014 */ 2015 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval); 2016 } 2017 #undef FUDGE 2018 2019 ah->nexttbtt = nexttbtt; 2020 2021 intval |= AR5K_BEACON_ENA; 2022 ath5k_hw_init_beacon_timers(ah, nexttbtt, intval); 2023 2024 /* 2025 * debugging output last in order to preserve the time critical aspect 2026 * of this function 2027 */ 2028 if (bc_tsf == -1) 2029 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 2030 "reconfigured timers based on HW TSF\n"); 2031 else if (bc_tsf == 0) 2032 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 2033 "reset HW TSF and timers\n"); 2034 else 2035 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 2036 "updated timers based on beacon TSF\n"); 2037 2038 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, 2039 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n", 2040 (unsigned long long) bc_tsf, 2041 (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt); 2042 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_BEACON, "intval %u %s %s\n", 2043 intval & AR5K_BEACON_PERIOD, 2044 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "", 2045 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : ""); 2046 } 2047 2048 /** 2049 * ath5k_beacon_config - Configure the beacon queues and interrupts 2050 * 2051 * @ah: struct ath5k_hw pointer we are operating on 2052 * 2053 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA 2054 * interrupts to detect TSF updates only. 2055 */ 2056 void 2057 ath5k_beacon_config(struct ath5k_hw *ah) 2058 { 2059 spin_lock_bh(&ah->block); 2060 ah->bmisscount = 0; 2061 ah->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA); 2062 2063 if (ah->enable_beacon) { 2064 /* 2065 * In IBSS mode we use a self-linked tx descriptor and let the 2066 * hardware send the beacons automatically. We have to load it 2067 * only once here. 2068 * We use the SWBA interrupt only to keep track of the beacon 2069 * timers in order to detect automatic TSF updates. 2070 */ 2071 ath5k_beaconq_config(ah); 2072 2073 ah->imask |= AR5K_INT_SWBA; 2074 2075 if (ah->opmode == NL80211_IFTYPE_ADHOC) { 2076 if (ath5k_hw_hasveol(ah)) 2077 ath5k_beacon_send(ah); 2078 } else 2079 ath5k_beacon_update_timers(ah, -1); 2080 } else { 2081 ath5k_hw_stop_beacon_queue(ah, ah->bhalq); 2082 } 2083 2084 ath5k_hw_set_imr(ah, ah->imask); 2085 mmiowb(); 2086 spin_unlock_bh(&ah->block); 2087 } 2088 2089 static void ath5k_tasklet_beacon(unsigned long data) 2090 { 2091 struct ath5k_hw *ah = (struct ath5k_hw *) data; 2092 2093 /* 2094 * Software beacon alert--time to send a beacon. 2095 * 2096 * In IBSS mode we use this interrupt just to 2097 * keep track of the next TBTT (target beacon 2098 * transmission time) in order to detect whether 2099 * automatic TSF updates happened. 2100 */ 2101 if (ah->opmode == NL80211_IFTYPE_ADHOC) { 2102 /* XXX: only if VEOL supported */ 2103 u64 tsf = ath5k_hw_get_tsf64(ah); 2104 ah->nexttbtt += ah->bintval; 2105 ATH5K_DBG(ah, ATH5K_DEBUG_BEACON, 2106 "SWBA nexttbtt: %x hw_tu: %x " 2107 "TSF: %llx\n", 2108 ah->nexttbtt, 2109 TSF_TO_TU(tsf), 2110 (unsigned long long) tsf); 2111 } else { 2112 spin_lock(&ah->block); 2113 ath5k_beacon_send(ah); 2114 spin_unlock(&ah->block); 2115 } 2116 } 2117 2118 2119 /********************\ 2120 * Interrupt handling * 2121 \********************/ 2122 2123 static void 2124 ath5k_intr_calibration_poll(struct ath5k_hw *ah) 2125 { 2126 if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) && 2127 !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL) && 2128 !(ah->ah_cal_mask & AR5K_CALIBRATION_SHORT)) { 2129 2130 /* Run ANI only when calibration is not active */ 2131 2132 ah->ah_cal_next_ani = jiffies + 2133 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI); 2134 tasklet_schedule(&ah->ani_tasklet); 2135 2136 } else if (time_is_before_eq_jiffies(ah->ah_cal_next_short) && 2137 !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL) && 2138 !(ah->ah_cal_mask & AR5K_CALIBRATION_SHORT)) { 2139 2140 /* Run calibration only when another calibration 2141 * is not running. 2142 * 2143 * Note: This is for both full/short calibration, 2144 * if it's time for a full one, ath5k_calibrate_work will deal 2145 * with it. */ 2146 2147 ah->ah_cal_next_short = jiffies + 2148 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_SHORT); 2149 ieee80211_queue_work(ah->hw, &ah->calib_work); 2150 } 2151 /* we could use SWI to generate enough interrupts to meet our 2152 * calibration interval requirements, if necessary: 2153 * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */ 2154 } 2155 2156 static void 2157 ath5k_schedule_rx(struct ath5k_hw *ah) 2158 { 2159 ah->rx_pending = true; 2160 tasklet_schedule(&ah->rxtq); 2161 } 2162 2163 static void 2164 ath5k_schedule_tx(struct ath5k_hw *ah) 2165 { 2166 ah->tx_pending = true; 2167 tasklet_schedule(&ah->txtq); 2168 } 2169 2170 static irqreturn_t 2171 ath5k_intr(int irq, void *dev_id) 2172 { 2173 struct ath5k_hw *ah = dev_id; 2174 enum ath5k_int status; 2175 unsigned int counter = 1000; 2176 2177 2178 /* 2179 * If hw is not ready (or detached) and we get an 2180 * interrupt, or if we have no interrupts pending 2181 * (that means it's not for us) skip it. 2182 * 2183 * NOTE: Group 0/1 PCI interface registers are not 2184 * supported on WiSOCs, so we can't check for pending 2185 * interrupts (ISR belongs to another register group 2186 * so we are ok). 2187 */ 2188 if (unlikely(test_bit(ATH_STAT_INVALID, ah->status) || 2189 ((ath5k_get_bus_type(ah) != ATH_AHB) && 2190 !ath5k_hw_is_intr_pending(ah)))) 2191 return IRQ_NONE; 2192 2193 /** Main loop **/ 2194 do { 2195 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */ 2196 2197 ATH5K_DBG(ah, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n", 2198 status, ah->imask); 2199 2200 /* 2201 * Fatal hw error -> Log and reset 2202 * 2203 * Fatal errors are unrecoverable so we have to 2204 * reset the card. These errors include bus and 2205 * dma errors. 2206 */ 2207 if (unlikely(status & AR5K_INT_FATAL)) { 2208 2209 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 2210 "fatal int, resetting\n"); 2211 ieee80211_queue_work(ah->hw, &ah->reset_work); 2212 2213 /* 2214 * RX Overrun -> Count and reset if needed 2215 * 2216 * Receive buffers are full. Either the bus is busy or 2217 * the CPU is not fast enough to process all received 2218 * frames. 2219 */ 2220 } else if (unlikely(status & AR5K_INT_RXORN)) { 2221 2222 /* 2223 * Older chipsets need a reset to come out of this 2224 * condition, but we treat it as RX for newer chips. 2225 * We don't know exactly which versions need a reset 2226 * this guess is copied from the HAL. 2227 */ 2228 ah->stats.rxorn_intr++; 2229 2230 if (ah->ah_mac_srev < AR5K_SREV_AR5212) { 2231 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 2232 "rx overrun, resetting\n"); 2233 ieee80211_queue_work(ah->hw, &ah->reset_work); 2234 } else 2235 ath5k_schedule_rx(ah); 2236 2237 } else { 2238 2239 /* Software Beacon Alert -> Schedule beacon tasklet */ 2240 if (status & AR5K_INT_SWBA) 2241 tasklet_hi_schedule(&ah->beacontq); 2242 2243 /* 2244 * No more RX descriptors -> Just count 2245 * 2246 * NB: the hardware should re-read the link when 2247 * RXE bit is written, but it doesn't work at 2248 * least on older hardware revs. 2249 */ 2250 if (status & AR5K_INT_RXEOL) 2251 ah->stats.rxeol_intr++; 2252 2253 2254 /* TX Underrun -> Bump tx trigger level */ 2255 if (status & AR5K_INT_TXURN) 2256 ath5k_hw_update_tx_triglevel(ah, true); 2257 2258 /* RX -> Schedule rx tasklet */ 2259 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR)) 2260 ath5k_schedule_rx(ah); 2261 2262 /* TX -> Schedule tx tasklet */ 2263 if (status & (AR5K_INT_TXOK 2264 | AR5K_INT_TXDESC 2265 | AR5K_INT_TXERR 2266 | AR5K_INT_TXEOL)) 2267 ath5k_schedule_tx(ah); 2268 2269 /* Missed beacon -> TODO 2270 if (status & AR5K_INT_BMISS) 2271 */ 2272 2273 /* MIB event -> Update counters and notify ANI */ 2274 if (status & AR5K_INT_MIB) { 2275 ah->stats.mib_intr++; 2276 ath5k_hw_update_mib_counters(ah); 2277 ath5k_ani_mib_intr(ah); 2278 } 2279 2280 /* GPIO -> Notify RFKill layer */ 2281 if (status & AR5K_INT_GPIO) 2282 tasklet_schedule(&ah->rf_kill.toggleq); 2283 2284 } 2285 2286 if (ath5k_get_bus_type(ah) == ATH_AHB) 2287 break; 2288 2289 } while (ath5k_hw_is_intr_pending(ah) && --counter > 0); 2290 2291 /* 2292 * Until we handle rx/tx interrupts mask them on IMR 2293 * 2294 * NOTE: ah->(rx/tx)_pending are set when scheduling the tasklets 2295 * and unset after we 've handled the interrupts. 2296 */ 2297 if (ah->rx_pending || ah->tx_pending) 2298 ath5k_set_current_imask(ah); 2299 2300 if (unlikely(!counter)) 2301 ATH5K_WARN(ah, "too many interrupts, giving up for now\n"); 2302 2303 /* Fire up calibration poll */ 2304 ath5k_intr_calibration_poll(ah); 2305 2306 return IRQ_HANDLED; 2307 } 2308 2309 /* 2310 * Periodically recalibrate the PHY to account 2311 * for temperature/environment changes. 2312 */ 2313 static void 2314 ath5k_calibrate_work(struct work_struct *work) 2315 { 2316 struct ath5k_hw *ah = container_of(work, struct ath5k_hw, 2317 calib_work); 2318 2319 /* Should we run a full calibration ? */ 2320 if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) { 2321 2322 ah->ah_cal_next_full = jiffies + 2323 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL); 2324 ah->ah_cal_mask |= AR5K_CALIBRATION_FULL; 2325 2326 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, 2327 "running full calibration\n"); 2328 2329 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) { 2330 /* 2331 * Rfgain is out of bounds, reset the chip 2332 * to load new gain values. 2333 */ 2334 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 2335 "got new rfgain, resetting\n"); 2336 ieee80211_queue_work(ah->hw, &ah->reset_work); 2337 } 2338 } else 2339 ah->ah_cal_mask |= AR5K_CALIBRATION_SHORT; 2340 2341 2342 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n", 2343 ieee80211_frequency_to_channel(ah->curchan->center_freq), 2344 ah->curchan->hw_value); 2345 2346 if (ath5k_hw_phy_calibrate(ah, ah->curchan)) 2347 ATH5K_ERR(ah, "calibration of channel %u failed\n", 2348 ieee80211_frequency_to_channel( 2349 ah->curchan->center_freq)); 2350 2351 /* Clear calibration flags */ 2352 if (ah->ah_cal_mask & AR5K_CALIBRATION_FULL) 2353 ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL; 2354 else if (ah->ah_cal_mask & AR5K_CALIBRATION_SHORT) 2355 ah->ah_cal_mask &= ~AR5K_CALIBRATION_SHORT; 2356 } 2357 2358 2359 static void 2360 ath5k_tasklet_ani(unsigned long data) 2361 { 2362 struct ath5k_hw *ah = (void *)data; 2363 2364 ah->ah_cal_mask |= AR5K_CALIBRATION_ANI; 2365 ath5k_ani_calibration(ah); 2366 ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI; 2367 } 2368 2369 2370 static void 2371 ath5k_tx_complete_poll_work(struct work_struct *work) 2372 { 2373 struct ath5k_hw *ah = container_of(work, struct ath5k_hw, 2374 tx_complete_work.work); 2375 struct ath5k_txq *txq; 2376 int i; 2377 bool needreset = false; 2378 2379 mutex_lock(&ah->lock); 2380 2381 for (i = 0; i < ARRAY_SIZE(ah->txqs); i++) { 2382 if (ah->txqs[i].setup) { 2383 txq = &ah->txqs[i]; 2384 spin_lock_bh(&txq->lock); 2385 if (txq->txq_len > 1) { 2386 if (txq->txq_poll_mark) { 2387 ATH5K_DBG(ah, ATH5K_DEBUG_XMIT, 2388 "TX queue stuck %d\n", 2389 txq->qnum); 2390 needreset = true; 2391 txq->txq_stuck++; 2392 spin_unlock_bh(&txq->lock); 2393 break; 2394 } else { 2395 txq->txq_poll_mark = true; 2396 } 2397 } 2398 spin_unlock_bh(&txq->lock); 2399 } 2400 } 2401 2402 if (needreset) { 2403 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 2404 "TX queues stuck, resetting\n"); 2405 ath5k_reset(ah, NULL, true); 2406 } 2407 2408 mutex_unlock(&ah->lock); 2409 2410 ieee80211_queue_delayed_work(ah->hw, &ah->tx_complete_work, 2411 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT)); 2412 } 2413 2414 2415 /*************************\ 2416 * Initialization routines * 2417 \*************************/ 2418 2419 static const struct ieee80211_iface_limit if_limits[] = { 2420 { .max = 2048, .types = BIT(NL80211_IFTYPE_STATION) }, 2421 { .max = 4, .types = 2422 #ifdef CONFIG_MAC80211_MESH 2423 BIT(NL80211_IFTYPE_MESH_POINT) | 2424 #endif 2425 BIT(NL80211_IFTYPE_AP) }, 2426 }; 2427 2428 static const struct ieee80211_iface_combination if_comb = { 2429 .limits = if_limits, 2430 .n_limits = ARRAY_SIZE(if_limits), 2431 .max_interfaces = 2048, 2432 .num_different_channels = 1, 2433 }; 2434 2435 int __devinit 2436 ath5k_init_ah(struct ath5k_hw *ah, const struct ath_bus_ops *bus_ops) 2437 { 2438 struct ieee80211_hw *hw = ah->hw; 2439 struct ath_common *common; 2440 int ret; 2441 int csz; 2442 2443 /* Initialize driver private data */ 2444 SET_IEEE80211_DEV(hw, ah->dev); 2445 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | 2446 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | 2447 IEEE80211_HW_SIGNAL_DBM | 2448 IEEE80211_HW_REPORTS_TX_ACK_STATUS; 2449 2450 hw->wiphy->interface_modes = 2451 BIT(NL80211_IFTYPE_AP) | 2452 BIT(NL80211_IFTYPE_STATION) | 2453 BIT(NL80211_IFTYPE_ADHOC) | 2454 BIT(NL80211_IFTYPE_MESH_POINT); 2455 2456 hw->wiphy->iface_combinations = &if_comb; 2457 hw->wiphy->n_iface_combinations = 1; 2458 2459 /* SW support for IBSS_RSN is provided by mac80211 */ 2460 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 2461 2462 /* both antennas can be configured as RX or TX */ 2463 hw->wiphy->available_antennas_tx = 0x3; 2464 hw->wiphy->available_antennas_rx = 0x3; 2465 2466 hw->extra_tx_headroom = 2; 2467 hw->channel_change_time = 5000; 2468 2469 /* 2470 * Mark the device as detached to avoid processing 2471 * interrupts until setup is complete. 2472 */ 2473 __set_bit(ATH_STAT_INVALID, ah->status); 2474 2475 ah->opmode = NL80211_IFTYPE_STATION; 2476 ah->bintval = 1000; 2477 mutex_init(&ah->lock); 2478 spin_lock_init(&ah->rxbuflock); 2479 spin_lock_init(&ah->txbuflock); 2480 spin_lock_init(&ah->block); 2481 spin_lock_init(&ah->irqlock); 2482 2483 /* Setup interrupt handler */ 2484 ret = request_irq(ah->irq, ath5k_intr, IRQF_SHARED, "ath", ah); 2485 if (ret) { 2486 ATH5K_ERR(ah, "request_irq failed\n"); 2487 goto err; 2488 } 2489 2490 common = ath5k_hw_common(ah); 2491 common->ops = &ath5k_common_ops; 2492 common->bus_ops = bus_ops; 2493 common->ah = ah; 2494 common->hw = hw; 2495 common->priv = ah; 2496 common->clockrate = 40; 2497 2498 /* 2499 * Cache line size is used to size and align various 2500 * structures used to communicate with the hardware. 2501 */ 2502 ath5k_read_cachesize(common, &csz); 2503 common->cachelsz = csz << 2; /* convert to bytes */ 2504 2505 spin_lock_init(&common->cc_lock); 2506 2507 /* Initialize device */ 2508 ret = ath5k_hw_init(ah); 2509 if (ret) 2510 goto err_irq; 2511 2512 /* Set up multi-rate retry capabilities */ 2513 if (ah->ah_capabilities.cap_has_mrr_support) { 2514 hw->max_rates = 4; 2515 hw->max_rate_tries = max(AR5K_INIT_RETRY_SHORT, 2516 AR5K_INIT_RETRY_LONG); 2517 } 2518 2519 hw->vif_data_size = sizeof(struct ath5k_vif); 2520 2521 /* Finish private driver data initialization */ 2522 ret = ath5k_init(hw); 2523 if (ret) 2524 goto err_ah; 2525 2526 ATH5K_INFO(ah, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n", 2527 ath5k_chip_name(AR5K_VERSION_MAC, ah->ah_mac_srev), 2528 ah->ah_mac_srev, 2529 ah->ah_phy_revision); 2530 2531 if (!ah->ah_single_chip) { 2532 /* Single chip radio (!RF5111) */ 2533 if (ah->ah_radio_5ghz_revision && 2534 !ah->ah_radio_2ghz_revision) { 2535 /* No 5GHz support -> report 2GHz radio */ 2536 if (!test_bit(AR5K_MODE_11A, 2537 ah->ah_capabilities.cap_mode)) { 2538 ATH5K_INFO(ah, "RF%s 2GHz radio found (0x%x)\n", 2539 ath5k_chip_name(AR5K_VERSION_RAD, 2540 ah->ah_radio_5ghz_revision), 2541 ah->ah_radio_5ghz_revision); 2542 /* No 2GHz support (5110 and some 2543 * 5GHz only cards) -> report 5GHz radio */ 2544 } else if (!test_bit(AR5K_MODE_11B, 2545 ah->ah_capabilities.cap_mode)) { 2546 ATH5K_INFO(ah, "RF%s 5GHz radio found (0x%x)\n", 2547 ath5k_chip_name(AR5K_VERSION_RAD, 2548 ah->ah_radio_5ghz_revision), 2549 ah->ah_radio_5ghz_revision); 2550 /* Multiband radio */ 2551 } else { 2552 ATH5K_INFO(ah, "RF%s multiband radio found" 2553 " (0x%x)\n", 2554 ath5k_chip_name(AR5K_VERSION_RAD, 2555 ah->ah_radio_5ghz_revision), 2556 ah->ah_radio_5ghz_revision); 2557 } 2558 } 2559 /* Multi chip radio (RF5111 - RF2111) -> 2560 * report both 2GHz/5GHz radios */ 2561 else if (ah->ah_radio_5ghz_revision && 2562 ah->ah_radio_2ghz_revision) { 2563 ATH5K_INFO(ah, "RF%s 5GHz radio found (0x%x)\n", 2564 ath5k_chip_name(AR5K_VERSION_RAD, 2565 ah->ah_radio_5ghz_revision), 2566 ah->ah_radio_5ghz_revision); 2567 ATH5K_INFO(ah, "RF%s 2GHz radio found (0x%x)\n", 2568 ath5k_chip_name(AR5K_VERSION_RAD, 2569 ah->ah_radio_2ghz_revision), 2570 ah->ah_radio_2ghz_revision); 2571 } 2572 } 2573 2574 ath5k_debug_init_device(ah); 2575 2576 /* ready to process interrupts */ 2577 __clear_bit(ATH_STAT_INVALID, ah->status); 2578 2579 return 0; 2580 err_ah: 2581 ath5k_hw_deinit(ah); 2582 err_irq: 2583 free_irq(ah->irq, ah); 2584 err: 2585 return ret; 2586 } 2587 2588 static int 2589 ath5k_stop_locked(struct ath5k_hw *ah) 2590 { 2591 2592 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "invalid %u\n", 2593 test_bit(ATH_STAT_INVALID, ah->status)); 2594 2595 /* 2596 * Shutdown the hardware and driver: 2597 * stop output from above 2598 * disable interrupts 2599 * turn off timers 2600 * turn off the radio 2601 * clear transmit machinery 2602 * clear receive machinery 2603 * drain and release tx queues 2604 * reclaim beacon resources 2605 * power down hardware 2606 * 2607 * Note that some of this work is not possible if the 2608 * hardware is gone (invalid). 2609 */ 2610 ieee80211_stop_queues(ah->hw); 2611 2612 if (!test_bit(ATH_STAT_INVALID, ah->status)) { 2613 ath5k_led_off(ah); 2614 ath5k_hw_set_imr(ah, 0); 2615 synchronize_irq(ah->irq); 2616 ath5k_rx_stop(ah); 2617 ath5k_hw_dma_stop(ah); 2618 ath5k_drain_tx_buffs(ah); 2619 ath5k_hw_phy_disable(ah); 2620 } 2621 2622 return 0; 2623 } 2624 2625 int ath5k_start(struct ieee80211_hw *hw) 2626 { 2627 struct ath5k_hw *ah = hw->priv; 2628 struct ath_common *common = ath5k_hw_common(ah); 2629 int ret, i; 2630 2631 mutex_lock(&ah->lock); 2632 2633 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "mode %d\n", ah->opmode); 2634 2635 /* 2636 * Stop anything previously setup. This is safe 2637 * no matter this is the first time through or not. 2638 */ 2639 ath5k_stop_locked(ah); 2640 2641 /* 2642 * The basic interface to setting the hardware in a good 2643 * state is ``reset''. On return the hardware is known to 2644 * be powered up and with interrupts disabled. This must 2645 * be followed by initialization of the appropriate bits 2646 * and then setup of the interrupt mask. 2647 */ 2648 ah->curchan = ah->hw->conf.channel; 2649 ah->imask = AR5K_INT_RXOK 2650 | AR5K_INT_RXERR 2651 | AR5K_INT_RXEOL 2652 | AR5K_INT_RXORN 2653 | AR5K_INT_TXDESC 2654 | AR5K_INT_TXEOL 2655 | AR5K_INT_FATAL 2656 | AR5K_INT_GLOBAL 2657 | AR5K_INT_MIB; 2658 2659 ret = ath5k_reset(ah, NULL, false); 2660 if (ret) 2661 goto done; 2662 2663 if (!ath5k_modparam_no_hw_rfkill_switch) 2664 ath5k_rfkill_hw_start(ah); 2665 2666 /* 2667 * Reset the key cache since some parts do not reset the 2668 * contents on initial power up or resume from suspend. 2669 */ 2670 for (i = 0; i < common->keymax; i++) 2671 ath_hw_keyreset(common, (u16) i); 2672 2673 /* Use higher rates for acks instead of base 2674 * rate */ 2675 ah->ah_ack_bitrate_high = true; 2676 2677 for (i = 0; i < ARRAY_SIZE(ah->bslot); i++) 2678 ah->bslot[i] = NULL; 2679 2680 ret = 0; 2681 done: 2682 mmiowb(); 2683 mutex_unlock(&ah->lock); 2684 2685 ieee80211_queue_delayed_work(ah->hw, &ah->tx_complete_work, 2686 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT)); 2687 2688 return ret; 2689 } 2690 2691 static void ath5k_stop_tasklets(struct ath5k_hw *ah) 2692 { 2693 ah->rx_pending = false; 2694 ah->tx_pending = false; 2695 tasklet_kill(&ah->rxtq); 2696 tasklet_kill(&ah->txtq); 2697 tasklet_kill(&ah->beacontq); 2698 tasklet_kill(&ah->ani_tasklet); 2699 } 2700 2701 /* 2702 * Stop the device, grabbing the top-level lock to protect 2703 * against concurrent entry through ath5k_init (which can happen 2704 * if another thread does a system call and the thread doing the 2705 * stop is preempted). 2706 */ 2707 void ath5k_stop(struct ieee80211_hw *hw) 2708 { 2709 struct ath5k_hw *ah = hw->priv; 2710 int ret; 2711 2712 mutex_lock(&ah->lock); 2713 ret = ath5k_stop_locked(ah); 2714 if (ret == 0 && !test_bit(ATH_STAT_INVALID, ah->status)) { 2715 /* 2716 * Don't set the card in full sleep mode! 2717 * 2718 * a) When the device is in this state it must be carefully 2719 * woken up or references to registers in the PCI clock 2720 * domain may freeze the bus (and system). This varies 2721 * by chip and is mostly an issue with newer parts 2722 * (madwifi sources mentioned srev >= 0x78) that go to 2723 * sleep more quickly. 2724 * 2725 * b) On older chips full sleep results a weird behaviour 2726 * during wakeup. I tested various cards with srev < 0x78 2727 * and they don't wake up after module reload, a second 2728 * module reload is needed to bring the card up again. 2729 * 2730 * Until we figure out what's going on don't enable 2731 * full chip reset on any chip (this is what Legacy HAL 2732 * and Sam's HAL do anyway). Instead Perform a full reset 2733 * on the device (same as initial state after attach) and 2734 * leave it idle (keep MAC/BB on warm reset) */ 2735 ret = ath5k_hw_on_hold(ah); 2736 2737 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, 2738 "putting device to sleep\n"); 2739 } 2740 2741 mmiowb(); 2742 mutex_unlock(&ah->lock); 2743 2744 ath5k_stop_tasklets(ah); 2745 2746 cancel_delayed_work_sync(&ah->tx_complete_work); 2747 2748 if (!ath5k_modparam_no_hw_rfkill_switch) 2749 ath5k_rfkill_hw_stop(ah); 2750 } 2751 2752 /* 2753 * Reset the hardware. If chan is not NULL, then also pause rx/tx 2754 * and change to the given channel. 2755 * 2756 * This should be called with ah->lock. 2757 */ 2758 static int 2759 ath5k_reset(struct ath5k_hw *ah, struct ieee80211_channel *chan, 2760 bool skip_pcu) 2761 { 2762 struct ath_common *common = ath5k_hw_common(ah); 2763 int ret, ani_mode; 2764 bool fast; 2765 2766 ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "resetting\n"); 2767 2768 ath5k_hw_set_imr(ah, 0); 2769 synchronize_irq(ah->irq); 2770 ath5k_stop_tasklets(ah); 2771 2772 /* Save ani mode and disable ANI during 2773 * reset. If we don't we might get false 2774 * PHY error interrupts. */ 2775 ani_mode = ah->ani_state.ani_mode; 2776 ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF); 2777 2778 /* We are going to empty hw queues 2779 * so we should also free any remaining 2780 * tx buffers */ 2781 ath5k_drain_tx_buffs(ah); 2782 if (chan) 2783 ah->curchan = chan; 2784 2785 fast = ((chan != NULL) && modparam_fastchanswitch) ? 1 : 0; 2786 2787 ret = ath5k_hw_reset(ah, ah->opmode, ah->curchan, fast, skip_pcu); 2788 if (ret) { 2789 ATH5K_ERR(ah, "can't reset hardware (%d)\n", ret); 2790 goto err; 2791 } 2792 2793 ret = ath5k_rx_start(ah); 2794 if (ret) { 2795 ATH5K_ERR(ah, "can't start recv logic\n"); 2796 goto err; 2797 } 2798 2799 ath5k_ani_init(ah, ani_mode); 2800 2801 /* 2802 * Set calibration intervals 2803 * 2804 * Note: We don't need to run calibration imediately 2805 * since some initial calibration is done on reset 2806 * even for fast channel switching. Also on scanning 2807 * this will get set again and again and it won't get 2808 * executed unless we connect somewhere and spend some 2809 * time on the channel (that's what calibration needs 2810 * anyway to be accurate). 2811 */ 2812 ah->ah_cal_next_full = jiffies + 2813 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL); 2814 ah->ah_cal_next_ani = jiffies + 2815 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI); 2816 ah->ah_cal_next_short = jiffies + 2817 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_SHORT); 2818 2819 ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8); 2820 2821 /* clear survey data and cycle counters */ 2822 memset(&ah->survey, 0, sizeof(ah->survey)); 2823 spin_lock_bh(&common->cc_lock); 2824 ath_hw_cycle_counters_update(common); 2825 memset(&common->cc_survey, 0, sizeof(common->cc_survey)); 2826 memset(&common->cc_ani, 0, sizeof(common->cc_ani)); 2827 spin_unlock_bh(&common->cc_lock); 2828 2829 /* 2830 * Change channels and update the h/w rate map if we're switching; 2831 * e.g. 11a to 11b/g. 2832 * 2833 * We may be doing a reset in response to an ioctl that changes the 2834 * channel so update any state that might change as a result. 2835 * 2836 * XXX needed? 2837 */ 2838 /* ath5k_chan_change(ah, c); */ 2839 2840 ath5k_beacon_config(ah); 2841 /* intrs are enabled by ath5k_beacon_config */ 2842 2843 ieee80211_wake_queues(ah->hw); 2844 2845 return 0; 2846 err: 2847 return ret; 2848 } 2849 2850 static void ath5k_reset_work(struct work_struct *work) 2851 { 2852 struct ath5k_hw *ah = container_of(work, struct ath5k_hw, 2853 reset_work); 2854 2855 mutex_lock(&ah->lock); 2856 ath5k_reset(ah, NULL, true); 2857 mutex_unlock(&ah->lock); 2858 } 2859 2860 static int __devinit 2861 ath5k_init(struct ieee80211_hw *hw) 2862 { 2863 2864 struct ath5k_hw *ah = hw->priv; 2865 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah); 2866 struct ath5k_txq *txq; 2867 u8 mac[ETH_ALEN] = {}; 2868 int ret; 2869 2870 2871 /* 2872 * Collect the channel list. The 802.11 layer 2873 * is responsible for filtering this list based 2874 * on settings like the phy mode and regulatory 2875 * domain restrictions. 2876 */ 2877 ret = ath5k_setup_bands(hw); 2878 if (ret) { 2879 ATH5K_ERR(ah, "can't get channels\n"); 2880 goto err; 2881 } 2882 2883 /* 2884 * Allocate tx+rx descriptors and populate the lists. 2885 */ 2886 ret = ath5k_desc_alloc(ah); 2887 if (ret) { 2888 ATH5K_ERR(ah, "can't allocate descriptors\n"); 2889 goto err; 2890 } 2891 2892 /* 2893 * Allocate hardware transmit queues: one queue for 2894 * beacon frames and one data queue for each QoS 2895 * priority. Note that hw functions handle resetting 2896 * these queues at the needed time. 2897 */ 2898 ret = ath5k_beaconq_setup(ah); 2899 if (ret < 0) { 2900 ATH5K_ERR(ah, "can't setup a beacon xmit queue\n"); 2901 goto err_desc; 2902 } 2903 ah->bhalq = ret; 2904 ah->cabq = ath5k_txq_setup(ah, AR5K_TX_QUEUE_CAB, 0); 2905 if (IS_ERR(ah->cabq)) { 2906 ATH5K_ERR(ah, "can't setup cab queue\n"); 2907 ret = PTR_ERR(ah->cabq); 2908 goto err_bhal; 2909 } 2910 2911 /* 5211 and 5212 usually support 10 queues but we better rely on the 2912 * capability information */ 2913 if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) { 2914 /* This order matches mac80211's queue priority, so we can 2915 * directly use the mac80211 queue number without any mapping */ 2916 txq = ath5k_txq_setup(ah, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO); 2917 if (IS_ERR(txq)) { 2918 ATH5K_ERR(ah, "can't setup xmit queue\n"); 2919 ret = PTR_ERR(txq); 2920 goto err_queues; 2921 } 2922 txq = ath5k_txq_setup(ah, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI); 2923 if (IS_ERR(txq)) { 2924 ATH5K_ERR(ah, "can't setup xmit queue\n"); 2925 ret = PTR_ERR(txq); 2926 goto err_queues; 2927 } 2928 txq = ath5k_txq_setup(ah, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE); 2929 if (IS_ERR(txq)) { 2930 ATH5K_ERR(ah, "can't setup xmit queue\n"); 2931 ret = PTR_ERR(txq); 2932 goto err_queues; 2933 } 2934 txq = ath5k_txq_setup(ah, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK); 2935 if (IS_ERR(txq)) { 2936 ATH5K_ERR(ah, "can't setup xmit queue\n"); 2937 ret = PTR_ERR(txq); 2938 goto err_queues; 2939 } 2940 hw->queues = 4; 2941 } else { 2942 /* older hardware (5210) can only support one data queue */ 2943 txq = ath5k_txq_setup(ah, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE); 2944 if (IS_ERR(txq)) { 2945 ATH5K_ERR(ah, "can't setup xmit queue\n"); 2946 ret = PTR_ERR(txq); 2947 goto err_queues; 2948 } 2949 hw->queues = 1; 2950 } 2951 2952 tasklet_init(&ah->rxtq, ath5k_tasklet_rx, (unsigned long)ah); 2953 tasklet_init(&ah->txtq, ath5k_tasklet_tx, (unsigned long)ah); 2954 tasklet_init(&ah->beacontq, ath5k_tasklet_beacon, (unsigned long)ah); 2955 tasklet_init(&ah->ani_tasklet, ath5k_tasklet_ani, (unsigned long)ah); 2956 2957 INIT_WORK(&ah->reset_work, ath5k_reset_work); 2958 INIT_WORK(&ah->calib_work, ath5k_calibrate_work); 2959 INIT_DELAYED_WORK(&ah->tx_complete_work, ath5k_tx_complete_poll_work); 2960 2961 ret = ath5k_hw_common(ah)->bus_ops->eeprom_read_mac(ah, mac); 2962 if (ret) { 2963 ATH5K_ERR(ah, "unable to read address from EEPROM\n"); 2964 goto err_queues; 2965 } 2966 2967 SET_IEEE80211_PERM_ADDR(hw, mac); 2968 /* All MAC address bits matter for ACKs */ 2969 ath5k_update_bssid_mask_and_opmode(ah, NULL); 2970 2971 regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain; 2972 ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier); 2973 if (ret) { 2974 ATH5K_ERR(ah, "can't initialize regulatory system\n"); 2975 goto err_queues; 2976 } 2977 2978 ret = ieee80211_register_hw(hw); 2979 if (ret) { 2980 ATH5K_ERR(ah, "can't register ieee80211 hw\n"); 2981 goto err_queues; 2982 } 2983 2984 if (!ath_is_world_regd(regulatory)) 2985 regulatory_hint(hw->wiphy, regulatory->alpha2); 2986 2987 ath5k_init_leds(ah); 2988 2989 ath5k_sysfs_register(ah); 2990 2991 return 0; 2992 err_queues: 2993 ath5k_txq_release(ah); 2994 err_bhal: 2995 ath5k_hw_release_tx_queue(ah, ah->bhalq); 2996 err_desc: 2997 ath5k_desc_free(ah); 2998 err: 2999 return ret; 3000 } 3001 3002 void 3003 ath5k_deinit_ah(struct ath5k_hw *ah) 3004 { 3005 struct ieee80211_hw *hw = ah->hw; 3006 3007 /* 3008 * NB: the order of these is important: 3009 * o call the 802.11 layer before detaching ath5k_hw to 3010 * ensure callbacks into the driver to delete global 3011 * key cache entries can be handled 3012 * o reclaim the tx queue data structures after calling 3013 * the 802.11 layer as we'll get called back to reclaim 3014 * node state and potentially want to use them 3015 * o to cleanup the tx queues the hal is called, so detach 3016 * it last 3017 * XXX: ??? detach ath5k_hw ??? 3018 * Other than that, it's straightforward... 3019 */ 3020 ieee80211_unregister_hw(hw); 3021 ath5k_desc_free(ah); 3022 ath5k_txq_release(ah); 3023 ath5k_hw_release_tx_queue(ah, ah->bhalq); 3024 ath5k_unregister_leds(ah); 3025 3026 ath5k_sysfs_unregister(ah); 3027 /* 3028 * NB: can't reclaim these until after ieee80211_ifdetach 3029 * returns because we'll get called back to reclaim node 3030 * state and potentially want to use them. 3031 */ 3032 ath5k_hw_deinit(ah); 3033 free_irq(ah->irq, ah); 3034 } 3035 3036 bool 3037 ath5k_any_vif_assoc(struct ath5k_hw *ah) 3038 { 3039 struct ath5k_vif_iter_data iter_data; 3040 iter_data.hw_macaddr = NULL; 3041 iter_data.any_assoc = false; 3042 iter_data.need_set_hw_addr = false; 3043 iter_data.found_active = true; 3044 3045 ieee80211_iterate_active_interfaces_atomic(ah->hw, ath5k_vif_iter, 3046 &iter_data); 3047 return iter_data.any_assoc; 3048 } 3049 3050 void 3051 ath5k_set_beacon_filter(struct ieee80211_hw *hw, bool enable) 3052 { 3053 struct ath5k_hw *ah = hw->priv; 3054 u32 rfilt; 3055 rfilt = ath5k_hw_get_rx_filter(ah); 3056 if (enable) 3057 rfilt |= AR5K_RX_FILTER_BEACON; 3058 else 3059 rfilt &= ~AR5K_RX_FILTER_BEACON; 3060 ath5k_hw_set_rx_filter(ah, rfilt); 3061 ah->filter_flags = rfilt; 3062 } 3063 3064 void _ath5k_printk(const struct ath5k_hw *ah, const char *level, 3065 const char *fmt, ...) 3066 { 3067 struct va_format vaf; 3068 va_list args; 3069 3070 va_start(args, fmt); 3071 3072 vaf.fmt = fmt; 3073 vaf.va = &args; 3074 3075 if (ah && ah->hw) 3076 printk("%s" pr_fmt("%s: %pV"), 3077 level, wiphy_name(ah->hw->wiphy), &vaf); 3078 else 3079 printk("%s" pr_fmt("%pV"), level, &vaf); 3080 3081 va_end(args); 3082 } 3083