drivers/net/wireless/iwlegacy/common.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/types.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/init.h>
  37 #include <linux/pci.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/skbuff.h>
  41 #include <net/mac80211.h>
  42
  43 #include "iwl-debug.h"
  44 #include "common.h"
  45
  46 const char *il_get_cmd_string(u8 cmd)
  47 {
  48         switch (cmd) {
  49                 IL_CMD(N_ALIVE);
  50                 IL_CMD(N_ERROR);
  51                 IL_CMD(C_RXON);
  52                 IL_CMD(C_RXON_ASSOC);
  53                 IL_CMD(C_QOS_PARAM);
  54                 IL_CMD(C_RXON_TIMING);
  55                 IL_CMD(C_ADD_STA);
  56                 IL_CMD(C_REM_STA);
  57                 IL_CMD(C_WEPKEY);
  58                 IL_CMD(N_3945_RX);
  59                 IL_CMD(C_TX);
  60                 IL_CMD(C_RATE_SCALE);
  61                 IL_CMD(C_LEDS);
  62                 IL_CMD(C_TX_LINK_QUALITY_CMD);
  63                 IL_CMD(C_CHANNEL_SWITCH);
  64                 IL_CMD(N_CHANNEL_SWITCH);
  65                 IL_CMD(C_SPECTRUM_MEASUREMENT);
  66                 IL_CMD(N_SPECTRUM_MEASUREMENT);
  67                 IL_CMD(C_POWER_TBL);
  68                 IL_CMD(N_PM_SLEEP);
  69                 IL_CMD(N_PM_DEBUG_STATS);
  70                 IL_CMD(C_SCAN);
  71                 IL_CMD(C_SCAN_ABORT);
  72                 IL_CMD(N_SCAN_START);
  73                 IL_CMD(N_SCAN_RESULTS);
  74                 IL_CMD(N_SCAN_COMPLETE);
  75                 IL_CMD(N_BEACON);
  76                 IL_CMD(C_TX_BEACON);
  77                 IL_CMD(C_TX_PWR_TBL);
  78                 IL_CMD(C_BT_CONFIG);
  79                 IL_CMD(C_STATS);
  80                 IL_CMD(N_STATS);
  81                 IL_CMD(N_CARD_STATE);
  82                 IL_CMD(N_MISSED_BEACONS);
  83                 IL_CMD(C_CT_KILL_CONFIG);
  84                 IL_CMD(C_SENSITIVITY);
  85                 IL_CMD(C_PHY_CALIBRATION);
  86                 IL_CMD(N_RX_PHY);
  87                 IL_CMD(N_RX_MPDU);
  88                 IL_CMD(N_RX);
  89                 IL_CMD(N_COMPRESSED_BA);
  90         default:
  91                 return "UNKNOWN";
  92
  93         }
  94 }
  95 EXPORT_SYMBOL(il_get_cmd_string);
  96
  97 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
  98
  99 static void il_generic_cmd_callback(struct il_priv *il,
 100                                      struct il_device_cmd *cmd,
 101                                      struct il_rx_pkt *pkt)
 102 {
 103         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 104                 IL_ERR("Bad return from %s (0x%08X)\n",
 105                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 106                 return;
 107         }
 108
 109 #ifdef CONFIG_IWLEGACY_DEBUG
 110         switch (cmd->hdr.cmd) {
 111         case C_TX_LINK_QUALITY_CMD:
 112         case C_SENSITIVITY:
 113                 D_HC_DUMP("back from %s (0x%08X)\n",
 114                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 115                 break;
 116         default:
 117                 D_HC("back from %s (0x%08X)\n",
 118                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 119         }
 120 #endif
 121 }
 122
 123 static int
 124 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 125 {
 126         int ret;
 127
 128         BUG_ON(!(cmd->flags & CMD_ASYNC));
 129
 130         /* An asynchronous command can not expect an SKB to be set. */
 131         BUG_ON(cmd->flags & CMD_WANT_SKB);
 132
 133         /* Assign a generic callback if one is not provided */
 134         if (!cmd->callback)
 135                 cmd->callback = il_generic_cmd_callback;
 136
 137         if (test_bit(S_EXIT_PENDING, &il->status))
 138                 return -EBUSY;
 139
 140         ret = il_enqueue_hcmd(il, cmd);
 141         if (ret < 0) {
 142                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 143                           il_get_cmd_string(cmd->id), ret);
 144                 return ret;
 145         }
 146         return 0;
 147 }
 148
 149 int il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 150 {
 151         int cmd_idx;
 152         int ret;
 153
 154         lockdep_assert_held(&il->mutex);
 155
 156         BUG_ON(cmd->flags & CMD_ASYNC);
 157
 158          /* A synchronous command can not have a callback set. */
 159         BUG_ON(cmd->callback);
 160
 161         D_INFO("Attempting to send sync command %s\n",
 162                         il_get_cmd_string(cmd->id));
 163
 164         set_bit(S_HCMD_ACTIVE, &il->status);
 165         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 166                         il_get_cmd_string(cmd->id));
 167
 168         cmd_idx = il_enqueue_hcmd(il, cmd);
 169         if (cmd_idx < 0) {
 170                 ret = cmd_idx;
 171                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 172                           il_get_cmd_string(cmd->id), ret);
 173                 goto out;
 174         }
 175
 176         ret = wait_event_timeout(il->wait_command_queue,
 177                         !test_bit(S_HCMD_ACTIVE, &il->status),
 178                         HOST_COMPLETE_TIMEOUT);
 179         if (!ret) {
 180                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 181                         IL_ERR(
 182                                 "Error sending %s: time out after %dms.\n",
 183                                 il_get_cmd_string(cmd->id),
 184                                 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 185
 186                         clear_bit(S_HCMD_ACTIVE, &il->status);
 187                         D_INFO(
 188                                 "Clearing HCMD_ACTIVE for command %s\n",
 189                                        il_get_cmd_string(cmd->id));
 190                         ret = -ETIMEDOUT;
 191                         goto cancel;
 192                 }
 193         }
 194
 195         if (test_bit(S_RF_KILL_HW, &il->status)) {
 196                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 197                                il_get_cmd_string(cmd->id));
 198                 ret = -ECANCELED;
 199                 goto fail;
 200         }
 201         if (test_bit(S_FW_ERROR, &il->status)) {
 202                 IL_ERR("Command %s failed: FW Error\n",
 203                                il_get_cmd_string(cmd->id));
 204                 ret = -EIO;
 205                 goto fail;
 206         }
 207         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 208                 IL_ERR("Error: Response NULL in '%s'\n",
 209                           il_get_cmd_string(cmd->id));
 210                 ret = -EIO;
 211                 goto cancel;
 212         }
 213
 214         ret = 0;
 215         goto out;
 216
 217 cancel:
 218         if (cmd->flags & CMD_WANT_SKB) {
 219                 /*
 220                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 221                  * TX cmd queue. Otherwise in case the cmd comes
 222                  * in later, it will possibly set an invalid
 223                  * address (cmd->meta.source).
 224                  */
 225                 il->txq[il->cmd_queue].meta[cmd_idx].flags &=
 226                                                         ~CMD_WANT_SKB;
 227         }
 228 fail:
 229         if (cmd->reply_page) {
 230                 il_free_pages(il, cmd->reply_page);
 231                 cmd->reply_page = 0;
 232         }
 233 out:
 234         return ret;
 235 }
 236 EXPORT_SYMBOL(il_send_cmd_sync);
 237
 238 int il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 239 {
 240         if (cmd->flags & CMD_ASYNC)
 241                 return il_send_cmd_async(il, cmd);
 242
 243         return il_send_cmd_sync(il, cmd);
 244 }
 245 EXPORT_SYMBOL(il_send_cmd);
 246
 247 int
 248 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 249 {
 250         struct il_host_cmd cmd = {
 251                 .id = id,
 252                 .len = len,
 253                 .data = data,
 254         };
 255
 256         return il_send_cmd_sync(il, &cmd);
 257 }
 258 EXPORT_SYMBOL(il_send_cmd_pdu);
 259
 260 int il_send_cmd_pdu_async(struct il_priv *il,
 261                            u8 id, u16 len, const void *data,
 262                            void (*callback)(struct il_priv *il,
 263                                             struct il_device_cmd *cmd,
 264                                             struct il_rx_pkt *pkt))
 265 {
 266         struct il_host_cmd cmd = {
 267                 .id = id,
 268                 .len = len,
 269                 .data = data,
 270         };
 271
 272         cmd.flags |= CMD_ASYNC;
 273         cmd.callback = callback;
 274
 275         return il_send_cmd_async(il, &cmd);
 276 }
 277 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 278
 279 /* default: IL_LED_BLINK(0) using blinking idx table */
 280 static int led_mode;
 281 module_param(led_mode, int, S_IRUGO);
 282 MODULE_PARM_DESC(led_mode, "0=system default, "
 283                 "1=On(RF On)/Off(RF Off), 2=blinking");
 284
 285 /* Throughput           OFF time(ms)    ON time (ms)
 286  *      >300                    25              25
 287  *      >200 to 300             40              40
 288  *      >100 to 200             55              55
 289  *      >70 to 100              65              65
 290  *      >50 to 70               75              75
 291  *      >20 to 50               85              85
 292  *      >10 to 20               95              95
 293  *      >5 to 10                110             110
 294  *      >1 to 5                 130             130
 295  *      >0 to 1                 167             167
 296  *      <=0                                     SOLID ON
 297  */
 298 static const struct ieee80211_tpt_blink il_blink[] = {
 299         { .throughput = 0, .blink_time = 334 },
 300         { .throughput = 1 * 1024 - 1, .blink_time = 260 },
 301         { .throughput = 5 * 1024 - 1, .blink_time = 220 },
 302         { .throughput = 10 * 1024 - 1, .blink_time = 190 },
 303         { .throughput = 20 * 1024 - 1, .blink_time = 170 },
 304         { .throughput = 50 * 1024 - 1, .blink_time = 150 },
 305         { .throughput = 70 * 1024 - 1, .blink_time = 130 },
 306         { .throughput = 100 * 1024 - 1, .blink_time = 110 },
 307         { .throughput = 200 * 1024 - 1, .blink_time = 80 },
 308         { .throughput = 300 * 1024 - 1, .blink_time = 50 },
 309 };
 310
 311 /*
 312  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 313  * Led blink rate analysis showed an average deviation of 0% on 3945,
 314  * 5% on 4965 HW.
 315  * Need to compensate on the led on/off time per HW according to the deviation
 316  * to achieve the desired led frequency
 317  * The calculation is: (100-averageDeviation)/100 * blinkTime
 318  * For code efficiency the calculation will be:
 319  *     compensation = (100 - averageDeviation) * 64 / 100
 320  *     NewBlinkTime = (compensation * BlinkTime) / 64
 321  */
 322 static inline u8 il_blink_compensation(struct il_priv *il,
 323                                     u8 time, u16 compensation)
 324 {
 325         if (!compensation) {
 326                 IL_ERR("undefined blink compensation: "
 327                         "use pre-defined blinking time\n");
 328                 return time;
 329         }
 330
 331         return (u8)((time * compensation) >> 6);
 332 }
 333
 334 /* Set led pattern command */
 335 static int il_led_cmd(struct il_priv *il,
 336                        unsigned long on,
 337                        unsigned long off)
 338 {
 339         struct il_led_cmd led_cmd = {
 340                 .id = IL_LED_LINK,
 341                 .interval = IL_DEF_LED_INTRVL
 342         };
 343         int ret;
 344
 345         if (!test_bit(S_READY, &il->status))
 346                 return -EBUSY;
 347
 348         if (il->blink_on == on && il->blink_off == off)
 349                 return 0;
 350
 351         if (off == 0) {
 352                 /* led is SOLID_ON */
 353                 on = IL_LED_SOLID;
 354         }
 355
 356         D_LED("Led blink time compensation=%u\n",
 357                         il->cfg->base_params->led_compensation);
 358         led_cmd.on = il_blink_compensation(il, on,
 359                                 il->cfg->base_params->led_compensation);
 360         led_cmd.off = il_blink_compensation(il, off,
 361                                 il->cfg->base_params->led_compensation);
 362
 363         ret = il->cfg->ops->led->cmd(il, &led_cmd);
 364         if (!ret) {
 365                 il->blink_on = on;
 366                 il->blink_off = off;
 367         }
 368         return ret;
 369 }
 370
 371 static void il_led_brightness_set(struct led_classdev *led_cdev,
 372                                    enum led_brightness brightness)
 373 {
 374         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 375         unsigned long on = 0;
 376
 377         if (brightness > 0)
 378                 on = IL_LED_SOLID;
 379
 380         il_led_cmd(il, on, 0);
 381 }
 382
 383 static int il_led_blink_set(struct led_classdev *led_cdev,
 384                              unsigned long *delay_on,
 385                              unsigned long *delay_off)
 386 {
 387         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 388
 389         return il_led_cmd(il, *delay_on, *delay_off);
 390 }
 391
 392 void il_leds_init(struct il_priv *il)
 393 {
 394         int mode = led_mode;
 395         int ret;
 396
 397         if (mode == IL_LED_DEFAULT)
 398                 mode = il->cfg->led_mode;
 399
 400         il->led.name = kasprintf(GFP_KERNEL, "%s-led",
 401                                    wiphy_name(il->hw->wiphy));
 402         il->led.brightness_set = il_led_brightness_set;
 403         il->led.blink_set = il_led_blink_set;
 404         il->led.max_brightness = 1;
 405
 406         switch (mode) {
 407         case IL_LED_DEFAULT:
 408                 WARN_ON(1);
 409                 break;
 410         case IL_LED_BLINK:
 411                 il->led.default_trigger =
 412                         ieee80211_create_tpt_led_trigger(il->hw,
 413                                         IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 414                                         il_blink, ARRAY_SIZE(il_blink));
 415                 break;
 416         case IL_LED_RF_STATE:
 417                 il->led.default_trigger =
 418                         ieee80211_get_radio_led_name(il->hw);
 419                 break;
 420         }
 421
 422         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 423         if (ret) {
 424                 kfree(il->led.name);
 425                 return;
 426         }
 427
 428         il->led_registered = true;
 429 }
 430 EXPORT_SYMBOL(il_leds_init);
 431
 432 void il_leds_exit(struct il_priv *il)
 433 {
 434         if (!il->led_registered)
 435                 return;
 436
 437         led_classdev_unregister(&il->led);
 438         kfree(il->led.name);
 439 }
 440 EXPORT_SYMBOL(il_leds_exit);
 441
 442 /************************** EEPROM BANDS ****************************
 443  *
 444  * The il_eeprom_band definitions below provide the mapping from the
 445  * EEPROM contents to the specific channel number supported for each
 446  * band.
 447  *
 448  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 449  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 450  * The specific geography and calibration information for that channel
 451  * is contained in the eeprom map itself.
 452  *
 453  * During init, we copy the eeprom information and channel map
 454  * information into il->channel_info_24/52 and il->channel_map_24/52
 455  *
 456  * channel_map_24/52 provides the idx in the channel_info array for a
 457  * given channel.  We have to have two separate maps as there is channel
 458  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 459  * band_2
 460  *
 461  * A value of 0xff stored in the channel_map indicates that the channel
 462  * is not supported by the hardware at all.
 463  *
 464  * A value of 0xfe in the channel_map indicates that the channel is not
 465  * valid for Tx with the current hardware.  This means that
 466  * while the system can tune and receive on a given channel, it may not
 467  * be able to associate or transmit any frames on that
 468  * channel.  There is no corresponding channel information for that
 469  * entry.
 470  *
 471  *********************************************************************/
 472
 473 /* 2.4 GHz */
 474 const u8 il_eeprom_band_1[14] = {
 475         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 476 };
 477
 478 /* 5.2 GHz bands */
 479 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 480         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 481 };
 482
 483 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 484         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 485 };
 486
 487 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 488         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 489 };
 490
 491 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 492         145, 149, 153, 157, 161, 165
 493 };
 494
 495 static const u8 il_eeprom_band_6[] = {       /* 2.4 ht40 channel */
 496         1, 2, 3, 4, 5, 6, 7
 497 };
 498
 499 static const u8 il_eeprom_band_7[] = {       /* 5.2 ht40 channel */
 500         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 501 };
 502
 503 /******************************************************************************
 504  *
 505  * EEPROM related functions
 506  *
 507 ******************************************************************************/
 508
 509 static int il_eeprom_verify_signature(struct il_priv *il)
 510 {
 511         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 512         int ret = 0;
 513
 514         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 515         switch (gp) {
 516         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 517         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 518                 break;
 519         default:
 520                 IL_ERR("bad EEPROM signature,"
 521                         "EEPROM_GP=0x%08x\n", gp);
 522                 ret = -ENOENT;
 523                 break;
 524         }
 525         return ret;
 526 }
 527
 528 const u8
 529 *il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 530 {
 531         BUG_ON(offset >= il->cfg->base_params->eeprom_size);
 532         return &il->eeprom[offset];
 533 }
 534 EXPORT_SYMBOL(il_eeprom_query_addr);
 535
 536 u16 il_eeprom_query16(const struct il_priv *il, size_t offset)
 537 {
 538         if (!il->eeprom)
 539                 return 0;
 540         return (u16)il->eeprom[offset] | ((u16)il->eeprom[offset + 1] << 8);
 541 }
 542 EXPORT_SYMBOL(il_eeprom_query16);
 543
 544 /**
 545  * il_eeprom_init - read EEPROM contents
 546  *
 547  * Load the EEPROM contents from adapter into il->eeprom
 548  *
 549  * NOTE:  This routine uses the non-debug IO access functions.
 550  */
 551 int il_eeprom_init(struct il_priv *il)
 552 {
 553         __le16 *e;
 554         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 555         int sz;
 556         int ret;
 557         u16 addr;
 558
 559         /* allocate eeprom */
 560         sz = il->cfg->base_params->eeprom_size;
 561         D_EEPROM("NVM size = %d\n", sz);
 562         il->eeprom = kzalloc(sz, GFP_KERNEL);
 563         if (!il->eeprom) {
 564                 ret = -ENOMEM;
 565                 goto alloc_err;
 566         }
 567         e = (__le16 *)il->eeprom;
 568
 569         il->cfg->ops->lib->apm_ops.init(il);
 570
 571         ret = il_eeprom_verify_signature(il);
 572         if (ret < 0) {
 573                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 574                 ret = -ENOENT;
 575                 goto err;
 576         }
 577
 578         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 579         ret = il->cfg->ops->lib->eeprom_ops.acquire_semaphore(il);
 580         if (ret < 0) {
 581                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 582                 ret = -ENOENT;
 583                 goto err;
 584         }
 585
 586         /* eeprom is an array of 16bit values */
 587         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 588                 u32 r;
 589
 590                 _il_wr(il, CSR_EEPROM_REG,
 591                              CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 592
 593                 ret = _il_poll_bit(il, CSR_EEPROM_REG,
 594                                           CSR_EEPROM_REG_READ_VALID_MSK,
 595                                           CSR_EEPROM_REG_READ_VALID_MSK,
 596                                           IL_EEPROM_ACCESS_TIMEOUT);
 597                 if (ret < 0) {
 598                         IL_ERR("Time out reading EEPROM[%d]\n",
 599                                                         addr);
 600                         goto done;
 601                 }
 602                 r = _il_rd(il, CSR_EEPROM_REG);
 603                 e[addr / 2] = cpu_to_le16(r >> 16);
 604         }
 605
 606         D_EEPROM("NVM Type: %s, version: 0x%x\n",
 607                        "EEPROM",
 608                        il_eeprom_query16(il, EEPROM_VERSION));
 609
 610         ret = 0;
 611 done:
 612         il->cfg->ops->lib->eeprom_ops.release_semaphore(il);
 613
 614 err:
 615         if (ret)
 616                 il_eeprom_free(il);
 617         /* Reset chip to save power until we load uCode during "up". */
 618         il_apm_stop(il);
 619 alloc_err:
 620         return ret;
 621 }
 622 EXPORT_SYMBOL(il_eeprom_init);
 623
 624 void il_eeprom_free(struct il_priv *il)
 625 {
 626         kfree(il->eeprom);
 627         il->eeprom = NULL;
 628 }
 629 EXPORT_SYMBOL(il_eeprom_free);
 630
 631 static void il_init_band_reference(const struct il_priv *il,
 632                         int eep_band, int *eeprom_ch_count,
 633                         const struct il_eeprom_channel **eeprom_ch_info,
 634                         const u8 **eeprom_ch_idx)
 635 {
 636         u32 offset = il->cfg->ops->lib->
 637                         eeprom_ops.regulatory_bands[eep_band - 1];
 638         switch (eep_band) {
 639         case 1:         /* 2.4GHz band */
 640                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 641                 *eeprom_ch_info = (struct il_eeprom_channel *)
 642                                 il_eeprom_query_addr(il, offset);
 643                 *eeprom_ch_idx = il_eeprom_band_1;
 644                 break;
 645         case 2:         /* 4.9GHz band */
 646                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 647                 *eeprom_ch_info = (struct il_eeprom_channel *)
 648                                 il_eeprom_query_addr(il, offset);
 649                 *eeprom_ch_idx = il_eeprom_band_2;
 650                 break;
 651         case 3:         /* 5.2GHz band */
 652                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 653                 *eeprom_ch_info = (struct il_eeprom_channel *)
 654                                 il_eeprom_query_addr(il, offset);
 655                 *eeprom_ch_idx = il_eeprom_band_3;
 656                 break;
 657         case 4:         /* 5.5GHz band */
 658                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 659                 *eeprom_ch_info = (struct il_eeprom_channel *)
 660                                 il_eeprom_query_addr(il, offset);
 661                 *eeprom_ch_idx = il_eeprom_band_4;
 662                 break;
 663         case 5:         /* 5.7GHz band */
 664                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 665                 *eeprom_ch_info = (struct il_eeprom_channel *)
 666                                 il_eeprom_query_addr(il, offset);
 667                 *eeprom_ch_idx = il_eeprom_band_5;
 668                 break;
 669         case 6:         /* 2.4GHz ht40 channels */
 670                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 671                 *eeprom_ch_info = (struct il_eeprom_channel *)
 672                                 il_eeprom_query_addr(il, offset);
 673                 *eeprom_ch_idx = il_eeprom_band_6;
 674                 break;
 675         case 7:         /* 5 GHz ht40 channels */
 676                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 677                 *eeprom_ch_info = (struct il_eeprom_channel *)
 678                                 il_eeprom_query_addr(il, offset);
 679                 *eeprom_ch_idx = il_eeprom_band_7;
 680                 break;
 681         default:
 682                 BUG();
 683         }
 684 }
 685
 686 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 687                             ? # x " " : "")
 688 /**
 689  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 690  *
 691  * Does not set up a command, or touch hardware.
 692  */
 693 static int il_mod_ht40_chan_info(struct il_priv *il,
 694                               enum ieee80211_band band, u16 channel,
 695                               const struct il_eeprom_channel *eeprom_ch,
 696                               u8 clear_ht40_extension_channel)
 697 {
 698         struct il_channel_info *ch_info;
 699
 700         ch_info = (struct il_channel_info *)
 701                         il_get_channel_info(il, band, channel);
 702
 703         if (!il_is_channel_valid(ch_info))
 704                 return -1;
 705
 706         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 707                         " Ad-Hoc %ssupported\n",
 708                         ch_info->channel,
 709                         il_is_channel_a_band(ch_info) ?
 710                         "5.2" : "2.4",
 711                         CHECK_AND_PRINT(IBSS),
 712                         CHECK_AND_PRINT(ACTIVE),
 713                         CHECK_AND_PRINT(RADAR),
 714                         CHECK_AND_PRINT(WIDE),
 715                         CHECK_AND_PRINT(DFS),
 716                         eeprom_ch->flags,
 717                         eeprom_ch->max_power_avg,
 718                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 719                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 720                         "" : "not ");
 721
 722         ch_info->ht40_eeprom = *eeprom_ch;
 723         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 724         ch_info->ht40_flags = eeprom_ch->flags;
 725         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 726                 ch_info->ht40_extension_channel &=
 727                                         ~clear_ht40_extension_channel;
 728
 729         return 0;
 730 }
 731
 732 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 733                             ? # x " " : "")
 734
 735 /**
 736  * il_init_channel_map - Set up driver's info for all possible channels
 737  */
 738 int il_init_channel_map(struct il_priv *il)
 739 {
 740         int eeprom_ch_count = 0;
 741         const u8 *eeprom_ch_idx = NULL;
 742         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 743         int band, ch;
 744         struct il_channel_info *ch_info;
 745
 746         if (il->channel_count) {
 747                 D_EEPROM("Channel map already initialized.\n");
 748                 return 0;
 749         }
 750
 751         D_EEPROM("Initializing regulatory info from EEPROM\n");
 752
 753         il->channel_count =
 754             ARRAY_SIZE(il_eeprom_band_1) +
 755             ARRAY_SIZE(il_eeprom_band_2) +
 756             ARRAY_SIZE(il_eeprom_band_3) +
 757             ARRAY_SIZE(il_eeprom_band_4) +
 758             ARRAY_SIZE(il_eeprom_band_5);
 759
 760         D_EEPROM("Parsing data for %d channels.\n",
 761                         il->channel_count);
 762
 763         il->channel_info = kzalloc(sizeof(struct il_channel_info) *
 764                                      il->channel_count, GFP_KERNEL);
 765         if (!il->channel_info) {
 766                 IL_ERR("Could not allocate channel_info\n");
 767                 il->channel_count = 0;
 768                 return -ENOMEM;
 769         }
 770
 771         ch_info = il->channel_info;
 772
 773         /* Loop through the 5 EEPROM bands adding them in order to the
 774          * channel map we maintain (that contains additional information than
 775          * what just in the EEPROM) */
 776         for (band = 1; band <= 5; band++) {
 777
 778                 il_init_band_reference(il, band, &eeprom_ch_count,
 779                                         &eeprom_ch_info, &eeprom_ch_idx);
 780
 781                 /* Loop through each band adding each of the channels */
 782                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 783                         ch_info->channel = eeprom_ch_idx[ch];
 784                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
 785                             IEEE80211_BAND_5GHZ;
 786
 787                         /* permanently store EEPROM's channel regulatory flags
 788                          *   and max power in channel info database. */
 789                         ch_info->eeprom = eeprom_ch_info[ch];
 790
 791                         /* Copy the run-time flags so they are there even on
 792                          * invalid channels */
 793                         ch_info->flags = eeprom_ch_info[ch].flags;
 794                         /* First write that ht40 is not enabled, and then enable
 795                          * one by one */
 796                         ch_info->ht40_extension_channel =
 797                                         IEEE80211_CHAN_NO_HT40;
 798
 799                         if (!(il_is_channel_valid(ch_info))) {
 800                                 D_EEPROM(
 801                                                "Ch. %d Flags %x [%sGHz] - "
 802                                                "No traffic\n",
 803                                                ch_info->channel,
 804                                                ch_info->flags,
 805                                                il_is_channel_a_band(ch_info) ?
 806                                                "5.2" : "2.4");
 807                                 ch_info++;
 808                                 continue;
 809                         }
 810
 811                         /* Initialize regulatory-based run-time data */
 812                         ch_info->max_power_avg = ch_info->curr_txpow =
 813                             eeprom_ch_info[ch].max_power_avg;
 814                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 815                         ch_info->min_power = 0;
 816
 817                         D_EEPROM("Ch. %d [%sGHz] "
 818                                        "%s%s%s%s%s%s(0x%02x %ddBm):"
 819                                        " Ad-Hoc %ssupported\n",
 820                                        ch_info->channel,
 821                                        il_is_channel_a_band(ch_info) ?
 822                                        "5.2" : "2.4",
 823                                        CHECK_AND_PRINT_I(VALID),
 824                                        CHECK_AND_PRINT_I(IBSS),
 825                                        CHECK_AND_PRINT_I(ACTIVE),
 826                                        CHECK_AND_PRINT_I(RADAR),
 827                                        CHECK_AND_PRINT_I(WIDE),
 828                                        CHECK_AND_PRINT_I(DFS),
 829                                        eeprom_ch_info[ch].flags,
 830                                        eeprom_ch_info[ch].max_power_avg,
 831                                        ((eeprom_ch_info[ch].
 832                                          flags & EEPROM_CHANNEL_IBSS)
 833                                         && !(eeprom_ch_info[ch].
 834                                              flags & EEPROM_CHANNEL_RADAR))
 835                                        ? "" : "not ");
 836
 837                         ch_info++;
 838                 }
 839         }
 840
 841         /* Check if we do have HT40 channels */
 842         if (il->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
 843             EEPROM_REGULATORY_BAND_NO_HT40 &&
 844             il->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
 845             EEPROM_REGULATORY_BAND_NO_HT40)
 846                 return 0;
 847
 848         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
 849         for (band = 6; band <= 7; band++) {
 850                 enum ieee80211_band ieeeband;
 851
 852                 il_init_band_reference(il, band, &eeprom_ch_count,
 853                                         &eeprom_ch_info, &eeprom_ch_idx);
 854
 855                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 856                 ieeeband =
 857                         (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 858
 859                 /* Loop through each band adding each of the channels */
 860                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 861                         /* Set up driver's info for lower half */
 862                         il_mod_ht40_chan_info(il, ieeeband,
 863                                                 eeprom_ch_idx[ch],
 864                                                 &eeprom_ch_info[ch],
 865                                                 IEEE80211_CHAN_NO_HT40PLUS);
 866
 867                         /* Set up driver's info for upper half */
 868                         il_mod_ht40_chan_info(il, ieeeband,
 869                                                 eeprom_ch_idx[ch] + 4,
 870                                                 &eeprom_ch_info[ch],
 871                                                 IEEE80211_CHAN_NO_HT40MINUS);
 872                 }
 873         }
 874
 875         return 0;
 876 }
 877 EXPORT_SYMBOL(il_init_channel_map);
 878
 879 /*
 880  * il_free_channel_map - undo allocations in il_init_channel_map
 881  */
 882 void il_free_channel_map(struct il_priv *il)
 883 {
 884         kfree(il->channel_info);
 885         il->channel_count = 0;
 886 }
 887 EXPORT_SYMBOL(il_free_channel_map);
 888
 889 /**
 890  * il_get_channel_info - Find driver's ilate channel info
 891  *
 892  * Based on band and channel number.
 893  */
 894 const struct
 895 il_channel_info *il_get_channel_info(const struct il_priv *il,
 896                                         enum ieee80211_band band, u16 channel)
 897 {
 898         int i;
 899
 900         switch (band) {
 901         case IEEE80211_BAND_5GHZ:
 902                 for (i = 14; i < il->channel_count; i++) {
 903                         if (il->channel_info[i].channel == channel)
 904                                 return &il->channel_info[i];
 905                 }
 906                 break;
 907         case IEEE80211_BAND_2GHZ:
 908                 if (channel >= 1 && channel <= 14)
 909                         return &il->channel_info[channel - 1];
 910                 break;
 911         default:
 912                 BUG();
 913         }
 914
 915         return NULL;
 916 }
 917 EXPORT_SYMBOL(il_get_channel_info);
 918
 919 /*
 920  * Setting power level allows the card to go to sleep when not busy.
 921  *
 922  * We calculate a sleep command based on the required latency, which
 923  * we get from mac80211. In order to handle thermal throttling, we can
 924  * also use pre-defined power levels.
 925  */
 926
 927 /*
 928  * This defines the old power levels. They are still used by default
 929  * (level 1) and for thermal throttle (levels 3 through 5)
 930  */
 931
 932 struct il_power_vec_entry {
 933         struct il_powertable_cmd cmd;
 934         u8 no_dtim;     /* number of skip dtim */
 935 };
 936
 937 static void il_power_sleep_cam_cmd(struct il_priv *il,
 938                                     struct il_powertable_cmd *cmd)
 939 {
 940         memset(cmd, 0, sizeof(*cmd));
 941
 942         if (il->power_data.pci_pm)
 943                 cmd->flags |= IL_POWER_PCI_PM_MSK;
 944
 945         D_POWER("Sleep command for CAM\n");
 946 }
 947
 948 static int
 949 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
 950 {
 951         D_POWER("Sending power/sleep command\n");
 952         D_POWER("Flags value = 0x%08X\n", cmd->flags);
 953         D_POWER("Tx timeout = %u\n",
 954                                         le32_to_cpu(cmd->tx_data_timeout));
 955         D_POWER("Rx timeout = %u\n",
 956                                         le32_to_cpu(cmd->rx_data_timeout));
 957         D_POWER(
 958                         "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
 959                         le32_to_cpu(cmd->sleep_interval[0]),
 960                         le32_to_cpu(cmd->sleep_interval[1]),
 961                         le32_to_cpu(cmd->sleep_interval[2]),
 962                         le32_to_cpu(cmd->sleep_interval[3]),
 963                         le32_to_cpu(cmd->sleep_interval[4]));
 964
 965         return il_send_cmd_pdu(il, C_POWER_TBL,
 966                                 sizeof(struct il_powertable_cmd), cmd);
 967 }
 968
 969 int
 970 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd,
 971                        bool force)
 972 {
 973         int ret;
 974         bool update_chains;
 975
 976         lockdep_assert_held(&il->mutex);
 977
 978         /* Don't update the RX chain when chain noise calibration is running */
 979         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
 980                         il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
 981
 982         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
 983                 return 0;
 984
 985         if (!il_is_ready_rf(il))
 986                 return -EIO;
 987
 988         /* scan complete use sleep_power_next, need to be updated */
 989         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
 990         if (test_bit(S_SCANNING, &il->status) && !force) {
 991                 D_INFO("Defer power set mode while scanning\n");
 992                 return 0;
 993         }
 994
 995         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
 996                 set_bit(S_POWER_PMI, &il->status);
 997
 998         ret = il_set_power(il, cmd);
 999         if (!ret) {
1000                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1001                         clear_bit(S_POWER_PMI, &il->status);
1002
1003                 if (il->cfg->ops->lib->update_chain_flags && update_chains)
1004                         il->cfg->ops->lib->update_chain_flags(il);
1005                 else if (il->cfg->ops->lib->update_chain_flags)
1006                         D_POWER(
1007                                         "Cannot update the power, chain noise "
1008                                         "calibration running: %d\n",
1009                                         il->chain_noise_data.state);
1010
1011                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1012         } else
1013                 IL_ERR("set power fail, ret = %d", ret);
1014
1015         return ret;
1016 }
1017
1018 int il_power_update_mode(struct il_priv *il, bool force)
1019 {
1020         struct il_powertable_cmd cmd;
1021
1022         il_power_sleep_cam_cmd(il, &cmd);
1023         return il_power_set_mode(il, &cmd, force);
1024 }
1025 EXPORT_SYMBOL(il_power_update_mode);
1026
1027 /* initialize to default */
1028 void il_power_initialize(struct il_priv *il)
1029 {
1030         u16 lctl = il_pcie_link_ctl(il);
1031
1032         il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
1033
1034         il->power_data.debug_sleep_level_override = -1;
1035
1036         memset(&il->power_data.sleep_cmd, 0,
1037                 sizeof(il->power_data.sleep_cmd));
1038 }
1039 EXPORT_SYMBOL(il_power_initialize);
1040
1041 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1042  * sending probe req.  This should be set long enough to hear probe responses
1043  * from more than one AP.  */
1044 #define IL_ACTIVE_DWELL_TIME_24    (30)       /* all times in msec */
1045 #define IL_ACTIVE_DWELL_TIME_52    (20)
1046
1047 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1048 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1049
1050 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1051  * Must be set longer than active dwell time.
1052  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1053 #define IL_PASSIVE_DWELL_TIME_24   (20)       /* all times in msec */
1054 #define IL_PASSIVE_DWELL_TIME_52   (10)
1055 #define IL_PASSIVE_DWELL_BASE      (100)
1056 #define IL_CHANNEL_TUNE_TIME       5
1057
1058 static int il_send_scan_abort(struct il_priv *il)
1059 {
1060         int ret;
1061         struct il_rx_pkt *pkt;
1062         struct il_host_cmd cmd = {
1063                 .id = C_SCAN_ABORT,
1064                 .flags = CMD_WANT_SKB,
1065         };
1066
1067         /* Exit instantly with error when device is not ready
1068          * to receive scan abort command or it does not perform
1069          * hardware scan currently */
1070         if (!test_bit(S_READY, &il->status) ||
1071             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1072             !test_bit(S_SCAN_HW, &il->status) ||
1073             test_bit(S_FW_ERROR, &il->status) ||
1074             test_bit(S_EXIT_PENDING, &il->status))
1075                 return -EIO;
1076
1077         ret = il_send_cmd_sync(il, &cmd);
1078         if (ret)
1079                 return ret;
1080
1081         pkt = (struct il_rx_pkt *)cmd.reply_page;
1082         if (pkt->u.status != CAN_ABORT_STATUS) {
1083                 /* The scan abort will return 1 for success or
1084                  * 2 for "failure".  A failure condition can be
1085                  * due to simply not being in an active scan which
1086                  * can occur if we send the scan abort before we
1087                  * the microcode has notified us that a scan is
1088                  * completed. */
1089                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1090                 ret = -EIO;
1091         }
1092
1093         il_free_pages(il, cmd.reply_page);
1094         return ret;
1095 }
1096
1097 static void il_complete_scan(struct il_priv *il, bool aborted)
1098 {
1099         /* check if scan was requested from mac80211 */
1100         if (il->scan_request) {
1101                 D_SCAN("Complete scan in mac80211\n");
1102                 ieee80211_scan_completed(il->hw, aborted);
1103         }
1104
1105         il->scan_vif = NULL;
1106         il->scan_request = NULL;
1107 }
1108
1109 void il_force_scan_end(struct il_priv *il)
1110 {
1111         lockdep_assert_held(&il->mutex);
1112
1113         if (!test_bit(S_SCANNING, &il->status)) {
1114                 D_SCAN("Forcing scan end while not scanning\n");
1115                 return;
1116         }
1117
1118         D_SCAN("Forcing scan end\n");
1119         clear_bit(S_SCANNING, &il->status);
1120         clear_bit(S_SCAN_HW, &il->status);
1121         clear_bit(S_SCAN_ABORTING, &il->status);
1122         il_complete_scan(il, true);
1123 }
1124
1125 static void il_do_scan_abort(struct il_priv *il)
1126 {
1127         int ret;
1128
1129         lockdep_assert_held(&il->mutex);
1130
1131         if (!test_bit(S_SCANNING, &il->status)) {
1132                 D_SCAN("Not performing scan to abort\n");
1133                 return;
1134         }
1135
1136         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1137                 D_SCAN("Scan abort in progress\n");
1138                 return;
1139         }
1140
1141         ret = il_send_scan_abort(il);
1142         if (ret) {
1143                 D_SCAN("Send scan abort failed %d\n", ret);
1144                 il_force_scan_end(il);
1145         } else
1146                 D_SCAN("Successfully send scan abort\n");
1147 }
1148
1149 /**
1150  * il_scan_cancel - Cancel any currently executing HW scan
1151  */
1152 int il_scan_cancel(struct il_priv *il)
1153 {
1154         D_SCAN("Queuing abort scan\n");
1155         queue_work(il->workqueue, &il->abort_scan);
1156         return 0;
1157 }
1158 EXPORT_SYMBOL(il_scan_cancel);
1159
1160 /**
1161  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1162  * @ms: amount of time to wait (in milliseconds) for scan to abort
1163  *
1164  */
1165 int il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1166 {
1167         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1168
1169         lockdep_assert_held(&il->mutex);
1170
1171         D_SCAN("Scan cancel timeout\n");
1172
1173         il_do_scan_abort(il);
1174
1175         while (time_before_eq(jiffies, timeout)) {
1176                 if (!test_bit(S_SCAN_HW, &il->status))
1177                         break;
1178                 msleep(20);
1179         }
1180
1181         return test_bit(S_SCAN_HW, &il->status);
1182 }
1183 EXPORT_SYMBOL(il_scan_cancel_timeout);
1184
1185 /* Service response to C_SCAN (0x80) */
1186 static void il_hdl_scan(struct il_priv *il,
1187                               struct il_rx_buf *rxb)
1188 {
1189 #ifdef CONFIG_IWLEGACY_DEBUG
1190         struct il_rx_pkt *pkt = rxb_addr(rxb);
1191         struct il_scanreq_notification *notif =
1192             (struct il_scanreq_notification *)pkt->u.raw;
1193
1194         D_SCAN("Scan request status = 0x%x\n", notif->status);
1195 #endif
1196 }
1197
1198 /* Service N_SCAN_START (0x82) */
1199 static void il_hdl_scan_start(struct il_priv *il,
1200                                     struct il_rx_buf *rxb)
1201 {
1202         struct il_rx_pkt *pkt = rxb_addr(rxb);
1203         struct il_scanstart_notification *notif =
1204             (struct il_scanstart_notification *)pkt->u.raw;
1205         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1206         D_SCAN("Scan start: "
1207                        "%d [802.11%s] "
1208                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
1209                        notif->channel,
1210                        notif->band ? "bg" : "a",
1211                        le32_to_cpu(notif->tsf_high),
1212                        le32_to_cpu(notif->tsf_low),
1213                        notif->status, notif->beacon_timer);
1214 }
1215
1216 /* Service N_SCAN_RESULTS (0x83) */
1217 static void il_hdl_scan_results(struct il_priv *il,
1218                                       struct il_rx_buf *rxb)
1219 {
1220 #ifdef CONFIG_IWLEGACY_DEBUG
1221         struct il_rx_pkt *pkt = rxb_addr(rxb);
1222         struct il_scanresults_notification *notif =
1223             (struct il_scanresults_notification *)pkt->u.raw;
1224
1225         D_SCAN("Scan ch.res: "
1226                        "%d [802.11%s] "
1227                        "(TSF: 0x%08X:%08X) - %d "
1228                        "elapsed=%lu usec\n",
1229                        notif->channel,
1230                        notif->band ? "bg" : "a",
1231                        le32_to_cpu(notif->tsf_high),
1232                        le32_to_cpu(notif->tsf_low),
1233                        le32_to_cpu(notif->stats[0]),
1234                        le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1235 #endif
1236 }
1237
1238 /* Service N_SCAN_COMPLETE (0x84) */
1239 static void il_hdl_scan_complete(struct il_priv *il,
1240                                        struct il_rx_buf *rxb)
1241 {
1242
1243 #ifdef CONFIG_IWLEGACY_DEBUG
1244         struct il_rx_pkt *pkt = rxb_addr(rxb);
1245         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1246 #endif
1247
1248         D_SCAN(
1249                         "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1250                        scan_notif->scanned_channels,
1251                        scan_notif->tsf_low,
1252                        scan_notif->tsf_high, scan_notif->status);
1253
1254         /* The HW is no longer scanning */
1255         clear_bit(S_SCAN_HW, &il->status);
1256
1257         D_SCAN("Scan on %sGHz took %dms\n",
1258                        (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1259                        jiffies_to_msecs(jiffies - il->scan_start));
1260
1261         queue_work(il->workqueue, &il->scan_completed);
1262 }
1263
1264 void il_setup_rx_scan_handlers(struct il_priv *il)
1265 {
1266         /* scan handlers */
1267         il->handlers[C_SCAN] = il_hdl_scan;
1268         il->handlers[N_SCAN_START] =
1269                                         il_hdl_scan_start;
1270         il->handlers[N_SCAN_RESULTS] =
1271                                         il_hdl_scan_results;
1272         il->handlers[N_SCAN_COMPLETE] =
1273                                         il_hdl_scan_complete;
1274 }
1275 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1276
1277 inline u16 il_get_active_dwell_time(struct il_priv *il,
1278                                      enum ieee80211_band band,
1279                                      u8 n_probes)
1280 {
1281         if (band == IEEE80211_BAND_5GHZ)
1282                 return IL_ACTIVE_DWELL_TIME_52 +
1283                         IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1284         else
1285                 return IL_ACTIVE_DWELL_TIME_24 +
1286                         IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1287 }
1288 EXPORT_SYMBOL(il_get_active_dwell_time);
1289
1290 u16 il_get_passive_dwell_time(struct il_priv *il,
1291                                enum ieee80211_band band,
1292                                struct ieee80211_vif *vif)
1293 {
1294         struct il_rxon_context *ctx = &il->ctx;
1295         u16 value;
1296
1297         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
1298             IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_24 :
1299             IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_52;
1300
1301         if (il_is_any_associated(il)) {
1302                 /*
1303                  * If we're associated, we clamp the maximum passive
1304                  * dwell time to be 98% of the smallest beacon interval
1305                  * (minus 2 * channel tune time)
1306                  */
1307                 value = ctx->vif ? ctx->vif->bss_conf.beacon_int : 0;
1308                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1309                         value = IL_PASSIVE_DWELL_BASE;
1310                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1311                 passive = min(value, passive);
1312         }
1313
1314         return passive;
1315 }
1316 EXPORT_SYMBOL(il_get_passive_dwell_time);
1317
1318 void il_init_scan_params(struct il_priv *il)
1319 {
1320         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1321         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1322                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1323         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1324                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1325 }
1326 EXPORT_SYMBOL(il_init_scan_params);
1327
1328 static int il_scan_initiate(struct il_priv *il,
1329                                     struct ieee80211_vif *vif)
1330 {
1331         int ret;
1332
1333         lockdep_assert_held(&il->mutex);
1334
1335         if (WARN_ON(!il->cfg->ops->utils->request_scan))
1336                 return -EOPNOTSUPP;
1337
1338         cancel_delayed_work(&il->scan_check);
1339
1340         if (!il_is_ready_rf(il)) {
1341                 IL_WARN("Request scan called when driver not ready.\n");
1342                 return -EIO;
1343         }
1344
1345         if (test_bit(S_SCAN_HW, &il->status)) {
1346                 D_SCAN(
1347                         "Multiple concurrent scan requests in parallel.\n");
1348                 return -EBUSY;
1349         }
1350
1351         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1352                 D_SCAN("Scan request while abort pending.\n");
1353                 return -EBUSY;
1354         }
1355
1356         D_SCAN("Starting scan...\n");
1357
1358         set_bit(S_SCANNING, &il->status);
1359         il->scan_start = jiffies;
1360
1361         ret = il->cfg->ops->utils->request_scan(il, vif);
1362         if (ret) {
1363                 clear_bit(S_SCANNING, &il->status);
1364                 return ret;
1365         }
1366
1367         queue_delayed_work(il->workqueue, &il->scan_check,
1368                            IL_SCAN_CHECK_WATCHDOG);
1369
1370         return 0;
1371 }
1372
1373 int il_mac_hw_scan(struct ieee80211_hw *hw,
1374                     struct ieee80211_vif *vif,
1375                     struct cfg80211_scan_request *req)
1376 {
1377         struct il_priv *il = hw->priv;
1378         int ret;
1379
1380         D_MAC80211("enter\n");
1381
1382         if (req->n_channels == 0)
1383                 return -EINVAL;
1384
1385         mutex_lock(&il->mutex);
1386
1387         if (test_bit(S_SCANNING, &il->status)) {
1388                 D_SCAN("Scan already in progress.\n");
1389                 ret = -EAGAIN;
1390                 goto out_unlock;
1391         }
1392
1393         /* mac80211 will only ask for one band at a time */
1394         il->scan_request = req;
1395         il->scan_vif = vif;
1396         il->scan_band = req->channels[0]->band;
1397
1398         ret = il_scan_initiate(il, vif);
1399
1400         D_MAC80211("leave\n");
1401
1402 out_unlock:
1403         mutex_unlock(&il->mutex);
1404
1405         return ret;
1406 }
1407 EXPORT_SYMBOL(il_mac_hw_scan);
1408
1409 static void il_bg_scan_check(struct work_struct *data)
1410 {
1411         struct il_priv *il =
1412             container_of(data, struct il_priv, scan_check.work);
1413
1414         D_SCAN("Scan check work\n");
1415
1416         /* Since we are here firmware does not finish scan and
1417          * most likely is in bad shape, so we don't bother to
1418          * send abort command, just force scan complete to mac80211 */
1419         mutex_lock(&il->mutex);
1420         il_force_scan_end(il);
1421         mutex_unlock(&il->mutex);
1422 }
1423
1424 /**
1425  * il_fill_probe_req - fill in all required fields and IE for probe request
1426  */
1427
1428 u16
1429 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1430                        const u8 *ta, const u8 *ies, int ie_len, int left)
1431 {
1432         int len = 0;
1433         u8 *pos = NULL;
1434
1435         /* Make sure there is enough space for the probe request,
1436          * two mandatory IEs and the data */
1437         left -= 24;
1438         if (left < 0)
1439                 return 0;
1440
1441         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1442         memcpy(frame->da, il_bcast_addr, ETH_ALEN);
1443         memcpy(frame->sa, ta, ETH_ALEN);
1444         memcpy(frame->bssid, il_bcast_addr, ETH_ALEN);
1445         frame->seq_ctrl = 0;
1446
1447         len += 24;
1448
1449         /* ...next IE... */
1450         pos = &frame->u.probe_req.variable[0];
1451
1452         /* fill in our indirect SSID IE */
1453         left -= 2;
1454         if (left < 0)
1455                 return 0;
1456         *pos++ = WLAN_EID_SSID;
1457         *pos++ = 0;
1458
1459         len += 2;
1460
1461         if (WARN_ON(left < ie_len))
1462                 return len;
1463
1464         if (ies && ie_len) {
1465                 memcpy(pos, ies, ie_len);
1466                 len += ie_len;
1467         }
1468
1469         return (u16)len;
1470 }
1471 EXPORT_SYMBOL(il_fill_probe_req);
1472
1473 static void il_bg_abort_scan(struct work_struct *work)
1474 {
1475         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1476
1477         D_SCAN("Abort scan work\n");
1478
1479         /* We keep scan_check work queued in case when firmware will not
1480          * report back scan completed notification */
1481         mutex_lock(&il->mutex);
1482         il_scan_cancel_timeout(il, 200);
1483         mutex_unlock(&il->mutex);
1484 }
1485
1486 static void il_bg_scan_completed(struct work_struct *work)
1487 {
1488         struct il_priv *il =
1489             container_of(work, struct il_priv, scan_completed);
1490         bool aborted;
1491
1492         D_SCAN("Completed scan.\n");
1493
1494         cancel_delayed_work(&il->scan_check);
1495
1496         mutex_lock(&il->mutex);
1497
1498         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1499         if (aborted)
1500                 D_SCAN("Aborted scan completed.\n");
1501
1502         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1503                 D_SCAN("Scan already completed.\n");
1504                 goto out_settings;
1505         }
1506
1507         il_complete_scan(il, aborted);
1508
1509 out_settings:
1510         /* Can we still talk to firmware ? */
1511         if (!il_is_ready_rf(il))
1512                 goto out;
1513
1514         /*
1515          * We do not commit power settings while scan is pending,
1516          * do it now if the settings changed.
1517          */
1518         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1519         il_set_tx_power(il, il->tx_power_next, false);
1520
1521         il->cfg->ops->utils->post_scan(il);
1522
1523 out:
1524         mutex_unlock(&il->mutex);
1525 }
1526
1527 void il_setup_scan_deferred_work(struct il_priv *il)
1528 {
1529         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1530         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1531         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1532 }
1533 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1534
1535 void il_cancel_scan_deferred_work(struct il_priv *il)
1536 {
1537         cancel_work_sync(&il->abort_scan);
1538         cancel_work_sync(&il->scan_completed);
1539
1540         if (cancel_delayed_work_sync(&il->scan_check)) {
1541                 mutex_lock(&il->mutex);
1542                 il_force_scan_end(il);
1543                 mutex_unlock(&il->mutex);
1544         }
1545 }
1546 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1547
1548 /* il->sta_lock must be held */
1549 static void il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1550 {
1551
1552         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1553                 IL_ERR(
1554                         "ACTIVATE a non DRIVER active station id %u addr %pM\n",
1555                         sta_id, il->stations[sta_id].sta.sta.addr);
1556
1557         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1558                 D_ASSOC(
1559                         "STA id %u addr %pM already present"
1560                         " in uCode (according to driver)\n",
1561                         sta_id, il->stations[sta_id].sta.sta.addr);
1562         } else {
1563                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1564                 D_ASSOC("Added STA id %u addr %pM to uCode\n",
1565                                 sta_id, il->stations[sta_id].sta.sta.addr);
1566         }
1567 }
1568
1569 static int il_process_add_sta_resp(struct il_priv *il,
1570                                     struct il_addsta_cmd *addsta,
1571                                     struct il_rx_pkt *pkt,
1572                                     bool sync)
1573 {
1574         u8 sta_id = addsta->sta.sta_id;
1575         unsigned long flags;
1576         int ret = -EIO;
1577
1578         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1579                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n",
1580                         pkt->hdr.flags);
1581                 return ret;
1582         }
1583
1584         D_INFO("Processing response for adding station %u\n",
1585                        sta_id);
1586
1587         spin_lock_irqsave(&il->sta_lock, flags);
1588
1589         switch (pkt->u.add_sta.status) {
1590         case ADD_STA_SUCCESS_MSK:
1591                 D_INFO("C_ADD_STA PASSED\n");
1592                 il_sta_ucode_activate(il, sta_id);
1593                 ret = 0;
1594                 break;
1595         case ADD_STA_NO_ROOM_IN_TBL:
1596                 IL_ERR("Adding station %d failed, no room in table.\n",
1597                         sta_id);
1598                 break;
1599         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1600                 IL_ERR(
1601                         "Adding station %d failed, no block ack resource.\n",
1602                         sta_id);
1603                 break;
1604         case ADD_STA_MODIFY_NON_EXIST_STA:
1605                 IL_ERR("Attempting to modify non-existing station %d\n",
1606                         sta_id);
1607                 break;
1608         default:
1609                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n",
1610                                 pkt->u.add_sta.status);
1611                 break;
1612         }
1613
1614         D_INFO("%s station id %u addr %pM\n",
1615                        il->stations[sta_id].sta.mode ==
1616                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
1617                        sta_id, il->stations[sta_id].sta.sta.addr);
1618
1619         /*
1620          * XXX: The MAC address in the command buffer is often changed from
1621          * the original sent to the device. That is, the MAC address
1622          * written to the command buffer often is not the same MAC address
1623          * read from the command buffer when the command returns. This
1624          * issue has not yet been resolved and this debugging is left to
1625          * observe the problem.
1626          */
1627         D_INFO("%s station according to cmd buffer %pM\n",
1628                        il->stations[sta_id].sta.mode ==
1629                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
1630                        addsta->sta.addr);
1631         spin_unlock_irqrestore(&il->sta_lock, flags);
1632
1633         return ret;
1634 }
1635
1636 static void il_add_sta_callback(struct il_priv *il,
1637                                  struct il_device_cmd *cmd,
1638                                  struct il_rx_pkt *pkt)
1639 {
1640         struct il_addsta_cmd *addsta =
1641                 (struct il_addsta_cmd *)cmd->cmd.payload;
1642
1643         il_process_add_sta_resp(il, addsta, pkt, false);
1644
1645 }
1646
1647 int il_send_add_sta(struct il_priv *il,
1648                      struct il_addsta_cmd *sta, u8 flags)
1649 {
1650         struct il_rx_pkt *pkt = NULL;
1651         int ret = 0;
1652         u8 data[sizeof(*sta)];
1653         struct il_host_cmd cmd = {
1654                 .id = C_ADD_STA,
1655                 .flags = flags,
1656                 .data = data,
1657         };
1658         u8 sta_id __maybe_unused = sta->sta.sta_id;
1659
1660         D_INFO("Adding sta %u (%pM) %ssynchronously\n",
1661                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
1662
1663         if (flags & CMD_ASYNC)
1664                 cmd.callback = il_add_sta_callback;
1665         else {
1666                 cmd.flags |= CMD_WANT_SKB;
1667                 might_sleep();
1668         }
1669
1670         cmd.len = il->cfg->ops->utils->build_addsta_hcmd(sta, data);
1671         ret = il_send_cmd(il, &cmd);
1672
1673         if (ret || (flags & CMD_ASYNC))
1674                 return ret;
1675
1676         if (ret == 0) {
1677                 pkt = (struct il_rx_pkt *)cmd.reply_page;
1678                 ret = il_process_add_sta_resp(il, sta, pkt, true);
1679         }
1680         il_free_pages(il, cmd.reply_page);
1681
1682         return ret;
1683 }
1684 EXPORT_SYMBOL(il_send_add_sta);
1685
1686 static void il_set_ht_add_station(struct il_priv *il, u8 idx,
1687                                    struct ieee80211_sta *sta,
1688                                    struct il_rxon_context *ctx)
1689 {
1690         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1691         __le32 sta_flags;
1692         u8 mimo_ps_mode;
1693
1694         if (!sta || !sta_ht_inf->ht_supported)
1695                 goto done;
1696
1697         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
1698         D_ASSOC("spatial multiplexing power save mode: %s\n",
1699                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
1700                         "static" :
1701                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
1702                         "dynamic" : "disabled");
1703
1704         sta_flags = il->stations[idx].sta.station_flags;
1705
1706         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1707
1708         switch (mimo_ps_mode) {
1709         case WLAN_HT_CAP_SM_PS_STATIC:
1710                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1711                 break;
1712         case WLAN_HT_CAP_SM_PS_DYNAMIC:
1713                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1714                 break;
1715         case WLAN_HT_CAP_SM_PS_DISABLED:
1716                 break;
1717         default:
1718                 IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode);
1719                 break;
1720         }
1721
1722         sta_flags |= cpu_to_le32(
1723               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1724
1725         sta_flags |= cpu_to_le32(
1726               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1727
1728         if (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap))
1729                 sta_flags |= STA_FLG_HT40_EN_MSK;
1730         else
1731                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1732
1733         il->stations[idx].sta.station_flags = sta_flags;
1734  done:
1735         return;
1736 }
1737
1738 /**
1739  * il_prep_station - Prepare station information for addition
1740  *
1741  * should be called with sta_lock held
1742  */
1743 u8 il_prep_station(struct il_priv *il, struct il_rxon_context *ctx,
1744                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
1745 {
1746         struct il_station_entry *station;
1747         int i;
1748         u8 sta_id = IL_INVALID_STATION;
1749         u16 rate;
1750
1751         if (is_ap)
1752                 sta_id = ctx->ap_sta_id;
1753         else if (is_broadcast_ether_addr(addr))
1754                 sta_id = ctx->bcast_sta_id;
1755         else
1756                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1757                         if (!compare_ether_addr(il->stations[i].sta.sta.addr,
1758                                                 addr)) {
1759                                 sta_id = i;
1760                                 break;
1761                         }
1762
1763                         if (!il->stations[i].used &&
1764                             sta_id == IL_INVALID_STATION)
1765                                 sta_id = i;
1766                 }
1767
1768         /*
1769          * These two conditions have the same outcome, but keep them
1770          * separate
1771          */
1772         if (unlikely(sta_id == IL_INVALID_STATION))
1773                 return sta_id;
1774
1775         /*
1776          * uCode is not able to deal with multiple requests to add a
1777          * station. Keep track if one is in progress so that we do not send
1778          * another.
1779          */
1780         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1781                 D_INFO(
1782                                 "STA %d already in process of being added.\n",
1783                                 sta_id);
1784                 return sta_id;
1785         }
1786
1787         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1788             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1789             !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) {
1790                 D_ASSOC(
1791                                 "STA %d (%pM) already added, not adding again.\n",
1792                                 sta_id, addr);
1793                 return sta_id;
1794         }
1795
1796         station = &il->stations[sta_id];
1797         station->used = IL_STA_DRIVER_ACTIVE;
1798         D_ASSOC("Add STA to driver ID %d: %pM\n",
1799                         sta_id, addr);
1800         il->num_stations++;
1801
1802         /* Set up the C_ADD_STA command to send to device */
1803         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1804         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1805         station->sta.mode = 0;
1806         station->sta.sta.sta_id = sta_id;
1807         station->sta.station_flags = ctx->station_flags;
1808         station->ctxid = ctx->ctxid;
1809
1810         if (sta) {
1811                 struct il_station_priv_common *sta_priv;
1812
1813                 sta_priv = (void *)sta->drv_priv;
1814                 sta_priv->ctx = ctx;
1815         }
1816
1817         /*
1818          * OK to call unconditionally, since local stations (IBSS BSSID
1819          * STA and broadcast STA) pass in a NULL sta, and mac80211
1820          * doesn't allow HT IBSS.
1821          */
1822         il_set_ht_add_station(il, sta_id, sta, ctx);
1823
1824         /* 3945 only */
1825         rate = (il->band == IEEE80211_BAND_5GHZ) ?
1826                 RATE_6M_PLCP : RATE_1M_PLCP;
1827         /* Turn on both antennas for the station... */
1828         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1829
1830         return sta_id;
1831
1832 }
1833 EXPORT_SYMBOL_GPL(il_prep_station);
1834
1835 #define STA_WAIT_TIMEOUT (HZ/2)
1836
1837 /**
1838  * il_add_station_common -
1839  */
1840 int
1841 il_add_station_common(struct il_priv *il,
1842                         struct il_rxon_context *ctx,
1843                            const u8 *addr, bool is_ap,
1844                            struct ieee80211_sta *sta, u8 *sta_id_r)
1845 {
1846         unsigned long flags_spin;
1847         int ret = 0;
1848         u8 sta_id;
1849         struct il_addsta_cmd sta_cmd;
1850
1851         *sta_id_r = 0;
1852         spin_lock_irqsave(&il->sta_lock, flags_spin);
1853         sta_id = il_prep_station(il, ctx, addr, is_ap, sta);
1854         if (sta_id == IL_INVALID_STATION) {
1855                 IL_ERR("Unable to prepare station %pM for addition\n",
1856                         addr);
1857                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1858                 return -EINVAL;
1859         }
1860
1861         /*
1862          * uCode is not able to deal with multiple requests to add a
1863          * station. Keep track if one is in progress so that we do not send
1864          * another.
1865          */
1866         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1867                 D_INFO(
1868                         "STA %d already in process of being added.\n",
1869                        sta_id);
1870                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1871                 return -EEXIST;
1872         }
1873
1874         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1875             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
1876                 D_ASSOC(
1877                         "STA %d (%pM) already added, not adding again.\n",
1878                         sta_id, addr);
1879                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1880                 return -EEXIST;
1881         }
1882
1883         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
1884         memcpy(&sta_cmd, &il->stations[sta_id].sta,
1885                                 sizeof(struct il_addsta_cmd));
1886         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1887
1888         /* Add station to device's station table */
1889         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
1890         if (ret) {
1891                 spin_lock_irqsave(&il->sta_lock, flags_spin);
1892                 IL_ERR("Adding station %pM failed.\n",
1893                         il->stations[sta_id].sta.sta.addr);
1894                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
1895                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
1896                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1897         }
1898         *sta_id_r = sta_id;
1899         return ret;
1900 }
1901 EXPORT_SYMBOL(il_add_station_common);
1902
1903 /**
1904  * il_sta_ucode_deactivate - deactivate ucode status for a station
1905  *
1906  * il->sta_lock must be held
1907  */
1908 static void il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
1909 {
1910         /* Ucode must be active and driver must be non active */
1911         if ((il->stations[sta_id].used &
1912              (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
1913                                                 IL_STA_UCODE_ACTIVE)
1914                 IL_ERR("removed non active STA %u\n", sta_id);
1915
1916         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
1917
1918         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
1919         D_ASSOC("Removed STA %u\n", sta_id);
1920 }
1921
1922 static int il_send_remove_station(struct il_priv *il,
1923                                    const u8 *addr, int sta_id,
1924                                    bool temporary)
1925 {
1926         struct il_rx_pkt *pkt;
1927         int ret;
1928
1929         unsigned long flags_spin;
1930         struct il_rem_sta_cmd rm_sta_cmd;
1931
1932         struct il_host_cmd cmd = {
1933                 .id = C_REM_STA,
1934                 .len = sizeof(struct il_rem_sta_cmd),
1935                 .flags = CMD_SYNC,
1936                 .data = &rm_sta_cmd,
1937         };
1938
1939         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
1940         rm_sta_cmd.num_sta = 1;
1941         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
1942
1943         cmd.flags |= CMD_WANT_SKB;
1944
1945         ret = il_send_cmd(il, &cmd);
1946
1947         if (ret)
1948                 return ret;
1949
1950         pkt = (struct il_rx_pkt *)cmd.reply_page;
1951         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1952                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n",
1953                           pkt->hdr.flags);
1954                 ret = -EIO;
1955         }
1956
1957         if (!ret) {
1958                 switch (pkt->u.rem_sta.status) {
1959                 case REM_STA_SUCCESS_MSK:
1960                         if (!temporary) {
1961                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
1962                                 il_sta_ucode_deactivate(il, sta_id);
1963                                 spin_unlock_irqrestore(&il->sta_lock,
1964                                                                 flags_spin);
1965                         }
1966                         D_ASSOC("C_REM_STA PASSED\n");
1967                         break;
1968                 default:
1969                         ret = -EIO;
1970                         IL_ERR("C_REM_STA failed\n");
1971                         break;
1972                 }
1973         }
1974         il_free_pages(il, cmd.reply_page);
1975
1976         return ret;
1977 }
1978
1979 /**
1980  * il_remove_station - Remove driver's knowledge of station.
1981  */
1982 int il_remove_station(struct il_priv *il, const u8 sta_id,
1983                        const u8 *addr)
1984 {
1985         unsigned long flags;
1986
1987         if (!il_is_ready(il)) {
1988                 D_INFO(
1989                         "Unable to remove station %pM, device not ready.\n",
1990                         addr);
1991                 /*
1992                  * It is typical for stations to be removed when we are
1993                  * going down. Return success since device will be down
1994                  * soon anyway
1995                  */
1996                 return 0;
1997         }
1998
1999         D_ASSOC("Removing STA from driver:%d  %pM\n",
2000                         sta_id, addr);
2001
2002         if (WARN_ON(sta_id == IL_INVALID_STATION))
2003                 return -EINVAL;
2004
2005         spin_lock_irqsave(&il->sta_lock, flags);
2006
2007         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2008                 D_INFO("Removing %pM but non DRIVER active\n",
2009                                 addr);
2010                 goto out_err;
2011         }
2012
2013         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2014                 D_INFO("Removing %pM but non UCODE active\n",
2015                                 addr);
2016                 goto out_err;
2017         }
2018
2019         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2020                 kfree(il->stations[sta_id].lq);
2021                 il->stations[sta_id].lq = NULL;
2022         }
2023
2024         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2025
2026         il->num_stations--;
2027
2028         BUG_ON(il->num_stations < 0);
2029
2030         spin_unlock_irqrestore(&il->sta_lock, flags);
2031
2032         return il_send_remove_station(il, addr, sta_id, false);
2033 out_err:
2034         spin_unlock_irqrestore(&il->sta_lock, flags);
2035         return -EINVAL;
2036 }
2037 EXPORT_SYMBOL_GPL(il_remove_station);
2038
2039 /**
2040  * il_clear_ucode_stations - clear ucode station table bits
2041  *
2042  * This function clears all the bits in the driver indicating
2043  * which stations are active in the ucode. Call when something
2044  * other than explicit station management would cause this in
2045  * the ucode, e.g. unassociated RXON.
2046  */
2047 void il_clear_ucode_stations(struct il_priv *il,
2048                               struct il_rxon_context *ctx)
2049 {
2050         int i;
2051         unsigned long flags_spin;
2052         bool cleared = false;
2053
2054         D_INFO("Clearing ucode stations in driver\n");
2055
2056         spin_lock_irqsave(&il->sta_lock, flags_spin);
2057         for (i = 0; i < il->hw_params.max_stations; i++) {
2058                 if (ctx && ctx->ctxid != il->stations[i].ctxid)
2059                         continue;
2060
2061                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2062                         D_INFO(
2063                                 "Clearing ucode active for station %d\n", i);
2064                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2065                         cleared = true;
2066                 }
2067         }
2068         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2069
2070         if (!cleared)
2071                 D_INFO(
2072                         "No active stations found to be cleared\n");
2073 }
2074 EXPORT_SYMBOL(il_clear_ucode_stations);
2075
2076 /**
2077  * il_restore_stations() - Restore driver known stations to device
2078  *
2079  * All stations considered active by driver, but not present in ucode, is
2080  * restored.
2081  *
2082  * Function sleeps.
2083  */
2084 void
2085 il_restore_stations(struct il_priv *il, struct il_rxon_context *ctx)
2086 {
2087         struct il_addsta_cmd sta_cmd;
2088         struct il_link_quality_cmd lq;
2089         unsigned long flags_spin;
2090         int i;
2091         bool found = false;
2092         int ret;
2093         bool send_lq;
2094
2095         if (!il_is_ready(il)) {
2096                 D_INFO(
2097                         "Not ready yet, not restoring any stations.\n");
2098                 return;
2099         }
2100
2101         D_ASSOC("Restoring all known stations ... start.\n");
2102         spin_lock_irqsave(&il->sta_lock, flags_spin);
2103         for (i = 0; i < il->hw_params.max_stations; i++) {
2104                 if (ctx->ctxid != il->stations[i].ctxid)
2105                         continue;
2106                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2107                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2108                         D_ASSOC("Restoring sta %pM\n",
2109                                         il->stations[i].sta.sta.addr);
2110                         il->stations[i].sta.mode = 0;
2111                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2112                         found = true;
2113                 }
2114         }
2115
2116         for (i = 0; i < il->hw_params.max_stations; i++) {
2117                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2118                         memcpy(&sta_cmd, &il->stations[i].sta,
2119                                sizeof(struct il_addsta_cmd));
2120                         send_lq = false;
2121                         if (il->stations[i].lq) {
2122                                 memcpy(&lq, il->stations[i].lq,
2123                                        sizeof(struct il_link_quality_cmd));
2124                                 send_lq = true;
2125                         }
2126                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2127                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2128                         if (ret) {
2129                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2130                                 IL_ERR("Adding station %pM failed.\n",
2131                                         il->stations[i].sta.sta.addr);
2132                                 il->stations[i].used &=
2133                                                 ~IL_STA_DRIVER_ACTIVE;
2134                                 il->stations[i].used &=
2135                                                 ~IL_STA_UCODE_INPROGRESS;
2136                                 spin_unlock_irqrestore(&il->sta_lock,
2137                                                                 flags_spin);
2138                         }
2139                         /*
2140                          * Rate scaling has already been initialized, send
2141                          * current LQ command
2142                          */
2143                         if (send_lq)
2144                                 il_send_lq_cmd(il, ctx, &lq,
2145                                                                 CMD_SYNC, true);
2146                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2147                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2148                 }
2149         }
2150
2151         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2152         if (!found)
2153                 D_INFO("Restoring all known stations"
2154                                 " .... no stations to be restored.\n");
2155         else
2156                 D_INFO("Restoring all known stations"
2157                                 " .... complete.\n");
2158 }
2159 EXPORT_SYMBOL(il_restore_stations);
2160
2161 int il_get_free_ucode_key_idx(struct il_priv *il)
2162 {
2163         int i;
2164
2165         for (i = 0; i < il->sta_key_max_num; i++)
2166                 if (!test_and_set_bit(i, &il->ucode_key_table))
2167                         return i;
2168
2169         return WEP_INVALID_OFFSET;
2170 }
2171 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2172
2173 void il_dealloc_bcast_stations(struct il_priv *il)
2174 {
2175         unsigned long flags;
2176         int i;
2177
2178         spin_lock_irqsave(&il->sta_lock, flags);
2179         for (i = 0; i < il->hw_params.max_stations; i++) {
2180                 if (!(il->stations[i].used & IL_STA_BCAST))
2181                         continue;
2182
2183                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2184                 il->num_stations--;
2185                 BUG_ON(il->num_stations < 0);
2186                 kfree(il->stations[i].lq);
2187                 il->stations[i].lq = NULL;
2188         }
2189         spin_unlock_irqrestore(&il->sta_lock, flags);
2190 }
2191 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2192
2193 #ifdef CONFIG_IWLEGACY_DEBUG
2194 static void il_dump_lq_cmd(struct il_priv *il,
2195                            struct il_link_quality_cmd *lq)
2196 {
2197         int i;
2198         D_RATE("lq station id 0x%x\n", lq->sta_id);
2199         D_RATE("lq ant 0x%X 0x%X\n",
2200                        lq->general_params.single_stream_ant_msk,
2201                        lq->general_params.dual_stream_ant_msk);
2202
2203         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2204                 D_RATE("lq idx %d 0x%X\n",
2205                                i, lq->rs_table[i].rate_n_flags);
2206 }
2207 #else
2208 static inline void il_dump_lq_cmd(struct il_priv *il,
2209                                    struct il_link_quality_cmd *lq)
2210 {
2211 }
2212 #endif
2213
2214 /**
2215  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2216  *
2217  * It sometimes happens when a HT rate has been in use and we
2218  * loose connectivity with AP then mac80211 will first tell us that the
2219  * current channel is not HT anymore before removing the station. In such a
2220  * scenario the RXON flags will be updated to indicate we are not
2221  * communicating HT anymore, but the LQ command may still contain HT rates.
2222  * Test for this to prevent driver from sending LQ command between the time
2223  * RXON flags are updated and when LQ command is updated.
2224  */
2225 static bool il_is_lq_table_valid(struct il_priv *il,
2226                               struct il_rxon_context *ctx,
2227                               struct il_link_quality_cmd *lq)
2228 {
2229         int i;
2230
2231         if (ctx->ht.enabled)
2232                 return true;
2233
2234         D_INFO("Channel %u is not an HT channel\n",
2235                        ctx->active.channel);
2236         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2237                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
2238                                                 RATE_MCS_HT_MSK) {
2239                         D_INFO(
2240                                        "idx %d of LQ expects HT channel\n",
2241                                        i);
2242                         return false;
2243                 }
2244         }
2245         return true;
2246 }
2247
2248 /**
2249  * il_send_lq_cmd() - Send link quality command
2250  * @init: This command is sent as part of station initialization right
2251  *        after station has been added.
2252  *
2253  * The link quality command is sent as the last step of station creation.
2254  * This is the special case in which init is set and we call a callback in
2255  * this case to clear the state indicating that station creation is in
2256  * progress.
2257  */
2258 int il_send_lq_cmd(struct il_priv *il, struct il_rxon_context *ctx,
2259                     struct il_link_quality_cmd *lq, u8 flags, bool init)
2260 {
2261         int ret = 0;
2262         unsigned long flags_spin;
2263
2264         struct il_host_cmd cmd = {
2265                 .id = C_TX_LINK_QUALITY_CMD,
2266                 .len = sizeof(struct il_link_quality_cmd),
2267                 .flags = flags,
2268                 .data = lq,
2269         };
2270
2271         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2272                 return -EINVAL;
2273
2274
2275         spin_lock_irqsave(&il->sta_lock, flags_spin);
2276         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2277                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2278                 return -EINVAL;
2279         }
2280         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2281
2282         il_dump_lq_cmd(il, lq);
2283         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2284
2285         if (il_is_lq_table_valid(il, ctx, lq))
2286                 ret = il_send_cmd(il, &cmd);
2287         else
2288                 ret = -EINVAL;
2289
2290         if (cmd.flags & CMD_ASYNC)
2291                 return ret;
2292
2293         if (init) {
2294                 D_INFO("init LQ command complete,"
2295                                 " clearing sta addition status for sta %d\n",
2296                                lq->sta_id);
2297                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2298                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2299                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2300         }
2301         return ret;
2302 }
2303 EXPORT_SYMBOL(il_send_lq_cmd);
2304
2305 int il_mac_sta_remove(struct ieee80211_hw *hw,
2306                        struct ieee80211_vif *vif,
2307                        struct ieee80211_sta *sta)
2308 {
2309         struct il_priv *il = hw->priv;
2310         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2311         int ret;
2312
2313         D_INFO("received request to remove station %pM\n",
2314                         sta->addr);
2315         mutex_lock(&il->mutex);
2316         D_INFO("proceeding to remove station %pM\n",
2317                         sta->addr);
2318         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2319         if (ret)
2320                 IL_ERR("Error removing station %pM\n",
2321                         sta->addr);
2322         mutex_unlock(&il->mutex);
2323         return ret;
2324 }
2325 EXPORT_SYMBOL(il_mac_sta_remove);
2326
2327 /************************** RX-FUNCTIONS ****************************/
2328 /*
2329  * Rx theory of operation
2330  *
2331  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2332  * each of which point to Receive Buffers to be filled by the NIC.  These get
2333  * used not only for Rx frames, but for any command response or notification
2334  * from the NIC.  The driver and NIC manage the Rx buffers by means
2335  * of idxes into the circular buffer.
2336  *
2337  * Rx Queue Indexes
2338  * The host/firmware share two idx registers for managing the Rx buffers.
2339  *
2340  * The READ idx maps to the first position that the firmware may be writing
2341  * to -- the driver can read up to (but not including) this position and get
2342  * good data.
2343  * The READ idx is managed by the firmware once the card is enabled.
2344  *
2345  * The WRITE idx maps to the last position the driver has read from -- the
2346  * position preceding WRITE is the last slot the firmware can place a packet.
2347  *
2348  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2349  * WRITE = READ.
2350  *
2351  * During initialization, the host sets up the READ queue position to the first
2352  * IDX position, and WRITE to the last (READ - 1 wrapped)
2353  *
2354  * When the firmware places a packet in a buffer, it will advance the READ idx
2355  * and fire the RX interrupt.  The driver can then query the READ idx and
2356  * process as many packets as possible, moving the WRITE idx forward as it
2357  * resets the Rx queue buffers with new memory.
2358  *
2359  * The management in the driver is as follows:
2360  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2361  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2362  *   to replenish the iwl->rxq->rx_free.
2363  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2364  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2365  *   'processed' and 'read' driver idxes as well)
2366  * + A received packet is processed and handed to the kernel network stack,
2367  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2368  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2369  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2370  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2371  *   were enough free buffers and RX_STALLED is set it is cleared.
2372  *
2373  *
2374  * Driver sequence:
2375  *
2376  * il_rx_queue_alloc()   Allocates rx_free
2377  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2378  *                            il_rx_queue_restock
2379  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2380  *                            queue, updates firmware pointers, and updates
2381  *                            the WRITE idx.  If insufficient rx_free buffers
2382  *                            are available, schedules il_rx_replenish
2383  *
2384  * -- enable interrupts --
2385  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2386  *                            READ IDX, detaching the SKB from the pool.
2387  *                            Moves the packet buffer from queue to rx_used.
2388  *                            Calls il_rx_queue_restock to refill any empty
2389  *                            slots.
2390  * ...
2391  *
2392  */
2393
2394 /**
2395  * il_rx_queue_space - Return number of free slots available in queue.
2396  */
2397 int il_rx_queue_space(const struct il_rx_queue *q)
2398 {
2399         int s = q->read - q->write;
2400         if (s <= 0)
2401                 s += RX_QUEUE_SIZE;
2402         /* keep some buffer to not confuse full and empty queue */
2403         s -= 2;
2404         if (s < 0)
2405                 s = 0;
2406         return s;
2407 }
2408 EXPORT_SYMBOL(il_rx_queue_space);
2409
2410 /**
2411  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2412  */
2413 void
2414 il_rx_queue_update_write_ptr(struct il_priv *il,
2415                                         struct il_rx_queue *q)
2416 {
2417         unsigned long flags;
2418         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2419         u32 reg;
2420
2421         spin_lock_irqsave(&q->lock, flags);
2422
2423         if (q->need_update == 0)
2424                 goto exit_unlock;
2425
2426         /* If power-saving is in use, make sure device is awake */
2427         if (test_bit(S_POWER_PMI, &il->status)) {
2428                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2429
2430                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2431                         D_INFO(
2432                                 "Rx queue requesting wakeup,"
2433                                 " GP1 = 0x%x\n", reg);
2434                         il_set_bit(il, CSR_GP_CNTRL,
2435                                 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2436                         goto exit_unlock;
2437                 }
2438
2439                 q->write_actual = (q->write & ~0x7);
2440                 il_wr(il, rx_wrt_ptr_reg,
2441                                 q->write_actual);
2442
2443         /* Else device is assumed to be awake */
2444         } else {
2445                 /* Device expects a multiple of 8 */
2446                 q->write_actual = (q->write & ~0x7);
2447                 il_wr(il, rx_wrt_ptr_reg,
2448                         q->write_actual);
2449         }
2450
2451         q->need_update = 0;
2452
2453  exit_unlock:
2454         spin_unlock_irqrestore(&q->lock, flags);
2455 }
2456 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2457
2458 int il_rx_queue_alloc(struct il_priv *il)
2459 {
2460         struct il_rx_queue *rxq = &il->rxq;
2461         struct device *dev = &il->pci_dev->dev;
2462         int i;
2463
2464         spin_lock_init(&rxq->lock);
2465         INIT_LIST_HEAD(&rxq->rx_free);
2466         INIT_LIST_HEAD(&rxq->rx_used);
2467
2468         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2469         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2470                                      GFP_KERNEL);
2471         if (!rxq->bd)
2472                 goto err_bd;
2473
2474         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2475                                           &rxq->rb_stts_dma, GFP_KERNEL);
2476         if (!rxq->rb_stts)
2477                 goto err_rb;
2478
2479         /* Fill the rx_used queue with _all_ of the Rx buffers */
2480         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2481                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2482
2483         /* Set us so that we have processed and used all buffers, but have
2484          * not restocked the Rx queue with fresh buffers */
2485         rxq->read = rxq->write = 0;
2486         rxq->write_actual = 0;
2487         rxq->free_count = 0;
2488         rxq->need_update = 0;
2489         return 0;
2490
2491 err_rb:
2492         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2493                           rxq->bd_dma);
2494 err_bd:
2495         return -ENOMEM;
2496 }
2497 EXPORT_SYMBOL(il_rx_queue_alloc);
2498
2499
2500 void il_hdl_spectrum_measurement(struct il_priv *il,
2501                                           struct il_rx_buf *rxb)
2502 {
2503         struct il_rx_pkt *pkt = rxb_addr(rxb);
2504         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2505
2506         if (!report->state) {
2507                 D_11H(
2508                         "Spectrum Measure Notification: Start\n");
2509                 return;
2510         }
2511
2512         memcpy(&il->measure_report, report, sizeof(*report));
2513         il->measurement_status |= MEASUREMENT_READY;
2514 }
2515 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2516
2517 /*
2518  * returns non-zero if packet should be dropped
2519  */
2520 int il_set_decrypted_flag(struct il_priv *il,
2521                            struct ieee80211_hdr *hdr,
2522                            u32 decrypt_res,
2523                            struct ieee80211_rx_status *stats)
2524 {
2525         u16 fc = le16_to_cpu(hdr->frame_control);
2526
2527         /*
2528          * All contexts have the same setting here due to it being
2529          * a module parameter, so OK to check any context.
2530          */
2531         if (il->ctx.active.filter_flags &
2532                                                 RXON_FILTER_DIS_DECRYPT_MSK)
2533                 return 0;
2534
2535         if (!(fc & IEEE80211_FCTL_PROTECTED))
2536                 return 0;
2537
2538         D_RX("decrypt_res:0x%x\n", decrypt_res);
2539         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2540         case RX_RES_STATUS_SEC_TYPE_TKIP:
2541                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2542                  * Decryption will be done in SW. */
2543                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2544                     RX_RES_STATUS_BAD_KEY_TTAK)
2545                         break;
2546
2547         case RX_RES_STATUS_SEC_TYPE_WEP:
2548                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2549                     RX_RES_STATUS_BAD_ICV_MIC) {
2550                         /* bad ICV, the packet is destroyed since the
2551                          * decryption is inplace, drop it */
2552                         D_RX("Packet destroyed\n");
2553                         return -1;
2554                 }
2555         case RX_RES_STATUS_SEC_TYPE_CCMP:
2556                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2557                     RX_RES_STATUS_DECRYPT_OK) {
2558                         D_RX("hw decrypt successfully!!!\n");
2559                         stats->flag |= RX_FLAG_DECRYPTED;
2560                 }
2561                 break;
2562
2563         default:
2564                 break;
2565         }
2566         return 0;
2567 }
2568 EXPORT_SYMBOL(il_set_decrypted_flag);
2569
2570 /**
2571  * il_txq_update_write_ptr - Send new write idx to hardware
2572  */
2573 void
2574 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2575 {
2576         u32 reg = 0;
2577         int txq_id = txq->q.id;
2578
2579         if (txq->need_update == 0)
2580                 return;
2581
2582         /* if we're trying to save power */
2583         if (test_bit(S_POWER_PMI, &il->status)) {
2584                 /* wake up nic if it's powered down ...
2585                  * uCode will wake up, and interrupt us again, so next
2586                  * time we'll skip this part. */
2587                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2588
2589                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2590                         D_INFO(
2591                                         "Tx queue %d requesting wakeup,"
2592                                         " GP1 = 0x%x\n", txq_id, reg);
2593                         il_set_bit(il, CSR_GP_CNTRL,
2594                                         CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2595                         return;
2596                 }
2597
2598                 il_wr(il, HBUS_TARG_WRPTR,
2599                                 txq->q.write_ptr | (txq_id << 8));
2600
2601                 /*
2602                  * else not in power-save mode,
2603                  * uCode will never sleep when we're
2604                  * trying to tx (during RFKILL, we're not trying to tx).
2605                  */
2606         } else
2607                 _il_wr(il, HBUS_TARG_WRPTR,
2608                             txq->q.write_ptr | (txq_id << 8));
2609         txq->need_update = 0;
2610 }
2611 EXPORT_SYMBOL(il_txq_update_write_ptr);
2612
2613 /**
2614  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2615  */
2616 void il_tx_queue_unmap(struct il_priv *il, int txq_id)
2617 {
2618         struct il_tx_queue *txq = &il->txq[txq_id];
2619         struct il_queue *q = &txq->q;
2620
2621         if (q->n_bd == 0)
2622                 return;
2623
2624         while (q->write_ptr != q->read_ptr) {
2625                 il->cfg->ops->lib->txq_free_tfd(il, txq);
2626                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2627         }
2628 }
2629 EXPORT_SYMBOL(il_tx_queue_unmap);
2630
2631 /**
2632  * il_tx_queue_free - Deallocate DMA queue.
2633  * @txq: Transmit queue to deallocate.
2634  *
2635  * Empty queue by removing and destroying all BD's.
2636  * Free all buffers.
2637  * 0-fill, but do not free "txq" descriptor structure.
2638  */
2639 void il_tx_queue_free(struct il_priv *il, int txq_id)
2640 {
2641         struct il_tx_queue *txq = &il->txq[txq_id];
2642         struct device *dev = &il->pci_dev->dev;
2643         int i;
2644
2645         il_tx_queue_unmap(il, txq_id);
2646
2647         /* De-alloc array of command/tx buffers */
2648         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2649                 kfree(txq->cmd[i]);
2650
2651         /* De-alloc circular buffer of TFDs */
2652         if (txq->q.n_bd)
2653                 dma_free_coherent(dev, il->hw_params.tfd_size *
2654                                   txq->q.n_bd, txq->tfds, txq->q.dma_addr);
2655
2656         /* De-alloc array of per-TFD driver data */
2657         kfree(txq->txb);
2658         txq->txb = NULL;
2659
2660         /* deallocate arrays */
2661         kfree(txq->cmd);
2662         kfree(txq->meta);
2663         txq->cmd = NULL;
2664         txq->meta = NULL;
2665
2666         /* 0-fill queue descriptor structure */
2667         memset(txq, 0, sizeof(*txq));
2668 }
2669 EXPORT_SYMBOL(il_tx_queue_free);
2670
2671 /**
2672  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2673  */
2674 void il_cmd_queue_unmap(struct il_priv *il)
2675 {
2676         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2677         struct il_queue *q = &txq->q;
2678         int i;
2679
2680         if (q->n_bd == 0)
2681                 return;
2682
2683         while (q->read_ptr != q->write_ptr) {
2684                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2685
2686                 if (txq->meta[i].flags & CMD_MAPPED) {
2687                         pci_unmap_single(il->pci_dev,
2688                                          dma_unmap_addr(&txq->meta[i], mapping),
2689                                          dma_unmap_len(&txq->meta[i], len),
2690                                          PCI_DMA_BIDIRECTIONAL);
2691                         txq->meta[i].flags = 0;
2692                 }
2693
2694                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2695         }
2696
2697         i = q->n_win;
2698         if (txq->meta[i].flags & CMD_MAPPED) {
2699                 pci_unmap_single(il->pci_dev,
2700                                  dma_unmap_addr(&txq->meta[i], mapping),
2701                                  dma_unmap_len(&txq->meta[i], len),
2702                                  PCI_DMA_BIDIRECTIONAL);
2703                 txq->meta[i].flags = 0;
2704         }
2705 }
2706 EXPORT_SYMBOL(il_cmd_queue_unmap);
2707
2708 /**
2709  * il_cmd_queue_free - Deallocate DMA queue.
2710  * @txq: Transmit queue to deallocate.
2711  *
2712  * Empty queue by removing and destroying all BD's.
2713  * Free all buffers.
2714  * 0-fill, but do not free "txq" descriptor structure.
2715  */
2716 void il_cmd_queue_free(struct il_priv *il)
2717 {
2718         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2719         struct device *dev = &il->pci_dev->dev;
2720         int i;
2721
2722         il_cmd_queue_unmap(il);
2723
2724         /* De-alloc array of command/tx buffers */
2725         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2726                 kfree(txq->cmd[i]);
2727
2728         /* De-alloc circular buffer of TFDs */
2729         if (txq->q.n_bd)
2730                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2731                                   txq->tfds, txq->q.dma_addr);
2732
2733         /* deallocate arrays */
2734         kfree(txq->cmd);
2735         kfree(txq->meta);
2736         txq->cmd = NULL;
2737         txq->meta = NULL;
2738
2739         /* 0-fill queue descriptor structure */
2740         memset(txq, 0, sizeof(*txq));
2741 }
2742 EXPORT_SYMBOL(il_cmd_queue_free);
2743
2744 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2745  * DMA services
2746  *
2747  * Theory of operation
2748  *
2749  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2750  * of buffer descriptors, each of which points to one or more data buffers for
2751  * the device to read from or fill.  Driver and device exchange status of each
2752  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2753  * entries in each circular buffer, to protect against confusing empty and full
2754  * queue states.
2755  *
2756  * The device reads or writes the data in the queues via the device's several
2757  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2758  *
2759  * For Tx queue, there are low mark and high mark limits. If, after queuing
2760  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2761  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2762  * Tx queue resumed.
2763  *
2764  * See more detailed info in 4965.h.
2765  ***************************************************/
2766
2767 int il_queue_space(const struct il_queue *q)
2768 {
2769         int s = q->read_ptr - q->write_ptr;
2770
2771         if (q->read_ptr > q->write_ptr)
2772                 s -= q->n_bd;
2773
2774         if (s <= 0)
2775                 s += q->n_win;
2776         /* keep some reserve to not confuse empty and full situations */
2777         s -= 2;
2778         if (s < 0)
2779                 s = 0;
2780         return s;
2781 }
2782 EXPORT_SYMBOL(il_queue_space);
2783
2784
2785 /**
2786  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2787  */
2788 static int il_queue_init(struct il_priv *il, struct il_queue *q,
2789                           int count, int slots_num, u32 id)
2790 {
2791         q->n_bd = count;
2792         q->n_win = slots_num;
2793         q->id = id;
2794
2795         /* count must be power-of-two size, otherwise il_queue_inc_wrap
2796          * and il_queue_dec_wrap are broken. */
2797         BUG_ON(!is_power_of_2(count));
2798
2799         /* slots_num must be power-of-two size, otherwise
2800          * il_get_cmd_idx is broken. */
2801         BUG_ON(!is_power_of_2(slots_num));
2802
2803         q->low_mark = q->n_win / 4;
2804         if (q->low_mark < 4)
2805                 q->low_mark = 4;
2806
2807         q->high_mark = q->n_win / 8;
2808         if (q->high_mark < 2)
2809                 q->high_mark = 2;
2810
2811         q->write_ptr = q->read_ptr = 0;
2812
2813         return 0;
2814 }
2815
2816 /**
2817  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2818  */
2819 static int il_tx_queue_alloc(struct il_priv *il,
2820                               struct il_tx_queue *txq, u32 id)
2821 {
2822         struct device *dev = &il->pci_dev->dev;
2823         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2824
2825         /* Driver ilate data, only for Tx (not command) queues,
2826          * not shared with device. */
2827         if (id != il->cmd_queue) {
2828                 txq->txb = kzalloc(sizeof(txq->txb[0]) *
2829                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
2830                 if (!txq->txb) {
2831                         IL_ERR("kmalloc for auxiliary BD "
2832                                   "structures failed\n");
2833                         goto error;
2834                 }
2835         } else {
2836                 txq->txb = NULL;
2837         }
2838
2839         /* Circular buffer of transmit frame descriptors (TFDs),
2840          * shared with device */
2841         txq->tfds = dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr,
2842                                        GFP_KERNEL);
2843         if (!txq->tfds) {
2844                 IL_ERR("pci_alloc_consistent(%zd) failed\n", tfd_sz);
2845                 goto error;
2846         }
2847         txq->q.id = id;
2848
2849         return 0;
2850
2851  error:
2852         kfree(txq->txb);
2853         txq->txb = NULL;
2854
2855         return -ENOMEM;
2856 }
2857
2858 /**
2859  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2860  */
2861 int il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq,
2862                       int slots_num, u32 txq_id)
2863 {
2864         int i, len;
2865         int ret;
2866         int actual_slots = slots_num;
2867
2868         /*
2869          * Alloc buffer array for commands (Tx or other types of commands).
2870          * For the command queue (#4/#9), allocate command space + one big
2871          * command for scan, since scan command is very huge; the system will
2872          * not have two scans at the same time, so only one is needed.
2873          * For normal Tx queues (all other queues), no super-size command
2874          * space is needed.
2875          */
2876         if (txq_id == il->cmd_queue)
2877                 actual_slots++;
2878
2879         txq->meta = kzalloc(sizeof(struct il_cmd_meta) * actual_slots,
2880                             GFP_KERNEL);
2881         txq->cmd = kzalloc(sizeof(struct il_device_cmd *) * actual_slots,
2882                            GFP_KERNEL);
2883
2884         if (!txq->meta || !txq->cmd)
2885                 goto out_free_arrays;
2886
2887         len = sizeof(struct il_device_cmd);
2888         for (i = 0; i < actual_slots; i++) {
2889                 /* only happens for cmd queue */
2890                 if (i == slots_num)
2891                         len = IL_MAX_CMD_SIZE;
2892
2893                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
2894                 if (!txq->cmd[i])
2895                         goto err;
2896         }
2897
2898         /* Alloc driver data array and TFD circular buffer */
2899         ret = il_tx_queue_alloc(il, txq, txq_id);
2900         if (ret)
2901                 goto err;
2902
2903         txq->need_update = 0;
2904
2905         /*
2906          * For the default queues 0-3, set up the swq_id
2907          * already -- all others need to get one later
2908          * (if they need one at all).
2909          */
2910         if (txq_id < 4)
2911                 il_set_swq_id(txq, txq_id, txq_id);
2912
2913         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2914          * il_queue_inc_wrap and il_queue_dec_wrap are broken. */
2915         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2916
2917         /* Initialize queue's high/low-water marks, and head/tail idxes */
2918         il_queue_init(il, &txq->q,
2919                                 TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2920
2921         /* Tell device where to find queue */
2922         il->cfg->ops->lib->txq_init(il, txq);
2923
2924         return 0;
2925 err:
2926         for (i = 0; i < actual_slots; i++)
2927                 kfree(txq->cmd[i]);
2928 out_free_arrays:
2929         kfree(txq->meta);
2930         kfree(txq->cmd);
2931
2932         return -ENOMEM;
2933 }
2934 EXPORT_SYMBOL(il_tx_queue_init);
2935
2936 void il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq,
2937                         int slots_num, u32 txq_id)
2938 {
2939         int actual_slots = slots_num;
2940
2941         if (txq_id == il->cmd_queue)
2942                 actual_slots++;
2943
2944         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
2945
2946         txq->need_update = 0;
2947
2948         /* Initialize queue's high/low-water marks, and head/tail idxes */
2949         il_queue_init(il, &txq->q,
2950                                 TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2951
2952         /* Tell device where to find queue */
2953         il->cfg->ops->lib->txq_init(il, txq);
2954 }
2955 EXPORT_SYMBOL(il_tx_queue_reset);
2956
2957 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
2958
2959 /**
2960  * il_enqueue_hcmd - enqueue a uCode command
2961  * @il: device ilate data point
2962  * @cmd: a point to the ucode command structure
2963  *
2964  * The function returns < 0 values to indicate the operation is
2965  * failed. On success, it turns the idx (> 0) of command in the
2966  * command queue.
2967  */
2968 int il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
2969 {
2970         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2971         struct il_queue *q = &txq->q;
2972         struct il_device_cmd *out_cmd;
2973         struct il_cmd_meta *out_meta;
2974         dma_addr_t phys_addr;
2975         unsigned long flags;
2976         int len;
2977         u32 idx;
2978         u16 fix_size;
2979
2980         cmd->len = il->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
2981         fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
2982
2983         /* If any of the command structures end up being larger than
2984          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
2985          * we will need to increase the size of the TFD entries
2986          * Also, check to see if command buffer should not exceed the size
2987          * of device_cmd and max_cmd_size. */
2988         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
2989                !(cmd->flags & CMD_SIZE_HUGE));
2990         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
2991
2992         if (il_is_rfkill(il) || il_is_ctkill(il)) {
2993                 IL_WARN("Not sending command - %s KILL\n",
2994                          il_is_rfkill(il) ? "RF" : "CT");
2995                 return -EIO;
2996         }
2997
2998         spin_lock_irqsave(&il->hcmd_lock, flags);
2999
3000         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3001                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3002
3003                 IL_ERR("Restarting adapter due to command queue full\n");
3004                 queue_work(il->workqueue, &il->restart);
3005                 return -ENOSPC;
3006         }
3007
3008         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3009         out_cmd = txq->cmd[idx];
3010         out_meta = &txq->meta[idx];
3011
3012         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3013                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3014                 return -ENOSPC;
3015         }
3016
3017         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3018         out_meta->flags = cmd->flags | CMD_MAPPED;
3019         if (cmd->flags & CMD_WANT_SKB)
3020                 out_meta->source = cmd;
3021         if (cmd->flags & CMD_ASYNC)
3022                 out_meta->callback = cmd->callback;
3023
3024         out_cmd->hdr.cmd = cmd->id;
3025         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3026
3027         /* At this point, the out_cmd now has all of the incoming cmd
3028          * information */
3029
3030         out_cmd->hdr.flags = 0;
3031         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) |
3032                         IDX_TO_SEQ(q->write_ptr));
3033         if (cmd->flags & CMD_SIZE_HUGE)
3034                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3035         len = sizeof(struct il_device_cmd);
3036         if (idx == TFD_CMD_SLOTS)
3037                 len = IL_MAX_CMD_SIZE;
3038
3039 #ifdef CONFIG_IWLEGACY_DEBUG
3040         switch (out_cmd->hdr.cmd) {
3041         case C_TX_LINK_QUALITY_CMD:
3042         case C_SENSITIVITY:
3043                 D_HC_DUMP(
3044                                 "Sending command %s (#%x), seq: 0x%04X, "
3045                                 "%d bytes at %d[%d]:%d\n",
3046                                 il_get_cmd_string(out_cmd->hdr.cmd),
3047                                 out_cmd->hdr.cmd,
3048                                 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3049                                 q->write_ptr, idx, il->cmd_queue);
3050                 break;
3051         default:
3052                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3053                                 "%d bytes at %d[%d]:%d\n",
3054                                 il_get_cmd_string(out_cmd->hdr.cmd),
3055                                 out_cmd->hdr.cmd,
3056                                 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3057                                 q->write_ptr, idx, il->cmd_queue);
3058         }
3059 #endif
3060         txq->need_update = 1;
3061
3062         if (il->cfg->ops->lib->txq_update_byte_cnt_tbl)
3063                 /* Set up entry in queue's byte count circular buffer */
3064                 il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0);
3065
3066         phys_addr = pci_map_single(il->pci_dev, &out_cmd->hdr,
3067                                    fix_size, PCI_DMA_BIDIRECTIONAL);
3068         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3069         dma_unmap_len_set(out_meta, len, fix_size);
3070
3071         il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
3072                                                    phys_addr, fix_size, 1,
3073                                                    U32_PAD(cmd->len));
3074
3075         /* Increment and update queue's write idx */
3076         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3077         il_txq_update_write_ptr(il, txq);
3078
3079         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3080         return idx;
3081 }
3082
3083 /**
3084  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3085  *
3086  * When FW advances 'R' idx, all entries between old and new 'R' idx
3087  * need to be reclaimed. As result, some free space forms.  If there is
3088  * enough free space (> low mark), wake the stack that feeds us.
3089  */
3090 static void il_hcmd_queue_reclaim(struct il_priv *il, int txq_id,
3091                                    int idx, int cmd_idx)
3092 {
3093         struct il_tx_queue *txq = &il->txq[txq_id];
3094         struct il_queue *q = &txq->q;
3095         int nfreed = 0;
3096
3097         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3098                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3099                           "is out of range [0-%d] %d %d.\n", txq_id,
3100                           idx, q->n_bd, q->write_ptr, q->read_ptr);
3101                 return;
3102         }
3103
3104         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3105              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3106
3107                 if (nfreed++ > 0) {
3108                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3109                                         q->write_ptr, q->read_ptr);
3110                         queue_work(il->workqueue, &il->restart);
3111                 }
3112
3113         }
3114 }
3115
3116 /**
3117  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3118  * @rxb: Rx buffer to reclaim
3119  *
3120  * If an Rx buffer has an async callback associated with it the callback
3121  * will be executed.  The attached skb (if present) will only be freed
3122  * if the callback returns 1
3123  */
3124 void
3125 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3126 {
3127         struct il_rx_pkt *pkt = rxb_addr(rxb);
3128         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3129         int txq_id = SEQ_TO_QUEUE(sequence);
3130         int idx = SEQ_TO_IDX(sequence);
3131         int cmd_idx;
3132         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3133         struct il_device_cmd *cmd;
3134         struct il_cmd_meta *meta;
3135         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3136         unsigned long flags;
3137
3138         /* If a Tx command is being handled and it isn't in the actual
3139          * command queue then there a command routing bug has been introduced
3140          * in the queue management code. */
3141         if (WARN(txq_id != il->cmd_queue,
3142                  "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3143                   txq_id, il->cmd_queue, sequence,
3144                   il->txq[il->cmd_queue].q.read_ptr,
3145                   il->txq[il->cmd_queue].q.write_ptr)) {
3146                 il_print_hex_error(il, pkt, 32);
3147                 return;
3148         }
3149
3150         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3151         cmd = txq->cmd[cmd_idx];
3152         meta = &txq->meta[cmd_idx];
3153
3154         txq->time_stamp = jiffies;
3155
3156         pci_unmap_single(il->pci_dev,
3157                          dma_unmap_addr(meta, mapping),
3158                          dma_unmap_len(meta, len),
3159                          PCI_DMA_BIDIRECTIONAL);
3160
3161         /* Input error checking is done when commands are added to queue. */
3162         if (meta->flags & CMD_WANT_SKB) {
3163                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3164                 rxb->page = NULL;
3165         } else if (meta->callback)
3166                 meta->callback(il, cmd, pkt);
3167
3168         spin_lock_irqsave(&il->hcmd_lock, flags);
3169
3170         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3171
3172         if (!(meta->flags & CMD_ASYNC)) {
3173                 clear_bit(S_HCMD_ACTIVE, &il->status);
3174                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3175                                il_get_cmd_string(cmd->hdr.cmd));
3176                 wake_up(&il->wait_command_queue);
3177         }
3178
3179         /* Mark as unmapped */
3180         meta->flags = 0;
3181
3182         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3183 }
3184 EXPORT_SYMBOL(il_tx_cmd_complete);
3185
3186 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3187 MODULE_VERSION(IWLWIFI_VERSION);
3188 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3189 MODULE_LICENSE("GPL");
3190
3191 /*
3192  * set bt_coex_active to true, uCode will do kill/defer
3193  * every time the priority line is asserted (BT is sending signals on the
3194  * priority line in the PCIx).
3195  * set bt_coex_active to false, uCode will ignore the BT activity and
3196  * perform the normal operation
3197  *
3198  * User might experience transmit issue on some platform due to WiFi/BT
3199  * co-exist problem. The possible behaviors are:
3200  *   Able to scan and finding all the available AP
3201  *   Not able to associate with any AP
3202  * On those platforms, WiFi communication can be restored by set
3203  * "bt_coex_active" module parameter to "false"
3204  *
3205  * default: bt_coex_active = true (BT_COEX_ENABLE)
3206  */
3207 static bool bt_coex_active = true;
3208 module_param(bt_coex_active, bool, S_IRUGO);
3209 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3210
3211 u32 il_debug_level;
3212 EXPORT_SYMBOL(il_debug_level);
3213
3214 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3215 EXPORT_SYMBOL(il_bcast_addr);
3216
3217
3218 /* This function both allocates and initializes hw and il. */
3219 struct ieee80211_hw *il_alloc_all(struct il_cfg *cfg)
3220 {
3221         struct il_priv *il;
3222         /* mac80211 allocates memory for this device instance, including
3223          *   space for this driver's ilate structure */
3224         struct ieee80211_hw *hw;
3225
3226         hw = ieee80211_alloc_hw(sizeof(struct il_priv),
3227                                 cfg->ops->ieee80211_ops);
3228         if (hw == NULL) {
3229                 pr_err("%s: Can not allocate network device\n",
3230                        cfg->name);
3231                 goto out;
3232         }
3233
3234         il = hw->priv;
3235         il->hw = hw;
3236
3237 out:
3238         return hw;
3239 }
3240 EXPORT_SYMBOL(il_alloc_all);
3241
3242 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3243 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3244 static void il_init_ht_hw_capab(const struct il_priv *il,
3245                               struct ieee80211_sta_ht_cap *ht_info,
3246                               enum ieee80211_band band)
3247 {
3248         u16 max_bit_rate = 0;
3249         u8 rx_chains_num = il->hw_params.rx_chains_num;
3250         u8 tx_chains_num = il->hw_params.tx_chains_num;
3251
3252         ht_info->cap = 0;
3253         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3254
3255         ht_info->ht_supported = true;
3256
3257         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3258         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3259         if (il->hw_params.ht40_channel & BIT(band)) {
3260                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3261                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3262                 ht_info->mcs.rx_mask[4] = 0x01;
3263                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3264         }
3265
3266         if (il->cfg->mod_params->amsdu_size_8K)
3267                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3268
3269         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3270         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3271
3272         ht_info->mcs.rx_mask[0] = 0xFF;
3273         if (rx_chains_num >= 2)
3274                 ht_info->mcs.rx_mask[1] = 0xFF;
3275         if (rx_chains_num >= 3)
3276                 ht_info->mcs.rx_mask[2] = 0xFF;
3277
3278         /* Highest supported Rx data rate */
3279         max_bit_rate *= rx_chains_num;
3280         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3281         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3282
3283         /* Tx MCS capabilities */
3284         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3285         if (tx_chains_num != rx_chains_num) {
3286                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3287                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
3288                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3289         }
3290 }
3291
3292 /**
3293  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3294  */
3295 int il_init_geos(struct il_priv *il)
3296 {
3297         struct il_channel_info *ch;
3298         struct ieee80211_supported_band *sband;
3299         struct ieee80211_channel *channels;
3300         struct ieee80211_channel *geo_ch;
3301         struct ieee80211_rate *rates;
3302         int i = 0;
3303         s8 max_tx_power = 0;
3304
3305         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3306             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3307                 D_INFO("Geography modes already initialized.\n");
3308                 set_bit(S_GEO_CONFIGURED, &il->status);
3309                 return 0;
3310         }
3311
3312         channels = kzalloc(sizeof(struct ieee80211_channel) *
3313                            il->channel_count, GFP_KERNEL);
3314         if (!channels)
3315                 return -ENOMEM;
3316
3317         rates = kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3318                         GFP_KERNEL);
3319         if (!rates) {
3320                 kfree(channels);
3321                 return -ENOMEM;
3322         }
3323
3324         /* 5.2GHz channels start after the 2.4GHz channels */
3325         sband = &il->bands[IEEE80211_BAND_5GHZ];
3326         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3327         /* just OFDM */
3328         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3329         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3330
3331         if (il->cfg->sku & IL_SKU_N)
3332                 il_init_ht_hw_capab(il, &sband->ht_cap,
3333                                          IEEE80211_BAND_5GHZ);
3334
3335         sband = &il->bands[IEEE80211_BAND_2GHZ];
3336         sband->channels = channels;
3337         /* OFDM & CCK */
3338         sband->bitrates = rates;
3339         sband->n_bitrates = RATE_COUNT_LEGACY;
3340
3341         if (il->cfg->sku & IL_SKU_N)
3342                 il_init_ht_hw_capab(il, &sband->ht_cap,
3343                                          IEEE80211_BAND_2GHZ);
3344
3345         il->ieee_channels = channels;
3346         il->ieee_rates = rates;
3347
3348         for (i = 0;  i < il->channel_count; i++) {
3349                 ch = &il->channel_info[i];
3350
3351                 if (!il_is_channel_valid(ch))
3352                         continue;
3353
3354                 sband = &il->bands[ch->band];
3355
3356                 geo_ch = &sband->channels[sband->n_channels++];
3357
3358                 geo_ch->center_freq =
3359                         ieee80211_channel_to_frequency(ch->channel, ch->band);
3360                 geo_ch->max_power = ch->max_power_avg;
3361                 geo_ch->max_antenna_gain = 0xff;
3362                 geo_ch->hw_value = ch->channel;
3363
3364                 if (il_is_channel_valid(ch)) {
3365                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3366                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3367
3368                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3369                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3370
3371                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3372                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3373
3374                         geo_ch->flags |= ch->ht40_extension_channel;
3375
3376                         if (ch->max_power_avg > max_tx_power)
3377                                 max_tx_power = ch->max_power_avg;
3378                 } else {
3379                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3380                 }
3381
3382                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
3383                                 ch->channel, geo_ch->center_freq,
3384                                 il_is_channel_a_band(ch) ?  "5.2" : "2.4",
3385                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
3386                                 "restricted" : "valid",
3387                                  geo_ch->flags);
3388         }
3389
3390         il->tx_power_device_lmt = max_tx_power;
3391         il->tx_power_user_lmt = max_tx_power;
3392         il->tx_power_next = max_tx_power;
3393
3394         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3395             (il->cfg->sku & IL_SKU_A)) {
3396                 IL_INFO("Incorrectly detected BG card as ABG. "
3397                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3398                            il->pci_dev->device,
3399                            il->pci_dev->subsystem_device);
3400                 il->cfg->sku &= ~IL_SKU_A;
3401         }
3402
3403         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3404                    il->bands[IEEE80211_BAND_2GHZ].n_channels,
3405                    il->bands[IEEE80211_BAND_5GHZ].n_channels);
3406
3407         set_bit(S_GEO_CONFIGURED, &il->status);
3408
3409         return 0;
3410 }
3411 EXPORT_SYMBOL(il_init_geos);
3412
3413 /*
3414  * il_free_geos - undo allocations in il_init_geos
3415  */
3416 void il_free_geos(struct il_priv *il)
3417 {
3418         kfree(il->ieee_channels);
3419         kfree(il->ieee_rates);
3420         clear_bit(S_GEO_CONFIGURED, &il->status);
3421 }
3422 EXPORT_SYMBOL(il_free_geos);
3423
3424 static bool il_is_channel_extension(struct il_priv *il,
3425                                      enum ieee80211_band band,
3426                                      u16 channel, u8 extension_chan_offset)
3427 {
3428         const struct il_channel_info *ch_info;
3429
3430         ch_info = il_get_channel_info(il, band, channel);
3431         if (!il_is_channel_valid(ch_info))
3432                 return false;
3433
3434         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3435                 return !(ch_info->ht40_extension_channel &
3436                                         IEEE80211_CHAN_NO_HT40PLUS);
3437         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3438                 return !(ch_info->ht40_extension_channel &
3439                                         IEEE80211_CHAN_NO_HT40MINUS);
3440
3441         return false;
3442 }
3443
3444 bool il_is_ht40_tx_allowed(struct il_priv *il,
3445                             struct il_rxon_context *ctx,
3446                             struct ieee80211_sta_ht_cap *ht_cap)
3447 {
3448         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
3449                 return false;
3450
3451         /*
3452          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3453          * the bit will not set if it is pure 40MHz case
3454          */
3455         if (ht_cap && !ht_cap->ht_supported)
3456                 return false;
3457
3458 #ifdef CONFIG_IWLEGACY_DEBUGFS
3459         if (il->disable_ht40)
3460                 return false;
3461 #endif
3462
3463         return il_is_channel_extension(il, il->band,
3464                         le16_to_cpu(ctx->staging.channel),
3465                         ctx->ht.extension_chan_offset);
3466 }
3467 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3468
3469 static u16 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3470 {
3471         u16 new_val;
3472         u16 beacon_factor;
3473
3474         /*
3475          * If mac80211 hasn't given us a beacon interval, program
3476          * the default into the device.
3477          */
3478         if (!beacon_val)
3479                 return DEFAULT_BEACON_INTERVAL;
3480
3481         /*
3482          * If the beacon interval we obtained from the peer
3483          * is too large, we'll have to wake up more often
3484          * (and in IBSS case, we'll beacon too much)
3485          *
3486          * For example, if max_beacon_val is 4096, and the
3487          * requested beacon interval is 7000, we'll have to
3488          * use 3500 to be able to wake up on the beacons.
3489          *
3490          * This could badly influence beacon detection stats.
3491          */
3492
3493         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3494         new_val = beacon_val / beacon_factor;
3495
3496         if (!new_val)
3497                 new_val = max_beacon_val;
3498
3499         return new_val;
3500 }
3501
3502 int
3503 il_send_rxon_timing(struct il_priv *il, struct il_rxon_context *ctx)
3504 {
3505         u64 tsf;
3506         s32 interval_tm, rem;
3507         struct ieee80211_conf *conf = NULL;
3508         u16 beacon_int;
3509         struct ieee80211_vif *vif = ctx->vif;
3510
3511         conf = &il->hw->conf;
3512
3513         lockdep_assert_held(&il->mutex);
3514
3515         memset(&ctx->timing, 0, sizeof(struct il_rxon_time_cmd));
3516
3517         ctx->timing.timestamp = cpu_to_le64(il->timestamp);
3518         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3519
3520         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3521
3522         /*
3523          * TODO: For IBSS we need to get atim_win from mac80211,
3524          *       for now just always use 0
3525          */
3526         ctx->timing.atim_win = 0;
3527
3528         beacon_int = il_adjust_beacon_interval(beacon_int,
3529                         il->hw_params.max_beacon_itrvl * TIME_UNIT);
3530         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
3531
3532         tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3533         interval_tm = beacon_int * TIME_UNIT;
3534         rem = do_div(tsf, interval_tm);
3535         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3536
3537         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
3538
3539         D_ASSOC(
3540                         "beacon interval %d beacon timer %d beacon tim %d\n",
3541                         le16_to_cpu(ctx->timing.beacon_interval),
3542                         le32_to_cpu(ctx->timing.beacon_init_val),
3543                         le16_to_cpu(ctx->timing.atim_win));
3544
3545         return il_send_cmd_pdu(il, ctx->rxon_timing_cmd,
3546                                 sizeof(ctx->timing), &ctx->timing);
3547 }
3548 EXPORT_SYMBOL(il_send_rxon_timing);
3549
3550 void
3551 il_set_rxon_hwcrypto(struct il_priv *il,
3552                                 struct il_rxon_context *ctx,
3553                                 int hw_decrypt)
3554 {
3555         struct il_rxon_cmd *rxon = &ctx->staging;
3556
3557         if (hw_decrypt)
3558                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3559         else
3560                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3561
3562 }
3563 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3564
3565 /* validate RXON structure is valid */
3566 int
3567 il_check_rxon_cmd(struct il_priv *il, struct il_rxon_context *ctx)
3568 {
3569         struct il_rxon_cmd *rxon = &ctx->staging;
3570         bool error = false;
3571
3572         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3573                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3574                         IL_WARN("check 2.4G: wrong narrow\n");
3575                         error = true;
3576                 }
3577                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3578                         IL_WARN("check 2.4G: wrong radar\n");
3579                         error = true;
3580                 }
3581         } else {
3582                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3583                         IL_WARN("check 5.2G: not short slot!\n");
3584                         error = true;
3585                 }
3586                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3587                         IL_WARN("check 5.2G: CCK!\n");
3588                         error = true;
3589                 }
3590         }
3591         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3592                 IL_WARN("mac/bssid mcast!\n");
3593                 error = true;
3594         }
3595
3596         /* make sure basic rates 6Mbps and 1Mbps are supported */
3597         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3598             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3599                 IL_WARN("neither 1 nor 6 are basic\n");
3600                 error = true;
3601         }
3602
3603         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3604                 IL_WARN("aid > 2007\n");
3605                 error = true;
3606         }
3607
3608         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
3609                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3610                 IL_WARN("CCK and short slot\n");
3611                 error = true;
3612         }
3613
3614         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
3615                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3616                 IL_WARN("CCK and auto detect");
3617                 error = true;
3618         }
3619
3620         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
3621                             RXON_FLG_TGG_PROTECT_MSK)) ==
3622                             RXON_FLG_TGG_PROTECT_MSK) {
3623                 IL_WARN("TGg but no auto-detect\n");
3624                 error = true;
3625         }
3626
3627         if (error)
3628                 IL_WARN("Tuning to channel %d\n",
3629                             le16_to_cpu(rxon->channel));
3630
3631         if (error) {
3632                 IL_ERR("Invalid RXON\n");
3633                 return -EINVAL;
3634         }
3635         return 0;
3636 }
3637 EXPORT_SYMBOL(il_check_rxon_cmd);
3638
3639 /**
3640  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3641  * @il: staging_rxon is compared to active_rxon
3642  *
3643  * If the RXON structure is changing enough to require a new tune,
3644  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3645  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3646  */
3647 int il_full_rxon_required(struct il_priv *il,
3648                            struct il_rxon_context *ctx)
3649 {
3650         const struct il_rxon_cmd *staging = &ctx->staging;
3651         const struct il_rxon_cmd *active = &ctx->active;
3652
3653 #define CHK(cond)                                                       \
3654         if ((cond)) {                                                   \
3655                 D_INFO("need full RXON - " #cond "\n"); \
3656                 return 1;                                               \
3657         }
3658
3659 #define CHK_NEQ(c1, c2)                                         \
3660         if ((c1) != (c2)) {                                     \
3661                 D_INFO("need full RXON - "      \
3662                                #c1 " != " #c2 " - %d != %d\n",  \
3663                                (c1), (c2));                     \
3664                 return 1;                                       \
3665         }
3666
3667         /* These items are only settable from the full RXON command */
3668         CHK(!il_is_associated_ctx(ctx));
3669         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
3670         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
3671         CHK(compare_ether_addr(staging->wlap_bssid_addr,
3672                                 active->wlap_bssid_addr));
3673         CHK_NEQ(staging->dev_type, active->dev_type);
3674         CHK_NEQ(staging->channel, active->channel);
3675         CHK_NEQ(staging->air_propagation, active->air_propagation);
3676         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3677                 active->ofdm_ht_single_stream_basic_rates);
3678         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3679                 active->ofdm_ht_dual_stream_basic_rates);
3680         CHK_NEQ(staging->assoc_id, active->assoc_id);
3681
3682         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3683          * be updated with the RXON_ASSOC command -- however only some
3684          * flag transitions are allowed using RXON_ASSOC */
3685
3686         /* Check if we are not switching bands */
3687         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3688                 active->flags & RXON_FLG_BAND_24G_MSK);
3689
3690         /* Check if we are switching association toggle */
3691         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3692                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3693
3694 #undef CHK
3695 #undef CHK_NEQ
3696
3697         return 0;
3698 }
3699 EXPORT_SYMBOL(il_full_rxon_required);
3700
3701 u8 il_get_lowest_plcp(struct il_priv *il,
3702                             struct il_rxon_context *ctx)
3703 {
3704         /*
3705          * Assign the lowest rate -- should really get this from
3706          * the beacon skb from mac80211.
3707          */
3708         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
3709                 return RATE_1M_PLCP;
3710         else
3711                 return RATE_6M_PLCP;
3712 }
3713 EXPORT_SYMBOL(il_get_lowest_plcp);
3714
3715 static void _il_set_rxon_ht(struct il_priv *il,
3716                              struct il_ht_config *ht_conf,
3717                              struct il_rxon_context *ctx)
3718 {
3719         struct il_rxon_cmd *rxon = &ctx->staging;
3720
3721         if (!ctx->ht.enabled) {
3722                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
3723                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
3724                         RXON_FLG_HT40_PROT_MSK |
3725                         RXON_FLG_HT_PROT_MSK);
3726                 return;
3727         }
3728
3729         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
3730                                         RXON_FLG_HT_OPERATING_MODE_POS);
3731
3732         /* Set up channel bandwidth:
3733          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3734         /* clear the HT channel mode before set the mode */
3735         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
3736                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3737         if (il_is_ht40_tx_allowed(il, ctx, NULL)) {
3738                 /* pure ht40 */
3739                 if (ctx->ht.protection ==
3740                                 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3741                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3742                         /* Note: control channel is opposite of extension channel */
3743                         switch (ctx->ht.extension_chan_offset) {
3744                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3745                                 rxon->flags &=
3746                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3747                                 break;
3748                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3749                                 rxon->flags |=
3750                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3751                                 break;
3752                         }
3753                 } else {
3754                         /* Note: control channel is opposite of extension channel */
3755                         switch (ctx->ht.extension_chan_offset) {
3756                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3757                                 rxon->flags &=
3758                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3759                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3760                                 break;
3761                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3762                                 rxon->flags |=
3763                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3764                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3765                                 break;
3766                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3767                         default:
3768                                 /* channel location only valid if in Mixed mode */
3769                                 IL_ERR(
3770                                         "invalid extension channel offset\n");
3771                                 break;
3772                         }
3773                 }
3774         } else {
3775                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3776         }
3777
3778         if (il->cfg->ops->hcmd->set_rxon_chain)
3779                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
3780
3781         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3782                         "extension channel offset 0x%x\n",
3783                         le32_to_cpu(rxon->flags), ctx->ht.protection,
3784                         ctx->ht.extension_chan_offset);
3785 }
3786
3787 void il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3788 {
3789         _il_set_rxon_ht(il, ht_conf, &il->ctx);
3790 }
3791 EXPORT_SYMBOL(il_set_rxon_ht);
3792
3793 /* Return valid, unused, channel for a passive scan to reset the RF */
3794 u8 il_get_single_channel_number(struct il_priv *il,
3795                                  enum ieee80211_band band)
3796 {
3797         const struct il_channel_info *ch_info;
3798         int i;
3799         u8 channel = 0;
3800         u8 min, max;
3801
3802         if (band == IEEE80211_BAND_5GHZ) {
3803                 min = 14;
3804                 max = il->channel_count;
3805         } else {
3806                 min = 0;
3807                 max = 14;
3808         }
3809
3810         for (i = min; i < max; i++) {
3811                 channel = il->channel_info[i].channel;
3812                 if (channel == le16_to_cpu(il->ctx.staging.channel))
3813                         continue;
3814
3815                 ch_info = il_get_channel_info(il, band, channel);
3816                 if (il_is_channel_valid(ch_info))
3817                         break;
3818         }
3819
3820         return channel;
3821 }
3822 EXPORT_SYMBOL(il_get_single_channel_number);
3823
3824 /**
3825  * il_set_rxon_channel - Set the band and channel values in staging RXON
3826  * @ch: requested channel as a pointer to struct ieee80211_channel
3827
3828  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3829  * in the staging RXON flag structure based on the ch->band
3830  */
3831 int
3832 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch,
3833                          struct il_rxon_context *ctx)
3834 {
3835         enum ieee80211_band band = ch->band;
3836         u16 channel = ch->hw_value;
3837
3838         if (le16_to_cpu(ctx->staging.channel) == channel && il->band == band)
3839                 return 0;
3840
3841         ctx->staging.channel = cpu_to_le16(channel);
3842         if (band == IEEE80211_BAND_5GHZ)
3843                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3844         else
3845                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3846
3847         il->band = band;
3848
3849         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3850
3851         return 0;
3852 }
3853 EXPORT_SYMBOL(il_set_rxon_channel);
3854
3855 void il_set_flags_for_band(struct il_priv *il,
3856                             struct il_rxon_context *ctx,
3857                             enum ieee80211_band band,
3858                             struct ieee80211_vif *vif)
3859 {
3860         if (band == IEEE80211_BAND_5GHZ) {
3861                 ctx->staging.flags &=
3862                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
3863                       | RXON_FLG_CCK_MSK);
3864                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3865         } else {
3866                 /* Copied from il_post_associate() */
3867                 if (vif && vif->bss_conf.use_short_slot)
3868                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3869                 else
3870                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3871
3872                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3873                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3874                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
3875         }
3876 }
3877 EXPORT_SYMBOL(il_set_flags_for_band);
3878
3879 /*
3880  * initialize rxon structure with default values from eeprom
3881  */
3882 void il_connection_init_rx_config(struct il_priv *il,
3883                                    struct il_rxon_context *ctx)
3884 {
3885         const struct il_channel_info *ch_info;
3886
3887         memset(&ctx->staging, 0, sizeof(ctx->staging));
3888
3889         if (!ctx->vif) {
3890                 ctx->staging.dev_type = ctx->unused_devtype;
3891         } else
3892         switch (ctx->vif->type) {
3893
3894         case NL80211_IFTYPE_STATION:
3895                 ctx->staging.dev_type = ctx->station_devtype;
3896                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3897                 break;
3898
3899         case NL80211_IFTYPE_ADHOC:
3900                 ctx->staging.dev_type = ctx->ibss_devtype;
3901                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3902                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
3903                                                   RXON_FILTER_ACCEPT_GRP_MSK;
3904                 break;
3905
3906         default:
3907                 IL_ERR("Unsupported interface type %d\n",
3908                         ctx->vif->type);
3909                 break;
3910         }
3911
3912 #if 0
3913         /* TODO:  Figure out when short_preamble would be set and cache from
3914          * that */
3915         if (!hw_to_local(il->hw)->short_preamble)
3916                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3917         else
3918                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3919 #endif
3920
3921         ch_info = il_get_channel_info(il, il->band,
3922                                        le16_to_cpu(ctx->active.channel));
3923
3924         if (!ch_info)
3925                 ch_info = &il->channel_info[0];
3926
3927         ctx->staging.channel = cpu_to_le16(ch_info->channel);
3928         il->band = ch_info->band;
3929
3930         il_set_flags_for_band(il, ctx, il->band, ctx->vif);
3931
3932         ctx->staging.ofdm_basic_rates =
3933             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3934         ctx->staging.cck_basic_rates =
3935             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3936
3937         /* clear both MIX and PURE40 mode flag */
3938         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
3939                                         RXON_FLG_CHANNEL_MODE_PURE_40);
3940         if (ctx->vif)
3941                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
3942
3943         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
3944         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
3945 }
3946 EXPORT_SYMBOL(il_connection_init_rx_config);
3947
3948 void il_set_rate(struct il_priv *il)
3949 {
3950         const struct ieee80211_supported_band *hw = NULL;
3951         struct ieee80211_rate *rate;
3952         int i;
3953
3954         hw = il_get_hw_mode(il, il->band);
3955         if (!hw) {
3956                 IL_ERR("Failed to set rate: unable to get hw mode\n");
3957                 return;
3958         }
3959
3960         il->active_rate = 0;
3961
3962         for (i = 0; i < hw->n_bitrates; i++) {
3963                 rate = &(hw->bitrates[i]);
3964                 if (rate->hw_value < RATE_COUNT_LEGACY)
3965                         il->active_rate |= (1 << rate->hw_value);
3966         }
3967
3968         D_RATE("Set active_rate = %0x\n", il->active_rate);
3969
3970         il->ctx.staging.cck_basic_rates =
3971                     (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3972
3973         il->ctx.staging.ofdm_basic_rates =
3974                    (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3975 }
3976 EXPORT_SYMBOL(il_set_rate);
3977
3978 void il_chswitch_done(struct il_priv *il, bool is_success)
3979 {
3980         struct il_rxon_context *ctx = &il->ctx;
3981
3982         if (test_bit(S_EXIT_PENDING, &il->status))
3983                 return;
3984
3985         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
3986                 ieee80211_chswitch_done(ctx->vif, is_success);
3987 }
3988 EXPORT_SYMBOL(il_chswitch_done);
3989
3990 void il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
3991 {
3992         struct il_rx_pkt *pkt = rxb_addr(rxb);
3993         struct il_csa_notification *csa = &(pkt->u.csa_notif);
3994
3995         struct il_rxon_context *ctx = &il->ctx;
3996         struct il_rxon_cmd *rxon = (void *)&ctx->active;
3997
3998         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
3999                 return;
4000
4001         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4002                 rxon->channel = csa->channel;
4003                 ctx->staging.channel = csa->channel;
4004                 D_11H("CSA notif: channel %d\n",
4005                               le16_to_cpu(csa->channel));
4006                 il_chswitch_done(il, true);
4007         } else {
4008                 IL_ERR("CSA notif (fail) : channel %d\n",
4009                         le16_to_cpu(csa->channel));
4010                 il_chswitch_done(il, false);
4011         }
4012 }
4013 EXPORT_SYMBOL(il_hdl_csa);
4014
4015 #ifdef CONFIG_IWLEGACY_DEBUG
4016 void il_print_rx_config_cmd(struct il_priv *il,
4017                              struct il_rxon_context *ctx)
4018 {
4019         struct il_rxon_cmd *rxon = &ctx->staging;
4020
4021         D_RADIO("RX CONFIG:\n");
4022         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4023         D_RADIO("u16 channel: 0x%x\n",
4024                                 le16_to_cpu(rxon->channel));
4025         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4026         D_RADIO("u32 filter_flags: 0x%08x\n",
4027                                 le32_to_cpu(rxon->filter_flags));
4028         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4029         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4030                         rxon->ofdm_basic_rates);
4031         D_RADIO("u8 cck_basic_rates: 0x%02x\n",
4032                                 rxon->cck_basic_rates);
4033         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4034         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4035         D_RADIO("u16 assoc_id: 0x%x\n",
4036                                 le16_to_cpu(rxon->assoc_id));
4037 }
4038 EXPORT_SYMBOL(il_print_rx_config_cmd);
4039 #endif
4040 /**
4041  * il_irq_handle_error - called for HW or SW error interrupt from card
4042  */
4043 void il_irq_handle_error(struct il_priv *il)
4044 {
4045         /* Set the FW error flag -- cleared on il_down */
4046         set_bit(S_FW_ERROR, &il->status);
4047
4048         /* Cancel currently queued command. */
4049         clear_bit(S_HCMD_ACTIVE, &il->status);
4050
4051         IL_ERR("Loaded firmware version: %s\n",
4052                 il->hw->wiphy->fw_version);
4053
4054         il->cfg->ops->lib->dump_nic_error_log(il);
4055         if (il->cfg->ops->lib->dump_fh)
4056                 il->cfg->ops->lib->dump_fh(il, NULL, false);
4057 #ifdef CONFIG_IWLEGACY_DEBUG
4058         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4059                 il_print_rx_config_cmd(il,
4060                                         &il->ctx);
4061 #endif
4062
4063         wake_up(&il->wait_command_queue);
4064
4065         /* Keep the restart process from trying to send host
4066          * commands by clearing the INIT status bit */
4067         clear_bit(S_READY, &il->status);
4068
4069         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4070                 IL_DBG(IL_DL_FW_ERRORS,
4071                           "Restarting adapter due to uCode error.\n");
4072
4073                 if (il->cfg->mod_params->restart_fw)
4074                         queue_work(il->workqueue, &il->restart);
4075         }
4076 }
4077 EXPORT_SYMBOL(il_irq_handle_error);
4078
4079 static int il_apm_stop_master(struct il_priv *il)
4080 {
4081         int ret = 0;
4082
4083         /* stop device's busmaster DMA activity */
4084         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4085
4086         ret = _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4087                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4088         if (ret)
4089                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4090
4091         D_INFO("stop master\n");
4092
4093         return ret;
4094 }
4095
4096 void il_apm_stop(struct il_priv *il)
4097 {
4098         D_INFO("Stop card, put in low power state\n");
4099
4100         /* Stop device's DMA activity */
4101         il_apm_stop_master(il);
4102
4103         /* Reset the entire device */
4104         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4105
4106         udelay(10);
4107
4108         /*
4109          * Clear "initialization complete" bit to move adapter from
4110          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4111          */
4112         il_clear_bit(il, CSR_GP_CNTRL,
4113                                 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4114 }
4115 EXPORT_SYMBOL(il_apm_stop);
4116
4117
4118 /*
4119  * Start up NIC's basic functionality after it has been reset
4120  * (e.g. after platform boot, or shutdown via il_apm_stop())
4121  * NOTE:  This does not load uCode nor start the embedded processor
4122  */
4123 int il_apm_init(struct il_priv *il)
4124 {
4125         int ret = 0;
4126         u16 lctl;
4127
4128         D_INFO("Init card's basic functions\n");
4129
4130         /*
4131          * Use "set_bit" below rather than "write", to preserve any hardware
4132          * bits already set by default after reset.
4133          */
4134
4135         /* Disable L0S exit timer (platform NMI Work/Around) */
4136         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4137                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4138
4139         /*
4140          * Disable L0s without affecting L1;
4141          *  don't wait for ICH L0s (ICH bug W/A)
4142          */
4143         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4144                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4145
4146         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4147         il_set_bit(il, CSR_DBG_HPET_MEM_REG,
4148                                         CSR_DBG_HPET_MEM_REG_VAL);
4149
4150         /*
4151          * Enable HAP INTA (interrupt from management bus) to
4152          * wake device's PCI Express link L1a -> L0s
4153          * NOTE:  This is no-op for 3945 (non-existent bit)
4154          */
4155         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4156                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4157
4158         /*
4159          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4160          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4161          * If so (likely), disable L0S, so device moves directly L0->L1;
4162          *    costs negligible amount of power savings.
4163          * If not (unlikely), enable L0S, so there is at least some
4164          *    power savings, even without L1.
4165          */
4166         if (il->cfg->base_params->set_l0s) {
4167                 lctl = il_pcie_link_ctl(il);
4168                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4169                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4170                         /* L1-ASPM enabled; disable(!) L0S  */
4171                         il_set_bit(il, CSR_GIO_REG,
4172                                         CSR_GIO_REG_VAL_L0S_ENABLED);
4173                         D_POWER("L1 Enabled; Disabling L0S\n");
4174                 } else {
4175                         /* L1-ASPM disabled; enable(!) L0S */
4176                         il_clear_bit(il, CSR_GIO_REG,
4177                                         CSR_GIO_REG_VAL_L0S_ENABLED);
4178                         D_POWER("L1 Disabled; Enabling L0S\n");
4179                 }
4180         }
4181
4182         /* Configure analog phase-lock-loop before activating to D0A */
4183         if (il->cfg->base_params->pll_cfg_val)
4184                 il_set_bit(il, CSR_ANA_PLL_CFG,
4185                             il->cfg->base_params->pll_cfg_val);
4186
4187         /*
4188          * Set "initialization complete" bit to move adapter from
4189          * D0U* --> D0A* (powered-up active) state.
4190          */
4191         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4192
4193         /*
4194          * Wait for clock stabilization; once stabilized, access to
4195          * device-internal resources is supported, e.g. il_wr_prph()
4196          * and accesses to uCode SRAM.
4197          */
4198         ret = _il_poll_bit(il, CSR_GP_CNTRL,
4199                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4200                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4201         if (ret < 0) {
4202                 D_INFO("Failed to init the card\n");
4203                 goto out;
4204         }
4205
4206         /*
4207          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4208          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4209          *
4210          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4211          * do not disable clocks.  This preserves any hardware bits already
4212          * set by default in "CLK_CTRL_REG" after reset.
4213          */
4214         if (il->cfg->base_params->use_bsm)
4215                 il_wr_prph(il, APMG_CLK_EN_REG,
4216                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4217         else
4218                 il_wr_prph(il, APMG_CLK_EN_REG,
4219                         APMG_CLK_VAL_DMA_CLK_RQT);
4220         udelay(20);
4221
4222         /* Disable L1-Active */
4223         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4224                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4225
4226 out:
4227         return ret;
4228 }
4229 EXPORT_SYMBOL(il_apm_init);
4230
4231
4232 int il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4233 {
4234         int ret;
4235         s8 prev_tx_power;
4236         bool defer;
4237         struct il_rxon_context *ctx = &il->ctx;
4238
4239         lockdep_assert_held(&il->mutex);
4240
4241         if (il->tx_power_user_lmt == tx_power && !force)
4242                 return 0;
4243
4244         if (!il->cfg->ops->lib->send_tx_power)
4245                 return -EOPNOTSUPP;
4246
4247         /* 0 dBm mean 1 milliwatt */
4248         if (tx_power < 0) {
4249                 IL_WARN(
4250                          "Requested user TXPOWER %d below 1 mW.\n",
4251                          tx_power);
4252                 return -EINVAL;
4253         }
4254
4255         if (tx_power > il->tx_power_device_lmt) {
4256                 IL_WARN(
4257                         "Requested user TXPOWER %d above upper limit %d.\n",
4258                          tx_power, il->tx_power_device_lmt);
4259                 return -EINVAL;
4260         }
4261
4262         if (!il_is_ready_rf(il))
4263                 return -EIO;
4264
4265         /* scan complete and commit_rxon use tx_power_next value,
4266          * it always need to be updated for newest request */
4267         il->tx_power_next = tx_power;
4268
4269         /* do not set tx power when scanning or channel changing */
4270         defer = test_bit(S_SCANNING, &il->status) ||
4271                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
4272         if (defer && !force) {
4273                 D_INFO("Deferring tx power set\n");
4274                 return 0;
4275         }
4276
4277         prev_tx_power = il->tx_power_user_lmt;
4278         il->tx_power_user_lmt = tx_power;
4279
4280         ret = il->cfg->ops->lib->send_tx_power(il);
4281
4282         /* if fail to set tx_power, restore the orig. tx power */
4283         if (ret) {
4284                 il->tx_power_user_lmt = prev_tx_power;
4285                 il->tx_power_next = prev_tx_power;
4286         }
4287         return ret;
4288 }
4289 EXPORT_SYMBOL(il_set_tx_power);
4290
4291 void il_send_bt_config(struct il_priv *il)
4292 {
4293         struct il_bt_cmd bt_cmd = {
4294                 .lead_time = BT_LEAD_TIME_DEF,
4295                 .max_kill = BT_MAX_KILL_DEF,
4296                 .kill_ack_mask = 0,
4297                 .kill_cts_mask = 0,
4298         };
4299
4300         if (!bt_coex_active)
4301                 bt_cmd.flags = BT_COEX_DISABLE;
4302         else
4303                 bt_cmd.flags = BT_COEX_ENABLE;
4304
4305         D_INFO("BT coex %s\n",
4306                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4307
4308         if (il_send_cmd_pdu(il, C_BT_CONFIG,
4309                              sizeof(struct il_bt_cmd), &bt_cmd))
4310                 IL_ERR("failed to send BT Coex Config\n");
4311 }
4312 EXPORT_SYMBOL(il_send_bt_config);
4313
4314 int il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4315 {
4316         struct il_stats_cmd stats_cmd = {
4317                 .configuration_flags =
4318                         clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4319         };
4320
4321         if (flags & CMD_ASYNC)
4322                 return il_send_cmd_pdu_async(il, C_STATS,
4323                                         sizeof(struct il_stats_cmd),
4324                                         &stats_cmd, NULL);
4325         else
4326                 return il_send_cmd_pdu(il, C_STATS,
4327                                         sizeof(struct il_stats_cmd),
4328                                         &stats_cmd);
4329 }
4330 EXPORT_SYMBOL(il_send_stats_request);
4331
4332 void il_hdl_pm_sleep(struct il_priv *il,
4333                            struct il_rx_buf *rxb)
4334 {
4335 #ifdef CONFIG_IWLEGACY_DEBUG
4336         struct il_rx_pkt *pkt = rxb_addr(rxb);
4337         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4338         D_RX("sleep mode: %d, src: %d\n",
4339                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4340 #endif
4341 }
4342 EXPORT_SYMBOL(il_hdl_pm_sleep);
4343
4344 void il_hdl_pm_debug_stats(struct il_priv *il,
4345                                       struct il_rx_buf *rxb)
4346 {
4347         struct il_rx_pkt *pkt = rxb_addr(rxb);
4348         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4349         D_RADIO("Dumping %d bytes of unhandled "
4350                         "notification for %s:\n", len,
4351                         il_get_cmd_string(pkt->hdr.cmd));
4352         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4353 }
4354 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4355
4356 void il_hdl_error(struct il_priv *il,
4357                         struct il_rx_buf *rxb)
4358 {
4359         struct il_rx_pkt *pkt = rxb_addr(rxb);
4360
4361         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4362                 "seq 0x%04X ser 0x%08X\n",
4363                 le32_to_cpu(pkt->u.err_resp.error_type),
4364                 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4365                 pkt->u.err_resp.cmd_id,
4366                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4367                 le32_to_cpu(pkt->u.err_resp.error_info));
4368 }
4369 EXPORT_SYMBOL(il_hdl_error);
4370
4371 void il_clear_isr_stats(struct il_priv *il)
4372 {
4373         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4374 }
4375
4376 int il_mac_conf_tx(struct ieee80211_hw *hw,
4377                            struct ieee80211_vif *vif, u16 queue,
4378                            const struct ieee80211_tx_queue_params *params)
4379 {
4380         struct il_priv *il = hw->priv;
4381         unsigned long flags;
4382         int q;
4383
4384         D_MAC80211("enter\n");
4385
4386         if (!il_is_ready_rf(il)) {
4387                 D_MAC80211("leave - RF not ready\n");
4388                 return -EIO;
4389         }
4390
4391         if (queue >= AC_NUM) {
4392                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4393                 return 0;
4394         }
4395
4396         q = AC_NUM - 1 - queue;
4397
4398         spin_lock_irqsave(&il->lock, flags);
4399
4400         il->ctx.qos_data.def_qos_parm.ac[q].cw_min =
4401                         cpu_to_le16(params->cw_min);
4402         il->ctx.qos_data.def_qos_parm.ac[q].cw_max =
4403                         cpu_to_le16(params->cw_max);
4404         il->ctx.qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4405         il->ctx.qos_data.def_qos_parm.ac[q].edca_txop =
4406                                 cpu_to_le16((params->txop * 32));
4407
4408         il->ctx.qos_data.def_qos_parm.ac[q].reserved1 = 0;
4409
4410         spin_unlock_irqrestore(&il->lock, flags);
4411
4412         D_MAC80211("leave\n");
4413         return 0;
4414 }
4415 EXPORT_SYMBOL(il_mac_conf_tx);
4416
4417 int il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4418 {
4419         struct il_priv *il = hw->priv;
4420
4421         return il->ibss_manager == IL_IBSS_MANAGER;
4422 }
4423 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4424
4425 static int
4426 il_set_mode(struct il_priv *il, struct il_rxon_context *ctx)
4427 {
4428         il_connection_init_rx_config(il, ctx);
4429
4430         if (il->cfg->ops->hcmd->set_rxon_chain)
4431                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
4432
4433         return il_commit_rxon(il, ctx);
4434 }
4435
4436 static int il_setup_interface(struct il_priv *il,
4437                                struct il_rxon_context *ctx)
4438 {
4439         struct ieee80211_vif *vif = ctx->vif;
4440         int err;
4441
4442         lockdep_assert_held(&il->mutex);
4443
4444         /*
4445          * This variable will be correct only when there's just
4446          * a single context, but all code using it is for hardware
4447          * that supports only one context.
4448          */
4449         il->iw_mode = vif->type;
4450
4451         ctx->is_active = true;
4452
4453         err = il_set_mode(il, ctx);
4454         if (err) {
4455                 if (!ctx->always_active)
4456                         ctx->is_active = false;
4457                 return err;
4458         }
4459
4460         return 0;
4461 }
4462
4463 int
4464 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4465 {
4466         struct il_priv *il = hw->priv;
4467         struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
4468         int err;
4469         u32 modes;
4470
4471         D_MAC80211("enter: type %d, addr %pM\n",
4472                            vif->type, vif->addr);
4473
4474         mutex_lock(&il->mutex);
4475
4476         if (!il_is_ready_rf(il)) {
4477                 IL_WARN("Try to add interface when device not ready\n");
4478                 err = -EINVAL;
4479                 goto out;
4480         }
4481
4482
4483         /* check if busy context is exclusive */
4484         if (il->ctx.vif &&
4485             (il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type))) {
4486                 err = -EINVAL;
4487                 goto out;
4488         }
4489
4490         modes = il->ctx.interface_modes | il->ctx.exclusive_interface_modes;
4491         if (!(modes & BIT(vif->type))) {
4492                 err = -EOPNOTSUPP;
4493                 goto out;
4494         }
4495
4496         vif_priv->ctx = &il->ctx;
4497         il->ctx.vif = vif;
4498
4499         err = il_setup_interface(il, &il->ctx);
4500         if (err) {
4501                 il->ctx.vif = NULL;
4502                 il->iw_mode = NL80211_IFTYPE_STATION;
4503         }
4504
4505  out:
4506         mutex_unlock(&il->mutex);
4507
4508         D_MAC80211("leave\n");
4509         return err;
4510 }
4511 EXPORT_SYMBOL(il_mac_add_interface);
4512
4513 static void il_teardown_interface(struct il_priv *il,
4514                                    struct ieee80211_vif *vif,
4515                                    bool mode_change)
4516 {
4517         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4518
4519         lockdep_assert_held(&il->mutex);
4520
4521         if (il->scan_vif == vif) {
4522                 il_scan_cancel_timeout(il, 200);
4523                 il_force_scan_end(il);
4524         }
4525
4526         if (!mode_change) {
4527                 il_set_mode(il, ctx);
4528                 if (!ctx->always_active)
4529                         ctx->is_active = false;
4530         }
4531 }
4532
4533 void il_mac_remove_interface(struct ieee80211_hw *hw,
4534                               struct ieee80211_vif *vif)
4535 {
4536         struct il_priv *il = hw->priv;
4537         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4538
4539         D_MAC80211("enter\n");
4540
4541         mutex_lock(&il->mutex);
4542
4543         WARN_ON(ctx->vif != vif);
4544         ctx->vif = NULL;
4545
4546         il_teardown_interface(il, vif, false);
4547
4548         memset(il->bssid, 0, ETH_ALEN);
4549         mutex_unlock(&il->mutex);
4550
4551         D_MAC80211("leave\n");
4552
4553 }
4554 EXPORT_SYMBOL(il_mac_remove_interface);
4555
4556 int il_alloc_txq_mem(struct il_priv *il)
4557 {
4558         if (!il->txq)
4559                 il->txq = kzalloc(
4560                         sizeof(struct il_tx_queue) *
4561                                 il->cfg->base_params->num_of_queues,
4562                         GFP_KERNEL);
4563         if (!il->txq) {
4564                 IL_ERR("Not enough memory for txq\n");
4565                 return -ENOMEM;
4566         }
4567         return 0;
4568 }
4569 EXPORT_SYMBOL(il_alloc_txq_mem);
4570
4571 void il_txq_mem(struct il_priv *il)
4572 {
4573         kfree(il->txq);
4574         il->txq = NULL;
4575 }
4576 EXPORT_SYMBOL(il_txq_mem);
4577
4578 #ifdef CONFIG_IWLEGACY_DEBUGFS
4579
4580 #define IL_TRAFFIC_DUMP_SIZE    (IL_TRAFFIC_ENTRY_SIZE * IL_TRAFFIC_ENTRIES)
4581
4582 void il_reset_traffic_log(struct il_priv *il)
4583 {
4584         il->tx_traffic_idx = 0;
4585         il->rx_traffic_idx = 0;
4586         if (il->tx_traffic)
4587                 memset(il->tx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4588         if (il->rx_traffic)
4589                 memset(il->rx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4590 }
4591
4592 int il_alloc_traffic_mem(struct il_priv *il)
4593 {
4594         u32 traffic_size = IL_TRAFFIC_DUMP_SIZE;
4595
4596         if (il_debug_level & IL_DL_TX) {
4597                 if (!il->tx_traffic) {
4598                         il->tx_traffic =
4599                                 kzalloc(traffic_size, GFP_KERNEL);
4600                         if (!il->tx_traffic)
4601                                 return -ENOMEM;
4602                 }
4603         }
4604         if (il_debug_level & IL_DL_RX) {
4605                 if (!il->rx_traffic) {
4606                         il->rx_traffic =
4607                                 kzalloc(traffic_size, GFP_KERNEL);
4608                         if (!il->rx_traffic)
4609                                 return -ENOMEM;
4610                 }
4611         }
4612         il_reset_traffic_log(il);
4613         return 0;
4614 }
4615 EXPORT_SYMBOL(il_alloc_traffic_mem);
4616
4617 void il_free_traffic_mem(struct il_priv *il)
4618 {
4619         kfree(il->tx_traffic);
4620         il->tx_traffic = NULL;
4621
4622         kfree(il->rx_traffic);
4623         il->rx_traffic = NULL;
4624 }
4625 EXPORT_SYMBOL(il_free_traffic_mem);
4626
4627 void il_dbg_log_tx_data_frame(struct il_priv *il,
4628                       u16 length, struct ieee80211_hdr *header)
4629 {
4630         __le16 fc;
4631         u16 len;
4632
4633         if (likely(!(il_debug_level & IL_DL_TX)))
4634                 return;
4635
4636         if (!il->tx_traffic)
4637                 return;
4638
4639         fc = header->frame_control;
4640         if (ieee80211_is_data(fc)) {
4641                 len = (length > IL_TRAFFIC_ENTRY_SIZE)
4642                        ? IL_TRAFFIC_ENTRY_SIZE : length;
4643                 memcpy((il->tx_traffic +
4644                        (il->tx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)),
4645                        header, len);
4646                 il->tx_traffic_idx =
4647                         (il->tx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4648         }
4649 }
4650 EXPORT_SYMBOL(il_dbg_log_tx_data_frame);
4651
4652 void il_dbg_log_rx_data_frame(struct il_priv *il,
4653                       u16 length, struct ieee80211_hdr *header)
4654 {
4655         __le16 fc;
4656         u16 len;
4657
4658         if (likely(!(il_debug_level & IL_DL_RX)))
4659                 return;
4660
4661         if (!il->rx_traffic)
4662                 return;
4663
4664         fc = header->frame_control;
4665         if (ieee80211_is_data(fc)) {
4666                 len = (length > IL_TRAFFIC_ENTRY_SIZE)
4667                        ? IL_TRAFFIC_ENTRY_SIZE : length;
4668                 memcpy((il->rx_traffic +
4669                        (il->rx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)),
4670                        header, len);
4671                 il->rx_traffic_idx =
4672                         (il->rx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4673         }
4674 }
4675 EXPORT_SYMBOL(il_dbg_log_rx_data_frame);
4676
4677 const char *il_get_mgmt_string(int cmd)
4678 {
4679         switch (cmd) {
4680                 IL_CMD(MANAGEMENT_ASSOC_REQ);
4681                 IL_CMD(MANAGEMENT_ASSOC_RESP);
4682                 IL_CMD(MANAGEMENT_REASSOC_REQ);
4683                 IL_CMD(MANAGEMENT_REASSOC_RESP);
4684                 IL_CMD(MANAGEMENT_PROBE_REQ);
4685                 IL_CMD(MANAGEMENT_PROBE_RESP);
4686                 IL_CMD(MANAGEMENT_BEACON);
4687                 IL_CMD(MANAGEMENT_ATIM);
4688                 IL_CMD(MANAGEMENT_DISASSOC);
4689                 IL_CMD(MANAGEMENT_AUTH);
4690                 IL_CMD(MANAGEMENT_DEAUTH);
4691                 IL_CMD(MANAGEMENT_ACTION);
4692         default:
4693                 return "UNKNOWN";
4694
4695         }
4696 }
4697
4698 const char *il_get_ctrl_string(int cmd)
4699 {
4700         switch (cmd) {
4701                 IL_CMD(CONTROL_BACK_REQ);
4702                 IL_CMD(CONTROL_BACK);
4703                 IL_CMD(CONTROL_PSPOLL);
4704                 IL_CMD(CONTROL_RTS);
4705                 IL_CMD(CONTROL_CTS);
4706                 IL_CMD(CONTROL_ACK);
4707                 IL_CMD(CONTROL_CFEND);
4708                 IL_CMD(CONTROL_CFENDACK);
4709         default:
4710                 return "UNKNOWN";
4711
4712         }
4713 }
4714
4715 void il_clear_traffic_stats(struct il_priv *il)
4716 {
4717         memset(&il->tx_stats, 0, sizeof(struct traffic_stats));
4718         memset(&il->rx_stats, 0, sizeof(struct traffic_stats));
4719 }
4720
4721 /*
4722  * if CONFIG_IWLEGACY_DEBUGFS defined,
4723  * il_update_stats function will
4724  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
4725  * Use debugFs to display the rx/rx_stats
4726  * if CONFIG_IWLEGACY_DEBUGFS not being defined, then no MGMT and CTRL
4727  * information will be recorded, but DATA pkt still will be recorded
4728  * for the reason of il_led.c need to control the led blinking based on
4729  * number of tx and rx data.
4730  *
4731  */
4732 void
4733 il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
4734 {
4735         struct traffic_stats    *stats;
4736
4737         if (is_tx)
4738                 stats = &il->tx_stats;
4739         else
4740                 stats = &il->rx_stats;
4741
4742         if (ieee80211_is_mgmt(fc)) {
4743                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4744                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
4745                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
4746                         break;
4747                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
4748                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
4749                         break;
4750                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
4751                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
4752                         break;
4753                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
4754                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
4755                         break;
4756                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
4757                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
4758                         break;
4759                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
4760                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
4761                         break;
4762                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
4763                         stats->mgmt[MANAGEMENT_BEACON]++;
4764                         break;
4765                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
4766                         stats->mgmt[MANAGEMENT_ATIM]++;
4767                         break;
4768                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
4769                         stats->mgmt[MANAGEMENT_DISASSOC]++;
4770                         break;
4771                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
4772                         stats->mgmt[MANAGEMENT_AUTH]++;
4773                         break;
4774                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
4775                         stats->mgmt[MANAGEMENT_DEAUTH]++;
4776                         break;
4777                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
4778                         stats->mgmt[MANAGEMENT_ACTION]++;
4779                         break;
4780                 }
4781         } else if (ieee80211_is_ctl(fc)) {
4782                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4783                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
4784                         stats->ctrl[CONTROL_BACK_REQ]++;
4785                         break;
4786                 case cpu_to_le16(IEEE80211_STYPE_BACK):
4787                         stats->ctrl[CONTROL_BACK]++;
4788                         break;
4789                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
4790                         stats->ctrl[CONTROL_PSPOLL]++;
4791                         break;
4792                 case cpu_to_le16(IEEE80211_STYPE_RTS):
4793                         stats->ctrl[CONTROL_RTS]++;
4794                         break;
4795                 case cpu_to_le16(IEEE80211_STYPE_CTS):
4796                         stats->ctrl[CONTROL_CTS]++;
4797                         break;
4798                 case cpu_to_le16(IEEE80211_STYPE_ACK):
4799                         stats->ctrl[CONTROL_ACK]++;
4800                         break;
4801                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
4802                         stats->ctrl[CONTROL_CFEND]++;
4803                         break;
4804                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
4805                         stats->ctrl[CONTROL_CFENDACK]++;
4806                         break;
4807                 }
4808         } else {
4809                 /* data */
4810                 stats->data_cnt++;
4811                 stats->data_bytes += len;
4812         }
4813 }
4814 EXPORT_SYMBOL(il_update_stats);
4815 #endif
4816
4817 int il_force_reset(struct il_priv *il, bool external)
4818 {
4819         struct il_force_reset *force_reset;
4820
4821         if (test_bit(S_EXIT_PENDING, &il->status))
4822                 return -EINVAL;
4823
4824         force_reset = &il->force_reset;
4825         force_reset->reset_request_count++;
4826         if (!external) {
4827                 if (force_reset->last_force_reset_jiffies &&
4828                     time_after(force_reset->last_force_reset_jiffies +
4829                     force_reset->reset_duration, jiffies)) {
4830                         D_INFO("force reset rejected\n");
4831                         force_reset->reset_reject_count++;
4832                         return -EAGAIN;
4833                 }
4834         }
4835         force_reset->reset_success_count++;
4836         force_reset->last_force_reset_jiffies = jiffies;
4837
4838         /*
4839          * if the request is from external(ex: debugfs),
4840          * then always perform the request in regardless the module
4841          * parameter setting
4842          * if the request is from internal (uCode error or driver
4843          * detect failure), then fw_restart module parameter
4844          * need to be check before performing firmware reload
4845          */
4846
4847         if (!external && !il->cfg->mod_params->restart_fw) {
4848                 D_INFO("Cancel firmware reload based on "
4849                                "module parameter setting\n");
4850                 return 0;
4851         }
4852
4853         IL_ERR("On demand firmware reload\n");
4854
4855         /* Set the FW error flag -- cleared on il_down */
4856         set_bit(S_FW_ERROR, &il->status);
4857         wake_up(&il->wait_command_queue);
4858         /*
4859          * Keep the restart process from trying to send host
4860          * commands by clearing the INIT status bit
4861          */
4862         clear_bit(S_READY, &il->status);
4863         queue_work(il->workqueue, &il->restart);
4864
4865         return 0;
4866 }
4867
4868 int
4869 il_mac_change_interface(struct ieee80211_hw *hw,
4870                         struct ieee80211_vif *vif,
4871                         enum nl80211_iftype newtype, bool newp2p)
4872 {
4873         struct il_priv *il = hw->priv;
4874         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4875         u32 modes;
4876         int err;
4877
4878         newtype = ieee80211_iftype_p2p(newtype, newp2p);
4879
4880         mutex_lock(&il->mutex);
4881
4882         if (!ctx->vif || !il_is_ready_rf(il)) {
4883                 /*
4884                  * Huh? But wait ... this can maybe happen when
4885                  * we're in the middle of a firmware restart!
4886                  */
4887                 err = -EBUSY;
4888                 goto out;
4889         }
4890
4891         modes = ctx->interface_modes | ctx->exclusive_interface_modes;
4892         if (!(modes & BIT(newtype))) {
4893                 err = -EOPNOTSUPP;
4894                 goto out;
4895         }
4896
4897         if ((il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type)) ||
4898             (il->ctx.exclusive_interface_modes & BIT(newtype))) {
4899                 err = -EINVAL;
4900                 goto out;
4901         }
4902
4903         /* success */
4904         il_teardown_interface(il, vif, true);
4905         vif->type = newtype;
4906         vif->p2p = newp2p;
4907         err = il_setup_interface(il, ctx);
4908         WARN_ON(err);
4909         /*
4910          * We've switched internally, but submitting to the
4911          * device may have failed for some reason. Mask this
4912          * error, because otherwise mac80211 will not switch
4913          * (and set the interface type back) and we'll be
4914          * out of sync with it.
4915          */
4916         err = 0;
4917
4918  out:
4919         mutex_unlock(&il->mutex);
4920         return err;
4921 }
4922 EXPORT_SYMBOL(il_mac_change_interface);
4923
4924 /*
4925  * On every watchdog tick we check (latest) time stamp. If it does not
4926  * change during timeout period and queue is not empty we reset firmware.
4927  */
4928 static int il_check_stuck_queue(struct il_priv *il, int cnt)
4929 {
4930         struct il_tx_queue *txq = &il->txq[cnt];
4931         struct il_queue *q = &txq->q;
4932         unsigned long timeout;
4933         int ret;
4934
4935         if (q->read_ptr == q->write_ptr) {
4936                 txq->time_stamp = jiffies;
4937                 return 0;
4938         }
4939
4940         timeout = txq->time_stamp +
4941                   msecs_to_jiffies(il->cfg->base_params->wd_timeout);
4942
4943         if (time_after(jiffies, timeout)) {
4944                 IL_ERR("Queue %d stuck for %u ms.\n",
4945                                 q->id, il->cfg->base_params->wd_timeout);
4946                 ret = il_force_reset(il, false);
4947                 return (ret == -EAGAIN) ? 0 : 1;
4948         }
4949
4950         return 0;
4951 }
4952
4953 /*
4954  * Making watchdog tick be a quarter of timeout assure we will
4955  * discover the queue hung between timeout and 1.25*timeout
4956  */
4957 #define IL_WD_TICK(timeout) ((timeout) / 4)
4958
4959 /*
4960  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4961  * we reset the firmware. If everything is fine just rearm the timer.
4962  */
4963 void il_bg_watchdog(unsigned long data)
4964 {
4965         struct il_priv *il = (struct il_priv *)data;
4966         int cnt;
4967         unsigned long timeout;
4968
4969         if (test_bit(S_EXIT_PENDING, &il->status))
4970                 return;
4971
4972         timeout = il->cfg->base_params->wd_timeout;
4973         if (timeout == 0)
4974                 return;
4975
4976         /* monitor and check for stuck cmd queue */
4977         if (il_check_stuck_queue(il, il->cmd_queue))
4978                 return;
4979
4980         /* monitor and check for other stuck queues */
4981         if (il_is_any_associated(il)) {
4982                 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4983                         /* skip as we already checked the command queue */
4984                         if (cnt == il->cmd_queue)
4985                                 continue;
4986                         if (il_check_stuck_queue(il, cnt))
4987                                 return;
4988                 }
4989         }
4990
4991         mod_timer(&il->watchdog, jiffies +
4992                   msecs_to_jiffies(IL_WD_TICK(timeout)));
4993 }
4994 EXPORT_SYMBOL(il_bg_watchdog);
4995
4996 void il_setup_watchdog(struct il_priv *il)
4997 {
4998         unsigned int timeout = il->cfg->base_params->wd_timeout;
4999
5000         if (timeout)
5001                 mod_timer(&il->watchdog,
5002                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
5003         else
5004                 del_timer(&il->watchdog);
5005 }
5006 EXPORT_SYMBOL(il_setup_watchdog);
5007
5008 /*
5009  * extended beacon time format
5010  * time in usec will be changed into a 32-bit value in extended:internal format
5011  * the extended part is the beacon counts
5012  * the internal part is the time in usec within one beacon interval
5013  */
5014 u32
5015 il_usecs_to_beacons(struct il_priv *il,
5016                                         u32 usec, u32 beacon_interval)
5017 {
5018         u32 quot;
5019         u32 rem;
5020         u32 interval = beacon_interval * TIME_UNIT;
5021
5022         if (!interval || !usec)
5023                 return 0;
5024
5025         quot = (usec / interval) &
5026                 (il_beacon_time_mask_high(il,
5027                 il->hw_params.beacon_time_tsf_bits) >>
5028                 il->hw_params.beacon_time_tsf_bits);
5029         rem = (usec % interval) & il_beacon_time_mask_low(il,
5030                                    il->hw_params.beacon_time_tsf_bits);
5031
5032         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
5033 }
5034 EXPORT_SYMBOL(il_usecs_to_beacons);
5035
5036 /* base is usually what we get from ucode with each received frame,
5037  * the same as HW timer counter counting down
5038  */
5039 __le32 il_add_beacon_time(struct il_priv *il, u32 base,
5040                            u32 addon, u32 beacon_interval)
5041 {
5042         u32 base_low = base & il_beacon_time_mask_low(il,
5043                                         il->hw_params.beacon_time_tsf_bits);
5044         u32 addon_low = addon & il_beacon_time_mask_low(il,
5045                                         il->hw_params.beacon_time_tsf_bits);
5046         u32 interval = beacon_interval * TIME_UNIT;
5047         u32 res = (base & il_beacon_time_mask_high(il,
5048                                 il->hw_params.beacon_time_tsf_bits)) +
5049                                 (addon & il_beacon_time_mask_high(il,
5050                                 il->hw_params.beacon_time_tsf_bits));
5051
5052         if (base_low > addon_low)
5053                 res += base_low - addon_low;
5054         else if (base_low < addon_low) {
5055                 res += interval + base_low - addon_low;
5056                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5057         } else
5058                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5059
5060         return cpu_to_le32(res);
5061 }
5062 EXPORT_SYMBOL(il_add_beacon_time);
5063
5064 #ifdef CONFIG_PM
5065
5066 int il_pci_suspend(struct device *device)
5067 {
5068         struct pci_dev *pdev = to_pci_dev(device);
5069         struct il_priv *il = pci_get_drvdata(pdev);
5070
5071         /*
5072          * This function is called when system goes into suspend state
5073          * mac80211 will call il_mac_stop() from the mac80211 suspend function
5074          * first but since il_mac_stop() has no knowledge of who the caller is,
5075          * it will not call apm_ops.stop() to stop the DMA operation.
5076          * Calling apm_ops.stop here to make sure we stop the DMA.
5077          */
5078         il_apm_stop(il);
5079
5080         return 0;
5081 }
5082 EXPORT_SYMBOL(il_pci_suspend);
5083
5084 int il_pci_resume(struct device *device)
5085 {
5086         struct pci_dev *pdev = to_pci_dev(device);
5087         struct il_priv *il = pci_get_drvdata(pdev);
5088         bool hw_rfkill = false;
5089
5090         /*
5091          * We disable the RETRY_TIMEOUT register (0x41) to keep
5092          * PCI Tx retries from interfering with C3 CPU state.
5093          */
5094         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
5095
5096         il_enable_interrupts(il);
5097
5098         if (!(_il_rd(il, CSR_GP_CNTRL) &
5099                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5100                 hw_rfkill = true;
5101
5102         if (hw_rfkill)
5103                 set_bit(S_RF_KILL_HW, &il->status);
5104         else
5105                 clear_bit(S_RF_KILL_HW, &il->status);
5106
5107         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
5108
5109         return 0;
5110 }
5111 EXPORT_SYMBOL(il_pci_resume);
5112
5113 const struct dev_pm_ops il_pm_ops = {
5114         .suspend = il_pci_suspend,
5115         .resume = il_pci_resume,
5116         .freeze = il_pci_suspend,
5117         .thaw = il_pci_resume,
5118         .poweroff = il_pci_suspend,
5119         .restore = il_pci_resume,
5120 };
5121 EXPORT_SYMBOL(il_pm_ops);
5122
5123 #endif /* CONFIG_PM */
5124
5125 static void
5126 il_update_qos(struct il_priv *il, struct il_rxon_context *ctx)
5127 {
5128         if (test_bit(S_EXIT_PENDING, &il->status))
5129                 return;
5130
5131         if (!ctx->is_active)
5132                 return;
5133
5134         ctx->qos_data.def_qos_parm.qos_flags = 0;
5135
5136         if (ctx->qos_data.qos_active)
5137                 ctx->qos_data.def_qos_parm.qos_flags |=
5138                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5139
5140         if (ctx->ht.enabled)
5141                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5142
5143         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5144                       ctx->qos_data.qos_active,
5145                       ctx->qos_data.def_qos_parm.qos_flags);
5146
5147         il_send_cmd_pdu_async(il, ctx->qos_cmd,
5148                                sizeof(struct il_qosparam_cmd),
5149                                &ctx->qos_data.def_qos_parm, NULL);
5150 }
5151
5152 /**
5153  * il_mac_config - mac80211 config callback
5154  */
5155 int il_mac_config(struct ieee80211_hw *hw, u32 changed)
5156 {
5157         struct il_priv *il = hw->priv;
5158         const struct il_channel_info *ch_info;
5159         struct ieee80211_conf *conf = &hw->conf;
5160         struct ieee80211_channel *channel = conf->channel;
5161         struct il_ht_config *ht_conf = &il->current_ht_config;
5162         struct il_rxon_context *ctx = &il->ctx;
5163         unsigned long flags = 0;
5164         int ret = 0;
5165         u16 ch;
5166         int scan_active = 0;
5167         bool ht_changed = false;
5168
5169         if (WARN_ON(!il->cfg->ops->legacy))
5170                 return -EOPNOTSUPP;
5171
5172         mutex_lock(&il->mutex);
5173
5174         D_MAC80211("enter to channel %d changed 0x%X\n",
5175                                         channel->hw_value, changed);
5176
5177         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5178                 scan_active = 1;
5179                 D_MAC80211("scan active\n");
5180         }
5181
5182         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
5183                        IEEE80211_CONF_CHANGE_CHANNEL)) {
5184                 /* mac80211 uses static for non-HT which is what we want */
5185                 il->current_ht_config.smps = conf->smps_mode;
5186
5187                 /*
5188                  * Recalculate chain counts.
5189                  *
5190                  * If monitor mode is enabled then mac80211 will
5191                  * set up the SM PS mode to OFF if an HT channel is
5192                  * configured.
5193                  */
5194                 if (il->cfg->ops->hcmd->set_rxon_chain)
5195                         il->cfg->ops->hcmd->set_rxon_chain(il, &il->ctx);
5196         }
5197
5198         /* during scanning mac80211 will delay channel setting until
5199          * scan finish with changed = 0
5200          */
5201         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5202
5203                 if (scan_active)
5204                         goto set_ch_out;
5205
5206                 ch = channel->hw_value;
5207                 ch_info = il_get_channel_info(il, channel->band, ch);
5208                 if (!il_is_channel_valid(ch_info)) {
5209                         D_MAC80211("leave - invalid channel\n");
5210                         ret = -EINVAL;
5211                         goto set_ch_out;
5212                 }
5213
5214                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5215                     !il_is_channel_ibss(ch_info)) {
5216                         D_MAC80211("leave - not IBSS channel\n");
5217                         ret = -EINVAL;
5218                         goto set_ch_out;
5219                 }
5220
5221                 spin_lock_irqsave(&il->lock, flags);
5222
5223                 /* Configure HT40 channels */
5224                 if (ctx->ht.enabled != conf_is_ht(conf)) {
5225                         ctx->ht.enabled = conf_is_ht(conf);
5226                         ht_changed = true;
5227                 }
5228                 if (ctx->ht.enabled) {
5229                         if (conf_is_ht40_minus(conf)) {
5230                                 ctx->ht.extension_chan_offset =
5231                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5232                                 ctx->ht.is_40mhz = true;
5233                         } else if (conf_is_ht40_plus(conf)) {
5234                                 ctx->ht.extension_chan_offset =
5235                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5236                                 ctx->ht.is_40mhz = true;
5237                         } else {
5238                                 ctx->ht.extension_chan_offset =
5239                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5240                                 ctx->ht.is_40mhz = false;
5241                         }
5242                 } else
5243                         ctx->ht.is_40mhz = false;
5244
5245                 /*
5246                  * Default to no protection. Protection mode will
5247                  * later be set from BSS config in il_ht_conf
5248                  */
5249                 ctx->ht.protection =
5250                                 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5251
5252                 /* if we are switching from ht to 2.4 clear flags
5253                  * from any ht related info since 2.4 does not
5254                  * support ht */
5255                 if ((le16_to_cpu(ctx->staging.channel) != ch))
5256                         ctx->staging.flags = 0;
5257
5258                 il_set_rxon_channel(il, channel, ctx);
5259                 il_set_rxon_ht(il, ht_conf);
5260
5261                 il_set_flags_for_band(il, ctx, channel->band,
5262                                        ctx->vif);
5263
5264                 spin_unlock_irqrestore(&il->lock, flags);
5265
5266                 if (il->cfg->ops->legacy->update_bcast_stations)
5267                         ret =
5268                         il->cfg->ops->legacy->update_bcast_stations(il);
5269
5270  set_ch_out:
5271                 /* The list of supported rates and rate mask can be different
5272                  * for each band; since the band may have changed, reset
5273                  * the rate mask to what mac80211 lists */
5274                 il_set_rate(il);
5275         }
5276
5277         if (changed & (IEEE80211_CONF_CHANGE_PS |
5278                         IEEE80211_CONF_CHANGE_IDLE)) {
5279                 ret = il_power_update_mode(il, false);
5280                 if (ret)
5281                         D_MAC80211("Error setting sleep level\n");
5282         }
5283
5284         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5285                 D_MAC80211("TX Power old=%d new=%d\n",
5286                         il->tx_power_user_lmt, conf->power_level);
5287
5288                 il_set_tx_power(il, conf->power_level, false);
5289         }
5290
5291         if (!il_is_ready(il)) {
5292                 D_MAC80211("leave - not ready\n");
5293                 goto out;
5294         }
5295
5296         if (scan_active)
5297                 goto out;
5298
5299         if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
5300                 il_commit_rxon(il, ctx);
5301         else
5302                 D_INFO("Not re-sending same RXON configuration.\n");
5303         if (ht_changed)
5304                 il_update_qos(il, ctx);
5305
5306 out:
5307         D_MAC80211("leave\n");
5308         mutex_unlock(&il->mutex);
5309         return ret;
5310 }
5311 EXPORT_SYMBOL(il_mac_config);
5312
5313 void il_mac_reset_tsf(struct ieee80211_hw *hw,
5314                               struct ieee80211_vif *vif)
5315 {
5316         struct il_priv *il = hw->priv;
5317         unsigned long flags;
5318         struct il_rxon_context *ctx = &il->ctx;
5319
5320         if (WARN_ON(!il->cfg->ops->legacy))
5321                 return;
5322
5323         mutex_lock(&il->mutex);
5324         D_MAC80211("enter\n");
5325
5326         spin_lock_irqsave(&il->lock, flags);
5327         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5328         spin_unlock_irqrestore(&il->lock, flags);
5329
5330         spin_lock_irqsave(&il->lock, flags);
5331
5332         /* new association get rid of ibss beacon skb */
5333         if (il->beacon_skb)
5334                 dev_kfree_skb(il->beacon_skb);
5335
5336         il->beacon_skb = NULL;
5337
5338         il->timestamp = 0;
5339
5340         spin_unlock_irqrestore(&il->lock, flags);
5341
5342         il_scan_cancel_timeout(il, 100);
5343         if (!il_is_ready_rf(il)) {
5344                 D_MAC80211("leave - not ready\n");
5345                 mutex_unlock(&il->mutex);
5346                 return;
5347         }
5348
5349         /* we are restarting association process
5350          * clear RXON_FILTER_ASSOC_MSK bit
5351          */
5352         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5353         il_commit_rxon(il, ctx);
5354
5355         il_set_rate(il);
5356
5357         mutex_unlock(&il->mutex);
5358
5359         D_MAC80211("leave\n");
5360 }
5361 EXPORT_SYMBOL(il_mac_reset_tsf);
5362
5363 static void il_ht_conf(struct il_priv *il,
5364                         struct ieee80211_vif *vif)
5365 {
5366         struct il_ht_config *ht_conf = &il->current_ht_config;
5367         struct ieee80211_sta *sta;
5368         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5369         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5370
5371         D_ASSOC("enter:\n");
5372
5373         if (!ctx->ht.enabled)
5374                 return;
5375
5376         ctx->ht.protection =
5377                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5378         ctx->ht.non_gf_sta_present =
5379                 !!(bss_conf->ht_operation_mode &
5380                                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5381
5382         ht_conf->single_chain_sufficient = false;
5383
5384         switch (vif->type) {
5385         case NL80211_IFTYPE_STATION:
5386                 rcu_read_lock();
5387                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5388                 if (sta) {
5389                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5390                         int maxstreams;
5391
5392                         maxstreams = (ht_cap->mcs.tx_params &
5393                               IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5394                                 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5395                         maxstreams += 1;
5396
5397                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5398                             ht_cap->mcs.rx_mask[2] == 0)
5399                                 ht_conf->single_chain_sufficient = true;
5400                         if (maxstreams <= 1)
5401                                 ht_conf->single_chain_sufficient = true;
5402                 } else {
5403                         /*
5404                          * If at all, this can only happen through a race
5405                          * when the AP disconnects us while we're still
5406                          * setting up the connection, in that case mac80211
5407                          * will soon tell us about that.
5408                          */
5409                         ht_conf->single_chain_sufficient = true;
5410                 }
5411                 rcu_read_unlock();
5412                 break;
5413         case NL80211_IFTYPE_ADHOC:
5414                 ht_conf->single_chain_sufficient = true;
5415                 break;
5416         default:
5417                 break;
5418         }
5419
5420         D_ASSOC("leave\n");
5421 }
5422
5423 static inline void il_set_no_assoc(struct il_priv *il,
5424                                     struct ieee80211_vif *vif)
5425 {
5426         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5427
5428         /*
5429          * inform the ucode that there is no longer an
5430          * association and that no more packets should be
5431          * sent
5432          */
5433         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5434         ctx->staging.assoc_id = 0;
5435         il_commit_rxon(il, ctx);
5436 }
5437
5438 static void il_beacon_update(struct ieee80211_hw *hw,
5439                                   struct ieee80211_vif *vif)
5440 {
5441         struct il_priv *il = hw->priv;
5442         unsigned long flags;
5443         __le64 timestamp;
5444         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5445
5446         if (!skb)
5447                 return;
5448
5449         D_MAC80211("enter\n");
5450
5451         lockdep_assert_held(&il->mutex);
5452
5453         if (!il->beacon_ctx) {
5454                 IL_ERR("update beacon but no beacon context!\n");
5455                 dev_kfree_skb(skb);
5456                 return;
5457         }
5458
5459         spin_lock_irqsave(&il->lock, flags);
5460
5461         if (il->beacon_skb)
5462                 dev_kfree_skb(il->beacon_skb);
5463
5464         il->beacon_skb = skb;
5465
5466         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5467         il->timestamp = le64_to_cpu(timestamp);
5468
5469         D_MAC80211("leave\n");
5470         spin_unlock_irqrestore(&il->lock, flags);
5471
5472         if (!il_is_ready_rf(il)) {
5473                 D_MAC80211("leave - RF not ready\n");
5474                 return;
5475         }
5476
5477         il->cfg->ops->legacy->post_associate(il);
5478 }
5479
5480 void il_mac_bss_info_changed(struct ieee80211_hw *hw,
5481                                      struct ieee80211_vif *vif,
5482                                      struct ieee80211_bss_conf *bss_conf,
5483                                      u32 changes)
5484 {
5485         struct il_priv *il = hw->priv;
5486         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5487         int ret;
5488
5489         if (WARN_ON(!il->cfg->ops->legacy))
5490                 return;
5491
5492         D_MAC80211("changes = 0x%X\n", changes);
5493
5494         mutex_lock(&il->mutex);
5495
5496         if (!il_is_alive(il)) {
5497                 mutex_unlock(&il->mutex);
5498                 return;
5499         }
5500
5501         if (changes & BSS_CHANGED_QOS) {
5502                 unsigned long flags;
5503
5504                 spin_lock_irqsave(&il->lock, flags);
5505                 ctx->qos_data.qos_active = bss_conf->qos;
5506                 il_update_qos(il, ctx);
5507                 spin_unlock_irqrestore(&il->lock, flags);
5508         }
5509
5510         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5511                 /*
5512                  * the add_interface code must make sure we only ever
5513                  * have a single interface that could be beaconing at
5514                  * any time.
5515                  */
5516                 if (vif->bss_conf.enable_beacon)
5517                         il->beacon_ctx = ctx;
5518                 else
5519                         il->beacon_ctx = NULL;
5520         }
5521
5522         if (changes & BSS_CHANGED_BSSID) {
5523                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5524
5525                 /*
5526                  * If there is currently a HW scan going on in the
5527                  * background then we need to cancel it else the RXON
5528                  * below/in post_associate will fail.
5529                  */
5530                 if (il_scan_cancel_timeout(il, 100)) {
5531                         IL_WARN(
5532                                 "Aborted scan still in progress after 100ms\n");
5533                         D_MAC80211(
5534                                 "leaving - scan abort failed.\n");
5535                         mutex_unlock(&il->mutex);
5536                         return;
5537                 }
5538
5539                 /* mac80211 only sets assoc when in STATION mode */
5540                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
5541                         memcpy(ctx->staging.bssid_addr,
5542                                bss_conf->bssid, ETH_ALEN);
5543
5544                         /* currently needed in a few places */
5545                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5546                 } else {
5547                         ctx->staging.filter_flags &=
5548                                 ~RXON_FILTER_ASSOC_MSK;
5549                 }
5550
5551         }
5552
5553         /*
5554          * This needs to be after setting the BSSID in case
5555          * mac80211 decides to do both changes at once because
5556          * it will invoke post_associate.
5557          */
5558         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5559                 il_beacon_update(hw, vif);
5560
5561         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5562                 D_MAC80211("ERP_PREAMBLE %d\n",
5563                                    bss_conf->use_short_preamble);
5564                 if (bss_conf->use_short_preamble)
5565                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5566                 else
5567                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5568         }
5569
5570         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5571                 D_MAC80211(
5572                         "ERP_CTS %d\n", bss_conf->use_cts_prot);
5573                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5574                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5575                 else
5576                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5577                 if (bss_conf->use_cts_prot)
5578                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
5579                 else
5580                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5581         }
5582
5583         if (changes & BSS_CHANGED_BASIC_RATES) {
5584                 /* XXX use this information
5585                  *
5586                  * To do that, remove code from il_set_rate() and put something
5587                  * like this here:
5588                  *
5589                 if (A-band)
5590                         ctx->staging.ofdm_basic_rates =
5591                                 bss_conf->basic_rates;
5592                 else
5593                         ctx->staging.ofdm_basic_rates =
5594                                 bss_conf->basic_rates >> 4;
5595                         ctx->staging.cck_basic_rates =
5596                                 bss_conf->basic_rates & 0xF;
5597                  */
5598         }
5599
5600         if (changes & BSS_CHANGED_HT) {
5601                 il_ht_conf(il, vif);
5602
5603                 if (il->cfg->ops->hcmd->set_rxon_chain)
5604                         il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
5605         }
5606
5607         if (changes & BSS_CHANGED_ASSOC) {
5608                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5609                 if (bss_conf->assoc) {
5610                         il->timestamp = bss_conf->timestamp;
5611
5612                         if (!il_is_rfkill(il))
5613                                 il->cfg->ops->legacy->post_associate(il);
5614                 } else
5615                         il_set_no_assoc(il, vif);
5616         }
5617
5618         if (changes && il_is_associated_ctx(ctx) && bss_conf->aid) {
5619                 D_MAC80211("Changes (%#x) while associated\n",
5620                                    changes);
5621                 ret = il_send_rxon_assoc(il, ctx);
5622                 if (!ret) {
5623                         /* Sync active_rxon with latest change. */
5624                         memcpy((void *)&ctx->active,
5625                                 &ctx->staging,
5626                                 sizeof(struct il_rxon_cmd));
5627                 }
5628         }
5629
5630         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5631                 if (vif->bss_conf.enable_beacon) {
5632                         memcpy(ctx->staging.bssid_addr,
5633                                bss_conf->bssid, ETH_ALEN);
5634                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5635                         il->cfg->ops->legacy->config_ap(il);
5636                 } else
5637                         il_set_no_assoc(il, vif);
5638         }
5639
5640         if (changes & BSS_CHANGED_IBSS) {
5641                 ret = il->cfg->ops->legacy->manage_ibss_station(il, vif,
5642                                                         bss_conf->ibss_joined);
5643                 if (ret)
5644                         IL_ERR("failed to %s IBSS station %pM\n",
5645                                 bss_conf->ibss_joined ? "add" : "remove",
5646                                 bss_conf->bssid);
5647         }
5648
5649         mutex_unlock(&il->mutex);
5650
5651         D_MAC80211("leave\n");
5652 }
5653 EXPORT_SYMBOL(il_mac_bss_info_changed);
5654
5655 irqreturn_t il_isr(int irq, void *data)
5656 {
5657         struct il_priv *il = data;
5658         u32 inta, inta_mask;
5659         u32 inta_fh;
5660         unsigned long flags;
5661         if (!il)
5662                 return IRQ_NONE;
5663
5664         spin_lock_irqsave(&il->lock, flags);
5665
5666         /* Disable (but don't clear!) interrupts here to avoid
5667          *    back-to-back ISRs and sporadic interrupts from our NIC.
5668          * If we have something to service, the tasklet will re-enable ints.
5669          * If we *don't* have something, we'll re-enable before leaving here. */
5670         inta_mask = _il_rd(il, CSR_INT_MASK);  /* just for debug */
5671         _il_wr(il, CSR_INT_MASK, 0x00000000);
5672
5673         /* Discover which interrupts are active/pending */
5674         inta = _il_rd(il, CSR_INT);
5675         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5676
5677         /* Ignore interrupt if there's nothing in NIC to service.
5678          * This may be due to IRQ shared with another device,
5679          * or due to sporadic interrupts thrown from our NIC. */
5680         if (!inta && !inta_fh) {
5681                 D_ISR(
5682                         "Ignore interrupt, inta == 0, inta_fh == 0\n");
5683                 goto none;
5684         }
5685
5686         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5687                 /* Hardware disappeared. It might have already raised
5688                  * an interrupt */
5689                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5690                 goto unplugged;
5691         }
5692
5693         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5694                       inta, inta_mask, inta_fh);
5695
5696         inta &= ~CSR_INT_BIT_SCD;
5697
5698         /* il_irq_tasklet() will service interrupts and re-enable them */
5699         if (likely(inta || inta_fh))
5700                 tasklet_schedule(&il->irq_tasklet);
5701
5702 unplugged:
5703         spin_unlock_irqrestore(&il->lock, flags);
5704         return IRQ_HANDLED;
5705
5706 none:
5707         /* re-enable interrupts here since we don't have anything to service. */
5708         /* only Re-enable if disabled by irq */
5709         if (test_bit(S_INT_ENABLED, &il->status))
5710                 il_enable_interrupts(il);
5711         spin_unlock_irqrestore(&il->lock, flags);
5712         return IRQ_NONE;
5713 }
5714 EXPORT_SYMBOL(il_isr);
5715
5716 /*
5717  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5718  *  function.
5719  */
5720 void il_tx_cmd_protection(struct il_priv *il,
5721                                struct ieee80211_tx_info *info,
5722                                __le16 fc, __le32 *tx_flags)
5723 {
5724         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5725                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5726                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5727                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5728
5729                 if (!ieee80211_is_mgmt(fc))
5730                         return;
5731
5732                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5733                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5734                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5735                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5736                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5737                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5738                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5739                         break;
5740                 }
5741         } else if (info->control.rates[0].flags &
5742                    IEEE80211_TX_RC_USE_CTS_PROTECT) {
5743                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5744                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5745                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5746         }
5747 }
5748 EXPORT_SYMBOL(il_tx_cmd_protection);