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