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 =
2790                     kzalloc(sizeof(txq->txb[0]) * TFD_QUEUE_SIZE_MAX,
2791                             GFP_KERNEL);
2792                 if (!txq->txb) {
2793                         IL_ERR("kmalloc for auxiliary BD "
2794                                "structures failed\n");
2795                         goto error;
2796                 }
2797         } else {
2798                 txq->txb = NULL;
2799         }
2800
2801         /* Circular buffer of transmit frame descriptors (TFDs),
2802          * shared with device */
2803         txq->tfds =
2804             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2805         if (!txq->tfds) {
2806                 IL_ERR("pci_alloc_consistent(%zd) failed\n", tfd_sz);
2807                 goto error;
2808         }
2809         txq->q.id = id;
2810
2811         return 0;
2812
2813 error:
2814         kfree(txq->txb);
2815         txq->txb = NULL;
2816
2817         return -ENOMEM;
2818 }
2819
2820 /**
2821  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2822  */
2823 int
2824 il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
2825                  u32 txq_id)
2826 {
2827         int i, len;
2828         int ret;
2829         int actual_slots = slots_num;
2830
2831         /*
2832          * Alloc buffer array for commands (Tx or other types of commands).
2833          * For the command queue (#4/#9), allocate command space + one big
2834          * command for scan, since scan command is very huge; the system will
2835          * not have two scans at the same time, so only one is needed.
2836          * For normal Tx queues (all other queues), no super-size command
2837          * space is needed.
2838          */
2839         if (txq_id == il->cmd_queue)
2840                 actual_slots++;
2841
2842         txq->meta =
2843             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
2844         txq->cmd =
2845             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
2846
2847         if (!txq->meta || !txq->cmd)
2848                 goto out_free_arrays;
2849
2850         len = sizeof(struct il_device_cmd);
2851         for (i = 0; i < actual_slots; i++) {
2852                 /* only happens for cmd queue */
2853                 if (i == slots_num)
2854                         len = IL_MAX_CMD_SIZE;
2855
2856                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
2857                 if (!txq->cmd[i])
2858                         goto err;
2859         }
2860
2861         /* Alloc driver data array and TFD circular buffer */
2862         ret = il_tx_queue_alloc(il, txq, txq_id);
2863         if (ret)
2864                 goto err;
2865
2866         txq->need_update = 0;
2867
2868         /*
2869          * For the default queues 0-3, set up the swq_id
2870          * already -- all others need to get one later
2871          * (if they need one at all).
2872          */
2873         if (txq_id < 4)
2874                 il_set_swq_id(txq, txq_id, txq_id);
2875
2876         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2877          * il_queue_inc_wrap and il_queue_dec_wrap are broken. */
2878         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2879
2880         /* Initialize queue's high/low-water marks, and head/tail idxes */
2881         il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2882
2883         /* Tell device where to find queue */
2884         il->cfg->ops->lib->txq_init(il, txq);
2885
2886         return 0;
2887 err:
2888         for (i = 0; i < actual_slots; i++)
2889                 kfree(txq->cmd[i]);
2890 out_free_arrays:
2891         kfree(txq->meta);
2892         kfree(txq->cmd);
2893
2894         return -ENOMEM;
2895 }
2896 EXPORT_SYMBOL(il_tx_queue_init);
2897
2898 void
2899 il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
2900                   u32 txq_id)
2901 {
2902         int actual_slots = slots_num;
2903
2904         if (txq_id == il->cmd_queue)
2905                 actual_slots++;
2906
2907         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
2908
2909         txq->need_update = 0;
2910
2911         /* Initialize queue's high/low-water marks, and head/tail idxes */
2912         il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2913
2914         /* Tell device where to find queue */
2915         il->cfg->ops->lib->txq_init(il, txq);
2916 }
2917 EXPORT_SYMBOL(il_tx_queue_reset);
2918
2919 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
2920
2921 /**
2922  * il_enqueue_hcmd - enqueue a uCode command
2923  * @il: device ilate data point
2924  * @cmd: a point to the ucode command structure
2925  *
2926  * The function returns < 0 values to indicate the operation is
2927  * failed. On success, it turns the idx (> 0) of command in the
2928  * command queue.
2929  */
2930 int
2931 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
2932 {
2933         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2934         struct il_queue *q = &txq->q;
2935         struct il_device_cmd *out_cmd;
2936         struct il_cmd_meta *out_meta;
2937         dma_addr_t phys_addr;
2938         unsigned long flags;
2939         int len;
2940         u32 idx;
2941         u16 fix_size;
2942
2943         cmd->len = il->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
2944         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
2945
2946         /* If any of the command structures end up being larger than
2947          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
2948          * we will need to increase the size of the TFD entries
2949          * Also, check to see if command buffer should not exceed the size
2950          * of device_cmd and max_cmd_size. */
2951         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
2952                !(cmd->flags & CMD_SIZE_HUGE));
2953         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
2954
2955         if (il_is_rfkill(il) || il_is_ctkill(il)) {
2956                 IL_WARN("Not sending command - %s KILL\n",
2957                         il_is_rfkill(il) ? "RF" : "CT");
2958                 return -EIO;
2959         }
2960
2961         spin_lock_irqsave(&il->hcmd_lock, flags);
2962
2963         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
2964                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
2965
2966                 IL_ERR("Restarting adapter due to command queue full\n");
2967                 queue_work(il->workqueue, &il->restart);
2968                 return -ENOSPC;
2969         }
2970
2971         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
2972         out_cmd = txq->cmd[idx];
2973         out_meta = &txq->meta[idx];
2974
2975         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
2976                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
2977                 return -ENOSPC;
2978         }
2979
2980         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
2981         out_meta->flags = cmd->flags | CMD_MAPPED;
2982         if (cmd->flags & CMD_WANT_SKB)
2983                 out_meta->source = cmd;
2984         if (cmd->flags & CMD_ASYNC)
2985                 out_meta->callback = cmd->callback;
2986
2987         out_cmd->hdr.cmd = cmd->id;
2988         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
2989
2990         /* At this point, the out_cmd now has all of the incoming cmd
2991          * information */
2992
2993         out_cmd->hdr.flags = 0;
2994         out_cmd->hdr.sequence =
2995             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
2996         if (cmd->flags & CMD_SIZE_HUGE)
2997                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
2998         len = sizeof(struct il_device_cmd);
2999         if (idx == TFD_CMD_SLOTS)
3000                 len = IL_MAX_CMD_SIZE;
3001
3002 #ifdef CONFIG_IWLEGACY_DEBUG
3003         switch (out_cmd->hdr.cmd) {
3004         case C_TX_LINK_QUALITY_CMD:
3005         case C_SENSITIVITY:
3006                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3007                           "%d bytes at %d[%d]:%d\n",
3008                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3009                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3010                           q->write_ptr, idx, il->cmd_queue);
3011                 break;
3012         default:
3013                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3014                      "%d bytes at %d[%d]:%d\n",
3015                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3016                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3017                      idx, il->cmd_queue);
3018         }
3019 #endif
3020         txq->need_update = 1;
3021
3022         if (il->cfg->ops->lib->txq_update_byte_cnt_tbl)
3023                 /* Set up entry in queue's byte count circular buffer */
3024                 il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0);
3025
3026         phys_addr =
3027             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3028                            PCI_DMA_BIDIRECTIONAL);
3029         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3030         dma_unmap_len_set(out_meta, len, fix_size);
3031
3032         il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size,
3033                                                  1, U32_PAD(cmd->len));
3034
3035         /* Increment and update queue's write idx */
3036         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3037         il_txq_update_write_ptr(il, txq);
3038
3039         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3040         return idx;
3041 }
3042
3043 /**
3044  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3045  *
3046  * When FW advances 'R' idx, all entries between old and new 'R' idx
3047  * need to be reclaimed. As result, some free space forms.  If there is
3048  * enough free space (> low mark), wake the stack that feeds us.
3049  */
3050 static void
3051 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3052 {
3053         struct il_tx_queue *txq = &il->txq[txq_id];
3054         struct il_queue *q = &txq->q;
3055         int nfreed = 0;
3056
3057         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3058                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3059                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3060                        q->write_ptr, q->read_ptr);
3061                 return;
3062         }
3063
3064         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3065              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3066
3067                 if (nfreed++ > 0) {
3068                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3069                                q->write_ptr, q->read_ptr);
3070                         queue_work(il->workqueue, &il->restart);
3071                 }
3072
3073         }
3074 }
3075
3076 /**
3077  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3078  * @rxb: Rx buffer to reclaim
3079  *
3080  * If an Rx buffer has an async callback associated with it the callback
3081  * will be executed.  The attached skb (if present) will only be freed
3082  * if the callback returns 1
3083  */
3084 void
3085 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3086 {
3087         struct il_rx_pkt *pkt = rxb_addr(rxb);
3088         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3089         int txq_id = SEQ_TO_QUEUE(sequence);
3090         int idx = SEQ_TO_IDX(sequence);
3091         int cmd_idx;
3092         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3093         struct il_device_cmd *cmd;
3094         struct il_cmd_meta *meta;
3095         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3096         unsigned long flags;
3097
3098         /* If a Tx command is being handled and it isn't in the actual
3099          * command queue then there a command routing bug has been introduced
3100          * in the queue management code. */
3101         if (WARN
3102             (txq_id != il->cmd_queue,
3103              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3104              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3105              il->txq[il->cmd_queue].q.write_ptr)) {
3106                 il_print_hex_error(il, pkt, 32);
3107                 return;
3108         }
3109
3110         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3111         cmd = txq->cmd[cmd_idx];
3112         meta = &txq->meta[cmd_idx];
3113
3114         txq->time_stamp = jiffies;
3115
3116         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3117                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3118
3119         /* Input error checking is done when commands are added to queue. */
3120         if (meta->flags & CMD_WANT_SKB) {
3121                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3122                 rxb->page = NULL;
3123         } else if (meta->callback)
3124                 meta->callback(il, cmd, pkt);
3125
3126         spin_lock_irqsave(&il->hcmd_lock, flags);
3127
3128         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3129
3130         if (!(meta->flags & CMD_ASYNC)) {
3131                 clear_bit(S_HCMD_ACTIVE, &il->status);
3132                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3133                        il_get_cmd_string(cmd->hdr.cmd));
3134                 wake_up(&il->wait_command_queue);
3135         }
3136
3137         /* Mark as unmapped */
3138         meta->flags = 0;
3139
3140         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3141 }
3142 EXPORT_SYMBOL(il_tx_cmd_complete);
3143
3144 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3145 MODULE_VERSION(IWLWIFI_VERSION);
3146 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3147 MODULE_LICENSE("GPL");
3148
3149 /*
3150  * set bt_coex_active to true, uCode will do kill/defer
3151  * every time the priority line is asserted (BT is sending signals on the
3152  * priority line in the PCIx).
3153  * set bt_coex_active to false, uCode will ignore the BT activity and
3154  * perform the normal operation
3155  *
3156  * User might experience transmit issue on some platform due to WiFi/BT
3157  * co-exist problem. The possible behaviors are:
3158  *   Able to scan and finding all the available AP
3159  *   Not able to associate with any AP
3160  * On those platforms, WiFi communication can be restored by set
3161  * "bt_coex_active" module parameter to "false"
3162  *
3163  * default: bt_coex_active = true (BT_COEX_ENABLE)
3164  */
3165 static bool bt_coex_active = true;
3166 module_param(bt_coex_active, bool, S_IRUGO);
3167 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3168
3169 u32 il_debug_level;
3170 EXPORT_SYMBOL(il_debug_level);
3171
3172 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3173 EXPORT_SYMBOL(il_bcast_addr);
3174
3175 /* This function both allocates and initializes hw and il. */
3176 struct ieee80211_hw *
3177 il_alloc_all(struct il_cfg *cfg)
3178 {
3179         struct il_priv *il;
3180         /* mac80211 allocates memory for this device instance, including
3181          *   space for this driver's ilate structure */
3182         struct ieee80211_hw *hw;
3183
3184         hw = ieee80211_alloc_hw(sizeof(struct il_priv),
3185                                 cfg->ops->ieee80211_ops);
3186         if (hw == NULL) {
3187                 pr_err("%s: Can not allocate network device\n", cfg->name);
3188                 goto out;
3189         }
3190
3191         il = hw->priv;
3192         il->hw = hw;
3193
3194 out:
3195         return hw;
3196 }
3197 EXPORT_SYMBOL(il_alloc_all);
3198
3199 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3200 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3201 static void
3202 il_init_ht_hw_capab(const struct il_priv *il,
3203                     struct ieee80211_sta_ht_cap *ht_info,
3204                     enum ieee80211_band band)
3205 {
3206         u16 max_bit_rate = 0;
3207         u8 rx_chains_num = il->hw_params.rx_chains_num;
3208         u8 tx_chains_num = il->hw_params.tx_chains_num;
3209
3210         ht_info->cap = 0;
3211         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3212
3213         ht_info->ht_supported = true;
3214
3215         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3216         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3217         if (il->hw_params.ht40_channel & BIT(band)) {
3218                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3219                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3220                 ht_info->mcs.rx_mask[4] = 0x01;
3221                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3222         }
3223
3224         if (il->cfg->mod_params->amsdu_size_8K)
3225                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3226
3227         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3228         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3229
3230         ht_info->mcs.rx_mask[0] = 0xFF;
3231         if (rx_chains_num >= 2)
3232                 ht_info->mcs.rx_mask[1] = 0xFF;
3233         if (rx_chains_num >= 3)
3234                 ht_info->mcs.rx_mask[2] = 0xFF;
3235
3236         /* Highest supported Rx data rate */
3237         max_bit_rate *= rx_chains_num;
3238         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3239         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3240
3241         /* Tx MCS capabilities */
3242         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3243         if (tx_chains_num != rx_chains_num) {
3244                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3245                 ht_info->mcs.tx_params |=
3246                     ((tx_chains_num -
3247                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3248         }
3249 }
3250
3251 /**
3252  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3253  */
3254 int
3255 il_init_geos(struct il_priv *il)
3256 {
3257         struct il_channel_info *ch;
3258         struct ieee80211_supported_band *sband;
3259         struct ieee80211_channel *channels;
3260         struct ieee80211_channel *geo_ch;
3261         struct ieee80211_rate *rates;
3262         int i = 0;
3263         s8 max_tx_power = 0;
3264
3265         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3266             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3267                 D_INFO("Geography modes already initialized.\n");
3268                 set_bit(S_GEO_CONFIGURED, &il->status);
3269                 return 0;
3270         }
3271
3272         channels =
3273             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3274                     GFP_KERNEL);
3275         if (!channels)
3276                 return -ENOMEM;
3277
3278         rates =
3279             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3280                     GFP_KERNEL);
3281         if (!rates) {
3282                 kfree(channels);
3283                 return -ENOMEM;
3284         }
3285
3286         /* 5.2GHz channels start after the 2.4GHz channels */
3287         sband = &il->bands[IEEE80211_BAND_5GHZ];
3288         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3289         /* just OFDM */
3290         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3291         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3292
3293         if (il->cfg->sku & IL_SKU_N)
3294                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ);
3295
3296         sband = &il->bands[IEEE80211_BAND_2GHZ];
3297         sband->channels = channels;
3298         /* OFDM & CCK */
3299         sband->bitrates = rates;
3300         sband->n_bitrates = RATE_COUNT_LEGACY;
3301
3302         if (il->cfg->sku & IL_SKU_N)
3303                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ);
3304
3305         il->ieee_channels = channels;
3306         il->ieee_rates = rates;
3307
3308         for (i = 0; i < il->channel_count; i++) {
3309                 ch = &il->channel_info[i];
3310
3311                 if (!il_is_channel_valid(ch))
3312                         continue;
3313
3314                 sband = &il->bands[ch->band];
3315
3316                 geo_ch = &sband->channels[sband->n_channels++];
3317
3318                 geo_ch->center_freq =
3319                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3320                 geo_ch->max_power = ch->max_power_avg;
3321                 geo_ch->max_antenna_gain = 0xff;
3322                 geo_ch->hw_value = ch->channel;
3323
3324                 if (il_is_channel_valid(ch)) {
3325                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3326                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3327
3328                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3329                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3330
3331                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3332                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3333
3334                         geo_ch->flags |= ch->ht40_extension_channel;
3335
3336                         if (ch->max_power_avg > max_tx_power)
3337                                 max_tx_power = ch->max_power_avg;
3338                 } else {
3339                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3340                 }
3341
3342                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3343                        geo_ch->center_freq,
3344                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3345                        geo_ch->
3346                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3347                        geo_ch->flags);
3348         }
3349
3350         il->tx_power_device_lmt = max_tx_power;
3351         il->tx_power_user_lmt = max_tx_power;
3352         il->tx_power_next = max_tx_power;
3353
3354         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3355             (il->cfg->sku & IL_SKU_A)) {
3356                 IL_INFO("Incorrectly detected BG card as ABG. "
3357                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3358                         il->pci_dev->device, il->pci_dev->subsystem_device);
3359                 il->cfg->sku &= ~IL_SKU_A;
3360         }
3361
3362         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3363                 il->bands[IEEE80211_BAND_2GHZ].n_channels,
3364                 il->bands[IEEE80211_BAND_5GHZ].n_channels);
3365
3366         set_bit(S_GEO_CONFIGURED, &il->status);
3367
3368         return 0;
3369 }
3370 EXPORT_SYMBOL(il_init_geos);
3371
3372 /*
3373  * il_free_geos - undo allocations in il_init_geos
3374  */
3375 void
3376 il_free_geos(struct il_priv *il)
3377 {
3378         kfree(il->ieee_channels);
3379         kfree(il->ieee_rates);
3380         clear_bit(S_GEO_CONFIGURED, &il->status);
3381 }
3382 EXPORT_SYMBOL(il_free_geos);
3383
3384 static bool
3385 il_is_channel_extension(struct il_priv *il, enum ieee80211_band band,
3386                         u16 channel, u8 extension_chan_offset)
3387 {
3388         const struct il_channel_info *ch_info;
3389
3390         ch_info = il_get_channel_info(il, band, channel);
3391         if (!il_is_channel_valid(ch_info))
3392                 return false;
3393
3394         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3395                 return !(ch_info->
3396                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3397         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3398                 return !(ch_info->
3399                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3400
3401         return false;
3402 }
3403
3404 bool
3405 il_is_ht40_tx_allowed(struct il_priv *il, struct il_rxon_context *ctx,
3406                       struct ieee80211_sta_ht_cap *ht_cap)
3407 {
3408         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
3409                 return false;
3410
3411         /*
3412          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3413          * the bit will not set if it is pure 40MHz case
3414          */
3415         if (ht_cap && !ht_cap->ht_supported)
3416                 return false;
3417
3418 #ifdef CONFIG_IWLEGACY_DEBUGFS
3419         if (il->disable_ht40)
3420                 return false;
3421 #endif
3422
3423         return il_is_channel_extension(il, il->band,
3424                                        le16_to_cpu(ctx->staging.channel),
3425                                        ctx->ht.extension_chan_offset);
3426 }
3427 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3428
3429 static u16
3430 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3431 {
3432         u16 new_val;
3433         u16 beacon_factor;
3434
3435         /*
3436          * If mac80211 hasn't given us a beacon interval, program
3437          * the default into the device.
3438          */
3439         if (!beacon_val)
3440                 return DEFAULT_BEACON_INTERVAL;
3441
3442         /*
3443          * If the beacon interval we obtained from the peer
3444          * is too large, we'll have to wake up more often
3445          * (and in IBSS case, we'll beacon too much)
3446          *
3447          * For example, if max_beacon_val is 4096, and the
3448          * requested beacon interval is 7000, we'll have to
3449          * use 3500 to be able to wake up on the beacons.
3450          *
3451          * This could badly influence beacon detection stats.
3452          */
3453
3454         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3455         new_val = beacon_val / beacon_factor;
3456
3457         if (!new_val)
3458                 new_val = max_beacon_val;
3459
3460         return new_val;
3461 }
3462
3463 int
3464 il_send_rxon_timing(struct il_priv *il, struct il_rxon_context *ctx)
3465 {
3466         u64 tsf;
3467         s32 interval_tm, rem;
3468         struct ieee80211_conf *conf = NULL;
3469         u16 beacon_int;
3470         struct ieee80211_vif *vif = ctx->vif;
3471
3472         conf = &il->hw->conf;
3473
3474         lockdep_assert_held(&il->mutex);
3475
3476         memset(&ctx->timing, 0, sizeof(struct il_rxon_time_cmd));
3477
3478         ctx->timing.timestamp = cpu_to_le64(il->timestamp);
3479         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3480
3481         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3482
3483         /*
3484          * TODO: For IBSS we need to get atim_win from mac80211,
3485          *       for now just always use 0
3486          */
3487         ctx->timing.atim_win = 0;
3488
3489         beacon_int =
3490             il_adjust_beacon_interval(beacon_int,
3491                                       il->hw_params.max_beacon_itrvl *
3492                                       TIME_UNIT);
3493         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
3494
3495         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3496         interval_tm = beacon_int * TIME_UNIT;
3497         rem = do_div(tsf, interval_tm);
3498         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3499
3500         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3501
3502         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3503                 le16_to_cpu(ctx->timing.beacon_interval),
3504                 le32_to_cpu(ctx->timing.beacon_init_val),
3505                 le16_to_cpu(ctx->timing.atim_win));
3506
3507         return il_send_cmd_pdu(il, ctx->rxon_timing_cmd, sizeof(ctx->timing),
3508                                &ctx->timing);
3509 }
3510 EXPORT_SYMBOL(il_send_rxon_timing);
3511
3512 void
3513 il_set_rxon_hwcrypto(struct il_priv *il, struct il_rxon_context *ctx,
3514                      int hw_decrypt)
3515 {
3516         struct il_rxon_cmd *rxon = &ctx->staging;
3517
3518         if (hw_decrypt)
3519                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3520         else
3521                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3522
3523 }
3524 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3525
3526 /* validate RXON structure is valid */
3527 int
3528 il_check_rxon_cmd(struct il_priv *il, struct il_rxon_context *ctx)
3529 {
3530         struct il_rxon_cmd *rxon = &ctx->staging;
3531         bool error = false;
3532
3533         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3534                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3535                         IL_WARN("check 2.4G: wrong narrow\n");
3536                         error = true;
3537                 }
3538                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3539                         IL_WARN("check 2.4G: wrong radar\n");
3540                         error = true;
3541                 }
3542         } else {
3543                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3544                         IL_WARN("check 5.2G: not short slot!\n");
3545                         error = true;
3546                 }
3547                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3548                         IL_WARN("check 5.2G: CCK!\n");
3549                         error = true;
3550                 }
3551         }
3552         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3553                 IL_WARN("mac/bssid mcast!\n");
3554                 error = true;
3555         }
3556
3557         /* make sure basic rates 6Mbps and 1Mbps are supported */
3558         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3559             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3560                 IL_WARN("neither 1 nor 6 are basic\n");
3561                 error = true;
3562         }
3563
3564         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3565                 IL_WARN("aid > 2007\n");
3566                 error = true;
3567         }
3568
3569         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3570             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3571                 IL_WARN("CCK and short slot\n");
3572                 error = true;
3573         }
3574
3575         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3576             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3577                 IL_WARN("CCK and auto detect");
3578                 error = true;
3579         }
3580
3581         if ((rxon->
3582              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3583             RXON_FLG_TGG_PROTECT_MSK) {
3584                 IL_WARN("TGg but no auto-detect\n");
3585                 error = true;
3586         }
3587
3588         if (error)
3589                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3590
3591         if (error) {
3592                 IL_ERR("Invalid RXON\n");
3593                 return -EINVAL;
3594         }
3595         return 0;
3596 }
3597 EXPORT_SYMBOL(il_check_rxon_cmd);
3598
3599 /**
3600  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3601  * @il: staging_rxon is compared to active_rxon
3602  *
3603  * If the RXON structure is changing enough to require a new tune,
3604  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3605  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3606  */
3607 int
3608 il_full_rxon_required(struct il_priv *il, struct il_rxon_context *ctx)
3609 {
3610         const struct il_rxon_cmd *staging = &ctx->staging;
3611         const struct il_rxon_cmd *active = &ctx->active;
3612
3613 #define CHK(cond)                                                       \
3614         if ((cond)) {                                                   \
3615                 D_INFO("need full RXON - " #cond "\n"); \
3616                 return 1;                                               \
3617         }
3618
3619 #define CHK_NEQ(c1, c2)                                         \
3620         if ((c1) != (c2)) {                                     \
3621                 D_INFO("need full RXON - "      \
3622                                #c1 " != " #c2 " - %d != %d\n",  \
3623                                (c1), (c2));                     \
3624                 return 1;                                       \
3625         }
3626
3627         /* These items are only settable from the full RXON command */
3628         CHK(!il_is_associated_ctx(ctx));
3629         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
3630         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
3631         CHK(compare_ether_addr
3632             (staging->wlap_bssid_addr, active->wlap_bssid_addr));
3633         CHK_NEQ(staging->dev_type, active->dev_type);
3634         CHK_NEQ(staging->channel, active->channel);
3635         CHK_NEQ(staging->air_propagation, active->air_propagation);
3636         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3637                 active->ofdm_ht_single_stream_basic_rates);
3638         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3639                 active->ofdm_ht_dual_stream_basic_rates);
3640         CHK_NEQ(staging->assoc_id, active->assoc_id);
3641
3642         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3643          * be updated with the RXON_ASSOC command -- however only some
3644          * flag transitions are allowed using RXON_ASSOC */
3645
3646         /* Check if we are not switching bands */
3647         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3648                 active->flags & RXON_FLG_BAND_24G_MSK);
3649
3650         /* Check if we are switching association toggle */
3651         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3652                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3653
3654 #undef CHK
3655 #undef CHK_NEQ
3656
3657         return 0;
3658 }
3659 EXPORT_SYMBOL(il_full_rxon_required);
3660
3661 u8
3662 il_get_lowest_plcp(struct il_priv *il, struct il_rxon_context *ctx)
3663 {
3664         /*
3665          * Assign the lowest rate -- should really get this from
3666          * the beacon skb from mac80211.
3667          */
3668         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
3669                 return RATE_1M_PLCP;
3670         else
3671                 return RATE_6M_PLCP;
3672 }
3673 EXPORT_SYMBOL(il_get_lowest_plcp);
3674
3675 static void
3676 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf,
3677                 struct il_rxon_context *ctx)
3678 {
3679         struct il_rxon_cmd *rxon = &ctx->staging;
3680
3681         if (!ctx->ht.enabled) {
3682                 rxon->flags &=
3683                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3684                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3685                       | RXON_FLG_HT_PROT_MSK);
3686                 return;
3687         }
3688
3689         rxon->flags |=
3690             cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3691
3692         /* Set up channel bandwidth:
3693          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3694         /* clear the HT channel mode before set the mode */
3695         rxon->flags &=
3696             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3697         if (il_is_ht40_tx_allowed(il, ctx, NULL)) {
3698                 /* pure ht40 */
3699                 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3700                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3701                         /* Note: control channel is opposite of extension channel */
3702                         switch (ctx->ht.extension_chan_offset) {
3703                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3704                                 rxon->flags &=
3705                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3706                                 break;
3707                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3708                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3709                                 break;
3710                         }
3711                 } else {
3712                         /* Note: control channel is opposite of extension channel */
3713                         switch (ctx->ht.extension_chan_offset) {
3714                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3715                                 rxon->flags &=
3716                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3717                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3718                                 break;
3719                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3720                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3721                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3722                                 break;
3723                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3724                         default:
3725                                 /* channel location only valid if in Mixed mode */
3726                                 IL_ERR("invalid extension channel offset\n");
3727                                 break;
3728                         }
3729                 }
3730         } else {
3731                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3732         }
3733
3734         if (il->cfg->ops->hcmd->set_rxon_chain)
3735                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
3736
3737         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3738                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3739                 ctx->ht.protection, ctx->ht.extension_chan_offset);
3740 }
3741
3742 void
3743 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3744 {
3745         _il_set_rxon_ht(il, ht_conf, &il->ctx);
3746 }
3747 EXPORT_SYMBOL(il_set_rxon_ht);
3748
3749 /* Return valid, unused, channel for a passive scan to reset the RF */
3750 u8
3751 il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band)
3752 {
3753         const struct il_channel_info *ch_info;
3754         int i;
3755         u8 channel = 0;
3756         u8 min, max;
3757
3758         if (band == IEEE80211_BAND_5GHZ) {
3759                 min = 14;
3760                 max = il->channel_count;
3761         } else {
3762                 min = 0;
3763                 max = 14;
3764         }
3765
3766         for (i = min; i < max; i++) {
3767                 channel = il->channel_info[i].channel;
3768                 if (channel == le16_to_cpu(il->ctx.staging.channel))
3769                         continue;
3770
3771                 ch_info = il_get_channel_info(il, band, channel);
3772                 if (il_is_channel_valid(ch_info))
3773                         break;
3774         }
3775
3776         return channel;
3777 }
3778 EXPORT_SYMBOL(il_get_single_channel_number);
3779
3780 /**
3781  * il_set_rxon_channel - Set the band and channel values in staging RXON
3782  * @ch: requested channel as a pointer to struct ieee80211_channel
3783
3784  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3785  * in the staging RXON flag structure based on the ch->band
3786  */
3787 int
3788 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch,
3789                     struct il_rxon_context *ctx)
3790 {
3791         enum ieee80211_band band = ch->band;
3792         u16 channel = ch->hw_value;
3793
3794         if (le16_to_cpu(ctx->staging.channel) == channel && il->band == band)
3795                 return 0;
3796
3797         ctx->staging.channel = cpu_to_le16(channel);
3798         if (band == IEEE80211_BAND_5GHZ)
3799                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3800         else
3801                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3802
3803         il->band = band;
3804
3805         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3806
3807         return 0;
3808 }
3809 EXPORT_SYMBOL(il_set_rxon_channel);
3810
3811 void
3812 il_set_flags_for_band(struct il_priv *il, struct il_rxon_context *ctx,
3813                       enum ieee80211_band band, struct ieee80211_vif *vif)
3814 {
3815         if (band == IEEE80211_BAND_5GHZ) {
3816                 ctx->staging.flags &=
3817                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3818                       RXON_FLG_CCK_MSK);
3819                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3820         } else {
3821                 /* Copied from il_post_associate() */
3822                 if (vif && vif->bss_conf.use_short_slot)
3823                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3824                 else
3825                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3826
3827                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3828                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3829                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
3830         }
3831 }
3832 EXPORT_SYMBOL(il_set_flags_for_band);
3833
3834 /*
3835  * initialize rxon structure with default values from eeprom
3836  */
3837 void
3838 il_connection_init_rx_config(struct il_priv *il, struct il_rxon_context *ctx)
3839 {
3840         const struct il_channel_info *ch_info;
3841
3842         memset(&ctx->staging, 0, sizeof(ctx->staging));
3843
3844         if (!ctx->vif) {
3845                 ctx->staging.dev_type = ctx->unused_devtype;
3846         } else
3847                 switch (ctx->vif->type) {
3848
3849                 case NL80211_IFTYPE_STATION:
3850                         ctx->staging.dev_type = ctx->station_devtype;
3851                         ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3852                         break;
3853
3854                 case NL80211_IFTYPE_ADHOC:
3855                         ctx->staging.dev_type = ctx->ibss_devtype;
3856                         ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3857                         ctx->staging.filter_flags =
3858                             RXON_FILTER_BCON_AWARE_MSK |
3859                             RXON_FILTER_ACCEPT_GRP_MSK;
3860                         break;
3861
3862                 default:
3863                         IL_ERR("Unsupported interface type %d\n",
3864                                ctx->vif->type);
3865                         break;
3866                 }
3867
3868 #if 0
3869         /* TODO:  Figure out when short_preamble would be set and cache from
3870          * that */
3871         if (!hw_to_local(il->hw)->short_preamble)
3872                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3873         else
3874                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3875 #endif
3876
3877         ch_info =
3878             il_get_channel_info(il, il->band, le16_to_cpu(ctx->active.channel));
3879
3880         if (!ch_info)
3881                 ch_info = &il->channel_info[0];
3882
3883         ctx->staging.channel = cpu_to_le16(ch_info->channel);
3884         il->band = ch_info->band;
3885
3886         il_set_flags_for_band(il, ctx, il->band, ctx->vif);
3887
3888         ctx->staging.ofdm_basic_rates =
3889             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3890         ctx->staging.cck_basic_rates =
3891             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3892
3893         /* clear both MIX and PURE40 mode flag */
3894         ctx->staging.flags &=
3895             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
3896         if (ctx->vif)
3897                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
3898
3899         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
3900         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
3901 }
3902 EXPORT_SYMBOL(il_connection_init_rx_config);
3903
3904 void
3905 il_set_rate(struct il_priv *il)
3906 {
3907         const struct ieee80211_supported_band *hw = NULL;
3908         struct ieee80211_rate *rate;
3909         int i;
3910
3911         hw = il_get_hw_mode(il, il->band);
3912         if (!hw) {
3913                 IL_ERR("Failed to set rate: unable to get hw mode\n");
3914                 return;
3915         }
3916
3917         il->active_rate = 0;
3918
3919         for (i = 0; i < hw->n_bitrates; i++) {
3920                 rate = &(hw->bitrates[i]);
3921                 if (rate->hw_value < RATE_COUNT_LEGACY)
3922                         il->active_rate |= (1 << rate->hw_value);
3923         }
3924
3925         D_RATE("Set active_rate = %0x\n", il->active_rate);
3926
3927         il->ctx.staging.cck_basic_rates =
3928             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3929
3930         il->ctx.staging.ofdm_basic_rates =
3931             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3932 }
3933 EXPORT_SYMBOL(il_set_rate);
3934
3935 void
3936 il_chswitch_done(struct il_priv *il, bool is_success)
3937 {
3938         struct il_rxon_context *ctx = &il->ctx;
3939
3940         if (test_bit(S_EXIT_PENDING, &il->status))
3941                 return;
3942
3943         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
3944                 ieee80211_chswitch_done(ctx->vif, is_success);
3945 }
3946 EXPORT_SYMBOL(il_chswitch_done);
3947
3948 void
3949 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
3950 {
3951         struct il_rx_pkt *pkt = rxb_addr(rxb);
3952         struct il_csa_notification *csa = &(pkt->u.csa_notif);
3953
3954         struct il_rxon_context *ctx = &il->ctx;
3955         struct il_rxon_cmd *rxon = (void *)&ctx->active;
3956
3957         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
3958                 return;
3959
3960         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
3961                 rxon->channel = csa->channel;
3962                 ctx->staging.channel = csa->channel;
3963                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
3964                 il_chswitch_done(il, true);
3965         } else {
3966                 IL_ERR("CSA notif (fail) : channel %d\n",
3967                        le16_to_cpu(csa->channel));
3968                 il_chswitch_done(il, false);
3969         }
3970 }
3971 EXPORT_SYMBOL(il_hdl_csa);
3972
3973 #ifdef CONFIG_IWLEGACY_DEBUG
3974 void
3975 il_print_rx_config_cmd(struct il_priv *il, struct il_rxon_context *ctx)
3976 {
3977         struct il_rxon_cmd *rxon = &ctx->staging;
3978
3979         D_RADIO("RX CONFIG:\n");
3980         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3981         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3982         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3983         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
3984         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3985         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
3986         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3987         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
3988         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
3989         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3990 }
3991 EXPORT_SYMBOL(il_print_rx_config_cmd);
3992 #endif
3993 /**
3994  * il_irq_handle_error - called for HW or SW error interrupt from card
3995  */
3996 void
3997 il_irq_handle_error(struct il_priv *il)
3998 {
3999         /* Set the FW error flag -- cleared on il_down */
4000         set_bit(S_FW_ERROR, &il->status);
4001
4002         /* Cancel currently queued command. */
4003         clear_bit(S_HCMD_ACTIVE, &il->status);
4004
4005         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4006
4007         il->cfg->ops->lib->dump_nic_error_log(il);
4008         if (il->cfg->ops->lib->dump_fh)
4009                 il->cfg->ops->lib->dump_fh(il, NULL, false);
4010 #ifdef CONFIG_IWLEGACY_DEBUG
4011         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4012                 il_print_rx_config_cmd(il, &il->ctx);
4013 #endif
4014
4015         wake_up(&il->wait_command_queue);
4016
4017         /* Keep the restart process from trying to send host
4018          * commands by clearing the INIT status bit */
4019         clear_bit(S_READY, &il->status);
4020
4021         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4022                 IL_DBG(IL_DL_FW_ERRORS,
4023                        "Restarting adapter due to uCode error.\n");
4024
4025                 if (il->cfg->mod_params->restart_fw)
4026                         queue_work(il->workqueue, &il->restart);
4027         }
4028 }
4029 EXPORT_SYMBOL(il_irq_handle_error);
4030
4031 static int
4032 il_apm_stop_master(struct il_priv *il)
4033 {
4034         int ret = 0;
4035
4036         /* stop device's busmaster DMA activity */
4037         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4038
4039         ret =
4040             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4041                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4042         if (ret)
4043                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4044
4045         D_INFO("stop master\n");
4046
4047         return ret;
4048 }
4049
4050 void
4051 il_apm_stop(struct il_priv *il)
4052 {
4053         D_INFO("Stop card, put in low power state\n");
4054
4055         /* Stop device's DMA activity */
4056         il_apm_stop_master(il);
4057
4058         /* Reset the entire device */
4059         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4060
4061         udelay(10);
4062
4063         /*
4064          * Clear "initialization complete" bit to move adapter from
4065          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4066          */
4067         il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4068 }
4069 EXPORT_SYMBOL(il_apm_stop);
4070
4071 /*
4072  * Start up NIC's basic functionality after it has been reset
4073  * (e.g. after platform boot, or shutdown via il_apm_stop())
4074  * NOTE:  This does not load uCode nor start the embedded processor
4075  */
4076 int
4077 il_apm_init(struct il_priv *il)
4078 {
4079         int ret = 0;
4080         u16 lctl;
4081
4082         D_INFO("Init card's basic functions\n");
4083
4084         /*
4085          * Use "set_bit" below rather than "write", to preserve any hardware
4086          * bits already set by default after reset.
4087          */
4088
4089         /* Disable L0S exit timer (platform NMI Work/Around) */
4090         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4091                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4092
4093         /*
4094          * Disable L0s without affecting L1;
4095          *  don't wait for ICH L0s (ICH bug W/A)
4096          */
4097         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4098                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4099
4100         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4101         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4102
4103         /*
4104          * Enable HAP INTA (interrupt from management bus) to
4105          * wake device's PCI Express link L1a -> L0s
4106          * NOTE:  This is no-op for 3945 (non-existent bit)
4107          */
4108         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4109                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4110
4111         /*
4112          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4113          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4114          * If so (likely), disable L0S, so device moves directly L0->L1;
4115          *    costs negligible amount of power savings.
4116          * If not (unlikely), enable L0S, so there is at least some
4117          *    power savings, even without L1.
4118          */
4119         if (il->cfg->base_params->set_l0s) {
4120                 lctl = il_pcie_link_ctl(il);
4121                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4122                     PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4123                         /* L1-ASPM enabled; disable(!) L0S  */
4124                         il_set_bit(il, CSR_GIO_REG,
4125                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4126                         D_POWER("L1 Enabled; Disabling L0S\n");
4127                 } else {
4128                         /* L1-ASPM disabled; enable(!) L0S */
4129                         il_clear_bit(il, CSR_GIO_REG,
4130                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4131                         D_POWER("L1 Disabled; Enabling L0S\n");
4132                 }
4133         }
4134
4135         /* Configure analog phase-lock-loop before activating to D0A */
4136         if (il->cfg->base_params->pll_cfg_val)
4137                 il_set_bit(il, CSR_ANA_PLL_CFG,
4138                            il->cfg->base_params->pll_cfg_val);
4139
4140         /*
4141          * Set "initialization complete" bit to move adapter from
4142          * D0U* --> D0A* (powered-up active) state.
4143          */
4144         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4145
4146         /*
4147          * Wait for clock stabilization; once stabilized, access to
4148          * device-internal resources is supported, e.g. il_wr_prph()
4149          * and accesses to uCode SRAM.
4150          */
4151         ret =
4152             _il_poll_bit(il, CSR_GP_CNTRL,
4153                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4154                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4155         if (ret < 0) {
4156                 D_INFO("Failed to init the card\n");
4157                 goto out;
4158         }
4159
4160         /*
4161          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4162          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4163          *
4164          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4165          * do not disable clocks.  This preserves any hardware bits already
4166          * set by default in "CLK_CTRL_REG" after reset.
4167          */
4168         if (il->cfg->base_params->use_bsm)
4169                 il_wr_prph(il, APMG_CLK_EN_REG,
4170                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4171         else
4172                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4173         udelay(20);
4174
4175         /* Disable L1-Active */
4176         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4177                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4178
4179 out:
4180         return ret;
4181 }
4182 EXPORT_SYMBOL(il_apm_init);
4183
4184 int
4185 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4186 {
4187         int ret;
4188         s8 prev_tx_power;
4189         bool defer;
4190         struct il_rxon_context *ctx = &il->ctx;
4191
4192         lockdep_assert_held(&il->mutex);
4193
4194         if (il->tx_power_user_lmt == tx_power && !force)
4195                 return 0;
4196
4197         if (!il->cfg->ops->lib->send_tx_power)
4198                 return -EOPNOTSUPP;
4199
4200         /* 0 dBm mean 1 milliwatt */
4201         if (tx_power < 0) {
4202                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4203                 return -EINVAL;
4204         }
4205
4206         if (tx_power > il->tx_power_device_lmt) {
4207                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4208                         tx_power, il->tx_power_device_lmt);
4209                 return -EINVAL;
4210         }
4211
4212         if (!il_is_ready_rf(il))
4213                 return -EIO;
4214
4215         /* scan complete and commit_rxon use tx_power_next value,
4216          * it always need to be updated for newest request */
4217         il->tx_power_next = tx_power;
4218
4219         /* do not set tx power when scanning or channel changing */
4220         defer = test_bit(S_SCANNING, &il->status) ||
4221             memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
4222         if (defer && !force) {
4223                 D_INFO("Deferring tx power set\n");
4224                 return 0;
4225         }
4226
4227         prev_tx_power = il->tx_power_user_lmt;
4228         il->tx_power_user_lmt = tx_power;
4229
4230         ret = il->cfg->ops->lib->send_tx_power(il);
4231
4232         /* if fail to set tx_power, restore the orig. tx power */
4233         if (ret) {
4234                 il->tx_power_user_lmt = prev_tx_power;
4235                 il->tx_power_next = prev_tx_power;
4236         }
4237         return ret;
4238 }
4239 EXPORT_SYMBOL(il_set_tx_power);
4240
4241 void
4242 il_send_bt_config(struct il_priv *il)
4243 {
4244         struct il_bt_cmd bt_cmd = {
4245                 .lead_time = BT_LEAD_TIME_DEF,
4246                 .max_kill = BT_MAX_KILL_DEF,
4247                 .kill_ack_mask = 0,
4248                 .kill_cts_mask = 0,
4249         };
4250
4251         if (!bt_coex_active)
4252                 bt_cmd.flags = BT_COEX_DISABLE;
4253         else
4254                 bt_cmd.flags = BT_COEX_ENABLE;
4255
4256         D_INFO("BT coex %s\n",
4257                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4258
4259         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4260                 IL_ERR("failed to send BT Coex Config\n");
4261 }
4262 EXPORT_SYMBOL(il_send_bt_config);
4263
4264 int
4265 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4266 {
4267         struct il_stats_cmd stats_cmd = {
4268                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4269         };
4270
4271         if (flags & CMD_ASYNC)
4272                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4273                                              &stats_cmd, NULL);
4274         else
4275                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4276                                        &stats_cmd);
4277 }
4278 EXPORT_SYMBOL(il_send_stats_request);
4279
4280 void
4281 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4282 {
4283 #ifdef CONFIG_IWLEGACY_DEBUG
4284         struct il_rx_pkt *pkt = rxb_addr(rxb);
4285         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4286         D_RX("sleep mode: %d, src: %d\n",
4287              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4288 #endif
4289 }
4290 EXPORT_SYMBOL(il_hdl_pm_sleep);
4291
4292 void
4293 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4294 {
4295         struct il_rx_pkt *pkt = rxb_addr(rxb);
4296         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4297         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4298                 il_get_cmd_string(pkt->hdr.cmd));
4299         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4300 }
4301 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4302
4303 void
4304 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4305 {
4306         struct il_rx_pkt *pkt = rxb_addr(rxb);
4307
4308         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4309                "seq 0x%04X ser 0x%08X\n",
4310                le32_to_cpu(pkt->u.err_resp.error_type),
4311                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4312                pkt->u.err_resp.cmd_id,
4313                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4314                le32_to_cpu(pkt->u.err_resp.error_info));
4315 }
4316 EXPORT_SYMBOL(il_hdl_error);
4317
4318 void
4319 il_clear_isr_stats(struct il_priv *il)
4320 {
4321         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4322 }
4323
4324 int
4325 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4326                const struct ieee80211_tx_queue_params *params)
4327 {
4328         struct il_priv *il = hw->priv;
4329         unsigned long flags;
4330         int q;
4331
4332         D_MAC80211("enter\n");
4333
4334         if (!il_is_ready_rf(il)) {
4335                 D_MAC80211("leave - RF not ready\n");
4336                 return -EIO;
4337         }
4338
4339         if (queue >= AC_NUM) {
4340                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4341                 return 0;
4342         }
4343
4344         q = AC_NUM - 1 - queue;
4345
4346         spin_lock_irqsave(&il->lock, flags);
4347
4348         il->ctx.qos_data.def_qos_parm.ac[q].cw_min =
4349             cpu_to_le16(params->cw_min);
4350         il->ctx.qos_data.def_qos_parm.ac[q].cw_max =
4351             cpu_to_le16(params->cw_max);
4352         il->ctx.qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4353         il->ctx.qos_data.def_qos_parm.ac[q].edca_txop =
4354             cpu_to_le16((params->txop * 32));
4355
4356         il->ctx.qos_data.def_qos_parm.ac[q].reserved1 = 0;
4357
4358         spin_unlock_irqrestore(&il->lock, flags);
4359
4360         D_MAC80211("leave\n");
4361         return 0;
4362 }
4363 EXPORT_SYMBOL(il_mac_conf_tx);
4364
4365 int
4366 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4367 {
4368         struct il_priv *il = hw->priv;
4369
4370         return il->ibss_manager == IL_IBSS_MANAGER;
4371 }
4372 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4373
4374 static int
4375 il_set_mode(struct il_priv *il, struct il_rxon_context *ctx)
4376 {
4377         il_connection_init_rx_config(il, ctx);
4378
4379         if (il->cfg->ops->hcmd->set_rxon_chain)
4380                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
4381
4382         return il_commit_rxon(il, ctx);
4383 }
4384
4385 static int
4386 il_setup_interface(struct il_priv *il, struct il_rxon_context *ctx)
4387 {
4388         struct ieee80211_vif *vif = ctx->vif;
4389         int err;
4390
4391         lockdep_assert_held(&il->mutex);
4392
4393         /*
4394          * This variable will be correct only when there's just
4395          * a single context, but all code using it is for hardware
4396          * that supports only one context.
4397          */
4398         il->iw_mode = vif->type;
4399
4400         ctx->is_active = true;
4401
4402         err = il_set_mode(il, ctx);
4403         if (err) {
4404                 if (!ctx->always_active)
4405                         ctx->is_active = false;
4406                 return err;
4407         }
4408
4409         return 0;
4410 }
4411
4412 int
4413 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4414 {
4415         struct il_priv *il = hw->priv;
4416         struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
4417         int err;
4418         u32 modes;
4419
4420         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4421
4422         mutex_lock(&il->mutex);
4423
4424         if (!il_is_ready_rf(il)) {
4425                 IL_WARN("Try to add interface when device not ready\n");
4426                 err = -EINVAL;
4427                 goto out;
4428         }
4429
4430         /* check if busy context is exclusive */
4431         if (il->ctx.vif &&
4432             (il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type))) {
4433                 err = -EINVAL;
4434                 goto out;
4435         }
4436
4437         modes = il->ctx.interface_modes | il->ctx.exclusive_interface_modes;
4438         if (!(modes & BIT(vif->type))) {
4439                 err = -EOPNOTSUPP;
4440                 goto out;
4441         }
4442
4443         vif_priv->ctx = &il->ctx;
4444         il->ctx.vif = vif;
4445
4446         err = il_setup_interface(il, &il->ctx);
4447         if (err) {
4448                 il->ctx.vif = NULL;
4449                 il->iw_mode = NL80211_IFTYPE_STATION;
4450         }
4451
4452 out:
4453         mutex_unlock(&il->mutex);
4454
4455         D_MAC80211("leave\n");
4456         return err;
4457 }
4458 EXPORT_SYMBOL(il_mac_add_interface);
4459
4460 static void
4461 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif,
4462                       bool mode_change)
4463 {
4464         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4465
4466         lockdep_assert_held(&il->mutex);
4467
4468         if (il->scan_vif == vif) {
4469                 il_scan_cancel_timeout(il, 200);
4470                 il_force_scan_end(il);
4471         }
4472
4473         if (!mode_change) {
4474                 il_set_mode(il, ctx);
4475                 if (!ctx->always_active)
4476                         ctx->is_active = false;
4477         }
4478 }
4479
4480 void
4481 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4482 {
4483         struct il_priv *il = hw->priv;
4484         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4485
4486         D_MAC80211("enter\n");
4487
4488         mutex_lock(&il->mutex);
4489
4490         WARN_ON(ctx->vif != vif);
4491         ctx->vif = NULL;
4492
4493         il_teardown_interface(il, vif, false);
4494
4495         memset(il->bssid, 0, ETH_ALEN);
4496         mutex_unlock(&il->mutex);
4497
4498         D_MAC80211("leave\n");
4499
4500 }
4501 EXPORT_SYMBOL(il_mac_remove_interface);
4502
4503 int
4504 il_alloc_txq_mem(struct il_priv *il)
4505 {
4506         if (!il->txq)
4507                 il->txq =
4508                     kzalloc(sizeof(struct il_tx_queue) *
4509                             il->cfg->base_params->num_of_queues, GFP_KERNEL);
4510         if (!il->txq) {
4511                 IL_ERR("Not enough memory for txq\n");
4512                 return -ENOMEM;
4513         }
4514         return 0;
4515 }
4516 EXPORT_SYMBOL(il_alloc_txq_mem);
4517
4518 void
4519 il_txq_mem(struct il_priv *il)
4520 {
4521         kfree(il->txq);
4522         il->txq = NULL;
4523 }
4524 EXPORT_SYMBOL(il_txq_mem);
4525
4526 #ifdef CONFIG_IWLEGACY_DEBUGFS
4527
4528 #define IL_TRAFFIC_DUMP_SIZE    (IL_TRAFFIC_ENTRY_SIZE * IL_TRAFFIC_ENTRIES)
4529
4530 void
4531 il_reset_traffic_log(struct il_priv *il)
4532 {
4533         il->tx_traffic_idx = 0;
4534         il->rx_traffic_idx = 0;
4535         if (il->tx_traffic)
4536                 memset(il->tx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4537         if (il->rx_traffic)
4538                 memset(il->rx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4539 }
4540
4541 int
4542 il_alloc_traffic_mem(struct il_priv *il)
4543 {
4544         u32 traffic_size = IL_TRAFFIC_DUMP_SIZE;
4545
4546         if (il_debug_level & IL_DL_TX) {
4547                 if (!il->tx_traffic) {
4548                         il->tx_traffic = kzalloc(traffic_size, GFP_KERNEL);
4549                         if (!il->tx_traffic)
4550                                 return -ENOMEM;
4551                 }
4552         }
4553         if (il_debug_level & IL_DL_RX) {
4554                 if (!il->rx_traffic) {
4555                         il->rx_traffic = kzalloc(traffic_size, GFP_KERNEL);
4556                         if (!il->rx_traffic)
4557                                 return -ENOMEM;
4558                 }
4559         }
4560         il_reset_traffic_log(il);
4561         return 0;
4562 }
4563 EXPORT_SYMBOL(il_alloc_traffic_mem);
4564
4565 void
4566 il_free_traffic_mem(struct il_priv *il)
4567 {
4568         kfree(il->tx_traffic);
4569         il->tx_traffic = NULL;
4570
4571         kfree(il->rx_traffic);
4572         il->rx_traffic = NULL;
4573 }
4574 EXPORT_SYMBOL(il_free_traffic_mem);
4575
4576 void
4577 il_dbg_log_tx_data_frame(struct il_priv *il, u16 length,
4578                          struct ieee80211_hdr *header)
4579 {
4580         __le16 fc;
4581         u16 len;
4582
4583         if (likely(!(il_debug_level & IL_DL_TX)))
4584                 return;
4585
4586         if (!il->tx_traffic)
4587                 return;
4588
4589         fc = header->frame_control;
4590         if (ieee80211_is_data(fc)) {
4591                 len =
4592                     (length >
4593                      IL_TRAFFIC_ENTRY_SIZE) ? IL_TRAFFIC_ENTRY_SIZE : length;
4594                 memcpy((il->tx_traffic +
4595                         (il->tx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)), header,
4596                        len);
4597                 il->tx_traffic_idx =
4598                     (il->tx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4599         }
4600 }
4601 EXPORT_SYMBOL(il_dbg_log_tx_data_frame);
4602
4603 void
4604 il_dbg_log_rx_data_frame(struct il_priv *il, u16 length,
4605                          struct ieee80211_hdr *header)
4606 {
4607         __le16 fc;
4608         u16 len;
4609
4610         if (likely(!(il_debug_level & IL_DL_RX)))
4611                 return;
4612
4613         if (!il->rx_traffic)
4614                 return;
4615
4616         fc = header->frame_control;
4617         if (ieee80211_is_data(fc)) {
4618                 len =
4619                     (length >
4620                      IL_TRAFFIC_ENTRY_SIZE) ? IL_TRAFFIC_ENTRY_SIZE : length;
4621                 memcpy((il->rx_traffic +
4622                         (il->rx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)), header,
4623                        len);
4624                 il->rx_traffic_idx =
4625                     (il->rx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4626         }
4627 }
4628 EXPORT_SYMBOL(il_dbg_log_rx_data_frame);
4629
4630 const char *
4631 il_get_mgmt_string(int cmd)
4632 {
4633         switch (cmd) {
4634                 IL_CMD(MANAGEMENT_ASSOC_REQ);
4635                 IL_CMD(MANAGEMENT_ASSOC_RESP);
4636                 IL_CMD(MANAGEMENT_REASSOC_REQ);
4637                 IL_CMD(MANAGEMENT_REASSOC_RESP);
4638                 IL_CMD(MANAGEMENT_PROBE_REQ);
4639                 IL_CMD(MANAGEMENT_PROBE_RESP);
4640                 IL_CMD(MANAGEMENT_BEACON);
4641                 IL_CMD(MANAGEMENT_ATIM);
4642                 IL_CMD(MANAGEMENT_DISASSOC);
4643                 IL_CMD(MANAGEMENT_AUTH);
4644                 IL_CMD(MANAGEMENT_DEAUTH);
4645                 IL_CMD(MANAGEMENT_ACTION);
4646         default:
4647                 return "UNKNOWN";
4648
4649         }
4650 }
4651
4652 const char *
4653 il_get_ctrl_string(int cmd)
4654 {
4655         switch (cmd) {
4656                 IL_CMD(CONTROL_BACK_REQ);
4657                 IL_CMD(CONTROL_BACK);
4658                 IL_CMD(CONTROL_PSPOLL);
4659                 IL_CMD(CONTROL_RTS);
4660                 IL_CMD(CONTROL_CTS);
4661                 IL_CMD(CONTROL_ACK);
4662                 IL_CMD(CONTROL_CFEND);
4663                 IL_CMD(CONTROL_CFENDACK);
4664         default:
4665                 return "UNKNOWN";
4666
4667         }
4668 }
4669
4670 void
4671 il_clear_traffic_stats(struct il_priv *il)
4672 {
4673         memset(&il->tx_stats, 0, sizeof(struct traffic_stats));
4674         memset(&il->rx_stats, 0, sizeof(struct traffic_stats));
4675 }
4676
4677 /*
4678  * if CONFIG_IWLEGACY_DEBUGFS defined,
4679  * il_update_stats function will
4680  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
4681  * Use debugFs to display the rx/rx_stats
4682  * if CONFIG_IWLEGACY_DEBUGFS not being defined, then no MGMT and CTRL
4683  * information will be recorded, but DATA pkt still will be recorded
4684  * for the reason of il_led.c need to control the led blinking based on
4685  * number of tx and rx data.
4686  *
4687  */
4688 void
4689 il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
4690 {
4691         struct traffic_stats *stats;
4692
4693         if (is_tx)
4694                 stats = &il->tx_stats;
4695         else
4696                 stats = &il->rx_stats;
4697
4698         if (ieee80211_is_mgmt(fc)) {
4699                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4700                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
4701                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
4702                         break;
4703                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
4704                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
4705                         break;
4706                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
4707                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
4708                         break;
4709                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
4710                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
4711                         break;
4712                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
4713                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
4714                         break;
4715                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
4716                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
4717                         break;
4718                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
4719                         stats->mgmt[MANAGEMENT_BEACON]++;
4720                         break;
4721                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
4722                         stats->mgmt[MANAGEMENT_ATIM]++;
4723                         break;
4724                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
4725                         stats->mgmt[MANAGEMENT_DISASSOC]++;
4726                         break;
4727                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
4728                         stats->mgmt[MANAGEMENT_AUTH]++;
4729                         break;
4730                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
4731                         stats->mgmt[MANAGEMENT_DEAUTH]++;
4732                         break;
4733                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
4734                         stats->mgmt[MANAGEMENT_ACTION]++;
4735                         break;
4736                 }
4737         } else if (ieee80211_is_ctl(fc)) {
4738                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4739                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
4740                         stats->ctrl[CONTROL_BACK_REQ]++;
4741                         break;
4742                 case cpu_to_le16(IEEE80211_STYPE_BACK):
4743                         stats->ctrl[CONTROL_BACK]++;
4744                         break;
4745                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
4746                         stats->ctrl[CONTROL_PSPOLL]++;
4747                         break;
4748                 case cpu_to_le16(IEEE80211_STYPE_RTS):
4749                         stats->ctrl[CONTROL_RTS]++;
4750                         break;
4751                 case cpu_to_le16(IEEE80211_STYPE_CTS):
4752                         stats->ctrl[CONTROL_CTS]++;
4753                         break;
4754                 case cpu_to_le16(IEEE80211_STYPE_ACK):
4755                         stats->ctrl[CONTROL_ACK]++;
4756                         break;
4757                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
4758                         stats->ctrl[CONTROL_CFEND]++;
4759                         break;
4760                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
4761                         stats->ctrl[CONTROL_CFENDACK]++;
4762                         break;
4763                 }
4764         } else {
4765                 /* data */
4766                 stats->data_cnt++;
4767                 stats->data_bytes += len;
4768         }
4769 }
4770 EXPORT_SYMBOL(il_update_stats);
4771 #endif
4772
4773 int
4774 il_force_reset(struct il_priv *il, bool external)
4775 {
4776         struct il_force_reset *force_reset;
4777
4778         if (test_bit(S_EXIT_PENDING, &il->status))
4779                 return -EINVAL;
4780
4781         force_reset = &il->force_reset;
4782         force_reset->reset_request_count++;
4783         if (!external) {
4784                 if (force_reset->last_force_reset_jiffies &&
4785                     time_after(force_reset->last_force_reset_jiffies +
4786                                force_reset->reset_duration, jiffies)) {
4787                         D_INFO("force reset rejected\n");
4788                         force_reset->reset_reject_count++;
4789                         return -EAGAIN;
4790                 }
4791         }
4792         force_reset->reset_success_count++;
4793         force_reset->last_force_reset_jiffies = jiffies;
4794
4795         /*
4796          * if the request is from external(ex: debugfs),
4797          * then always perform the request in regardless the module
4798          * parameter setting
4799          * if the request is from internal (uCode error or driver
4800          * detect failure), then fw_restart module parameter
4801          * need to be check before performing firmware reload
4802          */
4803
4804         if (!external && !il->cfg->mod_params->restart_fw) {
4805                 D_INFO("Cancel firmware reload based on "
4806                        "module parameter setting\n");
4807                 return 0;
4808         }
4809
4810         IL_ERR("On demand firmware reload\n");
4811
4812         /* Set the FW error flag -- cleared on il_down */
4813         set_bit(S_FW_ERROR, &il->status);
4814         wake_up(&il->wait_command_queue);
4815         /*
4816          * Keep the restart process from trying to send host
4817          * commands by clearing the INIT status bit
4818          */
4819         clear_bit(S_READY, &il->status);
4820         queue_work(il->workqueue, &il->restart);
4821
4822         return 0;
4823 }
4824
4825 int
4826 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4827                         enum nl80211_iftype newtype, bool newp2p)
4828 {
4829         struct il_priv *il = hw->priv;
4830         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4831         u32 modes;
4832         int err;
4833
4834         newtype = ieee80211_iftype_p2p(newtype, newp2p);
4835
4836         mutex_lock(&il->mutex);
4837
4838         if (!ctx->vif || !il_is_ready_rf(il)) {
4839                 /*
4840                  * Huh? But wait ... this can maybe happen when
4841                  * we're in the middle of a firmware restart!
4842                  */
4843                 err = -EBUSY;
4844                 goto out;
4845         }
4846
4847         modes = ctx->interface_modes | ctx->exclusive_interface_modes;
4848         if (!(modes & BIT(newtype))) {
4849                 err = -EOPNOTSUPP;
4850                 goto out;
4851         }
4852
4853         if ((il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type)) ||
4854             (il->ctx.exclusive_interface_modes & BIT(newtype))) {
4855                 err = -EINVAL;
4856                 goto out;
4857         }
4858
4859         /* success */
4860         il_teardown_interface(il, vif, true);
4861         vif->type = newtype;
4862         vif->p2p = newp2p;
4863         err = il_setup_interface(il, ctx);
4864         WARN_ON(err);
4865         /*
4866          * We've switched internally, but submitting to the
4867          * device may have failed for some reason. Mask this
4868          * error, because otherwise mac80211 will not switch
4869          * (and set the interface type back) and we'll be
4870          * out of sync with it.
4871          */
4872         err = 0;
4873
4874 out:
4875         mutex_unlock(&il->mutex);
4876         return err;
4877 }
4878 EXPORT_SYMBOL(il_mac_change_interface);
4879
4880 /*
4881  * On every watchdog tick we check (latest) time stamp. If it does not
4882  * change during timeout period and queue is not empty we reset firmware.
4883  */
4884 static int
4885 il_check_stuck_queue(struct il_priv *il, int cnt)
4886 {
4887         struct il_tx_queue *txq = &il->txq[cnt];
4888         struct il_queue *q = &txq->q;
4889         unsigned long timeout;
4890         int ret;
4891
4892         if (q->read_ptr == q->write_ptr) {
4893                 txq->time_stamp = jiffies;
4894                 return 0;
4895         }
4896
4897         timeout =
4898             txq->time_stamp +
4899             msecs_to_jiffies(il->cfg->base_params->wd_timeout);
4900
4901         if (time_after(jiffies, timeout)) {
4902                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4903                        il->cfg->base_params->wd_timeout);
4904                 ret = il_force_reset(il, false);
4905                 return (ret == -EAGAIN) ? 0 : 1;
4906         }
4907
4908         return 0;
4909 }
4910
4911 /*
4912  * Making watchdog tick be a quarter of timeout assure we will
4913  * discover the queue hung between timeout and 1.25*timeout
4914  */
4915 #define IL_WD_TICK(timeout) ((timeout) / 4)
4916
4917 /*
4918  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4919  * we reset the firmware. If everything is fine just rearm the timer.
4920  */
4921 void
4922 il_bg_watchdog(unsigned long data)
4923 {
4924         struct il_priv *il = (struct il_priv *)data;
4925         int cnt;
4926         unsigned long timeout;
4927
4928         if (test_bit(S_EXIT_PENDING, &il->status))
4929                 return;
4930
4931         timeout = il->cfg->base_params->wd_timeout;
4932         if (timeout == 0)
4933                 return;
4934
4935         /* monitor and check for stuck cmd queue */
4936         if (il_check_stuck_queue(il, il->cmd_queue))
4937                 return;
4938
4939         /* monitor and check for other stuck queues */
4940         if (il_is_any_associated(il)) {
4941                 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4942                         /* skip as we already checked the command queue */
4943                         if (cnt == il->cmd_queue)
4944                                 continue;
4945                         if (il_check_stuck_queue(il, cnt))
4946                                 return;
4947                 }
4948         }
4949
4950         mod_timer(&il->watchdog,
4951                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4952 }
4953 EXPORT_SYMBOL(il_bg_watchdog);
4954
4955 void
4956 il_setup_watchdog(struct il_priv *il)
4957 {
4958         unsigned int timeout = il->cfg->base_params->wd_timeout;
4959
4960         if (timeout)
4961                 mod_timer(&il->watchdog,
4962                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4963         else
4964                 del_timer(&il->watchdog);
4965 }
4966 EXPORT_SYMBOL(il_setup_watchdog);
4967
4968 /*
4969  * extended beacon time format
4970  * time in usec will be changed into a 32-bit value in extended:internal format
4971  * the extended part is the beacon counts
4972  * the internal part is the time in usec within one beacon interval
4973  */
4974 u32
4975 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4976 {
4977         u32 quot;
4978         u32 rem;
4979         u32 interval = beacon_interval * TIME_UNIT;
4980
4981         if (!interval || !usec)
4982                 return 0;
4983
4984         quot =
4985             (usec /
4986              interval) & (il_beacon_time_mask_high(il,
4987                                                    il->hw_params.
4988                                                    beacon_time_tsf_bits) >> il->
4989                           hw_params.beacon_time_tsf_bits);
4990         rem =
4991             (usec % interval) & il_beacon_time_mask_low(il,
4992                                                         il->hw_params.
4993                                                         beacon_time_tsf_bits);
4994
4995         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4996 }
4997 EXPORT_SYMBOL(il_usecs_to_beacons);
4998
4999 /* base is usually what we get from ucode with each received frame,
5000  * the same as HW timer counter counting down
5001  */
5002 __le32
5003 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
5004                    u32 beacon_interval)
5005 {
5006         u32 base_low = base & il_beacon_time_mask_low(il,
5007                                                       il->hw_params.
5008                                                       beacon_time_tsf_bits);
5009         u32 addon_low = addon & il_beacon_time_mask_low(il,
5010                                                         il->hw_params.
5011                                                         beacon_time_tsf_bits);
5012         u32 interval = beacon_interval * TIME_UNIT;
5013         u32 res = (base & il_beacon_time_mask_high(il,
5014                                                    il->hw_params.
5015                                                    beacon_time_tsf_bits)) +
5016             (addon & il_beacon_time_mask_high(il,
5017                                               il->hw_params.
5018                                               beacon_time_tsf_bits));
5019
5020         if (base_low > addon_low)
5021                 res += base_low - addon_low;
5022         else if (base_low < addon_low) {
5023                 res += interval + base_low - addon_low;
5024                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5025         } else
5026                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5027
5028         return cpu_to_le32(res);
5029 }
5030 EXPORT_SYMBOL(il_add_beacon_time);
5031
5032 #ifdef CONFIG_PM
5033
5034 int
5035 il_pci_suspend(struct device *device)
5036 {
5037         struct pci_dev *pdev = to_pci_dev(device);
5038         struct il_priv *il = pci_get_drvdata(pdev);
5039
5040         /*
5041          * This function is called when system goes into suspend state
5042          * mac80211 will call il_mac_stop() from the mac80211 suspend function
5043          * first but since il_mac_stop() has no knowledge of who the caller is,
5044          * it will not call apm_ops.stop() to stop the DMA operation.
5045          * Calling apm_ops.stop here to make sure we stop the DMA.
5046          */
5047         il_apm_stop(il);
5048
5049         return 0;
5050 }
5051 EXPORT_SYMBOL(il_pci_suspend);
5052
5053 int
5054 il_pci_resume(struct device *device)
5055 {
5056         struct pci_dev *pdev = to_pci_dev(device);
5057         struct il_priv *il = pci_get_drvdata(pdev);
5058         bool hw_rfkill = false;
5059
5060         /*
5061          * We disable the RETRY_TIMEOUT register (0x41) to keep
5062          * PCI Tx retries from interfering with C3 CPU state.
5063          */
5064         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
5065
5066         il_enable_interrupts(il);
5067
5068         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5069                 hw_rfkill = true;
5070
5071         if (hw_rfkill)
5072                 set_bit(S_RF_KILL_HW, &il->status);
5073         else
5074                 clear_bit(S_RF_KILL_HW, &il->status);
5075
5076         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
5077
5078         return 0;
5079 }
5080 EXPORT_SYMBOL(il_pci_resume);
5081
5082 const struct dev_pm_ops il_pm_ops = {
5083         .suspend = il_pci_suspend,
5084         .resume = il_pci_resume,
5085         .freeze = il_pci_suspend,
5086         .thaw = il_pci_resume,
5087         .poweroff = il_pci_suspend,
5088         .restore = il_pci_resume,
5089 };
5090 EXPORT_SYMBOL(il_pm_ops);
5091
5092 #endif /* CONFIG_PM */
5093
5094 static void
5095 il_update_qos(struct il_priv *il, struct il_rxon_context *ctx)
5096 {
5097         if (test_bit(S_EXIT_PENDING, &il->status))
5098                 return;
5099
5100         if (!ctx->is_active)
5101                 return;
5102
5103         ctx->qos_data.def_qos_parm.qos_flags = 0;
5104
5105         if (ctx->qos_data.qos_active)
5106                 ctx->qos_data.def_qos_parm.qos_flags |=
5107                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5108
5109         if (ctx->ht.enabled)
5110                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5111
5112         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5113               ctx->qos_data.qos_active, ctx->qos_data.def_qos_parm.qos_flags);
5114
5115         il_send_cmd_pdu_async(il, ctx->qos_cmd, sizeof(struct il_qosparam_cmd),
5116                               &ctx->qos_data.def_qos_parm, NULL);
5117 }
5118
5119 /**
5120  * il_mac_config - mac80211 config callback
5121  */
5122 int
5123 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5124 {
5125         struct il_priv *il = hw->priv;
5126         const struct il_channel_info *ch_info;
5127         struct ieee80211_conf *conf = &hw->conf;
5128         struct ieee80211_channel *channel = conf->channel;
5129         struct il_ht_config *ht_conf = &il->current_ht_config;
5130         struct il_rxon_context *ctx = &il->ctx;
5131         unsigned long flags = 0;
5132         int ret = 0;
5133         u16 ch;
5134         int scan_active = 0;
5135         bool ht_changed = false;
5136
5137         if (WARN_ON(!il->cfg->ops->legacy))
5138                 return -EOPNOTSUPP;
5139
5140         mutex_lock(&il->mutex);
5141
5142         D_MAC80211("enter to channel %d changed 0x%X\n", channel->hw_value,
5143                    changed);
5144
5145         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5146                 scan_active = 1;
5147                 D_MAC80211("scan active\n");
5148         }
5149
5150         if (changed &
5151             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5152                 /* mac80211 uses static for non-HT which is what we want */
5153                 il->current_ht_config.smps = conf->smps_mode;
5154
5155                 /*
5156                  * Recalculate chain counts.
5157                  *
5158                  * If monitor mode is enabled then mac80211 will
5159                  * set up the SM PS mode to OFF if an HT channel is
5160                  * configured.
5161                  */
5162                 if (il->cfg->ops->hcmd->set_rxon_chain)
5163                         il->cfg->ops->hcmd->set_rxon_chain(il, &il->ctx);
5164         }
5165
5166         /* during scanning mac80211 will delay channel setting until
5167          * scan finish with changed = 0
5168          */
5169         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5170
5171                 if (scan_active)
5172                         goto set_ch_out;
5173
5174                 ch = channel->hw_value;
5175                 ch_info = il_get_channel_info(il, channel->band, ch);
5176                 if (!il_is_channel_valid(ch_info)) {
5177                         D_MAC80211("leave - invalid channel\n");
5178                         ret = -EINVAL;
5179                         goto set_ch_out;
5180                 }
5181
5182                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5183                     !il_is_channel_ibss(ch_info)) {
5184                         D_MAC80211("leave - not IBSS channel\n");
5185                         ret = -EINVAL;
5186                         goto set_ch_out;
5187                 }
5188
5189                 spin_lock_irqsave(&il->lock, flags);
5190
5191                 /* Configure HT40 channels */
5192                 if (ctx->ht.enabled != conf_is_ht(conf)) {
5193                         ctx->ht.enabled = conf_is_ht(conf);
5194                         ht_changed = true;
5195                 }
5196                 if (ctx->ht.enabled) {
5197                         if (conf_is_ht40_minus(conf)) {
5198                                 ctx->ht.extension_chan_offset =
5199                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5200                                 ctx->ht.is_40mhz = true;
5201                         } else if (conf_is_ht40_plus(conf)) {
5202                                 ctx->ht.extension_chan_offset =
5203                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5204                                 ctx->ht.is_40mhz = true;
5205                         } else {
5206                                 ctx->ht.extension_chan_offset =
5207                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5208                                 ctx->ht.is_40mhz = false;
5209                         }
5210                 } else
5211                         ctx->ht.is_40mhz = false;
5212
5213                 /*
5214                  * Default to no protection. Protection mode will
5215                  * later be set from BSS config in il_ht_conf
5216                  */
5217                 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5218
5219                 /* if we are switching from ht to 2.4 clear flags
5220                  * from any ht related info since 2.4 does not
5221                  * support ht */
5222                 if ((le16_to_cpu(ctx->staging.channel) != ch))
5223                         ctx->staging.flags = 0;
5224
5225                 il_set_rxon_channel(il, channel, ctx);
5226                 il_set_rxon_ht(il, ht_conf);
5227
5228                 il_set_flags_for_band(il, ctx, channel->band, ctx->vif);
5229
5230                 spin_unlock_irqrestore(&il->lock, flags);
5231
5232                 if (il->cfg->ops->legacy->update_bcast_stations)
5233                         ret = il->cfg->ops->legacy->update_bcast_stations(il);
5234
5235 set_ch_out:
5236                 /* The list of supported rates and rate mask can be different
5237                  * for each band; since the band may have changed, reset
5238                  * the rate mask to what mac80211 lists */
5239                 il_set_rate(il);
5240         }
5241
5242         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5243                 ret = il_power_update_mode(il, false);
5244                 if (ret)
5245                         D_MAC80211("Error setting sleep level\n");
5246         }
5247
5248         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5249                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5250                            conf->power_level);
5251
5252                 il_set_tx_power(il, conf->power_level, false);
5253         }
5254
5255         if (!il_is_ready(il)) {
5256                 D_MAC80211("leave - not ready\n");
5257                 goto out;
5258         }
5259
5260         if (scan_active)
5261                 goto out;
5262
5263         if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
5264                 il_commit_rxon(il, ctx);
5265         else
5266                 D_INFO("Not re-sending same RXON configuration.\n");
5267         if (ht_changed)
5268                 il_update_qos(il, ctx);
5269
5270 out:
5271         D_MAC80211("leave\n");
5272         mutex_unlock(&il->mutex);
5273         return ret;
5274 }
5275 EXPORT_SYMBOL(il_mac_config);
5276
5277 void
5278 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5279 {
5280         struct il_priv *il = hw->priv;
5281         unsigned long flags;
5282         struct il_rxon_context *ctx = &il->ctx;
5283
5284         if (WARN_ON(!il->cfg->ops->legacy))
5285                 return;
5286
5287         mutex_lock(&il->mutex);
5288         D_MAC80211("enter\n");
5289
5290         spin_lock_irqsave(&il->lock, flags);
5291         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5292         spin_unlock_irqrestore(&il->lock, flags);
5293
5294         spin_lock_irqsave(&il->lock, flags);
5295
5296         /* new association get rid of ibss beacon skb */
5297         if (il->beacon_skb)
5298                 dev_kfree_skb(il->beacon_skb);
5299
5300         il->beacon_skb = NULL;
5301
5302         il->timestamp = 0;
5303
5304         spin_unlock_irqrestore(&il->lock, flags);
5305
5306         il_scan_cancel_timeout(il, 100);
5307         if (!il_is_ready_rf(il)) {
5308                 D_MAC80211("leave - not ready\n");
5309                 mutex_unlock(&il->mutex);
5310                 return;
5311         }
5312
5313         /* we are restarting association process
5314          * clear RXON_FILTER_ASSOC_MSK bit
5315          */
5316         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5317         il_commit_rxon(il, ctx);
5318
5319         il_set_rate(il);
5320
5321         mutex_unlock(&il->mutex);
5322
5323         D_MAC80211("leave\n");
5324 }
5325 EXPORT_SYMBOL(il_mac_reset_tsf);
5326
5327 static void
5328 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5329 {
5330         struct il_ht_config *ht_conf = &il->current_ht_config;
5331         struct ieee80211_sta *sta;
5332         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5333         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5334
5335         D_ASSOC("enter:\n");
5336
5337         if (!ctx->ht.enabled)
5338                 return;
5339
5340         ctx->ht.protection =
5341             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5342         ctx->ht.non_gf_sta_present =
5343             !!(bss_conf->
5344                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5345
5346         ht_conf->single_chain_sufficient = false;
5347
5348         switch (vif->type) {
5349         case NL80211_IFTYPE_STATION:
5350                 rcu_read_lock();
5351                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5352                 if (sta) {
5353                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5354                         int maxstreams;
5355
5356                         maxstreams =
5357                             (ht_cap->mcs.
5358                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5359                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5360                         maxstreams += 1;
5361
5362                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5363                             ht_cap->mcs.rx_mask[2] == 0)
5364                                 ht_conf->single_chain_sufficient = true;
5365                         if (maxstreams <= 1)
5366                                 ht_conf->single_chain_sufficient = true;
5367                 } else {
5368                         /*
5369                          * If at all, this can only happen through a race
5370                          * when the AP disconnects us while we're still
5371                          * setting up the connection, in that case mac80211
5372                          * will soon tell us about that.
5373                          */
5374                         ht_conf->single_chain_sufficient = true;
5375                 }
5376                 rcu_read_unlock();
5377                 break;
5378         case NL80211_IFTYPE_ADHOC:
5379                 ht_conf->single_chain_sufficient = true;
5380                 break;
5381         default:
5382                 break;
5383         }
5384
5385         D_ASSOC("leave\n");
5386 }
5387
5388 static inline void
5389 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5390 {
5391         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5392
5393         /*
5394          * inform the ucode that there is no longer an
5395          * association and that no more packets should be
5396          * sent
5397          */
5398         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5399         ctx->staging.assoc_id = 0;
5400         il_commit_rxon(il, ctx);
5401 }
5402
5403 static void
5404 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5405 {
5406         struct il_priv *il = hw->priv;
5407         unsigned long flags;
5408         __le64 timestamp;
5409         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5410
5411         if (!skb)
5412                 return;
5413
5414         D_MAC80211("enter\n");
5415
5416         lockdep_assert_held(&il->mutex);
5417
5418         if (!il->beacon_ctx) {
5419                 IL_ERR("update beacon but no beacon context!\n");
5420                 dev_kfree_skb(skb);
5421                 return;
5422         }
5423
5424         spin_lock_irqsave(&il->lock, flags);
5425
5426         if (il->beacon_skb)
5427                 dev_kfree_skb(il->beacon_skb);
5428
5429         il->beacon_skb = skb;
5430
5431         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5432         il->timestamp = le64_to_cpu(timestamp);
5433
5434         D_MAC80211("leave\n");
5435         spin_unlock_irqrestore(&il->lock, flags);
5436
5437         if (!il_is_ready_rf(il)) {
5438                 D_MAC80211("leave - RF not ready\n");
5439                 return;
5440         }
5441
5442         il->cfg->ops->legacy->post_associate(il);
5443 }
5444
5445 void
5446 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5447                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5448 {
5449         struct il_priv *il = hw->priv;
5450         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5451         int ret;
5452
5453         if (WARN_ON(!il->cfg->ops->legacy))
5454                 return;
5455
5456         D_MAC80211("changes = 0x%X\n", changes);
5457
5458         mutex_lock(&il->mutex);
5459
5460         if (!il_is_alive(il)) {
5461                 mutex_unlock(&il->mutex);
5462                 return;
5463         }
5464
5465         if (changes & BSS_CHANGED_QOS) {
5466                 unsigned long flags;
5467
5468                 spin_lock_irqsave(&il->lock, flags);
5469                 ctx->qos_data.qos_active = bss_conf->qos;
5470                 il_update_qos(il, ctx);
5471                 spin_unlock_irqrestore(&il->lock, flags);
5472         }
5473
5474         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5475                 /*
5476                  * the add_interface code must make sure we only ever
5477                  * have a single interface that could be beaconing at
5478                  * any time.
5479                  */
5480                 if (vif->bss_conf.enable_beacon)
5481                         il->beacon_ctx = ctx;
5482                 else
5483                         il->beacon_ctx = NULL;
5484         }
5485
5486         if (changes & BSS_CHANGED_BSSID) {
5487                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5488
5489                 /*
5490                  * If there is currently a HW scan going on in the
5491                  * background then we need to cancel it else the RXON
5492                  * below/in post_associate will fail.
5493                  */
5494                 if (il_scan_cancel_timeout(il, 100)) {
5495                         IL_WARN("Aborted scan still in progress after 100ms\n");
5496                         D_MAC80211("leaving - scan abort failed.\n");
5497                         mutex_unlock(&il->mutex);
5498                         return;
5499                 }
5500
5501                 /* mac80211 only sets assoc when in STATION mode */
5502                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
5503                         memcpy(ctx->staging.bssid_addr, bss_conf->bssid,
5504                                ETH_ALEN);
5505
5506                         /* currently needed in a few places */
5507                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5508                 } else {
5509                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5510                 }
5511
5512         }
5513
5514         /*
5515          * This needs to be after setting the BSSID in case
5516          * mac80211 decides to do both changes at once because
5517          * it will invoke post_associate.
5518          */
5519         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5520                 il_beacon_update(hw, vif);
5521
5522         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5523                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5524                 if (bss_conf->use_short_preamble)
5525                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5526                 else
5527                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5528         }
5529
5530         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5531                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5532                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5533                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5534                 else
5535                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5536                 if (bss_conf->use_cts_prot)
5537                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
5538                 else
5539                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5540         }
5541
5542         if (changes & BSS_CHANGED_BASIC_RATES) {
5543                 /* XXX use this information
5544                  *
5545                  * To do that, remove code from il_set_rate() and put something
5546                  * like this here:
5547                  *
5548                  if (A-band)
5549                  ctx->staging.ofdm_basic_rates =
5550                  bss_conf->basic_rates;
5551                  else
5552                  ctx->staging.ofdm_basic_rates =
5553                  bss_conf->basic_rates >> 4;
5554                  ctx->staging.cck_basic_rates =
5555                  bss_conf->basic_rates & 0xF;
5556                  */
5557         }
5558
5559         if (changes & BSS_CHANGED_HT) {
5560                 il_ht_conf(il, vif);
5561
5562                 if (il->cfg->ops->hcmd->set_rxon_chain)
5563                         il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
5564         }
5565
5566         if (changes & BSS_CHANGED_ASSOC) {
5567                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5568                 if (bss_conf->assoc) {
5569                         il->timestamp = bss_conf->timestamp;
5570
5571                         if (!il_is_rfkill(il))
5572                                 il->cfg->ops->legacy->post_associate(il);
5573                 } else
5574                         il_set_no_assoc(il, vif);
5575         }
5576
5577         if (changes && il_is_associated_ctx(ctx) && bss_conf->aid) {
5578                 D_MAC80211("Changes (%#x) while associated\n", changes);
5579                 ret = il_send_rxon_assoc(il, ctx);
5580                 if (!ret) {
5581                         /* Sync active_rxon with latest change. */
5582                         memcpy((void *)&ctx->active, &ctx->staging,
5583                                sizeof(struct il_rxon_cmd));
5584                 }
5585         }
5586
5587         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5588                 if (vif->bss_conf.enable_beacon) {
5589                         memcpy(ctx->staging.bssid_addr, bss_conf->bssid,
5590                                ETH_ALEN);
5591                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5592                         il->cfg->ops->legacy->config_ap(il);
5593                 } else
5594                         il_set_no_assoc(il, vif);
5595         }
5596
5597         if (changes & BSS_CHANGED_IBSS) {
5598                 ret =
5599                     il->cfg->ops->legacy->manage_ibss_station(il, vif,
5600                                                               bss_conf->
5601                                                               ibss_joined);
5602                 if (ret)
5603                         IL_ERR("failed to %s IBSS station %pM\n",
5604                                bss_conf->ibss_joined ? "add" : "remove",
5605                                bss_conf->bssid);
5606         }
5607
5608         mutex_unlock(&il->mutex);
5609
5610         D_MAC80211("leave\n");
5611 }
5612 EXPORT_SYMBOL(il_mac_bss_info_changed);
5613
5614 irqreturn_t
5615 il_isr(int irq, void *data)
5616 {
5617         struct il_priv *il = data;
5618         u32 inta, inta_mask;
5619         u32 inta_fh;
5620         unsigned long flags;
5621         if (!il)
5622                 return IRQ_NONE;
5623
5624         spin_lock_irqsave(&il->lock, flags);
5625
5626         /* Disable (but don't clear!) interrupts here to avoid
5627          *    back-to-back ISRs and sporadic interrupts from our NIC.
5628          * If we have something to service, the tasklet will re-enable ints.
5629          * If we *don't* have something, we'll re-enable before leaving here. */
5630         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5631         _il_wr(il, CSR_INT_MASK, 0x00000000);
5632
5633         /* Discover which interrupts are active/pending */
5634         inta = _il_rd(il, CSR_INT);
5635         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5636
5637         /* Ignore interrupt if there's nothing in NIC to service.
5638          * This may be due to IRQ shared with another device,
5639          * or due to sporadic interrupts thrown from our NIC. */
5640         if (!inta && !inta_fh) {
5641                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5642                 goto none;
5643         }
5644
5645         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5646                 /* Hardware disappeared. It might have already raised
5647                  * an interrupt */
5648                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5649                 goto unplugged;
5650         }
5651
5652         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5653               inta_fh);
5654
5655         inta &= ~CSR_INT_BIT_SCD;
5656
5657         /* il_irq_tasklet() will service interrupts and re-enable them */
5658         if (likely(inta || inta_fh))
5659                 tasklet_schedule(&il->irq_tasklet);
5660
5661 unplugged:
5662         spin_unlock_irqrestore(&il->lock, flags);
5663         return IRQ_HANDLED;
5664
5665 none:
5666         /* re-enable interrupts here since we don't have anything to service. */
5667         /* only Re-enable if disabled by irq */
5668         if (test_bit(S_INT_ENABLED, &il->status))
5669                 il_enable_interrupts(il);
5670         spin_unlock_irqrestore(&il->lock, flags);
5671         return IRQ_NONE;
5672 }
5673 EXPORT_SYMBOL(il_isr);
5674
5675 /*
5676  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5677  *  function.
5678  */
5679 void
5680 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5681                      __le16 fc, __le32 *tx_flags)
5682 {
5683         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5684                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5685                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5686                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5687
5688                 if (!ieee80211_is_mgmt(fc))
5689                         return;
5690
5691                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5692                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5693                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5694                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5695                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5696                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5697                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5698                         break;
5699                 }
5700         } else if (info->control.rates[0].
5701                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5702                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5703                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5704                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5705         }
5706 }
5707 EXPORT_SYMBOL(il_tx_cmd_protection);