drivers/net/wireless/intel/iwlegacy/common.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   5  *
   6  * Contact Information:
   7  *  Intel Linux Wireless <ilw@linux.intel.com>
   8  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   9  *****************************************************************************/
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/sched.h>
  15 #include <linux/slab.h>
  16 #include <linux/types.h>
  17 #include <linux/lockdep.h>
  18 #include <linux/pci.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/delay.h>
  21 #include <linux/skbuff.h>
  22 #include <net/mac80211.h>
  23
  24 #include "common.h"
  25
  26 int
  27 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
  28 {
  29         const int interval = 10; /* microseconds */
  30         int t = 0;
  31
  32         do {
  33                 if ((_il_rd(il, addr) & mask) == (bits & mask))
  34                         return t;
  35                 udelay(interval);
  36                 t += interval;
  37         } while (t < timeout);
  38
  39         return -ETIMEDOUT;
  40 }
  41 EXPORT_SYMBOL(_il_poll_bit);
  42
  43 void
  44 il_set_bit(struct il_priv *p, u32 r, u32 m)
  45 {
  46         unsigned long reg_flags;
  47
  48         spin_lock_irqsave(&p->reg_lock, reg_flags);
  49         _il_set_bit(p, r, m);
  50         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  51 }
  52 EXPORT_SYMBOL(il_set_bit);
  53
  54 void
  55 il_clear_bit(struct il_priv *p, u32 r, u32 m)
  56 {
  57         unsigned long reg_flags;
  58
  59         spin_lock_irqsave(&p->reg_lock, reg_flags);
  60         _il_clear_bit(p, r, m);
  61         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  62 }
  63 EXPORT_SYMBOL(il_clear_bit);
  64
  65 bool
  66 _il_grab_nic_access(struct il_priv *il)
  67 {
  68         int ret;
  69         u32 val;
  70
  71         /* this bit wakes up the NIC */
  72         _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
  73
  74         /*
  75          * These bits say the device is running, and should keep running for
  76          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
  77          * but they do not indicate that embedded SRAM is restored yet;
  78          * 3945 and 4965 have volatile SRAM, and must save/restore contents
  79          * to/from host DRAM when sleeping/waking for power-saving.
  80          * Each direction takes approximately 1/4 millisecond; with this
  81          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
  82          * series of register accesses are expected (e.g. reading Event Log),
  83          * to keep device from sleeping.
  84          *
  85          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
  86          * SRAM is okay/restored.  We don't check that here because this call
  87          * is just for hardware register access; but GP1 MAC_SLEEP check is a
  88          * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
  89          *
  90          */
  91         ret =
  92             _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
  93                          (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
  94                           CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
  95         if (unlikely(ret < 0)) {
  96                 val = _il_rd(il, CSR_GP_CNTRL);
  97                 WARN_ONCE(1, "Timeout waiting for ucode processor access "
  98                              "(CSR_GP_CNTRL 0x%08x)\n", val);
  99                 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 100                 return false;
 101         }
 102
 103         return true;
 104 }
 105 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
 106
 107 int
 108 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
 109 {
 110         const int interval = 10; /* microseconds */
 111         int t = 0;
 112
 113         do {
 114                 if ((il_rd(il, addr) & mask) == mask)
 115                         return t;
 116                 udelay(interval);
 117                 t += interval;
 118         } while (t < timeout);
 119
 120         return -ETIMEDOUT;
 121 }
 122 EXPORT_SYMBOL(il_poll_bit);
 123
 124 u32
 125 il_rd_prph(struct il_priv *il, u32 reg)
 126 {
 127         unsigned long reg_flags;
 128         u32 val;
 129
 130         spin_lock_irqsave(&il->reg_lock, reg_flags);
 131         _il_grab_nic_access(il);
 132         val = _il_rd_prph(il, reg);
 133         _il_release_nic_access(il);
 134         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 135         return val;
 136 }
 137 EXPORT_SYMBOL(il_rd_prph);
 138
 139 void
 140 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
 141 {
 142         unsigned long reg_flags;
 143
 144         spin_lock_irqsave(&il->reg_lock, reg_flags);
 145         if (likely(_il_grab_nic_access(il))) {
 146                 _il_wr_prph(il, addr, val);
 147                 _il_release_nic_access(il);
 148         }
 149         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 150 }
 151 EXPORT_SYMBOL(il_wr_prph);
 152
 153 u32
 154 il_read_targ_mem(struct il_priv *il, u32 addr)
 155 {
 156         unsigned long reg_flags;
 157         u32 value;
 158
 159         spin_lock_irqsave(&il->reg_lock, reg_flags);
 160         _il_grab_nic_access(il);
 161
 162         _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
 163         value = _il_rd(il, HBUS_TARG_MEM_RDAT);
 164
 165         _il_release_nic_access(il);
 166         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 167         return value;
 168 }
 169 EXPORT_SYMBOL(il_read_targ_mem);
 170
 171 void
 172 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
 173 {
 174         unsigned long reg_flags;
 175
 176         spin_lock_irqsave(&il->reg_lock, reg_flags);
 177         if (likely(_il_grab_nic_access(il))) {
 178                 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
 179                 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
 180                 _il_release_nic_access(il);
 181         }
 182         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 183 }
 184 EXPORT_SYMBOL(il_write_targ_mem);
 185
 186 const char *
 187 il_get_cmd_string(u8 cmd)
 188 {
 189         switch (cmd) {
 190                 IL_CMD(N_ALIVE);
 191                 IL_CMD(N_ERROR);
 192                 IL_CMD(C_RXON);
 193                 IL_CMD(C_RXON_ASSOC);
 194                 IL_CMD(C_QOS_PARAM);
 195                 IL_CMD(C_RXON_TIMING);
 196                 IL_CMD(C_ADD_STA);
 197                 IL_CMD(C_REM_STA);
 198                 IL_CMD(C_WEPKEY);
 199                 IL_CMD(N_3945_RX);
 200                 IL_CMD(C_TX);
 201                 IL_CMD(C_RATE_SCALE);
 202                 IL_CMD(C_LEDS);
 203                 IL_CMD(C_TX_LINK_QUALITY_CMD);
 204                 IL_CMD(C_CHANNEL_SWITCH);
 205                 IL_CMD(N_CHANNEL_SWITCH);
 206                 IL_CMD(C_SPECTRUM_MEASUREMENT);
 207                 IL_CMD(N_SPECTRUM_MEASUREMENT);
 208                 IL_CMD(C_POWER_TBL);
 209                 IL_CMD(N_PM_SLEEP);
 210                 IL_CMD(N_PM_DEBUG_STATS);
 211                 IL_CMD(C_SCAN);
 212                 IL_CMD(C_SCAN_ABORT);
 213                 IL_CMD(N_SCAN_START);
 214                 IL_CMD(N_SCAN_RESULTS);
 215                 IL_CMD(N_SCAN_COMPLETE);
 216                 IL_CMD(N_BEACON);
 217                 IL_CMD(C_TX_BEACON);
 218                 IL_CMD(C_TX_PWR_TBL);
 219                 IL_CMD(C_BT_CONFIG);
 220                 IL_CMD(C_STATS);
 221                 IL_CMD(N_STATS);
 222                 IL_CMD(N_CARD_STATE);
 223                 IL_CMD(N_MISSED_BEACONS);
 224                 IL_CMD(C_CT_KILL_CONFIG);
 225                 IL_CMD(C_SENSITIVITY);
 226                 IL_CMD(C_PHY_CALIBRATION);
 227                 IL_CMD(N_RX_PHY);
 228                 IL_CMD(N_RX_MPDU);
 229                 IL_CMD(N_RX);
 230                 IL_CMD(N_COMPRESSED_BA);
 231         default:
 232                 return "UNKNOWN";
 233
 234         }
 235 }
 236 EXPORT_SYMBOL(il_get_cmd_string);
 237
 238 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 239
 240 static void
 241 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
 242                         struct il_rx_pkt *pkt)
 243 {
 244         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 245                 IL_ERR("Bad return from %s (0x%08X)\n",
 246                        il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 247                 return;
 248         }
 249 #ifdef CONFIG_IWLEGACY_DEBUG
 250         switch (cmd->hdr.cmd) {
 251         case C_TX_LINK_QUALITY_CMD:
 252         case C_SENSITIVITY:
 253                 D_HC_DUMP("back from %s (0x%08X)\n",
 254                           il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 255                 break;
 256         default:
 257                 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
 258                      pkt->hdr.flags);
 259         }
 260 #endif
 261 }
 262
 263 static int
 264 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 265 {
 266         int ret;
 267
 268         BUG_ON(!(cmd->flags & CMD_ASYNC));
 269
 270         /* An asynchronous command can not expect an SKB to be set. */
 271         BUG_ON(cmd->flags & CMD_WANT_SKB);
 272
 273         /* Assign a generic callback if one is not provided */
 274         if (!cmd->callback)
 275                 cmd->callback = il_generic_cmd_callback;
 276
 277         if (test_bit(S_EXIT_PENDING, &il->status))
 278                 return -EBUSY;
 279
 280         ret = il_enqueue_hcmd(il, cmd);
 281         if (ret < 0) {
 282                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 283                        il_get_cmd_string(cmd->id), ret);
 284                 return ret;
 285         }
 286         return 0;
 287 }
 288
 289 int
 290 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 291 {
 292         int cmd_idx;
 293         int ret;
 294
 295         lockdep_assert_held(&il->mutex);
 296
 297         BUG_ON(cmd->flags & CMD_ASYNC);
 298
 299         /* A synchronous command can not have a callback set. */
 300         BUG_ON(cmd->callback);
 301
 302         D_INFO("Attempting to send sync command %s\n",
 303                il_get_cmd_string(cmd->id));
 304
 305         set_bit(S_HCMD_ACTIVE, &il->status);
 306         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 307                il_get_cmd_string(cmd->id));
 308
 309         cmd_idx = il_enqueue_hcmd(il, cmd);
 310         if (cmd_idx < 0) {
 311                 ret = cmd_idx;
 312                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 313                        il_get_cmd_string(cmd->id), ret);
 314                 goto out;
 315         }
 316
 317         ret = wait_event_timeout(il->wait_command_queue,
 318                                  !test_bit(S_HCMD_ACTIVE, &il->status),
 319                                  HOST_COMPLETE_TIMEOUT);
 320         if (!ret) {
 321                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 322                         IL_ERR("Error sending %s: time out after %dms.\n",
 323                                il_get_cmd_string(cmd->id),
 324                                jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 325
 326                         clear_bit(S_HCMD_ACTIVE, &il->status);
 327                         D_INFO("Clearing HCMD_ACTIVE for command %s\n",
 328                                il_get_cmd_string(cmd->id));
 329                         ret = -ETIMEDOUT;
 330                         goto cancel;
 331                 }
 332         }
 333
 334         if (test_bit(S_RFKILL, &il->status)) {
 335                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 336                        il_get_cmd_string(cmd->id));
 337                 ret = -ECANCELED;
 338                 goto fail;
 339         }
 340         if (test_bit(S_FW_ERROR, &il->status)) {
 341                 IL_ERR("Command %s failed: FW Error\n",
 342                        il_get_cmd_string(cmd->id));
 343                 ret = -EIO;
 344                 goto fail;
 345         }
 346         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 347                 IL_ERR("Error: Response NULL in '%s'\n",
 348                        il_get_cmd_string(cmd->id));
 349                 ret = -EIO;
 350                 goto cancel;
 351         }
 352
 353         ret = 0;
 354         goto out;
 355
 356 cancel:
 357         if (cmd->flags & CMD_WANT_SKB) {
 358                 /*
 359                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 360                  * TX cmd queue. Otherwise in case the cmd comes
 361                  * in later, it will possibly set an invalid
 362                  * address (cmd->meta.source).
 363                  */
 364                 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
 365         }
 366 fail:
 367         if (cmd->reply_page) {
 368                 il_free_pages(il, cmd->reply_page);
 369                 cmd->reply_page = 0;
 370         }
 371 out:
 372         return ret;
 373 }
 374 EXPORT_SYMBOL(il_send_cmd_sync);
 375
 376 int
 377 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 378 {
 379         if (cmd->flags & CMD_ASYNC)
 380                 return il_send_cmd_async(il, cmd);
 381
 382         return il_send_cmd_sync(il, cmd);
 383 }
 384 EXPORT_SYMBOL(il_send_cmd);
 385
 386 int
 387 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 388 {
 389         struct il_host_cmd cmd = {
 390                 .id = id,
 391                 .len = len,
 392                 .data = data,
 393         };
 394
 395         return il_send_cmd_sync(il, &cmd);
 396 }
 397 EXPORT_SYMBOL(il_send_cmd_pdu);
 398
 399 int
 400 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
 401                       void (*callback) (struct il_priv *il,
 402                                         struct il_device_cmd *cmd,
 403                                         struct il_rx_pkt *pkt))
 404 {
 405         struct il_host_cmd cmd = {
 406                 .id = id,
 407                 .len = len,
 408                 .data = data,
 409         };
 410
 411         cmd.flags |= CMD_ASYNC;
 412         cmd.callback = callback;
 413
 414         return il_send_cmd_async(il, &cmd);
 415 }
 416 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 417
 418 /* default: IL_LED_BLINK(0) using blinking idx table */
 419 static int led_mode;
 420 module_param(led_mode, int, 0444);
 421 MODULE_PARM_DESC(led_mode,
 422                  "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
 423
 424 /* Throughput           OFF time(ms)    ON time (ms)
 425  *      >300                    25              25
 426  *      >200 to 300             40              40
 427  *      >100 to 200             55              55
 428  *      >70 to 100              65              65
 429  *      >50 to 70               75              75
 430  *      >20 to 50               85              85
 431  *      >10 to 20               95              95
 432  *      >5 to 10                110             110
 433  *      >1 to 5                 130             130
 434  *      >0 to 1                 167             167
 435  *      <=0                                     SOLID ON
 436  */
 437 static const struct ieee80211_tpt_blink il_blink[] = {
 438         {.throughput = 0,               .blink_time = 334},
 439         {.throughput = 1 * 1024 - 1,    .blink_time = 260},
 440         {.throughput = 5 * 1024 - 1,    .blink_time = 220},
 441         {.throughput = 10 * 1024 - 1,   .blink_time = 190},
 442         {.throughput = 20 * 1024 - 1,   .blink_time = 170},
 443         {.throughput = 50 * 1024 - 1,   .blink_time = 150},
 444         {.throughput = 70 * 1024 - 1,   .blink_time = 130},
 445         {.throughput = 100 * 1024 - 1,  .blink_time = 110},
 446         {.throughput = 200 * 1024 - 1,  .blink_time = 80},
 447         {.throughput = 300 * 1024 - 1,  .blink_time = 50},
 448 };
 449
 450 /*
 451  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 452  * Led blink rate analysis showed an average deviation of 0% on 3945,
 453  * 5% on 4965 HW.
 454  * Need to compensate on the led on/off time per HW according to the deviation
 455  * to achieve the desired led frequency
 456  * The calculation is: (100-averageDeviation)/100 * blinkTime
 457  * For code efficiency the calculation will be:
 458  *     compensation = (100 - averageDeviation) * 64 / 100
 459  *     NewBlinkTime = (compensation * BlinkTime) / 64
 460  */
 461 static inline u8
 462 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
 463 {
 464         if (!compensation) {
 465                 IL_ERR("undefined blink compensation: "
 466                        "use pre-defined blinking time\n");
 467                 return time;
 468         }
 469
 470         return (u8) ((time * compensation) >> 6);
 471 }
 472
 473 /* Set led pattern command */
 474 static int
 475 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
 476 {
 477         struct il_led_cmd led_cmd = {
 478                 .id = IL_LED_LINK,
 479                 .interval = IL_DEF_LED_INTRVL
 480         };
 481         int ret;
 482
 483         if (!test_bit(S_READY, &il->status))
 484                 return -EBUSY;
 485
 486         if (il->blink_on == on && il->blink_off == off)
 487                 return 0;
 488
 489         if (off == 0) {
 490                 /* led is SOLID_ON */
 491                 on = IL_LED_SOLID;
 492         }
 493
 494         D_LED("Led blink time compensation=%u\n",
 495               il->cfg->led_compensation);
 496         led_cmd.on =
 497             il_blink_compensation(il, on,
 498                                   il->cfg->led_compensation);
 499         led_cmd.off =
 500             il_blink_compensation(il, off,
 501                                   il->cfg->led_compensation);
 502
 503         ret = il->ops->send_led_cmd(il, &led_cmd);
 504         if (!ret) {
 505                 il->blink_on = on;
 506                 il->blink_off = off;
 507         }
 508         return ret;
 509 }
 510
 511 static void
 512 il_led_brightness_set(struct led_classdev *led_cdev,
 513                       enum led_brightness brightness)
 514 {
 515         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 516         unsigned long on = 0;
 517
 518         if (brightness > 0)
 519                 on = IL_LED_SOLID;
 520
 521         il_led_cmd(il, on, 0);
 522 }
 523
 524 static int
 525 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 526                  unsigned long *delay_off)
 527 {
 528         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 529
 530         return il_led_cmd(il, *delay_on, *delay_off);
 531 }
 532
 533 void
 534 il_leds_init(struct il_priv *il)
 535 {
 536         int mode = led_mode;
 537         int ret;
 538
 539         if (mode == IL_LED_DEFAULT)
 540                 mode = il->cfg->led_mode;
 541
 542         il->led.name =
 543             kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
 544         il->led.brightness_set = il_led_brightness_set;
 545         il->led.blink_set = il_led_blink_set;
 546         il->led.max_brightness = 1;
 547
 548         switch (mode) {
 549         case IL_LED_DEFAULT:
 550                 WARN_ON(1);
 551                 break;
 552         case IL_LED_BLINK:
 553                 il->led.default_trigger =
 554                     ieee80211_create_tpt_led_trigger(il->hw,
 555                                                      IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 556                                                      il_blink,
 557                                                      ARRAY_SIZE(il_blink));
 558                 break;
 559         case IL_LED_RF_STATE:
 560                 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
 561                 break;
 562         }
 563
 564         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 565         if (ret) {
 566                 kfree(il->led.name);
 567                 return;
 568         }
 569
 570         il->led_registered = true;
 571 }
 572 EXPORT_SYMBOL(il_leds_init);
 573
 574 void
 575 il_leds_exit(struct il_priv *il)
 576 {
 577         if (!il->led_registered)
 578                 return;
 579
 580         led_classdev_unregister(&il->led);
 581         kfree(il->led.name);
 582 }
 583 EXPORT_SYMBOL(il_leds_exit);
 584
 585 /************************** EEPROM BANDS ****************************
 586  *
 587  * The il_eeprom_band definitions below provide the mapping from the
 588  * EEPROM contents to the specific channel number supported for each
 589  * band.
 590  *
 591  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 592  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 593  * The specific geography and calibration information for that channel
 594  * is contained in the eeprom map itself.
 595  *
 596  * During init, we copy the eeprom information and channel map
 597  * information into il->channel_info_24/52 and il->channel_map_24/52
 598  *
 599  * channel_map_24/52 provides the idx in the channel_info array for a
 600  * given channel.  We have to have two separate maps as there is channel
 601  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 602  * band_2
 603  *
 604  * A value of 0xff stored in the channel_map indicates that the channel
 605  * is not supported by the hardware at all.
 606  *
 607  * A value of 0xfe in the channel_map indicates that the channel is not
 608  * valid for Tx with the current hardware.  This means that
 609  * while the system can tune and receive on a given channel, it may not
 610  * be able to associate or transmit any frames on that
 611  * channel.  There is no corresponding channel information for that
 612  * entry.
 613  *
 614  *********************************************************************/
 615
 616 /* 2.4 GHz */
 617 const u8 il_eeprom_band_1[14] = {
 618         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 619 };
 620
 621 /* 5.2 GHz bands */
 622 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 623         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 624 };
 625
 626 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 627         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 628 };
 629
 630 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 631         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 632 };
 633
 634 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 635         145, 149, 153, 157, 161, 165
 636 };
 637
 638 static const u8 il_eeprom_band_6[] = {  /* 2.4 ht40 channel */
 639         1, 2, 3, 4, 5, 6, 7
 640 };
 641
 642 static const u8 il_eeprom_band_7[] = {  /* 5.2 ht40 channel */
 643         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 644 };
 645
 646 /******************************************************************************
 647  *
 648  * EEPROM related functions
 649  *
 650 ******************************************************************************/
 651
 652 static int
 653 il_eeprom_verify_signature(struct il_priv *il)
 654 {
 655         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 656         int ret = 0;
 657
 658         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 659         switch (gp) {
 660         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 661         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 662                 break;
 663         default:
 664                 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
 665                 ret = -ENOENT;
 666                 break;
 667         }
 668         return ret;
 669 }
 670
 671 const u8 *
 672 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 673 {
 674         BUG_ON(offset >= il->cfg->eeprom_size);
 675         return &il->eeprom[offset];
 676 }
 677 EXPORT_SYMBOL(il_eeprom_query_addr);
 678
 679 u16
 680 il_eeprom_query16(const struct il_priv *il, size_t offset)
 681 {
 682         if (!il->eeprom)
 683                 return 0;
 684         return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
 685 }
 686 EXPORT_SYMBOL(il_eeprom_query16);
 687
 688 /**
 689  * il_eeprom_init - read EEPROM contents
 690  *
 691  * Load the EEPROM contents from adapter into il->eeprom
 692  *
 693  * NOTE:  This routine uses the non-debug IO access functions.
 694  */
 695 int
 696 il_eeprom_init(struct il_priv *il)
 697 {
 698         __le16 *e;
 699         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 700         int sz;
 701         int ret;
 702         u16 addr;
 703
 704         /* allocate eeprom */
 705         sz = il->cfg->eeprom_size;
 706         D_EEPROM("NVM size = %d\n", sz);
 707         il->eeprom = kzalloc(sz, GFP_KERNEL);
 708         if (!il->eeprom)
 709                 return -ENOMEM;
 710
 711         e = (__le16 *) il->eeprom;
 712
 713         il->ops->apm_init(il);
 714
 715         ret = il_eeprom_verify_signature(il);
 716         if (ret < 0) {
 717                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 718                 ret = -ENOENT;
 719                 goto err;
 720         }
 721
 722         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 723         ret = il->ops->eeprom_acquire_semaphore(il);
 724         if (ret < 0) {
 725                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 726                 ret = -ENOENT;
 727                 goto err;
 728         }
 729
 730         /* eeprom is an array of 16bit values */
 731         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 732                 u32 r;
 733
 734                 _il_wr(il, CSR_EEPROM_REG,
 735                        CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 736
 737                 ret =
 738                     _il_poll_bit(il, CSR_EEPROM_REG,
 739                                  CSR_EEPROM_REG_READ_VALID_MSK,
 740                                  CSR_EEPROM_REG_READ_VALID_MSK,
 741                                  IL_EEPROM_ACCESS_TIMEOUT);
 742                 if (ret < 0) {
 743                         IL_ERR("Time out reading EEPROM[%d]\n", addr);
 744                         goto done;
 745                 }
 746                 r = _il_rd(il, CSR_EEPROM_REG);
 747                 e[addr / 2] = cpu_to_le16(r >> 16);
 748         }
 749
 750         D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 751                  il_eeprom_query16(il, EEPROM_VERSION));
 752
 753         ret = 0;
 754 done:
 755         il->ops->eeprom_release_semaphore(il);
 756
 757 err:
 758         if (ret)
 759                 il_eeprom_free(il);
 760         /* Reset chip to save power until we load uCode during "up". */
 761         il_apm_stop(il);
 762         return ret;
 763 }
 764 EXPORT_SYMBOL(il_eeprom_init);
 765
 766 void
 767 il_eeprom_free(struct il_priv *il)
 768 {
 769         kfree(il->eeprom);
 770         il->eeprom = NULL;
 771 }
 772 EXPORT_SYMBOL(il_eeprom_free);
 773
 774 static void
 775 il_init_band_reference(const struct il_priv *il, int eep_band,
 776                        int *eeprom_ch_count,
 777                        const struct il_eeprom_channel **eeprom_ch_info,
 778                        const u8 **eeprom_ch_idx)
 779 {
 780         u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 781
 782         switch (eep_band) {
 783         case 1:         /* 2.4GHz band */
 784                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 785                 *eeprom_ch_info =
 786                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 787                                                                      offset);
 788                 *eeprom_ch_idx = il_eeprom_band_1;
 789                 break;
 790         case 2:         /* 4.9GHz band */
 791                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 792                 *eeprom_ch_info =
 793                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 794                                                                      offset);
 795                 *eeprom_ch_idx = il_eeprom_band_2;
 796                 break;
 797         case 3:         /* 5.2GHz band */
 798                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 799                 *eeprom_ch_info =
 800                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 801                                                                      offset);
 802                 *eeprom_ch_idx = il_eeprom_band_3;
 803                 break;
 804         case 4:         /* 5.5GHz band */
 805                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 806                 *eeprom_ch_info =
 807                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 808                                                                      offset);
 809                 *eeprom_ch_idx = il_eeprom_band_4;
 810                 break;
 811         case 5:         /* 5.7GHz band */
 812                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 813                 *eeprom_ch_info =
 814                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 815                                                                      offset);
 816                 *eeprom_ch_idx = il_eeprom_band_5;
 817                 break;
 818         case 6:         /* 2.4GHz ht40 channels */
 819                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 820                 *eeprom_ch_info =
 821                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 822                                                                      offset);
 823                 *eeprom_ch_idx = il_eeprom_band_6;
 824                 break;
 825         case 7:         /* 5 GHz ht40 channels */
 826                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 827                 *eeprom_ch_info =
 828                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 829                                                                      offset);
 830                 *eeprom_ch_idx = il_eeprom_band_7;
 831                 break;
 832         default:
 833                 BUG();
 834         }
 835 }
 836
 837 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 838                             ? # x " " : "")
 839 /**
 840  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 841  *
 842  * Does not set up a command, or touch hardware.
 843  */
 844 static int
 845 il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
 846                       const struct il_eeprom_channel *eeprom_ch,
 847                       u8 clear_ht40_extension_channel)
 848 {
 849         struct il_channel_info *ch_info;
 850
 851         ch_info =
 852             (struct il_channel_info *)il_get_channel_info(il, band, channel);
 853
 854         if (!il_is_channel_valid(ch_info))
 855                 return -1;
 856
 857         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 858                  " Ad-Hoc %ssupported\n", ch_info->channel,
 859                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 860                  CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 861                  CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 862                  CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 863                  eeprom_ch->max_power_avg,
 864                  ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 865                   !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 866
 867         ch_info->ht40_eeprom = *eeprom_ch;
 868         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 869         ch_info->ht40_flags = eeprom_ch->flags;
 870         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 871                 ch_info->ht40_extension_channel &=
 872                     ~clear_ht40_extension_channel;
 873
 874         return 0;
 875 }
 876
 877 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 878                             ? # x " " : "")
 879
 880 /**
 881  * il_init_channel_map - Set up driver's info for all possible channels
 882  */
 883 int
 884 il_init_channel_map(struct il_priv *il)
 885 {
 886         int eeprom_ch_count = 0;
 887         const u8 *eeprom_ch_idx = NULL;
 888         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 889         int band, ch;
 890         struct il_channel_info *ch_info;
 891
 892         if (il->channel_count) {
 893                 D_EEPROM("Channel map already initialized.\n");
 894                 return 0;
 895         }
 896
 897         D_EEPROM("Initializing regulatory info from EEPROM\n");
 898
 899         il->channel_count =
 900             ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 901             ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 902             ARRAY_SIZE(il_eeprom_band_5);
 903
 904         D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 905
 906         il->channel_info =
 907             kcalloc(il->channel_count, sizeof(struct il_channel_info),
 908                     GFP_KERNEL);
 909         if (!il->channel_info) {
 910                 IL_ERR("Could not allocate channel_info\n");
 911                 il->channel_count = 0;
 912                 return -ENOMEM;
 913         }
 914
 915         ch_info = il->channel_info;
 916
 917         /* Loop through the 5 EEPROM bands adding them in order to the
 918          * channel map we maintain (that contains additional information than
 919          * what just in the EEPROM) */
 920         for (band = 1; band <= 5; band++) {
 921
 922                 il_init_band_reference(il, band, &eeprom_ch_count,
 923                                        &eeprom_ch_info, &eeprom_ch_idx);
 924
 925                 /* Loop through each band adding each of the channels */
 926                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 927                         ch_info->channel = eeprom_ch_idx[ch];
 928                         ch_info->band =
 929                             (band ==
 930                              1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 931
 932                         /* permanently store EEPROM's channel regulatory flags
 933                          *   and max power in channel info database. */
 934                         ch_info->eeprom = eeprom_ch_info[ch];
 935
 936                         /* Copy the run-time flags so they are there even on
 937                          * invalid channels */
 938                         ch_info->flags = eeprom_ch_info[ch].flags;
 939                         /* First write that ht40 is not enabled, and then enable
 940                          * one by one */
 941                         ch_info->ht40_extension_channel =
 942                             IEEE80211_CHAN_NO_HT40;
 943
 944                         if (!(il_is_channel_valid(ch_info))) {
 945                                 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 946                                          "No traffic\n", ch_info->channel,
 947                                          ch_info->flags,
 948                                          il_is_channel_a_band(ch_info) ? "5.2" :
 949                                          "2.4");
 950                                 ch_info++;
 951                                 continue;
 952                         }
 953
 954                         /* Initialize regulatory-based run-time data */
 955                         ch_info->max_power_avg = ch_info->curr_txpow =
 956                             eeprom_ch_info[ch].max_power_avg;
 957                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 958                         ch_info->min_power = 0;
 959
 960                         D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 961                                  " Ad-Hoc %ssupported\n", ch_info->channel,
 962                                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 963                                  CHECK_AND_PRINT_I(VALID),
 964                                  CHECK_AND_PRINT_I(IBSS),
 965                                  CHECK_AND_PRINT_I(ACTIVE),
 966                                  CHECK_AND_PRINT_I(RADAR),
 967                                  CHECK_AND_PRINT_I(WIDE),
 968                                  CHECK_AND_PRINT_I(DFS),
 969                                  eeprom_ch_info[ch].flags,
 970                                  eeprom_ch_info[ch].max_power_avg,
 971                                  ((eeprom_ch_info[ch].
 972                                    flags & EEPROM_CHANNEL_IBSS) &&
 973                                   !(eeprom_ch_info[ch].
 974                                     flags & EEPROM_CHANNEL_RADAR)) ? "" :
 975                                  "not ");
 976
 977                         ch_info++;
 978                 }
 979         }
 980
 981         /* Check if we do have HT40 channels */
 982         if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
 983             il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
 984                 return 0;
 985
 986         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
 987         for (band = 6; band <= 7; band++) {
 988                 enum nl80211_band ieeeband;
 989
 990                 il_init_band_reference(il, band, &eeprom_ch_count,
 991                                        &eeprom_ch_info, &eeprom_ch_idx);
 992
 993                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 994                 ieeeband =
 995                     (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 996
 997                 /* Loop through each band adding each of the channels */
 998                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 999                         /* Set up driver's info for lower half */
1000                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1001                                               &eeprom_ch_info[ch],
1002                                               IEEE80211_CHAN_NO_HT40PLUS);
1003
1004                         /* Set up driver's info for upper half */
1005                         il_mod_ht40_chan_info(il, ieeeband,
1006                                               eeprom_ch_idx[ch] + 4,
1007                                               &eeprom_ch_info[ch],
1008                                               IEEE80211_CHAN_NO_HT40MINUS);
1009                 }
1010         }
1011
1012         return 0;
1013 }
1014 EXPORT_SYMBOL(il_init_channel_map);
1015
1016 /*
1017  * il_free_channel_map - undo allocations in il_init_channel_map
1018  */
1019 void
1020 il_free_channel_map(struct il_priv *il)
1021 {
1022         kfree(il->channel_info);
1023         il->channel_count = 0;
1024 }
1025 EXPORT_SYMBOL(il_free_channel_map);
1026
1027 /**
1028  * il_get_channel_info - Find driver's ilate channel info
1029  *
1030  * Based on band and channel number.
1031  */
1032 const struct il_channel_info *
1033 il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1034                     u16 channel)
1035 {
1036         int i;
1037
1038         switch (band) {
1039         case NL80211_BAND_5GHZ:
1040                 for (i = 14; i < il->channel_count; i++) {
1041                         if (il->channel_info[i].channel == channel)
1042                                 return &il->channel_info[i];
1043                 }
1044                 break;
1045         case NL80211_BAND_2GHZ:
1046                 if (channel >= 1 && channel <= 14)
1047                         return &il->channel_info[channel - 1];
1048                 break;
1049         default:
1050                 BUG();
1051         }
1052
1053         return NULL;
1054 }
1055 EXPORT_SYMBOL(il_get_channel_info);
1056
1057 /*
1058  * Setting power level allows the card to go to sleep when not busy.
1059  *
1060  * We calculate a sleep command based on the required latency, which
1061  * we get from mac80211.
1062  */
1063
1064 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1065                 cpu_to_le32(X0), \
1066                 cpu_to_le32(X1), \
1067                 cpu_to_le32(X2), \
1068                 cpu_to_le32(X3), \
1069                 cpu_to_le32(X4)  \
1070 }
1071
1072 static void
1073 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1074 {
1075         const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1076                 SLP_VEC(2, 2, 4, 6, 0xFF),
1077                 SLP_VEC(2, 4, 7, 10, 10),
1078                 SLP_VEC(4, 7, 10, 10, 0xFF)
1079         };
1080         int i, dtim_period, no_dtim;
1081         u32 max_sleep;
1082         bool skip;
1083
1084         memset(cmd, 0, sizeof(*cmd));
1085
1086         if (il->power_data.pci_pm)
1087                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1088
1089         /* if no Power Save, we are done */
1090         if (il->power_data.ps_disabled)
1091                 return;
1092
1093         cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1094         cmd->keep_alive_seconds = 0;
1095         cmd->debug_flags = 0;
1096         cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1097         cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1098         cmd->keep_alive_beacons = 0;
1099
1100         dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1101
1102         if (dtim_period <= 2) {
1103                 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1104                 no_dtim = 2;
1105         } else if (dtim_period <= 10) {
1106                 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1107                 no_dtim = 2;
1108         } else {
1109                 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1110                 no_dtim = 0;
1111         }
1112
1113         if (dtim_period == 0) {
1114                 dtim_period = 1;
1115                 skip = false;
1116         } else {
1117                 skip = !!no_dtim;
1118         }
1119
1120         if (skip) {
1121                 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1122
1123                 max_sleep = le32_to_cpu(tmp);
1124                 if (max_sleep == 0xFF)
1125                         max_sleep = dtim_period * (skip + 1);
1126                 else if (max_sleep >  dtim_period)
1127                         max_sleep = (max_sleep / dtim_period) * dtim_period;
1128                 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1129         } else {
1130                 max_sleep = dtim_period;
1131                 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1132         }
1133
1134         for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1135                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1136                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1137 }
1138
1139 static int
1140 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1141 {
1142         D_POWER("Sending power/sleep command\n");
1143         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1144         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1145         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1146         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1147                 le32_to_cpu(cmd->sleep_interval[0]),
1148                 le32_to_cpu(cmd->sleep_interval[1]),
1149                 le32_to_cpu(cmd->sleep_interval[2]),
1150                 le32_to_cpu(cmd->sleep_interval[3]),
1151                 le32_to_cpu(cmd->sleep_interval[4]));
1152
1153         return il_send_cmd_pdu(il, C_POWER_TBL,
1154                                sizeof(struct il_powertable_cmd), cmd);
1155 }
1156
1157 static int
1158 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1159 {
1160         int ret;
1161         bool update_chains;
1162
1163         lockdep_assert_held(&il->mutex);
1164
1165         /* Don't update the RX chain when chain noise calibration is running */
1166         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1167             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1168
1169         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1170                 return 0;
1171
1172         if (!il_is_ready_rf(il))
1173                 return -EIO;
1174
1175         /* scan complete use sleep_power_next, need to be updated */
1176         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1177         if (test_bit(S_SCANNING, &il->status) && !force) {
1178                 D_INFO("Defer power set mode while scanning\n");
1179                 return 0;
1180         }
1181
1182         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1183                 set_bit(S_POWER_PMI, &il->status);
1184
1185         ret = il_set_power(il, cmd);
1186         if (!ret) {
1187                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1188                         clear_bit(S_POWER_PMI, &il->status);
1189
1190                 if (il->ops->update_chain_flags && update_chains)
1191                         il->ops->update_chain_flags(il);
1192                 else if (il->ops->update_chain_flags)
1193                         D_POWER("Cannot update the power, chain noise "
1194                                 "calibration running: %d\n",
1195                                 il->chain_noise_data.state);
1196
1197                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1198         } else
1199                 IL_ERR("set power fail, ret = %d", ret);
1200
1201         return ret;
1202 }
1203
1204 int
1205 il_power_update_mode(struct il_priv *il, bool force)
1206 {
1207         struct il_powertable_cmd cmd;
1208
1209         il_build_powertable_cmd(il, &cmd);
1210
1211         return il_power_set_mode(il, &cmd, force);
1212 }
1213 EXPORT_SYMBOL(il_power_update_mode);
1214
1215 /* initialize to default */
1216 void
1217 il_power_initialize(struct il_priv *il)
1218 {
1219         u16 lctl;
1220
1221         pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1222         il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1223
1224         il->power_data.debug_sleep_level_override = -1;
1225
1226         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1227 }
1228 EXPORT_SYMBOL(il_power_initialize);
1229
1230 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1231  * sending probe req.  This should be set long enough to hear probe responses
1232  * from more than one AP.  */
1233 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1234 #define IL_ACTIVE_DWELL_TIME_52    (20)
1235
1236 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1237 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1238
1239 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1240  * Must be set longer than active dwell time.
1241  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1242 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1243 #define IL_PASSIVE_DWELL_TIME_52   (10)
1244 #define IL_PASSIVE_DWELL_BASE      (100)
1245 #define IL_CHANNEL_TUNE_TIME       5
1246
1247 static int
1248 il_send_scan_abort(struct il_priv *il)
1249 {
1250         int ret;
1251         struct il_rx_pkt *pkt;
1252         struct il_host_cmd cmd = {
1253                 .id = C_SCAN_ABORT,
1254                 .flags = CMD_WANT_SKB,
1255         };
1256
1257         /* Exit instantly with error when device is not ready
1258          * to receive scan abort command or it does not perform
1259          * hardware scan currently */
1260         if (!test_bit(S_READY, &il->status) ||
1261             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1262             !test_bit(S_SCAN_HW, &il->status) ||
1263             test_bit(S_FW_ERROR, &il->status) ||
1264             test_bit(S_EXIT_PENDING, &il->status))
1265                 return -EIO;
1266
1267         ret = il_send_cmd_sync(il, &cmd);
1268         if (ret)
1269                 return ret;
1270
1271         pkt = (struct il_rx_pkt *)cmd.reply_page;
1272         if (pkt->u.status != CAN_ABORT_STATUS) {
1273                 /* The scan abort will return 1 for success or
1274                  * 2 for "failure".  A failure condition can be
1275                  * due to simply not being in an active scan which
1276                  * can occur if we send the scan abort before we
1277                  * the microcode has notified us that a scan is
1278                  * completed. */
1279                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1280                 ret = -EIO;
1281         }
1282
1283         il_free_pages(il, cmd.reply_page);
1284         return ret;
1285 }
1286
1287 static void
1288 il_complete_scan(struct il_priv *il, bool aborted)
1289 {
1290         struct cfg80211_scan_info info = {
1291                 .aborted = aborted,
1292         };
1293
1294         /* check if scan was requested from mac80211 */
1295         if (il->scan_request) {
1296                 D_SCAN("Complete scan in mac80211\n");
1297                 ieee80211_scan_completed(il->hw, &info);
1298         }
1299
1300         il->scan_vif = NULL;
1301         il->scan_request = NULL;
1302 }
1303
1304 void
1305 il_force_scan_end(struct il_priv *il)
1306 {
1307         lockdep_assert_held(&il->mutex);
1308
1309         if (!test_bit(S_SCANNING, &il->status)) {
1310                 D_SCAN("Forcing scan end while not scanning\n");
1311                 return;
1312         }
1313
1314         D_SCAN("Forcing scan end\n");
1315         clear_bit(S_SCANNING, &il->status);
1316         clear_bit(S_SCAN_HW, &il->status);
1317         clear_bit(S_SCAN_ABORTING, &il->status);
1318         il_complete_scan(il, true);
1319 }
1320
1321 static void
1322 il_do_scan_abort(struct il_priv *il)
1323 {
1324         int ret;
1325
1326         lockdep_assert_held(&il->mutex);
1327
1328         if (!test_bit(S_SCANNING, &il->status)) {
1329                 D_SCAN("Not performing scan to abort\n");
1330                 return;
1331         }
1332
1333         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1334                 D_SCAN("Scan abort in progress\n");
1335                 return;
1336         }
1337
1338         ret = il_send_scan_abort(il);
1339         if (ret) {
1340                 D_SCAN("Send scan abort failed %d\n", ret);
1341                 il_force_scan_end(il);
1342         } else
1343                 D_SCAN("Successfully send scan abort\n");
1344 }
1345
1346 /**
1347  * il_scan_cancel - Cancel any currently executing HW scan
1348  */
1349 int
1350 il_scan_cancel(struct il_priv *il)
1351 {
1352         D_SCAN("Queuing abort scan\n");
1353         queue_work(il->workqueue, &il->abort_scan);
1354         return 0;
1355 }
1356 EXPORT_SYMBOL(il_scan_cancel);
1357
1358 /**
1359  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1360  * @ms: amount of time to wait (in milliseconds) for scan to abort
1361  *
1362  */
1363 int
1364 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1365 {
1366         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1367
1368         lockdep_assert_held(&il->mutex);
1369
1370         D_SCAN("Scan cancel timeout\n");
1371
1372         il_do_scan_abort(il);
1373
1374         while (time_before_eq(jiffies, timeout)) {
1375                 if (!test_bit(S_SCAN_HW, &il->status))
1376                         break;
1377                 msleep(20);
1378         }
1379
1380         return test_bit(S_SCAN_HW, &il->status);
1381 }
1382 EXPORT_SYMBOL(il_scan_cancel_timeout);
1383
1384 /* Service response to C_SCAN (0x80) */
1385 static void
1386 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1387 {
1388 #ifdef CONFIG_IWLEGACY_DEBUG
1389         struct il_rx_pkt *pkt = rxb_addr(rxb);
1390         struct il_scanreq_notification *notif =
1391             (struct il_scanreq_notification *)pkt->u.raw;
1392
1393         D_SCAN("Scan request status = 0x%x\n", notif->status);
1394 #endif
1395 }
1396
1397 /* Service N_SCAN_START (0x82) */
1398 static void
1399 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1400 {
1401         struct il_rx_pkt *pkt = rxb_addr(rxb);
1402         struct il_scanstart_notification *notif =
1403             (struct il_scanstart_notification *)pkt->u.raw;
1404         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1405         D_SCAN("Scan start: " "%d [802.11%s] "
1406                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1407                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1408                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1409 }
1410
1411 /* Service N_SCAN_RESULTS (0x83) */
1412 static void
1413 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1414 {
1415 #ifdef CONFIG_IWLEGACY_DEBUG
1416         struct il_rx_pkt *pkt = rxb_addr(rxb);
1417         struct il_scanresults_notification *notif =
1418             (struct il_scanresults_notification *)pkt->u.raw;
1419
1420         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1421                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1422                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1423                le32_to_cpu(notif->stats[0]),
1424                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1425 #endif
1426 }
1427
1428 /* Service N_SCAN_COMPLETE (0x84) */
1429 static void
1430 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1431 {
1432
1433 #ifdef CONFIG_IWLEGACY_DEBUG
1434         struct il_rx_pkt *pkt = rxb_addr(rxb);
1435         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1436 #endif
1437
1438         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1439                scan_notif->scanned_channels, scan_notif->tsf_low,
1440                scan_notif->tsf_high, scan_notif->status);
1441
1442         /* The HW is no longer scanning */
1443         clear_bit(S_SCAN_HW, &il->status);
1444
1445         D_SCAN("Scan on %sGHz took %dms\n",
1446                (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1447                jiffies_to_msecs(jiffies - il->scan_start));
1448
1449         queue_work(il->workqueue, &il->scan_completed);
1450 }
1451
1452 void
1453 il_setup_rx_scan_handlers(struct il_priv *il)
1454 {
1455         /* scan handlers */
1456         il->handlers[C_SCAN] = il_hdl_scan;
1457         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1458         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1459         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1460 }
1461 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1462
1463 u16
1464 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1465                          u8 n_probes)
1466 {
1467         if (band == NL80211_BAND_5GHZ)
1468                 return IL_ACTIVE_DWELL_TIME_52 +
1469                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1470         else
1471                 return IL_ACTIVE_DWELL_TIME_24 +
1472                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1473 }
1474 EXPORT_SYMBOL(il_get_active_dwell_time);
1475
1476 u16
1477 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1478                           struct ieee80211_vif *vif)
1479 {
1480         u16 value;
1481
1482         u16 passive =
1483             (band ==
1484              NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1485             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1486             IL_PASSIVE_DWELL_TIME_52;
1487
1488         if (il_is_any_associated(il)) {
1489                 /*
1490                  * If we're associated, we clamp the maximum passive
1491                  * dwell time to be 98% of the smallest beacon interval
1492                  * (minus 2 * channel tune time)
1493                  */
1494                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1495                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1496                         value = IL_PASSIVE_DWELL_BASE;
1497                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1498                 passive = min(value, passive);
1499         }
1500
1501         return passive;
1502 }
1503 EXPORT_SYMBOL(il_get_passive_dwell_time);
1504
1505 void
1506 il_init_scan_params(struct il_priv *il)
1507 {
1508         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1509         if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1510                 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1511         if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1512                 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1513 }
1514 EXPORT_SYMBOL(il_init_scan_params);
1515
1516 static int
1517 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1518 {
1519         int ret;
1520
1521         lockdep_assert_held(&il->mutex);
1522
1523         cancel_delayed_work(&il->scan_check);
1524
1525         if (!il_is_ready_rf(il)) {
1526                 IL_WARN("Request scan called when driver not ready.\n");
1527                 return -EIO;
1528         }
1529
1530         if (test_bit(S_SCAN_HW, &il->status)) {
1531                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1532                 return -EBUSY;
1533         }
1534
1535         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1536                 D_SCAN("Scan request while abort pending.\n");
1537                 return -EBUSY;
1538         }
1539
1540         D_SCAN("Starting scan...\n");
1541
1542         set_bit(S_SCANNING, &il->status);
1543         il->scan_start = jiffies;
1544
1545         ret = il->ops->request_scan(il, vif);
1546         if (ret) {
1547                 clear_bit(S_SCANNING, &il->status);
1548                 return ret;
1549         }
1550
1551         queue_delayed_work(il->workqueue, &il->scan_check,
1552                            IL_SCAN_CHECK_WATCHDOG);
1553
1554         return 0;
1555 }
1556
1557 int
1558 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1559                struct ieee80211_scan_request *hw_req)
1560 {
1561         struct cfg80211_scan_request *req = &hw_req->req;
1562         struct il_priv *il = hw->priv;
1563         int ret;
1564
1565         if (req->n_channels == 0) {
1566                 IL_ERR("Can not scan on no channels.\n");
1567                 return -EINVAL;
1568         }
1569
1570         mutex_lock(&il->mutex);
1571         D_MAC80211("enter\n");
1572
1573         if (test_bit(S_SCANNING, &il->status)) {
1574                 D_SCAN("Scan already in progress.\n");
1575                 ret = -EAGAIN;
1576                 goto out_unlock;
1577         }
1578
1579         /* mac80211 will only ask for one band at a time */
1580         il->scan_request = req;
1581         il->scan_vif = vif;
1582         il->scan_band = req->channels[0]->band;
1583
1584         ret = il_scan_initiate(il, vif);
1585
1586 out_unlock:
1587         D_MAC80211("leave ret %d\n", ret);
1588         mutex_unlock(&il->mutex);
1589
1590         return ret;
1591 }
1592 EXPORT_SYMBOL(il_mac_hw_scan);
1593
1594 static void
1595 il_bg_scan_check(struct work_struct *data)
1596 {
1597         struct il_priv *il =
1598             container_of(data, struct il_priv, scan_check.work);
1599
1600         D_SCAN("Scan check work\n");
1601
1602         /* Since we are here firmware does not finish scan and
1603          * most likely is in bad shape, so we don't bother to
1604          * send abort command, just force scan complete to mac80211 */
1605         mutex_lock(&il->mutex);
1606         il_force_scan_end(il);
1607         mutex_unlock(&il->mutex);
1608 }
1609
1610 /**
1611  * il_fill_probe_req - fill in all required fields and IE for probe request
1612  */
1613
1614 u16
1615 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1616                   const u8 *ta, const u8 *ies, int ie_len, int left)
1617 {
1618         int len = 0;
1619         u8 *pos = NULL;
1620
1621         /* Make sure there is enough space for the probe request,
1622          * two mandatory IEs and the data */
1623         left -= 24;
1624         if (left < 0)
1625                 return 0;
1626
1627         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1628         eth_broadcast_addr(frame->da);
1629         memcpy(frame->sa, ta, ETH_ALEN);
1630         eth_broadcast_addr(frame->bssid);
1631         frame->seq_ctrl = 0;
1632
1633         len += 24;
1634
1635         /* ...next IE... */
1636         pos = &frame->u.probe_req.variable[0];
1637
1638         /* fill in our indirect SSID IE */
1639         left -= 2;
1640         if (left < 0)
1641                 return 0;
1642         *pos++ = WLAN_EID_SSID;
1643         *pos++ = 0;
1644
1645         len += 2;
1646
1647         if (WARN_ON(left < ie_len))
1648                 return len;
1649
1650         if (ies && ie_len) {
1651                 memcpy(pos, ies, ie_len);
1652                 len += ie_len;
1653         }
1654
1655         return (u16) len;
1656 }
1657 EXPORT_SYMBOL(il_fill_probe_req);
1658
1659 static void
1660 il_bg_abort_scan(struct work_struct *work)
1661 {
1662         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1663
1664         D_SCAN("Abort scan work\n");
1665
1666         /* We keep scan_check work queued in case when firmware will not
1667          * report back scan completed notification */
1668         mutex_lock(&il->mutex);
1669         il_scan_cancel_timeout(il, 200);
1670         mutex_unlock(&il->mutex);
1671 }
1672
1673 static void
1674 il_bg_scan_completed(struct work_struct *work)
1675 {
1676         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1677         bool aborted;
1678
1679         D_SCAN("Completed scan.\n");
1680
1681         cancel_delayed_work(&il->scan_check);
1682
1683         mutex_lock(&il->mutex);
1684
1685         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1686         if (aborted)
1687                 D_SCAN("Aborted scan completed.\n");
1688
1689         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1690                 D_SCAN("Scan already completed.\n");
1691                 goto out_settings;
1692         }
1693
1694         il_complete_scan(il, aborted);
1695
1696 out_settings:
1697         /* Can we still talk to firmware ? */
1698         if (!il_is_ready_rf(il))
1699                 goto out;
1700
1701         /*
1702          * We do not commit power settings while scan is pending,
1703          * do it now if the settings changed.
1704          */
1705         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1706         il_set_tx_power(il, il->tx_power_next, false);
1707
1708         il->ops->post_scan(il);
1709
1710 out:
1711         mutex_unlock(&il->mutex);
1712 }
1713
1714 void
1715 il_setup_scan_deferred_work(struct il_priv *il)
1716 {
1717         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1718         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1719         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1720 }
1721 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1722
1723 void
1724 il_cancel_scan_deferred_work(struct il_priv *il)
1725 {
1726         cancel_work_sync(&il->abort_scan);
1727         cancel_work_sync(&il->scan_completed);
1728
1729         if (cancel_delayed_work_sync(&il->scan_check)) {
1730                 mutex_lock(&il->mutex);
1731                 il_force_scan_end(il);
1732                 mutex_unlock(&il->mutex);
1733         }
1734 }
1735 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1736
1737 /* il->sta_lock must be held */
1738 static void
1739 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1740 {
1741
1742         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1743                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1744                        sta_id, il->stations[sta_id].sta.sta.addr);
1745
1746         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1747                 D_ASSOC("STA id %u addr %pM already present"
1748                         " in uCode (according to driver)\n", sta_id,
1749                         il->stations[sta_id].sta.sta.addr);
1750         } else {
1751                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1752                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1753                         il->stations[sta_id].sta.sta.addr);
1754         }
1755 }
1756
1757 static int
1758 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1759                         struct il_rx_pkt *pkt, bool sync)
1760 {
1761         u8 sta_id = addsta->sta.sta_id;
1762         unsigned long flags;
1763         int ret = -EIO;
1764
1765         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1766                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1767                 return ret;
1768         }
1769
1770         D_INFO("Processing response for adding station %u\n", sta_id);
1771
1772         spin_lock_irqsave(&il->sta_lock, flags);
1773
1774         switch (pkt->u.add_sta.status) {
1775         case ADD_STA_SUCCESS_MSK:
1776                 D_INFO("C_ADD_STA PASSED\n");
1777                 il_sta_ucode_activate(il, sta_id);
1778                 ret = 0;
1779                 break;
1780         case ADD_STA_NO_ROOM_IN_TBL:
1781                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1782                 break;
1783         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1784                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1785                        sta_id);
1786                 break;
1787         case ADD_STA_MODIFY_NON_EXIST_STA:
1788                 IL_ERR("Attempting to modify non-existing station %d\n",
1789                        sta_id);
1790                 break;
1791         default:
1792                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1793                 break;
1794         }
1795
1796         D_INFO("%s station id %u addr %pM\n",
1797                il->stations[sta_id].sta.mode ==
1798                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1799                il->stations[sta_id].sta.sta.addr);
1800
1801         /*
1802          * XXX: The MAC address in the command buffer is often changed from
1803          * the original sent to the device. That is, the MAC address
1804          * written to the command buffer often is not the same MAC address
1805          * read from the command buffer when the command returns. This
1806          * issue has not yet been resolved and this debugging is left to
1807          * observe the problem.
1808          */
1809         D_INFO("%s station according to cmd buffer %pM\n",
1810                il->stations[sta_id].sta.mode ==
1811                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1812         spin_unlock_irqrestore(&il->sta_lock, flags);
1813
1814         return ret;
1815 }
1816
1817 static void
1818 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1819                     struct il_rx_pkt *pkt)
1820 {
1821         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1822
1823         il_process_add_sta_resp(il, addsta, pkt, false);
1824
1825 }
1826
1827 int
1828 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1829 {
1830         struct il_rx_pkt *pkt = NULL;
1831         int ret = 0;
1832         u8 data[sizeof(*sta)];
1833         struct il_host_cmd cmd = {
1834                 .id = C_ADD_STA,
1835                 .flags = flags,
1836                 .data = data,
1837         };
1838         u8 sta_id __maybe_unused = sta->sta.sta_id;
1839
1840         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1841                flags & CMD_ASYNC ? "a" : "");
1842
1843         if (flags & CMD_ASYNC)
1844                 cmd.callback = il_add_sta_callback;
1845         else {
1846                 cmd.flags |= CMD_WANT_SKB;
1847                 might_sleep();
1848         }
1849
1850         cmd.len = il->ops->build_addsta_hcmd(sta, data);
1851         ret = il_send_cmd(il, &cmd);
1852         if (ret)
1853                 return ret;
1854         if (flags & CMD_ASYNC)
1855                 return 0;
1856
1857         pkt = (struct il_rx_pkt *)cmd.reply_page;
1858         ret = il_process_add_sta_resp(il, sta, pkt, true);
1859
1860         il_free_pages(il, cmd.reply_page);
1861
1862         return ret;
1863 }
1864 EXPORT_SYMBOL(il_send_add_sta);
1865
1866 static void
1867 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1868 {
1869         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1870         __le32 sta_flags;
1871
1872         if (!sta || !sta_ht_inf->ht_supported)
1873                 goto done;
1874
1875         D_ASSOC("spatial multiplexing power save mode: %s\n",
1876                 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1877                 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1878                 "disabled");
1879
1880         sta_flags = il->stations[idx].sta.station_flags;
1881
1882         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1883
1884         switch (sta->smps_mode) {
1885         case IEEE80211_SMPS_STATIC:
1886                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1887                 break;
1888         case IEEE80211_SMPS_DYNAMIC:
1889                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1890                 break;
1891         case IEEE80211_SMPS_OFF:
1892                 break;
1893         default:
1894                 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1895                 break;
1896         }
1897
1898         sta_flags |=
1899             cpu_to_le32((u32) sta_ht_inf->
1900                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1901
1902         sta_flags |=
1903             cpu_to_le32((u32) sta_ht_inf->
1904                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1905
1906         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1907                 sta_flags |= STA_FLG_HT40_EN_MSK;
1908         else
1909                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1910
1911         il->stations[idx].sta.station_flags = sta_flags;
1912 done:
1913         return;
1914 }
1915
1916 /**
1917  * il_prep_station - Prepare station information for addition
1918  *
1919  * should be called with sta_lock held
1920  */
1921 u8
1922 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1923                 struct ieee80211_sta *sta)
1924 {
1925         struct il_station_entry *station;
1926         int i;
1927         u8 sta_id = IL_INVALID_STATION;
1928         u16 rate;
1929
1930         if (is_ap)
1931                 sta_id = IL_AP_ID;
1932         else if (is_broadcast_ether_addr(addr))
1933                 sta_id = il->hw_params.bcast_id;
1934         else
1935                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1936                         if (ether_addr_equal(il->stations[i].sta.sta.addr,
1937                                              addr)) {
1938                                 sta_id = i;
1939                                 break;
1940                         }
1941
1942                         if (!il->stations[i].used &&
1943                             sta_id == IL_INVALID_STATION)
1944                                 sta_id = i;
1945                 }
1946
1947         /*
1948          * These two conditions have the same outcome, but keep them
1949          * separate
1950          */
1951         if (unlikely(sta_id == IL_INVALID_STATION))
1952                 return sta_id;
1953
1954         /*
1955          * uCode is not able to deal with multiple requests to add a
1956          * station. Keep track if one is in progress so that we do not send
1957          * another.
1958          */
1959         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1960                 D_INFO("STA %d already in process of being added.\n", sta_id);
1961                 return sta_id;
1962         }
1963
1964         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1965             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1966             ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1967                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1968                         sta_id, addr);
1969                 return sta_id;
1970         }
1971
1972         station = &il->stations[sta_id];
1973         station->used = IL_STA_DRIVER_ACTIVE;
1974         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1975         il->num_stations++;
1976
1977         /* Set up the C_ADD_STA command to send to device */
1978         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1979         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1980         station->sta.mode = 0;
1981         station->sta.sta.sta_id = sta_id;
1982         station->sta.station_flags = 0;
1983
1984         /*
1985          * OK to call unconditionally, since local stations (IBSS BSSID
1986          * STA and broadcast STA) pass in a NULL sta, and mac80211
1987          * doesn't allow HT IBSS.
1988          */
1989         il_set_ht_add_station(il, sta_id, sta);
1990
1991         /* 3945 only */
1992         rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1993         /* Turn on both antennas for the station... */
1994         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1995
1996         return sta_id;
1997
1998 }
1999 EXPORT_SYMBOL_GPL(il_prep_station);
2000
2001 #define STA_WAIT_TIMEOUT (HZ/2)
2002
2003 /**
2004  * il_add_station_common -
2005  */
2006 int
2007 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2008                       struct ieee80211_sta *sta, u8 *sta_id_r)
2009 {
2010         unsigned long flags_spin;
2011         int ret = 0;
2012         u8 sta_id;
2013         struct il_addsta_cmd sta_cmd;
2014
2015         *sta_id_r = 0;
2016         spin_lock_irqsave(&il->sta_lock, flags_spin);
2017         sta_id = il_prep_station(il, addr, is_ap, sta);
2018         if (sta_id == IL_INVALID_STATION) {
2019                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2020                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2021                 return -EINVAL;
2022         }
2023
2024         /*
2025          * uCode is not able to deal with multiple requests to add a
2026          * station. Keep track if one is in progress so that we do not send
2027          * another.
2028          */
2029         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2030                 D_INFO("STA %d already in process of being added.\n", sta_id);
2031                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2032                 return -EEXIST;
2033         }
2034
2035         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2036             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2037                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2038                         sta_id, addr);
2039                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2040                 return -EEXIST;
2041         }
2042
2043         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2044         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2045                sizeof(struct il_addsta_cmd));
2046         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2047
2048         /* Add station to device's station table */
2049         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2050         if (ret) {
2051                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2052                 IL_ERR("Adding station %pM failed.\n",
2053                        il->stations[sta_id].sta.sta.addr);
2054                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2055                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2056                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2057         }
2058         *sta_id_r = sta_id;
2059         return ret;
2060 }
2061 EXPORT_SYMBOL(il_add_station_common);
2062
2063 /**
2064  * il_sta_ucode_deactivate - deactivate ucode status for a station
2065  *
2066  * il->sta_lock must be held
2067  */
2068 static void
2069 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2070 {
2071         /* Ucode must be active and driver must be non active */
2072         if ((il->stations[sta_id].
2073              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2074             IL_STA_UCODE_ACTIVE)
2075                 IL_ERR("removed non active STA %u\n", sta_id);
2076
2077         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2078
2079         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2080         D_ASSOC("Removed STA %u\n", sta_id);
2081 }
2082
2083 static int
2084 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2085                        bool temporary)
2086 {
2087         struct il_rx_pkt *pkt;
2088         int ret;
2089
2090         unsigned long flags_spin;
2091         struct il_rem_sta_cmd rm_sta_cmd;
2092
2093         struct il_host_cmd cmd = {
2094                 .id = C_REM_STA,
2095                 .len = sizeof(struct il_rem_sta_cmd),
2096                 .flags = CMD_SYNC,
2097                 .data = &rm_sta_cmd,
2098         };
2099
2100         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2101         rm_sta_cmd.num_sta = 1;
2102         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2103
2104         cmd.flags |= CMD_WANT_SKB;
2105
2106         ret = il_send_cmd(il, &cmd);
2107
2108         if (ret)
2109                 return ret;
2110
2111         pkt = (struct il_rx_pkt *)cmd.reply_page;
2112         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2113                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2114                 ret = -EIO;
2115         }
2116
2117         if (!ret) {
2118                 switch (pkt->u.rem_sta.status) {
2119                 case REM_STA_SUCCESS_MSK:
2120                         if (!temporary) {
2121                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2122                                 il_sta_ucode_deactivate(il, sta_id);
2123                                 spin_unlock_irqrestore(&il->sta_lock,
2124                                                        flags_spin);
2125                         }
2126                         D_ASSOC("C_REM_STA PASSED\n");
2127                         break;
2128                 default:
2129                         ret = -EIO;
2130                         IL_ERR("C_REM_STA failed\n");
2131                         break;
2132                 }
2133         }
2134         il_free_pages(il, cmd.reply_page);
2135
2136         return ret;
2137 }
2138
2139 /**
2140  * il_remove_station - Remove driver's knowledge of station.
2141  */
2142 int
2143 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2144 {
2145         unsigned long flags;
2146
2147         if (!il_is_ready(il)) {
2148                 D_INFO("Unable to remove station %pM, device not ready.\n",
2149                        addr);
2150                 /*
2151                  * It is typical for stations to be removed when we are
2152                  * going down. Return success since device will be down
2153                  * soon anyway
2154                  */
2155                 return 0;
2156         }
2157
2158         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2159
2160         if (WARN_ON(sta_id == IL_INVALID_STATION))
2161                 return -EINVAL;
2162
2163         spin_lock_irqsave(&il->sta_lock, flags);
2164
2165         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2166                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2167                 goto out_err;
2168         }
2169
2170         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2171                 D_INFO("Removing %pM but non UCODE active\n", addr);
2172                 goto out_err;
2173         }
2174
2175         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2176                 kfree(il->stations[sta_id].lq);
2177                 il->stations[sta_id].lq = NULL;
2178         }
2179
2180         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2181
2182         il->num_stations--;
2183
2184         BUG_ON(il->num_stations < 0);
2185
2186         spin_unlock_irqrestore(&il->sta_lock, flags);
2187
2188         return il_send_remove_station(il, addr, sta_id, false);
2189 out_err:
2190         spin_unlock_irqrestore(&il->sta_lock, flags);
2191         return -EINVAL;
2192 }
2193 EXPORT_SYMBOL_GPL(il_remove_station);
2194
2195 /**
2196  * il_clear_ucode_stations - clear ucode station table bits
2197  *
2198  * This function clears all the bits in the driver indicating
2199  * which stations are active in the ucode. Call when something
2200  * other than explicit station management would cause this in
2201  * the ucode, e.g. unassociated RXON.
2202  */
2203 void
2204 il_clear_ucode_stations(struct il_priv *il)
2205 {
2206         int i;
2207         unsigned long flags_spin;
2208         bool cleared = false;
2209
2210         D_INFO("Clearing ucode stations in driver\n");
2211
2212         spin_lock_irqsave(&il->sta_lock, flags_spin);
2213         for (i = 0; i < il->hw_params.max_stations; i++) {
2214                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2215                         D_INFO("Clearing ucode active for station %d\n", i);
2216                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2217                         cleared = true;
2218                 }
2219         }
2220         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2221
2222         if (!cleared)
2223                 D_INFO("No active stations found to be cleared\n");
2224 }
2225 EXPORT_SYMBOL(il_clear_ucode_stations);
2226
2227 /**
2228  * il_restore_stations() - Restore driver known stations to device
2229  *
2230  * All stations considered active by driver, but not present in ucode, is
2231  * restored.
2232  *
2233  * Function sleeps.
2234  */
2235 void
2236 il_restore_stations(struct il_priv *il)
2237 {
2238         struct il_addsta_cmd sta_cmd;
2239         struct il_link_quality_cmd lq;
2240         unsigned long flags_spin;
2241         int i;
2242         bool found = false;
2243         int ret;
2244         bool send_lq;
2245
2246         if (!il_is_ready(il)) {
2247                 D_INFO("Not ready yet, not restoring any stations.\n");
2248                 return;
2249         }
2250
2251         D_ASSOC("Restoring all known stations ... start.\n");
2252         spin_lock_irqsave(&il->sta_lock, flags_spin);
2253         for (i = 0; i < il->hw_params.max_stations; i++) {
2254                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2255                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2256                         D_ASSOC("Restoring sta %pM\n",
2257                                 il->stations[i].sta.sta.addr);
2258                         il->stations[i].sta.mode = 0;
2259                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2260                         found = true;
2261                 }
2262         }
2263
2264         for (i = 0; i < il->hw_params.max_stations; i++) {
2265                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2266                         memcpy(&sta_cmd, &il->stations[i].sta,
2267                                sizeof(struct il_addsta_cmd));
2268                         send_lq = false;
2269                         if (il->stations[i].lq) {
2270                                 memcpy(&lq, il->stations[i].lq,
2271                                        sizeof(struct il_link_quality_cmd));
2272                                 send_lq = true;
2273                         }
2274                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2275                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2276                         if (ret) {
2277                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2278                                 IL_ERR("Adding station %pM failed.\n",
2279                                        il->stations[i].sta.sta.addr);
2280                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2281                                 il->stations[i].used &=
2282                                     ~IL_STA_UCODE_INPROGRESS;
2283                                 spin_unlock_irqrestore(&il->sta_lock,
2284                                                        flags_spin);
2285                         }
2286                         /*
2287                          * Rate scaling has already been initialized, send
2288                          * current LQ command
2289                          */
2290                         if (send_lq)
2291                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2292                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2293                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2294                 }
2295         }
2296
2297         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2298         if (!found)
2299                 D_INFO("Restoring all known stations"
2300                        " .... no stations to be restored.\n");
2301         else
2302                 D_INFO("Restoring all known stations" " .... complete.\n");
2303 }
2304 EXPORT_SYMBOL(il_restore_stations);
2305
2306 int
2307 il_get_free_ucode_key_idx(struct il_priv *il)
2308 {
2309         int i;
2310
2311         for (i = 0; i < il->sta_key_max_num; i++)
2312                 if (!test_and_set_bit(i, &il->ucode_key_table))
2313                         return i;
2314
2315         return WEP_INVALID_OFFSET;
2316 }
2317 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2318
2319 void
2320 il_dealloc_bcast_stations(struct il_priv *il)
2321 {
2322         unsigned long flags;
2323         int i;
2324
2325         spin_lock_irqsave(&il->sta_lock, flags);
2326         for (i = 0; i < il->hw_params.max_stations; i++) {
2327                 if (!(il->stations[i].used & IL_STA_BCAST))
2328                         continue;
2329
2330                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2331                 il->num_stations--;
2332                 BUG_ON(il->num_stations < 0);
2333                 kfree(il->stations[i].lq);
2334                 il->stations[i].lq = NULL;
2335         }
2336         spin_unlock_irqrestore(&il->sta_lock, flags);
2337 }
2338 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2339
2340 #ifdef CONFIG_IWLEGACY_DEBUG
2341 static void
2342 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2343 {
2344         int i;
2345         D_RATE("lq station id 0x%x\n", lq->sta_id);
2346         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2347                lq->general_params.dual_stream_ant_msk);
2348
2349         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2350                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2351 }
2352 #else
2353 static inline void
2354 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2355 {
2356 }
2357 #endif
2358
2359 /**
2360  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2361  *
2362  * It sometimes happens when a HT rate has been in use and we
2363  * loose connectivity with AP then mac80211 will first tell us that the
2364  * current channel is not HT anymore before removing the station. In such a
2365  * scenario the RXON flags will be updated to indicate we are not
2366  * communicating HT anymore, but the LQ command may still contain HT rates.
2367  * Test for this to prevent driver from sending LQ command between the time
2368  * RXON flags are updated and when LQ command is updated.
2369  */
2370 static bool
2371 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2372 {
2373         int i;
2374
2375         if (il->ht.enabled)
2376                 return true;
2377
2378         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2379         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2380                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2381                         D_INFO("idx %d of LQ expects HT channel\n", i);
2382                         return false;
2383                 }
2384         }
2385         return true;
2386 }
2387
2388 /**
2389  * il_send_lq_cmd() - Send link quality command
2390  * @init: This command is sent as part of station initialization right
2391  *        after station has been added.
2392  *
2393  * The link quality command is sent as the last step of station creation.
2394  * This is the special case in which init is set and we call a callback in
2395  * this case to clear the state indicating that station creation is in
2396  * progress.
2397  */
2398 int
2399 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2400                u8 flags, bool init)
2401 {
2402         int ret = 0;
2403         unsigned long flags_spin;
2404
2405         struct il_host_cmd cmd = {
2406                 .id = C_TX_LINK_QUALITY_CMD,
2407                 .len = sizeof(struct il_link_quality_cmd),
2408                 .flags = flags,
2409                 .data = lq,
2410         };
2411
2412         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2413                 return -EINVAL;
2414
2415         spin_lock_irqsave(&il->sta_lock, flags_spin);
2416         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2417                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2418                 return -EINVAL;
2419         }
2420         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2421
2422         il_dump_lq_cmd(il, lq);
2423         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2424
2425         if (il_is_lq_table_valid(il, lq))
2426                 ret = il_send_cmd(il, &cmd);
2427         else
2428                 ret = -EINVAL;
2429
2430         if (cmd.flags & CMD_ASYNC)
2431                 return ret;
2432
2433         if (init) {
2434                 D_INFO("init LQ command complete,"
2435                        " clearing sta addition status for sta %d\n",
2436                        lq->sta_id);
2437                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2438                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2439                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2440         }
2441         return ret;
2442 }
2443 EXPORT_SYMBOL(il_send_lq_cmd);
2444
2445 int
2446 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2447                   struct ieee80211_sta *sta)
2448 {
2449         struct il_priv *il = hw->priv;
2450         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2451         int ret;
2452
2453         mutex_lock(&il->mutex);
2454         D_MAC80211("enter station %pM\n", sta->addr);
2455
2456         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2457         if (ret)
2458                 IL_ERR("Error removing station %pM\n", sta->addr);
2459
2460         D_MAC80211("leave ret %d\n", ret);
2461         mutex_unlock(&il->mutex);
2462
2463         return ret;
2464 }
2465 EXPORT_SYMBOL(il_mac_sta_remove);
2466
2467 /************************** RX-FUNCTIONS ****************************/
2468 /*
2469  * Rx theory of operation
2470  *
2471  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2472  * each of which point to Receive Buffers to be filled by the NIC.  These get
2473  * used not only for Rx frames, but for any command response or notification
2474  * from the NIC.  The driver and NIC manage the Rx buffers by means
2475  * of idxes into the circular buffer.
2476  *
2477  * Rx Queue Indexes
2478  * The host/firmware share two idx registers for managing the Rx buffers.
2479  *
2480  * The READ idx maps to the first position that the firmware may be writing
2481  * to -- the driver can read up to (but not including) this position and get
2482  * good data.
2483  * The READ idx is managed by the firmware once the card is enabled.
2484  *
2485  * The WRITE idx maps to the last position the driver has read from -- the
2486  * position preceding WRITE is the last slot the firmware can place a packet.
2487  *
2488  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2489  * WRITE = READ.
2490  *
2491  * During initialization, the host sets up the READ queue position to the first
2492  * IDX position, and WRITE to the last (READ - 1 wrapped)
2493  *
2494  * When the firmware places a packet in a buffer, it will advance the READ idx
2495  * and fire the RX interrupt.  The driver can then query the READ idx and
2496  * process as many packets as possible, moving the WRITE idx forward as it
2497  * resets the Rx queue buffers with new memory.
2498  *
2499  * The management in the driver is as follows:
2500  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2501  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2502  *   to replenish the iwl->rxq->rx_free.
2503  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2504  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2505  *   'processed' and 'read' driver idxes as well)
2506  * + A received packet is processed and handed to the kernel network stack,
2507  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2508  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2509  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2510  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2511  *   were enough free buffers and RX_STALLED is set it is cleared.
2512  *
2513  *
2514  * Driver sequence:
2515  *
2516  * il_rx_queue_alloc()   Allocates rx_free
2517  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2518  *                            il_rx_queue_restock
2519  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2520  *                            queue, updates firmware pointers, and updates
2521  *                            the WRITE idx.  If insufficient rx_free buffers
2522  *                            are available, schedules il_rx_replenish
2523  *
2524  * -- enable interrupts --
2525  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2526  *                            READ IDX, detaching the SKB from the pool.
2527  *                            Moves the packet buffer from queue to rx_used.
2528  *                            Calls il_rx_queue_restock to refill any empty
2529  *                            slots.
2530  * ...
2531  *
2532  */
2533
2534 /**
2535  * il_rx_queue_space - Return number of free slots available in queue.
2536  */
2537 int
2538 il_rx_queue_space(const struct il_rx_queue *q)
2539 {
2540         int s = q->read - q->write;
2541         if (s <= 0)
2542                 s += RX_QUEUE_SIZE;
2543         /* keep some buffer to not confuse full and empty queue */
2544         s -= 2;
2545         if (s < 0)
2546                 s = 0;
2547         return s;
2548 }
2549 EXPORT_SYMBOL(il_rx_queue_space);
2550
2551 /**
2552  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2553  */
2554 void
2555 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2556 {
2557         unsigned long flags;
2558         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2559         u32 reg;
2560
2561         spin_lock_irqsave(&q->lock, flags);
2562
2563         if (q->need_update == 0)
2564                 goto exit_unlock;
2565
2566         /* If power-saving is in use, make sure device is awake */
2567         if (test_bit(S_POWER_PMI, &il->status)) {
2568                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2569
2570                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2571                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2572                                reg);
2573                         il_set_bit(il, CSR_GP_CNTRL,
2574                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2575                         goto exit_unlock;
2576                 }
2577
2578                 q->write_actual = (q->write & ~0x7);
2579                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2580
2581                 /* Else device is assumed to be awake */
2582         } else {
2583                 /* Device expects a multiple of 8 */
2584                 q->write_actual = (q->write & ~0x7);
2585                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2586         }
2587
2588         q->need_update = 0;
2589
2590 exit_unlock:
2591         spin_unlock_irqrestore(&q->lock, flags);
2592 }
2593 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2594
2595 int
2596 il_rx_queue_alloc(struct il_priv *il)
2597 {
2598         struct il_rx_queue *rxq = &il->rxq;
2599         struct device *dev = &il->pci_dev->dev;
2600         int i;
2601
2602         spin_lock_init(&rxq->lock);
2603         INIT_LIST_HEAD(&rxq->rx_free);
2604         INIT_LIST_HEAD(&rxq->rx_used);
2605
2606         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2607         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2608                                      GFP_KERNEL);
2609         if (!rxq->bd)
2610                 goto err_bd;
2611
2612         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2613                                           &rxq->rb_stts_dma, GFP_KERNEL);
2614         if (!rxq->rb_stts)
2615                 goto err_rb;
2616
2617         /* Fill the rx_used queue with _all_ of the Rx buffers */
2618         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2619                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2620
2621         /* Set us so that we have processed and used all buffers, but have
2622          * not restocked the Rx queue with fresh buffers */
2623         rxq->read = rxq->write = 0;
2624         rxq->write_actual = 0;
2625         rxq->free_count = 0;
2626         rxq->need_update = 0;
2627         return 0;
2628
2629 err_rb:
2630         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2631                           rxq->bd_dma);
2632 err_bd:
2633         return -ENOMEM;
2634 }
2635 EXPORT_SYMBOL(il_rx_queue_alloc);
2636
2637 void
2638 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2639 {
2640         struct il_rx_pkt *pkt = rxb_addr(rxb);
2641         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2642
2643         if (!report->state) {
2644                 D_11H("Spectrum Measure Notification: Start\n");
2645                 return;
2646         }
2647
2648         memcpy(&il->measure_report, report, sizeof(*report));
2649         il->measurement_status |= MEASUREMENT_READY;
2650 }
2651 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2652
2653 /*
2654  * returns non-zero if packet should be dropped
2655  */
2656 int
2657 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2658                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2659 {
2660         u16 fc = le16_to_cpu(hdr->frame_control);
2661
2662         /*
2663          * All contexts have the same setting here due to it being
2664          * a module parameter, so OK to check any context.
2665          */
2666         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2667                 return 0;
2668
2669         if (!(fc & IEEE80211_FCTL_PROTECTED))
2670                 return 0;
2671
2672         D_RX("decrypt_res:0x%x\n", decrypt_res);
2673         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2674         case RX_RES_STATUS_SEC_TYPE_TKIP:
2675                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2676                  * Decryption will be done in SW. */
2677                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2678                     RX_RES_STATUS_BAD_KEY_TTAK)
2679                         break;
2680                 /* fall through */
2681
2682         case RX_RES_STATUS_SEC_TYPE_WEP:
2683                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2684                     RX_RES_STATUS_BAD_ICV_MIC) {
2685                         /* bad ICV, the packet is destroyed since the
2686                          * decryption is inplace, drop it */
2687                         D_RX("Packet destroyed\n");
2688                         return -1;
2689                 }
2690                 /* fall through */
2691         case RX_RES_STATUS_SEC_TYPE_CCMP:
2692                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2693                     RX_RES_STATUS_DECRYPT_OK) {
2694                         D_RX("hw decrypt successfully!!!\n");
2695                         stats->flag |= RX_FLAG_DECRYPTED;
2696                 }
2697                 break;
2698
2699         default:
2700                 break;
2701         }
2702         return 0;
2703 }
2704 EXPORT_SYMBOL(il_set_decrypted_flag);
2705
2706 /**
2707  * il_txq_update_write_ptr - Send new write idx to hardware
2708  */
2709 void
2710 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2711 {
2712         u32 reg = 0;
2713         int txq_id = txq->q.id;
2714
2715         if (txq->need_update == 0)
2716                 return;
2717
2718         /* if we're trying to save power */
2719         if (test_bit(S_POWER_PMI, &il->status)) {
2720                 /* wake up nic if it's powered down ...
2721                  * uCode will wake up, and interrupt us again, so next
2722                  * time we'll skip this part. */
2723                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2724
2725                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2726                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2727                                txq_id, reg);
2728                         il_set_bit(il, CSR_GP_CNTRL,
2729                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2730                         return;
2731                 }
2732
2733                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2734
2735                 /*
2736                  * else not in power-save mode,
2737                  * uCode will never sleep when we're
2738                  * trying to tx (during RFKILL, we're not trying to tx).
2739                  */
2740         } else
2741                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2742         txq->need_update = 0;
2743 }
2744 EXPORT_SYMBOL(il_txq_update_write_ptr);
2745
2746 /**
2747  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2748  */
2749 void
2750 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2751 {
2752         struct il_tx_queue *txq = &il->txq[txq_id];
2753         struct il_queue *q = &txq->q;
2754
2755         if (q->n_bd == 0)
2756                 return;
2757
2758         while (q->write_ptr != q->read_ptr) {
2759                 il->ops->txq_free_tfd(il, txq);
2760                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2761         }
2762 }
2763 EXPORT_SYMBOL(il_tx_queue_unmap);
2764
2765 /**
2766  * il_tx_queue_free - Deallocate DMA queue.
2767  * @txq: Transmit queue to deallocate.
2768  *
2769  * Empty queue by removing and destroying all BD's.
2770  * Free all buffers.
2771  * 0-fill, but do not free "txq" descriptor structure.
2772  */
2773 void
2774 il_tx_queue_free(struct il_priv *il, int txq_id)
2775 {
2776         struct il_tx_queue *txq = &il->txq[txq_id];
2777         struct device *dev = &il->pci_dev->dev;
2778         int i;
2779
2780         il_tx_queue_unmap(il, txq_id);
2781
2782         /* De-alloc array of command/tx buffers */
2783         if (txq->cmd) {
2784                 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2785                         kfree(txq->cmd[i]);
2786         }
2787
2788         /* De-alloc circular buffer of TFDs */
2789         if (txq->q.n_bd)
2790                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2791                                   txq->tfds, txq->q.dma_addr);
2792
2793         /* De-alloc array of per-TFD driver data */
2794         kfree(txq->skbs);
2795         txq->skbs = NULL;
2796
2797         /* deallocate arrays */
2798         kfree(txq->cmd);
2799         kfree(txq->meta);
2800         txq->cmd = NULL;
2801         txq->meta = NULL;
2802
2803         /* 0-fill queue descriptor structure */
2804         memset(txq, 0, sizeof(*txq));
2805 }
2806 EXPORT_SYMBOL(il_tx_queue_free);
2807
2808 /**
2809  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2810  */
2811 void
2812 il_cmd_queue_unmap(struct il_priv *il)
2813 {
2814         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2815         struct il_queue *q = &txq->q;
2816         int i;
2817
2818         if (q->n_bd == 0)
2819                 return;
2820
2821         while (q->read_ptr != q->write_ptr) {
2822                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2823
2824                 if (txq->meta[i].flags & CMD_MAPPED) {
2825                         pci_unmap_single(il->pci_dev,
2826                                          dma_unmap_addr(&txq->meta[i], mapping),
2827                                          dma_unmap_len(&txq->meta[i], len),
2828                                          PCI_DMA_BIDIRECTIONAL);
2829                         txq->meta[i].flags = 0;
2830                 }
2831
2832                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2833         }
2834
2835         i = q->n_win;
2836         if (txq->meta[i].flags & CMD_MAPPED) {
2837                 pci_unmap_single(il->pci_dev,
2838                                  dma_unmap_addr(&txq->meta[i], mapping),
2839                                  dma_unmap_len(&txq->meta[i], len),
2840                                  PCI_DMA_BIDIRECTIONAL);
2841                 txq->meta[i].flags = 0;
2842         }
2843 }
2844 EXPORT_SYMBOL(il_cmd_queue_unmap);
2845
2846 /**
2847  * il_cmd_queue_free - Deallocate DMA queue.
2848  * @txq: Transmit queue to deallocate.
2849  *
2850  * Empty queue by removing and destroying all BD's.
2851  * Free all buffers.
2852  * 0-fill, but do not free "txq" descriptor structure.
2853  */
2854 void
2855 il_cmd_queue_free(struct il_priv *il)
2856 {
2857         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2858         struct device *dev = &il->pci_dev->dev;
2859         int i;
2860
2861         il_cmd_queue_unmap(il);
2862
2863         /* De-alloc array of command/tx buffers */
2864         if (txq->cmd) {
2865                 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2866                         kfree(txq->cmd[i]);
2867         }
2868
2869         /* De-alloc circular buffer of TFDs */
2870         if (txq->q.n_bd)
2871                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2872                                   txq->tfds, txq->q.dma_addr);
2873
2874         /* deallocate arrays */
2875         kfree(txq->cmd);
2876         kfree(txq->meta);
2877         txq->cmd = NULL;
2878         txq->meta = NULL;
2879
2880         /* 0-fill queue descriptor structure */
2881         memset(txq, 0, sizeof(*txq));
2882 }
2883 EXPORT_SYMBOL(il_cmd_queue_free);
2884
2885 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2886  * DMA services
2887  *
2888  * Theory of operation
2889  *
2890  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2891  * of buffer descriptors, each of which points to one or more data buffers for
2892  * the device to read from or fill.  Driver and device exchange status of each
2893  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2894  * entries in each circular buffer, to protect against confusing empty and full
2895  * queue states.
2896  *
2897  * The device reads or writes the data in the queues via the device's several
2898  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2899  *
2900  * For Tx queue, there are low mark and high mark limits. If, after queuing
2901  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2902  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2903  * Tx queue resumed.
2904  *
2905  * See more detailed info in 4965.h.
2906  ***************************************************/
2907
2908 int
2909 il_queue_space(const struct il_queue *q)
2910 {
2911         int s = q->read_ptr - q->write_ptr;
2912
2913         if (q->read_ptr > q->write_ptr)
2914                 s -= q->n_bd;
2915
2916         if (s <= 0)
2917                 s += q->n_win;
2918         /* keep some reserve to not confuse empty and full situations */
2919         s -= 2;
2920         if (s < 0)
2921                 s = 0;
2922         return s;
2923 }
2924 EXPORT_SYMBOL(il_queue_space);
2925
2926
2927 /**
2928  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2929  */
2930 static int
2931 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2932 {
2933         /*
2934          * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2935          * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2936          */
2937         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2938         /* FIXME: remove q->n_bd */
2939         q->n_bd = TFD_QUEUE_SIZE_MAX;
2940
2941         q->n_win = slots;
2942         q->id = id;
2943
2944         /* slots_must be power-of-two size, otherwise
2945          * il_get_cmd_idx is broken. */
2946         BUG_ON(!is_power_of_2(slots));
2947
2948         q->low_mark = q->n_win / 4;
2949         if (q->low_mark < 4)
2950                 q->low_mark = 4;
2951
2952         q->high_mark = q->n_win / 8;
2953         if (q->high_mark < 2)
2954                 q->high_mark = 2;
2955
2956         q->write_ptr = q->read_ptr = 0;
2957
2958         return 0;
2959 }
2960
2961 /**
2962  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2963  */
2964 static int
2965 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2966 {
2967         struct device *dev = &il->pci_dev->dev;
2968         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2969
2970         /* Driver ilate data, only for Tx (not command) queues,
2971          * not shared with device. */
2972         if (id != il->cmd_queue) {
2973                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2974                                     sizeof(struct sk_buff *),
2975                                     GFP_KERNEL);
2976                 if (!txq->skbs) {
2977                         IL_ERR("Fail to alloc skbs\n");
2978                         goto error;
2979                 }
2980         } else
2981                 txq->skbs = NULL;
2982
2983         /* Circular buffer of transmit frame descriptors (TFDs),
2984          * shared with device */
2985         txq->tfds =
2986             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2987         if (!txq->tfds)
2988                 goto error;
2989
2990         txq->q.id = id;
2991
2992         return 0;
2993
2994 error:
2995         kfree(txq->skbs);
2996         txq->skbs = NULL;
2997
2998         return -ENOMEM;
2999 }
3000
3001 /**
3002  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3003  */
3004 int
3005 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3006 {
3007         int i, len, ret;
3008         int slots, actual_slots;
3009         struct il_tx_queue *txq = &il->txq[txq_id];
3010
3011         /*
3012          * Alloc buffer array for commands (Tx or other types of commands).
3013          * For the command queue (#4/#9), allocate command space + one big
3014          * command for scan, since scan command is very huge; the system will
3015          * not have two scans at the same time, so only one is needed.
3016          * For normal Tx queues (all other queues), no super-size command
3017          * space is needed.
3018          */
3019         if (txq_id == il->cmd_queue) {
3020                 slots = TFD_CMD_SLOTS;
3021                 actual_slots = slots + 1;
3022         } else {
3023                 slots = TFD_TX_CMD_SLOTS;
3024                 actual_slots = slots;
3025         }
3026
3027         txq->meta =
3028             kcalloc(actual_slots, sizeof(struct il_cmd_meta), GFP_KERNEL);
3029         txq->cmd =
3030             kcalloc(actual_slots, sizeof(struct il_device_cmd *), GFP_KERNEL);
3031
3032         if (!txq->meta || !txq->cmd)
3033                 goto out_free_arrays;
3034
3035         len = sizeof(struct il_device_cmd);
3036         for (i = 0; i < actual_slots; i++) {
3037                 /* only happens for cmd queue */
3038                 if (i == slots)
3039                         len = IL_MAX_CMD_SIZE;
3040
3041                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3042                 if (!txq->cmd[i])
3043                         goto err;
3044         }
3045
3046         /* Alloc driver data array and TFD circular buffer */
3047         ret = il_tx_queue_alloc(il, txq, txq_id);
3048         if (ret)
3049                 goto err;
3050
3051         txq->need_update = 0;
3052
3053         /*
3054          * For the default queues 0-3, set up the swq_id
3055          * already -- all others need to get one later
3056          * (if they need one at all).
3057          */
3058         if (txq_id < 4)
3059                 il_set_swq_id(txq, txq_id, txq_id);
3060
3061         /* Initialize queue's high/low-water marks, and head/tail idxes */
3062         il_queue_init(il, &txq->q, slots, txq_id);
3063
3064         /* Tell device where to find queue */
3065         il->ops->txq_init(il, txq);
3066
3067         return 0;
3068 err:
3069         for (i = 0; i < actual_slots; i++)
3070                 kfree(txq->cmd[i]);
3071 out_free_arrays:
3072         kfree(txq->meta);
3073         txq->meta = NULL;
3074         kfree(txq->cmd);
3075         txq->cmd = NULL;
3076
3077         return -ENOMEM;
3078 }
3079 EXPORT_SYMBOL(il_tx_queue_init);
3080
3081 void
3082 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3083 {
3084         int slots, actual_slots;
3085         struct il_tx_queue *txq = &il->txq[txq_id];
3086
3087         if (txq_id == il->cmd_queue) {
3088                 slots = TFD_CMD_SLOTS;
3089                 actual_slots = TFD_CMD_SLOTS + 1;
3090         } else {
3091                 slots = TFD_TX_CMD_SLOTS;
3092                 actual_slots = TFD_TX_CMD_SLOTS;
3093         }
3094
3095         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3096         txq->need_update = 0;
3097
3098         /* Initialize queue's high/low-water marks, and head/tail idxes */
3099         il_queue_init(il, &txq->q, slots, txq_id);
3100
3101         /* Tell device where to find queue */
3102         il->ops->txq_init(il, txq);
3103 }
3104 EXPORT_SYMBOL(il_tx_queue_reset);
3105
3106 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3107
3108 /**
3109  * il_enqueue_hcmd - enqueue a uCode command
3110  * @il: device ilate data point
3111  * @cmd: a point to the ucode command structure
3112  *
3113  * The function returns < 0 values to indicate the operation is
3114  * failed. On success, it turns the idx (> 0) of command in the
3115  * command queue.
3116  */
3117 int
3118 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3119 {
3120         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3121         struct il_queue *q = &txq->q;
3122         struct il_device_cmd *out_cmd;
3123         struct il_cmd_meta *out_meta;
3124         dma_addr_t phys_addr;
3125         unsigned long flags;
3126         int len;
3127         u32 idx;
3128         u16 fix_size;
3129
3130         cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3131         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3132
3133         /* If any of the command structures end up being larger than
3134          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3135          * we will need to increase the size of the TFD entries
3136          * Also, check to see if command buffer should not exceed the size
3137          * of device_cmd and max_cmd_size. */
3138         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3139                !(cmd->flags & CMD_SIZE_HUGE));
3140         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3141
3142         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3143                 IL_WARN("Not sending command - %s KILL\n",
3144                         il_is_rfkill(il) ? "RF" : "CT");
3145                 return -EIO;
3146         }
3147
3148         spin_lock_irqsave(&il->hcmd_lock, flags);
3149
3150         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3151                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3152
3153                 IL_ERR("Restarting adapter due to command queue full\n");
3154                 queue_work(il->workqueue, &il->restart);
3155                 return -ENOSPC;
3156         }
3157
3158         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3159         out_cmd = txq->cmd[idx];
3160         out_meta = &txq->meta[idx];
3161
3162         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3163                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3164                 return -ENOSPC;
3165         }
3166
3167         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3168         out_meta->flags = cmd->flags | CMD_MAPPED;
3169         if (cmd->flags & CMD_WANT_SKB)
3170                 out_meta->source = cmd;
3171         if (cmd->flags & CMD_ASYNC)
3172                 out_meta->callback = cmd->callback;
3173
3174         out_cmd->hdr.cmd = cmd->id;
3175         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3176
3177         /* At this point, the out_cmd now has all of the incoming cmd
3178          * information */
3179
3180         out_cmd->hdr.flags = 0;
3181         out_cmd->hdr.sequence =
3182             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3183         if (cmd->flags & CMD_SIZE_HUGE)
3184                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3185         len = sizeof(struct il_device_cmd);
3186         if (idx == TFD_CMD_SLOTS)
3187                 len = IL_MAX_CMD_SIZE;
3188
3189 #ifdef CONFIG_IWLEGACY_DEBUG
3190         switch (out_cmd->hdr.cmd) {
3191         case C_TX_LINK_QUALITY_CMD:
3192         case C_SENSITIVITY:
3193                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3194                           "%d bytes at %d[%d]:%d\n",
3195                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3196                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3197                           q->write_ptr, idx, il->cmd_queue);
3198                 break;
3199         default:
3200                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3201                      "%d bytes at %d[%d]:%d\n",
3202                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3203                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3204                      idx, il->cmd_queue);
3205         }
3206 #endif
3207
3208         phys_addr =
3209             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3210                            PCI_DMA_BIDIRECTIONAL);
3211         if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3212                 idx = -ENOMEM;
3213                 goto out;
3214         }
3215         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3216         dma_unmap_len_set(out_meta, len, fix_size);
3217
3218         txq->need_update = 1;
3219
3220         if (il->ops->txq_update_byte_cnt_tbl)
3221                 /* Set up entry in queue's byte count circular buffer */
3222                 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3223
3224         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3225                                             U32_PAD(cmd->len));
3226
3227         /* Increment and update queue's write idx */
3228         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3229         il_txq_update_write_ptr(il, txq);
3230
3231 out:
3232         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3233         return idx;
3234 }
3235
3236 /**
3237  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3238  *
3239  * When FW advances 'R' idx, all entries between old and new 'R' idx
3240  * need to be reclaimed. As result, some free space forms.  If there is
3241  * enough free space (> low mark), wake the stack that feeds us.
3242  */
3243 static void
3244 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3245 {
3246         struct il_tx_queue *txq = &il->txq[txq_id];
3247         struct il_queue *q = &txq->q;
3248         int nfreed = 0;
3249
3250         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3251                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3252                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3253                        q->write_ptr, q->read_ptr);
3254                 return;
3255         }
3256
3257         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3258              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3259
3260                 if (nfreed++ > 0) {
3261                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3262                                q->write_ptr, q->read_ptr);
3263                         queue_work(il->workqueue, &il->restart);
3264                 }
3265
3266         }
3267 }
3268
3269 /**
3270  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3271  * @rxb: Rx buffer to reclaim
3272  *
3273  * If an Rx buffer has an async callback associated with it the callback
3274  * will be executed.  The attached skb (if present) will only be freed
3275  * if the callback returns 1
3276  */
3277 void
3278 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3279 {
3280         struct il_rx_pkt *pkt = rxb_addr(rxb);
3281         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3282         int txq_id = SEQ_TO_QUEUE(sequence);
3283         int idx = SEQ_TO_IDX(sequence);
3284         int cmd_idx;
3285         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3286         struct il_device_cmd *cmd;
3287         struct il_cmd_meta *meta;
3288         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3289         unsigned long flags;
3290
3291         /* If a Tx command is being handled and it isn't in the actual
3292          * command queue then there a command routing bug has been introduced
3293          * in the queue management code. */
3294         if (WARN
3295             (txq_id != il->cmd_queue,
3296              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3297              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3298              il->txq[il->cmd_queue].q.write_ptr)) {
3299                 il_print_hex_error(il, pkt, 32);
3300                 return;
3301         }
3302
3303         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3304         cmd = txq->cmd[cmd_idx];
3305         meta = &txq->meta[cmd_idx];
3306
3307         txq->time_stamp = jiffies;
3308
3309         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3310                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3311
3312         /* Input error checking is done when commands are added to queue. */
3313         if (meta->flags & CMD_WANT_SKB) {
3314                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3315                 rxb->page = NULL;
3316         } else if (meta->callback)
3317                 meta->callback(il, cmd, pkt);
3318
3319         spin_lock_irqsave(&il->hcmd_lock, flags);
3320
3321         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3322
3323         if (!(meta->flags & CMD_ASYNC)) {
3324                 clear_bit(S_HCMD_ACTIVE, &il->status);
3325                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3326                        il_get_cmd_string(cmd->hdr.cmd));
3327                 wake_up(&il->wait_command_queue);
3328         }
3329
3330         /* Mark as unmapped */
3331         meta->flags = 0;
3332
3333         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3334 }
3335 EXPORT_SYMBOL(il_tx_cmd_complete);
3336
3337 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3338 MODULE_VERSION(IWLWIFI_VERSION);
3339 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3340 MODULE_LICENSE("GPL");
3341
3342 /*
3343  * set bt_coex_active to true, uCode will do kill/defer
3344  * every time the priority line is asserted (BT is sending signals on the
3345  * priority line in the PCIx).
3346  * set bt_coex_active to false, uCode will ignore the BT activity and
3347  * perform the normal operation
3348  *
3349  * User might experience transmit issue on some platform due to WiFi/BT
3350  * co-exist problem. The possible behaviors are:
3351  *   Able to scan and finding all the available AP
3352  *   Not able to associate with any AP
3353  * On those platforms, WiFi communication can be restored by set
3354  * "bt_coex_active" module parameter to "false"
3355  *
3356  * default: bt_coex_active = true (BT_COEX_ENABLE)
3357  */
3358 static bool bt_coex_active = true;
3359 module_param(bt_coex_active, bool, 0444);
3360 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3361
3362 u32 il_debug_level;
3363 EXPORT_SYMBOL(il_debug_level);
3364
3365 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3366 EXPORT_SYMBOL(il_bcast_addr);
3367
3368 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3369 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3370 static void
3371 il_init_ht_hw_capab(const struct il_priv *il,
3372                     struct ieee80211_sta_ht_cap *ht_info,
3373                     enum nl80211_band band)
3374 {
3375         u16 max_bit_rate = 0;
3376         u8 rx_chains_num = il->hw_params.rx_chains_num;
3377         u8 tx_chains_num = il->hw_params.tx_chains_num;
3378
3379         ht_info->cap = 0;
3380         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3381
3382         ht_info->ht_supported = true;
3383
3384         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3385         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3386         if (il->hw_params.ht40_channel & BIT(band)) {
3387                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3388                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3389                 ht_info->mcs.rx_mask[4] = 0x01;
3390                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3391         }
3392
3393         if (il->cfg->mod_params->amsdu_size_8K)
3394                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3395
3396         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3397         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3398
3399         ht_info->mcs.rx_mask[0] = 0xFF;
3400         if (rx_chains_num >= 2)
3401                 ht_info->mcs.rx_mask[1] = 0xFF;
3402         if (rx_chains_num >= 3)
3403                 ht_info->mcs.rx_mask[2] = 0xFF;
3404
3405         /* Highest supported Rx data rate */
3406         max_bit_rate *= rx_chains_num;
3407         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3408         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3409
3410         /* Tx MCS capabilities */
3411         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3412         if (tx_chains_num != rx_chains_num) {
3413                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3414                 ht_info->mcs.tx_params |=
3415                     ((tx_chains_num -
3416                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3417         }
3418 }
3419
3420 /**
3421  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3422  */
3423 int
3424 il_init_geos(struct il_priv *il)
3425 {
3426         struct il_channel_info *ch;
3427         struct ieee80211_supported_band *sband;
3428         struct ieee80211_channel *channels;
3429         struct ieee80211_channel *geo_ch;
3430         struct ieee80211_rate *rates;
3431         int i = 0;
3432         s8 max_tx_power = 0;
3433
3434         if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3435             il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3436                 D_INFO("Geography modes already initialized.\n");
3437                 set_bit(S_GEO_CONFIGURED, &il->status);
3438                 return 0;
3439         }
3440
3441         channels =
3442             kcalloc(il->channel_count, sizeof(struct ieee80211_channel),
3443                     GFP_KERNEL);
3444         if (!channels)
3445                 return -ENOMEM;
3446
3447         rates =
3448             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3449                     GFP_KERNEL);
3450         if (!rates) {
3451                 kfree(channels);
3452                 return -ENOMEM;
3453         }
3454
3455         /* 5.2GHz channels start after the 2.4GHz channels */
3456         sband = &il->bands[NL80211_BAND_5GHZ];
3457         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3458         /* just OFDM */
3459         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3460         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3461
3462         if (il->cfg->sku & IL_SKU_N)
3463                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3464
3465         sband = &il->bands[NL80211_BAND_2GHZ];
3466         sband->channels = channels;
3467         /* OFDM & CCK */
3468         sband->bitrates = rates;
3469         sband->n_bitrates = RATE_COUNT_LEGACY;
3470
3471         if (il->cfg->sku & IL_SKU_N)
3472                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3473
3474         il->ieee_channels = channels;
3475         il->ieee_rates = rates;
3476
3477         for (i = 0; i < il->channel_count; i++) {
3478                 ch = &il->channel_info[i];
3479
3480                 if (!il_is_channel_valid(ch))
3481                         continue;
3482
3483                 sband = &il->bands[ch->band];
3484
3485                 geo_ch = &sband->channels[sband->n_channels++];
3486
3487                 geo_ch->center_freq =
3488                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3489                 geo_ch->max_power = ch->max_power_avg;
3490                 geo_ch->max_antenna_gain = 0xff;
3491                 geo_ch->hw_value = ch->channel;
3492
3493                 if (il_is_channel_valid(ch)) {
3494                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3495                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3496
3497                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3498                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3499
3500                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3501                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3502
3503                         geo_ch->flags |= ch->ht40_extension_channel;
3504
3505                         if (ch->max_power_avg > max_tx_power)
3506                                 max_tx_power = ch->max_power_avg;
3507                 } else {
3508                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3509                 }
3510
3511                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3512                        geo_ch->center_freq,
3513                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3514                        geo_ch->
3515                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3516                        geo_ch->flags);
3517         }
3518
3519         il->tx_power_device_lmt = max_tx_power;
3520         il->tx_power_user_lmt = max_tx_power;
3521         il->tx_power_next = max_tx_power;
3522
3523         if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3524             (il->cfg->sku & IL_SKU_A)) {
3525                 IL_INFO("Incorrectly detected BG card as ABG. "
3526                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3527                         il->pci_dev->device, il->pci_dev->subsystem_device);
3528                 il->cfg->sku &= ~IL_SKU_A;
3529         }
3530
3531         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3532                 il->bands[NL80211_BAND_2GHZ].n_channels,
3533                 il->bands[NL80211_BAND_5GHZ].n_channels);
3534
3535         set_bit(S_GEO_CONFIGURED, &il->status);
3536
3537         return 0;
3538 }
3539 EXPORT_SYMBOL(il_init_geos);
3540
3541 /*
3542  * il_free_geos - undo allocations in il_init_geos
3543  */
3544 void
3545 il_free_geos(struct il_priv *il)
3546 {
3547         kfree(il->ieee_channels);
3548         kfree(il->ieee_rates);
3549         clear_bit(S_GEO_CONFIGURED, &il->status);
3550 }
3551 EXPORT_SYMBOL(il_free_geos);
3552
3553 static bool
3554 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3555                         u16 channel, u8 extension_chan_offset)
3556 {
3557         const struct il_channel_info *ch_info;
3558
3559         ch_info = il_get_channel_info(il, band, channel);
3560         if (!il_is_channel_valid(ch_info))
3561                 return false;
3562
3563         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3564                 return !(ch_info->
3565                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3566         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3567                 return !(ch_info->
3568                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3569
3570         return false;
3571 }
3572
3573 bool
3574 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3575 {
3576         if (!il->ht.enabled || !il->ht.is_40mhz)
3577                 return false;
3578
3579         /*
3580          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3581          * the bit will not set if it is pure 40MHz case
3582          */
3583         if (ht_cap && !ht_cap->ht_supported)
3584                 return false;
3585
3586 #ifdef CONFIG_IWLEGACY_DEBUGFS
3587         if (il->disable_ht40)
3588                 return false;
3589 #endif
3590
3591         return il_is_channel_extension(il, il->band,
3592                                        le16_to_cpu(il->staging.channel),
3593                                        il->ht.extension_chan_offset);
3594 }
3595 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3596
3597 static u16 noinline
3598 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3599 {
3600         u16 new_val;
3601         u16 beacon_factor;
3602
3603         /*
3604          * If mac80211 hasn't given us a beacon interval, program
3605          * the default into the device.
3606          */
3607         if (!beacon_val)
3608                 return DEFAULT_BEACON_INTERVAL;
3609
3610         /*
3611          * If the beacon interval we obtained from the peer
3612          * is too large, we'll have to wake up more often
3613          * (and in IBSS case, we'll beacon too much)
3614          *
3615          * For example, if max_beacon_val is 4096, and the
3616          * requested beacon interval is 7000, we'll have to
3617          * use 3500 to be able to wake up on the beacons.
3618          *
3619          * This could badly influence beacon detection stats.
3620          */
3621
3622         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3623         new_val = beacon_val / beacon_factor;
3624
3625         if (!new_val)
3626                 new_val = max_beacon_val;
3627
3628         return new_val;
3629 }
3630
3631 int
3632 il_send_rxon_timing(struct il_priv *il)
3633 {
3634         u64 tsf;
3635         s32 interval_tm, rem;
3636         struct ieee80211_conf *conf = NULL;
3637         u16 beacon_int;
3638         struct ieee80211_vif *vif = il->vif;
3639
3640         conf = &il->hw->conf;
3641
3642         lockdep_assert_held(&il->mutex);
3643
3644         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3645
3646         il->timing.timestamp = cpu_to_le64(il->timestamp);
3647         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3648
3649         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3650
3651         /*
3652          * TODO: For IBSS we need to get atim_win from mac80211,
3653          *       for now just always use 0
3654          */
3655         il->timing.atim_win = 0;
3656
3657         beacon_int =
3658             il_adjust_beacon_interval(beacon_int,
3659                                       il->hw_params.max_beacon_itrvl *
3660                                       TIME_UNIT);
3661         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3662
3663         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3664         interval_tm = beacon_int * TIME_UNIT;
3665         rem = do_div(tsf, interval_tm);
3666         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3667
3668         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3669
3670         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3671                 le16_to_cpu(il->timing.beacon_interval),
3672                 le32_to_cpu(il->timing.beacon_init_val),
3673                 le16_to_cpu(il->timing.atim_win));
3674
3675         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3676                                &il->timing);
3677 }
3678 EXPORT_SYMBOL(il_send_rxon_timing);
3679
3680 void
3681 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3682 {
3683         struct il_rxon_cmd *rxon = &il->staging;
3684
3685         if (hw_decrypt)
3686                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3687         else
3688                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3689
3690 }
3691 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3692
3693 /* validate RXON structure is valid */
3694 int
3695 il_check_rxon_cmd(struct il_priv *il)
3696 {
3697         struct il_rxon_cmd *rxon = &il->staging;
3698         bool error = false;
3699
3700         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3701                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3702                         IL_WARN("check 2.4G: wrong narrow\n");
3703                         error = true;
3704                 }
3705                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3706                         IL_WARN("check 2.4G: wrong radar\n");
3707                         error = true;
3708                 }
3709         } else {
3710                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3711                         IL_WARN("check 5.2G: not short slot!\n");
3712                         error = true;
3713                 }
3714                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3715                         IL_WARN("check 5.2G: CCK!\n");
3716                         error = true;
3717                 }
3718         }
3719         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3720                 IL_WARN("mac/bssid mcast!\n");
3721                 error = true;
3722         }
3723
3724         /* make sure basic rates 6Mbps and 1Mbps are supported */
3725         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3726             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3727                 IL_WARN("neither 1 nor 6 are basic\n");
3728                 error = true;
3729         }
3730
3731         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3732                 IL_WARN("aid > 2007\n");
3733                 error = true;
3734         }
3735
3736         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3737             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3738                 IL_WARN("CCK and short slot\n");
3739                 error = true;
3740         }
3741
3742         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3743             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3744                 IL_WARN("CCK and auto detect");
3745                 error = true;
3746         }
3747
3748         if ((rxon->
3749              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3750             RXON_FLG_TGG_PROTECT_MSK) {
3751                 IL_WARN("TGg but no auto-detect\n");
3752                 error = true;
3753         }
3754
3755         if (error)
3756                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3757
3758         if (error) {
3759                 IL_ERR("Invalid RXON\n");
3760                 return -EINVAL;
3761         }
3762         return 0;
3763 }
3764 EXPORT_SYMBOL(il_check_rxon_cmd);
3765
3766 /**
3767  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3768  * @il: staging_rxon is compared to active_rxon
3769  *
3770  * If the RXON structure is changing enough to require a new tune,
3771  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3772  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3773  */
3774 int
3775 il_full_rxon_required(struct il_priv *il)
3776 {
3777         const struct il_rxon_cmd *staging = &il->staging;
3778         const struct il_rxon_cmd *active = &il->active;
3779
3780 #define CHK(cond)                                                       \
3781         if ((cond)) {                                                   \
3782                 D_INFO("need full RXON - " #cond "\n"); \
3783                 return 1;                                               \
3784         }
3785
3786 #define CHK_NEQ(c1, c2)                                         \
3787         if ((c1) != (c2)) {                                     \
3788                 D_INFO("need full RXON - "      \
3789                                #c1 " != " #c2 " - %d != %d\n",  \
3790                                (c1), (c2));                     \
3791                 return 1;                                       \
3792         }
3793
3794         /* These items are only settable from the full RXON command */
3795         CHK(!il_is_associated(il));
3796         CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3797         CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3798         CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3799                                      active->wlap_bssid_addr));
3800         CHK_NEQ(staging->dev_type, active->dev_type);
3801         CHK_NEQ(staging->channel, active->channel);
3802         CHK_NEQ(staging->air_propagation, active->air_propagation);
3803         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3804                 active->ofdm_ht_single_stream_basic_rates);
3805         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3806                 active->ofdm_ht_dual_stream_basic_rates);
3807         CHK_NEQ(staging->assoc_id, active->assoc_id);
3808
3809         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3810          * be updated with the RXON_ASSOC command -- however only some
3811          * flag transitions are allowed using RXON_ASSOC */
3812
3813         /* Check if we are not switching bands */
3814         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3815                 active->flags & RXON_FLG_BAND_24G_MSK);
3816
3817         /* Check if we are switching association toggle */
3818         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3819                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3820
3821 #undef CHK
3822 #undef CHK_NEQ
3823
3824         return 0;
3825 }
3826 EXPORT_SYMBOL(il_full_rxon_required);
3827
3828 u8
3829 il_get_lowest_plcp(struct il_priv *il)
3830 {
3831         /*
3832          * Assign the lowest rate -- should really get this from
3833          * the beacon skb from mac80211.
3834          */
3835         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3836                 return RATE_1M_PLCP;
3837         else
3838                 return RATE_6M_PLCP;
3839 }
3840 EXPORT_SYMBOL(il_get_lowest_plcp);
3841
3842 static void
3843 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3844 {
3845         struct il_rxon_cmd *rxon = &il->staging;
3846
3847         if (!il->ht.enabled) {
3848                 rxon->flags &=
3849                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3850                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3851                       | RXON_FLG_HT_PROT_MSK);
3852                 return;
3853         }
3854
3855         rxon->flags |=
3856             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3857
3858         /* Set up channel bandwidth:
3859          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3860         /* clear the HT channel mode before set the mode */
3861         rxon->flags &=
3862             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3863         if (il_is_ht40_tx_allowed(il, NULL)) {
3864                 /* pure ht40 */
3865                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3866                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3867                         /* Note: control channel is opposite of extension channel */
3868                         switch (il->ht.extension_chan_offset) {
3869                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3870                                 rxon->flags &=
3871                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3872                                 break;
3873                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3874                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3875                                 break;
3876                         }
3877                 } else {
3878                         /* Note: control channel is opposite of extension channel */
3879                         switch (il->ht.extension_chan_offset) {
3880                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3881                                 rxon->flags &=
3882                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3883                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3884                                 break;
3885                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3886                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3887                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3888                                 break;
3889                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3890                         default:
3891                                 /* channel location only valid if in Mixed mode */
3892                                 IL_ERR("invalid extension channel offset\n");
3893                                 break;
3894                         }
3895                 }
3896         } else {
3897                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3898         }
3899
3900         if (il->ops->set_rxon_chain)
3901                 il->ops->set_rxon_chain(il);
3902
3903         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3904                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3905                 il->ht.protection, il->ht.extension_chan_offset);
3906 }
3907
3908 void
3909 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3910 {
3911         _il_set_rxon_ht(il, ht_conf);
3912 }
3913 EXPORT_SYMBOL(il_set_rxon_ht);
3914
3915 /* Return valid, unused, channel for a passive scan to reset the RF */
3916 u8
3917 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3918 {
3919         const struct il_channel_info *ch_info;
3920         int i;
3921         u8 channel = 0;
3922         u8 min, max;
3923
3924         if (band == NL80211_BAND_5GHZ) {
3925                 min = 14;
3926                 max = il->channel_count;
3927         } else {
3928                 min = 0;
3929                 max = 14;
3930         }
3931
3932         for (i = min; i < max; i++) {
3933                 channel = il->channel_info[i].channel;
3934                 if (channel == le16_to_cpu(il->staging.channel))
3935                         continue;
3936
3937                 ch_info = il_get_channel_info(il, band, channel);
3938                 if (il_is_channel_valid(ch_info))
3939                         break;
3940         }
3941
3942         return channel;
3943 }
3944 EXPORT_SYMBOL(il_get_single_channel_number);
3945
3946 /**
3947  * il_set_rxon_channel - Set the band and channel values in staging RXON
3948  * @ch: requested channel as a pointer to struct ieee80211_channel
3949
3950  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3951  * in the staging RXON flag structure based on the ch->band
3952  */
3953 int
3954 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3955 {
3956         enum nl80211_band band = ch->band;
3957         u16 channel = ch->hw_value;
3958
3959         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3960                 return 0;
3961
3962         il->staging.channel = cpu_to_le16(channel);
3963         if (band == NL80211_BAND_5GHZ)
3964                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3965         else
3966                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3967
3968         il->band = band;
3969
3970         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3971
3972         return 0;
3973 }
3974 EXPORT_SYMBOL(il_set_rxon_channel);
3975
3976 void
3977 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3978                       struct ieee80211_vif *vif)
3979 {
3980         if (band == NL80211_BAND_5GHZ) {
3981                 il->staging.flags &=
3982                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3983                       RXON_FLG_CCK_MSK);
3984                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3985         } else {
3986                 /* Copied from il_post_associate() */
3987                 if (vif && vif->bss_conf.use_short_slot)
3988                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3989                 else
3990                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3991
3992                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3993                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3994                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3995         }
3996 }
3997 EXPORT_SYMBOL(il_set_flags_for_band);
3998
3999 /*
4000  * initialize rxon structure with default values from eeprom
4001  */
4002 void
4003 il_connection_init_rx_config(struct il_priv *il)
4004 {
4005         const struct il_channel_info *ch_info;
4006
4007         memset(&il->staging, 0, sizeof(il->staging));
4008
4009         switch (il->iw_mode) {
4010         case NL80211_IFTYPE_UNSPECIFIED:
4011                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4012                 break;
4013         case NL80211_IFTYPE_STATION:
4014                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4015                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4016                 break;
4017         case NL80211_IFTYPE_ADHOC:
4018                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4019                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4020                 il->staging.filter_flags =
4021                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4022                 break;
4023         default:
4024                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4025                 return;
4026         }
4027
4028 #if 0
4029         /* TODO:  Figure out when short_preamble would be set and cache from
4030          * that */
4031         if (!hw_to_local(il->hw)->short_preamble)
4032                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4033         else
4034                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4035 #endif
4036
4037         ch_info =
4038             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4039
4040         if (!ch_info)
4041                 ch_info = &il->channel_info[0];
4042
4043         il->staging.channel = cpu_to_le16(ch_info->channel);
4044         il->band = ch_info->band;
4045
4046         il_set_flags_for_band(il, il->band, il->vif);
4047
4048         il->staging.ofdm_basic_rates =
4049             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4050         il->staging.cck_basic_rates =
4051             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4052
4053         /* clear both MIX and PURE40 mode flag */
4054         il->staging.flags &=
4055             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4056         if (il->vif)
4057                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4058
4059         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4060         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4061 }
4062 EXPORT_SYMBOL(il_connection_init_rx_config);
4063
4064 void
4065 il_set_rate(struct il_priv *il)
4066 {
4067         const struct ieee80211_supported_band *hw = NULL;
4068         struct ieee80211_rate *rate;
4069         int i;
4070
4071         hw = il_get_hw_mode(il, il->band);
4072         if (!hw) {
4073                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4074                 return;
4075         }
4076
4077         il->active_rate = 0;
4078
4079         for (i = 0; i < hw->n_bitrates; i++) {
4080                 rate = &(hw->bitrates[i]);
4081                 if (rate->hw_value < RATE_COUNT_LEGACY)
4082                         il->active_rate |= (1 << rate->hw_value);
4083         }
4084
4085         D_RATE("Set active_rate = %0x\n", il->active_rate);
4086
4087         il->staging.cck_basic_rates =
4088             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4089
4090         il->staging.ofdm_basic_rates =
4091             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4092 }
4093 EXPORT_SYMBOL(il_set_rate);
4094
4095 void
4096 il_chswitch_done(struct il_priv *il, bool is_success)
4097 {
4098         if (test_bit(S_EXIT_PENDING, &il->status))
4099                 return;
4100
4101         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4102                 ieee80211_chswitch_done(il->vif, is_success);
4103 }
4104 EXPORT_SYMBOL(il_chswitch_done);
4105
4106 void
4107 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4108 {
4109         struct il_rx_pkt *pkt = rxb_addr(rxb);
4110         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4111         struct il_rxon_cmd *rxon = (void *)&il->active;
4112
4113         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4114                 return;
4115
4116         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4117                 rxon->channel = csa->channel;
4118                 il->staging.channel = csa->channel;
4119                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4120                 il_chswitch_done(il, true);
4121         } else {
4122                 IL_ERR("CSA notif (fail) : channel %d\n",
4123                        le16_to_cpu(csa->channel));
4124                 il_chswitch_done(il, false);
4125         }
4126 }
4127 EXPORT_SYMBOL(il_hdl_csa);
4128
4129 #ifdef CONFIG_IWLEGACY_DEBUG
4130 void
4131 il_print_rx_config_cmd(struct il_priv *il)
4132 {
4133         struct il_rxon_cmd *rxon = &il->staging;
4134
4135         D_RADIO("RX CONFIG:\n");
4136         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4137         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4138         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4139         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4140         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4141         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4142         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4143         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4144         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4145         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4146 }
4147 EXPORT_SYMBOL(il_print_rx_config_cmd);
4148 #endif
4149 /**
4150  * il_irq_handle_error - called for HW or SW error interrupt from card
4151  */
4152 void
4153 il_irq_handle_error(struct il_priv *il)
4154 {
4155         /* Set the FW error flag -- cleared on il_down */
4156         set_bit(S_FW_ERROR, &il->status);
4157
4158         /* Cancel currently queued command. */
4159         clear_bit(S_HCMD_ACTIVE, &il->status);
4160
4161         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4162
4163         il->ops->dump_nic_error_log(il);
4164         if (il->ops->dump_fh)
4165                 il->ops->dump_fh(il, NULL, false);
4166 #ifdef CONFIG_IWLEGACY_DEBUG
4167         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4168                 il_print_rx_config_cmd(il);
4169 #endif
4170
4171         wake_up(&il->wait_command_queue);
4172
4173         /* Keep the restart process from trying to send host
4174          * commands by clearing the INIT status bit */
4175         clear_bit(S_READY, &il->status);
4176
4177         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4178                 IL_DBG(IL_DL_FW_ERRORS,
4179                        "Restarting adapter due to uCode error.\n");
4180
4181                 if (il->cfg->mod_params->restart_fw)
4182                         queue_work(il->workqueue, &il->restart);
4183         }
4184 }
4185 EXPORT_SYMBOL(il_irq_handle_error);
4186
4187 static int
4188 _il_apm_stop_master(struct il_priv *il)
4189 {
4190         int ret = 0;
4191
4192         /* stop device's busmaster DMA activity */
4193         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4194
4195         ret =
4196             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4197                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4198         if (ret < 0)
4199                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4200
4201         D_INFO("stop master\n");
4202
4203         return ret;
4204 }
4205
4206 void
4207 _il_apm_stop(struct il_priv *il)
4208 {
4209         lockdep_assert_held(&il->reg_lock);
4210
4211         D_INFO("Stop card, put in low power state\n");
4212
4213         /* Stop device's DMA activity */
4214         _il_apm_stop_master(il);
4215
4216         /* Reset the entire device */
4217         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4218
4219         udelay(10);
4220
4221         /*
4222          * Clear "initialization complete" bit to move adapter from
4223          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4224          */
4225         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4226 }
4227 EXPORT_SYMBOL(_il_apm_stop);
4228
4229 void
4230 il_apm_stop(struct il_priv *il)
4231 {
4232         unsigned long flags;
4233
4234         spin_lock_irqsave(&il->reg_lock, flags);
4235         _il_apm_stop(il);
4236         spin_unlock_irqrestore(&il->reg_lock, flags);
4237 }
4238 EXPORT_SYMBOL(il_apm_stop);
4239
4240 /*
4241  * Start up NIC's basic functionality after it has been reset
4242  * (e.g. after platform boot, or shutdown via il_apm_stop())
4243  * NOTE:  This does not load uCode nor start the embedded processor
4244  */
4245 int
4246 il_apm_init(struct il_priv *il)
4247 {
4248         int ret = 0;
4249         u16 lctl;
4250
4251         D_INFO("Init card's basic functions\n");
4252
4253         /*
4254          * Use "set_bit" below rather than "write", to preserve any hardware
4255          * bits already set by default after reset.
4256          */
4257
4258         /* Disable L0S exit timer (platform NMI Work/Around) */
4259         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4260                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4261
4262         /*
4263          * Disable L0s without affecting L1;
4264          *  don't wait for ICH L0s (ICH bug W/A)
4265          */
4266         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4267                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4268
4269         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4270         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4271
4272         /*
4273          * Enable HAP INTA (interrupt from management bus) to
4274          * wake device's PCI Express link L1a -> L0s
4275          * NOTE:  This is no-op for 3945 (non-existent bit)
4276          */
4277         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4278                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4279
4280         /*
4281          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4282          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4283          * If so (likely), disable L0S, so device moves directly L0->L1;
4284          *    costs negligible amount of power savings.
4285          * If not (unlikely), enable L0S, so there is at least some
4286          *    power savings, even without L1.
4287          */
4288         if (il->cfg->set_l0s) {
4289                 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4290                 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4291                         /* L1-ASPM enabled; disable(!) L0S  */
4292                         il_set_bit(il, CSR_GIO_REG,
4293                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4294                         D_POWER("L1 Enabled; Disabling L0S\n");
4295                 } else {
4296                         /* L1-ASPM disabled; enable(!) L0S */
4297                         il_clear_bit(il, CSR_GIO_REG,
4298                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4299                         D_POWER("L1 Disabled; Enabling L0S\n");
4300                 }
4301         }
4302
4303         /* Configure analog phase-lock-loop before activating to D0A */
4304         if (il->cfg->pll_cfg_val)
4305                 il_set_bit(il, CSR_ANA_PLL_CFG,
4306                            il->cfg->pll_cfg_val);
4307
4308         /*
4309          * Set "initialization complete" bit to move adapter from
4310          * D0U* --> D0A* (powered-up active) state.
4311          */
4312         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4313
4314         /*
4315          * Wait for clock stabilization; once stabilized, access to
4316          * device-internal resources is supported, e.g. il_wr_prph()
4317          * and accesses to uCode SRAM.
4318          */
4319         ret =
4320             _il_poll_bit(il, CSR_GP_CNTRL,
4321                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4322                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4323         if (ret < 0) {
4324                 D_INFO("Failed to init the card\n");
4325                 goto out;
4326         }
4327
4328         /*
4329          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4330          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4331          *
4332          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4333          * do not disable clocks.  This preserves any hardware bits already
4334          * set by default in "CLK_CTRL_REG" after reset.
4335          */
4336         if (il->cfg->use_bsm)
4337                 il_wr_prph(il, APMG_CLK_EN_REG,
4338                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4339         else
4340                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4341         udelay(20);
4342
4343         /* Disable L1-Active */
4344         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4345                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4346
4347 out:
4348         return ret;
4349 }
4350 EXPORT_SYMBOL(il_apm_init);
4351
4352 int
4353 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4354 {
4355         int ret;
4356         s8 prev_tx_power;
4357         bool defer;
4358
4359         lockdep_assert_held(&il->mutex);
4360
4361         if (il->tx_power_user_lmt == tx_power && !force)
4362                 return 0;
4363
4364         if (!il->ops->send_tx_power)
4365                 return -EOPNOTSUPP;
4366
4367         /* 0 dBm mean 1 milliwatt */
4368         if (tx_power < 0) {
4369                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4370                 return -EINVAL;
4371         }
4372
4373         if (tx_power > il->tx_power_device_lmt) {
4374                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4375                         tx_power, il->tx_power_device_lmt);
4376                 return -EINVAL;
4377         }
4378
4379         if (!il_is_ready_rf(il))
4380                 return -EIO;
4381
4382         /* scan complete and commit_rxon use tx_power_next value,
4383          * it always need to be updated for newest request */
4384         il->tx_power_next = tx_power;
4385
4386         /* do not set tx power when scanning or channel changing */
4387         defer = test_bit(S_SCANNING, &il->status) ||
4388             memcmp(&il->active, &il->staging, sizeof(il->staging));
4389         if (defer && !force) {
4390                 D_INFO("Deferring tx power set\n");
4391                 return 0;
4392         }
4393
4394         prev_tx_power = il->tx_power_user_lmt;
4395         il->tx_power_user_lmt = tx_power;
4396
4397         ret = il->ops->send_tx_power(il);
4398
4399         /* if fail to set tx_power, restore the orig. tx power */
4400         if (ret) {
4401                 il->tx_power_user_lmt = prev_tx_power;
4402                 il->tx_power_next = prev_tx_power;
4403         }
4404         return ret;
4405 }
4406 EXPORT_SYMBOL(il_set_tx_power);
4407
4408 void
4409 il_send_bt_config(struct il_priv *il)
4410 {
4411         struct il_bt_cmd bt_cmd = {
4412                 .lead_time = BT_LEAD_TIME_DEF,
4413                 .max_kill = BT_MAX_KILL_DEF,
4414                 .kill_ack_mask = 0,
4415                 .kill_cts_mask = 0,
4416         };
4417
4418         if (!bt_coex_active)
4419                 bt_cmd.flags = BT_COEX_DISABLE;
4420         else
4421                 bt_cmd.flags = BT_COEX_ENABLE;
4422
4423         D_INFO("BT coex %s\n",
4424                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4425
4426         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4427                 IL_ERR("failed to send BT Coex Config\n");
4428 }
4429 EXPORT_SYMBOL(il_send_bt_config);
4430
4431 int
4432 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4433 {
4434         struct il_stats_cmd stats_cmd = {
4435                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4436         };
4437
4438         if (flags & CMD_ASYNC)
4439                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4440                                              &stats_cmd, NULL);
4441         else
4442                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4443                                        &stats_cmd);
4444 }
4445 EXPORT_SYMBOL(il_send_stats_request);
4446
4447 void
4448 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4449 {
4450 #ifdef CONFIG_IWLEGACY_DEBUG
4451         struct il_rx_pkt *pkt = rxb_addr(rxb);
4452         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4453         D_RX("sleep mode: %d, src: %d\n",
4454              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4455 #endif
4456 }
4457 EXPORT_SYMBOL(il_hdl_pm_sleep);
4458
4459 void
4460 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4461 {
4462         struct il_rx_pkt *pkt = rxb_addr(rxb);
4463         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4464         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4465                 il_get_cmd_string(pkt->hdr.cmd));
4466         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4467 }
4468 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4469
4470 void
4471 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4472 {
4473         struct il_rx_pkt *pkt = rxb_addr(rxb);
4474
4475         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4476                "seq 0x%04X ser 0x%08X\n",
4477                le32_to_cpu(pkt->u.err_resp.error_type),
4478                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4479                pkt->u.err_resp.cmd_id,
4480                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4481                le32_to_cpu(pkt->u.err_resp.error_info));
4482 }
4483 EXPORT_SYMBOL(il_hdl_error);
4484
4485 void
4486 il_clear_isr_stats(struct il_priv *il)
4487 {
4488         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4489 }
4490
4491 int
4492 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4493                const struct ieee80211_tx_queue_params *params)
4494 {
4495         struct il_priv *il = hw->priv;
4496         unsigned long flags;
4497         int q;
4498
4499         D_MAC80211("enter\n");
4500
4501         if (!il_is_ready_rf(il)) {
4502                 D_MAC80211("leave - RF not ready\n");
4503                 return -EIO;
4504         }
4505
4506         if (queue >= AC_NUM) {
4507                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4508                 return 0;
4509         }
4510
4511         q = AC_NUM - 1 - queue;
4512
4513         spin_lock_irqsave(&il->lock, flags);
4514
4515         il->qos_data.def_qos_parm.ac[q].cw_min =
4516             cpu_to_le16(params->cw_min);
4517         il->qos_data.def_qos_parm.ac[q].cw_max =
4518             cpu_to_le16(params->cw_max);
4519         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4520         il->qos_data.def_qos_parm.ac[q].edca_txop =
4521             cpu_to_le16((params->txop * 32));
4522
4523         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4524
4525         spin_unlock_irqrestore(&il->lock, flags);
4526
4527         D_MAC80211("leave\n");
4528         return 0;
4529 }
4530 EXPORT_SYMBOL(il_mac_conf_tx);
4531
4532 int
4533 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4534 {
4535         struct il_priv *il = hw->priv;
4536         int ret;
4537
4538         D_MAC80211("enter\n");
4539
4540         ret = (il->ibss_manager == IL_IBSS_MANAGER);
4541
4542         D_MAC80211("leave ret %d\n", ret);
4543         return ret;
4544 }
4545 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4546
4547 static int
4548 il_set_mode(struct il_priv *il)
4549 {
4550         il_connection_init_rx_config(il);
4551
4552         if (il->ops->set_rxon_chain)
4553                 il->ops->set_rxon_chain(il);
4554
4555         return il_commit_rxon(il);
4556 }
4557
4558 int
4559 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4560 {
4561         struct il_priv *il = hw->priv;
4562         int err;
4563         bool reset;
4564
4565         mutex_lock(&il->mutex);
4566         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4567
4568         if (!il_is_ready_rf(il)) {
4569                 IL_WARN("Try to add interface when device not ready\n");
4570                 err = -EINVAL;
4571                 goto out;
4572         }
4573
4574         /*
4575          * We do not support multiple virtual interfaces, but on hardware reset
4576          * we have to add the same interface again.
4577          */
4578         reset = (il->vif == vif);
4579         if (il->vif && !reset) {
4580                 err = -EOPNOTSUPP;
4581                 goto out;
4582         }
4583
4584         il->vif = vif;
4585         il->iw_mode = vif->type;
4586
4587         err = il_set_mode(il);
4588         if (err) {
4589                 IL_WARN("Fail to set mode %d\n", vif->type);
4590                 if (!reset) {
4591                         il->vif = NULL;
4592                         il->iw_mode = NL80211_IFTYPE_STATION;
4593                 }
4594         }
4595
4596 out:
4597         D_MAC80211("leave err %d\n", err);
4598         mutex_unlock(&il->mutex);
4599
4600         return err;
4601 }
4602 EXPORT_SYMBOL(il_mac_add_interface);
4603
4604 static void
4605 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4606 {
4607         lockdep_assert_held(&il->mutex);
4608
4609         if (il->scan_vif == vif) {
4610                 il_scan_cancel_timeout(il, 200);
4611                 il_force_scan_end(il);
4612         }
4613
4614         il_set_mode(il);
4615 }
4616
4617 void
4618 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4619 {
4620         struct il_priv *il = hw->priv;
4621
4622         mutex_lock(&il->mutex);
4623         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4624
4625         WARN_ON(il->vif != vif);
4626         il->vif = NULL;
4627         il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4628         il_teardown_interface(il, vif);
4629         eth_zero_addr(il->bssid);
4630
4631         D_MAC80211("leave\n");
4632         mutex_unlock(&il->mutex);
4633 }
4634 EXPORT_SYMBOL(il_mac_remove_interface);
4635
4636 int
4637 il_alloc_txq_mem(struct il_priv *il)
4638 {
4639         if (!il->txq)
4640                 il->txq =
4641                     kcalloc(il->cfg->num_of_queues,
4642                             sizeof(struct il_tx_queue),
4643                             GFP_KERNEL);
4644         if (!il->txq) {
4645                 IL_ERR("Not enough memory for txq\n");
4646                 return -ENOMEM;
4647         }
4648         return 0;
4649 }
4650 EXPORT_SYMBOL(il_alloc_txq_mem);
4651
4652 void
4653 il_free_txq_mem(struct il_priv *il)
4654 {
4655         kfree(il->txq);
4656         il->txq = NULL;
4657 }
4658 EXPORT_SYMBOL(il_free_txq_mem);
4659
4660 int
4661 il_force_reset(struct il_priv *il, bool external)
4662 {
4663         struct il_force_reset *force_reset;
4664
4665         if (test_bit(S_EXIT_PENDING, &il->status))
4666                 return -EINVAL;
4667
4668         force_reset = &il->force_reset;
4669         force_reset->reset_request_count++;
4670         if (!external) {
4671                 if (force_reset->last_force_reset_jiffies &&
4672                     time_after(force_reset->last_force_reset_jiffies +
4673                                force_reset->reset_duration, jiffies)) {
4674                         D_INFO("force reset rejected\n");
4675                         force_reset->reset_reject_count++;
4676                         return -EAGAIN;
4677                 }
4678         }
4679         force_reset->reset_success_count++;
4680         force_reset->last_force_reset_jiffies = jiffies;
4681
4682         /*
4683          * if the request is from external(ex: debugfs),
4684          * then always perform the request in regardless the module
4685          * parameter setting
4686          * if the request is from internal (uCode error or driver
4687          * detect failure), then fw_restart module parameter
4688          * need to be check before performing firmware reload
4689          */
4690
4691         if (!external && !il->cfg->mod_params->restart_fw) {
4692                 D_INFO("Cancel firmware reload based on "
4693                        "module parameter setting\n");
4694                 return 0;
4695         }
4696
4697         IL_ERR("On demand firmware reload\n");
4698
4699         /* Set the FW error flag -- cleared on il_down */
4700         set_bit(S_FW_ERROR, &il->status);
4701         wake_up(&il->wait_command_queue);
4702         /*
4703          * Keep the restart process from trying to send host
4704          * commands by clearing the INIT status bit
4705          */
4706         clear_bit(S_READY, &il->status);
4707         queue_work(il->workqueue, &il->restart);
4708
4709         return 0;
4710 }
4711 EXPORT_SYMBOL(il_force_reset);
4712
4713 int
4714 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4715                         enum nl80211_iftype newtype, bool newp2p)
4716 {
4717         struct il_priv *il = hw->priv;
4718         int err;
4719
4720         mutex_lock(&il->mutex);
4721         D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4722                     vif->type, vif->addr, newtype, newp2p);
4723
4724         if (newp2p) {
4725                 err = -EOPNOTSUPP;
4726                 goto out;
4727         }
4728
4729         if (!il->vif || !il_is_ready_rf(il)) {
4730                 /*
4731                  * Huh? But wait ... this can maybe happen when
4732                  * we're in the middle of a firmware restart!
4733                  */
4734                 err = -EBUSY;
4735                 goto out;
4736         }
4737
4738         /* success */
4739         vif->type = newtype;
4740         vif->p2p = false;
4741         il->iw_mode = newtype;
4742         il_teardown_interface(il, vif);
4743         err = 0;
4744
4745 out:
4746         D_MAC80211("leave err %d\n", err);
4747         mutex_unlock(&il->mutex);
4748
4749         return err;
4750 }
4751 EXPORT_SYMBOL(il_mac_change_interface);
4752
4753 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4754                   u32 queues, bool drop)
4755 {
4756         struct il_priv *il = hw->priv;
4757         unsigned long timeout = jiffies + msecs_to_jiffies(500);
4758         int i;
4759
4760         mutex_lock(&il->mutex);
4761         D_MAC80211("enter\n");
4762
4763         if (il->txq == NULL)
4764                 goto out;
4765
4766         for (i = 0; i < il->hw_params.max_txq_num; i++) {
4767                 struct il_queue *q;
4768
4769                 if (i == il->cmd_queue)
4770                         continue;
4771
4772                 q = &il->txq[i].q;
4773                 if (q->read_ptr == q->write_ptr)
4774                         continue;
4775
4776                 if (time_after(jiffies, timeout)) {
4777                         IL_ERR("Failed to flush queue %d\n", q->id);
4778                         break;
4779                 }
4780
4781                 msleep(20);
4782         }
4783 out:
4784         D_MAC80211("leave\n");
4785         mutex_unlock(&il->mutex);
4786 }
4787 EXPORT_SYMBOL(il_mac_flush);
4788
4789 /*
4790  * On every watchdog tick we check (latest) time stamp. If it does not
4791  * change during timeout period and queue is not empty we reset firmware.
4792  */
4793 static int
4794 il_check_stuck_queue(struct il_priv *il, int cnt)
4795 {
4796         struct il_tx_queue *txq = &il->txq[cnt];
4797         struct il_queue *q = &txq->q;
4798         unsigned long timeout;
4799         unsigned long now = jiffies;
4800         int ret;
4801
4802         if (q->read_ptr == q->write_ptr) {
4803                 txq->time_stamp = now;
4804                 return 0;
4805         }
4806
4807         timeout =
4808             txq->time_stamp +
4809             msecs_to_jiffies(il->cfg->wd_timeout);
4810
4811         if (time_after(now, timeout)) {
4812                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4813                        jiffies_to_msecs(now - txq->time_stamp));
4814                 ret = il_force_reset(il, false);
4815                 return (ret == -EAGAIN) ? 0 : 1;
4816         }
4817
4818         return 0;
4819 }
4820
4821 /*
4822  * Making watchdog tick be a quarter of timeout assure we will
4823  * discover the queue hung between timeout and 1.25*timeout
4824  */
4825 #define IL_WD_TICK(timeout) ((timeout) / 4)
4826
4827 /*
4828  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4829  * we reset the firmware. If everything is fine just rearm the timer.
4830  */
4831 void
4832 il_bg_watchdog(struct timer_list *t)
4833 {
4834         struct il_priv *il = from_timer(il, t, watchdog);
4835         int cnt;
4836         unsigned long timeout;
4837
4838         if (test_bit(S_EXIT_PENDING, &il->status))
4839                 return;
4840
4841         timeout = il->cfg->wd_timeout;
4842         if (timeout == 0)
4843                 return;
4844
4845         /* monitor and check for stuck cmd queue */
4846         if (il_check_stuck_queue(il, il->cmd_queue))
4847                 return;
4848
4849         /* monitor and check for other stuck queues */
4850         for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4851                 /* skip as we already checked the command queue */
4852                 if (cnt == il->cmd_queue)
4853                         continue;
4854                 if (il_check_stuck_queue(il, cnt))
4855                         return;
4856         }
4857
4858         mod_timer(&il->watchdog,
4859                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4860 }
4861 EXPORT_SYMBOL(il_bg_watchdog);
4862
4863 void
4864 il_setup_watchdog(struct il_priv *il)
4865 {
4866         unsigned int timeout = il->cfg->wd_timeout;
4867
4868         if (timeout)
4869                 mod_timer(&il->watchdog,
4870                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4871         else
4872                 del_timer(&il->watchdog);
4873 }
4874 EXPORT_SYMBOL(il_setup_watchdog);
4875
4876 /*
4877  * extended beacon time format
4878  * time in usec will be changed into a 32-bit value in extended:internal format
4879  * the extended part is the beacon counts
4880  * the internal part is the time in usec within one beacon interval
4881  */
4882 u32
4883 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4884 {
4885         u32 quot;
4886         u32 rem;
4887         u32 interval = beacon_interval * TIME_UNIT;
4888
4889         if (!interval || !usec)
4890                 return 0;
4891
4892         quot =
4893             (usec /
4894              interval) & (il_beacon_time_mask_high(il,
4895                                                    il->hw_params.
4896                                                    beacon_time_tsf_bits) >> il->
4897                           hw_params.beacon_time_tsf_bits);
4898         rem =
4899             (usec % interval) & il_beacon_time_mask_low(il,
4900                                                         il->hw_params.
4901                                                         beacon_time_tsf_bits);
4902
4903         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4904 }
4905 EXPORT_SYMBOL(il_usecs_to_beacons);
4906
4907 /* base is usually what we get from ucode with each received frame,
4908  * the same as HW timer counter counting down
4909  */
4910 __le32
4911 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4912                    u32 beacon_interval)
4913 {
4914         u32 base_low = base & il_beacon_time_mask_low(il,
4915                                                       il->hw_params.
4916                                                       beacon_time_tsf_bits);
4917         u32 addon_low = addon & il_beacon_time_mask_low(il,
4918                                                         il->hw_params.
4919                                                         beacon_time_tsf_bits);
4920         u32 interval = beacon_interval * TIME_UNIT;
4921         u32 res = (base & il_beacon_time_mask_high(il,
4922                                                    il->hw_params.
4923                                                    beacon_time_tsf_bits)) +
4924             (addon & il_beacon_time_mask_high(il,
4925                                               il->hw_params.
4926                                               beacon_time_tsf_bits));
4927
4928         if (base_low > addon_low)
4929                 res += base_low - addon_low;
4930         else if (base_low < addon_low) {
4931                 res += interval + base_low - addon_low;
4932                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4933         } else
4934                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4935
4936         return cpu_to_le32(res);
4937 }
4938 EXPORT_SYMBOL(il_add_beacon_time);
4939
4940 #ifdef CONFIG_PM_SLEEP
4941
4942 static int
4943 il_pci_suspend(struct device *device)
4944 {
4945         struct pci_dev *pdev = to_pci_dev(device);
4946         struct il_priv *il = pci_get_drvdata(pdev);
4947
4948         /*
4949          * This function is called when system goes into suspend state
4950          * mac80211 will call il_mac_stop() from the mac80211 suspend function
4951          * first but since il_mac_stop() has no knowledge of who the caller is,
4952          * it will not call apm_ops.stop() to stop the DMA operation.
4953          * Calling apm_ops.stop here to make sure we stop the DMA.
4954          */
4955         il_apm_stop(il);
4956
4957         return 0;
4958 }
4959
4960 static int
4961 il_pci_resume(struct device *device)
4962 {
4963         struct pci_dev *pdev = to_pci_dev(device);
4964         struct il_priv *il = pci_get_drvdata(pdev);
4965         bool hw_rfkill = false;
4966
4967         /*
4968          * We disable the RETRY_TIMEOUT register (0x41) to keep
4969          * PCI Tx retries from interfering with C3 CPU state.
4970          */
4971         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4972
4973         il_enable_interrupts(il);
4974
4975         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4976                 hw_rfkill = true;
4977
4978         if (hw_rfkill)
4979                 set_bit(S_RFKILL, &il->status);
4980         else
4981                 clear_bit(S_RFKILL, &il->status);
4982
4983         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4984
4985         return 0;
4986 }
4987
4988 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4989 EXPORT_SYMBOL(il_pm_ops);
4990
4991 #endif /* CONFIG_PM_SLEEP */
4992
4993 static void
4994 il_update_qos(struct il_priv *il)
4995 {
4996         if (test_bit(S_EXIT_PENDING, &il->status))
4997                 return;
4998
4999         il->qos_data.def_qos_parm.qos_flags = 0;
5000
5001         if (il->qos_data.qos_active)
5002                 il->qos_data.def_qos_parm.qos_flags |=
5003                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5004
5005         if (il->ht.enabled)
5006                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5007
5008         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5009               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5010
5011         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5012                               &il->qos_data.def_qos_parm, NULL);
5013 }
5014
5015 /**
5016  * il_mac_config - mac80211 config callback
5017  */
5018 int
5019 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5020 {
5021         struct il_priv *il = hw->priv;
5022         const struct il_channel_info *ch_info;
5023         struct ieee80211_conf *conf = &hw->conf;
5024         struct ieee80211_channel *channel = conf->chandef.chan;
5025         struct il_ht_config *ht_conf = &il->current_ht_config;
5026         unsigned long flags = 0;
5027         int ret = 0;
5028         u16 ch;
5029         int scan_active = 0;
5030         bool ht_changed = false;
5031
5032         mutex_lock(&il->mutex);
5033         D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5034                    changed);
5035
5036         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5037                 scan_active = 1;
5038                 D_MAC80211("scan active\n");
5039         }
5040
5041         if (changed &
5042             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5043                 /* mac80211 uses static for non-HT which is what we want */
5044                 il->current_ht_config.smps = conf->smps_mode;
5045
5046                 /*
5047                  * Recalculate chain counts.
5048                  *
5049                  * If monitor mode is enabled then mac80211 will
5050                  * set up the SM PS mode to OFF if an HT channel is
5051                  * configured.
5052                  */
5053                 if (il->ops->set_rxon_chain)
5054                         il->ops->set_rxon_chain(il);
5055         }
5056
5057         /* during scanning mac80211 will delay channel setting until
5058          * scan finish with changed = 0
5059          */
5060         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5061
5062                 if (scan_active)
5063                         goto set_ch_out;
5064
5065                 ch = channel->hw_value;
5066                 ch_info = il_get_channel_info(il, channel->band, ch);
5067                 if (!il_is_channel_valid(ch_info)) {
5068                         D_MAC80211("leave - invalid channel\n");
5069                         ret = -EINVAL;
5070                         goto set_ch_out;
5071                 }
5072
5073                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5074                     !il_is_channel_ibss(ch_info)) {
5075                         D_MAC80211("leave - not IBSS channel\n");
5076                         ret = -EINVAL;
5077                         goto set_ch_out;
5078                 }
5079
5080                 spin_lock_irqsave(&il->lock, flags);
5081
5082                 /* Configure HT40 channels */
5083                 if (il->ht.enabled != conf_is_ht(conf)) {
5084                         il->ht.enabled = conf_is_ht(conf);
5085                         ht_changed = true;
5086                 }
5087                 if (il->ht.enabled) {
5088                         if (conf_is_ht40_minus(conf)) {
5089                                 il->ht.extension_chan_offset =
5090                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5091                                 il->ht.is_40mhz = true;
5092                         } else if (conf_is_ht40_plus(conf)) {
5093                                 il->ht.extension_chan_offset =
5094                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5095                                 il->ht.is_40mhz = true;
5096                         } else {
5097                                 il->ht.extension_chan_offset =
5098                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5099                                 il->ht.is_40mhz = false;
5100                         }
5101                 } else
5102                         il->ht.is_40mhz = false;
5103
5104                 /*
5105                  * Default to no protection. Protection mode will
5106                  * later be set from BSS config in il_ht_conf
5107                  */
5108                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5109
5110                 /* if we are switching from ht to 2.4 clear flags
5111                  * from any ht related info since 2.4 does not
5112                  * support ht */
5113                 if ((le16_to_cpu(il->staging.channel) != ch))
5114                         il->staging.flags = 0;
5115
5116                 il_set_rxon_channel(il, channel);
5117                 il_set_rxon_ht(il, ht_conf);
5118
5119                 il_set_flags_for_band(il, channel->band, il->vif);
5120
5121                 spin_unlock_irqrestore(&il->lock, flags);
5122
5123                 if (il->ops->update_bcast_stations)
5124                         ret = il->ops->update_bcast_stations(il);
5125
5126 set_ch_out:
5127                 /* The list of supported rates and rate mask can be different
5128                  * for each band; since the band may have changed, reset
5129                  * the rate mask to what mac80211 lists */
5130                 il_set_rate(il);
5131         }
5132
5133         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5134                 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5135                 if (!il->power_data.ps_disabled)
5136                         IL_WARN_ONCE("Enabling power save might cause firmware crashes\n");
5137                 ret = il_power_update_mode(il, false);
5138                 if (ret)
5139                         D_MAC80211("Error setting sleep level\n");
5140         }
5141
5142         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5143                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5144                            conf->power_level);
5145
5146                 il_set_tx_power(il, conf->power_level, false);
5147         }
5148
5149         if (!il_is_ready(il)) {
5150                 D_MAC80211("leave - not ready\n");
5151                 goto out;
5152         }
5153
5154         if (scan_active)
5155                 goto out;
5156
5157         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5158                 il_commit_rxon(il);
5159         else
5160                 D_INFO("Not re-sending same RXON configuration.\n");
5161         if (ht_changed)
5162                 il_update_qos(il);
5163
5164 out:
5165         D_MAC80211("leave ret %d\n", ret);
5166         mutex_unlock(&il->mutex);
5167
5168         return ret;
5169 }
5170 EXPORT_SYMBOL(il_mac_config);
5171
5172 void
5173 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5174 {
5175         struct il_priv *il = hw->priv;
5176         unsigned long flags;
5177
5178         mutex_lock(&il->mutex);
5179         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5180
5181         spin_lock_irqsave(&il->lock, flags);
5182
5183         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5184
5185         /* new association get rid of ibss beacon skb */
5186         if (il->beacon_skb)
5187                 dev_kfree_skb(il->beacon_skb);
5188         il->beacon_skb = NULL;
5189         il->timestamp = 0;
5190
5191         spin_unlock_irqrestore(&il->lock, flags);
5192
5193         il_scan_cancel_timeout(il, 100);
5194         if (!il_is_ready_rf(il)) {
5195                 D_MAC80211("leave - not ready\n");
5196                 mutex_unlock(&il->mutex);
5197                 return;
5198         }
5199
5200         /* we are restarting association process */
5201         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5202         il_commit_rxon(il);
5203
5204         il_set_rate(il);
5205
5206         D_MAC80211("leave\n");
5207         mutex_unlock(&il->mutex);
5208 }
5209 EXPORT_SYMBOL(il_mac_reset_tsf);
5210
5211 static void
5212 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5213 {
5214         struct il_ht_config *ht_conf = &il->current_ht_config;
5215         struct ieee80211_sta *sta;
5216         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5217
5218         D_ASSOC("enter:\n");
5219
5220         if (!il->ht.enabled)
5221                 return;
5222
5223         il->ht.protection =
5224             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5225         il->ht.non_gf_sta_present =
5226             !!(bss_conf->
5227                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5228
5229         ht_conf->single_chain_sufficient = false;
5230
5231         switch (vif->type) {
5232         case NL80211_IFTYPE_STATION:
5233                 rcu_read_lock();
5234                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5235                 if (sta) {
5236                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5237                         int maxstreams;
5238
5239                         maxstreams =
5240                             (ht_cap->mcs.
5241                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5242                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5243                         maxstreams += 1;
5244
5245                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5246                             ht_cap->mcs.rx_mask[2] == 0)
5247                                 ht_conf->single_chain_sufficient = true;
5248                         if (maxstreams <= 1)
5249                                 ht_conf->single_chain_sufficient = true;
5250                 } else {
5251                         /*
5252                          * If at all, this can only happen through a race
5253                          * when the AP disconnects us while we're still
5254                          * setting up the connection, in that case mac80211
5255                          * will soon tell us about that.
5256                          */
5257                         ht_conf->single_chain_sufficient = true;
5258                 }
5259                 rcu_read_unlock();
5260                 break;
5261         case NL80211_IFTYPE_ADHOC:
5262                 ht_conf->single_chain_sufficient = true;
5263                 break;
5264         default:
5265                 break;
5266         }
5267
5268         D_ASSOC("leave\n");
5269 }
5270
5271 static inline void
5272 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5273 {
5274         /*
5275          * inform the ucode that there is no longer an
5276          * association and that no more packets should be
5277          * sent
5278          */
5279         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5280         il->staging.assoc_id = 0;
5281         il_commit_rxon(il);
5282 }
5283
5284 static void
5285 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5286 {
5287         struct il_priv *il = hw->priv;
5288         unsigned long flags;
5289         __le64 timestamp;
5290         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5291
5292         if (!skb)
5293                 return;
5294
5295         D_MAC80211("enter\n");
5296
5297         lockdep_assert_held(&il->mutex);
5298
5299         if (!il->beacon_enabled) {
5300                 IL_ERR("update beacon with no beaconing enabled\n");
5301                 dev_kfree_skb(skb);
5302                 return;
5303         }
5304
5305         spin_lock_irqsave(&il->lock, flags);
5306
5307         if (il->beacon_skb)
5308                 dev_kfree_skb(il->beacon_skb);
5309
5310         il->beacon_skb = skb;
5311
5312         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5313         il->timestamp = le64_to_cpu(timestamp);
5314
5315         D_MAC80211("leave\n");
5316         spin_unlock_irqrestore(&il->lock, flags);
5317
5318         if (!il_is_ready_rf(il)) {
5319                 D_MAC80211("leave - RF not ready\n");
5320                 return;
5321         }
5322
5323         il->ops->post_associate(il);
5324 }
5325
5326 void
5327 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5328                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5329 {
5330         struct il_priv *il = hw->priv;
5331         int ret;
5332
5333         mutex_lock(&il->mutex);
5334         D_MAC80211("enter: changes 0x%x\n", changes);
5335
5336         if (!il_is_alive(il)) {
5337                 D_MAC80211("leave - not alive\n");
5338                 mutex_unlock(&il->mutex);
5339                 return;
5340         }
5341
5342         if (changes & BSS_CHANGED_QOS) {
5343                 unsigned long flags;
5344
5345                 spin_lock_irqsave(&il->lock, flags);
5346                 il->qos_data.qos_active = bss_conf->qos;
5347                 il_update_qos(il);
5348                 spin_unlock_irqrestore(&il->lock, flags);
5349         }
5350
5351         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5352                 /* FIXME: can we remove beacon_enabled ? */
5353                 if (vif->bss_conf.enable_beacon)
5354                         il->beacon_enabled = true;
5355                 else
5356                         il->beacon_enabled = false;
5357         }
5358
5359         if (changes & BSS_CHANGED_BSSID) {
5360                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5361
5362                 /*
5363                  * On passive channel we wait with blocked queues to see if
5364                  * there is traffic on that channel. If no frame will be
5365                  * received (what is very unlikely since scan detects AP on
5366                  * that channel, but theoretically possible), mac80211 associate
5367                  * procedure will time out and mac80211 will call us with NULL
5368                  * bssid. We have to unblock queues on such condition.
5369                  */
5370                 if (is_zero_ether_addr(bss_conf->bssid))
5371                         il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5372
5373                 /*
5374                  * If there is currently a HW scan going on in the background,
5375                  * then we need to cancel it, otherwise sometimes we are not
5376                  * able to authenticate (FIXME: why ?)
5377                  */
5378                 if (il_scan_cancel_timeout(il, 100)) {
5379                         D_MAC80211("leave - scan abort failed\n");
5380                         mutex_unlock(&il->mutex);
5381                         return;
5382                 }
5383
5384                 /* mac80211 only sets assoc when in STATION mode */
5385                 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5386
5387                 /* FIXME: currently needed in a few places */
5388                 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5389         }
5390
5391         /*
5392          * This needs to be after setting the BSSID in case
5393          * mac80211 decides to do both changes at once because
5394          * it will invoke post_associate.
5395          */
5396         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5397                 il_beacon_update(hw, vif);
5398
5399         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5400                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5401                 if (bss_conf->use_short_preamble)
5402                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5403                 else
5404                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5405         }
5406
5407         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5408                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5409                 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5410                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5411                 else
5412                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5413                 if (bss_conf->use_cts_prot)
5414                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5415                 else
5416                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5417         }
5418
5419         if (changes & BSS_CHANGED_BASIC_RATES) {
5420                 /* XXX use this information
5421                  *
5422                  * To do that, remove code from il_set_rate() and put something
5423                  * like this here:
5424                  *
5425                  if (A-band)
5426                  il->staging.ofdm_basic_rates =
5427                  bss_conf->basic_rates;
5428                  else
5429                  il->staging.ofdm_basic_rates =
5430                  bss_conf->basic_rates >> 4;
5431                  il->staging.cck_basic_rates =
5432                  bss_conf->basic_rates & 0xF;
5433                  */
5434         }
5435
5436         if (changes & BSS_CHANGED_HT) {
5437                 il_ht_conf(il, vif);
5438
5439                 if (il->ops->set_rxon_chain)
5440                         il->ops->set_rxon_chain(il);
5441         }
5442
5443         if (changes & BSS_CHANGED_ASSOC) {
5444                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5445                 if (bss_conf->assoc) {
5446                         il->timestamp = bss_conf->sync_tsf;
5447
5448                         if (!il_is_rfkill(il))
5449                                 il->ops->post_associate(il);
5450                 } else
5451                         il_set_no_assoc(il, vif);
5452         }
5453
5454         if (changes && il_is_associated(il) && bss_conf->aid) {
5455                 D_MAC80211("Changes (%#x) while associated\n", changes);
5456                 ret = il_send_rxon_assoc(il);
5457                 if (!ret) {
5458                         /* Sync active_rxon with latest change. */
5459                         memcpy((void *)&il->active, &il->staging,
5460                                sizeof(struct il_rxon_cmd));
5461                 }
5462         }
5463
5464         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5465                 if (vif->bss_conf.enable_beacon) {
5466                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5467                                ETH_ALEN);
5468                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5469                         il->ops->config_ap(il);
5470                 } else
5471                         il_set_no_assoc(il, vif);
5472         }
5473
5474         if (changes & BSS_CHANGED_IBSS) {
5475                 ret = il->ops->manage_ibss_station(il, vif,
5476                                                    bss_conf->ibss_joined);
5477                 if (ret)
5478                         IL_ERR("failed to %s IBSS station %pM\n",
5479                                bss_conf->ibss_joined ? "add" : "remove",
5480                                bss_conf->bssid);
5481         }
5482
5483         D_MAC80211("leave\n");
5484         mutex_unlock(&il->mutex);
5485 }
5486 EXPORT_SYMBOL(il_mac_bss_info_changed);
5487
5488 irqreturn_t
5489 il_isr(int irq, void *data)
5490 {
5491         struct il_priv *il = data;
5492         u32 inta, inta_mask;
5493         u32 inta_fh;
5494         unsigned long flags;
5495         if (!il)
5496                 return IRQ_NONE;
5497
5498         spin_lock_irqsave(&il->lock, flags);
5499
5500         /* Disable (but don't clear!) interrupts here to avoid
5501          *    back-to-back ISRs and sporadic interrupts from our NIC.
5502          * If we have something to service, the tasklet will re-enable ints.
5503          * If we *don't* have something, we'll re-enable before leaving here. */
5504         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5505         _il_wr(il, CSR_INT_MASK, 0x00000000);
5506
5507         /* Discover which interrupts are active/pending */
5508         inta = _il_rd(il, CSR_INT);
5509         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5510
5511         /* Ignore interrupt if there's nothing in NIC to service.
5512          * This may be due to IRQ shared with another device,
5513          * or due to sporadic interrupts thrown from our NIC. */
5514         if (!inta && !inta_fh) {
5515                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5516                 goto none;
5517         }
5518
5519         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5520                 /* Hardware disappeared. It might have already raised
5521                  * an interrupt */
5522                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5523                 goto unplugged;
5524         }
5525
5526         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5527               inta_fh);
5528
5529         inta &= ~CSR_INT_BIT_SCD;
5530
5531         /* il_irq_tasklet() will service interrupts and re-enable them */
5532         if (likely(inta || inta_fh))
5533                 tasklet_schedule(&il->irq_tasklet);
5534
5535 unplugged:
5536         spin_unlock_irqrestore(&il->lock, flags);
5537         return IRQ_HANDLED;
5538
5539 none:
5540         /* re-enable interrupts here since we don't have anything to service. */
5541         /* only Re-enable if disabled by irq */
5542         if (test_bit(S_INT_ENABLED, &il->status))
5543                 il_enable_interrupts(il);
5544         spin_unlock_irqrestore(&il->lock, flags);
5545         return IRQ_NONE;
5546 }
5547 EXPORT_SYMBOL(il_isr);
5548
5549 /*
5550  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5551  *  function.
5552  */
5553 void
5554 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5555                      __le16 fc, __le32 *tx_flags)
5556 {
5557         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5558                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5559                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5560                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5561
5562                 if (!ieee80211_is_mgmt(fc))
5563                         return;
5564
5565                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5566                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5567                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5568                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5569                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5570                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5571                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5572                         break;
5573                 }
5574         } else if (info->control.rates[0].
5575                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5576                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5577                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5578                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5579         }
5580 }
5581 EXPORT_SYMBOL(il_tx_cmd_protection);