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         int 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         static 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         struct il_rx_pkt *pkt = rxb_addr(rxb);
1434         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1435
1436         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1437                scan_notif->scanned_channels, scan_notif->tsf_low,
1438                scan_notif->tsf_high, scan_notif->status);
1439
1440         /* The HW is no longer scanning */
1441         clear_bit(S_SCAN_HW, &il->status);
1442
1443         D_SCAN("Scan on %sGHz took %dms\n",
1444                (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1445                jiffies_to_msecs(jiffies - il->scan_start));
1446
1447         queue_work(il->workqueue, &il->scan_completed);
1448 }
1449
1450 void
1451 il_setup_rx_scan_handlers(struct il_priv *il)
1452 {
1453         /* scan handlers */
1454         il->handlers[C_SCAN] = il_hdl_scan;
1455         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1456         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1457         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1458 }
1459 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1460
1461 u16
1462 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1463                          u8 n_probes)
1464 {
1465         if (band == NL80211_BAND_5GHZ)
1466                 return IL_ACTIVE_DWELL_TIME_52 +
1467                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1468         else
1469                 return IL_ACTIVE_DWELL_TIME_24 +
1470                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1471 }
1472 EXPORT_SYMBOL(il_get_active_dwell_time);
1473
1474 u16
1475 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1476                           struct ieee80211_vif *vif)
1477 {
1478         u16 value;
1479
1480         u16 passive =
1481             (band ==
1482              NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1483             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1484             IL_PASSIVE_DWELL_TIME_52;
1485
1486         if (il_is_any_associated(il)) {
1487                 /*
1488                  * If we're associated, we clamp the maximum passive
1489                  * dwell time to be 98% of the smallest beacon interval
1490                  * (minus 2 * channel tune time)
1491                  */
1492                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1493                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1494                         value = IL_PASSIVE_DWELL_BASE;
1495                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1496                 passive = min(value, passive);
1497         }
1498
1499         return passive;
1500 }
1501 EXPORT_SYMBOL(il_get_passive_dwell_time);
1502
1503 void
1504 il_init_scan_params(struct il_priv *il)
1505 {
1506         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1507         if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1508                 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1509         if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1510                 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1511 }
1512 EXPORT_SYMBOL(il_init_scan_params);
1513
1514 static int
1515 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1516 {
1517         int ret;
1518
1519         lockdep_assert_held(&il->mutex);
1520
1521         cancel_delayed_work(&il->scan_check);
1522
1523         if (!il_is_ready_rf(il)) {
1524                 IL_WARN("Request scan called when driver not ready.\n");
1525                 return -EIO;
1526         }
1527
1528         if (test_bit(S_SCAN_HW, &il->status)) {
1529                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1530                 return -EBUSY;
1531         }
1532
1533         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1534                 D_SCAN("Scan request while abort pending.\n");
1535                 return -EBUSY;
1536         }
1537
1538         D_SCAN("Starting scan...\n");
1539
1540         set_bit(S_SCANNING, &il->status);
1541         il->scan_start = jiffies;
1542
1543         ret = il->ops->request_scan(il, vif);
1544         if (ret) {
1545                 clear_bit(S_SCANNING, &il->status);
1546                 return ret;
1547         }
1548
1549         queue_delayed_work(il->workqueue, &il->scan_check,
1550                            IL_SCAN_CHECK_WATCHDOG);
1551
1552         return 0;
1553 }
1554
1555 int
1556 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1557                struct ieee80211_scan_request *hw_req)
1558 {
1559         struct cfg80211_scan_request *req = &hw_req->req;
1560         struct il_priv *il = hw->priv;
1561         int ret;
1562
1563         if (req->n_channels == 0) {
1564                 IL_ERR("Can not scan on no channels.\n");
1565                 return -EINVAL;
1566         }
1567
1568         mutex_lock(&il->mutex);
1569         D_MAC80211("enter\n");
1570
1571         if (test_bit(S_SCANNING, &il->status)) {
1572                 D_SCAN("Scan already in progress.\n");
1573                 ret = -EAGAIN;
1574                 goto out_unlock;
1575         }
1576
1577         /* mac80211 will only ask for one band at a time */
1578         il->scan_request = req;
1579         il->scan_vif = vif;
1580         il->scan_band = req->channels[0]->band;
1581
1582         ret = il_scan_initiate(il, vif);
1583
1584 out_unlock:
1585         D_MAC80211("leave ret %d\n", ret);
1586         mutex_unlock(&il->mutex);
1587
1588         return ret;
1589 }
1590 EXPORT_SYMBOL(il_mac_hw_scan);
1591
1592 static void
1593 il_bg_scan_check(struct work_struct *data)
1594 {
1595         struct il_priv *il =
1596             container_of(data, struct il_priv, scan_check.work);
1597
1598         D_SCAN("Scan check work\n");
1599
1600         /* Since we are here firmware does not finish scan and
1601          * most likely is in bad shape, so we don't bother to
1602          * send abort command, just force scan complete to mac80211 */
1603         mutex_lock(&il->mutex);
1604         il_force_scan_end(il);
1605         mutex_unlock(&il->mutex);
1606 }
1607
1608 /*
1609  * il_fill_probe_req - fill in all required fields and IE for probe request
1610  */
1611 u16
1612 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1613                   const u8 *ta, const u8 *ies, int ie_len, int left)
1614 {
1615         int len = 0;
1616         u8 *pos = NULL;
1617
1618         /* Make sure there is enough space for the probe request,
1619          * two mandatory IEs and the data */
1620         left -= 24;
1621         if (left < 0)
1622                 return 0;
1623
1624         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1625         eth_broadcast_addr(frame->da);
1626         memcpy(frame->sa, ta, ETH_ALEN);
1627         eth_broadcast_addr(frame->bssid);
1628         frame->seq_ctrl = 0;
1629
1630         len += 24;
1631
1632         /* ...next IE... */
1633         pos = &frame->u.probe_req.variable[0];
1634
1635         /* fill in our indirect SSID IE */
1636         left -= 2;
1637         if (left < 0)
1638                 return 0;
1639         *pos++ = WLAN_EID_SSID;
1640         *pos++ = 0;
1641
1642         len += 2;
1643
1644         if (WARN_ON(left < ie_len))
1645                 return len;
1646
1647         if (ies && ie_len) {
1648                 memcpy(pos, ies, ie_len);
1649                 len += ie_len;
1650         }
1651
1652         return (u16) len;
1653 }
1654 EXPORT_SYMBOL(il_fill_probe_req);
1655
1656 static void
1657 il_bg_abort_scan(struct work_struct *work)
1658 {
1659         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1660
1661         D_SCAN("Abort scan work\n");
1662
1663         /* We keep scan_check work queued in case when firmware will not
1664          * report back scan completed notification */
1665         mutex_lock(&il->mutex);
1666         il_scan_cancel_timeout(il, 200);
1667         mutex_unlock(&il->mutex);
1668 }
1669
1670 static void
1671 il_bg_scan_completed(struct work_struct *work)
1672 {
1673         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1674         bool aborted;
1675
1676         D_SCAN("Completed scan.\n");
1677
1678         cancel_delayed_work(&il->scan_check);
1679
1680         mutex_lock(&il->mutex);
1681
1682         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1683         if (aborted)
1684                 D_SCAN("Aborted scan completed.\n");
1685
1686         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1687                 D_SCAN("Scan already completed.\n");
1688                 goto out_settings;
1689         }
1690
1691         il_complete_scan(il, aborted);
1692
1693 out_settings:
1694         /* Can we still talk to firmware ? */
1695         if (!il_is_ready_rf(il))
1696                 goto out;
1697
1698         /*
1699          * We do not commit power settings while scan is pending,
1700          * do it now if the settings changed.
1701          */
1702         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1703         il_set_tx_power(il, il->tx_power_next, false);
1704
1705         il->ops->post_scan(il);
1706
1707 out:
1708         mutex_unlock(&il->mutex);
1709 }
1710
1711 void
1712 il_setup_scan_deferred_work(struct il_priv *il)
1713 {
1714         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1715         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1716         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1717 }
1718 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1719
1720 void
1721 il_cancel_scan_deferred_work(struct il_priv *il)
1722 {
1723         cancel_work_sync(&il->abort_scan);
1724         cancel_work_sync(&il->scan_completed);
1725
1726         if (cancel_delayed_work_sync(&il->scan_check)) {
1727                 mutex_lock(&il->mutex);
1728                 il_force_scan_end(il);
1729                 mutex_unlock(&il->mutex);
1730         }
1731 }
1732 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1733
1734 /* il->sta_lock must be held */
1735 static void
1736 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1737 {
1738
1739         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1740                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1741                        sta_id, il->stations[sta_id].sta.sta.addr);
1742
1743         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1744                 D_ASSOC("STA id %u addr %pM already present"
1745                         " in uCode (according to driver)\n", sta_id,
1746                         il->stations[sta_id].sta.sta.addr);
1747         } else {
1748                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1749                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1750                         il->stations[sta_id].sta.sta.addr);
1751         }
1752 }
1753
1754 static int
1755 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1756                         struct il_rx_pkt *pkt, bool sync)
1757 {
1758         u8 sta_id = addsta->sta.sta_id;
1759         unsigned long flags;
1760         int ret = -EIO;
1761
1762         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1763                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1764                 return ret;
1765         }
1766
1767         D_INFO("Processing response for adding station %u\n", sta_id);
1768
1769         spin_lock_irqsave(&il->sta_lock, flags);
1770
1771         switch (pkt->u.add_sta.status) {
1772         case ADD_STA_SUCCESS_MSK:
1773                 D_INFO("C_ADD_STA PASSED\n");
1774                 il_sta_ucode_activate(il, sta_id);
1775                 ret = 0;
1776                 break;
1777         case ADD_STA_NO_ROOM_IN_TBL:
1778                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1779                 break;
1780         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1781                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1782                        sta_id);
1783                 break;
1784         case ADD_STA_MODIFY_NON_EXIST_STA:
1785                 IL_ERR("Attempting to modify non-existing station %d\n",
1786                        sta_id);
1787                 break;
1788         default:
1789                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1790                 break;
1791         }
1792
1793         D_INFO("%s station id %u addr %pM\n",
1794                il->stations[sta_id].sta.mode ==
1795                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1796                il->stations[sta_id].sta.sta.addr);
1797
1798         /*
1799          * XXX: The MAC address in the command buffer is often changed from
1800          * the original sent to the device. That is, the MAC address
1801          * written to the command buffer often is not the same MAC address
1802          * read from the command buffer when the command returns. This
1803          * issue has not yet been resolved and this debugging is left to
1804          * observe the problem.
1805          */
1806         D_INFO("%s station according to cmd buffer %pM\n",
1807                il->stations[sta_id].sta.mode ==
1808                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1809         spin_unlock_irqrestore(&il->sta_lock, flags);
1810
1811         return ret;
1812 }
1813
1814 static void
1815 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1816                     struct il_rx_pkt *pkt)
1817 {
1818         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1819
1820         il_process_add_sta_resp(il, addsta, pkt, false);
1821
1822 }
1823
1824 int
1825 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1826 {
1827         struct il_rx_pkt *pkt = NULL;
1828         int ret = 0;
1829         u8 data[sizeof(*sta)];
1830         struct il_host_cmd cmd = {
1831                 .id = C_ADD_STA,
1832                 .flags = flags,
1833                 .data = data,
1834         };
1835         u8 sta_id __maybe_unused = sta->sta.sta_id;
1836
1837         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1838                flags & CMD_ASYNC ? "a" : "");
1839
1840         if (flags & CMD_ASYNC)
1841                 cmd.callback = il_add_sta_callback;
1842         else {
1843                 cmd.flags |= CMD_WANT_SKB;
1844                 might_sleep();
1845         }
1846
1847         cmd.len = il->ops->build_addsta_hcmd(sta, data);
1848         ret = il_send_cmd(il, &cmd);
1849         if (ret)
1850                 return ret;
1851         if (flags & CMD_ASYNC)
1852                 return 0;
1853
1854         pkt = (struct il_rx_pkt *)cmd.reply_page;
1855         ret = il_process_add_sta_resp(il, sta, pkt, true);
1856
1857         il_free_pages(il, cmd.reply_page);
1858
1859         return ret;
1860 }
1861 EXPORT_SYMBOL(il_send_add_sta);
1862
1863 static void
1864 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1865 {
1866         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
1867         __le32 sta_flags;
1868
1869         if (!sta || !sta_ht_inf->ht_supported)
1870                 goto done;
1871
1872         D_ASSOC("spatial multiplexing power save mode: %s\n",
1873                 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1874                 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1875                 "disabled");
1876
1877         sta_flags = il->stations[idx].sta.station_flags;
1878
1879         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1880
1881         switch (sta->smps_mode) {
1882         case IEEE80211_SMPS_STATIC:
1883                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1884                 break;
1885         case IEEE80211_SMPS_DYNAMIC:
1886                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1887                 break;
1888         case IEEE80211_SMPS_OFF:
1889                 break;
1890         default:
1891                 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1892                 break;
1893         }
1894
1895         sta_flags |=
1896             cpu_to_le32((u32) sta_ht_inf->
1897                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1898
1899         sta_flags |=
1900             cpu_to_le32((u32) sta_ht_inf->
1901                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1902
1903         if (il_is_ht40_tx_allowed(il, &sta->deflink.ht_cap))
1904                 sta_flags |= STA_FLG_HT40_EN_MSK;
1905         else
1906                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1907
1908         il->stations[idx].sta.station_flags = sta_flags;
1909 done:
1910         return;
1911 }
1912
1913 /*
1914  * il_prep_station - Prepare station information for addition
1915  *
1916  * should be called with sta_lock held
1917  */
1918 u8
1919 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1920                 struct ieee80211_sta *sta)
1921 {
1922         struct il_station_entry *station;
1923         int i;
1924         u8 sta_id = IL_INVALID_STATION;
1925         u16 rate;
1926
1927         if (is_ap)
1928                 sta_id = IL_AP_ID;
1929         else if (is_broadcast_ether_addr(addr))
1930                 sta_id = il->hw_params.bcast_id;
1931         else
1932                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1933                         if (ether_addr_equal(il->stations[i].sta.sta.addr,
1934                                              addr)) {
1935                                 sta_id = i;
1936                                 break;
1937                         }
1938
1939                         if (!il->stations[i].used &&
1940                             sta_id == IL_INVALID_STATION)
1941                                 sta_id = i;
1942                 }
1943
1944         /*
1945          * These two conditions have the same outcome, but keep them
1946          * separate
1947          */
1948         if (unlikely(sta_id == IL_INVALID_STATION))
1949                 return sta_id;
1950
1951         /*
1952          * uCode is not able to deal with multiple requests to add a
1953          * station. Keep track if one is in progress so that we do not send
1954          * another.
1955          */
1956         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1957                 D_INFO("STA %d already in process of being added.\n", sta_id);
1958                 return sta_id;
1959         }
1960
1961         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1962             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1963             ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1964                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1965                         sta_id, addr);
1966                 return sta_id;
1967         }
1968
1969         station = &il->stations[sta_id];
1970         station->used = IL_STA_DRIVER_ACTIVE;
1971         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1972         il->num_stations++;
1973
1974         /* Set up the C_ADD_STA command to send to device */
1975         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1976         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1977         station->sta.mode = 0;
1978         station->sta.sta.sta_id = sta_id;
1979         station->sta.station_flags = 0;
1980
1981         /*
1982          * OK to call unconditionally, since local stations (IBSS BSSID
1983          * STA and broadcast STA) pass in a NULL sta, and mac80211
1984          * doesn't allow HT IBSS.
1985          */
1986         il_set_ht_add_station(il, sta_id, sta);
1987
1988         /* 3945 only */
1989         rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1990         /* Turn on both antennas for the station... */
1991         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1992
1993         return sta_id;
1994
1995 }
1996 EXPORT_SYMBOL_GPL(il_prep_station);
1997
1998 #define STA_WAIT_TIMEOUT (HZ/2)
1999
2000 /*
2001  * il_add_station_common -
2002  */
2003 int
2004 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2005                       struct ieee80211_sta *sta, u8 *sta_id_r)
2006 {
2007         unsigned long flags_spin;
2008         int ret = 0;
2009         u8 sta_id;
2010         struct il_addsta_cmd sta_cmd;
2011
2012         *sta_id_r = 0;
2013         spin_lock_irqsave(&il->sta_lock, flags_spin);
2014         sta_id = il_prep_station(il, addr, is_ap, sta);
2015         if (sta_id == IL_INVALID_STATION) {
2016                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2017                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2018                 return -EINVAL;
2019         }
2020
2021         /*
2022          * uCode is not able to deal with multiple requests to add a
2023          * station. Keep track if one is in progress so that we do not send
2024          * another.
2025          */
2026         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2027                 D_INFO("STA %d already in process of being added.\n", sta_id);
2028                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2029                 return -EEXIST;
2030         }
2031
2032         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2033             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2034                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2035                         sta_id, addr);
2036                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2037                 return -EEXIST;
2038         }
2039
2040         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2041         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2042                sizeof(struct il_addsta_cmd));
2043         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2044
2045         /* Add station to device's station table */
2046         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2047         if (ret) {
2048                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2049                 IL_ERR("Adding station %pM failed.\n",
2050                        il->stations[sta_id].sta.sta.addr);
2051                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2052                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2053                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2054         }
2055         *sta_id_r = sta_id;
2056         return ret;
2057 }
2058 EXPORT_SYMBOL(il_add_station_common);
2059
2060 /*
2061  * il_sta_ucode_deactivate - deactivate ucode status for a station
2062  *
2063  * il->sta_lock must be held
2064  */
2065 static void
2066 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2067 {
2068         /* Ucode must be active and driver must be non active */
2069         if ((il->stations[sta_id].
2070              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2071             IL_STA_UCODE_ACTIVE)
2072                 IL_ERR("removed non active STA %u\n", sta_id);
2073
2074         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2075
2076         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2077         D_ASSOC("Removed STA %u\n", sta_id);
2078 }
2079
2080 static int
2081 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2082                        bool temporary)
2083 {
2084         struct il_rx_pkt *pkt;
2085         int ret;
2086
2087         unsigned long flags_spin;
2088         struct il_rem_sta_cmd rm_sta_cmd;
2089
2090         struct il_host_cmd cmd = {
2091                 .id = C_REM_STA,
2092                 .len = sizeof(struct il_rem_sta_cmd),
2093                 .flags = CMD_SYNC,
2094                 .data = &rm_sta_cmd,
2095         };
2096
2097         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2098         rm_sta_cmd.num_sta = 1;
2099         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2100
2101         cmd.flags |= CMD_WANT_SKB;
2102
2103         ret = il_send_cmd(il, &cmd);
2104
2105         if (ret)
2106                 return ret;
2107
2108         pkt = (struct il_rx_pkt *)cmd.reply_page;
2109         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2110                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2111                 ret = -EIO;
2112         }
2113
2114         if (!ret) {
2115                 switch (pkt->u.rem_sta.status) {
2116                 case REM_STA_SUCCESS_MSK:
2117                         if (!temporary) {
2118                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2119                                 il_sta_ucode_deactivate(il, sta_id);
2120                                 spin_unlock_irqrestore(&il->sta_lock,
2121                                                        flags_spin);
2122                         }
2123                         D_ASSOC("C_REM_STA PASSED\n");
2124                         break;
2125                 default:
2126                         ret = -EIO;
2127                         IL_ERR("C_REM_STA failed\n");
2128                         break;
2129                 }
2130         }
2131         il_free_pages(il, cmd.reply_page);
2132
2133         return ret;
2134 }
2135
2136 /*
2137  * il_remove_station - Remove driver's knowledge of station.
2138  */
2139 int
2140 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2141 {
2142         unsigned long flags;
2143
2144         if (!il_is_ready(il)) {
2145                 D_INFO("Unable to remove station %pM, device not ready.\n",
2146                        addr);
2147                 /*
2148                  * It is typical for stations to be removed when we are
2149                  * going down. Return success since device will be down
2150                  * soon anyway
2151                  */
2152                 return 0;
2153         }
2154
2155         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2156
2157         if (WARN_ON(sta_id == IL_INVALID_STATION))
2158                 return -EINVAL;
2159
2160         spin_lock_irqsave(&il->sta_lock, flags);
2161
2162         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2163                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2164                 goto out_err;
2165         }
2166
2167         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2168                 D_INFO("Removing %pM but non UCODE active\n", addr);
2169                 goto out_err;
2170         }
2171
2172         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2173                 kfree(il->stations[sta_id].lq);
2174                 il->stations[sta_id].lq = NULL;
2175         }
2176
2177         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2178
2179         il->num_stations--;
2180
2181         BUG_ON(il->num_stations < 0);
2182
2183         spin_unlock_irqrestore(&il->sta_lock, flags);
2184
2185         return il_send_remove_station(il, addr, sta_id, false);
2186 out_err:
2187         spin_unlock_irqrestore(&il->sta_lock, flags);
2188         return -EINVAL;
2189 }
2190 EXPORT_SYMBOL_GPL(il_remove_station);
2191
2192 /*
2193  * il_clear_ucode_stations - clear ucode station table bits
2194  *
2195  * This function clears all the bits in the driver indicating
2196  * which stations are active in the ucode. Call when something
2197  * other than explicit station management would cause this in
2198  * the ucode, e.g. unassociated RXON.
2199  */
2200 void
2201 il_clear_ucode_stations(struct il_priv *il)
2202 {
2203         int i;
2204         unsigned long flags_spin;
2205         bool cleared = false;
2206
2207         D_INFO("Clearing ucode stations in driver\n");
2208
2209         spin_lock_irqsave(&il->sta_lock, flags_spin);
2210         for (i = 0; i < il->hw_params.max_stations; i++) {
2211                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2212                         D_INFO("Clearing ucode active for station %d\n", i);
2213                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2214                         cleared = true;
2215                 }
2216         }
2217         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2218
2219         if (!cleared)
2220                 D_INFO("No active stations found to be cleared\n");
2221 }
2222 EXPORT_SYMBOL(il_clear_ucode_stations);
2223
2224 /*
2225  * il_restore_stations() - Restore driver known stations to device
2226  *
2227  * All stations considered active by driver, but not present in ucode, is
2228  * restored.
2229  *
2230  * Function sleeps.
2231  */
2232 void
2233 il_restore_stations(struct il_priv *il)
2234 {
2235         struct il_addsta_cmd sta_cmd;
2236         struct il_link_quality_cmd lq;
2237         unsigned long flags_spin;
2238         int i;
2239         bool found = false;
2240         int ret;
2241         bool send_lq;
2242
2243         if (!il_is_ready(il)) {
2244                 D_INFO("Not ready yet, not restoring any stations.\n");
2245                 return;
2246         }
2247
2248         D_ASSOC("Restoring all known stations ... start.\n");
2249         spin_lock_irqsave(&il->sta_lock, flags_spin);
2250         for (i = 0; i < il->hw_params.max_stations; i++) {
2251                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2252                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2253                         D_ASSOC("Restoring sta %pM\n",
2254                                 il->stations[i].sta.sta.addr);
2255                         il->stations[i].sta.mode = 0;
2256                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2257                         found = true;
2258                 }
2259         }
2260
2261         for (i = 0; i < il->hw_params.max_stations; i++) {
2262                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2263                         memcpy(&sta_cmd, &il->stations[i].sta,
2264                                sizeof(struct il_addsta_cmd));
2265                         send_lq = false;
2266                         if (il->stations[i].lq) {
2267                                 memcpy(&lq, il->stations[i].lq,
2268                                        sizeof(struct il_link_quality_cmd));
2269                                 send_lq = true;
2270                         }
2271                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2272                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2273                         if (ret) {
2274                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2275                                 IL_ERR("Adding station %pM failed.\n",
2276                                        il->stations[i].sta.sta.addr);
2277                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2278                                 il->stations[i].used &=
2279                                     ~IL_STA_UCODE_INPROGRESS;
2280                                 spin_unlock_irqrestore(&il->sta_lock,
2281                                                        flags_spin);
2282                         }
2283                         /*
2284                          * Rate scaling has already been initialized, send
2285                          * current LQ command
2286                          */
2287                         if (send_lq)
2288                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2289                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2290                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2291                 }
2292         }
2293
2294         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2295         if (!found)
2296                 D_INFO("Restoring all known stations"
2297                        " .... no stations to be restored.\n");
2298         else
2299                 D_INFO("Restoring all known stations" " .... complete.\n");
2300 }
2301 EXPORT_SYMBOL(il_restore_stations);
2302
2303 int
2304 il_get_free_ucode_key_idx(struct il_priv *il)
2305 {
2306         int i;
2307
2308         for (i = 0; i < il->sta_key_max_num; i++)
2309                 if (!test_and_set_bit(i, &il->ucode_key_table))
2310                         return i;
2311
2312         return WEP_INVALID_OFFSET;
2313 }
2314 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2315
2316 void
2317 il_dealloc_bcast_stations(struct il_priv *il)
2318 {
2319         unsigned long flags;
2320         int i;
2321
2322         spin_lock_irqsave(&il->sta_lock, flags);
2323         for (i = 0; i < il->hw_params.max_stations; i++) {
2324                 if (!(il->stations[i].used & IL_STA_BCAST))
2325                         continue;
2326
2327                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2328                 il->num_stations--;
2329                 BUG_ON(il->num_stations < 0);
2330                 kfree(il->stations[i].lq);
2331                 il->stations[i].lq = NULL;
2332         }
2333         spin_unlock_irqrestore(&il->sta_lock, flags);
2334 }
2335 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2336
2337 #ifdef CONFIG_IWLEGACY_DEBUG
2338 static void
2339 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2340 {
2341         int i;
2342         D_RATE("lq station id 0x%x\n", lq->sta_id);
2343         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2344                lq->general_params.dual_stream_ant_msk);
2345
2346         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2347                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2348 }
2349 #else
2350 static inline void
2351 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2352 {
2353 }
2354 #endif
2355
2356 /*
2357  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2358  *
2359  * It sometimes happens when a HT rate has been in use and we
2360  * loose connectivity with AP then mac80211 will first tell us that the
2361  * current channel is not HT anymore before removing the station. In such a
2362  * scenario the RXON flags will be updated to indicate we are not
2363  * communicating HT anymore, but the LQ command may still contain HT rates.
2364  * Test for this to prevent driver from sending LQ command between the time
2365  * RXON flags are updated and when LQ command is updated.
2366  */
2367 static bool
2368 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2369 {
2370         int i;
2371
2372         if (il->ht.enabled)
2373                 return true;
2374
2375         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2376         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2377                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2378                         D_INFO("idx %d of LQ expects HT channel\n", i);
2379                         return false;
2380                 }
2381         }
2382         return true;
2383 }
2384
2385 /*
2386  * il_send_lq_cmd() - Send link quality command
2387  * @init: This command is sent as part of station initialization right
2388  *        after station has been added.
2389  *
2390  * The link quality command is sent as the last step of station creation.
2391  * This is the special case in which init is set and we call a callback in
2392  * this case to clear the state indicating that station creation is in
2393  * progress.
2394  */
2395 int
2396 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2397                u8 flags, bool init)
2398 {
2399         int ret = 0;
2400         unsigned long flags_spin;
2401
2402         struct il_host_cmd cmd = {
2403                 .id = C_TX_LINK_QUALITY_CMD,
2404                 .len = sizeof(struct il_link_quality_cmd),
2405                 .flags = flags,
2406                 .data = lq,
2407         };
2408
2409         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2410                 return -EINVAL;
2411
2412         spin_lock_irqsave(&il->sta_lock, flags_spin);
2413         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2414                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2415                 return -EINVAL;
2416         }
2417         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2418
2419         il_dump_lq_cmd(il, lq);
2420         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2421
2422         if (il_is_lq_table_valid(il, lq))
2423                 ret = il_send_cmd(il, &cmd);
2424         else
2425                 ret = -EINVAL;
2426
2427         if (cmd.flags & CMD_ASYNC)
2428                 return ret;
2429
2430         if (init) {
2431                 D_INFO("init LQ command complete,"
2432                        " clearing sta addition status for sta %d\n",
2433                        lq->sta_id);
2434                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2435                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2436                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2437         }
2438         return ret;
2439 }
2440 EXPORT_SYMBOL(il_send_lq_cmd);
2441
2442 int
2443 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2444                   struct ieee80211_sta *sta)
2445 {
2446         struct il_priv *il = hw->priv;
2447         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2448         int ret;
2449
2450         mutex_lock(&il->mutex);
2451         D_MAC80211("enter station %pM\n", sta->addr);
2452
2453         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2454         if (ret)
2455                 IL_ERR("Error removing station %pM\n", sta->addr);
2456
2457         D_MAC80211("leave ret %d\n", ret);
2458         mutex_unlock(&il->mutex);
2459
2460         return ret;
2461 }
2462 EXPORT_SYMBOL(il_mac_sta_remove);
2463
2464 /************************** RX-FUNCTIONS ****************************/
2465 /*
2466  * Rx theory of operation
2467  *
2468  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2469  * each of which point to Receive Buffers to be filled by the NIC.  These get
2470  * used not only for Rx frames, but for any command response or notification
2471  * from the NIC.  The driver and NIC manage the Rx buffers by means
2472  * of idxes into the circular buffer.
2473  *
2474  * Rx Queue Indexes
2475  * The host/firmware share two idx registers for managing the Rx buffers.
2476  *
2477  * The READ idx maps to the first position that the firmware may be writing
2478  * to -- the driver can read up to (but not including) this position and get
2479  * good data.
2480  * The READ idx is managed by the firmware once the card is enabled.
2481  *
2482  * The WRITE idx maps to the last position the driver has read from -- the
2483  * position preceding WRITE is the last slot the firmware can place a packet.
2484  *
2485  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2486  * WRITE = READ.
2487  *
2488  * During initialization, the host sets up the READ queue position to the first
2489  * IDX position, and WRITE to the last (READ - 1 wrapped)
2490  *
2491  * When the firmware places a packet in a buffer, it will advance the READ idx
2492  * and fire the RX interrupt.  The driver can then query the READ idx and
2493  * process as many packets as possible, moving the WRITE idx forward as it
2494  * resets the Rx queue buffers with new memory.
2495  *
2496  * The management in the driver is as follows:
2497  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2498  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2499  *   to replenish the iwl->rxq->rx_free.
2500  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2501  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2502  *   'processed' and 'read' driver idxes as well)
2503  * + A received packet is processed and handed to the kernel network stack,
2504  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2505  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2506  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2507  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2508  *   were enough free buffers and RX_STALLED is set it is cleared.
2509  *
2510  *
2511  * Driver sequence:
2512  *
2513  * il_rx_queue_alloc()   Allocates rx_free
2514  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2515  *                            il_rx_queue_restock
2516  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2517  *                            queue, updates firmware pointers, and updates
2518  *                            the WRITE idx.  If insufficient rx_free buffers
2519  *                            are available, schedules il_rx_replenish
2520  *
2521  * -- enable interrupts --
2522  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2523  *                            READ IDX, detaching the SKB from the pool.
2524  *                            Moves the packet buffer from queue to rx_used.
2525  *                            Calls il_rx_queue_restock to refill any empty
2526  *                            slots.
2527  * ...
2528  *
2529  */
2530
2531 /*
2532  * il_rx_queue_space - Return number of free slots available in queue.
2533  */
2534 int
2535 il_rx_queue_space(const struct il_rx_queue *q)
2536 {
2537         int s = q->read - q->write;
2538         if (s <= 0)
2539                 s += RX_QUEUE_SIZE;
2540         /* keep some buffer to not confuse full and empty queue */
2541         s -= 2;
2542         if (s < 0)
2543                 s = 0;
2544         return s;
2545 }
2546 EXPORT_SYMBOL(il_rx_queue_space);
2547
2548 /*
2549  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2550  */
2551 void
2552 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2553 {
2554         unsigned long flags;
2555         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2556         u32 reg;
2557
2558         spin_lock_irqsave(&q->lock, flags);
2559
2560         if (q->need_update == 0)
2561                 goto exit_unlock;
2562
2563         /* If power-saving is in use, make sure device is awake */
2564         if (test_bit(S_POWER_PMI, &il->status)) {
2565                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2566
2567                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2568                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2569                                reg);
2570                         il_set_bit(il, CSR_GP_CNTRL,
2571                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2572                         goto exit_unlock;
2573                 }
2574
2575                 q->write_actual = (q->write & ~0x7);
2576                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2577
2578                 /* Else device is assumed to be awake */
2579         } else {
2580                 /* Device expects a multiple of 8 */
2581                 q->write_actual = (q->write & ~0x7);
2582                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2583         }
2584
2585         q->need_update = 0;
2586
2587 exit_unlock:
2588         spin_unlock_irqrestore(&q->lock, flags);
2589 }
2590 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2591
2592 int
2593 il_rx_queue_alloc(struct il_priv *il)
2594 {
2595         struct il_rx_queue *rxq = &il->rxq;
2596         struct device *dev = &il->pci_dev->dev;
2597         int i;
2598
2599         spin_lock_init(&rxq->lock);
2600         INIT_LIST_HEAD(&rxq->rx_free);
2601         INIT_LIST_HEAD(&rxq->rx_used);
2602
2603         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2604         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2605                                      GFP_KERNEL);
2606         if (!rxq->bd)
2607                 goto err_bd;
2608
2609         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2610                                           &rxq->rb_stts_dma, GFP_KERNEL);
2611         if (!rxq->rb_stts)
2612                 goto err_rb;
2613
2614         /* Fill the rx_used queue with _all_ of the Rx buffers */
2615         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2616                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2617
2618         /* Set us so that we have processed and used all buffers, but have
2619          * not restocked the Rx queue with fresh buffers */
2620         rxq->read = rxq->write = 0;
2621         rxq->write_actual = 0;
2622         rxq->free_count = 0;
2623         rxq->need_update = 0;
2624         return 0;
2625
2626 err_rb:
2627         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2628                           rxq->bd_dma);
2629 err_bd:
2630         return -ENOMEM;
2631 }
2632 EXPORT_SYMBOL(il_rx_queue_alloc);
2633
2634 void
2635 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2636 {
2637         struct il_rx_pkt *pkt = rxb_addr(rxb);
2638         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2639
2640         if (!report->state) {
2641                 D_11H("Spectrum Measure Notification: Start\n");
2642                 return;
2643         }
2644
2645         memcpy(&il->measure_report, report, sizeof(*report));
2646         il->measurement_status |= MEASUREMENT_READY;
2647 }
2648 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2649
2650 /*
2651  * returns non-zero if packet should be dropped
2652  */
2653 int
2654 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2655                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2656 {
2657         u16 fc = le16_to_cpu(hdr->frame_control);
2658
2659         /*
2660          * All contexts have the same setting here due to it being
2661          * a module parameter, so OK to check any context.
2662          */
2663         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2664                 return 0;
2665
2666         if (!(fc & IEEE80211_FCTL_PROTECTED))
2667                 return 0;
2668
2669         D_RX("decrypt_res:0x%x\n", decrypt_res);
2670         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2671         case RX_RES_STATUS_SEC_TYPE_TKIP:
2672                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2673                  * Decryption will be done in SW. */
2674                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2675                     RX_RES_STATUS_BAD_KEY_TTAK)
2676                         break;
2677                 fallthrough;
2678
2679         case RX_RES_STATUS_SEC_TYPE_WEP:
2680                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2681                     RX_RES_STATUS_BAD_ICV_MIC) {
2682                         /* bad ICV, the packet is destroyed since the
2683                          * decryption is inplace, drop it */
2684                         D_RX("Packet destroyed\n");
2685                         return -1;
2686                 }
2687                 fallthrough;
2688         case RX_RES_STATUS_SEC_TYPE_CCMP:
2689                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2690                     RX_RES_STATUS_DECRYPT_OK) {
2691                         D_RX("hw decrypt successfully!!!\n");
2692                         stats->flag |= RX_FLAG_DECRYPTED;
2693                 }
2694                 break;
2695
2696         default:
2697                 break;
2698         }
2699         return 0;
2700 }
2701 EXPORT_SYMBOL(il_set_decrypted_flag);
2702
2703 /*
2704  * il_txq_update_write_ptr - Send new write idx to hardware
2705  */
2706 void
2707 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2708 {
2709         u32 reg = 0;
2710         int txq_id = txq->q.id;
2711
2712         if (txq->need_update == 0)
2713                 return;
2714
2715         /* if we're trying to save power */
2716         if (test_bit(S_POWER_PMI, &il->status)) {
2717                 /* wake up nic if it's powered down ...
2718                  * uCode will wake up, and interrupt us again, so next
2719                  * time we'll skip this part. */
2720                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2721
2722                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2723                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2724                                txq_id, reg);
2725                         il_set_bit(il, CSR_GP_CNTRL,
2726                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2727                         return;
2728                 }
2729
2730                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2731
2732                 /*
2733                  * else not in power-save mode,
2734                  * uCode will never sleep when we're
2735                  * trying to tx (during RFKILL, we're not trying to tx).
2736                  */
2737         } else
2738                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2739         txq->need_update = 0;
2740 }
2741 EXPORT_SYMBOL(il_txq_update_write_ptr);
2742
2743 /*
2744  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2745  */
2746 void
2747 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2748 {
2749         struct il_tx_queue *txq = &il->txq[txq_id];
2750         struct il_queue *q = &txq->q;
2751
2752         if (q->n_bd == 0)
2753                 return;
2754
2755         while (q->write_ptr != q->read_ptr) {
2756                 il->ops->txq_free_tfd(il, txq);
2757                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2758         }
2759 }
2760 EXPORT_SYMBOL(il_tx_queue_unmap);
2761
2762 /*
2763  * il_tx_queue_free - Deallocate DMA queue.
2764  * @txq: Transmit queue to deallocate.
2765  *
2766  * Empty queue by removing and destroying all BD's.
2767  * Free all buffers.
2768  * 0-fill, but do not free "txq" descriptor structure.
2769  */
2770 void
2771 il_tx_queue_free(struct il_priv *il, int txq_id)
2772 {
2773         struct il_tx_queue *txq = &il->txq[txq_id];
2774         struct device *dev = &il->pci_dev->dev;
2775         int i;
2776
2777         il_tx_queue_unmap(il, txq_id);
2778
2779         /* De-alloc array of command/tx buffers */
2780         if (txq->cmd) {
2781                 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2782                         kfree(txq->cmd[i]);
2783         }
2784
2785         /* De-alloc circular buffer of TFDs */
2786         if (txq->q.n_bd)
2787                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2788                                   txq->tfds, txq->q.dma_addr);
2789
2790         /* De-alloc array of per-TFD driver data */
2791         kfree(txq->skbs);
2792         txq->skbs = NULL;
2793
2794         /* deallocate arrays */
2795         kfree(txq->cmd);
2796         kfree(txq->meta);
2797         txq->cmd = NULL;
2798         txq->meta = NULL;
2799
2800         /* 0-fill queue descriptor structure */
2801         memset(txq, 0, sizeof(*txq));
2802 }
2803 EXPORT_SYMBOL(il_tx_queue_free);
2804
2805 /*
2806  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2807  */
2808 void
2809 il_cmd_queue_unmap(struct il_priv *il)
2810 {
2811         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2812         struct il_queue *q = &txq->q;
2813         int i;
2814
2815         if (q->n_bd == 0)
2816                 return;
2817
2818         while (q->read_ptr != q->write_ptr) {
2819                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2820
2821                 if (txq->meta[i].flags & CMD_MAPPED) {
2822                         dma_unmap_single(&il->pci_dev->dev,
2823                                          dma_unmap_addr(&txq->meta[i], mapping),
2824                                          dma_unmap_len(&txq->meta[i], len),
2825                                          DMA_BIDIRECTIONAL);
2826                         txq->meta[i].flags = 0;
2827                 }
2828
2829                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2830         }
2831
2832         i = q->n_win;
2833         if (txq->meta[i].flags & CMD_MAPPED) {
2834                 dma_unmap_single(&il->pci_dev->dev,
2835                                  dma_unmap_addr(&txq->meta[i], mapping),
2836                                  dma_unmap_len(&txq->meta[i], len),
2837                                  DMA_BIDIRECTIONAL);
2838                 txq->meta[i].flags = 0;
2839         }
2840 }
2841 EXPORT_SYMBOL(il_cmd_queue_unmap);
2842
2843 /*
2844  * il_cmd_queue_free - Deallocate DMA queue.
2845  *
2846  * Empty queue by removing and destroying all BD's.
2847  * Free all buffers.
2848  * 0-fill, but do not free "txq" descriptor structure.
2849  */
2850 void
2851 il_cmd_queue_free(struct il_priv *il)
2852 {
2853         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2854         struct device *dev = &il->pci_dev->dev;
2855         int i;
2856
2857         il_cmd_queue_unmap(il);
2858
2859         /* De-alloc array of command/tx buffers */
2860         if (txq->cmd) {
2861                 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2862                         kfree(txq->cmd[i]);
2863         }
2864
2865         /* De-alloc circular buffer of TFDs */
2866         if (txq->q.n_bd)
2867                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2868                                   txq->tfds, txq->q.dma_addr);
2869
2870         /* deallocate arrays */
2871         kfree(txq->cmd);
2872         kfree(txq->meta);
2873         txq->cmd = NULL;
2874         txq->meta = NULL;
2875
2876         /* 0-fill queue descriptor structure */
2877         memset(txq, 0, sizeof(*txq));
2878 }
2879 EXPORT_SYMBOL(il_cmd_queue_free);
2880
2881 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2882  * DMA services
2883  *
2884  * Theory of operation
2885  *
2886  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2887  * of buffer descriptors, each of which points to one or more data buffers for
2888  * the device to read from or fill.  Driver and device exchange status of each
2889  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2890  * entries in each circular buffer, to protect against confusing empty and full
2891  * queue states.
2892  *
2893  * The device reads or writes the data in the queues via the device's several
2894  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2895  *
2896  * For Tx queue, there are low mark and high mark limits. If, after queuing
2897  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2898  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2899  * Tx queue resumed.
2900  *
2901  * See more detailed info in 4965.h.
2902  ***************************************************/
2903
2904 int
2905 il_queue_space(const struct il_queue *q)
2906 {
2907         int s = q->read_ptr - q->write_ptr;
2908
2909         if (q->read_ptr > q->write_ptr)
2910                 s -= q->n_bd;
2911
2912         if (s <= 0)
2913                 s += q->n_win;
2914         /* keep some reserve to not confuse empty and full situations */
2915         s -= 2;
2916         if (s < 0)
2917                 s = 0;
2918         return s;
2919 }
2920 EXPORT_SYMBOL(il_queue_space);
2921
2922
2923 /*
2924  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2925  */
2926 static int
2927 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2928 {
2929         /*
2930          * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2931          * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2932          */
2933         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2934         /* FIXME: remove q->n_bd */
2935         q->n_bd = TFD_QUEUE_SIZE_MAX;
2936
2937         q->n_win = slots;
2938         q->id = id;
2939
2940         /* slots_must be power-of-two size, otherwise
2941          * il_get_cmd_idx is broken. */
2942         BUG_ON(!is_power_of_2(slots));
2943
2944         q->low_mark = q->n_win / 4;
2945         if (q->low_mark < 4)
2946                 q->low_mark = 4;
2947
2948         q->high_mark = q->n_win / 8;
2949         if (q->high_mark < 2)
2950                 q->high_mark = 2;
2951
2952         q->write_ptr = q->read_ptr = 0;
2953
2954         return 0;
2955 }
2956
2957 /*
2958  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2959  */
2960 static int
2961 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2962 {
2963         struct device *dev = &il->pci_dev->dev;
2964         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2965
2966         /* Driver ilate data, only for Tx (not command) queues,
2967          * not shared with device. */
2968         if (id != il->cmd_queue) {
2969                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2970                                     sizeof(struct sk_buff *),
2971                                     GFP_KERNEL);
2972                 if (!txq->skbs) {
2973                         IL_ERR("Fail to alloc skbs\n");
2974                         goto error;
2975                 }
2976         } else
2977                 txq->skbs = NULL;
2978
2979         /* Circular buffer of transmit frame descriptors (TFDs),
2980          * shared with device */
2981         txq->tfds =
2982             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2983         if (!txq->tfds)
2984                 goto error;
2985
2986         txq->q.id = id;
2987
2988         return 0;
2989
2990 error:
2991         kfree(txq->skbs);
2992         txq->skbs = NULL;
2993
2994         return -ENOMEM;
2995 }
2996
2997 /*
2998  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2999  */
3000 int
3001 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3002 {
3003         int i, len, ret;
3004         int slots, actual_slots;
3005         struct il_tx_queue *txq = &il->txq[txq_id];
3006
3007         /*
3008          * Alloc buffer array for commands (Tx or other types of commands).
3009          * For the command queue (#4/#9), allocate command space + one big
3010          * command for scan, since scan command is very huge; the system will
3011          * not have two scans at the same time, so only one is needed.
3012          * For normal Tx queues (all other queues), no super-size command
3013          * space is needed.
3014          */
3015         if (txq_id == il->cmd_queue) {
3016                 slots = TFD_CMD_SLOTS;
3017                 actual_slots = slots + 1;
3018         } else {
3019                 slots = TFD_TX_CMD_SLOTS;
3020                 actual_slots = slots;
3021         }
3022
3023         txq->meta =
3024             kcalloc(actual_slots, sizeof(struct il_cmd_meta), GFP_KERNEL);
3025         txq->cmd =
3026             kcalloc(actual_slots, sizeof(struct il_device_cmd *), GFP_KERNEL);
3027
3028         if (!txq->meta || !txq->cmd)
3029                 goto out_free_arrays;
3030
3031         len = sizeof(struct il_device_cmd);
3032         for (i = 0; i < actual_slots; i++) {
3033                 /* only happens for cmd queue */
3034                 if (i == slots)
3035                         len = IL_MAX_CMD_SIZE;
3036
3037                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3038                 if (!txq->cmd[i])
3039                         goto err;
3040         }
3041
3042         /* Alloc driver data array and TFD circular buffer */
3043         ret = il_tx_queue_alloc(il, txq, txq_id);
3044         if (ret)
3045                 goto err;
3046
3047         txq->need_update = 0;
3048
3049         /*
3050          * For the default queues 0-3, set up the swq_id
3051          * already -- all others need to get one later
3052          * (if they need one at all).
3053          */
3054         if (txq_id < 4)
3055                 il_set_swq_id(txq, txq_id, txq_id);
3056
3057         /* Initialize queue's high/low-water marks, and head/tail idxes */
3058         il_queue_init(il, &txq->q, slots, txq_id);
3059
3060         /* Tell device where to find queue */
3061         il->ops->txq_init(il, txq);
3062
3063         return 0;
3064 err:
3065         for (i = 0; i < actual_slots; i++)
3066                 kfree(txq->cmd[i]);
3067 out_free_arrays:
3068         kfree(txq->meta);
3069         txq->meta = NULL;
3070         kfree(txq->cmd);
3071         txq->cmd = NULL;
3072
3073         return -ENOMEM;
3074 }
3075 EXPORT_SYMBOL(il_tx_queue_init);
3076
3077 void
3078 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3079 {
3080         int slots, actual_slots;
3081         struct il_tx_queue *txq = &il->txq[txq_id];
3082
3083         if (txq_id == il->cmd_queue) {
3084                 slots = TFD_CMD_SLOTS;
3085                 actual_slots = TFD_CMD_SLOTS + 1;
3086         } else {
3087                 slots = TFD_TX_CMD_SLOTS;
3088                 actual_slots = TFD_TX_CMD_SLOTS;
3089         }
3090
3091         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3092         txq->need_update = 0;
3093
3094         /* Initialize queue's high/low-water marks, and head/tail idxes */
3095         il_queue_init(il, &txq->q, slots, txq_id);
3096
3097         /* Tell device where to find queue */
3098         il->ops->txq_init(il, txq);
3099 }
3100 EXPORT_SYMBOL(il_tx_queue_reset);
3101
3102 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3103
3104 /*
3105  * il_enqueue_hcmd - enqueue a uCode command
3106  * @il: device ilate data point
3107  * @cmd: a point to the ucode command structure
3108  *
3109  * The function returns < 0 values to indicate the operation is
3110  * failed. On success, it turns the idx (> 0) of command in the
3111  * command queue.
3112  */
3113 int
3114 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3115 {
3116         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3117         struct il_queue *q = &txq->q;
3118         struct il_device_cmd *out_cmd;
3119         struct il_cmd_meta *out_meta;
3120         dma_addr_t phys_addr;
3121         unsigned long flags;
3122         u32 idx;
3123         u16 fix_size;
3124
3125         cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3126         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3127
3128         /* If any of the command structures end up being larger than
3129          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3130          * we will need to increase the size of the TFD entries
3131          * Also, check to see if command buffer should not exceed the size
3132          * of device_cmd and max_cmd_size. */
3133         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3134                !(cmd->flags & CMD_SIZE_HUGE));
3135         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3136
3137         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3138                 IL_WARN("Not sending command - %s KILL\n",
3139                         il_is_rfkill(il) ? "RF" : "CT");
3140                 return -EIO;
3141         }
3142
3143         spin_lock_irqsave(&il->hcmd_lock, flags);
3144
3145         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3146                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3147
3148                 IL_ERR("Restarting adapter due to command queue full\n");
3149                 queue_work(il->workqueue, &il->restart);
3150                 return -ENOSPC;
3151         }
3152
3153         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3154         out_cmd = txq->cmd[idx];
3155         out_meta = &txq->meta[idx];
3156
3157         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3158                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3159                 return -ENOSPC;
3160         }
3161
3162         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3163         out_meta->flags = cmd->flags | CMD_MAPPED;
3164         if (cmd->flags & CMD_WANT_SKB)
3165                 out_meta->source = cmd;
3166         if (cmd->flags & CMD_ASYNC)
3167                 out_meta->callback = cmd->callback;
3168
3169         out_cmd->hdr.cmd = cmd->id;
3170         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3171
3172         /* At this point, the out_cmd now has all of the incoming cmd
3173          * information */
3174
3175         out_cmd->hdr.flags = 0;
3176         out_cmd->hdr.sequence =
3177             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3178         if (cmd->flags & CMD_SIZE_HUGE)
3179                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3180
3181 #ifdef CONFIG_IWLEGACY_DEBUG
3182         switch (out_cmd->hdr.cmd) {
3183         case C_TX_LINK_QUALITY_CMD:
3184         case C_SENSITIVITY:
3185                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3186                           "%d bytes at %d[%d]:%d\n",
3187                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3188                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3189                           q->write_ptr, idx, il->cmd_queue);
3190                 break;
3191         default:
3192                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3193                      "%d bytes at %d[%d]:%d\n",
3194                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3195                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3196                      idx, il->cmd_queue);
3197         }
3198 #endif
3199
3200         phys_addr = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, fix_size,
3201                                    DMA_BIDIRECTIONAL);
3202         if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr))) {
3203                 idx = -ENOMEM;
3204                 goto out;
3205         }
3206         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3207         dma_unmap_len_set(out_meta, len, fix_size);
3208
3209         txq->need_update = 1;
3210
3211         if (il->ops->txq_update_byte_cnt_tbl)
3212                 /* Set up entry in queue's byte count circular buffer */
3213                 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3214
3215         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3216                                             U32_PAD(cmd->len));
3217
3218         /* Increment and update queue's write idx */
3219         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3220         il_txq_update_write_ptr(il, txq);
3221
3222 out:
3223         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3224         return idx;
3225 }
3226
3227 /*
3228  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3229  *
3230  * When FW advances 'R' idx, all entries between old and new 'R' idx
3231  * need to be reclaimed. As result, some free space forms.  If there is
3232  * enough free space (> low mark), wake the stack that feeds us.
3233  */
3234 static void
3235 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3236 {
3237         struct il_tx_queue *txq = &il->txq[txq_id];
3238         struct il_queue *q = &txq->q;
3239         int nfreed = 0;
3240
3241         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3242                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3243                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3244                        q->write_ptr, q->read_ptr);
3245                 return;
3246         }
3247
3248         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3249              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3250
3251                 if (nfreed++ > 0) {
3252                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3253                                q->write_ptr, q->read_ptr);
3254                         queue_work(il->workqueue, &il->restart);
3255                 }
3256
3257         }
3258 }
3259
3260 /*
3261  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3262  * @rxb: Rx buffer to reclaim
3263  *
3264  * If an Rx buffer has an async callback associated with it the callback
3265  * will be executed.  The attached skb (if present) will only be freed
3266  * if the callback returns 1
3267  */
3268 void
3269 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3270 {
3271         struct il_rx_pkt *pkt = rxb_addr(rxb);
3272         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3273         int txq_id = SEQ_TO_QUEUE(sequence);
3274         int idx = SEQ_TO_IDX(sequence);
3275         int cmd_idx;
3276         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3277         struct il_device_cmd *cmd;
3278         struct il_cmd_meta *meta;
3279         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3280         unsigned long flags;
3281
3282         /* If a Tx command is being handled and it isn't in the actual
3283          * command queue then there a command routing bug has been introduced
3284          * in the queue management code. */
3285         if (WARN
3286             (txq_id != il->cmd_queue,
3287              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3288              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3289              il->txq[il->cmd_queue].q.write_ptr)) {
3290                 il_print_hex_error(il, pkt, 32);
3291                 return;
3292         }
3293
3294         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3295         cmd = txq->cmd[cmd_idx];
3296         meta = &txq->meta[cmd_idx];
3297
3298         txq->time_stamp = jiffies;
3299
3300         dma_unmap_single(&il->pci_dev->dev, dma_unmap_addr(meta, mapping),
3301                          dma_unmap_len(meta, len), DMA_BIDIRECTIONAL);
3302
3303         /* Input error checking is done when commands are added to queue. */
3304         if (meta->flags & CMD_WANT_SKB) {
3305                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3306                 rxb->page = NULL;
3307         } else if (meta->callback)
3308                 meta->callback(il, cmd, pkt);
3309
3310         spin_lock_irqsave(&il->hcmd_lock, flags);
3311
3312         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3313
3314         if (!(meta->flags & CMD_ASYNC)) {
3315                 clear_bit(S_HCMD_ACTIVE, &il->status);
3316                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3317                        il_get_cmd_string(cmd->hdr.cmd));
3318                 wake_up(&il->wait_command_queue);
3319         }
3320
3321         /* Mark as unmapped */
3322         meta->flags = 0;
3323
3324         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3325 }
3326 EXPORT_SYMBOL(il_tx_cmd_complete);
3327
3328 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3329 MODULE_VERSION(IWLWIFI_VERSION);
3330 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3331 MODULE_LICENSE("GPL");
3332
3333 /*
3334  * set bt_coex_active to true, uCode will do kill/defer
3335  * every time the priority line is asserted (BT is sending signals on the
3336  * priority line in the PCIx).
3337  * set bt_coex_active to false, uCode will ignore the BT activity and
3338  * perform the normal operation
3339  *
3340  * User might experience transmit issue on some platform due to WiFi/BT
3341  * co-exist problem. The possible behaviors are:
3342  *   Able to scan and finding all the available AP
3343  *   Not able to associate with any AP
3344  * On those platforms, WiFi communication can be restored by set
3345  * "bt_coex_active" module parameter to "false"
3346  *
3347  * default: bt_coex_active = true (BT_COEX_ENABLE)
3348  */
3349 static bool bt_coex_active = true;
3350 module_param(bt_coex_active, bool, 0444);
3351 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3352
3353 u32 il_debug_level;
3354 EXPORT_SYMBOL(il_debug_level);
3355
3356 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3357 EXPORT_SYMBOL(il_bcast_addr);
3358
3359 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3360 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3361 static void
3362 il_init_ht_hw_capab(const struct il_priv *il,
3363                     struct ieee80211_sta_ht_cap *ht_info,
3364                     enum nl80211_band band)
3365 {
3366         u16 max_bit_rate = 0;
3367         u8 rx_chains_num = il->hw_params.rx_chains_num;
3368         u8 tx_chains_num = il->hw_params.tx_chains_num;
3369
3370         ht_info->cap = 0;
3371         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3372
3373         ht_info->ht_supported = true;
3374
3375         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3376         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3377         if (il->hw_params.ht40_channel & BIT(band)) {
3378                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3379                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3380                 ht_info->mcs.rx_mask[4] = 0x01;
3381                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3382         }
3383
3384         if (il->cfg->mod_params->amsdu_size_8K)
3385                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3386
3387         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3388         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3389
3390         ht_info->mcs.rx_mask[0] = 0xFF;
3391         if (rx_chains_num >= 2)
3392                 ht_info->mcs.rx_mask[1] = 0xFF;
3393         if (rx_chains_num >= 3)
3394                 ht_info->mcs.rx_mask[2] = 0xFF;
3395
3396         /* Highest supported Rx data rate */
3397         max_bit_rate *= rx_chains_num;
3398         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3399         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3400
3401         /* Tx MCS capabilities */
3402         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3403         if (tx_chains_num != rx_chains_num) {
3404                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3405                 ht_info->mcs.tx_params |=
3406                     ((tx_chains_num -
3407                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3408         }
3409 }
3410
3411 /*
3412  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3413  */
3414 int
3415 il_init_geos(struct il_priv *il)
3416 {
3417         struct il_channel_info *ch;
3418         struct ieee80211_supported_band *sband;
3419         struct ieee80211_channel *channels;
3420         struct ieee80211_channel *geo_ch;
3421         struct ieee80211_rate *rates;
3422         int i = 0;
3423         s8 max_tx_power = 0;
3424
3425         if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3426             il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3427                 D_INFO("Geography modes already initialized.\n");
3428                 set_bit(S_GEO_CONFIGURED, &il->status);
3429                 return 0;
3430         }
3431
3432         channels =
3433             kcalloc(il->channel_count, sizeof(struct ieee80211_channel),
3434                     GFP_KERNEL);
3435         if (!channels)
3436                 return -ENOMEM;
3437
3438         rates =
3439             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3440                     GFP_KERNEL);
3441         if (!rates) {
3442                 kfree(channels);
3443                 return -ENOMEM;
3444         }
3445
3446         /* 5.2GHz channels start after the 2.4GHz channels */
3447         sband = &il->bands[NL80211_BAND_5GHZ];
3448         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3449         /* just OFDM */
3450         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3451         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3452
3453         if (il->cfg->sku & IL_SKU_N)
3454                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3455
3456         sband = &il->bands[NL80211_BAND_2GHZ];
3457         sband->channels = channels;
3458         /* OFDM & CCK */
3459         sband->bitrates = rates;
3460         sband->n_bitrates = RATE_COUNT_LEGACY;
3461
3462         if (il->cfg->sku & IL_SKU_N)
3463                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3464
3465         il->ieee_channels = channels;
3466         il->ieee_rates = rates;
3467
3468         for (i = 0; i < il->channel_count; i++) {
3469                 ch = &il->channel_info[i];
3470
3471                 if (!il_is_channel_valid(ch))
3472                         continue;
3473
3474                 sband = &il->bands[ch->band];
3475
3476                 geo_ch = &sband->channels[sband->n_channels++];
3477
3478                 geo_ch->center_freq =
3479                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3480                 geo_ch->max_power = ch->max_power_avg;
3481                 geo_ch->max_antenna_gain = 0xff;
3482                 geo_ch->hw_value = ch->channel;
3483
3484                 if (il_is_channel_valid(ch)) {
3485                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3486                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3487
3488                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3489                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3490
3491                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3492                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3493
3494                         geo_ch->flags |= ch->ht40_extension_channel;
3495
3496                         if (ch->max_power_avg > max_tx_power)
3497                                 max_tx_power = ch->max_power_avg;
3498                 } else {
3499                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3500                 }
3501
3502                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3503                        geo_ch->center_freq,
3504                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3505                        geo_ch->
3506                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3507                        geo_ch->flags);
3508         }
3509
3510         il->tx_power_device_lmt = max_tx_power;
3511         il->tx_power_user_lmt = max_tx_power;
3512         il->tx_power_next = max_tx_power;
3513
3514         if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3515             (il->cfg->sku & IL_SKU_A)) {
3516                 IL_INFO("Incorrectly detected BG card as ABG. "
3517                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3518                         il->pci_dev->device, il->pci_dev->subsystem_device);
3519                 il->cfg->sku &= ~IL_SKU_A;
3520         }
3521
3522         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3523                 il->bands[NL80211_BAND_2GHZ].n_channels,
3524                 il->bands[NL80211_BAND_5GHZ].n_channels);
3525
3526         set_bit(S_GEO_CONFIGURED, &il->status);
3527
3528         return 0;
3529 }
3530 EXPORT_SYMBOL(il_init_geos);
3531
3532 /*
3533  * il_free_geos - undo allocations in il_init_geos
3534  */
3535 void
3536 il_free_geos(struct il_priv *il)
3537 {
3538         kfree(il->ieee_channels);
3539         kfree(il->ieee_rates);
3540         clear_bit(S_GEO_CONFIGURED, &il->status);
3541 }
3542 EXPORT_SYMBOL(il_free_geos);
3543
3544 static bool
3545 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3546                         u16 channel, u8 extension_chan_offset)
3547 {
3548         const struct il_channel_info *ch_info;
3549
3550         ch_info = il_get_channel_info(il, band, channel);
3551         if (!il_is_channel_valid(ch_info))
3552                 return false;
3553
3554         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3555                 return !(ch_info->
3556                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3557         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3558                 return !(ch_info->
3559                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3560
3561         return false;
3562 }
3563
3564 bool
3565 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3566 {
3567         if (!il->ht.enabled || !il->ht.is_40mhz)
3568                 return false;
3569
3570         /*
3571          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3572          * the bit will not set if it is pure 40MHz case
3573          */
3574         if (ht_cap && !ht_cap->ht_supported)
3575                 return false;
3576
3577 #ifdef CONFIG_IWLEGACY_DEBUGFS
3578         if (il->disable_ht40)
3579                 return false;
3580 #endif
3581
3582         return il_is_channel_extension(il, il->band,
3583                                        le16_to_cpu(il->staging.channel),
3584                                        il->ht.extension_chan_offset);
3585 }
3586 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3587
3588 static u16 noinline
3589 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3590 {
3591         u16 new_val;
3592         u16 beacon_factor;
3593
3594         /*
3595          * If mac80211 hasn't given us a beacon interval, program
3596          * the default into the device.
3597          */
3598         if (!beacon_val)
3599                 return DEFAULT_BEACON_INTERVAL;
3600
3601         /*
3602          * If the beacon interval we obtained from the peer
3603          * is too large, we'll have to wake up more often
3604          * (and in IBSS case, we'll beacon too much)
3605          *
3606          * For example, if max_beacon_val is 4096, and the
3607          * requested beacon interval is 7000, we'll have to
3608          * use 3500 to be able to wake up on the beacons.
3609          *
3610          * This could badly influence beacon detection stats.
3611          */
3612
3613         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3614         new_val = beacon_val / beacon_factor;
3615
3616         if (!new_val)
3617                 new_val = max_beacon_val;
3618
3619         return new_val;
3620 }
3621
3622 int
3623 il_send_rxon_timing(struct il_priv *il)
3624 {
3625         u64 tsf;
3626         s32 interval_tm, rem;
3627         struct ieee80211_conf *conf = NULL;
3628         u16 beacon_int;
3629         struct ieee80211_vif *vif = il->vif;
3630
3631         conf = &il->hw->conf;
3632
3633         lockdep_assert_held(&il->mutex);
3634
3635         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3636
3637         il->timing.timestamp = cpu_to_le64(il->timestamp);
3638         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3639
3640         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3641
3642         /*
3643          * TODO: For IBSS we need to get atim_win from mac80211,
3644          *       for now just always use 0
3645          */
3646         il->timing.atim_win = 0;
3647
3648         beacon_int =
3649             il_adjust_beacon_interval(beacon_int,
3650                                       il->hw_params.max_beacon_itrvl *
3651                                       TIME_UNIT);
3652         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3653
3654         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3655         interval_tm = beacon_int * TIME_UNIT;
3656         rem = do_div(tsf, interval_tm);
3657         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3658
3659         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3660
3661         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3662                 le16_to_cpu(il->timing.beacon_interval),
3663                 le32_to_cpu(il->timing.beacon_init_val),
3664                 le16_to_cpu(il->timing.atim_win));
3665
3666         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3667                                &il->timing);
3668 }
3669 EXPORT_SYMBOL(il_send_rxon_timing);
3670
3671 void
3672 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3673 {
3674         struct il_rxon_cmd *rxon = &il->staging;
3675
3676         if (hw_decrypt)
3677                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3678         else
3679                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3680
3681 }
3682 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3683
3684 /* validate RXON structure is valid */
3685 int
3686 il_check_rxon_cmd(struct il_priv *il)
3687 {
3688         struct il_rxon_cmd *rxon = &il->staging;
3689         bool error = false;
3690
3691         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3692                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3693                         IL_WARN("check 2.4G: wrong narrow\n");
3694                         error = true;
3695                 }
3696                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3697                         IL_WARN("check 2.4G: wrong radar\n");
3698                         error = true;
3699                 }
3700         } else {
3701                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3702                         IL_WARN("check 5.2G: not short slot!\n");
3703                         error = true;
3704                 }
3705                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3706                         IL_WARN("check 5.2G: CCK!\n");
3707                         error = true;
3708                 }
3709         }
3710         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3711                 IL_WARN("mac/bssid mcast!\n");
3712                 error = true;
3713         }
3714
3715         /* make sure basic rates 6Mbps and 1Mbps are supported */
3716         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3717             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3718                 IL_WARN("neither 1 nor 6 are basic\n");
3719                 error = true;
3720         }
3721
3722         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3723                 IL_WARN("aid > 2007\n");
3724                 error = true;
3725         }
3726
3727         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3728             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3729                 IL_WARN("CCK and short slot\n");
3730                 error = true;
3731         }
3732
3733         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3734             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3735                 IL_WARN("CCK and auto detect");
3736                 error = true;
3737         }
3738
3739         if ((rxon->
3740              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3741             RXON_FLG_TGG_PROTECT_MSK) {
3742                 IL_WARN("TGg but no auto-detect\n");
3743                 error = true;
3744         }
3745
3746         if (error)
3747                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3748
3749         if (error) {
3750                 IL_ERR("Invalid RXON\n");
3751                 return -EINVAL;
3752         }
3753         return 0;
3754 }
3755 EXPORT_SYMBOL(il_check_rxon_cmd);
3756
3757 /*
3758  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3759  * @il: staging_rxon is compared to active_rxon
3760  *
3761  * If the RXON structure is changing enough to require a new tune,
3762  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3763  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3764  */
3765 int
3766 il_full_rxon_required(struct il_priv *il)
3767 {
3768         const struct il_rxon_cmd *staging = &il->staging;
3769         const struct il_rxon_cmd *active = &il->active;
3770
3771 #define CHK(cond)                                                       \
3772         if ((cond)) {                                                   \
3773                 D_INFO("need full RXON - " #cond "\n"); \
3774                 return 1;                                               \
3775         }
3776
3777 #define CHK_NEQ(c1, c2)                                         \
3778         if ((c1) != (c2)) {                                     \
3779                 D_INFO("need full RXON - "      \
3780                                #c1 " != " #c2 " - %d != %d\n",  \
3781                                (c1), (c2));                     \
3782                 return 1;                                       \
3783         }
3784
3785         /* These items are only settable from the full RXON command */
3786         CHK(!il_is_associated(il));
3787         CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3788         CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3789         CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3790                                      active->wlap_bssid_addr));
3791         CHK_NEQ(staging->dev_type, active->dev_type);
3792         CHK_NEQ(staging->channel, active->channel);
3793         CHK_NEQ(staging->air_propagation, active->air_propagation);
3794         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3795                 active->ofdm_ht_single_stream_basic_rates);
3796         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3797                 active->ofdm_ht_dual_stream_basic_rates);
3798         CHK_NEQ(staging->assoc_id, active->assoc_id);
3799
3800         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3801          * be updated with the RXON_ASSOC command -- however only some
3802          * flag transitions are allowed using RXON_ASSOC */
3803
3804         /* Check if we are not switching bands */
3805         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3806                 active->flags & RXON_FLG_BAND_24G_MSK);
3807
3808         /* Check if we are switching association toggle */
3809         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3810                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3811
3812 #undef CHK
3813 #undef CHK_NEQ
3814
3815         return 0;
3816 }
3817 EXPORT_SYMBOL(il_full_rxon_required);
3818
3819 u8
3820 il_get_lowest_plcp(struct il_priv *il)
3821 {
3822         /*
3823          * Assign the lowest rate -- should really get this from
3824          * the beacon skb from mac80211.
3825          */
3826         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3827                 return RATE_1M_PLCP;
3828         else
3829                 return RATE_6M_PLCP;
3830 }
3831 EXPORT_SYMBOL(il_get_lowest_plcp);
3832
3833 static void
3834 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3835 {
3836         struct il_rxon_cmd *rxon = &il->staging;
3837
3838         if (!il->ht.enabled) {
3839                 rxon->flags &=
3840                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3841                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3842                       | RXON_FLG_HT_PROT_MSK);
3843                 return;
3844         }
3845
3846         rxon->flags |=
3847             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3848
3849         /* Set up channel bandwidth:
3850          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3851         /* clear the HT channel mode before set the mode */
3852         rxon->flags &=
3853             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3854         if (il_is_ht40_tx_allowed(il, NULL)) {
3855                 /* pure ht40 */
3856                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3857                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3858                         /* Note: control channel is opposite of extension channel */
3859                         switch (il->ht.extension_chan_offset) {
3860                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3861                                 rxon->flags &=
3862                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3863                                 break;
3864                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3865                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3866                                 break;
3867                         }
3868                 } else {
3869                         /* Note: control channel is opposite of extension channel */
3870                         switch (il->ht.extension_chan_offset) {
3871                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3872                                 rxon->flags &=
3873                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3874                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3875                                 break;
3876                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3877                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3878                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3879                                 break;
3880                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3881                         default:
3882                                 /* channel location only valid if in Mixed mode */
3883                                 IL_ERR("invalid extension channel offset\n");
3884                                 break;
3885                         }
3886                 }
3887         } else {
3888                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3889         }
3890
3891         if (il->ops->set_rxon_chain)
3892                 il->ops->set_rxon_chain(il);
3893
3894         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3895                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3896                 il->ht.protection, il->ht.extension_chan_offset);
3897 }
3898
3899 void
3900 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3901 {
3902         _il_set_rxon_ht(il, ht_conf);
3903 }
3904 EXPORT_SYMBOL(il_set_rxon_ht);
3905
3906 /* Return valid, unused, channel for a passive scan to reset the RF */
3907 u8
3908 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3909 {
3910         const struct il_channel_info *ch_info;
3911         int i;
3912         u8 channel = 0;
3913         u8 min, max;
3914
3915         if (band == NL80211_BAND_5GHZ) {
3916                 min = 14;
3917                 max = il->channel_count;
3918         } else {
3919                 min = 0;
3920                 max = 14;
3921         }
3922
3923         for (i = min; i < max; i++) {
3924                 channel = il->channel_info[i].channel;
3925                 if (channel == le16_to_cpu(il->staging.channel))
3926                         continue;
3927
3928                 ch_info = il_get_channel_info(il, band, channel);
3929                 if (il_is_channel_valid(ch_info))
3930                         break;
3931         }
3932
3933         return channel;
3934 }
3935 EXPORT_SYMBOL(il_get_single_channel_number);
3936
3937 /*
3938  * il_set_rxon_channel - Set the band and channel values in staging RXON
3939  * @ch: requested channel as a pointer to struct ieee80211_channel
3940
3941  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3942  * in the staging RXON flag structure based on the ch->band
3943  */
3944 int
3945 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3946 {
3947         enum nl80211_band band = ch->band;
3948         u16 channel = ch->hw_value;
3949
3950         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3951                 return 0;
3952
3953         il->staging.channel = cpu_to_le16(channel);
3954         if (band == NL80211_BAND_5GHZ)
3955                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3956         else
3957                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3958
3959         il->band = band;
3960
3961         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3962
3963         return 0;
3964 }
3965 EXPORT_SYMBOL(il_set_rxon_channel);
3966
3967 void
3968 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3969                       struct ieee80211_vif *vif)
3970 {
3971         if (band == NL80211_BAND_5GHZ) {
3972                 il->staging.flags &=
3973                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3974                       RXON_FLG_CCK_MSK);
3975                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3976         } else {
3977                 /* Copied from il_post_associate() */
3978                 if (vif && vif->bss_conf.use_short_slot)
3979                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3980                 else
3981                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3982
3983                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3984                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3985                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3986         }
3987 }
3988 EXPORT_SYMBOL(il_set_flags_for_band);
3989
3990 /*
3991  * initialize rxon structure with default values from eeprom
3992  */
3993 void
3994 il_connection_init_rx_config(struct il_priv *il)
3995 {
3996         const struct il_channel_info *ch_info;
3997
3998         memset(&il->staging, 0, sizeof(il->staging));
3999
4000         switch (il->iw_mode) {
4001         case NL80211_IFTYPE_UNSPECIFIED:
4002                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4003                 break;
4004         case NL80211_IFTYPE_STATION:
4005                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4006                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4007                 break;
4008         case NL80211_IFTYPE_ADHOC:
4009                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4010                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4011                 il->staging.filter_flags =
4012                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4013                 break;
4014         default:
4015                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4016                 return;
4017         }
4018
4019 #if 0
4020         /* TODO:  Figure out when short_preamble would be set and cache from
4021          * that */
4022         if (!hw_to_local(il->hw)->short_preamble)
4023                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4024         else
4025                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4026 #endif
4027
4028         ch_info =
4029             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4030
4031         if (!ch_info)
4032                 ch_info = &il->channel_info[0];
4033
4034         il->staging.channel = cpu_to_le16(ch_info->channel);
4035         il->band = ch_info->band;
4036
4037         il_set_flags_for_band(il, il->band, il->vif);
4038
4039         il->staging.ofdm_basic_rates =
4040             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4041         il->staging.cck_basic_rates =
4042             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4043
4044         /* clear both MIX and PURE40 mode flag */
4045         il->staging.flags &=
4046             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4047         if (il->vif)
4048                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4049
4050         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4051         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4052 }
4053 EXPORT_SYMBOL(il_connection_init_rx_config);
4054
4055 void
4056 il_set_rate(struct il_priv *il)
4057 {
4058         const struct ieee80211_supported_band *hw = NULL;
4059         struct ieee80211_rate *rate;
4060         int i;
4061
4062         hw = il_get_hw_mode(il, il->band);
4063         if (!hw) {
4064                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4065                 return;
4066         }
4067
4068         il->active_rate = 0;
4069
4070         for (i = 0; i < hw->n_bitrates; i++) {
4071                 rate = &(hw->bitrates[i]);
4072                 if (rate->hw_value < RATE_COUNT_LEGACY)
4073                         il->active_rate |= (1 << rate->hw_value);
4074         }
4075
4076         D_RATE("Set active_rate = %0x\n", il->active_rate);
4077
4078         il->staging.cck_basic_rates =
4079             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4080
4081         il->staging.ofdm_basic_rates =
4082             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4083 }
4084 EXPORT_SYMBOL(il_set_rate);
4085
4086 void
4087 il_chswitch_done(struct il_priv *il, bool is_success)
4088 {
4089         if (test_bit(S_EXIT_PENDING, &il->status))
4090                 return;
4091
4092         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4093                 ieee80211_chswitch_done(il->vif, is_success);
4094 }
4095 EXPORT_SYMBOL(il_chswitch_done);
4096
4097 void
4098 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4099 {
4100         struct il_rx_pkt *pkt = rxb_addr(rxb);
4101         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4102         struct il_rxon_cmd *rxon = (void *)&il->active;
4103
4104         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4105                 return;
4106
4107         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4108                 rxon->channel = csa->channel;
4109                 il->staging.channel = csa->channel;
4110                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4111                 il_chswitch_done(il, true);
4112         } else {
4113                 IL_ERR("CSA notif (fail) : channel %d\n",
4114                        le16_to_cpu(csa->channel));
4115                 il_chswitch_done(il, false);
4116         }
4117 }
4118 EXPORT_SYMBOL(il_hdl_csa);
4119
4120 #ifdef CONFIG_IWLEGACY_DEBUG
4121 void
4122 il_print_rx_config_cmd(struct il_priv *il)
4123 {
4124         struct il_rxon_cmd *rxon = &il->staging;
4125
4126         D_RADIO("RX CONFIG:\n");
4127         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4128         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4129         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4130         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4131         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4132         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4133         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4134         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4135         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4136         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4137 }
4138 EXPORT_SYMBOL(il_print_rx_config_cmd);
4139 #endif
4140 /*
4141  * il_irq_handle_error - called for HW or SW error interrupt from card
4142  */
4143 void
4144 il_irq_handle_error(struct il_priv *il)
4145 {
4146         /* Set the FW error flag -- cleared on il_down */
4147         set_bit(S_FW_ERROR, &il->status);
4148
4149         /* Cancel currently queued command. */
4150         clear_bit(S_HCMD_ACTIVE, &il->status);
4151
4152         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4153
4154         il->ops->dump_nic_error_log(il);
4155         if (il->ops->dump_fh)
4156                 il->ops->dump_fh(il, NULL, false);
4157 #ifdef CONFIG_IWLEGACY_DEBUG
4158         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4159                 il_print_rx_config_cmd(il);
4160 #endif
4161
4162         wake_up(&il->wait_command_queue);
4163
4164         /* Keep the restart process from trying to send host
4165          * commands by clearing the INIT status bit */
4166         clear_bit(S_READY, &il->status);
4167
4168         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4169                 IL_DBG(IL_DL_FW_ERRORS,
4170                        "Restarting adapter due to uCode error.\n");
4171
4172                 if (il->cfg->mod_params->restart_fw)
4173                         queue_work(il->workqueue, &il->restart);
4174         }
4175 }
4176 EXPORT_SYMBOL(il_irq_handle_error);
4177
4178 static int
4179 _il_apm_stop_master(struct il_priv *il)
4180 {
4181         int ret = 0;
4182
4183         /* stop device's busmaster DMA activity */
4184         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4185
4186         ret =
4187             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4188                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4189         if (ret < 0)
4190                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4191
4192         D_INFO("stop master\n");
4193
4194         return ret;
4195 }
4196
4197 void
4198 _il_apm_stop(struct il_priv *il)
4199 {
4200         lockdep_assert_held(&il->reg_lock);
4201
4202         D_INFO("Stop card, put in low power state\n");
4203
4204         /* Stop device's DMA activity */
4205         _il_apm_stop_master(il);
4206
4207         /* Reset the entire device */
4208         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4209
4210         udelay(10);
4211
4212         /*
4213          * Clear "initialization complete" bit to move adapter from
4214          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4215          */
4216         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4217 }
4218 EXPORT_SYMBOL(_il_apm_stop);
4219
4220 void
4221 il_apm_stop(struct il_priv *il)
4222 {
4223         unsigned long flags;
4224
4225         spin_lock_irqsave(&il->reg_lock, flags);
4226         _il_apm_stop(il);
4227         spin_unlock_irqrestore(&il->reg_lock, flags);
4228 }
4229 EXPORT_SYMBOL(il_apm_stop);
4230
4231 /*
4232  * Start up NIC's basic functionality after it has been reset
4233  * (e.g. after platform boot, or shutdown via il_apm_stop())
4234  * NOTE:  This does not load uCode nor start the embedded processor
4235  */
4236 int
4237 il_apm_init(struct il_priv *il)
4238 {
4239         int ret = 0;
4240         u16 lctl;
4241
4242         D_INFO("Init card's basic functions\n");
4243
4244         /*
4245          * Use "set_bit" below rather than "write", to preserve any hardware
4246          * bits already set by default after reset.
4247          */
4248
4249         /* Disable L0S exit timer (platform NMI Work/Around) */
4250         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4251                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4252
4253         /*
4254          * Disable L0s without affecting L1;
4255          *  don't wait for ICH L0s (ICH bug W/A)
4256          */
4257         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4258                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4259
4260         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4261         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4262
4263         /*
4264          * Enable HAP INTA (interrupt from management bus) to
4265          * wake device's PCI Express link L1a -> L0s
4266          * NOTE:  This is no-op for 3945 (non-existent bit)
4267          */
4268         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4269                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4270
4271         /*
4272          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4273          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4274          * If so (likely), disable L0S, so device moves directly L0->L1;
4275          *    costs negligible amount of power savings.
4276          * If not (unlikely), enable L0S, so there is at least some
4277          *    power savings, even without L1.
4278          */
4279         if (il->cfg->set_l0s) {
4280                 ret = pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4281                 if (!ret && (lctl & PCI_EXP_LNKCTL_ASPM_L1)) {
4282                         /* L1-ASPM enabled; disable(!) L0S  */
4283                         il_set_bit(il, CSR_GIO_REG,
4284                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4285                         D_POWER("L1 Enabled; Disabling L0S\n");
4286                 } else {
4287                         /* L1-ASPM disabled; enable(!) L0S */
4288                         il_clear_bit(il, CSR_GIO_REG,
4289                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4290                         D_POWER("L1 Disabled; Enabling L0S\n");
4291                 }
4292         }
4293
4294         /* Configure analog phase-lock-loop before activating to D0A */
4295         if (il->cfg->pll_cfg_val)
4296                 il_set_bit(il, CSR_ANA_PLL_CFG,
4297                            il->cfg->pll_cfg_val);
4298
4299         /*
4300          * Set "initialization complete" bit to move adapter from
4301          * D0U* --> D0A* (powered-up active) state.
4302          */
4303         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4304
4305         /*
4306          * Wait for clock stabilization; once stabilized, access to
4307          * device-internal resources is supported, e.g. il_wr_prph()
4308          * and accesses to uCode SRAM.
4309          */
4310         ret =
4311             _il_poll_bit(il, CSR_GP_CNTRL,
4312                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4313                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4314         if (ret < 0) {
4315                 D_INFO("Failed to init the card\n");
4316                 goto out;
4317         }
4318
4319         /*
4320          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4321          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4322          *
4323          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4324          * do not disable clocks.  This preserves any hardware bits already
4325          * set by default in "CLK_CTRL_REG" after reset.
4326          */
4327         if (il->cfg->use_bsm)
4328                 il_wr_prph(il, APMG_CLK_EN_REG,
4329                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4330         else
4331                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4332         udelay(20);
4333
4334         /* Disable L1-Active */
4335         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4336                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4337
4338 out:
4339         return ret;
4340 }
4341 EXPORT_SYMBOL(il_apm_init);
4342
4343 int
4344 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4345 {
4346         int ret;
4347         s8 prev_tx_power;
4348         bool defer;
4349
4350         lockdep_assert_held(&il->mutex);
4351
4352         if (il->tx_power_user_lmt == tx_power && !force)
4353                 return 0;
4354
4355         if (!il->ops->send_tx_power)
4356                 return -EOPNOTSUPP;
4357
4358         /* 0 dBm mean 1 milliwatt */
4359         if (tx_power < 0) {
4360                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4361                 return -EINVAL;
4362         }
4363
4364         if (tx_power > il->tx_power_device_lmt) {
4365                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4366                         tx_power, il->tx_power_device_lmt);
4367                 return -EINVAL;
4368         }
4369
4370         if (!il_is_ready_rf(il))
4371                 return -EIO;
4372
4373         /* scan complete and commit_rxon use tx_power_next value,
4374          * it always need to be updated for newest request */
4375         il->tx_power_next = tx_power;
4376
4377         /* do not set tx power when scanning or channel changing */
4378         defer = test_bit(S_SCANNING, &il->status) ||
4379             memcmp(&il->active, &il->staging, sizeof(il->staging));
4380         if (defer && !force) {
4381                 D_INFO("Deferring tx power set\n");
4382                 return 0;
4383         }
4384
4385         prev_tx_power = il->tx_power_user_lmt;
4386         il->tx_power_user_lmt = tx_power;
4387
4388         ret = il->ops->send_tx_power(il);
4389
4390         /* if fail to set tx_power, restore the orig. tx power */
4391         if (ret) {
4392                 il->tx_power_user_lmt = prev_tx_power;
4393                 il->tx_power_next = prev_tx_power;
4394         }
4395         return ret;
4396 }
4397 EXPORT_SYMBOL(il_set_tx_power);
4398
4399 void
4400 il_send_bt_config(struct il_priv *il)
4401 {
4402         struct il_bt_cmd bt_cmd = {
4403                 .lead_time = BT_LEAD_TIME_DEF,
4404                 .max_kill = BT_MAX_KILL_DEF,
4405                 .kill_ack_mask = 0,
4406                 .kill_cts_mask = 0,
4407         };
4408
4409         if (!bt_coex_active)
4410                 bt_cmd.flags = BT_COEX_DISABLE;
4411         else
4412                 bt_cmd.flags = BT_COEX_ENABLE;
4413
4414         D_INFO("BT coex %s\n",
4415                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4416
4417         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4418                 IL_ERR("failed to send BT Coex Config\n");
4419 }
4420 EXPORT_SYMBOL(il_send_bt_config);
4421
4422 int
4423 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4424 {
4425         struct il_stats_cmd stats_cmd = {
4426                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4427         };
4428
4429         if (flags & CMD_ASYNC)
4430                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4431                                              &stats_cmd, NULL);
4432         else
4433                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4434                                        &stats_cmd);
4435 }
4436 EXPORT_SYMBOL(il_send_stats_request);
4437
4438 void
4439 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4440 {
4441 #ifdef CONFIG_IWLEGACY_DEBUG
4442         struct il_rx_pkt *pkt = rxb_addr(rxb);
4443         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4444         D_RX("sleep mode: %d, src: %d\n",
4445              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4446 #endif
4447 }
4448 EXPORT_SYMBOL(il_hdl_pm_sleep);
4449
4450 void
4451 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4452 {
4453         struct il_rx_pkt *pkt = rxb_addr(rxb);
4454         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4455         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4456                 il_get_cmd_string(pkt->hdr.cmd));
4457         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4458 }
4459 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4460
4461 void
4462 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4463 {
4464         struct il_rx_pkt *pkt = rxb_addr(rxb);
4465
4466         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4467                "seq 0x%04X ser 0x%08X\n",
4468                le32_to_cpu(pkt->u.err_resp.error_type),
4469                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4470                pkt->u.err_resp.cmd_id,
4471                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4472                le32_to_cpu(pkt->u.err_resp.error_info));
4473 }
4474 EXPORT_SYMBOL(il_hdl_error);
4475
4476 void
4477 il_clear_isr_stats(struct il_priv *il)
4478 {
4479         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4480 }
4481
4482 int
4483 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4484                const struct ieee80211_tx_queue_params *params)
4485 {
4486         struct il_priv *il = hw->priv;
4487         unsigned long flags;
4488         int q;
4489
4490         D_MAC80211("enter\n");
4491
4492         if (!il_is_ready_rf(il)) {
4493                 D_MAC80211("leave - RF not ready\n");
4494                 return -EIO;
4495         }
4496
4497         if (queue >= AC_NUM) {
4498                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4499                 return 0;
4500         }
4501
4502         q = AC_NUM - 1 - queue;
4503
4504         spin_lock_irqsave(&il->lock, flags);
4505
4506         il->qos_data.def_qos_parm.ac[q].cw_min =
4507             cpu_to_le16(params->cw_min);
4508         il->qos_data.def_qos_parm.ac[q].cw_max =
4509             cpu_to_le16(params->cw_max);
4510         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4511         il->qos_data.def_qos_parm.ac[q].edca_txop =
4512             cpu_to_le16((params->txop * 32));
4513
4514         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4515
4516         spin_unlock_irqrestore(&il->lock, flags);
4517
4518         D_MAC80211("leave\n");
4519         return 0;
4520 }
4521 EXPORT_SYMBOL(il_mac_conf_tx);
4522
4523 int
4524 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4525 {
4526         struct il_priv *il = hw->priv;
4527         int ret;
4528
4529         D_MAC80211("enter\n");
4530
4531         ret = (il->ibss_manager == IL_IBSS_MANAGER);
4532
4533         D_MAC80211("leave ret %d\n", ret);
4534         return ret;
4535 }
4536 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4537
4538 static int
4539 il_set_mode(struct il_priv *il)
4540 {
4541         il_connection_init_rx_config(il);
4542
4543         if (il->ops->set_rxon_chain)
4544                 il->ops->set_rxon_chain(il);
4545
4546         return il_commit_rxon(il);
4547 }
4548
4549 int
4550 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4551 {
4552         struct il_priv *il = hw->priv;
4553         int err;
4554         bool reset;
4555
4556         mutex_lock(&il->mutex);
4557         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4558
4559         if (!il_is_ready_rf(il)) {
4560                 IL_WARN("Try to add interface when device not ready\n");
4561                 err = -EINVAL;
4562                 goto out;
4563         }
4564
4565         /*
4566          * We do not support multiple virtual interfaces, but on hardware reset
4567          * we have to add the same interface again.
4568          */
4569         reset = (il->vif == vif);
4570         if (il->vif && !reset) {
4571                 err = -EOPNOTSUPP;
4572                 goto out;
4573         }
4574
4575         il->vif = vif;
4576         il->iw_mode = vif->type;
4577
4578         err = il_set_mode(il);
4579         if (err) {
4580                 IL_WARN("Fail to set mode %d\n", vif->type);
4581                 if (!reset) {
4582                         il->vif = NULL;
4583                         il->iw_mode = NL80211_IFTYPE_STATION;
4584                 }
4585         }
4586
4587 out:
4588         D_MAC80211("leave err %d\n", err);
4589         mutex_unlock(&il->mutex);
4590
4591         return err;
4592 }
4593 EXPORT_SYMBOL(il_mac_add_interface);
4594
4595 static void
4596 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4597 {
4598         lockdep_assert_held(&il->mutex);
4599
4600         if (il->scan_vif == vif) {
4601                 il_scan_cancel_timeout(il, 200);
4602                 il_force_scan_end(il);
4603         }
4604
4605         il_set_mode(il);
4606 }
4607
4608 void
4609 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4610 {
4611         struct il_priv *il = hw->priv;
4612
4613         mutex_lock(&il->mutex);
4614         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4615
4616         WARN_ON(il->vif != vif);
4617         il->vif = NULL;
4618         il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4619         il_teardown_interface(il, vif);
4620         eth_zero_addr(il->bssid);
4621
4622         D_MAC80211("leave\n");
4623         mutex_unlock(&il->mutex);
4624 }
4625 EXPORT_SYMBOL(il_mac_remove_interface);
4626
4627 int
4628 il_alloc_txq_mem(struct il_priv *il)
4629 {
4630         if (!il->txq)
4631                 il->txq =
4632                     kcalloc(il->cfg->num_of_queues,
4633                             sizeof(struct il_tx_queue),
4634                             GFP_KERNEL);
4635         if (!il->txq) {
4636                 IL_ERR("Not enough memory for txq\n");
4637                 return -ENOMEM;
4638         }
4639         return 0;
4640 }
4641 EXPORT_SYMBOL(il_alloc_txq_mem);
4642
4643 void
4644 il_free_txq_mem(struct il_priv *il)
4645 {
4646         kfree(il->txq);
4647         il->txq = NULL;
4648 }
4649 EXPORT_SYMBOL(il_free_txq_mem);
4650
4651 int
4652 il_force_reset(struct il_priv *il, bool external)
4653 {
4654         struct il_force_reset *force_reset;
4655
4656         if (test_bit(S_EXIT_PENDING, &il->status))
4657                 return -EINVAL;
4658
4659         force_reset = &il->force_reset;
4660         force_reset->reset_request_count++;
4661         if (!external) {
4662                 if (force_reset->last_force_reset_jiffies &&
4663                     time_after(force_reset->last_force_reset_jiffies +
4664                                force_reset->reset_duration, jiffies)) {
4665                         D_INFO("force reset rejected\n");
4666                         force_reset->reset_reject_count++;
4667                         return -EAGAIN;
4668                 }
4669         }
4670         force_reset->reset_success_count++;
4671         force_reset->last_force_reset_jiffies = jiffies;
4672
4673         /*
4674          * if the request is from external(ex: debugfs),
4675          * then always perform the request in regardless the module
4676          * parameter setting
4677          * if the request is from internal (uCode error or driver
4678          * detect failure), then fw_restart module parameter
4679          * need to be check before performing firmware reload
4680          */
4681
4682         if (!external && !il->cfg->mod_params->restart_fw) {
4683                 D_INFO("Cancel firmware reload based on "
4684                        "module parameter setting\n");
4685                 return 0;
4686         }
4687
4688         IL_ERR("On demand firmware reload\n");
4689
4690         /* Set the FW error flag -- cleared on il_down */
4691         set_bit(S_FW_ERROR, &il->status);
4692         wake_up(&il->wait_command_queue);
4693         /*
4694          * Keep the restart process from trying to send host
4695          * commands by clearing the INIT status bit
4696          */
4697         clear_bit(S_READY, &il->status);
4698         queue_work(il->workqueue, &il->restart);
4699
4700         return 0;
4701 }
4702 EXPORT_SYMBOL(il_force_reset);
4703
4704 int
4705 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4706                         enum nl80211_iftype newtype, bool newp2p)
4707 {
4708         struct il_priv *il = hw->priv;
4709         int err;
4710
4711         mutex_lock(&il->mutex);
4712         D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4713                     vif->type, vif->addr, newtype, newp2p);
4714
4715         if (newp2p) {
4716                 err = -EOPNOTSUPP;
4717                 goto out;
4718         }
4719
4720         if (!il->vif || !il_is_ready_rf(il)) {
4721                 /*
4722                  * Huh? But wait ... this can maybe happen when
4723                  * we're in the middle of a firmware restart!
4724                  */
4725                 err = -EBUSY;
4726                 goto out;
4727         }
4728
4729         /* success */
4730         vif->type = newtype;
4731         vif->p2p = false;
4732         il->iw_mode = newtype;
4733         il_teardown_interface(il, vif);
4734         err = 0;
4735
4736 out:
4737         D_MAC80211("leave err %d\n", err);
4738         mutex_unlock(&il->mutex);
4739
4740         return err;
4741 }
4742 EXPORT_SYMBOL(il_mac_change_interface);
4743
4744 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4745                   u32 queues, bool drop)
4746 {
4747         struct il_priv *il = hw->priv;
4748         unsigned long timeout = jiffies + msecs_to_jiffies(500);
4749         int i;
4750
4751         mutex_lock(&il->mutex);
4752         D_MAC80211("enter\n");
4753
4754         if (il->txq == NULL)
4755                 goto out;
4756
4757         for (i = 0; i < il->hw_params.max_txq_num; i++) {
4758                 struct il_queue *q;
4759
4760                 if (i == il->cmd_queue)
4761                         continue;
4762
4763                 q = &il->txq[i].q;
4764                 if (q->read_ptr == q->write_ptr)
4765                         continue;
4766
4767                 if (time_after(jiffies, timeout)) {
4768                         IL_ERR("Failed to flush queue %d\n", q->id);
4769                         break;
4770                 }
4771
4772                 msleep(20);
4773         }
4774 out:
4775         D_MAC80211("leave\n");
4776         mutex_unlock(&il->mutex);
4777 }
4778 EXPORT_SYMBOL(il_mac_flush);
4779
4780 /*
4781  * On every watchdog tick we check (latest) time stamp. If it does not
4782  * change during timeout period and queue is not empty we reset firmware.
4783  */
4784 static int
4785 il_check_stuck_queue(struct il_priv *il, int cnt)
4786 {
4787         struct il_tx_queue *txq = &il->txq[cnt];
4788         struct il_queue *q = &txq->q;
4789         unsigned long timeout;
4790         unsigned long now = jiffies;
4791         int ret;
4792
4793         if (q->read_ptr == q->write_ptr) {
4794                 txq->time_stamp = now;
4795                 return 0;
4796         }
4797
4798         timeout =
4799             txq->time_stamp +
4800             msecs_to_jiffies(il->cfg->wd_timeout);
4801
4802         if (time_after(now, timeout)) {
4803                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4804                        jiffies_to_msecs(now - txq->time_stamp));
4805                 ret = il_force_reset(il, false);
4806                 return (ret == -EAGAIN) ? 0 : 1;
4807         }
4808
4809         return 0;
4810 }
4811
4812 /*
4813  * Making watchdog tick be a quarter of timeout assure we will
4814  * discover the queue hung between timeout and 1.25*timeout
4815  */
4816 #define IL_WD_TICK(timeout) ((timeout) / 4)
4817
4818 /*
4819  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4820  * we reset the firmware. If everything is fine just rearm the timer.
4821  */
4822 void
4823 il_bg_watchdog(struct timer_list *t)
4824 {
4825         struct il_priv *il = from_timer(il, t, watchdog);
4826         int cnt;
4827         unsigned long timeout;
4828
4829         if (test_bit(S_EXIT_PENDING, &il->status))
4830                 return;
4831
4832         timeout = il->cfg->wd_timeout;
4833         if (timeout == 0)
4834                 return;
4835
4836         /* monitor and check for stuck cmd queue */
4837         if (il_check_stuck_queue(il, il->cmd_queue))
4838                 return;
4839
4840         /* monitor and check for other stuck queues */
4841         for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4842                 /* skip as we already checked the command queue */
4843                 if (cnt == il->cmd_queue)
4844                         continue;
4845                 if (il_check_stuck_queue(il, cnt))
4846                         return;
4847         }
4848
4849         mod_timer(&il->watchdog,
4850                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4851 }
4852 EXPORT_SYMBOL(il_bg_watchdog);
4853
4854 void
4855 il_setup_watchdog(struct il_priv *il)
4856 {
4857         unsigned int timeout = il->cfg->wd_timeout;
4858
4859         if (timeout)
4860                 mod_timer(&il->watchdog,
4861                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4862         else
4863                 del_timer(&il->watchdog);
4864 }
4865 EXPORT_SYMBOL(il_setup_watchdog);
4866
4867 /*
4868  * extended beacon time format
4869  * time in usec will be changed into a 32-bit value in extended:internal format
4870  * the extended part is the beacon counts
4871  * the internal part is the time in usec within one beacon interval
4872  */
4873 u32
4874 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4875 {
4876         u32 quot;
4877         u32 rem;
4878         u32 interval = beacon_interval * TIME_UNIT;
4879
4880         if (!interval || !usec)
4881                 return 0;
4882
4883         quot =
4884             (usec /
4885              interval) & (il_beacon_time_mask_high(il,
4886                                                    il->hw_params.
4887                                                    beacon_time_tsf_bits) >> il->
4888                           hw_params.beacon_time_tsf_bits);
4889         rem =
4890             (usec % interval) & il_beacon_time_mask_low(il,
4891                                                         il->hw_params.
4892                                                         beacon_time_tsf_bits);
4893
4894         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4895 }
4896 EXPORT_SYMBOL(il_usecs_to_beacons);
4897
4898 /* base is usually what we get from ucode with each received frame,
4899  * the same as HW timer counter counting down
4900  */
4901 __le32
4902 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4903                    u32 beacon_interval)
4904 {
4905         u32 base_low = base & il_beacon_time_mask_low(il,
4906                                                       il->hw_params.
4907                                                       beacon_time_tsf_bits);
4908         u32 addon_low = addon & il_beacon_time_mask_low(il,
4909                                                         il->hw_params.
4910                                                         beacon_time_tsf_bits);
4911         u32 interval = beacon_interval * TIME_UNIT;
4912         u32 res = (base & il_beacon_time_mask_high(il,
4913                                                    il->hw_params.
4914                                                    beacon_time_tsf_bits)) +
4915             (addon & il_beacon_time_mask_high(il,
4916                                               il->hw_params.
4917                                               beacon_time_tsf_bits));
4918
4919         if (base_low > addon_low)
4920                 res += base_low - addon_low;
4921         else if (base_low < addon_low) {
4922                 res += interval + base_low - addon_low;
4923                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4924         } else
4925                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4926
4927         return cpu_to_le32(res);
4928 }
4929 EXPORT_SYMBOL(il_add_beacon_time);
4930
4931 #ifdef CONFIG_PM_SLEEP
4932
4933 static int
4934 il_pci_suspend(struct device *device)
4935 {
4936         struct il_priv *il = dev_get_drvdata(device);
4937
4938         /*
4939          * This function is called when system goes into suspend state
4940          * mac80211 will call il_mac_stop() from the mac80211 suspend function
4941          * first but since il_mac_stop() has no knowledge of who the caller is,
4942          * it will not call apm_ops.stop() to stop the DMA operation.
4943          * Calling apm_ops.stop here to make sure we stop the DMA.
4944          */
4945         il_apm_stop(il);
4946
4947         return 0;
4948 }
4949
4950 static int
4951 il_pci_resume(struct device *device)
4952 {
4953         struct pci_dev *pdev = to_pci_dev(device);
4954         struct il_priv *il = pci_get_drvdata(pdev);
4955         bool hw_rfkill = false;
4956
4957         /*
4958          * We disable the RETRY_TIMEOUT register (0x41) to keep
4959          * PCI Tx retries from interfering with C3 CPU state.
4960          */
4961         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4962
4963         il_enable_interrupts(il);
4964
4965         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4966                 hw_rfkill = true;
4967
4968         if (hw_rfkill)
4969                 set_bit(S_RFKILL, &il->status);
4970         else
4971                 clear_bit(S_RFKILL, &il->status);
4972
4973         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4974
4975         return 0;
4976 }
4977
4978 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4979 EXPORT_SYMBOL(il_pm_ops);
4980
4981 #endif /* CONFIG_PM_SLEEP */
4982
4983 static void
4984 il_update_qos(struct il_priv *il)
4985 {
4986         if (test_bit(S_EXIT_PENDING, &il->status))
4987                 return;
4988
4989         il->qos_data.def_qos_parm.qos_flags = 0;
4990
4991         if (il->qos_data.qos_active)
4992                 il->qos_data.def_qos_parm.qos_flags |=
4993                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
4994
4995         if (il->ht.enabled)
4996                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
4997
4998         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
4999               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5000
5001         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5002                               &il->qos_data.def_qos_parm, NULL);
5003 }
5004
5005 /*
5006  * il_mac_config - mac80211 config callback
5007  */
5008 int
5009 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5010 {
5011         struct il_priv *il = hw->priv;
5012         const struct il_channel_info *ch_info;
5013         struct ieee80211_conf *conf = &hw->conf;
5014         struct ieee80211_channel *channel = conf->chandef.chan;
5015         struct il_ht_config *ht_conf = &il->current_ht_config;
5016         unsigned long flags = 0;
5017         int ret = 0;
5018         u16 ch;
5019         int scan_active = 0;
5020         bool ht_changed = false;
5021
5022         mutex_lock(&il->mutex);
5023         D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5024                    changed);
5025
5026         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5027                 scan_active = 1;
5028                 D_MAC80211("scan active\n");
5029         }
5030
5031         if (changed &
5032             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5033                 /* mac80211 uses static for non-HT which is what we want */
5034                 il->current_ht_config.smps = conf->smps_mode;
5035
5036                 /*
5037                  * Recalculate chain counts.
5038                  *
5039                  * If monitor mode is enabled then mac80211 will
5040                  * set up the SM PS mode to OFF if an HT channel is
5041                  * configured.
5042                  */
5043                 if (il->ops->set_rxon_chain)
5044                         il->ops->set_rxon_chain(il);
5045         }
5046
5047         /* during scanning mac80211 will delay channel setting until
5048          * scan finish with changed = 0
5049          */
5050         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5051
5052                 if (scan_active)
5053                         goto set_ch_out;
5054
5055                 ch = channel->hw_value;
5056                 ch_info = il_get_channel_info(il, channel->band, ch);
5057                 if (!il_is_channel_valid(ch_info)) {
5058                         D_MAC80211("leave - invalid channel\n");
5059                         ret = -EINVAL;
5060                         goto set_ch_out;
5061                 }
5062
5063                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5064                     !il_is_channel_ibss(ch_info)) {
5065                         D_MAC80211("leave - not IBSS channel\n");
5066                         ret = -EINVAL;
5067                         goto set_ch_out;
5068                 }
5069
5070                 spin_lock_irqsave(&il->lock, flags);
5071
5072                 /* Configure HT40 channels */
5073                 if (il->ht.enabled != conf_is_ht(conf)) {
5074                         il->ht.enabled = conf_is_ht(conf);
5075                         ht_changed = true;
5076                 }
5077                 if (il->ht.enabled) {
5078                         if (conf_is_ht40_minus(conf)) {
5079                                 il->ht.extension_chan_offset =
5080                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5081                                 il->ht.is_40mhz = true;
5082                         } else if (conf_is_ht40_plus(conf)) {
5083                                 il->ht.extension_chan_offset =
5084                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5085                                 il->ht.is_40mhz = true;
5086                         } else {
5087                                 il->ht.extension_chan_offset =
5088                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5089                                 il->ht.is_40mhz = false;
5090                         }
5091                 } else
5092                         il->ht.is_40mhz = false;
5093
5094                 /*
5095                  * Default to no protection. Protection mode will
5096                  * later be set from BSS config in il_ht_conf
5097                  */
5098                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5099
5100                 /* if we are switching from ht to 2.4 clear flags
5101                  * from any ht related info since 2.4 does not
5102                  * support ht */
5103                 if ((le16_to_cpu(il->staging.channel) != ch))
5104                         il->staging.flags = 0;
5105
5106                 il_set_rxon_channel(il, channel);
5107                 il_set_rxon_ht(il, ht_conf);
5108
5109                 il_set_flags_for_band(il, channel->band, il->vif);
5110
5111                 spin_unlock_irqrestore(&il->lock, flags);
5112
5113                 if (il->ops->update_bcast_stations)
5114                         ret = il->ops->update_bcast_stations(il);
5115
5116 set_ch_out:
5117                 /* The list of supported rates and rate mask can be different
5118                  * for each band; since the band may have changed, reset
5119                  * the rate mask to what mac80211 lists */
5120                 il_set_rate(il);
5121         }
5122
5123         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5124                 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5125                 if (!il->power_data.ps_disabled)
5126                         IL_WARN_ONCE("Enabling power save might cause firmware crashes\n");
5127                 ret = il_power_update_mode(il, false);
5128                 if (ret)
5129                         D_MAC80211("Error setting sleep level\n");
5130         }
5131
5132         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5133                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5134                            conf->power_level);
5135
5136                 il_set_tx_power(il, conf->power_level, false);
5137         }
5138
5139         if (!il_is_ready(il)) {
5140                 D_MAC80211("leave - not ready\n");
5141                 goto out;
5142         }
5143
5144         if (scan_active)
5145                 goto out;
5146
5147         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5148                 il_commit_rxon(il);
5149         else
5150                 D_INFO("Not re-sending same RXON configuration.\n");
5151         if (ht_changed)
5152                 il_update_qos(il);
5153
5154 out:
5155         D_MAC80211("leave ret %d\n", ret);
5156         mutex_unlock(&il->mutex);
5157
5158         return ret;
5159 }
5160 EXPORT_SYMBOL(il_mac_config);
5161
5162 void
5163 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5164 {
5165         struct il_priv *il = hw->priv;
5166         unsigned long flags;
5167
5168         mutex_lock(&il->mutex);
5169         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5170
5171         spin_lock_irqsave(&il->lock, flags);
5172
5173         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5174
5175         /* new association get rid of ibss beacon skb */
5176         dev_kfree_skb(il->beacon_skb);
5177         il->beacon_skb = NULL;
5178         il->timestamp = 0;
5179
5180         spin_unlock_irqrestore(&il->lock, flags);
5181
5182         il_scan_cancel_timeout(il, 100);
5183         if (!il_is_ready_rf(il)) {
5184                 D_MAC80211("leave - not ready\n");
5185                 mutex_unlock(&il->mutex);
5186                 return;
5187         }
5188
5189         /* we are restarting association process */
5190         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5191         il_commit_rxon(il);
5192
5193         il_set_rate(il);
5194
5195         D_MAC80211("leave\n");
5196         mutex_unlock(&il->mutex);
5197 }
5198 EXPORT_SYMBOL(il_mac_reset_tsf);
5199
5200 static void
5201 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5202 {
5203         struct il_ht_config *ht_conf = &il->current_ht_config;
5204         struct ieee80211_sta *sta;
5205         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5206
5207         D_ASSOC("enter:\n");
5208
5209         if (!il->ht.enabled)
5210                 return;
5211
5212         il->ht.protection =
5213             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5214         il->ht.non_gf_sta_present =
5215             !!(bss_conf->
5216                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5217
5218         ht_conf->single_chain_sufficient = false;
5219
5220         switch (vif->type) {
5221         case NL80211_IFTYPE_STATION:
5222                 rcu_read_lock();
5223                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5224                 if (sta) {
5225                         struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
5226                         int maxstreams;
5227
5228                         maxstreams =
5229                             (ht_cap->mcs.
5230                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5231                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5232                         maxstreams += 1;
5233
5234                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5235                             ht_cap->mcs.rx_mask[2] == 0)
5236                                 ht_conf->single_chain_sufficient = true;
5237                         if (maxstreams <= 1)
5238                                 ht_conf->single_chain_sufficient = true;
5239                 } else {
5240                         /*
5241                          * If at all, this can only happen through a race
5242                          * when the AP disconnects us while we're still
5243                          * setting up the connection, in that case mac80211
5244                          * will soon tell us about that.
5245                          */
5246                         ht_conf->single_chain_sufficient = true;
5247                 }
5248                 rcu_read_unlock();
5249                 break;
5250         case NL80211_IFTYPE_ADHOC:
5251                 ht_conf->single_chain_sufficient = true;
5252                 break;
5253         default:
5254                 break;
5255         }
5256
5257         D_ASSOC("leave\n");
5258 }
5259
5260 static inline void
5261 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5262 {
5263         /*
5264          * inform the ucode that there is no longer an
5265          * association and that no more packets should be
5266          * sent
5267          */
5268         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5269         il->staging.assoc_id = 0;
5270         il_commit_rxon(il);
5271 }
5272
5273 static void
5274 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5275 {
5276         struct il_priv *il = hw->priv;
5277         unsigned long flags;
5278         __le64 timestamp;
5279         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5280
5281         if (!skb)
5282                 return;
5283
5284         D_MAC80211("enter\n");
5285
5286         lockdep_assert_held(&il->mutex);
5287
5288         if (!il->beacon_enabled) {
5289                 IL_ERR("update beacon with no beaconing enabled\n");
5290                 dev_kfree_skb(skb);
5291                 return;
5292         }
5293
5294         spin_lock_irqsave(&il->lock, flags);
5295         dev_kfree_skb(il->beacon_skb);
5296         il->beacon_skb = skb;
5297
5298         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5299         il->timestamp = le64_to_cpu(timestamp);
5300
5301         D_MAC80211("leave\n");
5302         spin_unlock_irqrestore(&il->lock, flags);
5303
5304         if (!il_is_ready_rf(il)) {
5305                 D_MAC80211("leave - RF not ready\n");
5306                 return;
5307         }
5308
5309         il->ops->post_associate(il);
5310 }
5311
5312 void
5313 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5314                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5315 {
5316         struct il_priv *il = hw->priv;
5317         int ret;
5318
5319         mutex_lock(&il->mutex);
5320         D_MAC80211("enter: changes 0x%x\n", changes);
5321
5322         if (!il_is_alive(il)) {
5323                 D_MAC80211("leave - not alive\n");
5324                 mutex_unlock(&il->mutex);
5325                 return;
5326         }
5327
5328         if (changes & BSS_CHANGED_QOS) {
5329                 unsigned long flags;
5330
5331                 spin_lock_irqsave(&il->lock, flags);
5332                 il->qos_data.qos_active = bss_conf->qos;
5333                 il_update_qos(il);
5334                 spin_unlock_irqrestore(&il->lock, flags);
5335         }
5336
5337         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5338                 /* FIXME: can we remove beacon_enabled ? */
5339                 if (vif->bss_conf.enable_beacon)
5340                         il->beacon_enabled = true;
5341                 else
5342                         il->beacon_enabled = false;
5343         }
5344
5345         if (changes & BSS_CHANGED_BSSID) {
5346                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5347
5348                 /*
5349                  * On passive channel we wait with blocked queues to see if
5350                  * there is traffic on that channel. If no frame will be
5351                  * received (what is very unlikely since scan detects AP on
5352                  * that channel, but theoretically possible), mac80211 associate
5353                  * procedure will time out and mac80211 will call us with NULL
5354                  * bssid. We have to unblock queues on such condition.
5355                  */
5356                 if (is_zero_ether_addr(bss_conf->bssid))
5357                         il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5358
5359                 /*
5360                  * If there is currently a HW scan going on in the background,
5361                  * then we need to cancel it, otherwise sometimes we are not
5362                  * able to authenticate (FIXME: why ?)
5363                  */
5364                 if (il_scan_cancel_timeout(il, 100)) {
5365                         D_MAC80211("leave - scan abort failed\n");
5366                         mutex_unlock(&il->mutex);
5367                         return;
5368                 }
5369
5370                 /* mac80211 only sets assoc when in STATION mode */
5371                 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5372
5373                 /* FIXME: currently needed in a few places */
5374                 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5375         }
5376
5377         /*
5378          * This needs to be after setting the BSSID in case
5379          * mac80211 decides to do both changes at once because
5380          * it will invoke post_associate.
5381          */
5382         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5383                 il_beacon_update(hw, vif);
5384
5385         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5386                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5387                 if (bss_conf->use_short_preamble)
5388                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5389                 else
5390                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5391         }
5392
5393         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5394                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5395                 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5396                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5397                 else
5398                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5399                 if (bss_conf->use_cts_prot)
5400                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5401                 else
5402                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5403         }
5404
5405         if (changes & BSS_CHANGED_BASIC_RATES) {
5406                 /* XXX use this information
5407                  *
5408                  * To do that, remove code from il_set_rate() and put something
5409                  * like this here:
5410                  *
5411                  if (A-band)
5412                  il->staging.ofdm_basic_rates =
5413                  bss_conf->basic_rates;
5414                  else
5415                  il->staging.ofdm_basic_rates =
5416                  bss_conf->basic_rates >> 4;
5417                  il->staging.cck_basic_rates =
5418                  bss_conf->basic_rates & 0xF;
5419                  */
5420         }
5421
5422         if (changes & BSS_CHANGED_HT) {
5423                 il_ht_conf(il, vif);
5424
5425                 if (il->ops->set_rxon_chain)
5426                         il->ops->set_rxon_chain(il);
5427         }
5428
5429         if (changes & BSS_CHANGED_ASSOC) {
5430                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5431                 if (bss_conf->assoc) {
5432                         il->timestamp = bss_conf->sync_tsf;
5433
5434                         if (!il_is_rfkill(il))
5435                                 il->ops->post_associate(il);
5436                 } else
5437                         il_set_no_assoc(il, vif);
5438         }
5439
5440         if (changes && il_is_associated(il) && bss_conf->aid) {
5441                 D_MAC80211("Changes (%#x) while associated\n", changes);
5442                 ret = il_send_rxon_assoc(il);
5443                 if (!ret) {
5444                         /* Sync active_rxon with latest change. */
5445                         memcpy((void *)&il->active, &il->staging,
5446                                sizeof(struct il_rxon_cmd));
5447                 }
5448         }
5449
5450         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5451                 if (vif->bss_conf.enable_beacon) {
5452                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5453                                ETH_ALEN);
5454                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5455                         il->ops->config_ap(il);
5456                 } else
5457                         il_set_no_assoc(il, vif);
5458         }
5459
5460         if (changes & BSS_CHANGED_IBSS) {
5461                 ret = il->ops->manage_ibss_station(il, vif,
5462                                                    bss_conf->ibss_joined);
5463                 if (ret)
5464                         IL_ERR("failed to %s IBSS station %pM\n",
5465                                bss_conf->ibss_joined ? "add" : "remove",
5466                                bss_conf->bssid);
5467         }
5468
5469         D_MAC80211("leave\n");
5470         mutex_unlock(&il->mutex);
5471 }
5472 EXPORT_SYMBOL(il_mac_bss_info_changed);
5473
5474 irqreturn_t
5475 il_isr(int irq, void *data)
5476 {
5477         struct il_priv *il = data;
5478         u32 inta, inta_mask;
5479         u32 inta_fh;
5480         unsigned long flags;
5481         if (!il)
5482                 return IRQ_NONE;
5483
5484         spin_lock_irqsave(&il->lock, flags);
5485
5486         /* Disable (but don't clear!) interrupts here to avoid
5487          *    back-to-back ISRs and sporadic interrupts from our NIC.
5488          * If we have something to service, the tasklet will re-enable ints.
5489          * If we *don't* have something, we'll re-enable before leaving here. */
5490         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5491         _il_wr(il, CSR_INT_MASK, 0x00000000);
5492
5493         /* Discover which interrupts are active/pending */
5494         inta = _il_rd(il, CSR_INT);
5495         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5496
5497         /* Ignore interrupt if there's nothing in NIC to service.
5498          * This may be due to IRQ shared with another device,
5499          * or due to sporadic interrupts thrown from our NIC. */
5500         if (!inta && !inta_fh) {
5501                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5502                 goto none;
5503         }
5504
5505         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5506                 /* Hardware disappeared. It might have already raised
5507                  * an interrupt */
5508                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5509                 goto unplugged;
5510         }
5511
5512         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5513               inta_fh);
5514
5515         inta &= ~CSR_INT_BIT_SCD;
5516
5517         /* il_irq_tasklet() will service interrupts and re-enable them */
5518         if (likely(inta || inta_fh))
5519                 tasklet_schedule(&il->irq_tasklet);
5520
5521 unplugged:
5522         spin_unlock_irqrestore(&il->lock, flags);
5523         return IRQ_HANDLED;
5524
5525 none:
5526         /* re-enable interrupts here since we don't have anything to service. */
5527         /* only Re-enable if disabled by irq */
5528         if (test_bit(S_INT_ENABLED, &il->status))
5529                 il_enable_interrupts(il);
5530         spin_unlock_irqrestore(&il->lock, flags);
5531         return IRQ_NONE;
5532 }
5533 EXPORT_SYMBOL(il_isr);
5534
5535 /*
5536  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5537  *  function.
5538  */
5539 void
5540 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5541                      __le16 fc, __le32 *tx_flags)
5542 {
5543         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5544                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5545                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5546                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5547
5548                 if (!ieee80211_is_mgmt(fc))
5549                         return;
5550
5551                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5552                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5553                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5554                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5555                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5556                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5557                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5558                         break;
5559                 }
5560         } else if (info->control.rates[0].
5561                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5562                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5563                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5564                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5565         }
5566 }
5567 EXPORT_SYMBOL(il_tx_cmd_protection);