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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/types.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/pci.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/delay.h>
  39 #include <linux/skbuff.h>
  40 #include <net/mac80211.h>
  41
  42 #include "common.h"
  43
  44 int
  45 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
  46 {
  47         const int interval = 10; /* microseconds */
  48         int t = 0;
  49
  50         do {
  51                 if ((_il_rd(il, addr) & mask) == (bits & mask))
  52                         return t;
  53                 udelay(interval);
  54                 t += interval;
  55         } while (t < timeout);
  56
  57         return -ETIMEDOUT;
  58 }
  59 EXPORT_SYMBOL(_il_poll_bit);
  60
  61 void
  62 il_set_bit(struct il_priv *p, u32 r, u32 m)
  63 {
  64         unsigned long reg_flags;
  65
  66         spin_lock_irqsave(&p->reg_lock, reg_flags);
  67         _il_set_bit(p, r, m);
  68         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  69 }
  70 EXPORT_SYMBOL(il_set_bit);
  71
  72 void
  73 il_clear_bit(struct il_priv *p, u32 r, u32 m)
  74 {
  75         unsigned long reg_flags;
  76
  77         spin_lock_irqsave(&p->reg_lock, reg_flags);
  78         _il_clear_bit(p, r, m);
  79         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  80 }
  81 EXPORT_SYMBOL(il_clear_bit);
  82
  83 bool
  84 _il_grab_nic_access(struct il_priv *il)
  85 {
  86         int ret;
  87         u32 val;
  88
  89         /* this bit wakes up the NIC */
  90         _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
  91
  92         /*
  93          * These bits say the device is running, and should keep running for
  94          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
  95          * but they do not indicate that embedded SRAM is restored yet;
  96          * 3945 and 4965 have volatile SRAM, and must save/restore contents
  97          * to/from host DRAM when sleeping/waking for power-saving.
  98          * Each direction takes approximately 1/4 millisecond; with this
  99          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
 100          * series of register accesses are expected (e.g. reading Event Log),
 101          * to keep device from sleeping.
 102          *
 103          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
 104          * SRAM is okay/restored.  We don't check that here because this call
 105          * is just for hardware register access; but GP1 MAC_SLEEP check is a
 106          * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
 107          *
 108          */
 109         ret =
 110             _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 111                          (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 112                           CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
 113         if (unlikely(ret < 0)) {
 114                 val = _il_rd(il, CSR_GP_CNTRL);
 115                 WARN_ONCE(1, "Timeout waiting for ucode processor access "
 116                              "(CSR_GP_CNTRL 0x%08x)\n", val);
 117                 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 118                 return false;
 119         }
 120
 121         return true;
 122 }
 123 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
 124
 125 int
 126 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
 127 {
 128         const int interval = 10; /* microseconds */
 129         int t = 0;
 130
 131         do {
 132                 if ((il_rd(il, addr) & mask) == mask)
 133                         return t;
 134                 udelay(interval);
 135                 t += interval;
 136         } while (t < timeout);
 137
 138         return -ETIMEDOUT;
 139 }
 140 EXPORT_SYMBOL(il_poll_bit);
 141
 142 u32
 143 il_rd_prph(struct il_priv *il, u32 reg)
 144 {
 145         unsigned long reg_flags;
 146         u32 val;
 147
 148         spin_lock_irqsave(&il->reg_lock, reg_flags);
 149         _il_grab_nic_access(il);
 150         val = _il_rd_prph(il, reg);
 151         _il_release_nic_access(il);
 152         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 153         return val;
 154 }
 155 EXPORT_SYMBOL(il_rd_prph);
 156
 157 void
 158 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
 159 {
 160         unsigned long reg_flags;
 161
 162         spin_lock_irqsave(&il->reg_lock, reg_flags);
 163         if (likely(_il_grab_nic_access(il))) {
 164                 _il_wr_prph(il, addr, val);
 165                 _il_release_nic_access(il);
 166         }
 167         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 168 }
 169 EXPORT_SYMBOL(il_wr_prph);
 170
 171 u32
 172 il_read_targ_mem(struct il_priv *il, u32 addr)
 173 {
 174         unsigned long reg_flags;
 175         u32 value;
 176
 177         spin_lock_irqsave(&il->reg_lock, reg_flags);
 178         _il_grab_nic_access(il);
 179
 180         _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
 181         value = _il_rd(il, HBUS_TARG_MEM_RDAT);
 182
 183         _il_release_nic_access(il);
 184         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 185         return value;
 186 }
 187 EXPORT_SYMBOL(il_read_targ_mem);
 188
 189 void
 190 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
 191 {
 192         unsigned long reg_flags;
 193
 194         spin_lock_irqsave(&il->reg_lock, reg_flags);
 195         if (likely(_il_grab_nic_access(il))) {
 196                 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
 197                 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
 198                 _il_release_nic_access(il);
 199         }
 200         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 201 }
 202 EXPORT_SYMBOL(il_write_targ_mem);
 203
 204 const char *
 205 il_get_cmd_string(u8 cmd)
 206 {
 207         switch (cmd) {
 208                 IL_CMD(N_ALIVE);
 209                 IL_CMD(N_ERROR);
 210                 IL_CMD(C_RXON);
 211                 IL_CMD(C_RXON_ASSOC);
 212                 IL_CMD(C_QOS_PARAM);
 213                 IL_CMD(C_RXON_TIMING);
 214                 IL_CMD(C_ADD_STA);
 215                 IL_CMD(C_REM_STA);
 216                 IL_CMD(C_WEPKEY);
 217                 IL_CMD(N_3945_RX);
 218                 IL_CMD(C_TX);
 219                 IL_CMD(C_RATE_SCALE);
 220                 IL_CMD(C_LEDS);
 221                 IL_CMD(C_TX_LINK_QUALITY_CMD);
 222                 IL_CMD(C_CHANNEL_SWITCH);
 223                 IL_CMD(N_CHANNEL_SWITCH);
 224                 IL_CMD(C_SPECTRUM_MEASUREMENT);
 225                 IL_CMD(N_SPECTRUM_MEASUREMENT);
 226                 IL_CMD(C_POWER_TBL);
 227                 IL_CMD(N_PM_SLEEP);
 228                 IL_CMD(N_PM_DEBUG_STATS);
 229                 IL_CMD(C_SCAN);
 230                 IL_CMD(C_SCAN_ABORT);
 231                 IL_CMD(N_SCAN_START);
 232                 IL_CMD(N_SCAN_RESULTS);
 233                 IL_CMD(N_SCAN_COMPLETE);
 234                 IL_CMD(N_BEACON);
 235                 IL_CMD(C_TX_BEACON);
 236                 IL_CMD(C_TX_PWR_TBL);
 237                 IL_CMD(C_BT_CONFIG);
 238                 IL_CMD(C_STATS);
 239                 IL_CMD(N_STATS);
 240                 IL_CMD(N_CARD_STATE);
 241                 IL_CMD(N_MISSED_BEACONS);
 242                 IL_CMD(C_CT_KILL_CONFIG);
 243                 IL_CMD(C_SENSITIVITY);
 244                 IL_CMD(C_PHY_CALIBRATION);
 245                 IL_CMD(N_RX_PHY);
 246                 IL_CMD(N_RX_MPDU);
 247                 IL_CMD(N_RX);
 248                 IL_CMD(N_COMPRESSED_BA);
 249         default:
 250                 return "UNKNOWN";
 251
 252         }
 253 }
 254 EXPORT_SYMBOL(il_get_cmd_string);
 255
 256 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 257
 258 static void
 259 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
 260                         struct il_rx_pkt *pkt)
 261 {
 262         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 263                 IL_ERR("Bad return from %s (0x%08X)\n",
 264                        il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 265                 return;
 266         }
 267 #ifdef CONFIG_IWLEGACY_DEBUG
 268         switch (cmd->hdr.cmd) {
 269         case C_TX_LINK_QUALITY_CMD:
 270         case C_SENSITIVITY:
 271                 D_HC_DUMP("back from %s (0x%08X)\n",
 272                           il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 273                 break;
 274         default:
 275                 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
 276                      pkt->hdr.flags);
 277         }
 278 #endif
 279 }
 280
 281 static int
 282 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 283 {
 284         int ret;
 285
 286         BUG_ON(!(cmd->flags & CMD_ASYNC));
 287
 288         /* An asynchronous command can not expect an SKB to be set. */
 289         BUG_ON(cmd->flags & CMD_WANT_SKB);
 290
 291         /* Assign a generic callback if one is not provided */
 292         if (!cmd->callback)
 293                 cmd->callback = il_generic_cmd_callback;
 294
 295         if (test_bit(S_EXIT_PENDING, &il->status))
 296                 return -EBUSY;
 297
 298         ret = il_enqueue_hcmd(il, cmd);
 299         if (ret < 0) {
 300                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 301                        il_get_cmd_string(cmd->id), ret);
 302                 return ret;
 303         }
 304         return 0;
 305 }
 306
 307 int
 308 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 309 {
 310         int cmd_idx;
 311         int ret;
 312
 313         lockdep_assert_held(&il->mutex);
 314
 315         BUG_ON(cmd->flags & CMD_ASYNC);
 316
 317         /* A synchronous command can not have a callback set. */
 318         BUG_ON(cmd->callback);
 319
 320         D_INFO("Attempting to send sync command %s\n",
 321                il_get_cmd_string(cmd->id));
 322
 323         set_bit(S_HCMD_ACTIVE, &il->status);
 324         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 325                il_get_cmd_string(cmd->id));
 326
 327         cmd_idx = il_enqueue_hcmd(il, cmd);
 328         if (cmd_idx < 0) {
 329                 ret = cmd_idx;
 330                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 331                        il_get_cmd_string(cmd->id), ret);
 332                 goto out;
 333         }
 334
 335         ret = wait_event_timeout(il->wait_command_queue,
 336                                  !test_bit(S_HCMD_ACTIVE, &il->status),
 337                                  HOST_COMPLETE_TIMEOUT);
 338         if (!ret) {
 339                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 340                         IL_ERR("Error sending %s: time out after %dms.\n",
 341                                il_get_cmd_string(cmd->id),
 342                                jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 343
 344                         clear_bit(S_HCMD_ACTIVE, &il->status);
 345                         D_INFO("Clearing HCMD_ACTIVE for command %s\n",
 346                                il_get_cmd_string(cmd->id));
 347                         ret = -ETIMEDOUT;
 348                         goto cancel;
 349                 }
 350         }
 351
 352         if (test_bit(S_RFKILL, &il->status)) {
 353                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 354                        il_get_cmd_string(cmd->id));
 355                 ret = -ECANCELED;
 356                 goto fail;
 357         }
 358         if (test_bit(S_FW_ERROR, &il->status)) {
 359                 IL_ERR("Command %s failed: FW Error\n",
 360                        il_get_cmd_string(cmd->id));
 361                 ret = -EIO;
 362                 goto fail;
 363         }
 364         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 365                 IL_ERR("Error: Response NULL in '%s'\n",
 366                        il_get_cmd_string(cmd->id));
 367                 ret = -EIO;
 368                 goto cancel;
 369         }
 370
 371         ret = 0;
 372         goto out;
 373
 374 cancel:
 375         if (cmd->flags & CMD_WANT_SKB) {
 376                 /*
 377                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 378                  * TX cmd queue. Otherwise in case the cmd comes
 379                  * in later, it will possibly set an invalid
 380                  * address (cmd->meta.source).
 381                  */
 382                 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
 383         }
 384 fail:
 385         if (cmd->reply_page) {
 386                 il_free_pages(il, cmd->reply_page);
 387                 cmd->reply_page = 0;
 388         }
 389 out:
 390         return ret;
 391 }
 392 EXPORT_SYMBOL(il_send_cmd_sync);
 393
 394 int
 395 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 396 {
 397         if (cmd->flags & CMD_ASYNC)
 398                 return il_send_cmd_async(il, cmd);
 399
 400         return il_send_cmd_sync(il, cmd);
 401 }
 402 EXPORT_SYMBOL(il_send_cmd);
 403
 404 int
 405 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 406 {
 407         struct il_host_cmd cmd = {
 408                 .id = id,
 409                 .len = len,
 410                 .data = data,
 411         };
 412
 413         return il_send_cmd_sync(il, &cmd);
 414 }
 415 EXPORT_SYMBOL(il_send_cmd_pdu);
 416
 417 int
 418 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
 419                       void (*callback) (struct il_priv *il,
 420                                         struct il_device_cmd *cmd,
 421                                         struct il_rx_pkt *pkt))
 422 {
 423         struct il_host_cmd cmd = {
 424                 .id = id,
 425                 .len = len,
 426                 .data = data,
 427         };
 428
 429         cmd.flags |= CMD_ASYNC;
 430         cmd.callback = callback;
 431
 432         return il_send_cmd_async(il, &cmd);
 433 }
 434 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 435
 436 /* default: IL_LED_BLINK(0) using blinking idx table */
 437 static int led_mode;
 438 module_param(led_mode, int, S_IRUGO);
 439 MODULE_PARM_DESC(led_mode,
 440                  "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
 441
 442 /* Throughput           OFF time(ms)    ON time (ms)
 443  *      >300                    25              25
 444  *      >200 to 300             40              40
 445  *      >100 to 200             55              55
 446  *      >70 to 100              65              65
 447  *      >50 to 70               75              75
 448  *      >20 to 50               85              85
 449  *      >10 to 20               95              95
 450  *      >5 to 10                110             110
 451  *      >1 to 5                 130             130
 452  *      >0 to 1                 167             167
 453  *      <=0                                     SOLID ON
 454  */
 455 static const struct ieee80211_tpt_blink il_blink[] = {
 456         {.throughput = 0,               .blink_time = 334},
 457         {.throughput = 1 * 1024 - 1,    .blink_time = 260},
 458         {.throughput = 5 * 1024 - 1,    .blink_time = 220},
 459         {.throughput = 10 * 1024 - 1,   .blink_time = 190},
 460         {.throughput = 20 * 1024 - 1,   .blink_time = 170},
 461         {.throughput = 50 * 1024 - 1,   .blink_time = 150},
 462         {.throughput = 70 * 1024 - 1,   .blink_time = 130},
 463         {.throughput = 100 * 1024 - 1,  .blink_time = 110},
 464         {.throughput = 200 * 1024 - 1,  .blink_time = 80},
 465         {.throughput = 300 * 1024 - 1,  .blink_time = 50},
 466 };
 467
 468 /*
 469  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 470  * Led blink rate analysis showed an average deviation of 0% on 3945,
 471  * 5% on 4965 HW.
 472  * Need to compensate on the led on/off time per HW according to the deviation
 473  * to achieve the desired led frequency
 474  * The calculation is: (100-averageDeviation)/100 * blinkTime
 475  * For code efficiency the calculation will be:
 476  *     compensation = (100 - averageDeviation) * 64 / 100
 477  *     NewBlinkTime = (compensation * BlinkTime) / 64
 478  */
 479 static inline u8
 480 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
 481 {
 482         if (!compensation) {
 483                 IL_ERR("undefined blink compensation: "
 484                        "use pre-defined blinking time\n");
 485                 return time;
 486         }
 487
 488         return (u8) ((time * compensation) >> 6);
 489 }
 490
 491 /* Set led pattern command */
 492 static int
 493 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
 494 {
 495         struct il_led_cmd led_cmd = {
 496                 .id = IL_LED_LINK,
 497                 .interval = IL_DEF_LED_INTRVL
 498         };
 499         int ret;
 500
 501         if (!test_bit(S_READY, &il->status))
 502                 return -EBUSY;
 503
 504         if (il->blink_on == on && il->blink_off == off)
 505                 return 0;
 506
 507         if (off == 0) {
 508                 /* led is SOLID_ON */
 509                 on = IL_LED_SOLID;
 510         }
 511
 512         D_LED("Led blink time compensation=%u\n",
 513               il->cfg->led_compensation);
 514         led_cmd.on =
 515             il_blink_compensation(il, on,
 516                                   il->cfg->led_compensation);
 517         led_cmd.off =
 518             il_blink_compensation(il, off,
 519                                   il->cfg->led_compensation);
 520
 521         ret = il->ops->send_led_cmd(il, &led_cmd);
 522         if (!ret) {
 523                 il->blink_on = on;
 524                 il->blink_off = off;
 525         }
 526         return ret;
 527 }
 528
 529 static void
 530 il_led_brightness_set(struct led_classdev *led_cdev,
 531                       enum led_brightness brightness)
 532 {
 533         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 534         unsigned long on = 0;
 535
 536         if (brightness > 0)
 537                 on = IL_LED_SOLID;
 538
 539         il_led_cmd(il, on, 0);
 540 }
 541
 542 static int
 543 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 544                  unsigned long *delay_off)
 545 {
 546         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 547
 548         return il_led_cmd(il, *delay_on, *delay_off);
 549 }
 550
 551 void
 552 il_leds_init(struct il_priv *il)
 553 {
 554         int mode = led_mode;
 555         int ret;
 556
 557         if (mode == IL_LED_DEFAULT)
 558                 mode = il->cfg->led_mode;
 559
 560         il->led.name =
 561             kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
 562         il->led.brightness_set = il_led_brightness_set;
 563         il->led.blink_set = il_led_blink_set;
 564         il->led.max_brightness = 1;
 565
 566         switch (mode) {
 567         case IL_LED_DEFAULT:
 568                 WARN_ON(1);
 569                 break;
 570         case IL_LED_BLINK:
 571                 il->led.default_trigger =
 572                     ieee80211_create_tpt_led_trigger(il->hw,
 573                                                      IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 574                                                      il_blink,
 575                                                      ARRAY_SIZE(il_blink));
 576                 break;
 577         case IL_LED_RF_STATE:
 578                 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
 579                 break;
 580         }
 581
 582         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 583         if (ret) {
 584                 kfree(il->led.name);
 585                 return;
 586         }
 587
 588         il->led_registered = true;
 589 }
 590 EXPORT_SYMBOL(il_leds_init);
 591
 592 void
 593 il_leds_exit(struct il_priv *il)
 594 {
 595         if (!il->led_registered)
 596                 return;
 597
 598         led_classdev_unregister(&il->led);
 599         kfree(il->led.name);
 600 }
 601 EXPORT_SYMBOL(il_leds_exit);
 602
 603 /************************** EEPROM BANDS ****************************
 604  *
 605  * The il_eeprom_band definitions below provide the mapping from the
 606  * EEPROM contents to the specific channel number supported for each
 607  * band.
 608  *
 609  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 610  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 611  * The specific geography and calibration information for that channel
 612  * is contained in the eeprom map itself.
 613  *
 614  * During init, we copy the eeprom information and channel map
 615  * information into il->channel_info_24/52 and il->channel_map_24/52
 616  *
 617  * channel_map_24/52 provides the idx in the channel_info array for a
 618  * given channel.  We have to have two separate maps as there is channel
 619  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 620  * band_2
 621  *
 622  * A value of 0xff stored in the channel_map indicates that the channel
 623  * is not supported by the hardware at all.
 624  *
 625  * A value of 0xfe in the channel_map indicates that the channel is not
 626  * valid for Tx with the current hardware.  This means that
 627  * while the system can tune and receive on a given channel, it may not
 628  * be able to associate or transmit any frames on that
 629  * channel.  There is no corresponding channel information for that
 630  * entry.
 631  *
 632  *********************************************************************/
 633
 634 /* 2.4 GHz */
 635 const u8 il_eeprom_band_1[14] = {
 636         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 637 };
 638
 639 /* 5.2 GHz bands */
 640 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 641         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 642 };
 643
 644 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 645         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 646 };
 647
 648 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 649         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 650 };
 651
 652 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 653         145, 149, 153, 157, 161, 165
 654 };
 655
 656 static const u8 il_eeprom_band_6[] = {  /* 2.4 ht40 channel */
 657         1, 2, 3, 4, 5, 6, 7
 658 };
 659
 660 static const u8 il_eeprom_band_7[] = {  /* 5.2 ht40 channel */
 661         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 662 };
 663
 664 /******************************************************************************
 665  *
 666  * EEPROM related functions
 667  *
 668 ******************************************************************************/
 669
 670 static int
 671 il_eeprom_verify_signature(struct il_priv *il)
 672 {
 673         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 674         int ret = 0;
 675
 676         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 677         switch (gp) {
 678         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 679         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 680                 break;
 681         default:
 682                 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
 683                 ret = -ENOENT;
 684                 break;
 685         }
 686         return ret;
 687 }
 688
 689 const u8 *
 690 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 691 {
 692         BUG_ON(offset >= il->cfg->eeprom_size);
 693         return &il->eeprom[offset];
 694 }
 695 EXPORT_SYMBOL(il_eeprom_query_addr);
 696
 697 u16
 698 il_eeprom_query16(const struct il_priv *il, size_t offset)
 699 {
 700         if (!il->eeprom)
 701                 return 0;
 702         return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
 703 }
 704 EXPORT_SYMBOL(il_eeprom_query16);
 705
 706 /**
 707  * il_eeprom_init - read EEPROM contents
 708  *
 709  * Load the EEPROM contents from adapter into il->eeprom
 710  *
 711  * NOTE:  This routine uses the non-debug IO access functions.
 712  */
 713 int
 714 il_eeprom_init(struct il_priv *il)
 715 {
 716         __le16 *e;
 717         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 718         int sz;
 719         int ret;
 720         u16 addr;
 721
 722         /* allocate eeprom */
 723         sz = il->cfg->eeprom_size;
 724         D_EEPROM("NVM size = %d\n", sz);
 725         il->eeprom = kzalloc(sz, GFP_KERNEL);
 726         if (!il->eeprom)
 727                 return -ENOMEM;
 728
 729         e = (__le16 *) il->eeprom;
 730
 731         il->ops->apm_init(il);
 732
 733         ret = il_eeprom_verify_signature(il);
 734         if (ret < 0) {
 735                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 736                 ret = -ENOENT;
 737                 goto err;
 738         }
 739
 740         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 741         ret = il->ops->eeprom_acquire_semaphore(il);
 742         if (ret < 0) {
 743                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 744                 ret = -ENOENT;
 745                 goto err;
 746         }
 747
 748         /* eeprom is an array of 16bit values */
 749         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 750                 u32 r;
 751
 752                 _il_wr(il, CSR_EEPROM_REG,
 753                        CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 754
 755                 ret =
 756                     _il_poll_bit(il, CSR_EEPROM_REG,
 757                                  CSR_EEPROM_REG_READ_VALID_MSK,
 758                                  CSR_EEPROM_REG_READ_VALID_MSK,
 759                                  IL_EEPROM_ACCESS_TIMEOUT);
 760                 if (ret < 0) {
 761                         IL_ERR("Time out reading EEPROM[%d]\n", addr);
 762                         goto done;
 763                 }
 764                 r = _il_rd(il, CSR_EEPROM_REG);
 765                 e[addr / 2] = cpu_to_le16(r >> 16);
 766         }
 767
 768         D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 769                  il_eeprom_query16(il, EEPROM_VERSION));
 770
 771         ret = 0;
 772 done:
 773         il->ops->eeprom_release_semaphore(il);
 774
 775 err:
 776         if (ret)
 777                 il_eeprom_free(il);
 778         /* Reset chip to save power until we load uCode during "up". */
 779         il_apm_stop(il);
 780         return ret;
 781 }
 782 EXPORT_SYMBOL(il_eeprom_init);
 783
 784 void
 785 il_eeprom_free(struct il_priv *il)
 786 {
 787         kfree(il->eeprom);
 788         il->eeprom = NULL;
 789 }
 790 EXPORT_SYMBOL(il_eeprom_free);
 791
 792 static void
 793 il_init_band_reference(const struct il_priv *il, int eep_band,
 794                        int *eeprom_ch_count,
 795                        const struct il_eeprom_channel **eeprom_ch_info,
 796                        const u8 **eeprom_ch_idx)
 797 {
 798         u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 799
 800         switch (eep_band) {
 801         case 1:         /* 2.4GHz band */
 802                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 803                 *eeprom_ch_info =
 804                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 805                                                                      offset);
 806                 *eeprom_ch_idx = il_eeprom_band_1;
 807                 break;
 808         case 2:         /* 4.9GHz band */
 809                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 810                 *eeprom_ch_info =
 811                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 812                                                                      offset);
 813                 *eeprom_ch_idx = il_eeprom_band_2;
 814                 break;
 815         case 3:         /* 5.2GHz band */
 816                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 817                 *eeprom_ch_info =
 818                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 819                                                                      offset);
 820                 *eeprom_ch_idx = il_eeprom_band_3;
 821                 break;
 822         case 4:         /* 5.5GHz band */
 823                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 824                 *eeprom_ch_info =
 825                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 826                                                                      offset);
 827                 *eeprom_ch_idx = il_eeprom_band_4;
 828                 break;
 829         case 5:         /* 5.7GHz band */
 830                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 831                 *eeprom_ch_info =
 832                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 833                                                                      offset);
 834                 *eeprom_ch_idx = il_eeprom_band_5;
 835                 break;
 836         case 6:         /* 2.4GHz ht40 channels */
 837                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 838                 *eeprom_ch_info =
 839                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 840                                                                      offset);
 841                 *eeprom_ch_idx = il_eeprom_band_6;
 842                 break;
 843         case 7:         /* 5 GHz ht40 channels */
 844                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 845                 *eeprom_ch_info =
 846                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 847                                                                      offset);
 848                 *eeprom_ch_idx = il_eeprom_band_7;
 849                 break;
 850         default:
 851                 BUG();
 852         }
 853 }
 854
 855 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 856                             ? # x " " : "")
 857 /**
 858  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 859  *
 860  * Does not set up a command, or touch hardware.
 861  */
 862 static int
 863 il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
 864                       const struct il_eeprom_channel *eeprom_ch,
 865                       u8 clear_ht40_extension_channel)
 866 {
 867         struct il_channel_info *ch_info;
 868
 869         ch_info =
 870             (struct il_channel_info *)il_get_channel_info(il, band, channel);
 871
 872         if (!il_is_channel_valid(ch_info))
 873                 return -1;
 874
 875         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 876                  " Ad-Hoc %ssupported\n", ch_info->channel,
 877                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 878                  CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 879                  CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 880                  CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 881                  eeprom_ch->max_power_avg,
 882                  ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 883                   !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 884
 885         ch_info->ht40_eeprom = *eeprom_ch;
 886         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 887         ch_info->ht40_flags = eeprom_ch->flags;
 888         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 889                 ch_info->ht40_extension_channel &=
 890                     ~clear_ht40_extension_channel;
 891
 892         return 0;
 893 }
 894
 895 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 896                             ? # x " " : "")
 897
 898 /**
 899  * il_init_channel_map - Set up driver's info for all possible channels
 900  */
 901 int
 902 il_init_channel_map(struct il_priv *il)
 903 {
 904         int eeprom_ch_count = 0;
 905         const u8 *eeprom_ch_idx = NULL;
 906         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 907         int band, ch;
 908         struct il_channel_info *ch_info;
 909
 910         if (il->channel_count) {
 911                 D_EEPROM("Channel map already initialized.\n");
 912                 return 0;
 913         }
 914
 915         D_EEPROM("Initializing regulatory info from EEPROM\n");
 916
 917         il->channel_count =
 918             ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 919             ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 920             ARRAY_SIZE(il_eeprom_band_5);
 921
 922         D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 923
 924         il->channel_info =
 925             kzalloc(sizeof(struct il_channel_info) * il->channel_count,
 926                     GFP_KERNEL);
 927         if (!il->channel_info) {
 928                 IL_ERR("Could not allocate channel_info\n");
 929                 il->channel_count = 0;
 930                 return -ENOMEM;
 931         }
 932
 933         ch_info = il->channel_info;
 934
 935         /* Loop through the 5 EEPROM bands adding them in order to the
 936          * channel map we maintain (that contains additional information than
 937          * what just in the EEPROM) */
 938         for (band = 1; band <= 5; band++) {
 939
 940                 il_init_band_reference(il, band, &eeprom_ch_count,
 941                                        &eeprom_ch_info, &eeprom_ch_idx);
 942
 943                 /* Loop through each band adding each of the channels */
 944                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 945                         ch_info->channel = eeprom_ch_idx[ch];
 946                         ch_info->band =
 947                             (band ==
 948                              1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 949
 950                         /* permanently store EEPROM's channel regulatory flags
 951                          *   and max power in channel info database. */
 952                         ch_info->eeprom = eeprom_ch_info[ch];
 953
 954                         /* Copy the run-time flags so they are there even on
 955                          * invalid channels */
 956                         ch_info->flags = eeprom_ch_info[ch].flags;
 957                         /* First write that ht40 is not enabled, and then enable
 958                          * one by one */
 959                         ch_info->ht40_extension_channel =
 960                             IEEE80211_CHAN_NO_HT40;
 961
 962                         if (!(il_is_channel_valid(ch_info))) {
 963                                 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 964                                          "No traffic\n", ch_info->channel,
 965                                          ch_info->flags,
 966                                          il_is_channel_a_band(ch_info) ? "5.2" :
 967                                          "2.4");
 968                                 ch_info++;
 969                                 continue;
 970                         }
 971
 972                         /* Initialize regulatory-based run-time data */
 973                         ch_info->max_power_avg = ch_info->curr_txpow =
 974                             eeprom_ch_info[ch].max_power_avg;
 975                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 976                         ch_info->min_power = 0;
 977
 978                         D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 979                                  " Ad-Hoc %ssupported\n", ch_info->channel,
 980                                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 981                                  CHECK_AND_PRINT_I(VALID),
 982                                  CHECK_AND_PRINT_I(IBSS),
 983                                  CHECK_AND_PRINT_I(ACTIVE),
 984                                  CHECK_AND_PRINT_I(RADAR),
 985                                  CHECK_AND_PRINT_I(WIDE),
 986                                  CHECK_AND_PRINT_I(DFS),
 987                                  eeprom_ch_info[ch].flags,
 988                                  eeprom_ch_info[ch].max_power_avg,
 989                                  ((eeprom_ch_info[ch].
 990                                    flags & EEPROM_CHANNEL_IBSS) &&
 991                                   !(eeprom_ch_info[ch].
 992                                     flags & EEPROM_CHANNEL_RADAR)) ? "" :
 993                                  "not ");
 994
 995                         ch_info++;
 996                 }
 997         }
 998
 999         /* Check if we do have HT40 channels */
1000         if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1001             il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1002                 return 0;
1003
1004         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1005         for (band = 6; band <= 7; band++) {
1006                 enum nl80211_band ieeeband;
1007
1008                 il_init_band_reference(il, band, &eeprom_ch_count,
1009                                        &eeprom_ch_info, &eeprom_ch_idx);
1010
1011                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1012                 ieeeband =
1013                     (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1014
1015                 /* Loop through each band adding each of the channels */
1016                 for (ch = 0; ch < eeprom_ch_count; ch++) {
1017                         /* Set up driver's info for lower half */
1018                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1019                                               &eeprom_ch_info[ch],
1020                                               IEEE80211_CHAN_NO_HT40PLUS);
1021
1022                         /* Set up driver's info for upper half */
1023                         il_mod_ht40_chan_info(il, ieeeband,
1024                                               eeprom_ch_idx[ch] + 4,
1025                                               &eeprom_ch_info[ch],
1026                                               IEEE80211_CHAN_NO_HT40MINUS);
1027                 }
1028         }
1029
1030         return 0;
1031 }
1032 EXPORT_SYMBOL(il_init_channel_map);
1033
1034 /*
1035  * il_free_channel_map - undo allocations in il_init_channel_map
1036  */
1037 void
1038 il_free_channel_map(struct il_priv *il)
1039 {
1040         kfree(il->channel_info);
1041         il->channel_count = 0;
1042 }
1043 EXPORT_SYMBOL(il_free_channel_map);
1044
1045 /**
1046  * il_get_channel_info - Find driver's ilate channel info
1047  *
1048  * Based on band and channel number.
1049  */
1050 const struct il_channel_info *
1051 il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1052                     u16 channel)
1053 {
1054         int i;
1055
1056         switch (band) {
1057         case NL80211_BAND_5GHZ:
1058                 for (i = 14; i < il->channel_count; i++) {
1059                         if (il->channel_info[i].channel == channel)
1060                                 return &il->channel_info[i];
1061                 }
1062                 break;
1063         case NL80211_BAND_2GHZ:
1064                 if (channel >= 1 && channel <= 14)
1065                         return &il->channel_info[channel - 1];
1066                 break;
1067         default:
1068                 BUG();
1069         }
1070
1071         return NULL;
1072 }
1073 EXPORT_SYMBOL(il_get_channel_info);
1074
1075 /*
1076  * Setting power level allows the card to go to sleep when not busy.
1077  *
1078  * We calculate a sleep command based on the required latency, which
1079  * we get from mac80211.
1080  */
1081
1082 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1083                 cpu_to_le32(X0), \
1084                 cpu_to_le32(X1), \
1085                 cpu_to_le32(X2), \
1086                 cpu_to_le32(X3), \
1087                 cpu_to_le32(X4)  \
1088 }
1089
1090 static void
1091 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1092 {
1093         const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1094                 SLP_VEC(2, 2, 4, 6, 0xFF),
1095                 SLP_VEC(2, 4, 7, 10, 10),
1096                 SLP_VEC(4, 7, 10, 10, 0xFF)
1097         };
1098         int i, dtim_period, no_dtim;
1099         u32 max_sleep;
1100         bool skip;
1101
1102         memset(cmd, 0, sizeof(*cmd));
1103
1104         if (il->power_data.pci_pm)
1105                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1106
1107         /* if no Power Save, we are done */
1108         if (il->power_data.ps_disabled)
1109                 return;
1110
1111         cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1112         cmd->keep_alive_seconds = 0;
1113         cmd->debug_flags = 0;
1114         cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1115         cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1116         cmd->keep_alive_beacons = 0;
1117
1118         dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1119
1120         if (dtim_period <= 2) {
1121                 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1122                 no_dtim = 2;
1123         } else if (dtim_period <= 10) {
1124                 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1125                 no_dtim = 2;
1126         } else {
1127                 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1128                 no_dtim = 0;
1129         }
1130
1131         if (dtim_period == 0) {
1132                 dtim_period = 1;
1133                 skip = false;
1134         } else {
1135                 skip = !!no_dtim;
1136         }
1137
1138         if (skip) {
1139                 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1140
1141                 max_sleep = le32_to_cpu(tmp);
1142                 if (max_sleep == 0xFF)
1143                         max_sleep = dtim_period * (skip + 1);
1144                 else if (max_sleep >  dtim_period)
1145                         max_sleep = (max_sleep / dtim_period) * dtim_period;
1146                 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1147         } else {
1148                 max_sleep = dtim_period;
1149                 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1150         }
1151
1152         for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1153                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1154                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1155 }
1156
1157 static int
1158 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1159 {
1160         D_POWER("Sending power/sleep command\n");
1161         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1162         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1163         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1164         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1165                 le32_to_cpu(cmd->sleep_interval[0]),
1166                 le32_to_cpu(cmd->sleep_interval[1]),
1167                 le32_to_cpu(cmd->sleep_interval[2]),
1168                 le32_to_cpu(cmd->sleep_interval[3]),
1169                 le32_to_cpu(cmd->sleep_interval[4]));
1170
1171         return il_send_cmd_pdu(il, C_POWER_TBL,
1172                                sizeof(struct il_powertable_cmd), cmd);
1173 }
1174
1175 static int
1176 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1177 {
1178         int ret;
1179         bool update_chains;
1180
1181         lockdep_assert_held(&il->mutex);
1182
1183         /* Don't update the RX chain when chain noise calibration is running */
1184         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1185             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1186
1187         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1188                 return 0;
1189
1190         if (!il_is_ready_rf(il))
1191                 return -EIO;
1192
1193         /* scan complete use sleep_power_next, need to be updated */
1194         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1195         if (test_bit(S_SCANNING, &il->status) && !force) {
1196                 D_INFO("Defer power set mode while scanning\n");
1197                 return 0;
1198         }
1199
1200         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1201                 set_bit(S_POWER_PMI, &il->status);
1202
1203         ret = il_set_power(il, cmd);
1204         if (!ret) {
1205                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1206                         clear_bit(S_POWER_PMI, &il->status);
1207
1208                 if (il->ops->update_chain_flags && update_chains)
1209                         il->ops->update_chain_flags(il);
1210                 else if (il->ops->update_chain_flags)
1211                         D_POWER("Cannot update the power, chain noise "
1212                                 "calibration running: %d\n",
1213                                 il->chain_noise_data.state);
1214
1215                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1216         } else
1217                 IL_ERR("set power fail, ret = %d", ret);
1218
1219         return ret;
1220 }
1221
1222 int
1223 il_power_update_mode(struct il_priv *il, bool force)
1224 {
1225         struct il_powertable_cmd cmd;
1226
1227         il_build_powertable_cmd(il, &cmd);
1228
1229         return il_power_set_mode(il, &cmd, force);
1230 }
1231 EXPORT_SYMBOL(il_power_update_mode);
1232
1233 /* initialize to default */
1234 void
1235 il_power_initialize(struct il_priv *il)
1236 {
1237         u16 lctl;
1238
1239         pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1240         il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1241
1242         il->power_data.debug_sleep_level_override = -1;
1243
1244         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1245 }
1246 EXPORT_SYMBOL(il_power_initialize);
1247
1248 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1249  * sending probe req.  This should be set long enough to hear probe responses
1250  * from more than one AP.  */
1251 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1252 #define IL_ACTIVE_DWELL_TIME_52    (20)
1253
1254 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1255 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1256
1257 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1258  * Must be set longer than active dwell time.
1259  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1260 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1261 #define IL_PASSIVE_DWELL_TIME_52   (10)
1262 #define IL_PASSIVE_DWELL_BASE      (100)
1263 #define IL_CHANNEL_TUNE_TIME       5
1264
1265 static int
1266 il_send_scan_abort(struct il_priv *il)
1267 {
1268         int ret;
1269         struct il_rx_pkt *pkt;
1270         struct il_host_cmd cmd = {
1271                 .id = C_SCAN_ABORT,
1272                 .flags = CMD_WANT_SKB,
1273         };
1274
1275         /* Exit instantly with error when device is not ready
1276          * to receive scan abort command or it does not perform
1277          * hardware scan currently */
1278         if (!test_bit(S_READY, &il->status) ||
1279             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1280             !test_bit(S_SCAN_HW, &il->status) ||
1281             test_bit(S_FW_ERROR, &il->status) ||
1282             test_bit(S_EXIT_PENDING, &il->status))
1283                 return -EIO;
1284
1285         ret = il_send_cmd_sync(il, &cmd);
1286         if (ret)
1287                 return ret;
1288
1289         pkt = (struct il_rx_pkt *)cmd.reply_page;
1290         if (pkt->u.status != CAN_ABORT_STATUS) {
1291                 /* The scan abort will return 1 for success or
1292                  * 2 for "failure".  A failure condition can be
1293                  * due to simply not being in an active scan which
1294                  * can occur if we send the scan abort before we
1295                  * the microcode has notified us that a scan is
1296                  * completed. */
1297                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1298                 ret = -EIO;
1299         }
1300
1301         il_free_pages(il, cmd.reply_page);
1302         return ret;
1303 }
1304
1305 static void
1306 il_complete_scan(struct il_priv *il, bool aborted)
1307 {
1308         /* check if scan was requested from mac80211 */
1309         if (il->scan_request) {
1310                 D_SCAN("Complete scan in mac80211\n");
1311                 ieee80211_scan_completed(il->hw, aborted);
1312         }
1313
1314         il->scan_vif = NULL;
1315         il->scan_request = NULL;
1316 }
1317
1318 void
1319 il_force_scan_end(struct il_priv *il)
1320 {
1321         lockdep_assert_held(&il->mutex);
1322
1323         if (!test_bit(S_SCANNING, &il->status)) {
1324                 D_SCAN("Forcing scan end while not scanning\n");
1325                 return;
1326         }
1327
1328         D_SCAN("Forcing scan end\n");
1329         clear_bit(S_SCANNING, &il->status);
1330         clear_bit(S_SCAN_HW, &il->status);
1331         clear_bit(S_SCAN_ABORTING, &il->status);
1332         il_complete_scan(il, true);
1333 }
1334
1335 static void
1336 il_do_scan_abort(struct il_priv *il)
1337 {
1338         int ret;
1339
1340         lockdep_assert_held(&il->mutex);
1341
1342         if (!test_bit(S_SCANNING, &il->status)) {
1343                 D_SCAN("Not performing scan to abort\n");
1344                 return;
1345         }
1346
1347         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1348                 D_SCAN("Scan abort in progress\n");
1349                 return;
1350         }
1351
1352         ret = il_send_scan_abort(il);
1353         if (ret) {
1354                 D_SCAN("Send scan abort failed %d\n", ret);
1355                 il_force_scan_end(il);
1356         } else
1357                 D_SCAN("Successfully send scan abort\n");
1358 }
1359
1360 /**
1361  * il_scan_cancel - Cancel any currently executing HW scan
1362  */
1363 int
1364 il_scan_cancel(struct il_priv *il)
1365 {
1366         D_SCAN("Queuing abort scan\n");
1367         queue_work(il->workqueue, &il->abort_scan);
1368         return 0;
1369 }
1370 EXPORT_SYMBOL(il_scan_cancel);
1371
1372 /**
1373  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1374  * @ms: amount of time to wait (in milliseconds) for scan to abort
1375  *
1376  */
1377 int
1378 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1379 {
1380         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1381
1382         lockdep_assert_held(&il->mutex);
1383
1384         D_SCAN("Scan cancel timeout\n");
1385
1386         il_do_scan_abort(il);
1387
1388         while (time_before_eq(jiffies, timeout)) {
1389                 if (!test_bit(S_SCAN_HW, &il->status))
1390                         break;
1391                 msleep(20);
1392         }
1393
1394         return test_bit(S_SCAN_HW, &il->status);
1395 }
1396 EXPORT_SYMBOL(il_scan_cancel_timeout);
1397
1398 /* Service response to C_SCAN (0x80) */
1399 static void
1400 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1401 {
1402 #ifdef CONFIG_IWLEGACY_DEBUG
1403         struct il_rx_pkt *pkt = rxb_addr(rxb);
1404         struct il_scanreq_notification *notif =
1405             (struct il_scanreq_notification *)pkt->u.raw;
1406
1407         D_SCAN("Scan request status = 0x%x\n", notif->status);
1408 #endif
1409 }
1410
1411 /* Service N_SCAN_START (0x82) */
1412 static void
1413 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1414 {
1415         struct il_rx_pkt *pkt = rxb_addr(rxb);
1416         struct il_scanstart_notification *notif =
1417             (struct il_scanstart_notification *)pkt->u.raw;
1418         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1419         D_SCAN("Scan start: " "%d [802.11%s] "
1420                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1421                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1422                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1423 }
1424
1425 /* Service N_SCAN_RESULTS (0x83) */
1426 static void
1427 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1428 {
1429 #ifdef CONFIG_IWLEGACY_DEBUG
1430         struct il_rx_pkt *pkt = rxb_addr(rxb);
1431         struct il_scanresults_notification *notif =
1432             (struct il_scanresults_notification *)pkt->u.raw;
1433
1434         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1435                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1436                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1437                le32_to_cpu(notif->stats[0]),
1438                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1439 #endif
1440 }
1441
1442 /* Service N_SCAN_COMPLETE (0x84) */
1443 static void
1444 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1445 {
1446
1447 #ifdef CONFIG_IWLEGACY_DEBUG
1448         struct il_rx_pkt *pkt = rxb_addr(rxb);
1449         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1450 #endif
1451
1452         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1453                scan_notif->scanned_channels, scan_notif->tsf_low,
1454                scan_notif->tsf_high, scan_notif->status);
1455
1456         /* The HW is no longer scanning */
1457         clear_bit(S_SCAN_HW, &il->status);
1458
1459         D_SCAN("Scan on %sGHz took %dms\n",
1460                (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1461                jiffies_to_msecs(jiffies - il->scan_start));
1462
1463         queue_work(il->workqueue, &il->scan_completed);
1464 }
1465
1466 void
1467 il_setup_rx_scan_handlers(struct il_priv *il)
1468 {
1469         /* scan handlers */
1470         il->handlers[C_SCAN] = il_hdl_scan;
1471         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1472         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1473         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1474 }
1475 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1476
1477 u16
1478 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1479                          u8 n_probes)
1480 {
1481         if (band == NL80211_BAND_5GHZ)
1482                 return IL_ACTIVE_DWELL_TIME_52 +
1483                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1484         else
1485                 return IL_ACTIVE_DWELL_TIME_24 +
1486                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1487 }
1488 EXPORT_SYMBOL(il_get_active_dwell_time);
1489
1490 u16
1491 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1492                           struct ieee80211_vif *vif)
1493 {
1494         u16 value;
1495
1496         u16 passive =
1497             (band ==
1498              NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1499             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1500             IL_PASSIVE_DWELL_TIME_52;
1501
1502         if (il_is_any_associated(il)) {
1503                 /*
1504                  * If we're associated, we clamp the maximum passive
1505                  * dwell time to be 98% of the smallest beacon interval
1506                  * (minus 2 * channel tune time)
1507                  */
1508                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1509                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1510                         value = IL_PASSIVE_DWELL_BASE;
1511                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1512                 passive = min(value, passive);
1513         }
1514
1515         return passive;
1516 }
1517 EXPORT_SYMBOL(il_get_passive_dwell_time);
1518
1519 void
1520 il_init_scan_params(struct il_priv *il)
1521 {
1522         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1523         if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1524                 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1525         if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1526                 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1527 }
1528 EXPORT_SYMBOL(il_init_scan_params);
1529
1530 static int
1531 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1532 {
1533         int ret;
1534
1535         lockdep_assert_held(&il->mutex);
1536
1537         cancel_delayed_work(&il->scan_check);
1538
1539         if (!il_is_ready_rf(il)) {
1540                 IL_WARN("Request scan called when driver not ready.\n");
1541                 return -EIO;
1542         }
1543
1544         if (test_bit(S_SCAN_HW, &il->status)) {
1545                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1546                 return -EBUSY;
1547         }
1548
1549         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1550                 D_SCAN("Scan request while abort pending.\n");
1551                 return -EBUSY;
1552         }
1553
1554         D_SCAN("Starting scan...\n");
1555
1556         set_bit(S_SCANNING, &il->status);
1557         il->scan_start = jiffies;
1558
1559         ret = il->ops->request_scan(il, vif);
1560         if (ret) {
1561                 clear_bit(S_SCANNING, &il->status);
1562                 return ret;
1563         }
1564
1565         queue_delayed_work(il->workqueue, &il->scan_check,
1566                            IL_SCAN_CHECK_WATCHDOG);
1567
1568         return 0;
1569 }
1570
1571 int
1572 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1573                struct ieee80211_scan_request *hw_req)
1574 {
1575         struct cfg80211_scan_request *req = &hw_req->req;
1576         struct il_priv *il = hw->priv;
1577         int ret;
1578
1579         if (req->n_channels == 0) {
1580                 IL_ERR("Can not scan on no channels.\n");
1581                 return -EINVAL;
1582         }
1583
1584         mutex_lock(&il->mutex);
1585         D_MAC80211("enter\n");
1586
1587         if (test_bit(S_SCANNING, &il->status)) {
1588                 D_SCAN("Scan already in progress.\n");
1589                 ret = -EAGAIN;
1590                 goto out_unlock;
1591         }
1592
1593         /* mac80211 will only ask for one band at a time */
1594         il->scan_request = req;
1595         il->scan_vif = vif;
1596         il->scan_band = req->channels[0]->band;
1597
1598         ret = il_scan_initiate(il, vif);
1599
1600 out_unlock:
1601         D_MAC80211("leave ret %d\n", ret);
1602         mutex_unlock(&il->mutex);
1603
1604         return ret;
1605 }
1606 EXPORT_SYMBOL(il_mac_hw_scan);
1607
1608 static void
1609 il_bg_scan_check(struct work_struct *data)
1610 {
1611         struct il_priv *il =
1612             container_of(data, struct il_priv, scan_check.work);
1613
1614         D_SCAN("Scan check work\n");
1615
1616         /* Since we are here firmware does not finish scan and
1617          * most likely is in bad shape, so we don't bother to
1618          * send abort command, just force scan complete to mac80211 */
1619         mutex_lock(&il->mutex);
1620         il_force_scan_end(il);
1621         mutex_unlock(&il->mutex);
1622 }
1623
1624 /**
1625  * il_fill_probe_req - fill in all required fields and IE for probe request
1626  */
1627
1628 u16
1629 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1630                   const u8 *ta, const u8 *ies, int ie_len, int left)
1631 {
1632         int len = 0;
1633         u8 *pos = NULL;
1634
1635         /* Make sure there is enough space for the probe request,
1636          * two mandatory IEs and the data */
1637         left -= 24;
1638         if (left < 0)
1639                 return 0;
1640
1641         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1642         eth_broadcast_addr(frame->da);
1643         memcpy(frame->sa, ta, ETH_ALEN);
1644         eth_broadcast_addr(frame->bssid);
1645         frame->seq_ctrl = 0;
1646
1647         len += 24;
1648
1649         /* ...next IE... */
1650         pos = &frame->u.probe_req.variable[0];
1651
1652         /* fill in our indirect SSID IE */
1653         left -= 2;
1654         if (left < 0)
1655                 return 0;
1656         *pos++ = WLAN_EID_SSID;
1657         *pos++ = 0;
1658
1659         len += 2;
1660
1661         if (WARN_ON(left < ie_len))
1662                 return len;
1663
1664         if (ies && ie_len) {
1665                 memcpy(pos, ies, ie_len);
1666                 len += ie_len;
1667         }
1668
1669         return (u16) len;
1670 }
1671 EXPORT_SYMBOL(il_fill_probe_req);
1672
1673 static void
1674 il_bg_abort_scan(struct work_struct *work)
1675 {
1676         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1677
1678         D_SCAN("Abort scan work\n");
1679
1680         /* We keep scan_check work queued in case when firmware will not
1681          * report back scan completed notification */
1682         mutex_lock(&il->mutex);
1683         il_scan_cancel_timeout(il, 200);
1684         mutex_unlock(&il->mutex);
1685 }
1686
1687 static void
1688 il_bg_scan_completed(struct work_struct *work)
1689 {
1690         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1691         bool aborted;
1692
1693         D_SCAN("Completed scan.\n");
1694
1695         cancel_delayed_work(&il->scan_check);
1696
1697         mutex_lock(&il->mutex);
1698
1699         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1700         if (aborted)
1701                 D_SCAN("Aborted scan completed.\n");
1702
1703         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1704                 D_SCAN("Scan already completed.\n");
1705                 goto out_settings;
1706         }
1707
1708         il_complete_scan(il, aborted);
1709
1710 out_settings:
1711         /* Can we still talk to firmware ? */
1712         if (!il_is_ready_rf(il))
1713                 goto out;
1714
1715         /*
1716          * We do not commit power settings while scan is pending,
1717          * do it now if the settings changed.
1718          */
1719         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1720         il_set_tx_power(il, il->tx_power_next, false);
1721
1722         il->ops->post_scan(il);
1723
1724 out:
1725         mutex_unlock(&il->mutex);
1726 }
1727
1728 void
1729 il_setup_scan_deferred_work(struct il_priv *il)
1730 {
1731         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1732         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1733         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1734 }
1735 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1736
1737 void
1738 il_cancel_scan_deferred_work(struct il_priv *il)
1739 {
1740         cancel_work_sync(&il->abort_scan);
1741         cancel_work_sync(&il->scan_completed);
1742
1743         if (cancel_delayed_work_sync(&il->scan_check)) {
1744                 mutex_lock(&il->mutex);
1745                 il_force_scan_end(il);
1746                 mutex_unlock(&il->mutex);
1747         }
1748 }
1749 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1750
1751 /* il->sta_lock must be held */
1752 static void
1753 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1754 {
1755
1756         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1757                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1758                        sta_id, il->stations[sta_id].sta.sta.addr);
1759
1760         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1761                 D_ASSOC("STA id %u addr %pM already present"
1762                         " in uCode (according to driver)\n", sta_id,
1763                         il->stations[sta_id].sta.sta.addr);
1764         } else {
1765                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1766                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1767                         il->stations[sta_id].sta.sta.addr);
1768         }
1769 }
1770
1771 static int
1772 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1773                         struct il_rx_pkt *pkt, bool sync)
1774 {
1775         u8 sta_id = addsta->sta.sta_id;
1776         unsigned long flags;
1777         int ret = -EIO;
1778
1779         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1780                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1781                 return ret;
1782         }
1783
1784         D_INFO("Processing response for adding station %u\n", sta_id);
1785
1786         spin_lock_irqsave(&il->sta_lock, flags);
1787
1788         switch (pkt->u.add_sta.status) {
1789         case ADD_STA_SUCCESS_MSK:
1790                 D_INFO("C_ADD_STA PASSED\n");
1791                 il_sta_ucode_activate(il, sta_id);
1792                 ret = 0;
1793                 break;
1794         case ADD_STA_NO_ROOM_IN_TBL:
1795                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1796                 break;
1797         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1798                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1799                        sta_id);
1800                 break;
1801         case ADD_STA_MODIFY_NON_EXIST_STA:
1802                 IL_ERR("Attempting to modify non-existing station %d\n",
1803                        sta_id);
1804                 break;
1805         default:
1806                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1807                 break;
1808         }
1809
1810         D_INFO("%s station id %u addr %pM\n",
1811                il->stations[sta_id].sta.mode ==
1812                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1813                il->stations[sta_id].sta.sta.addr);
1814
1815         /*
1816          * XXX: The MAC address in the command buffer is often changed from
1817          * the original sent to the device. That is, the MAC address
1818          * written to the command buffer often is not the same MAC address
1819          * read from the command buffer when the command returns. This
1820          * issue has not yet been resolved and this debugging is left to
1821          * observe the problem.
1822          */
1823         D_INFO("%s station according to cmd buffer %pM\n",
1824                il->stations[sta_id].sta.mode ==
1825                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1826         spin_unlock_irqrestore(&il->sta_lock, flags);
1827
1828         return ret;
1829 }
1830
1831 static void
1832 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1833                     struct il_rx_pkt *pkt)
1834 {
1835         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1836
1837         il_process_add_sta_resp(il, addsta, pkt, false);
1838
1839 }
1840
1841 int
1842 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1843 {
1844         struct il_rx_pkt *pkt = NULL;
1845         int ret = 0;
1846         u8 data[sizeof(*sta)];
1847         struct il_host_cmd cmd = {
1848                 .id = C_ADD_STA,
1849                 .flags = flags,
1850                 .data = data,
1851         };
1852         u8 sta_id __maybe_unused = sta->sta.sta_id;
1853
1854         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1855                flags & CMD_ASYNC ? "a" : "");
1856
1857         if (flags & CMD_ASYNC)
1858                 cmd.callback = il_add_sta_callback;
1859         else {
1860                 cmd.flags |= CMD_WANT_SKB;
1861                 might_sleep();
1862         }
1863
1864         cmd.len = il->ops->build_addsta_hcmd(sta, data);
1865         ret = il_send_cmd(il, &cmd);
1866         if (ret)
1867                 return ret;
1868         if (flags & CMD_ASYNC)
1869                 return 0;
1870
1871         pkt = (struct il_rx_pkt *)cmd.reply_page;
1872         ret = il_process_add_sta_resp(il, sta, pkt, true);
1873
1874         il_free_pages(il, cmd.reply_page);
1875
1876         return ret;
1877 }
1878 EXPORT_SYMBOL(il_send_add_sta);
1879
1880 static void
1881 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1882 {
1883         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1884         __le32 sta_flags;
1885
1886         if (!sta || !sta_ht_inf->ht_supported)
1887                 goto done;
1888
1889         D_ASSOC("spatial multiplexing power save mode: %s\n",
1890                 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1891                 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1892                 "disabled");
1893
1894         sta_flags = il->stations[idx].sta.station_flags;
1895
1896         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1897
1898         switch (sta->smps_mode) {
1899         case IEEE80211_SMPS_STATIC:
1900                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1901                 break;
1902         case IEEE80211_SMPS_DYNAMIC:
1903                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1904                 break;
1905         case IEEE80211_SMPS_OFF:
1906                 break;
1907         default:
1908                 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1909                 break;
1910         }
1911
1912         sta_flags |=
1913             cpu_to_le32((u32) sta_ht_inf->
1914                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1915
1916         sta_flags |=
1917             cpu_to_le32((u32) sta_ht_inf->
1918                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1919
1920         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1921                 sta_flags |= STA_FLG_HT40_EN_MSK;
1922         else
1923                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1924
1925         il->stations[idx].sta.station_flags = sta_flags;
1926 done:
1927         return;
1928 }
1929
1930 /**
1931  * il_prep_station - Prepare station information for addition
1932  *
1933  * should be called with sta_lock held
1934  */
1935 u8
1936 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1937                 struct ieee80211_sta *sta)
1938 {
1939         struct il_station_entry *station;
1940         int i;
1941         u8 sta_id = IL_INVALID_STATION;
1942         u16 rate;
1943
1944         if (is_ap)
1945                 sta_id = IL_AP_ID;
1946         else if (is_broadcast_ether_addr(addr))
1947                 sta_id = il->hw_params.bcast_id;
1948         else
1949                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1950                         if (ether_addr_equal(il->stations[i].sta.sta.addr,
1951                                              addr)) {
1952                                 sta_id = i;
1953                                 break;
1954                         }
1955
1956                         if (!il->stations[i].used &&
1957                             sta_id == IL_INVALID_STATION)
1958                                 sta_id = i;
1959                 }
1960
1961         /*
1962          * These two conditions have the same outcome, but keep them
1963          * separate
1964          */
1965         if (unlikely(sta_id == IL_INVALID_STATION))
1966                 return sta_id;
1967
1968         /*
1969          * uCode is not able to deal with multiple requests to add a
1970          * station. Keep track if one is in progress so that we do not send
1971          * another.
1972          */
1973         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1974                 D_INFO("STA %d already in process of being added.\n", sta_id);
1975                 return sta_id;
1976         }
1977
1978         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1979             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1980             ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1981                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1982                         sta_id, addr);
1983                 return sta_id;
1984         }
1985
1986         station = &il->stations[sta_id];
1987         station->used = IL_STA_DRIVER_ACTIVE;
1988         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1989         il->num_stations++;
1990
1991         /* Set up the C_ADD_STA command to send to device */
1992         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1993         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1994         station->sta.mode = 0;
1995         station->sta.sta.sta_id = sta_id;
1996         station->sta.station_flags = 0;
1997
1998         /*
1999          * OK to call unconditionally, since local stations (IBSS BSSID
2000          * STA and broadcast STA) pass in a NULL sta, and mac80211
2001          * doesn't allow HT IBSS.
2002          */
2003         il_set_ht_add_station(il, sta_id, sta);
2004
2005         /* 3945 only */
2006         rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
2007         /* Turn on both antennas for the station... */
2008         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
2009
2010         return sta_id;
2011
2012 }
2013 EXPORT_SYMBOL_GPL(il_prep_station);
2014
2015 #define STA_WAIT_TIMEOUT (HZ/2)
2016
2017 /**
2018  * il_add_station_common -
2019  */
2020 int
2021 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2022                       struct ieee80211_sta *sta, u8 *sta_id_r)
2023 {
2024         unsigned long flags_spin;
2025         int ret = 0;
2026         u8 sta_id;
2027         struct il_addsta_cmd sta_cmd;
2028
2029         *sta_id_r = 0;
2030         spin_lock_irqsave(&il->sta_lock, flags_spin);
2031         sta_id = il_prep_station(il, addr, is_ap, sta);
2032         if (sta_id == IL_INVALID_STATION) {
2033                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2034                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2035                 return -EINVAL;
2036         }
2037
2038         /*
2039          * uCode is not able to deal with multiple requests to add a
2040          * station. Keep track if one is in progress so that we do not send
2041          * another.
2042          */
2043         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2044                 D_INFO("STA %d already in process of being added.\n", sta_id);
2045                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2046                 return -EEXIST;
2047         }
2048
2049         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2050             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2051                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2052                         sta_id, addr);
2053                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2054                 return -EEXIST;
2055         }
2056
2057         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2058         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2059                sizeof(struct il_addsta_cmd));
2060         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2061
2062         /* Add station to device's station table */
2063         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2064         if (ret) {
2065                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2066                 IL_ERR("Adding station %pM failed.\n",
2067                        il->stations[sta_id].sta.sta.addr);
2068                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2069                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2070                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2071         }
2072         *sta_id_r = sta_id;
2073         return ret;
2074 }
2075 EXPORT_SYMBOL(il_add_station_common);
2076
2077 /**
2078  * il_sta_ucode_deactivate - deactivate ucode status for a station
2079  *
2080  * il->sta_lock must be held
2081  */
2082 static void
2083 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2084 {
2085         /* Ucode must be active and driver must be non active */
2086         if ((il->stations[sta_id].
2087              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2088             IL_STA_UCODE_ACTIVE)
2089                 IL_ERR("removed non active STA %u\n", sta_id);
2090
2091         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2092
2093         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2094         D_ASSOC("Removed STA %u\n", sta_id);
2095 }
2096
2097 static int
2098 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2099                        bool temporary)
2100 {
2101         struct il_rx_pkt *pkt;
2102         int ret;
2103
2104         unsigned long flags_spin;
2105         struct il_rem_sta_cmd rm_sta_cmd;
2106
2107         struct il_host_cmd cmd = {
2108                 .id = C_REM_STA,
2109                 .len = sizeof(struct il_rem_sta_cmd),
2110                 .flags = CMD_SYNC,
2111                 .data = &rm_sta_cmd,
2112         };
2113
2114         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2115         rm_sta_cmd.num_sta = 1;
2116         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2117
2118         cmd.flags |= CMD_WANT_SKB;
2119
2120         ret = il_send_cmd(il, &cmd);
2121
2122         if (ret)
2123                 return ret;
2124
2125         pkt = (struct il_rx_pkt *)cmd.reply_page;
2126         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2127                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2128                 ret = -EIO;
2129         }
2130
2131         if (!ret) {
2132                 switch (pkt->u.rem_sta.status) {
2133                 case REM_STA_SUCCESS_MSK:
2134                         if (!temporary) {
2135                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2136                                 il_sta_ucode_deactivate(il, sta_id);
2137                                 spin_unlock_irqrestore(&il->sta_lock,
2138                                                        flags_spin);
2139                         }
2140                         D_ASSOC("C_REM_STA PASSED\n");
2141                         break;
2142                 default:
2143                         ret = -EIO;
2144                         IL_ERR("C_REM_STA failed\n");
2145                         break;
2146                 }
2147         }
2148         il_free_pages(il, cmd.reply_page);
2149
2150         return ret;
2151 }
2152
2153 /**
2154  * il_remove_station - Remove driver's knowledge of station.
2155  */
2156 int
2157 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2158 {
2159         unsigned long flags;
2160
2161         if (!il_is_ready(il)) {
2162                 D_INFO("Unable to remove station %pM, device not ready.\n",
2163                        addr);
2164                 /*
2165                  * It is typical for stations to be removed when we are
2166                  * going down. Return success since device will be down
2167                  * soon anyway
2168                  */
2169                 return 0;
2170         }
2171
2172         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2173
2174         if (WARN_ON(sta_id == IL_INVALID_STATION))
2175                 return -EINVAL;
2176
2177         spin_lock_irqsave(&il->sta_lock, flags);
2178
2179         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2180                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2181                 goto out_err;
2182         }
2183
2184         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2185                 D_INFO("Removing %pM but non UCODE active\n", addr);
2186                 goto out_err;
2187         }
2188
2189         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2190                 kfree(il->stations[sta_id].lq);
2191                 il->stations[sta_id].lq = NULL;
2192         }
2193
2194         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2195
2196         il->num_stations--;
2197
2198         BUG_ON(il->num_stations < 0);
2199
2200         spin_unlock_irqrestore(&il->sta_lock, flags);
2201
2202         return il_send_remove_station(il, addr, sta_id, false);
2203 out_err:
2204         spin_unlock_irqrestore(&il->sta_lock, flags);
2205         return -EINVAL;
2206 }
2207 EXPORT_SYMBOL_GPL(il_remove_station);
2208
2209 /**
2210  * il_clear_ucode_stations - clear ucode station table bits
2211  *
2212  * This function clears all the bits in the driver indicating
2213  * which stations are active in the ucode. Call when something
2214  * other than explicit station management would cause this in
2215  * the ucode, e.g. unassociated RXON.
2216  */
2217 void
2218 il_clear_ucode_stations(struct il_priv *il)
2219 {
2220         int i;
2221         unsigned long flags_spin;
2222         bool cleared = false;
2223
2224         D_INFO("Clearing ucode stations in driver\n");
2225
2226         spin_lock_irqsave(&il->sta_lock, flags_spin);
2227         for (i = 0; i < il->hw_params.max_stations; i++) {
2228                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2229                         D_INFO("Clearing ucode active for station %d\n", i);
2230                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2231                         cleared = true;
2232                 }
2233         }
2234         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2235
2236         if (!cleared)
2237                 D_INFO("No active stations found to be cleared\n");
2238 }
2239 EXPORT_SYMBOL(il_clear_ucode_stations);
2240
2241 /**
2242  * il_restore_stations() - Restore driver known stations to device
2243  *
2244  * All stations considered active by driver, but not present in ucode, is
2245  * restored.
2246  *
2247  * Function sleeps.
2248  */
2249 void
2250 il_restore_stations(struct il_priv *il)
2251 {
2252         struct il_addsta_cmd sta_cmd;
2253         struct il_link_quality_cmd lq;
2254         unsigned long flags_spin;
2255         int i;
2256         bool found = false;
2257         int ret;
2258         bool send_lq;
2259
2260         if (!il_is_ready(il)) {
2261                 D_INFO("Not ready yet, not restoring any stations.\n");
2262                 return;
2263         }
2264
2265         D_ASSOC("Restoring all known stations ... start.\n");
2266         spin_lock_irqsave(&il->sta_lock, flags_spin);
2267         for (i = 0; i < il->hw_params.max_stations; i++) {
2268                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2269                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2270                         D_ASSOC("Restoring sta %pM\n",
2271                                 il->stations[i].sta.sta.addr);
2272                         il->stations[i].sta.mode = 0;
2273                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2274                         found = true;
2275                 }
2276         }
2277
2278         for (i = 0; i < il->hw_params.max_stations; i++) {
2279                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2280                         memcpy(&sta_cmd, &il->stations[i].sta,
2281                                sizeof(struct il_addsta_cmd));
2282                         send_lq = false;
2283                         if (il->stations[i].lq) {
2284                                 memcpy(&lq, il->stations[i].lq,
2285                                        sizeof(struct il_link_quality_cmd));
2286                                 send_lq = true;
2287                         }
2288                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2289                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2290                         if (ret) {
2291                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2292                                 IL_ERR("Adding station %pM failed.\n",
2293                                        il->stations[i].sta.sta.addr);
2294                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2295                                 il->stations[i].used &=
2296                                     ~IL_STA_UCODE_INPROGRESS;
2297                                 spin_unlock_irqrestore(&il->sta_lock,
2298                                                        flags_spin);
2299                         }
2300                         /*
2301                          * Rate scaling has already been initialized, send
2302                          * current LQ command
2303                          */
2304                         if (send_lq)
2305                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2306                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2307                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2308                 }
2309         }
2310
2311         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2312         if (!found)
2313                 D_INFO("Restoring all known stations"
2314                        " .... no stations to be restored.\n");
2315         else
2316                 D_INFO("Restoring all known stations" " .... complete.\n");
2317 }
2318 EXPORT_SYMBOL(il_restore_stations);
2319
2320 int
2321 il_get_free_ucode_key_idx(struct il_priv *il)
2322 {
2323         int i;
2324
2325         for (i = 0; i < il->sta_key_max_num; i++)
2326                 if (!test_and_set_bit(i, &il->ucode_key_table))
2327                         return i;
2328
2329         return WEP_INVALID_OFFSET;
2330 }
2331 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2332
2333 void
2334 il_dealloc_bcast_stations(struct il_priv *il)
2335 {
2336         unsigned long flags;
2337         int i;
2338
2339         spin_lock_irqsave(&il->sta_lock, flags);
2340         for (i = 0; i < il->hw_params.max_stations; i++) {
2341                 if (!(il->stations[i].used & IL_STA_BCAST))
2342                         continue;
2343
2344                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2345                 il->num_stations--;
2346                 BUG_ON(il->num_stations < 0);
2347                 kfree(il->stations[i].lq);
2348                 il->stations[i].lq = NULL;
2349         }
2350         spin_unlock_irqrestore(&il->sta_lock, flags);
2351 }
2352 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2353
2354 #ifdef CONFIG_IWLEGACY_DEBUG
2355 static void
2356 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2357 {
2358         int i;
2359         D_RATE("lq station id 0x%x\n", lq->sta_id);
2360         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2361                lq->general_params.dual_stream_ant_msk);
2362
2363         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2364                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2365 }
2366 #else
2367 static inline void
2368 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2369 {
2370 }
2371 #endif
2372
2373 /**
2374  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2375  *
2376  * It sometimes happens when a HT rate has been in use and we
2377  * loose connectivity with AP then mac80211 will first tell us that the
2378  * current channel is not HT anymore before removing the station. In such a
2379  * scenario the RXON flags will be updated to indicate we are not
2380  * communicating HT anymore, but the LQ command may still contain HT rates.
2381  * Test for this to prevent driver from sending LQ command between the time
2382  * RXON flags are updated and when LQ command is updated.
2383  */
2384 static bool
2385 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2386 {
2387         int i;
2388
2389         if (il->ht.enabled)
2390                 return true;
2391
2392         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2393         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2394                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2395                         D_INFO("idx %d of LQ expects HT channel\n", i);
2396                         return false;
2397                 }
2398         }
2399         return true;
2400 }
2401
2402 /**
2403  * il_send_lq_cmd() - Send link quality command
2404  * @init: This command is sent as part of station initialization right
2405  *        after station has been added.
2406  *
2407  * The link quality command is sent as the last step of station creation.
2408  * This is the special case in which init is set and we call a callback in
2409  * this case to clear the state indicating that station creation is in
2410  * progress.
2411  */
2412 int
2413 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2414                u8 flags, bool init)
2415 {
2416         int ret = 0;
2417         unsigned long flags_spin;
2418
2419         struct il_host_cmd cmd = {
2420                 .id = C_TX_LINK_QUALITY_CMD,
2421                 .len = sizeof(struct il_link_quality_cmd),
2422                 .flags = flags,
2423                 .data = lq,
2424         };
2425
2426         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2427                 return -EINVAL;
2428
2429         spin_lock_irqsave(&il->sta_lock, flags_spin);
2430         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2431                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2432                 return -EINVAL;
2433         }
2434         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2435
2436         il_dump_lq_cmd(il, lq);
2437         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2438
2439         if (il_is_lq_table_valid(il, lq))
2440                 ret = il_send_cmd(il, &cmd);
2441         else
2442                 ret = -EINVAL;
2443
2444         if (cmd.flags & CMD_ASYNC)
2445                 return ret;
2446
2447         if (init) {
2448                 D_INFO("init LQ command complete,"
2449                        " clearing sta addition status for sta %d\n",
2450                        lq->sta_id);
2451                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2452                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2453                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2454         }
2455         return ret;
2456 }
2457 EXPORT_SYMBOL(il_send_lq_cmd);
2458
2459 int
2460 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2461                   struct ieee80211_sta *sta)
2462 {
2463         struct il_priv *il = hw->priv;
2464         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2465         int ret;
2466
2467         mutex_lock(&il->mutex);
2468         D_MAC80211("enter station %pM\n", sta->addr);
2469
2470         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2471         if (ret)
2472                 IL_ERR("Error removing station %pM\n", sta->addr);
2473
2474         D_MAC80211("leave ret %d\n", ret);
2475         mutex_unlock(&il->mutex);
2476
2477         return ret;
2478 }
2479 EXPORT_SYMBOL(il_mac_sta_remove);
2480
2481 /************************** RX-FUNCTIONS ****************************/
2482 /*
2483  * Rx theory of operation
2484  *
2485  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2486  * each of which point to Receive Buffers to be filled by the NIC.  These get
2487  * used not only for Rx frames, but for any command response or notification
2488  * from the NIC.  The driver and NIC manage the Rx buffers by means
2489  * of idxes into the circular buffer.
2490  *
2491  * Rx Queue Indexes
2492  * The host/firmware share two idx registers for managing the Rx buffers.
2493  *
2494  * The READ idx maps to the first position that the firmware may be writing
2495  * to -- the driver can read up to (but not including) this position and get
2496  * good data.
2497  * The READ idx is managed by the firmware once the card is enabled.
2498  *
2499  * The WRITE idx maps to the last position the driver has read from -- the
2500  * position preceding WRITE is the last slot the firmware can place a packet.
2501  *
2502  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2503  * WRITE = READ.
2504  *
2505  * During initialization, the host sets up the READ queue position to the first
2506  * IDX position, and WRITE to the last (READ - 1 wrapped)
2507  *
2508  * When the firmware places a packet in a buffer, it will advance the READ idx
2509  * and fire the RX interrupt.  The driver can then query the READ idx and
2510  * process as many packets as possible, moving the WRITE idx forward as it
2511  * resets the Rx queue buffers with new memory.
2512  *
2513  * The management in the driver is as follows:
2514  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2515  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2516  *   to replenish the iwl->rxq->rx_free.
2517  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2518  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2519  *   'processed' and 'read' driver idxes as well)
2520  * + A received packet is processed and handed to the kernel network stack,
2521  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2522  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2523  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2524  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2525  *   were enough free buffers and RX_STALLED is set it is cleared.
2526  *
2527  *
2528  * Driver sequence:
2529  *
2530  * il_rx_queue_alloc()   Allocates rx_free
2531  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2532  *                            il_rx_queue_restock
2533  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2534  *                            queue, updates firmware pointers, and updates
2535  *                            the WRITE idx.  If insufficient rx_free buffers
2536  *                            are available, schedules il_rx_replenish
2537  *
2538  * -- enable interrupts --
2539  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2540  *                            READ IDX, detaching the SKB from the pool.
2541  *                            Moves the packet buffer from queue to rx_used.
2542  *                            Calls il_rx_queue_restock to refill any empty
2543  *                            slots.
2544  * ...
2545  *
2546  */
2547
2548 /**
2549  * il_rx_queue_space - Return number of free slots available in queue.
2550  */
2551 int
2552 il_rx_queue_space(const struct il_rx_queue *q)
2553 {
2554         int s = q->read - q->write;
2555         if (s <= 0)
2556                 s += RX_QUEUE_SIZE;
2557         /* keep some buffer to not confuse full and empty queue */
2558         s -= 2;
2559         if (s < 0)
2560                 s = 0;
2561         return s;
2562 }
2563 EXPORT_SYMBOL(il_rx_queue_space);
2564
2565 /**
2566  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2567  */
2568 void
2569 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2570 {
2571         unsigned long flags;
2572         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2573         u32 reg;
2574
2575         spin_lock_irqsave(&q->lock, flags);
2576
2577         if (q->need_update == 0)
2578                 goto exit_unlock;
2579
2580         /* If power-saving is in use, make sure device is awake */
2581         if (test_bit(S_POWER_PMI, &il->status)) {
2582                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2583
2584                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2585                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2586                                reg);
2587                         il_set_bit(il, CSR_GP_CNTRL,
2588                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2589                         goto exit_unlock;
2590                 }
2591
2592                 q->write_actual = (q->write & ~0x7);
2593                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2594
2595                 /* Else device is assumed to be awake */
2596         } else {
2597                 /* Device expects a multiple of 8 */
2598                 q->write_actual = (q->write & ~0x7);
2599                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2600         }
2601
2602         q->need_update = 0;
2603
2604 exit_unlock:
2605         spin_unlock_irqrestore(&q->lock, flags);
2606 }
2607 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2608
2609 int
2610 il_rx_queue_alloc(struct il_priv *il)
2611 {
2612         struct il_rx_queue *rxq = &il->rxq;
2613         struct device *dev = &il->pci_dev->dev;
2614         int i;
2615
2616         spin_lock_init(&rxq->lock);
2617         INIT_LIST_HEAD(&rxq->rx_free);
2618         INIT_LIST_HEAD(&rxq->rx_used);
2619
2620         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2621         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2622                                      GFP_KERNEL);
2623         if (!rxq->bd)
2624                 goto err_bd;
2625
2626         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2627                                           &rxq->rb_stts_dma, GFP_KERNEL);
2628         if (!rxq->rb_stts)
2629                 goto err_rb;
2630
2631         /* Fill the rx_used queue with _all_ of the Rx buffers */
2632         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2633                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2634
2635         /* Set us so that we have processed and used all buffers, but have
2636          * not restocked the Rx queue with fresh buffers */
2637         rxq->read = rxq->write = 0;
2638         rxq->write_actual = 0;
2639         rxq->free_count = 0;
2640         rxq->need_update = 0;
2641         return 0;
2642
2643 err_rb:
2644         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2645                           rxq->bd_dma);
2646 err_bd:
2647         return -ENOMEM;
2648 }
2649 EXPORT_SYMBOL(il_rx_queue_alloc);
2650
2651 void
2652 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2653 {
2654         struct il_rx_pkt *pkt = rxb_addr(rxb);
2655         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2656
2657         if (!report->state) {
2658                 D_11H("Spectrum Measure Notification: Start\n");
2659                 return;
2660         }
2661
2662         memcpy(&il->measure_report, report, sizeof(*report));
2663         il->measurement_status |= MEASUREMENT_READY;
2664 }
2665 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2666
2667 /*
2668  * returns non-zero if packet should be dropped
2669  */
2670 int
2671 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2672                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2673 {
2674         u16 fc = le16_to_cpu(hdr->frame_control);
2675
2676         /*
2677          * All contexts have the same setting here due to it being
2678          * a module parameter, so OK to check any context.
2679          */
2680         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2681                 return 0;
2682
2683         if (!(fc & IEEE80211_FCTL_PROTECTED))
2684                 return 0;
2685
2686         D_RX("decrypt_res:0x%x\n", decrypt_res);
2687         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2688         case RX_RES_STATUS_SEC_TYPE_TKIP:
2689                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2690                  * Decryption will be done in SW. */
2691                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2692                     RX_RES_STATUS_BAD_KEY_TTAK)
2693                         break;
2694
2695         case RX_RES_STATUS_SEC_TYPE_WEP:
2696                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2697                     RX_RES_STATUS_BAD_ICV_MIC) {
2698                         /* bad ICV, the packet is destroyed since the
2699                          * decryption is inplace, drop it */
2700                         D_RX("Packet destroyed\n");
2701                         return -1;
2702                 }
2703         case RX_RES_STATUS_SEC_TYPE_CCMP:
2704                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2705                     RX_RES_STATUS_DECRYPT_OK) {
2706                         D_RX("hw decrypt successfully!!!\n");
2707                         stats->flag |= RX_FLAG_DECRYPTED;
2708                 }
2709                 break;
2710
2711         default:
2712                 break;
2713         }
2714         return 0;
2715 }
2716 EXPORT_SYMBOL(il_set_decrypted_flag);
2717
2718 /**
2719  * il_txq_update_write_ptr - Send new write idx to hardware
2720  */
2721 void
2722 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2723 {
2724         u32 reg = 0;
2725         int txq_id = txq->q.id;
2726
2727         if (txq->need_update == 0)
2728                 return;
2729
2730         /* if we're trying to save power */
2731         if (test_bit(S_POWER_PMI, &il->status)) {
2732                 /* wake up nic if it's powered down ...
2733                  * uCode will wake up, and interrupt us again, so next
2734                  * time we'll skip this part. */
2735                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2736
2737                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2738                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2739                                txq_id, reg);
2740                         il_set_bit(il, CSR_GP_CNTRL,
2741                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2742                         return;
2743                 }
2744
2745                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2746
2747                 /*
2748                  * else not in power-save mode,
2749                  * uCode will never sleep when we're
2750                  * trying to tx (during RFKILL, we're not trying to tx).
2751                  */
2752         } else
2753                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2754         txq->need_update = 0;
2755 }
2756 EXPORT_SYMBOL(il_txq_update_write_ptr);
2757
2758 /**
2759  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2760  */
2761 void
2762 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2763 {
2764         struct il_tx_queue *txq = &il->txq[txq_id];
2765         struct il_queue *q = &txq->q;
2766
2767         if (q->n_bd == 0)
2768                 return;
2769
2770         while (q->write_ptr != q->read_ptr) {
2771                 il->ops->txq_free_tfd(il, txq);
2772                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2773         }
2774 }
2775 EXPORT_SYMBOL(il_tx_queue_unmap);
2776
2777 /**
2778  * il_tx_queue_free - Deallocate DMA queue.
2779  * @txq: Transmit queue to deallocate.
2780  *
2781  * Empty queue by removing and destroying all BD's.
2782  * Free all buffers.
2783  * 0-fill, but do not free "txq" descriptor structure.
2784  */
2785 void
2786 il_tx_queue_free(struct il_priv *il, int txq_id)
2787 {
2788         struct il_tx_queue *txq = &il->txq[txq_id];
2789         struct device *dev = &il->pci_dev->dev;
2790         int i;
2791
2792         il_tx_queue_unmap(il, txq_id);
2793
2794         /* De-alloc array of command/tx buffers */
2795         if (txq->cmd) {
2796                 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2797                         kfree(txq->cmd[i]);
2798         }
2799
2800         /* De-alloc circular buffer of TFDs */
2801         if (txq->q.n_bd)
2802                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2803                                   txq->tfds, txq->q.dma_addr);
2804
2805         /* De-alloc array of per-TFD driver data */
2806         kfree(txq->skbs);
2807         txq->skbs = NULL;
2808
2809         /* deallocate arrays */
2810         kfree(txq->cmd);
2811         kfree(txq->meta);
2812         txq->cmd = NULL;
2813         txq->meta = NULL;
2814
2815         /* 0-fill queue descriptor structure */
2816         memset(txq, 0, sizeof(*txq));
2817 }
2818 EXPORT_SYMBOL(il_tx_queue_free);
2819
2820 /**
2821  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2822  */
2823 void
2824 il_cmd_queue_unmap(struct il_priv *il)
2825 {
2826         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2827         struct il_queue *q = &txq->q;
2828         int i;
2829
2830         if (q->n_bd == 0)
2831                 return;
2832
2833         while (q->read_ptr != q->write_ptr) {
2834                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2835
2836                 if (txq->meta[i].flags & CMD_MAPPED) {
2837                         pci_unmap_single(il->pci_dev,
2838                                          dma_unmap_addr(&txq->meta[i], mapping),
2839                                          dma_unmap_len(&txq->meta[i], len),
2840                                          PCI_DMA_BIDIRECTIONAL);
2841                         txq->meta[i].flags = 0;
2842                 }
2843
2844                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2845         }
2846
2847         i = q->n_win;
2848         if (txq->meta[i].flags & CMD_MAPPED) {
2849                 pci_unmap_single(il->pci_dev,
2850                                  dma_unmap_addr(&txq->meta[i], mapping),
2851                                  dma_unmap_len(&txq->meta[i], len),
2852                                  PCI_DMA_BIDIRECTIONAL);
2853                 txq->meta[i].flags = 0;
2854         }
2855 }
2856 EXPORT_SYMBOL(il_cmd_queue_unmap);
2857
2858 /**
2859  * il_cmd_queue_free - Deallocate DMA queue.
2860  * @txq: Transmit queue to deallocate.
2861  *
2862  * Empty queue by removing and destroying all BD's.
2863  * Free all buffers.
2864  * 0-fill, but do not free "txq" descriptor structure.
2865  */
2866 void
2867 il_cmd_queue_free(struct il_priv *il)
2868 {
2869         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2870         struct device *dev = &il->pci_dev->dev;
2871         int i;
2872
2873         il_cmd_queue_unmap(il);
2874
2875         /* De-alloc array of command/tx buffers */
2876         if (txq->cmd) {
2877                 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2878                         kfree(txq->cmd[i]);
2879         }
2880
2881         /* De-alloc circular buffer of TFDs */
2882         if (txq->q.n_bd)
2883                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2884                                   txq->tfds, txq->q.dma_addr);
2885
2886         /* deallocate arrays */
2887         kfree(txq->cmd);
2888         kfree(txq->meta);
2889         txq->cmd = NULL;
2890         txq->meta = NULL;
2891
2892         /* 0-fill queue descriptor structure */
2893         memset(txq, 0, sizeof(*txq));
2894 }
2895 EXPORT_SYMBOL(il_cmd_queue_free);
2896
2897 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2898  * DMA services
2899  *
2900  * Theory of operation
2901  *
2902  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2903  * of buffer descriptors, each of which points to one or more data buffers for
2904  * the device to read from or fill.  Driver and device exchange status of each
2905  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2906  * entries in each circular buffer, to protect against confusing empty and full
2907  * queue states.
2908  *
2909  * The device reads or writes the data in the queues via the device's several
2910  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2911  *
2912  * For Tx queue, there are low mark and high mark limits. If, after queuing
2913  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2914  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2915  * Tx queue resumed.
2916  *
2917  * See more detailed info in 4965.h.
2918  ***************************************************/
2919
2920 int
2921 il_queue_space(const struct il_queue *q)
2922 {
2923         int s = q->read_ptr - q->write_ptr;
2924
2925         if (q->read_ptr > q->write_ptr)
2926                 s -= q->n_bd;
2927
2928         if (s <= 0)
2929                 s += q->n_win;
2930         /* keep some reserve to not confuse empty and full situations */
2931         s -= 2;
2932         if (s < 0)
2933                 s = 0;
2934         return s;
2935 }
2936 EXPORT_SYMBOL(il_queue_space);
2937
2938
2939 /**
2940  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2941  */
2942 static int
2943 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2944 {
2945         /*
2946          * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2947          * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2948          */
2949         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2950         /* FIXME: remove q->n_bd */
2951         q->n_bd = TFD_QUEUE_SIZE_MAX;
2952
2953         q->n_win = slots;
2954         q->id = id;
2955
2956         /* slots_must be power-of-two size, otherwise
2957          * il_get_cmd_idx is broken. */
2958         BUG_ON(!is_power_of_2(slots));
2959
2960         q->low_mark = q->n_win / 4;
2961         if (q->low_mark < 4)
2962                 q->low_mark = 4;
2963
2964         q->high_mark = q->n_win / 8;
2965         if (q->high_mark < 2)
2966                 q->high_mark = 2;
2967
2968         q->write_ptr = q->read_ptr = 0;
2969
2970         return 0;
2971 }
2972
2973 /**
2974  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2975  */
2976 static int
2977 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2978 {
2979         struct device *dev = &il->pci_dev->dev;
2980         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2981
2982         /* Driver ilate data, only for Tx (not command) queues,
2983          * not shared with device. */
2984         if (id != il->cmd_queue) {
2985                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2986                                     sizeof(struct sk_buff *),
2987                                     GFP_KERNEL);
2988                 if (!txq->skbs) {
2989                         IL_ERR("Fail to alloc skbs\n");
2990                         goto error;
2991                 }
2992         } else
2993                 txq->skbs = NULL;
2994
2995         /* Circular buffer of transmit frame descriptors (TFDs),
2996          * shared with device */
2997         txq->tfds =
2998             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2999         if (!txq->tfds)
3000                 goto error;
3001
3002         txq->q.id = id;
3003
3004         return 0;
3005
3006 error:
3007         kfree(txq->skbs);
3008         txq->skbs = NULL;
3009
3010         return -ENOMEM;
3011 }
3012
3013 /**
3014  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3015  */
3016 int
3017 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3018 {
3019         int i, len, ret;
3020         int slots, actual_slots;
3021         struct il_tx_queue *txq = &il->txq[txq_id];
3022
3023         /*
3024          * Alloc buffer array for commands (Tx or other types of commands).
3025          * For the command queue (#4/#9), allocate command space + one big
3026          * command for scan, since scan command is very huge; the system will
3027          * not have two scans at the same time, so only one is needed.
3028          * For normal Tx queues (all other queues), no super-size command
3029          * space is needed.
3030          */
3031         if (txq_id == il->cmd_queue) {
3032                 slots = TFD_CMD_SLOTS;
3033                 actual_slots = slots + 1;
3034         } else {
3035                 slots = TFD_TX_CMD_SLOTS;
3036                 actual_slots = slots;
3037         }
3038
3039         txq->meta =
3040             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
3041         txq->cmd =
3042             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
3043
3044         if (!txq->meta || !txq->cmd)
3045                 goto out_free_arrays;
3046
3047         len = sizeof(struct il_device_cmd);
3048         for (i = 0; i < actual_slots; i++) {
3049                 /* only happens for cmd queue */
3050                 if (i == slots)
3051                         len = IL_MAX_CMD_SIZE;
3052
3053                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3054                 if (!txq->cmd[i])
3055                         goto err;
3056         }
3057
3058         /* Alloc driver data array and TFD circular buffer */
3059         ret = il_tx_queue_alloc(il, txq, txq_id);
3060         if (ret)
3061                 goto err;
3062
3063         txq->need_update = 0;
3064
3065         /*
3066          * For the default queues 0-3, set up the swq_id
3067          * already -- all others need to get one later
3068          * (if they need one at all).
3069          */
3070         if (txq_id < 4)
3071                 il_set_swq_id(txq, txq_id, txq_id);
3072
3073         /* Initialize queue's high/low-water marks, and head/tail idxes */
3074         il_queue_init(il, &txq->q, slots, txq_id);
3075
3076         /* Tell device where to find queue */
3077         il->ops->txq_init(il, txq);
3078
3079         return 0;
3080 err:
3081         for (i = 0; i < actual_slots; i++)
3082                 kfree(txq->cmd[i]);
3083 out_free_arrays:
3084         kfree(txq->meta);
3085         txq->meta = NULL;
3086         kfree(txq->cmd);
3087         txq->cmd = NULL;
3088
3089         return -ENOMEM;
3090 }
3091 EXPORT_SYMBOL(il_tx_queue_init);
3092
3093 void
3094 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3095 {
3096         int slots, actual_slots;
3097         struct il_tx_queue *txq = &il->txq[txq_id];
3098
3099         if (txq_id == il->cmd_queue) {
3100                 slots = TFD_CMD_SLOTS;
3101                 actual_slots = TFD_CMD_SLOTS + 1;
3102         } else {
3103                 slots = TFD_TX_CMD_SLOTS;
3104                 actual_slots = TFD_TX_CMD_SLOTS;
3105         }
3106
3107         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3108         txq->need_update = 0;
3109
3110         /* Initialize queue's high/low-water marks, and head/tail idxes */
3111         il_queue_init(il, &txq->q, slots, txq_id);
3112
3113         /* Tell device where to find queue */
3114         il->ops->txq_init(il, txq);
3115 }
3116 EXPORT_SYMBOL(il_tx_queue_reset);
3117
3118 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3119
3120 /**
3121  * il_enqueue_hcmd - enqueue a uCode command
3122  * @il: device ilate data point
3123  * @cmd: a point to the ucode command structure
3124  *
3125  * The function returns < 0 values to indicate the operation is
3126  * failed. On success, it turns the idx (> 0) of command in the
3127  * command queue.
3128  */
3129 int
3130 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3131 {
3132         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3133         struct il_queue *q = &txq->q;
3134         struct il_device_cmd *out_cmd;
3135         struct il_cmd_meta *out_meta;
3136         dma_addr_t phys_addr;
3137         unsigned long flags;
3138         int len;
3139         u32 idx;
3140         u16 fix_size;
3141
3142         cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3143         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3144
3145         /* If any of the command structures end up being larger than
3146          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3147          * we will need to increase the size of the TFD entries
3148          * Also, check to see if command buffer should not exceed the size
3149          * of device_cmd and max_cmd_size. */
3150         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3151                !(cmd->flags & CMD_SIZE_HUGE));
3152         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3153
3154         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3155                 IL_WARN("Not sending command - %s KILL\n",
3156                         il_is_rfkill(il) ? "RF" : "CT");
3157                 return -EIO;
3158         }
3159
3160         spin_lock_irqsave(&il->hcmd_lock, flags);
3161
3162         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3163                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3164
3165                 IL_ERR("Restarting adapter due to command queue full\n");
3166                 queue_work(il->workqueue, &il->restart);
3167                 return -ENOSPC;
3168         }
3169
3170         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3171         out_cmd = txq->cmd[idx];
3172         out_meta = &txq->meta[idx];
3173
3174         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3175                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3176                 return -ENOSPC;
3177         }
3178
3179         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3180         out_meta->flags = cmd->flags | CMD_MAPPED;
3181         if (cmd->flags & CMD_WANT_SKB)
3182                 out_meta->source = cmd;
3183         if (cmd->flags & CMD_ASYNC)
3184                 out_meta->callback = cmd->callback;
3185
3186         out_cmd->hdr.cmd = cmd->id;
3187         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3188
3189         /* At this point, the out_cmd now has all of the incoming cmd
3190          * information */
3191
3192         out_cmd->hdr.flags = 0;
3193         out_cmd->hdr.sequence =
3194             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3195         if (cmd->flags & CMD_SIZE_HUGE)
3196                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3197         len = sizeof(struct il_device_cmd);
3198         if (idx == TFD_CMD_SLOTS)
3199                 len = IL_MAX_CMD_SIZE;
3200
3201 #ifdef CONFIG_IWLEGACY_DEBUG
3202         switch (out_cmd->hdr.cmd) {
3203         case C_TX_LINK_QUALITY_CMD:
3204         case C_SENSITIVITY:
3205                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3206                           "%d bytes at %d[%d]:%d\n",
3207                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3208                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3209                           q->write_ptr, idx, il->cmd_queue);
3210                 break;
3211         default:
3212                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3213                      "%d bytes at %d[%d]:%d\n",
3214                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3215                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3216                      idx, il->cmd_queue);
3217         }
3218 #endif
3219
3220         phys_addr =
3221             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3222                            PCI_DMA_BIDIRECTIONAL);
3223         if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3224                 idx = -ENOMEM;
3225                 goto out;
3226         }
3227         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3228         dma_unmap_len_set(out_meta, len, fix_size);
3229
3230         txq->need_update = 1;
3231
3232         if (il->ops->txq_update_byte_cnt_tbl)
3233                 /* Set up entry in queue's byte count circular buffer */
3234                 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3235
3236         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3237                                             U32_PAD(cmd->len));
3238
3239         /* Increment and update queue's write idx */
3240         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3241         il_txq_update_write_ptr(il, txq);
3242
3243 out:
3244         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3245         return idx;
3246 }
3247
3248 /**
3249  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3250  *
3251  * When FW advances 'R' idx, all entries between old and new 'R' idx
3252  * need to be reclaimed. As result, some free space forms.  If there is
3253  * enough free space (> low mark), wake the stack that feeds us.
3254  */
3255 static void
3256 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3257 {
3258         struct il_tx_queue *txq = &il->txq[txq_id];
3259         struct il_queue *q = &txq->q;
3260         int nfreed = 0;
3261
3262         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3263                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3264                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3265                        q->write_ptr, q->read_ptr);
3266                 return;
3267         }
3268
3269         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3270              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3271
3272                 if (nfreed++ > 0) {
3273                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3274                                q->write_ptr, q->read_ptr);
3275                         queue_work(il->workqueue, &il->restart);
3276                 }
3277
3278         }
3279 }
3280
3281 /**
3282  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3283  * @rxb: Rx buffer to reclaim
3284  *
3285  * If an Rx buffer has an async callback associated with it the callback
3286  * will be executed.  The attached skb (if present) will only be freed
3287  * if the callback returns 1
3288  */
3289 void
3290 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3291 {
3292         struct il_rx_pkt *pkt = rxb_addr(rxb);
3293         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3294         int txq_id = SEQ_TO_QUEUE(sequence);
3295         int idx = SEQ_TO_IDX(sequence);
3296         int cmd_idx;
3297         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3298         struct il_device_cmd *cmd;
3299         struct il_cmd_meta *meta;
3300         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3301         unsigned long flags;
3302
3303         /* If a Tx command is being handled and it isn't in the actual
3304          * command queue then there a command routing bug has been introduced
3305          * in the queue management code. */
3306         if (WARN
3307             (txq_id != il->cmd_queue,
3308              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3309              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3310              il->txq[il->cmd_queue].q.write_ptr)) {
3311                 il_print_hex_error(il, pkt, 32);
3312                 return;
3313         }
3314
3315         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3316         cmd = txq->cmd[cmd_idx];
3317         meta = &txq->meta[cmd_idx];
3318
3319         txq->time_stamp = jiffies;
3320
3321         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3322                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3323
3324         /* Input error checking is done when commands are added to queue. */
3325         if (meta->flags & CMD_WANT_SKB) {
3326                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3327                 rxb->page = NULL;
3328         } else if (meta->callback)
3329                 meta->callback(il, cmd, pkt);
3330
3331         spin_lock_irqsave(&il->hcmd_lock, flags);
3332
3333         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3334
3335         if (!(meta->flags & CMD_ASYNC)) {
3336                 clear_bit(S_HCMD_ACTIVE, &il->status);
3337                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3338                        il_get_cmd_string(cmd->hdr.cmd));
3339                 wake_up(&il->wait_command_queue);
3340         }
3341
3342         /* Mark as unmapped */
3343         meta->flags = 0;
3344
3345         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3346 }
3347 EXPORT_SYMBOL(il_tx_cmd_complete);
3348
3349 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3350 MODULE_VERSION(IWLWIFI_VERSION);
3351 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3352 MODULE_LICENSE("GPL");
3353
3354 /*
3355  * set bt_coex_active to true, uCode will do kill/defer
3356  * every time the priority line is asserted (BT is sending signals on the
3357  * priority line in the PCIx).
3358  * set bt_coex_active to false, uCode will ignore the BT activity and
3359  * perform the normal operation
3360  *
3361  * User might experience transmit issue on some platform due to WiFi/BT
3362  * co-exist problem. The possible behaviors are:
3363  *   Able to scan and finding all the available AP
3364  *   Not able to associate with any AP
3365  * On those platforms, WiFi communication can be restored by set
3366  * "bt_coex_active" module parameter to "false"
3367  *
3368  * default: bt_coex_active = true (BT_COEX_ENABLE)
3369  */
3370 static bool bt_coex_active = true;
3371 module_param(bt_coex_active, bool, S_IRUGO);
3372 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3373
3374 u32 il_debug_level;
3375 EXPORT_SYMBOL(il_debug_level);
3376
3377 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3378 EXPORT_SYMBOL(il_bcast_addr);
3379
3380 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3381 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3382 static void
3383 il_init_ht_hw_capab(const struct il_priv *il,
3384                     struct ieee80211_sta_ht_cap *ht_info,
3385                     enum nl80211_band band)
3386 {
3387         u16 max_bit_rate = 0;
3388         u8 rx_chains_num = il->hw_params.rx_chains_num;
3389         u8 tx_chains_num = il->hw_params.tx_chains_num;
3390
3391         ht_info->cap = 0;
3392         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3393
3394         ht_info->ht_supported = true;
3395
3396         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3397         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3398         if (il->hw_params.ht40_channel & BIT(band)) {
3399                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3400                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3401                 ht_info->mcs.rx_mask[4] = 0x01;
3402                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3403         }
3404
3405         if (il->cfg->mod_params->amsdu_size_8K)
3406                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3407
3408         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3409         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3410
3411         ht_info->mcs.rx_mask[0] = 0xFF;
3412         if (rx_chains_num >= 2)
3413                 ht_info->mcs.rx_mask[1] = 0xFF;
3414         if (rx_chains_num >= 3)
3415                 ht_info->mcs.rx_mask[2] = 0xFF;
3416
3417         /* Highest supported Rx data rate */
3418         max_bit_rate *= rx_chains_num;
3419         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3420         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3421
3422         /* Tx MCS capabilities */
3423         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3424         if (tx_chains_num != rx_chains_num) {
3425                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3426                 ht_info->mcs.tx_params |=
3427                     ((tx_chains_num -
3428                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3429         }
3430 }
3431
3432 /**
3433  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3434  */
3435 int
3436 il_init_geos(struct il_priv *il)
3437 {
3438         struct il_channel_info *ch;
3439         struct ieee80211_supported_band *sband;
3440         struct ieee80211_channel *channels;
3441         struct ieee80211_channel *geo_ch;
3442         struct ieee80211_rate *rates;
3443         int i = 0;
3444         s8 max_tx_power = 0;
3445
3446         if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3447             il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3448                 D_INFO("Geography modes already initialized.\n");
3449                 set_bit(S_GEO_CONFIGURED, &il->status);
3450                 return 0;
3451         }
3452
3453         channels =
3454             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3455                     GFP_KERNEL);
3456         if (!channels)
3457                 return -ENOMEM;
3458
3459         rates =
3460             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3461                     GFP_KERNEL);
3462         if (!rates) {
3463                 kfree(channels);
3464                 return -ENOMEM;
3465         }
3466
3467         /* 5.2GHz channels start after the 2.4GHz channels */
3468         sband = &il->bands[NL80211_BAND_5GHZ];
3469         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3470         /* just OFDM */
3471         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3472         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3473
3474         if (il->cfg->sku & IL_SKU_N)
3475                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3476
3477         sband = &il->bands[NL80211_BAND_2GHZ];
3478         sband->channels = channels;
3479         /* OFDM & CCK */
3480         sband->bitrates = rates;
3481         sband->n_bitrates = RATE_COUNT_LEGACY;
3482
3483         if (il->cfg->sku & IL_SKU_N)
3484                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3485
3486         il->ieee_channels = channels;
3487         il->ieee_rates = rates;
3488
3489         for (i = 0; i < il->channel_count; i++) {
3490                 ch = &il->channel_info[i];
3491
3492                 if (!il_is_channel_valid(ch))
3493                         continue;
3494
3495                 sband = &il->bands[ch->band];
3496
3497                 geo_ch = &sband->channels[sband->n_channels++];
3498
3499                 geo_ch->center_freq =
3500                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3501                 geo_ch->max_power = ch->max_power_avg;
3502                 geo_ch->max_antenna_gain = 0xff;
3503                 geo_ch->hw_value = ch->channel;
3504
3505                 if (il_is_channel_valid(ch)) {
3506                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3507                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3508
3509                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3510                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3511
3512                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3513                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3514
3515                         geo_ch->flags |= ch->ht40_extension_channel;
3516
3517                         if (ch->max_power_avg > max_tx_power)
3518                                 max_tx_power = ch->max_power_avg;
3519                 } else {
3520                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3521                 }
3522
3523                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3524                        geo_ch->center_freq,
3525                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3526                        geo_ch->
3527                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3528                        geo_ch->flags);
3529         }
3530
3531         il->tx_power_device_lmt = max_tx_power;
3532         il->tx_power_user_lmt = max_tx_power;
3533         il->tx_power_next = max_tx_power;
3534
3535         if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3536             (il->cfg->sku & IL_SKU_A)) {
3537                 IL_INFO("Incorrectly detected BG card as ABG. "
3538                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3539                         il->pci_dev->device, il->pci_dev->subsystem_device);
3540                 il->cfg->sku &= ~IL_SKU_A;
3541         }
3542
3543         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3544                 il->bands[NL80211_BAND_2GHZ].n_channels,
3545                 il->bands[NL80211_BAND_5GHZ].n_channels);
3546
3547         set_bit(S_GEO_CONFIGURED, &il->status);
3548
3549         return 0;
3550 }
3551 EXPORT_SYMBOL(il_init_geos);
3552
3553 /*
3554  * il_free_geos - undo allocations in il_init_geos
3555  */
3556 void
3557 il_free_geos(struct il_priv *il)
3558 {
3559         kfree(il->ieee_channels);
3560         kfree(il->ieee_rates);
3561         clear_bit(S_GEO_CONFIGURED, &il->status);
3562 }
3563 EXPORT_SYMBOL(il_free_geos);
3564
3565 static bool
3566 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3567                         u16 channel, u8 extension_chan_offset)
3568 {
3569         const struct il_channel_info *ch_info;
3570
3571         ch_info = il_get_channel_info(il, band, channel);
3572         if (!il_is_channel_valid(ch_info))
3573                 return false;
3574
3575         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3576                 return !(ch_info->
3577                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3578         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3579                 return !(ch_info->
3580                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3581
3582         return false;
3583 }
3584
3585 bool
3586 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3587 {
3588         if (!il->ht.enabled || !il->ht.is_40mhz)
3589                 return false;
3590
3591         /*
3592          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3593          * the bit will not set if it is pure 40MHz case
3594          */
3595         if (ht_cap && !ht_cap->ht_supported)
3596                 return false;
3597
3598 #ifdef CONFIG_IWLEGACY_DEBUGFS
3599         if (il->disable_ht40)
3600                 return false;
3601 #endif
3602
3603         return il_is_channel_extension(il, il->band,
3604                                        le16_to_cpu(il->staging.channel),
3605                                        il->ht.extension_chan_offset);
3606 }
3607 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3608
3609 static u16 noinline
3610 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3611 {
3612         u16 new_val;
3613         u16 beacon_factor;
3614
3615         /*
3616          * If mac80211 hasn't given us a beacon interval, program
3617          * the default into the device.
3618          */
3619         if (!beacon_val)
3620                 return DEFAULT_BEACON_INTERVAL;
3621
3622         /*
3623          * If the beacon interval we obtained from the peer
3624          * is too large, we'll have to wake up more often
3625          * (and in IBSS case, we'll beacon too much)
3626          *
3627          * For example, if max_beacon_val is 4096, and the
3628          * requested beacon interval is 7000, we'll have to
3629          * use 3500 to be able to wake up on the beacons.
3630          *
3631          * This could badly influence beacon detection stats.
3632          */
3633
3634         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3635         new_val = beacon_val / beacon_factor;
3636
3637         if (!new_val)
3638                 new_val = max_beacon_val;
3639
3640         return new_val;
3641 }
3642
3643 int
3644 il_send_rxon_timing(struct il_priv *il)
3645 {
3646         u64 tsf;
3647         s32 interval_tm, rem;
3648         struct ieee80211_conf *conf = NULL;
3649         u16 beacon_int;
3650         struct ieee80211_vif *vif = il->vif;
3651
3652         conf = &il->hw->conf;
3653
3654         lockdep_assert_held(&il->mutex);
3655
3656         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3657
3658         il->timing.timestamp = cpu_to_le64(il->timestamp);
3659         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3660
3661         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3662
3663         /*
3664          * TODO: For IBSS we need to get atim_win from mac80211,
3665          *       for now just always use 0
3666          */
3667         il->timing.atim_win = 0;
3668
3669         beacon_int =
3670             il_adjust_beacon_interval(beacon_int,
3671                                       il->hw_params.max_beacon_itrvl *
3672                                       TIME_UNIT);
3673         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3674
3675         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3676         interval_tm = beacon_int * TIME_UNIT;
3677         rem = do_div(tsf, interval_tm);
3678         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3679
3680         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3681
3682         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3683                 le16_to_cpu(il->timing.beacon_interval),
3684                 le32_to_cpu(il->timing.beacon_init_val),
3685                 le16_to_cpu(il->timing.atim_win));
3686
3687         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3688                                &il->timing);
3689 }
3690 EXPORT_SYMBOL(il_send_rxon_timing);
3691
3692 void
3693 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3694 {
3695         struct il_rxon_cmd *rxon = &il->staging;
3696
3697         if (hw_decrypt)
3698                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3699         else
3700                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3701
3702 }
3703 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3704
3705 /* validate RXON structure is valid */
3706 int
3707 il_check_rxon_cmd(struct il_priv *il)
3708 {
3709         struct il_rxon_cmd *rxon = &il->staging;
3710         bool error = false;
3711
3712         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3713                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3714                         IL_WARN("check 2.4G: wrong narrow\n");
3715                         error = true;
3716                 }
3717                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3718                         IL_WARN("check 2.4G: wrong radar\n");
3719                         error = true;
3720                 }
3721         } else {
3722                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3723                         IL_WARN("check 5.2G: not short slot!\n");
3724                         error = true;
3725                 }
3726                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3727                         IL_WARN("check 5.2G: CCK!\n");
3728                         error = true;
3729                 }
3730         }
3731         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3732                 IL_WARN("mac/bssid mcast!\n");
3733                 error = true;
3734         }
3735
3736         /* make sure basic rates 6Mbps and 1Mbps are supported */
3737         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3738             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3739                 IL_WARN("neither 1 nor 6 are basic\n");
3740                 error = true;
3741         }
3742
3743         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3744                 IL_WARN("aid > 2007\n");
3745                 error = true;
3746         }
3747
3748         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3749             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3750                 IL_WARN("CCK and short slot\n");
3751                 error = true;
3752         }
3753
3754         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3755             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3756                 IL_WARN("CCK and auto detect");
3757                 error = true;
3758         }
3759
3760         if ((rxon->
3761              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3762             RXON_FLG_TGG_PROTECT_MSK) {
3763                 IL_WARN("TGg but no auto-detect\n");
3764                 error = true;
3765         }
3766
3767         if (error)
3768                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3769
3770         if (error) {
3771                 IL_ERR("Invalid RXON\n");
3772                 return -EINVAL;
3773         }
3774         return 0;
3775 }
3776 EXPORT_SYMBOL(il_check_rxon_cmd);
3777
3778 /**
3779  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3780  * @il: staging_rxon is compared to active_rxon
3781  *
3782  * If the RXON structure is changing enough to require a new tune,
3783  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3784  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3785  */
3786 int
3787 il_full_rxon_required(struct il_priv *il)
3788 {
3789         const struct il_rxon_cmd *staging = &il->staging;
3790         const struct il_rxon_cmd *active = &il->active;
3791
3792 #define CHK(cond)                                                       \
3793         if ((cond)) {                                                   \
3794                 D_INFO("need full RXON - " #cond "\n"); \
3795                 return 1;                                               \
3796         }
3797
3798 #define CHK_NEQ(c1, c2)                                         \
3799         if ((c1) != (c2)) {                                     \
3800                 D_INFO("need full RXON - "      \
3801                                #c1 " != " #c2 " - %d != %d\n",  \
3802                                (c1), (c2));                     \
3803                 return 1;                                       \
3804         }
3805
3806         /* These items are only settable from the full RXON command */
3807         CHK(!il_is_associated(il));
3808         CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3809         CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3810         CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3811                                      active->wlap_bssid_addr));
3812         CHK_NEQ(staging->dev_type, active->dev_type);
3813         CHK_NEQ(staging->channel, active->channel);
3814         CHK_NEQ(staging->air_propagation, active->air_propagation);
3815         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3816                 active->ofdm_ht_single_stream_basic_rates);
3817         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3818                 active->ofdm_ht_dual_stream_basic_rates);
3819         CHK_NEQ(staging->assoc_id, active->assoc_id);
3820
3821         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3822          * be updated with the RXON_ASSOC command -- however only some
3823          * flag transitions are allowed using RXON_ASSOC */
3824
3825         /* Check if we are not switching bands */
3826         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3827                 active->flags & RXON_FLG_BAND_24G_MSK);
3828
3829         /* Check if we are switching association toggle */
3830         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3831                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3832
3833 #undef CHK
3834 #undef CHK_NEQ
3835
3836         return 0;
3837 }
3838 EXPORT_SYMBOL(il_full_rxon_required);
3839
3840 u8
3841 il_get_lowest_plcp(struct il_priv *il)
3842 {
3843         /*
3844          * Assign the lowest rate -- should really get this from
3845          * the beacon skb from mac80211.
3846          */
3847         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3848                 return RATE_1M_PLCP;
3849         else
3850                 return RATE_6M_PLCP;
3851 }
3852 EXPORT_SYMBOL(il_get_lowest_plcp);
3853
3854 static void
3855 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3856 {
3857         struct il_rxon_cmd *rxon = &il->staging;
3858
3859         if (!il->ht.enabled) {
3860                 rxon->flags &=
3861                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3862                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3863                       | RXON_FLG_HT_PROT_MSK);
3864                 return;
3865         }
3866
3867         rxon->flags |=
3868             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3869
3870         /* Set up channel bandwidth:
3871          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3872         /* clear the HT channel mode before set the mode */
3873         rxon->flags &=
3874             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3875         if (il_is_ht40_tx_allowed(il, NULL)) {
3876                 /* pure ht40 */
3877                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3878                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3879                         /* Note: control channel is opposite of extension channel */
3880                         switch (il->ht.extension_chan_offset) {
3881                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3882                                 rxon->flags &=
3883                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3884                                 break;
3885                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3886                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3887                                 break;
3888                         }
3889                 } else {
3890                         /* Note: control channel is opposite of extension channel */
3891                         switch (il->ht.extension_chan_offset) {
3892                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3893                                 rxon->flags &=
3894                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3895                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3896                                 break;
3897                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3898                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3899                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3900                                 break;
3901                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3902                         default:
3903                                 /* channel location only valid if in Mixed mode */
3904                                 IL_ERR("invalid extension channel offset\n");
3905                                 break;
3906                         }
3907                 }
3908         } else {
3909                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3910         }
3911
3912         if (il->ops->set_rxon_chain)
3913                 il->ops->set_rxon_chain(il);
3914
3915         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3916                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3917                 il->ht.protection, il->ht.extension_chan_offset);
3918 }
3919
3920 void
3921 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3922 {
3923         _il_set_rxon_ht(il, ht_conf);
3924 }
3925 EXPORT_SYMBOL(il_set_rxon_ht);
3926
3927 /* Return valid, unused, channel for a passive scan to reset the RF */
3928 u8
3929 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3930 {
3931         const struct il_channel_info *ch_info;
3932         int i;
3933         u8 channel = 0;
3934         u8 min, max;
3935
3936         if (band == NL80211_BAND_5GHZ) {
3937                 min = 14;
3938                 max = il->channel_count;
3939         } else {
3940                 min = 0;
3941                 max = 14;
3942         }
3943
3944         for (i = min; i < max; i++) {
3945                 channel = il->channel_info[i].channel;
3946                 if (channel == le16_to_cpu(il->staging.channel))
3947                         continue;
3948
3949                 ch_info = il_get_channel_info(il, band, channel);
3950                 if (il_is_channel_valid(ch_info))
3951                         break;
3952         }
3953
3954         return channel;
3955 }
3956 EXPORT_SYMBOL(il_get_single_channel_number);
3957
3958 /**
3959  * il_set_rxon_channel - Set the band and channel values in staging RXON
3960  * @ch: requested channel as a pointer to struct ieee80211_channel
3961
3962  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3963  * in the staging RXON flag structure based on the ch->band
3964  */
3965 int
3966 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3967 {
3968         enum nl80211_band band = ch->band;
3969         u16 channel = ch->hw_value;
3970
3971         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3972                 return 0;
3973
3974         il->staging.channel = cpu_to_le16(channel);
3975         if (band == NL80211_BAND_5GHZ)
3976                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3977         else
3978                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3979
3980         il->band = band;
3981
3982         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3983
3984         return 0;
3985 }
3986 EXPORT_SYMBOL(il_set_rxon_channel);
3987
3988 void
3989 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3990                       struct ieee80211_vif *vif)
3991 {
3992         if (band == NL80211_BAND_5GHZ) {
3993                 il->staging.flags &=
3994                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3995                       RXON_FLG_CCK_MSK);
3996                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3997         } else {
3998                 /* Copied from il_post_associate() */
3999                 if (vif && vif->bss_conf.use_short_slot)
4000                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
4001                 else
4002                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4003
4004                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
4005                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
4006                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
4007         }
4008 }
4009 EXPORT_SYMBOL(il_set_flags_for_band);
4010
4011 /*
4012  * initialize rxon structure with default values from eeprom
4013  */
4014 void
4015 il_connection_init_rx_config(struct il_priv *il)
4016 {
4017         const struct il_channel_info *ch_info;
4018
4019         memset(&il->staging, 0, sizeof(il->staging));
4020
4021         switch (il->iw_mode) {
4022         case NL80211_IFTYPE_UNSPECIFIED:
4023                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4024                 break;
4025         case NL80211_IFTYPE_STATION:
4026                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4027                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4028                 break;
4029         case NL80211_IFTYPE_ADHOC:
4030                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4031                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4032                 il->staging.filter_flags =
4033                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4034                 break;
4035         default:
4036                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4037                 return;
4038         }
4039
4040 #if 0
4041         /* TODO:  Figure out when short_preamble would be set and cache from
4042          * that */
4043         if (!hw_to_local(il->hw)->short_preamble)
4044                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4045         else
4046                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4047 #endif
4048
4049         ch_info =
4050             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4051
4052         if (!ch_info)
4053                 ch_info = &il->channel_info[0];
4054
4055         il->staging.channel = cpu_to_le16(ch_info->channel);
4056         il->band = ch_info->band;
4057
4058         il_set_flags_for_band(il, il->band, il->vif);
4059
4060         il->staging.ofdm_basic_rates =
4061             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4062         il->staging.cck_basic_rates =
4063             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4064
4065         /* clear both MIX and PURE40 mode flag */
4066         il->staging.flags &=
4067             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4068         if (il->vif)
4069                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4070
4071         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4072         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4073 }
4074 EXPORT_SYMBOL(il_connection_init_rx_config);
4075
4076 void
4077 il_set_rate(struct il_priv *il)
4078 {
4079         const struct ieee80211_supported_band *hw = NULL;
4080         struct ieee80211_rate *rate;
4081         int i;
4082
4083         hw = il_get_hw_mode(il, il->band);
4084         if (!hw) {
4085                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4086                 return;
4087         }
4088
4089         il->active_rate = 0;
4090
4091         for (i = 0; i < hw->n_bitrates; i++) {
4092                 rate = &(hw->bitrates[i]);
4093                 if (rate->hw_value < RATE_COUNT_LEGACY)
4094                         il->active_rate |= (1 << rate->hw_value);
4095         }
4096
4097         D_RATE("Set active_rate = %0x\n", il->active_rate);
4098
4099         il->staging.cck_basic_rates =
4100             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4101
4102         il->staging.ofdm_basic_rates =
4103             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4104 }
4105 EXPORT_SYMBOL(il_set_rate);
4106
4107 void
4108 il_chswitch_done(struct il_priv *il, bool is_success)
4109 {
4110         if (test_bit(S_EXIT_PENDING, &il->status))
4111                 return;
4112
4113         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4114                 ieee80211_chswitch_done(il->vif, is_success);
4115 }
4116 EXPORT_SYMBOL(il_chswitch_done);
4117
4118 void
4119 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4120 {
4121         struct il_rx_pkt *pkt = rxb_addr(rxb);
4122         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4123         struct il_rxon_cmd *rxon = (void *)&il->active;
4124
4125         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4126                 return;
4127
4128         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4129                 rxon->channel = csa->channel;
4130                 il->staging.channel = csa->channel;
4131                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4132                 il_chswitch_done(il, true);
4133         } else {
4134                 IL_ERR("CSA notif (fail) : channel %d\n",
4135                        le16_to_cpu(csa->channel));
4136                 il_chswitch_done(il, false);
4137         }
4138 }
4139 EXPORT_SYMBOL(il_hdl_csa);
4140
4141 #ifdef CONFIG_IWLEGACY_DEBUG
4142 void
4143 il_print_rx_config_cmd(struct il_priv *il)
4144 {
4145         struct il_rxon_cmd *rxon = &il->staging;
4146
4147         D_RADIO("RX CONFIG:\n");
4148         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4149         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4150         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4151         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4152         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4153         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4154         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4155         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4156         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4157         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4158 }
4159 EXPORT_SYMBOL(il_print_rx_config_cmd);
4160 #endif
4161 /**
4162  * il_irq_handle_error - called for HW or SW error interrupt from card
4163  */
4164 void
4165 il_irq_handle_error(struct il_priv *il)
4166 {
4167         /* Set the FW error flag -- cleared on il_down */
4168         set_bit(S_FW_ERROR, &il->status);
4169
4170         /* Cancel currently queued command. */
4171         clear_bit(S_HCMD_ACTIVE, &il->status);
4172
4173         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4174
4175         il->ops->dump_nic_error_log(il);
4176         if (il->ops->dump_fh)
4177                 il->ops->dump_fh(il, NULL, false);
4178 #ifdef CONFIG_IWLEGACY_DEBUG
4179         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4180                 il_print_rx_config_cmd(il);
4181 #endif
4182
4183         wake_up(&il->wait_command_queue);
4184
4185         /* Keep the restart process from trying to send host
4186          * commands by clearing the INIT status bit */
4187         clear_bit(S_READY, &il->status);
4188
4189         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4190                 IL_DBG(IL_DL_FW_ERRORS,
4191                        "Restarting adapter due to uCode error.\n");
4192
4193                 if (il->cfg->mod_params->restart_fw)
4194                         queue_work(il->workqueue, &il->restart);
4195         }
4196 }
4197 EXPORT_SYMBOL(il_irq_handle_error);
4198
4199 static int
4200 _il_apm_stop_master(struct il_priv *il)
4201 {
4202         int ret = 0;
4203
4204         /* stop device's busmaster DMA activity */
4205         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4206
4207         ret =
4208             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4209                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4210         if (ret < 0)
4211                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4212
4213         D_INFO("stop master\n");
4214
4215         return ret;
4216 }
4217
4218 void
4219 _il_apm_stop(struct il_priv *il)
4220 {
4221         lockdep_assert_held(&il->reg_lock);
4222
4223         D_INFO("Stop card, put in low power state\n");
4224
4225         /* Stop device's DMA activity */
4226         _il_apm_stop_master(il);
4227
4228         /* Reset the entire device */
4229         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4230
4231         udelay(10);
4232
4233         /*
4234          * Clear "initialization complete" bit to move adapter from
4235          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4236          */
4237         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4238 }
4239 EXPORT_SYMBOL(_il_apm_stop);
4240
4241 void
4242 il_apm_stop(struct il_priv *il)
4243 {
4244         unsigned long flags;
4245
4246         spin_lock_irqsave(&il->reg_lock, flags);
4247         _il_apm_stop(il);
4248         spin_unlock_irqrestore(&il->reg_lock, flags);
4249 }
4250 EXPORT_SYMBOL(il_apm_stop);
4251
4252 /*
4253  * Start up NIC's basic functionality after it has been reset
4254  * (e.g. after platform boot, or shutdown via il_apm_stop())
4255  * NOTE:  This does not load uCode nor start the embedded processor
4256  */
4257 int
4258 il_apm_init(struct il_priv *il)
4259 {
4260         int ret = 0;
4261         u16 lctl;
4262
4263         D_INFO("Init card's basic functions\n");
4264
4265         /*
4266          * Use "set_bit" below rather than "write", to preserve any hardware
4267          * bits already set by default after reset.
4268          */
4269
4270         /* Disable L0S exit timer (platform NMI Work/Around) */
4271         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4272                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4273
4274         /*
4275          * Disable L0s without affecting L1;
4276          *  don't wait for ICH L0s (ICH bug W/A)
4277          */
4278         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4279                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4280
4281         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4282         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4283
4284         /*
4285          * Enable HAP INTA (interrupt from management bus) to
4286          * wake device's PCI Express link L1a -> L0s
4287          * NOTE:  This is no-op for 3945 (non-existent bit)
4288          */
4289         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4290                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4291
4292         /*
4293          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4294          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4295          * If so (likely), disable L0S, so device moves directly L0->L1;
4296          *    costs negligible amount of power savings.
4297          * If not (unlikely), enable L0S, so there is at least some
4298          *    power savings, even without L1.
4299          */
4300         if (il->cfg->set_l0s) {
4301                 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4302                 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4303                         /* L1-ASPM enabled; disable(!) L0S  */
4304                         il_set_bit(il, CSR_GIO_REG,
4305                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4306                         D_POWER("L1 Enabled; Disabling L0S\n");
4307                 } else {
4308                         /* L1-ASPM disabled; enable(!) L0S */
4309                         il_clear_bit(il, CSR_GIO_REG,
4310                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4311                         D_POWER("L1 Disabled; Enabling L0S\n");
4312                 }
4313         }
4314
4315         /* Configure analog phase-lock-loop before activating to D0A */
4316         if (il->cfg->pll_cfg_val)
4317                 il_set_bit(il, CSR_ANA_PLL_CFG,
4318                            il->cfg->pll_cfg_val);
4319
4320         /*
4321          * Set "initialization complete" bit to move adapter from
4322          * D0U* --> D0A* (powered-up active) state.
4323          */
4324         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4325
4326         /*
4327          * Wait for clock stabilization; once stabilized, access to
4328          * device-internal resources is supported, e.g. il_wr_prph()
4329          * and accesses to uCode SRAM.
4330          */
4331         ret =
4332             _il_poll_bit(il, CSR_GP_CNTRL,
4333                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4334                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4335         if (ret < 0) {
4336                 D_INFO("Failed to init the card\n");
4337                 goto out;
4338         }
4339
4340         /*
4341          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4342          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4343          *
4344          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4345          * do not disable clocks.  This preserves any hardware bits already
4346          * set by default in "CLK_CTRL_REG" after reset.
4347          */
4348         if (il->cfg->use_bsm)
4349                 il_wr_prph(il, APMG_CLK_EN_REG,
4350                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4351         else
4352                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4353         udelay(20);
4354
4355         /* Disable L1-Active */
4356         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4357                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4358
4359 out:
4360         return ret;
4361 }
4362 EXPORT_SYMBOL(il_apm_init);
4363
4364 int
4365 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4366 {
4367         int ret;
4368         s8 prev_tx_power;
4369         bool defer;
4370
4371         lockdep_assert_held(&il->mutex);
4372
4373         if (il->tx_power_user_lmt == tx_power && !force)
4374                 return 0;
4375
4376         if (!il->ops->send_tx_power)
4377                 return -EOPNOTSUPP;
4378
4379         /* 0 dBm mean 1 milliwatt */
4380         if (tx_power < 0) {
4381                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4382                 return -EINVAL;
4383         }
4384
4385         if (tx_power > il->tx_power_device_lmt) {
4386                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4387                         tx_power, il->tx_power_device_lmt);
4388                 return -EINVAL;
4389         }
4390
4391         if (!il_is_ready_rf(il))
4392                 return -EIO;
4393
4394         /* scan complete and commit_rxon use tx_power_next value,
4395          * it always need to be updated for newest request */
4396         il->tx_power_next = tx_power;
4397
4398         /* do not set tx power when scanning or channel changing */
4399         defer = test_bit(S_SCANNING, &il->status) ||
4400             memcmp(&il->active, &il->staging, sizeof(il->staging));
4401         if (defer && !force) {
4402                 D_INFO("Deferring tx power set\n");
4403                 return 0;
4404         }
4405
4406         prev_tx_power = il->tx_power_user_lmt;
4407         il->tx_power_user_lmt = tx_power;
4408
4409         ret = il->ops->send_tx_power(il);
4410
4411         /* if fail to set tx_power, restore the orig. tx power */
4412         if (ret) {
4413                 il->tx_power_user_lmt = prev_tx_power;
4414                 il->tx_power_next = prev_tx_power;
4415         }
4416         return ret;
4417 }
4418 EXPORT_SYMBOL(il_set_tx_power);
4419
4420 void
4421 il_send_bt_config(struct il_priv *il)
4422 {
4423         struct il_bt_cmd bt_cmd = {
4424                 .lead_time = BT_LEAD_TIME_DEF,
4425                 .max_kill = BT_MAX_KILL_DEF,
4426                 .kill_ack_mask = 0,
4427                 .kill_cts_mask = 0,
4428         };
4429
4430         if (!bt_coex_active)
4431                 bt_cmd.flags = BT_COEX_DISABLE;
4432         else
4433                 bt_cmd.flags = BT_COEX_ENABLE;
4434
4435         D_INFO("BT coex %s\n",
4436                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4437
4438         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4439                 IL_ERR("failed to send BT Coex Config\n");
4440 }
4441 EXPORT_SYMBOL(il_send_bt_config);
4442
4443 int
4444 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4445 {
4446         struct il_stats_cmd stats_cmd = {
4447                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4448         };
4449
4450         if (flags & CMD_ASYNC)
4451                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4452                                              &stats_cmd, NULL);
4453         else
4454                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4455                                        &stats_cmd);
4456 }
4457 EXPORT_SYMBOL(il_send_stats_request);
4458
4459 void
4460 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4461 {
4462 #ifdef CONFIG_IWLEGACY_DEBUG
4463         struct il_rx_pkt *pkt = rxb_addr(rxb);
4464         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4465         D_RX("sleep mode: %d, src: %d\n",
4466              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4467 #endif
4468 }
4469 EXPORT_SYMBOL(il_hdl_pm_sleep);
4470
4471 void
4472 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4473 {
4474         struct il_rx_pkt *pkt = rxb_addr(rxb);
4475         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4476         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4477                 il_get_cmd_string(pkt->hdr.cmd));
4478         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4479 }
4480 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4481
4482 void
4483 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4484 {
4485         struct il_rx_pkt *pkt = rxb_addr(rxb);
4486
4487         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4488                "seq 0x%04X ser 0x%08X\n",
4489                le32_to_cpu(pkt->u.err_resp.error_type),
4490                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4491                pkt->u.err_resp.cmd_id,
4492                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4493                le32_to_cpu(pkt->u.err_resp.error_info));
4494 }
4495 EXPORT_SYMBOL(il_hdl_error);
4496
4497 void
4498 il_clear_isr_stats(struct il_priv *il)
4499 {
4500         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4501 }
4502
4503 int
4504 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4505                const struct ieee80211_tx_queue_params *params)
4506 {
4507         struct il_priv *il = hw->priv;
4508         unsigned long flags;
4509         int q;
4510
4511         D_MAC80211("enter\n");
4512
4513         if (!il_is_ready_rf(il)) {
4514                 D_MAC80211("leave - RF not ready\n");
4515                 return -EIO;
4516         }
4517
4518         if (queue >= AC_NUM) {
4519                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4520                 return 0;
4521         }
4522
4523         q = AC_NUM - 1 - queue;
4524
4525         spin_lock_irqsave(&il->lock, flags);
4526
4527         il->qos_data.def_qos_parm.ac[q].cw_min =
4528             cpu_to_le16(params->cw_min);
4529         il->qos_data.def_qos_parm.ac[q].cw_max =
4530             cpu_to_le16(params->cw_max);
4531         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4532         il->qos_data.def_qos_parm.ac[q].edca_txop =
4533             cpu_to_le16((params->txop * 32));
4534
4535         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4536
4537         spin_unlock_irqrestore(&il->lock, flags);
4538
4539         D_MAC80211("leave\n");
4540         return 0;
4541 }
4542 EXPORT_SYMBOL(il_mac_conf_tx);
4543
4544 int
4545 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4546 {
4547         struct il_priv *il = hw->priv;
4548         int ret;
4549
4550         D_MAC80211("enter\n");
4551
4552         ret = (il->ibss_manager == IL_IBSS_MANAGER);
4553
4554         D_MAC80211("leave ret %d\n", ret);
4555         return ret;
4556 }
4557 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4558
4559 static int
4560 il_set_mode(struct il_priv *il)
4561 {
4562         il_connection_init_rx_config(il);
4563
4564         if (il->ops->set_rxon_chain)
4565                 il->ops->set_rxon_chain(il);
4566
4567         return il_commit_rxon(il);
4568 }
4569
4570 int
4571 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4572 {
4573         struct il_priv *il = hw->priv;
4574         int err;
4575         bool reset;
4576
4577         mutex_lock(&il->mutex);
4578         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4579
4580         if (!il_is_ready_rf(il)) {
4581                 IL_WARN("Try to add interface when device not ready\n");
4582                 err = -EINVAL;
4583                 goto out;
4584         }
4585
4586         /*
4587          * We do not support multiple virtual interfaces, but on hardware reset
4588          * we have to add the same interface again.
4589          */
4590         reset = (il->vif == vif);
4591         if (il->vif && !reset) {
4592                 err = -EOPNOTSUPP;
4593                 goto out;
4594         }
4595
4596         il->vif = vif;
4597         il->iw_mode = vif->type;
4598
4599         err = il_set_mode(il);
4600         if (err) {
4601                 IL_WARN("Fail to set mode %d\n", vif->type);
4602                 if (!reset) {
4603                         il->vif = NULL;
4604                         il->iw_mode = NL80211_IFTYPE_STATION;
4605                 }
4606         }
4607
4608 out:
4609         D_MAC80211("leave err %d\n", err);
4610         mutex_unlock(&il->mutex);
4611
4612         return err;
4613 }
4614 EXPORT_SYMBOL(il_mac_add_interface);
4615
4616 static void
4617 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4618 {
4619         lockdep_assert_held(&il->mutex);
4620
4621         if (il->scan_vif == vif) {
4622                 il_scan_cancel_timeout(il, 200);
4623                 il_force_scan_end(il);
4624         }
4625
4626         il_set_mode(il);
4627 }
4628
4629 void
4630 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4631 {
4632         struct il_priv *il = hw->priv;
4633
4634         mutex_lock(&il->mutex);
4635         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4636
4637         WARN_ON(il->vif != vif);
4638         il->vif = NULL;
4639         il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4640         il_teardown_interface(il, vif);
4641         eth_zero_addr(il->bssid);
4642
4643         D_MAC80211("leave\n");
4644         mutex_unlock(&il->mutex);
4645 }
4646 EXPORT_SYMBOL(il_mac_remove_interface);
4647
4648 int
4649 il_alloc_txq_mem(struct il_priv *il)
4650 {
4651         if (!il->txq)
4652                 il->txq =
4653                     kzalloc(sizeof(struct il_tx_queue) *
4654                             il->cfg->num_of_queues, GFP_KERNEL);
4655         if (!il->txq) {
4656                 IL_ERR("Not enough memory for txq\n");
4657                 return -ENOMEM;
4658         }
4659         return 0;
4660 }
4661 EXPORT_SYMBOL(il_alloc_txq_mem);
4662
4663 void
4664 il_free_txq_mem(struct il_priv *il)
4665 {
4666         kfree(il->txq);
4667         il->txq = NULL;
4668 }
4669 EXPORT_SYMBOL(il_free_txq_mem);
4670
4671 int
4672 il_force_reset(struct il_priv *il, bool external)
4673 {
4674         struct il_force_reset *force_reset;
4675
4676         if (test_bit(S_EXIT_PENDING, &il->status))
4677                 return -EINVAL;
4678
4679         force_reset = &il->force_reset;
4680         force_reset->reset_request_count++;
4681         if (!external) {
4682                 if (force_reset->last_force_reset_jiffies &&
4683                     time_after(force_reset->last_force_reset_jiffies +
4684                                force_reset->reset_duration, jiffies)) {
4685                         D_INFO("force reset rejected\n");
4686                         force_reset->reset_reject_count++;
4687                         return -EAGAIN;
4688                 }
4689         }
4690         force_reset->reset_success_count++;
4691         force_reset->last_force_reset_jiffies = jiffies;
4692
4693         /*
4694          * if the request is from external(ex: debugfs),
4695          * then always perform the request in regardless the module
4696          * parameter setting
4697          * if the request is from internal (uCode error or driver
4698          * detect failure), then fw_restart module parameter
4699          * need to be check before performing firmware reload
4700          */
4701
4702         if (!external && !il->cfg->mod_params->restart_fw) {
4703                 D_INFO("Cancel firmware reload based on "
4704                        "module parameter setting\n");
4705                 return 0;
4706         }
4707
4708         IL_ERR("On demand firmware reload\n");
4709
4710         /* Set the FW error flag -- cleared on il_down */
4711         set_bit(S_FW_ERROR, &il->status);
4712         wake_up(&il->wait_command_queue);
4713         /*
4714          * Keep the restart process from trying to send host
4715          * commands by clearing the INIT status bit
4716          */
4717         clear_bit(S_READY, &il->status);
4718         queue_work(il->workqueue, &il->restart);
4719
4720         return 0;
4721 }
4722 EXPORT_SYMBOL(il_force_reset);
4723
4724 int
4725 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4726                         enum nl80211_iftype newtype, bool newp2p)
4727 {
4728         struct il_priv *il = hw->priv;
4729         int err;
4730
4731         mutex_lock(&il->mutex);
4732         D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4733                     vif->type, vif->addr, newtype, newp2p);
4734
4735         if (newp2p) {
4736                 err = -EOPNOTSUPP;
4737                 goto out;
4738         }
4739
4740         if (!il->vif || !il_is_ready_rf(il)) {
4741                 /*
4742                  * Huh? But wait ... this can maybe happen when
4743                  * we're in the middle of a firmware restart!
4744                  */
4745                 err = -EBUSY;
4746                 goto out;
4747         }
4748
4749         /* success */
4750         vif->type = newtype;
4751         vif->p2p = false;
4752         il->iw_mode = newtype;
4753         il_teardown_interface(il, vif);
4754         err = 0;
4755
4756 out:
4757         D_MAC80211("leave err %d\n", err);
4758         mutex_unlock(&il->mutex);
4759
4760         return err;
4761 }
4762 EXPORT_SYMBOL(il_mac_change_interface);
4763
4764 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4765                   u32 queues, bool drop)
4766 {
4767         struct il_priv *il = hw->priv;
4768         unsigned long timeout = jiffies + msecs_to_jiffies(500);
4769         int i;
4770
4771         mutex_lock(&il->mutex);
4772         D_MAC80211("enter\n");
4773
4774         if (il->txq == NULL)
4775                 goto out;
4776
4777         for (i = 0; i < il->hw_params.max_txq_num; i++) {
4778                 struct il_queue *q;
4779
4780                 if (i == il->cmd_queue)
4781                         continue;
4782
4783                 q = &il->txq[i].q;
4784                 if (q->read_ptr == q->write_ptr)
4785                         continue;
4786
4787                 if (time_after(jiffies, timeout)) {
4788                         IL_ERR("Failed to flush queue %d\n", q->id);
4789                         break;
4790                 }
4791
4792                 msleep(20);
4793         }
4794 out:
4795         D_MAC80211("leave\n");
4796         mutex_unlock(&il->mutex);
4797 }
4798 EXPORT_SYMBOL(il_mac_flush);
4799
4800 /*
4801  * On every watchdog tick we check (latest) time stamp. If it does not
4802  * change during timeout period and queue is not empty we reset firmware.
4803  */
4804 static int
4805 il_check_stuck_queue(struct il_priv *il, int cnt)
4806 {
4807         struct il_tx_queue *txq = &il->txq[cnt];
4808         struct il_queue *q = &txq->q;
4809         unsigned long timeout;
4810         unsigned long now = jiffies;
4811         int ret;
4812
4813         if (q->read_ptr == q->write_ptr) {
4814                 txq->time_stamp = now;
4815                 return 0;
4816         }
4817
4818         timeout =
4819             txq->time_stamp +
4820             msecs_to_jiffies(il->cfg->wd_timeout);
4821
4822         if (time_after(now, timeout)) {
4823                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4824                        jiffies_to_msecs(now - txq->time_stamp));
4825                 ret = il_force_reset(il, false);
4826                 return (ret == -EAGAIN) ? 0 : 1;
4827         }
4828
4829         return 0;
4830 }
4831
4832 /*
4833  * Making watchdog tick be a quarter of timeout assure we will
4834  * discover the queue hung between timeout and 1.25*timeout
4835  */
4836 #define IL_WD_TICK(timeout) ((timeout) / 4)
4837
4838 /*
4839  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4840  * we reset the firmware. If everything is fine just rearm the timer.
4841  */
4842 void
4843 il_bg_watchdog(unsigned long data)
4844 {
4845         struct il_priv *il = (struct il_priv *)data;
4846         int cnt;
4847         unsigned long timeout;
4848
4849         if (test_bit(S_EXIT_PENDING, &il->status))
4850                 return;
4851
4852         timeout = il->cfg->wd_timeout;
4853         if (timeout == 0)
4854                 return;
4855
4856         /* monitor and check for stuck cmd queue */
4857         if (il_check_stuck_queue(il, il->cmd_queue))
4858                 return;
4859
4860         /* monitor and check for other stuck queues */
4861         for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4862                 /* skip as we already checked the command queue */
4863                 if (cnt == il->cmd_queue)
4864                         continue;
4865                 if (il_check_stuck_queue(il, cnt))
4866                         return;
4867         }
4868
4869         mod_timer(&il->watchdog,
4870                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4871 }
4872 EXPORT_SYMBOL(il_bg_watchdog);
4873
4874 void
4875 il_setup_watchdog(struct il_priv *il)
4876 {
4877         unsigned int timeout = il->cfg->wd_timeout;
4878
4879         if (timeout)
4880                 mod_timer(&il->watchdog,
4881                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4882         else
4883                 del_timer(&il->watchdog);
4884 }
4885 EXPORT_SYMBOL(il_setup_watchdog);
4886
4887 /*
4888  * extended beacon time format
4889  * time in usec will be changed into a 32-bit value in extended:internal format
4890  * the extended part is the beacon counts
4891  * the internal part is the time in usec within one beacon interval
4892  */
4893 u32
4894 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4895 {
4896         u32 quot;
4897         u32 rem;
4898         u32 interval = beacon_interval * TIME_UNIT;
4899
4900         if (!interval || !usec)
4901                 return 0;
4902
4903         quot =
4904             (usec /
4905              interval) & (il_beacon_time_mask_high(il,
4906                                                    il->hw_params.
4907                                                    beacon_time_tsf_bits) >> il->
4908                           hw_params.beacon_time_tsf_bits);
4909         rem =
4910             (usec % interval) & il_beacon_time_mask_low(il,
4911                                                         il->hw_params.
4912                                                         beacon_time_tsf_bits);
4913
4914         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4915 }
4916 EXPORT_SYMBOL(il_usecs_to_beacons);
4917
4918 /* base is usually what we get from ucode with each received frame,
4919  * the same as HW timer counter counting down
4920  */
4921 __le32
4922 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4923                    u32 beacon_interval)
4924 {
4925         u32 base_low = base & il_beacon_time_mask_low(il,
4926                                                       il->hw_params.
4927                                                       beacon_time_tsf_bits);
4928         u32 addon_low = addon & il_beacon_time_mask_low(il,
4929                                                         il->hw_params.
4930                                                         beacon_time_tsf_bits);
4931         u32 interval = beacon_interval * TIME_UNIT;
4932         u32 res = (base & il_beacon_time_mask_high(il,
4933                                                    il->hw_params.
4934                                                    beacon_time_tsf_bits)) +
4935             (addon & il_beacon_time_mask_high(il,
4936                                               il->hw_params.
4937                                               beacon_time_tsf_bits));
4938
4939         if (base_low > addon_low)
4940                 res += base_low - addon_low;
4941         else if (base_low < addon_low) {
4942                 res += interval + base_low - addon_low;
4943                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4944         } else
4945                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4946
4947         return cpu_to_le32(res);
4948 }
4949 EXPORT_SYMBOL(il_add_beacon_time);
4950
4951 #ifdef CONFIG_PM_SLEEP
4952
4953 static int
4954 il_pci_suspend(struct device *device)
4955 {
4956         struct pci_dev *pdev = to_pci_dev(device);
4957         struct il_priv *il = pci_get_drvdata(pdev);
4958
4959         /*
4960          * This function is called when system goes into suspend state
4961          * mac80211 will call il_mac_stop() from the mac80211 suspend function
4962          * first but since il_mac_stop() has no knowledge of who the caller is,
4963          * it will not call apm_ops.stop() to stop the DMA operation.
4964          * Calling apm_ops.stop here to make sure we stop the DMA.
4965          */
4966         il_apm_stop(il);
4967
4968         return 0;
4969 }
4970
4971 static int
4972 il_pci_resume(struct device *device)
4973 {
4974         struct pci_dev *pdev = to_pci_dev(device);
4975         struct il_priv *il = pci_get_drvdata(pdev);
4976         bool hw_rfkill = false;
4977
4978         /*
4979          * We disable the RETRY_TIMEOUT register (0x41) to keep
4980          * PCI Tx retries from interfering with C3 CPU state.
4981          */
4982         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4983
4984         il_enable_interrupts(il);
4985
4986         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4987                 hw_rfkill = true;
4988
4989         if (hw_rfkill)
4990                 set_bit(S_RFKILL, &il->status);
4991         else
4992                 clear_bit(S_RFKILL, &il->status);
4993
4994         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4995
4996         return 0;
4997 }
4998
4999 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
5000 EXPORT_SYMBOL(il_pm_ops);
5001
5002 #endif /* CONFIG_PM_SLEEP */
5003
5004 static void
5005 il_update_qos(struct il_priv *il)
5006 {
5007         if (test_bit(S_EXIT_PENDING, &il->status))
5008                 return;
5009
5010         il->qos_data.def_qos_parm.qos_flags = 0;
5011
5012         if (il->qos_data.qos_active)
5013                 il->qos_data.def_qos_parm.qos_flags |=
5014                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5015
5016         if (il->ht.enabled)
5017                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5018
5019         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5020               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5021
5022         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5023                               &il->qos_data.def_qos_parm, NULL);
5024 }
5025
5026 /**
5027  * il_mac_config - mac80211 config callback
5028  */
5029 int
5030 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5031 {
5032         struct il_priv *il = hw->priv;
5033         const struct il_channel_info *ch_info;
5034         struct ieee80211_conf *conf = &hw->conf;
5035         struct ieee80211_channel *channel = conf->chandef.chan;
5036         struct il_ht_config *ht_conf = &il->current_ht_config;
5037         unsigned long flags = 0;
5038         int ret = 0;
5039         u16 ch;
5040         int scan_active = 0;
5041         bool ht_changed = false;
5042
5043         mutex_lock(&il->mutex);
5044         D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5045                    changed);
5046
5047         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5048                 scan_active = 1;
5049                 D_MAC80211("scan active\n");
5050         }
5051
5052         if (changed &
5053             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5054                 /* mac80211 uses static for non-HT which is what we want */
5055                 il->current_ht_config.smps = conf->smps_mode;
5056
5057                 /*
5058                  * Recalculate chain counts.
5059                  *
5060                  * If monitor mode is enabled then mac80211 will
5061                  * set up the SM PS mode to OFF if an HT channel is
5062                  * configured.
5063                  */
5064                 if (il->ops->set_rxon_chain)
5065                         il->ops->set_rxon_chain(il);
5066         }
5067
5068         /* during scanning mac80211 will delay channel setting until
5069          * scan finish with changed = 0
5070          */
5071         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5072
5073                 if (scan_active)
5074                         goto set_ch_out;
5075
5076                 ch = channel->hw_value;
5077                 ch_info = il_get_channel_info(il, channel->band, ch);
5078                 if (!il_is_channel_valid(ch_info)) {
5079                         D_MAC80211("leave - invalid channel\n");
5080                         ret = -EINVAL;
5081                         goto set_ch_out;
5082                 }
5083
5084                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5085                     !il_is_channel_ibss(ch_info)) {
5086                         D_MAC80211("leave - not IBSS channel\n");
5087                         ret = -EINVAL;
5088                         goto set_ch_out;
5089                 }
5090
5091                 spin_lock_irqsave(&il->lock, flags);
5092
5093                 /* Configure HT40 channels */
5094                 if (il->ht.enabled != conf_is_ht(conf)) {
5095                         il->ht.enabled = conf_is_ht(conf);
5096                         ht_changed = true;
5097                 }
5098                 if (il->ht.enabled) {
5099                         if (conf_is_ht40_minus(conf)) {
5100                                 il->ht.extension_chan_offset =
5101                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5102                                 il->ht.is_40mhz = true;
5103                         } else if (conf_is_ht40_plus(conf)) {
5104                                 il->ht.extension_chan_offset =
5105                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5106                                 il->ht.is_40mhz = true;
5107                         } else {
5108                                 il->ht.extension_chan_offset =
5109                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5110                                 il->ht.is_40mhz = false;
5111                         }
5112                 } else
5113                         il->ht.is_40mhz = false;
5114
5115                 /*
5116                  * Default to no protection. Protection mode will
5117                  * later be set from BSS config in il_ht_conf
5118                  */
5119                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5120
5121                 /* if we are switching from ht to 2.4 clear flags
5122                  * from any ht related info since 2.4 does not
5123                  * support ht */
5124                 if ((le16_to_cpu(il->staging.channel) != ch))
5125                         il->staging.flags = 0;
5126
5127                 il_set_rxon_channel(il, channel);
5128                 il_set_rxon_ht(il, ht_conf);
5129
5130                 il_set_flags_for_band(il, channel->band, il->vif);
5131
5132                 spin_unlock_irqrestore(&il->lock, flags);
5133
5134                 if (il->ops->update_bcast_stations)
5135                         ret = il->ops->update_bcast_stations(il);
5136
5137 set_ch_out:
5138                 /* The list of supported rates and rate mask can be different
5139                  * for each band; since the band may have changed, reset
5140                  * the rate mask to what mac80211 lists */
5141                 il_set_rate(il);
5142         }
5143
5144         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5145                 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5146                 ret = il_power_update_mode(il, false);
5147                 if (ret)
5148                         D_MAC80211("Error setting sleep level\n");
5149         }
5150
5151         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5152                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5153                            conf->power_level);
5154
5155                 il_set_tx_power(il, conf->power_level, false);
5156         }
5157
5158         if (!il_is_ready(il)) {
5159                 D_MAC80211("leave - not ready\n");
5160                 goto out;
5161         }
5162
5163         if (scan_active)
5164                 goto out;
5165
5166         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5167                 il_commit_rxon(il);
5168         else
5169                 D_INFO("Not re-sending same RXON configuration.\n");
5170         if (ht_changed)
5171                 il_update_qos(il);
5172
5173 out:
5174         D_MAC80211("leave ret %d\n", ret);
5175         mutex_unlock(&il->mutex);
5176
5177         return ret;
5178 }
5179 EXPORT_SYMBOL(il_mac_config);
5180
5181 void
5182 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5183 {
5184         struct il_priv *il = hw->priv;
5185         unsigned long flags;
5186
5187         mutex_lock(&il->mutex);
5188         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5189
5190         spin_lock_irqsave(&il->lock, flags);
5191
5192         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5193
5194         /* new association get rid of ibss beacon skb */
5195         if (il->beacon_skb)
5196                 dev_kfree_skb(il->beacon_skb);
5197         il->beacon_skb = NULL;
5198         il->timestamp = 0;
5199
5200         spin_unlock_irqrestore(&il->lock, flags);
5201
5202         il_scan_cancel_timeout(il, 100);
5203         if (!il_is_ready_rf(il)) {
5204                 D_MAC80211("leave - not ready\n");
5205                 mutex_unlock(&il->mutex);
5206                 return;
5207         }
5208
5209         /* we are restarting association process */
5210         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5211         il_commit_rxon(il);
5212
5213         il_set_rate(il);
5214
5215         D_MAC80211("leave\n");
5216         mutex_unlock(&il->mutex);
5217 }
5218 EXPORT_SYMBOL(il_mac_reset_tsf);
5219
5220 static void
5221 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5222 {
5223         struct il_ht_config *ht_conf = &il->current_ht_config;
5224         struct ieee80211_sta *sta;
5225         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5226
5227         D_ASSOC("enter:\n");
5228
5229         if (!il->ht.enabled)
5230                 return;
5231
5232         il->ht.protection =
5233             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5234         il->ht.non_gf_sta_present =
5235             !!(bss_conf->
5236                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5237
5238         ht_conf->single_chain_sufficient = false;
5239
5240         switch (vif->type) {
5241         case NL80211_IFTYPE_STATION:
5242                 rcu_read_lock();
5243                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5244                 if (sta) {
5245                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5246                         int maxstreams;
5247
5248                         maxstreams =
5249                             (ht_cap->mcs.
5250                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5251                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5252                         maxstreams += 1;
5253
5254                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5255                             ht_cap->mcs.rx_mask[2] == 0)
5256                                 ht_conf->single_chain_sufficient = true;
5257                         if (maxstreams <= 1)
5258                                 ht_conf->single_chain_sufficient = true;
5259                 } else {
5260                         /*
5261                          * If at all, this can only happen through a race
5262                          * when the AP disconnects us while we're still
5263                          * setting up the connection, in that case mac80211
5264                          * will soon tell us about that.
5265                          */
5266                         ht_conf->single_chain_sufficient = true;
5267                 }
5268                 rcu_read_unlock();
5269                 break;
5270         case NL80211_IFTYPE_ADHOC:
5271                 ht_conf->single_chain_sufficient = true;
5272                 break;
5273         default:
5274                 break;
5275         }
5276
5277         D_ASSOC("leave\n");
5278 }
5279
5280 static inline void
5281 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5282 {
5283         /*
5284          * inform the ucode that there is no longer an
5285          * association and that no more packets should be
5286          * sent
5287          */
5288         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5289         il->staging.assoc_id = 0;
5290         il_commit_rxon(il);
5291 }
5292
5293 static void
5294 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5295 {
5296         struct il_priv *il = hw->priv;
5297         unsigned long flags;
5298         __le64 timestamp;
5299         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5300
5301         if (!skb)
5302                 return;
5303
5304         D_MAC80211("enter\n");
5305
5306         lockdep_assert_held(&il->mutex);
5307
5308         if (!il->beacon_enabled) {
5309                 IL_ERR("update beacon with no beaconing enabled\n");
5310                 dev_kfree_skb(skb);
5311                 return;
5312         }
5313
5314         spin_lock_irqsave(&il->lock, flags);
5315
5316         if (il->beacon_skb)
5317                 dev_kfree_skb(il->beacon_skb);
5318
5319         il->beacon_skb = skb;
5320
5321         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5322         il->timestamp = le64_to_cpu(timestamp);
5323
5324         D_MAC80211("leave\n");
5325         spin_unlock_irqrestore(&il->lock, flags);
5326
5327         if (!il_is_ready_rf(il)) {
5328                 D_MAC80211("leave - RF not ready\n");
5329                 return;
5330         }
5331
5332         il->ops->post_associate(il);
5333 }
5334
5335 void
5336 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5337                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5338 {
5339         struct il_priv *il = hw->priv;
5340         int ret;
5341
5342         mutex_lock(&il->mutex);
5343         D_MAC80211("enter: changes 0x%x\n", changes);
5344
5345         if (!il_is_alive(il)) {
5346                 D_MAC80211("leave - not alive\n");
5347                 mutex_unlock(&il->mutex);
5348                 return;
5349         }
5350
5351         if (changes & BSS_CHANGED_QOS) {
5352                 unsigned long flags;
5353
5354                 spin_lock_irqsave(&il->lock, flags);
5355                 il->qos_data.qos_active = bss_conf->qos;
5356                 il_update_qos(il);
5357                 spin_unlock_irqrestore(&il->lock, flags);
5358         }
5359
5360         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5361                 /* FIXME: can we remove beacon_enabled ? */
5362                 if (vif->bss_conf.enable_beacon)
5363                         il->beacon_enabled = true;
5364                 else
5365                         il->beacon_enabled = false;
5366         }
5367
5368         if (changes & BSS_CHANGED_BSSID) {
5369                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5370
5371                 /*
5372                  * On passive channel we wait with blocked queues to see if
5373                  * there is traffic on that channel. If no frame will be
5374                  * received (what is very unlikely since scan detects AP on
5375                  * that channel, but theoretically possible), mac80211 associate
5376                  * procedure will time out and mac80211 will call us with NULL
5377                  * bssid. We have to unblock queues on such condition.
5378                  */
5379                 if (is_zero_ether_addr(bss_conf->bssid))
5380                         il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5381
5382                 /*
5383                  * If there is currently a HW scan going on in the background,
5384                  * then we need to cancel it, otherwise sometimes we are not
5385                  * able to authenticate (FIXME: why ?)
5386                  */
5387                 if (il_scan_cancel_timeout(il, 100)) {
5388                         D_MAC80211("leave - scan abort failed\n");
5389                         mutex_unlock(&il->mutex);
5390                         return;
5391                 }
5392
5393                 /* mac80211 only sets assoc when in STATION mode */
5394                 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5395
5396                 /* FIXME: currently needed in a few places */
5397                 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5398         }
5399
5400         /*
5401          * This needs to be after setting the BSSID in case
5402          * mac80211 decides to do both changes at once because
5403          * it will invoke post_associate.
5404          */
5405         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5406                 il_beacon_update(hw, vif);
5407
5408         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5409                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5410                 if (bss_conf->use_short_preamble)
5411                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5412                 else
5413                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5414         }
5415
5416         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5417                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5418                 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5419                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5420                 else
5421                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5422                 if (bss_conf->use_cts_prot)
5423                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5424                 else
5425                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5426         }
5427
5428         if (changes & BSS_CHANGED_BASIC_RATES) {
5429                 /* XXX use this information
5430                  *
5431                  * To do that, remove code from il_set_rate() and put something
5432                  * like this here:
5433                  *
5434                  if (A-band)
5435                  il->staging.ofdm_basic_rates =
5436                  bss_conf->basic_rates;
5437                  else
5438                  il->staging.ofdm_basic_rates =
5439                  bss_conf->basic_rates >> 4;
5440                  il->staging.cck_basic_rates =
5441                  bss_conf->basic_rates & 0xF;
5442                  */
5443         }
5444
5445         if (changes & BSS_CHANGED_HT) {
5446                 il_ht_conf(il, vif);
5447
5448                 if (il->ops->set_rxon_chain)
5449                         il->ops->set_rxon_chain(il);
5450         }
5451
5452         if (changes & BSS_CHANGED_ASSOC) {
5453                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5454                 if (bss_conf->assoc) {
5455                         il->timestamp = bss_conf->sync_tsf;
5456
5457                         if (!il_is_rfkill(il))
5458                                 il->ops->post_associate(il);
5459                 } else
5460                         il_set_no_assoc(il, vif);
5461         }
5462
5463         if (changes && il_is_associated(il) && bss_conf->aid) {
5464                 D_MAC80211("Changes (%#x) while associated\n", changes);
5465                 ret = il_send_rxon_assoc(il);
5466                 if (!ret) {
5467                         /* Sync active_rxon with latest change. */
5468                         memcpy((void *)&il->active, &il->staging,
5469                                sizeof(struct il_rxon_cmd));
5470                 }
5471         }
5472
5473         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5474                 if (vif->bss_conf.enable_beacon) {
5475                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5476                                ETH_ALEN);
5477                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5478                         il->ops->config_ap(il);
5479                 } else
5480                         il_set_no_assoc(il, vif);
5481         }
5482
5483         if (changes & BSS_CHANGED_IBSS) {
5484                 ret = il->ops->manage_ibss_station(il, vif,
5485                                                    bss_conf->ibss_joined);
5486                 if (ret)
5487                         IL_ERR("failed to %s IBSS station %pM\n",
5488                                bss_conf->ibss_joined ? "add" : "remove",
5489                                bss_conf->bssid);
5490         }
5491
5492         D_MAC80211("leave\n");
5493         mutex_unlock(&il->mutex);
5494 }
5495 EXPORT_SYMBOL(il_mac_bss_info_changed);
5496
5497 irqreturn_t
5498 il_isr(int irq, void *data)
5499 {
5500         struct il_priv *il = data;
5501         u32 inta, inta_mask;
5502         u32 inta_fh;
5503         unsigned long flags;
5504         if (!il)
5505                 return IRQ_NONE;
5506
5507         spin_lock_irqsave(&il->lock, flags);
5508
5509         /* Disable (but don't clear!) interrupts here to avoid
5510          *    back-to-back ISRs and sporadic interrupts from our NIC.
5511          * If we have something to service, the tasklet will re-enable ints.
5512          * If we *don't* have something, we'll re-enable before leaving here. */
5513         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5514         _il_wr(il, CSR_INT_MASK, 0x00000000);
5515
5516         /* Discover which interrupts are active/pending */
5517         inta = _il_rd(il, CSR_INT);
5518         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5519
5520         /* Ignore interrupt if there's nothing in NIC to service.
5521          * This may be due to IRQ shared with another device,
5522          * or due to sporadic interrupts thrown from our NIC. */
5523         if (!inta && !inta_fh) {
5524                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5525                 goto none;
5526         }
5527
5528         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5529                 /* Hardware disappeared. It might have already raised
5530                  * an interrupt */
5531                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5532                 goto unplugged;
5533         }
5534
5535         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5536               inta_fh);
5537
5538         inta &= ~CSR_INT_BIT_SCD;
5539
5540         /* il_irq_tasklet() will service interrupts and re-enable them */
5541         if (likely(inta || inta_fh))
5542                 tasklet_schedule(&il->irq_tasklet);
5543
5544 unplugged:
5545         spin_unlock_irqrestore(&il->lock, flags);
5546         return IRQ_HANDLED;
5547
5548 none:
5549         /* re-enable interrupts here since we don't have anything to service. */
5550         /* only Re-enable if disabled by irq */
5551         if (test_bit(S_INT_ENABLED, &il->status))
5552                 il_enable_interrupts(il);
5553         spin_unlock_irqrestore(&il->lock, flags);
5554         return IRQ_NONE;
5555 }
5556 EXPORT_SYMBOL(il_isr);
5557
5558 /*
5559  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5560  *  function.
5561  */
5562 void
5563 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5564                      __le16 fc, __le32 *tx_flags)
5565 {
5566         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5567                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5568                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5569                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5570
5571                 if (!ieee80211_is_mgmt(fc))
5572                         return;
5573
5574                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5575                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5576                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5577                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5578                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5579                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5580                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5581                         break;
5582                 }
5583         } else if (info->control.rates[0].
5584                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5585                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5586                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5587                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5588         }
5589 }
5590 EXPORT_SYMBOL(il_tx_cmd_protection);