drivers/net/wireless/iwlegacy/common.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/types.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/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                 ret = -ENOMEM;
 728                 goto alloc_err;
 729         }
 730         e = (__le16 *) il->eeprom;
 731
 732         il->ops->apm_init(il);
 733
 734         ret = il_eeprom_verify_signature(il);
 735         if (ret < 0) {
 736                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 737                 ret = -ENOENT;
 738                 goto err;
 739         }
 740
 741         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 742         ret = il->ops->eeprom_acquire_semaphore(il);
 743         if (ret < 0) {
 744                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 745                 ret = -ENOENT;
 746                 goto err;
 747         }
 748
 749         /* eeprom is an array of 16bit values */
 750         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 751                 u32 r;
 752
 753                 _il_wr(il, CSR_EEPROM_REG,
 754                        CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 755
 756                 ret =
 757                     _il_poll_bit(il, CSR_EEPROM_REG,
 758                                  CSR_EEPROM_REG_READ_VALID_MSK,
 759                                  CSR_EEPROM_REG_READ_VALID_MSK,
 760                                  IL_EEPROM_ACCESS_TIMEOUT);
 761                 if (ret < 0) {
 762                         IL_ERR("Time out reading EEPROM[%d]\n", addr);
 763                         goto done;
 764                 }
 765                 r = _il_rd(il, CSR_EEPROM_REG);
 766                 e[addr / 2] = cpu_to_le16(r >> 16);
 767         }
 768
 769         D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 770                  il_eeprom_query16(il, EEPROM_VERSION));
 771
 772         ret = 0;
 773 done:
 774         il->ops->eeprom_release_semaphore(il);
 775
 776 err:
 777         if (ret)
 778                 il_eeprom_free(il);
 779         /* Reset chip to save power until we load uCode during "up". */
 780         il_apm_stop(il);
 781 alloc_err:
 782         return ret;
 783 }
 784 EXPORT_SYMBOL(il_eeprom_init);
 785
 786 void
 787 il_eeprom_free(struct il_priv *il)
 788 {
 789         kfree(il->eeprom);
 790         il->eeprom = NULL;
 791 }
 792 EXPORT_SYMBOL(il_eeprom_free);
 793
 794 static void
 795 il_init_band_reference(const struct il_priv *il, int eep_band,
 796                        int *eeprom_ch_count,
 797                        const struct il_eeprom_channel **eeprom_ch_info,
 798                        const u8 **eeprom_ch_idx)
 799 {
 800         u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 801
 802         switch (eep_band) {
 803         case 1:         /* 2.4GHz band */
 804                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 805                 *eeprom_ch_info =
 806                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 807                                                                      offset);
 808                 *eeprom_ch_idx = il_eeprom_band_1;
 809                 break;
 810         case 2:         /* 4.9GHz band */
 811                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 812                 *eeprom_ch_info =
 813                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 814                                                                      offset);
 815                 *eeprom_ch_idx = il_eeprom_band_2;
 816                 break;
 817         case 3:         /* 5.2GHz band */
 818                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 819                 *eeprom_ch_info =
 820                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 821                                                                      offset);
 822                 *eeprom_ch_idx = il_eeprom_band_3;
 823                 break;
 824         case 4:         /* 5.5GHz band */
 825                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 826                 *eeprom_ch_info =
 827                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 828                                                                      offset);
 829                 *eeprom_ch_idx = il_eeprom_band_4;
 830                 break;
 831         case 5:         /* 5.7GHz band */
 832                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 833                 *eeprom_ch_info =
 834                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 835                                                                      offset);
 836                 *eeprom_ch_idx = il_eeprom_band_5;
 837                 break;
 838         case 6:         /* 2.4GHz ht40 channels */
 839                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 840                 *eeprom_ch_info =
 841                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 842                                                                      offset);
 843                 *eeprom_ch_idx = il_eeprom_band_6;
 844                 break;
 845         case 7:         /* 5 GHz ht40 channels */
 846                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 847                 *eeprom_ch_info =
 848                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 849                                                                      offset);
 850                 *eeprom_ch_idx = il_eeprom_band_7;
 851                 break;
 852         default:
 853                 BUG();
 854         }
 855 }
 856
 857 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 858                             ? # x " " : "")
 859 /**
 860  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 861  *
 862  * Does not set up a command, or touch hardware.
 863  */
 864 static int
 865 il_mod_ht40_chan_info(struct il_priv *il, enum ieee80211_band band, u16 channel,
 866                       const struct il_eeprom_channel *eeprom_ch,
 867                       u8 clear_ht40_extension_channel)
 868 {
 869         struct il_channel_info *ch_info;
 870
 871         ch_info =
 872             (struct il_channel_info *)il_get_channel_info(il, band, channel);
 873
 874         if (!il_is_channel_valid(ch_info))
 875                 return -1;
 876
 877         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 878                  " Ad-Hoc %ssupported\n", ch_info->channel,
 879                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 880                  CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 881                  CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 882                  CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 883                  eeprom_ch->max_power_avg,
 884                  ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 885                   !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 886
 887         ch_info->ht40_eeprom = *eeprom_ch;
 888         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 889         ch_info->ht40_flags = eeprom_ch->flags;
 890         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 891                 ch_info->ht40_extension_channel &=
 892                     ~clear_ht40_extension_channel;
 893
 894         return 0;
 895 }
 896
 897 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 898                             ? # x " " : "")
 899
 900 /**
 901  * il_init_channel_map - Set up driver's info for all possible channels
 902  */
 903 int
 904 il_init_channel_map(struct il_priv *il)
 905 {
 906         int eeprom_ch_count = 0;
 907         const u8 *eeprom_ch_idx = NULL;
 908         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 909         int band, ch;
 910         struct il_channel_info *ch_info;
 911
 912         if (il->channel_count) {
 913                 D_EEPROM("Channel map already initialized.\n");
 914                 return 0;
 915         }
 916
 917         D_EEPROM("Initializing regulatory info from EEPROM\n");
 918
 919         il->channel_count =
 920             ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 921             ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 922             ARRAY_SIZE(il_eeprom_band_5);
 923
 924         D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 925
 926         il->channel_info =
 927             kzalloc(sizeof(struct il_channel_info) * il->channel_count,
 928                     GFP_KERNEL);
 929         if (!il->channel_info) {
 930                 IL_ERR("Could not allocate channel_info\n");
 931                 il->channel_count = 0;
 932                 return -ENOMEM;
 933         }
 934
 935         ch_info = il->channel_info;
 936
 937         /* Loop through the 5 EEPROM bands adding them in order to the
 938          * channel map we maintain (that contains additional information than
 939          * what just in the EEPROM) */
 940         for (band = 1; band <= 5; band++) {
 941
 942                 il_init_band_reference(il, band, &eeprom_ch_count,
 943                                        &eeprom_ch_info, &eeprom_ch_idx);
 944
 945                 /* Loop through each band adding each of the channels */
 946                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 947                         ch_info->channel = eeprom_ch_idx[ch];
 948                         ch_info->band =
 949                             (band ==
 950                              1) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 951
 952                         /* permanently store EEPROM's channel regulatory flags
 953                          *   and max power in channel info database. */
 954                         ch_info->eeprom = eeprom_ch_info[ch];
 955
 956                         /* Copy the run-time flags so they are there even on
 957                          * invalid channels */
 958                         ch_info->flags = eeprom_ch_info[ch].flags;
 959                         /* First write that ht40 is not enabled, and then enable
 960                          * one by one */
 961                         ch_info->ht40_extension_channel =
 962                             IEEE80211_CHAN_NO_HT40;
 963
 964                         if (!(il_is_channel_valid(ch_info))) {
 965                                 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 966                                          "No traffic\n", ch_info->channel,
 967                                          ch_info->flags,
 968                                          il_is_channel_a_band(ch_info) ? "5.2" :
 969                                          "2.4");
 970                                 ch_info++;
 971                                 continue;
 972                         }
 973
 974                         /* Initialize regulatory-based run-time data */
 975                         ch_info->max_power_avg = ch_info->curr_txpow =
 976                             eeprom_ch_info[ch].max_power_avg;
 977                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 978                         ch_info->min_power = 0;
 979
 980                         D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 981                                  " Ad-Hoc %ssupported\n", ch_info->channel,
 982                                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 983                                  CHECK_AND_PRINT_I(VALID),
 984                                  CHECK_AND_PRINT_I(IBSS),
 985                                  CHECK_AND_PRINT_I(ACTIVE),
 986                                  CHECK_AND_PRINT_I(RADAR),
 987                                  CHECK_AND_PRINT_I(WIDE),
 988                                  CHECK_AND_PRINT_I(DFS),
 989                                  eeprom_ch_info[ch].flags,
 990                                  eeprom_ch_info[ch].max_power_avg,
 991                                  ((eeprom_ch_info[ch].
 992                                    flags & EEPROM_CHANNEL_IBSS) &&
 993                                   !(eeprom_ch_info[ch].
 994                                     flags & EEPROM_CHANNEL_RADAR)) ? "" :
 995                                  "not ");
 996
 997                         ch_info++;
 998                 }
 999         }
1000
1001         /* Check if we do have HT40 channels */
1002         if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1003             il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1004                 return 0;
1005
1006         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1007         for (band = 6; band <= 7; band++) {
1008                 enum ieee80211_band ieeeband;
1009
1010                 il_init_band_reference(il, band, &eeprom_ch_count,
1011                                        &eeprom_ch_info, &eeprom_ch_idx);
1012
1013                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1014                 ieeeband =
1015                     (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1016
1017                 /* Loop through each band adding each of the channels */
1018                 for (ch = 0; ch < eeprom_ch_count; ch++) {
1019                         /* Set up driver's info for lower half */
1020                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1021                                               &eeprom_ch_info[ch],
1022                                               IEEE80211_CHAN_NO_HT40PLUS);
1023
1024                         /* Set up driver's info for upper half */
1025                         il_mod_ht40_chan_info(il, ieeeband,
1026                                               eeprom_ch_idx[ch] + 4,
1027                                               &eeprom_ch_info[ch],
1028                                               IEEE80211_CHAN_NO_HT40MINUS);
1029                 }
1030         }
1031
1032         return 0;
1033 }
1034 EXPORT_SYMBOL(il_init_channel_map);
1035
1036 /*
1037  * il_free_channel_map - undo allocations in il_init_channel_map
1038  */
1039 void
1040 il_free_channel_map(struct il_priv *il)
1041 {
1042         kfree(il->channel_info);
1043         il->channel_count = 0;
1044 }
1045 EXPORT_SYMBOL(il_free_channel_map);
1046
1047 /**
1048  * il_get_channel_info - Find driver's ilate channel info
1049  *
1050  * Based on band and channel number.
1051  */
1052 const struct il_channel_info *
1053 il_get_channel_info(const struct il_priv *il, enum ieee80211_band band,
1054                     u16 channel)
1055 {
1056         int i;
1057
1058         switch (band) {
1059         case IEEE80211_BAND_5GHZ:
1060                 for (i = 14; i < il->channel_count; i++) {
1061                         if (il->channel_info[i].channel == channel)
1062                                 return &il->channel_info[i];
1063                 }
1064                 break;
1065         case IEEE80211_BAND_2GHZ:
1066                 if (channel >= 1 && channel <= 14)
1067                         return &il->channel_info[channel - 1];
1068                 break;
1069         default:
1070                 BUG();
1071         }
1072
1073         return NULL;
1074 }
1075 EXPORT_SYMBOL(il_get_channel_info);
1076
1077 /*
1078  * Setting power level allows the card to go to sleep when not busy.
1079  *
1080  * We calculate a sleep command based on the required latency, which
1081  * we get from mac80211.
1082  */
1083
1084 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1085                 cpu_to_le32(X0), \
1086                 cpu_to_le32(X1), \
1087                 cpu_to_le32(X2), \
1088                 cpu_to_le32(X3), \
1089                 cpu_to_le32(X4)  \
1090 }
1091
1092 static void
1093 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1094 {
1095         const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1096                 SLP_VEC(2, 2, 4, 6, 0xFF),
1097                 SLP_VEC(2, 4, 7, 10, 10),
1098                 SLP_VEC(4, 7, 10, 10, 0xFF)
1099         };
1100         int i, dtim_period, no_dtim;
1101         u32 max_sleep;
1102         bool skip;
1103
1104         memset(cmd, 0, sizeof(*cmd));
1105
1106         if (il->power_data.pci_pm)
1107                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1108
1109         /* if no Power Save, we are done */
1110         if (il->power_data.ps_disabled)
1111                 return;
1112
1113         cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1114         cmd->keep_alive_seconds = 0;
1115         cmd->debug_flags = 0;
1116         cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1117         cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1118         cmd->keep_alive_beacons = 0;
1119
1120         dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1121
1122         if (dtim_period <= 2) {
1123                 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1124                 no_dtim = 2;
1125         } else if (dtim_period <= 10) {
1126                 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1127                 no_dtim = 2;
1128         } else {
1129                 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1130                 no_dtim = 0;
1131         }
1132
1133         if (dtim_period == 0) {
1134                 dtim_period = 1;
1135                 skip = false;
1136         } else {
1137                 skip = !!no_dtim;
1138         }
1139
1140         if (skip) {
1141                 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1142
1143                 max_sleep = le32_to_cpu(tmp);
1144                 if (max_sleep == 0xFF)
1145                         max_sleep = dtim_period * (skip + 1);
1146                 else if (max_sleep >  dtim_period)
1147                         max_sleep = (max_sleep / dtim_period) * dtim_period;
1148                 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1149         } else {
1150                 max_sleep = dtim_period;
1151                 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1152         }
1153
1154         for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1155                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1156                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1157 }
1158
1159 static int
1160 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1161 {
1162         D_POWER("Sending power/sleep command\n");
1163         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1164         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1165         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1166         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1167                 le32_to_cpu(cmd->sleep_interval[0]),
1168                 le32_to_cpu(cmd->sleep_interval[1]),
1169                 le32_to_cpu(cmd->sleep_interval[2]),
1170                 le32_to_cpu(cmd->sleep_interval[3]),
1171                 le32_to_cpu(cmd->sleep_interval[4]));
1172
1173         return il_send_cmd_pdu(il, C_POWER_TBL,
1174                                sizeof(struct il_powertable_cmd), cmd);
1175 }
1176
1177 static int
1178 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1179 {
1180         int ret;
1181         bool update_chains;
1182
1183         lockdep_assert_held(&il->mutex);
1184
1185         /* Don't update the RX chain when chain noise calibration is running */
1186         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1187             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1188
1189         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1190                 return 0;
1191
1192         if (!il_is_ready_rf(il))
1193                 return -EIO;
1194
1195         /* scan complete use sleep_power_next, need to be updated */
1196         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1197         if (test_bit(S_SCANNING, &il->status) && !force) {
1198                 D_INFO("Defer power set mode while scanning\n");
1199                 return 0;
1200         }
1201
1202         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1203                 set_bit(S_POWER_PMI, &il->status);
1204
1205         ret = il_set_power(il, cmd);
1206         if (!ret) {
1207                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1208                         clear_bit(S_POWER_PMI, &il->status);
1209
1210                 if (il->ops->update_chain_flags && update_chains)
1211                         il->ops->update_chain_flags(il);
1212                 else if (il->ops->update_chain_flags)
1213                         D_POWER("Cannot update the power, chain noise "
1214                                 "calibration running: %d\n",
1215                                 il->chain_noise_data.state);
1216
1217                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1218         } else
1219                 IL_ERR("set power fail, ret = %d", ret);
1220
1221         return ret;
1222 }
1223
1224 int
1225 il_power_update_mode(struct il_priv *il, bool force)
1226 {
1227         struct il_powertable_cmd cmd;
1228
1229         il_build_powertable_cmd(il, &cmd);
1230
1231         return il_power_set_mode(il, &cmd, force);
1232 }
1233 EXPORT_SYMBOL(il_power_update_mode);
1234
1235 /* initialize to default */
1236 void
1237 il_power_initialize(struct il_priv *il)
1238 {
1239         u16 lctl;
1240
1241         pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1242         il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1243
1244         il->power_data.debug_sleep_level_override = -1;
1245
1246         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1247 }
1248 EXPORT_SYMBOL(il_power_initialize);
1249
1250 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1251  * sending probe req.  This should be set long enough to hear probe responses
1252  * from more than one AP.  */
1253 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1254 #define IL_ACTIVE_DWELL_TIME_52    (20)
1255
1256 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1257 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1258
1259 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1260  * Must be set longer than active dwell time.
1261  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1262 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1263 #define IL_PASSIVE_DWELL_TIME_52   (10)
1264 #define IL_PASSIVE_DWELL_BASE      (100)
1265 #define IL_CHANNEL_TUNE_TIME       5
1266
1267 static int
1268 il_send_scan_abort(struct il_priv *il)
1269 {
1270         int ret;
1271         struct il_rx_pkt *pkt;
1272         struct il_host_cmd cmd = {
1273                 .id = C_SCAN_ABORT,
1274                 .flags = CMD_WANT_SKB,
1275         };
1276
1277         /* Exit instantly with error when device is not ready
1278          * to receive scan abort command or it does not perform
1279          * hardware scan currently */
1280         if (!test_bit(S_READY, &il->status) ||
1281             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1282             !test_bit(S_SCAN_HW, &il->status) ||
1283             test_bit(S_FW_ERROR, &il->status) ||
1284             test_bit(S_EXIT_PENDING, &il->status))
1285                 return -EIO;
1286
1287         ret = il_send_cmd_sync(il, &cmd);
1288         if (ret)
1289                 return ret;
1290
1291         pkt = (struct il_rx_pkt *)cmd.reply_page;
1292         if (pkt->u.status != CAN_ABORT_STATUS) {
1293                 /* The scan abort will return 1 for success or
1294                  * 2 for "failure".  A failure condition can be
1295                  * due to simply not being in an active scan which
1296                  * can occur if we send the scan abort before we
1297                  * the microcode has notified us that a scan is
1298                  * completed. */
1299                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1300                 ret = -EIO;
1301         }
1302
1303         il_free_pages(il, cmd.reply_page);
1304         return ret;
1305 }
1306
1307 static void
1308 il_complete_scan(struct il_priv *il, bool aborted)
1309 {
1310         /* check if scan was requested from mac80211 */
1311         if (il->scan_request) {
1312                 D_SCAN("Complete scan in mac80211\n");
1313                 ieee80211_scan_completed(il->hw, aborted);
1314         }
1315
1316         il->scan_vif = NULL;
1317         il->scan_request = NULL;
1318 }
1319
1320 void
1321 il_force_scan_end(struct il_priv *il)
1322 {
1323         lockdep_assert_held(&il->mutex);
1324
1325         if (!test_bit(S_SCANNING, &il->status)) {
1326                 D_SCAN("Forcing scan end while not scanning\n");
1327                 return;
1328         }
1329
1330         D_SCAN("Forcing scan end\n");
1331         clear_bit(S_SCANNING, &il->status);
1332         clear_bit(S_SCAN_HW, &il->status);
1333         clear_bit(S_SCAN_ABORTING, &il->status);
1334         il_complete_scan(il, true);
1335 }
1336
1337 static void
1338 il_do_scan_abort(struct il_priv *il)
1339 {
1340         int ret;
1341
1342         lockdep_assert_held(&il->mutex);
1343
1344         if (!test_bit(S_SCANNING, &il->status)) {
1345                 D_SCAN("Not performing scan to abort\n");
1346                 return;
1347         }
1348
1349         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1350                 D_SCAN("Scan abort in progress\n");
1351                 return;
1352         }
1353
1354         ret = il_send_scan_abort(il);
1355         if (ret) {
1356                 D_SCAN("Send scan abort failed %d\n", ret);
1357                 il_force_scan_end(il);
1358         } else
1359                 D_SCAN("Successfully send scan abort\n");
1360 }
1361
1362 /**
1363  * il_scan_cancel - Cancel any currently executing HW scan
1364  */
1365 int
1366 il_scan_cancel(struct il_priv *il)
1367 {
1368         D_SCAN("Queuing abort scan\n");
1369         queue_work(il->workqueue, &il->abort_scan);
1370         return 0;
1371 }
1372 EXPORT_SYMBOL(il_scan_cancel);
1373
1374 /**
1375  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1376  * @ms: amount of time to wait (in milliseconds) for scan to abort
1377  *
1378  */
1379 int
1380 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1381 {
1382         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1383
1384         lockdep_assert_held(&il->mutex);
1385
1386         D_SCAN("Scan cancel timeout\n");
1387
1388         il_do_scan_abort(il);
1389
1390         while (time_before_eq(jiffies, timeout)) {
1391                 if (!test_bit(S_SCAN_HW, &il->status))
1392                         break;
1393                 msleep(20);
1394         }
1395
1396         return test_bit(S_SCAN_HW, &il->status);
1397 }
1398 EXPORT_SYMBOL(il_scan_cancel_timeout);
1399
1400 /* Service response to C_SCAN (0x80) */
1401 static void
1402 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1403 {
1404 #ifdef CONFIG_IWLEGACY_DEBUG
1405         struct il_rx_pkt *pkt = rxb_addr(rxb);
1406         struct il_scanreq_notification *notif =
1407             (struct il_scanreq_notification *)pkt->u.raw;
1408
1409         D_SCAN("Scan request status = 0x%x\n", notif->status);
1410 #endif
1411 }
1412
1413 /* Service N_SCAN_START (0x82) */
1414 static void
1415 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1416 {
1417         struct il_rx_pkt *pkt = rxb_addr(rxb);
1418         struct il_scanstart_notification *notif =
1419             (struct il_scanstart_notification *)pkt->u.raw;
1420         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1421         D_SCAN("Scan start: " "%d [802.11%s] "
1422                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1423                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1424                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1425 }
1426
1427 /* Service N_SCAN_RESULTS (0x83) */
1428 static void
1429 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1430 {
1431 #ifdef CONFIG_IWLEGACY_DEBUG
1432         struct il_rx_pkt *pkt = rxb_addr(rxb);
1433         struct il_scanresults_notification *notif =
1434             (struct il_scanresults_notification *)pkt->u.raw;
1435
1436         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1437                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1438                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1439                le32_to_cpu(notif->stats[0]),
1440                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1441 #endif
1442 }
1443
1444 /* Service N_SCAN_COMPLETE (0x84) */
1445 static void
1446 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1447 {
1448
1449 #ifdef CONFIG_IWLEGACY_DEBUG
1450         struct il_rx_pkt *pkt = rxb_addr(rxb);
1451         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1452 #endif
1453
1454         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1455                scan_notif->scanned_channels, scan_notif->tsf_low,
1456                scan_notif->tsf_high, scan_notif->status);
1457
1458         /* The HW is no longer scanning */
1459         clear_bit(S_SCAN_HW, &il->status);
1460
1461         D_SCAN("Scan on %sGHz took %dms\n",
1462                (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1463                jiffies_to_msecs(jiffies - il->scan_start));
1464
1465         queue_work(il->workqueue, &il->scan_completed);
1466 }
1467
1468 void
1469 il_setup_rx_scan_handlers(struct il_priv *il)
1470 {
1471         /* scan handlers */
1472         il->handlers[C_SCAN] = il_hdl_scan;
1473         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1474         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1475         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1476 }
1477 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1478
1479 u16
1480 il_get_active_dwell_time(struct il_priv *il, enum ieee80211_band band,
1481                          u8 n_probes)
1482 {
1483         if (band == IEEE80211_BAND_5GHZ)
1484                 return IL_ACTIVE_DWELL_TIME_52 +
1485                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1486         else
1487                 return IL_ACTIVE_DWELL_TIME_24 +
1488                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1489 }
1490 EXPORT_SYMBOL(il_get_active_dwell_time);
1491
1492 u16
1493 il_get_passive_dwell_time(struct il_priv *il, enum ieee80211_band band,
1494                           struct ieee80211_vif *vif)
1495 {
1496         u16 value;
1497
1498         u16 passive =
1499             (band ==
1500              IEEE80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1501             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1502             IL_PASSIVE_DWELL_TIME_52;
1503
1504         if (il_is_any_associated(il)) {
1505                 /*
1506                  * If we're associated, we clamp the maximum passive
1507                  * dwell time to be 98% of the smallest beacon interval
1508                  * (minus 2 * channel tune time)
1509                  */
1510                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1511                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1512                         value = IL_PASSIVE_DWELL_BASE;
1513                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1514                 passive = min(value, passive);
1515         }
1516
1517         return passive;
1518 }
1519 EXPORT_SYMBOL(il_get_passive_dwell_time);
1520
1521 void
1522 il_init_scan_params(struct il_priv *il)
1523 {
1524         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1525         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1526                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1527         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1528                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1529 }
1530 EXPORT_SYMBOL(il_init_scan_params);
1531
1532 static int
1533 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1534 {
1535         int ret;
1536
1537         lockdep_assert_held(&il->mutex);
1538
1539         cancel_delayed_work(&il->scan_check);
1540
1541         if (!il_is_ready_rf(il)) {
1542                 IL_WARN("Request scan called when driver not ready.\n");
1543                 return -EIO;
1544         }
1545
1546         if (test_bit(S_SCAN_HW, &il->status)) {
1547                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1548                 return -EBUSY;
1549         }
1550
1551         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1552                 D_SCAN("Scan request while abort pending.\n");
1553                 return -EBUSY;
1554         }
1555
1556         D_SCAN("Starting scan...\n");
1557
1558         set_bit(S_SCANNING, &il->status);
1559         il->scan_start = jiffies;
1560
1561         ret = il->ops->request_scan(il, vif);
1562         if (ret) {
1563                 clear_bit(S_SCANNING, &il->status);
1564                 return ret;
1565         }
1566
1567         queue_delayed_work(il->workqueue, &il->scan_check,
1568                            IL_SCAN_CHECK_WATCHDOG);
1569
1570         return 0;
1571 }
1572
1573 int
1574 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1575                struct ieee80211_scan_request *hw_req)
1576 {
1577         struct cfg80211_scan_request *req = &hw_req->req;
1578         struct il_priv *il = hw->priv;
1579         int ret;
1580
1581         if (req->n_channels == 0) {
1582                 IL_ERR("Can not scan on no channels.\n");
1583                 return -EINVAL;
1584         }
1585
1586         mutex_lock(&il->mutex);
1587         D_MAC80211("enter\n");
1588
1589         if (test_bit(S_SCANNING, &il->status)) {
1590                 D_SCAN("Scan already in progress.\n");
1591                 ret = -EAGAIN;
1592                 goto out_unlock;
1593         }
1594
1595         /* mac80211 will only ask for one band at a time */
1596         il->scan_request = req;
1597         il->scan_vif = vif;
1598         il->scan_band = req->channels[0]->band;
1599
1600         ret = il_scan_initiate(il, vif);
1601
1602 out_unlock:
1603         D_MAC80211("leave ret %d\n", ret);
1604         mutex_unlock(&il->mutex);
1605
1606         return ret;
1607 }
1608 EXPORT_SYMBOL(il_mac_hw_scan);
1609
1610 static void
1611 il_bg_scan_check(struct work_struct *data)
1612 {
1613         struct il_priv *il =
1614             container_of(data, struct il_priv, scan_check.work);
1615
1616         D_SCAN("Scan check work\n");
1617
1618         /* Since we are here firmware does not finish scan and
1619          * most likely is in bad shape, so we don't bother to
1620          * send abort command, just force scan complete to mac80211 */
1621         mutex_lock(&il->mutex);
1622         il_force_scan_end(il);
1623         mutex_unlock(&il->mutex);
1624 }
1625
1626 /**
1627  * il_fill_probe_req - fill in all required fields and IE for probe request
1628  */
1629
1630 u16
1631 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1632                   const u8 *ta, const u8 *ies, int ie_len, int left)
1633 {
1634         int len = 0;
1635         u8 *pos = NULL;
1636
1637         /* Make sure there is enough space for the probe request,
1638          * two mandatory IEs and the data */
1639         left -= 24;
1640         if (left < 0)
1641                 return 0;
1642
1643         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1644         eth_broadcast_addr(frame->da);
1645         memcpy(frame->sa, ta, ETH_ALEN);
1646         eth_broadcast_addr(frame->bssid);
1647         frame->seq_ctrl = 0;
1648
1649         len += 24;
1650
1651         /* ...next IE... */
1652         pos = &frame->u.probe_req.variable[0];
1653
1654         /* fill in our indirect SSID IE */
1655         left -= 2;
1656         if (left < 0)
1657                 return 0;
1658         *pos++ = WLAN_EID_SSID;
1659         *pos++ = 0;
1660
1661         len += 2;
1662
1663         if (WARN_ON(left < ie_len))
1664                 return len;
1665
1666         if (ies && ie_len) {
1667                 memcpy(pos, ies, ie_len);
1668                 len += ie_len;
1669         }
1670
1671         return (u16) len;
1672 }
1673 EXPORT_SYMBOL(il_fill_probe_req);
1674
1675 static void
1676 il_bg_abort_scan(struct work_struct *work)
1677 {
1678         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1679
1680         D_SCAN("Abort scan work\n");
1681
1682         /* We keep scan_check work queued in case when firmware will not
1683          * report back scan completed notification */
1684         mutex_lock(&il->mutex);
1685         il_scan_cancel_timeout(il, 200);
1686         mutex_unlock(&il->mutex);
1687 }
1688
1689 static void
1690 il_bg_scan_completed(struct work_struct *work)
1691 {
1692         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1693         bool aborted;
1694
1695         D_SCAN("Completed scan.\n");
1696
1697         cancel_delayed_work(&il->scan_check);
1698
1699         mutex_lock(&il->mutex);
1700
1701         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1702         if (aborted)
1703                 D_SCAN("Aborted scan completed.\n");
1704
1705         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1706                 D_SCAN("Scan already completed.\n");
1707                 goto out_settings;
1708         }
1709
1710         il_complete_scan(il, aborted);
1711
1712 out_settings:
1713         /* Can we still talk to firmware ? */
1714         if (!il_is_ready_rf(il))
1715                 goto out;
1716
1717         /*
1718          * We do not commit power settings while scan is pending,
1719          * do it now if the settings changed.
1720          */
1721         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1722         il_set_tx_power(il, il->tx_power_next, false);
1723
1724         il->ops->post_scan(il);
1725
1726 out:
1727         mutex_unlock(&il->mutex);
1728 }
1729
1730 void
1731 il_setup_scan_deferred_work(struct il_priv *il)
1732 {
1733         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1734         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1735         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1736 }
1737 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1738
1739 void
1740 il_cancel_scan_deferred_work(struct il_priv *il)
1741 {
1742         cancel_work_sync(&il->abort_scan);
1743         cancel_work_sync(&il->scan_completed);
1744
1745         if (cancel_delayed_work_sync(&il->scan_check)) {
1746                 mutex_lock(&il->mutex);
1747                 il_force_scan_end(il);
1748                 mutex_unlock(&il->mutex);
1749         }
1750 }
1751 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1752
1753 /* il->sta_lock must be held */
1754 static void
1755 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1756 {
1757
1758         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1759                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1760                        sta_id, il->stations[sta_id].sta.sta.addr);
1761
1762         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1763                 D_ASSOC("STA id %u addr %pM already present"
1764                         " in uCode (according to driver)\n", sta_id,
1765                         il->stations[sta_id].sta.sta.addr);
1766         } else {
1767                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1768                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1769                         il->stations[sta_id].sta.sta.addr);
1770         }
1771 }
1772
1773 static int
1774 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1775                         struct il_rx_pkt *pkt, bool sync)
1776 {
1777         u8 sta_id = addsta->sta.sta_id;
1778         unsigned long flags;
1779         int ret = -EIO;
1780
1781         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1782                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1783                 return ret;
1784         }
1785
1786         D_INFO("Processing response for adding station %u\n", sta_id);
1787
1788         spin_lock_irqsave(&il->sta_lock, flags);
1789
1790         switch (pkt->u.add_sta.status) {
1791         case ADD_STA_SUCCESS_MSK:
1792                 D_INFO("C_ADD_STA PASSED\n");
1793                 il_sta_ucode_activate(il, sta_id);
1794                 ret = 0;
1795                 break;
1796         case ADD_STA_NO_ROOM_IN_TBL:
1797                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1798                 break;
1799         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1800                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1801                        sta_id);
1802                 break;
1803         case ADD_STA_MODIFY_NON_EXIST_STA:
1804                 IL_ERR("Attempting to modify non-existing station %d\n",
1805                        sta_id);
1806                 break;
1807         default:
1808                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1809                 break;
1810         }
1811
1812         D_INFO("%s station id %u addr %pM\n",
1813                il->stations[sta_id].sta.mode ==
1814                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1815                il->stations[sta_id].sta.sta.addr);
1816
1817         /*
1818          * XXX: The MAC address in the command buffer is often changed from
1819          * the original sent to the device. That is, the MAC address
1820          * written to the command buffer often is not the same MAC address
1821          * read from the command buffer when the command returns. This
1822          * issue has not yet been resolved and this debugging is left to
1823          * observe the problem.
1824          */
1825         D_INFO("%s station according to cmd buffer %pM\n",
1826                il->stations[sta_id].sta.mode ==
1827                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1828         spin_unlock_irqrestore(&il->sta_lock, flags);
1829
1830         return ret;
1831 }
1832
1833 static void
1834 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1835                     struct il_rx_pkt *pkt)
1836 {
1837         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1838
1839         il_process_add_sta_resp(il, addsta, pkt, false);
1840
1841 }
1842
1843 int
1844 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1845 {
1846         struct il_rx_pkt *pkt = NULL;
1847         int ret = 0;
1848         u8 data[sizeof(*sta)];
1849         struct il_host_cmd cmd = {
1850                 .id = C_ADD_STA,
1851                 .flags = flags,
1852                 .data = data,
1853         };
1854         u8 sta_id __maybe_unused = sta->sta.sta_id;
1855
1856         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1857                flags & CMD_ASYNC ? "a" : "");
1858
1859         if (flags & CMD_ASYNC)
1860                 cmd.callback = il_add_sta_callback;
1861         else {
1862                 cmd.flags |= CMD_WANT_SKB;
1863                 might_sleep();
1864         }
1865
1866         cmd.len = il->ops->build_addsta_hcmd(sta, data);
1867         ret = il_send_cmd(il, &cmd);
1868
1869         if (ret || (flags & CMD_ASYNC))
1870                 return ret;
1871
1872         if (ret == 0) {
1873                 pkt = (struct il_rx_pkt *)cmd.reply_page;
1874                 ret = il_process_add_sta_resp(il, sta, pkt, true);
1875         }
1876         il_free_pages(il, cmd.reply_page);
1877
1878         return ret;
1879 }
1880 EXPORT_SYMBOL(il_send_add_sta);
1881
1882 static void
1883 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1884 {
1885         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1886         __le32 sta_flags;
1887
1888         if (!sta || !sta_ht_inf->ht_supported)
1889                 goto done;
1890
1891         D_ASSOC("spatial multiplexing power save mode: %s\n",
1892                 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1893                 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1894                 "disabled");
1895
1896         sta_flags = il->stations[idx].sta.station_flags;
1897
1898         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1899
1900         switch (sta->smps_mode) {
1901         case IEEE80211_SMPS_STATIC:
1902                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1903                 break;
1904         case IEEE80211_SMPS_DYNAMIC:
1905                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1906                 break;
1907         case IEEE80211_SMPS_OFF:
1908                 break;
1909         default:
1910                 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1911                 break;
1912         }
1913
1914         sta_flags |=
1915             cpu_to_le32((u32) sta_ht_inf->
1916                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1917
1918         sta_flags |=
1919             cpu_to_le32((u32) sta_ht_inf->
1920                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1921
1922         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1923                 sta_flags |= STA_FLG_HT40_EN_MSK;
1924         else
1925                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1926
1927         il->stations[idx].sta.station_flags = sta_flags;
1928 done:
1929         return;
1930 }
1931
1932 /**
1933  * il_prep_station - Prepare station information for addition
1934  *
1935  * should be called with sta_lock held
1936  */
1937 u8
1938 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1939                 struct ieee80211_sta *sta)
1940 {
1941         struct il_station_entry *station;
1942         int i;
1943         u8 sta_id = IL_INVALID_STATION;
1944         u16 rate;
1945
1946         if (is_ap)
1947                 sta_id = IL_AP_ID;
1948         else if (is_broadcast_ether_addr(addr))
1949                 sta_id = il->hw_params.bcast_id;
1950         else
1951                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1952                         if (ether_addr_equal(il->stations[i].sta.sta.addr,
1953                                              addr)) {
1954                                 sta_id = i;
1955                                 break;
1956                         }
1957
1958                         if (!il->stations[i].used &&
1959                             sta_id == IL_INVALID_STATION)
1960                                 sta_id = i;
1961                 }
1962
1963         /*
1964          * These two conditions have the same outcome, but keep them
1965          * separate
1966          */
1967         if (unlikely(sta_id == IL_INVALID_STATION))
1968                 return sta_id;
1969
1970         /*
1971          * uCode is not able to deal with multiple requests to add a
1972          * station. Keep track if one is in progress so that we do not send
1973          * another.
1974          */
1975         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1976                 D_INFO("STA %d already in process of being added.\n", sta_id);
1977                 return sta_id;
1978         }
1979
1980         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1981             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1982             ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1983                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1984                         sta_id, addr);
1985                 return sta_id;
1986         }
1987
1988         station = &il->stations[sta_id];
1989         station->used = IL_STA_DRIVER_ACTIVE;
1990         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1991         il->num_stations++;
1992
1993         /* Set up the C_ADD_STA command to send to device */
1994         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1995         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1996         station->sta.mode = 0;
1997         station->sta.sta.sta_id = sta_id;
1998         station->sta.station_flags = 0;
1999
2000         /*
2001          * OK to call unconditionally, since local stations (IBSS BSSID
2002          * STA and broadcast STA) pass in a NULL sta, and mac80211
2003          * doesn't allow HT IBSS.
2004          */
2005         il_set_ht_add_station(il, sta_id, sta);
2006
2007         /* 3945 only */
2008         rate = (il->band == IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
2009         /* Turn on both antennas for the station... */
2010         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
2011
2012         return sta_id;
2013
2014 }
2015 EXPORT_SYMBOL_GPL(il_prep_station);
2016
2017 #define STA_WAIT_TIMEOUT (HZ/2)
2018
2019 /**
2020  * il_add_station_common -
2021  */
2022 int
2023 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2024                       struct ieee80211_sta *sta, u8 *sta_id_r)
2025 {
2026         unsigned long flags_spin;
2027         int ret = 0;
2028         u8 sta_id;
2029         struct il_addsta_cmd sta_cmd;
2030
2031         *sta_id_r = 0;
2032         spin_lock_irqsave(&il->sta_lock, flags_spin);
2033         sta_id = il_prep_station(il, addr, is_ap, sta);
2034         if (sta_id == IL_INVALID_STATION) {
2035                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2036                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2037                 return -EINVAL;
2038         }
2039
2040         /*
2041          * uCode is not able to deal with multiple requests to add a
2042          * station. Keep track if one is in progress so that we do not send
2043          * another.
2044          */
2045         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2046                 D_INFO("STA %d already in process of being added.\n", sta_id);
2047                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2048                 return -EEXIST;
2049         }
2050
2051         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2052             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2053                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2054                         sta_id, addr);
2055                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2056                 return -EEXIST;
2057         }
2058
2059         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2060         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2061                sizeof(struct il_addsta_cmd));
2062         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2063
2064         /* Add station to device's station table */
2065         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2066         if (ret) {
2067                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2068                 IL_ERR("Adding station %pM failed.\n",
2069                        il->stations[sta_id].sta.sta.addr);
2070                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2071                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2072                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2073         }
2074         *sta_id_r = sta_id;
2075         return ret;
2076 }
2077 EXPORT_SYMBOL(il_add_station_common);
2078
2079 /**
2080  * il_sta_ucode_deactivate - deactivate ucode status for a station
2081  *
2082  * il->sta_lock must be held
2083  */
2084 static void
2085 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2086 {
2087         /* Ucode must be active and driver must be non active */
2088         if ((il->stations[sta_id].
2089              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2090             IL_STA_UCODE_ACTIVE)
2091                 IL_ERR("removed non active STA %u\n", sta_id);
2092
2093         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2094
2095         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2096         D_ASSOC("Removed STA %u\n", sta_id);
2097 }
2098
2099 static int
2100 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2101                        bool temporary)
2102 {
2103         struct il_rx_pkt *pkt;
2104         int ret;
2105
2106         unsigned long flags_spin;
2107         struct il_rem_sta_cmd rm_sta_cmd;
2108
2109         struct il_host_cmd cmd = {
2110                 .id = C_REM_STA,
2111                 .len = sizeof(struct il_rem_sta_cmd),
2112                 .flags = CMD_SYNC,
2113                 .data = &rm_sta_cmd,
2114         };
2115
2116         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2117         rm_sta_cmd.num_sta = 1;
2118         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2119
2120         cmd.flags |= CMD_WANT_SKB;
2121
2122         ret = il_send_cmd(il, &cmd);
2123
2124         if (ret)
2125                 return ret;
2126
2127         pkt = (struct il_rx_pkt *)cmd.reply_page;
2128         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2129                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2130                 ret = -EIO;
2131         }
2132
2133         if (!ret) {
2134                 switch (pkt->u.rem_sta.status) {
2135                 case REM_STA_SUCCESS_MSK:
2136                         if (!temporary) {
2137                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2138                                 il_sta_ucode_deactivate(il, sta_id);
2139                                 spin_unlock_irqrestore(&il->sta_lock,
2140                                                        flags_spin);
2141                         }
2142                         D_ASSOC("C_REM_STA PASSED\n");
2143                         break;
2144                 default:
2145                         ret = -EIO;
2146                         IL_ERR("C_REM_STA failed\n");
2147                         break;
2148                 }
2149         }
2150         il_free_pages(il, cmd.reply_page);
2151
2152         return ret;
2153 }
2154
2155 /**
2156  * il_remove_station - Remove driver's knowledge of station.
2157  */
2158 int
2159 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2160 {
2161         unsigned long flags;
2162
2163         if (!il_is_ready(il)) {
2164                 D_INFO("Unable to remove station %pM, device not ready.\n",
2165                        addr);
2166                 /*
2167                  * It is typical for stations to be removed when we are
2168                  * going down. Return success since device will be down
2169                  * soon anyway
2170                  */
2171                 return 0;
2172         }
2173
2174         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2175
2176         if (WARN_ON(sta_id == IL_INVALID_STATION))
2177                 return -EINVAL;
2178
2179         spin_lock_irqsave(&il->sta_lock, flags);
2180
2181         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2182                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2183                 goto out_err;
2184         }
2185
2186         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2187                 D_INFO("Removing %pM but non UCODE active\n", addr);
2188                 goto out_err;
2189         }
2190
2191         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2192                 kfree(il->stations[sta_id].lq);
2193                 il->stations[sta_id].lq = NULL;
2194         }
2195
2196         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2197
2198         il->num_stations--;
2199
2200         BUG_ON(il->num_stations < 0);
2201
2202         spin_unlock_irqrestore(&il->sta_lock, flags);
2203
2204         return il_send_remove_station(il, addr, sta_id, false);
2205 out_err:
2206         spin_unlock_irqrestore(&il->sta_lock, flags);
2207         return -EINVAL;
2208 }
2209 EXPORT_SYMBOL_GPL(il_remove_station);
2210
2211 /**
2212  * il_clear_ucode_stations - clear ucode station table bits
2213  *
2214  * This function clears all the bits in the driver indicating
2215  * which stations are active in the ucode. Call when something
2216  * other than explicit station management would cause this in
2217  * the ucode, e.g. unassociated RXON.
2218  */
2219 void
2220 il_clear_ucode_stations(struct il_priv *il)
2221 {
2222         int i;
2223         unsigned long flags_spin;
2224         bool cleared = false;
2225
2226         D_INFO("Clearing ucode stations in driver\n");
2227
2228         spin_lock_irqsave(&il->sta_lock, flags_spin);
2229         for (i = 0; i < il->hw_params.max_stations; i++) {
2230                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2231                         D_INFO("Clearing ucode active for station %d\n", i);
2232                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2233                         cleared = true;
2234                 }
2235         }
2236         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2237
2238         if (!cleared)
2239                 D_INFO("No active stations found to be cleared\n");
2240 }
2241 EXPORT_SYMBOL(il_clear_ucode_stations);
2242
2243 /**
2244  * il_restore_stations() - Restore driver known stations to device
2245  *
2246  * All stations considered active by driver, but not present in ucode, is
2247  * restored.
2248  *
2249  * Function sleeps.
2250  */
2251 void
2252 il_restore_stations(struct il_priv *il)
2253 {
2254         struct il_addsta_cmd sta_cmd;
2255         struct il_link_quality_cmd lq;
2256         unsigned long flags_spin;
2257         int i;
2258         bool found = false;
2259         int ret;
2260         bool send_lq;
2261
2262         if (!il_is_ready(il)) {
2263                 D_INFO("Not ready yet, not restoring any stations.\n");
2264                 return;
2265         }
2266
2267         D_ASSOC("Restoring all known stations ... start.\n");
2268         spin_lock_irqsave(&il->sta_lock, flags_spin);
2269         for (i = 0; i < il->hw_params.max_stations; i++) {
2270                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2271                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2272                         D_ASSOC("Restoring sta %pM\n",
2273                                 il->stations[i].sta.sta.addr);
2274                         il->stations[i].sta.mode = 0;
2275                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2276                         found = true;
2277                 }
2278         }
2279
2280         for (i = 0; i < il->hw_params.max_stations; i++) {
2281                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2282                         memcpy(&sta_cmd, &il->stations[i].sta,
2283                                sizeof(struct il_addsta_cmd));
2284                         send_lq = false;
2285                         if (il->stations[i].lq) {
2286                                 memcpy(&lq, il->stations[i].lq,
2287                                        sizeof(struct il_link_quality_cmd));
2288                                 send_lq = true;
2289                         }
2290                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2291                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2292                         if (ret) {
2293                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2294                                 IL_ERR("Adding station %pM failed.\n",
2295                                        il->stations[i].sta.sta.addr);
2296                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2297                                 il->stations[i].used &=
2298                                     ~IL_STA_UCODE_INPROGRESS;
2299                                 spin_unlock_irqrestore(&il->sta_lock,
2300                                                        flags_spin);
2301                         }
2302                         /*
2303                          * Rate scaling has already been initialized, send
2304                          * current LQ command
2305                          */
2306                         if (send_lq)
2307                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2308                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2309                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2310                 }
2311         }
2312
2313         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2314         if (!found)
2315                 D_INFO("Restoring all known stations"
2316                        " .... no stations to be restored.\n");
2317         else
2318                 D_INFO("Restoring all known stations" " .... complete.\n");
2319 }
2320 EXPORT_SYMBOL(il_restore_stations);
2321
2322 int
2323 il_get_free_ucode_key_idx(struct il_priv *il)
2324 {
2325         int i;
2326
2327         for (i = 0; i < il->sta_key_max_num; i++)
2328                 if (!test_and_set_bit(i, &il->ucode_key_table))
2329                         return i;
2330
2331         return WEP_INVALID_OFFSET;
2332 }
2333 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2334
2335 void
2336 il_dealloc_bcast_stations(struct il_priv *il)
2337 {
2338         unsigned long flags;
2339         int i;
2340
2341         spin_lock_irqsave(&il->sta_lock, flags);
2342         for (i = 0; i < il->hw_params.max_stations; i++) {
2343                 if (!(il->stations[i].used & IL_STA_BCAST))
2344                         continue;
2345
2346                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2347                 il->num_stations--;
2348                 BUG_ON(il->num_stations < 0);
2349                 kfree(il->stations[i].lq);
2350                 il->stations[i].lq = NULL;
2351         }
2352         spin_unlock_irqrestore(&il->sta_lock, flags);
2353 }
2354 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2355
2356 #ifdef CONFIG_IWLEGACY_DEBUG
2357 static void
2358 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2359 {
2360         int i;
2361         D_RATE("lq station id 0x%x\n", lq->sta_id);
2362         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2363                lq->general_params.dual_stream_ant_msk);
2364
2365         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2366                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2367 }
2368 #else
2369 static inline void
2370 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2371 {
2372 }
2373 #endif
2374
2375 /**
2376  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2377  *
2378  * It sometimes happens when a HT rate has been in use and we
2379  * loose connectivity with AP then mac80211 will first tell us that the
2380  * current channel is not HT anymore before removing the station. In such a
2381  * scenario the RXON flags will be updated to indicate we are not
2382  * communicating HT anymore, but the LQ command may still contain HT rates.
2383  * Test for this to prevent driver from sending LQ command between the time
2384  * RXON flags are updated and when LQ command is updated.
2385  */
2386 static bool
2387 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2388 {
2389         int i;
2390
2391         if (il->ht.enabled)
2392                 return true;
2393
2394         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2395         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2396                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2397                         D_INFO("idx %d of LQ expects HT channel\n", i);
2398                         return false;
2399                 }
2400         }
2401         return true;
2402 }
2403
2404 /**
2405  * il_send_lq_cmd() - Send link quality command
2406  * @init: This command is sent as part of station initialization right
2407  *        after station has been added.
2408  *
2409  * The link quality command is sent as the last step of station creation.
2410  * This is the special case in which init is set and we call a callback in
2411  * this case to clear the state indicating that station creation is in
2412  * progress.
2413  */
2414 int
2415 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2416                u8 flags, bool init)
2417 {
2418         int ret = 0;
2419         unsigned long flags_spin;
2420
2421         struct il_host_cmd cmd = {
2422                 .id = C_TX_LINK_QUALITY_CMD,
2423                 .len = sizeof(struct il_link_quality_cmd),
2424                 .flags = flags,
2425                 .data = lq,
2426         };
2427
2428         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2429                 return -EINVAL;
2430
2431         spin_lock_irqsave(&il->sta_lock, flags_spin);
2432         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2433                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2434                 return -EINVAL;
2435         }
2436         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2437
2438         il_dump_lq_cmd(il, lq);
2439         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2440
2441         if (il_is_lq_table_valid(il, lq))
2442                 ret = il_send_cmd(il, &cmd);
2443         else
2444                 ret = -EINVAL;
2445
2446         if (cmd.flags & CMD_ASYNC)
2447                 return ret;
2448
2449         if (init) {
2450                 D_INFO("init LQ command complete,"
2451                        " clearing sta addition status for sta %d\n",
2452                        lq->sta_id);
2453                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2454                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2455                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2456         }
2457         return ret;
2458 }
2459 EXPORT_SYMBOL(il_send_lq_cmd);
2460
2461 int
2462 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2463                   struct ieee80211_sta *sta)
2464 {
2465         struct il_priv *il = hw->priv;
2466         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2467         int ret;
2468
2469         mutex_lock(&il->mutex);
2470         D_MAC80211("enter station %pM\n", sta->addr);
2471
2472         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2473         if (ret)
2474                 IL_ERR("Error removing station %pM\n", sta->addr);
2475
2476         D_MAC80211("leave ret %d\n", ret);
2477         mutex_unlock(&il->mutex);
2478
2479         return ret;
2480 }
2481 EXPORT_SYMBOL(il_mac_sta_remove);
2482
2483 /************************** RX-FUNCTIONS ****************************/
2484 /*
2485  * Rx theory of operation
2486  *
2487  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2488  * each of which point to Receive Buffers to be filled by the NIC.  These get
2489  * used not only for Rx frames, but for any command response or notification
2490  * from the NIC.  The driver and NIC manage the Rx buffers by means
2491  * of idxes into the circular buffer.
2492  *
2493  * Rx Queue Indexes
2494  * The host/firmware share two idx registers for managing the Rx buffers.
2495  *
2496  * The READ idx maps to the first position that the firmware may be writing
2497  * to -- the driver can read up to (but not including) this position and get
2498  * good data.
2499  * The READ idx is managed by the firmware once the card is enabled.
2500  *
2501  * The WRITE idx maps to the last position the driver has read from -- the
2502  * position preceding WRITE is the last slot the firmware can place a packet.
2503  *
2504  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2505  * WRITE = READ.
2506  *
2507  * During initialization, the host sets up the READ queue position to the first
2508  * IDX position, and WRITE to the last (READ - 1 wrapped)
2509  *
2510  * When the firmware places a packet in a buffer, it will advance the READ idx
2511  * and fire the RX interrupt.  The driver can then query the READ idx and
2512  * process as many packets as possible, moving the WRITE idx forward as it
2513  * resets the Rx queue buffers with new memory.
2514  *
2515  * The management in the driver is as follows:
2516  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2517  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2518  *   to replenish the iwl->rxq->rx_free.
2519  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2520  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2521  *   'processed' and 'read' driver idxes as well)
2522  * + A received packet is processed and handed to the kernel network stack,
2523  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2524  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2525  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2526  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2527  *   were enough free buffers and RX_STALLED is set it is cleared.
2528  *
2529  *
2530  * Driver sequence:
2531  *
2532  * il_rx_queue_alloc()   Allocates rx_free
2533  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2534  *                            il_rx_queue_restock
2535  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2536  *                            queue, updates firmware pointers, and updates
2537  *                            the WRITE idx.  If insufficient rx_free buffers
2538  *                            are available, schedules il_rx_replenish
2539  *
2540  * -- enable interrupts --
2541  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2542  *                            READ IDX, detaching the SKB from the pool.
2543  *                            Moves the packet buffer from queue to rx_used.
2544  *                            Calls il_rx_queue_restock to refill any empty
2545  *                            slots.
2546  * ...
2547  *
2548  */
2549
2550 /**
2551  * il_rx_queue_space - Return number of free slots available in queue.
2552  */
2553 int
2554 il_rx_queue_space(const struct il_rx_queue *q)
2555 {
2556         int s = q->read - q->write;
2557         if (s <= 0)
2558                 s += RX_QUEUE_SIZE;
2559         /* keep some buffer to not confuse full and empty queue */
2560         s -= 2;
2561         if (s < 0)
2562                 s = 0;
2563         return s;
2564 }
2565 EXPORT_SYMBOL(il_rx_queue_space);
2566
2567 /**
2568  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2569  */
2570 void
2571 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2572 {
2573         unsigned long flags;
2574         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2575         u32 reg;
2576
2577         spin_lock_irqsave(&q->lock, flags);
2578
2579         if (q->need_update == 0)
2580                 goto exit_unlock;
2581
2582         /* If power-saving is in use, make sure device is awake */
2583         if (test_bit(S_POWER_PMI, &il->status)) {
2584                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2585
2586                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2587                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2588                                reg);
2589                         il_set_bit(il, CSR_GP_CNTRL,
2590                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2591                         goto exit_unlock;
2592                 }
2593
2594                 q->write_actual = (q->write & ~0x7);
2595                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2596
2597                 /* Else device is assumed to be awake */
2598         } else {
2599                 /* Device expects a multiple of 8 */
2600                 q->write_actual = (q->write & ~0x7);
2601                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2602         }
2603
2604         q->need_update = 0;
2605
2606 exit_unlock:
2607         spin_unlock_irqrestore(&q->lock, flags);
2608 }
2609 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2610
2611 int
2612 il_rx_queue_alloc(struct il_priv *il)
2613 {
2614         struct il_rx_queue *rxq = &il->rxq;
2615         struct device *dev = &il->pci_dev->dev;
2616         int i;
2617
2618         spin_lock_init(&rxq->lock);
2619         INIT_LIST_HEAD(&rxq->rx_free);
2620         INIT_LIST_HEAD(&rxq->rx_used);
2621
2622         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2623         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2624                                      GFP_KERNEL);
2625         if (!rxq->bd)
2626                 goto err_bd;
2627
2628         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2629                                           &rxq->rb_stts_dma, GFP_KERNEL);
2630         if (!rxq->rb_stts)
2631                 goto err_rb;
2632
2633         /* Fill the rx_used queue with _all_ of the Rx buffers */
2634         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2635                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2636
2637         /* Set us so that we have processed and used all buffers, but have
2638          * not restocked the Rx queue with fresh buffers */
2639         rxq->read = rxq->write = 0;
2640         rxq->write_actual = 0;
2641         rxq->free_count = 0;
2642         rxq->need_update = 0;
2643         return 0;
2644
2645 err_rb:
2646         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2647                           rxq->bd_dma);
2648 err_bd:
2649         return -ENOMEM;
2650 }
2651 EXPORT_SYMBOL(il_rx_queue_alloc);
2652
2653 void
2654 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2655 {
2656         struct il_rx_pkt *pkt = rxb_addr(rxb);
2657         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2658
2659         if (!report->state) {
2660                 D_11H("Spectrum Measure Notification: Start\n");
2661                 return;
2662         }
2663
2664         memcpy(&il->measure_report, report, sizeof(*report));
2665         il->measurement_status |= MEASUREMENT_READY;
2666 }
2667 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2668
2669 /*
2670  * returns non-zero if packet should be dropped
2671  */
2672 int
2673 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2674                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2675 {
2676         u16 fc = le16_to_cpu(hdr->frame_control);
2677
2678         /*
2679          * All contexts have the same setting here due to it being
2680          * a module parameter, so OK to check any context.
2681          */
2682         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2683                 return 0;
2684
2685         if (!(fc & IEEE80211_FCTL_PROTECTED))
2686                 return 0;
2687
2688         D_RX("decrypt_res:0x%x\n", decrypt_res);
2689         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2690         case RX_RES_STATUS_SEC_TYPE_TKIP:
2691                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2692                  * Decryption will be done in SW. */
2693                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2694                     RX_RES_STATUS_BAD_KEY_TTAK)
2695                         break;
2696
2697         case RX_RES_STATUS_SEC_TYPE_WEP:
2698                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2699                     RX_RES_STATUS_BAD_ICV_MIC) {
2700                         /* bad ICV, the packet is destroyed since the
2701                          * decryption is inplace, drop it */
2702                         D_RX("Packet destroyed\n");
2703                         return -1;
2704                 }
2705         case RX_RES_STATUS_SEC_TYPE_CCMP:
2706                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2707                     RX_RES_STATUS_DECRYPT_OK) {
2708                         D_RX("hw decrypt successfully!!!\n");
2709                         stats->flag |= RX_FLAG_DECRYPTED;
2710                 }
2711                 break;
2712
2713         default:
2714                 break;
2715         }
2716         return 0;
2717 }
2718 EXPORT_SYMBOL(il_set_decrypted_flag);
2719
2720 /**
2721  * il_txq_update_write_ptr - Send new write idx to hardware
2722  */
2723 void
2724 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2725 {
2726         u32 reg = 0;
2727         int txq_id = txq->q.id;
2728
2729         if (txq->need_update == 0)
2730                 return;
2731
2732         /* if we're trying to save power */
2733         if (test_bit(S_POWER_PMI, &il->status)) {
2734                 /* wake up nic if it's powered down ...
2735                  * uCode will wake up, and interrupt us again, so next
2736                  * time we'll skip this part. */
2737                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2738
2739                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2740                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2741                                txq_id, reg);
2742                         il_set_bit(il, CSR_GP_CNTRL,
2743                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2744                         return;
2745                 }
2746
2747                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2748
2749                 /*
2750                  * else not in power-save mode,
2751                  * uCode will never sleep when we're
2752                  * trying to tx (during RFKILL, we're not trying to tx).
2753                  */
2754         } else
2755                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2756         txq->need_update = 0;
2757 }
2758 EXPORT_SYMBOL(il_txq_update_write_ptr);
2759
2760 /**
2761  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2762  */
2763 void
2764 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2765 {
2766         struct il_tx_queue *txq = &il->txq[txq_id];
2767         struct il_queue *q = &txq->q;
2768
2769         if (q->n_bd == 0)
2770                 return;
2771
2772         while (q->write_ptr != q->read_ptr) {
2773                 il->ops->txq_free_tfd(il, txq);
2774                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2775         }
2776 }
2777 EXPORT_SYMBOL(il_tx_queue_unmap);
2778
2779 /**
2780  * il_tx_queue_free - Deallocate DMA queue.
2781  * @txq: Transmit queue to deallocate.
2782  *
2783  * Empty queue by removing and destroying all BD's.
2784  * Free all buffers.
2785  * 0-fill, but do not free "txq" descriptor structure.
2786  */
2787 void
2788 il_tx_queue_free(struct il_priv *il, int txq_id)
2789 {
2790         struct il_tx_queue *txq = &il->txq[txq_id];
2791         struct device *dev = &il->pci_dev->dev;
2792         int i;
2793
2794         il_tx_queue_unmap(il, txq_id);
2795
2796         /* De-alloc array of command/tx buffers */
2797         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2798                 kfree(txq->cmd[i]);
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         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2877                 kfree(txq->cmd[i]);
2878
2879         /* De-alloc circular buffer of TFDs */
2880         if (txq->q.n_bd)
2881                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2882                                   txq->tfds, txq->q.dma_addr);
2883
2884         /* deallocate arrays */
2885         kfree(txq->cmd);
2886         kfree(txq->meta);
2887         txq->cmd = NULL;
2888         txq->meta = NULL;
2889
2890         /* 0-fill queue descriptor structure */
2891         memset(txq, 0, sizeof(*txq));
2892 }
2893 EXPORT_SYMBOL(il_cmd_queue_free);
2894
2895 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2896  * DMA services
2897  *
2898  * Theory of operation
2899  *
2900  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2901  * of buffer descriptors, each of which points to one or more data buffers for
2902  * the device to read from or fill.  Driver and device exchange status of each
2903  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2904  * entries in each circular buffer, to protect against confusing empty and full
2905  * queue states.
2906  *
2907  * The device reads or writes the data in the queues via the device's several
2908  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2909  *
2910  * For Tx queue, there are low mark and high mark limits. If, after queuing
2911  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2912  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2913  * Tx queue resumed.
2914  *
2915  * See more detailed info in 4965.h.
2916  ***************************************************/
2917
2918 int
2919 il_queue_space(const struct il_queue *q)
2920 {
2921         int s = q->read_ptr - q->write_ptr;
2922
2923         if (q->read_ptr > q->write_ptr)
2924                 s -= q->n_bd;
2925
2926         if (s <= 0)
2927                 s += q->n_win;
2928         /* keep some reserve to not confuse empty and full situations */
2929         s -= 2;
2930         if (s < 0)
2931                 s = 0;
2932         return s;
2933 }
2934 EXPORT_SYMBOL(il_queue_space);
2935
2936
2937 /**
2938  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2939  */
2940 static int
2941 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2942 {
2943         /*
2944          * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2945          * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2946          */
2947         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2948         /* FIXME: remove q->n_bd */
2949         q->n_bd = TFD_QUEUE_SIZE_MAX;
2950
2951         q->n_win = slots;
2952         q->id = id;
2953
2954         /* slots_must be power-of-two size, otherwise
2955          * il_get_cmd_idx is broken. */
2956         BUG_ON(!is_power_of_2(slots));
2957
2958         q->low_mark = q->n_win / 4;
2959         if (q->low_mark < 4)
2960                 q->low_mark = 4;
2961
2962         q->high_mark = q->n_win / 8;
2963         if (q->high_mark < 2)
2964                 q->high_mark = 2;
2965
2966         q->write_ptr = q->read_ptr = 0;
2967
2968         return 0;
2969 }
2970
2971 /**
2972  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2973  */
2974 static int
2975 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2976 {
2977         struct device *dev = &il->pci_dev->dev;
2978         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2979
2980         /* Driver ilate data, only for Tx (not command) queues,
2981          * not shared with device. */
2982         if (id != il->cmd_queue) {
2983                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2984                                     sizeof(struct sk_buff *),
2985                                     GFP_KERNEL);
2986                 if (!txq->skbs) {
2987                         IL_ERR("Fail to alloc skbs\n");
2988                         goto error;
2989                 }
2990         } else
2991                 txq->skbs = NULL;
2992
2993         /* Circular buffer of transmit frame descriptors (TFDs),
2994          * shared with device */
2995         txq->tfds =
2996             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2997         if (!txq->tfds)
2998                 goto error;
2999
3000         txq->q.id = id;
3001
3002         return 0;
3003
3004 error:
3005         kfree(txq->skbs);
3006         txq->skbs = NULL;
3007
3008         return -ENOMEM;
3009 }
3010
3011 /**
3012  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3013  */
3014 int
3015 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3016 {
3017         int i, len, ret;
3018         int slots, actual_slots;
3019         struct il_tx_queue *txq = &il->txq[txq_id];
3020
3021         /*
3022          * Alloc buffer array for commands (Tx or other types of commands).
3023          * For the command queue (#4/#9), allocate command space + one big
3024          * command for scan, since scan command is very huge; the system will
3025          * not have two scans at the same time, so only one is needed.
3026          * For normal Tx queues (all other queues), no super-size command
3027          * space is needed.
3028          */
3029         if (txq_id == il->cmd_queue) {
3030                 slots = TFD_CMD_SLOTS;
3031                 actual_slots = slots + 1;
3032         } else {
3033                 slots = TFD_TX_CMD_SLOTS;
3034                 actual_slots = slots;
3035         }
3036
3037         txq->meta =
3038             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
3039         txq->cmd =
3040             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
3041
3042         if (!txq->meta || !txq->cmd)
3043                 goto out_free_arrays;
3044
3045         len = sizeof(struct il_device_cmd);
3046         for (i = 0; i < actual_slots; i++) {
3047                 /* only happens for cmd queue */
3048                 if (i == slots)
3049                         len = IL_MAX_CMD_SIZE;
3050
3051                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3052                 if (!txq->cmd[i])
3053                         goto err;
3054         }
3055
3056         /* Alloc driver data array and TFD circular buffer */
3057         ret = il_tx_queue_alloc(il, txq, txq_id);
3058         if (ret)
3059                 goto err;
3060
3061         txq->need_update = 0;
3062
3063         /*
3064          * For the default queues 0-3, set up the swq_id
3065          * already -- all others need to get one later
3066          * (if they need one at all).
3067          */
3068         if (txq_id < 4)
3069                 il_set_swq_id(txq, txq_id, txq_id);
3070
3071         /* Initialize queue's high/low-water marks, and head/tail idxes */
3072         il_queue_init(il, &txq->q, slots, txq_id);
3073
3074         /* Tell device where to find queue */
3075         il->ops->txq_init(il, txq);
3076
3077         return 0;
3078 err:
3079         for (i = 0; i < actual_slots; i++)
3080                 kfree(txq->cmd[i]);
3081 out_free_arrays:
3082         kfree(txq->meta);
3083         kfree(txq->cmd);
3084
3085         return -ENOMEM;
3086 }
3087 EXPORT_SYMBOL(il_tx_queue_init);
3088
3089 void
3090 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3091 {
3092         int slots, actual_slots;
3093         struct il_tx_queue *txq = &il->txq[txq_id];
3094
3095         if (txq_id == il->cmd_queue) {
3096                 slots = TFD_CMD_SLOTS;
3097                 actual_slots = TFD_CMD_SLOTS + 1;
3098         } else {
3099                 slots = TFD_TX_CMD_SLOTS;
3100                 actual_slots = TFD_TX_CMD_SLOTS;
3101         }
3102
3103         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3104         txq->need_update = 0;
3105
3106         /* Initialize queue's high/low-water marks, and head/tail idxes */
3107         il_queue_init(il, &txq->q, slots, txq_id);
3108
3109         /* Tell device where to find queue */
3110         il->ops->txq_init(il, txq);
3111 }
3112 EXPORT_SYMBOL(il_tx_queue_reset);
3113
3114 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3115
3116 /**
3117  * il_enqueue_hcmd - enqueue a uCode command
3118  * @il: device ilate data point
3119  * @cmd: a point to the ucode command structure
3120  *
3121  * The function returns < 0 values to indicate the operation is
3122  * failed. On success, it turns the idx (> 0) of command in the
3123  * command queue.
3124  */
3125 int
3126 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3127 {
3128         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3129         struct il_queue *q = &txq->q;
3130         struct il_device_cmd *out_cmd;
3131         struct il_cmd_meta *out_meta;
3132         dma_addr_t phys_addr;
3133         unsigned long flags;
3134         int len;
3135         u32 idx;
3136         u16 fix_size;
3137
3138         cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3139         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3140
3141         /* If any of the command structures end up being larger than
3142          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3143          * we will need to increase the size of the TFD entries
3144          * Also, check to see if command buffer should not exceed the size
3145          * of device_cmd and max_cmd_size. */
3146         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3147                !(cmd->flags & CMD_SIZE_HUGE));
3148         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3149
3150         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3151                 IL_WARN("Not sending command - %s KILL\n",
3152                         il_is_rfkill(il) ? "RF" : "CT");
3153                 return -EIO;
3154         }
3155
3156         spin_lock_irqsave(&il->hcmd_lock, flags);
3157
3158         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3159                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3160
3161                 IL_ERR("Restarting adapter due to command queue full\n");
3162                 queue_work(il->workqueue, &il->restart);
3163                 return -ENOSPC;
3164         }
3165
3166         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3167         out_cmd = txq->cmd[idx];
3168         out_meta = &txq->meta[idx];
3169
3170         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3171                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3172                 return -ENOSPC;
3173         }
3174
3175         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3176         out_meta->flags = cmd->flags | CMD_MAPPED;
3177         if (cmd->flags & CMD_WANT_SKB)
3178                 out_meta->source = cmd;
3179         if (cmd->flags & CMD_ASYNC)
3180                 out_meta->callback = cmd->callback;
3181
3182         out_cmd->hdr.cmd = cmd->id;
3183         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3184
3185         /* At this point, the out_cmd now has all of the incoming cmd
3186          * information */
3187
3188         out_cmd->hdr.flags = 0;
3189         out_cmd->hdr.sequence =
3190             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3191         if (cmd->flags & CMD_SIZE_HUGE)
3192                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3193         len = sizeof(struct il_device_cmd);
3194         if (idx == TFD_CMD_SLOTS)
3195                 len = IL_MAX_CMD_SIZE;
3196
3197 #ifdef CONFIG_IWLEGACY_DEBUG
3198         switch (out_cmd->hdr.cmd) {
3199         case C_TX_LINK_QUALITY_CMD:
3200         case C_SENSITIVITY:
3201                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3202                           "%d bytes at %d[%d]:%d\n",
3203                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3204                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3205                           q->write_ptr, idx, il->cmd_queue);
3206                 break;
3207         default:
3208                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3209                      "%d bytes at %d[%d]:%d\n",
3210                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3211                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3212                      idx, il->cmd_queue);
3213         }
3214 #endif
3215
3216         phys_addr =
3217             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3218                            PCI_DMA_BIDIRECTIONAL);
3219         if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3220                 idx = -ENOMEM;
3221                 goto out;
3222         }
3223         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3224         dma_unmap_len_set(out_meta, len, fix_size);
3225
3226         txq->need_update = 1;
3227
3228         if (il->ops->txq_update_byte_cnt_tbl)
3229                 /* Set up entry in queue's byte count circular buffer */
3230                 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3231
3232         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3233                                             U32_PAD(cmd->len));
3234
3235         /* Increment and update queue's write idx */
3236         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3237         il_txq_update_write_ptr(il, txq);
3238
3239 out:
3240         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3241         return idx;
3242 }
3243
3244 /**
3245  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3246  *
3247  * When FW advances 'R' idx, all entries between old and new 'R' idx
3248  * need to be reclaimed. As result, some free space forms.  If there is
3249  * enough free space (> low mark), wake the stack that feeds us.
3250  */
3251 static void
3252 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3253 {
3254         struct il_tx_queue *txq = &il->txq[txq_id];
3255         struct il_queue *q = &txq->q;
3256         int nfreed = 0;
3257
3258         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3259                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3260                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3261                        q->write_ptr, q->read_ptr);
3262                 return;
3263         }
3264
3265         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3266              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3267
3268                 if (nfreed++ > 0) {
3269                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3270                                q->write_ptr, q->read_ptr);
3271                         queue_work(il->workqueue, &il->restart);
3272                 }
3273
3274         }
3275 }
3276
3277 /**
3278  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3279  * @rxb: Rx buffer to reclaim
3280  *
3281  * If an Rx buffer has an async callback associated with it the callback
3282  * will be executed.  The attached skb (if present) will only be freed
3283  * if the callback returns 1
3284  */
3285 void
3286 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3287 {
3288         struct il_rx_pkt *pkt = rxb_addr(rxb);
3289         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3290         int txq_id = SEQ_TO_QUEUE(sequence);
3291         int idx = SEQ_TO_IDX(sequence);
3292         int cmd_idx;
3293         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3294         struct il_device_cmd *cmd;
3295         struct il_cmd_meta *meta;
3296         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3297         unsigned long flags;
3298
3299         /* If a Tx command is being handled and it isn't in the actual
3300          * command queue then there a command routing bug has been introduced
3301          * in the queue management code. */
3302         if (WARN
3303             (txq_id != il->cmd_queue,
3304              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3305              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3306              il->txq[il->cmd_queue].q.write_ptr)) {
3307                 il_print_hex_error(il, pkt, 32);
3308                 return;
3309         }
3310
3311         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3312         cmd = txq->cmd[cmd_idx];
3313         meta = &txq->meta[cmd_idx];
3314
3315         txq->time_stamp = jiffies;
3316
3317         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3318                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3319
3320         /* Input error checking is done when commands are added to queue. */
3321         if (meta->flags & CMD_WANT_SKB) {
3322                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3323                 rxb->page = NULL;
3324         } else if (meta->callback)
3325                 meta->callback(il, cmd, pkt);
3326
3327         spin_lock_irqsave(&il->hcmd_lock, flags);
3328
3329         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3330
3331         if (!(meta->flags & CMD_ASYNC)) {
3332                 clear_bit(S_HCMD_ACTIVE, &il->status);
3333                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3334                        il_get_cmd_string(cmd->hdr.cmd));
3335                 wake_up(&il->wait_command_queue);
3336         }
3337
3338         /* Mark as unmapped */
3339         meta->flags = 0;
3340
3341         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3342 }
3343 EXPORT_SYMBOL(il_tx_cmd_complete);
3344
3345 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3346 MODULE_VERSION(IWLWIFI_VERSION);
3347 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3348 MODULE_LICENSE("GPL");
3349
3350 /*
3351  * set bt_coex_active to true, uCode will do kill/defer
3352  * every time the priority line is asserted (BT is sending signals on the
3353  * priority line in the PCIx).
3354  * set bt_coex_active to false, uCode will ignore the BT activity and
3355  * perform the normal operation
3356  *
3357  * User might experience transmit issue on some platform due to WiFi/BT
3358  * co-exist problem. The possible behaviors are:
3359  *   Able to scan and finding all the available AP
3360  *   Not able to associate with any AP
3361  * On those platforms, WiFi communication can be restored by set
3362  * "bt_coex_active" module parameter to "false"
3363  *
3364  * default: bt_coex_active = true (BT_COEX_ENABLE)
3365  */
3366 static bool bt_coex_active = true;
3367 module_param(bt_coex_active, bool, S_IRUGO);
3368 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3369
3370 u32 il_debug_level;
3371 EXPORT_SYMBOL(il_debug_level);
3372
3373 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3374 EXPORT_SYMBOL(il_bcast_addr);
3375
3376 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3377 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3378 static void
3379 il_init_ht_hw_capab(const struct il_priv *il,
3380                     struct ieee80211_sta_ht_cap *ht_info,
3381                     enum ieee80211_band band)
3382 {
3383         u16 max_bit_rate = 0;
3384         u8 rx_chains_num = il->hw_params.rx_chains_num;
3385         u8 tx_chains_num = il->hw_params.tx_chains_num;
3386
3387         ht_info->cap = 0;
3388         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3389
3390         ht_info->ht_supported = true;
3391
3392         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3393         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3394         if (il->hw_params.ht40_channel & BIT(band)) {
3395                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3396                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3397                 ht_info->mcs.rx_mask[4] = 0x01;
3398                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3399         }
3400
3401         if (il->cfg->mod_params->amsdu_size_8K)
3402                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3403
3404         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3405         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3406
3407         ht_info->mcs.rx_mask[0] = 0xFF;
3408         if (rx_chains_num >= 2)
3409                 ht_info->mcs.rx_mask[1] = 0xFF;
3410         if (rx_chains_num >= 3)
3411                 ht_info->mcs.rx_mask[2] = 0xFF;
3412
3413         /* Highest supported Rx data rate */
3414         max_bit_rate *= rx_chains_num;
3415         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3416         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3417
3418         /* Tx MCS capabilities */
3419         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3420         if (tx_chains_num != rx_chains_num) {
3421                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3422                 ht_info->mcs.tx_params |=
3423                     ((tx_chains_num -
3424                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3425         }
3426 }
3427
3428 /**
3429  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3430  */
3431 int
3432 il_init_geos(struct il_priv *il)
3433 {
3434         struct il_channel_info *ch;
3435         struct ieee80211_supported_band *sband;
3436         struct ieee80211_channel *channels;
3437         struct ieee80211_channel *geo_ch;
3438         struct ieee80211_rate *rates;
3439         int i = 0;
3440         s8 max_tx_power = 0;
3441
3442         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3443             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3444                 D_INFO("Geography modes already initialized.\n");
3445                 set_bit(S_GEO_CONFIGURED, &il->status);
3446                 return 0;
3447         }
3448
3449         channels =
3450             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3451                     GFP_KERNEL);
3452         if (!channels)
3453                 return -ENOMEM;
3454
3455         rates =
3456             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3457                     GFP_KERNEL);
3458         if (!rates) {
3459                 kfree(channels);
3460                 return -ENOMEM;
3461         }
3462
3463         /* 5.2GHz channels start after the 2.4GHz channels */
3464         sband = &il->bands[IEEE80211_BAND_5GHZ];
3465         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3466         /* just OFDM */
3467         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3468         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3469
3470         if (il->cfg->sku & IL_SKU_N)
3471                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ);
3472
3473         sband = &il->bands[IEEE80211_BAND_2GHZ];
3474         sband->channels = channels;
3475         /* OFDM & CCK */
3476         sband->bitrates = rates;
3477         sband->n_bitrates = RATE_COUNT_LEGACY;
3478
3479         if (il->cfg->sku & IL_SKU_N)
3480                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ);
3481
3482         il->ieee_channels = channels;
3483         il->ieee_rates = rates;
3484
3485         for (i = 0; i < il->channel_count; i++) {
3486                 ch = &il->channel_info[i];
3487
3488                 if (!il_is_channel_valid(ch))
3489                         continue;
3490
3491                 sband = &il->bands[ch->band];
3492
3493                 geo_ch = &sband->channels[sband->n_channels++];
3494
3495                 geo_ch->center_freq =
3496                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3497                 geo_ch->max_power = ch->max_power_avg;
3498                 geo_ch->max_antenna_gain = 0xff;
3499                 geo_ch->hw_value = ch->channel;
3500
3501                 if (il_is_channel_valid(ch)) {
3502                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3503                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3504
3505                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3506                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3507
3508                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3509                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3510
3511                         geo_ch->flags |= ch->ht40_extension_channel;
3512
3513                         if (ch->max_power_avg > max_tx_power)
3514                                 max_tx_power = ch->max_power_avg;
3515                 } else {
3516                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3517                 }
3518
3519                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3520                        geo_ch->center_freq,
3521                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3522                        geo_ch->
3523                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3524                        geo_ch->flags);
3525         }
3526
3527         il->tx_power_device_lmt = max_tx_power;
3528         il->tx_power_user_lmt = max_tx_power;
3529         il->tx_power_next = max_tx_power;
3530
3531         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3532             (il->cfg->sku & IL_SKU_A)) {
3533                 IL_INFO("Incorrectly detected BG card as ABG. "
3534                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3535                         il->pci_dev->device, il->pci_dev->subsystem_device);
3536                 il->cfg->sku &= ~IL_SKU_A;
3537         }
3538
3539         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3540                 il->bands[IEEE80211_BAND_2GHZ].n_channels,
3541                 il->bands[IEEE80211_BAND_5GHZ].n_channels);
3542
3543         set_bit(S_GEO_CONFIGURED, &il->status);
3544
3545         return 0;
3546 }
3547 EXPORT_SYMBOL(il_init_geos);
3548
3549 /*
3550  * il_free_geos - undo allocations in il_init_geos
3551  */
3552 void
3553 il_free_geos(struct il_priv *il)
3554 {
3555         kfree(il->ieee_channels);
3556         kfree(il->ieee_rates);
3557         clear_bit(S_GEO_CONFIGURED, &il->status);
3558 }
3559 EXPORT_SYMBOL(il_free_geos);
3560
3561 static bool
3562 il_is_channel_extension(struct il_priv *il, enum ieee80211_band band,
3563                         u16 channel, u8 extension_chan_offset)
3564 {
3565         const struct il_channel_info *ch_info;
3566
3567         ch_info = il_get_channel_info(il, band, channel);
3568         if (!il_is_channel_valid(ch_info))
3569                 return false;
3570
3571         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3572                 return !(ch_info->
3573                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3574         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3575                 return !(ch_info->
3576                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3577
3578         return false;
3579 }
3580
3581 bool
3582 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3583 {
3584         if (!il->ht.enabled || !il->ht.is_40mhz)
3585                 return false;
3586
3587         /*
3588          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3589          * the bit will not set if it is pure 40MHz case
3590          */
3591         if (ht_cap && !ht_cap->ht_supported)
3592                 return false;
3593
3594 #ifdef CONFIG_IWLEGACY_DEBUGFS
3595         if (il->disable_ht40)
3596                 return false;
3597 #endif
3598
3599         return il_is_channel_extension(il, il->band,
3600                                        le16_to_cpu(il->staging.channel),
3601                                        il->ht.extension_chan_offset);
3602 }
3603 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3604
3605 static u16
3606 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3607 {
3608         u16 new_val;
3609         u16 beacon_factor;
3610
3611         /*
3612          * If mac80211 hasn't given us a beacon interval, program
3613          * the default into the device.
3614          */
3615         if (!beacon_val)
3616                 return DEFAULT_BEACON_INTERVAL;
3617
3618         /*
3619          * If the beacon interval we obtained from the peer
3620          * is too large, we'll have to wake up more often
3621          * (and in IBSS case, we'll beacon too much)
3622          *
3623          * For example, if max_beacon_val is 4096, and the
3624          * requested beacon interval is 7000, we'll have to
3625          * use 3500 to be able to wake up on the beacons.
3626          *
3627          * This could badly influence beacon detection stats.
3628          */
3629
3630         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3631         new_val = beacon_val / beacon_factor;
3632
3633         if (!new_val)
3634                 new_val = max_beacon_val;
3635
3636         return new_val;
3637 }
3638
3639 int
3640 il_send_rxon_timing(struct il_priv *il)
3641 {
3642         u64 tsf;
3643         s32 interval_tm, rem;
3644         struct ieee80211_conf *conf = NULL;
3645         u16 beacon_int;
3646         struct ieee80211_vif *vif = il->vif;
3647
3648         conf = &il->hw->conf;
3649
3650         lockdep_assert_held(&il->mutex);
3651
3652         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3653
3654         il->timing.timestamp = cpu_to_le64(il->timestamp);
3655         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3656
3657         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3658
3659         /*
3660          * TODO: For IBSS we need to get atim_win from mac80211,
3661          *       for now just always use 0
3662          */
3663         il->timing.atim_win = 0;
3664
3665         beacon_int =
3666             il_adjust_beacon_interval(beacon_int,
3667                                       il->hw_params.max_beacon_itrvl *
3668                                       TIME_UNIT);
3669         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3670
3671         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3672         interval_tm = beacon_int * TIME_UNIT;
3673         rem = do_div(tsf, interval_tm);
3674         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3675
3676         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3677
3678         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3679                 le16_to_cpu(il->timing.beacon_interval),
3680                 le32_to_cpu(il->timing.beacon_init_val),
3681                 le16_to_cpu(il->timing.atim_win));
3682
3683         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3684                                &il->timing);
3685 }
3686 EXPORT_SYMBOL(il_send_rxon_timing);
3687
3688 void
3689 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3690 {
3691         struct il_rxon_cmd *rxon = &il->staging;
3692
3693         if (hw_decrypt)
3694                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3695         else
3696                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3697
3698 }
3699 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3700
3701 /* validate RXON structure is valid */
3702 int
3703 il_check_rxon_cmd(struct il_priv *il)
3704 {
3705         struct il_rxon_cmd *rxon = &il->staging;
3706         bool error = false;
3707
3708         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3709                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3710                         IL_WARN("check 2.4G: wrong narrow\n");
3711                         error = true;
3712                 }
3713                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3714                         IL_WARN("check 2.4G: wrong radar\n");
3715                         error = true;
3716                 }
3717         } else {
3718                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3719                         IL_WARN("check 5.2G: not short slot!\n");
3720                         error = true;
3721                 }
3722                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3723                         IL_WARN("check 5.2G: CCK!\n");
3724                         error = true;
3725                 }
3726         }
3727         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3728                 IL_WARN("mac/bssid mcast!\n");
3729                 error = true;
3730         }
3731
3732         /* make sure basic rates 6Mbps and 1Mbps are supported */
3733         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3734             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3735                 IL_WARN("neither 1 nor 6 are basic\n");
3736                 error = true;
3737         }
3738
3739         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3740                 IL_WARN("aid > 2007\n");
3741                 error = true;
3742         }
3743
3744         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3745             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3746                 IL_WARN("CCK and short slot\n");
3747                 error = true;
3748         }
3749
3750         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3751             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3752                 IL_WARN("CCK and auto detect");
3753                 error = true;
3754         }
3755
3756         if ((rxon->
3757              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3758             RXON_FLG_TGG_PROTECT_MSK) {
3759                 IL_WARN("TGg but no auto-detect\n");
3760                 error = true;
3761         }
3762
3763         if (error)
3764                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3765
3766         if (error) {
3767                 IL_ERR("Invalid RXON\n");
3768                 return -EINVAL;
3769         }
3770         return 0;
3771 }
3772 EXPORT_SYMBOL(il_check_rxon_cmd);
3773
3774 /**
3775  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3776  * @il: staging_rxon is compared to active_rxon
3777  *
3778  * If the RXON structure is changing enough to require a new tune,
3779  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3780  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3781  */
3782 int
3783 il_full_rxon_required(struct il_priv *il)
3784 {
3785         const struct il_rxon_cmd *staging = &il->staging;
3786         const struct il_rxon_cmd *active = &il->active;
3787
3788 #define CHK(cond)                                                       \
3789         if ((cond)) {                                                   \
3790                 D_INFO("need full RXON - " #cond "\n"); \
3791                 return 1;                                               \
3792         }
3793
3794 #define CHK_NEQ(c1, c2)                                         \
3795         if ((c1) != (c2)) {                                     \
3796                 D_INFO("need full RXON - "      \
3797                                #c1 " != " #c2 " - %d != %d\n",  \
3798                                (c1), (c2));                     \
3799                 return 1;                                       \
3800         }
3801
3802         /* These items are only settable from the full RXON command */
3803         CHK(!il_is_associated(il));
3804         CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3805         CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3806         CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3807                                      active->wlap_bssid_addr));
3808         CHK_NEQ(staging->dev_type, active->dev_type);
3809         CHK_NEQ(staging->channel, active->channel);
3810         CHK_NEQ(staging->air_propagation, active->air_propagation);
3811         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3812                 active->ofdm_ht_single_stream_basic_rates);
3813         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3814                 active->ofdm_ht_dual_stream_basic_rates);
3815         CHK_NEQ(staging->assoc_id, active->assoc_id);
3816
3817         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3818          * be updated with the RXON_ASSOC command -- however only some
3819          * flag transitions are allowed using RXON_ASSOC */
3820
3821         /* Check if we are not switching bands */
3822         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3823                 active->flags & RXON_FLG_BAND_24G_MSK);
3824
3825         /* Check if we are switching association toggle */
3826         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3827                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3828
3829 #undef CHK
3830 #undef CHK_NEQ
3831
3832         return 0;
3833 }
3834 EXPORT_SYMBOL(il_full_rxon_required);
3835
3836 u8
3837 il_get_lowest_plcp(struct il_priv *il)
3838 {
3839         /*
3840          * Assign the lowest rate -- should really get this from
3841          * the beacon skb from mac80211.
3842          */
3843         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3844                 return RATE_1M_PLCP;
3845         else
3846                 return RATE_6M_PLCP;
3847 }
3848 EXPORT_SYMBOL(il_get_lowest_plcp);
3849
3850 static void
3851 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3852 {
3853         struct il_rxon_cmd *rxon = &il->staging;
3854
3855         if (!il->ht.enabled) {
3856                 rxon->flags &=
3857                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3858                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3859                       | RXON_FLG_HT_PROT_MSK);
3860                 return;
3861         }
3862
3863         rxon->flags |=
3864             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3865
3866         /* Set up channel bandwidth:
3867          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3868         /* clear the HT channel mode before set the mode */
3869         rxon->flags &=
3870             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3871         if (il_is_ht40_tx_allowed(il, NULL)) {
3872                 /* pure ht40 */
3873                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3874                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3875                         /* Note: control channel is opposite of extension channel */
3876                         switch (il->ht.extension_chan_offset) {
3877                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3878                                 rxon->flags &=
3879                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3880                                 break;
3881                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3882                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3883                                 break;
3884                         }
3885                 } else {
3886                         /* Note: control channel is opposite of extension channel */
3887                         switch (il->ht.extension_chan_offset) {
3888                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3889                                 rxon->flags &=
3890                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3891                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3892                                 break;
3893                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3894                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3895                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3896                                 break;
3897                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3898                         default:
3899                                 /* channel location only valid if in Mixed mode */
3900                                 IL_ERR("invalid extension channel offset\n");
3901                                 break;
3902                         }
3903                 }
3904         } else {
3905                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3906         }
3907
3908         if (il->ops->set_rxon_chain)
3909                 il->ops->set_rxon_chain(il);
3910
3911         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3912                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3913                 il->ht.protection, il->ht.extension_chan_offset);
3914 }
3915
3916 void
3917 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3918 {
3919         _il_set_rxon_ht(il, ht_conf);
3920 }
3921 EXPORT_SYMBOL(il_set_rxon_ht);
3922
3923 /* Return valid, unused, channel for a passive scan to reset the RF */
3924 u8
3925 il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band)
3926 {
3927         const struct il_channel_info *ch_info;
3928         int i;
3929         u8 channel = 0;
3930         u8 min, max;
3931
3932         if (band == IEEE80211_BAND_5GHZ) {
3933                 min = 14;
3934                 max = il->channel_count;
3935         } else {
3936                 min = 0;
3937                 max = 14;
3938         }
3939
3940         for (i = min; i < max; i++) {
3941                 channel = il->channel_info[i].channel;
3942                 if (channel == le16_to_cpu(il->staging.channel))
3943                         continue;
3944
3945                 ch_info = il_get_channel_info(il, band, channel);
3946                 if (il_is_channel_valid(ch_info))
3947                         break;
3948         }
3949
3950         return channel;
3951 }
3952 EXPORT_SYMBOL(il_get_single_channel_number);
3953
3954 /**
3955  * il_set_rxon_channel - Set the band and channel values in staging RXON
3956  * @ch: requested channel as a pointer to struct ieee80211_channel
3957
3958  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3959  * in the staging RXON flag structure based on the ch->band
3960  */
3961 int
3962 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3963 {
3964         enum ieee80211_band band = ch->band;
3965         u16 channel = ch->hw_value;
3966
3967         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3968                 return 0;
3969
3970         il->staging.channel = cpu_to_le16(channel);
3971         if (band == IEEE80211_BAND_5GHZ)
3972                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3973         else
3974                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3975
3976         il->band = band;
3977
3978         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3979
3980         return 0;
3981 }
3982 EXPORT_SYMBOL(il_set_rxon_channel);
3983
3984 void
3985 il_set_flags_for_band(struct il_priv *il, enum ieee80211_band band,
3986                       struct ieee80211_vif *vif)
3987 {
3988         if (band == IEEE80211_BAND_5GHZ) {
3989                 il->staging.flags &=
3990                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3991                       RXON_FLG_CCK_MSK);
3992                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3993         } else {
3994                 /* Copied from il_post_associate() */
3995                 if (vif && vif->bss_conf.use_short_slot)
3996                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3997                 else
3998                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3999
4000                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
4001                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
4002                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
4003         }
4004 }
4005 EXPORT_SYMBOL(il_set_flags_for_band);
4006
4007 /*
4008  * initialize rxon structure with default values from eeprom
4009  */
4010 void
4011 il_connection_init_rx_config(struct il_priv *il)
4012 {
4013         const struct il_channel_info *ch_info;
4014
4015         memset(&il->staging, 0, sizeof(il->staging));
4016
4017         switch (il->iw_mode) {
4018         case NL80211_IFTYPE_UNSPECIFIED:
4019                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4020                 break;
4021         case NL80211_IFTYPE_STATION:
4022                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4023                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4024                 break;
4025         case NL80211_IFTYPE_ADHOC:
4026                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4027                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4028                 il->staging.filter_flags =
4029                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4030                 break;
4031         default:
4032                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4033                 return;
4034         }
4035
4036 #if 0
4037         /* TODO:  Figure out when short_preamble would be set and cache from
4038          * that */
4039         if (!hw_to_local(il->hw)->short_preamble)
4040                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4041         else
4042                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4043 #endif
4044
4045         ch_info =
4046             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4047
4048         if (!ch_info)
4049                 ch_info = &il->channel_info[0];
4050
4051         il->staging.channel = cpu_to_le16(ch_info->channel);
4052         il->band = ch_info->band;
4053
4054         il_set_flags_for_band(il, il->band, il->vif);
4055
4056         il->staging.ofdm_basic_rates =
4057             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4058         il->staging.cck_basic_rates =
4059             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4060
4061         /* clear both MIX and PURE40 mode flag */
4062         il->staging.flags &=
4063             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4064         if (il->vif)
4065                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4066
4067         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4068         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4069 }
4070 EXPORT_SYMBOL(il_connection_init_rx_config);
4071
4072 void
4073 il_set_rate(struct il_priv *il)
4074 {
4075         const struct ieee80211_supported_band *hw = NULL;
4076         struct ieee80211_rate *rate;
4077         int i;
4078
4079         hw = il_get_hw_mode(il, il->band);
4080         if (!hw) {
4081                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4082                 return;
4083         }
4084
4085         il->active_rate = 0;
4086
4087         for (i = 0; i < hw->n_bitrates; i++) {
4088                 rate = &(hw->bitrates[i]);
4089                 if (rate->hw_value < RATE_COUNT_LEGACY)
4090                         il->active_rate |= (1 << rate->hw_value);
4091         }
4092
4093         D_RATE("Set active_rate = %0x\n", il->active_rate);
4094
4095         il->staging.cck_basic_rates =
4096             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4097
4098         il->staging.ofdm_basic_rates =
4099             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4100 }
4101 EXPORT_SYMBOL(il_set_rate);
4102
4103 void
4104 il_chswitch_done(struct il_priv *il, bool is_success)
4105 {
4106         if (test_bit(S_EXIT_PENDING, &il->status))
4107                 return;
4108
4109         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4110                 ieee80211_chswitch_done(il->vif, is_success);
4111 }
4112 EXPORT_SYMBOL(il_chswitch_done);
4113
4114 void
4115 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4116 {
4117         struct il_rx_pkt *pkt = rxb_addr(rxb);
4118         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4119         struct il_rxon_cmd *rxon = (void *)&il->active;
4120
4121         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4122                 return;
4123
4124         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4125                 rxon->channel = csa->channel;
4126                 il->staging.channel = csa->channel;
4127                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4128                 il_chswitch_done(il, true);
4129         } else {
4130                 IL_ERR("CSA notif (fail) : channel %d\n",
4131                        le16_to_cpu(csa->channel));
4132                 il_chswitch_done(il, false);
4133         }
4134 }
4135 EXPORT_SYMBOL(il_hdl_csa);
4136
4137 #ifdef CONFIG_IWLEGACY_DEBUG
4138 void
4139 il_print_rx_config_cmd(struct il_priv *il)
4140 {
4141         struct il_rxon_cmd *rxon = &il->staging;
4142
4143         D_RADIO("RX CONFIG:\n");
4144         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4145         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4146         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4147         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4148         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4149         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4150         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4151         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4152         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4153         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4154 }
4155 EXPORT_SYMBOL(il_print_rx_config_cmd);
4156 #endif
4157 /**
4158  * il_irq_handle_error - called for HW or SW error interrupt from card
4159  */
4160 void
4161 il_irq_handle_error(struct il_priv *il)
4162 {
4163         /* Set the FW error flag -- cleared on il_down */
4164         set_bit(S_FW_ERROR, &il->status);
4165
4166         /* Cancel currently queued command. */
4167         clear_bit(S_HCMD_ACTIVE, &il->status);
4168
4169         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4170
4171         il->ops->dump_nic_error_log(il);
4172         if (il->ops->dump_fh)
4173                 il->ops->dump_fh(il, NULL, false);
4174 #ifdef CONFIG_IWLEGACY_DEBUG
4175         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4176                 il_print_rx_config_cmd(il);
4177 #endif
4178
4179         wake_up(&il->wait_command_queue);
4180
4181         /* Keep the restart process from trying to send host
4182          * commands by clearing the INIT status bit */
4183         clear_bit(S_READY, &il->status);
4184
4185         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4186                 IL_DBG(IL_DL_FW_ERRORS,
4187                        "Restarting adapter due to uCode error.\n");
4188
4189                 if (il->cfg->mod_params->restart_fw)
4190                         queue_work(il->workqueue, &il->restart);
4191         }
4192 }
4193 EXPORT_SYMBOL(il_irq_handle_error);
4194
4195 static int
4196 _il_apm_stop_master(struct il_priv *il)
4197 {
4198         int ret = 0;
4199
4200         /* stop device's busmaster DMA activity */
4201         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4202
4203         ret =
4204             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4205                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4206         if (ret < 0)
4207                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4208
4209         D_INFO("stop master\n");
4210
4211         return ret;
4212 }
4213
4214 void
4215 _il_apm_stop(struct il_priv *il)
4216 {
4217         lockdep_assert_held(&il->reg_lock);
4218
4219         D_INFO("Stop card, put in low power state\n");
4220
4221         /* Stop device's DMA activity */
4222         _il_apm_stop_master(il);
4223
4224         /* Reset the entire device */
4225         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4226
4227         udelay(10);
4228
4229         /*
4230          * Clear "initialization complete" bit to move adapter from
4231          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4232          */
4233         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4234 }
4235 EXPORT_SYMBOL(_il_apm_stop);
4236
4237 void
4238 il_apm_stop(struct il_priv *il)
4239 {
4240         unsigned long flags;
4241
4242         spin_lock_irqsave(&il->reg_lock, flags);
4243         _il_apm_stop(il);
4244         spin_unlock_irqrestore(&il->reg_lock, flags);
4245 }
4246 EXPORT_SYMBOL(il_apm_stop);
4247
4248 /*
4249  * Start up NIC's basic functionality after it has been reset
4250  * (e.g. after platform boot, or shutdown via il_apm_stop())
4251  * NOTE:  This does not load uCode nor start the embedded processor
4252  */
4253 int
4254 il_apm_init(struct il_priv *il)
4255 {
4256         int ret = 0;
4257         u16 lctl;
4258
4259         D_INFO("Init card's basic functions\n");
4260
4261         /*
4262          * Use "set_bit" below rather than "write", to preserve any hardware
4263          * bits already set by default after reset.
4264          */
4265
4266         /* Disable L0S exit timer (platform NMI Work/Around) */
4267         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4268                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4269
4270         /*
4271          * Disable L0s without affecting L1;
4272          *  don't wait for ICH L0s (ICH bug W/A)
4273          */
4274         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4275                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4276
4277         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4278         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4279
4280         /*
4281          * Enable HAP INTA (interrupt from management bus) to
4282          * wake device's PCI Express link L1a -> L0s
4283          * NOTE:  This is no-op for 3945 (non-existent bit)
4284          */
4285         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4286                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4287
4288         /*
4289          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4290          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4291          * If so (likely), disable L0S, so device moves directly L0->L1;
4292          *    costs negligible amount of power savings.
4293          * If not (unlikely), enable L0S, so there is at least some
4294          *    power savings, even without L1.
4295          */
4296         if (il->cfg->set_l0s) {
4297                 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4298                 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4299                         /* L1-ASPM enabled; disable(!) L0S  */
4300                         il_set_bit(il, CSR_GIO_REG,
4301                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4302                         D_POWER("L1 Enabled; Disabling L0S\n");
4303                 } else {
4304                         /* L1-ASPM disabled; enable(!) L0S */
4305                         il_clear_bit(il, CSR_GIO_REG,
4306                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4307                         D_POWER("L1 Disabled; Enabling L0S\n");
4308                 }
4309         }
4310
4311         /* Configure analog phase-lock-loop before activating to D0A */
4312         if (il->cfg->pll_cfg_val)
4313                 il_set_bit(il, CSR_ANA_PLL_CFG,
4314                            il->cfg->pll_cfg_val);
4315
4316         /*
4317          * Set "initialization complete" bit to move adapter from
4318          * D0U* --> D0A* (powered-up active) state.
4319          */
4320         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4321
4322         /*
4323          * Wait for clock stabilization; once stabilized, access to
4324          * device-internal resources is supported, e.g. il_wr_prph()
4325          * and accesses to uCode SRAM.
4326          */
4327         ret =
4328             _il_poll_bit(il, CSR_GP_CNTRL,
4329                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4330                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4331         if (ret < 0) {
4332                 D_INFO("Failed to init the card\n");
4333                 goto out;
4334         }
4335
4336         /*
4337          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4338          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4339          *
4340          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4341          * do not disable clocks.  This preserves any hardware bits already
4342          * set by default in "CLK_CTRL_REG" after reset.
4343          */
4344         if (il->cfg->use_bsm)
4345                 il_wr_prph(il, APMG_CLK_EN_REG,
4346                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4347         else
4348                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4349         udelay(20);
4350
4351         /* Disable L1-Active */
4352         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4353                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4354
4355 out:
4356         return ret;
4357 }
4358 EXPORT_SYMBOL(il_apm_init);
4359
4360 int
4361 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4362 {
4363         int ret;
4364         s8 prev_tx_power;
4365         bool defer;
4366
4367         lockdep_assert_held(&il->mutex);
4368
4369         if (il->tx_power_user_lmt == tx_power && !force)
4370                 return 0;
4371
4372         if (!il->ops->send_tx_power)
4373                 return -EOPNOTSUPP;
4374
4375         /* 0 dBm mean 1 milliwatt */
4376         if (tx_power < 0) {
4377                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4378                 return -EINVAL;
4379         }
4380
4381         if (tx_power > il->tx_power_device_lmt) {
4382                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4383                         tx_power, il->tx_power_device_lmt);
4384                 return -EINVAL;
4385         }
4386
4387         if (!il_is_ready_rf(il))
4388                 return -EIO;
4389
4390         /* scan complete and commit_rxon use tx_power_next value,
4391          * it always need to be updated for newest request */
4392         il->tx_power_next = tx_power;
4393
4394         /* do not set tx power when scanning or channel changing */
4395         defer = test_bit(S_SCANNING, &il->status) ||
4396             memcmp(&il->active, &il->staging, sizeof(il->staging));
4397         if (defer && !force) {
4398                 D_INFO("Deferring tx power set\n");
4399                 return 0;
4400         }
4401
4402         prev_tx_power = il->tx_power_user_lmt;
4403         il->tx_power_user_lmt = tx_power;
4404
4405         ret = il->ops->send_tx_power(il);
4406
4407         /* if fail to set tx_power, restore the orig. tx power */
4408         if (ret) {
4409                 il->tx_power_user_lmt = prev_tx_power;
4410                 il->tx_power_next = prev_tx_power;
4411         }
4412         return ret;
4413 }
4414 EXPORT_SYMBOL(il_set_tx_power);
4415
4416 void
4417 il_send_bt_config(struct il_priv *il)
4418 {
4419         struct il_bt_cmd bt_cmd = {
4420                 .lead_time = BT_LEAD_TIME_DEF,
4421                 .max_kill = BT_MAX_KILL_DEF,
4422                 .kill_ack_mask = 0,
4423                 .kill_cts_mask = 0,
4424         };
4425
4426         if (!bt_coex_active)
4427                 bt_cmd.flags = BT_COEX_DISABLE;
4428         else
4429                 bt_cmd.flags = BT_COEX_ENABLE;
4430
4431         D_INFO("BT coex %s\n",
4432                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4433
4434         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4435                 IL_ERR("failed to send BT Coex Config\n");
4436 }
4437 EXPORT_SYMBOL(il_send_bt_config);
4438
4439 int
4440 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4441 {
4442         struct il_stats_cmd stats_cmd = {
4443                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4444         };
4445
4446         if (flags & CMD_ASYNC)
4447                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4448                                              &stats_cmd, NULL);
4449         else
4450                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4451                                        &stats_cmd);
4452 }
4453 EXPORT_SYMBOL(il_send_stats_request);
4454
4455 void
4456 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4457 {
4458 #ifdef CONFIG_IWLEGACY_DEBUG
4459         struct il_rx_pkt *pkt = rxb_addr(rxb);
4460         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4461         D_RX("sleep mode: %d, src: %d\n",
4462              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4463 #endif
4464 }
4465 EXPORT_SYMBOL(il_hdl_pm_sleep);
4466
4467 void
4468 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4469 {
4470         struct il_rx_pkt *pkt = rxb_addr(rxb);
4471         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4472         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4473                 il_get_cmd_string(pkt->hdr.cmd));
4474         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4475 }
4476 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4477
4478 void
4479 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4480 {
4481         struct il_rx_pkt *pkt = rxb_addr(rxb);
4482
4483         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4484                "seq 0x%04X ser 0x%08X\n",
4485                le32_to_cpu(pkt->u.err_resp.error_type),
4486                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4487                pkt->u.err_resp.cmd_id,
4488                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4489                le32_to_cpu(pkt->u.err_resp.error_info));
4490 }
4491 EXPORT_SYMBOL(il_hdl_error);
4492
4493 void
4494 il_clear_isr_stats(struct il_priv *il)
4495 {
4496         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4497 }
4498
4499 int
4500 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4501                const struct ieee80211_tx_queue_params *params)
4502 {
4503         struct il_priv *il = hw->priv;
4504         unsigned long flags;
4505         int q;
4506
4507         D_MAC80211("enter\n");
4508
4509         if (!il_is_ready_rf(il)) {
4510                 D_MAC80211("leave - RF not ready\n");
4511                 return -EIO;
4512         }
4513
4514         if (queue >= AC_NUM) {
4515                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4516                 return 0;
4517         }
4518
4519         q = AC_NUM - 1 - queue;
4520
4521         spin_lock_irqsave(&il->lock, flags);
4522
4523         il->qos_data.def_qos_parm.ac[q].cw_min =
4524             cpu_to_le16(params->cw_min);
4525         il->qos_data.def_qos_parm.ac[q].cw_max =
4526             cpu_to_le16(params->cw_max);
4527         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4528         il->qos_data.def_qos_parm.ac[q].edca_txop =
4529             cpu_to_le16((params->txop * 32));
4530
4531         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4532
4533         spin_unlock_irqrestore(&il->lock, flags);
4534
4535         D_MAC80211("leave\n");
4536         return 0;
4537 }
4538 EXPORT_SYMBOL(il_mac_conf_tx);
4539
4540 int
4541 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4542 {
4543         struct il_priv *il = hw->priv;
4544         int ret;
4545
4546         D_MAC80211("enter\n");
4547
4548         ret = (il->ibss_manager == IL_IBSS_MANAGER);
4549
4550         D_MAC80211("leave ret %d\n", ret);
4551         return ret;
4552 }
4553 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4554
4555 static int
4556 il_set_mode(struct il_priv *il)
4557 {
4558         il_connection_init_rx_config(il);
4559
4560         if (il->ops->set_rxon_chain)
4561                 il->ops->set_rxon_chain(il);
4562
4563         return il_commit_rxon(il);
4564 }
4565
4566 int
4567 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4568 {
4569         struct il_priv *il = hw->priv;
4570         int err;
4571         bool reset;
4572
4573         mutex_lock(&il->mutex);
4574         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4575
4576         if (!il_is_ready_rf(il)) {
4577                 IL_WARN("Try to add interface when device not ready\n");
4578                 err = -EINVAL;
4579                 goto out;
4580         }
4581
4582         /*
4583          * We do not support multiple virtual interfaces, but on hardware reset
4584          * we have to add the same interface again.
4585          */
4586         reset = (il->vif == vif);
4587         if (il->vif && !reset) {
4588                 err = -EOPNOTSUPP;
4589                 goto out;
4590         }
4591
4592         il->vif = vif;
4593         il->iw_mode = vif->type;
4594
4595         err = il_set_mode(il);
4596         if (err) {
4597                 IL_WARN("Fail to set mode %d\n", vif->type);
4598                 if (!reset) {
4599                         il->vif = NULL;
4600                         il->iw_mode = NL80211_IFTYPE_STATION;
4601                 }
4602         }
4603
4604 out:
4605         D_MAC80211("leave err %d\n", err);
4606         mutex_unlock(&il->mutex);
4607
4608         return err;
4609 }
4610 EXPORT_SYMBOL(il_mac_add_interface);
4611
4612 static void
4613 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4614 {
4615         lockdep_assert_held(&il->mutex);
4616
4617         if (il->scan_vif == vif) {
4618                 il_scan_cancel_timeout(il, 200);
4619                 il_force_scan_end(il);
4620         }
4621
4622         il_set_mode(il);
4623 }
4624
4625 void
4626 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4627 {
4628         struct il_priv *il = hw->priv;
4629
4630         mutex_lock(&il->mutex);
4631         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4632
4633         WARN_ON(il->vif != vif);
4634         il->vif = NULL;
4635         il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4636         il_teardown_interface(il, vif);
4637         eth_zero_addr(il->bssid);
4638
4639         D_MAC80211("leave\n");
4640         mutex_unlock(&il->mutex);
4641 }
4642 EXPORT_SYMBOL(il_mac_remove_interface);
4643
4644 int
4645 il_alloc_txq_mem(struct il_priv *il)
4646 {
4647         if (!il->txq)
4648                 il->txq =
4649                     kzalloc(sizeof(struct il_tx_queue) *
4650                             il->cfg->num_of_queues, GFP_KERNEL);
4651         if (!il->txq) {
4652                 IL_ERR("Not enough memory for txq\n");
4653                 return -ENOMEM;
4654         }
4655         return 0;
4656 }
4657 EXPORT_SYMBOL(il_alloc_txq_mem);
4658
4659 void
4660 il_free_txq_mem(struct il_priv *il)
4661 {
4662         kfree(il->txq);
4663         il->txq = NULL;
4664 }
4665 EXPORT_SYMBOL(il_free_txq_mem);
4666
4667 int
4668 il_force_reset(struct il_priv *il, bool external)
4669 {
4670         struct il_force_reset *force_reset;
4671
4672         if (test_bit(S_EXIT_PENDING, &il->status))
4673                 return -EINVAL;
4674
4675         force_reset = &il->force_reset;
4676         force_reset->reset_request_count++;
4677         if (!external) {
4678                 if (force_reset->last_force_reset_jiffies &&
4679                     time_after(force_reset->last_force_reset_jiffies +
4680                                force_reset->reset_duration, jiffies)) {
4681                         D_INFO("force reset rejected\n");
4682                         force_reset->reset_reject_count++;
4683                         return -EAGAIN;
4684                 }
4685         }
4686         force_reset->reset_success_count++;
4687         force_reset->last_force_reset_jiffies = jiffies;
4688
4689         /*
4690          * if the request is from external(ex: debugfs),
4691          * then always perform the request in regardless the module
4692          * parameter setting
4693          * if the request is from internal (uCode error or driver
4694          * detect failure), then fw_restart module parameter
4695          * need to be check before performing firmware reload
4696          */
4697
4698         if (!external && !il->cfg->mod_params->restart_fw) {
4699                 D_INFO("Cancel firmware reload based on "
4700                        "module parameter setting\n");
4701                 return 0;
4702         }
4703
4704         IL_ERR("On demand firmware reload\n");
4705
4706         /* Set the FW error flag -- cleared on il_down */
4707         set_bit(S_FW_ERROR, &il->status);
4708         wake_up(&il->wait_command_queue);
4709         /*
4710          * Keep the restart process from trying to send host
4711          * commands by clearing the INIT status bit
4712          */
4713         clear_bit(S_READY, &il->status);
4714         queue_work(il->workqueue, &il->restart);
4715
4716         return 0;
4717 }
4718 EXPORT_SYMBOL(il_force_reset);
4719
4720 int
4721 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4722                         enum nl80211_iftype newtype, bool newp2p)
4723 {
4724         struct il_priv *il = hw->priv;
4725         int err;
4726
4727         mutex_lock(&il->mutex);
4728         D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4729                     vif->type, vif->addr, newtype, newp2p);
4730
4731         if (newp2p) {
4732                 err = -EOPNOTSUPP;
4733                 goto out;
4734         }
4735
4736         if (!il->vif || !il_is_ready_rf(il)) {
4737                 /*
4738                  * Huh? But wait ... this can maybe happen when
4739                  * we're in the middle of a firmware restart!
4740                  */
4741                 err = -EBUSY;
4742                 goto out;
4743         }
4744
4745         /* success */
4746         vif->type = newtype;
4747         vif->p2p = false;
4748         il->iw_mode = newtype;
4749         il_teardown_interface(il, vif);
4750         err = 0;
4751
4752 out:
4753         D_MAC80211("leave err %d\n", err);
4754         mutex_unlock(&il->mutex);
4755
4756         return err;
4757 }
4758 EXPORT_SYMBOL(il_mac_change_interface);
4759
4760 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4761                   u32 queues, bool drop)
4762 {
4763         struct il_priv *il = hw->priv;
4764         unsigned long timeout = jiffies + msecs_to_jiffies(500);
4765         int i;
4766
4767         mutex_lock(&il->mutex);
4768         D_MAC80211("enter\n");
4769
4770         if (il->txq == NULL)
4771                 goto out;
4772
4773         for (i = 0; i < il->hw_params.max_txq_num; i++) {
4774                 struct il_queue *q;
4775
4776                 if (i == il->cmd_queue)
4777                         continue;
4778
4779                 q = &il->txq[i].q;
4780                 if (q->read_ptr == q->write_ptr)
4781                         continue;
4782
4783                 if (time_after(jiffies, timeout)) {
4784                         IL_ERR("Failed to flush queue %d\n", q->id);
4785                         break;
4786                 }
4787
4788                 msleep(20);
4789         }
4790 out:
4791         D_MAC80211("leave\n");
4792         mutex_unlock(&il->mutex);
4793 }
4794 EXPORT_SYMBOL(il_mac_flush);
4795
4796 /*
4797  * On every watchdog tick we check (latest) time stamp. If it does not
4798  * change during timeout period and queue is not empty we reset firmware.
4799  */
4800 static int
4801 il_check_stuck_queue(struct il_priv *il, int cnt)
4802 {
4803         struct il_tx_queue *txq = &il->txq[cnt];
4804         struct il_queue *q = &txq->q;
4805         unsigned long timeout;
4806         unsigned long now = jiffies;
4807         int ret;
4808
4809         if (q->read_ptr == q->write_ptr) {
4810                 txq->time_stamp = now;
4811                 return 0;
4812         }
4813
4814         timeout =
4815             txq->time_stamp +
4816             msecs_to_jiffies(il->cfg->wd_timeout);
4817
4818         if (time_after(now, timeout)) {
4819                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4820                        jiffies_to_msecs(now - txq->time_stamp));
4821                 ret = il_force_reset(il, false);
4822                 return (ret == -EAGAIN) ? 0 : 1;
4823         }
4824
4825         return 0;
4826 }
4827
4828 /*
4829  * Making watchdog tick be a quarter of timeout assure we will
4830  * discover the queue hung between timeout and 1.25*timeout
4831  */
4832 #define IL_WD_TICK(timeout) ((timeout) / 4)
4833
4834 /*
4835  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4836  * we reset the firmware. If everything is fine just rearm the timer.
4837  */
4838 void
4839 il_bg_watchdog(unsigned long data)
4840 {
4841         struct il_priv *il = (struct il_priv *)data;
4842         int cnt;
4843         unsigned long timeout;
4844
4845         if (test_bit(S_EXIT_PENDING, &il->status))
4846                 return;
4847
4848         timeout = il->cfg->wd_timeout;
4849         if (timeout == 0)
4850                 return;
4851
4852         /* monitor and check for stuck cmd queue */
4853         if (il_check_stuck_queue(il, il->cmd_queue))
4854                 return;
4855
4856         /* monitor and check for other stuck queues */
4857         for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4858                 /* skip as we already checked the command queue */
4859                 if (cnt == il->cmd_queue)
4860                         continue;
4861                 if (il_check_stuck_queue(il, cnt))
4862                         return;
4863         }
4864
4865         mod_timer(&il->watchdog,
4866                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4867 }
4868 EXPORT_SYMBOL(il_bg_watchdog);
4869
4870 void
4871 il_setup_watchdog(struct il_priv *il)
4872 {
4873         unsigned int timeout = il->cfg->wd_timeout;
4874
4875         if (timeout)
4876                 mod_timer(&il->watchdog,
4877                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4878         else
4879                 del_timer(&il->watchdog);
4880 }
4881 EXPORT_SYMBOL(il_setup_watchdog);
4882
4883 /*
4884  * extended beacon time format
4885  * time in usec will be changed into a 32-bit value in extended:internal format
4886  * the extended part is the beacon counts
4887  * the internal part is the time in usec within one beacon interval
4888  */
4889 u32
4890 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4891 {
4892         u32 quot;
4893         u32 rem;
4894         u32 interval = beacon_interval * TIME_UNIT;
4895
4896         if (!interval || !usec)
4897                 return 0;
4898
4899         quot =
4900             (usec /
4901              interval) & (il_beacon_time_mask_high(il,
4902                                                    il->hw_params.
4903                                                    beacon_time_tsf_bits) >> il->
4904                           hw_params.beacon_time_tsf_bits);
4905         rem =
4906             (usec % interval) & il_beacon_time_mask_low(il,
4907                                                         il->hw_params.
4908                                                         beacon_time_tsf_bits);
4909
4910         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4911 }
4912 EXPORT_SYMBOL(il_usecs_to_beacons);
4913
4914 /* base is usually what we get from ucode with each received frame,
4915  * the same as HW timer counter counting down
4916  */
4917 __le32
4918 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4919                    u32 beacon_interval)
4920 {
4921         u32 base_low = base & il_beacon_time_mask_low(il,
4922                                                       il->hw_params.
4923                                                       beacon_time_tsf_bits);
4924         u32 addon_low = addon & il_beacon_time_mask_low(il,
4925                                                         il->hw_params.
4926                                                         beacon_time_tsf_bits);
4927         u32 interval = beacon_interval * TIME_UNIT;
4928         u32 res = (base & il_beacon_time_mask_high(il,
4929                                                    il->hw_params.
4930                                                    beacon_time_tsf_bits)) +
4931             (addon & il_beacon_time_mask_high(il,
4932                                               il->hw_params.
4933                                               beacon_time_tsf_bits));
4934
4935         if (base_low > addon_low)
4936                 res += base_low - addon_low;
4937         else if (base_low < addon_low) {
4938                 res += interval + base_low - addon_low;
4939                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4940         } else
4941                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4942
4943         return cpu_to_le32(res);
4944 }
4945 EXPORT_SYMBOL(il_add_beacon_time);
4946
4947 #ifdef CONFIG_PM_SLEEP
4948
4949 static int
4950 il_pci_suspend(struct device *device)
4951 {
4952         struct pci_dev *pdev = to_pci_dev(device);
4953         struct il_priv *il = pci_get_drvdata(pdev);
4954
4955         /*
4956          * This function is called when system goes into suspend state
4957          * mac80211 will call il_mac_stop() from the mac80211 suspend function
4958          * first but since il_mac_stop() has no knowledge of who the caller is,
4959          * it will not call apm_ops.stop() to stop the DMA operation.
4960          * Calling apm_ops.stop here to make sure we stop the DMA.
4961          */
4962         il_apm_stop(il);
4963
4964         return 0;
4965 }
4966
4967 static int
4968 il_pci_resume(struct device *device)
4969 {
4970         struct pci_dev *pdev = to_pci_dev(device);
4971         struct il_priv *il = pci_get_drvdata(pdev);
4972         bool hw_rfkill = false;
4973
4974         /*
4975          * We disable the RETRY_TIMEOUT register (0x41) to keep
4976          * PCI Tx retries from interfering with C3 CPU state.
4977          */
4978         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4979
4980         il_enable_interrupts(il);
4981
4982         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4983                 hw_rfkill = true;
4984
4985         if (hw_rfkill)
4986                 set_bit(S_RFKILL, &il->status);
4987         else
4988                 clear_bit(S_RFKILL, &il->status);
4989
4990         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4991
4992         return 0;
4993 }
4994
4995 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4996 EXPORT_SYMBOL(il_pm_ops);
4997
4998 #endif /* CONFIG_PM_SLEEP */
4999
5000 static void
5001 il_update_qos(struct il_priv *il)
5002 {
5003         if (test_bit(S_EXIT_PENDING, &il->status))
5004                 return;
5005
5006         il->qos_data.def_qos_parm.qos_flags = 0;
5007
5008         if (il->qos_data.qos_active)
5009                 il->qos_data.def_qos_parm.qos_flags |=
5010                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5011
5012         if (il->ht.enabled)
5013                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5014
5015         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5016               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5017
5018         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5019                               &il->qos_data.def_qos_parm, NULL);
5020 }
5021
5022 /**
5023  * il_mac_config - mac80211 config callback
5024  */
5025 int
5026 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5027 {
5028         struct il_priv *il = hw->priv;
5029         const struct il_channel_info *ch_info;
5030         struct ieee80211_conf *conf = &hw->conf;
5031         struct ieee80211_channel *channel = conf->chandef.chan;
5032         struct il_ht_config *ht_conf = &il->current_ht_config;
5033         unsigned long flags = 0;
5034         int ret = 0;
5035         u16 ch;
5036         int scan_active = 0;
5037         bool ht_changed = false;
5038
5039         mutex_lock(&il->mutex);
5040         D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5041                    changed);
5042
5043         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5044                 scan_active = 1;
5045                 D_MAC80211("scan active\n");
5046         }
5047
5048         if (changed &
5049             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5050                 /* mac80211 uses static for non-HT which is what we want */
5051                 il->current_ht_config.smps = conf->smps_mode;
5052
5053                 /*
5054                  * Recalculate chain counts.
5055                  *
5056                  * If monitor mode is enabled then mac80211 will
5057                  * set up the SM PS mode to OFF if an HT channel is
5058                  * configured.
5059                  */
5060                 if (il->ops->set_rxon_chain)
5061                         il->ops->set_rxon_chain(il);
5062         }
5063
5064         /* during scanning mac80211 will delay channel setting until
5065          * scan finish with changed = 0
5066          */
5067         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5068
5069                 if (scan_active)
5070                         goto set_ch_out;
5071
5072                 ch = channel->hw_value;
5073                 ch_info = il_get_channel_info(il, channel->band, ch);
5074                 if (!il_is_channel_valid(ch_info)) {
5075                         D_MAC80211("leave - invalid channel\n");
5076                         ret = -EINVAL;
5077                         goto set_ch_out;
5078                 }
5079
5080                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5081                     !il_is_channel_ibss(ch_info)) {
5082                         D_MAC80211("leave - not IBSS channel\n");
5083                         ret = -EINVAL;
5084                         goto set_ch_out;
5085                 }
5086
5087                 spin_lock_irqsave(&il->lock, flags);
5088
5089                 /* Configure HT40 channels */
5090                 if (il->ht.enabled != conf_is_ht(conf)) {
5091                         il->ht.enabled = conf_is_ht(conf);
5092                         ht_changed = true;
5093                 }
5094                 if (il->ht.enabled) {
5095                         if (conf_is_ht40_minus(conf)) {
5096                                 il->ht.extension_chan_offset =
5097                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5098                                 il->ht.is_40mhz = true;
5099                         } else if (conf_is_ht40_plus(conf)) {
5100                                 il->ht.extension_chan_offset =
5101                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5102                                 il->ht.is_40mhz = true;
5103                         } else {
5104                                 il->ht.extension_chan_offset =
5105                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5106                                 il->ht.is_40mhz = false;
5107                         }
5108                 } else
5109                         il->ht.is_40mhz = false;
5110
5111                 /*
5112                  * Default to no protection. Protection mode will
5113                  * later be set from BSS config in il_ht_conf
5114                  */
5115                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5116
5117                 /* if we are switching from ht to 2.4 clear flags
5118                  * from any ht related info since 2.4 does not
5119                  * support ht */
5120                 if ((le16_to_cpu(il->staging.channel) != ch))
5121                         il->staging.flags = 0;
5122
5123                 il_set_rxon_channel(il, channel);
5124                 il_set_rxon_ht(il, ht_conf);
5125
5126                 il_set_flags_for_band(il, channel->band, il->vif);
5127
5128                 spin_unlock_irqrestore(&il->lock, flags);
5129
5130                 if (il->ops->update_bcast_stations)
5131                         ret = il->ops->update_bcast_stations(il);
5132
5133 set_ch_out:
5134                 /* The list of supported rates and rate mask can be different
5135                  * for each band; since the band may have changed, reset
5136                  * the rate mask to what mac80211 lists */
5137                 il_set_rate(il);
5138         }
5139
5140         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5141                 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5142                 ret = il_power_update_mode(il, false);
5143                 if (ret)
5144                         D_MAC80211("Error setting sleep level\n");
5145         }
5146
5147         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5148                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5149                            conf->power_level);
5150
5151                 il_set_tx_power(il, conf->power_level, false);
5152         }
5153
5154         if (!il_is_ready(il)) {
5155                 D_MAC80211("leave - not ready\n");
5156                 goto out;
5157         }
5158
5159         if (scan_active)
5160                 goto out;
5161
5162         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5163                 il_commit_rxon(il);
5164         else
5165                 D_INFO("Not re-sending same RXON configuration.\n");
5166         if (ht_changed)
5167                 il_update_qos(il);
5168
5169 out:
5170         D_MAC80211("leave ret %d\n", ret);
5171         mutex_unlock(&il->mutex);
5172
5173         return ret;
5174 }
5175 EXPORT_SYMBOL(il_mac_config);
5176
5177 void
5178 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5179 {
5180         struct il_priv *il = hw->priv;
5181         unsigned long flags;
5182
5183         mutex_lock(&il->mutex);
5184         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5185
5186         spin_lock_irqsave(&il->lock, flags);
5187
5188         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5189
5190         /* new association get rid of ibss beacon skb */
5191         if (il->beacon_skb)
5192                 dev_kfree_skb(il->beacon_skb);
5193         il->beacon_skb = NULL;
5194         il->timestamp = 0;
5195
5196         spin_unlock_irqrestore(&il->lock, flags);
5197
5198         il_scan_cancel_timeout(il, 100);
5199         if (!il_is_ready_rf(il)) {
5200                 D_MAC80211("leave - not ready\n");
5201                 mutex_unlock(&il->mutex);
5202                 return;
5203         }
5204
5205         /* we are restarting association process */
5206         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5207         il_commit_rxon(il);
5208
5209         il_set_rate(il);
5210
5211         D_MAC80211("leave\n");
5212         mutex_unlock(&il->mutex);
5213 }
5214 EXPORT_SYMBOL(il_mac_reset_tsf);
5215
5216 static void
5217 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5218 {
5219         struct il_ht_config *ht_conf = &il->current_ht_config;
5220         struct ieee80211_sta *sta;
5221         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5222
5223         D_ASSOC("enter:\n");
5224
5225         if (!il->ht.enabled)
5226                 return;
5227
5228         il->ht.protection =
5229             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5230         il->ht.non_gf_sta_present =
5231             !!(bss_conf->
5232                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5233
5234         ht_conf->single_chain_sufficient = false;
5235
5236         switch (vif->type) {
5237         case NL80211_IFTYPE_STATION:
5238                 rcu_read_lock();
5239                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5240                 if (sta) {
5241                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5242                         int maxstreams;
5243
5244                         maxstreams =
5245                             (ht_cap->mcs.
5246                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5247                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5248                         maxstreams += 1;
5249
5250                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5251                             ht_cap->mcs.rx_mask[2] == 0)
5252                                 ht_conf->single_chain_sufficient = true;
5253                         if (maxstreams <= 1)
5254                                 ht_conf->single_chain_sufficient = true;
5255                 } else {
5256                         /*
5257                          * If at all, this can only happen through a race
5258                          * when the AP disconnects us while we're still
5259                          * setting up the connection, in that case mac80211
5260                          * will soon tell us about that.
5261                          */
5262                         ht_conf->single_chain_sufficient = true;
5263                 }
5264                 rcu_read_unlock();
5265                 break;
5266         case NL80211_IFTYPE_ADHOC:
5267                 ht_conf->single_chain_sufficient = true;
5268                 break;
5269         default:
5270                 break;
5271         }
5272
5273         D_ASSOC("leave\n");
5274 }
5275
5276 static inline void
5277 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5278 {
5279         /*
5280          * inform the ucode that there is no longer an
5281          * association and that no more packets should be
5282          * sent
5283          */
5284         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5285         il->staging.assoc_id = 0;
5286         il_commit_rxon(il);
5287 }
5288
5289 static void
5290 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5291 {
5292         struct il_priv *il = hw->priv;
5293         unsigned long flags;
5294         __le64 timestamp;
5295         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5296
5297         if (!skb)
5298                 return;
5299
5300         D_MAC80211("enter\n");
5301
5302         lockdep_assert_held(&il->mutex);
5303
5304         if (!il->beacon_enabled) {
5305                 IL_ERR("update beacon with no beaconing enabled\n");
5306                 dev_kfree_skb(skb);
5307                 return;
5308         }
5309
5310         spin_lock_irqsave(&il->lock, flags);
5311
5312         if (il->beacon_skb)
5313                 dev_kfree_skb(il->beacon_skb);
5314
5315         il->beacon_skb = skb;
5316
5317         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5318         il->timestamp = le64_to_cpu(timestamp);
5319
5320         D_MAC80211("leave\n");
5321         spin_unlock_irqrestore(&il->lock, flags);
5322
5323         if (!il_is_ready_rf(il)) {
5324                 D_MAC80211("leave - RF not ready\n");
5325                 return;
5326         }
5327
5328         il->ops->post_associate(il);
5329 }
5330
5331 void
5332 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5333                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5334 {
5335         struct il_priv *il = hw->priv;
5336         int ret;
5337
5338         mutex_lock(&il->mutex);
5339         D_MAC80211("enter: changes 0x%x\n", changes);
5340
5341         if (!il_is_alive(il)) {
5342                 D_MAC80211("leave - not alive\n");
5343                 mutex_unlock(&il->mutex);
5344                 return;
5345         }
5346
5347         if (changes & BSS_CHANGED_QOS) {
5348                 unsigned long flags;
5349
5350                 spin_lock_irqsave(&il->lock, flags);
5351                 il->qos_data.qos_active = bss_conf->qos;
5352                 il_update_qos(il);
5353                 spin_unlock_irqrestore(&il->lock, flags);
5354         }
5355
5356         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5357                 /* FIXME: can we remove beacon_enabled ? */
5358                 if (vif->bss_conf.enable_beacon)
5359                         il->beacon_enabled = true;
5360                 else
5361                         il->beacon_enabled = false;
5362         }
5363
5364         if (changes & BSS_CHANGED_BSSID) {
5365                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5366
5367                 /*
5368                  * On passive channel we wait with blocked queues to see if
5369                  * there is traffic on that channel. If no frame will be
5370                  * received (what is very unlikely since scan detects AP on
5371                  * that channel, but theoretically possible), mac80211 associate
5372                  * procedure will time out and mac80211 will call us with NULL
5373                  * bssid. We have to unblock queues on such condition.
5374                  */
5375                 if (is_zero_ether_addr(bss_conf->bssid))
5376                         il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5377
5378                 /*
5379                  * If there is currently a HW scan going on in the background,
5380                  * then we need to cancel it, otherwise sometimes we are not
5381                  * able to authenticate (FIXME: why ?)
5382                  */
5383                 if (il_scan_cancel_timeout(il, 100)) {
5384                         D_MAC80211("leave - scan abort failed\n");
5385                         mutex_unlock(&il->mutex);
5386                         return;
5387                 }
5388
5389                 /* mac80211 only sets assoc when in STATION mode */
5390                 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5391
5392                 /* FIXME: currently needed in a few places */
5393                 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5394         }
5395
5396         /*
5397          * This needs to be after setting the BSSID in case
5398          * mac80211 decides to do both changes at once because
5399          * it will invoke post_associate.
5400          */
5401         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5402                 il_beacon_update(hw, vif);
5403
5404         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5405                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5406                 if (bss_conf->use_short_preamble)
5407                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5408                 else
5409                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5410         }
5411
5412         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5413                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5414                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5415                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5416                 else
5417                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5418                 if (bss_conf->use_cts_prot)
5419                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5420                 else
5421                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5422         }
5423
5424         if (changes & BSS_CHANGED_BASIC_RATES) {
5425                 /* XXX use this information
5426                  *
5427                  * To do that, remove code from il_set_rate() and put something
5428                  * like this here:
5429                  *
5430                  if (A-band)
5431                  il->staging.ofdm_basic_rates =
5432                  bss_conf->basic_rates;
5433                  else
5434                  il->staging.ofdm_basic_rates =
5435                  bss_conf->basic_rates >> 4;
5436                  il->staging.cck_basic_rates =
5437                  bss_conf->basic_rates & 0xF;
5438                  */
5439         }
5440
5441         if (changes & BSS_CHANGED_HT) {
5442                 il_ht_conf(il, vif);
5443
5444                 if (il->ops->set_rxon_chain)
5445                         il->ops->set_rxon_chain(il);
5446         }
5447
5448         if (changes & BSS_CHANGED_ASSOC) {
5449                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5450                 if (bss_conf->assoc) {
5451                         il->timestamp = bss_conf->sync_tsf;
5452
5453                         if (!il_is_rfkill(il))
5454                                 il->ops->post_associate(il);
5455                 } else
5456                         il_set_no_assoc(il, vif);
5457         }
5458
5459         if (changes && il_is_associated(il) && bss_conf->aid) {
5460                 D_MAC80211("Changes (%#x) while associated\n", changes);
5461                 ret = il_send_rxon_assoc(il);
5462                 if (!ret) {
5463                         /* Sync active_rxon with latest change. */
5464                         memcpy((void *)&il->active, &il->staging,
5465                                sizeof(struct il_rxon_cmd));
5466                 }
5467         }
5468
5469         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5470                 if (vif->bss_conf.enable_beacon) {
5471                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5472                                ETH_ALEN);
5473                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5474                         il->ops->config_ap(il);
5475                 } else
5476                         il_set_no_assoc(il, vif);
5477         }
5478
5479         if (changes & BSS_CHANGED_IBSS) {
5480                 ret = il->ops->manage_ibss_station(il, vif,
5481                                                    bss_conf->ibss_joined);
5482                 if (ret)
5483                         IL_ERR("failed to %s IBSS station %pM\n",
5484                                bss_conf->ibss_joined ? "add" : "remove",
5485                                bss_conf->bssid);
5486         }
5487
5488         D_MAC80211("leave\n");
5489         mutex_unlock(&il->mutex);
5490 }
5491 EXPORT_SYMBOL(il_mac_bss_info_changed);
5492
5493 irqreturn_t
5494 il_isr(int irq, void *data)
5495 {
5496         struct il_priv *il = data;
5497         u32 inta, inta_mask;
5498         u32 inta_fh;
5499         unsigned long flags;
5500         if (!il)
5501                 return IRQ_NONE;
5502
5503         spin_lock_irqsave(&il->lock, flags);
5504
5505         /* Disable (but don't clear!) interrupts here to avoid
5506          *    back-to-back ISRs and sporadic interrupts from our NIC.
5507          * If we have something to service, the tasklet will re-enable ints.
5508          * If we *don't* have something, we'll re-enable before leaving here. */
5509         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5510         _il_wr(il, CSR_INT_MASK, 0x00000000);
5511
5512         /* Discover which interrupts are active/pending */
5513         inta = _il_rd(il, CSR_INT);
5514         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5515
5516         /* Ignore interrupt if there's nothing in NIC to service.
5517          * This may be due to IRQ shared with another device,
5518          * or due to sporadic interrupts thrown from our NIC. */
5519         if (!inta && !inta_fh) {
5520                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5521                 goto none;
5522         }
5523
5524         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5525                 /* Hardware disappeared. It might have already raised
5526                  * an interrupt */
5527                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5528                 goto unplugged;
5529         }
5530
5531         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5532               inta_fh);
5533
5534         inta &= ~CSR_INT_BIT_SCD;
5535
5536         /* il_irq_tasklet() will service interrupts and re-enable them */
5537         if (likely(inta || inta_fh))
5538                 tasklet_schedule(&il->irq_tasklet);
5539
5540 unplugged:
5541         spin_unlock_irqrestore(&il->lock, flags);
5542         return IRQ_HANDLED;
5543
5544 none:
5545         /* re-enable interrupts here since we don't have anything to service. */
5546         /* only Re-enable if disabled by irq */
5547         if (test_bit(S_INT_ENABLED, &il->status))
5548                 il_enable_interrupts(il);
5549         spin_unlock_irqrestore(&il->lock, flags);
5550         return IRQ_NONE;
5551 }
5552 EXPORT_SYMBOL(il_isr);
5553
5554 /*
5555  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5556  *  function.
5557  */
5558 void
5559 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5560                      __le16 fc, __le32 *tx_flags)
5561 {
5562         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5563                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5564                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5565                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5566
5567                 if (!ieee80211_is_mgmt(fc))
5568                         return;
5569
5570                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5571                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5572                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5573                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5574                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5575                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5576                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5577                         break;
5578                 }
5579         } else if (info->control.rates[0].
5580                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5581                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5582                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5583                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5584         }
5585 }
5586 EXPORT_SYMBOL(il_tx_cmd_protection);