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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/types.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/pci.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/delay.h>
  39 #include <linux/skbuff.h>
  40 #include <net/mac80211.h>
  41
  42 #include "common.h"
  43
  44 int
  45 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
  46 {
  47         const int interval = 10; /* microseconds */
  48         int t = 0;
  49
  50         do {
  51                 if ((_il_rd(il, addr) & mask) == (bits & mask))
  52                         return t;
  53                 udelay(interval);
  54                 t += interval;
  55         } while (t < timeout);
  56
  57         return -ETIMEDOUT;
  58 }
  59 EXPORT_SYMBOL(_il_poll_bit);
  60
  61 void
  62 il_set_bit(struct il_priv *p, u32 r, u32 m)
  63 {
  64         unsigned long reg_flags;
  65
  66         spin_lock_irqsave(&p->reg_lock, reg_flags);
  67         _il_set_bit(p, r, m);
  68         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  69 }
  70 EXPORT_SYMBOL(il_set_bit);
  71
  72 void
  73 il_clear_bit(struct il_priv *p, u32 r, u32 m)
  74 {
  75         unsigned long reg_flags;
  76
  77         spin_lock_irqsave(&p->reg_lock, reg_flags);
  78         _il_clear_bit(p, r, m);
  79         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  80 }
  81 EXPORT_SYMBOL(il_clear_bit);
  82
  83 bool
  84 _il_grab_nic_access(struct il_priv *il)
  85 {
  86         int ret;
  87         u32 val;
  88
  89         /* this bit wakes up the NIC */
  90         _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
  91
  92         /*
  93          * These bits say the device is running, and should keep running for
  94          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
  95          * but they do not indicate that embedded SRAM is restored yet;
  96          * 3945 and 4965 have volatile SRAM, and must save/restore contents
  97          * to/from host DRAM when sleeping/waking for power-saving.
  98          * Each direction takes approximately 1/4 millisecond; with this
  99          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
 100          * series of register accesses are expected (e.g. reading Event Log),
 101          * to keep device from sleeping.
 102          *
 103          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
 104          * SRAM is okay/restored.  We don't check that here because this call
 105          * is just for hardware register access; but GP1 MAC_SLEEP check is a
 106          * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
 107          *
 108          */
 109         ret =
 110             _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 111                          (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 112                           CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
 113         if (unlikely(ret < 0)) {
 114                 val = _il_rd(il, CSR_GP_CNTRL);
 115                 WARN_ONCE(1, "Timeout waiting for ucode processor access "
 116                              "(CSR_GP_CNTRL 0x%08x)\n", val);
 117                 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 118                 return false;
 119         }
 120
 121         return true;
 122 }
 123 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
 124
 125 int
 126 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
 127 {
 128         const int interval = 10; /* microseconds */
 129         int t = 0;
 130
 131         do {
 132                 if ((il_rd(il, addr) & mask) == mask)
 133                         return t;
 134                 udelay(interval);
 135                 t += interval;
 136         } while (t < timeout);
 137
 138         return -ETIMEDOUT;
 139 }
 140 EXPORT_SYMBOL(il_poll_bit);
 141
 142 u32
 143 il_rd_prph(struct il_priv *il, u32 reg)
 144 {
 145         unsigned long reg_flags;
 146         u32 val;
 147
 148         spin_lock_irqsave(&il->reg_lock, reg_flags);
 149         _il_grab_nic_access(il);
 150         val = _il_rd_prph(il, reg);
 151         _il_release_nic_access(il);
 152         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 153         return val;
 154 }
 155 EXPORT_SYMBOL(il_rd_prph);
 156
 157 void
 158 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
 159 {
 160         unsigned long reg_flags;
 161
 162         spin_lock_irqsave(&il->reg_lock, reg_flags);
 163         if (likely(_il_grab_nic_access(il))) {
 164                 _il_wr_prph(il, addr, val);
 165                 _il_release_nic_access(il);
 166         }
 167         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 168 }
 169 EXPORT_SYMBOL(il_wr_prph);
 170
 171 u32
 172 il_read_targ_mem(struct il_priv *il, u32 addr)
 173 {
 174         unsigned long reg_flags;
 175         u32 value;
 176
 177         spin_lock_irqsave(&il->reg_lock, reg_flags);
 178         _il_grab_nic_access(il);
 179
 180         _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
 181         value = _il_rd(il, HBUS_TARG_MEM_RDAT);
 182
 183         _il_release_nic_access(il);
 184         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 185         return value;
 186 }
 187 EXPORT_SYMBOL(il_read_targ_mem);
 188
 189 void
 190 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
 191 {
 192         unsigned long reg_flags;
 193
 194         spin_lock_irqsave(&il->reg_lock, reg_flags);
 195         if (likely(_il_grab_nic_access(il))) {
 196                 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
 197                 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
 198                 _il_release_nic_access(il);
 199         }
 200         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 201 }
 202 EXPORT_SYMBOL(il_write_targ_mem);
 203
 204 const char *
 205 il_get_cmd_string(u8 cmd)
 206 {
 207         switch (cmd) {
 208                 IL_CMD(N_ALIVE);
 209                 IL_CMD(N_ERROR);
 210                 IL_CMD(C_RXON);
 211                 IL_CMD(C_RXON_ASSOC);
 212                 IL_CMD(C_QOS_PARAM);
 213                 IL_CMD(C_RXON_TIMING);
 214                 IL_CMD(C_ADD_STA);
 215                 IL_CMD(C_REM_STA);
 216                 IL_CMD(C_WEPKEY);
 217                 IL_CMD(N_3945_RX);
 218                 IL_CMD(C_TX);
 219                 IL_CMD(C_RATE_SCALE);
 220                 IL_CMD(C_LEDS);
 221                 IL_CMD(C_TX_LINK_QUALITY_CMD);
 222                 IL_CMD(C_CHANNEL_SWITCH);
 223                 IL_CMD(N_CHANNEL_SWITCH);
 224                 IL_CMD(C_SPECTRUM_MEASUREMENT);
 225                 IL_CMD(N_SPECTRUM_MEASUREMENT);
 226                 IL_CMD(C_POWER_TBL);
 227                 IL_CMD(N_PM_SLEEP);
 228                 IL_CMD(N_PM_DEBUG_STATS);
 229                 IL_CMD(C_SCAN);
 230                 IL_CMD(C_SCAN_ABORT);
 231                 IL_CMD(N_SCAN_START);
 232                 IL_CMD(N_SCAN_RESULTS);
 233                 IL_CMD(N_SCAN_COMPLETE);
 234                 IL_CMD(N_BEACON);
 235                 IL_CMD(C_TX_BEACON);
 236                 IL_CMD(C_TX_PWR_TBL);
 237                 IL_CMD(C_BT_CONFIG);
 238                 IL_CMD(C_STATS);
 239                 IL_CMD(N_STATS);
 240                 IL_CMD(N_CARD_STATE);
 241                 IL_CMD(N_MISSED_BEACONS);
 242                 IL_CMD(C_CT_KILL_CONFIG);
 243                 IL_CMD(C_SENSITIVITY);
 244                 IL_CMD(C_PHY_CALIBRATION);
 245                 IL_CMD(N_RX_PHY);
 246                 IL_CMD(N_RX_MPDU);
 247                 IL_CMD(N_RX);
 248                 IL_CMD(N_COMPRESSED_BA);
 249         default:
 250                 return "UNKNOWN";
 251
 252         }
 253 }
 254 EXPORT_SYMBOL(il_get_cmd_string);
 255
 256 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 257
 258 static void
 259 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
 260                         struct il_rx_pkt *pkt)
 261 {
 262         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 263                 IL_ERR("Bad return from %s (0x%08X)\n",
 264                        il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 265                 return;
 266         }
 267 #ifdef CONFIG_IWLEGACY_DEBUG
 268         switch (cmd->hdr.cmd) {
 269         case C_TX_LINK_QUALITY_CMD:
 270         case C_SENSITIVITY:
 271                 D_HC_DUMP("back from %s (0x%08X)\n",
 272                           il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 273                 break;
 274         default:
 275                 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
 276                      pkt->hdr.flags);
 277         }
 278 #endif
 279 }
 280
 281 static int
 282 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 283 {
 284         int ret;
 285
 286         BUG_ON(!(cmd->flags & CMD_ASYNC));
 287
 288         /* An asynchronous command can not expect an SKB to be set. */
 289         BUG_ON(cmd->flags & CMD_WANT_SKB);
 290
 291         /* Assign a generic callback if one is not provided */
 292         if (!cmd->callback)
 293                 cmd->callback = il_generic_cmd_callback;
 294
 295         if (test_bit(S_EXIT_PENDING, &il->status))
 296                 return -EBUSY;
 297
 298         ret = il_enqueue_hcmd(il, cmd);
 299         if (ret < 0) {
 300                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 301                        il_get_cmd_string(cmd->id), ret);
 302                 return ret;
 303         }
 304         return 0;
 305 }
 306
 307 int
 308 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 309 {
 310         int cmd_idx;
 311         int ret;
 312
 313         lockdep_assert_held(&il->mutex);
 314
 315         BUG_ON(cmd->flags & CMD_ASYNC);
 316
 317         /* A synchronous command can not have a callback set. */
 318         BUG_ON(cmd->callback);
 319
 320         D_INFO("Attempting to send sync command %s\n",
 321                il_get_cmd_string(cmd->id));
 322
 323         set_bit(S_HCMD_ACTIVE, &il->status);
 324         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 325                il_get_cmd_string(cmd->id));
 326
 327         cmd_idx = il_enqueue_hcmd(il, cmd);
 328         if (cmd_idx < 0) {
 329                 ret = cmd_idx;
 330                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 331                        il_get_cmd_string(cmd->id), ret);
 332                 goto out;
 333         }
 334
 335         ret = wait_event_timeout(il->wait_command_queue,
 336                                  !test_bit(S_HCMD_ACTIVE, &il->status),
 337                                  HOST_COMPLETE_TIMEOUT);
 338         if (!ret) {
 339                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 340                         IL_ERR("Error sending %s: time out after %dms.\n",
 341                                il_get_cmd_string(cmd->id),
 342                                jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 343
 344                         clear_bit(S_HCMD_ACTIVE, &il->status);
 345                         D_INFO("Clearing HCMD_ACTIVE for command %s\n",
 346                                il_get_cmd_string(cmd->id));
 347                         ret = -ETIMEDOUT;
 348                         goto cancel;
 349                 }
 350         }
 351
 352         if (test_bit(S_RFKILL, &il->status)) {
 353                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 354                        il_get_cmd_string(cmd->id));
 355                 ret = -ECANCELED;
 356                 goto fail;
 357         }
 358         if (test_bit(S_FW_ERROR, &il->status)) {
 359                 IL_ERR("Command %s failed: FW Error\n",
 360                        il_get_cmd_string(cmd->id));
 361                 ret = -EIO;
 362                 goto fail;
 363         }
 364         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 365                 IL_ERR("Error: Response NULL in '%s'\n",
 366                        il_get_cmd_string(cmd->id));
 367                 ret = -EIO;
 368                 goto cancel;
 369         }
 370
 371         ret = 0;
 372         goto out;
 373
 374 cancel:
 375         if (cmd->flags & CMD_WANT_SKB) {
 376                 /*
 377                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 378                  * TX cmd queue. Otherwise in case the cmd comes
 379                  * in later, it will possibly set an invalid
 380                  * address (cmd->meta.source).
 381                  */
 382                 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
 383         }
 384 fail:
 385         if (cmd->reply_page) {
 386                 il_free_pages(il, cmd->reply_page);
 387                 cmd->reply_page = 0;
 388         }
 389 out:
 390         return ret;
 391 }
 392 EXPORT_SYMBOL(il_send_cmd_sync);
 393
 394 int
 395 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 396 {
 397         if (cmd->flags & CMD_ASYNC)
 398                 return il_send_cmd_async(il, cmd);
 399
 400         return il_send_cmd_sync(il, cmd);
 401 }
 402 EXPORT_SYMBOL(il_send_cmd);
 403
 404 int
 405 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 406 {
 407         struct il_host_cmd cmd = {
 408                 .id = id,
 409                 .len = len,
 410                 .data = data,
 411         };
 412
 413         return il_send_cmd_sync(il, &cmd);
 414 }
 415 EXPORT_SYMBOL(il_send_cmd_pdu);
 416
 417 int
 418 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
 419                       void (*callback) (struct il_priv *il,
 420                                         struct il_device_cmd *cmd,
 421                                         struct il_rx_pkt *pkt))
 422 {
 423         struct il_host_cmd cmd = {
 424                 .id = id,
 425                 .len = len,
 426                 .data = data,
 427         };
 428
 429         cmd.flags |= CMD_ASYNC;
 430         cmd.callback = callback;
 431
 432         return il_send_cmd_async(il, &cmd);
 433 }
 434 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 435
 436 /* default: IL_LED_BLINK(0) using blinking idx table */
 437 static int led_mode;
 438 module_param(led_mode, int, S_IRUGO);
 439 MODULE_PARM_DESC(led_mode,
 440                  "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
 441
 442 /* Throughput           OFF time(ms)    ON time (ms)
 443  *      >300                    25              25
 444  *      >200 to 300             40              40
 445  *      >100 to 200             55              55
 446  *      >70 to 100              65              65
 447  *      >50 to 70               75              75
 448  *      >20 to 50               85              85
 449  *      >10 to 20               95              95
 450  *      >5 to 10                110             110
 451  *      >1 to 5                 130             130
 452  *      >0 to 1                 167             167
 453  *      <=0                                     SOLID ON
 454  */
 455 static const struct ieee80211_tpt_blink il_blink[] = {
 456         {.throughput = 0,               .blink_time = 334},
 457         {.throughput = 1 * 1024 - 1,    .blink_time = 260},
 458         {.throughput = 5 * 1024 - 1,    .blink_time = 220},
 459         {.throughput = 10 * 1024 - 1,   .blink_time = 190},
 460         {.throughput = 20 * 1024 - 1,   .blink_time = 170},
 461         {.throughput = 50 * 1024 - 1,   .blink_time = 150},
 462         {.throughput = 70 * 1024 - 1,   .blink_time = 130},
 463         {.throughput = 100 * 1024 - 1,  .blink_time = 110},
 464         {.throughput = 200 * 1024 - 1,  .blink_time = 80},
 465         {.throughput = 300 * 1024 - 1,  .blink_time = 50},
 466 };
 467
 468 /*
 469  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 470  * Led blink rate analysis showed an average deviation of 0% on 3945,
 471  * 5% on 4965 HW.
 472  * Need to compensate on the led on/off time per HW according to the deviation
 473  * to achieve the desired led frequency
 474  * The calculation is: (100-averageDeviation)/100 * blinkTime
 475  * For code efficiency the calculation will be:
 476  *     compensation = (100 - averageDeviation) * 64 / 100
 477  *     NewBlinkTime = (compensation * BlinkTime) / 64
 478  */
 479 static inline u8
 480 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
 481 {
 482         if (!compensation) {
 483                 IL_ERR("undefined blink compensation: "
 484                        "use pre-defined blinking time\n");
 485                 return time;
 486         }
 487
 488         return (u8) ((time * compensation) >> 6);
 489 }
 490
 491 /* Set led pattern command */
 492 static int
 493 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
 494 {
 495         struct il_led_cmd led_cmd = {
 496                 .id = IL_LED_LINK,
 497                 .interval = IL_DEF_LED_INTRVL
 498         };
 499         int ret;
 500
 501         if (!test_bit(S_READY, &il->status))
 502                 return -EBUSY;
 503
 504         if (il->blink_on == on && il->blink_off == off)
 505                 return 0;
 506
 507         if (off == 0) {
 508                 /* led is SOLID_ON */
 509                 on = IL_LED_SOLID;
 510         }
 511
 512         D_LED("Led blink time compensation=%u\n",
 513               il->cfg->led_compensation);
 514         led_cmd.on =
 515             il_blink_compensation(il, on,
 516                                   il->cfg->led_compensation);
 517         led_cmd.off =
 518             il_blink_compensation(il, off,
 519                                   il->cfg->led_compensation);
 520
 521         ret = il->ops->send_led_cmd(il, &led_cmd);
 522         if (!ret) {
 523                 il->blink_on = on;
 524                 il->blink_off = off;
 525         }
 526         return ret;
 527 }
 528
 529 static void
 530 il_led_brightness_set(struct led_classdev *led_cdev,
 531                       enum led_brightness brightness)
 532 {
 533         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 534         unsigned long on = 0;
 535
 536         if (brightness > 0)
 537                 on = IL_LED_SOLID;
 538
 539         il_led_cmd(il, on, 0);
 540 }
 541
 542 static int
 543 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 544                  unsigned long *delay_off)
 545 {
 546         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 547
 548         return il_led_cmd(il, *delay_on, *delay_off);
 549 }
 550
 551 void
 552 il_leds_init(struct il_priv *il)
 553 {
 554         int mode = led_mode;
 555         int ret;
 556
 557         if (mode == IL_LED_DEFAULT)
 558                 mode = il->cfg->led_mode;
 559
 560         il->led.name =
 561             kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
 562         il->led.brightness_set = il_led_brightness_set;
 563         il->led.blink_set = il_led_blink_set;
 564         il->led.max_brightness = 1;
 565
 566         switch (mode) {
 567         case IL_LED_DEFAULT:
 568                 WARN_ON(1);
 569                 break;
 570         case IL_LED_BLINK:
 571                 il->led.default_trigger =
 572                     ieee80211_create_tpt_led_trigger(il->hw,
 573                                                      IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 574                                                      il_blink,
 575                                                      ARRAY_SIZE(il_blink));
 576                 break;
 577         case IL_LED_RF_STATE:
 578                 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
 579                 break;
 580         }
 581
 582         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 583         if (ret) {
 584                 kfree(il->led.name);
 585                 return;
 586         }
 587
 588         il->led_registered = true;
 589 }
 590 EXPORT_SYMBOL(il_leds_init);
 591
 592 void
 593 il_leds_exit(struct il_priv *il)
 594 {
 595         if (!il->led_registered)
 596                 return;
 597
 598         led_classdev_unregister(&il->led);
 599         kfree(il->led.name);
 600 }
 601 EXPORT_SYMBOL(il_leds_exit);
 602
 603 /************************** EEPROM BANDS ****************************
 604  *
 605  * The il_eeprom_band definitions below provide the mapping from the
 606  * EEPROM contents to the specific channel number supported for each
 607  * band.
 608  *
 609  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 610  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 611  * The specific geography and calibration information for that channel
 612  * is contained in the eeprom map itself.
 613  *
 614  * During init, we copy the eeprom information and channel map
 615  * information into il->channel_info_24/52 and il->channel_map_24/52
 616  *
 617  * channel_map_24/52 provides the idx in the channel_info array for a
 618  * given channel.  We have to have two separate maps as there is channel
 619  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 620  * band_2
 621  *
 622  * A value of 0xff stored in the channel_map indicates that the channel
 623  * is not supported by the hardware at all.
 624  *
 625  * A value of 0xfe in the channel_map indicates that the channel is not
 626  * valid for Tx with the current hardware.  This means that
 627  * while the system can tune and receive on a given channel, it may not
 628  * be able to associate or transmit any frames on that
 629  * channel.  There is no corresponding channel information for that
 630  * entry.
 631  *
 632  *********************************************************************/
 633
 634 /* 2.4 GHz */
 635 const u8 il_eeprom_band_1[14] = {
 636         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 637 };
 638
 639 /* 5.2 GHz bands */
 640 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 641         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 642 };
 643
 644 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 645         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 646 };
 647
 648 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 649         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 650 };
 651
 652 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 653         145, 149, 153, 157, 161, 165
 654 };
 655
 656 static const u8 il_eeprom_band_6[] = {  /* 2.4 ht40 channel */
 657         1, 2, 3, 4, 5, 6, 7
 658 };
 659
 660 static const u8 il_eeprom_band_7[] = {  /* 5.2 ht40 channel */
 661         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 662 };
 663
 664 /******************************************************************************
 665  *
 666  * EEPROM related functions
 667  *
 668 ******************************************************************************/
 669
 670 static int
 671 il_eeprom_verify_signature(struct il_priv *il)
 672 {
 673         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 674         int ret = 0;
 675
 676         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 677         switch (gp) {
 678         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 679         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 680                 break;
 681         default:
 682                 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
 683                 ret = -ENOENT;
 684                 break;
 685         }
 686         return ret;
 687 }
 688
 689 const u8 *
 690 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 691 {
 692         BUG_ON(offset >= il->cfg->eeprom_size);
 693         return &il->eeprom[offset];
 694 }
 695 EXPORT_SYMBOL(il_eeprom_query_addr);
 696
 697 u16
 698 il_eeprom_query16(const struct il_priv *il, size_t offset)
 699 {
 700         if (!il->eeprom)
 701                 return 0;
 702         return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
 703 }
 704 EXPORT_SYMBOL(il_eeprom_query16);
 705
 706 /**
 707  * il_eeprom_init - read EEPROM contents
 708  *
 709  * Load the EEPROM contents from adapter into il->eeprom
 710  *
 711  * NOTE:  This routine uses the non-debug IO access functions.
 712  */
 713 int
 714 il_eeprom_init(struct il_priv *il)
 715 {
 716         __le16 *e;
 717         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 718         int sz;
 719         int ret;
 720         u16 addr;
 721
 722         /* allocate eeprom */
 723         sz = il->cfg->eeprom_size;
 724         D_EEPROM("NVM size = %d\n", sz);
 725         il->eeprom = kzalloc(sz, GFP_KERNEL);
 726         if (!il->eeprom)
 727                 return -ENOMEM;
 728
 729         e = (__le16 *) il->eeprom;
 730
 731         il->ops->apm_init(il);
 732
 733         ret = il_eeprom_verify_signature(il);
 734         if (ret < 0) {
 735                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 736                 ret = -ENOENT;
 737                 goto err;
 738         }
 739
 740         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 741         ret = il->ops->eeprom_acquire_semaphore(il);
 742         if (ret < 0) {
 743                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 744                 ret = -ENOENT;
 745                 goto err;
 746         }
 747
 748         /* eeprom is an array of 16bit values */
 749         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 750                 u32 r;
 751
 752                 _il_wr(il, CSR_EEPROM_REG,
 753                        CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 754
 755                 ret =
 756                     _il_poll_bit(il, CSR_EEPROM_REG,
 757                                  CSR_EEPROM_REG_READ_VALID_MSK,
 758                                  CSR_EEPROM_REG_READ_VALID_MSK,
 759                                  IL_EEPROM_ACCESS_TIMEOUT);
 760                 if (ret < 0) {
 761                         IL_ERR("Time out reading EEPROM[%d]\n", addr);
 762                         goto done;
 763                 }
 764                 r = _il_rd(il, CSR_EEPROM_REG);
 765                 e[addr / 2] = cpu_to_le16(r >> 16);
 766         }
 767
 768         D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 769                  il_eeprom_query16(il, EEPROM_VERSION));
 770
 771         ret = 0;
 772 done:
 773         il->ops->eeprom_release_semaphore(il);
 774
 775 err:
 776         if (ret)
 777                 il_eeprom_free(il);
 778         /* Reset chip to save power until we load uCode during "up". */
 779         il_apm_stop(il);
 780         return ret;
 781 }
 782 EXPORT_SYMBOL(il_eeprom_init);
 783
 784 void
 785 il_eeprom_free(struct il_priv *il)
 786 {
 787         kfree(il->eeprom);
 788         il->eeprom = NULL;
 789 }
 790 EXPORT_SYMBOL(il_eeprom_free);
 791
 792 static void
 793 il_init_band_reference(const struct il_priv *il, int eep_band,
 794                        int *eeprom_ch_count,
 795                        const struct il_eeprom_channel **eeprom_ch_info,
 796                        const u8 **eeprom_ch_idx)
 797 {
 798         u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 799
 800         switch (eep_band) {
 801         case 1:         /* 2.4GHz band */
 802                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 803                 *eeprom_ch_info =
 804                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 805                                                                      offset);
 806                 *eeprom_ch_idx = il_eeprom_band_1;
 807                 break;
 808         case 2:         /* 4.9GHz band */
 809                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 810                 *eeprom_ch_info =
 811                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 812                                                                      offset);
 813                 *eeprom_ch_idx = il_eeprom_band_2;
 814                 break;
 815         case 3:         /* 5.2GHz band */
 816                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 817                 *eeprom_ch_info =
 818                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 819                                                                      offset);
 820                 *eeprom_ch_idx = il_eeprom_band_3;
 821                 break;
 822         case 4:         /* 5.5GHz band */
 823                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 824                 *eeprom_ch_info =
 825                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 826                                                                      offset);
 827                 *eeprom_ch_idx = il_eeprom_band_4;
 828                 break;
 829         case 5:         /* 5.7GHz band */
 830                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 831                 *eeprom_ch_info =
 832                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 833                                                                      offset);
 834                 *eeprom_ch_idx = il_eeprom_band_5;
 835                 break;
 836         case 6:         /* 2.4GHz ht40 channels */
 837                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 838                 *eeprom_ch_info =
 839                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 840                                                                      offset);
 841                 *eeprom_ch_idx = il_eeprom_band_6;
 842                 break;
 843         case 7:         /* 5 GHz ht40 channels */
 844                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 845                 *eeprom_ch_info =
 846                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 847                                                                      offset);
 848                 *eeprom_ch_idx = il_eeprom_band_7;
 849                 break;
 850         default:
 851                 BUG();
 852         }
 853 }
 854
 855 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 856                             ? # x " " : "")
 857 /**
 858  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 859  *
 860  * Does not set up a command, or touch hardware.
 861  */
 862 static int
 863 il_mod_ht40_chan_info(struct il_priv *il, enum ieee80211_band band, u16 channel,
 864                       const struct il_eeprom_channel *eeprom_ch,
 865                       u8 clear_ht40_extension_channel)
 866 {
 867         struct il_channel_info *ch_info;
 868
 869         ch_info =
 870             (struct il_channel_info *)il_get_channel_info(il, band, channel);
 871
 872         if (!il_is_channel_valid(ch_info))
 873                 return -1;
 874
 875         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 876                  " Ad-Hoc %ssupported\n", ch_info->channel,
 877                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 878                  CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 879                  CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 880                  CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 881                  eeprom_ch->max_power_avg,
 882                  ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 883                   !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 884
 885         ch_info->ht40_eeprom = *eeprom_ch;
 886         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 887         ch_info->ht40_flags = eeprom_ch->flags;
 888         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 889                 ch_info->ht40_extension_channel &=
 890                     ~clear_ht40_extension_channel;
 891
 892         return 0;
 893 }
 894
 895 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 896                             ? # x " " : "")
 897
 898 /**
 899  * il_init_channel_map - Set up driver's info for all possible channels
 900  */
 901 int
 902 il_init_channel_map(struct il_priv *il)
 903 {
 904         int eeprom_ch_count = 0;
 905         const u8 *eeprom_ch_idx = NULL;
 906         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 907         int band, ch;
 908         struct il_channel_info *ch_info;
 909
 910         if (il->channel_count) {
 911                 D_EEPROM("Channel map already initialized.\n");
 912                 return 0;
 913         }
 914
 915         D_EEPROM("Initializing regulatory info from EEPROM\n");
 916
 917         il->channel_count =
 918             ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 919             ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 920             ARRAY_SIZE(il_eeprom_band_5);
 921
 922         D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 923
 924         il->channel_info =
 925             kzalloc(sizeof(struct il_channel_info) * il->channel_count,
 926                     GFP_KERNEL);
 927         if (!il->channel_info) {
 928                 IL_ERR("Could not allocate channel_info\n");
 929                 il->channel_count = 0;
 930                 return -ENOMEM;
 931         }
 932
 933         ch_info = il->channel_info;
 934
 935         /* Loop through the 5 EEPROM bands adding them in order to the
 936          * channel map we maintain (that contains additional information than
 937          * what just in the EEPROM) */
 938         for (band = 1; band <= 5; band++) {
 939
 940                 il_init_band_reference(il, band, &eeprom_ch_count,
 941                                        &eeprom_ch_info, &eeprom_ch_idx);
 942
 943                 /* Loop through each band adding each of the channels */
 944                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 945                         ch_info->channel = eeprom_ch_idx[ch];
 946                         ch_info->band =
 947                             (band ==
 948                              1) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 949
 950                         /* permanently store EEPROM's channel regulatory flags
 951                          *   and max power in channel info database. */
 952                         ch_info->eeprom = eeprom_ch_info[ch];
 953
 954                         /* Copy the run-time flags so they are there even on
 955                          * invalid channels */
 956                         ch_info->flags = eeprom_ch_info[ch].flags;
 957                         /* First write that ht40 is not enabled, and then enable
 958                          * one by one */
 959                         ch_info->ht40_extension_channel =
 960                             IEEE80211_CHAN_NO_HT40;
 961
 962                         if (!(il_is_channel_valid(ch_info))) {
 963                                 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 964                                          "No traffic\n", ch_info->channel,
 965                                          ch_info->flags,
 966                                          il_is_channel_a_band(ch_info) ? "5.2" :
 967                                          "2.4");
 968                                 ch_info++;
 969                                 continue;
 970                         }
 971
 972                         /* Initialize regulatory-based run-time data */
 973                         ch_info->max_power_avg = ch_info->curr_txpow =
 974                             eeprom_ch_info[ch].max_power_avg;
 975                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 976                         ch_info->min_power = 0;
 977
 978                         D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 979                                  " Ad-Hoc %ssupported\n", ch_info->channel,
 980                                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 981                                  CHECK_AND_PRINT_I(VALID),
 982                                  CHECK_AND_PRINT_I(IBSS),
 983                                  CHECK_AND_PRINT_I(ACTIVE),
 984                                  CHECK_AND_PRINT_I(RADAR),
 985                                  CHECK_AND_PRINT_I(WIDE),
 986                                  CHECK_AND_PRINT_I(DFS),
 987                                  eeprom_ch_info[ch].flags,
 988                                  eeprom_ch_info[ch].max_power_avg,
 989                                  ((eeprom_ch_info[ch].
 990                                    flags & EEPROM_CHANNEL_IBSS) &&
 991                                   !(eeprom_ch_info[ch].
 992                                     flags & EEPROM_CHANNEL_RADAR)) ? "" :
 993                                  "not ");
 994
 995                         ch_info++;
 996                 }
 997         }
 998
 999         /* Check if we do have HT40 channels */
1000         if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1001             il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1002                 return 0;
1003
1004         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1005         for (band = 6; band <= 7; band++) {
1006                 enum ieee80211_band ieeeband;
1007
1008                 il_init_band_reference(il, band, &eeprom_ch_count,
1009                                        &eeprom_ch_info, &eeprom_ch_idx);
1010
1011                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1012                 ieeeband =
1013                     (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1014
1015                 /* Loop through each band adding each of the channels */
1016                 for (ch = 0; ch < eeprom_ch_count; ch++) {
1017                         /* Set up driver's info for lower half */
1018                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1019                                               &eeprom_ch_info[ch],
1020                                               IEEE80211_CHAN_NO_HT40PLUS);
1021
1022                         /* Set up driver's info for upper half */
1023                         il_mod_ht40_chan_info(il, ieeeband,
1024                                               eeprom_ch_idx[ch] + 4,
1025                                               &eeprom_ch_info[ch],
1026                                               IEEE80211_CHAN_NO_HT40MINUS);
1027                 }
1028         }
1029
1030         return 0;
1031 }
1032 EXPORT_SYMBOL(il_init_channel_map);
1033
1034 /*
1035  * il_free_channel_map - undo allocations in il_init_channel_map
1036  */
1037 void
1038 il_free_channel_map(struct il_priv *il)
1039 {
1040         kfree(il->channel_info);
1041         il->channel_count = 0;
1042 }
1043 EXPORT_SYMBOL(il_free_channel_map);
1044
1045 /**
1046  * il_get_channel_info - Find driver's ilate channel info
1047  *
1048  * Based on band and channel number.
1049  */
1050 const struct il_channel_info *
1051 il_get_channel_info(const struct il_priv *il, enum ieee80211_band band,
1052                     u16 channel)
1053 {
1054         int i;
1055
1056         switch (band) {
1057         case IEEE80211_BAND_5GHZ:
1058                 for (i = 14; i < il->channel_count; i++) {
1059                         if (il->channel_info[i].channel == channel)
1060                                 return &il->channel_info[i];
1061                 }
1062                 break;
1063         case IEEE80211_BAND_2GHZ:
1064                 if (channel >= 1 && channel <= 14)
1065                         return &il->channel_info[channel - 1];
1066                 break;
1067         default:
1068                 BUG();
1069         }
1070
1071         return NULL;
1072 }
1073 EXPORT_SYMBOL(il_get_channel_info);
1074
1075 /*
1076  * Setting power level allows the card to go to sleep when not busy.
1077  *
1078  * We calculate a sleep command based on the required latency, which
1079  * we get from mac80211.
1080  */
1081
1082 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1083                 cpu_to_le32(X0), \
1084                 cpu_to_le32(X1), \
1085                 cpu_to_le32(X2), \
1086                 cpu_to_le32(X3), \
1087                 cpu_to_le32(X4)  \
1088 }
1089
1090 static void
1091 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1092 {
1093         const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1094                 SLP_VEC(2, 2, 4, 6, 0xFF),
1095                 SLP_VEC(2, 4, 7, 10, 10),
1096                 SLP_VEC(4, 7, 10, 10, 0xFF)
1097         };
1098         int i, dtim_period, no_dtim;
1099         u32 max_sleep;
1100         bool skip;
1101
1102         memset(cmd, 0, sizeof(*cmd));
1103
1104         if (il->power_data.pci_pm)
1105                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1106
1107         /* if no Power Save, we are done */
1108         if (il->power_data.ps_disabled)
1109                 return;
1110
1111         cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1112         cmd->keep_alive_seconds = 0;
1113         cmd->debug_flags = 0;
1114         cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1115         cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1116         cmd->keep_alive_beacons = 0;
1117
1118         dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1119
1120         if (dtim_period <= 2) {
1121                 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1122                 no_dtim = 2;
1123         } else if (dtim_period <= 10) {
1124                 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1125                 no_dtim = 2;
1126         } else {
1127                 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1128                 no_dtim = 0;
1129         }
1130
1131         if (dtim_period == 0) {
1132                 dtim_period = 1;
1133                 skip = false;
1134         } else {
1135                 skip = !!no_dtim;
1136         }
1137
1138         if (skip) {
1139                 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1140
1141                 max_sleep = le32_to_cpu(tmp);
1142                 if (max_sleep == 0xFF)
1143                         max_sleep = dtim_period * (skip + 1);
1144                 else if (max_sleep >  dtim_period)
1145                         max_sleep = (max_sleep / dtim_period) * dtim_period;
1146                 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1147         } else {
1148                 max_sleep = dtim_period;
1149                 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1150         }
1151
1152         for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1153                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1154                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1155 }
1156
1157 static int
1158 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1159 {
1160         D_POWER("Sending power/sleep command\n");
1161         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1162         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1163         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1164         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1165                 le32_to_cpu(cmd->sleep_interval[0]),
1166                 le32_to_cpu(cmd->sleep_interval[1]),
1167                 le32_to_cpu(cmd->sleep_interval[2]),
1168                 le32_to_cpu(cmd->sleep_interval[3]),
1169                 le32_to_cpu(cmd->sleep_interval[4]));
1170
1171         return il_send_cmd_pdu(il, C_POWER_TBL,
1172                                sizeof(struct il_powertable_cmd), cmd);
1173 }
1174
1175 static int
1176 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1177 {
1178         int ret;
1179         bool update_chains;
1180
1181         lockdep_assert_held(&il->mutex);
1182
1183         /* Don't update the RX chain when chain noise calibration is running */
1184         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1185             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1186
1187         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1188                 return 0;
1189
1190         if (!il_is_ready_rf(il))
1191                 return -EIO;
1192
1193         /* scan complete use sleep_power_next, need to be updated */
1194         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1195         if (test_bit(S_SCANNING, &il->status) && !force) {
1196                 D_INFO("Defer power set mode while scanning\n");
1197                 return 0;
1198         }
1199
1200         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1201                 set_bit(S_POWER_PMI, &il->status);
1202
1203         ret = il_set_power(il, cmd);
1204         if (!ret) {
1205                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1206                         clear_bit(S_POWER_PMI, &il->status);
1207
1208                 if (il->ops->update_chain_flags && update_chains)
1209                         il->ops->update_chain_flags(il);
1210                 else if (il->ops->update_chain_flags)
1211                         D_POWER("Cannot update the power, chain noise "
1212                                 "calibration running: %d\n",
1213                                 il->chain_noise_data.state);
1214
1215                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1216         } else
1217                 IL_ERR("set power fail, ret = %d", ret);
1218
1219         return ret;
1220 }
1221
1222 int
1223 il_power_update_mode(struct il_priv *il, bool force)
1224 {
1225         struct il_powertable_cmd cmd;
1226
1227         il_build_powertable_cmd(il, &cmd);
1228
1229         return il_power_set_mode(il, &cmd, force);
1230 }
1231 EXPORT_SYMBOL(il_power_update_mode);
1232
1233 /* initialize to default */
1234 void
1235 il_power_initialize(struct il_priv *il)
1236 {
1237         u16 lctl;
1238
1239         pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1240         il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1241
1242         il->power_data.debug_sleep_level_override = -1;
1243
1244         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1245 }
1246 EXPORT_SYMBOL(il_power_initialize);
1247
1248 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1249  * sending probe req.  This should be set long enough to hear probe responses
1250  * from more than one AP.  */
1251 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1252 #define IL_ACTIVE_DWELL_TIME_52    (20)
1253
1254 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1255 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1256
1257 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1258  * Must be set longer than active dwell time.
1259  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1260 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1261 #define IL_PASSIVE_DWELL_TIME_52   (10)
1262 #define IL_PASSIVE_DWELL_BASE      (100)
1263 #define IL_CHANNEL_TUNE_TIME       5
1264
1265 static int
1266 il_send_scan_abort(struct il_priv *il)
1267 {
1268         int ret;
1269         struct il_rx_pkt *pkt;
1270         struct il_host_cmd cmd = {
1271                 .id = C_SCAN_ABORT,
1272                 .flags = CMD_WANT_SKB,
1273         };
1274
1275         /* Exit instantly with error when device is not ready
1276          * to receive scan abort command or it does not perform
1277          * hardware scan currently */
1278         if (!test_bit(S_READY, &il->status) ||
1279             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1280             !test_bit(S_SCAN_HW, &il->status) ||
1281             test_bit(S_FW_ERROR, &il->status) ||
1282             test_bit(S_EXIT_PENDING, &il->status))
1283                 return -EIO;
1284
1285         ret = il_send_cmd_sync(il, &cmd);
1286         if (ret)
1287                 return ret;
1288
1289         pkt = (struct il_rx_pkt *)cmd.reply_page;
1290         if (pkt->u.status != CAN_ABORT_STATUS) {
1291                 /* The scan abort will return 1 for success or
1292                  * 2 for "failure".  A failure condition can be
1293                  * due to simply not being in an active scan which
1294                  * can occur if we send the scan abort before we
1295                  * the microcode has notified us that a scan is
1296                  * completed. */
1297                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1298                 ret = -EIO;
1299         }
1300
1301         il_free_pages(il, cmd.reply_page);
1302         return ret;
1303 }
1304
1305 static void
1306 il_complete_scan(struct il_priv *il, bool aborted)
1307 {
1308         /* check if scan was requested from mac80211 */
1309         if (il->scan_request) {
1310                 D_SCAN("Complete scan in mac80211\n");
1311                 ieee80211_scan_completed(il->hw, aborted);
1312         }
1313
1314         il->scan_vif = NULL;
1315         il->scan_request = NULL;
1316 }
1317
1318 void
1319 il_force_scan_end(struct il_priv *il)
1320 {
1321         lockdep_assert_held(&il->mutex);
1322
1323         if (!test_bit(S_SCANNING, &il->status)) {
1324                 D_SCAN("Forcing scan end while not scanning\n");
1325                 return;
1326         }
1327
1328         D_SCAN("Forcing scan end\n");
1329         clear_bit(S_SCANNING, &il->status);
1330         clear_bit(S_SCAN_HW, &il->status);
1331         clear_bit(S_SCAN_ABORTING, &il->status);
1332         il_complete_scan(il, true);
1333 }
1334
1335 static void
1336 il_do_scan_abort(struct il_priv *il)
1337 {
1338         int ret;
1339
1340         lockdep_assert_held(&il->mutex);
1341
1342         if (!test_bit(S_SCANNING, &il->status)) {
1343                 D_SCAN("Not performing scan to abort\n");
1344                 return;
1345         }
1346
1347         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1348                 D_SCAN("Scan abort in progress\n");
1349                 return;
1350         }
1351
1352         ret = il_send_scan_abort(il);
1353         if (ret) {
1354                 D_SCAN("Send scan abort failed %d\n", ret);
1355                 il_force_scan_end(il);
1356         } else
1357                 D_SCAN("Successfully send scan abort\n");
1358 }
1359
1360 /**
1361  * il_scan_cancel - Cancel any currently executing HW scan
1362  */
1363 int
1364 il_scan_cancel(struct il_priv *il)
1365 {
1366         D_SCAN("Queuing abort scan\n");
1367         queue_work(il->workqueue, &il->abort_scan);
1368         return 0;
1369 }
1370 EXPORT_SYMBOL(il_scan_cancel);
1371
1372 /**
1373  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1374  * @ms: amount of time to wait (in milliseconds) for scan to abort
1375  *
1376  */
1377 int
1378 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1379 {
1380         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1381
1382         lockdep_assert_held(&il->mutex);
1383
1384         D_SCAN("Scan cancel timeout\n");
1385
1386         il_do_scan_abort(il);
1387
1388         while (time_before_eq(jiffies, timeout)) {
1389                 if (!test_bit(S_SCAN_HW, &il->status))
1390                         break;
1391                 msleep(20);
1392         }
1393
1394         return test_bit(S_SCAN_HW, &il->status);
1395 }
1396 EXPORT_SYMBOL(il_scan_cancel_timeout);
1397
1398 /* Service response to C_SCAN (0x80) */
1399 static void
1400 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1401 {
1402 #ifdef CONFIG_IWLEGACY_DEBUG
1403         struct il_rx_pkt *pkt = rxb_addr(rxb);
1404         struct il_scanreq_notification *notif =
1405             (struct il_scanreq_notification *)pkt->u.raw;
1406
1407         D_SCAN("Scan request status = 0x%x\n", notif->status);
1408 #endif
1409 }
1410
1411 /* Service N_SCAN_START (0x82) */
1412 static void
1413 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1414 {
1415         struct il_rx_pkt *pkt = rxb_addr(rxb);
1416         struct il_scanstart_notification *notif =
1417             (struct il_scanstart_notification *)pkt->u.raw;
1418         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1419         D_SCAN("Scan start: " "%d [802.11%s] "
1420                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1421                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1422                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1423 }
1424
1425 /* Service N_SCAN_RESULTS (0x83) */
1426 static void
1427 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1428 {
1429 #ifdef CONFIG_IWLEGACY_DEBUG
1430         struct il_rx_pkt *pkt = rxb_addr(rxb);
1431         struct il_scanresults_notification *notif =
1432             (struct il_scanresults_notification *)pkt->u.raw;
1433
1434         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1435                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1436                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1437                le32_to_cpu(notif->stats[0]),
1438                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1439 #endif
1440 }
1441
1442 /* Service N_SCAN_COMPLETE (0x84) */
1443 static void
1444 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1445 {
1446
1447 #ifdef CONFIG_IWLEGACY_DEBUG
1448         struct il_rx_pkt *pkt = rxb_addr(rxb);
1449         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1450 #endif
1451
1452         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1453                scan_notif->scanned_channels, scan_notif->tsf_low,
1454                scan_notif->tsf_high, scan_notif->status);
1455
1456         /* The HW is no longer scanning */
1457         clear_bit(S_SCAN_HW, &il->status);
1458
1459         D_SCAN("Scan on %sGHz took %dms\n",
1460                (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1461                jiffies_to_msecs(jiffies - il->scan_start));
1462
1463         queue_work(il->workqueue, &il->scan_completed);
1464 }
1465
1466 void
1467 il_setup_rx_scan_handlers(struct il_priv *il)
1468 {
1469         /* scan handlers */
1470         il->handlers[C_SCAN] = il_hdl_scan;
1471         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1472         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1473         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1474 }
1475 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1476
1477 u16
1478 il_get_active_dwell_time(struct il_priv *il, enum ieee80211_band band,
1479                          u8 n_probes)
1480 {
1481         if (band == IEEE80211_BAND_5GHZ)
1482                 return IL_ACTIVE_DWELL_TIME_52 +
1483                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1484         else
1485                 return IL_ACTIVE_DWELL_TIME_24 +
1486                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1487 }
1488 EXPORT_SYMBOL(il_get_active_dwell_time);
1489
1490 u16
1491 il_get_passive_dwell_time(struct il_priv *il, enum ieee80211_band band,
1492                           struct ieee80211_vif *vif)
1493 {
1494         u16 value;
1495
1496         u16 passive =
1497             (band ==
1498              IEEE80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1499             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1500             IL_PASSIVE_DWELL_TIME_52;
1501
1502         if (il_is_any_associated(il)) {
1503                 /*
1504                  * If we're associated, we clamp the maximum passive
1505                  * dwell time to be 98% of the smallest beacon interval
1506                  * (minus 2 * channel tune time)
1507                  */
1508                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1509                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1510                         value = IL_PASSIVE_DWELL_BASE;
1511                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1512                 passive = min(value, passive);
1513         }
1514
1515         return passive;
1516 }
1517 EXPORT_SYMBOL(il_get_passive_dwell_time);
1518
1519 void
1520 il_init_scan_params(struct il_priv *il)
1521 {
1522         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1523         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1524                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1525         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1526                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1527 }
1528 EXPORT_SYMBOL(il_init_scan_params);
1529
1530 static int
1531 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1532 {
1533         int ret;
1534
1535         lockdep_assert_held(&il->mutex);
1536
1537         cancel_delayed_work(&il->scan_check);
1538
1539         if (!il_is_ready_rf(il)) {
1540                 IL_WARN("Request scan called when driver not ready.\n");
1541                 return -EIO;
1542         }
1543
1544         if (test_bit(S_SCAN_HW, &il->status)) {
1545                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1546                 return -EBUSY;
1547         }
1548
1549         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1550                 D_SCAN("Scan request while abort pending.\n");
1551                 return -EBUSY;
1552         }
1553
1554         D_SCAN("Starting scan...\n");
1555
1556         set_bit(S_SCANNING, &il->status);
1557         il->scan_start = jiffies;
1558
1559         ret = il->ops->request_scan(il, vif);
1560         if (ret) {
1561                 clear_bit(S_SCANNING, &il->status);
1562                 return ret;
1563         }
1564
1565         queue_delayed_work(il->workqueue, &il->scan_check,
1566                            IL_SCAN_CHECK_WATCHDOG);
1567
1568         return 0;
1569 }
1570
1571 int
1572 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1573                struct ieee80211_scan_request *hw_req)
1574 {
1575         struct cfg80211_scan_request *req = &hw_req->req;
1576         struct il_priv *il = hw->priv;
1577         int ret;
1578
1579         if (req->n_channels == 0) {
1580                 IL_ERR("Can not scan on no channels.\n");
1581                 return -EINVAL;
1582         }
1583
1584         mutex_lock(&il->mutex);
1585         D_MAC80211("enter\n");
1586
1587         if (test_bit(S_SCANNING, &il->status)) {
1588                 D_SCAN("Scan already in progress.\n");
1589                 ret = -EAGAIN;
1590                 goto out_unlock;
1591         }
1592
1593         /* mac80211 will only ask for one band at a time */
1594         il->scan_request = req;
1595         il->scan_vif = vif;
1596         il->scan_band = req->channels[0]->band;
1597
1598         ret = il_scan_initiate(il, vif);
1599
1600 out_unlock:
1601         D_MAC80211("leave ret %d\n", ret);
1602         mutex_unlock(&il->mutex);
1603
1604         return ret;
1605 }
1606 EXPORT_SYMBOL(il_mac_hw_scan);
1607
1608 static void
1609 il_bg_scan_check(struct work_struct *data)
1610 {
1611         struct il_priv *il =
1612             container_of(data, struct il_priv, scan_check.work);
1613
1614         D_SCAN("Scan check work\n");
1615
1616         /* Since we are here firmware does not finish scan and
1617          * most likely is in bad shape, so we don't bother to
1618          * send abort command, just force scan complete to mac80211 */
1619         mutex_lock(&il->mutex);
1620         il_force_scan_end(il);
1621         mutex_unlock(&il->mutex);
1622 }
1623
1624 /**
1625  * il_fill_probe_req - fill in all required fields and IE for probe request
1626  */
1627
1628 u16
1629 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1630                   const u8 *ta, const u8 *ies, int ie_len, int left)
1631 {
1632         int len = 0;
1633         u8 *pos = NULL;
1634
1635         /* Make sure there is enough space for the probe request,
1636          * two mandatory IEs and the data */
1637         left -= 24;
1638         if (left < 0)
1639                 return 0;
1640
1641         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1642         eth_broadcast_addr(frame->da);
1643         memcpy(frame->sa, ta, ETH_ALEN);
1644         eth_broadcast_addr(frame->bssid);
1645         frame->seq_ctrl = 0;
1646
1647         len += 24;
1648
1649         /* ...next IE... */
1650         pos = &frame->u.probe_req.variable[0];
1651
1652         /* fill in our indirect SSID IE */
1653         left -= 2;
1654         if (left < 0)
1655                 return 0;
1656         *pos++ = WLAN_EID_SSID;
1657         *pos++ = 0;
1658
1659         len += 2;
1660
1661         if (WARN_ON(left < ie_len))
1662                 return len;
1663
1664         if (ies && ie_len) {
1665                 memcpy(pos, ies, ie_len);
1666                 len += ie_len;
1667         }
1668
1669         return (u16) len;
1670 }
1671 EXPORT_SYMBOL(il_fill_probe_req);
1672
1673 static void
1674 il_bg_abort_scan(struct work_struct *work)
1675 {
1676         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1677
1678         D_SCAN("Abort scan work\n");
1679
1680         /* We keep scan_check work queued in case when firmware will not
1681          * report back scan completed notification */
1682         mutex_lock(&il->mutex);
1683         il_scan_cancel_timeout(il, 200);
1684         mutex_unlock(&il->mutex);
1685 }
1686
1687 static void
1688 il_bg_scan_completed(struct work_struct *work)
1689 {
1690         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1691         bool aborted;
1692
1693         D_SCAN("Completed scan.\n");
1694
1695         cancel_delayed_work(&il->scan_check);
1696
1697         mutex_lock(&il->mutex);
1698
1699         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1700         if (aborted)
1701                 D_SCAN("Aborted scan completed.\n");
1702
1703         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1704                 D_SCAN("Scan already completed.\n");
1705                 goto out_settings;
1706         }
1707
1708         il_complete_scan(il, aborted);
1709
1710 out_settings:
1711         /* Can we still talk to firmware ? */
1712         if (!il_is_ready_rf(il))
1713                 goto out;
1714
1715         /*
1716          * We do not commit power settings while scan is pending,
1717          * do it now if the settings changed.
1718          */
1719         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1720         il_set_tx_power(il, il->tx_power_next, false);
1721
1722         il->ops->post_scan(il);
1723
1724 out:
1725         mutex_unlock(&il->mutex);
1726 }
1727
1728 void
1729 il_setup_scan_deferred_work(struct il_priv *il)
1730 {
1731         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1732         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1733         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1734 }
1735 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1736
1737 void
1738 il_cancel_scan_deferred_work(struct il_priv *il)
1739 {
1740         cancel_work_sync(&il->abort_scan);
1741         cancel_work_sync(&il->scan_completed);
1742
1743         if (cancel_delayed_work_sync(&il->scan_check)) {
1744                 mutex_lock(&il->mutex);
1745                 il_force_scan_end(il);
1746                 mutex_unlock(&il->mutex);
1747         }
1748 }
1749 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1750
1751 /* il->sta_lock must be held */
1752 static void
1753 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1754 {
1755
1756         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1757                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1758                        sta_id, il->stations[sta_id].sta.sta.addr);
1759
1760         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1761                 D_ASSOC("STA id %u addr %pM already present"
1762                         " in uCode (according to driver)\n", sta_id,
1763                         il->stations[sta_id].sta.sta.addr);
1764         } else {
1765                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1766                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1767                         il->stations[sta_id].sta.sta.addr);
1768         }
1769 }
1770
1771 static int
1772 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1773                         struct il_rx_pkt *pkt, bool sync)
1774 {
1775         u8 sta_id = addsta->sta.sta_id;
1776         unsigned long flags;
1777         int ret = -EIO;
1778
1779         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1780                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1781                 return ret;
1782         }
1783
1784         D_INFO("Processing response for adding station %u\n", sta_id);
1785
1786         spin_lock_irqsave(&il->sta_lock, flags);
1787
1788         switch (pkt->u.add_sta.status) {
1789         case ADD_STA_SUCCESS_MSK:
1790                 D_INFO("C_ADD_STA PASSED\n");
1791                 il_sta_ucode_activate(il, sta_id);
1792                 ret = 0;
1793                 break;
1794         case ADD_STA_NO_ROOM_IN_TBL:
1795                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1796                 break;
1797         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1798                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1799                        sta_id);
1800                 break;
1801         case ADD_STA_MODIFY_NON_EXIST_STA:
1802                 IL_ERR("Attempting to modify non-existing station %d\n",
1803                        sta_id);
1804                 break;
1805         default:
1806                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1807                 break;
1808         }
1809
1810         D_INFO("%s station id %u addr %pM\n",
1811                il->stations[sta_id].sta.mode ==
1812                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1813                il->stations[sta_id].sta.sta.addr);
1814
1815         /*
1816          * XXX: The MAC address in the command buffer is often changed from
1817          * the original sent to the device. That is, the MAC address
1818          * written to the command buffer often is not the same MAC address
1819          * read from the command buffer when the command returns. This
1820          * issue has not yet been resolved and this debugging is left to
1821          * observe the problem.
1822          */
1823         D_INFO("%s station according to cmd buffer %pM\n",
1824                il->stations[sta_id].sta.mode ==
1825                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1826         spin_unlock_irqrestore(&il->sta_lock, flags);
1827
1828         return ret;
1829 }
1830
1831 static void
1832 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1833                     struct il_rx_pkt *pkt)
1834 {
1835         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1836
1837         il_process_add_sta_resp(il, addsta, pkt, false);
1838
1839 }
1840
1841 int
1842 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1843 {
1844         struct il_rx_pkt *pkt = NULL;
1845         int ret = 0;
1846         u8 data[sizeof(*sta)];
1847         struct il_host_cmd cmd = {
1848                 .id = C_ADD_STA,
1849                 .flags = flags,
1850                 .data = data,
1851         };
1852         u8 sta_id __maybe_unused = sta->sta.sta_id;
1853
1854         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1855                flags & CMD_ASYNC ? "a" : "");
1856
1857         if (flags & CMD_ASYNC)
1858                 cmd.callback = il_add_sta_callback;
1859         else {
1860                 cmd.flags |= CMD_WANT_SKB;
1861                 might_sleep();
1862         }
1863
1864         cmd.len = il->ops->build_addsta_hcmd(sta, data);
1865         ret = il_send_cmd(il, &cmd);
1866         if (ret)
1867                 return ret;
1868         if (flags & CMD_ASYNC)
1869                 return 0;
1870
1871         pkt = (struct il_rx_pkt *)cmd.reply_page;
1872         ret = il_process_add_sta_resp(il, sta, pkt, true);
1873
1874         il_free_pages(il, cmd.reply_page);
1875
1876         return ret;
1877 }
1878 EXPORT_SYMBOL(il_send_add_sta);
1879
1880 static void
1881 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1882 {
1883         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1884         __le32 sta_flags;
1885
1886         if (!sta || !sta_ht_inf->ht_supported)
1887                 goto done;
1888
1889         D_ASSOC("spatial multiplexing power save mode: %s\n",
1890                 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1891                 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1892                 "disabled");
1893
1894         sta_flags = il->stations[idx].sta.station_flags;
1895
1896         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1897
1898         switch (sta->smps_mode) {
1899         case IEEE80211_SMPS_STATIC:
1900                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1901                 break;
1902         case IEEE80211_SMPS_DYNAMIC:
1903                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1904                 break;
1905         case IEEE80211_SMPS_OFF:
1906                 break;
1907         default:
1908                 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1909                 break;
1910         }
1911
1912         sta_flags |=
1913             cpu_to_le32((u32) sta_ht_inf->
1914                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1915
1916         sta_flags |=
1917             cpu_to_le32((u32) sta_ht_inf->
1918                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1919
1920         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1921                 sta_flags |= STA_FLG_HT40_EN_MSK;
1922         else
1923                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1924
1925         il->stations[idx].sta.station_flags = sta_flags;
1926 done:
1927         return;
1928 }
1929
1930 /**
1931  * il_prep_station - Prepare station information for addition
1932  *
1933  * should be called with sta_lock held
1934  */
1935 u8
1936 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1937                 struct ieee80211_sta *sta)
1938 {
1939         struct il_station_entry *station;
1940         int i;
1941         u8 sta_id = IL_INVALID_STATION;
1942         u16 rate;
1943
1944         if (is_ap)
1945                 sta_id = IL_AP_ID;
1946         else if (is_broadcast_ether_addr(addr))
1947                 sta_id = il->hw_params.bcast_id;
1948         else
1949                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1950                         if (ether_addr_equal(il->stations[i].sta.sta.addr,
1951                                              addr)) {
1952                                 sta_id = i;
1953                                 break;
1954                         }
1955
1956                         if (!il->stations[i].used &&
1957                             sta_id == IL_INVALID_STATION)
1958                                 sta_id = i;
1959                 }
1960
1961         /*
1962          * These two conditions have the same outcome, but keep them
1963          * separate
1964          */
1965         if (unlikely(sta_id == IL_INVALID_STATION))
1966                 return sta_id;
1967
1968         /*
1969          * uCode is not able to deal with multiple requests to add a
1970          * station. Keep track if one is in progress so that we do not send
1971          * another.
1972          */
1973         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1974                 D_INFO("STA %d already in process of being added.\n", sta_id);
1975                 return sta_id;
1976         }
1977
1978         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1979             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1980             ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1981                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1982                         sta_id, addr);
1983                 return sta_id;
1984         }
1985
1986         station = &il->stations[sta_id];
1987         station->used = IL_STA_DRIVER_ACTIVE;
1988         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1989         il->num_stations++;
1990
1991         /* Set up the C_ADD_STA command to send to device */
1992         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1993         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1994         station->sta.mode = 0;
1995         station->sta.sta.sta_id = sta_id;
1996         station->sta.station_flags = 0;
1997
1998         /*
1999          * OK to call unconditionally, since local stations (IBSS BSSID
2000          * STA and broadcast STA) pass in a NULL sta, and mac80211
2001          * doesn't allow HT IBSS.
2002          */
2003         il_set_ht_add_station(il, sta_id, sta);
2004
2005         /* 3945 only */
2006         rate = (il->band == IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
2007         /* Turn on both antennas for the station... */
2008         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
2009
2010         return sta_id;
2011
2012 }
2013 EXPORT_SYMBOL_GPL(il_prep_station);
2014
2015 #define STA_WAIT_TIMEOUT (HZ/2)
2016
2017 /**
2018  * il_add_station_common -
2019  */
2020 int
2021 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2022                       struct ieee80211_sta *sta, u8 *sta_id_r)
2023 {
2024         unsigned long flags_spin;
2025         int ret = 0;
2026         u8 sta_id;
2027         struct il_addsta_cmd sta_cmd;
2028
2029         *sta_id_r = 0;
2030         spin_lock_irqsave(&il->sta_lock, flags_spin);
2031         sta_id = il_prep_station(il, addr, is_ap, sta);
2032         if (sta_id == IL_INVALID_STATION) {
2033                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2034                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2035                 return -EINVAL;
2036         }
2037
2038         /*
2039          * uCode is not able to deal with multiple requests to add a
2040          * station. Keep track if one is in progress so that we do not send
2041          * another.
2042          */
2043         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2044                 D_INFO("STA %d already in process of being added.\n", sta_id);
2045                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2046                 return -EEXIST;
2047         }
2048
2049         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2050             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2051                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2052                         sta_id, addr);
2053                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2054                 return -EEXIST;
2055         }
2056
2057         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2058         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2059                sizeof(struct il_addsta_cmd));
2060         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2061
2062         /* Add station to device's station table */
2063         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2064         if (ret) {
2065                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2066                 IL_ERR("Adding station %pM failed.\n",
2067                        il->stations[sta_id].sta.sta.addr);
2068                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2069                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2070                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2071         }
2072         *sta_id_r = sta_id;
2073         return ret;
2074 }
2075 EXPORT_SYMBOL(il_add_station_common);
2076
2077 /**
2078  * il_sta_ucode_deactivate - deactivate ucode status for a station
2079  *
2080  * il->sta_lock must be held
2081  */
2082 static void
2083 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2084 {
2085         /* Ucode must be active and driver must be non active */
2086         if ((il->stations[sta_id].
2087              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2088             IL_STA_UCODE_ACTIVE)
2089                 IL_ERR("removed non active STA %u\n", sta_id);
2090
2091         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2092
2093         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2094         D_ASSOC("Removed STA %u\n", sta_id);
2095 }
2096
2097 static int
2098 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2099                        bool temporary)
2100 {
2101         struct il_rx_pkt *pkt;
2102         int ret;
2103
2104         unsigned long flags_spin;
2105         struct il_rem_sta_cmd rm_sta_cmd;
2106
2107         struct il_host_cmd cmd = {
2108                 .id = C_REM_STA,
2109                 .len = sizeof(struct il_rem_sta_cmd),
2110                 .flags = CMD_SYNC,
2111                 .data = &rm_sta_cmd,
2112         };
2113
2114         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2115         rm_sta_cmd.num_sta = 1;
2116         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2117
2118         cmd.flags |= CMD_WANT_SKB;
2119
2120         ret = il_send_cmd(il, &cmd);
2121
2122         if (ret)
2123                 return ret;
2124
2125         pkt = (struct il_rx_pkt *)cmd.reply_page;
2126         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2127                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2128                 ret = -EIO;
2129         }
2130
2131         if (!ret) {
2132                 switch (pkt->u.rem_sta.status) {
2133                 case REM_STA_SUCCESS_MSK:
2134                         if (!temporary) {
2135                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2136                                 il_sta_ucode_deactivate(il, sta_id);
2137                                 spin_unlock_irqrestore(&il->sta_lock,
2138                                                        flags_spin);
2139                         }
2140                         D_ASSOC("C_REM_STA PASSED\n");
2141                         break;
2142                 default:
2143                         ret = -EIO;
2144                         IL_ERR("C_REM_STA failed\n");
2145                         break;
2146                 }
2147         }
2148         il_free_pages(il, cmd.reply_page);
2149
2150         return ret;
2151 }
2152
2153 /**
2154  * il_remove_station - Remove driver's knowledge of station.
2155  */
2156 int
2157 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2158 {
2159         unsigned long flags;
2160
2161         if (!il_is_ready(il)) {
2162                 D_INFO("Unable to remove station %pM, device not ready.\n",
2163                        addr);
2164                 /*
2165                  * It is typical for stations to be removed when we are
2166                  * going down. Return success since device will be down
2167                  * soon anyway
2168                  */
2169                 return 0;
2170         }
2171
2172         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2173
2174         if (WARN_ON(sta_id == IL_INVALID_STATION))
2175                 return -EINVAL;
2176
2177         spin_lock_irqsave(&il->sta_lock, flags);
2178
2179         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2180                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2181                 goto out_err;
2182         }
2183
2184         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2185                 D_INFO("Removing %pM but non UCODE active\n", addr);
2186                 goto out_err;
2187         }
2188
2189         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2190                 kfree(il->stations[sta_id].lq);
2191                 il->stations[sta_id].lq = NULL;
2192         }
2193
2194         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2195
2196         il->num_stations--;
2197
2198         BUG_ON(il->num_stations < 0);
2199
2200         spin_unlock_irqrestore(&il->sta_lock, flags);
2201
2202         return il_send_remove_station(il, addr, sta_id, false);
2203 out_err:
2204         spin_unlock_irqrestore(&il->sta_lock, flags);
2205         return -EINVAL;
2206 }
2207 EXPORT_SYMBOL_GPL(il_remove_station);
2208
2209 /**
2210  * il_clear_ucode_stations - clear ucode station table bits
2211  *
2212  * This function clears all the bits in the driver indicating
2213  * which stations are active in the ucode. Call when something
2214  * other than explicit station management would cause this in
2215  * the ucode, e.g. unassociated RXON.
2216  */
2217 void
2218 il_clear_ucode_stations(struct il_priv *il)
2219 {
2220         int i;
2221         unsigned long flags_spin;
2222         bool cleared = false;
2223
2224         D_INFO("Clearing ucode stations in driver\n");
2225
2226         spin_lock_irqsave(&il->sta_lock, flags_spin);
2227         for (i = 0; i < il->hw_params.max_stations; i++) {
2228                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2229                         D_INFO("Clearing ucode active for station %d\n", i);
2230                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2231                         cleared = true;
2232                 }
2233         }
2234         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2235
2236         if (!cleared)
2237                 D_INFO("No active stations found to be cleared\n");
2238 }
2239 EXPORT_SYMBOL(il_clear_ucode_stations);
2240
2241 /**
2242  * il_restore_stations() - Restore driver known stations to device
2243  *
2244  * All stations considered active by driver, but not present in ucode, is
2245  * restored.
2246  *
2247  * Function sleeps.
2248  */
2249 void
2250 il_restore_stations(struct il_priv *il)
2251 {
2252         struct il_addsta_cmd sta_cmd;
2253         struct il_link_quality_cmd lq;
2254         unsigned long flags_spin;
2255         int i;
2256         bool found = false;
2257         int ret;
2258         bool send_lq;
2259
2260         if (!il_is_ready(il)) {
2261                 D_INFO("Not ready yet, not restoring any stations.\n");
2262                 return;
2263         }
2264
2265         D_ASSOC("Restoring all known stations ... start.\n");
2266         spin_lock_irqsave(&il->sta_lock, flags_spin);
2267         for (i = 0; i < il->hw_params.max_stations; i++) {
2268                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2269                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2270                         D_ASSOC("Restoring sta %pM\n",
2271                                 il->stations[i].sta.sta.addr);
2272                         il->stations[i].sta.mode = 0;
2273                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2274                         found = true;
2275                 }
2276         }
2277
2278         for (i = 0; i < il->hw_params.max_stations; i++) {
2279                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2280                         memcpy(&sta_cmd, &il->stations[i].sta,
2281                                sizeof(struct il_addsta_cmd));
2282                         send_lq = false;
2283                         if (il->stations[i].lq) {
2284                                 memcpy(&lq, il->stations[i].lq,
2285                                        sizeof(struct il_link_quality_cmd));
2286                                 send_lq = true;
2287                         }
2288                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2289                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2290                         if (ret) {
2291                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2292                                 IL_ERR("Adding station %pM failed.\n",
2293                                        il->stations[i].sta.sta.addr);
2294                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2295                                 il->stations[i].used &=
2296                                     ~IL_STA_UCODE_INPROGRESS;
2297                                 spin_unlock_irqrestore(&il->sta_lock,
2298                                                        flags_spin);
2299                         }
2300                         /*
2301                          * Rate scaling has already been initialized, send
2302                          * current LQ command
2303                          */
2304                         if (send_lq)
2305                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2306                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2307                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2308                 }
2309         }
2310
2311         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2312         if (!found)
2313                 D_INFO("Restoring all known stations"
2314                        " .... no stations to be restored.\n");
2315         else
2316                 D_INFO("Restoring all known stations" " .... complete.\n");
2317 }
2318 EXPORT_SYMBOL(il_restore_stations);
2319
2320 int
2321 il_get_free_ucode_key_idx(struct il_priv *il)
2322 {
2323         int i;
2324
2325         for (i = 0; i < il->sta_key_max_num; i++)
2326                 if (!test_and_set_bit(i, &il->ucode_key_table))
2327                         return i;
2328
2329         return WEP_INVALID_OFFSET;
2330 }
2331 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2332
2333 void
2334 il_dealloc_bcast_stations(struct il_priv *il)
2335 {
2336         unsigned long flags;
2337         int i;
2338
2339         spin_lock_irqsave(&il->sta_lock, flags);
2340         for (i = 0; i < il->hw_params.max_stations; i++) {
2341                 if (!(il->stations[i].used & IL_STA_BCAST))
2342                         continue;
2343
2344                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2345                 il->num_stations--;
2346                 BUG_ON(il->num_stations < 0);
2347                 kfree(il->stations[i].lq);
2348                 il->stations[i].lq = NULL;
2349         }
2350         spin_unlock_irqrestore(&il->sta_lock, flags);
2351 }
2352 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2353
2354 #ifdef CONFIG_IWLEGACY_DEBUG
2355 static void
2356 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2357 {
2358         int i;
2359         D_RATE("lq station id 0x%x\n", lq->sta_id);
2360         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2361                lq->general_params.dual_stream_ant_msk);
2362
2363         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2364                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2365 }
2366 #else
2367 static inline void
2368 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2369 {
2370 }
2371 #endif
2372
2373 /**
2374  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2375  *
2376  * It sometimes happens when a HT rate has been in use and we
2377  * loose connectivity with AP then mac80211 will first tell us that the
2378  * current channel is not HT anymore before removing the station. In such a
2379  * scenario the RXON flags will be updated to indicate we are not
2380  * communicating HT anymore, but the LQ command may still contain HT rates.
2381  * Test for this to prevent driver from sending LQ command between the time
2382  * RXON flags are updated and when LQ command is updated.
2383  */
2384 static bool
2385 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2386 {
2387         int i;
2388
2389         if (il->ht.enabled)
2390                 return true;
2391
2392         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2393         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2394                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2395                         D_INFO("idx %d of LQ expects HT channel\n", i);
2396                         return false;
2397                 }
2398         }
2399         return true;
2400 }
2401
2402 /**
2403  * il_send_lq_cmd() - Send link quality command
2404  * @init: This command is sent as part of station initialization right
2405  *        after station has been added.
2406  *
2407  * The link quality command is sent as the last step of station creation.
2408  * This is the special case in which init is set and we call a callback in
2409  * this case to clear the state indicating that station creation is in
2410  * progress.
2411  */
2412 int
2413 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2414                u8 flags, bool init)
2415 {
2416         int ret = 0;
2417         unsigned long flags_spin;
2418
2419         struct il_host_cmd cmd = {
2420                 .id = C_TX_LINK_QUALITY_CMD,
2421                 .len = sizeof(struct il_link_quality_cmd),
2422                 .flags = flags,
2423                 .data = lq,
2424         };
2425
2426         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2427                 return -EINVAL;
2428
2429         spin_lock_irqsave(&il->sta_lock, flags_spin);
2430         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2431                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2432                 return -EINVAL;
2433         }
2434         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2435
2436         il_dump_lq_cmd(il, lq);
2437         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2438
2439         if (il_is_lq_table_valid(il, lq))
2440                 ret = il_send_cmd(il, &cmd);
2441         else
2442                 ret = -EINVAL;
2443
2444         if (cmd.flags & CMD_ASYNC)
2445                 return ret;
2446
2447         if (init) {
2448                 D_INFO("init LQ command complete,"
2449                        " clearing sta addition status for sta %d\n",
2450                        lq->sta_id);
2451                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2452                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2453                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2454         }
2455         return ret;
2456 }
2457 EXPORT_SYMBOL(il_send_lq_cmd);
2458
2459 int
2460 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2461                   struct ieee80211_sta *sta)
2462 {
2463         struct il_priv *il = hw->priv;
2464         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2465         int ret;
2466
2467         mutex_lock(&il->mutex);
2468         D_MAC80211("enter station %pM\n", sta->addr);
2469
2470         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2471         if (ret)
2472                 IL_ERR("Error removing station %pM\n", sta->addr);
2473
2474         D_MAC80211("leave ret %d\n", ret);
2475         mutex_unlock(&il->mutex);
2476
2477         return ret;
2478 }
2479 EXPORT_SYMBOL(il_mac_sta_remove);
2480
2481 /************************** RX-FUNCTIONS ****************************/
2482 /*
2483  * Rx theory of operation
2484  *
2485  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2486  * each of which point to Receive Buffers to be filled by the NIC.  These get
2487  * used not only for Rx frames, but for any command response or notification
2488  * from the NIC.  The driver and NIC manage the Rx buffers by means
2489  * of idxes into the circular buffer.
2490  *
2491  * Rx Queue Indexes
2492  * The host/firmware share two idx registers for managing the Rx buffers.
2493  *
2494  * The READ idx maps to the first position that the firmware may be writing
2495  * to -- the driver can read up to (but not including) this position and get
2496  * good data.
2497  * The READ idx is managed by the firmware once the card is enabled.
2498  *
2499  * The WRITE idx maps to the last position the driver has read from -- the
2500  * position preceding WRITE is the last slot the firmware can place a packet.
2501  *
2502  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2503  * WRITE = READ.
2504  *
2505  * During initialization, the host sets up the READ queue position to the first
2506  * IDX position, and WRITE to the last (READ - 1 wrapped)
2507  *
2508  * When the firmware places a packet in a buffer, it will advance the READ idx
2509  * and fire the RX interrupt.  The driver can then query the READ idx and
2510  * process as many packets as possible, moving the WRITE idx forward as it
2511  * resets the Rx queue buffers with new memory.
2512  *
2513  * The management in the driver is as follows:
2514  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2515  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2516  *   to replenish the iwl->rxq->rx_free.
2517  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2518  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2519  *   'processed' and 'read' driver idxes as well)
2520  * + A received packet is processed and handed to the kernel network stack,
2521  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2522  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2523  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2524  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2525  *   were enough free buffers and RX_STALLED is set it is cleared.
2526  *
2527  *
2528  * Driver sequence:
2529  *
2530  * il_rx_queue_alloc()   Allocates rx_free
2531  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2532  *                            il_rx_queue_restock
2533  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2534  *                            queue, updates firmware pointers, and updates
2535  *                            the WRITE idx.  If insufficient rx_free buffers
2536  *                            are available, schedules il_rx_replenish
2537  *
2538  * -- enable interrupts --
2539  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2540  *                            READ IDX, detaching the SKB from the pool.
2541  *                            Moves the packet buffer from queue to rx_used.
2542  *                            Calls il_rx_queue_restock to refill any empty
2543  *                            slots.
2544  * ...
2545  *
2546  */
2547
2548 /**
2549  * il_rx_queue_space - Return number of free slots available in queue.
2550  */
2551 int
2552 il_rx_queue_space(const struct il_rx_queue *q)
2553 {
2554         int s = q->read - q->write;
2555         if (s <= 0)
2556                 s += RX_QUEUE_SIZE;
2557         /* keep some buffer to not confuse full and empty queue */
2558         s -= 2;
2559         if (s < 0)
2560                 s = 0;
2561         return s;
2562 }
2563 EXPORT_SYMBOL(il_rx_queue_space);
2564
2565 /**
2566  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2567  */
2568 void
2569 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2570 {
2571         unsigned long flags;
2572         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2573         u32 reg;
2574
2575         spin_lock_irqsave(&q->lock, flags);
2576
2577         if (q->need_update == 0)
2578                 goto exit_unlock;
2579
2580         /* If power-saving is in use, make sure device is awake */
2581         if (test_bit(S_POWER_PMI, &il->status)) {
2582                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2583
2584                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2585                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2586                                reg);
2587                         il_set_bit(il, CSR_GP_CNTRL,
2588                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2589                         goto exit_unlock;
2590                 }
2591
2592                 q->write_actual = (q->write & ~0x7);
2593                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2594
2595                 /* Else device is assumed to be awake */
2596         } else {
2597                 /* Device expects a multiple of 8 */
2598                 q->write_actual = (q->write & ~0x7);
2599                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2600         }
2601
2602         q->need_update = 0;
2603
2604 exit_unlock:
2605         spin_unlock_irqrestore(&q->lock, flags);
2606 }
2607 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2608
2609 int
2610 il_rx_queue_alloc(struct il_priv *il)
2611 {
2612         struct il_rx_queue *rxq = &il->rxq;
2613         struct device *dev = &il->pci_dev->dev;
2614         int i;
2615
2616         spin_lock_init(&rxq->lock);
2617         INIT_LIST_HEAD(&rxq->rx_free);
2618         INIT_LIST_HEAD(&rxq->rx_used);
2619
2620         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2621         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2622                                      GFP_KERNEL);
2623         if (!rxq->bd)
2624                 goto err_bd;
2625
2626         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2627                                           &rxq->rb_stts_dma, GFP_KERNEL);
2628         if (!rxq->rb_stts)
2629                 goto err_rb;
2630
2631         /* Fill the rx_used queue with _all_ of the Rx buffers */
2632         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2633                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2634
2635         /* Set us so that we have processed and used all buffers, but have
2636          * not restocked the Rx queue with fresh buffers */
2637         rxq->read = rxq->write = 0;
2638         rxq->write_actual = 0;
2639         rxq->free_count = 0;
2640         rxq->need_update = 0;
2641         return 0;
2642
2643 err_rb:
2644         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2645                           rxq->bd_dma);
2646 err_bd:
2647         return -ENOMEM;
2648 }
2649 EXPORT_SYMBOL(il_rx_queue_alloc);
2650
2651 void
2652 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2653 {
2654         struct il_rx_pkt *pkt = rxb_addr(rxb);
2655         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2656
2657         if (!report->state) {
2658                 D_11H("Spectrum Measure Notification: Start\n");
2659                 return;
2660         }
2661
2662         memcpy(&il->measure_report, report, sizeof(*report));
2663         il->measurement_status |= MEASUREMENT_READY;
2664 }
2665 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2666
2667 /*
2668  * returns non-zero if packet should be dropped
2669  */
2670 int
2671 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2672                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2673 {
2674         u16 fc = le16_to_cpu(hdr->frame_control);
2675
2676         /*
2677          * All contexts have the same setting here due to it being
2678          * a module parameter, so OK to check any context.
2679          */
2680         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2681                 return 0;
2682
2683         if (!(fc & IEEE80211_FCTL_PROTECTED))
2684                 return 0;
2685
2686         D_RX("decrypt_res:0x%x\n", decrypt_res);
2687         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2688         case RX_RES_STATUS_SEC_TYPE_TKIP:
2689                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2690                  * Decryption will be done in SW. */
2691                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2692                     RX_RES_STATUS_BAD_KEY_TTAK)
2693                         break;
2694
2695         case RX_RES_STATUS_SEC_TYPE_WEP:
2696                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2697                     RX_RES_STATUS_BAD_ICV_MIC) {
2698                         /* bad ICV, the packet is destroyed since the
2699                          * decryption is inplace, drop it */
2700                         D_RX("Packet destroyed\n");
2701                         return -1;
2702                 }
2703         case RX_RES_STATUS_SEC_TYPE_CCMP:
2704                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2705                     RX_RES_STATUS_DECRYPT_OK) {
2706                         D_RX("hw decrypt successfully!!!\n");
2707                         stats->flag |= RX_FLAG_DECRYPTED;
2708                 }
2709                 break;
2710
2711         default:
2712                 break;
2713         }
2714         return 0;
2715 }
2716 EXPORT_SYMBOL(il_set_decrypted_flag);
2717
2718 /**
2719  * il_txq_update_write_ptr - Send new write idx to hardware
2720  */
2721 void
2722 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2723 {
2724         u32 reg = 0;
2725         int txq_id = txq->q.id;
2726
2727         if (txq->need_update == 0)
2728                 return;
2729
2730         /* if we're trying to save power */
2731         if (test_bit(S_POWER_PMI, &il->status)) {
2732                 /* wake up nic if it's powered down ...
2733                  * uCode will wake up, and interrupt us again, so next
2734                  * time we'll skip this part. */
2735                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2736
2737                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2738                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2739                                txq_id, reg);
2740                         il_set_bit(il, CSR_GP_CNTRL,
2741                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2742                         return;
2743                 }
2744
2745                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2746
2747                 /*
2748                  * else not in power-save mode,
2749                  * uCode will never sleep when we're
2750                  * trying to tx (during RFKILL, we're not trying to tx).
2751                  */
2752         } else
2753                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2754         txq->need_update = 0;
2755 }
2756 EXPORT_SYMBOL(il_txq_update_write_ptr);
2757
2758 /**
2759  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2760  */
2761 void
2762 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2763 {
2764         struct il_tx_queue *txq = &il->txq[txq_id];
2765         struct il_queue *q = &txq->q;
2766
2767         if (q->n_bd == 0)
2768                 return;
2769
2770         while (q->write_ptr != q->read_ptr) {
2771                 il->ops->txq_free_tfd(il, txq);
2772                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2773         }
2774 }
2775 EXPORT_SYMBOL(il_tx_queue_unmap);
2776
2777 /**
2778  * il_tx_queue_free - Deallocate DMA queue.
2779  * @txq: Transmit queue to deallocate.
2780  *
2781  * Empty queue by removing and destroying all BD's.
2782  * Free all buffers.
2783  * 0-fill, but do not free "txq" descriptor structure.
2784  */
2785 void
2786 il_tx_queue_free(struct il_priv *il, int txq_id)
2787 {
2788         struct il_tx_queue *txq = &il->txq[txq_id];
2789         struct device *dev = &il->pci_dev->dev;
2790         int i;
2791
2792         il_tx_queue_unmap(il, txq_id);
2793
2794         /* De-alloc array of command/tx buffers */
2795         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2796                 kfree(txq->cmd[i]);
2797
2798         /* De-alloc circular buffer of TFDs */
2799         if (txq->q.n_bd)
2800                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2801                                   txq->tfds, txq->q.dma_addr);
2802
2803         /* De-alloc array of per-TFD driver data */
2804         kfree(txq->skbs);
2805         txq->skbs = NULL;
2806
2807         /* deallocate arrays */
2808         kfree(txq->cmd);
2809         kfree(txq->meta);
2810         txq->cmd = NULL;
2811         txq->meta = NULL;
2812
2813         /* 0-fill queue descriptor structure */
2814         memset(txq, 0, sizeof(*txq));
2815 }
2816 EXPORT_SYMBOL(il_tx_queue_free);
2817
2818 /**
2819  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2820  */
2821 void
2822 il_cmd_queue_unmap(struct il_priv *il)
2823 {
2824         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2825         struct il_queue *q = &txq->q;
2826         int i;
2827
2828         if (q->n_bd == 0)
2829                 return;
2830
2831         while (q->read_ptr != q->write_ptr) {
2832                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2833
2834                 if (txq->meta[i].flags & CMD_MAPPED) {
2835                         pci_unmap_single(il->pci_dev,
2836                                          dma_unmap_addr(&txq->meta[i], mapping),
2837                                          dma_unmap_len(&txq->meta[i], len),
2838                                          PCI_DMA_BIDIRECTIONAL);
2839                         txq->meta[i].flags = 0;
2840                 }
2841
2842                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2843         }
2844
2845         i = q->n_win;
2846         if (txq->meta[i].flags & CMD_MAPPED) {
2847                 pci_unmap_single(il->pci_dev,
2848                                  dma_unmap_addr(&txq->meta[i], mapping),
2849                                  dma_unmap_len(&txq->meta[i], len),
2850                                  PCI_DMA_BIDIRECTIONAL);
2851                 txq->meta[i].flags = 0;
2852         }
2853 }
2854 EXPORT_SYMBOL(il_cmd_queue_unmap);
2855
2856 /**
2857  * il_cmd_queue_free - Deallocate DMA queue.
2858  * @txq: Transmit queue to deallocate.
2859  *
2860  * Empty queue by removing and destroying all BD's.
2861  * Free all buffers.
2862  * 0-fill, but do not free "txq" descriptor structure.
2863  */
2864 void
2865 il_cmd_queue_free(struct il_priv *il)
2866 {
2867         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2868         struct device *dev = &il->pci_dev->dev;
2869         int i;
2870
2871         il_cmd_queue_unmap(il);
2872
2873         /* De-alloc array of command/tx buffers */
2874         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2875                 kfree(txq->cmd[i]);
2876
2877         /* De-alloc circular buffer of TFDs */
2878         if (txq->q.n_bd)
2879                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2880                                   txq->tfds, txq->q.dma_addr);
2881
2882         /* deallocate arrays */
2883         kfree(txq->cmd);
2884         kfree(txq->meta);
2885         txq->cmd = NULL;
2886         txq->meta = NULL;
2887
2888         /* 0-fill queue descriptor structure */
2889         memset(txq, 0, sizeof(*txq));
2890 }
2891 EXPORT_SYMBOL(il_cmd_queue_free);
2892
2893 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2894  * DMA services
2895  *
2896  * Theory of operation
2897  *
2898  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2899  * of buffer descriptors, each of which points to one or more data buffers for
2900  * the device to read from or fill.  Driver and device exchange status of each
2901  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2902  * entries in each circular buffer, to protect against confusing empty and full
2903  * queue states.
2904  *
2905  * The device reads or writes the data in the queues via the device's several
2906  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2907  *
2908  * For Tx queue, there are low mark and high mark limits. If, after queuing
2909  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2910  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2911  * Tx queue resumed.
2912  *
2913  * See more detailed info in 4965.h.
2914  ***************************************************/
2915
2916 int
2917 il_queue_space(const struct il_queue *q)
2918 {
2919         int s = q->read_ptr - q->write_ptr;
2920
2921         if (q->read_ptr > q->write_ptr)
2922                 s -= q->n_bd;
2923
2924         if (s <= 0)
2925                 s += q->n_win;
2926         /* keep some reserve to not confuse empty and full situations */
2927         s -= 2;
2928         if (s < 0)
2929                 s = 0;
2930         return s;
2931 }
2932 EXPORT_SYMBOL(il_queue_space);
2933
2934
2935 /**
2936  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2937  */
2938 static int
2939 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2940 {
2941         /*
2942          * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2943          * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2944          */
2945         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2946         /* FIXME: remove q->n_bd */
2947         q->n_bd = TFD_QUEUE_SIZE_MAX;
2948
2949         q->n_win = slots;
2950         q->id = id;
2951
2952         /* slots_must be power-of-two size, otherwise
2953          * il_get_cmd_idx is broken. */
2954         BUG_ON(!is_power_of_2(slots));
2955
2956         q->low_mark = q->n_win / 4;
2957         if (q->low_mark < 4)
2958                 q->low_mark = 4;
2959
2960         q->high_mark = q->n_win / 8;
2961         if (q->high_mark < 2)
2962                 q->high_mark = 2;
2963
2964         q->write_ptr = q->read_ptr = 0;
2965
2966         return 0;
2967 }
2968
2969 /**
2970  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2971  */
2972 static int
2973 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2974 {
2975         struct device *dev = &il->pci_dev->dev;
2976         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2977
2978         /* Driver ilate data, only for Tx (not command) queues,
2979          * not shared with device. */
2980         if (id != il->cmd_queue) {
2981                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2982                                     sizeof(struct sk_buff *),
2983                                     GFP_KERNEL);
2984                 if (!txq->skbs) {
2985                         IL_ERR("Fail to alloc skbs\n");
2986                         goto error;
2987                 }
2988         } else
2989                 txq->skbs = NULL;
2990
2991         /* Circular buffer of transmit frame descriptors (TFDs),
2992          * shared with device */
2993         txq->tfds =
2994             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2995         if (!txq->tfds)
2996                 goto error;
2997
2998         txq->q.id = id;
2999
3000         return 0;
3001
3002 error:
3003         kfree(txq->skbs);
3004         txq->skbs = NULL;
3005
3006         return -ENOMEM;
3007 }
3008
3009 /**
3010  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3011  */
3012 int
3013 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3014 {
3015         int i, len, ret;
3016         int slots, actual_slots;
3017         struct il_tx_queue *txq = &il->txq[txq_id];
3018
3019         /*
3020          * Alloc buffer array for commands (Tx or other types of commands).
3021          * For the command queue (#4/#9), allocate command space + one big
3022          * command for scan, since scan command is very huge; the system will
3023          * not have two scans at the same time, so only one is needed.
3024          * For normal Tx queues (all other queues), no super-size command
3025          * space is needed.
3026          */
3027         if (txq_id == il->cmd_queue) {
3028                 slots = TFD_CMD_SLOTS;
3029                 actual_slots = slots + 1;
3030         } else {
3031                 slots = TFD_TX_CMD_SLOTS;
3032                 actual_slots = slots;
3033         }
3034
3035         txq->meta =
3036             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
3037         txq->cmd =
3038             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
3039
3040         if (!txq->meta || !txq->cmd)
3041                 goto out_free_arrays;
3042
3043         len = sizeof(struct il_device_cmd);
3044         for (i = 0; i < actual_slots; i++) {
3045                 /* only happens for cmd queue */
3046                 if (i == slots)
3047                         len = IL_MAX_CMD_SIZE;
3048
3049                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3050                 if (!txq->cmd[i])
3051                         goto err;
3052         }
3053
3054         /* Alloc driver data array and TFD circular buffer */
3055         ret = il_tx_queue_alloc(il, txq, txq_id);
3056         if (ret)
3057                 goto err;
3058
3059         txq->need_update = 0;
3060
3061         /*
3062          * For the default queues 0-3, set up the swq_id
3063          * already -- all others need to get one later
3064          * (if they need one at all).
3065          */
3066         if (txq_id < 4)
3067                 il_set_swq_id(txq, txq_id, txq_id);
3068
3069         /* Initialize queue's high/low-water marks, and head/tail idxes */
3070         il_queue_init(il, &txq->q, slots, txq_id);
3071
3072         /* Tell device where to find queue */
3073         il->ops->txq_init(il, txq);
3074
3075         return 0;
3076 err:
3077         for (i = 0; i < actual_slots; i++)
3078                 kfree(txq->cmd[i]);
3079 out_free_arrays:
3080         kfree(txq->meta);
3081         kfree(txq->cmd);
3082
3083         return -ENOMEM;
3084 }
3085 EXPORT_SYMBOL(il_tx_queue_init);
3086
3087 void
3088 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3089 {
3090         int slots, actual_slots;
3091         struct il_tx_queue *txq = &il->txq[txq_id];
3092
3093         if (txq_id == il->cmd_queue) {
3094                 slots = TFD_CMD_SLOTS;
3095                 actual_slots = TFD_CMD_SLOTS + 1;
3096         } else {
3097                 slots = TFD_TX_CMD_SLOTS;
3098                 actual_slots = TFD_TX_CMD_SLOTS;
3099         }
3100
3101         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3102         txq->need_update = 0;
3103
3104         /* Initialize queue's high/low-water marks, and head/tail idxes */
3105         il_queue_init(il, &txq->q, slots, txq_id);
3106
3107         /* Tell device where to find queue */
3108         il->ops->txq_init(il, txq);
3109 }
3110 EXPORT_SYMBOL(il_tx_queue_reset);
3111
3112 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3113
3114 /**
3115  * il_enqueue_hcmd - enqueue a uCode command
3116  * @il: device ilate data point
3117  * @cmd: a point to the ucode command structure
3118  *
3119  * The function returns < 0 values to indicate the operation is
3120  * failed. On success, it turns the idx (> 0) of command in the
3121  * command queue.
3122  */
3123 int
3124 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3125 {
3126         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3127         struct il_queue *q = &txq->q;
3128         struct il_device_cmd *out_cmd;
3129         struct il_cmd_meta *out_meta;
3130         dma_addr_t phys_addr;
3131         unsigned long flags;
3132         int len;
3133         u32 idx;
3134         u16 fix_size;
3135
3136         cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3137         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3138
3139         /* If any of the command structures end up being larger than
3140          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3141          * we will need to increase the size of the TFD entries
3142          * Also, check to see if command buffer should not exceed the size
3143          * of device_cmd and max_cmd_size. */
3144         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3145                !(cmd->flags & CMD_SIZE_HUGE));
3146         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3147
3148         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3149                 IL_WARN("Not sending command - %s KILL\n",
3150                         il_is_rfkill(il) ? "RF" : "CT");
3151                 return -EIO;
3152         }
3153
3154         spin_lock_irqsave(&il->hcmd_lock, flags);
3155
3156         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3157                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3158
3159                 IL_ERR("Restarting adapter due to command queue full\n");
3160                 queue_work(il->workqueue, &il->restart);
3161                 return -ENOSPC;
3162         }
3163
3164         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3165         out_cmd = txq->cmd[idx];
3166         out_meta = &txq->meta[idx];
3167
3168         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3169                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3170                 return -ENOSPC;
3171         }
3172
3173         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3174         out_meta->flags = cmd->flags | CMD_MAPPED;
3175         if (cmd->flags & CMD_WANT_SKB)
3176                 out_meta->source = cmd;
3177         if (cmd->flags & CMD_ASYNC)
3178                 out_meta->callback = cmd->callback;
3179
3180         out_cmd->hdr.cmd = cmd->id;
3181         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3182
3183         /* At this point, the out_cmd now has all of the incoming cmd
3184          * information */
3185
3186         out_cmd->hdr.flags = 0;
3187         out_cmd->hdr.sequence =
3188             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3189         if (cmd->flags & CMD_SIZE_HUGE)
3190                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3191         len = sizeof(struct il_device_cmd);
3192         if (idx == TFD_CMD_SLOTS)
3193                 len = IL_MAX_CMD_SIZE;
3194
3195 #ifdef CONFIG_IWLEGACY_DEBUG
3196         switch (out_cmd->hdr.cmd) {
3197         case C_TX_LINK_QUALITY_CMD:
3198         case C_SENSITIVITY:
3199                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3200                           "%d bytes at %d[%d]:%d\n",
3201                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3202                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3203                           q->write_ptr, idx, il->cmd_queue);
3204                 break;
3205         default:
3206                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3207                      "%d bytes at %d[%d]:%d\n",
3208                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3209                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3210                      idx, il->cmd_queue);
3211         }
3212 #endif
3213
3214         phys_addr =
3215             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3216                            PCI_DMA_BIDIRECTIONAL);
3217         if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3218                 idx = -ENOMEM;
3219                 goto out;
3220         }
3221         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3222         dma_unmap_len_set(out_meta, len, fix_size);
3223
3224         txq->need_update = 1;
3225
3226         if (il->ops->txq_update_byte_cnt_tbl)
3227                 /* Set up entry in queue's byte count circular buffer */
3228                 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3229
3230         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3231                                             U32_PAD(cmd->len));
3232
3233         /* Increment and update queue's write idx */
3234         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3235         il_txq_update_write_ptr(il, txq);
3236
3237 out:
3238         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3239         return idx;
3240 }
3241
3242 /**
3243  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3244  *
3245  * When FW advances 'R' idx, all entries between old and new 'R' idx
3246  * need to be reclaimed. As result, some free space forms.  If there is
3247  * enough free space (> low mark), wake the stack that feeds us.
3248  */
3249 static void
3250 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3251 {
3252         struct il_tx_queue *txq = &il->txq[txq_id];
3253         struct il_queue *q = &txq->q;
3254         int nfreed = 0;
3255
3256         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3257                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3258                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3259                        q->write_ptr, q->read_ptr);
3260                 return;
3261         }
3262
3263         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3264              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3265
3266                 if (nfreed++ > 0) {
3267                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3268                                q->write_ptr, q->read_ptr);
3269                         queue_work(il->workqueue, &il->restart);
3270                 }
3271
3272         }
3273 }
3274
3275 /**
3276  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3277  * @rxb: Rx buffer to reclaim
3278  *
3279  * If an Rx buffer has an async callback associated with it the callback
3280  * will be executed.  The attached skb (if present) will only be freed
3281  * if the callback returns 1
3282  */
3283 void
3284 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3285 {
3286         struct il_rx_pkt *pkt = rxb_addr(rxb);
3287         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3288         int txq_id = SEQ_TO_QUEUE(sequence);
3289         int idx = SEQ_TO_IDX(sequence);
3290         int cmd_idx;
3291         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3292         struct il_device_cmd *cmd;
3293         struct il_cmd_meta *meta;
3294         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3295         unsigned long flags;
3296
3297         /* If a Tx command is being handled and it isn't in the actual
3298          * command queue then there a command routing bug has been introduced
3299          * in the queue management code. */
3300         if (WARN
3301             (txq_id != il->cmd_queue,
3302              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3303              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3304              il->txq[il->cmd_queue].q.write_ptr)) {
3305                 il_print_hex_error(il, pkt, 32);
3306                 return;
3307         }
3308
3309         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3310         cmd = txq->cmd[cmd_idx];
3311         meta = &txq->meta[cmd_idx];
3312
3313         txq->time_stamp = jiffies;
3314
3315         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3316                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3317
3318         /* Input error checking is done when commands are added to queue. */
3319         if (meta->flags & CMD_WANT_SKB) {
3320                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3321                 rxb->page = NULL;
3322         } else if (meta->callback)
3323                 meta->callback(il, cmd, pkt);
3324
3325         spin_lock_irqsave(&il->hcmd_lock, flags);
3326
3327         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3328
3329         if (!(meta->flags & CMD_ASYNC)) {
3330                 clear_bit(S_HCMD_ACTIVE, &il->status);
3331                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3332                        il_get_cmd_string(cmd->hdr.cmd));
3333                 wake_up(&il->wait_command_queue);
3334         }
3335
3336         /* Mark as unmapped */
3337         meta->flags = 0;
3338
3339         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3340 }
3341 EXPORT_SYMBOL(il_tx_cmd_complete);
3342
3343 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3344 MODULE_VERSION(IWLWIFI_VERSION);
3345 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3346 MODULE_LICENSE("GPL");
3347
3348 /*
3349  * set bt_coex_active to true, uCode will do kill/defer
3350  * every time the priority line is asserted (BT is sending signals on the
3351  * priority line in the PCIx).
3352  * set bt_coex_active to false, uCode will ignore the BT activity and
3353  * perform the normal operation
3354  *
3355  * User might experience transmit issue on some platform due to WiFi/BT
3356  * co-exist problem. The possible behaviors are:
3357  *   Able to scan and finding all the available AP
3358  *   Not able to associate with any AP
3359  * On those platforms, WiFi communication can be restored by set
3360  * "bt_coex_active" module parameter to "false"
3361  *
3362  * default: bt_coex_active = true (BT_COEX_ENABLE)
3363  */
3364 static bool bt_coex_active = true;
3365 module_param(bt_coex_active, bool, S_IRUGO);
3366 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3367
3368 u32 il_debug_level;
3369 EXPORT_SYMBOL(il_debug_level);
3370
3371 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3372 EXPORT_SYMBOL(il_bcast_addr);
3373
3374 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3375 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3376 static void
3377 il_init_ht_hw_capab(const struct il_priv *il,
3378                     struct ieee80211_sta_ht_cap *ht_info,
3379                     enum ieee80211_band band)
3380 {
3381         u16 max_bit_rate = 0;
3382         u8 rx_chains_num = il->hw_params.rx_chains_num;
3383         u8 tx_chains_num = il->hw_params.tx_chains_num;
3384
3385         ht_info->cap = 0;
3386         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3387
3388         ht_info->ht_supported = true;
3389
3390         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3391         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3392         if (il->hw_params.ht40_channel & BIT(band)) {
3393                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3394                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3395                 ht_info->mcs.rx_mask[4] = 0x01;
3396                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3397         }
3398
3399         if (il->cfg->mod_params->amsdu_size_8K)
3400                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3401
3402         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3403         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3404
3405         ht_info->mcs.rx_mask[0] = 0xFF;
3406         if (rx_chains_num >= 2)
3407                 ht_info->mcs.rx_mask[1] = 0xFF;
3408         if (rx_chains_num >= 3)
3409                 ht_info->mcs.rx_mask[2] = 0xFF;
3410
3411         /* Highest supported Rx data rate */
3412         max_bit_rate *= rx_chains_num;
3413         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3414         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3415
3416         /* Tx MCS capabilities */
3417         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3418         if (tx_chains_num != rx_chains_num) {
3419                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3420                 ht_info->mcs.tx_params |=
3421                     ((tx_chains_num -
3422                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3423         }
3424 }
3425
3426 /**
3427  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3428  */
3429 int
3430 il_init_geos(struct il_priv *il)
3431 {
3432         struct il_channel_info *ch;
3433         struct ieee80211_supported_band *sband;
3434         struct ieee80211_channel *channels;
3435         struct ieee80211_channel *geo_ch;
3436         struct ieee80211_rate *rates;
3437         int i = 0;
3438         s8 max_tx_power = 0;
3439
3440         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3441             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3442                 D_INFO("Geography modes already initialized.\n");
3443                 set_bit(S_GEO_CONFIGURED, &il->status);
3444                 return 0;
3445         }
3446
3447         channels =
3448             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3449                     GFP_KERNEL);
3450         if (!channels)
3451                 return -ENOMEM;
3452
3453         rates =
3454             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3455                     GFP_KERNEL);
3456         if (!rates) {
3457                 kfree(channels);
3458                 return -ENOMEM;
3459         }
3460
3461         /* 5.2GHz channels start after the 2.4GHz channels */
3462         sband = &il->bands[IEEE80211_BAND_5GHZ];
3463         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3464         /* just OFDM */
3465         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3466         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3467
3468         if (il->cfg->sku & IL_SKU_N)
3469                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ);
3470
3471         sband = &il->bands[IEEE80211_BAND_2GHZ];
3472         sband->channels = channels;
3473         /* OFDM & CCK */
3474         sband->bitrates = rates;
3475         sband->n_bitrates = RATE_COUNT_LEGACY;
3476
3477         if (il->cfg->sku & IL_SKU_N)
3478                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ);
3479
3480         il->ieee_channels = channels;
3481         il->ieee_rates = rates;
3482
3483         for (i = 0; i < il->channel_count; i++) {
3484                 ch = &il->channel_info[i];
3485
3486                 if (!il_is_channel_valid(ch))
3487                         continue;
3488
3489                 sband = &il->bands[ch->band];
3490
3491                 geo_ch = &sband->channels[sband->n_channels++];
3492
3493                 geo_ch->center_freq =
3494                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3495                 geo_ch->max_power = ch->max_power_avg;
3496                 geo_ch->max_antenna_gain = 0xff;
3497                 geo_ch->hw_value = ch->channel;
3498
3499                 if (il_is_channel_valid(ch)) {
3500                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3501                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3502
3503                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3504                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3505
3506                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3507                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3508
3509                         geo_ch->flags |= ch->ht40_extension_channel;
3510
3511                         if (ch->max_power_avg > max_tx_power)
3512                                 max_tx_power = ch->max_power_avg;
3513                 } else {
3514                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3515                 }
3516
3517                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3518                        geo_ch->center_freq,
3519                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3520                        geo_ch->
3521                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3522                        geo_ch->flags);
3523         }
3524
3525         il->tx_power_device_lmt = max_tx_power;
3526         il->tx_power_user_lmt = max_tx_power;
3527         il->tx_power_next = max_tx_power;
3528
3529         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3530             (il->cfg->sku & IL_SKU_A)) {
3531                 IL_INFO("Incorrectly detected BG card as ABG. "
3532                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3533                         il->pci_dev->device, il->pci_dev->subsystem_device);
3534                 il->cfg->sku &= ~IL_SKU_A;
3535         }
3536
3537         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3538                 il->bands[IEEE80211_BAND_2GHZ].n_channels,
3539                 il->bands[IEEE80211_BAND_5GHZ].n_channels);
3540
3541         set_bit(S_GEO_CONFIGURED, &il->status);
3542
3543         return 0;
3544 }
3545 EXPORT_SYMBOL(il_init_geos);
3546
3547 /*
3548  * il_free_geos - undo allocations in il_init_geos
3549  */
3550 void
3551 il_free_geos(struct il_priv *il)
3552 {
3553         kfree(il->ieee_channels);
3554         kfree(il->ieee_rates);
3555         clear_bit(S_GEO_CONFIGURED, &il->status);
3556 }
3557 EXPORT_SYMBOL(il_free_geos);
3558
3559 static bool
3560 il_is_channel_extension(struct il_priv *il, enum ieee80211_band band,
3561                         u16 channel, u8 extension_chan_offset)
3562 {
3563         const struct il_channel_info *ch_info;
3564
3565         ch_info = il_get_channel_info(il, band, channel);
3566         if (!il_is_channel_valid(ch_info))
3567                 return false;
3568
3569         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3570                 return !(ch_info->
3571                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3572         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3573                 return !(ch_info->
3574                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3575
3576         return false;
3577 }
3578
3579 bool
3580 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3581 {
3582         if (!il->ht.enabled || !il->ht.is_40mhz)
3583                 return false;
3584
3585         /*
3586          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3587          * the bit will not set if it is pure 40MHz case
3588          */
3589         if (ht_cap && !ht_cap->ht_supported)
3590                 return false;
3591
3592 #ifdef CONFIG_IWLEGACY_DEBUGFS
3593         if (il->disable_ht40)
3594                 return false;
3595 #endif
3596
3597         return il_is_channel_extension(il, il->band,
3598                                        le16_to_cpu(il->staging.channel),
3599                                        il->ht.extension_chan_offset);
3600 }
3601 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3602
3603 static u16 noinline
3604 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3605 {
3606         u16 new_val;
3607         u16 beacon_factor;
3608
3609         /*
3610          * If mac80211 hasn't given us a beacon interval, program
3611          * the default into the device.
3612          */
3613         if (!beacon_val)
3614                 return DEFAULT_BEACON_INTERVAL;
3615
3616         /*
3617          * If the beacon interval we obtained from the peer
3618          * is too large, we'll have to wake up more often
3619          * (and in IBSS case, we'll beacon too much)
3620          *
3621          * For example, if max_beacon_val is 4096, and the
3622          * requested beacon interval is 7000, we'll have to
3623          * use 3500 to be able to wake up on the beacons.
3624          *
3625          * This could badly influence beacon detection stats.
3626          */
3627
3628         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3629         new_val = beacon_val / beacon_factor;
3630
3631         if (!new_val)
3632                 new_val = max_beacon_val;
3633
3634         return new_val;
3635 }
3636
3637 int
3638 il_send_rxon_timing(struct il_priv *il)
3639 {
3640         u64 tsf;
3641         s32 interval_tm, rem;
3642         struct ieee80211_conf *conf = NULL;
3643         u16 beacon_int;
3644         struct ieee80211_vif *vif = il->vif;
3645
3646         conf = &il->hw->conf;
3647
3648         lockdep_assert_held(&il->mutex);
3649
3650         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3651
3652         il->timing.timestamp = cpu_to_le64(il->timestamp);
3653         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3654
3655         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3656
3657         /*
3658          * TODO: For IBSS we need to get atim_win from mac80211,
3659          *       for now just always use 0
3660          */
3661         il->timing.atim_win = 0;
3662
3663         beacon_int =
3664             il_adjust_beacon_interval(beacon_int,
3665                                       il->hw_params.max_beacon_itrvl *
3666                                       TIME_UNIT);
3667         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3668
3669         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3670         interval_tm = beacon_int * TIME_UNIT;
3671         rem = do_div(tsf, interval_tm);
3672         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3673
3674         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3675
3676         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3677                 le16_to_cpu(il->timing.beacon_interval),
3678                 le32_to_cpu(il->timing.beacon_init_val),
3679                 le16_to_cpu(il->timing.atim_win));
3680
3681         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3682                                &il->timing);
3683 }
3684 EXPORT_SYMBOL(il_send_rxon_timing);
3685
3686 void
3687 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3688 {
3689         struct il_rxon_cmd *rxon = &il->staging;
3690
3691         if (hw_decrypt)
3692                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3693         else
3694                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3695
3696 }
3697 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3698
3699 /* validate RXON structure is valid */
3700 int
3701 il_check_rxon_cmd(struct il_priv *il)
3702 {
3703         struct il_rxon_cmd *rxon = &il->staging;
3704         bool error = false;
3705
3706         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3707                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3708                         IL_WARN("check 2.4G: wrong narrow\n");
3709                         error = true;
3710                 }
3711                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3712                         IL_WARN("check 2.4G: wrong radar\n");
3713                         error = true;
3714                 }
3715         } else {
3716                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3717                         IL_WARN("check 5.2G: not short slot!\n");
3718                         error = true;
3719                 }
3720                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3721                         IL_WARN("check 5.2G: CCK!\n");
3722                         error = true;
3723                 }
3724         }
3725         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3726                 IL_WARN("mac/bssid mcast!\n");
3727                 error = true;
3728         }
3729
3730         /* make sure basic rates 6Mbps and 1Mbps are supported */
3731         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3732             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3733                 IL_WARN("neither 1 nor 6 are basic\n");
3734                 error = true;
3735         }
3736
3737         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3738                 IL_WARN("aid > 2007\n");
3739                 error = true;
3740         }
3741
3742         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3743             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3744                 IL_WARN("CCK and short slot\n");
3745                 error = true;
3746         }
3747
3748         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3749             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3750                 IL_WARN("CCK and auto detect");
3751                 error = true;
3752         }
3753
3754         if ((rxon->
3755              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3756             RXON_FLG_TGG_PROTECT_MSK) {
3757                 IL_WARN("TGg but no auto-detect\n");
3758                 error = true;
3759         }
3760
3761         if (error)
3762                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3763
3764         if (error) {
3765                 IL_ERR("Invalid RXON\n");
3766                 return -EINVAL;
3767         }
3768         return 0;
3769 }
3770 EXPORT_SYMBOL(il_check_rxon_cmd);
3771
3772 /**
3773  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3774  * @il: staging_rxon is compared to active_rxon
3775  *
3776  * If the RXON structure is changing enough to require a new tune,
3777  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3778  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3779  */
3780 int
3781 il_full_rxon_required(struct il_priv *il)
3782 {
3783         const struct il_rxon_cmd *staging = &il->staging;
3784         const struct il_rxon_cmd *active = &il->active;
3785
3786 #define CHK(cond)                                                       \
3787         if ((cond)) {                                                   \
3788                 D_INFO("need full RXON - " #cond "\n"); \
3789                 return 1;                                               \
3790         }
3791
3792 #define CHK_NEQ(c1, c2)                                         \
3793         if ((c1) != (c2)) {                                     \
3794                 D_INFO("need full RXON - "      \
3795                                #c1 " != " #c2 " - %d != %d\n",  \
3796                                (c1), (c2));                     \
3797                 return 1;                                       \
3798         }
3799
3800         /* These items are only settable from the full RXON command */
3801         CHK(!il_is_associated(il));
3802         CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3803         CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3804         CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3805                                      active->wlap_bssid_addr));
3806         CHK_NEQ(staging->dev_type, active->dev_type);
3807         CHK_NEQ(staging->channel, active->channel);
3808         CHK_NEQ(staging->air_propagation, active->air_propagation);
3809         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3810                 active->ofdm_ht_single_stream_basic_rates);
3811         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3812                 active->ofdm_ht_dual_stream_basic_rates);
3813         CHK_NEQ(staging->assoc_id, active->assoc_id);
3814
3815         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3816          * be updated with the RXON_ASSOC command -- however only some
3817          * flag transitions are allowed using RXON_ASSOC */
3818
3819         /* Check if we are not switching bands */
3820         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3821                 active->flags & RXON_FLG_BAND_24G_MSK);
3822
3823         /* Check if we are switching association toggle */
3824         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3825                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3826
3827 #undef CHK
3828 #undef CHK_NEQ
3829
3830         return 0;
3831 }
3832 EXPORT_SYMBOL(il_full_rxon_required);
3833
3834 u8
3835 il_get_lowest_plcp(struct il_priv *il)
3836 {
3837         /*
3838          * Assign the lowest rate -- should really get this from
3839          * the beacon skb from mac80211.
3840          */
3841         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3842                 return RATE_1M_PLCP;
3843         else
3844                 return RATE_6M_PLCP;
3845 }
3846 EXPORT_SYMBOL(il_get_lowest_plcp);
3847
3848 static void
3849 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3850 {
3851         struct il_rxon_cmd *rxon = &il->staging;
3852
3853         if (!il->ht.enabled) {
3854                 rxon->flags &=
3855                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3856                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3857                       | RXON_FLG_HT_PROT_MSK);
3858                 return;
3859         }
3860
3861         rxon->flags |=
3862             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3863
3864         /* Set up channel bandwidth:
3865          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3866         /* clear the HT channel mode before set the mode */
3867         rxon->flags &=
3868             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3869         if (il_is_ht40_tx_allowed(il, NULL)) {
3870                 /* pure ht40 */
3871                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3872                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3873                         /* Note: control channel is opposite of extension channel */
3874                         switch (il->ht.extension_chan_offset) {
3875                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3876                                 rxon->flags &=
3877                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3878                                 break;
3879                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3880                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3881                                 break;
3882                         }
3883                 } else {
3884                         /* Note: control channel is opposite of extension channel */
3885                         switch (il->ht.extension_chan_offset) {
3886                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3887                                 rxon->flags &=
3888                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3889                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3890                                 break;
3891                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3892                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3893                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3894                                 break;
3895                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3896                         default:
3897                                 /* channel location only valid if in Mixed mode */
3898                                 IL_ERR("invalid extension channel offset\n");
3899                                 break;
3900                         }
3901                 }
3902         } else {
3903                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3904         }
3905
3906         if (il->ops->set_rxon_chain)
3907                 il->ops->set_rxon_chain(il);
3908
3909         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3910                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3911                 il->ht.protection, il->ht.extension_chan_offset);
3912 }
3913
3914 void
3915 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3916 {
3917         _il_set_rxon_ht(il, ht_conf);
3918 }
3919 EXPORT_SYMBOL(il_set_rxon_ht);
3920
3921 /* Return valid, unused, channel for a passive scan to reset the RF */
3922 u8
3923 il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band)
3924 {
3925         const struct il_channel_info *ch_info;
3926         int i;
3927         u8 channel = 0;
3928         u8 min, max;
3929
3930         if (band == IEEE80211_BAND_5GHZ) {
3931                 min = 14;
3932                 max = il->channel_count;
3933         } else {
3934                 min = 0;
3935                 max = 14;
3936         }
3937
3938         for (i = min; i < max; i++) {
3939                 channel = il->channel_info[i].channel;
3940                 if (channel == le16_to_cpu(il->staging.channel))
3941                         continue;
3942
3943                 ch_info = il_get_channel_info(il, band, channel);
3944                 if (il_is_channel_valid(ch_info))
3945                         break;
3946         }
3947
3948         return channel;
3949 }
3950 EXPORT_SYMBOL(il_get_single_channel_number);
3951
3952 /**
3953  * il_set_rxon_channel - Set the band and channel values in staging RXON
3954  * @ch: requested channel as a pointer to struct ieee80211_channel
3955
3956  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3957  * in the staging RXON flag structure based on the ch->band
3958  */
3959 int
3960 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3961 {
3962         enum ieee80211_band band = ch->band;
3963         u16 channel = ch->hw_value;
3964
3965         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3966                 return 0;
3967
3968         il->staging.channel = cpu_to_le16(channel);
3969         if (band == IEEE80211_BAND_5GHZ)
3970                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3971         else
3972                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3973
3974         il->band = band;
3975
3976         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3977
3978         return 0;
3979 }
3980 EXPORT_SYMBOL(il_set_rxon_channel);
3981
3982 void
3983 il_set_flags_for_band(struct il_priv *il, enum ieee80211_band band,
3984                       struct ieee80211_vif *vif)
3985 {
3986         if (band == IEEE80211_BAND_5GHZ) {
3987                 il->staging.flags &=
3988                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3989                       RXON_FLG_CCK_MSK);
3990                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3991         } else {
3992                 /* Copied from il_post_associate() */
3993                 if (vif && vif->bss_conf.use_short_slot)
3994                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3995                 else
3996                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3997
3998                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3999                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
4000                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
4001         }
4002 }
4003 EXPORT_SYMBOL(il_set_flags_for_band);
4004
4005 /*
4006  * initialize rxon structure with default values from eeprom
4007  */
4008 void
4009 il_connection_init_rx_config(struct il_priv *il)
4010 {
4011         const struct il_channel_info *ch_info;
4012
4013         memset(&il->staging, 0, sizeof(il->staging));
4014
4015         switch (il->iw_mode) {
4016         case NL80211_IFTYPE_UNSPECIFIED:
4017                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4018                 break;
4019         case NL80211_IFTYPE_STATION:
4020                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4021                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4022                 break;
4023         case NL80211_IFTYPE_ADHOC:
4024                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4025                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4026                 il->staging.filter_flags =
4027                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4028                 break;
4029         default:
4030                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4031                 return;
4032         }
4033
4034 #if 0
4035         /* TODO:  Figure out when short_preamble would be set and cache from
4036          * that */
4037         if (!hw_to_local(il->hw)->short_preamble)
4038                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4039         else
4040                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4041 #endif
4042
4043         ch_info =
4044             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4045
4046         if (!ch_info)
4047                 ch_info = &il->channel_info[0];
4048
4049         il->staging.channel = cpu_to_le16(ch_info->channel);
4050         il->band = ch_info->band;
4051
4052         il_set_flags_for_band(il, il->band, il->vif);
4053
4054         il->staging.ofdm_basic_rates =
4055             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4056         il->staging.cck_basic_rates =
4057             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4058
4059         /* clear both MIX and PURE40 mode flag */
4060         il->staging.flags &=
4061             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4062         if (il->vif)
4063                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4064
4065         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4066         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4067 }
4068 EXPORT_SYMBOL(il_connection_init_rx_config);
4069
4070 void
4071 il_set_rate(struct il_priv *il)
4072 {
4073         const struct ieee80211_supported_band *hw = NULL;
4074         struct ieee80211_rate *rate;
4075         int i;
4076
4077         hw = il_get_hw_mode(il, il->band);
4078         if (!hw) {
4079                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4080                 return;
4081         }
4082
4083         il->active_rate = 0;
4084
4085         for (i = 0; i < hw->n_bitrates; i++) {
4086                 rate = &(hw->bitrates[i]);
4087                 if (rate->hw_value < RATE_COUNT_LEGACY)
4088                         il->active_rate |= (1 << rate->hw_value);
4089         }
4090
4091         D_RATE("Set active_rate = %0x\n", il->active_rate);
4092
4093         il->staging.cck_basic_rates =
4094             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4095
4096         il->staging.ofdm_basic_rates =
4097             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4098 }
4099 EXPORT_SYMBOL(il_set_rate);
4100
4101 void
4102 il_chswitch_done(struct il_priv *il, bool is_success)
4103 {
4104         if (test_bit(S_EXIT_PENDING, &il->status))
4105                 return;
4106
4107         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4108                 ieee80211_chswitch_done(il->vif, is_success);
4109 }
4110 EXPORT_SYMBOL(il_chswitch_done);
4111
4112 void
4113 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4114 {
4115         struct il_rx_pkt *pkt = rxb_addr(rxb);
4116         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4117         struct il_rxon_cmd *rxon = (void *)&il->active;
4118
4119         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4120                 return;
4121
4122         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4123                 rxon->channel = csa->channel;
4124                 il->staging.channel = csa->channel;
4125                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4126                 il_chswitch_done(il, true);
4127         } else {
4128                 IL_ERR("CSA notif (fail) : channel %d\n",
4129                        le16_to_cpu(csa->channel));
4130                 il_chswitch_done(il, false);
4131         }
4132 }
4133 EXPORT_SYMBOL(il_hdl_csa);
4134
4135 #ifdef CONFIG_IWLEGACY_DEBUG
4136 void
4137 il_print_rx_config_cmd(struct il_priv *il)
4138 {
4139         struct il_rxon_cmd *rxon = &il->staging;
4140
4141         D_RADIO("RX CONFIG:\n");
4142         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4143         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4144         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4145         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4146         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4147         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4148         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4149         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4150         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4151         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4152 }
4153 EXPORT_SYMBOL(il_print_rx_config_cmd);
4154 #endif
4155 /**
4156  * il_irq_handle_error - called for HW or SW error interrupt from card
4157  */
4158 void
4159 il_irq_handle_error(struct il_priv *il)
4160 {
4161         /* Set the FW error flag -- cleared on il_down */
4162         set_bit(S_FW_ERROR, &il->status);
4163
4164         /* Cancel currently queued command. */
4165         clear_bit(S_HCMD_ACTIVE, &il->status);
4166
4167         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4168
4169         il->ops->dump_nic_error_log(il);
4170         if (il->ops->dump_fh)
4171                 il->ops->dump_fh(il, NULL, false);
4172 #ifdef CONFIG_IWLEGACY_DEBUG
4173         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4174                 il_print_rx_config_cmd(il);
4175 #endif
4176
4177         wake_up(&il->wait_command_queue);
4178
4179         /* Keep the restart process from trying to send host
4180          * commands by clearing the INIT status bit */
4181         clear_bit(S_READY, &il->status);
4182
4183         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4184                 IL_DBG(IL_DL_FW_ERRORS,
4185                        "Restarting adapter due to uCode error.\n");
4186
4187                 if (il->cfg->mod_params->restart_fw)
4188                         queue_work(il->workqueue, &il->restart);
4189         }
4190 }
4191 EXPORT_SYMBOL(il_irq_handle_error);
4192
4193 static int
4194 _il_apm_stop_master(struct il_priv *il)
4195 {
4196         int ret = 0;
4197
4198         /* stop device's busmaster DMA activity */
4199         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4200
4201         ret =
4202             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4203                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4204         if (ret < 0)
4205                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4206
4207         D_INFO("stop master\n");
4208
4209         return ret;
4210 }
4211
4212 void
4213 _il_apm_stop(struct il_priv *il)
4214 {
4215         lockdep_assert_held(&il->reg_lock);
4216
4217         D_INFO("Stop card, put in low power state\n");
4218
4219         /* Stop device's DMA activity */
4220         _il_apm_stop_master(il);
4221
4222         /* Reset the entire device */
4223         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4224
4225         udelay(10);
4226
4227         /*
4228          * Clear "initialization complete" bit to move adapter from
4229          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4230          */
4231         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4232 }
4233 EXPORT_SYMBOL(_il_apm_stop);
4234
4235 void
4236 il_apm_stop(struct il_priv *il)
4237 {
4238         unsigned long flags;
4239
4240         spin_lock_irqsave(&il->reg_lock, flags);
4241         _il_apm_stop(il);
4242         spin_unlock_irqrestore(&il->reg_lock, flags);
4243 }
4244 EXPORT_SYMBOL(il_apm_stop);
4245
4246 /*
4247  * Start up NIC's basic functionality after it has been reset
4248  * (e.g. after platform boot, or shutdown via il_apm_stop())
4249  * NOTE:  This does not load uCode nor start the embedded processor
4250  */
4251 int
4252 il_apm_init(struct il_priv *il)
4253 {
4254         int ret = 0;
4255         u16 lctl;
4256
4257         D_INFO("Init card's basic functions\n");
4258
4259         /*
4260          * Use "set_bit" below rather than "write", to preserve any hardware
4261          * bits already set by default after reset.
4262          */
4263
4264         /* Disable L0S exit timer (platform NMI Work/Around) */
4265         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4266                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4267
4268         /*
4269          * Disable L0s without affecting L1;
4270          *  don't wait for ICH L0s (ICH bug W/A)
4271          */
4272         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4273                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4274
4275         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4276         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4277
4278         /*
4279          * Enable HAP INTA (interrupt from management bus) to
4280          * wake device's PCI Express link L1a -> L0s
4281          * NOTE:  This is no-op for 3945 (non-existent bit)
4282          */
4283         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4284                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4285
4286         /*
4287          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4288          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4289          * If so (likely), disable L0S, so device moves directly L0->L1;
4290          *    costs negligible amount of power savings.
4291          * If not (unlikely), enable L0S, so there is at least some
4292          *    power savings, even without L1.
4293          */
4294         if (il->cfg->set_l0s) {
4295                 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4296                 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4297                         /* L1-ASPM enabled; disable(!) L0S  */
4298                         il_set_bit(il, CSR_GIO_REG,
4299                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4300                         D_POWER("L1 Enabled; Disabling L0S\n");
4301                 } else {
4302                         /* L1-ASPM disabled; enable(!) L0S */
4303                         il_clear_bit(il, CSR_GIO_REG,
4304                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4305                         D_POWER("L1 Disabled; Enabling L0S\n");
4306                 }
4307         }
4308
4309         /* Configure analog phase-lock-loop before activating to D0A */
4310         if (il->cfg->pll_cfg_val)
4311                 il_set_bit(il, CSR_ANA_PLL_CFG,
4312                            il->cfg->pll_cfg_val);
4313
4314         /*
4315          * Set "initialization complete" bit to move adapter from
4316          * D0U* --> D0A* (powered-up active) state.
4317          */
4318         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4319
4320         /*
4321          * Wait for clock stabilization; once stabilized, access to
4322          * device-internal resources is supported, e.g. il_wr_prph()
4323          * and accesses to uCode SRAM.
4324          */
4325         ret =
4326             _il_poll_bit(il, CSR_GP_CNTRL,
4327                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4328                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4329         if (ret < 0) {
4330                 D_INFO("Failed to init the card\n");
4331                 goto out;
4332         }
4333
4334         /*
4335          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4336          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4337          *
4338          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4339          * do not disable clocks.  This preserves any hardware bits already
4340          * set by default in "CLK_CTRL_REG" after reset.
4341          */
4342         if (il->cfg->use_bsm)
4343                 il_wr_prph(il, APMG_CLK_EN_REG,
4344                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4345         else
4346                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4347         udelay(20);
4348
4349         /* Disable L1-Active */
4350         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4351                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4352
4353 out:
4354         return ret;
4355 }
4356 EXPORT_SYMBOL(il_apm_init);
4357
4358 int
4359 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4360 {
4361         int ret;
4362         s8 prev_tx_power;
4363         bool defer;
4364
4365         lockdep_assert_held(&il->mutex);
4366
4367         if (il->tx_power_user_lmt == tx_power && !force)
4368                 return 0;
4369
4370         if (!il->ops->send_tx_power)
4371                 return -EOPNOTSUPP;
4372
4373         /* 0 dBm mean 1 milliwatt */
4374         if (tx_power < 0) {
4375                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4376                 return -EINVAL;
4377         }
4378
4379         if (tx_power > il->tx_power_device_lmt) {
4380                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4381                         tx_power, il->tx_power_device_lmt);
4382                 return -EINVAL;
4383         }
4384
4385         if (!il_is_ready_rf(il))
4386                 return -EIO;
4387
4388         /* scan complete and commit_rxon use tx_power_next value,
4389          * it always need to be updated for newest request */
4390         il->tx_power_next = tx_power;
4391
4392         /* do not set tx power when scanning or channel changing */
4393         defer = test_bit(S_SCANNING, &il->status) ||
4394             memcmp(&il->active, &il->staging, sizeof(il->staging));
4395         if (defer && !force) {
4396                 D_INFO("Deferring tx power set\n");
4397                 return 0;
4398         }
4399
4400         prev_tx_power = il->tx_power_user_lmt;
4401         il->tx_power_user_lmt = tx_power;
4402
4403         ret = il->ops->send_tx_power(il);
4404
4405         /* if fail to set tx_power, restore the orig. tx power */
4406         if (ret) {
4407                 il->tx_power_user_lmt = prev_tx_power;
4408                 il->tx_power_next = prev_tx_power;
4409         }
4410         return ret;
4411 }
4412 EXPORT_SYMBOL(il_set_tx_power);
4413
4414 void
4415 il_send_bt_config(struct il_priv *il)
4416 {
4417         struct il_bt_cmd bt_cmd = {
4418                 .lead_time = BT_LEAD_TIME_DEF,
4419                 .max_kill = BT_MAX_KILL_DEF,
4420                 .kill_ack_mask = 0,
4421                 .kill_cts_mask = 0,
4422         };
4423
4424         if (!bt_coex_active)
4425                 bt_cmd.flags = BT_COEX_DISABLE;
4426         else
4427                 bt_cmd.flags = BT_COEX_ENABLE;
4428
4429         D_INFO("BT coex %s\n",
4430                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4431
4432         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4433                 IL_ERR("failed to send BT Coex Config\n");
4434 }
4435 EXPORT_SYMBOL(il_send_bt_config);
4436
4437 int
4438 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4439 {
4440         struct il_stats_cmd stats_cmd = {
4441                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4442         };
4443
4444         if (flags & CMD_ASYNC)
4445                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4446                                              &stats_cmd, NULL);
4447         else
4448                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4449                                        &stats_cmd);
4450 }
4451 EXPORT_SYMBOL(il_send_stats_request);
4452
4453 void
4454 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4455 {
4456 #ifdef CONFIG_IWLEGACY_DEBUG
4457         struct il_rx_pkt *pkt = rxb_addr(rxb);
4458         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4459         D_RX("sleep mode: %d, src: %d\n",
4460              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4461 #endif
4462 }
4463 EXPORT_SYMBOL(il_hdl_pm_sleep);
4464
4465 void
4466 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4467 {
4468         struct il_rx_pkt *pkt = rxb_addr(rxb);
4469         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4470         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4471                 il_get_cmd_string(pkt->hdr.cmd));
4472         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4473 }
4474 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4475
4476 void
4477 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4478 {
4479         struct il_rx_pkt *pkt = rxb_addr(rxb);
4480
4481         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4482                "seq 0x%04X ser 0x%08X\n",
4483                le32_to_cpu(pkt->u.err_resp.error_type),
4484                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4485                pkt->u.err_resp.cmd_id,
4486                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4487                le32_to_cpu(pkt->u.err_resp.error_info));
4488 }
4489 EXPORT_SYMBOL(il_hdl_error);
4490
4491 void
4492 il_clear_isr_stats(struct il_priv *il)
4493 {
4494         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4495 }
4496
4497 int
4498 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4499                const struct ieee80211_tx_queue_params *params)
4500 {
4501         struct il_priv *il = hw->priv;
4502         unsigned long flags;
4503         int q;
4504
4505         D_MAC80211("enter\n");
4506
4507         if (!il_is_ready_rf(il)) {
4508                 D_MAC80211("leave - RF not ready\n");
4509                 return -EIO;
4510         }
4511
4512         if (queue >= AC_NUM) {
4513                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4514                 return 0;
4515         }
4516
4517         q = AC_NUM - 1 - queue;
4518
4519         spin_lock_irqsave(&il->lock, flags);
4520
4521         il->qos_data.def_qos_parm.ac[q].cw_min =
4522             cpu_to_le16(params->cw_min);
4523         il->qos_data.def_qos_parm.ac[q].cw_max =
4524             cpu_to_le16(params->cw_max);
4525         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4526         il->qos_data.def_qos_parm.ac[q].edca_txop =
4527             cpu_to_le16((params->txop * 32));
4528
4529         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4530
4531         spin_unlock_irqrestore(&il->lock, flags);
4532
4533         D_MAC80211("leave\n");
4534         return 0;
4535 }
4536 EXPORT_SYMBOL(il_mac_conf_tx);
4537
4538 int
4539 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4540 {
4541         struct il_priv *il = hw->priv;
4542         int ret;
4543
4544         D_MAC80211("enter\n");
4545
4546         ret = (il->ibss_manager == IL_IBSS_MANAGER);
4547
4548         D_MAC80211("leave ret %d\n", ret);
4549         return ret;
4550 }
4551 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4552
4553 static int
4554 il_set_mode(struct il_priv *il)
4555 {
4556         il_connection_init_rx_config(il);
4557
4558         if (il->ops->set_rxon_chain)
4559                 il->ops->set_rxon_chain(il);
4560
4561         return il_commit_rxon(il);
4562 }
4563
4564 int
4565 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4566 {
4567         struct il_priv *il = hw->priv;
4568         int err;
4569         bool reset;
4570
4571         mutex_lock(&il->mutex);
4572         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4573
4574         if (!il_is_ready_rf(il)) {
4575                 IL_WARN("Try to add interface when device not ready\n");
4576                 err = -EINVAL;
4577                 goto out;
4578         }
4579
4580         /*
4581          * We do not support multiple virtual interfaces, but on hardware reset
4582          * we have to add the same interface again.
4583          */
4584         reset = (il->vif == vif);
4585         if (il->vif && !reset) {
4586                 err = -EOPNOTSUPP;
4587                 goto out;
4588         }
4589
4590         il->vif = vif;
4591         il->iw_mode = vif->type;
4592
4593         err = il_set_mode(il);
4594         if (err) {
4595                 IL_WARN("Fail to set mode %d\n", vif->type);
4596                 if (!reset) {
4597                         il->vif = NULL;
4598                         il->iw_mode = NL80211_IFTYPE_STATION;
4599                 }
4600         }
4601
4602 out:
4603         D_MAC80211("leave err %d\n", err);
4604         mutex_unlock(&il->mutex);
4605
4606         return err;
4607 }
4608 EXPORT_SYMBOL(il_mac_add_interface);
4609
4610 static void
4611 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4612 {
4613         lockdep_assert_held(&il->mutex);
4614
4615         if (il->scan_vif == vif) {
4616                 il_scan_cancel_timeout(il, 200);
4617                 il_force_scan_end(il);
4618         }
4619
4620         il_set_mode(il);
4621 }
4622
4623 void
4624 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4625 {
4626         struct il_priv *il = hw->priv;
4627
4628         mutex_lock(&il->mutex);
4629         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4630
4631         WARN_ON(il->vif != vif);
4632         il->vif = NULL;
4633         il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4634         il_teardown_interface(il, vif);
4635         eth_zero_addr(il->bssid);
4636
4637         D_MAC80211("leave\n");
4638         mutex_unlock(&il->mutex);
4639 }
4640 EXPORT_SYMBOL(il_mac_remove_interface);
4641
4642 int
4643 il_alloc_txq_mem(struct il_priv *il)
4644 {
4645         if (!il->txq)
4646                 il->txq =
4647                     kzalloc(sizeof(struct il_tx_queue) *
4648                             il->cfg->num_of_queues, GFP_KERNEL);
4649         if (!il->txq) {
4650                 IL_ERR("Not enough memory for txq\n");
4651                 return -ENOMEM;
4652         }
4653         return 0;
4654 }
4655 EXPORT_SYMBOL(il_alloc_txq_mem);
4656
4657 void
4658 il_free_txq_mem(struct il_priv *il)
4659 {
4660         kfree(il->txq);
4661         il->txq = NULL;
4662 }
4663 EXPORT_SYMBOL(il_free_txq_mem);
4664
4665 int
4666 il_force_reset(struct il_priv *il, bool external)
4667 {
4668         struct il_force_reset *force_reset;
4669
4670         if (test_bit(S_EXIT_PENDING, &il->status))
4671                 return -EINVAL;
4672
4673         force_reset = &il->force_reset;
4674         force_reset->reset_request_count++;
4675         if (!external) {
4676                 if (force_reset->last_force_reset_jiffies &&
4677                     time_after(force_reset->last_force_reset_jiffies +
4678                                force_reset->reset_duration, jiffies)) {
4679                         D_INFO("force reset rejected\n");
4680                         force_reset->reset_reject_count++;
4681                         return -EAGAIN;
4682                 }
4683         }
4684         force_reset->reset_success_count++;
4685         force_reset->last_force_reset_jiffies = jiffies;
4686
4687         /*
4688          * if the request is from external(ex: debugfs),
4689          * then always perform the request in regardless the module
4690          * parameter setting
4691          * if the request is from internal (uCode error or driver
4692          * detect failure), then fw_restart module parameter
4693          * need to be check before performing firmware reload
4694          */
4695
4696         if (!external && !il->cfg->mod_params->restart_fw) {
4697                 D_INFO("Cancel firmware reload based on "
4698                        "module parameter setting\n");
4699                 return 0;
4700         }
4701
4702         IL_ERR("On demand firmware reload\n");
4703
4704         /* Set the FW error flag -- cleared on il_down */
4705         set_bit(S_FW_ERROR, &il->status);
4706         wake_up(&il->wait_command_queue);
4707         /*
4708          * Keep the restart process from trying to send host
4709          * commands by clearing the INIT status bit
4710          */
4711         clear_bit(S_READY, &il->status);
4712         queue_work(il->workqueue, &il->restart);
4713
4714         return 0;
4715 }
4716 EXPORT_SYMBOL(il_force_reset);
4717
4718 int
4719 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4720                         enum nl80211_iftype newtype, bool newp2p)
4721 {
4722         struct il_priv *il = hw->priv;
4723         int err;
4724
4725         mutex_lock(&il->mutex);
4726         D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4727                     vif->type, vif->addr, newtype, newp2p);
4728
4729         if (newp2p) {
4730                 err = -EOPNOTSUPP;
4731                 goto out;
4732         }
4733
4734         if (!il->vif || !il_is_ready_rf(il)) {
4735                 /*
4736                  * Huh? But wait ... this can maybe happen when
4737                  * we're in the middle of a firmware restart!
4738                  */
4739                 err = -EBUSY;
4740                 goto out;
4741         }
4742
4743         /* success */
4744         vif->type = newtype;
4745         vif->p2p = false;
4746         il->iw_mode = newtype;
4747         il_teardown_interface(il, vif);
4748         err = 0;
4749
4750 out:
4751         D_MAC80211("leave err %d\n", err);
4752         mutex_unlock(&il->mutex);
4753
4754         return err;
4755 }
4756 EXPORT_SYMBOL(il_mac_change_interface);
4757
4758 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4759                   u32 queues, bool drop)
4760 {
4761         struct il_priv *il = hw->priv;
4762         unsigned long timeout = jiffies + msecs_to_jiffies(500);
4763         int i;
4764
4765         mutex_lock(&il->mutex);
4766         D_MAC80211("enter\n");
4767
4768         if (il->txq == NULL)
4769                 goto out;
4770
4771         for (i = 0; i < il->hw_params.max_txq_num; i++) {
4772                 struct il_queue *q;
4773
4774                 if (i == il->cmd_queue)
4775                         continue;
4776
4777                 q = &il->txq[i].q;
4778                 if (q->read_ptr == q->write_ptr)
4779                         continue;
4780
4781                 if (time_after(jiffies, timeout)) {
4782                         IL_ERR("Failed to flush queue %d\n", q->id);
4783                         break;
4784                 }
4785
4786                 msleep(20);
4787         }
4788 out:
4789         D_MAC80211("leave\n");
4790         mutex_unlock(&il->mutex);
4791 }
4792 EXPORT_SYMBOL(il_mac_flush);
4793
4794 /*
4795  * On every watchdog tick we check (latest) time stamp. If it does not
4796  * change during timeout period and queue is not empty we reset firmware.
4797  */
4798 static int
4799 il_check_stuck_queue(struct il_priv *il, int cnt)
4800 {
4801         struct il_tx_queue *txq = &il->txq[cnt];
4802         struct il_queue *q = &txq->q;
4803         unsigned long timeout;
4804         unsigned long now = jiffies;
4805         int ret;
4806
4807         if (q->read_ptr == q->write_ptr) {
4808                 txq->time_stamp = now;
4809                 return 0;
4810         }
4811
4812         timeout =
4813             txq->time_stamp +
4814             msecs_to_jiffies(il->cfg->wd_timeout);
4815
4816         if (time_after(now, timeout)) {
4817                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4818                        jiffies_to_msecs(now - txq->time_stamp));
4819                 ret = il_force_reset(il, false);
4820                 return (ret == -EAGAIN) ? 0 : 1;
4821         }
4822
4823         return 0;
4824 }
4825
4826 /*
4827  * Making watchdog tick be a quarter of timeout assure we will
4828  * discover the queue hung between timeout and 1.25*timeout
4829  */
4830 #define IL_WD_TICK(timeout) ((timeout) / 4)
4831
4832 /*
4833  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4834  * we reset the firmware. If everything is fine just rearm the timer.
4835  */
4836 void
4837 il_bg_watchdog(unsigned long data)
4838 {
4839         struct il_priv *il = (struct il_priv *)data;
4840         int cnt;
4841         unsigned long timeout;
4842
4843         if (test_bit(S_EXIT_PENDING, &il->status))
4844                 return;
4845
4846         timeout = il->cfg->wd_timeout;
4847         if (timeout == 0)
4848                 return;
4849
4850         /* monitor and check for stuck cmd queue */
4851         if (il_check_stuck_queue(il, il->cmd_queue))
4852                 return;
4853
4854         /* monitor and check for other stuck queues */
4855         for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4856                 /* skip as we already checked the command queue */
4857                 if (cnt == il->cmd_queue)
4858                         continue;
4859                 if (il_check_stuck_queue(il, cnt))
4860                         return;
4861         }
4862
4863         mod_timer(&il->watchdog,
4864                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4865 }
4866 EXPORT_SYMBOL(il_bg_watchdog);
4867
4868 void
4869 il_setup_watchdog(struct il_priv *il)
4870 {
4871         unsigned int timeout = il->cfg->wd_timeout;
4872
4873         if (timeout)
4874                 mod_timer(&il->watchdog,
4875                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4876         else
4877                 del_timer(&il->watchdog);
4878 }
4879 EXPORT_SYMBOL(il_setup_watchdog);
4880
4881 /*
4882  * extended beacon time format
4883  * time in usec will be changed into a 32-bit value in extended:internal format
4884  * the extended part is the beacon counts
4885  * the internal part is the time in usec within one beacon interval
4886  */
4887 u32
4888 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4889 {
4890         u32 quot;
4891         u32 rem;
4892         u32 interval = beacon_interval * TIME_UNIT;
4893
4894         if (!interval || !usec)
4895                 return 0;
4896
4897         quot =
4898             (usec /
4899              interval) & (il_beacon_time_mask_high(il,
4900                                                    il->hw_params.
4901                                                    beacon_time_tsf_bits) >> il->
4902                           hw_params.beacon_time_tsf_bits);
4903         rem =
4904             (usec % interval) & il_beacon_time_mask_low(il,
4905                                                         il->hw_params.
4906                                                         beacon_time_tsf_bits);
4907
4908         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4909 }
4910 EXPORT_SYMBOL(il_usecs_to_beacons);
4911
4912 /* base is usually what we get from ucode with each received frame,
4913  * the same as HW timer counter counting down
4914  */
4915 __le32
4916 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4917                    u32 beacon_interval)
4918 {
4919         u32 base_low = base & il_beacon_time_mask_low(il,
4920                                                       il->hw_params.
4921                                                       beacon_time_tsf_bits);
4922         u32 addon_low = addon & il_beacon_time_mask_low(il,
4923                                                         il->hw_params.
4924                                                         beacon_time_tsf_bits);
4925         u32 interval = beacon_interval * TIME_UNIT;
4926         u32 res = (base & il_beacon_time_mask_high(il,
4927                                                    il->hw_params.
4928                                                    beacon_time_tsf_bits)) +
4929             (addon & il_beacon_time_mask_high(il,
4930                                               il->hw_params.
4931                                               beacon_time_tsf_bits));
4932
4933         if (base_low > addon_low)
4934                 res += base_low - addon_low;
4935         else if (base_low < addon_low) {
4936                 res += interval + base_low - addon_low;
4937                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4938         } else
4939                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4940
4941         return cpu_to_le32(res);
4942 }
4943 EXPORT_SYMBOL(il_add_beacon_time);
4944
4945 #ifdef CONFIG_PM_SLEEP
4946
4947 static int
4948 il_pci_suspend(struct device *device)
4949 {
4950         struct pci_dev *pdev = to_pci_dev(device);
4951         struct il_priv *il = pci_get_drvdata(pdev);
4952
4953         /*
4954          * This function is called when system goes into suspend state
4955          * mac80211 will call il_mac_stop() from the mac80211 suspend function
4956          * first but since il_mac_stop() has no knowledge of who the caller is,
4957          * it will not call apm_ops.stop() to stop the DMA operation.
4958          * Calling apm_ops.stop here to make sure we stop the DMA.
4959          */
4960         il_apm_stop(il);
4961
4962         return 0;
4963 }
4964
4965 static int
4966 il_pci_resume(struct device *device)
4967 {
4968         struct pci_dev *pdev = to_pci_dev(device);
4969         struct il_priv *il = pci_get_drvdata(pdev);
4970         bool hw_rfkill = false;
4971
4972         /*
4973          * We disable the RETRY_TIMEOUT register (0x41) to keep
4974          * PCI Tx retries from interfering with C3 CPU state.
4975          */
4976         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4977
4978         il_enable_interrupts(il);
4979
4980         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4981                 hw_rfkill = true;
4982
4983         if (hw_rfkill)
4984                 set_bit(S_RFKILL, &il->status);
4985         else
4986                 clear_bit(S_RFKILL, &il->status);
4987
4988         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4989
4990         return 0;
4991 }
4992
4993 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4994 EXPORT_SYMBOL(il_pm_ops);
4995
4996 #endif /* CONFIG_PM_SLEEP */
4997
4998 static void
4999 il_update_qos(struct il_priv *il)
5000 {
5001         if (test_bit(S_EXIT_PENDING, &il->status))
5002                 return;
5003
5004         il->qos_data.def_qos_parm.qos_flags = 0;
5005
5006         if (il->qos_data.qos_active)
5007                 il->qos_data.def_qos_parm.qos_flags |=
5008                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5009
5010         if (il->ht.enabled)
5011                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5012
5013         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5014               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5015
5016         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5017                               &il->qos_data.def_qos_parm, NULL);
5018 }
5019
5020 /**
5021  * il_mac_config - mac80211 config callback
5022  */
5023 int
5024 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5025 {
5026         struct il_priv *il = hw->priv;
5027         const struct il_channel_info *ch_info;
5028         struct ieee80211_conf *conf = &hw->conf;
5029         struct ieee80211_channel *channel = conf->chandef.chan;
5030         struct il_ht_config *ht_conf = &il->current_ht_config;
5031         unsigned long flags = 0;
5032         int ret = 0;
5033         u16 ch;
5034         int scan_active = 0;
5035         bool ht_changed = false;
5036
5037         mutex_lock(&il->mutex);
5038         D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5039                    changed);
5040
5041         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5042                 scan_active = 1;
5043                 D_MAC80211("scan active\n");
5044         }
5045
5046         if (changed &
5047             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5048                 /* mac80211 uses static for non-HT which is what we want */
5049                 il->current_ht_config.smps = conf->smps_mode;
5050
5051                 /*
5052                  * Recalculate chain counts.
5053                  *
5054                  * If monitor mode is enabled then mac80211 will
5055                  * set up the SM PS mode to OFF if an HT channel is
5056                  * configured.
5057                  */
5058                 if (il->ops->set_rxon_chain)
5059                         il->ops->set_rxon_chain(il);
5060         }
5061
5062         /* during scanning mac80211 will delay channel setting until
5063          * scan finish with changed = 0
5064          */
5065         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5066
5067                 if (scan_active)
5068                         goto set_ch_out;
5069
5070                 ch = channel->hw_value;
5071                 ch_info = il_get_channel_info(il, channel->band, ch);
5072                 if (!il_is_channel_valid(ch_info)) {
5073                         D_MAC80211("leave - invalid channel\n");
5074                         ret = -EINVAL;
5075                         goto set_ch_out;
5076                 }
5077
5078                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5079                     !il_is_channel_ibss(ch_info)) {
5080                         D_MAC80211("leave - not IBSS channel\n");
5081                         ret = -EINVAL;
5082                         goto set_ch_out;
5083                 }
5084
5085                 spin_lock_irqsave(&il->lock, flags);
5086
5087                 /* Configure HT40 channels */
5088                 if (il->ht.enabled != conf_is_ht(conf)) {
5089                         il->ht.enabled = conf_is_ht(conf);
5090                         ht_changed = true;
5091                 }
5092                 if (il->ht.enabled) {
5093                         if (conf_is_ht40_minus(conf)) {
5094                                 il->ht.extension_chan_offset =
5095                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5096                                 il->ht.is_40mhz = true;
5097                         } else if (conf_is_ht40_plus(conf)) {
5098                                 il->ht.extension_chan_offset =
5099                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5100                                 il->ht.is_40mhz = true;
5101                         } else {
5102                                 il->ht.extension_chan_offset =
5103                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5104                                 il->ht.is_40mhz = false;
5105                         }
5106                 } else
5107                         il->ht.is_40mhz = false;
5108
5109                 /*
5110                  * Default to no protection. Protection mode will
5111                  * later be set from BSS config in il_ht_conf
5112                  */
5113                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5114
5115                 /* if we are switching from ht to 2.4 clear flags
5116                  * from any ht related info since 2.4 does not
5117                  * support ht */
5118                 if ((le16_to_cpu(il->staging.channel) != ch))
5119                         il->staging.flags = 0;
5120
5121                 il_set_rxon_channel(il, channel);
5122                 il_set_rxon_ht(il, ht_conf);
5123
5124                 il_set_flags_for_band(il, channel->band, il->vif);
5125
5126                 spin_unlock_irqrestore(&il->lock, flags);
5127
5128                 if (il->ops->update_bcast_stations)
5129                         ret = il->ops->update_bcast_stations(il);
5130
5131 set_ch_out:
5132                 /* The list of supported rates and rate mask can be different
5133                  * for each band; since the band may have changed, reset
5134                  * the rate mask to what mac80211 lists */
5135                 il_set_rate(il);
5136         }
5137
5138         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5139                 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5140                 ret = il_power_update_mode(il, false);
5141                 if (ret)
5142                         D_MAC80211("Error setting sleep level\n");
5143         }
5144
5145         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5146                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5147                            conf->power_level);
5148
5149                 il_set_tx_power(il, conf->power_level, false);
5150         }
5151
5152         if (!il_is_ready(il)) {
5153                 D_MAC80211("leave - not ready\n");
5154                 goto out;
5155         }
5156
5157         if (scan_active)
5158                 goto out;
5159
5160         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5161                 il_commit_rxon(il);
5162         else
5163                 D_INFO("Not re-sending same RXON configuration.\n");
5164         if (ht_changed)
5165                 il_update_qos(il);
5166
5167 out:
5168         D_MAC80211("leave ret %d\n", ret);
5169         mutex_unlock(&il->mutex);
5170
5171         return ret;
5172 }
5173 EXPORT_SYMBOL(il_mac_config);
5174
5175 void
5176 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5177 {
5178         struct il_priv *il = hw->priv;
5179         unsigned long flags;
5180
5181         mutex_lock(&il->mutex);
5182         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5183
5184         spin_lock_irqsave(&il->lock, flags);
5185
5186         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5187
5188         /* new association get rid of ibss beacon skb */
5189         if (il->beacon_skb)
5190                 dev_kfree_skb(il->beacon_skb);
5191         il->beacon_skb = NULL;
5192         il->timestamp = 0;
5193
5194         spin_unlock_irqrestore(&il->lock, flags);
5195
5196         il_scan_cancel_timeout(il, 100);
5197         if (!il_is_ready_rf(il)) {
5198                 D_MAC80211("leave - not ready\n");
5199                 mutex_unlock(&il->mutex);
5200                 return;
5201         }
5202
5203         /* we are restarting association process */
5204         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5205         il_commit_rxon(il);
5206
5207         il_set_rate(il);
5208
5209         D_MAC80211("leave\n");
5210         mutex_unlock(&il->mutex);
5211 }
5212 EXPORT_SYMBOL(il_mac_reset_tsf);
5213
5214 static void
5215 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5216 {
5217         struct il_ht_config *ht_conf = &il->current_ht_config;
5218         struct ieee80211_sta *sta;
5219         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5220
5221         D_ASSOC("enter:\n");
5222
5223         if (!il->ht.enabled)
5224                 return;
5225
5226         il->ht.protection =
5227             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5228         il->ht.non_gf_sta_present =
5229             !!(bss_conf->
5230                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5231
5232         ht_conf->single_chain_sufficient = false;
5233
5234         switch (vif->type) {
5235         case NL80211_IFTYPE_STATION:
5236                 rcu_read_lock();
5237                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5238                 if (sta) {
5239                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5240                         int maxstreams;
5241
5242                         maxstreams =
5243                             (ht_cap->mcs.
5244                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5245                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5246                         maxstreams += 1;
5247
5248                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5249                             ht_cap->mcs.rx_mask[2] == 0)
5250                                 ht_conf->single_chain_sufficient = true;
5251                         if (maxstreams <= 1)
5252                                 ht_conf->single_chain_sufficient = true;
5253                 } else {
5254                         /*
5255                          * If at all, this can only happen through a race
5256                          * when the AP disconnects us while we're still
5257                          * setting up the connection, in that case mac80211
5258                          * will soon tell us about that.
5259                          */
5260                         ht_conf->single_chain_sufficient = true;
5261                 }
5262                 rcu_read_unlock();
5263                 break;
5264         case NL80211_IFTYPE_ADHOC:
5265                 ht_conf->single_chain_sufficient = true;
5266                 break;
5267         default:
5268                 break;
5269         }
5270
5271         D_ASSOC("leave\n");
5272 }
5273
5274 static inline void
5275 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5276 {
5277         /*
5278          * inform the ucode that there is no longer an
5279          * association and that no more packets should be
5280          * sent
5281          */
5282         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5283         il->staging.assoc_id = 0;
5284         il_commit_rxon(il);
5285 }
5286
5287 static void
5288 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5289 {
5290         struct il_priv *il = hw->priv;
5291         unsigned long flags;
5292         __le64 timestamp;
5293         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5294
5295         if (!skb)
5296                 return;
5297
5298         D_MAC80211("enter\n");
5299
5300         lockdep_assert_held(&il->mutex);
5301
5302         if (!il->beacon_enabled) {
5303                 IL_ERR("update beacon with no beaconing enabled\n");
5304                 dev_kfree_skb(skb);
5305                 return;
5306         }
5307
5308         spin_lock_irqsave(&il->lock, flags);
5309
5310         if (il->beacon_skb)
5311                 dev_kfree_skb(il->beacon_skb);
5312
5313         il->beacon_skb = skb;
5314
5315         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5316         il->timestamp = le64_to_cpu(timestamp);
5317
5318         D_MAC80211("leave\n");
5319         spin_unlock_irqrestore(&il->lock, flags);
5320
5321         if (!il_is_ready_rf(il)) {
5322                 D_MAC80211("leave - RF not ready\n");
5323                 return;
5324         }
5325
5326         il->ops->post_associate(il);
5327 }
5328
5329 void
5330 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5331                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5332 {
5333         struct il_priv *il = hw->priv;
5334         int ret;
5335
5336         mutex_lock(&il->mutex);
5337         D_MAC80211("enter: changes 0x%x\n", changes);
5338
5339         if (!il_is_alive(il)) {
5340                 D_MAC80211("leave - not alive\n");
5341                 mutex_unlock(&il->mutex);
5342                 return;
5343         }
5344
5345         if (changes & BSS_CHANGED_QOS) {
5346                 unsigned long flags;
5347
5348                 spin_lock_irqsave(&il->lock, flags);
5349                 il->qos_data.qos_active = bss_conf->qos;
5350                 il_update_qos(il);
5351                 spin_unlock_irqrestore(&il->lock, flags);
5352         }
5353
5354         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5355                 /* FIXME: can we remove beacon_enabled ? */
5356                 if (vif->bss_conf.enable_beacon)
5357                         il->beacon_enabled = true;
5358                 else
5359                         il->beacon_enabled = false;
5360         }
5361
5362         if (changes & BSS_CHANGED_BSSID) {
5363                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5364
5365                 /*
5366                  * On passive channel we wait with blocked queues to see if
5367                  * there is traffic on that channel. If no frame will be
5368                  * received (what is very unlikely since scan detects AP on
5369                  * that channel, but theoretically possible), mac80211 associate
5370                  * procedure will time out and mac80211 will call us with NULL
5371                  * bssid. We have to unblock queues on such condition.
5372                  */
5373                 if (is_zero_ether_addr(bss_conf->bssid))
5374                         il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5375
5376                 /*
5377                  * If there is currently a HW scan going on in the background,
5378                  * then we need to cancel it, otherwise sometimes we are not
5379                  * able to authenticate (FIXME: why ?)
5380                  */
5381                 if (il_scan_cancel_timeout(il, 100)) {
5382                         D_MAC80211("leave - scan abort failed\n");
5383                         mutex_unlock(&il->mutex);
5384                         return;
5385                 }
5386
5387                 /* mac80211 only sets assoc when in STATION mode */
5388                 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5389
5390                 /* FIXME: currently needed in a few places */
5391                 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5392         }
5393
5394         /*
5395          * This needs to be after setting the BSSID in case
5396          * mac80211 decides to do both changes at once because
5397          * it will invoke post_associate.
5398          */
5399         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5400                 il_beacon_update(hw, vif);
5401
5402         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5403                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5404                 if (bss_conf->use_short_preamble)
5405                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5406                 else
5407                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5408         }
5409
5410         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5411                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5412                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5413                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5414                 else
5415                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5416                 if (bss_conf->use_cts_prot)
5417                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5418                 else
5419                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5420         }
5421
5422         if (changes & BSS_CHANGED_BASIC_RATES) {
5423                 /* XXX use this information
5424                  *
5425                  * To do that, remove code from il_set_rate() and put something
5426                  * like this here:
5427                  *
5428                  if (A-band)
5429                  il->staging.ofdm_basic_rates =
5430                  bss_conf->basic_rates;
5431                  else
5432                  il->staging.ofdm_basic_rates =
5433                  bss_conf->basic_rates >> 4;
5434                  il->staging.cck_basic_rates =
5435                  bss_conf->basic_rates & 0xF;
5436                  */
5437         }
5438
5439         if (changes & BSS_CHANGED_HT) {
5440                 il_ht_conf(il, vif);
5441
5442                 if (il->ops->set_rxon_chain)
5443                         il->ops->set_rxon_chain(il);
5444         }
5445
5446         if (changes & BSS_CHANGED_ASSOC) {
5447                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5448                 if (bss_conf->assoc) {
5449                         il->timestamp = bss_conf->sync_tsf;
5450
5451                         if (!il_is_rfkill(il))
5452                                 il->ops->post_associate(il);
5453                 } else
5454                         il_set_no_assoc(il, vif);
5455         }
5456
5457         if (changes && il_is_associated(il) && bss_conf->aid) {
5458                 D_MAC80211("Changes (%#x) while associated\n", changes);
5459                 ret = il_send_rxon_assoc(il);
5460                 if (!ret) {
5461                         /* Sync active_rxon with latest change. */
5462                         memcpy((void *)&il->active, &il->staging,
5463                                sizeof(struct il_rxon_cmd));
5464                 }
5465         }
5466
5467         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5468                 if (vif->bss_conf.enable_beacon) {
5469                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5470                                ETH_ALEN);
5471                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5472                         il->ops->config_ap(il);
5473                 } else
5474                         il_set_no_assoc(il, vif);
5475         }
5476
5477         if (changes & BSS_CHANGED_IBSS) {
5478                 ret = il->ops->manage_ibss_station(il, vif,
5479                                                    bss_conf->ibss_joined);
5480                 if (ret)
5481                         IL_ERR("failed to %s IBSS station %pM\n",
5482                                bss_conf->ibss_joined ? "add" : "remove",
5483                                bss_conf->bssid);
5484         }
5485
5486         D_MAC80211("leave\n");
5487         mutex_unlock(&il->mutex);
5488 }
5489 EXPORT_SYMBOL(il_mac_bss_info_changed);
5490
5491 irqreturn_t
5492 il_isr(int irq, void *data)
5493 {
5494         struct il_priv *il = data;
5495         u32 inta, inta_mask;
5496         u32 inta_fh;
5497         unsigned long flags;
5498         if (!il)
5499                 return IRQ_NONE;
5500
5501         spin_lock_irqsave(&il->lock, flags);
5502
5503         /* Disable (but don't clear!) interrupts here to avoid
5504          *    back-to-back ISRs and sporadic interrupts from our NIC.
5505          * If we have something to service, the tasklet will re-enable ints.
5506          * If we *don't* have something, we'll re-enable before leaving here. */
5507         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5508         _il_wr(il, CSR_INT_MASK, 0x00000000);
5509
5510         /* Discover which interrupts are active/pending */
5511         inta = _il_rd(il, CSR_INT);
5512         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5513
5514         /* Ignore interrupt if there's nothing in NIC to service.
5515          * This may be due to IRQ shared with another device,
5516          * or due to sporadic interrupts thrown from our NIC. */
5517         if (!inta && !inta_fh) {
5518                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5519                 goto none;
5520         }
5521
5522         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5523                 /* Hardware disappeared. It might have already raised
5524                  * an interrupt */
5525                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5526                 goto unplugged;
5527         }
5528
5529         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5530               inta_fh);
5531
5532         inta &= ~CSR_INT_BIT_SCD;
5533
5534         /* il_irq_tasklet() will service interrupts and re-enable them */
5535         if (likely(inta || inta_fh))
5536                 tasklet_schedule(&il->irq_tasklet);
5537
5538 unplugged:
5539         spin_unlock_irqrestore(&il->lock, flags);
5540         return IRQ_HANDLED;
5541
5542 none:
5543         /* re-enable interrupts here since we don't have anything to service. */
5544         /* only Re-enable if disabled by irq */
5545         if (test_bit(S_INT_ENABLED, &il->status))
5546                 il_enable_interrupts(il);
5547         spin_unlock_irqrestore(&il->lock, flags);
5548         return IRQ_NONE;
5549 }
5550 EXPORT_SYMBOL(il_isr);
5551
5552 /*
5553  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5554  *  function.
5555  */
5556 void
5557 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5558                      __le16 fc, __le32 *tx_flags)
5559 {
5560         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5561                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5562                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5563                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5564
5565                 if (!ieee80211_is_mgmt(fc))
5566                         return;
5567
5568                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5569                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5570                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5571                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5572                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5573                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5574                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5575                         break;
5576                 }
5577         } else if (info->control.rates[0].
5578                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5579                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5580                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5581                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5582         }
5583 }
5584 EXPORT_SYMBOL(il_tx_cmd_protection);