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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/types.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/pci.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/delay.h>
  39 #include <linux/skbuff.h>
  40 #include <net/mac80211.h>
  41
  42 #include "common.h"
  43
  44 int
  45 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
  46 {
  47         const int interval = 10; /* microseconds */
  48         int t = 0;
  49
  50         do {
  51                 if ((_il_rd(il, addr) & mask) == (bits & mask))
  52                         return t;
  53                 udelay(interval);
  54                 t += interval;
  55         } while (t < timeout);
  56
  57         return -ETIMEDOUT;
  58 }
  59 EXPORT_SYMBOL(_il_poll_bit);
  60
  61 void
  62 il_set_bit(struct il_priv *p, u32 r, u32 m)
  63 {
  64         unsigned long reg_flags;
  65
  66         spin_lock_irqsave(&p->reg_lock, reg_flags);
  67         _il_set_bit(p, r, m);
  68         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  69 }
  70 EXPORT_SYMBOL(il_set_bit);
  71
  72 void
  73 il_clear_bit(struct il_priv *p, u32 r, u32 m)
  74 {
  75         unsigned long reg_flags;
  76
  77         spin_lock_irqsave(&p->reg_lock, reg_flags);
  78         _il_clear_bit(p, r, m);
  79         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  80 }
  81 EXPORT_SYMBOL(il_clear_bit);
  82
  83 bool
  84 _il_grab_nic_access(struct il_priv *il)
  85 {
  86         int ret;
  87         u32 val;
  88
  89         /* this bit wakes up the NIC */
  90         _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
  91
  92         /*
  93          * These bits say the device is running, and should keep running for
  94          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
  95          * but they do not indicate that embedded SRAM is restored yet;
  96          * 3945 and 4965 have volatile SRAM, and must save/restore contents
  97          * to/from host DRAM when sleeping/waking for power-saving.
  98          * Each direction takes approximately 1/4 millisecond; with this
  99          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
 100          * series of register accesses are expected (e.g. reading Event Log),
 101          * to keep device from sleeping.
 102          *
 103          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
 104          * SRAM is okay/restored.  We don't check that here because this call
 105          * is just for hardware register access; but GP1 MAC_SLEEP check is a
 106          * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
 107          *
 108          */
 109         ret =
 110             _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 111                          (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 112                           CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
 113         if (unlikely(ret < 0)) {
 114                 val = _il_rd(il, CSR_GP_CNTRL);
 115                 WARN_ONCE(1, "Timeout waiting for ucode processor access "
 116                              "(CSR_GP_CNTRL 0x%08x)\n", val);
 117                 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 118                 return false;
 119         }
 120
 121         return true;
 122 }
 123 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
 124
 125 int
 126 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
 127 {
 128         const int interval = 10; /* microseconds */
 129         int t = 0;
 130
 131         do {
 132                 if ((il_rd(il, addr) & mask) == mask)
 133                         return t;
 134                 udelay(interval);
 135                 t += interval;
 136         } while (t < timeout);
 137
 138         return -ETIMEDOUT;
 139 }
 140 EXPORT_SYMBOL(il_poll_bit);
 141
 142 u32
 143 il_rd_prph(struct il_priv *il, u32 reg)
 144 {
 145         unsigned long reg_flags;
 146         u32 val;
 147
 148         spin_lock_irqsave(&il->reg_lock, reg_flags);
 149         _il_grab_nic_access(il);
 150         val = _il_rd_prph(il, reg);
 151         _il_release_nic_access(il);
 152         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 153         return val;
 154 }
 155 EXPORT_SYMBOL(il_rd_prph);
 156
 157 void
 158 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
 159 {
 160         unsigned long reg_flags;
 161
 162         spin_lock_irqsave(&il->reg_lock, reg_flags);
 163         if (likely(_il_grab_nic_access(il))) {
 164                 _il_wr_prph(il, addr, val);
 165                 _il_release_nic_access(il);
 166         }
 167         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 168 }
 169 EXPORT_SYMBOL(il_wr_prph);
 170
 171 u32
 172 il_read_targ_mem(struct il_priv *il, u32 addr)
 173 {
 174         unsigned long reg_flags;
 175         u32 value;
 176
 177         spin_lock_irqsave(&il->reg_lock, reg_flags);
 178         _il_grab_nic_access(il);
 179
 180         _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
 181         value = _il_rd(il, HBUS_TARG_MEM_RDAT);
 182
 183         _il_release_nic_access(il);
 184         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 185         return value;
 186 }
 187 EXPORT_SYMBOL(il_read_targ_mem);
 188
 189 void
 190 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
 191 {
 192         unsigned long reg_flags;
 193
 194         spin_lock_irqsave(&il->reg_lock, reg_flags);
 195         if (likely(_il_grab_nic_access(il))) {
 196                 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
 197                 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
 198                 _il_release_nic_access(il);
 199         }
 200         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 201 }
 202 EXPORT_SYMBOL(il_write_targ_mem);
 203
 204 const char *
 205 il_get_cmd_string(u8 cmd)
 206 {
 207         switch (cmd) {
 208                 IL_CMD(N_ALIVE);
 209                 IL_CMD(N_ERROR);
 210                 IL_CMD(C_RXON);
 211                 IL_CMD(C_RXON_ASSOC);
 212                 IL_CMD(C_QOS_PARAM);
 213                 IL_CMD(C_RXON_TIMING);
 214                 IL_CMD(C_ADD_STA);
 215                 IL_CMD(C_REM_STA);
 216                 IL_CMD(C_WEPKEY);
 217                 IL_CMD(N_3945_RX);
 218                 IL_CMD(C_TX);
 219                 IL_CMD(C_RATE_SCALE);
 220                 IL_CMD(C_LEDS);
 221                 IL_CMD(C_TX_LINK_QUALITY_CMD);
 222                 IL_CMD(C_CHANNEL_SWITCH);
 223                 IL_CMD(N_CHANNEL_SWITCH);
 224                 IL_CMD(C_SPECTRUM_MEASUREMENT);
 225                 IL_CMD(N_SPECTRUM_MEASUREMENT);
 226                 IL_CMD(C_POWER_TBL);
 227                 IL_CMD(N_PM_SLEEP);
 228                 IL_CMD(N_PM_DEBUG_STATS);
 229                 IL_CMD(C_SCAN);
 230                 IL_CMD(C_SCAN_ABORT);
 231                 IL_CMD(N_SCAN_START);
 232                 IL_CMD(N_SCAN_RESULTS);
 233                 IL_CMD(N_SCAN_COMPLETE);
 234                 IL_CMD(N_BEACON);
 235                 IL_CMD(C_TX_BEACON);
 236                 IL_CMD(C_TX_PWR_TBL);
 237                 IL_CMD(C_BT_CONFIG);
 238                 IL_CMD(C_STATS);
 239                 IL_CMD(N_STATS);
 240                 IL_CMD(N_CARD_STATE);
 241                 IL_CMD(N_MISSED_BEACONS);
 242                 IL_CMD(C_CT_KILL_CONFIG);
 243                 IL_CMD(C_SENSITIVITY);
 244                 IL_CMD(C_PHY_CALIBRATION);
 245                 IL_CMD(N_RX_PHY);
 246                 IL_CMD(N_RX_MPDU);
 247                 IL_CMD(N_RX);
 248                 IL_CMD(N_COMPRESSED_BA);
 249         default:
 250                 return "UNKNOWN";
 251
 252         }
 253 }
 254 EXPORT_SYMBOL(il_get_cmd_string);
 255
 256 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 257
 258 static void
 259 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
 260                         struct il_rx_pkt *pkt)
 261 {
 262         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 263                 IL_ERR("Bad return from %s (0x%08X)\n",
 264                        il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 265                 return;
 266         }
 267 #ifdef CONFIG_IWLEGACY_DEBUG
 268         switch (cmd->hdr.cmd) {
 269         case C_TX_LINK_QUALITY_CMD:
 270         case C_SENSITIVITY:
 271                 D_HC_DUMP("back from %s (0x%08X)\n",
 272                           il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 273                 break;
 274         default:
 275                 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
 276                      pkt->hdr.flags);
 277         }
 278 #endif
 279 }
 280
 281 static int
 282 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 283 {
 284         int ret;
 285
 286         BUG_ON(!(cmd->flags & CMD_ASYNC));
 287
 288         /* An asynchronous command can not expect an SKB to be set. */
 289         BUG_ON(cmd->flags & CMD_WANT_SKB);
 290
 291         /* Assign a generic callback if one is not provided */
 292         if (!cmd->callback)
 293                 cmd->callback = il_generic_cmd_callback;
 294
 295         if (test_bit(S_EXIT_PENDING, &il->status))
 296                 return -EBUSY;
 297
 298         ret = il_enqueue_hcmd(il, cmd);
 299         if (ret < 0) {
 300                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 301                        il_get_cmd_string(cmd->id), ret);
 302                 return ret;
 303         }
 304         return 0;
 305 }
 306
 307 int
 308 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 309 {
 310         int cmd_idx;
 311         int ret;
 312
 313         lockdep_assert_held(&il->mutex);
 314
 315         BUG_ON(cmd->flags & CMD_ASYNC);
 316
 317         /* A synchronous command can not have a callback set. */
 318         BUG_ON(cmd->callback);
 319
 320         D_INFO("Attempting to send sync command %s\n",
 321                il_get_cmd_string(cmd->id));
 322
 323         set_bit(S_HCMD_ACTIVE, &il->status);
 324         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 325                il_get_cmd_string(cmd->id));
 326
 327         cmd_idx = il_enqueue_hcmd(il, cmd);
 328         if (cmd_idx < 0) {
 329                 ret = cmd_idx;
 330                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 331                        il_get_cmd_string(cmd->id), ret);
 332                 goto out;
 333         }
 334
 335         ret = wait_event_timeout(il->wait_command_queue,
 336                                  !test_bit(S_HCMD_ACTIVE, &il->status),
 337                                  HOST_COMPLETE_TIMEOUT);
 338         if (!ret) {
 339                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 340                         IL_ERR("Error sending %s: time out after %dms.\n",
 341                                il_get_cmd_string(cmd->id),
 342                                jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 343
 344                         clear_bit(S_HCMD_ACTIVE, &il->status);
 345                         D_INFO("Clearing HCMD_ACTIVE for command %s\n",
 346                                il_get_cmd_string(cmd->id));
 347                         ret = -ETIMEDOUT;
 348                         goto cancel;
 349                 }
 350         }
 351
 352         if (test_bit(S_RFKILL, &il->status)) {
 353                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 354                        il_get_cmd_string(cmd->id));
 355                 ret = -ECANCELED;
 356                 goto fail;
 357         }
 358         if (test_bit(S_FW_ERROR, &il->status)) {
 359                 IL_ERR("Command %s failed: FW Error\n",
 360                        il_get_cmd_string(cmd->id));
 361                 ret = -EIO;
 362                 goto fail;
 363         }
 364         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 365                 IL_ERR("Error: Response NULL in '%s'\n",
 366                        il_get_cmd_string(cmd->id));
 367                 ret = -EIO;
 368                 goto cancel;
 369         }
 370
 371         ret = 0;
 372         goto out;
 373
 374 cancel:
 375         if (cmd->flags & CMD_WANT_SKB) {
 376                 /*
 377                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 378                  * TX cmd queue. Otherwise in case the cmd comes
 379                  * in later, it will possibly set an invalid
 380                  * address (cmd->meta.source).
 381                  */
 382                 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
 383         }
 384 fail:
 385         if (cmd->reply_page) {
 386                 il_free_pages(il, cmd->reply_page);
 387                 cmd->reply_page = 0;
 388         }
 389 out:
 390         return ret;
 391 }
 392 EXPORT_SYMBOL(il_send_cmd_sync);
 393
 394 int
 395 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 396 {
 397         if (cmd->flags & CMD_ASYNC)
 398                 return il_send_cmd_async(il, cmd);
 399
 400         return il_send_cmd_sync(il, cmd);
 401 }
 402 EXPORT_SYMBOL(il_send_cmd);
 403
 404 int
 405 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 406 {
 407         struct il_host_cmd cmd = {
 408                 .id = id,
 409                 .len = len,
 410                 .data = data,
 411         };
 412
 413         return il_send_cmd_sync(il, &cmd);
 414 }
 415 EXPORT_SYMBOL(il_send_cmd_pdu);
 416
 417 int
 418 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
 419                       void (*callback) (struct il_priv *il,
 420                                         struct il_device_cmd *cmd,
 421                                         struct il_rx_pkt *pkt))
 422 {
 423         struct il_host_cmd cmd = {
 424                 .id = id,
 425                 .len = len,
 426                 .data = data,
 427         };
 428
 429         cmd.flags |= CMD_ASYNC;
 430         cmd.callback = callback;
 431
 432         return il_send_cmd_async(il, &cmd);
 433 }
 434 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 435
 436 /* default: IL_LED_BLINK(0) using blinking idx table */
 437 static int led_mode;
 438 module_param(led_mode, int, S_IRUGO);
 439 MODULE_PARM_DESC(led_mode,
 440                  "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
 441
 442 /* Throughput           OFF time(ms)    ON time (ms)
 443  *      >300                    25              25
 444  *      >200 to 300             40              40
 445  *      >100 to 200             55              55
 446  *      >70 to 100              65              65
 447  *      >50 to 70               75              75
 448  *      >20 to 50               85              85
 449  *      >10 to 20               95              95
 450  *      >5 to 10                110             110
 451  *      >1 to 5                 130             130
 452  *      >0 to 1                 167             167
 453  *      <=0                                     SOLID ON
 454  */
 455 static const struct ieee80211_tpt_blink il_blink[] = {
 456         {.throughput = 0,               .blink_time = 334},
 457         {.throughput = 1 * 1024 - 1,    .blink_time = 260},
 458         {.throughput = 5 * 1024 - 1,    .blink_time = 220},
 459         {.throughput = 10 * 1024 - 1,   .blink_time = 190},
 460         {.throughput = 20 * 1024 - 1,   .blink_time = 170},
 461         {.throughput = 50 * 1024 - 1,   .blink_time = 150},
 462         {.throughput = 70 * 1024 - 1,   .blink_time = 130},
 463         {.throughput = 100 * 1024 - 1,  .blink_time = 110},
 464         {.throughput = 200 * 1024 - 1,  .blink_time = 80},
 465         {.throughput = 300 * 1024 - 1,  .blink_time = 50},
 466 };
 467
 468 /*
 469  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 470  * Led blink rate analysis showed an average deviation of 0% on 3945,
 471  * 5% on 4965 HW.
 472  * Need to compensate on the led on/off time per HW according to the deviation
 473  * to achieve the desired led frequency
 474  * The calculation is: (100-averageDeviation)/100 * blinkTime
 475  * For code efficiency the calculation will be:
 476  *     compensation = (100 - averageDeviation) * 64 / 100
 477  *     NewBlinkTime = (compensation * BlinkTime) / 64
 478  */
 479 static inline u8
 480 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
 481 {
 482         if (!compensation) {
 483                 IL_ERR("undefined blink compensation: "
 484                        "use pre-defined blinking time\n");
 485                 return time;
 486         }
 487
 488         return (u8) ((time * compensation) >> 6);
 489 }
 490
 491 /* Set led pattern command */
 492 static int
 493 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
 494 {
 495         struct il_led_cmd led_cmd = {
 496                 .id = IL_LED_LINK,
 497                 .interval = IL_DEF_LED_INTRVL
 498         };
 499         int ret;
 500
 501         if (!test_bit(S_READY, &il->status))
 502                 return -EBUSY;
 503
 504         if (il->blink_on == on && il->blink_off == off)
 505                 return 0;
 506
 507         if (off == 0) {
 508                 /* led is SOLID_ON */
 509                 on = IL_LED_SOLID;
 510         }
 511
 512         D_LED("Led blink time compensation=%u\n",
 513               il->cfg->led_compensation);
 514         led_cmd.on =
 515             il_blink_compensation(il, on,
 516                                   il->cfg->led_compensation);
 517         led_cmd.off =
 518             il_blink_compensation(il, off,
 519                                   il->cfg->led_compensation);
 520
 521         ret = il->ops->send_led_cmd(il, &led_cmd);
 522         if (!ret) {
 523                 il->blink_on = on;
 524                 il->blink_off = off;
 525         }
 526         return ret;
 527 }
 528
 529 static void
 530 il_led_brightness_set(struct led_classdev *led_cdev,
 531                       enum led_brightness brightness)
 532 {
 533         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 534         unsigned long on = 0;
 535
 536         if (brightness > 0)
 537                 on = IL_LED_SOLID;
 538
 539         il_led_cmd(il, on, 0);
 540 }
 541
 542 static int
 543 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 544                  unsigned long *delay_off)
 545 {
 546         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 547
 548         return il_led_cmd(il, *delay_on, *delay_off);
 549 }
 550
 551 void
 552 il_leds_init(struct il_priv *il)
 553 {
 554         int mode = led_mode;
 555         int ret;
 556
 557         if (mode == IL_LED_DEFAULT)
 558                 mode = il->cfg->led_mode;
 559
 560         il->led.name =
 561             kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
 562         il->led.brightness_set = il_led_brightness_set;
 563         il->led.blink_set = il_led_blink_set;
 564         il->led.max_brightness = 1;
 565
 566         switch (mode) {
 567         case IL_LED_DEFAULT:
 568                 WARN_ON(1);
 569                 break;
 570         case IL_LED_BLINK:
 571                 il->led.default_trigger =
 572                     ieee80211_create_tpt_led_trigger(il->hw,
 573                                                      IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 574                                                      il_blink,
 575                                                      ARRAY_SIZE(il_blink));
 576                 break;
 577         case IL_LED_RF_STATE:
 578                 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
 579                 break;
 580         }
 581
 582         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 583         if (ret) {
 584                 kfree(il->led.name);
 585                 return;
 586         }
 587
 588         il->led_registered = true;
 589 }
 590 EXPORT_SYMBOL(il_leds_init);
 591
 592 void
 593 il_leds_exit(struct il_priv *il)
 594 {
 595         if (!il->led_registered)
 596                 return;
 597
 598         led_classdev_unregister(&il->led);
 599         kfree(il->led.name);
 600 }
 601 EXPORT_SYMBOL(il_leds_exit);
 602
 603 /************************** EEPROM BANDS ****************************
 604  *
 605  * The il_eeprom_band definitions below provide the mapping from the
 606  * EEPROM contents to the specific channel number supported for each
 607  * band.
 608  *
 609  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 610  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 611  * The specific geography and calibration information for that channel
 612  * is contained in the eeprom map itself.
 613  *
 614  * During init, we copy the eeprom information and channel map
 615  * information into il->channel_info_24/52 and il->channel_map_24/52
 616  *
 617  * channel_map_24/52 provides the idx in the channel_info array for a
 618  * given channel.  We have to have two separate maps as there is channel
 619  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 620  * band_2
 621  *
 622  * A value of 0xff stored in the channel_map indicates that the channel
 623  * is not supported by the hardware at all.
 624  *
 625  * A value of 0xfe in the channel_map indicates that the channel is not
 626  * valid for Tx with the current hardware.  This means that
 627  * while the system can tune and receive on a given channel, it may not
 628  * be able to associate or transmit any frames on that
 629  * channel.  There is no corresponding channel information for that
 630  * entry.
 631  *
 632  *********************************************************************/
 633
 634 /* 2.4 GHz */
 635 const u8 il_eeprom_band_1[14] = {
 636         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 637 };
 638
 639 /* 5.2 GHz bands */
 640 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 641         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 642 };
 643
 644 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 645         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 646 };
 647
 648 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 649         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 650 };
 651
 652 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 653         145, 149, 153, 157, 161, 165
 654 };
 655
 656 static const u8 il_eeprom_band_6[] = {  /* 2.4 ht40 channel */
 657         1, 2, 3, 4, 5, 6, 7
 658 };
 659
 660 static const u8 il_eeprom_band_7[] = {  /* 5.2 ht40 channel */
 661         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 662 };
 663
 664 /******************************************************************************
 665  *
 666  * EEPROM related functions
 667  *
 668 ******************************************************************************/
 669
 670 static int
 671 il_eeprom_verify_signature(struct il_priv *il)
 672 {
 673         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 674         int ret = 0;
 675
 676         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 677         switch (gp) {
 678         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 679         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 680                 break;
 681         default:
 682                 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
 683                 ret = -ENOENT;
 684                 break;
 685         }
 686         return ret;
 687 }
 688
 689 const u8 *
 690 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 691 {
 692         BUG_ON(offset >= il->cfg->eeprom_size);
 693         return &il->eeprom[offset];
 694 }
 695 EXPORT_SYMBOL(il_eeprom_query_addr);
 696
 697 u16
 698 il_eeprom_query16(const struct il_priv *il, size_t offset)
 699 {
 700         if (!il->eeprom)
 701                 return 0;
 702         return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
 703 }
 704 EXPORT_SYMBOL(il_eeprom_query16);
 705
 706 /**
 707  * il_eeprom_init - read EEPROM contents
 708  *
 709  * Load the EEPROM contents from adapter into il->eeprom
 710  *
 711  * NOTE:  This routine uses the non-debug IO access functions.
 712  */
 713 int
 714 il_eeprom_init(struct il_priv *il)
 715 {
 716         __le16 *e;
 717         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 718         int sz;
 719         int ret;
 720         u16 addr;
 721
 722         /* allocate eeprom */
 723         sz = il->cfg->eeprom_size;
 724         D_EEPROM("NVM size = %d\n", sz);
 725         il->eeprom = kzalloc(sz, GFP_KERNEL);
 726         if (!il->eeprom)
 727                 return -ENOMEM;
 728
 729         e = (__le16 *) il->eeprom;
 730
 731         il->ops->apm_init(il);
 732
 733         ret = il_eeprom_verify_signature(il);
 734         if (ret < 0) {
 735                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 736                 ret = -ENOENT;
 737                 goto err;
 738         }
 739
 740         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 741         ret = il->ops->eeprom_acquire_semaphore(il);
 742         if (ret < 0) {
 743                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 744                 ret = -ENOENT;
 745                 goto err;
 746         }
 747
 748         /* eeprom is an array of 16bit values */
 749         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 750                 u32 r;
 751
 752                 _il_wr(il, CSR_EEPROM_REG,
 753                        CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 754
 755                 ret =
 756                     _il_poll_bit(il, CSR_EEPROM_REG,
 757                                  CSR_EEPROM_REG_READ_VALID_MSK,
 758                                  CSR_EEPROM_REG_READ_VALID_MSK,
 759                                  IL_EEPROM_ACCESS_TIMEOUT);
 760                 if (ret < 0) {
 761                         IL_ERR("Time out reading EEPROM[%d]\n", addr);
 762                         goto done;
 763                 }
 764                 r = _il_rd(il, CSR_EEPROM_REG);
 765                 e[addr / 2] = cpu_to_le16(r >> 16);
 766         }
 767
 768         D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 769                  il_eeprom_query16(il, EEPROM_VERSION));
 770
 771         ret = 0;
 772 done:
 773         il->ops->eeprom_release_semaphore(il);
 774
 775 err:
 776         if (ret)
 777                 il_eeprom_free(il);
 778         /* Reset chip to save power until we load uCode during "up". */
 779         il_apm_stop(il);
 780         return ret;
 781 }
 782 EXPORT_SYMBOL(il_eeprom_init);
 783
 784 void
 785 il_eeprom_free(struct il_priv *il)
 786 {
 787         kfree(il->eeprom);
 788         il->eeprom = NULL;
 789 }
 790 EXPORT_SYMBOL(il_eeprom_free);
 791
 792 static void
 793 il_init_band_reference(const struct il_priv *il, int eep_band,
 794                        int *eeprom_ch_count,
 795                        const struct il_eeprom_channel **eeprom_ch_info,
 796                        const u8 **eeprom_ch_idx)
 797 {
 798         u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 799
 800         switch (eep_band) {
 801         case 1:         /* 2.4GHz band */
 802                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 803                 *eeprom_ch_info =
 804                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 805                                                                      offset);
 806                 *eeprom_ch_idx = il_eeprom_band_1;
 807                 break;
 808         case 2:         /* 4.9GHz band */
 809                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 810                 *eeprom_ch_info =
 811                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 812                                                                      offset);
 813                 *eeprom_ch_idx = il_eeprom_band_2;
 814                 break;
 815         case 3:         /* 5.2GHz band */
 816                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 817                 *eeprom_ch_info =
 818                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 819                                                                      offset);
 820                 *eeprom_ch_idx = il_eeprom_band_3;
 821                 break;
 822         case 4:         /* 5.5GHz band */
 823                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 824                 *eeprom_ch_info =
 825                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 826                                                                      offset);
 827                 *eeprom_ch_idx = il_eeprom_band_4;
 828                 break;
 829         case 5:         /* 5.7GHz band */
 830                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 831                 *eeprom_ch_info =
 832                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 833                                                                      offset);
 834                 *eeprom_ch_idx = il_eeprom_band_5;
 835                 break;
 836         case 6:         /* 2.4GHz ht40 channels */
 837                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 838                 *eeprom_ch_info =
 839                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 840                                                                      offset);
 841                 *eeprom_ch_idx = il_eeprom_band_6;
 842                 break;
 843         case 7:         /* 5 GHz ht40 channels */
 844                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 845                 *eeprom_ch_info =
 846                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 847                                                                      offset);
 848                 *eeprom_ch_idx = il_eeprom_band_7;
 849                 break;
 850         default:
 851                 BUG();
 852         }
 853 }
 854
 855 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 856                             ? # x " " : "")
 857 /**
 858  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 859  *
 860  * Does not set up a command, or touch hardware.
 861  */
 862 static int
 863 il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
 864                       const struct il_eeprom_channel *eeprom_ch,
 865                       u8 clear_ht40_extension_channel)
 866 {
 867         struct il_channel_info *ch_info;
 868
 869         ch_info =
 870             (struct il_channel_info *)il_get_channel_info(il, band, channel);
 871
 872         if (!il_is_channel_valid(ch_info))
 873                 return -1;
 874
 875         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 876                  " Ad-Hoc %ssupported\n", ch_info->channel,
 877                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 878                  CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 879                  CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 880                  CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 881                  eeprom_ch->max_power_avg,
 882                  ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 883                   !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 884
 885         ch_info->ht40_eeprom = *eeprom_ch;
 886         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 887         ch_info->ht40_flags = eeprom_ch->flags;
 888         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 889                 ch_info->ht40_extension_channel &=
 890                     ~clear_ht40_extension_channel;
 891
 892         return 0;
 893 }
 894
 895 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 896                             ? # x " " : "")
 897
 898 /**
 899  * il_init_channel_map - Set up driver's info for all possible channels
 900  */
 901 int
 902 il_init_channel_map(struct il_priv *il)
 903 {
 904         int eeprom_ch_count = 0;
 905         const u8 *eeprom_ch_idx = NULL;
 906         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 907         int band, ch;
 908         struct il_channel_info *ch_info;
 909
 910         if (il->channel_count) {
 911                 D_EEPROM("Channel map already initialized.\n");
 912                 return 0;
 913         }
 914
 915         D_EEPROM("Initializing regulatory info from EEPROM\n");
 916
 917         il->channel_count =
 918             ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 919             ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 920             ARRAY_SIZE(il_eeprom_band_5);
 921
 922         D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 923
 924         il->channel_info =
 925             kzalloc(sizeof(struct il_channel_info) * il->channel_count,
 926                     GFP_KERNEL);
 927         if (!il->channel_info) {
 928                 IL_ERR("Could not allocate channel_info\n");
 929                 il->channel_count = 0;
 930                 return -ENOMEM;
 931         }
 932
 933         ch_info = il->channel_info;
 934
 935         /* Loop through the 5 EEPROM bands adding them in order to the
 936          * channel map we maintain (that contains additional information than
 937          * what just in the EEPROM) */
 938         for (band = 1; band <= 5; band++) {
 939
 940                 il_init_band_reference(il, band, &eeprom_ch_count,
 941                                        &eeprom_ch_info, &eeprom_ch_idx);
 942
 943                 /* Loop through each band adding each of the channels */
 944                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 945                         ch_info->channel = eeprom_ch_idx[ch];
 946                         ch_info->band =
 947                             (band ==
 948                              1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 949
 950                         /* permanently store EEPROM's channel regulatory flags
 951                          *   and max power in channel info database. */
 952                         ch_info->eeprom = eeprom_ch_info[ch];
 953
 954                         /* Copy the run-time flags so they are there even on
 955                          * invalid channels */
 956                         ch_info->flags = eeprom_ch_info[ch].flags;
 957                         /* First write that ht40 is not enabled, and then enable
 958                          * one by one */
 959                         ch_info->ht40_extension_channel =
 960                             IEEE80211_CHAN_NO_HT40;
 961
 962                         if (!(il_is_channel_valid(ch_info))) {
 963                                 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 964                                          "No traffic\n", ch_info->channel,
 965                                          ch_info->flags,
 966                                          il_is_channel_a_band(ch_info) ? "5.2" :
 967                                          "2.4");
 968                                 ch_info++;
 969                                 continue;
 970                         }
 971
 972                         /* Initialize regulatory-based run-time data */
 973                         ch_info->max_power_avg = ch_info->curr_txpow =
 974                             eeprom_ch_info[ch].max_power_avg;
 975                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 976                         ch_info->min_power = 0;
 977
 978                         D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 979                                  " Ad-Hoc %ssupported\n", ch_info->channel,
 980                                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 981                                  CHECK_AND_PRINT_I(VALID),
 982                                  CHECK_AND_PRINT_I(IBSS),
 983                                  CHECK_AND_PRINT_I(ACTIVE),
 984                                  CHECK_AND_PRINT_I(RADAR),
 985                                  CHECK_AND_PRINT_I(WIDE),
 986                                  CHECK_AND_PRINT_I(DFS),
 987                                  eeprom_ch_info[ch].flags,
 988                                  eeprom_ch_info[ch].max_power_avg,
 989                                  ((eeprom_ch_info[ch].
 990                                    flags & EEPROM_CHANNEL_IBSS) &&
 991                                   !(eeprom_ch_info[ch].
 992                                     flags & EEPROM_CHANNEL_RADAR)) ? "" :
 993                                  "not ");
 994
 995                         ch_info++;
 996                 }
 997         }
 998
 999         /* Check if we do have HT40 channels */
1000         if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1001             il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1002                 return 0;
1003
1004         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1005         for (band = 6; band <= 7; band++) {
1006                 enum nl80211_band ieeeband;
1007
1008                 il_init_band_reference(il, band, &eeprom_ch_count,
1009                                        &eeprom_ch_info, &eeprom_ch_idx);
1010
1011                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1012                 ieeeband =
1013                     (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1014
1015                 /* Loop through each band adding each of the channels */
1016                 for (ch = 0; ch < eeprom_ch_count; ch++) {
1017                         /* Set up driver's info for lower half */
1018                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1019                                               &eeprom_ch_info[ch],
1020                                               IEEE80211_CHAN_NO_HT40PLUS);
1021
1022                         /* Set up driver's info for upper half */
1023                         il_mod_ht40_chan_info(il, ieeeband,
1024                                               eeprom_ch_idx[ch] + 4,
1025                                               &eeprom_ch_info[ch],
1026                                               IEEE80211_CHAN_NO_HT40MINUS);
1027                 }
1028         }
1029
1030         return 0;
1031 }
1032 EXPORT_SYMBOL(il_init_channel_map);
1033
1034 /*
1035  * il_free_channel_map - undo allocations in il_init_channel_map
1036  */
1037 void
1038 il_free_channel_map(struct il_priv *il)
1039 {
1040         kfree(il->channel_info);
1041         il->channel_count = 0;
1042 }
1043 EXPORT_SYMBOL(il_free_channel_map);
1044
1045 /**
1046  * il_get_channel_info - Find driver's ilate channel info
1047  *
1048  * Based on band and channel number.
1049  */
1050 const struct il_channel_info *
1051 il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1052                     u16 channel)
1053 {
1054         int i;
1055
1056         switch (band) {
1057         case NL80211_BAND_5GHZ:
1058                 for (i = 14; i < il->channel_count; i++) {
1059                         if (il->channel_info[i].channel == channel)
1060                                 return &il->channel_info[i];
1061                 }
1062                 break;
1063         case NL80211_BAND_2GHZ:
1064                 if (channel >= 1 && channel <= 14)
1065                         return &il->channel_info[channel - 1];
1066                 break;
1067         default:
1068                 BUG();
1069         }
1070
1071         return NULL;
1072 }
1073 EXPORT_SYMBOL(il_get_channel_info);
1074
1075 /*
1076  * Setting power level allows the card to go to sleep when not busy.
1077  *
1078  * We calculate a sleep command based on the required latency, which
1079  * we get from mac80211.
1080  */
1081
1082 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1083                 cpu_to_le32(X0), \
1084                 cpu_to_le32(X1), \
1085                 cpu_to_le32(X2), \
1086                 cpu_to_le32(X3), \
1087                 cpu_to_le32(X4)  \
1088 }
1089
1090 static void
1091 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1092 {
1093         const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1094                 SLP_VEC(2, 2, 4, 6, 0xFF),
1095                 SLP_VEC(2, 4, 7, 10, 10),
1096                 SLP_VEC(4, 7, 10, 10, 0xFF)
1097         };
1098         int i, dtim_period, no_dtim;
1099         u32 max_sleep;
1100         bool skip;
1101
1102         memset(cmd, 0, sizeof(*cmd));
1103
1104         if (il->power_data.pci_pm)
1105                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1106
1107         /* if no Power Save, we are done */
1108         if (il->power_data.ps_disabled)
1109                 return;
1110
1111         cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1112         cmd->keep_alive_seconds = 0;
1113         cmd->debug_flags = 0;
1114         cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1115         cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1116         cmd->keep_alive_beacons = 0;
1117
1118         dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1119
1120         if (dtim_period <= 2) {
1121                 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1122                 no_dtim = 2;
1123         } else if (dtim_period <= 10) {
1124                 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1125                 no_dtim = 2;
1126         } else {
1127                 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1128                 no_dtim = 0;
1129         }
1130
1131         if (dtim_period == 0) {
1132                 dtim_period = 1;
1133                 skip = false;
1134         } else {
1135                 skip = !!no_dtim;
1136         }
1137
1138         if (skip) {
1139                 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1140
1141                 max_sleep = le32_to_cpu(tmp);
1142                 if (max_sleep == 0xFF)
1143                         max_sleep = dtim_period * (skip + 1);
1144                 else if (max_sleep >  dtim_period)
1145                         max_sleep = (max_sleep / dtim_period) * dtim_period;
1146                 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1147         } else {
1148                 max_sleep = dtim_period;
1149                 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1150         }
1151
1152         for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1153                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1154                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1155 }
1156
1157 static int
1158 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1159 {
1160         D_POWER("Sending power/sleep command\n");
1161         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1162         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1163         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1164         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1165                 le32_to_cpu(cmd->sleep_interval[0]),
1166                 le32_to_cpu(cmd->sleep_interval[1]),
1167                 le32_to_cpu(cmd->sleep_interval[2]),
1168                 le32_to_cpu(cmd->sleep_interval[3]),
1169                 le32_to_cpu(cmd->sleep_interval[4]));
1170
1171         return il_send_cmd_pdu(il, C_POWER_TBL,
1172                                sizeof(struct il_powertable_cmd), cmd);
1173 }
1174
1175 static int
1176 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1177 {
1178         int ret;
1179         bool update_chains;
1180
1181         lockdep_assert_held(&il->mutex);
1182
1183         /* Don't update the RX chain when chain noise calibration is running */
1184         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1185             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1186
1187         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1188                 return 0;
1189
1190         if (!il_is_ready_rf(il))
1191                 return -EIO;
1192
1193         /* scan complete use sleep_power_next, need to be updated */
1194         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1195         if (test_bit(S_SCANNING, &il->status) && !force) {
1196                 D_INFO("Defer power set mode while scanning\n");
1197                 return 0;
1198         }
1199
1200         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1201                 set_bit(S_POWER_PMI, &il->status);
1202
1203         ret = il_set_power(il, cmd);
1204         if (!ret) {
1205                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1206                         clear_bit(S_POWER_PMI, &il->status);
1207
1208                 if (il->ops->update_chain_flags && update_chains)
1209                         il->ops->update_chain_flags(il);
1210                 else if (il->ops->update_chain_flags)
1211                         D_POWER("Cannot update the power, chain noise "
1212                                 "calibration running: %d\n",
1213                                 il->chain_noise_data.state);
1214
1215                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1216         } else
1217                 IL_ERR("set power fail, ret = %d", ret);
1218
1219         return ret;
1220 }
1221
1222 int
1223 il_power_update_mode(struct il_priv *il, bool force)
1224 {
1225         struct il_powertable_cmd cmd;
1226
1227         il_build_powertable_cmd(il, &cmd);
1228
1229         return il_power_set_mode(il, &cmd, force);
1230 }
1231 EXPORT_SYMBOL(il_power_update_mode);
1232
1233 /* initialize to default */
1234 void
1235 il_power_initialize(struct il_priv *il)
1236 {
1237         u16 lctl;
1238
1239         pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1240         il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1241
1242         il->power_data.debug_sleep_level_override = -1;
1243
1244         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1245 }
1246 EXPORT_SYMBOL(il_power_initialize);
1247
1248 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1249  * sending probe req.  This should be set long enough to hear probe responses
1250  * from more than one AP.  */
1251 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1252 #define IL_ACTIVE_DWELL_TIME_52    (20)
1253
1254 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1255 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1256
1257 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1258  * Must be set longer than active dwell time.
1259  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1260 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1261 #define IL_PASSIVE_DWELL_TIME_52   (10)
1262 #define IL_PASSIVE_DWELL_BASE      (100)
1263 #define IL_CHANNEL_TUNE_TIME       5
1264
1265 static int
1266 il_send_scan_abort(struct il_priv *il)
1267 {
1268         int ret;
1269         struct il_rx_pkt *pkt;
1270         struct il_host_cmd cmd = {
1271                 .id = C_SCAN_ABORT,
1272                 .flags = CMD_WANT_SKB,
1273         };
1274
1275         /* Exit instantly with error when device is not ready
1276          * to receive scan abort command or it does not perform
1277          * hardware scan currently */
1278         if (!test_bit(S_READY, &il->status) ||
1279             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1280             !test_bit(S_SCAN_HW, &il->status) ||
1281             test_bit(S_FW_ERROR, &il->status) ||
1282             test_bit(S_EXIT_PENDING, &il->status))
1283                 return -EIO;
1284
1285         ret = il_send_cmd_sync(il, &cmd);
1286         if (ret)
1287                 return ret;
1288
1289         pkt = (struct il_rx_pkt *)cmd.reply_page;
1290         if (pkt->u.status != CAN_ABORT_STATUS) {
1291                 /* The scan abort will return 1 for success or
1292                  * 2 for "failure".  A failure condition can be
1293                  * due to simply not being in an active scan which
1294                  * can occur if we send the scan abort before we
1295                  * the microcode has notified us that a scan is
1296                  * completed. */
1297                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1298                 ret = -EIO;
1299         }
1300
1301         il_free_pages(il, cmd.reply_page);
1302         return ret;
1303 }
1304
1305 static void
1306 il_complete_scan(struct il_priv *il, bool aborted)
1307 {
1308         struct cfg80211_scan_info info = {
1309                 .aborted = aborted,
1310         };
1311
1312         /* check if scan was requested from mac80211 */
1313         if (il->scan_request) {
1314                 D_SCAN("Complete scan in mac80211\n");
1315                 ieee80211_scan_completed(il->hw, &info);
1316         }
1317
1318         il->scan_vif = NULL;
1319         il->scan_request = NULL;
1320 }
1321
1322 void
1323 il_force_scan_end(struct il_priv *il)
1324 {
1325         lockdep_assert_held(&il->mutex);
1326
1327         if (!test_bit(S_SCANNING, &il->status)) {
1328                 D_SCAN("Forcing scan end while not scanning\n");
1329                 return;
1330         }
1331
1332         D_SCAN("Forcing scan end\n");
1333         clear_bit(S_SCANNING, &il->status);
1334         clear_bit(S_SCAN_HW, &il->status);
1335         clear_bit(S_SCAN_ABORTING, &il->status);
1336         il_complete_scan(il, true);
1337 }
1338
1339 static void
1340 il_do_scan_abort(struct il_priv *il)
1341 {
1342         int ret;
1343
1344         lockdep_assert_held(&il->mutex);
1345
1346         if (!test_bit(S_SCANNING, &il->status)) {
1347                 D_SCAN("Not performing scan to abort\n");
1348                 return;
1349         }
1350
1351         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1352                 D_SCAN("Scan abort in progress\n");
1353                 return;
1354         }
1355
1356         ret = il_send_scan_abort(il);
1357         if (ret) {
1358                 D_SCAN("Send scan abort failed %d\n", ret);
1359                 il_force_scan_end(il);
1360         } else
1361                 D_SCAN("Successfully send scan abort\n");
1362 }
1363
1364 /**
1365  * il_scan_cancel - Cancel any currently executing HW scan
1366  */
1367 int
1368 il_scan_cancel(struct il_priv *il)
1369 {
1370         D_SCAN("Queuing abort scan\n");
1371         queue_work(il->workqueue, &il->abort_scan);
1372         return 0;
1373 }
1374 EXPORT_SYMBOL(il_scan_cancel);
1375
1376 /**
1377  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1378  * @ms: amount of time to wait (in milliseconds) for scan to abort
1379  *
1380  */
1381 int
1382 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1383 {
1384         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1385
1386         lockdep_assert_held(&il->mutex);
1387
1388         D_SCAN("Scan cancel timeout\n");
1389
1390         il_do_scan_abort(il);
1391
1392         while (time_before_eq(jiffies, timeout)) {
1393                 if (!test_bit(S_SCAN_HW, &il->status))
1394                         break;
1395                 msleep(20);
1396         }
1397
1398         return test_bit(S_SCAN_HW, &il->status);
1399 }
1400 EXPORT_SYMBOL(il_scan_cancel_timeout);
1401
1402 /* Service response to C_SCAN (0x80) */
1403 static void
1404 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1405 {
1406 #ifdef CONFIG_IWLEGACY_DEBUG
1407         struct il_rx_pkt *pkt = rxb_addr(rxb);
1408         struct il_scanreq_notification *notif =
1409             (struct il_scanreq_notification *)pkt->u.raw;
1410
1411         D_SCAN("Scan request status = 0x%x\n", notif->status);
1412 #endif
1413 }
1414
1415 /* Service N_SCAN_START (0x82) */
1416 static void
1417 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1418 {
1419         struct il_rx_pkt *pkt = rxb_addr(rxb);
1420         struct il_scanstart_notification *notif =
1421             (struct il_scanstart_notification *)pkt->u.raw;
1422         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1423         D_SCAN("Scan start: " "%d [802.11%s] "
1424                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1425                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1426                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1427 }
1428
1429 /* Service N_SCAN_RESULTS (0x83) */
1430 static void
1431 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1432 {
1433 #ifdef CONFIG_IWLEGACY_DEBUG
1434         struct il_rx_pkt *pkt = rxb_addr(rxb);
1435         struct il_scanresults_notification *notif =
1436             (struct il_scanresults_notification *)pkt->u.raw;
1437
1438         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1439                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1440                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1441                le32_to_cpu(notif->stats[0]),
1442                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1443 #endif
1444 }
1445
1446 /* Service N_SCAN_COMPLETE (0x84) */
1447 static void
1448 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1449 {
1450
1451 #ifdef CONFIG_IWLEGACY_DEBUG
1452         struct il_rx_pkt *pkt = rxb_addr(rxb);
1453         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1454 #endif
1455
1456         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1457                scan_notif->scanned_channels, scan_notif->tsf_low,
1458                scan_notif->tsf_high, scan_notif->status);
1459
1460         /* The HW is no longer scanning */
1461         clear_bit(S_SCAN_HW, &il->status);
1462
1463         D_SCAN("Scan on %sGHz took %dms\n",
1464                (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1465                jiffies_to_msecs(jiffies - il->scan_start));
1466
1467         queue_work(il->workqueue, &il->scan_completed);
1468 }
1469
1470 void
1471 il_setup_rx_scan_handlers(struct il_priv *il)
1472 {
1473         /* scan handlers */
1474         il->handlers[C_SCAN] = il_hdl_scan;
1475         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1476         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1477         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1478 }
1479 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1480
1481 u16
1482 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1483                          u8 n_probes)
1484 {
1485         if (band == NL80211_BAND_5GHZ)
1486                 return IL_ACTIVE_DWELL_TIME_52 +
1487                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1488         else
1489                 return IL_ACTIVE_DWELL_TIME_24 +
1490                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1491 }
1492 EXPORT_SYMBOL(il_get_active_dwell_time);
1493
1494 u16
1495 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1496                           struct ieee80211_vif *vif)
1497 {
1498         u16 value;
1499
1500         u16 passive =
1501             (band ==
1502              NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1503             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1504             IL_PASSIVE_DWELL_TIME_52;
1505
1506         if (il_is_any_associated(il)) {
1507                 /*
1508                  * If we're associated, we clamp the maximum passive
1509                  * dwell time to be 98% of the smallest beacon interval
1510                  * (minus 2 * channel tune time)
1511                  */
1512                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1513                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1514                         value = IL_PASSIVE_DWELL_BASE;
1515                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1516                 passive = min(value, passive);
1517         }
1518
1519         return passive;
1520 }
1521 EXPORT_SYMBOL(il_get_passive_dwell_time);
1522
1523 void
1524 il_init_scan_params(struct il_priv *il)
1525 {
1526         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1527         if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1528                 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1529         if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1530                 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1531 }
1532 EXPORT_SYMBOL(il_init_scan_params);
1533
1534 static int
1535 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1536 {
1537         int ret;
1538
1539         lockdep_assert_held(&il->mutex);
1540
1541         cancel_delayed_work(&il->scan_check);
1542
1543         if (!il_is_ready_rf(il)) {
1544                 IL_WARN("Request scan called when driver not ready.\n");
1545                 return -EIO;
1546         }
1547
1548         if (test_bit(S_SCAN_HW, &il->status)) {
1549                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1550                 return -EBUSY;
1551         }
1552
1553         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1554                 D_SCAN("Scan request while abort pending.\n");
1555                 return -EBUSY;
1556         }
1557
1558         D_SCAN("Starting scan...\n");
1559
1560         set_bit(S_SCANNING, &il->status);
1561         il->scan_start = jiffies;
1562
1563         ret = il->ops->request_scan(il, vif);
1564         if (ret) {
1565                 clear_bit(S_SCANNING, &il->status);
1566                 return ret;
1567         }
1568
1569         queue_delayed_work(il->workqueue, &il->scan_check,
1570                            IL_SCAN_CHECK_WATCHDOG);
1571
1572         return 0;
1573 }
1574
1575 int
1576 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1577                struct ieee80211_scan_request *hw_req)
1578 {
1579         struct cfg80211_scan_request *req = &hw_req->req;
1580         struct il_priv *il = hw->priv;
1581         int ret;
1582
1583         if (req->n_channels == 0) {
1584                 IL_ERR("Can not scan on no channels.\n");
1585                 return -EINVAL;
1586         }
1587
1588         mutex_lock(&il->mutex);
1589         D_MAC80211("enter\n");
1590
1591         if (test_bit(S_SCANNING, &il->status)) {
1592                 D_SCAN("Scan already in progress.\n");
1593                 ret = -EAGAIN;
1594                 goto out_unlock;
1595         }
1596
1597         /* mac80211 will only ask for one band at a time */
1598         il->scan_request = req;
1599         il->scan_vif = vif;
1600         il->scan_band = req->channels[0]->band;
1601
1602         ret = il_scan_initiate(il, vif);
1603
1604 out_unlock:
1605         D_MAC80211("leave ret %d\n", ret);
1606         mutex_unlock(&il->mutex);
1607
1608         return ret;
1609 }
1610 EXPORT_SYMBOL(il_mac_hw_scan);
1611
1612 static void
1613 il_bg_scan_check(struct work_struct *data)
1614 {
1615         struct il_priv *il =
1616             container_of(data, struct il_priv, scan_check.work);
1617
1618         D_SCAN("Scan check work\n");
1619
1620         /* Since we are here firmware does not finish scan and
1621          * most likely is in bad shape, so we don't bother to
1622          * send abort command, just force scan complete to mac80211 */
1623         mutex_lock(&il->mutex);
1624         il_force_scan_end(il);
1625         mutex_unlock(&il->mutex);
1626 }
1627
1628 /**
1629  * il_fill_probe_req - fill in all required fields and IE for probe request
1630  */
1631
1632 u16
1633 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1634                   const u8 *ta, const u8 *ies, int ie_len, int left)
1635 {
1636         int len = 0;
1637         u8 *pos = NULL;
1638
1639         /* Make sure there is enough space for the probe request,
1640          * two mandatory IEs and the data */
1641         left -= 24;
1642         if (left < 0)
1643                 return 0;
1644
1645         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1646         eth_broadcast_addr(frame->da);
1647         memcpy(frame->sa, ta, ETH_ALEN);
1648         eth_broadcast_addr(frame->bssid);
1649         frame->seq_ctrl = 0;
1650
1651         len += 24;
1652
1653         /* ...next IE... */
1654         pos = &frame->u.probe_req.variable[0];
1655
1656         /* fill in our indirect SSID IE */
1657         left -= 2;
1658         if (left < 0)
1659                 return 0;
1660         *pos++ = WLAN_EID_SSID;
1661         *pos++ = 0;
1662
1663         len += 2;
1664
1665         if (WARN_ON(left < ie_len))
1666                 return len;
1667
1668         if (ies && ie_len) {
1669                 memcpy(pos, ies, ie_len);
1670                 len += ie_len;
1671         }
1672
1673         return (u16) len;
1674 }
1675 EXPORT_SYMBOL(il_fill_probe_req);
1676
1677 static void
1678 il_bg_abort_scan(struct work_struct *work)
1679 {
1680         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1681
1682         D_SCAN("Abort scan work\n");
1683
1684         /* We keep scan_check work queued in case when firmware will not
1685          * report back scan completed notification */
1686         mutex_lock(&il->mutex);
1687         il_scan_cancel_timeout(il, 200);
1688         mutex_unlock(&il->mutex);
1689 }
1690
1691 static void
1692 il_bg_scan_completed(struct work_struct *work)
1693 {
1694         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1695         bool aborted;
1696
1697         D_SCAN("Completed scan.\n");
1698
1699         cancel_delayed_work(&il->scan_check);
1700
1701         mutex_lock(&il->mutex);
1702
1703         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1704         if (aborted)
1705                 D_SCAN("Aborted scan completed.\n");
1706
1707         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1708                 D_SCAN("Scan already completed.\n");
1709                 goto out_settings;
1710         }
1711
1712         il_complete_scan(il, aborted);
1713
1714 out_settings:
1715         /* Can we still talk to firmware ? */
1716         if (!il_is_ready_rf(il))
1717                 goto out;
1718
1719         /*
1720          * We do not commit power settings while scan is pending,
1721          * do it now if the settings changed.
1722          */
1723         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1724         il_set_tx_power(il, il->tx_power_next, false);
1725
1726         il->ops->post_scan(il);
1727
1728 out:
1729         mutex_unlock(&il->mutex);
1730 }
1731
1732 void
1733 il_setup_scan_deferred_work(struct il_priv *il)
1734 {
1735         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1736         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1737         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1738 }
1739 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1740
1741 void
1742 il_cancel_scan_deferred_work(struct il_priv *il)
1743 {
1744         cancel_work_sync(&il->abort_scan);
1745         cancel_work_sync(&il->scan_completed);
1746
1747         if (cancel_delayed_work_sync(&il->scan_check)) {
1748                 mutex_lock(&il->mutex);
1749                 il_force_scan_end(il);
1750                 mutex_unlock(&il->mutex);
1751         }
1752 }
1753 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1754
1755 /* il->sta_lock must be held */
1756 static void
1757 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1758 {
1759
1760         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1761                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1762                        sta_id, il->stations[sta_id].sta.sta.addr);
1763
1764         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1765                 D_ASSOC("STA id %u addr %pM already present"
1766                         " in uCode (according to driver)\n", sta_id,
1767                         il->stations[sta_id].sta.sta.addr);
1768         } else {
1769                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1770                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1771                         il->stations[sta_id].sta.sta.addr);
1772         }
1773 }
1774
1775 static int
1776 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1777                         struct il_rx_pkt *pkt, bool sync)
1778 {
1779         u8 sta_id = addsta->sta.sta_id;
1780         unsigned long flags;
1781         int ret = -EIO;
1782
1783         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1784                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1785                 return ret;
1786         }
1787
1788         D_INFO("Processing response for adding station %u\n", sta_id);
1789
1790         spin_lock_irqsave(&il->sta_lock, flags);
1791
1792         switch (pkt->u.add_sta.status) {
1793         case ADD_STA_SUCCESS_MSK:
1794                 D_INFO("C_ADD_STA PASSED\n");
1795                 il_sta_ucode_activate(il, sta_id);
1796                 ret = 0;
1797                 break;
1798         case ADD_STA_NO_ROOM_IN_TBL:
1799                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1800                 break;
1801         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1802                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1803                        sta_id);
1804                 break;
1805         case ADD_STA_MODIFY_NON_EXIST_STA:
1806                 IL_ERR("Attempting to modify non-existing station %d\n",
1807                        sta_id);
1808                 break;
1809         default:
1810                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1811                 break;
1812         }
1813
1814         D_INFO("%s station id %u addr %pM\n",
1815                il->stations[sta_id].sta.mode ==
1816                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1817                il->stations[sta_id].sta.sta.addr);
1818
1819         /*
1820          * XXX: The MAC address in the command buffer is often changed from
1821          * the original sent to the device. That is, the MAC address
1822          * written to the command buffer often is not the same MAC address
1823          * read from the command buffer when the command returns. This
1824          * issue has not yet been resolved and this debugging is left to
1825          * observe the problem.
1826          */
1827         D_INFO("%s station according to cmd buffer %pM\n",
1828                il->stations[sta_id].sta.mode ==
1829                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1830         spin_unlock_irqrestore(&il->sta_lock, flags);
1831
1832         return ret;
1833 }
1834
1835 static void
1836 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1837                     struct il_rx_pkt *pkt)
1838 {
1839         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1840
1841         il_process_add_sta_resp(il, addsta, pkt, false);
1842
1843 }
1844
1845 int
1846 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1847 {
1848         struct il_rx_pkt *pkt = NULL;
1849         int ret = 0;
1850         u8 data[sizeof(*sta)];
1851         struct il_host_cmd cmd = {
1852                 .id = C_ADD_STA,
1853                 .flags = flags,
1854                 .data = data,
1855         };
1856         u8 sta_id __maybe_unused = sta->sta.sta_id;
1857
1858         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1859                flags & CMD_ASYNC ? "a" : "");
1860
1861         if (flags & CMD_ASYNC)
1862                 cmd.callback = il_add_sta_callback;
1863         else {
1864                 cmd.flags |= CMD_WANT_SKB;
1865                 might_sleep();
1866         }
1867
1868         cmd.len = il->ops->build_addsta_hcmd(sta, data);
1869         ret = il_send_cmd(il, &cmd);
1870         if (ret)
1871                 return ret;
1872         if (flags & CMD_ASYNC)
1873                 return 0;
1874
1875         pkt = (struct il_rx_pkt *)cmd.reply_page;
1876         ret = il_process_add_sta_resp(il, sta, pkt, true);
1877
1878         il_free_pages(il, cmd.reply_page);
1879
1880         return ret;
1881 }
1882 EXPORT_SYMBOL(il_send_add_sta);
1883
1884 static void
1885 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1886 {
1887         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1888         __le32 sta_flags;
1889
1890         if (!sta || !sta_ht_inf->ht_supported)
1891                 goto done;
1892
1893         D_ASSOC("spatial multiplexing power save mode: %s\n",
1894                 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1895                 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1896                 "disabled");
1897
1898         sta_flags = il->stations[idx].sta.station_flags;
1899
1900         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1901
1902         switch (sta->smps_mode) {
1903         case IEEE80211_SMPS_STATIC:
1904                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1905                 break;
1906         case IEEE80211_SMPS_DYNAMIC:
1907                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1908                 break;
1909         case IEEE80211_SMPS_OFF:
1910                 break;
1911         default:
1912                 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1913                 break;
1914         }
1915
1916         sta_flags |=
1917             cpu_to_le32((u32) sta_ht_inf->
1918                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1919
1920         sta_flags |=
1921             cpu_to_le32((u32) sta_ht_inf->
1922                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1923
1924         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1925                 sta_flags |= STA_FLG_HT40_EN_MSK;
1926         else
1927                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1928
1929         il->stations[idx].sta.station_flags = sta_flags;
1930 done:
1931         return;
1932 }
1933
1934 /**
1935  * il_prep_station - Prepare station information for addition
1936  *
1937  * should be called with sta_lock held
1938  */
1939 u8
1940 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1941                 struct ieee80211_sta *sta)
1942 {
1943         struct il_station_entry *station;
1944         int i;
1945         u8 sta_id = IL_INVALID_STATION;
1946         u16 rate;
1947
1948         if (is_ap)
1949                 sta_id = IL_AP_ID;
1950         else if (is_broadcast_ether_addr(addr))
1951                 sta_id = il->hw_params.bcast_id;
1952         else
1953                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1954                         if (ether_addr_equal(il->stations[i].sta.sta.addr,
1955                                              addr)) {
1956                                 sta_id = i;
1957                                 break;
1958                         }
1959
1960                         if (!il->stations[i].used &&
1961                             sta_id == IL_INVALID_STATION)
1962                                 sta_id = i;
1963                 }
1964
1965         /*
1966          * These two conditions have the same outcome, but keep them
1967          * separate
1968          */
1969         if (unlikely(sta_id == IL_INVALID_STATION))
1970                 return sta_id;
1971
1972         /*
1973          * uCode is not able to deal with multiple requests to add a
1974          * station. Keep track if one is in progress so that we do not send
1975          * another.
1976          */
1977         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1978                 D_INFO("STA %d already in process of being added.\n", sta_id);
1979                 return sta_id;
1980         }
1981
1982         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1983             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1984             ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1985                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1986                         sta_id, addr);
1987                 return sta_id;
1988         }
1989
1990         station = &il->stations[sta_id];
1991         station->used = IL_STA_DRIVER_ACTIVE;
1992         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1993         il->num_stations++;
1994
1995         /* Set up the C_ADD_STA command to send to device */
1996         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1997         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1998         station->sta.mode = 0;
1999         station->sta.sta.sta_id = sta_id;
2000         station->sta.station_flags = 0;
2001
2002         /*
2003          * OK to call unconditionally, since local stations (IBSS BSSID
2004          * STA and broadcast STA) pass in a NULL sta, and mac80211
2005          * doesn't allow HT IBSS.
2006          */
2007         il_set_ht_add_station(il, sta_id, sta);
2008
2009         /* 3945 only */
2010         rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
2011         /* Turn on both antennas for the station... */
2012         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
2013
2014         return sta_id;
2015
2016 }
2017 EXPORT_SYMBOL_GPL(il_prep_station);
2018
2019 #define STA_WAIT_TIMEOUT (HZ/2)
2020
2021 /**
2022  * il_add_station_common -
2023  */
2024 int
2025 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2026                       struct ieee80211_sta *sta, u8 *sta_id_r)
2027 {
2028         unsigned long flags_spin;
2029         int ret = 0;
2030         u8 sta_id;
2031         struct il_addsta_cmd sta_cmd;
2032
2033         *sta_id_r = 0;
2034         spin_lock_irqsave(&il->sta_lock, flags_spin);
2035         sta_id = il_prep_station(il, addr, is_ap, sta);
2036         if (sta_id == IL_INVALID_STATION) {
2037                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2038                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2039                 return -EINVAL;
2040         }
2041
2042         /*
2043          * uCode is not able to deal with multiple requests to add a
2044          * station. Keep track if one is in progress so that we do not send
2045          * another.
2046          */
2047         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2048                 D_INFO("STA %d already in process of being added.\n", sta_id);
2049                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2050                 return -EEXIST;
2051         }
2052
2053         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2054             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2055                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2056                         sta_id, addr);
2057                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2058                 return -EEXIST;
2059         }
2060
2061         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2062         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2063                sizeof(struct il_addsta_cmd));
2064         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2065
2066         /* Add station to device's station table */
2067         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2068         if (ret) {
2069                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2070                 IL_ERR("Adding station %pM failed.\n",
2071                        il->stations[sta_id].sta.sta.addr);
2072                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2073                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2074                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2075         }
2076         *sta_id_r = sta_id;
2077         return ret;
2078 }
2079 EXPORT_SYMBOL(il_add_station_common);
2080
2081 /**
2082  * il_sta_ucode_deactivate - deactivate ucode status for a station
2083  *
2084  * il->sta_lock must be held
2085  */
2086 static void
2087 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2088 {
2089         /* Ucode must be active and driver must be non active */
2090         if ((il->stations[sta_id].
2091              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2092             IL_STA_UCODE_ACTIVE)
2093                 IL_ERR("removed non active STA %u\n", sta_id);
2094
2095         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2096
2097         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2098         D_ASSOC("Removed STA %u\n", sta_id);
2099 }
2100
2101 static int
2102 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2103                        bool temporary)
2104 {
2105         struct il_rx_pkt *pkt;
2106         int ret;
2107
2108         unsigned long flags_spin;
2109         struct il_rem_sta_cmd rm_sta_cmd;
2110
2111         struct il_host_cmd cmd = {
2112                 .id = C_REM_STA,
2113                 .len = sizeof(struct il_rem_sta_cmd),
2114                 .flags = CMD_SYNC,
2115                 .data = &rm_sta_cmd,
2116         };
2117
2118         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2119         rm_sta_cmd.num_sta = 1;
2120         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2121
2122         cmd.flags |= CMD_WANT_SKB;
2123
2124         ret = il_send_cmd(il, &cmd);
2125
2126         if (ret)
2127                 return ret;
2128
2129         pkt = (struct il_rx_pkt *)cmd.reply_page;
2130         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2131                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2132                 ret = -EIO;
2133         }
2134
2135         if (!ret) {
2136                 switch (pkt->u.rem_sta.status) {
2137                 case REM_STA_SUCCESS_MSK:
2138                         if (!temporary) {
2139                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2140                                 il_sta_ucode_deactivate(il, sta_id);
2141                                 spin_unlock_irqrestore(&il->sta_lock,
2142                                                        flags_spin);
2143                         }
2144                         D_ASSOC("C_REM_STA PASSED\n");
2145                         break;
2146                 default:
2147                         ret = -EIO;
2148                         IL_ERR("C_REM_STA failed\n");
2149                         break;
2150                 }
2151         }
2152         il_free_pages(il, cmd.reply_page);
2153
2154         return ret;
2155 }
2156
2157 /**
2158  * il_remove_station - Remove driver's knowledge of station.
2159  */
2160 int
2161 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2162 {
2163         unsigned long flags;
2164
2165         if (!il_is_ready(il)) {
2166                 D_INFO("Unable to remove station %pM, device not ready.\n",
2167                        addr);
2168                 /*
2169                  * It is typical for stations to be removed when we are
2170                  * going down. Return success since device will be down
2171                  * soon anyway
2172                  */
2173                 return 0;
2174         }
2175
2176         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2177
2178         if (WARN_ON(sta_id == IL_INVALID_STATION))
2179                 return -EINVAL;
2180
2181         spin_lock_irqsave(&il->sta_lock, flags);
2182
2183         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2184                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2185                 goto out_err;
2186         }
2187
2188         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2189                 D_INFO("Removing %pM but non UCODE active\n", addr);
2190                 goto out_err;
2191         }
2192
2193         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2194                 kfree(il->stations[sta_id].lq);
2195                 il->stations[sta_id].lq = NULL;
2196         }
2197
2198         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2199
2200         il->num_stations--;
2201
2202         BUG_ON(il->num_stations < 0);
2203
2204         spin_unlock_irqrestore(&il->sta_lock, flags);
2205
2206         return il_send_remove_station(il, addr, sta_id, false);
2207 out_err:
2208         spin_unlock_irqrestore(&il->sta_lock, flags);
2209         return -EINVAL;
2210 }
2211 EXPORT_SYMBOL_GPL(il_remove_station);
2212
2213 /**
2214  * il_clear_ucode_stations - clear ucode station table bits
2215  *
2216  * This function clears all the bits in the driver indicating
2217  * which stations are active in the ucode. Call when something
2218  * other than explicit station management would cause this in
2219  * the ucode, e.g. unassociated RXON.
2220  */
2221 void
2222 il_clear_ucode_stations(struct il_priv *il)
2223 {
2224         int i;
2225         unsigned long flags_spin;
2226         bool cleared = false;
2227
2228         D_INFO("Clearing ucode stations in driver\n");
2229
2230         spin_lock_irqsave(&il->sta_lock, flags_spin);
2231         for (i = 0; i < il->hw_params.max_stations; i++) {
2232                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2233                         D_INFO("Clearing ucode active for station %d\n", i);
2234                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2235                         cleared = true;
2236                 }
2237         }
2238         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2239
2240         if (!cleared)
2241                 D_INFO("No active stations found to be cleared\n");
2242 }
2243 EXPORT_SYMBOL(il_clear_ucode_stations);
2244
2245 /**
2246  * il_restore_stations() - Restore driver known stations to device
2247  *
2248  * All stations considered active by driver, but not present in ucode, is
2249  * restored.
2250  *
2251  * Function sleeps.
2252  */
2253 void
2254 il_restore_stations(struct il_priv *il)
2255 {
2256         struct il_addsta_cmd sta_cmd;
2257         struct il_link_quality_cmd lq;
2258         unsigned long flags_spin;
2259         int i;
2260         bool found = false;
2261         int ret;
2262         bool send_lq;
2263
2264         if (!il_is_ready(il)) {
2265                 D_INFO("Not ready yet, not restoring any stations.\n");
2266                 return;
2267         }
2268
2269         D_ASSOC("Restoring all known stations ... start.\n");
2270         spin_lock_irqsave(&il->sta_lock, flags_spin);
2271         for (i = 0; i < il->hw_params.max_stations; i++) {
2272                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2273                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2274                         D_ASSOC("Restoring sta %pM\n",
2275                                 il->stations[i].sta.sta.addr);
2276                         il->stations[i].sta.mode = 0;
2277                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2278                         found = true;
2279                 }
2280         }
2281
2282         for (i = 0; i < il->hw_params.max_stations; i++) {
2283                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2284                         memcpy(&sta_cmd, &il->stations[i].sta,
2285                                sizeof(struct il_addsta_cmd));
2286                         send_lq = false;
2287                         if (il->stations[i].lq) {
2288                                 memcpy(&lq, il->stations[i].lq,
2289                                        sizeof(struct il_link_quality_cmd));
2290                                 send_lq = true;
2291                         }
2292                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2293                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2294                         if (ret) {
2295                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2296                                 IL_ERR("Adding station %pM failed.\n",
2297                                        il->stations[i].sta.sta.addr);
2298                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2299                                 il->stations[i].used &=
2300                                     ~IL_STA_UCODE_INPROGRESS;
2301                                 spin_unlock_irqrestore(&il->sta_lock,
2302                                                        flags_spin);
2303                         }
2304                         /*
2305                          * Rate scaling has already been initialized, send
2306                          * current LQ command
2307                          */
2308                         if (send_lq)
2309                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2310                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2311                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2312                 }
2313         }
2314
2315         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2316         if (!found)
2317                 D_INFO("Restoring all known stations"
2318                        " .... no stations to be restored.\n");
2319         else
2320                 D_INFO("Restoring all known stations" " .... complete.\n");
2321 }
2322 EXPORT_SYMBOL(il_restore_stations);
2323
2324 int
2325 il_get_free_ucode_key_idx(struct il_priv *il)
2326 {
2327         int i;
2328
2329         for (i = 0; i < il->sta_key_max_num; i++)
2330                 if (!test_and_set_bit(i, &il->ucode_key_table))
2331                         return i;
2332
2333         return WEP_INVALID_OFFSET;
2334 }
2335 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2336
2337 void
2338 il_dealloc_bcast_stations(struct il_priv *il)
2339 {
2340         unsigned long flags;
2341         int i;
2342
2343         spin_lock_irqsave(&il->sta_lock, flags);
2344         for (i = 0; i < il->hw_params.max_stations; i++) {
2345                 if (!(il->stations[i].used & IL_STA_BCAST))
2346                         continue;
2347
2348                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2349                 il->num_stations--;
2350                 BUG_ON(il->num_stations < 0);
2351                 kfree(il->stations[i].lq);
2352                 il->stations[i].lq = NULL;
2353         }
2354         spin_unlock_irqrestore(&il->sta_lock, flags);
2355 }
2356 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2357
2358 #ifdef CONFIG_IWLEGACY_DEBUG
2359 static void
2360 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2361 {
2362         int i;
2363         D_RATE("lq station id 0x%x\n", lq->sta_id);
2364         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2365                lq->general_params.dual_stream_ant_msk);
2366
2367         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2368                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2369 }
2370 #else
2371 static inline void
2372 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2373 {
2374 }
2375 #endif
2376
2377 /**
2378  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2379  *
2380  * It sometimes happens when a HT rate has been in use and we
2381  * loose connectivity with AP then mac80211 will first tell us that the
2382  * current channel is not HT anymore before removing the station. In such a
2383  * scenario the RXON flags will be updated to indicate we are not
2384  * communicating HT anymore, but the LQ command may still contain HT rates.
2385  * Test for this to prevent driver from sending LQ command between the time
2386  * RXON flags are updated and when LQ command is updated.
2387  */
2388 static bool
2389 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2390 {
2391         int i;
2392
2393         if (il->ht.enabled)
2394                 return true;
2395
2396         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2397         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2398                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2399                         D_INFO("idx %d of LQ expects HT channel\n", i);
2400                         return false;
2401                 }
2402         }
2403         return true;
2404 }
2405
2406 /**
2407  * il_send_lq_cmd() - Send link quality command
2408  * @init: This command is sent as part of station initialization right
2409  *        after station has been added.
2410  *
2411  * The link quality command is sent as the last step of station creation.
2412  * This is the special case in which init is set and we call a callback in
2413  * this case to clear the state indicating that station creation is in
2414  * progress.
2415  */
2416 int
2417 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2418                u8 flags, bool init)
2419 {
2420         int ret = 0;
2421         unsigned long flags_spin;
2422
2423         struct il_host_cmd cmd = {
2424                 .id = C_TX_LINK_QUALITY_CMD,
2425                 .len = sizeof(struct il_link_quality_cmd),
2426                 .flags = flags,
2427                 .data = lq,
2428         };
2429
2430         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2431                 return -EINVAL;
2432
2433         spin_lock_irqsave(&il->sta_lock, flags_spin);
2434         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2435                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2436                 return -EINVAL;
2437         }
2438         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2439
2440         il_dump_lq_cmd(il, lq);
2441         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2442
2443         if (il_is_lq_table_valid(il, lq))
2444                 ret = il_send_cmd(il, &cmd);
2445         else
2446                 ret = -EINVAL;
2447
2448         if (cmd.flags & CMD_ASYNC)
2449                 return ret;
2450
2451         if (init) {
2452                 D_INFO("init LQ command complete,"
2453                        " clearing sta addition status for sta %d\n",
2454                        lq->sta_id);
2455                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2456                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2457                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2458         }
2459         return ret;
2460 }
2461 EXPORT_SYMBOL(il_send_lq_cmd);
2462
2463 int
2464 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2465                   struct ieee80211_sta *sta)
2466 {
2467         struct il_priv *il = hw->priv;
2468         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2469         int ret;
2470
2471         mutex_lock(&il->mutex);
2472         D_MAC80211("enter station %pM\n", sta->addr);
2473
2474         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2475         if (ret)
2476                 IL_ERR("Error removing station %pM\n", sta->addr);
2477
2478         D_MAC80211("leave ret %d\n", ret);
2479         mutex_unlock(&il->mutex);
2480
2481         return ret;
2482 }
2483 EXPORT_SYMBOL(il_mac_sta_remove);
2484
2485 /************************** RX-FUNCTIONS ****************************/
2486 /*
2487  * Rx theory of operation
2488  *
2489  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2490  * each of which point to Receive Buffers to be filled by the NIC.  These get
2491  * used not only for Rx frames, but for any command response or notification
2492  * from the NIC.  The driver and NIC manage the Rx buffers by means
2493  * of idxes into the circular buffer.
2494  *
2495  * Rx Queue Indexes
2496  * The host/firmware share two idx registers for managing the Rx buffers.
2497  *
2498  * The READ idx maps to the first position that the firmware may be writing
2499  * to -- the driver can read up to (but not including) this position and get
2500  * good data.
2501  * The READ idx is managed by the firmware once the card is enabled.
2502  *
2503  * The WRITE idx maps to the last position the driver has read from -- the
2504  * position preceding WRITE is the last slot the firmware can place a packet.
2505  *
2506  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2507  * WRITE = READ.
2508  *
2509  * During initialization, the host sets up the READ queue position to the first
2510  * IDX position, and WRITE to the last (READ - 1 wrapped)
2511  *
2512  * When the firmware places a packet in a buffer, it will advance the READ idx
2513  * and fire the RX interrupt.  The driver can then query the READ idx and
2514  * process as many packets as possible, moving the WRITE idx forward as it
2515  * resets the Rx queue buffers with new memory.
2516  *
2517  * The management in the driver is as follows:
2518  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2519  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2520  *   to replenish the iwl->rxq->rx_free.
2521  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2522  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2523  *   'processed' and 'read' driver idxes as well)
2524  * + A received packet is processed and handed to the kernel network stack,
2525  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2526  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2527  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2528  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2529  *   were enough free buffers and RX_STALLED is set it is cleared.
2530  *
2531  *
2532  * Driver sequence:
2533  *
2534  * il_rx_queue_alloc()   Allocates rx_free
2535  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2536  *                            il_rx_queue_restock
2537  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2538  *                            queue, updates firmware pointers, and updates
2539  *                            the WRITE idx.  If insufficient rx_free buffers
2540  *                            are available, schedules il_rx_replenish
2541  *
2542  * -- enable interrupts --
2543  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2544  *                            READ IDX, detaching the SKB from the pool.
2545  *                            Moves the packet buffer from queue to rx_used.
2546  *                            Calls il_rx_queue_restock to refill any empty
2547  *                            slots.
2548  * ...
2549  *
2550  */
2551
2552 /**
2553  * il_rx_queue_space - Return number of free slots available in queue.
2554  */
2555 int
2556 il_rx_queue_space(const struct il_rx_queue *q)
2557 {
2558         int s = q->read - q->write;
2559         if (s <= 0)
2560                 s += RX_QUEUE_SIZE;
2561         /* keep some buffer to not confuse full and empty queue */
2562         s -= 2;
2563         if (s < 0)
2564                 s = 0;
2565         return s;
2566 }
2567 EXPORT_SYMBOL(il_rx_queue_space);
2568
2569 /**
2570  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2571  */
2572 void
2573 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2574 {
2575         unsigned long flags;
2576         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2577         u32 reg;
2578
2579         spin_lock_irqsave(&q->lock, flags);
2580
2581         if (q->need_update == 0)
2582                 goto exit_unlock;
2583
2584         /* If power-saving is in use, make sure device is awake */
2585         if (test_bit(S_POWER_PMI, &il->status)) {
2586                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2587
2588                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2589                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2590                                reg);
2591                         il_set_bit(il, CSR_GP_CNTRL,
2592                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2593                         goto exit_unlock;
2594                 }
2595
2596                 q->write_actual = (q->write & ~0x7);
2597                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2598
2599                 /* Else device is assumed to be awake */
2600         } else {
2601                 /* Device expects a multiple of 8 */
2602                 q->write_actual = (q->write & ~0x7);
2603                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2604         }
2605
2606         q->need_update = 0;
2607
2608 exit_unlock:
2609         spin_unlock_irqrestore(&q->lock, flags);
2610 }
2611 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2612
2613 int
2614 il_rx_queue_alloc(struct il_priv *il)
2615 {
2616         struct il_rx_queue *rxq = &il->rxq;
2617         struct device *dev = &il->pci_dev->dev;
2618         int i;
2619
2620         spin_lock_init(&rxq->lock);
2621         INIT_LIST_HEAD(&rxq->rx_free);
2622         INIT_LIST_HEAD(&rxq->rx_used);
2623
2624         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2625         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2626                                      GFP_KERNEL);
2627         if (!rxq->bd)
2628                 goto err_bd;
2629
2630         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2631                                           &rxq->rb_stts_dma, GFP_KERNEL);
2632         if (!rxq->rb_stts)
2633                 goto err_rb;
2634
2635         /* Fill the rx_used queue with _all_ of the Rx buffers */
2636         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2637                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2638
2639         /* Set us so that we have processed and used all buffers, but have
2640          * not restocked the Rx queue with fresh buffers */
2641         rxq->read = rxq->write = 0;
2642         rxq->write_actual = 0;
2643         rxq->free_count = 0;
2644         rxq->need_update = 0;
2645         return 0;
2646
2647 err_rb:
2648         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2649                           rxq->bd_dma);
2650 err_bd:
2651         return -ENOMEM;
2652 }
2653 EXPORT_SYMBOL(il_rx_queue_alloc);
2654
2655 void
2656 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2657 {
2658         struct il_rx_pkt *pkt = rxb_addr(rxb);
2659         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2660
2661         if (!report->state) {
2662                 D_11H("Spectrum Measure Notification: Start\n");
2663                 return;
2664         }
2665
2666         memcpy(&il->measure_report, report, sizeof(*report));
2667         il->measurement_status |= MEASUREMENT_READY;
2668 }
2669 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2670
2671 /*
2672  * returns non-zero if packet should be dropped
2673  */
2674 int
2675 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2676                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2677 {
2678         u16 fc = le16_to_cpu(hdr->frame_control);
2679
2680         /*
2681          * All contexts have the same setting here due to it being
2682          * a module parameter, so OK to check any context.
2683          */
2684         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2685                 return 0;
2686
2687         if (!(fc & IEEE80211_FCTL_PROTECTED))
2688                 return 0;
2689
2690         D_RX("decrypt_res:0x%x\n", decrypt_res);
2691         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2692         case RX_RES_STATUS_SEC_TYPE_TKIP:
2693                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2694                  * Decryption will be done in SW. */
2695                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2696                     RX_RES_STATUS_BAD_KEY_TTAK)
2697                         break;
2698
2699         case RX_RES_STATUS_SEC_TYPE_WEP:
2700                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2701                     RX_RES_STATUS_BAD_ICV_MIC) {
2702                         /* bad ICV, the packet is destroyed since the
2703                          * decryption is inplace, drop it */
2704                         D_RX("Packet destroyed\n");
2705                         return -1;
2706                 }
2707         case RX_RES_STATUS_SEC_TYPE_CCMP:
2708                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2709                     RX_RES_STATUS_DECRYPT_OK) {
2710                         D_RX("hw decrypt successfully!!!\n");
2711                         stats->flag |= RX_FLAG_DECRYPTED;
2712                 }
2713                 break;
2714
2715         default:
2716                 break;
2717         }
2718         return 0;
2719 }
2720 EXPORT_SYMBOL(il_set_decrypted_flag);
2721
2722 /**
2723  * il_txq_update_write_ptr - Send new write idx to hardware
2724  */
2725 void
2726 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2727 {
2728         u32 reg = 0;
2729         int txq_id = txq->q.id;
2730
2731         if (txq->need_update == 0)
2732                 return;
2733
2734         /* if we're trying to save power */
2735         if (test_bit(S_POWER_PMI, &il->status)) {
2736                 /* wake up nic if it's powered down ...
2737                  * uCode will wake up, and interrupt us again, so next
2738                  * time we'll skip this part. */
2739                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2740
2741                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2742                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2743                                txq_id, reg);
2744                         il_set_bit(il, CSR_GP_CNTRL,
2745                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2746                         return;
2747                 }
2748
2749                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2750
2751                 /*
2752                  * else not in power-save mode,
2753                  * uCode will never sleep when we're
2754                  * trying to tx (during RFKILL, we're not trying to tx).
2755                  */
2756         } else
2757                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2758         txq->need_update = 0;
2759 }
2760 EXPORT_SYMBOL(il_txq_update_write_ptr);
2761
2762 /**
2763  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2764  */
2765 void
2766 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2767 {
2768         struct il_tx_queue *txq = &il->txq[txq_id];
2769         struct il_queue *q = &txq->q;
2770
2771         if (q->n_bd == 0)
2772                 return;
2773
2774         while (q->write_ptr != q->read_ptr) {
2775                 il->ops->txq_free_tfd(il, txq);
2776                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2777         }
2778 }
2779 EXPORT_SYMBOL(il_tx_queue_unmap);
2780
2781 /**
2782  * il_tx_queue_free - Deallocate DMA queue.
2783  * @txq: Transmit queue to deallocate.
2784  *
2785  * Empty queue by removing and destroying all BD's.
2786  * Free all buffers.
2787  * 0-fill, but do not free "txq" descriptor structure.
2788  */
2789 void
2790 il_tx_queue_free(struct il_priv *il, int txq_id)
2791 {
2792         struct il_tx_queue *txq = &il->txq[txq_id];
2793         struct device *dev = &il->pci_dev->dev;
2794         int i;
2795
2796         il_tx_queue_unmap(il, txq_id);
2797
2798         /* De-alloc array of command/tx buffers */
2799         if (txq->cmd) {
2800                 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2801                         kfree(txq->cmd[i]);
2802         }
2803
2804         /* De-alloc circular buffer of TFDs */
2805         if (txq->q.n_bd)
2806                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2807                                   txq->tfds, txq->q.dma_addr);
2808
2809         /* De-alloc array of per-TFD driver data */
2810         kfree(txq->skbs);
2811         txq->skbs = NULL;
2812
2813         /* deallocate arrays */
2814         kfree(txq->cmd);
2815         kfree(txq->meta);
2816         txq->cmd = NULL;
2817         txq->meta = NULL;
2818
2819         /* 0-fill queue descriptor structure */
2820         memset(txq, 0, sizeof(*txq));
2821 }
2822 EXPORT_SYMBOL(il_tx_queue_free);
2823
2824 /**
2825  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2826  */
2827 void
2828 il_cmd_queue_unmap(struct il_priv *il)
2829 {
2830         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2831         struct il_queue *q = &txq->q;
2832         int i;
2833
2834         if (q->n_bd == 0)
2835                 return;
2836
2837         while (q->read_ptr != q->write_ptr) {
2838                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2839
2840                 if (txq->meta[i].flags & CMD_MAPPED) {
2841                         pci_unmap_single(il->pci_dev,
2842                                          dma_unmap_addr(&txq->meta[i], mapping),
2843                                          dma_unmap_len(&txq->meta[i], len),
2844                                          PCI_DMA_BIDIRECTIONAL);
2845                         txq->meta[i].flags = 0;
2846                 }
2847
2848                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2849         }
2850
2851         i = q->n_win;
2852         if (txq->meta[i].flags & CMD_MAPPED) {
2853                 pci_unmap_single(il->pci_dev,
2854                                  dma_unmap_addr(&txq->meta[i], mapping),
2855                                  dma_unmap_len(&txq->meta[i], len),
2856                                  PCI_DMA_BIDIRECTIONAL);
2857                 txq->meta[i].flags = 0;
2858         }
2859 }
2860 EXPORT_SYMBOL(il_cmd_queue_unmap);
2861
2862 /**
2863  * il_cmd_queue_free - Deallocate DMA queue.
2864  * @txq: Transmit queue to deallocate.
2865  *
2866  * Empty queue by removing and destroying all BD's.
2867  * Free all buffers.
2868  * 0-fill, but do not free "txq" descriptor structure.
2869  */
2870 void
2871 il_cmd_queue_free(struct il_priv *il)
2872 {
2873         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2874         struct device *dev = &il->pci_dev->dev;
2875         int i;
2876
2877         il_cmd_queue_unmap(il);
2878
2879         /* De-alloc array of command/tx buffers */
2880         if (txq->cmd) {
2881                 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2882                         kfree(txq->cmd[i]);
2883         }
2884
2885         /* De-alloc circular buffer of TFDs */
2886         if (txq->q.n_bd)
2887                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2888                                   txq->tfds, txq->q.dma_addr);
2889
2890         /* deallocate arrays */
2891         kfree(txq->cmd);
2892         kfree(txq->meta);
2893         txq->cmd = NULL;
2894         txq->meta = NULL;
2895
2896         /* 0-fill queue descriptor structure */
2897         memset(txq, 0, sizeof(*txq));
2898 }
2899 EXPORT_SYMBOL(il_cmd_queue_free);
2900
2901 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2902  * DMA services
2903  *
2904  * Theory of operation
2905  *
2906  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2907  * of buffer descriptors, each of which points to one or more data buffers for
2908  * the device to read from or fill.  Driver and device exchange status of each
2909  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2910  * entries in each circular buffer, to protect against confusing empty and full
2911  * queue states.
2912  *
2913  * The device reads or writes the data in the queues via the device's several
2914  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2915  *
2916  * For Tx queue, there are low mark and high mark limits. If, after queuing
2917  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2918  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2919  * Tx queue resumed.
2920  *
2921  * See more detailed info in 4965.h.
2922  ***************************************************/
2923
2924 int
2925 il_queue_space(const struct il_queue *q)
2926 {
2927         int s = q->read_ptr - q->write_ptr;
2928
2929         if (q->read_ptr > q->write_ptr)
2930                 s -= q->n_bd;
2931
2932         if (s <= 0)
2933                 s += q->n_win;
2934         /* keep some reserve to not confuse empty and full situations */
2935         s -= 2;
2936         if (s < 0)
2937                 s = 0;
2938         return s;
2939 }
2940 EXPORT_SYMBOL(il_queue_space);
2941
2942
2943 /**
2944  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2945  */
2946 static int
2947 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2948 {
2949         /*
2950          * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2951          * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2952          */
2953         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2954         /* FIXME: remove q->n_bd */
2955         q->n_bd = TFD_QUEUE_SIZE_MAX;
2956
2957         q->n_win = slots;
2958         q->id = id;
2959
2960         /* slots_must be power-of-two size, otherwise
2961          * il_get_cmd_idx is broken. */
2962         BUG_ON(!is_power_of_2(slots));
2963
2964         q->low_mark = q->n_win / 4;
2965         if (q->low_mark < 4)
2966                 q->low_mark = 4;
2967
2968         q->high_mark = q->n_win / 8;
2969         if (q->high_mark < 2)
2970                 q->high_mark = 2;
2971
2972         q->write_ptr = q->read_ptr = 0;
2973
2974         return 0;
2975 }
2976
2977 /**
2978  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2979  */
2980 static int
2981 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2982 {
2983         struct device *dev = &il->pci_dev->dev;
2984         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2985
2986         /* Driver ilate data, only for Tx (not command) queues,
2987          * not shared with device. */
2988         if (id != il->cmd_queue) {
2989                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2990                                     sizeof(struct sk_buff *),
2991                                     GFP_KERNEL);
2992                 if (!txq->skbs) {
2993                         IL_ERR("Fail to alloc skbs\n");
2994                         goto error;
2995                 }
2996         } else
2997                 txq->skbs = NULL;
2998
2999         /* Circular buffer of transmit frame descriptors (TFDs),
3000          * shared with device */
3001         txq->tfds =
3002             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
3003         if (!txq->tfds)
3004                 goto error;
3005
3006         txq->q.id = id;
3007
3008         return 0;
3009
3010 error:
3011         kfree(txq->skbs);
3012         txq->skbs = NULL;
3013
3014         return -ENOMEM;
3015 }
3016
3017 /**
3018  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3019  */
3020 int
3021 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3022 {
3023         int i, len, ret;
3024         int slots, actual_slots;
3025         struct il_tx_queue *txq = &il->txq[txq_id];
3026
3027         /*
3028          * Alloc buffer array for commands (Tx or other types of commands).
3029          * For the command queue (#4/#9), allocate command space + one big
3030          * command for scan, since scan command is very huge; the system will
3031          * not have two scans at the same time, so only one is needed.
3032          * For normal Tx queues (all other queues), no super-size command
3033          * space is needed.
3034          */
3035         if (txq_id == il->cmd_queue) {
3036                 slots = TFD_CMD_SLOTS;
3037                 actual_slots = slots + 1;
3038         } else {
3039                 slots = TFD_TX_CMD_SLOTS;
3040                 actual_slots = slots;
3041         }
3042
3043         txq->meta =
3044             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
3045         txq->cmd =
3046             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
3047
3048         if (!txq->meta || !txq->cmd)
3049                 goto out_free_arrays;
3050
3051         len = sizeof(struct il_device_cmd);
3052         for (i = 0; i < actual_slots; i++) {
3053                 /* only happens for cmd queue */
3054                 if (i == slots)
3055                         len = IL_MAX_CMD_SIZE;
3056
3057                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3058                 if (!txq->cmd[i])
3059                         goto err;
3060         }
3061
3062         /* Alloc driver data array and TFD circular buffer */
3063         ret = il_tx_queue_alloc(il, txq, txq_id);
3064         if (ret)
3065                 goto err;
3066
3067         txq->need_update = 0;
3068
3069         /*
3070          * For the default queues 0-3, set up the swq_id
3071          * already -- all others need to get one later
3072          * (if they need one at all).
3073          */
3074         if (txq_id < 4)
3075                 il_set_swq_id(txq, txq_id, txq_id);
3076
3077         /* Initialize queue's high/low-water marks, and head/tail idxes */
3078         il_queue_init(il, &txq->q, slots, txq_id);
3079
3080         /* Tell device where to find queue */
3081         il->ops->txq_init(il, txq);
3082
3083         return 0;
3084 err:
3085         for (i = 0; i < actual_slots; i++)
3086                 kfree(txq->cmd[i]);
3087 out_free_arrays:
3088         kfree(txq->meta);
3089         txq->meta = NULL;
3090         kfree(txq->cmd);
3091         txq->cmd = NULL;
3092
3093         return -ENOMEM;
3094 }
3095 EXPORT_SYMBOL(il_tx_queue_init);
3096
3097 void
3098 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3099 {
3100         int slots, actual_slots;
3101         struct il_tx_queue *txq = &il->txq[txq_id];
3102
3103         if (txq_id == il->cmd_queue) {
3104                 slots = TFD_CMD_SLOTS;
3105                 actual_slots = TFD_CMD_SLOTS + 1;
3106         } else {
3107                 slots = TFD_TX_CMD_SLOTS;
3108                 actual_slots = TFD_TX_CMD_SLOTS;
3109         }
3110
3111         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3112         txq->need_update = 0;
3113
3114         /* Initialize queue's high/low-water marks, and head/tail idxes */
3115         il_queue_init(il, &txq->q, slots, txq_id);
3116
3117         /* Tell device where to find queue */
3118         il->ops->txq_init(il, txq);
3119 }
3120 EXPORT_SYMBOL(il_tx_queue_reset);
3121
3122 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3123
3124 /**
3125  * il_enqueue_hcmd - enqueue a uCode command
3126  * @il: device ilate data point
3127  * @cmd: a point to the ucode command structure
3128  *
3129  * The function returns < 0 values to indicate the operation is
3130  * failed. On success, it turns the idx (> 0) of command in the
3131  * command queue.
3132  */
3133 int
3134 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3135 {
3136         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3137         struct il_queue *q = &txq->q;
3138         struct il_device_cmd *out_cmd;
3139         struct il_cmd_meta *out_meta;
3140         dma_addr_t phys_addr;
3141         unsigned long flags;
3142         int len;
3143         u32 idx;
3144         u16 fix_size;
3145
3146         cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3147         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3148
3149         /* If any of the command structures end up being larger than
3150          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3151          * we will need to increase the size of the TFD entries
3152          * Also, check to see if command buffer should not exceed the size
3153          * of device_cmd and max_cmd_size. */
3154         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3155                !(cmd->flags & CMD_SIZE_HUGE));
3156         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3157
3158         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3159                 IL_WARN("Not sending command - %s KILL\n",
3160                         il_is_rfkill(il) ? "RF" : "CT");
3161                 return -EIO;
3162         }
3163
3164         spin_lock_irqsave(&il->hcmd_lock, flags);
3165
3166         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3167                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3168
3169                 IL_ERR("Restarting adapter due to command queue full\n");
3170                 queue_work(il->workqueue, &il->restart);
3171                 return -ENOSPC;
3172         }
3173
3174         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3175         out_cmd = txq->cmd[idx];
3176         out_meta = &txq->meta[idx];
3177
3178         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3179                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3180                 return -ENOSPC;
3181         }
3182
3183         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3184         out_meta->flags = cmd->flags | CMD_MAPPED;
3185         if (cmd->flags & CMD_WANT_SKB)
3186                 out_meta->source = cmd;
3187         if (cmd->flags & CMD_ASYNC)
3188                 out_meta->callback = cmd->callback;
3189
3190         out_cmd->hdr.cmd = cmd->id;
3191         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3192
3193         /* At this point, the out_cmd now has all of the incoming cmd
3194          * information */
3195
3196         out_cmd->hdr.flags = 0;
3197         out_cmd->hdr.sequence =
3198             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3199         if (cmd->flags & CMD_SIZE_HUGE)
3200                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3201         len = sizeof(struct il_device_cmd);
3202         if (idx == TFD_CMD_SLOTS)
3203                 len = IL_MAX_CMD_SIZE;
3204
3205 #ifdef CONFIG_IWLEGACY_DEBUG
3206         switch (out_cmd->hdr.cmd) {
3207         case C_TX_LINK_QUALITY_CMD:
3208         case C_SENSITIVITY:
3209                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3210                           "%d bytes at %d[%d]:%d\n",
3211                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3212                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3213                           q->write_ptr, idx, il->cmd_queue);
3214                 break;
3215         default:
3216                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3217                      "%d bytes at %d[%d]:%d\n",
3218                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3219                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3220                      idx, il->cmd_queue);
3221         }
3222 #endif
3223
3224         phys_addr =
3225             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3226                            PCI_DMA_BIDIRECTIONAL);
3227         if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3228                 idx = -ENOMEM;
3229                 goto out;
3230         }
3231         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3232         dma_unmap_len_set(out_meta, len, fix_size);
3233
3234         txq->need_update = 1;
3235
3236         if (il->ops->txq_update_byte_cnt_tbl)
3237                 /* Set up entry in queue's byte count circular buffer */
3238                 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3239
3240         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3241                                             U32_PAD(cmd->len));
3242
3243         /* Increment and update queue's write idx */
3244         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3245         il_txq_update_write_ptr(il, txq);
3246
3247 out:
3248         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3249         return idx;
3250 }
3251
3252 /**
3253  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3254  *
3255  * When FW advances 'R' idx, all entries between old and new 'R' idx
3256  * need to be reclaimed. As result, some free space forms.  If there is
3257  * enough free space (> low mark), wake the stack that feeds us.
3258  */
3259 static void
3260 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3261 {
3262         struct il_tx_queue *txq = &il->txq[txq_id];
3263         struct il_queue *q = &txq->q;
3264         int nfreed = 0;
3265
3266         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3267                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3268                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3269                        q->write_ptr, q->read_ptr);
3270                 return;
3271         }
3272
3273         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3274              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3275
3276                 if (nfreed++ > 0) {
3277                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3278                                q->write_ptr, q->read_ptr);
3279                         queue_work(il->workqueue, &il->restart);
3280                 }
3281
3282         }
3283 }
3284
3285 /**
3286  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3287  * @rxb: Rx buffer to reclaim
3288  *
3289  * If an Rx buffer has an async callback associated with it the callback
3290  * will be executed.  The attached skb (if present) will only be freed
3291  * if the callback returns 1
3292  */
3293 void
3294 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3295 {
3296         struct il_rx_pkt *pkt = rxb_addr(rxb);
3297         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3298         int txq_id = SEQ_TO_QUEUE(sequence);
3299         int idx = SEQ_TO_IDX(sequence);
3300         int cmd_idx;
3301         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3302         struct il_device_cmd *cmd;
3303         struct il_cmd_meta *meta;
3304         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3305         unsigned long flags;
3306
3307         /* If a Tx command is being handled and it isn't in the actual
3308          * command queue then there a command routing bug has been introduced
3309          * in the queue management code. */
3310         if (WARN
3311             (txq_id != il->cmd_queue,
3312              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3313              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3314              il->txq[il->cmd_queue].q.write_ptr)) {
3315                 il_print_hex_error(il, pkt, 32);
3316                 return;
3317         }
3318
3319         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3320         cmd = txq->cmd[cmd_idx];
3321         meta = &txq->meta[cmd_idx];
3322
3323         txq->time_stamp = jiffies;
3324
3325         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3326                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3327
3328         /* Input error checking is done when commands are added to queue. */
3329         if (meta->flags & CMD_WANT_SKB) {
3330                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3331                 rxb->page = NULL;
3332         } else if (meta->callback)
3333                 meta->callback(il, cmd, pkt);
3334
3335         spin_lock_irqsave(&il->hcmd_lock, flags);
3336
3337         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3338
3339         if (!(meta->flags & CMD_ASYNC)) {
3340                 clear_bit(S_HCMD_ACTIVE, &il->status);
3341                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3342                        il_get_cmd_string(cmd->hdr.cmd));
3343                 wake_up(&il->wait_command_queue);
3344         }
3345
3346         /* Mark as unmapped */
3347         meta->flags = 0;
3348
3349         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3350 }
3351 EXPORT_SYMBOL(il_tx_cmd_complete);
3352
3353 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3354 MODULE_VERSION(IWLWIFI_VERSION);
3355 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3356 MODULE_LICENSE("GPL");
3357
3358 /*
3359  * set bt_coex_active to true, uCode will do kill/defer
3360  * every time the priority line is asserted (BT is sending signals on the
3361  * priority line in the PCIx).
3362  * set bt_coex_active to false, uCode will ignore the BT activity and
3363  * perform the normal operation
3364  *
3365  * User might experience transmit issue on some platform due to WiFi/BT
3366  * co-exist problem. The possible behaviors are:
3367  *   Able to scan and finding all the available AP
3368  *   Not able to associate with any AP
3369  * On those platforms, WiFi communication can be restored by set
3370  * "bt_coex_active" module parameter to "false"
3371  *
3372  * default: bt_coex_active = true (BT_COEX_ENABLE)
3373  */
3374 static bool bt_coex_active = true;
3375 module_param(bt_coex_active, bool, S_IRUGO);
3376 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3377
3378 u32 il_debug_level;
3379 EXPORT_SYMBOL(il_debug_level);
3380
3381 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3382 EXPORT_SYMBOL(il_bcast_addr);
3383
3384 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3385 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3386 static void
3387 il_init_ht_hw_capab(const struct il_priv *il,
3388                     struct ieee80211_sta_ht_cap *ht_info,
3389                     enum nl80211_band band)
3390 {
3391         u16 max_bit_rate = 0;
3392         u8 rx_chains_num = il->hw_params.rx_chains_num;
3393         u8 tx_chains_num = il->hw_params.tx_chains_num;
3394
3395         ht_info->cap = 0;
3396         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3397
3398         ht_info->ht_supported = true;
3399
3400         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3401         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3402         if (il->hw_params.ht40_channel & BIT(band)) {
3403                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3404                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3405                 ht_info->mcs.rx_mask[4] = 0x01;
3406                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3407         }
3408
3409         if (il->cfg->mod_params->amsdu_size_8K)
3410                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3411
3412         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3413         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3414
3415         ht_info->mcs.rx_mask[0] = 0xFF;
3416         if (rx_chains_num >= 2)
3417                 ht_info->mcs.rx_mask[1] = 0xFF;
3418         if (rx_chains_num >= 3)
3419                 ht_info->mcs.rx_mask[2] = 0xFF;
3420
3421         /* Highest supported Rx data rate */
3422         max_bit_rate *= rx_chains_num;
3423         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3424         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3425
3426         /* Tx MCS capabilities */
3427         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3428         if (tx_chains_num != rx_chains_num) {
3429                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3430                 ht_info->mcs.tx_params |=
3431                     ((tx_chains_num -
3432                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3433         }
3434 }
3435
3436 /**
3437  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3438  */
3439 int
3440 il_init_geos(struct il_priv *il)
3441 {
3442         struct il_channel_info *ch;
3443         struct ieee80211_supported_band *sband;
3444         struct ieee80211_channel *channels;
3445         struct ieee80211_channel *geo_ch;
3446         struct ieee80211_rate *rates;
3447         int i = 0;
3448         s8 max_tx_power = 0;
3449
3450         if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3451             il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3452                 D_INFO("Geography modes already initialized.\n");
3453                 set_bit(S_GEO_CONFIGURED, &il->status);
3454                 return 0;
3455         }
3456
3457         channels =
3458             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3459                     GFP_KERNEL);
3460         if (!channels)
3461                 return -ENOMEM;
3462
3463         rates =
3464             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3465                     GFP_KERNEL);
3466         if (!rates) {
3467                 kfree(channels);
3468                 return -ENOMEM;
3469         }
3470
3471         /* 5.2GHz channels start after the 2.4GHz channels */
3472         sband = &il->bands[NL80211_BAND_5GHZ];
3473         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3474         /* just OFDM */
3475         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3476         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3477
3478         if (il->cfg->sku & IL_SKU_N)
3479                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3480
3481         sband = &il->bands[NL80211_BAND_2GHZ];
3482         sband->channels = channels;
3483         /* OFDM & CCK */
3484         sband->bitrates = rates;
3485         sband->n_bitrates = RATE_COUNT_LEGACY;
3486
3487         if (il->cfg->sku & IL_SKU_N)
3488                 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3489
3490         il->ieee_channels = channels;
3491         il->ieee_rates = rates;
3492
3493         for (i = 0; i < il->channel_count; i++) {
3494                 ch = &il->channel_info[i];
3495
3496                 if (!il_is_channel_valid(ch))
3497                         continue;
3498
3499                 sband = &il->bands[ch->band];
3500
3501                 geo_ch = &sband->channels[sband->n_channels++];
3502
3503                 geo_ch->center_freq =
3504                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3505                 geo_ch->max_power = ch->max_power_avg;
3506                 geo_ch->max_antenna_gain = 0xff;
3507                 geo_ch->hw_value = ch->channel;
3508
3509                 if (il_is_channel_valid(ch)) {
3510                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3511                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3512
3513                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3514                                 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3515
3516                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3517                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3518
3519                         geo_ch->flags |= ch->ht40_extension_channel;
3520
3521                         if (ch->max_power_avg > max_tx_power)
3522                                 max_tx_power = ch->max_power_avg;
3523                 } else {
3524                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3525                 }
3526
3527                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3528                        geo_ch->center_freq,
3529                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3530                        geo_ch->
3531                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3532                        geo_ch->flags);
3533         }
3534
3535         il->tx_power_device_lmt = max_tx_power;
3536         il->tx_power_user_lmt = max_tx_power;
3537         il->tx_power_next = max_tx_power;
3538
3539         if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3540             (il->cfg->sku & IL_SKU_A)) {
3541                 IL_INFO("Incorrectly detected BG card as ABG. "
3542                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3543                         il->pci_dev->device, il->pci_dev->subsystem_device);
3544                 il->cfg->sku &= ~IL_SKU_A;
3545         }
3546
3547         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3548                 il->bands[NL80211_BAND_2GHZ].n_channels,
3549                 il->bands[NL80211_BAND_5GHZ].n_channels);
3550
3551         set_bit(S_GEO_CONFIGURED, &il->status);
3552
3553         return 0;
3554 }
3555 EXPORT_SYMBOL(il_init_geos);
3556
3557 /*
3558  * il_free_geos - undo allocations in il_init_geos
3559  */
3560 void
3561 il_free_geos(struct il_priv *il)
3562 {
3563         kfree(il->ieee_channels);
3564         kfree(il->ieee_rates);
3565         clear_bit(S_GEO_CONFIGURED, &il->status);
3566 }
3567 EXPORT_SYMBOL(il_free_geos);
3568
3569 static bool
3570 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3571                         u16 channel, u8 extension_chan_offset)
3572 {
3573         const struct il_channel_info *ch_info;
3574
3575         ch_info = il_get_channel_info(il, band, channel);
3576         if (!il_is_channel_valid(ch_info))
3577                 return false;
3578
3579         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3580                 return !(ch_info->
3581                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3582         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3583                 return !(ch_info->
3584                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3585
3586         return false;
3587 }
3588
3589 bool
3590 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3591 {
3592         if (!il->ht.enabled || !il->ht.is_40mhz)
3593                 return false;
3594
3595         /*
3596          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3597          * the bit will not set if it is pure 40MHz case
3598          */
3599         if (ht_cap && !ht_cap->ht_supported)
3600                 return false;
3601
3602 #ifdef CONFIG_IWLEGACY_DEBUGFS
3603         if (il->disable_ht40)
3604                 return false;
3605 #endif
3606
3607         return il_is_channel_extension(il, il->band,
3608                                        le16_to_cpu(il->staging.channel),
3609                                        il->ht.extension_chan_offset);
3610 }
3611 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3612
3613 static u16 noinline
3614 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3615 {
3616         u16 new_val;
3617         u16 beacon_factor;
3618
3619         /*
3620          * If mac80211 hasn't given us a beacon interval, program
3621          * the default into the device.
3622          */
3623         if (!beacon_val)
3624                 return DEFAULT_BEACON_INTERVAL;
3625
3626         /*
3627          * If the beacon interval we obtained from the peer
3628          * is too large, we'll have to wake up more often
3629          * (and in IBSS case, we'll beacon too much)
3630          *
3631          * For example, if max_beacon_val is 4096, and the
3632          * requested beacon interval is 7000, we'll have to
3633          * use 3500 to be able to wake up on the beacons.
3634          *
3635          * This could badly influence beacon detection stats.
3636          */
3637
3638         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3639         new_val = beacon_val / beacon_factor;
3640
3641         if (!new_val)
3642                 new_val = max_beacon_val;
3643
3644         return new_val;
3645 }
3646
3647 int
3648 il_send_rxon_timing(struct il_priv *il)
3649 {
3650         u64 tsf;
3651         s32 interval_tm, rem;
3652         struct ieee80211_conf *conf = NULL;
3653         u16 beacon_int;
3654         struct ieee80211_vif *vif = il->vif;
3655
3656         conf = &il->hw->conf;
3657
3658         lockdep_assert_held(&il->mutex);
3659
3660         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3661
3662         il->timing.timestamp = cpu_to_le64(il->timestamp);
3663         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3664
3665         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3666
3667         /*
3668          * TODO: For IBSS we need to get atim_win from mac80211,
3669          *       for now just always use 0
3670          */
3671         il->timing.atim_win = 0;
3672
3673         beacon_int =
3674             il_adjust_beacon_interval(beacon_int,
3675                                       il->hw_params.max_beacon_itrvl *
3676                                       TIME_UNIT);
3677         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3678
3679         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3680         interval_tm = beacon_int * TIME_UNIT;
3681         rem = do_div(tsf, interval_tm);
3682         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3683
3684         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3685
3686         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3687                 le16_to_cpu(il->timing.beacon_interval),
3688                 le32_to_cpu(il->timing.beacon_init_val),
3689                 le16_to_cpu(il->timing.atim_win));
3690
3691         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3692                                &il->timing);
3693 }
3694 EXPORT_SYMBOL(il_send_rxon_timing);
3695
3696 void
3697 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3698 {
3699         struct il_rxon_cmd *rxon = &il->staging;
3700
3701         if (hw_decrypt)
3702                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3703         else
3704                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3705
3706 }
3707 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3708
3709 /* validate RXON structure is valid */
3710 int
3711 il_check_rxon_cmd(struct il_priv *il)
3712 {
3713         struct il_rxon_cmd *rxon = &il->staging;
3714         bool error = false;
3715
3716         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3717                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3718                         IL_WARN("check 2.4G: wrong narrow\n");
3719                         error = true;
3720                 }
3721                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3722                         IL_WARN("check 2.4G: wrong radar\n");
3723                         error = true;
3724                 }
3725         } else {
3726                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3727                         IL_WARN("check 5.2G: not short slot!\n");
3728                         error = true;
3729                 }
3730                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3731                         IL_WARN("check 5.2G: CCK!\n");
3732                         error = true;
3733                 }
3734         }
3735         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3736                 IL_WARN("mac/bssid mcast!\n");
3737                 error = true;
3738         }
3739
3740         /* make sure basic rates 6Mbps and 1Mbps are supported */
3741         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3742             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3743                 IL_WARN("neither 1 nor 6 are basic\n");
3744                 error = true;
3745         }
3746
3747         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3748                 IL_WARN("aid > 2007\n");
3749                 error = true;
3750         }
3751
3752         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3753             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3754                 IL_WARN("CCK and short slot\n");
3755                 error = true;
3756         }
3757
3758         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3759             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3760                 IL_WARN("CCK and auto detect");
3761                 error = true;
3762         }
3763
3764         if ((rxon->
3765              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3766             RXON_FLG_TGG_PROTECT_MSK) {
3767                 IL_WARN("TGg but no auto-detect\n");
3768                 error = true;
3769         }
3770
3771         if (error)
3772                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3773
3774         if (error) {
3775                 IL_ERR("Invalid RXON\n");
3776                 return -EINVAL;
3777         }
3778         return 0;
3779 }
3780 EXPORT_SYMBOL(il_check_rxon_cmd);
3781
3782 /**
3783  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3784  * @il: staging_rxon is compared to active_rxon
3785  *
3786  * If the RXON structure is changing enough to require a new tune,
3787  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3788  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3789  */
3790 int
3791 il_full_rxon_required(struct il_priv *il)
3792 {
3793         const struct il_rxon_cmd *staging = &il->staging;
3794         const struct il_rxon_cmd *active = &il->active;
3795
3796 #define CHK(cond)                                                       \
3797         if ((cond)) {                                                   \
3798                 D_INFO("need full RXON - " #cond "\n"); \
3799                 return 1;                                               \
3800         }
3801
3802 #define CHK_NEQ(c1, c2)                                         \
3803         if ((c1) != (c2)) {                                     \
3804                 D_INFO("need full RXON - "      \
3805                                #c1 " != " #c2 " - %d != %d\n",  \
3806                                (c1), (c2));                     \
3807                 return 1;                                       \
3808         }
3809
3810         /* These items are only settable from the full RXON command */
3811         CHK(!il_is_associated(il));
3812         CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3813         CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3814         CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3815                                      active->wlap_bssid_addr));
3816         CHK_NEQ(staging->dev_type, active->dev_type);
3817         CHK_NEQ(staging->channel, active->channel);
3818         CHK_NEQ(staging->air_propagation, active->air_propagation);
3819         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3820                 active->ofdm_ht_single_stream_basic_rates);
3821         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3822                 active->ofdm_ht_dual_stream_basic_rates);
3823         CHK_NEQ(staging->assoc_id, active->assoc_id);
3824
3825         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3826          * be updated with the RXON_ASSOC command -- however only some
3827          * flag transitions are allowed using RXON_ASSOC */
3828
3829         /* Check if we are not switching bands */
3830         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3831                 active->flags & RXON_FLG_BAND_24G_MSK);
3832
3833         /* Check if we are switching association toggle */
3834         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3835                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3836
3837 #undef CHK
3838 #undef CHK_NEQ
3839
3840         return 0;
3841 }
3842 EXPORT_SYMBOL(il_full_rxon_required);
3843
3844 u8
3845 il_get_lowest_plcp(struct il_priv *il)
3846 {
3847         /*
3848          * Assign the lowest rate -- should really get this from
3849          * the beacon skb from mac80211.
3850          */
3851         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3852                 return RATE_1M_PLCP;
3853         else
3854                 return RATE_6M_PLCP;
3855 }
3856 EXPORT_SYMBOL(il_get_lowest_plcp);
3857
3858 static void
3859 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3860 {
3861         struct il_rxon_cmd *rxon = &il->staging;
3862
3863         if (!il->ht.enabled) {
3864                 rxon->flags &=
3865                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3866                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3867                       | RXON_FLG_HT_PROT_MSK);
3868                 return;
3869         }
3870
3871         rxon->flags |=
3872             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3873
3874         /* Set up channel bandwidth:
3875          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3876         /* clear the HT channel mode before set the mode */
3877         rxon->flags &=
3878             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3879         if (il_is_ht40_tx_allowed(il, NULL)) {
3880                 /* pure ht40 */
3881                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3882                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3883                         /* Note: control channel is opposite of extension channel */
3884                         switch (il->ht.extension_chan_offset) {
3885                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3886                                 rxon->flags &=
3887                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3888                                 break;
3889                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3890                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3891                                 break;
3892                         }
3893                 } else {
3894                         /* Note: control channel is opposite of extension channel */
3895                         switch (il->ht.extension_chan_offset) {
3896                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3897                                 rxon->flags &=
3898                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3899                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3900                                 break;
3901                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3902                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3903                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3904                                 break;
3905                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3906                         default:
3907                                 /* channel location only valid if in Mixed mode */
3908                                 IL_ERR("invalid extension channel offset\n");
3909                                 break;
3910                         }
3911                 }
3912         } else {
3913                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3914         }
3915
3916         if (il->ops->set_rxon_chain)
3917                 il->ops->set_rxon_chain(il);
3918
3919         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3920                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3921                 il->ht.protection, il->ht.extension_chan_offset);
3922 }
3923
3924 void
3925 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3926 {
3927         _il_set_rxon_ht(il, ht_conf);
3928 }
3929 EXPORT_SYMBOL(il_set_rxon_ht);
3930
3931 /* Return valid, unused, channel for a passive scan to reset the RF */
3932 u8
3933 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3934 {
3935         const struct il_channel_info *ch_info;
3936         int i;
3937         u8 channel = 0;
3938         u8 min, max;
3939
3940         if (band == NL80211_BAND_5GHZ) {
3941                 min = 14;
3942                 max = il->channel_count;
3943         } else {
3944                 min = 0;
3945                 max = 14;
3946         }
3947
3948         for (i = min; i < max; i++) {
3949                 channel = il->channel_info[i].channel;
3950                 if (channel == le16_to_cpu(il->staging.channel))
3951                         continue;
3952
3953                 ch_info = il_get_channel_info(il, band, channel);
3954                 if (il_is_channel_valid(ch_info))
3955                         break;
3956         }
3957
3958         return channel;
3959 }
3960 EXPORT_SYMBOL(il_get_single_channel_number);
3961
3962 /**
3963  * il_set_rxon_channel - Set the band and channel values in staging RXON
3964  * @ch: requested channel as a pointer to struct ieee80211_channel
3965
3966  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3967  * in the staging RXON flag structure based on the ch->band
3968  */
3969 int
3970 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3971 {
3972         enum nl80211_band band = ch->band;
3973         u16 channel = ch->hw_value;
3974
3975         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3976                 return 0;
3977
3978         il->staging.channel = cpu_to_le16(channel);
3979         if (band == NL80211_BAND_5GHZ)
3980                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3981         else
3982                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3983
3984         il->band = band;
3985
3986         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3987
3988         return 0;
3989 }
3990 EXPORT_SYMBOL(il_set_rxon_channel);
3991
3992 void
3993 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3994                       struct ieee80211_vif *vif)
3995 {
3996         if (band == NL80211_BAND_5GHZ) {
3997                 il->staging.flags &=
3998                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3999                       RXON_FLG_CCK_MSK);
4000                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
4001         } else {
4002                 /* Copied from il_post_associate() */
4003                 if (vif && vif->bss_conf.use_short_slot)
4004                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
4005                 else
4006                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4007
4008                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
4009                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
4010                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
4011         }
4012 }
4013 EXPORT_SYMBOL(il_set_flags_for_band);
4014
4015 /*
4016  * initialize rxon structure with default values from eeprom
4017  */
4018 void
4019 il_connection_init_rx_config(struct il_priv *il)
4020 {
4021         const struct il_channel_info *ch_info;
4022
4023         memset(&il->staging, 0, sizeof(il->staging));
4024
4025         switch (il->iw_mode) {
4026         case NL80211_IFTYPE_UNSPECIFIED:
4027                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4028                 break;
4029         case NL80211_IFTYPE_STATION:
4030                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4031                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4032                 break;
4033         case NL80211_IFTYPE_ADHOC:
4034                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4035                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4036                 il->staging.filter_flags =
4037                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4038                 break;
4039         default:
4040                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4041                 return;
4042         }
4043
4044 #if 0
4045         /* TODO:  Figure out when short_preamble would be set and cache from
4046          * that */
4047         if (!hw_to_local(il->hw)->short_preamble)
4048                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4049         else
4050                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4051 #endif
4052
4053         ch_info =
4054             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4055
4056         if (!ch_info)
4057                 ch_info = &il->channel_info[0];
4058
4059         il->staging.channel = cpu_to_le16(ch_info->channel);
4060         il->band = ch_info->band;
4061
4062         il_set_flags_for_band(il, il->band, il->vif);
4063
4064         il->staging.ofdm_basic_rates =
4065             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4066         il->staging.cck_basic_rates =
4067             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4068
4069         /* clear both MIX and PURE40 mode flag */
4070         il->staging.flags &=
4071             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4072         if (il->vif)
4073                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4074
4075         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4076         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4077 }
4078 EXPORT_SYMBOL(il_connection_init_rx_config);
4079
4080 void
4081 il_set_rate(struct il_priv *il)
4082 {
4083         const struct ieee80211_supported_band *hw = NULL;
4084         struct ieee80211_rate *rate;
4085         int i;
4086
4087         hw = il_get_hw_mode(il, il->band);
4088         if (!hw) {
4089                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4090                 return;
4091         }
4092
4093         il->active_rate = 0;
4094
4095         for (i = 0; i < hw->n_bitrates; i++) {
4096                 rate = &(hw->bitrates[i]);
4097                 if (rate->hw_value < RATE_COUNT_LEGACY)
4098                         il->active_rate |= (1 << rate->hw_value);
4099         }
4100
4101         D_RATE("Set active_rate = %0x\n", il->active_rate);
4102
4103         il->staging.cck_basic_rates =
4104             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4105
4106         il->staging.ofdm_basic_rates =
4107             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4108 }
4109 EXPORT_SYMBOL(il_set_rate);
4110
4111 void
4112 il_chswitch_done(struct il_priv *il, bool is_success)
4113 {
4114         if (test_bit(S_EXIT_PENDING, &il->status))
4115                 return;
4116
4117         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4118                 ieee80211_chswitch_done(il->vif, is_success);
4119 }
4120 EXPORT_SYMBOL(il_chswitch_done);
4121
4122 void
4123 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4124 {
4125         struct il_rx_pkt *pkt = rxb_addr(rxb);
4126         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4127         struct il_rxon_cmd *rxon = (void *)&il->active;
4128
4129         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4130                 return;
4131
4132         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4133                 rxon->channel = csa->channel;
4134                 il->staging.channel = csa->channel;
4135                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4136                 il_chswitch_done(il, true);
4137         } else {
4138                 IL_ERR("CSA notif (fail) : channel %d\n",
4139                        le16_to_cpu(csa->channel));
4140                 il_chswitch_done(il, false);
4141         }
4142 }
4143 EXPORT_SYMBOL(il_hdl_csa);
4144
4145 #ifdef CONFIG_IWLEGACY_DEBUG
4146 void
4147 il_print_rx_config_cmd(struct il_priv *il)
4148 {
4149         struct il_rxon_cmd *rxon = &il->staging;
4150
4151         D_RADIO("RX CONFIG:\n");
4152         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4153         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4154         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4155         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4156         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4157         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4158         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4159         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4160         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4161         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4162 }
4163 EXPORT_SYMBOL(il_print_rx_config_cmd);
4164 #endif
4165 /**
4166  * il_irq_handle_error - called for HW or SW error interrupt from card
4167  */
4168 void
4169 il_irq_handle_error(struct il_priv *il)
4170 {
4171         /* Set the FW error flag -- cleared on il_down */
4172         set_bit(S_FW_ERROR, &il->status);
4173
4174         /* Cancel currently queued command. */
4175         clear_bit(S_HCMD_ACTIVE, &il->status);
4176
4177         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4178
4179         il->ops->dump_nic_error_log(il);
4180         if (il->ops->dump_fh)
4181                 il->ops->dump_fh(il, NULL, false);
4182 #ifdef CONFIG_IWLEGACY_DEBUG
4183         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4184                 il_print_rx_config_cmd(il);
4185 #endif
4186
4187         wake_up(&il->wait_command_queue);
4188
4189         /* Keep the restart process from trying to send host
4190          * commands by clearing the INIT status bit */
4191         clear_bit(S_READY, &il->status);
4192
4193         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4194                 IL_DBG(IL_DL_FW_ERRORS,
4195                        "Restarting adapter due to uCode error.\n");
4196
4197                 if (il->cfg->mod_params->restart_fw)
4198                         queue_work(il->workqueue, &il->restart);
4199         }
4200 }
4201 EXPORT_SYMBOL(il_irq_handle_error);
4202
4203 static int
4204 _il_apm_stop_master(struct il_priv *il)
4205 {
4206         int ret = 0;
4207
4208         /* stop device's busmaster DMA activity */
4209         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4210
4211         ret =
4212             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4213                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4214         if (ret < 0)
4215                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4216
4217         D_INFO("stop master\n");
4218
4219         return ret;
4220 }
4221
4222 void
4223 _il_apm_stop(struct il_priv *il)
4224 {
4225         lockdep_assert_held(&il->reg_lock);
4226
4227         D_INFO("Stop card, put in low power state\n");
4228
4229         /* Stop device's DMA activity */
4230         _il_apm_stop_master(il);
4231
4232         /* Reset the entire device */
4233         _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4234
4235         udelay(10);
4236
4237         /*
4238          * Clear "initialization complete" bit to move adapter from
4239          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4240          */
4241         _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4242 }
4243 EXPORT_SYMBOL(_il_apm_stop);
4244
4245 void
4246 il_apm_stop(struct il_priv *il)
4247 {
4248         unsigned long flags;
4249
4250         spin_lock_irqsave(&il->reg_lock, flags);
4251         _il_apm_stop(il);
4252         spin_unlock_irqrestore(&il->reg_lock, flags);
4253 }
4254 EXPORT_SYMBOL(il_apm_stop);
4255
4256 /*
4257  * Start up NIC's basic functionality after it has been reset
4258  * (e.g. after platform boot, or shutdown via il_apm_stop())
4259  * NOTE:  This does not load uCode nor start the embedded processor
4260  */
4261 int
4262 il_apm_init(struct il_priv *il)
4263 {
4264         int ret = 0;
4265         u16 lctl;
4266
4267         D_INFO("Init card's basic functions\n");
4268
4269         /*
4270          * Use "set_bit" below rather than "write", to preserve any hardware
4271          * bits already set by default after reset.
4272          */
4273
4274         /* Disable L0S exit timer (platform NMI Work/Around) */
4275         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4276                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4277
4278         /*
4279          * Disable L0s without affecting L1;
4280          *  don't wait for ICH L0s (ICH bug W/A)
4281          */
4282         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4283                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4284
4285         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4286         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4287
4288         /*
4289          * Enable HAP INTA (interrupt from management bus) to
4290          * wake device's PCI Express link L1a -> L0s
4291          * NOTE:  This is no-op for 3945 (non-existent bit)
4292          */
4293         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4294                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4295
4296         /*
4297          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4298          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4299          * If so (likely), disable L0S, so device moves directly L0->L1;
4300          *    costs negligible amount of power savings.
4301          * If not (unlikely), enable L0S, so there is at least some
4302          *    power savings, even without L1.
4303          */
4304         if (il->cfg->set_l0s) {
4305                 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4306                 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4307                         /* L1-ASPM enabled; disable(!) L0S  */
4308                         il_set_bit(il, CSR_GIO_REG,
4309                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4310                         D_POWER("L1 Enabled; Disabling L0S\n");
4311                 } else {
4312                         /* L1-ASPM disabled; enable(!) L0S */
4313                         il_clear_bit(il, CSR_GIO_REG,
4314                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4315                         D_POWER("L1 Disabled; Enabling L0S\n");
4316                 }
4317         }
4318
4319         /* Configure analog phase-lock-loop before activating to D0A */
4320         if (il->cfg->pll_cfg_val)
4321                 il_set_bit(il, CSR_ANA_PLL_CFG,
4322                            il->cfg->pll_cfg_val);
4323
4324         /*
4325          * Set "initialization complete" bit to move adapter from
4326          * D0U* --> D0A* (powered-up active) state.
4327          */
4328         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4329
4330         /*
4331          * Wait for clock stabilization; once stabilized, access to
4332          * device-internal resources is supported, e.g. il_wr_prph()
4333          * and accesses to uCode SRAM.
4334          */
4335         ret =
4336             _il_poll_bit(il, CSR_GP_CNTRL,
4337                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4338                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4339         if (ret < 0) {
4340                 D_INFO("Failed to init the card\n");
4341                 goto out;
4342         }
4343
4344         /*
4345          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4346          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4347          *
4348          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4349          * do not disable clocks.  This preserves any hardware bits already
4350          * set by default in "CLK_CTRL_REG" after reset.
4351          */
4352         if (il->cfg->use_bsm)
4353                 il_wr_prph(il, APMG_CLK_EN_REG,
4354                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4355         else
4356                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4357         udelay(20);
4358
4359         /* Disable L1-Active */
4360         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4361                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4362
4363 out:
4364         return ret;
4365 }
4366 EXPORT_SYMBOL(il_apm_init);
4367
4368 int
4369 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4370 {
4371         int ret;
4372         s8 prev_tx_power;
4373         bool defer;
4374
4375         lockdep_assert_held(&il->mutex);
4376
4377         if (il->tx_power_user_lmt == tx_power && !force)
4378                 return 0;
4379
4380         if (!il->ops->send_tx_power)
4381                 return -EOPNOTSUPP;
4382
4383         /* 0 dBm mean 1 milliwatt */
4384         if (tx_power < 0) {
4385                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4386                 return -EINVAL;
4387         }
4388
4389         if (tx_power > il->tx_power_device_lmt) {
4390                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4391                         tx_power, il->tx_power_device_lmt);
4392                 return -EINVAL;
4393         }
4394
4395         if (!il_is_ready_rf(il))
4396                 return -EIO;
4397
4398         /* scan complete and commit_rxon use tx_power_next value,
4399          * it always need to be updated for newest request */
4400         il->tx_power_next = tx_power;
4401
4402         /* do not set tx power when scanning or channel changing */
4403         defer = test_bit(S_SCANNING, &il->status) ||
4404             memcmp(&il->active, &il->staging, sizeof(il->staging));
4405         if (defer && !force) {
4406                 D_INFO("Deferring tx power set\n");
4407                 return 0;
4408         }
4409
4410         prev_tx_power = il->tx_power_user_lmt;
4411         il->tx_power_user_lmt = tx_power;
4412
4413         ret = il->ops->send_tx_power(il);
4414
4415         /* if fail to set tx_power, restore the orig. tx power */
4416         if (ret) {
4417                 il->tx_power_user_lmt = prev_tx_power;
4418                 il->tx_power_next = prev_tx_power;
4419         }
4420         return ret;
4421 }
4422 EXPORT_SYMBOL(il_set_tx_power);
4423
4424 void
4425 il_send_bt_config(struct il_priv *il)
4426 {
4427         struct il_bt_cmd bt_cmd = {
4428                 .lead_time = BT_LEAD_TIME_DEF,
4429                 .max_kill = BT_MAX_KILL_DEF,
4430                 .kill_ack_mask = 0,
4431                 .kill_cts_mask = 0,
4432         };
4433
4434         if (!bt_coex_active)
4435                 bt_cmd.flags = BT_COEX_DISABLE;
4436         else
4437                 bt_cmd.flags = BT_COEX_ENABLE;
4438
4439         D_INFO("BT coex %s\n",
4440                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4441
4442         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4443                 IL_ERR("failed to send BT Coex Config\n");
4444 }
4445 EXPORT_SYMBOL(il_send_bt_config);
4446
4447 int
4448 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4449 {
4450         struct il_stats_cmd stats_cmd = {
4451                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4452         };
4453
4454         if (flags & CMD_ASYNC)
4455                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4456                                              &stats_cmd, NULL);
4457         else
4458                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4459                                        &stats_cmd);
4460 }
4461 EXPORT_SYMBOL(il_send_stats_request);
4462
4463 void
4464 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4465 {
4466 #ifdef CONFIG_IWLEGACY_DEBUG
4467         struct il_rx_pkt *pkt = rxb_addr(rxb);
4468         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4469         D_RX("sleep mode: %d, src: %d\n",
4470              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4471 #endif
4472 }
4473 EXPORT_SYMBOL(il_hdl_pm_sleep);
4474
4475 void
4476 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4477 {
4478         struct il_rx_pkt *pkt = rxb_addr(rxb);
4479         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4480         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4481                 il_get_cmd_string(pkt->hdr.cmd));
4482         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4483 }
4484 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4485
4486 void
4487 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4488 {
4489         struct il_rx_pkt *pkt = rxb_addr(rxb);
4490
4491         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4492                "seq 0x%04X ser 0x%08X\n",
4493                le32_to_cpu(pkt->u.err_resp.error_type),
4494                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4495                pkt->u.err_resp.cmd_id,
4496                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4497                le32_to_cpu(pkt->u.err_resp.error_info));
4498 }
4499 EXPORT_SYMBOL(il_hdl_error);
4500
4501 void
4502 il_clear_isr_stats(struct il_priv *il)
4503 {
4504         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4505 }
4506
4507 int
4508 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4509                const struct ieee80211_tx_queue_params *params)
4510 {
4511         struct il_priv *il = hw->priv;
4512         unsigned long flags;
4513         int q;
4514
4515         D_MAC80211("enter\n");
4516
4517         if (!il_is_ready_rf(il)) {
4518                 D_MAC80211("leave - RF not ready\n");
4519                 return -EIO;
4520         }
4521
4522         if (queue >= AC_NUM) {
4523                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4524                 return 0;
4525         }
4526
4527         q = AC_NUM - 1 - queue;
4528
4529         spin_lock_irqsave(&il->lock, flags);
4530
4531         il->qos_data.def_qos_parm.ac[q].cw_min =
4532             cpu_to_le16(params->cw_min);
4533         il->qos_data.def_qos_parm.ac[q].cw_max =
4534             cpu_to_le16(params->cw_max);
4535         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4536         il->qos_data.def_qos_parm.ac[q].edca_txop =
4537             cpu_to_le16((params->txop * 32));
4538
4539         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4540
4541         spin_unlock_irqrestore(&il->lock, flags);
4542
4543         D_MAC80211("leave\n");
4544         return 0;
4545 }
4546 EXPORT_SYMBOL(il_mac_conf_tx);
4547
4548 int
4549 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4550 {
4551         struct il_priv *il = hw->priv;
4552         int ret;
4553
4554         D_MAC80211("enter\n");
4555
4556         ret = (il->ibss_manager == IL_IBSS_MANAGER);
4557
4558         D_MAC80211("leave ret %d\n", ret);
4559         return ret;
4560 }
4561 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4562
4563 static int
4564 il_set_mode(struct il_priv *il)
4565 {
4566         il_connection_init_rx_config(il);
4567
4568         if (il->ops->set_rxon_chain)
4569                 il->ops->set_rxon_chain(il);
4570
4571         return il_commit_rxon(il);
4572 }
4573
4574 int
4575 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4576 {
4577         struct il_priv *il = hw->priv;
4578         int err;
4579         bool reset;
4580
4581         mutex_lock(&il->mutex);
4582         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4583
4584         if (!il_is_ready_rf(il)) {
4585                 IL_WARN("Try to add interface when device not ready\n");
4586                 err = -EINVAL;
4587                 goto out;
4588         }
4589
4590         /*
4591          * We do not support multiple virtual interfaces, but on hardware reset
4592          * we have to add the same interface again.
4593          */
4594         reset = (il->vif == vif);
4595         if (il->vif && !reset) {
4596                 err = -EOPNOTSUPP;
4597                 goto out;
4598         }
4599
4600         il->vif = vif;
4601         il->iw_mode = vif->type;
4602
4603         err = il_set_mode(il);
4604         if (err) {
4605                 IL_WARN("Fail to set mode %d\n", vif->type);
4606                 if (!reset) {
4607                         il->vif = NULL;
4608                         il->iw_mode = NL80211_IFTYPE_STATION;
4609                 }
4610         }
4611
4612 out:
4613         D_MAC80211("leave err %d\n", err);
4614         mutex_unlock(&il->mutex);
4615
4616         return err;
4617 }
4618 EXPORT_SYMBOL(il_mac_add_interface);
4619
4620 static void
4621 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4622 {
4623         lockdep_assert_held(&il->mutex);
4624
4625         if (il->scan_vif == vif) {
4626                 il_scan_cancel_timeout(il, 200);
4627                 il_force_scan_end(il);
4628         }
4629
4630         il_set_mode(il);
4631 }
4632
4633 void
4634 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4635 {
4636         struct il_priv *il = hw->priv;
4637
4638         mutex_lock(&il->mutex);
4639         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4640
4641         WARN_ON(il->vif != vif);
4642         il->vif = NULL;
4643         il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4644         il_teardown_interface(il, vif);
4645         eth_zero_addr(il->bssid);
4646
4647         D_MAC80211("leave\n");
4648         mutex_unlock(&il->mutex);
4649 }
4650 EXPORT_SYMBOL(il_mac_remove_interface);
4651
4652 int
4653 il_alloc_txq_mem(struct il_priv *il)
4654 {
4655         if (!il->txq)
4656                 il->txq =
4657                     kzalloc(sizeof(struct il_tx_queue) *
4658                             il->cfg->num_of_queues, GFP_KERNEL);
4659         if (!il->txq) {
4660                 IL_ERR("Not enough memory for txq\n");
4661                 return -ENOMEM;
4662         }
4663         return 0;
4664 }
4665 EXPORT_SYMBOL(il_alloc_txq_mem);
4666
4667 void
4668 il_free_txq_mem(struct il_priv *il)
4669 {
4670         kfree(il->txq);
4671         il->txq = NULL;
4672 }
4673 EXPORT_SYMBOL(il_free_txq_mem);
4674
4675 int
4676 il_force_reset(struct il_priv *il, bool external)
4677 {
4678         struct il_force_reset *force_reset;
4679
4680         if (test_bit(S_EXIT_PENDING, &il->status))
4681                 return -EINVAL;
4682
4683         force_reset = &il->force_reset;
4684         force_reset->reset_request_count++;
4685         if (!external) {
4686                 if (force_reset->last_force_reset_jiffies &&
4687                     time_after(force_reset->last_force_reset_jiffies +
4688                                force_reset->reset_duration, jiffies)) {
4689                         D_INFO("force reset rejected\n");
4690                         force_reset->reset_reject_count++;
4691                         return -EAGAIN;
4692                 }
4693         }
4694         force_reset->reset_success_count++;
4695         force_reset->last_force_reset_jiffies = jiffies;
4696
4697         /*
4698          * if the request is from external(ex: debugfs),
4699          * then always perform the request in regardless the module
4700          * parameter setting
4701          * if the request is from internal (uCode error or driver
4702          * detect failure), then fw_restart module parameter
4703          * need to be check before performing firmware reload
4704          */
4705
4706         if (!external && !il->cfg->mod_params->restart_fw) {
4707                 D_INFO("Cancel firmware reload based on "
4708                        "module parameter setting\n");
4709                 return 0;
4710         }
4711
4712         IL_ERR("On demand firmware reload\n");
4713
4714         /* Set the FW error flag -- cleared on il_down */
4715         set_bit(S_FW_ERROR, &il->status);
4716         wake_up(&il->wait_command_queue);
4717         /*
4718          * Keep the restart process from trying to send host
4719          * commands by clearing the INIT status bit
4720          */
4721         clear_bit(S_READY, &il->status);
4722         queue_work(il->workqueue, &il->restart);
4723
4724         return 0;
4725 }
4726 EXPORT_SYMBOL(il_force_reset);
4727
4728 int
4729 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4730                         enum nl80211_iftype newtype, bool newp2p)
4731 {
4732         struct il_priv *il = hw->priv;
4733         int err;
4734
4735         mutex_lock(&il->mutex);
4736         D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4737                     vif->type, vif->addr, newtype, newp2p);
4738
4739         if (newp2p) {
4740                 err = -EOPNOTSUPP;
4741                 goto out;
4742         }
4743
4744         if (!il->vif || !il_is_ready_rf(il)) {
4745                 /*
4746                  * Huh? But wait ... this can maybe happen when
4747                  * we're in the middle of a firmware restart!
4748                  */
4749                 err = -EBUSY;
4750                 goto out;
4751         }
4752
4753         /* success */
4754         vif->type = newtype;
4755         vif->p2p = false;
4756         il->iw_mode = newtype;
4757         il_teardown_interface(il, vif);
4758         err = 0;
4759
4760 out:
4761         D_MAC80211("leave err %d\n", err);
4762         mutex_unlock(&il->mutex);
4763
4764         return err;
4765 }
4766 EXPORT_SYMBOL(il_mac_change_interface);
4767
4768 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4769                   u32 queues, bool drop)
4770 {
4771         struct il_priv *il = hw->priv;
4772         unsigned long timeout = jiffies + msecs_to_jiffies(500);
4773         int i;
4774
4775         mutex_lock(&il->mutex);
4776         D_MAC80211("enter\n");
4777
4778         if (il->txq == NULL)
4779                 goto out;
4780
4781         for (i = 0; i < il->hw_params.max_txq_num; i++) {
4782                 struct il_queue *q;
4783
4784                 if (i == il->cmd_queue)
4785                         continue;
4786
4787                 q = &il->txq[i].q;
4788                 if (q->read_ptr == q->write_ptr)
4789                         continue;
4790
4791                 if (time_after(jiffies, timeout)) {
4792                         IL_ERR("Failed to flush queue %d\n", q->id);
4793                         break;
4794                 }
4795
4796                 msleep(20);
4797         }
4798 out:
4799         D_MAC80211("leave\n");
4800         mutex_unlock(&il->mutex);
4801 }
4802 EXPORT_SYMBOL(il_mac_flush);
4803
4804 /*
4805  * On every watchdog tick we check (latest) time stamp. If it does not
4806  * change during timeout period and queue is not empty we reset firmware.
4807  */
4808 static int
4809 il_check_stuck_queue(struct il_priv *il, int cnt)
4810 {
4811         struct il_tx_queue *txq = &il->txq[cnt];
4812         struct il_queue *q = &txq->q;
4813         unsigned long timeout;
4814         unsigned long now = jiffies;
4815         int ret;
4816
4817         if (q->read_ptr == q->write_ptr) {
4818                 txq->time_stamp = now;
4819                 return 0;
4820         }
4821
4822         timeout =
4823             txq->time_stamp +
4824             msecs_to_jiffies(il->cfg->wd_timeout);
4825
4826         if (time_after(now, timeout)) {
4827                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4828                        jiffies_to_msecs(now - txq->time_stamp));
4829                 ret = il_force_reset(il, false);
4830                 return (ret == -EAGAIN) ? 0 : 1;
4831         }
4832
4833         return 0;
4834 }
4835
4836 /*
4837  * Making watchdog tick be a quarter of timeout assure we will
4838  * discover the queue hung between timeout and 1.25*timeout
4839  */
4840 #define IL_WD_TICK(timeout) ((timeout) / 4)
4841
4842 /*
4843  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4844  * we reset the firmware. If everything is fine just rearm the timer.
4845  */
4846 void
4847 il_bg_watchdog(unsigned long data)
4848 {
4849         struct il_priv *il = (struct il_priv *)data;
4850         int cnt;
4851         unsigned long timeout;
4852
4853         if (test_bit(S_EXIT_PENDING, &il->status))
4854                 return;
4855
4856         timeout = il->cfg->wd_timeout;
4857         if (timeout == 0)
4858                 return;
4859
4860         /* monitor and check for stuck cmd queue */
4861         if (il_check_stuck_queue(il, il->cmd_queue))
4862                 return;
4863
4864         /* monitor and check for other stuck queues */
4865         for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4866                 /* skip as we already checked the command queue */
4867                 if (cnt == il->cmd_queue)
4868                         continue;
4869                 if (il_check_stuck_queue(il, cnt))
4870                         return;
4871         }
4872
4873         mod_timer(&il->watchdog,
4874                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4875 }
4876 EXPORT_SYMBOL(il_bg_watchdog);
4877
4878 void
4879 il_setup_watchdog(struct il_priv *il)
4880 {
4881         unsigned int timeout = il->cfg->wd_timeout;
4882
4883         if (timeout)
4884                 mod_timer(&il->watchdog,
4885                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4886         else
4887                 del_timer(&il->watchdog);
4888 }
4889 EXPORT_SYMBOL(il_setup_watchdog);
4890
4891 /*
4892  * extended beacon time format
4893  * time in usec will be changed into a 32-bit value in extended:internal format
4894  * the extended part is the beacon counts
4895  * the internal part is the time in usec within one beacon interval
4896  */
4897 u32
4898 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4899 {
4900         u32 quot;
4901         u32 rem;
4902         u32 interval = beacon_interval * TIME_UNIT;
4903
4904         if (!interval || !usec)
4905                 return 0;
4906
4907         quot =
4908             (usec /
4909              interval) & (il_beacon_time_mask_high(il,
4910                                                    il->hw_params.
4911                                                    beacon_time_tsf_bits) >> il->
4912                           hw_params.beacon_time_tsf_bits);
4913         rem =
4914             (usec % interval) & il_beacon_time_mask_low(il,
4915                                                         il->hw_params.
4916                                                         beacon_time_tsf_bits);
4917
4918         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4919 }
4920 EXPORT_SYMBOL(il_usecs_to_beacons);
4921
4922 /* base is usually what we get from ucode with each received frame,
4923  * the same as HW timer counter counting down
4924  */
4925 __le32
4926 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4927                    u32 beacon_interval)
4928 {
4929         u32 base_low = base & il_beacon_time_mask_low(il,
4930                                                       il->hw_params.
4931                                                       beacon_time_tsf_bits);
4932         u32 addon_low = addon & il_beacon_time_mask_low(il,
4933                                                         il->hw_params.
4934                                                         beacon_time_tsf_bits);
4935         u32 interval = beacon_interval * TIME_UNIT;
4936         u32 res = (base & il_beacon_time_mask_high(il,
4937                                                    il->hw_params.
4938                                                    beacon_time_tsf_bits)) +
4939             (addon & il_beacon_time_mask_high(il,
4940                                               il->hw_params.
4941                                               beacon_time_tsf_bits));
4942
4943         if (base_low > addon_low)
4944                 res += base_low - addon_low;
4945         else if (base_low < addon_low) {
4946                 res += interval + base_low - addon_low;
4947                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4948         } else
4949                 res += (1 << il->hw_params.beacon_time_tsf_bits);
4950
4951         return cpu_to_le32(res);
4952 }
4953 EXPORT_SYMBOL(il_add_beacon_time);
4954
4955 #ifdef CONFIG_PM_SLEEP
4956
4957 static int
4958 il_pci_suspend(struct device *device)
4959 {
4960         struct pci_dev *pdev = to_pci_dev(device);
4961         struct il_priv *il = pci_get_drvdata(pdev);
4962
4963         /*
4964          * This function is called when system goes into suspend state
4965          * mac80211 will call il_mac_stop() from the mac80211 suspend function
4966          * first but since il_mac_stop() has no knowledge of who the caller is,
4967          * it will not call apm_ops.stop() to stop the DMA operation.
4968          * Calling apm_ops.stop here to make sure we stop the DMA.
4969          */
4970         il_apm_stop(il);
4971
4972         return 0;
4973 }
4974
4975 static int
4976 il_pci_resume(struct device *device)
4977 {
4978         struct pci_dev *pdev = to_pci_dev(device);
4979         struct il_priv *il = pci_get_drvdata(pdev);
4980         bool hw_rfkill = false;
4981
4982         /*
4983          * We disable the RETRY_TIMEOUT register (0x41) to keep
4984          * PCI Tx retries from interfering with C3 CPU state.
4985          */
4986         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4987
4988         il_enable_interrupts(il);
4989
4990         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4991                 hw_rfkill = true;
4992
4993         if (hw_rfkill)
4994                 set_bit(S_RFKILL, &il->status);
4995         else
4996                 clear_bit(S_RFKILL, &il->status);
4997
4998         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4999
5000         return 0;
5001 }
5002
5003 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
5004 EXPORT_SYMBOL(il_pm_ops);
5005
5006 #endif /* CONFIG_PM_SLEEP */
5007
5008 static void
5009 il_update_qos(struct il_priv *il)
5010 {
5011         if (test_bit(S_EXIT_PENDING, &il->status))
5012                 return;
5013
5014         il->qos_data.def_qos_parm.qos_flags = 0;
5015
5016         if (il->qos_data.qos_active)
5017                 il->qos_data.def_qos_parm.qos_flags |=
5018                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5019
5020         if (il->ht.enabled)
5021                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5022
5023         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5024               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5025
5026         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5027                               &il->qos_data.def_qos_parm, NULL);
5028 }
5029
5030 /**
5031  * il_mac_config - mac80211 config callback
5032  */
5033 int
5034 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5035 {
5036         struct il_priv *il = hw->priv;
5037         const struct il_channel_info *ch_info;
5038         struct ieee80211_conf *conf = &hw->conf;
5039         struct ieee80211_channel *channel = conf->chandef.chan;
5040         struct il_ht_config *ht_conf = &il->current_ht_config;
5041         unsigned long flags = 0;
5042         int ret = 0;
5043         u16 ch;
5044         int scan_active = 0;
5045         bool ht_changed = false;
5046
5047         mutex_lock(&il->mutex);
5048         D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5049                    changed);
5050
5051         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5052                 scan_active = 1;
5053                 D_MAC80211("scan active\n");
5054         }
5055
5056         if (changed &
5057             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5058                 /* mac80211 uses static for non-HT which is what we want */
5059                 il->current_ht_config.smps = conf->smps_mode;
5060
5061                 /*
5062                  * Recalculate chain counts.
5063                  *
5064                  * If monitor mode is enabled then mac80211 will
5065                  * set up the SM PS mode to OFF if an HT channel is
5066                  * configured.
5067                  */
5068                 if (il->ops->set_rxon_chain)
5069                         il->ops->set_rxon_chain(il);
5070         }
5071
5072         /* during scanning mac80211 will delay channel setting until
5073          * scan finish with changed = 0
5074          */
5075         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5076
5077                 if (scan_active)
5078                         goto set_ch_out;
5079
5080                 ch = channel->hw_value;
5081                 ch_info = il_get_channel_info(il, channel->band, ch);
5082                 if (!il_is_channel_valid(ch_info)) {
5083                         D_MAC80211("leave - invalid channel\n");
5084                         ret = -EINVAL;
5085                         goto set_ch_out;
5086                 }
5087
5088                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5089                     !il_is_channel_ibss(ch_info)) {
5090                         D_MAC80211("leave - not IBSS channel\n");
5091                         ret = -EINVAL;
5092                         goto set_ch_out;
5093                 }
5094
5095                 spin_lock_irqsave(&il->lock, flags);
5096
5097                 /* Configure HT40 channels */
5098                 if (il->ht.enabled != conf_is_ht(conf)) {
5099                         il->ht.enabled = conf_is_ht(conf);
5100                         ht_changed = true;
5101                 }
5102                 if (il->ht.enabled) {
5103                         if (conf_is_ht40_minus(conf)) {
5104                                 il->ht.extension_chan_offset =
5105                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5106                                 il->ht.is_40mhz = true;
5107                         } else if (conf_is_ht40_plus(conf)) {
5108                                 il->ht.extension_chan_offset =
5109                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5110                                 il->ht.is_40mhz = true;
5111                         } else {
5112                                 il->ht.extension_chan_offset =
5113                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5114                                 il->ht.is_40mhz = false;
5115                         }
5116                 } else
5117                         il->ht.is_40mhz = false;
5118
5119                 /*
5120                  * Default to no protection. Protection mode will
5121                  * later be set from BSS config in il_ht_conf
5122                  */
5123                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5124
5125                 /* if we are switching from ht to 2.4 clear flags
5126                  * from any ht related info since 2.4 does not
5127                  * support ht */
5128                 if ((le16_to_cpu(il->staging.channel) != ch))
5129                         il->staging.flags = 0;
5130
5131                 il_set_rxon_channel(il, channel);
5132                 il_set_rxon_ht(il, ht_conf);
5133
5134                 il_set_flags_for_band(il, channel->band, il->vif);
5135
5136                 spin_unlock_irqrestore(&il->lock, flags);
5137
5138                 if (il->ops->update_bcast_stations)
5139                         ret = il->ops->update_bcast_stations(il);
5140
5141 set_ch_out:
5142                 /* The list of supported rates and rate mask can be different
5143                  * for each band; since the band may have changed, reset
5144                  * the rate mask to what mac80211 lists */
5145                 il_set_rate(il);
5146         }
5147
5148         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5149                 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5150                 ret = il_power_update_mode(il, false);
5151                 if (ret)
5152                         D_MAC80211("Error setting sleep level\n");
5153         }
5154
5155         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5156                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5157                            conf->power_level);
5158
5159                 il_set_tx_power(il, conf->power_level, false);
5160         }
5161
5162         if (!il_is_ready(il)) {
5163                 D_MAC80211("leave - not ready\n");
5164                 goto out;
5165         }
5166
5167         if (scan_active)
5168                 goto out;
5169
5170         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5171                 il_commit_rxon(il);
5172         else
5173                 D_INFO("Not re-sending same RXON configuration.\n");
5174         if (ht_changed)
5175                 il_update_qos(il);
5176
5177 out:
5178         D_MAC80211("leave ret %d\n", ret);
5179         mutex_unlock(&il->mutex);
5180
5181         return ret;
5182 }
5183 EXPORT_SYMBOL(il_mac_config);
5184
5185 void
5186 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5187 {
5188         struct il_priv *il = hw->priv;
5189         unsigned long flags;
5190
5191         mutex_lock(&il->mutex);
5192         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5193
5194         spin_lock_irqsave(&il->lock, flags);
5195
5196         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5197
5198         /* new association get rid of ibss beacon skb */
5199         if (il->beacon_skb)
5200                 dev_kfree_skb(il->beacon_skb);
5201         il->beacon_skb = NULL;
5202         il->timestamp = 0;
5203
5204         spin_unlock_irqrestore(&il->lock, flags);
5205
5206         il_scan_cancel_timeout(il, 100);
5207         if (!il_is_ready_rf(il)) {
5208                 D_MAC80211("leave - not ready\n");
5209                 mutex_unlock(&il->mutex);
5210                 return;
5211         }
5212
5213         /* we are restarting association process */
5214         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5215         il_commit_rxon(il);
5216
5217         il_set_rate(il);
5218
5219         D_MAC80211("leave\n");
5220         mutex_unlock(&il->mutex);
5221 }
5222 EXPORT_SYMBOL(il_mac_reset_tsf);
5223
5224 static void
5225 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5226 {
5227         struct il_ht_config *ht_conf = &il->current_ht_config;
5228         struct ieee80211_sta *sta;
5229         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5230
5231         D_ASSOC("enter:\n");
5232
5233         if (!il->ht.enabled)
5234                 return;
5235
5236         il->ht.protection =
5237             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5238         il->ht.non_gf_sta_present =
5239             !!(bss_conf->
5240                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5241
5242         ht_conf->single_chain_sufficient = false;
5243
5244         switch (vif->type) {
5245         case NL80211_IFTYPE_STATION:
5246                 rcu_read_lock();
5247                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5248                 if (sta) {
5249                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5250                         int maxstreams;
5251
5252                         maxstreams =
5253                             (ht_cap->mcs.
5254                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5255                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5256                         maxstreams += 1;
5257
5258                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5259                             ht_cap->mcs.rx_mask[2] == 0)
5260                                 ht_conf->single_chain_sufficient = true;
5261                         if (maxstreams <= 1)
5262                                 ht_conf->single_chain_sufficient = true;
5263                 } else {
5264                         /*
5265                          * If at all, this can only happen through a race
5266                          * when the AP disconnects us while we're still
5267                          * setting up the connection, in that case mac80211
5268                          * will soon tell us about that.
5269                          */
5270                         ht_conf->single_chain_sufficient = true;
5271                 }
5272                 rcu_read_unlock();
5273                 break;
5274         case NL80211_IFTYPE_ADHOC:
5275                 ht_conf->single_chain_sufficient = true;
5276                 break;
5277         default:
5278                 break;
5279         }
5280
5281         D_ASSOC("leave\n");
5282 }
5283
5284 static inline void
5285 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5286 {
5287         /*
5288          * inform the ucode that there is no longer an
5289          * association and that no more packets should be
5290          * sent
5291          */
5292         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5293         il->staging.assoc_id = 0;
5294         il_commit_rxon(il);
5295 }
5296
5297 static void
5298 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5299 {
5300         struct il_priv *il = hw->priv;
5301         unsigned long flags;
5302         __le64 timestamp;
5303         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5304
5305         if (!skb)
5306                 return;
5307
5308         D_MAC80211("enter\n");
5309
5310         lockdep_assert_held(&il->mutex);
5311
5312         if (!il->beacon_enabled) {
5313                 IL_ERR("update beacon with no beaconing enabled\n");
5314                 dev_kfree_skb(skb);
5315                 return;
5316         }
5317
5318         spin_lock_irqsave(&il->lock, flags);
5319
5320         if (il->beacon_skb)
5321                 dev_kfree_skb(il->beacon_skb);
5322
5323         il->beacon_skb = skb;
5324
5325         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5326         il->timestamp = le64_to_cpu(timestamp);
5327
5328         D_MAC80211("leave\n");
5329         spin_unlock_irqrestore(&il->lock, flags);
5330
5331         if (!il_is_ready_rf(il)) {
5332                 D_MAC80211("leave - RF not ready\n");
5333                 return;
5334         }
5335
5336         il->ops->post_associate(il);
5337 }
5338
5339 void
5340 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5341                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5342 {
5343         struct il_priv *il = hw->priv;
5344         int ret;
5345
5346         mutex_lock(&il->mutex);
5347         D_MAC80211("enter: changes 0x%x\n", changes);
5348
5349         if (!il_is_alive(il)) {
5350                 D_MAC80211("leave - not alive\n");
5351                 mutex_unlock(&il->mutex);
5352                 return;
5353         }
5354
5355         if (changes & BSS_CHANGED_QOS) {
5356                 unsigned long flags;
5357
5358                 spin_lock_irqsave(&il->lock, flags);
5359                 il->qos_data.qos_active = bss_conf->qos;
5360                 il_update_qos(il);
5361                 spin_unlock_irqrestore(&il->lock, flags);
5362         }
5363
5364         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5365                 /* FIXME: can we remove beacon_enabled ? */
5366                 if (vif->bss_conf.enable_beacon)
5367                         il->beacon_enabled = true;
5368                 else
5369                         il->beacon_enabled = false;
5370         }
5371
5372         if (changes & BSS_CHANGED_BSSID) {
5373                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5374
5375                 /*
5376                  * On passive channel we wait with blocked queues to see if
5377                  * there is traffic on that channel. If no frame will be
5378                  * received (what is very unlikely since scan detects AP on
5379                  * that channel, but theoretically possible), mac80211 associate
5380                  * procedure will time out and mac80211 will call us with NULL
5381                  * bssid. We have to unblock queues on such condition.
5382                  */
5383                 if (is_zero_ether_addr(bss_conf->bssid))
5384                         il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5385
5386                 /*
5387                  * If there is currently a HW scan going on in the background,
5388                  * then we need to cancel it, otherwise sometimes we are not
5389                  * able to authenticate (FIXME: why ?)
5390                  */
5391                 if (il_scan_cancel_timeout(il, 100)) {
5392                         D_MAC80211("leave - scan abort failed\n");
5393                         mutex_unlock(&il->mutex);
5394                         return;
5395                 }
5396
5397                 /* mac80211 only sets assoc when in STATION mode */
5398                 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5399
5400                 /* FIXME: currently needed in a few places */
5401                 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5402         }
5403
5404         /*
5405          * This needs to be after setting the BSSID in case
5406          * mac80211 decides to do both changes at once because
5407          * it will invoke post_associate.
5408          */
5409         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5410                 il_beacon_update(hw, vif);
5411
5412         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5413                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5414                 if (bss_conf->use_short_preamble)
5415                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5416                 else
5417                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5418         }
5419
5420         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5421                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5422                 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5423                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5424                 else
5425                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5426                 if (bss_conf->use_cts_prot)
5427                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5428                 else
5429                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5430         }
5431
5432         if (changes & BSS_CHANGED_BASIC_RATES) {
5433                 /* XXX use this information
5434                  *
5435                  * To do that, remove code from il_set_rate() and put something
5436                  * like this here:
5437                  *
5438                  if (A-band)
5439                  il->staging.ofdm_basic_rates =
5440                  bss_conf->basic_rates;
5441                  else
5442                  il->staging.ofdm_basic_rates =
5443                  bss_conf->basic_rates >> 4;
5444                  il->staging.cck_basic_rates =
5445                  bss_conf->basic_rates & 0xF;
5446                  */
5447         }
5448
5449         if (changes & BSS_CHANGED_HT) {
5450                 il_ht_conf(il, vif);
5451
5452                 if (il->ops->set_rxon_chain)
5453                         il->ops->set_rxon_chain(il);
5454         }
5455
5456         if (changes & BSS_CHANGED_ASSOC) {
5457                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5458                 if (bss_conf->assoc) {
5459                         il->timestamp = bss_conf->sync_tsf;
5460
5461                         if (!il_is_rfkill(il))
5462                                 il->ops->post_associate(il);
5463                 } else
5464                         il_set_no_assoc(il, vif);
5465         }
5466
5467         if (changes && il_is_associated(il) && bss_conf->aid) {
5468                 D_MAC80211("Changes (%#x) while associated\n", changes);
5469                 ret = il_send_rxon_assoc(il);
5470                 if (!ret) {
5471                         /* Sync active_rxon with latest change. */
5472                         memcpy((void *)&il->active, &il->staging,
5473                                sizeof(struct il_rxon_cmd));
5474                 }
5475         }
5476
5477         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5478                 if (vif->bss_conf.enable_beacon) {
5479                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5480                                ETH_ALEN);
5481                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5482                         il->ops->config_ap(il);
5483                 } else
5484                         il_set_no_assoc(il, vif);
5485         }
5486
5487         if (changes & BSS_CHANGED_IBSS) {
5488                 ret = il->ops->manage_ibss_station(il, vif,
5489                                                    bss_conf->ibss_joined);
5490                 if (ret)
5491                         IL_ERR("failed to %s IBSS station %pM\n",
5492                                bss_conf->ibss_joined ? "add" : "remove",
5493                                bss_conf->bssid);
5494         }
5495
5496         D_MAC80211("leave\n");
5497         mutex_unlock(&il->mutex);
5498 }
5499 EXPORT_SYMBOL(il_mac_bss_info_changed);
5500
5501 irqreturn_t
5502 il_isr(int irq, void *data)
5503 {
5504         struct il_priv *il = data;
5505         u32 inta, inta_mask;
5506         u32 inta_fh;
5507         unsigned long flags;
5508         if (!il)
5509                 return IRQ_NONE;
5510
5511         spin_lock_irqsave(&il->lock, flags);
5512
5513         /* Disable (but don't clear!) interrupts here to avoid
5514          *    back-to-back ISRs and sporadic interrupts from our NIC.
5515          * If we have something to service, the tasklet will re-enable ints.
5516          * If we *don't* have something, we'll re-enable before leaving here. */
5517         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5518         _il_wr(il, CSR_INT_MASK, 0x00000000);
5519
5520         /* Discover which interrupts are active/pending */
5521         inta = _il_rd(il, CSR_INT);
5522         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5523
5524         /* Ignore interrupt if there's nothing in NIC to service.
5525          * This may be due to IRQ shared with another device,
5526          * or due to sporadic interrupts thrown from our NIC. */
5527         if (!inta && !inta_fh) {
5528                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5529                 goto none;
5530         }
5531
5532         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5533                 /* Hardware disappeared. It might have already raised
5534                  * an interrupt */
5535                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5536                 goto unplugged;
5537         }
5538
5539         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5540               inta_fh);
5541
5542         inta &= ~CSR_INT_BIT_SCD;
5543
5544         /* il_irq_tasklet() will service interrupts and re-enable them */
5545         if (likely(inta || inta_fh))
5546                 tasklet_schedule(&il->irq_tasklet);
5547
5548 unplugged:
5549         spin_unlock_irqrestore(&il->lock, flags);
5550         return IRQ_HANDLED;
5551
5552 none:
5553         /* re-enable interrupts here since we don't have anything to service. */
5554         /* only Re-enable if disabled by irq */
5555         if (test_bit(S_INT_ENABLED, &il->status))
5556                 il_enable_interrupts(il);
5557         spin_unlock_irqrestore(&il->lock, flags);
5558         return IRQ_NONE;
5559 }
5560 EXPORT_SYMBOL(il_isr);
5561
5562 /*
5563  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5564  *  function.
5565  */
5566 void
5567 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5568                      __le16 fc, __le32 *tx_flags)
5569 {
5570         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5571                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5572                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5573                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5574
5575                 if (!ieee80211_is_mgmt(fc))
5576                         return;
5577
5578                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5579                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5580                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5581                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5582                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5583                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5584                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5585                         break;
5586                 }
5587         } else if (info->control.rates[0].
5588                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5589                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5590                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5591                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5592         }
5593 }
5594 EXPORT_SYMBOL(il_tx_cmd_protection);