drivers/net/wireless/iwlegacy/common.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <linux/types.h>
  35 #include <linux/lockdep.h>
  36 #include <linux/init.h>
  37 #include <linux/pci.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/skbuff.h>
  41 #include <net/mac80211.h>
  42
  43 #include "common.h"
  44
  45 int
  46 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
  47 {
  48         const int interval = 10; /* microseconds */
  49         int t = 0;
  50
  51         do {
  52                 if ((_il_rd(il, addr) & mask) == (bits & mask))
  53                         return t;
  54                 udelay(interval);
  55                 t += interval;
  56         } while (t < timeout);
  57
  58         return -ETIMEDOUT;
  59 }
  60 EXPORT_SYMBOL(_il_poll_bit);
  61
  62 void
  63 il_set_bit(struct il_priv *p, u32 r, u32 m)
  64 {
  65         unsigned long reg_flags;
  66
  67         spin_lock_irqsave(&p->reg_lock, reg_flags);
  68         _il_set_bit(p, r, m);
  69         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  70 }
  71 EXPORT_SYMBOL(il_set_bit);
  72
  73 void
  74 il_clear_bit(struct il_priv *p, u32 r, u32 m)
  75 {
  76         unsigned long reg_flags;
  77
  78         spin_lock_irqsave(&p->reg_lock, reg_flags);
  79         _il_clear_bit(p, r, m);
  80         spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  81 }
  82 EXPORT_SYMBOL(il_clear_bit);
  83
  84 bool
  85 _il_grab_nic_access(struct il_priv *il)
  86 {
  87         int ret;
  88         u32 val;
  89
  90         /* this bit wakes up the NIC */
  91         _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
  92
  93         /*
  94          * These bits say the device is running, and should keep running for
  95          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
  96          * but they do not indicate that embedded SRAM is restored yet;
  97          * 3945 and 4965 have volatile SRAM, and must save/restore contents
  98          * to/from host DRAM when sleeping/waking for power-saving.
  99          * Each direction takes approximately 1/4 millisecond; with this
 100          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
 101          * series of register accesses are expected (e.g. reading Event Log),
 102          * to keep device from sleeping.
 103          *
 104          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
 105          * SRAM is okay/restored.  We don't check that here because this call
 106          * is just for hardware register access; but GP1 MAC_SLEEP check is a
 107          * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
 108          *
 109          */
 110         ret =
 111             _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 112                          (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 113                           CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
 114         if (unlikely(ret < 0)) {
 115                 val = _il_rd(il, CSR_GP_CNTRL);
 116                 WARN_ONCE(1, "Timeout waiting for ucode processor access "
 117                              "(CSR_GP_CNTRL 0x%08x)\n", val);
 118                 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 119                 return false;
 120         }
 121
 122         return true;
 123 }
 124 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
 125
 126 int
 127 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
 128 {
 129         const int interval = 10; /* microseconds */
 130         int t = 0;
 131
 132         do {
 133                 if ((il_rd(il, addr) & mask) == mask)
 134                         return t;
 135                 udelay(interval);
 136                 t += interval;
 137         } while (t < timeout);
 138
 139         return -ETIMEDOUT;
 140 }
 141 EXPORT_SYMBOL(il_poll_bit);
 142
 143 u32
 144 il_rd_prph(struct il_priv *il, u32 reg)
 145 {
 146         unsigned long reg_flags;
 147         u32 val;
 148
 149         spin_lock_irqsave(&il->reg_lock, reg_flags);
 150         _il_grab_nic_access(il);
 151         val = _il_rd_prph(il, reg);
 152         _il_release_nic_access(il);
 153         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 154         return val;
 155 }
 156 EXPORT_SYMBOL(il_rd_prph);
 157
 158 void
 159 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
 160 {
 161         unsigned long reg_flags;
 162
 163         spin_lock_irqsave(&il->reg_lock, reg_flags);
 164         if (likely(_il_grab_nic_access(il))) {
 165                 _il_wr_prph(il, addr, val);
 166                 _il_release_nic_access(il);
 167         }
 168         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 169 }
 170 EXPORT_SYMBOL(il_wr_prph);
 171
 172 u32
 173 il_read_targ_mem(struct il_priv *il, u32 addr)
 174 {
 175         unsigned long reg_flags;
 176         u32 value;
 177
 178         spin_lock_irqsave(&il->reg_lock, reg_flags);
 179         _il_grab_nic_access(il);
 180
 181         _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
 182         value = _il_rd(il, HBUS_TARG_MEM_RDAT);
 183
 184         _il_release_nic_access(il);
 185         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 186         return value;
 187 }
 188 EXPORT_SYMBOL(il_read_targ_mem);
 189
 190 void
 191 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
 192 {
 193         unsigned long reg_flags;
 194
 195         spin_lock_irqsave(&il->reg_lock, reg_flags);
 196         if (likely(_il_grab_nic_access(il))) {
 197                 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
 198                 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
 199                 _il_release_nic_access(il);
 200         }
 201         spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 202 }
 203 EXPORT_SYMBOL(il_write_targ_mem);
 204
 205 const char *
 206 il_get_cmd_string(u8 cmd)
 207 {
 208         switch (cmd) {
 209                 IL_CMD(N_ALIVE);
 210                 IL_CMD(N_ERROR);
 211                 IL_CMD(C_RXON);
 212                 IL_CMD(C_RXON_ASSOC);
 213                 IL_CMD(C_QOS_PARAM);
 214                 IL_CMD(C_RXON_TIMING);
 215                 IL_CMD(C_ADD_STA);
 216                 IL_CMD(C_REM_STA);
 217                 IL_CMD(C_WEPKEY);
 218                 IL_CMD(N_3945_RX);
 219                 IL_CMD(C_TX);
 220                 IL_CMD(C_RATE_SCALE);
 221                 IL_CMD(C_LEDS);
 222                 IL_CMD(C_TX_LINK_QUALITY_CMD);
 223                 IL_CMD(C_CHANNEL_SWITCH);
 224                 IL_CMD(N_CHANNEL_SWITCH);
 225                 IL_CMD(C_SPECTRUM_MEASUREMENT);
 226                 IL_CMD(N_SPECTRUM_MEASUREMENT);
 227                 IL_CMD(C_POWER_TBL);
 228                 IL_CMD(N_PM_SLEEP);
 229                 IL_CMD(N_PM_DEBUG_STATS);
 230                 IL_CMD(C_SCAN);
 231                 IL_CMD(C_SCAN_ABORT);
 232                 IL_CMD(N_SCAN_START);
 233                 IL_CMD(N_SCAN_RESULTS);
 234                 IL_CMD(N_SCAN_COMPLETE);
 235                 IL_CMD(N_BEACON);
 236                 IL_CMD(C_TX_BEACON);
 237                 IL_CMD(C_TX_PWR_TBL);
 238                 IL_CMD(C_BT_CONFIG);
 239                 IL_CMD(C_STATS);
 240                 IL_CMD(N_STATS);
 241                 IL_CMD(N_CARD_STATE);
 242                 IL_CMD(N_MISSED_BEACONS);
 243                 IL_CMD(C_CT_KILL_CONFIG);
 244                 IL_CMD(C_SENSITIVITY);
 245                 IL_CMD(C_PHY_CALIBRATION);
 246                 IL_CMD(N_RX_PHY);
 247                 IL_CMD(N_RX_MPDU);
 248                 IL_CMD(N_RX);
 249                 IL_CMD(N_COMPRESSED_BA);
 250         default:
 251                 return "UNKNOWN";
 252
 253         }
 254 }
 255 EXPORT_SYMBOL(il_get_cmd_string);
 256
 257 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 258
 259 static void
 260 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
 261                         struct il_rx_pkt *pkt)
 262 {
 263         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 264                 IL_ERR("Bad return from %s (0x%08X)\n",
 265                        il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 266                 return;
 267         }
 268 #ifdef CONFIG_IWLEGACY_DEBUG
 269         switch (cmd->hdr.cmd) {
 270         case C_TX_LINK_QUALITY_CMD:
 271         case C_SENSITIVITY:
 272                 D_HC_DUMP("back from %s (0x%08X)\n",
 273                           il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 274                 break;
 275         default:
 276                 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
 277                      pkt->hdr.flags);
 278         }
 279 #endif
 280 }
 281
 282 static int
 283 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 284 {
 285         int ret;
 286
 287         BUG_ON(!(cmd->flags & CMD_ASYNC));
 288
 289         /* An asynchronous command can not expect an SKB to be set. */
 290         BUG_ON(cmd->flags & CMD_WANT_SKB);
 291
 292         /* Assign a generic callback if one is not provided */
 293         if (!cmd->callback)
 294                 cmd->callback = il_generic_cmd_callback;
 295
 296         if (test_bit(S_EXIT_PENDING, &il->status))
 297                 return -EBUSY;
 298
 299         ret = il_enqueue_hcmd(il, cmd);
 300         if (ret < 0) {
 301                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 302                        il_get_cmd_string(cmd->id), ret);
 303                 return ret;
 304         }
 305         return 0;
 306 }
 307
 308 int
 309 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 310 {
 311         int cmd_idx;
 312         int ret;
 313
 314         lockdep_assert_held(&il->mutex);
 315
 316         BUG_ON(cmd->flags & CMD_ASYNC);
 317
 318         /* A synchronous command can not have a callback set. */
 319         BUG_ON(cmd->callback);
 320
 321         D_INFO("Attempting to send sync command %s\n",
 322                il_get_cmd_string(cmd->id));
 323
 324         set_bit(S_HCMD_ACTIVE, &il->status);
 325         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 326                il_get_cmd_string(cmd->id));
 327
 328         cmd_idx = il_enqueue_hcmd(il, cmd);
 329         if (cmd_idx < 0) {
 330                 ret = cmd_idx;
 331                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 332                        il_get_cmd_string(cmd->id), ret);
 333                 goto out;
 334         }
 335
 336         ret = wait_event_timeout(il->wait_command_queue,
 337                                  !test_bit(S_HCMD_ACTIVE, &il->status),
 338                                  HOST_COMPLETE_TIMEOUT);
 339         if (!ret) {
 340                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 341                         IL_ERR("Error sending %s: time out after %dms.\n",
 342                                il_get_cmd_string(cmd->id),
 343                                jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 344
 345                         clear_bit(S_HCMD_ACTIVE, &il->status);
 346                         D_INFO("Clearing HCMD_ACTIVE for command %s\n",
 347                                il_get_cmd_string(cmd->id));
 348                         ret = -ETIMEDOUT;
 349                         goto cancel;
 350                 }
 351         }
 352
 353         if (test_bit(S_RF_KILL_HW, &il->status)) {
 354                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 355                        il_get_cmd_string(cmd->id));
 356                 ret = -ECANCELED;
 357                 goto fail;
 358         }
 359         if (test_bit(S_FW_ERROR, &il->status)) {
 360                 IL_ERR("Command %s failed: FW Error\n",
 361                        il_get_cmd_string(cmd->id));
 362                 ret = -EIO;
 363                 goto fail;
 364         }
 365         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 366                 IL_ERR("Error: Response NULL in '%s'\n",
 367                        il_get_cmd_string(cmd->id));
 368                 ret = -EIO;
 369                 goto cancel;
 370         }
 371
 372         ret = 0;
 373         goto out;
 374
 375 cancel:
 376         if (cmd->flags & CMD_WANT_SKB) {
 377                 /*
 378                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 379                  * TX cmd queue. Otherwise in case the cmd comes
 380                  * in later, it will possibly set an invalid
 381                  * address (cmd->meta.source).
 382                  */
 383                 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
 384         }
 385 fail:
 386         if (cmd->reply_page) {
 387                 il_free_pages(il, cmd->reply_page);
 388                 cmd->reply_page = 0;
 389         }
 390 out:
 391         return ret;
 392 }
 393 EXPORT_SYMBOL(il_send_cmd_sync);
 394
 395 int
 396 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 397 {
 398         if (cmd->flags & CMD_ASYNC)
 399                 return il_send_cmd_async(il, cmd);
 400
 401         return il_send_cmd_sync(il, cmd);
 402 }
 403 EXPORT_SYMBOL(il_send_cmd);
 404
 405 int
 406 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 407 {
 408         struct il_host_cmd cmd = {
 409                 .id = id,
 410                 .len = len,
 411                 .data = data,
 412         };
 413
 414         return il_send_cmd_sync(il, &cmd);
 415 }
 416 EXPORT_SYMBOL(il_send_cmd_pdu);
 417
 418 int
 419 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
 420                       void (*callback) (struct il_priv *il,
 421                                         struct il_device_cmd *cmd,
 422                                         struct il_rx_pkt *pkt))
 423 {
 424         struct il_host_cmd cmd = {
 425                 .id = id,
 426                 .len = len,
 427                 .data = data,
 428         };
 429
 430         cmd.flags |= CMD_ASYNC;
 431         cmd.callback = callback;
 432
 433         return il_send_cmd_async(il, &cmd);
 434 }
 435 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 436
 437 /* default: IL_LED_BLINK(0) using blinking idx table */
 438 static int led_mode;
 439 module_param(led_mode, int, S_IRUGO);
 440 MODULE_PARM_DESC(led_mode,
 441                  "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
 442
 443 /* Throughput           OFF time(ms)    ON time (ms)
 444  *      >300                    25              25
 445  *      >200 to 300             40              40
 446  *      >100 to 200             55              55
 447  *      >70 to 100              65              65
 448  *      >50 to 70               75              75
 449  *      >20 to 50               85              85
 450  *      >10 to 20               95              95
 451  *      >5 to 10                110             110
 452  *      >1 to 5                 130             130
 453  *      >0 to 1                 167             167
 454  *      <=0                                     SOLID ON
 455  */
 456 static const struct ieee80211_tpt_blink il_blink[] = {
 457         {.throughput = 0,               .blink_time = 334},
 458         {.throughput = 1 * 1024 - 1,    .blink_time = 260},
 459         {.throughput = 5 * 1024 - 1,    .blink_time = 220},
 460         {.throughput = 10 * 1024 - 1,   .blink_time = 190},
 461         {.throughput = 20 * 1024 - 1,   .blink_time = 170},
 462         {.throughput = 50 * 1024 - 1,   .blink_time = 150},
 463         {.throughput = 70 * 1024 - 1,   .blink_time = 130},
 464         {.throughput = 100 * 1024 - 1,  .blink_time = 110},
 465         {.throughput = 200 * 1024 - 1,  .blink_time = 80},
 466         {.throughput = 300 * 1024 - 1,  .blink_time = 50},
 467 };
 468
 469 /*
 470  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 471  * Led blink rate analysis showed an average deviation of 0% on 3945,
 472  * 5% on 4965 HW.
 473  * Need to compensate on the led on/off time per HW according to the deviation
 474  * to achieve the desired led frequency
 475  * The calculation is: (100-averageDeviation)/100 * blinkTime
 476  * For code efficiency the calculation will be:
 477  *     compensation = (100 - averageDeviation) * 64 / 100
 478  *     NewBlinkTime = (compensation * BlinkTime) / 64
 479  */
 480 static inline u8
 481 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
 482 {
 483         if (!compensation) {
 484                 IL_ERR("undefined blink compensation: "
 485                        "use pre-defined blinking time\n");
 486                 return time;
 487         }
 488
 489         return (u8) ((time * compensation) >> 6);
 490 }
 491
 492 /* Set led pattern command */
 493 static int
 494 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
 495 {
 496         struct il_led_cmd led_cmd = {
 497                 .id = IL_LED_LINK,
 498                 .interval = IL_DEF_LED_INTRVL
 499         };
 500         int ret;
 501
 502         if (!test_bit(S_READY, &il->status))
 503                 return -EBUSY;
 504
 505         if (il->blink_on == on && il->blink_off == off)
 506                 return 0;
 507
 508         if (off == 0) {
 509                 /* led is SOLID_ON */
 510                 on = IL_LED_SOLID;
 511         }
 512
 513         D_LED("Led blink time compensation=%u\n",
 514               il->cfg->led_compensation);
 515         led_cmd.on =
 516             il_blink_compensation(il, on,
 517                                   il->cfg->led_compensation);
 518         led_cmd.off =
 519             il_blink_compensation(il, off,
 520                                   il->cfg->led_compensation);
 521
 522         ret = il->ops->led->cmd(il, &led_cmd);
 523         if (!ret) {
 524                 il->blink_on = on;
 525                 il->blink_off = off;
 526         }
 527         return ret;
 528 }
 529
 530 static void
 531 il_led_brightness_set(struct led_classdev *led_cdev,
 532                       enum led_brightness brightness)
 533 {
 534         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 535         unsigned long on = 0;
 536
 537         if (brightness > 0)
 538                 on = IL_LED_SOLID;
 539
 540         il_led_cmd(il, on, 0);
 541 }
 542
 543 static int
 544 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 545                  unsigned long *delay_off)
 546 {
 547         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 548
 549         return il_led_cmd(il, *delay_on, *delay_off);
 550 }
 551
 552 void
 553 il_leds_init(struct il_priv *il)
 554 {
 555         int mode = led_mode;
 556         int ret;
 557
 558         if (mode == IL_LED_DEFAULT)
 559                 mode = il->cfg->led_mode;
 560
 561         il->led.name =
 562             kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
 563         il->led.brightness_set = il_led_brightness_set;
 564         il->led.blink_set = il_led_blink_set;
 565         il->led.max_brightness = 1;
 566
 567         switch (mode) {
 568         case IL_LED_DEFAULT:
 569                 WARN_ON(1);
 570                 break;
 571         case IL_LED_BLINK:
 572                 il->led.default_trigger =
 573                     ieee80211_create_tpt_led_trigger(il->hw,
 574                                                      IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 575                                                      il_blink,
 576                                                      ARRAY_SIZE(il_blink));
 577                 break;
 578         case IL_LED_RF_STATE:
 579                 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
 580                 break;
 581         }
 582
 583         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 584         if (ret) {
 585                 kfree(il->led.name);
 586                 return;
 587         }
 588
 589         il->led_registered = true;
 590 }
 591 EXPORT_SYMBOL(il_leds_init);
 592
 593 void
 594 il_leds_exit(struct il_priv *il)
 595 {
 596         if (!il->led_registered)
 597                 return;
 598
 599         led_classdev_unregister(&il->led);
 600         kfree(il->led.name);
 601 }
 602 EXPORT_SYMBOL(il_leds_exit);
 603
 604 /************************** EEPROM BANDS ****************************
 605  *
 606  * The il_eeprom_band definitions below provide the mapping from the
 607  * EEPROM contents to the specific channel number supported for each
 608  * band.
 609  *
 610  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 611  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 612  * The specific geography and calibration information for that channel
 613  * is contained in the eeprom map itself.
 614  *
 615  * During init, we copy the eeprom information and channel map
 616  * information into il->channel_info_24/52 and il->channel_map_24/52
 617  *
 618  * channel_map_24/52 provides the idx in the channel_info array for a
 619  * given channel.  We have to have two separate maps as there is channel
 620  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 621  * band_2
 622  *
 623  * A value of 0xff stored in the channel_map indicates that the channel
 624  * is not supported by the hardware at all.
 625  *
 626  * A value of 0xfe in the channel_map indicates that the channel is not
 627  * valid for Tx with the current hardware.  This means that
 628  * while the system can tune and receive on a given channel, it may not
 629  * be able to associate or transmit any frames on that
 630  * channel.  There is no corresponding channel information for that
 631  * entry.
 632  *
 633  *********************************************************************/
 634
 635 /* 2.4 GHz */
 636 const u8 il_eeprom_band_1[14] = {
 637         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 638 };
 639
 640 /* 5.2 GHz bands */
 641 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 642         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 643 };
 644
 645 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 646         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 647 };
 648
 649 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 650         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 651 };
 652
 653 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 654         145, 149, 153, 157, 161, 165
 655 };
 656
 657 static const u8 il_eeprom_band_6[] = {  /* 2.4 ht40 channel */
 658         1, 2, 3, 4, 5, 6, 7
 659 };
 660
 661 static const u8 il_eeprom_band_7[] = {  /* 5.2 ht40 channel */
 662         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 663 };
 664
 665 /******************************************************************************
 666  *
 667  * EEPROM related functions
 668  *
 669 ******************************************************************************/
 670
 671 static int
 672 il_eeprom_verify_signature(struct il_priv *il)
 673 {
 674         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 675         int ret = 0;
 676
 677         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 678         switch (gp) {
 679         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 680         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 681                 break;
 682         default:
 683                 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
 684                 ret = -ENOENT;
 685                 break;
 686         }
 687         return ret;
 688 }
 689
 690 const u8 *
 691 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 692 {
 693         BUG_ON(offset >= il->cfg->eeprom_size);
 694         return &il->eeprom[offset];
 695 }
 696 EXPORT_SYMBOL(il_eeprom_query_addr);
 697
 698 u16
 699 il_eeprom_query16(const struct il_priv *il, size_t offset)
 700 {
 701         if (!il->eeprom)
 702                 return 0;
 703         return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
 704 }
 705 EXPORT_SYMBOL(il_eeprom_query16);
 706
 707 /**
 708  * il_eeprom_init - read EEPROM contents
 709  *
 710  * Load the EEPROM contents from adapter into il->eeprom
 711  *
 712  * NOTE:  This routine uses the non-debug IO access functions.
 713  */
 714 int
 715 il_eeprom_init(struct il_priv *il)
 716 {
 717         __le16 *e;
 718         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 719         int sz;
 720         int ret;
 721         u16 addr;
 722
 723         /* allocate eeprom */
 724         sz = il->cfg->eeprom_size;
 725         D_EEPROM("NVM size = %d\n", sz);
 726         il->eeprom = kzalloc(sz, GFP_KERNEL);
 727         if (!il->eeprom) {
 728                 ret = -ENOMEM;
 729                 goto alloc_err;
 730         }
 731         e = (__le16 *) il->eeprom;
 732
 733         il->ops->lib->apm_init(il);
 734
 735         ret = il_eeprom_verify_signature(il);
 736         if (ret < 0) {
 737                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 738                 ret = -ENOENT;
 739                 goto err;
 740         }
 741
 742         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 743         ret = il->ops->lib->eeprom_acquire_semaphore(il);
 744         if (ret < 0) {
 745                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 746                 ret = -ENOENT;
 747                 goto err;
 748         }
 749
 750         /* eeprom is an array of 16bit values */
 751         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 752                 u32 r;
 753
 754                 _il_wr(il, CSR_EEPROM_REG,
 755                        CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 756
 757                 ret =
 758                     _il_poll_bit(il, CSR_EEPROM_REG,
 759                                  CSR_EEPROM_REG_READ_VALID_MSK,
 760                                  CSR_EEPROM_REG_READ_VALID_MSK,
 761                                  IL_EEPROM_ACCESS_TIMEOUT);
 762                 if (ret < 0) {
 763                         IL_ERR("Time out reading EEPROM[%d]\n", addr);
 764                         goto done;
 765                 }
 766                 r = _il_rd(il, CSR_EEPROM_REG);
 767                 e[addr / 2] = cpu_to_le16(r >> 16);
 768         }
 769
 770         D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 771                  il_eeprom_query16(il, EEPROM_VERSION));
 772
 773         ret = 0;
 774 done:
 775         il->ops->lib->eeprom_release_semaphore(il);
 776
 777 err:
 778         if (ret)
 779                 il_eeprom_free(il);
 780         /* Reset chip to save power until we load uCode during "up". */
 781         il_apm_stop(il);
 782 alloc_err:
 783         return ret;
 784 }
 785 EXPORT_SYMBOL(il_eeprom_init);
 786
 787 void
 788 il_eeprom_free(struct il_priv *il)
 789 {
 790         kfree(il->eeprom);
 791         il->eeprom = NULL;
 792 }
 793 EXPORT_SYMBOL(il_eeprom_free);
 794
 795 static void
 796 il_init_band_reference(const struct il_priv *il, int eep_band,
 797                        int *eeprom_ch_count,
 798                        const struct il_eeprom_channel **eeprom_ch_info,
 799                        const u8 **eeprom_ch_idx)
 800 {
 801         u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 802
 803         switch (eep_band) {
 804         case 1:         /* 2.4GHz band */
 805                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 806                 *eeprom_ch_info =
 807                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 808                                                                      offset);
 809                 *eeprom_ch_idx = il_eeprom_band_1;
 810                 break;
 811         case 2:         /* 4.9GHz band */
 812                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 813                 *eeprom_ch_info =
 814                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 815                                                                      offset);
 816                 *eeprom_ch_idx = il_eeprom_band_2;
 817                 break;
 818         case 3:         /* 5.2GHz band */
 819                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 820                 *eeprom_ch_info =
 821                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 822                                                                      offset);
 823                 *eeprom_ch_idx = il_eeprom_band_3;
 824                 break;
 825         case 4:         /* 5.5GHz band */
 826                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 827                 *eeprom_ch_info =
 828                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 829                                                                      offset);
 830                 *eeprom_ch_idx = il_eeprom_band_4;
 831                 break;
 832         case 5:         /* 5.7GHz band */
 833                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 834                 *eeprom_ch_info =
 835                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 836                                                                      offset);
 837                 *eeprom_ch_idx = il_eeprom_band_5;
 838                 break;
 839         case 6:         /* 2.4GHz ht40 channels */
 840                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 841                 *eeprom_ch_info =
 842                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 843                                                                      offset);
 844                 *eeprom_ch_idx = il_eeprom_band_6;
 845                 break;
 846         case 7:         /* 5 GHz ht40 channels */
 847                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 848                 *eeprom_ch_info =
 849                     (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 850                                                                      offset);
 851                 *eeprom_ch_idx = il_eeprom_band_7;
 852                 break;
 853         default:
 854                 BUG();
 855         }
 856 }
 857
 858 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 859                             ? # x " " : "")
 860 /**
 861  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 862  *
 863  * Does not set up a command, or touch hardware.
 864  */
 865 static int
 866 il_mod_ht40_chan_info(struct il_priv *il, enum ieee80211_band band, u16 channel,
 867                       const struct il_eeprom_channel *eeprom_ch,
 868                       u8 clear_ht40_extension_channel)
 869 {
 870         struct il_channel_info *ch_info;
 871
 872         ch_info =
 873             (struct il_channel_info *)il_get_channel_info(il, band, channel);
 874
 875         if (!il_is_channel_valid(ch_info))
 876                 return -1;
 877
 878         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 879                  " Ad-Hoc %ssupported\n", ch_info->channel,
 880                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 881                  CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 882                  CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 883                  CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 884                  eeprom_ch->max_power_avg,
 885                  ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 886                   !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 887
 888         ch_info->ht40_eeprom = *eeprom_ch;
 889         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 890         ch_info->ht40_flags = eeprom_ch->flags;
 891         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 892                 ch_info->ht40_extension_channel &=
 893                     ~clear_ht40_extension_channel;
 894
 895         return 0;
 896 }
 897
 898 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 899                             ? # x " " : "")
 900
 901 /**
 902  * il_init_channel_map - Set up driver's info for all possible channels
 903  */
 904 int
 905 il_init_channel_map(struct il_priv *il)
 906 {
 907         int eeprom_ch_count = 0;
 908         const u8 *eeprom_ch_idx = NULL;
 909         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 910         int band, ch;
 911         struct il_channel_info *ch_info;
 912
 913         if (il->channel_count) {
 914                 D_EEPROM("Channel map already initialized.\n");
 915                 return 0;
 916         }
 917
 918         D_EEPROM("Initializing regulatory info from EEPROM\n");
 919
 920         il->channel_count =
 921             ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 922             ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 923             ARRAY_SIZE(il_eeprom_band_5);
 924
 925         D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 926
 927         il->channel_info =
 928             kzalloc(sizeof(struct il_channel_info) * il->channel_count,
 929                     GFP_KERNEL);
 930         if (!il->channel_info) {
 931                 IL_ERR("Could not allocate channel_info\n");
 932                 il->channel_count = 0;
 933                 return -ENOMEM;
 934         }
 935
 936         ch_info = il->channel_info;
 937
 938         /* Loop through the 5 EEPROM bands adding them in order to the
 939          * channel map we maintain (that contains additional information than
 940          * what just in the EEPROM) */
 941         for (band = 1; band <= 5; band++) {
 942
 943                 il_init_band_reference(il, band, &eeprom_ch_count,
 944                                        &eeprom_ch_info, &eeprom_ch_idx);
 945
 946                 /* Loop through each band adding each of the channels */
 947                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 948                         ch_info->channel = eeprom_ch_idx[ch];
 949                         ch_info->band =
 950                             (band ==
 951                              1) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 952
 953                         /* permanently store EEPROM's channel regulatory flags
 954                          *   and max power in channel info database. */
 955                         ch_info->eeprom = eeprom_ch_info[ch];
 956
 957                         /* Copy the run-time flags so they are there even on
 958                          * invalid channels */
 959                         ch_info->flags = eeprom_ch_info[ch].flags;
 960                         /* First write that ht40 is not enabled, and then enable
 961                          * one by one */
 962                         ch_info->ht40_extension_channel =
 963                             IEEE80211_CHAN_NO_HT40;
 964
 965                         if (!(il_is_channel_valid(ch_info))) {
 966                                 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 967                                          "No traffic\n", ch_info->channel,
 968                                          ch_info->flags,
 969                                          il_is_channel_a_band(ch_info) ? "5.2" :
 970                                          "2.4");
 971                                 ch_info++;
 972                                 continue;
 973                         }
 974
 975                         /* Initialize regulatory-based run-time data */
 976                         ch_info->max_power_avg = ch_info->curr_txpow =
 977                             eeprom_ch_info[ch].max_power_avg;
 978                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 979                         ch_info->min_power = 0;
 980
 981                         D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 982                                  " Ad-Hoc %ssupported\n", ch_info->channel,
 983                                  il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 984                                  CHECK_AND_PRINT_I(VALID),
 985                                  CHECK_AND_PRINT_I(IBSS),
 986                                  CHECK_AND_PRINT_I(ACTIVE),
 987                                  CHECK_AND_PRINT_I(RADAR),
 988                                  CHECK_AND_PRINT_I(WIDE),
 989                                  CHECK_AND_PRINT_I(DFS),
 990                                  eeprom_ch_info[ch].flags,
 991                                  eeprom_ch_info[ch].max_power_avg,
 992                                  ((eeprom_ch_info[ch].
 993                                    flags & EEPROM_CHANNEL_IBSS) &&
 994                                   !(eeprom_ch_info[ch].
 995                                     flags & EEPROM_CHANNEL_RADAR)) ? "" :
 996                                  "not ");
 997
 998                         ch_info++;
 999                 }
1000         }
1001
1002         /* Check if we do have HT40 channels */
1003         if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1004             il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1005                 return 0;
1006
1007         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1008         for (band = 6; band <= 7; band++) {
1009                 enum ieee80211_band ieeeband;
1010
1011                 il_init_band_reference(il, band, &eeprom_ch_count,
1012                                        &eeprom_ch_info, &eeprom_ch_idx);
1013
1014                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1015                 ieeeband =
1016                     (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1017
1018                 /* Loop through each band adding each of the channels */
1019                 for (ch = 0; ch < eeprom_ch_count; ch++) {
1020                         /* Set up driver's info for lower half */
1021                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1022                                               &eeprom_ch_info[ch],
1023                                               IEEE80211_CHAN_NO_HT40PLUS);
1024
1025                         /* Set up driver's info for upper half */
1026                         il_mod_ht40_chan_info(il, ieeeband,
1027                                               eeprom_ch_idx[ch] + 4,
1028                                               &eeprom_ch_info[ch],
1029                                               IEEE80211_CHAN_NO_HT40MINUS);
1030                 }
1031         }
1032
1033         return 0;
1034 }
1035 EXPORT_SYMBOL(il_init_channel_map);
1036
1037 /*
1038  * il_free_channel_map - undo allocations in il_init_channel_map
1039  */
1040 void
1041 il_free_channel_map(struct il_priv *il)
1042 {
1043         kfree(il->channel_info);
1044         il->channel_count = 0;
1045 }
1046 EXPORT_SYMBOL(il_free_channel_map);
1047
1048 /**
1049  * il_get_channel_info - Find driver's ilate channel info
1050  *
1051  * Based on band and channel number.
1052  */
1053 const struct il_channel_info *
1054 il_get_channel_info(const struct il_priv *il, enum ieee80211_band band,
1055                     u16 channel)
1056 {
1057         int i;
1058
1059         switch (band) {
1060         case IEEE80211_BAND_5GHZ:
1061                 for (i = 14; i < il->channel_count; i++) {
1062                         if (il->channel_info[i].channel == channel)
1063                                 return &il->channel_info[i];
1064                 }
1065                 break;
1066         case IEEE80211_BAND_2GHZ:
1067                 if (channel >= 1 && channel <= 14)
1068                         return &il->channel_info[channel - 1];
1069                 break;
1070         default:
1071                 BUG();
1072         }
1073
1074         return NULL;
1075 }
1076 EXPORT_SYMBOL(il_get_channel_info);
1077
1078 /*
1079  * Setting power level allows the card to go to sleep when not busy.
1080  *
1081  * We calculate a sleep command based on the required latency, which
1082  * we get from mac80211. In order to handle thermal throttling, we can
1083  * also use pre-defined power levels.
1084  */
1085
1086 /*
1087  * This defines the old power levels. They are still used by default
1088  * (level 1) and for thermal throttle (levels 3 through 5)
1089  */
1090
1091 struct il_power_vec_entry {
1092         struct il_powertable_cmd cmd;
1093         u8 no_dtim;             /* number of skip dtim */
1094 };
1095
1096 static void
1097 il_power_sleep_cam_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1098 {
1099         memset(cmd, 0, sizeof(*cmd));
1100
1101         if (il->power_data.pci_pm)
1102                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1103
1104         D_POWER("Sleep command for CAM\n");
1105 }
1106
1107 static int
1108 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1109 {
1110         D_POWER("Sending power/sleep command\n");
1111         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1112         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1113         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1114         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1115                 le32_to_cpu(cmd->sleep_interval[0]),
1116                 le32_to_cpu(cmd->sleep_interval[1]),
1117                 le32_to_cpu(cmd->sleep_interval[2]),
1118                 le32_to_cpu(cmd->sleep_interval[3]),
1119                 le32_to_cpu(cmd->sleep_interval[4]));
1120
1121         return il_send_cmd_pdu(il, C_POWER_TBL,
1122                                sizeof(struct il_powertable_cmd), cmd);
1123 }
1124
1125 int
1126 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1127 {
1128         int ret;
1129         bool update_chains;
1130
1131         lockdep_assert_held(&il->mutex);
1132
1133         /* Don't update the RX chain when chain noise calibration is running */
1134         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1135             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1136
1137         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1138                 return 0;
1139
1140         if (!il_is_ready_rf(il))
1141                 return -EIO;
1142
1143         /* scan complete use sleep_power_next, need to be updated */
1144         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1145         if (test_bit(S_SCANNING, &il->status) && !force) {
1146                 D_INFO("Defer power set mode while scanning\n");
1147                 return 0;
1148         }
1149
1150         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1151                 set_bit(S_POWER_PMI, &il->status);
1152
1153         ret = il_set_power(il, cmd);
1154         if (!ret) {
1155                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1156                         clear_bit(S_POWER_PMI, &il->status);
1157
1158                 if (il->ops->lib->update_chain_flags && update_chains)
1159                         il->ops->lib->update_chain_flags(il);
1160                 else if (il->ops->lib->update_chain_flags)
1161                         D_POWER("Cannot update the power, chain noise "
1162                                 "calibration running: %d\n",
1163                                 il->chain_noise_data.state);
1164
1165                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1166         } else
1167                 IL_ERR("set power fail, ret = %d", ret);
1168
1169         return ret;
1170 }
1171
1172 int
1173 il_power_update_mode(struct il_priv *il, bool force)
1174 {
1175         struct il_powertable_cmd cmd;
1176
1177         il_power_sleep_cam_cmd(il, &cmd);
1178         return il_power_set_mode(il, &cmd, force);
1179 }
1180 EXPORT_SYMBOL(il_power_update_mode);
1181
1182 /* initialize to default */
1183 void
1184 il_power_initialize(struct il_priv *il)
1185 {
1186         u16 lctl = il_pcie_link_ctl(il);
1187
1188         il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
1189
1190         il->power_data.debug_sleep_level_override = -1;
1191
1192         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1193 }
1194 EXPORT_SYMBOL(il_power_initialize);
1195
1196 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1197  * sending probe req.  This should be set long enough to hear probe responses
1198  * from more than one AP.  */
1199 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1200 #define IL_ACTIVE_DWELL_TIME_52    (20)
1201
1202 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1203 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1204
1205 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1206  * Must be set longer than active dwell time.
1207  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1208 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1209 #define IL_PASSIVE_DWELL_TIME_52   (10)
1210 #define IL_PASSIVE_DWELL_BASE      (100)
1211 #define IL_CHANNEL_TUNE_TIME       5
1212
1213 static int
1214 il_send_scan_abort(struct il_priv *il)
1215 {
1216         int ret;
1217         struct il_rx_pkt *pkt;
1218         struct il_host_cmd cmd = {
1219                 .id = C_SCAN_ABORT,
1220                 .flags = CMD_WANT_SKB,
1221         };
1222
1223         /* Exit instantly with error when device is not ready
1224          * to receive scan abort command or it does not perform
1225          * hardware scan currently */
1226         if (!test_bit(S_READY, &il->status) ||
1227             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1228             !test_bit(S_SCAN_HW, &il->status) ||
1229             test_bit(S_FW_ERROR, &il->status) ||
1230             test_bit(S_EXIT_PENDING, &il->status))
1231                 return -EIO;
1232
1233         ret = il_send_cmd_sync(il, &cmd);
1234         if (ret)
1235                 return ret;
1236
1237         pkt = (struct il_rx_pkt *)cmd.reply_page;
1238         if (pkt->u.status != CAN_ABORT_STATUS) {
1239                 /* The scan abort will return 1 for success or
1240                  * 2 for "failure".  A failure condition can be
1241                  * due to simply not being in an active scan which
1242                  * can occur if we send the scan abort before we
1243                  * the microcode has notified us that a scan is
1244                  * completed. */
1245                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1246                 ret = -EIO;
1247         }
1248
1249         il_free_pages(il, cmd.reply_page);
1250         return ret;
1251 }
1252
1253 static void
1254 il_complete_scan(struct il_priv *il, bool aborted)
1255 {
1256         /* check if scan was requested from mac80211 */
1257         if (il->scan_request) {
1258                 D_SCAN("Complete scan in mac80211\n");
1259                 ieee80211_scan_completed(il->hw, aborted);
1260         }
1261
1262         il->scan_vif = NULL;
1263         il->scan_request = NULL;
1264 }
1265
1266 void
1267 il_force_scan_end(struct il_priv *il)
1268 {
1269         lockdep_assert_held(&il->mutex);
1270
1271         if (!test_bit(S_SCANNING, &il->status)) {
1272                 D_SCAN("Forcing scan end while not scanning\n");
1273                 return;
1274         }
1275
1276         D_SCAN("Forcing scan end\n");
1277         clear_bit(S_SCANNING, &il->status);
1278         clear_bit(S_SCAN_HW, &il->status);
1279         clear_bit(S_SCAN_ABORTING, &il->status);
1280         il_complete_scan(il, true);
1281 }
1282
1283 static void
1284 il_do_scan_abort(struct il_priv *il)
1285 {
1286         int ret;
1287
1288         lockdep_assert_held(&il->mutex);
1289
1290         if (!test_bit(S_SCANNING, &il->status)) {
1291                 D_SCAN("Not performing scan to abort\n");
1292                 return;
1293         }
1294
1295         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1296                 D_SCAN("Scan abort in progress\n");
1297                 return;
1298         }
1299
1300         ret = il_send_scan_abort(il);
1301         if (ret) {
1302                 D_SCAN("Send scan abort failed %d\n", ret);
1303                 il_force_scan_end(il);
1304         } else
1305                 D_SCAN("Successfully send scan abort\n");
1306 }
1307
1308 /**
1309  * il_scan_cancel - Cancel any currently executing HW scan
1310  */
1311 int
1312 il_scan_cancel(struct il_priv *il)
1313 {
1314         D_SCAN("Queuing abort scan\n");
1315         queue_work(il->workqueue, &il->abort_scan);
1316         return 0;
1317 }
1318 EXPORT_SYMBOL(il_scan_cancel);
1319
1320 /**
1321  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1322  * @ms: amount of time to wait (in milliseconds) for scan to abort
1323  *
1324  */
1325 int
1326 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1327 {
1328         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1329
1330         lockdep_assert_held(&il->mutex);
1331
1332         D_SCAN("Scan cancel timeout\n");
1333
1334         il_do_scan_abort(il);
1335
1336         while (time_before_eq(jiffies, timeout)) {
1337                 if (!test_bit(S_SCAN_HW, &il->status))
1338                         break;
1339                 msleep(20);
1340         }
1341
1342         return test_bit(S_SCAN_HW, &il->status);
1343 }
1344 EXPORT_SYMBOL(il_scan_cancel_timeout);
1345
1346 /* Service response to C_SCAN (0x80) */
1347 static void
1348 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1349 {
1350 #ifdef CONFIG_IWLEGACY_DEBUG
1351         struct il_rx_pkt *pkt = rxb_addr(rxb);
1352         struct il_scanreq_notification *notif =
1353             (struct il_scanreq_notification *)pkt->u.raw;
1354
1355         D_SCAN("Scan request status = 0x%x\n", notif->status);
1356 #endif
1357 }
1358
1359 /* Service N_SCAN_START (0x82) */
1360 static void
1361 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1362 {
1363         struct il_rx_pkt *pkt = rxb_addr(rxb);
1364         struct il_scanstart_notification *notif =
1365             (struct il_scanstart_notification *)pkt->u.raw;
1366         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1367         D_SCAN("Scan start: " "%d [802.11%s] "
1368                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1369                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1370                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1371 }
1372
1373 /* Service N_SCAN_RESULTS (0x83) */
1374 static void
1375 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1376 {
1377 #ifdef CONFIG_IWLEGACY_DEBUG
1378         struct il_rx_pkt *pkt = rxb_addr(rxb);
1379         struct il_scanresults_notification *notif =
1380             (struct il_scanresults_notification *)pkt->u.raw;
1381
1382         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1383                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1384                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1385                le32_to_cpu(notif->stats[0]),
1386                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1387 #endif
1388 }
1389
1390 /* Service N_SCAN_COMPLETE (0x84) */
1391 static void
1392 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1393 {
1394
1395 #ifdef CONFIG_IWLEGACY_DEBUG
1396         struct il_rx_pkt *pkt = rxb_addr(rxb);
1397         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1398 #endif
1399
1400         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1401                scan_notif->scanned_channels, scan_notif->tsf_low,
1402                scan_notif->tsf_high, scan_notif->status);
1403
1404         /* The HW is no longer scanning */
1405         clear_bit(S_SCAN_HW, &il->status);
1406
1407         D_SCAN("Scan on %sGHz took %dms\n",
1408                (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1409                jiffies_to_msecs(jiffies - il->scan_start));
1410
1411         queue_work(il->workqueue, &il->scan_completed);
1412 }
1413
1414 void
1415 il_setup_rx_scan_handlers(struct il_priv *il)
1416 {
1417         /* scan handlers */
1418         il->handlers[C_SCAN] = il_hdl_scan;
1419         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1420         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1421         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1422 }
1423 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1424
1425 inline u16
1426 il_get_active_dwell_time(struct il_priv *il, enum ieee80211_band band,
1427                          u8 n_probes)
1428 {
1429         if (band == IEEE80211_BAND_5GHZ)
1430                 return IL_ACTIVE_DWELL_TIME_52 +
1431                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1432         else
1433                 return IL_ACTIVE_DWELL_TIME_24 +
1434                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1435 }
1436 EXPORT_SYMBOL(il_get_active_dwell_time);
1437
1438 u16
1439 il_get_passive_dwell_time(struct il_priv *il, enum ieee80211_band band,
1440                           struct ieee80211_vif *vif)
1441 {
1442         u16 value;
1443
1444         u16 passive =
1445             (band ==
1446              IEEE80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1447             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1448             IL_PASSIVE_DWELL_TIME_52;
1449
1450         if (il_is_any_associated(il)) {
1451                 /*
1452                  * If we're associated, we clamp the maximum passive
1453                  * dwell time to be 98% of the smallest beacon interval
1454                  * (minus 2 * channel tune time)
1455                  */
1456                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1457                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1458                         value = IL_PASSIVE_DWELL_BASE;
1459                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1460                 passive = min(value, passive);
1461         }
1462
1463         return passive;
1464 }
1465 EXPORT_SYMBOL(il_get_passive_dwell_time);
1466
1467 void
1468 il_init_scan_params(struct il_priv *il)
1469 {
1470         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1471         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1472                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1473         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1474                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1475 }
1476 EXPORT_SYMBOL(il_init_scan_params);
1477
1478 static int
1479 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1480 {
1481         int ret;
1482
1483         lockdep_assert_held(&il->mutex);
1484
1485         if (WARN_ON(!il->ops->utils->request_scan))
1486                 return -EOPNOTSUPP;
1487
1488         cancel_delayed_work(&il->scan_check);
1489
1490         if (!il_is_ready_rf(il)) {
1491                 IL_WARN("Request scan called when driver not ready.\n");
1492                 return -EIO;
1493         }
1494
1495         if (test_bit(S_SCAN_HW, &il->status)) {
1496                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1497                 return -EBUSY;
1498         }
1499
1500         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1501                 D_SCAN("Scan request while abort pending.\n");
1502                 return -EBUSY;
1503         }
1504
1505         D_SCAN("Starting scan...\n");
1506
1507         set_bit(S_SCANNING, &il->status);
1508         il->scan_start = jiffies;
1509
1510         ret = il->ops->utils->request_scan(il, vif);
1511         if (ret) {
1512                 clear_bit(S_SCANNING, &il->status);
1513                 return ret;
1514         }
1515
1516         queue_delayed_work(il->workqueue, &il->scan_check,
1517                            IL_SCAN_CHECK_WATCHDOG);
1518
1519         return 0;
1520 }
1521
1522 int
1523 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1524                struct cfg80211_scan_request *req)
1525 {
1526         struct il_priv *il = hw->priv;
1527         int ret;
1528
1529         D_MAC80211("enter\n");
1530
1531         if (req->n_channels == 0)
1532                 return -EINVAL;
1533
1534         mutex_lock(&il->mutex);
1535
1536         if (test_bit(S_SCANNING, &il->status)) {
1537                 D_SCAN("Scan already in progress.\n");
1538                 ret = -EAGAIN;
1539                 goto out_unlock;
1540         }
1541
1542         /* mac80211 will only ask for one band at a time */
1543         il->scan_request = req;
1544         il->scan_vif = vif;
1545         il->scan_band = req->channels[0]->band;
1546
1547         ret = il_scan_initiate(il, vif);
1548
1549         D_MAC80211("leave\n");
1550
1551 out_unlock:
1552         mutex_unlock(&il->mutex);
1553
1554         return ret;
1555 }
1556 EXPORT_SYMBOL(il_mac_hw_scan);
1557
1558 static void
1559 il_bg_scan_check(struct work_struct *data)
1560 {
1561         struct il_priv *il =
1562             container_of(data, struct il_priv, scan_check.work);
1563
1564         D_SCAN("Scan check work\n");
1565
1566         /* Since we are here firmware does not finish scan and
1567          * most likely is in bad shape, so we don't bother to
1568          * send abort command, just force scan complete to mac80211 */
1569         mutex_lock(&il->mutex);
1570         il_force_scan_end(il);
1571         mutex_unlock(&il->mutex);
1572 }
1573
1574 /**
1575  * il_fill_probe_req - fill in all required fields and IE for probe request
1576  */
1577
1578 u16
1579 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1580                   const u8 *ta, const u8 *ies, int ie_len, int left)
1581 {
1582         int len = 0;
1583         u8 *pos = NULL;
1584
1585         /* Make sure there is enough space for the probe request,
1586          * two mandatory IEs and the data */
1587         left -= 24;
1588         if (left < 0)
1589                 return 0;
1590
1591         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1592         memcpy(frame->da, il_bcast_addr, ETH_ALEN);
1593         memcpy(frame->sa, ta, ETH_ALEN);
1594         memcpy(frame->bssid, il_bcast_addr, ETH_ALEN);
1595         frame->seq_ctrl = 0;
1596
1597         len += 24;
1598
1599         /* ...next IE... */
1600         pos = &frame->u.probe_req.variable[0];
1601
1602         /* fill in our indirect SSID IE */
1603         left -= 2;
1604         if (left < 0)
1605                 return 0;
1606         *pos++ = WLAN_EID_SSID;
1607         *pos++ = 0;
1608
1609         len += 2;
1610
1611         if (WARN_ON(left < ie_len))
1612                 return len;
1613
1614         if (ies && ie_len) {
1615                 memcpy(pos, ies, ie_len);
1616                 len += ie_len;
1617         }
1618
1619         return (u16) len;
1620 }
1621 EXPORT_SYMBOL(il_fill_probe_req);
1622
1623 static void
1624 il_bg_abort_scan(struct work_struct *work)
1625 {
1626         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1627
1628         D_SCAN("Abort scan work\n");
1629
1630         /* We keep scan_check work queued in case when firmware will not
1631          * report back scan completed notification */
1632         mutex_lock(&il->mutex);
1633         il_scan_cancel_timeout(il, 200);
1634         mutex_unlock(&il->mutex);
1635 }
1636
1637 static void
1638 il_bg_scan_completed(struct work_struct *work)
1639 {
1640         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1641         bool aborted;
1642
1643         D_SCAN("Completed scan.\n");
1644
1645         cancel_delayed_work(&il->scan_check);
1646
1647         mutex_lock(&il->mutex);
1648
1649         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1650         if (aborted)
1651                 D_SCAN("Aborted scan completed.\n");
1652
1653         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1654                 D_SCAN("Scan already completed.\n");
1655                 goto out_settings;
1656         }
1657
1658         il_complete_scan(il, aborted);
1659
1660 out_settings:
1661         /* Can we still talk to firmware ? */
1662         if (!il_is_ready_rf(il))
1663                 goto out;
1664
1665         /*
1666          * We do not commit power settings while scan is pending,
1667          * do it now if the settings changed.
1668          */
1669         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1670         il_set_tx_power(il, il->tx_power_next, false);
1671
1672         il->ops->utils->post_scan(il);
1673
1674 out:
1675         mutex_unlock(&il->mutex);
1676 }
1677
1678 void
1679 il_setup_scan_deferred_work(struct il_priv *il)
1680 {
1681         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1682         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1683         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1684 }
1685 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1686
1687 void
1688 il_cancel_scan_deferred_work(struct il_priv *il)
1689 {
1690         cancel_work_sync(&il->abort_scan);
1691         cancel_work_sync(&il->scan_completed);
1692
1693         if (cancel_delayed_work_sync(&il->scan_check)) {
1694                 mutex_lock(&il->mutex);
1695                 il_force_scan_end(il);
1696                 mutex_unlock(&il->mutex);
1697         }
1698 }
1699 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1700
1701 /* il->sta_lock must be held */
1702 static void
1703 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1704 {
1705
1706         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1707                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1708                        sta_id, il->stations[sta_id].sta.sta.addr);
1709
1710         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1711                 D_ASSOC("STA id %u addr %pM already present"
1712                         " in uCode (according to driver)\n", sta_id,
1713                         il->stations[sta_id].sta.sta.addr);
1714         } else {
1715                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1716                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1717                         il->stations[sta_id].sta.sta.addr);
1718         }
1719 }
1720
1721 static int
1722 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1723                         struct il_rx_pkt *pkt, bool sync)
1724 {
1725         u8 sta_id = addsta->sta.sta_id;
1726         unsigned long flags;
1727         int ret = -EIO;
1728
1729         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1730                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1731                 return ret;
1732         }
1733
1734         D_INFO("Processing response for adding station %u\n", sta_id);
1735
1736         spin_lock_irqsave(&il->sta_lock, flags);
1737
1738         switch (pkt->u.add_sta.status) {
1739         case ADD_STA_SUCCESS_MSK:
1740                 D_INFO("C_ADD_STA PASSED\n");
1741                 il_sta_ucode_activate(il, sta_id);
1742                 ret = 0;
1743                 break;
1744         case ADD_STA_NO_ROOM_IN_TBL:
1745                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1746                 break;
1747         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1748                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1749                        sta_id);
1750                 break;
1751         case ADD_STA_MODIFY_NON_EXIST_STA:
1752                 IL_ERR("Attempting to modify non-existing station %d\n",
1753                        sta_id);
1754                 break;
1755         default:
1756                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1757                 break;
1758         }
1759
1760         D_INFO("%s station id %u addr %pM\n",
1761                il->stations[sta_id].sta.mode ==
1762                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1763                il->stations[sta_id].sta.sta.addr);
1764
1765         /*
1766          * XXX: The MAC address in the command buffer is often changed from
1767          * the original sent to the device. That is, the MAC address
1768          * written to the command buffer often is not the same MAC address
1769          * read from the command buffer when the command returns. This
1770          * issue has not yet been resolved and this debugging is left to
1771          * observe the problem.
1772          */
1773         D_INFO("%s station according to cmd buffer %pM\n",
1774                il->stations[sta_id].sta.mode ==
1775                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1776         spin_unlock_irqrestore(&il->sta_lock, flags);
1777
1778         return ret;
1779 }
1780
1781 static void
1782 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1783                     struct il_rx_pkt *pkt)
1784 {
1785         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1786
1787         il_process_add_sta_resp(il, addsta, pkt, false);
1788
1789 }
1790
1791 int
1792 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1793 {
1794         struct il_rx_pkt *pkt = NULL;
1795         int ret = 0;
1796         u8 data[sizeof(*sta)];
1797         struct il_host_cmd cmd = {
1798                 .id = C_ADD_STA,
1799                 .flags = flags,
1800                 .data = data,
1801         };
1802         u8 sta_id __maybe_unused = sta->sta.sta_id;
1803
1804         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1805                flags & CMD_ASYNC ? "a" : "");
1806
1807         if (flags & CMD_ASYNC)
1808                 cmd.callback = il_add_sta_callback;
1809         else {
1810                 cmd.flags |= CMD_WANT_SKB;
1811                 might_sleep();
1812         }
1813
1814         cmd.len = il->ops->utils->build_addsta_hcmd(sta, data);
1815         ret = il_send_cmd(il, &cmd);
1816
1817         if (ret || (flags & CMD_ASYNC))
1818                 return ret;
1819
1820         if (ret == 0) {
1821                 pkt = (struct il_rx_pkt *)cmd.reply_page;
1822                 ret = il_process_add_sta_resp(il, sta, pkt, true);
1823         }
1824         il_free_pages(il, cmd.reply_page);
1825
1826         return ret;
1827 }
1828 EXPORT_SYMBOL(il_send_add_sta);
1829
1830 static void
1831 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1832 {
1833         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1834         __le32 sta_flags;
1835         u8 mimo_ps_mode;
1836
1837         if (!sta || !sta_ht_inf->ht_supported)
1838                 goto done;
1839
1840         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
1841         D_ASSOC("spatial multiplexing power save mode: %s\n",
1842                 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? "static" :
1843                 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? "dynamic" :
1844                 "disabled");
1845
1846         sta_flags = il->stations[idx].sta.station_flags;
1847
1848         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1849
1850         switch (mimo_ps_mode) {
1851         case WLAN_HT_CAP_SM_PS_STATIC:
1852                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1853                 break;
1854         case WLAN_HT_CAP_SM_PS_DYNAMIC:
1855                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1856                 break;
1857         case WLAN_HT_CAP_SM_PS_DISABLED:
1858                 break;
1859         default:
1860                 IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode);
1861                 break;
1862         }
1863
1864         sta_flags |=
1865             cpu_to_le32((u32) sta_ht_inf->
1866                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1867
1868         sta_flags |=
1869             cpu_to_le32((u32) sta_ht_inf->
1870                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1871
1872         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1873                 sta_flags |= STA_FLG_HT40_EN_MSK;
1874         else
1875                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1876
1877         il->stations[idx].sta.station_flags = sta_flags;
1878 done:
1879         return;
1880 }
1881
1882 /**
1883  * il_prep_station - Prepare station information for addition
1884  *
1885  * should be called with sta_lock held
1886  */
1887 u8
1888 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1889                 struct ieee80211_sta *sta)
1890 {
1891         struct il_station_entry *station;
1892         int i;
1893         u8 sta_id = IL_INVALID_STATION;
1894         u16 rate;
1895
1896         if (is_ap)
1897                 sta_id = IL_AP_ID;
1898         else if (is_broadcast_ether_addr(addr))
1899                 sta_id = il->hw_params.bcast_id;
1900         else
1901                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1902                         if (!compare_ether_addr
1903                             (il->stations[i].sta.sta.addr, addr)) {
1904                                 sta_id = i;
1905                                 break;
1906                         }
1907
1908                         if (!il->stations[i].used &&
1909                             sta_id == IL_INVALID_STATION)
1910                                 sta_id = i;
1911                 }
1912
1913         /*
1914          * These two conditions have the same outcome, but keep them
1915          * separate
1916          */
1917         if (unlikely(sta_id == IL_INVALID_STATION))
1918                 return sta_id;
1919
1920         /*
1921          * uCode is not able to deal with multiple requests to add a
1922          * station. Keep track if one is in progress so that we do not send
1923          * another.
1924          */
1925         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1926                 D_INFO("STA %d already in process of being added.\n", sta_id);
1927                 return sta_id;
1928         }
1929
1930         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1931             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1932             !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) {
1933                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1934                         sta_id, addr);
1935                 return sta_id;
1936         }
1937
1938         station = &il->stations[sta_id];
1939         station->used = IL_STA_DRIVER_ACTIVE;
1940         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1941         il->num_stations++;
1942
1943         /* Set up the C_ADD_STA command to send to device */
1944         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1945         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1946         station->sta.mode = 0;
1947         station->sta.sta.sta_id = sta_id;
1948         station->sta.station_flags = 0;
1949
1950         /*
1951          * OK to call unconditionally, since local stations (IBSS BSSID
1952          * STA and broadcast STA) pass in a NULL sta, and mac80211
1953          * doesn't allow HT IBSS.
1954          */
1955         il_set_ht_add_station(il, sta_id, sta);
1956
1957         /* 3945 only */
1958         rate = (il->band == IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1959         /* Turn on both antennas for the station... */
1960         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1961
1962         return sta_id;
1963
1964 }
1965 EXPORT_SYMBOL_GPL(il_prep_station);
1966
1967 #define STA_WAIT_TIMEOUT (HZ/2)
1968
1969 /**
1970  * il_add_station_common -
1971  */
1972 int
1973 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
1974                       struct ieee80211_sta *sta, u8 *sta_id_r)
1975 {
1976         unsigned long flags_spin;
1977         int ret = 0;
1978         u8 sta_id;
1979         struct il_addsta_cmd sta_cmd;
1980
1981         *sta_id_r = 0;
1982         spin_lock_irqsave(&il->sta_lock, flags_spin);
1983         sta_id = il_prep_station(il, addr, is_ap, sta);
1984         if (sta_id == IL_INVALID_STATION) {
1985                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
1986                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1987                 return -EINVAL;
1988         }
1989
1990         /*
1991          * uCode is not able to deal with multiple requests to add a
1992          * station. Keep track if one is in progress so that we do not send
1993          * another.
1994          */
1995         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1996                 D_INFO("STA %d already in process of being added.\n", sta_id);
1997                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1998                 return -EEXIST;
1999         }
2000
2001         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2002             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2003                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2004                         sta_id, addr);
2005                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2006                 return -EEXIST;
2007         }
2008
2009         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2010         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2011                sizeof(struct il_addsta_cmd));
2012         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2013
2014         /* Add station to device's station table */
2015         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2016         if (ret) {
2017                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2018                 IL_ERR("Adding station %pM failed.\n",
2019                        il->stations[sta_id].sta.sta.addr);
2020                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2021                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2022                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2023         }
2024         *sta_id_r = sta_id;
2025         return ret;
2026 }
2027 EXPORT_SYMBOL(il_add_station_common);
2028
2029 /**
2030  * il_sta_ucode_deactivate - deactivate ucode status for a station
2031  *
2032  * il->sta_lock must be held
2033  */
2034 static void
2035 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2036 {
2037         /* Ucode must be active and driver must be non active */
2038         if ((il->stations[sta_id].
2039              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2040             IL_STA_UCODE_ACTIVE)
2041                 IL_ERR("removed non active STA %u\n", sta_id);
2042
2043         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2044
2045         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2046         D_ASSOC("Removed STA %u\n", sta_id);
2047 }
2048
2049 static int
2050 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2051                        bool temporary)
2052 {
2053         struct il_rx_pkt *pkt;
2054         int ret;
2055
2056         unsigned long flags_spin;
2057         struct il_rem_sta_cmd rm_sta_cmd;
2058
2059         struct il_host_cmd cmd = {
2060                 .id = C_REM_STA,
2061                 .len = sizeof(struct il_rem_sta_cmd),
2062                 .flags = CMD_SYNC,
2063                 .data = &rm_sta_cmd,
2064         };
2065
2066         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2067         rm_sta_cmd.num_sta = 1;
2068         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2069
2070         cmd.flags |= CMD_WANT_SKB;
2071
2072         ret = il_send_cmd(il, &cmd);
2073
2074         if (ret)
2075                 return ret;
2076
2077         pkt = (struct il_rx_pkt *)cmd.reply_page;
2078         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2079                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2080                 ret = -EIO;
2081         }
2082
2083         if (!ret) {
2084                 switch (pkt->u.rem_sta.status) {
2085                 case REM_STA_SUCCESS_MSK:
2086                         if (!temporary) {
2087                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2088                                 il_sta_ucode_deactivate(il, sta_id);
2089                                 spin_unlock_irqrestore(&il->sta_lock,
2090                                                        flags_spin);
2091                         }
2092                         D_ASSOC("C_REM_STA PASSED\n");
2093                         break;
2094                 default:
2095                         ret = -EIO;
2096                         IL_ERR("C_REM_STA failed\n");
2097                         break;
2098                 }
2099         }
2100         il_free_pages(il, cmd.reply_page);
2101
2102         return ret;
2103 }
2104
2105 /**
2106  * il_remove_station - Remove driver's knowledge of station.
2107  */
2108 int
2109 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2110 {
2111         unsigned long flags;
2112
2113         if (!il_is_ready(il)) {
2114                 D_INFO("Unable to remove station %pM, device not ready.\n",
2115                        addr);
2116                 /*
2117                  * It is typical for stations to be removed when we are
2118                  * going down. Return success since device will be down
2119                  * soon anyway
2120                  */
2121                 return 0;
2122         }
2123
2124         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2125
2126         if (WARN_ON(sta_id == IL_INVALID_STATION))
2127                 return -EINVAL;
2128
2129         spin_lock_irqsave(&il->sta_lock, flags);
2130
2131         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2132                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2133                 goto out_err;
2134         }
2135
2136         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2137                 D_INFO("Removing %pM but non UCODE active\n", addr);
2138                 goto out_err;
2139         }
2140
2141         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2142                 kfree(il->stations[sta_id].lq);
2143                 il->stations[sta_id].lq = NULL;
2144         }
2145
2146         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2147
2148         il->num_stations--;
2149
2150         BUG_ON(il->num_stations < 0);
2151
2152         spin_unlock_irqrestore(&il->sta_lock, flags);
2153
2154         return il_send_remove_station(il, addr, sta_id, false);
2155 out_err:
2156         spin_unlock_irqrestore(&il->sta_lock, flags);
2157         return -EINVAL;
2158 }
2159 EXPORT_SYMBOL_GPL(il_remove_station);
2160
2161 /**
2162  * il_clear_ucode_stations - clear ucode station table bits
2163  *
2164  * This function clears all the bits in the driver indicating
2165  * which stations are active in the ucode. Call when something
2166  * other than explicit station management would cause this in
2167  * the ucode, e.g. unassociated RXON.
2168  */
2169 void
2170 il_clear_ucode_stations(struct il_priv *il)
2171 {
2172         int i;
2173         unsigned long flags_spin;
2174         bool cleared = false;
2175
2176         D_INFO("Clearing ucode stations in driver\n");
2177
2178         spin_lock_irqsave(&il->sta_lock, flags_spin);
2179         for (i = 0; i < il->hw_params.max_stations; i++) {
2180                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2181                         D_INFO("Clearing ucode active for station %d\n", i);
2182                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2183                         cleared = true;
2184                 }
2185         }
2186         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2187
2188         if (!cleared)
2189                 D_INFO("No active stations found to be cleared\n");
2190 }
2191 EXPORT_SYMBOL(il_clear_ucode_stations);
2192
2193 /**
2194  * il_restore_stations() - Restore driver known stations to device
2195  *
2196  * All stations considered active by driver, but not present in ucode, is
2197  * restored.
2198  *
2199  * Function sleeps.
2200  */
2201 void
2202 il_restore_stations(struct il_priv *il)
2203 {
2204         struct il_addsta_cmd sta_cmd;
2205         struct il_link_quality_cmd lq;
2206         unsigned long flags_spin;
2207         int i;
2208         bool found = false;
2209         int ret;
2210         bool send_lq;
2211
2212         if (!il_is_ready(il)) {
2213                 D_INFO("Not ready yet, not restoring any stations.\n");
2214                 return;
2215         }
2216
2217         D_ASSOC("Restoring all known stations ... start.\n");
2218         spin_lock_irqsave(&il->sta_lock, flags_spin);
2219         for (i = 0; i < il->hw_params.max_stations; i++) {
2220                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2221                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2222                         D_ASSOC("Restoring sta %pM\n",
2223                                 il->stations[i].sta.sta.addr);
2224                         il->stations[i].sta.mode = 0;
2225                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2226                         found = true;
2227                 }
2228         }
2229
2230         for (i = 0; i < il->hw_params.max_stations; i++) {
2231                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2232                         memcpy(&sta_cmd, &il->stations[i].sta,
2233                                sizeof(struct il_addsta_cmd));
2234                         send_lq = false;
2235                         if (il->stations[i].lq) {
2236                                 memcpy(&lq, il->stations[i].lq,
2237                                        sizeof(struct il_link_quality_cmd));
2238                                 send_lq = true;
2239                         }
2240                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2241                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2242                         if (ret) {
2243                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2244                                 IL_ERR("Adding station %pM failed.\n",
2245                                        il->stations[i].sta.sta.addr);
2246                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2247                                 il->stations[i].used &=
2248                                     ~IL_STA_UCODE_INPROGRESS;
2249                                 spin_unlock_irqrestore(&il->sta_lock,
2250                                                        flags_spin);
2251                         }
2252                         /*
2253                          * Rate scaling has already been initialized, send
2254                          * current LQ command
2255                          */
2256                         if (send_lq)
2257                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2258                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2259                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2260                 }
2261         }
2262
2263         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2264         if (!found)
2265                 D_INFO("Restoring all known stations"
2266                        " .... no stations to be restored.\n");
2267         else
2268                 D_INFO("Restoring all known stations" " .... complete.\n");
2269 }
2270 EXPORT_SYMBOL(il_restore_stations);
2271
2272 int
2273 il_get_free_ucode_key_idx(struct il_priv *il)
2274 {
2275         int i;
2276
2277         for (i = 0; i < il->sta_key_max_num; i++)
2278                 if (!test_and_set_bit(i, &il->ucode_key_table))
2279                         return i;
2280
2281         return WEP_INVALID_OFFSET;
2282 }
2283 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2284
2285 void
2286 il_dealloc_bcast_stations(struct il_priv *il)
2287 {
2288         unsigned long flags;
2289         int i;
2290
2291         spin_lock_irqsave(&il->sta_lock, flags);
2292         for (i = 0; i < il->hw_params.max_stations; i++) {
2293                 if (!(il->stations[i].used & IL_STA_BCAST))
2294                         continue;
2295
2296                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2297                 il->num_stations--;
2298                 BUG_ON(il->num_stations < 0);
2299                 kfree(il->stations[i].lq);
2300                 il->stations[i].lq = NULL;
2301         }
2302         spin_unlock_irqrestore(&il->sta_lock, flags);
2303 }
2304 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2305
2306 #ifdef CONFIG_IWLEGACY_DEBUG
2307 static void
2308 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2309 {
2310         int i;
2311         D_RATE("lq station id 0x%x\n", lq->sta_id);
2312         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2313                lq->general_params.dual_stream_ant_msk);
2314
2315         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2316                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2317 }
2318 #else
2319 static inline void
2320 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2321 {
2322 }
2323 #endif
2324
2325 /**
2326  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2327  *
2328  * It sometimes happens when a HT rate has been in use and we
2329  * loose connectivity with AP then mac80211 will first tell us that the
2330  * current channel is not HT anymore before removing the station. In such a
2331  * scenario the RXON flags will be updated to indicate we are not
2332  * communicating HT anymore, but the LQ command may still contain HT rates.
2333  * Test for this to prevent driver from sending LQ command between the time
2334  * RXON flags are updated and when LQ command is updated.
2335  */
2336 static bool
2337 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2338 {
2339         int i;
2340
2341         if (il->ht.enabled)
2342                 return true;
2343
2344         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2345         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2346                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2347                         D_INFO("idx %d of LQ expects HT channel\n", i);
2348                         return false;
2349                 }
2350         }
2351         return true;
2352 }
2353
2354 /**
2355  * il_send_lq_cmd() - Send link quality command
2356  * @init: This command is sent as part of station initialization right
2357  *        after station has been added.
2358  *
2359  * The link quality command is sent as the last step of station creation.
2360  * This is the special case in which init is set and we call a callback in
2361  * this case to clear the state indicating that station creation is in
2362  * progress.
2363  */
2364 int
2365 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2366                u8 flags, bool init)
2367 {
2368         int ret = 0;
2369         unsigned long flags_spin;
2370
2371         struct il_host_cmd cmd = {
2372                 .id = C_TX_LINK_QUALITY_CMD,
2373                 .len = sizeof(struct il_link_quality_cmd),
2374                 .flags = flags,
2375                 .data = lq,
2376         };
2377
2378         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2379                 return -EINVAL;
2380
2381         spin_lock_irqsave(&il->sta_lock, flags_spin);
2382         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2383                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2384                 return -EINVAL;
2385         }
2386         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2387
2388         il_dump_lq_cmd(il, lq);
2389         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2390
2391         if (il_is_lq_table_valid(il, lq))
2392                 ret = il_send_cmd(il, &cmd);
2393         else
2394                 ret = -EINVAL;
2395
2396         if (cmd.flags & CMD_ASYNC)
2397                 return ret;
2398
2399         if (init) {
2400                 D_INFO("init LQ command complete,"
2401                        " clearing sta addition status for sta %d\n",
2402                        lq->sta_id);
2403                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2404                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2405                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2406         }
2407         return ret;
2408 }
2409 EXPORT_SYMBOL(il_send_lq_cmd);
2410
2411 int
2412 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2413                   struct ieee80211_sta *sta)
2414 {
2415         struct il_priv *il = hw->priv;
2416         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2417         int ret;
2418
2419         D_INFO("received request to remove station %pM\n", sta->addr);
2420         mutex_lock(&il->mutex);
2421         D_INFO("proceeding to remove station %pM\n", sta->addr);
2422         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2423         if (ret)
2424                 IL_ERR("Error removing station %pM\n", sta->addr);
2425         mutex_unlock(&il->mutex);
2426         return ret;
2427 }
2428 EXPORT_SYMBOL(il_mac_sta_remove);
2429
2430 /************************** RX-FUNCTIONS ****************************/
2431 /*
2432  * Rx theory of operation
2433  *
2434  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2435  * each of which point to Receive Buffers to be filled by the NIC.  These get
2436  * used not only for Rx frames, but for any command response or notification
2437  * from the NIC.  The driver and NIC manage the Rx buffers by means
2438  * of idxes into the circular buffer.
2439  *
2440  * Rx Queue Indexes
2441  * The host/firmware share two idx registers for managing the Rx buffers.
2442  *
2443  * The READ idx maps to the first position that the firmware may be writing
2444  * to -- the driver can read up to (but not including) this position and get
2445  * good data.
2446  * The READ idx is managed by the firmware once the card is enabled.
2447  *
2448  * The WRITE idx maps to the last position the driver has read from -- the
2449  * position preceding WRITE is the last slot the firmware can place a packet.
2450  *
2451  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2452  * WRITE = READ.
2453  *
2454  * During initialization, the host sets up the READ queue position to the first
2455  * IDX position, and WRITE to the last (READ - 1 wrapped)
2456  *
2457  * When the firmware places a packet in a buffer, it will advance the READ idx
2458  * and fire the RX interrupt.  The driver can then query the READ idx and
2459  * process as many packets as possible, moving the WRITE idx forward as it
2460  * resets the Rx queue buffers with new memory.
2461  *
2462  * The management in the driver is as follows:
2463  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2464  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2465  *   to replenish the iwl->rxq->rx_free.
2466  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2467  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2468  *   'processed' and 'read' driver idxes as well)
2469  * + A received packet is processed and handed to the kernel network stack,
2470  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2471  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2472  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2473  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2474  *   were enough free buffers and RX_STALLED is set it is cleared.
2475  *
2476  *
2477  * Driver sequence:
2478  *
2479  * il_rx_queue_alloc()   Allocates rx_free
2480  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2481  *                            il_rx_queue_restock
2482  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2483  *                            queue, updates firmware pointers, and updates
2484  *                            the WRITE idx.  If insufficient rx_free buffers
2485  *                            are available, schedules il_rx_replenish
2486  *
2487  * -- enable interrupts --
2488  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2489  *                            READ IDX, detaching the SKB from the pool.
2490  *                            Moves the packet buffer from queue to rx_used.
2491  *                            Calls il_rx_queue_restock to refill any empty
2492  *                            slots.
2493  * ...
2494  *
2495  */
2496
2497 /**
2498  * il_rx_queue_space - Return number of free slots available in queue.
2499  */
2500 int
2501 il_rx_queue_space(const struct il_rx_queue *q)
2502 {
2503         int s = q->read - q->write;
2504         if (s <= 0)
2505                 s += RX_QUEUE_SIZE;
2506         /* keep some buffer to not confuse full and empty queue */
2507         s -= 2;
2508         if (s < 0)
2509                 s = 0;
2510         return s;
2511 }
2512 EXPORT_SYMBOL(il_rx_queue_space);
2513
2514 /**
2515  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2516  */
2517 void
2518 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2519 {
2520         unsigned long flags;
2521         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2522         u32 reg;
2523
2524         spin_lock_irqsave(&q->lock, flags);
2525
2526         if (q->need_update == 0)
2527                 goto exit_unlock;
2528
2529         /* If power-saving is in use, make sure device is awake */
2530         if (test_bit(S_POWER_PMI, &il->status)) {
2531                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2532
2533                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2534                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2535                                reg);
2536                         il_set_bit(il, CSR_GP_CNTRL,
2537                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2538                         goto exit_unlock;
2539                 }
2540
2541                 q->write_actual = (q->write & ~0x7);
2542                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2543
2544                 /* Else device is assumed to be awake */
2545         } else {
2546                 /* Device expects a multiple of 8 */
2547                 q->write_actual = (q->write & ~0x7);
2548                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2549         }
2550
2551         q->need_update = 0;
2552
2553 exit_unlock:
2554         spin_unlock_irqrestore(&q->lock, flags);
2555 }
2556 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2557
2558 int
2559 il_rx_queue_alloc(struct il_priv *il)
2560 {
2561         struct il_rx_queue *rxq = &il->rxq;
2562         struct device *dev = &il->pci_dev->dev;
2563         int i;
2564
2565         spin_lock_init(&rxq->lock);
2566         INIT_LIST_HEAD(&rxq->rx_free);
2567         INIT_LIST_HEAD(&rxq->rx_used);
2568
2569         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2570         rxq->bd =
2571             dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2572                                GFP_KERNEL);
2573         if (!rxq->bd)
2574                 goto err_bd;
2575
2576         rxq->rb_stts =
2577             dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2578                                &rxq->rb_stts_dma, GFP_KERNEL);
2579         if (!rxq->rb_stts)
2580                 goto err_rb;
2581
2582         /* Fill the rx_used queue with _all_ of the Rx buffers */
2583         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2584                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2585
2586         /* Set us so that we have processed and used all buffers, but have
2587          * not restocked the Rx queue with fresh buffers */
2588         rxq->read = rxq->write = 0;
2589         rxq->write_actual = 0;
2590         rxq->free_count = 0;
2591         rxq->need_update = 0;
2592         return 0;
2593
2594 err_rb:
2595         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2596                           rxq->bd_dma);
2597 err_bd:
2598         return -ENOMEM;
2599 }
2600 EXPORT_SYMBOL(il_rx_queue_alloc);
2601
2602 void
2603 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2604 {
2605         struct il_rx_pkt *pkt = rxb_addr(rxb);
2606         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2607
2608         if (!report->state) {
2609                 D_11H("Spectrum Measure Notification: Start\n");
2610                 return;
2611         }
2612
2613         memcpy(&il->measure_report, report, sizeof(*report));
2614         il->measurement_status |= MEASUREMENT_READY;
2615 }
2616 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2617
2618 /*
2619  * returns non-zero if packet should be dropped
2620  */
2621 int
2622 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2623                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2624 {
2625         u16 fc = le16_to_cpu(hdr->frame_control);
2626
2627         /*
2628          * All contexts have the same setting here due to it being
2629          * a module parameter, so OK to check any context.
2630          */
2631         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2632                 return 0;
2633
2634         if (!(fc & IEEE80211_FCTL_PROTECTED))
2635                 return 0;
2636
2637         D_RX("decrypt_res:0x%x\n", decrypt_res);
2638         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2639         case RX_RES_STATUS_SEC_TYPE_TKIP:
2640                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2641                  * Decryption will be done in SW. */
2642                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2643                     RX_RES_STATUS_BAD_KEY_TTAK)
2644                         break;
2645
2646         case RX_RES_STATUS_SEC_TYPE_WEP:
2647                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2648                     RX_RES_STATUS_BAD_ICV_MIC) {
2649                         /* bad ICV, the packet is destroyed since the
2650                          * decryption is inplace, drop it */
2651                         D_RX("Packet destroyed\n");
2652                         return -1;
2653                 }
2654         case RX_RES_STATUS_SEC_TYPE_CCMP:
2655                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2656                     RX_RES_STATUS_DECRYPT_OK) {
2657                         D_RX("hw decrypt successfully!!!\n");
2658                         stats->flag |= RX_FLAG_DECRYPTED;
2659                 }
2660                 break;
2661
2662         default:
2663                 break;
2664         }
2665         return 0;
2666 }
2667 EXPORT_SYMBOL(il_set_decrypted_flag);
2668
2669 /**
2670  * il_txq_update_write_ptr - Send new write idx to hardware
2671  */
2672 void
2673 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2674 {
2675         u32 reg = 0;
2676         int txq_id = txq->q.id;
2677
2678         if (txq->need_update == 0)
2679                 return;
2680
2681         /* if we're trying to save power */
2682         if (test_bit(S_POWER_PMI, &il->status)) {
2683                 /* wake up nic if it's powered down ...
2684                  * uCode will wake up, and interrupt us again, so next
2685                  * time we'll skip this part. */
2686                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2687
2688                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2689                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2690                                txq_id, reg);
2691                         il_set_bit(il, CSR_GP_CNTRL,
2692                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2693                         return;
2694                 }
2695
2696                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2697
2698                 /*
2699                  * else not in power-save mode,
2700                  * uCode will never sleep when we're
2701                  * trying to tx (during RFKILL, we're not trying to tx).
2702                  */
2703         } else
2704                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2705         txq->need_update = 0;
2706 }
2707 EXPORT_SYMBOL(il_txq_update_write_ptr);
2708
2709 /**
2710  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2711  */
2712 void
2713 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2714 {
2715         struct il_tx_queue *txq = &il->txq[txq_id];
2716         struct il_queue *q = &txq->q;
2717
2718         if (q->n_bd == 0)
2719                 return;
2720
2721         while (q->write_ptr != q->read_ptr) {
2722                 il->ops->lib->txq_free_tfd(il, txq);
2723                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2724         }
2725 }
2726 EXPORT_SYMBOL(il_tx_queue_unmap);
2727
2728 /**
2729  * il_tx_queue_free - Deallocate DMA queue.
2730  * @txq: Transmit queue to deallocate.
2731  *
2732  * Empty queue by removing and destroying all BD's.
2733  * Free all buffers.
2734  * 0-fill, but do not free "txq" descriptor structure.
2735  */
2736 void
2737 il_tx_queue_free(struct il_priv *il, int txq_id)
2738 {
2739         struct il_tx_queue *txq = &il->txq[txq_id];
2740         struct device *dev = &il->pci_dev->dev;
2741         int i;
2742
2743         il_tx_queue_unmap(il, txq_id);
2744
2745         /* De-alloc array of command/tx buffers */
2746         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2747                 kfree(txq->cmd[i]);
2748
2749         /* De-alloc circular buffer of TFDs */
2750         if (txq->q.n_bd)
2751                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2752                                   txq->tfds, txq->q.dma_addr);
2753
2754         /* De-alloc array of per-TFD driver data */
2755         kfree(txq->skbs);
2756         txq->skbs = NULL;
2757
2758         /* deallocate arrays */
2759         kfree(txq->cmd);
2760         kfree(txq->meta);
2761         txq->cmd = NULL;
2762         txq->meta = NULL;
2763
2764         /* 0-fill queue descriptor structure */
2765         memset(txq, 0, sizeof(*txq));
2766 }
2767 EXPORT_SYMBOL(il_tx_queue_free);
2768
2769 /**
2770  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2771  */
2772 void
2773 il_cmd_queue_unmap(struct il_priv *il)
2774 {
2775         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2776         struct il_queue *q = &txq->q;
2777         int i;
2778
2779         if (q->n_bd == 0)
2780                 return;
2781
2782         while (q->read_ptr != q->write_ptr) {
2783                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2784
2785                 if (txq->meta[i].flags & CMD_MAPPED) {
2786                         pci_unmap_single(il->pci_dev,
2787                                          dma_unmap_addr(&txq->meta[i], mapping),
2788                                          dma_unmap_len(&txq->meta[i], len),
2789                                          PCI_DMA_BIDIRECTIONAL);
2790                         txq->meta[i].flags = 0;
2791                 }
2792
2793                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2794         }
2795
2796         i = q->n_win;
2797         if (txq->meta[i].flags & CMD_MAPPED) {
2798                 pci_unmap_single(il->pci_dev,
2799                                  dma_unmap_addr(&txq->meta[i], mapping),
2800                                  dma_unmap_len(&txq->meta[i], len),
2801                                  PCI_DMA_BIDIRECTIONAL);
2802                 txq->meta[i].flags = 0;
2803         }
2804 }
2805 EXPORT_SYMBOL(il_cmd_queue_unmap);
2806
2807 /**
2808  * il_cmd_queue_free - Deallocate DMA queue.
2809  * @txq: Transmit queue to deallocate.
2810  *
2811  * Empty queue by removing and destroying all BD's.
2812  * Free all buffers.
2813  * 0-fill, but do not free "txq" descriptor structure.
2814  */
2815 void
2816 il_cmd_queue_free(struct il_priv *il)
2817 {
2818         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2819         struct device *dev = &il->pci_dev->dev;
2820         int i;
2821
2822         il_cmd_queue_unmap(il);
2823
2824         /* De-alloc array of command/tx buffers */
2825         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2826                 kfree(txq->cmd[i]);
2827
2828         /* De-alloc circular buffer of TFDs */
2829         if (txq->q.n_bd)
2830                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2831                                   txq->tfds, txq->q.dma_addr);
2832
2833         /* deallocate arrays */
2834         kfree(txq->cmd);
2835         kfree(txq->meta);
2836         txq->cmd = NULL;
2837         txq->meta = NULL;
2838
2839         /* 0-fill queue descriptor structure */
2840         memset(txq, 0, sizeof(*txq));
2841 }
2842 EXPORT_SYMBOL(il_cmd_queue_free);
2843
2844 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2845  * DMA services
2846  *
2847  * Theory of operation
2848  *
2849  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2850  * of buffer descriptors, each of which points to one or more data buffers for
2851  * the device to read from or fill.  Driver and device exchange status of each
2852  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2853  * entries in each circular buffer, to protect against confusing empty and full
2854  * queue states.
2855  *
2856  * The device reads or writes the data in the queues via the device's several
2857  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2858  *
2859  * For Tx queue, there are low mark and high mark limits. If, after queuing
2860  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2861  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2862  * Tx queue resumed.
2863  *
2864  * See more detailed info in 4965.h.
2865  ***************************************************/
2866
2867 int
2868 il_queue_space(const struct il_queue *q)
2869 {
2870         int s = q->read_ptr - q->write_ptr;
2871
2872         if (q->read_ptr > q->write_ptr)
2873                 s -= q->n_bd;
2874
2875         if (s <= 0)
2876                 s += q->n_win;
2877         /* keep some reserve to not confuse empty and full situations */
2878         s -= 2;
2879         if (s < 0)
2880                 s = 0;
2881         return s;
2882 }
2883 EXPORT_SYMBOL(il_queue_space);
2884
2885
2886 /**
2887  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2888  */
2889 static int
2890 il_queue_init(struct il_priv *il, struct il_queue *q, int count, int slots_num,
2891               u32 id)
2892 {
2893         q->n_bd = count;
2894         q->n_win = slots_num;
2895         q->id = id;
2896
2897         /* count must be power-of-two size, otherwise il_queue_inc_wrap
2898          * and il_queue_dec_wrap are broken. */
2899         BUG_ON(!is_power_of_2(count));
2900
2901         /* slots_num must be power-of-two size, otherwise
2902          * il_get_cmd_idx is broken. */
2903         BUG_ON(!is_power_of_2(slots_num));
2904
2905         q->low_mark = q->n_win / 4;
2906         if (q->low_mark < 4)
2907                 q->low_mark = 4;
2908
2909         q->high_mark = q->n_win / 8;
2910         if (q->high_mark < 2)
2911                 q->high_mark = 2;
2912
2913         q->write_ptr = q->read_ptr = 0;
2914
2915         return 0;
2916 }
2917
2918 /**
2919  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2920  */
2921 static int
2922 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2923 {
2924         struct device *dev = &il->pci_dev->dev;
2925         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2926
2927         /* Driver ilate data, only for Tx (not command) queues,
2928          * not shared with device. */
2929         if (id != il->cmd_queue) {
2930                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(struct skb *),
2931                                     GFP_KERNEL);
2932                 if (!txq->skbs) {
2933                         IL_ERR("Fail to alloc skbs\n");
2934                         goto error;
2935                 }
2936         } else
2937                 txq->skbs = NULL;
2938
2939         /* Circular buffer of transmit frame descriptors (TFDs),
2940          * shared with device */
2941         txq->tfds =
2942             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2943         if (!txq->tfds) {
2944                 IL_ERR("Fail to alloc TFDs\n");
2945                 goto error;
2946         }
2947         txq->q.id = id;
2948
2949         return 0;
2950
2951 error:
2952         kfree(txq->skbs);
2953         txq->skbs = NULL;
2954
2955         return -ENOMEM;
2956 }
2957
2958 /**
2959  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2960  */
2961 int
2962 il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
2963                  u32 txq_id)
2964 {
2965         int i, len;
2966         int ret;
2967         int actual_slots = slots_num;
2968
2969         /*
2970          * Alloc buffer array for commands (Tx or other types of commands).
2971          * For the command queue (#4/#9), allocate command space + one big
2972          * command for scan, since scan command is very huge; the system will
2973          * not have two scans at the same time, so only one is needed.
2974          * For normal Tx queues (all other queues), no super-size command
2975          * space is needed.
2976          */
2977         if (txq_id == il->cmd_queue)
2978                 actual_slots++;
2979
2980         txq->meta =
2981             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
2982         txq->cmd =
2983             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
2984
2985         if (!txq->meta || !txq->cmd)
2986                 goto out_free_arrays;
2987
2988         len = sizeof(struct il_device_cmd);
2989         for (i = 0; i < actual_slots; i++) {
2990                 /* only happens for cmd queue */
2991                 if (i == slots_num)
2992                         len = IL_MAX_CMD_SIZE;
2993
2994                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
2995                 if (!txq->cmd[i])
2996                         goto err;
2997         }
2998
2999         /* Alloc driver data array and TFD circular buffer */
3000         ret = il_tx_queue_alloc(il, txq, txq_id);
3001         if (ret)
3002                 goto err;
3003
3004         txq->need_update = 0;
3005
3006         /*
3007          * For the default queues 0-3, set up the swq_id
3008          * already -- all others need to get one later
3009          * (if they need one at all).
3010          */
3011         if (txq_id < 4)
3012                 il_set_swq_id(txq, txq_id, txq_id);
3013
3014         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
3015          * il_queue_inc_wrap and il_queue_dec_wrap are broken. */
3016         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
3017
3018         /* Initialize queue's high/low-water marks, and head/tail idxes */
3019         il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
3020
3021         /* Tell device where to find queue */
3022         il->ops->lib->txq_init(il, txq);
3023
3024         return 0;
3025 err:
3026         for (i = 0; i < actual_slots; i++)
3027                 kfree(txq->cmd[i]);
3028 out_free_arrays:
3029         kfree(txq->meta);
3030         kfree(txq->cmd);
3031
3032         return -ENOMEM;
3033 }
3034 EXPORT_SYMBOL(il_tx_queue_init);
3035
3036 void
3037 il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
3038                   u32 txq_id)
3039 {
3040         int actual_slots = slots_num;
3041
3042         if (txq_id == il->cmd_queue)
3043                 actual_slots++;
3044
3045         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3046
3047         txq->need_update = 0;
3048
3049         /* Initialize queue's high/low-water marks, and head/tail idxes */
3050         il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
3051
3052         /* Tell device where to find queue */
3053         il->ops->lib->txq_init(il, txq);
3054 }
3055 EXPORT_SYMBOL(il_tx_queue_reset);
3056
3057 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3058
3059 /**
3060  * il_enqueue_hcmd - enqueue a uCode command
3061  * @il: device ilate data point
3062  * @cmd: a point to the ucode command structure
3063  *
3064  * The function returns < 0 values to indicate the operation is
3065  * failed. On success, it turns the idx (> 0) of command in the
3066  * command queue.
3067  */
3068 int
3069 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3070 {
3071         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3072         struct il_queue *q = &txq->q;
3073         struct il_device_cmd *out_cmd;
3074         struct il_cmd_meta *out_meta;
3075         dma_addr_t phys_addr;
3076         unsigned long flags;
3077         int len;
3078         u32 idx;
3079         u16 fix_size;
3080
3081         cmd->len = il->ops->utils->get_hcmd_size(cmd->id, cmd->len);
3082         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3083
3084         /* If any of the command structures end up being larger than
3085          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3086          * we will need to increase the size of the TFD entries
3087          * Also, check to see if command buffer should not exceed the size
3088          * of device_cmd and max_cmd_size. */
3089         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3090                !(cmd->flags & CMD_SIZE_HUGE));
3091         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3092
3093         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3094                 IL_WARN("Not sending command - %s KILL\n",
3095                         il_is_rfkill(il) ? "RF" : "CT");
3096                 return -EIO;
3097         }
3098
3099         spin_lock_irqsave(&il->hcmd_lock, flags);
3100
3101         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3102                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3103
3104                 IL_ERR("Restarting adapter due to command queue full\n");
3105                 queue_work(il->workqueue, &il->restart);
3106                 return -ENOSPC;
3107         }
3108
3109         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3110         out_cmd = txq->cmd[idx];
3111         out_meta = &txq->meta[idx];
3112
3113         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3114                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3115                 return -ENOSPC;
3116         }
3117
3118         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3119         out_meta->flags = cmd->flags | CMD_MAPPED;
3120         if (cmd->flags & CMD_WANT_SKB)
3121                 out_meta->source = cmd;
3122         if (cmd->flags & CMD_ASYNC)
3123                 out_meta->callback = cmd->callback;
3124
3125         out_cmd->hdr.cmd = cmd->id;
3126         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3127
3128         /* At this point, the out_cmd now has all of the incoming cmd
3129          * information */
3130
3131         out_cmd->hdr.flags = 0;
3132         out_cmd->hdr.sequence =
3133             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3134         if (cmd->flags & CMD_SIZE_HUGE)
3135                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3136         len = sizeof(struct il_device_cmd);
3137         if (idx == TFD_CMD_SLOTS)
3138                 len = IL_MAX_CMD_SIZE;
3139
3140 #ifdef CONFIG_IWLEGACY_DEBUG
3141         switch (out_cmd->hdr.cmd) {
3142         case C_TX_LINK_QUALITY_CMD:
3143         case C_SENSITIVITY:
3144                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3145                           "%d bytes at %d[%d]:%d\n",
3146                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3147                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3148                           q->write_ptr, idx, il->cmd_queue);
3149                 break;
3150         default:
3151                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3152                      "%d bytes at %d[%d]:%d\n",
3153                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3154                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3155                      idx, il->cmd_queue);
3156         }
3157 #endif
3158         txq->need_update = 1;
3159
3160         if (il->ops->lib->txq_update_byte_cnt_tbl)
3161                 /* Set up entry in queue's byte count circular buffer */
3162                 il->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0);
3163
3164         phys_addr =
3165             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3166                            PCI_DMA_BIDIRECTIONAL);
3167         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3168         dma_unmap_len_set(out_meta, len, fix_size);
3169
3170         il->ops->lib->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3171                                             U32_PAD(cmd->len));
3172
3173         /* Increment and update queue's write idx */
3174         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3175         il_txq_update_write_ptr(il, txq);
3176
3177         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3178         return idx;
3179 }
3180
3181 /**
3182  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3183  *
3184  * When FW advances 'R' idx, all entries between old and new 'R' idx
3185  * need to be reclaimed. As result, some free space forms.  If there is
3186  * enough free space (> low mark), wake the stack that feeds us.
3187  */
3188 static void
3189 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3190 {
3191         struct il_tx_queue *txq = &il->txq[txq_id];
3192         struct il_queue *q = &txq->q;
3193         int nfreed = 0;
3194
3195         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3196                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3197                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3198                        q->write_ptr, q->read_ptr);
3199                 return;
3200         }
3201
3202         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3203              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3204
3205                 if (nfreed++ > 0) {
3206                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3207                                q->write_ptr, q->read_ptr);
3208                         queue_work(il->workqueue, &il->restart);
3209                 }
3210
3211         }
3212 }
3213
3214 /**
3215  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3216  * @rxb: Rx buffer to reclaim
3217  *
3218  * If an Rx buffer has an async callback associated with it the callback
3219  * will be executed.  The attached skb (if present) will only be freed
3220  * if the callback returns 1
3221  */
3222 void
3223 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3224 {
3225         struct il_rx_pkt *pkt = rxb_addr(rxb);
3226         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3227         int txq_id = SEQ_TO_QUEUE(sequence);
3228         int idx = SEQ_TO_IDX(sequence);
3229         int cmd_idx;
3230         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3231         struct il_device_cmd *cmd;
3232         struct il_cmd_meta *meta;
3233         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3234         unsigned long flags;
3235
3236         /* If a Tx command is being handled and it isn't in the actual
3237          * command queue then there a command routing bug has been introduced
3238          * in the queue management code. */
3239         if (WARN
3240             (txq_id != il->cmd_queue,
3241              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3242              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3243              il->txq[il->cmd_queue].q.write_ptr)) {
3244                 il_print_hex_error(il, pkt, 32);
3245                 return;
3246         }
3247
3248         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3249         cmd = txq->cmd[cmd_idx];
3250         meta = &txq->meta[cmd_idx];
3251
3252         txq->time_stamp = jiffies;
3253
3254         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3255                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3256
3257         /* Input error checking is done when commands are added to queue. */
3258         if (meta->flags & CMD_WANT_SKB) {
3259                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3260                 rxb->page = NULL;
3261         } else if (meta->callback)
3262                 meta->callback(il, cmd, pkt);
3263
3264         spin_lock_irqsave(&il->hcmd_lock, flags);
3265
3266         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3267
3268         if (!(meta->flags & CMD_ASYNC)) {
3269                 clear_bit(S_HCMD_ACTIVE, &il->status);
3270                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3271                        il_get_cmd_string(cmd->hdr.cmd));
3272                 wake_up(&il->wait_command_queue);
3273         }
3274
3275         /* Mark as unmapped */
3276         meta->flags = 0;
3277
3278         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3279 }
3280 EXPORT_SYMBOL(il_tx_cmd_complete);
3281
3282 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3283 MODULE_VERSION(IWLWIFI_VERSION);
3284 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3285 MODULE_LICENSE("GPL");
3286
3287 /*
3288  * set bt_coex_active to true, uCode will do kill/defer
3289  * every time the priority line is asserted (BT is sending signals on the
3290  * priority line in the PCIx).
3291  * set bt_coex_active to false, uCode will ignore the BT activity and
3292  * perform the normal operation
3293  *
3294  * User might experience transmit issue on some platform due to WiFi/BT
3295  * co-exist problem. The possible behaviors are:
3296  *   Able to scan and finding all the available AP
3297  *   Not able to associate with any AP
3298  * On those platforms, WiFi communication can be restored by set
3299  * "bt_coex_active" module parameter to "false"
3300  *
3301  * default: bt_coex_active = true (BT_COEX_ENABLE)
3302  */
3303 static bool bt_coex_active = true;
3304 module_param(bt_coex_active, bool, S_IRUGO);
3305 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3306
3307 u32 il_debug_level;
3308 EXPORT_SYMBOL(il_debug_level);
3309
3310 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3311 EXPORT_SYMBOL(il_bcast_addr);
3312
3313 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3314 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3315 static void
3316 il_init_ht_hw_capab(const struct il_priv *il,
3317                     struct ieee80211_sta_ht_cap *ht_info,
3318                     enum ieee80211_band band)
3319 {
3320         u16 max_bit_rate = 0;
3321         u8 rx_chains_num = il->hw_params.rx_chains_num;
3322         u8 tx_chains_num = il->hw_params.tx_chains_num;
3323
3324         ht_info->cap = 0;
3325         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3326
3327         ht_info->ht_supported = true;
3328
3329         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3330         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3331         if (il->hw_params.ht40_channel & BIT(band)) {
3332                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3333                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3334                 ht_info->mcs.rx_mask[4] = 0x01;
3335                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3336         }
3337
3338         if (il->cfg->mod_params->amsdu_size_8K)
3339                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3340
3341         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3342         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3343
3344         ht_info->mcs.rx_mask[0] = 0xFF;
3345         if (rx_chains_num >= 2)
3346                 ht_info->mcs.rx_mask[1] = 0xFF;
3347         if (rx_chains_num >= 3)
3348                 ht_info->mcs.rx_mask[2] = 0xFF;
3349
3350         /* Highest supported Rx data rate */
3351         max_bit_rate *= rx_chains_num;
3352         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3353         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3354
3355         /* Tx MCS capabilities */
3356         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3357         if (tx_chains_num != rx_chains_num) {
3358                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3359                 ht_info->mcs.tx_params |=
3360                     ((tx_chains_num -
3361                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3362         }
3363 }
3364
3365 /**
3366  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3367  */
3368 int
3369 il_init_geos(struct il_priv *il)
3370 {
3371         struct il_channel_info *ch;
3372         struct ieee80211_supported_band *sband;
3373         struct ieee80211_channel *channels;
3374         struct ieee80211_channel *geo_ch;
3375         struct ieee80211_rate *rates;
3376         int i = 0;
3377         s8 max_tx_power = 0;
3378
3379         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3380             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3381                 D_INFO("Geography modes already initialized.\n");
3382                 set_bit(S_GEO_CONFIGURED, &il->status);
3383                 return 0;
3384         }
3385
3386         channels =
3387             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3388                     GFP_KERNEL);
3389         if (!channels)
3390                 return -ENOMEM;
3391
3392         rates =
3393             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3394                     GFP_KERNEL);
3395         if (!rates) {
3396                 kfree(channels);
3397                 return -ENOMEM;
3398         }
3399
3400         /* 5.2GHz channels start after the 2.4GHz channels */
3401         sband = &il->bands[IEEE80211_BAND_5GHZ];
3402         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3403         /* just OFDM */
3404         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3405         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3406
3407         if (il->cfg->sku & IL_SKU_N)
3408                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ);
3409
3410         sband = &il->bands[IEEE80211_BAND_2GHZ];
3411         sband->channels = channels;
3412         /* OFDM & CCK */
3413         sband->bitrates = rates;
3414         sband->n_bitrates = RATE_COUNT_LEGACY;
3415
3416         if (il->cfg->sku & IL_SKU_N)
3417                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ);
3418
3419         il->ieee_channels = channels;
3420         il->ieee_rates = rates;
3421
3422         for (i = 0; i < il->channel_count; i++) {
3423                 ch = &il->channel_info[i];
3424
3425                 if (!il_is_channel_valid(ch))
3426                         continue;
3427
3428                 sband = &il->bands[ch->band];
3429
3430                 geo_ch = &sband->channels[sband->n_channels++];
3431
3432                 geo_ch->center_freq =
3433                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3434                 geo_ch->max_power = ch->max_power_avg;
3435                 geo_ch->max_antenna_gain = 0xff;
3436                 geo_ch->hw_value = ch->channel;
3437
3438                 if (il_is_channel_valid(ch)) {
3439                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3440                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3441
3442                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3443                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3444
3445                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3446                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3447
3448                         geo_ch->flags |= ch->ht40_extension_channel;
3449
3450                         if (ch->max_power_avg > max_tx_power)
3451                                 max_tx_power = ch->max_power_avg;
3452                 } else {
3453                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3454                 }
3455
3456                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3457                        geo_ch->center_freq,
3458                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3459                        geo_ch->
3460                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3461                        geo_ch->flags);
3462         }
3463
3464         il->tx_power_device_lmt = max_tx_power;
3465         il->tx_power_user_lmt = max_tx_power;
3466         il->tx_power_next = max_tx_power;
3467
3468         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3469             (il->cfg->sku & IL_SKU_A)) {
3470                 IL_INFO("Incorrectly detected BG card as ABG. "
3471                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3472                         il->pci_dev->device, il->pci_dev->subsystem_device);
3473                 il->cfg->sku &= ~IL_SKU_A;
3474         }
3475
3476         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3477                 il->bands[IEEE80211_BAND_2GHZ].n_channels,
3478                 il->bands[IEEE80211_BAND_5GHZ].n_channels);
3479
3480         set_bit(S_GEO_CONFIGURED, &il->status);
3481
3482         return 0;
3483 }
3484 EXPORT_SYMBOL(il_init_geos);
3485
3486 /*
3487  * il_free_geos - undo allocations in il_init_geos
3488  */
3489 void
3490 il_free_geos(struct il_priv *il)
3491 {
3492         kfree(il->ieee_channels);
3493         kfree(il->ieee_rates);
3494         clear_bit(S_GEO_CONFIGURED, &il->status);
3495 }
3496 EXPORT_SYMBOL(il_free_geos);
3497
3498 static bool
3499 il_is_channel_extension(struct il_priv *il, enum ieee80211_band band,
3500                         u16 channel, u8 extension_chan_offset)
3501 {
3502         const struct il_channel_info *ch_info;
3503
3504         ch_info = il_get_channel_info(il, band, channel);
3505         if (!il_is_channel_valid(ch_info))
3506                 return false;
3507
3508         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3509                 return !(ch_info->
3510                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3511         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3512                 return !(ch_info->
3513                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3514
3515         return false;
3516 }
3517
3518 bool
3519 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3520 {
3521         if (!il->ht.enabled || !il->ht.is_40mhz)
3522                 return false;
3523
3524         /*
3525          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3526          * the bit will not set if it is pure 40MHz case
3527          */
3528         if (ht_cap && !ht_cap->ht_supported)
3529                 return false;
3530
3531 #ifdef CONFIG_IWLEGACY_DEBUGFS
3532         if (il->disable_ht40)
3533                 return false;
3534 #endif
3535
3536         return il_is_channel_extension(il, il->band,
3537                                        le16_to_cpu(il->staging.channel),
3538                                        il->ht.extension_chan_offset);
3539 }
3540 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3541
3542 static u16
3543 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3544 {
3545         u16 new_val;
3546         u16 beacon_factor;
3547
3548         /*
3549          * If mac80211 hasn't given us a beacon interval, program
3550          * the default into the device.
3551          */
3552         if (!beacon_val)
3553                 return DEFAULT_BEACON_INTERVAL;
3554
3555         /*
3556          * If the beacon interval we obtained from the peer
3557          * is too large, we'll have to wake up more often
3558          * (and in IBSS case, we'll beacon too much)
3559          *
3560          * For example, if max_beacon_val is 4096, and the
3561          * requested beacon interval is 7000, we'll have to
3562          * use 3500 to be able to wake up on the beacons.
3563          *
3564          * This could badly influence beacon detection stats.
3565          */
3566
3567         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3568         new_val = beacon_val / beacon_factor;
3569
3570         if (!new_val)
3571                 new_val = max_beacon_val;
3572
3573         return new_val;
3574 }
3575
3576 int
3577 il_send_rxon_timing(struct il_priv *il)
3578 {
3579         u64 tsf;
3580         s32 interval_tm, rem;
3581         struct ieee80211_conf *conf = NULL;
3582         u16 beacon_int;
3583         struct ieee80211_vif *vif = il->vif;
3584
3585         conf = &il->hw->conf;
3586
3587         lockdep_assert_held(&il->mutex);
3588
3589         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3590
3591         il->timing.timestamp = cpu_to_le64(il->timestamp);
3592         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3593
3594         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3595
3596         /*
3597          * TODO: For IBSS we need to get atim_win from mac80211,
3598          *       for now just always use 0
3599          */
3600         il->timing.atim_win = 0;
3601
3602         beacon_int =
3603             il_adjust_beacon_interval(beacon_int,
3604                                       il->hw_params.max_beacon_itrvl *
3605                                       TIME_UNIT);
3606         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3607
3608         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3609         interval_tm = beacon_int * TIME_UNIT;
3610         rem = do_div(tsf, interval_tm);
3611         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3612
3613         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3614
3615         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3616                 le16_to_cpu(il->timing.beacon_interval),
3617                 le32_to_cpu(il->timing.beacon_init_val),
3618                 le16_to_cpu(il->timing.atim_win));
3619
3620         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3621                                &il->timing);
3622 }
3623 EXPORT_SYMBOL(il_send_rxon_timing);
3624
3625 void
3626 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3627 {
3628         struct il_rxon_cmd *rxon = &il->staging;
3629
3630         if (hw_decrypt)
3631                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3632         else
3633                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3634
3635 }
3636 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3637
3638 /* validate RXON structure is valid */
3639 int
3640 il_check_rxon_cmd(struct il_priv *il)
3641 {
3642         struct il_rxon_cmd *rxon = &il->staging;
3643         bool error = false;
3644
3645         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3646                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3647                         IL_WARN("check 2.4G: wrong narrow\n");
3648                         error = true;
3649                 }
3650                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3651                         IL_WARN("check 2.4G: wrong radar\n");
3652                         error = true;
3653                 }
3654         } else {
3655                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3656                         IL_WARN("check 5.2G: not short slot!\n");
3657                         error = true;
3658                 }
3659                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3660                         IL_WARN("check 5.2G: CCK!\n");
3661                         error = true;
3662                 }
3663         }
3664         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3665                 IL_WARN("mac/bssid mcast!\n");
3666                 error = true;
3667         }
3668
3669         /* make sure basic rates 6Mbps and 1Mbps are supported */
3670         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3671             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3672                 IL_WARN("neither 1 nor 6 are basic\n");
3673                 error = true;
3674         }
3675
3676         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3677                 IL_WARN("aid > 2007\n");
3678                 error = true;
3679         }
3680
3681         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3682             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3683                 IL_WARN("CCK and short slot\n");
3684                 error = true;
3685         }
3686
3687         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3688             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3689                 IL_WARN("CCK and auto detect");
3690                 error = true;
3691         }
3692
3693         if ((rxon->
3694              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3695             RXON_FLG_TGG_PROTECT_MSK) {
3696                 IL_WARN("TGg but no auto-detect\n");
3697                 error = true;
3698         }
3699
3700         if (error)
3701                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3702
3703         if (error) {
3704                 IL_ERR("Invalid RXON\n");
3705                 return -EINVAL;
3706         }
3707         return 0;
3708 }
3709 EXPORT_SYMBOL(il_check_rxon_cmd);
3710
3711 /**
3712  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3713  * @il: staging_rxon is compared to active_rxon
3714  *
3715  * If the RXON structure is changing enough to require a new tune,
3716  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3717  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3718  */
3719 int
3720 il_full_rxon_required(struct il_priv *il)
3721 {
3722         const struct il_rxon_cmd *staging = &il->staging;
3723         const struct il_rxon_cmd *active = &il->active;
3724
3725 #define CHK(cond)                                                       \
3726         if ((cond)) {                                                   \
3727                 D_INFO("need full RXON - " #cond "\n"); \
3728                 return 1;                                               \
3729         }
3730
3731 #define CHK_NEQ(c1, c2)                                         \
3732         if ((c1) != (c2)) {                                     \
3733                 D_INFO("need full RXON - "      \
3734                                #c1 " != " #c2 " - %d != %d\n",  \
3735                                (c1), (c2));                     \
3736                 return 1;                                       \
3737         }
3738
3739         /* These items are only settable from the full RXON command */
3740         CHK(!il_is_associated(il));
3741         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
3742         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
3743         CHK(compare_ether_addr
3744             (staging->wlap_bssid_addr, active->wlap_bssid_addr));
3745         CHK_NEQ(staging->dev_type, active->dev_type);
3746         CHK_NEQ(staging->channel, active->channel);
3747         CHK_NEQ(staging->air_propagation, active->air_propagation);
3748         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3749                 active->ofdm_ht_single_stream_basic_rates);
3750         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3751                 active->ofdm_ht_dual_stream_basic_rates);
3752         CHK_NEQ(staging->assoc_id, active->assoc_id);
3753
3754         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3755          * be updated with the RXON_ASSOC command -- however only some
3756          * flag transitions are allowed using RXON_ASSOC */
3757
3758         /* Check if we are not switching bands */
3759         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3760                 active->flags & RXON_FLG_BAND_24G_MSK);
3761
3762         /* Check if we are switching association toggle */
3763         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3764                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3765
3766 #undef CHK
3767 #undef CHK_NEQ
3768
3769         return 0;
3770 }
3771 EXPORT_SYMBOL(il_full_rxon_required);
3772
3773 u8
3774 il_get_lowest_plcp(struct il_priv *il)
3775 {
3776         /*
3777          * Assign the lowest rate -- should really get this from
3778          * the beacon skb from mac80211.
3779          */
3780         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3781                 return RATE_1M_PLCP;
3782         else
3783                 return RATE_6M_PLCP;
3784 }
3785 EXPORT_SYMBOL(il_get_lowest_plcp);
3786
3787 static void
3788 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3789 {
3790         struct il_rxon_cmd *rxon = &il->staging;
3791
3792         if (!il->ht.enabled) {
3793                 rxon->flags &=
3794                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3795                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3796                       | RXON_FLG_HT_PROT_MSK);
3797                 return;
3798         }
3799
3800         rxon->flags |=
3801             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3802
3803         /* Set up channel bandwidth:
3804          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3805         /* clear the HT channel mode before set the mode */
3806         rxon->flags &=
3807             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3808         if (il_is_ht40_tx_allowed(il, NULL)) {
3809                 /* pure ht40 */
3810                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3811                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3812                         /* Note: control channel is opposite of extension channel */
3813                         switch (il->ht.extension_chan_offset) {
3814                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3815                                 rxon->flags &=
3816                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3817                                 break;
3818                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3819                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3820                                 break;
3821                         }
3822                 } else {
3823                         /* Note: control channel is opposite of extension channel */
3824                         switch (il->ht.extension_chan_offset) {
3825                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3826                                 rxon->flags &=
3827                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3828                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3829                                 break;
3830                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3831                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3832                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3833                                 break;
3834                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3835                         default:
3836                                 /* channel location only valid if in Mixed mode */
3837                                 IL_ERR("invalid extension channel offset\n");
3838                                 break;
3839                         }
3840                 }
3841         } else {
3842                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3843         }
3844
3845         if (il->ops->hcmd->set_rxon_chain)
3846                 il->ops->hcmd->set_rxon_chain(il);
3847
3848         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3849                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3850                 il->ht.protection, il->ht.extension_chan_offset);
3851 }
3852
3853 void
3854 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3855 {
3856         _il_set_rxon_ht(il, ht_conf);
3857 }
3858 EXPORT_SYMBOL(il_set_rxon_ht);
3859
3860 /* Return valid, unused, channel for a passive scan to reset the RF */
3861 u8
3862 il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band)
3863 {
3864         const struct il_channel_info *ch_info;
3865         int i;
3866         u8 channel = 0;
3867         u8 min, max;
3868
3869         if (band == IEEE80211_BAND_5GHZ) {
3870                 min = 14;
3871                 max = il->channel_count;
3872         } else {
3873                 min = 0;
3874                 max = 14;
3875         }
3876
3877         for (i = min; i < max; i++) {
3878                 channel = il->channel_info[i].channel;
3879                 if (channel == le16_to_cpu(il->staging.channel))
3880                         continue;
3881
3882                 ch_info = il_get_channel_info(il, band, channel);
3883                 if (il_is_channel_valid(ch_info))
3884                         break;
3885         }
3886
3887         return channel;
3888 }
3889 EXPORT_SYMBOL(il_get_single_channel_number);
3890
3891 /**
3892  * il_set_rxon_channel - Set the band and channel values in staging RXON
3893  * @ch: requested channel as a pointer to struct ieee80211_channel
3894
3895  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3896  * in the staging RXON flag structure based on the ch->band
3897  */
3898 int
3899 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3900 {
3901         enum ieee80211_band band = ch->band;
3902         u16 channel = ch->hw_value;
3903
3904         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3905                 return 0;
3906
3907         il->staging.channel = cpu_to_le16(channel);
3908         if (band == IEEE80211_BAND_5GHZ)
3909                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3910         else
3911                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3912
3913         il->band = band;
3914
3915         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3916
3917         return 0;
3918 }
3919 EXPORT_SYMBOL(il_set_rxon_channel);
3920
3921 void
3922 il_set_flags_for_band(struct il_priv *il, enum ieee80211_band band,
3923                       struct ieee80211_vif *vif)
3924 {
3925         if (band == IEEE80211_BAND_5GHZ) {
3926                 il->staging.flags &=
3927                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3928                       RXON_FLG_CCK_MSK);
3929                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3930         } else {
3931                 /* Copied from il_post_associate() */
3932                 if (vif && vif->bss_conf.use_short_slot)
3933                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3934                 else
3935                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3936
3937                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3938                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3939                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3940         }
3941 }
3942 EXPORT_SYMBOL(il_set_flags_for_band);
3943
3944 /*
3945  * initialize rxon structure with default values from eeprom
3946  */
3947 void
3948 il_connection_init_rx_config(struct il_priv *il)
3949 {
3950         const struct il_channel_info *ch_info;
3951
3952         memset(&il->staging, 0, sizeof(il->staging));
3953
3954         if (!il->vif) {
3955                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
3956         } else if (il->vif->type == NL80211_IFTYPE_STATION) {
3957                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
3958                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3959         } else if (il->vif->type == NL80211_IFTYPE_ADHOC) {
3960                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
3961                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3962                 il->staging.filter_flags =
3963                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
3964         } else {
3965                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
3966                 return;
3967         }
3968
3969 #if 0
3970         /* TODO:  Figure out when short_preamble would be set and cache from
3971          * that */
3972         if (!hw_to_local(il->hw)->short_preamble)
3973                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3974         else
3975                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3976 #endif
3977
3978         ch_info =
3979             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
3980
3981         if (!ch_info)
3982                 ch_info = &il->channel_info[0];
3983
3984         il->staging.channel = cpu_to_le16(ch_info->channel);
3985         il->band = ch_info->band;
3986
3987         il_set_flags_for_band(il, il->band, il->vif);
3988
3989         il->staging.ofdm_basic_rates =
3990             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3991         il->staging.cck_basic_rates =
3992             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3993
3994         /* clear both MIX and PURE40 mode flag */
3995         il->staging.flags &=
3996             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
3997         if (il->vif)
3998                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
3999
4000         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4001         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4002 }
4003 EXPORT_SYMBOL(il_connection_init_rx_config);
4004
4005 void
4006 il_set_rate(struct il_priv *il)
4007 {
4008         const struct ieee80211_supported_band *hw = NULL;
4009         struct ieee80211_rate *rate;
4010         int i;
4011
4012         hw = il_get_hw_mode(il, il->band);
4013         if (!hw) {
4014                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4015                 return;
4016         }
4017
4018         il->active_rate = 0;
4019
4020         for (i = 0; i < hw->n_bitrates; i++) {
4021                 rate = &(hw->bitrates[i]);
4022                 if (rate->hw_value < RATE_COUNT_LEGACY)
4023                         il->active_rate |= (1 << rate->hw_value);
4024         }
4025
4026         D_RATE("Set active_rate = %0x\n", il->active_rate);
4027
4028         il->staging.cck_basic_rates =
4029             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4030
4031         il->staging.ofdm_basic_rates =
4032             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4033 }
4034 EXPORT_SYMBOL(il_set_rate);
4035
4036 void
4037 il_chswitch_done(struct il_priv *il, bool is_success)
4038 {
4039         if (test_bit(S_EXIT_PENDING, &il->status))
4040                 return;
4041
4042         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4043                 ieee80211_chswitch_done(il->vif, is_success);
4044 }
4045 EXPORT_SYMBOL(il_chswitch_done);
4046
4047 void
4048 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4049 {
4050         struct il_rx_pkt *pkt = rxb_addr(rxb);
4051         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4052         struct il_rxon_cmd *rxon = (void *)&il->active;
4053
4054         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4055                 return;
4056
4057         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4058                 rxon->channel = csa->channel;
4059                 il->staging.channel = csa->channel;
4060                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4061                 il_chswitch_done(il, true);
4062         } else {
4063                 IL_ERR("CSA notif (fail) : channel %d\n",
4064                        le16_to_cpu(csa->channel));
4065                 il_chswitch_done(il, false);
4066         }
4067 }
4068 EXPORT_SYMBOL(il_hdl_csa);
4069
4070 #ifdef CONFIG_IWLEGACY_DEBUG
4071 void
4072 il_print_rx_config_cmd(struct il_priv *il)
4073 {
4074         struct il_rxon_cmd *rxon = &il->staging;
4075
4076         D_RADIO("RX CONFIG:\n");
4077         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4078         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4079         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4080         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4081         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4082         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4083         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4084         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4085         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4086         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4087 }
4088 EXPORT_SYMBOL(il_print_rx_config_cmd);
4089 #endif
4090 /**
4091  * il_irq_handle_error - called for HW or SW error interrupt from card
4092  */
4093 void
4094 il_irq_handle_error(struct il_priv *il)
4095 {
4096         /* Set the FW error flag -- cleared on il_down */
4097         set_bit(S_FW_ERROR, &il->status);
4098
4099         /* Cancel currently queued command. */
4100         clear_bit(S_HCMD_ACTIVE, &il->status);
4101
4102         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4103
4104         il->ops->lib->dump_nic_error_log(il);
4105         if (il->ops->lib->dump_fh)
4106                 il->ops->lib->dump_fh(il, NULL, false);
4107 #ifdef CONFIG_IWLEGACY_DEBUG
4108         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4109                 il_print_rx_config_cmd(il);
4110 #endif
4111
4112         wake_up(&il->wait_command_queue);
4113
4114         /* Keep the restart process from trying to send host
4115          * commands by clearing the INIT status bit */
4116         clear_bit(S_READY, &il->status);
4117
4118         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4119                 IL_DBG(IL_DL_FW_ERRORS,
4120                        "Restarting adapter due to uCode error.\n");
4121
4122                 if (il->cfg->mod_params->restart_fw)
4123                         queue_work(il->workqueue, &il->restart);
4124         }
4125 }
4126 EXPORT_SYMBOL(il_irq_handle_error);
4127
4128 static int
4129 il_apm_stop_master(struct il_priv *il)
4130 {
4131         int ret = 0;
4132
4133         /* stop device's busmaster DMA activity */
4134         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4135
4136         ret =
4137             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4138                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4139         if (ret)
4140                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4141
4142         D_INFO("stop master\n");
4143
4144         return ret;
4145 }
4146
4147 void
4148 il_apm_stop(struct il_priv *il)
4149 {
4150         D_INFO("Stop card, put in low power state\n");
4151
4152         /* Stop device's DMA activity */
4153         il_apm_stop_master(il);
4154
4155         /* Reset the entire device */
4156         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4157
4158         udelay(10);
4159
4160         /*
4161          * Clear "initialization complete" bit to move adapter from
4162          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4163          */
4164         il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4165 }
4166 EXPORT_SYMBOL(il_apm_stop);
4167
4168 /*
4169  * Start up NIC's basic functionality after it has been reset
4170  * (e.g. after platform boot, or shutdown via il_apm_stop())
4171  * NOTE:  This does not load uCode nor start the embedded processor
4172  */
4173 int
4174 il_apm_init(struct il_priv *il)
4175 {
4176         int ret = 0;
4177         u16 lctl;
4178
4179         D_INFO("Init card's basic functions\n");
4180
4181         /*
4182          * Use "set_bit" below rather than "write", to preserve any hardware
4183          * bits already set by default after reset.
4184          */
4185
4186         /* Disable L0S exit timer (platform NMI Work/Around) */
4187         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4188                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4189
4190         /*
4191          * Disable L0s without affecting L1;
4192          *  don't wait for ICH L0s (ICH bug W/A)
4193          */
4194         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4195                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4196
4197         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4198         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4199
4200         /*
4201          * Enable HAP INTA (interrupt from management bus) to
4202          * wake device's PCI Express link L1a -> L0s
4203          * NOTE:  This is no-op for 3945 (non-existent bit)
4204          */
4205         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4206                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4207
4208         /*
4209          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4210          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4211          * If so (likely), disable L0S, so device moves directly L0->L1;
4212          *    costs negligible amount of power savings.
4213          * If not (unlikely), enable L0S, so there is at least some
4214          *    power savings, even without L1.
4215          */
4216         if (il->cfg->set_l0s) {
4217                 lctl = il_pcie_link_ctl(il);
4218                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4219                     PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4220                         /* L1-ASPM enabled; disable(!) L0S  */
4221                         il_set_bit(il, CSR_GIO_REG,
4222                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4223                         D_POWER("L1 Enabled; Disabling L0S\n");
4224                 } else {
4225                         /* L1-ASPM disabled; enable(!) L0S */
4226                         il_clear_bit(il, CSR_GIO_REG,
4227                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4228                         D_POWER("L1 Disabled; Enabling L0S\n");
4229                 }
4230         }
4231
4232         /* Configure analog phase-lock-loop before activating to D0A */
4233         if (il->cfg->pll_cfg_val)
4234                 il_set_bit(il, CSR_ANA_PLL_CFG,
4235                            il->cfg->pll_cfg_val);
4236
4237         /*
4238          * Set "initialization complete" bit to move adapter from
4239          * D0U* --> D0A* (powered-up active) state.
4240          */
4241         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4242
4243         /*
4244          * Wait for clock stabilization; once stabilized, access to
4245          * device-internal resources is supported, e.g. il_wr_prph()
4246          * and accesses to uCode SRAM.
4247          */
4248         ret =
4249             _il_poll_bit(il, CSR_GP_CNTRL,
4250                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4251                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4252         if (ret < 0) {
4253                 D_INFO("Failed to init the card\n");
4254                 goto out;
4255         }
4256
4257         /*
4258          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4259          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4260          *
4261          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4262          * do not disable clocks.  This preserves any hardware bits already
4263          * set by default in "CLK_CTRL_REG" after reset.
4264          */
4265         if (il->cfg->use_bsm)
4266                 il_wr_prph(il, APMG_CLK_EN_REG,
4267                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4268         else
4269                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4270         udelay(20);
4271
4272         /* Disable L1-Active */
4273         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4274                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4275
4276 out:
4277         return ret;
4278 }
4279 EXPORT_SYMBOL(il_apm_init);
4280
4281 int
4282 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4283 {
4284         int ret;
4285         s8 prev_tx_power;
4286         bool defer;
4287
4288         lockdep_assert_held(&il->mutex);
4289
4290         if (il->tx_power_user_lmt == tx_power && !force)
4291                 return 0;
4292
4293         if (!il->ops->lib->send_tx_power)
4294                 return -EOPNOTSUPP;
4295
4296         /* 0 dBm mean 1 milliwatt */
4297         if (tx_power < 0) {
4298                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4299                 return -EINVAL;
4300         }
4301
4302         if (tx_power > il->tx_power_device_lmt) {
4303                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4304                         tx_power, il->tx_power_device_lmt);
4305                 return -EINVAL;
4306         }
4307
4308         if (!il_is_ready_rf(il))
4309                 return -EIO;
4310
4311         /* scan complete and commit_rxon use tx_power_next value,
4312          * it always need to be updated for newest request */
4313         il->tx_power_next = tx_power;
4314
4315         /* do not set tx power when scanning or channel changing */
4316         defer = test_bit(S_SCANNING, &il->status) ||
4317             memcmp(&il->active, &il->staging, sizeof(il->staging));
4318         if (defer && !force) {
4319                 D_INFO("Deferring tx power set\n");
4320                 return 0;
4321         }
4322
4323         prev_tx_power = il->tx_power_user_lmt;
4324         il->tx_power_user_lmt = tx_power;
4325
4326         ret = il->ops->lib->send_tx_power(il);
4327
4328         /* if fail to set tx_power, restore the orig. tx power */
4329         if (ret) {
4330                 il->tx_power_user_lmt = prev_tx_power;
4331                 il->tx_power_next = prev_tx_power;
4332         }
4333         return ret;
4334 }
4335 EXPORT_SYMBOL(il_set_tx_power);
4336
4337 void
4338 il_send_bt_config(struct il_priv *il)
4339 {
4340         struct il_bt_cmd bt_cmd = {
4341                 .lead_time = BT_LEAD_TIME_DEF,
4342                 .max_kill = BT_MAX_KILL_DEF,
4343                 .kill_ack_mask = 0,
4344                 .kill_cts_mask = 0,
4345         };
4346
4347         if (!bt_coex_active)
4348                 bt_cmd.flags = BT_COEX_DISABLE;
4349         else
4350                 bt_cmd.flags = BT_COEX_ENABLE;
4351
4352         D_INFO("BT coex %s\n",
4353                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4354
4355         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4356                 IL_ERR("failed to send BT Coex Config\n");
4357 }
4358 EXPORT_SYMBOL(il_send_bt_config);
4359
4360 int
4361 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4362 {
4363         struct il_stats_cmd stats_cmd = {
4364                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4365         };
4366
4367         if (flags & CMD_ASYNC)
4368                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4369                                              &stats_cmd, NULL);
4370         else
4371                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4372                                        &stats_cmd);
4373 }
4374 EXPORT_SYMBOL(il_send_stats_request);
4375
4376 void
4377 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4378 {
4379 #ifdef CONFIG_IWLEGACY_DEBUG
4380         struct il_rx_pkt *pkt = rxb_addr(rxb);
4381         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4382         D_RX("sleep mode: %d, src: %d\n",
4383              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4384 #endif
4385 }
4386 EXPORT_SYMBOL(il_hdl_pm_sleep);
4387
4388 void
4389 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4390 {
4391         struct il_rx_pkt *pkt = rxb_addr(rxb);
4392         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4393         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4394                 il_get_cmd_string(pkt->hdr.cmd));
4395         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4396 }
4397 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4398
4399 void
4400 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4401 {
4402         struct il_rx_pkt *pkt = rxb_addr(rxb);
4403
4404         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4405                "seq 0x%04X ser 0x%08X\n",
4406                le32_to_cpu(pkt->u.err_resp.error_type),
4407                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4408                pkt->u.err_resp.cmd_id,
4409                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4410                le32_to_cpu(pkt->u.err_resp.error_info));
4411 }
4412 EXPORT_SYMBOL(il_hdl_error);
4413
4414 void
4415 il_clear_isr_stats(struct il_priv *il)
4416 {
4417         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4418 }
4419
4420 int
4421 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4422                const struct ieee80211_tx_queue_params *params)
4423 {
4424         struct il_priv *il = hw->priv;
4425         unsigned long flags;
4426         int q;
4427
4428         D_MAC80211("enter\n");
4429
4430         if (!il_is_ready_rf(il)) {
4431                 D_MAC80211("leave - RF not ready\n");
4432                 return -EIO;
4433         }
4434
4435         if (queue >= AC_NUM) {
4436                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4437                 return 0;
4438         }
4439
4440         q = AC_NUM - 1 - queue;
4441
4442         spin_lock_irqsave(&il->lock, flags);
4443
4444         il->qos_data.def_qos_parm.ac[q].cw_min =
4445             cpu_to_le16(params->cw_min);
4446         il->qos_data.def_qos_parm.ac[q].cw_max =
4447             cpu_to_le16(params->cw_max);
4448         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4449         il->qos_data.def_qos_parm.ac[q].edca_txop =
4450             cpu_to_le16((params->txop * 32));
4451
4452         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4453
4454         spin_unlock_irqrestore(&il->lock, flags);
4455
4456         D_MAC80211("leave\n");
4457         return 0;
4458 }
4459 EXPORT_SYMBOL(il_mac_conf_tx);
4460
4461 int
4462 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4463 {
4464         struct il_priv *il = hw->priv;
4465
4466         return il->ibss_manager == IL_IBSS_MANAGER;
4467 }
4468 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4469
4470 static int
4471 il_set_mode(struct il_priv *il)
4472 {
4473         il_connection_init_rx_config(il);
4474
4475         if (il->ops->hcmd->set_rxon_chain)
4476                 il->ops->hcmd->set_rxon_chain(il);
4477
4478         return il_commit_rxon(il);
4479 }
4480
4481 int
4482 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4483 {
4484         struct il_priv *il = hw->priv;
4485         int err;
4486
4487         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4488
4489         mutex_lock(&il->mutex);
4490
4491         if (!il_is_ready_rf(il)) {
4492                 IL_WARN("Try to add interface when device not ready\n");
4493                 err = -EINVAL;
4494                 goto out;
4495         }
4496
4497         if (il->vif) {
4498                 err = -EOPNOTSUPP;
4499                 goto out;
4500         }
4501
4502         il->vif = vif;
4503         il->iw_mode = vif->type;
4504
4505         err = il_set_mode(il);
4506         if (err) {
4507                 il->vif = NULL;
4508                 il->iw_mode = NL80211_IFTYPE_STATION;
4509         }
4510
4511 out:
4512         mutex_unlock(&il->mutex);
4513
4514         D_MAC80211("leave\n");
4515         return err;
4516 }
4517 EXPORT_SYMBOL(il_mac_add_interface);
4518
4519 static void
4520 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif,
4521                       bool mode_change)
4522 {
4523         lockdep_assert_held(&il->mutex);
4524
4525         if (il->scan_vif == vif) {
4526                 il_scan_cancel_timeout(il, 200);
4527                 il_force_scan_end(il);
4528         }
4529
4530         if (!mode_change)
4531                 il_set_mode(il);
4532
4533 }
4534
4535 void
4536 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4537 {
4538         struct il_priv *il = hw->priv;
4539
4540         D_MAC80211("enter\n");
4541
4542         mutex_lock(&il->mutex);
4543
4544         WARN_ON(il->vif != vif);
4545         il->vif = NULL;
4546
4547         il_teardown_interface(il, vif, false);
4548
4549         memset(il->bssid, 0, ETH_ALEN);
4550         mutex_unlock(&il->mutex);
4551
4552         D_MAC80211("leave\n");
4553
4554 }
4555 EXPORT_SYMBOL(il_mac_remove_interface);
4556
4557 int
4558 il_alloc_txq_mem(struct il_priv *il)
4559 {
4560         if (!il->txq)
4561                 il->txq =
4562                     kzalloc(sizeof(struct il_tx_queue) *
4563                             il->cfg->num_of_queues, GFP_KERNEL);
4564         if (!il->txq) {
4565                 IL_ERR("Not enough memory for txq\n");
4566                 return -ENOMEM;
4567         }
4568         return 0;
4569 }
4570 EXPORT_SYMBOL(il_alloc_txq_mem);
4571
4572 void
4573 il_txq_mem(struct il_priv *il)
4574 {
4575         kfree(il->txq);
4576         il->txq = NULL;
4577 }
4578 EXPORT_SYMBOL(il_txq_mem);
4579
4580 #ifdef CONFIG_IWLEGACY_DEBUGFS
4581
4582 #define IL_TRAFFIC_DUMP_SIZE    (IL_TRAFFIC_ENTRY_SIZE * IL_TRAFFIC_ENTRIES)
4583
4584 void
4585 il_reset_traffic_log(struct il_priv *il)
4586 {
4587         il->tx_traffic_idx = 0;
4588         il->rx_traffic_idx = 0;
4589         if (il->tx_traffic)
4590                 memset(il->tx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4591         if (il->rx_traffic)
4592                 memset(il->rx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4593 }
4594
4595 int
4596 il_alloc_traffic_mem(struct il_priv *il)
4597 {
4598         u32 traffic_size = IL_TRAFFIC_DUMP_SIZE;
4599
4600         if (il_debug_level & IL_DL_TX) {
4601                 if (!il->tx_traffic) {
4602                         il->tx_traffic = kzalloc(traffic_size, GFP_KERNEL);
4603                         if (!il->tx_traffic)
4604                                 return -ENOMEM;
4605                 }
4606         }
4607         if (il_debug_level & IL_DL_RX) {
4608                 if (!il->rx_traffic) {
4609                         il->rx_traffic = kzalloc(traffic_size, GFP_KERNEL);
4610                         if (!il->rx_traffic)
4611                                 return -ENOMEM;
4612                 }
4613         }
4614         il_reset_traffic_log(il);
4615         return 0;
4616 }
4617 EXPORT_SYMBOL(il_alloc_traffic_mem);
4618
4619 void
4620 il_free_traffic_mem(struct il_priv *il)
4621 {
4622         kfree(il->tx_traffic);
4623         il->tx_traffic = NULL;
4624
4625         kfree(il->rx_traffic);
4626         il->rx_traffic = NULL;
4627 }
4628 EXPORT_SYMBOL(il_free_traffic_mem);
4629
4630 void
4631 il_dbg_log_tx_data_frame(struct il_priv *il, u16 length,
4632                          struct ieee80211_hdr *header)
4633 {
4634         __le16 fc;
4635         u16 len;
4636
4637         if (likely(!(il_debug_level & IL_DL_TX)))
4638                 return;
4639
4640         if (!il->tx_traffic)
4641                 return;
4642
4643         fc = header->frame_control;
4644         if (ieee80211_is_data(fc)) {
4645                 len =
4646                     (length >
4647                      IL_TRAFFIC_ENTRY_SIZE) ? IL_TRAFFIC_ENTRY_SIZE : length;
4648                 memcpy((il->tx_traffic +
4649                         (il->tx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)), header,
4650                        len);
4651                 il->tx_traffic_idx =
4652                     (il->tx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4653         }
4654 }
4655 EXPORT_SYMBOL(il_dbg_log_tx_data_frame);
4656
4657 void
4658 il_dbg_log_rx_data_frame(struct il_priv *il, u16 length,
4659                          struct ieee80211_hdr *header)
4660 {
4661         __le16 fc;
4662         u16 len;
4663
4664         if (likely(!(il_debug_level & IL_DL_RX)))
4665                 return;
4666
4667         if (!il->rx_traffic)
4668                 return;
4669
4670         fc = header->frame_control;
4671         if (ieee80211_is_data(fc)) {
4672                 len =
4673                     (length >
4674                      IL_TRAFFIC_ENTRY_SIZE) ? IL_TRAFFIC_ENTRY_SIZE : length;
4675                 memcpy((il->rx_traffic +
4676                         (il->rx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)), header,
4677                        len);
4678                 il->rx_traffic_idx =
4679                     (il->rx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4680         }
4681 }
4682 EXPORT_SYMBOL(il_dbg_log_rx_data_frame);
4683
4684 const char *
4685 il_get_mgmt_string(int cmd)
4686 {
4687         switch (cmd) {
4688                 IL_CMD(MANAGEMENT_ASSOC_REQ);
4689                 IL_CMD(MANAGEMENT_ASSOC_RESP);
4690                 IL_CMD(MANAGEMENT_REASSOC_REQ);
4691                 IL_CMD(MANAGEMENT_REASSOC_RESP);
4692                 IL_CMD(MANAGEMENT_PROBE_REQ);
4693                 IL_CMD(MANAGEMENT_PROBE_RESP);
4694                 IL_CMD(MANAGEMENT_BEACON);
4695                 IL_CMD(MANAGEMENT_ATIM);
4696                 IL_CMD(MANAGEMENT_DISASSOC);
4697                 IL_CMD(MANAGEMENT_AUTH);
4698                 IL_CMD(MANAGEMENT_DEAUTH);
4699                 IL_CMD(MANAGEMENT_ACTION);
4700         default:
4701                 return "UNKNOWN";
4702
4703         }
4704 }
4705
4706 const char *
4707 il_get_ctrl_string(int cmd)
4708 {
4709         switch (cmd) {
4710                 IL_CMD(CONTROL_BACK_REQ);
4711                 IL_CMD(CONTROL_BACK);
4712                 IL_CMD(CONTROL_PSPOLL);
4713                 IL_CMD(CONTROL_RTS);
4714                 IL_CMD(CONTROL_CTS);
4715                 IL_CMD(CONTROL_ACK);
4716                 IL_CMD(CONTROL_CFEND);
4717                 IL_CMD(CONTROL_CFENDACK);
4718         default:
4719                 return "UNKNOWN";
4720
4721         }
4722 }
4723
4724 void
4725 il_clear_traffic_stats(struct il_priv *il)
4726 {
4727         memset(&il->tx_stats, 0, sizeof(struct traffic_stats));
4728         memset(&il->rx_stats, 0, sizeof(struct traffic_stats));
4729 }
4730
4731 /*
4732  * if CONFIG_IWLEGACY_DEBUGFS defined,
4733  * il_update_stats function will
4734  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
4735  * Use debugFs to display the rx/rx_stats
4736  * if CONFIG_IWLEGACY_DEBUGFS not being defined, then no MGMT and CTRL
4737  * information will be recorded, but DATA pkt still will be recorded
4738  * for the reason of il_led.c need to control the led blinking based on
4739  * number of tx and rx data.
4740  *
4741  */
4742 void
4743 il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
4744 {
4745         struct traffic_stats *stats;
4746
4747         if (is_tx)
4748                 stats = &il->tx_stats;
4749         else
4750                 stats = &il->rx_stats;
4751
4752         if (ieee80211_is_mgmt(fc)) {
4753                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4754                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
4755                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
4756                         break;
4757                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
4758                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
4759                         break;
4760                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
4761                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
4762                         break;
4763                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
4764                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
4765                         break;
4766                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
4767                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
4768                         break;
4769                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
4770                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
4771                         break;
4772                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
4773                         stats->mgmt[MANAGEMENT_BEACON]++;
4774                         break;
4775                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
4776                         stats->mgmt[MANAGEMENT_ATIM]++;
4777                         break;
4778                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
4779                         stats->mgmt[MANAGEMENT_DISASSOC]++;
4780                         break;
4781                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
4782                         stats->mgmt[MANAGEMENT_AUTH]++;
4783                         break;
4784                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
4785                         stats->mgmt[MANAGEMENT_DEAUTH]++;
4786                         break;
4787                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
4788                         stats->mgmt[MANAGEMENT_ACTION]++;
4789                         break;
4790                 }
4791         } else if (ieee80211_is_ctl(fc)) {
4792                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4793                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
4794                         stats->ctrl[CONTROL_BACK_REQ]++;
4795                         break;
4796                 case cpu_to_le16(IEEE80211_STYPE_BACK):
4797                         stats->ctrl[CONTROL_BACK]++;
4798                         break;
4799                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
4800                         stats->ctrl[CONTROL_PSPOLL]++;
4801                         break;
4802                 case cpu_to_le16(IEEE80211_STYPE_RTS):
4803                         stats->ctrl[CONTROL_RTS]++;
4804                         break;
4805                 case cpu_to_le16(IEEE80211_STYPE_CTS):
4806                         stats->ctrl[CONTROL_CTS]++;
4807                         break;
4808                 case cpu_to_le16(IEEE80211_STYPE_ACK):
4809                         stats->ctrl[CONTROL_ACK]++;
4810                         break;
4811                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
4812                         stats->ctrl[CONTROL_CFEND]++;
4813                         break;
4814                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
4815                         stats->ctrl[CONTROL_CFENDACK]++;
4816                         break;
4817                 }
4818         } else {
4819                 /* data */
4820                 stats->data_cnt++;
4821                 stats->data_bytes += len;
4822         }
4823 }
4824 EXPORT_SYMBOL(il_update_stats);
4825 #endif
4826
4827 int
4828 il_force_reset(struct il_priv *il, bool external)
4829 {
4830         struct il_force_reset *force_reset;
4831
4832         if (test_bit(S_EXIT_PENDING, &il->status))
4833                 return -EINVAL;
4834
4835         force_reset = &il->force_reset;
4836         force_reset->reset_request_count++;
4837         if (!external) {
4838                 if (force_reset->last_force_reset_jiffies &&
4839                     time_after(force_reset->last_force_reset_jiffies +
4840                                force_reset->reset_duration, jiffies)) {
4841                         D_INFO("force reset rejected\n");
4842                         force_reset->reset_reject_count++;
4843                         return -EAGAIN;
4844                 }
4845         }
4846         force_reset->reset_success_count++;
4847         force_reset->last_force_reset_jiffies = jiffies;
4848
4849         /*
4850          * if the request is from external(ex: debugfs),
4851          * then always perform the request in regardless the module
4852          * parameter setting
4853          * if the request is from internal (uCode error or driver
4854          * detect failure), then fw_restart module parameter
4855          * need to be check before performing firmware reload
4856          */
4857
4858         if (!external && !il->cfg->mod_params->restart_fw) {
4859                 D_INFO("Cancel firmware reload based on "
4860                        "module parameter setting\n");
4861                 return 0;
4862         }
4863
4864         IL_ERR("On demand firmware reload\n");
4865
4866         /* Set the FW error flag -- cleared on il_down */
4867         set_bit(S_FW_ERROR, &il->status);
4868         wake_up(&il->wait_command_queue);
4869         /*
4870          * Keep the restart process from trying to send host
4871          * commands by clearing the INIT status bit
4872          */
4873         clear_bit(S_READY, &il->status);
4874         queue_work(il->workqueue, &il->restart);
4875
4876         return 0;
4877 }
4878
4879 int
4880 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4881                         enum nl80211_iftype newtype, bool newp2p)
4882 {
4883         struct il_priv *il = hw->priv;
4884         int err;
4885
4886         if (newp2p)
4887                 return -EOPNOTSUPP;
4888
4889         mutex_lock(&il->mutex);
4890
4891         if (!il->vif || !il_is_ready_rf(il)) {
4892                 /*
4893                  * Huh? But wait ... this can maybe happen when
4894                  * we're in the middle of a firmware restart!
4895                  */
4896                 err = -EBUSY;
4897                 goto out;
4898         }
4899
4900         /* success */
4901         il_teardown_interface(il, vif, true);
4902         vif->type = newtype;
4903         vif->p2p = false;
4904         err = il_set_mode(il);
4905         WARN_ON(err);
4906         /*
4907          * We've switched internally, but submitting to the
4908          * device may have failed for some reason. Mask this
4909          * error, because otherwise mac80211 will not switch
4910          * (and set the interface type back) and we'll be
4911          * out of sync with it.
4912          */
4913         err = 0;
4914
4915 out:
4916         mutex_unlock(&il->mutex);
4917         return err;
4918 }
4919 EXPORT_SYMBOL(il_mac_change_interface);
4920
4921 /*
4922  * On every watchdog tick we check (latest) time stamp. If it does not
4923  * change during timeout period and queue is not empty we reset firmware.
4924  */
4925 static int
4926 il_check_stuck_queue(struct il_priv *il, int cnt)
4927 {
4928         struct il_tx_queue *txq = &il->txq[cnt];
4929         struct il_queue *q = &txq->q;
4930         unsigned long timeout;
4931         int ret;
4932
4933         if (q->read_ptr == q->write_ptr) {
4934                 txq->time_stamp = jiffies;
4935                 return 0;
4936         }
4937
4938         timeout =
4939             txq->time_stamp +
4940             msecs_to_jiffies(il->cfg->wd_timeout);
4941
4942         if (time_after(jiffies, timeout)) {
4943                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4944                        il->cfg->wd_timeout);
4945                 ret = il_force_reset(il, false);
4946                 return (ret == -EAGAIN) ? 0 : 1;
4947         }
4948
4949         return 0;
4950 }
4951
4952 /*
4953  * Making watchdog tick be a quarter of timeout assure we will
4954  * discover the queue hung between timeout and 1.25*timeout
4955  */
4956 #define IL_WD_TICK(timeout) ((timeout) / 4)
4957
4958 /*
4959  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4960  * we reset the firmware. If everything is fine just rearm the timer.
4961  */
4962 void
4963 il_bg_watchdog(unsigned long data)
4964 {
4965         struct il_priv *il = (struct il_priv *)data;
4966         int cnt;
4967         unsigned long timeout;
4968
4969         if (test_bit(S_EXIT_PENDING, &il->status))
4970                 return;
4971
4972         timeout = il->cfg->wd_timeout;
4973         if (timeout == 0)
4974                 return;
4975
4976         /* monitor and check for stuck cmd queue */
4977         if (il_check_stuck_queue(il, il->cmd_queue))
4978                 return;
4979
4980         /* monitor and check for other stuck queues */
4981         if (il_is_any_associated(il)) {
4982                 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4983                         /* skip as we already checked the command queue */
4984                         if (cnt == il->cmd_queue)
4985                                 continue;
4986                         if (il_check_stuck_queue(il, cnt))
4987                                 return;
4988                 }
4989         }
4990
4991         mod_timer(&il->watchdog,
4992                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4993 }
4994 EXPORT_SYMBOL(il_bg_watchdog);
4995
4996 void
4997 il_setup_watchdog(struct il_priv *il)
4998 {
4999         unsigned int timeout = il->cfg->wd_timeout;
5000
5001         if (timeout)
5002                 mod_timer(&il->watchdog,
5003                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
5004         else
5005                 del_timer(&il->watchdog);
5006 }
5007 EXPORT_SYMBOL(il_setup_watchdog);
5008
5009 /*
5010  * extended beacon time format
5011  * time in usec will be changed into a 32-bit value in extended:internal format
5012  * the extended part is the beacon counts
5013  * the internal part is the time in usec within one beacon interval
5014  */
5015 u32
5016 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
5017 {
5018         u32 quot;
5019         u32 rem;
5020         u32 interval = beacon_interval * TIME_UNIT;
5021
5022         if (!interval || !usec)
5023                 return 0;
5024
5025         quot =
5026             (usec /
5027              interval) & (il_beacon_time_mask_high(il,
5028                                                    il->hw_params.
5029                                                    beacon_time_tsf_bits) >> il->
5030                           hw_params.beacon_time_tsf_bits);
5031         rem =
5032             (usec % interval) & il_beacon_time_mask_low(il,
5033                                                         il->hw_params.
5034                                                         beacon_time_tsf_bits);
5035
5036         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
5037 }
5038 EXPORT_SYMBOL(il_usecs_to_beacons);
5039
5040 /* base is usually what we get from ucode with each received frame,
5041  * the same as HW timer counter counting down
5042  */
5043 __le32
5044 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
5045                    u32 beacon_interval)
5046 {
5047         u32 base_low = base & il_beacon_time_mask_low(il,
5048                                                       il->hw_params.
5049                                                       beacon_time_tsf_bits);
5050         u32 addon_low = addon & il_beacon_time_mask_low(il,
5051                                                         il->hw_params.
5052                                                         beacon_time_tsf_bits);
5053         u32 interval = beacon_interval * TIME_UNIT;
5054         u32 res = (base & il_beacon_time_mask_high(il,
5055                                                    il->hw_params.
5056                                                    beacon_time_tsf_bits)) +
5057             (addon & il_beacon_time_mask_high(il,
5058                                               il->hw_params.
5059                                               beacon_time_tsf_bits));
5060
5061         if (base_low > addon_low)
5062                 res += base_low - addon_low;
5063         else if (base_low < addon_low) {
5064                 res += interval + base_low - addon_low;
5065                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5066         } else
5067                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5068
5069         return cpu_to_le32(res);
5070 }
5071 EXPORT_SYMBOL(il_add_beacon_time);
5072
5073 #ifdef CONFIG_PM
5074
5075 int
5076 il_pci_suspend(struct device *device)
5077 {
5078         struct pci_dev *pdev = to_pci_dev(device);
5079         struct il_priv *il = pci_get_drvdata(pdev);
5080
5081         /*
5082          * This function is called when system goes into suspend state
5083          * mac80211 will call il_mac_stop() from the mac80211 suspend function
5084          * first but since il_mac_stop() has no knowledge of who the caller is,
5085          * it will not call apm_ops.stop() to stop the DMA operation.
5086          * Calling apm_ops.stop here to make sure we stop the DMA.
5087          */
5088         il_apm_stop(il);
5089
5090         return 0;
5091 }
5092 EXPORT_SYMBOL(il_pci_suspend);
5093
5094 int
5095 il_pci_resume(struct device *device)
5096 {
5097         struct pci_dev *pdev = to_pci_dev(device);
5098         struct il_priv *il = pci_get_drvdata(pdev);
5099         bool hw_rfkill = false;
5100
5101         /*
5102          * We disable the RETRY_TIMEOUT register (0x41) to keep
5103          * PCI Tx retries from interfering with C3 CPU state.
5104          */
5105         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
5106
5107         il_enable_interrupts(il);
5108
5109         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5110                 hw_rfkill = true;
5111
5112         if (hw_rfkill)
5113                 set_bit(S_RF_KILL_HW, &il->status);
5114         else
5115                 clear_bit(S_RF_KILL_HW, &il->status);
5116
5117         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
5118
5119         return 0;
5120 }
5121 EXPORT_SYMBOL(il_pci_resume);
5122
5123 const struct dev_pm_ops il_pm_ops = {
5124         .suspend = il_pci_suspend,
5125         .resume = il_pci_resume,
5126         .freeze = il_pci_suspend,
5127         .thaw = il_pci_resume,
5128         .poweroff = il_pci_suspend,
5129         .restore = il_pci_resume,
5130 };
5131 EXPORT_SYMBOL(il_pm_ops);
5132
5133 #endif /* CONFIG_PM */
5134
5135 static void
5136 il_update_qos(struct il_priv *il)
5137 {
5138         if (test_bit(S_EXIT_PENDING, &il->status))
5139                 return;
5140
5141         il->qos_data.def_qos_parm.qos_flags = 0;
5142
5143         if (il->qos_data.qos_active)
5144                 il->qos_data.def_qos_parm.qos_flags |=
5145                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5146
5147         if (il->ht.enabled)
5148                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5149
5150         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5151               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5152
5153         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5154                               &il->qos_data.def_qos_parm, NULL);
5155 }
5156
5157 /**
5158  * il_mac_config - mac80211 config callback
5159  */
5160 int
5161 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5162 {
5163         struct il_priv *il = hw->priv;
5164         const struct il_channel_info *ch_info;
5165         struct ieee80211_conf *conf = &hw->conf;
5166         struct ieee80211_channel *channel = conf->channel;
5167         struct il_ht_config *ht_conf = &il->current_ht_config;
5168         unsigned long flags = 0;
5169         int ret = 0;
5170         u16 ch;
5171         int scan_active = 0;
5172         bool ht_changed = false;
5173
5174         if (WARN_ON(!il->ops->legacy))
5175                 return -EOPNOTSUPP;
5176
5177         mutex_lock(&il->mutex);
5178
5179         D_MAC80211("enter to channel %d changed 0x%X\n", channel->hw_value,
5180                    changed);
5181
5182         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5183                 scan_active = 1;
5184                 D_MAC80211("scan active\n");
5185         }
5186
5187         if (changed &
5188             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5189                 /* mac80211 uses static for non-HT which is what we want */
5190                 il->current_ht_config.smps = conf->smps_mode;
5191
5192                 /*
5193                  * Recalculate chain counts.
5194                  *
5195                  * If monitor mode is enabled then mac80211 will
5196                  * set up the SM PS mode to OFF if an HT channel is
5197                  * configured.
5198                  */
5199                 if (il->ops->hcmd->set_rxon_chain)
5200                         il->ops->hcmd->set_rxon_chain(il);
5201         }
5202
5203         /* during scanning mac80211 will delay channel setting until
5204          * scan finish with changed = 0
5205          */
5206         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5207
5208                 if (scan_active)
5209                         goto set_ch_out;
5210
5211                 ch = channel->hw_value;
5212                 ch_info = il_get_channel_info(il, channel->band, ch);
5213                 if (!il_is_channel_valid(ch_info)) {
5214                         D_MAC80211("leave - invalid channel\n");
5215                         ret = -EINVAL;
5216                         goto set_ch_out;
5217                 }
5218
5219                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5220                     !il_is_channel_ibss(ch_info)) {
5221                         D_MAC80211("leave - not IBSS channel\n");
5222                         ret = -EINVAL;
5223                         goto set_ch_out;
5224                 }
5225
5226                 spin_lock_irqsave(&il->lock, flags);
5227
5228                 /* Configure HT40 channels */
5229                 if (il->ht.enabled != conf_is_ht(conf)) {
5230                         il->ht.enabled = conf_is_ht(conf);
5231                         ht_changed = true;
5232                 }
5233                 if (il->ht.enabled) {
5234                         if (conf_is_ht40_minus(conf)) {
5235                                 il->ht.extension_chan_offset =
5236                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5237                                 il->ht.is_40mhz = true;
5238                         } else if (conf_is_ht40_plus(conf)) {
5239                                 il->ht.extension_chan_offset =
5240                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5241                                 il->ht.is_40mhz = true;
5242                         } else {
5243                                 il->ht.extension_chan_offset =
5244                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5245                                 il->ht.is_40mhz = false;
5246                         }
5247                 } else
5248                         il->ht.is_40mhz = false;
5249
5250                 /*
5251                  * Default to no protection. Protection mode will
5252                  * later be set from BSS config in il_ht_conf
5253                  */
5254                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5255
5256                 /* if we are switching from ht to 2.4 clear flags
5257                  * from any ht related info since 2.4 does not
5258                  * support ht */
5259                 if ((le16_to_cpu(il->staging.channel) != ch))
5260                         il->staging.flags = 0;
5261
5262                 il_set_rxon_channel(il, channel);
5263                 il_set_rxon_ht(il, ht_conf);
5264
5265                 il_set_flags_for_band(il, channel->band, il->vif);
5266
5267                 spin_unlock_irqrestore(&il->lock, flags);
5268
5269                 if (il->ops->legacy->update_bcast_stations)
5270                         ret = il->ops->legacy->update_bcast_stations(il);
5271
5272 set_ch_out:
5273                 /* The list of supported rates and rate mask can be different
5274                  * for each band; since the band may have changed, reset
5275                  * the rate mask to what mac80211 lists */
5276                 il_set_rate(il);
5277         }
5278
5279         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5280                 ret = il_power_update_mode(il, false);
5281                 if (ret)
5282                         D_MAC80211("Error setting sleep level\n");
5283         }
5284
5285         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5286                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5287                            conf->power_level);
5288
5289                 il_set_tx_power(il, conf->power_level, false);
5290         }
5291
5292         if (!il_is_ready(il)) {
5293                 D_MAC80211("leave - not ready\n");
5294                 goto out;
5295         }
5296
5297         if (scan_active)
5298                 goto out;
5299
5300         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5301                 il_commit_rxon(il);
5302         else
5303                 D_INFO("Not re-sending same RXON configuration.\n");
5304         if (ht_changed)
5305                 il_update_qos(il);
5306
5307 out:
5308         D_MAC80211("leave\n");
5309         mutex_unlock(&il->mutex);
5310         return ret;
5311 }
5312 EXPORT_SYMBOL(il_mac_config);
5313
5314 void
5315 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5316 {
5317         struct il_priv *il = hw->priv;
5318         unsigned long flags;
5319
5320         if (WARN_ON(!il->ops->legacy))
5321                 return;
5322
5323         mutex_lock(&il->mutex);
5324         D_MAC80211("enter\n");
5325
5326         spin_lock_irqsave(&il->lock, flags);
5327         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5328         spin_unlock_irqrestore(&il->lock, flags);
5329
5330         spin_lock_irqsave(&il->lock, flags);
5331
5332         /* new association get rid of ibss beacon skb */
5333         if (il->beacon_skb)
5334                 dev_kfree_skb(il->beacon_skb);
5335
5336         il->beacon_skb = NULL;
5337
5338         il->timestamp = 0;
5339
5340         spin_unlock_irqrestore(&il->lock, flags);
5341
5342         il_scan_cancel_timeout(il, 100);
5343         if (!il_is_ready_rf(il)) {
5344                 D_MAC80211("leave - not ready\n");
5345                 mutex_unlock(&il->mutex);
5346                 return;
5347         }
5348
5349         /* we are restarting association process
5350          * clear RXON_FILTER_ASSOC_MSK bit
5351          */
5352         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5353         il_commit_rxon(il);
5354
5355         il_set_rate(il);
5356
5357         mutex_unlock(&il->mutex);
5358
5359         D_MAC80211("leave\n");
5360 }
5361 EXPORT_SYMBOL(il_mac_reset_tsf);
5362
5363 static void
5364 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5365 {
5366         struct il_ht_config *ht_conf = &il->current_ht_config;
5367         struct ieee80211_sta *sta;
5368         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5369
5370         D_ASSOC("enter:\n");
5371
5372         if (!il->ht.enabled)
5373                 return;
5374
5375         il->ht.protection =
5376             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5377         il->ht.non_gf_sta_present =
5378             !!(bss_conf->
5379                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5380
5381         ht_conf->single_chain_sufficient = false;
5382
5383         switch (vif->type) {
5384         case NL80211_IFTYPE_STATION:
5385                 rcu_read_lock();
5386                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5387                 if (sta) {
5388                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5389                         int maxstreams;
5390
5391                         maxstreams =
5392                             (ht_cap->mcs.
5393                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5394                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5395                         maxstreams += 1;
5396
5397                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5398                             ht_cap->mcs.rx_mask[2] == 0)
5399                                 ht_conf->single_chain_sufficient = true;
5400                         if (maxstreams <= 1)
5401                                 ht_conf->single_chain_sufficient = true;
5402                 } else {
5403                         /*
5404                          * If at all, this can only happen through a race
5405                          * when the AP disconnects us while we're still
5406                          * setting up the connection, in that case mac80211
5407                          * will soon tell us about that.
5408                          */
5409                         ht_conf->single_chain_sufficient = true;
5410                 }
5411                 rcu_read_unlock();
5412                 break;
5413         case NL80211_IFTYPE_ADHOC:
5414                 ht_conf->single_chain_sufficient = true;
5415                 break;
5416         default:
5417                 break;
5418         }
5419
5420         D_ASSOC("leave\n");
5421 }
5422
5423 static inline void
5424 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5425 {
5426         /*
5427          * inform the ucode that there is no longer an
5428          * association and that no more packets should be
5429          * sent
5430          */
5431         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5432         il->staging.assoc_id = 0;
5433         il_commit_rxon(il);
5434 }
5435
5436 static void
5437 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5438 {
5439         struct il_priv *il = hw->priv;
5440         unsigned long flags;
5441         __le64 timestamp;
5442         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5443
5444         if (!skb)
5445                 return;
5446
5447         D_MAC80211("enter\n");
5448
5449         lockdep_assert_held(&il->mutex);
5450
5451         if (!il->beacon_enabled) {
5452                 IL_ERR("update beacon with no beaconing enabled\n");
5453                 dev_kfree_skb(skb);
5454                 return;
5455         }
5456
5457         spin_lock_irqsave(&il->lock, flags);
5458
5459         if (il->beacon_skb)
5460                 dev_kfree_skb(il->beacon_skb);
5461
5462         il->beacon_skb = skb;
5463
5464         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5465         il->timestamp = le64_to_cpu(timestamp);
5466
5467         D_MAC80211("leave\n");
5468         spin_unlock_irqrestore(&il->lock, flags);
5469
5470         if (!il_is_ready_rf(il)) {
5471                 D_MAC80211("leave - RF not ready\n");
5472                 return;
5473         }
5474
5475         il->ops->legacy->post_associate(il);
5476 }
5477
5478 void
5479 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5480                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5481 {
5482         struct il_priv *il = hw->priv;
5483         int ret;
5484
5485         if (WARN_ON(!il->ops->legacy))
5486                 return;
5487
5488         D_MAC80211("changes = 0x%X\n", changes);
5489
5490         mutex_lock(&il->mutex);
5491
5492         if (!il_is_alive(il)) {
5493                 mutex_unlock(&il->mutex);
5494                 return;
5495         }
5496
5497         if (changes & BSS_CHANGED_QOS) {
5498                 unsigned long flags;
5499
5500                 spin_lock_irqsave(&il->lock, flags);
5501                 il->qos_data.qos_active = bss_conf->qos;
5502                 il_update_qos(il);
5503                 spin_unlock_irqrestore(&il->lock, flags);
5504         }
5505
5506         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5507                 /* FIXME: can we remove beacon_enabled ? */
5508                 if (vif->bss_conf.enable_beacon)
5509                         il->beacon_enabled = true;
5510                 else
5511                         il->beacon_enabled = false;
5512         }
5513
5514         if (changes & BSS_CHANGED_BSSID) {
5515                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5516
5517                 /*
5518                  * If there is currently a HW scan going on in the
5519                  * background then we need to cancel it else the RXON
5520                  * below/in post_associate will fail.
5521                  */
5522                 if (il_scan_cancel_timeout(il, 100)) {
5523                         IL_WARN("Aborted scan still in progress after 100ms\n");
5524                         D_MAC80211("leaving - scan abort failed.\n");
5525                         mutex_unlock(&il->mutex);
5526                         return;
5527                 }
5528
5529                 /* mac80211 only sets assoc when in STATION mode */
5530                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
5531                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5532                                ETH_ALEN);
5533
5534                         /* currently needed in a few places */
5535                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5536                 } else {
5537                         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5538                 }
5539
5540         }
5541
5542         /*
5543          * This needs to be after setting the BSSID in case
5544          * mac80211 decides to do both changes at once because
5545          * it will invoke post_associate.
5546          */
5547         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5548                 il_beacon_update(hw, vif);
5549
5550         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5551                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5552                 if (bss_conf->use_short_preamble)
5553                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5554                 else
5555                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5556         }
5557
5558         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5559                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5560                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5561                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5562                 else
5563                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5564                 if (bss_conf->use_cts_prot)
5565                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5566                 else
5567                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5568         }
5569
5570         if (changes & BSS_CHANGED_BASIC_RATES) {
5571                 /* XXX use this information
5572                  *
5573                  * To do that, remove code from il_set_rate() and put something
5574                  * like this here:
5575                  *
5576                  if (A-band)
5577                  il->staging.ofdm_basic_rates =
5578                  bss_conf->basic_rates;
5579                  else
5580                  il->staging.ofdm_basic_rates =
5581                  bss_conf->basic_rates >> 4;
5582                  il->staging.cck_basic_rates =
5583                  bss_conf->basic_rates & 0xF;
5584                  */
5585         }
5586
5587         if (changes & BSS_CHANGED_HT) {
5588                 il_ht_conf(il, vif);
5589
5590                 if (il->ops->hcmd->set_rxon_chain)
5591                         il->ops->hcmd->set_rxon_chain(il);
5592         }
5593
5594         if (changes & BSS_CHANGED_ASSOC) {
5595                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5596                 if (bss_conf->assoc) {
5597                         il->timestamp = bss_conf->timestamp;
5598
5599                         if (!il_is_rfkill(il))
5600                                 il->ops->legacy->post_associate(il);
5601                 } else
5602                         il_set_no_assoc(il, vif);
5603         }
5604
5605         if (changes && il_is_associated(il) && bss_conf->aid) {
5606                 D_MAC80211("Changes (%#x) while associated\n", changes);
5607                 ret = il_send_rxon_assoc(il);
5608                 if (!ret) {
5609                         /* Sync active_rxon with latest change. */
5610                         memcpy((void *)&il->active, &il->staging,
5611                                sizeof(struct il_rxon_cmd));
5612                 }
5613         }
5614
5615         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5616                 if (vif->bss_conf.enable_beacon) {
5617                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5618                                ETH_ALEN);
5619                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5620                         il->ops->legacy->config_ap(il);
5621                 } else
5622                         il_set_no_assoc(il, vif);
5623         }
5624
5625         if (changes & BSS_CHANGED_IBSS) {
5626                 ret =
5627                     il->ops->legacy->manage_ibss_station(il, vif,
5628                                                          bss_conf->ibss_joined);
5629                 if (ret)
5630                         IL_ERR("failed to %s IBSS station %pM\n",
5631                                bss_conf->ibss_joined ? "add" : "remove",
5632                                bss_conf->bssid);
5633         }
5634
5635         mutex_unlock(&il->mutex);
5636
5637         D_MAC80211("leave\n");
5638 }
5639 EXPORT_SYMBOL(il_mac_bss_info_changed);
5640
5641 irqreturn_t
5642 il_isr(int irq, void *data)
5643 {
5644         struct il_priv *il = data;
5645         u32 inta, inta_mask;
5646         u32 inta_fh;
5647         unsigned long flags;
5648         if (!il)
5649                 return IRQ_NONE;
5650
5651         spin_lock_irqsave(&il->lock, flags);
5652
5653         /* Disable (but don't clear!) interrupts here to avoid
5654          *    back-to-back ISRs and sporadic interrupts from our NIC.
5655          * If we have something to service, the tasklet will re-enable ints.
5656          * If we *don't* have something, we'll re-enable before leaving here. */
5657         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5658         _il_wr(il, CSR_INT_MASK, 0x00000000);
5659
5660         /* Discover which interrupts are active/pending */
5661         inta = _il_rd(il, CSR_INT);
5662         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5663
5664         /* Ignore interrupt if there's nothing in NIC to service.
5665          * This may be due to IRQ shared with another device,
5666          * or due to sporadic interrupts thrown from our NIC. */
5667         if (!inta && !inta_fh) {
5668                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5669                 goto none;
5670         }
5671
5672         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5673                 /* Hardware disappeared. It might have already raised
5674                  * an interrupt */
5675                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5676                 goto unplugged;
5677         }
5678
5679         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5680               inta_fh);
5681
5682         inta &= ~CSR_INT_BIT_SCD;
5683
5684         /* il_irq_tasklet() will service interrupts and re-enable them */
5685         if (likely(inta || inta_fh))
5686                 tasklet_schedule(&il->irq_tasklet);
5687
5688 unplugged:
5689         spin_unlock_irqrestore(&il->lock, flags);
5690         return IRQ_HANDLED;
5691
5692 none:
5693         /* re-enable interrupts here since we don't have anything to service. */
5694         /* only Re-enable if disabled by irq */
5695         if (test_bit(S_INT_ENABLED, &il->status))
5696                 il_enable_interrupts(il);
5697         spin_unlock_irqrestore(&il->lock, flags);
5698         return IRQ_NONE;
5699 }
5700 EXPORT_SYMBOL(il_isr);
5701
5702 /*
5703  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5704  *  function.
5705  */
5706 void
5707 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5708                      __le16 fc, __le32 *tx_flags)
5709 {
5710         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5711                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5712                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5713                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5714
5715                 if (!ieee80211_is_mgmt(fc))
5716                         return;
5717
5718                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5719                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5720                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5721                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5722                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5723                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5724                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5725                         break;
5726                 }
5727         } else if (info->control.rates[0].
5728                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5729                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5730                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5731                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5732         }
5733 }
5734 EXPORT_SYMBOL(il_tx_cmd_protection);