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_ops.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_ops.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_ops.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 =
 802             il->ops->lib->eeprom_ops.regulatory_bands[eep_band - 1];
 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->ops->lib->eeprom_ops.regulatory_bands[5] ==
1004             EEPROM_REGULATORY_BAND_NO_HT40 &&
1005             il->ops->lib->eeprom_ops.regulatory_bands[6] ==
1006             EEPROM_REGULATORY_BAND_NO_HT40)
1007                 return 0;
1008
1009         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1010         for (band = 6; band <= 7; band++) {
1011                 enum ieee80211_band ieeeband;
1012
1013                 il_init_band_reference(il, band, &eeprom_ch_count,
1014                                        &eeprom_ch_info, &eeprom_ch_idx);
1015
1016                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1017                 ieeeband =
1018                     (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1019
1020                 /* Loop through each band adding each of the channels */
1021                 for (ch = 0; ch < eeprom_ch_count; ch++) {
1022                         /* Set up driver's info for lower half */
1023                         il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1024                                               &eeprom_ch_info[ch],
1025                                               IEEE80211_CHAN_NO_HT40PLUS);
1026
1027                         /* Set up driver's info for upper half */
1028                         il_mod_ht40_chan_info(il, ieeeband,
1029                                               eeprom_ch_idx[ch] + 4,
1030                                               &eeprom_ch_info[ch],
1031                                               IEEE80211_CHAN_NO_HT40MINUS);
1032                 }
1033         }
1034
1035         return 0;
1036 }
1037 EXPORT_SYMBOL(il_init_channel_map);
1038
1039 /*
1040  * il_free_channel_map - undo allocations in il_init_channel_map
1041  */
1042 void
1043 il_free_channel_map(struct il_priv *il)
1044 {
1045         kfree(il->channel_info);
1046         il->channel_count = 0;
1047 }
1048 EXPORT_SYMBOL(il_free_channel_map);
1049
1050 /**
1051  * il_get_channel_info - Find driver's ilate channel info
1052  *
1053  * Based on band and channel number.
1054  */
1055 const struct il_channel_info *
1056 il_get_channel_info(const struct il_priv *il, enum ieee80211_band band,
1057                     u16 channel)
1058 {
1059         int i;
1060
1061         switch (band) {
1062         case IEEE80211_BAND_5GHZ:
1063                 for (i = 14; i < il->channel_count; i++) {
1064                         if (il->channel_info[i].channel == channel)
1065                                 return &il->channel_info[i];
1066                 }
1067                 break;
1068         case IEEE80211_BAND_2GHZ:
1069                 if (channel >= 1 && channel <= 14)
1070                         return &il->channel_info[channel - 1];
1071                 break;
1072         default:
1073                 BUG();
1074         }
1075
1076         return NULL;
1077 }
1078 EXPORT_SYMBOL(il_get_channel_info);
1079
1080 /*
1081  * Setting power level allows the card to go to sleep when not busy.
1082  *
1083  * We calculate a sleep command based on the required latency, which
1084  * we get from mac80211. In order to handle thermal throttling, we can
1085  * also use pre-defined power levels.
1086  */
1087
1088 /*
1089  * This defines the old power levels. They are still used by default
1090  * (level 1) and for thermal throttle (levels 3 through 5)
1091  */
1092
1093 struct il_power_vec_entry {
1094         struct il_powertable_cmd cmd;
1095         u8 no_dtim;             /* number of skip dtim */
1096 };
1097
1098 static void
1099 il_power_sleep_cam_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1100 {
1101         memset(cmd, 0, sizeof(*cmd));
1102
1103         if (il->power_data.pci_pm)
1104                 cmd->flags |= IL_POWER_PCI_PM_MSK;
1105
1106         D_POWER("Sleep command for CAM\n");
1107 }
1108
1109 static int
1110 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1111 {
1112         D_POWER("Sending power/sleep command\n");
1113         D_POWER("Flags value = 0x%08X\n", cmd->flags);
1114         D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1115         D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1116         D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1117                 le32_to_cpu(cmd->sleep_interval[0]),
1118                 le32_to_cpu(cmd->sleep_interval[1]),
1119                 le32_to_cpu(cmd->sleep_interval[2]),
1120                 le32_to_cpu(cmd->sleep_interval[3]),
1121                 le32_to_cpu(cmd->sleep_interval[4]));
1122
1123         return il_send_cmd_pdu(il, C_POWER_TBL,
1124                                sizeof(struct il_powertable_cmd), cmd);
1125 }
1126
1127 int
1128 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1129 {
1130         int ret;
1131         bool update_chains;
1132
1133         lockdep_assert_held(&il->mutex);
1134
1135         /* Don't update the RX chain when chain noise calibration is running */
1136         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1137             il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1138
1139         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1140                 return 0;
1141
1142         if (!il_is_ready_rf(il))
1143                 return -EIO;
1144
1145         /* scan complete use sleep_power_next, need to be updated */
1146         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1147         if (test_bit(S_SCANNING, &il->status) && !force) {
1148                 D_INFO("Defer power set mode while scanning\n");
1149                 return 0;
1150         }
1151
1152         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1153                 set_bit(S_POWER_PMI, &il->status);
1154
1155         ret = il_set_power(il, cmd);
1156         if (!ret) {
1157                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1158                         clear_bit(S_POWER_PMI, &il->status);
1159
1160                 if (il->ops->lib->update_chain_flags && update_chains)
1161                         il->ops->lib->update_chain_flags(il);
1162                 else if (il->ops->lib->update_chain_flags)
1163                         D_POWER("Cannot update the power, chain noise "
1164                                 "calibration running: %d\n",
1165                                 il->chain_noise_data.state);
1166
1167                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1168         } else
1169                 IL_ERR("set power fail, ret = %d", ret);
1170
1171         return ret;
1172 }
1173
1174 int
1175 il_power_update_mode(struct il_priv *il, bool force)
1176 {
1177         struct il_powertable_cmd cmd;
1178
1179         il_power_sleep_cam_cmd(il, &cmd);
1180         return il_power_set_mode(il, &cmd, force);
1181 }
1182 EXPORT_SYMBOL(il_power_update_mode);
1183
1184 /* initialize to default */
1185 void
1186 il_power_initialize(struct il_priv *il)
1187 {
1188         u16 lctl = il_pcie_link_ctl(il);
1189
1190         il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
1191
1192         il->power_data.debug_sleep_level_override = -1;
1193
1194         memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1195 }
1196 EXPORT_SYMBOL(il_power_initialize);
1197
1198 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1199  * sending probe req.  This should be set long enough to hear probe responses
1200  * from more than one AP.  */
1201 #define IL_ACTIVE_DWELL_TIME_24    (30) /* all times in msec */
1202 #define IL_ACTIVE_DWELL_TIME_52    (20)
1203
1204 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1205 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1206
1207 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1208  * Must be set longer than active dwell time.
1209  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1210 #define IL_PASSIVE_DWELL_TIME_24   (20) /* all times in msec */
1211 #define IL_PASSIVE_DWELL_TIME_52   (10)
1212 #define IL_PASSIVE_DWELL_BASE      (100)
1213 #define IL_CHANNEL_TUNE_TIME       5
1214
1215 static int
1216 il_send_scan_abort(struct il_priv *il)
1217 {
1218         int ret;
1219         struct il_rx_pkt *pkt;
1220         struct il_host_cmd cmd = {
1221                 .id = C_SCAN_ABORT,
1222                 .flags = CMD_WANT_SKB,
1223         };
1224
1225         /* Exit instantly with error when device is not ready
1226          * to receive scan abort command or it does not perform
1227          * hardware scan currently */
1228         if (!test_bit(S_READY, &il->status) ||
1229             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1230             !test_bit(S_SCAN_HW, &il->status) ||
1231             test_bit(S_FW_ERROR, &il->status) ||
1232             test_bit(S_EXIT_PENDING, &il->status))
1233                 return -EIO;
1234
1235         ret = il_send_cmd_sync(il, &cmd);
1236         if (ret)
1237                 return ret;
1238
1239         pkt = (struct il_rx_pkt *)cmd.reply_page;
1240         if (pkt->u.status != CAN_ABORT_STATUS) {
1241                 /* The scan abort will return 1 for success or
1242                  * 2 for "failure".  A failure condition can be
1243                  * due to simply not being in an active scan which
1244                  * can occur if we send the scan abort before we
1245                  * the microcode has notified us that a scan is
1246                  * completed. */
1247                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1248                 ret = -EIO;
1249         }
1250
1251         il_free_pages(il, cmd.reply_page);
1252         return ret;
1253 }
1254
1255 static void
1256 il_complete_scan(struct il_priv *il, bool aborted)
1257 {
1258         /* check if scan was requested from mac80211 */
1259         if (il->scan_request) {
1260                 D_SCAN("Complete scan in mac80211\n");
1261                 ieee80211_scan_completed(il->hw, aborted);
1262         }
1263
1264         il->scan_vif = NULL;
1265         il->scan_request = NULL;
1266 }
1267
1268 void
1269 il_force_scan_end(struct il_priv *il)
1270 {
1271         lockdep_assert_held(&il->mutex);
1272
1273         if (!test_bit(S_SCANNING, &il->status)) {
1274                 D_SCAN("Forcing scan end while not scanning\n");
1275                 return;
1276         }
1277
1278         D_SCAN("Forcing scan end\n");
1279         clear_bit(S_SCANNING, &il->status);
1280         clear_bit(S_SCAN_HW, &il->status);
1281         clear_bit(S_SCAN_ABORTING, &il->status);
1282         il_complete_scan(il, true);
1283 }
1284
1285 static void
1286 il_do_scan_abort(struct il_priv *il)
1287 {
1288         int ret;
1289
1290         lockdep_assert_held(&il->mutex);
1291
1292         if (!test_bit(S_SCANNING, &il->status)) {
1293                 D_SCAN("Not performing scan to abort\n");
1294                 return;
1295         }
1296
1297         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1298                 D_SCAN("Scan abort in progress\n");
1299                 return;
1300         }
1301
1302         ret = il_send_scan_abort(il);
1303         if (ret) {
1304                 D_SCAN("Send scan abort failed %d\n", ret);
1305                 il_force_scan_end(il);
1306         } else
1307                 D_SCAN("Successfully send scan abort\n");
1308 }
1309
1310 /**
1311  * il_scan_cancel - Cancel any currently executing HW scan
1312  */
1313 int
1314 il_scan_cancel(struct il_priv *il)
1315 {
1316         D_SCAN("Queuing abort scan\n");
1317         queue_work(il->workqueue, &il->abort_scan);
1318         return 0;
1319 }
1320 EXPORT_SYMBOL(il_scan_cancel);
1321
1322 /**
1323  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1324  * @ms: amount of time to wait (in milliseconds) for scan to abort
1325  *
1326  */
1327 int
1328 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1329 {
1330         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1331
1332         lockdep_assert_held(&il->mutex);
1333
1334         D_SCAN("Scan cancel timeout\n");
1335
1336         il_do_scan_abort(il);
1337
1338         while (time_before_eq(jiffies, timeout)) {
1339                 if (!test_bit(S_SCAN_HW, &il->status))
1340                         break;
1341                 msleep(20);
1342         }
1343
1344         return test_bit(S_SCAN_HW, &il->status);
1345 }
1346 EXPORT_SYMBOL(il_scan_cancel_timeout);
1347
1348 /* Service response to C_SCAN (0x80) */
1349 static void
1350 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1351 {
1352 #ifdef CONFIG_IWLEGACY_DEBUG
1353         struct il_rx_pkt *pkt = rxb_addr(rxb);
1354         struct il_scanreq_notification *notif =
1355             (struct il_scanreq_notification *)pkt->u.raw;
1356
1357         D_SCAN("Scan request status = 0x%x\n", notif->status);
1358 #endif
1359 }
1360
1361 /* Service N_SCAN_START (0x82) */
1362 static void
1363 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1364 {
1365         struct il_rx_pkt *pkt = rxb_addr(rxb);
1366         struct il_scanstart_notification *notif =
1367             (struct il_scanstart_notification *)pkt->u.raw;
1368         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1369         D_SCAN("Scan start: " "%d [802.11%s] "
1370                "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1371                notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1372                le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1373 }
1374
1375 /* Service N_SCAN_RESULTS (0x83) */
1376 static void
1377 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1378 {
1379 #ifdef CONFIG_IWLEGACY_DEBUG
1380         struct il_rx_pkt *pkt = rxb_addr(rxb);
1381         struct il_scanresults_notification *notif =
1382             (struct il_scanresults_notification *)pkt->u.raw;
1383
1384         D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1385                "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1386                le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1387                le32_to_cpu(notif->stats[0]),
1388                le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1389 #endif
1390 }
1391
1392 /* Service N_SCAN_COMPLETE (0x84) */
1393 static void
1394 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1395 {
1396
1397 #ifdef CONFIG_IWLEGACY_DEBUG
1398         struct il_rx_pkt *pkt = rxb_addr(rxb);
1399         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1400 #endif
1401
1402         D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1403                scan_notif->scanned_channels, scan_notif->tsf_low,
1404                scan_notif->tsf_high, scan_notif->status);
1405
1406         /* The HW is no longer scanning */
1407         clear_bit(S_SCAN_HW, &il->status);
1408
1409         D_SCAN("Scan on %sGHz took %dms\n",
1410                (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1411                jiffies_to_msecs(jiffies - il->scan_start));
1412
1413         queue_work(il->workqueue, &il->scan_completed);
1414 }
1415
1416 void
1417 il_setup_rx_scan_handlers(struct il_priv *il)
1418 {
1419         /* scan handlers */
1420         il->handlers[C_SCAN] = il_hdl_scan;
1421         il->handlers[N_SCAN_START] = il_hdl_scan_start;
1422         il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1423         il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1424 }
1425 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1426
1427 inline u16
1428 il_get_active_dwell_time(struct il_priv *il, enum ieee80211_band band,
1429                          u8 n_probes)
1430 {
1431         if (band == IEEE80211_BAND_5GHZ)
1432                 return IL_ACTIVE_DWELL_TIME_52 +
1433                     IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1434         else
1435                 return IL_ACTIVE_DWELL_TIME_24 +
1436                     IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1437 }
1438 EXPORT_SYMBOL(il_get_active_dwell_time);
1439
1440 u16
1441 il_get_passive_dwell_time(struct il_priv *il, enum ieee80211_band band,
1442                           struct ieee80211_vif *vif)
1443 {
1444         u16 value;
1445
1446         u16 passive =
1447             (band ==
1448              IEEE80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1449             IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1450             IL_PASSIVE_DWELL_TIME_52;
1451
1452         if (il_is_any_associated(il)) {
1453                 /*
1454                  * If we're associated, we clamp the maximum passive
1455                  * dwell time to be 98% of the smallest beacon interval
1456                  * (minus 2 * channel tune time)
1457                  */
1458                 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1459                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1460                         value = IL_PASSIVE_DWELL_BASE;
1461                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1462                 passive = min(value, passive);
1463         }
1464
1465         return passive;
1466 }
1467 EXPORT_SYMBOL(il_get_passive_dwell_time);
1468
1469 void
1470 il_init_scan_params(struct il_priv *il)
1471 {
1472         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1473         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1474                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1475         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1476                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1477 }
1478 EXPORT_SYMBOL(il_init_scan_params);
1479
1480 static int
1481 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1482 {
1483         int ret;
1484
1485         lockdep_assert_held(&il->mutex);
1486
1487         if (WARN_ON(!il->ops->utils->request_scan))
1488                 return -EOPNOTSUPP;
1489
1490         cancel_delayed_work(&il->scan_check);
1491
1492         if (!il_is_ready_rf(il)) {
1493                 IL_WARN("Request scan called when driver not ready.\n");
1494                 return -EIO;
1495         }
1496
1497         if (test_bit(S_SCAN_HW, &il->status)) {
1498                 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1499                 return -EBUSY;
1500         }
1501
1502         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1503                 D_SCAN("Scan request while abort pending.\n");
1504                 return -EBUSY;
1505         }
1506
1507         D_SCAN("Starting scan...\n");
1508
1509         set_bit(S_SCANNING, &il->status);
1510         il->scan_start = jiffies;
1511
1512         ret = il->ops->utils->request_scan(il, vif);
1513         if (ret) {
1514                 clear_bit(S_SCANNING, &il->status);
1515                 return ret;
1516         }
1517
1518         queue_delayed_work(il->workqueue, &il->scan_check,
1519                            IL_SCAN_CHECK_WATCHDOG);
1520
1521         return 0;
1522 }
1523
1524 int
1525 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1526                struct cfg80211_scan_request *req)
1527 {
1528         struct il_priv *il = hw->priv;
1529         int ret;
1530
1531         D_MAC80211("enter\n");
1532
1533         if (req->n_channels == 0)
1534                 return -EINVAL;
1535
1536         mutex_lock(&il->mutex);
1537
1538         if (test_bit(S_SCANNING, &il->status)) {
1539                 D_SCAN("Scan already in progress.\n");
1540                 ret = -EAGAIN;
1541                 goto out_unlock;
1542         }
1543
1544         /* mac80211 will only ask for one band at a time */
1545         il->scan_request = req;
1546         il->scan_vif = vif;
1547         il->scan_band = req->channels[0]->band;
1548
1549         ret = il_scan_initiate(il, vif);
1550
1551         D_MAC80211("leave\n");
1552
1553 out_unlock:
1554         mutex_unlock(&il->mutex);
1555
1556         return ret;
1557 }
1558 EXPORT_SYMBOL(il_mac_hw_scan);
1559
1560 static void
1561 il_bg_scan_check(struct work_struct *data)
1562 {
1563         struct il_priv *il =
1564             container_of(data, struct il_priv, scan_check.work);
1565
1566         D_SCAN("Scan check work\n");
1567
1568         /* Since we are here firmware does not finish scan and
1569          * most likely is in bad shape, so we don't bother to
1570          * send abort command, just force scan complete to mac80211 */
1571         mutex_lock(&il->mutex);
1572         il_force_scan_end(il);
1573         mutex_unlock(&il->mutex);
1574 }
1575
1576 /**
1577  * il_fill_probe_req - fill in all required fields and IE for probe request
1578  */
1579
1580 u16
1581 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1582                   const u8 *ta, const u8 *ies, int ie_len, int left)
1583 {
1584         int len = 0;
1585         u8 *pos = NULL;
1586
1587         /* Make sure there is enough space for the probe request,
1588          * two mandatory IEs and the data */
1589         left -= 24;
1590         if (left < 0)
1591                 return 0;
1592
1593         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1594         memcpy(frame->da, il_bcast_addr, ETH_ALEN);
1595         memcpy(frame->sa, ta, ETH_ALEN);
1596         memcpy(frame->bssid, il_bcast_addr, ETH_ALEN);
1597         frame->seq_ctrl = 0;
1598
1599         len += 24;
1600
1601         /* ...next IE... */
1602         pos = &frame->u.probe_req.variable[0];
1603
1604         /* fill in our indirect SSID IE */
1605         left -= 2;
1606         if (left < 0)
1607                 return 0;
1608         *pos++ = WLAN_EID_SSID;
1609         *pos++ = 0;
1610
1611         len += 2;
1612
1613         if (WARN_ON(left < ie_len))
1614                 return len;
1615
1616         if (ies && ie_len) {
1617                 memcpy(pos, ies, ie_len);
1618                 len += ie_len;
1619         }
1620
1621         return (u16) len;
1622 }
1623 EXPORT_SYMBOL(il_fill_probe_req);
1624
1625 static void
1626 il_bg_abort_scan(struct work_struct *work)
1627 {
1628         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1629
1630         D_SCAN("Abort scan work\n");
1631
1632         /* We keep scan_check work queued in case when firmware will not
1633          * report back scan completed notification */
1634         mutex_lock(&il->mutex);
1635         il_scan_cancel_timeout(il, 200);
1636         mutex_unlock(&il->mutex);
1637 }
1638
1639 static void
1640 il_bg_scan_completed(struct work_struct *work)
1641 {
1642         struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1643         bool aborted;
1644
1645         D_SCAN("Completed scan.\n");
1646
1647         cancel_delayed_work(&il->scan_check);
1648
1649         mutex_lock(&il->mutex);
1650
1651         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1652         if (aborted)
1653                 D_SCAN("Aborted scan completed.\n");
1654
1655         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1656                 D_SCAN("Scan already completed.\n");
1657                 goto out_settings;
1658         }
1659
1660         il_complete_scan(il, aborted);
1661
1662 out_settings:
1663         /* Can we still talk to firmware ? */
1664         if (!il_is_ready_rf(il))
1665                 goto out;
1666
1667         /*
1668          * We do not commit power settings while scan is pending,
1669          * do it now if the settings changed.
1670          */
1671         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1672         il_set_tx_power(il, il->tx_power_next, false);
1673
1674         il->ops->utils->post_scan(il);
1675
1676 out:
1677         mutex_unlock(&il->mutex);
1678 }
1679
1680 void
1681 il_setup_scan_deferred_work(struct il_priv *il)
1682 {
1683         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1684         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1685         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1686 }
1687 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1688
1689 void
1690 il_cancel_scan_deferred_work(struct il_priv *il)
1691 {
1692         cancel_work_sync(&il->abort_scan);
1693         cancel_work_sync(&il->scan_completed);
1694
1695         if (cancel_delayed_work_sync(&il->scan_check)) {
1696                 mutex_lock(&il->mutex);
1697                 il_force_scan_end(il);
1698                 mutex_unlock(&il->mutex);
1699         }
1700 }
1701 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1702
1703 /* il->sta_lock must be held */
1704 static void
1705 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1706 {
1707
1708         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1709                 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1710                        sta_id, il->stations[sta_id].sta.sta.addr);
1711
1712         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1713                 D_ASSOC("STA id %u addr %pM already present"
1714                         " in uCode (according to driver)\n", sta_id,
1715                         il->stations[sta_id].sta.sta.addr);
1716         } else {
1717                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1718                 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1719                         il->stations[sta_id].sta.sta.addr);
1720         }
1721 }
1722
1723 static int
1724 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1725                         struct il_rx_pkt *pkt, bool sync)
1726 {
1727         u8 sta_id = addsta->sta.sta_id;
1728         unsigned long flags;
1729         int ret = -EIO;
1730
1731         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1732                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1733                 return ret;
1734         }
1735
1736         D_INFO("Processing response for adding station %u\n", sta_id);
1737
1738         spin_lock_irqsave(&il->sta_lock, flags);
1739
1740         switch (pkt->u.add_sta.status) {
1741         case ADD_STA_SUCCESS_MSK:
1742                 D_INFO("C_ADD_STA PASSED\n");
1743                 il_sta_ucode_activate(il, sta_id);
1744                 ret = 0;
1745                 break;
1746         case ADD_STA_NO_ROOM_IN_TBL:
1747                 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1748                 break;
1749         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1750                 IL_ERR("Adding station %d failed, no block ack resource.\n",
1751                        sta_id);
1752                 break;
1753         case ADD_STA_MODIFY_NON_EXIST_STA:
1754                 IL_ERR("Attempting to modify non-existing station %d\n",
1755                        sta_id);
1756                 break;
1757         default:
1758                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1759                 break;
1760         }
1761
1762         D_INFO("%s station id %u addr %pM\n",
1763                il->stations[sta_id].sta.mode ==
1764                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1765                il->stations[sta_id].sta.sta.addr);
1766
1767         /*
1768          * XXX: The MAC address in the command buffer is often changed from
1769          * the original sent to the device. That is, the MAC address
1770          * written to the command buffer often is not the same MAC address
1771          * read from the command buffer when the command returns. This
1772          * issue has not yet been resolved and this debugging is left to
1773          * observe the problem.
1774          */
1775         D_INFO("%s station according to cmd buffer %pM\n",
1776                il->stations[sta_id].sta.mode ==
1777                STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1778         spin_unlock_irqrestore(&il->sta_lock, flags);
1779
1780         return ret;
1781 }
1782
1783 static void
1784 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1785                     struct il_rx_pkt *pkt)
1786 {
1787         struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1788
1789         il_process_add_sta_resp(il, addsta, pkt, false);
1790
1791 }
1792
1793 int
1794 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1795 {
1796         struct il_rx_pkt *pkt = NULL;
1797         int ret = 0;
1798         u8 data[sizeof(*sta)];
1799         struct il_host_cmd cmd = {
1800                 .id = C_ADD_STA,
1801                 .flags = flags,
1802                 .data = data,
1803         };
1804         u8 sta_id __maybe_unused = sta->sta.sta_id;
1805
1806         D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1807                flags & CMD_ASYNC ? "a" : "");
1808
1809         if (flags & CMD_ASYNC)
1810                 cmd.callback = il_add_sta_callback;
1811         else {
1812                 cmd.flags |= CMD_WANT_SKB;
1813                 might_sleep();
1814         }
1815
1816         cmd.len = il->ops->utils->build_addsta_hcmd(sta, data);
1817         ret = il_send_cmd(il, &cmd);
1818
1819         if (ret || (flags & CMD_ASYNC))
1820                 return ret;
1821
1822         if (ret == 0) {
1823                 pkt = (struct il_rx_pkt *)cmd.reply_page;
1824                 ret = il_process_add_sta_resp(il, sta, pkt, true);
1825         }
1826         il_free_pages(il, cmd.reply_page);
1827
1828         return ret;
1829 }
1830 EXPORT_SYMBOL(il_send_add_sta);
1831
1832 static void
1833 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1834 {
1835         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1836         __le32 sta_flags;
1837         u8 mimo_ps_mode;
1838
1839         if (!sta || !sta_ht_inf->ht_supported)
1840                 goto done;
1841
1842         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
1843         D_ASSOC("spatial multiplexing power save mode: %s\n",
1844                 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? "static" :
1845                 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? "dynamic" :
1846                 "disabled");
1847
1848         sta_flags = il->stations[idx].sta.station_flags;
1849
1850         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1851
1852         switch (mimo_ps_mode) {
1853         case WLAN_HT_CAP_SM_PS_STATIC:
1854                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1855                 break;
1856         case WLAN_HT_CAP_SM_PS_DYNAMIC:
1857                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1858                 break;
1859         case WLAN_HT_CAP_SM_PS_DISABLED:
1860                 break;
1861         default:
1862                 IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode);
1863                 break;
1864         }
1865
1866         sta_flags |=
1867             cpu_to_le32((u32) sta_ht_inf->
1868                         ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1869
1870         sta_flags |=
1871             cpu_to_le32((u32) sta_ht_inf->
1872                         ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1873
1874         if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1875                 sta_flags |= STA_FLG_HT40_EN_MSK;
1876         else
1877                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1878
1879         il->stations[idx].sta.station_flags = sta_flags;
1880 done:
1881         return;
1882 }
1883
1884 /**
1885  * il_prep_station - Prepare station information for addition
1886  *
1887  * should be called with sta_lock held
1888  */
1889 u8
1890 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1891                 struct ieee80211_sta *sta)
1892 {
1893         struct il_station_entry *station;
1894         int i;
1895         u8 sta_id = IL_INVALID_STATION;
1896         u16 rate;
1897
1898         if (is_ap)
1899                 sta_id = IL_AP_ID;
1900         else if (is_broadcast_ether_addr(addr))
1901                 sta_id = il->hw_params.bcast_id;
1902         else
1903                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1904                         if (!compare_ether_addr
1905                             (il->stations[i].sta.sta.addr, addr)) {
1906                                 sta_id = i;
1907                                 break;
1908                         }
1909
1910                         if (!il->stations[i].used &&
1911                             sta_id == IL_INVALID_STATION)
1912                                 sta_id = i;
1913                 }
1914
1915         /*
1916          * These two conditions have the same outcome, but keep them
1917          * separate
1918          */
1919         if (unlikely(sta_id == IL_INVALID_STATION))
1920                 return sta_id;
1921
1922         /*
1923          * uCode is not able to deal with multiple requests to add a
1924          * station. Keep track if one is in progress so that we do not send
1925          * another.
1926          */
1927         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1928                 D_INFO("STA %d already in process of being added.\n", sta_id);
1929                 return sta_id;
1930         }
1931
1932         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1933             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1934             !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) {
1935                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1936                         sta_id, addr);
1937                 return sta_id;
1938         }
1939
1940         station = &il->stations[sta_id];
1941         station->used = IL_STA_DRIVER_ACTIVE;
1942         D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1943         il->num_stations++;
1944
1945         /* Set up the C_ADD_STA command to send to device */
1946         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1947         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1948         station->sta.mode = 0;
1949         station->sta.sta.sta_id = sta_id;
1950         station->sta.station_flags = 0;
1951
1952         /*
1953          * OK to call unconditionally, since local stations (IBSS BSSID
1954          * STA and broadcast STA) pass in a NULL sta, and mac80211
1955          * doesn't allow HT IBSS.
1956          */
1957         il_set_ht_add_station(il, sta_id, sta);
1958
1959         /* 3945 only */
1960         rate = (il->band == IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1961         /* Turn on both antennas for the station... */
1962         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1963
1964         return sta_id;
1965
1966 }
1967 EXPORT_SYMBOL_GPL(il_prep_station);
1968
1969 #define STA_WAIT_TIMEOUT (HZ/2)
1970
1971 /**
1972  * il_add_station_common -
1973  */
1974 int
1975 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
1976                       struct ieee80211_sta *sta, u8 *sta_id_r)
1977 {
1978         unsigned long flags_spin;
1979         int ret = 0;
1980         u8 sta_id;
1981         struct il_addsta_cmd sta_cmd;
1982
1983         *sta_id_r = 0;
1984         spin_lock_irqsave(&il->sta_lock, flags_spin);
1985         sta_id = il_prep_station(il, addr, is_ap, sta);
1986         if (sta_id == IL_INVALID_STATION) {
1987                 IL_ERR("Unable to prepare station %pM for addition\n", addr);
1988                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1989                 return -EINVAL;
1990         }
1991
1992         /*
1993          * uCode is not able to deal with multiple requests to add a
1994          * station. Keep track if one is in progress so that we do not send
1995          * another.
1996          */
1997         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1998                 D_INFO("STA %d already in process of being added.\n", sta_id);
1999                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2000                 return -EEXIST;
2001         }
2002
2003         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2004             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2005                 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2006                         sta_id, addr);
2007                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2008                 return -EEXIST;
2009         }
2010
2011         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2012         memcpy(&sta_cmd, &il->stations[sta_id].sta,
2013                sizeof(struct il_addsta_cmd));
2014         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2015
2016         /* Add station to device's station table */
2017         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2018         if (ret) {
2019                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2020                 IL_ERR("Adding station %pM failed.\n",
2021                        il->stations[sta_id].sta.sta.addr);
2022                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2023                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2024                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2025         }
2026         *sta_id_r = sta_id;
2027         return ret;
2028 }
2029 EXPORT_SYMBOL(il_add_station_common);
2030
2031 /**
2032  * il_sta_ucode_deactivate - deactivate ucode status for a station
2033  *
2034  * il->sta_lock must be held
2035  */
2036 static void
2037 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2038 {
2039         /* Ucode must be active and driver must be non active */
2040         if ((il->stations[sta_id].
2041              used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2042             IL_STA_UCODE_ACTIVE)
2043                 IL_ERR("removed non active STA %u\n", sta_id);
2044
2045         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2046
2047         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2048         D_ASSOC("Removed STA %u\n", sta_id);
2049 }
2050
2051 static int
2052 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2053                        bool temporary)
2054 {
2055         struct il_rx_pkt *pkt;
2056         int ret;
2057
2058         unsigned long flags_spin;
2059         struct il_rem_sta_cmd rm_sta_cmd;
2060
2061         struct il_host_cmd cmd = {
2062                 .id = C_REM_STA,
2063                 .len = sizeof(struct il_rem_sta_cmd),
2064                 .flags = CMD_SYNC,
2065                 .data = &rm_sta_cmd,
2066         };
2067
2068         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2069         rm_sta_cmd.num_sta = 1;
2070         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2071
2072         cmd.flags |= CMD_WANT_SKB;
2073
2074         ret = il_send_cmd(il, &cmd);
2075
2076         if (ret)
2077                 return ret;
2078
2079         pkt = (struct il_rx_pkt *)cmd.reply_page;
2080         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2081                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2082                 ret = -EIO;
2083         }
2084
2085         if (!ret) {
2086                 switch (pkt->u.rem_sta.status) {
2087                 case REM_STA_SUCCESS_MSK:
2088                         if (!temporary) {
2089                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2090                                 il_sta_ucode_deactivate(il, sta_id);
2091                                 spin_unlock_irqrestore(&il->sta_lock,
2092                                                        flags_spin);
2093                         }
2094                         D_ASSOC("C_REM_STA PASSED\n");
2095                         break;
2096                 default:
2097                         ret = -EIO;
2098                         IL_ERR("C_REM_STA failed\n");
2099                         break;
2100                 }
2101         }
2102         il_free_pages(il, cmd.reply_page);
2103
2104         return ret;
2105 }
2106
2107 /**
2108  * il_remove_station - Remove driver's knowledge of station.
2109  */
2110 int
2111 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2112 {
2113         unsigned long flags;
2114
2115         if (!il_is_ready(il)) {
2116                 D_INFO("Unable to remove station %pM, device not ready.\n",
2117                        addr);
2118                 /*
2119                  * It is typical for stations to be removed when we are
2120                  * going down. Return success since device will be down
2121                  * soon anyway
2122                  */
2123                 return 0;
2124         }
2125
2126         D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2127
2128         if (WARN_ON(sta_id == IL_INVALID_STATION))
2129                 return -EINVAL;
2130
2131         spin_lock_irqsave(&il->sta_lock, flags);
2132
2133         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2134                 D_INFO("Removing %pM but non DRIVER active\n", addr);
2135                 goto out_err;
2136         }
2137
2138         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2139                 D_INFO("Removing %pM but non UCODE active\n", addr);
2140                 goto out_err;
2141         }
2142
2143         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2144                 kfree(il->stations[sta_id].lq);
2145                 il->stations[sta_id].lq = NULL;
2146         }
2147
2148         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2149
2150         il->num_stations--;
2151
2152         BUG_ON(il->num_stations < 0);
2153
2154         spin_unlock_irqrestore(&il->sta_lock, flags);
2155
2156         return il_send_remove_station(il, addr, sta_id, false);
2157 out_err:
2158         spin_unlock_irqrestore(&il->sta_lock, flags);
2159         return -EINVAL;
2160 }
2161 EXPORT_SYMBOL_GPL(il_remove_station);
2162
2163 /**
2164  * il_clear_ucode_stations - clear ucode station table bits
2165  *
2166  * This function clears all the bits in the driver indicating
2167  * which stations are active in the ucode. Call when something
2168  * other than explicit station management would cause this in
2169  * the ucode, e.g. unassociated RXON.
2170  */
2171 void
2172 il_clear_ucode_stations(struct il_priv *il)
2173 {
2174         int i;
2175         unsigned long flags_spin;
2176         bool cleared = false;
2177
2178         D_INFO("Clearing ucode stations in driver\n");
2179
2180         spin_lock_irqsave(&il->sta_lock, flags_spin);
2181         for (i = 0; i < il->hw_params.max_stations; i++) {
2182                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2183                         D_INFO("Clearing ucode active for station %d\n", i);
2184                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2185                         cleared = true;
2186                 }
2187         }
2188         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2189
2190         if (!cleared)
2191                 D_INFO("No active stations found to be cleared\n");
2192 }
2193 EXPORT_SYMBOL(il_clear_ucode_stations);
2194
2195 /**
2196  * il_restore_stations() - Restore driver known stations to device
2197  *
2198  * All stations considered active by driver, but not present in ucode, is
2199  * restored.
2200  *
2201  * Function sleeps.
2202  */
2203 void
2204 il_restore_stations(struct il_priv *il)
2205 {
2206         struct il_addsta_cmd sta_cmd;
2207         struct il_link_quality_cmd lq;
2208         unsigned long flags_spin;
2209         int i;
2210         bool found = false;
2211         int ret;
2212         bool send_lq;
2213
2214         if (!il_is_ready(il)) {
2215                 D_INFO("Not ready yet, not restoring any stations.\n");
2216                 return;
2217         }
2218
2219         D_ASSOC("Restoring all known stations ... start.\n");
2220         spin_lock_irqsave(&il->sta_lock, flags_spin);
2221         for (i = 0; i < il->hw_params.max_stations; i++) {
2222                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2223                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2224                         D_ASSOC("Restoring sta %pM\n",
2225                                 il->stations[i].sta.sta.addr);
2226                         il->stations[i].sta.mode = 0;
2227                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2228                         found = true;
2229                 }
2230         }
2231
2232         for (i = 0; i < il->hw_params.max_stations; i++) {
2233                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2234                         memcpy(&sta_cmd, &il->stations[i].sta,
2235                                sizeof(struct il_addsta_cmd));
2236                         send_lq = false;
2237                         if (il->stations[i].lq) {
2238                                 memcpy(&lq, il->stations[i].lq,
2239                                        sizeof(struct il_link_quality_cmd));
2240                                 send_lq = true;
2241                         }
2242                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2243                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2244                         if (ret) {
2245                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2246                                 IL_ERR("Adding station %pM failed.\n",
2247                                        il->stations[i].sta.sta.addr);
2248                                 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2249                                 il->stations[i].used &=
2250                                     ~IL_STA_UCODE_INPROGRESS;
2251                                 spin_unlock_irqrestore(&il->sta_lock,
2252                                                        flags_spin);
2253                         }
2254                         /*
2255                          * Rate scaling has already been initialized, send
2256                          * current LQ command
2257                          */
2258                         if (send_lq)
2259                                 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2260                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2261                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2262                 }
2263         }
2264
2265         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2266         if (!found)
2267                 D_INFO("Restoring all known stations"
2268                        " .... no stations to be restored.\n");
2269         else
2270                 D_INFO("Restoring all known stations" " .... complete.\n");
2271 }
2272 EXPORT_SYMBOL(il_restore_stations);
2273
2274 int
2275 il_get_free_ucode_key_idx(struct il_priv *il)
2276 {
2277         int i;
2278
2279         for (i = 0; i < il->sta_key_max_num; i++)
2280                 if (!test_and_set_bit(i, &il->ucode_key_table))
2281                         return i;
2282
2283         return WEP_INVALID_OFFSET;
2284 }
2285 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2286
2287 void
2288 il_dealloc_bcast_stations(struct il_priv *il)
2289 {
2290         unsigned long flags;
2291         int i;
2292
2293         spin_lock_irqsave(&il->sta_lock, flags);
2294         for (i = 0; i < il->hw_params.max_stations; i++) {
2295                 if (!(il->stations[i].used & IL_STA_BCAST))
2296                         continue;
2297
2298                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2299                 il->num_stations--;
2300                 BUG_ON(il->num_stations < 0);
2301                 kfree(il->stations[i].lq);
2302                 il->stations[i].lq = NULL;
2303         }
2304         spin_unlock_irqrestore(&il->sta_lock, flags);
2305 }
2306 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2307
2308 #ifdef CONFIG_IWLEGACY_DEBUG
2309 static void
2310 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2311 {
2312         int i;
2313         D_RATE("lq station id 0x%x\n", lq->sta_id);
2314         D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2315                lq->general_params.dual_stream_ant_msk);
2316
2317         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2318                 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2319 }
2320 #else
2321 static inline void
2322 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2323 {
2324 }
2325 #endif
2326
2327 /**
2328  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2329  *
2330  * It sometimes happens when a HT rate has been in use and we
2331  * loose connectivity with AP then mac80211 will first tell us that the
2332  * current channel is not HT anymore before removing the station. In such a
2333  * scenario the RXON flags will be updated to indicate we are not
2334  * communicating HT anymore, but the LQ command may still contain HT rates.
2335  * Test for this to prevent driver from sending LQ command between the time
2336  * RXON flags are updated and when LQ command is updated.
2337  */
2338 static bool
2339 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2340 {
2341         int i;
2342
2343         if (il->ht.enabled)
2344                 return true;
2345
2346         D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2347         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2348                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2349                         D_INFO("idx %d of LQ expects HT channel\n", i);
2350                         return false;
2351                 }
2352         }
2353         return true;
2354 }
2355
2356 /**
2357  * il_send_lq_cmd() - Send link quality command
2358  * @init: This command is sent as part of station initialization right
2359  *        after station has been added.
2360  *
2361  * The link quality command is sent as the last step of station creation.
2362  * This is the special case in which init is set and we call a callback in
2363  * this case to clear the state indicating that station creation is in
2364  * progress.
2365  */
2366 int
2367 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2368                u8 flags, bool init)
2369 {
2370         int ret = 0;
2371         unsigned long flags_spin;
2372
2373         struct il_host_cmd cmd = {
2374                 .id = C_TX_LINK_QUALITY_CMD,
2375                 .len = sizeof(struct il_link_quality_cmd),
2376                 .flags = flags,
2377                 .data = lq,
2378         };
2379
2380         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2381                 return -EINVAL;
2382
2383         spin_lock_irqsave(&il->sta_lock, flags_spin);
2384         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2385                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2386                 return -EINVAL;
2387         }
2388         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2389
2390         il_dump_lq_cmd(il, lq);
2391         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2392
2393         if (il_is_lq_table_valid(il, lq))
2394                 ret = il_send_cmd(il, &cmd);
2395         else
2396                 ret = -EINVAL;
2397
2398         if (cmd.flags & CMD_ASYNC)
2399                 return ret;
2400
2401         if (init) {
2402                 D_INFO("init LQ command complete,"
2403                        " clearing sta addition status for sta %d\n",
2404                        lq->sta_id);
2405                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2406                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2407                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2408         }
2409         return ret;
2410 }
2411 EXPORT_SYMBOL(il_send_lq_cmd);
2412
2413 int
2414 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2415                   struct ieee80211_sta *sta)
2416 {
2417         struct il_priv *il = hw->priv;
2418         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2419         int ret;
2420
2421         D_INFO("received request to remove station %pM\n", sta->addr);
2422         mutex_lock(&il->mutex);
2423         D_INFO("proceeding to remove station %pM\n", sta->addr);
2424         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2425         if (ret)
2426                 IL_ERR("Error removing station %pM\n", sta->addr);
2427         mutex_unlock(&il->mutex);
2428         return ret;
2429 }
2430 EXPORT_SYMBOL(il_mac_sta_remove);
2431
2432 /************************** RX-FUNCTIONS ****************************/
2433 /*
2434  * Rx theory of operation
2435  *
2436  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2437  * each of which point to Receive Buffers to be filled by the NIC.  These get
2438  * used not only for Rx frames, but for any command response or notification
2439  * from the NIC.  The driver and NIC manage the Rx buffers by means
2440  * of idxes into the circular buffer.
2441  *
2442  * Rx Queue Indexes
2443  * The host/firmware share two idx registers for managing the Rx buffers.
2444  *
2445  * The READ idx maps to the first position that the firmware may be writing
2446  * to -- the driver can read up to (but not including) this position and get
2447  * good data.
2448  * The READ idx is managed by the firmware once the card is enabled.
2449  *
2450  * The WRITE idx maps to the last position the driver has read from -- the
2451  * position preceding WRITE is the last slot the firmware can place a packet.
2452  *
2453  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2454  * WRITE = READ.
2455  *
2456  * During initialization, the host sets up the READ queue position to the first
2457  * IDX position, and WRITE to the last (READ - 1 wrapped)
2458  *
2459  * When the firmware places a packet in a buffer, it will advance the READ idx
2460  * and fire the RX interrupt.  The driver can then query the READ idx and
2461  * process as many packets as possible, moving the WRITE idx forward as it
2462  * resets the Rx queue buffers with new memory.
2463  *
2464  * The management in the driver is as follows:
2465  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2466  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2467  *   to replenish the iwl->rxq->rx_free.
2468  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2469  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2470  *   'processed' and 'read' driver idxes as well)
2471  * + A received packet is processed and handed to the kernel network stack,
2472  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2473  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2474  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2475  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2476  *   were enough free buffers and RX_STALLED is set it is cleared.
2477  *
2478  *
2479  * Driver sequence:
2480  *
2481  * il_rx_queue_alloc()   Allocates rx_free
2482  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2483  *                            il_rx_queue_restock
2484  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2485  *                            queue, updates firmware pointers, and updates
2486  *                            the WRITE idx.  If insufficient rx_free buffers
2487  *                            are available, schedules il_rx_replenish
2488  *
2489  * -- enable interrupts --
2490  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2491  *                            READ IDX, detaching the SKB from the pool.
2492  *                            Moves the packet buffer from queue to rx_used.
2493  *                            Calls il_rx_queue_restock to refill any empty
2494  *                            slots.
2495  * ...
2496  *
2497  */
2498
2499 /**
2500  * il_rx_queue_space - Return number of free slots available in queue.
2501  */
2502 int
2503 il_rx_queue_space(const struct il_rx_queue *q)
2504 {
2505         int s = q->read - q->write;
2506         if (s <= 0)
2507                 s += RX_QUEUE_SIZE;
2508         /* keep some buffer to not confuse full and empty queue */
2509         s -= 2;
2510         if (s < 0)
2511                 s = 0;
2512         return s;
2513 }
2514 EXPORT_SYMBOL(il_rx_queue_space);
2515
2516 /**
2517  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2518  */
2519 void
2520 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2521 {
2522         unsigned long flags;
2523         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2524         u32 reg;
2525
2526         spin_lock_irqsave(&q->lock, flags);
2527
2528         if (q->need_update == 0)
2529                 goto exit_unlock;
2530
2531         /* If power-saving is in use, make sure device is awake */
2532         if (test_bit(S_POWER_PMI, &il->status)) {
2533                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2534
2535                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2536                         D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2537                                reg);
2538                         il_set_bit(il, CSR_GP_CNTRL,
2539                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2540                         goto exit_unlock;
2541                 }
2542
2543                 q->write_actual = (q->write & ~0x7);
2544                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2545
2546                 /* Else device is assumed to be awake */
2547         } else {
2548                 /* Device expects a multiple of 8 */
2549                 q->write_actual = (q->write & ~0x7);
2550                 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2551         }
2552
2553         q->need_update = 0;
2554
2555 exit_unlock:
2556         spin_unlock_irqrestore(&q->lock, flags);
2557 }
2558 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2559
2560 int
2561 il_rx_queue_alloc(struct il_priv *il)
2562 {
2563         struct il_rx_queue *rxq = &il->rxq;
2564         struct device *dev = &il->pci_dev->dev;
2565         int i;
2566
2567         spin_lock_init(&rxq->lock);
2568         INIT_LIST_HEAD(&rxq->rx_free);
2569         INIT_LIST_HEAD(&rxq->rx_used);
2570
2571         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2572         rxq->bd =
2573             dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2574                                GFP_KERNEL);
2575         if (!rxq->bd)
2576                 goto err_bd;
2577
2578         rxq->rb_stts =
2579             dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2580                                &rxq->rb_stts_dma, GFP_KERNEL);
2581         if (!rxq->rb_stts)
2582                 goto err_rb;
2583
2584         /* Fill the rx_used queue with _all_ of the Rx buffers */
2585         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2586                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2587
2588         /* Set us so that we have processed and used all buffers, but have
2589          * not restocked the Rx queue with fresh buffers */
2590         rxq->read = rxq->write = 0;
2591         rxq->write_actual = 0;
2592         rxq->free_count = 0;
2593         rxq->need_update = 0;
2594         return 0;
2595
2596 err_rb:
2597         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2598                           rxq->bd_dma);
2599 err_bd:
2600         return -ENOMEM;
2601 }
2602 EXPORT_SYMBOL(il_rx_queue_alloc);
2603
2604 void
2605 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2606 {
2607         struct il_rx_pkt *pkt = rxb_addr(rxb);
2608         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2609
2610         if (!report->state) {
2611                 D_11H("Spectrum Measure Notification: Start\n");
2612                 return;
2613         }
2614
2615         memcpy(&il->measure_report, report, sizeof(*report));
2616         il->measurement_status |= MEASUREMENT_READY;
2617 }
2618 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2619
2620 /*
2621  * returns non-zero if packet should be dropped
2622  */
2623 int
2624 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2625                       u32 decrypt_res, struct ieee80211_rx_status *stats)
2626 {
2627         u16 fc = le16_to_cpu(hdr->frame_control);
2628
2629         /*
2630          * All contexts have the same setting here due to it being
2631          * a module parameter, so OK to check any context.
2632          */
2633         if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2634                 return 0;
2635
2636         if (!(fc & IEEE80211_FCTL_PROTECTED))
2637                 return 0;
2638
2639         D_RX("decrypt_res:0x%x\n", decrypt_res);
2640         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2641         case RX_RES_STATUS_SEC_TYPE_TKIP:
2642                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2643                  * Decryption will be done in SW. */
2644                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2645                     RX_RES_STATUS_BAD_KEY_TTAK)
2646                         break;
2647
2648         case RX_RES_STATUS_SEC_TYPE_WEP:
2649                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2650                     RX_RES_STATUS_BAD_ICV_MIC) {
2651                         /* bad ICV, the packet is destroyed since the
2652                          * decryption is inplace, drop it */
2653                         D_RX("Packet destroyed\n");
2654                         return -1;
2655                 }
2656         case RX_RES_STATUS_SEC_TYPE_CCMP:
2657                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2658                     RX_RES_STATUS_DECRYPT_OK) {
2659                         D_RX("hw decrypt successfully!!!\n");
2660                         stats->flag |= RX_FLAG_DECRYPTED;
2661                 }
2662                 break;
2663
2664         default:
2665                 break;
2666         }
2667         return 0;
2668 }
2669 EXPORT_SYMBOL(il_set_decrypted_flag);
2670
2671 /**
2672  * il_txq_update_write_ptr - Send new write idx to hardware
2673  */
2674 void
2675 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2676 {
2677         u32 reg = 0;
2678         int txq_id = txq->q.id;
2679
2680         if (txq->need_update == 0)
2681                 return;
2682
2683         /* if we're trying to save power */
2684         if (test_bit(S_POWER_PMI, &il->status)) {
2685                 /* wake up nic if it's powered down ...
2686                  * uCode will wake up, and interrupt us again, so next
2687                  * time we'll skip this part. */
2688                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2689
2690                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2691                         D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2692                                txq_id, reg);
2693                         il_set_bit(il, CSR_GP_CNTRL,
2694                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2695                         return;
2696                 }
2697
2698                 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2699
2700                 /*
2701                  * else not in power-save mode,
2702                  * uCode will never sleep when we're
2703                  * trying to tx (during RFKILL, we're not trying to tx).
2704                  */
2705         } else
2706                 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2707         txq->need_update = 0;
2708 }
2709 EXPORT_SYMBOL(il_txq_update_write_ptr);
2710
2711 /**
2712  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2713  */
2714 void
2715 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2716 {
2717         struct il_tx_queue *txq = &il->txq[txq_id];
2718         struct il_queue *q = &txq->q;
2719
2720         if (q->n_bd == 0)
2721                 return;
2722
2723         while (q->write_ptr != q->read_ptr) {
2724                 il->ops->lib->txq_free_tfd(il, txq);
2725                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2726         }
2727 }
2728 EXPORT_SYMBOL(il_tx_queue_unmap);
2729
2730 /**
2731  * il_tx_queue_free - Deallocate DMA queue.
2732  * @txq: Transmit queue to deallocate.
2733  *
2734  * Empty queue by removing and destroying all BD's.
2735  * Free all buffers.
2736  * 0-fill, but do not free "txq" descriptor structure.
2737  */
2738 void
2739 il_tx_queue_free(struct il_priv *il, int txq_id)
2740 {
2741         struct il_tx_queue *txq = &il->txq[txq_id];
2742         struct device *dev = &il->pci_dev->dev;
2743         int i;
2744
2745         il_tx_queue_unmap(il, txq_id);
2746
2747         /* De-alloc array of command/tx buffers */
2748         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2749                 kfree(txq->cmd[i]);
2750
2751         /* De-alloc circular buffer of TFDs */
2752         if (txq->q.n_bd)
2753                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2754                                   txq->tfds, txq->q.dma_addr);
2755
2756         /* De-alloc array of per-TFD driver data */
2757         kfree(txq->skbs);
2758         txq->skbs = NULL;
2759
2760         /* deallocate arrays */
2761         kfree(txq->cmd);
2762         kfree(txq->meta);
2763         txq->cmd = NULL;
2764         txq->meta = NULL;
2765
2766         /* 0-fill queue descriptor structure */
2767         memset(txq, 0, sizeof(*txq));
2768 }
2769 EXPORT_SYMBOL(il_tx_queue_free);
2770
2771 /**
2772  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2773  */
2774 void
2775 il_cmd_queue_unmap(struct il_priv *il)
2776 {
2777         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2778         struct il_queue *q = &txq->q;
2779         int i;
2780
2781         if (q->n_bd == 0)
2782                 return;
2783
2784         while (q->read_ptr != q->write_ptr) {
2785                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2786
2787                 if (txq->meta[i].flags & CMD_MAPPED) {
2788                         pci_unmap_single(il->pci_dev,
2789                                          dma_unmap_addr(&txq->meta[i], mapping),
2790                                          dma_unmap_len(&txq->meta[i], len),
2791                                          PCI_DMA_BIDIRECTIONAL);
2792                         txq->meta[i].flags = 0;
2793                 }
2794
2795                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2796         }
2797
2798         i = q->n_win;
2799         if (txq->meta[i].flags & CMD_MAPPED) {
2800                 pci_unmap_single(il->pci_dev,
2801                                  dma_unmap_addr(&txq->meta[i], mapping),
2802                                  dma_unmap_len(&txq->meta[i], len),
2803                                  PCI_DMA_BIDIRECTIONAL);
2804                 txq->meta[i].flags = 0;
2805         }
2806 }
2807 EXPORT_SYMBOL(il_cmd_queue_unmap);
2808
2809 /**
2810  * il_cmd_queue_free - Deallocate DMA queue.
2811  * @txq: Transmit queue to deallocate.
2812  *
2813  * Empty queue by removing and destroying all BD's.
2814  * Free all buffers.
2815  * 0-fill, but do not free "txq" descriptor structure.
2816  */
2817 void
2818 il_cmd_queue_free(struct il_priv *il)
2819 {
2820         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2821         struct device *dev = &il->pci_dev->dev;
2822         int i;
2823
2824         il_cmd_queue_unmap(il);
2825
2826         /* De-alloc array of command/tx buffers */
2827         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2828                 kfree(txq->cmd[i]);
2829
2830         /* De-alloc circular buffer of TFDs */
2831         if (txq->q.n_bd)
2832                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2833                                   txq->tfds, txq->q.dma_addr);
2834
2835         /* deallocate arrays */
2836         kfree(txq->cmd);
2837         kfree(txq->meta);
2838         txq->cmd = NULL;
2839         txq->meta = NULL;
2840
2841         /* 0-fill queue descriptor structure */
2842         memset(txq, 0, sizeof(*txq));
2843 }
2844 EXPORT_SYMBOL(il_cmd_queue_free);
2845
2846 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2847  * DMA services
2848  *
2849  * Theory of operation
2850  *
2851  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2852  * of buffer descriptors, each of which points to one or more data buffers for
2853  * the device to read from or fill.  Driver and device exchange status of each
2854  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2855  * entries in each circular buffer, to protect against confusing empty and full
2856  * queue states.
2857  *
2858  * The device reads or writes the data in the queues via the device's several
2859  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2860  *
2861  * For Tx queue, there are low mark and high mark limits. If, after queuing
2862  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2863  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2864  * Tx queue resumed.
2865  *
2866  * See more detailed info in 4965.h.
2867  ***************************************************/
2868
2869 int
2870 il_queue_space(const struct il_queue *q)
2871 {
2872         int s = q->read_ptr - q->write_ptr;
2873
2874         if (q->read_ptr > q->write_ptr)
2875                 s -= q->n_bd;
2876
2877         if (s <= 0)
2878                 s += q->n_win;
2879         /* keep some reserve to not confuse empty and full situations */
2880         s -= 2;
2881         if (s < 0)
2882                 s = 0;
2883         return s;
2884 }
2885 EXPORT_SYMBOL(il_queue_space);
2886
2887
2888 /**
2889  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2890  */
2891 static int
2892 il_queue_init(struct il_priv *il, struct il_queue *q, int count, int slots_num,
2893               u32 id)
2894 {
2895         q->n_bd = count;
2896         q->n_win = slots_num;
2897         q->id = id;
2898
2899         /* count must be power-of-two size, otherwise il_queue_inc_wrap
2900          * and il_queue_dec_wrap are broken. */
2901         BUG_ON(!is_power_of_2(count));
2902
2903         /* slots_num must be power-of-two size, otherwise
2904          * il_get_cmd_idx is broken. */
2905         BUG_ON(!is_power_of_2(slots_num));
2906
2907         q->low_mark = q->n_win / 4;
2908         if (q->low_mark < 4)
2909                 q->low_mark = 4;
2910
2911         q->high_mark = q->n_win / 8;
2912         if (q->high_mark < 2)
2913                 q->high_mark = 2;
2914
2915         q->write_ptr = q->read_ptr = 0;
2916
2917         return 0;
2918 }
2919
2920 /**
2921  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2922  */
2923 static int
2924 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2925 {
2926         struct device *dev = &il->pci_dev->dev;
2927         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2928
2929         /* Driver ilate data, only for Tx (not command) queues,
2930          * not shared with device. */
2931         if (id != il->cmd_queue) {
2932                 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(struct skb *),
2933                                     GFP_KERNEL);
2934                 if (!txq->skbs) {
2935                         IL_ERR("Fail to alloc skbs\n");
2936                         goto error;
2937                 }
2938         } else
2939                 txq->skbs = NULL;
2940
2941         /* Circular buffer of transmit frame descriptors (TFDs),
2942          * shared with device */
2943         txq->tfds =
2944             dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2945         if (!txq->tfds) {
2946                 IL_ERR("Fail to alloc TFDs\n");
2947                 goto error;
2948         }
2949         txq->q.id = id;
2950
2951         return 0;
2952
2953 error:
2954         kfree(txq->skbs);
2955         txq->skbs = NULL;
2956
2957         return -ENOMEM;
2958 }
2959
2960 /**
2961  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2962  */
2963 int
2964 il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
2965                  u32 txq_id)
2966 {
2967         int i, len;
2968         int ret;
2969         int actual_slots = slots_num;
2970
2971         /*
2972          * Alloc buffer array for commands (Tx or other types of commands).
2973          * For the command queue (#4/#9), allocate command space + one big
2974          * command for scan, since scan command is very huge; the system will
2975          * not have two scans at the same time, so only one is needed.
2976          * For normal Tx queues (all other queues), no super-size command
2977          * space is needed.
2978          */
2979         if (txq_id == il->cmd_queue)
2980                 actual_slots++;
2981
2982         txq->meta =
2983             kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
2984         txq->cmd =
2985             kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
2986
2987         if (!txq->meta || !txq->cmd)
2988                 goto out_free_arrays;
2989
2990         len = sizeof(struct il_device_cmd);
2991         for (i = 0; i < actual_slots; i++) {
2992                 /* only happens for cmd queue */
2993                 if (i == slots_num)
2994                         len = IL_MAX_CMD_SIZE;
2995
2996                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
2997                 if (!txq->cmd[i])
2998                         goto err;
2999         }
3000
3001         /* Alloc driver data array and TFD circular buffer */
3002         ret = il_tx_queue_alloc(il, txq, txq_id);
3003         if (ret)
3004                 goto err;
3005
3006         txq->need_update = 0;
3007
3008         /*
3009          * For the default queues 0-3, set up the swq_id
3010          * already -- all others need to get one later
3011          * (if they need one at all).
3012          */
3013         if (txq_id < 4)
3014                 il_set_swq_id(txq, txq_id, txq_id);
3015
3016         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
3017          * il_queue_inc_wrap and il_queue_dec_wrap are broken. */
3018         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
3019
3020         /* Initialize queue's high/low-water marks, and head/tail idxes */
3021         il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
3022
3023         /* Tell device where to find queue */
3024         il->ops->lib->txq_init(il, txq);
3025
3026         return 0;
3027 err:
3028         for (i = 0; i < actual_slots; i++)
3029                 kfree(txq->cmd[i]);
3030 out_free_arrays:
3031         kfree(txq->meta);
3032         kfree(txq->cmd);
3033
3034         return -ENOMEM;
3035 }
3036 EXPORT_SYMBOL(il_tx_queue_init);
3037
3038 void
3039 il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
3040                   u32 txq_id)
3041 {
3042         int actual_slots = slots_num;
3043
3044         if (txq_id == il->cmd_queue)
3045                 actual_slots++;
3046
3047         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3048
3049         txq->need_update = 0;
3050
3051         /* Initialize queue's high/low-water marks, and head/tail idxes */
3052         il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
3053
3054         /* Tell device where to find queue */
3055         il->ops->lib->txq_init(il, txq);
3056 }
3057 EXPORT_SYMBOL(il_tx_queue_reset);
3058
3059 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3060
3061 /**
3062  * il_enqueue_hcmd - enqueue a uCode command
3063  * @il: device ilate data point
3064  * @cmd: a point to the ucode command structure
3065  *
3066  * The function returns < 0 values to indicate the operation is
3067  * failed. On success, it turns the idx (> 0) of command in the
3068  * command queue.
3069  */
3070 int
3071 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3072 {
3073         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3074         struct il_queue *q = &txq->q;
3075         struct il_device_cmd *out_cmd;
3076         struct il_cmd_meta *out_meta;
3077         dma_addr_t phys_addr;
3078         unsigned long flags;
3079         int len;
3080         u32 idx;
3081         u16 fix_size;
3082
3083         cmd->len = il->ops->utils->get_hcmd_size(cmd->id, cmd->len);
3084         fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3085
3086         /* If any of the command structures end up being larger than
3087          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3088          * we will need to increase the size of the TFD entries
3089          * Also, check to see if command buffer should not exceed the size
3090          * of device_cmd and max_cmd_size. */
3091         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3092                !(cmd->flags & CMD_SIZE_HUGE));
3093         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3094
3095         if (il_is_rfkill(il) || il_is_ctkill(il)) {
3096                 IL_WARN("Not sending command - %s KILL\n",
3097                         il_is_rfkill(il) ? "RF" : "CT");
3098                 return -EIO;
3099         }
3100
3101         spin_lock_irqsave(&il->hcmd_lock, flags);
3102
3103         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3104                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3105
3106                 IL_ERR("Restarting adapter due to command queue full\n");
3107                 queue_work(il->workqueue, &il->restart);
3108                 return -ENOSPC;
3109         }
3110
3111         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3112         out_cmd = txq->cmd[idx];
3113         out_meta = &txq->meta[idx];
3114
3115         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3116                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3117                 return -ENOSPC;
3118         }
3119
3120         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3121         out_meta->flags = cmd->flags | CMD_MAPPED;
3122         if (cmd->flags & CMD_WANT_SKB)
3123                 out_meta->source = cmd;
3124         if (cmd->flags & CMD_ASYNC)
3125                 out_meta->callback = cmd->callback;
3126
3127         out_cmd->hdr.cmd = cmd->id;
3128         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3129
3130         /* At this point, the out_cmd now has all of the incoming cmd
3131          * information */
3132
3133         out_cmd->hdr.flags = 0;
3134         out_cmd->hdr.sequence =
3135             cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3136         if (cmd->flags & CMD_SIZE_HUGE)
3137                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3138         len = sizeof(struct il_device_cmd);
3139         if (idx == TFD_CMD_SLOTS)
3140                 len = IL_MAX_CMD_SIZE;
3141
3142 #ifdef CONFIG_IWLEGACY_DEBUG
3143         switch (out_cmd->hdr.cmd) {
3144         case C_TX_LINK_QUALITY_CMD:
3145         case C_SENSITIVITY:
3146                 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3147                           "%d bytes at %d[%d]:%d\n",
3148                           il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3149                           le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3150                           q->write_ptr, idx, il->cmd_queue);
3151                 break;
3152         default:
3153                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3154                      "%d bytes at %d[%d]:%d\n",
3155                      il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3156                      le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3157                      idx, il->cmd_queue);
3158         }
3159 #endif
3160         txq->need_update = 1;
3161
3162         if (il->ops->lib->txq_update_byte_cnt_tbl)
3163                 /* Set up entry in queue's byte count circular buffer */
3164                 il->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0);
3165
3166         phys_addr =
3167             pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3168                            PCI_DMA_BIDIRECTIONAL);
3169         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3170         dma_unmap_len_set(out_meta, len, fix_size);
3171
3172         il->ops->lib->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3173                                             U32_PAD(cmd->len));
3174
3175         /* Increment and update queue's write idx */
3176         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3177         il_txq_update_write_ptr(il, txq);
3178
3179         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3180         return idx;
3181 }
3182
3183 /**
3184  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3185  *
3186  * When FW advances 'R' idx, all entries between old and new 'R' idx
3187  * need to be reclaimed. As result, some free space forms.  If there is
3188  * enough free space (> low mark), wake the stack that feeds us.
3189  */
3190 static void
3191 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3192 {
3193         struct il_tx_queue *txq = &il->txq[txq_id];
3194         struct il_queue *q = &txq->q;
3195         int nfreed = 0;
3196
3197         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3198                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3199                        "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3200                        q->write_ptr, q->read_ptr);
3201                 return;
3202         }
3203
3204         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3205              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3206
3207                 if (nfreed++ > 0) {
3208                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3209                                q->write_ptr, q->read_ptr);
3210                         queue_work(il->workqueue, &il->restart);
3211                 }
3212
3213         }
3214 }
3215
3216 /**
3217  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3218  * @rxb: Rx buffer to reclaim
3219  *
3220  * If an Rx buffer has an async callback associated with it the callback
3221  * will be executed.  The attached skb (if present) will only be freed
3222  * if the callback returns 1
3223  */
3224 void
3225 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3226 {
3227         struct il_rx_pkt *pkt = rxb_addr(rxb);
3228         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3229         int txq_id = SEQ_TO_QUEUE(sequence);
3230         int idx = SEQ_TO_IDX(sequence);
3231         int cmd_idx;
3232         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3233         struct il_device_cmd *cmd;
3234         struct il_cmd_meta *meta;
3235         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3236         unsigned long flags;
3237
3238         /* If a Tx command is being handled and it isn't in the actual
3239          * command queue then there a command routing bug has been introduced
3240          * in the queue management code. */
3241         if (WARN
3242             (txq_id != il->cmd_queue,
3243              "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3244              txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3245              il->txq[il->cmd_queue].q.write_ptr)) {
3246                 il_print_hex_error(il, pkt, 32);
3247                 return;
3248         }
3249
3250         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3251         cmd = txq->cmd[cmd_idx];
3252         meta = &txq->meta[cmd_idx];
3253
3254         txq->time_stamp = jiffies;
3255
3256         pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3257                          dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3258
3259         /* Input error checking is done when commands are added to queue. */
3260         if (meta->flags & CMD_WANT_SKB) {
3261                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3262                 rxb->page = NULL;
3263         } else if (meta->callback)
3264                 meta->callback(il, cmd, pkt);
3265
3266         spin_lock_irqsave(&il->hcmd_lock, flags);
3267
3268         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3269
3270         if (!(meta->flags & CMD_ASYNC)) {
3271                 clear_bit(S_HCMD_ACTIVE, &il->status);
3272                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3273                        il_get_cmd_string(cmd->hdr.cmd));
3274                 wake_up(&il->wait_command_queue);
3275         }
3276
3277         /* Mark as unmapped */
3278         meta->flags = 0;
3279
3280         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3281 }
3282 EXPORT_SYMBOL(il_tx_cmd_complete);
3283
3284 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3285 MODULE_VERSION(IWLWIFI_VERSION);
3286 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3287 MODULE_LICENSE("GPL");
3288
3289 /*
3290  * set bt_coex_active to true, uCode will do kill/defer
3291  * every time the priority line is asserted (BT is sending signals on the
3292  * priority line in the PCIx).
3293  * set bt_coex_active to false, uCode will ignore the BT activity and
3294  * perform the normal operation
3295  *
3296  * User might experience transmit issue on some platform due to WiFi/BT
3297  * co-exist problem. The possible behaviors are:
3298  *   Able to scan and finding all the available AP
3299  *   Not able to associate with any AP
3300  * On those platforms, WiFi communication can be restored by set
3301  * "bt_coex_active" module parameter to "false"
3302  *
3303  * default: bt_coex_active = true (BT_COEX_ENABLE)
3304  */
3305 static bool bt_coex_active = true;
3306 module_param(bt_coex_active, bool, S_IRUGO);
3307 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3308
3309 u32 il_debug_level;
3310 EXPORT_SYMBOL(il_debug_level);
3311
3312 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3313 EXPORT_SYMBOL(il_bcast_addr);
3314
3315 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3316 #define MAX_BIT_RATE_20_MHZ 72  /* Mbps */
3317 static void
3318 il_init_ht_hw_capab(const struct il_priv *il,
3319                     struct ieee80211_sta_ht_cap *ht_info,
3320                     enum ieee80211_band band)
3321 {
3322         u16 max_bit_rate = 0;
3323         u8 rx_chains_num = il->hw_params.rx_chains_num;
3324         u8 tx_chains_num = il->hw_params.tx_chains_num;
3325
3326         ht_info->cap = 0;
3327         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3328
3329         ht_info->ht_supported = true;
3330
3331         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3332         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3333         if (il->hw_params.ht40_channel & BIT(band)) {
3334                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3335                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3336                 ht_info->mcs.rx_mask[4] = 0x01;
3337                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3338         }
3339
3340         if (il->cfg->mod_params->amsdu_size_8K)
3341                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3342
3343         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3344         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3345
3346         ht_info->mcs.rx_mask[0] = 0xFF;
3347         if (rx_chains_num >= 2)
3348                 ht_info->mcs.rx_mask[1] = 0xFF;
3349         if (rx_chains_num >= 3)
3350                 ht_info->mcs.rx_mask[2] = 0xFF;
3351
3352         /* Highest supported Rx data rate */
3353         max_bit_rate *= rx_chains_num;
3354         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3355         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3356
3357         /* Tx MCS capabilities */
3358         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3359         if (tx_chains_num != rx_chains_num) {
3360                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3361                 ht_info->mcs.tx_params |=
3362                     ((tx_chains_num -
3363                       1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3364         }
3365 }
3366
3367 /**
3368  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3369  */
3370 int
3371 il_init_geos(struct il_priv *il)
3372 {
3373         struct il_channel_info *ch;
3374         struct ieee80211_supported_band *sband;
3375         struct ieee80211_channel *channels;
3376         struct ieee80211_channel *geo_ch;
3377         struct ieee80211_rate *rates;
3378         int i = 0;
3379         s8 max_tx_power = 0;
3380
3381         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3382             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3383                 D_INFO("Geography modes already initialized.\n");
3384                 set_bit(S_GEO_CONFIGURED, &il->status);
3385                 return 0;
3386         }
3387
3388         channels =
3389             kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3390                     GFP_KERNEL);
3391         if (!channels)
3392                 return -ENOMEM;
3393
3394         rates =
3395             kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3396                     GFP_KERNEL);
3397         if (!rates) {
3398                 kfree(channels);
3399                 return -ENOMEM;
3400         }
3401
3402         /* 5.2GHz channels start after the 2.4GHz channels */
3403         sband = &il->bands[IEEE80211_BAND_5GHZ];
3404         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3405         /* just OFDM */
3406         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3407         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3408
3409         if (il->cfg->sku & IL_SKU_N)
3410                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ);
3411
3412         sband = &il->bands[IEEE80211_BAND_2GHZ];
3413         sband->channels = channels;
3414         /* OFDM & CCK */
3415         sband->bitrates = rates;
3416         sband->n_bitrates = RATE_COUNT_LEGACY;
3417
3418         if (il->cfg->sku & IL_SKU_N)
3419                 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ);
3420
3421         il->ieee_channels = channels;
3422         il->ieee_rates = rates;
3423
3424         for (i = 0; i < il->channel_count; i++) {
3425                 ch = &il->channel_info[i];
3426
3427                 if (!il_is_channel_valid(ch))
3428                         continue;
3429
3430                 sband = &il->bands[ch->band];
3431
3432                 geo_ch = &sband->channels[sband->n_channels++];
3433
3434                 geo_ch->center_freq =
3435                     ieee80211_channel_to_frequency(ch->channel, ch->band);
3436                 geo_ch->max_power = ch->max_power_avg;
3437                 geo_ch->max_antenna_gain = 0xff;
3438                 geo_ch->hw_value = ch->channel;
3439
3440                 if (il_is_channel_valid(ch)) {
3441                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3442                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3443
3444                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3445                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3446
3447                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3448                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3449
3450                         geo_ch->flags |= ch->ht40_extension_channel;
3451
3452                         if (ch->max_power_avg > max_tx_power)
3453                                 max_tx_power = ch->max_power_avg;
3454                 } else {
3455                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3456                 }
3457
3458                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3459                        geo_ch->center_freq,
3460                        il_is_channel_a_band(ch) ? "5.2" : "2.4",
3461                        geo_ch->
3462                        flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3463                        geo_ch->flags);
3464         }
3465
3466         il->tx_power_device_lmt = max_tx_power;
3467         il->tx_power_user_lmt = max_tx_power;
3468         il->tx_power_next = max_tx_power;
3469
3470         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3471             (il->cfg->sku & IL_SKU_A)) {
3472                 IL_INFO("Incorrectly detected BG card as ABG. "
3473                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3474                         il->pci_dev->device, il->pci_dev->subsystem_device);
3475                 il->cfg->sku &= ~IL_SKU_A;
3476         }
3477
3478         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3479                 il->bands[IEEE80211_BAND_2GHZ].n_channels,
3480                 il->bands[IEEE80211_BAND_5GHZ].n_channels);
3481
3482         set_bit(S_GEO_CONFIGURED, &il->status);
3483
3484         return 0;
3485 }
3486 EXPORT_SYMBOL(il_init_geos);
3487
3488 /*
3489  * il_free_geos - undo allocations in il_init_geos
3490  */
3491 void
3492 il_free_geos(struct il_priv *il)
3493 {
3494         kfree(il->ieee_channels);
3495         kfree(il->ieee_rates);
3496         clear_bit(S_GEO_CONFIGURED, &il->status);
3497 }
3498 EXPORT_SYMBOL(il_free_geos);
3499
3500 static bool
3501 il_is_channel_extension(struct il_priv *il, enum ieee80211_band band,
3502                         u16 channel, u8 extension_chan_offset)
3503 {
3504         const struct il_channel_info *ch_info;
3505
3506         ch_info = il_get_channel_info(il, band, channel);
3507         if (!il_is_channel_valid(ch_info))
3508                 return false;
3509
3510         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3511                 return !(ch_info->
3512                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3513         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3514                 return !(ch_info->
3515                          ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3516
3517         return false;
3518 }
3519
3520 bool
3521 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3522 {
3523         if (!il->ht.enabled || !il->ht.is_40mhz)
3524                 return false;
3525
3526         /*
3527          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3528          * the bit will not set if it is pure 40MHz case
3529          */
3530         if (ht_cap && !ht_cap->ht_supported)
3531                 return false;
3532
3533 #ifdef CONFIG_IWLEGACY_DEBUGFS
3534         if (il->disable_ht40)
3535                 return false;
3536 #endif
3537
3538         return il_is_channel_extension(il, il->band,
3539                                        le16_to_cpu(il->staging.channel),
3540                                        il->ht.extension_chan_offset);
3541 }
3542 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3543
3544 static u16
3545 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3546 {
3547         u16 new_val;
3548         u16 beacon_factor;
3549
3550         /*
3551          * If mac80211 hasn't given us a beacon interval, program
3552          * the default into the device.
3553          */
3554         if (!beacon_val)
3555                 return DEFAULT_BEACON_INTERVAL;
3556
3557         /*
3558          * If the beacon interval we obtained from the peer
3559          * is too large, we'll have to wake up more often
3560          * (and in IBSS case, we'll beacon too much)
3561          *
3562          * For example, if max_beacon_val is 4096, and the
3563          * requested beacon interval is 7000, we'll have to
3564          * use 3500 to be able to wake up on the beacons.
3565          *
3566          * This could badly influence beacon detection stats.
3567          */
3568
3569         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3570         new_val = beacon_val / beacon_factor;
3571
3572         if (!new_val)
3573                 new_val = max_beacon_val;
3574
3575         return new_val;
3576 }
3577
3578 int
3579 il_send_rxon_timing(struct il_priv *il)
3580 {
3581         u64 tsf;
3582         s32 interval_tm, rem;
3583         struct ieee80211_conf *conf = NULL;
3584         u16 beacon_int;
3585         struct ieee80211_vif *vif = il->vif;
3586
3587         conf = &il->hw->conf;
3588
3589         lockdep_assert_held(&il->mutex);
3590
3591         memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3592
3593         il->timing.timestamp = cpu_to_le64(il->timestamp);
3594         il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3595
3596         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3597
3598         /*
3599          * TODO: For IBSS we need to get atim_win from mac80211,
3600          *       for now just always use 0
3601          */
3602         il->timing.atim_win = 0;
3603
3604         beacon_int =
3605             il_adjust_beacon_interval(beacon_int,
3606                                       il->hw_params.max_beacon_itrvl *
3607                                       TIME_UNIT);
3608         il->timing.beacon_interval = cpu_to_le16(beacon_int);
3609
3610         tsf = il->timestamp;    /* tsf is modifed by do_div: copy it */
3611         interval_tm = beacon_int * TIME_UNIT;
3612         rem = do_div(tsf, interval_tm);
3613         il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3614
3615         il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3616
3617         D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3618                 le16_to_cpu(il->timing.beacon_interval),
3619                 le32_to_cpu(il->timing.beacon_init_val),
3620                 le16_to_cpu(il->timing.atim_win));
3621
3622         return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3623                                &il->timing);
3624 }
3625 EXPORT_SYMBOL(il_send_rxon_timing);
3626
3627 void
3628 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3629 {
3630         struct il_rxon_cmd *rxon = &il->staging;
3631
3632         if (hw_decrypt)
3633                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3634         else
3635                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3636
3637 }
3638 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3639
3640 /* validate RXON structure is valid */
3641 int
3642 il_check_rxon_cmd(struct il_priv *il)
3643 {
3644         struct il_rxon_cmd *rxon = &il->staging;
3645         bool error = false;
3646
3647         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3648                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3649                         IL_WARN("check 2.4G: wrong narrow\n");
3650                         error = true;
3651                 }
3652                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3653                         IL_WARN("check 2.4G: wrong radar\n");
3654                         error = true;
3655                 }
3656         } else {
3657                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3658                         IL_WARN("check 5.2G: not short slot!\n");
3659                         error = true;
3660                 }
3661                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3662                         IL_WARN("check 5.2G: CCK!\n");
3663                         error = true;
3664                 }
3665         }
3666         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3667                 IL_WARN("mac/bssid mcast!\n");
3668                 error = true;
3669         }
3670
3671         /* make sure basic rates 6Mbps and 1Mbps are supported */
3672         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3673             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3674                 IL_WARN("neither 1 nor 6 are basic\n");
3675                 error = true;
3676         }
3677
3678         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3679                 IL_WARN("aid > 2007\n");
3680                 error = true;
3681         }
3682
3683         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3684             (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3685                 IL_WARN("CCK and short slot\n");
3686                 error = true;
3687         }
3688
3689         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3690             (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3691                 IL_WARN("CCK and auto detect");
3692                 error = true;
3693         }
3694
3695         if ((rxon->
3696              flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3697             RXON_FLG_TGG_PROTECT_MSK) {
3698                 IL_WARN("TGg but no auto-detect\n");
3699                 error = true;
3700         }
3701
3702         if (error)
3703                 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3704
3705         if (error) {
3706                 IL_ERR("Invalid RXON\n");
3707                 return -EINVAL;
3708         }
3709         return 0;
3710 }
3711 EXPORT_SYMBOL(il_check_rxon_cmd);
3712
3713 /**
3714  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3715  * @il: staging_rxon is compared to active_rxon
3716  *
3717  * If the RXON structure is changing enough to require a new tune,
3718  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3719  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3720  */
3721 int
3722 il_full_rxon_required(struct il_priv *il)
3723 {
3724         const struct il_rxon_cmd *staging = &il->staging;
3725         const struct il_rxon_cmd *active = &il->active;
3726
3727 #define CHK(cond)                                                       \
3728         if ((cond)) {                                                   \
3729                 D_INFO("need full RXON - " #cond "\n"); \
3730                 return 1;                                               \
3731         }
3732
3733 #define CHK_NEQ(c1, c2)                                         \
3734         if ((c1) != (c2)) {                                     \
3735                 D_INFO("need full RXON - "      \
3736                                #c1 " != " #c2 " - %d != %d\n",  \
3737                                (c1), (c2));                     \
3738                 return 1;                                       \
3739         }
3740
3741         /* These items are only settable from the full RXON command */
3742         CHK(!il_is_associated(il));
3743         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
3744         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
3745         CHK(compare_ether_addr
3746             (staging->wlap_bssid_addr, active->wlap_bssid_addr));
3747         CHK_NEQ(staging->dev_type, active->dev_type);
3748         CHK_NEQ(staging->channel, active->channel);
3749         CHK_NEQ(staging->air_propagation, active->air_propagation);
3750         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3751                 active->ofdm_ht_single_stream_basic_rates);
3752         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3753                 active->ofdm_ht_dual_stream_basic_rates);
3754         CHK_NEQ(staging->assoc_id, active->assoc_id);
3755
3756         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3757          * be updated with the RXON_ASSOC command -- however only some
3758          * flag transitions are allowed using RXON_ASSOC */
3759
3760         /* Check if we are not switching bands */
3761         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3762                 active->flags & RXON_FLG_BAND_24G_MSK);
3763
3764         /* Check if we are switching association toggle */
3765         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3766                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3767
3768 #undef CHK
3769 #undef CHK_NEQ
3770
3771         return 0;
3772 }
3773 EXPORT_SYMBOL(il_full_rxon_required);
3774
3775 u8
3776 il_get_lowest_plcp(struct il_priv *il)
3777 {
3778         /*
3779          * Assign the lowest rate -- should really get this from
3780          * the beacon skb from mac80211.
3781          */
3782         if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3783                 return RATE_1M_PLCP;
3784         else
3785                 return RATE_6M_PLCP;
3786 }
3787 EXPORT_SYMBOL(il_get_lowest_plcp);
3788
3789 static void
3790 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3791 {
3792         struct il_rxon_cmd *rxon = &il->staging;
3793
3794         if (!il->ht.enabled) {
3795                 rxon->flags &=
3796                     ~(RXON_FLG_CHANNEL_MODE_MSK |
3797                       RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3798                       | RXON_FLG_HT_PROT_MSK);
3799                 return;
3800         }
3801
3802         rxon->flags |=
3803             cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3804
3805         /* Set up channel bandwidth:
3806          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3807         /* clear the HT channel mode before set the mode */
3808         rxon->flags &=
3809             ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3810         if (il_is_ht40_tx_allowed(il, NULL)) {
3811                 /* pure ht40 */
3812                 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3813                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3814                         /* Note: control channel is opposite of extension channel */
3815                         switch (il->ht.extension_chan_offset) {
3816                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3817                                 rxon->flags &=
3818                                     ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3819                                 break;
3820                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3821                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3822                                 break;
3823                         }
3824                 } else {
3825                         /* Note: control channel is opposite of extension channel */
3826                         switch (il->ht.extension_chan_offset) {
3827                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3828                                 rxon->flags &=
3829                                     ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3830                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3831                                 break;
3832                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3833                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3834                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3835                                 break;
3836                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3837                         default:
3838                                 /* channel location only valid if in Mixed mode */
3839                                 IL_ERR("invalid extension channel offset\n");
3840                                 break;
3841                         }
3842                 }
3843         } else {
3844                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3845         }
3846
3847         if (il->ops->hcmd->set_rxon_chain)
3848                 il->ops->hcmd->set_rxon_chain(il);
3849
3850         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3851                 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3852                 il->ht.protection, il->ht.extension_chan_offset);
3853 }
3854
3855 void
3856 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3857 {
3858         _il_set_rxon_ht(il, ht_conf);
3859 }
3860 EXPORT_SYMBOL(il_set_rxon_ht);
3861
3862 /* Return valid, unused, channel for a passive scan to reset the RF */
3863 u8
3864 il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band)
3865 {
3866         const struct il_channel_info *ch_info;
3867         int i;
3868         u8 channel = 0;
3869         u8 min, max;
3870
3871         if (band == IEEE80211_BAND_5GHZ) {
3872                 min = 14;
3873                 max = il->channel_count;
3874         } else {
3875                 min = 0;
3876                 max = 14;
3877         }
3878
3879         for (i = min; i < max; i++) {
3880                 channel = il->channel_info[i].channel;
3881                 if (channel == le16_to_cpu(il->staging.channel))
3882                         continue;
3883
3884                 ch_info = il_get_channel_info(il, band, channel);
3885                 if (il_is_channel_valid(ch_info))
3886                         break;
3887         }
3888
3889         return channel;
3890 }
3891 EXPORT_SYMBOL(il_get_single_channel_number);
3892
3893 /**
3894  * il_set_rxon_channel - Set the band and channel values in staging RXON
3895  * @ch: requested channel as a pointer to struct ieee80211_channel
3896
3897  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3898  * in the staging RXON flag structure based on the ch->band
3899  */
3900 int
3901 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3902 {
3903         enum ieee80211_band band = ch->band;
3904         u16 channel = ch->hw_value;
3905
3906         if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3907                 return 0;
3908
3909         il->staging.channel = cpu_to_le16(channel);
3910         if (band == IEEE80211_BAND_5GHZ)
3911                 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3912         else
3913                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3914
3915         il->band = band;
3916
3917         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3918
3919         return 0;
3920 }
3921 EXPORT_SYMBOL(il_set_rxon_channel);
3922
3923 void
3924 il_set_flags_for_band(struct il_priv *il, enum ieee80211_band band,
3925                       struct ieee80211_vif *vif)
3926 {
3927         if (band == IEEE80211_BAND_5GHZ) {
3928                 il->staging.flags &=
3929                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3930                       RXON_FLG_CCK_MSK);
3931                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3932         } else {
3933                 /* Copied from il_post_associate() */
3934                 if (vif && vif->bss_conf.use_short_slot)
3935                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3936                 else
3937                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3938
3939                 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3940                 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3941                 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3942         }
3943 }
3944 EXPORT_SYMBOL(il_set_flags_for_band);
3945
3946 /*
3947  * initialize rxon structure with default values from eeprom
3948  */
3949 void
3950 il_connection_init_rx_config(struct il_priv *il)
3951 {
3952         const struct il_channel_info *ch_info;
3953
3954         memset(&il->staging, 0, sizeof(il->staging));
3955
3956         if (!il->vif) {
3957                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
3958         } else if (il->vif->type == NL80211_IFTYPE_STATION) {
3959                 il->staging.dev_type = RXON_DEV_TYPE_ESS;
3960                 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3961         } else if (il->vif->type == NL80211_IFTYPE_ADHOC) {
3962                 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
3963                 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3964                 il->staging.filter_flags =
3965                     RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
3966         } else {
3967                 IL_ERR("Unsupported interface type %d\n", il->vif->type);
3968                 return;
3969         }
3970
3971 #if 0
3972         /* TODO:  Figure out when short_preamble would be set and cache from
3973          * that */
3974         if (!hw_to_local(il->hw)->short_preamble)
3975                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3976         else
3977                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3978 #endif
3979
3980         ch_info =
3981             il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
3982
3983         if (!ch_info)
3984                 ch_info = &il->channel_info[0];
3985
3986         il->staging.channel = cpu_to_le16(ch_info->channel);
3987         il->band = ch_info->band;
3988
3989         il_set_flags_for_band(il, il->band, il->vif);
3990
3991         il->staging.ofdm_basic_rates =
3992             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3993         il->staging.cck_basic_rates =
3994             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3995
3996         /* clear both MIX and PURE40 mode flag */
3997         il->staging.flags &=
3998             ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
3999         if (il->vif)
4000                 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4001
4002         il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4003         il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4004 }
4005 EXPORT_SYMBOL(il_connection_init_rx_config);
4006
4007 void
4008 il_set_rate(struct il_priv *il)
4009 {
4010         const struct ieee80211_supported_band *hw = NULL;
4011         struct ieee80211_rate *rate;
4012         int i;
4013
4014         hw = il_get_hw_mode(il, il->band);
4015         if (!hw) {
4016                 IL_ERR("Failed to set rate: unable to get hw mode\n");
4017                 return;
4018         }
4019
4020         il->active_rate = 0;
4021
4022         for (i = 0; i < hw->n_bitrates; i++) {
4023                 rate = &(hw->bitrates[i]);
4024                 if (rate->hw_value < RATE_COUNT_LEGACY)
4025                         il->active_rate |= (1 << rate->hw_value);
4026         }
4027
4028         D_RATE("Set active_rate = %0x\n", il->active_rate);
4029
4030         il->staging.cck_basic_rates =
4031             (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4032
4033         il->staging.ofdm_basic_rates =
4034             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4035 }
4036 EXPORT_SYMBOL(il_set_rate);
4037
4038 void
4039 il_chswitch_done(struct il_priv *il, bool is_success)
4040 {
4041         if (test_bit(S_EXIT_PENDING, &il->status))
4042                 return;
4043
4044         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4045                 ieee80211_chswitch_done(il->vif, is_success);
4046 }
4047 EXPORT_SYMBOL(il_chswitch_done);
4048
4049 void
4050 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4051 {
4052         struct il_rx_pkt *pkt = rxb_addr(rxb);
4053         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4054         struct il_rxon_cmd *rxon = (void *)&il->active;
4055
4056         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4057                 return;
4058
4059         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4060                 rxon->channel = csa->channel;
4061                 il->staging.channel = csa->channel;
4062                 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4063                 il_chswitch_done(il, true);
4064         } else {
4065                 IL_ERR("CSA notif (fail) : channel %d\n",
4066                        le16_to_cpu(csa->channel));
4067                 il_chswitch_done(il, false);
4068         }
4069 }
4070 EXPORT_SYMBOL(il_hdl_csa);
4071
4072 #ifdef CONFIG_IWLEGACY_DEBUG
4073 void
4074 il_print_rx_config_cmd(struct il_priv *il)
4075 {
4076         struct il_rxon_cmd *rxon = &il->staging;
4077
4078         D_RADIO("RX CONFIG:\n");
4079         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4080         D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4081         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4082         D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4083         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4084         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4085         D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4086         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4087         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4088         D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4089 }
4090 EXPORT_SYMBOL(il_print_rx_config_cmd);
4091 #endif
4092 /**
4093  * il_irq_handle_error - called for HW or SW error interrupt from card
4094  */
4095 void
4096 il_irq_handle_error(struct il_priv *il)
4097 {
4098         /* Set the FW error flag -- cleared on il_down */
4099         set_bit(S_FW_ERROR, &il->status);
4100
4101         /* Cancel currently queued command. */
4102         clear_bit(S_HCMD_ACTIVE, &il->status);
4103
4104         IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4105
4106         il->ops->lib->dump_nic_error_log(il);
4107         if (il->ops->lib->dump_fh)
4108                 il->ops->lib->dump_fh(il, NULL, false);
4109 #ifdef CONFIG_IWLEGACY_DEBUG
4110         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4111                 il_print_rx_config_cmd(il);
4112 #endif
4113
4114         wake_up(&il->wait_command_queue);
4115
4116         /* Keep the restart process from trying to send host
4117          * commands by clearing the INIT status bit */
4118         clear_bit(S_READY, &il->status);
4119
4120         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4121                 IL_DBG(IL_DL_FW_ERRORS,
4122                        "Restarting adapter due to uCode error.\n");
4123
4124                 if (il->cfg->mod_params->restart_fw)
4125                         queue_work(il->workqueue, &il->restart);
4126         }
4127 }
4128 EXPORT_SYMBOL(il_irq_handle_error);
4129
4130 static int
4131 il_apm_stop_master(struct il_priv *il)
4132 {
4133         int ret = 0;
4134
4135         /* stop device's busmaster DMA activity */
4136         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4137
4138         ret =
4139             _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4140                          CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4141         if (ret)
4142                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4143
4144         D_INFO("stop master\n");
4145
4146         return ret;
4147 }
4148
4149 void
4150 il_apm_stop(struct il_priv *il)
4151 {
4152         D_INFO("Stop card, put in low power state\n");
4153
4154         /* Stop device's DMA activity */
4155         il_apm_stop_master(il);
4156
4157         /* Reset the entire device */
4158         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4159
4160         udelay(10);
4161
4162         /*
4163          * Clear "initialization complete" bit to move adapter from
4164          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4165          */
4166         il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4167 }
4168 EXPORT_SYMBOL(il_apm_stop);
4169
4170 /*
4171  * Start up NIC's basic functionality after it has been reset
4172  * (e.g. after platform boot, or shutdown via il_apm_stop())
4173  * NOTE:  This does not load uCode nor start the embedded processor
4174  */
4175 int
4176 il_apm_init(struct il_priv *il)
4177 {
4178         int ret = 0;
4179         u16 lctl;
4180
4181         D_INFO("Init card's basic functions\n");
4182
4183         /*
4184          * Use "set_bit" below rather than "write", to preserve any hardware
4185          * bits already set by default after reset.
4186          */
4187
4188         /* Disable L0S exit timer (platform NMI Work/Around) */
4189         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4190                    CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4191
4192         /*
4193          * Disable L0s without affecting L1;
4194          *  don't wait for ICH L0s (ICH bug W/A)
4195          */
4196         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4197                    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4198
4199         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4200         il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4201
4202         /*
4203          * Enable HAP INTA (interrupt from management bus) to
4204          * wake device's PCI Express link L1a -> L0s
4205          * NOTE:  This is no-op for 3945 (non-existent bit)
4206          */
4207         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4208                    CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4209
4210         /*
4211          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4212          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4213          * If so (likely), disable L0S, so device moves directly L0->L1;
4214          *    costs negligible amount of power savings.
4215          * If not (unlikely), enable L0S, so there is at least some
4216          *    power savings, even without L1.
4217          */
4218         if (il->cfg->set_l0s) {
4219                 lctl = il_pcie_link_ctl(il);
4220                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4221                     PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4222                         /* L1-ASPM enabled; disable(!) L0S  */
4223                         il_set_bit(il, CSR_GIO_REG,
4224                                    CSR_GIO_REG_VAL_L0S_ENABLED);
4225                         D_POWER("L1 Enabled; Disabling L0S\n");
4226                 } else {
4227                         /* L1-ASPM disabled; enable(!) L0S */
4228                         il_clear_bit(il, CSR_GIO_REG,
4229                                      CSR_GIO_REG_VAL_L0S_ENABLED);
4230                         D_POWER("L1 Disabled; Enabling L0S\n");
4231                 }
4232         }
4233
4234         /* Configure analog phase-lock-loop before activating to D0A */
4235         if (il->cfg->pll_cfg_val)
4236                 il_set_bit(il, CSR_ANA_PLL_CFG,
4237                            il->cfg->pll_cfg_val);
4238
4239         /*
4240          * Set "initialization complete" bit to move adapter from
4241          * D0U* --> D0A* (powered-up active) state.
4242          */
4243         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4244
4245         /*
4246          * Wait for clock stabilization; once stabilized, access to
4247          * device-internal resources is supported, e.g. il_wr_prph()
4248          * and accesses to uCode SRAM.
4249          */
4250         ret =
4251             _il_poll_bit(il, CSR_GP_CNTRL,
4252                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4253                          CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4254         if (ret < 0) {
4255                 D_INFO("Failed to init the card\n");
4256                 goto out;
4257         }
4258
4259         /*
4260          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4261          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4262          *
4263          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4264          * do not disable clocks.  This preserves any hardware bits already
4265          * set by default in "CLK_CTRL_REG" after reset.
4266          */
4267         if (il->cfg->use_bsm)
4268                 il_wr_prph(il, APMG_CLK_EN_REG,
4269                            APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4270         else
4271                 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4272         udelay(20);
4273
4274         /* Disable L1-Active */
4275         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4276                          APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4277
4278 out:
4279         return ret;
4280 }
4281 EXPORT_SYMBOL(il_apm_init);
4282
4283 int
4284 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4285 {
4286         int ret;
4287         s8 prev_tx_power;
4288         bool defer;
4289
4290         lockdep_assert_held(&il->mutex);
4291
4292         if (il->tx_power_user_lmt == tx_power && !force)
4293                 return 0;
4294
4295         if (!il->ops->lib->send_tx_power)
4296                 return -EOPNOTSUPP;
4297
4298         /* 0 dBm mean 1 milliwatt */
4299         if (tx_power < 0) {
4300                 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4301                 return -EINVAL;
4302         }
4303
4304         if (tx_power > il->tx_power_device_lmt) {
4305                 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4306                         tx_power, il->tx_power_device_lmt);
4307                 return -EINVAL;
4308         }
4309
4310         if (!il_is_ready_rf(il))
4311                 return -EIO;
4312
4313         /* scan complete and commit_rxon use tx_power_next value,
4314          * it always need to be updated for newest request */
4315         il->tx_power_next = tx_power;
4316
4317         /* do not set tx power when scanning or channel changing */
4318         defer = test_bit(S_SCANNING, &il->status) ||
4319             memcmp(&il->active, &il->staging, sizeof(il->staging));
4320         if (defer && !force) {
4321                 D_INFO("Deferring tx power set\n");
4322                 return 0;
4323         }
4324
4325         prev_tx_power = il->tx_power_user_lmt;
4326         il->tx_power_user_lmt = tx_power;
4327
4328         ret = il->ops->lib->send_tx_power(il);
4329
4330         /* if fail to set tx_power, restore the orig. tx power */
4331         if (ret) {
4332                 il->tx_power_user_lmt = prev_tx_power;
4333                 il->tx_power_next = prev_tx_power;
4334         }
4335         return ret;
4336 }
4337 EXPORT_SYMBOL(il_set_tx_power);
4338
4339 void
4340 il_send_bt_config(struct il_priv *il)
4341 {
4342         struct il_bt_cmd bt_cmd = {
4343                 .lead_time = BT_LEAD_TIME_DEF,
4344                 .max_kill = BT_MAX_KILL_DEF,
4345                 .kill_ack_mask = 0,
4346                 .kill_cts_mask = 0,
4347         };
4348
4349         if (!bt_coex_active)
4350                 bt_cmd.flags = BT_COEX_DISABLE;
4351         else
4352                 bt_cmd.flags = BT_COEX_ENABLE;
4353
4354         D_INFO("BT coex %s\n",
4355                (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4356
4357         if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4358                 IL_ERR("failed to send BT Coex Config\n");
4359 }
4360 EXPORT_SYMBOL(il_send_bt_config);
4361
4362 int
4363 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4364 {
4365         struct il_stats_cmd stats_cmd = {
4366                 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4367         };
4368
4369         if (flags & CMD_ASYNC)
4370                 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4371                                              &stats_cmd, NULL);
4372         else
4373                 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4374                                        &stats_cmd);
4375 }
4376 EXPORT_SYMBOL(il_send_stats_request);
4377
4378 void
4379 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4380 {
4381 #ifdef CONFIG_IWLEGACY_DEBUG
4382         struct il_rx_pkt *pkt = rxb_addr(rxb);
4383         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4384         D_RX("sleep mode: %d, src: %d\n",
4385              sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4386 #endif
4387 }
4388 EXPORT_SYMBOL(il_hdl_pm_sleep);
4389
4390 void
4391 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4392 {
4393         struct il_rx_pkt *pkt = rxb_addr(rxb);
4394         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4395         D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4396                 il_get_cmd_string(pkt->hdr.cmd));
4397         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4398 }
4399 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4400
4401 void
4402 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4403 {
4404         struct il_rx_pkt *pkt = rxb_addr(rxb);
4405
4406         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4407                "seq 0x%04X ser 0x%08X\n",
4408                le32_to_cpu(pkt->u.err_resp.error_type),
4409                il_get_cmd_string(pkt->u.err_resp.cmd_id),
4410                pkt->u.err_resp.cmd_id,
4411                le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4412                le32_to_cpu(pkt->u.err_resp.error_info));
4413 }
4414 EXPORT_SYMBOL(il_hdl_error);
4415
4416 void
4417 il_clear_isr_stats(struct il_priv *il)
4418 {
4419         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4420 }
4421
4422 int
4423 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4424                const struct ieee80211_tx_queue_params *params)
4425 {
4426         struct il_priv *il = hw->priv;
4427         unsigned long flags;
4428         int q;
4429
4430         D_MAC80211("enter\n");
4431
4432         if (!il_is_ready_rf(il)) {
4433                 D_MAC80211("leave - RF not ready\n");
4434                 return -EIO;
4435         }
4436
4437         if (queue >= AC_NUM) {
4438                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4439                 return 0;
4440         }
4441
4442         q = AC_NUM - 1 - queue;
4443
4444         spin_lock_irqsave(&il->lock, flags);
4445
4446         il->qos_data.def_qos_parm.ac[q].cw_min =
4447             cpu_to_le16(params->cw_min);
4448         il->qos_data.def_qos_parm.ac[q].cw_max =
4449             cpu_to_le16(params->cw_max);
4450         il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4451         il->qos_data.def_qos_parm.ac[q].edca_txop =
4452             cpu_to_le16((params->txop * 32));
4453
4454         il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4455
4456         spin_unlock_irqrestore(&il->lock, flags);
4457
4458         D_MAC80211("leave\n");
4459         return 0;
4460 }
4461 EXPORT_SYMBOL(il_mac_conf_tx);
4462
4463 int
4464 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4465 {
4466         struct il_priv *il = hw->priv;
4467
4468         return il->ibss_manager == IL_IBSS_MANAGER;
4469 }
4470 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4471
4472 static int
4473 il_set_mode(struct il_priv *il)
4474 {
4475         il_connection_init_rx_config(il);
4476
4477         if (il->ops->hcmd->set_rxon_chain)
4478                 il->ops->hcmd->set_rxon_chain(il);
4479
4480         return il_commit_rxon(il);
4481 }
4482
4483 int
4484 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4485 {
4486         struct il_priv *il = hw->priv;
4487         int err;
4488
4489         D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4490
4491         mutex_lock(&il->mutex);
4492
4493         if (!il_is_ready_rf(il)) {
4494                 IL_WARN("Try to add interface when device not ready\n");
4495                 err = -EINVAL;
4496                 goto out;
4497         }
4498
4499         if (il->vif) {
4500                 err = -EOPNOTSUPP;
4501                 goto out;
4502         }
4503
4504         il->vif = vif;
4505         il->iw_mode = vif->type;
4506
4507         err = il_set_mode(il);
4508         if (err) {
4509                 il->vif = NULL;
4510                 il->iw_mode = NL80211_IFTYPE_STATION;
4511         }
4512
4513 out:
4514         mutex_unlock(&il->mutex);
4515
4516         D_MAC80211("leave\n");
4517         return err;
4518 }
4519 EXPORT_SYMBOL(il_mac_add_interface);
4520
4521 static void
4522 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif,
4523                       bool mode_change)
4524 {
4525         lockdep_assert_held(&il->mutex);
4526
4527         if (il->scan_vif == vif) {
4528                 il_scan_cancel_timeout(il, 200);
4529                 il_force_scan_end(il);
4530         }
4531
4532         if (!mode_change)
4533                 il_set_mode(il);
4534
4535 }
4536
4537 void
4538 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4539 {
4540         struct il_priv *il = hw->priv;
4541
4542         D_MAC80211("enter\n");
4543
4544         mutex_lock(&il->mutex);
4545
4546         WARN_ON(il->vif != vif);
4547         il->vif = NULL;
4548
4549         il_teardown_interface(il, vif, false);
4550
4551         memset(il->bssid, 0, ETH_ALEN);
4552         mutex_unlock(&il->mutex);
4553
4554         D_MAC80211("leave\n");
4555
4556 }
4557 EXPORT_SYMBOL(il_mac_remove_interface);
4558
4559 int
4560 il_alloc_txq_mem(struct il_priv *il)
4561 {
4562         if (!il->txq)
4563                 il->txq =
4564                     kzalloc(sizeof(struct il_tx_queue) *
4565                             il->cfg->num_of_queues, GFP_KERNEL);
4566         if (!il->txq) {
4567                 IL_ERR("Not enough memory for txq\n");
4568                 return -ENOMEM;
4569         }
4570         return 0;
4571 }
4572 EXPORT_SYMBOL(il_alloc_txq_mem);
4573
4574 void
4575 il_txq_mem(struct il_priv *il)
4576 {
4577         kfree(il->txq);
4578         il->txq = NULL;
4579 }
4580 EXPORT_SYMBOL(il_txq_mem);
4581
4582 #ifdef CONFIG_IWLEGACY_DEBUGFS
4583
4584 #define IL_TRAFFIC_DUMP_SIZE    (IL_TRAFFIC_ENTRY_SIZE * IL_TRAFFIC_ENTRIES)
4585
4586 void
4587 il_reset_traffic_log(struct il_priv *il)
4588 {
4589         il->tx_traffic_idx = 0;
4590         il->rx_traffic_idx = 0;
4591         if (il->tx_traffic)
4592                 memset(il->tx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4593         if (il->rx_traffic)
4594                 memset(il->rx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4595 }
4596
4597 int
4598 il_alloc_traffic_mem(struct il_priv *il)
4599 {
4600         u32 traffic_size = IL_TRAFFIC_DUMP_SIZE;
4601
4602         if (il_debug_level & IL_DL_TX) {
4603                 if (!il->tx_traffic) {
4604                         il->tx_traffic = kzalloc(traffic_size, GFP_KERNEL);
4605                         if (!il->tx_traffic)
4606                                 return -ENOMEM;
4607                 }
4608         }
4609         if (il_debug_level & IL_DL_RX) {
4610                 if (!il->rx_traffic) {
4611                         il->rx_traffic = kzalloc(traffic_size, GFP_KERNEL);
4612                         if (!il->rx_traffic)
4613                                 return -ENOMEM;
4614                 }
4615         }
4616         il_reset_traffic_log(il);
4617         return 0;
4618 }
4619 EXPORT_SYMBOL(il_alloc_traffic_mem);
4620
4621 void
4622 il_free_traffic_mem(struct il_priv *il)
4623 {
4624         kfree(il->tx_traffic);
4625         il->tx_traffic = NULL;
4626
4627         kfree(il->rx_traffic);
4628         il->rx_traffic = NULL;
4629 }
4630 EXPORT_SYMBOL(il_free_traffic_mem);
4631
4632 void
4633 il_dbg_log_tx_data_frame(struct il_priv *il, u16 length,
4634                          struct ieee80211_hdr *header)
4635 {
4636         __le16 fc;
4637         u16 len;
4638
4639         if (likely(!(il_debug_level & IL_DL_TX)))
4640                 return;
4641
4642         if (!il->tx_traffic)
4643                 return;
4644
4645         fc = header->frame_control;
4646         if (ieee80211_is_data(fc)) {
4647                 len =
4648                     (length >
4649                      IL_TRAFFIC_ENTRY_SIZE) ? IL_TRAFFIC_ENTRY_SIZE : length;
4650                 memcpy((il->tx_traffic +
4651                         (il->tx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)), header,
4652                        len);
4653                 il->tx_traffic_idx =
4654                     (il->tx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4655         }
4656 }
4657 EXPORT_SYMBOL(il_dbg_log_tx_data_frame);
4658
4659 void
4660 il_dbg_log_rx_data_frame(struct il_priv *il, u16 length,
4661                          struct ieee80211_hdr *header)
4662 {
4663         __le16 fc;
4664         u16 len;
4665
4666         if (likely(!(il_debug_level & IL_DL_RX)))
4667                 return;
4668
4669         if (!il->rx_traffic)
4670                 return;
4671
4672         fc = header->frame_control;
4673         if (ieee80211_is_data(fc)) {
4674                 len =
4675                     (length >
4676                      IL_TRAFFIC_ENTRY_SIZE) ? IL_TRAFFIC_ENTRY_SIZE : length;
4677                 memcpy((il->rx_traffic +
4678                         (il->rx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)), header,
4679                        len);
4680                 il->rx_traffic_idx =
4681                     (il->rx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4682         }
4683 }
4684 EXPORT_SYMBOL(il_dbg_log_rx_data_frame);
4685
4686 const char *
4687 il_get_mgmt_string(int cmd)
4688 {
4689         switch (cmd) {
4690                 IL_CMD(MANAGEMENT_ASSOC_REQ);
4691                 IL_CMD(MANAGEMENT_ASSOC_RESP);
4692                 IL_CMD(MANAGEMENT_REASSOC_REQ);
4693                 IL_CMD(MANAGEMENT_REASSOC_RESP);
4694                 IL_CMD(MANAGEMENT_PROBE_REQ);
4695                 IL_CMD(MANAGEMENT_PROBE_RESP);
4696                 IL_CMD(MANAGEMENT_BEACON);
4697                 IL_CMD(MANAGEMENT_ATIM);
4698                 IL_CMD(MANAGEMENT_DISASSOC);
4699                 IL_CMD(MANAGEMENT_AUTH);
4700                 IL_CMD(MANAGEMENT_DEAUTH);
4701                 IL_CMD(MANAGEMENT_ACTION);
4702         default:
4703                 return "UNKNOWN";
4704
4705         }
4706 }
4707
4708 const char *
4709 il_get_ctrl_string(int cmd)
4710 {
4711         switch (cmd) {
4712                 IL_CMD(CONTROL_BACK_REQ);
4713                 IL_CMD(CONTROL_BACK);
4714                 IL_CMD(CONTROL_PSPOLL);
4715                 IL_CMD(CONTROL_RTS);
4716                 IL_CMD(CONTROL_CTS);
4717                 IL_CMD(CONTROL_ACK);
4718                 IL_CMD(CONTROL_CFEND);
4719                 IL_CMD(CONTROL_CFENDACK);
4720         default:
4721                 return "UNKNOWN";
4722
4723         }
4724 }
4725
4726 void
4727 il_clear_traffic_stats(struct il_priv *il)
4728 {
4729         memset(&il->tx_stats, 0, sizeof(struct traffic_stats));
4730         memset(&il->rx_stats, 0, sizeof(struct traffic_stats));
4731 }
4732
4733 /*
4734  * if CONFIG_IWLEGACY_DEBUGFS defined,
4735  * il_update_stats function will
4736  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
4737  * Use debugFs to display the rx/rx_stats
4738  * if CONFIG_IWLEGACY_DEBUGFS not being defined, then no MGMT and CTRL
4739  * information will be recorded, but DATA pkt still will be recorded
4740  * for the reason of il_led.c need to control the led blinking based on
4741  * number of tx and rx data.
4742  *
4743  */
4744 void
4745 il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
4746 {
4747         struct traffic_stats *stats;
4748
4749         if (is_tx)
4750                 stats = &il->tx_stats;
4751         else
4752                 stats = &il->rx_stats;
4753
4754         if (ieee80211_is_mgmt(fc)) {
4755                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4756                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
4757                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
4758                         break;
4759                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
4760                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
4761                         break;
4762                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
4763                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
4764                         break;
4765                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
4766                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
4767                         break;
4768                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
4769                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
4770                         break;
4771                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
4772                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
4773                         break;
4774                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
4775                         stats->mgmt[MANAGEMENT_BEACON]++;
4776                         break;
4777                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
4778                         stats->mgmt[MANAGEMENT_ATIM]++;
4779                         break;
4780                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
4781                         stats->mgmt[MANAGEMENT_DISASSOC]++;
4782                         break;
4783                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
4784                         stats->mgmt[MANAGEMENT_AUTH]++;
4785                         break;
4786                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
4787                         stats->mgmt[MANAGEMENT_DEAUTH]++;
4788                         break;
4789                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
4790                         stats->mgmt[MANAGEMENT_ACTION]++;
4791                         break;
4792                 }
4793         } else if (ieee80211_is_ctl(fc)) {
4794                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4795                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
4796                         stats->ctrl[CONTROL_BACK_REQ]++;
4797                         break;
4798                 case cpu_to_le16(IEEE80211_STYPE_BACK):
4799                         stats->ctrl[CONTROL_BACK]++;
4800                         break;
4801                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
4802                         stats->ctrl[CONTROL_PSPOLL]++;
4803                         break;
4804                 case cpu_to_le16(IEEE80211_STYPE_RTS):
4805                         stats->ctrl[CONTROL_RTS]++;
4806                         break;
4807                 case cpu_to_le16(IEEE80211_STYPE_CTS):
4808                         stats->ctrl[CONTROL_CTS]++;
4809                         break;
4810                 case cpu_to_le16(IEEE80211_STYPE_ACK):
4811                         stats->ctrl[CONTROL_ACK]++;
4812                         break;
4813                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
4814                         stats->ctrl[CONTROL_CFEND]++;
4815                         break;
4816                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
4817                         stats->ctrl[CONTROL_CFENDACK]++;
4818                         break;
4819                 }
4820         } else {
4821                 /* data */
4822                 stats->data_cnt++;
4823                 stats->data_bytes += len;
4824         }
4825 }
4826 EXPORT_SYMBOL(il_update_stats);
4827 #endif
4828
4829 int
4830 il_force_reset(struct il_priv *il, bool external)
4831 {
4832         struct il_force_reset *force_reset;
4833
4834         if (test_bit(S_EXIT_PENDING, &il->status))
4835                 return -EINVAL;
4836
4837         force_reset = &il->force_reset;
4838         force_reset->reset_request_count++;
4839         if (!external) {
4840                 if (force_reset->last_force_reset_jiffies &&
4841                     time_after(force_reset->last_force_reset_jiffies +
4842                                force_reset->reset_duration, jiffies)) {
4843                         D_INFO("force reset rejected\n");
4844                         force_reset->reset_reject_count++;
4845                         return -EAGAIN;
4846                 }
4847         }
4848         force_reset->reset_success_count++;
4849         force_reset->last_force_reset_jiffies = jiffies;
4850
4851         /*
4852          * if the request is from external(ex: debugfs),
4853          * then always perform the request in regardless the module
4854          * parameter setting
4855          * if the request is from internal (uCode error or driver
4856          * detect failure), then fw_restart module parameter
4857          * need to be check before performing firmware reload
4858          */
4859
4860         if (!external && !il->cfg->mod_params->restart_fw) {
4861                 D_INFO("Cancel firmware reload based on "
4862                        "module parameter setting\n");
4863                 return 0;
4864         }
4865
4866         IL_ERR("On demand firmware reload\n");
4867
4868         /* Set the FW error flag -- cleared on il_down */
4869         set_bit(S_FW_ERROR, &il->status);
4870         wake_up(&il->wait_command_queue);
4871         /*
4872          * Keep the restart process from trying to send host
4873          * commands by clearing the INIT status bit
4874          */
4875         clear_bit(S_READY, &il->status);
4876         queue_work(il->workqueue, &il->restart);
4877
4878         return 0;
4879 }
4880
4881 int
4882 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4883                         enum nl80211_iftype newtype, bool newp2p)
4884 {
4885         struct il_priv *il = hw->priv;
4886         int err;
4887
4888         if (newp2p)
4889                 return -EOPNOTSUPP;
4890
4891         mutex_lock(&il->mutex);
4892
4893         if (!il->vif || !il_is_ready_rf(il)) {
4894                 /*
4895                  * Huh? But wait ... this can maybe happen when
4896                  * we're in the middle of a firmware restart!
4897                  */
4898                 err = -EBUSY;
4899                 goto out;
4900         }
4901
4902         /* success */
4903         il_teardown_interface(il, vif, true);
4904         vif->type = newtype;
4905         vif->p2p = false;
4906         err = il_set_mode(il);
4907         WARN_ON(err);
4908         /*
4909          * We've switched internally, but submitting to the
4910          * device may have failed for some reason. Mask this
4911          * error, because otherwise mac80211 will not switch
4912          * (and set the interface type back) and we'll be
4913          * out of sync with it.
4914          */
4915         err = 0;
4916
4917 out:
4918         mutex_unlock(&il->mutex);
4919         return err;
4920 }
4921 EXPORT_SYMBOL(il_mac_change_interface);
4922
4923 /*
4924  * On every watchdog tick we check (latest) time stamp. If it does not
4925  * change during timeout period and queue is not empty we reset firmware.
4926  */
4927 static int
4928 il_check_stuck_queue(struct il_priv *il, int cnt)
4929 {
4930         struct il_tx_queue *txq = &il->txq[cnt];
4931         struct il_queue *q = &txq->q;
4932         unsigned long timeout;
4933         int ret;
4934
4935         if (q->read_ptr == q->write_ptr) {
4936                 txq->time_stamp = jiffies;
4937                 return 0;
4938         }
4939
4940         timeout =
4941             txq->time_stamp +
4942             msecs_to_jiffies(il->cfg->wd_timeout);
4943
4944         if (time_after(jiffies, timeout)) {
4945                 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4946                        il->cfg->wd_timeout);
4947                 ret = il_force_reset(il, false);
4948                 return (ret == -EAGAIN) ? 0 : 1;
4949         }
4950
4951         return 0;
4952 }
4953
4954 /*
4955  * Making watchdog tick be a quarter of timeout assure we will
4956  * discover the queue hung between timeout and 1.25*timeout
4957  */
4958 #define IL_WD_TICK(timeout) ((timeout) / 4)
4959
4960 /*
4961  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4962  * we reset the firmware. If everything is fine just rearm the timer.
4963  */
4964 void
4965 il_bg_watchdog(unsigned long data)
4966 {
4967         struct il_priv *il = (struct il_priv *)data;
4968         int cnt;
4969         unsigned long timeout;
4970
4971         if (test_bit(S_EXIT_PENDING, &il->status))
4972                 return;
4973
4974         timeout = il->cfg->wd_timeout;
4975         if (timeout == 0)
4976                 return;
4977
4978         /* monitor and check for stuck cmd queue */
4979         if (il_check_stuck_queue(il, il->cmd_queue))
4980                 return;
4981
4982         /* monitor and check for other stuck queues */
4983         if (il_is_any_associated(il)) {
4984                 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4985                         /* skip as we already checked the command queue */
4986                         if (cnt == il->cmd_queue)
4987                                 continue;
4988                         if (il_check_stuck_queue(il, cnt))
4989                                 return;
4990                 }
4991         }
4992
4993         mod_timer(&il->watchdog,
4994                   jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4995 }
4996 EXPORT_SYMBOL(il_bg_watchdog);
4997
4998 void
4999 il_setup_watchdog(struct il_priv *il)
5000 {
5001         unsigned int timeout = il->cfg->wd_timeout;
5002
5003         if (timeout)
5004                 mod_timer(&il->watchdog,
5005                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
5006         else
5007                 del_timer(&il->watchdog);
5008 }
5009 EXPORT_SYMBOL(il_setup_watchdog);
5010
5011 /*
5012  * extended beacon time format
5013  * time in usec will be changed into a 32-bit value in extended:internal format
5014  * the extended part is the beacon counts
5015  * the internal part is the time in usec within one beacon interval
5016  */
5017 u32
5018 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
5019 {
5020         u32 quot;
5021         u32 rem;
5022         u32 interval = beacon_interval * TIME_UNIT;
5023
5024         if (!interval || !usec)
5025                 return 0;
5026
5027         quot =
5028             (usec /
5029              interval) & (il_beacon_time_mask_high(il,
5030                                                    il->hw_params.
5031                                                    beacon_time_tsf_bits) >> il->
5032                           hw_params.beacon_time_tsf_bits);
5033         rem =
5034             (usec % interval) & il_beacon_time_mask_low(il,
5035                                                         il->hw_params.
5036                                                         beacon_time_tsf_bits);
5037
5038         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
5039 }
5040 EXPORT_SYMBOL(il_usecs_to_beacons);
5041
5042 /* base is usually what we get from ucode with each received frame,
5043  * the same as HW timer counter counting down
5044  */
5045 __le32
5046 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
5047                    u32 beacon_interval)
5048 {
5049         u32 base_low = base & il_beacon_time_mask_low(il,
5050                                                       il->hw_params.
5051                                                       beacon_time_tsf_bits);
5052         u32 addon_low = addon & il_beacon_time_mask_low(il,
5053                                                         il->hw_params.
5054                                                         beacon_time_tsf_bits);
5055         u32 interval = beacon_interval * TIME_UNIT;
5056         u32 res = (base & il_beacon_time_mask_high(il,
5057                                                    il->hw_params.
5058                                                    beacon_time_tsf_bits)) +
5059             (addon & il_beacon_time_mask_high(il,
5060                                               il->hw_params.
5061                                               beacon_time_tsf_bits));
5062
5063         if (base_low > addon_low)
5064                 res += base_low - addon_low;
5065         else if (base_low < addon_low) {
5066                 res += interval + base_low - addon_low;
5067                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5068         } else
5069                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5070
5071         return cpu_to_le32(res);
5072 }
5073 EXPORT_SYMBOL(il_add_beacon_time);
5074
5075 #ifdef CONFIG_PM
5076
5077 int
5078 il_pci_suspend(struct device *device)
5079 {
5080         struct pci_dev *pdev = to_pci_dev(device);
5081         struct il_priv *il = pci_get_drvdata(pdev);
5082
5083         /*
5084          * This function is called when system goes into suspend state
5085          * mac80211 will call il_mac_stop() from the mac80211 suspend function
5086          * first but since il_mac_stop() has no knowledge of who the caller is,
5087          * it will not call apm_ops.stop() to stop the DMA operation.
5088          * Calling apm_ops.stop here to make sure we stop the DMA.
5089          */
5090         il_apm_stop(il);
5091
5092         return 0;
5093 }
5094 EXPORT_SYMBOL(il_pci_suspend);
5095
5096 int
5097 il_pci_resume(struct device *device)
5098 {
5099         struct pci_dev *pdev = to_pci_dev(device);
5100         struct il_priv *il = pci_get_drvdata(pdev);
5101         bool hw_rfkill = false;
5102
5103         /*
5104          * We disable the RETRY_TIMEOUT register (0x41) to keep
5105          * PCI Tx retries from interfering with C3 CPU state.
5106          */
5107         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
5108
5109         il_enable_interrupts(il);
5110
5111         if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5112                 hw_rfkill = true;
5113
5114         if (hw_rfkill)
5115                 set_bit(S_RF_KILL_HW, &il->status);
5116         else
5117                 clear_bit(S_RF_KILL_HW, &il->status);
5118
5119         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
5120
5121         return 0;
5122 }
5123 EXPORT_SYMBOL(il_pci_resume);
5124
5125 const struct dev_pm_ops il_pm_ops = {
5126         .suspend = il_pci_suspend,
5127         .resume = il_pci_resume,
5128         .freeze = il_pci_suspend,
5129         .thaw = il_pci_resume,
5130         .poweroff = il_pci_suspend,
5131         .restore = il_pci_resume,
5132 };
5133 EXPORT_SYMBOL(il_pm_ops);
5134
5135 #endif /* CONFIG_PM */
5136
5137 static void
5138 il_update_qos(struct il_priv *il)
5139 {
5140         if (test_bit(S_EXIT_PENDING, &il->status))
5141                 return;
5142
5143         il->qos_data.def_qos_parm.qos_flags = 0;
5144
5145         if (il->qos_data.qos_active)
5146                 il->qos_data.def_qos_parm.qos_flags |=
5147                     QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5148
5149         if (il->ht.enabled)
5150                 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5151
5152         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5153               il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5154
5155         il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5156                               &il->qos_data.def_qos_parm, NULL);
5157 }
5158
5159 /**
5160  * il_mac_config - mac80211 config callback
5161  */
5162 int
5163 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5164 {
5165         struct il_priv *il = hw->priv;
5166         const struct il_channel_info *ch_info;
5167         struct ieee80211_conf *conf = &hw->conf;
5168         struct ieee80211_channel *channel = conf->channel;
5169         struct il_ht_config *ht_conf = &il->current_ht_config;
5170         unsigned long flags = 0;
5171         int ret = 0;
5172         u16 ch;
5173         int scan_active = 0;
5174         bool ht_changed = false;
5175
5176         if (WARN_ON(!il->ops->legacy))
5177                 return -EOPNOTSUPP;
5178
5179         mutex_lock(&il->mutex);
5180
5181         D_MAC80211("enter to channel %d changed 0x%X\n", channel->hw_value,
5182                    changed);
5183
5184         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5185                 scan_active = 1;
5186                 D_MAC80211("scan active\n");
5187         }
5188
5189         if (changed &
5190             (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5191                 /* mac80211 uses static for non-HT which is what we want */
5192                 il->current_ht_config.smps = conf->smps_mode;
5193
5194                 /*
5195                  * Recalculate chain counts.
5196                  *
5197                  * If monitor mode is enabled then mac80211 will
5198                  * set up the SM PS mode to OFF if an HT channel is
5199                  * configured.
5200                  */
5201                 if (il->ops->hcmd->set_rxon_chain)
5202                         il->ops->hcmd->set_rxon_chain(il);
5203         }
5204
5205         /* during scanning mac80211 will delay channel setting until
5206          * scan finish with changed = 0
5207          */
5208         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5209
5210                 if (scan_active)
5211                         goto set_ch_out;
5212
5213                 ch = channel->hw_value;
5214                 ch_info = il_get_channel_info(il, channel->band, ch);
5215                 if (!il_is_channel_valid(ch_info)) {
5216                         D_MAC80211("leave - invalid channel\n");
5217                         ret = -EINVAL;
5218                         goto set_ch_out;
5219                 }
5220
5221                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5222                     !il_is_channel_ibss(ch_info)) {
5223                         D_MAC80211("leave - not IBSS channel\n");
5224                         ret = -EINVAL;
5225                         goto set_ch_out;
5226                 }
5227
5228                 spin_lock_irqsave(&il->lock, flags);
5229
5230                 /* Configure HT40 channels */
5231                 if (il->ht.enabled != conf_is_ht(conf)) {
5232                         il->ht.enabled = conf_is_ht(conf);
5233                         ht_changed = true;
5234                 }
5235                 if (il->ht.enabled) {
5236                         if (conf_is_ht40_minus(conf)) {
5237                                 il->ht.extension_chan_offset =
5238                                     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5239                                 il->ht.is_40mhz = true;
5240                         } else if (conf_is_ht40_plus(conf)) {
5241                                 il->ht.extension_chan_offset =
5242                                     IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5243                                 il->ht.is_40mhz = true;
5244                         } else {
5245                                 il->ht.extension_chan_offset =
5246                                     IEEE80211_HT_PARAM_CHA_SEC_NONE;
5247                                 il->ht.is_40mhz = false;
5248                         }
5249                 } else
5250                         il->ht.is_40mhz = false;
5251
5252                 /*
5253                  * Default to no protection. Protection mode will
5254                  * later be set from BSS config in il_ht_conf
5255                  */
5256                 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5257
5258                 /* if we are switching from ht to 2.4 clear flags
5259                  * from any ht related info since 2.4 does not
5260                  * support ht */
5261                 if ((le16_to_cpu(il->staging.channel) != ch))
5262                         il->staging.flags = 0;
5263
5264                 il_set_rxon_channel(il, channel);
5265                 il_set_rxon_ht(il, ht_conf);
5266
5267                 il_set_flags_for_band(il, channel->band, il->vif);
5268
5269                 spin_unlock_irqrestore(&il->lock, flags);
5270
5271                 if (il->ops->legacy->update_bcast_stations)
5272                         ret = il->ops->legacy->update_bcast_stations(il);
5273
5274 set_ch_out:
5275                 /* The list of supported rates and rate mask can be different
5276                  * for each band; since the band may have changed, reset
5277                  * the rate mask to what mac80211 lists */
5278                 il_set_rate(il);
5279         }
5280
5281         if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5282                 ret = il_power_update_mode(il, false);
5283                 if (ret)
5284                         D_MAC80211("Error setting sleep level\n");
5285         }
5286
5287         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5288                 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5289                            conf->power_level);
5290
5291                 il_set_tx_power(il, conf->power_level, false);
5292         }
5293
5294         if (!il_is_ready(il)) {
5295                 D_MAC80211("leave - not ready\n");
5296                 goto out;
5297         }
5298
5299         if (scan_active)
5300                 goto out;
5301
5302         if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5303                 il_commit_rxon(il);
5304         else
5305                 D_INFO("Not re-sending same RXON configuration.\n");
5306         if (ht_changed)
5307                 il_update_qos(il);
5308
5309 out:
5310         D_MAC80211("leave\n");
5311         mutex_unlock(&il->mutex);
5312         return ret;
5313 }
5314 EXPORT_SYMBOL(il_mac_config);
5315
5316 void
5317 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5318 {
5319         struct il_priv *il = hw->priv;
5320         unsigned long flags;
5321
5322         if (WARN_ON(!il->ops->legacy))
5323                 return;
5324
5325         mutex_lock(&il->mutex);
5326         D_MAC80211("enter\n");
5327
5328         spin_lock_irqsave(&il->lock, flags);
5329         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5330         spin_unlock_irqrestore(&il->lock, flags);
5331
5332         spin_lock_irqsave(&il->lock, flags);
5333
5334         /* new association get rid of ibss beacon skb */
5335         if (il->beacon_skb)
5336                 dev_kfree_skb(il->beacon_skb);
5337
5338         il->beacon_skb = NULL;
5339
5340         il->timestamp = 0;
5341
5342         spin_unlock_irqrestore(&il->lock, flags);
5343
5344         il_scan_cancel_timeout(il, 100);
5345         if (!il_is_ready_rf(il)) {
5346                 D_MAC80211("leave - not ready\n");
5347                 mutex_unlock(&il->mutex);
5348                 return;
5349         }
5350
5351         /* we are restarting association process
5352          * clear RXON_FILTER_ASSOC_MSK bit
5353          */
5354         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5355         il_commit_rxon(il);
5356
5357         il_set_rate(il);
5358
5359         mutex_unlock(&il->mutex);
5360
5361         D_MAC80211("leave\n");
5362 }
5363 EXPORT_SYMBOL(il_mac_reset_tsf);
5364
5365 static void
5366 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5367 {
5368         struct il_ht_config *ht_conf = &il->current_ht_config;
5369         struct ieee80211_sta *sta;
5370         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5371
5372         D_ASSOC("enter:\n");
5373
5374         if (!il->ht.enabled)
5375                 return;
5376
5377         il->ht.protection =
5378             bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5379         il->ht.non_gf_sta_present =
5380             !!(bss_conf->
5381                ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5382
5383         ht_conf->single_chain_sufficient = false;
5384
5385         switch (vif->type) {
5386         case NL80211_IFTYPE_STATION:
5387                 rcu_read_lock();
5388                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5389                 if (sta) {
5390                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5391                         int maxstreams;
5392
5393                         maxstreams =
5394                             (ht_cap->mcs.
5395                              tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5396                             >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5397                         maxstreams += 1;
5398
5399                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5400                             ht_cap->mcs.rx_mask[2] == 0)
5401                                 ht_conf->single_chain_sufficient = true;
5402                         if (maxstreams <= 1)
5403                                 ht_conf->single_chain_sufficient = true;
5404                 } else {
5405                         /*
5406                          * If at all, this can only happen through a race
5407                          * when the AP disconnects us while we're still
5408                          * setting up the connection, in that case mac80211
5409                          * will soon tell us about that.
5410                          */
5411                         ht_conf->single_chain_sufficient = true;
5412                 }
5413                 rcu_read_unlock();
5414                 break;
5415         case NL80211_IFTYPE_ADHOC:
5416                 ht_conf->single_chain_sufficient = true;
5417                 break;
5418         default:
5419                 break;
5420         }
5421
5422         D_ASSOC("leave\n");
5423 }
5424
5425 static inline void
5426 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5427 {
5428         /*
5429          * inform the ucode that there is no longer an
5430          * association and that no more packets should be
5431          * sent
5432          */
5433         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5434         il->staging.assoc_id = 0;
5435         il_commit_rxon(il);
5436 }
5437
5438 static void
5439 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5440 {
5441         struct il_priv *il = hw->priv;
5442         unsigned long flags;
5443         __le64 timestamp;
5444         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5445
5446         if (!skb)
5447                 return;
5448
5449         D_MAC80211("enter\n");
5450
5451         lockdep_assert_held(&il->mutex);
5452
5453         if (!il->beacon_enabled) {
5454                 IL_ERR("update beacon with no beaconing enabled\n");
5455                 dev_kfree_skb(skb);
5456                 return;
5457         }
5458
5459         spin_lock_irqsave(&il->lock, flags);
5460
5461         if (il->beacon_skb)
5462                 dev_kfree_skb(il->beacon_skb);
5463
5464         il->beacon_skb = skb;
5465
5466         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5467         il->timestamp = le64_to_cpu(timestamp);
5468
5469         D_MAC80211("leave\n");
5470         spin_unlock_irqrestore(&il->lock, flags);
5471
5472         if (!il_is_ready_rf(il)) {
5473                 D_MAC80211("leave - RF not ready\n");
5474                 return;
5475         }
5476
5477         il->ops->legacy->post_associate(il);
5478 }
5479
5480 void
5481 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5482                         struct ieee80211_bss_conf *bss_conf, u32 changes)
5483 {
5484         struct il_priv *il = hw->priv;
5485         int ret;
5486
5487         if (WARN_ON(!il->ops->legacy))
5488                 return;
5489
5490         D_MAC80211("changes = 0x%X\n", changes);
5491
5492         mutex_lock(&il->mutex);
5493
5494         if (!il_is_alive(il)) {
5495                 mutex_unlock(&il->mutex);
5496                 return;
5497         }
5498
5499         if (changes & BSS_CHANGED_QOS) {
5500                 unsigned long flags;
5501
5502                 spin_lock_irqsave(&il->lock, flags);
5503                 il->qos_data.qos_active = bss_conf->qos;
5504                 il_update_qos(il);
5505                 spin_unlock_irqrestore(&il->lock, flags);
5506         }
5507
5508         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5509                 /* FIXME: can we remove beacon_enabled ? */
5510                 if (vif->bss_conf.enable_beacon)
5511                         il->beacon_enabled = true;
5512                 else
5513                         il->beacon_enabled = false;
5514         }
5515
5516         if (changes & BSS_CHANGED_BSSID) {
5517                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5518
5519                 /*
5520                  * If there is currently a HW scan going on in the
5521                  * background then we need to cancel it else the RXON
5522                  * below/in post_associate will fail.
5523                  */
5524                 if (il_scan_cancel_timeout(il, 100)) {
5525                         IL_WARN("Aborted scan still in progress after 100ms\n");
5526                         D_MAC80211("leaving - scan abort failed.\n");
5527                         mutex_unlock(&il->mutex);
5528                         return;
5529                 }
5530
5531                 /* mac80211 only sets assoc when in STATION mode */
5532                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
5533                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5534                                ETH_ALEN);
5535
5536                         /* currently needed in a few places */
5537                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5538                 } else {
5539                         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5540                 }
5541
5542         }
5543
5544         /*
5545          * This needs to be after setting the BSSID in case
5546          * mac80211 decides to do both changes at once because
5547          * it will invoke post_associate.
5548          */
5549         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5550                 il_beacon_update(hw, vif);
5551
5552         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5553                 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5554                 if (bss_conf->use_short_preamble)
5555                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5556                 else
5557                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5558         }
5559
5560         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5561                 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5562                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5563                         il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5564                 else
5565                         il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5566                 if (bss_conf->use_cts_prot)
5567                         il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5568                 else
5569                         il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5570         }
5571
5572         if (changes & BSS_CHANGED_BASIC_RATES) {
5573                 /* XXX use this information
5574                  *
5575                  * To do that, remove code from il_set_rate() and put something
5576                  * like this here:
5577                  *
5578                  if (A-band)
5579                  il->staging.ofdm_basic_rates =
5580                  bss_conf->basic_rates;
5581                  else
5582                  il->staging.ofdm_basic_rates =
5583                  bss_conf->basic_rates >> 4;
5584                  il->staging.cck_basic_rates =
5585                  bss_conf->basic_rates & 0xF;
5586                  */
5587         }
5588
5589         if (changes & BSS_CHANGED_HT) {
5590                 il_ht_conf(il, vif);
5591
5592                 if (il->ops->hcmd->set_rxon_chain)
5593                         il->ops->hcmd->set_rxon_chain(il);
5594         }
5595
5596         if (changes & BSS_CHANGED_ASSOC) {
5597                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5598                 if (bss_conf->assoc) {
5599                         il->timestamp = bss_conf->timestamp;
5600
5601                         if (!il_is_rfkill(il))
5602                                 il->ops->legacy->post_associate(il);
5603                 } else
5604                         il_set_no_assoc(il, vif);
5605         }
5606
5607         if (changes && il_is_associated(il) && bss_conf->aid) {
5608                 D_MAC80211("Changes (%#x) while associated\n", changes);
5609                 ret = il_send_rxon_assoc(il);
5610                 if (!ret) {
5611                         /* Sync active_rxon with latest change. */
5612                         memcpy((void *)&il->active, &il->staging,
5613                                sizeof(struct il_rxon_cmd));
5614                 }
5615         }
5616
5617         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5618                 if (vif->bss_conf.enable_beacon) {
5619                         memcpy(il->staging.bssid_addr, bss_conf->bssid,
5620                                ETH_ALEN);
5621                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5622                         il->ops->legacy->config_ap(il);
5623                 } else
5624                         il_set_no_assoc(il, vif);
5625         }
5626
5627         if (changes & BSS_CHANGED_IBSS) {
5628                 ret =
5629                     il->ops->legacy->manage_ibss_station(il, vif,
5630                                                          bss_conf->ibss_joined);
5631                 if (ret)
5632                         IL_ERR("failed to %s IBSS station %pM\n",
5633                                bss_conf->ibss_joined ? "add" : "remove",
5634                                bss_conf->bssid);
5635         }
5636
5637         mutex_unlock(&il->mutex);
5638
5639         D_MAC80211("leave\n");
5640 }
5641 EXPORT_SYMBOL(il_mac_bss_info_changed);
5642
5643 irqreturn_t
5644 il_isr(int irq, void *data)
5645 {
5646         struct il_priv *il = data;
5647         u32 inta, inta_mask;
5648         u32 inta_fh;
5649         unsigned long flags;
5650         if (!il)
5651                 return IRQ_NONE;
5652
5653         spin_lock_irqsave(&il->lock, flags);
5654
5655         /* Disable (but don't clear!) interrupts here to avoid
5656          *    back-to-back ISRs and sporadic interrupts from our NIC.
5657          * If we have something to service, the tasklet will re-enable ints.
5658          * If we *don't* have something, we'll re-enable before leaving here. */
5659         inta_mask = _il_rd(il, CSR_INT_MASK);   /* just for debug */
5660         _il_wr(il, CSR_INT_MASK, 0x00000000);
5661
5662         /* Discover which interrupts are active/pending */
5663         inta = _il_rd(il, CSR_INT);
5664         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5665
5666         /* Ignore interrupt if there's nothing in NIC to service.
5667          * This may be due to IRQ shared with another device,
5668          * or due to sporadic interrupts thrown from our NIC. */
5669         if (!inta && !inta_fh) {
5670                 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5671                 goto none;
5672         }
5673
5674         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5675                 /* Hardware disappeared. It might have already raised
5676                  * an interrupt */
5677                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5678                 goto unplugged;
5679         }
5680
5681         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5682               inta_fh);
5683
5684         inta &= ~CSR_INT_BIT_SCD;
5685
5686         /* il_irq_tasklet() will service interrupts and re-enable them */
5687         if (likely(inta || inta_fh))
5688                 tasklet_schedule(&il->irq_tasklet);
5689
5690 unplugged:
5691         spin_unlock_irqrestore(&il->lock, flags);
5692         return IRQ_HANDLED;
5693
5694 none:
5695         /* re-enable interrupts here since we don't have anything to service. */
5696         /* only Re-enable if disabled by irq */
5697         if (test_bit(S_INT_ENABLED, &il->status))
5698                 il_enable_interrupts(il);
5699         spin_unlock_irqrestore(&il->lock, flags);
5700         return IRQ_NONE;
5701 }
5702 EXPORT_SYMBOL(il_isr);
5703
5704 /*
5705  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5706  *  function.
5707  */
5708 void
5709 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5710                      __le16 fc, __le32 *tx_flags)
5711 {
5712         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5713                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5714                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5715                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5716
5717                 if (!ieee80211_is_mgmt(fc))
5718                         return;
5719
5720                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5721                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5722                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5723                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5724                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5725                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5726                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5727                         break;
5728                 }
5729         } else if (info->control.rates[0].
5730                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5731                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5732                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5733                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5734         }
5735 }
5736 EXPORT_SYMBOL(il_tx_cmd_protection);