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 "iwl-eeprom.h"
  44 #include "iwl-dev.h"
  45 #include "iwl-debug.h"
  46 #include "common.h"
  47 #include "iwl-io.h"
  48 #include "iwl-power.h"
  49 #include "iwl-sta.h"
  50 #include "iwl-helpers.h"
  51
  52 const char *il_get_cmd_string(u8 cmd)
  53 {
  54         switch (cmd) {
  55                 IL_CMD(N_ALIVE);
  56                 IL_CMD(N_ERROR);
  57                 IL_CMD(C_RXON);
  58                 IL_CMD(C_RXON_ASSOC);
  59                 IL_CMD(C_QOS_PARAM);
  60                 IL_CMD(C_RXON_TIMING);
  61                 IL_CMD(C_ADD_STA);
  62                 IL_CMD(C_REM_STA);
  63                 IL_CMD(C_WEPKEY);
  64                 IL_CMD(N_3945_RX);
  65                 IL_CMD(C_TX);
  66                 IL_CMD(C_RATE_SCALE);
  67                 IL_CMD(C_LEDS);
  68                 IL_CMD(C_TX_LINK_QUALITY_CMD);
  69                 IL_CMD(C_CHANNEL_SWITCH);
  70                 IL_CMD(N_CHANNEL_SWITCH);
  71                 IL_CMD(C_SPECTRUM_MEASUREMENT);
  72                 IL_CMD(N_SPECTRUM_MEASUREMENT);
  73                 IL_CMD(C_POWER_TBL);
  74                 IL_CMD(N_PM_SLEEP);
  75                 IL_CMD(N_PM_DEBUG_STATS);
  76                 IL_CMD(C_SCAN);
  77                 IL_CMD(C_SCAN_ABORT);
  78                 IL_CMD(N_SCAN_START);
  79                 IL_CMD(N_SCAN_RESULTS);
  80                 IL_CMD(N_SCAN_COMPLETE);
  81                 IL_CMD(N_BEACON);
  82                 IL_CMD(C_TX_BEACON);
  83                 IL_CMD(C_TX_PWR_TBL);
  84                 IL_CMD(C_BT_CONFIG);
  85                 IL_CMD(C_STATS);
  86                 IL_CMD(N_STATS);
  87                 IL_CMD(N_CARD_STATE);
  88                 IL_CMD(N_MISSED_BEACONS);
  89                 IL_CMD(C_CT_KILL_CONFIG);
  90                 IL_CMD(C_SENSITIVITY);
  91                 IL_CMD(C_PHY_CALIBRATION);
  92                 IL_CMD(N_RX_PHY);
  93                 IL_CMD(N_RX_MPDU);
  94                 IL_CMD(N_RX);
  95                 IL_CMD(N_COMPRESSED_BA);
  96         default:
  97                 return "UNKNOWN";
  98
  99         }
 100 }
 101 EXPORT_SYMBOL(il_get_cmd_string);
 102
 103 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 104
 105 static void il_generic_cmd_callback(struct il_priv *il,
 106                                      struct il_device_cmd *cmd,
 107                                      struct il_rx_pkt *pkt)
 108 {
 109         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 110                 IL_ERR("Bad return from %s (0x%08X)\n",
 111                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 112                 return;
 113         }
 114
 115 #ifdef CONFIG_IWLEGACY_DEBUG
 116         switch (cmd->hdr.cmd) {
 117         case C_TX_LINK_QUALITY_CMD:
 118         case C_SENSITIVITY:
 119                 D_HC_DUMP("back from %s (0x%08X)\n",
 120                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 121                 break;
 122         default:
 123                 D_HC("back from %s (0x%08X)\n",
 124                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 125         }
 126 #endif
 127 }
 128
 129 static int
 130 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 131 {
 132         int ret;
 133
 134         BUG_ON(!(cmd->flags & CMD_ASYNC));
 135
 136         /* An asynchronous command can not expect an SKB to be set. */
 137         BUG_ON(cmd->flags & CMD_WANT_SKB);
 138
 139         /* Assign a generic callback if one is not provided */
 140         if (!cmd->callback)
 141                 cmd->callback = il_generic_cmd_callback;
 142
 143         if (test_bit(S_EXIT_PENDING, &il->status))
 144                 return -EBUSY;
 145
 146         ret = il_enqueue_hcmd(il, cmd);
 147         if (ret < 0) {
 148                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 149                           il_get_cmd_string(cmd->id), ret);
 150                 return ret;
 151         }
 152         return 0;
 153 }
 154
 155 int il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 156 {
 157         int cmd_idx;
 158         int ret;
 159
 160         lockdep_assert_held(&il->mutex);
 161
 162         BUG_ON(cmd->flags & CMD_ASYNC);
 163
 164          /* A synchronous command can not have a callback set. */
 165         BUG_ON(cmd->callback);
 166
 167         D_INFO("Attempting to send sync command %s\n",
 168                         il_get_cmd_string(cmd->id));
 169
 170         set_bit(S_HCMD_ACTIVE, &il->status);
 171         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 172                         il_get_cmd_string(cmd->id));
 173
 174         cmd_idx = il_enqueue_hcmd(il, cmd);
 175         if (cmd_idx < 0) {
 176                 ret = cmd_idx;
 177                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 178                           il_get_cmd_string(cmd->id), ret);
 179                 goto out;
 180         }
 181
 182         ret = wait_event_timeout(il->wait_command_queue,
 183                         !test_bit(S_HCMD_ACTIVE, &il->status),
 184                         HOST_COMPLETE_TIMEOUT);
 185         if (!ret) {
 186                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 187                         IL_ERR(
 188                                 "Error sending %s: time out after %dms.\n",
 189                                 il_get_cmd_string(cmd->id),
 190                                 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 191
 192                         clear_bit(S_HCMD_ACTIVE, &il->status);
 193                         D_INFO(
 194                                 "Clearing HCMD_ACTIVE for command %s\n",
 195                                        il_get_cmd_string(cmd->id));
 196                         ret = -ETIMEDOUT;
 197                         goto cancel;
 198                 }
 199         }
 200
 201         if (test_bit(S_RF_KILL_HW, &il->status)) {
 202                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 203                                il_get_cmd_string(cmd->id));
 204                 ret = -ECANCELED;
 205                 goto fail;
 206         }
 207         if (test_bit(S_FW_ERROR, &il->status)) {
 208                 IL_ERR("Command %s failed: FW Error\n",
 209                                il_get_cmd_string(cmd->id));
 210                 ret = -EIO;
 211                 goto fail;
 212         }
 213         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 214                 IL_ERR("Error: Response NULL in '%s'\n",
 215                           il_get_cmd_string(cmd->id));
 216                 ret = -EIO;
 217                 goto cancel;
 218         }
 219
 220         ret = 0;
 221         goto out;
 222
 223 cancel:
 224         if (cmd->flags & CMD_WANT_SKB) {
 225                 /*
 226                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 227                  * TX cmd queue. Otherwise in case the cmd comes
 228                  * in later, it will possibly set an invalid
 229                  * address (cmd->meta.source).
 230                  */
 231                 il->txq[il->cmd_queue].meta[cmd_idx].flags &=
 232                                                         ~CMD_WANT_SKB;
 233         }
 234 fail:
 235         if (cmd->reply_page) {
 236                 il_free_pages(il, cmd->reply_page);
 237                 cmd->reply_page = 0;
 238         }
 239 out:
 240         return ret;
 241 }
 242 EXPORT_SYMBOL(il_send_cmd_sync);
 243
 244 int il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 245 {
 246         if (cmd->flags & CMD_ASYNC)
 247                 return il_send_cmd_async(il, cmd);
 248
 249         return il_send_cmd_sync(il, cmd);
 250 }
 251 EXPORT_SYMBOL(il_send_cmd);
 252
 253 int
 254 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 255 {
 256         struct il_host_cmd cmd = {
 257                 .id = id,
 258                 .len = len,
 259                 .data = data,
 260         };
 261
 262         return il_send_cmd_sync(il, &cmd);
 263 }
 264 EXPORT_SYMBOL(il_send_cmd_pdu);
 265
 266 int il_send_cmd_pdu_async(struct il_priv *il,
 267                            u8 id, u16 len, const void *data,
 268                            void (*callback)(struct il_priv *il,
 269                                             struct il_device_cmd *cmd,
 270                                             struct il_rx_pkt *pkt))
 271 {
 272         struct il_host_cmd cmd = {
 273                 .id = id,
 274                 .len = len,
 275                 .data = data,
 276         };
 277
 278         cmd.flags |= CMD_ASYNC;
 279         cmd.callback = callback;
 280
 281         return il_send_cmd_async(il, &cmd);
 282 }
 283 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 284
 285 /* default: IL_LED_BLINK(0) using blinking idx table */
 286 static int led_mode;
 287 module_param(led_mode, int, S_IRUGO);
 288 MODULE_PARM_DESC(led_mode, "0=system default, "
 289                 "1=On(RF On)/Off(RF Off), 2=blinking");
 290
 291 /* Throughput           OFF time(ms)    ON time (ms)
 292  *      >300                    25              25
 293  *      >200 to 300             40              40
 294  *      >100 to 200             55              55
 295  *      >70 to 100              65              65
 296  *      >50 to 70               75              75
 297  *      >20 to 50               85              85
 298  *      >10 to 20               95              95
 299  *      >5 to 10                110             110
 300  *      >1 to 5                 130             130
 301  *      >0 to 1                 167             167
 302  *      <=0                                     SOLID ON
 303  */
 304 static const struct ieee80211_tpt_blink il_blink[] = {
 305         { .throughput = 0, .blink_time = 334 },
 306         { .throughput = 1 * 1024 - 1, .blink_time = 260 },
 307         { .throughput = 5 * 1024 - 1, .blink_time = 220 },
 308         { .throughput = 10 * 1024 - 1, .blink_time = 190 },
 309         { .throughput = 20 * 1024 - 1, .blink_time = 170 },
 310         { .throughput = 50 * 1024 - 1, .blink_time = 150 },
 311         { .throughput = 70 * 1024 - 1, .blink_time = 130 },
 312         { .throughput = 100 * 1024 - 1, .blink_time = 110 },
 313         { .throughput = 200 * 1024 - 1, .blink_time = 80 },
 314         { .throughput = 300 * 1024 - 1, .blink_time = 50 },
 315 };
 316
 317 /*
 318  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 319  * Led blink rate analysis showed an average deviation of 0% on 3945,
 320  * 5% on 4965 HW.
 321  * Need to compensate on the led on/off time per HW according to the deviation
 322  * to achieve the desired led frequency
 323  * The calculation is: (100-averageDeviation)/100 * blinkTime
 324  * For code efficiency the calculation will be:
 325  *     compensation = (100 - averageDeviation) * 64 / 100
 326  *     NewBlinkTime = (compensation * BlinkTime) / 64
 327  */
 328 static inline u8 il_blink_compensation(struct il_priv *il,
 329                                     u8 time, u16 compensation)
 330 {
 331         if (!compensation) {
 332                 IL_ERR("undefined blink compensation: "
 333                         "use pre-defined blinking time\n");
 334                 return time;
 335         }
 336
 337         return (u8)((time * compensation) >> 6);
 338 }
 339
 340 /* Set led pattern command */
 341 static int il_led_cmd(struct il_priv *il,
 342                        unsigned long on,
 343                        unsigned long off)
 344 {
 345         struct il_led_cmd led_cmd = {
 346                 .id = IL_LED_LINK,
 347                 .interval = IL_DEF_LED_INTRVL
 348         };
 349         int ret;
 350
 351         if (!test_bit(S_READY, &il->status))
 352                 return -EBUSY;
 353
 354         if (il->blink_on == on && il->blink_off == off)
 355                 return 0;
 356
 357         if (off == 0) {
 358                 /* led is SOLID_ON */
 359                 on = IL_LED_SOLID;
 360         }
 361
 362         D_LED("Led blink time compensation=%u\n",
 363                         il->cfg->base_params->led_compensation);
 364         led_cmd.on = il_blink_compensation(il, on,
 365                                 il->cfg->base_params->led_compensation);
 366         led_cmd.off = il_blink_compensation(il, off,
 367                                 il->cfg->base_params->led_compensation);
 368
 369         ret = il->cfg->ops->led->cmd(il, &led_cmd);
 370         if (!ret) {
 371                 il->blink_on = on;
 372                 il->blink_off = off;
 373         }
 374         return ret;
 375 }
 376
 377 static void il_led_brightness_set(struct led_classdev *led_cdev,
 378                                    enum led_brightness brightness)
 379 {
 380         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 381         unsigned long on = 0;
 382
 383         if (brightness > 0)
 384                 on = IL_LED_SOLID;
 385
 386         il_led_cmd(il, on, 0);
 387 }
 388
 389 static int il_led_blink_set(struct led_classdev *led_cdev,
 390                              unsigned long *delay_on,
 391                              unsigned long *delay_off)
 392 {
 393         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 394
 395         return il_led_cmd(il, *delay_on, *delay_off);
 396 }
 397
 398 void il_leds_init(struct il_priv *il)
 399 {
 400         int mode = led_mode;
 401         int ret;
 402
 403         if (mode == IL_LED_DEFAULT)
 404                 mode = il->cfg->led_mode;
 405
 406         il->led.name = kasprintf(GFP_KERNEL, "%s-led",
 407                                    wiphy_name(il->hw->wiphy));
 408         il->led.brightness_set = il_led_brightness_set;
 409         il->led.blink_set = il_led_blink_set;
 410         il->led.max_brightness = 1;
 411
 412         switch (mode) {
 413         case IL_LED_DEFAULT:
 414                 WARN_ON(1);
 415                 break;
 416         case IL_LED_BLINK:
 417                 il->led.default_trigger =
 418                         ieee80211_create_tpt_led_trigger(il->hw,
 419                                         IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 420                                         il_blink, ARRAY_SIZE(il_blink));
 421                 break;
 422         case IL_LED_RF_STATE:
 423                 il->led.default_trigger =
 424                         ieee80211_get_radio_led_name(il->hw);
 425                 break;
 426         }
 427
 428         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 429         if (ret) {
 430                 kfree(il->led.name);
 431                 return;
 432         }
 433
 434         il->led_registered = true;
 435 }
 436 EXPORT_SYMBOL(il_leds_init);
 437
 438 void il_leds_exit(struct il_priv *il)
 439 {
 440         if (!il->led_registered)
 441                 return;
 442
 443         led_classdev_unregister(&il->led);
 444         kfree(il->led.name);
 445 }
 446 EXPORT_SYMBOL(il_leds_exit);
 447
 448 /************************** EEPROM BANDS ****************************
 449  *
 450  * The il_eeprom_band definitions below provide the mapping from the
 451  * EEPROM contents to the specific channel number supported for each
 452  * band.
 453  *
 454  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 455  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 456  * The specific geography and calibration information for that channel
 457  * is contained in the eeprom map itself.
 458  *
 459  * During init, we copy the eeprom information and channel map
 460  * information into il->channel_info_24/52 and il->channel_map_24/52
 461  *
 462  * channel_map_24/52 provides the idx in the channel_info array for a
 463  * given channel.  We have to have two separate maps as there is channel
 464  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 465  * band_2
 466  *
 467  * A value of 0xff stored in the channel_map indicates that the channel
 468  * is not supported by the hardware at all.
 469  *
 470  * A value of 0xfe in the channel_map indicates that the channel is not
 471  * valid for Tx with the current hardware.  This means that
 472  * while the system can tune and receive on a given channel, it may not
 473  * be able to associate or transmit any frames on that
 474  * channel.  There is no corresponding channel information for that
 475  * entry.
 476  *
 477  *********************************************************************/
 478
 479 /* 2.4 GHz */
 480 const u8 il_eeprom_band_1[14] = {
 481         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 482 };
 483
 484 /* 5.2 GHz bands */
 485 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 486         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 487 };
 488
 489 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 490         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 491 };
 492
 493 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 494         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 495 };
 496
 497 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 498         145, 149, 153, 157, 161, 165
 499 };
 500
 501 static const u8 il_eeprom_band_6[] = {       /* 2.4 ht40 channel */
 502         1, 2, 3, 4, 5, 6, 7
 503 };
 504
 505 static const u8 il_eeprom_band_7[] = {       /* 5.2 ht40 channel */
 506         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 507 };
 508
 509 /******************************************************************************
 510  *
 511  * EEPROM related functions
 512  *
 513 ******************************************************************************/
 514
 515 static int il_eeprom_verify_signature(struct il_priv *il)
 516 {
 517         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 518         int ret = 0;
 519
 520         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 521         switch (gp) {
 522         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 523         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 524                 break;
 525         default:
 526                 IL_ERR("bad EEPROM signature,"
 527                         "EEPROM_GP=0x%08x\n", gp);
 528                 ret = -ENOENT;
 529                 break;
 530         }
 531         return ret;
 532 }
 533
 534 const u8
 535 *il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 536 {
 537         BUG_ON(offset >= il->cfg->base_params->eeprom_size);
 538         return &il->eeprom[offset];
 539 }
 540 EXPORT_SYMBOL(il_eeprom_query_addr);
 541
 542 u16 il_eeprom_query16(const struct il_priv *il, size_t offset)
 543 {
 544         if (!il->eeprom)
 545                 return 0;
 546         return (u16)il->eeprom[offset] | ((u16)il->eeprom[offset + 1] << 8);
 547 }
 548 EXPORT_SYMBOL(il_eeprom_query16);
 549
 550 /**
 551  * il_eeprom_init - read EEPROM contents
 552  *
 553  * Load the EEPROM contents from adapter into il->eeprom
 554  *
 555  * NOTE:  This routine uses the non-debug IO access functions.
 556  */
 557 int il_eeprom_init(struct il_priv *il)
 558 {
 559         __le16 *e;
 560         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 561         int sz;
 562         int ret;
 563         u16 addr;
 564
 565         /* allocate eeprom */
 566         sz = il->cfg->base_params->eeprom_size;
 567         D_EEPROM("NVM size = %d\n", sz);
 568         il->eeprom = kzalloc(sz, GFP_KERNEL);
 569         if (!il->eeprom) {
 570                 ret = -ENOMEM;
 571                 goto alloc_err;
 572         }
 573         e = (__le16 *)il->eeprom;
 574
 575         il->cfg->ops->lib->apm_ops.init(il);
 576
 577         ret = il_eeprom_verify_signature(il);
 578         if (ret < 0) {
 579                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 580                 ret = -ENOENT;
 581                 goto err;
 582         }
 583
 584         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 585         ret = il->cfg->ops->lib->eeprom_ops.acquire_semaphore(il);
 586         if (ret < 0) {
 587                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 588                 ret = -ENOENT;
 589                 goto err;
 590         }
 591
 592         /* eeprom is an array of 16bit values */
 593         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 594                 u32 r;
 595
 596                 _il_wr(il, CSR_EEPROM_REG,
 597                              CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 598
 599                 ret = _il_poll_bit(il, CSR_EEPROM_REG,
 600                                           CSR_EEPROM_REG_READ_VALID_MSK,
 601                                           CSR_EEPROM_REG_READ_VALID_MSK,
 602                                           IL_EEPROM_ACCESS_TIMEOUT);
 603                 if (ret < 0) {
 604                         IL_ERR("Time out reading EEPROM[%d]\n",
 605                                                         addr);
 606                         goto done;
 607                 }
 608                 r = _il_rd(il, CSR_EEPROM_REG);
 609                 e[addr / 2] = cpu_to_le16(r >> 16);
 610         }
 611
 612         D_EEPROM("NVM Type: %s, version: 0x%x\n",
 613                        "EEPROM",
 614                        il_eeprom_query16(il, EEPROM_VERSION));
 615
 616         ret = 0;
 617 done:
 618         il->cfg->ops->lib->eeprom_ops.release_semaphore(il);
 619
 620 err:
 621         if (ret)
 622                 il_eeprom_free(il);
 623         /* Reset chip to save power until we load uCode during "up". */
 624         il_apm_stop(il);
 625 alloc_err:
 626         return ret;
 627 }
 628 EXPORT_SYMBOL(il_eeprom_init);
 629
 630 void il_eeprom_free(struct il_priv *il)
 631 {
 632         kfree(il->eeprom);
 633         il->eeprom = NULL;
 634 }
 635 EXPORT_SYMBOL(il_eeprom_free);
 636
 637 static void il_init_band_reference(const struct il_priv *il,
 638                         int eep_band, int *eeprom_ch_count,
 639                         const struct il_eeprom_channel **eeprom_ch_info,
 640                         const u8 **eeprom_ch_idx)
 641 {
 642         u32 offset = il->cfg->ops->lib->
 643                         eeprom_ops.regulatory_bands[eep_band - 1];
 644         switch (eep_band) {
 645         case 1:         /* 2.4GHz band */
 646                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 647                 *eeprom_ch_info = (struct il_eeprom_channel *)
 648                                 il_eeprom_query_addr(il, offset);
 649                 *eeprom_ch_idx = il_eeprom_band_1;
 650                 break;
 651         case 2:         /* 4.9GHz band */
 652                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 653                 *eeprom_ch_info = (struct il_eeprom_channel *)
 654                                 il_eeprom_query_addr(il, offset);
 655                 *eeprom_ch_idx = il_eeprom_band_2;
 656                 break;
 657         case 3:         /* 5.2GHz band */
 658                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 659                 *eeprom_ch_info = (struct il_eeprom_channel *)
 660                                 il_eeprom_query_addr(il, offset);
 661                 *eeprom_ch_idx = il_eeprom_band_3;
 662                 break;
 663         case 4:         /* 5.5GHz band */
 664                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 665                 *eeprom_ch_info = (struct il_eeprom_channel *)
 666                                 il_eeprom_query_addr(il, offset);
 667                 *eeprom_ch_idx = il_eeprom_band_4;
 668                 break;
 669         case 5:         /* 5.7GHz band */
 670                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 671                 *eeprom_ch_info = (struct il_eeprom_channel *)
 672                                 il_eeprom_query_addr(il, offset);
 673                 *eeprom_ch_idx = il_eeprom_band_5;
 674                 break;
 675         case 6:         /* 2.4GHz ht40 channels */
 676                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 677                 *eeprom_ch_info = (struct il_eeprom_channel *)
 678                                 il_eeprom_query_addr(il, offset);
 679                 *eeprom_ch_idx = il_eeprom_band_6;
 680                 break;
 681         case 7:         /* 5 GHz ht40 channels */
 682                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 683                 *eeprom_ch_info = (struct il_eeprom_channel *)
 684                                 il_eeprom_query_addr(il, offset);
 685                 *eeprom_ch_idx = il_eeprom_band_7;
 686                 break;
 687         default:
 688                 BUG();
 689         }
 690 }
 691
 692 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 693                             ? # x " " : "")
 694 /**
 695  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 696  *
 697  * Does not set up a command, or touch hardware.
 698  */
 699 static int il_mod_ht40_chan_info(struct il_priv *il,
 700                               enum ieee80211_band band, u16 channel,
 701                               const struct il_eeprom_channel *eeprom_ch,
 702                               u8 clear_ht40_extension_channel)
 703 {
 704         struct il_channel_info *ch_info;
 705
 706         ch_info = (struct il_channel_info *)
 707                         il_get_channel_info(il, band, channel);
 708
 709         if (!il_is_channel_valid(ch_info))
 710                 return -1;
 711
 712         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 713                         " Ad-Hoc %ssupported\n",
 714                         ch_info->channel,
 715                         il_is_channel_a_band(ch_info) ?
 716                         "5.2" : "2.4",
 717                         CHECK_AND_PRINT(IBSS),
 718                         CHECK_AND_PRINT(ACTIVE),
 719                         CHECK_AND_PRINT(RADAR),
 720                         CHECK_AND_PRINT(WIDE),
 721                         CHECK_AND_PRINT(DFS),
 722                         eeprom_ch->flags,
 723                         eeprom_ch->max_power_avg,
 724                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 725                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 726                         "" : "not ");
 727
 728         ch_info->ht40_eeprom = *eeprom_ch;
 729         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 730         ch_info->ht40_flags = eeprom_ch->flags;
 731         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 732                 ch_info->ht40_extension_channel &=
 733                                         ~clear_ht40_extension_channel;
 734
 735         return 0;
 736 }
 737
 738 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 739                             ? # x " " : "")
 740
 741 /**
 742  * il_init_channel_map - Set up driver's info for all possible channels
 743  */
 744 int il_init_channel_map(struct il_priv *il)
 745 {
 746         int eeprom_ch_count = 0;
 747         const u8 *eeprom_ch_idx = NULL;
 748         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 749         int band, ch;
 750         struct il_channel_info *ch_info;
 751
 752         if (il->channel_count) {
 753                 D_EEPROM("Channel map already initialized.\n");
 754                 return 0;
 755         }
 756
 757         D_EEPROM("Initializing regulatory info from EEPROM\n");
 758
 759         il->channel_count =
 760             ARRAY_SIZE(il_eeprom_band_1) +
 761             ARRAY_SIZE(il_eeprom_band_2) +
 762             ARRAY_SIZE(il_eeprom_band_3) +
 763             ARRAY_SIZE(il_eeprom_band_4) +
 764             ARRAY_SIZE(il_eeprom_band_5);
 765
 766         D_EEPROM("Parsing data for %d channels.\n",
 767                         il->channel_count);
 768
 769         il->channel_info = kzalloc(sizeof(struct il_channel_info) *
 770                                      il->channel_count, GFP_KERNEL);
 771         if (!il->channel_info) {
 772                 IL_ERR("Could not allocate channel_info\n");
 773                 il->channel_count = 0;
 774                 return -ENOMEM;
 775         }
 776
 777         ch_info = il->channel_info;
 778
 779         /* Loop through the 5 EEPROM bands adding them in order to the
 780          * channel map we maintain (that contains additional information than
 781          * what just in the EEPROM) */
 782         for (band = 1; band <= 5; band++) {
 783
 784                 il_init_band_reference(il, band, &eeprom_ch_count,
 785                                         &eeprom_ch_info, &eeprom_ch_idx);
 786
 787                 /* Loop through each band adding each of the channels */
 788                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 789                         ch_info->channel = eeprom_ch_idx[ch];
 790                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
 791                             IEEE80211_BAND_5GHZ;
 792
 793                         /* permanently store EEPROM's channel regulatory flags
 794                          *   and max power in channel info database. */
 795                         ch_info->eeprom = eeprom_ch_info[ch];
 796
 797                         /* Copy the run-time flags so they are there even on
 798                          * invalid channels */
 799                         ch_info->flags = eeprom_ch_info[ch].flags;
 800                         /* First write that ht40 is not enabled, and then enable
 801                          * one by one */
 802                         ch_info->ht40_extension_channel =
 803                                         IEEE80211_CHAN_NO_HT40;
 804
 805                         if (!(il_is_channel_valid(ch_info))) {
 806                                 D_EEPROM(
 807                                                "Ch. %d Flags %x [%sGHz] - "
 808                                                "No traffic\n",
 809                                                ch_info->channel,
 810                                                ch_info->flags,
 811                                                il_is_channel_a_band(ch_info) ?
 812                                                "5.2" : "2.4");
 813                                 ch_info++;
 814                                 continue;
 815                         }
 816
 817                         /* Initialize regulatory-based run-time data */
 818                         ch_info->max_power_avg = ch_info->curr_txpow =
 819                             eeprom_ch_info[ch].max_power_avg;
 820                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 821                         ch_info->min_power = 0;
 822
 823                         D_EEPROM("Ch. %d [%sGHz] "
 824                                        "%s%s%s%s%s%s(0x%02x %ddBm):"
 825                                        " Ad-Hoc %ssupported\n",
 826                                        ch_info->channel,
 827                                        il_is_channel_a_band(ch_info) ?
 828                                        "5.2" : "2.4",
 829                                        CHECK_AND_PRINT_I(VALID),
 830                                        CHECK_AND_PRINT_I(IBSS),
 831                                        CHECK_AND_PRINT_I(ACTIVE),
 832                                        CHECK_AND_PRINT_I(RADAR),
 833                                        CHECK_AND_PRINT_I(WIDE),
 834                                        CHECK_AND_PRINT_I(DFS),
 835                                        eeprom_ch_info[ch].flags,
 836                                        eeprom_ch_info[ch].max_power_avg,
 837                                        ((eeprom_ch_info[ch].
 838                                          flags & EEPROM_CHANNEL_IBSS)
 839                                         && !(eeprom_ch_info[ch].
 840                                              flags & EEPROM_CHANNEL_RADAR))
 841                                        ? "" : "not ");
 842
 843                         ch_info++;
 844                 }
 845         }
 846
 847         /* Check if we do have HT40 channels */
 848         if (il->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
 849             EEPROM_REGULATORY_BAND_NO_HT40 &&
 850             il->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
 851             EEPROM_REGULATORY_BAND_NO_HT40)
 852                 return 0;
 853
 854         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
 855         for (band = 6; band <= 7; band++) {
 856                 enum ieee80211_band ieeeband;
 857
 858                 il_init_band_reference(il, band, &eeprom_ch_count,
 859                                         &eeprom_ch_info, &eeprom_ch_idx);
 860
 861                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 862                 ieeeband =
 863                         (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 864
 865                 /* Loop through each band adding each of the channels */
 866                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 867                         /* Set up driver's info for lower half */
 868                         il_mod_ht40_chan_info(il, ieeeband,
 869                                                 eeprom_ch_idx[ch],
 870                                                 &eeprom_ch_info[ch],
 871                                                 IEEE80211_CHAN_NO_HT40PLUS);
 872
 873                         /* Set up driver's info for upper half */
 874                         il_mod_ht40_chan_info(il, ieeeband,
 875                                                 eeprom_ch_idx[ch] + 4,
 876                                                 &eeprom_ch_info[ch],
 877                                                 IEEE80211_CHAN_NO_HT40MINUS);
 878                 }
 879         }
 880
 881         return 0;
 882 }
 883 EXPORT_SYMBOL(il_init_channel_map);
 884
 885 /*
 886  * il_free_channel_map - undo allocations in il_init_channel_map
 887  */
 888 void il_free_channel_map(struct il_priv *il)
 889 {
 890         kfree(il->channel_info);
 891         il->channel_count = 0;
 892 }
 893 EXPORT_SYMBOL(il_free_channel_map);
 894
 895 /**
 896  * il_get_channel_info - Find driver's ilate channel info
 897  *
 898  * Based on band and channel number.
 899  */
 900 const struct
 901 il_channel_info *il_get_channel_info(const struct il_priv *il,
 902                                         enum ieee80211_band band, u16 channel)
 903 {
 904         int i;
 905
 906         switch (band) {
 907         case IEEE80211_BAND_5GHZ:
 908                 for (i = 14; i < il->channel_count; i++) {
 909                         if (il->channel_info[i].channel == channel)
 910                                 return &il->channel_info[i];
 911                 }
 912                 break;
 913         case IEEE80211_BAND_2GHZ:
 914                 if (channel >= 1 && channel <= 14)
 915                         return &il->channel_info[channel - 1];
 916                 break;
 917         default:
 918                 BUG();
 919         }
 920
 921         return NULL;
 922 }
 923 EXPORT_SYMBOL(il_get_channel_info);
 924
 925 /*
 926  * Setting power level allows the card to go to sleep when not busy.
 927  *
 928  * We calculate a sleep command based on the required latency, which
 929  * we get from mac80211. In order to handle thermal throttling, we can
 930  * also use pre-defined power levels.
 931  */
 932
 933 /*
 934  * This defines the old power levels. They are still used by default
 935  * (level 1) and for thermal throttle (levels 3 through 5)
 936  */
 937
 938 struct il_power_vec_entry {
 939         struct il_powertable_cmd cmd;
 940         u8 no_dtim;     /* number of skip dtim */
 941 };
 942
 943 static void il_power_sleep_cam_cmd(struct il_priv *il,
 944                                     struct il_powertable_cmd *cmd)
 945 {
 946         memset(cmd, 0, sizeof(*cmd));
 947
 948         if (il->power_data.pci_pm)
 949                 cmd->flags |= IL_POWER_PCI_PM_MSK;
 950
 951         D_POWER("Sleep command for CAM\n");
 952 }
 953
 954 static int
 955 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
 956 {
 957         D_POWER("Sending power/sleep command\n");
 958         D_POWER("Flags value = 0x%08X\n", cmd->flags);
 959         D_POWER("Tx timeout = %u\n",
 960                                         le32_to_cpu(cmd->tx_data_timeout));
 961         D_POWER("Rx timeout = %u\n",
 962                                         le32_to_cpu(cmd->rx_data_timeout));
 963         D_POWER(
 964                         "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
 965                         le32_to_cpu(cmd->sleep_interval[0]),
 966                         le32_to_cpu(cmd->sleep_interval[1]),
 967                         le32_to_cpu(cmd->sleep_interval[2]),
 968                         le32_to_cpu(cmd->sleep_interval[3]),
 969                         le32_to_cpu(cmd->sleep_interval[4]));
 970
 971         return il_send_cmd_pdu(il, C_POWER_TBL,
 972                                 sizeof(struct il_powertable_cmd), cmd);
 973 }
 974
 975 int
 976 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd,
 977                        bool force)
 978 {
 979         int ret;
 980         bool update_chains;
 981
 982         lockdep_assert_held(&il->mutex);
 983
 984         /* Don't update the RX chain when chain noise calibration is running */
 985         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
 986                         il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
 987
 988         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
 989                 return 0;
 990
 991         if (!il_is_ready_rf(il))
 992                 return -EIO;
 993
 994         /* scan complete use sleep_power_next, need to be updated */
 995         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
 996         if (test_bit(S_SCANNING, &il->status) && !force) {
 997                 D_INFO("Defer power set mode while scanning\n");
 998                 return 0;
 999         }
1000
1001         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1002                 set_bit(S_POWER_PMI, &il->status);
1003
1004         ret = il_set_power(il, cmd);
1005         if (!ret) {
1006                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1007                         clear_bit(S_POWER_PMI, &il->status);
1008
1009                 if (il->cfg->ops->lib->update_chain_flags && update_chains)
1010                         il->cfg->ops->lib->update_chain_flags(il);
1011                 else if (il->cfg->ops->lib->update_chain_flags)
1012                         D_POWER(
1013                                         "Cannot update the power, chain noise "
1014                                         "calibration running: %d\n",
1015                                         il->chain_noise_data.state);
1016
1017                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1018         } else
1019                 IL_ERR("set power fail, ret = %d", ret);
1020
1021         return ret;
1022 }
1023
1024 int il_power_update_mode(struct il_priv *il, bool force)
1025 {
1026         struct il_powertable_cmd cmd;
1027
1028         il_power_sleep_cam_cmd(il, &cmd);
1029         return il_power_set_mode(il, &cmd, force);
1030 }
1031 EXPORT_SYMBOL(il_power_update_mode);
1032
1033 /* initialize to default */
1034 void il_power_initialize(struct il_priv *il)
1035 {
1036         u16 lctl = il_pcie_link_ctl(il);
1037
1038         il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
1039
1040         il->power_data.debug_sleep_level_override = -1;
1041
1042         memset(&il->power_data.sleep_cmd, 0,
1043                 sizeof(il->power_data.sleep_cmd));
1044 }
1045 EXPORT_SYMBOL(il_power_initialize);
1046
1047 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1048  * sending probe req.  This should be set long enough to hear probe responses
1049  * from more than one AP.  */
1050 #define IL_ACTIVE_DWELL_TIME_24    (30)       /* all times in msec */
1051 #define IL_ACTIVE_DWELL_TIME_52    (20)
1052
1053 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1054 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1055
1056 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1057  * Must be set longer than active dwell time.
1058  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1059 #define IL_PASSIVE_DWELL_TIME_24   (20)       /* all times in msec */
1060 #define IL_PASSIVE_DWELL_TIME_52   (10)
1061 #define IL_PASSIVE_DWELL_BASE      (100)
1062 #define IL_CHANNEL_TUNE_TIME       5
1063
1064 static int il_send_scan_abort(struct il_priv *il)
1065 {
1066         int ret;
1067         struct il_rx_pkt *pkt;
1068         struct il_host_cmd cmd = {
1069                 .id = C_SCAN_ABORT,
1070                 .flags = CMD_WANT_SKB,
1071         };
1072
1073         /* Exit instantly with error when device is not ready
1074          * to receive scan abort command or it does not perform
1075          * hardware scan currently */
1076         if (!test_bit(S_READY, &il->status) ||
1077             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1078             !test_bit(S_SCAN_HW, &il->status) ||
1079             test_bit(S_FW_ERROR, &il->status) ||
1080             test_bit(S_EXIT_PENDING, &il->status))
1081                 return -EIO;
1082
1083         ret = il_send_cmd_sync(il, &cmd);
1084         if (ret)
1085                 return ret;
1086
1087         pkt = (struct il_rx_pkt *)cmd.reply_page;
1088         if (pkt->u.status != CAN_ABORT_STATUS) {
1089                 /* The scan abort will return 1 for success or
1090                  * 2 for "failure".  A failure condition can be
1091                  * due to simply not being in an active scan which
1092                  * can occur if we send the scan abort before we
1093                  * the microcode has notified us that a scan is
1094                  * completed. */
1095                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1096                 ret = -EIO;
1097         }
1098
1099         il_free_pages(il, cmd.reply_page);
1100         return ret;
1101 }
1102
1103 static void il_complete_scan(struct il_priv *il, bool aborted)
1104 {
1105         /* check if scan was requested from mac80211 */
1106         if (il->scan_request) {
1107                 D_SCAN("Complete scan in mac80211\n");
1108                 ieee80211_scan_completed(il->hw, aborted);
1109         }
1110
1111         il->scan_vif = NULL;
1112         il->scan_request = NULL;
1113 }
1114
1115 void il_force_scan_end(struct il_priv *il)
1116 {
1117         lockdep_assert_held(&il->mutex);
1118
1119         if (!test_bit(S_SCANNING, &il->status)) {
1120                 D_SCAN("Forcing scan end while not scanning\n");
1121                 return;
1122         }
1123
1124         D_SCAN("Forcing scan end\n");
1125         clear_bit(S_SCANNING, &il->status);
1126         clear_bit(S_SCAN_HW, &il->status);
1127         clear_bit(S_SCAN_ABORTING, &il->status);
1128         il_complete_scan(il, true);
1129 }
1130
1131 static void il_do_scan_abort(struct il_priv *il)
1132 {
1133         int ret;
1134
1135         lockdep_assert_held(&il->mutex);
1136
1137         if (!test_bit(S_SCANNING, &il->status)) {
1138                 D_SCAN("Not performing scan to abort\n");
1139                 return;
1140         }
1141
1142         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1143                 D_SCAN("Scan abort in progress\n");
1144                 return;
1145         }
1146
1147         ret = il_send_scan_abort(il);
1148         if (ret) {
1149                 D_SCAN("Send scan abort failed %d\n", ret);
1150                 il_force_scan_end(il);
1151         } else
1152                 D_SCAN("Successfully send scan abort\n");
1153 }
1154
1155 /**
1156  * il_scan_cancel - Cancel any currently executing HW scan
1157  */
1158 int il_scan_cancel(struct il_priv *il)
1159 {
1160         D_SCAN("Queuing abort scan\n");
1161         queue_work(il->workqueue, &il->abort_scan);
1162         return 0;
1163 }
1164 EXPORT_SYMBOL(il_scan_cancel);
1165
1166 /**
1167  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1168  * @ms: amount of time to wait (in milliseconds) for scan to abort
1169  *
1170  */
1171 int il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1172 {
1173         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1174
1175         lockdep_assert_held(&il->mutex);
1176
1177         D_SCAN("Scan cancel timeout\n");
1178
1179         il_do_scan_abort(il);
1180
1181         while (time_before_eq(jiffies, timeout)) {
1182                 if (!test_bit(S_SCAN_HW, &il->status))
1183                         break;
1184                 msleep(20);
1185         }
1186
1187         return test_bit(S_SCAN_HW, &il->status);
1188 }
1189 EXPORT_SYMBOL(il_scan_cancel_timeout);
1190
1191 /* Service response to C_SCAN (0x80) */
1192 static void il_hdl_scan(struct il_priv *il,
1193                               struct il_rx_buf *rxb)
1194 {
1195 #ifdef CONFIG_IWLEGACY_DEBUG
1196         struct il_rx_pkt *pkt = rxb_addr(rxb);
1197         struct il_scanreq_notification *notif =
1198             (struct il_scanreq_notification *)pkt->u.raw;
1199
1200         D_SCAN("Scan request status = 0x%x\n", notif->status);
1201 #endif
1202 }
1203
1204 /* Service N_SCAN_START (0x82) */
1205 static void il_hdl_scan_start(struct il_priv *il,
1206                                     struct il_rx_buf *rxb)
1207 {
1208         struct il_rx_pkt *pkt = rxb_addr(rxb);
1209         struct il_scanstart_notification *notif =
1210             (struct il_scanstart_notification *)pkt->u.raw;
1211         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1212         D_SCAN("Scan start: "
1213                        "%d [802.11%s] "
1214                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
1215                        notif->channel,
1216                        notif->band ? "bg" : "a",
1217                        le32_to_cpu(notif->tsf_high),
1218                        le32_to_cpu(notif->tsf_low),
1219                        notif->status, notif->beacon_timer);
1220 }
1221
1222 /* Service N_SCAN_RESULTS (0x83) */
1223 static void il_hdl_scan_results(struct il_priv *il,
1224                                       struct il_rx_buf *rxb)
1225 {
1226 #ifdef CONFIG_IWLEGACY_DEBUG
1227         struct il_rx_pkt *pkt = rxb_addr(rxb);
1228         struct il_scanresults_notification *notif =
1229             (struct il_scanresults_notification *)pkt->u.raw;
1230
1231         D_SCAN("Scan ch.res: "
1232                        "%d [802.11%s] "
1233                        "(TSF: 0x%08X:%08X) - %d "
1234                        "elapsed=%lu usec\n",
1235                        notif->channel,
1236                        notif->band ? "bg" : "a",
1237                        le32_to_cpu(notif->tsf_high),
1238                        le32_to_cpu(notif->tsf_low),
1239                        le32_to_cpu(notif->stats[0]),
1240                        le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1241 #endif
1242 }
1243
1244 /* Service N_SCAN_COMPLETE (0x84) */
1245 static void il_hdl_scan_complete(struct il_priv *il,
1246                                        struct il_rx_buf *rxb)
1247 {
1248
1249 #ifdef CONFIG_IWLEGACY_DEBUG
1250         struct il_rx_pkt *pkt = rxb_addr(rxb);
1251         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1252 #endif
1253
1254         D_SCAN(
1255                         "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1256                        scan_notif->scanned_channels,
1257                        scan_notif->tsf_low,
1258                        scan_notif->tsf_high, scan_notif->status);
1259
1260         /* The HW is no longer scanning */
1261         clear_bit(S_SCAN_HW, &il->status);
1262
1263         D_SCAN("Scan on %sGHz took %dms\n",
1264                        (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1265                        jiffies_to_msecs(jiffies - il->scan_start));
1266
1267         queue_work(il->workqueue, &il->scan_completed);
1268 }
1269
1270 void il_setup_rx_scan_handlers(struct il_priv *il)
1271 {
1272         /* scan handlers */
1273         il->handlers[C_SCAN] = il_hdl_scan;
1274         il->handlers[N_SCAN_START] =
1275                                         il_hdl_scan_start;
1276         il->handlers[N_SCAN_RESULTS] =
1277                                         il_hdl_scan_results;
1278         il->handlers[N_SCAN_COMPLETE] =
1279                                         il_hdl_scan_complete;
1280 }
1281 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1282
1283 inline u16 il_get_active_dwell_time(struct il_priv *il,
1284                                      enum ieee80211_band band,
1285                                      u8 n_probes)
1286 {
1287         if (band == IEEE80211_BAND_5GHZ)
1288                 return IL_ACTIVE_DWELL_TIME_52 +
1289                         IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1290         else
1291                 return IL_ACTIVE_DWELL_TIME_24 +
1292                         IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1293 }
1294 EXPORT_SYMBOL(il_get_active_dwell_time);
1295
1296 u16 il_get_passive_dwell_time(struct il_priv *il,
1297                                enum ieee80211_band band,
1298                                struct ieee80211_vif *vif)
1299 {
1300         struct il_rxon_context *ctx = &il->ctx;
1301         u16 value;
1302
1303         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
1304             IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_24 :
1305             IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_52;
1306
1307         if (il_is_any_associated(il)) {
1308                 /*
1309                  * If we're associated, we clamp the maximum passive
1310                  * dwell time to be 98% of the smallest beacon interval
1311                  * (minus 2 * channel tune time)
1312                  */
1313                 value = ctx->vif ? ctx->vif->bss_conf.beacon_int : 0;
1314                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1315                         value = IL_PASSIVE_DWELL_BASE;
1316                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1317                 passive = min(value, passive);
1318         }
1319
1320         return passive;
1321 }
1322 EXPORT_SYMBOL(il_get_passive_dwell_time);
1323
1324 void il_init_scan_params(struct il_priv *il)
1325 {
1326         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1327         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1328                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1329         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1330                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1331 }
1332 EXPORT_SYMBOL(il_init_scan_params);
1333
1334 static int il_scan_initiate(struct il_priv *il,
1335                                     struct ieee80211_vif *vif)
1336 {
1337         int ret;
1338
1339         lockdep_assert_held(&il->mutex);
1340
1341         if (WARN_ON(!il->cfg->ops->utils->request_scan))
1342                 return -EOPNOTSUPP;
1343
1344         cancel_delayed_work(&il->scan_check);
1345
1346         if (!il_is_ready_rf(il)) {
1347                 IL_WARN("Request scan called when driver not ready.\n");
1348                 return -EIO;
1349         }
1350
1351         if (test_bit(S_SCAN_HW, &il->status)) {
1352                 D_SCAN(
1353                         "Multiple concurrent scan requests in parallel.\n");
1354                 return -EBUSY;
1355         }
1356
1357         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1358                 D_SCAN("Scan request while abort pending.\n");
1359                 return -EBUSY;
1360         }
1361
1362         D_SCAN("Starting scan...\n");
1363
1364         set_bit(S_SCANNING, &il->status);
1365         il->scan_start = jiffies;
1366
1367         ret = il->cfg->ops->utils->request_scan(il, vif);
1368         if (ret) {
1369                 clear_bit(S_SCANNING, &il->status);
1370                 return ret;
1371         }
1372
1373         queue_delayed_work(il->workqueue, &il->scan_check,
1374                            IL_SCAN_CHECK_WATCHDOG);
1375
1376         return 0;
1377 }
1378
1379 int il_mac_hw_scan(struct ieee80211_hw *hw,
1380                     struct ieee80211_vif *vif,
1381                     struct cfg80211_scan_request *req)
1382 {
1383         struct il_priv *il = hw->priv;
1384         int ret;
1385
1386         D_MAC80211("enter\n");
1387
1388         if (req->n_channels == 0)
1389                 return -EINVAL;
1390
1391         mutex_lock(&il->mutex);
1392
1393         if (test_bit(S_SCANNING, &il->status)) {
1394                 D_SCAN("Scan already in progress.\n");
1395                 ret = -EAGAIN;
1396                 goto out_unlock;
1397         }
1398
1399         /* mac80211 will only ask for one band at a time */
1400         il->scan_request = req;
1401         il->scan_vif = vif;
1402         il->scan_band = req->channels[0]->band;
1403
1404         ret = il_scan_initiate(il, vif);
1405
1406         D_MAC80211("leave\n");
1407
1408 out_unlock:
1409         mutex_unlock(&il->mutex);
1410
1411         return ret;
1412 }
1413 EXPORT_SYMBOL(il_mac_hw_scan);
1414
1415 static void il_bg_scan_check(struct work_struct *data)
1416 {
1417         struct il_priv *il =
1418             container_of(data, struct il_priv, scan_check.work);
1419
1420         D_SCAN("Scan check work\n");
1421
1422         /* Since we are here firmware does not finish scan and
1423          * most likely is in bad shape, so we don't bother to
1424          * send abort command, just force scan complete to mac80211 */
1425         mutex_lock(&il->mutex);
1426         il_force_scan_end(il);
1427         mutex_unlock(&il->mutex);
1428 }
1429
1430 /**
1431  * il_fill_probe_req - fill in all required fields and IE for probe request
1432  */
1433
1434 u16
1435 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1436                        const u8 *ta, const u8 *ies, int ie_len, int left)
1437 {
1438         int len = 0;
1439         u8 *pos = NULL;
1440
1441         /* Make sure there is enough space for the probe request,
1442          * two mandatory IEs and the data */
1443         left -= 24;
1444         if (left < 0)
1445                 return 0;
1446
1447         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1448         memcpy(frame->da, il_bcast_addr, ETH_ALEN);
1449         memcpy(frame->sa, ta, ETH_ALEN);
1450         memcpy(frame->bssid, il_bcast_addr, ETH_ALEN);
1451         frame->seq_ctrl = 0;
1452
1453         len += 24;
1454
1455         /* ...next IE... */
1456         pos = &frame->u.probe_req.variable[0];
1457
1458         /* fill in our indirect SSID IE */
1459         left -= 2;
1460         if (left < 0)
1461                 return 0;
1462         *pos++ = WLAN_EID_SSID;
1463         *pos++ = 0;
1464
1465         len += 2;
1466
1467         if (WARN_ON(left < ie_len))
1468                 return len;
1469
1470         if (ies && ie_len) {
1471                 memcpy(pos, ies, ie_len);
1472                 len += ie_len;
1473         }
1474
1475         return (u16)len;
1476 }
1477 EXPORT_SYMBOL(il_fill_probe_req);
1478
1479 static void il_bg_abort_scan(struct work_struct *work)
1480 {
1481         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1482
1483         D_SCAN("Abort scan work\n");
1484
1485         /* We keep scan_check work queued in case when firmware will not
1486          * report back scan completed notification */
1487         mutex_lock(&il->mutex);
1488         il_scan_cancel_timeout(il, 200);
1489         mutex_unlock(&il->mutex);
1490 }
1491
1492 static void il_bg_scan_completed(struct work_struct *work)
1493 {
1494         struct il_priv *il =
1495             container_of(work, struct il_priv, scan_completed);
1496         bool aborted;
1497
1498         D_SCAN("Completed scan.\n");
1499
1500         cancel_delayed_work(&il->scan_check);
1501
1502         mutex_lock(&il->mutex);
1503
1504         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1505         if (aborted)
1506                 D_SCAN("Aborted scan completed.\n");
1507
1508         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1509                 D_SCAN("Scan already completed.\n");
1510                 goto out_settings;
1511         }
1512
1513         il_complete_scan(il, aborted);
1514
1515 out_settings:
1516         /* Can we still talk to firmware ? */
1517         if (!il_is_ready_rf(il))
1518                 goto out;
1519
1520         /*
1521          * We do not commit power settings while scan is pending,
1522          * do it now if the settings changed.
1523          */
1524         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1525         il_set_tx_power(il, il->tx_power_next, false);
1526
1527         il->cfg->ops->utils->post_scan(il);
1528
1529 out:
1530         mutex_unlock(&il->mutex);
1531 }
1532
1533 void il_setup_scan_deferred_work(struct il_priv *il)
1534 {
1535         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1536         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1537         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1538 }
1539 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1540
1541 void il_cancel_scan_deferred_work(struct il_priv *il)
1542 {
1543         cancel_work_sync(&il->abort_scan);
1544         cancel_work_sync(&il->scan_completed);
1545
1546         if (cancel_delayed_work_sync(&il->scan_check)) {
1547                 mutex_lock(&il->mutex);
1548                 il_force_scan_end(il);
1549                 mutex_unlock(&il->mutex);
1550         }
1551 }
1552 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1553
1554 /* il->sta_lock must be held */
1555 static void il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1556 {
1557
1558         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1559                 IL_ERR(
1560                         "ACTIVATE a non DRIVER active station id %u addr %pM\n",
1561                         sta_id, il->stations[sta_id].sta.sta.addr);
1562
1563         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1564                 D_ASSOC(
1565                         "STA id %u addr %pM already present"
1566                         " in uCode (according to driver)\n",
1567                         sta_id, il->stations[sta_id].sta.sta.addr);
1568         } else {
1569                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1570                 D_ASSOC("Added STA id %u addr %pM to uCode\n",
1571                                 sta_id, il->stations[sta_id].sta.sta.addr);
1572         }
1573 }
1574
1575 static int il_process_add_sta_resp(struct il_priv *il,
1576                                     struct il_addsta_cmd *addsta,
1577                                     struct il_rx_pkt *pkt,
1578                                     bool sync)
1579 {
1580         u8 sta_id = addsta->sta.sta_id;
1581         unsigned long flags;
1582         int ret = -EIO;
1583
1584         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1585                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n",
1586                         pkt->hdr.flags);
1587                 return ret;
1588         }
1589
1590         D_INFO("Processing response for adding station %u\n",
1591                        sta_id);
1592
1593         spin_lock_irqsave(&il->sta_lock, flags);
1594
1595         switch (pkt->u.add_sta.status) {
1596         case ADD_STA_SUCCESS_MSK:
1597                 D_INFO("C_ADD_STA PASSED\n");
1598                 il_sta_ucode_activate(il, sta_id);
1599                 ret = 0;
1600                 break;
1601         case ADD_STA_NO_ROOM_IN_TBL:
1602                 IL_ERR("Adding station %d failed, no room in table.\n",
1603                         sta_id);
1604                 break;
1605         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1606                 IL_ERR(
1607                         "Adding station %d failed, no block ack resource.\n",
1608                         sta_id);
1609                 break;
1610         case ADD_STA_MODIFY_NON_EXIST_STA:
1611                 IL_ERR("Attempting to modify non-existing station %d\n",
1612                         sta_id);
1613                 break;
1614         default:
1615                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n",
1616                                 pkt->u.add_sta.status);
1617                 break;
1618         }
1619
1620         D_INFO("%s station id %u addr %pM\n",
1621                        il->stations[sta_id].sta.mode ==
1622                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
1623                        sta_id, il->stations[sta_id].sta.sta.addr);
1624
1625         /*
1626          * XXX: The MAC address in the command buffer is often changed from
1627          * the original sent to the device. That is, the MAC address
1628          * written to the command buffer often is not the same MAC address
1629          * read from the command buffer when the command returns. This
1630          * issue has not yet been resolved and this debugging is left to
1631          * observe the problem.
1632          */
1633         D_INFO("%s station according to cmd buffer %pM\n",
1634                        il->stations[sta_id].sta.mode ==
1635                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
1636                        addsta->sta.addr);
1637         spin_unlock_irqrestore(&il->sta_lock, flags);
1638
1639         return ret;
1640 }
1641
1642 static void il_add_sta_callback(struct il_priv *il,
1643                                  struct il_device_cmd *cmd,
1644                                  struct il_rx_pkt *pkt)
1645 {
1646         struct il_addsta_cmd *addsta =
1647                 (struct il_addsta_cmd *)cmd->cmd.payload;
1648
1649         il_process_add_sta_resp(il, addsta, pkt, false);
1650
1651 }
1652
1653 int il_send_add_sta(struct il_priv *il,
1654                      struct il_addsta_cmd *sta, u8 flags)
1655 {
1656         struct il_rx_pkt *pkt = NULL;
1657         int ret = 0;
1658         u8 data[sizeof(*sta)];
1659         struct il_host_cmd cmd = {
1660                 .id = C_ADD_STA,
1661                 .flags = flags,
1662                 .data = data,
1663         };
1664         u8 sta_id __maybe_unused = sta->sta.sta_id;
1665
1666         D_INFO("Adding sta %u (%pM) %ssynchronously\n",
1667                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
1668
1669         if (flags & CMD_ASYNC)
1670                 cmd.callback = il_add_sta_callback;
1671         else {
1672                 cmd.flags |= CMD_WANT_SKB;
1673                 might_sleep();
1674         }
1675
1676         cmd.len = il->cfg->ops->utils->build_addsta_hcmd(sta, data);
1677         ret = il_send_cmd(il, &cmd);
1678
1679         if (ret || (flags & CMD_ASYNC))
1680                 return ret;
1681
1682         if (ret == 0) {
1683                 pkt = (struct il_rx_pkt *)cmd.reply_page;
1684                 ret = il_process_add_sta_resp(il, sta, pkt, true);
1685         }
1686         il_free_pages(il, cmd.reply_page);
1687
1688         return ret;
1689 }
1690 EXPORT_SYMBOL(il_send_add_sta);
1691
1692 static void il_set_ht_add_station(struct il_priv *il, u8 idx,
1693                                    struct ieee80211_sta *sta,
1694                                    struct il_rxon_context *ctx)
1695 {
1696         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1697         __le32 sta_flags;
1698         u8 mimo_ps_mode;
1699
1700         if (!sta || !sta_ht_inf->ht_supported)
1701                 goto done;
1702
1703         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
1704         D_ASSOC("spatial multiplexing power save mode: %s\n",
1705                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
1706                         "static" :
1707                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
1708                         "dynamic" : "disabled");
1709
1710         sta_flags = il->stations[idx].sta.station_flags;
1711
1712         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1713
1714         switch (mimo_ps_mode) {
1715         case WLAN_HT_CAP_SM_PS_STATIC:
1716                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1717                 break;
1718         case WLAN_HT_CAP_SM_PS_DYNAMIC:
1719                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1720                 break;
1721         case WLAN_HT_CAP_SM_PS_DISABLED:
1722                 break;
1723         default:
1724                 IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode);
1725                 break;
1726         }
1727
1728         sta_flags |= cpu_to_le32(
1729               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1730
1731         sta_flags |= cpu_to_le32(
1732               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1733
1734         if (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap))
1735                 sta_flags |= STA_FLG_HT40_EN_MSK;
1736         else
1737                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1738
1739         il->stations[idx].sta.station_flags = sta_flags;
1740  done:
1741         return;
1742 }
1743
1744 /**
1745  * il_prep_station - Prepare station information for addition
1746  *
1747  * should be called with sta_lock held
1748  */
1749 u8 il_prep_station(struct il_priv *il, struct il_rxon_context *ctx,
1750                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
1751 {
1752         struct il_station_entry *station;
1753         int i;
1754         u8 sta_id = IL_INVALID_STATION;
1755         u16 rate;
1756
1757         if (is_ap)
1758                 sta_id = ctx->ap_sta_id;
1759         else if (is_broadcast_ether_addr(addr))
1760                 sta_id = ctx->bcast_sta_id;
1761         else
1762                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1763                         if (!compare_ether_addr(il->stations[i].sta.sta.addr,
1764                                                 addr)) {
1765                                 sta_id = i;
1766                                 break;
1767                         }
1768
1769                         if (!il->stations[i].used &&
1770                             sta_id == IL_INVALID_STATION)
1771                                 sta_id = i;
1772                 }
1773
1774         /*
1775          * These two conditions have the same outcome, but keep them
1776          * separate
1777          */
1778         if (unlikely(sta_id == IL_INVALID_STATION))
1779                 return sta_id;
1780
1781         /*
1782          * uCode is not able to deal with multiple requests to add a
1783          * station. Keep track if one is in progress so that we do not send
1784          * another.
1785          */
1786         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1787                 D_INFO(
1788                                 "STA %d already in process of being added.\n",
1789                                 sta_id);
1790                 return sta_id;
1791         }
1792
1793         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1794             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1795             !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) {
1796                 D_ASSOC(
1797                                 "STA %d (%pM) already added, not adding again.\n",
1798                                 sta_id, addr);
1799                 return sta_id;
1800         }
1801
1802         station = &il->stations[sta_id];
1803         station->used = IL_STA_DRIVER_ACTIVE;
1804         D_ASSOC("Add STA to driver ID %d: %pM\n",
1805                         sta_id, addr);
1806         il->num_stations++;
1807
1808         /* Set up the C_ADD_STA command to send to device */
1809         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1810         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1811         station->sta.mode = 0;
1812         station->sta.sta.sta_id = sta_id;
1813         station->sta.station_flags = ctx->station_flags;
1814         station->ctxid = ctx->ctxid;
1815
1816         if (sta) {
1817                 struct il_station_priv_common *sta_priv;
1818
1819                 sta_priv = (void *)sta->drv_priv;
1820                 sta_priv->ctx = ctx;
1821         }
1822
1823         /*
1824          * OK to call unconditionally, since local stations (IBSS BSSID
1825          * STA and broadcast STA) pass in a NULL sta, and mac80211
1826          * doesn't allow HT IBSS.
1827          */
1828         il_set_ht_add_station(il, sta_id, sta, ctx);
1829
1830         /* 3945 only */
1831         rate = (il->band == IEEE80211_BAND_5GHZ) ?
1832                 RATE_6M_PLCP : RATE_1M_PLCP;
1833         /* Turn on both antennas for the station... */
1834         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1835
1836         return sta_id;
1837
1838 }
1839 EXPORT_SYMBOL_GPL(il_prep_station);
1840
1841 #define STA_WAIT_TIMEOUT (HZ/2)
1842
1843 /**
1844  * il_add_station_common -
1845  */
1846 int
1847 il_add_station_common(struct il_priv *il,
1848                         struct il_rxon_context *ctx,
1849                            const u8 *addr, bool is_ap,
1850                            struct ieee80211_sta *sta, u8 *sta_id_r)
1851 {
1852         unsigned long flags_spin;
1853         int ret = 0;
1854         u8 sta_id;
1855         struct il_addsta_cmd sta_cmd;
1856
1857         *sta_id_r = 0;
1858         spin_lock_irqsave(&il->sta_lock, flags_spin);
1859         sta_id = il_prep_station(il, ctx, addr, is_ap, sta);
1860         if (sta_id == IL_INVALID_STATION) {
1861                 IL_ERR("Unable to prepare station %pM for addition\n",
1862                         addr);
1863                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1864                 return -EINVAL;
1865         }
1866
1867         /*
1868          * uCode is not able to deal with multiple requests to add a
1869          * station. Keep track if one is in progress so that we do not send
1870          * another.
1871          */
1872         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1873                 D_INFO(
1874                         "STA %d already in process of being added.\n",
1875                        sta_id);
1876                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1877                 return -EEXIST;
1878         }
1879
1880         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1881             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
1882                 D_ASSOC(
1883                         "STA %d (%pM) already added, not adding again.\n",
1884                         sta_id, addr);
1885                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1886                 return -EEXIST;
1887         }
1888
1889         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
1890         memcpy(&sta_cmd, &il->stations[sta_id].sta,
1891                                 sizeof(struct il_addsta_cmd));
1892         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1893
1894         /* Add station to device's station table */
1895         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
1896         if (ret) {
1897                 spin_lock_irqsave(&il->sta_lock, flags_spin);
1898                 IL_ERR("Adding station %pM failed.\n",
1899                         il->stations[sta_id].sta.sta.addr);
1900                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
1901                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
1902                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1903         }
1904         *sta_id_r = sta_id;
1905         return ret;
1906 }
1907 EXPORT_SYMBOL(il_add_station_common);
1908
1909 /**
1910  * il_sta_ucode_deactivate - deactivate ucode status for a station
1911  *
1912  * il->sta_lock must be held
1913  */
1914 static void il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
1915 {
1916         /* Ucode must be active and driver must be non active */
1917         if ((il->stations[sta_id].used &
1918              (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
1919                                                 IL_STA_UCODE_ACTIVE)
1920                 IL_ERR("removed non active STA %u\n", sta_id);
1921
1922         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
1923
1924         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
1925         D_ASSOC("Removed STA %u\n", sta_id);
1926 }
1927
1928 static int il_send_remove_station(struct il_priv *il,
1929                                    const u8 *addr, int sta_id,
1930                                    bool temporary)
1931 {
1932         struct il_rx_pkt *pkt;
1933         int ret;
1934
1935         unsigned long flags_spin;
1936         struct il_rem_sta_cmd rm_sta_cmd;
1937
1938         struct il_host_cmd cmd = {
1939                 .id = C_REM_STA,
1940                 .len = sizeof(struct il_rem_sta_cmd),
1941                 .flags = CMD_SYNC,
1942                 .data = &rm_sta_cmd,
1943         };
1944
1945         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
1946         rm_sta_cmd.num_sta = 1;
1947         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
1948
1949         cmd.flags |= CMD_WANT_SKB;
1950
1951         ret = il_send_cmd(il, &cmd);
1952
1953         if (ret)
1954                 return ret;
1955
1956         pkt = (struct il_rx_pkt *)cmd.reply_page;
1957         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1958                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n",
1959                           pkt->hdr.flags);
1960                 ret = -EIO;
1961         }
1962
1963         if (!ret) {
1964                 switch (pkt->u.rem_sta.status) {
1965                 case REM_STA_SUCCESS_MSK:
1966                         if (!temporary) {
1967                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
1968                                 il_sta_ucode_deactivate(il, sta_id);
1969                                 spin_unlock_irqrestore(&il->sta_lock,
1970                                                                 flags_spin);
1971                         }
1972                         D_ASSOC("C_REM_STA PASSED\n");
1973                         break;
1974                 default:
1975                         ret = -EIO;
1976                         IL_ERR("C_REM_STA failed\n");
1977                         break;
1978                 }
1979         }
1980         il_free_pages(il, cmd.reply_page);
1981
1982         return ret;
1983 }
1984
1985 /**
1986  * il_remove_station - Remove driver's knowledge of station.
1987  */
1988 int il_remove_station(struct il_priv *il, const u8 sta_id,
1989                        const u8 *addr)
1990 {
1991         unsigned long flags;
1992
1993         if (!il_is_ready(il)) {
1994                 D_INFO(
1995                         "Unable to remove station %pM, device not ready.\n",
1996                         addr);
1997                 /*
1998                  * It is typical for stations to be removed when we are
1999                  * going down. Return success since device will be down
2000                  * soon anyway
2001                  */
2002                 return 0;
2003         }
2004
2005         D_ASSOC("Removing STA from driver:%d  %pM\n",
2006                         sta_id, addr);
2007
2008         if (WARN_ON(sta_id == IL_INVALID_STATION))
2009                 return -EINVAL;
2010
2011         spin_lock_irqsave(&il->sta_lock, flags);
2012
2013         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2014                 D_INFO("Removing %pM but non DRIVER active\n",
2015                                 addr);
2016                 goto out_err;
2017         }
2018
2019         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2020                 D_INFO("Removing %pM but non UCODE active\n",
2021                                 addr);
2022                 goto out_err;
2023         }
2024
2025         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2026                 kfree(il->stations[sta_id].lq);
2027                 il->stations[sta_id].lq = NULL;
2028         }
2029
2030         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2031
2032         il->num_stations--;
2033
2034         BUG_ON(il->num_stations < 0);
2035
2036         spin_unlock_irqrestore(&il->sta_lock, flags);
2037
2038         return il_send_remove_station(il, addr, sta_id, false);
2039 out_err:
2040         spin_unlock_irqrestore(&il->sta_lock, flags);
2041         return -EINVAL;
2042 }
2043 EXPORT_SYMBOL_GPL(il_remove_station);
2044
2045 /**
2046  * il_clear_ucode_stations - clear ucode station table bits
2047  *
2048  * This function clears all the bits in the driver indicating
2049  * which stations are active in the ucode. Call when something
2050  * other than explicit station management would cause this in
2051  * the ucode, e.g. unassociated RXON.
2052  */
2053 void il_clear_ucode_stations(struct il_priv *il,
2054                               struct il_rxon_context *ctx)
2055 {
2056         int i;
2057         unsigned long flags_spin;
2058         bool cleared = false;
2059
2060         D_INFO("Clearing ucode stations in driver\n");
2061
2062         spin_lock_irqsave(&il->sta_lock, flags_spin);
2063         for (i = 0; i < il->hw_params.max_stations; i++) {
2064                 if (ctx && ctx->ctxid != il->stations[i].ctxid)
2065                         continue;
2066
2067                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2068                         D_INFO(
2069                                 "Clearing ucode active for station %d\n", i);
2070                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2071                         cleared = true;
2072                 }
2073         }
2074         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2075
2076         if (!cleared)
2077                 D_INFO(
2078                         "No active stations found to be cleared\n");
2079 }
2080 EXPORT_SYMBOL(il_clear_ucode_stations);
2081
2082 /**
2083  * il_restore_stations() - Restore driver known stations to device
2084  *
2085  * All stations considered active by driver, but not present in ucode, is
2086  * restored.
2087  *
2088  * Function sleeps.
2089  */
2090 void
2091 il_restore_stations(struct il_priv *il, struct il_rxon_context *ctx)
2092 {
2093         struct il_addsta_cmd sta_cmd;
2094         struct il_link_quality_cmd lq;
2095         unsigned long flags_spin;
2096         int i;
2097         bool found = false;
2098         int ret;
2099         bool send_lq;
2100
2101         if (!il_is_ready(il)) {
2102                 D_INFO(
2103                         "Not ready yet, not restoring any stations.\n");
2104                 return;
2105         }
2106
2107         D_ASSOC("Restoring all known stations ... start.\n");
2108         spin_lock_irqsave(&il->sta_lock, flags_spin);
2109         for (i = 0; i < il->hw_params.max_stations; i++) {
2110                 if (ctx->ctxid != il->stations[i].ctxid)
2111                         continue;
2112                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2113                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2114                         D_ASSOC("Restoring sta %pM\n",
2115                                         il->stations[i].sta.sta.addr);
2116                         il->stations[i].sta.mode = 0;
2117                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2118                         found = true;
2119                 }
2120         }
2121
2122         for (i = 0; i < il->hw_params.max_stations; i++) {
2123                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2124                         memcpy(&sta_cmd, &il->stations[i].sta,
2125                                sizeof(struct il_addsta_cmd));
2126                         send_lq = false;
2127                         if (il->stations[i].lq) {
2128                                 memcpy(&lq, il->stations[i].lq,
2129                                        sizeof(struct il_link_quality_cmd));
2130                                 send_lq = true;
2131                         }
2132                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2133                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2134                         if (ret) {
2135                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2136                                 IL_ERR("Adding station %pM failed.\n",
2137                                         il->stations[i].sta.sta.addr);
2138                                 il->stations[i].used &=
2139                                                 ~IL_STA_DRIVER_ACTIVE;
2140                                 il->stations[i].used &=
2141                                                 ~IL_STA_UCODE_INPROGRESS;
2142                                 spin_unlock_irqrestore(&il->sta_lock,
2143                                                                 flags_spin);
2144                         }
2145                         /*
2146                          * Rate scaling has already been initialized, send
2147                          * current LQ command
2148                          */
2149                         if (send_lq)
2150                                 il_send_lq_cmd(il, ctx, &lq,
2151                                                                 CMD_SYNC, true);
2152                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2153                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2154                 }
2155         }
2156
2157         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2158         if (!found)
2159                 D_INFO("Restoring all known stations"
2160                                 " .... no stations to be restored.\n");
2161         else
2162                 D_INFO("Restoring all known stations"
2163                                 " .... complete.\n");
2164 }
2165 EXPORT_SYMBOL(il_restore_stations);
2166
2167 int il_get_free_ucode_key_idx(struct il_priv *il)
2168 {
2169         int i;
2170
2171         for (i = 0; i < il->sta_key_max_num; i++)
2172                 if (!test_and_set_bit(i, &il->ucode_key_table))
2173                         return i;
2174
2175         return WEP_INVALID_OFFSET;
2176 }
2177 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2178
2179 void il_dealloc_bcast_stations(struct il_priv *il)
2180 {
2181         unsigned long flags;
2182         int i;
2183
2184         spin_lock_irqsave(&il->sta_lock, flags);
2185         for (i = 0; i < il->hw_params.max_stations; i++) {
2186                 if (!(il->stations[i].used & IL_STA_BCAST))
2187                         continue;
2188
2189                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2190                 il->num_stations--;
2191                 BUG_ON(il->num_stations < 0);
2192                 kfree(il->stations[i].lq);
2193                 il->stations[i].lq = NULL;
2194         }
2195         spin_unlock_irqrestore(&il->sta_lock, flags);
2196 }
2197 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2198
2199 #ifdef CONFIG_IWLEGACY_DEBUG
2200 static void il_dump_lq_cmd(struct il_priv *il,
2201                            struct il_link_quality_cmd *lq)
2202 {
2203         int i;
2204         D_RATE("lq station id 0x%x\n", lq->sta_id);
2205         D_RATE("lq ant 0x%X 0x%X\n",
2206                        lq->general_params.single_stream_ant_msk,
2207                        lq->general_params.dual_stream_ant_msk);
2208
2209         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2210                 D_RATE("lq idx %d 0x%X\n",
2211                                i, lq->rs_table[i].rate_n_flags);
2212 }
2213 #else
2214 static inline void il_dump_lq_cmd(struct il_priv *il,
2215                                    struct il_link_quality_cmd *lq)
2216 {
2217 }
2218 #endif
2219
2220 /**
2221  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2222  *
2223  * It sometimes happens when a HT rate has been in use and we
2224  * loose connectivity with AP then mac80211 will first tell us that the
2225  * current channel is not HT anymore before removing the station. In such a
2226  * scenario the RXON flags will be updated to indicate we are not
2227  * communicating HT anymore, but the LQ command may still contain HT rates.
2228  * Test for this to prevent driver from sending LQ command between the time
2229  * RXON flags are updated and when LQ command is updated.
2230  */
2231 static bool il_is_lq_table_valid(struct il_priv *il,
2232                               struct il_rxon_context *ctx,
2233                               struct il_link_quality_cmd *lq)
2234 {
2235         int i;
2236
2237         if (ctx->ht.enabled)
2238                 return true;
2239
2240         D_INFO("Channel %u is not an HT channel\n",
2241                        ctx->active.channel);
2242         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2243                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
2244                                                 RATE_MCS_HT_MSK) {
2245                         D_INFO(
2246                                        "idx %d of LQ expects HT channel\n",
2247                                        i);
2248                         return false;
2249                 }
2250         }
2251         return true;
2252 }
2253
2254 /**
2255  * il_send_lq_cmd() - Send link quality command
2256  * @init: This command is sent as part of station initialization right
2257  *        after station has been added.
2258  *
2259  * The link quality command is sent as the last step of station creation.
2260  * This is the special case in which init is set and we call a callback in
2261  * this case to clear the state indicating that station creation is in
2262  * progress.
2263  */
2264 int il_send_lq_cmd(struct il_priv *il, struct il_rxon_context *ctx,
2265                     struct il_link_quality_cmd *lq, u8 flags, bool init)
2266 {
2267         int ret = 0;
2268         unsigned long flags_spin;
2269
2270         struct il_host_cmd cmd = {
2271                 .id = C_TX_LINK_QUALITY_CMD,
2272                 .len = sizeof(struct il_link_quality_cmd),
2273                 .flags = flags,
2274                 .data = lq,
2275         };
2276
2277         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2278                 return -EINVAL;
2279
2280
2281         spin_lock_irqsave(&il->sta_lock, flags_spin);
2282         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2283                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2284                 return -EINVAL;
2285         }
2286         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2287
2288         il_dump_lq_cmd(il, lq);
2289         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2290
2291         if (il_is_lq_table_valid(il, ctx, lq))
2292                 ret = il_send_cmd(il, &cmd);
2293         else
2294                 ret = -EINVAL;
2295
2296         if (cmd.flags & CMD_ASYNC)
2297                 return ret;
2298
2299         if (init) {
2300                 D_INFO("init LQ command complete,"
2301                                 " clearing sta addition status for sta %d\n",
2302                                lq->sta_id);
2303                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2304                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2305                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2306         }
2307         return ret;
2308 }
2309 EXPORT_SYMBOL(il_send_lq_cmd);
2310
2311 int il_mac_sta_remove(struct ieee80211_hw *hw,
2312                        struct ieee80211_vif *vif,
2313                        struct ieee80211_sta *sta)
2314 {
2315         struct il_priv *il = hw->priv;
2316         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2317         int ret;
2318
2319         D_INFO("received request to remove station %pM\n",
2320                         sta->addr);
2321         mutex_lock(&il->mutex);
2322         D_INFO("proceeding to remove station %pM\n",
2323                         sta->addr);
2324         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2325         if (ret)
2326                 IL_ERR("Error removing station %pM\n",
2327                         sta->addr);
2328         mutex_unlock(&il->mutex);
2329         return ret;
2330 }
2331 EXPORT_SYMBOL(il_mac_sta_remove);
2332
2333 /************************** RX-FUNCTIONS ****************************/
2334 /*
2335  * Rx theory of operation
2336  *
2337  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2338  * each of which point to Receive Buffers to be filled by the NIC.  These get
2339  * used not only for Rx frames, but for any command response or notification
2340  * from the NIC.  The driver and NIC manage the Rx buffers by means
2341  * of idxes into the circular buffer.
2342  *
2343  * Rx Queue Indexes
2344  * The host/firmware share two idx registers for managing the Rx buffers.
2345  *
2346  * The READ idx maps to the first position that the firmware may be writing
2347  * to -- the driver can read up to (but not including) this position and get
2348  * good data.
2349  * The READ idx is managed by the firmware once the card is enabled.
2350  *
2351  * The WRITE idx maps to the last position the driver has read from -- the
2352  * position preceding WRITE is the last slot the firmware can place a packet.
2353  *
2354  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2355  * WRITE = READ.
2356  *
2357  * During initialization, the host sets up the READ queue position to the first
2358  * IDX position, and WRITE to the last (READ - 1 wrapped)
2359  *
2360  * When the firmware places a packet in a buffer, it will advance the READ idx
2361  * and fire the RX interrupt.  The driver can then query the READ idx and
2362  * process as many packets as possible, moving the WRITE idx forward as it
2363  * resets the Rx queue buffers with new memory.
2364  *
2365  * The management in the driver is as follows:
2366  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2367  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2368  *   to replenish the iwl->rxq->rx_free.
2369  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2370  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2371  *   'processed' and 'read' driver idxes as well)
2372  * + A received packet is processed and handed to the kernel network stack,
2373  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2374  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2375  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2376  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2377  *   were enough free buffers and RX_STALLED is set it is cleared.
2378  *
2379  *
2380  * Driver sequence:
2381  *
2382  * il_rx_queue_alloc()   Allocates rx_free
2383  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2384  *                            il_rx_queue_restock
2385  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2386  *                            queue, updates firmware pointers, and updates
2387  *                            the WRITE idx.  If insufficient rx_free buffers
2388  *                            are available, schedules il_rx_replenish
2389  *
2390  * -- enable interrupts --
2391  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2392  *                            READ IDX, detaching the SKB from the pool.
2393  *                            Moves the packet buffer from queue to rx_used.
2394  *                            Calls il_rx_queue_restock to refill any empty
2395  *                            slots.
2396  * ...
2397  *
2398  */
2399
2400 /**
2401  * il_rx_queue_space - Return number of free slots available in queue.
2402  */
2403 int il_rx_queue_space(const struct il_rx_queue *q)
2404 {
2405         int s = q->read - q->write;
2406         if (s <= 0)
2407                 s += RX_QUEUE_SIZE;
2408         /* keep some buffer to not confuse full and empty queue */
2409         s -= 2;
2410         if (s < 0)
2411                 s = 0;
2412         return s;
2413 }
2414 EXPORT_SYMBOL(il_rx_queue_space);
2415
2416 /**
2417  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2418  */
2419 void
2420 il_rx_queue_update_write_ptr(struct il_priv *il,
2421                                         struct il_rx_queue *q)
2422 {
2423         unsigned long flags;
2424         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2425         u32 reg;
2426
2427         spin_lock_irqsave(&q->lock, flags);
2428
2429         if (q->need_update == 0)
2430                 goto exit_unlock;
2431
2432         /* If power-saving is in use, make sure device is awake */
2433         if (test_bit(S_POWER_PMI, &il->status)) {
2434                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2435
2436                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2437                         D_INFO(
2438                                 "Rx queue requesting wakeup,"
2439                                 " GP1 = 0x%x\n", reg);
2440                         il_set_bit(il, CSR_GP_CNTRL,
2441                                 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2442                         goto exit_unlock;
2443                 }
2444
2445                 q->write_actual = (q->write & ~0x7);
2446                 il_wr(il, rx_wrt_ptr_reg,
2447                                 q->write_actual);
2448
2449         /* Else device is assumed to be awake */
2450         } else {
2451                 /* Device expects a multiple of 8 */
2452                 q->write_actual = (q->write & ~0x7);
2453                 il_wr(il, rx_wrt_ptr_reg,
2454                         q->write_actual);
2455         }
2456
2457         q->need_update = 0;
2458
2459  exit_unlock:
2460         spin_unlock_irqrestore(&q->lock, flags);
2461 }
2462 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2463
2464 int il_rx_queue_alloc(struct il_priv *il)
2465 {
2466         struct il_rx_queue *rxq = &il->rxq;
2467         struct device *dev = &il->pci_dev->dev;
2468         int i;
2469
2470         spin_lock_init(&rxq->lock);
2471         INIT_LIST_HEAD(&rxq->rx_free);
2472         INIT_LIST_HEAD(&rxq->rx_used);
2473
2474         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2475         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2476                                      GFP_KERNEL);
2477         if (!rxq->bd)
2478                 goto err_bd;
2479
2480         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2481                                           &rxq->rb_stts_dma, GFP_KERNEL);
2482         if (!rxq->rb_stts)
2483                 goto err_rb;
2484
2485         /* Fill the rx_used queue with _all_ of the Rx buffers */
2486         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2487                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2488
2489         /* Set us so that we have processed and used all buffers, but have
2490          * not restocked the Rx queue with fresh buffers */
2491         rxq->read = rxq->write = 0;
2492         rxq->write_actual = 0;
2493         rxq->free_count = 0;
2494         rxq->need_update = 0;
2495         return 0;
2496
2497 err_rb:
2498         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2499                           rxq->bd_dma);
2500 err_bd:
2501         return -ENOMEM;
2502 }
2503 EXPORT_SYMBOL(il_rx_queue_alloc);
2504
2505
2506 void il_hdl_spectrum_measurement(struct il_priv *il,
2507                                           struct il_rx_buf *rxb)
2508 {
2509         struct il_rx_pkt *pkt = rxb_addr(rxb);
2510         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2511
2512         if (!report->state) {
2513                 D_11H(
2514                         "Spectrum Measure Notification: Start\n");
2515                 return;
2516         }
2517
2518         memcpy(&il->measure_report, report, sizeof(*report));
2519         il->measurement_status |= MEASUREMENT_READY;
2520 }
2521 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2522
2523 /*
2524  * returns non-zero if packet should be dropped
2525  */
2526 int il_set_decrypted_flag(struct il_priv *il,
2527                            struct ieee80211_hdr *hdr,
2528                            u32 decrypt_res,
2529                            struct ieee80211_rx_status *stats)
2530 {
2531         u16 fc = le16_to_cpu(hdr->frame_control);
2532
2533         /*
2534          * All contexts have the same setting here due to it being
2535          * a module parameter, so OK to check any context.
2536          */
2537         if (il->ctx.active.filter_flags &
2538                                                 RXON_FILTER_DIS_DECRYPT_MSK)
2539                 return 0;
2540
2541         if (!(fc & IEEE80211_FCTL_PROTECTED))
2542                 return 0;
2543
2544         D_RX("decrypt_res:0x%x\n", decrypt_res);
2545         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2546         case RX_RES_STATUS_SEC_TYPE_TKIP:
2547                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2548                  * Decryption will be done in SW. */
2549                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2550                     RX_RES_STATUS_BAD_KEY_TTAK)
2551                         break;
2552
2553         case RX_RES_STATUS_SEC_TYPE_WEP:
2554                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2555                     RX_RES_STATUS_BAD_ICV_MIC) {
2556                         /* bad ICV, the packet is destroyed since the
2557                          * decryption is inplace, drop it */
2558                         D_RX("Packet destroyed\n");
2559                         return -1;
2560                 }
2561         case RX_RES_STATUS_SEC_TYPE_CCMP:
2562                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2563                     RX_RES_STATUS_DECRYPT_OK) {
2564                         D_RX("hw decrypt successfully!!!\n");
2565                         stats->flag |= RX_FLAG_DECRYPTED;
2566                 }
2567                 break;
2568
2569         default:
2570                 break;
2571         }
2572         return 0;
2573 }
2574 EXPORT_SYMBOL(il_set_decrypted_flag);
2575
2576 /**
2577  * il_txq_update_write_ptr - Send new write idx to hardware
2578  */
2579 void
2580 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2581 {
2582         u32 reg = 0;
2583         int txq_id = txq->q.id;
2584
2585         if (txq->need_update == 0)
2586                 return;
2587
2588         /* if we're trying to save power */
2589         if (test_bit(S_POWER_PMI, &il->status)) {
2590                 /* wake up nic if it's powered down ...
2591                  * uCode will wake up, and interrupt us again, so next
2592                  * time we'll skip this part. */
2593                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2594
2595                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2596                         D_INFO(
2597                                         "Tx queue %d requesting wakeup,"
2598                                         " GP1 = 0x%x\n", txq_id, reg);
2599                         il_set_bit(il, CSR_GP_CNTRL,
2600                                         CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2601                         return;
2602                 }
2603
2604                 il_wr(il, HBUS_TARG_WRPTR,
2605                                 txq->q.write_ptr | (txq_id << 8));
2606
2607                 /*
2608                  * else not in power-save mode,
2609                  * uCode will never sleep when we're
2610                  * trying to tx (during RFKILL, we're not trying to tx).
2611                  */
2612         } else
2613                 _il_wr(il, HBUS_TARG_WRPTR,
2614                             txq->q.write_ptr | (txq_id << 8));
2615         txq->need_update = 0;
2616 }
2617 EXPORT_SYMBOL(il_txq_update_write_ptr);
2618
2619 /**
2620  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2621  */
2622 void il_tx_queue_unmap(struct il_priv *il, int txq_id)
2623 {
2624         struct il_tx_queue *txq = &il->txq[txq_id];
2625         struct il_queue *q = &txq->q;
2626
2627         if (q->n_bd == 0)
2628                 return;
2629
2630         while (q->write_ptr != q->read_ptr) {
2631                 il->cfg->ops->lib->txq_free_tfd(il, txq);
2632                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2633         }
2634 }
2635 EXPORT_SYMBOL(il_tx_queue_unmap);
2636
2637 /**
2638  * il_tx_queue_free - Deallocate DMA queue.
2639  * @txq: Transmit queue to deallocate.
2640  *
2641  * Empty queue by removing and destroying all BD's.
2642  * Free all buffers.
2643  * 0-fill, but do not free "txq" descriptor structure.
2644  */
2645 void il_tx_queue_free(struct il_priv *il, int txq_id)
2646 {
2647         struct il_tx_queue *txq = &il->txq[txq_id];
2648         struct device *dev = &il->pci_dev->dev;
2649         int i;
2650
2651         il_tx_queue_unmap(il, txq_id);
2652
2653         /* De-alloc array of command/tx buffers */
2654         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2655                 kfree(txq->cmd[i]);
2656
2657         /* De-alloc circular buffer of TFDs */
2658         if (txq->q.n_bd)
2659                 dma_free_coherent(dev, il->hw_params.tfd_size *
2660                                   txq->q.n_bd, txq->tfds, txq->q.dma_addr);
2661
2662         /* De-alloc array of per-TFD driver data */
2663         kfree(txq->txb);
2664         txq->txb = NULL;
2665
2666         /* deallocate arrays */
2667         kfree(txq->cmd);
2668         kfree(txq->meta);
2669         txq->cmd = NULL;
2670         txq->meta = NULL;
2671
2672         /* 0-fill queue descriptor structure */
2673         memset(txq, 0, sizeof(*txq));
2674 }
2675 EXPORT_SYMBOL(il_tx_queue_free);
2676
2677 /**
2678  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2679  */
2680 void il_cmd_queue_unmap(struct il_priv *il)
2681 {
2682         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2683         struct il_queue *q = &txq->q;
2684         int i;
2685
2686         if (q->n_bd == 0)
2687                 return;
2688
2689         while (q->read_ptr != q->write_ptr) {
2690                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2691
2692                 if (txq->meta[i].flags & CMD_MAPPED) {
2693                         pci_unmap_single(il->pci_dev,
2694                                          dma_unmap_addr(&txq->meta[i], mapping),
2695                                          dma_unmap_len(&txq->meta[i], len),
2696                                          PCI_DMA_BIDIRECTIONAL);
2697                         txq->meta[i].flags = 0;
2698                 }
2699
2700                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2701         }
2702
2703         i = q->n_win;
2704         if (txq->meta[i].flags & CMD_MAPPED) {
2705                 pci_unmap_single(il->pci_dev,
2706                                  dma_unmap_addr(&txq->meta[i], mapping),
2707                                  dma_unmap_len(&txq->meta[i], len),
2708                                  PCI_DMA_BIDIRECTIONAL);
2709                 txq->meta[i].flags = 0;
2710         }
2711 }
2712 EXPORT_SYMBOL(il_cmd_queue_unmap);
2713
2714 /**
2715  * il_cmd_queue_free - Deallocate DMA queue.
2716  * @txq: Transmit queue to deallocate.
2717  *
2718  * Empty queue by removing and destroying all BD's.
2719  * Free all buffers.
2720  * 0-fill, but do not free "txq" descriptor structure.
2721  */
2722 void il_cmd_queue_free(struct il_priv *il)
2723 {
2724         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2725         struct device *dev = &il->pci_dev->dev;
2726         int i;
2727
2728         il_cmd_queue_unmap(il);
2729
2730         /* De-alloc array of command/tx buffers */
2731         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2732                 kfree(txq->cmd[i]);
2733
2734         /* De-alloc circular buffer of TFDs */
2735         if (txq->q.n_bd)
2736                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2737                                   txq->tfds, txq->q.dma_addr);
2738
2739         /* deallocate arrays */
2740         kfree(txq->cmd);
2741         kfree(txq->meta);
2742         txq->cmd = NULL;
2743         txq->meta = NULL;
2744
2745         /* 0-fill queue descriptor structure */
2746         memset(txq, 0, sizeof(*txq));
2747 }
2748 EXPORT_SYMBOL(il_cmd_queue_free);
2749
2750 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2751  * DMA services
2752  *
2753  * Theory of operation
2754  *
2755  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2756  * of buffer descriptors, each of which points to one or more data buffers for
2757  * the device to read from or fill.  Driver and device exchange status of each
2758  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2759  * entries in each circular buffer, to protect against confusing empty and full
2760  * queue states.
2761  *
2762  * The device reads or writes the data in the queues via the device's several
2763  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2764  *
2765  * For Tx queue, there are low mark and high mark limits. If, after queuing
2766  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2767  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2768  * Tx queue resumed.
2769  *
2770  * See more detailed info in 4965.h.
2771  ***************************************************/
2772
2773 int il_queue_space(const struct il_queue *q)
2774 {
2775         int s = q->read_ptr - q->write_ptr;
2776
2777         if (q->read_ptr > q->write_ptr)
2778                 s -= q->n_bd;
2779
2780         if (s <= 0)
2781                 s += q->n_win;
2782         /* keep some reserve to not confuse empty and full situations */
2783         s -= 2;
2784         if (s < 0)
2785                 s = 0;
2786         return s;
2787 }
2788 EXPORT_SYMBOL(il_queue_space);
2789
2790
2791 /**
2792  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2793  */
2794 static int il_queue_init(struct il_priv *il, struct il_queue *q,
2795                           int count, int slots_num, u32 id)
2796 {
2797         q->n_bd = count;
2798         q->n_win = slots_num;
2799         q->id = id;
2800
2801         /* count must be power-of-two size, otherwise il_queue_inc_wrap
2802          * and il_queue_dec_wrap are broken. */
2803         BUG_ON(!is_power_of_2(count));
2804
2805         /* slots_num must be power-of-two size, otherwise
2806          * il_get_cmd_idx is broken. */
2807         BUG_ON(!is_power_of_2(slots_num));
2808
2809         q->low_mark = q->n_win / 4;
2810         if (q->low_mark < 4)
2811                 q->low_mark = 4;
2812
2813         q->high_mark = q->n_win / 8;
2814         if (q->high_mark < 2)
2815                 q->high_mark = 2;
2816
2817         q->write_ptr = q->read_ptr = 0;
2818
2819         return 0;
2820 }
2821
2822 /**
2823  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2824  */
2825 static int il_tx_queue_alloc(struct il_priv *il,
2826                               struct il_tx_queue *txq, u32 id)
2827 {
2828         struct device *dev = &il->pci_dev->dev;
2829         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2830
2831         /* Driver ilate data, only for Tx (not command) queues,
2832          * not shared with device. */
2833         if (id != il->cmd_queue) {
2834                 txq->txb = kzalloc(sizeof(txq->txb[0]) *
2835                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
2836                 if (!txq->txb) {
2837                         IL_ERR("kmalloc for auxiliary BD "
2838                                   "structures failed\n");
2839                         goto error;
2840                 }
2841         } else {
2842                 txq->txb = NULL;
2843         }
2844
2845         /* Circular buffer of transmit frame descriptors (TFDs),
2846          * shared with device */
2847         txq->tfds = dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr,
2848                                        GFP_KERNEL);
2849         if (!txq->tfds) {
2850                 IL_ERR("pci_alloc_consistent(%zd) failed\n", tfd_sz);
2851                 goto error;
2852         }
2853         txq->q.id = id;
2854
2855         return 0;
2856
2857  error:
2858         kfree(txq->txb);
2859         txq->txb = NULL;
2860
2861         return -ENOMEM;
2862 }
2863
2864 /**
2865  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2866  */
2867 int il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq,
2868                       int slots_num, u32 txq_id)
2869 {
2870         int i, len;
2871         int ret;
2872         int actual_slots = slots_num;
2873
2874         /*
2875          * Alloc buffer array for commands (Tx or other types of commands).
2876          * For the command queue (#4/#9), allocate command space + one big
2877          * command for scan, since scan command is very huge; the system will
2878          * not have two scans at the same time, so only one is needed.
2879          * For normal Tx queues (all other queues), no super-size command
2880          * space is needed.
2881          */
2882         if (txq_id == il->cmd_queue)
2883                 actual_slots++;
2884
2885         txq->meta = kzalloc(sizeof(struct il_cmd_meta) * actual_slots,
2886                             GFP_KERNEL);
2887         txq->cmd = kzalloc(sizeof(struct il_device_cmd *) * actual_slots,
2888                            GFP_KERNEL);
2889
2890         if (!txq->meta || !txq->cmd)
2891                 goto out_free_arrays;
2892
2893         len = sizeof(struct il_device_cmd);
2894         for (i = 0; i < actual_slots; i++) {
2895                 /* only happens for cmd queue */
2896                 if (i == slots_num)
2897                         len = IL_MAX_CMD_SIZE;
2898
2899                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
2900                 if (!txq->cmd[i])
2901                         goto err;
2902         }
2903
2904         /* Alloc driver data array and TFD circular buffer */
2905         ret = il_tx_queue_alloc(il, txq, txq_id);
2906         if (ret)
2907                 goto err;
2908
2909         txq->need_update = 0;
2910
2911         /*
2912          * For the default queues 0-3, set up the swq_id
2913          * already -- all others need to get one later
2914          * (if they need one at all).
2915          */
2916         if (txq_id < 4)
2917                 il_set_swq_id(txq, txq_id, txq_id);
2918
2919         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2920          * il_queue_inc_wrap and il_queue_dec_wrap are broken. */
2921         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2922
2923         /* Initialize queue's high/low-water marks, and head/tail idxes */
2924         il_queue_init(il, &txq->q,
2925                                 TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2926
2927         /* Tell device where to find queue */
2928         il->cfg->ops->lib->txq_init(il, txq);
2929
2930         return 0;
2931 err:
2932         for (i = 0; i < actual_slots; i++)
2933                 kfree(txq->cmd[i]);
2934 out_free_arrays:
2935         kfree(txq->meta);
2936         kfree(txq->cmd);
2937
2938         return -ENOMEM;
2939 }
2940 EXPORT_SYMBOL(il_tx_queue_init);
2941
2942 void il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq,
2943                         int slots_num, u32 txq_id)
2944 {
2945         int actual_slots = slots_num;
2946
2947         if (txq_id == il->cmd_queue)
2948                 actual_slots++;
2949
2950         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
2951
2952         txq->need_update = 0;
2953
2954         /* Initialize queue's high/low-water marks, and head/tail idxes */
2955         il_queue_init(il, &txq->q,
2956                                 TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2957
2958         /* Tell device where to find queue */
2959         il->cfg->ops->lib->txq_init(il, txq);
2960 }
2961 EXPORT_SYMBOL(il_tx_queue_reset);
2962
2963 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
2964
2965 /**
2966  * il_enqueue_hcmd - enqueue a uCode command
2967  * @il: device ilate data point
2968  * @cmd: a point to the ucode command structure
2969  *
2970  * The function returns < 0 values to indicate the operation is
2971  * failed. On success, it turns the idx (> 0) of command in the
2972  * command queue.
2973  */
2974 int il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
2975 {
2976         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2977         struct il_queue *q = &txq->q;
2978         struct il_device_cmd *out_cmd;
2979         struct il_cmd_meta *out_meta;
2980         dma_addr_t phys_addr;
2981         unsigned long flags;
2982         int len;
2983         u32 idx;
2984         u16 fix_size;
2985
2986         cmd->len = il->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
2987         fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
2988
2989         /* If any of the command structures end up being larger than
2990          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
2991          * we will need to increase the size of the TFD entries
2992          * Also, check to see if command buffer should not exceed the size
2993          * of device_cmd and max_cmd_size. */
2994         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
2995                !(cmd->flags & CMD_SIZE_HUGE));
2996         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
2997
2998         if (il_is_rfkill(il) || il_is_ctkill(il)) {
2999                 IL_WARN("Not sending command - %s KILL\n",
3000                          il_is_rfkill(il) ? "RF" : "CT");
3001                 return -EIO;
3002         }
3003
3004         spin_lock_irqsave(&il->hcmd_lock, flags);
3005
3006         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3007                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3008
3009                 IL_ERR("Restarting adapter due to command queue full\n");
3010                 queue_work(il->workqueue, &il->restart);
3011                 return -ENOSPC;
3012         }
3013
3014         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3015         out_cmd = txq->cmd[idx];
3016         out_meta = &txq->meta[idx];
3017
3018         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3019                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3020                 return -ENOSPC;
3021         }
3022
3023         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3024         out_meta->flags = cmd->flags | CMD_MAPPED;
3025         if (cmd->flags & CMD_WANT_SKB)
3026                 out_meta->source = cmd;
3027         if (cmd->flags & CMD_ASYNC)
3028                 out_meta->callback = cmd->callback;
3029
3030         out_cmd->hdr.cmd = cmd->id;
3031         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3032
3033         /* At this point, the out_cmd now has all of the incoming cmd
3034          * information */
3035
3036         out_cmd->hdr.flags = 0;
3037         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) |
3038                         IDX_TO_SEQ(q->write_ptr));
3039         if (cmd->flags & CMD_SIZE_HUGE)
3040                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3041         len = sizeof(struct il_device_cmd);
3042         if (idx == TFD_CMD_SLOTS)
3043                 len = IL_MAX_CMD_SIZE;
3044
3045 #ifdef CONFIG_IWLEGACY_DEBUG
3046         switch (out_cmd->hdr.cmd) {
3047         case C_TX_LINK_QUALITY_CMD:
3048         case C_SENSITIVITY:
3049                 D_HC_DUMP(
3050                                 "Sending command %s (#%x), seq: 0x%04X, "
3051                                 "%d bytes at %d[%d]:%d\n",
3052                                 il_get_cmd_string(out_cmd->hdr.cmd),
3053                                 out_cmd->hdr.cmd,
3054                                 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3055                                 q->write_ptr, idx, il->cmd_queue);
3056                 break;
3057         default:
3058                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3059                                 "%d bytes at %d[%d]:%d\n",
3060                                 il_get_cmd_string(out_cmd->hdr.cmd),
3061                                 out_cmd->hdr.cmd,
3062                                 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3063                                 q->write_ptr, idx, il->cmd_queue);
3064         }
3065 #endif
3066         txq->need_update = 1;
3067
3068         if (il->cfg->ops->lib->txq_update_byte_cnt_tbl)
3069                 /* Set up entry in queue's byte count circular buffer */
3070                 il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0);
3071
3072         phys_addr = pci_map_single(il->pci_dev, &out_cmd->hdr,
3073                                    fix_size, PCI_DMA_BIDIRECTIONAL);
3074         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3075         dma_unmap_len_set(out_meta, len, fix_size);
3076
3077         il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
3078                                                    phys_addr, fix_size, 1,
3079                                                    U32_PAD(cmd->len));
3080
3081         /* Increment and update queue's write idx */
3082         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3083         il_txq_update_write_ptr(il, txq);
3084
3085         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3086         return idx;
3087 }
3088
3089 /**
3090  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3091  *
3092  * When FW advances 'R' idx, all entries between old and new 'R' idx
3093  * need to be reclaimed. As result, some free space forms.  If there is
3094  * enough free space (> low mark), wake the stack that feeds us.
3095  */
3096 static void il_hcmd_queue_reclaim(struct il_priv *il, int txq_id,
3097                                    int idx, int cmd_idx)
3098 {
3099         struct il_tx_queue *txq = &il->txq[txq_id];
3100         struct il_queue *q = &txq->q;
3101         int nfreed = 0;
3102
3103         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3104                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3105                           "is out of range [0-%d] %d %d.\n", txq_id,
3106                           idx, q->n_bd, q->write_ptr, q->read_ptr);
3107                 return;
3108         }
3109
3110         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3111              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3112
3113                 if (nfreed++ > 0) {
3114                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3115                                         q->write_ptr, q->read_ptr);
3116                         queue_work(il->workqueue, &il->restart);
3117                 }
3118
3119         }
3120 }
3121
3122 /**
3123  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3124  * @rxb: Rx buffer to reclaim
3125  *
3126  * If an Rx buffer has an async callback associated with it the callback
3127  * will be executed.  The attached skb (if present) will only be freed
3128  * if the callback returns 1
3129  */
3130 void
3131 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3132 {
3133         struct il_rx_pkt *pkt = rxb_addr(rxb);
3134         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3135         int txq_id = SEQ_TO_QUEUE(sequence);
3136         int idx = SEQ_TO_IDX(sequence);
3137         int cmd_idx;
3138         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3139         struct il_device_cmd *cmd;
3140         struct il_cmd_meta *meta;
3141         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3142         unsigned long flags;
3143
3144         /* If a Tx command is being handled and it isn't in the actual
3145          * command queue then there a command routing bug has been introduced
3146          * in the queue management code. */
3147         if (WARN(txq_id != il->cmd_queue,
3148                  "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3149                   txq_id, il->cmd_queue, sequence,
3150                   il->txq[il->cmd_queue].q.read_ptr,
3151                   il->txq[il->cmd_queue].q.write_ptr)) {
3152                 il_print_hex_error(il, pkt, 32);
3153                 return;
3154         }
3155
3156         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3157         cmd = txq->cmd[cmd_idx];
3158         meta = &txq->meta[cmd_idx];
3159
3160         txq->time_stamp = jiffies;
3161
3162         pci_unmap_single(il->pci_dev,
3163                          dma_unmap_addr(meta, mapping),
3164                          dma_unmap_len(meta, len),
3165                          PCI_DMA_BIDIRECTIONAL);
3166
3167         /* Input error checking is done when commands are added to queue. */
3168         if (meta->flags & CMD_WANT_SKB) {
3169                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3170                 rxb->page = NULL;
3171         } else if (meta->callback)
3172                 meta->callback(il, cmd, pkt);
3173
3174         spin_lock_irqsave(&il->hcmd_lock, flags);
3175
3176         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3177
3178         if (!(meta->flags & CMD_ASYNC)) {
3179                 clear_bit(S_HCMD_ACTIVE, &il->status);
3180                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3181                                il_get_cmd_string(cmd->hdr.cmd));
3182                 wake_up(&il->wait_command_queue);
3183         }
3184
3185         /* Mark as unmapped */
3186         meta->flags = 0;
3187
3188         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3189 }
3190 EXPORT_SYMBOL(il_tx_cmd_complete);
3191
3192 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3193 MODULE_VERSION(IWLWIFI_VERSION);
3194 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3195 MODULE_LICENSE("GPL");
3196
3197 /*
3198  * set bt_coex_active to true, uCode will do kill/defer
3199  * every time the priority line is asserted (BT is sending signals on the
3200  * priority line in the PCIx).
3201  * set bt_coex_active to false, uCode will ignore the BT activity and
3202  * perform the normal operation
3203  *
3204  * User might experience transmit issue on some platform due to WiFi/BT
3205  * co-exist problem. The possible behaviors are:
3206  *   Able to scan and finding all the available AP
3207  *   Not able to associate with any AP
3208  * On those platforms, WiFi communication can be restored by set
3209  * "bt_coex_active" module parameter to "false"
3210  *
3211  * default: bt_coex_active = true (BT_COEX_ENABLE)
3212  */
3213 static bool bt_coex_active = true;
3214 module_param(bt_coex_active, bool, S_IRUGO);
3215 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3216
3217 u32 il_debug_level;
3218 EXPORT_SYMBOL(il_debug_level);
3219
3220 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3221 EXPORT_SYMBOL(il_bcast_addr);
3222
3223
3224 /* This function both allocates and initializes hw and il. */
3225 struct ieee80211_hw *il_alloc_all(struct il_cfg *cfg)
3226 {
3227         struct il_priv *il;
3228         /* mac80211 allocates memory for this device instance, including
3229          *   space for this driver's ilate structure */
3230         struct ieee80211_hw *hw;
3231
3232         hw = ieee80211_alloc_hw(sizeof(struct il_priv),
3233                                 cfg->ops->ieee80211_ops);
3234         if (hw == NULL) {
3235                 pr_err("%s: Can not allocate network device\n",
3236                        cfg->name);
3237                 goto out;
3238         }
3239
3240         il = hw->priv;
3241         il->hw = hw;
3242
3243 out:
3244         return hw;
3245 }
3246 EXPORT_SYMBOL(il_alloc_all);
3247
3248 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3249 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3250 static void il_init_ht_hw_capab(const struct il_priv *il,
3251                               struct ieee80211_sta_ht_cap *ht_info,
3252                               enum ieee80211_band band)
3253 {
3254         u16 max_bit_rate = 0;
3255         u8 rx_chains_num = il->hw_params.rx_chains_num;
3256         u8 tx_chains_num = il->hw_params.tx_chains_num;
3257
3258         ht_info->cap = 0;
3259         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3260
3261         ht_info->ht_supported = true;
3262
3263         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3264         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3265         if (il->hw_params.ht40_channel & BIT(band)) {
3266                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3267                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3268                 ht_info->mcs.rx_mask[4] = 0x01;
3269                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3270         }
3271
3272         if (il->cfg->mod_params->amsdu_size_8K)
3273                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3274
3275         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3276         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3277
3278         ht_info->mcs.rx_mask[0] = 0xFF;
3279         if (rx_chains_num >= 2)
3280                 ht_info->mcs.rx_mask[1] = 0xFF;
3281         if (rx_chains_num >= 3)
3282                 ht_info->mcs.rx_mask[2] = 0xFF;
3283
3284         /* Highest supported Rx data rate */
3285         max_bit_rate *= rx_chains_num;
3286         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3287         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3288
3289         /* Tx MCS capabilities */
3290         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3291         if (tx_chains_num != rx_chains_num) {
3292                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3293                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
3294                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3295         }
3296 }
3297
3298 /**
3299  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3300  */
3301 int il_init_geos(struct il_priv *il)
3302 {
3303         struct il_channel_info *ch;
3304         struct ieee80211_supported_band *sband;
3305         struct ieee80211_channel *channels;
3306         struct ieee80211_channel *geo_ch;
3307         struct ieee80211_rate *rates;
3308         int i = 0;
3309         s8 max_tx_power = 0;
3310
3311         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3312             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3313                 D_INFO("Geography modes already initialized.\n");
3314                 set_bit(S_GEO_CONFIGURED, &il->status);
3315                 return 0;
3316         }
3317
3318         channels = kzalloc(sizeof(struct ieee80211_channel) *
3319                            il->channel_count, GFP_KERNEL);
3320         if (!channels)
3321                 return -ENOMEM;
3322
3323         rates = kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3324                         GFP_KERNEL);
3325         if (!rates) {
3326                 kfree(channels);
3327                 return -ENOMEM;
3328         }
3329
3330         /* 5.2GHz channels start after the 2.4GHz channels */
3331         sband = &il->bands[IEEE80211_BAND_5GHZ];
3332         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3333         /* just OFDM */
3334         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3335         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3336
3337         if (il->cfg->sku & IL_SKU_N)
3338                 il_init_ht_hw_capab(il, &sband->ht_cap,
3339                                          IEEE80211_BAND_5GHZ);
3340
3341         sband = &il->bands[IEEE80211_BAND_2GHZ];
3342         sband->channels = channels;
3343         /* OFDM & CCK */
3344         sband->bitrates = rates;
3345         sband->n_bitrates = RATE_COUNT_LEGACY;
3346
3347         if (il->cfg->sku & IL_SKU_N)
3348                 il_init_ht_hw_capab(il, &sband->ht_cap,
3349                                          IEEE80211_BAND_2GHZ);
3350
3351         il->ieee_channels = channels;
3352         il->ieee_rates = rates;
3353
3354         for (i = 0;  i < il->channel_count; i++) {
3355                 ch = &il->channel_info[i];
3356
3357                 if (!il_is_channel_valid(ch))
3358                         continue;
3359
3360                 sband = &il->bands[ch->band];
3361
3362                 geo_ch = &sband->channels[sband->n_channels++];
3363
3364                 geo_ch->center_freq =
3365                         ieee80211_channel_to_frequency(ch->channel, ch->band);
3366                 geo_ch->max_power = ch->max_power_avg;
3367                 geo_ch->max_antenna_gain = 0xff;
3368                 geo_ch->hw_value = ch->channel;
3369
3370                 if (il_is_channel_valid(ch)) {
3371                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3372                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3373
3374                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3375                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3376
3377                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3378                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3379
3380                         geo_ch->flags |= ch->ht40_extension_channel;
3381
3382                         if (ch->max_power_avg > max_tx_power)
3383                                 max_tx_power = ch->max_power_avg;
3384                 } else {
3385                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3386                 }
3387
3388                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
3389                                 ch->channel, geo_ch->center_freq,
3390                                 il_is_channel_a_band(ch) ?  "5.2" : "2.4",
3391                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
3392                                 "restricted" : "valid",
3393                                  geo_ch->flags);
3394         }
3395
3396         il->tx_power_device_lmt = max_tx_power;
3397         il->tx_power_user_lmt = max_tx_power;
3398         il->tx_power_next = max_tx_power;
3399
3400         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3401             (il->cfg->sku & IL_SKU_A)) {
3402                 IL_INFO("Incorrectly detected BG card as ABG. "
3403                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3404                            il->pci_dev->device,
3405                            il->pci_dev->subsystem_device);
3406                 il->cfg->sku &= ~IL_SKU_A;
3407         }
3408
3409         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3410                    il->bands[IEEE80211_BAND_2GHZ].n_channels,
3411                    il->bands[IEEE80211_BAND_5GHZ].n_channels);
3412
3413         set_bit(S_GEO_CONFIGURED, &il->status);
3414
3415         return 0;
3416 }
3417 EXPORT_SYMBOL(il_init_geos);
3418
3419 /*
3420  * il_free_geos - undo allocations in il_init_geos
3421  */
3422 void il_free_geos(struct il_priv *il)
3423 {
3424         kfree(il->ieee_channels);
3425         kfree(il->ieee_rates);
3426         clear_bit(S_GEO_CONFIGURED, &il->status);
3427 }
3428 EXPORT_SYMBOL(il_free_geos);
3429
3430 static bool il_is_channel_extension(struct il_priv *il,
3431                                      enum ieee80211_band band,
3432                                      u16 channel, u8 extension_chan_offset)
3433 {
3434         const struct il_channel_info *ch_info;
3435
3436         ch_info = il_get_channel_info(il, band, channel);
3437         if (!il_is_channel_valid(ch_info))
3438                 return false;
3439
3440         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3441                 return !(ch_info->ht40_extension_channel &
3442                                         IEEE80211_CHAN_NO_HT40PLUS);
3443         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3444                 return !(ch_info->ht40_extension_channel &
3445                                         IEEE80211_CHAN_NO_HT40MINUS);
3446
3447         return false;
3448 }
3449
3450 bool il_is_ht40_tx_allowed(struct il_priv *il,
3451                             struct il_rxon_context *ctx,
3452                             struct ieee80211_sta_ht_cap *ht_cap)
3453 {
3454         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
3455                 return false;
3456
3457         /*
3458          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3459          * the bit will not set if it is pure 40MHz case
3460          */
3461         if (ht_cap && !ht_cap->ht_supported)
3462                 return false;
3463
3464 #ifdef CONFIG_IWLEGACY_DEBUGFS
3465         if (il->disable_ht40)
3466                 return false;
3467 #endif
3468
3469         return il_is_channel_extension(il, il->band,
3470                         le16_to_cpu(ctx->staging.channel),
3471                         ctx->ht.extension_chan_offset);
3472 }
3473 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3474
3475 static u16 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3476 {
3477         u16 new_val;
3478         u16 beacon_factor;
3479
3480         /*
3481          * If mac80211 hasn't given us a beacon interval, program
3482          * the default into the device.
3483          */
3484         if (!beacon_val)
3485                 return DEFAULT_BEACON_INTERVAL;
3486
3487         /*
3488          * If the beacon interval we obtained from the peer
3489          * is too large, we'll have to wake up more often
3490          * (and in IBSS case, we'll beacon too much)
3491          *
3492          * For example, if max_beacon_val is 4096, and the
3493          * requested beacon interval is 7000, we'll have to
3494          * use 3500 to be able to wake up on the beacons.
3495          *
3496          * This could badly influence beacon detection stats.
3497          */
3498
3499         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3500         new_val = beacon_val / beacon_factor;
3501
3502         if (!new_val)
3503                 new_val = max_beacon_val;
3504
3505         return new_val;
3506 }
3507
3508 int
3509 il_send_rxon_timing(struct il_priv *il, struct il_rxon_context *ctx)
3510 {
3511         u64 tsf;
3512         s32 interval_tm, rem;
3513         struct ieee80211_conf *conf = NULL;
3514         u16 beacon_int;
3515         struct ieee80211_vif *vif = ctx->vif;
3516
3517         conf = &il->hw->conf;
3518
3519         lockdep_assert_held(&il->mutex);
3520
3521         memset(&ctx->timing, 0, sizeof(struct il_rxon_time_cmd));
3522
3523         ctx->timing.timestamp = cpu_to_le64(il->timestamp);
3524         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3525
3526         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3527
3528         /*
3529          * TODO: For IBSS we need to get atim_win from mac80211,
3530          *       for now just always use 0
3531          */
3532         ctx->timing.atim_win = 0;
3533
3534         beacon_int = il_adjust_beacon_interval(beacon_int,
3535                         il->hw_params.max_beacon_itrvl * TIME_UNIT);
3536         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
3537
3538         tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3539         interval_tm = beacon_int * TIME_UNIT;
3540         rem = do_div(tsf, interval_tm);
3541         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3542
3543         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
3544
3545         D_ASSOC(
3546                         "beacon interval %d beacon timer %d beacon tim %d\n",
3547                         le16_to_cpu(ctx->timing.beacon_interval),
3548                         le32_to_cpu(ctx->timing.beacon_init_val),
3549                         le16_to_cpu(ctx->timing.atim_win));
3550
3551         return il_send_cmd_pdu(il, ctx->rxon_timing_cmd,
3552                                 sizeof(ctx->timing), &ctx->timing);
3553 }
3554 EXPORT_SYMBOL(il_send_rxon_timing);
3555
3556 void
3557 il_set_rxon_hwcrypto(struct il_priv *il,
3558                                 struct il_rxon_context *ctx,
3559                                 int hw_decrypt)
3560 {
3561         struct il_rxon_cmd *rxon = &ctx->staging;
3562
3563         if (hw_decrypt)
3564                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3565         else
3566                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3567
3568 }
3569 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3570
3571 /* validate RXON structure is valid */
3572 int
3573 il_check_rxon_cmd(struct il_priv *il, struct il_rxon_context *ctx)
3574 {
3575         struct il_rxon_cmd *rxon = &ctx->staging;
3576         bool error = false;
3577
3578         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3579                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3580                         IL_WARN("check 2.4G: wrong narrow\n");
3581                         error = true;
3582                 }
3583                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3584                         IL_WARN("check 2.4G: wrong radar\n");
3585                         error = true;
3586                 }
3587         } else {
3588                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3589                         IL_WARN("check 5.2G: not short slot!\n");
3590                         error = true;
3591                 }
3592                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3593                         IL_WARN("check 5.2G: CCK!\n");
3594                         error = true;
3595                 }
3596         }
3597         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3598                 IL_WARN("mac/bssid mcast!\n");
3599                 error = true;
3600         }
3601
3602         /* make sure basic rates 6Mbps and 1Mbps are supported */
3603         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3604             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3605                 IL_WARN("neither 1 nor 6 are basic\n");
3606                 error = true;
3607         }
3608
3609         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3610                 IL_WARN("aid > 2007\n");
3611                 error = true;
3612         }
3613
3614         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
3615                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3616                 IL_WARN("CCK and short slot\n");
3617                 error = true;
3618         }
3619
3620         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
3621                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3622                 IL_WARN("CCK and auto detect");
3623                 error = true;
3624         }
3625
3626         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
3627                             RXON_FLG_TGG_PROTECT_MSK)) ==
3628                             RXON_FLG_TGG_PROTECT_MSK) {
3629                 IL_WARN("TGg but no auto-detect\n");
3630                 error = true;
3631         }
3632
3633         if (error)
3634                 IL_WARN("Tuning to channel %d\n",
3635                             le16_to_cpu(rxon->channel));
3636
3637         if (error) {
3638                 IL_ERR("Invalid RXON\n");
3639                 return -EINVAL;
3640         }
3641         return 0;
3642 }
3643 EXPORT_SYMBOL(il_check_rxon_cmd);
3644
3645 /**
3646  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3647  * @il: staging_rxon is compared to active_rxon
3648  *
3649  * If the RXON structure is changing enough to require a new tune,
3650  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3651  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3652  */
3653 int il_full_rxon_required(struct il_priv *il,
3654                            struct il_rxon_context *ctx)
3655 {
3656         const struct il_rxon_cmd *staging = &ctx->staging;
3657         const struct il_rxon_cmd *active = &ctx->active;
3658
3659 #define CHK(cond)                                                       \
3660         if ((cond)) {                                                   \
3661                 D_INFO("need full RXON - " #cond "\n"); \
3662                 return 1;                                               \
3663         }
3664
3665 #define CHK_NEQ(c1, c2)                                         \
3666         if ((c1) != (c2)) {                                     \
3667                 D_INFO("need full RXON - "      \
3668                                #c1 " != " #c2 " - %d != %d\n",  \
3669                                (c1), (c2));                     \
3670                 return 1;                                       \
3671         }
3672
3673         /* These items are only settable from the full RXON command */
3674         CHK(!il_is_associated_ctx(ctx));
3675         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
3676         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
3677         CHK(compare_ether_addr(staging->wlap_bssid_addr,
3678                                 active->wlap_bssid_addr));
3679         CHK_NEQ(staging->dev_type, active->dev_type);
3680         CHK_NEQ(staging->channel, active->channel);
3681         CHK_NEQ(staging->air_propagation, active->air_propagation);
3682         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3683                 active->ofdm_ht_single_stream_basic_rates);
3684         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3685                 active->ofdm_ht_dual_stream_basic_rates);
3686         CHK_NEQ(staging->assoc_id, active->assoc_id);
3687
3688         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3689          * be updated with the RXON_ASSOC command -- however only some
3690          * flag transitions are allowed using RXON_ASSOC */
3691
3692         /* Check if we are not switching bands */
3693         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3694                 active->flags & RXON_FLG_BAND_24G_MSK);
3695
3696         /* Check if we are switching association toggle */
3697         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3698                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3699
3700 #undef CHK
3701 #undef CHK_NEQ
3702
3703         return 0;
3704 }
3705 EXPORT_SYMBOL(il_full_rxon_required);
3706
3707 u8 il_get_lowest_plcp(struct il_priv *il,
3708                             struct il_rxon_context *ctx)
3709 {
3710         /*
3711          * Assign the lowest rate -- should really get this from
3712          * the beacon skb from mac80211.
3713          */
3714         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
3715                 return RATE_1M_PLCP;
3716         else
3717                 return RATE_6M_PLCP;
3718 }
3719 EXPORT_SYMBOL(il_get_lowest_plcp);
3720
3721 static void _il_set_rxon_ht(struct il_priv *il,
3722                              struct il_ht_config *ht_conf,
3723                              struct il_rxon_context *ctx)
3724 {
3725         struct il_rxon_cmd *rxon = &ctx->staging;
3726
3727         if (!ctx->ht.enabled) {
3728                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
3729                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
3730                         RXON_FLG_HT40_PROT_MSK |
3731                         RXON_FLG_HT_PROT_MSK);
3732                 return;
3733         }
3734
3735         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
3736                                         RXON_FLG_HT_OPERATING_MODE_POS);
3737
3738         /* Set up channel bandwidth:
3739          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3740         /* clear the HT channel mode before set the mode */
3741         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
3742                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3743         if (il_is_ht40_tx_allowed(il, ctx, NULL)) {
3744                 /* pure ht40 */
3745                 if (ctx->ht.protection ==
3746                                 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3747                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3748                         /* Note: control channel is opposite of extension channel */
3749                         switch (ctx->ht.extension_chan_offset) {
3750                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3751                                 rxon->flags &=
3752                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3753                                 break;
3754                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3755                                 rxon->flags |=
3756                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3757                                 break;
3758                         }
3759                 } else {
3760                         /* Note: control channel is opposite of extension channel */
3761                         switch (ctx->ht.extension_chan_offset) {
3762                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3763                                 rxon->flags &=
3764                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3765                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3766                                 break;
3767                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3768                                 rxon->flags |=
3769                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3770                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3771                                 break;
3772                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3773                         default:
3774                                 /* channel location only valid if in Mixed mode */
3775                                 IL_ERR(
3776                                         "invalid extension channel offset\n");
3777                                 break;
3778                         }
3779                 }
3780         } else {
3781                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3782         }
3783
3784         if (il->cfg->ops->hcmd->set_rxon_chain)
3785                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
3786
3787         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3788                         "extension channel offset 0x%x\n",
3789                         le32_to_cpu(rxon->flags), ctx->ht.protection,
3790                         ctx->ht.extension_chan_offset);
3791 }
3792
3793 void il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3794 {
3795         _il_set_rxon_ht(il, ht_conf, &il->ctx);
3796 }
3797 EXPORT_SYMBOL(il_set_rxon_ht);
3798
3799 /* Return valid, unused, channel for a passive scan to reset the RF */
3800 u8 il_get_single_channel_number(struct il_priv *il,
3801                                  enum ieee80211_band band)
3802 {
3803         const struct il_channel_info *ch_info;
3804         int i;
3805         u8 channel = 0;
3806         u8 min, max;
3807
3808         if (band == IEEE80211_BAND_5GHZ) {
3809                 min = 14;
3810                 max = il->channel_count;
3811         } else {
3812                 min = 0;
3813                 max = 14;
3814         }
3815
3816         for (i = min; i < max; i++) {
3817                 channel = il->channel_info[i].channel;
3818                 if (channel == le16_to_cpu(il->ctx.staging.channel))
3819                         continue;
3820
3821                 ch_info = il_get_channel_info(il, band, channel);
3822                 if (il_is_channel_valid(ch_info))
3823                         break;
3824         }
3825
3826         return channel;
3827 }
3828 EXPORT_SYMBOL(il_get_single_channel_number);
3829
3830 /**
3831  * il_set_rxon_channel - Set the band and channel values in staging RXON
3832  * @ch: requested channel as a pointer to struct ieee80211_channel
3833
3834  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3835  * in the staging RXON flag structure based on the ch->band
3836  */
3837 int
3838 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch,
3839                          struct il_rxon_context *ctx)
3840 {
3841         enum ieee80211_band band = ch->band;
3842         u16 channel = ch->hw_value;
3843
3844         if (le16_to_cpu(ctx->staging.channel) == channel && il->band == band)
3845                 return 0;
3846
3847         ctx->staging.channel = cpu_to_le16(channel);
3848         if (band == IEEE80211_BAND_5GHZ)
3849                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3850         else
3851                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3852
3853         il->band = band;
3854
3855         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3856
3857         return 0;
3858 }
3859 EXPORT_SYMBOL(il_set_rxon_channel);
3860
3861 void il_set_flags_for_band(struct il_priv *il,
3862                             struct il_rxon_context *ctx,
3863                             enum ieee80211_band band,
3864                             struct ieee80211_vif *vif)
3865 {
3866         if (band == IEEE80211_BAND_5GHZ) {
3867                 ctx->staging.flags &=
3868                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
3869                       | RXON_FLG_CCK_MSK);
3870                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3871         } else {
3872                 /* Copied from il_post_associate() */
3873                 if (vif && vif->bss_conf.use_short_slot)
3874                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3875                 else
3876                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3877
3878                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3879                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3880                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
3881         }
3882 }
3883 EXPORT_SYMBOL(il_set_flags_for_band);
3884
3885 /*
3886  * initialize rxon structure with default values from eeprom
3887  */
3888 void il_connection_init_rx_config(struct il_priv *il,
3889                                    struct il_rxon_context *ctx)
3890 {
3891         const struct il_channel_info *ch_info;
3892
3893         memset(&ctx->staging, 0, sizeof(ctx->staging));
3894
3895         if (!ctx->vif) {
3896                 ctx->staging.dev_type = ctx->unused_devtype;
3897         } else
3898         switch (ctx->vif->type) {
3899
3900         case NL80211_IFTYPE_STATION:
3901                 ctx->staging.dev_type = ctx->station_devtype;
3902                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3903                 break;
3904
3905         case NL80211_IFTYPE_ADHOC:
3906                 ctx->staging.dev_type = ctx->ibss_devtype;
3907                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3908                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
3909                                                   RXON_FILTER_ACCEPT_GRP_MSK;
3910                 break;
3911
3912         default:
3913                 IL_ERR("Unsupported interface type %d\n",
3914                         ctx->vif->type);
3915                 break;
3916         }
3917
3918 #if 0
3919         /* TODO:  Figure out when short_preamble would be set and cache from
3920          * that */
3921         if (!hw_to_local(il->hw)->short_preamble)
3922                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3923         else
3924                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3925 #endif
3926
3927         ch_info = il_get_channel_info(il, il->band,
3928                                        le16_to_cpu(ctx->active.channel));
3929
3930         if (!ch_info)
3931                 ch_info = &il->channel_info[0];
3932
3933         ctx->staging.channel = cpu_to_le16(ch_info->channel);
3934         il->band = ch_info->band;
3935
3936         il_set_flags_for_band(il, ctx, il->band, ctx->vif);
3937
3938         ctx->staging.ofdm_basic_rates =
3939             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3940         ctx->staging.cck_basic_rates =
3941             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3942
3943         /* clear both MIX and PURE40 mode flag */
3944         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
3945                                         RXON_FLG_CHANNEL_MODE_PURE_40);
3946         if (ctx->vif)
3947                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
3948
3949         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
3950         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
3951 }
3952 EXPORT_SYMBOL(il_connection_init_rx_config);
3953
3954 void il_set_rate(struct il_priv *il)
3955 {
3956         const struct ieee80211_supported_band *hw = NULL;
3957         struct ieee80211_rate *rate;
3958         int i;
3959
3960         hw = il_get_hw_mode(il, il->band);
3961         if (!hw) {
3962                 IL_ERR("Failed to set rate: unable to get hw mode\n");
3963                 return;
3964         }
3965
3966         il->active_rate = 0;
3967
3968         for (i = 0; i < hw->n_bitrates; i++) {
3969                 rate = &(hw->bitrates[i]);
3970                 if (rate->hw_value < RATE_COUNT_LEGACY)
3971                         il->active_rate |= (1 << rate->hw_value);
3972         }
3973
3974         D_RATE("Set active_rate = %0x\n", il->active_rate);
3975
3976         il->ctx.staging.cck_basic_rates =
3977                     (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3978
3979         il->ctx.staging.ofdm_basic_rates =
3980                    (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3981 }
3982 EXPORT_SYMBOL(il_set_rate);
3983
3984 void il_chswitch_done(struct il_priv *il, bool is_success)
3985 {
3986         struct il_rxon_context *ctx = &il->ctx;
3987
3988         if (test_bit(S_EXIT_PENDING, &il->status))
3989                 return;
3990
3991         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
3992                 ieee80211_chswitch_done(ctx->vif, is_success);
3993 }
3994 EXPORT_SYMBOL(il_chswitch_done);
3995
3996 void il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
3997 {
3998         struct il_rx_pkt *pkt = rxb_addr(rxb);
3999         struct il_csa_notification *csa = &(pkt->u.csa_notif);
4000
4001         struct il_rxon_context *ctx = &il->ctx;
4002         struct il_rxon_cmd *rxon = (void *)&ctx->active;
4003
4004         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4005                 return;
4006
4007         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4008                 rxon->channel = csa->channel;
4009                 ctx->staging.channel = csa->channel;
4010                 D_11H("CSA notif: channel %d\n",
4011                               le16_to_cpu(csa->channel));
4012                 il_chswitch_done(il, true);
4013         } else {
4014                 IL_ERR("CSA notif (fail) : channel %d\n",
4015                         le16_to_cpu(csa->channel));
4016                 il_chswitch_done(il, false);
4017         }
4018 }
4019 EXPORT_SYMBOL(il_hdl_csa);
4020
4021 #ifdef CONFIG_IWLEGACY_DEBUG
4022 void il_print_rx_config_cmd(struct il_priv *il,
4023                              struct il_rxon_context *ctx)
4024 {
4025         struct il_rxon_cmd *rxon = &ctx->staging;
4026
4027         D_RADIO("RX CONFIG:\n");
4028         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4029         D_RADIO("u16 channel: 0x%x\n",
4030                                 le16_to_cpu(rxon->channel));
4031         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4032         D_RADIO("u32 filter_flags: 0x%08x\n",
4033                                 le32_to_cpu(rxon->filter_flags));
4034         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4035         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4036                         rxon->ofdm_basic_rates);
4037         D_RADIO("u8 cck_basic_rates: 0x%02x\n",
4038                                 rxon->cck_basic_rates);
4039         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4040         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4041         D_RADIO("u16 assoc_id: 0x%x\n",
4042                                 le16_to_cpu(rxon->assoc_id));
4043 }
4044 EXPORT_SYMBOL(il_print_rx_config_cmd);
4045 #endif
4046 /**
4047  * il_irq_handle_error - called for HW or SW error interrupt from card
4048  */
4049 void il_irq_handle_error(struct il_priv *il)
4050 {
4051         /* Set the FW error flag -- cleared on il_down */
4052         set_bit(S_FW_ERROR, &il->status);
4053
4054         /* Cancel currently queued command. */
4055         clear_bit(S_HCMD_ACTIVE, &il->status);
4056
4057         IL_ERR("Loaded firmware version: %s\n",
4058                 il->hw->wiphy->fw_version);
4059
4060         il->cfg->ops->lib->dump_nic_error_log(il);
4061         if (il->cfg->ops->lib->dump_fh)
4062                 il->cfg->ops->lib->dump_fh(il, NULL, false);
4063 #ifdef CONFIG_IWLEGACY_DEBUG
4064         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4065                 il_print_rx_config_cmd(il,
4066                                         &il->ctx);
4067 #endif
4068
4069         wake_up(&il->wait_command_queue);
4070
4071         /* Keep the restart process from trying to send host
4072          * commands by clearing the INIT status bit */
4073         clear_bit(S_READY, &il->status);
4074
4075         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4076                 IL_DBG(IL_DL_FW_ERRORS,
4077                           "Restarting adapter due to uCode error.\n");
4078
4079                 if (il->cfg->mod_params->restart_fw)
4080                         queue_work(il->workqueue, &il->restart);
4081         }
4082 }
4083 EXPORT_SYMBOL(il_irq_handle_error);
4084
4085 static int il_apm_stop_master(struct il_priv *il)
4086 {
4087         int ret = 0;
4088
4089         /* stop device's busmaster DMA activity */
4090         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4091
4092         ret = _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4093                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4094         if (ret)
4095                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4096
4097         D_INFO("stop master\n");
4098
4099         return ret;
4100 }
4101
4102 void il_apm_stop(struct il_priv *il)
4103 {
4104         D_INFO("Stop card, put in low power state\n");
4105
4106         /* Stop device's DMA activity */
4107         il_apm_stop_master(il);
4108
4109         /* Reset the entire device */
4110         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4111
4112         udelay(10);
4113
4114         /*
4115          * Clear "initialization complete" bit to move adapter from
4116          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4117          */
4118         il_clear_bit(il, CSR_GP_CNTRL,
4119                                 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4120 }
4121 EXPORT_SYMBOL(il_apm_stop);
4122
4123
4124 /*
4125  * Start up NIC's basic functionality after it has been reset
4126  * (e.g. after platform boot, or shutdown via il_apm_stop())
4127  * NOTE:  This does not load uCode nor start the embedded processor
4128  */
4129 int il_apm_init(struct il_priv *il)
4130 {
4131         int ret = 0;
4132         u16 lctl;
4133
4134         D_INFO("Init card's basic functions\n");
4135
4136         /*
4137          * Use "set_bit" below rather than "write", to preserve any hardware
4138          * bits already set by default after reset.
4139          */
4140
4141         /* Disable L0S exit timer (platform NMI Work/Around) */
4142         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4143                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4144
4145         /*
4146          * Disable L0s without affecting L1;
4147          *  don't wait for ICH L0s (ICH bug W/A)
4148          */
4149         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4150                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4151
4152         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4153         il_set_bit(il, CSR_DBG_HPET_MEM_REG,
4154                                         CSR_DBG_HPET_MEM_REG_VAL);
4155
4156         /*
4157          * Enable HAP INTA (interrupt from management bus) to
4158          * wake device's PCI Express link L1a -> L0s
4159          * NOTE:  This is no-op for 3945 (non-existent bit)
4160          */
4161         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4162                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4163
4164         /*
4165          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4166          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4167          * If so (likely), disable L0S, so device moves directly L0->L1;
4168          *    costs negligible amount of power savings.
4169          * If not (unlikely), enable L0S, so there is at least some
4170          *    power savings, even without L1.
4171          */
4172         if (il->cfg->base_params->set_l0s) {
4173                 lctl = il_pcie_link_ctl(il);
4174                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4175                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4176                         /* L1-ASPM enabled; disable(!) L0S  */
4177                         il_set_bit(il, CSR_GIO_REG,
4178                                         CSR_GIO_REG_VAL_L0S_ENABLED);
4179                         D_POWER("L1 Enabled; Disabling L0S\n");
4180                 } else {
4181                         /* L1-ASPM disabled; enable(!) L0S */
4182                         il_clear_bit(il, CSR_GIO_REG,
4183                                         CSR_GIO_REG_VAL_L0S_ENABLED);
4184                         D_POWER("L1 Disabled; Enabling L0S\n");
4185                 }
4186         }
4187
4188         /* Configure analog phase-lock-loop before activating to D0A */
4189         if (il->cfg->base_params->pll_cfg_val)
4190                 il_set_bit(il, CSR_ANA_PLL_CFG,
4191                             il->cfg->base_params->pll_cfg_val);
4192
4193         /*
4194          * Set "initialization complete" bit to move adapter from
4195          * D0U* --> D0A* (powered-up active) state.
4196          */
4197         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4198
4199         /*
4200          * Wait for clock stabilization; once stabilized, access to
4201          * device-internal resources is supported, e.g. il_wr_prph()
4202          * and accesses to uCode SRAM.
4203          */
4204         ret = _il_poll_bit(il, CSR_GP_CNTRL,
4205                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4206                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4207         if (ret < 0) {
4208                 D_INFO("Failed to init the card\n");
4209                 goto out;
4210         }
4211
4212         /*
4213          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4214          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4215          *
4216          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4217          * do not disable clocks.  This preserves any hardware bits already
4218          * set by default in "CLK_CTRL_REG" after reset.
4219          */
4220         if (il->cfg->base_params->use_bsm)
4221                 il_wr_prph(il, APMG_CLK_EN_REG,
4222                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4223         else
4224                 il_wr_prph(il, APMG_CLK_EN_REG,
4225                         APMG_CLK_VAL_DMA_CLK_RQT);
4226         udelay(20);
4227
4228         /* Disable L1-Active */
4229         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4230                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4231
4232 out:
4233         return ret;
4234 }
4235 EXPORT_SYMBOL(il_apm_init);
4236
4237
4238 int il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4239 {
4240         int ret;
4241         s8 prev_tx_power;
4242         bool defer;
4243         struct il_rxon_context *ctx = &il->ctx;
4244
4245         lockdep_assert_held(&il->mutex);
4246
4247         if (il->tx_power_user_lmt == tx_power && !force)
4248                 return 0;
4249
4250         if (!il->cfg->ops->lib->send_tx_power)
4251                 return -EOPNOTSUPP;
4252
4253         /* 0 dBm mean 1 milliwatt */
4254         if (tx_power < 0) {
4255                 IL_WARN(
4256                          "Requested user TXPOWER %d below 1 mW.\n",
4257                          tx_power);
4258                 return -EINVAL;
4259         }
4260
4261         if (tx_power > il->tx_power_device_lmt) {
4262                 IL_WARN(
4263                         "Requested user TXPOWER %d above upper limit %d.\n",
4264                          tx_power, il->tx_power_device_lmt);
4265                 return -EINVAL;
4266         }
4267
4268         if (!il_is_ready_rf(il))
4269                 return -EIO;
4270
4271         /* scan complete and commit_rxon use tx_power_next value,
4272          * it always need to be updated for newest request */
4273         il->tx_power_next = tx_power;
4274
4275         /* do not set tx power when scanning or channel changing */
4276         defer = test_bit(S_SCANNING, &il->status) ||
4277                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
4278         if (defer && !force) {
4279                 D_INFO("Deferring tx power set\n");
4280                 return 0;
4281         }
4282
4283         prev_tx_power = il->tx_power_user_lmt;
4284         il->tx_power_user_lmt = tx_power;
4285
4286         ret = il->cfg->ops->lib->send_tx_power(il);
4287
4288         /* if fail to set tx_power, restore the orig. tx power */
4289         if (ret) {
4290                 il->tx_power_user_lmt = prev_tx_power;
4291                 il->tx_power_next = prev_tx_power;
4292         }
4293         return ret;
4294 }
4295 EXPORT_SYMBOL(il_set_tx_power);
4296
4297 void il_send_bt_config(struct il_priv *il)
4298 {
4299         struct il_bt_cmd bt_cmd = {
4300                 .lead_time = BT_LEAD_TIME_DEF,
4301                 .max_kill = BT_MAX_KILL_DEF,
4302                 .kill_ack_mask = 0,
4303                 .kill_cts_mask = 0,
4304         };
4305
4306         if (!bt_coex_active)
4307                 bt_cmd.flags = BT_COEX_DISABLE;
4308         else
4309                 bt_cmd.flags = BT_COEX_ENABLE;
4310
4311         D_INFO("BT coex %s\n",
4312                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4313
4314         if (il_send_cmd_pdu(il, C_BT_CONFIG,
4315                              sizeof(struct il_bt_cmd), &bt_cmd))
4316                 IL_ERR("failed to send BT Coex Config\n");
4317 }
4318 EXPORT_SYMBOL(il_send_bt_config);
4319
4320 int il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4321 {
4322         struct il_stats_cmd stats_cmd = {
4323                 .configuration_flags =
4324                         clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4325         };
4326
4327         if (flags & CMD_ASYNC)
4328                 return il_send_cmd_pdu_async(il, C_STATS,
4329                                         sizeof(struct il_stats_cmd),
4330                                         &stats_cmd, NULL);
4331         else
4332                 return il_send_cmd_pdu(il, C_STATS,
4333                                         sizeof(struct il_stats_cmd),
4334                                         &stats_cmd);
4335 }
4336 EXPORT_SYMBOL(il_send_stats_request);
4337
4338 void il_hdl_pm_sleep(struct il_priv *il,
4339                            struct il_rx_buf *rxb)
4340 {
4341 #ifdef CONFIG_IWLEGACY_DEBUG
4342         struct il_rx_pkt *pkt = rxb_addr(rxb);
4343         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4344         D_RX("sleep mode: %d, src: %d\n",
4345                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4346 #endif
4347 }
4348 EXPORT_SYMBOL(il_hdl_pm_sleep);
4349
4350 void il_hdl_pm_debug_stats(struct il_priv *il,
4351                                       struct il_rx_buf *rxb)
4352 {
4353         struct il_rx_pkt *pkt = rxb_addr(rxb);
4354         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
4355         D_RADIO("Dumping %d bytes of unhandled "
4356                         "notification for %s:\n", len,
4357                         il_get_cmd_string(pkt->hdr.cmd));
4358         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4359 }
4360 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4361
4362 void il_hdl_error(struct il_priv *il,
4363                         struct il_rx_buf *rxb)
4364 {
4365         struct il_rx_pkt *pkt = rxb_addr(rxb);
4366
4367         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4368                 "seq 0x%04X ser 0x%08X\n",
4369                 le32_to_cpu(pkt->u.err_resp.error_type),
4370                 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4371                 pkt->u.err_resp.cmd_id,
4372                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4373                 le32_to_cpu(pkt->u.err_resp.error_info));
4374 }
4375 EXPORT_SYMBOL(il_hdl_error);
4376
4377 void il_clear_isr_stats(struct il_priv *il)
4378 {
4379         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4380 }
4381
4382 int il_mac_conf_tx(struct ieee80211_hw *hw,
4383                            struct ieee80211_vif *vif, u16 queue,
4384                            const struct ieee80211_tx_queue_params *params)
4385 {
4386         struct il_priv *il = hw->priv;
4387         unsigned long flags;
4388         int q;
4389
4390         D_MAC80211("enter\n");
4391
4392         if (!il_is_ready_rf(il)) {
4393                 D_MAC80211("leave - RF not ready\n");
4394                 return -EIO;
4395         }
4396
4397         if (queue >= AC_NUM) {
4398                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4399                 return 0;
4400         }
4401
4402         q = AC_NUM - 1 - queue;
4403
4404         spin_lock_irqsave(&il->lock, flags);
4405
4406         il->ctx.qos_data.def_qos_parm.ac[q].cw_min =
4407                         cpu_to_le16(params->cw_min);
4408         il->ctx.qos_data.def_qos_parm.ac[q].cw_max =
4409                         cpu_to_le16(params->cw_max);
4410         il->ctx.qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4411         il->ctx.qos_data.def_qos_parm.ac[q].edca_txop =
4412                                 cpu_to_le16((params->txop * 32));
4413
4414         il->ctx.qos_data.def_qos_parm.ac[q].reserved1 = 0;
4415
4416         spin_unlock_irqrestore(&il->lock, flags);
4417
4418         D_MAC80211("leave\n");
4419         return 0;
4420 }
4421 EXPORT_SYMBOL(il_mac_conf_tx);
4422
4423 int il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4424 {
4425         struct il_priv *il = hw->priv;
4426
4427         return il->ibss_manager == IL_IBSS_MANAGER;
4428 }
4429 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4430
4431 static int
4432 il_set_mode(struct il_priv *il, struct il_rxon_context *ctx)
4433 {
4434         il_connection_init_rx_config(il, ctx);
4435
4436         if (il->cfg->ops->hcmd->set_rxon_chain)
4437                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
4438
4439         return il_commit_rxon(il, ctx);
4440 }
4441
4442 static int il_setup_interface(struct il_priv *il,
4443                                struct il_rxon_context *ctx)
4444 {
4445         struct ieee80211_vif *vif = ctx->vif;
4446         int err;
4447
4448         lockdep_assert_held(&il->mutex);
4449
4450         /*
4451          * This variable will be correct only when there's just
4452          * a single context, but all code using it is for hardware
4453          * that supports only one context.
4454          */
4455         il->iw_mode = vif->type;
4456
4457         ctx->is_active = true;
4458
4459         err = il_set_mode(il, ctx);
4460         if (err) {
4461                 if (!ctx->always_active)
4462                         ctx->is_active = false;
4463                 return err;
4464         }
4465
4466         return 0;
4467 }
4468
4469 int
4470 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4471 {
4472         struct il_priv *il = hw->priv;
4473         struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
4474         int err;
4475         u32 modes;
4476
4477         D_MAC80211("enter: type %d, addr %pM\n",
4478                            vif->type, vif->addr);
4479
4480         mutex_lock(&il->mutex);
4481
4482         if (!il_is_ready_rf(il)) {
4483                 IL_WARN("Try to add interface when device not ready\n");
4484                 err = -EINVAL;
4485                 goto out;
4486         }
4487
4488
4489         /* check if busy context is exclusive */
4490         if (il->ctx.vif &&
4491             (il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type))) {
4492                 err = -EINVAL;
4493                 goto out;
4494         }
4495
4496         modes = il->ctx.interface_modes | il->ctx.exclusive_interface_modes;
4497         if (!(modes & BIT(vif->type))) {
4498                 err = -EOPNOTSUPP;
4499                 goto out;
4500         }
4501
4502         vif_priv->ctx = &il->ctx;
4503         il->ctx.vif = vif;
4504
4505         err = il_setup_interface(il, &il->ctx);
4506         if (err) {
4507                 il->ctx.vif = NULL;
4508                 il->iw_mode = NL80211_IFTYPE_STATION;
4509         }
4510
4511  out:
4512         mutex_unlock(&il->mutex);
4513
4514         D_MAC80211("leave\n");
4515         return err;
4516 }
4517 EXPORT_SYMBOL(il_mac_add_interface);
4518
4519 static void il_teardown_interface(struct il_priv *il,
4520                                    struct ieee80211_vif *vif,
4521                                    bool mode_change)
4522 {
4523         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
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, ctx);
4534                 if (!ctx->always_active)
4535                         ctx->is_active = false;
4536         }
4537 }
4538
4539 void il_mac_remove_interface(struct ieee80211_hw *hw,
4540                               struct ieee80211_vif *vif)
4541 {
4542         struct il_priv *il = hw->priv;
4543         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4544
4545         D_MAC80211("enter\n");
4546
4547         mutex_lock(&il->mutex);
4548
4549         WARN_ON(ctx->vif != vif);
4550         ctx->vif = NULL;
4551
4552         il_teardown_interface(il, vif, false);
4553
4554         memset(il->bssid, 0, ETH_ALEN);
4555         mutex_unlock(&il->mutex);
4556
4557         D_MAC80211("leave\n");
4558
4559 }
4560 EXPORT_SYMBOL(il_mac_remove_interface);
4561
4562 int il_alloc_txq_mem(struct il_priv *il)
4563 {
4564         if (!il->txq)
4565                 il->txq = kzalloc(
4566                         sizeof(struct il_tx_queue) *
4567                                 il->cfg->base_params->num_of_queues,
4568                         GFP_KERNEL);
4569         if (!il->txq) {
4570                 IL_ERR("Not enough memory for txq\n");
4571                 return -ENOMEM;
4572         }
4573         return 0;
4574 }
4575 EXPORT_SYMBOL(il_alloc_txq_mem);
4576
4577 void il_txq_mem(struct il_priv *il)
4578 {
4579         kfree(il->txq);
4580         il->txq = NULL;
4581 }
4582 EXPORT_SYMBOL(il_txq_mem);
4583
4584 #ifdef CONFIG_IWLEGACY_DEBUGFS
4585
4586 #define IL_TRAFFIC_DUMP_SIZE    (IL_TRAFFIC_ENTRY_SIZE * IL_TRAFFIC_ENTRIES)
4587
4588 void il_reset_traffic_log(struct il_priv *il)
4589 {
4590         il->tx_traffic_idx = 0;
4591         il->rx_traffic_idx = 0;
4592         if (il->tx_traffic)
4593                 memset(il->tx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4594         if (il->rx_traffic)
4595                 memset(il->rx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4596 }
4597
4598 int 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 =
4605                                 kzalloc(traffic_size, GFP_KERNEL);
4606                         if (!il->tx_traffic)
4607                                 return -ENOMEM;
4608                 }
4609         }
4610         if (il_debug_level & IL_DL_RX) {
4611                 if (!il->rx_traffic) {
4612                         il->rx_traffic =
4613                                 kzalloc(traffic_size, GFP_KERNEL);
4614                         if (!il->rx_traffic)
4615                                 return -ENOMEM;
4616                 }
4617         }
4618         il_reset_traffic_log(il);
4619         return 0;
4620 }
4621 EXPORT_SYMBOL(il_alloc_traffic_mem);
4622
4623 void il_free_traffic_mem(struct il_priv *il)
4624 {
4625         kfree(il->tx_traffic);
4626         il->tx_traffic = NULL;
4627
4628         kfree(il->rx_traffic);
4629         il->rx_traffic = NULL;
4630 }
4631 EXPORT_SYMBOL(il_free_traffic_mem);
4632
4633 void il_dbg_log_tx_data_frame(struct il_priv *il,
4634                       u16 length, 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 = (length > IL_TRAFFIC_ENTRY_SIZE)
4648                        ? IL_TRAFFIC_ENTRY_SIZE : length;
4649                 memcpy((il->tx_traffic +
4650                        (il->tx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)),
4651                        header, len);
4652                 il->tx_traffic_idx =
4653                         (il->tx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4654         }
4655 }
4656 EXPORT_SYMBOL(il_dbg_log_tx_data_frame);
4657
4658 void il_dbg_log_rx_data_frame(struct il_priv *il,
4659                       u16 length, struct ieee80211_hdr *header)
4660 {
4661         __le16 fc;
4662         u16 len;
4663
4664         if (likely(!(il_debug_level & IL_DL_RX)))
4665                 return;
4666
4667         if (!il->rx_traffic)
4668                 return;
4669
4670         fc = header->frame_control;
4671         if (ieee80211_is_data(fc)) {
4672                 len = (length > IL_TRAFFIC_ENTRY_SIZE)
4673                        ? IL_TRAFFIC_ENTRY_SIZE : length;
4674                 memcpy((il->rx_traffic +
4675                        (il->rx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)),
4676                        header, len);
4677                 il->rx_traffic_idx =
4678                         (il->rx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4679         }
4680 }
4681 EXPORT_SYMBOL(il_dbg_log_rx_data_frame);
4682
4683 const char *il_get_mgmt_string(int cmd)
4684 {
4685         switch (cmd) {
4686                 IL_CMD(MANAGEMENT_ASSOC_REQ);
4687                 IL_CMD(MANAGEMENT_ASSOC_RESP);
4688                 IL_CMD(MANAGEMENT_REASSOC_REQ);
4689                 IL_CMD(MANAGEMENT_REASSOC_RESP);
4690                 IL_CMD(MANAGEMENT_PROBE_REQ);
4691                 IL_CMD(MANAGEMENT_PROBE_RESP);
4692                 IL_CMD(MANAGEMENT_BEACON);
4693                 IL_CMD(MANAGEMENT_ATIM);
4694                 IL_CMD(MANAGEMENT_DISASSOC);
4695                 IL_CMD(MANAGEMENT_AUTH);
4696                 IL_CMD(MANAGEMENT_DEAUTH);
4697                 IL_CMD(MANAGEMENT_ACTION);
4698         default:
4699                 return "UNKNOWN";
4700
4701         }
4702 }
4703
4704 const char *il_get_ctrl_string(int cmd)
4705 {
4706         switch (cmd) {
4707                 IL_CMD(CONTROL_BACK_REQ);
4708                 IL_CMD(CONTROL_BACK);
4709                 IL_CMD(CONTROL_PSPOLL);
4710                 IL_CMD(CONTROL_RTS);
4711                 IL_CMD(CONTROL_CTS);
4712                 IL_CMD(CONTROL_ACK);
4713                 IL_CMD(CONTROL_CFEND);
4714                 IL_CMD(CONTROL_CFENDACK);
4715         default:
4716                 return "UNKNOWN";
4717
4718         }
4719 }
4720
4721 void il_clear_traffic_stats(struct il_priv *il)
4722 {
4723         memset(&il->tx_stats, 0, sizeof(struct traffic_stats));
4724         memset(&il->rx_stats, 0, sizeof(struct traffic_stats));
4725 }
4726
4727 /*
4728  * if CONFIG_IWLEGACY_DEBUGFS defined,
4729  * il_update_stats function will
4730  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
4731  * Use debugFs to display the rx/rx_stats
4732  * if CONFIG_IWLEGACY_DEBUGFS not being defined, then no MGMT and CTRL
4733  * information will be recorded, but DATA pkt still will be recorded
4734  * for the reason of il_led.c need to control the led blinking based on
4735  * number of tx and rx data.
4736  *
4737  */
4738 void
4739 il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
4740 {
4741         struct traffic_stats    *stats;
4742
4743         if (is_tx)
4744                 stats = &il->tx_stats;
4745         else
4746                 stats = &il->rx_stats;
4747
4748         if (ieee80211_is_mgmt(fc)) {
4749                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4750                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
4751                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
4752                         break;
4753                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
4754                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
4755                         break;
4756                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
4757                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
4758                         break;
4759                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
4760                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
4761                         break;
4762                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
4763                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
4764                         break;
4765                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
4766                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
4767                         break;
4768                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
4769                         stats->mgmt[MANAGEMENT_BEACON]++;
4770                         break;
4771                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
4772                         stats->mgmt[MANAGEMENT_ATIM]++;
4773                         break;
4774                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
4775                         stats->mgmt[MANAGEMENT_DISASSOC]++;
4776                         break;
4777                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
4778                         stats->mgmt[MANAGEMENT_AUTH]++;
4779                         break;
4780                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
4781                         stats->mgmt[MANAGEMENT_DEAUTH]++;
4782                         break;
4783                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
4784                         stats->mgmt[MANAGEMENT_ACTION]++;
4785                         break;
4786                 }
4787         } else if (ieee80211_is_ctl(fc)) {
4788                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4789                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
4790                         stats->ctrl[CONTROL_BACK_REQ]++;
4791                         break;
4792                 case cpu_to_le16(IEEE80211_STYPE_BACK):
4793                         stats->ctrl[CONTROL_BACK]++;
4794                         break;
4795                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
4796                         stats->ctrl[CONTROL_PSPOLL]++;
4797                         break;
4798                 case cpu_to_le16(IEEE80211_STYPE_RTS):
4799                         stats->ctrl[CONTROL_RTS]++;
4800                         break;
4801                 case cpu_to_le16(IEEE80211_STYPE_CTS):
4802                         stats->ctrl[CONTROL_CTS]++;
4803                         break;
4804                 case cpu_to_le16(IEEE80211_STYPE_ACK):
4805                         stats->ctrl[CONTROL_ACK]++;
4806                         break;
4807                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
4808                         stats->ctrl[CONTROL_CFEND]++;
4809                         break;
4810                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
4811                         stats->ctrl[CONTROL_CFENDACK]++;
4812                         break;
4813                 }
4814         } else {
4815                 /* data */
4816                 stats->data_cnt++;
4817                 stats->data_bytes += len;
4818         }
4819 }
4820 EXPORT_SYMBOL(il_update_stats);
4821 #endif
4822
4823 int il_force_reset(struct il_priv *il, bool external)
4824 {
4825         struct il_force_reset *force_reset;
4826
4827         if (test_bit(S_EXIT_PENDING, &il->status))
4828                 return -EINVAL;
4829
4830         force_reset = &il->force_reset;
4831         force_reset->reset_request_count++;
4832         if (!external) {
4833                 if (force_reset->last_force_reset_jiffies &&
4834                     time_after(force_reset->last_force_reset_jiffies +
4835                     force_reset->reset_duration, jiffies)) {
4836                         D_INFO("force reset rejected\n");
4837                         force_reset->reset_reject_count++;
4838                         return -EAGAIN;
4839                 }
4840         }
4841         force_reset->reset_success_count++;
4842         force_reset->last_force_reset_jiffies = jiffies;
4843
4844         /*
4845          * if the request is from external(ex: debugfs),
4846          * then always perform the request in regardless the module
4847          * parameter setting
4848          * if the request is from internal (uCode error or driver
4849          * detect failure), then fw_restart module parameter
4850          * need to be check before performing firmware reload
4851          */
4852
4853         if (!external && !il->cfg->mod_params->restart_fw) {
4854                 D_INFO("Cancel firmware reload based on "
4855                                "module parameter setting\n");
4856                 return 0;
4857         }
4858
4859         IL_ERR("On demand firmware reload\n");
4860
4861         /* Set the FW error flag -- cleared on il_down */
4862         set_bit(S_FW_ERROR, &il->status);
4863         wake_up(&il->wait_command_queue);
4864         /*
4865          * Keep the restart process from trying to send host
4866          * commands by clearing the INIT status bit
4867          */
4868         clear_bit(S_READY, &il->status);
4869         queue_work(il->workqueue, &il->restart);
4870
4871         return 0;
4872 }
4873
4874 int
4875 il_mac_change_interface(struct ieee80211_hw *hw,
4876                         struct ieee80211_vif *vif,
4877                         enum nl80211_iftype newtype, bool newp2p)
4878 {
4879         struct il_priv *il = hw->priv;
4880         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4881         u32 modes;
4882         int err;
4883
4884         newtype = ieee80211_iftype_p2p(newtype, newp2p);
4885
4886         mutex_lock(&il->mutex);
4887
4888         if (!ctx->vif || !il_is_ready_rf(il)) {
4889                 /*
4890                  * Huh? But wait ... this can maybe happen when
4891                  * we're in the middle of a firmware restart!
4892                  */
4893                 err = -EBUSY;
4894                 goto out;
4895         }
4896
4897         modes = ctx->interface_modes | ctx->exclusive_interface_modes;
4898         if (!(modes & BIT(newtype))) {
4899                 err = -EOPNOTSUPP;
4900                 goto out;
4901         }
4902
4903         if ((il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type)) ||
4904             (il->ctx.exclusive_interface_modes & BIT(newtype))) {
4905                 err = -EINVAL;
4906                 goto out;
4907         }
4908
4909         /* success */
4910         il_teardown_interface(il, vif, true);
4911         vif->type = newtype;
4912         vif->p2p = newp2p;
4913         err = il_setup_interface(il, ctx);
4914         WARN_ON(err);
4915         /*
4916          * We've switched internally, but submitting to the
4917          * device may have failed for some reason. Mask this
4918          * error, because otherwise mac80211 will not switch
4919          * (and set the interface type back) and we'll be
4920          * out of sync with it.
4921          */
4922         err = 0;
4923
4924  out:
4925         mutex_unlock(&il->mutex);
4926         return err;
4927 }
4928 EXPORT_SYMBOL(il_mac_change_interface);
4929
4930 /*
4931  * On every watchdog tick we check (latest) time stamp. If it does not
4932  * change during timeout period and queue is not empty we reset firmware.
4933  */
4934 static int il_check_stuck_queue(struct il_priv *il, int cnt)
4935 {
4936         struct il_tx_queue *txq = &il->txq[cnt];
4937         struct il_queue *q = &txq->q;
4938         unsigned long timeout;
4939         int ret;
4940
4941         if (q->read_ptr == q->write_ptr) {
4942                 txq->time_stamp = jiffies;
4943                 return 0;
4944         }
4945
4946         timeout = txq->time_stamp +
4947                   msecs_to_jiffies(il->cfg->base_params->wd_timeout);
4948
4949         if (time_after(jiffies, timeout)) {
4950                 IL_ERR("Queue %d stuck for %u ms.\n",
4951                                 q->id, il->cfg->base_params->wd_timeout);
4952                 ret = il_force_reset(il, false);
4953                 return (ret == -EAGAIN) ? 0 : 1;
4954         }
4955
4956         return 0;
4957 }
4958
4959 /*
4960  * Making watchdog tick be a quarter of timeout assure we will
4961  * discover the queue hung between timeout and 1.25*timeout
4962  */
4963 #define IL_WD_TICK(timeout) ((timeout) / 4)
4964
4965 /*
4966  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4967  * we reset the firmware. If everything is fine just rearm the timer.
4968  */
4969 void il_bg_watchdog(unsigned long data)
4970 {
4971         struct il_priv *il = (struct il_priv *)data;
4972         int cnt;
4973         unsigned long timeout;
4974
4975         if (test_bit(S_EXIT_PENDING, &il->status))
4976                 return;
4977
4978         timeout = il->cfg->base_params->wd_timeout;
4979         if (timeout == 0)
4980                 return;
4981
4982         /* monitor and check for stuck cmd queue */
4983         if (il_check_stuck_queue(il, il->cmd_queue))
4984                 return;
4985
4986         /* monitor and check for other stuck queues */
4987         if (il_is_any_associated(il)) {
4988                 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4989                         /* skip as we already checked the command queue */
4990                         if (cnt == il->cmd_queue)
4991                                 continue;
4992                         if (il_check_stuck_queue(il, cnt))
4993                                 return;
4994                 }
4995         }
4996
4997         mod_timer(&il->watchdog, jiffies +
4998                   msecs_to_jiffies(IL_WD_TICK(timeout)));
4999 }
5000 EXPORT_SYMBOL(il_bg_watchdog);
5001
5002 void il_setup_watchdog(struct il_priv *il)
5003 {
5004         unsigned int timeout = il->cfg->base_params->wd_timeout;
5005
5006         if (timeout)
5007                 mod_timer(&il->watchdog,
5008                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
5009         else
5010                 del_timer(&il->watchdog);
5011 }
5012 EXPORT_SYMBOL(il_setup_watchdog);
5013
5014 /*
5015  * extended beacon time format
5016  * time in usec will be changed into a 32-bit value in extended:internal format
5017  * the extended part is the beacon counts
5018  * the internal part is the time in usec within one beacon interval
5019  */
5020 u32
5021 il_usecs_to_beacons(struct il_priv *il,
5022                                         u32 usec, u32 beacon_interval)
5023 {
5024         u32 quot;
5025         u32 rem;
5026         u32 interval = beacon_interval * TIME_UNIT;
5027
5028         if (!interval || !usec)
5029                 return 0;
5030
5031         quot = (usec / interval) &
5032                 (il_beacon_time_mask_high(il,
5033                 il->hw_params.beacon_time_tsf_bits) >>
5034                 il->hw_params.beacon_time_tsf_bits);
5035         rem = (usec % interval) & il_beacon_time_mask_low(il,
5036                                    il->hw_params.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 il_add_beacon_time(struct il_priv *il, u32 base,
5046                            u32 addon, u32 beacon_interval)
5047 {
5048         u32 base_low = base & il_beacon_time_mask_low(il,
5049                                         il->hw_params.beacon_time_tsf_bits);
5050         u32 addon_low = addon & il_beacon_time_mask_low(il,
5051                                         il->hw_params.beacon_time_tsf_bits);
5052         u32 interval = beacon_interval * TIME_UNIT;
5053         u32 res = (base & il_beacon_time_mask_high(il,
5054                                 il->hw_params.beacon_time_tsf_bits)) +
5055                                 (addon & il_beacon_time_mask_high(il,
5056                                 il->hw_params.beacon_time_tsf_bits));
5057
5058         if (base_low > addon_low)
5059                 res += base_low - addon_low;
5060         else if (base_low < addon_low) {
5061                 res += interval + base_low - addon_low;
5062                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5063         } else
5064                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5065
5066         return cpu_to_le32(res);
5067 }
5068 EXPORT_SYMBOL(il_add_beacon_time);
5069
5070 #ifdef CONFIG_PM
5071
5072 int il_pci_suspend(struct device *device)
5073 {
5074         struct pci_dev *pdev = to_pci_dev(device);
5075         struct il_priv *il = pci_get_drvdata(pdev);
5076
5077         /*
5078          * This function is called when system goes into suspend state
5079          * mac80211 will call il_mac_stop() from the mac80211 suspend function
5080          * first but since il_mac_stop() has no knowledge of who the caller is,
5081          * it will not call apm_ops.stop() to stop the DMA operation.
5082          * Calling apm_ops.stop here to make sure we stop the DMA.
5083          */
5084         il_apm_stop(il);
5085
5086         return 0;
5087 }
5088 EXPORT_SYMBOL(il_pci_suspend);
5089
5090 int il_pci_resume(struct device *device)
5091 {
5092         struct pci_dev *pdev = to_pci_dev(device);
5093         struct il_priv *il = pci_get_drvdata(pdev);
5094         bool hw_rfkill = false;
5095
5096         /*
5097          * We disable the RETRY_TIMEOUT register (0x41) to keep
5098          * PCI Tx retries from interfering with C3 CPU state.
5099          */
5100         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
5101
5102         il_enable_interrupts(il);
5103
5104         if (!(_il_rd(il, CSR_GP_CNTRL) &
5105                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5106                 hw_rfkill = true;
5107
5108         if (hw_rfkill)
5109                 set_bit(S_RF_KILL_HW, &il->status);
5110         else
5111                 clear_bit(S_RF_KILL_HW, &il->status);
5112
5113         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
5114
5115         return 0;
5116 }
5117 EXPORT_SYMBOL(il_pci_resume);
5118
5119 const struct dev_pm_ops il_pm_ops = {
5120         .suspend = il_pci_suspend,
5121         .resume = il_pci_resume,
5122         .freeze = il_pci_suspend,
5123         .thaw = il_pci_resume,
5124         .poweroff = il_pci_suspend,
5125         .restore = il_pci_resume,
5126 };
5127 EXPORT_SYMBOL(il_pm_ops);
5128
5129 #endif /* CONFIG_PM */
5130
5131 static void
5132 il_update_qos(struct il_priv *il, struct il_rxon_context *ctx)
5133 {
5134         if (test_bit(S_EXIT_PENDING, &il->status))
5135                 return;
5136
5137         if (!ctx->is_active)
5138                 return;
5139
5140         ctx->qos_data.def_qos_parm.qos_flags = 0;
5141
5142         if (ctx->qos_data.qos_active)
5143                 ctx->qos_data.def_qos_parm.qos_flags |=
5144                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5145
5146         if (ctx->ht.enabled)
5147                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5148
5149         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5150                       ctx->qos_data.qos_active,
5151                       ctx->qos_data.def_qos_parm.qos_flags);
5152
5153         il_send_cmd_pdu_async(il, ctx->qos_cmd,
5154                                sizeof(struct il_qosparam_cmd),
5155                                &ctx->qos_data.def_qos_parm, NULL);
5156 }
5157
5158 /**
5159  * il_mac_config - mac80211 config callback
5160  */
5161 int il_mac_config(struct ieee80211_hw *hw, u32 changed)
5162 {
5163         struct il_priv *il = hw->priv;
5164         const struct il_channel_info *ch_info;
5165         struct ieee80211_conf *conf = &hw->conf;
5166         struct ieee80211_channel *channel = conf->channel;
5167         struct il_ht_config *ht_conf = &il->current_ht_config;
5168         struct il_rxon_context *ctx = &il->ctx;
5169         unsigned long flags = 0;
5170         int ret = 0;
5171         u16 ch;
5172         int scan_active = 0;
5173         bool ht_changed = false;
5174
5175         if (WARN_ON(!il->cfg->ops->legacy))
5176                 return -EOPNOTSUPP;
5177
5178         mutex_lock(&il->mutex);
5179
5180         D_MAC80211("enter to channel %d changed 0x%X\n",
5181                                         channel->hw_value, changed);
5182
5183         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5184                 scan_active = 1;
5185                 D_MAC80211("scan active\n");
5186         }
5187
5188         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
5189                        IEEE80211_CONF_CHANGE_CHANNEL)) {
5190                 /* mac80211 uses static for non-HT which is what we want */
5191                 il->current_ht_config.smps = conf->smps_mode;
5192
5193                 /*
5194                  * Recalculate chain counts.
5195                  *
5196                  * If monitor mode is enabled then mac80211 will
5197                  * set up the SM PS mode to OFF if an HT channel is
5198                  * configured.
5199                  */
5200                 if (il->cfg->ops->hcmd->set_rxon_chain)
5201                         il->cfg->ops->hcmd->set_rxon_chain(il, &il->ctx);
5202         }
5203
5204         /* during scanning mac80211 will delay channel setting until
5205          * scan finish with changed = 0
5206          */
5207         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5208
5209                 if (scan_active)
5210                         goto set_ch_out;
5211
5212                 ch = channel->hw_value;
5213                 ch_info = il_get_channel_info(il, channel->band, ch);
5214                 if (!il_is_channel_valid(ch_info)) {
5215                         D_MAC80211("leave - invalid channel\n");
5216                         ret = -EINVAL;
5217                         goto set_ch_out;
5218                 }
5219
5220                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5221                     !il_is_channel_ibss(ch_info)) {
5222                         D_MAC80211("leave - not IBSS channel\n");
5223                         ret = -EINVAL;
5224                         goto set_ch_out;
5225                 }
5226
5227                 spin_lock_irqsave(&il->lock, flags);
5228
5229                 /* Configure HT40 channels */
5230                 if (ctx->ht.enabled != conf_is_ht(conf)) {
5231                         ctx->ht.enabled = conf_is_ht(conf);
5232                         ht_changed = true;
5233                 }
5234                 if (ctx->ht.enabled) {
5235                         if (conf_is_ht40_minus(conf)) {
5236                                 ctx->ht.extension_chan_offset =
5237                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5238                                 ctx->ht.is_40mhz = true;
5239                         } else if (conf_is_ht40_plus(conf)) {
5240                                 ctx->ht.extension_chan_offset =
5241                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5242                                 ctx->ht.is_40mhz = true;
5243                         } else {
5244                                 ctx->ht.extension_chan_offset =
5245                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5246                                 ctx->ht.is_40mhz = false;
5247                         }
5248                 } else
5249                         ctx->ht.is_40mhz = false;
5250
5251                 /*
5252                  * Default to no protection. Protection mode will
5253                  * later be set from BSS config in il_ht_conf
5254                  */
5255                 ctx->ht.protection =
5256                                 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(ctx->staging.channel) != ch))
5262                         ctx->staging.flags = 0;
5263
5264                 il_set_rxon_channel(il, channel, ctx);
5265                 il_set_rxon_ht(il, ht_conf);
5266
5267                 il_set_flags_for_band(il, ctx, channel->band,
5268                                        ctx->vif);
5269
5270                 spin_unlock_irqrestore(&il->lock, flags);
5271
5272                 if (il->cfg->ops->legacy->update_bcast_stations)
5273                         ret =
5274                         il->cfg->ops->legacy->update_bcast_stations(il);
5275
5276  set_ch_out:
5277                 /* The list of supported rates and rate mask can be different
5278                  * for each band; since the band may have changed, reset
5279                  * the rate mask to what mac80211 lists */
5280                 il_set_rate(il);
5281         }
5282
5283         if (changed & (IEEE80211_CONF_CHANGE_PS |
5284                         IEEE80211_CONF_CHANGE_IDLE)) {
5285                 ret = il_power_update_mode(il, false);
5286                 if (ret)
5287                         D_MAC80211("Error setting sleep level\n");
5288         }
5289
5290         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5291                 D_MAC80211("TX Power old=%d new=%d\n",
5292                         il->tx_power_user_lmt, conf->power_level);
5293
5294                 il_set_tx_power(il, conf->power_level, false);
5295         }
5296
5297         if (!il_is_ready(il)) {
5298                 D_MAC80211("leave - not ready\n");
5299                 goto out;
5300         }
5301
5302         if (scan_active)
5303                 goto out;
5304
5305         if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
5306                 il_commit_rxon(il, ctx);
5307         else
5308                 D_INFO("Not re-sending same RXON configuration.\n");
5309         if (ht_changed)
5310                 il_update_qos(il, ctx);
5311
5312 out:
5313         D_MAC80211("leave\n");
5314         mutex_unlock(&il->mutex);
5315         return ret;
5316 }
5317 EXPORT_SYMBOL(il_mac_config);
5318
5319 void il_mac_reset_tsf(struct ieee80211_hw *hw,
5320                               struct ieee80211_vif *vif)
5321 {
5322         struct il_priv *il = hw->priv;
5323         unsigned long flags;
5324         struct il_rxon_context *ctx = &il->ctx;
5325
5326         if (WARN_ON(!il->cfg->ops->legacy))
5327                 return;
5328
5329         mutex_lock(&il->mutex);
5330         D_MAC80211("enter\n");
5331
5332         spin_lock_irqsave(&il->lock, flags);
5333         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5334         spin_unlock_irqrestore(&il->lock, flags);
5335
5336         spin_lock_irqsave(&il->lock, flags);
5337
5338         /* new association get rid of ibss beacon skb */
5339         if (il->beacon_skb)
5340                 dev_kfree_skb(il->beacon_skb);
5341
5342         il->beacon_skb = NULL;
5343
5344         il->timestamp = 0;
5345
5346         spin_unlock_irqrestore(&il->lock, flags);
5347
5348         il_scan_cancel_timeout(il, 100);
5349         if (!il_is_ready_rf(il)) {
5350                 D_MAC80211("leave - not ready\n");
5351                 mutex_unlock(&il->mutex);
5352                 return;
5353         }
5354
5355         /* we are restarting association process
5356          * clear RXON_FILTER_ASSOC_MSK bit
5357          */
5358         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5359         il_commit_rxon(il, ctx);
5360
5361         il_set_rate(il);
5362
5363         mutex_unlock(&il->mutex);
5364
5365         D_MAC80211("leave\n");
5366 }
5367 EXPORT_SYMBOL(il_mac_reset_tsf);
5368
5369 static void il_ht_conf(struct il_priv *il,
5370                         struct ieee80211_vif *vif)
5371 {
5372         struct il_ht_config *ht_conf = &il->current_ht_config;
5373         struct ieee80211_sta *sta;
5374         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5375         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5376
5377         D_ASSOC("enter:\n");
5378
5379         if (!ctx->ht.enabled)
5380                 return;
5381
5382         ctx->ht.protection =
5383                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5384         ctx->ht.non_gf_sta_present =
5385                 !!(bss_conf->ht_operation_mode &
5386                                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5387
5388         ht_conf->single_chain_sufficient = false;
5389
5390         switch (vif->type) {
5391         case NL80211_IFTYPE_STATION:
5392                 rcu_read_lock();
5393                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5394                 if (sta) {
5395                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5396                         int maxstreams;
5397
5398                         maxstreams = (ht_cap->mcs.tx_params &
5399                               IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5400                                 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5401                         maxstreams += 1;
5402
5403                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5404                             ht_cap->mcs.rx_mask[2] == 0)
5405                                 ht_conf->single_chain_sufficient = true;
5406                         if (maxstreams <= 1)
5407                                 ht_conf->single_chain_sufficient = true;
5408                 } else {
5409                         /*
5410                          * If at all, this can only happen through a race
5411                          * when the AP disconnects us while we're still
5412                          * setting up the connection, in that case mac80211
5413                          * will soon tell us about that.
5414                          */
5415                         ht_conf->single_chain_sufficient = true;
5416                 }
5417                 rcu_read_unlock();
5418                 break;
5419         case NL80211_IFTYPE_ADHOC:
5420                 ht_conf->single_chain_sufficient = true;
5421                 break;
5422         default:
5423                 break;
5424         }
5425
5426         D_ASSOC("leave\n");
5427 }
5428
5429 static inline void il_set_no_assoc(struct il_priv *il,
5430                                     struct ieee80211_vif *vif)
5431 {
5432         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5433
5434         /*
5435          * inform the ucode that there is no longer an
5436          * association and that no more packets should be
5437          * sent
5438          */
5439         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5440         ctx->staging.assoc_id = 0;
5441         il_commit_rxon(il, ctx);
5442 }
5443
5444 static void il_beacon_update(struct ieee80211_hw *hw,
5445                                   struct ieee80211_vif *vif)
5446 {
5447         struct il_priv *il = hw->priv;
5448         unsigned long flags;
5449         __le64 timestamp;
5450         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5451
5452         if (!skb)
5453                 return;
5454
5455         D_MAC80211("enter\n");
5456
5457         lockdep_assert_held(&il->mutex);
5458
5459         if (!il->beacon_ctx) {
5460                 IL_ERR("update beacon but no beacon context!\n");
5461                 dev_kfree_skb(skb);
5462                 return;
5463         }
5464
5465         spin_lock_irqsave(&il->lock, flags);
5466
5467         if (il->beacon_skb)
5468                 dev_kfree_skb(il->beacon_skb);
5469
5470         il->beacon_skb = skb;
5471
5472         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5473         il->timestamp = le64_to_cpu(timestamp);
5474
5475         D_MAC80211("leave\n");
5476         spin_unlock_irqrestore(&il->lock, flags);
5477
5478         if (!il_is_ready_rf(il)) {
5479                 D_MAC80211("leave - RF not ready\n");
5480                 return;
5481         }
5482
5483         il->cfg->ops->legacy->post_associate(il);
5484 }
5485
5486 void il_mac_bss_info_changed(struct ieee80211_hw *hw,
5487                                      struct ieee80211_vif *vif,
5488                                      struct ieee80211_bss_conf *bss_conf,
5489                                      u32 changes)
5490 {
5491         struct il_priv *il = hw->priv;
5492         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5493         int ret;
5494
5495         if (WARN_ON(!il->cfg->ops->legacy))
5496                 return;
5497
5498         D_MAC80211("changes = 0x%X\n", changes);
5499
5500         mutex_lock(&il->mutex);
5501
5502         if (!il_is_alive(il)) {
5503                 mutex_unlock(&il->mutex);
5504                 return;
5505         }
5506
5507         if (changes & BSS_CHANGED_QOS) {
5508                 unsigned long flags;
5509
5510                 spin_lock_irqsave(&il->lock, flags);
5511                 ctx->qos_data.qos_active = bss_conf->qos;
5512                 il_update_qos(il, ctx);
5513                 spin_unlock_irqrestore(&il->lock, flags);
5514         }
5515
5516         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5517                 /*
5518                  * the add_interface code must make sure we only ever
5519                  * have a single interface that could be beaconing at
5520                  * any time.
5521                  */
5522                 if (vif->bss_conf.enable_beacon)
5523                         il->beacon_ctx = ctx;
5524                 else
5525                         il->beacon_ctx = NULL;
5526         }
5527
5528         if (changes & BSS_CHANGED_BSSID) {
5529                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5530
5531                 /*
5532                  * If there is currently a HW scan going on in the
5533                  * background then we need to cancel it else the RXON
5534                  * below/in post_associate will fail.
5535                  */
5536                 if (il_scan_cancel_timeout(il, 100)) {
5537                         IL_WARN(
5538                                 "Aborted scan still in progress after 100ms\n");
5539                         D_MAC80211(
5540                                 "leaving - scan abort failed.\n");
5541                         mutex_unlock(&il->mutex);
5542                         return;
5543                 }
5544
5545                 /* mac80211 only sets assoc when in STATION mode */
5546                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
5547                         memcpy(ctx->staging.bssid_addr,
5548                                bss_conf->bssid, ETH_ALEN);
5549
5550                         /* currently needed in a few places */
5551                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5552                 } else {
5553                         ctx->staging.filter_flags &=
5554                                 ~RXON_FILTER_ASSOC_MSK;
5555                 }
5556
5557         }
5558
5559         /*
5560          * This needs to be after setting the BSSID in case
5561          * mac80211 decides to do both changes at once because
5562          * it will invoke post_associate.
5563          */
5564         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5565                 il_beacon_update(hw, vif);
5566
5567         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5568                 D_MAC80211("ERP_PREAMBLE %d\n",
5569                                    bss_conf->use_short_preamble);
5570                 if (bss_conf->use_short_preamble)
5571                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5572                 else
5573                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5574         }
5575
5576         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5577                 D_MAC80211(
5578                         "ERP_CTS %d\n", bss_conf->use_cts_prot);
5579                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5580                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5581                 else
5582                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5583                 if (bss_conf->use_cts_prot)
5584                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
5585                 else
5586                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5587         }
5588
5589         if (changes & BSS_CHANGED_BASIC_RATES) {
5590                 /* XXX use this information
5591                  *
5592                  * To do that, remove code from il_set_rate() and put something
5593                  * like this here:
5594                  *
5595                 if (A-band)
5596                         ctx->staging.ofdm_basic_rates =
5597                                 bss_conf->basic_rates;
5598                 else
5599                         ctx->staging.ofdm_basic_rates =
5600                                 bss_conf->basic_rates >> 4;
5601                         ctx->staging.cck_basic_rates =
5602                                 bss_conf->basic_rates & 0xF;
5603                  */
5604         }
5605
5606         if (changes & BSS_CHANGED_HT) {
5607                 il_ht_conf(il, vif);
5608
5609                 if (il->cfg->ops->hcmd->set_rxon_chain)
5610                         il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
5611         }
5612
5613         if (changes & BSS_CHANGED_ASSOC) {
5614                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5615                 if (bss_conf->assoc) {
5616                         il->timestamp = bss_conf->timestamp;
5617
5618                         if (!il_is_rfkill(il))
5619                                 il->cfg->ops->legacy->post_associate(il);
5620                 } else
5621                         il_set_no_assoc(il, vif);
5622         }
5623
5624         if (changes && il_is_associated_ctx(ctx) && bss_conf->aid) {
5625                 D_MAC80211("Changes (%#x) while associated\n",
5626                                    changes);
5627                 ret = il_send_rxon_assoc(il, ctx);
5628                 if (!ret) {
5629                         /* Sync active_rxon with latest change. */
5630                         memcpy((void *)&ctx->active,
5631                                 &ctx->staging,
5632                                 sizeof(struct il_rxon_cmd));
5633                 }
5634         }
5635
5636         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5637                 if (vif->bss_conf.enable_beacon) {
5638                         memcpy(ctx->staging.bssid_addr,
5639                                bss_conf->bssid, ETH_ALEN);
5640                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5641                         il->cfg->ops->legacy->config_ap(il);
5642                 } else
5643                         il_set_no_assoc(il, vif);
5644         }
5645
5646         if (changes & BSS_CHANGED_IBSS) {
5647                 ret = il->cfg->ops->legacy->manage_ibss_station(il, vif,
5648                                                         bss_conf->ibss_joined);
5649                 if (ret)
5650                         IL_ERR("failed to %s IBSS station %pM\n",
5651                                 bss_conf->ibss_joined ? "add" : "remove",
5652                                 bss_conf->bssid);
5653         }
5654
5655         mutex_unlock(&il->mutex);
5656
5657         D_MAC80211("leave\n");
5658 }
5659 EXPORT_SYMBOL(il_mac_bss_info_changed);
5660
5661 irqreturn_t il_isr(int irq, void *data)
5662 {
5663         struct il_priv *il = data;
5664         u32 inta, inta_mask;
5665         u32 inta_fh;
5666         unsigned long flags;
5667         if (!il)
5668                 return IRQ_NONE;
5669
5670         spin_lock_irqsave(&il->lock, flags);
5671
5672         /* Disable (but don't clear!) interrupts here to avoid
5673          *    back-to-back ISRs and sporadic interrupts from our NIC.
5674          * If we have something to service, the tasklet will re-enable ints.
5675          * If we *don't* have something, we'll re-enable before leaving here. */
5676         inta_mask = _il_rd(il, CSR_INT_MASK);  /* just for debug */
5677         _il_wr(il, CSR_INT_MASK, 0x00000000);
5678
5679         /* Discover which interrupts are active/pending */
5680         inta = _il_rd(il, CSR_INT);
5681         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5682
5683         /* Ignore interrupt if there's nothing in NIC to service.
5684          * This may be due to IRQ shared with another device,
5685          * or due to sporadic interrupts thrown from our NIC. */
5686         if (!inta && !inta_fh) {
5687                 D_ISR(
5688                         "Ignore interrupt, inta == 0, inta_fh == 0\n");
5689                 goto none;
5690         }
5691
5692         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5693                 /* Hardware disappeared. It might have already raised
5694                  * an interrupt */
5695                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5696                 goto unplugged;
5697         }
5698
5699         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5700                       inta, inta_mask, inta_fh);
5701
5702         inta &= ~CSR_INT_BIT_SCD;
5703
5704         /* il_irq_tasklet() will service interrupts and re-enable them */
5705         if (likely(inta || inta_fh))
5706                 tasklet_schedule(&il->irq_tasklet);
5707
5708 unplugged:
5709         spin_unlock_irqrestore(&il->lock, flags);
5710         return IRQ_HANDLED;
5711
5712 none:
5713         /* re-enable interrupts here since we don't have anything to service. */
5714         /* only Re-enable if disabled by irq */
5715         if (test_bit(S_INT_ENABLED, &il->status))
5716                 il_enable_interrupts(il);
5717         spin_unlock_irqrestore(&il->lock, flags);
5718         return IRQ_NONE;
5719 }
5720 EXPORT_SYMBOL(il_isr);
5721
5722 /*
5723  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5724  *  function.
5725  */
5726 void il_tx_cmd_protection(struct il_priv *il,
5727                                struct ieee80211_tx_info *info,
5728                                __le16 fc, __le32 *tx_flags)
5729 {
5730         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
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                 if (!ieee80211_is_mgmt(fc))
5736                         return;
5737
5738                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5739                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5740                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5741                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5742                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5743                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5744                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5745                         break;
5746                 }
5747         } else if (info->control.rates[0].flags &
5748                    IEEE80211_TX_RC_USE_CTS_PROTECT) {
5749                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5750                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5751                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5752         }
5753 }
5754 EXPORT_SYMBOL(il_tx_cmd_protection);