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-debug.h"
  45 #include "common.h"
  46 #include "iwl-power.h"
  47
  48 const char *il_get_cmd_string(u8 cmd)
  49 {
  50         switch (cmd) {
  51                 IL_CMD(N_ALIVE);
  52                 IL_CMD(N_ERROR);
  53                 IL_CMD(C_RXON);
  54                 IL_CMD(C_RXON_ASSOC);
  55                 IL_CMD(C_QOS_PARAM);
  56                 IL_CMD(C_RXON_TIMING);
  57                 IL_CMD(C_ADD_STA);
  58                 IL_CMD(C_REM_STA);
  59                 IL_CMD(C_WEPKEY);
  60                 IL_CMD(N_3945_RX);
  61                 IL_CMD(C_TX);
  62                 IL_CMD(C_RATE_SCALE);
  63                 IL_CMD(C_LEDS);
  64                 IL_CMD(C_TX_LINK_QUALITY_CMD);
  65                 IL_CMD(C_CHANNEL_SWITCH);
  66                 IL_CMD(N_CHANNEL_SWITCH);
  67                 IL_CMD(C_SPECTRUM_MEASUREMENT);
  68                 IL_CMD(N_SPECTRUM_MEASUREMENT);
  69                 IL_CMD(C_POWER_TBL);
  70                 IL_CMD(N_PM_SLEEP);
  71                 IL_CMD(N_PM_DEBUG_STATS);
  72                 IL_CMD(C_SCAN);
  73                 IL_CMD(C_SCAN_ABORT);
  74                 IL_CMD(N_SCAN_START);
  75                 IL_CMD(N_SCAN_RESULTS);
  76                 IL_CMD(N_SCAN_COMPLETE);
  77                 IL_CMD(N_BEACON);
  78                 IL_CMD(C_TX_BEACON);
  79                 IL_CMD(C_TX_PWR_TBL);
  80                 IL_CMD(C_BT_CONFIG);
  81                 IL_CMD(C_STATS);
  82                 IL_CMD(N_STATS);
  83                 IL_CMD(N_CARD_STATE);
  84                 IL_CMD(N_MISSED_BEACONS);
  85                 IL_CMD(C_CT_KILL_CONFIG);
  86                 IL_CMD(C_SENSITIVITY);
  87                 IL_CMD(C_PHY_CALIBRATION);
  88                 IL_CMD(N_RX_PHY);
  89                 IL_CMD(N_RX_MPDU);
  90                 IL_CMD(N_RX);
  91                 IL_CMD(N_COMPRESSED_BA);
  92         default:
  93                 return "UNKNOWN";
  94
  95         }
  96 }
  97 EXPORT_SYMBOL(il_get_cmd_string);
  98
  99 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 100
 101 static void il_generic_cmd_callback(struct il_priv *il,
 102                                      struct il_device_cmd *cmd,
 103                                      struct il_rx_pkt *pkt)
 104 {
 105         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 106                 IL_ERR("Bad return from %s (0x%08X)\n",
 107                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 108                 return;
 109         }
 110
 111 #ifdef CONFIG_IWLEGACY_DEBUG
 112         switch (cmd->hdr.cmd) {
 113         case C_TX_LINK_QUALITY_CMD:
 114         case C_SENSITIVITY:
 115                 D_HC_DUMP("back from %s (0x%08X)\n",
 116                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 117                 break;
 118         default:
 119                 D_HC("back from %s (0x%08X)\n",
 120                 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 121         }
 122 #endif
 123 }
 124
 125 static int
 126 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 127 {
 128         int ret;
 129
 130         BUG_ON(!(cmd->flags & CMD_ASYNC));
 131
 132         /* An asynchronous command can not expect an SKB to be set. */
 133         BUG_ON(cmd->flags & CMD_WANT_SKB);
 134
 135         /* Assign a generic callback if one is not provided */
 136         if (!cmd->callback)
 137                 cmd->callback = il_generic_cmd_callback;
 138
 139         if (test_bit(S_EXIT_PENDING, &il->status))
 140                 return -EBUSY;
 141
 142         ret = il_enqueue_hcmd(il, cmd);
 143         if (ret < 0) {
 144                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 145                           il_get_cmd_string(cmd->id), ret);
 146                 return ret;
 147         }
 148         return 0;
 149 }
 150
 151 int il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 152 {
 153         int cmd_idx;
 154         int ret;
 155
 156         lockdep_assert_held(&il->mutex);
 157
 158         BUG_ON(cmd->flags & CMD_ASYNC);
 159
 160          /* A synchronous command can not have a callback set. */
 161         BUG_ON(cmd->callback);
 162
 163         D_INFO("Attempting to send sync command %s\n",
 164                         il_get_cmd_string(cmd->id));
 165
 166         set_bit(S_HCMD_ACTIVE, &il->status);
 167         D_INFO("Setting HCMD_ACTIVE for command %s\n",
 168                         il_get_cmd_string(cmd->id));
 169
 170         cmd_idx = il_enqueue_hcmd(il, cmd);
 171         if (cmd_idx < 0) {
 172                 ret = cmd_idx;
 173                 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 174                           il_get_cmd_string(cmd->id), ret);
 175                 goto out;
 176         }
 177
 178         ret = wait_event_timeout(il->wait_command_queue,
 179                         !test_bit(S_HCMD_ACTIVE, &il->status),
 180                         HOST_COMPLETE_TIMEOUT);
 181         if (!ret) {
 182                 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 183                         IL_ERR(
 184                                 "Error sending %s: time out after %dms.\n",
 185                                 il_get_cmd_string(cmd->id),
 186                                 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 187
 188                         clear_bit(S_HCMD_ACTIVE, &il->status);
 189                         D_INFO(
 190                                 "Clearing HCMD_ACTIVE for command %s\n",
 191                                        il_get_cmd_string(cmd->id));
 192                         ret = -ETIMEDOUT;
 193                         goto cancel;
 194                 }
 195         }
 196
 197         if (test_bit(S_RF_KILL_HW, &il->status)) {
 198                 IL_ERR("Command %s aborted: RF KILL Switch\n",
 199                                il_get_cmd_string(cmd->id));
 200                 ret = -ECANCELED;
 201                 goto fail;
 202         }
 203         if (test_bit(S_FW_ERROR, &il->status)) {
 204                 IL_ERR("Command %s failed: FW Error\n",
 205                                il_get_cmd_string(cmd->id));
 206                 ret = -EIO;
 207                 goto fail;
 208         }
 209         if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 210                 IL_ERR("Error: Response NULL in '%s'\n",
 211                           il_get_cmd_string(cmd->id));
 212                 ret = -EIO;
 213                 goto cancel;
 214         }
 215
 216         ret = 0;
 217         goto out;
 218
 219 cancel:
 220         if (cmd->flags & CMD_WANT_SKB) {
 221                 /*
 222                  * Cancel the CMD_WANT_SKB flag for the cmd in the
 223                  * TX cmd queue. Otherwise in case the cmd comes
 224                  * in later, it will possibly set an invalid
 225                  * address (cmd->meta.source).
 226                  */
 227                 il->txq[il->cmd_queue].meta[cmd_idx].flags &=
 228                                                         ~CMD_WANT_SKB;
 229         }
 230 fail:
 231         if (cmd->reply_page) {
 232                 il_free_pages(il, cmd->reply_page);
 233                 cmd->reply_page = 0;
 234         }
 235 out:
 236         return ret;
 237 }
 238 EXPORT_SYMBOL(il_send_cmd_sync);
 239
 240 int il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 241 {
 242         if (cmd->flags & CMD_ASYNC)
 243                 return il_send_cmd_async(il, cmd);
 244
 245         return il_send_cmd_sync(il, cmd);
 246 }
 247 EXPORT_SYMBOL(il_send_cmd);
 248
 249 int
 250 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 251 {
 252         struct il_host_cmd cmd = {
 253                 .id = id,
 254                 .len = len,
 255                 .data = data,
 256         };
 257
 258         return il_send_cmd_sync(il, &cmd);
 259 }
 260 EXPORT_SYMBOL(il_send_cmd_pdu);
 261
 262 int il_send_cmd_pdu_async(struct il_priv *il,
 263                            u8 id, u16 len, const void *data,
 264                            void (*callback)(struct il_priv *il,
 265                                             struct il_device_cmd *cmd,
 266                                             struct il_rx_pkt *pkt))
 267 {
 268         struct il_host_cmd cmd = {
 269                 .id = id,
 270                 .len = len,
 271                 .data = data,
 272         };
 273
 274         cmd.flags |= CMD_ASYNC;
 275         cmd.callback = callback;
 276
 277         return il_send_cmd_async(il, &cmd);
 278 }
 279 EXPORT_SYMBOL(il_send_cmd_pdu_async);
 280
 281 /* default: IL_LED_BLINK(0) using blinking idx table */
 282 static int led_mode;
 283 module_param(led_mode, int, S_IRUGO);
 284 MODULE_PARM_DESC(led_mode, "0=system default, "
 285                 "1=On(RF On)/Off(RF Off), 2=blinking");
 286
 287 /* Throughput           OFF time(ms)    ON time (ms)
 288  *      >300                    25              25
 289  *      >200 to 300             40              40
 290  *      >100 to 200             55              55
 291  *      >70 to 100              65              65
 292  *      >50 to 70               75              75
 293  *      >20 to 50               85              85
 294  *      >10 to 20               95              95
 295  *      >5 to 10                110             110
 296  *      >1 to 5                 130             130
 297  *      >0 to 1                 167             167
 298  *      <=0                                     SOLID ON
 299  */
 300 static const struct ieee80211_tpt_blink il_blink[] = {
 301         { .throughput = 0, .blink_time = 334 },
 302         { .throughput = 1 * 1024 - 1, .blink_time = 260 },
 303         { .throughput = 5 * 1024 - 1, .blink_time = 220 },
 304         { .throughput = 10 * 1024 - 1, .blink_time = 190 },
 305         { .throughput = 20 * 1024 - 1, .blink_time = 170 },
 306         { .throughput = 50 * 1024 - 1, .blink_time = 150 },
 307         { .throughput = 70 * 1024 - 1, .blink_time = 130 },
 308         { .throughput = 100 * 1024 - 1, .blink_time = 110 },
 309         { .throughput = 200 * 1024 - 1, .blink_time = 80 },
 310         { .throughput = 300 * 1024 - 1, .blink_time = 50 },
 311 };
 312
 313 /*
 314  * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 315  * Led blink rate analysis showed an average deviation of 0% on 3945,
 316  * 5% on 4965 HW.
 317  * Need to compensate on the led on/off time per HW according to the deviation
 318  * to achieve the desired led frequency
 319  * The calculation is: (100-averageDeviation)/100 * blinkTime
 320  * For code efficiency the calculation will be:
 321  *     compensation = (100 - averageDeviation) * 64 / 100
 322  *     NewBlinkTime = (compensation * BlinkTime) / 64
 323  */
 324 static inline u8 il_blink_compensation(struct il_priv *il,
 325                                     u8 time, u16 compensation)
 326 {
 327         if (!compensation) {
 328                 IL_ERR("undefined blink compensation: "
 329                         "use pre-defined blinking time\n");
 330                 return time;
 331         }
 332
 333         return (u8)((time * compensation) >> 6);
 334 }
 335
 336 /* Set led pattern command */
 337 static int il_led_cmd(struct il_priv *il,
 338                        unsigned long on,
 339                        unsigned long off)
 340 {
 341         struct il_led_cmd led_cmd = {
 342                 .id = IL_LED_LINK,
 343                 .interval = IL_DEF_LED_INTRVL
 344         };
 345         int ret;
 346
 347         if (!test_bit(S_READY, &il->status))
 348                 return -EBUSY;
 349
 350         if (il->blink_on == on && il->blink_off == off)
 351                 return 0;
 352
 353         if (off == 0) {
 354                 /* led is SOLID_ON */
 355                 on = IL_LED_SOLID;
 356         }
 357
 358         D_LED("Led blink time compensation=%u\n",
 359                         il->cfg->base_params->led_compensation);
 360         led_cmd.on = il_blink_compensation(il, on,
 361                                 il->cfg->base_params->led_compensation);
 362         led_cmd.off = il_blink_compensation(il, off,
 363                                 il->cfg->base_params->led_compensation);
 364
 365         ret = il->cfg->ops->led->cmd(il, &led_cmd);
 366         if (!ret) {
 367                 il->blink_on = on;
 368                 il->blink_off = off;
 369         }
 370         return ret;
 371 }
 372
 373 static void il_led_brightness_set(struct led_classdev *led_cdev,
 374                                    enum led_brightness brightness)
 375 {
 376         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 377         unsigned long on = 0;
 378
 379         if (brightness > 0)
 380                 on = IL_LED_SOLID;
 381
 382         il_led_cmd(il, on, 0);
 383 }
 384
 385 static int il_led_blink_set(struct led_classdev *led_cdev,
 386                              unsigned long *delay_on,
 387                              unsigned long *delay_off)
 388 {
 389         struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 390
 391         return il_led_cmd(il, *delay_on, *delay_off);
 392 }
 393
 394 void il_leds_init(struct il_priv *il)
 395 {
 396         int mode = led_mode;
 397         int ret;
 398
 399         if (mode == IL_LED_DEFAULT)
 400                 mode = il->cfg->led_mode;
 401
 402         il->led.name = kasprintf(GFP_KERNEL, "%s-led",
 403                                    wiphy_name(il->hw->wiphy));
 404         il->led.brightness_set = il_led_brightness_set;
 405         il->led.blink_set = il_led_blink_set;
 406         il->led.max_brightness = 1;
 407
 408         switch (mode) {
 409         case IL_LED_DEFAULT:
 410                 WARN_ON(1);
 411                 break;
 412         case IL_LED_BLINK:
 413                 il->led.default_trigger =
 414                         ieee80211_create_tpt_led_trigger(il->hw,
 415                                         IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 416                                         il_blink, ARRAY_SIZE(il_blink));
 417                 break;
 418         case IL_LED_RF_STATE:
 419                 il->led.default_trigger =
 420                         ieee80211_get_radio_led_name(il->hw);
 421                 break;
 422         }
 423
 424         ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 425         if (ret) {
 426                 kfree(il->led.name);
 427                 return;
 428         }
 429
 430         il->led_registered = true;
 431 }
 432 EXPORT_SYMBOL(il_leds_init);
 433
 434 void il_leds_exit(struct il_priv *il)
 435 {
 436         if (!il->led_registered)
 437                 return;
 438
 439         led_classdev_unregister(&il->led);
 440         kfree(il->led.name);
 441 }
 442 EXPORT_SYMBOL(il_leds_exit);
 443
 444 /************************** EEPROM BANDS ****************************
 445  *
 446  * The il_eeprom_band definitions below provide the mapping from the
 447  * EEPROM contents to the specific channel number supported for each
 448  * band.
 449  *
 450  * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 451  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 452  * The specific geography and calibration information for that channel
 453  * is contained in the eeprom map itself.
 454  *
 455  * During init, we copy the eeprom information and channel map
 456  * information into il->channel_info_24/52 and il->channel_map_24/52
 457  *
 458  * channel_map_24/52 provides the idx in the channel_info array for a
 459  * given channel.  We have to have two separate maps as there is channel
 460  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 461  * band_2
 462  *
 463  * A value of 0xff stored in the channel_map indicates that the channel
 464  * is not supported by the hardware at all.
 465  *
 466  * A value of 0xfe in the channel_map indicates that the channel is not
 467  * valid for Tx with the current hardware.  This means that
 468  * while the system can tune and receive on a given channel, it may not
 469  * be able to associate or transmit any frames on that
 470  * channel.  There is no corresponding channel information for that
 471  * entry.
 472  *
 473  *********************************************************************/
 474
 475 /* 2.4 GHz */
 476 const u8 il_eeprom_band_1[14] = {
 477         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 478 };
 479
 480 /* 5.2 GHz bands */
 481 static const u8 il_eeprom_band_2[] = {  /* 4915-5080MHz */
 482         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 483 };
 484
 485 static const u8 il_eeprom_band_3[] = {  /* 5170-5320MHz */
 486         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 487 };
 488
 489 static const u8 il_eeprom_band_4[] = {  /* 5500-5700MHz */
 490         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 491 };
 492
 493 static const u8 il_eeprom_band_5[] = {  /* 5725-5825MHz */
 494         145, 149, 153, 157, 161, 165
 495 };
 496
 497 static const u8 il_eeprom_band_6[] = {       /* 2.4 ht40 channel */
 498         1, 2, 3, 4, 5, 6, 7
 499 };
 500
 501 static const u8 il_eeprom_band_7[] = {       /* 5.2 ht40 channel */
 502         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 503 };
 504
 505 /******************************************************************************
 506  *
 507  * EEPROM related functions
 508  *
 509 ******************************************************************************/
 510
 511 static int il_eeprom_verify_signature(struct il_priv *il)
 512 {
 513         u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 514         int ret = 0;
 515
 516         D_EEPROM("EEPROM signature=0x%08x\n", gp);
 517         switch (gp) {
 518         case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 519         case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 520                 break;
 521         default:
 522                 IL_ERR("bad EEPROM signature,"
 523                         "EEPROM_GP=0x%08x\n", gp);
 524                 ret = -ENOENT;
 525                 break;
 526         }
 527         return ret;
 528 }
 529
 530 const u8
 531 *il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 532 {
 533         BUG_ON(offset >= il->cfg->base_params->eeprom_size);
 534         return &il->eeprom[offset];
 535 }
 536 EXPORT_SYMBOL(il_eeprom_query_addr);
 537
 538 u16 il_eeprom_query16(const struct il_priv *il, size_t offset)
 539 {
 540         if (!il->eeprom)
 541                 return 0;
 542         return (u16)il->eeprom[offset] | ((u16)il->eeprom[offset + 1] << 8);
 543 }
 544 EXPORT_SYMBOL(il_eeprom_query16);
 545
 546 /**
 547  * il_eeprom_init - read EEPROM contents
 548  *
 549  * Load the EEPROM contents from adapter into il->eeprom
 550  *
 551  * NOTE:  This routine uses the non-debug IO access functions.
 552  */
 553 int il_eeprom_init(struct il_priv *il)
 554 {
 555         __le16 *e;
 556         u32 gp = _il_rd(il, CSR_EEPROM_GP);
 557         int sz;
 558         int ret;
 559         u16 addr;
 560
 561         /* allocate eeprom */
 562         sz = il->cfg->base_params->eeprom_size;
 563         D_EEPROM("NVM size = %d\n", sz);
 564         il->eeprom = kzalloc(sz, GFP_KERNEL);
 565         if (!il->eeprom) {
 566                 ret = -ENOMEM;
 567                 goto alloc_err;
 568         }
 569         e = (__le16 *)il->eeprom;
 570
 571         il->cfg->ops->lib->apm_ops.init(il);
 572
 573         ret = il_eeprom_verify_signature(il);
 574         if (ret < 0) {
 575                 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 576                 ret = -ENOENT;
 577                 goto err;
 578         }
 579
 580         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
 581         ret = il->cfg->ops->lib->eeprom_ops.acquire_semaphore(il);
 582         if (ret < 0) {
 583                 IL_ERR("Failed to acquire EEPROM semaphore.\n");
 584                 ret = -ENOENT;
 585                 goto err;
 586         }
 587
 588         /* eeprom is an array of 16bit values */
 589         for (addr = 0; addr < sz; addr += sizeof(u16)) {
 590                 u32 r;
 591
 592                 _il_wr(il, CSR_EEPROM_REG,
 593                              CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 594
 595                 ret = _il_poll_bit(il, CSR_EEPROM_REG,
 596                                           CSR_EEPROM_REG_READ_VALID_MSK,
 597                                           CSR_EEPROM_REG_READ_VALID_MSK,
 598                                           IL_EEPROM_ACCESS_TIMEOUT);
 599                 if (ret < 0) {
 600                         IL_ERR("Time out reading EEPROM[%d]\n",
 601                                                         addr);
 602                         goto done;
 603                 }
 604                 r = _il_rd(il, CSR_EEPROM_REG);
 605                 e[addr / 2] = cpu_to_le16(r >> 16);
 606         }
 607
 608         D_EEPROM("NVM Type: %s, version: 0x%x\n",
 609                        "EEPROM",
 610                        il_eeprom_query16(il, EEPROM_VERSION));
 611
 612         ret = 0;
 613 done:
 614         il->cfg->ops->lib->eeprom_ops.release_semaphore(il);
 615
 616 err:
 617         if (ret)
 618                 il_eeprom_free(il);
 619         /* Reset chip to save power until we load uCode during "up". */
 620         il_apm_stop(il);
 621 alloc_err:
 622         return ret;
 623 }
 624 EXPORT_SYMBOL(il_eeprom_init);
 625
 626 void il_eeprom_free(struct il_priv *il)
 627 {
 628         kfree(il->eeprom);
 629         il->eeprom = NULL;
 630 }
 631 EXPORT_SYMBOL(il_eeprom_free);
 632
 633 static void il_init_band_reference(const struct il_priv *il,
 634                         int eep_band, int *eeprom_ch_count,
 635                         const struct il_eeprom_channel **eeprom_ch_info,
 636                         const u8 **eeprom_ch_idx)
 637 {
 638         u32 offset = il->cfg->ops->lib->
 639                         eeprom_ops.regulatory_bands[eep_band - 1];
 640         switch (eep_band) {
 641         case 1:         /* 2.4GHz band */
 642                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 643                 *eeprom_ch_info = (struct il_eeprom_channel *)
 644                                 il_eeprom_query_addr(il, offset);
 645                 *eeprom_ch_idx = il_eeprom_band_1;
 646                 break;
 647         case 2:         /* 4.9GHz band */
 648                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 649                 *eeprom_ch_info = (struct il_eeprom_channel *)
 650                                 il_eeprom_query_addr(il, offset);
 651                 *eeprom_ch_idx = il_eeprom_band_2;
 652                 break;
 653         case 3:         /* 5.2GHz band */
 654                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 655                 *eeprom_ch_info = (struct il_eeprom_channel *)
 656                                 il_eeprom_query_addr(il, offset);
 657                 *eeprom_ch_idx = il_eeprom_band_3;
 658                 break;
 659         case 4:         /* 5.5GHz band */
 660                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 661                 *eeprom_ch_info = (struct il_eeprom_channel *)
 662                                 il_eeprom_query_addr(il, offset);
 663                 *eeprom_ch_idx = il_eeprom_band_4;
 664                 break;
 665         case 5:         /* 5.7GHz band */
 666                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 667                 *eeprom_ch_info = (struct il_eeprom_channel *)
 668                                 il_eeprom_query_addr(il, offset);
 669                 *eeprom_ch_idx = il_eeprom_band_5;
 670                 break;
 671         case 6:         /* 2.4GHz ht40 channels */
 672                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 673                 *eeprom_ch_info = (struct il_eeprom_channel *)
 674                                 il_eeprom_query_addr(il, offset);
 675                 *eeprom_ch_idx = il_eeprom_band_6;
 676                 break;
 677         case 7:         /* 5 GHz ht40 channels */
 678                 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 679                 *eeprom_ch_info = (struct il_eeprom_channel *)
 680                                 il_eeprom_query_addr(il, offset);
 681                 *eeprom_ch_idx = il_eeprom_band_7;
 682                 break;
 683         default:
 684                 BUG();
 685         }
 686 }
 687
 688 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 689                             ? # x " " : "")
 690 /**
 691  * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 692  *
 693  * Does not set up a command, or touch hardware.
 694  */
 695 static int il_mod_ht40_chan_info(struct il_priv *il,
 696                               enum ieee80211_band band, u16 channel,
 697                               const struct il_eeprom_channel *eeprom_ch,
 698                               u8 clear_ht40_extension_channel)
 699 {
 700         struct il_channel_info *ch_info;
 701
 702         ch_info = (struct il_channel_info *)
 703                         il_get_channel_info(il, band, channel);
 704
 705         if (!il_is_channel_valid(ch_info))
 706                 return -1;
 707
 708         D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 709                         " Ad-Hoc %ssupported\n",
 710                         ch_info->channel,
 711                         il_is_channel_a_band(ch_info) ?
 712                         "5.2" : "2.4",
 713                         CHECK_AND_PRINT(IBSS),
 714                         CHECK_AND_PRINT(ACTIVE),
 715                         CHECK_AND_PRINT(RADAR),
 716                         CHECK_AND_PRINT(WIDE),
 717                         CHECK_AND_PRINT(DFS),
 718                         eeprom_ch->flags,
 719                         eeprom_ch->max_power_avg,
 720                         ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
 721                          && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
 722                         "" : "not ");
 723
 724         ch_info->ht40_eeprom = *eeprom_ch;
 725         ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 726         ch_info->ht40_flags = eeprom_ch->flags;
 727         if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 728                 ch_info->ht40_extension_channel &=
 729                                         ~clear_ht40_extension_channel;
 730
 731         return 0;
 732 }
 733
 734 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 735                             ? # x " " : "")
 736
 737 /**
 738  * il_init_channel_map - Set up driver's info for all possible channels
 739  */
 740 int il_init_channel_map(struct il_priv *il)
 741 {
 742         int eeprom_ch_count = 0;
 743         const u8 *eeprom_ch_idx = NULL;
 744         const struct il_eeprom_channel *eeprom_ch_info = NULL;
 745         int band, ch;
 746         struct il_channel_info *ch_info;
 747
 748         if (il->channel_count) {
 749                 D_EEPROM("Channel map already initialized.\n");
 750                 return 0;
 751         }
 752
 753         D_EEPROM("Initializing regulatory info from EEPROM\n");
 754
 755         il->channel_count =
 756             ARRAY_SIZE(il_eeprom_band_1) +
 757             ARRAY_SIZE(il_eeprom_band_2) +
 758             ARRAY_SIZE(il_eeprom_band_3) +
 759             ARRAY_SIZE(il_eeprom_band_4) +
 760             ARRAY_SIZE(il_eeprom_band_5);
 761
 762         D_EEPROM("Parsing data for %d channels.\n",
 763                         il->channel_count);
 764
 765         il->channel_info = kzalloc(sizeof(struct il_channel_info) *
 766                                      il->channel_count, GFP_KERNEL);
 767         if (!il->channel_info) {
 768                 IL_ERR("Could not allocate channel_info\n");
 769                 il->channel_count = 0;
 770                 return -ENOMEM;
 771         }
 772
 773         ch_info = il->channel_info;
 774
 775         /* Loop through the 5 EEPROM bands adding them in order to the
 776          * channel map we maintain (that contains additional information than
 777          * what just in the EEPROM) */
 778         for (band = 1; band <= 5; band++) {
 779
 780                 il_init_band_reference(il, band, &eeprom_ch_count,
 781                                         &eeprom_ch_info, &eeprom_ch_idx);
 782
 783                 /* Loop through each band adding each of the channels */
 784                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 785                         ch_info->channel = eeprom_ch_idx[ch];
 786                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
 787                             IEEE80211_BAND_5GHZ;
 788
 789                         /* permanently store EEPROM's channel regulatory flags
 790                          *   and max power in channel info database. */
 791                         ch_info->eeprom = eeprom_ch_info[ch];
 792
 793                         /* Copy the run-time flags so they are there even on
 794                          * invalid channels */
 795                         ch_info->flags = eeprom_ch_info[ch].flags;
 796                         /* First write that ht40 is not enabled, and then enable
 797                          * one by one */
 798                         ch_info->ht40_extension_channel =
 799                                         IEEE80211_CHAN_NO_HT40;
 800
 801                         if (!(il_is_channel_valid(ch_info))) {
 802                                 D_EEPROM(
 803                                                "Ch. %d Flags %x [%sGHz] - "
 804                                                "No traffic\n",
 805                                                ch_info->channel,
 806                                                ch_info->flags,
 807                                                il_is_channel_a_band(ch_info) ?
 808                                                "5.2" : "2.4");
 809                                 ch_info++;
 810                                 continue;
 811                         }
 812
 813                         /* Initialize regulatory-based run-time data */
 814                         ch_info->max_power_avg = ch_info->curr_txpow =
 815                             eeprom_ch_info[ch].max_power_avg;
 816                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 817                         ch_info->min_power = 0;
 818
 819                         D_EEPROM("Ch. %d [%sGHz] "
 820                                        "%s%s%s%s%s%s(0x%02x %ddBm):"
 821                                        " Ad-Hoc %ssupported\n",
 822                                        ch_info->channel,
 823                                        il_is_channel_a_band(ch_info) ?
 824                                        "5.2" : "2.4",
 825                                        CHECK_AND_PRINT_I(VALID),
 826                                        CHECK_AND_PRINT_I(IBSS),
 827                                        CHECK_AND_PRINT_I(ACTIVE),
 828                                        CHECK_AND_PRINT_I(RADAR),
 829                                        CHECK_AND_PRINT_I(WIDE),
 830                                        CHECK_AND_PRINT_I(DFS),
 831                                        eeprom_ch_info[ch].flags,
 832                                        eeprom_ch_info[ch].max_power_avg,
 833                                        ((eeprom_ch_info[ch].
 834                                          flags & EEPROM_CHANNEL_IBSS)
 835                                         && !(eeprom_ch_info[ch].
 836                                              flags & EEPROM_CHANNEL_RADAR))
 837                                        ? "" : "not ");
 838
 839                         ch_info++;
 840                 }
 841         }
 842
 843         /* Check if we do have HT40 channels */
 844         if (il->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
 845             EEPROM_REGULATORY_BAND_NO_HT40 &&
 846             il->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
 847             EEPROM_REGULATORY_BAND_NO_HT40)
 848                 return 0;
 849
 850         /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
 851         for (band = 6; band <= 7; band++) {
 852                 enum ieee80211_band ieeeband;
 853
 854                 il_init_band_reference(il, band, &eeprom_ch_count,
 855                                         &eeprom_ch_info, &eeprom_ch_idx);
 856
 857                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 858                 ieeeband =
 859                         (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 860
 861                 /* Loop through each band adding each of the channels */
 862                 for (ch = 0; ch < eeprom_ch_count; ch++) {
 863                         /* Set up driver's info for lower half */
 864                         il_mod_ht40_chan_info(il, ieeeband,
 865                                                 eeprom_ch_idx[ch],
 866                                                 &eeprom_ch_info[ch],
 867                                                 IEEE80211_CHAN_NO_HT40PLUS);
 868
 869                         /* Set up driver's info for upper half */
 870                         il_mod_ht40_chan_info(il, ieeeband,
 871                                                 eeprom_ch_idx[ch] + 4,
 872                                                 &eeprom_ch_info[ch],
 873                                                 IEEE80211_CHAN_NO_HT40MINUS);
 874                 }
 875         }
 876
 877         return 0;
 878 }
 879 EXPORT_SYMBOL(il_init_channel_map);
 880
 881 /*
 882  * il_free_channel_map - undo allocations in il_init_channel_map
 883  */
 884 void il_free_channel_map(struct il_priv *il)
 885 {
 886         kfree(il->channel_info);
 887         il->channel_count = 0;
 888 }
 889 EXPORT_SYMBOL(il_free_channel_map);
 890
 891 /**
 892  * il_get_channel_info - Find driver's ilate channel info
 893  *
 894  * Based on band and channel number.
 895  */
 896 const struct
 897 il_channel_info *il_get_channel_info(const struct il_priv *il,
 898                                         enum ieee80211_band band, u16 channel)
 899 {
 900         int i;
 901
 902         switch (band) {
 903         case IEEE80211_BAND_5GHZ:
 904                 for (i = 14; i < il->channel_count; i++) {
 905                         if (il->channel_info[i].channel == channel)
 906                                 return &il->channel_info[i];
 907                 }
 908                 break;
 909         case IEEE80211_BAND_2GHZ:
 910                 if (channel >= 1 && channel <= 14)
 911                         return &il->channel_info[channel - 1];
 912                 break;
 913         default:
 914                 BUG();
 915         }
 916
 917         return NULL;
 918 }
 919 EXPORT_SYMBOL(il_get_channel_info);
 920
 921 /*
 922  * Setting power level allows the card to go to sleep when not busy.
 923  *
 924  * We calculate a sleep command based on the required latency, which
 925  * we get from mac80211. In order to handle thermal throttling, we can
 926  * also use pre-defined power levels.
 927  */
 928
 929 /*
 930  * This defines the old power levels. They are still used by default
 931  * (level 1) and for thermal throttle (levels 3 through 5)
 932  */
 933
 934 struct il_power_vec_entry {
 935         struct il_powertable_cmd cmd;
 936         u8 no_dtim;     /* number of skip dtim */
 937 };
 938
 939 static void il_power_sleep_cam_cmd(struct il_priv *il,
 940                                     struct il_powertable_cmd *cmd)
 941 {
 942         memset(cmd, 0, sizeof(*cmd));
 943
 944         if (il->power_data.pci_pm)
 945                 cmd->flags |= IL_POWER_PCI_PM_MSK;
 946
 947         D_POWER("Sleep command for CAM\n");
 948 }
 949
 950 static int
 951 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
 952 {
 953         D_POWER("Sending power/sleep command\n");
 954         D_POWER("Flags value = 0x%08X\n", cmd->flags);
 955         D_POWER("Tx timeout = %u\n",
 956                                         le32_to_cpu(cmd->tx_data_timeout));
 957         D_POWER("Rx timeout = %u\n",
 958                                         le32_to_cpu(cmd->rx_data_timeout));
 959         D_POWER(
 960                         "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
 961                         le32_to_cpu(cmd->sleep_interval[0]),
 962                         le32_to_cpu(cmd->sleep_interval[1]),
 963                         le32_to_cpu(cmd->sleep_interval[2]),
 964                         le32_to_cpu(cmd->sleep_interval[3]),
 965                         le32_to_cpu(cmd->sleep_interval[4]));
 966
 967         return il_send_cmd_pdu(il, C_POWER_TBL,
 968                                 sizeof(struct il_powertable_cmd), cmd);
 969 }
 970
 971 int
 972 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd,
 973                        bool force)
 974 {
 975         int ret;
 976         bool update_chains;
 977
 978         lockdep_assert_held(&il->mutex);
 979
 980         /* Don't update the RX chain when chain noise calibration is running */
 981         update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
 982                         il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
 983
 984         if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
 985                 return 0;
 986
 987         if (!il_is_ready_rf(il))
 988                 return -EIO;
 989
 990         /* scan complete use sleep_power_next, need to be updated */
 991         memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
 992         if (test_bit(S_SCANNING, &il->status) && !force) {
 993                 D_INFO("Defer power set mode while scanning\n");
 994                 return 0;
 995         }
 996
 997         if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
 998                 set_bit(S_POWER_PMI, &il->status);
 999
1000         ret = il_set_power(il, cmd);
1001         if (!ret) {
1002                 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1003                         clear_bit(S_POWER_PMI, &il->status);
1004
1005                 if (il->cfg->ops->lib->update_chain_flags && update_chains)
1006                         il->cfg->ops->lib->update_chain_flags(il);
1007                 else if (il->cfg->ops->lib->update_chain_flags)
1008                         D_POWER(
1009                                         "Cannot update the power, chain noise "
1010                                         "calibration running: %d\n",
1011                                         il->chain_noise_data.state);
1012
1013                 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1014         } else
1015                 IL_ERR("set power fail, ret = %d", ret);
1016
1017         return ret;
1018 }
1019
1020 int il_power_update_mode(struct il_priv *il, bool force)
1021 {
1022         struct il_powertable_cmd cmd;
1023
1024         il_power_sleep_cam_cmd(il, &cmd);
1025         return il_power_set_mode(il, &cmd, force);
1026 }
1027 EXPORT_SYMBOL(il_power_update_mode);
1028
1029 /* initialize to default */
1030 void il_power_initialize(struct il_priv *il)
1031 {
1032         u16 lctl = il_pcie_link_ctl(il);
1033
1034         il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
1035
1036         il->power_data.debug_sleep_level_override = -1;
1037
1038         memset(&il->power_data.sleep_cmd, 0,
1039                 sizeof(il->power_data.sleep_cmd));
1040 }
1041 EXPORT_SYMBOL(il_power_initialize);
1042
1043 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1044  * sending probe req.  This should be set long enough to hear probe responses
1045  * from more than one AP.  */
1046 #define IL_ACTIVE_DWELL_TIME_24    (30)       /* all times in msec */
1047 #define IL_ACTIVE_DWELL_TIME_52    (20)
1048
1049 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1050 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1051
1052 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1053  * Must be set longer than active dwell time.
1054  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1055 #define IL_PASSIVE_DWELL_TIME_24   (20)       /* all times in msec */
1056 #define IL_PASSIVE_DWELL_TIME_52   (10)
1057 #define IL_PASSIVE_DWELL_BASE      (100)
1058 #define IL_CHANNEL_TUNE_TIME       5
1059
1060 static int il_send_scan_abort(struct il_priv *il)
1061 {
1062         int ret;
1063         struct il_rx_pkt *pkt;
1064         struct il_host_cmd cmd = {
1065                 .id = C_SCAN_ABORT,
1066                 .flags = CMD_WANT_SKB,
1067         };
1068
1069         /* Exit instantly with error when device is not ready
1070          * to receive scan abort command or it does not perform
1071          * hardware scan currently */
1072         if (!test_bit(S_READY, &il->status) ||
1073             !test_bit(S_GEO_CONFIGURED, &il->status) ||
1074             !test_bit(S_SCAN_HW, &il->status) ||
1075             test_bit(S_FW_ERROR, &il->status) ||
1076             test_bit(S_EXIT_PENDING, &il->status))
1077                 return -EIO;
1078
1079         ret = il_send_cmd_sync(il, &cmd);
1080         if (ret)
1081                 return ret;
1082
1083         pkt = (struct il_rx_pkt *)cmd.reply_page;
1084         if (pkt->u.status != CAN_ABORT_STATUS) {
1085                 /* The scan abort will return 1 for success or
1086                  * 2 for "failure".  A failure condition can be
1087                  * due to simply not being in an active scan which
1088                  * can occur if we send the scan abort before we
1089                  * the microcode has notified us that a scan is
1090                  * completed. */
1091                 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1092                 ret = -EIO;
1093         }
1094
1095         il_free_pages(il, cmd.reply_page);
1096         return ret;
1097 }
1098
1099 static void il_complete_scan(struct il_priv *il, bool aborted)
1100 {
1101         /* check if scan was requested from mac80211 */
1102         if (il->scan_request) {
1103                 D_SCAN("Complete scan in mac80211\n");
1104                 ieee80211_scan_completed(il->hw, aborted);
1105         }
1106
1107         il->scan_vif = NULL;
1108         il->scan_request = NULL;
1109 }
1110
1111 void il_force_scan_end(struct il_priv *il)
1112 {
1113         lockdep_assert_held(&il->mutex);
1114
1115         if (!test_bit(S_SCANNING, &il->status)) {
1116                 D_SCAN("Forcing scan end while not scanning\n");
1117                 return;
1118         }
1119
1120         D_SCAN("Forcing scan end\n");
1121         clear_bit(S_SCANNING, &il->status);
1122         clear_bit(S_SCAN_HW, &il->status);
1123         clear_bit(S_SCAN_ABORTING, &il->status);
1124         il_complete_scan(il, true);
1125 }
1126
1127 static void il_do_scan_abort(struct il_priv *il)
1128 {
1129         int ret;
1130
1131         lockdep_assert_held(&il->mutex);
1132
1133         if (!test_bit(S_SCANNING, &il->status)) {
1134                 D_SCAN("Not performing scan to abort\n");
1135                 return;
1136         }
1137
1138         if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1139                 D_SCAN("Scan abort in progress\n");
1140                 return;
1141         }
1142
1143         ret = il_send_scan_abort(il);
1144         if (ret) {
1145                 D_SCAN("Send scan abort failed %d\n", ret);
1146                 il_force_scan_end(il);
1147         } else
1148                 D_SCAN("Successfully send scan abort\n");
1149 }
1150
1151 /**
1152  * il_scan_cancel - Cancel any currently executing HW scan
1153  */
1154 int il_scan_cancel(struct il_priv *il)
1155 {
1156         D_SCAN("Queuing abort scan\n");
1157         queue_work(il->workqueue, &il->abort_scan);
1158         return 0;
1159 }
1160 EXPORT_SYMBOL(il_scan_cancel);
1161
1162 /**
1163  * il_scan_cancel_timeout - Cancel any currently executing HW scan
1164  * @ms: amount of time to wait (in milliseconds) for scan to abort
1165  *
1166  */
1167 int il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1168 {
1169         unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1170
1171         lockdep_assert_held(&il->mutex);
1172
1173         D_SCAN("Scan cancel timeout\n");
1174
1175         il_do_scan_abort(il);
1176
1177         while (time_before_eq(jiffies, timeout)) {
1178                 if (!test_bit(S_SCAN_HW, &il->status))
1179                         break;
1180                 msleep(20);
1181         }
1182
1183         return test_bit(S_SCAN_HW, &il->status);
1184 }
1185 EXPORT_SYMBOL(il_scan_cancel_timeout);
1186
1187 /* Service response to C_SCAN (0x80) */
1188 static void il_hdl_scan(struct il_priv *il,
1189                               struct il_rx_buf *rxb)
1190 {
1191 #ifdef CONFIG_IWLEGACY_DEBUG
1192         struct il_rx_pkt *pkt = rxb_addr(rxb);
1193         struct il_scanreq_notification *notif =
1194             (struct il_scanreq_notification *)pkt->u.raw;
1195
1196         D_SCAN("Scan request status = 0x%x\n", notif->status);
1197 #endif
1198 }
1199
1200 /* Service N_SCAN_START (0x82) */
1201 static void il_hdl_scan_start(struct il_priv *il,
1202                                     struct il_rx_buf *rxb)
1203 {
1204         struct il_rx_pkt *pkt = rxb_addr(rxb);
1205         struct il_scanstart_notification *notif =
1206             (struct il_scanstart_notification *)pkt->u.raw;
1207         il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1208         D_SCAN("Scan start: "
1209                        "%d [802.11%s] "
1210                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
1211                        notif->channel,
1212                        notif->band ? "bg" : "a",
1213                        le32_to_cpu(notif->tsf_high),
1214                        le32_to_cpu(notif->tsf_low),
1215                        notif->status, notif->beacon_timer);
1216 }
1217
1218 /* Service N_SCAN_RESULTS (0x83) */
1219 static void il_hdl_scan_results(struct il_priv *il,
1220                                       struct il_rx_buf *rxb)
1221 {
1222 #ifdef CONFIG_IWLEGACY_DEBUG
1223         struct il_rx_pkt *pkt = rxb_addr(rxb);
1224         struct il_scanresults_notification *notif =
1225             (struct il_scanresults_notification *)pkt->u.raw;
1226
1227         D_SCAN("Scan ch.res: "
1228                        "%d [802.11%s] "
1229                        "(TSF: 0x%08X:%08X) - %d "
1230                        "elapsed=%lu usec\n",
1231                        notif->channel,
1232                        notif->band ? "bg" : "a",
1233                        le32_to_cpu(notif->tsf_high),
1234                        le32_to_cpu(notif->tsf_low),
1235                        le32_to_cpu(notif->stats[0]),
1236                        le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1237 #endif
1238 }
1239
1240 /* Service N_SCAN_COMPLETE (0x84) */
1241 static void il_hdl_scan_complete(struct il_priv *il,
1242                                        struct il_rx_buf *rxb)
1243 {
1244
1245 #ifdef CONFIG_IWLEGACY_DEBUG
1246         struct il_rx_pkt *pkt = rxb_addr(rxb);
1247         struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1248 #endif
1249
1250         D_SCAN(
1251                         "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1252                        scan_notif->scanned_channels,
1253                        scan_notif->tsf_low,
1254                        scan_notif->tsf_high, scan_notif->status);
1255
1256         /* The HW is no longer scanning */
1257         clear_bit(S_SCAN_HW, &il->status);
1258
1259         D_SCAN("Scan on %sGHz took %dms\n",
1260                        (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1261                        jiffies_to_msecs(jiffies - il->scan_start));
1262
1263         queue_work(il->workqueue, &il->scan_completed);
1264 }
1265
1266 void il_setup_rx_scan_handlers(struct il_priv *il)
1267 {
1268         /* scan handlers */
1269         il->handlers[C_SCAN] = il_hdl_scan;
1270         il->handlers[N_SCAN_START] =
1271                                         il_hdl_scan_start;
1272         il->handlers[N_SCAN_RESULTS] =
1273                                         il_hdl_scan_results;
1274         il->handlers[N_SCAN_COMPLETE] =
1275                                         il_hdl_scan_complete;
1276 }
1277 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1278
1279 inline u16 il_get_active_dwell_time(struct il_priv *il,
1280                                      enum ieee80211_band band,
1281                                      u8 n_probes)
1282 {
1283         if (band == IEEE80211_BAND_5GHZ)
1284                 return IL_ACTIVE_DWELL_TIME_52 +
1285                         IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1286         else
1287                 return IL_ACTIVE_DWELL_TIME_24 +
1288                         IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1289 }
1290 EXPORT_SYMBOL(il_get_active_dwell_time);
1291
1292 u16 il_get_passive_dwell_time(struct il_priv *il,
1293                                enum ieee80211_band band,
1294                                struct ieee80211_vif *vif)
1295 {
1296         struct il_rxon_context *ctx = &il->ctx;
1297         u16 value;
1298
1299         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
1300             IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_24 :
1301             IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_52;
1302
1303         if (il_is_any_associated(il)) {
1304                 /*
1305                  * If we're associated, we clamp the maximum passive
1306                  * dwell time to be 98% of the smallest beacon interval
1307                  * (minus 2 * channel tune time)
1308                  */
1309                 value = ctx->vif ? ctx->vif->bss_conf.beacon_int : 0;
1310                 if (value > IL_PASSIVE_DWELL_BASE || !value)
1311                         value = IL_PASSIVE_DWELL_BASE;
1312                 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1313                 passive = min(value, passive);
1314         }
1315
1316         return passive;
1317 }
1318 EXPORT_SYMBOL(il_get_passive_dwell_time);
1319
1320 void il_init_scan_params(struct il_priv *il)
1321 {
1322         u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1323         if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1324                 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1325         if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1326                 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1327 }
1328 EXPORT_SYMBOL(il_init_scan_params);
1329
1330 static int il_scan_initiate(struct il_priv *il,
1331                                     struct ieee80211_vif *vif)
1332 {
1333         int ret;
1334
1335         lockdep_assert_held(&il->mutex);
1336
1337         if (WARN_ON(!il->cfg->ops->utils->request_scan))
1338                 return -EOPNOTSUPP;
1339
1340         cancel_delayed_work(&il->scan_check);
1341
1342         if (!il_is_ready_rf(il)) {
1343                 IL_WARN("Request scan called when driver not ready.\n");
1344                 return -EIO;
1345         }
1346
1347         if (test_bit(S_SCAN_HW, &il->status)) {
1348                 D_SCAN(
1349                         "Multiple concurrent scan requests in parallel.\n");
1350                 return -EBUSY;
1351         }
1352
1353         if (test_bit(S_SCAN_ABORTING, &il->status)) {
1354                 D_SCAN("Scan request while abort pending.\n");
1355                 return -EBUSY;
1356         }
1357
1358         D_SCAN("Starting scan...\n");
1359
1360         set_bit(S_SCANNING, &il->status);
1361         il->scan_start = jiffies;
1362
1363         ret = il->cfg->ops->utils->request_scan(il, vif);
1364         if (ret) {
1365                 clear_bit(S_SCANNING, &il->status);
1366                 return ret;
1367         }
1368
1369         queue_delayed_work(il->workqueue, &il->scan_check,
1370                            IL_SCAN_CHECK_WATCHDOG);
1371
1372         return 0;
1373 }
1374
1375 int il_mac_hw_scan(struct ieee80211_hw *hw,
1376                     struct ieee80211_vif *vif,
1377                     struct cfg80211_scan_request *req)
1378 {
1379         struct il_priv *il = hw->priv;
1380         int ret;
1381
1382         D_MAC80211("enter\n");
1383
1384         if (req->n_channels == 0)
1385                 return -EINVAL;
1386
1387         mutex_lock(&il->mutex);
1388
1389         if (test_bit(S_SCANNING, &il->status)) {
1390                 D_SCAN("Scan already in progress.\n");
1391                 ret = -EAGAIN;
1392                 goto out_unlock;
1393         }
1394
1395         /* mac80211 will only ask for one band at a time */
1396         il->scan_request = req;
1397         il->scan_vif = vif;
1398         il->scan_band = req->channels[0]->band;
1399
1400         ret = il_scan_initiate(il, vif);
1401
1402         D_MAC80211("leave\n");
1403
1404 out_unlock:
1405         mutex_unlock(&il->mutex);
1406
1407         return ret;
1408 }
1409 EXPORT_SYMBOL(il_mac_hw_scan);
1410
1411 static void il_bg_scan_check(struct work_struct *data)
1412 {
1413         struct il_priv *il =
1414             container_of(data, struct il_priv, scan_check.work);
1415
1416         D_SCAN("Scan check work\n");
1417
1418         /* Since we are here firmware does not finish scan and
1419          * most likely is in bad shape, so we don't bother to
1420          * send abort command, just force scan complete to mac80211 */
1421         mutex_lock(&il->mutex);
1422         il_force_scan_end(il);
1423         mutex_unlock(&il->mutex);
1424 }
1425
1426 /**
1427  * il_fill_probe_req - fill in all required fields and IE for probe request
1428  */
1429
1430 u16
1431 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1432                        const u8 *ta, const u8 *ies, int ie_len, int left)
1433 {
1434         int len = 0;
1435         u8 *pos = NULL;
1436
1437         /* Make sure there is enough space for the probe request,
1438          * two mandatory IEs and the data */
1439         left -= 24;
1440         if (left < 0)
1441                 return 0;
1442
1443         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1444         memcpy(frame->da, il_bcast_addr, ETH_ALEN);
1445         memcpy(frame->sa, ta, ETH_ALEN);
1446         memcpy(frame->bssid, il_bcast_addr, ETH_ALEN);
1447         frame->seq_ctrl = 0;
1448
1449         len += 24;
1450
1451         /* ...next IE... */
1452         pos = &frame->u.probe_req.variable[0];
1453
1454         /* fill in our indirect SSID IE */
1455         left -= 2;
1456         if (left < 0)
1457                 return 0;
1458         *pos++ = WLAN_EID_SSID;
1459         *pos++ = 0;
1460
1461         len += 2;
1462
1463         if (WARN_ON(left < ie_len))
1464                 return len;
1465
1466         if (ies && ie_len) {
1467                 memcpy(pos, ies, ie_len);
1468                 len += ie_len;
1469         }
1470
1471         return (u16)len;
1472 }
1473 EXPORT_SYMBOL(il_fill_probe_req);
1474
1475 static void il_bg_abort_scan(struct work_struct *work)
1476 {
1477         struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1478
1479         D_SCAN("Abort scan work\n");
1480
1481         /* We keep scan_check work queued in case when firmware will not
1482          * report back scan completed notification */
1483         mutex_lock(&il->mutex);
1484         il_scan_cancel_timeout(il, 200);
1485         mutex_unlock(&il->mutex);
1486 }
1487
1488 static void il_bg_scan_completed(struct work_struct *work)
1489 {
1490         struct il_priv *il =
1491             container_of(work, struct il_priv, scan_completed);
1492         bool aborted;
1493
1494         D_SCAN("Completed scan.\n");
1495
1496         cancel_delayed_work(&il->scan_check);
1497
1498         mutex_lock(&il->mutex);
1499
1500         aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1501         if (aborted)
1502                 D_SCAN("Aborted scan completed.\n");
1503
1504         if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1505                 D_SCAN("Scan already completed.\n");
1506                 goto out_settings;
1507         }
1508
1509         il_complete_scan(il, aborted);
1510
1511 out_settings:
1512         /* Can we still talk to firmware ? */
1513         if (!il_is_ready_rf(il))
1514                 goto out;
1515
1516         /*
1517          * We do not commit power settings while scan is pending,
1518          * do it now if the settings changed.
1519          */
1520         il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1521         il_set_tx_power(il, il->tx_power_next, false);
1522
1523         il->cfg->ops->utils->post_scan(il);
1524
1525 out:
1526         mutex_unlock(&il->mutex);
1527 }
1528
1529 void il_setup_scan_deferred_work(struct il_priv *il)
1530 {
1531         INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1532         INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1533         INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1534 }
1535 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1536
1537 void il_cancel_scan_deferred_work(struct il_priv *il)
1538 {
1539         cancel_work_sync(&il->abort_scan);
1540         cancel_work_sync(&il->scan_completed);
1541
1542         if (cancel_delayed_work_sync(&il->scan_check)) {
1543                 mutex_lock(&il->mutex);
1544                 il_force_scan_end(il);
1545                 mutex_unlock(&il->mutex);
1546         }
1547 }
1548 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1549
1550 /* il->sta_lock must be held */
1551 static void il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1552 {
1553
1554         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1555                 IL_ERR(
1556                         "ACTIVATE a non DRIVER active station id %u addr %pM\n",
1557                         sta_id, il->stations[sta_id].sta.sta.addr);
1558
1559         if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1560                 D_ASSOC(
1561                         "STA id %u addr %pM already present"
1562                         " in uCode (according to driver)\n",
1563                         sta_id, il->stations[sta_id].sta.sta.addr);
1564         } else {
1565                 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1566                 D_ASSOC("Added STA id %u addr %pM to uCode\n",
1567                                 sta_id, il->stations[sta_id].sta.sta.addr);
1568         }
1569 }
1570
1571 static int il_process_add_sta_resp(struct il_priv *il,
1572                                     struct il_addsta_cmd *addsta,
1573                                     struct il_rx_pkt *pkt,
1574                                     bool sync)
1575 {
1576         u8 sta_id = addsta->sta.sta_id;
1577         unsigned long flags;
1578         int ret = -EIO;
1579
1580         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1581                 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n",
1582                         pkt->hdr.flags);
1583                 return ret;
1584         }
1585
1586         D_INFO("Processing response for adding station %u\n",
1587                        sta_id);
1588
1589         spin_lock_irqsave(&il->sta_lock, flags);
1590
1591         switch (pkt->u.add_sta.status) {
1592         case ADD_STA_SUCCESS_MSK:
1593                 D_INFO("C_ADD_STA PASSED\n");
1594                 il_sta_ucode_activate(il, sta_id);
1595                 ret = 0;
1596                 break;
1597         case ADD_STA_NO_ROOM_IN_TBL:
1598                 IL_ERR("Adding station %d failed, no room in table.\n",
1599                         sta_id);
1600                 break;
1601         case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1602                 IL_ERR(
1603                         "Adding station %d failed, no block ack resource.\n",
1604                         sta_id);
1605                 break;
1606         case ADD_STA_MODIFY_NON_EXIST_STA:
1607                 IL_ERR("Attempting to modify non-existing station %d\n",
1608                         sta_id);
1609                 break;
1610         default:
1611                 D_ASSOC("Received C_ADD_STA:(0x%08X)\n",
1612                                 pkt->u.add_sta.status);
1613                 break;
1614         }
1615
1616         D_INFO("%s station id %u addr %pM\n",
1617                        il->stations[sta_id].sta.mode ==
1618                        STA_CONTROL_MODIFY_MSK ?  "Modified" : "Added",
1619                        sta_id, il->stations[sta_id].sta.sta.addr);
1620
1621         /*
1622          * XXX: The MAC address in the command buffer is often changed from
1623          * the original sent to the device. That is, the MAC address
1624          * written to the command buffer often is not the same MAC address
1625          * read from the command buffer when the command returns. This
1626          * issue has not yet been resolved and this debugging is left to
1627          * observe the problem.
1628          */
1629         D_INFO("%s station according to cmd buffer %pM\n",
1630                        il->stations[sta_id].sta.mode ==
1631                        STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
1632                        addsta->sta.addr);
1633         spin_unlock_irqrestore(&il->sta_lock, flags);
1634
1635         return ret;
1636 }
1637
1638 static void il_add_sta_callback(struct il_priv *il,
1639                                  struct il_device_cmd *cmd,
1640                                  struct il_rx_pkt *pkt)
1641 {
1642         struct il_addsta_cmd *addsta =
1643                 (struct il_addsta_cmd *)cmd->cmd.payload;
1644
1645         il_process_add_sta_resp(il, addsta, pkt, false);
1646
1647 }
1648
1649 int il_send_add_sta(struct il_priv *il,
1650                      struct il_addsta_cmd *sta, u8 flags)
1651 {
1652         struct il_rx_pkt *pkt = NULL;
1653         int ret = 0;
1654         u8 data[sizeof(*sta)];
1655         struct il_host_cmd cmd = {
1656                 .id = C_ADD_STA,
1657                 .flags = flags,
1658                 .data = data,
1659         };
1660         u8 sta_id __maybe_unused = sta->sta.sta_id;
1661
1662         D_INFO("Adding sta %u (%pM) %ssynchronously\n",
1663                        sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
1664
1665         if (flags & CMD_ASYNC)
1666                 cmd.callback = il_add_sta_callback;
1667         else {
1668                 cmd.flags |= CMD_WANT_SKB;
1669                 might_sleep();
1670         }
1671
1672         cmd.len = il->cfg->ops->utils->build_addsta_hcmd(sta, data);
1673         ret = il_send_cmd(il, &cmd);
1674
1675         if (ret || (flags & CMD_ASYNC))
1676                 return ret;
1677
1678         if (ret == 0) {
1679                 pkt = (struct il_rx_pkt *)cmd.reply_page;
1680                 ret = il_process_add_sta_resp(il, sta, pkt, true);
1681         }
1682         il_free_pages(il, cmd.reply_page);
1683
1684         return ret;
1685 }
1686 EXPORT_SYMBOL(il_send_add_sta);
1687
1688 static void il_set_ht_add_station(struct il_priv *il, u8 idx,
1689                                    struct ieee80211_sta *sta,
1690                                    struct il_rxon_context *ctx)
1691 {
1692         struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1693         __le32 sta_flags;
1694         u8 mimo_ps_mode;
1695
1696         if (!sta || !sta_ht_inf->ht_supported)
1697                 goto done;
1698
1699         mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
1700         D_ASSOC("spatial multiplexing power save mode: %s\n",
1701                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
1702                         "static" :
1703                         (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
1704                         "dynamic" : "disabled");
1705
1706         sta_flags = il->stations[idx].sta.station_flags;
1707
1708         sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1709
1710         switch (mimo_ps_mode) {
1711         case WLAN_HT_CAP_SM_PS_STATIC:
1712                 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1713                 break;
1714         case WLAN_HT_CAP_SM_PS_DYNAMIC:
1715                 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1716                 break;
1717         case WLAN_HT_CAP_SM_PS_DISABLED:
1718                 break;
1719         default:
1720                 IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode);
1721                 break;
1722         }
1723
1724         sta_flags |= cpu_to_le32(
1725               (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1726
1727         sta_flags |= cpu_to_le32(
1728               (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1729
1730         if (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap))
1731                 sta_flags |= STA_FLG_HT40_EN_MSK;
1732         else
1733                 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1734
1735         il->stations[idx].sta.station_flags = sta_flags;
1736  done:
1737         return;
1738 }
1739
1740 /**
1741  * il_prep_station - Prepare station information for addition
1742  *
1743  * should be called with sta_lock held
1744  */
1745 u8 il_prep_station(struct il_priv *il, struct il_rxon_context *ctx,
1746                     const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
1747 {
1748         struct il_station_entry *station;
1749         int i;
1750         u8 sta_id = IL_INVALID_STATION;
1751         u16 rate;
1752
1753         if (is_ap)
1754                 sta_id = ctx->ap_sta_id;
1755         else if (is_broadcast_ether_addr(addr))
1756                 sta_id = ctx->bcast_sta_id;
1757         else
1758                 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1759                         if (!compare_ether_addr(il->stations[i].sta.sta.addr,
1760                                                 addr)) {
1761                                 sta_id = i;
1762                                 break;
1763                         }
1764
1765                         if (!il->stations[i].used &&
1766                             sta_id == IL_INVALID_STATION)
1767                                 sta_id = i;
1768                 }
1769
1770         /*
1771          * These two conditions have the same outcome, but keep them
1772          * separate
1773          */
1774         if (unlikely(sta_id == IL_INVALID_STATION))
1775                 return sta_id;
1776
1777         /*
1778          * uCode is not able to deal with multiple requests to add a
1779          * station. Keep track if one is in progress so that we do not send
1780          * another.
1781          */
1782         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1783                 D_INFO(
1784                                 "STA %d already in process of being added.\n",
1785                                 sta_id);
1786                 return sta_id;
1787         }
1788
1789         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1790             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1791             !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) {
1792                 D_ASSOC(
1793                                 "STA %d (%pM) already added, not adding again.\n",
1794                                 sta_id, addr);
1795                 return sta_id;
1796         }
1797
1798         station = &il->stations[sta_id];
1799         station->used = IL_STA_DRIVER_ACTIVE;
1800         D_ASSOC("Add STA to driver ID %d: %pM\n",
1801                         sta_id, addr);
1802         il->num_stations++;
1803
1804         /* Set up the C_ADD_STA command to send to device */
1805         memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1806         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1807         station->sta.mode = 0;
1808         station->sta.sta.sta_id = sta_id;
1809         station->sta.station_flags = ctx->station_flags;
1810         station->ctxid = ctx->ctxid;
1811
1812         if (sta) {
1813                 struct il_station_priv_common *sta_priv;
1814
1815                 sta_priv = (void *)sta->drv_priv;
1816                 sta_priv->ctx = ctx;
1817         }
1818
1819         /*
1820          * OK to call unconditionally, since local stations (IBSS BSSID
1821          * STA and broadcast STA) pass in a NULL sta, and mac80211
1822          * doesn't allow HT IBSS.
1823          */
1824         il_set_ht_add_station(il, sta_id, sta, ctx);
1825
1826         /* 3945 only */
1827         rate = (il->band == IEEE80211_BAND_5GHZ) ?
1828                 RATE_6M_PLCP : RATE_1M_PLCP;
1829         /* Turn on both antennas for the station... */
1830         station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1831
1832         return sta_id;
1833
1834 }
1835 EXPORT_SYMBOL_GPL(il_prep_station);
1836
1837 #define STA_WAIT_TIMEOUT (HZ/2)
1838
1839 /**
1840  * il_add_station_common -
1841  */
1842 int
1843 il_add_station_common(struct il_priv *il,
1844                         struct il_rxon_context *ctx,
1845                            const u8 *addr, bool is_ap,
1846                            struct ieee80211_sta *sta, u8 *sta_id_r)
1847 {
1848         unsigned long flags_spin;
1849         int ret = 0;
1850         u8 sta_id;
1851         struct il_addsta_cmd sta_cmd;
1852
1853         *sta_id_r = 0;
1854         spin_lock_irqsave(&il->sta_lock, flags_spin);
1855         sta_id = il_prep_station(il, ctx, addr, is_ap, sta);
1856         if (sta_id == IL_INVALID_STATION) {
1857                 IL_ERR("Unable to prepare station %pM for addition\n",
1858                         addr);
1859                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1860                 return -EINVAL;
1861         }
1862
1863         /*
1864          * uCode is not able to deal with multiple requests to add a
1865          * station. Keep track if one is in progress so that we do not send
1866          * another.
1867          */
1868         if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1869                 D_INFO(
1870                         "STA %d already in process of being added.\n",
1871                        sta_id);
1872                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1873                 return -EEXIST;
1874         }
1875
1876         if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1877             (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
1878                 D_ASSOC(
1879                         "STA %d (%pM) already added, not adding again.\n",
1880                         sta_id, addr);
1881                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1882                 return -EEXIST;
1883         }
1884
1885         il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
1886         memcpy(&sta_cmd, &il->stations[sta_id].sta,
1887                                 sizeof(struct il_addsta_cmd));
1888         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1889
1890         /* Add station to device's station table */
1891         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
1892         if (ret) {
1893                 spin_lock_irqsave(&il->sta_lock, flags_spin);
1894                 IL_ERR("Adding station %pM failed.\n",
1895                         il->stations[sta_id].sta.sta.addr);
1896                 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
1897                 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
1898                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1899         }
1900         *sta_id_r = sta_id;
1901         return ret;
1902 }
1903 EXPORT_SYMBOL(il_add_station_common);
1904
1905 /**
1906  * il_sta_ucode_deactivate - deactivate ucode status for a station
1907  *
1908  * il->sta_lock must be held
1909  */
1910 static void il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
1911 {
1912         /* Ucode must be active and driver must be non active */
1913         if ((il->stations[sta_id].used &
1914              (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
1915                                                 IL_STA_UCODE_ACTIVE)
1916                 IL_ERR("removed non active STA %u\n", sta_id);
1917
1918         il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
1919
1920         memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
1921         D_ASSOC("Removed STA %u\n", sta_id);
1922 }
1923
1924 static int il_send_remove_station(struct il_priv *il,
1925                                    const u8 *addr, int sta_id,
1926                                    bool temporary)
1927 {
1928         struct il_rx_pkt *pkt;
1929         int ret;
1930
1931         unsigned long flags_spin;
1932         struct il_rem_sta_cmd rm_sta_cmd;
1933
1934         struct il_host_cmd cmd = {
1935                 .id = C_REM_STA,
1936                 .len = sizeof(struct il_rem_sta_cmd),
1937                 .flags = CMD_SYNC,
1938                 .data = &rm_sta_cmd,
1939         };
1940
1941         memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
1942         rm_sta_cmd.num_sta = 1;
1943         memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
1944
1945         cmd.flags |= CMD_WANT_SKB;
1946
1947         ret = il_send_cmd(il, &cmd);
1948
1949         if (ret)
1950                 return ret;
1951
1952         pkt = (struct il_rx_pkt *)cmd.reply_page;
1953         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1954                 IL_ERR("Bad return from C_REM_STA (0x%08X)\n",
1955                           pkt->hdr.flags);
1956                 ret = -EIO;
1957         }
1958
1959         if (!ret) {
1960                 switch (pkt->u.rem_sta.status) {
1961                 case REM_STA_SUCCESS_MSK:
1962                         if (!temporary) {
1963                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
1964                                 il_sta_ucode_deactivate(il, sta_id);
1965                                 spin_unlock_irqrestore(&il->sta_lock,
1966                                                                 flags_spin);
1967                         }
1968                         D_ASSOC("C_REM_STA PASSED\n");
1969                         break;
1970                 default:
1971                         ret = -EIO;
1972                         IL_ERR("C_REM_STA failed\n");
1973                         break;
1974                 }
1975         }
1976         il_free_pages(il, cmd.reply_page);
1977
1978         return ret;
1979 }
1980
1981 /**
1982  * il_remove_station - Remove driver's knowledge of station.
1983  */
1984 int il_remove_station(struct il_priv *il, const u8 sta_id,
1985                        const u8 *addr)
1986 {
1987         unsigned long flags;
1988
1989         if (!il_is_ready(il)) {
1990                 D_INFO(
1991                         "Unable to remove station %pM, device not ready.\n",
1992                         addr);
1993                 /*
1994                  * It is typical for stations to be removed when we are
1995                  * going down. Return success since device will be down
1996                  * soon anyway
1997                  */
1998                 return 0;
1999         }
2000
2001         D_ASSOC("Removing STA from driver:%d  %pM\n",
2002                         sta_id, addr);
2003
2004         if (WARN_ON(sta_id == IL_INVALID_STATION))
2005                 return -EINVAL;
2006
2007         spin_lock_irqsave(&il->sta_lock, flags);
2008
2009         if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2010                 D_INFO("Removing %pM but non DRIVER active\n",
2011                                 addr);
2012                 goto out_err;
2013         }
2014
2015         if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2016                 D_INFO("Removing %pM but non UCODE active\n",
2017                                 addr);
2018                 goto out_err;
2019         }
2020
2021         if (il->stations[sta_id].used & IL_STA_LOCAL) {
2022                 kfree(il->stations[sta_id].lq);
2023                 il->stations[sta_id].lq = NULL;
2024         }
2025
2026         il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2027
2028         il->num_stations--;
2029
2030         BUG_ON(il->num_stations < 0);
2031
2032         spin_unlock_irqrestore(&il->sta_lock, flags);
2033
2034         return il_send_remove_station(il, addr, sta_id, false);
2035 out_err:
2036         spin_unlock_irqrestore(&il->sta_lock, flags);
2037         return -EINVAL;
2038 }
2039 EXPORT_SYMBOL_GPL(il_remove_station);
2040
2041 /**
2042  * il_clear_ucode_stations - clear ucode station table bits
2043  *
2044  * This function clears all the bits in the driver indicating
2045  * which stations are active in the ucode. Call when something
2046  * other than explicit station management would cause this in
2047  * the ucode, e.g. unassociated RXON.
2048  */
2049 void il_clear_ucode_stations(struct il_priv *il,
2050                               struct il_rxon_context *ctx)
2051 {
2052         int i;
2053         unsigned long flags_spin;
2054         bool cleared = false;
2055
2056         D_INFO("Clearing ucode stations in driver\n");
2057
2058         spin_lock_irqsave(&il->sta_lock, flags_spin);
2059         for (i = 0; i < il->hw_params.max_stations; i++) {
2060                 if (ctx && ctx->ctxid != il->stations[i].ctxid)
2061                         continue;
2062
2063                 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2064                         D_INFO(
2065                                 "Clearing ucode active for station %d\n", i);
2066                         il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2067                         cleared = true;
2068                 }
2069         }
2070         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2071
2072         if (!cleared)
2073                 D_INFO(
2074                         "No active stations found to be cleared\n");
2075 }
2076 EXPORT_SYMBOL(il_clear_ucode_stations);
2077
2078 /**
2079  * il_restore_stations() - Restore driver known stations to device
2080  *
2081  * All stations considered active by driver, but not present in ucode, is
2082  * restored.
2083  *
2084  * Function sleeps.
2085  */
2086 void
2087 il_restore_stations(struct il_priv *il, struct il_rxon_context *ctx)
2088 {
2089         struct il_addsta_cmd sta_cmd;
2090         struct il_link_quality_cmd lq;
2091         unsigned long flags_spin;
2092         int i;
2093         bool found = false;
2094         int ret;
2095         bool send_lq;
2096
2097         if (!il_is_ready(il)) {
2098                 D_INFO(
2099                         "Not ready yet, not restoring any stations.\n");
2100                 return;
2101         }
2102
2103         D_ASSOC("Restoring all known stations ... start.\n");
2104         spin_lock_irqsave(&il->sta_lock, flags_spin);
2105         for (i = 0; i < il->hw_params.max_stations; i++) {
2106                 if (ctx->ctxid != il->stations[i].ctxid)
2107                         continue;
2108                 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2109                     !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2110                         D_ASSOC("Restoring sta %pM\n",
2111                                         il->stations[i].sta.sta.addr);
2112                         il->stations[i].sta.mode = 0;
2113                         il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2114                         found = true;
2115                 }
2116         }
2117
2118         for (i = 0; i < il->hw_params.max_stations; i++) {
2119                 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2120                         memcpy(&sta_cmd, &il->stations[i].sta,
2121                                sizeof(struct il_addsta_cmd));
2122                         send_lq = false;
2123                         if (il->stations[i].lq) {
2124                                 memcpy(&lq, il->stations[i].lq,
2125                                        sizeof(struct il_link_quality_cmd));
2126                                 send_lq = true;
2127                         }
2128                         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2129                         ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2130                         if (ret) {
2131                                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2132                                 IL_ERR("Adding station %pM failed.\n",
2133                                         il->stations[i].sta.sta.addr);
2134                                 il->stations[i].used &=
2135                                                 ~IL_STA_DRIVER_ACTIVE;
2136                                 il->stations[i].used &=
2137                                                 ~IL_STA_UCODE_INPROGRESS;
2138                                 spin_unlock_irqrestore(&il->sta_lock,
2139                                                                 flags_spin);
2140                         }
2141                         /*
2142                          * Rate scaling has already been initialized, send
2143                          * current LQ command
2144                          */
2145                         if (send_lq)
2146                                 il_send_lq_cmd(il, ctx, &lq,
2147                                                                 CMD_SYNC, true);
2148                         spin_lock_irqsave(&il->sta_lock, flags_spin);
2149                         il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2150                 }
2151         }
2152
2153         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2154         if (!found)
2155                 D_INFO("Restoring all known stations"
2156                                 " .... no stations to be restored.\n");
2157         else
2158                 D_INFO("Restoring all known stations"
2159                                 " .... complete.\n");
2160 }
2161 EXPORT_SYMBOL(il_restore_stations);
2162
2163 int il_get_free_ucode_key_idx(struct il_priv *il)
2164 {
2165         int i;
2166
2167         for (i = 0; i < il->sta_key_max_num; i++)
2168                 if (!test_and_set_bit(i, &il->ucode_key_table))
2169                         return i;
2170
2171         return WEP_INVALID_OFFSET;
2172 }
2173 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2174
2175 void il_dealloc_bcast_stations(struct il_priv *il)
2176 {
2177         unsigned long flags;
2178         int i;
2179
2180         spin_lock_irqsave(&il->sta_lock, flags);
2181         for (i = 0; i < il->hw_params.max_stations; i++) {
2182                 if (!(il->stations[i].used & IL_STA_BCAST))
2183                         continue;
2184
2185                 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2186                 il->num_stations--;
2187                 BUG_ON(il->num_stations < 0);
2188                 kfree(il->stations[i].lq);
2189                 il->stations[i].lq = NULL;
2190         }
2191         spin_unlock_irqrestore(&il->sta_lock, flags);
2192 }
2193 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2194
2195 #ifdef CONFIG_IWLEGACY_DEBUG
2196 static void il_dump_lq_cmd(struct il_priv *il,
2197                            struct il_link_quality_cmd *lq)
2198 {
2199         int i;
2200         D_RATE("lq station id 0x%x\n", lq->sta_id);
2201         D_RATE("lq ant 0x%X 0x%X\n",
2202                        lq->general_params.single_stream_ant_msk,
2203                        lq->general_params.dual_stream_ant_msk);
2204
2205         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2206                 D_RATE("lq idx %d 0x%X\n",
2207                                i, lq->rs_table[i].rate_n_flags);
2208 }
2209 #else
2210 static inline void il_dump_lq_cmd(struct il_priv *il,
2211                                    struct il_link_quality_cmd *lq)
2212 {
2213 }
2214 #endif
2215
2216 /**
2217  * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2218  *
2219  * It sometimes happens when a HT rate has been in use and we
2220  * loose connectivity with AP then mac80211 will first tell us that the
2221  * current channel is not HT anymore before removing the station. In such a
2222  * scenario the RXON flags will be updated to indicate we are not
2223  * communicating HT anymore, but the LQ command may still contain HT rates.
2224  * Test for this to prevent driver from sending LQ command between the time
2225  * RXON flags are updated and when LQ command is updated.
2226  */
2227 static bool il_is_lq_table_valid(struct il_priv *il,
2228                               struct il_rxon_context *ctx,
2229                               struct il_link_quality_cmd *lq)
2230 {
2231         int i;
2232
2233         if (ctx->ht.enabled)
2234                 return true;
2235
2236         D_INFO("Channel %u is not an HT channel\n",
2237                        ctx->active.channel);
2238         for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2239                 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
2240                                                 RATE_MCS_HT_MSK) {
2241                         D_INFO(
2242                                        "idx %d of LQ expects HT channel\n",
2243                                        i);
2244                         return false;
2245                 }
2246         }
2247         return true;
2248 }
2249
2250 /**
2251  * il_send_lq_cmd() - Send link quality command
2252  * @init: This command is sent as part of station initialization right
2253  *        after station has been added.
2254  *
2255  * The link quality command is sent as the last step of station creation.
2256  * This is the special case in which init is set and we call a callback in
2257  * this case to clear the state indicating that station creation is in
2258  * progress.
2259  */
2260 int il_send_lq_cmd(struct il_priv *il, struct il_rxon_context *ctx,
2261                     struct il_link_quality_cmd *lq, u8 flags, bool init)
2262 {
2263         int ret = 0;
2264         unsigned long flags_spin;
2265
2266         struct il_host_cmd cmd = {
2267                 .id = C_TX_LINK_QUALITY_CMD,
2268                 .len = sizeof(struct il_link_quality_cmd),
2269                 .flags = flags,
2270                 .data = lq,
2271         };
2272
2273         if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2274                 return -EINVAL;
2275
2276
2277         spin_lock_irqsave(&il->sta_lock, flags_spin);
2278         if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2279                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2280                 return -EINVAL;
2281         }
2282         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2283
2284         il_dump_lq_cmd(il, lq);
2285         BUG_ON(init && (cmd.flags & CMD_ASYNC));
2286
2287         if (il_is_lq_table_valid(il, ctx, lq))
2288                 ret = il_send_cmd(il, &cmd);
2289         else
2290                 ret = -EINVAL;
2291
2292         if (cmd.flags & CMD_ASYNC)
2293                 return ret;
2294
2295         if (init) {
2296                 D_INFO("init LQ command complete,"
2297                                 " clearing sta addition status for sta %d\n",
2298                                lq->sta_id);
2299                 spin_lock_irqsave(&il->sta_lock, flags_spin);
2300                 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2301                 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2302         }
2303         return ret;
2304 }
2305 EXPORT_SYMBOL(il_send_lq_cmd);
2306
2307 int il_mac_sta_remove(struct ieee80211_hw *hw,
2308                        struct ieee80211_vif *vif,
2309                        struct ieee80211_sta *sta)
2310 {
2311         struct il_priv *il = hw->priv;
2312         struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2313         int ret;
2314
2315         D_INFO("received request to remove station %pM\n",
2316                         sta->addr);
2317         mutex_lock(&il->mutex);
2318         D_INFO("proceeding to remove station %pM\n",
2319                         sta->addr);
2320         ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2321         if (ret)
2322                 IL_ERR("Error removing station %pM\n",
2323                         sta->addr);
2324         mutex_unlock(&il->mutex);
2325         return ret;
2326 }
2327 EXPORT_SYMBOL(il_mac_sta_remove);
2328
2329 /************************** RX-FUNCTIONS ****************************/
2330 /*
2331  * Rx theory of operation
2332  *
2333  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2334  * each of which point to Receive Buffers to be filled by the NIC.  These get
2335  * used not only for Rx frames, but for any command response or notification
2336  * from the NIC.  The driver and NIC manage the Rx buffers by means
2337  * of idxes into the circular buffer.
2338  *
2339  * Rx Queue Indexes
2340  * The host/firmware share two idx registers for managing the Rx buffers.
2341  *
2342  * The READ idx maps to the first position that the firmware may be writing
2343  * to -- the driver can read up to (but not including) this position and get
2344  * good data.
2345  * The READ idx is managed by the firmware once the card is enabled.
2346  *
2347  * The WRITE idx maps to the last position the driver has read from -- the
2348  * position preceding WRITE is the last slot the firmware can place a packet.
2349  *
2350  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2351  * WRITE = READ.
2352  *
2353  * During initialization, the host sets up the READ queue position to the first
2354  * IDX position, and WRITE to the last (READ - 1 wrapped)
2355  *
2356  * When the firmware places a packet in a buffer, it will advance the READ idx
2357  * and fire the RX interrupt.  The driver can then query the READ idx and
2358  * process as many packets as possible, moving the WRITE idx forward as it
2359  * resets the Rx queue buffers with new memory.
2360  *
2361  * The management in the driver is as follows:
2362  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2363  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2364  *   to replenish the iwl->rxq->rx_free.
2365  * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2366  *   iwl->rxq is replenished and the READ IDX is updated (updating the
2367  *   'processed' and 'read' driver idxes as well)
2368  * + A received packet is processed and handed to the kernel network stack,
2369  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2370  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2371  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2372  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2373  *   were enough free buffers and RX_STALLED is set it is cleared.
2374  *
2375  *
2376  * Driver sequence:
2377  *
2378  * il_rx_queue_alloc()   Allocates rx_free
2379  * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2380  *                            il_rx_queue_restock
2381  * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2382  *                            queue, updates firmware pointers, and updates
2383  *                            the WRITE idx.  If insufficient rx_free buffers
2384  *                            are available, schedules il_rx_replenish
2385  *
2386  * -- enable interrupts --
2387  * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2388  *                            READ IDX, detaching the SKB from the pool.
2389  *                            Moves the packet buffer from queue to rx_used.
2390  *                            Calls il_rx_queue_restock to refill any empty
2391  *                            slots.
2392  * ...
2393  *
2394  */
2395
2396 /**
2397  * il_rx_queue_space - Return number of free slots available in queue.
2398  */
2399 int il_rx_queue_space(const struct il_rx_queue *q)
2400 {
2401         int s = q->read - q->write;
2402         if (s <= 0)
2403                 s += RX_QUEUE_SIZE;
2404         /* keep some buffer to not confuse full and empty queue */
2405         s -= 2;
2406         if (s < 0)
2407                 s = 0;
2408         return s;
2409 }
2410 EXPORT_SYMBOL(il_rx_queue_space);
2411
2412 /**
2413  * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2414  */
2415 void
2416 il_rx_queue_update_write_ptr(struct il_priv *il,
2417                                         struct il_rx_queue *q)
2418 {
2419         unsigned long flags;
2420         u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2421         u32 reg;
2422
2423         spin_lock_irqsave(&q->lock, flags);
2424
2425         if (q->need_update == 0)
2426                 goto exit_unlock;
2427
2428         /* If power-saving is in use, make sure device is awake */
2429         if (test_bit(S_POWER_PMI, &il->status)) {
2430                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2431
2432                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2433                         D_INFO(
2434                                 "Rx queue requesting wakeup,"
2435                                 " GP1 = 0x%x\n", reg);
2436                         il_set_bit(il, CSR_GP_CNTRL,
2437                                 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2438                         goto exit_unlock;
2439                 }
2440
2441                 q->write_actual = (q->write & ~0x7);
2442                 il_wr(il, rx_wrt_ptr_reg,
2443                                 q->write_actual);
2444
2445         /* Else device is assumed to be awake */
2446         } else {
2447                 /* Device expects a multiple of 8 */
2448                 q->write_actual = (q->write & ~0x7);
2449                 il_wr(il, rx_wrt_ptr_reg,
2450                         q->write_actual);
2451         }
2452
2453         q->need_update = 0;
2454
2455  exit_unlock:
2456         spin_unlock_irqrestore(&q->lock, flags);
2457 }
2458 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2459
2460 int il_rx_queue_alloc(struct il_priv *il)
2461 {
2462         struct il_rx_queue *rxq = &il->rxq;
2463         struct device *dev = &il->pci_dev->dev;
2464         int i;
2465
2466         spin_lock_init(&rxq->lock);
2467         INIT_LIST_HEAD(&rxq->rx_free);
2468         INIT_LIST_HEAD(&rxq->rx_used);
2469
2470         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2471         rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2472                                      GFP_KERNEL);
2473         if (!rxq->bd)
2474                 goto err_bd;
2475
2476         rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2477                                           &rxq->rb_stts_dma, GFP_KERNEL);
2478         if (!rxq->rb_stts)
2479                 goto err_rb;
2480
2481         /* Fill the rx_used queue with _all_ of the Rx buffers */
2482         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2483                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2484
2485         /* Set us so that we have processed and used all buffers, but have
2486          * not restocked the Rx queue with fresh buffers */
2487         rxq->read = rxq->write = 0;
2488         rxq->write_actual = 0;
2489         rxq->free_count = 0;
2490         rxq->need_update = 0;
2491         return 0;
2492
2493 err_rb:
2494         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2495                           rxq->bd_dma);
2496 err_bd:
2497         return -ENOMEM;
2498 }
2499 EXPORT_SYMBOL(il_rx_queue_alloc);
2500
2501
2502 void il_hdl_spectrum_measurement(struct il_priv *il,
2503                                           struct il_rx_buf *rxb)
2504 {
2505         struct il_rx_pkt *pkt = rxb_addr(rxb);
2506         struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2507
2508         if (!report->state) {
2509                 D_11H(
2510                         "Spectrum Measure Notification: Start\n");
2511                 return;
2512         }
2513
2514         memcpy(&il->measure_report, report, sizeof(*report));
2515         il->measurement_status |= MEASUREMENT_READY;
2516 }
2517 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2518
2519 /*
2520  * returns non-zero if packet should be dropped
2521  */
2522 int il_set_decrypted_flag(struct il_priv *il,
2523                            struct ieee80211_hdr *hdr,
2524                            u32 decrypt_res,
2525                            struct ieee80211_rx_status *stats)
2526 {
2527         u16 fc = le16_to_cpu(hdr->frame_control);
2528
2529         /*
2530          * All contexts have the same setting here due to it being
2531          * a module parameter, so OK to check any context.
2532          */
2533         if (il->ctx.active.filter_flags &
2534                                                 RXON_FILTER_DIS_DECRYPT_MSK)
2535                 return 0;
2536
2537         if (!(fc & IEEE80211_FCTL_PROTECTED))
2538                 return 0;
2539
2540         D_RX("decrypt_res:0x%x\n", decrypt_res);
2541         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2542         case RX_RES_STATUS_SEC_TYPE_TKIP:
2543                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2544                  * Decryption will be done in SW. */
2545                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2546                     RX_RES_STATUS_BAD_KEY_TTAK)
2547                         break;
2548
2549         case RX_RES_STATUS_SEC_TYPE_WEP:
2550                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2551                     RX_RES_STATUS_BAD_ICV_MIC) {
2552                         /* bad ICV, the packet is destroyed since the
2553                          * decryption is inplace, drop it */
2554                         D_RX("Packet destroyed\n");
2555                         return -1;
2556                 }
2557         case RX_RES_STATUS_SEC_TYPE_CCMP:
2558                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2559                     RX_RES_STATUS_DECRYPT_OK) {
2560                         D_RX("hw decrypt successfully!!!\n");
2561                         stats->flag |= RX_FLAG_DECRYPTED;
2562                 }
2563                 break;
2564
2565         default:
2566                 break;
2567         }
2568         return 0;
2569 }
2570 EXPORT_SYMBOL(il_set_decrypted_flag);
2571
2572 /**
2573  * il_txq_update_write_ptr - Send new write idx to hardware
2574  */
2575 void
2576 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2577 {
2578         u32 reg = 0;
2579         int txq_id = txq->q.id;
2580
2581         if (txq->need_update == 0)
2582                 return;
2583
2584         /* if we're trying to save power */
2585         if (test_bit(S_POWER_PMI, &il->status)) {
2586                 /* wake up nic if it's powered down ...
2587                  * uCode will wake up, and interrupt us again, so next
2588                  * time we'll skip this part. */
2589                 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2590
2591                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2592                         D_INFO(
2593                                         "Tx queue %d requesting wakeup,"
2594                                         " GP1 = 0x%x\n", txq_id, reg);
2595                         il_set_bit(il, CSR_GP_CNTRL,
2596                                         CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2597                         return;
2598                 }
2599
2600                 il_wr(il, HBUS_TARG_WRPTR,
2601                                 txq->q.write_ptr | (txq_id << 8));
2602
2603                 /*
2604                  * else not in power-save mode,
2605                  * uCode will never sleep when we're
2606                  * trying to tx (during RFKILL, we're not trying to tx).
2607                  */
2608         } else
2609                 _il_wr(il, HBUS_TARG_WRPTR,
2610                             txq->q.write_ptr | (txq_id << 8));
2611         txq->need_update = 0;
2612 }
2613 EXPORT_SYMBOL(il_txq_update_write_ptr);
2614
2615 /**
2616  * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2617  */
2618 void il_tx_queue_unmap(struct il_priv *il, int txq_id)
2619 {
2620         struct il_tx_queue *txq = &il->txq[txq_id];
2621         struct il_queue *q = &txq->q;
2622
2623         if (q->n_bd == 0)
2624                 return;
2625
2626         while (q->write_ptr != q->read_ptr) {
2627                 il->cfg->ops->lib->txq_free_tfd(il, txq);
2628                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2629         }
2630 }
2631 EXPORT_SYMBOL(il_tx_queue_unmap);
2632
2633 /**
2634  * il_tx_queue_free - Deallocate DMA queue.
2635  * @txq: Transmit queue to deallocate.
2636  *
2637  * Empty queue by removing and destroying all BD's.
2638  * Free all buffers.
2639  * 0-fill, but do not free "txq" descriptor structure.
2640  */
2641 void il_tx_queue_free(struct il_priv *il, int txq_id)
2642 {
2643         struct il_tx_queue *txq = &il->txq[txq_id];
2644         struct device *dev = &il->pci_dev->dev;
2645         int i;
2646
2647         il_tx_queue_unmap(il, txq_id);
2648
2649         /* De-alloc array of command/tx buffers */
2650         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2651                 kfree(txq->cmd[i]);
2652
2653         /* De-alloc circular buffer of TFDs */
2654         if (txq->q.n_bd)
2655                 dma_free_coherent(dev, il->hw_params.tfd_size *
2656                                   txq->q.n_bd, txq->tfds, txq->q.dma_addr);
2657
2658         /* De-alloc array of per-TFD driver data */
2659         kfree(txq->txb);
2660         txq->txb = NULL;
2661
2662         /* deallocate arrays */
2663         kfree(txq->cmd);
2664         kfree(txq->meta);
2665         txq->cmd = NULL;
2666         txq->meta = NULL;
2667
2668         /* 0-fill queue descriptor structure */
2669         memset(txq, 0, sizeof(*txq));
2670 }
2671 EXPORT_SYMBOL(il_tx_queue_free);
2672
2673 /**
2674  * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2675  */
2676 void il_cmd_queue_unmap(struct il_priv *il)
2677 {
2678         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2679         struct il_queue *q = &txq->q;
2680         int i;
2681
2682         if (q->n_bd == 0)
2683                 return;
2684
2685         while (q->read_ptr != q->write_ptr) {
2686                 i = il_get_cmd_idx(q, q->read_ptr, 0);
2687
2688                 if (txq->meta[i].flags & CMD_MAPPED) {
2689                         pci_unmap_single(il->pci_dev,
2690                                          dma_unmap_addr(&txq->meta[i], mapping),
2691                                          dma_unmap_len(&txq->meta[i], len),
2692                                          PCI_DMA_BIDIRECTIONAL);
2693                         txq->meta[i].flags = 0;
2694                 }
2695
2696                 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2697         }
2698
2699         i = q->n_win;
2700         if (txq->meta[i].flags & CMD_MAPPED) {
2701                 pci_unmap_single(il->pci_dev,
2702                                  dma_unmap_addr(&txq->meta[i], mapping),
2703                                  dma_unmap_len(&txq->meta[i], len),
2704                                  PCI_DMA_BIDIRECTIONAL);
2705                 txq->meta[i].flags = 0;
2706         }
2707 }
2708 EXPORT_SYMBOL(il_cmd_queue_unmap);
2709
2710 /**
2711  * il_cmd_queue_free - Deallocate DMA queue.
2712  * @txq: Transmit queue to deallocate.
2713  *
2714  * Empty queue by removing and destroying all BD's.
2715  * Free all buffers.
2716  * 0-fill, but do not free "txq" descriptor structure.
2717  */
2718 void il_cmd_queue_free(struct il_priv *il)
2719 {
2720         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2721         struct device *dev = &il->pci_dev->dev;
2722         int i;
2723
2724         il_cmd_queue_unmap(il);
2725
2726         /* De-alloc array of command/tx buffers */
2727         for (i = 0; i <= TFD_CMD_SLOTS; i++)
2728                 kfree(txq->cmd[i]);
2729
2730         /* De-alloc circular buffer of TFDs */
2731         if (txq->q.n_bd)
2732                 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2733                                   txq->tfds, txq->q.dma_addr);
2734
2735         /* deallocate arrays */
2736         kfree(txq->cmd);
2737         kfree(txq->meta);
2738         txq->cmd = NULL;
2739         txq->meta = NULL;
2740
2741         /* 0-fill queue descriptor structure */
2742         memset(txq, 0, sizeof(*txq));
2743 }
2744 EXPORT_SYMBOL(il_cmd_queue_free);
2745
2746 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2747  * DMA services
2748  *
2749  * Theory of operation
2750  *
2751  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2752  * of buffer descriptors, each of which points to one or more data buffers for
2753  * the device to read from or fill.  Driver and device exchange status of each
2754  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2755  * entries in each circular buffer, to protect against confusing empty and full
2756  * queue states.
2757  *
2758  * The device reads or writes the data in the queues via the device's several
2759  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2760  *
2761  * For Tx queue, there are low mark and high mark limits. If, after queuing
2762  * the packet for Tx, free space become < low mark, Tx queue stopped. When
2763  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2764  * Tx queue resumed.
2765  *
2766  * See more detailed info in 4965.h.
2767  ***************************************************/
2768
2769 int il_queue_space(const struct il_queue *q)
2770 {
2771         int s = q->read_ptr - q->write_ptr;
2772
2773         if (q->read_ptr > q->write_ptr)
2774                 s -= q->n_bd;
2775
2776         if (s <= 0)
2777                 s += q->n_win;
2778         /* keep some reserve to not confuse empty and full situations */
2779         s -= 2;
2780         if (s < 0)
2781                 s = 0;
2782         return s;
2783 }
2784 EXPORT_SYMBOL(il_queue_space);
2785
2786
2787 /**
2788  * il_queue_init - Initialize queue's high/low-water and read/write idxes
2789  */
2790 static int il_queue_init(struct il_priv *il, struct il_queue *q,
2791                           int count, int slots_num, u32 id)
2792 {
2793         q->n_bd = count;
2794         q->n_win = slots_num;
2795         q->id = id;
2796
2797         /* count must be power-of-two size, otherwise il_queue_inc_wrap
2798          * and il_queue_dec_wrap are broken. */
2799         BUG_ON(!is_power_of_2(count));
2800
2801         /* slots_num must be power-of-two size, otherwise
2802          * il_get_cmd_idx is broken. */
2803         BUG_ON(!is_power_of_2(slots_num));
2804
2805         q->low_mark = q->n_win / 4;
2806         if (q->low_mark < 4)
2807                 q->low_mark = 4;
2808
2809         q->high_mark = q->n_win / 8;
2810         if (q->high_mark < 2)
2811                 q->high_mark = 2;
2812
2813         q->write_ptr = q->read_ptr = 0;
2814
2815         return 0;
2816 }
2817
2818 /**
2819  * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2820  */
2821 static int il_tx_queue_alloc(struct il_priv *il,
2822                               struct il_tx_queue *txq, u32 id)
2823 {
2824         struct device *dev = &il->pci_dev->dev;
2825         size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2826
2827         /* Driver ilate data, only for Tx (not command) queues,
2828          * not shared with device. */
2829         if (id != il->cmd_queue) {
2830                 txq->txb = kzalloc(sizeof(txq->txb[0]) *
2831                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
2832                 if (!txq->txb) {
2833                         IL_ERR("kmalloc for auxiliary BD "
2834                                   "structures failed\n");
2835                         goto error;
2836                 }
2837         } else {
2838                 txq->txb = NULL;
2839         }
2840
2841         /* Circular buffer of transmit frame descriptors (TFDs),
2842          * shared with device */
2843         txq->tfds = dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr,
2844                                        GFP_KERNEL);
2845         if (!txq->tfds) {
2846                 IL_ERR("pci_alloc_consistent(%zd) failed\n", tfd_sz);
2847                 goto error;
2848         }
2849         txq->q.id = id;
2850
2851         return 0;
2852
2853  error:
2854         kfree(txq->txb);
2855         txq->txb = NULL;
2856
2857         return -ENOMEM;
2858 }
2859
2860 /**
2861  * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2862  */
2863 int il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq,
2864                       int slots_num, u32 txq_id)
2865 {
2866         int i, len;
2867         int ret;
2868         int actual_slots = slots_num;
2869
2870         /*
2871          * Alloc buffer array for commands (Tx or other types of commands).
2872          * For the command queue (#4/#9), allocate command space + one big
2873          * command for scan, since scan command is very huge; the system will
2874          * not have two scans at the same time, so only one is needed.
2875          * For normal Tx queues (all other queues), no super-size command
2876          * space is needed.
2877          */
2878         if (txq_id == il->cmd_queue)
2879                 actual_slots++;
2880
2881         txq->meta = kzalloc(sizeof(struct il_cmd_meta) * actual_slots,
2882                             GFP_KERNEL);
2883         txq->cmd = kzalloc(sizeof(struct il_device_cmd *) * actual_slots,
2884                            GFP_KERNEL);
2885
2886         if (!txq->meta || !txq->cmd)
2887                 goto out_free_arrays;
2888
2889         len = sizeof(struct il_device_cmd);
2890         for (i = 0; i < actual_slots; i++) {
2891                 /* only happens for cmd queue */
2892                 if (i == slots_num)
2893                         len = IL_MAX_CMD_SIZE;
2894
2895                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
2896                 if (!txq->cmd[i])
2897                         goto err;
2898         }
2899
2900         /* Alloc driver data array and TFD circular buffer */
2901         ret = il_tx_queue_alloc(il, txq, txq_id);
2902         if (ret)
2903                 goto err;
2904
2905         txq->need_update = 0;
2906
2907         /*
2908          * For the default queues 0-3, set up the swq_id
2909          * already -- all others need to get one later
2910          * (if they need one at all).
2911          */
2912         if (txq_id < 4)
2913                 il_set_swq_id(txq, txq_id, txq_id);
2914
2915         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2916          * il_queue_inc_wrap and il_queue_dec_wrap are broken. */
2917         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2918
2919         /* Initialize queue's high/low-water marks, and head/tail idxes */
2920         il_queue_init(il, &txq->q,
2921                                 TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2922
2923         /* Tell device where to find queue */
2924         il->cfg->ops->lib->txq_init(il, txq);
2925
2926         return 0;
2927 err:
2928         for (i = 0; i < actual_slots; i++)
2929                 kfree(txq->cmd[i]);
2930 out_free_arrays:
2931         kfree(txq->meta);
2932         kfree(txq->cmd);
2933
2934         return -ENOMEM;
2935 }
2936 EXPORT_SYMBOL(il_tx_queue_init);
2937
2938 void il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq,
2939                         int slots_num, u32 txq_id)
2940 {
2941         int actual_slots = slots_num;
2942
2943         if (txq_id == il->cmd_queue)
2944                 actual_slots++;
2945
2946         memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
2947
2948         txq->need_update = 0;
2949
2950         /* Initialize queue's high/low-water marks, and head/tail idxes */
2951         il_queue_init(il, &txq->q,
2952                                 TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
2953
2954         /* Tell device where to find queue */
2955         il->cfg->ops->lib->txq_init(il, txq);
2956 }
2957 EXPORT_SYMBOL(il_tx_queue_reset);
2958
2959 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
2960
2961 /**
2962  * il_enqueue_hcmd - enqueue a uCode command
2963  * @il: device ilate data point
2964  * @cmd: a point to the ucode command structure
2965  *
2966  * The function returns < 0 values to indicate the operation is
2967  * failed. On success, it turns the idx (> 0) of command in the
2968  * command queue.
2969  */
2970 int il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
2971 {
2972         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2973         struct il_queue *q = &txq->q;
2974         struct il_device_cmd *out_cmd;
2975         struct il_cmd_meta *out_meta;
2976         dma_addr_t phys_addr;
2977         unsigned long flags;
2978         int len;
2979         u32 idx;
2980         u16 fix_size;
2981
2982         cmd->len = il->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
2983         fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
2984
2985         /* If any of the command structures end up being larger than
2986          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
2987          * we will need to increase the size of the TFD entries
2988          * Also, check to see if command buffer should not exceed the size
2989          * of device_cmd and max_cmd_size. */
2990         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
2991                !(cmd->flags & CMD_SIZE_HUGE));
2992         BUG_ON(fix_size > IL_MAX_CMD_SIZE);
2993
2994         if (il_is_rfkill(il) || il_is_ctkill(il)) {
2995                 IL_WARN("Not sending command - %s KILL\n",
2996                          il_is_rfkill(il) ? "RF" : "CT");
2997                 return -EIO;
2998         }
2999
3000         spin_lock_irqsave(&il->hcmd_lock, flags);
3001
3002         if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3003                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3004
3005                 IL_ERR("Restarting adapter due to command queue full\n");
3006                 queue_work(il->workqueue, &il->restart);
3007                 return -ENOSPC;
3008         }
3009
3010         idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3011         out_cmd = txq->cmd[idx];
3012         out_meta = &txq->meta[idx];
3013
3014         if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3015                 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3016                 return -ENOSPC;
3017         }
3018
3019         memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3020         out_meta->flags = cmd->flags | CMD_MAPPED;
3021         if (cmd->flags & CMD_WANT_SKB)
3022                 out_meta->source = cmd;
3023         if (cmd->flags & CMD_ASYNC)
3024                 out_meta->callback = cmd->callback;
3025
3026         out_cmd->hdr.cmd = cmd->id;
3027         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3028
3029         /* At this point, the out_cmd now has all of the incoming cmd
3030          * information */
3031
3032         out_cmd->hdr.flags = 0;
3033         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) |
3034                         IDX_TO_SEQ(q->write_ptr));
3035         if (cmd->flags & CMD_SIZE_HUGE)
3036                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3037         len = sizeof(struct il_device_cmd);
3038         if (idx == TFD_CMD_SLOTS)
3039                 len = IL_MAX_CMD_SIZE;
3040
3041 #ifdef CONFIG_IWLEGACY_DEBUG
3042         switch (out_cmd->hdr.cmd) {
3043         case C_TX_LINK_QUALITY_CMD:
3044         case C_SENSITIVITY:
3045                 D_HC_DUMP(
3046                                 "Sending command %s (#%x), seq: 0x%04X, "
3047                                 "%d bytes at %d[%d]:%d\n",
3048                                 il_get_cmd_string(out_cmd->hdr.cmd),
3049                                 out_cmd->hdr.cmd,
3050                                 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3051                                 q->write_ptr, idx, il->cmd_queue);
3052                 break;
3053         default:
3054                 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3055                                 "%d bytes at %d[%d]:%d\n",
3056                                 il_get_cmd_string(out_cmd->hdr.cmd),
3057                                 out_cmd->hdr.cmd,
3058                                 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3059                                 q->write_ptr, idx, il->cmd_queue);
3060         }
3061 #endif
3062         txq->need_update = 1;
3063
3064         if (il->cfg->ops->lib->txq_update_byte_cnt_tbl)
3065                 /* Set up entry in queue's byte count circular buffer */
3066                 il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0);
3067
3068         phys_addr = pci_map_single(il->pci_dev, &out_cmd->hdr,
3069                                    fix_size, PCI_DMA_BIDIRECTIONAL);
3070         dma_unmap_addr_set(out_meta, mapping, phys_addr);
3071         dma_unmap_len_set(out_meta, len, fix_size);
3072
3073         il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
3074                                                    phys_addr, fix_size, 1,
3075                                                    U32_PAD(cmd->len));
3076
3077         /* Increment and update queue's write idx */
3078         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3079         il_txq_update_write_ptr(il, txq);
3080
3081         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3082         return idx;
3083 }
3084
3085 /**
3086  * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3087  *
3088  * When FW advances 'R' idx, all entries between old and new 'R' idx
3089  * need to be reclaimed. As result, some free space forms.  If there is
3090  * enough free space (> low mark), wake the stack that feeds us.
3091  */
3092 static void il_hcmd_queue_reclaim(struct il_priv *il, int txq_id,
3093                                    int idx, int cmd_idx)
3094 {
3095         struct il_tx_queue *txq = &il->txq[txq_id];
3096         struct il_queue *q = &txq->q;
3097         int nfreed = 0;
3098
3099         if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3100                 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3101                           "is out of range [0-%d] %d %d.\n", txq_id,
3102                           idx, q->n_bd, q->write_ptr, q->read_ptr);
3103                 return;
3104         }
3105
3106         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3107              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3108
3109                 if (nfreed++ > 0) {
3110                         IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3111                                         q->write_ptr, q->read_ptr);
3112                         queue_work(il->workqueue, &il->restart);
3113                 }
3114
3115         }
3116 }
3117
3118 /**
3119  * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3120  * @rxb: Rx buffer to reclaim
3121  *
3122  * If an Rx buffer has an async callback associated with it the callback
3123  * will be executed.  The attached skb (if present) will only be freed
3124  * if the callback returns 1
3125  */
3126 void
3127 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3128 {
3129         struct il_rx_pkt *pkt = rxb_addr(rxb);
3130         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3131         int txq_id = SEQ_TO_QUEUE(sequence);
3132         int idx = SEQ_TO_IDX(sequence);
3133         int cmd_idx;
3134         bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3135         struct il_device_cmd *cmd;
3136         struct il_cmd_meta *meta;
3137         struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3138         unsigned long flags;
3139
3140         /* If a Tx command is being handled and it isn't in the actual
3141          * command queue then there a command routing bug has been introduced
3142          * in the queue management code. */
3143         if (WARN(txq_id != il->cmd_queue,
3144                  "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3145                   txq_id, il->cmd_queue, sequence,
3146                   il->txq[il->cmd_queue].q.read_ptr,
3147                   il->txq[il->cmd_queue].q.write_ptr)) {
3148                 il_print_hex_error(il, pkt, 32);
3149                 return;
3150         }
3151
3152         cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3153         cmd = txq->cmd[cmd_idx];
3154         meta = &txq->meta[cmd_idx];
3155
3156         txq->time_stamp = jiffies;
3157
3158         pci_unmap_single(il->pci_dev,
3159                          dma_unmap_addr(meta, mapping),
3160                          dma_unmap_len(meta, len),
3161                          PCI_DMA_BIDIRECTIONAL);
3162
3163         /* Input error checking is done when commands are added to queue. */
3164         if (meta->flags & CMD_WANT_SKB) {
3165                 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3166                 rxb->page = NULL;
3167         } else if (meta->callback)
3168                 meta->callback(il, cmd, pkt);
3169
3170         spin_lock_irqsave(&il->hcmd_lock, flags);
3171
3172         il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3173
3174         if (!(meta->flags & CMD_ASYNC)) {
3175                 clear_bit(S_HCMD_ACTIVE, &il->status);
3176                 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3177                                il_get_cmd_string(cmd->hdr.cmd));
3178                 wake_up(&il->wait_command_queue);
3179         }
3180
3181         /* Mark as unmapped */
3182         meta->flags = 0;
3183
3184         spin_unlock_irqrestore(&il->hcmd_lock, flags);
3185 }
3186 EXPORT_SYMBOL(il_tx_cmd_complete);
3187
3188 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3189 MODULE_VERSION(IWLWIFI_VERSION);
3190 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3191 MODULE_LICENSE("GPL");
3192
3193 /*
3194  * set bt_coex_active to true, uCode will do kill/defer
3195  * every time the priority line is asserted (BT is sending signals on the
3196  * priority line in the PCIx).
3197  * set bt_coex_active to false, uCode will ignore the BT activity and
3198  * perform the normal operation
3199  *
3200  * User might experience transmit issue on some platform due to WiFi/BT
3201  * co-exist problem. The possible behaviors are:
3202  *   Able to scan and finding all the available AP
3203  *   Not able to associate with any AP
3204  * On those platforms, WiFi communication can be restored by set
3205  * "bt_coex_active" module parameter to "false"
3206  *
3207  * default: bt_coex_active = true (BT_COEX_ENABLE)
3208  */
3209 static bool bt_coex_active = true;
3210 module_param(bt_coex_active, bool, S_IRUGO);
3211 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3212
3213 u32 il_debug_level;
3214 EXPORT_SYMBOL(il_debug_level);
3215
3216 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3217 EXPORT_SYMBOL(il_bcast_addr);
3218
3219
3220 /* This function both allocates and initializes hw and il. */
3221 struct ieee80211_hw *il_alloc_all(struct il_cfg *cfg)
3222 {
3223         struct il_priv *il;
3224         /* mac80211 allocates memory for this device instance, including
3225          *   space for this driver's ilate structure */
3226         struct ieee80211_hw *hw;
3227
3228         hw = ieee80211_alloc_hw(sizeof(struct il_priv),
3229                                 cfg->ops->ieee80211_ops);
3230         if (hw == NULL) {
3231                 pr_err("%s: Can not allocate network device\n",
3232                        cfg->name);
3233                 goto out;
3234         }
3235
3236         il = hw->priv;
3237         il->hw = hw;
3238
3239 out:
3240         return hw;
3241 }
3242 EXPORT_SYMBOL(il_alloc_all);
3243
3244 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3245 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3246 static void il_init_ht_hw_capab(const struct il_priv *il,
3247                               struct ieee80211_sta_ht_cap *ht_info,
3248                               enum ieee80211_band band)
3249 {
3250         u16 max_bit_rate = 0;
3251         u8 rx_chains_num = il->hw_params.rx_chains_num;
3252         u8 tx_chains_num = il->hw_params.tx_chains_num;
3253
3254         ht_info->cap = 0;
3255         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3256
3257         ht_info->ht_supported = true;
3258
3259         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3260         max_bit_rate = MAX_BIT_RATE_20_MHZ;
3261         if (il->hw_params.ht40_channel & BIT(band)) {
3262                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3263                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3264                 ht_info->mcs.rx_mask[4] = 0x01;
3265                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3266         }
3267
3268         if (il->cfg->mod_params->amsdu_size_8K)
3269                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3270
3271         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3272         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3273
3274         ht_info->mcs.rx_mask[0] = 0xFF;
3275         if (rx_chains_num >= 2)
3276                 ht_info->mcs.rx_mask[1] = 0xFF;
3277         if (rx_chains_num >= 3)
3278                 ht_info->mcs.rx_mask[2] = 0xFF;
3279
3280         /* Highest supported Rx data rate */
3281         max_bit_rate *= rx_chains_num;
3282         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3283         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3284
3285         /* Tx MCS capabilities */
3286         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3287         if (tx_chains_num != rx_chains_num) {
3288                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3289                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
3290                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3291         }
3292 }
3293
3294 /**
3295  * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3296  */
3297 int il_init_geos(struct il_priv *il)
3298 {
3299         struct il_channel_info *ch;
3300         struct ieee80211_supported_band *sband;
3301         struct ieee80211_channel *channels;
3302         struct ieee80211_channel *geo_ch;
3303         struct ieee80211_rate *rates;
3304         int i = 0;
3305         s8 max_tx_power = 0;
3306
3307         if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3308             il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3309                 D_INFO("Geography modes already initialized.\n");
3310                 set_bit(S_GEO_CONFIGURED, &il->status);
3311                 return 0;
3312         }
3313
3314         channels = kzalloc(sizeof(struct ieee80211_channel) *
3315                            il->channel_count, GFP_KERNEL);
3316         if (!channels)
3317                 return -ENOMEM;
3318
3319         rates = kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3320                         GFP_KERNEL);
3321         if (!rates) {
3322                 kfree(channels);
3323                 return -ENOMEM;
3324         }
3325
3326         /* 5.2GHz channels start after the 2.4GHz channels */
3327         sband = &il->bands[IEEE80211_BAND_5GHZ];
3328         sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3329         /* just OFDM */
3330         sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3331         sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3332
3333         if (il->cfg->sku & IL_SKU_N)
3334                 il_init_ht_hw_capab(il, &sband->ht_cap,
3335                                          IEEE80211_BAND_5GHZ);
3336
3337         sband = &il->bands[IEEE80211_BAND_2GHZ];
3338         sband->channels = channels;
3339         /* OFDM & CCK */
3340         sband->bitrates = rates;
3341         sband->n_bitrates = RATE_COUNT_LEGACY;
3342
3343         if (il->cfg->sku & IL_SKU_N)
3344                 il_init_ht_hw_capab(il, &sband->ht_cap,
3345                                          IEEE80211_BAND_2GHZ);
3346
3347         il->ieee_channels = channels;
3348         il->ieee_rates = rates;
3349
3350         for (i = 0;  i < il->channel_count; i++) {
3351                 ch = &il->channel_info[i];
3352
3353                 if (!il_is_channel_valid(ch))
3354                         continue;
3355
3356                 sband = &il->bands[ch->band];
3357
3358                 geo_ch = &sband->channels[sband->n_channels++];
3359
3360                 geo_ch->center_freq =
3361                         ieee80211_channel_to_frequency(ch->channel, ch->band);
3362                 geo_ch->max_power = ch->max_power_avg;
3363                 geo_ch->max_antenna_gain = 0xff;
3364                 geo_ch->hw_value = ch->channel;
3365
3366                 if (il_is_channel_valid(ch)) {
3367                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3368                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3369
3370                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3371                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3372
3373                         if (ch->flags & EEPROM_CHANNEL_RADAR)
3374                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3375
3376                         geo_ch->flags |= ch->ht40_extension_channel;
3377
3378                         if (ch->max_power_avg > max_tx_power)
3379                                 max_tx_power = ch->max_power_avg;
3380                 } else {
3381                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3382                 }
3383
3384                 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
3385                                 ch->channel, geo_ch->center_freq,
3386                                 il_is_channel_a_band(ch) ?  "5.2" : "2.4",
3387                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
3388                                 "restricted" : "valid",
3389                                  geo_ch->flags);
3390         }
3391
3392         il->tx_power_device_lmt = max_tx_power;
3393         il->tx_power_user_lmt = max_tx_power;
3394         il->tx_power_next = max_tx_power;
3395
3396         if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3397             (il->cfg->sku & IL_SKU_A)) {
3398                 IL_INFO("Incorrectly detected BG card as ABG. "
3399                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3400                            il->pci_dev->device,
3401                            il->pci_dev->subsystem_device);
3402                 il->cfg->sku &= ~IL_SKU_A;
3403         }
3404
3405         IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3406                    il->bands[IEEE80211_BAND_2GHZ].n_channels,
3407                    il->bands[IEEE80211_BAND_5GHZ].n_channels);
3408
3409         set_bit(S_GEO_CONFIGURED, &il->status);
3410
3411         return 0;
3412 }
3413 EXPORT_SYMBOL(il_init_geos);
3414
3415 /*
3416  * il_free_geos - undo allocations in il_init_geos
3417  */
3418 void il_free_geos(struct il_priv *il)
3419 {
3420         kfree(il->ieee_channels);
3421         kfree(il->ieee_rates);
3422         clear_bit(S_GEO_CONFIGURED, &il->status);
3423 }
3424 EXPORT_SYMBOL(il_free_geos);
3425
3426 static bool il_is_channel_extension(struct il_priv *il,
3427                                      enum ieee80211_band band,
3428                                      u16 channel, u8 extension_chan_offset)
3429 {
3430         const struct il_channel_info *ch_info;
3431
3432         ch_info = il_get_channel_info(il, band, channel);
3433         if (!il_is_channel_valid(ch_info))
3434                 return false;
3435
3436         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3437                 return !(ch_info->ht40_extension_channel &
3438                                         IEEE80211_CHAN_NO_HT40PLUS);
3439         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3440                 return !(ch_info->ht40_extension_channel &
3441                                         IEEE80211_CHAN_NO_HT40MINUS);
3442
3443         return false;
3444 }
3445
3446 bool il_is_ht40_tx_allowed(struct il_priv *il,
3447                             struct il_rxon_context *ctx,
3448                             struct ieee80211_sta_ht_cap *ht_cap)
3449 {
3450         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
3451                 return false;
3452
3453         /*
3454          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3455          * the bit will not set if it is pure 40MHz case
3456          */
3457         if (ht_cap && !ht_cap->ht_supported)
3458                 return false;
3459
3460 #ifdef CONFIG_IWLEGACY_DEBUGFS
3461         if (il->disable_ht40)
3462                 return false;
3463 #endif
3464
3465         return il_is_channel_extension(il, il->band,
3466                         le16_to_cpu(ctx->staging.channel),
3467                         ctx->ht.extension_chan_offset);
3468 }
3469 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3470
3471 static u16 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3472 {
3473         u16 new_val;
3474         u16 beacon_factor;
3475
3476         /*
3477          * If mac80211 hasn't given us a beacon interval, program
3478          * the default into the device.
3479          */
3480         if (!beacon_val)
3481                 return DEFAULT_BEACON_INTERVAL;
3482
3483         /*
3484          * If the beacon interval we obtained from the peer
3485          * is too large, we'll have to wake up more often
3486          * (and in IBSS case, we'll beacon too much)
3487          *
3488          * For example, if max_beacon_val is 4096, and the
3489          * requested beacon interval is 7000, we'll have to
3490          * use 3500 to be able to wake up on the beacons.
3491          *
3492          * This could badly influence beacon detection stats.
3493          */
3494
3495         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3496         new_val = beacon_val / beacon_factor;
3497
3498         if (!new_val)
3499                 new_val = max_beacon_val;
3500
3501         return new_val;
3502 }
3503
3504 int
3505 il_send_rxon_timing(struct il_priv *il, struct il_rxon_context *ctx)
3506 {
3507         u64 tsf;
3508         s32 interval_tm, rem;
3509         struct ieee80211_conf *conf = NULL;
3510         u16 beacon_int;
3511         struct ieee80211_vif *vif = ctx->vif;
3512
3513         conf = &il->hw->conf;
3514
3515         lockdep_assert_held(&il->mutex);
3516
3517         memset(&ctx->timing, 0, sizeof(struct il_rxon_time_cmd));
3518
3519         ctx->timing.timestamp = cpu_to_le64(il->timestamp);
3520         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3521
3522         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3523
3524         /*
3525          * TODO: For IBSS we need to get atim_win from mac80211,
3526          *       for now just always use 0
3527          */
3528         ctx->timing.atim_win = 0;
3529
3530         beacon_int = il_adjust_beacon_interval(beacon_int,
3531                         il->hw_params.max_beacon_itrvl * TIME_UNIT);
3532         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
3533
3534         tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3535         interval_tm = beacon_int * TIME_UNIT;
3536         rem = do_div(tsf, interval_tm);
3537         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3538
3539         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
3540
3541         D_ASSOC(
3542                         "beacon interval %d beacon timer %d beacon tim %d\n",
3543                         le16_to_cpu(ctx->timing.beacon_interval),
3544                         le32_to_cpu(ctx->timing.beacon_init_val),
3545                         le16_to_cpu(ctx->timing.atim_win));
3546
3547         return il_send_cmd_pdu(il, ctx->rxon_timing_cmd,
3548                                 sizeof(ctx->timing), &ctx->timing);
3549 }
3550 EXPORT_SYMBOL(il_send_rxon_timing);
3551
3552 void
3553 il_set_rxon_hwcrypto(struct il_priv *il,
3554                                 struct il_rxon_context *ctx,
3555                                 int hw_decrypt)
3556 {
3557         struct il_rxon_cmd *rxon = &ctx->staging;
3558
3559         if (hw_decrypt)
3560                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3561         else
3562                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3563
3564 }
3565 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3566
3567 /* validate RXON structure is valid */
3568 int
3569 il_check_rxon_cmd(struct il_priv *il, struct il_rxon_context *ctx)
3570 {
3571         struct il_rxon_cmd *rxon = &ctx->staging;
3572         bool error = false;
3573
3574         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3575                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3576                         IL_WARN("check 2.4G: wrong narrow\n");
3577                         error = true;
3578                 }
3579                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3580                         IL_WARN("check 2.4G: wrong radar\n");
3581                         error = true;
3582                 }
3583         } else {
3584                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3585                         IL_WARN("check 5.2G: not short slot!\n");
3586                         error = true;
3587                 }
3588                 if (rxon->flags & RXON_FLG_CCK_MSK) {
3589                         IL_WARN("check 5.2G: CCK!\n");
3590                         error = true;
3591                 }
3592         }
3593         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3594                 IL_WARN("mac/bssid mcast!\n");
3595                 error = true;
3596         }
3597
3598         /* make sure basic rates 6Mbps and 1Mbps are supported */
3599         if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3600             (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3601                 IL_WARN("neither 1 nor 6 are basic\n");
3602                 error = true;
3603         }
3604
3605         if (le16_to_cpu(rxon->assoc_id) > 2007) {
3606                 IL_WARN("aid > 2007\n");
3607                 error = true;
3608         }
3609
3610         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
3611                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3612                 IL_WARN("CCK and short slot\n");
3613                 error = true;
3614         }
3615
3616         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
3617                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3618                 IL_WARN("CCK and auto detect");
3619                 error = true;
3620         }
3621
3622         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
3623                             RXON_FLG_TGG_PROTECT_MSK)) ==
3624                             RXON_FLG_TGG_PROTECT_MSK) {
3625                 IL_WARN("TGg but no auto-detect\n");
3626                 error = true;
3627         }
3628
3629         if (error)
3630                 IL_WARN("Tuning to channel %d\n",
3631                             le16_to_cpu(rxon->channel));
3632
3633         if (error) {
3634                 IL_ERR("Invalid RXON\n");
3635                 return -EINVAL;
3636         }
3637         return 0;
3638 }
3639 EXPORT_SYMBOL(il_check_rxon_cmd);
3640
3641 /**
3642  * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3643  * @il: staging_rxon is compared to active_rxon
3644  *
3645  * If the RXON structure is changing enough to require a new tune,
3646  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3647  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3648  */
3649 int il_full_rxon_required(struct il_priv *il,
3650                            struct il_rxon_context *ctx)
3651 {
3652         const struct il_rxon_cmd *staging = &ctx->staging;
3653         const struct il_rxon_cmd *active = &ctx->active;
3654
3655 #define CHK(cond)                                                       \
3656         if ((cond)) {                                                   \
3657                 D_INFO("need full RXON - " #cond "\n"); \
3658                 return 1;                                               \
3659         }
3660
3661 #define CHK_NEQ(c1, c2)                                         \
3662         if ((c1) != (c2)) {                                     \
3663                 D_INFO("need full RXON - "      \
3664                                #c1 " != " #c2 " - %d != %d\n",  \
3665                                (c1), (c2));                     \
3666                 return 1;                                       \
3667         }
3668
3669         /* These items are only settable from the full RXON command */
3670         CHK(!il_is_associated_ctx(ctx));
3671         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
3672         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
3673         CHK(compare_ether_addr(staging->wlap_bssid_addr,
3674                                 active->wlap_bssid_addr));
3675         CHK_NEQ(staging->dev_type, active->dev_type);
3676         CHK_NEQ(staging->channel, active->channel);
3677         CHK_NEQ(staging->air_propagation, active->air_propagation);
3678         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3679                 active->ofdm_ht_single_stream_basic_rates);
3680         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3681                 active->ofdm_ht_dual_stream_basic_rates);
3682         CHK_NEQ(staging->assoc_id, active->assoc_id);
3683
3684         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3685          * be updated with the RXON_ASSOC command -- however only some
3686          * flag transitions are allowed using RXON_ASSOC */
3687
3688         /* Check if we are not switching bands */
3689         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3690                 active->flags & RXON_FLG_BAND_24G_MSK);
3691
3692         /* Check if we are switching association toggle */
3693         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3694                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3695
3696 #undef CHK
3697 #undef CHK_NEQ
3698
3699         return 0;
3700 }
3701 EXPORT_SYMBOL(il_full_rxon_required);
3702
3703 u8 il_get_lowest_plcp(struct il_priv *il,
3704                             struct il_rxon_context *ctx)
3705 {
3706         /*
3707          * Assign the lowest rate -- should really get this from
3708          * the beacon skb from mac80211.
3709          */
3710         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
3711                 return RATE_1M_PLCP;
3712         else
3713                 return RATE_6M_PLCP;
3714 }
3715 EXPORT_SYMBOL(il_get_lowest_plcp);
3716
3717 static void _il_set_rxon_ht(struct il_priv *il,
3718                              struct il_ht_config *ht_conf,
3719                              struct il_rxon_context *ctx)
3720 {
3721         struct il_rxon_cmd *rxon = &ctx->staging;
3722
3723         if (!ctx->ht.enabled) {
3724                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
3725                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
3726                         RXON_FLG_HT40_PROT_MSK |
3727                         RXON_FLG_HT_PROT_MSK);
3728                 return;
3729         }
3730
3731         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
3732                                         RXON_FLG_HT_OPERATING_MODE_POS);
3733
3734         /* Set up channel bandwidth:
3735          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3736         /* clear the HT channel mode before set the mode */
3737         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
3738                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3739         if (il_is_ht40_tx_allowed(il, ctx, NULL)) {
3740                 /* pure ht40 */
3741                 if (ctx->ht.protection ==
3742                                 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3743                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3744                         /* Note: control channel is opposite of extension channel */
3745                         switch (ctx->ht.extension_chan_offset) {
3746                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3747                                 rxon->flags &=
3748                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3749                                 break;
3750                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3751                                 rxon->flags |=
3752                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3753                                 break;
3754                         }
3755                 } else {
3756                         /* Note: control channel is opposite of extension channel */
3757                         switch (ctx->ht.extension_chan_offset) {
3758                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3759                                 rxon->flags &=
3760                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3761                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3762                                 break;
3763                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3764                                 rxon->flags |=
3765                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3766                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3767                                 break;
3768                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3769                         default:
3770                                 /* channel location only valid if in Mixed mode */
3771                                 IL_ERR(
3772                                         "invalid extension channel offset\n");
3773                                 break;
3774                         }
3775                 }
3776         } else {
3777                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3778         }
3779
3780         if (il->cfg->ops->hcmd->set_rxon_chain)
3781                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
3782
3783         D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3784                         "extension channel offset 0x%x\n",
3785                         le32_to_cpu(rxon->flags), ctx->ht.protection,
3786                         ctx->ht.extension_chan_offset);
3787 }
3788
3789 void il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3790 {
3791         _il_set_rxon_ht(il, ht_conf, &il->ctx);
3792 }
3793 EXPORT_SYMBOL(il_set_rxon_ht);
3794
3795 /* Return valid, unused, channel for a passive scan to reset the RF */
3796 u8 il_get_single_channel_number(struct il_priv *il,
3797                                  enum ieee80211_band band)
3798 {
3799         const struct il_channel_info *ch_info;
3800         int i;
3801         u8 channel = 0;
3802         u8 min, max;
3803
3804         if (band == IEEE80211_BAND_5GHZ) {
3805                 min = 14;
3806                 max = il->channel_count;
3807         } else {
3808                 min = 0;
3809                 max = 14;
3810         }
3811
3812         for (i = min; i < max; i++) {
3813                 channel = il->channel_info[i].channel;
3814                 if (channel == le16_to_cpu(il->ctx.staging.channel))
3815                         continue;
3816
3817                 ch_info = il_get_channel_info(il, band, channel);
3818                 if (il_is_channel_valid(ch_info))
3819                         break;
3820         }
3821
3822         return channel;
3823 }
3824 EXPORT_SYMBOL(il_get_single_channel_number);
3825
3826 /**
3827  * il_set_rxon_channel - Set the band and channel values in staging RXON
3828  * @ch: requested channel as a pointer to struct ieee80211_channel
3829
3830  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3831  * in the staging RXON flag structure based on the ch->band
3832  */
3833 int
3834 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch,
3835                          struct il_rxon_context *ctx)
3836 {
3837         enum ieee80211_band band = ch->band;
3838         u16 channel = ch->hw_value;
3839
3840         if (le16_to_cpu(ctx->staging.channel) == channel && il->band == band)
3841                 return 0;
3842
3843         ctx->staging.channel = cpu_to_le16(channel);
3844         if (band == IEEE80211_BAND_5GHZ)
3845                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3846         else
3847                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3848
3849         il->band = band;
3850
3851         D_INFO("Staging channel set to %d [%d]\n", channel, band);
3852
3853         return 0;
3854 }
3855 EXPORT_SYMBOL(il_set_rxon_channel);
3856
3857 void il_set_flags_for_band(struct il_priv *il,
3858                             struct il_rxon_context *ctx,
3859                             enum ieee80211_band band,
3860                             struct ieee80211_vif *vif)
3861 {
3862         if (band == IEEE80211_BAND_5GHZ) {
3863                 ctx->staging.flags &=
3864                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
3865                       | RXON_FLG_CCK_MSK);
3866                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3867         } else {
3868                 /* Copied from il_post_associate() */
3869                 if (vif && vif->bss_conf.use_short_slot)
3870                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3871                 else
3872                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3873
3874                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
3875                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3876                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
3877         }
3878 }
3879 EXPORT_SYMBOL(il_set_flags_for_band);
3880
3881 /*
3882  * initialize rxon structure with default values from eeprom
3883  */
3884 void il_connection_init_rx_config(struct il_priv *il,
3885                                    struct il_rxon_context *ctx)
3886 {
3887         const struct il_channel_info *ch_info;
3888
3889         memset(&ctx->staging, 0, sizeof(ctx->staging));
3890
3891         if (!ctx->vif) {
3892                 ctx->staging.dev_type = ctx->unused_devtype;
3893         } else
3894         switch (ctx->vif->type) {
3895
3896         case NL80211_IFTYPE_STATION:
3897                 ctx->staging.dev_type = ctx->station_devtype;
3898                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3899                 break;
3900
3901         case NL80211_IFTYPE_ADHOC:
3902                 ctx->staging.dev_type = ctx->ibss_devtype;
3903                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3904                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
3905                                                   RXON_FILTER_ACCEPT_GRP_MSK;
3906                 break;
3907
3908         default:
3909                 IL_ERR("Unsupported interface type %d\n",
3910                         ctx->vif->type);
3911                 break;
3912         }
3913
3914 #if 0
3915         /* TODO:  Figure out when short_preamble would be set and cache from
3916          * that */
3917         if (!hw_to_local(il->hw)->short_preamble)
3918                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3919         else
3920                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3921 #endif
3922
3923         ch_info = il_get_channel_info(il, il->band,
3924                                        le16_to_cpu(ctx->active.channel));
3925
3926         if (!ch_info)
3927                 ch_info = &il->channel_info[0];
3928
3929         ctx->staging.channel = cpu_to_le16(ch_info->channel);
3930         il->band = ch_info->band;
3931
3932         il_set_flags_for_band(il, ctx, il->band, ctx->vif);
3933
3934         ctx->staging.ofdm_basic_rates =
3935             (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3936         ctx->staging.cck_basic_rates =
3937             (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3938
3939         /* clear both MIX and PURE40 mode flag */
3940         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
3941                                         RXON_FLG_CHANNEL_MODE_PURE_40);
3942         if (ctx->vif)
3943                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
3944
3945         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
3946         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
3947 }
3948 EXPORT_SYMBOL(il_connection_init_rx_config);
3949
3950 void il_set_rate(struct il_priv *il)
3951 {
3952         const struct ieee80211_supported_band *hw = NULL;
3953         struct ieee80211_rate *rate;
3954         int i;
3955
3956         hw = il_get_hw_mode(il, il->band);
3957         if (!hw) {
3958                 IL_ERR("Failed to set rate: unable to get hw mode\n");
3959                 return;
3960         }
3961
3962         il->active_rate = 0;
3963
3964         for (i = 0; i < hw->n_bitrates; i++) {
3965                 rate = &(hw->bitrates[i]);
3966                 if (rate->hw_value < RATE_COUNT_LEGACY)
3967                         il->active_rate |= (1 << rate->hw_value);
3968         }
3969
3970         D_RATE("Set active_rate = %0x\n", il->active_rate);
3971
3972         il->ctx.staging.cck_basic_rates =
3973                     (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3974
3975         il->ctx.staging.ofdm_basic_rates =
3976                    (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3977 }
3978 EXPORT_SYMBOL(il_set_rate);
3979
3980 void il_chswitch_done(struct il_priv *il, bool is_success)
3981 {
3982         struct il_rxon_context *ctx = &il->ctx;
3983
3984         if (test_bit(S_EXIT_PENDING, &il->status))
3985                 return;
3986
3987         if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
3988                 ieee80211_chswitch_done(ctx->vif, is_success);
3989 }
3990 EXPORT_SYMBOL(il_chswitch_done);
3991
3992 void il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
3993 {
3994         struct il_rx_pkt *pkt = rxb_addr(rxb);
3995         struct il_csa_notification *csa = &(pkt->u.csa_notif);
3996
3997         struct il_rxon_context *ctx = &il->ctx;
3998         struct il_rxon_cmd *rxon = (void *)&ctx->active;
3999
4000         if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4001                 return;
4002
4003         if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4004                 rxon->channel = csa->channel;
4005                 ctx->staging.channel = csa->channel;
4006                 D_11H("CSA notif: channel %d\n",
4007                               le16_to_cpu(csa->channel));
4008                 il_chswitch_done(il, true);
4009         } else {
4010                 IL_ERR("CSA notif (fail) : channel %d\n",
4011                         le16_to_cpu(csa->channel));
4012                 il_chswitch_done(il, false);
4013         }
4014 }
4015 EXPORT_SYMBOL(il_hdl_csa);
4016
4017 #ifdef CONFIG_IWLEGACY_DEBUG
4018 void il_print_rx_config_cmd(struct il_priv *il,
4019                              struct il_rxon_context *ctx)
4020 {
4021         struct il_rxon_cmd *rxon = &ctx->staging;
4022
4023         D_RADIO("RX CONFIG:\n");
4024         il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4025         D_RADIO("u16 channel: 0x%x\n",
4026                                 le16_to_cpu(rxon->channel));
4027         D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4028         D_RADIO("u32 filter_flags: 0x%08x\n",
4029                                 le32_to_cpu(rxon->filter_flags));
4030         D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4031         D_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4032                         rxon->ofdm_basic_rates);
4033         D_RADIO("u8 cck_basic_rates: 0x%02x\n",
4034                                 rxon->cck_basic_rates);
4035         D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4036         D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4037         D_RADIO("u16 assoc_id: 0x%x\n",
4038                                 le16_to_cpu(rxon->assoc_id));
4039 }
4040 EXPORT_SYMBOL(il_print_rx_config_cmd);
4041 #endif
4042 /**
4043  * il_irq_handle_error - called for HW or SW error interrupt from card
4044  */
4045 void il_irq_handle_error(struct il_priv *il)
4046 {
4047         /* Set the FW error flag -- cleared on il_down */
4048         set_bit(S_FW_ERROR, &il->status);
4049
4050         /* Cancel currently queued command. */
4051         clear_bit(S_HCMD_ACTIVE, &il->status);
4052
4053         IL_ERR("Loaded firmware version: %s\n",
4054                 il->hw->wiphy->fw_version);
4055
4056         il->cfg->ops->lib->dump_nic_error_log(il);
4057         if (il->cfg->ops->lib->dump_fh)
4058                 il->cfg->ops->lib->dump_fh(il, NULL, false);
4059 #ifdef CONFIG_IWLEGACY_DEBUG
4060         if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4061                 il_print_rx_config_cmd(il,
4062                                         &il->ctx);
4063 #endif
4064
4065         wake_up(&il->wait_command_queue);
4066
4067         /* Keep the restart process from trying to send host
4068          * commands by clearing the INIT status bit */
4069         clear_bit(S_READY, &il->status);
4070
4071         if (!test_bit(S_EXIT_PENDING, &il->status)) {
4072                 IL_DBG(IL_DL_FW_ERRORS,
4073                           "Restarting adapter due to uCode error.\n");
4074
4075                 if (il->cfg->mod_params->restart_fw)
4076                         queue_work(il->workqueue, &il->restart);
4077         }
4078 }
4079 EXPORT_SYMBOL(il_irq_handle_error);
4080
4081 static int il_apm_stop_master(struct il_priv *il)
4082 {
4083         int ret = 0;
4084
4085         /* stop device's busmaster DMA activity */
4086         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4087
4088         ret = _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4089                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4090         if (ret)
4091                 IL_WARN("Master Disable Timed Out, 100 usec\n");
4092
4093         D_INFO("stop master\n");
4094
4095         return ret;
4096 }
4097
4098 void il_apm_stop(struct il_priv *il)
4099 {
4100         D_INFO("Stop card, put in low power state\n");
4101
4102         /* Stop device's DMA activity */
4103         il_apm_stop_master(il);
4104
4105         /* Reset the entire device */
4106         il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4107
4108         udelay(10);
4109
4110         /*
4111          * Clear "initialization complete" bit to move adapter from
4112          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4113          */
4114         il_clear_bit(il, CSR_GP_CNTRL,
4115                                 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4116 }
4117 EXPORT_SYMBOL(il_apm_stop);
4118
4119
4120 /*
4121  * Start up NIC's basic functionality after it has been reset
4122  * (e.g. after platform boot, or shutdown via il_apm_stop())
4123  * NOTE:  This does not load uCode nor start the embedded processor
4124  */
4125 int il_apm_init(struct il_priv *il)
4126 {
4127         int ret = 0;
4128         u16 lctl;
4129
4130         D_INFO("Init card's basic functions\n");
4131
4132         /*
4133          * Use "set_bit" below rather than "write", to preserve any hardware
4134          * bits already set by default after reset.
4135          */
4136
4137         /* Disable L0S exit timer (platform NMI Work/Around) */
4138         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4139                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4140
4141         /*
4142          * Disable L0s without affecting L1;
4143          *  don't wait for ICH L0s (ICH bug W/A)
4144          */
4145         il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4146                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4147
4148         /* Set FH wait threshold to maximum (HW error during stress W/A) */
4149         il_set_bit(il, CSR_DBG_HPET_MEM_REG,
4150                                         CSR_DBG_HPET_MEM_REG_VAL);
4151
4152         /*
4153          * Enable HAP INTA (interrupt from management bus) to
4154          * wake device's PCI Express link L1a -> L0s
4155          * NOTE:  This is no-op for 3945 (non-existent bit)
4156          */
4157         il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4158                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4159
4160         /*
4161          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4162          * Check if BIOS (or OS) enabled L1-ASPM on this device.
4163          * If so (likely), disable L0S, so device moves directly L0->L1;
4164          *    costs negligible amount of power savings.
4165          * If not (unlikely), enable L0S, so there is at least some
4166          *    power savings, even without L1.
4167          */
4168         if (il->cfg->base_params->set_l0s) {
4169                 lctl = il_pcie_link_ctl(il);
4170                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4171                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4172                         /* L1-ASPM enabled; disable(!) L0S  */
4173                         il_set_bit(il, CSR_GIO_REG,
4174                                         CSR_GIO_REG_VAL_L0S_ENABLED);
4175                         D_POWER("L1 Enabled; Disabling L0S\n");
4176                 } else {
4177                         /* L1-ASPM disabled; enable(!) L0S */
4178                         il_clear_bit(il, CSR_GIO_REG,
4179                                         CSR_GIO_REG_VAL_L0S_ENABLED);
4180                         D_POWER("L1 Disabled; Enabling L0S\n");
4181                 }
4182         }
4183
4184         /* Configure analog phase-lock-loop before activating to D0A */
4185         if (il->cfg->base_params->pll_cfg_val)
4186                 il_set_bit(il, CSR_ANA_PLL_CFG,
4187                             il->cfg->base_params->pll_cfg_val);
4188
4189         /*
4190          * Set "initialization complete" bit to move adapter from
4191          * D0U* --> D0A* (powered-up active) state.
4192          */
4193         il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4194
4195         /*
4196          * Wait for clock stabilization; once stabilized, access to
4197          * device-internal resources is supported, e.g. il_wr_prph()
4198          * and accesses to uCode SRAM.
4199          */
4200         ret = _il_poll_bit(il, CSR_GP_CNTRL,
4201                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4202                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4203         if (ret < 0) {
4204                 D_INFO("Failed to init the card\n");
4205                 goto out;
4206         }
4207
4208         /*
4209          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4210          * BSM (Boostrap State Machine) is only in 3945 and 4965.
4211          *
4212          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4213          * do not disable clocks.  This preserves any hardware bits already
4214          * set by default in "CLK_CTRL_REG" after reset.
4215          */
4216         if (il->cfg->base_params->use_bsm)
4217                 il_wr_prph(il, APMG_CLK_EN_REG,
4218                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4219         else
4220                 il_wr_prph(il, APMG_CLK_EN_REG,
4221                         APMG_CLK_VAL_DMA_CLK_RQT);
4222         udelay(20);
4223
4224         /* Disable L1-Active */
4225         il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4226                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4227
4228 out:
4229         return ret;
4230 }
4231 EXPORT_SYMBOL(il_apm_init);
4232
4233
4234 int il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4235 {
4236         int ret;
4237         s8 prev_tx_power;
4238         bool defer;
4239         struct il_rxon_context *ctx = &il->ctx;
4240
4241         lockdep_assert_held(&il->mutex);
4242
4243         if (il->tx_power_user_lmt == tx_power && !force)
4244                 return 0;
4245
4246         if (!il->cfg->ops->lib->send_tx_power)
4247                 return -EOPNOTSUPP;
4248
4249         /* 0 dBm mean 1 milliwatt */
4250         if (tx_power < 0) {
4251                 IL_WARN(
4252                          "Requested user TXPOWER %d below 1 mW.\n",
4253                          tx_power);
4254                 return -EINVAL;
4255         }
4256
4257         if (tx_power > il->tx_power_device_lmt) {
4258                 IL_WARN(
4259                         "Requested user TXPOWER %d above upper limit %d.\n",
4260                          tx_power, il->tx_power_device_lmt);
4261                 return -EINVAL;
4262         }
4263
4264         if (!il_is_ready_rf(il))
4265                 return -EIO;
4266
4267         /* scan complete and commit_rxon use tx_power_next value,
4268          * it always need to be updated for newest request */
4269         il->tx_power_next = tx_power;
4270
4271         /* do not set tx power when scanning or channel changing */
4272         defer = test_bit(S_SCANNING, &il->status) ||
4273                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
4274         if (defer && !force) {
4275                 D_INFO("Deferring tx power set\n");
4276                 return 0;
4277         }
4278
4279         prev_tx_power = il->tx_power_user_lmt;
4280         il->tx_power_user_lmt = tx_power;
4281
4282         ret = il->cfg->ops->lib->send_tx_power(il);
4283
4284         /* if fail to set tx_power, restore the orig. tx power */
4285         if (ret) {
4286                 il->tx_power_user_lmt = prev_tx_power;
4287                 il->tx_power_next = prev_tx_power;
4288         }
4289         return ret;
4290 }
4291 EXPORT_SYMBOL(il_set_tx_power);
4292
4293 void il_send_bt_config(struct il_priv *il)
4294 {
4295         struct il_bt_cmd bt_cmd = {
4296                 .lead_time = BT_LEAD_TIME_DEF,
4297                 .max_kill = BT_MAX_KILL_DEF,
4298                 .kill_ack_mask = 0,
4299                 .kill_cts_mask = 0,
4300         };
4301
4302         if (!bt_coex_active)
4303                 bt_cmd.flags = BT_COEX_DISABLE;
4304         else
4305                 bt_cmd.flags = BT_COEX_ENABLE;
4306
4307         D_INFO("BT coex %s\n",
4308                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4309
4310         if (il_send_cmd_pdu(il, C_BT_CONFIG,
4311                              sizeof(struct il_bt_cmd), &bt_cmd))
4312                 IL_ERR("failed to send BT Coex Config\n");
4313 }
4314 EXPORT_SYMBOL(il_send_bt_config);
4315
4316 int il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4317 {
4318         struct il_stats_cmd stats_cmd = {
4319                 .configuration_flags =
4320                         clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4321         };
4322
4323         if (flags & CMD_ASYNC)
4324                 return il_send_cmd_pdu_async(il, C_STATS,
4325                                         sizeof(struct il_stats_cmd),
4326                                         &stats_cmd, NULL);
4327         else
4328                 return il_send_cmd_pdu(il, C_STATS,
4329                                         sizeof(struct il_stats_cmd),
4330                                         &stats_cmd);
4331 }
4332 EXPORT_SYMBOL(il_send_stats_request);
4333
4334 void il_hdl_pm_sleep(struct il_priv *il,
4335                            struct il_rx_buf *rxb)
4336 {
4337 #ifdef CONFIG_IWLEGACY_DEBUG
4338         struct il_rx_pkt *pkt = rxb_addr(rxb);
4339         struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4340         D_RX("sleep mode: %d, src: %d\n",
4341                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4342 #endif
4343 }
4344 EXPORT_SYMBOL(il_hdl_pm_sleep);
4345
4346 void il_hdl_pm_debug_stats(struct il_priv *il,
4347                                       struct il_rx_buf *rxb)
4348 {
4349         struct il_rx_pkt *pkt = rxb_addr(rxb);
4350         u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4351         D_RADIO("Dumping %d bytes of unhandled "
4352                         "notification for %s:\n", len,
4353                         il_get_cmd_string(pkt->hdr.cmd));
4354         il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4355 }
4356 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4357
4358 void il_hdl_error(struct il_priv *il,
4359                         struct il_rx_buf *rxb)
4360 {
4361         struct il_rx_pkt *pkt = rxb_addr(rxb);
4362
4363         IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4364                 "seq 0x%04X ser 0x%08X\n",
4365                 le32_to_cpu(pkt->u.err_resp.error_type),
4366                 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4367                 pkt->u.err_resp.cmd_id,
4368                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4369                 le32_to_cpu(pkt->u.err_resp.error_info));
4370 }
4371 EXPORT_SYMBOL(il_hdl_error);
4372
4373 void il_clear_isr_stats(struct il_priv *il)
4374 {
4375         memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4376 }
4377
4378 int il_mac_conf_tx(struct ieee80211_hw *hw,
4379                            struct ieee80211_vif *vif, u16 queue,
4380                            const struct ieee80211_tx_queue_params *params)
4381 {
4382         struct il_priv *il = hw->priv;
4383         unsigned long flags;
4384         int q;
4385
4386         D_MAC80211("enter\n");
4387
4388         if (!il_is_ready_rf(il)) {
4389                 D_MAC80211("leave - RF not ready\n");
4390                 return -EIO;
4391         }
4392
4393         if (queue >= AC_NUM) {
4394                 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4395                 return 0;
4396         }
4397
4398         q = AC_NUM - 1 - queue;
4399
4400         spin_lock_irqsave(&il->lock, flags);
4401
4402         il->ctx.qos_data.def_qos_parm.ac[q].cw_min =
4403                         cpu_to_le16(params->cw_min);
4404         il->ctx.qos_data.def_qos_parm.ac[q].cw_max =
4405                         cpu_to_le16(params->cw_max);
4406         il->ctx.qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4407         il->ctx.qos_data.def_qos_parm.ac[q].edca_txop =
4408                                 cpu_to_le16((params->txop * 32));
4409
4410         il->ctx.qos_data.def_qos_parm.ac[q].reserved1 = 0;
4411
4412         spin_unlock_irqrestore(&il->lock, flags);
4413
4414         D_MAC80211("leave\n");
4415         return 0;
4416 }
4417 EXPORT_SYMBOL(il_mac_conf_tx);
4418
4419 int il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4420 {
4421         struct il_priv *il = hw->priv;
4422
4423         return il->ibss_manager == IL_IBSS_MANAGER;
4424 }
4425 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4426
4427 static int
4428 il_set_mode(struct il_priv *il, struct il_rxon_context *ctx)
4429 {
4430         il_connection_init_rx_config(il, ctx);
4431
4432         if (il->cfg->ops->hcmd->set_rxon_chain)
4433                 il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
4434
4435         return il_commit_rxon(il, ctx);
4436 }
4437
4438 static int il_setup_interface(struct il_priv *il,
4439                                struct il_rxon_context *ctx)
4440 {
4441         struct ieee80211_vif *vif = ctx->vif;
4442         int err;
4443
4444         lockdep_assert_held(&il->mutex);
4445
4446         /*
4447          * This variable will be correct only when there's just
4448          * a single context, but all code using it is for hardware
4449          * that supports only one context.
4450          */
4451         il->iw_mode = vif->type;
4452
4453         ctx->is_active = true;
4454
4455         err = il_set_mode(il, ctx);
4456         if (err) {
4457                 if (!ctx->always_active)
4458                         ctx->is_active = false;
4459                 return err;
4460         }
4461
4462         return 0;
4463 }
4464
4465 int
4466 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4467 {
4468         struct il_priv *il = hw->priv;
4469         struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
4470         int err;
4471         u32 modes;
4472
4473         D_MAC80211("enter: type %d, addr %pM\n",
4474                            vif->type, vif->addr);
4475
4476         mutex_lock(&il->mutex);
4477
4478         if (!il_is_ready_rf(il)) {
4479                 IL_WARN("Try to add interface when device not ready\n");
4480                 err = -EINVAL;
4481                 goto out;
4482         }
4483
4484
4485         /* check if busy context is exclusive */
4486         if (il->ctx.vif &&
4487             (il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type))) {
4488                 err = -EINVAL;
4489                 goto out;
4490         }
4491
4492         modes = il->ctx.interface_modes | il->ctx.exclusive_interface_modes;
4493         if (!(modes & BIT(vif->type))) {
4494                 err = -EOPNOTSUPP;
4495                 goto out;
4496         }
4497
4498         vif_priv->ctx = &il->ctx;
4499         il->ctx.vif = vif;
4500
4501         err = il_setup_interface(il, &il->ctx);
4502         if (err) {
4503                 il->ctx.vif = NULL;
4504                 il->iw_mode = NL80211_IFTYPE_STATION;
4505         }
4506
4507  out:
4508         mutex_unlock(&il->mutex);
4509
4510         D_MAC80211("leave\n");
4511         return err;
4512 }
4513 EXPORT_SYMBOL(il_mac_add_interface);
4514
4515 static void il_teardown_interface(struct il_priv *il,
4516                                    struct ieee80211_vif *vif,
4517                                    bool mode_change)
4518 {
4519         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4520
4521         lockdep_assert_held(&il->mutex);
4522
4523         if (il->scan_vif == vif) {
4524                 il_scan_cancel_timeout(il, 200);
4525                 il_force_scan_end(il);
4526         }
4527
4528         if (!mode_change) {
4529                 il_set_mode(il, ctx);
4530                 if (!ctx->always_active)
4531                         ctx->is_active = false;
4532         }
4533 }
4534
4535 void il_mac_remove_interface(struct ieee80211_hw *hw,
4536                               struct ieee80211_vif *vif)
4537 {
4538         struct il_priv *il = hw->priv;
4539         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4540
4541         D_MAC80211("enter\n");
4542
4543         mutex_lock(&il->mutex);
4544
4545         WARN_ON(ctx->vif != vif);
4546         ctx->vif = NULL;
4547
4548         il_teardown_interface(il, vif, false);
4549
4550         memset(il->bssid, 0, ETH_ALEN);
4551         mutex_unlock(&il->mutex);
4552
4553         D_MAC80211("leave\n");
4554
4555 }
4556 EXPORT_SYMBOL(il_mac_remove_interface);
4557
4558 int il_alloc_txq_mem(struct il_priv *il)
4559 {
4560         if (!il->txq)
4561                 il->txq = kzalloc(
4562                         sizeof(struct il_tx_queue) *
4563                                 il->cfg->base_params->num_of_queues,
4564                         GFP_KERNEL);
4565         if (!il->txq) {
4566                 IL_ERR("Not enough memory for txq\n");
4567                 return -ENOMEM;
4568         }
4569         return 0;
4570 }
4571 EXPORT_SYMBOL(il_alloc_txq_mem);
4572
4573 void il_txq_mem(struct il_priv *il)
4574 {
4575         kfree(il->txq);
4576         il->txq = NULL;
4577 }
4578 EXPORT_SYMBOL(il_txq_mem);
4579
4580 #ifdef CONFIG_IWLEGACY_DEBUGFS
4581
4582 #define IL_TRAFFIC_DUMP_SIZE    (IL_TRAFFIC_ENTRY_SIZE * IL_TRAFFIC_ENTRIES)
4583
4584 void il_reset_traffic_log(struct il_priv *il)
4585 {
4586         il->tx_traffic_idx = 0;
4587         il->rx_traffic_idx = 0;
4588         if (il->tx_traffic)
4589                 memset(il->tx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4590         if (il->rx_traffic)
4591                 memset(il->rx_traffic, 0, IL_TRAFFIC_DUMP_SIZE);
4592 }
4593
4594 int il_alloc_traffic_mem(struct il_priv *il)
4595 {
4596         u32 traffic_size = IL_TRAFFIC_DUMP_SIZE;
4597
4598         if (il_debug_level & IL_DL_TX) {
4599                 if (!il->tx_traffic) {
4600                         il->tx_traffic =
4601                                 kzalloc(traffic_size, GFP_KERNEL);
4602                         if (!il->tx_traffic)
4603                                 return -ENOMEM;
4604                 }
4605         }
4606         if (il_debug_level & IL_DL_RX) {
4607                 if (!il->rx_traffic) {
4608                         il->rx_traffic =
4609                                 kzalloc(traffic_size, GFP_KERNEL);
4610                         if (!il->rx_traffic)
4611                                 return -ENOMEM;
4612                 }
4613         }
4614         il_reset_traffic_log(il);
4615         return 0;
4616 }
4617 EXPORT_SYMBOL(il_alloc_traffic_mem);
4618
4619 void il_free_traffic_mem(struct il_priv *il)
4620 {
4621         kfree(il->tx_traffic);
4622         il->tx_traffic = NULL;
4623
4624         kfree(il->rx_traffic);
4625         il->rx_traffic = NULL;
4626 }
4627 EXPORT_SYMBOL(il_free_traffic_mem);
4628
4629 void il_dbg_log_tx_data_frame(struct il_priv *il,
4630                       u16 length, struct ieee80211_hdr *header)
4631 {
4632         __le16 fc;
4633         u16 len;
4634
4635         if (likely(!(il_debug_level & IL_DL_TX)))
4636                 return;
4637
4638         if (!il->tx_traffic)
4639                 return;
4640
4641         fc = header->frame_control;
4642         if (ieee80211_is_data(fc)) {
4643                 len = (length > IL_TRAFFIC_ENTRY_SIZE)
4644                        ? IL_TRAFFIC_ENTRY_SIZE : length;
4645                 memcpy((il->tx_traffic +
4646                        (il->tx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)),
4647                        header, len);
4648                 il->tx_traffic_idx =
4649                         (il->tx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4650         }
4651 }
4652 EXPORT_SYMBOL(il_dbg_log_tx_data_frame);
4653
4654 void il_dbg_log_rx_data_frame(struct il_priv *il,
4655                       u16 length, struct ieee80211_hdr *header)
4656 {
4657         __le16 fc;
4658         u16 len;
4659
4660         if (likely(!(il_debug_level & IL_DL_RX)))
4661                 return;
4662
4663         if (!il->rx_traffic)
4664                 return;
4665
4666         fc = header->frame_control;
4667         if (ieee80211_is_data(fc)) {
4668                 len = (length > IL_TRAFFIC_ENTRY_SIZE)
4669                        ? IL_TRAFFIC_ENTRY_SIZE : length;
4670                 memcpy((il->rx_traffic +
4671                        (il->rx_traffic_idx * IL_TRAFFIC_ENTRY_SIZE)),
4672                        header, len);
4673                 il->rx_traffic_idx =
4674                         (il->rx_traffic_idx + 1) % IL_TRAFFIC_ENTRIES;
4675         }
4676 }
4677 EXPORT_SYMBOL(il_dbg_log_rx_data_frame);
4678
4679 const char *il_get_mgmt_string(int cmd)
4680 {
4681         switch (cmd) {
4682                 IL_CMD(MANAGEMENT_ASSOC_REQ);
4683                 IL_CMD(MANAGEMENT_ASSOC_RESP);
4684                 IL_CMD(MANAGEMENT_REASSOC_REQ);
4685                 IL_CMD(MANAGEMENT_REASSOC_RESP);
4686                 IL_CMD(MANAGEMENT_PROBE_REQ);
4687                 IL_CMD(MANAGEMENT_PROBE_RESP);
4688                 IL_CMD(MANAGEMENT_BEACON);
4689                 IL_CMD(MANAGEMENT_ATIM);
4690                 IL_CMD(MANAGEMENT_DISASSOC);
4691                 IL_CMD(MANAGEMENT_AUTH);
4692                 IL_CMD(MANAGEMENT_DEAUTH);
4693                 IL_CMD(MANAGEMENT_ACTION);
4694         default:
4695                 return "UNKNOWN";
4696
4697         }
4698 }
4699
4700 const char *il_get_ctrl_string(int cmd)
4701 {
4702         switch (cmd) {
4703                 IL_CMD(CONTROL_BACK_REQ);
4704                 IL_CMD(CONTROL_BACK);
4705                 IL_CMD(CONTROL_PSPOLL);
4706                 IL_CMD(CONTROL_RTS);
4707                 IL_CMD(CONTROL_CTS);
4708                 IL_CMD(CONTROL_ACK);
4709                 IL_CMD(CONTROL_CFEND);
4710                 IL_CMD(CONTROL_CFENDACK);
4711         default:
4712                 return "UNKNOWN";
4713
4714         }
4715 }
4716
4717 void il_clear_traffic_stats(struct il_priv *il)
4718 {
4719         memset(&il->tx_stats, 0, sizeof(struct traffic_stats));
4720         memset(&il->rx_stats, 0, sizeof(struct traffic_stats));
4721 }
4722
4723 /*
4724  * if CONFIG_IWLEGACY_DEBUGFS defined,
4725  * il_update_stats function will
4726  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
4727  * Use debugFs to display the rx/rx_stats
4728  * if CONFIG_IWLEGACY_DEBUGFS not being defined, then no MGMT and CTRL
4729  * information will be recorded, but DATA pkt still will be recorded
4730  * for the reason of il_led.c need to control the led blinking based on
4731  * number of tx and rx data.
4732  *
4733  */
4734 void
4735 il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
4736 {
4737         struct traffic_stats    *stats;
4738
4739         if (is_tx)
4740                 stats = &il->tx_stats;
4741         else
4742                 stats = &il->rx_stats;
4743
4744         if (ieee80211_is_mgmt(fc)) {
4745                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4746                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
4747                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
4748                         break;
4749                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
4750                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
4751                         break;
4752                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
4753                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
4754                         break;
4755                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
4756                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
4757                         break;
4758                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
4759                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
4760                         break;
4761                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
4762                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
4763                         break;
4764                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
4765                         stats->mgmt[MANAGEMENT_BEACON]++;
4766                         break;
4767                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
4768                         stats->mgmt[MANAGEMENT_ATIM]++;
4769                         break;
4770                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
4771                         stats->mgmt[MANAGEMENT_DISASSOC]++;
4772                         break;
4773                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
4774                         stats->mgmt[MANAGEMENT_AUTH]++;
4775                         break;
4776                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
4777                         stats->mgmt[MANAGEMENT_DEAUTH]++;
4778                         break;
4779                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
4780                         stats->mgmt[MANAGEMENT_ACTION]++;
4781                         break;
4782                 }
4783         } else if (ieee80211_is_ctl(fc)) {
4784                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
4785                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
4786                         stats->ctrl[CONTROL_BACK_REQ]++;
4787                         break;
4788                 case cpu_to_le16(IEEE80211_STYPE_BACK):
4789                         stats->ctrl[CONTROL_BACK]++;
4790                         break;
4791                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
4792                         stats->ctrl[CONTROL_PSPOLL]++;
4793                         break;
4794                 case cpu_to_le16(IEEE80211_STYPE_RTS):
4795                         stats->ctrl[CONTROL_RTS]++;
4796                         break;
4797                 case cpu_to_le16(IEEE80211_STYPE_CTS):
4798                         stats->ctrl[CONTROL_CTS]++;
4799                         break;
4800                 case cpu_to_le16(IEEE80211_STYPE_ACK):
4801                         stats->ctrl[CONTROL_ACK]++;
4802                         break;
4803                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
4804                         stats->ctrl[CONTROL_CFEND]++;
4805                         break;
4806                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
4807                         stats->ctrl[CONTROL_CFENDACK]++;
4808                         break;
4809                 }
4810         } else {
4811                 /* data */
4812                 stats->data_cnt++;
4813                 stats->data_bytes += len;
4814         }
4815 }
4816 EXPORT_SYMBOL(il_update_stats);
4817 #endif
4818
4819 int il_force_reset(struct il_priv *il, bool external)
4820 {
4821         struct il_force_reset *force_reset;
4822
4823         if (test_bit(S_EXIT_PENDING, &il->status))
4824                 return -EINVAL;
4825
4826         force_reset = &il->force_reset;
4827         force_reset->reset_request_count++;
4828         if (!external) {
4829                 if (force_reset->last_force_reset_jiffies &&
4830                     time_after(force_reset->last_force_reset_jiffies +
4831                     force_reset->reset_duration, jiffies)) {
4832                         D_INFO("force reset rejected\n");
4833                         force_reset->reset_reject_count++;
4834                         return -EAGAIN;
4835                 }
4836         }
4837         force_reset->reset_success_count++;
4838         force_reset->last_force_reset_jiffies = jiffies;
4839
4840         /*
4841          * if the request is from external(ex: debugfs),
4842          * then always perform the request in regardless the module
4843          * parameter setting
4844          * if the request is from internal (uCode error or driver
4845          * detect failure), then fw_restart module parameter
4846          * need to be check before performing firmware reload
4847          */
4848
4849         if (!external && !il->cfg->mod_params->restart_fw) {
4850                 D_INFO("Cancel firmware reload based on "
4851                                "module parameter setting\n");
4852                 return 0;
4853         }
4854
4855         IL_ERR("On demand firmware reload\n");
4856
4857         /* Set the FW error flag -- cleared on il_down */
4858         set_bit(S_FW_ERROR, &il->status);
4859         wake_up(&il->wait_command_queue);
4860         /*
4861          * Keep the restart process from trying to send host
4862          * commands by clearing the INIT status bit
4863          */
4864         clear_bit(S_READY, &il->status);
4865         queue_work(il->workqueue, &il->restart);
4866
4867         return 0;
4868 }
4869
4870 int
4871 il_mac_change_interface(struct ieee80211_hw *hw,
4872                         struct ieee80211_vif *vif,
4873                         enum nl80211_iftype newtype, bool newp2p)
4874 {
4875         struct il_priv *il = hw->priv;
4876         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
4877         u32 modes;
4878         int err;
4879
4880         newtype = ieee80211_iftype_p2p(newtype, newp2p);
4881
4882         mutex_lock(&il->mutex);
4883
4884         if (!ctx->vif || !il_is_ready_rf(il)) {
4885                 /*
4886                  * Huh? But wait ... this can maybe happen when
4887                  * we're in the middle of a firmware restart!
4888                  */
4889                 err = -EBUSY;
4890                 goto out;
4891         }
4892
4893         modes = ctx->interface_modes | ctx->exclusive_interface_modes;
4894         if (!(modes & BIT(newtype))) {
4895                 err = -EOPNOTSUPP;
4896                 goto out;
4897         }
4898
4899         if ((il->ctx.exclusive_interface_modes & BIT(il->ctx.vif->type)) ||
4900             (il->ctx.exclusive_interface_modes & BIT(newtype))) {
4901                 err = -EINVAL;
4902                 goto out;
4903         }
4904
4905         /* success */
4906         il_teardown_interface(il, vif, true);
4907         vif->type = newtype;
4908         vif->p2p = newp2p;
4909         err = il_setup_interface(il, ctx);
4910         WARN_ON(err);
4911         /*
4912          * We've switched internally, but submitting to the
4913          * device may have failed for some reason. Mask this
4914          * error, because otherwise mac80211 will not switch
4915          * (and set the interface type back) and we'll be
4916          * out of sync with it.
4917          */
4918         err = 0;
4919
4920  out:
4921         mutex_unlock(&il->mutex);
4922         return err;
4923 }
4924 EXPORT_SYMBOL(il_mac_change_interface);
4925
4926 /*
4927  * On every watchdog tick we check (latest) time stamp. If it does not
4928  * change during timeout period and queue is not empty we reset firmware.
4929  */
4930 static int il_check_stuck_queue(struct il_priv *il, int cnt)
4931 {
4932         struct il_tx_queue *txq = &il->txq[cnt];
4933         struct il_queue *q = &txq->q;
4934         unsigned long timeout;
4935         int ret;
4936
4937         if (q->read_ptr == q->write_ptr) {
4938                 txq->time_stamp = jiffies;
4939                 return 0;
4940         }
4941
4942         timeout = txq->time_stamp +
4943                   msecs_to_jiffies(il->cfg->base_params->wd_timeout);
4944
4945         if (time_after(jiffies, timeout)) {
4946                 IL_ERR("Queue %d stuck for %u ms.\n",
4947                                 q->id, il->cfg->base_params->wd_timeout);
4948                 ret = il_force_reset(il, false);
4949                 return (ret == -EAGAIN) ? 0 : 1;
4950         }
4951
4952         return 0;
4953 }
4954
4955 /*
4956  * Making watchdog tick be a quarter of timeout assure we will
4957  * discover the queue hung between timeout and 1.25*timeout
4958  */
4959 #define IL_WD_TICK(timeout) ((timeout) / 4)
4960
4961 /*
4962  * Watchdog timer callback, we check each tx queue for stuck, if if hung
4963  * we reset the firmware. If everything is fine just rearm the timer.
4964  */
4965 void il_bg_watchdog(unsigned long data)
4966 {
4967         struct il_priv *il = (struct il_priv *)data;
4968         int cnt;
4969         unsigned long timeout;
4970
4971         if (test_bit(S_EXIT_PENDING, &il->status))
4972                 return;
4973
4974         timeout = il->cfg->base_params->wd_timeout;
4975         if (timeout == 0)
4976                 return;
4977
4978         /* monitor and check for stuck cmd queue */
4979         if (il_check_stuck_queue(il, il->cmd_queue))
4980                 return;
4981
4982         /* monitor and check for other stuck queues */
4983         if (il_is_any_associated(il)) {
4984                 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4985                         /* skip as we already checked the command queue */
4986                         if (cnt == il->cmd_queue)
4987                                 continue;
4988                         if (il_check_stuck_queue(il, cnt))
4989                                 return;
4990                 }
4991         }
4992
4993         mod_timer(&il->watchdog, jiffies +
4994                   msecs_to_jiffies(IL_WD_TICK(timeout)));
4995 }
4996 EXPORT_SYMBOL(il_bg_watchdog);
4997
4998 void il_setup_watchdog(struct il_priv *il)
4999 {
5000         unsigned int timeout = il->cfg->base_params->wd_timeout;
5001
5002         if (timeout)
5003                 mod_timer(&il->watchdog,
5004                           jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
5005         else
5006                 del_timer(&il->watchdog);
5007 }
5008 EXPORT_SYMBOL(il_setup_watchdog);
5009
5010 /*
5011  * extended beacon time format
5012  * time in usec will be changed into a 32-bit value in extended:internal format
5013  * the extended part is the beacon counts
5014  * the internal part is the time in usec within one beacon interval
5015  */
5016 u32
5017 il_usecs_to_beacons(struct il_priv *il,
5018                                         u32 usec, u32 beacon_interval)
5019 {
5020         u32 quot;
5021         u32 rem;
5022         u32 interval = beacon_interval * TIME_UNIT;
5023
5024         if (!interval || !usec)
5025                 return 0;
5026
5027         quot = (usec / interval) &
5028                 (il_beacon_time_mask_high(il,
5029                 il->hw_params.beacon_time_tsf_bits) >>
5030                 il->hw_params.beacon_time_tsf_bits);
5031         rem = (usec % interval) & il_beacon_time_mask_low(il,
5032                                    il->hw_params.beacon_time_tsf_bits);
5033
5034         return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
5035 }
5036 EXPORT_SYMBOL(il_usecs_to_beacons);
5037
5038 /* base is usually what we get from ucode with each received frame,
5039  * the same as HW timer counter counting down
5040  */
5041 __le32 il_add_beacon_time(struct il_priv *il, u32 base,
5042                            u32 addon, u32 beacon_interval)
5043 {
5044         u32 base_low = base & il_beacon_time_mask_low(il,
5045                                         il->hw_params.beacon_time_tsf_bits);
5046         u32 addon_low = addon & il_beacon_time_mask_low(il,
5047                                         il->hw_params.beacon_time_tsf_bits);
5048         u32 interval = beacon_interval * TIME_UNIT;
5049         u32 res = (base & il_beacon_time_mask_high(il,
5050                                 il->hw_params.beacon_time_tsf_bits)) +
5051                                 (addon & il_beacon_time_mask_high(il,
5052                                 il->hw_params.beacon_time_tsf_bits));
5053
5054         if (base_low > addon_low)
5055                 res += base_low - addon_low;
5056         else if (base_low < addon_low) {
5057                 res += interval + base_low - addon_low;
5058                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5059         } else
5060                 res += (1 << il->hw_params.beacon_time_tsf_bits);
5061
5062         return cpu_to_le32(res);
5063 }
5064 EXPORT_SYMBOL(il_add_beacon_time);
5065
5066 #ifdef CONFIG_PM
5067
5068 int il_pci_suspend(struct device *device)
5069 {
5070         struct pci_dev *pdev = to_pci_dev(device);
5071         struct il_priv *il = pci_get_drvdata(pdev);
5072
5073         /*
5074          * This function is called when system goes into suspend state
5075          * mac80211 will call il_mac_stop() from the mac80211 suspend function
5076          * first but since il_mac_stop() has no knowledge of who the caller is,
5077          * it will not call apm_ops.stop() to stop the DMA operation.
5078          * Calling apm_ops.stop here to make sure we stop the DMA.
5079          */
5080         il_apm_stop(il);
5081
5082         return 0;
5083 }
5084 EXPORT_SYMBOL(il_pci_suspend);
5085
5086 int il_pci_resume(struct device *device)
5087 {
5088         struct pci_dev *pdev = to_pci_dev(device);
5089         struct il_priv *il = pci_get_drvdata(pdev);
5090         bool hw_rfkill = false;
5091
5092         /*
5093          * We disable the RETRY_TIMEOUT register (0x41) to keep
5094          * PCI Tx retries from interfering with C3 CPU state.
5095          */
5096         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
5097
5098         il_enable_interrupts(il);
5099
5100         if (!(_il_rd(il, CSR_GP_CNTRL) &
5101                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5102                 hw_rfkill = true;
5103
5104         if (hw_rfkill)
5105                 set_bit(S_RF_KILL_HW, &il->status);
5106         else
5107                 clear_bit(S_RF_KILL_HW, &il->status);
5108
5109         wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
5110
5111         return 0;
5112 }
5113 EXPORT_SYMBOL(il_pci_resume);
5114
5115 const struct dev_pm_ops il_pm_ops = {
5116         .suspend = il_pci_suspend,
5117         .resume = il_pci_resume,
5118         .freeze = il_pci_suspend,
5119         .thaw = il_pci_resume,
5120         .poweroff = il_pci_suspend,
5121         .restore = il_pci_resume,
5122 };
5123 EXPORT_SYMBOL(il_pm_ops);
5124
5125 #endif /* CONFIG_PM */
5126
5127 static void
5128 il_update_qos(struct il_priv *il, struct il_rxon_context *ctx)
5129 {
5130         if (test_bit(S_EXIT_PENDING, &il->status))
5131                 return;
5132
5133         if (!ctx->is_active)
5134                 return;
5135
5136         ctx->qos_data.def_qos_parm.qos_flags = 0;
5137
5138         if (ctx->qos_data.qos_active)
5139                 ctx->qos_data.def_qos_parm.qos_flags |=
5140                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5141
5142         if (ctx->ht.enabled)
5143                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5144
5145         D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5146                       ctx->qos_data.qos_active,
5147                       ctx->qos_data.def_qos_parm.qos_flags);
5148
5149         il_send_cmd_pdu_async(il, ctx->qos_cmd,
5150                                sizeof(struct il_qosparam_cmd),
5151                                &ctx->qos_data.def_qos_parm, NULL);
5152 }
5153
5154 /**
5155  * il_mac_config - mac80211 config callback
5156  */
5157 int il_mac_config(struct ieee80211_hw *hw, u32 changed)
5158 {
5159         struct il_priv *il = hw->priv;
5160         const struct il_channel_info *ch_info;
5161         struct ieee80211_conf *conf = &hw->conf;
5162         struct ieee80211_channel *channel = conf->channel;
5163         struct il_ht_config *ht_conf = &il->current_ht_config;
5164         struct il_rxon_context *ctx = &il->ctx;
5165         unsigned long flags = 0;
5166         int ret = 0;
5167         u16 ch;
5168         int scan_active = 0;
5169         bool ht_changed = false;
5170
5171         if (WARN_ON(!il->cfg->ops->legacy))
5172                 return -EOPNOTSUPP;
5173
5174         mutex_lock(&il->mutex);
5175
5176         D_MAC80211("enter to channel %d changed 0x%X\n",
5177                                         channel->hw_value, changed);
5178
5179         if (unlikely(test_bit(S_SCANNING, &il->status))) {
5180                 scan_active = 1;
5181                 D_MAC80211("scan active\n");
5182         }
5183
5184         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
5185                        IEEE80211_CONF_CHANGE_CHANNEL)) {
5186                 /* mac80211 uses static for non-HT which is what we want */
5187                 il->current_ht_config.smps = conf->smps_mode;
5188
5189                 /*
5190                  * Recalculate chain counts.
5191                  *
5192                  * If monitor mode is enabled then mac80211 will
5193                  * set up the SM PS mode to OFF if an HT channel is
5194                  * configured.
5195                  */
5196                 if (il->cfg->ops->hcmd->set_rxon_chain)
5197                         il->cfg->ops->hcmd->set_rxon_chain(il, &il->ctx);
5198         }
5199
5200         /* during scanning mac80211 will delay channel setting until
5201          * scan finish with changed = 0
5202          */
5203         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5204
5205                 if (scan_active)
5206                         goto set_ch_out;
5207
5208                 ch = channel->hw_value;
5209                 ch_info = il_get_channel_info(il, channel->band, ch);
5210                 if (!il_is_channel_valid(ch_info)) {
5211                         D_MAC80211("leave - invalid channel\n");
5212                         ret = -EINVAL;
5213                         goto set_ch_out;
5214                 }
5215
5216                 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5217                     !il_is_channel_ibss(ch_info)) {
5218                         D_MAC80211("leave - not IBSS channel\n");
5219                         ret = -EINVAL;
5220                         goto set_ch_out;
5221                 }
5222
5223                 spin_lock_irqsave(&il->lock, flags);
5224
5225                 /* Configure HT40 channels */
5226                 if (ctx->ht.enabled != conf_is_ht(conf)) {
5227                         ctx->ht.enabled = conf_is_ht(conf);
5228                         ht_changed = true;
5229                 }
5230                 if (ctx->ht.enabled) {
5231                         if (conf_is_ht40_minus(conf)) {
5232                                 ctx->ht.extension_chan_offset =
5233                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5234                                 ctx->ht.is_40mhz = true;
5235                         } else if (conf_is_ht40_plus(conf)) {
5236                                 ctx->ht.extension_chan_offset =
5237                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5238                                 ctx->ht.is_40mhz = true;
5239                         } else {
5240                                 ctx->ht.extension_chan_offset =
5241                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5242                                 ctx->ht.is_40mhz = false;
5243                         }
5244                 } else
5245                         ctx->ht.is_40mhz = false;
5246
5247                 /*
5248                  * Default to no protection. Protection mode will
5249                  * later be set from BSS config in il_ht_conf
5250                  */
5251                 ctx->ht.protection =
5252                                 IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5253
5254                 /* if we are switching from ht to 2.4 clear flags
5255                  * from any ht related info since 2.4 does not
5256                  * support ht */
5257                 if ((le16_to_cpu(ctx->staging.channel) != ch))
5258                         ctx->staging.flags = 0;
5259
5260                 il_set_rxon_channel(il, channel, ctx);
5261                 il_set_rxon_ht(il, ht_conf);
5262
5263                 il_set_flags_for_band(il, ctx, channel->band,
5264                                        ctx->vif);
5265
5266                 spin_unlock_irqrestore(&il->lock, flags);
5267
5268                 if (il->cfg->ops->legacy->update_bcast_stations)
5269                         ret =
5270                         il->cfg->ops->legacy->update_bcast_stations(il);
5271
5272  set_ch_out:
5273                 /* The list of supported rates and rate mask can be different
5274                  * for each band; since the band may have changed, reset
5275                  * the rate mask to what mac80211 lists */
5276                 il_set_rate(il);
5277         }
5278
5279         if (changed & (IEEE80211_CONF_CHANGE_PS |
5280                         IEEE80211_CONF_CHANGE_IDLE)) {
5281                 ret = il_power_update_mode(il, false);
5282                 if (ret)
5283                         D_MAC80211("Error setting sleep level\n");
5284         }
5285
5286         if (changed & IEEE80211_CONF_CHANGE_POWER) {
5287                 D_MAC80211("TX Power old=%d new=%d\n",
5288                         il->tx_power_user_lmt, conf->power_level);
5289
5290                 il_set_tx_power(il, conf->power_level, false);
5291         }
5292
5293         if (!il_is_ready(il)) {
5294                 D_MAC80211("leave - not ready\n");
5295                 goto out;
5296         }
5297
5298         if (scan_active)
5299                 goto out;
5300
5301         if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
5302                 il_commit_rxon(il, ctx);
5303         else
5304                 D_INFO("Not re-sending same RXON configuration.\n");
5305         if (ht_changed)
5306                 il_update_qos(il, ctx);
5307
5308 out:
5309         D_MAC80211("leave\n");
5310         mutex_unlock(&il->mutex);
5311         return ret;
5312 }
5313 EXPORT_SYMBOL(il_mac_config);
5314
5315 void il_mac_reset_tsf(struct ieee80211_hw *hw,
5316                               struct ieee80211_vif *vif)
5317 {
5318         struct il_priv *il = hw->priv;
5319         unsigned long flags;
5320         struct il_rxon_context *ctx = &il->ctx;
5321
5322         if (WARN_ON(!il->cfg->ops->legacy))
5323                 return;
5324
5325         mutex_lock(&il->mutex);
5326         D_MAC80211("enter\n");
5327
5328         spin_lock_irqsave(&il->lock, flags);
5329         memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5330         spin_unlock_irqrestore(&il->lock, flags);
5331
5332         spin_lock_irqsave(&il->lock, flags);
5333
5334         /* new association get rid of ibss beacon skb */
5335         if (il->beacon_skb)
5336                 dev_kfree_skb(il->beacon_skb);
5337
5338         il->beacon_skb = NULL;
5339
5340         il->timestamp = 0;
5341
5342         spin_unlock_irqrestore(&il->lock, flags);
5343
5344         il_scan_cancel_timeout(il, 100);
5345         if (!il_is_ready_rf(il)) {
5346                 D_MAC80211("leave - not ready\n");
5347                 mutex_unlock(&il->mutex);
5348                 return;
5349         }
5350
5351         /* we are restarting association process
5352          * clear RXON_FILTER_ASSOC_MSK bit
5353          */
5354         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5355         il_commit_rxon(il, ctx);
5356
5357         il_set_rate(il);
5358
5359         mutex_unlock(&il->mutex);
5360
5361         D_MAC80211("leave\n");
5362 }
5363 EXPORT_SYMBOL(il_mac_reset_tsf);
5364
5365 static void il_ht_conf(struct il_priv *il,
5366                         struct ieee80211_vif *vif)
5367 {
5368         struct il_ht_config *ht_conf = &il->current_ht_config;
5369         struct ieee80211_sta *sta;
5370         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5371         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5372
5373         D_ASSOC("enter:\n");
5374
5375         if (!ctx->ht.enabled)
5376                 return;
5377
5378         ctx->ht.protection =
5379                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5380         ctx->ht.non_gf_sta_present =
5381                 !!(bss_conf->ht_operation_mode &
5382                                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5383
5384         ht_conf->single_chain_sufficient = false;
5385
5386         switch (vif->type) {
5387         case NL80211_IFTYPE_STATION:
5388                 rcu_read_lock();
5389                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5390                 if (sta) {
5391                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5392                         int maxstreams;
5393
5394                         maxstreams = (ht_cap->mcs.tx_params &
5395                               IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5396                                 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5397                         maxstreams += 1;
5398
5399                         if (ht_cap->mcs.rx_mask[1] == 0 &&
5400                             ht_cap->mcs.rx_mask[2] == 0)
5401                                 ht_conf->single_chain_sufficient = true;
5402                         if (maxstreams <= 1)
5403                                 ht_conf->single_chain_sufficient = true;
5404                 } else {
5405                         /*
5406                          * If at all, this can only happen through a race
5407                          * when the AP disconnects us while we're still
5408                          * setting up the connection, in that case mac80211
5409                          * will soon tell us about that.
5410                          */
5411                         ht_conf->single_chain_sufficient = true;
5412                 }
5413                 rcu_read_unlock();
5414                 break;
5415         case NL80211_IFTYPE_ADHOC:
5416                 ht_conf->single_chain_sufficient = true;
5417                 break;
5418         default:
5419                 break;
5420         }
5421
5422         D_ASSOC("leave\n");
5423 }
5424
5425 static inline void il_set_no_assoc(struct il_priv *il,
5426                                     struct ieee80211_vif *vif)
5427 {
5428         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5429
5430         /*
5431          * inform the ucode that there is no longer an
5432          * association and that no more packets should be
5433          * sent
5434          */
5435         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5436         ctx->staging.assoc_id = 0;
5437         il_commit_rxon(il, ctx);
5438 }
5439
5440 static void il_beacon_update(struct ieee80211_hw *hw,
5441                                   struct ieee80211_vif *vif)
5442 {
5443         struct il_priv *il = hw->priv;
5444         unsigned long flags;
5445         __le64 timestamp;
5446         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5447
5448         if (!skb)
5449                 return;
5450
5451         D_MAC80211("enter\n");
5452
5453         lockdep_assert_held(&il->mutex);
5454
5455         if (!il->beacon_ctx) {
5456                 IL_ERR("update beacon but no beacon context!\n");
5457                 dev_kfree_skb(skb);
5458                 return;
5459         }
5460
5461         spin_lock_irqsave(&il->lock, flags);
5462
5463         if (il->beacon_skb)
5464                 dev_kfree_skb(il->beacon_skb);
5465
5466         il->beacon_skb = skb;
5467
5468         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5469         il->timestamp = le64_to_cpu(timestamp);
5470
5471         D_MAC80211("leave\n");
5472         spin_unlock_irqrestore(&il->lock, flags);
5473
5474         if (!il_is_ready_rf(il)) {
5475                 D_MAC80211("leave - RF not ready\n");
5476                 return;
5477         }
5478
5479         il->cfg->ops->legacy->post_associate(il);
5480 }
5481
5482 void il_mac_bss_info_changed(struct ieee80211_hw *hw,
5483                                      struct ieee80211_vif *vif,
5484                                      struct ieee80211_bss_conf *bss_conf,
5485                                      u32 changes)
5486 {
5487         struct il_priv *il = hw->priv;
5488         struct il_rxon_context *ctx = il_rxon_ctx_from_vif(vif);
5489         int ret;
5490
5491         if (WARN_ON(!il->cfg->ops->legacy))
5492                 return;
5493
5494         D_MAC80211("changes = 0x%X\n", changes);
5495
5496         mutex_lock(&il->mutex);
5497
5498         if (!il_is_alive(il)) {
5499                 mutex_unlock(&il->mutex);
5500                 return;
5501         }
5502
5503         if (changes & BSS_CHANGED_QOS) {
5504                 unsigned long flags;
5505
5506                 spin_lock_irqsave(&il->lock, flags);
5507                 ctx->qos_data.qos_active = bss_conf->qos;
5508                 il_update_qos(il, ctx);
5509                 spin_unlock_irqrestore(&il->lock, flags);
5510         }
5511
5512         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5513                 /*
5514                  * the add_interface code must make sure we only ever
5515                  * have a single interface that could be beaconing at
5516                  * any time.
5517                  */
5518                 if (vif->bss_conf.enable_beacon)
5519                         il->beacon_ctx = ctx;
5520                 else
5521                         il->beacon_ctx = NULL;
5522         }
5523
5524         if (changes & BSS_CHANGED_BSSID) {
5525                 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5526
5527                 /*
5528                  * If there is currently a HW scan going on in the
5529                  * background then we need to cancel it else the RXON
5530                  * below/in post_associate will fail.
5531                  */
5532                 if (il_scan_cancel_timeout(il, 100)) {
5533                         IL_WARN(
5534                                 "Aborted scan still in progress after 100ms\n");
5535                         D_MAC80211(
5536                                 "leaving - scan abort failed.\n");
5537                         mutex_unlock(&il->mutex);
5538                         return;
5539                 }
5540
5541                 /* mac80211 only sets assoc when in STATION mode */
5542                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
5543                         memcpy(ctx->staging.bssid_addr,
5544                                bss_conf->bssid, ETH_ALEN);
5545
5546                         /* currently needed in a few places */
5547                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5548                 } else {
5549                         ctx->staging.filter_flags &=
5550                                 ~RXON_FILTER_ASSOC_MSK;
5551                 }
5552
5553         }
5554
5555         /*
5556          * This needs to be after setting the BSSID in case
5557          * mac80211 decides to do both changes at once because
5558          * it will invoke post_associate.
5559          */
5560         if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5561                 il_beacon_update(hw, vif);
5562
5563         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5564                 D_MAC80211("ERP_PREAMBLE %d\n",
5565                                    bss_conf->use_short_preamble);
5566                 if (bss_conf->use_short_preamble)
5567                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5568                 else
5569                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5570         }
5571
5572         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5573                 D_MAC80211(
5574                         "ERP_CTS %d\n", bss_conf->use_cts_prot);
5575                 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5576                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5577                 else
5578                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5579                 if (bss_conf->use_cts_prot)
5580                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
5581                 else
5582                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5583         }
5584
5585         if (changes & BSS_CHANGED_BASIC_RATES) {
5586                 /* XXX use this information
5587                  *
5588                  * To do that, remove code from il_set_rate() and put something
5589                  * like this here:
5590                  *
5591                 if (A-band)
5592                         ctx->staging.ofdm_basic_rates =
5593                                 bss_conf->basic_rates;
5594                 else
5595                         ctx->staging.ofdm_basic_rates =
5596                                 bss_conf->basic_rates >> 4;
5597                         ctx->staging.cck_basic_rates =
5598                                 bss_conf->basic_rates & 0xF;
5599                  */
5600         }
5601
5602         if (changes & BSS_CHANGED_HT) {
5603                 il_ht_conf(il, vif);
5604
5605                 if (il->cfg->ops->hcmd->set_rxon_chain)
5606                         il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
5607         }
5608
5609         if (changes & BSS_CHANGED_ASSOC) {
5610                 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5611                 if (bss_conf->assoc) {
5612                         il->timestamp = bss_conf->timestamp;
5613
5614                         if (!il_is_rfkill(il))
5615                                 il->cfg->ops->legacy->post_associate(il);
5616                 } else
5617                         il_set_no_assoc(il, vif);
5618         }
5619
5620         if (changes && il_is_associated_ctx(ctx) && bss_conf->aid) {
5621                 D_MAC80211("Changes (%#x) while associated\n",
5622                                    changes);
5623                 ret = il_send_rxon_assoc(il, ctx);
5624                 if (!ret) {
5625                         /* Sync active_rxon with latest change. */
5626                         memcpy((void *)&ctx->active,
5627                                 &ctx->staging,
5628                                 sizeof(struct il_rxon_cmd));
5629                 }
5630         }
5631
5632         if (changes & BSS_CHANGED_BEACON_ENABLED) {
5633                 if (vif->bss_conf.enable_beacon) {
5634                         memcpy(ctx->staging.bssid_addr,
5635                                bss_conf->bssid, ETH_ALEN);
5636                         memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5637                         il->cfg->ops->legacy->config_ap(il);
5638                 } else
5639                         il_set_no_assoc(il, vif);
5640         }
5641
5642         if (changes & BSS_CHANGED_IBSS) {
5643                 ret = il->cfg->ops->legacy->manage_ibss_station(il, vif,
5644                                                         bss_conf->ibss_joined);
5645                 if (ret)
5646                         IL_ERR("failed to %s IBSS station %pM\n",
5647                                 bss_conf->ibss_joined ? "add" : "remove",
5648                                 bss_conf->bssid);
5649         }
5650
5651         mutex_unlock(&il->mutex);
5652
5653         D_MAC80211("leave\n");
5654 }
5655 EXPORT_SYMBOL(il_mac_bss_info_changed);
5656
5657 irqreturn_t il_isr(int irq, void *data)
5658 {
5659         struct il_priv *il = data;
5660         u32 inta, inta_mask;
5661         u32 inta_fh;
5662         unsigned long flags;
5663         if (!il)
5664                 return IRQ_NONE;
5665
5666         spin_lock_irqsave(&il->lock, flags);
5667
5668         /* Disable (but don't clear!) interrupts here to avoid
5669          *    back-to-back ISRs and sporadic interrupts from our NIC.
5670          * If we have something to service, the tasklet will re-enable ints.
5671          * If we *don't* have something, we'll re-enable before leaving here. */
5672         inta_mask = _il_rd(il, CSR_INT_MASK);  /* just for debug */
5673         _il_wr(il, CSR_INT_MASK, 0x00000000);
5674
5675         /* Discover which interrupts are active/pending */
5676         inta = _il_rd(il, CSR_INT);
5677         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5678
5679         /* Ignore interrupt if there's nothing in NIC to service.
5680          * This may be due to IRQ shared with another device,
5681          * or due to sporadic interrupts thrown from our NIC. */
5682         if (!inta && !inta_fh) {
5683                 D_ISR(
5684                         "Ignore interrupt, inta == 0, inta_fh == 0\n");
5685                 goto none;
5686         }
5687
5688         if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5689                 /* Hardware disappeared. It might have already raised
5690                  * an interrupt */
5691                 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5692                 goto unplugged;
5693         }
5694
5695         D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5696                       inta, inta_mask, inta_fh);
5697
5698         inta &= ~CSR_INT_BIT_SCD;
5699
5700         /* il_irq_tasklet() will service interrupts and re-enable them */
5701         if (likely(inta || inta_fh))
5702                 tasklet_schedule(&il->irq_tasklet);
5703
5704 unplugged:
5705         spin_unlock_irqrestore(&il->lock, flags);
5706         return IRQ_HANDLED;
5707
5708 none:
5709         /* re-enable interrupts here since we don't have anything to service. */
5710         /* only Re-enable if disabled by irq */
5711         if (test_bit(S_INT_ENABLED, &il->status))
5712                 il_enable_interrupts(il);
5713         spin_unlock_irqrestore(&il->lock, flags);
5714         return IRQ_NONE;
5715 }
5716 EXPORT_SYMBOL(il_isr);
5717
5718 /*
5719  *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5720  *  function.
5721  */
5722 void il_tx_cmd_protection(struct il_priv *il,
5723                                struct ieee80211_tx_info *info,
5724                                __le16 fc, __le32 *tx_flags)
5725 {
5726         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5727                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5728                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5729                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5730
5731                 if (!ieee80211_is_mgmt(fc))
5732                         return;
5733
5734                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5735                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5736                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5737                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5738                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5739                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5740                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
5741                         break;
5742                 }
5743         } else if (info->control.rates[0].flags &
5744                    IEEE80211_TX_RC_USE_CTS_PROTECT) {
5745                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5746                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5747                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5748         }
5749 }
5750 EXPORT_SYMBOL(il_tx_cmd_protection);