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