linux/drivers/net/wireless/iwlegacy/3945-mac.c
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   1/******************************************************************************
   2 *
   3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4 *
   5 * Portions of this file are derived from the ipw3945 project, as well
   6 * as portions of the ieee80211 subsystem header files.
   7 *
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms of version 2 of the GNU General Public License as
  10 * published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful, but WITHOUT
  13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15 * more details.
  16 *
  17 * You should have received a copy of the GNU General Public License along with
  18 * this program; if not, write to the Free Software Foundation, Inc.,
  19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20 *
  21 * The full GNU General Public License is included in this distribution in the
  22 * file called LICENSE.
  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
  30#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32#include <linux/kernel.h>
  33#include <linux/module.h>
  34#include <linux/init.h>
  35#include <linux/pci.h>
  36#include <linux/pci-aspm.h>
  37#include <linux/slab.h>
  38#include <linux/dma-mapping.h>
  39#include <linux/delay.h>
  40#include <linux/sched.h>
  41#include <linux/skbuff.h>
  42#include <linux/netdevice.h>
  43#include <linux/firmware.h>
  44#include <linux/etherdevice.h>
  45#include <linux/if_arp.h>
  46
  47#include <net/ieee80211_radiotap.h>
  48#include <net/mac80211.h>
  49
  50#include <asm/div64.h>
  51
  52#define DRV_NAME        "iwl3945"
  53
  54#include "commands.h"
  55#include "common.h"
  56#include "3945.h"
  57#include "iwl-spectrum.h"
  58
  59/*
  60 * module name, copyright, version, etc.
  61 */
  62
  63#define DRV_DESCRIPTION \
  64"Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  65
  66#ifdef CONFIG_IWLEGACY_DEBUG
  67#define VD "d"
  68#else
  69#define VD
  70#endif
  71
  72/*
  73 * add "s" to indicate spectrum measurement included.
  74 * we add it here to be consistent with previous releases in which
  75 * this was configurable.
  76 */
  77#define DRV_VERSION  IWLWIFI_VERSION VD "s"
  78#define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
  79#define DRV_AUTHOR     "<ilw@linux.intel.com>"
  80
  81MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82MODULE_VERSION(DRV_VERSION);
  83MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  84MODULE_LICENSE("GPL");
  85
  86 /* module parameters */
  87struct il_mod_params il3945_mod_params = {
  88        .sw_crypto = 1,
  89        .restart_fw = 1,
  90        .disable_hw_scan = 1,
  91        /* the rest are 0 by default */
  92};
  93
  94/**
  95 * il3945_get_antenna_flags - Get antenna flags for RXON command
  96 * @il: eeprom and antenna fields are used to determine antenna flags
  97 *
  98 * il->eeprom39  is used to determine if antenna AUX/MAIN are reversed
  99 * il3945_mod_params.antenna specifies the antenna diversity mode:
 100 *
 101 * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 102 * IL_ANTENNA_MAIN      - Force MAIN antenna
 103 * IL_ANTENNA_AUX       - Force AUX antenna
 104 */
 105__le32
 106il3945_get_antenna_flags(const struct il_priv *il)
 107{
 108        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
 109
 110        switch (il3945_mod_params.antenna) {
 111        case IL_ANTENNA_DIVERSITY:
 112                return 0;
 113
 114        case IL_ANTENNA_MAIN:
 115                if (eeprom->antenna_switch_type)
 116                        return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 117                return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 118
 119        case IL_ANTENNA_AUX:
 120                if (eeprom->antenna_switch_type)
 121                        return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122                return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 123        }
 124
 125        /* bad antenna selector value */
 126        IL_ERR("Bad antenna selector value (0x%x)\n",
 127               il3945_mod_params.antenna);
 128
 129        return 0;               /* "diversity" is default if error */
 130}
 131
 132static int
 133il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
 134                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 135{
 136        unsigned long flags;
 137        __le16 key_flags = 0;
 138        int ret;
 139
 140        key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 141        key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 142
 143        if (sta_id == il->hw_params.bcast_id)
 144                key_flags |= STA_KEY_MULTICAST_MSK;
 145
 146        keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 147        keyconf->hw_key_idx = keyconf->keyidx;
 148        key_flags &= ~STA_KEY_FLG_INVALID;
 149
 150        spin_lock_irqsave(&il->sta_lock, flags);
 151        il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 152        il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 153        memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
 154
 155        memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
 156
 157        if ((il->stations[sta_id].sta.key.
 158             key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
 159                il->stations[sta_id].sta.key.key_offset =
 160                    il_get_free_ucode_key_idx(il);
 161        /* else, we are overriding an existing key => no need to allocated room
 162         * in uCode. */
 163
 164        WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 165             "no space for a new key");
 166
 167        il->stations[sta_id].sta.key.key_flags = key_flags;
 168        il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 169        il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 170
 171        D_INFO("hwcrypto: modify ucode station key info\n");
 172
 173        ret = il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
 174
 175        spin_unlock_irqrestore(&il->sta_lock, flags);
 176
 177        return ret;
 178}
 179
 180static int
 181il3945_set_tkip_dynamic_key_info(struct il_priv *il,
 182                                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 183{
 184        return -EOPNOTSUPP;
 185}
 186
 187static int
 188il3945_set_wep_dynamic_key_info(struct il_priv *il,
 189                                struct ieee80211_key_conf *keyconf, u8 sta_id)
 190{
 191        return -EOPNOTSUPP;
 192}
 193
 194static int
 195il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
 196{
 197        unsigned long flags;
 198        struct il_addsta_cmd sta_cmd;
 199
 200        spin_lock_irqsave(&il->sta_lock, flags);
 201        memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
 202        memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
 203        il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 204        il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 205        il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 206        memcpy(&sta_cmd, &il->stations[sta_id].sta,
 207               sizeof(struct il_addsta_cmd));
 208        spin_unlock_irqrestore(&il->sta_lock, flags);
 209
 210        D_INFO("hwcrypto: clear ucode station key info\n");
 211        return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
 212}
 213
 214static int
 215il3945_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
 216                       u8 sta_id)
 217{
 218        int ret = 0;
 219
 220        keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 221
 222        switch (keyconf->cipher) {
 223        case WLAN_CIPHER_SUITE_CCMP:
 224                ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
 225                break;
 226        case WLAN_CIPHER_SUITE_TKIP:
 227                ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
 228                break;
 229        case WLAN_CIPHER_SUITE_WEP40:
 230        case WLAN_CIPHER_SUITE_WEP104:
 231                ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
 232                break;
 233        default:
 234                IL_ERR("Unknown alg: %s alg=%x\n", __func__, keyconf->cipher);
 235                ret = -EINVAL;
 236        }
 237
 238        D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 239              keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
 240
 241        return ret;
 242}
 243
 244static int
 245il3945_remove_static_key(struct il_priv *il)
 246{
 247        int ret = -EOPNOTSUPP;
 248
 249        return ret;
 250}
 251
 252static int
 253il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key)
 254{
 255        if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 256            key->cipher == WLAN_CIPHER_SUITE_WEP104)
 257                return -EOPNOTSUPP;
 258
 259        IL_ERR("Static key invalid: cipher %x\n", key->cipher);
 260        return -EINVAL;
 261}
 262
 263static void
 264il3945_clear_free_frames(struct il_priv *il)
 265{
 266        struct list_head *element;
 267
 268        D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
 269
 270        while (!list_empty(&il->free_frames)) {
 271                element = il->free_frames.next;
 272                list_del(element);
 273                kfree(list_entry(element, struct il3945_frame, list));
 274                il->frames_count--;
 275        }
 276
 277        if (il->frames_count) {
 278                IL_WARN("%d frames still in use.  Did we lose one?\n",
 279                        il->frames_count);
 280                il->frames_count = 0;
 281        }
 282}
 283
 284static struct il3945_frame *
 285il3945_get_free_frame(struct il_priv *il)
 286{
 287        struct il3945_frame *frame;
 288        struct list_head *element;
 289        if (list_empty(&il->free_frames)) {
 290                frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 291                if (!frame) {
 292                        IL_ERR("Could not allocate frame!\n");
 293                        return NULL;
 294                }
 295
 296                il->frames_count++;
 297                return frame;
 298        }
 299
 300        element = il->free_frames.next;
 301        list_del(element);
 302        return list_entry(element, struct il3945_frame, list);
 303}
 304
 305static void
 306il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 307{
 308        memset(frame, 0, sizeof(*frame));
 309        list_add(&frame->list, &il->free_frames);
 310}
 311
 312unsigned int
 313il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
 314                         int left)
 315{
 316
 317        if (!il_is_associated(il) || !il->beacon_skb)
 318                return 0;
 319
 320        if (il->beacon_skb->len > left)
 321                return 0;
 322
 323        memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 324
 325        return il->beacon_skb->len;
 326}
 327
 328static int
 329il3945_send_beacon_cmd(struct il_priv *il)
 330{
 331        struct il3945_frame *frame;
 332        unsigned int frame_size;
 333        int rc;
 334        u8 rate;
 335
 336        frame = il3945_get_free_frame(il);
 337
 338        if (!frame) {
 339                IL_ERR("Could not obtain free frame buffer for beacon "
 340                       "command.\n");
 341                return -ENOMEM;
 342        }
 343
 344        rate = il_get_lowest_plcp(il);
 345
 346        frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 347
 348        rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
 349
 350        il3945_free_frame(il, frame);
 351
 352        return rc;
 353}
 354
 355static void
 356il3945_unset_hw_params(struct il_priv *il)
 357{
 358        if (il->_3945.shared_virt)
 359                dma_free_coherent(&il->pci_dev->dev,
 360                                  sizeof(struct il3945_shared),
 361                                  il->_3945.shared_virt, il->_3945.shared_phys);
 362}
 363
 364static void
 365il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
 366                             struct il_device_cmd *cmd,
 367                             struct sk_buff *skb_frag, int sta_id)
 368{
 369        struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 370        struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 371
 372        tx_cmd->sec_ctl = 0;
 373
 374        switch (keyinfo->cipher) {
 375        case WLAN_CIPHER_SUITE_CCMP:
 376                tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 377                memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 378                D_TX("tx_cmd with AES hwcrypto\n");
 379                break;
 380
 381        case WLAN_CIPHER_SUITE_TKIP:
 382                break;
 383
 384        case WLAN_CIPHER_SUITE_WEP104:
 385                tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 386                /* fall through */
 387        case WLAN_CIPHER_SUITE_WEP40:
 388                tx_cmd->sec_ctl |=
 389                    TX_CMD_SEC_WEP | (info->control.hw_key->
 390                                      hw_key_idx & TX_CMD_SEC_MSK) <<
 391                    TX_CMD_SEC_SHIFT;
 392
 393                memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 394
 395                D_TX("Configuring packet for WEP encryption " "with key %d\n",
 396                     info->control.hw_key->hw_key_idx);
 397                break;
 398
 399        default:
 400                IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
 401                break;
 402        }
 403}
 404
 405/*
 406 * handle build C_TX command notification.
 407 */
 408static void
 409il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd,
 410                          struct ieee80211_tx_info *info,
 411                          struct ieee80211_hdr *hdr, u8 std_id)
 412{
 413        struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 414        __le32 tx_flags = tx_cmd->tx_flags;
 415        __le16 fc = hdr->frame_control;
 416
 417        tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 418        if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 419                tx_flags |= TX_CMD_FLG_ACK_MSK;
 420                if (ieee80211_is_mgmt(fc))
 421                        tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422                if (ieee80211_is_probe_resp(fc) &&
 423                    !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 424                        tx_flags |= TX_CMD_FLG_TSF_MSK;
 425        } else {
 426                tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 427                tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 428        }
 429
 430        tx_cmd->sta_id = std_id;
 431        if (ieee80211_has_morefrags(fc))
 432                tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 433
 434        if (ieee80211_is_data_qos(fc)) {
 435                u8 *qc = ieee80211_get_qos_ctl(hdr);
 436                tx_cmd->tid_tspec = qc[0] & 0xf;
 437                tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 438        } else {
 439                tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 440        }
 441
 442        il_tx_cmd_protection(il, info, fc, &tx_flags);
 443
 444        tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 445        if (ieee80211_is_mgmt(fc)) {
 446                if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 447                        tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 448                else
 449                        tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 450        } else {
 451                tx_cmd->timeout.pm_frame_timeout = 0;
 452        }
 453
 454        tx_cmd->driver_txop = 0;
 455        tx_cmd->tx_flags = tx_flags;
 456        tx_cmd->next_frame_len = 0;
 457}
 458
 459/*
 460 * start C_TX command process
 461 */
 462static int
 463il3945_tx_skb(struct il_priv *il,
 464              struct ieee80211_sta *sta,
 465              struct sk_buff *skb)
 466{
 467        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 468        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 469        struct il3945_tx_cmd *tx_cmd;
 470        struct il_tx_queue *txq = NULL;
 471        struct il_queue *q = NULL;
 472        struct il_device_cmd *out_cmd;
 473        struct il_cmd_meta *out_meta;
 474        dma_addr_t phys_addr;
 475        dma_addr_t txcmd_phys;
 476        int txq_id = skb_get_queue_mapping(skb);
 477        u16 len, idx, hdr_len;
 478        u16 firstlen, secondlen;
 479        u8 id;
 480        u8 unicast;
 481        u8 sta_id;
 482        u8 tid = 0;
 483        __le16 fc;
 484        u8 wait_write_ptr = 0;
 485        unsigned long flags;
 486
 487        spin_lock_irqsave(&il->lock, flags);
 488        if (il_is_rfkill(il)) {
 489                D_DROP("Dropping - RF KILL\n");
 490                goto drop_unlock;
 491        }
 492
 493        if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
 494            IL_INVALID_RATE) {
 495                IL_ERR("ERROR: No TX rate available.\n");
 496                goto drop_unlock;
 497        }
 498
 499        unicast = !is_multicast_ether_addr(hdr->addr1);
 500        id = 0;
 501
 502        fc = hdr->frame_control;
 503
 504#ifdef CONFIG_IWLEGACY_DEBUG
 505        if (ieee80211_is_auth(fc))
 506                D_TX("Sending AUTH frame\n");
 507        else if (ieee80211_is_assoc_req(fc))
 508                D_TX("Sending ASSOC frame\n");
 509        else if (ieee80211_is_reassoc_req(fc))
 510                D_TX("Sending REASSOC frame\n");
 511#endif
 512
 513        spin_unlock_irqrestore(&il->lock, flags);
 514
 515        hdr_len = ieee80211_hdrlen(fc);
 516
 517        /* Find idx into station table for destination station */
 518        sta_id = il_sta_id_or_broadcast(il, sta);
 519        if (sta_id == IL_INVALID_STATION) {
 520                D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
 521                goto drop;
 522        }
 523
 524        D_RATE("station Id %d\n", sta_id);
 525
 526        if (ieee80211_is_data_qos(fc)) {
 527                u8 *qc = ieee80211_get_qos_ctl(hdr);
 528                tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 529                if (unlikely(tid >= MAX_TID_COUNT))
 530                        goto drop;
 531        }
 532
 533        /* Descriptor for chosen Tx queue */
 534        txq = &il->txq[txq_id];
 535        q = &txq->q;
 536
 537        if ((il_queue_space(q) < q->high_mark))
 538                goto drop;
 539
 540        spin_lock_irqsave(&il->lock, flags);
 541
 542        idx = il_get_cmd_idx(q, q->write_ptr, 0);
 543
 544        txq->skbs[q->write_ptr] = skb;
 545
 546        /* Init first empty entry in queue's array of Tx/cmd buffers */
 547        out_cmd = txq->cmd[idx];
 548        out_meta = &txq->meta[idx];
 549        tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 550        memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 551        memset(tx_cmd, 0, sizeof(*tx_cmd));
 552
 553        /*
 554         * Set up the Tx-command (not MAC!) header.
 555         * Store the chosen Tx queue and TFD idx within the sequence field;
 556         * after Tx, uCode's Tx response will return this value so driver can
 557         * locate the frame within the tx queue and do post-tx processing.
 558         */
 559        out_cmd->hdr.cmd = C_TX;
 560        out_cmd->hdr.sequence =
 561            cpu_to_le16((u16)
 562                        (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 563
 564        /* Copy MAC header from skb into command buffer */
 565        memcpy(tx_cmd->hdr, hdr, hdr_len);
 566
 567        if (info->control.hw_key)
 568                il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 569
 570        /* TODO need this for burst mode later on */
 571        il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 572
 573        il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 574
 575        /* Total # bytes to be transmitted */
 576        tx_cmd->len = cpu_to_le16((u16) skb->len);
 577
 578        tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 579        tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 580
 581        /*
 582         * Use the first empty entry in this queue's command buffer array
 583         * to contain the Tx command and MAC header concatenated together
 584         * (payload data will be in another buffer).
 585         * Size of this varies, due to varying MAC header length.
 586         * If end is not dword aligned, we'll have 2 extra bytes at the end
 587         * of the MAC header (device reads on dword boundaries).
 588         * We'll tell device about this padding later.
 589         */
 590        len =
 591            sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
 592            hdr_len;
 593        firstlen = (len + 3) & ~3;
 594
 595        /* Physical address of this Tx command's header (not MAC header!),
 596         * within command buffer array. */
 597        txcmd_phys =
 598            pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen,
 599                           PCI_DMA_TODEVICE);
 600        if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys)))
 601                goto drop_unlock;
 602
 603        /* Set up TFD's 2nd entry to point directly to remainder of skb,
 604         * if any (802.11 null frames have no payload). */
 605        secondlen = skb->len - hdr_len;
 606        if (secondlen > 0) {
 607                phys_addr =
 608                    pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen,
 609                                   PCI_DMA_TODEVICE);
 610                if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr)))
 611                        goto drop_unlock;
 612        }
 613
 614        /* Add buffer containing Tx command and MAC(!) header to TFD's
 615         * first entry */
 616        il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
 617        dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 618        dma_unmap_len_set(out_meta, len, firstlen);
 619        if (secondlen > 0)
 620                il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0,
 621                                               U32_PAD(secondlen));
 622
 623        if (!ieee80211_has_morefrags(hdr->frame_control)) {
 624                txq->need_update = 1;
 625        } else {
 626                wait_write_ptr = 1;
 627                txq->need_update = 0;
 628        }
 629
 630        il_update_stats(il, true, fc, skb->len);
 631
 632        D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
 633        D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 634        il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 635        il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
 636                          ieee80211_hdrlen(fc));
 637
 638        /* Tell device the write idx *just past* this latest filled TFD */
 639        q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 640        il_txq_update_write_ptr(il, txq);
 641        spin_unlock_irqrestore(&il->lock, flags);
 642
 643        if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
 644                if (wait_write_ptr) {
 645                        spin_lock_irqsave(&il->lock, flags);
 646                        txq->need_update = 1;
 647                        il_txq_update_write_ptr(il, txq);
 648                        spin_unlock_irqrestore(&il->lock, flags);
 649                }
 650
 651                il_stop_queue(il, txq);
 652        }
 653
 654        return 0;
 655
 656drop_unlock:
 657        spin_unlock_irqrestore(&il->lock, flags);
 658drop:
 659        return -1;
 660}
 661
 662static int
 663il3945_get_measurement(struct il_priv *il,
 664                       struct ieee80211_measurement_params *params, u8 type)
 665{
 666        struct il_spectrum_cmd spectrum;
 667        struct il_rx_pkt *pkt;
 668        struct il_host_cmd cmd = {
 669                .id = C_SPECTRUM_MEASUREMENT,
 670                .data = (void *)&spectrum,
 671                .flags = CMD_WANT_SKB,
 672        };
 673        u32 add_time = le64_to_cpu(params->start_time);
 674        int rc;
 675        int spectrum_resp_status;
 676        int duration = le16_to_cpu(params->duration);
 677
 678        if (il_is_associated(il))
 679                add_time =
 680                    il_usecs_to_beacons(il,
 681                                        le64_to_cpu(params->start_time) -
 682                                        il->_3945.last_tsf,
 683                                        le16_to_cpu(il->timing.beacon_interval));
 684
 685        memset(&spectrum, 0, sizeof(spectrum));
 686
 687        spectrum.channel_count = cpu_to_le16(1);
 688        spectrum.flags =
 689            RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 690        spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 691        cmd.len = sizeof(spectrum);
 692        spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 693
 694        if (il_is_associated(il))
 695                spectrum.start_time =
 696                    il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
 697                                       le16_to_cpu(il->timing.beacon_interval));
 698        else
 699                spectrum.start_time = 0;
 700
 701        spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 702        spectrum.channels[0].channel = params->channel;
 703        spectrum.channels[0].type = type;
 704        if (il->active.flags & RXON_FLG_BAND_24G_MSK)
 705                spectrum.flags |=
 706                    RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
 707                    RXON_FLG_TGG_PROTECT_MSK;
 708
 709        rc = il_send_cmd_sync(il, &cmd);
 710        if (rc)
 711                return rc;
 712
 713        pkt = (struct il_rx_pkt *)cmd.reply_page;
 714        if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 715                IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 716                rc = -EIO;
 717        }
 718
 719        spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 720        switch (spectrum_resp_status) {
 721        case 0:         /* Command will be handled */
 722                if (pkt->u.spectrum.id != 0xff) {
 723                        D_INFO("Replaced existing measurement: %d\n",
 724                               pkt->u.spectrum.id);
 725                        il->measurement_status &= ~MEASUREMENT_READY;
 726                }
 727                il->measurement_status |= MEASUREMENT_ACTIVE;
 728                rc = 0;
 729                break;
 730
 731        case 1:         /* Command will not be handled */
 732                rc = -EAGAIN;
 733                break;
 734        }
 735
 736        il_free_pages(il, cmd.reply_page);
 737
 738        return rc;
 739}
 740
 741static void
 742il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 743{
 744        struct il_rx_pkt *pkt = rxb_addr(rxb);
 745        struct il_alive_resp *palive;
 746        struct delayed_work *pwork;
 747
 748        palive = &pkt->u.alive_frame;
 749
 750        D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
 751               palive->is_valid, palive->ver_type, palive->ver_subtype);
 752
 753        if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 754                D_INFO("Initialization Alive received.\n");
 755                memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 756                       sizeof(struct il_alive_resp));
 757                pwork = &il->init_alive_start;
 758        } else {
 759                D_INFO("Runtime Alive received.\n");
 760                memcpy(&il->card_alive, &pkt->u.alive_frame,
 761                       sizeof(struct il_alive_resp));
 762                pwork = &il->alive_start;
 763                il3945_disable_events(il);
 764        }
 765
 766        /* We delay the ALIVE response by 5ms to
 767         * give the HW RF Kill time to activate... */
 768        if (palive->is_valid == UCODE_VALID_OK)
 769                queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
 770        else
 771                IL_WARN("uCode did not respond OK.\n");
 772}
 773
 774static void
 775il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 776{
 777#ifdef CONFIG_IWLEGACY_DEBUG
 778        struct il_rx_pkt *pkt = rxb_addr(rxb);
 779#endif
 780
 781        D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 782}
 783
 784static void
 785il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 786{
 787        struct il_rx_pkt *pkt = rxb_addr(rxb);
 788        struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 789#ifdef CONFIG_IWLEGACY_DEBUG
 790        u8 rate = beacon->beacon_notify_hdr.rate;
 791
 792        D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
 793             le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 794             beacon->beacon_notify_hdr.failure_frame,
 795             le32_to_cpu(beacon->ibss_mgr_status),
 796             le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 797#endif
 798
 799        il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 800
 801}
 802
 803/* Handle notification from uCode that card's power state is changing
 804 * due to software, hardware, or critical temperature RFKILL */
 805static void
 806il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 807{
 808        struct il_rx_pkt *pkt = rxb_addr(rxb);
 809        u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 810        unsigned long status = il->status;
 811
 812        IL_WARN("Card state received: HW:%s SW:%s\n",
 813                (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 814                (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 815
 816        _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 817
 818        if (flags & HW_CARD_DISABLED)
 819                set_bit(S_RFKILL, &il->status);
 820        else
 821                clear_bit(S_RFKILL, &il->status);
 822
 823        il_scan_cancel(il);
 824
 825        if ((test_bit(S_RFKILL, &status) !=
 826             test_bit(S_RFKILL, &il->status)))
 827                wiphy_rfkill_set_hw_state(il->hw->wiphy,
 828                                          test_bit(S_RFKILL, &il->status));
 829        else
 830                wake_up(&il->wait_command_queue);
 831}
 832
 833/**
 834 * il3945_setup_handlers - Initialize Rx handler callbacks
 835 *
 836 * Setup the RX handlers for each of the reply types sent from the uCode
 837 * to the host.
 838 *
 839 * This function chains into the hardware specific files for them to setup
 840 * any hardware specific handlers as well.
 841 */
 842static void
 843il3945_setup_handlers(struct il_priv *il)
 844{
 845        il->handlers[N_ALIVE] = il3945_hdl_alive;
 846        il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 847        il->handlers[N_ERROR] = il_hdl_error;
 848        il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 849        il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
 850        il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 851        il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
 852        il->handlers[N_BEACON] = il3945_hdl_beacon;
 853
 854        /*
 855         * The same handler is used for both the REPLY to a discrete
 856         * stats request from the host as well as for the periodic
 857         * stats notifications (after received beacons) from the uCode.
 858         */
 859        il->handlers[C_STATS] = il3945_hdl_c_stats;
 860        il->handlers[N_STATS] = il3945_hdl_stats;
 861
 862        il_setup_rx_scan_handlers(il);
 863        il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 864
 865        /* Set up hardware specific Rx handlers */
 866        il3945_hw_handler_setup(il);
 867}
 868
 869/************************** RX-FUNCTIONS ****************************/
 870/*
 871 * Rx theory of operation
 872 *
 873 * The host allocates 32 DMA target addresses and passes the host address
 874 * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 875 * 0 to 31
 876 *
 877 * Rx Queue Indexes
 878 * The host/firmware share two idx registers for managing the Rx buffers.
 879 *
 880 * The READ idx maps to the first position that the firmware may be writing
 881 * to -- the driver can read up to (but not including) this position and get
 882 * good data.
 883 * The READ idx is managed by the firmware once the card is enabled.
 884 *
 885 * The WRITE idx maps to the last position the driver has read from -- the
 886 * position preceding WRITE is the last slot the firmware can place a packet.
 887 *
 888 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 889 * WRITE = READ.
 890 *
 891 * During initialization, the host sets up the READ queue position to the first
 892 * IDX position, and WRITE to the last (READ - 1 wrapped)
 893 *
 894 * When the firmware places a packet in a buffer, it will advance the READ idx
 895 * and fire the RX interrupt.  The driver can then query the READ idx and
 896 * process as many packets as possible, moving the WRITE idx forward as it
 897 * resets the Rx queue buffers with new memory.
 898 *
 899 * The management in the driver is as follows:
 900 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 901 *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 902 *   to replenish the iwl->rxq->rx_free.
 903 * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 904 *   iwl->rxq is replenished and the READ IDX is updated (updating the
 905 *   'processed' and 'read' driver idxes as well)
 906 * + A received packet is processed and handed to the kernel network stack,
 907 *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 908 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 909 *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 910 *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 911 *   were enough free buffers and RX_STALLED is set it is cleared.
 912 *
 913 *
 914 * Driver sequence:
 915 *
 916 * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 917 *                            il3945_rx_queue_restock
 918 * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 919 *                            queue, updates firmware pointers, and updates
 920 *                            the WRITE idx.  If insufficient rx_free buffers
 921 *                            are available, schedules il3945_rx_replenish
 922 *
 923 * -- enable interrupts --
 924 * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 925 *                            READ IDX, detaching the SKB from the pool.
 926 *                            Moves the packet buffer from queue to rx_used.
 927 *                            Calls il3945_rx_queue_restock to refill any empty
 928 *                            slots.
 929 * ...
 930 *
 931 */
 932
 933/**
 934 * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 935 */
 936static inline __le32
 937il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 938{
 939        return cpu_to_le32((u32) dma_addr);
 940}
 941
 942/**
 943 * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 944 *
 945 * If there are slots in the RX queue that need to be restocked,
 946 * and we have free pre-allocated buffers, fill the ranks as much
 947 * as we can, pulling from rx_free.
 948 *
 949 * This moves the 'write' idx forward to catch up with 'processed', and
 950 * also updates the memory address in the firmware to reference the new
 951 * target buffer.
 952 */
 953static void
 954il3945_rx_queue_restock(struct il_priv *il)
 955{
 956        struct il_rx_queue *rxq = &il->rxq;
 957        struct list_head *element;
 958        struct il_rx_buf *rxb;
 959        unsigned long flags;
 960        int write;
 961
 962        spin_lock_irqsave(&rxq->lock, flags);
 963        write = rxq->write & ~0x7;
 964        while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 965                /* Get next free Rx buffer, remove from free list */
 966                element = rxq->rx_free.next;
 967                rxb = list_entry(element, struct il_rx_buf, list);
 968                list_del(element);
 969
 970                /* Point to Rx buffer via next RBD in circular buffer */
 971                rxq->bd[rxq->write] =
 972                    il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 973                rxq->queue[rxq->write] = rxb;
 974                rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 975                rxq->free_count--;
 976        }
 977        spin_unlock_irqrestore(&rxq->lock, flags);
 978        /* If the pre-allocated buffer pool is dropping low, schedule to
 979         * refill it */
 980        if (rxq->free_count <= RX_LOW_WATERMARK)
 981                queue_work(il->workqueue, &il->rx_replenish);
 982
 983        /* If we've added more space for the firmware to place data, tell it.
 984         * Increment device's write pointer in multiples of 8. */
 985        if (rxq->write_actual != (rxq->write & ~0x7) ||
 986            abs(rxq->write - rxq->read) > 7) {
 987                spin_lock_irqsave(&rxq->lock, flags);
 988                rxq->need_update = 1;
 989                spin_unlock_irqrestore(&rxq->lock, flags);
 990                il_rx_queue_update_write_ptr(il, rxq);
 991        }
 992}
 993
 994/**
 995 * il3945_rx_replenish - Move all used packet from rx_used to rx_free
 996 *
 997 * When moving to rx_free an SKB is allocated for the slot.
 998 *
 999 * Also restock the Rx queue via il3945_rx_queue_restock.
1000 * This is called as a scheduled work item (except for during initialization)
1001 */
1002static void
1003il3945_rx_allocate(struct il_priv *il, gfp_t priority)
1004{
1005        struct il_rx_queue *rxq = &il->rxq;
1006        struct list_head *element;
1007        struct il_rx_buf *rxb;
1008        struct page *page;
1009        dma_addr_t page_dma;
1010        unsigned long flags;
1011        gfp_t gfp_mask = priority;
1012
1013        while (1) {
1014                spin_lock_irqsave(&rxq->lock, flags);
1015                if (list_empty(&rxq->rx_used)) {
1016                        spin_unlock_irqrestore(&rxq->lock, flags);
1017                        return;
1018                }
1019                spin_unlock_irqrestore(&rxq->lock, flags);
1020
1021                if (rxq->free_count > RX_LOW_WATERMARK)
1022                        gfp_mask |= __GFP_NOWARN;
1023
1024                if (il->hw_params.rx_page_order > 0)
1025                        gfp_mask |= __GFP_COMP;
1026
1027                /* Alloc a new receive buffer */
1028                page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1029                if (!page) {
1030                        if (net_ratelimit())
1031                                D_INFO("Failed to allocate SKB buffer.\n");
1032                        if (rxq->free_count <= RX_LOW_WATERMARK &&
1033                            net_ratelimit())
1034                                IL_ERR("Failed to allocate SKB buffer with %0x."
1035                                       "Only %u free buffers remaining.\n",
1036                                       priority, rxq->free_count);
1037                        /* We don't reschedule replenish work here -- we will
1038                         * call the restock method and if it still needs
1039                         * more buffers it will schedule replenish */
1040                        break;
1041                }
1042
1043                /* Get physical address of RB/SKB */
1044                page_dma =
1045                    pci_map_page(il->pci_dev, page, 0,
1046                                 PAGE_SIZE << il->hw_params.rx_page_order,
1047                                 PCI_DMA_FROMDEVICE);
1048
1049                if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
1050                        __free_pages(page, il->hw_params.rx_page_order);
1051                        break;
1052                }
1053
1054                spin_lock_irqsave(&rxq->lock, flags);
1055
1056                if (list_empty(&rxq->rx_used)) {
1057                        spin_unlock_irqrestore(&rxq->lock, flags);
1058                        pci_unmap_page(il->pci_dev, page_dma,
1059                                       PAGE_SIZE << il->hw_params.rx_page_order,
1060                                       PCI_DMA_FROMDEVICE);
1061                        __free_pages(page, il->hw_params.rx_page_order);
1062                        return;
1063                }
1064
1065                element = rxq->rx_used.next;
1066                rxb = list_entry(element, struct il_rx_buf, list);
1067                list_del(element);
1068
1069                rxb->page = page;
1070                rxb->page_dma = page_dma;
1071                list_add_tail(&rxb->list, &rxq->rx_free);
1072                rxq->free_count++;
1073                il->alloc_rxb_page++;
1074
1075                spin_unlock_irqrestore(&rxq->lock, flags);
1076        }
1077}
1078
1079void
1080il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1081{
1082        unsigned long flags;
1083        int i;
1084        spin_lock_irqsave(&rxq->lock, flags);
1085        INIT_LIST_HEAD(&rxq->rx_free);
1086        INIT_LIST_HEAD(&rxq->rx_used);
1087        /* Fill the rx_used queue with _all_ of the Rx buffers */
1088        for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1089                /* In the reset function, these buffers may have been allocated
1090                 * to an SKB, so we need to unmap and free potential storage */
1091                if (rxq->pool[i].page != NULL) {
1092                        pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1093                                       PAGE_SIZE << il->hw_params.rx_page_order,
1094                                       PCI_DMA_FROMDEVICE);
1095                        __il_free_pages(il, rxq->pool[i].page);
1096                        rxq->pool[i].page = NULL;
1097                }
1098                list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1099        }
1100
1101        /* Set us so that we have processed and used all buffers, but have
1102         * not restocked the Rx queue with fresh buffers */
1103        rxq->read = rxq->write = 0;
1104        rxq->write_actual = 0;
1105        rxq->free_count = 0;
1106        spin_unlock_irqrestore(&rxq->lock, flags);
1107}
1108
1109void
1110il3945_rx_replenish(void *data)
1111{
1112        struct il_priv *il = data;
1113        unsigned long flags;
1114
1115        il3945_rx_allocate(il, GFP_KERNEL);
1116
1117        spin_lock_irqsave(&il->lock, flags);
1118        il3945_rx_queue_restock(il);
1119        spin_unlock_irqrestore(&il->lock, flags);
1120}
1121
1122static void
1123il3945_rx_replenish_now(struct il_priv *il)
1124{
1125        il3945_rx_allocate(il, GFP_ATOMIC);
1126
1127        il3945_rx_queue_restock(il);
1128}
1129
1130/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1131 * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1132 * This free routine walks the list of POOL entries and if SKB is set to
1133 * non NULL it is unmapped and freed
1134 */
1135static void
1136il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1137{
1138        int i;
1139        for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1140                if (rxq->pool[i].page != NULL) {
1141                        pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1142                                       PAGE_SIZE << il->hw_params.rx_page_order,
1143                                       PCI_DMA_FROMDEVICE);
1144                        __il_free_pages(il, rxq->pool[i].page);
1145                        rxq->pool[i].page = NULL;
1146                }
1147        }
1148
1149        dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1150                          rxq->bd_dma);
1151        dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1152                          rxq->rb_stts, rxq->rb_stts_dma);
1153        rxq->bd = NULL;
1154        rxq->rb_stts = NULL;
1155}
1156
1157/* Convert linear signal-to-noise ratio into dB */
1158static u8 ratio2dB[100] = {
1159/*       0   1   2   3   4   5   6   7   8   9 */
1160        0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
1161        20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1162        26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1163        29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1164        32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1165        34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1166        36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1167        37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1168        38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1169        39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1170};
1171
1172/* Calculates a relative dB value from a ratio of linear
1173 *   (i.e. not dB) signal levels.
1174 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1175int
1176il3945_calc_db_from_ratio(int sig_ratio)
1177{
1178        /* 1000:1 or higher just report as 60 dB */
1179        if (sig_ratio >= 1000)
1180                return 60;
1181
1182        /* 100:1 or higher, divide by 10 and use table,
1183         *   add 20 dB to make up for divide by 10 */
1184        if (sig_ratio >= 100)
1185                return 20 + (int)ratio2dB[sig_ratio / 10];
1186
1187        /* We shouldn't see this */
1188        if (sig_ratio < 1)
1189                return 0;
1190
1191        /* Use table for ratios 1:1 - 99:1 */
1192        return (int)ratio2dB[sig_ratio];
1193}
1194
1195/**
1196 * il3945_rx_handle - Main entry function for receiving responses from uCode
1197 *
1198 * Uses the il->handlers callback function array to invoke
1199 * the appropriate handlers, including command responses,
1200 * frame-received notifications, and other notifications.
1201 */
1202static void
1203il3945_rx_handle(struct il_priv *il)
1204{
1205        struct il_rx_buf *rxb;
1206        struct il_rx_pkt *pkt;
1207        struct il_rx_queue *rxq = &il->rxq;
1208        u32 r, i;
1209        int reclaim;
1210        unsigned long flags;
1211        u8 fill_rx = 0;
1212        u32 count = 8;
1213        int total_empty = 0;
1214
1215        /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1216         * buffer that the driver may process (last buffer filled by ucode). */
1217        r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1218        i = rxq->read;
1219
1220        /* calculate total frames need to be restock after handling RX */
1221        total_empty = r - rxq->write_actual;
1222        if (total_empty < 0)
1223                total_empty += RX_QUEUE_SIZE;
1224
1225        if (total_empty > (RX_QUEUE_SIZE / 2))
1226                fill_rx = 1;
1227        /* Rx interrupt, but nothing sent from uCode */
1228        if (i == r)
1229                D_RX("r = %d, i = %d\n", r, i);
1230
1231        while (i != r) {
1232                int len;
1233
1234                rxb = rxq->queue[i];
1235
1236                /* If an RXB doesn't have a Rx queue slot associated with it,
1237                 * then a bug has been introduced in the queue refilling
1238                 * routines -- catch it here */
1239                BUG_ON(rxb == NULL);
1240
1241                rxq->queue[i] = NULL;
1242
1243                pci_unmap_page(il->pci_dev, rxb->page_dma,
1244                               PAGE_SIZE << il->hw_params.rx_page_order,
1245                               PCI_DMA_FROMDEVICE);
1246                pkt = rxb_addr(rxb);
1247
1248                len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
1249                len += sizeof(u32);     /* account for status word */
1250
1251                reclaim = il_need_reclaim(il, pkt);
1252
1253                /* Based on type of command response or notification,
1254                 *   handle those that need handling via function in
1255                 *   handlers table.  See il3945_setup_handlers() */
1256                if (il->handlers[pkt->hdr.cmd]) {
1257                        D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1258                             il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1259                        il->isr_stats.handlers[pkt->hdr.cmd]++;
1260                        il->handlers[pkt->hdr.cmd] (il, rxb);
1261                } else {
1262                        /* No handling needed */
1263                        D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1264                             i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1265                }
1266
1267                /*
1268                 * XXX: After here, we should always check rxb->page
1269                 * against NULL before touching it or its virtual
1270                 * memory (pkt). Because some handler might have
1271                 * already taken or freed the pages.
1272                 */
1273
1274                if (reclaim) {
1275                        /* Invoke any callbacks, transfer the buffer to caller,
1276                         * and fire off the (possibly) blocking il_send_cmd()
1277                         * as we reclaim the driver command queue */
1278                        if (rxb->page)
1279                                il_tx_cmd_complete(il, rxb);
1280                        else
1281                                IL_WARN("Claim null rxb?\n");
1282                }
1283
1284                /* Reuse the page if possible. For notification packets and
1285                 * SKBs that fail to Rx correctly, add them back into the
1286                 * rx_free list for reuse later. */
1287                spin_lock_irqsave(&rxq->lock, flags);
1288                if (rxb->page != NULL) {
1289                        rxb->page_dma =
1290                            pci_map_page(il->pci_dev, rxb->page, 0,
1291                                         PAGE_SIZE << il->hw_params.
1292                                         rx_page_order, PCI_DMA_FROMDEVICE);
1293                        if (unlikely(pci_dma_mapping_error(il->pci_dev,
1294                                                           rxb->page_dma))) {
1295                                __il_free_pages(il, rxb->page);
1296                                rxb->page = NULL;
1297                                list_add_tail(&rxb->list, &rxq->rx_used);
1298                        } else {
1299                                list_add_tail(&rxb->list, &rxq->rx_free);
1300                                rxq->free_count++;
1301                        }
1302                } else
1303                        list_add_tail(&rxb->list, &rxq->rx_used);
1304
1305                spin_unlock_irqrestore(&rxq->lock, flags);
1306
1307                i = (i + 1) & RX_QUEUE_MASK;
1308                /* If there are a lot of unused frames,
1309                 * restock the Rx queue so ucode won't assert. */
1310                if (fill_rx) {
1311                        count++;
1312                        if (count >= 8) {
1313                                rxq->read = i;
1314                                il3945_rx_replenish_now(il);
1315                                count = 0;
1316                        }
1317                }
1318        }
1319
1320        /* Backtrack one entry */
1321        rxq->read = i;
1322        if (fill_rx)
1323                il3945_rx_replenish_now(il);
1324        else
1325                il3945_rx_queue_restock(il);
1326}
1327
1328/* call this function to flush any scheduled tasklet */
1329static inline void
1330il3945_synchronize_irq(struct il_priv *il)
1331{
1332        /* wait to make sure we flush pending tasklet */
1333        synchronize_irq(il->pci_dev->irq);
1334        tasklet_kill(&il->irq_tasklet);
1335}
1336
1337static const char *
1338il3945_desc_lookup(int i)
1339{
1340        switch (i) {
1341        case 1:
1342                return "FAIL";
1343        case 2:
1344                return "BAD_PARAM";
1345        case 3:
1346                return "BAD_CHECKSUM";
1347        case 4:
1348                return "NMI_INTERRUPT";
1349        case 5:
1350                return "SYSASSERT";
1351        case 6:
1352                return "FATAL_ERROR";
1353        }
1354
1355        return "UNKNOWN";
1356}
1357
1358#define ERROR_START_OFFSET  (1 * sizeof(u32))
1359#define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1360
1361void
1362il3945_dump_nic_error_log(struct il_priv *il)
1363{
1364        u32 i;
1365        u32 desc, time, count, base, data1;
1366        u32 blink1, blink2, ilink1, ilink2;
1367
1368        base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1369
1370        if (!il3945_hw_valid_rtc_data_addr(base)) {
1371                IL_ERR("Not valid error log pointer 0x%08X\n", base);
1372                return;
1373        }
1374
1375        count = il_read_targ_mem(il, base);
1376
1377        if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1378                IL_ERR("Start IWL Error Log Dump:\n");
1379                IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1380        }
1381
1382        IL_ERR("Desc       Time       asrtPC  blink2 "
1383               "ilink1  nmiPC   Line\n");
1384        for (i = ERROR_START_OFFSET;
1385             i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1386             i += ERROR_ELEM_SIZE) {
1387                desc = il_read_targ_mem(il, base + i);
1388                time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1389                blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1390                blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1391                ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1392                ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1393                data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1394
1395                IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1396                       il3945_desc_lookup(desc), desc, time, blink1, blink2,
1397                       ilink1, ilink2, data1);
1398        }
1399}
1400
1401static void
1402il3945_irq_tasklet(struct il_priv *il)
1403{
1404        u32 inta, handled = 0;
1405        u32 inta_fh;
1406        unsigned long flags;
1407#ifdef CONFIG_IWLEGACY_DEBUG
1408        u32 inta_mask;
1409#endif
1410
1411        spin_lock_irqsave(&il->lock, flags);
1412
1413        /* Ack/clear/reset pending uCode interrupts.
1414         * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1415         *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1416        inta = _il_rd(il, CSR_INT);
1417        _il_wr(il, CSR_INT, inta);
1418
1419        /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1420         * Any new interrupts that happen after this, either while we're
1421         * in this tasklet, or later, will show up in next ISR/tasklet. */
1422        inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1423        _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1424
1425#ifdef CONFIG_IWLEGACY_DEBUG
1426        if (il_get_debug_level(il) & IL_DL_ISR) {
1427                /* just for debug */
1428                inta_mask = _il_rd(il, CSR_INT_MASK);
1429                D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1430                      inta_mask, inta_fh);
1431        }
1432#endif
1433
1434        spin_unlock_irqrestore(&il->lock, flags);
1435
1436        /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1437         * atomic, make sure that inta covers all the interrupts that
1438         * we've discovered, even if FH interrupt came in just after
1439         * reading CSR_INT. */
1440        if (inta_fh & CSR39_FH_INT_RX_MASK)
1441                inta |= CSR_INT_BIT_FH_RX;
1442        if (inta_fh & CSR39_FH_INT_TX_MASK)
1443                inta |= CSR_INT_BIT_FH_TX;
1444
1445        /* Now service all interrupt bits discovered above. */
1446        if (inta & CSR_INT_BIT_HW_ERR) {
1447                IL_ERR("Hardware error detected.  Restarting.\n");
1448
1449                /* Tell the device to stop sending interrupts */
1450                il_disable_interrupts(il);
1451
1452                il->isr_stats.hw++;
1453                il_irq_handle_error(il);
1454
1455                handled |= CSR_INT_BIT_HW_ERR;
1456
1457                return;
1458        }
1459#ifdef CONFIG_IWLEGACY_DEBUG
1460        if (il_get_debug_level(il) & (IL_DL_ISR)) {
1461                /* NIC fires this, but we don't use it, redundant with WAKEUP */
1462                if (inta & CSR_INT_BIT_SCD) {
1463                        D_ISR("Scheduler finished to transmit "
1464                              "the frame/frames.\n");
1465                        il->isr_stats.sch++;
1466                }
1467
1468                /* Alive notification via Rx interrupt will do the real work */
1469                if (inta & CSR_INT_BIT_ALIVE) {
1470                        D_ISR("Alive interrupt\n");
1471                        il->isr_stats.alive++;
1472                }
1473        }
1474#endif
1475        /* Safely ignore these bits for debug checks below */
1476        inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1477
1478        /* Error detected by uCode */
1479        if (inta & CSR_INT_BIT_SW_ERR) {
1480                IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1481                       inta);
1482                il->isr_stats.sw++;
1483                il_irq_handle_error(il);
1484                handled |= CSR_INT_BIT_SW_ERR;
1485        }
1486
1487        /* uCode wakes up after power-down sleep */
1488        if (inta & CSR_INT_BIT_WAKEUP) {
1489                D_ISR("Wakeup interrupt\n");
1490                il_rx_queue_update_write_ptr(il, &il->rxq);
1491
1492                spin_lock_irqsave(&il->lock, flags);
1493                il_txq_update_write_ptr(il, &il->txq[0]);
1494                il_txq_update_write_ptr(il, &il->txq[1]);
1495                il_txq_update_write_ptr(il, &il->txq[2]);
1496                il_txq_update_write_ptr(il, &il->txq[3]);
1497                il_txq_update_write_ptr(il, &il->txq[4]);
1498                spin_unlock_irqrestore(&il->lock, flags);
1499
1500                il->isr_stats.wakeup++;
1501                handled |= CSR_INT_BIT_WAKEUP;
1502        }
1503
1504        /* All uCode command responses, including Tx command responses,
1505         * Rx "responses" (frame-received notification), and other
1506         * notifications from uCode come through here*/
1507        if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1508                il3945_rx_handle(il);
1509                il->isr_stats.rx++;
1510                handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1511        }
1512
1513        if (inta & CSR_INT_BIT_FH_TX) {
1514                D_ISR("Tx interrupt\n");
1515                il->isr_stats.tx++;
1516
1517                _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1518                il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1519                handled |= CSR_INT_BIT_FH_TX;
1520        }
1521
1522        if (inta & ~handled) {
1523                IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1524                il->isr_stats.unhandled++;
1525        }
1526
1527        if (inta & ~il->inta_mask) {
1528                IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1529                        inta & ~il->inta_mask);
1530                IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
1531        }
1532
1533        /* Re-enable all interrupts */
1534        /* only Re-enable if disabled by irq */
1535        if (test_bit(S_INT_ENABLED, &il->status))
1536                il_enable_interrupts(il);
1537
1538#ifdef CONFIG_IWLEGACY_DEBUG
1539        if (il_get_debug_level(il) & (IL_DL_ISR)) {
1540                inta = _il_rd(il, CSR_INT);
1541                inta_mask = _il_rd(il, CSR_INT_MASK);
1542                inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1543                D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1544                      "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1545        }
1546#endif
1547}
1548
1549static int
1550il3945_get_channels_for_scan(struct il_priv *il, enum ieee80211_band band,
1551                             u8 is_active, u8 n_probes,
1552                             struct il3945_scan_channel *scan_ch,
1553                             struct ieee80211_vif *vif)
1554{
1555        struct ieee80211_channel *chan;
1556        const struct ieee80211_supported_band *sband;
1557        const struct il_channel_info *ch_info;
1558        u16 passive_dwell = 0;
1559        u16 active_dwell = 0;
1560        int added, i;
1561
1562        sband = il_get_hw_mode(il, band);
1563        if (!sband)
1564                return 0;
1565
1566        active_dwell = il_get_active_dwell_time(il, band, n_probes);
1567        passive_dwell = il_get_passive_dwell_time(il, band, vif);
1568
1569        if (passive_dwell <= active_dwell)
1570                passive_dwell = active_dwell + 1;
1571
1572        for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1573                chan = il->scan_request->channels[i];
1574
1575                if (chan->band != band)
1576                        continue;
1577
1578                scan_ch->channel = chan->hw_value;
1579
1580                ch_info = il_get_channel_info(il, band, scan_ch->channel);
1581                if (!il_is_channel_valid(ch_info)) {
1582                        D_SCAN("Channel %d is INVALID for this band.\n",
1583                               scan_ch->channel);
1584                        continue;
1585                }
1586
1587                scan_ch->active_dwell = cpu_to_le16(active_dwell);
1588                scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1589                /* If passive , set up for auto-switch
1590                 *  and use long active_dwell time.
1591                 */
1592                if (!is_active || il_is_channel_passive(ch_info) ||
1593                    (chan->flags & IEEE80211_CHAN_NO_IR)) {
1594                        scan_ch->type = 0;      /* passive */
1595                        if (IL_UCODE_API(il->ucode_ver) == 1)
1596                                scan_ch->active_dwell =
1597                                    cpu_to_le16(passive_dwell - 1);
1598                } else {
1599                        scan_ch->type = 1;      /* active */
1600                }
1601
1602                /* Set direct probe bits. These may be used both for active
1603                 * scan channels (probes gets sent right away),
1604                 * or for passive channels (probes get se sent only after
1605                 * hearing clear Rx packet).*/
1606                if (IL_UCODE_API(il->ucode_ver) >= 2) {
1607                        if (n_probes)
1608                                scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1609                } else {
1610                        /* uCode v1 does not allow setting direct probe bits on
1611                         * passive channel. */
1612                        if ((scan_ch->type & 1) && n_probes)
1613                                scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1614                }
1615
1616                /* Set txpower levels to defaults */
1617                scan_ch->tpc.dsp_atten = 110;
1618                /* scan_pwr_info->tpc.dsp_atten; */
1619
1620                /*scan_pwr_info->tpc.tx_gain; */
1621                if (band == IEEE80211_BAND_5GHZ)
1622                        scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1623                else {
1624                        scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1625                        /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1626                         * power level:
1627                         * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1628                         */
1629                }
1630
1631                D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1632                       (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1633                       (scan_ch->type & 1) ? active_dwell : passive_dwell);
1634
1635                scan_ch++;
1636                added++;
1637        }
1638
1639        D_SCAN("total channels to scan %d\n", added);
1640        return added;
1641}
1642
1643static void
1644il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1645{
1646        int i;
1647
1648        for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1649                rates[i].bitrate = il3945_rates[i].ieee * 5;
1650                rates[i].hw_value = i;  /* Rate scaling will work on idxes */
1651                rates[i].hw_value_short = i;
1652                rates[i].flags = 0;
1653                if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1654                        /*
1655                         * If CCK != 1M then set short preamble rate flag.
1656                         */
1657                        rates[i].flags |=
1658                            (il3945_rates[i].plcp ==
1659                             10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1660                }
1661        }
1662}
1663
1664/******************************************************************************
1665 *
1666 * uCode download functions
1667 *
1668 ******************************************************************************/
1669
1670static void
1671il3945_dealloc_ucode_pci(struct il_priv *il)
1672{
1673        il_free_fw_desc(il->pci_dev, &il->ucode_code);
1674        il_free_fw_desc(il->pci_dev, &il->ucode_data);
1675        il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1676        il_free_fw_desc(il->pci_dev, &il->ucode_init);
1677        il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1678        il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1679}
1680
1681/**
1682 * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1683 *     looking at all data.
1684 */
1685static int
1686il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1687{
1688        u32 val;
1689        u32 save_len = len;
1690        int rc = 0;
1691        u32 errcnt;
1692
1693        D_INFO("ucode inst image size is %u\n", len);
1694
1695        il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1696
1697        errcnt = 0;
1698        for (; len > 0; len -= sizeof(u32), image++) {
1699                /* read data comes through single port, auto-incr addr */
1700                /* NOTE: Use the debugless read so we don't flood kernel log
1701                 * if IL_DL_IO is set */
1702                val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1703                if (val != le32_to_cpu(*image)) {
1704                        IL_ERR("uCode INST section is invalid at "
1705                               "offset 0x%x, is 0x%x, s/b 0x%x\n",
1706                               save_len - len, val, le32_to_cpu(*image));
1707                        rc = -EIO;
1708                        errcnt++;
1709                        if (errcnt >= 20)
1710                                break;
1711                }
1712        }
1713
1714        if (!errcnt)
1715                D_INFO("ucode image in INSTRUCTION memory is good\n");
1716
1717        return rc;
1718}
1719
1720/**
1721 * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1722 *   using sample data 100 bytes apart.  If these sample points are good,
1723 *   it's a pretty good bet that everything between them is good, too.
1724 */
1725static int
1726il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1727{
1728        u32 val;
1729        int rc = 0;
1730        u32 errcnt = 0;
1731        u32 i;
1732
1733        D_INFO("ucode inst image size is %u\n", len);
1734
1735        for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1736                /* read data comes through single port, auto-incr addr */
1737                /* NOTE: Use the debugless read so we don't flood kernel log
1738                 * if IL_DL_IO is set */
1739                il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1740                val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1741                if (val != le32_to_cpu(*image)) {
1742#if 0                           /* Enable this if you want to see details */
1743                        IL_ERR("uCode INST section is invalid at "
1744                               "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1745                               *image);
1746#endif
1747                        rc = -EIO;
1748                        errcnt++;
1749                        if (errcnt >= 3)
1750                                break;
1751                }
1752        }
1753
1754        return rc;
1755}
1756
1757/**
1758 * il3945_verify_ucode - determine which instruction image is in SRAM,
1759 *    and verify its contents
1760 */
1761static int
1762il3945_verify_ucode(struct il_priv *il)
1763{
1764        __le32 *image;
1765        u32 len;
1766        int rc = 0;
1767
1768        /* Try bootstrap */
1769        image = (__le32 *) il->ucode_boot.v_addr;
1770        len = il->ucode_boot.len;
1771        rc = il3945_verify_inst_sparse(il, image, len);
1772        if (rc == 0) {
1773                D_INFO("Bootstrap uCode is good in inst SRAM\n");
1774                return 0;
1775        }
1776
1777        /* Try initialize */
1778        image = (__le32 *) il->ucode_init.v_addr;
1779        len = il->ucode_init.len;
1780        rc = il3945_verify_inst_sparse(il, image, len);
1781        if (rc == 0) {
1782                D_INFO("Initialize uCode is good in inst SRAM\n");
1783                return 0;
1784        }
1785
1786        /* Try runtime/protocol */
1787        image = (__le32 *) il->ucode_code.v_addr;
1788        len = il->ucode_code.len;
1789        rc = il3945_verify_inst_sparse(il, image, len);
1790        if (rc == 0) {
1791                D_INFO("Runtime uCode is good in inst SRAM\n");
1792                return 0;
1793        }
1794
1795        IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1796
1797        /* Since nothing seems to match, show first several data entries in
1798         * instruction SRAM, so maybe visual inspection will give a clue.
1799         * Selection of bootstrap image (vs. other images) is arbitrary. */
1800        image = (__le32 *) il->ucode_boot.v_addr;
1801        len = il->ucode_boot.len;
1802        rc = il3945_verify_inst_full(il, image, len);
1803
1804        return rc;
1805}
1806
1807static void
1808il3945_nic_start(struct il_priv *il)
1809{
1810        /* Remove all resets to allow NIC to operate */
1811        _il_wr(il, CSR_RESET, 0);
1812}
1813
1814#define IL3945_UCODE_GET(item)                                          \
1815static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1816{                                                                       \
1817        return le32_to_cpu(ucode->v1.item);                             \
1818}
1819
1820static u32
1821il3945_ucode_get_header_size(u32 api_ver)
1822{
1823        return 24;
1824}
1825
1826static u8 *
1827il3945_ucode_get_data(const struct il_ucode_header *ucode)
1828{
1829        return (u8 *) ucode->v1.data;
1830}
1831
1832IL3945_UCODE_GET(inst_size);
1833IL3945_UCODE_GET(data_size);
1834IL3945_UCODE_GET(init_size);
1835IL3945_UCODE_GET(init_data_size);
1836IL3945_UCODE_GET(boot_size);
1837
1838/**
1839 * il3945_read_ucode - Read uCode images from disk file.
1840 *
1841 * Copy into buffers for card to fetch via bus-mastering
1842 */
1843static int
1844il3945_read_ucode(struct il_priv *il)
1845{
1846        const struct il_ucode_header *ucode;
1847        int ret = -EINVAL, idx;
1848        const struct firmware *ucode_raw;
1849        /* firmware file name contains uCode/driver compatibility version */
1850        const char *name_pre = il->cfg->fw_name_pre;
1851        const unsigned int api_max = il->cfg->ucode_api_max;
1852        const unsigned int api_min = il->cfg->ucode_api_min;
1853        char buf[25];
1854        u8 *src;
1855        size_t len;
1856        u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1857
1858        /* Ask kernel firmware_class module to get the boot firmware off disk.
1859         * request_firmware() is synchronous, file is in memory on return. */
1860        for (idx = api_max; idx >= api_min; idx--) {
1861                sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1862                ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1863                if (ret < 0) {
1864                        IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1865                        if (ret == -ENOENT)
1866                                continue;
1867                        else
1868                                goto error;
1869                } else {
1870                        if (idx < api_max)
1871                                IL_ERR("Loaded firmware %s, "
1872                                       "which is deprecated. "
1873                                       " Please use API v%u instead.\n", buf,
1874                                       api_max);
1875                        D_INFO("Got firmware '%s' file "
1876                               "(%zd bytes) from disk\n", buf, ucode_raw->size);
1877                        break;
1878                }
1879        }
1880
1881        if (ret < 0)
1882                goto error;
1883
1884        /* Make sure that we got at least our header! */
1885        if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1886                IL_ERR("File size way too small!\n");
1887                ret = -EINVAL;
1888                goto err_release;
1889        }
1890
1891        /* Data from ucode file:  header followed by uCode images */
1892        ucode = (struct il_ucode_header *)ucode_raw->data;
1893
1894        il->ucode_ver = le32_to_cpu(ucode->ver);
1895        api_ver = IL_UCODE_API(il->ucode_ver);
1896        inst_size = il3945_ucode_get_inst_size(ucode);
1897        data_size = il3945_ucode_get_data_size(ucode);
1898        init_size = il3945_ucode_get_init_size(ucode);
1899        init_data_size = il3945_ucode_get_init_data_size(ucode);
1900        boot_size = il3945_ucode_get_boot_size(ucode);
1901        src = il3945_ucode_get_data(ucode);
1902
1903        /* api_ver should match the api version forming part of the
1904         * firmware filename ... but we don't check for that and only rely
1905         * on the API version read from firmware header from here on forward */
1906
1907        if (api_ver < api_min || api_ver > api_max) {
1908                IL_ERR("Driver unable to support your firmware API. "
1909                       "Driver supports v%u, firmware is v%u.\n", api_max,
1910                       api_ver);
1911                il->ucode_ver = 0;
1912                ret = -EINVAL;
1913                goto err_release;
1914        }
1915        if (api_ver != api_max)
1916                IL_ERR("Firmware has old API version. Expected %u, "
1917                       "got %u. New firmware can be obtained "
1918                       "from http://www.intellinuxwireless.org.\n", api_max,
1919                       api_ver);
1920
1921        IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1922                IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1923                IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1924
1925        snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1926                 "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1927                 IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1928                 IL_UCODE_SERIAL(il->ucode_ver));
1929
1930        D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1931        D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1932        D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1933        D_INFO("f/w package hdr init inst size = %u\n", init_size);
1934        D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1935        D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1936
1937        /* Verify size of file vs. image size info in file's header */
1938        if (ucode_raw->size !=
1939            il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1940            init_size + init_data_size + boot_size) {
1941
1942                D_INFO("uCode file size %zd does not match expected size\n",
1943                       ucode_raw->size);
1944                ret = -EINVAL;
1945                goto err_release;
1946        }
1947
1948        /* Verify that uCode images will fit in card's SRAM */
1949        if (inst_size > IL39_MAX_INST_SIZE) {
1950                D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1951                ret = -EINVAL;
1952                goto err_release;
1953        }
1954
1955        if (data_size > IL39_MAX_DATA_SIZE) {
1956                D_INFO("uCode data len %d too large to fit in\n", data_size);
1957                ret = -EINVAL;
1958                goto err_release;
1959        }
1960        if (init_size > IL39_MAX_INST_SIZE) {
1961                D_INFO("uCode init instr len %d too large to fit in\n",
1962                       init_size);
1963                ret = -EINVAL;
1964                goto err_release;
1965        }
1966        if (init_data_size > IL39_MAX_DATA_SIZE) {
1967                D_INFO("uCode init data len %d too large to fit in\n",
1968                       init_data_size);
1969                ret = -EINVAL;
1970                goto err_release;
1971        }
1972        if (boot_size > IL39_MAX_BSM_SIZE) {
1973                D_INFO("uCode boot instr len %d too large to fit in\n",
1974                       boot_size);
1975                ret = -EINVAL;
1976                goto err_release;
1977        }
1978
1979        /* Allocate ucode buffers for card's bus-master loading ... */
1980
1981        /* Runtime instructions and 2 copies of data:
1982         * 1) unmodified from disk
1983         * 2) backup cache for save/restore during power-downs */
1984        il->ucode_code.len = inst_size;
1985        il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1986
1987        il->ucode_data.len = data_size;
1988        il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1989
1990        il->ucode_data_backup.len = data_size;
1991        il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1992
1993        if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1994            !il->ucode_data_backup.v_addr)
1995                goto err_pci_alloc;
1996
1997        /* Initialization instructions and data */
1998        if (init_size && init_data_size) {
1999                il->ucode_init.len = init_size;
2000                il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
2001
2002                il->ucode_init_data.len = init_data_size;
2003                il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
2004
2005                if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
2006                        goto err_pci_alloc;
2007        }
2008
2009        /* Bootstrap (instructions only, no data) */
2010        if (boot_size) {
2011                il->ucode_boot.len = boot_size;
2012                il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
2013
2014                if (!il->ucode_boot.v_addr)
2015                        goto err_pci_alloc;
2016        }
2017
2018        /* Copy images into buffers for card's bus-master reads ... */
2019
2020        /* Runtime instructions (first block of data in file) */
2021        len = inst_size;
2022        D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
2023        memcpy(il->ucode_code.v_addr, src, len);
2024        src += len;
2025
2026        D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2027               il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
2028
2029        /* Runtime data (2nd block)
2030         * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2031        len = data_size;
2032        D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2033        memcpy(il->ucode_data.v_addr, src, len);
2034        memcpy(il->ucode_data_backup.v_addr, src, len);
2035        src += len;
2036
2037        /* Initialization instructions (3rd block) */
2038        if (init_size) {
2039                len = init_size;
2040                D_INFO("Copying (but not loading) init instr len %zd\n", len);
2041                memcpy(il->ucode_init.v_addr, src, len);
2042                src += len;
2043        }
2044
2045        /* Initialization data (4th block) */
2046        if (init_data_size) {
2047                len = init_data_size;
2048                D_INFO("Copying (but not loading) init data len %zd\n", len);
2049                memcpy(il->ucode_init_data.v_addr, src, len);
2050                src += len;
2051        }
2052
2053        /* Bootstrap instructions (5th block) */
2054        len = boot_size;
2055        D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2056        memcpy(il->ucode_boot.v_addr, src, len);
2057
2058        /* We have our copies now, allow OS release its copies */
2059        release_firmware(ucode_raw);
2060        return 0;
2061
2062err_pci_alloc:
2063        IL_ERR("failed to allocate pci memory\n");
2064        ret = -ENOMEM;
2065        il3945_dealloc_ucode_pci(il);
2066
2067err_release:
2068        release_firmware(ucode_raw);
2069
2070error:
2071        return ret;
2072}
2073
2074/**
2075 * il3945_set_ucode_ptrs - Set uCode address location
2076 *
2077 * Tell initialization uCode where to find runtime uCode.
2078 *
2079 * BSM registers initially contain pointers to initialization uCode.
2080 * We need to replace them to load runtime uCode inst and data,
2081 * and to save runtime data when powering down.
2082 */
2083static int
2084il3945_set_ucode_ptrs(struct il_priv *il)
2085{
2086        dma_addr_t pinst;
2087        dma_addr_t pdata;
2088
2089        /* bits 31:0 for 3945 */
2090        pinst = il->ucode_code.p_addr;
2091        pdata = il->ucode_data_backup.p_addr;
2092
2093        /* Tell bootstrap uCode where to find image to load */
2094        il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2095        il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2096        il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2097
2098        /* Inst byte count must be last to set up, bit 31 signals uCode
2099         *   that all new ptr/size info is in place */
2100        il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2101                   il->ucode_code.len | BSM_DRAM_INST_LOAD);
2102
2103        D_INFO("Runtime uCode pointers are set.\n");
2104
2105        return 0;
2106}
2107
2108/**
2109 * il3945_init_alive_start - Called after N_ALIVE notification received
2110 *
2111 * Called after N_ALIVE notification received from "initialize" uCode.
2112 *
2113 * Tell "initialize" uCode to go ahead and load the runtime uCode.
2114 */
2115static void
2116il3945_init_alive_start(struct il_priv *il)
2117{
2118        /* Check alive response for "valid" sign from uCode */
2119        if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2120                /* We had an error bringing up the hardware, so take it
2121                 * all the way back down so we can try again */
2122                D_INFO("Initialize Alive failed.\n");
2123                goto restart;
2124        }
2125
2126        /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2127         * This is a paranoid check, because we would not have gotten the
2128         * "initialize" alive if code weren't properly loaded.  */
2129        if (il3945_verify_ucode(il)) {
2130                /* Runtime instruction load was bad;
2131                 * take it all the way back down so we can try again */
2132                D_INFO("Bad \"initialize\" uCode load.\n");
2133                goto restart;
2134        }
2135
2136        /* Send pointers to protocol/runtime uCode image ... init code will
2137         * load and launch runtime uCode, which will send us another "Alive"
2138         * notification. */
2139        D_INFO("Initialization Alive received.\n");
2140        if (il3945_set_ucode_ptrs(il)) {
2141                /* Runtime instruction load won't happen;
2142                 * take it all the way back down so we can try again */
2143                D_INFO("Couldn't set up uCode pointers.\n");
2144                goto restart;
2145        }
2146        return;
2147
2148restart:
2149        queue_work(il->workqueue, &il->restart);
2150}
2151
2152/**
2153 * il3945_alive_start - called after N_ALIVE notification received
2154 *                   from protocol/runtime uCode (initialization uCode's
2155 *                   Alive gets handled by il3945_init_alive_start()).
2156 */
2157static void
2158il3945_alive_start(struct il_priv *il)
2159{
2160        int thermal_spin = 0;
2161        u32 rfkill;
2162
2163        D_INFO("Runtime Alive received.\n");
2164
2165        if (il->card_alive.is_valid != UCODE_VALID_OK) {
2166                /* We had an error bringing up the hardware, so take it
2167                 * all the way back down so we can try again */
2168                D_INFO("Alive failed.\n");
2169                goto restart;
2170        }
2171
2172        /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2173         * This is a paranoid check, because we would not have gotten the
2174         * "runtime" alive if code weren't properly loaded.  */
2175        if (il3945_verify_ucode(il)) {
2176                /* Runtime instruction load was bad;
2177                 * take it all the way back down so we can try again */
2178                D_INFO("Bad runtime uCode load.\n");
2179                goto restart;
2180        }
2181
2182        rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2183        D_INFO("RFKILL status: 0x%x\n", rfkill);
2184
2185        if (rfkill & 0x1) {
2186                clear_bit(S_RFKILL, &il->status);
2187                /* if RFKILL is not on, then wait for thermal
2188                 * sensor in adapter to kick in */
2189                while (il3945_hw_get_temperature(il) == 0) {
2190                        thermal_spin++;
2191                        udelay(10);
2192                }
2193
2194                if (thermal_spin)
2195                        D_INFO("Thermal calibration took %dus\n",
2196                               thermal_spin * 10);
2197        } else
2198                set_bit(S_RFKILL, &il->status);
2199
2200        /* After the ALIVE response, we can send commands to 3945 uCode */
2201        set_bit(S_ALIVE, &il->status);
2202
2203        /* Enable watchdog to monitor the driver tx queues */
2204        il_setup_watchdog(il);
2205
2206        if (il_is_rfkill(il))
2207                return;
2208
2209        ieee80211_wake_queues(il->hw);
2210
2211        il->active_rate = RATES_MASK_3945;
2212
2213        il_power_update_mode(il, true);
2214
2215        if (il_is_associated(il)) {
2216                struct il3945_rxon_cmd *active_rxon =
2217                    (struct il3945_rxon_cmd *)(&il->active);
2218
2219                il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2220                active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2221        } else {
2222                /* Initialize our rx_config data */
2223                il_connection_init_rx_config(il);
2224        }
2225
2226        /* Configure Bluetooth device coexistence support */
2227        il_send_bt_config(il);
2228
2229        set_bit(S_READY, &il->status);
2230
2231        /* Configure the adapter for unassociated operation */
2232        il3945_commit_rxon(il);
2233
2234        il3945_reg_txpower_periodic(il);
2235
2236        D_INFO("ALIVE processing complete.\n");
2237        wake_up(&il->wait_command_queue);
2238
2239        return;
2240
2241restart:
2242        queue_work(il->workqueue, &il->restart);
2243}
2244
2245static void il3945_cancel_deferred_work(struct il_priv *il);
2246
2247static void
2248__il3945_down(struct il_priv *il)
2249{
2250        unsigned long flags;
2251        int exit_pending;
2252
2253        D_INFO(DRV_NAME " is going down\n");
2254
2255        il_scan_cancel_timeout(il, 200);
2256
2257        exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2258
2259        /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2260         * to prevent rearm timer */
2261        del_timer_sync(&il->watchdog);
2262
2263        /* Station information will now be cleared in device */
2264        il_clear_ucode_stations(il);
2265        il_dealloc_bcast_stations(il);
2266        il_clear_driver_stations(il);
2267
2268        /* Unblock any waiting calls */
2269        wake_up_all(&il->wait_command_queue);
2270
2271        /* Wipe out the EXIT_PENDING status bit if we are not actually
2272         * exiting the module */
2273        if (!exit_pending)
2274                clear_bit(S_EXIT_PENDING, &il->status);
2275
2276        /* stop and reset the on-board processor */
2277        _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2278
2279        /* tell the device to stop sending interrupts */
2280        spin_lock_irqsave(&il->lock, flags);
2281        il_disable_interrupts(il);
2282        spin_unlock_irqrestore(&il->lock, flags);
2283        il3945_synchronize_irq(il);
2284
2285        if (il->mac80211_registered)
2286                ieee80211_stop_queues(il->hw);
2287
2288        /* If we have not previously called il3945_init() then
2289         * clear all bits but the RF Kill bits and return */
2290        if (!il_is_init(il)) {
2291                il->status =
2292                    test_bit(S_RFKILL, &il->status) << S_RFKILL |
2293                    test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2294                    test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2295                goto exit;
2296        }
2297
2298        /* ...otherwise clear out all the status bits but the RF Kill
2299         * bit and continue taking the NIC down. */
2300        il->status &=
2301            test_bit(S_RFKILL, &il->status) << S_RFKILL |
2302            test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2303            test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
2304            test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2305
2306        /*
2307         * We disabled and synchronized interrupt, and priv->mutex is taken, so
2308         * here is the only thread which will program device registers, but
2309         * still have lockdep assertions, so we are taking reg_lock.
2310         */
2311        spin_lock_irq(&il->reg_lock);
2312        /* FIXME: il_grab_nic_access if rfkill is off ? */
2313
2314        il3945_hw_txq_ctx_stop(il);
2315        il3945_hw_rxq_stop(il);
2316        /* Power-down device's busmaster DMA clocks */
2317        _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2318        udelay(5);
2319        /* Stop the device, and put it in low power state */
2320        _il_apm_stop(il);
2321
2322        spin_unlock_irq(&il->reg_lock);
2323
2324        il3945_hw_txq_ctx_free(il);
2325exit:
2326        memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2327
2328        if (il->beacon_skb)
2329                dev_kfree_skb(il->beacon_skb);
2330        il->beacon_skb = NULL;
2331
2332        /* clear out any free frames */
2333        il3945_clear_free_frames(il);
2334}
2335
2336static void
2337il3945_down(struct il_priv *il)
2338{
2339        mutex_lock(&il->mutex);
2340        __il3945_down(il);
2341        mutex_unlock(&il->mutex);
2342
2343        il3945_cancel_deferred_work(il);
2344}
2345
2346#define MAX_HW_RESTARTS 5
2347
2348static int
2349il3945_alloc_bcast_station(struct il_priv *il)
2350{
2351        unsigned long flags;
2352        u8 sta_id;
2353
2354        spin_lock_irqsave(&il->sta_lock, flags);
2355        sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2356        if (sta_id == IL_INVALID_STATION) {
2357                IL_ERR("Unable to prepare broadcast station\n");
2358                spin_unlock_irqrestore(&il->sta_lock, flags);
2359
2360                return -EINVAL;
2361        }
2362
2363        il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2364        il->stations[sta_id].used |= IL_STA_BCAST;
2365        spin_unlock_irqrestore(&il->sta_lock, flags);
2366
2367        return 0;
2368}
2369
2370static int
2371__il3945_up(struct il_priv *il)
2372{
2373        int rc, i;
2374
2375        rc = il3945_alloc_bcast_station(il);
2376        if (rc)
2377                return rc;
2378
2379        if (test_bit(S_EXIT_PENDING, &il->status)) {
2380                IL_WARN("Exit pending; will not bring the NIC up\n");
2381                return -EIO;
2382        }
2383
2384        if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2385                IL_ERR("ucode not available for device bring up\n");
2386                return -EIO;
2387        }
2388
2389        /* If platform's RF_KILL switch is NOT set to KILL */
2390        if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2391                clear_bit(S_RFKILL, &il->status);
2392        else {
2393                set_bit(S_RFKILL, &il->status);
2394                return -ERFKILL;
2395        }
2396
2397        _il_wr(il, CSR_INT, 0xFFFFFFFF);
2398
2399        rc = il3945_hw_nic_init(il);
2400        if (rc) {
2401                IL_ERR("Unable to int nic\n");
2402                return rc;
2403        }
2404
2405        /* make sure rfkill handshake bits are cleared */
2406        _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2407        _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2408
2409        /* clear (again), then enable host interrupts */
2410        _il_wr(il, CSR_INT, 0xFFFFFFFF);
2411        il_enable_interrupts(il);
2412
2413        /* really make sure rfkill handshake bits are cleared */
2414        _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2415        _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2416
2417        /* Copy original ucode data image from disk into backup cache.
2418         * This will be used to initialize the on-board processor's
2419         * data SRAM for a clean start when the runtime program first loads. */
2420        memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2421               il->ucode_data.len);
2422
2423        /* We return success when we resume from suspend and rf_kill is on. */
2424        if (test_bit(S_RFKILL, &il->status))
2425                return 0;
2426
2427        for (i = 0; i < MAX_HW_RESTARTS; i++) {
2428
2429                /* load bootstrap state machine,
2430                 * load bootstrap program into processor's memory,
2431                 * prepare to load the "initialize" uCode */
2432                rc = il->ops->load_ucode(il);
2433
2434                if (rc) {
2435                        IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2436                        continue;
2437                }
2438
2439                /* start card; "initialize" will load runtime ucode */
2440                il3945_nic_start(il);
2441
2442                D_INFO(DRV_NAME " is coming up\n");
2443
2444                return 0;
2445        }
2446
2447        set_bit(S_EXIT_PENDING, &il->status);
2448        __il3945_down(il);
2449        clear_bit(S_EXIT_PENDING, &il->status);
2450
2451        /* tried to restart and config the device for as long as our
2452         * patience could withstand */
2453        IL_ERR("Unable to initialize device after %d attempts.\n", i);
2454        return -EIO;
2455}
2456
2457/*****************************************************************************
2458 *
2459 * Workqueue callbacks
2460 *
2461 *****************************************************************************/
2462
2463static void
2464il3945_bg_init_alive_start(struct work_struct *data)
2465{
2466        struct il_priv *il =
2467            container_of(data, struct il_priv, init_alive_start.work);
2468
2469        mutex_lock(&il->mutex);
2470        if (test_bit(S_EXIT_PENDING, &il->status))
2471                goto out;
2472
2473        il3945_init_alive_start(il);
2474out:
2475        mutex_unlock(&il->mutex);
2476}
2477
2478static void
2479il3945_bg_alive_start(struct work_struct *data)
2480{
2481        struct il_priv *il =
2482            container_of(data, struct il_priv, alive_start.work);
2483
2484        mutex_lock(&il->mutex);
2485        if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2486                goto out;
2487
2488        il3945_alive_start(il);
2489out:
2490        mutex_unlock(&il->mutex);
2491}
2492
2493/*
2494 * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2495 * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2496 * *is* readable even when device has been SW_RESET into low power mode
2497 * (e.g. during RF KILL).
2498 */
2499static void
2500il3945_rfkill_poll(struct work_struct *data)
2501{
2502        struct il_priv *il =
2503            container_of(data, struct il_priv, _3945.rfkill_poll.work);
2504        bool old_rfkill = test_bit(S_RFKILL, &il->status);
2505        bool new_rfkill =
2506            !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2507
2508        if (new_rfkill != old_rfkill) {
2509                if (new_rfkill)
2510                        set_bit(S_RFKILL, &il->status);
2511                else
2512                        clear_bit(S_RFKILL, &il->status);
2513
2514                wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2515
2516                D_RF_KILL("RF_KILL bit toggled to %s.\n",
2517                          new_rfkill ? "disable radio" : "enable radio");
2518        }
2519
2520        /* Keep this running, even if radio now enabled.  This will be
2521         * cancelled in mac_start() if system decides to start again */
2522        queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2523                           round_jiffies_relative(2 * HZ));
2524
2525}
2526
2527int
2528il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2529{
2530        struct il_host_cmd cmd = {
2531                .id = C_SCAN,
2532                .len = sizeof(struct il3945_scan_cmd),
2533                .flags = CMD_SIZE_HUGE,
2534        };
2535        struct il3945_scan_cmd *scan;
2536        u8 n_probes = 0;
2537        enum ieee80211_band band;
2538        bool is_active = false;
2539        int ret;
2540        u16 len;
2541
2542        lockdep_assert_held(&il->mutex);
2543
2544        if (!il->scan_cmd) {
2545                il->scan_cmd =
2546                    kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2547                            GFP_KERNEL);
2548                if (!il->scan_cmd) {
2549                        D_SCAN("Fail to allocate scan memory\n");
2550                        return -ENOMEM;
2551                }
2552        }
2553        scan = il->scan_cmd;
2554        memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2555
2556        scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2557        scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2558
2559        if (il_is_associated(il)) {
2560                u16 interval;
2561                u32 extra;
2562                u32 suspend_time = 100;
2563                u32 scan_suspend_time = 100;
2564
2565                D_INFO("Scanning while associated...\n");
2566
2567                interval = vif->bss_conf.beacon_int;
2568
2569                scan->suspend_time = 0;
2570                scan->max_out_time = cpu_to_le32(200 * 1024);
2571                if (!interval)
2572                        interval = suspend_time;
2573                /*
2574                 * suspend time format:
2575                 *  0-19: beacon interval in usec (time before exec.)
2576                 * 20-23: 0
2577                 * 24-31: number of beacons (suspend between channels)
2578                 */
2579
2580                extra = (suspend_time / interval) << 24;
2581                scan_suspend_time =
2582                    0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2583
2584                scan->suspend_time = cpu_to_le32(scan_suspend_time);
2585                D_SCAN("suspend_time 0x%X beacon interval %d\n",
2586                       scan_suspend_time, interval);
2587        }
2588
2589        if (il->scan_request->n_ssids) {
2590                int i, p = 0;
2591                D_SCAN("Kicking off active scan\n");
2592                for (i = 0; i < il->scan_request->n_ssids; i++) {
2593                        /* always does wildcard anyway */
2594                        if (!il->scan_request->ssids[i].ssid_len)
2595                                continue;
2596                        scan->direct_scan[p].id = WLAN_EID_SSID;
2597                        scan->direct_scan[p].len =
2598                            il->scan_request->ssids[i].ssid_len;
2599                        memcpy(scan->direct_scan[p].ssid,
2600                               il->scan_request->ssids[i].ssid,
2601                               il->scan_request->ssids[i].ssid_len);
2602                        n_probes++;
2603                        p++;
2604                }
2605                is_active = true;
2606        } else
2607                D_SCAN("Kicking off passive scan.\n");
2608
2609        /* We don't build a direct scan probe request; the uCode will do
2610         * that based on the direct_mask added to each channel entry */
2611        scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2612        scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2613        scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2614
2615        /* flags + rate selection */
2616
2617        switch (il->scan_band) {
2618        case IEEE80211_BAND_2GHZ:
2619                scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2620                scan->tx_cmd.rate = RATE_1M_PLCP;
2621                band = IEEE80211_BAND_2GHZ;
2622                break;
2623        case IEEE80211_BAND_5GHZ:
2624                scan->tx_cmd.rate = RATE_6M_PLCP;
2625                band = IEEE80211_BAND_5GHZ;
2626                break;
2627        default:
2628                IL_WARN("Invalid scan band\n");
2629                return -EIO;
2630        }
2631
2632        /*
2633         * If active scaning is requested but a certain channel is marked
2634         * passive, we can do active scanning if we detect transmissions. For
2635         * passive only scanning disable switching to active on any channel.
2636         */
2637        scan->good_CRC_th =
2638            is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2639
2640        len =
2641            il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2642                              vif->addr, il->scan_request->ie,
2643                              il->scan_request->ie_len,
2644                              IL_MAX_SCAN_SIZE - sizeof(*scan));
2645        scan->tx_cmd.len = cpu_to_le16(len);
2646
2647        /* select Rx antennas */
2648        scan->flags |= il3945_get_antenna_flags(il);
2649
2650        scan->channel_count =
2651            il3945_get_channels_for_scan(il, band, is_active, n_probes,
2652                                         (void *)&scan->data[len], vif);
2653        if (scan->channel_count == 0) {
2654                D_SCAN("channel count %d\n", scan->channel_count);
2655                return -EIO;
2656        }
2657
2658        cmd.len +=
2659            le16_to_cpu(scan->tx_cmd.len) +
2660            scan->channel_count * sizeof(struct il3945_scan_channel);
2661        cmd.data = scan;
2662        scan->len = cpu_to_le16(cmd.len);
2663
2664        set_bit(S_SCAN_HW, &il->status);
2665        ret = il_send_cmd_sync(il, &cmd);
2666        if (ret)
2667                clear_bit(S_SCAN_HW, &il->status);
2668        return ret;
2669}
2670
2671void
2672il3945_post_scan(struct il_priv *il)
2673{
2674        /*
2675         * Since setting the RXON may have been deferred while
2676         * performing the scan, fire one off if needed
2677         */
2678        if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2679                il3945_commit_rxon(il);
2680}
2681
2682static void
2683il3945_bg_restart(struct work_struct *data)
2684{
2685        struct il_priv *il = container_of(data, struct il_priv, restart);
2686
2687        if (test_bit(S_EXIT_PENDING, &il->status))
2688                return;
2689
2690        if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2691                mutex_lock(&il->mutex);
2692                il->is_open = 0;
2693                mutex_unlock(&il->mutex);
2694                il3945_down(il);
2695                ieee80211_restart_hw(il->hw);
2696        } else {
2697                il3945_down(il);
2698
2699                mutex_lock(&il->mutex);
2700                if (test_bit(S_EXIT_PENDING, &il->status)) {
2701                        mutex_unlock(&il->mutex);
2702                        return;
2703                }
2704
2705                __il3945_up(il);
2706                mutex_unlock(&il->mutex);
2707        }
2708}
2709
2710static void
2711il3945_bg_rx_replenish(struct work_struct *data)
2712{
2713        struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2714
2715        mutex_lock(&il->mutex);
2716        if (test_bit(S_EXIT_PENDING, &il->status))
2717                goto out;
2718
2719        il3945_rx_replenish(il);
2720out:
2721        mutex_unlock(&il->mutex);
2722}
2723
2724void
2725il3945_post_associate(struct il_priv *il)
2726{
2727        int rc = 0;
2728        struct ieee80211_conf *conf = NULL;
2729
2730        if (!il->vif || !il->is_open)
2731                return;
2732
2733        D_ASSOC("Associated as %d to: %pM\n", il->vif->bss_conf.aid,
2734                il->active.bssid_addr);
2735
2736        if (test_bit(S_EXIT_PENDING, &il->status))
2737                return;
2738
2739        il_scan_cancel_timeout(il, 200);
2740
2741        conf = &il->hw->conf;
2742
2743        il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2744        il3945_commit_rxon(il);
2745
2746        rc = il_send_rxon_timing(il);
2747        if (rc)
2748                IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2749
2750        il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2751
2752        il->staging.assoc_id = cpu_to_le16(il->vif->bss_conf.aid);
2753
2754        D_ASSOC("assoc id %d beacon interval %d\n", il->vif->bss_conf.aid,
2755                il->vif->bss_conf.beacon_int);
2756
2757        if (il->vif->bss_conf.use_short_preamble)
2758                il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2759        else
2760                il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2761
2762        if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2763                if (il->vif->bss_conf.use_short_slot)
2764                        il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2765                else
2766                        il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2767        }
2768
2769        il3945_commit_rxon(il);
2770
2771        switch (il->vif->type) {
2772        case NL80211_IFTYPE_STATION:
2773                il3945_rate_scale_init(il->hw, IL_AP_ID);
2774                break;
2775        case NL80211_IFTYPE_ADHOC:
2776                il3945_send_beacon_cmd(il);
2777                break;
2778        default:
2779                IL_ERR("%s Should not be called in %d mode\n", __func__,
2780                      il->vif->type);
2781                break;
2782        }
2783}
2784
2785/*****************************************************************************
2786 *
2787 * mac80211 entry point functions
2788 *
2789 *****************************************************************************/
2790
2791#define UCODE_READY_TIMEOUT     (2 * HZ)
2792
2793static int
2794il3945_mac_start(struct ieee80211_hw *hw)
2795{
2796        struct il_priv *il = hw->priv;
2797        int ret;
2798
2799        /* we should be verifying the device is ready to be opened */
2800        mutex_lock(&il->mutex);
2801        D_MAC80211("enter\n");
2802
2803        /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2804         * ucode filename and max sizes are card-specific. */
2805
2806        if (!il->ucode_code.len) {
2807                ret = il3945_read_ucode(il);
2808                if (ret) {
2809                        IL_ERR("Could not read microcode: %d\n", ret);
2810                        mutex_unlock(&il->mutex);
2811                        goto out_release_irq;
2812                }
2813        }
2814
2815        ret = __il3945_up(il);
2816
2817        mutex_unlock(&il->mutex);
2818
2819        if (ret)
2820                goto out_release_irq;
2821
2822        D_INFO("Start UP work.\n");
2823
2824        /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2825         * mac80211 will not be run successfully. */
2826        ret = wait_event_timeout(il->wait_command_queue,
2827                                 test_bit(S_READY, &il->status),
2828                                 UCODE_READY_TIMEOUT);
2829        if (!ret) {
2830                if (!test_bit(S_READY, &il->status)) {
2831                        IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2832                               jiffies_to_msecs(UCODE_READY_TIMEOUT));
2833                        ret = -ETIMEDOUT;
2834                        goto out_release_irq;
2835                }
2836        }
2837
2838        /* ucode is running and will send rfkill notifications,
2839         * no need to poll the killswitch state anymore */
2840        cancel_delayed_work(&il->_3945.rfkill_poll);
2841
2842        il->is_open = 1;
2843        D_MAC80211("leave\n");
2844        return 0;
2845
2846out_release_irq:
2847        il->is_open = 0;
2848        D_MAC80211("leave - failed\n");
2849        return ret;
2850}
2851
2852static void
2853il3945_mac_stop(struct ieee80211_hw *hw)
2854{
2855        struct il_priv *il = hw->priv;
2856
2857        D_MAC80211("enter\n");
2858
2859        if (!il->is_open) {
2860                D_MAC80211("leave - skip\n");
2861                return;
2862        }
2863
2864        il->is_open = 0;
2865
2866        il3945_down(il);
2867
2868        flush_workqueue(il->workqueue);
2869
2870        /* start polling the killswitch state again */
2871        queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2872                           round_jiffies_relative(2 * HZ));
2873
2874        D_MAC80211("leave\n");
2875}
2876
2877static void
2878il3945_mac_tx(struct ieee80211_hw *hw,
2879               struct ieee80211_tx_control *control,
2880               struct sk_buff *skb)
2881{
2882        struct il_priv *il = hw->priv;
2883
2884        D_MAC80211("enter\n");
2885
2886        D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2887             ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2888
2889        if (il3945_tx_skb(il, control->sta, skb))
2890                dev_kfree_skb_any(skb);
2891
2892        D_MAC80211("leave\n");
2893}
2894
2895void
2896il3945_config_ap(struct il_priv *il)
2897{
2898        struct ieee80211_vif *vif = il->vif;
2899        int rc = 0;
2900
2901        if (test_bit(S_EXIT_PENDING, &il->status))
2902                return;
2903
2904        /* The following should be done only at AP bring up */
2905        if (!(il_is_associated(il))) {
2906
2907                /* RXON - unassoc (to set timing command) */
2908                il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2909                il3945_commit_rxon(il);
2910
2911                /* RXON Timing */
2912                rc = il_send_rxon_timing(il);
2913                if (rc)
2914                        IL_WARN("C_RXON_TIMING failed - "
2915                                "Attempting to continue.\n");
2916
2917                il->staging.assoc_id = 0;
2918
2919                if (vif->bss_conf.use_short_preamble)
2920                        il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2921                else
2922                        il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2923
2924                if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2925                        if (vif->bss_conf.use_short_slot)
2926                                il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2927                        else
2928                                il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2929                }
2930                /* restore RXON assoc */
2931                il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2932                il3945_commit_rxon(il);
2933        }
2934        il3945_send_beacon_cmd(il);
2935}
2936
2937static int
2938il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2939                   struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2940                   struct ieee80211_key_conf *key)
2941{
2942        struct il_priv *il = hw->priv;
2943        int ret = 0;
2944        u8 sta_id = IL_INVALID_STATION;
2945        u8 static_key;
2946
2947        D_MAC80211("enter\n");
2948
2949        if (il3945_mod_params.sw_crypto) {
2950                D_MAC80211("leave - hwcrypto disabled\n");
2951                return -EOPNOTSUPP;
2952        }
2953
2954        /*
2955         * To support IBSS RSN, don't program group keys in IBSS, the
2956         * hardware will then not attempt to decrypt the frames.
2957         */
2958        if (vif->type == NL80211_IFTYPE_ADHOC &&
2959            !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2960                D_MAC80211("leave - IBSS RSN\n");
2961                return -EOPNOTSUPP;
2962        }
2963
2964        static_key = !il_is_associated(il);
2965
2966        if (!static_key) {
2967                sta_id = il_sta_id_or_broadcast(il, sta);
2968                if (sta_id == IL_INVALID_STATION) {
2969                        D_MAC80211("leave - station not found\n");
2970                        return -EINVAL;
2971                }
2972        }
2973
2974        mutex_lock(&il->mutex);
2975        il_scan_cancel_timeout(il, 100);
2976
2977        switch (cmd) {
2978        case SET_KEY:
2979                if (static_key)
2980                        ret = il3945_set_static_key(il, key);
2981                else
2982                        ret = il3945_set_dynamic_key(il, key, sta_id);
2983                D_MAC80211("enable hwcrypto key\n");
2984                break;
2985        case DISABLE_KEY:
2986                if (static_key)
2987                        ret = il3945_remove_static_key(il);
2988                else
2989                        ret = il3945_clear_sta_key_info(il, sta_id);
2990                D_MAC80211("disable hwcrypto key\n");
2991                break;
2992        default:
2993                ret = -EINVAL;
2994        }
2995
2996        D_MAC80211("leave ret %d\n", ret);
2997        mutex_unlock(&il->mutex);
2998
2999        return ret;
3000}
3001
3002static int
3003il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3004                   struct ieee80211_sta *sta)
3005{
3006        struct il_priv *il = hw->priv;
3007        struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3008        int ret;
3009        bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3010        u8 sta_id;
3011
3012        mutex_lock(&il->mutex);
3013        D_INFO("station %pM\n", sta->addr);
3014        sta_priv->common.sta_id = IL_INVALID_STATION;
3015
3016        ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
3017        if (ret) {
3018                IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
3019                /* Should we return success if return code is EEXIST ? */
3020                mutex_unlock(&il->mutex);
3021                return ret;
3022        }
3023
3024        sta_priv->common.sta_id = sta_id;
3025
3026        /* Initialize rate scaling */
3027        D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
3028        il3945_rs_rate_init(il, sta, sta_id);
3029        mutex_unlock(&il->mutex);
3030
3031        return 0;
3032}
3033
3034static void
3035il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
3036                        unsigned int *total_flags, u64 multicast)
3037{
3038        struct il_priv *il = hw->priv;
3039        __le32 filter_or = 0, filter_nand = 0;
3040
3041#define CHK(test, flag) do { \
3042        if (*total_flags & (test))              \
3043                filter_or |= (flag);            \
3044        else                                    \
3045                filter_nand |= (flag);          \
3046        } while (0)
3047
3048        D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3049                   *total_flags);
3050
3051        CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
3052        CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3053        CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3054
3055#undef CHK
3056
3057        mutex_lock(&il->mutex);
3058
3059        il->staging.filter_flags &= ~filter_nand;
3060        il->staging.filter_flags |= filter_or;
3061
3062        /*
3063         * Not committing directly because hardware can perform a scan,
3064         * but even if hw is ready, committing here breaks for some reason,
3065         * we'll eventually commit the filter flags change anyway.
3066         */
3067
3068        mutex_unlock(&il->mutex);
3069
3070        /*
3071         * Receiving all multicast frames is always enabled by the
3072         * default flags setup in il_connection_init_rx_config()
3073         * since we currently do not support programming multicast
3074         * filters into the device.
3075         */
3076        *total_flags &=
3077            FIF_OTHER_BSS | FIF_ALLMULTI |
3078            FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3079}
3080
3081/*****************************************************************************
3082 *
3083 * sysfs attributes
3084 *
3085 *****************************************************************************/
3086
3087#ifdef CONFIG_IWLEGACY_DEBUG
3088
3089/*
3090 * The following adds a new attribute to the sysfs representation
3091 * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3092 * used for controlling the debug level.
3093 *
3094 * See the level definitions in iwl for details.
3095 *
3096 * The debug_level being managed using sysfs below is a per device debug
3097 * level that is used instead of the global debug level if it (the per
3098 * device debug level) is set.
3099 */
3100static ssize_t
3101il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3102                        char *buf)
3103{
3104        struct il_priv *il = dev_get_drvdata(d);
3105        return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3106}
3107
3108static ssize_t
3109il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3110                         const char *buf, size_t count)
3111{
3112        struct il_priv *il = dev_get_drvdata(d);
3113        unsigned long val;
3114        int ret;
3115
3116        ret = kstrtoul(buf, 0, &val);
3117        if (ret)
3118                IL_INFO("%s is not in hex or decimal form.\n", buf);
3119        else
3120                il->debug_level = val;
3121
3122        return strnlen(buf, count);
3123}
3124
3125static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, il3945_show_debug_level,
3126                   il3945_store_debug_level);
3127
3128#endif /* CONFIG_IWLEGACY_DEBUG */
3129
3130static ssize_t
3131il3945_show_temperature(struct device *d, struct device_attribute *attr,
3132                        char *buf)
3133{
3134        struct il_priv *il = dev_get_drvdata(d);
3135
3136        if (!il_is_alive(il))
3137                return -EAGAIN;
3138
3139        return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3140}
3141
3142static DEVICE_ATTR(temperature, S_IRUGO, il3945_show_temperature, NULL);
3143
3144static ssize_t
3145il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3146{
3147        struct il_priv *il = dev_get_drvdata(d);
3148        return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3149}
3150
3151static ssize_t
3152il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3153                      const char *buf, size_t count)
3154{
3155        struct il_priv *il = dev_get_drvdata(d);
3156        char *p = (char *)buf;
3157        u32 val;
3158
3159        val = simple_strtoul(p, &p, 10);
3160        if (p == buf)
3161                IL_INFO(": %s is not in decimal form.\n", buf);
3162        else
3163                il3945_hw_reg_set_txpower(il, val);
3164
3165        return count;
3166}
3167
3168static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il3945_show_tx_power,
3169                   il3945_store_tx_power);
3170
3171static ssize_t
3172il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3173{
3174        struct il_priv *il = dev_get_drvdata(d);
3175
3176        return sprintf(buf, "0x%04X\n", il->active.flags);
3177}
3178
3179static ssize_t
3180il3945_store_flags(struct device *d, struct device_attribute *attr,
3181                   const char *buf, size_t count)
3182{
3183        struct il_priv *il = dev_get_drvdata(d);
3184        u32 flags = simple_strtoul(buf, NULL, 0);
3185
3186        mutex_lock(&il->mutex);
3187        if (le32_to_cpu(il->staging.flags) != flags) {
3188                /* Cancel any currently running scans... */
3189                if (il_scan_cancel_timeout(il, 100))
3190                        IL_WARN("Could not cancel scan.\n");
3191                else {
3192                        D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3193                        il->staging.flags = cpu_to_le32(flags);
3194                        il3945_commit_rxon(il);
3195                }
3196        }
3197        mutex_unlock(&il->mutex);
3198
3199        return count;
3200}
3201
3202static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, il3945_show_flags,
3203                   il3945_store_flags);
3204
3205static ssize_t
3206il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3207                         char *buf)
3208{
3209        struct il_priv *il = dev_get_drvdata(d);
3210
3211        return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3212}
3213
3214static ssize_t
3215il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
3216                          const char *buf, size_t count)
3217{
3218        struct il_priv *il = dev_get_drvdata(d);
3219        u32 filter_flags = simple_strtoul(buf, NULL, 0);
3220
3221        mutex_lock(&il->mutex);
3222        if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
3223                /* Cancel any currently running scans... */
3224                if (il_scan_cancel_timeout(il, 100))
3225                        IL_WARN("Could not cancel scan.\n");
3226                else {
3227                        D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
3228                               filter_flags);
3229                        il->staging.filter_flags = cpu_to_le32(filter_flags);
3230                        il3945_commit_rxon(il);
3231                }
3232        }
3233        mutex_unlock(&il->mutex);
3234
3235        return count;
3236}
3237
3238static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, il3945_show_filter_flags,
3239                   il3945_store_filter_flags);
3240
3241static ssize_t
3242il3945_show_measurement(struct device *d, struct device_attribute *attr,
3243                        char *buf)
3244{
3245        struct il_priv *il = dev_get_drvdata(d);
3246        struct il_spectrum_notification measure_report;
3247        u32 size = sizeof(measure_report), len = 0, ofs = 0;
3248        u8 *data = (u8 *) &measure_report;
3249        unsigned long flags;
3250
3251        spin_lock_irqsave(&il->lock, flags);
3252        if (!(il->measurement_status & MEASUREMENT_READY)) {
3253                spin_unlock_irqrestore(&il->lock, flags);
3254                return 0;
3255        }
3256        memcpy(&measure_report, &il->measure_report, size);
3257        il->measurement_status = 0;
3258        spin_unlock_irqrestore(&il->lock, flags);
3259
3260        while (size && PAGE_SIZE - len) {
3261                hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3262                                   PAGE_SIZE - len, true);
3263                len = strlen(buf);
3264                if (PAGE_SIZE - len)
3265                        buf[len++] = '\n';
3266
3267                ofs += 16;
3268                size -= min(size, 16U);
3269        }
3270
3271        return len;
3272}
3273
3274static ssize_t
3275il3945_store_measurement(struct device *d, struct device_attribute *attr,
3276                         const char *buf, size_t count)
3277{
3278        struct il_priv *il = dev_get_drvdata(d);
3279        struct ieee80211_measurement_params params = {
3280                .channel = le16_to_cpu(il->active.channel),
3281                .start_time = cpu_to_le64(il->_3945.last_tsf),
3282                .duration = cpu_to_le16(1),
3283        };
3284        u8 type = IL_MEASURE_BASIC;
3285        u8 buffer[32];
3286        u8 channel;
3287
3288        if (count) {
3289                char *p = buffer;
3290                strlcpy(buffer, buf, sizeof(buffer));
3291                channel = simple_strtoul(p, NULL, 0);
3292                if (channel)
3293                        params.channel = channel;
3294
3295                p = buffer;
3296                while (*p && *p != ' ')
3297                        p++;
3298                if (*p)
3299                        type = simple_strtoul(p + 1, NULL, 0);
3300        }
3301
3302        D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3303               type, params.channel, buf);
3304        il3945_get_measurement(il, &params, type);
3305
3306        return count;
3307}
3308
3309static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, il3945_show_measurement,
3310                   il3945_store_measurement);
3311
3312static ssize_t
3313il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3314                        const char *buf, size_t count)
3315{
3316        struct il_priv *il = dev_get_drvdata(d);
3317
3318        il->retry_rate = simple_strtoul(buf, NULL, 0);
3319        if (il->retry_rate <= 0)
3320                il->retry_rate = 1;
3321
3322        return count;
3323}
3324
3325static ssize_t
3326il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3327                       char *buf)
3328{
3329        struct il_priv *il = dev_get_drvdata(d);
3330        return sprintf(buf, "%d", il->retry_rate);
3331}
3332
3333static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, il3945_show_retry_rate,
3334                   il3945_store_retry_rate);
3335
3336static ssize_t
3337il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3338{
3339        /* all this shit doesn't belong into sysfs anyway */
3340        return 0;
3341}
3342
3343static DEVICE_ATTR(channels, S_IRUSR, il3945_show_channels, NULL);
3344
3345static ssize_t
3346il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3347{
3348        struct il_priv *il = dev_get_drvdata(d);
3349
3350        if (!il_is_alive(il))
3351                return -EAGAIN;
3352
3353        return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3354}
3355
3356static ssize_t
3357il3945_store_antenna(struct device *d, struct device_attribute *attr,
3358                     const char *buf, size_t count)
3359{
3360        struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3361        int ant;
3362
3363        if (count == 0)
3364                return 0;
3365
3366        if (sscanf(buf, "%1i", &ant) != 1) {
3367                D_INFO("not in hex or decimal form.\n");
3368                return count;
3369        }
3370
3371        if (ant >= 0 && ant <= 2) {
3372                D_INFO("Setting antenna select to %d.\n", ant);
3373                il3945_mod_params.antenna = (enum il3945_antenna)ant;
3374        } else
3375                D_INFO("Bad antenna select value %d.\n", ant);
3376
3377        return count;
3378}
3379
3380static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, il3945_show_antenna,
3381                   il3945_store_antenna);
3382
3383static ssize_t
3384il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3385{
3386        struct il_priv *il = dev_get_drvdata(d);
3387        if (!il_is_alive(il))
3388                return -EAGAIN;
3389        return sprintf(buf, "0x%08x\n", (int)il->status);
3390}
3391
3392static DEVICE_ATTR(status, S_IRUGO, il3945_show_status, NULL);
3393
3394static ssize_t
3395il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3396                      const char *buf, size_t count)
3397{
3398        struct il_priv *il = dev_get_drvdata(d);
3399        char *p = (char *)buf;
3400
3401        if (p[0] == '1')
3402                il3945_dump_nic_error_log(il);
3403
3404        return strnlen(buf, count);
3405}
3406
3407static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, il3945_dump_error_log);
3408
3409/*****************************************************************************
3410 *
3411 * driver setup and tear down
3412 *
3413 *****************************************************************************/
3414
3415static void
3416il3945_setup_deferred_work(struct il_priv *il)
3417{
3418        il->workqueue = create_singlethread_workqueue(DRV_NAME);
3419
3420        init_waitqueue_head(&il->wait_command_queue);
3421
3422        INIT_WORK(&il->restart, il3945_bg_restart);
3423        INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3424        INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3425        INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3426        INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3427
3428        il_setup_scan_deferred_work(il);
3429
3430        il3945_hw_setup_deferred_work(il);
3431
3432        setup_timer(&il->watchdog, il_bg_watchdog, (unsigned long)il);
3433
3434        tasklet_init(&il->irq_tasklet,
3435                     (void (*)(unsigned long))il3945_irq_tasklet,
3436                     (unsigned long)il);
3437}
3438
3439static void
3440il3945_cancel_deferred_work(struct il_priv *il)
3441{
3442        il3945_hw_cancel_deferred_work(il);
3443
3444        cancel_delayed_work_sync(&il->init_alive_start);
3445        cancel_delayed_work(&il->alive_start);
3446
3447        il_cancel_scan_deferred_work(il);
3448}
3449
3450static struct attribute *il3945_sysfs_entries[] = {
3451        &dev_attr_antenna.attr,
3452        &dev_attr_channels.attr,
3453        &dev_attr_dump_errors.attr,
3454        &dev_attr_flags.attr,
3455        &dev_attr_filter_flags.attr,
3456        &dev_attr_measurement.attr,
3457        &dev_attr_retry_rate.attr,
3458        &dev_attr_status.attr,
3459        &dev_attr_temperature.attr,
3460        &dev_attr_tx_power.attr,
3461#ifdef CONFIG_IWLEGACY_DEBUG
3462        &dev_attr_debug_level.attr,
3463#endif
3464        NULL
3465};
3466
3467static struct attribute_group il3945_attribute_group = {
3468        .name = NULL,           /* put in device directory */
3469        .attrs = il3945_sysfs_entries,
3470};
3471
3472static struct ieee80211_ops il3945_mac_ops __read_mostly = {
3473        .tx = il3945_mac_tx,
3474        .start = il3945_mac_start,
3475        .stop = il3945_mac_stop,
3476        .add_interface = il_mac_add_interface,
3477        .remove_interface = il_mac_remove_interface,
3478        .change_interface = il_mac_change_interface,
3479        .config = il_mac_config,
3480        .configure_filter = il3945_configure_filter,
3481        .set_key = il3945_mac_set_key,
3482        .conf_tx = il_mac_conf_tx,
3483        .reset_tsf = il_mac_reset_tsf,
3484        .bss_info_changed = il_mac_bss_info_changed,
3485        .hw_scan = il_mac_hw_scan,
3486        .sta_add = il3945_mac_sta_add,
3487        .sta_remove = il_mac_sta_remove,
3488        .tx_last_beacon = il_mac_tx_last_beacon,
3489        .flush = il_mac_flush,
3490};
3491
3492static int
3493il3945_init_drv(struct il_priv *il)
3494{
3495        int ret;
3496        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3497
3498        il->retry_rate = 1;
3499        il->beacon_skb = NULL;
3500
3501        spin_lock_init(&il->sta_lock);
3502        spin_lock_init(&il->hcmd_lock);
3503
3504        INIT_LIST_HEAD(&il->free_frames);
3505
3506        mutex_init(&il->mutex);
3507
3508        il->ieee_channels = NULL;
3509        il->ieee_rates = NULL;
3510        il->band = IEEE80211_BAND_2GHZ;
3511
3512        il->iw_mode = NL80211_IFTYPE_STATION;
3513        il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3514
3515        /* initialize force reset */
3516        il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3517
3518        if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3519                IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3520                        eeprom->version);
3521                ret = -EINVAL;
3522                goto err;
3523        }
3524        ret = il_init_channel_map(il);
3525        if (ret) {
3526                IL_ERR("initializing regulatory failed: %d\n", ret);
3527                goto err;
3528        }
3529
3530        /* Set up txpower settings in driver for all channels */
3531        if (il3945_txpower_set_from_eeprom(il)) {
3532                ret = -EIO;
3533                goto err_free_channel_map;
3534        }
3535
3536        ret = il_init_geos(il);
3537        if (ret) {
3538                IL_ERR("initializing geos failed: %d\n", ret);
3539                goto err_free_channel_map;
3540        }
3541        il3945_init_hw_rates(il, il->ieee_rates);
3542
3543        return 0;
3544
3545err_free_channel_map:
3546        il_free_channel_map(il);
3547err:
3548        return ret;
3549}
3550
3551#define IL3945_MAX_PROBE_REQUEST        200
3552
3553static int
3554il3945_setup_mac(struct il_priv *il)
3555{
3556        int ret;
3557        struct ieee80211_hw *hw = il->hw;
3558
3559        hw->rate_control_algorithm = "iwl-3945-rs";
3560        hw->sta_data_size = sizeof(struct il3945_sta_priv);
3561        hw->vif_data_size = sizeof(struct il_vif_priv);
3562
3563        /* Tell mac80211 our characteristics */
3564        ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
3565        ieee80211_hw_set(hw, SUPPORTS_PS);
3566        ieee80211_hw_set(hw, SIGNAL_DBM);
3567        ieee80211_hw_set(hw, SPECTRUM_MGMT);
3568
3569        hw->wiphy->interface_modes =
3570            BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3571
3572        hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
3573        hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
3574                                       REGULATORY_DISABLE_BEACON_HINTS;
3575
3576        hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
3577
3578        hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3579        /* we create the 802.11 header and a zero-length SSID element */
3580        hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3581
3582        /* Default value; 4 EDCA QOS priorities */
3583        hw->queues = 4;
3584
3585        if (il->bands[IEEE80211_BAND_2GHZ].n_channels)
3586                il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3587                    &il->bands[IEEE80211_BAND_2GHZ];
3588
3589        if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
3590                il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3591                    &il->bands[IEEE80211_BAND_5GHZ];
3592
3593        il_leds_init(il);
3594
3595        ret = ieee80211_register_hw(il->hw);
3596        if (ret) {
3597                IL_ERR("Failed to register hw (error %d)\n", ret);
3598                return ret;
3599        }
3600        il->mac80211_registered = 1;
3601
3602        return 0;
3603}
3604
3605static int
3606il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3607{
3608        int err = 0;
3609        struct il_priv *il;
3610        struct ieee80211_hw *hw;
3611        struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3612        struct il3945_eeprom *eeprom;
3613        unsigned long flags;
3614
3615        /***********************
3616         * 1. Allocating HW data
3617         * ********************/
3618
3619        hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3620        if (!hw) {
3621                err = -ENOMEM;
3622                goto out;
3623        }
3624        il = hw->priv;
3625        il->hw = hw;
3626        SET_IEEE80211_DEV(hw, &pdev->dev);
3627
3628        il->cmd_queue = IL39_CMD_QUEUE_NUM;
3629
3630        /*
3631         * Disabling hardware scan means that mac80211 will perform scans
3632         * "the hard way", rather than using device's scan.
3633         */
3634        if (il3945_mod_params.disable_hw_scan) {
3635                D_INFO("Disabling hw_scan\n");
3636                il3945_mac_ops.hw_scan = NULL;
3637        }
3638
3639        D_INFO("*** LOAD DRIVER ***\n");
3640        il->cfg = cfg;
3641        il->ops = &il3945_ops;
3642#ifdef CONFIG_IWLEGACY_DEBUGFS
3643        il->debugfs_ops = &il3945_debugfs_ops;
3644#endif
3645        il->pci_dev = pdev;
3646        il->inta_mask = CSR_INI_SET_MASK;
3647
3648        /***************************
3649         * 2. Initializing PCI bus
3650         * *************************/
3651        pci_disable_link_state(pdev,
3652                               PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3653                               PCIE_LINK_STATE_CLKPM);
3654
3655        if (pci_enable_device(pdev)) {
3656                err = -ENODEV;
3657                goto out_ieee80211_free_hw;
3658        }
3659
3660        pci_set_master(pdev);
3661
3662        err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3663        if (!err)
3664                err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3665        if (err) {
3666                IL_WARN("No suitable DMA available.\n");
3667                goto out_pci_disable_device;
3668        }
3669
3670        pci_set_drvdata(pdev, il);
3671        err = pci_request_regions(pdev, DRV_NAME);
3672        if (err)
3673                goto out_pci_disable_device;
3674
3675        /***********************
3676         * 3. Read REV Register
3677         * ********************/
3678        il->hw_base = pci_ioremap_bar(pdev, 0);
3679        if (!il->hw_base) {
3680                err = -ENODEV;
3681                goto out_pci_release_regions;
3682        }
3683
3684        D_INFO("pci_resource_len = 0x%08llx\n",
3685               (unsigned long long)pci_resource_len(pdev, 0));
3686        D_INFO("pci_resource_base = %p\n", il->hw_base);
3687
3688        /* We disable the RETRY_TIMEOUT register (0x41) to keep
3689         * PCI Tx retries from interfering with C3 CPU state */
3690        pci_write_config_byte(pdev, 0x41, 0x00);
3691
3692        /* these spin locks will be used in apm_init and EEPROM access
3693         * we should init now
3694         */
3695        spin_lock_init(&il->reg_lock);
3696        spin_lock_init(&il->lock);
3697
3698        /*
3699         * stop and reset the on-board processor just in case it is in a
3700         * strange state ... like being left stranded by a primary kernel
3701         * and this is now the kdump kernel trying to start up
3702         */
3703        _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3704
3705        /***********************
3706         * 4. Read EEPROM
3707         * ********************/
3708
3709        /* Read the EEPROM */
3710        err = il_eeprom_init(il);
3711        if (err) {
3712                IL_ERR("Unable to init EEPROM\n");
3713                goto out_iounmap;
3714        }
3715        /* MAC Address location in EEPROM same for 3945/4965 */
3716        eeprom = (struct il3945_eeprom *)il->eeprom;
3717        D_INFO("MAC address: %pM\n", eeprom->mac_address);
3718        SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3719
3720        /***********************
3721         * 5. Setup HW Constants
3722         * ********************/
3723        /* Device-specific setup */
3724        err = il3945_hw_set_hw_params(il);
3725        if (err) {
3726                IL_ERR("failed to set hw settings\n");
3727                goto out_eeprom_free;
3728        }
3729
3730        /***********************
3731         * 6. Setup il
3732         * ********************/
3733
3734        err = il3945_init_drv(il);
3735        if (err) {
3736                IL_ERR("initializing driver failed\n");
3737                goto out_unset_hw_params;
3738        }
3739
3740        IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3741
3742        /***********************
3743         * 7. Setup Services
3744         * ********************/
3745
3746        spin_lock_irqsave(&il->lock, flags);
3747        il_disable_interrupts(il);
3748        spin_unlock_irqrestore(&il->lock, flags);
3749
3750        pci_enable_msi(il->pci_dev);
3751
3752        err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3753        if (err) {
3754                IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3755                goto out_disable_msi;
3756        }
3757
3758        err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3759        if (err) {
3760                IL_ERR("failed to create sysfs device attributes\n");
3761                goto out_release_irq;
3762        }
3763
3764        il_set_rxon_channel(il, &il->bands[IEEE80211_BAND_2GHZ].channels[5]);
3765        il3945_setup_deferred_work(il);
3766        il3945_setup_handlers(il);
3767        il_power_initialize(il);
3768
3769        /*********************************
3770         * 8. Setup and Register mac80211
3771         * *******************************/
3772
3773        il_enable_interrupts(il);
3774
3775        err = il3945_setup_mac(il);
3776        if (err)
3777                goto out_remove_sysfs;
3778
3779        err = il_dbgfs_register(il, DRV_NAME);
3780        if (err)
3781                IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
3782                       err);
3783
3784        /* Start monitoring the killswitch */
3785        queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3786
3787        return 0;
3788
3789out_remove_sysfs:
3790        destroy_workqueue(il->workqueue);
3791        il->workqueue = NULL;
3792        sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3793out_release_irq:
3794        free_irq(il->pci_dev->irq, il);
3795out_disable_msi:
3796        pci_disable_msi(il->pci_dev);
3797        il_free_geos(il);
3798        il_free_channel_map(il);
3799out_unset_hw_params:
3800        il3945_unset_hw_params(il);
3801out_eeprom_free:
3802        il_eeprom_free(il);
3803out_iounmap:
3804        iounmap(il->hw_base);
3805out_pci_release_regions:
3806        pci_release_regions(pdev);
3807out_pci_disable_device:
3808        pci_disable_device(pdev);
3809out_ieee80211_free_hw:
3810        ieee80211_free_hw(il->hw);
3811out:
3812        return err;
3813}
3814
3815static void
3816il3945_pci_remove(struct pci_dev *pdev)
3817{
3818        struct il_priv *il = pci_get_drvdata(pdev);
3819        unsigned long flags;
3820
3821        if (!il)
3822                return;
3823
3824        D_INFO("*** UNLOAD DRIVER ***\n");
3825
3826        il_dbgfs_unregister(il);
3827
3828        set_bit(S_EXIT_PENDING, &il->status);
3829
3830        il_leds_exit(il);
3831
3832        if (il->mac80211_registered) {
3833                ieee80211_unregister_hw(il->hw);
3834                il->mac80211_registered = 0;
3835        } else {
3836                il3945_down(il);
3837        }
3838
3839        /*
3840         * Make sure device is reset to low power before unloading driver.
3841         * This may be redundant with il_down(), but there are paths to
3842         * run il_down() without calling apm_ops.stop(), and there are
3843         * paths to avoid running il_down() at all before leaving driver.
3844         * This (inexpensive) call *makes sure* device is reset.
3845         */
3846        il_apm_stop(il);
3847
3848        /* make sure we flush any pending irq or
3849         * tasklet for the driver
3850         */
3851        spin_lock_irqsave(&il->lock, flags);
3852        il_disable_interrupts(il);
3853        spin_unlock_irqrestore(&il->lock, flags);
3854
3855        il3945_synchronize_irq(il);
3856
3857        sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3858
3859        cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3860
3861        il3945_dealloc_ucode_pci(il);
3862
3863        if (il->rxq.bd)
3864                il3945_rx_queue_free(il, &il->rxq);
3865        il3945_hw_txq_ctx_free(il);
3866
3867        il3945_unset_hw_params(il);
3868
3869        /*netif_stop_queue(dev); */
3870        flush_workqueue(il->workqueue);
3871
3872        /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3873         * il->workqueue... so we can't take down the workqueue
3874         * until now... */
3875        destroy_workqueue(il->workqueue);
3876        il->workqueue = NULL;
3877
3878        free_irq(pdev->irq, il);
3879        pci_disable_msi(pdev);
3880
3881        iounmap(il->hw_base);
3882        pci_release_regions(pdev);
3883        pci_disable_device(pdev);
3884
3885        il_free_channel_map(il);
3886        il_free_geos(il);
3887        kfree(il->scan_cmd);
3888        if (il->beacon_skb)
3889                dev_kfree_skb(il->beacon_skb);
3890
3891        ieee80211_free_hw(il->hw);
3892}
3893
3894/*****************************************************************************
3895 *
3896 * driver and module entry point
3897 *
3898 *****************************************************************************/
3899
3900static struct pci_driver il3945_driver = {
3901        .name = DRV_NAME,
3902        .id_table = il3945_hw_card_ids,
3903        .probe = il3945_pci_probe,
3904        .remove = il3945_pci_remove,
3905        .driver.pm = IL_LEGACY_PM_OPS,
3906};
3907
3908static int __init
3909il3945_init(void)
3910{
3911
3912        int ret;
3913        pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3914        pr_info(DRV_COPYRIGHT "\n");
3915
3916        ret = il3945_rate_control_register();
3917        if (ret) {
3918                pr_err("Unable to register rate control algorithm: %d\n", ret);
3919                return ret;
3920        }
3921
3922        ret = pci_register_driver(&il3945_driver);
3923        if (ret) {
3924                pr_err("Unable to initialize PCI module\n");
3925                goto error_register;
3926        }
3927
3928        return ret;
3929
3930error_register:
3931        il3945_rate_control_unregister();
3932        return ret;
3933}
3934
3935static void __exit
3936il3945_exit(void)
3937{
3938        pci_unregister_driver(&il3945_driver);
3939        il3945_rate_control_unregister();
3940}
3941
3942MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3943
3944module_param_named(antenna, il3945_mod_params.antenna, int, S_IRUGO);
3945MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3946module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, S_IRUGO);
3947MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3948module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3949                   S_IRUGO);
3950MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3951#ifdef CONFIG_IWLEGACY_DEBUG
3952module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
3953MODULE_PARM_DESC(debug, "debug output mask");
3954#endif
3955module_param_named(fw_restart, il3945_mod_params.restart_fw, int, S_IRUGO);
3956MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3957
3958module_exit(il3945_exit);
3959module_init(il3945_init);
3960