drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 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 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/slab.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/sched.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/wireless.h>
  41 #include <linux/firmware.h>
  42 #include <linux/etherdevice.h>
  43 #include <linux/if_arp.h>
  44
  45 #include <net/ieee80211_radiotap.h>
  46 #include <net/mac80211.h>
  47
  48 #include <asm/div64.h>
  49
  50 #define DRV_NAME        "iwl3945"
  51
  52 #include "iwl-fh.h"
  53 #include "iwl-3945-fh.h"
  54 #include "iwl-commands.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-3945.h"
  57 #include "iwl-core.h"
  58 #include "iwl-helpers.h"
  59 #include "iwl-dev.h"
  60 #include "iwl-spectrum.h"
  61
  62 /*
  63  * module name, copyright, version, etc.
  64  */
  65
  66 #define DRV_DESCRIPTION \
  67 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 /*
  76  * add "s" to indicate spectrum measurement included.
  77  * we add it here to be consistent with previous releases in which
  78  * this was configurable.
  79  */
  80 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  81 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  82 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88
  89  /* module parameters */
  90 struct iwl_mod_params iwl3945_mod_params = {
  91         .sw_crypto = 1,
  92         .restart_fw = 1,
  93         /* the rest are 0 by default */
  94 };
  95
  96 /**
  97  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  98  * @priv: eeprom and antenna fields are used to determine antenna flags
  99  *
 100  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 101  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 102  *
 103  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 104  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 105  * IWL_ANTENNA_AUX       - Force AUX antenna
 106  */
 107 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 108 {
 109         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 110
 111         switch (iwl3945_mod_params.antenna) {
 112         case IWL_ANTENNA_DIVERSITY:
 113                 return 0;
 114
 115         case IWL_ANTENNA_MAIN:
 116                 if (eeprom->antenna_switch_type)
 117                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 118                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 119
 120         case IWL_ANTENNA_AUX:
 121                 if (eeprom->antenna_switch_type)
 122                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 123                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 124         }
 125
 126         /* bad antenna selector value */
 127         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 128                 iwl3945_mod_params.antenna);
 129
 130         return 0;               /* "diversity" is default if error */
 131 }
 132
 133 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 134                                    struct ieee80211_key_conf *keyconf,
 135                                    u8 sta_id)
 136 {
 137         unsigned long flags;
 138         __le16 key_flags = 0;
 139         int ret;
 140
 141         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 142         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 143
 144         if (sta_id == priv->hw_params.bcast_sta_id)
 145                 key_flags |= STA_KEY_MULTICAST_MSK;
 146
 147         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 148         keyconf->hw_key_idx = keyconf->keyidx;
 149         key_flags &= ~STA_KEY_FLG_INVALID;
 150
 151         spin_lock_irqsave(&priv->sta_lock, flags);
 152         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 153         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 154         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 155                keyconf->keylen);
 156
 157         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 161                         == STA_KEY_FLG_NO_ENC)
 162                 priv->stations[sta_id].sta.key.key_offset =
 163                                  iwl_get_free_ucode_key_index(priv);
 164         /* else, we are overriding an existing key => no need to allocated room
 165         * in uCode. */
 166
 167         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 168                 "no space for a new key");
 169
 170         priv->stations[sta_id].sta.key.key_flags = key_flags;
 171         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 172         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 173
 174         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 175
 176         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 177
 178         spin_unlock_irqrestore(&priv->sta_lock, flags);
 179
 180         return ret;
 181 }
 182
 183 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 184                                   struct ieee80211_key_conf *keyconf,
 185                                   u8 sta_id)
 186 {
 187         return -EOPNOTSUPP;
 188 }
 189
 190 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 191                                   struct ieee80211_key_conf *keyconf,
 192                                   u8 sta_id)
 193 {
 194         return -EOPNOTSUPP;
 195 }
 196
 197 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 198 {
 199         unsigned long flags;
 200
 201         spin_lock_irqsave(&priv->sta_lock, flags);
 202         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 203         memset(&priv->stations[sta_id].sta.key, 0,
 204                 sizeof(struct iwl4965_keyinfo));
 205         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 206         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 207         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 208         spin_unlock_irqrestore(&priv->sta_lock, flags);
 209
 210         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 211         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 212         return 0;
 213 }
 214
 215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 216                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 217 {
 218         int ret = 0;
 219
 220         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 221
 222         switch (keyconf->alg) {
 223         case ALG_CCMP:
 224                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 225                 break;
 226         case ALG_TKIP:
 227                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 228                 break;
 229         case ALG_WEP:
 230                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         default:
 233                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 234                 ret = -EINVAL;
 235         }
 236
 237         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 238                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 239                       sta_id, ret);
 240
 241         return ret;
 242 }
 243
 244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 245 {
 246         int ret = -EOPNOTSUPP;
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_set_static_key(struct iwl_priv *priv,
 252                                 struct ieee80211_key_conf *key)
 253 {
 254         if (key->alg == ALG_WEP)
 255                 return -EOPNOTSUPP;
 256
 257         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 258         return -EINVAL;
 259 }
 260
 261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 262 {
 263         struct list_head *element;
 264
 265         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 266                        priv->frames_count);
 267
 268         while (!list_empty(&priv->free_frames)) {
 269                 element = priv->free_frames.next;
 270                 list_del(element);
 271                 kfree(list_entry(element, struct iwl3945_frame, list));
 272                 priv->frames_count--;
 273         }
 274
 275         if (priv->frames_count) {
 276                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 277                             priv->frames_count);
 278                 priv->frames_count = 0;
 279         }
 280 }
 281
 282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 283 {
 284         struct iwl3945_frame *frame;
 285         struct list_head *element;
 286         if (list_empty(&priv->free_frames)) {
 287                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 288                 if (!frame) {
 289                         IWL_ERR(priv, "Could not allocate frame!\n");
 290                         return NULL;
 291                 }
 292
 293                 priv->frames_count++;
 294                 return frame;
 295         }
 296
 297         element = priv->free_frames.next;
 298         list_del(element);
 299         return list_entry(element, struct iwl3945_frame, list);
 300 }
 301
 302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 303 {
 304         memset(frame, 0, sizeof(*frame));
 305         list_add(&frame->list, &priv->free_frames);
 306 }
 307
 308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 309                                 struct ieee80211_hdr *hdr,
 310                                 int left)
 311 {
 312
 313         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 314             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 315              (priv->iw_mode != NL80211_IFTYPE_AP)))
 316                 return 0;
 317
 318         if (priv->ibss_beacon->len > left)
 319                 return 0;
 320
 321         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 322
 323         return priv->ibss_beacon->len;
 324 }
 325
 326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 327 {
 328         struct iwl3945_frame *frame;
 329         unsigned int frame_size;
 330         int rc;
 331         u8 rate;
 332
 333         frame = iwl3945_get_free_frame(priv);
 334
 335         if (!frame) {
 336                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 337                           "command.\n");
 338                 return -ENOMEM;
 339         }
 340
 341         rate = iwl_rate_get_lowest_plcp(priv);
 342
 343         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 344
 345         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 346                               &frame->u.cmd[0]);
 347
 348         iwl3945_free_frame(priv, frame);
 349
 350         return rc;
 351 }
 352
 353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 354 {
 355         if (priv->_3945.shared_virt)
 356                 dma_free_coherent(&priv->pci_dev->dev,
 357                                   sizeof(struct iwl3945_shared),
 358                                   priv->_3945.shared_virt,
 359                                   priv->_3945.shared_phys);
 360 }
 361
 362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 363                                       struct ieee80211_tx_info *info,
 364                                       struct iwl_device_cmd *cmd,
 365                                       struct sk_buff *skb_frag,
 366                                       int sta_id)
 367 {
 368         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 369         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 370
 371         switch (keyinfo->alg) {
 372         case ALG_CCMP:
 373                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 374                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 375                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 376                 break;
 377
 378         case ALG_TKIP:
 379                 break;
 380
 381         case ALG_WEP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 383                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 384
 385                 if (keyinfo->keylen == 13)
 386                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 387
 388                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 389
 390                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 391                              "with key %d\n", info->control.hw_key->hw_key_idx);
 392                 break;
 393
 394         default:
 395                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 396                 break;
 397         }
 398 }
 399
 400 /*
 401  * handle build REPLY_TX command notification.
 402  */
 403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 404                                   struct iwl_device_cmd *cmd,
 405                                   struct ieee80211_tx_info *info,
 406                                   struct ieee80211_hdr *hdr, u8 std_id)
 407 {
 408         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 409         __le32 tx_flags = tx_cmd->tx_flags;
 410         __le16 fc = hdr->frame_control;
 411
 412         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 413         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 414                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 415                 if (ieee80211_is_mgmt(fc))
 416                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 417                 if (ieee80211_is_probe_resp(fc) &&
 418                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 419                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 420         } else {
 421                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 422                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 423         }
 424
 425         tx_cmd->sta_id = std_id;
 426         if (ieee80211_has_morefrags(fc))
 427                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 428
 429         if (ieee80211_is_data_qos(fc)) {
 430                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 431                 tx_cmd->tid_tspec = qc[0] & 0xf;
 432                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 433         } else {
 434                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 435         }
 436
 437         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 438
 439         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 440                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 441
 442         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 443         if (ieee80211_is_mgmt(fc)) {
 444                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 445                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 446                 else
 447                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 448         } else {
 449                 tx_cmd->timeout.pm_frame_timeout = 0;
 450         }
 451
 452         tx_cmd->driver_txop = 0;
 453         tx_cmd->tx_flags = tx_flags;
 454         tx_cmd->next_frame_len = 0;
 455 }
 456
 457 /*
 458  * start REPLY_TX command process
 459  */
 460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 461 {
 462         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 463         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 464         struct iwl3945_tx_cmd *tx_cmd;
 465         struct iwl_tx_queue *txq = NULL;
 466         struct iwl_queue *q = NULL;
 467         struct iwl_device_cmd *out_cmd;
 468         struct iwl_cmd_meta *out_meta;
 469         dma_addr_t phys_addr;
 470         dma_addr_t txcmd_phys;
 471         int txq_id = skb_get_queue_mapping(skb);
 472         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 473         u8 id;
 474         u8 unicast;
 475         u8 sta_id;
 476         u8 tid = 0;
 477         u16 seq_number = 0;
 478         __le16 fc;
 479         u8 wait_write_ptr = 0;
 480         u8 *qc = NULL;
 481         unsigned long flags;
 482
 483         spin_lock_irqsave(&priv->lock, flags);
 484         if (iwl_is_rfkill(priv)) {
 485                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 486                 goto drop_unlock;
 487         }
 488
 489         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 490                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 491                 goto drop_unlock;
 492         }
 493
 494         unicast = !is_multicast_ether_addr(hdr->addr1);
 495         id = 0;
 496
 497         fc = hdr->frame_control;
 498
 499 #ifdef CONFIG_IWLWIFI_DEBUG
 500         if (ieee80211_is_auth(fc))
 501                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 502         else if (ieee80211_is_assoc_req(fc))
 503                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 504         else if (ieee80211_is_reassoc_req(fc))
 505                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 506 #endif
 507
 508         spin_unlock_irqrestore(&priv->lock, flags);
 509
 510         hdr_len = ieee80211_hdrlen(fc);
 511
 512         /* Find index into station table for destination station */
 513         if (!info->control.sta)
 514                 sta_id = priv->hw_params.bcast_sta_id;
 515         else
 516                 sta_id = iwl_sta_id(info->control.sta);
 517         if (sta_id == IWL_INVALID_STATION) {
 518                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 519                                hdr->addr1);
 520                 goto drop;
 521         }
 522
 523         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 524
 525         if (ieee80211_is_data_qos(fc)) {
 526                 qc = ieee80211_get_qos_ctl(hdr);
 527                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 528                 if (unlikely(tid >= MAX_TID_COUNT))
 529                         goto drop;
 530                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 531                                 IEEE80211_SCTL_SEQ;
 532                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 533                         (hdr->seq_ctrl &
 534                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 535                 seq_number += 0x10;
 536         }
 537
 538         /* Descriptor for chosen Tx queue */
 539         txq = &priv->txq[txq_id];
 540         q = &txq->q;
 541
 542         if ((iwl_queue_space(q) < q->high_mark))
 543                 goto drop;
 544
 545         spin_lock_irqsave(&priv->lock, flags);
 546
 547         idx = get_cmd_index(q, q->write_ptr, 0);
 548
 549         /* Set up driver data for this TFD */
 550         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 551         txq->txb[q->write_ptr].skb[0] = skb;
 552
 553         /* Init first empty entry in queue's array of Tx/cmd buffers */
 554         out_cmd = txq->cmd[idx];
 555         out_meta = &txq->meta[idx];
 556         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 557         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 558         memset(tx_cmd, 0, sizeof(*tx_cmd));
 559
 560         /*
 561          * Set up the Tx-command (not MAC!) header.
 562          * Store the chosen Tx queue and TFD index within the sequence field;
 563          * after Tx, uCode's Tx response will return this value so driver can
 564          * locate the frame within the tx queue and do post-tx processing.
 565          */
 566         out_cmd->hdr.cmd = REPLY_TX;
 567         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 568                                 INDEX_TO_SEQ(q->write_ptr)));
 569
 570         /* Copy MAC header from skb into command buffer */
 571         memcpy(tx_cmd->hdr, hdr, hdr_len);
 572
 573
 574         if (info->control.hw_key)
 575                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 576
 577         /* TODO need this for burst mode later on */
 578         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 579
 580         /* set is_hcca to 0; it probably will never be implemented */
 581         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 582
 583         /* Total # bytes to be transmitted */
 584         len = (u16)skb->len;
 585         tx_cmd->len = cpu_to_le16(len);
 586
 587         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 588         iwl_update_stats(priv, true, fc, len);
 589         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 590         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 591
 592         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 593                 txq->need_update = 1;
 594                 if (qc)
 595                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 596         } else {
 597                 wait_write_ptr = 1;
 598                 txq->need_update = 0;
 599         }
 600
 601         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 602                      le16_to_cpu(out_cmd->hdr.sequence));
 603         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 604         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 605         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 606                            ieee80211_hdrlen(fc));
 607
 608         /*
 609          * Use the first empty entry in this queue's command buffer array
 610          * to contain the Tx command and MAC header concatenated together
 611          * (payload data will be in another buffer).
 612          * Size of this varies, due to varying MAC header length.
 613          * If end is not dword aligned, we'll have 2 extra bytes at the end
 614          * of the MAC header (device reads on dword boundaries).
 615          * We'll tell device about this padding later.
 616          */
 617         len = sizeof(struct iwl3945_tx_cmd) +
 618                         sizeof(struct iwl_cmd_header) + hdr_len;
 619
 620         len_org = len;
 621         len = (len + 3) & ~3;
 622
 623         if (len_org != len)
 624                 len_org = 1;
 625         else
 626                 len_org = 0;
 627
 628         /* Physical address of this Tx command's header (not MAC header!),
 629          * within command buffer array. */
 630         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 631                                     len, PCI_DMA_TODEVICE);
 632         /* we do not map meta data ... so we can safely access address to
 633          * provide to unmap command*/
 634         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 635         pci_unmap_len_set(out_meta, len, len);
 636
 637         /* Add buffer containing Tx command and MAC(!) header to TFD's
 638          * first entry */
 639         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 640                                                    txcmd_phys, len, 1, 0);
 641
 642
 643         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 644          * if any (802.11 null frames have no payload). */
 645         len = skb->len - hdr_len;
 646         if (len) {
 647                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 648                                            len, PCI_DMA_TODEVICE);
 649                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 650                                                            phys_addr, len,
 651                                                            0, U32_PAD(len));
 652         }
 653
 654
 655         /* Tell device the write index *just past* this latest filled TFD */
 656         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 657         iwl_txq_update_write_ptr(priv, txq);
 658         spin_unlock_irqrestore(&priv->lock, flags);
 659
 660         if ((iwl_queue_space(q) < q->high_mark)
 661             && priv->mac80211_registered) {
 662                 if (wait_write_ptr) {
 663                         spin_lock_irqsave(&priv->lock, flags);
 664                         txq->need_update = 1;
 665                         iwl_txq_update_write_ptr(priv, txq);
 666                         spin_unlock_irqrestore(&priv->lock, flags);
 667                 }
 668
 669                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 670         }
 671
 672         return 0;
 673
 674 drop_unlock:
 675         spin_unlock_irqrestore(&priv->lock, flags);
 676 drop:
 677         return -1;
 678 }
 679
 680 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 681 #define BEACON_TIME_MASK_HIGH   0xFF000000
 682 #define TIME_UNIT               1024
 683
 684 /*
 685  * extended beacon time format
 686  * time in usec will be changed into a 32-bit value in 8:24 format
 687  * the high 1 byte is the beacon counts
 688  * the lower 3 bytes is the time in usec within one beacon interval
 689  */
 690
 691 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 692 {
 693         u32 quot;
 694         u32 rem;
 695         u32 interval = beacon_interval * 1024;
 696
 697         if (!interval || !usec)
 698                 return 0;
 699
 700         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 701         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 702
 703         return (quot << 24) + rem;
 704 }
 705
 706 /* base is usually what we get from ucode with each received frame,
 707  * the same as HW timer counter counting down
 708  */
 709
 710 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 711 {
 712         u32 base_low = base & BEACON_TIME_MASK_LOW;
 713         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 714         u32 interval = beacon_interval * TIME_UNIT;
 715         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 716             (addon & BEACON_TIME_MASK_HIGH);
 717
 718         if (base_low > addon_low)
 719                 res += base_low - addon_low;
 720         else if (base_low < addon_low) {
 721                 res += interval + base_low - addon_low;
 722                 res += (1 << 24);
 723         } else
 724                 res += (1 << 24);
 725
 726         return cpu_to_le32(res);
 727 }
 728
 729 static int iwl3945_get_measurement(struct iwl_priv *priv,
 730                                struct ieee80211_measurement_params *params,
 731                                u8 type)
 732 {
 733         struct iwl_spectrum_cmd spectrum;
 734         struct iwl_rx_packet *pkt;
 735         struct iwl_host_cmd cmd = {
 736                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 737                 .data = (void *)&spectrum,
 738                 .flags = CMD_WANT_SKB,
 739         };
 740         u32 add_time = le64_to_cpu(params->start_time);
 741         int rc;
 742         int spectrum_resp_status;
 743         int duration = le16_to_cpu(params->duration);
 744
 745         if (iwl_is_associated(priv))
 746                 add_time =
 747                     iwl3945_usecs_to_beacons(
 748                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 749                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 750
 751         memset(&spectrum, 0, sizeof(spectrum));
 752
 753         spectrum.channel_count = cpu_to_le16(1);
 754         spectrum.flags =
 755             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 756         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 757         cmd.len = sizeof(spectrum);
 758         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 759
 760         if (iwl_is_associated(priv))
 761                 spectrum.start_time =
 762                     iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
 763                                 add_time,
 764                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 765         else
 766                 spectrum.start_time = 0;
 767
 768         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 769         spectrum.channels[0].channel = params->channel;
 770         spectrum.channels[0].type = type;
 771         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 772                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 773                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 774
 775         rc = iwl_send_cmd_sync(priv, &cmd);
 776         if (rc)
 777                 return rc;
 778
 779         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 780         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 781                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 782                 rc = -EIO;
 783         }
 784
 785         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 786         switch (spectrum_resp_status) {
 787         case 0:         /* Command will be handled */
 788                 if (pkt->u.spectrum.id != 0xff) {
 789                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 790                                                 pkt->u.spectrum.id);
 791                         priv->measurement_status &= ~MEASUREMENT_READY;
 792                 }
 793                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 794                 rc = 0;
 795                 break;
 796
 797         case 1:         /* Command will not be handled */
 798                 rc = -EAGAIN;
 799                 break;
 800         }
 801
 802         iwl_free_pages(priv, cmd.reply_page);
 803
 804         return rc;
 805 }
 806
 807 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 808                                struct iwl_rx_mem_buffer *rxb)
 809 {
 810         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 811         struct iwl_alive_resp *palive;
 812         struct delayed_work *pwork;
 813
 814         palive = &pkt->u.alive_frame;
 815
 816         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 817                        "0x%01X 0x%01X\n",
 818                        palive->is_valid, palive->ver_type,
 819                        palive->ver_subtype);
 820
 821         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 822                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 823                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 824                        sizeof(struct iwl_alive_resp));
 825                 pwork = &priv->init_alive_start;
 826         } else {
 827                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 828                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 829                        sizeof(struct iwl_alive_resp));
 830                 pwork = &priv->alive_start;
 831                 iwl3945_disable_events(priv);
 832         }
 833
 834         /* We delay the ALIVE response by 5ms to
 835          * give the HW RF Kill time to activate... */
 836         if (palive->is_valid == UCODE_VALID_OK)
 837                 queue_delayed_work(priv->workqueue, pwork,
 838                                    msecs_to_jiffies(5));
 839         else
 840                 IWL_WARN(priv, "uCode did not respond OK.\n");
 841 }
 842
 843 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 844                                  struct iwl_rx_mem_buffer *rxb)
 845 {
 846 #ifdef CONFIG_IWLWIFI_DEBUG
 847         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 848 #endif
 849
 850         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 851         return;
 852 }
 853
 854 static void iwl3945_bg_beacon_update(struct work_struct *work)
 855 {
 856         struct iwl_priv *priv =
 857                 container_of(work, struct iwl_priv, beacon_update);
 858         struct sk_buff *beacon;
 859
 860         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 861         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 862
 863         if (!beacon) {
 864                 IWL_ERR(priv, "update beacon failed\n");
 865                 return;
 866         }
 867
 868         mutex_lock(&priv->mutex);
 869         /* new beacon skb is allocated every time; dispose previous.*/
 870         if (priv->ibss_beacon)
 871                 dev_kfree_skb(priv->ibss_beacon);
 872
 873         priv->ibss_beacon = beacon;
 874         mutex_unlock(&priv->mutex);
 875
 876         iwl3945_send_beacon_cmd(priv);
 877 }
 878
 879 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 880                                 struct iwl_rx_mem_buffer *rxb)
 881 {
 882 #ifdef CONFIG_IWLWIFI_DEBUG
 883         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 884         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 885         u8 rate = beacon->beacon_notify_hdr.rate;
 886
 887         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 888                 "tsf %d %d rate %d\n",
 889                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 890                 beacon->beacon_notify_hdr.failure_frame,
 891                 le32_to_cpu(beacon->ibss_mgr_status),
 892                 le32_to_cpu(beacon->high_tsf),
 893                 le32_to_cpu(beacon->low_tsf), rate);
 894 #endif
 895
 896         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 897             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 898                 queue_work(priv->workqueue, &priv->beacon_update);
 899 }
 900
 901 /* Handle notification from uCode that card's power state is changing
 902  * due to software, hardware, or critical temperature RFKILL */
 903 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 904                                     struct iwl_rx_mem_buffer *rxb)
 905 {
 906         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 907         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 908         unsigned long status = priv->status;
 909
 910         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 911                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 912                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 913
 914         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 915                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 916
 917         if (flags & HW_CARD_DISABLED)
 918                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 919         else
 920                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 921
 922
 923         iwl_scan_cancel(priv);
 924
 925         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 926              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 927                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 928                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 929         else
 930                 wake_up_interruptible(&priv->wait_command_queue);
 931 }
 932
 933 /**
 934  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 935  *
 936  * Setup the RX handlers for each of the reply types sent from the uCode
 937  * to the host.
 938  *
 939  * This function chains into the hardware specific files for them to setup
 940  * any hardware specific handlers as well.
 941  */
 942 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 943 {
 944         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 945         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 946         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 947         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 948         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 949                         iwl_rx_spectrum_measure_notif;
 950         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 951         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 952             iwl_rx_pm_debug_statistics_notif;
 953         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 954
 955         /*
 956          * The same handler is used for both the REPLY to a discrete
 957          * statistics request from the host as well as for the periodic
 958          * statistics notifications (after received beacons) from the uCode.
 959          */
 960         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 961         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 962
 963         iwl_setup_rx_scan_handlers(priv);
 964         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 965
 966         /* Set up hardware specific Rx handlers */
 967         iwl3945_hw_rx_handler_setup(priv);
 968 }
 969
 970 /************************** RX-FUNCTIONS ****************************/
 971 /*
 972  * Rx theory of operation
 973  *
 974  * The host allocates 32 DMA target addresses and passes the host address
 975  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 976  * 0 to 31
 977  *
 978  * Rx Queue Indexes
 979  * The host/firmware share two index registers for managing the Rx buffers.
 980  *
 981  * The READ index maps to the first position that the firmware may be writing
 982  * to -- the driver can read up to (but not including) this position and get
 983  * good data.
 984  * The READ index is managed by the firmware once the card is enabled.
 985  *
 986  * The WRITE index maps to the last position the driver has read from -- the
 987  * position preceding WRITE is the last slot the firmware can place a packet.
 988  *
 989  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 990  * WRITE = READ.
 991  *
 992  * During initialization, the host sets up the READ queue position to the first
 993  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 994  *
 995  * When the firmware places a packet in a buffer, it will advance the READ index
 996  * and fire the RX interrupt.  The driver can then query the READ index and
 997  * process as many packets as possible, moving the WRITE index forward as it
 998  * resets the Rx queue buffers with new memory.
 999  *
1000  * The management in the driver is as follows:
1001  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1002  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1003  *   to replenish the iwl->rxq->rx_free.
1004  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1005  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1006  *   'processed' and 'read' driver indexes as well)
1007  * + A received packet is processed and handed to the kernel network stack,
1008  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1009  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1010  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1011  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1012  *   were enough free buffers and RX_STALLED is set it is cleared.
1013  *
1014  *
1015  * Driver sequence:
1016  *
1017  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1018  *                            iwl3945_rx_queue_restock
1019  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1020  *                            queue, updates firmware pointers, and updates
1021  *                            the WRITE index.  If insufficient rx_free buffers
1022  *                            are available, schedules iwl3945_rx_replenish
1023  *
1024  * -- enable interrupts --
1025  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1026  *                            READ INDEX, detaching the SKB from the pool.
1027  *                            Moves the packet buffer from queue to rx_used.
1028  *                            Calls iwl3945_rx_queue_restock to refill any empty
1029  *                            slots.
1030  * ...
1031  *
1032  */
1033
1034 /**
1035  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1036  */
1037 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1038                                           dma_addr_t dma_addr)
1039 {
1040         return cpu_to_le32((u32)dma_addr);
1041 }
1042
1043 /**
1044  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1045  *
1046  * If there are slots in the RX queue that need to be restocked,
1047  * and we have free pre-allocated buffers, fill the ranks as much
1048  * as we can, pulling from rx_free.
1049  *
1050  * This moves the 'write' index forward to catch up with 'processed', and
1051  * also updates the memory address in the firmware to reference the new
1052  * target buffer.
1053  */
1054 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1055 {
1056         struct iwl_rx_queue *rxq = &priv->rxq;
1057         struct list_head *element;
1058         struct iwl_rx_mem_buffer *rxb;
1059         unsigned long flags;
1060         int write;
1061
1062         spin_lock_irqsave(&rxq->lock, flags);
1063         write = rxq->write & ~0x7;
1064         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1065                 /* Get next free Rx buffer, remove from free list */
1066                 element = rxq->rx_free.next;
1067                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1068                 list_del(element);
1069
1070                 /* Point to Rx buffer via next RBD in circular buffer */
1071                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1072                 rxq->queue[rxq->write] = rxb;
1073                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1074                 rxq->free_count--;
1075         }
1076         spin_unlock_irqrestore(&rxq->lock, flags);
1077         /* If the pre-allocated buffer pool is dropping low, schedule to
1078          * refill it */
1079         if (rxq->free_count <= RX_LOW_WATERMARK)
1080                 queue_work(priv->workqueue, &priv->rx_replenish);
1081
1082
1083         /* If we've added more space for the firmware to place data, tell it.
1084          * Increment device's write pointer in multiples of 8. */
1085         if ((rxq->write_actual != (rxq->write & ~0x7))
1086             || (abs(rxq->write - rxq->read) > 7)) {
1087                 spin_lock_irqsave(&rxq->lock, flags);
1088                 rxq->need_update = 1;
1089                 spin_unlock_irqrestore(&rxq->lock, flags);
1090                 iwl_rx_queue_update_write_ptr(priv, rxq);
1091         }
1092 }
1093
1094 /**
1095  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1096  *
1097  * When moving to rx_free an SKB is allocated for the slot.
1098  *
1099  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1100  * This is called as a scheduled work item (except for during initialization)
1101  */
1102 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1103 {
1104         struct iwl_rx_queue *rxq = &priv->rxq;
1105         struct list_head *element;
1106         struct iwl_rx_mem_buffer *rxb;
1107         struct page *page;
1108         unsigned long flags;
1109         gfp_t gfp_mask = priority;
1110
1111         while (1) {
1112                 spin_lock_irqsave(&rxq->lock, flags);
1113
1114                 if (list_empty(&rxq->rx_used)) {
1115                         spin_unlock_irqrestore(&rxq->lock, flags);
1116                         return;
1117                 }
1118                 spin_unlock_irqrestore(&rxq->lock, flags);
1119
1120                 if (rxq->free_count > RX_LOW_WATERMARK)
1121                         gfp_mask |= __GFP_NOWARN;
1122
1123                 if (priv->hw_params.rx_page_order > 0)
1124                         gfp_mask |= __GFP_COMP;
1125
1126                 /* Alloc a new receive buffer */
1127                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1128                 if (!page) {
1129                         if (net_ratelimit())
1130                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1131                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1132                             net_ratelimit())
1133                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1134                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1135                                          rxq->free_count);
1136                         /* We don't reschedule replenish work here -- we will
1137                          * call the restock method and if it still needs
1138                          * more buffers it will schedule replenish */
1139                         break;
1140                 }
1141
1142                 spin_lock_irqsave(&rxq->lock, flags);
1143                 if (list_empty(&rxq->rx_used)) {
1144                         spin_unlock_irqrestore(&rxq->lock, flags);
1145                         __free_pages(page, priv->hw_params.rx_page_order);
1146                         return;
1147                 }
1148                 element = rxq->rx_used.next;
1149                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1150                 list_del(element);
1151                 spin_unlock_irqrestore(&rxq->lock, flags);
1152
1153                 rxb->page = page;
1154                 /* Get physical address of RB/SKB */
1155                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1156                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1157                                 PCI_DMA_FROMDEVICE);
1158
1159                 spin_lock_irqsave(&rxq->lock, flags);
1160
1161                 list_add_tail(&rxb->list, &rxq->rx_free);
1162                 rxq->free_count++;
1163                 priv->alloc_rxb_page++;
1164
1165                 spin_unlock_irqrestore(&rxq->lock, flags);
1166         }
1167 }
1168
1169 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1170 {
1171         unsigned long flags;
1172         int i;
1173         spin_lock_irqsave(&rxq->lock, flags);
1174         INIT_LIST_HEAD(&rxq->rx_free);
1175         INIT_LIST_HEAD(&rxq->rx_used);
1176         /* Fill the rx_used queue with _all_ of the Rx buffers */
1177         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1178                 /* In the reset function, these buffers may have been allocated
1179                  * to an SKB, so we need to unmap and free potential storage */
1180                 if (rxq->pool[i].page != NULL) {
1181                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1182                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1183                                 PCI_DMA_FROMDEVICE);
1184                         __iwl_free_pages(priv, rxq->pool[i].page);
1185                         rxq->pool[i].page = NULL;
1186                 }
1187                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1188         }
1189
1190         /* Set us so that we have processed and used all buffers, but have
1191          * not restocked the Rx queue with fresh buffers */
1192         rxq->read = rxq->write = 0;
1193         rxq->write_actual = 0;
1194         rxq->free_count = 0;
1195         spin_unlock_irqrestore(&rxq->lock, flags);
1196 }
1197
1198 void iwl3945_rx_replenish(void *data)
1199 {
1200         struct iwl_priv *priv = data;
1201         unsigned long flags;
1202
1203         iwl3945_rx_allocate(priv, GFP_KERNEL);
1204
1205         spin_lock_irqsave(&priv->lock, flags);
1206         iwl3945_rx_queue_restock(priv);
1207         spin_unlock_irqrestore(&priv->lock, flags);
1208 }
1209
1210 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1211 {
1212         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1213
1214         iwl3945_rx_queue_restock(priv);
1215 }
1216
1217
1218 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1219  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1220  * This free routine walks the list of POOL entries and if SKB is set to
1221  * non NULL it is unmapped and freed
1222  */
1223 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1224 {
1225         int i;
1226         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1227                 if (rxq->pool[i].page != NULL) {
1228                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1229                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1230                                 PCI_DMA_FROMDEVICE);
1231                         __iwl_free_pages(priv, rxq->pool[i].page);
1232                         rxq->pool[i].page = NULL;
1233                 }
1234         }
1235
1236         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1237                           rxq->dma_addr);
1238         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1239                           rxq->rb_stts, rxq->rb_stts_dma);
1240         rxq->bd = NULL;
1241         rxq->rb_stts  = NULL;
1242 }
1243
1244
1245 /* Convert linear signal-to-noise ratio into dB */
1246 static u8 ratio2dB[100] = {
1247 /*       0   1   2   3   4   5   6   7   8   9 */
1248          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1249         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1250         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1251         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1252         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1253         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1254         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1255         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1256         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1257         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1258 };
1259
1260 /* Calculates a relative dB value from a ratio of linear
1261  *   (i.e. not dB) signal levels.
1262  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1263 int iwl3945_calc_db_from_ratio(int sig_ratio)
1264 {
1265         /* 1000:1 or higher just report as 60 dB */
1266         if (sig_ratio >= 1000)
1267                 return 60;
1268
1269         /* 100:1 or higher, divide by 10 and use table,
1270          *   add 20 dB to make up for divide by 10 */
1271         if (sig_ratio >= 100)
1272                 return 20 + (int)ratio2dB[sig_ratio/10];
1273
1274         /* We shouldn't see this */
1275         if (sig_ratio < 1)
1276                 return 0;
1277
1278         /* Use table for ratios 1:1 - 99:1 */
1279         return (int)ratio2dB[sig_ratio];
1280 }
1281
1282 /**
1283  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1284  *
1285  * Uses the priv->rx_handlers callback function array to invoke
1286  * the appropriate handlers, including command responses,
1287  * frame-received notifications, and other notifications.
1288  */
1289 static void iwl3945_rx_handle(struct iwl_priv *priv)
1290 {
1291         struct iwl_rx_mem_buffer *rxb;
1292         struct iwl_rx_packet *pkt;
1293         struct iwl_rx_queue *rxq = &priv->rxq;
1294         u32 r, i;
1295         int reclaim;
1296         unsigned long flags;
1297         u8 fill_rx = 0;
1298         u32 count = 8;
1299         int total_empty = 0;
1300
1301         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1302          * buffer that the driver may process (last buffer filled by ucode). */
1303         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1304         i = rxq->read;
1305
1306         /* calculate total frames need to be restock after handling RX */
1307         total_empty = r - rxq->write_actual;
1308         if (total_empty < 0)
1309                 total_empty += RX_QUEUE_SIZE;
1310
1311         if (total_empty > (RX_QUEUE_SIZE / 2))
1312                 fill_rx = 1;
1313         /* Rx interrupt, but nothing sent from uCode */
1314         if (i == r)
1315                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1316
1317         while (i != r) {
1318                 rxb = rxq->queue[i];
1319
1320                 /* If an RXB doesn't have a Rx queue slot associated with it,
1321                  * then a bug has been introduced in the queue refilling
1322                  * routines -- catch it here */
1323                 BUG_ON(rxb == NULL);
1324
1325                 rxq->queue[i] = NULL;
1326
1327                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1328                                PAGE_SIZE << priv->hw_params.rx_page_order,
1329                                PCI_DMA_FROMDEVICE);
1330                 pkt = rxb_addr(rxb);
1331
1332                 trace_iwlwifi_dev_rx(priv, pkt,
1333                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1334
1335                 /* Reclaim a command buffer only if this packet is a response
1336                  *   to a (driver-originated) command.
1337                  * If the packet (e.g. Rx frame) originated from uCode,
1338                  *   there is no command buffer to reclaim.
1339                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1340                  *   but apparently a few don't get set; catch them here. */
1341                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1342                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1343                         (pkt->hdr.cmd != REPLY_TX);
1344
1345                 /* Based on type of command response or notification,
1346                  *   handle those that need handling via function in
1347                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1348                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1349                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1350                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1351                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1352                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1353                 } else {
1354                         /* No handling needed */
1355                         IWL_DEBUG_RX(priv,
1356                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1357                                 r, i, get_cmd_string(pkt->hdr.cmd),
1358                                 pkt->hdr.cmd);
1359                 }
1360
1361                 /*
1362                  * XXX: After here, we should always check rxb->page
1363                  * against NULL before touching it or its virtual
1364                  * memory (pkt). Because some rx_handler might have
1365                  * already taken or freed the pages.
1366                  */
1367
1368                 if (reclaim) {
1369                         /* Invoke any callbacks, transfer the buffer to caller,
1370                          * and fire off the (possibly) blocking iwl_send_cmd()
1371                          * as we reclaim the driver command queue */
1372                         if (rxb->page)
1373                                 iwl_tx_cmd_complete(priv, rxb);
1374                         else
1375                                 IWL_WARN(priv, "Claim null rxb?\n");
1376                 }
1377
1378                 /* Reuse the page if possible. For notification packets and
1379                  * SKBs that fail to Rx correctly, add them back into the
1380                  * rx_free list for reuse later. */
1381                 spin_lock_irqsave(&rxq->lock, flags);
1382                 if (rxb->page != NULL) {
1383                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1384                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1385                                 PCI_DMA_FROMDEVICE);
1386                         list_add_tail(&rxb->list, &rxq->rx_free);
1387                         rxq->free_count++;
1388                 } else
1389                         list_add_tail(&rxb->list, &rxq->rx_used);
1390
1391                 spin_unlock_irqrestore(&rxq->lock, flags);
1392
1393                 i = (i + 1) & RX_QUEUE_MASK;
1394                 /* If there are a lot of unused frames,
1395                  * restock the Rx queue so ucode won't assert. */
1396                 if (fill_rx) {
1397                         count++;
1398                         if (count >= 8) {
1399                                 rxq->read = i;
1400                                 iwl3945_rx_replenish_now(priv);
1401                                 count = 0;
1402                         }
1403                 }
1404         }
1405
1406         /* Backtrack one entry */
1407         rxq->read = i;
1408         if (fill_rx)
1409                 iwl3945_rx_replenish_now(priv);
1410         else
1411                 iwl3945_rx_queue_restock(priv);
1412 }
1413
1414 /* call this function to flush any scheduled tasklet */
1415 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1416 {
1417         /* wait to make sure we flush pending tasklet*/
1418         synchronize_irq(priv->pci_dev->irq);
1419         tasklet_kill(&priv->irq_tasklet);
1420 }
1421
1422 static const char *desc_lookup(int i)
1423 {
1424         switch (i) {
1425         case 1:
1426                 return "FAIL";
1427         case 2:
1428                 return "BAD_PARAM";
1429         case 3:
1430                 return "BAD_CHECKSUM";
1431         case 4:
1432                 return "NMI_INTERRUPT";
1433         case 5:
1434                 return "SYSASSERT";
1435         case 6:
1436                 return "FATAL_ERROR";
1437         }
1438
1439         return "UNKNOWN";
1440 }
1441
1442 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1443 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1444
1445 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1446 {
1447         u32 i;
1448         u32 desc, time, count, base, data1;
1449         u32 blink1, blink2, ilink1, ilink2;
1450
1451         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1452
1453         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1454                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1455                 return;
1456         }
1457
1458
1459         count = iwl_read_targ_mem(priv, base);
1460
1461         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1462                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1463                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1464                         priv->status, count);
1465         }
1466
1467         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1468                   "ilink1  nmiPC   Line\n");
1469         for (i = ERROR_START_OFFSET;
1470              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1471              i += ERROR_ELEM_SIZE) {
1472                 desc = iwl_read_targ_mem(priv, base + i);
1473                 time =
1474                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1475                 blink1 =
1476                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1477                 blink2 =
1478                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1479                 ilink1 =
1480                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1481                 ilink2 =
1482                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1483                 data1 =
1484                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1485
1486                 IWL_ERR(priv,
1487                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1488                         desc_lookup(desc), desc, time, blink1, blink2,
1489                         ilink1, ilink2, data1);
1490                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1491                                         0, blink1, blink2, ilink1, ilink2);
1492         }
1493 }
1494
1495 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1496
1497 /**
1498  * iwl3945_print_event_log - Dump error event log to syslog
1499  *
1500  */
1501 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1502                                   u32 num_events, u32 mode,
1503                                   int pos, char **buf, size_t bufsz)
1504 {
1505         u32 i;
1506         u32 base;       /* SRAM byte address of event log header */
1507         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1508         u32 ptr;        /* SRAM byte address of log data */
1509         u32 ev, time, data; /* event log data */
1510         unsigned long reg_flags;
1511
1512         if (num_events == 0)
1513                 return pos;
1514
1515         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1516
1517         if (mode == 0)
1518                 event_size = 2 * sizeof(u32);
1519         else
1520                 event_size = 3 * sizeof(u32);
1521
1522         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1523
1524         /* Make sure device is powered up for SRAM reads */
1525         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1526         iwl_grab_nic_access(priv);
1527
1528         /* Set starting address; reads will auto-increment */
1529         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1530         rmb();
1531
1532         /* "time" is actually "data" for mode 0 (no timestamp).
1533          * place event id # at far right for easier visual parsing. */
1534         for (i = 0; i < num_events; i++) {
1535                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1536                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1537                 if (mode == 0) {
1538                         /* data, ev */
1539                         if (bufsz) {
1540                                 pos += scnprintf(*buf + pos, bufsz - pos,
1541                                                 "0x%08x:%04u\n",
1542                                                 time, ev);
1543                         } else {
1544                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1545                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1546                                                               time, ev);
1547                         }
1548                 } else {
1549                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1550                         if (bufsz) {
1551                                 pos += scnprintf(*buf + pos, bufsz - pos,
1552                                                 "%010u:0x%08x:%04u\n",
1553                                                  time, data, ev);
1554                         } else {
1555                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1556                                         time, data, ev);
1557                                 trace_iwlwifi_dev_ucode_event(priv, time,
1558                                                               data, ev);
1559                         }
1560                 }
1561         }
1562
1563         /* Allow device to power down */
1564         iwl_release_nic_access(priv);
1565         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1566         return pos;
1567 }
1568
1569 /**
1570  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1571  */
1572 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1573                                       u32 num_wraps, u32 next_entry,
1574                                       u32 size, u32 mode,
1575                                       int pos, char **buf, size_t bufsz)
1576 {
1577         /*
1578          * display the newest DEFAULT_LOG_ENTRIES entries
1579          * i.e the entries just before the next ont that uCode would fill.
1580          */
1581         if (num_wraps) {
1582                 if (next_entry < size) {
1583                         pos = iwl3945_print_event_log(priv,
1584                                              capacity - (size - next_entry),
1585                                              size - next_entry, mode,
1586                                              pos, buf, bufsz);
1587                         pos = iwl3945_print_event_log(priv, 0,
1588                                                       next_entry, mode,
1589                                                       pos, buf, bufsz);
1590                 } else
1591                         pos = iwl3945_print_event_log(priv, next_entry - size,
1592                                                       size, mode,
1593                                                       pos, buf, bufsz);
1594         } else {
1595                 if (next_entry < size)
1596                         pos = iwl3945_print_event_log(priv, 0,
1597                                                       next_entry, mode,
1598                                                       pos, buf, bufsz);
1599                 else
1600                         pos = iwl3945_print_event_log(priv, next_entry - size,
1601                                                       size, mode,
1602                                                       pos, buf, bufsz);
1603         }
1604         return pos;
1605 }
1606
1607 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1608
1609 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1610                             char **buf, bool display)
1611 {
1612         u32 base;       /* SRAM byte address of event log header */
1613         u32 capacity;   /* event log capacity in # entries */
1614         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1615         u32 num_wraps;  /* # times uCode wrapped to top of log */
1616         u32 next_entry; /* index of next entry to be written by uCode */
1617         u32 size;       /* # entries that we'll print */
1618         int pos = 0;
1619         size_t bufsz = 0;
1620
1621         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1622         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1623                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1624                 return  -EINVAL;
1625         }
1626
1627         /* event log header */
1628         capacity = iwl_read_targ_mem(priv, base);
1629         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1630         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1631         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1632
1633         if (capacity > priv->cfg->max_event_log_size) {
1634                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1635                         capacity, priv->cfg->max_event_log_size);
1636                 capacity = priv->cfg->max_event_log_size;
1637         }
1638
1639         if (next_entry > priv->cfg->max_event_log_size) {
1640                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1641                         next_entry, priv->cfg->max_event_log_size);
1642                 next_entry = priv->cfg->max_event_log_size;
1643         }
1644
1645         size = num_wraps ? capacity : next_entry;
1646
1647         /* bail out if nothing in log */
1648         if (size == 0) {
1649                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1650                 return pos;
1651         }
1652
1653 #ifdef CONFIG_IWLWIFI_DEBUG
1654         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1655                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1656                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1657 #else
1658         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1659                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1660 #endif
1661
1662         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1663                   size);
1664
1665 #ifdef CONFIG_IWLWIFI_DEBUG
1666         if (display) {
1667                 if (full_log)
1668                         bufsz = capacity * 48;
1669                 else
1670                         bufsz = size * 48;
1671                 *buf = kmalloc(bufsz, GFP_KERNEL);
1672                 if (!*buf)
1673                         return -ENOMEM;
1674         }
1675         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1676                 /* if uCode has wrapped back to top of log,
1677                  * start at the oldest entry,
1678                  * i.e the next one that uCode would fill.
1679                  */
1680                 if (num_wraps)
1681                         pos = iwl3945_print_event_log(priv, next_entry,
1682                                                 capacity - next_entry, mode,
1683                                                 pos, buf, bufsz);
1684
1685                 /* (then/else) start at top of log */
1686                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1687                                               pos, buf, bufsz);
1688         } else
1689                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1690                                                     next_entry, size, mode,
1691                                                     pos, buf, bufsz);
1692 #else
1693         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1694                                             next_entry, size, mode,
1695                                             pos, buf, bufsz);
1696 #endif
1697         return pos;
1698 }
1699
1700 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1701 {
1702         u32 inta, handled = 0;
1703         u32 inta_fh;
1704         unsigned long flags;
1705 #ifdef CONFIG_IWLWIFI_DEBUG
1706         u32 inta_mask;
1707 #endif
1708
1709         spin_lock_irqsave(&priv->lock, flags);
1710
1711         /* Ack/clear/reset pending uCode interrupts.
1712          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1713          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1714         inta = iwl_read32(priv, CSR_INT);
1715         iwl_write32(priv, CSR_INT, inta);
1716
1717         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1718          * Any new interrupts that happen after this, either while we're
1719          * in this tasklet, or later, will show up in next ISR/tasklet. */
1720         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1721         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1722
1723 #ifdef CONFIG_IWLWIFI_DEBUG
1724         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1725                 /* just for debug */
1726                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1727                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1728                               inta, inta_mask, inta_fh);
1729         }
1730 #endif
1731
1732         spin_unlock_irqrestore(&priv->lock, flags);
1733
1734         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1735          * atomic, make sure that inta covers all the interrupts that
1736          * we've discovered, even if FH interrupt came in just after
1737          * reading CSR_INT. */
1738         if (inta_fh & CSR39_FH_INT_RX_MASK)
1739                 inta |= CSR_INT_BIT_FH_RX;
1740         if (inta_fh & CSR39_FH_INT_TX_MASK)
1741                 inta |= CSR_INT_BIT_FH_TX;
1742
1743         /* Now service all interrupt bits discovered above. */
1744         if (inta & CSR_INT_BIT_HW_ERR) {
1745                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1746
1747                 /* Tell the device to stop sending interrupts */
1748                 iwl_disable_interrupts(priv);
1749
1750                 priv->isr_stats.hw++;
1751                 iwl_irq_handle_error(priv);
1752
1753                 handled |= CSR_INT_BIT_HW_ERR;
1754
1755                 return;
1756         }
1757
1758 #ifdef CONFIG_IWLWIFI_DEBUG
1759         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1760                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1761                 if (inta & CSR_INT_BIT_SCD) {
1762                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1763                                       "the frame/frames.\n");
1764                         priv->isr_stats.sch++;
1765                 }
1766
1767                 /* Alive notification via Rx interrupt will do the real work */
1768                 if (inta & CSR_INT_BIT_ALIVE) {
1769                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1770                         priv->isr_stats.alive++;
1771                 }
1772         }
1773 #endif
1774         /* Safely ignore these bits for debug checks below */
1775         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1776
1777         /* Error detected by uCode */
1778         if (inta & CSR_INT_BIT_SW_ERR) {
1779                 IWL_ERR(priv, "Microcode SW error detected. "
1780                         "Restarting 0x%X.\n", inta);
1781                 priv->isr_stats.sw++;
1782                 priv->isr_stats.sw_err = inta;
1783                 iwl_irq_handle_error(priv);
1784                 handled |= CSR_INT_BIT_SW_ERR;
1785         }
1786
1787         /* uCode wakes up after power-down sleep */
1788         if (inta & CSR_INT_BIT_WAKEUP) {
1789                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1790                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1791                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1792                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1793                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1794                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1795                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1796                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1797
1798                 priv->isr_stats.wakeup++;
1799                 handled |= CSR_INT_BIT_WAKEUP;
1800         }
1801
1802         /* All uCode command responses, including Tx command responses,
1803          * Rx "responses" (frame-received notification), and other
1804          * notifications from uCode come through here*/
1805         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1806                 iwl3945_rx_handle(priv);
1807                 priv->isr_stats.rx++;
1808                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1809         }
1810
1811         if (inta & CSR_INT_BIT_FH_TX) {
1812                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1813                 priv->isr_stats.tx++;
1814
1815                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1816                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1817                                         (FH39_SRVC_CHNL), 0x0);
1818                 handled |= CSR_INT_BIT_FH_TX;
1819         }
1820
1821         if (inta & ~handled) {
1822                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1823                 priv->isr_stats.unhandled++;
1824         }
1825
1826         if (inta & ~priv->inta_mask) {
1827                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1828                          inta & ~priv->inta_mask);
1829                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1830         }
1831
1832         /* Re-enable all interrupts */
1833         /* only Re-enable if disabled by irq */
1834         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1835                 iwl_enable_interrupts(priv);
1836
1837 #ifdef CONFIG_IWLWIFI_DEBUG
1838         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1839                 inta = iwl_read32(priv, CSR_INT);
1840                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1841                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1842                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1843                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1844         }
1845 #endif
1846 }
1847
1848 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1849                                          enum ieee80211_band band,
1850                                      u8 is_active, u8 n_probes,
1851                                      struct iwl3945_scan_channel *scan_ch,
1852                                      struct ieee80211_vif *vif)
1853 {
1854         struct ieee80211_channel *chan;
1855         const struct ieee80211_supported_band *sband;
1856         const struct iwl_channel_info *ch_info;
1857         u16 passive_dwell = 0;
1858         u16 active_dwell = 0;
1859         int added, i;
1860
1861         sband = iwl_get_hw_mode(priv, band);
1862         if (!sband)
1863                 return 0;
1864
1865         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1866         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1867
1868         if (passive_dwell <= active_dwell)
1869                 passive_dwell = active_dwell + 1;
1870
1871         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1872                 chan = priv->scan_request->channels[i];
1873
1874                 if (chan->band != band)
1875                         continue;
1876
1877                 scan_ch->channel = chan->hw_value;
1878
1879                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1880                 if (!is_channel_valid(ch_info)) {
1881                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1882                                        scan_ch->channel);
1883                         continue;
1884                 }
1885
1886                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1887                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1888                 /* If passive , set up for auto-switch
1889                  *  and use long active_dwell time.
1890                  */
1891                 if (!is_active || is_channel_passive(ch_info) ||
1892                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1893                         scan_ch->type = 0;      /* passive */
1894                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1895                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1896                 } else {
1897                         scan_ch->type = 1;      /* active */
1898                 }
1899
1900                 /* Set direct probe bits. These may be used both for active
1901                  * scan channels (probes gets sent right away),
1902                  * or for passive channels (probes get se sent only after
1903                  * hearing clear Rx packet).*/
1904                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1905                         if (n_probes)
1906                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1907                 } else {
1908                         /* uCode v1 does not allow setting direct probe bits on
1909                          * passive channel. */
1910                         if ((scan_ch->type & 1) && n_probes)
1911                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1912                 }
1913
1914                 /* Set txpower levels to defaults */
1915                 scan_ch->tpc.dsp_atten = 110;
1916                 /* scan_pwr_info->tpc.dsp_atten; */
1917
1918                 /*scan_pwr_info->tpc.tx_gain; */
1919                 if (band == IEEE80211_BAND_5GHZ)
1920                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1921                 else {
1922                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1923                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1924                          * power level:
1925                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1926                          */
1927                 }
1928
1929                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1930                                scan_ch->channel,
1931                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1932                                (scan_ch->type & 1) ?
1933                                active_dwell : passive_dwell);
1934
1935                 scan_ch++;
1936                 added++;
1937         }
1938
1939         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1940         return added;
1941 }
1942
1943 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1944                               struct ieee80211_rate *rates)
1945 {
1946         int i;
1947
1948         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1949                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1950                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1951                 rates[i].hw_value_short = i;
1952                 rates[i].flags = 0;
1953                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1954                         /*
1955                          * If CCK != 1M then set short preamble rate flag.
1956                          */
1957                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1958                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1959                 }
1960         }
1961 }
1962
1963 /******************************************************************************
1964  *
1965  * uCode download functions
1966  *
1967  ******************************************************************************/
1968
1969 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1970 {
1971         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1972         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1973         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1974         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1975         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1976         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1977 }
1978
1979 /**
1980  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1981  *     looking at all data.
1982  */
1983 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1984 {
1985         u32 val;
1986         u32 save_len = len;
1987         int rc = 0;
1988         u32 errcnt;
1989
1990         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1991
1992         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1993                                IWL39_RTC_INST_LOWER_BOUND);
1994
1995         errcnt = 0;
1996         for (; len > 0; len -= sizeof(u32), image++) {
1997                 /* read data comes through single port, auto-incr addr */
1998                 /* NOTE: Use the debugless read so we don't flood kernel log
1999                  * if IWL_DL_IO is set */
2000                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2001                 if (val != le32_to_cpu(*image)) {
2002                         IWL_ERR(priv, "uCode INST section is invalid at "
2003                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2004                                   save_len - len, val, le32_to_cpu(*image));
2005                         rc = -EIO;
2006                         errcnt++;
2007                         if (errcnt >= 20)
2008                                 break;
2009                 }
2010         }
2011
2012
2013         if (!errcnt)
2014                 IWL_DEBUG_INFO(priv,
2015                         "ucode image in INSTRUCTION memory is good\n");
2016
2017         return rc;
2018 }
2019
2020
2021 /**
2022  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2023  *   using sample data 100 bytes apart.  If these sample points are good,
2024  *   it's a pretty good bet that everything between them is good, too.
2025  */
2026 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2027 {
2028         u32 val;
2029         int rc = 0;
2030         u32 errcnt = 0;
2031         u32 i;
2032
2033         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2034
2035         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2036                 /* read data comes through single port, auto-incr addr */
2037                 /* NOTE: Use the debugless read so we don't flood kernel log
2038                  * if IWL_DL_IO is set */
2039                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2040                         i + IWL39_RTC_INST_LOWER_BOUND);
2041                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2042                 if (val != le32_to_cpu(*image)) {
2043 #if 0 /* Enable this if you want to see details */
2044                         IWL_ERR(priv, "uCode INST section is invalid at "
2045                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2046                                   i, val, *image);
2047 #endif
2048                         rc = -EIO;
2049                         errcnt++;
2050                         if (errcnt >= 3)
2051                                 break;
2052                 }
2053         }
2054
2055         return rc;
2056 }
2057
2058
2059 /**
2060  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2061  *    and verify its contents
2062  */
2063 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2064 {
2065         __le32 *image;
2066         u32 len;
2067         int rc = 0;
2068
2069         /* Try bootstrap */
2070         image = (__le32 *)priv->ucode_boot.v_addr;
2071         len = priv->ucode_boot.len;
2072         rc = iwl3945_verify_inst_sparse(priv, image, len);
2073         if (rc == 0) {
2074                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2075                 return 0;
2076         }
2077
2078         /* Try initialize */
2079         image = (__le32 *)priv->ucode_init.v_addr;
2080         len = priv->ucode_init.len;
2081         rc = iwl3945_verify_inst_sparse(priv, image, len);
2082         if (rc == 0) {
2083                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2084                 return 0;
2085         }
2086
2087         /* Try runtime/protocol */
2088         image = (__le32 *)priv->ucode_code.v_addr;
2089         len = priv->ucode_code.len;
2090         rc = iwl3945_verify_inst_sparse(priv, image, len);
2091         if (rc == 0) {
2092                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2093                 return 0;
2094         }
2095
2096         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2097
2098         /* Since nothing seems to match, show first several data entries in
2099          * instruction SRAM, so maybe visual inspection will give a clue.
2100          * Selection of bootstrap image (vs. other images) is arbitrary. */
2101         image = (__le32 *)priv->ucode_boot.v_addr;
2102         len = priv->ucode_boot.len;
2103         rc = iwl3945_verify_inst_full(priv, image, len);
2104
2105         return rc;
2106 }
2107
2108 static void iwl3945_nic_start(struct iwl_priv *priv)
2109 {
2110         /* Remove all resets to allow NIC to operate */
2111         iwl_write32(priv, CSR_RESET, 0);
2112 }
2113
2114 #define IWL3945_UCODE_GET(item)                                         \
2115 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2116 {                                                                       \
2117         return le32_to_cpu(ucode->u.v1.item);                           \
2118 }
2119
2120 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2121 {
2122         return 24;
2123 }
2124
2125 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2126 {
2127         return (u8 *) ucode->u.v1.data;
2128 }
2129
2130 IWL3945_UCODE_GET(inst_size);
2131 IWL3945_UCODE_GET(data_size);
2132 IWL3945_UCODE_GET(init_size);
2133 IWL3945_UCODE_GET(init_data_size);
2134 IWL3945_UCODE_GET(boot_size);
2135
2136 /**
2137  * iwl3945_read_ucode - Read uCode images from disk file.
2138  *
2139  * Copy into buffers for card to fetch via bus-mastering
2140  */
2141 static int iwl3945_read_ucode(struct iwl_priv *priv)
2142 {
2143         const struct iwl_ucode_header *ucode;
2144         int ret = -EINVAL, index;
2145         const struct firmware *ucode_raw;
2146         /* firmware file name contains uCode/driver compatibility version */
2147         const char *name_pre = priv->cfg->fw_name_pre;
2148         const unsigned int api_max = priv->cfg->ucode_api_max;
2149         const unsigned int api_min = priv->cfg->ucode_api_min;
2150         char buf[25];
2151         u8 *src;
2152         size_t len;
2153         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2154
2155         /* Ask kernel firmware_class module to get the boot firmware off disk.
2156          * request_firmware() is synchronous, file is in memory on return. */
2157         for (index = api_max; index >= api_min; index--) {
2158                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2159                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2160                 if (ret < 0) {
2161                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2162                                   buf, ret);
2163                         if (ret == -ENOENT)
2164                                 continue;
2165                         else
2166                                 goto error;
2167                 } else {
2168                         if (index < api_max)
2169                                 IWL_ERR(priv, "Loaded firmware %s, "
2170                                         "which is deprecated. "
2171                                         " Please use API v%u instead.\n",
2172                                           buf, api_max);
2173                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2174                                        "(%zd bytes) from disk\n",
2175                                        buf, ucode_raw->size);
2176                         break;
2177                 }
2178         }
2179
2180         if (ret < 0)
2181                 goto error;
2182
2183         /* Make sure that we got at least our header! */
2184         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2185                 IWL_ERR(priv, "File size way too small!\n");
2186                 ret = -EINVAL;
2187                 goto err_release;
2188         }
2189
2190         /* Data from ucode file:  header followed by uCode images */
2191         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2192
2193         priv->ucode_ver = le32_to_cpu(ucode->ver);
2194         api_ver = IWL_UCODE_API(priv->ucode_ver);
2195         inst_size = iwl3945_ucode_get_inst_size(ucode);
2196         data_size = iwl3945_ucode_get_data_size(ucode);
2197         init_size = iwl3945_ucode_get_init_size(ucode);
2198         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2199         boot_size = iwl3945_ucode_get_boot_size(ucode);
2200         src = iwl3945_ucode_get_data(ucode);
2201
2202         /* api_ver should match the api version forming part of the
2203          * firmware filename ... but we don't check for that and only rely
2204          * on the API version read from firmware header from here on forward */
2205
2206         if (api_ver < api_min || api_ver > api_max) {
2207                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2208                           "Driver supports v%u, firmware is v%u.\n",
2209                           api_max, api_ver);
2210                 priv->ucode_ver = 0;
2211                 ret = -EINVAL;
2212                 goto err_release;
2213         }
2214         if (api_ver != api_max)
2215                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2216                           "got %u. New firmware can be obtained "
2217                           "from http://www.intellinuxwireless.org.\n",
2218                           api_max, api_ver);
2219
2220         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2221                 IWL_UCODE_MAJOR(priv->ucode_ver),
2222                 IWL_UCODE_MINOR(priv->ucode_ver),
2223                 IWL_UCODE_API(priv->ucode_ver),
2224                 IWL_UCODE_SERIAL(priv->ucode_ver));
2225
2226         snprintf(priv->hw->wiphy->fw_version,
2227                  sizeof(priv->hw->wiphy->fw_version),
2228                  "%u.%u.%u.%u",
2229                  IWL_UCODE_MAJOR(priv->ucode_ver),
2230                  IWL_UCODE_MINOR(priv->ucode_ver),
2231                  IWL_UCODE_API(priv->ucode_ver),
2232                  IWL_UCODE_SERIAL(priv->ucode_ver));
2233
2234         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2235                        priv->ucode_ver);
2236         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2237                        inst_size);
2238         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2239                        data_size);
2240         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2241                        init_size);
2242         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2243                        init_data_size);
2244         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2245                        boot_size);
2246
2247
2248         /* Verify size of file vs. image size info in file's header */
2249         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2250                 inst_size + data_size + init_size +
2251                 init_data_size + boot_size) {
2252
2253                 IWL_DEBUG_INFO(priv,
2254                         "uCode file size %zd does not match expected size\n",
2255                         ucode_raw->size);
2256                 ret = -EINVAL;
2257                 goto err_release;
2258         }
2259
2260         /* Verify that uCode images will fit in card's SRAM */
2261         if (inst_size > IWL39_MAX_INST_SIZE) {
2262                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2263                                inst_size);
2264                 ret = -EINVAL;
2265                 goto err_release;
2266         }
2267
2268         if (data_size > IWL39_MAX_DATA_SIZE) {
2269                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2270                                data_size);
2271                 ret = -EINVAL;
2272                 goto err_release;
2273         }
2274         if (init_size > IWL39_MAX_INST_SIZE) {
2275                 IWL_DEBUG_INFO(priv,
2276                                 "uCode init instr len %d too large to fit in\n",
2277                                 init_size);
2278                 ret = -EINVAL;
2279                 goto err_release;
2280         }
2281         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2282                 IWL_DEBUG_INFO(priv,
2283                                 "uCode init data len %d too large to fit in\n",
2284                                 init_data_size);
2285                 ret = -EINVAL;
2286                 goto err_release;
2287         }
2288         if (boot_size > IWL39_MAX_BSM_SIZE) {
2289                 IWL_DEBUG_INFO(priv,
2290                                 "uCode boot instr len %d too large to fit in\n",
2291                                 boot_size);
2292                 ret = -EINVAL;
2293                 goto err_release;
2294         }
2295
2296         /* Allocate ucode buffers for card's bus-master loading ... */
2297
2298         /* Runtime instructions and 2 copies of data:
2299          * 1) unmodified from disk
2300          * 2) backup cache for save/restore during power-downs */
2301         priv->ucode_code.len = inst_size;
2302         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2303
2304         priv->ucode_data.len = data_size;
2305         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2306
2307         priv->ucode_data_backup.len = data_size;
2308         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2309
2310         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2311             !priv->ucode_data_backup.v_addr)
2312                 goto err_pci_alloc;
2313
2314         /* Initialization instructions and data */
2315         if (init_size && init_data_size) {
2316                 priv->ucode_init.len = init_size;
2317                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2318
2319                 priv->ucode_init_data.len = init_data_size;
2320                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2321
2322                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2323                         goto err_pci_alloc;
2324         }
2325
2326         /* Bootstrap (instructions only, no data) */
2327         if (boot_size) {
2328                 priv->ucode_boot.len = boot_size;
2329                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2330
2331                 if (!priv->ucode_boot.v_addr)
2332                         goto err_pci_alloc;
2333         }
2334
2335         /* Copy images into buffers for card's bus-master reads ... */
2336
2337         /* Runtime instructions (first block of data in file) */
2338         len = inst_size;
2339         IWL_DEBUG_INFO(priv,
2340                 "Copying (but not loading) uCode instr len %zd\n", len);
2341         memcpy(priv->ucode_code.v_addr, src, len);
2342         src += len;
2343
2344         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2345                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2346
2347         /* Runtime data (2nd block)
2348          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2349         len = data_size;
2350         IWL_DEBUG_INFO(priv,
2351                 "Copying (but not loading) uCode data len %zd\n", len);
2352         memcpy(priv->ucode_data.v_addr, src, len);
2353         memcpy(priv->ucode_data_backup.v_addr, src, len);
2354         src += len;
2355
2356         /* Initialization instructions (3rd block) */
2357         if (init_size) {
2358                 len = init_size;
2359                 IWL_DEBUG_INFO(priv,
2360                         "Copying (but not loading) init instr len %zd\n", len);
2361                 memcpy(priv->ucode_init.v_addr, src, len);
2362                 src += len;
2363         }
2364
2365         /* Initialization data (4th block) */
2366         if (init_data_size) {
2367                 len = init_data_size;
2368                 IWL_DEBUG_INFO(priv,
2369                         "Copying (but not loading) init data len %zd\n", len);
2370                 memcpy(priv->ucode_init_data.v_addr, src, len);
2371                 src += len;
2372         }
2373
2374         /* Bootstrap instructions (5th block) */
2375         len = boot_size;
2376         IWL_DEBUG_INFO(priv,
2377                 "Copying (but not loading) boot instr len %zd\n", len);
2378         memcpy(priv->ucode_boot.v_addr, src, len);
2379
2380         /* We have our copies now, allow OS release its copies */
2381         release_firmware(ucode_raw);
2382         return 0;
2383
2384  err_pci_alloc:
2385         IWL_ERR(priv, "failed to allocate pci memory\n");
2386         ret = -ENOMEM;
2387         iwl3945_dealloc_ucode_pci(priv);
2388
2389  err_release:
2390         release_firmware(ucode_raw);
2391
2392  error:
2393         return ret;
2394 }
2395
2396
2397 /**
2398  * iwl3945_set_ucode_ptrs - Set uCode address location
2399  *
2400  * Tell initialization uCode where to find runtime uCode.
2401  *
2402  * BSM registers initially contain pointers to initialization uCode.
2403  * We need to replace them to load runtime uCode inst and data,
2404  * and to save runtime data when powering down.
2405  */
2406 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2407 {
2408         dma_addr_t pinst;
2409         dma_addr_t pdata;
2410
2411         /* bits 31:0 for 3945 */
2412         pinst = priv->ucode_code.p_addr;
2413         pdata = priv->ucode_data_backup.p_addr;
2414
2415         /* Tell bootstrap uCode where to find image to load */
2416         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2417         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2418         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2419                                  priv->ucode_data.len);
2420
2421         /* Inst byte count must be last to set up, bit 31 signals uCode
2422          *   that all new ptr/size info is in place */
2423         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2424                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2425
2426         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2427
2428         return 0;
2429 }
2430
2431 /**
2432  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2433  *
2434  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2435  *
2436  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2437  */
2438 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2439 {
2440         /* Check alive response for "valid" sign from uCode */
2441         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2442                 /* We had an error bringing up the hardware, so take it
2443                  * all the way back down so we can try again */
2444                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2445                 goto restart;
2446         }
2447
2448         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2449          * This is a paranoid check, because we would not have gotten the
2450          * "initialize" alive if code weren't properly loaded.  */
2451         if (iwl3945_verify_ucode(priv)) {
2452                 /* Runtime instruction load was bad;
2453                  * take it all the way back down so we can try again */
2454                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2455                 goto restart;
2456         }
2457
2458         /* Send pointers to protocol/runtime uCode image ... init code will
2459          * load and launch runtime uCode, which will send us another "Alive"
2460          * notification. */
2461         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2462         if (iwl3945_set_ucode_ptrs(priv)) {
2463                 /* Runtime instruction load won't happen;
2464                  * take it all the way back down so we can try again */
2465                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2466                 goto restart;
2467         }
2468         return;
2469
2470  restart:
2471         queue_work(priv->workqueue, &priv->restart);
2472 }
2473
2474 /**
2475  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2476  *                   from protocol/runtime uCode (initialization uCode's
2477  *                   Alive gets handled by iwl3945_init_alive_start()).
2478  */
2479 static void iwl3945_alive_start(struct iwl_priv *priv)
2480 {
2481         int thermal_spin = 0;
2482         u32 rfkill;
2483
2484         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2485
2486         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2487                 /* We had an error bringing up the hardware, so take it
2488                  * all the way back down so we can try again */
2489                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2490                 goto restart;
2491         }
2492
2493         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2494          * This is a paranoid check, because we would not have gotten the
2495          * "runtime" alive if code weren't properly loaded.  */
2496         if (iwl3945_verify_ucode(priv)) {
2497                 /* Runtime instruction load was bad;
2498                  * take it all the way back down so we can try again */
2499                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2500                 goto restart;
2501         }
2502
2503         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2504         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2505
2506         if (rfkill & 0x1) {
2507                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2508                 /* if RFKILL is not on, then wait for thermal
2509                  * sensor in adapter to kick in */
2510                 while (iwl3945_hw_get_temperature(priv) == 0) {
2511                         thermal_spin++;
2512                         udelay(10);
2513                 }
2514
2515                 if (thermal_spin)
2516                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2517                                        thermal_spin * 10);
2518         } else
2519                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2520
2521         /* After the ALIVE response, we can send commands to 3945 uCode */
2522         set_bit(STATUS_ALIVE, &priv->status);
2523
2524         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2525                 /* Enable timer to monitor the driver queues */
2526                 mod_timer(&priv->monitor_recover,
2527                         jiffies +
2528                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2529         }
2530
2531         if (iwl_is_rfkill(priv))
2532                 return;
2533
2534         ieee80211_wake_queues(priv->hw);
2535
2536         priv->active_rate = IWL_RATES_MASK;
2537
2538         iwl_power_update_mode(priv, true);
2539
2540         if (iwl_is_associated(priv)) {
2541                 struct iwl3945_rxon_cmd *active_rxon =
2542                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2543
2544                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2545                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2546         } else {
2547                 /* Initialize our rx_config data */
2548                 iwl_connection_init_rx_config(priv, NULL);
2549         }
2550
2551         /* Configure Bluetooth device coexistence support */
2552         priv->cfg->ops->hcmd->send_bt_config(priv);
2553
2554         /* Configure the adapter for unassociated operation */
2555         iwlcore_commit_rxon(priv);
2556
2557         iwl3945_reg_txpower_periodic(priv);
2558
2559         iwl_leds_init(priv);
2560
2561         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2562         set_bit(STATUS_READY, &priv->status);
2563         wake_up_interruptible(&priv->wait_command_queue);
2564
2565         return;
2566
2567  restart:
2568         queue_work(priv->workqueue, &priv->restart);
2569 }
2570
2571 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2572
2573 static void __iwl3945_down(struct iwl_priv *priv)
2574 {
2575         unsigned long flags;
2576         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2577         struct ieee80211_conf *conf = NULL;
2578
2579         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2580
2581         conf = ieee80211_get_hw_conf(priv->hw);
2582
2583         if (!exit_pending)
2584                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2585
2586         /* Station information will now be cleared in device */
2587         iwl_clear_ucode_stations(priv);
2588         iwl_dealloc_bcast_station(priv);
2589         iwl_clear_driver_stations(priv);
2590
2591         /* Unblock any waiting calls */
2592         wake_up_interruptible_all(&priv->wait_command_queue);
2593
2594         /* Wipe out the EXIT_PENDING status bit if we are not actually
2595          * exiting the module */
2596         if (!exit_pending)
2597                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2598
2599         /* stop and reset the on-board processor */
2600         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2601
2602         /* tell the device to stop sending interrupts */
2603         spin_lock_irqsave(&priv->lock, flags);
2604         iwl_disable_interrupts(priv);
2605         spin_unlock_irqrestore(&priv->lock, flags);
2606         iwl_synchronize_irq(priv);
2607
2608         if (priv->mac80211_registered)
2609                 ieee80211_stop_queues(priv->hw);
2610
2611         /* If we have not previously called iwl3945_init() then
2612          * clear all bits but the RF Kill bits and return */
2613         if (!iwl_is_init(priv)) {
2614                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2615                                         STATUS_RF_KILL_HW |
2616                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2617                                         STATUS_GEO_CONFIGURED |
2618                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2619                                         STATUS_EXIT_PENDING;
2620                 goto exit;
2621         }
2622
2623         /* ...otherwise clear out all the status bits but the RF Kill
2624          * bit and continue taking the NIC down. */
2625         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2626                                 STATUS_RF_KILL_HW |
2627                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2628                                 STATUS_GEO_CONFIGURED |
2629                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2630                                 STATUS_FW_ERROR |
2631                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2632                                 STATUS_EXIT_PENDING;
2633
2634         iwl3945_hw_txq_ctx_stop(priv);
2635         iwl3945_hw_rxq_stop(priv);
2636
2637         /* Power-down device's busmaster DMA clocks */
2638         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2639         udelay(5);
2640
2641         /* Stop the device, and put it in low power state */
2642         priv->cfg->ops->lib->apm_ops.stop(priv);
2643
2644  exit:
2645         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2646
2647         if (priv->ibss_beacon)
2648                 dev_kfree_skb(priv->ibss_beacon);
2649         priv->ibss_beacon = NULL;
2650
2651         /* clear out any free frames */
2652         iwl3945_clear_free_frames(priv);
2653 }
2654
2655 static void iwl3945_down(struct iwl_priv *priv)
2656 {
2657         mutex_lock(&priv->mutex);
2658         __iwl3945_down(priv);
2659         mutex_unlock(&priv->mutex);
2660
2661         iwl3945_cancel_deferred_work(priv);
2662 }
2663
2664 #define MAX_HW_RESTARTS 5
2665
2666 static int __iwl3945_up(struct iwl_priv *priv)
2667 {
2668         int rc, i;
2669
2670         rc = iwl_alloc_bcast_station(priv, false);
2671         if (rc)
2672                 return rc;
2673
2674         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2675                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2676                 return -EIO;
2677         }
2678
2679         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2680                 IWL_ERR(priv, "ucode not available for device bring up\n");
2681                 return -EIO;
2682         }
2683
2684         /* If platform's RF_KILL switch is NOT set to KILL */
2685         if (iwl_read32(priv, CSR_GP_CNTRL) &
2686                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2687                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2688         else {
2689                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2690                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2691                 return -ENODEV;
2692         }
2693
2694         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2695
2696         rc = iwl3945_hw_nic_init(priv);
2697         if (rc) {
2698                 IWL_ERR(priv, "Unable to int nic\n");
2699                 return rc;
2700         }
2701
2702         /* make sure rfkill handshake bits are cleared */
2703         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2704         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2705                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2706
2707         /* clear (again), then enable host interrupts */
2708         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2709         iwl_enable_interrupts(priv);
2710
2711         /* really make sure rfkill handshake bits are cleared */
2712         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2713         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2714
2715         /* Copy original ucode data image from disk into backup cache.
2716          * This will be used to initialize the on-board processor's
2717          * data SRAM for a clean start when the runtime program first loads. */
2718         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2719                priv->ucode_data.len);
2720
2721         /* We return success when we resume from suspend and rf_kill is on. */
2722         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2723                 return 0;
2724
2725         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2726
2727                 /* load bootstrap state machine,
2728                  * load bootstrap program into processor's memory,
2729                  * prepare to load the "initialize" uCode */
2730                 rc = priv->cfg->ops->lib->load_ucode(priv);
2731
2732                 if (rc) {
2733                         IWL_ERR(priv,
2734                                 "Unable to set up bootstrap uCode: %d\n", rc);
2735                         continue;
2736                 }
2737
2738                 /* start card; "initialize" will load runtime ucode */
2739                 iwl3945_nic_start(priv);
2740
2741                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2742
2743                 return 0;
2744         }
2745
2746         set_bit(STATUS_EXIT_PENDING, &priv->status);
2747         __iwl3945_down(priv);
2748         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2749
2750         /* tried to restart and config the device for as long as our
2751          * patience could withstand */
2752         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2753         return -EIO;
2754 }
2755
2756
2757 /*****************************************************************************
2758  *
2759  * Workqueue callbacks
2760  *
2761  *****************************************************************************/
2762
2763 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2764 {
2765         struct iwl_priv *priv =
2766             container_of(data, struct iwl_priv, init_alive_start.work);
2767
2768         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2769                 return;
2770
2771         mutex_lock(&priv->mutex);
2772         iwl3945_init_alive_start(priv);
2773         mutex_unlock(&priv->mutex);
2774 }
2775
2776 static void iwl3945_bg_alive_start(struct work_struct *data)
2777 {
2778         struct iwl_priv *priv =
2779             container_of(data, struct iwl_priv, alive_start.work);
2780
2781         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2782                 return;
2783
2784         mutex_lock(&priv->mutex);
2785         iwl3945_alive_start(priv);
2786         mutex_unlock(&priv->mutex);
2787 }
2788
2789 /*
2790  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2791  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2792  * *is* readable even when device has been SW_RESET into low power mode
2793  * (e.g. during RF KILL).
2794  */
2795 static void iwl3945_rfkill_poll(struct work_struct *data)
2796 {
2797         struct iwl_priv *priv =
2798             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2799         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2800         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2801                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2802
2803         if (new_rfkill != old_rfkill) {
2804                 if (new_rfkill)
2805                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2806                 else
2807                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2808
2809                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2810
2811                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2812                                 new_rfkill ? "disable radio" : "enable radio");
2813         }
2814
2815         /* Keep this running, even if radio now enabled.  This will be
2816          * cancelled in mac_start() if system decides to start again */
2817         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2818                            round_jiffies_relative(2 * HZ));
2819
2820 }
2821
2822 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2823 {
2824         struct iwl_host_cmd cmd = {
2825                 .id = REPLY_SCAN_CMD,
2826                 .len = sizeof(struct iwl3945_scan_cmd),
2827                 .flags = CMD_SIZE_HUGE,
2828         };
2829         struct iwl3945_scan_cmd *scan;
2830         struct ieee80211_conf *conf = NULL;
2831         u8 n_probes = 0;
2832         enum ieee80211_band band;
2833         bool is_active = false;
2834
2835         conf = ieee80211_get_hw_conf(priv->hw);
2836
2837         cancel_delayed_work(&priv->scan_check);
2838
2839         if (!iwl_is_ready(priv)) {
2840                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2841                 goto done;
2842         }
2843
2844         /* Make sure the scan wasn't canceled before this queued work
2845          * was given the chance to run... */
2846         if (!test_bit(STATUS_SCANNING, &priv->status))
2847                 goto done;
2848
2849         /* This should never be called or scheduled if there is currently
2850          * a scan active in the hardware. */
2851         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2852                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2853                                 "Ignoring second request.\n");
2854                 goto done;
2855         }
2856
2857         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2858                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2859                 goto done;
2860         }
2861
2862         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2863                 IWL_DEBUG_HC(priv,
2864                         "Scan request while abort pending. Queuing.\n");
2865                 goto done;
2866         }
2867
2868         if (iwl_is_rfkill(priv)) {
2869                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2870                 goto done;
2871         }
2872
2873         if (!test_bit(STATUS_READY, &priv->status)) {
2874                 IWL_DEBUG_HC(priv,
2875                         "Scan request while uninitialized. Queuing.\n");
2876                 goto done;
2877         }
2878
2879         if (!priv->scan_cmd) {
2880                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2881                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2882                 if (!priv->scan_cmd) {
2883                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2884                         goto done;
2885                 }
2886         }
2887         scan = priv->scan_cmd;
2888         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2889
2890         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2891         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2892
2893         if (iwl_is_associated(priv)) {
2894                 u16 interval = 0;
2895                 u32 extra;
2896                 u32 suspend_time = 100;
2897                 u32 scan_suspend_time = 100;
2898                 unsigned long flags;
2899
2900                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2901
2902                 spin_lock_irqsave(&priv->lock, flags);
2903                 interval = vif ? vif->bss_conf.beacon_int : 0;
2904                 spin_unlock_irqrestore(&priv->lock, flags);
2905
2906                 scan->suspend_time = 0;
2907                 scan->max_out_time = cpu_to_le32(200 * 1024);
2908                 if (!interval)
2909                         interval = suspend_time;
2910                 /*
2911                  * suspend time format:
2912                  *  0-19: beacon interval in usec (time before exec.)
2913                  * 20-23: 0
2914                  * 24-31: number of beacons (suspend between channels)
2915                  */
2916
2917                 extra = (suspend_time / interval) << 24;
2918                 scan_suspend_time = 0xFF0FFFFF &
2919                     (extra | ((suspend_time % interval) * 1024));
2920
2921                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2922                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2923                                scan_suspend_time, interval);
2924         }
2925
2926         if (priv->is_internal_short_scan) {
2927                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2928         } else if (priv->scan_request->n_ssids) {
2929                 int i, p = 0;
2930                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2931                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2932                         /* always does wildcard anyway */
2933                         if (!priv->scan_request->ssids[i].ssid_len)
2934                                 continue;
2935                         scan->direct_scan[p].id = WLAN_EID_SSID;
2936                         scan->direct_scan[p].len =
2937                                 priv->scan_request->ssids[i].ssid_len;
2938                         memcpy(scan->direct_scan[p].ssid,
2939                                priv->scan_request->ssids[i].ssid,
2940                                priv->scan_request->ssids[i].ssid_len);
2941                         n_probes++;
2942                         p++;
2943                 }
2944                 is_active = true;
2945         } else
2946                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2947
2948         /* We don't build a direct scan probe request; the uCode will do
2949          * that based on the direct_mask added to each channel entry */
2950         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2951         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2952         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2953
2954         /* flags + rate selection */
2955
2956         switch (priv->scan_band) {
2957         case IEEE80211_BAND_2GHZ:
2958                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2959                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2960                 scan->good_CRC_th = 0;
2961                 band = IEEE80211_BAND_2GHZ;
2962                 break;
2963         case IEEE80211_BAND_5GHZ:
2964                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2965                 /*
2966                  * If active scaning is requested but a certain channel
2967                  * is marked passive, we can do active scanning if we
2968                  * detect transmissions.
2969                  */
2970                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2971                                                 IWL_GOOD_CRC_TH_DISABLED;
2972                 band = IEEE80211_BAND_5GHZ;
2973                 break;
2974         default:
2975                 IWL_WARN(priv, "Invalid scan band\n");
2976                 goto done;
2977         }
2978
2979         if (!priv->is_internal_short_scan) {
2980                 scan->tx_cmd.len = cpu_to_le16(
2981                         iwl_fill_probe_req(priv,
2982                                 (struct ieee80211_mgmt *)scan->data,
2983                                 priv->scan_request->ie,
2984                                 priv->scan_request->ie_len,
2985                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2986         } else {
2987                 scan->tx_cmd.len = cpu_to_le16(
2988                         iwl_fill_probe_req(priv,
2989                                 (struct ieee80211_mgmt *)scan->data,
2990                                 NULL, 0,
2991                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2992         }
2993         /* select Rx antennas */
2994         scan->flags |= iwl3945_get_antenna_flags(priv);
2995
2996         scan->channel_count =
2997                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2998                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2999
3000         if (scan->channel_count == 0) {
3001                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3002                 goto done;
3003         }
3004
3005         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3006             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3007         cmd.data = scan;
3008         scan->len = cpu_to_le16(cmd.len);
3009
3010         set_bit(STATUS_SCAN_HW, &priv->status);
3011         if (iwl_send_cmd_sync(priv, &cmd))
3012                 goto done;
3013
3014         queue_delayed_work(priv->workqueue, &priv->scan_check,
3015                            IWL_SCAN_CHECK_WATCHDOG);
3016
3017         return;
3018
3019  done:
3020         /* can not perform scan make sure we clear scanning
3021          * bits from status so next scan request can be performed.
3022          * if we dont clear scanning status bit here all next scan
3023          * will fail
3024         */
3025         clear_bit(STATUS_SCAN_HW, &priv->status);
3026         clear_bit(STATUS_SCANNING, &priv->status);
3027
3028         /* inform mac80211 scan aborted */
3029         queue_work(priv->workqueue, &priv->scan_completed);
3030 }
3031
3032 static void iwl3945_bg_restart(struct work_struct *data)
3033 {
3034         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3035
3036         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3037                 return;
3038
3039         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3040                 mutex_lock(&priv->mutex);
3041                 priv->vif = NULL;
3042                 priv->is_open = 0;
3043                 mutex_unlock(&priv->mutex);
3044                 iwl3945_down(priv);
3045                 ieee80211_restart_hw(priv->hw);
3046         } else {
3047                 iwl3945_down(priv);
3048
3049                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3050                         return;
3051
3052                 mutex_lock(&priv->mutex);
3053                 __iwl3945_up(priv);
3054                 mutex_unlock(&priv->mutex);
3055         }
3056 }
3057
3058 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3059 {
3060         struct iwl_priv *priv =
3061             container_of(data, struct iwl_priv, rx_replenish);
3062
3063         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3064                 return;
3065
3066         mutex_lock(&priv->mutex);
3067         iwl3945_rx_replenish(priv);
3068         mutex_unlock(&priv->mutex);
3069 }
3070
3071 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3072 {
3073         int rc = 0;
3074         struct ieee80211_conf *conf = NULL;
3075
3076         if (!vif || !priv->is_open)
3077                 return;
3078
3079         if (vif->type == NL80211_IFTYPE_AP) {
3080                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3081                 return;
3082         }
3083
3084         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3085                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3086
3087         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3088                 return;
3089
3090         iwl_scan_cancel_timeout(priv, 200);
3091
3092         conf = ieee80211_get_hw_conf(priv->hw);
3093
3094         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3095         iwlcore_commit_rxon(priv);
3096
3097         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3098         iwl_setup_rxon_timing(priv, vif);
3099         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3100                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3101         if (rc)
3102                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3103                             "Attempting to continue.\n");
3104
3105         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3106
3107         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3108
3109         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3110                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3111
3112         if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3113                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3114         else
3115                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3116
3117         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3118                 if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3119                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3120                 else
3121                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3122
3123                 if (vif->type == NL80211_IFTYPE_ADHOC)
3124                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3125         }
3126
3127         iwlcore_commit_rxon(priv);
3128
3129         switch (vif->type) {
3130         case NL80211_IFTYPE_STATION:
3131                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3132                 break;
3133         case NL80211_IFTYPE_ADHOC:
3134                 iwl3945_send_beacon_cmd(priv);
3135                 break;
3136         default:
3137                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3138                         __func__, vif->type);
3139                 break;
3140         }
3141 }
3142
3143 /*****************************************************************************
3144  *
3145  * mac80211 entry point functions
3146  *
3147  *****************************************************************************/
3148
3149 #define UCODE_READY_TIMEOUT     (2 * HZ)
3150
3151 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3152 {
3153         struct iwl_priv *priv = hw->priv;
3154         int ret;
3155
3156         IWL_DEBUG_MAC80211(priv, "enter\n");
3157
3158         /* we should be verifying the device is ready to be opened */
3159         mutex_lock(&priv->mutex);
3160
3161         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3162          * ucode filename and max sizes are card-specific. */
3163
3164         if (!priv->ucode_code.len) {
3165                 ret = iwl3945_read_ucode(priv);
3166                 if (ret) {
3167                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3168                         mutex_unlock(&priv->mutex);
3169                         goto out_release_irq;
3170                 }
3171         }
3172
3173         ret = __iwl3945_up(priv);
3174
3175         mutex_unlock(&priv->mutex);
3176
3177         if (ret)
3178                 goto out_release_irq;
3179
3180         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3181
3182         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3183          * mac80211 will not be run successfully. */
3184         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3185                         test_bit(STATUS_READY, &priv->status),
3186                         UCODE_READY_TIMEOUT);
3187         if (!ret) {
3188                 if (!test_bit(STATUS_READY, &priv->status)) {
3189                         IWL_ERR(priv,
3190                                 "Wait for START_ALIVE timeout after %dms.\n",
3191                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3192                         ret = -ETIMEDOUT;
3193                         goto out_release_irq;
3194                 }
3195         }
3196
3197         /* ucode is running and will send rfkill notifications,
3198          * no need to poll the killswitch state anymore */
3199         cancel_delayed_work(&priv->_3945.rfkill_poll);
3200
3201         iwl_led_start(priv);
3202
3203         priv->is_open = 1;
3204         IWL_DEBUG_MAC80211(priv, "leave\n");
3205         return 0;
3206
3207 out_release_irq:
3208         priv->is_open = 0;
3209         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3210         return ret;
3211 }
3212
3213 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3214 {
3215         struct iwl_priv *priv = hw->priv;
3216
3217         IWL_DEBUG_MAC80211(priv, "enter\n");
3218
3219         if (!priv->is_open) {
3220                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3221                 return;
3222         }
3223
3224         priv->is_open = 0;
3225
3226         if (iwl_is_ready_rf(priv)) {
3227                 /* stop mac, cancel any scan request and clear
3228                  * RXON_FILTER_ASSOC_MSK BIT
3229                  */
3230                 mutex_lock(&priv->mutex);
3231                 iwl_scan_cancel_timeout(priv, 100);
3232                 mutex_unlock(&priv->mutex);
3233         }
3234
3235         iwl3945_down(priv);
3236
3237         flush_workqueue(priv->workqueue);
3238
3239         /* start polling the killswitch state again */
3240         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3241                            round_jiffies_relative(2 * HZ));
3242
3243         IWL_DEBUG_MAC80211(priv, "leave\n");
3244 }
3245
3246 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3247 {
3248         struct iwl_priv *priv = hw->priv;
3249
3250         IWL_DEBUG_MAC80211(priv, "enter\n");
3251
3252         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3253                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3254
3255         if (iwl3945_tx_skb(priv, skb))
3256                 dev_kfree_skb_any(skb);
3257
3258         IWL_DEBUG_MAC80211(priv, "leave\n");
3259         return NETDEV_TX_OK;
3260 }
3261
3262 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3263 {
3264         int rc = 0;
3265
3266         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3267                 return;
3268
3269         /* The following should be done only at AP bring up */
3270         if (!(iwl_is_associated(priv))) {
3271
3272                 /* RXON - unassoc (to set timing command) */
3273                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3274                 iwlcore_commit_rxon(priv);
3275
3276                 /* RXON Timing */
3277                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3278                 iwl_setup_rxon_timing(priv, vif);
3279                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3280                                       sizeof(priv->rxon_timing),
3281                                       &priv->rxon_timing);
3282                 if (rc)
3283                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3284                                         "Attempting to continue.\n");
3285
3286                 priv->staging_rxon.assoc_id = 0;
3287
3288                 if (vif->bss_conf.assoc_capability &
3289                                         WLAN_CAPABILITY_SHORT_PREAMBLE)
3290                         priv->staging_rxon.flags |=
3291                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3292                 else
3293                         priv->staging_rxon.flags &=
3294                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3295
3296                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3297                         if (vif->bss_conf.assoc_capability &
3298                                         WLAN_CAPABILITY_SHORT_SLOT_TIME)
3299                                 priv->staging_rxon.flags |=
3300                                         RXON_FLG_SHORT_SLOT_MSK;
3301                         else
3302                                 priv->staging_rxon.flags &=
3303                                         ~RXON_FLG_SHORT_SLOT_MSK;
3304
3305                         if (vif->type == NL80211_IFTYPE_ADHOC)
3306                                 priv->staging_rxon.flags &=
3307                                         ~RXON_FLG_SHORT_SLOT_MSK;
3308                 }
3309                 /* restore RXON assoc */
3310                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3311                 iwlcore_commit_rxon(priv);
3312         }
3313         iwl3945_send_beacon_cmd(priv);
3314
3315         /* FIXME - we need to add code here to detect a totally new
3316          * configuration, reset the AP, unassoc, rxon timing, assoc,
3317          * clear sta table, add BCAST sta... */
3318 }
3319
3320 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3321                                struct ieee80211_vif *vif,
3322                                struct ieee80211_sta *sta,
3323                                struct ieee80211_key_conf *key)
3324 {
3325         struct iwl_priv *priv = hw->priv;
3326         int ret = 0;
3327         u8 sta_id = IWL_INVALID_STATION;
3328         u8 static_key;
3329
3330         IWL_DEBUG_MAC80211(priv, "enter\n");
3331
3332         if (iwl3945_mod_params.sw_crypto) {
3333                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3334                 return -EOPNOTSUPP;
3335         }
3336
3337         static_key = !iwl_is_associated(priv);
3338
3339         if (!static_key) {
3340                 if (!sta) {
3341                         sta_id = priv->hw_params.bcast_sta_id;
3342                 } else {
3343                         sta_id = iwl_sta_id(sta);
3344                         if (sta_id == IWL_INVALID_STATION) {
3345                                 IWL_DEBUG_MAC80211(priv,
3346                                                    "leave - %pM not in station map.\n",
3347                                                    sta->addr);
3348                                 return -EINVAL;
3349                         }
3350                 }
3351         }
3352
3353         mutex_lock(&priv->mutex);
3354         iwl_scan_cancel_timeout(priv, 100);
3355
3356         switch (cmd) {
3357         case SET_KEY:
3358                 if (static_key)
3359                         ret = iwl3945_set_static_key(priv, key);
3360                 else
3361                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3362                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3363                 break;
3364         case DISABLE_KEY:
3365                 if (static_key)
3366                         ret = iwl3945_remove_static_key(priv);
3367                 else
3368                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3369                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3370                 break;
3371         default:
3372                 ret = -EINVAL;
3373         }
3374
3375         mutex_unlock(&priv->mutex);
3376         IWL_DEBUG_MAC80211(priv, "leave\n");
3377
3378         return ret;
3379 }
3380
3381 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3382                                struct ieee80211_vif *vif,
3383                                struct ieee80211_sta *sta)
3384 {
3385         struct iwl_priv *priv = hw->priv;
3386         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3387         int ret;
3388         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3389         u8 sta_id;
3390
3391         sta_priv->common.sta_id = IWL_INVALID_STATION;
3392
3393         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3394                         sta->addr);
3395
3396         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3397                                      &sta_id);
3398         if (ret) {
3399                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3400                         sta->addr, ret);
3401                 /* Should we return success if return code is EEXIST ? */
3402                 return ret;
3403         }
3404
3405         sta_priv->common.sta_id = sta_id;
3406
3407         /* Initialize rate scaling */
3408         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3409                        sta->addr);
3410         iwl3945_rs_rate_init(priv, sta, sta_id);
3411
3412         return 0;
3413 }
3414 /*****************************************************************************
3415  *
3416  * sysfs attributes
3417  *
3418  *****************************************************************************/
3419
3420 #ifdef CONFIG_IWLWIFI_DEBUG
3421
3422 /*
3423  * The following adds a new attribute to the sysfs representation
3424  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3425  * used for controlling the debug level.
3426  *
3427  * See the level definitions in iwl for details.
3428  *
3429  * The debug_level being managed using sysfs below is a per device debug
3430  * level that is used instead of the global debug level if it (the per
3431  * device debug level) is set.
3432  */
3433 static ssize_t show_debug_level(struct device *d,
3434                                 struct device_attribute *attr, char *buf)
3435 {
3436         struct iwl_priv *priv = dev_get_drvdata(d);
3437         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3438 }
3439 static ssize_t store_debug_level(struct device *d,
3440                                 struct device_attribute *attr,
3441                                  const char *buf, size_t count)
3442 {
3443         struct iwl_priv *priv = dev_get_drvdata(d);
3444         unsigned long val;
3445         int ret;
3446
3447         ret = strict_strtoul(buf, 0, &val);
3448         if (ret)
3449                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3450         else {
3451                 priv->debug_level = val;
3452                 if (iwl_alloc_traffic_mem(priv))
3453                         IWL_ERR(priv,
3454                                 "Not enough memory to generate traffic log\n");
3455         }
3456         return strnlen(buf, count);
3457 }
3458
3459 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3460                         show_debug_level, store_debug_level);
3461
3462 #endif /* CONFIG_IWLWIFI_DEBUG */
3463
3464 static ssize_t show_temperature(struct device *d,
3465                                 struct device_attribute *attr, char *buf)
3466 {
3467         struct iwl_priv *priv = dev_get_drvdata(d);
3468
3469         if (!iwl_is_alive(priv))
3470                 return -EAGAIN;
3471
3472         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3473 }
3474
3475 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3476
3477 static ssize_t show_tx_power(struct device *d,
3478                              struct device_attribute *attr, char *buf)
3479 {
3480         struct iwl_priv *priv = dev_get_drvdata(d);
3481         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3482 }
3483
3484 static ssize_t store_tx_power(struct device *d,
3485                               struct device_attribute *attr,
3486                               const char *buf, size_t count)
3487 {
3488         struct iwl_priv *priv = dev_get_drvdata(d);
3489         char *p = (char *)buf;
3490         u32 val;
3491
3492         val = simple_strtoul(p, &p, 10);
3493         if (p == buf)
3494                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3495         else
3496                 iwl3945_hw_reg_set_txpower(priv, val);
3497
3498         return count;
3499 }
3500
3501 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3502
3503 static ssize_t show_flags(struct device *d,
3504                           struct device_attribute *attr, char *buf)
3505 {
3506         struct iwl_priv *priv = dev_get_drvdata(d);
3507
3508         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3509 }
3510
3511 static ssize_t store_flags(struct device *d,
3512                            struct device_attribute *attr,
3513                            const char *buf, size_t count)
3514 {
3515         struct iwl_priv *priv = dev_get_drvdata(d);
3516         u32 flags = simple_strtoul(buf, NULL, 0);
3517
3518         mutex_lock(&priv->mutex);
3519         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3520                 /* Cancel any currently running scans... */
3521                 if (iwl_scan_cancel_timeout(priv, 100))
3522                         IWL_WARN(priv, "Could not cancel scan.\n");
3523                 else {
3524                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3525                                        flags);
3526                         priv->staging_rxon.flags = cpu_to_le32(flags);
3527                         iwlcore_commit_rxon(priv);
3528                 }
3529         }
3530         mutex_unlock(&priv->mutex);
3531
3532         return count;
3533 }
3534
3535 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3536
3537 static ssize_t show_filter_flags(struct device *d,
3538                                  struct device_attribute *attr, char *buf)
3539 {
3540         struct iwl_priv *priv = dev_get_drvdata(d);
3541
3542         return sprintf(buf, "0x%04X\n",
3543                 le32_to_cpu(priv->active_rxon.filter_flags));
3544 }
3545
3546 static ssize_t store_filter_flags(struct device *d,
3547                                   struct device_attribute *attr,
3548                                   const char *buf, size_t count)
3549 {
3550         struct iwl_priv *priv = dev_get_drvdata(d);
3551         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3552
3553         mutex_lock(&priv->mutex);
3554         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3555                 /* Cancel any currently running scans... */
3556                 if (iwl_scan_cancel_timeout(priv, 100))
3557                         IWL_WARN(priv, "Could not cancel scan.\n");
3558                 else {
3559                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3560                                        "0x%04X\n", filter_flags);
3561                         priv->staging_rxon.filter_flags =
3562                                 cpu_to_le32(filter_flags);
3563                         iwlcore_commit_rxon(priv);
3564                 }
3565         }
3566         mutex_unlock(&priv->mutex);
3567
3568         return count;
3569 }
3570
3571 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3572                    store_filter_flags);
3573
3574 static ssize_t show_measurement(struct device *d,
3575                                 struct device_attribute *attr, char *buf)
3576 {
3577         struct iwl_priv *priv = dev_get_drvdata(d);
3578         struct iwl_spectrum_notification measure_report;
3579         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3580         u8 *data = (u8 *)&measure_report;
3581         unsigned long flags;
3582
3583         spin_lock_irqsave(&priv->lock, flags);
3584         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3585                 spin_unlock_irqrestore(&priv->lock, flags);
3586                 return 0;
3587         }
3588         memcpy(&measure_report, &priv->measure_report, size);
3589         priv->measurement_status = 0;
3590         spin_unlock_irqrestore(&priv->lock, flags);
3591
3592         while (size && (PAGE_SIZE - len)) {
3593                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3594                                    PAGE_SIZE - len, 1);
3595                 len = strlen(buf);
3596                 if (PAGE_SIZE - len)
3597                         buf[len++] = '\n';
3598
3599                 ofs += 16;
3600                 size -= min(size, 16U);
3601         }
3602
3603         return len;
3604 }
3605
3606 static ssize_t store_measurement(struct device *d,
3607                                  struct device_attribute *attr,
3608                                  const char *buf, size_t count)
3609 {
3610         struct iwl_priv *priv = dev_get_drvdata(d);
3611         struct ieee80211_measurement_params params = {
3612                 .channel = le16_to_cpu(priv->active_rxon.channel),
3613                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3614                 .duration = cpu_to_le16(1),
3615         };
3616         u8 type = IWL_MEASURE_BASIC;
3617         u8 buffer[32];
3618         u8 channel;
3619
3620         if (count) {
3621                 char *p = buffer;
3622                 strncpy(buffer, buf, min(sizeof(buffer), count));
3623                 channel = simple_strtoul(p, NULL, 0);
3624                 if (channel)
3625                         params.channel = channel;
3626
3627                 p = buffer;
3628                 while (*p && *p != ' ')
3629                         p++;
3630                 if (*p)
3631                         type = simple_strtoul(p + 1, NULL, 0);
3632         }
3633
3634         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3635                        "channel %d (for '%s')\n", type, params.channel, buf);
3636         iwl3945_get_measurement(priv, &params, type);
3637
3638         return count;
3639 }
3640
3641 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3642                    show_measurement, store_measurement);
3643
3644 static ssize_t store_retry_rate(struct device *d,
3645                                 struct device_attribute *attr,
3646                                 const char *buf, size_t count)
3647 {
3648         struct iwl_priv *priv = dev_get_drvdata(d);
3649
3650         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3651         if (priv->retry_rate <= 0)
3652                 priv->retry_rate = 1;
3653
3654         return count;
3655 }
3656
3657 static ssize_t show_retry_rate(struct device *d,
3658                                struct device_attribute *attr, char *buf)
3659 {
3660         struct iwl_priv *priv = dev_get_drvdata(d);
3661         return sprintf(buf, "%d", priv->retry_rate);
3662 }
3663
3664 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3665                    store_retry_rate);
3666
3667
3668 static ssize_t show_channels(struct device *d,
3669                              struct device_attribute *attr, char *buf)
3670 {
3671         /* all this shit doesn't belong into sysfs anyway */
3672         return 0;
3673 }
3674
3675 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3676
3677 static ssize_t show_antenna(struct device *d,
3678                             struct device_attribute *attr, char *buf)
3679 {
3680         struct iwl_priv *priv = dev_get_drvdata(d);
3681
3682         if (!iwl_is_alive(priv))
3683                 return -EAGAIN;
3684
3685         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3686 }
3687
3688 static ssize_t store_antenna(struct device *d,
3689                              struct device_attribute *attr,
3690                              const char *buf, size_t count)
3691 {
3692         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3693         int ant;
3694
3695         if (count == 0)
3696                 return 0;
3697
3698         if (sscanf(buf, "%1i", &ant) != 1) {
3699                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3700                 return count;
3701         }
3702
3703         if ((ant >= 0) && (ant <= 2)) {
3704                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3705                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3706         } else
3707                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3708
3709
3710         return count;
3711 }
3712
3713 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3714
3715 static ssize_t show_status(struct device *d,
3716                            struct device_attribute *attr, char *buf)
3717 {
3718         struct iwl_priv *priv = dev_get_drvdata(d);
3719         if (!iwl_is_alive(priv))
3720                 return -EAGAIN;
3721         return sprintf(buf, "0x%08x\n", (int)priv->status);
3722 }
3723
3724 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3725
3726 static ssize_t dump_error_log(struct device *d,
3727                               struct device_attribute *attr,
3728                               const char *buf, size_t count)
3729 {
3730         struct iwl_priv *priv = dev_get_drvdata(d);
3731         char *p = (char *)buf;
3732
3733         if (p[0] == '1')
3734                 iwl3945_dump_nic_error_log(priv);
3735
3736         return strnlen(buf, count);
3737 }
3738
3739 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3740
3741 /*****************************************************************************
3742  *
3743  * driver setup and tear down
3744  *
3745  *****************************************************************************/
3746
3747 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3748 {
3749         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3750
3751         init_waitqueue_head(&priv->wait_command_queue);
3752
3753         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3754         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3755         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3756         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3757         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3758         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3759         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3760         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3761         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3762         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3763
3764         iwl3945_hw_setup_deferred_work(priv);
3765
3766         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3767                 init_timer(&priv->monitor_recover);
3768                 priv->monitor_recover.data = (unsigned long)priv;
3769                 priv->monitor_recover.function =
3770                         priv->cfg->ops->lib->recover_from_tx_stall;
3771         }
3772
3773         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3774                      iwl3945_irq_tasklet, (unsigned long)priv);
3775 }
3776
3777 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3778 {
3779         iwl3945_hw_cancel_deferred_work(priv);
3780
3781         cancel_delayed_work_sync(&priv->init_alive_start);
3782         cancel_delayed_work(&priv->scan_check);
3783         cancel_delayed_work(&priv->alive_start);
3784         cancel_work_sync(&priv->start_internal_scan);
3785         cancel_work_sync(&priv->beacon_update);
3786         if (priv->cfg->ops->lib->recover_from_tx_stall)
3787                 del_timer_sync(&priv->monitor_recover);
3788 }
3789
3790 static struct attribute *iwl3945_sysfs_entries[] = {
3791         &dev_attr_antenna.attr,
3792         &dev_attr_channels.attr,
3793         &dev_attr_dump_errors.attr,
3794         &dev_attr_flags.attr,
3795         &dev_attr_filter_flags.attr,
3796         &dev_attr_measurement.attr,
3797         &dev_attr_retry_rate.attr,
3798         &dev_attr_status.attr,
3799         &dev_attr_temperature.attr,
3800         &dev_attr_tx_power.attr,
3801 #ifdef CONFIG_IWLWIFI_DEBUG
3802         &dev_attr_debug_level.attr,
3803 #endif
3804         NULL
3805 };
3806
3807 static struct attribute_group iwl3945_attribute_group = {
3808         .name = NULL,           /* put in device directory */
3809         .attrs = iwl3945_sysfs_entries,
3810 };
3811
3812 static struct ieee80211_ops iwl3945_hw_ops = {
3813         .tx = iwl3945_mac_tx,
3814         .start = iwl3945_mac_start,
3815         .stop = iwl3945_mac_stop,
3816         .add_interface = iwl_mac_add_interface,
3817         .remove_interface = iwl_mac_remove_interface,
3818         .config = iwl_mac_config,
3819         .configure_filter = iwl_configure_filter,
3820         .set_key = iwl3945_mac_set_key,
3821         .conf_tx = iwl_mac_conf_tx,
3822         .reset_tsf = iwl_mac_reset_tsf,
3823         .bss_info_changed = iwl_bss_info_changed,
3824         .hw_scan = iwl_mac_hw_scan,
3825         .sta_add = iwl3945_mac_sta_add,
3826         .sta_remove = iwl_mac_sta_remove,
3827 };
3828
3829 static int iwl3945_init_drv(struct iwl_priv *priv)
3830 {
3831         int ret;
3832         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3833
3834         priv->retry_rate = 1;
3835         priv->ibss_beacon = NULL;
3836
3837         spin_lock_init(&priv->sta_lock);
3838         spin_lock_init(&priv->hcmd_lock);
3839
3840         INIT_LIST_HEAD(&priv->free_frames);
3841
3842         mutex_init(&priv->mutex);
3843         mutex_init(&priv->sync_cmd_mutex);
3844
3845         priv->ieee_channels = NULL;
3846         priv->ieee_rates = NULL;
3847         priv->band = IEEE80211_BAND_2GHZ;
3848
3849         priv->iw_mode = NL80211_IFTYPE_STATION;
3850         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3851
3852         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3853
3854         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3855                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3856                          eeprom->version);
3857                 ret = -EINVAL;
3858                 goto err;
3859         }
3860         ret = iwl_init_channel_map(priv);
3861         if (ret) {
3862                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3863                 goto err;
3864         }
3865
3866         /* Set up txpower settings in driver for all channels */
3867         if (iwl3945_txpower_set_from_eeprom(priv)) {
3868                 ret = -EIO;
3869                 goto err_free_channel_map;
3870         }
3871
3872         ret = iwlcore_init_geos(priv);
3873         if (ret) {
3874                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3875                 goto err_free_channel_map;
3876         }
3877         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3878
3879         return 0;
3880
3881 err_free_channel_map:
3882         iwl_free_channel_map(priv);
3883 err:
3884         return ret;
3885 }
3886
3887 #define IWL3945_MAX_PROBE_REQUEST       200
3888
3889 static int iwl3945_setup_mac(struct iwl_priv *priv)
3890 {
3891         int ret;
3892         struct ieee80211_hw *hw = priv->hw;
3893
3894         hw->rate_control_algorithm = "iwl-3945-rs";
3895         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3896         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3897
3898         /* Tell mac80211 our characteristics */
3899         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3900                     IEEE80211_HW_SPECTRUM_MGMT;
3901
3902         if (!priv->cfg->broken_powersave)
3903                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3904                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3905
3906         hw->wiphy->interface_modes =
3907                 BIT(NL80211_IFTYPE_STATION) |
3908                 BIT(NL80211_IFTYPE_ADHOC);
3909
3910         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3911                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3912
3913         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3914         /* we create the 802.11 header and a zero-length SSID element */
3915         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3916
3917         /* Default value; 4 EDCA QOS priorities */
3918         hw->queues = 4;
3919
3920         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3921                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3922                         &priv->bands[IEEE80211_BAND_2GHZ];
3923
3924         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3925                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3926                         &priv->bands[IEEE80211_BAND_5GHZ];
3927
3928         ret = ieee80211_register_hw(priv->hw);
3929         if (ret) {
3930                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3931                 return ret;
3932         }
3933         priv->mac80211_registered = 1;
3934
3935         return 0;
3936 }
3937
3938 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3939 {
3940         int err = 0;
3941         struct iwl_priv *priv;
3942         struct ieee80211_hw *hw;
3943         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3944         struct iwl3945_eeprom *eeprom;
3945         unsigned long flags;
3946
3947         /***********************
3948          * 1. Allocating HW data
3949          * ********************/
3950
3951         /* mac80211 allocates memory for this device instance, including
3952          *   space for this driver's private structure */
3953         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3954         if (hw == NULL) {
3955                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3956                 err = -ENOMEM;
3957                 goto out;
3958         }
3959         priv = hw->priv;
3960         SET_IEEE80211_DEV(hw, &pdev->dev);
3961
3962         /*
3963          * Disabling hardware scan means that mac80211 will perform scans
3964          * "the hard way", rather than using device's scan.
3965          */
3966         if (iwl3945_mod_params.disable_hw_scan) {
3967                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3968                 iwl3945_hw_ops.hw_scan = NULL;
3969         }
3970
3971
3972         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3973         priv->cfg = cfg;
3974         priv->pci_dev = pdev;
3975         priv->inta_mask = CSR_INI_SET_MASK;
3976
3977 #ifdef CONFIG_IWLWIFI_DEBUG
3978         atomic_set(&priv->restrict_refcnt, 0);
3979 #endif
3980         if (iwl_alloc_traffic_mem(priv))
3981                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3982
3983         /***************************
3984          * 2. Initializing PCI bus
3985          * *************************/
3986         if (pci_enable_device(pdev)) {
3987                 err = -ENODEV;
3988                 goto out_ieee80211_free_hw;
3989         }
3990
3991         pci_set_master(pdev);
3992
3993         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3994         if (!err)
3995                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3996         if (err) {
3997                 IWL_WARN(priv, "No suitable DMA available.\n");
3998                 goto out_pci_disable_device;
3999         }
4000
4001         pci_set_drvdata(pdev, priv);
4002         err = pci_request_regions(pdev, DRV_NAME);
4003         if (err)
4004                 goto out_pci_disable_device;
4005
4006         /***********************
4007          * 3. Read REV Register
4008          * ********************/
4009         priv->hw_base = pci_iomap(pdev, 0, 0);
4010         if (!priv->hw_base) {
4011                 err = -ENODEV;
4012                 goto out_pci_release_regions;
4013         }
4014
4015         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4016                         (unsigned long long) pci_resource_len(pdev, 0));
4017         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4018
4019         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4020          * PCI Tx retries from interfering with C3 CPU state */
4021         pci_write_config_byte(pdev, 0x41, 0x00);
4022
4023         /* these spin locks will be used in apm_ops.init and EEPROM access
4024          * we should init now
4025          */
4026         spin_lock_init(&priv->reg_lock);
4027         spin_lock_init(&priv->lock);
4028
4029         /*
4030          * stop and reset the on-board processor just in case it is in a
4031          * strange state ... like being left stranded by a primary kernel
4032          * and this is now the kdump kernel trying to start up
4033          */
4034         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4035
4036         /***********************
4037          * 4. Read EEPROM
4038          * ********************/
4039
4040         /* Read the EEPROM */
4041         err = iwl_eeprom_init(priv);
4042         if (err) {
4043                 IWL_ERR(priv, "Unable to init EEPROM\n");
4044                 goto out_iounmap;
4045         }
4046         /* MAC Address location in EEPROM same for 3945/4965 */
4047         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4048         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4049         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4050         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4051
4052         /***********************
4053          * 5. Setup HW Constants
4054          * ********************/
4055         /* Device-specific setup */
4056         if (iwl3945_hw_set_hw_params(priv)) {
4057                 IWL_ERR(priv, "failed to set hw settings\n");
4058                 goto out_eeprom_free;
4059         }
4060
4061         /***********************
4062          * 6. Setup priv
4063          * ********************/
4064
4065         err = iwl3945_init_drv(priv);
4066         if (err) {
4067                 IWL_ERR(priv, "initializing driver failed\n");
4068                 goto out_unset_hw_params;
4069         }
4070
4071         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4072                 priv->cfg->name);
4073
4074         /***********************
4075          * 7. Setup Services
4076          * ********************/
4077
4078         spin_lock_irqsave(&priv->lock, flags);
4079         iwl_disable_interrupts(priv);
4080         spin_unlock_irqrestore(&priv->lock, flags);
4081
4082         pci_enable_msi(priv->pci_dev);
4083
4084         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4085                           IRQF_SHARED, DRV_NAME, priv);
4086         if (err) {
4087                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4088                 goto out_disable_msi;
4089         }
4090
4091         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4092         if (err) {
4093                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4094                 goto out_release_irq;
4095         }
4096
4097         iwl_set_rxon_channel(priv,
4098                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4099         iwl3945_setup_deferred_work(priv);
4100         iwl3945_setup_rx_handlers(priv);
4101         iwl_power_initialize(priv);
4102
4103         /*********************************
4104          * 8. Setup and Register mac80211
4105          * *******************************/
4106
4107         iwl_enable_interrupts(priv);
4108
4109         err = iwl3945_setup_mac(priv);
4110         if (err)
4111                 goto  out_remove_sysfs;
4112
4113         err = iwl_dbgfs_register(priv, DRV_NAME);
4114         if (err)
4115                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4116
4117         /* Start monitoring the killswitch */
4118         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4119                            2 * HZ);
4120
4121         return 0;
4122
4123  out_remove_sysfs:
4124         destroy_workqueue(priv->workqueue);
4125         priv->workqueue = NULL;
4126         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4127  out_release_irq:
4128         free_irq(priv->pci_dev->irq, priv);
4129  out_disable_msi:
4130         pci_disable_msi(priv->pci_dev);
4131         iwlcore_free_geos(priv);
4132         iwl_free_channel_map(priv);
4133  out_unset_hw_params:
4134         iwl3945_unset_hw_params(priv);
4135  out_eeprom_free:
4136         iwl_eeprom_free(priv);
4137  out_iounmap:
4138         pci_iounmap(pdev, priv->hw_base);
4139  out_pci_release_regions:
4140         pci_release_regions(pdev);
4141  out_pci_disable_device:
4142         pci_set_drvdata(pdev, NULL);
4143         pci_disable_device(pdev);
4144  out_ieee80211_free_hw:
4145         iwl_free_traffic_mem(priv);
4146         ieee80211_free_hw(priv->hw);
4147  out:
4148         return err;
4149 }
4150
4151 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4152 {
4153         struct iwl_priv *priv = pci_get_drvdata(pdev);
4154         unsigned long flags;
4155
4156         if (!priv)
4157                 return;
4158
4159         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4160
4161         iwl_dbgfs_unregister(priv);
4162
4163         set_bit(STATUS_EXIT_PENDING, &priv->status);
4164
4165         if (priv->mac80211_registered) {
4166                 ieee80211_unregister_hw(priv->hw);
4167                 priv->mac80211_registered = 0;
4168         } else {
4169                 iwl3945_down(priv);
4170         }
4171
4172         /*
4173          * Make sure device is reset to low power before unloading driver.
4174          * This may be redundant with iwl_down(), but there are paths to
4175          * run iwl_down() without calling apm_ops.stop(), and there are
4176          * paths to avoid running iwl_down() at all before leaving driver.
4177          * This (inexpensive) call *makes sure* device is reset.
4178          */
4179         priv->cfg->ops->lib->apm_ops.stop(priv);
4180
4181         /* make sure we flush any pending irq or
4182          * tasklet for the driver
4183          */
4184         spin_lock_irqsave(&priv->lock, flags);
4185         iwl_disable_interrupts(priv);
4186         spin_unlock_irqrestore(&priv->lock, flags);
4187
4188         iwl_synchronize_irq(priv);
4189
4190         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4191
4192         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4193
4194         iwl3945_dealloc_ucode_pci(priv);
4195
4196         if (priv->rxq.bd)
4197                 iwl3945_rx_queue_free(priv, &priv->rxq);
4198         iwl3945_hw_txq_ctx_free(priv);
4199
4200         iwl3945_unset_hw_params(priv);
4201
4202         /*netif_stop_queue(dev); */
4203         flush_workqueue(priv->workqueue);
4204
4205         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4206          * priv->workqueue... so we can't take down the workqueue
4207          * until now... */
4208         destroy_workqueue(priv->workqueue);
4209         priv->workqueue = NULL;
4210         iwl_free_traffic_mem(priv);
4211
4212         free_irq(pdev->irq, priv);
4213         pci_disable_msi(pdev);
4214
4215         pci_iounmap(pdev, priv->hw_base);
4216         pci_release_regions(pdev);
4217         pci_disable_device(pdev);
4218         pci_set_drvdata(pdev, NULL);
4219
4220         iwl_free_channel_map(priv);
4221         iwlcore_free_geos(priv);
4222         kfree(priv->scan_cmd);
4223         if (priv->ibss_beacon)
4224                 dev_kfree_skb(priv->ibss_beacon);
4225
4226         ieee80211_free_hw(priv->hw);
4227 }
4228
4229
4230 /*****************************************************************************
4231  *
4232  * driver and module entry point
4233  *
4234  *****************************************************************************/
4235
4236 static struct pci_driver iwl3945_driver = {
4237         .name = DRV_NAME,
4238         .id_table = iwl3945_hw_card_ids,
4239         .probe = iwl3945_pci_probe,
4240         .remove = __devexit_p(iwl3945_pci_remove),
4241 #ifdef CONFIG_PM
4242         .suspend = iwl_pci_suspend,
4243         .resume = iwl_pci_resume,
4244 #endif
4245 };
4246
4247 static int __init iwl3945_init(void)
4248 {
4249
4250         int ret;
4251         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4252         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4253
4254         ret = iwl3945_rate_control_register();
4255         if (ret) {
4256                 printk(KERN_ERR DRV_NAME
4257                        "Unable to register rate control algorithm: %d\n", ret);
4258                 return ret;
4259         }
4260
4261         ret = pci_register_driver(&iwl3945_driver);
4262         if (ret) {
4263                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4264                 goto error_register;
4265         }
4266
4267         return ret;
4268
4269 error_register:
4270         iwl3945_rate_control_unregister();
4271         return ret;
4272 }
4273
4274 static void __exit iwl3945_exit(void)
4275 {
4276         pci_unregister_driver(&iwl3945_driver);
4277         iwl3945_rate_control_unregister();
4278 }
4279
4280 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4281
4282 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4283 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4284 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4285 MODULE_PARM_DESC(swcrypto,
4286                  "using software crypto (default 1 [software])\n");
4287 #ifdef CONFIG_IWLWIFI_DEBUG
4288 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4289 MODULE_PARM_DESC(debug, "debug output mask");
4290 #endif
4291 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4292                    int, S_IRUGO);
4293 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4294 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4295 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4296
4297 module_exit(iwl3945_exit);
4298 module_init(iwl3945_init);