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 }
 852
 853 static void iwl3945_bg_beacon_update(struct work_struct *work)
 854 {
 855         struct iwl_priv *priv =
 856                 container_of(work, struct iwl_priv, beacon_update);
 857         struct sk_buff *beacon;
 858
 859         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 860         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 861
 862         if (!beacon) {
 863                 IWL_ERR(priv, "update beacon failed\n");
 864                 return;
 865         }
 866
 867         mutex_lock(&priv->mutex);
 868         /* new beacon skb is allocated every time; dispose previous.*/
 869         if (priv->ibss_beacon)
 870                 dev_kfree_skb(priv->ibss_beacon);
 871
 872         priv->ibss_beacon = beacon;
 873         mutex_unlock(&priv->mutex);
 874
 875         iwl3945_send_beacon_cmd(priv);
 876 }
 877
 878 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 879                                 struct iwl_rx_mem_buffer *rxb)
 880 {
 881 #ifdef CONFIG_IWLWIFI_DEBUG
 882         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 883         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 884         u8 rate = beacon->beacon_notify_hdr.rate;
 885
 886         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 887                 "tsf %d %d rate %d\n",
 888                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 889                 beacon->beacon_notify_hdr.failure_frame,
 890                 le32_to_cpu(beacon->ibss_mgr_status),
 891                 le32_to_cpu(beacon->high_tsf),
 892                 le32_to_cpu(beacon->low_tsf), rate);
 893 #endif
 894
 895         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 896             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 897                 queue_work(priv->workqueue, &priv->beacon_update);
 898 }
 899
 900 /* Handle notification from uCode that card's power state is changing
 901  * due to software, hardware, or critical temperature RFKILL */
 902 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 903                                     struct iwl_rx_mem_buffer *rxb)
 904 {
 905         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 906         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 907         unsigned long status = priv->status;
 908
 909         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 910                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 911                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 912
 913         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 914                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 915
 916         if (flags & HW_CARD_DISABLED)
 917                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 918         else
 919                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 920
 921
 922         iwl_scan_cancel(priv);
 923
 924         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 925              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 926                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 927                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 928         else
 929                 wake_up_interruptible(&priv->wait_command_queue);
 930 }
 931
 932 /**
 933  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 934  *
 935  * Setup the RX handlers for each of the reply types sent from the uCode
 936  * to the host.
 937  *
 938  * This function chains into the hardware specific files for them to setup
 939  * any hardware specific handlers as well.
 940  */
 941 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 942 {
 943         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 944         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 945         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 946         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 947         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 948                         iwl_rx_spectrum_measure_notif;
 949         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 950         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 951             iwl_rx_pm_debug_statistics_notif;
 952         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 953
 954         /*
 955          * The same handler is used for both the REPLY to a discrete
 956          * statistics request from the host as well as for the periodic
 957          * statistics notifications (after received beacons) from the uCode.
 958          */
 959         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 960         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 961
 962         iwl_setup_rx_scan_handlers(priv);
 963         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 964
 965         /* Set up hardware specific Rx handlers */
 966         iwl3945_hw_rx_handler_setup(priv);
 967 }
 968
 969 /************************** RX-FUNCTIONS ****************************/
 970 /*
 971  * Rx theory of operation
 972  *
 973  * The host allocates 32 DMA target addresses and passes the host address
 974  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 975  * 0 to 31
 976  *
 977  * Rx Queue Indexes
 978  * The host/firmware share two index registers for managing the Rx buffers.
 979  *
 980  * The READ index maps to the first position that the firmware may be writing
 981  * to -- the driver can read up to (but not including) this position and get
 982  * good data.
 983  * The READ index is managed by the firmware once the card is enabled.
 984  *
 985  * The WRITE index maps to the last position the driver has read from -- the
 986  * position preceding WRITE is the last slot the firmware can place a packet.
 987  *
 988  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 989  * WRITE = READ.
 990  *
 991  * During initialization, the host sets up the READ queue position to the first
 992  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 993  *
 994  * When the firmware places a packet in a buffer, it will advance the READ index
 995  * and fire the RX interrupt.  The driver can then query the READ index and
 996  * process as many packets as possible, moving the WRITE index forward as it
 997  * resets the Rx queue buffers with new memory.
 998  *
 999  * The management in the driver is as follows:
1000  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1001  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1002  *   to replenish the iwl->rxq->rx_free.
1003  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1004  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1005  *   'processed' and 'read' driver indexes as well)
1006  * + A received packet is processed and handed to the kernel network stack,
1007  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1008  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1009  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1010  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1011  *   were enough free buffers and RX_STALLED is set it is cleared.
1012  *
1013  *
1014  * Driver sequence:
1015  *
1016  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1017  *                            iwl3945_rx_queue_restock
1018  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1019  *                            queue, updates firmware pointers, and updates
1020  *                            the WRITE index.  If insufficient rx_free buffers
1021  *                            are available, schedules iwl3945_rx_replenish
1022  *
1023  * -- enable interrupts --
1024  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1025  *                            READ INDEX, detaching the SKB from the pool.
1026  *                            Moves the packet buffer from queue to rx_used.
1027  *                            Calls iwl3945_rx_queue_restock to refill any empty
1028  *                            slots.
1029  * ...
1030  *
1031  */
1032
1033 /**
1034  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1035  */
1036 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1037                                           dma_addr_t dma_addr)
1038 {
1039         return cpu_to_le32((u32)dma_addr);
1040 }
1041
1042 /**
1043  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1044  *
1045  * If there are slots in the RX queue that need to be restocked,
1046  * and we have free pre-allocated buffers, fill the ranks as much
1047  * as we can, pulling from rx_free.
1048  *
1049  * This moves the 'write' index forward to catch up with 'processed', and
1050  * also updates the memory address in the firmware to reference the new
1051  * target buffer.
1052  */
1053 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1054 {
1055         struct iwl_rx_queue *rxq = &priv->rxq;
1056         struct list_head *element;
1057         struct iwl_rx_mem_buffer *rxb;
1058         unsigned long flags;
1059         int write;
1060
1061         spin_lock_irqsave(&rxq->lock, flags);
1062         write = rxq->write & ~0x7;
1063         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1064                 /* Get next free Rx buffer, remove from free list */
1065                 element = rxq->rx_free.next;
1066                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1067                 list_del(element);
1068
1069                 /* Point to Rx buffer via next RBD in circular buffer */
1070                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1071                 rxq->queue[rxq->write] = rxb;
1072                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1073                 rxq->free_count--;
1074         }
1075         spin_unlock_irqrestore(&rxq->lock, flags);
1076         /* If the pre-allocated buffer pool is dropping low, schedule to
1077          * refill it */
1078         if (rxq->free_count <= RX_LOW_WATERMARK)
1079                 queue_work(priv->workqueue, &priv->rx_replenish);
1080
1081
1082         /* If we've added more space for the firmware to place data, tell it.
1083          * Increment device's write pointer in multiples of 8. */
1084         if ((rxq->write_actual != (rxq->write & ~0x7))
1085             || (abs(rxq->write - rxq->read) > 7)) {
1086                 spin_lock_irqsave(&rxq->lock, flags);
1087                 rxq->need_update = 1;
1088                 spin_unlock_irqrestore(&rxq->lock, flags);
1089                 iwl_rx_queue_update_write_ptr(priv, rxq);
1090         }
1091 }
1092
1093 /**
1094  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1095  *
1096  * When moving to rx_free an SKB is allocated for the slot.
1097  *
1098  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1099  * This is called as a scheduled work item (except for during initialization)
1100  */
1101 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1102 {
1103         struct iwl_rx_queue *rxq = &priv->rxq;
1104         struct list_head *element;
1105         struct iwl_rx_mem_buffer *rxb;
1106         struct page *page;
1107         unsigned long flags;
1108         gfp_t gfp_mask = priority;
1109
1110         while (1) {
1111                 spin_lock_irqsave(&rxq->lock, flags);
1112
1113                 if (list_empty(&rxq->rx_used)) {
1114                         spin_unlock_irqrestore(&rxq->lock, flags);
1115                         return;
1116                 }
1117                 spin_unlock_irqrestore(&rxq->lock, flags);
1118
1119                 if (rxq->free_count > RX_LOW_WATERMARK)
1120                         gfp_mask |= __GFP_NOWARN;
1121
1122                 if (priv->hw_params.rx_page_order > 0)
1123                         gfp_mask |= __GFP_COMP;
1124
1125                 /* Alloc a new receive buffer */
1126                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1127                 if (!page) {
1128                         if (net_ratelimit())
1129                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1130                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1131                             net_ratelimit())
1132                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1133                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1134                                          rxq->free_count);
1135                         /* We don't reschedule replenish work here -- we will
1136                          * call the restock method and if it still needs
1137                          * more buffers it will schedule replenish */
1138                         break;
1139                 }
1140
1141                 spin_lock_irqsave(&rxq->lock, flags);
1142                 if (list_empty(&rxq->rx_used)) {
1143                         spin_unlock_irqrestore(&rxq->lock, flags);
1144                         __free_pages(page, priv->hw_params.rx_page_order);
1145                         return;
1146                 }
1147                 element = rxq->rx_used.next;
1148                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1149                 list_del(element);
1150                 spin_unlock_irqrestore(&rxq->lock, flags);
1151
1152                 rxb->page = page;
1153                 /* Get physical address of RB/SKB */
1154                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1155                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1156                                 PCI_DMA_FROMDEVICE);
1157
1158                 spin_lock_irqsave(&rxq->lock, flags);
1159
1160                 list_add_tail(&rxb->list, &rxq->rx_free);
1161                 rxq->free_count++;
1162                 priv->alloc_rxb_page++;
1163
1164                 spin_unlock_irqrestore(&rxq->lock, flags);
1165         }
1166 }
1167
1168 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1169 {
1170         unsigned long flags;
1171         int i;
1172         spin_lock_irqsave(&rxq->lock, flags);
1173         INIT_LIST_HEAD(&rxq->rx_free);
1174         INIT_LIST_HEAD(&rxq->rx_used);
1175         /* Fill the rx_used queue with _all_ of the Rx buffers */
1176         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1177                 /* In the reset function, these buffers may have been allocated
1178                  * to an SKB, so we need to unmap and free potential storage */
1179                 if (rxq->pool[i].page != NULL) {
1180                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1181                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1182                                 PCI_DMA_FROMDEVICE);
1183                         __iwl_free_pages(priv, rxq->pool[i].page);
1184                         rxq->pool[i].page = NULL;
1185                 }
1186                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1187         }
1188
1189         /* Set us so that we have processed and used all buffers, but have
1190          * not restocked the Rx queue with fresh buffers */
1191         rxq->read = rxq->write = 0;
1192         rxq->write_actual = 0;
1193         rxq->free_count = 0;
1194         spin_unlock_irqrestore(&rxq->lock, flags);
1195 }
1196
1197 void iwl3945_rx_replenish(void *data)
1198 {
1199         struct iwl_priv *priv = data;
1200         unsigned long flags;
1201
1202         iwl3945_rx_allocate(priv, GFP_KERNEL);
1203
1204         spin_lock_irqsave(&priv->lock, flags);
1205         iwl3945_rx_queue_restock(priv);
1206         spin_unlock_irqrestore(&priv->lock, flags);
1207 }
1208
1209 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1210 {
1211         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1212
1213         iwl3945_rx_queue_restock(priv);
1214 }
1215
1216
1217 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1218  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1219  * This free routine walks the list of POOL entries and if SKB is set to
1220  * non NULL it is unmapped and freed
1221  */
1222 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1223 {
1224         int i;
1225         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1226                 if (rxq->pool[i].page != NULL) {
1227                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1228                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1229                                 PCI_DMA_FROMDEVICE);
1230                         __iwl_free_pages(priv, rxq->pool[i].page);
1231                         rxq->pool[i].page = NULL;
1232                 }
1233         }
1234
1235         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1236                           rxq->dma_addr);
1237         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1238                           rxq->rb_stts, rxq->rb_stts_dma);
1239         rxq->bd = NULL;
1240         rxq->rb_stts  = NULL;
1241 }
1242
1243
1244 /* Convert linear signal-to-noise ratio into dB */
1245 static u8 ratio2dB[100] = {
1246 /*       0   1   2   3   4   5   6   7   8   9 */
1247          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1248         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1249         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1250         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1251         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1252         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1253         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1254         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1255         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1256         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1257 };
1258
1259 /* Calculates a relative dB value from a ratio of linear
1260  *   (i.e. not dB) signal levels.
1261  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1262 int iwl3945_calc_db_from_ratio(int sig_ratio)
1263 {
1264         /* 1000:1 or higher just report as 60 dB */
1265         if (sig_ratio >= 1000)
1266                 return 60;
1267
1268         /* 100:1 or higher, divide by 10 and use table,
1269          *   add 20 dB to make up for divide by 10 */
1270         if (sig_ratio >= 100)
1271                 return 20 + (int)ratio2dB[sig_ratio/10];
1272
1273         /* We shouldn't see this */
1274         if (sig_ratio < 1)
1275                 return 0;
1276
1277         /* Use table for ratios 1:1 - 99:1 */
1278         return (int)ratio2dB[sig_ratio];
1279 }
1280
1281 /**
1282  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1283  *
1284  * Uses the priv->rx_handlers callback function array to invoke
1285  * the appropriate handlers, including command responses,
1286  * frame-received notifications, and other notifications.
1287  */
1288 static void iwl3945_rx_handle(struct iwl_priv *priv)
1289 {
1290         struct iwl_rx_mem_buffer *rxb;
1291         struct iwl_rx_packet *pkt;
1292         struct iwl_rx_queue *rxq = &priv->rxq;
1293         u32 r, i;
1294         int reclaim;
1295         unsigned long flags;
1296         u8 fill_rx = 0;
1297         u32 count = 8;
1298         int total_empty = 0;
1299
1300         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1301          * buffer that the driver may process (last buffer filled by ucode). */
1302         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1303         i = rxq->read;
1304
1305         /* calculate total frames need to be restock after handling RX */
1306         total_empty = r - rxq->write_actual;
1307         if (total_empty < 0)
1308                 total_empty += RX_QUEUE_SIZE;
1309
1310         if (total_empty > (RX_QUEUE_SIZE / 2))
1311                 fill_rx = 1;
1312         /* Rx interrupt, but nothing sent from uCode */
1313         if (i == r)
1314                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1315
1316         while (i != r) {
1317                 rxb = rxq->queue[i];
1318
1319                 /* If an RXB doesn't have a Rx queue slot associated with it,
1320                  * then a bug has been introduced in the queue refilling
1321                  * routines -- catch it here */
1322                 BUG_ON(rxb == NULL);
1323
1324                 rxq->queue[i] = NULL;
1325
1326                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1327                                PAGE_SIZE << priv->hw_params.rx_page_order,
1328                                PCI_DMA_FROMDEVICE);
1329                 pkt = rxb_addr(rxb);
1330
1331                 trace_iwlwifi_dev_rx(priv, pkt,
1332                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1333
1334                 /* Reclaim a command buffer only if this packet is a response
1335                  *   to a (driver-originated) command.
1336                  * If the packet (e.g. Rx frame) originated from uCode,
1337                  *   there is no command buffer to reclaim.
1338                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1339                  *   but apparently a few don't get set; catch them here. */
1340                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1341                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1342                         (pkt->hdr.cmd != REPLY_TX);
1343
1344                 /* Based on type of command response or notification,
1345                  *   handle those that need handling via function in
1346                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1347                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1348                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1349                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1350                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1351                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1352                 } else {
1353                         /* No handling needed */
1354                         IWL_DEBUG_RX(priv,
1355                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1356                                 r, i, get_cmd_string(pkt->hdr.cmd),
1357                                 pkt->hdr.cmd);
1358                 }
1359
1360                 /*
1361                  * XXX: After here, we should always check rxb->page
1362                  * against NULL before touching it or its virtual
1363                  * memory (pkt). Because some rx_handler might have
1364                  * already taken or freed the pages.
1365                  */
1366
1367                 if (reclaim) {
1368                         /* Invoke any callbacks, transfer the buffer to caller,
1369                          * and fire off the (possibly) blocking iwl_send_cmd()
1370                          * as we reclaim the driver command queue */
1371                         if (rxb->page)
1372                                 iwl_tx_cmd_complete(priv, rxb);
1373                         else
1374                                 IWL_WARN(priv, "Claim null rxb?\n");
1375                 }
1376
1377                 /* Reuse the page if possible. For notification packets and
1378                  * SKBs that fail to Rx correctly, add them back into the
1379                  * rx_free list for reuse later. */
1380                 spin_lock_irqsave(&rxq->lock, flags);
1381                 if (rxb->page != NULL) {
1382                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1383                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1384                                 PCI_DMA_FROMDEVICE);
1385                         list_add_tail(&rxb->list, &rxq->rx_free);
1386                         rxq->free_count++;
1387                 } else
1388                         list_add_tail(&rxb->list, &rxq->rx_used);
1389
1390                 spin_unlock_irqrestore(&rxq->lock, flags);
1391
1392                 i = (i + 1) & RX_QUEUE_MASK;
1393                 /* If there are a lot of unused frames,
1394                  * restock the Rx queue so ucode won't assert. */
1395                 if (fill_rx) {
1396                         count++;
1397                         if (count >= 8) {
1398                                 rxq->read = i;
1399                                 iwl3945_rx_replenish_now(priv);
1400                                 count = 0;
1401                         }
1402                 }
1403         }
1404
1405         /* Backtrack one entry */
1406         rxq->read = i;
1407         if (fill_rx)
1408                 iwl3945_rx_replenish_now(priv);
1409         else
1410                 iwl3945_rx_queue_restock(priv);
1411 }
1412
1413 /* call this function to flush any scheduled tasklet */
1414 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1415 {
1416         /* wait to make sure we flush pending tasklet*/
1417         synchronize_irq(priv->pci_dev->irq);
1418         tasklet_kill(&priv->irq_tasklet);
1419 }
1420
1421 static const char *desc_lookup(int i)
1422 {
1423         switch (i) {
1424         case 1:
1425                 return "FAIL";
1426         case 2:
1427                 return "BAD_PARAM";
1428         case 3:
1429                 return "BAD_CHECKSUM";
1430         case 4:
1431                 return "NMI_INTERRUPT";
1432         case 5:
1433                 return "SYSASSERT";
1434         case 6:
1435                 return "FATAL_ERROR";
1436         }
1437
1438         return "UNKNOWN";
1439 }
1440
1441 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1442 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1443
1444 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1445 {
1446         u32 i;
1447         u32 desc, time, count, base, data1;
1448         u32 blink1, blink2, ilink1, ilink2;
1449
1450         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1451
1452         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1453                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1454                 return;
1455         }
1456
1457
1458         count = iwl_read_targ_mem(priv, base);
1459
1460         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1461                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1462                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1463                         priv->status, count);
1464         }
1465
1466         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1467                   "ilink1  nmiPC   Line\n");
1468         for (i = ERROR_START_OFFSET;
1469              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1470              i += ERROR_ELEM_SIZE) {
1471                 desc = iwl_read_targ_mem(priv, base + i);
1472                 time =
1473                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1474                 blink1 =
1475                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1476                 blink2 =
1477                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1478                 ilink1 =
1479                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1480                 ilink2 =
1481                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1482                 data1 =
1483                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1484
1485                 IWL_ERR(priv,
1486                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1487                         desc_lookup(desc), desc, time, blink1, blink2,
1488                         ilink1, ilink2, data1);
1489                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1490                                         0, blink1, blink2, ilink1, ilink2);
1491         }
1492 }
1493
1494 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1495
1496 /**
1497  * iwl3945_print_event_log - Dump error event log to syslog
1498  *
1499  */
1500 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1501                                   u32 num_events, u32 mode,
1502                                   int pos, char **buf, size_t bufsz)
1503 {
1504         u32 i;
1505         u32 base;       /* SRAM byte address of event log header */
1506         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1507         u32 ptr;        /* SRAM byte address of log data */
1508         u32 ev, time, data; /* event log data */
1509         unsigned long reg_flags;
1510
1511         if (num_events == 0)
1512                 return pos;
1513
1514         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1515
1516         if (mode == 0)
1517                 event_size = 2 * sizeof(u32);
1518         else
1519                 event_size = 3 * sizeof(u32);
1520
1521         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1522
1523         /* Make sure device is powered up for SRAM reads */
1524         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1525         iwl_grab_nic_access(priv);
1526
1527         /* Set starting address; reads will auto-increment */
1528         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1529         rmb();
1530
1531         /* "time" is actually "data" for mode 0 (no timestamp).
1532          * place event id # at far right for easier visual parsing. */
1533         for (i = 0; i < num_events; i++) {
1534                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1535                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1536                 if (mode == 0) {
1537                         /* data, ev */
1538                         if (bufsz) {
1539                                 pos += scnprintf(*buf + pos, bufsz - pos,
1540                                                 "0x%08x:%04u\n",
1541                                                 time, ev);
1542                         } else {
1543                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1544                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1545                                                               time, ev);
1546                         }
1547                 } else {
1548                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1549                         if (bufsz) {
1550                                 pos += scnprintf(*buf + pos, bufsz - pos,
1551                                                 "%010u:0x%08x:%04u\n",
1552                                                  time, data, ev);
1553                         } else {
1554                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1555                                         time, data, ev);
1556                                 trace_iwlwifi_dev_ucode_event(priv, time,
1557                                                               data, ev);
1558                         }
1559                 }
1560         }
1561
1562         /* Allow device to power down */
1563         iwl_release_nic_access(priv);
1564         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1565         return pos;
1566 }
1567
1568 /**
1569  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1570  */
1571 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1572                                       u32 num_wraps, u32 next_entry,
1573                                       u32 size, u32 mode,
1574                                       int pos, char **buf, size_t bufsz)
1575 {
1576         /*
1577          * display the newest DEFAULT_LOG_ENTRIES entries
1578          * i.e the entries just before the next ont that uCode would fill.
1579          */
1580         if (num_wraps) {
1581                 if (next_entry < size) {
1582                         pos = iwl3945_print_event_log(priv,
1583                                              capacity - (size - next_entry),
1584                                              size - next_entry, mode,
1585                                              pos, buf, bufsz);
1586                         pos = iwl3945_print_event_log(priv, 0,
1587                                                       next_entry, mode,
1588                                                       pos, buf, bufsz);
1589                 } else
1590                         pos = iwl3945_print_event_log(priv, next_entry - size,
1591                                                       size, mode,
1592                                                       pos, buf, bufsz);
1593         } else {
1594                 if (next_entry < size)
1595                         pos = iwl3945_print_event_log(priv, 0,
1596                                                       next_entry, mode,
1597                                                       pos, buf, bufsz);
1598                 else
1599                         pos = iwl3945_print_event_log(priv, next_entry - size,
1600                                                       size, mode,
1601                                                       pos, buf, bufsz);
1602         }
1603         return pos;
1604 }
1605
1606 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1607
1608 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1609                             char **buf, bool display)
1610 {
1611         u32 base;       /* SRAM byte address of event log header */
1612         u32 capacity;   /* event log capacity in # entries */
1613         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1614         u32 num_wraps;  /* # times uCode wrapped to top of log */
1615         u32 next_entry; /* index of next entry to be written by uCode */
1616         u32 size;       /* # entries that we'll print */
1617         int pos = 0;
1618         size_t bufsz = 0;
1619
1620         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1621         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1622                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1623                 return  -EINVAL;
1624         }
1625
1626         /* event log header */
1627         capacity = iwl_read_targ_mem(priv, base);
1628         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1629         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1630         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1631
1632         if (capacity > priv->cfg->max_event_log_size) {
1633                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1634                         capacity, priv->cfg->max_event_log_size);
1635                 capacity = priv->cfg->max_event_log_size;
1636         }
1637
1638         if (next_entry > priv->cfg->max_event_log_size) {
1639                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1640                         next_entry, priv->cfg->max_event_log_size);
1641                 next_entry = priv->cfg->max_event_log_size;
1642         }
1643
1644         size = num_wraps ? capacity : next_entry;
1645
1646         /* bail out if nothing in log */
1647         if (size == 0) {
1648                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1649                 return pos;
1650         }
1651
1652 #ifdef CONFIG_IWLWIFI_DEBUG
1653         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1654                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1655                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1656 #else
1657         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1658                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1659 #endif
1660
1661         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1662                   size);
1663
1664 #ifdef CONFIG_IWLWIFI_DEBUG
1665         if (display) {
1666                 if (full_log)
1667                         bufsz = capacity * 48;
1668                 else
1669                         bufsz = size * 48;
1670                 *buf = kmalloc(bufsz, GFP_KERNEL);
1671                 if (!*buf)
1672                         return -ENOMEM;
1673         }
1674         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1675                 /* if uCode has wrapped back to top of log,
1676                  * start at the oldest entry,
1677                  * i.e the next one that uCode would fill.
1678                  */
1679                 if (num_wraps)
1680                         pos = iwl3945_print_event_log(priv, next_entry,
1681                                                 capacity - next_entry, mode,
1682                                                 pos, buf, bufsz);
1683
1684                 /* (then/else) start at top of log */
1685                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1686                                               pos, buf, bufsz);
1687         } else
1688                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1689                                                     next_entry, size, mode,
1690                                                     pos, buf, bufsz);
1691 #else
1692         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1693                                             next_entry, size, mode,
1694                                             pos, buf, bufsz);
1695 #endif
1696         return pos;
1697 }
1698
1699 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1700 {
1701         u32 inta, handled = 0;
1702         u32 inta_fh;
1703         unsigned long flags;
1704 #ifdef CONFIG_IWLWIFI_DEBUG
1705         u32 inta_mask;
1706 #endif
1707
1708         spin_lock_irqsave(&priv->lock, flags);
1709
1710         /* Ack/clear/reset pending uCode interrupts.
1711          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1712          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1713         inta = iwl_read32(priv, CSR_INT);
1714         iwl_write32(priv, CSR_INT, inta);
1715
1716         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1717          * Any new interrupts that happen after this, either while we're
1718          * in this tasklet, or later, will show up in next ISR/tasklet. */
1719         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1720         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1721
1722 #ifdef CONFIG_IWLWIFI_DEBUG
1723         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1724                 /* just for debug */
1725                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1726                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1727                               inta, inta_mask, inta_fh);
1728         }
1729 #endif
1730
1731         spin_unlock_irqrestore(&priv->lock, flags);
1732
1733         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1734          * atomic, make sure that inta covers all the interrupts that
1735          * we've discovered, even if FH interrupt came in just after
1736          * reading CSR_INT. */
1737         if (inta_fh & CSR39_FH_INT_RX_MASK)
1738                 inta |= CSR_INT_BIT_FH_RX;
1739         if (inta_fh & CSR39_FH_INT_TX_MASK)
1740                 inta |= CSR_INT_BIT_FH_TX;
1741
1742         /* Now service all interrupt bits discovered above. */
1743         if (inta & CSR_INT_BIT_HW_ERR) {
1744                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1745
1746                 /* Tell the device to stop sending interrupts */
1747                 iwl_disable_interrupts(priv);
1748
1749                 priv->isr_stats.hw++;
1750                 iwl_irq_handle_error(priv);
1751
1752                 handled |= CSR_INT_BIT_HW_ERR;
1753
1754                 return;
1755         }
1756
1757 #ifdef CONFIG_IWLWIFI_DEBUG
1758         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1759                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1760                 if (inta & CSR_INT_BIT_SCD) {
1761                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1762                                       "the frame/frames.\n");
1763                         priv->isr_stats.sch++;
1764                 }
1765
1766                 /* Alive notification via Rx interrupt will do the real work */
1767                 if (inta & CSR_INT_BIT_ALIVE) {
1768                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1769                         priv->isr_stats.alive++;
1770                 }
1771         }
1772 #endif
1773         /* Safely ignore these bits for debug checks below */
1774         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1775
1776         /* Error detected by uCode */
1777         if (inta & CSR_INT_BIT_SW_ERR) {
1778                 IWL_ERR(priv, "Microcode SW error detected. "
1779                         "Restarting 0x%X.\n", inta);
1780                 priv->isr_stats.sw++;
1781                 priv->isr_stats.sw_err = inta;
1782                 iwl_irq_handle_error(priv);
1783                 handled |= CSR_INT_BIT_SW_ERR;
1784         }
1785
1786         /* uCode wakes up after power-down sleep */
1787         if (inta & CSR_INT_BIT_WAKEUP) {
1788                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1789                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1790                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1791                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1792                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1793                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1794                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1795                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1796
1797                 priv->isr_stats.wakeup++;
1798                 handled |= CSR_INT_BIT_WAKEUP;
1799         }
1800
1801         /* All uCode command responses, including Tx command responses,
1802          * Rx "responses" (frame-received notification), and other
1803          * notifications from uCode come through here*/
1804         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1805                 iwl3945_rx_handle(priv);
1806                 priv->isr_stats.rx++;
1807                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1808         }
1809
1810         if (inta & CSR_INT_BIT_FH_TX) {
1811                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1812                 priv->isr_stats.tx++;
1813
1814                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1815                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1816                                         (FH39_SRVC_CHNL), 0x0);
1817                 handled |= CSR_INT_BIT_FH_TX;
1818         }
1819
1820         if (inta & ~handled) {
1821                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1822                 priv->isr_stats.unhandled++;
1823         }
1824
1825         if (inta & ~priv->inta_mask) {
1826                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1827                          inta & ~priv->inta_mask);
1828                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1829         }
1830
1831         /* Re-enable all interrupts */
1832         /* only Re-enable if disabled by irq */
1833         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1834                 iwl_enable_interrupts(priv);
1835
1836 #ifdef CONFIG_IWLWIFI_DEBUG
1837         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1838                 inta = iwl_read32(priv, CSR_INT);
1839                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1840                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1841                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1842                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1843         }
1844 #endif
1845 }
1846
1847 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1848                                                struct ieee80211_vif *vif,
1849                                                enum ieee80211_band band,
1850                                                struct iwl3945_scan_channel *scan_ch)
1851 {
1852         const struct ieee80211_supported_band *sband;
1853         u16 passive_dwell = 0;
1854         u16 active_dwell = 0;
1855         int added = 0;
1856         u8 channel = 0;
1857
1858         sband = iwl_get_hw_mode(priv, band);
1859         if (!sband) {
1860                 IWL_ERR(priv, "invalid band\n");
1861                 return added;
1862         }
1863
1864         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1865         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1866
1867         if (passive_dwell <= active_dwell)
1868                 passive_dwell = active_dwell + 1;
1869
1870
1871         channel = iwl_get_single_channel_number(priv, band);
1872
1873         if (channel) {
1874                 scan_ch->channel = channel;
1875                 scan_ch->type = 0;      /* passive */
1876                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1877                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1878                 /* Set txpower levels to defaults */
1879                 scan_ch->tpc.dsp_atten = 110;
1880                 if (band == IEEE80211_BAND_5GHZ)
1881                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1882                 else
1883                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1884                 added++;
1885         } else
1886                 IWL_ERR(priv, "no valid channel found\n");
1887         return added;
1888 }
1889
1890 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1891                                          enum ieee80211_band band,
1892                                      u8 is_active, u8 n_probes,
1893                                      struct iwl3945_scan_channel *scan_ch,
1894                                      struct ieee80211_vif *vif)
1895 {
1896         struct ieee80211_channel *chan;
1897         const struct ieee80211_supported_band *sband;
1898         const struct iwl_channel_info *ch_info;
1899         u16 passive_dwell = 0;
1900         u16 active_dwell = 0;
1901         int added, i;
1902
1903         sband = iwl_get_hw_mode(priv, band);
1904         if (!sband)
1905                 return 0;
1906
1907         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1908         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1909
1910         if (passive_dwell <= active_dwell)
1911                 passive_dwell = active_dwell + 1;
1912
1913         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1914                 chan = priv->scan_request->channels[i];
1915
1916                 if (chan->band != band)
1917                         continue;
1918
1919                 scan_ch->channel = chan->hw_value;
1920
1921                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1922                 if (!is_channel_valid(ch_info)) {
1923                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1924                                        scan_ch->channel);
1925                         continue;
1926                 }
1927
1928                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1929                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1930                 /* If passive , set up for auto-switch
1931                  *  and use long active_dwell time.
1932                  */
1933                 if (!is_active || is_channel_passive(ch_info) ||
1934                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1935                         scan_ch->type = 0;      /* passive */
1936                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1937                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1938                 } else {
1939                         scan_ch->type = 1;      /* active */
1940                 }
1941
1942                 /* Set direct probe bits. These may be used both for active
1943                  * scan channels (probes gets sent right away),
1944                  * or for passive channels (probes get se sent only after
1945                  * hearing clear Rx packet).*/
1946                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1947                         if (n_probes)
1948                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1949                 } else {
1950                         /* uCode v1 does not allow setting direct probe bits on
1951                          * passive channel. */
1952                         if ((scan_ch->type & 1) && n_probes)
1953                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1954                 }
1955
1956                 /* Set txpower levels to defaults */
1957                 scan_ch->tpc.dsp_atten = 110;
1958                 /* scan_pwr_info->tpc.dsp_atten; */
1959
1960                 /*scan_pwr_info->tpc.tx_gain; */
1961                 if (band == IEEE80211_BAND_5GHZ)
1962                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1963                 else {
1964                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1965                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1966                          * power level:
1967                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1968                          */
1969                 }
1970
1971                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1972                                scan_ch->channel,
1973                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1974                                (scan_ch->type & 1) ?
1975                                active_dwell : passive_dwell);
1976
1977                 scan_ch++;
1978                 added++;
1979         }
1980
1981         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1982         return added;
1983 }
1984
1985 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1986                               struct ieee80211_rate *rates)
1987 {
1988         int i;
1989
1990         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1991                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1992                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1993                 rates[i].hw_value_short = i;
1994                 rates[i].flags = 0;
1995                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1996                         /*
1997                          * If CCK != 1M then set short preamble rate flag.
1998                          */
1999                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2000                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2001                 }
2002         }
2003 }
2004
2005 /******************************************************************************
2006  *
2007  * uCode download functions
2008  *
2009  ******************************************************************************/
2010
2011 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2012 {
2013         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2014         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2015         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2016         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2017         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2018         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2019 }
2020
2021 /**
2022  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2023  *     looking at all data.
2024  */
2025 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2026 {
2027         u32 val;
2028         u32 save_len = len;
2029         int rc = 0;
2030         u32 errcnt;
2031
2032         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2033
2034         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2035                                IWL39_RTC_INST_LOWER_BOUND);
2036
2037         errcnt = 0;
2038         for (; len > 0; len -= sizeof(u32), image++) {
2039                 /* read data comes through single port, auto-incr addr */
2040                 /* NOTE: Use the debugless read so we don't flood kernel log
2041                  * if IWL_DL_IO is set */
2042                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2043                 if (val != le32_to_cpu(*image)) {
2044                         IWL_ERR(priv, "uCode INST section is invalid at "
2045                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2046                                   save_len - len, val, le32_to_cpu(*image));
2047                         rc = -EIO;
2048                         errcnt++;
2049                         if (errcnt >= 20)
2050                                 break;
2051                 }
2052         }
2053
2054
2055         if (!errcnt)
2056                 IWL_DEBUG_INFO(priv,
2057                         "ucode image in INSTRUCTION memory is good\n");
2058
2059         return rc;
2060 }
2061
2062
2063 /**
2064  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2065  *   using sample data 100 bytes apart.  If these sample points are good,
2066  *   it's a pretty good bet that everything between them is good, too.
2067  */
2068 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2069 {
2070         u32 val;
2071         int rc = 0;
2072         u32 errcnt = 0;
2073         u32 i;
2074
2075         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2076
2077         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2078                 /* read data comes through single port, auto-incr addr */
2079                 /* NOTE: Use the debugless read so we don't flood kernel log
2080                  * if IWL_DL_IO is set */
2081                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2082                         i + IWL39_RTC_INST_LOWER_BOUND);
2083                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2084                 if (val != le32_to_cpu(*image)) {
2085 #if 0 /* Enable this if you want to see details */
2086                         IWL_ERR(priv, "uCode INST section is invalid at "
2087                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2088                                   i, val, *image);
2089 #endif
2090                         rc = -EIO;
2091                         errcnt++;
2092                         if (errcnt >= 3)
2093                                 break;
2094                 }
2095         }
2096
2097         return rc;
2098 }
2099
2100
2101 /**
2102  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2103  *    and verify its contents
2104  */
2105 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2106 {
2107         __le32 *image;
2108         u32 len;
2109         int rc = 0;
2110
2111         /* Try bootstrap */
2112         image = (__le32 *)priv->ucode_boot.v_addr;
2113         len = priv->ucode_boot.len;
2114         rc = iwl3945_verify_inst_sparse(priv, image, len);
2115         if (rc == 0) {
2116                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2117                 return 0;
2118         }
2119
2120         /* Try initialize */
2121         image = (__le32 *)priv->ucode_init.v_addr;
2122         len = priv->ucode_init.len;
2123         rc = iwl3945_verify_inst_sparse(priv, image, len);
2124         if (rc == 0) {
2125                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2126                 return 0;
2127         }
2128
2129         /* Try runtime/protocol */
2130         image = (__le32 *)priv->ucode_code.v_addr;
2131         len = priv->ucode_code.len;
2132         rc = iwl3945_verify_inst_sparse(priv, image, len);
2133         if (rc == 0) {
2134                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2135                 return 0;
2136         }
2137
2138         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2139
2140         /* Since nothing seems to match, show first several data entries in
2141          * instruction SRAM, so maybe visual inspection will give a clue.
2142          * Selection of bootstrap image (vs. other images) is arbitrary. */
2143         image = (__le32 *)priv->ucode_boot.v_addr;
2144         len = priv->ucode_boot.len;
2145         rc = iwl3945_verify_inst_full(priv, image, len);
2146
2147         return rc;
2148 }
2149
2150 static void iwl3945_nic_start(struct iwl_priv *priv)
2151 {
2152         /* Remove all resets to allow NIC to operate */
2153         iwl_write32(priv, CSR_RESET, 0);
2154 }
2155
2156 #define IWL3945_UCODE_GET(item)                                         \
2157 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2158 {                                                                       \
2159         return le32_to_cpu(ucode->u.v1.item);                           \
2160 }
2161
2162 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2163 {
2164         return 24;
2165 }
2166
2167 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2168 {
2169         return (u8 *) ucode->u.v1.data;
2170 }
2171
2172 IWL3945_UCODE_GET(inst_size);
2173 IWL3945_UCODE_GET(data_size);
2174 IWL3945_UCODE_GET(init_size);
2175 IWL3945_UCODE_GET(init_data_size);
2176 IWL3945_UCODE_GET(boot_size);
2177
2178 /**
2179  * iwl3945_read_ucode - Read uCode images from disk file.
2180  *
2181  * Copy into buffers for card to fetch via bus-mastering
2182  */
2183 static int iwl3945_read_ucode(struct iwl_priv *priv)
2184 {
2185         const struct iwl_ucode_header *ucode;
2186         int ret = -EINVAL, index;
2187         const struct firmware *ucode_raw;
2188         /* firmware file name contains uCode/driver compatibility version */
2189         const char *name_pre = priv->cfg->fw_name_pre;
2190         const unsigned int api_max = priv->cfg->ucode_api_max;
2191         const unsigned int api_min = priv->cfg->ucode_api_min;
2192         char buf[25];
2193         u8 *src;
2194         size_t len;
2195         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2196
2197         /* Ask kernel firmware_class module to get the boot firmware off disk.
2198          * request_firmware() is synchronous, file is in memory on return. */
2199         for (index = api_max; index >= api_min; index--) {
2200                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2201                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2202                 if (ret < 0) {
2203                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2204                                   buf, ret);
2205                         if (ret == -ENOENT)
2206                                 continue;
2207                         else
2208                                 goto error;
2209                 } else {
2210                         if (index < api_max)
2211                                 IWL_ERR(priv, "Loaded firmware %s, "
2212                                         "which is deprecated. "
2213                                         " Please use API v%u instead.\n",
2214                                           buf, api_max);
2215                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2216                                        "(%zd bytes) from disk\n",
2217                                        buf, ucode_raw->size);
2218                         break;
2219                 }
2220         }
2221
2222         if (ret < 0)
2223                 goto error;
2224
2225         /* Make sure that we got at least our header! */
2226         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2227                 IWL_ERR(priv, "File size way too small!\n");
2228                 ret = -EINVAL;
2229                 goto err_release;
2230         }
2231
2232         /* Data from ucode file:  header followed by uCode images */
2233         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2234
2235         priv->ucode_ver = le32_to_cpu(ucode->ver);
2236         api_ver = IWL_UCODE_API(priv->ucode_ver);
2237         inst_size = iwl3945_ucode_get_inst_size(ucode);
2238         data_size = iwl3945_ucode_get_data_size(ucode);
2239         init_size = iwl3945_ucode_get_init_size(ucode);
2240         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2241         boot_size = iwl3945_ucode_get_boot_size(ucode);
2242         src = iwl3945_ucode_get_data(ucode);
2243
2244         /* api_ver should match the api version forming part of the
2245          * firmware filename ... but we don't check for that and only rely
2246          * on the API version read from firmware header from here on forward */
2247
2248         if (api_ver < api_min || api_ver > api_max) {
2249                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2250                           "Driver supports v%u, firmware is v%u.\n",
2251                           api_max, api_ver);
2252                 priv->ucode_ver = 0;
2253                 ret = -EINVAL;
2254                 goto err_release;
2255         }
2256         if (api_ver != api_max)
2257                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2258                           "got %u. New firmware can be obtained "
2259                           "from http://www.intellinuxwireless.org.\n",
2260                           api_max, api_ver);
2261
2262         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2263                 IWL_UCODE_MAJOR(priv->ucode_ver),
2264                 IWL_UCODE_MINOR(priv->ucode_ver),
2265                 IWL_UCODE_API(priv->ucode_ver),
2266                 IWL_UCODE_SERIAL(priv->ucode_ver));
2267
2268         snprintf(priv->hw->wiphy->fw_version,
2269                  sizeof(priv->hw->wiphy->fw_version),
2270                  "%u.%u.%u.%u",
2271                  IWL_UCODE_MAJOR(priv->ucode_ver),
2272                  IWL_UCODE_MINOR(priv->ucode_ver),
2273                  IWL_UCODE_API(priv->ucode_ver),
2274                  IWL_UCODE_SERIAL(priv->ucode_ver));
2275
2276         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2277                        priv->ucode_ver);
2278         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2279                        inst_size);
2280         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2281                        data_size);
2282         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2283                        init_size);
2284         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2285                        init_data_size);
2286         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2287                        boot_size);
2288
2289
2290         /* Verify size of file vs. image size info in file's header */
2291         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2292                 inst_size + data_size + init_size +
2293                 init_data_size + boot_size) {
2294
2295                 IWL_DEBUG_INFO(priv,
2296                         "uCode file size %zd does not match expected size\n",
2297                         ucode_raw->size);
2298                 ret = -EINVAL;
2299                 goto err_release;
2300         }
2301
2302         /* Verify that uCode images will fit in card's SRAM */
2303         if (inst_size > IWL39_MAX_INST_SIZE) {
2304                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2305                                inst_size);
2306                 ret = -EINVAL;
2307                 goto err_release;
2308         }
2309
2310         if (data_size > IWL39_MAX_DATA_SIZE) {
2311                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2312                                data_size);
2313                 ret = -EINVAL;
2314                 goto err_release;
2315         }
2316         if (init_size > IWL39_MAX_INST_SIZE) {
2317                 IWL_DEBUG_INFO(priv,
2318                                 "uCode init instr len %d too large to fit in\n",
2319                                 init_size);
2320                 ret = -EINVAL;
2321                 goto err_release;
2322         }
2323         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2324                 IWL_DEBUG_INFO(priv,
2325                                 "uCode init data len %d too large to fit in\n",
2326                                 init_data_size);
2327                 ret = -EINVAL;
2328                 goto err_release;
2329         }
2330         if (boot_size > IWL39_MAX_BSM_SIZE) {
2331                 IWL_DEBUG_INFO(priv,
2332                                 "uCode boot instr len %d too large to fit in\n",
2333                                 boot_size);
2334                 ret = -EINVAL;
2335                 goto err_release;
2336         }
2337
2338         /* Allocate ucode buffers for card's bus-master loading ... */
2339
2340         /* Runtime instructions and 2 copies of data:
2341          * 1) unmodified from disk
2342          * 2) backup cache for save/restore during power-downs */
2343         priv->ucode_code.len = inst_size;
2344         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2345
2346         priv->ucode_data.len = data_size;
2347         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2348
2349         priv->ucode_data_backup.len = data_size;
2350         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2351
2352         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2353             !priv->ucode_data_backup.v_addr)
2354                 goto err_pci_alloc;
2355
2356         /* Initialization instructions and data */
2357         if (init_size && init_data_size) {
2358                 priv->ucode_init.len = init_size;
2359                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2360
2361                 priv->ucode_init_data.len = init_data_size;
2362                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2363
2364                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2365                         goto err_pci_alloc;
2366         }
2367
2368         /* Bootstrap (instructions only, no data) */
2369         if (boot_size) {
2370                 priv->ucode_boot.len = boot_size;
2371                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2372
2373                 if (!priv->ucode_boot.v_addr)
2374                         goto err_pci_alloc;
2375         }
2376
2377         /* Copy images into buffers for card's bus-master reads ... */
2378
2379         /* Runtime instructions (first block of data in file) */
2380         len = inst_size;
2381         IWL_DEBUG_INFO(priv,
2382                 "Copying (but not loading) uCode instr len %zd\n", len);
2383         memcpy(priv->ucode_code.v_addr, src, len);
2384         src += len;
2385
2386         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2387                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2388
2389         /* Runtime data (2nd block)
2390          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2391         len = data_size;
2392         IWL_DEBUG_INFO(priv,
2393                 "Copying (but not loading) uCode data len %zd\n", len);
2394         memcpy(priv->ucode_data.v_addr, src, len);
2395         memcpy(priv->ucode_data_backup.v_addr, src, len);
2396         src += len;
2397
2398         /* Initialization instructions (3rd block) */
2399         if (init_size) {
2400                 len = init_size;
2401                 IWL_DEBUG_INFO(priv,
2402                         "Copying (but not loading) init instr len %zd\n", len);
2403                 memcpy(priv->ucode_init.v_addr, src, len);
2404                 src += len;
2405         }
2406
2407         /* Initialization data (4th block) */
2408         if (init_data_size) {
2409                 len = init_data_size;
2410                 IWL_DEBUG_INFO(priv,
2411                         "Copying (but not loading) init data len %zd\n", len);
2412                 memcpy(priv->ucode_init_data.v_addr, src, len);
2413                 src += len;
2414         }
2415
2416         /* Bootstrap instructions (5th block) */
2417         len = boot_size;
2418         IWL_DEBUG_INFO(priv,
2419                 "Copying (but not loading) boot instr len %zd\n", len);
2420         memcpy(priv->ucode_boot.v_addr, src, len);
2421
2422         /* We have our copies now, allow OS release its copies */
2423         release_firmware(ucode_raw);
2424         return 0;
2425
2426  err_pci_alloc:
2427         IWL_ERR(priv, "failed to allocate pci memory\n");
2428         ret = -ENOMEM;
2429         iwl3945_dealloc_ucode_pci(priv);
2430
2431  err_release:
2432         release_firmware(ucode_raw);
2433
2434  error:
2435         return ret;
2436 }
2437
2438
2439 /**
2440  * iwl3945_set_ucode_ptrs - Set uCode address location
2441  *
2442  * Tell initialization uCode where to find runtime uCode.
2443  *
2444  * BSM registers initially contain pointers to initialization uCode.
2445  * We need to replace them to load runtime uCode inst and data,
2446  * and to save runtime data when powering down.
2447  */
2448 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2449 {
2450         dma_addr_t pinst;
2451         dma_addr_t pdata;
2452
2453         /* bits 31:0 for 3945 */
2454         pinst = priv->ucode_code.p_addr;
2455         pdata = priv->ucode_data_backup.p_addr;
2456
2457         /* Tell bootstrap uCode where to find image to load */
2458         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2459         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2460         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2461                                  priv->ucode_data.len);
2462
2463         /* Inst byte count must be last to set up, bit 31 signals uCode
2464          *   that all new ptr/size info is in place */
2465         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2466                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2467
2468         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2469
2470         return 0;
2471 }
2472
2473 /**
2474  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2475  *
2476  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2477  *
2478  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2479  */
2480 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2481 {
2482         /* Check alive response for "valid" sign from uCode */
2483         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2484                 /* We had an error bringing up the hardware, so take it
2485                  * all the way back down so we can try again */
2486                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2487                 goto restart;
2488         }
2489
2490         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2491          * This is a paranoid check, because we would not have gotten the
2492          * "initialize" alive if code weren't properly loaded.  */
2493         if (iwl3945_verify_ucode(priv)) {
2494                 /* Runtime instruction load was bad;
2495                  * take it all the way back down so we can try again */
2496                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2497                 goto restart;
2498         }
2499
2500         /* Send pointers to protocol/runtime uCode image ... init code will
2501          * load and launch runtime uCode, which will send us another "Alive"
2502          * notification. */
2503         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2504         if (iwl3945_set_ucode_ptrs(priv)) {
2505                 /* Runtime instruction load won't happen;
2506                  * take it all the way back down so we can try again */
2507                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2508                 goto restart;
2509         }
2510         return;
2511
2512  restart:
2513         queue_work(priv->workqueue, &priv->restart);
2514 }
2515
2516 /**
2517  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2518  *                   from protocol/runtime uCode (initialization uCode's
2519  *                   Alive gets handled by iwl3945_init_alive_start()).
2520  */
2521 static void iwl3945_alive_start(struct iwl_priv *priv)
2522 {
2523         int thermal_spin = 0;
2524         u32 rfkill;
2525
2526         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2527
2528         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2529                 /* We had an error bringing up the hardware, so take it
2530                  * all the way back down so we can try again */
2531                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2532                 goto restart;
2533         }
2534
2535         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2536          * This is a paranoid check, because we would not have gotten the
2537          * "runtime" alive if code weren't properly loaded.  */
2538         if (iwl3945_verify_ucode(priv)) {
2539                 /* Runtime instruction load was bad;
2540                  * take it all the way back down so we can try again */
2541                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2542                 goto restart;
2543         }
2544
2545         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2546         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2547
2548         if (rfkill & 0x1) {
2549                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2550                 /* if RFKILL is not on, then wait for thermal
2551                  * sensor in adapter to kick in */
2552                 while (iwl3945_hw_get_temperature(priv) == 0) {
2553                         thermal_spin++;
2554                         udelay(10);
2555                 }
2556
2557                 if (thermal_spin)
2558                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2559                                        thermal_spin * 10);
2560         } else
2561                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2562
2563         /* After the ALIVE response, we can send commands to 3945 uCode */
2564         set_bit(STATUS_ALIVE, &priv->status);
2565
2566         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2567                 /* Enable timer to monitor the driver queues */
2568                 mod_timer(&priv->monitor_recover,
2569                         jiffies +
2570                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2571         }
2572
2573         if (iwl_is_rfkill(priv))
2574                 return;
2575
2576         ieee80211_wake_queues(priv->hw);
2577
2578         priv->active_rate = IWL_RATES_MASK;
2579
2580         iwl_power_update_mode(priv, true);
2581
2582         if (iwl_is_associated(priv)) {
2583                 struct iwl3945_rxon_cmd *active_rxon =
2584                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2585
2586                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2587                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2588         } else {
2589                 /* Initialize our rx_config data */
2590                 iwl_connection_init_rx_config(priv, NULL);
2591         }
2592
2593         /* Configure Bluetooth device coexistence support */
2594         priv->cfg->ops->hcmd->send_bt_config(priv);
2595
2596         /* Configure the adapter for unassociated operation */
2597         iwlcore_commit_rxon(priv);
2598
2599         iwl3945_reg_txpower_periodic(priv);
2600
2601         iwl_leds_init(priv);
2602
2603         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2604         set_bit(STATUS_READY, &priv->status);
2605         wake_up_interruptible(&priv->wait_command_queue);
2606
2607         return;
2608
2609  restart:
2610         queue_work(priv->workqueue, &priv->restart);
2611 }
2612
2613 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2614
2615 static void __iwl3945_down(struct iwl_priv *priv)
2616 {
2617         unsigned long flags;
2618         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2619         struct ieee80211_conf *conf = NULL;
2620
2621         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2622
2623         conf = ieee80211_get_hw_conf(priv->hw);
2624
2625         if (!exit_pending)
2626                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2627
2628         /* Station information will now be cleared in device */
2629         iwl_clear_ucode_stations(priv);
2630         iwl_dealloc_bcast_station(priv);
2631         iwl_clear_driver_stations(priv);
2632
2633         /* Unblock any waiting calls */
2634         wake_up_interruptible_all(&priv->wait_command_queue);
2635
2636         /* Wipe out the EXIT_PENDING status bit if we are not actually
2637          * exiting the module */
2638         if (!exit_pending)
2639                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2640
2641         /* stop and reset the on-board processor */
2642         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2643
2644         /* tell the device to stop sending interrupts */
2645         spin_lock_irqsave(&priv->lock, flags);
2646         iwl_disable_interrupts(priv);
2647         spin_unlock_irqrestore(&priv->lock, flags);
2648         iwl_synchronize_irq(priv);
2649
2650         if (priv->mac80211_registered)
2651                 ieee80211_stop_queues(priv->hw);
2652
2653         /* If we have not previously called iwl3945_init() then
2654          * clear all bits but the RF Kill bits and return */
2655         if (!iwl_is_init(priv)) {
2656                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2657                                         STATUS_RF_KILL_HW |
2658                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2659                                         STATUS_GEO_CONFIGURED |
2660                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2661                                         STATUS_EXIT_PENDING;
2662                 goto exit;
2663         }
2664
2665         /* ...otherwise clear out all the status bits but the RF Kill
2666          * bit and continue taking the NIC down. */
2667         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2668                                 STATUS_RF_KILL_HW |
2669                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2670                                 STATUS_GEO_CONFIGURED |
2671                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2672                                 STATUS_FW_ERROR |
2673                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2674                                 STATUS_EXIT_PENDING;
2675
2676         iwl3945_hw_txq_ctx_stop(priv);
2677         iwl3945_hw_rxq_stop(priv);
2678
2679         /* Power-down device's busmaster DMA clocks */
2680         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2681         udelay(5);
2682
2683         /* Stop the device, and put it in low power state */
2684         priv->cfg->ops->lib->apm_ops.stop(priv);
2685
2686  exit:
2687         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2688
2689         if (priv->ibss_beacon)
2690                 dev_kfree_skb(priv->ibss_beacon);
2691         priv->ibss_beacon = NULL;
2692
2693         /* clear out any free frames */
2694         iwl3945_clear_free_frames(priv);
2695 }
2696
2697 static void iwl3945_down(struct iwl_priv *priv)
2698 {
2699         mutex_lock(&priv->mutex);
2700         __iwl3945_down(priv);
2701         mutex_unlock(&priv->mutex);
2702
2703         iwl3945_cancel_deferred_work(priv);
2704 }
2705
2706 #define MAX_HW_RESTARTS 5
2707
2708 static int __iwl3945_up(struct iwl_priv *priv)
2709 {
2710         int rc, i;
2711
2712         rc = iwl_alloc_bcast_station(priv, false);
2713         if (rc)
2714                 return rc;
2715
2716         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2717                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2718                 return -EIO;
2719         }
2720
2721         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2722                 IWL_ERR(priv, "ucode not available for device bring up\n");
2723                 return -EIO;
2724         }
2725
2726         /* If platform's RF_KILL switch is NOT set to KILL */
2727         if (iwl_read32(priv, CSR_GP_CNTRL) &
2728                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2729                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2730         else {
2731                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2732                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2733                 return -ENODEV;
2734         }
2735
2736         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2737
2738         rc = iwl3945_hw_nic_init(priv);
2739         if (rc) {
2740                 IWL_ERR(priv, "Unable to int nic\n");
2741                 return rc;
2742         }
2743
2744         /* make sure rfkill handshake bits are cleared */
2745         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2746         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2747                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2748
2749         /* clear (again), then enable host interrupts */
2750         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2751         iwl_enable_interrupts(priv);
2752
2753         /* really make sure rfkill handshake bits are cleared */
2754         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2755         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2756
2757         /* Copy original ucode data image from disk into backup cache.
2758          * This will be used to initialize the on-board processor's
2759          * data SRAM for a clean start when the runtime program first loads. */
2760         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2761                priv->ucode_data.len);
2762
2763         /* We return success when we resume from suspend and rf_kill is on. */
2764         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2765                 return 0;
2766
2767         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2768
2769                 /* load bootstrap state machine,
2770                  * load bootstrap program into processor's memory,
2771                  * prepare to load the "initialize" uCode */
2772                 rc = priv->cfg->ops->lib->load_ucode(priv);
2773
2774                 if (rc) {
2775                         IWL_ERR(priv,
2776                                 "Unable to set up bootstrap uCode: %d\n", rc);
2777                         continue;
2778                 }
2779
2780                 /* start card; "initialize" will load runtime ucode */
2781                 iwl3945_nic_start(priv);
2782
2783                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2784
2785                 return 0;
2786         }
2787
2788         set_bit(STATUS_EXIT_PENDING, &priv->status);
2789         __iwl3945_down(priv);
2790         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2791
2792         /* tried to restart and config the device for as long as our
2793          * patience could withstand */
2794         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2795         return -EIO;
2796 }
2797
2798
2799 /*****************************************************************************
2800  *
2801  * Workqueue callbacks
2802  *
2803  *****************************************************************************/
2804
2805 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2806 {
2807         struct iwl_priv *priv =
2808             container_of(data, struct iwl_priv, init_alive_start.work);
2809
2810         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2811                 return;
2812
2813         mutex_lock(&priv->mutex);
2814         iwl3945_init_alive_start(priv);
2815         mutex_unlock(&priv->mutex);
2816 }
2817
2818 static void iwl3945_bg_alive_start(struct work_struct *data)
2819 {
2820         struct iwl_priv *priv =
2821             container_of(data, struct iwl_priv, alive_start.work);
2822
2823         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2824                 return;
2825
2826         mutex_lock(&priv->mutex);
2827         iwl3945_alive_start(priv);
2828         mutex_unlock(&priv->mutex);
2829 }
2830
2831 /*
2832  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2833  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2834  * *is* readable even when device has been SW_RESET into low power mode
2835  * (e.g. during RF KILL).
2836  */
2837 static void iwl3945_rfkill_poll(struct work_struct *data)
2838 {
2839         struct iwl_priv *priv =
2840             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2841         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2842         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2843                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2844
2845         if (new_rfkill != old_rfkill) {
2846                 if (new_rfkill)
2847                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2848                 else
2849                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2850
2851                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2852
2853                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2854                                 new_rfkill ? "disable radio" : "enable radio");
2855         }
2856
2857         /* Keep this running, even if radio now enabled.  This will be
2858          * cancelled in mac_start() if system decides to start again */
2859         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2860                            round_jiffies_relative(2 * HZ));
2861
2862 }
2863
2864 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2865 {
2866         struct iwl_host_cmd cmd = {
2867                 .id = REPLY_SCAN_CMD,
2868                 .len = sizeof(struct iwl3945_scan_cmd),
2869                 .flags = CMD_SIZE_HUGE,
2870         };
2871         struct iwl3945_scan_cmd *scan;
2872         struct ieee80211_conf *conf = NULL;
2873         u8 n_probes = 0;
2874         enum ieee80211_band band;
2875         bool is_active = false;
2876
2877         conf = ieee80211_get_hw_conf(priv->hw);
2878
2879         cancel_delayed_work(&priv->scan_check);
2880
2881         if (!iwl_is_ready(priv)) {
2882                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2883                 goto done;
2884         }
2885
2886         /* Make sure the scan wasn't canceled before this queued work
2887          * was given the chance to run... */
2888         if (!test_bit(STATUS_SCANNING, &priv->status))
2889                 goto done;
2890
2891         /* This should never be called or scheduled if there is currently
2892          * a scan active in the hardware. */
2893         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2894                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2895                                 "Ignoring second request.\n");
2896                 goto done;
2897         }
2898
2899         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2900                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2901                 goto done;
2902         }
2903
2904         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2905                 IWL_DEBUG_HC(priv,
2906                         "Scan request while abort pending. Queuing.\n");
2907                 goto done;
2908         }
2909
2910         if (iwl_is_rfkill(priv)) {
2911                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2912                 goto done;
2913         }
2914
2915         if (!test_bit(STATUS_READY, &priv->status)) {
2916                 IWL_DEBUG_HC(priv,
2917                         "Scan request while uninitialized. Queuing.\n");
2918                 goto done;
2919         }
2920
2921         if (!priv->scan_cmd) {
2922                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2923                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2924                 if (!priv->scan_cmd) {
2925                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2926                         goto done;
2927                 }
2928         }
2929         scan = priv->scan_cmd;
2930         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2931
2932         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2933         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2934
2935         if (iwl_is_associated(priv)) {
2936                 u16 interval = 0;
2937                 u32 extra;
2938                 u32 suspend_time = 100;
2939                 u32 scan_suspend_time = 100;
2940                 unsigned long flags;
2941
2942                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2943
2944                 spin_lock_irqsave(&priv->lock, flags);
2945                 interval = vif ? vif->bss_conf.beacon_int : 0;
2946                 spin_unlock_irqrestore(&priv->lock, flags);
2947
2948                 scan->suspend_time = 0;
2949                 scan->max_out_time = cpu_to_le32(200 * 1024);
2950                 if (!interval)
2951                         interval = suspend_time;
2952                 /*
2953                  * suspend time format:
2954                  *  0-19: beacon interval in usec (time before exec.)
2955                  * 20-23: 0
2956                  * 24-31: number of beacons (suspend between channels)
2957                  */
2958
2959                 extra = (suspend_time / interval) << 24;
2960                 scan_suspend_time = 0xFF0FFFFF &
2961                     (extra | ((suspend_time % interval) * 1024));
2962
2963                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2964                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2965                                scan_suspend_time, interval);
2966         }
2967
2968         if (priv->is_internal_short_scan) {
2969                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2970         } else if (priv->scan_request->n_ssids) {
2971                 int i, p = 0;
2972                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2973                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2974                         /* always does wildcard anyway */
2975                         if (!priv->scan_request->ssids[i].ssid_len)
2976                                 continue;
2977                         scan->direct_scan[p].id = WLAN_EID_SSID;
2978                         scan->direct_scan[p].len =
2979                                 priv->scan_request->ssids[i].ssid_len;
2980                         memcpy(scan->direct_scan[p].ssid,
2981                                priv->scan_request->ssids[i].ssid,
2982                                priv->scan_request->ssids[i].ssid_len);
2983                         n_probes++;
2984                         p++;
2985                 }
2986                 is_active = true;
2987         } else
2988                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2989
2990         /* We don't build a direct scan probe request; the uCode will do
2991          * that based on the direct_mask added to each channel entry */
2992         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2993         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2994         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2995
2996         /* flags + rate selection */
2997
2998         switch (priv->scan_band) {
2999         case IEEE80211_BAND_2GHZ:
3000                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3001                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3002                 scan->good_CRC_th = 0;
3003                 band = IEEE80211_BAND_2GHZ;
3004                 break;
3005         case IEEE80211_BAND_5GHZ:
3006                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3007                 /*
3008                  * If active scaning is requested but a certain channel
3009                  * is marked passive, we can do active scanning if we
3010                  * detect transmissions.
3011                  */
3012                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
3013                                                 IWL_GOOD_CRC_TH_DISABLED;
3014                 band = IEEE80211_BAND_5GHZ;
3015                 break;
3016         default:
3017                 IWL_WARN(priv, "Invalid scan band\n");
3018                 goto done;
3019         }
3020
3021         if (!priv->is_internal_short_scan) {
3022                 scan->tx_cmd.len = cpu_to_le16(
3023                         iwl_fill_probe_req(priv,
3024                                 (struct ieee80211_mgmt *)scan->data,
3025                                 priv->scan_request->ie,
3026                                 priv->scan_request->ie_len,
3027                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3028         } else {
3029                 scan->tx_cmd.len = cpu_to_le16(
3030                         iwl_fill_probe_req(priv,
3031                                 (struct ieee80211_mgmt *)scan->data,
3032                                 NULL, 0,
3033                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3034         }
3035         /* select Rx antennas */
3036         scan->flags |= iwl3945_get_antenna_flags(priv);
3037
3038         if (priv->is_internal_short_scan) {
3039                 scan->channel_count =
3040                         iwl3945_get_single_channel_for_scan(priv, vif, band,
3041                                 (void *)&scan->data[le16_to_cpu(
3042                                 scan->tx_cmd.len)]);
3043         } else {
3044                 scan->channel_count =
3045                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3046                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
3047         }
3048
3049         if (scan->channel_count == 0) {
3050                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3051                 goto done;
3052         }
3053
3054         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3055             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3056         cmd.data = scan;
3057         scan->len = cpu_to_le16(cmd.len);
3058
3059         set_bit(STATUS_SCAN_HW, &priv->status);
3060         if (iwl_send_cmd_sync(priv, &cmd))
3061                 goto done;
3062
3063         queue_delayed_work(priv->workqueue, &priv->scan_check,
3064                            IWL_SCAN_CHECK_WATCHDOG);
3065
3066         return;
3067
3068  done:
3069         /* can not perform scan make sure we clear scanning
3070          * bits from status so next scan request can be performed.
3071          * if we dont clear scanning status bit here all next scan
3072          * will fail
3073         */
3074         clear_bit(STATUS_SCAN_HW, &priv->status);
3075         clear_bit(STATUS_SCANNING, &priv->status);
3076
3077         /* inform mac80211 scan aborted */
3078         queue_work(priv->workqueue, &priv->scan_completed);
3079 }
3080
3081 static void iwl3945_bg_restart(struct work_struct *data)
3082 {
3083         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3084
3085         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3086                 return;
3087
3088         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3089                 mutex_lock(&priv->mutex);
3090                 priv->vif = NULL;
3091                 priv->is_open = 0;
3092                 mutex_unlock(&priv->mutex);
3093                 iwl3945_down(priv);
3094                 ieee80211_restart_hw(priv->hw);
3095         } else {
3096                 iwl3945_down(priv);
3097
3098                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3099                         return;
3100
3101                 mutex_lock(&priv->mutex);
3102                 __iwl3945_up(priv);
3103                 mutex_unlock(&priv->mutex);
3104         }
3105 }
3106
3107 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3108 {
3109         struct iwl_priv *priv =
3110             container_of(data, struct iwl_priv, rx_replenish);
3111
3112         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3113                 return;
3114
3115         mutex_lock(&priv->mutex);
3116         iwl3945_rx_replenish(priv);
3117         mutex_unlock(&priv->mutex);
3118 }
3119
3120 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3121 {
3122         int rc = 0;
3123         struct ieee80211_conf *conf = NULL;
3124
3125         if (!vif || !priv->is_open)
3126                 return;
3127
3128         if (vif->type == NL80211_IFTYPE_AP) {
3129                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3130                 return;
3131         }
3132
3133         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3134                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3135
3136         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3137                 return;
3138
3139         iwl_scan_cancel_timeout(priv, 200);
3140
3141         conf = ieee80211_get_hw_conf(priv->hw);
3142
3143         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3144         iwlcore_commit_rxon(priv);
3145
3146         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3147         iwl_setup_rxon_timing(priv, vif);
3148         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3149                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3150         if (rc)
3151                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3152                             "Attempting to continue.\n");
3153
3154         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3155
3156         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3157
3158         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3159                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3160
3161         if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3162                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3163         else
3164                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3165
3166         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3167                 if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3168                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3169                 else
3170                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3171
3172                 if (vif->type == NL80211_IFTYPE_ADHOC)
3173                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3174         }
3175
3176         iwlcore_commit_rxon(priv);
3177
3178         switch (vif->type) {
3179         case NL80211_IFTYPE_STATION:
3180                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3181                 break;
3182         case NL80211_IFTYPE_ADHOC:
3183                 iwl3945_send_beacon_cmd(priv);
3184                 break;
3185         default:
3186                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3187                         __func__, vif->type);
3188                 break;
3189         }
3190 }
3191
3192 /*****************************************************************************
3193  *
3194  * mac80211 entry point functions
3195  *
3196  *****************************************************************************/
3197
3198 #define UCODE_READY_TIMEOUT     (2 * HZ)
3199
3200 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3201 {
3202         struct iwl_priv *priv = hw->priv;
3203         int ret;
3204
3205         IWL_DEBUG_MAC80211(priv, "enter\n");
3206
3207         /* we should be verifying the device is ready to be opened */
3208         mutex_lock(&priv->mutex);
3209
3210         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3211          * ucode filename and max sizes are card-specific. */
3212
3213         if (!priv->ucode_code.len) {
3214                 ret = iwl3945_read_ucode(priv);
3215                 if (ret) {
3216                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3217                         mutex_unlock(&priv->mutex);
3218                         goto out_release_irq;
3219                 }
3220         }
3221
3222         ret = __iwl3945_up(priv);
3223
3224         mutex_unlock(&priv->mutex);
3225
3226         if (ret)
3227                 goto out_release_irq;
3228
3229         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3230
3231         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3232          * mac80211 will not be run successfully. */
3233         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3234                         test_bit(STATUS_READY, &priv->status),
3235                         UCODE_READY_TIMEOUT);
3236         if (!ret) {
3237                 if (!test_bit(STATUS_READY, &priv->status)) {
3238                         IWL_ERR(priv,
3239                                 "Wait for START_ALIVE timeout after %dms.\n",
3240                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3241                         ret = -ETIMEDOUT;
3242                         goto out_release_irq;
3243                 }
3244         }
3245
3246         /* ucode is running and will send rfkill notifications,
3247          * no need to poll the killswitch state anymore */
3248         cancel_delayed_work(&priv->_3945.rfkill_poll);
3249
3250         iwl_led_start(priv);
3251
3252         priv->is_open = 1;
3253         IWL_DEBUG_MAC80211(priv, "leave\n");
3254         return 0;
3255
3256 out_release_irq:
3257         priv->is_open = 0;
3258         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3259         return ret;
3260 }
3261
3262 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3263 {
3264         struct iwl_priv *priv = hw->priv;
3265
3266         IWL_DEBUG_MAC80211(priv, "enter\n");
3267
3268         if (!priv->is_open) {
3269                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3270                 return;
3271         }
3272
3273         priv->is_open = 0;
3274
3275         if (iwl_is_ready_rf(priv)) {
3276                 /* stop mac, cancel any scan request and clear
3277                  * RXON_FILTER_ASSOC_MSK BIT
3278                  */
3279                 mutex_lock(&priv->mutex);
3280                 iwl_scan_cancel_timeout(priv, 100);
3281                 mutex_unlock(&priv->mutex);
3282         }
3283
3284         iwl3945_down(priv);
3285
3286         flush_workqueue(priv->workqueue);
3287
3288         /* start polling the killswitch state again */
3289         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3290                            round_jiffies_relative(2 * HZ));
3291
3292         IWL_DEBUG_MAC80211(priv, "leave\n");
3293 }
3294
3295 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3296 {
3297         struct iwl_priv *priv = hw->priv;
3298
3299         IWL_DEBUG_MAC80211(priv, "enter\n");
3300
3301         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3302                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3303
3304         if (iwl3945_tx_skb(priv, skb))
3305                 dev_kfree_skb_any(skb);
3306
3307         IWL_DEBUG_MAC80211(priv, "leave\n");
3308         return NETDEV_TX_OK;
3309 }
3310
3311 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3312 {
3313         int rc = 0;
3314
3315         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3316                 return;
3317
3318         /* The following should be done only at AP bring up */
3319         if (!(iwl_is_associated(priv))) {
3320
3321                 /* RXON - unassoc (to set timing command) */
3322                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3323                 iwlcore_commit_rxon(priv);
3324
3325                 /* RXON Timing */
3326                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3327                 iwl_setup_rxon_timing(priv, vif);
3328                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3329                                       sizeof(priv->rxon_timing),
3330                                       &priv->rxon_timing);
3331                 if (rc)
3332                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3333                                         "Attempting to continue.\n");
3334
3335                 priv->staging_rxon.assoc_id = 0;
3336
3337                 if (vif->bss_conf.assoc_capability &
3338                                         WLAN_CAPABILITY_SHORT_PREAMBLE)
3339                         priv->staging_rxon.flags |=
3340                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3341                 else
3342                         priv->staging_rxon.flags &=
3343                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3344
3345                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3346                         if (vif->bss_conf.assoc_capability &
3347                                         WLAN_CAPABILITY_SHORT_SLOT_TIME)
3348                                 priv->staging_rxon.flags |=
3349                                         RXON_FLG_SHORT_SLOT_MSK;
3350                         else
3351                                 priv->staging_rxon.flags &=
3352                                         ~RXON_FLG_SHORT_SLOT_MSK;
3353
3354                         if (vif->type == NL80211_IFTYPE_ADHOC)
3355                                 priv->staging_rxon.flags &=
3356                                         ~RXON_FLG_SHORT_SLOT_MSK;
3357                 }
3358                 /* restore RXON assoc */
3359                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3360                 iwlcore_commit_rxon(priv);
3361         }
3362         iwl3945_send_beacon_cmd(priv);
3363
3364         /* FIXME - we need to add code here to detect a totally new
3365          * configuration, reset the AP, unassoc, rxon timing, assoc,
3366          * clear sta table, add BCAST sta... */
3367 }
3368
3369 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3370                                struct ieee80211_vif *vif,
3371                                struct ieee80211_sta *sta,
3372                                struct ieee80211_key_conf *key)
3373 {
3374         struct iwl_priv *priv = hw->priv;
3375         int ret = 0;
3376         u8 sta_id = IWL_INVALID_STATION;
3377         u8 static_key;
3378
3379         IWL_DEBUG_MAC80211(priv, "enter\n");
3380
3381         if (iwl3945_mod_params.sw_crypto) {
3382                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3383                 return -EOPNOTSUPP;
3384         }
3385
3386         static_key = !iwl_is_associated(priv);
3387
3388         if (!static_key) {
3389                 if (!sta) {
3390                         sta_id = priv->hw_params.bcast_sta_id;
3391                 } else {
3392                         sta_id = iwl_sta_id(sta);
3393                         if (sta_id == IWL_INVALID_STATION) {
3394                                 IWL_DEBUG_MAC80211(priv,
3395                                                    "leave - %pM not in station map.\n",
3396                                                    sta->addr);
3397                                 return -EINVAL;
3398                         }
3399                 }
3400         }
3401
3402         mutex_lock(&priv->mutex);
3403         iwl_scan_cancel_timeout(priv, 100);
3404
3405         switch (cmd) {
3406         case SET_KEY:
3407                 if (static_key)
3408                         ret = iwl3945_set_static_key(priv, key);
3409                 else
3410                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3411                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3412                 break;
3413         case DISABLE_KEY:
3414                 if (static_key)
3415                         ret = iwl3945_remove_static_key(priv);
3416                 else
3417                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3418                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3419                 break;
3420         default:
3421                 ret = -EINVAL;
3422         }
3423
3424         mutex_unlock(&priv->mutex);
3425         IWL_DEBUG_MAC80211(priv, "leave\n");
3426
3427         return ret;
3428 }
3429
3430 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3431                                struct ieee80211_vif *vif,
3432                                struct ieee80211_sta *sta)
3433 {
3434         struct iwl_priv *priv = hw->priv;
3435         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3436         int ret;
3437         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3438         u8 sta_id;
3439
3440         sta_priv->common.sta_id = IWL_INVALID_STATION;
3441
3442         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3443                         sta->addr);
3444
3445         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3446                                      &sta_id);
3447         if (ret) {
3448                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3449                         sta->addr, ret);
3450                 /* Should we return success if return code is EEXIST ? */
3451                 return ret;
3452         }
3453
3454         sta_priv->common.sta_id = sta_id;
3455
3456         /* Initialize rate scaling */
3457         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3458                        sta->addr);
3459         iwl3945_rs_rate_init(priv, sta, sta_id);
3460
3461         return 0;
3462 }
3463 /*****************************************************************************
3464  *
3465  * sysfs attributes
3466  *
3467  *****************************************************************************/
3468
3469 #ifdef CONFIG_IWLWIFI_DEBUG
3470
3471 /*
3472  * The following adds a new attribute to the sysfs representation
3473  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3474  * used for controlling the debug level.
3475  *
3476  * See the level definitions in iwl for details.
3477  *
3478  * The debug_level being managed using sysfs below is a per device debug
3479  * level that is used instead of the global debug level if it (the per
3480  * device debug level) is set.
3481  */
3482 static ssize_t show_debug_level(struct device *d,
3483                                 struct device_attribute *attr, char *buf)
3484 {
3485         struct iwl_priv *priv = dev_get_drvdata(d);
3486         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3487 }
3488 static ssize_t store_debug_level(struct device *d,
3489                                 struct device_attribute *attr,
3490                                  const char *buf, size_t count)
3491 {
3492         struct iwl_priv *priv = dev_get_drvdata(d);
3493         unsigned long val;
3494         int ret;
3495
3496         ret = strict_strtoul(buf, 0, &val);
3497         if (ret)
3498                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3499         else {
3500                 priv->debug_level = val;
3501                 if (iwl_alloc_traffic_mem(priv))
3502                         IWL_ERR(priv,
3503                                 "Not enough memory to generate traffic log\n");
3504         }
3505         return strnlen(buf, count);
3506 }
3507
3508 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3509                         show_debug_level, store_debug_level);
3510
3511 #endif /* CONFIG_IWLWIFI_DEBUG */
3512
3513 static ssize_t show_temperature(struct device *d,
3514                                 struct device_attribute *attr, char *buf)
3515 {
3516         struct iwl_priv *priv = dev_get_drvdata(d);
3517
3518         if (!iwl_is_alive(priv))
3519                 return -EAGAIN;
3520
3521         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3522 }
3523
3524 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3525
3526 static ssize_t show_tx_power(struct device *d,
3527                              struct device_attribute *attr, char *buf)
3528 {
3529         struct iwl_priv *priv = dev_get_drvdata(d);
3530         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3531 }
3532
3533 static ssize_t store_tx_power(struct device *d,
3534                               struct device_attribute *attr,
3535                               const char *buf, size_t count)
3536 {
3537         struct iwl_priv *priv = dev_get_drvdata(d);
3538         char *p = (char *)buf;
3539         u32 val;
3540
3541         val = simple_strtoul(p, &p, 10);
3542         if (p == buf)
3543                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3544         else
3545                 iwl3945_hw_reg_set_txpower(priv, val);
3546
3547         return count;
3548 }
3549
3550 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3551
3552 static ssize_t show_flags(struct device *d,
3553                           struct device_attribute *attr, char *buf)
3554 {
3555         struct iwl_priv *priv = dev_get_drvdata(d);
3556
3557         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3558 }
3559
3560 static ssize_t store_flags(struct device *d,
3561                            struct device_attribute *attr,
3562                            const char *buf, size_t count)
3563 {
3564         struct iwl_priv *priv = dev_get_drvdata(d);
3565         u32 flags = simple_strtoul(buf, NULL, 0);
3566
3567         mutex_lock(&priv->mutex);
3568         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3569                 /* Cancel any currently running scans... */
3570                 if (iwl_scan_cancel_timeout(priv, 100))
3571                         IWL_WARN(priv, "Could not cancel scan.\n");
3572                 else {
3573                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3574                                        flags);
3575                         priv->staging_rxon.flags = cpu_to_le32(flags);
3576                         iwlcore_commit_rxon(priv);
3577                 }
3578         }
3579         mutex_unlock(&priv->mutex);
3580
3581         return count;
3582 }
3583
3584 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3585
3586 static ssize_t show_filter_flags(struct device *d,
3587                                  struct device_attribute *attr, char *buf)
3588 {
3589         struct iwl_priv *priv = dev_get_drvdata(d);
3590
3591         return sprintf(buf, "0x%04X\n",
3592                 le32_to_cpu(priv->active_rxon.filter_flags));
3593 }
3594
3595 static ssize_t store_filter_flags(struct device *d,
3596                                   struct device_attribute *attr,
3597                                   const char *buf, size_t count)
3598 {
3599         struct iwl_priv *priv = dev_get_drvdata(d);
3600         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3601
3602         mutex_lock(&priv->mutex);
3603         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3604                 /* Cancel any currently running scans... */
3605                 if (iwl_scan_cancel_timeout(priv, 100))
3606                         IWL_WARN(priv, "Could not cancel scan.\n");
3607                 else {
3608                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3609                                        "0x%04X\n", filter_flags);
3610                         priv->staging_rxon.filter_flags =
3611                                 cpu_to_le32(filter_flags);
3612                         iwlcore_commit_rxon(priv);
3613                 }
3614         }
3615         mutex_unlock(&priv->mutex);
3616
3617         return count;
3618 }
3619
3620 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3621                    store_filter_flags);
3622
3623 static ssize_t show_measurement(struct device *d,
3624                                 struct device_attribute *attr, char *buf)
3625 {
3626         struct iwl_priv *priv = dev_get_drvdata(d);
3627         struct iwl_spectrum_notification measure_report;
3628         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3629         u8 *data = (u8 *)&measure_report;
3630         unsigned long flags;
3631
3632         spin_lock_irqsave(&priv->lock, flags);
3633         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3634                 spin_unlock_irqrestore(&priv->lock, flags);
3635                 return 0;
3636         }
3637         memcpy(&measure_report, &priv->measure_report, size);
3638         priv->measurement_status = 0;
3639         spin_unlock_irqrestore(&priv->lock, flags);
3640
3641         while (size && (PAGE_SIZE - len)) {
3642                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3643                                    PAGE_SIZE - len, 1);
3644                 len = strlen(buf);
3645                 if (PAGE_SIZE - len)
3646                         buf[len++] = '\n';
3647
3648                 ofs += 16;
3649                 size -= min(size, 16U);
3650         }
3651
3652         return len;
3653 }
3654
3655 static ssize_t store_measurement(struct device *d,
3656                                  struct device_attribute *attr,
3657                                  const char *buf, size_t count)
3658 {
3659         struct iwl_priv *priv = dev_get_drvdata(d);
3660         struct ieee80211_measurement_params params = {
3661                 .channel = le16_to_cpu(priv->active_rxon.channel),
3662                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3663                 .duration = cpu_to_le16(1),
3664         };
3665         u8 type = IWL_MEASURE_BASIC;
3666         u8 buffer[32];
3667         u8 channel;
3668
3669         if (count) {
3670                 char *p = buffer;
3671                 strncpy(buffer, buf, min(sizeof(buffer), count));
3672                 channel = simple_strtoul(p, NULL, 0);
3673                 if (channel)
3674                         params.channel = channel;
3675
3676                 p = buffer;
3677                 while (*p && *p != ' ')
3678                         p++;
3679                 if (*p)
3680                         type = simple_strtoul(p + 1, NULL, 0);
3681         }
3682
3683         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3684                        "channel %d (for '%s')\n", type, params.channel, buf);
3685         iwl3945_get_measurement(priv, &params, type);
3686
3687         return count;
3688 }
3689
3690 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3691                    show_measurement, store_measurement);
3692
3693 static ssize_t store_retry_rate(struct device *d,
3694                                 struct device_attribute *attr,
3695                                 const char *buf, size_t count)
3696 {
3697         struct iwl_priv *priv = dev_get_drvdata(d);
3698
3699         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3700         if (priv->retry_rate <= 0)
3701                 priv->retry_rate = 1;
3702
3703         return count;
3704 }
3705
3706 static ssize_t show_retry_rate(struct device *d,
3707                                struct device_attribute *attr, char *buf)
3708 {
3709         struct iwl_priv *priv = dev_get_drvdata(d);
3710         return sprintf(buf, "%d", priv->retry_rate);
3711 }
3712
3713 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3714                    store_retry_rate);
3715
3716
3717 static ssize_t show_channels(struct device *d,
3718                              struct device_attribute *attr, char *buf)
3719 {
3720         /* all this shit doesn't belong into sysfs anyway */
3721         return 0;
3722 }
3723
3724 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3725
3726 static ssize_t show_antenna(struct device *d,
3727                             struct device_attribute *attr, char *buf)
3728 {
3729         struct iwl_priv *priv = dev_get_drvdata(d);
3730
3731         if (!iwl_is_alive(priv))
3732                 return -EAGAIN;
3733
3734         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3735 }
3736
3737 static ssize_t store_antenna(struct device *d,
3738                              struct device_attribute *attr,
3739                              const char *buf, size_t count)
3740 {
3741         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3742         int ant;
3743
3744         if (count == 0)
3745                 return 0;
3746
3747         if (sscanf(buf, "%1i", &ant) != 1) {
3748                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3749                 return count;
3750         }
3751
3752         if ((ant >= 0) && (ant <= 2)) {
3753                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3754                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3755         } else
3756                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3757
3758
3759         return count;
3760 }
3761
3762 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3763
3764 static ssize_t show_status(struct device *d,
3765                            struct device_attribute *attr, char *buf)
3766 {
3767         struct iwl_priv *priv = dev_get_drvdata(d);
3768         if (!iwl_is_alive(priv))
3769                 return -EAGAIN;
3770         return sprintf(buf, "0x%08x\n", (int)priv->status);
3771 }
3772
3773 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3774
3775 static ssize_t dump_error_log(struct device *d,
3776                               struct device_attribute *attr,
3777                               const char *buf, size_t count)
3778 {
3779         struct iwl_priv *priv = dev_get_drvdata(d);
3780         char *p = (char *)buf;
3781
3782         if (p[0] == '1')
3783                 iwl3945_dump_nic_error_log(priv);
3784
3785         return strnlen(buf, count);
3786 }
3787
3788 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3789
3790 /*****************************************************************************
3791  *
3792  * driver setup and tear down
3793  *
3794  *****************************************************************************/
3795
3796 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3797 {
3798         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3799
3800         init_waitqueue_head(&priv->wait_command_queue);
3801
3802         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3803         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3804         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3805         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3806         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3807         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3808         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3809         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3810         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3811         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3812
3813         iwl3945_hw_setup_deferred_work(priv);
3814
3815         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3816                 init_timer(&priv->monitor_recover);
3817                 priv->monitor_recover.data = (unsigned long)priv;
3818                 priv->monitor_recover.function =
3819                         priv->cfg->ops->lib->recover_from_tx_stall;
3820         }
3821
3822         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3823                      iwl3945_irq_tasklet, (unsigned long)priv);
3824 }
3825
3826 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3827 {
3828         iwl3945_hw_cancel_deferred_work(priv);
3829
3830         cancel_delayed_work_sync(&priv->init_alive_start);
3831         cancel_delayed_work(&priv->scan_check);
3832         cancel_delayed_work(&priv->alive_start);
3833         cancel_work_sync(&priv->start_internal_scan);
3834         cancel_work_sync(&priv->beacon_update);
3835         if (priv->cfg->ops->lib->recover_from_tx_stall)
3836                 del_timer_sync(&priv->monitor_recover);
3837 }
3838
3839 static struct attribute *iwl3945_sysfs_entries[] = {
3840         &dev_attr_antenna.attr,
3841         &dev_attr_channels.attr,
3842         &dev_attr_dump_errors.attr,
3843         &dev_attr_flags.attr,
3844         &dev_attr_filter_flags.attr,
3845         &dev_attr_measurement.attr,
3846         &dev_attr_retry_rate.attr,
3847         &dev_attr_status.attr,
3848         &dev_attr_temperature.attr,
3849         &dev_attr_tx_power.attr,
3850 #ifdef CONFIG_IWLWIFI_DEBUG
3851         &dev_attr_debug_level.attr,
3852 #endif
3853         NULL
3854 };
3855
3856 static struct attribute_group iwl3945_attribute_group = {
3857         .name = NULL,           /* put in device directory */
3858         .attrs = iwl3945_sysfs_entries,
3859 };
3860
3861 static struct ieee80211_ops iwl3945_hw_ops = {
3862         .tx = iwl3945_mac_tx,
3863         .start = iwl3945_mac_start,
3864         .stop = iwl3945_mac_stop,
3865         .add_interface = iwl_mac_add_interface,
3866         .remove_interface = iwl_mac_remove_interface,
3867         .config = iwl_mac_config,
3868         .configure_filter = iwl_configure_filter,
3869         .set_key = iwl3945_mac_set_key,
3870         .conf_tx = iwl_mac_conf_tx,
3871         .reset_tsf = iwl_mac_reset_tsf,
3872         .bss_info_changed = iwl_bss_info_changed,
3873         .hw_scan = iwl_mac_hw_scan,
3874         .sta_add = iwl3945_mac_sta_add,
3875         .sta_remove = iwl_mac_sta_remove,
3876 };
3877
3878 static int iwl3945_init_drv(struct iwl_priv *priv)
3879 {
3880         int ret;
3881         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3882
3883         priv->retry_rate = 1;
3884         priv->ibss_beacon = NULL;
3885
3886         spin_lock_init(&priv->sta_lock);
3887         spin_lock_init(&priv->hcmd_lock);
3888
3889         INIT_LIST_HEAD(&priv->free_frames);
3890
3891         mutex_init(&priv->mutex);
3892         mutex_init(&priv->sync_cmd_mutex);
3893
3894         priv->ieee_channels = NULL;
3895         priv->ieee_rates = NULL;
3896         priv->band = IEEE80211_BAND_2GHZ;
3897
3898         priv->iw_mode = NL80211_IFTYPE_STATION;
3899         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3900
3901         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3902
3903         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3904                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3905                          eeprom->version);
3906                 ret = -EINVAL;
3907                 goto err;
3908         }
3909         ret = iwl_init_channel_map(priv);
3910         if (ret) {
3911                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3912                 goto err;
3913         }
3914
3915         /* Set up txpower settings in driver for all channels */
3916         if (iwl3945_txpower_set_from_eeprom(priv)) {
3917                 ret = -EIO;
3918                 goto err_free_channel_map;
3919         }
3920
3921         ret = iwlcore_init_geos(priv);
3922         if (ret) {
3923                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3924                 goto err_free_channel_map;
3925         }
3926         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3927
3928         return 0;
3929
3930 err_free_channel_map:
3931         iwl_free_channel_map(priv);
3932 err:
3933         return ret;
3934 }
3935
3936 #define IWL3945_MAX_PROBE_REQUEST       200
3937
3938 static int iwl3945_setup_mac(struct iwl_priv *priv)
3939 {
3940         int ret;
3941         struct ieee80211_hw *hw = priv->hw;
3942
3943         hw->rate_control_algorithm = "iwl-3945-rs";
3944         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3945         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3946
3947         /* Tell mac80211 our characteristics */
3948         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3949                     IEEE80211_HW_SPECTRUM_MGMT;
3950
3951         if (!priv->cfg->broken_powersave)
3952                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3953                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3954
3955         hw->wiphy->interface_modes =
3956                 BIT(NL80211_IFTYPE_STATION) |
3957                 BIT(NL80211_IFTYPE_ADHOC);
3958
3959         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3960                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3961
3962         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3963         /* we create the 802.11 header and a zero-length SSID element */
3964         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3965
3966         /* Default value; 4 EDCA QOS priorities */
3967         hw->queues = 4;
3968
3969         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3970                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3971                         &priv->bands[IEEE80211_BAND_2GHZ];
3972
3973         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3974                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3975                         &priv->bands[IEEE80211_BAND_5GHZ];
3976
3977         ret = ieee80211_register_hw(priv->hw);
3978         if (ret) {
3979                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3980                 return ret;
3981         }
3982         priv->mac80211_registered = 1;
3983
3984         return 0;
3985 }
3986
3987 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3988 {
3989         int err = 0;
3990         struct iwl_priv *priv;
3991         struct ieee80211_hw *hw;
3992         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3993         struct iwl3945_eeprom *eeprom;
3994         unsigned long flags;
3995
3996         /***********************
3997          * 1. Allocating HW data
3998          * ********************/
3999
4000         /* mac80211 allocates memory for this device instance, including
4001          *   space for this driver's private structure */
4002         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4003         if (hw == NULL) {
4004                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4005                 err = -ENOMEM;
4006                 goto out;
4007         }
4008         priv = hw->priv;
4009         SET_IEEE80211_DEV(hw, &pdev->dev);
4010
4011         /*
4012          * Disabling hardware scan means that mac80211 will perform scans
4013          * "the hard way", rather than using device's scan.
4014          */
4015         if (iwl3945_mod_params.disable_hw_scan) {
4016                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4017                 iwl3945_hw_ops.hw_scan = NULL;
4018         }
4019
4020
4021         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4022         priv->cfg = cfg;
4023         priv->pci_dev = pdev;
4024         priv->inta_mask = CSR_INI_SET_MASK;
4025
4026 #ifdef CONFIG_IWLWIFI_DEBUG
4027         atomic_set(&priv->restrict_refcnt, 0);
4028 #endif
4029         if (iwl_alloc_traffic_mem(priv))
4030                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4031
4032         /***************************
4033          * 2. Initializing PCI bus
4034          * *************************/
4035         if (pci_enable_device(pdev)) {
4036                 err = -ENODEV;
4037                 goto out_ieee80211_free_hw;
4038         }
4039
4040         pci_set_master(pdev);
4041
4042         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4043         if (!err)
4044                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4045         if (err) {
4046                 IWL_WARN(priv, "No suitable DMA available.\n");
4047                 goto out_pci_disable_device;
4048         }
4049
4050         pci_set_drvdata(pdev, priv);
4051         err = pci_request_regions(pdev, DRV_NAME);
4052         if (err)
4053                 goto out_pci_disable_device;
4054
4055         /***********************
4056          * 3. Read REV Register
4057          * ********************/
4058         priv->hw_base = pci_iomap(pdev, 0, 0);
4059         if (!priv->hw_base) {
4060                 err = -ENODEV;
4061                 goto out_pci_release_regions;
4062         }
4063
4064         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4065                         (unsigned long long) pci_resource_len(pdev, 0));
4066         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4067
4068         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4069          * PCI Tx retries from interfering with C3 CPU state */
4070         pci_write_config_byte(pdev, 0x41, 0x00);
4071
4072         /* these spin locks will be used in apm_ops.init and EEPROM access
4073          * we should init now
4074          */
4075         spin_lock_init(&priv->reg_lock);
4076         spin_lock_init(&priv->lock);
4077
4078         /*
4079          * stop and reset the on-board processor just in case it is in a
4080          * strange state ... like being left stranded by a primary kernel
4081          * and this is now the kdump kernel trying to start up
4082          */
4083         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4084
4085         /***********************
4086          * 4. Read EEPROM
4087          * ********************/
4088
4089         /* Read the EEPROM */
4090         err = iwl_eeprom_init(priv);
4091         if (err) {
4092                 IWL_ERR(priv, "Unable to init EEPROM\n");
4093                 goto out_iounmap;
4094         }
4095         /* MAC Address location in EEPROM same for 3945/4965 */
4096         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4097         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4098         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4099         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4100
4101         /***********************
4102          * 5. Setup HW Constants
4103          * ********************/
4104         /* Device-specific setup */
4105         if (iwl3945_hw_set_hw_params(priv)) {
4106                 IWL_ERR(priv, "failed to set hw settings\n");
4107                 goto out_eeprom_free;
4108         }
4109
4110         /***********************
4111          * 6. Setup priv
4112          * ********************/
4113
4114         err = iwl3945_init_drv(priv);
4115         if (err) {
4116                 IWL_ERR(priv, "initializing driver failed\n");
4117                 goto out_unset_hw_params;
4118         }
4119
4120         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4121                 priv->cfg->name);
4122
4123         /***********************
4124          * 7. Setup Services
4125          * ********************/
4126
4127         spin_lock_irqsave(&priv->lock, flags);
4128         iwl_disable_interrupts(priv);
4129         spin_unlock_irqrestore(&priv->lock, flags);
4130
4131         pci_enable_msi(priv->pci_dev);
4132
4133         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4134                           IRQF_SHARED, DRV_NAME, priv);
4135         if (err) {
4136                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4137                 goto out_disable_msi;
4138         }
4139
4140         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4141         if (err) {
4142                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4143                 goto out_release_irq;
4144         }
4145
4146         iwl_set_rxon_channel(priv,
4147                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4148         iwl3945_setup_deferred_work(priv);
4149         iwl3945_setup_rx_handlers(priv);
4150         iwl_power_initialize(priv);
4151
4152         /*********************************
4153          * 8. Setup and Register mac80211
4154          * *******************************/
4155
4156         iwl_enable_interrupts(priv);
4157
4158         err = iwl3945_setup_mac(priv);
4159         if (err)
4160                 goto  out_remove_sysfs;
4161
4162         err = iwl_dbgfs_register(priv, DRV_NAME);
4163         if (err)
4164                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4165
4166         /* Start monitoring the killswitch */
4167         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4168                            2 * HZ);
4169
4170         return 0;
4171
4172  out_remove_sysfs:
4173         destroy_workqueue(priv->workqueue);
4174         priv->workqueue = NULL;
4175         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4176  out_release_irq:
4177         free_irq(priv->pci_dev->irq, priv);
4178  out_disable_msi:
4179         pci_disable_msi(priv->pci_dev);
4180         iwlcore_free_geos(priv);
4181         iwl_free_channel_map(priv);
4182  out_unset_hw_params:
4183         iwl3945_unset_hw_params(priv);
4184  out_eeprom_free:
4185         iwl_eeprom_free(priv);
4186  out_iounmap:
4187         pci_iounmap(pdev, priv->hw_base);
4188  out_pci_release_regions:
4189         pci_release_regions(pdev);
4190  out_pci_disable_device:
4191         pci_set_drvdata(pdev, NULL);
4192         pci_disable_device(pdev);
4193  out_ieee80211_free_hw:
4194         iwl_free_traffic_mem(priv);
4195         ieee80211_free_hw(priv->hw);
4196  out:
4197         return err;
4198 }
4199
4200 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4201 {
4202         struct iwl_priv *priv = pci_get_drvdata(pdev);
4203         unsigned long flags;
4204
4205         if (!priv)
4206                 return;
4207
4208         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4209
4210         iwl_dbgfs_unregister(priv);
4211
4212         set_bit(STATUS_EXIT_PENDING, &priv->status);
4213
4214         if (priv->mac80211_registered) {
4215                 ieee80211_unregister_hw(priv->hw);
4216                 priv->mac80211_registered = 0;
4217         } else {
4218                 iwl3945_down(priv);
4219         }
4220
4221         /*
4222          * Make sure device is reset to low power before unloading driver.
4223          * This may be redundant with iwl_down(), but there are paths to
4224          * run iwl_down() without calling apm_ops.stop(), and there are
4225          * paths to avoid running iwl_down() at all before leaving driver.
4226          * This (inexpensive) call *makes sure* device is reset.
4227          */
4228         priv->cfg->ops->lib->apm_ops.stop(priv);
4229
4230         /* make sure we flush any pending irq or
4231          * tasklet for the driver
4232          */
4233         spin_lock_irqsave(&priv->lock, flags);
4234         iwl_disable_interrupts(priv);
4235         spin_unlock_irqrestore(&priv->lock, flags);
4236
4237         iwl_synchronize_irq(priv);
4238
4239         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4240
4241         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4242
4243         iwl3945_dealloc_ucode_pci(priv);
4244
4245         if (priv->rxq.bd)
4246                 iwl3945_rx_queue_free(priv, &priv->rxq);
4247         iwl3945_hw_txq_ctx_free(priv);
4248
4249         iwl3945_unset_hw_params(priv);
4250
4251         /*netif_stop_queue(dev); */
4252         flush_workqueue(priv->workqueue);
4253
4254         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4255          * priv->workqueue... so we can't take down the workqueue
4256          * until now... */
4257         destroy_workqueue(priv->workqueue);
4258         priv->workqueue = NULL;
4259         iwl_free_traffic_mem(priv);
4260
4261         free_irq(pdev->irq, priv);
4262         pci_disable_msi(pdev);
4263
4264         pci_iounmap(pdev, priv->hw_base);
4265         pci_release_regions(pdev);
4266         pci_disable_device(pdev);
4267         pci_set_drvdata(pdev, NULL);
4268
4269         iwl_free_channel_map(priv);
4270         iwlcore_free_geos(priv);
4271         kfree(priv->scan_cmd);
4272         if (priv->ibss_beacon)
4273                 dev_kfree_skb(priv->ibss_beacon);
4274
4275         ieee80211_free_hw(priv->hw);
4276 }
4277
4278
4279 /*****************************************************************************
4280  *
4281  * driver and module entry point
4282  *
4283  *****************************************************************************/
4284
4285 static struct pci_driver iwl3945_driver = {
4286         .name = DRV_NAME,
4287         .id_table = iwl3945_hw_card_ids,
4288         .probe = iwl3945_pci_probe,
4289         .remove = __devexit_p(iwl3945_pci_remove),
4290 #ifdef CONFIG_PM
4291         .suspend = iwl_pci_suspend,
4292         .resume = iwl_pci_resume,
4293 #endif
4294 };
4295
4296 static int __init iwl3945_init(void)
4297 {
4298
4299         int ret;
4300         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4301         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4302
4303         ret = iwl3945_rate_control_register();
4304         if (ret) {
4305                 printk(KERN_ERR DRV_NAME
4306                        "Unable to register rate control algorithm: %d\n", ret);
4307                 return ret;
4308         }
4309
4310         ret = pci_register_driver(&iwl3945_driver);
4311         if (ret) {
4312                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4313                 goto error_register;
4314         }
4315
4316         return ret;
4317
4318 error_register:
4319         iwl3945_rate_control_unregister();
4320         return ret;
4321 }
4322
4323 static void __exit iwl3945_exit(void)
4324 {
4325         pci_unregister_driver(&iwl3945_driver);
4326         iwl3945_rate_control_unregister();
4327 }
4328
4329 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4330
4331 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4332 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4333 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4334 MODULE_PARM_DESC(swcrypto,
4335                  "using software crypto (default 1 [software])\n");
4336 #ifdef CONFIG_IWLWIFI_DEBUG
4337 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4338 MODULE_PARM_DESC(debug, "debug output mask");
4339 #endif
4340 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4341                    int, S_IRUGO);
4342 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4343 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4344 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4345
4346 module_exit(iwl3945_exit);
4347 module_init(iwl3945_init);