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/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-core.h"
  57 #include "iwl-helpers.h"
  58 #include "iwl-dev.h"
  59 #include "iwl-spectrum.h"
  60
  61 /*
  62  * module name, copyright, version, etc.
  63  */
  64
  65 #define DRV_DESCRIPTION \
  66 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  67
  68 #ifdef CONFIG_IWLWIFI_DEBUG
  69 #define VD "d"
  70 #else
  71 #define VD
  72 #endif
  73
  74 /*
  75  * add "s" to indicate spectrum measurement included.
  76  * we add it here to be consistent with previous releases in which
  77  * this was configurable.
  78  */
  79 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82
  83 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  84 MODULE_VERSION(DRV_VERSION);
  85 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  86 MODULE_LICENSE("GPL");
  87
  88  /* module parameters */
  89 struct iwl_mod_params iwl3945_mod_params = {
  90         .sw_crypto = 1,
  91         .restart_fw = 1,
  92         /* the rest are 0 by default */
  93 };
  94
  95 /**
  96  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  97  * @priv: eeprom and antenna fields are used to determine antenna flags
  98  *
  99  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 100  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 101  *
 102  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 103  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 104  * IWL_ANTENNA_AUX       - Force AUX antenna
 105  */
 106 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 107 {
 108         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 109
 110         switch (iwl3945_mod_params.antenna) {
 111         case IWL_ANTENNA_DIVERSITY:
 112                 return 0;
 113
 114         case IWL_ANTENNA_MAIN:
 115                 if (eeprom->antenna_switch_type)
 116                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 117                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 118
 119         case IWL_ANTENNA_AUX:
 120                 if (eeprom->antenna_switch_type)
 121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 123         }
 124
 125         /* bad antenna selector value */
 126         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 127                 iwl3945_mod_params.antenna);
 128
 129         return 0;               /* "diversity" is default if error */
 130 }
 131
 132 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 133                                    struct ieee80211_key_conf *keyconf,
 134                                    u8 sta_id)
 135 {
 136         unsigned long flags;
 137         __le16 key_flags = 0;
 138         int ret;
 139
 140         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 141         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 142
 143         if (sta_id == priv->hw_params.bcast_sta_id)
 144                 key_flags |= STA_KEY_MULTICAST_MSK;
 145
 146         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 147         keyconf->hw_key_idx = keyconf->keyidx;
 148         key_flags &= ~STA_KEY_FLG_INVALID;
 149
 150         spin_lock_irqsave(&priv->sta_lock, flags);
 151         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 152         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 153         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 154                keyconf->keylen);
 155
 156         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 160                         == STA_KEY_FLG_NO_ENC)
 161                 priv->stations[sta_id].sta.key.key_offset =
 162                                  iwl_get_free_ucode_key_index(priv);
 163         /* else, we are overriding an existing key => no need to allocated room
 164         * in uCode. */
 165
 166         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 167                 "no space for a new key");
 168
 169         priv->stations[sta_id].sta.key.key_flags = key_flags;
 170         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 171         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 172
 173         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 174
 175         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 176
 177         spin_unlock_irqrestore(&priv->sta_lock, flags);
 178
 179         return ret;
 180 }
 181
 182 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 183                                   struct ieee80211_key_conf *keyconf,
 184                                   u8 sta_id)
 185 {
 186         return -EOPNOTSUPP;
 187 }
 188
 189 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 190                                   struct ieee80211_key_conf *keyconf,
 191                                   u8 sta_id)
 192 {
 193         return -EOPNOTSUPP;
 194 }
 195
 196 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 197 {
 198         unsigned long flags;
 199
 200         spin_lock_irqsave(&priv->sta_lock, flags);
 201         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 202         memset(&priv->stations[sta_id].sta.key, 0,
 203                 sizeof(struct iwl4965_keyinfo));
 204         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 205         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 206         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 207         spin_unlock_irqrestore(&priv->sta_lock, flags);
 208
 209         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 210         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 211         return 0;
 212 }
 213
 214 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 215                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 216 {
 217         int ret = 0;
 218
 219         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 220
 221         switch (keyconf->alg) {
 222         case ALG_CCMP:
 223                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 224                 break;
 225         case ALG_TKIP:
 226                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_WEP:
 229                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         default:
 232                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 233                 ret = -EINVAL;
 234         }
 235
 236         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 237                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 238                       sta_id, ret);
 239
 240         return ret;
 241 }
 242
 243 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 244 {
 245         int ret = -EOPNOTSUPP;
 246
 247         return ret;
 248 }
 249
 250 static int iwl3945_set_static_key(struct iwl_priv *priv,
 251                                 struct ieee80211_key_conf *key)
 252 {
 253         if (key->alg == ALG_WEP)
 254                 return -EOPNOTSUPP;
 255
 256         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 257         return -EINVAL;
 258 }
 259
 260 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 261 {
 262         struct list_head *element;
 263
 264         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 265                        priv->frames_count);
 266
 267         while (!list_empty(&priv->free_frames)) {
 268                 element = priv->free_frames.next;
 269                 list_del(element);
 270                 kfree(list_entry(element, struct iwl3945_frame, list));
 271                 priv->frames_count--;
 272         }
 273
 274         if (priv->frames_count) {
 275                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 276                             priv->frames_count);
 277                 priv->frames_count = 0;
 278         }
 279 }
 280
 281 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 282 {
 283         struct iwl3945_frame *frame;
 284         struct list_head *element;
 285         if (list_empty(&priv->free_frames)) {
 286                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 287                 if (!frame) {
 288                         IWL_ERR(priv, "Could not allocate frame!\n");
 289                         return NULL;
 290                 }
 291
 292                 priv->frames_count++;
 293                 return frame;
 294         }
 295
 296         element = priv->free_frames.next;
 297         list_del(element);
 298         return list_entry(element, struct iwl3945_frame, list);
 299 }
 300
 301 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 302 {
 303         memset(frame, 0, sizeof(*frame));
 304         list_add(&frame->list, &priv->free_frames);
 305 }
 306
 307 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 308                                 struct ieee80211_hdr *hdr,
 309                                 int left)
 310 {
 311
 312         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 313             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 314              (priv->iw_mode != NL80211_IFTYPE_AP)))
 315                 return 0;
 316
 317         if (priv->ibss_beacon->len > left)
 318                 return 0;
 319
 320         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 321
 322         return priv->ibss_beacon->len;
 323 }
 324
 325 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 326 {
 327         struct iwl3945_frame *frame;
 328         unsigned int frame_size;
 329         int rc;
 330         u8 rate;
 331
 332         frame = iwl3945_get_free_frame(priv);
 333
 334         if (!frame) {
 335                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 336                           "command.\n");
 337                 return -ENOMEM;
 338         }
 339
 340         rate = iwl_rate_get_lowest_plcp(priv);
 341
 342         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 343
 344         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 345                               &frame->u.cmd[0]);
 346
 347         iwl3945_free_frame(priv, frame);
 348
 349         return rc;
 350 }
 351
 352 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 353 {
 354         if (priv->_3945.shared_virt)
 355                 dma_free_coherent(&priv->pci_dev->dev,
 356                                   sizeof(struct iwl3945_shared),
 357                                   priv->_3945.shared_virt,
 358                                   priv->_3945.shared_phys);
 359 }
 360
 361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 362                                       struct ieee80211_tx_info *info,
 363                                       struct iwl_device_cmd *cmd,
 364                                       struct sk_buff *skb_frag,
 365                                       int sta_id)
 366 {
 367         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 368         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 369
 370         switch (keyinfo->alg) {
 371         case ALG_CCMP:
 372                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 373                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 374                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 375                 break;
 376
 377         case ALG_TKIP:
 378                 break;
 379
 380         case ALG_WEP:
 381                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 382                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 383
 384                 if (keyinfo->keylen == 13)
 385                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 386
 387                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 388
 389                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 390                              "with key %d\n", info->control.hw_key->hw_key_idx);
 391                 break;
 392
 393         default:
 394                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 395                 break;
 396         }
 397 }
 398
 399 /*
 400  * handle build REPLY_TX command notification.
 401  */
 402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 403                                   struct iwl_device_cmd *cmd,
 404                                   struct ieee80211_tx_info *info,
 405                                   struct ieee80211_hdr *hdr, u8 std_id)
 406 {
 407         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 408         __le32 tx_flags = tx_cmd->tx_flags;
 409         __le16 fc = hdr->frame_control;
 410
 411         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 412         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 413                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 414                 if (ieee80211_is_mgmt(fc))
 415                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 416                 if (ieee80211_is_probe_resp(fc) &&
 417                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 418                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 419         } else {
 420                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422         }
 423
 424         tx_cmd->sta_id = std_id;
 425         if (ieee80211_has_morefrags(fc))
 426                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 427
 428         if (ieee80211_is_data_qos(fc)) {
 429                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 430                 tx_cmd->tid_tspec = qc[0] & 0xf;
 431                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 432         } else {
 433                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 434         }
 435
 436         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 437
 438         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 439                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 440
 441         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 442         if (ieee80211_is_mgmt(fc)) {
 443                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 444                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 445                 else
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 447         } else {
 448                 tx_cmd->timeout.pm_frame_timeout = 0;
 449         }
 450
 451         tx_cmd->driver_txop = 0;
 452         tx_cmd->tx_flags = tx_flags;
 453         tx_cmd->next_frame_len = 0;
 454 }
 455
 456 /*
 457  * start REPLY_TX command process
 458  */
 459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 460 {
 461         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 462         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 463         struct iwl3945_tx_cmd *tx_cmd;
 464         struct iwl_tx_queue *txq = NULL;
 465         struct iwl_queue *q = NULL;
 466         struct iwl_device_cmd *out_cmd;
 467         struct iwl_cmd_meta *out_meta;
 468         dma_addr_t phys_addr;
 469         dma_addr_t txcmd_phys;
 470         int txq_id = skb_get_queue_mapping(skb);
 471         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 472         u8 id;
 473         u8 unicast;
 474         u8 sta_id;
 475         u8 tid = 0;
 476         u16 seq_number = 0;
 477         __le16 fc;
 478         u8 wait_write_ptr = 0;
 479         u8 *qc = NULL;
 480         unsigned long flags;
 481
 482         spin_lock_irqsave(&priv->lock, flags);
 483         if (iwl_is_rfkill(priv)) {
 484                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 485                 goto drop_unlock;
 486         }
 487
 488         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 489                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 490                 goto drop_unlock;
 491         }
 492
 493         unicast = !is_multicast_ether_addr(hdr->addr1);
 494         id = 0;
 495
 496         fc = hdr->frame_control;
 497
 498 #ifdef CONFIG_IWLWIFI_DEBUG
 499         if (ieee80211_is_auth(fc))
 500                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 501         else if (ieee80211_is_assoc_req(fc))
 502                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 503         else if (ieee80211_is_reassoc_req(fc))
 504                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 505 #endif
 506
 507         spin_unlock_irqrestore(&priv->lock, flags);
 508
 509         hdr_len = ieee80211_hdrlen(fc);
 510
 511         /* Find index into station table for destination station */
 512         if (!info->control.sta)
 513                 sta_id = priv->hw_params.bcast_sta_id;
 514         else
 515                 sta_id = iwl_sta_id(info->control.sta);
 516         if (sta_id == IWL_INVALID_STATION) {
 517                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 518                                hdr->addr1);
 519                 goto drop;
 520         }
 521
 522         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 523
 524         if (ieee80211_is_data_qos(fc)) {
 525                 qc = ieee80211_get_qos_ctl(hdr);
 526                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 527                 if (unlikely(tid >= MAX_TID_COUNT))
 528                         goto drop;
 529                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 530                                 IEEE80211_SCTL_SEQ;
 531                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 532                         (hdr->seq_ctrl &
 533                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 534                 seq_number += 0x10;
 535         }
 536
 537         /* Descriptor for chosen Tx queue */
 538         txq = &priv->txq[txq_id];
 539         q = &txq->q;
 540
 541         if ((iwl_queue_space(q) < q->high_mark))
 542                 goto drop;
 543
 544         spin_lock_irqsave(&priv->lock, flags);
 545
 546         idx = get_cmd_index(q, q->write_ptr, 0);
 547
 548         /* Set up driver data for this TFD */
 549         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 550         txq->txb[q->write_ptr].skb[0] = skb;
 551
 552         /* Init first empty entry in queue's array of Tx/cmd buffers */
 553         out_cmd = txq->cmd[idx];
 554         out_meta = &txq->meta[idx];
 555         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 556         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 557         memset(tx_cmd, 0, sizeof(*tx_cmd));
 558
 559         /*
 560          * Set up the Tx-command (not MAC!) header.
 561          * Store the chosen Tx queue and TFD index within the sequence field;
 562          * after Tx, uCode's Tx response will return this value so driver can
 563          * locate the frame within the tx queue and do post-tx processing.
 564          */
 565         out_cmd->hdr.cmd = REPLY_TX;
 566         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 567                                 INDEX_TO_SEQ(q->write_ptr)));
 568
 569         /* Copy MAC header from skb into command buffer */
 570         memcpy(tx_cmd->hdr, hdr, hdr_len);
 571
 572
 573         if (info->control.hw_key)
 574                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 575
 576         /* TODO need this for burst mode later on */
 577         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 578
 579         /* set is_hcca to 0; it probably will never be implemented */
 580         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 581
 582         /* Total # bytes to be transmitted */
 583         len = (u16)skb->len;
 584         tx_cmd->len = cpu_to_le16(len);
 585
 586         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 587         iwl_update_stats(priv, true, fc, len);
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 589         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 590
 591         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 592                 txq->need_update = 1;
 593                 if (qc)
 594                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 595         } else {
 596                 wait_write_ptr = 1;
 597                 txq->need_update = 0;
 598         }
 599
 600         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 601                      le16_to_cpu(out_cmd->hdr.sequence));
 602         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 603         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 604         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 605                            ieee80211_hdrlen(fc));
 606
 607         /*
 608          * Use the first empty entry in this queue's command buffer array
 609          * to contain the Tx command and MAC header concatenated together
 610          * (payload data will be in another buffer).
 611          * Size of this varies, due to varying MAC header length.
 612          * If end is not dword aligned, we'll have 2 extra bytes at the end
 613          * of the MAC header (device reads on dword boundaries).
 614          * We'll tell device about this padding later.
 615          */
 616         len = sizeof(struct iwl3945_tx_cmd) +
 617                         sizeof(struct iwl_cmd_header) + hdr_len;
 618
 619         len_org = len;
 620         len = (len + 3) & ~3;
 621
 622         if (len_org != len)
 623                 len_org = 1;
 624         else
 625                 len_org = 0;
 626
 627         /* Physical address of this Tx command's header (not MAC header!),
 628          * within command buffer array. */
 629         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 630                                     len, PCI_DMA_TODEVICE);
 631         /* we do not map meta data ... so we can safely access address to
 632          * provide to unmap command*/
 633         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 634         pci_unmap_len_set(out_meta, len, len);
 635
 636         /* Add buffer containing Tx command and MAC(!) header to TFD's
 637          * first entry */
 638         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 639                                                    txcmd_phys, len, 1, 0);
 640
 641
 642         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 643          * if any (802.11 null frames have no payload). */
 644         len = skb->len - hdr_len;
 645         if (len) {
 646                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 647                                            len, PCI_DMA_TODEVICE);
 648                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 649                                                            phys_addr, len,
 650                                                            0, U32_PAD(len));
 651         }
 652
 653
 654         /* Tell device the write index *just past* this latest filled TFD */
 655         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 656         iwl_txq_update_write_ptr(priv, txq);
 657         spin_unlock_irqrestore(&priv->lock, flags);
 658
 659         if ((iwl_queue_space(q) < q->high_mark)
 660             && priv->mac80211_registered) {
 661                 if (wait_write_ptr) {
 662                         spin_lock_irqsave(&priv->lock, flags);
 663                         txq->need_update = 1;
 664                         iwl_txq_update_write_ptr(priv, txq);
 665                         spin_unlock_irqrestore(&priv->lock, flags);
 666                 }
 667
 668                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 669         }
 670
 671         return 0;
 672
 673 drop_unlock:
 674         spin_unlock_irqrestore(&priv->lock, flags);
 675 drop:
 676         return -1;
 677 }
 678
 679 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 680 #define BEACON_TIME_MASK_HIGH   0xFF000000
 681 #define TIME_UNIT               1024
 682
 683 /*
 684  * extended beacon time format
 685  * time in usec will be changed into a 32-bit value in 8:24 format
 686  * the high 1 byte is the beacon counts
 687  * the lower 3 bytes is the time in usec within one beacon interval
 688  */
 689
 690 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 691 {
 692         u32 quot;
 693         u32 rem;
 694         u32 interval = beacon_interval * 1024;
 695
 696         if (!interval || !usec)
 697                 return 0;
 698
 699         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 700         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 701
 702         return (quot << 24) + rem;
 703 }
 704
 705 /* base is usually what we get from ucode with each received frame,
 706  * the same as HW timer counter counting down
 707  */
 708
 709 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 710 {
 711         u32 base_low = base & BEACON_TIME_MASK_LOW;
 712         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 713         u32 interval = beacon_interval * TIME_UNIT;
 714         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 715             (addon & BEACON_TIME_MASK_HIGH);
 716
 717         if (base_low > addon_low)
 718                 res += base_low - addon_low;
 719         else if (base_low < addon_low) {
 720                 res += interval + base_low - addon_low;
 721                 res += (1 << 24);
 722         } else
 723                 res += (1 << 24);
 724
 725         return cpu_to_le32(res);
 726 }
 727
 728 static int iwl3945_get_measurement(struct iwl_priv *priv,
 729                                struct ieee80211_measurement_params *params,
 730                                u8 type)
 731 {
 732         struct iwl_spectrum_cmd spectrum;
 733         struct iwl_rx_packet *pkt;
 734         struct iwl_host_cmd cmd = {
 735                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 736                 .data = (void *)&spectrum,
 737                 .flags = CMD_WANT_SKB,
 738         };
 739         u32 add_time = le64_to_cpu(params->start_time);
 740         int rc;
 741         int spectrum_resp_status;
 742         int duration = le16_to_cpu(params->duration);
 743
 744         if (iwl_is_associated(priv))
 745                 add_time =
 746                     iwl3945_usecs_to_beacons(
 747                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 748                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 749
 750         memset(&spectrum, 0, sizeof(spectrum));
 751
 752         spectrum.channel_count = cpu_to_le16(1);
 753         spectrum.flags =
 754             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 755         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 756         cmd.len = sizeof(spectrum);
 757         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 758
 759         if (iwl_is_associated(priv))
 760                 spectrum.start_time =
 761                     iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
 762                                 add_time,
 763                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 764         else
 765                 spectrum.start_time = 0;
 766
 767         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 768         spectrum.channels[0].channel = params->channel;
 769         spectrum.channels[0].type = type;
 770         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 771                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 772                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 773
 774         rc = iwl_send_cmd_sync(priv, &cmd);
 775         if (rc)
 776                 return rc;
 777
 778         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 779         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 780                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 781                 rc = -EIO;
 782         }
 783
 784         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 785         switch (spectrum_resp_status) {
 786         case 0:         /* Command will be handled */
 787                 if (pkt->u.spectrum.id != 0xff) {
 788                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 789                                                 pkt->u.spectrum.id);
 790                         priv->measurement_status &= ~MEASUREMENT_READY;
 791                 }
 792                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 793                 rc = 0;
 794                 break;
 795
 796         case 1:         /* Command will not be handled */
 797                 rc = -EAGAIN;
 798                 break;
 799         }
 800
 801         iwl_free_pages(priv, cmd.reply_page);
 802
 803         return rc;
 804 }
 805
 806 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 807                                struct iwl_rx_mem_buffer *rxb)
 808 {
 809         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 810         struct iwl_alive_resp *palive;
 811         struct delayed_work *pwork;
 812
 813         palive = &pkt->u.alive_frame;
 814
 815         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 816                        "0x%01X 0x%01X\n",
 817                        palive->is_valid, palive->ver_type,
 818                        palive->ver_subtype);
 819
 820         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 821                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 822                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 823                        sizeof(struct iwl_alive_resp));
 824                 pwork = &priv->init_alive_start;
 825         } else {
 826                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 827                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 828                        sizeof(struct iwl_alive_resp));
 829                 pwork = &priv->alive_start;
 830                 iwl3945_disable_events(priv);
 831         }
 832
 833         /* We delay the ALIVE response by 5ms to
 834          * give the HW RF Kill time to activate... */
 835         if (palive->is_valid == UCODE_VALID_OK)
 836                 queue_delayed_work(priv->workqueue, pwork,
 837                                    msecs_to_jiffies(5));
 838         else
 839                 IWL_WARN(priv, "uCode did not respond OK.\n");
 840 }
 841
 842 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 843                                  struct iwl_rx_mem_buffer *rxb)
 844 {
 845 #ifdef CONFIG_IWLWIFI_DEBUG
 846         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 847 #endif
 848
 849         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 850         return;
 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_channels_for_scan(struct iwl_priv *priv,
1848                                          enum ieee80211_band band,
1849                                      u8 is_active, u8 n_probes,
1850                                      struct iwl3945_scan_channel *scan_ch,
1851                                      struct ieee80211_vif *vif)
1852 {
1853         struct ieee80211_channel *chan;
1854         const struct ieee80211_supported_band *sband;
1855         const struct iwl_channel_info *ch_info;
1856         u16 passive_dwell = 0;
1857         u16 active_dwell = 0;
1858         int added, i;
1859
1860         sband = iwl_get_hw_mode(priv, band);
1861         if (!sband)
1862                 return 0;
1863
1864         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
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         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1871                 chan = priv->scan_request->channels[i];
1872
1873                 if (chan->band != band)
1874                         continue;
1875
1876                 scan_ch->channel = chan->hw_value;
1877
1878                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1879                 if (!is_channel_valid(ch_info)) {
1880                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1881                                        scan_ch->channel);
1882                         continue;
1883                 }
1884
1885                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1886                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1887                 /* If passive , set up for auto-switch
1888                  *  and use long active_dwell time.
1889                  */
1890                 if (!is_active || is_channel_passive(ch_info) ||
1891                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1892                         scan_ch->type = 0;      /* passive */
1893                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1894                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1895                 } else {
1896                         scan_ch->type = 1;      /* active */
1897                 }
1898
1899                 /* Set direct probe bits. These may be used both for active
1900                  * scan channels (probes gets sent right away),
1901                  * or for passive channels (probes get se sent only after
1902                  * hearing clear Rx packet).*/
1903                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1904                         if (n_probes)
1905                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1906                 } else {
1907                         /* uCode v1 does not allow setting direct probe bits on
1908                          * passive channel. */
1909                         if ((scan_ch->type & 1) && n_probes)
1910                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1911                 }
1912
1913                 /* Set txpower levels to defaults */
1914                 scan_ch->tpc.dsp_atten = 110;
1915                 /* scan_pwr_info->tpc.dsp_atten; */
1916
1917                 /*scan_pwr_info->tpc.tx_gain; */
1918                 if (band == IEEE80211_BAND_5GHZ)
1919                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1920                 else {
1921                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1922                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1923                          * power level:
1924                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1925                          */
1926                 }
1927
1928                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1929                                scan_ch->channel,
1930                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1931                                (scan_ch->type & 1) ?
1932                                active_dwell : passive_dwell);
1933
1934                 scan_ch++;
1935                 added++;
1936         }
1937
1938         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1939         return added;
1940 }
1941
1942 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1943                               struct ieee80211_rate *rates)
1944 {
1945         int i;
1946
1947         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1948                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1949                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1950                 rates[i].hw_value_short = i;
1951                 rates[i].flags = 0;
1952                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1953                         /*
1954                          * If CCK != 1M then set short preamble rate flag.
1955                          */
1956                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1957                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1958                 }
1959         }
1960 }
1961
1962 /******************************************************************************
1963  *
1964  * uCode download functions
1965  *
1966  ******************************************************************************/
1967
1968 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1969 {
1970         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1971         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1972         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1973         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1974         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1975         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1976 }
1977
1978 /**
1979  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1980  *     looking at all data.
1981  */
1982 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1983 {
1984         u32 val;
1985         u32 save_len = len;
1986         int rc = 0;
1987         u32 errcnt;
1988
1989         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1990
1991         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1992                                IWL39_RTC_INST_LOWER_BOUND);
1993
1994         errcnt = 0;
1995         for (; len > 0; len -= sizeof(u32), image++) {
1996                 /* read data comes through single port, auto-incr addr */
1997                 /* NOTE: Use the debugless read so we don't flood kernel log
1998                  * if IWL_DL_IO is set */
1999                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2000                 if (val != le32_to_cpu(*image)) {
2001                         IWL_ERR(priv, "uCode INST section is invalid at "
2002                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2003                                   save_len - len, val, le32_to_cpu(*image));
2004                         rc = -EIO;
2005                         errcnt++;
2006                         if (errcnt >= 20)
2007                                 break;
2008                 }
2009         }
2010
2011
2012         if (!errcnt)
2013                 IWL_DEBUG_INFO(priv,
2014                         "ucode image in INSTRUCTION memory is good\n");
2015
2016         return rc;
2017 }
2018
2019
2020 /**
2021  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2022  *   using sample data 100 bytes apart.  If these sample points are good,
2023  *   it's a pretty good bet that everything between them is good, too.
2024  */
2025 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2026 {
2027         u32 val;
2028         int rc = 0;
2029         u32 errcnt = 0;
2030         u32 i;
2031
2032         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2033
2034         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2035                 /* read data comes through single port, auto-incr addr */
2036                 /* NOTE: Use the debugless read so we don't flood kernel log
2037                  * if IWL_DL_IO is set */
2038                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2039                         i + IWL39_RTC_INST_LOWER_BOUND);
2040                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2041                 if (val != le32_to_cpu(*image)) {
2042 #if 0 /* Enable this if you want to see details */
2043                         IWL_ERR(priv, "uCode INST section is invalid at "
2044                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2045                                   i, val, *image);
2046 #endif
2047                         rc = -EIO;
2048                         errcnt++;
2049                         if (errcnt >= 3)
2050                                 break;
2051                 }
2052         }
2053
2054         return rc;
2055 }
2056
2057
2058 /**
2059  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2060  *    and verify its contents
2061  */
2062 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2063 {
2064         __le32 *image;
2065         u32 len;
2066         int rc = 0;
2067
2068         /* Try bootstrap */
2069         image = (__le32 *)priv->ucode_boot.v_addr;
2070         len = priv->ucode_boot.len;
2071         rc = iwl3945_verify_inst_sparse(priv, image, len);
2072         if (rc == 0) {
2073                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2074                 return 0;
2075         }
2076
2077         /* Try initialize */
2078         image = (__le32 *)priv->ucode_init.v_addr;
2079         len = priv->ucode_init.len;
2080         rc = iwl3945_verify_inst_sparse(priv, image, len);
2081         if (rc == 0) {
2082                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2083                 return 0;
2084         }
2085
2086         /* Try runtime/protocol */
2087         image = (__le32 *)priv->ucode_code.v_addr;
2088         len = priv->ucode_code.len;
2089         rc = iwl3945_verify_inst_sparse(priv, image, len);
2090         if (rc == 0) {
2091                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2092                 return 0;
2093         }
2094
2095         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2096
2097         /* Since nothing seems to match, show first several data entries in
2098          * instruction SRAM, so maybe visual inspection will give a clue.
2099          * Selection of bootstrap image (vs. other images) is arbitrary. */
2100         image = (__le32 *)priv->ucode_boot.v_addr;
2101         len = priv->ucode_boot.len;
2102         rc = iwl3945_verify_inst_full(priv, image, len);
2103
2104         return rc;
2105 }
2106
2107 static void iwl3945_nic_start(struct iwl_priv *priv)
2108 {
2109         /* Remove all resets to allow NIC to operate */
2110         iwl_write32(priv, CSR_RESET, 0);
2111 }
2112
2113 #define IWL3945_UCODE_GET(item)                                         \
2114 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2115 {                                                                       \
2116         return le32_to_cpu(ucode->u.v1.item);                           \
2117 }
2118
2119 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2120 {
2121         return 24;
2122 }
2123
2124 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2125 {
2126         return (u8 *) ucode->u.v1.data;
2127 }
2128
2129 IWL3945_UCODE_GET(inst_size);
2130 IWL3945_UCODE_GET(data_size);
2131 IWL3945_UCODE_GET(init_size);
2132 IWL3945_UCODE_GET(init_data_size);
2133 IWL3945_UCODE_GET(boot_size);
2134
2135 /**
2136  * iwl3945_read_ucode - Read uCode images from disk file.
2137  *
2138  * Copy into buffers for card to fetch via bus-mastering
2139  */
2140 static int iwl3945_read_ucode(struct iwl_priv *priv)
2141 {
2142         const struct iwl_ucode_header *ucode;
2143         int ret = -EINVAL, index;
2144         const struct firmware *ucode_raw;
2145         /* firmware file name contains uCode/driver compatibility version */
2146         const char *name_pre = priv->cfg->fw_name_pre;
2147         const unsigned int api_max = priv->cfg->ucode_api_max;
2148         const unsigned int api_min = priv->cfg->ucode_api_min;
2149         char buf[25];
2150         u8 *src;
2151         size_t len;
2152         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2153
2154         /* Ask kernel firmware_class module to get the boot firmware off disk.
2155          * request_firmware() is synchronous, file is in memory on return. */
2156         for (index = api_max; index >= api_min; index--) {
2157                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2158                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2159                 if (ret < 0) {
2160                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2161                                   buf, ret);
2162                         if (ret == -ENOENT)
2163                                 continue;
2164                         else
2165                                 goto error;
2166                 } else {
2167                         if (index < api_max)
2168                                 IWL_ERR(priv, "Loaded firmware %s, "
2169                                         "which is deprecated. "
2170                                         " Please use API v%u instead.\n",
2171                                           buf, api_max);
2172                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2173                                        "(%zd bytes) from disk\n",
2174                                        buf, ucode_raw->size);
2175                         break;
2176                 }
2177         }
2178
2179         if (ret < 0)
2180                 goto error;
2181
2182         /* Make sure that we got at least our header! */
2183         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2184                 IWL_ERR(priv, "File size way too small!\n");
2185                 ret = -EINVAL;
2186                 goto err_release;
2187         }
2188
2189         /* Data from ucode file:  header followed by uCode images */
2190         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2191
2192         priv->ucode_ver = le32_to_cpu(ucode->ver);
2193         api_ver = IWL_UCODE_API(priv->ucode_ver);
2194         inst_size = iwl3945_ucode_get_inst_size(ucode);
2195         data_size = iwl3945_ucode_get_data_size(ucode);
2196         init_size = iwl3945_ucode_get_init_size(ucode);
2197         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2198         boot_size = iwl3945_ucode_get_boot_size(ucode);
2199         src = iwl3945_ucode_get_data(ucode);
2200
2201         /* api_ver should match the api version forming part of the
2202          * firmware filename ... but we don't check for that and only rely
2203          * on the API version read from firmware header from here on forward */
2204
2205         if (api_ver < api_min || api_ver > api_max) {
2206                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2207                           "Driver supports v%u, firmware is v%u.\n",
2208                           api_max, api_ver);
2209                 priv->ucode_ver = 0;
2210                 ret = -EINVAL;
2211                 goto err_release;
2212         }
2213         if (api_ver != api_max)
2214                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2215                           "got %u. New firmware can be obtained "
2216                           "from http://www.intellinuxwireless.org.\n",
2217                           api_max, api_ver);
2218
2219         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2220                 IWL_UCODE_MAJOR(priv->ucode_ver),
2221                 IWL_UCODE_MINOR(priv->ucode_ver),
2222                 IWL_UCODE_API(priv->ucode_ver),
2223                 IWL_UCODE_SERIAL(priv->ucode_ver));
2224
2225         snprintf(priv->hw->wiphy->fw_version,
2226                  sizeof(priv->hw->wiphy->fw_version),
2227                  "%u.%u.%u.%u",
2228                  IWL_UCODE_MAJOR(priv->ucode_ver),
2229                  IWL_UCODE_MINOR(priv->ucode_ver),
2230                  IWL_UCODE_API(priv->ucode_ver),
2231                  IWL_UCODE_SERIAL(priv->ucode_ver));
2232
2233         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2234                        priv->ucode_ver);
2235         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2236                        inst_size);
2237         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2238                        data_size);
2239         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2240                        init_size);
2241         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2242                        init_data_size);
2243         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2244                        boot_size);
2245
2246
2247         /* Verify size of file vs. image size info in file's header */
2248         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2249                 inst_size + data_size + init_size +
2250                 init_data_size + boot_size) {
2251
2252                 IWL_DEBUG_INFO(priv,
2253                         "uCode file size %zd does not match expected size\n",
2254                         ucode_raw->size);
2255                 ret = -EINVAL;
2256                 goto err_release;
2257         }
2258
2259         /* Verify that uCode images will fit in card's SRAM */
2260         if (inst_size > IWL39_MAX_INST_SIZE) {
2261                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2262                                inst_size);
2263                 ret = -EINVAL;
2264                 goto err_release;
2265         }
2266
2267         if (data_size > IWL39_MAX_DATA_SIZE) {
2268                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2269                                data_size);
2270                 ret = -EINVAL;
2271                 goto err_release;
2272         }
2273         if (init_size > IWL39_MAX_INST_SIZE) {
2274                 IWL_DEBUG_INFO(priv,
2275                                 "uCode init instr len %d too large to fit in\n",
2276                                 init_size);
2277                 ret = -EINVAL;
2278                 goto err_release;
2279         }
2280         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2281                 IWL_DEBUG_INFO(priv,
2282                                 "uCode init data len %d too large to fit in\n",
2283                                 init_data_size);
2284                 ret = -EINVAL;
2285                 goto err_release;
2286         }
2287         if (boot_size > IWL39_MAX_BSM_SIZE) {
2288                 IWL_DEBUG_INFO(priv,
2289                                 "uCode boot instr len %d too large to fit in\n",
2290                                 boot_size);
2291                 ret = -EINVAL;
2292                 goto err_release;
2293         }
2294
2295         /* Allocate ucode buffers for card's bus-master loading ... */
2296
2297         /* Runtime instructions and 2 copies of data:
2298          * 1) unmodified from disk
2299          * 2) backup cache for save/restore during power-downs */
2300         priv->ucode_code.len = inst_size;
2301         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2302
2303         priv->ucode_data.len = data_size;
2304         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2305
2306         priv->ucode_data_backup.len = data_size;
2307         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2308
2309         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2310             !priv->ucode_data_backup.v_addr)
2311                 goto err_pci_alloc;
2312
2313         /* Initialization instructions and data */
2314         if (init_size && init_data_size) {
2315                 priv->ucode_init.len = init_size;
2316                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2317
2318                 priv->ucode_init_data.len = init_data_size;
2319                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2320
2321                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2322                         goto err_pci_alloc;
2323         }
2324
2325         /* Bootstrap (instructions only, no data) */
2326         if (boot_size) {
2327                 priv->ucode_boot.len = boot_size;
2328                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2329
2330                 if (!priv->ucode_boot.v_addr)
2331                         goto err_pci_alloc;
2332         }
2333
2334         /* Copy images into buffers for card's bus-master reads ... */
2335
2336         /* Runtime instructions (first block of data in file) */
2337         len = inst_size;
2338         IWL_DEBUG_INFO(priv,
2339                 "Copying (but not loading) uCode instr len %zd\n", len);
2340         memcpy(priv->ucode_code.v_addr, src, len);
2341         src += len;
2342
2343         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2344                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2345
2346         /* Runtime data (2nd block)
2347          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2348         len = data_size;
2349         IWL_DEBUG_INFO(priv,
2350                 "Copying (but not loading) uCode data len %zd\n", len);
2351         memcpy(priv->ucode_data.v_addr, src, len);
2352         memcpy(priv->ucode_data_backup.v_addr, src, len);
2353         src += len;
2354
2355         /* Initialization instructions (3rd block) */
2356         if (init_size) {
2357                 len = init_size;
2358                 IWL_DEBUG_INFO(priv,
2359                         "Copying (but not loading) init instr len %zd\n", len);
2360                 memcpy(priv->ucode_init.v_addr, src, len);
2361                 src += len;
2362         }
2363
2364         /* Initialization data (4th block) */
2365         if (init_data_size) {
2366                 len = init_data_size;
2367                 IWL_DEBUG_INFO(priv,
2368                         "Copying (but not loading) init data len %zd\n", len);
2369                 memcpy(priv->ucode_init_data.v_addr, src, len);
2370                 src += len;
2371         }
2372
2373         /* Bootstrap instructions (5th block) */
2374         len = boot_size;
2375         IWL_DEBUG_INFO(priv,
2376                 "Copying (but not loading) boot instr len %zd\n", len);
2377         memcpy(priv->ucode_boot.v_addr, src, len);
2378
2379         /* We have our copies now, allow OS release its copies */
2380         release_firmware(ucode_raw);
2381         return 0;
2382
2383  err_pci_alloc:
2384         IWL_ERR(priv, "failed to allocate pci memory\n");
2385         ret = -ENOMEM;
2386         iwl3945_dealloc_ucode_pci(priv);
2387
2388  err_release:
2389         release_firmware(ucode_raw);
2390
2391  error:
2392         return ret;
2393 }
2394
2395
2396 /**
2397  * iwl3945_set_ucode_ptrs - Set uCode address location
2398  *
2399  * Tell initialization uCode where to find runtime uCode.
2400  *
2401  * BSM registers initially contain pointers to initialization uCode.
2402  * We need to replace them to load runtime uCode inst and data,
2403  * and to save runtime data when powering down.
2404  */
2405 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2406 {
2407         dma_addr_t pinst;
2408         dma_addr_t pdata;
2409
2410         /* bits 31:0 for 3945 */
2411         pinst = priv->ucode_code.p_addr;
2412         pdata = priv->ucode_data_backup.p_addr;
2413
2414         /* Tell bootstrap uCode where to find image to load */
2415         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2416         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2417         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2418                                  priv->ucode_data.len);
2419
2420         /* Inst byte count must be last to set up, bit 31 signals uCode
2421          *   that all new ptr/size info is in place */
2422         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2423                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2424
2425         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2426
2427         return 0;
2428 }
2429
2430 /**
2431  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2432  *
2433  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2434  *
2435  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2436  */
2437 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2438 {
2439         /* Check alive response for "valid" sign from uCode */
2440         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2441                 /* We had an error bringing up the hardware, so take it
2442                  * all the way back down so we can try again */
2443                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2444                 goto restart;
2445         }
2446
2447         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2448          * This is a paranoid check, because we would not have gotten the
2449          * "initialize" alive if code weren't properly loaded.  */
2450         if (iwl3945_verify_ucode(priv)) {
2451                 /* Runtime instruction load was bad;
2452                  * take it all the way back down so we can try again */
2453                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2454                 goto restart;
2455         }
2456
2457         /* Send pointers to protocol/runtime uCode image ... init code will
2458          * load and launch runtime uCode, which will send us another "Alive"
2459          * notification. */
2460         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2461         if (iwl3945_set_ucode_ptrs(priv)) {
2462                 /* Runtime instruction load won't happen;
2463                  * take it all the way back down so we can try again */
2464                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2465                 goto restart;
2466         }
2467         return;
2468
2469  restart:
2470         queue_work(priv->workqueue, &priv->restart);
2471 }
2472
2473 /**
2474  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2475  *                   from protocol/runtime uCode (initialization uCode's
2476  *                   Alive gets handled by iwl3945_init_alive_start()).
2477  */
2478 static void iwl3945_alive_start(struct iwl_priv *priv)
2479 {
2480         int thermal_spin = 0;
2481         u32 rfkill;
2482
2483         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2484
2485         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2486                 /* We had an error bringing up the hardware, so take it
2487                  * all the way back down so we can try again */
2488                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2489                 goto restart;
2490         }
2491
2492         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2493          * This is a paranoid check, because we would not have gotten the
2494          * "runtime" alive if code weren't properly loaded.  */
2495         if (iwl3945_verify_ucode(priv)) {
2496                 /* Runtime instruction load was bad;
2497                  * take it all the way back down so we can try again */
2498                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2499                 goto restart;
2500         }
2501
2502         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2503         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2504
2505         if (rfkill & 0x1) {
2506                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2507                 /* if RFKILL is not on, then wait for thermal
2508                  * sensor in adapter to kick in */
2509                 while (iwl3945_hw_get_temperature(priv) == 0) {
2510                         thermal_spin++;
2511                         udelay(10);
2512                 }
2513
2514                 if (thermal_spin)
2515                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2516                                        thermal_spin * 10);
2517         } else
2518                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2519
2520         /* After the ALIVE response, we can send commands to 3945 uCode */
2521         set_bit(STATUS_ALIVE, &priv->status);
2522
2523         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2524                 /* Enable timer to monitor the driver queues */
2525                 mod_timer(&priv->monitor_recover,
2526                         jiffies +
2527                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2528         }
2529
2530         if (iwl_is_rfkill(priv))
2531                 return;
2532
2533         ieee80211_wake_queues(priv->hw);
2534
2535         priv->active_rate = IWL_RATES_MASK;
2536
2537         iwl_power_update_mode(priv, true);
2538
2539         if (iwl_is_associated(priv)) {
2540                 struct iwl3945_rxon_cmd *active_rxon =
2541                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2542
2543                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2544                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2545         } else {
2546                 /* Initialize our rx_config data */
2547                 iwl_connection_init_rx_config(priv, NULL);
2548         }
2549
2550         /* Configure Bluetooth device coexistence support */
2551         priv->cfg->ops->hcmd->send_bt_config(priv);
2552
2553         /* Configure the adapter for unassociated operation */
2554         iwlcore_commit_rxon(priv);
2555
2556         iwl3945_reg_txpower_periodic(priv);
2557
2558         iwl_leds_init(priv);
2559
2560         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2561         set_bit(STATUS_READY, &priv->status);
2562         wake_up_interruptible(&priv->wait_command_queue);
2563
2564         return;
2565
2566  restart:
2567         queue_work(priv->workqueue, &priv->restart);
2568 }
2569
2570 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2571
2572 static void __iwl3945_down(struct iwl_priv *priv)
2573 {
2574         unsigned long flags;
2575         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2576         struct ieee80211_conf *conf = NULL;
2577
2578         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2579
2580         conf = ieee80211_get_hw_conf(priv->hw);
2581
2582         if (!exit_pending)
2583                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2584
2585         /* Station information will now be cleared in device */
2586         iwl_clear_ucode_stations(priv);
2587         iwl_dealloc_bcast_station(priv);
2588
2589         /* Unblock any waiting calls */
2590         wake_up_interruptible_all(&priv->wait_command_queue);
2591
2592         /* Wipe out the EXIT_PENDING status bit if we are not actually
2593          * exiting the module */
2594         if (!exit_pending)
2595                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2596
2597         /* stop and reset the on-board processor */
2598         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2599
2600         /* tell the device to stop sending interrupts */
2601         spin_lock_irqsave(&priv->lock, flags);
2602         iwl_disable_interrupts(priv);
2603         spin_unlock_irqrestore(&priv->lock, flags);
2604         iwl_synchronize_irq(priv);
2605
2606         if (priv->mac80211_registered)
2607                 ieee80211_stop_queues(priv->hw);
2608
2609         /* If we have not previously called iwl3945_init() then
2610          * clear all bits but the RF Kill bits and return */
2611         if (!iwl_is_init(priv)) {
2612                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2613                                         STATUS_RF_KILL_HW |
2614                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2615                                         STATUS_GEO_CONFIGURED |
2616                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2617                                         STATUS_EXIT_PENDING;
2618                 goto exit;
2619         }
2620
2621         /* ...otherwise clear out all the status bits but the RF Kill
2622          * bit and continue taking the NIC down. */
2623         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2624                                 STATUS_RF_KILL_HW |
2625                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2626                                 STATUS_GEO_CONFIGURED |
2627                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2628                                 STATUS_FW_ERROR |
2629                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2630                                 STATUS_EXIT_PENDING;
2631
2632         iwl3945_hw_txq_ctx_stop(priv);
2633         iwl3945_hw_rxq_stop(priv);
2634
2635         /* Power-down device's busmaster DMA clocks */
2636         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2637         udelay(5);
2638
2639         /* Stop the device, and put it in low power state */
2640         priv->cfg->ops->lib->apm_ops.stop(priv);
2641
2642  exit:
2643         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2644
2645         if (priv->ibss_beacon)
2646                 dev_kfree_skb(priv->ibss_beacon);
2647         priv->ibss_beacon = NULL;
2648
2649         /* clear out any free frames */
2650         iwl3945_clear_free_frames(priv);
2651 }
2652
2653 static void iwl3945_down(struct iwl_priv *priv)
2654 {
2655         mutex_lock(&priv->mutex);
2656         __iwl3945_down(priv);
2657         mutex_unlock(&priv->mutex);
2658
2659         iwl3945_cancel_deferred_work(priv);
2660 }
2661
2662 #define MAX_HW_RESTARTS 5
2663
2664 static int __iwl3945_up(struct iwl_priv *priv)
2665 {
2666         int rc, i;
2667
2668         rc = iwl_alloc_bcast_station(priv, false);
2669         if (rc)
2670                 return rc;
2671
2672         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2673                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2674                 return -EIO;
2675         }
2676
2677         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2678                 IWL_ERR(priv, "ucode not available for device bring up\n");
2679                 return -EIO;
2680         }
2681
2682         /* If platform's RF_KILL switch is NOT set to KILL */
2683         if (iwl_read32(priv, CSR_GP_CNTRL) &
2684                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2685                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2686         else {
2687                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2688                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2689                 return -ENODEV;
2690         }
2691
2692         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2693
2694         rc = iwl3945_hw_nic_init(priv);
2695         if (rc) {
2696                 IWL_ERR(priv, "Unable to int nic\n");
2697                 return rc;
2698         }
2699
2700         /* make sure rfkill handshake bits are cleared */
2701         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2702         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2703                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2704
2705         /* clear (again), then enable host interrupts */
2706         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2707         iwl_enable_interrupts(priv);
2708
2709         /* really make sure rfkill handshake bits are cleared */
2710         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2711         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2712
2713         /* Copy original ucode data image from disk into backup cache.
2714          * This will be used to initialize the on-board processor's
2715          * data SRAM for a clean start when the runtime program first loads. */
2716         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2717                priv->ucode_data.len);
2718
2719         /* We return success when we resume from suspend and rf_kill is on. */
2720         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2721                 return 0;
2722
2723         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2724
2725                 /* load bootstrap state machine,
2726                  * load bootstrap program into processor's memory,
2727                  * prepare to load the "initialize" uCode */
2728                 rc = priv->cfg->ops->lib->load_ucode(priv);
2729
2730                 if (rc) {
2731                         IWL_ERR(priv,
2732                                 "Unable to set up bootstrap uCode: %d\n", rc);
2733                         continue;
2734                 }
2735
2736                 /* start card; "initialize" will load runtime ucode */
2737                 iwl3945_nic_start(priv);
2738
2739                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2740
2741                 return 0;
2742         }
2743
2744         set_bit(STATUS_EXIT_PENDING, &priv->status);
2745         __iwl3945_down(priv);
2746         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2747
2748         /* tried to restart and config the device for as long as our
2749          * patience could withstand */
2750         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2751         return -EIO;
2752 }
2753
2754
2755 /*****************************************************************************
2756  *
2757  * Workqueue callbacks
2758  *
2759  *****************************************************************************/
2760
2761 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2762 {
2763         struct iwl_priv *priv =
2764             container_of(data, struct iwl_priv, init_alive_start.work);
2765
2766         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2767                 return;
2768
2769         mutex_lock(&priv->mutex);
2770         iwl3945_init_alive_start(priv);
2771         mutex_unlock(&priv->mutex);
2772 }
2773
2774 static void iwl3945_bg_alive_start(struct work_struct *data)
2775 {
2776         struct iwl_priv *priv =
2777             container_of(data, struct iwl_priv, alive_start.work);
2778
2779         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2780                 return;
2781
2782         mutex_lock(&priv->mutex);
2783         iwl3945_alive_start(priv);
2784         mutex_unlock(&priv->mutex);
2785 }
2786
2787 /*
2788  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2789  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2790  * *is* readable even when device has been SW_RESET into low power mode
2791  * (e.g. during RF KILL).
2792  */
2793 static void iwl3945_rfkill_poll(struct work_struct *data)
2794 {
2795         struct iwl_priv *priv =
2796             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2797         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2798         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2799                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2800
2801         if (new_rfkill != old_rfkill) {
2802                 if (new_rfkill)
2803                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2804                 else
2805                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2806
2807                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2808
2809                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2810                                 new_rfkill ? "disable radio" : "enable radio");
2811         }
2812
2813         /* Keep this running, even if radio now enabled.  This will be
2814          * cancelled in mac_start() if system decides to start again */
2815         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2816                            round_jiffies_relative(2 * HZ));
2817
2818 }
2819
2820 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2821 {
2822         struct iwl_host_cmd cmd = {
2823                 .id = REPLY_SCAN_CMD,
2824                 .len = sizeof(struct iwl3945_scan_cmd),
2825                 .flags = CMD_SIZE_HUGE,
2826         };
2827         struct iwl3945_scan_cmd *scan;
2828         struct ieee80211_conf *conf = NULL;
2829         u8 n_probes = 0;
2830         enum ieee80211_band band;
2831         bool is_active = false;
2832
2833         conf = ieee80211_get_hw_conf(priv->hw);
2834
2835         cancel_delayed_work(&priv->scan_check);
2836
2837         if (!iwl_is_ready(priv)) {
2838                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2839                 goto done;
2840         }
2841
2842         /* Make sure the scan wasn't canceled before this queued work
2843          * was given the chance to run... */
2844         if (!test_bit(STATUS_SCANNING, &priv->status))
2845                 goto done;
2846
2847         /* This should never be called or scheduled if there is currently
2848          * a scan active in the hardware. */
2849         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2850                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2851                                 "Ignoring second request.\n");
2852                 goto done;
2853         }
2854
2855         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2856                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2857                 goto done;
2858         }
2859
2860         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2861                 IWL_DEBUG_HC(priv,
2862                         "Scan request while abort pending. Queuing.\n");
2863                 goto done;
2864         }
2865
2866         if (iwl_is_rfkill(priv)) {
2867                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2868                 goto done;
2869         }
2870
2871         if (!test_bit(STATUS_READY, &priv->status)) {
2872                 IWL_DEBUG_HC(priv,
2873                         "Scan request while uninitialized. Queuing.\n");
2874                 goto done;
2875         }
2876
2877         if (!priv->scan_cmd) {
2878                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2879                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2880                 if (!priv->scan_cmd) {
2881                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2882                         goto done;
2883                 }
2884         }
2885         scan = priv->scan_cmd;
2886         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2887
2888         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2889         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2890
2891         if (iwl_is_associated(priv)) {
2892                 u16 interval = 0;
2893                 u32 extra;
2894                 u32 suspend_time = 100;
2895                 u32 scan_suspend_time = 100;
2896                 unsigned long flags;
2897
2898                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2899
2900                 spin_lock_irqsave(&priv->lock, flags);
2901                 interval = vif ? vif->bss_conf.beacon_int : 0;
2902                 spin_unlock_irqrestore(&priv->lock, flags);
2903
2904                 scan->suspend_time = 0;
2905                 scan->max_out_time = cpu_to_le32(200 * 1024);
2906                 if (!interval)
2907                         interval = suspend_time;
2908                 /*
2909                  * suspend time format:
2910                  *  0-19: beacon interval in usec (time before exec.)
2911                  * 20-23: 0
2912                  * 24-31: number of beacons (suspend between channels)
2913                  */
2914
2915                 extra = (suspend_time / interval) << 24;
2916                 scan_suspend_time = 0xFF0FFFFF &
2917                     (extra | ((suspend_time % interval) * 1024));
2918
2919                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2920                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2921                                scan_suspend_time, interval);
2922         }
2923
2924         if (priv->is_internal_short_scan) {
2925                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2926         } else if (priv->scan_request->n_ssids) {
2927                 int i, p = 0;
2928                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2929                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2930                         /* always does wildcard anyway */
2931                         if (!priv->scan_request->ssids[i].ssid_len)
2932                                 continue;
2933                         scan->direct_scan[p].id = WLAN_EID_SSID;
2934                         scan->direct_scan[p].len =
2935                                 priv->scan_request->ssids[i].ssid_len;
2936                         memcpy(scan->direct_scan[p].ssid,
2937                                priv->scan_request->ssids[i].ssid,
2938                                priv->scan_request->ssids[i].ssid_len);
2939                         n_probes++;
2940                         p++;
2941                 }
2942                 is_active = true;
2943         } else
2944                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2945
2946         /* We don't build a direct scan probe request; the uCode will do
2947          * that based on the direct_mask added to each channel entry */
2948         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2949         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2950         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2951
2952         /* flags + rate selection */
2953
2954         switch (priv->scan_band) {
2955         case IEEE80211_BAND_2GHZ:
2956                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2957                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2958                 scan->good_CRC_th = 0;
2959                 band = IEEE80211_BAND_2GHZ;
2960                 break;
2961         case IEEE80211_BAND_5GHZ:
2962                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2963                 /*
2964                  * If active scaning is requested but a certain channel
2965                  * is marked passive, we can do active scanning if we
2966                  * detect transmissions.
2967                  */
2968                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2969                                                 IWL_GOOD_CRC_TH_DISABLED;
2970                 band = IEEE80211_BAND_5GHZ;
2971                 break;
2972         default:
2973                 IWL_WARN(priv, "Invalid scan band\n");
2974                 goto done;
2975         }
2976
2977         if (!priv->is_internal_short_scan) {
2978                 scan->tx_cmd.len = cpu_to_le16(
2979                         iwl_fill_probe_req(priv,
2980                                 (struct ieee80211_mgmt *)scan->data,
2981                                 priv->scan_request->ie,
2982                                 priv->scan_request->ie_len,
2983                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2984         } else {
2985                 scan->tx_cmd.len = cpu_to_le16(
2986                         iwl_fill_probe_req(priv,
2987                                 (struct ieee80211_mgmt *)scan->data,
2988                                 NULL, 0,
2989                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2990         }
2991         /* select Rx antennas */
2992         scan->flags |= iwl3945_get_antenna_flags(priv);
2993
2994         scan->channel_count =
2995                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2996                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2997
2998         if (scan->channel_count == 0) {
2999                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3000                 goto done;
3001         }
3002
3003         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3004             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3005         cmd.data = scan;
3006         scan->len = cpu_to_le16(cmd.len);
3007
3008         set_bit(STATUS_SCAN_HW, &priv->status);
3009         if (iwl_send_cmd_sync(priv, &cmd))
3010                 goto done;
3011
3012         queue_delayed_work(priv->workqueue, &priv->scan_check,
3013                            IWL_SCAN_CHECK_WATCHDOG);
3014
3015         return;
3016
3017  done:
3018         /* can not perform scan make sure we clear scanning
3019          * bits from status so next scan request can be performed.
3020          * if we dont clear scanning status bit here all next scan
3021          * will fail
3022         */
3023         clear_bit(STATUS_SCAN_HW, &priv->status);
3024         clear_bit(STATUS_SCANNING, &priv->status);
3025
3026         /* inform mac80211 scan aborted */
3027         queue_work(priv->workqueue, &priv->scan_completed);
3028 }
3029
3030 static void iwl3945_bg_restart(struct work_struct *data)
3031 {
3032         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3033
3034         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3035                 return;
3036
3037         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3038                 mutex_lock(&priv->mutex);
3039                 priv->vif = NULL;
3040                 priv->is_open = 0;
3041                 mutex_unlock(&priv->mutex);
3042                 iwl3945_down(priv);
3043                 ieee80211_restart_hw(priv->hw);
3044         } else {
3045                 iwl3945_down(priv);
3046
3047                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3048                         return;
3049
3050                 mutex_lock(&priv->mutex);
3051                 __iwl3945_up(priv);
3052                 mutex_unlock(&priv->mutex);
3053         }
3054 }
3055
3056 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3057 {
3058         struct iwl_priv *priv =
3059             container_of(data, struct iwl_priv, rx_replenish);
3060
3061         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3062                 return;
3063
3064         mutex_lock(&priv->mutex);
3065         iwl3945_rx_replenish(priv);
3066         mutex_unlock(&priv->mutex);
3067 }
3068
3069 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3070 {
3071         int rc = 0;
3072         struct ieee80211_conf *conf = NULL;
3073
3074         if (!vif || !priv->is_open)
3075                 return;
3076
3077         if (vif->type == NL80211_IFTYPE_AP) {
3078                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3079                 return;
3080         }
3081
3082         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3083                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3084
3085         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3086                 return;
3087
3088         iwl_scan_cancel_timeout(priv, 200);
3089
3090         conf = ieee80211_get_hw_conf(priv->hw);
3091
3092         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3093         iwlcore_commit_rxon(priv);
3094
3095         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3096         iwl_setup_rxon_timing(priv, vif);
3097         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3098                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3099         if (rc)
3100                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3101                             "Attempting to continue.\n");
3102
3103         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3104
3105         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3106
3107         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3108                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3109
3110         if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3111                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3112         else
3113                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3114
3115         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3116                 if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3117                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3118                 else
3119                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3120
3121                 if (vif->type == NL80211_IFTYPE_ADHOC)
3122                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3123         }
3124
3125         iwlcore_commit_rxon(priv);
3126
3127         switch (vif->type) {
3128         case NL80211_IFTYPE_STATION:
3129                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3130                 break;
3131         case NL80211_IFTYPE_ADHOC:
3132                 iwl3945_send_beacon_cmd(priv);
3133                 break;
3134         default:
3135                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3136                         __func__, vif->type);
3137                 break;
3138         }
3139 }
3140
3141 /*****************************************************************************
3142  *
3143  * mac80211 entry point functions
3144  *
3145  *****************************************************************************/
3146
3147 #define UCODE_READY_TIMEOUT     (2 * HZ)
3148
3149 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3150 {
3151         struct iwl_priv *priv = hw->priv;
3152         int ret;
3153
3154         IWL_DEBUG_MAC80211(priv, "enter\n");
3155
3156         /* we should be verifying the device is ready to be opened */
3157         mutex_lock(&priv->mutex);
3158
3159         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3160          * ucode filename and max sizes are card-specific. */
3161
3162         if (!priv->ucode_code.len) {
3163                 ret = iwl3945_read_ucode(priv);
3164                 if (ret) {
3165                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3166                         mutex_unlock(&priv->mutex);
3167                         goto out_release_irq;
3168                 }
3169         }
3170
3171         ret = __iwl3945_up(priv);
3172
3173         mutex_unlock(&priv->mutex);
3174
3175         if (ret)
3176                 goto out_release_irq;
3177
3178         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3179
3180         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3181          * mac80211 will not be run successfully. */
3182         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3183                         test_bit(STATUS_READY, &priv->status),
3184                         UCODE_READY_TIMEOUT);
3185         if (!ret) {
3186                 if (!test_bit(STATUS_READY, &priv->status)) {
3187                         IWL_ERR(priv,
3188                                 "Wait for START_ALIVE timeout after %dms.\n",
3189                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3190                         ret = -ETIMEDOUT;
3191                         goto out_release_irq;
3192                 }
3193         }
3194
3195         /* ucode is running and will send rfkill notifications,
3196          * no need to poll the killswitch state anymore */
3197         cancel_delayed_work(&priv->_3945.rfkill_poll);
3198
3199         iwl_led_start(priv);
3200
3201         priv->is_open = 1;
3202         IWL_DEBUG_MAC80211(priv, "leave\n");
3203         return 0;
3204
3205 out_release_irq:
3206         priv->is_open = 0;
3207         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3208         return ret;
3209 }
3210
3211 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3212 {
3213         struct iwl_priv *priv = hw->priv;
3214
3215         IWL_DEBUG_MAC80211(priv, "enter\n");
3216
3217         if (!priv->is_open) {
3218                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3219                 return;
3220         }
3221
3222         priv->is_open = 0;
3223
3224         if (iwl_is_ready_rf(priv)) {
3225                 /* stop mac, cancel any scan request and clear
3226                  * RXON_FILTER_ASSOC_MSK BIT
3227                  */
3228                 mutex_lock(&priv->mutex);
3229                 iwl_scan_cancel_timeout(priv, 100);
3230                 mutex_unlock(&priv->mutex);
3231         }
3232
3233         iwl3945_down(priv);
3234
3235         flush_workqueue(priv->workqueue);
3236
3237         /* start polling the killswitch state again */
3238         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3239                            round_jiffies_relative(2 * HZ));
3240
3241         IWL_DEBUG_MAC80211(priv, "leave\n");
3242 }
3243
3244 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3245 {
3246         struct iwl_priv *priv = hw->priv;
3247
3248         IWL_DEBUG_MAC80211(priv, "enter\n");
3249
3250         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3251                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3252
3253         if (iwl3945_tx_skb(priv, skb))
3254                 dev_kfree_skb_any(skb);
3255
3256         IWL_DEBUG_MAC80211(priv, "leave\n");
3257         return NETDEV_TX_OK;
3258 }
3259
3260 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3261 {
3262         int rc = 0;
3263
3264         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3265                 return;
3266
3267         /* The following should be done only at AP bring up */
3268         if (!(iwl_is_associated(priv))) {
3269
3270                 /* RXON - unassoc (to set timing command) */
3271                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3272                 iwlcore_commit_rxon(priv);
3273
3274                 /* RXON Timing */
3275                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3276                 iwl_setup_rxon_timing(priv, vif);
3277                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3278                                       sizeof(priv->rxon_timing),
3279                                       &priv->rxon_timing);
3280                 if (rc)
3281                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3282                                         "Attempting to continue.\n");
3283
3284                 priv->staging_rxon.assoc_id = 0;
3285
3286                 if (vif->bss_conf.assoc_capability &
3287                                         WLAN_CAPABILITY_SHORT_PREAMBLE)
3288                         priv->staging_rxon.flags |=
3289                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3290                 else
3291                         priv->staging_rxon.flags &=
3292                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3293
3294                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3295                         if (vif->bss_conf.assoc_capability &
3296                                         WLAN_CAPABILITY_SHORT_SLOT_TIME)
3297                                 priv->staging_rxon.flags |=
3298                                         RXON_FLG_SHORT_SLOT_MSK;
3299                         else
3300                                 priv->staging_rxon.flags &=
3301                                         ~RXON_FLG_SHORT_SLOT_MSK;
3302
3303                         if (vif->type == NL80211_IFTYPE_ADHOC)
3304                                 priv->staging_rxon.flags &=
3305                                         ~RXON_FLG_SHORT_SLOT_MSK;
3306                 }
3307                 /* restore RXON assoc */
3308                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3309                 iwlcore_commit_rxon(priv);
3310         }
3311         iwl3945_send_beacon_cmd(priv);
3312
3313         /* FIXME - we need to add code here to detect a totally new
3314          * configuration, reset the AP, unassoc, rxon timing, assoc,
3315          * clear sta table, add BCAST sta... */
3316 }
3317
3318 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3319                                struct ieee80211_vif *vif,
3320                                struct ieee80211_sta *sta,
3321                                struct ieee80211_key_conf *key)
3322 {
3323         struct iwl_priv *priv = hw->priv;
3324         int ret = 0;
3325         u8 sta_id = IWL_INVALID_STATION;
3326         u8 static_key;
3327
3328         IWL_DEBUG_MAC80211(priv, "enter\n");
3329
3330         if (iwl3945_mod_params.sw_crypto) {
3331                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3332                 return -EOPNOTSUPP;
3333         }
3334
3335         static_key = !iwl_is_associated(priv);
3336
3337         if (!static_key) {
3338                 if (!sta) {
3339                         sta_id = priv->hw_params.bcast_sta_id;
3340                 } else {
3341                         sta_id = iwl_sta_id(sta);
3342                         if (sta_id == IWL_INVALID_STATION) {
3343                                 IWL_DEBUG_MAC80211(priv,
3344                                                    "leave - %pM not in station map.\n",
3345                                                    sta->addr);
3346                                 return -EINVAL;
3347                         }
3348                 }
3349         }
3350
3351         mutex_lock(&priv->mutex);
3352         iwl_scan_cancel_timeout(priv, 100);
3353
3354         switch (cmd) {
3355         case SET_KEY:
3356                 if (static_key)
3357                         ret = iwl3945_set_static_key(priv, key);
3358                 else
3359                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3360                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3361                 break;
3362         case DISABLE_KEY:
3363                 if (static_key)
3364                         ret = iwl3945_remove_static_key(priv);
3365                 else
3366                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3367                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3368                 break;
3369         default:
3370                 ret = -EINVAL;
3371         }
3372
3373         mutex_unlock(&priv->mutex);
3374         IWL_DEBUG_MAC80211(priv, "leave\n");
3375
3376         return ret;
3377 }
3378
3379 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3380                                struct ieee80211_vif *vif,
3381                                struct ieee80211_sta *sta)
3382 {
3383         struct iwl_priv *priv = hw->priv;
3384         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3385         int ret;
3386         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3387         u8 sta_id;
3388
3389         sta_priv->common.sta_id = IWL_INVALID_STATION;
3390
3391         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3392                         sta->addr);
3393
3394         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3395                                      &sta_id);
3396         if (ret) {
3397                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3398                         sta->addr, ret);
3399                 /* Should we return success if return code is EEXIST ? */
3400                 return ret;
3401         }
3402
3403         sta_priv->common.sta_id = sta_id;
3404
3405         /* Initialize rate scaling */
3406         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3407                        sta->addr);
3408         iwl3945_rs_rate_init(priv, sta, sta_id);
3409
3410         return 0;
3411 }
3412 /*****************************************************************************
3413  *
3414  * sysfs attributes
3415  *
3416  *****************************************************************************/
3417
3418 #ifdef CONFIG_IWLWIFI_DEBUG
3419
3420 /*
3421  * The following adds a new attribute to the sysfs representation
3422  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3423  * used for controlling the debug level.
3424  *
3425  * See the level definitions in iwl for details.
3426  *
3427  * The debug_level being managed using sysfs below is a per device debug
3428  * level that is used instead of the global debug level if it (the per
3429  * device debug level) is set.
3430  */
3431 static ssize_t show_debug_level(struct device *d,
3432                                 struct device_attribute *attr, char *buf)
3433 {
3434         struct iwl_priv *priv = dev_get_drvdata(d);
3435         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3436 }
3437 static ssize_t store_debug_level(struct device *d,
3438                                 struct device_attribute *attr,
3439                                  const char *buf, size_t count)
3440 {
3441         struct iwl_priv *priv = dev_get_drvdata(d);
3442         unsigned long val;
3443         int ret;
3444
3445         ret = strict_strtoul(buf, 0, &val);
3446         if (ret)
3447                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3448         else {
3449                 priv->debug_level = val;
3450                 if (iwl_alloc_traffic_mem(priv))
3451                         IWL_ERR(priv,
3452                                 "Not enough memory to generate traffic log\n");
3453         }
3454         return strnlen(buf, count);
3455 }
3456
3457 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3458                         show_debug_level, store_debug_level);
3459
3460 #endif /* CONFIG_IWLWIFI_DEBUG */
3461
3462 static ssize_t show_temperature(struct device *d,
3463                                 struct device_attribute *attr, char *buf)
3464 {
3465         struct iwl_priv *priv = dev_get_drvdata(d);
3466
3467         if (!iwl_is_alive(priv))
3468                 return -EAGAIN;
3469
3470         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3471 }
3472
3473 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3474
3475 static ssize_t show_tx_power(struct device *d,
3476                              struct device_attribute *attr, char *buf)
3477 {
3478         struct iwl_priv *priv = dev_get_drvdata(d);
3479         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3480 }
3481
3482 static ssize_t store_tx_power(struct device *d,
3483                               struct device_attribute *attr,
3484                               const char *buf, size_t count)
3485 {
3486         struct iwl_priv *priv = dev_get_drvdata(d);
3487         char *p = (char *)buf;
3488         u32 val;
3489
3490         val = simple_strtoul(p, &p, 10);
3491         if (p == buf)
3492                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3493         else
3494                 iwl3945_hw_reg_set_txpower(priv, val);
3495
3496         return count;
3497 }
3498
3499 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3500
3501 static ssize_t show_flags(struct device *d,
3502                           struct device_attribute *attr, char *buf)
3503 {
3504         struct iwl_priv *priv = dev_get_drvdata(d);
3505
3506         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3507 }
3508
3509 static ssize_t store_flags(struct device *d,
3510                            struct device_attribute *attr,
3511                            const char *buf, size_t count)
3512 {
3513         struct iwl_priv *priv = dev_get_drvdata(d);
3514         u32 flags = simple_strtoul(buf, NULL, 0);
3515
3516         mutex_lock(&priv->mutex);
3517         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3518                 /* Cancel any currently running scans... */
3519                 if (iwl_scan_cancel_timeout(priv, 100))
3520                         IWL_WARN(priv, "Could not cancel scan.\n");
3521                 else {
3522                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3523                                        flags);
3524                         priv->staging_rxon.flags = cpu_to_le32(flags);
3525                         iwlcore_commit_rxon(priv);
3526                 }
3527         }
3528         mutex_unlock(&priv->mutex);
3529
3530         return count;
3531 }
3532
3533 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3534
3535 static ssize_t show_filter_flags(struct device *d,
3536                                  struct device_attribute *attr, char *buf)
3537 {
3538         struct iwl_priv *priv = dev_get_drvdata(d);
3539
3540         return sprintf(buf, "0x%04X\n",
3541                 le32_to_cpu(priv->active_rxon.filter_flags));
3542 }
3543
3544 static ssize_t store_filter_flags(struct device *d,
3545                                   struct device_attribute *attr,
3546                                   const char *buf, size_t count)
3547 {
3548         struct iwl_priv *priv = dev_get_drvdata(d);
3549         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3550
3551         mutex_lock(&priv->mutex);
3552         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3553                 /* Cancel any currently running scans... */
3554                 if (iwl_scan_cancel_timeout(priv, 100))
3555                         IWL_WARN(priv, "Could not cancel scan.\n");
3556                 else {
3557                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3558                                        "0x%04X\n", filter_flags);
3559                         priv->staging_rxon.filter_flags =
3560                                 cpu_to_le32(filter_flags);
3561                         iwlcore_commit_rxon(priv);
3562                 }
3563         }
3564         mutex_unlock(&priv->mutex);
3565
3566         return count;
3567 }
3568
3569 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3570                    store_filter_flags);
3571
3572 static ssize_t show_measurement(struct device *d,
3573                                 struct device_attribute *attr, char *buf)
3574 {
3575         struct iwl_priv *priv = dev_get_drvdata(d);
3576         struct iwl_spectrum_notification measure_report;
3577         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3578         u8 *data = (u8 *)&measure_report;
3579         unsigned long flags;
3580
3581         spin_lock_irqsave(&priv->lock, flags);
3582         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3583                 spin_unlock_irqrestore(&priv->lock, flags);
3584                 return 0;
3585         }
3586         memcpy(&measure_report, &priv->measure_report, size);
3587         priv->measurement_status = 0;
3588         spin_unlock_irqrestore(&priv->lock, flags);
3589
3590         while (size && (PAGE_SIZE - len)) {
3591                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3592                                    PAGE_SIZE - len, 1);
3593                 len = strlen(buf);
3594                 if (PAGE_SIZE - len)
3595                         buf[len++] = '\n';
3596
3597                 ofs += 16;
3598                 size -= min(size, 16U);
3599         }
3600
3601         return len;
3602 }
3603
3604 static ssize_t store_measurement(struct device *d,
3605                                  struct device_attribute *attr,
3606                                  const char *buf, size_t count)
3607 {
3608         struct iwl_priv *priv = dev_get_drvdata(d);
3609         struct ieee80211_measurement_params params = {
3610                 .channel = le16_to_cpu(priv->active_rxon.channel),
3611                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3612                 .duration = cpu_to_le16(1),
3613         };
3614         u8 type = IWL_MEASURE_BASIC;
3615         u8 buffer[32];
3616         u8 channel;
3617
3618         if (count) {
3619                 char *p = buffer;
3620                 strncpy(buffer, buf, min(sizeof(buffer), count));
3621                 channel = simple_strtoul(p, NULL, 0);
3622                 if (channel)
3623                         params.channel = channel;
3624
3625                 p = buffer;
3626                 while (*p && *p != ' ')
3627                         p++;
3628                 if (*p)
3629                         type = simple_strtoul(p + 1, NULL, 0);
3630         }
3631
3632         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3633                        "channel %d (for '%s')\n", type, params.channel, buf);
3634         iwl3945_get_measurement(priv, &params, type);
3635
3636         return count;
3637 }
3638
3639 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3640                    show_measurement, store_measurement);
3641
3642 static ssize_t store_retry_rate(struct device *d,
3643                                 struct device_attribute *attr,
3644                                 const char *buf, size_t count)
3645 {
3646         struct iwl_priv *priv = dev_get_drvdata(d);
3647
3648         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3649         if (priv->retry_rate <= 0)
3650                 priv->retry_rate = 1;
3651
3652         return count;
3653 }
3654
3655 static ssize_t show_retry_rate(struct device *d,
3656                                struct device_attribute *attr, char *buf)
3657 {
3658         struct iwl_priv *priv = dev_get_drvdata(d);
3659         return sprintf(buf, "%d", priv->retry_rate);
3660 }
3661
3662 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3663                    store_retry_rate);
3664
3665
3666 static ssize_t show_channels(struct device *d,
3667                              struct device_attribute *attr, char *buf)
3668 {
3669         /* all this shit doesn't belong into sysfs anyway */
3670         return 0;
3671 }
3672
3673 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3674
3675 static ssize_t show_antenna(struct device *d,
3676                             struct device_attribute *attr, char *buf)
3677 {
3678         struct iwl_priv *priv = dev_get_drvdata(d);
3679
3680         if (!iwl_is_alive(priv))
3681                 return -EAGAIN;
3682
3683         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3684 }
3685
3686 static ssize_t store_antenna(struct device *d,
3687                              struct device_attribute *attr,
3688                              const char *buf, size_t count)
3689 {
3690         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3691         int ant;
3692
3693         if (count == 0)
3694                 return 0;
3695
3696         if (sscanf(buf, "%1i", &ant) != 1) {
3697                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3698                 return count;
3699         }
3700
3701         if ((ant >= 0) && (ant <= 2)) {
3702                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3703                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3704         } else
3705                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3706
3707
3708         return count;
3709 }
3710
3711 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3712
3713 static ssize_t show_status(struct device *d,
3714                            struct device_attribute *attr, char *buf)
3715 {
3716         struct iwl_priv *priv = dev_get_drvdata(d);
3717         if (!iwl_is_alive(priv))
3718                 return -EAGAIN;
3719         return sprintf(buf, "0x%08x\n", (int)priv->status);
3720 }
3721
3722 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3723
3724 static ssize_t dump_error_log(struct device *d,
3725                               struct device_attribute *attr,
3726                               const char *buf, size_t count)
3727 {
3728         struct iwl_priv *priv = dev_get_drvdata(d);
3729         char *p = (char *)buf;
3730
3731         if (p[0] == '1')
3732                 iwl3945_dump_nic_error_log(priv);
3733
3734         return strnlen(buf, count);
3735 }
3736
3737 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3738
3739 /*****************************************************************************
3740  *
3741  * driver setup and tear down
3742  *
3743  *****************************************************************************/
3744
3745 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3746 {
3747         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3748
3749         init_waitqueue_head(&priv->wait_command_queue);
3750
3751         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3752         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3753         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3754         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3755         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3756         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3757         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3758         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3759         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3760         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3761
3762         iwl3945_hw_setup_deferred_work(priv);
3763
3764         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3765                 init_timer(&priv->monitor_recover);
3766                 priv->monitor_recover.data = (unsigned long)priv;
3767                 priv->monitor_recover.function =
3768                         priv->cfg->ops->lib->recover_from_tx_stall;
3769         }
3770
3771         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3772                      iwl3945_irq_tasklet, (unsigned long)priv);
3773 }
3774
3775 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3776 {
3777         iwl3945_hw_cancel_deferred_work(priv);
3778
3779         cancel_delayed_work_sync(&priv->init_alive_start);
3780         cancel_delayed_work(&priv->scan_check);
3781         cancel_delayed_work(&priv->alive_start);
3782         cancel_work_sync(&priv->start_internal_scan);
3783         cancel_work_sync(&priv->beacon_update);
3784         if (priv->cfg->ops->lib->recover_from_tx_stall)
3785                 del_timer_sync(&priv->monitor_recover);
3786 }
3787
3788 static struct attribute *iwl3945_sysfs_entries[] = {
3789         &dev_attr_antenna.attr,
3790         &dev_attr_channels.attr,
3791         &dev_attr_dump_errors.attr,
3792         &dev_attr_flags.attr,
3793         &dev_attr_filter_flags.attr,
3794         &dev_attr_measurement.attr,
3795         &dev_attr_retry_rate.attr,
3796         &dev_attr_status.attr,
3797         &dev_attr_temperature.attr,
3798         &dev_attr_tx_power.attr,
3799 #ifdef CONFIG_IWLWIFI_DEBUG
3800         &dev_attr_debug_level.attr,
3801 #endif
3802         NULL
3803 };
3804
3805 static struct attribute_group iwl3945_attribute_group = {
3806         .name = NULL,           /* put in device directory */
3807         .attrs = iwl3945_sysfs_entries,
3808 };
3809
3810 static struct ieee80211_ops iwl3945_hw_ops = {
3811         .tx = iwl3945_mac_tx,
3812         .start = iwl3945_mac_start,
3813         .stop = iwl3945_mac_stop,
3814         .add_interface = iwl_mac_add_interface,
3815         .remove_interface = iwl_mac_remove_interface,
3816         .config = iwl_mac_config,
3817         .configure_filter = iwl_configure_filter,
3818         .set_key = iwl3945_mac_set_key,
3819         .conf_tx = iwl_mac_conf_tx,
3820         .reset_tsf = iwl_mac_reset_tsf,
3821         .bss_info_changed = iwl_bss_info_changed,
3822         .hw_scan = iwl_mac_hw_scan,
3823         .sta_add = iwl3945_mac_sta_add,
3824         .sta_remove = iwl_mac_sta_remove,
3825 };
3826
3827 static int iwl3945_init_drv(struct iwl_priv *priv)
3828 {
3829         int ret;
3830         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3831
3832         priv->retry_rate = 1;
3833         priv->ibss_beacon = NULL;
3834
3835         spin_lock_init(&priv->sta_lock);
3836         spin_lock_init(&priv->hcmd_lock);
3837
3838         INIT_LIST_HEAD(&priv->free_frames);
3839
3840         mutex_init(&priv->mutex);
3841         mutex_init(&priv->sync_cmd_mutex);
3842
3843         priv->ieee_channels = NULL;
3844         priv->ieee_rates = NULL;
3845         priv->band = IEEE80211_BAND_2GHZ;
3846
3847         priv->iw_mode = NL80211_IFTYPE_STATION;
3848         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3849
3850         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3851
3852         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3853                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3854                          eeprom->version);
3855                 ret = -EINVAL;
3856                 goto err;
3857         }
3858         ret = iwl_init_channel_map(priv);
3859         if (ret) {
3860                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3861                 goto err;
3862         }
3863
3864         /* Set up txpower settings in driver for all channels */
3865         if (iwl3945_txpower_set_from_eeprom(priv)) {
3866                 ret = -EIO;
3867                 goto err_free_channel_map;
3868         }
3869
3870         ret = iwlcore_init_geos(priv);
3871         if (ret) {
3872                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3873                 goto err_free_channel_map;
3874         }
3875         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3876
3877         return 0;
3878
3879 err_free_channel_map:
3880         iwl_free_channel_map(priv);
3881 err:
3882         return ret;
3883 }
3884
3885 #define IWL3945_MAX_PROBE_REQUEST       200
3886
3887 static int iwl3945_setup_mac(struct iwl_priv *priv)
3888 {
3889         int ret;
3890         struct ieee80211_hw *hw = priv->hw;
3891
3892         hw->rate_control_algorithm = "iwl-3945-rs";
3893         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3894         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3895
3896         /* Tell mac80211 our characteristics */
3897         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3898                     IEEE80211_HW_SPECTRUM_MGMT;
3899
3900         if (!priv->cfg->broken_powersave)
3901                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3902                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3903
3904         hw->wiphy->interface_modes =
3905                 BIT(NL80211_IFTYPE_STATION) |
3906                 BIT(NL80211_IFTYPE_ADHOC);
3907
3908         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3909                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3910
3911         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3912         /* we create the 802.11 header and a zero-length SSID element */
3913         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3914
3915         /* Default value; 4 EDCA QOS priorities */
3916         hw->queues = 4;
3917
3918         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3919                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3920                         &priv->bands[IEEE80211_BAND_2GHZ];
3921
3922         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3923                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3924                         &priv->bands[IEEE80211_BAND_5GHZ];
3925
3926         ret = ieee80211_register_hw(priv->hw);
3927         if (ret) {
3928                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3929                 return ret;
3930         }
3931         priv->mac80211_registered = 1;
3932
3933         return 0;
3934 }
3935
3936 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3937 {
3938         int err = 0;
3939         struct iwl_priv *priv;
3940         struct ieee80211_hw *hw;
3941         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3942         struct iwl3945_eeprom *eeprom;
3943         unsigned long flags;
3944
3945         /***********************
3946          * 1. Allocating HW data
3947          * ********************/
3948
3949         /* mac80211 allocates memory for this device instance, including
3950          *   space for this driver's private structure */
3951         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3952         if (hw == NULL) {
3953                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3954                 err = -ENOMEM;
3955                 goto out;
3956         }
3957         priv = hw->priv;
3958         SET_IEEE80211_DEV(hw, &pdev->dev);
3959
3960         /*
3961          * Disabling hardware scan means that mac80211 will perform scans
3962          * "the hard way", rather than using device's scan.
3963          */
3964         if (iwl3945_mod_params.disable_hw_scan) {
3965                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3966                 iwl3945_hw_ops.hw_scan = NULL;
3967         }
3968
3969
3970         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3971         priv->cfg = cfg;
3972         priv->pci_dev = pdev;
3973         priv->inta_mask = CSR_INI_SET_MASK;
3974
3975 #ifdef CONFIG_IWLWIFI_DEBUG
3976         atomic_set(&priv->restrict_refcnt, 0);
3977 #endif
3978         if (iwl_alloc_traffic_mem(priv))
3979                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3980
3981         /***************************
3982          * 2. Initializing PCI bus
3983          * *************************/
3984         if (pci_enable_device(pdev)) {
3985                 err = -ENODEV;
3986                 goto out_ieee80211_free_hw;
3987         }
3988
3989         pci_set_master(pdev);
3990
3991         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3992         if (!err)
3993                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3994         if (err) {
3995                 IWL_WARN(priv, "No suitable DMA available.\n");
3996                 goto out_pci_disable_device;
3997         }
3998
3999         pci_set_drvdata(pdev, priv);
4000         err = pci_request_regions(pdev, DRV_NAME);
4001         if (err)
4002                 goto out_pci_disable_device;
4003
4004         /***********************
4005          * 3. Read REV Register
4006          * ********************/
4007         priv->hw_base = pci_iomap(pdev, 0, 0);
4008         if (!priv->hw_base) {
4009                 err = -ENODEV;
4010                 goto out_pci_release_regions;
4011         }
4012
4013         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4014                         (unsigned long long) pci_resource_len(pdev, 0));
4015         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4016
4017         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4018          * PCI Tx retries from interfering with C3 CPU state */
4019         pci_write_config_byte(pdev, 0x41, 0x00);
4020
4021         /* these spin locks will be used in apm_ops.init and EEPROM access
4022          * we should init now
4023          */
4024         spin_lock_init(&priv->reg_lock);
4025         spin_lock_init(&priv->lock);
4026
4027         /*
4028          * stop and reset the on-board processor just in case it is in a
4029          * strange state ... like being left stranded by a primary kernel
4030          * and this is now the kdump kernel trying to start up
4031          */
4032         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4033
4034         /***********************
4035          * 4. Read EEPROM
4036          * ********************/
4037
4038         /* Read the EEPROM */
4039         err = iwl_eeprom_init(priv);
4040         if (err) {
4041                 IWL_ERR(priv, "Unable to init EEPROM\n");
4042                 goto out_iounmap;
4043         }
4044         /* MAC Address location in EEPROM same for 3945/4965 */
4045         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4046         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4047         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4048         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4049
4050         /***********************
4051          * 5. Setup HW Constants
4052          * ********************/
4053         /* Device-specific setup */
4054         if (iwl3945_hw_set_hw_params(priv)) {
4055                 IWL_ERR(priv, "failed to set hw settings\n");
4056                 goto out_eeprom_free;
4057         }
4058
4059         /***********************
4060          * 6. Setup priv
4061          * ********************/
4062
4063         err = iwl3945_init_drv(priv);
4064         if (err) {
4065                 IWL_ERR(priv, "initializing driver failed\n");
4066                 goto out_unset_hw_params;
4067         }
4068
4069         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4070                 priv->cfg->name);
4071
4072         /***********************
4073          * 7. Setup Services
4074          * ********************/
4075
4076         spin_lock_irqsave(&priv->lock, flags);
4077         iwl_disable_interrupts(priv);
4078         spin_unlock_irqrestore(&priv->lock, flags);
4079
4080         pci_enable_msi(priv->pci_dev);
4081
4082         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4083                           IRQF_SHARED, DRV_NAME, priv);
4084         if (err) {
4085                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4086                 goto out_disable_msi;
4087         }
4088
4089         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4090         if (err) {
4091                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4092                 goto out_release_irq;
4093         }
4094
4095         iwl_set_rxon_channel(priv,
4096                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4097         iwl3945_setup_deferred_work(priv);
4098         iwl3945_setup_rx_handlers(priv);
4099         iwl_power_initialize(priv);
4100
4101         /*********************************
4102          * 8. Setup and Register mac80211
4103          * *******************************/
4104
4105         iwl_enable_interrupts(priv);
4106
4107         err = iwl3945_setup_mac(priv);
4108         if (err)
4109                 goto  out_remove_sysfs;
4110
4111         err = iwl_dbgfs_register(priv, DRV_NAME);
4112         if (err)
4113                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4114
4115         /* Start monitoring the killswitch */
4116         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4117                            2 * HZ);
4118
4119         return 0;
4120
4121  out_remove_sysfs:
4122         destroy_workqueue(priv->workqueue);
4123         priv->workqueue = NULL;
4124         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4125  out_release_irq:
4126         free_irq(priv->pci_dev->irq, priv);
4127  out_disable_msi:
4128         pci_disable_msi(priv->pci_dev);
4129         iwlcore_free_geos(priv);
4130         iwl_free_channel_map(priv);
4131  out_unset_hw_params:
4132         iwl3945_unset_hw_params(priv);
4133  out_eeprom_free:
4134         iwl_eeprom_free(priv);
4135  out_iounmap:
4136         pci_iounmap(pdev, priv->hw_base);
4137  out_pci_release_regions:
4138         pci_release_regions(pdev);
4139  out_pci_disable_device:
4140         pci_set_drvdata(pdev, NULL);
4141         pci_disable_device(pdev);
4142  out_ieee80211_free_hw:
4143         iwl_free_traffic_mem(priv);
4144         ieee80211_free_hw(priv->hw);
4145  out:
4146         return err;
4147 }
4148
4149 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4150 {
4151         struct iwl_priv *priv = pci_get_drvdata(pdev);
4152         unsigned long flags;
4153
4154         if (!priv)
4155                 return;
4156
4157         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4158
4159         iwl_dbgfs_unregister(priv);
4160
4161         set_bit(STATUS_EXIT_PENDING, &priv->status);
4162
4163         if (priv->mac80211_registered) {
4164                 ieee80211_unregister_hw(priv->hw);
4165                 priv->mac80211_registered = 0;
4166         } else {
4167                 iwl3945_down(priv);
4168         }
4169
4170         /*
4171          * Make sure device is reset to low power before unloading driver.
4172          * This may be redundant with iwl_down(), but there are paths to
4173          * run iwl_down() without calling apm_ops.stop(), and there are
4174          * paths to avoid running iwl_down() at all before leaving driver.
4175          * This (inexpensive) call *makes sure* device is reset.
4176          */
4177         priv->cfg->ops->lib->apm_ops.stop(priv);
4178
4179         /* make sure we flush any pending irq or
4180          * tasklet for the driver
4181          */
4182         spin_lock_irqsave(&priv->lock, flags);
4183         iwl_disable_interrupts(priv);
4184         spin_unlock_irqrestore(&priv->lock, flags);
4185
4186         iwl_synchronize_irq(priv);
4187
4188         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4189
4190         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4191
4192         iwl3945_dealloc_ucode_pci(priv);
4193
4194         if (priv->rxq.bd)
4195                 iwl3945_rx_queue_free(priv, &priv->rxq);
4196         iwl3945_hw_txq_ctx_free(priv);
4197
4198         iwl3945_unset_hw_params(priv);
4199
4200         /*netif_stop_queue(dev); */
4201         flush_workqueue(priv->workqueue);
4202
4203         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4204          * priv->workqueue... so we can't take down the workqueue
4205          * until now... */
4206         destroy_workqueue(priv->workqueue);
4207         priv->workqueue = NULL;
4208         iwl_free_traffic_mem(priv);
4209
4210         free_irq(pdev->irq, priv);
4211         pci_disable_msi(pdev);
4212
4213         pci_iounmap(pdev, priv->hw_base);
4214         pci_release_regions(pdev);
4215         pci_disable_device(pdev);
4216         pci_set_drvdata(pdev, NULL);
4217
4218         iwl_free_channel_map(priv);
4219         iwlcore_free_geos(priv);
4220         kfree(priv->scan_cmd);
4221         if (priv->ibss_beacon)
4222                 dev_kfree_skb(priv->ibss_beacon);
4223
4224         ieee80211_free_hw(priv->hw);
4225 }
4226
4227
4228 /*****************************************************************************
4229  *
4230  * driver and module entry point
4231  *
4232  *****************************************************************************/
4233
4234 static struct pci_driver iwl3945_driver = {
4235         .name = DRV_NAME,
4236         .id_table = iwl3945_hw_card_ids,
4237         .probe = iwl3945_pci_probe,
4238         .remove = __devexit_p(iwl3945_pci_remove),
4239 #ifdef CONFIG_PM
4240         .suspend = iwl_pci_suspend,
4241         .resume = iwl_pci_resume,
4242 #endif
4243 };
4244
4245 static int __init iwl3945_init(void)
4246 {
4247
4248         int ret;
4249         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4250         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4251
4252         ret = iwl3945_rate_control_register();
4253         if (ret) {
4254                 printk(KERN_ERR DRV_NAME
4255                        "Unable to register rate control algorithm: %d\n", ret);
4256                 return ret;
4257         }
4258
4259         ret = pci_register_driver(&iwl3945_driver);
4260         if (ret) {
4261                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4262                 goto error_register;
4263         }
4264
4265         return ret;
4266
4267 error_register:
4268         iwl3945_rate_control_unregister();
4269         return ret;
4270 }
4271
4272 static void __exit iwl3945_exit(void)
4273 {
4274         pci_unregister_driver(&iwl3945_driver);
4275         iwl3945_rate_control_unregister();
4276 }
4277
4278 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4279
4280 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4281 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4282 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4283 MODULE_PARM_DESC(swcrypto,
4284                  "using software crypto (default 1 [software])\n");
4285 #ifdef CONFIG_IWLWIFI_DEBUG
4286 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4287 MODULE_PARM_DESC(debug, "debug output mask");
4288 #endif
4289 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4290                    int, S_IRUGO);
4291 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4292 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4293 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4294
4295 module_exit(iwl3945_exit);
4296 module_init(iwl3945_init);