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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/slab.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/sched.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/wireless.h>
  41 #include <linux/firmware.h>
  42 #include <linux/etherdevice.h>
  43 #include <linux/if_arp.h>
  44
  45 #include <net/ieee80211_radiotap.h>
  46 #include <net/mac80211.h>
  47
  48 #include <asm/div64.h>
  49
  50 #define DRV_NAME        "iwl3945"
  51
  52 #include "iwl-fh.h"
  53 #include "iwl-3945-fh.h"
  54 #include "iwl-commands.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-3945.h"
  57 #include "iwl-core.h"
  58 #include "iwl-helpers.h"
  59 #include "iwl-dev.h"
  60 #include "iwl-spectrum.h"
  61
  62 /*
  63  * module name, copyright, version, etc.
  64  */
  65
  66 #define DRV_DESCRIPTION \
  67 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 /*
  76  * add "s" to indicate spectrum measurement included.
  77  * we add it here to be consistent with previous releases in which
  78  * this was configurable.
  79  */
  80 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  81 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  82 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88
  89  /* module parameters */
  90 struct iwl_mod_params iwl3945_mod_params = {
  91         .sw_crypto = 1,
  92         .restart_fw = 1,
  93         /* the rest are 0 by default */
  94 };
  95
  96 /**
  97  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  98  * @priv: eeprom and antenna fields are used to determine antenna flags
  99  *
 100  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 101  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 102  *
 103  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 104  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 105  * IWL_ANTENNA_AUX       - Force AUX antenna
 106  */
 107 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 108 {
 109         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 110
 111         switch (iwl3945_mod_params.antenna) {
 112         case IWL_ANTENNA_DIVERSITY:
 113                 return 0;
 114
 115         case IWL_ANTENNA_MAIN:
 116                 if (eeprom->antenna_switch_type)
 117                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 118                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 119
 120         case IWL_ANTENNA_AUX:
 121                 if (eeprom->antenna_switch_type)
 122                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 123                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 124         }
 125
 126         /* bad antenna selector value */
 127         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 128                 iwl3945_mod_params.antenna);
 129
 130         return 0;               /* "diversity" is default if error */
 131 }
 132
 133 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 134                                    struct ieee80211_key_conf *keyconf,
 135                                    u8 sta_id)
 136 {
 137         unsigned long flags;
 138         __le16 key_flags = 0;
 139         int ret;
 140
 141         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 142         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 143
 144         if (sta_id == priv->hw_params.bcast_sta_id)
 145                 key_flags |= STA_KEY_MULTICAST_MSK;
 146
 147         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 148         keyconf->hw_key_idx = keyconf->keyidx;
 149         key_flags &= ~STA_KEY_FLG_INVALID;
 150
 151         spin_lock_irqsave(&priv->sta_lock, flags);
 152         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 153         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 154         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 155                keyconf->keylen);
 156
 157         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 161                         == STA_KEY_FLG_NO_ENC)
 162                 priv->stations[sta_id].sta.key.key_offset =
 163                                  iwl_get_free_ucode_key_index(priv);
 164         /* else, we are overriding an existing key => no need to allocated room
 165         * in uCode. */
 166
 167         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 168                 "no space for a new key");
 169
 170         priv->stations[sta_id].sta.key.key_flags = key_flags;
 171         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 172         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 173
 174         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 175
 176         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 177
 178         spin_unlock_irqrestore(&priv->sta_lock, flags);
 179
 180         return ret;
 181 }
 182
 183 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 184                                   struct ieee80211_key_conf *keyconf,
 185                                   u8 sta_id)
 186 {
 187         return -EOPNOTSUPP;
 188 }
 189
 190 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 191                                   struct ieee80211_key_conf *keyconf,
 192                                   u8 sta_id)
 193 {
 194         return -EOPNOTSUPP;
 195 }
 196
 197 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 198 {
 199         unsigned long flags;
 200
 201         spin_lock_irqsave(&priv->sta_lock, flags);
 202         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 203         memset(&priv->stations[sta_id].sta.key, 0,
 204                 sizeof(struct iwl4965_keyinfo));
 205         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 206         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 207         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 208         spin_unlock_irqrestore(&priv->sta_lock, flags);
 209
 210         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 211         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 212         return 0;
 213 }
 214
 215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 216                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 217 {
 218         int ret = 0;
 219
 220         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 221
 222         switch (keyconf->alg) {
 223         case ALG_CCMP:
 224                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 225                 break;
 226         case ALG_TKIP:
 227                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 228                 break;
 229         case ALG_WEP:
 230                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         default:
 233                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 234                 ret = -EINVAL;
 235         }
 236
 237         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 238                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 239                       sta_id, ret);
 240
 241         return ret;
 242 }
 243
 244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 245 {
 246         int ret = -EOPNOTSUPP;
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_set_static_key(struct iwl_priv *priv,
 252                                 struct ieee80211_key_conf *key)
 253 {
 254         if (key->alg == ALG_WEP)
 255                 return -EOPNOTSUPP;
 256
 257         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 258         return -EINVAL;
 259 }
 260
 261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 262 {
 263         struct list_head *element;
 264
 265         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 266                        priv->frames_count);
 267
 268         while (!list_empty(&priv->free_frames)) {
 269                 element = priv->free_frames.next;
 270                 list_del(element);
 271                 kfree(list_entry(element, struct iwl3945_frame, list));
 272                 priv->frames_count--;
 273         }
 274
 275         if (priv->frames_count) {
 276                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 277                             priv->frames_count);
 278                 priv->frames_count = 0;
 279         }
 280 }
 281
 282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 283 {
 284         struct iwl3945_frame *frame;
 285         struct list_head *element;
 286         if (list_empty(&priv->free_frames)) {
 287                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 288                 if (!frame) {
 289                         IWL_ERR(priv, "Could not allocate frame!\n");
 290                         return NULL;
 291                 }
 292
 293                 priv->frames_count++;
 294                 return frame;
 295         }
 296
 297         element = priv->free_frames.next;
 298         list_del(element);
 299         return list_entry(element, struct iwl3945_frame, list);
 300 }
 301
 302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 303 {
 304         memset(frame, 0, sizeof(*frame));
 305         list_add(&frame->list, &priv->free_frames);
 306 }
 307
 308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 309                                 struct ieee80211_hdr *hdr,
 310                                 int left)
 311 {
 312
 313         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 314             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 315              (priv->iw_mode != NL80211_IFTYPE_AP)))
 316                 return 0;
 317
 318         if (priv->ibss_beacon->len > left)
 319                 return 0;
 320
 321         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 322
 323         return priv->ibss_beacon->len;
 324 }
 325
 326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 327 {
 328         struct iwl3945_frame *frame;
 329         unsigned int frame_size;
 330         int rc;
 331         u8 rate;
 332
 333         frame = iwl3945_get_free_frame(priv);
 334
 335         if (!frame) {
 336                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 337                           "command.\n");
 338                 return -ENOMEM;
 339         }
 340
 341         rate = iwl_rate_get_lowest_plcp(priv);
 342
 343         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 344
 345         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 346                               &frame->u.cmd[0]);
 347
 348         iwl3945_free_frame(priv, frame);
 349
 350         return rc;
 351 }
 352
 353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 354 {
 355         if (priv->_3945.shared_virt)
 356                 dma_free_coherent(&priv->pci_dev->dev,
 357                                   sizeof(struct iwl3945_shared),
 358                                   priv->_3945.shared_virt,
 359                                   priv->_3945.shared_phys);
 360 }
 361
 362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 363                                       struct ieee80211_tx_info *info,
 364                                       struct iwl_device_cmd *cmd,
 365                                       struct sk_buff *skb_frag,
 366                                       int sta_id)
 367 {
 368         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 369         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 370
 371         switch (keyinfo->alg) {
 372         case ALG_CCMP:
 373                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 374                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 375                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 376                 break;
 377
 378         case ALG_TKIP:
 379                 break;
 380
 381         case ALG_WEP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 383                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 384
 385                 if (keyinfo->keylen == 13)
 386                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 387
 388                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 389
 390                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 391                              "with key %d\n", info->control.hw_key->hw_key_idx);
 392                 break;
 393
 394         default:
 395                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 396                 break;
 397         }
 398 }
 399
 400 /*
 401  * handle build REPLY_TX command notification.
 402  */
 403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 404                                   struct iwl_device_cmd *cmd,
 405                                   struct ieee80211_tx_info *info,
 406                                   struct ieee80211_hdr *hdr, u8 std_id)
 407 {
 408         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 409         __le32 tx_flags = tx_cmd->tx_flags;
 410         __le16 fc = hdr->frame_control;
 411
 412         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 413         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 414                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 415                 if (ieee80211_is_mgmt(fc))
 416                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 417                 if (ieee80211_is_probe_resp(fc) &&
 418                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 419                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 420         } else {
 421                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 422                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 423         }
 424
 425         tx_cmd->sta_id = std_id;
 426         if (ieee80211_has_morefrags(fc))
 427                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 428
 429         if (ieee80211_is_data_qos(fc)) {
 430                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 431                 tx_cmd->tid_tspec = qc[0] & 0xf;
 432                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 433         } else {
 434                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 435         }
 436
 437         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 438
 439         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 440                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 441
 442         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 443         if (ieee80211_is_mgmt(fc)) {
 444                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 445                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 446                 else
 447                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 448         } else {
 449                 tx_cmd->timeout.pm_frame_timeout = 0;
 450         }
 451
 452         tx_cmd->driver_txop = 0;
 453         tx_cmd->tx_flags = tx_flags;
 454         tx_cmd->next_frame_len = 0;
 455 }
 456
 457 /*
 458  * start REPLY_TX command process
 459  */
 460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 461 {
 462         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 463         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 464         struct iwl3945_tx_cmd *tx_cmd;
 465         struct iwl_tx_queue *txq = NULL;
 466         struct iwl_queue *q = NULL;
 467         struct iwl_device_cmd *out_cmd;
 468         struct iwl_cmd_meta *out_meta;
 469         dma_addr_t phys_addr;
 470         dma_addr_t txcmd_phys;
 471         int txq_id = skb_get_queue_mapping(skb);
 472         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 473         u8 id;
 474         u8 unicast;
 475         u8 sta_id;
 476         u8 tid = 0;
 477         u16 seq_number = 0;
 478         __le16 fc;
 479         u8 wait_write_ptr = 0;
 480         u8 *qc = NULL;
 481         unsigned long flags;
 482
 483         spin_lock_irqsave(&priv->lock, flags);
 484         if (iwl_is_rfkill(priv)) {
 485                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 486                 goto drop_unlock;
 487         }
 488
 489         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 490                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 491                 goto drop_unlock;
 492         }
 493
 494         unicast = !is_multicast_ether_addr(hdr->addr1);
 495         id = 0;
 496
 497         fc = hdr->frame_control;
 498
 499 #ifdef CONFIG_IWLWIFI_DEBUG
 500         if (ieee80211_is_auth(fc))
 501                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 502         else if (ieee80211_is_assoc_req(fc))
 503                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 504         else if (ieee80211_is_reassoc_req(fc))
 505                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 506 #endif
 507
 508         spin_unlock_irqrestore(&priv->lock, flags);
 509
 510         hdr_len = ieee80211_hdrlen(fc);
 511
 512         /* Find (or create) index into station table for destination station */
 513         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 514                 sta_id = priv->hw_params.bcast_sta_id;
 515         else
 516                 sta_id = iwl_get_sta_id(priv, hdr);
 517         if (sta_id == IWL_INVALID_STATION) {
 518                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 519                                hdr->addr1);
 520                 goto drop;
 521         }
 522
 523         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 524
 525         if (ieee80211_is_data_qos(fc)) {
 526                 qc = ieee80211_get_qos_ctl(hdr);
 527                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 528                 if (unlikely(tid >= MAX_TID_COUNT))
 529                         goto drop;
 530                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 531                                 IEEE80211_SCTL_SEQ;
 532                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 533                         (hdr->seq_ctrl &
 534                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 535                 seq_number += 0x10;
 536         }
 537
 538         /* Descriptor for chosen Tx queue */
 539         txq = &priv->txq[txq_id];
 540         q = &txq->q;
 541
 542         if ((iwl_queue_space(q) < q->high_mark))
 543                 goto drop;
 544
 545         spin_lock_irqsave(&priv->lock, flags);
 546
 547         idx = get_cmd_index(q, q->write_ptr, 0);
 548
 549         /* Set up driver data for this TFD */
 550         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 551         txq->txb[q->write_ptr].skb[0] = skb;
 552
 553         /* Init first empty entry in queue's array of Tx/cmd buffers */
 554         out_cmd = txq->cmd[idx];
 555         out_meta = &txq->meta[idx];
 556         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 557         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 558         memset(tx_cmd, 0, sizeof(*tx_cmd));
 559
 560         /*
 561          * Set up the Tx-command (not MAC!) header.
 562          * Store the chosen Tx queue and TFD index within the sequence field;
 563          * after Tx, uCode's Tx response will return this value so driver can
 564          * locate the frame within the tx queue and do post-tx processing.
 565          */
 566         out_cmd->hdr.cmd = REPLY_TX;
 567         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 568                                 INDEX_TO_SEQ(q->write_ptr)));
 569
 570         /* Copy MAC header from skb into command buffer */
 571         memcpy(tx_cmd->hdr, hdr, hdr_len);
 572
 573
 574         if (info->control.hw_key)
 575                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 576
 577         /* TODO need this for burst mode later on */
 578         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 579
 580         /* set is_hcca to 0; it probably will never be implemented */
 581         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 582
 583         /* Total # bytes to be transmitted */
 584         len = (u16)skb->len;
 585         tx_cmd->len = cpu_to_le16(len);
 586
 587         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 588         iwl_update_stats(priv, true, fc, len);
 589         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 590         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 591
 592         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 593                 txq->need_update = 1;
 594                 if (qc)
 595                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 596         } else {
 597                 wait_write_ptr = 1;
 598                 txq->need_update = 0;
 599         }
 600
 601         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 602                      le16_to_cpu(out_cmd->hdr.sequence));
 603         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 604         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 605         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 606                            ieee80211_hdrlen(fc));
 607
 608         /*
 609          * Use the first empty entry in this queue's command buffer array
 610          * to contain the Tx command and MAC header concatenated together
 611          * (payload data will be in another buffer).
 612          * Size of this varies, due to varying MAC header length.
 613          * If end is not dword aligned, we'll have 2 extra bytes at the end
 614          * of the MAC header (device reads on dword boundaries).
 615          * We'll tell device about this padding later.
 616          */
 617         len = sizeof(struct iwl3945_tx_cmd) +
 618                         sizeof(struct iwl_cmd_header) + hdr_len;
 619
 620         len_org = len;
 621         len = (len + 3) & ~3;
 622
 623         if (len_org != len)
 624                 len_org = 1;
 625         else
 626                 len_org = 0;
 627
 628         /* Physical address of this Tx command's header (not MAC header!),
 629          * within command buffer array. */
 630         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 631                                     len, PCI_DMA_TODEVICE);
 632         /* we do not map meta data ... so we can safely access address to
 633          * provide to unmap command*/
 634         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 635         pci_unmap_len_set(out_meta, len, len);
 636
 637         /* Add buffer containing Tx command and MAC(!) header to TFD's
 638          * first entry */
 639         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 640                                                    txcmd_phys, len, 1, 0);
 641
 642
 643         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 644          * if any (802.11 null frames have no payload). */
 645         len = skb->len - hdr_len;
 646         if (len) {
 647                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 648                                            len, PCI_DMA_TODEVICE);
 649                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 650                                                            phys_addr, len,
 651                                                            0, U32_PAD(len));
 652         }
 653
 654
 655         /* Tell device the write index *just past* this latest filled TFD */
 656         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 657         iwl_txq_update_write_ptr(priv, txq);
 658         spin_unlock_irqrestore(&priv->lock, flags);
 659
 660         if ((iwl_queue_space(q) < q->high_mark)
 661             && priv->mac80211_registered) {
 662                 if (wait_write_ptr) {
 663                         spin_lock_irqsave(&priv->lock, flags);
 664                         txq->need_update = 1;
 665                         iwl_txq_update_write_ptr(priv, txq);
 666                         spin_unlock_irqrestore(&priv->lock, flags);
 667                 }
 668
 669                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 670         }
 671
 672         return 0;
 673
 674 drop_unlock:
 675         spin_unlock_irqrestore(&priv->lock, flags);
 676 drop:
 677         return -1;
 678 }
 679
 680 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 681 #define BEACON_TIME_MASK_HIGH   0xFF000000
 682 #define TIME_UNIT               1024
 683
 684 /*
 685  * extended beacon time format
 686  * time in usec will be changed into a 32-bit value in 8:24 format
 687  * the high 1 byte is the beacon counts
 688  * the lower 3 bytes is the time in usec within one beacon interval
 689  */
 690
 691 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 692 {
 693         u32 quot;
 694         u32 rem;
 695         u32 interval = beacon_interval * 1024;
 696
 697         if (!interval || !usec)
 698                 return 0;
 699
 700         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 701         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 702
 703         return (quot << 24) + rem;
 704 }
 705
 706 /* base is usually what we get from ucode with each received frame,
 707  * the same as HW timer counter counting down
 708  */
 709
 710 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 711 {
 712         u32 base_low = base & BEACON_TIME_MASK_LOW;
 713         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 714         u32 interval = beacon_interval * TIME_UNIT;
 715         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 716             (addon & BEACON_TIME_MASK_HIGH);
 717
 718         if (base_low > addon_low)
 719                 res += base_low - addon_low;
 720         else if (base_low < addon_low) {
 721                 res += interval + base_low - addon_low;
 722                 res += (1 << 24);
 723         } else
 724                 res += (1 << 24);
 725
 726         return cpu_to_le32(res);
 727 }
 728
 729 static int iwl3945_get_measurement(struct iwl_priv *priv,
 730                                struct ieee80211_measurement_params *params,
 731                                u8 type)
 732 {
 733         struct iwl_spectrum_cmd spectrum;
 734         struct iwl_rx_packet *pkt;
 735         struct iwl_host_cmd cmd = {
 736                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 737                 .data = (void *)&spectrum,
 738                 .flags = CMD_WANT_SKB,
 739         };
 740         u32 add_time = le64_to_cpu(params->start_time);
 741         int rc;
 742         int spectrum_resp_status;
 743         int duration = le16_to_cpu(params->duration);
 744
 745         if (iwl_is_associated(priv))
 746                 add_time =
 747                     iwl3945_usecs_to_beacons(
 748                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 749                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 750
 751         memset(&spectrum, 0, sizeof(spectrum));
 752
 753         spectrum.channel_count = cpu_to_le16(1);
 754         spectrum.flags =
 755             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 756         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 757         cmd.len = sizeof(spectrum);
 758         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 759
 760         if (iwl_is_associated(priv))
 761                 spectrum.start_time =
 762                     iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
 763                                 add_time,
 764                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 765         else
 766                 spectrum.start_time = 0;
 767
 768         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 769         spectrum.channels[0].channel = params->channel;
 770         spectrum.channels[0].type = type;
 771         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 772                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 773                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 774
 775         rc = iwl_send_cmd_sync(priv, &cmd);
 776         if (rc)
 777                 return rc;
 778
 779         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 780         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 781                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 782                 rc = -EIO;
 783         }
 784
 785         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 786         switch (spectrum_resp_status) {
 787         case 0:         /* Command will be handled */
 788                 if (pkt->u.spectrum.id != 0xff) {
 789                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 790                                                 pkt->u.spectrum.id);
 791                         priv->measurement_status &= ~MEASUREMENT_READY;
 792                 }
 793                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 794                 rc = 0;
 795                 break;
 796
 797         case 1:         /* Command will not be handled */
 798                 rc = -EAGAIN;
 799                 break;
 800         }
 801
 802         iwl_free_pages(priv, cmd.reply_page);
 803
 804         return rc;
 805 }
 806
 807 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 808                                struct iwl_rx_mem_buffer *rxb)
 809 {
 810         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 811         struct iwl_alive_resp *palive;
 812         struct delayed_work *pwork;
 813
 814         palive = &pkt->u.alive_frame;
 815
 816         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 817                        "0x%01X 0x%01X\n",
 818                        palive->is_valid, palive->ver_type,
 819                        palive->ver_subtype);
 820
 821         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 822                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 823                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 824                        sizeof(struct iwl_alive_resp));
 825                 pwork = &priv->init_alive_start;
 826         } else {
 827                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 828                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 829                        sizeof(struct iwl_alive_resp));
 830                 pwork = &priv->alive_start;
 831                 iwl3945_disable_events(priv);
 832         }
 833
 834         /* We delay the ALIVE response by 5ms to
 835          * give the HW RF Kill time to activate... */
 836         if (palive->is_valid == UCODE_VALID_OK)
 837                 queue_delayed_work(priv->workqueue, pwork,
 838                                    msecs_to_jiffies(5));
 839         else
 840                 IWL_WARN(priv, "uCode did not respond OK.\n");
 841 }
 842
 843 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 844                                  struct iwl_rx_mem_buffer *rxb)
 845 {
 846 #ifdef CONFIG_IWLWIFI_DEBUG
 847         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 848 #endif
 849
 850         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 851 }
 852
 853 static void iwl3945_bg_beacon_update(struct work_struct *work)
 854 {
 855         struct iwl_priv *priv =
 856                 container_of(work, struct iwl_priv, beacon_update);
 857         struct sk_buff *beacon;
 858
 859         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 860         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 861
 862         if (!beacon) {
 863                 IWL_ERR(priv, "update beacon failed\n");
 864                 return;
 865         }
 866
 867         mutex_lock(&priv->mutex);
 868         /* new beacon skb is allocated every time; dispose previous.*/
 869         if (priv->ibss_beacon)
 870                 dev_kfree_skb(priv->ibss_beacon);
 871
 872         priv->ibss_beacon = beacon;
 873         mutex_unlock(&priv->mutex);
 874
 875         iwl3945_send_beacon_cmd(priv);
 876 }
 877
 878 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 879                                 struct iwl_rx_mem_buffer *rxb)
 880 {
 881 #ifdef CONFIG_IWLWIFI_DEBUG
 882         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 883         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 884         u8 rate = beacon->beacon_notify_hdr.rate;
 885
 886         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 887                 "tsf %d %d rate %d\n",
 888                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 889                 beacon->beacon_notify_hdr.failure_frame,
 890                 le32_to_cpu(beacon->ibss_mgr_status),
 891                 le32_to_cpu(beacon->high_tsf),
 892                 le32_to_cpu(beacon->low_tsf), rate);
 893 #endif
 894
 895         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 896             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 897                 queue_work(priv->workqueue, &priv->beacon_update);
 898 }
 899
 900 /* Handle notification from uCode that card's power state is changing
 901  * due to software, hardware, or critical temperature RFKILL */
 902 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 903                                     struct iwl_rx_mem_buffer *rxb)
 904 {
 905         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 906         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 907         unsigned long status = priv->status;
 908
 909         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 910                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 911                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 912
 913         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 914                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 915
 916         if (flags & HW_CARD_DISABLED)
 917                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 918         else
 919                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 920
 921
 922         iwl_scan_cancel(priv);
 923
 924         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 925              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 926                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 927                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 928         else
 929                 wake_up_interruptible(&priv->wait_command_queue);
 930 }
 931
 932 /**
 933  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 934  *
 935  * Setup the RX handlers for each of the reply types sent from the uCode
 936  * to the host.
 937  *
 938  * This function chains into the hardware specific files for them to setup
 939  * any hardware specific handlers as well.
 940  */
 941 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 942 {
 943         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 944         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 945         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 946         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 947         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 948                         iwl_rx_spectrum_measure_notif;
 949         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 950         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 951             iwl_rx_pm_debug_statistics_notif;
 952         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 953
 954         /*
 955          * The same handler is used for both the REPLY to a discrete
 956          * statistics request from the host as well as for the periodic
 957          * statistics notifications (after received beacons) from the uCode.
 958          */
 959         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 960         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 961
 962         iwl_setup_rx_scan_handlers(priv);
 963         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 964
 965         /* Set up hardware specific Rx handlers */
 966         iwl3945_hw_rx_handler_setup(priv);
 967 }
 968
 969 /************************** RX-FUNCTIONS ****************************/
 970 /*
 971  * Rx theory of operation
 972  *
 973  * The host allocates 32 DMA target addresses and passes the host address
 974  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 975  * 0 to 31
 976  *
 977  * Rx Queue Indexes
 978  * The host/firmware share two index registers for managing the Rx buffers.
 979  *
 980  * The READ index maps to the first position that the firmware may be writing
 981  * to -- the driver can read up to (but not including) this position and get
 982  * good data.
 983  * The READ index is managed by the firmware once the card is enabled.
 984  *
 985  * The WRITE index maps to the last position the driver has read from -- the
 986  * position preceding WRITE is the last slot the firmware can place a packet.
 987  *
 988  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 989  * WRITE = READ.
 990  *
 991  * During initialization, the host sets up the READ queue position to the first
 992  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 993  *
 994  * When the firmware places a packet in a buffer, it will advance the READ index
 995  * and fire the RX interrupt.  The driver can then query the READ index and
 996  * process as many packets as possible, moving the WRITE index forward as it
 997  * resets the Rx queue buffers with new memory.
 998  *
 999  * The management in the driver is as follows:
1000  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1001  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1002  *   to replenish the iwl->rxq->rx_free.
1003  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1004  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1005  *   'processed' and 'read' driver indexes as well)
1006  * + A received packet is processed and handed to the kernel network stack,
1007  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1008  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1009  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1010  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1011  *   were enough free buffers and RX_STALLED is set it is cleared.
1012  *
1013  *
1014  * Driver sequence:
1015  *
1016  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1017  *                            iwl3945_rx_queue_restock
1018  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1019  *                            queue, updates firmware pointers, and updates
1020  *                            the WRITE index.  If insufficient rx_free buffers
1021  *                            are available, schedules iwl3945_rx_replenish
1022  *
1023  * -- enable interrupts --
1024  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1025  *                            READ INDEX, detaching the SKB from the pool.
1026  *                            Moves the packet buffer from queue to rx_used.
1027  *                            Calls iwl3945_rx_queue_restock to refill any empty
1028  *                            slots.
1029  * ...
1030  *
1031  */
1032
1033 /**
1034  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1035  */
1036 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1037                                           dma_addr_t dma_addr)
1038 {
1039         return cpu_to_le32((u32)dma_addr);
1040 }
1041
1042 /**
1043  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1044  *
1045  * If there are slots in the RX queue that need to be restocked,
1046  * and we have free pre-allocated buffers, fill the ranks as much
1047  * as we can, pulling from rx_free.
1048  *
1049  * This moves the 'write' index forward to catch up with 'processed', and
1050  * also updates the memory address in the firmware to reference the new
1051  * target buffer.
1052  */
1053 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1054 {
1055         struct iwl_rx_queue *rxq = &priv->rxq;
1056         struct list_head *element;
1057         struct iwl_rx_mem_buffer *rxb;
1058         unsigned long flags;
1059         int write;
1060
1061         spin_lock_irqsave(&rxq->lock, flags);
1062         write = rxq->write & ~0x7;
1063         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1064                 /* Get next free Rx buffer, remove from free list */
1065                 element = rxq->rx_free.next;
1066                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1067                 list_del(element);
1068
1069                 /* Point to Rx buffer via next RBD in circular buffer */
1070                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1071                 rxq->queue[rxq->write] = rxb;
1072                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1073                 rxq->free_count--;
1074         }
1075         spin_unlock_irqrestore(&rxq->lock, flags);
1076         /* If the pre-allocated buffer pool is dropping low, schedule to
1077          * refill it */
1078         if (rxq->free_count <= RX_LOW_WATERMARK)
1079                 queue_work(priv->workqueue, &priv->rx_replenish);
1080
1081
1082         /* If we've added more space for the firmware to place data, tell it.
1083          * Increment device's write pointer in multiples of 8. */
1084         if ((rxq->write_actual != (rxq->write & ~0x7))
1085             || (abs(rxq->write - rxq->read) > 7)) {
1086                 spin_lock_irqsave(&rxq->lock, flags);
1087                 rxq->need_update = 1;
1088                 spin_unlock_irqrestore(&rxq->lock, flags);
1089                 iwl_rx_queue_update_write_ptr(priv, rxq);
1090         }
1091 }
1092
1093 /**
1094  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1095  *
1096  * When moving to rx_free an SKB is allocated for the slot.
1097  *
1098  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1099  * This is called as a scheduled work item (except for during initialization)
1100  */
1101 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1102 {
1103         struct iwl_rx_queue *rxq = &priv->rxq;
1104         struct list_head *element;
1105         struct iwl_rx_mem_buffer *rxb;
1106         struct page *page;
1107         unsigned long flags;
1108         gfp_t gfp_mask = priority;
1109
1110         while (1) {
1111                 spin_lock_irqsave(&rxq->lock, flags);
1112
1113                 if (list_empty(&rxq->rx_used)) {
1114                         spin_unlock_irqrestore(&rxq->lock, flags);
1115                         return;
1116                 }
1117                 spin_unlock_irqrestore(&rxq->lock, flags);
1118
1119                 if (rxq->free_count > RX_LOW_WATERMARK)
1120                         gfp_mask |= __GFP_NOWARN;
1121
1122                 if (priv->hw_params.rx_page_order > 0)
1123                         gfp_mask |= __GFP_COMP;
1124
1125                 /* Alloc a new receive buffer */
1126                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1127                 if (!page) {
1128                         if (net_ratelimit())
1129                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1130                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1131                             net_ratelimit())
1132                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1133                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1134                                          rxq->free_count);
1135                         /* We don't reschedule replenish work here -- we will
1136                          * call the restock method and if it still needs
1137                          * more buffers it will schedule replenish */
1138                         break;
1139                 }
1140
1141                 spin_lock_irqsave(&rxq->lock, flags);
1142                 if (list_empty(&rxq->rx_used)) {
1143                         spin_unlock_irqrestore(&rxq->lock, flags);
1144                         __free_pages(page, priv->hw_params.rx_page_order);
1145                         return;
1146                 }
1147                 element = rxq->rx_used.next;
1148                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1149                 list_del(element);
1150                 spin_unlock_irqrestore(&rxq->lock, flags);
1151
1152                 rxb->page = page;
1153                 /* Get physical address of RB/SKB */
1154                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1155                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1156                                 PCI_DMA_FROMDEVICE);
1157
1158                 spin_lock_irqsave(&rxq->lock, flags);
1159
1160                 list_add_tail(&rxb->list, &rxq->rx_free);
1161                 rxq->free_count++;
1162                 priv->alloc_rxb_page++;
1163
1164                 spin_unlock_irqrestore(&rxq->lock, flags);
1165         }
1166 }
1167
1168 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1169 {
1170         unsigned long flags;
1171         int i;
1172         spin_lock_irqsave(&rxq->lock, flags);
1173         INIT_LIST_HEAD(&rxq->rx_free);
1174         INIT_LIST_HEAD(&rxq->rx_used);
1175         /* Fill the rx_used queue with _all_ of the Rx buffers */
1176         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1177                 /* In the reset function, these buffers may have been allocated
1178                  * to an SKB, so we need to unmap and free potential storage */
1179                 if (rxq->pool[i].page != NULL) {
1180                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1181                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1182                                 PCI_DMA_FROMDEVICE);
1183                         __iwl_free_pages(priv, rxq->pool[i].page);
1184                         rxq->pool[i].page = NULL;
1185                 }
1186                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1187         }
1188
1189         /* Set us so that we have processed and used all buffers, but have
1190          * not restocked the Rx queue with fresh buffers */
1191         rxq->read = rxq->write = 0;
1192         rxq->write_actual = 0;
1193         rxq->free_count = 0;
1194         spin_unlock_irqrestore(&rxq->lock, flags);
1195 }
1196
1197 void iwl3945_rx_replenish(void *data)
1198 {
1199         struct iwl_priv *priv = data;
1200         unsigned long flags;
1201
1202         iwl3945_rx_allocate(priv, GFP_KERNEL);
1203
1204         spin_lock_irqsave(&priv->lock, flags);
1205         iwl3945_rx_queue_restock(priv);
1206         spin_unlock_irqrestore(&priv->lock, flags);
1207 }
1208
1209 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1210 {
1211         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1212
1213         iwl3945_rx_queue_restock(priv);
1214 }
1215
1216
1217 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1218  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1219  * This free routine walks the list of POOL entries and if SKB is set to
1220  * non NULL it is unmapped and freed
1221  */
1222 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1223 {
1224         int i;
1225         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1226                 if (rxq->pool[i].page != NULL) {
1227                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1228                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1229                                 PCI_DMA_FROMDEVICE);
1230                         __iwl_free_pages(priv, rxq->pool[i].page);
1231                         rxq->pool[i].page = NULL;
1232                 }
1233         }
1234
1235         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1236                           rxq->dma_addr);
1237         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1238                           rxq->rb_stts, rxq->rb_stts_dma);
1239         rxq->bd = NULL;
1240         rxq->rb_stts  = NULL;
1241 }
1242
1243
1244 /* Convert linear signal-to-noise ratio into dB */
1245 static u8 ratio2dB[100] = {
1246 /*       0   1   2   3   4   5   6   7   8   9 */
1247          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1248         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1249         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1250         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1251         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1252         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1253         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1254         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1255         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1256         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1257 };
1258
1259 /* Calculates a relative dB value from a ratio of linear
1260  *   (i.e. not dB) signal levels.
1261  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1262 int iwl3945_calc_db_from_ratio(int sig_ratio)
1263 {
1264         /* 1000:1 or higher just report as 60 dB */
1265         if (sig_ratio >= 1000)
1266                 return 60;
1267
1268         /* 100:1 or higher, divide by 10 and use table,
1269          *   add 20 dB to make up for divide by 10 */
1270         if (sig_ratio >= 100)
1271                 return 20 + (int)ratio2dB[sig_ratio/10];
1272
1273         /* We shouldn't see this */
1274         if (sig_ratio < 1)
1275                 return 0;
1276
1277         /* Use table for ratios 1:1 - 99:1 */
1278         return (int)ratio2dB[sig_ratio];
1279 }
1280
1281 /**
1282  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1283  *
1284  * Uses the priv->rx_handlers callback function array to invoke
1285  * the appropriate handlers, including command responses,
1286  * frame-received notifications, and other notifications.
1287  */
1288 static void iwl3945_rx_handle(struct iwl_priv *priv)
1289 {
1290         struct iwl_rx_mem_buffer *rxb;
1291         struct iwl_rx_packet *pkt;
1292         struct iwl_rx_queue *rxq = &priv->rxq;
1293         u32 r, i;
1294         int reclaim;
1295         unsigned long flags;
1296         u8 fill_rx = 0;
1297         u32 count = 8;
1298         int total_empty = 0;
1299
1300         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1301          * buffer that the driver may process (last buffer filled by ucode). */
1302         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1303         i = rxq->read;
1304
1305         /* calculate total frames need to be restock after handling RX */
1306         total_empty = r - rxq->write_actual;
1307         if (total_empty < 0)
1308                 total_empty += RX_QUEUE_SIZE;
1309
1310         if (total_empty > (RX_QUEUE_SIZE / 2))
1311                 fill_rx = 1;
1312         /* Rx interrupt, but nothing sent from uCode */
1313         if (i == r)
1314                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1315
1316         while (i != r) {
1317                 rxb = rxq->queue[i];
1318
1319                 /* If an RXB doesn't have a Rx queue slot associated with it,
1320                  * then a bug has been introduced in the queue refilling
1321                  * routines -- catch it here */
1322                 BUG_ON(rxb == NULL);
1323
1324                 rxq->queue[i] = NULL;
1325
1326                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1327                                PAGE_SIZE << priv->hw_params.rx_page_order,
1328                                PCI_DMA_FROMDEVICE);
1329                 pkt = rxb_addr(rxb);
1330
1331                 trace_iwlwifi_dev_rx(priv, pkt,
1332                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1333
1334                 /* Reclaim a command buffer only if this packet is a response
1335                  *   to a (driver-originated) command.
1336                  * If the packet (e.g. Rx frame) originated from uCode,
1337                  *   there is no command buffer to reclaim.
1338                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1339                  *   but apparently a few don't get set; catch them here. */
1340                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1341                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1342                         (pkt->hdr.cmd != REPLY_TX);
1343
1344                 /* Based on type of command response or notification,
1345                  *   handle those that need handling via function in
1346                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1347                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1348                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1349                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1350                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1351                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1352                 } else {
1353                         /* No handling needed */
1354                         IWL_DEBUG_RX(priv,
1355                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1356                                 r, i, get_cmd_string(pkt->hdr.cmd),
1357                                 pkt->hdr.cmd);
1358                 }
1359
1360                 /*
1361                  * XXX: After here, we should always check rxb->page
1362                  * against NULL before touching it or its virtual
1363                  * memory (pkt). Because some rx_handler might have
1364                  * already taken or freed the pages.
1365                  */
1366
1367                 if (reclaim) {
1368                         /* Invoke any callbacks, transfer the buffer to caller,
1369                          * and fire off the (possibly) blocking iwl_send_cmd()
1370                          * as we reclaim the driver command queue */
1371                         if (rxb->page)
1372                                 iwl_tx_cmd_complete(priv, rxb);
1373                         else
1374                                 IWL_WARN(priv, "Claim null rxb?\n");
1375                 }
1376
1377                 /* Reuse the page if possible. For notification packets and
1378                  * SKBs that fail to Rx correctly, add them back into the
1379                  * rx_free list for reuse later. */
1380                 spin_lock_irqsave(&rxq->lock, flags);
1381                 if (rxb->page != NULL) {
1382                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1383                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1384                                 PCI_DMA_FROMDEVICE);
1385                         list_add_tail(&rxb->list, &rxq->rx_free);
1386                         rxq->free_count++;
1387                 } else
1388                         list_add_tail(&rxb->list, &rxq->rx_used);
1389
1390                 spin_unlock_irqrestore(&rxq->lock, flags);
1391
1392                 i = (i + 1) & RX_QUEUE_MASK;
1393                 /* If there are a lot of unused frames,
1394                  * restock the Rx queue so ucode won't assert. */
1395                 if (fill_rx) {
1396                         count++;
1397                         if (count >= 8) {
1398                                 rxq->read = i;
1399                                 iwl3945_rx_replenish_now(priv);
1400                                 count = 0;
1401                         }
1402                 }
1403         }
1404
1405         /* Backtrack one entry */
1406         rxq->read = i;
1407         if (fill_rx)
1408                 iwl3945_rx_replenish_now(priv);
1409         else
1410                 iwl3945_rx_queue_restock(priv);
1411 }
1412
1413 /* call this function to flush any scheduled tasklet */
1414 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1415 {
1416         /* wait to make sure we flush pending tasklet*/
1417         synchronize_irq(priv->pci_dev->irq);
1418         tasklet_kill(&priv->irq_tasklet);
1419 }
1420
1421 static const char *desc_lookup(int i)
1422 {
1423         switch (i) {
1424         case 1:
1425                 return "FAIL";
1426         case 2:
1427                 return "BAD_PARAM";
1428         case 3:
1429                 return "BAD_CHECKSUM";
1430         case 4:
1431                 return "NMI_INTERRUPT";
1432         case 5:
1433                 return "SYSASSERT";
1434         case 6:
1435                 return "FATAL_ERROR";
1436         }
1437
1438         return "UNKNOWN";
1439 }
1440
1441 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1442 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1443
1444 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1445 {
1446         u32 i;
1447         u32 desc, time, count, base, data1;
1448         u32 blink1, blink2, ilink1, ilink2;
1449
1450         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1451
1452         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1453                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1454                 return;
1455         }
1456
1457
1458         count = iwl_read_targ_mem(priv, base);
1459
1460         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1461                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1462                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1463                         priv->status, count);
1464         }
1465
1466         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1467                   "ilink1  nmiPC   Line\n");
1468         for (i = ERROR_START_OFFSET;
1469              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1470              i += ERROR_ELEM_SIZE) {
1471                 desc = iwl_read_targ_mem(priv, base + i);
1472                 time =
1473                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1474                 blink1 =
1475                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1476                 blink2 =
1477                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1478                 ilink1 =
1479                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1480                 ilink2 =
1481                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1482                 data1 =
1483                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1484
1485                 IWL_ERR(priv,
1486                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1487                         desc_lookup(desc), desc, time, blink1, blink2,
1488                         ilink1, ilink2, data1);
1489                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1490                                         0, blink1, blink2, ilink1, ilink2);
1491         }
1492 }
1493
1494 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1495
1496 /**
1497  * iwl3945_print_event_log - Dump error event log to syslog
1498  *
1499  */
1500 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1501                                   u32 num_events, u32 mode,
1502                                   int pos, char **buf, size_t bufsz)
1503 {
1504         u32 i;
1505         u32 base;       /* SRAM byte address of event log header */
1506         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1507         u32 ptr;        /* SRAM byte address of log data */
1508         u32 ev, time, data; /* event log data */
1509         unsigned long reg_flags;
1510
1511         if (num_events == 0)
1512                 return pos;
1513
1514         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1515
1516         if (mode == 0)
1517                 event_size = 2 * sizeof(u32);
1518         else
1519                 event_size = 3 * sizeof(u32);
1520
1521         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1522
1523         /* Make sure device is powered up for SRAM reads */
1524         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1525         iwl_grab_nic_access(priv);
1526
1527         /* Set starting address; reads will auto-increment */
1528         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1529         rmb();
1530
1531         /* "time" is actually "data" for mode 0 (no timestamp).
1532          * place event id # at far right for easier visual parsing. */
1533         for (i = 0; i < num_events; i++) {
1534                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1535                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1536                 if (mode == 0) {
1537                         /* data, ev */
1538                         if (bufsz) {
1539                                 pos += scnprintf(*buf + pos, bufsz - pos,
1540                                                 "0x%08x:%04u\n",
1541                                                 time, ev);
1542                         } else {
1543                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1544                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1545                                                               time, ev);
1546                         }
1547                 } else {
1548                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1549                         if (bufsz) {
1550                                 pos += scnprintf(*buf + pos, bufsz - pos,
1551                                                 "%010u:0x%08x:%04u\n",
1552                                                  time, data, ev);
1553                         } else {
1554                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1555                                         time, data, ev);
1556                                 trace_iwlwifi_dev_ucode_event(priv, time,
1557                                                               data, ev);
1558                         }
1559                 }
1560         }
1561
1562         /* Allow device to power down */
1563         iwl_release_nic_access(priv);
1564         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1565         return pos;
1566 }
1567
1568 /**
1569  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1570  */
1571 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1572                                       u32 num_wraps, u32 next_entry,
1573                                       u32 size, u32 mode,
1574                                       int pos, char **buf, size_t bufsz)
1575 {
1576         /*
1577          * display the newest DEFAULT_LOG_ENTRIES entries
1578          * i.e the entries just before the next ont that uCode would fill.
1579          */
1580         if (num_wraps) {
1581                 if (next_entry < size) {
1582                         pos = iwl3945_print_event_log(priv,
1583                                              capacity - (size - next_entry),
1584                                              size - next_entry, mode,
1585                                              pos, buf, bufsz);
1586                         pos = iwl3945_print_event_log(priv, 0,
1587                                                       next_entry, mode,
1588                                                       pos, buf, bufsz);
1589                 } else
1590                         pos = iwl3945_print_event_log(priv, next_entry - size,
1591                                                       size, mode,
1592                                                       pos, buf, bufsz);
1593         } else {
1594                 if (next_entry < size)
1595                         pos = iwl3945_print_event_log(priv, 0,
1596                                                       next_entry, mode,
1597                                                       pos, buf, bufsz);
1598                 else
1599                         pos = iwl3945_print_event_log(priv, next_entry - size,
1600                                                       size, mode,
1601                                                       pos, buf, bufsz);
1602         }
1603         return pos;
1604 }
1605
1606 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1607
1608 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1609                             char **buf, bool display)
1610 {
1611         u32 base;       /* SRAM byte address of event log header */
1612         u32 capacity;   /* event log capacity in # entries */
1613         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1614         u32 num_wraps;  /* # times uCode wrapped to top of log */
1615         u32 next_entry; /* index of next entry to be written by uCode */
1616         u32 size;       /* # entries that we'll print */
1617         int pos = 0;
1618         size_t bufsz = 0;
1619
1620         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1621         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1622                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1623                 return  -EINVAL;
1624         }
1625
1626         /* event log header */
1627         capacity = iwl_read_targ_mem(priv, base);
1628         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1629         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1630         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1631
1632         if (capacity > priv->cfg->max_event_log_size) {
1633                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1634                         capacity, priv->cfg->max_event_log_size);
1635                 capacity = priv->cfg->max_event_log_size;
1636         }
1637
1638         if (next_entry > priv->cfg->max_event_log_size) {
1639                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1640                         next_entry, priv->cfg->max_event_log_size);
1641                 next_entry = priv->cfg->max_event_log_size;
1642         }
1643
1644         size = num_wraps ? capacity : next_entry;
1645
1646         /* bail out if nothing in log */
1647         if (size == 0) {
1648                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1649                 return pos;
1650         }
1651
1652 #ifdef CONFIG_IWLWIFI_DEBUG
1653         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1654                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1655                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1656 #else
1657         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1658                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1659 #endif
1660
1661         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1662                   size);
1663
1664 #ifdef CONFIG_IWLWIFI_DEBUG
1665         if (display) {
1666                 if (full_log)
1667                         bufsz = capacity * 48;
1668                 else
1669                         bufsz = size * 48;
1670                 *buf = kmalloc(bufsz, GFP_KERNEL);
1671                 if (!*buf)
1672                         return -ENOMEM;
1673         }
1674         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1675                 /* if uCode has wrapped back to top of log,
1676                  * start at the oldest entry,
1677                  * i.e the next one that uCode would fill.
1678                  */
1679                 if (num_wraps)
1680                         pos = iwl3945_print_event_log(priv, next_entry,
1681                                                 capacity - next_entry, mode,
1682                                                 pos, buf, bufsz);
1683
1684                 /* (then/else) start at top of log */
1685                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1686                                               pos, buf, bufsz);
1687         } else
1688                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1689                                                     next_entry, size, mode,
1690                                                     pos, buf, bufsz);
1691 #else
1692         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1693                                             next_entry, size, mode,
1694                                             pos, buf, bufsz);
1695 #endif
1696         return pos;
1697 }
1698
1699 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1700 {
1701         u32 inta, handled = 0;
1702         u32 inta_fh;
1703         unsigned long flags;
1704 #ifdef CONFIG_IWLWIFI_DEBUG
1705         u32 inta_mask;
1706 #endif
1707
1708         spin_lock_irqsave(&priv->lock, flags);
1709
1710         /* Ack/clear/reset pending uCode interrupts.
1711          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1712          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1713         inta = iwl_read32(priv, CSR_INT);
1714         iwl_write32(priv, CSR_INT, inta);
1715
1716         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1717          * Any new interrupts that happen after this, either while we're
1718          * in this tasklet, or later, will show up in next ISR/tasklet. */
1719         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1720         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1721
1722 #ifdef CONFIG_IWLWIFI_DEBUG
1723         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1724                 /* just for debug */
1725                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1726                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1727                               inta, inta_mask, inta_fh);
1728         }
1729 #endif
1730
1731         spin_unlock_irqrestore(&priv->lock, flags);
1732
1733         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1734          * atomic, make sure that inta covers all the interrupts that
1735          * we've discovered, even if FH interrupt came in just after
1736          * reading CSR_INT. */
1737         if (inta_fh & CSR39_FH_INT_RX_MASK)
1738                 inta |= CSR_INT_BIT_FH_RX;
1739         if (inta_fh & CSR39_FH_INT_TX_MASK)
1740                 inta |= CSR_INT_BIT_FH_TX;
1741
1742         /* Now service all interrupt bits discovered above. */
1743         if (inta & CSR_INT_BIT_HW_ERR) {
1744                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1745
1746                 /* Tell the device to stop sending interrupts */
1747                 iwl_disable_interrupts(priv);
1748
1749                 priv->isr_stats.hw++;
1750                 iwl_irq_handle_error(priv);
1751
1752                 handled |= CSR_INT_BIT_HW_ERR;
1753
1754                 return;
1755         }
1756
1757 #ifdef CONFIG_IWLWIFI_DEBUG
1758         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1759                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1760                 if (inta & CSR_INT_BIT_SCD) {
1761                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1762                                       "the frame/frames.\n");
1763                         priv->isr_stats.sch++;
1764                 }
1765
1766                 /* Alive notification via Rx interrupt will do the real work */
1767                 if (inta & CSR_INT_BIT_ALIVE) {
1768                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1769                         priv->isr_stats.alive++;
1770                 }
1771         }
1772 #endif
1773         /* Safely ignore these bits for debug checks below */
1774         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1775
1776         /* Error detected by uCode */
1777         if (inta & CSR_INT_BIT_SW_ERR) {
1778                 IWL_ERR(priv, "Microcode SW error detected. "
1779                         "Restarting 0x%X.\n", inta);
1780                 priv->isr_stats.sw++;
1781                 priv->isr_stats.sw_err = inta;
1782                 iwl_irq_handle_error(priv);
1783                 handled |= CSR_INT_BIT_SW_ERR;
1784         }
1785
1786         /* uCode wakes up after power-down sleep */
1787         if (inta & CSR_INT_BIT_WAKEUP) {
1788                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1789                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1790                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1791                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1792                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1793                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1794                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1795                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1796
1797                 priv->isr_stats.wakeup++;
1798                 handled |= CSR_INT_BIT_WAKEUP;
1799         }
1800
1801         /* All uCode command responses, including Tx command responses,
1802          * Rx "responses" (frame-received notification), and other
1803          * notifications from uCode come through here*/
1804         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1805                 iwl3945_rx_handle(priv);
1806                 priv->isr_stats.rx++;
1807                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1808         }
1809
1810         if (inta & CSR_INT_BIT_FH_TX) {
1811                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1812                 priv->isr_stats.tx++;
1813
1814                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1815                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1816                                         (FH39_SRVC_CHNL), 0x0);
1817                 handled |= CSR_INT_BIT_FH_TX;
1818         }
1819
1820         if (inta & ~handled) {
1821                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1822                 priv->isr_stats.unhandled++;
1823         }
1824
1825         if (inta & ~priv->inta_mask) {
1826                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1827                          inta & ~priv->inta_mask);
1828                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1829         }
1830
1831         /* Re-enable all interrupts */
1832         /* only Re-enable if disabled by irq */
1833         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1834                 iwl_enable_interrupts(priv);
1835
1836 #ifdef CONFIG_IWLWIFI_DEBUG
1837         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1838                 inta = iwl_read32(priv, CSR_INT);
1839                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1840                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1841                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1842                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1843         }
1844 #endif
1845 }
1846
1847 static int iwl3945_get_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 {
1852         struct ieee80211_channel *chan;
1853         const struct ieee80211_supported_band *sband;
1854         const struct iwl_channel_info *ch_info;
1855         u16 passive_dwell = 0;
1856         u16 active_dwell = 0;
1857         int added, i;
1858
1859         sband = iwl_get_hw_mode(priv, band);
1860         if (!sband)
1861                 return 0;
1862
1863         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1864         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1865
1866         if (passive_dwell <= active_dwell)
1867                 passive_dwell = active_dwell + 1;
1868
1869         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1870                 chan = priv->scan_request->channels[i];
1871
1872                 if (chan->band != band)
1873                         continue;
1874
1875                 scan_ch->channel = chan->hw_value;
1876
1877                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1878                 if (!is_channel_valid(ch_info)) {
1879                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1880                                        scan_ch->channel);
1881                         continue;
1882                 }
1883
1884                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1885                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1886                 /* If passive , set up for auto-switch
1887                  *  and use long active_dwell time.
1888                  */
1889                 if (!is_active || is_channel_passive(ch_info) ||
1890                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1891                         scan_ch->type = 0;      /* passive */
1892                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1893                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1894                 } else {
1895                         scan_ch->type = 1;      /* active */
1896                 }
1897
1898                 /* Set direct probe bits. These may be used both for active
1899                  * scan channels (probes gets sent right away),
1900                  * or for passive channels (probes get se sent only after
1901                  * hearing clear Rx packet).*/
1902                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1903                         if (n_probes)
1904                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1905                 } else {
1906                         /* uCode v1 does not allow setting direct probe bits on
1907                          * passive channel. */
1908                         if ((scan_ch->type & 1) && n_probes)
1909                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1910                 }
1911
1912                 /* Set txpower levels to defaults */
1913                 scan_ch->tpc.dsp_atten = 110;
1914                 /* scan_pwr_info->tpc.dsp_atten; */
1915
1916                 /*scan_pwr_info->tpc.tx_gain; */
1917                 if (band == IEEE80211_BAND_5GHZ)
1918                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1919                 else {
1920                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1921                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1922                          * power level:
1923                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1924                          */
1925                 }
1926
1927                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1928                                scan_ch->channel,
1929                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1930                                (scan_ch->type & 1) ?
1931                                active_dwell : passive_dwell);
1932
1933                 scan_ch++;
1934                 added++;
1935         }
1936
1937         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1938         return added;
1939 }
1940
1941 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1942                               struct ieee80211_rate *rates)
1943 {
1944         int i;
1945
1946         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1947                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1948                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1949                 rates[i].hw_value_short = i;
1950                 rates[i].flags = 0;
1951                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1952                         /*
1953                          * If CCK != 1M then set short preamble rate flag.
1954                          */
1955                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1956                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1957                 }
1958         }
1959 }
1960
1961 /******************************************************************************
1962  *
1963  * uCode download functions
1964  *
1965  ******************************************************************************/
1966
1967 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1968 {
1969         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1970         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1971         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1972         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1973         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1974         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1975 }
1976
1977 /**
1978  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1979  *     looking at all data.
1980  */
1981 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1982 {
1983         u32 val;
1984         u32 save_len = len;
1985         int rc = 0;
1986         u32 errcnt;
1987
1988         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1989
1990         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1991                                IWL39_RTC_INST_LOWER_BOUND);
1992
1993         errcnt = 0;
1994         for (; len > 0; len -= sizeof(u32), image++) {
1995                 /* read data comes through single port, auto-incr addr */
1996                 /* NOTE: Use the debugless read so we don't flood kernel log
1997                  * if IWL_DL_IO is set */
1998                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1999                 if (val != le32_to_cpu(*image)) {
2000                         IWL_ERR(priv, "uCode INST section is invalid at "
2001                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2002                                   save_len - len, val, le32_to_cpu(*image));
2003                         rc = -EIO;
2004                         errcnt++;
2005                         if (errcnt >= 20)
2006                                 break;
2007                 }
2008         }
2009
2010
2011         if (!errcnt)
2012                 IWL_DEBUG_INFO(priv,
2013                         "ucode image in INSTRUCTION memory is good\n");
2014
2015         return rc;
2016 }
2017
2018
2019 /**
2020  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2021  *   using sample data 100 bytes apart.  If these sample points are good,
2022  *   it's a pretty good bet that everything between them is good, too.
2023  */
2024 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2025 {
2026         u32 val;
2027         int rc = 0;
2028         u32 errcnt = 0;
2029         u32 i;
2030
2031         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2032
2033         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2034                 /* read data comes through single port, auto-incr addr */
2035                 /* NOTE: Use the debugless read so we don't flood kernel log
2036                  * if IWL_DL_IO is set */
2037                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2038                         i + IWL39_RTC_INST_LOWER_BOUND);
2039                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2040                 if (val != le32_to_cpu(*image)) {
2041 #if 0 /* Enable this if you want to see details */
2042                         IWL_ERR(priv, "uCode INST section is invalid at "
2043                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2044                                   i, val, *image);
2045 #endif
2046                         rc = -EIO;
2047                         errcnt++;
2048                         if (errcnt >= 3)
2049                                 break;
2050                 }
2051         }
2052
2053         return rc;
2054 }
2055
2056
2057 /**
2058  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2059  *    and verify its contents
2060  */
2061 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2062 {
2063         __le32 *image;
2064         u32 len;
2065         int rc = 0;
2066
2067         /* Try bootstrap */
2068         image = (__le32 *)priv->ucode_boot.v_addr;
2069         len = priv->ucode_boot.len;
2070         rc = iwl3945_verify_inst_sparse(priv, image, len);
2071         if (rc == 0) {
2072                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2073                 return 0;
2074         }
2075
2076         /* Try initialize */
2077         image = (__le32 *)priv->ucode_init.v_addr;
2078         len = priv->ucode_init.len;
2079         rc = iwl3945_verify_inst_sparse(priv, image, len);
2080         if (rc == 0) {
2081                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2082                 return 0;
2083         }
2084
2085         /* Try runtime/protocol */
2086         image = (__le32 *)priv->ucode_code.v_addr;
2087         len = priv->ucode_code.len;
2088         rc = iwl3945_verify_inst_sparse(priv, image, len);
2089         if (rc == 0) {
2090                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2091                 return 0;
2092         }
2093
2094         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2095
2096         /* Since nothing seems to match, show first several data entries in
2097          * instruction SRAM, so maybe visual inspection will give a clue.
2098          * Selection of bootstrap image (vs. other images) is arbitrary. */
2099         image = (__le32 *)priv->ucode_boot.v_addr;
2100         len = priv->ucode_boot.len;
2101         rc = iwl3945_verify_inst_full(priv, image, len);
2102
2103         return rc;
2104 }
2105
2106 static void iwl3945_nic_start(struct iwl_priv *priv)
2107 {
2108         /* Remove all resets to allow NIC to operate */
2109         iwl_write32(priv, CSR_RESET, 0);
2110 }
2111
2112 /**
2113  * iwl3945_read_ucode - Read uCode images from disk file.
2114  *
2115  * Copy into buffers for card to fetch via bus-mastering
2116  */
2117 static int iwl3945_read_ucode(struct iwl_priv *priv)
2118 {
2119         const struct iwl_ucode_header *ucode;
2120         int ret = -EINVAL, index;
2121         const struct firmware *ucode_raw;
2122         /* firmware file name contains uCode/driver compatibility version */
2123         const char *name_pre = priv->cfg->fw_name_pre;
2124         const unsigned int api_max = priv->cfg->ucode_api_max;
2125         const unsigned int api_min = priv->cfg->ucode_api_min;
2126         char buf[25];
2127         u8 *src;
2128         size_t len;
2129         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2130
2131         /* Ask kernel firmware_class module to get the boot firmware off disk.
2132          * request_firmware() is synchronous, file is in memory on return. */
2133         for (index = api_max; index >= api_min; index--) {
2134                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2135                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2136                 if (ret < 0) {
2137                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2138                                   buf, ret);
2139                         if (ret == -ENOENT)
2140                                 continue;
2141                         else
2142                                 goto error;
2143                 } else {
2144                         if (index < api_max)
2145                                 IWL_ERR(priv, "Loaded firmware %s, "
2146                                         "which is deprecated. "
2147                                         " Please use API v%u instead.\n",
2148                                           buf, api_max);
2149                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2150                                        "(%zd bytes) from disk\n",
2151                                        buf, ucode_raw->size);
2152                         break;
2153                 }
2154         }
2155
2156         if (ret < 0)
2157                 goto error;
2158
2159         /* Make sure that we got at least our header! */
2160         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2161                 IWL_ERR(priv, "File size way too small!\n");
2162                 ret = -EINVAL;
2163                 goto err_release;
2164         }
2165
2166         /* Data from ucode file:  header followed by uCode images */
2167         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2168
2169         priv->ucode_ver = le32_to_cpu(ucode->ver);
2170         api_ver = IWL_UCODE_API(priv->ucode_ver);
2171         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2172         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2173         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2174         init_data_size =
2175                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2176         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2177         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2178
2179         /* api_ver should match the api version forming part of the
2180          * firmware filename ... but we don't check for that and only rely
2181          * on the API version read from firmware header from here on forward */
2182
2183         if (api_ver < api_min || api_ver > api_max) {
2184                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2185                           "Driver supports v%u, firmware is v%u.\n",
2186                           api_max, api_ver);
2187                 priv->ucode_ver = 0;
2188                 ret = -EINVAL;
2189                 goto err_release;
2190         }
2191         if (api_ver != api_max)
2192                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2193                           "got %u. New firmware can be obtained "
2194                           "from http://www.intellinuxwireless.org.\n",
2195                           api_max, api_ver);
2196
2197         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2198                 IWL_UCODE_MAJOR(priv->ucode_ver),
2199                 IWL_UCODE_MINOR(priv->ucode_ver),
2200                 IWL_UCODE_API(priv->ucode_ver),
2201                 IWL_UCODE_SERIAL(priv->ucode_ver));
2202
2203         snprintf(priv->hw->wiphy->fw_version,
2204                  sizeof(priv->hw->wiphy->fw_version),
2205                  "%u.%u.%u.%u",
2206                  IWL_UCODE_MAJOR(priv->ucode_ver),
2207                  IWL_UCODE_MINOR(priv->ucode_ver),
2208                  IWL_UCODE_API(priv->ucode_ver),
2209                  IWL_UCODE_SERIAL(priv->ucode_ver));
2210
2211         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2212                        priv->ucode_ver);
2213         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2214                        inst_size);
2215         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2216                        data_size);
2217         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2218                        init_size);
2219         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2220                        init_data_size);
2221         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2222                        boot_size);
2223
2224
2225         /* Verify size of file vs. image size info in file's header */
2226         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2227                 inst_size + data_size + init_size +
2228                 init_data_size + boot_size) {
2229
2230                 IWL_DEBUG_INFO(priv,
2231                         "uCode file size %zd does not match expected size\n",
2232                         ucode_raw->size);
2233                 ret = -EINVAL;
2234                 goto err_release;
2235         }
2236
2237         /* Verify that uCode images will fit in card's SRAM */
2238         if (inst_size > IWL39_MAX_INST_SIZE) {
2239                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2240                                inst_size);
2241                 ret = -EINVAL;
2242                 goto err_release;
2243         }
2244
2245         if (data_size > IWL39_MAX_DATA_SIZE) {
2246                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2247                                data_size);
2248                 ret = -EINVAL;
2249                 goto err_release;
2250         }
2251         if (init_size > IWL39_MAX_INST_SIZE) {
2252                 IWL_DEBUG_INFO(priv,
2253                                 "uCode init instr len %d too large to fit in\n",
2254                                 init_size);
2255                 ret = -EINVAL;
2256                 goto err_release;
2257         }
2258         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2259                 IWL_DEBUG_INFO(priv,
2260                                 "uCode init data len %d too large to fit in\n",
2261                                 init_data_size);
2262                 ret = -EINVAL;
2263                 goto err_release;
2264         }
2265         if (boot_size > IWL39_MAX_BSM_SIZE) {
2266                 IWL_DEBUG_INFO(priv,
2267                                 "uCode boot instr len %d too large to fit in\n",
2268                                 boot_size);
2269                 ret = -EINVAL;
2270                 goto err_release;
2271         }
2272
2273         /* Allocate ucode buffers for card's bus-master loading ... */
2274
2275         /* Runtime instructions and 2 copies of data:
2276          * 1) unmodified from disk
2277          * 2) backup cache for save/restore during power-downs */
2278         priv->ucode_code.len = inst_size;
2279         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2280
2281         priv->ucode_data.len = data_size;
2282         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2283
2284         priv->ucode_data_backup.len = data_size;
2285         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2286
2287         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2288             !priv->ucode_data_backup.v_addr)
2289                 goto err_pci_alloc;
2290
2291         /* Initialization instructions and data */
2292         if (init_size && init_data_size) {
2293                 priv->ucode_init.len = init_size;
2294                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2295
2296                 priv->ucode_init_data.len = init_data_size;
2297                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2298
2299                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2300                         goto err_pci_alloc;
2301         }
2302
2303         /* Bootstrap (instructions only, no data) */
2304         if (boot_size) {
2305                 priv->ucode_boot.len = boot_size;
2306                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2307
2308                 if (!priv->ucode_boot.v_addr)
2309                         goto err_pci_alloc;
2310         }
2311
2312         /* Copy images into buffers for card's bus-master reads ... */
2313
2314         /* Runtime instructions (first block of data in file) */
2315         len = inst_size;
2316         IWL_DEBUG_INFO(priv,
2317                 "Copying (but not loading) uCode instr len %zd\n", len);
2318         memcpy(priv->ucode_code.v_addr, src, len);
2319         src += len;
2320
2321         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2322                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2323
2324         /* Runtime data (2nd block)
2325          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2326         len = data_size;
2327         IWL_DEBUG_INFO(priv,
2328                 "Copying (but not loading) uCode data len %zd\n", len);
2329         memcpy(priv->ucode_data.v_addr, src, len);
2330         memcpy(priv->ucode_data_backup.v_addr, src, len);
2331         src += len;
2332
2333         /* Initialization instructions (3rd block) */
2334         if (init_size) {
2335                 len = init_size;
2336                 IWL_DEBUG_INFO(priv,
2337                         "Copying (but not loading) init instr len %zd\n", len);
2338                 memcpy(priv->ucode_init.v_addr, src, len);
2339                 src += len;
2340         }
2341
2342         /* Initialization data (4th block) */
2343         if (init_data_size) {
2344                 len = init_data_size;
2345                 IWL_DEBUG_INFO(priv,
2346                         "Copying (but not loading) init data len %zd\n", len);
2347                 memcpy(priv->ucode_init_data.v_addr, src, len);
2348                 src += len;
2349         }
2350
2351         /* Bootstrap instructions (5th block) */
2352         len = boot_size;
2353         IWL_DEBUG_INFO(priv,
2354                 "Copying (but not loading) boot instr len %zd\n", len);
2355         memcpy(priv->ucode_boot.v_addr, src, len);
2356
2357         /* We have our copies now, allow OS release its copies */
2358         release_firmware(ucode_raw);
2359         return 0;
2360
2361  err_pci_alloc:
2362         IWL_ERR(priv, "failed to allocate pci memory\n");
2363         ret = -ENOMEM;
2364         iwl3945_dealloc_ucode_pci(priv);
2365
2366  err_release:
2367         release_firmware(ucode_raw);
2368
2369  error:
2370         return ret;
2371 }
2372
2373
2374 /**
2375  * iwl3945_set_ucode_ptrs - Set uCode address location
2376  *
2377  * Tell initialization uCode where to find runtime uCode.
2378  *
2379  * BSM registers initially contain pointers to initialization uCode.
2380  * We need to replace them to load runtime uCode inst and data,
2381  * and to save runtime data when powering down.
2382  */
2383 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2384 {
2385         dma_addr_t pinst;
2386         dma_addr_t pdata;
2387
2388         /* bits 31:0 for 3945 */
2389         pinst = priv->ucode_code.p_addr;
2390         pdata = priv->ucode_data_backup.p_addr;
2391
2392         /* Tell bootstrap uCode where to find image to load */
2393         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2394         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2395         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2396                                  priv->ucode_data.len);
2397
2398         /* Inst byte count must be last to set up, bit 31 signals uCode
2399          *   that all new ptr/size info is in place */
2400         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2401                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2402
2403         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2404
2405         return 0;
2406 }
2407
2408 /**
2409  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2410  *
2411  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2412  *
2413  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2414  */
2415 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2416 {
2417         /* Check alive response for "valid" sign from uCode */
2418         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2419                 /* We had an error bringing up the hardware, so take it
2420                  * all the way back down so we can try again */
2421                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2422                 goto restart;
2423         }
2424
2425         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2426          * This is a paranoid check, because we would not have gotten the
2427          * "initialize" alive if code weren't properly loaded.  */
2428         if (iwl3945_verify_ucode(priv)) {
2429                 /* Runtime instruction load was bad;
2430                  * take it all the way back down so we can try again */
2431                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2432                 goto restart;
2433         }
2434
2435         /* Send pointers to protocol/runtime uCode image ... init code will
2436          * load and launch runtime uCode, which will send us another "Alive"
2437          * notification. */
2438         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2439         if (iwl3945_set_ucode_ptrs(priv)) {
2440                 /* Runtime instruction load won't happen;
2441                  * take it all the way back down so we can try again */
2442                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2443                 goto restart;
2444         }
2445         return;
2446
2447  restart:
2448         queue_work(priv->workqueue, &priv->restart);
2449 }
2450
2451 /**
2452  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2453  *                   from protocol/runtime uCode (initialization uCode's
2454  *                   Alive gets handled by iwl3945_init_alive_start()).
2455  */
2456 static void iwl3945_alive_start(struct iwl_priv *priv)
2457 {
2458         int thermal_spin = 0;
2459         u32 rfkill;
2460
2461         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2462
2463         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2464                 /* We had an error bringing up the hardware, so take it
2465                  * all the way back down so we can try again */
2466                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2467                 goto restart;
2468         }
2469
2470         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2471          * This is a paranoid check, because we would not have gotten the
2472          * "runtime" alive if code weren't properly loaded.  */
2473         if (iwl3945_verify_ucode(priv)) {
2474                 /* Runtime instruction load was bad;
2475                  * take it all the way back down so we can try again */
2476                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2477                 goto restart;
2478         }
2479
2480         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2481         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2482
2483         if (rfkill & 0x1) {
2484                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2485                 /* if RFKILL is not on, then wait for thermal
2486                  * sensor in adapter to kick in */
2487                 while (iwl3945_hw_get_temperature(priv) == 0) {
2488                         thermal_spin++;
2489                         udelay(10);
2490                 }
2491
2492                 if (thermal_spin)
2493                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2494                                        thermal_spin * 10);
2495         } else
2496                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2497
2498         /* After the ALIVE response, we can send commands to 3945 uCode */
2499         set_bit(STATUS_ALIVE, &priv->status);
2500
2501         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2502                 /* Enable timer to monitor the driver queues */
2503                 mod_timer(&priv->monitor_recover,
2504                         jiffies +
2505                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2506         }
2507
2508         if (iwl_is_rfkill(priv))
2509                 return;
2510
2511         ieee80211_wake_queues(priv->hw);
2512
2513         priv->active_rate = IWL_RATES_MASK;
2514
2515         iwl_power_update_mode(priv, true);
2516
2517         if (iwl_is_associated(priv)) {
2518                 struct iwl3945_rxon_cmd *active_rxon =
2519                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2520
2521                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2522                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2523         } else {
2524                 /* Initialize our rx_config data */
2525                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2526         }
2527
2528         /* Configure Bluetooth device coexistence support */
2529         priv->cfg->ops->hcmd->send_bt_config(priv);
2530
2531         /* Configure the adapter for unassociated operation */
2532         iwlcore_commit_rxon(priv);
2533
2534         iwl3945_reg_txpower_periodic(priv);
2535
2536         iwl_leds_init(priv);
2537
2538         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2539         set_bit(STATUS_READY, &priv->status);
2540         wake_up_interruptible(&priv->wait_command_queue);
2541
2542         return;
2543
2544  restart:
2545         queue_work(priv->workqueue, &priv->restart);
2546 }
2547
2548 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2549
2550 static void __iwl3945_down(struct iwl_priv *priv)
2551 {
2552         unsigned long flags;
2553         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2554         struct ieee80211_conf *conf = NULL;
2555
2556         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2557
2558         conf = ieee80211_get_hw_conf(priv->hw);
2559
2560         if (!exit_pending)
2561                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2562
2563         /* Station information will now be cleared in device */
2564         iwl_clear_ucode_stations(priv, true);
2565
2566         /* Unblock any waiting calls */
2567         wake_up_interruptible_all(&priv->wait_command_queue);
2568
2569         /* Wipe out the EXIT_PENDING status bit if we are not actually
2570          * exiting the module */
2571         if (!exit_pending)
2572                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2573
2574         /* stop and reset the on-board processor */
2575         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2576
2577         /* tell the device to stop sending interrupts */
2578         spin_lock_irqsave(&priv->lock, flags);
2579         iwl_disable_interrupts(priv);
2580         spin_unlock_irqrestore(&priv->lock, flags);
2581         iwl_synchronize_irq(priv);
2582
2583         if (priv->mac80211_registered)
2584                 ieee80211_stop_queues(priv->hw);
2585
2586         /* If we have not previously called iwl3945_init() then
2587          * clear all bits but the RF Kill bits and return */
2588         if (!iwl_is_init(priv)) {
2589                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2590                                         STATUS_RF_KILL_HW |
2591                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2592                                         STATUS_GEO_CONFIGURED |
2593                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2594                                         STATUS_EXIT_PENDING;
2595                 goto exit;
2596         }
2597
2598         /* ...otherwise clear out all the status bits but the RF Kill
2599          * bit and continue taking the NIC down. */
2600         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2601                                 STATUS_RF_KILL_HW |
2602                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2603                                 STATUS_GEO_CONFIGURED |
2604                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2605                                 STATUS_FW_ERROR |
2606                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2607                                 STATUS_EXIT_PENDING;
2608
2609         iwl3945_hw_txq_ctx_stop(priv);
2610         iwl3945_hw_rxq_stop(priv);
2611
2612         /* Power-down device's busmaster DMA clocks */
2613         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2614         udelay(5);
2615
2616         /* Stop the device, and put it in low power state */
2617         priv->cfg->ops->lib->apm_ops.stop(priv);
2618
2619  exit:
2620         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2621
2622         if (priv->ibss_beacon)
2623                 dev_kfree_skb(priv->ibss_beacon);
2624         priv->ibss_beacon = NULL;
2625
2626         /* clear out any free frames */
2627         iwl3945_clear_free_frames(priv);
2628 }
2629
2630 static void iwl3945_down(struct iwl_priv *priv)
2631 {
2632         mutex_lock(&priv->mutex);
2633         __iwl3945_down(priv);
2634         mutex_unlock(&priv->mutex);
2635
2636         iwl3945_cancel_deferred_work(priv);
2637 }
2638
2639 #define MAX_HW_RESTARTS 5
2640
2641 static int __iwl3945_up(struct iwl_priv *priv)
2642 {
2643         int rc, i;
2644
2645         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2646                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2647                 return -EIO;
2648         }
2649
2650         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2651                 IWL_ERR(priv, "ucode not available for device bring up\n");
2652                 return -EIO;
2653         }
2654
2655         /* If platform's RF_KILL switch is NOT set to KILL */
2656         if (iwl_read32(priv, CSR_GP_CNTRL) &
2657                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2658                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2659         else {
2660                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2661                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2662                 return -ENODEV;
2663         }
2664
2665         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2666
2667         rc = iwl3945_hw_nic_init(priv);
2668         if (rc) {
2669                 IWL_ERR(priv, "Unable to int nic\n");
2670                 return rc;
2671         }
2672
2673         /* make sure rfkill handshake bits are cleared */
2674         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2675         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2676                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2677
2678         /* clear (again), then enable host interrupts */
2679         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2680         iwl_enable_interrupts(priv);
2681
2682         /* really make sure rfkill handshake bits are cleared */
2683         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2684         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2685
2686         /* Copy original ucode data image from disk into backup cache.
2687          * This will be used to initialize the on-board processor's
2688          * data SRAM for a clean start when the runtime program first loads. */
2689         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2690                priv->ucode_data.len);
2691
2692         /* We return success when we resume from suspend and rf_kill is on. */
2693         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2694                 return 0;
2695
2696         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2697
2698                 /* load bootstrap state machine,
2699                  * load bootstrap program into processor's memory,
2700                  * prepare to load the "initialize" uCode */
2701                 rc = priv->cfg->ops->lib->load_ucode(priv);
2702
2703                 if (rc) {
2704                         IWL_ERR(priv,
2705                                 "Unable to set up bootstrap uCode: %d\n", rc);
2706                         continue;
2707                 }
2708
2709                 /* start card; "initialize" will load runtime ucode */
2710                 iwl3945_nic_start(priv);
2711
2712                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2713
2714                 return 0;
2715         }
2716
2717         set_bit(STATUS_EXIT_PENDING, &priv->status);
2718         __iwl3945_down(priv);
2719         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2720
2721         /* tried to restart and config the device for as long as our
2722          * patience could withstand */
2723         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2724         return -EIO;
2725 }
2726
2727
2728 /*****************************************************************************
2729  *
2730  * Workqueue callbacks
2731  *
2732  *****************************************************************************/
2733
2734 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2735 {
2736         struct iwl_priv *priv =
2737             container_of(data, struct iwl_priv, init_alive_start.work);
2738
2739         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2740                 return;
2741
2742         mutex_lock(&priv->mutex);
2743         iwl3945_init_alive_start(priv);
2744         mutex_unlock(&priv->mutex);
2745 }
2746
2747 static void iwl3945_bg_alive_start(struct work_struct *data)
2748 {
2749         struct iwl_priv *priv =
2750             container_of(data, struct iwl_priv, alive_start.work);
2751
2752         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2753                 return;
2754
2755         mutex_lock(&priv->mutex);
2756         iwl3945_alive_start(priv);
2757         mutex_unlock(&priv->mutex);
2758 }
2759
2760 /*
2761  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2762  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2763  * *is* readable even when device has been SW_RESET into low power mode
2764  * (e.g. during RF KILL).
2765  */
2766 static void iwl3945_rfkill_poll(struct work_struct *data)
2767 {
2768         struct iwl_priv *priv =
2769             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2770         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2771         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2772                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2773
2774         if (new_rfkill != old_rfkill) {
2775                 if (new_rfkill)
2776                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2777                 else
2778                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2779
2780                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2781
2782                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2783                                 new_rfkill ? "disable radio" : "enable radio");
2784         }
2785
2786         /* Keep this running, even if radio now enabled.  This will be
2787          * cancelled in mac_start() if system decides to start again */
2788         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2789                            round_jiffies_relative(2 * HZ));
2790
2791 }
2792
2793 void iwl3945_request_scan(struct iwl_priv *priv)
2794 {
2795         struct iwl_host_cmd cmd = {
2796                 .id = REPLY_SCAN_CMD,
2797                 .len = sizeof(struct iwl3945_scan_cmd),
2798                 .flags = CMD_SIZE_HUGE,
2799         };
2800         struct iwl3945_scan_cmd *scan;
2801         struct ieee80211_conf *conf = NULL;
2802         u8 n_probes = 0;
2803         enum ieee80211_band band;
2804         bool is_active = false;
2805
2806         conf = ieee80211_get_hw_conf(priv->hw);
2807
2808         cancel_delayed_work(&priv->scan_check);
2809
2810         if (!iwl_is_ready(priv)) {
2811                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2812                 goto done;
2813         }
2814
2815         /* Make sure the scan wasn't canceled before this queued work
2816          * was given the chance to run... */
2817         if (!test_bit(STATUS_SCANNING, &priv->status))
2818                 goto done;
2819
2820         /* This should never be called or scheduled if there is currently
2821          * a scan active in the hardware. */
2822         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2823                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2824                                 "Ignoring second request.\n");
2825                 goto done;
2826         }
2827
2828         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2829                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2830                 goto done;
2831         }
2832
2833         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2834                 IWL_DEBUG_HC(priv,
2835                         "Scan request while abort pending. Queuing.\n");
2836                 goto done;
2837         }
2838
2839         if (iwl_is_rfkill(priv)) {
2840                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2841                 goto done;
2842         }
2843
2844         if (!test_bit(STATUS_READY, &priv->status)) {
2845                 IWL_DEBUG_HC(priv,
2846                         "Scan request while uninitialized. Queuing.\n");
2847                 goto done;
2848         }
2849
2850         if (!priv->scan_cmd) {
2851                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2852                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2853                 if (!priv->scan_cmd) {
2854                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2855                         goto done;
2856                 }
2857         }
2858         scan = priv->scan_cmd;
2859         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2860
2861         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2862         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2863
2864         if (iwl_is_associated(priv)) {
2865                 u16 interval = 0;
2866                 u32 extra;
2867                 u32 suspend_time = 100;
2868                 u32 scan_suspend_time = 100;
2869                 unsigned long flags;
2870
2871                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2872
2873                 spin_lock_irqsave(&priv->lock, flags);
2874                 interval = priv->beacon_int;
2875                 spin_unlock_irqrestore(&priv->lock, flags);
2876
2877                 scan->suspend_time = 0;
2878                 scan->max_out_time = cpu_to_le32(200 * 1024);
2879                 if (!interval)
2880                         interval = suspend_time;
2881                 /*
2882                  * suspend time format:
2883                  *  0-19: beacon interval in usec (time before exec.)
2884                  * 20-23: 0
2885                  * 24-31: number of beacons (suspend between channels)
2886                  */
2887
2888                 extra = (suspend_time / interval) << 24;
2889                 scan_suspend_time = 0xFF0FFFFF &
2890                     (extra | ((suspend_time % interval) * 1024));
2891
2892                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2893                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2894                                scan_suspend_time, interval);
2895         }
2896
2897         if (priv->is_internal_short_scan) {
2898                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2899         } else if (priv->scan_request->n_ssids) {
2900                 int i, p = 0;
2901                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2902                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2903                         /* always does wildcard anyway */
2904                         if (!priv->scan_request->ssids[i].ssid_len)
2905                                 continue;
2906                         scan->direct_scan[p].id = WLAN_EID_SSID;
2907                         scan->direct_scan[p].len =
2908                                 priv->scan_request->ssids[i].ssid_len;
2909                         memcpy(scan->direct_scan[p].ssid,
2910                                priv->scan_request->ssids[i].ssid,
2911                                priv->scan_request->ssids[i].ssid_len);
2912                         n_probes++;
2913                         p++;
2914                 }
2915                 is_active = true;
2916         } else
2917                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2918
2919         /* We don't build a direct scan probe request; the uCode will do
2920          * that based on the direct_mask added to each channel entry */
2921         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2922         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2923         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2924
2925         /* flags + rate selection */
2926
2927         switch (priv->scan_band) {
2928         case IEEE80211_BAND_2GHZ:
2929                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2930                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2931                 scan->good_CRC_th = 0;
2932                 band = IEEE80211_BAND_2GHZ;
2933                 break;
2934         case IEEE80211_BAND_5GHZ:
2935                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2936                 /*
2937                  * If active scaning is requested but a certain channel
2938                  * is marked passive, we can do active scanning if we
2939                  * detect transmissions.
2940                  */
2941                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2942                                                 IWL_GOOD_CRC_TH_DISABLED;
2943                 band = IEEE80211_BAND_5GHZ;
2944                 break;
2945         default:
2946                 IWL_WARN(priv, "Invalid scan band\n");
2947                 goto done;
2948         }
2949
2950         if (!priv->is_internal_short_scan) {
2951                 scan->tx_cmd.len = cpu_to_le16(
2952                         iwl_fill_probe_req(priv,
2953                                 (struct ieee80211_mgmt *)scan->data,
2954                                 priv->scan_request->ie,
2955                                 priv->scan_request->ie_len,
2956                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2957         } else {
2958                 scan->tx_cmd.len = cpu_to_le16(
2959                         iwl_fill_probe_req(priv,
2960                                 (struct ieee80211_mgmt *)scan->data,
2961                                 NULL, 0,
2962                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2963         }
2964         /* select Rx antennas */
2965         scan->flags |= iwl3945_get_antenna_flags(priv);
2966
2967         scan->channel_count =
2968                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2969                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2970
2971         if (scan->channel_count == 0) {
2972                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2973                 goto done;
2974         }
2975
2976         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2977             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2978         cmd.data = scan;
2979         scan->len = cpu_to_le16(cmd.len);
2980
2981         set_bit(STATUS_SCAN_HW, &priv->status);
2982         if (iwl_send_cmd_sync(priv, &cmd))
2983                 goto done;
2984
2985         queue_delayed_work(priv->workqueue, &priv->scan_check,
2986                            IWL_SCAN_CHECK_WATCHDOG);
2987
2988         return;
2989
2990  done:
2991         /* can not perform scan make sure we clear scanning
2992          * bits from status so next scan request can be performed.
2993          * if we dont clear scanning status bit here all next scan
2994          * will fail
2995         */
2996         clear_bit(STATUS_SCAN_HW, &priv->status);
2997         clear_bit(STATUS_SCANNING, &priv->status);
2998
2999         /* inform mac80211 scan aborted */
3000         queue_work(priv->workqueue, &priv->scan_completed);
3001 }
3002
3003 static void iwl3945_bg_restart(struct work_struct *data)
3004 {
3005         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3006
3007         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3008                 return;
3009
3010         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3011                 mutex_lock(&priv->mutex);
3012                 priv->vif = NULL;
3013                 priv->is_open = 0;
3014                 mutex_unlock(&priv->mutex);
3015                 iwl3945_down(priv);
3016                 ieee80211_restart_hw(priv->hw);
3017         } else {
3018                 iwl3945_down(priv);
3019
3020                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3021                         return;
3022
3023                 mutex_lock(&priv->mutex);
3024                 __iwl3945_up(priv);
3025                 mutex_unlock(&priv->mutex);
3026         }
3027 }
3028
3029 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3030 {
3031         struct iwl_priv *priv =
3032             container_of(data, struct iwl_priv, rx_replenish);
3033
3034         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3035                 return;
3036
3037         mutex_lock(&priv->mutex);
3038         iwl3945_rx_replenish(priv);
3039         mutex_unlock(&priv->mutex);
3040 }
3041
3042 void iwl3945_post_associate(struct iwl_priv *priv)
3043 {
3044         int rc = 0;
3045         struct ieee80211_conf *conf = NULL;
3046
3047         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3048                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3049                 return;
3050         }
3051
3052
3053         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3054                         priv->assoc_id, priv->active_rxon.bssid_addr);
3055
3056         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3057                 return;
3058
3059         if (!priv->vif || !priv->is_open)
3060                 return;
3061
3062         iwl_scan_cancel_timeout(priv, 200);
3063
3064         conf = ieee80211_get_hw_conf(priv->hw);
3065
3066         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3067         iwlcore_commit_rxon(priv);
3068
3069         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3070         iwl_setup_rxon_timing(priv);
3071         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3072                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3073         if (rc)
3074                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3075                             "Attempting to continue.\n");
3076
3077         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3078
3079         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3080
3081         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3082                         priv->assoc_id, priv->beacon_int);
3083
3084         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3085                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3086         else
3087                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3088
3089         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3090                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3091                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3092                 else
3093                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3094
3095                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3096                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3097
3098         }
3099
3100         iwlcore_commit_rxon(priv);
3101
3102         switch (priv->iw_mode) {
3103         case NL80211_IFTYPE_STATION:
3104                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3105                 break;
3106
3107         case NL80211_IFTYPE_ADHOC:
3108
3109                 priv->assoc_id = 1;
3110                 iwl_add_local_station(priv, priv->bssid, false);
3111                 iwl3945_sync_sta(priv, IWL_STA_ID,
3112                                 (priv->band == IEEE80211_BAND_5GHZ) ?
3113                                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3114                                  CMD_ASYNC);
3115                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3116
3117                 iwl3945_send_beacon_cmd(priv);
3118
3119                 break;
3120
3121         default:
3122                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3123                            __func__, priv->iw_mode);
3124                 break;
3125         }
3126 }
3127
3128 /*****************************************************************************
3129  *
3130  * mac80211 entry point functions
3131  *
3132  *****************************************************************************/
3133
3134 #define UCODE_READY_TIMEOUT     (2 * HZ)
3135
3136 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3137 {
3138         struct iwl_priv *priv = hw->priv;
3139         int ret;
3140
3141         IWL_DEBUG_MAC80211(priv, "enter\n");
3142
3143         /* we should be verifying the device is ready to be opened */
3144         mutex_lock(&priv->mutex);
3145
3146         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3147          * ucode filename and max sizes are card-specific. */
3148
3149         if (!priv->ucode_code.len) {
3150                 ret = iwl3945_read_ucode(priv);
3151                 if (ret) {
3152                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3153                         mutex_unlock(&priv->mutex);
3154                         goto out_release_irq;
3155                 }
3156         }
3157
3158         ret = __iwl3945_up(priv);
3159
3160         mutex_unlock(&priv->mutex);
3161
3162         if (ret)
3163                 goto out_release_irq;
3164
3165         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3166
3167         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3168          * mac80211 will not be run successfully. */
3169         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3170                         test_bit(STATUS_READY, &priv->status),
3171                         UCODE_READY_TIMEOUT);
3172         if (!ret) {
3173                 if (!test_bit(STATUS_READY, &priv->status)) {
3174                         IWL_ERR(priv,
3175                                 "Wait for START_ALIVE timeout after %dms.\n",
3176                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3177                         ret = -ETIMEDOUT;
3178                         goto out_release_irq;
3179                 }
3180         }
3181
3182         /* ucode is running and will send rfkill notifications,
3183          * no need to poll the killswitch state anymore */
3184         cancel_delayed_work(&priv->_3945.rfkill_poll);
3185
3186         iwl_led_start(priv);
3187
3188         priv->is_open = 1;
3189         IWL_DEBUG_MAC80211(priv, "leave\n");
3190         return 0;
3191
3192 out_release_irq:
3193         priv->is_open = 0;
3194         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3195         return ret;
3196 }
3197
3198 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3199 {
3200         struct iwl_priv *priv = hw->priv;
3201
3202         IWL_DEBUG_MAC80211(priv, "enter\n");
3203
3204         if (!priv->is_open) {
3205                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3206                 return;
3207         }
3208
3209         priv->is_open = 0;
3210
3211         if (iwl_is_ready_rf(priv)) {
3212                 /* stop mac, cancel any scan request and clear
3213                  * RXON_FILTER_ASSOC_MSK BIT
3214                  */
3215                 mutex_lock(&priv->mutex);
3216                 iwl_scan_cancel_timeout(priv, 100);
3217                 mutex_unlock(&priv->mutex);
3218         }
3219
3220         iwl3945_down(priv);
3221
3222         flush_workqueue(priv->workqueue);
3223
3224         /* start polling the killswitch state again */
3225         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3226                            round_jiffies_relative(2 * HZ));
3227
3228         IWL_DEBUG_MAC80211(priv, "leave\n");
3229 }
3230
3231 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3232 {
3233         struct iwl_priv *priv = hw->priv;
3234
3235         IWL_DEBUG_MAC80211(priv, "enter\n");
3236
3237         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3238                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3239
3240         if (iwl3945_tx_skb(priv, skb))
3241                 dev_kfree_skb_any(skb);
3242
3243         IWL_DEBUG_MAC80211(priv, "leave\n");
3244         return NETDEV_TX_OK;
3245 }
3246
3247 void iwl3945_config_ap(struct iwl_priv *priv)
3248 {
3249         int rc = 0;
3250
3251         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3252                 return;
3253
3254         /* The following should be done only at AP bring up */
3255         if (!(iwl_is_associated(priv))) {
3256
3257                 /* RXON - unassoc (to set timing command) */
3258                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3259                 iwlcore_commit_rxon(priv);
3260
3261                 /* RXON Timing */
3262                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3263                 iwl_setup_rxon_timing(priv);
3264                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3265                                       sizeof(priv->rxon_timing),
3266                                       &priv->rxon_timing);
3267                 if (rc)
3268                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3269                                         "Attempting to continue.\n");
3270
3271                 /* FIXME: what should be the assoc_id for AP? */
3272                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3273                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3274                         priv->staging_rxon.flags |=
3275                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3276                 else
3277                         priv->staging_rxon.flags &=
3278                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3279
3280                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3281                         if (priv->assoc_capability &
3282                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3283                                 priv->staging_rxon.flags |=
3284                                         RXON_FLG_SHORT_SLOT_MSK;
3285                         else
3286                                 priv->staging_rxon.flags &=
3287                                         ~RXON_FLG_SHORT_SLOT_MSK;
3288
3289                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3290                                 priv->staging_rxon.flags &=
3291                                         ~RXON_FLG_SHORT_SLOT_MSK;
3292                 }
3293                 /* restore RXON assoc */
3294                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3295                 iwlcore_commit_rxon(priv);
3296                 iwl_add_local_station(priv, iwl_bcast_addr, false);
3297         }
3298         iwl3945_send_beacon_cmd(priv);
3299
3300         /* FIXME - we need to add code here to detect a totally new
3301          * configuration, reset the AP, unassoc, rxon timing, assoc,
3302          * clear sta table, add BCAST sta... */
3303 }
3304
3305 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3306                                struct ieee80211_vif *vif,
3307                                struct ieee80211_sta *sta,
3308                                struct ieee80211_key_conf *key)
3309 {
3310         struct iwl_priv *priv = hw->priv;
3311         const u8 *addr;
3312         int ret = 0;
3313         u8 sta_id = IWL_INVALID_STATION;
3314         u8 static_key;
3315
3316         IWL_DEBUG_MAC80211(priv, "enter\n");
3317
3318         if (iwl3945_mod_params.sw_crypto) {
3319                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3320                 return -EOPNOTSUPP;
3321         }
3322
3323         addr = sta ? sta->addr : iwl_bcast_addr;
3324         static_key = !iwl_is_associated(priv);
3325
3326         if (!static_key) {
3327                 sta_id = iwl_find_station(priv, addr);
3328                 if (sta_id == IWL_INVALID_STATION) {
3329                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3330                                             addr);
3331                         return -EINVAL;
3332                 }
3333         }
3334
3335         mutex_lock(&priv->mutex);
3336         iwl_scan_cancel_timeout(priv, 100);
3337
3338         switch (cmd) {
3339         case SET_KEY:
3340                 if (static_key)
3341                         ret = iwl3945_set_static_key(priv, key);
3342                 else
3343                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3344                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3345                 break;
3346         case DISABLE_KEY:
3347                 if (static_key)
3348                         ret = iwl3945_remove_static_key(priv);
3349                 else
3350                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3351                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3352                 break;
3353         default:
3354                 ret = -EINVAL;
3355         }
3356
3357         mutex_unlock(&priv->mutex);
3358         IWL_DEBUG_MAC80211(priv, "leave\n");
3359
3360         return ret;
3361 }
3362
3363 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3364                                struct ieee80211_vif *vif,
3365                                struct ieee80211_sta *sta)
3366 {
3367         struct iwl_priv *priv = hw->priv;
3368         int ret;
3369         bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
3370         u8 sta_id;
3371
3372         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3373                         sta->addr);
3374
3375         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3376                                      &sta_id);
3377         if (ret) {
3378                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3379                         sta->addr, ret);
3380                 /* Should we return success if return code is EEXIST ? */
3381                 return ret;
3382         }
3383
3384         /* Initialize rate scaling */
3385         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3386                        sta->addr);
3387         iwl3945_rs_rate_init(priv, sta, sta_id);
3388
3389         return 0;
3390
3391
3392
3393         return ret;
3394 }
3395 /*****************************************************************************
3396  *
3397  * sysfs attributes
3398  *
3399  *****************************************************************************/
3400
3401 #ifdef CONFIG_IWLWIFI_DEBUG
3402
3403 /*
3404  * The following adds a new attribute to the sysfs representation
3405  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3406  * used for controlling the debug level.
3407  *
3408  * See the level definitions in iwl for details.
3409  *
3410  * The debug_level being managed using sysfs below is a per device debug
3411  * level that is used instead of the global debug level if it (the per
3412  * device debug level) is set.
3413  */
3414 static ssize_t show_debug_level(struct device *d,
3415                                 struct device_attribute *attr, char *buf)
3416 {
3417         struct iwl_priv *priv = dev_get_drvdata(d);
3418         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3419 }
3420 static ssize_t store_debug_level(struct device *d,
3421                                 struct device_attribute *attr,
3422                                  const char *buf, size_t count)
3423 {
3424         struct iwl_priv *priv = dev_get_drvdata(d);
3425         unsigned long val;
3426         int ret;
3427
3428         ret = strict_strtoul(buf, 0, &val);
3429         if (ret)
3430                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3431         else {
3432                 priv->debug_level = val;
3433                 if (iwl_alloc_traffic_mem(priv))
3434                         IWL_ERR(priv,
3435                                 "Not enough memory to generate traffic log\n");
3436         }
3437         return strnlen(buf, count);
3438 }
3439
3440 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3441                         show_debug_level, store_debug_level);
3442
3443 #endif /* CONFIG_IWLWIFI_DEBUG */
3444
3445 static ssize_t show_temperature(struct device *d,
3446                                 struct device_attribute *attr, char *buf)
3447 {
3448         struct iwl_priv *priv = dev_get_drvdata(d);
3449
3450         if (!iwl_is_alive(priv))
3451                 return -EAGAIN;
3452
3453         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3454 }
3455
3456 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3457
3458 static ssize_t show_tx_power(struct device *d,
3459                              struct device_attribute *attr, char *buf)
3460 {
3461         struct iwl_priv *priv = dev_get_drvdata(d);
3462         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3463 }
3464
3465 static ssize_t store_tx_power(struct device *d,
3466                               struct device_attribute *attr,
3467                               const char *buf, size_t count)
3468 {
3469         struct iwl_priv *priv = dev_get_drvdata(d);
3470         char *p = (char *)buf;
3471         u32 val;
3472
3473         val = simple_strtoul(p, &p, 10);
3474         if (p == buf)
3475                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3476         else
3477                 iwl3945_hw_reg_set_txpower(priv, val);
3478
3479         return count;
3480 }
3481
3482 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3483
3484 static ssize_t show_flags(struct device *d,
3485                           struct device_attribute *attr, char *buf)
3486 {
3487         struct iwl_priv *priv = dev_get_drvdata(d);
3488
3489         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3490 }
3491
3492 static ssize_t store_flags(struct device *d,
3493                            struct device_attribute *attr,
3494                            const char *buf, size_t count)
3495 {
3496         struct iwl_priv *priv = dev_get_drvdata(d);
3497         u32 flags = simple_strtoul(buf, NULL, 0);
3498
3499         mutex_lock(&priv->mutex);
3500         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3501                 /* Cancel any currently running scans... */
3502                 if (iwl_scan_cancel_timeout(priv, 100))
3503                         IWL_WARN(priv, "Could not cancel scan.\n");
3504                 else {
3505                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3506                                        flags);
3507                         priv->staging_rxon.flags = cpu_to_le32(flags);
3508                         iwlcore_commit_rxon(priv);
3509                 }
3510         }
3511         mutex_unlock(&priv->mutex);
3512
3513         return count;
3514 }
3515
3516 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3517
3518 static ssize_t show_filter_flags(struct device *d,
3519                                  struct device_attribute *attr, char *buf)
3520 {
3521         struct iwl_priv *priv = dev_get_drvdata(d);
3522
3523         return sprintf(buf, "0x%04X\n",
3524                 le32_to_cpu(priv->active_rxon.filter_flags));
3525 }
3526
3527 static ssize_t store_filter_flags(struct device *d,
3528                                   struct device_attribute *attr,
3529                                   const char *buf, size_t count)
3530 {
3531         struct iwl_priv *priv = dev_get_drvdata(d);
3532         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3533
3534         mutex_lock(&priv->mutex);
3535         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3536                 /* Cancel any currently running scans... */
3537                 if (iwl_scan_cancel_timeout(priv, 100))
3538                         IWL_WARN(priv, "Could not cancel scan.\n");
3539                 else {
3540                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3541                                        "0x%04X\n", filter_flags);
3542                         priv->staging_rxon.filter_flags =
3543                                 cpu_to_le32(filter_flags);
3544                         iwlcore_commit_rxon(priv);
3545                 }
3546         }
3547         mutex_unlock(&priv->mutex);
3548
3549         return count;
3550 }
3551
3552 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3553                    store_filter_flags);
3554
3555 static ssize_t show_measurement(struct device *d,
3556                                 struct device_attribute *attr, char *buf)
3557 {
3558         struct iwl_priv *priv = dev_get_drvdata(d);
3559         struct iwl_spectrum_notification measure_report;
3560         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3561         u8 *data = (u8 *)&measure_report;
3562         unsigned long flags;
3563
3564         spin_lock_irqsave(&priv->lock, flags);
3565         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3566                 spin_unlock_irqrestore(&priv->lock, flags);
3567                 return 0;
3568         }
3569         memcpy(&measure_report, &priv->measure_report, size);
3570         priv->measurement_status = 0;
3571         spin_unlock_irqrestore(&priv->lock, flags);
3572
3573         while (size && (PAGE_SIZE - len)) {
3574                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3575                                    PAGE_SIZE - len, 1);
3576                 len = strlen(buf);
3577                 if (PAGE_SIZE - len)
3578                         buf[len++] = '\n';
3579
3580                 ofs += 16;
3581                 size -= min(size, 16U);
3582         }
3583
3584         return len;
3585 }
3586
3587 static ssize_t store_measurement(struct device *d,
3588                                  struct device_attribute *attr,
3589                                  const char *buf, size_t count)
3590 {
3591         struct iwl_priv *priv = dev_get_drvdata(d);
3592         struct ieee80211_measurement_params params = {
3593                 .channel = le16_to_cpu(priv->active_rxon.channel),
3594                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3595                 .duration = cpu_to_le16(1),
3596         };
3597         u8 type = IWL_MEASURE_BASIC;
3598         u8 buffer[32];
3599         u8 channel;
3600
3601         if (count) {
3602                 char *p = buffer;
3603                 strncpy(buffer, buf, min(sizeof(buffer), count));
3604                 channel = simple_strtoul(p, NULL, 0);
3605                 if (channel)
3606                         params.channel = channel;
3607
3608                 p = buffer;
3609                 while (*p && *p != ' ')
3610                         p++;
3611                 if (*p)
3612                         type = simple_strtoul(p + 1, NULL, 0);
3613         }
3614
3615         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3616                        "channel %d (for '%s')\n", type, params.channel, buf);
3617         iwl3945_get_measurement(priv, &params, type);
3618
3619         return count;
3620 }
3621
3622 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3623                    show_measurement, store_measurement);
3624
3625 static ssize_t store_retry_rate(struct device *d,
3626                                 struct device_attribute *attr,
3627                                 const char *buf, size_t count)
3628 {
3629         struct iwl_priv *priv = dev_get_drvdata(d);
3630
3631         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3632         if (priv->retry_rate <= 0)
3633                 priv->retry_rate = 1;
3634
3635         return count;
3636 }
3637
3638 static ssize_t show_retry_rate(struct device *d,
3639                                struct device_attribute *attr, char *buf)
3640 {
3641         struct iwl_priv *priv = dev_get_drvdata(d);
3642         return sprintf(buf, "%d", priv->retry_rate);
3643 }
3644
3645 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3646                    store_retry_rate);
3647
3648
3649 static ssize_t show_channels(struct device *d,
3650                              struct device_attribute *attr, char *buf)
3651 {
3652         /* all this shit doesn't belong into sysfs anyway */
3653         return 0;
3654 }
3655
3656 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3657
3658 static ssize_t show_antenna(struct device *d,
3659                             struct device_attribute *attr, char *buf)
3660 {
3661         struct iwl_priv *priv = dev_get_drvdata(d);
3662
3663         if (!iwl_is_alive(priv))
3664                 return -EAGAIN;
3665
3666         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3667 }
3668
3669 static ssize_t store_antenna(struct device *d,
3670                              struct device_attribute *attr,
3671                              const char *buf, size_t count)
3672 {
3673         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3674         int ant;
3675
3676         if (count == 0)
3677                 return 0;
3678
3679         if (sscanf(buf, "%1i", &ant) != 1) {
3680                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3681                 return count;
3682         }
3683
3684         if ((ant >= 0) && (ant <= 2)) {
3685                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3686                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3687         } else
3688                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3689
3690
3691         return count;
3692 }
3693
3694 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3695
3696 static ssize_t show_status(struct device *d,
3697                            struct device_attribute *attr, char *buf)
3698 {
3699         struct iwl_priv *priv = dev_get_drvdata(d);
3700         if (!iwl_is_alive(priv))
3701                 return -EAGAIN;
3702         return sprintf(buf, "0x%08x\n", (int)priv->status);
3703 }
3704
3705 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3706
3707 static ssize_t dump_error_log(struct device *d,
3708                               struct device_attribute *attr,
3709                               const char *buf, size_t count)
3710 {
3711         struct iwl_priv *priv = dev_get_drvdata(d);
3712         char *p = (char *)buf;
3713
3714         if (p[0] == '1')
3715                 iwl3945_dump_nic_error_log(priv);
3716
3717         return strnlen(buf, count);
3718 }
3719
3720 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3721
3722 /*****************************************************************************
3723  *
3724  * driver setup and tear down
3725  *
3726  *****************************************************************************/
3727
3728 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3729 {
3730         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3731
3732         init_waitqueue_head(&priv->wait_command_queue);
3733
3734         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3735         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3736         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3737         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3738         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3739         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3740         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3741         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3742         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3743
3744         iwl3945_hw_setup_deferred_work(priv);
3745
3746         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3747                 init_timer(&priv->monitor_recover);
3748                 priv->monitor_recover.data = (unsigned long)priv;
3749                 priv->monitor_recover.function =
3750                         priv->cfg->ops->lib->recover_from_tx_stall;
3751         }
3752
3753         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3754                      iwl3945_irq_tasklet, (unsigned long)priv);
3755 }
3756
3757 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3758 {
3759         iwl3945_hw_cancel_deferred_work(priv);
3760
3761         cancel_delayed_work_sync(&priv->init_alive_start);
3762         cancel_delayed_work(&priv->scan_check);
3763         cancel_delayed_work(&priv->alive_start);
3764         cancel_work_sync(&priv->beacon_update);
3765         if (priv->cfg->ops->lib->recover_from_tx_stall)
3766                 del_timer_sync(&priv->monitor_recover);
3767 }
3768
3769 static struct attribute *iwl3945_sysfs_entries[] = {
3770         &dev_attr_antenna.attr,
3771         &dev_attr_channels.attr,
3772         &dev_attr_dump_errors.attr,
3773         &dev_attr_flags.attr,
3774         &dev_attr_filter_flags.attr,
3775         &dev_attr_measurement.attr,
3776         &dev_attr_retry_rate.attr,
3777         &dev_attr_status.attr,
3778         &dev_attr_temperature.attr,
3779         &dev_attr_tx_power.attr,
3780 #ifdef CONFIG_IWLWIFI_DEBUG
3781         &dev_attr_debug_level.attr,
3782 #endif
3783         NULL
3784 };
3785
3786 static struct attribute_group iwl3945_attribute_group = {
3787         .name = NULL,           /* put in device directory */
3788         .attrs = iwl3945_sysfs_entries,
3789 };
3790
3791 static struct ieee80211_ops iwl3945_hw_ops = {
3792         .tx = iwl3945_mac_tx,
3793         .start = iwl3945_mac_start,
3794         .stop = iwl3945_mac_stop,
3795         .add_interface = iwl_mac_add_interface,
3796         .remove_interface = iwl_mac_remove_interface,
3797         .config = iwl_mac_config,
3798         .configure_filter = iwl_configure_filter,
3799         .set_key = iwl3945_mac_set_key,
3800         .conf_tx = iwl_mac_conf_tx,
3801         .reset_tsf = iwl_mac_reset_tsf,
3802         .bss_info_changed = iwl_bss_info_changed,
3803         .hw_scan = iwl_mac_hw_scan,
3804         .sta_add = iwl3945_mac_sta_add,
3805         .sta_remove = iwl_mac_sta_remove,
3806 };
3807
3808 static int iwl3945_init_drv(struct iwl_priv *priv)
3809 {
3810         int ret;
3811         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3812
3813         priv->retry_rate = 1;
3814         priv->ibss_beacon = NULL;
3815
3816         spin_lock_init(&priv->sta_lock);
3817         spin_lock_init(&priv->hcmd_lock);
3818
3819         INIT_LIST_HEAD(&priv->free_frames);
3820
3821         mutex_init(&priv->mutex);
3822         mutex_init(&priv->sync_cmd_mutex);
3823
3824         priv->ieee_channels = NULL;
3825         priv->ieee_rates = NULL;
3826         priv->band = IEEE80211_BAND_2GHZ;
3827
3828         priv->iw_mode = NL80211_IFTYPE_STATION;
3829         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3830
3831         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3832
3833         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3834                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3835                          eeprom->version);
3836                 ret = -EINVAL;
3837                 goto err;
3838         }
3839         ret = iwl_init_channel_map(priv);
3840         if (ret) {
3841                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3842                 goto err;
3843         }
3844
3845         /* Set up txpower settings in driver for all channels */
3846         if (iwl3945_txpower_set_from_eeprom(priv)) {
3847                 ret = -EIO;
3848                 goto err_free_channel_map;
3849         }
3850
3851         ret = iwlcore_init_geos(priv);
3852         if (ret) {
3853                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3854                 goto err_free_channel_map;
3855         }
3856         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3857
3858         return 0;
3859
3860 err_free_channel_map:
3861         iwl_free_channel_map(priv);
3862 err:
3863         return ret;
3864 }
3865
3866 static int iwl3945_setup_mac(struct iwl_priv *priv)
3867 {
3868         int ret;
3869         struct ieee80211_hw *hw = priv->hw;
3870
3871         hw->rate_control_algorithm = "iwl-3945-rs";
3872         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3873
3874         /* Tell mac80211 our characteristics */
3875         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3876                     IEEE80211_HW_SPECTRUM_MGMT;
3877
3878         if (!priv->cfg->broken_powersave)
3879                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3880                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3881
3882         hw->wiphy->interface_modes =
3883                 BIT(NL80211_IFTYPE_STATION) |
3884                 BIT(NL80211_IFTYPE_ADHOC);
3885
3886         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3887                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3888
3889         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3890         /* we create the 802.11 header and a zero-length SSID element */
3891         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3892
3893         /* Default value; 4 EDCA QOS priorities */
3894         hw->queues = 4;
3895
3896         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3897                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3898                         &priv->bands[IEEE80211_BAND_2GHZ];
3899
3900         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3901                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3902                         &priv->bands[IEEE80211_BAND_5GHZ];
3903
3904         ret = ieee80211_register_hw(priv->hw);
3905         if (ret) {
3906                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3907                 return ret;
3908         }
3909         priv->mac80211_registered = 1;
3910
3911         return 0;
3912 }
3913
3914 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3915 {
3916         int err = 0;
3917         struct iwl_priv *priv;
3918         struct ieee80211_hw *hw;
3919         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3920         struct iwl3945_eeprom *eeprom;
3921         unsigned long flags;
3922
3923         /***********************
3924          * 1. Allocating HW data
3925          * ********************/
3926
3927         /* mac80211 allocates memory for this device instance, including
3928          *   space for this driver's private structure */
3929         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3930         if (hw == NULL) {
3931                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3932                 err = -ENOMEM;
3933                 goto out;
3934         }
3935         priv = hw->priv;
3936         SET_IEEE80211_DEV(hw, &pdev->dev);
3937
3938         /*
3939          * Disabling hardware scan means that mac80211 will perform scans
3940          * "the hard way", rather than using device's scan.
3941          */
3942         if (iwl3945_mod_params.disable_hw_scan) {
3943                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3944                 iwl3945_hw_ops.hw_scan = NULL;
3945         }
3946
3947
3948         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3949         priv->cfg = cfg;
3950         priv->pci_dev = pdev;
3951         priv->inta_mask = CSR_INI_SET_MASK;
3952
3953 #ifdef CONFIG_IWLWIFI_DEBUG
3954         atomic_set(&priv->restrict_refcnt, 0);
3955 #endif
3956         if (iwl_alloc_traffic_mem(priv))
3957                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3958
3959         /***************************
3960          * 2. Initializing PCI bus
3961          * *************************/
3962         if (pci_enable_device(pdev)) {
3963                 err = -ENODEV;
3964                 goto out_ieee80211_free_hw;
3965         }
3966
3967         pci_set_master(pdev);
3968
3969         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3970         if (!err)
3971                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3972         if (err) {
3973                 IWL_WARN(priv, "No suitable DMA available.\n");
3974                 goto out_pci_disable_device;
3975         }
3976
3977         pci_set_drvdata(pdev, priv);
3978         err = pci_request_regions(pdev, DRV_NAME);
3979         if (err)
3980                 goto out_pci_disable_device;
3981
3982         /***********************
3983          * 3. Read REV Register
3984          * ********************/
3985         priv->hw_base = pci_iomap(pdev, 0, 0);
3986         if (!priv->hw_base) {
3987                 err = -ENODEV;
3988                 goto out_pci_release_regions;
3989         }
3990
3991         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3992                         (unsigned long long) pci_resource_len(pdev, 0));
3993         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3994
3995         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3996          * PCI Tx retries from interfering with C3 CPU state */
3997         pci_write_config_byte(pdev, 0x41, 0x00);
3998
3999         /* these spin locks will be used in apm_ops.init and EEPROM access
4000          * we should init now
4001          */
4002         spin_lock_init(&priv->reg_lock);
4003         spin_lock_init(&priv->lock);
4004
4005         /*
4006          * stop and reset the on-board processor just in case it is in a
4007          * strange state ... like being left stranded by a primary kernel
4008          * and this is now the kdump kernel trying to start up
4009          */
4010         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4011
4012         /***********************
4013          * 4. Read EEPROM
4014          * ********************/
4015
4016         /* Read the EEPROM */
4017         err = iwl_eeprom_init(priv);
4018         if (err) {
4019                 IWL_ERR(priv, "Unable to init EEPROM\n");
4020                 goto out_iounmap;
4021         }
4022         /* MAC Address location in EEPROM same for 3945/4965 */
4023         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4024         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4025         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4026         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4027
4028         /***********************
4029          * 5. Setup HW Constants
4030          * ********************/
4031         /* Device-specific setup */
4032         if (iwl3945_hw_set_hw_params(priv)) {
4033                 IWL_ERR(priv, "failed to set hw settings\n");
4034                 goto out_eeprom_free;
4035         }
4036
4037         /***********************
4038          * 6. Setup priv
4039          * ********************/
4040
4041         err = iwl3945_init_drv(priv);
4042         if (err) {
4043                 IWL_ERR(priv, "initializing driver failed\n");
4044                 goto out_unset_hw_params;
4045         }
4046
4047         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4048                 priv->cfg->name);
4049
4050         /***********************
4051          * 7. Setup Services
4052          * ********************/
4053
4054         spin_lock_irqsave(&priv->lock, flags);
4055         iwl_disable_interrupts(priv);
4056         spin_unlock_irqrestore(&priv->lock, flags);
4057
4058         pci_enable_msi(priv->pci_dev);
4059
4060         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4061                           IRQF_SHARED, DRV_NAME, priv);
4062         if (err) {
4063                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4064                 goto out_disable_msi;
4065         }
4066
4067         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4068         if (err) {
4069                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4070                 goto out_release_irq;
4071         }
4072
4073         iwl_set_rxon_channel(priv,
4074                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4075         iwl3945_setup_deferred_work(priv);
4076         iwl3945_setup_rx_handlers(priv);
4077         iwl_power_initialize(priv);
4078
4079         /*********************************
4080          * 8. Setup and Register mac80211
4081          * *******************************/
4082
4083         iwl_enable_interrupts(priv);
4084
4085         err = iwl3945_setup_mac(priv);
4086         if (err)
4087                 goto  out_remove_sysfs;
4088
4089         err = iwl_dbgfs_register(priv, DRV_NAME);
4090         if (err)
4091                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4092
4093         /* Start monitoring the killswitch */
4094         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4095                            2 * HZ);
4096
4097         return 0;
4098
4099  out_remove_sysfs:
4100         destroy_workqueue(priv->workqueue);
4101         priv->workqueue = NULL;
4102         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4103  out_release_irq:
4104         free_irq(priv->pci_dev->irq, priv);
4105  out_disable_msi:
4106         pci_disable_msi(priv->pci_dev);
4107         iwlcore_free_geos(priv);
4108         iwl_free_channel_map(priv);
4109  out_unset_hw_params:
4110         iwl3945_unset_hw_params(priv);
4111  out_eeprom_free:
4112         iwl_eeprom_free(priv);
4113  out_iounmap:
4114         pci_iounmap(pdev, priv->hw_base);
4115  out_pci_release_regions:
4116         pci_release_regions(pdev);
4117  out_pci_disable_device:
4118         pci_set_drvdata(pdev, NULL);
4119         pci_disable_device(pdev);
4120  out_ieee80211_free_hw:
4121         iwl_free_traffic_mem(priv);
4122         ieee80211_free_hw(priv->hw);
4123  out:
4124         return err;
4125 }
4126
4127 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4128 {
4129         struct iwl_priv *priv = pci_get_drvdata(pdev);
4130         unsigned long flags;
4131
4132         if (!priv)
4133                 return;
4134
4135         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4136
4137         iwl_dbgfs_unregister(priv);
4138
4139         set_bit(STATUS_EXIT_PENDING, &priv->status);
4140
4141         if (priv->mac80211_registered) {
4142                 ieee80211_unregister_hw(priv->hw);
4143                 priv->mac80211_registered = 0;
4144         } else {
4145                 iwl3945_down(priv);
4146         }
4147
4148         /*
4149          * Make sure device is reset to low power before unloading driver.
4150          * This may be redundant with iwl_down(), but there are paths to
4151          * run iwl_down() without calling apm_ops.stop(), and there are
4152          * paths to avoid running iwl_down() at all before leaving driver.
4153          * This (inexpensive) call *makes sure* device is reset.
4154          */
4155         priv->cfg->ops->lib->apm_ops.stop(priv);
4156
4157         /* make sure we flush any pending irq or
4158          * tasklet for the driver
4159          */
4160         spin_lock_irqsave(&priv->lock, flags);
4161         iwl_disable_interrupts(priv);
4162         spin_unlock_irqrestore(&priv->lock, flags);
4163
4164         iwl_synchronize_irq(priv);
4165
4166         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4167
4168         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4169
4170         iwl3945_dealloc_ucode_pci(priv);
4171
4172         if (priv->rxq.bd)
4173                 iwl3945_rx_queue_free(priv, &priv->rxq);
4174         iwl3945_hw_txq_ctx_free(priv);
4175
4176         iwl3945_unset_hw_params(priv);
4177
4178         /*netif_stop_queue(dev); */
4179         flush_workqueue(priv->workqueue);
4180
4181         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4182          * priv->workqueue... so we can't take down the workqueue
4183          * until now... */
4184         destroy_workqueue(priv->workqueue);
4185         priv->workqueue = NULL;
4186         iwl_free_traffic_mem(priv);
4187
4188         free_irq(pdev->irq, priv);
4189         pci_disable_msi(pdev);
4190
4191         pci_iounmap(pdev, priv->hw_base);
4192         pci_release_regions(pdev);
4193         pci_disable_device(pdev);
4194         pci_set_drvdata(pdev, NULL);
4195
4196         iwl_free_channel_map(priv);
4197         iwlcore_free_geos(priv);
4198         kfree(priv->scan_cmd);
4199         if (priv->ibss_beacon)
4200                 dev_kfree_skb(priv->ibss_beacon);
4201
4202         ieee80211_free_hw(priv->hw);
4203 }
4204
4205
4206 /*****************************************************************************
4207  *
4208  * driver and module entry point
4209  *
4210  *****************************************************************************/
4211
4212 static struct pci_driver iwl3945_driver = {
4213         .name = DRV_NAME,
4214         .id_table = iwl3945_hw_card_ids,
4215         .probe = iwl3945_pci_probe,
4216         .remove = __devexit_p(iwl3945_pci_remove),
4217 #ifdef CONFIG_PM
4218         .suspend = iwl_pci_suspend,
4219         .resume = iwl_pci_resume,
4220 #endif
4221 };
4222
4223 static int __init iwl3945_init(void)
4224 {
4225
4226         int ret;
4227         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4228         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4229
4230         ret = iwl3945_rate_control_register();
4231         if (ret) {
4232                 printk(KERN_ERR DRV_NAME
4233                        "Unable to register rate control algorithm: %d\n", ret);
4234                 return ret;
4235         }
4236
4237         ret = pci_register_driver(&iwl3945_driver);
4238         if (ret) {
4239                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4240                 goto error_register;
4241         }
4242
4243         return ret;
4244
4245 error_register:
4246         iwl3945_rate_control_unregister();
4247         return ret;
4248 }
4249
4250 static void __exit iwl3945_exit(void)
4251 {
4252         pci_unregister_driver(&iwl3945_driver);
4253         iwl3945_rate_control_unregister();
4254 }
4255
4256 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4257
4258 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4259 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4260 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4261 MODULE_PARM_DESC(swcrypto,
4262                  "using software crypto (default 1 [software])\n");
4263 #ifdef CONFIG_IWLWIFI_DEBUG
4264 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4265 MODULE_PARM_DESC(debug, "debug output mask");
4266 #endif
4267 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4268                    int, S_IRUGO);
4269 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4270 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4271 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4272
4273 module_exit(iwl3945_exit);
4274 module_init(iwl3945_init);