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         struct iwl_addsta_cmd sta_cmd;
 201
 202         spin_lock_irqsave(&priv->sta_lock, flags);
 203         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 204         memset(&priv->stations[sta_id].sta.key, 0,
 205                 sizeof(struct iwl4965_keyinfo));
 206         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 207         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 208         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 209         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 210         spin_unlock_irqrestore(&priv->sta_lock, flags);
 211
 212         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 213         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 214 }
 215
 216 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 217                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 218 {
 219         int ret = 0;
 220
 221         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 222
 223         switch (keyconf->alg) {
 224         case ALG_CCMP:
 225                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 226                 break;
 227         case ALG_TKIP:
 228                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 229                 break;
 230         case ALG_WEP:
 231                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 232                 break;
 233         default:
 234                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 235                 ret = -EINVAL;
 236         }
 237
 238         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 239                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 240                       sta_id, ret);
 241
 242         return ret;
 243 }
 244
 245 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 246 {
 247         int ret = -EOPNOTSUPP;
 248
 249         return ret;
 250 }
 251
 252 static int iwl3945_set_static_key(struct iwl_priv *priv,
 253                                 struct ieee80211_key_conf *key)
 254 {
 255         if (key->alg == ALG_WEP)
 256                 return -EOPNOTSUPP;
 257
 258         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 259         return -EINVAL;
 260 }
 261
 262 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 263 {
 264         struct list_head *element;
 265
 266         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 267                        priv->frames_count);
 268
 269         while (!list_empty(&priv->free_frames)) {
 270                 element = priv->free_frames.next;
 271                 list_del(element);
 272                 kfree(list_entry(element, struct iwl3945_frame, list));
 273                 priv->frames_count--;
 274         }
 275
 276         if (priv->frames_count) {
 277                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 278                             priv->frames_count);
 279                 priv->frames_count = 0;
 280         }
 281 }
 282
 283 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 284 {
 285         struct iwl3945_frame *frame;
 286         struct list_head *element;
 287         if (list_empty(&priv->free_frames)) {
 288                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 289                 if (!frame) {
 290                         IWL_ERR(priv, "Could not allocate frame!\n");
 291                         return NULL;
 292                 }
 293
 294                 priv->frames_count++;
 295                 return frame;
 296         }
 297
 298         element = priv->free_frames.next;
 299         list_del(element);
 300         return list_entry(element, struct iwl3945_frame, list);
 301 }
 302
 303 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 304 {
 305         memset(frame, 0, sizeof(*frame));
 306         list_add(&frame->list, &priv->free_frames);
 307 }
 308
 309 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 310                                 struct ieee80211_hdr *hdr,
 311                                 int left)
 312 {
 313
 314         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 315             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 316              (priv->iw_mode != NL80211_IFTYPE_AP)))
 317                 return 0;
 318
 319         if (priv->ibss_beacon->len > left)
 320                 return 0;
 321
 322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 323
 324         return priv->ibss_beacon->len;
 325 }
 326
 327 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 328 {
 329         struct iwl3945_frame *frame;
 330         unsigned int frame_size;
 331         int rc;
 332         u8 rate;
 333
 334         frame = iwl3945_get_free_frame(priv);
 335
 336         if (!frame) {
 337                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 338                           "command.\n");
 339                 return -ENOMEM;
 340         }
 341
 342         rate = iwl_rate_get_lowest_plcp(priv);
 343
 344         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 345
 346         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 347                               &frame->u.cmd[0]);
 348
 349         iwl3945_free_frame(priv, frame);
 350
 351         return rc;
 352 }
 353
 354 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 355 {
 356         if (priv->_3945.shared_virt)
 357                 dma_free_coherent(&priv->pci_dev->dev,
 358                                   sizeof(struct iwl3945_shared),
 359                                   priv->_3945.shared_virt,
 360                                   priv->_3945.shared_phys);
 361 }
 362
 363 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 364                                       struct ieee80211_tx_info *info,
 365                                       struct iwl_device_cmd *cmd,
 366                                       struct sk_buff *skb_frag,
 367                                       int sta_id)
 368 {
 369         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 370         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 371
 372         switch (keyinfo->alg) {
 373         case ALG_CCMP:
 374                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 375                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 376                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 377                 break;
 378
 379         case ALG_TKIP:
 380                 break;
 381
 382         case ALG_WEP:
 383                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 384                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 385
 386                 if (keyinfo->keylen == 13)
 387                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 388
 389                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 390
 391                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 392                              "with key %d\n", info->control.hw_key->hw_key_idx);
 393                 break;
 394
 395         default:
 396                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 397                 break;
 398         }
 399 }
 400
 401 /*
 402  * handle build REPLY_TX command notification.
 403  */
 404 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 405                                   struct iwl_device_cmd *cmd,
 406                                   struct ieee80211_tx_info *info,
 407                                   struct ieee80211_hdr *hdr, u8 std_id)
 408 {
 409         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 410         __le32 tx_flags = tx_cmd->tx_flags;
 411         __le16 fc = hdr->frame_control;
 412
 413         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 414         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 415                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 416                 if (ieee80211_is_mgmt(fc))
 417                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 418                 if (ieee80211_is_probe_resp(fc) &&
 419                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 420                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 421         } else {
 422                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 423                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 424         }
 425
 426         tx_cmd->sta_id = std_id;
 427         if (ieee80211_has_morefrags(fc))
 428                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 429
 430         if (ieee80211_is_data_qos(fc)) {
 431                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 432                 tx_cmd->tid_tspec = qc[0] & 0xf;
 433                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 434         } else {
 435                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 436         }
 437
 438         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 439
 440         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 441                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 442
 443         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 444         if (ieee80211_is_mgmt(fc)) {
 445                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 447                 else
 448                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 449         } else {
 450                 tx_cmd->timeout.pm_frame_timeout = 0;
 451         }
 452
 453         tx_cmd->driver_txop = 0;
 454         tx_cmd->tx_flags = tx_flags;
 455         tx_cmd->next_frame_len = 0;
 456 }
 457
 458 /*
 459  * start REPLY_TX command process
 460  */
 461 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 462 {
 463         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 464         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 465         struct iwl3945_tx_cmd *tx_cmd;
 466         struct iwl_tx_queue *txq = NULL;
 467         struct iwl_queue *q = NULL;
 468         struct iwl_device_cmd *out_cmd;
 469         struct iwl_cmd_meta *out_meta;
 470         dma_addr_t phys_addr;
 471         dma_addr_t txcmd_phys;
 472         int txq_id = skb_get_queue_mapping(skb);
 473         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 474         u8 id;
 475         u8 unicast;
 476         u8 sta_id;
 477         u8 tid = 0;
 478         __le16 fc;
 479         u8 wait_write_ptr = 0;
 480         unsigned long flags;
 481
 482         spin_lock_irqsave(&priv->lock, flags);
 483         if (iwl_is_rfkill(priv)) {
 484                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 485                 goto drop_unlock;
 486         }
 487
 488         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 489                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 490                 goto drop_unlock;
 491         }
 492
 493         unicast = !is_multicast_ether_addr(hdr->addr1);
 494         id = 0;
 495
 496         fc = hdr->frame_control;
 497
 498 #ifdef CONFIG_IWLWIFI_DEBUG
 499         if (ieee80211_is_auth(fc))
 500                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 501         else if (ieee80211_is_assoc_req(fc))
 502                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 503         else if (ieee80211_is_reassoc_req(fc))
 504                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 505 #endif
 506
 507         spin_unlock_irqrestore(&priv->lock, flags);
 508
 509         hdr_len = ieee80211_hdrlen(fc);
 510
 511         /* Find index into station table for destination station */
 512         sta_id = iwl_sta_id_or_broadcast(priv, info->control.sta);
 513         if (sta_id == IWL_INVALID_STATION) {
 514                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 515                                hdr->addr1);
 516                 goto drop;
 517         }
 518
 519         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 520
 521         if (ieee80211_is_data_qos(fc)) {
 522                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 523                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 524                 if (unlikely(tid >= MAX_TID_COUNT))
 525                         goto drop;
 526         }
 527
 528         /* Descriptor for chosen Tx queue */
 529         txq = &priv->txq[txq_id];
 530         q = &txq->q;
 531
 532         if ((iwl_queue_space(q) < q->high_mark))
 533                 goto drop;
 534
 535         spin_lock_irqsave(&priv->lock, flags);
 536
 537         idx = get_cmd_index(q, q->write_ptr, 0);
 538
 539         /* Set up driver data for this TFD */
 540         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 541         txq->txb[q->write_ptr].skb = skb;
 542
 543         /* Init first empty entry in queue's array of Tx/cmd buffers */
 544         out_cmd = txq->cmd[idx];
 545         out_meta = &txq->meta[idx];
 546         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 547         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 548         memset(tx_cmd, 0, sizeof(*tx_cmd));
 549
 550         /*
 551          * Set up the Tx-command (not MAC!) header.
 552          * Store the chosen Tx queue and TFD index within the sequence field;
 553          * after Tx, uCode's Tx response will return this value so driver can
 554          * locate the frame within the tx queue and do post-tx processing.
 555          */
 556         out_cmd->hdr.cmd = REPLY_TX;
 557         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 558                                 INDEX_TO_SEQ(q->write_ptr)));
 559
 560         /* Copy MAC header from skb into command buffer */
 561         memcpy(tx_cmd->hdr, hdr, hdr_len);
 562
 563
 564         if (info->control.hw_key)
 565                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 566
 567         /* TODO need this for burst mode later on */
 568         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 569
 570         /* set is_hcca to 0; it probably will never be implemented */
 571         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 572
 573         /* Total # bytes to be transmitted */
 574         len = (u16)skb->len;
 575         tx_cmd->len = cpu_to_le16(len);
 576
 577         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 578         iwl_update_stats(priv, true, fc, len);
 579         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 580         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 581
 582         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 583                 txq->need_update = 1;
 584         } else {
 585                 wait_write_ptr = 1;
 586                 txq->need_update = 0;
 587         }
 588
 589         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 590                      le16_to_cpu(out_cmd->hdr.sequence));
 591         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 592         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 593         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 594                            ieee80211_hdrlen(fc));
 595
 596         /*
 597          * Use the first empty entry in this queue's command buffer array
 598          * to contain the Tx command and MAC header concatenated together
 599          * (payload data will be in another buffer).
 600          * Size of this varies, due to varying MAC header length.
 601          * If end is not dword aligned, we'll have 2 extra bytes at the end
 602          * of the MAC header (device reads on dword boundaries).
 603          * We'll tell device about this padding later.
 604          */
 605         len = sizeof(struct iwl3945_tx_cmd) +
 606                         sizeof(struct iwl_cmd_header) + hdr_len;
 607
 608         len_org = len;
 609         len = (len + 3) & ~3;
 610
 611         if (len_org != len)
 612                 len_org = 1;
 613         else
 614                 len_org = 0;
 615
 616         /* Physical address of this Tx command's header (not MAC header!),
 617          * within command buffer array. */
 618         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 619                                     len, PCI_DMA_TODEVICE);
 620         /* we do not map meta data ... so we can safely access address to
 621          * provide to unmap command*/
 622         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 623         dma_unmap_len_set(out_meta, len, len);
 624
 625         /* Add buffer containing Tx command and MAC(!) header to TFD's
 626          * first entry */
 627         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 628                                                    txcmd_phys, len, 1, 0);
 629
 630
 631         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 632          * if any (802.11 null frames have no payload). */
 633         len = skb->len - hdr_len;
 634         if (len) {
 635                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 636                                            len, PCI_DMA_TODEVICE);
 637                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 638                                                            phys_addr, len,
 639                                                            0, U32_PAD(len));
 640         }
 641
 642
 643         /* Tell device the write index *just past* this latest filled TFD */
 644         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 645         iwl_txq_update_write_ptr(priv, txq);
 646         spin_unlock_irqrestore(&priv->lock, flags);
 647
 648         if ((iwl_queue_space(q) < q->high_mark)
 649             && priv->mac80211_registered) {
 650                 if (wait_write_ptr) {
 651                         spin_lock_irqsave(&priv->lock, flags);
 652                         txq->need_update = 1;
 653                         iwl_txq_update_write_ptr(priv, txq);
 654                         spin_unlock_irqrestore(&priv->lock, flags);
 655                 }
 656
 657                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 658         }
 659
 660         return 0;
 661
 662 drop_unlock:
 663         spin_unlock_irqrestore(&priv->lock, flags);
 664 drop:
 665         return -1;
 666 }
 667
 668 static int iwl3945_get_measurement(struct iwl_priv *priv,
 669                                struct ieee80211_measurement_params *params,
 670                                u8 type)
 671 {
 672         struct iwl_spectrum_cmd spectrum;
 673         struct iwl_rx_packet *pkt;
 674         struct iwl_host_cmd cmd = {
 675                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 676                 .data = (void *)&spectrum,
 677                 .flags = CMD_WANT_SKB,
 678         };
 679         u32 add_time = le64_to_cpu(params->start_time);
 680         int rc;
 681         int spectrum_resp_status;
 682         int duration = le16_to_cpu(params->duration);
 683
 684         if (iwl_is_associated(priv))
 685                 add_time = iwl_usecs_to_beacons(priv,
 686                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 687                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 688
 689         memset(&spectrum, 0, sizeof(spectrum));
 690
 691         spectrum.channel_count = cpu_to_le16(1);
 692         spectrum.flags =
 693             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 694         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 695         cmd.len = sizeof(spectrum);
 696         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 697
 698         if (iwl_is_associated(priv))
 699                 spectrum.start_time =
 700                         iwl_add_beacon_time(priv,
 701                                 priv->_3945.last_beacon_time, add_time,
 702                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 703         else
 704                 spectrum.start_time = 0;
 705
 706         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 707         spectrum.channels[0].channel = params->channel;
 708         spectrum.channels[0].type = type;
 709         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 710                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 711                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 712
 713         rc = iwl_send_cmd_sync(priv, &cmd);
 714         if (rc)
 715                 return rc;
 716
 717         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 718         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 719                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 720                 rc = -EIO;
 721         }
 722
 723         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 724         switch (spectrum_resp_status) {
 725         case 0:         /* Command will be handled */
 726                 if (pkt->u.spectrum.id != 0xff) {
 727                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 728                                                 pkt->u.spectrum.id);
 729                         priv->measurement_status &= ~MEASUREMENT_READY;
 730                 }
 731                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 732                 rc = 0;
 733                 break;
 734
 735         case 1:         /* Command will not be handled */
 736                 rc = -EAGAIN;
 737                 break;
 738         }
 739
 740         iwl_free_pages(priv, cmd.reply_page);
 741
 742         return rc;
 743 }
 744
 745 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 746                                struct iwl_rx_mem_buffer *rxb)
 747 {
 748         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 749         struct iwl_alive_resp *palive;
 750         struct delayed_work *pwork;
 751
 752         palive = &pkt->u.alive_frame;
 753
 754         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 755                        "0x%01X 0x%01X\n",
 756                        palive->is_valid, palive->ver_type,
 757                        palive->ver_subtype);
 758
 759         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 760                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 761                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 762                        sizeof(struct iwl_alive_resp));
 763                 pwork = &priv->init_alive_start;
 764         } else {
 765                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 766                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 767                        sizeof(struct iwl_alive_resp));
 768                 pwork = &priv->alive_start;
 769                 iwl3945_disable_events(priv);
 770         }
 771
 772         /* We delay the ALIVE response by 5ms to
 773          * give the HW RF Kill time to activate... */
 774         if (palive->is_valid == UCODE_VALID_OK)
 775                 queue_delayed_work(priv->workqueue, pwork,
 776                                    msecs_to_jiffies(5));
 777         else
 778                 IWL_WARN(priv, "uCode did not respond OK.\n");
 779 }
 780
 781 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 782                                  struct iwl_rx_mem_buffer *rxb)
 783 {
 784 #ifdef CONFIG_IWLWIFI_DEBUG
 785         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 786 #endif
 787
 788         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 789 }
 790
 791 static void iwl3945_bg_beacon_update(struct work_struct *work)
 792 {
 793         struct iwl_priv *priv =
 794                 container_of(work, struct iwl_priv, beacon_update);
 795         struct sk_buff *beacon;
 796
 797         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 798         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 799
 800         if (!beacon) {
 801                 IWL_ERR(priv, "update beacon failed\n");
 802                 return;
 803         }
 804
 805         mutex_lock(&priv->mutex);
 806         /* new beacon skb is allocated every time; dispose previous.*/
 807         if (priv->ibss_beacon)
 808                 dev_kfree_skb(priv->ibss_beacon);
 809
 810         priv->ibss_beacon = beacon;
 811         mutex_unlock(&priv->mutex);
 812
 813         iwl3945_send_beacon_cmd(priv);
 814 }
 815
 816 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 817                                 struct iwl_rx_mem_buffer *rxb)
 818 {
 819 #ifdef CONFIG_IWLWIFI_DEBUG
 820         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 821         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 822         u8 rate = beacon->beacon_notify_hdr.rate;
 823
 824         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 825                 "tsf %d %d rate %d\n",
 826                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 827                 beacon->beacon_notify_hdr.failure_frame,
 828                 le32_to_cpu(beacon->ibss_mgr_status),
 829                 le32_to_cpu(beacon->high_tsf),
 830                 le32_to_cpu(beacon->low_tsf), rate);
 831 #endif
 832
 833         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 834             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 835                 queue_work(priv->workqueue, &priv->beacon_update);
 836 }
 837
 838 /* Handle notification from uCode that card's power state is changing
 839  * due to software, hardware, or critical temperature RFKILL */
 840 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 841                                     struct iwl_rx_mem_buffer *rxb)
 842 {
 843         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 844         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 845         unsigned long status = priv->status;
 846
 847         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 848                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 849                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 850
 851         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 852                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 853
 854         if (flags & HW_CARD_DISABLED)
 855                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 856         else
 857                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 858
 859
 860         iwl_scan_cancel(priv);
 861
 862         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 863              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 864                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 865                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 866         else
 867                 wake_up_interruptible(&priv->wait_command_queue);
 868 }
 869
 870 /**
 871  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 872  *
 873  * Setup the RX handlers for each of the reply types sent from the uCode
 874  * to the host.
 875  *
 876  * This function chains into the hardware specific files for them to setup
 877  * any hardware specific handlers as well.
 878  */
 879 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 880 {
 881         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 882         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 883         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 884         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 885         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 886                         iwl_rx_spectrum_measure_notif;
 887         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 888         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 889             iwl_rx_pm_debug_statistics_notif;
 890         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 891
 892         /*
 893          * The same handler is used for both the REPLY to a discrete
 894          * statistics request from the host as well as for the periodic
 895          * statistics notifications (after received beacons) from the uCode.
 896          */
 897         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 898         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 899
 900         iwl_setup_rx_scan_handlers(priv);
 901         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 902
 903         /* Set up hardware specific Rx handlers */
 904         iwl3945_hw_rx_handler_setup(priv);
 905 }
 906
 907 /************************** RX-FUNCTIONS ****************************/
 908 /*
 909  * Rx theory of operation
 910  *
 911  * The host allocates 32 DMA target addresses and passes the host address
 912  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 913  * 0 to 31
 914  *
 915  * Rx Queue Indexes
 916  * The host/firmware share two index registers for managing the Rx buffers.
 917  *
 918  * The READ index maps to the first position that the firmware may be writing
 919  * to -- the driver can read up to (but not including) this position and get
 920  * good data.
 921  * The READ index is managed by the firmware once the card is enabled.
 922  *
 923  * The WRITE index maps to the last position the driver has read from -- the
 924  * position preceding WRITE is the last slot the firmware can place a packet.
 925  *
 926  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 927  * WRITE = READ.
 928  *
 929  * During initialization, the host sets up the READ queue position to the first
 930  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 931  *
 932  * When the firmware places a packet in a buffer, it will advance the READ index
 933  * and fire the RX interrupt.  The driver can then query the READ index and
 934  * process as many packets as possible, moving the WRITE index forward as it
 935  * resets the Rx queue buffers with new memory.
 936  *
 937  * The management in the driver is as follows:
 938  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 939  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 940  *   to replenish the iwl->rxq->rx_free.
 941  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 942  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 943  *   'processed' and 'read' driver indexes as well)
 944  * + A received packet is processed and handed to the kernel network stack,
 945  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 946  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 947  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 948  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 949  *   were enough free buffers and RX_STALLED is set it is cleared.
 950  *
 951  *
 952  * Driver sequence:
 953  *
 954  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 955  *                            iwl3945_rx_queue_restock
 956  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 957  *                            queue, updates firmware pointers, and updates
 958  *                            the WRITE index.  If insufficient rx_free buffers
 959  *                            are available, schedules iwl3945_rx_replenish
 960  *
 961  * -- enable interrupts --
 962  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 963  *                            READ INDEX, detaching the SKB from the pool.
 964  *                            Moves the packet buffer from queue to rx_used.
 965  *                            Calls iwl3945_rx_queue_restock to refill any empty
 966  *                            slots.
 967  * ...
 968  *
 969  */
 970
 971 /**
 972  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 973  */
 974 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 975                                           dma_addr_t dma_addr)
 976 {
 977         return cpu_to_le32((u32)dma_addr);
 978 }
 979
 980 /**
 981  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 982  *
 983  * If there are slots in the RX queue that need to be restocked,
 984  * and we have free pre-allocated buffers, fill the ranks as much
 985  * as we can, pulling from rx_free.
 986  *
 987  * This moves the 'write' index forward to catch up with 'processed', and
 988  * also updates the memory address in the firmware to reference the new
 989  * target buffer.
 990  */
 991 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
 992 {
 993         struct iwl_rx_queue *rxq = &priv->rxq;
 994         struct list_head *element;
 995         struct iwl_rx_mem_buffer *rxb;
 996         unsigned long flags;
 997         int write;
 998
 999         spin_lock_irqsave(&rxq->lock, flags);
1000         write = rxq->write & ~0x7;
1001         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1002                 /* Get next free Rx buffer, remove from free list */
1003                 element = rxq->rx_free.next;
1004                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1005                 list_del(element);
1006
1007                 /* Point to Rx buffer via next RBD in circular buffer */
1008                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1009                 rxq->queue[rxq->write] = rxb;
1010                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1011                 rxq->free_count--;
1012         }
1013         spin_unlock_irqrestore(&rxq->lock, flags);
1014         /* If the pre-allocated buffer pool is dropping low, schedule to
1015          * refill it */
1016         if (rxq->free_count <= RX_LOW_WATERMARK)
1017                 queue_work(priv->workqueue, &priv->rx_replenish);
1018
1019
1020         /* If we've added more space for the firmware to place data, tell it.
1021          * Increment device's write pointer in multiples of 8. */
1022         if ((rxq->write_actual != (rxq->write & ~0x7))
1023             || (abs(rxq->write - rxq->read) > 7)) {
1024                 spin_lock_irqsave(&rxq->lock, flags);
1025                 rxq->need_update = 1;
1026                 spin_unlock_irqrestore(&rxq->lock, flags);
1027                 iwl_rx_queue_update_write_ptr(priv, rxq);
1028         }
1029 }
1030
1031 /**
1032  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1033  *
1034  * When moving to rx_free an SKB is allocated for the slot.
1035  *
1036  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1037  * This is called as a scheduled work item (except for during initialization)
1038  */
1039 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1040 {
1041         struct iwl_rx_queue *rxq = &priv->rxq;
1042         struct list_head *element;
1043         struct iwl_rx_mem_buffer *rxb;
1044         struct page *page;
1045         unsigned long flags;
1046         gfp_t gfp_mask = priority;
1047
1048         while (1) {
1049                 spin_lock_irqsave(&rxq->lock, flags);
1050
1051                 if (list_empty(&rxq->rx_used)) {
1052                         spin_unlock_irqrestore(&rxq->lock, flags);
1053                         return;
1054                 }
1055                 spin_unlock_irqrestore(&rxq->lock, flags);
1056
1057                 if (rxq->free_count > RX_LOW_WATERMARK)
1058                         gfp_mask |= __GFP_NOWARN;
1059
1060                 if (priv->hw_params.rx_page_order > 0)
1061                         gfp_mask |= __GFP_COMP;
1062
1063                 /* Alloc a new receive buffer */
1064                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1065                 if (!page) {
1066                         if (net_ratelimit())
1067                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1068                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1069                             net_ratelimit())
1070                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1071                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1072                                          rxq->free_count);
1073                         /* We don't reschedule replenish work here -- we will
1074                          * call the restock method and if it still needs
1075                          * more buffers it will schedule replenish */
1076                         break;
1077                 }
1078
1079                 spin_lock_irqsave(&rxq->lock, flags);
1080                 if (list_empty(&rxq->rx_used)) {
1081                         spin_unlock_irqrestore(&rxq->lock, flags);
1082                         __free_pages(page, priv->hw_params.rx_page_order);
1083                         return;
1084                 }
1085                 element = rxq->rx_used.next;
1086                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1087                 list_del(element);
1088                 spin_unlock_irqrestore(&rxq->lock, flags);
1089
1090                 rxb->page = page;
1091                 /* Get physical address of RB/SKB */
1092                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1093                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1094                                 PCI_DMA_FROMDEVICE);
1095
1096                 spin_lock_irqsave(&rxq->lock, flags);
1097
1098                 list_add_tail(&rxb->list, &rxq->rx_free);
1099                 rxq->free_count++;
1100                 priv->alloc_rxb_page++;
1101
1102                 spin_unlock_irqrestore(&rxq->lock, flags);
1103         }
1104 }
1105
1106 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1107 {
1108         unsigned long flags;
1109         int i;
1110         spin_lock_irqsave(&rxq->lock, flags);
1111         INIT_LIST_HEAD(&rxq->rx_free);
1112         INIT_LIST_HEAD(&rxq->rx_used);
1113         /* Fill the rx_used queue with _all_ of the Rx buffers */
1114         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1115                 /* In the reset function, these buffers may have been allocated
1116                  * to an SKB, so we need to unmap and free potential storage */
1117                 if (rxq->pool[i].page != NULL) {
1118                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1119                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1120                                 PCI_DMA_FROMDEVICE);
1121                         __iwl_free_pages(priv, rxq->pool[i].page);
1122                         rxq->pool[i].page = NULL;
1123                 }
1124                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1125         }
1126
1127         /* Set us so that we have processed and used all buffers, but have
1128          * not restocked the Rx queue with fresh buffers */
1129         rxq->read = rxq->write = 0;
1130         rxq->write_actual = 0;
1131         rxq->free_count = 0;
1132         spin_unlock_irqrestore(&rxq->lock, flags);
1133 }
1134
1135 void iwl3945_rx_replenish(void *data)
1136 {
1137         struct iwl_priv *priv = data;
1138         unsigned long flags;
1139
1140         iwl3945_rx_allocate(priv, GFP_KERNEL);
1141
1142         spin_lock_irqsave(&priv->lock, flags);
1143         iwl3945_rx_queue_restock(priv);
1144         spin_unlock_irqrestore(&priv->lock, flags);
1145 }
1146
1147 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1148 {
1149         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1150
1151         iwl3945_rx_queue_restock(priv);
1152 }
1153
1154
1155 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1156  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1157  * This free routine walks the list of POOL entries and if SKB is set to
1158  * non NULL it is unmapped and freed
1159  */
1160 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1161 {
1162         int i;
1163         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1164                 if (rxq->pool[i].page != NULL) {
1165                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1166                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1167                                 PCI_DMA_FROMDEVICE);
1168                         __iwl_free_pages(priv, rxq->pool[i].page);
1169                         rxq->pool[i].page = NULL;
1170                 }
1171         }
1172
1173         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1174                           rxq->dma_addr);
1175         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1176                           rxq->rb_stts, rxq->rb_stts_dma);
1177         rxq->bd = NULL;
1178         rxq->rb_stts  = NULL;
1179 }
1180
1181
1182 /* Convert linear signal-to-noise ratio into dB */
1183 static u8 ratio2dB[100] = {
1184 /*       0   1   2   3   4   5   6   7   8   9 */
1185          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1186         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1187         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1188         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1189         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1190         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1191         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1192         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1193         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1194         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1195 };
1196
1197 /* Calculates a relative dB value from a ratio of linear
1198  *   (i.e. not dB) signal levels.
1199  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1200 int iwl3945_calc_db_from_ratio(int sig_ratio)
1201 {
1202         /* 1000:1 or higher just report as 60 dB */
1203         if (sig_ratio >= 1000)
1204                 return 60;
1205
1206         /* 100:1 or higher, divide by 10 and use table,
1207          *   add 20 dB to make up for divide by 10 */
1208         if (sig_ratio >= 100)
1209                 return 20 + (int)ratio2dB[sig_ratio/10];
1210
1211         /* We shouldn't see this */
1212         if (sig_ratio < 1)
1213                 return 0;
1214
1215         /* Use table for ratios 1:1 - 99:1 */
1216         return (int)ratio2dB[sig_ratio];
1217 }
1218
1219 /**
1220  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1221  *
1222  * Uses the priv->rx_handlers callback function array to invoke
1223  * the appropriate handlers, including command responses,
1224  * frame-received notifications, and other notifications.
1225  */
1226 static void iwl3945_rx_handle(struct iwl_priv *priv)
1227 {
1228         struct iwl_rx_mem_buffer *rxb;
1229         struct iwl_rx_packet *pkt;
1230         struct iwl_rx_queue *rxq = &priv->rxq;
1231         u32 r, i;
1232         int reclaim;
1233         unsigned long flags;
1234         u8 fill_rx = 0;
1235         u32 count = 8;
1236         int total_empty = 0;
1237
1238         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1239          * buffer that the driver may process (last buffer filled by ucode). */
1240         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1241         i = rxq->read;
1242
1243         /* calculate total frames need to be restock after handling RX */
1244         total_empty = r - rxq->write_actual;
1245         if (total_empty < 0)
1246                 total_empty += RX_QUEUE_SIZE;
1247
1248         if (total_empty > (RX_QUEUE_SIZE / 2))
1249                 fill_rx = 1;
1250         /* Rx interrupt, but nothing sent from uCode */
1251         if (i == r)
1252                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1253
1254         while (i != r) {
1255                 rxb = rxq->queue[i];
1256
1257                 /* If an RXB doesn't have a Rx queue slot associated with it,
1258                  * then a bug has been introduced in the queue refilling
1259                  * routines -- catch it here */
1260                 BUG_ON(rxb == NULL);
1261
1262                 rxq->queue[i] = NULL;
1263
1264                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1265                                PAGE_SIZE << priv->hw_params.rx_page_order,
1266                                PCI_DMA_FROMDEVICE);
1267                 pkt = rxb_addr(rxb);
1268
1269                 trace_iwlwifi_dev_rx(priv, pkt,
1270                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1271
1272                 /* Reclaim a command buffer only if this packet is a response
1273                  *   to a (driver-originated) command.
1274                  * If the packet (e.g. Rx frame) originated from uCode,
1275                  *   there is no command buffer to reclaim.
1276                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1277                  *   but apparently a few don't get set; catch them here. */
1278                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1279                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1280                         (pkt->hdr.cmd != REPLY_TX);
1281
1282                 /* Based on type of command response or notification,
1283                  *   handle those that need handling via function in
1284                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1285                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1286                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1287                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1288                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1289                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1290                 } else {
1291                         /* No handling needed */
1292                         IWL_DEBUG_RX(priv,
1293                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1294                                 r, i, get_cmd_string(pkt->hdr.cmd),
1295                                 pkt->hdr.cmd);
1296                 }
1297
1298                 /*
1299                  * XXX: After here, we should always check rxb->page
1300                  * against NULL before touching it or its virtual
1301                  * memory (pkt). Because some rx_handler might have
1302                  * already taken or freed the pages.
1303                  */
1304
1305                 if (reclaim) {
1306                         /* Invoke any callbacks, transfer the buffer to caller,
1307                          * and fire off the (possibly) blocking iwl_send_cmd()
1308                          * as we reclaim the driver command queue */
1309                         if (rxb->page)
1310                                 iwl_tx_cmd_complete(priv, rxb);
1311                         else
1312                                 IWL_WARN(priv, "Claim null rxb?\n");
1313                 }
1314
1315                 /* Reuse the page if possible. For notification packets and
1316                  * SKBs that fail to Rx correctly, add them back into the
1317                  * rx_free list for reuse later. */
1318                 spin_lock_irqsave(&rxq->lock, flags);
1319                 if (rxb->page != NULL) {
1320                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1321                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1322                                 PCI_DMA_FROMDEVICE);
1323                         list_add_tail(&rxb->list, &rxq->rx_free);
1324                         rxq->free_count++;
1325                 } else
1326                         list_add_tail(&rxb->list, &rxq->rx_used);
1327
1328                 spin_unlock_irqrestore(&rxq->lock, flags);
1329
1330                 i = (i + 1) & RX_QUEUE_MASK;
1331                 /* If there are a lot of unused frames,
1332                  * restock the Rx queue so ucode won't assert. */
1333                 if (fill_rx) {
1334                         count++;
1335                         if (count >= 8) {
1336                                 rxq->read = i;
1337                                 iwl3945_rx_replenish_now(priv);
1338                                 count = 0;
1339                         }
1340                 }
1341         }
1342
1343         /* Backtrack one entry */
1344         rxq->read = i;
1345         if (fill_rx)
1346                 iwl3945_rx_replenish_now(priv);
1347         else
1348                 iwl3945_rx_queue_restock(priv);
1349 }
1350
1351 /* call this function to flush any scheduled tasklet */
1352 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1353 {
1354         /* wait to make sure we flush pending tasklet*/
1355         synchronize_irq(priv->pci_dev->irq);
1356         tasklet_kill(&priv->irq_tasklet);
1357 }
1358
1359 static const char *desc_lookup(int i)
1360 {
1361         switch (i) {
1362         case 1:
1363                 return "FAIL";
1364         case 2:
1365                 return "BAD_PARAM";
1366         case 3:
1367                 return "BAD_CHECKSUM";
1368         case 4:
1369                 return "NMI_INTERRUPT";
1370         case 5:
1371                 return "SYSASSERT";
1372         case 6:
1373                 return "FATAL_ERROR";
1374         }
1375
1376         return "UNKNOWN";
1377 }
1378
1379 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1380 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1381
1382 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1383 {
1384         u32 i;
1385         u32 desc, time, count, base, data1;
1386         u32 blink1, blink2, ilink1, ilink2;
1387
1388         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1389
1390         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1391                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1392                 return;
1393         }
1394
1395
1396         count = iwl_read_targ_mem(priv, base);
1397
1398         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1399                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1400                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1401                         priv->status, count);
1402         }
1403
1404         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1405                   "ilink1  nmiPC   Line\n");
1406         for (i = ERROR_START_OFFSET;
1407              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1408              i += ERROR_ELEM_SIZE) {
1409                 desc = iwl_read_targ_mem(priv, base + i);
1410                 time =
1411                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1412                 blink1 =
1413                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1414                 blink2 =
1415                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1416                 ilink1 =
1417                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1418                 ilink2 =
1419                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1420                 data1 =
1421                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1422
1423                 IWL_ERR(priv,
1424                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1425                         desc_lookup(desc), desc, time, blink1, blink2,
1426                         ilink1, ilink2, data1);
1427                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1428                                         0, blink1, blink2, ilink1, ilink2);
1429         }
1430 }
1431
1432 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1433
1434 /**
1435  * iwl3945_print_event_log - Dump error event log to syslog
1436  *
1437  */
1438 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1439                                   u32 num_events, u32 mode,
1440                                   int pos, char **buf, size_t bufsz)
1441 {
1442         u32 i;
1443         u32 base;       /* SRAM byte address of event log header */
1444         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1445         u32 ptr;        /* SRAM byte address of log data */
1446         u32 ev, time, data; /* event log data */
1447         unsigned long reg_flags;
1448
1449         if (num_events == 0)
1450                 return pos;
1451
1452         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1453
1454         if (mode == 0)
1455                 event_size = 2 * sizeof(u32);
1456         else
1457                 event_size = 3 * sizeof(u32);
1458
1459         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1460
1461         /* Make sure device is powered up for SRAM reads */
1462         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1463         iwl_grab_nic_access(priv);
1464
1465         /* Set starting address; reads will auto-increment */
1466         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1467         rmb();
1468
1469         /* "time" is actually "data" for mode 0 (no timestamp).
1470          * place event id # at far right for easier visual parsing. */
1471         for (i = 0; i < num_events; i++) {
1472                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1473                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1474                 if (mode == 0) {
1475                         /* data, ev */
1476                         if (bufsz) {
1477                                 pos += scnprintf(*buf + pos, bufsz - pos,
1478                                                 "0x%08x:%04u\n",
1479                                                 time, ev);
1480                         } else {
1481                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1482                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1483                                                               time, ev);
1484                         }
1485                 } else {
1486                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1487                         if (bufsz) {
1488                                 pos += scnprintf(*buf + pos, bufsz - pos,
1489                                                 "%010u:0x%08x:%04u\n",
1490                                                  time, data, ev);
1491                         } else {
1492                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1493                                         time, data, ev);
1494                                 trace_iwlwifi_dev_ucode_event(priv, time,
1495                                                               data, ev);
1496                         }
1497                 }
1498         }
1499
1500         /* Allow device to power down */
1501         iwl_release_nic_access(priv);
1502         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1503         return pos;
1504 }
1505
1506 /**
1507  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1508  */
1509 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1510                                       u32 num_wraps, u32 next_entry,
1511                                       u32 size, u32 mode,
1512                                       int pos, char **buf, size_t bufsz)
1513 {
1514         /*
1515          * display the newest DEFAULT_LOG_ENTRIES entries
1516          * i.e the entries just before the next ont that uCode would fill.
1517          */
1518         if (num_wraps) {
1519                 if (next_entry < size) {
1520                         pos = iwl3945_print_event_log(priv,
1521                                              capacity - (size - next_entry),
1522                                              size - next_entry, mode,
1523                                              pos, buf, bufsz);
1524                         pos = iwl3945_print_event_log(priv, 0,
1525                                                       next_entry, mode,
1526                                                       pos, buf, bufsz);
1527                 } else
1528                         pos = iwl3945_print_event_log(priv, next_entry - size,
1529                                                       size, mode,
1530                                                       pos, buf, bufsz);
1531         } else {
1532                 if (next_entry < size)
1533                         pos = iwl3945_print_event_log(priv, 0,
1534                                                       next_entry, mode,
1535                                                       pos, buf, bufsz);
1536                 else
1537                         pos = iwl3945_print_event_log(priv, next_entry - size,
1538                                                       size, mode,
1539                                                       pos, buf, bufsz);
1540         }
1541         return pos;
1542 }
1543
1544 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1545
1546 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1547                             char **buf, bool display)
1548 {
1549         u32 base;       /* SRAM byte address of event log header */
1550         u32 capacity;   /* event log capacity in # entries */
1551         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1552         u32 num_wraps;  /* # times uCode wrapped to top of log */
1553         u32 next_entry; /* index of next entry to be written by uCode */
1554         u32 size;       /* # entries that we'll print */
1555         int pos = 0;
1556         size_t bufsz = 0;
1557
1558         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1559         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1560                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1561                 return  -EINVAL;
1562         }
1563
1564         /* event log header */
1565         capacity = iwl_read_targ_mem(priv, base);
1566         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1567         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1568         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1569
1570         if (capacity > priv->cfg->max_event_log_size) {
1571                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1572                         capacity, priv->cfg->max_event_log_size);
1573                 capacity = priv->cfg->max_event_log_size;
1574         }
1575
1576         if (next_entry > priv->cfg->max_event_log_size) {
1577                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1578                         next_entry, priv->cfg->max_event_log_size);
1579                 next_entry = priv->cfg->max_event_log_size;
1580         }
1581
1582         size = num_wraps ? capacity : next_entry;
1583
1584         /* bail out if nothing in log */
1585         if (size == 0) {
1586                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1587                 return pos;
1588         }
1589
1590 #ifdef CONFIG_IWLWIFI_DEBUG
1591         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1592                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1593                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1594 #else
1595         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1596                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1597 #endif
1598
1599         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1600                   size);
1601
1602 #ifdef CONFIG_IWLWIFI_DEBUG
1603         if (display) {
1604                 if (full_log)
1605                         bufsz = capacity * 48;
1606                 else
1607                         bufsz = size * 48;
1608                 *buf = kmalloc(bufsz, GFP_KERNEL);
1609                 if (!*buf)
1610                         return -ENOMEM;
1611         }
1612         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1613                 /* if uCode has wrapped back to top of log,
1614                  * start at the oldest entry,
1615                  * i.e the next one that uCode would fill.
1616                  */
1617                 if (num_wraps)
1618                         pos = iwl3945_print_event_log(priv, next_entry,
1619                                                 capacity - next_entry, mode,
1620                                                 pos, buf, bufsz);
1621
1622                 /* (then/else) start at top of log */
1623                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1624                                               pos, buf, bufsz);
1625         } else
1626                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1627                                                     next_entry, size, mode,
1628                                                     pos, buf, bufsz);
1629 #else
1630         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1631                                             next_entry, size, mode,
1632                                             pos, buf, bufsz);
1633 #endif
1634         return pos;
1635 }
1636
1637 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1638 {
1639         u32 inta, handled = 0;
1640         u32 inta_fh;
1641         unsigned long flags;
1642 #ifdef CONFIG_IWLWIFI_DEBUG
1643         u32 inta_mask;
1644 #endif
1645
1646         spin_lock_irqsave(&priv->lock, flags);
1647
1648         /* Ack/clear/reset pending uCode interrupts.
1649          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1650          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1651         inta = iwl_read32(priv, CSR_INT);
1652         iwl_write32(priv, CSR_INT, inta);
1653
1654         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1655          * Any new interrupts that happen after this, either while we're
1656          * in this tasklet, or later, will show up in next ISR/tasklet. */
1657         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1658         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1659
1660 #ifdef CONFIG_IWLWIFI_DEBUG
1661         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1662                 /* just for debug */
1663                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1664                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1665                               inta, inta_mask, inta_fh);
1666         }
1667 #endif
1668
1669         spin_unlock_irqrestore(&priv->lock, flags);
1670
1671         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1672          * atomic, make sure that inta covers all the interrupts that
1673          * we've discovered, even if FH interrupt came in just after
1674          * reading CSR_INT. */
1675         if (inta_fh & CSR39_FH_INT_RX_MASK)
1676                 inta |= CSR_INT_BIT_FH_RX;
1677         if (inta_fh & CSR39_FH_INT_TX_MASK)
1678                 inta |= CSR_INT_BIT_FH_TX;
1679
1680         /* Now service all interrupt bits discovered above. */
1681         if (inta & CSR_INT_BIT_HW_ERR) {
1682                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1683
1684                 /* Tell the device to stop sending interrupts */
1685                 iwl_disable_interrupts(priv);
1686
1687                 priv->isr_stats.hw++;
1688                 iwl_irq_handle_error(priv);
1689
1690                 handled |= CSR_INT_BIT_HW_ERR;
1691
1692                 return;
1693         }
1694
1695 #ifdef CONFIG_IWLWIFI_DEBUG
1696         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1697                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1698                 if (inta & CSR_INT_BIT_SCD) {
1699                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1700                                       "the frame/frames.\n");
1701                         priv->isr_stats.sch++;
1702                 }
1703
1704                 /* Alive notification via Rx interrupt will do the real work */
1705                 if (inta & CSR_INT_BIT_ALIVE) {
1706                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1707                         priv->isr_stats.alive++;
1708                 }
1709         }
1710 #endif
1711         /* Safely ignore these bits for debug checks below */
1712         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1713
1714         /* Error detected by uCode */
1715         if (inta & CSR_INT_BIT_SW_ERR) {
1716                 IWL_ERR(priv, "Microcode SW error detected. "
1717                         "Restarting 0x%X.\n", inta);
1718                 priv->isr_stats.sw++;
1719                 priv->isr_stats.sw_err = inta;
1720                 iwl_irq_handle_error(priv);
1721                 handled |= CSR_INT_BIT_SW_ERR;
1722         }
1723
1724         /* uCode wakes up after power-down sleep */
1725         if (inta & CSR_INT_BIT_WAKEUP) {
1726                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1727                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1728                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1729                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1730                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1731                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1732                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1733                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1734
1735                 priv->isr_stats.wakeup++;
1736                 handled |= CSR_INT_BIT_WAKEUP;
1737         }
1738
1739         /* All uCode command responses, including Tx command responses,
1740          * Rx "responses" (frame-received notification), and other
1741          * notifications from uCode come through here*/
1742         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1743                 iwl3945_rx_handle(priv);
1744                 priv->isr_stats.rx++;
1745                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1746         }
1747
1748         if (inta & CSR_INT_BIT_FH_TX) {
1749                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1750                 priv->isr_stats.tx++;
1751
1752                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1753                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1754                                         (FH39_SRVC_CHNL), 0x0);
1755                 handled |= CSR_INT_BIT_FH_TX;
1756         }
1757
1758         if (inta & ~handled) {
1759                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1760                 priv->isr_stats.unhandled++;
1761         }
1762
1763         if (inta & ~priv->inta_mask) {
1764                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1765                          inta & ~priv->inta_mask);
1766                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1767         }
1768
1769         /* Re-enable all interrupts */
1770         /* only Re-enable if disabled by irq */
1771         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1772                 iwl_enable_interrupts(priv);
1773
1774 #ifdef CONFIG_IWLWIFI_DEBUG
1775         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1776                 inta = iwl_read32(priv, CSR_INT);
1777                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1778                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1779                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1780                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1781         }
1782 #endif
1783 }
1784
1785 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1786                                                struct ieee80211_vif *vif,
1787                                                enum ieee80211_band band,
1788                                                struct iwl3945_scan_channel *scan_ch)
1789 {
1790         const struct ieee80211_supported_band *sband;
1791         u16 passive_dwell = 0;
1792         u16 active_dwell = 0;
1793         int added = 0;
1794         u8 channel = 0;
1795
1796         sband = iwl_get_hw_mode(priv, band);
1797         if (!sband) {
1798                 IWL_ERR(priv, "invalid band\n");
1799                 return added;
1800         }
1801
1802         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1803         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1804
1805         if (passive_dwell <= active_dwell)
1806                 passive_dwell = active_dwell + 1;
1807
1808
1809         channel = iwl_get_single_channel_number(priv, band);
1810
1811         if (channel) {
1812                 scan_ch->channel = channel;
1813                 scan_ch->type = 0;      /* passive */
1814                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1815                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1816                 /* Set txpower levels to defaults */
1817                 scan_ch->tpc.dsp_atten = 110;
1818                 if (band == IEEE80211_BAND_5GHZ)
1819                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1820                 else
1821                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1822                 added++;
1823         } else
1824                 IWL_ERR(priv, "no valid channel found\n");
1825         return added;
1826 }
1827
1828 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1829                                          enum ieee80211_band band,
1830                                      u8 is_active, u8 n_probes,
1831                                      struct iwl3945_scan_channel *scan_ch,
1832                                      struct ieee80211_vif *vif)
1833 {
1834         struct ieee80211_channel *chan;
1835         const struct ieee80211_supported_band *sband;
1836         const struct iwl_channel_info *ch_info;
1837         u16 passive_dwell = 0;
1838         u16 active_dwell = 0;
1839         int added, i;
1840
1841         sband = iwl_get_hw_mode(priv, band);
1842         if (!sband)
1843                 return 0;
1844
1845         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1846         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1847
1848         if (passive_dwell <= active_dwell)
1849                 passive_dwell = active_dwell + 1;
1850
1851         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1852                 chan = priv->scan_request->channels[i];
1853
1854                 if (chan->band != band)
1855                         continue;
1856
1857                 scan_ch->channel = chan->hw_value;
1858
1859                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1860                 if (!is_channel_valid(ch_info)) {
1861                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1862                                        scan_ch->channel);
1863                         continue;
1864                 }
1865
1866                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1867                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1868                 /* If passive , set up for auto-switch
1869                  *  and use long active_dwell time.
1870                  */
1871                 if (!is_active || is_channel_passive(ch_info) ||
1872                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1873                         scan_ch->type = 0;      /* passive */
1874                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1875                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1876                 } else {
1877                         scan_ch->type = 1;      /* active */
1878                 }
1879
1880                 /* Set direct probe bits. These may be used both for active
1881                  * scan channels (probes gets sent right away),
1882                  * or for passive channels (probes get se sent only after
1883                  * hearing clear Rx packet).*/
1884                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1885                         if (n_probes)
1886                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1887                 } else {
1888                         /* uCode v1 does not allow setting direct probe bits on
1889                          * passive channel. */
1890                         if ((scan_ch->type & 1) && n_probes)
1891                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1892                 }
1893
1894                 /* Set txpower levels to defaults */
1895                 scan_ch->tpc.dsp_atten = 110;
1896                 /* scan_pwr_info->tpc.dsp_atten; */
1897
1898                 /*scan_pwr_info->tpc.tx_gain; */
1899                 if (band == IEEE80211_BAND_5GHZ)
1900                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1901                 else {
1902                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1903                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1904                          * power level:
1905                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1906                          */
1907                 }
1908
1909                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1910                                scan_ch->channel,
1911                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1912                                (scan_ch->type & 1) ?
1913                                active_dwell : passive_dwell);
1914
1915                 scan_ch++;
1916                 added++;
1917         }
1918
1919         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1920         return added;
1921 }
1922
1923 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1924                               struct ieee80211_rate *rates)
1925 {
1926         int i;
1927
1928         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1929                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1930                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1931                 rates[i].hw_value_short = i;
1932                 rates[i].flags = 0;
1933                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1934                         /*
1935                          * If CCK != 1M then set short preamble rate flag.
1936                          */
1937                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1938                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1939                 }
1940         }
1941 }
1942
1943 /******************************************************************************
1944  *
1945  * uCode download functions
1946  *
1947  ******************************************************************************/
1948
1949 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1950 {
1951         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1952         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1953         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1954         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1955         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1956         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1957 }
1958
1959 /**
1960  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1961  *     looking at all data.
1962  */
1963 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1964 {
1965         u32 val;
1966         u32 save_len = len;
1967         int rc = 0;
1968         u32 errcnt;
1969
1970         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1971
1972         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1973                                IWL39_RTC_INST_LOWER_BOUND);
1974
1975         errcnt = 0;
1976         for (; len > 0; len -= sizeof(u32), image++) {
1977                 /* read data comes through single port, auto-incr addr */
1978                 /* NOTE: Use the debugless read so we don't flood kernel log
1979                  * if IWL_DL_IO is set */
1980                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1981                 if (val != le32_to_cpu(*image)) {
1982                         IWL_ERR(priv, "uCode INST section is invalid at "
1983                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1984                                   save_len - len, val, le32_to_cpu(*image));
1985                         rc = -EIO;
1986                         errcnt++;
1987                         if (errcnt >= 20)
1988                                 break;
1989                 }
1990         }
1991
1992
1993         if (!errcnt)
1994                 IWL_DEBUG_INFO(priv,
1995                         "ucode image in INSTRUCTION memory is good\n");
1996
1997         return rc;
1998 }
1999
2000
2001 /**
2002  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2003  *   using sample data 100 bytes apart.  If these sample points are good,
2004  *   it's a pretty good bet that everything between them is good, too.
2005  */
2006 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2007 {
2008         u32 val;
2009         int rc = 0;
2010         u32 errcnt = 0;
2011         u32 i;
2012
2013         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2014
2015         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2016                 /* read data comes through single port, auto-incr addr */
2017                 /* NOTE: Use the debugless read so we don't flood kernel log
2018                  * if IWL_DL_IO is set */
2019                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2020                         i + IWL39_RTC_INST_LOWER_BOUND);
2021                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2022                 if (val != le32_to_cpu(*image)) {
2023 #if 0 /* Enable this if you want to see details */
2024                         IWL_ERR(priv, "uCode INST section is invalid at "
2025                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2026                                   i, val, *image);
2027 #endif
2028                         rc = -EIO;
2029                         errcnt++;
2030                         if (errcnt >= 3)
2031                                 break;
2032                 }
2033         }
2034
2035         return rc;
2036 }
2037
2038
2039 /**
2040  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2041  *    and verify its contents
2042  */
2043 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2044 {
2045         __le32 *image;
2046         u32 len;
2047         int rc = 0;
2048
2049         /* Try bootstrap */
2050         image = (__le32 *)priv->ucode_boot.v_addr;
2051         len = priv->ucode_boot.len;
2052         rc = iwl3945_verify_inst_sparse(priv, image, len);
2053         if (rc == 0) {
2054                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2055                 return 0;
2056         }
2057
2058         /* Try initialize */
2059         image = (__le32 *)priv->ucode_init.v_addr;
2060         len = priv->ucode_init.len;
2061         rc = iwl3945_verify_inst_sparse(priv, image, len);
2062         if (rc == 0) {
2063                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2064                 return 0;
2065         }
2066
2067         /* Try runtime/protocol */
2068         image = (__le32 *)priv->ucode_code.v_addr;
2069         len = priv->ucode_code.len;
2070         rc = iwl3945_verify_inst_sparse(priv, image, len);
2071         if (rc == 0) {
2072                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2073                 return 0;
2074         }
2075
2076         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2077
2078         /* Since nothing seems to match, show first several data entries in
2079          * instruction SRAM, so maybe visual inspection will give a clue.
2080          * Selection of bootstrap image (vs. other images) is arbitrary. */
2081         image = (__le32 *)priv->ucode_boot.v_addr;
2082         len = priv->ucode_boot.len;
2083         rc = iwl3945_verify_inst_full(priv, image, len);
2084
2085         return rc;
2086 }
2087
2088 static void iwl3945_nic_start(struct iwl_priv *priv)
2089 {
2090         /* Remove all resets to allow NIC to operate */
2091         iwl_write32(priv, CSR_RESET, 0);
2092 }
2093
2094 #define IWL3945_UCODE_GET(item)                                         \
2095 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2096 {                                                                       \
2097         return le32_to_cpu(ucode->u.v1.item);                           \
2098 }
2099
2100 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2101 {
2102         return 24;
2103 }
2104
2105 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2106 {
2107         return (u8 *) ucode->u.v1.data;
2108 }
2109
2110 IWL3945_UCODE_GET(inst_size);
2111 IWL3945_UCODE_GET(data_size);
2112 IWL3945_UCODE_GET(init_size);
2113 IWL3945_UCODE_GET(init_data_size);
2114 IWL3945_UCODE_GET(boot_size);
2115
2116 /**
2117  * iwl3945_read_ucode - Read uCode images from disk file.
2118  *
2119  * Copy into buffers for card to fetch via bus-mastering
2120  */
2121 static int iwl3945_read_ucode(struct iwl_priv *priv)
2122 {
2123         const struct iwl_ucode_header *ucode;
2124         int ret = -EINVAL, index;
2125         const struct firmware *ucode_raw;
2126         /* firmware file name contains uCode/driver compatibility version */
2127         const char *name_pre = priv->cfg->fw_name_pre;
2128         const unsigned int api_max = priv->cfg->ucode_api_max;
2129         const unsigned int api_min = priv->cfg->ucode_api_min;
2130         char buf[25];
2131         u8 *src;
2132         size_t len;
2133         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2134
2135         /* Ask kernel firmware_class module to get the boot firmware off disk.
2136          * request_firmware() is synchronous, file is in memory on return. */
2137         for (index = api_max; index >= api_min; index--) {
2138                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2139                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2140                 if (ret < 0) {
2141                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2142                                   buf, ret);
2143                         if (ret == -ENOENT)
2144                                 continue;
2145                         else
2146                                 goto error;
2147                 } else {
2148                         if (index < api_max)
2149                                 IWL_ERR(priv, "Loaded firmware %s, "
2150                                         "which is deprecated. "
2151                                         " Please use API v%u instead.\n",
2152                                           buf, api_max);
2153                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2154                                        "(%zd bytes) from disk\n",
2155                                        buf, ucode_raw->size);
2156                         break;
2157                 }
2158         }
2159
2160         if (ret < 0)
2161                 goto error;
2162
2163         /* Make sure that we got at least our header! */
2164         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2165                 IWL_ERR(priv, "File size way too small!\n");
2166                 ret = -EINVAL;
2167                 goto err_release;
2168         }
2169
2170         /* Data from ucode file:  header followed by uCode images */
2171         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2172
2173         priv->ucode_ver = le32_to_cpu(ucode->ver);
2174         api_ver = IWL_UCODE_API(priv->ucode_ver);
2175         inst_size = iwl3945_ucode_get_inst_size(ucode);
2176         data_size = iwl3945_ucode_get_data_size(ucode);
2177         init_size = iwl3945_ucode_get_init_size(ucode);
2178         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2179         boot_size = iwl3945_ucode_get_boot_size(ucode);
2180         src = iwl3945_ucode_get_data(ucode);
2181
2182         /* api_ver should match the api version forming part of the
2183          * firmware filename ... but we don't check for that and only rely
2184          * on the API version read from firmware header from here on forward */
2185
2186         if (api_ver < api_min || api_ver > api_max) {
2187                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2188                           "Driver supports v%u, firmware is v%u.\n",
2189                           api_max, api_ver);
2190                 priv->ucode_ver = 0;
2191                 ret = -EINVAL;
2192                 goto err_release;
2193         }
2194         if (api_ver != api_max)
2195                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2196                           "got %u. New firmware can be obtained "
2197                           "from http://www.intellinuxwireless.org.\n",
2198                           api_max, api_ver);
2199
2200         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2201                 IWL_UCODE_MAJOR(priv->ucode_ver),
2202                 IWL_UCODE_MINOR(priv->ucode_ver),
2203                 IWL_UCODE_API(priv->ucode_ver),
2204                 IWL_UCODE_SERIAL(priv->ucode_ver));
2205
2206         snprintf(priv->hw->wiphy->fw_version,
2207                  sizeof(priv->hw->wiphy->fw_version),
2208                  "%u.%u.%u.%u",
2209                  IWL_UCODE_MAJOR(priv->ucode_ver),
2210                  IWL_UCODE_MINOR(priv->ucode_ver),
2211                  IWL_UCODE_API(priv->ucode_ver),
2212                  IWL_UCODE_SERIAL(priv->ucode_ver));
2213
2214         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2215                        priv->ucode_ver);
2216         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2217                        inst_size);
2218         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2219                        data_size);
2220         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2221                        init_size);
2222         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2223                        init_data_size);
2224         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2225                        boot_size);
2226
2227
2228         /* Verify size of file vs. image size info in file's header */
2229         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2230                 inst_size + data_size + init_size +
2231                 init_data_size + boot_size) {
2232
2233                 IWL_DEBUG_INFO(priv,
2234                         "uCode file size %zd does not match expected size\n",
2235                         ucode_raw->size);
2236                 ret = -EINVAL;
2237                 goto err_release;
2238         }
2239
2240         /* Verify that uCode images will fit in card's SRAM */
2241         if (inst_size > IWL39_MAX_INST_SIZE) {
2242                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2243                                inst_size);
2244                 ret = -EINVAL;
2245                 goto err_release;
2246         }
2247
2248         if (data_size > IWL39_MAX_DATA_SIZE) {
2249                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2250                                data_size);
2251                 ret = -EINVAL;
2252                 goto err_release;
2253         }
2254         if (init_size > IWL39_MAX_INST_SIZE) {
2255                 IWL_DEBUG_INFO(priv,
2256                                 "uCode init instr len %d too large to fit in\n",
2257                                 init_size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2262                 IWL_DEBUG_INFO(priv,
2263                                 "uCode init data len %d too large to fit in\n",
2264                                 init_data_size);
2265                 ret = -EINVAL;
2266                 goto err_release;
2267         }
2268         if (boot_size > IWL39_MAX_BSM_SIZE) {
2269                 IWL_DEBUG_INFO(priv,
2270                                 "uCode boot instr len %d too large to fit in\n",
2271                                 boot_size);
2272                 ret = -EINVAL;
2273                 goto err_release;
2274         }
2275
2276         /* Allocate ucode buffers for card's bus-master loading ... */
2277
2278         /* Runtime instructions and 2 copies of data:
2279          * 1) unmodified from disk
2280          * 2) backup cache for save/restore during power-downs */
2281         priv->ucode_code.len = inst_size;
2282         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2283
2284         priv->ucode_data.len = data_size;
2285         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2286
2287         priv->ucode_data_backup.len = data_size;
2288         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2289
2290         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2291             !priv->ucode_data_backup.v_addr)
2292                 goto err_pci_alloc;
2293
2294         /* Initialization instructions and data */
2295         if (init_size && init_data_size) {
2296                 priv->ucode_init.len = init_size;
2297                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2298
2299                 priv->ucode_init_data.len = init_data_size;
2300                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2301
2302                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2303                         goto err_pci_alloc;
2304         }
2305
2306         /* Bootstrap (instructions only, no data) */
2307         if (boot_size) {
2308                 priv->ucode_boot.len = boot_size;
2309                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2310
2311                 if (!priv->ucode_boot.v_addr)
2312                         goto err_pci_alloc;
2313         }
2314
2315         /* Copy images into buffers for card's bus-master reads ... */
2316
2317         /* Runtime instructions (first block of data in file) */
2318         len = inst_size;
2319         IWL_DEBUG_INFO(priv,
2320                 "Copying (but not loading) uCode instr len %zd\n", len);
2321         memcpy(priv->ucode_code.v_addr, src, len);
2322         src += len;
2323
2324         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2325                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2326
2327         /* Runtime data (2nd block)
2328          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2329         len = data_size;
2330         IWL_DEBUG_INFO(priv,
2331                 "Copying (but not loading) uCode data len %zd\n", len);
2332         memcpy(priv->ucode_data.v_addr, src, len);
2333         memcpy(priv->ucode_data_backup.v_addr, src, len);
2334         src += len;
2335
2336         /* Initialization instructions (3rd block) */
2337         if (init_size) {
2338                 len = init_size;
2339                 IWL_DEBUG_INFO(priv,
2340                         "Copying (but not loading) init instr len %zd\n", len);
2341                 memcpy(priv->ucode_init.v_addr, src, len);
2342                 src += len;
2343         }
2344
2345         /* Initialization data (4th block) */
2346         if (init_data_size) {
2347                 len = init_data_size;
2348                 IWL_DEBUG_INFO(priv,
2349                         "Copying (but not loading) init data len %zd\n", len);
2350                 memcpy(priv->ucode_init_data.v_addr, src, len);
2351                 src += len;
2352         }
2353
2354         /* Bootstrap instructions (5th block) */
2355         len = boot_size;
2356         IWL_DEBUG_INFO(priv,
2357                 "Copying (but not loading) boot instr len %zd\n", len);
2358         memcpy(priv->ucode_boot.v_addr, src, len);
2359
2360         /* We have our copies now, allow OS release its copies */
2361         release_firmware(ucode_raw);
2362         return 0;
2363
2364  err_pci_alloc:
2365         IWL_ERR(priv, "failed to allocate pci memory\n");
2366         ret = -ENOMEM;
2367         iwl3945_dealloc_ucode_pci(priv);
2368
2369  err_release:
2370         release_firmware(ucode_raw);
2371
2372  error:
2373         return ret;
2374 }
2375
2376
2377 /**
2378  * iwl3945_set_ucode_ptrs - Set uCode address location
2379  *
2380  * Tell initialization uCode where to find runtime uCode.
2381  *
2382  * BSM registers initially contain pointers to initialization uCode.
2383  * We need to replace them to load runtime uCode inst and data,
2384  * and to save runtime data when powering down.
2385  */
2386 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2387 {
2388         dma_addr_t pinst;
2389         dma_addr_t pdata;
2390
2391         /* bits 31:0 for 3945 */
2392         pinst = priv->ucode_code.p_addr;
2393         pdata = priv->ucode_data_backup.p_addr;
2394
2395         /* Tell bootstrap uCode where to find image to load */
2396         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2397         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2398         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2399                                  priv->ucode_data.len);
2400
2401         /* Inst byte count must be last to set up, bit 31 signals uCode
2402          *   that all new ptr/size info is in place */
2403         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2404                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2405
2406         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2407
2408         return 0;
2409 }
2410
2411 /**
2412  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2413  *
2414  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2415  *
2416  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2417  */
2418 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2419 {
2420         /* Check alive response for "valid" sign from uCode */
2421         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2422                 /* We had an error bringing up the hardware, so take it
2423                  * all the way back down so we can try again */
2424                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2425                 goto restart;
2426         }
2427
2428         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2429          * This is a paranoid check, because we would not have gotten the
2430          * "initialize" alive if code weren't properly loaded.  */
2431         if (iwl3945_verify_ucode(priv)) {
2432                 /* Runtime instruction load was bad;
2433                  * take it all the way back down so we can try again */
2434                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2435                 goto restart;
2436         }
2437
2438         /* Send pointers to protocol/runtime uCode image ... init code will
2439          * load and launch runtime uCode, which will send us another "Alive"
2440          * notification. */
2441         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2442         if (iwl3945_set_ucode_ptrs(priv)) {
2443                 /* Runtime instruction load won't happen;
2444                  * take it all the way back down so we can try again */
2445                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2446                 goto restart;
2447         }
2448         return;
2449
2450  restart:
2451         queue_work(priv->workqueue, &priv->restart);
2452 }
2453
2454 /**
2455  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2456  *                   from protocol/runtime uCode (initialization uCode's
2457  *                   Alive gets handled by iwl3945_init_alive_start()).
2458  */
2459 static void iwl3945_alive_start(struct iwl_priv *priv)
2460 {
2461         int thermal_spin = 0;
2462         u32 rfkill;
2463
2464         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2465
2466         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2467                 /* We had an error bringing up the hardware, so take it
2468                  * all the way back down so we can try again */
2469                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2470                 goto restart;
2471         }
2472
2473         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2474          * This is a paranoid check, because we would not have gotten the
2475          * "runtime" alive if code weren't properly loaded.  */
2476         if (iwl3945_verify_ucode(priv)) {
2477                 /* Runtime instruction load was bad;
2478                  * take it all the way back down so we can try again */
2479                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2480                 goto restart;
2481         }
2482
2483         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2484         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2485
2486         if (rfkill & 0x1) {
2487                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2488                 /* if RFKILL is not on, then wait for thermal
2489                  * sensor in adapter to kick in */
2490                 while (iwl3945_hw_get_temperature(priv) == 0) {
2491                         thermal_spin++;
2492                         udelay(10);
2493                 }
2494
2495                 if (thermal_spin)
2496                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2497                                        thermal_spin * 10);
2498         } else
2499                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2500
2501         /* After the ALIVE response, we can send commands to 3945 uCode */
2502         set_bit(STATUS_ALIVE, &priv->status);
2503
2504         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2505                 /* Enable timer to monitor the driver queues */
2506                 mod_timer(&priv->monitor_recover,
2507                         jiffies +
2508                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2509         }
2510
2511         if (iwl_is_rfkill(priv))
2512                 return;
2513
2514         ieee80211_wake_queues(priv->hw);
2515
2516         priv->active_rate = IWL_RATES_MASK;
2517
2518         iwl_power_update_mode(priv, true);
2519
2520         if (iwl_is_associated(priv)) {
2521                 struct iwl3945_rxon_cmd *active_rxon =
2522                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2523
2524                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2525                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2526         } else {
2527                 /* Initialize our rx_config data */
2528                 iwl_connection_init_rx_config(priv, NULL);
2529         }
2530
2531         /* Configure Bluetooth device coexistence support */
2532         priv->cfg->ops->hcmd->send_bt_config(priv);
2533
2534         /* Configure the adapter for unassociated operation */
2535         iwlcore_commit_rxon(priv);
2536
2537         iwl3945_reg_txpower_periodic(priv);
2538
2539         iwl_leds_init(priv);
2540
2541         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2542         set_bit(STATUS_READY, &priv->status);
2543         wake_up_interruptible(&priv->wait_command_queue);
2544
2545         return;
2546
2547  restart:
2548         queue_work(priv->workqueue, &priv->restart);
2549 }
2550
2551 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2552
2553 static void __iwl3945_down(struct iwl_priv *priv)
2554 {
2555         unsigned long flags;
2556         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2557         struct ieee80211_conf *conf = NULL;
2558
2559         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2560
2561         conf = ieee80211_get_hw_conf(priv->hw);
2562
2563         if (!exit_pending)
2564                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2565
2566         /* Station information will now be cleared in device */
2567         iwl_clear_ucode_stations(priv);
2568         iwl_dealloc_bcast_station(priv);
2569         iwl_clear_driver_stations(priv);
2570
2571         /* Unblock any waiting calls */
2572         wake_up_interruptible_all(&priv->wait_command_queue);
2573
2574         /* Wipe out the EXIT_PENDING status bit if we are not actually
2575          * exiting the module */
2576         if (!exit_pending)
2577                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2578
2579         /* stop and reset the on-board processor */
2580         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2581
2582         /* tell the device to stop sending interrupts */
2583         spin_lock_irqsave(&priv->lock, flags);
2584         iwl_disable_interrupts(priv);
2585         spin_unlock_irqrestore(&priv->lock, flags);
2586         iwl_synchronize_irq(priv);
2587
2588         if (priv->mac80211_registered)
2589                 ieee80211_stop_queues(priv->hw);
2590
2591         /* If we have not previously called iwl3945_init() then
2592          * clear all bits but the RF Kill bits and return */
2593         if (!iwl_is_init(priv)) {
2594                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2595                                         STATUS_RF_KILL_HW |
2596                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2597                                         STATUS_GEO_CONFIGURED |
2598                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2599                                         STATUS_EXIT_PENDING;
2600                 goto exit;
2601         }
2602
2603         /* ...otherwise clear out all the status bits but the RF Kill
2604          * bit and continue taking the NIC down. */
2605         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2606                                 STATUS_RF_KILL_HW |
2607                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2608                                 STATUS_GEO_CONFIGURED |
2609                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2610                                 STATUS_FW_ERROR |
2611                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2612                                 STATUS_EXIT_PENDING;
2613
2614         iwl3945_hw_txq_ctx_stop(priv);
2615         iwl3945_hw_rxq_stop(priv);
2616
2617         /* Power-down device's busmaster DMA clocks */
2618         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2619         udelay(5);
2620
2621         /* Stop the device, and put it in low power state */
2622         priv->cfg->ops->lib->apm_ops.stop(priv);
2623
2624  exit:
2625         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2626
2627         if (priv->ibss_beacon)
2628                 dev_kfree_skb(priv->ibss_beacon);
2629         priv->ibss_beacon = NULL;
2630
2631         /* clear out any free frames */
2632         iwl3945_clear_free_frames(priv);
2633 }
2634
2635 static void iwl3945_down(struct iwl_priv *priv)
2636 {
2637         mutex_lock(&priv->mutex);
2638         __iwl3945_down(priv);
2639         mutex_unlock(&priv->mutex);
2640
2641         iwl3945_cancel_deferred_work(priv);
2642 }
2643
2644 #define MAX_HW_RESTARTS 5
2645
2646 static int __iwl3945_up(struct iwl_priv *priv)
2647 {
2648         int rc, i;
2649
2650         rc = iwl_alloc_bcast_station(priv, false);
2651         if (rc)
2652                 return rc;
2653
2654         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2655                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2656                 return -EIO;
2657         }
2658
2659         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2660                 IWL_ERR(priv, "ucode not available for device bring up\n");
2661                 return -EIO;
2662         }
2663
2664         /* If platform's RF_KILL switch is NOT set to KILL */
2665         if (iwl_read32(priv, CSR_GP_CNTRL) &
2666                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2667                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2668         else {
2669                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2670                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2671                 return -ENODEV;
2672         }
2673
2674         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2675
2676         rc = iwl3945_hw_nic_init(priv);
2677         if (rc) {
2678                 IWL_ERR(priv, "Unable to int nic\n");
2679                 return rc;
2680         }
2681
2682         /* 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,
2685                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2686
2687         /* clear (again), then enable host interrupts */
2688         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2689         iwl_enable_interrupts(priv);
2690
2691         /* really make sure rfkill handshake bits are cleared */
2692         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2693         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2694
2695         /* Copy original ucode data image from disk into backup cache.
2696          * This will be used to initialize the on-board processor's
2697          * data SRAM for a clean start when the runtime program first loads. */
2698         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2699                priv->ucode_data.len);
2700
2701         /* We return success when we resume from suspend and rf_kill is on. */
2702         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2703                 return 0;
2704
2705         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2706
2707                 /* load bootstrap state machine,
2708                  * load bootstrap program into processor's memory,
2709                  * prepare to load the "initialize" uCode */
2710                 rc = priv->cfg->ops->lib->load_ucode(priv);
2711
2712                 if (rc) {
2713                         IWL_ERR(priv,
2714                                 "Unable to set up bootstrap uCode: %d\n", rc);
2715                         continue;
2716                 }
2717
2718                 /* start card; "initialize" will load runtime ucode */
2719                 iwl3945_nic_start(priv);
2720
2721                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2722
2723                 return 0;
2724         }
2725
2726         set_bit(STATUS_EXIT_PENDING, &priv->status);
2727         __iwl3945_down(priv);
2728         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2729
2730         /* tried to restart and config the device for as long as our
2731          * patience could withstand */
2732         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2733         return -EIO;
2734 }
2735
2736
2737 /*****************************************************************************
2738  *
2739  * Workqueue callbacks
2740  *
2741  *****************************************************************************/
2742
2743 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2744 {
2745         struct iwl_priv *priv =
2746             container_of(data, struct iwl_priv, init_alive_start.work);
2747
2748         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2749                 return;
2750
2751         mutex_lock(&priv->mutex);
2752         iwl3945_init_alive_start(priv);
2753         mutex_unlock(&priv->mutex);
2754 }
2755
2756 static void iwl3945_bg_alive_start(struct work_struct *data)
2757 {
2758         struct iwl_priv *priv =
2759             container_of(data, struct iwl_priv, alive_start.work);
2760
2761         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2762                 return;
2763
2764         mutex_lock(&priv->mutex);
2765         iwl3945_alive_start(priv);
2766         mutex_unlock(&priv->mutex);
2767 }
2768
2769 /*
2770  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2771  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2772  * *is* readable even when device has been SW_RESET into low power mode
2773  * (e.g. during RF KILL).
2774  */
2775 static void iwl3945_rfkill_poll(struct work_struct *data)
2776 {
2777         struct iwl_priv *priv =
2778             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2779         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2780         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2781                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2782
2783         if (new_rfkill != old_rfkill) {
2784                 if (new_rfkill)
2785                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2786                 else
2787                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2788
2789                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2790
2791                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2792                                 new_rfkill ? "disable radio" : "enable radio");
2793         }
2794
2795         /* Keep this running, even if radio now enabled.  This will be
2796          * cancelled in mac_start() if system decides to start again */
2797         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2798                            round_jiffies_relative(2 * HZ));
2799
2800 }
2801
2802 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2803 {
2804         struct iwl_host_cmd cmd = {
2805                 .id = REPLY_SCAN_CMD,
2806                 .len = sizeof(struct iwl3945_scan_cmd),
2807                 .flags = CMD_SIZE_HUGE,
2808         };
2809         struct iwl3945_scan_cmd *scan;
2810         struct ieee80211_conf *conf = NULL;
2811         u8 n_probes = 0;
2812         enum ieee80211_band band;
2813         bool is_active = false;
2814
2815         conf = ieee80211_get_hw_conf(priv->hw);
2816
2817         cancel_delayed_work(&priv->scan_check);
2818
2819         if (!iwl_is_ready(priv)) {
2820                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2821                 goto done;
2822         }
2823
2824         /* Make sure the scan wasn't canceled before this queued work
2825          * was given the chance to run... */
2826         if (!test_bit(STATUS_SCANNING, &priv->status))
2827                 goto done;
2828
2829         /* This should never be called or scheduled if there is currently
2830          * a scan active in the hardware. */
2831         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2832                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2833                                 "Ignoring second request.\n");
2834                 goto done;
2835         }
2836
2837         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2838                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2839                 goto done;
2840         }
2841
2842         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2843                 IWL_DEBUG_HC(priv,
2844                         "Scan request while abort pending. Queuing.\n");
2845                 goto done;
2846         }
2847
2848         if (iwl_is_rfkill(priv)) {
2849                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2850                 goto done;
2851         }
2852
2853         if (!test_bit(STATUS_READY, &priv->status)) {
2854                 IWL_DEBUG_HC(priv,
2855                         "Scan request while uninitialized. Queuing.\n");
2856                 goto done;
2857         }
2858
2859         if (!priv->scan_cmd) {
2860                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2861                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2862                 if (!priv->scan_cmd) {
2863                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2864                         goto done;
2865                 }
2866         }
2867         scan = priv->scan_cmd;
2868         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2869
2870         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2871         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2872
2873         if (iwl_is_associated(priv)) {
2874                 u16 interval = 0;
2875                 u32 extra;
2876                 u32 suspend_time = 100;
2877                 u32 scan_suspend_time = 100;
2878                 unsigned long flags;
2879
2880                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2881
2882                 spin_lock_irqsave(&priv->lock, flags);
2883                 interval = vif ? vif->bss_conf.beacon_int : 0;
2884                 spin_unlock_irqrestore(&priv->lock, flags);
2885
2886                 scan->suspend_time = 0;
2887                 scan->max_out_time = cpu_to_le32(200 * 1024);
2888                 if (!interval)
2889                         interval = suspend_time;
2890                 /*
2891                  * suspend time format:
2892                  *  0-19: beacon interval in usec (time before exec.)
2893                  * 20-23: 0
2894                  * 24-31: number of beacons (suspend between channels)
2895                  */
2896
2897                 extra = (suspend_time / interval) << 24;
2898                 scan_suspend_time = 0xFF0FFFFF &
2899                     (extra | ((suspend_time % interval) * 1024));
2900
2901                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2902                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2903                                scan_suspend_time, interval);
2904         }
2905
2906         if (priv->is_internal_short_scan) {
2907                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2908         } else if (priv->scan_request->n_ssids) {
2909                 int i, p = 0;
2910                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2911                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2912                         /* always does wildcard anyway */
2913                         if (!priv->scan_request->ssids[i].ssid_len)
2914                                 continue;
2915                         scan->direct_scan[p].id = WLAN_EID_SSID;
2916                         scan->direct_scan[p].len =
2917                                 priv->scan_request->ssids[i].ssid_len;
2918                         memcpy(scan->direct_scan[p].ssid,
2919                                priv->scan_request->ssids[i].ssid,
2920                                priv->scan_request->ssids[i].ssid_len);
2921                         n_probes++;
2922                         p++;
2923                 }
2924                 is_active = true;
2925         } else
2926                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2927
2928         /* We don't build a direct scan probe request; the uCode will do
2929          * that based on the direct_mask added to each channel entry */
2930         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2931         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2932         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2933
2934         /* flags + rate selection */
2935
2936         switch (priv->scan_band) {
2937         case IEEE80211_BAND_2GHZ:
2938                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2939                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2940                 scan->good_CRC_th = 0;
2941                 band = IEEE80211_BAND_2GHZ;
2942                 break;
2943         case IEEE80211_BAND_5GHZ:
2944                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2945                 /*
2946                  * If active scaning is requested but a certain channel
2947                  * is marked passive, we can do active scanning if we
2948                  * detect transmissions.
2949                  */
2950                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2951                                                 IWL_GOOD_CRC_TH_DISABLED;
2952                 band = IEEE80211_BAND_5GHZ;
2953                 break;
2954         default:
2955                 IWL_WARN(priv, "Invalid scan band\n");
2956                 goto done;
2957         }
2958
2959         if (!priv->is_internal_short_scan) {
2960                 scan->tx_cmd.len = cpu_to_le16(
2961                         iwl_fill_probe_req(priv,
2962                                 (struct ieee80211_mgmt *)scan->data,
2963                                 vif->addr,
2964                                 priv->scan_request->ie,
2965                                 priv->scan_request->ie_len,
2966                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2967         } else {
2968                 /* use bcast addr, will not be transmitted but must be valid */
2969                 scan->tx_cmd.len = cpu_to_le16(
2970                         iwl_fill_probe_req(priv,
2971                                 (struct ieee80211_mgmt *)scan->data,
2972                                 iwl_bcast_addr, NULL, 0,
2973                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2974         }
2975         /* select Rx antennas */
2976         scan->flags |= iwl3945_get_antenna_flags(priv);
2977
2978         if (priv->is_internal_short_scan) {
2979                 scan->channel_count =
2980                         iwl3945_get_single_channel_for_scan(priv, vif, band,
2981                                 (void *)&scan->data[le16_to_cpu(
2982                                 scan->tx_cmd.len)]);
2983         } else {
2984                 scan->channel_count =
2985                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2986                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2987         }
2988
2989         if (scan->channel_count == 0) {
2990                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2991                 goto done;
2992         }
2993
2994         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2995             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2996         cmd.data = scan;
2997         scan->len = cpu_to_le16(cmd.len);
2998
2999         set_bit(STATUS_SCAN_HW, &priv->status);
3000         if (iwl_send_cmd_sync(priv, &cmd))
3001                 goto done;
3002
3003         queue_delayed_work(priv->workqueue, &priv->scan_check,
3004                            IWL_SCAN_CHECK_WATCHDOG);
3005
3006         return;
3007
3008  done:
3009         /* can not perform scan make sure we clear scanning
3010          * bits from status so next scan request can be performed.
3011          * if we dont clear scanning status bit here all next scan
3012          * will fail
3013         */
3014         clear_bit(STATUS_SCAN_HW, &priv->status);
3015         clear_bit(STATUS_SCANNING, &priv->status);
3016
3017         /* inform mac80211 scan aborted */
3018         queue_work(priv->workqueue, &priv->scan_completed);
3019 }
3020
3021 static void iwl3945_bg_restart(struct work_struct *data)
3022 {
3023         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3024
3025         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3026                 return;
3027
3028         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3029                 mutex_lock(&priv->mutex);
3030                 priv->vif = NULL;
3031                 priv->is_open = 0;
3032                 mutex_unlock(&priv->mutex);
3033                 iwl3945_down(priv);
3034                 ieee80211_restart_hw(priv->hw);
3035         } else {
3036                 iwl3945_down(priv);
3037
3038                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3039                         return;
3040
3041                 mutex_lock(&priv->mutex);
3042                 __iwl3945_up(priv);
3043                 mutex_unlock(&priv->mutex);
3044         }
3045 }
3046
3047 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3048 {
3049         struct iwl_priv *priv =
3050             container_of(data, struct iwl_priv, rx_replenish);
3051
3052         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3053                 return;
3054
3055         mutex_lock(&priv->mutex);
3056         iwl3945_rx_replenish(priv);
3057         mutex_unlock(&priv->mutex);
3058 }
3059
3060 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3061 {
3062         int rc = 0;
3063         struct ieee80211_conf *conf = NULL;
3064
3065         if (!vif || !priv->is_open)
3066                 return;
3067
3068         if (vif->type == NL80211_IFTYPE_AP) {
3069                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3070                 return;
3071         }
3072
3073         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3074                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3075
3076         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3077                 return;
3078
3079         iwl_scan_cancel_timeout(priv, 200);
3080
3081         conf = ieee80211_get_hw_conf(priv->hw);
3082
3083         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3084         iwlcore_commit_rxon(priv);
3085
3086         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3087         iwl_setup_rxon_timing(priv, vif);
3088         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3089                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3090         if (rc)
3091                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3092                             "Attempting to continue.\n");
3093
3094         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3095
3096         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3097
3098         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3099                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3100
3101         if (vif->bss_conf.use_short_preamble)
3102                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3103         else
3104                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3105
3106         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3107                 if (vif->bss_conf.use_short_slot)
3108                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3109                 else
3110                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3111         }
3112
3113         iwlcore_commit_rxon(priv);
3114
3115         switch (vif->type) {
3116         case NL80211_IFTYPE_STATION:
3117                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3118                 break;
3119         case NL80211_IFTYPE_ADHOC:
3120                 iwl3945_send_beacon_cmd(priv);
3121                 break;
3122         default:
3123                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3124                         __func__, vif->type);
3125                 break;
3126         }
3127 }
3128
3129 /*****************************************************************************
3130  *
3131  * mac80211 entry point functions
3132  *
3133  *****************************************************************************/
3134
3135 #define UCODE_READY_TIMEOUT     (2 * HZ)
3136
3137 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3138 {
3139         struct iwl_priv *priv = hw->priv;
3140         int ret;
3141
3142         IWL_DEBUG_MAC80211(priv, "enter\n");
3143
3144         /* we should be verifying the device is ready to be opened */
3145         mutex_lock(&priv->mutex);
3146
3147         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3148          * ucode filename and max sizes are card-specific. */
3149
3150         if (!priv->ucode_code.len) {
3151                 ret = iwl3945_read_ucode(priv);
3152                 if (ret) {
3153                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3154                         mutex_unlock(&priv->mutex);
3155                         goto out_release_irq;
3156                 }
3157         }
3158
3159         ret = __iwl3945_up(priv);
3160
3161         mutex_unlock(&priv->mutex);
3162
3163         if (ret)
3164                 goto out_release_irq;
3165
3166         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3167
3168         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3169          * mac80211 will not be run successfully. */
3170         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3171                         test_bit(STATUS_READY, &priv->status),
3172                         UCODE_READY_TIMEOUT);
3173         if (!ret) {
3174                 if (!test_bit(STATUS_READY, &priv->status)) {
3175                         IWL_ERR(priv,
3176                                 "Wait for START_ALIVE timeout after %dms.\n",
3177                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3178                         ret = -ETIMEDOUT;
3179                         goto out_release_irq;
3180                 }
3181         }
3182
3183         /* ucode is running and will send rfkill notifications,
3184          * no need to poll the killswitch state anymore */
3185         cancel_delayed_work(&priv->_3945.rfkill_poll);
3186
3187         iwl_led_start(priv);
3188
3189         priv->is_open = 1;
3190         IWL_DEBUG_MAC80211(priv, "leave\n");
3191         return 0;
3192
3193 out_release_irq:
3194         priv->is_open = 0;
3195         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3196         return ret;
3197 }
3198
3199 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3200 {
3201         struct iwl_priv *priv = hw->priv;
3202
3203         IWL_DEBUG_MAC80211(priv, "enter\n");
3204
3205         if (!priv->is_open) {
3206                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3207                 return;
3208         }
3209
3210         priv->is_open = 0;
3211
3212         if (iwl_is_ready_rf(priv)) {
3213                 /* stop mac, cancel any scan request and clear
3214                  * RXON_FILTER_ASSOC_MSK BIT
3215                  */
3216                 mutex_lock(&priv->mutex);
3217                 iwl_scan_cancel_timeout(priv, 100);
3218                 mutex_unlock(&priv->mutex);
3219         }
3220
3221         iwl3945_down(priv);
3222
3223         flush_workqueue(priv->workqueue);
3224
3225         /* start polling the killswitch state again */
3226         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3227                            round_jiffies_relative(2 * HZ));
3228
3229         IWL_DEBUG_MAC80211(priv, "leave\n");
3230 }
3231
3232 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3233 {
3234         struct iwl_priv *priv = hw->priv;
3235
3236         IWL_DEBUG_MAC80211(priv, "enter\n");
3237
3238         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3239                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3240
3241         if (iwl3945_tx_skb(priv, skb))
3242                 dev_kfree_skb_any(skb);
3243
3244         IWL_DEBUG_MAC80211(priv, "leave\n");
3245         return NETDEV_TX_OK;
3246 }
3247
3248 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3249 {
3250         int rc = 0;
3251
3252         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3253                 return;
3254
3255         /* The following should be done only at AP bring up */
3256         if (!(iwl_is_associated(priv))) {
3257
3258                 /* RXON - unassoc (to set timing command) */
3259                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3260                 iwlcore_commit_rxon(priv);
3261
3262                 /* RXON Timing */
3263                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3264                 iwl_setup_rxon_timing(priv, vif);
3265                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3266                                       sizeof(priv->rxon_timing),
3267                                       &priv->rxon_timing);
3268                 if (rc)
3269                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3270                                         "Attempting to continue.\n");
3271
3272                 priv->staging_rxon.assoc_id = 0;
3273
3274                 if (vif->bss_conf.use_short_preamble)
3275                         priv->staging_rxon.flags |=
3276                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3277                 else
3278                         priv->staging_rxon.flags &=
3279                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3280
3281                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3282                         if (vif->bss_conf.use_short_slot)
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                 /* restore RXON assoc */
3290                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3291                 iwlcore_commit_rxon(priv);
3292         }
3293         iwl3945_send_beacon_cmd(priv);
3294
3295         /* FIXME - we need to add code here to detect a totally new
3296          * configuration, reset the AP, unassoc, rxon timing, assoc,
3297          * clear sta table, add BCAST sta... */
3298 }
3299
3300 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3301                                struct ieee80211_vif *vif,
3302                                struct ieee80211_sta *sta,
3303                                struct ieee80211_key_conf *key)
3304 {
3305         struct iwl_priv *priv = hw->priv;
3306         int ret = 0;
3307         u8 sta_id = IWL_INVALID_STATION;
3308         u8 static_key;
3309
3310         IWL_DEBUG_MAC80211(priv, "enter\n");
3311
3312         if (iwl3945_mod_params.sw_crypto) {
3313                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3314                 return -EOPNOTSUPP;
3315         }
3316
3317         static_key = !iwl_is_associated(priv);
3318
3319         if (!static_key) {
3320                 sta_id = iwl_sta_id_or_broadcast(priv, sta);
3321                 if (sta_id == IWL_INVALID_STATION)
3322                         return -EINVAL;
3323         }
3324
3325         mutex_lock(&priv->mutex);
3326         iwl_scan_cancel_timeout(priv, 100);
3327
3328         switch (cmd) {
3329         case SET_KEY:
3330                 if (static_key)
3331                         ret = iwl3945_set_static_key(priv, key);
3332                 else
3333                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3334                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3335                 break;
3336         case DISABLE_KEY:
3337                 if (static_key)
3338                         ret = iwl3945_remove_static_key(priv);
3339                 else
3340                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3341                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3342                 break;
3343         default:
3344                 ret = -EINVAL;
3345         }
3346
3347         mutex_unlock(&priv->mutex);
3348         IWL_DEBUG_MAC80211(priv, "leave\n");
3349
3350         return ret;
3351 }
3352
3353 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3354                                struct ieee80211_vif *vif,
3355                                struct ieee80211_sta *sta)
3356 {
3357         struct iwl_priv *priv = hw->priv;
3358         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3359         int ret;
3360         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3361         u8 sta_id;
3362
3363         sta_priv->common.sta_id = IWL_INVALID_STATION;
3364
3365         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3366                         sta->addr);
3367
3368         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3369                                      &sta_id);
3370         if (ret) {
3371                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3372                         sta->addr, ret);
3373                 /* Should we return success if return code is EEXIST ? */
3374                 return ret;
3375         }
3376
3377         sta_priv->common.sta_id = sta_id;
3378
3379         /* Initialize rate scaling */
3380         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3381                        sta->addr);
3382         iwl3945_rs_rate_init(priv, sta, sta_id);
3383
3384         return 0;
3385 }
3386 /*****************************************************************************
3387  *
3388  * sysfs attributes
3389  *
3390  *****************************************************************************/
3391
3392 #ifdef CONFIG_IWLWIFI_DEBUG
3393
3394 /*
3395  * The following adds a new attribute to the sysfs representation
3396  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3397  * used for controlling the debug level.
3398  *
3399  * See the level definitions in iwl for details.
3400  *
3401  * The debug_level being managed using sysfs below is a per device debug
3402  * level that is used instead of the global debug level if it (the per
3403  * device debug level) is set.
3404  */
3405 static ssize_t show_debug_level(struct device *d,
3406                                 struct device_attribute *attr, char *buf)
3407 {
3408         struct iwl_priv *priv = dev_get_drvdata(d);
3409         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3410 }
3411 static ssize_t store_debug_level(struct device *d,
3412                                 struct device_attribute *attr,
3413                                  const char *buf, size_t count)
3414 {
3415         struct iwl_priv *priv = dev_get_drvdata(d);
3416         unsigned long val;
3417         int ret;
3418
3419         ret = strict_strtoul(buf, 0, &val);
3420         if (ret)
3421                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3422         else {
3423                 priv->debug_level = val;
3424                 if (iwl_alloc_traffic_mem(priv))
3425                         IWL_ERR(priv,
3426                                 "Not enough memory to generate traffic log\n");
3427         }
3428         return strnlen(buf, count);
3429 }
3430
3431 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3432                         show_debug_level, store_debug_level);
3433
3434 #endif /* CONFIG_IWLWIFI_DEBUG */
3435
3436 static ssize_t show_temperature(struct device *d,
3437                                 struct device_attribute *attr, char *buf)
3438 {
3439         struct iwl_priv *priv = dev_get_drvdata(d);
3440
3441         if (!iwl_is_alive(priv))
3442                 return -EAGAIN;
3443
3444         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3445 }
3446
3447 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3448
3449 static ssize_t show_tx_power(struct device *d,
3450                              struct device_attribute *attr, char *buf)
3451 {
3452         struct iwl_priv *priv = dev_get_drvdata(d);
3453         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3454 }
3455
3456 static ssize_t store_tx_power(struct device *d,
3457                               struct device_attribute *attr,
3458                               const char *buf, size_t count)
3459 {
3460         struct iwl_priv *priv = dev_get_drvdata(d);
3461         char *p = (char *)buf;
3462         u32 val;
3463
3464         val = simple_strtoul(p, &p, 10);
3465         if (p == buf)
3466                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3467         else
3468                 iwl3945_hw_reg_set_txpower(priv, val);
3469
3470         return count;
3471 }
3472
3473 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3474
3475 static ssize_t show_flags(struct device *d,
3476                           struct device_attribute *attr, char *buf)
3477 {
3478         struct iwl_priv *priv = dev_get_drvdata(d);
3479
3480         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3481 }
3482
3483 static ssize_t store_flags(struct device *d,
3484                            struct device_attribute *attr,
3485                            const char *buf, size_t count)
3486 {
3487         struct iwl_priv *priv = dev_get_drvdata(d);
3488         u32 flags = simple_strtoul(buf, NULL, 0);
3489
3490         mutex_lock(&priv->mutex);
3491         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3492                 /* Cancel any currently running scans... */
3493                 if (iwl_scan_cancel_timeout(priv, 100))
3494                         IWL_WARN(priv, "Could not cancel scan.\n");
3495                 else {
3496                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3497                                        flags);
3498                         priv->staging_rxon.flags = cpu_to_le32(flags);
3499                         iwlcore_commit_rxon(priv);
3500                 }
3501         }
3502         mutex_unlock(&priv->mutex);
3503
3504         return count;
3505 }
3506
3507 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3508
3509 static ssize_t show_filter_flags(struct device *d,
3510                                  struct device_attribute *attr, char *buf)
3511 {
3512         struct iwl_priv *priv = dev_get_drvdata(d);
3513
3514         return sprintf(buf, "0x%04X\n",
3515                 le32_to_cpu(priv->active_rxon.filter_flags));
3516 }
3517
3518 static ssize_t store_filter_flags(struct device *d,
3519                                   struct device_attribute *attr,
3520                                   const char *buf, size_t count)
3521 {
3522         struct iwl_priv *priv = dev_get_drvdata(d);
3523         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3524
3525         mutex_lock(&priv->mutex);
3526         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3527                 /* Cancel any currently running scans... */
3528                 if (iwl_scan_cancel_timeout(priv, 100))
3529                         IWL_WARN(priv, "Could not cancel scan.\n");
3530                 else {
3531                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3532                                        "0x%04X\n", filter_flags);
3533                         priv->staging_rxon.filter_flags =
3534                                 cpu_to_le32(filter_flags);
3535                         iwlcore_commit_rxon(priv);
3536                 }
3537         }
3538         mutex_unlock(&priv->mutex);
3539
3540         return count;
3541 }
3542
3543 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3544                    store_filter_flags);
3545
3546 static ssize_t show_measurement(struct device *d,
3547                                 struct device_attribute *attr, char *buf)
3548 {
3549         struct iwl_priv *priv = dev_get_drvdata(d);
3550         struct iwl_spectrum_notification measure_report;
3551         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3552         u8 *data = (u8 *)&measure_report;
3553         unsigned long flags;
3554
3555         spin_lock_irqsave(&priv->lock, flags);
3556         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3557                 spin_unlock_irqrestore(&priv->lock, flags);
3558                 return 0;
3559         }
3560         memcpy(&measure_report, &priv->measure_report, size);
3561         priv->measurement_status = 0;
3562         spin_unlock_irqrestore(&priv->lock, flags);
3563
3564         while (size && (PAGE_SIZE - len)) {
3565                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3566                                    PAGE_SIZE - len, 1);
3567                 len = strlen(buf);
3568                 if (PAGE_SIZE - len)
3569                         buf[len++] = '\n';
3570
3571                 ofs += 16;
3572                 size -= min(size, 16U);
3573         }
3574
3575         return len;
3576 }
3577
3578 static ssize_t store_measurement(struct device *d,
3579                                  struct device_attribute *attr,
3580                                  const char *buf, size_t count)
3581 {
3582         struct iwl_priv *priv = dev_get_drvdata(d);
3583         struct ieee80211_measurement_params params = {
3584                 .channel = le16_to_cpu(priv->active_rxon.channel),
3585                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3586                 .duration = cpu_to_le16(1),
3587         };
3588         u8 type = IWL_MEASURE_BASIC;
3589         u8 buffer[32];
3590         u8 channel;
3591
3592         if (count) {
3593                 char *p = buffer;
3594                 strncpy(buffer, buf, min(sizeof(buffer), count));
3595                 channel = simple_strtoul(p, NULL, 0);
3596                 if (channel)
3597                         params.channel = channel;
3598
3599                 p = buffer;
3600                 while (*p && *p != ' ')
3601                         p++;
3602                 if (*p)
3603                         type = simple_strtoul(p + 1, NULL, 0);
3604         }
3605
3606         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3607                        "channel %d (for '%s')\n", type, params.channel, buf);
3608         iwl3945_get_measurement(priv, &params, type);
3609
3610         return count;
3611 }
3612
3613 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3614                    show_measurement, store_measurement);
3615
3616 static ssize_t store_retry_rate(struct device *d,
3617                                 struct device_attribute *attr,
3618                                 const char *buf, size_t count)
3619 {
3620         struct iwl_priv *priv = dev_get_drvdata(d);
3621
3622         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3623         if (priv->retry_rate <= 0)
3624                 priv->retry_rate = 1;
3625
3626         return count;
3627 }
3628
3629 static ssize_t show_retry_rate(struct device *d,
3630                                struct device_attribute *attr, char *buf)
3631 {
3632         struct iwl_priv *priv = dev_get_drvdata(d);
3633         return sprintf(buf, "%d", priv->retry_rate);
3634 }
3635
3636 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3637                    store_retry_rate);
3638
3639
3640 static ssize_t show_channels(struct device *d,
3641                              struct device_attribute *attr, char *buf)
3642 {
3643         /* all this shit doesn't belong into sysfs anyway */
3644         return 0;
3645 }
3646
3647 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3648
3649 static ssize_t show_antenna(struct device *d,
3650                             struct device_attribute *attr, char *buf)
3651 {
3652         struct iwl_priv *priv = dev_get_drvdata(d);
3653
3654         if (!iwl_is_alive(priv))
3655                 return -EAGAIN;
3656
3657         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3658 }
3659
3660 static ssize_t store_antenna(struct device *d,
3661                              struct device_attribute *attr,
3662                              const char *buf, size_t count)
3663 {
3664         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3665         int ant;
3666
3667         if (count == 0)
3668                 return 0;
3669
3670         if (sscanf(buf, "%1i", &ant) != 1) {
3671                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3672                 return count;
3673         }
3674
3675         if ((ant >= 0) && (ant <= 2)) {
3676                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3677                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3678         } else
3679                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3680
3681
3682         return count;
3683 }
3684
3685 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3686
3687 static ssize_t show_status(struct device *d,
3688                            struct device_attribute *attr, char *buf)
3689 {
3690         struct iwl_priv *priv = dev_get_drvdata(d);
3691         if (!iwl_is_alive(priv))
3692                 return -EAGAIN;
3693         return sprintf(buf, "0x%08x\n", (int)priv->status);
3694 }
3695
3696 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3697
3698 static ssize_t dump_error_log(struct device *d,
3699                               struct device_attribute *attr,
3700                               const char *buf, size_t count)
3701 {
3702         struct iwl_priv *priv = dev_get_drvdata(d);
3703         char *p = (char *)buf;
3704
3705         if (p[0] == '1')
3706                 iwl3945_dump_nic_error_log(priv);
3707
3708         return strnlen(buf, count);
3709 }
3710
3711 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3712
3713 /*****************************************************************************
3714  *
3715  * driver setup and tear down
3716  *
3717  *****************************************************************************/
3718
3719 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3720 {
3721         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3722
3723         init_waitqueue_head(&priv->wait_command_queue);
3724
3725         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3726         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3727         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3728         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3729         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3730         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3731         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3732         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3733         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3734         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3735
3736         iwl3945_hw_setup_deferred_work(priv);
3737
3738         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3739                 init_timer(&priv->monitor_recover);
3740                 priv->monitor_recover.data = (unsigned long)priv;
3741                 priv->monitor_recover.function =
3742                         priv->cfg->ops->lib->recover_from_tx_stall;
3743         }
3744
3745         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3746                      iwl3945_irq_tasklet, (unsigned long)priv);
3747 }
3748
3749 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3750 {
3751         iwl3945_hw_cancel_deferred_work(priv);
3752
3753         cancel_delayed_work_sync(&priv->init_alive_start);
3754         cancel_delayed_work(&priv->scan_check);
3755         cancel_delayed_work(&priv->alive_start);
3756         cancel_work_sync(&priv->start_internal_scan);
3757         cancel_work_sync(&priv->beacon_update);
3758         if (priv->cfg->ops->lib->recover_from_tx_stall)
3759                 del_timer_sync(&priv->monitor_recover);
3760 }
3761
3762 static struct attribute *iwl3945_sysfs_entries[] = {
3763         &dev_attr_antenna.attr,
3764         &dev_attr_channels.attr,
3765         &dev_attr_dump_errors.attr,
3766         &dev_attr_flags.attr,
3767         &dev_attr_filter_flags.attr,
3768         &dev_attr_measurement.attr,
3769         &dev_attr_retry_rate.attr,
3770         &dev_attr_status.attr,
3771         &dev_attr_temperature.attr,
3772         &dev_attr_tx_power.attr,
3773 #ifdef CONFIG_IWLWIFI_DEBUG
3774         &dev_attr_debug_level.attr,
3775 #endif
3776         NULL
3777 };
3778
3779 static struct attribute_group iwl3945_attribute_group = {
3780         .name = NULL,           /* put in device directory */
3781         .attrs = iwl3945_sysfs_entries,
3782 };
3783
3784 static struct ieee80211_ops iwl3945_hw_ops = {
3785         .tx = iwl3945_mac_tx,
3786         .start = iwl3945_mac_start,
3787         .stop = iwl3945_mac_stop,
3788         .add_interface = iwl_mac_add_interface,
3789         .remove_interface = iwl_mac_remove_interface,
3790         .config = iwl_mac_config,
3791         .configure_filter = iwl_configure_filter,
3792         .set_key = iwl3945_mac_set_key,
3793         .conf_tx = iwl_mac_conf_tx,
3794         .reset_tsf = iwl_mac_reset_tsf,
3795         .bss_info_changed = iwl_bss_info_changed,
3796         .hw_scan = iwl_mac_hw_scan,
3797         .sta_add = iwl3945_mac_sta_add,
3798         .sta_remove = iwl_mac_sta_remove,
3799 };
3800
3801 static int iwl3945_init_drv(struct iwl_priv *priv)
3802 {
3803         int ret;
3804         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3805
3806         priv->retry_rate = 1;
3807         priv->ibss_beacon = NULL;
3808
3809         spin_lock_init(&priv->sta_lock);
3810         spin_lock_init(&priv->hcmd_lock);
3811
3812         INIT_LIST_HEAD(&priv->free_frames);
3813
3814         mutex_init(&priv->mutex);
3815         mutex_init(&priv->sync_cmd_mutex);
3816
3817         priv->ieee_channels = NULL;
3818         priv->ieee_rates = NULL;
3819         priv->band = IEEE80211_BAND_2GHZ;
3820
3821         priv->iw_mode = NL80211_IFTYPE_STATION;
3822         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3823
3824         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3825
3826         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3827                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3828                          eeprom->version);
3829                 ret = -EINVAL;
3830                 goto err;
3831         }
3832         ret = iwl_init_channel_map(priv);
3833         if (ret) {
3834                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3835                 goto err;
3836         }
3837
3838         /* Set up txpower settings in driver for all channels */
3839         if (iwl3945_txpower_set_from_eeprom(priv)) {
3840                 ret = -EIO;
3841                 goto err_free_channel_map;
3842         }
3843
3844         ret = iwlcore_init_geos(priv);
3845         if (ret) {
3846                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3847                 goto err_free_channel_map;
3848         }
3849         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3850
3851         return 0;
3852
3853 err_free_channel_map:
3854         iwl_free_channel_map(priv);
3855 err:
3856         return ret;
3857 }
3858
3859 #define IWL3945_MAX_PROBE_REQUEST       200
3860
3861 static int iwl3945_setup_mac(struct iwl_priv *priv)
3862 {
3863         int ret;
3864         struct ieee80211_hw *hw = priv->hw;
3865
3866         hw->rate_control_algorithm = "iwl-3945-rs";
3867         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3868         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3869
3870         /* Tell mac80211 our characteristics */
3871         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3872                     IEEE80211_HW_SPECTRUM_MGMT;
3873
3874         if (!priv->cfg->broken_powersave)
3875                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3876                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3877
3878         hw->wiphy->interface_modes =
3879                 BIT(NL80211_IFTYPE_STATION) |
3880                 BIT(NL80211_IFTYPE_ADHOC);
3881
3882         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3883                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3884
3885         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3886         /* we create the 802.11 header and a zero-length SSID element */
3887         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3888
3889         /* Default value; 4 EDCA QOS priorities */
3890         hw->queues = 4;
3891
3892         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3893                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3894                         &priv->bands[IEEE80211_BAND_2GHZ];
3895
3896         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3897                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3898                         &priv->bands[IEEE80211_BAND_5GHZ];
3899
3900         ret = ieee80211_register_hw(priv->hw);
3901         if (ret) {
3902                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3903                 return ret;
3904         }
3905         priv->mac80211_registered = 1;
3906
3907         return 0;
3908 }
3909
3910 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3911 {
3912         int err = 0;
3913         struct iwl_priv *priv;
3914         struct ieee80211_hw *hw;
3915         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3916         struct iwl3945_eeprom *eeprom;
3917         unsigned long flags;
3918
3919         /***********************
3920          * 1. Allocating HW data
3921          * ********************/
3922
3923         /* mac80211 allocates memory for this device instance, including
3924          *   space for this driver's private structure */
3925         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3926         if (hw == NULL) {
3927                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3928                 err = -ENOMEM;
3929                 goto out;
3930         }
3931         priv = hw->priv;
3932         SET_IEEE80211_DEV(hw, &pdev->dev);
3933
3934         /*
3935          * Disabling hardware scan means that mac80211 will perform scans
3936          * "the hard way", rather than using device's scan.
3937          */
3938         if (iwl3945_mod_params.disable_hw_scan) {
3939                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3940                 iwl3945_hw_ops.hw_scan = NULL;
3941         }
3942
3943
3944         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3945         priv->cfg = cfg;
3946         priv->pci_dev = pdev;
3947         priv->inta_mask = CSR_INI_SET_MASK;
3948
3949         if (iwl_alloc_traffic_mem(priv))
3950                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3951
3952         /***************************
3953          * 2. Initializing PCI bus
3954          * *************************/
3955         if (pci_enable_device(pdev)) {
3956                 err = -ENODEV;
3957                 goto out_ieee80211_free_hw;
3958         }
3959
3960         pci_set_master(pdev);
3961
3962         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3963         if (!err)
3964                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3965         if (err) {
3966                 IWL_WARN(priv, "No suitable DMA available.\n");
3967                 goto out_pci_disable_device;
3968         }
3969
3970         pci_set_drvdata(pdev, priv);
3971         err = pci_request_regions(pdev, DRV_NAME);
3972         if (err)
3973                 goto out_pci_disable_device;
3974
3975         /***********************
3976          * 3. Read REV Register
3977          * ********************/
3978         priv->hw_base = pci_iomap(pdev, 0, 0);
3979         if (!priv->hw_base) {
3980                 err = -ENODEV;
3981                 goto out_pci_release_regions;
3982         }
3983
3984         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3985                         (unsigned long long) pci_resource_len(pdev, 0));
3986         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3987
3988         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3989          * PCI Tx retries from interfering with C3 CPU state */
3990         pci_write_config_byte(pdev, 0x41, 0x00);
3991
3992         /* these spin locks will be used in apm_ops.init and EEPROM access
3993          * we should init now
3994          */
3995         spin_lock_init(&priv->reg_lock);
3996         spin_lock_init(&priv->lock);
3997
3998         /*
3999          * stop and reset the on-board processor just in case it is in a
4000          * strange state ... like being left stranded by a primary kernel
4001          * and this is now the kdump kernel trying to start up
4002          */
4003         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4004
4005         /***********************
4006          * 4. Read EEPROM
4007          * ********************/
4008
4009         /* Read the EEPROM */
4010         err = iwl_eeprom_init(priv);
4011         if (err) {
4012                 IWL_ERR(priv, "Unable to init EEPROM\n");
4013                 goto out_iounmap;
4014         }
4015         /* MAC Address location in EEPROM same for 3945/4965 */
4016         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4017         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
4018         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
4019
4020         /***********************
4021          * 5. Setup HW Constants
4022          * ********************/
4023         /* Device-specific setup */
4024         if (iwl3945_hw_set_hw_params(priv)) {
4025                 IWL_ERR(priv, "failed to set hw settings\n");
4026                 goto out_eeprom_free;
4027         }
4028
4029         /***********************
4030          * 6. Setup priv
4031          * ********************/
4032
4033         err = iwl3945_init_drv(priv);
4034         if (err) {
4035                 IWL_ERR(priv, "initializing driver failed\n");
4036                 goto out_unset_hw_params;
4037         }
4038
4039         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4040                 priv->cfg->name);
4041
4042         /***********************
4043          * 7. Setup Services
4044          * ********************/
4045
4046         spin_lock_irqsave(&priv->lock, flags);
4047         iwl_disable_interrupts(priv);
4048         spin_unlock_irqrestore(&priv->lock, flags);
4049
4050         pci_enable_msi(priv->pci_dev);
4051
4052         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4053                           IRQF_SHARED, DRV_NAME, priv);
4054         if (err) {
4055                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4056                 goto out_disable_msi;
4057         }
4058
4059         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4060         if (err) {
4061                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4062                 goto out_release_irq;
4063         }
4064
4065         iwl_set_rxon_channel(priv,
4066                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4067         iwl3945_setup_deferred_work(priv);
4068         iwl3945_setup_rx_handlers(priv);
4069         iwl_power_initialize(priv);
4070
4071         /*********************************
4072          * 8. Setup and Register mac80211
4073          * *******************************/
4074
4075         iwl_enable_interrupts(priv);
4076
4077         err = iwl3945_setup_mac(priv);
4078         if (err)
4079                 goto  out_remove_sysfs;
4080
4081         err = iwl_dbgfs_register(priv, DRV_NAME);
4082         if (err)
4083                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4084
4085         /* Start monitoring the killswitch */
4086         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4087                            2 * HZ);
4088
4089         return 0;
4090
4091  out_remove_sysfs:
4092         destroy_workqueue(priv->workqueue);
4093         priv->workqueue = NULL;
4094         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4095  out_release_irq:
4096         free_irq(priv->pci_dev->irq, priv);
4097  out_disable_msi:
4098         pci_disable_msi(priv->pci_dev);
4099         iwlcore_free_geos(priv);
4100         iwl_free_channel_map(priv);
4101  out_unset_hw_params:
4102         iwl3945_unset_hw_params(priv);
4103  out_eeprom_free:
4104         iwl_eeprom_free(priv);
4105  out_iounmap:
4106         pci_iounmap(pdev, priv->hw_base);
4107  out_pci_release_regions:
4108         pci_release_regions(pdev);
4109  out_pci_disable_device:
4110         pci_set_drvdata(pdev, NULL);
4111         pci_disable_device(pdev);
4112  out_ieee80211_free_hw:
4113         iwl_free_traffic_mem(priv);
4114         ieee80211_free_hw(priv->hw);
4115  out:
4116         return err;
4117 }
4118
4119 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4120 {
4121         struct iwl_priv *priv = pci_get_drvdata(pdev);
4122         unsigned long flags;
4123
4124         if (!priv)
4125                 return;
4126
4127         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4128
4129         iwl_dbgfs_unregister(priv);
4130
4131         set_bit(STATUS_EXIT_PENDING, &priv->status);
4132
4133         if (priv->mac80211_registered) {
4134                 ieee80211_unregister_hw(priv->hw);
4135                 priv->mac80211_registered = 0;
4136         } else {
4137                 iwl3945_down(priv);
4138         }
4139
4140         /*
4141          * Make sure device is reset to low power before unloading driver.
4142          * This may be redundant with iwl_down(), but there are paths to
4143          * run iwl_down() without calling apm_ops.stop(), and there are
4144          * paths to avoid running iwl_down() at all before leaving driver.
4145          * This (inexpensive) call *makes sure* device is reset.
4146          */
4147         priv->cfg->ops->lib->apm_ops.stop(priv);
4148
4149         /* make sure we flush any pending irq or
4150          * tasklet for the driver
4151          */
4152         spin_lock_irqsave(&priv->lock, flags);
4153         iwl_disable_interrupts(priv);
4154         spin_unlock_irqrestore(&priv->lock, flags);
4155
4156         iwl_synchronize_irq(priv);
4157
4158         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4159
4160         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4161
4162         iwl3945_dealloc_ucode_pci(priv);
4163
4164         if (priv->rxq.bd)
4165                 iwl3945_rx_queue_free(priv, &priv->rxq);
4166         iwl3945_hw_txq_ctx_free(priv);
4167
4168         iwl3945_unset_hw_params(priv);
4169
4170         /*netif_stop_queue(dev); */
4171         flush_workqueue(priv->workqueue);
4172
4173         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4174          * priv->workqueue... so we can't take down the workqueue
4175          * until now... */
4176         destroy_workqueue(priv->workqueue);
4177         priv->workqueue = NULL;
4178         iwl_free_traffic_mem(priv);
4179
4180         free_irq(pdev->irq, priv);
4181         pci_disable_msi(pdev);
4182
4183         pci_iounmap(pdev, priv->hw_base);
4184         pci_release_regions(pdev);
4185         pci_disable_device(pdev);
4186         pci_set_drvdata(pdev, NULL);
4187
4188         iwl_free_channel_map(priv);
4189         iwlcore_free_geos(priv);
4190         kfree(priv->scan_cmd);
4191         if (priv->ibss_beacon)
4192                 dev_kfree_skb(priv->ibss_beacon);
4193
4194         ieee80211_free_hw(priv->hw);
4195 }
4196
4197
4198 /*****************************************************************************
4199  *
4200  * driver and module entry point
4201  *
4202  *****************************************************************************/
4203
4204 static struct pci_driver iwl3945_driver = {
4205         .name = DRV_NAME,
4206         .id_table = iwl3945_hw_card_ids,
4207         .probe = iwl3945_pci_probe,
4208         .remove = __devexit_p(iwl3945_pci_remove),
4209 #ifdef CONFIG_PM
4210         .suspend = iwl_pci_suspend,
4211         .resume = iwl_pci_resume,
4212 #endif
4213 };
4214
4215 static int __init iwl3945_init(void)
4216 {
4217
4218         int ret;
4219         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4220         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4221
4222         ret = iwl3945_rate_control_register();
4223         if (ret) {
4224                 printk(KERN_ERR DRV_NAME
4225                        "Unable to register rate control algorithm: %d\n", ret);
4226                 return ret;
4227         }
4228
4229         ret = pci_register_driver(&iwl3945_driver);
4230         if (ret) {
4231                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4232                 goto error_register;
4233         }
4234
4235         return ret;
4236
4237 error_register:
4238         iwl3945_rate_control_unregister();
4239         return ret;
4240 }
4241
4242 static void __exit iwl3945_exit(void)
4243 {
4244         pci_unregister_driver(&iwl3945_driver);
4245         iwl3945_rate_control_unregister();
4246 }
4247
4248 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4249
4250 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4251 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4252 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4253 MODULE_PARM_DESC(swcrypto,
4254                  "using software crypto (default 1 [software])\n");
4255 #ifdef CONFIG_IWLWIFI_DEBUG
4256 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4257 MODULE_PARM_DESC(debug, "debug output mask");
4258 #endif
4259 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4260                    int, S_IRUGO);
4261 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4262 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4263 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4264
4265 module_exit(iwl3945_exit);
4266 module_init(iwl3945_init);