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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/pci.h>
  36 #include <linux/pci-aspm.h>
  37 #include <linux/slab.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/sched.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/wireless.h>
  44 #include <linux/firmware.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/if_arp.h>
  47
  48 #include <net/ieee80211_radiotap.h>
  49 #include <net/mac80211.h>
  50
  51 #include <asm/div64.h>
  52
  53 #define DRV_NAME        "iwl3945"
  54
  55 #include "iwl-fh.h"
  56 #include "iwl-3945-fh.h"
  57 #include "iwl-commands.h"
  58 #include "iwl-sta.h"
  59 #include "iwl-3945.h"
  60 #include "iwl-core.h"
  61 #include "iwl-helpers.h"
  62 #include "iwl-dev.h"
  63 #include "iwl-spectrum.h"
  64 #include "iwl-legacy.h"
  65
  66 /*
  67  * module name, copyright, version, etc.
  68  */
  69
  70 #define DRV_DESCRIPTION \
  71 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  72
  73 #ifdef CONFIG_IWLWIFI_DEBUG
  74 #define VD "d"
  75 #else
  76 #define VD
  77 #endif
  78
  79 /*
  80  * add "s" to indicate spectrum measurement included.
  81  * we add it here to be consistent with previous releases in which
  82  * this was configurable.
  83  */
  84 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  85 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  86 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  87
  88 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  89 MODULE_VERSION(DRV_VERSION);
  90 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  91 MODULE_LICENSE("GPL");
  92
  93  /* module parameters */
  94 struct iwl_mod_params iwl3945_mod_params = {
  95         .sw_crypto = 1,
  96         .restart_fw = 1,
  97         /* the rest are 0 by default */
  98 };
  99
 100 /**
 101  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 102  * @priv: eeprom and antenna fields are used to determine antenna flags
 103  *
 104  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 105  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 106  *
 107  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 108  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 109  * IWL_ANTENNA_AUX       - Force AUX antenna
 110  */
 111 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 112 {
 113         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 114
 115         switch (iwl3945_mod_params.antenna) {
 116         case IWL_ANTENNA_DIVERSITY:
 117                 return 0;
 118
 119         case IWL_ANTENNA_MAIN:
 120                 if (eeprom->antenna_switch_type)
 121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 123
 124         case IWL_ANTENNA_AUX:
 125                 if (eeprom->antenna_switch_type)
 126                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 127                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 128         }
 129
 130         /* bad antenna selector value */
 131         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 132                 iwl3945_mod_params.antenna);
 133
 134         return 0;               /* "diversity" is default if error */
 135 }
 136
 137 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 138                                    struct ieee80211_key_conf *keyconf,
 139                                    u8 sta_id)
 140 {
 141         unsigned long flags;
 142         __le16 key_flags = 0;
 143         int ret;
 144
 145         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 146         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 147
 148         if (sta_id == priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id)
 149                 key_flags |= STA_KEY_MULTICAST_MSK;
 150
 151         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 152         keyconf->hw_key_idx = keyconf->keyidx;
 153         key_flags &= ~STA_KEY_FLG_INVALID;
 154
 155         spin_lock_irqsave(&priv->sta_lock, flags);
 156         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 157         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 158         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 159                keyconf->keylen);
 160
 161         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 162                keyconf->keylen);
 163
 164         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 165                         == STA_KEY_FLG_NO_ENC)
 166                 priv->stations[sta_id].sta.key.key_offset =
 167                                  iwl_get_free_ucode_key_index(priv);
 168         /* else, we are overriding an existing key => no need to allocated room
 169         * in uCode. */
 170
 171         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 172                 "no space for a new key");
 173
 174         priv->stations[sta_id].sta.key.key_flags = key_flags;
 175         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 176         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 177
 178         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 179
 180         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 181
 182         spin_unlock_irqrestore(&priv->sta_lock, flags);
 183
 184         return ret;
 185 }
 186
 187 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 188                                   struct ieee80211_key_conf *keyconf,
 189                                   u8 sta_id)
 190 {
 191         return -EOPNOTSUPP;
 192 }
 193
 194 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 195                                   struct ieee80211_key_conf *keyconf,
 196                                   u8 sta_id)
 197 {
 198         return -EOPNOTSUPP;
 199 }
 200
 201 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 202 {
 203         unsigned long flags;
 204         struct iwl_addsta_cmd sta_cmd;
 205
 206         spin_lock_irqsave(&priv->sta_lock, flags);
 207         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 208         memset(&priv->stations[sta_id].sta.key, 0,
 209                 sizeof(struct iwl4965_keyinfo));
 210         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 211         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 212         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 213         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 214         spin_unlock_irqrestore(&priv->sta_lock, flags);
 215
 216         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 217         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 218 }
 219
 220 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 221                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 222 {
 223         int ret = 0;
 224
 225         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 226
 227         switch (keyconf->cipher) {
 228         case WLAN_CIPHER_SUITE_CCMP:
 229                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case WLAN_CIPHER_SUITE_TKIP:
 232                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         case WLAN_CIPHER_SUITE_WEP40:
 235         case WLAN_CIPHER_SUITE_WEP104:
 236                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 237                 break;
 238         default:
 239                 IWL_ERR(priv, "Unknown alg: %s alg=%x\n", __func__,
 240                         keyconf->cipher);
 241                 ret = -EINVAL;
 242         }
 243
 244         IWL_DEBUG_WEP(priv, "Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 245                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 246                       sta_id, ret);
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 252 {
 253         int ret = -EOPNOTSUPP;
 254
 255         return ret;
 256 }
 257
 258 static int iwl3945_set_static_key(struct iwl_priv *priv,
 259                                 struct ieee80211_key_conf *key)
 260 {
 261         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 262             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 263                 return -EOPNOTSUPP;
 264
 265         IWL_ERR(priv, "Static key invalid: cipher %x\n", key->cipher);
 266         return -EINVAL;
 267 }
 268
 269 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 270 {
 271         struct list_head *element;
 272
 273         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 274                        priv->frames_count);
 275
 276         while (!list_empty(&priv->free_frames)) {
 277                 element = priv->free_frames.next;
 278                 list_del(element);
 279                 kfree(list_entry(element, struct iwl3945_frame, list));
 280                 priv->frames_count--;
 281         }
 282
 283         if (priv->frames_count) {
 284                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 285                             priv->frames_count);
 286                 priv->frames_count = 0;
 287         }
 288 }
 289
 290 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 291 {
 292         struct iwl3945_frame *frame;
 293         struct list_head *element;
 294         if (list_empty(&priv->free_frames)) {
 295                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 296                 if (!frame) {
 297                         IWL_ERR(priv, "Could not allocate frame!\n");
 298                         return NULL;
 299                 }
 300
 301                 priv->frames_count++;
 302                 return frame;
 303         }
 304
 305         element = priv->free_frames.next;
 306         list_del(element);
 307         return list_entry(element, struct iwl3945_frame, list);
 308 }
 309
 310 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 311 {
 312         memset(frame, 0, sizeof(*frame));
 313         list_add(&frame->list, &priv->free_frames);
 314 }
 315
 316 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 317                                 struct ieee80211_hdr *hdr,
 318                                 int left)
 319 {
 320
 321         if (!iwl_is_associated(priv, IWL_RXON_CTX_BSS) || !priv->beacon_skb)
 322                 return 0;
 323
 324         if (priv->beacon_skb->len > left)
 325                 return 0;
 326
 327         memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len);
 328
 329         return priv->beacon_skb->len;
 330 }
 331
 332 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 333 {
 334         struct iwl3945_frame *frame;
 335         unsigned int frame_size;
 336         int rc;
 337         u8 rate;
 338
 339         frame = iwl3945_get_free_frame(priv);
 340
 341         if (!frame) {
 342                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 343                           "command.\n");
 344                 return -ENOMEM;
 345         }
 346
 347         rate = iwl_rate_get_lowest_plcp(priv,
 348                                 &priv->contexts[IWL_RXON_CTX_BSS]);
 349
 350         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 351
 352         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 353                               &frame->u.cmd[0]);
 354
 355         iwl3945_free_frame(priv, frame);
 356
 357         return rc;
 358 }
 359
 360 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 361 {
 362         if (priv->_3945.shared_virt)
 363                 dma_free_coherent(&priv->pci_dev->dev,
 364                                   sizeof(struct iwl3945_shared),
 365                                   priv->_3945.shared_virt,
 366                                   priv->_3945.shared_phys);
 367 }
 368
 369 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 370                                       struct ieee80211_tx_info *info,
 371                                       struct iwl_device_cmd *cmd,
 372                                       struct sk_buff *skb_frag,
 373                                       int sta_id)
 374 {
 375         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 376         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 377
 378         tx_cmd->sec_ctl = 0;
 379
 380         switch (keyinfo->cipher) {
 381         case WLAN_CIPHER_SUITE_CCMP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 383                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 384                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 385                 break;
 386
 387         case WLAN_CIPHER_SUITE_TKIP:
 388                 break;
 389
 390         case WLAN_CIPHER_SUITE_WEP104:
 391                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 392                 /* fall through */
 393         case WLAN_CIPHER_SUITE_WEP40:
 394                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 395                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 396
 397                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 398
 399                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 400                              "with key %d\n", info->control.hw_key->hw_key_idx);
 401                 break;
 402
 403         default:
 404                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyinfo->cipher);
 405                 break;
 406         }
 407 }
 408
 409 /*
 410  * handle build REPLY_TX command notification.
 411  */
 412 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 413                                   struct iwl_device_cmd *cmd,
 414                                   struct ieee80211_tx_info *info,
 415                                   struct ieee80211_hdr *hdr, u8 std_id)
 416 {
 417         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 418         __le32 tx_flags = tx_cmd->tx_flags;
 419         __le16 fc = hdr->frame_control;
 420
 421         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 422         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 423                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 424                 if (ieee80211_is_mgmt(fc))
 425                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426                 if (ieee80211_is_probe_resp(fc) &&
 427                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 428                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 429         } else {
 430                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 431                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 432         }
 433
 434         tx_cmd->sta_id = std_id;
 435         if (ieee80211_has_morefrags(fc))
 436                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 437
 438         if (ieee80211_is_data_qos(fc)) {
 439                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 440                 tx_cmd->tid_tspec = qc[0] & 0xf;
 441                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 442         } else {
 443                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 444         }
 445
 446         priv->cfg->ops->utils->tx_cmd_protection(priv, info, fc, &tx_flags);
 447
 448         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 449         if (ieee80211_is_mgmt(fc)) {
 450                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 451                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 452                 else
 453                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 454         } else {
 455                 tx_cmd->timeout.pm_frame_timeout = 0;
 456         }
 457
 458         tx_cmd->driver_txop = 0;
 459         tx_cmd->tx_flags = tx_flags;
 460         tx_cmd->next_frame_len = 0;
 461 }
 462
 463 /*
 464  * start REPLY_TX command process
 465  */
 466 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 467 {
 468         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 469         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 470         struct iwl3945_tx_cmd *tx_cmd;
 471         struct iwl_tx_queue *txq = NULL;
 472         struct iwl_queue *q = NULL;
 473         struct iwl_device_cmd *out_cmd;
 474         struct iwl_cmd_meta *out_meta;
 475         dma_addr_t phys_addr;
 476         dma_addr_t txcmd_phys;
 477         int txq_id = skb_get_queue_mapping(skb);
 478         u16 len, idx, hdr_len;
 479         u8 id;
 480         u8 unicast;
 481         u8 sta_id;
 482         u8 tid = 0;
 483         __le16 fc;
 484         u8 wait_write_ptr = 0;
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&priv->lock, flags);
 488         if (iwl_is_rfkill(priv)) {
 489                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 490                 goto drop_unlock;
 491         }
 492
 493         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 494                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 495                 goto drop_unlock;
 496         }
 497
 498         unicast = !is_multicast_ether_addr(hdr->addr1);
 499         id = 0;
 500
 501         fc = hdr->frame_control;
 502
 503 #ifdef CONFIG_IWLWIFI_DEBUG
 504         if (ieee80211_is_auth(fc))
 505                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 506         else if (ieee80211_is_assoc_req(fc))
 507                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 508         else if (ieee80211_is_reassoc_req(fc))
 509                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 510 #endif
 511
 512         spin_unlock_irqrestore(&priv->lock, flags);
 513
 514         hdr_len = ieee80211_hdrlen(fc);
 515
 516         /* Find index into station table for destination station */
 517         sta_id = iwl_sta_id_or_broadcast(
 518                         priv, &priv->contexts[IWL_RXON_CTX_BSS],
 519                         info->control.sta);
 520         if (sta_id == IWL_INVALID_STATION) {
 521                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 522                                hdr->addr1);
 523                 goto drop;
 524         }
 525
 526         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 527
 528         if (ieee80211_is_data_qos(fc)) {
 529                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 530                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 531                 if (unlikely(tid >= MAX_TID_COUNT))
 532                         goto drop;
 533         }
 534
 535         /* Descriptor for chosen Tx queue */
 536         txq = &priv->txq[txq_id];
 537         q = &txq->q;
 538
 539         if ((iwl_queue_space(q) < q->high_mark))
 540                 goto drop;
 541
 542         spin_lock_irqsave(&priv->lock, flags);
 543
 544         idx = get_cmd_index(q, q->write_ptr, 0);
 545
 546         /* Set up driver data for this TFD */
 547         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 548         txq->txb[q->write_ptr].skb = skb;
 549         txq->txb[q->write_ptr].ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 550
 551         /* Init first empty entry in queue's array of Tx/cmd buffers */
 552         out_cmd = txq->cmd[idx];
 553         out_meta = &txq->meta[idx];
 554         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 555         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 556         memset(tx_cmd, 0, sizeof(*tx_cmd));
 557
 558         /*
 559          * Set up the Tx-command (not MAC!) header.
 560          * Store the chosen Tx queue and TFD index within the sequence field;
 561          * after Tx, uCode's Tx response will return this value so driver can
 562          * locate the frame within the tx queue and do post-tx processing.
 563          */
 564         out_cmd->hdr.cmd = REPLY_TX;
 565         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 566                                 INDEX_TO_SEQ(q->write_ptr)));
 567
 568         /* Copy MAC header from skb into command buffer */
 569         memcpy(tx_cmd->hdr, hdr, hdr_len);
 570
 571
 572         if (info->control.hw_key)
 573                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 574
 575         /* TODO need this for burst mode later on */
 576         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 577
 578         /* set is_hcca to 0; it probably will never be implemented */
 579         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 580
 581         /* Total # bytes to be transmitted */
 582         len = (u16)skb->len;
 583         tx_cmd->len = cpu_to_le16(len);
 584
 585         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 586         iwl_update_stats(priv, true, fc, len);
 587         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 589
 590         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 591                 txq->need_update = 1;
 592         } else {
 593                 wait_write_ptr = 1;
 594                 txq->need_update = 0;
 595         }
 596
 597         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 598                      le16_to_cpu(out_cmd->hdr.sequence));
 599         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 600         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 601         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 602                            ieee80211_hdrlen(fc));
 603
 604         /*
 605          * Use the first empty entry in this queue's command buffer array
 606          * to contain the Tx command and MAC header concatenated together
 607          * (payload data will be in another buffer).
 608          * Size of this varies, due to varying MAC header length.
 609          * If end is not dword aligned, we'll have 2 extra bytes at the end
 610          * of the MAC header (device reads on dword boundaries).
 611          * We'll tell device about this padding later.
 612          */
 613         len = sizeof(struct iwl3945_tx_cmd) +
 614                         sizeof(struct iwl_cmd_header) + hdr_len;
 615         len = (len + 3) & ~3;
 616
 617         /* Physical address of this Tx command's header (not MAC header!),
 618          * within command buffer array. */
 619         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 620                                     len, PCI_DMA_TODEVICE);
 621         /* we do not map meta data ... so we can safely access address to
 622          * provide to unmap command*/
 623         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 624         dma_unmap_len_set(out_meta, len, len);
 625
 626         /* Add buffer containing Tx command and MAC(!) header to TFD's
 627          * first entry */
 628         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 629                                                    txcmd_phys, len, 1, 0);
 630
 631
 632         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 633          * if any (802.11 null frames have no payload). */
 634         len = skb->len - hdr_len;
 635         if (len) {
 636                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 637                                            len, PCI_DMA_TODEVICE);
 638                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 639                                                            phys_addr, len,
 640                                                            0, U32_PAD(len));
 641         }
 642
 643
 644         /* Tell device the write index *just past* this latest filled TFD */
 645         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 646         iwl_txq_update_write_ptr(priv, txq);
 647         spin_unlock_irqrestore(&priv->lock, flags);
 648
 649         if ((iwl_queue_space(q) < q->high_mark)
 650             && priv->mac80211_registered) {
 651                 if (wait_write_ptr) {
 652                         spin_lock_irqsave(&priv->lock, flags);
 653                         txq->need_update = 1;
 654                         iwl_txq_update_write_ptr(priv, txq);
 655                         spin_unlock_irqrestore(&priv->lock, flags);
 656                 }
 657
 658                 iwl_stop_queue(priv, txq);
 659         }
 660
 661         return 0;
 662
 663 drop_unlock:
 664         spin_unlock_irqrestore(&priv->lock, flags);
 665 drop:
 666         return -1;
 667 }
 668
 669 static int iwl3945_get_measurement(struct iwl_priv *priv,
 670                                struct ieee80211_measurement_params *params,
 671                                u8 type)
 672 {
 673         struct iwl_spectrum_cmd spectrum;
 674         struct iwl_rx_packet *pkt;
 675         struct iwl_host_cmd cmd = {
 676                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 677                 .data = (void *)&spectrum,
 678                 .flags = CMD_WANT_SKB,
 679         };
 680         u32 add_time = le64_to_cpu(params->start_time);
 681         int rc;
 682         int spectrum_resp_status;
 683         int duration = le16_to_cpu(params->duration);
 684         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 685
 686         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS))
 687                 add_time = iwl_usecs_to_beacons(priv,
 688                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 689                         le16_to_cpu(ctx->timing.beacon_interval));
 690
 691         memset(&spectrum, 0, sizeof(spectrum));
 692
 693         spectrum.channel_count = cpu_to_le16(1);
 694         spectrum.flags =
 695             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 696         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 697         cmd.len = sizeof(spectrum);
 698         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 699
 700         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS))
 701                 spectrum.start_time =
 702                         iwl_add_beacon_time(priv,
 703                                 priv->_3945.last_beacon_time, add_time,
 704                                 le16_to_cpu(ctx->timing.beacon_interval));
 705         else
 706                 spectrum.start_time = 0;
 707
 708         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 709         spectrum.channels[0].channel = params->channel;
 710         spectrum.channels[0].type = type;
 711         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 712                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 713                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 714
 715         rc = iwl_send_cmd_sync(priv, &cmd);
 716         if (rc)
 717                 return rc;
 718
 719         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 720         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 721                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 722                 rc = -EIO;
 723         }
 724
 725         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 726         switch (spectrum_resp_status) {
 727         case 0:         /* Command will be handled */
 728                 if (pkt->u.spectrum.id != 0xff) {
 729                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 730                                                 pkt->u.spectrum.id);
 731                         priv->measurement_status &= ~MEASUREMENT_READY;
 732                 }
 733                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 734                 rc = 0;
 735                 break;
 736
 737         case 1:         /* Command will not be handled */
 738                 rc = -EAGAIN;
 739                 break;
 740         }
 741
 742         iwl_free_pages(priv, cmd.reply_page);
 743
 744         return rc;
 745 }
 746
 747 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 748                                struct iwl_rx_mem_buffer *rxb)
 749 {
 750         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 751         struct iwl_alive_resp *palive;
 752         struct delayed_work *pwork;
 753
 754         palive = &pkt->u.alive_frame;
 755
 756         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 757                        "0x%01X 0x%01X\n",
 758                        palive->is_valid, palive->ver_type,
 759                        palive->ver_subtype);
 760
 761         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 762                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 763                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 764                        sizeof(struct iwl_alive_resp));
 765                 pwork = &priv->init_alive_start;
 766         } else {
 767                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 768                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 769                        sizeof(struct iwl_alive_resp));
 770                 pwork = &priv->alive_start;
 771                 iwl3945_disable_events(priv);
 772         }
 773
 774         /* We delay the ALIVE response by 5ms to
 775          * give the HW RF Kill time to activate... */
 776         if (palive->is_valid == UCODE_VALID_OK)
 777                 queue_delayed_work(priv->workqueue, pwork,
 778                                    msecs_to_jiffies(5));
 779         else
 780                 IWL_WARN(priv, "uCode did not respond OK.\n");
 781 }
 782
 783 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 784                                  struct iwl_rx_mem_buffer *rxb)
 785 {
 786 #ifdef CONFIG_IWLWIFI_DEBUG
 787         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 788 #endif
 789
 790         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 791 }
 792
 793 static void iwl3945_bg_beacon_update(struct work_struct *work)
 794 {
 795         struct iwl_priv *priv =
 796                 container_of(work, struct iwl_priv, beacon_update);
 797         struct sk_buff *beacon;
 798
 799         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 800         beacon = ieee80211_beacon_get(priv->hw,
 801                         priv->contexts[IWL_RXON_CTX_BSS].vif);
 802
 803         if (!beacon) {
 804                 IWL_ERR(priv, "update beacon failed\n");
 805                 return;
 806         }
 807
 808         mutex_lock(&priv->mutex);
 809         /* new beacon skb is allocated every time; dispose previous.*/
 810         if (priv->beacon_skb)
 811                 dev_kfree_skb(priv->beacon_skb);
 812
 813         priv->beacon_skb = beacon;
 814         mutex_unlock(&priv->mutex);
 815
 816         iwl3945_send_beacon_cmd(priv);
 817 }
 818
 819 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 820                                 struct iwl_rx_mem_buffer *rxb)
 821 {
 822         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 823         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 824 #ifdef CONFIG_IWLWIFI_DEBUG
 825         u8 rate = beacon->beacon_notify_hdr.rate;
 826
 827         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 828                 "tsf %d %d rate %d\n",
 829                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 830                 beacon->beacon_notify_hdr.failure_frame,
 831                 le32_to_cpu(beacon->ibss_mgr_status),
 832                 le32_to_cpu(beacon->high_tsf),
 833                 le32_to_cpu(beacon->low_tsf), rate);
 834 #endif
 835
 836         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 837
 838         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 839             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 840                 queue_work(priv->workqueue, &priv->beacon_update);
 841 }
 842
 843 /* Handle notification from uCode that card's power state is changing
 844  * due to software, hardware, or critical temperature RFKILL */
 845 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 846                                     struct iwl_rx_mem_buffer *rxb)
 847 {
 848         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 849         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 850         unsigned long status = priv->status;
 851
 852         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 853                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 854                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 855
 856         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 857                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 858
 859         if (flags & HW_CARD_DISABLED)
 860                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 861         else
 862                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 863
 864
 865         iwl_scan_cancel(priv);
 866
 867         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 868              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 869                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 870                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 871         else
 872                 wake_up_interruptible(&priv->wait_command_queue);
 873 }
 874
 875 /**
 876  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 877  *
 878  * Setup the RX handlers for each of the reply types sent from the uCode
 879  * to the host.
 880  *
 881  * This function chains into the hardware specific files for them to setup
 882  * any hardware specific handlers as well.
 883  */
 884 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 885 {
 886         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 887         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 888         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 889         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 890         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 891                         iwl_rx_spectrum_measure_notif;
 892         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 893         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 894             iwl_rx_pm_debug_statistics_notif;
 895         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 896
 897         /*
 898          * The same handler is used for both the REPLY to a discrete
 899          * statistics request from the host as well as for the periodic
 900          * statistics notifications (after received beacons) from the uCode.
 901          */
 902         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 903         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 904
 905         iwl_setup_rx_scan_handlers(priv);
 906         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 907
 908         /* Set up hardware specific Rx handlers */
 909         iwl3945_hw_rx_handler_setup(priv);
 910 }
 911
 912 /************************** RX-FUNCTIONS ****************************/
 913 /*
 914  * Rx theory of operation
 915  *
 916  * The host allocates 32 DMA target addresses and passes the host address
 917  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 918  * 0 to 31
 919  *
 920  * Rx Queue Indexes
 921  * The host/firmware share two index registers for managing the Rx buffers.
 922  *
 923  * The READ index maps to the first position that the firmware may be writing
 924  * to -- the driver can read up to (but not including) this position and get
 925  * good data.
 926  * The READ index is managed by the firmware once the card is enabled.
 927  *
 928  * The WRITE index maps to the last position the driver has read from -- the
 929  * position preceding WRITE is the last slot the firmware can place a packet.
 930  *
 931  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 932  * WRITE = READ.
 933  *
 934  * During initialization, the host sets up the READ queue position to the first
 935  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 936  *
 937  * When the firmware places a packet in a buffer, it will advance the READ index
 938  * and fire the RX interrupt.  The driver can then query the READ index and
 939  * process as many packets as possible, moving the WRITE index forward as it
 940  * resets the Rx queue buffers with new memory.
 941  *
 942  * The management in the driver is as follows:
 943  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 944  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 945  *   to replenish the iwl->rxq->rx_free.
 946  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 947  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 948  *   'processed' and 'read' driver indexes as well)
 949  * + A received packet is processed and handed to the kernel network stack,
 950  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 951  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 952  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 953  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 954  *   were enough free buffers and RX_STALLED is set it is cleared.
 955  *
 956  *
 957  * Driver sequence:
 958  *
 959  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 960  *                            iwl3945_rx_queue_restock
 961  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 962  *                            queue, updates firmware pointers, and updates
 963  *                            the WRITE index.  If insufficient rx_free buffers
 964  *                            are available, schedules iwl3945_rx_replenish
 965  *
 966  * -- enable interrupts --
 967  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 968  *                            READ INDEX, detaching the SKB from the pool.
 969  *                            Moves the packet buffer from queue to rx_used.
 970  *                            Calls iwl3945_rx_queue_restock to refill any empty
 971  *                            slots.
 972  * ...
 973  *
 974  */
 975
 976 /**
 977  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 978  */
 979 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 980                                           dma_addr_t dma_addr)
 981 {
 982         return cpu_to_le32((u32)dma_addr);
 983 }
 984
 985 /**
 986  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 987  *
 988  * If there are slots in the RX queue that need to be restocked,
 989  * and we have free pre-allocated buffers, fill the ranks as much
 990  * as we can, pulling from rx_free.
 991  *
 992  * This moves the 'write' index forward to catch up with 'processed', and
 993  * also updates the memory address in the firmware to reference the new
 994  * target buffer.
 995  */
 996 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
 997 {
 998         struct iwl_rx_queue *rxq = &priv->rxq;
 999         struct list_head *element;
1000         struct iwl_rx_mem_buffer *rxb;
1001         unsigned long flags;
1002         int write;
1003
1004         spin_lock_irqsave(&rxq->lock, flags);
1005         write = rxq->write & ~0x7;
1006         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1007                 /* Get next free Rx buffer, remove from free list */
1008                 element = rxq->rx_free.next;
1009                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1010                 list_del(element);
1011
1012                 /* Point to Rx buffer via next RBD in circular buffer */
1013                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1014                 rxq->queue[rxq->write] = rxb;
1015                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1016                 rxq->free_count--;
1017         }
1018         spin_unlock_irqrestore(&rxq->lock, flags);
1019         /* If the pre-allocated buffer pool is dropping low, schedule to
1020          * refill it */
1021         if (rxq->free_count <= RX_LOW_WATERMARK)
1022                 queue_work(priv->workqueue, &priv->rx_replenish);
1023
1024
1025         /* If we've added more space for the firmware to place data, tell it.
1026          * Increment device's write pointer in multiples of 8. */
1027         if ((rxq->write_actual != (rxq->write & ~0x7))
1028             || (abs(rxq->write - rxq->read) > 7)) {
1029                 spin_lock_irqsave(&rxq->lock, flags);
1030                 rxq->need_update = 1;
1031                 spin_unlock_irqrestore(&rxq->lock, flags);
1032                 iwl_rx_queue_update_write_ptr(priv, rxq);
1033         }
1034 }
1035
1036 /**
1037  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1038  *
1039  * When moving to rx_free an SKB is allocated for the slot.
1040  *
1041  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1042  * This is called as a scheduled work item (except for during initialization)
1043  */
1044 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1045 {
1046         struct iwl_rx_queue *rxq = &priv->rxq;
1047         struct list_head *element;
1048         struct iwl_rx_mem_buffer *rxb;
1049         struct page *page;
1050         unsigned long flags;
1051         gfp_t gfp_mask = priority;
1052
1053         while (1) {
1054                 spin_lock_irqsave(&rxq->lock, flags);
1055
1056                 if (list_empty(&rxq->rx_used)) {
1057                         spin_unlock_irqrestore(&rxq->lock, flags);
1058                         return;
1059                 }
1060                 spin_unlock_irqrestore(&rxq->lock, flags);
1061
1062                 if (rxq->free_count > RX_LOW_WATERMARK)
1063                         gfp_mask |= __GFP_NOWARN;
1064
1065                 if (priv->hw_params.rx_page_order > 0)
1066                         gfp_mask |= __GFP_COMP;
1067
1068                 /* Alloc a new receive buffer */
1069                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1070                 if (!page) {
1071                         if (net_ratelimit())
1072                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1073                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1074                             net_ratelimit())
1075                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1076                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1077                                          rxq->free_count);
1078                         /* We don't reschedule replenish work here -- we will
1079                          * call the restock method and if it still needs
1080                          * more buffers it will schedule replenish */
1081                         break;
1082                 }
1083
1084                 spin_lock_irqsave(&rxq->lock, flags);
1085                 if (list_empty(&rxq->rx_used)) {
1086                         spin_unlock_irqrestore(&rxq->lock, flags);
1087                         __free_pages(page, priv->hw_params.rx_page_order);
1088                         return;
1089                 }
1090                 element = rxq->rx_used.next;
1091                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1092                 list_del(element);
1093                 spin_unlock_irqrestore(&rxq->lock, flags);
1094
1095                 rxb->page = page;
1096                 /* Get physical address of RB/SKB */
1097                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1098                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1099                                 PCI_DMA_FROMDEVICE);
1100
1101                 spin_lock_irqsave(&rxq->lock, flags);
1102
1103                 list_add_tail(&rxb->list, &rxq->rx_free);
1104                 rxq->free_count++;
1105                 priv->alloc_rxb_page++;
1106
1107                 spin_unlock_irqrestore(&rxq->lock, flags);
1108         }
1109 }
1110
1111 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1112 {
1113         unsigned long flags;
1114         int i;
1115         spin_lock_irqsave(&rxq->lock, flags);
1116         INIT_LIST_HEAD(&rxq->rx_free);
1117         INIT_LIST_HEAD(&rxq->rx_used);
1118         /* Fill the rx_used queue with _all_ of the Rx buffers */
1119         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1120                 /* In the reset function, these buffers may have been allocated
1121                  * to an SKB, so we need to unmap and free potential storage */
1122                 if (rxq->pool[i].page != NULL) {
1123                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1124                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1125                                 PCI_DMA_FROMDEVICE);
1126                         __iwl_free_pages(priv, rxq->pool[i].page);
1127                         rxq->pool[i].page = NULL;
1128                 }
1129                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1130         }
1131
1132         /* Set us so that we have processed and used all buffers, but have
1133          * not restocked the Rx queue with fresh buffers */
1134         rxq->read = rxq->write = 0;
1135         rxq->write_actual = 0;
1136         rxq->free_count = 0;
1137         spin_unlock_irqrestore(&rxq->lock, flags);
1138 }
1139
1140 void iwl3945_rx_replenish(void *data)
1141 {
1142         struct iwl_priv *priv = data;
1143         unsigned long flags;
1144
1145         iwl3945_rx_allocate(priv, GFP_KERNEL);
1146
1147         spin_lock_irqsave(&priv->lock, flags);
1148         iwl3945_rx_queue_restock(priv);
1149         spin_unlock_irqrestore(&priv->lock, flags);
1150 }
1151
1152 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1153 {
1154         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1155
1156         iwl3945_rx_queue_restock(priv);
1157 }
1158
1159
1160 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1161  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1162  * This free routine walks the list of POOL entries and if SKB is set to
1163  * non NULL it is unmapped and freed
1164  */
1165 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1166 {
1167         int i;
1168         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1169                 if (rxq->pool[i].page != NULL) {
1170                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1171                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1172                                 PCI_DMA_FROMDEVICE);
1173                         __iwl_free_pages(priv, rxq->pool[i].page);
1174                         rxq->pool[i].page = NULL;
1175                 }
1176         }
1177
1178         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1179                           rxq->bd_dma);
1180         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1181                           rxq->rb_stts, rxq->rb_stts_dma);
1182         rxq->bd = NULL;
1183         rxq->rb_stts  = NULL;
1184 }
1185
1186
1187 /* Convert linear signal-to-noise ratio into dB */
1188 static u8 ratio2dB[100] = {
1189 /*       0   1   2   3   4   5   6   7   8   9 */
1190          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1191         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1192         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1193         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1194         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1195         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1196         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1197         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1198         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1199         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1200 };
1201
1202 /* Calculates a relative dB value from a ratio of linear
1203  *   (i.e. not dB) signal levels.
1204  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1205 int iwl3945_calc_db_from_ratio(int sig_ratio)
1206 {
1207         /* 1000:1 or higher just report as 60 dB */
1208         if (sig_ratio >= 1000)
1209                 return 60;
1210
1211         /* 100:1 or higher, divide by 10 and use table,
1212          *   add 20 dB to make up for divide by 10 */
1213         if (sig_ratio >= 100)
1214                 return 20 + (int)ratio2dB[sig_ratio/10];
1215
1216         /* We shouldn't see this */
1217         if (sig_ratio < 1)
1218                 return 0;
1219
1220         /* Use table for ratios 1:1 - 99:1 */
1221         return (int)ratio2dB[sig_ratio];
1222 }
1223
1224 /**
1225  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1226  *
1227  * Uses the priv->rx_handlers callback function array to invoke
1228  * the appropriate handlers, including command responses,
1229  * frame-received notifications, and other notifications.
1230  */
1231 static void iwl3945_rx_handle(struct iwl_priv *priv)
1232 {
1233         struct iwl_rx_mem_buffer *rxb;
1234         struct iwl_rx_packet *pkt;
1235         struct iwl_rx_queue *rxq = &priv->rxq;
1236         u32 r, i;
1237         int reclaim;
1238         unsigned long flags;
1239         u8 fill_rx = 0;
1240         u32 count = 8;
1241         int total_empty = 0;
1242
1243         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1244          * buffer that the driver may process (last buffer filled by ucode). */
1245         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1246         i = rxq->read;
1247
1248         /* calculate total frames need to be restock after handling RX */
1249         total_empty = r - rxq->write_actual;
1250         if (total_empty < 0)
1251                 total_empty += RX_QUEUE_SIZE;
1252
1253         if (total_empty > (RX_QUEUE_SIZE / 2))
1254                 fill_rx = 1;
1255         /* Rx interrupt, but nothing sent from uCode */
1256         if (i == r)
1257                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1258
1259         while (i != r) {
1260                 int len;
1261
1262                 rxb = rxq->queue[i];
1263
1264                 /* If an RXB doesn't have a Rx queue slot associated with it,
1265                  * then a bug has been introduced in the queue refilling
1266                  * routines -- catch it here */
1267                 BUG_ON(rxb == NULL);
1268
1269                 rxq->queue[i] = NULL;
1270
1271                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1272                                PAGE_SIZE << priv->hw_params.rx_page_order,
1273                                PCI_DMA_FROMDEVICE);
1274                 pkt = rxb_addr(rxb);
1275
1276                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1277                 len += sizeof(u32); /* account for status word */
1278                 trace_iwlwifi_dev_rx(priv, pkt, len);
1279
1280                 /* Reclaim a command buffer only if this packet is a response
1281                  *   to a (driver-originated) command.
1282                  * If the packet (e.g. Rx frame) originated from uCode,
1283                  *   there is no command buffer to reclaim.
1284                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1285                  *   but apparently a few don't get set; catch them here. */
1286                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1287                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1288                         (pkt->hdr.cmd != REPLY_TX);
1289
1290                 /* Based on type of command response or notification,
1291                  *   handle those that need handling via function in
1292                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1293                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1294                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1295                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1296                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1297                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1298                 } else {
1299                         /* No handling needed */
1300                         IWL_DEBUG_RX(priv,
1301                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1302                                 r, i, get_cmd_string(pkt->hdr.cmd),
1303                                 pkt->hdr.cmd);
1304                 }
1305
1306                 /*
1307                  * XXX: After here, we should always check rxb->page
1308                  * against NULL before touching it or its virtual
1309                  * memory (pkt). Because some rx_handler might have
1310                  * already taken or freed the pages.
1311                  */
1312
1313                 if (reclaim) {
1314                         /* Invoke any callbacks, transfer the buffer to caller,
1315                          * and fire off the (possibly) blocking iwl_send_cmd()
1316                          * as we reclaim the driver command queue */
1317                         if (rxb->page)
1318                                 iwl_tx_cmd_complete(priv, rxb);
1319                         else
1320                                 IWL_WARN(priv, "Claim null rxb?\n");
1321                 }
1322
1323                 /* Reuse the page if possible. For notification packets and
1324                  * SKBs that fail to Rx correctly, add them back into the
1325                  * rx_free list for reuse later. */
1326                 spin_lock_irqsave(&rxq->lock, flags);
1327                 if (rxb->page != NULL) {
1328                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1329                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1330                                 PCI_DMA_FROMDEVICE);
1331                         list_add_tail(&rxb->list, &rxq->rx_free);
1332                         rxq->free_count++;
1333                 } else
1334                         list_add_tail(&rxb->list, &rxq->rx_used);
1335
1336                 spin_unlock_irqrestore(&rxq->lock, flags);
1337
1338                 i = (i + 1) & RX_QUEUE_MASK;
1339                 /* If there are a lot of unused frames,
1340                  * restock the Rx queue so ucode won't assert. */
1341                 if (fill_rx) {
1342                         count++;
1343                         if (count >= 8) {
1344                                 rxq->read = i;
1345                                 iwl3945_rx_replenish_now(priv);
1346                                 count = 0;
1347                         }
1348                 }
1349         }
1350
1351         /* Backtrack one entry */
1352         rxq->read = i;
1353         if (fill_rx)
1354                 iwl3945_rx_replenish_now(priv);
1355         else
1356                 iwl3945_rx_queue_restock(priv);
1357 }
1358
1359 /* call this function to flush any scheduled tasklet */
1360 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1361 {
1362         /* wait to make sure we flush pending tasklet*/
1363         synchronize_irq(priv->pci_dev->irq);
1364         tasklet_kill(&priv->irq_tasklet);
1365 }
1366
1367 static const char *desc_lookup(int i)
1368 {
1369         switch (i) {
1370         case 1:
1371                 return "FAIL";
1372         case 2:
1373                 return "BAD_PARAM";
1374         case 3:
1375                 return "BAD_CHECKSUM";
1376         case 4:
1377                 return "NMI_INTERRUPT";
1378         case 5:
1379                 return "SYSASSERT";
1380         case 6:
1381                 return "FATAL_ERROR";
1382         }
1383
1384         return "UNKNOWN";
1385 }
1386
1387 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1388 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1389
1390 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1391 {
1392         u32 i;
1393         u32 desc, time, count, base, data1;
1394         u32 blink1, blink2, ilink1, ilink2;
1395
1396         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1397
1398         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1399                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1400                 return;
1401         }
1402
1403
1404         count = iwl_read_targ_mem(priv, base);
1405
1406         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1407                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1408                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1409                         priv->status, count);
1410         }
1411
1412         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1413                   "ilink1  nmiPC   Line\n");
1414         for (i = ERROR_START_OFFSET;
1415              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1416              i += ERROR_ELEM_SIZE) {
1417                 desc = iwl_read_targ_mem(priv, base + i);
1418                 time =
1419                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1420                 blink1 =
1421                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1422                 blink2 =
1423                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1424                 ilink1 =
1425                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1426                 ilink2 =
1427                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1428                 data1 =
1429                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1430
1431                 IWL_ERR(priv,
1432                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1433                         desc_lookup(desc), desc, time, blink1, blink2,
1434                         ilink1, ilink2, data1);
1435                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1436                                         0, blink1, blink2, ilink1, ilink2);
1437         }
1438 }
1439
1440 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1441
1442 /**
1443  * iwl3945_print_event_log - Dump error event log to syslog
1444  *
1445  */
1446 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1447                                   u32 num_events, u32 mode,
1448                                   int pos, char **buf, size_t bufsz)
1449 {
1450         u32 i;
1451         u32 base;       /* SRAM byte address of event log header */
1452         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1453         u32 ptr;        /* SRAM byte address of log data */
1454         u32 ev, time, data; /* event log data */
1455         unsigned long reg_flags;
1456
1457         if (num_events == 0)
1458                 return pos;
1459
1460         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1461
1462         if (mode == 0)
1463                 event_size = 2 * sizeof(u32);
1464         else
1465                 event_size = 3 * sizeof(u32);
1466
1467         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1468
1469         /* Make sure device is powered up for SRAM reads */
1470         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1471         iwl_grab_nic_access(priv);
1472
1473         /* Set starting address; reads will auto-increment */
1474         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1475         rmb();
1476
1477         /* "time" is actually "data" for mode 0 (no timestamp).
1478          * place event id # at far right for easier visual parsing. */
1479         for (i = 0; i < num_events; i++) {
1480                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1481                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1482                 if (mode == 0) {
1483                         /* data, ev */
1484                         if (bufsz) {
1485                                 pos += scnprintf(*buf + pos, bufsz - pos,
1486                                                 "0x%08x:%04u\n",
1487                                                 time, ev);
1488                         } else {
1489                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1490                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1491                                                               time, ev);
1492                         }
1493                 } else {
1494                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1495                         if (bufsz) {
1496                                 pos += scnprintf(*buf + pos, bufsz - pos,
1497                                                 "%010u:0x%08x:%04u\n",
1498                                                  time, data, ev);
1499                         } else {
1500                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1501                                         time, data, ev);
1502                                 trace_iwlwifi_dev_ucode_event(priv, time,
1503                                                               data, ev);
1504                         }
1505                 }
1506         }
1507
1508         /* Allow device to power down */
1509         iwl_release_nic_access(priv);
1510         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1511         return pos;
1512 }
1513
1514 /**
1515  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1516  */
1517 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1518                                       u32 num_wraps, u32 next_entry,
1519                                       u32 size, u32 mode,
1520                                       int pos, char **buf, size_t bufsz)
1521 {
1522         /*
1523          * display the newest DEFAULT_LOG_ENTRIES entries
1524          * i.e the entries just before the next ont that uCode would fill.
1525          */
1526         if (num_wraps) {
1527                 if (next_entry < size) {
1528                         pos = iwl3945_print_event_log(priv,
1529                                              capacity - (size - next_entry),
1530                                              size - next_entry, mode,
1531                                              pos, buf, bufsz);
1532                         pos = iwl3945_print_event_log(priv, 0,
1533                                                       next_entry, mode,
1534                                                       pos, buf, bufsz);
1535                 } else
1536                         pos = iwl3945_print_event_log(priv, next_entry - size,
1537                                                       size, mode,
1538                                                       pos, buf, bufsz);
1539         } else {
1540                 if (next_entry < size)
1541                         pos = iwl3945_print_event_log(priv, 0,
1542                                                       next_entry, mode,
1543                                                       pos, buf, bufsz);
1544                 else
1545                         pos = iwl3945_print_event_log(priv, next_entry - size,
1546                                                       size, mode,
1547                                                       pos, buf, bufsz);
1548         }
1549         return pos;
1550 }
1551
1552 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1553
1554 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1555                             char **buf, bool display)
1556 {
1557         u32 base;       /* SRAM byte address of event log header */
1558         u32 capacity;   /* event log capacity in # entries */
1559         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1560         u32 num_wraps;  /* # times uCode wrapped to top of log */
1561         u32 next_entry; /* index of next entry to be written by uCode */
1562         u32 size;       /* # entries that we'll print */
1563         int pos = 0;
1564         size_t bufsz = 0;
1565
1566         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1567         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1568                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1569                 return  -EINVAL;
1570         }
1571
1572         /* event log header */
1573         capacity = iwl_read_targ_mem(priv, base);
1574         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1575         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1576         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1577
1578         if (capacity > priv->cfg->base_params->max_event_log_size) {
1579                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1580                         capacity, priv->cfg->base_params->max_event_log_size);
1581                 capacity = priv->cfg->base_params->max_event_log_size;
1582         }
1583
1584         if (next_entry > priv->cfg->base_params->max_event_log_size) {
1585                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1586                         next_entry, priv->cfg->base_params->max_event_log_size);
1587                 next_entry = priv->cfg->base_params->max_event_log_size;
1588         }
1589
1590         size = num_wraps ? capacity : next_entry;
1591
1592         /* bail out if nothing in log */
1593         if (size == 0) {
1594                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1595                 return pos;
1596         }
1597
1598 #ifdef CONFIG_IWLWIFI_DEBUG
1599         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1600                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1601                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1602 #else
1603         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1604                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1605 #endif
1606
1607         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1608                   size);
1609
1610 #ifdef CONFIG_IWLWIFI_DEBUG
1611         if (display) {
1612                 if (full_log)
1613                         bufsz = capacity * 48;
1614                 else
1615                         bufsz = size * 48;
1616                 *buf = kmalloc(bufsz, GFP_KERNEL);
1617                 if (!*buf)
1618                         return -ENOMEM;
1619         }
1620         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1621                 /* if uCode has wrapped back to top of log,
1622                  * start at the oldest entry,
1623                  * i.e the next one that uCode would fill.
1624                  */
1625                 if (num_wraps)
1626                         pos = iwl3945_print_event_log(priv, next_entry,
1627                                                 capacity - next_entry, mode,
1628                                                 pos, buf, bufsz);
1629
1630                 /* (then/else) start at top of log */
1631                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1632                                               pos, buf, bufsz);
1633         } else
1634                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1635                                                     next_entry, size, mode,
1636                                                     pos, buf, bufsz);
1637 #else
1638         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1639                                             next_entry, size, mode,
1640                                             pos, buf, bufsz);
1641 #endif
1642         return pos;
1643 }
1644
1645 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1646 {
1647         u32 inta, handled = 0;
1648         u32 inta_fh;
1649         unsigned long flags;
1650 #ifdef CONFIG_IWLWIFI_DEBUG
1651         u32 inta_mask;
1652 #endif
1653
1654         spin_lock_irqsave(&priv->lock, flags);
1655
1656         /* Ack/clear/reset pending uCode interrupts.
1657          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1658          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1659         inta = iwl_read32(priv, CSR_INT);
1660         iwl_write32(priv, CSR_INT, inta);
1661
1662         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1663          * Any new interrupts that happen after this, either while we're
1664          * in this tasklet, or later, will show up in next ISR/tasklet. */
1665         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1666         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1667
1668 #ifdef CONFIG_IWLWIFI_DEBUG
1669         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1670                 /* just for debug */
1671                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1672                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1673                               inta, inta_mask, inta_fh);
1674         }
1675 #endif
1676
1677         spin_unlock_irqrestore(&priv->lock, flags);
1678
1679         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1680          * atomic, make sure that inta covers all the interrupts that
1681          * we've discovered, even if FH interrupt came in just after
1682          * reading CSR_INT. */
1683         if (inta_fh & CSR39_FH_INT_RX_MASK)
1684                 inta |= CSR_INT_BIT_FH_RX;
1685         if (inta_fh & CSR39_FH_INT_TX_MASK)
1686                 inta |= CSR_INT_BIT_FH_TX;
1687
1688         /* Now service all interrupt bits discovered above. */
1689         if (inta & CSR_INT_BIT_HW_ERR) {
1690                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1691
1692                 /* Tell the device to stop sending interrupts */
1693                 iwl_disable_interrupts(priv);
1694
1695                 priv->isr_stats.hw++;
1696                 iwl_irq_handle_error(priv);
1697
1698                 handled |= CSR_INT_BIT_HW_ERR;
1699
1700                 return;
1701         }
1702
1703 #ifdef CONFIG_IWLWIFI_DEBUG
1704         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1705                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1706                 if (inta & CSR_INT_BIT_SCD) {
1707                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1708                                       "the frame/frames.\n");
1709                         priv->isr_stats.sch++;
1710                 }
1711
1712                 /* Alive notification via Rx interrupt will do the real work */
1713                 if (inta & CSR_INT_BIT_ALIVE) {
1714                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1715                         priv->isr_stats.alive++;
1716                 }
1717         }
1718 #endif
1719         /* Safely ignore these bits for debug checks below */
1720         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1721
1722         /* Error detected by uCode */
1723         if (inta & CSR_INT_BIT_SW_ERR) {
1724                 IWL_ERR(priv, "Microcode SW error detected. "
1725                         "Restarting 0x%X.\n", inta);
1726                 priv->isr_stats.sw++;
1727                 iwl_irq_handle_error(priv);
1728                 handled |= CSR_INT_BIT_SW_ERR;
1729         }
1730
1731         /* uCode wakes up after power-down sleep */
1732         if (inta & CSR_INT_BIT_WAKEUP) {
1733                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1734                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1735                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1736                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1737                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1738                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1739                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1740                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1741
1742                 priv->isr_stats.wakeup++;
1743                 handled |= CSR_INT_BIT_WAKEUP;
1744         }
1745
1746         /* All uCode command responses, including Tx command responses,
1747          * Rx "responses" (frame-received notification), and other
1748          * notifications from uCode come through here*/
1749         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1750                 iwl3945_rx_handle(priv);
1751                 priv->isr_stats.rx++;
1752                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1753         }
1754
1755         if (inta & CSR_INT_BIT_FH_TX) {
1756                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1757                 priv->isr_stats.tx++;
1758
1759                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1760                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1761                                         (FH39_SRVC_CHNL), 0x0);
1762                 handled |= CSR_INT_BIT_FH_TX;
1763         }
1764
1765         if (inta & ~handled) {
1766                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1767                 priv->isr_stats.unhandled++;
1768         }
1769
1770         if (inta & ~priv->inta_mask) {
1771                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1772                          inta & ~priv->inta_mask);
1773                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1774         }
1775
1776         /* Re-enable all interrupts */
1777         /* only Re-enable if disabled by irq */
1778         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1779                 iwl_enable_interrupts(priv);
1780
1781 #ifdef CONFIG_IWLWIFI_DEBUG
1782         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1783                 inta = iwl_read32(priv, CSR_INT);
1784                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1785                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1786                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1787                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1788         }
1789 #endif
1790 }
1791
1792 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1793                                                struct ieee80211_vif *vif,
1794                                                enum ieee80211_band band,
1795                                                struct iwl3945_scan_channel *scan_ch)
1796 {
1797         const struct ieee80211_supported_band *sband;
1798         u16 passive_dwell = 0;
1799         u16 active_dwell = 0;
1800         int added = 0;
1801         u8 channel = 0;
1802
1803         sband = iwl_get_hw_mode(priv, band);
1804         if (!sband) {
1805                 IWL_ERR(priv, "invalid band\n");
1806                 return added;
1807         }
1808
1809         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1810         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1811
1812         if (passive_dwell <= active_dwell)
1813                 passive_dwell = active_dwell + 1;
1814
1815
1816         channel = iwl_get_single_channel_number(priv, band);
1817
1818         if (channel) {
1819                 scan_ch->channel = channel;
1820                 scan_ch->type = 0;      /* passive */
1821                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1822                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1823                 /* Set txpower levels to defaults */
1824                 scan_ch->tpc.dsp_atten = 110;
1825                 if (band == IEEE80211_BAND_5GHZ)
1826                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1827                 else
1828                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1829                 added++;
1830         } else
1831                 IWL_ERR(priv, "no valid channel found\n");
1832         return added;
1833 }
1834
1835 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1836                                          enum ieee80211_band band,
1837                                      u8 is_active, u8 n_probes,
1838                                      struct iwl3945_scan_channel *scan_ch,
1839                                      struct ieee80211_vif *vif)
1840 {
1841         struct ieee80211_channel *chan;
1842         const struct ieee80211_supported_band *sband;
1843         const struct iwl_channel_info *ch_info;
1844         u16 passive_dwell = 0;
1845         u16 active_dwell = 0;
1846         int added, i;
1847
1848         sband = iwl_get_hw_mode(priv, band);
1849         if (!sband)
1850                 return 0;
1851
1852         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1853         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1854
1855         if (passive_dwell <= active_dwell)
1856                 passive_dwell = active_dwell + 1;
1857
1858         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1859                 chan = priv->scan_request->channels[i];
1860
1861                 if (chan->band != band)
1862                         continue;
1863
1864                 scan_ch->channel = chan->hw_value;
1865
1866                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1867                 if (!is_channel_valid(ch_info)) {
1868                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1869                                        scan_ch->channel);
1870                         continue;
1871                 }
1872
1873                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1874                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1875                 /* If passive , set up for auto-switch
1876                  *  and use long active_dwell time.
1877                  */
1878                 if (!is_active || is_channel_passive(ch_info) ||
1879                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1880                         scan_ch->type = 0;      /* passive */
1881                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1882                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1883                 } else {
1884                         scan_ch->type = 1;      /* active */
1885                 }
1886
1887                 /* Set direct probe bits. These may be used both for active
1888                  * scan channels (probes gets sent right away),
1889                  * or for passive channels (probes get se sent only after
1890                  * hearing clear Rx packet).*/
1891                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1892                         if (n_probes)
1893                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1894                 } else {
1895                         /* uCode v1 does not allow setting direct probe bits on
1896                          * passive channel. */
1897                         if ((scan_ch->type & 1) && n_probes)
1898                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1899                 }
1900
1901                 /* Set txpower levels to defaults */
1902                 scan_ch->tpc.dsp_atten = 110;
1903                 /* scan_pwr_info->tpc.dsp_atten; */
1904
1905                 /*scan_pwr_info->tpc.tx_gain; */
1906                 if (band == IEEE80211_BAND_5GHZ)
1907                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1908                 else {
1909                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1910                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1911                          * power level:
1912                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1913                          */
1914                 }
1915
1916                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1917                                scan_ch->channel,
1918                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1919                                (scan_ch->type & 1) ?
1920                                active_dwell : passive_dwell);
1921
1922                 scan_ch++;
1923                 added++;
1924         }
1925
1926         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1927         return added;
1928 }
1929
1930 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1931                               struct ieee80211_rate *rates)
1932 {
1933         int i;
1934
1935         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1936                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1937                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1938                 rates[i].hw_value_short = i;
1939                 rates[i].flags = 0;
1940                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1941                         /*
1942                          * If CCK != 1M then set short preamble rate flag.
1943                          */
1944                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1945                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1946                 }
1947         }
1948 }
1949
1950 /******************************************************************************
1951  *
1952  * uCode download functions
1953  *
1954  ******************************************************************************/
1955
1956 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1957 {
1958         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1959         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1960         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1961         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1962         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1963         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1964 }
1965
1966 /**
1967  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1968  *     looking at all data.
1969  */
1970 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1971 {
1972         u32 val;
1973         u32 save_len = len;
1974         int rc = 0;
1975         u32 errcnt;
1976
1977         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1978
1979         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1980                                IWL39_RTC_INST_LOWER_BOUND);
1981
1982         errcnt = 0;
1983         for (; len > 0; len -= sizeof(u32), image++) {
1984                 /* read data comes through single port, auto-incr addr */
1985                 /* NOTE: Use the debugless read so we don't flood kernel log
1986                  * if IWL_DL_IO is set */
1987                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1988                 if (val != le32_to_cpu(*image)) {
1989                         IWL_ERR(priv, "uCode INST section is invalid at "
1990                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1991                                   save_len - len, val, le32_to_cpu(*image));
1992                         rc = -EIO;
1993                         errcnt++;
1994                         if (errcnt >= 20)
1995                                 break;
1996                 }
1997         }
1998
1999
2000         if (!errcnt)
2001                 IWL_DEBUG_INFO(priv,
2002                         "ucode image in INSTRUCTION memory is good\n");
2003
2004         return rc;
2005 }
2006
2007
2008 /**
2009  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2010  *   using sample data 100 bytes apart.  If these sample points are good,
2011  *   it's a pretty good bet that everything between them is good, too.
2012  */
2013 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2014 {
2015         u32 val;
2016         int rc = 0;
2017         u32 errcnt = 0;
2018         u32 i;
2019
2020         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2021
2022         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2023                 /* read data comes through single port, auto-incr addr */
2024                 /* NOTE: Use the debugless read so we don't flood kernel log
2025                  * if IWL_DL_IO is set */
2026                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2027                         i + IWL39_RTC_INST_LOWER_BOUND);
2028                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2029                 if (val != le32_to_cpu(*image)) {
2030 #if 0 /* Enable this if you want to see details */
2031                         IWL_ERR(priv, "uCode INST section is invalid at "
2032                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2033                                   i, val, *image);
2034 #endif
2035                         rc = -EIO;
2036                         errcnt++;
2037                         if (errcnt >= 3)
2038                                 break;
2039                 }
2040         }
2041
2042         return rc;
2043 }
2044
2045
2046 /**
2047  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2048  *    and verify its contents
2049  */
2050 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2051 {
2052         __le32 *image;
2053         u32 len;
2054         int rc = 0;
2055
2056         /* Try bootstrap */
2057         image = (__le32 *)priv->ucode_boot.v_addr;
2058         len = priv->ucode_boot.len;
2059         rc = iwl3945_verify_inst_sparse(priv, image, len);
2060         if (rc == 0) {
2061                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2062                 return 0;
2063         }
2064
2065         /* Try initialize */
2066         image = (__le32 *)priv->ucode_init.v_addr;
2067         len = priv->ucode_init.len;
2068         rc = iwl3945_verify_inst_sparse(priv, image, len);
2069         if (rc == 0) {
2070                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2071                 return 0;
2072         }
2073
2074         /* Try runtime/protocol */
2075         image = (__le32 *)priv->ucode_code.v_addr;
2076         len = priv->ucode_code.len;
2077         rc = iwl3945_verify_inst_sparse(priv, image, len);
2078         if (rc == 0) {
2079                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2080                 return 0;
2081         }
2082
2083         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2084
2085         /* Since nothing seems to match, show first several data entries in
2086          * instruction SRAM, so maybe visual inspection will give a clue.
2087          * Selection of bootstrap image (vs. other images) is arbitrary. */
2088         image = (__le32 *)priv->ucode_boot.v_addr;
2089         len = priv->ucode_boot.len;
2090         rc = iwl3945_verify_inst_full(priv, image, len);
2091
2092         return rc;
2093 }
2094
2095 static void iwl3945_nic_start(struct iwl_priv *priv)
2096 {
2097         /* Remove all resets to allow NIC to operate */
2098         iwl_write32(priv, CSR_RESET, 0);
2099 }
2100
2101 #define IWL3945_UCODE_GET(item)                                         \
2102 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2103 {                                                                       \
2104         return le32_to_cpu(ucode->u.v1.item);                           \
2105 }
2106
2107 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2108 {
2109         return 24;
2110 }
2111
2112 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2113 {
2114         return (u8 *) ucode->u.v1.data;
2115 }
2116
2117 IWL3945_UCODE_GET(inst_size);
2118 IWL3945_UCODE_GET(data_size);
2119 IWL3945_UCODE_GET(init_size);
2120 IWL3945_UCODE_GET(init_data_size);
2121 IWL3945_UCODE_GET(boot_size);
2122
2123 /**
2124  * iwl3945_read_ucode - Read uCode images from disk file.
2125  *
2126  * Copy into buffers for card to fetch via bus-mastering
2127  */
2128 static int iwl3945_read_ucode(struct iwl_priv *priv)
2129 {
2130         const struct iwl_ucode_header *ucode;
2131         int ret = -EINVAL, index;
2132         const struct firmware *ucode_raw;
2133         /* firmware file name contains uCode/driver compatibility version */
2134         const char *name_pre = priv->cfg->fw_name_pre;
2135         const unsigned int api_max = priv->cfg->ucode_api_max;
2136         const unsigned int api_min = priv->cfg->ucode_api_min;
2137         char buf[25];
2138         u8 *src;
2139         size_t len;
2140         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2141
2142         /* Ask kernel firmware_class module to get the boot firmware off disk.
2143          * request_firmware() is synchronous, file is in memory on return. */
2144         for (index = api_max; index >= api_min; index--) {
2145                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2146                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2147                 if (ret < 0) {
2148                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2149                                   buf, ret);
2150                         if (ret == -ENOENT)
2151                                 continue;
2152                         else
2153                                 goto error;
2154                 } else {
2155                         if (index < api_max)
2156                                 IWL_ERR(priv, "Loaded firmware %s, "
2157                                         "which is deprecated. "
2158                                         " Please use API v%u instead.\n",
2159                                           buf, api_max);
2160                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2161                                        "(%zd bytes) from disk\n",
2162                                        buf, ucode_raw->size);
2163                         break;
2164                 }
2165         }
2166
2167         if (ret < 0)
2168                 goto error;
2169
2170         /* Make sure that we got at least our header! */
2171         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2172                 IWL_ERR(priv, "File size way too small!\n");
2173                 ret = -EINVAL;
2174                 goto err_release;
2175         }
2176
2177         /* Data from ucode file:  header followed by uCode images */
2178         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2179
2180         priv->ucode_ver = le32_to_cpu(ucode->ver);
2181         api_ver = IWL_UCODE_API(priv->ucode_ver);
2182         inst_size = iwl3945_ucode_get_inst_size(ucode);
2183         data_size = iwl3945_ucode_get_data_size(ucode);
2184         init_size = iwl3945_ucode_get_init_size(ucode);
2185         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2186         boot_size = iwl3945_ucode_get_boot_size(ucode);
2187         src = iwl3945_ucode_get_data(ucode);
2188
2189         /* api_ver should match the api version forming part of the
2190          * firmware filename ... but we don't check for that and only rely
2191          * on the API version read from firmware header from here on forward */
2192
2193         if (api_ver < api_min || api_ver > api_max) {
2194                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2195                           "Driver supports v%u, firmware is v%u.\n",
2196                           api_max, api_ver);
2197                 priv->ucode_ver = 0;
2198                 ret = -EINVAL;
2199                 goto err_release;
2200         }
2201         if (api_ver != api_max)
2202                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2203                           "got %u. New firmware can be obtained "
2204                           "from http://www.intellinuxwireless.org.\n",
2205                           api_max, api_ver);
2206
2207         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2208                 IWL_UCODE_MAJOR(priv->ucode_ver),
2209                 IWL_UCODE_MINOR(priv->ucode_ver),
2210                 IWL_UCODE_API(priv->ucode_ver),
2211                 IWL_UCODE_SERIAL(priv->ucode_ver));
2212
2213         snprintf(priv->hw->wiphy->fw_version,
2214                  sizeof(priv->hw->wiphy->fw_version),
2215                  "%u.%u.%u.%u",
2216                  IWL_UCODE_MAJOR(priv->ucode_ver),
2217                  IWL_UCODE_MINOR(priv->ucode_ver),
2218                  IWL_UCODE_API(priv->ucode_ver),
2219                  IWL_UCODE_SERIAL(priv->ucode_ver));
2220
2221         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2222                        priv->ucode_ver);
2223         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2224                        inst_size);
2225         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2226                        data_size);
2227         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2228                        init_size);
2229         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2230                        init_data_size);
2231         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2232                        boot_size);
2233
2234
2235         /* Verify size of file vs. image size info in file's header */
2236         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2237                 inst_size + data_size + init_size +
2238                 init_data_size + boot_size) {
2239
2240                 IWL_DEBUG_INFO(priv,
2241                         "uCode file size %zd does not match expected size\n",
2242                         ucode_raw->size);
2243                 ret = -EINVAL;
2244                 goto err_release;
2245         }
2246
2247         /* Verify that uCode images will fit in card's SRAM */
2248         if (inst_size > IWL39_MAX_INST_SIZE) {
2249                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2250                                inst_size);
2251                 ret = -EINVAL;
2252                 goto err_release;
2253         }
2254
2255         if (data_size > IWL39_MAX_DATA_SIZE) {
2256                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2257                                data_size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261         if (init_size > IWL39_MAX_INST_SIZE) {
2262                 IWL_DEBUG_INFO(priv,
2263                                 "uCode init instr len %d too large to fit in\n",
2264                                 init_size);
2265                 ret = -EINVAL;
2266                 goto err_release;
2267         }
2268         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2269                 IWL_DEBUG_INFO(priv,
2270                                 "uCode init data len %d too large to fit in\n",
2271                                 init_data_size);
2272                 ret = -EINVAL;
2273                 goto err_release;
2274         }
2275         if (boot_size > IWL39_MAX_BSM_SIZE) {
2276                 IWL_DEBUG_INFO(priv,
2277                                 "uCode boot instr len %d too large to fit in\n",
2278                                 boot_size);
2279                 ret = -EINVAL;
2280                 goto err_release;
2281         }
2282
2283         /* Allocate ucode buffers for card's bus-master loading ... */
2284
2285         /* Runtime instructions and 2 copies of data:
2286          * 1) unmodified from disk
2287          * 2) backup cache for save/restore during power-downs */
2288         priv->ucode_code.len = inst_size;
2289         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2290
2291         priv->ucode_data.len = data_size;
2292         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2293
2294         priv->ucode_data_backup.len = data_size;
2295         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2296
2297         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2298             !priv->ucode_data_backup.v_addr)
2299                 goto err_pci_alloc;
2300
2301         /* Initialization instructions and data */
2302         if (init_size && init_data_size) {
2303                 priv->ucode_init.len = init_size;
2304                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2305
2306                 priv->ucode_init_data.len = init_data_size;
2307                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2308
2309                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2310                         goto err_pci_alloc;
2311         }
2312
2313         /* Bootstrap (instructions only, no data) */
2314         if (boot_size) {
2315                 priv->ucode_boot.len = boot_size;
2316                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2317
2318                 if (!priv->ucode_boot.v_addr)
2319                         goto err_pci_alloc;
2320         }
2321
2322         /* Copy images into buffers for card's bus-master reads ... */
2323
2324         /* Runtime instructions (first block of data in file) */
2325         len = inst_size;
2326         IWL_DEBUG_INFO(priv,
2327                 "Copying (but not loading) uCode instr len %zd\n", len);
2328         memcpy(priv->ucode_code.v_addr, src, len);
2329         src += len;
2330
2331         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2332                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2333
2334         /* Runtime data (2nd block)
2335          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2336         len = data_size;
2337         IWL_DEBUG_INFO(priv,
2338                 "Copying (but not loading) uCode data len %zd\n", len);
2339         memcpy(priv->ucode_data.v_addr, src, len);
2340         memcpy(priv->ucode_data_backup.v_addr, src, len);
2341         src += len;
2342
2343         /* Initialization instructions (3rd block) */
2344         if (init_size) {
2345                 len = init_size;
2346                 IWL_DEBUG_INFO(priv,
2347                         "Copying (but not loading) init instr len %zd\n", len);
2348                 memcpy(priv->ucode_init.v_addr, src, len);
2349                 src += len;
2350         }
2351
2352         /* Initialization data (4th block) */
2353         if (init_data_size) {
2354                 len = init_data_size;
2355                 IWL_DEBUG_INFO(priv,
2356                         "Copying (but not loading) init data len %zd\n", len);
2357                 memcpy(priv->ucode_init_data.v_addr, src, len);
2358                 src += len;
2359         }
2360
2361         /* Bootstrap instructions (5th block) */
2362         len = boot_size;
2363         IWL_DEBUG_INFO(priv,
2364                 "Copying (but not loading) boot instr len %zd\n", len);
2365         memcpy(priv->ucode_boot.v_addr, src, len);
2366
2367         /* We have our copies now, allow OS release its copies */
2368         release_firmware(ucode_raw);
2369         return 0;
2370
2371  err_pci_alloc:
2372         IWL_ERR(priv, "failed to allocate pci memory\n");
2373         ret = -ENOMEM;
2374         iwl3945_dealloc_ucode_pci(priv);
2375
2376  err_release:
2377         release_firmware(ucode_raw);
2378
2379  error:
2380         return ret;
2381 }
2382
2383
2384 /**
2385  * iwl3945_set_ucode_ptrs - Set uCode address location
2386  *
2387  * Tell initialization uCode where to find runtime uCode.
2388  *
2389  * BSM registers initially contain pointers to initialization uCode.
2390  * We need to replace them to load runtime uCode inst and data,
2391  * and to save runtime data when powering down.
2392  */
2393 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2394 {
2395         dma_addr_t pinst;
2396         dma_addr_t pdata;
2397
2398         /* bits 31:0 for 3945 */
2399         pinst = priv->ucode_code.p_addr;
2400         pdata = priv->ucode_data_backup.p_addr;
2401
2402         /* Tell bootstrap uCode where to find image to load */
2403         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2404         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2405         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2406                                  priv->ucode_data.len);
2407
2408         /* Inst byte count must be last to set up, bit 31 signals uCode
2409          *   that all new ptr/size info is in place */
2410         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2411                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2412
2413         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2414
2415         return 0;
2416 }
2417
2418 /**
2419  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2420  *
2421  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2422  *
2423  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2424  */
2425 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2426 {
2427         /* Check alive response for "valid" sign from uCode */
2428         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2429                 /* We had an error bringing up the hardware, so take it
2430                  * all the way back down so we can try again */
2431                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2432                 goto restart;
2433         }
2434
2435         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2436          * This is a paranoid check, because we would not have gotten the
2437          * "initialize" alive if code weren't properly loaded.  */
2438         if (iwl3945_verify_ucode(priv)) {
2439                 /* Runtime instruction load was bad;
2440                  * take it all the way back down so we can try again */
2441                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2442                 goto restart;
2443         }
2444
2445         /* Send pointers to protocol/runtime uCode image ... init code will
2446          * load and launch runtime uCode, which will send us another "Alive"
2447          * notification. */
2448         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2449         if (iwl3945_set_ucode_ptrs(priv)) {
2450                 /* Runtime instruction load won't happen;
2451                  * take it all the way back down so we can try again */
2452                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2453                 goto restart;
2454         }
2455         return;
2456
2457  restart:
2458         queue_work(priv->workqueue, &priv->restart);
2459 }
2460
2461 /**
2462  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2463  *                   from protocol/runtime uCode (initialization uCode's
2464  *                   Alive gets handled by iwl3945_init_alive_start()).
2465  */
2466 static void iwl3945_alive_start(struct iwl_priv *priv)
2467 {
2468         int thermal_spin = 0;
2469         u32 rfkill;
2470         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2471
2472         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2473
2474         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2475                 /* We had an error bringing up the hardware, so take it
2476                  * all the way back down so we can try again */
2477                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2478                 goto restart;
2479         }
2480
2481         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2482          * This is a paranoid check, because we would not have gotten the
2483          * "runtime" alive if code weren't properly loaded.  */
2484         if (iwl3945_verify_ucode(priv)) {
2485                 /* Runtime instruction load was bad;
2486                  * take it all the way back down so we can try again */
2487                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2488                 goto restart;
2489         }
2490
2491         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2492         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2493
2494         if (rfkill & 0x1) {
2495                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2496                 /* if RFKILL is not on, then wait for thermal
2497                  * sensor in adapter to kick in */
2498                 while (iwl3945_hw_get_temperature(priv) == 0) {
2499                         thermal_spin++;
2500                         udelay(10);
2501                 }
2502
2503                 if (thermal_spin)
2504                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2505                                        thermal_spin * 10);
2506         } else
2507                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2508
2509         /* After the ALIVE response, we can send commands to 3945 uCode */
2510         set_bit(STATUS_ALIVE, &priv->status);
2511
2512         /* Enable watchdog to monitor the driver tx queues */
2513         iwl_setup_watchdog(priv);
2514
2515         if (iwl_is_rfkill(priv))
2516                 return;
2517
2518         ieee80211_wake_queues(priv->hw);
2519
2520         priv->active_rate = IWL_RATES_MASK;
2521
2522         iwl_power_update_mode(priv, true);
2523
2524         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS)) {
2525                 struct iwl3945_rxon_cmd *active_rxon =
2526                                 (struct iwl3945_rxon_cmd *)(&ctx->active);
2527
2528                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2529                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2530         } else {
2531                 /* Initialize our rx_config data */
2532                 iwl_connection_init_rx_config(priv, ctx);
2533         }
2534
2535         /* Configure Bluetooth device coexistence support */
2536         priv->cfg->ops->hcmd->send_bt_config(priv);
2537
2538         /* Configure the adapter for unassociated operation */
2539         iwl3945_commit_rxon(priv, ctx);
2540
2541         iwl3945_reg_txpower_periodic(priv);
2542
2543         iwl_leds_init(priv);
2544
2545         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2546         set_bit(STATUS_READY, &priv->status);
2547         wake_up_interruptible(&priv->wait_command_queue);
2548
2549         return;
2550
2551  restart:
2552         queue_work(priv->workqueue, &priv->restart);
2553 }
2554
2555 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2556
2557 static void __iwl3945_down(struct iwl_priv *priv)
2558 {
2559         unsigned long flags;
2560         int exit_pending;
2561
2562         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2563
2564         iwl_scan_cancel_timeout(priv, 200);
2565
2566         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2567
2568         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2569          * to prevent rearm timer */
2570         del_timer_sync(&priv->watchdog);
2571
2572         /* Station information will now be cleared in device */
2573         iwl_clear_ucode_stations(priv, NULL);
2574         iwl_dealloc_bcast_stations(priv);
2575         iwl_clear_driver_stations(priv);
2576
2577         /* Unblock any waiting calls */
2578         wake_up_interruptible_all(&priv->wait_command_queue);
2579
2580         /* Wipe out the EXIT_PENDING status bit if we are not actually
2581          * exiting the module */
2582         if (!exit_pending)
2583                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2584
2585         /* stop and reset the on-board processor */
2586         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2587
2588         /* tell the device to stop sending interrupts */
2589         spin_lock_irqsave(&priv->lock, flags);
2590         iwl_disable_interrupts(priv);
2591         spin_unlock_irqrestore(&priv->lock, flags);
2592         iwl_synchronize_irq(priv);
2593
2594         if (priv->mac80211_registered)
2595                 ieee80211_stop_queues(priv->hw);
2596
2597         /* If we have not previously called iwl3945_init() then
2598          * clear all bits but the RF Kill bits and return */
2599         if (!iwl_is_init(priv)) {
2600                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2601                                         STATUS_RF_KILL_HW |
2602                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2603                                         STATUS_GEO_CONFIGURED |
2604                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2605                                         STATUS_EXIT_PENDING;
2606                 goto exit;
2607         }
2608
2609         /* ...otherwise clear out all the status bits but the RF Kill
2610          * bit and continue taking the NIC down. */
2611         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2612                                 STATUS_RF_KILL_HW |
2613                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2614                                 STATUS_GEO_CONFIGURED |
2615                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2616                                 STATUS_FW_ERROR |
2617                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2618                                 STATUS_EXIT_PENDING;
2619
2620         iwl3945_hw_txq_ctx_stop(priv);
2621         iwl3945_hw_rxq_stop(priv);
2622
2623         /* Power-down device's busmaster DMA clocks */
2624         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2625         udelay(5);
2626
2627         /* Stop the device, and put it in low power state */
2628         iwl_apm_stop(priv);
2629
2630  exit:
2631         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2632
2633         if (priv->beacon_skb)
2634                 dev_kfree_skb(priv->beacon_skb);
2635         priv->beacon_skb = NULL;
2636
2637         /* clear out any free frames */
2638         iwl3945_clear_free_frames(priv);
2639 }
2640
2641 static void iwl3945_down(struct iwl_priv *priv)
2642 {
2643         mutex_lock(&priv->mutex);
2644         __iwl3945_down(priv);
2645         mutex_unlock(&priv->mutex);
2646
2647         iwl3945_cancel_deferred_work(priv);
2648 }
2649
2650 #define MAX_HW_RESTARTS 5
2651
2652 static int iwl3945_alloc_bcast_station(struct iwl_priv *priv)
2653 {
2654         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2655         unsigned long flags;
2656         u8 sta_id;
2657
2658         spin_lock_irqsave(&priv->sta_lock, flags);
2659         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
2660         if (sta_id == IWL_INVALID_STATION) {
2661                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
2662                 spin_unlock_irqrestore(&priv->sta_lock, flags);
2663
2664                 return -EINVAL;
2665         }
2666
2667         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
2668         priv->stations[sta_id].used |= IWL_STA_BCAST;
2669         spin_unlock_irqrestore(&priv->sta_lock, flags);
2670
2671         return 0;
2672 }
2673
2674 static int __iwl3945_up(struct iwl_priv *priv)
2675 {
2676         int rc, i;
2677
2678         rc = iwl3945_alloc_bcast_station(priv);
2679         if (rc)
2680                 return rc;
2681
2682         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2683                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2684                 return -EIO;
2685         }
2686
2687         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2688                 IWL_ERR(priv, "ucode not available for device bring up\n");
2689                 return -EIO;
2690         }
2691
2692         /* If platform's RF_KILL switch is NOT set to KILL */
2693         if (iwl_read32(priv, CSR_GP_CNTRL) &
2694                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2695                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2696         else {
2697                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2698                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2699                 return -ENODEV;
2700         }
2701
2702         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2703
2704         rc = iwl3945_hw_nic_init(priv);
2705         if (rc) {
2706                 IWL_ERR(priv, "Unable to int nic\n");
2707                 return rc;
2708         }
2709
2710         /* make sure rfkill handshake bits are cleared */
2711         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2712         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2713                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2714
2715         /* clear (again), then enable host interrupts */
2716         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2717         iwl_enable_interrupts(priv);
2718
2719         /* really make sure rfkill handshake bits are cleared */
2720         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2721         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2722
2723         /* Copy original ucode data image from disk into backup cache.
2724          * This will be used to initialize the on-board processor's
2725          * data SRAM for a clean start when the runtime program first loads. */
2726         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2727                priv->ucode_data.len);
2728
2729         /* We return success when we resume from suspend and rf_kill is on. */
2730         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2731                 return 0;
2732
2733         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2734
2735                 /* load bootstrap state machine,
2736                  * load bootstrap program into processor's memory,
2737                  * prepare to load the "initialize" uCode */
2738                 rc = priv->cfg->ops->lib->load_ucode(priv);
2739
2740                 if (rc) {
2741                         IWL_ERR(priv,
2742                                 "Unable to set up bootstrap uCode: %d\n", rc);
2743                         continue;
2744                 }
2745
2746                 /* start card; "initialize" will load runtime ucode */
2747                 iwl3945_nic_start(priv);
2748
2749                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2750
2751                 return 0;
2752         }
2753
2754         set_bit(STATUS_EXIT_PENDING, &priv->status);
2755         __iwl3945_down(priv);
2756         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2757
2758         /* tried to restart and config the device for as long as our
2759          * patience could withstand */
2760         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2761         return -EIO;
2762 }
2763
2764
2765 /*****************************************************************************
2766  *
2767  * Workqueue callbacks
2768  *
2769  *****************************************************************************/
2770
2771 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2772 {
2773         struct iwl_priv *priv =
2774             container_of(data, struct iwl_priv, init_alive_start.work);
2775
2776         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2777                 return;
2778
2779         mutex_lock(&priv->mutex);
2780         iwl3945_init_alive_start(priv);
2781         mutex_unlock(&priv->mutex);
2782 }
2783
2784 static void iwl3945_bg_alive_start(struct work_struct *data)
2785 {
2786         struct iwl_priv *priv =
2787             container_of(data, struct iwl_priv, alive_start.work);
2788
2789         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2790                 return;
2791
2792         mutex_lock(&priv->mutex);
2793         iwl3945_alive_start(priv);
2794         mutex_unlock(&priv->mutex);
2795 }
2796
2797 /*
2798  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2799  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2800  * *is* readable even when device has been SW_RESET into low power mode
2801  * (e.g. during RF KILL).
2802  */
2803 static void iwl3945_rfkill_poll(struct work_struct *data)
2804 {
2805         struct iwl_priv *priv =
2806             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2807         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2808         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2809                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2810
2811         if (new_rfkill != old_rfkill) {
2812                 if (new_rfkill)
2813                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2814                 else
2815                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2816
2817                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2818
2819                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2820                                 new_rfkill ? "disable radio" : "enable radio");
2821         }
2822
2823         /* Keep this running, even if radio now enabled.  This will be
2824          * cancelled in mac_start() if system decides to start again */
2825         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2826                            round_jiffies_relative(2 * HZ));
2827
2828 }
2829
2830 int iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2831 {
2832         struct iwl_host_cmd cmd = {
2833                 .id = REPLY_SCAN_CMD,
2834                 .len = sizeof(struct iwl3945_scan_cmd),
2835                 .flags = CMD_SIZE_HUGE,
2836         };
2837         struct iwl3945_scan_cmd *scan;
2838         u8 n_probes = 0;
2839         enum ieee80211_band band;
2840         bool is_active = false;
2841         int ret;
2842
2843         lockdep_assert_held(&priv->mutex);
2844
2845         if (!priv->scan_cmd) {
2846                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2847                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2848                 if (!priv->scan_cmd) {
2849                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2850                         return -ENOMEM;
2851                 }
2852         }
2853         scan = priv->scan_cmd;
2854         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2855
2856         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2857         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2858
2859         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS)) {
2860                 u16 interval = 0;
2861                 u32 extra;
2862                 u32 suspend_time = 100;
2863                 u32 scan_suspend_time = 100;
2864                 unsigned long flags;
2865
2866                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2867
2868                 spin_lock_irqsave(&priv->lock, flags);
2869                 if (priv->is_internal_short_scan)
2870                         interval = 0;
2871                 else
2872                         interval = vif->bss_conf.beacon_int;
2873                 spin_unlock_irqrestore(&priv->lock, flags);
2874
2875                 scan->suspend_time = 0;
2876                 scan->max_out_time = cpu_to_le32(200 * 1024);
2877                 if (!interval)
2878                         interval = suspend_time;
2879                 /*
2880                  * suspend time format:
2881                  *  0-19: beacon interval in usec (time before exec.)
2882                  * 20-23: 0
2883                  * 24-31: number of beacons (suspend between channels)
2884                  */
2885
2886                 extra = (suspend_time / interval) << 24;
2887                 scan_suspend_time = 0xFF0FFFFF &
2888                     (extra | ((suspend_time % interval) * 1024));
2889
2890                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2891                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2892                                scan_suspend_time, interval);
2893         }
2894
2895         if (priv->is_internal_short_scan) {
2896                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2897         } else if (priv->scan_request->n_ssids) {
2898                 int i, p = 0;
2899                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2900                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2901                         /* always does wildcard anyway */
2902                         if (!priv->scan_request->ssids[i].ssid_len)
2903                                 continue;
2904                         scan->direct_scan[p].id = WLAN_EID_SSID;
2905                         scan->direct_scan[p].len =
2906                                 priv->scan_request->ssids[i].ssid_len;
2907                         memcpy(scan->direct_scan[p].ssid,
2908                                priv->scan_request->ssids[i].ssid,
2909                                priv->scan_request->ssids[i].ssid_len);
2910                         n_probes++;
2911                         p++;
2912                 }
2913                 is_active = true;
2914         } else
2915                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2916
2917         /* We don't build a direct scan probe request; the uCode will do
2918          * that based on the direct_mask added to each channel entry */
2919         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2920         scan->tx_cmd.sta_id = priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
2921         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2922
2923         /* flags + rate selection */
2924
2925         switch (priv->scan_band) {
2926         case IEEE80211_BAND_2GHZ:
2927                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2928                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2929                 band = IEEE80211_BAND_2GHZ;
2930                 break;
2931         case IEEE80211_BAND_5GHZ:
2932                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2933                 band = IEEE80211_BAND_5GHZ;
2934                 break;
2935         default:
2936                 IWL_WARN(priv, "Invalid scan band\n");
2937                 return -EIO;
2938         }
2939
2940         /*
2941          * If active scaning is requested but a certain channel
2942          * is marked passive, we can do active scanning if we
2943          * detect transmissions.
2944          */
2945         scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2946                                         IWL_GOOD_CRC_TH_DISABLED;
2947
2948         if (!priv->is_internal_short_scan) {
2949                 scan->tx_cmd.len = cpu_to_le16(
2950                         iwl_fill_probe_req(priv,
2951                                 (struct ieee80211_mgmt *)scan->data,
2952                                 vif->addr,
2953                                 priv->scan_request->ie,
2954                                 priv->scan_request->ie_len,
2955                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2956         } else {
2957                 /* use bcast addr, will not be transmitted but must be valid */
2958                 scan->tx_cmd.len = cpu_to_le16(
2959                         iwl_fill_probe_req(priv,
2960                                 (struct ieee80211_mgmt *)scan->data,
2961                                 iwl_bcast_addr, NULL, 0,
2962                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2963         }
2964         /* select Rx antennas */
2965         scan->flags |= iwl3945_get_antenna_flags(priv);
2966
2967         if (priv->is_internal_short_scan) {
2968                 scan->channel_count =
2969                         iwl3945_get_single_channel_for_scan(priv, vif, band,
2970                                 (void *)&scan->data[le16_to_cpu(
2971                                 scan->tx_cmd.len)]);
2972         } else {
2973                 scan->channel_count =
2974                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2975                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2976         }
2977
2978         if (scan->channel_count == 0) {
2979                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2980                 return -EIO;
2981         }
2982
2983         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2984             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2985         cmd.data = scan;
2986         scan->len = cpu_to_le16(cmd.len);
2987
2988         set_bit(STATUS_SCAN_HW, &priv->status);
2989         ret = iwl_send_cmd_sync(priv, &cmd);
2990         if (ret)
2991                 clear_bit(STATUS_SCAN_HW, &priv->status);
2992         return ret;
2993 }
2994
2995 void iwl3945_post_scan(struct iwl_priv *priv)
2996 {
2997         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2998
2999         /*
3000          * Since setting the RXON may have been deferred while
3001          * performing the scan, fire one off if needed
3002          */
3003         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
3004                 iwl3945_commit_rxon(priv, ctx);
3005 }
3006
3007 static void iwl3945_bg_restart(struct work_struct *data)
3008 {
3009         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3010
3011         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3012                 return;
3013
3014         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3015                 struct iwl_rxon_context *ctx;
3016                 mutex_lock(&priv->mutex);
3017                 for_each_context(priv, ctx)
3018                         ctx->vif = NULL;
3019                 priv->is_open = 0;
3020                 mutex_unlock(&priv->mutex);
3021                 iwl3945_down(priv);
3022                 ieee80211_restart_hw(priv->hw);
3023         } else {
3024                 iwl3945_down(priv);
3025
3026                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3027                         return;
3028
3029                 mutex_lock(&priv->mutex);
3030                 __iwl3945_up(priv);
3031                 mutex_unlock(&priv->mutex);
3032         }
3033 }
3034
3035 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3036 {
3037         struct iwl_priv *priv =
3038             container_of(data, struct iwl_priv, rx_replenish);
3039
3040         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3041                 return;
3042
3043         mutex_lock(&priv->mutex);
3044         iwl3945_rx_replenish(priv);
3045         mutex_unlock(&priv->mutex);
3046 }
3047
3048 void iwl3945_post_associate(struct iwl_priv *priv)
3049 {
3050         int rc = 0;
3051         struct ieee80211_conf *conf = NULL;
3052         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3053
3054         if (!ctx->vif || !priv->is_open)
3055                 return;
3056
3057         if (ctx->vif->type == NL80211_IFTYPE_AP) {
3058                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3059                 return;
3060         }
3061
3062         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3063                         ctx->vif->bss_conf.aid, ctx->active.bssid_addr);
3064
3065         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3066                 return;
3067
3068         iwl_scan_cancel_timeout(priv, 200);
3069
3070         conf = ieee80211_get_hw_conf(priv->hw);
3071
3072         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3073         iwl3945_commit_rxon(priv, ctx);
3074
3075         rc = iwl_send_rxon_timing(priv, ctx);
3076         if (rc)
3077                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3078                             "Attempting to continue.\n");
3079
3080         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3081
3082         ctx->staging.assoc_id = cpu_to_le16(ctx->vif->bss_conf.aid);
3083
3084         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3085                         ctx->vif->bss_conf.aid, ctx->vif->bss_conf.beacon_int);
3086
3087         if (ctx->vif->bss_conf.use_short_preamble)
3088                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3089         else
3090                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3091
3092         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3093                 if (ctx->vif->bss_conf.use_short_slot)
3094                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3095                 else
3096                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3097         }
3098
3099         iwl3945_commit_rxon(priv, ctx);
3100
3101         switch (ctx->vif->type) {
3102         case NL80211_IFTYPE_STATION:
3103                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3104                 break;
3105         case NL80211_IFTYPE_ADHOC:
3106                 iwl3945_send_beacon_cmd(priv);
3107                 break;
3108         default:
3109                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3110                         __func__, ctx->vif->type);
3111                 break;
3112         }
3113 }
3114
3115 /*****************************************************************************
3116  *
3117  * mac80211 entry point functions
3118  *
3119  *****************************************************************************/
3120
3121 #define UCODE_READY_TIMEOUT     (2 * HZ)
3122
3123 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3124 {
3125         struct iwl_priv *priv = hw->priv;
3126         int ret;
3127
3128         IWL_DEBUG_MAC80211(priv, "enter\n");
3129
3130         /* we should be verifying the device is ready to be opened */
3131         mutex_lock(&priv->mutex);
3132
3133         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3134          * ucode filename and max sizes are card-specific. */
3135
3136         if (!priv->ucode_code.len) {
3137                 ret = iwl3945_read_ucode(priv);
3138                 if (ret) {
3139                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3140                         mutex_unlock(&priv->mutex);
3141                         goto out_release_irq;
3142                 }
3143         }
3144
3145         ret = __iwl3945_up(priv);
3146
3147         mutex_unlock(&priv->mutex);
3148
3149         if (ret)
3150                 goto out_release_irq;
3151
3152         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3153
3154         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3155          * mac80211 will not be run successfully. */
3156         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3157                         test_bit(STATUS_READY, &priv->status),
3158                         UCODE_READY_TIMEOUT);
3159         if (!ret) {
3160                 if (!test_bit(STATUS_READY, &priv->status)) {
3161                         IWL_ERR(priv,
3162                                 "Wait for START_ALIVE timeout after %dms.\n",
3163                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3164                         ret = -ETIMEDOUT;
3165                         goto out_release_irq;
3166                 }
3167         }
3168
3169         /* ucode is running and will send rfkill notifications,
3170          * no need to poll the killswitch state anymore */
3171         cancel_delayed_work(&priv->_3945.rfkill_poll);
3172
3173         iwl_led_start(priv);
3174
3175         priv->is_open = 1;
3176         IWL_DEBUG_MAC80211(priv, "leave\n");
3177         return 0;
3178
3179 out_release_irq:
3180         priv->is_open = 0;
3181         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3182         return ret;
3183 }
3184
3185 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3186 {
3187         struct iwl_priv *priv = hw->priv;
3188
3189         IWL_DEBUG_MAC80211(priv, "enter\n");
3190
3191         if (!priv->is_open) {
3192                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3193                 return;
3194         }
3195
3196         priv->is_open = 0;
3197
3198         iwl3945_down(priv);
3199
3200         flush_workqueue(priv->workqueue);
3201
3202         /* start polling the killswitch state again */
3203         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3204                            round_jiffies_relative(2 * HZ));
3205
3206         IWL_DEBUG_MAC80211(priv, "leave\n");
3207 }
3208
3209 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3210 {
3211         struct iwl_priv *priv = hw->priv;
3212
3213         IWL_DEBUG_MAC80211(priv, "enter\n");
3214
3215         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3216                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3217
3218         if (iwl3945_tx_skb(priv, skb))
3219                 dev_kfree_skb_any(skb);
3220
3221         IWL_DEBUG_MAC80211(priv, "leave\n");
3222         return NETDEV_TX_OK;
3223 }
3224
3225 void iwl3945_config_ap(struct iwl_priv *priv)
3226 {
3227         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3228         struct ieee80211_vif *vif = ctx->vif;
3229         int rc = 0;
3230
3231         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3232                 return;
3233
3234         /* The following should be done only at AP bring up */
3235         if (!(iwl_is_associated(priv, IWL_RXON_CTX_BSS))) {
3236
3237                 /* RXON - unassoc (to set timing command) */
3238                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3239                 iwl3945_commit_rxon(priv, ctx);
3240
3241                 /* RXON Timing */
3242                 rc = iwl_send_rxon_timing(priv, ctx);
3243                 if (rc)
3244                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3245                                         "Attempting to continue.\n");
3246
3247                 ctx->staging.assoc_id = 0;
3248
3249                 if (vif->bss_conf.use_short_preamble)
3250                         ctx->staging.flags |=
3251                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3252                 else
3253                         ctx->staging.flags &=
3254                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3255
3256                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3257                         if (vif->bss_conf.use_short_slot)
3258                                 ctx->staging.flags |=
3259                                         RXON_FLG_SHORT_SLOT_MSK;
3260                         else
3261                                 ctx->staging.flags &=
3262                                         ~RXON_FLG_SHORT_SLOT_MSK;
3263                 }
3264                 /* restore RXON assoc */
3265                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3266                 iwl3945_commit_rxon(priv, ctx);
3267         }
3268         iwl3945_send_beacon_cmd(priv);
3269
3270         /* FIXME - we need to add code here to detect a totally new
3271          * configuration, reset the AP, unassoc, rxon timing, assoc,
3272          * clear sta table, add BCAST sta... */
3273 }
3274
3275 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3276                                struct ieee80211_vif *vif,
3277                                struct ieee80211_sta *sta,
3278                                struct ieee80211_key_conf *key)
3279 {
3280         struct iwl_priv *priv = hw->priv;
3281         int ret = 0;
3282         u8 sta_id = IWL_INVALID_STATION;
3283         u8 static_key;
3284
3285         IWL_DEBUG_MAC80211(priv, "enter\n");
3286
3287         if (iwl3945_mod_params.sw_crypto) {
3288                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3289                 return -EOPNOTSUPP;
3290         }
3291
3292         static_key = !iwl_is_associated(priv, IWL_RXON_CTX_BSS);
3293
3294         if (!static_key) {
3295                 sta_id = iwl_sta_id_or_broadcast(
3296                                 priv, &priv->contexts[IWL_RXON_CTX_BSS], sta);
3297                 if (sta_id == IWL_INVALID_STATION)
3298                         return -EINVAL;
3299         }
3300
3301         mutex_lock(&priv->mutex);
3302         iwl_scan_cancel_timeout(priv, 100);
3303
3304         switch (cmd) {
3305         case SET_KEY:
3306                 if (static_key)
3307                         ret = iwl3945_set_static_key(priv, key);
3308                 else
3309                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3310                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3311                 break;
3312         case DISABLE_KEY:
3313                 if (static_key)
3314                         ret = iwl3945_remove_static_key(priv);
3315                 else
3316                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3317                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3318                 break;
3319         default:
3320                 ret = -EINVAL;
3321         }
3322
3323         mutex_unlock(&priv->mutex);
3324         IWL_DEBUG_MAC80211(priv, "leave\n");
3325
3326         return ret;
3327 }
3328
3329 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3330                                struct ieee80211_vif *vif,
3331                                struct ieee80211_sta *sta)
3332 {
3333         struct iwl_priv *priv = hw->priv;
3334         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3335         int ret;
3336         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3337         u8 sta_id;
3338
3339         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3340                         sta->addr);
3341         mutex_lock(&priv->mutex);
3342         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
3343                         sta->addr);
3344         sta_priv->common.sta_id = IWL_INVALID_STATION;
3345
3346
3347         ret = iwl_add_station_common(priv, &priv->contexts[IWL_RXON_CTX_BSS],
3348                                      sta->addr, is_ap, sta, &sta_id);
3349         if (ret) {
3350                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3351                         sta->addr, ret);
3352                 /* Should we return success if return code is EEXIST ? */
3353                 mutex_unlock(&priv->mutex);
3354                 return ret;
3355         }
3356
3357         sta_priv->common.sta_id = sta_id;
3358
3359         /* Initialize rate scaling */
3360         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3361                        sta->addr);
3362         iwl3945_rs_rate_init(priv, sta, sta_id);
3363         mutex_unlock(&priv->mutex);
3364
3365         return 0;
3366 }
3367
3368 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
3369                                      unsigned int changed_flags,
3370                                      unsigned int *total_flags,
3371                                      u64 multicast)
3372 {
3373         struct iwl_priv *priv = hw->priv;
3374         __le32 filter_or = 0, filter_nand = 0;
3375         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3376
3377 #define CHK(test, flag) do { \
3378         if (*total_flags & (test))              \
3379                 filter_or |= (flag);            \
3380         else                                    \
3381                 filter_nand |= (flag);          \
3382         } while (0)
3383
3384         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3385                         changed_flags, *total_flags);
3386
3387         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3388         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3389         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3390
3391 #undef CHK
3392
3393         mutex_lock(&priv->mutex);
3394
3395         ctx->staging.filter_flags &= ~filter_nand;
3396         ctx->staging.filter_flags |= filter_or;
3397
3398         /*
3399          * Not committing directly because hardware can perform a scan,
3400          * but even if hw is ready, committing here breaks for some reason,
3401          * we'll eventually commit the filter flags change anyway.
3402          */
3403
3404         mutex_unlock(&priv->mutex);
3405
3406         /*
3407          * Receiving all multicast frames is always enabled by the
3408          * default flags setup in iwl_connection_init_rx_config()
3409          * since we currently do not support programming multicast
3410          * filters into the device.
3411          */
3412         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3413                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3414 }
3415
3416
3417 /*****************************************************************************
3418  *
3419  * sysfs attributes
3420  *
3421  *****************************************************************************/
3422
3423 #ifdef CONFIG_IWLWIFI_DEBUG
3424
3425 /*
3426  * The following adds a new attribute to the sysfs representation
3427  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3428  * used for controlling the debug level.
3429  *
3430  * See the level definitions in iwl for details.
3431  *
3432  * The debug_level being managed using sysfs below is a per device debug
3433  * level that is used instead of the global debug level if it (the per
3434  * device debug level) is set.
3435  */
3436 static ssize_t show_debug_level(struct device *d,
3437                                 struct device_attribute *attr, char *buf)
3438 {
3439         struct iwl_priv *priv = dev_get_drvdata(d);
3440         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3441 }
3442 static ssize_t store_debug_level(struct device *d,
3443                                 struct device_attribute *attr,
3444                                  const char *buf, size_t count)
3445 {
3446         struct iwl_priv *priv = dev_get_drvdata(d);
3447         unsigned long val;
3448         int ret;
3449
3450         ret = strict_strtoul(buf, 0, &val);
3451         if (ret)
3452                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3453         else {
3454                 priv->debug_level = val;
3455                 if (iwl_alloc_traffic_mem(priv))
3456                         IWL_ERR(priv,
3457                                 "Not enough memory to generate traffic log\n");
3458         }
3459         return strnlen(buf, count);
3460 }
3461
3462 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3463                         show_debug_level, store_debug_level);
3464
3465 #endif /* CONFIG_IWLWIFI_DEBUG */
3466
3467 static ssize_t show_temperature(struct device *d,
3468                                 struct device_attribute *attr, char *buf)
3469 {
3470         struct iwl_priv *priv = dev_get_drvdata(d);
3471
3472         if (!iwl_is_alive(priv))
3473                 return -EAGAIN;
3474
3475         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3476 }
3477
3478 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3479
3480 static ssize_t show_tx_power(struct device *d,
3481                              struct device_attribute *attr, char *buf)
3482 {
3483         struct iwl_priv *priv = dev_get_drvdata(d);
3484         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3485 }
3486
3487 static ssize_t store_tx_power(struct device *d,
3488                               struct device_attribute *attr,
3489                               const char *buf, size_t count)
3490 {
3491         struct iwl_priv *priv = dev_get_drvdata(d);
3492         char *p = (char *)buf;
3493         u32 val;
3494
3495         val = simple_strtoul(p, &p, 10);
3496         if (p == buf)
3497                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3498         else
3499                 iwl3945_hw_reg_set_txpower(priv, val);
3500
3501         return count;
3502 }
3503
3504 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3505
3506 static ssize_t show_flags(struct device *d,
3507                           struct device_attribute *attr, char *buf)
3508 {
3509         struct iwl_priv *priv = dev_get_drvdata(d);
3510         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3511
3512         return sprintf(buf, "0x%04X\n", ctx->active.flags);
3513 }
3514
3515 static ssize_t store_flags(struct device *d,
3516                            struct device_attribute *attr,
3517                            const char *buf, size_t count)
3518 {
3519         struct iwl_priv *priv = dev_get_drvdata(d);
3520         u32 flags = simple_strtoul(buf, NULL, 0);
3521         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3522
3523         mutex_lock(&priv->mutex);
3524         if (le32_to_cpu(ctx->staging.flags) != flags) {
3525                 /* Cancel any currently running scans... */
3526                 if (iwl_scan_cancel_timeout(priv, 100))
3527                         IWL_WARN(priv, "Could not cancel scan.\n");
3528                 else {
3529                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3530                                        flags);
3531                         ctx->staging.flags = cpu_to_le32(flags);
3532                         iwl3945_commit_rxon(priv, ctx);
3533                 }
3534         }
3535         mutex_unlock(&priv->mutex);
3536
3537         return count;
3538 }
3539
3540 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3541
3542 static ssize_t show_filter_flags(struct device *d,
3543                                  struct device_attribute *attr, char *buf)
3544 {
3545         struct iwl_priv *priv = dev_get_drvdata(d);
3546         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3547
3548         return sprintf(buf, "0x%04X\n",
3549                 le32_to_cpu(ctx->active.filter_flags));
3550 }
3551
3552 static ssize_t store_filter_flags(struct device *d,
3553                                   struct device_attribute *attr,
3554                                   const char *buf, size_t count)
3555 {
3556         struct iwl_priv *priv = dev_get_drvdata(d);
3557         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3558         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3559
3560         mutex_lock(&priv->mutex);
3561         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3562                 /* Cancel any currently running scans... */
3563                 if (iwl_scan_cancel_timeout(priv, 100))
3564                         IWL_WARN(priv, "Could not cancel scan.\n");
3565                 else {
3566                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3567                                        "0x%04X\n", filter_flags);
3568                         ctx->staging.filter_flags =
3569                                 cpu_to_le32(filter_flags);
3570                         iwl3945_commit_rxon(priv, ctx);
3571                 }
3572         }
3573         mutex_unlock(&priv->mutex);
3574
3575         return count;
3576 }
3577
3578 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3579                    store_filter_flags);
3580
3581 static ssize_t show_measurement(struct device *d,
3582                                 struct device_attribute *attr, char *buf)
3583 {
3584         struct iwl_priv *priv = dev_get_drvdata(d);
3585         struct iwl_spectrum_notification measure_report;
3586         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3587         u8 *data = (u8 *)&measure_report;
3588         unsigned long flags;
3589
3590         spin_lock_irqsave(&priv->lock, flags);
3591         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3592                 spin_unlock_irqrestore(&priv->lock, flags);
3593                 return 0;
3594         }
3595         memcpy(&measure_report, &priv->measure_report, size);
3596         priv->measurement_status = 0;
3597         spin_unlock_irqrestore(&priv->lock, flags);
3598
3599         while (size && (PAGE_SIZE - len)) {
3600                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3601                                    PAGE_SIZE - len, 1);
3602                 len = strlen(buf);
3603                 if (PAGE_SIZE - len)
3604                         buf[len++] = '\n';
3605
3606                 ofs += 16;
3607                 size -= min(size, 16U);
3608         }
3609
3610         return len;
3611 }
3612
3613 static ssize_t store_measurement(struct device *d,
3614                                  struct device_attribute *attr,
3615                                  const char *buf, size_t count)
3616 {
3617         struct iwl_priv *priv = dev_get_drvdata(d);
3618         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3619         struct ieee80211_measurement_params params = {
3620                 .channel = le16_to_cpu(ctx->active.channel),
3621                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3622                 .duration = cpu_to_le16(1),
3623         };
3624         u8 type = IWL_MEASURE_BASIC;
3625         u8 buffer[32];
3626         u8 channel;
3627
3628         if (count) {
3629                 char *p = buffer;
3630                 strncpy(buffer, buf, min(sizeof(buffer), count));
3631                 channel = simple_strtoul(p, NULL, 0);
3632                 if (channel)
3633                         params.channel = channel;
3634
3635                 p = buffer;
3636                 while (*p && *p != ' ')
3637                         p++;
3638                 if (*p)
3639                         type = simple_strtoul(p + 1, NULL, 0);
3640         }
3641
3642         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3643                        "channel %d (for '%s')\n", type, params.channel, buf);
3644         iwl3945_get_measurement(priv, &params, type);
3645
3646         return count;
3647 }
3648
3649 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3650                    show_measurement, store_measurement);
3651
3652 static ssize_t store_retry_rate(struct device *d,
3653                                 struct device_attribute *attr,
3654                                 const char *buf, size_t count)
3655 {
3656         struct iwl_priv *priv = dev_get_drvdata(d);
3657
3658         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3659         if (priv->retry_rate <= 0)
3660                 priv->retry_rate = 1;
3661
3662         return count;
3663 }
3664
3665 static ssize_t show_retry_rate(struct device *d,
3666                                struct device_attribute *attr, char *buf)
3667 {
3668         struct iwl_priv *priv = dev_get_drvdata(d);
3669         return sprintf(buf, "%d", priv->retry_rate);
3670 }
3671
3672 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3673                    store_retry_rate);
3674
3675
3676 static ssize_t show_channels(struct device *d,
3677                              struct device_attribute *attr, char *buf)
3678 {
3679         /* all this shit doesn't belong into sysfs anyway */
3680         return 0;
3681 }
3682
3683 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3684
3685 static ssize_t show_antenna(struct device *d,
3686                             struct device_attribute *attr, char *buf)
3687 {
3688         struct iwl_priv *priv = dev_get_drvdata(d);
3689
3690         if (!iwl_is_alive(priv))
3691                 return -EAGAIN;
3692
3693         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3694 }
3695
3696 static ssize_t store_antenna(struct device *d,
3697                              struct device_attribute *attr,
3698                              const char *buf, size_t count)
3699 {
3700         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3701         int ant;
3702
3703         if (count == 0)
3704                 return 0;
3705
3706         if (sscanf(buf, "%1i", &ant) != 1) {
3707                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3708                 return count;
3709         }
3710
3711         if ((ant >= 0) && (ant <= 2)) {
3712                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3713                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3714         } else
3715                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3716
3717
3718         return count;
3719 }
3720
3721 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3722
3723 static ssize_t show_status(struct device *d,
3724                            struct device_attribute *attr, char *buf)
3725 {
3726         struct iwl_priv *priv = dev_get_drvdata(d);
3727         if (!iwl_is_alive(priv))
3728                 return -EAGAIN;
3729         return sprintf(buf, "0x%08x\n", (int)priv->status);
3730 }
3731
3732 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3733
3734 static ssize_t dump_error_log(struct device *d,
3735                               struct device_attribute *attr,
3736                               const char *buf, size_t count)
3737 {
3738         struct iwl_priv *priv = dev_get_drvdata(d);
3739         char *p = (char *)buf;
3740
3741         if (p[0] == '1')
3742                 iwl3945_dump_nic_error_log(priv);
3743
3744         return strnlen(buf, count);
3745 }
3746
3747 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3748
3749 /*****************************************************************************
3750  *
3751  * driver setup and tear down
3752  *
3753  *****************************************************************************/
3754
3755 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3756 {
3757         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3758
3759         init_waitqueue_head(&priv->wait_command_queue);
3760
3761         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3762         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3763         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3764         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3765         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3766         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3767
3768         iwl_setup_scan_deferred_work(priv);
3769
3770         iwl3945_hw_setup_deferred_work(priv);
3771
3772         init_timer(&priv->watchdog);
3773         priv->watchdog.data = (unsigned long)priv;
3774         priv->watchdog.function = iwl_bg_watchdog;
3775
3776         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3777                      iwl3945_irq_tasklet, (unsigned long)priv);
3778 }
3779
3780 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3781 {
3782         iwl3945_hw_cancel_deferred_work(priv);
3783
3784         cancel_delayed_work_sync(&priv->init_alive_start);
3785         cancel_delayed_work(&priv->alive_start);
3786         cancel_work_sync(&priv->beacon_update);
3787
3788         iwl_cancel_scan_deferred_work(priv);
3789 }
3790
3791 static struct attribute *iwl3945_sysfs_entries[] = {
3792         &dev_attr_antenna.attr,
3793         &dev_attr_channels.attr,
3794         &dev_attr_dump_errors.attr,
3795         &dev_attr_flags.attr,
3796         &dev_attr_filter_flags.attr,
3797         &dev_attr_measurement.attr,
3798         &dev_attr_retry_rate.attr,
3799         &dev_attr_status.attr,
3800         &dev_attr_temperature.attr,
3801         &dev_attr_tx_power.attr,
3802 #ifdef CONFIG_IWLWIFI_DEBUG
3803         &dev_attr_debug_level.attr,
3804 #endif
3805         NULL
3806 };
3807
3808 static struct attribute_group iwl3945_attribute_group = {
3809         .name = NULL,           /* put in device directory */
3810         .attrs = iwl3945_sysfs_entries,
3811 };
3812
3813 struct ieee80211_ops iwl3945_hw_ops = {
3814         .tx = iwl3945_mac_tx,
3815         .start = iwl3945_mac_start,
3816         .stop = iwl3945_mac_stop,
3817         .add_interface = iwl_mac_add_interface,
3818         .remove_interface = iwl_mac_remove_interface,
3819         .change_interface = iwl_mac_change_interface,
3820         .config = iwl_legacy_mac_config,
3821         .configure_filter = iwl3945_configure_filter,
3822         .set_key = iwl3945_mac_set_key,
3823         .conf_tx = iwl_mac_conf_tx,
3824         .reset_tsf = iwl_legacy_mac_reset_tsf,
3825         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
3826         .hw_scan = iwl_mac_hw_scan,
3827         .sta_add = iwl3945_mac_sta_add,
3828         .sta_remove = iwl_mac_sta_remove,
3829         .tx_last_beacon = iwl_mac_tx_last_beacon,
3830 };
3831
3832 static int iwl3945_init_drv(struct iwl_priv *priv)
3833 {
3834         int ret;
3835         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3836
3837         priv->retry_rate = 1;
3838         priv->beacon_skb = NULL;
3839
3840         spin_lock_init(&priv->sta_lock);
3841         spin_lock_init(&priv->hcmd_lock);
3842
3843         INIT_LIST_HEAD(&priv->free_frames);
3844
3845         mutex_init(&priv->mutex);
3846         mutex_init(&priv->sync_cmd_mutex);
3847
3848         priv->ieee_channels = NULL;
3849         priv->ieee_rates = NULL;
3850         priv->band = IEEE80211_BAND_2GHZ;
3851
3852         priv->iw_mode = NL80211_IFTYPE_STATION;
3853         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3854
3855         /* initialize force reset */
3856         priv->force_reset[IWL_RF_RESET].reset_duration =
3857                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3858         priv->force_reset[IWL_FW_RESET].reset_duration =
3859                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3860
3861
3862         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3863         priv->tx_power_next = IWL_DEFAULT_TX_POWER;
3864
3865         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3866                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3867                          eeprom->version);
3868                 ret = -EINVAL;
3869                 goto err;
3870         }
3871         ret = iwl_init_channel_map(priv);
3872         if (ret) {
3873                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3874                 goto err;
3875         }
3876
3877         /* Set up txpower settings in driver for all channels */
3878         if (iwl3945_txpower_set_from_eeprom(priv)) {
3879                 ret = -EIO;
3880                 goto err_free_channel_map;
3881         }
3882
3883         ret = iwlcore_init_geos(priv);
3884         if (ret) {
3885                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3886                 goto err_free_channel_map;
3887         }
3888         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3889
3890         return 0;
3891
3892 err_free_channel_map:
3893         iwl_free_channel_map(priv);
3894 err:
3895         return ret;
3896 }
3897
3898 #define IWL3945_MAX_PROBE_REQUEST       200
3899
3900 static int iwl3945_setup_mac(struct iwl_priv *priv)
3901 {
3902         int ret;
3903         struct ieee80211_hw *hw = priv->hw;
3904
3905         hw->rate_control_algorithm = "iwl-3945-rs";
3906         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3907         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3908
3909         /* Tell mac80211 our characteristics */
3910         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3911                     IEEE80211_HW_SPECTRUM_MGMT;
3912
3913         if (!priv->cfg->base_params->broken_powersave)
3914                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3915                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3916
3917         hw->wiphy->interface_modes =
3918                 priv->contexts[IWL_RXON_CTX_BSS].interface_modes;
3919
3920         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3921                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3922
3923         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3924         /* we create the 802.11 header and a zero-length SSID element */
3925         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3926
3927         /* Default value; 4 EDCA QOS priorities */
3928         hw->queues = 4;
3929
3930         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3931                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3932                         &priv->bands[IEEE80211_BAND_2GHZ];
3933
3934         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3935                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3936                         &priv->bands[IEEE80211_BAND_5GHZ];
3937
3938         ret = ieee80211_register_hw(priv->hw);
3939         if (ret) {
3940                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3941                 return ret;
3942         }
3943         priv->mac80211_registered = 1;
3944
3945         return 0;
3946 }
3947
3948 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3949 {
3950         int err = 0, i;
3951         struct iwl_priv *priv;
3952         struct ieee80211_hw *hw;
3953         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3954         struct iwl3945_eeprom *eeprom;
3955         unsigned long flags;
3956
3957         /***********************
3958          * 1. Allocating HW data
3959          * ********************/
3960
3961         /* mac80211 allocates memory for this device instance, including
3962          *   space for this driver's private structure */
3963         hw = iwl_alloc_all(cfg);
3964         if (hw == NULL) {
3965                 pr_err("Can not allocate network device\n");
3966                 err = -ENOMEM;
3967                 goto out;
3968         }
3969         priv = hw->priv;
3970         SET_IEEE80211_DEV(hw, &pdev->dev);
3971
3972         priv->cmd_queue = IWL39_CMD_QUEUE_NUM;
3973
3974         /* 3945 has only one valid context */
3975         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3976
3977         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3978                 priv->contexts[i].ctxid = i;
3979
3980         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3981         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3982         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3983         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3984         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3985         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3986         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3987                 BIT(NL80211_IFTYPE_STATION) |
3988                 BIT(NL80211_IFTYPE_ADHOC);
3989         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3990         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3991         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3992
3993         /*
3994          * Disabling hardware scan means that mac80211 will perform scans
3995          * "the hard way", rather than using device's scan.
3996          */
3997         if (iwl3945_mod_params.disable_hw_scan) {
3998                 dev_printk(KERN_DEBUG, &(pdev->dev),
3999                         "sw scan support is deprecated\n");
4000                 iwl3945_hw_ops.hw_scan = NULL;
4001         }
4002
4003
4004         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4005         priv->cfg = cfg;
4006         priv->pci_dev = pdev;
4007         priv->inta_mask = CSR_INI_SET_MASK;
4008
4009         if (iwl_alloc_traffic_mem(priv))
4010                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4011
4012         /***************************
4013          * 2. Initializing PCI bus
4014          * *************************/
4015         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
4016                                 PCIE_LINK_STATE_CLKPM);
4017
4018         if (pci_enable_device(pdev)) {
4019                 err = -ENODEV;
4020                 goto out_ieee80211_free_hw;
4021         }
4022
4023         pci_set_master(pdev);
4024
4025         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4026         if (!err)
4027                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4028         if (err) {
4029                 IWL_WARN(priv, "No suitable DMA available.\n");
4030                 goto out_pci_disable_device;
4031         }
4032
4033         pci_set_drvdata(pdev, priv);
4034         err = pci_request_regions(pdev, DRV_NAME);
4035         if (err)
4036                 goto out_pci_disable_device;
4037
4038         /***********************
4039          * 3. Read REV Register
4040          * ********************/
4041         priv->hw_base = pci_iomap(pdev, 0, 0);
4042         if (!priv->hw_base) {
4043                 err = -ENODEV;
4044                 goto out_pci_release_regions;
4045         }
4046
4047         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4048                         (unsigned long long) pci_resource_len(pdev, 0));
4049         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4050
4051         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4052          * PCI Tx retries from interfering with C3 CPU state */
4053         pci_write_config_byte(pdev, 0x41, 0x00);
4054
4055         /* these spin locks will be used in apm_ops.init and EEPROM access
4056          * we should init now
4057          */
4058         spin_lock_init(&priv->reg_lock);
4059         spin_lock_init(&priv->lock);
4060
4061         /*
4062          * stop and reset the on-board processor just in case it is in a
4063          * strange state ... like being left stranded by a primary kernel
4064          * and this is now the kdump kernel trying to start up
4065          */
4066         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4067
4068         /***********************
4069          * 4. Read EEPROM
4070          * ********************/
4071
4072         /* Read the EEPROM */
4073         err = iwl_eeprom_init(priv);
4074         if (err) {
4075                 IWL_ERR(priv, "Unable to init EEPROM\n");
4076                 goto out_iounmap;
4077         }
4078         /* MAC Address location in EEPROM same for 3945/4965 */
4079         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4080         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
4081         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
4082
4083         /***********************
4084          * 5. Setup HW Constants
4085          * ********************/
4086         /* Device-specific setup */
4087         if (iwl3945_hw_set_hw_params(priv)) {
4088                 IWL_ERR(priv, "failed to set hw settings\n");
4089                 goto out_eeprom_free;
4090         }
4091
4092         /***********************
4093          * 6. Setup priv
4094          * ********************/
4095
4096         err = iwl3945_init_drv(priv);
4097         if (err) {
4098                 IWL_ERR(priv, "initializing driver failed\n");
4099                 goto out_unset_hw_params;
4100         }
4101
4102         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4103                 priv->cfg->name);
4104
4105         /***********************
4106          * 7. Setup Services
4107          * ********************/
4108
4109         spin_lock_irqsave(&priv->lock, flags);
4110         iwl_disable_interrupts(priv);
4111         spin_unlock_irqrestore(&priv->lock, flags);
4112
4113         pci_enable_msi(priv->pci_dev);
4114
4115         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr_ops.isr,
4116                           IRQF_SHARED, DRV_NAME, priv);
4117         if (err) {
4118                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4119                 goto out_disable_msi;
4120         }
4121
4122         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4123         if (err) {
4124                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4125                 goto out_release_irq;
4126         }
4127
4128         iwl_set_rxon_channel(priv,
4129                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5],
4130                              &priv->contexts[IWL_RXON_CTX_BSS]);
4131         iwl3945_setup_deferred_work(priv);
4132         iwl3945_setup_rx_handlers(priv);
4133         iwl_power_initialize(priv);
4134
4135         /*********************************
4136          * 8. Setup and Register mac80211
4137          * *******************************/
4138
4139         iwl_enable_interrupts(priv);
4140
4141         err = iwl3945_setup_mac(priv);
4142         if (err)
4143                 goto  out_remove_sysfs;
4144
4145         err = iwl_dbgfs_register(priv, DRV_NAME);
4146         if (err)
4147                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4148
4149         /* Start monitoring the killswitch */
4150         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4151                            2 * HZ);
4152
4153         return 0;
4154
4155  out_remove_sysfs:
4156         destroy_workqueue(priv->workqueue);
4157         priv->workqueue = NULL;
4158         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4159  out_release_irq:
4160         free_irq(priv->pci_dev->irq, priv);
4161  out_disable_msi:
4162         pci_disable_msi(priv->pci_dev);
4163         iwlcore_free_geos(priv);
4164         iwl_free_channel_map(priv);
4165  out_unset_hw_params:
4166         iwl3945_unset_hw_params(priv);
4167  out_eeprom_free:
4168         iwl_eeprom_free(priv);
4169  out_iounmap:
4170         pci_iounmap(pdev, priv->hw_base);
4171  out_pci_release_regions:
4172         pci_release_regions(pdev);
4173  out_pci_disable_device:
4174         pci_set_drvdata(pdev, NULL);
4175         pci_disable_device(pdev);
4176  out_ieee80211_free_hw:
4177         iwl_free_traffic_mem(priv);
4178         ieee80211_free_hw(priv->hw);
4179  out:
4180         return err;
4181 }
4182
4183 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4184 {
4185         struct iwl_priv *priv = pci_get_drvdata(pdev);
4186         unsigned long flags;
4187
4188         if (!priv)
4189                 return;
4190
4191         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4192
4193         iwl_dbgfs_unregister(priv);
4194
4195         set_bit(STATUS_EXIT_PENDING, &priv->status);
4196
4197         if (priv->mac80211_registered) {
4198                 ieee80211_unregister_hw(priv->hw);
4199                 priv->mac80211_registered = 0;
4200         } else {
4201                 iwl3945_down(priv);
4202         }
4203
4204         /*
4205          * Make sure device is reset to low power before unloading driver.
4206          * This may be redundant with iwl_down(), but there are paths to
4207          * run iwl_down() without calling apm_ops.stop(), and there are
4208          * paths to avoid running iwl_down() at all before leaving driver.
4209          * This (inexpensive) call *makes sure* device is reset.
4210          */
4211         iwl_apm_stop(priv);
4212
4213         /* make sure we flush any pending irq or
4214          * tasklet for the driver
4215          */
4216         spin_lock_irqsave(&priv->lock, flags);
4217         iwl_disable_interrupts(priv);
4218         spin_unlock_irqrestore(&priv->lock, flags);
4219
4220         iwl_synchronize_irq(priv);
4221
4222         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4223
4224         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4225
4226         iwl3945_dealloc_ucode_pci(priv);
4227
4228         if (priv->rxq.bd)
4229                 iwl3945_rx_queue_free(priv, &priv->rxq);
4230         iwl3945_hw_txq_ctx_free(priv);
4231
4232         iwl3945_unset_hw_params(priv);
4233
4234         /*netif_stop_queue(dev); */
4235         flush_workqueue(priv->workqueue);
4236
4237         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4238          * priv->workqueue... so we can't take down the workqueue
4239          * until now... */
4240         destroy_workqueue(priv->workqueue);
4241         priv->workqueue = NULL;
4242         iwl_free_traffic_mem(priv);
4243
4244         free_irq(pdev->irq, priv);
4245         pci_disable_msi(pdev);
4246
4247         pci_iounmap(pdev, priv->hw_base);
4248         pci_release_regions(pdev);
4249         pci_disable_device(pdev);
4250         pci_set_drvdata(pdev, NULL);
4251
4252         iwl_free_channel_map(priv);
4253         iwlcore_free_geos(priv);
4254         kfree(priv->scan_cmd);
4255         if (priv->beacon_skb)
4256                 dev_kfree_skb(priv->beacon_skb);
4257
4258         ieee80211_free_hw(priv->hw);
4259 }
4260
4261
4262 /*****************************************************************************
4263  *
4264  * driver and module entry point
4265  *
4266  *****************************************************************************/
4267
4268 static struct pci_driver iwl3945_driver = {
4269         .name = DRV_NAME,
4270         .id_table = iwl3945_hw_card_ids,
4271         .probe = iwl3945_pci_probe,
4272         .remove = __devexit_p(iwl3945_pci_remove),
4273         .driver.pm = IWL_PM_OPS,
4274 };
4275
4276 static int __init iwl3945_init(void)
4277 {
4278
4279         int ret;
4280         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
4281         pr_info(DRV_COPYRIGHT "\n");
4282
4283         ret = iwl3945_rate_control_register();
4284         if (ret) {
4285                 pr_err("Unable to register rate control algorithm: %d\n", ret);
4286                 return ret;
4287         }
4288
4289         ret = pci_register_driver(&iwl3945_driver);
4290         if (ret) {
4291                 pr_err("Unable to initialize PCI module\n");
4292                 goto error_register;
4293         }
4294
4295         return ret;
4296
4297 error_register:
4298         iwl3945_rate_control_unregister();
4299         return ret;
4300 }
4301
4302 static void __exit iwl3945_exit(void)
4303 {
4304         pci_unregister_driver(&iwl3945_driver);
4305         iwl3945_rate_control_unregister();
4306 }
4307
4308 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4309
4310 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4311 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4312 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4313 MODULE_PARM_DESC(swcrypto,
4314                  "using software crypto (default 1 [software])\n");
4315 #ifdef CONFIG_IWLWIFI_DEBUG
4316 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4317 MODULE_PARM_DESC(debug, "debug output mask");
4318 #endif
4319 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4320                    int, S_IRUGO);
4321 MODULE_PARM_DESC(disable_hw_scan,
4322                  "disable hardware scanning (default 0) (deprecated)");
4323 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4324 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4325
4326 module_exit(iwl3945_exit);
4327 module_init(iwl3945_init);