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