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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-core.h"
  57 #include "iwl-helpers.h"
  58 #include "iwl-dev.h"
  59 #include "iwl-spectrum.h"
  60
  61 /*
  62  * module name, copyright, version, etc.
  63  */
  64
  65 #define DRV_DESCRIPTION \
  66 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  67
  68 #ifdef CONFIG_IWLWIFI_DEBUG
  69 #define VD "d"
  70 #else
  71 #define VD
  72 #endif
  73
  74 /*
  75  * add "s" to indicate spectrum measurement included.
  76  * we add it here to be consistent with previous releases in which
  77  * this was configurable.
  78  */
  79 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82
  83 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  84 MODULE_VERSION(DRV_VERSION);
  85 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  86 MODULE_LICENSE("GPL");
  87
  88  /* module parameters */
  89 struct iwl_mod_params iwl3945_mod_params = {
  90         .sw_crypto = 1,
  91         .restart_fw = 1,
  92         /* the rest are 0 by default */
  93 };
  94
  95 /**
  96  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  97  * @priv: eeprom and antenna fields are used to determine antenna flags
  98  *
  99  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 100  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 101  *
 102  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 103  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 104  * IWL_ANTENNA_AUX       - Force AUX antenna
 105  */
 106 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 107 {
 108         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 109
 110         switch (iwl3945_mod_params.antenna) {
 111         case IWL_ANTENNA_DIVERSITY:
 112                 return 0;
 113
 114         case IWL_ANTENNA_MAIN:
 115                 if (eeprom->antenna_switch_type)
 116                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 117                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 118
 119         case IWL_ANTENNA_AUX:
 120                 if (eeprom->antenna_switch_type)
 121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 123         }
 124
 125         /* bad antenna selector value */
 126         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 127                 iwl3945_mod_params.antenna);
 128
 129         return 0;               /* "diversity" is default if error */
 130 }
 131
 132 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 133                                    struct ieee80211_key_conf *keyconf,
 134                                    u8 sta_id)
 135 {
 136         unsigned long flags;
 137         __le16 key_flags = 0;
 138         int ret;
 139
 140         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 141         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 142
 143         if (sta_id == priv->hw_params.bcast_sta_id)
 144                 key_flags |= STA_KEY_MULTICAST_MSK;
 145
 146         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 147         keyconf->hw_key_idx = keyconf->keyidx;
 148         key_flags &= ~STA_KEY_FLG_INVALID;
 149
 150         spin_lock_irqsave(&priv->sta_lock, flags);
 151         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 152         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 153         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 154                keyconf->keylen);
 155
 156         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 160                         == STA_KEY_FLG_NO_ENC)
 161                 priv->stations[sta_id].sta.key.key_offset =
 162                                  iwl_get_free_ucode_key_index(priv);
 163         /* else, we are overriding an existing key => no need to allocated room
 164         * in uCode. */
 165
 166         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 167                 "no space for a new key");
 168
 169         priv->stations[sta_id].sta.key.key_flags = key_flags;
 170         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 171         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 172
 173         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 174
 175         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 176
 177         spin_unlock_irqrestore(&priv->sta_lock, flags);
 178
 179         return ret;
 180 }
 181
 182 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 183                                   struct ieee80211_key_conf *keyconf,
 184                                   u8 sta_id)
 185 {
 186         return -EOPNOTSUPP;
 187 }
 188
 189 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 190                                   struct ieee80211_key_conf *keyconf,
 191                                   u8 sta_id)
 192 {
 193         return -EOPNOTSUPP;
 194 }
 195
 196 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 197 {
 198         unsigned long flags;
 199         struct iwl_addsta_cmd sta_cmd;
 200
 201         spin_lock_irqsave(&priv->sta_lock, flags);
 202         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 203         memset(&priv->stations[sta_id].sta.key, 0,
 204                 sizeof(struct iwl4965_keyinfo));
 205         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 206         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 207         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 208         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 209         spin_unlock_irqrestore(&priv->sta_lock, flags);
 210
 211         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 212         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 213 }
 214
 215 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 216                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 217 {
 218         int ret = 0;
 219
 220         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 221
 222         switch (keyconf->alg) {
 223         case ALG_CCMP:
 224                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 225                 break;
 226         case ALG_TKIP:
 227                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 228                 break;
 229         case ALG_WEP:
 230                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         default:
 233                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 234                 ret = -EINVAL;
 235         }
 236
 237         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 238                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 239                       sta_id, ret);
 240
 241         return ret;
 242 }
 243
 244 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 245 {
 246         int ret = -EOPNOTSUPP;
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_set_static_key(struct iwl_priv *priv,
 252                                 struct ieee80211_key_conf *key)
 253 {
 254         if (key->alg == ALG_WEP)
 255                 return -EOPNOTSUPP;
 256
 257         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 258         return -EINVAL;
 259 }
 260
 261 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 262 {
 263         struct list_head *element;
 264
 265         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 266                        priv->frames_count);
 267
 268         while (!list_empty(&priv->free_frames)) {
 269                 element = priv->free_frames.next;
 270                 list_del(element);
 271                 kfree(list_entry(element, struct iwl3945_frame, list));
 272                 priv->frames_count--;
 273         }
 274
 275         if (priv->frames_count) {
 276                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 277                             priv->frames_count);
 278                 priv->frames_count = 0;
 279         }
 280 }
 281
 282 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 283 {
 284         struct iwl3945_frame *frame;
 285         struct list_head *element;
 286         if (list_empty(&priv->free_frames)) {
 287                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 288                 if (!frame) {
 289                         IWL_ERR(priv, "Could not allocate frame!\n");
 290                         return NULL;
 291                 }
 292
 293                 priv->frames_count++;
 294                 return frame;
 295         }
 296
 297         element = priv->free_frames.next;
 298         list_del(element);
 299         return list_entry(element, struct iwl3945_frame, list);
 300 }
 301
 302 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 303 {
 304         memset(frame, 0, sizeof(*frame));
 305         list_add(&frame->list, &priv->free_frames);
 306 }
 307
 308 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 309                                 struct ieee80211_hdr *hdr,
 310                                 int left)
 311 {
 312
 313         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 314             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 315              (priv->iw_mode != NL80211_IFTYPE_AP)))
 316                 return 0;
 317
 318         if (priv->ibss_beacon->len > left)
 319                 return 0;
 320
 321         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 322
 323         return priv->ibss_beacon->len;
 324 }
 325
 326 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 327 {
 328         struct iwl3945_frame *frame;
 329         unsigned int frame_size;
 330         int rc;
 331         u8 rate;
 332
 333         frame = iwl3945_get_free_frame(priv);
 334
 335         if (!frame) {
 336                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 337                           "command.\n");
 338                 return -ENOMEM;
 339         }
 340
 341         rate = iwl_rate_get_lowest_plcp(priv);
 342
 343         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 344
 345         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 346                               &frame->u.cmd[0]);
 347
 348         iwl3945_free_frame(priv, frame);
 349
 350         return rc;
 351 }
 352
 353 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 354 {
 355         if (priv->_3945.shared_virt)
 356                 dma_free_coherent(&priv->pci_dev->dev,
 357                                   sizeof(struct iwl3945_shared),
 358                                   priv->_3945.shared_virt,
 359                                   priv->_3945.shared_phys);
 360 }
 361
 362 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 363                                       struct ieee80211_tx_info *info,
 364                                       struct iwl_device_cmd *cmd,
 365                                       struct sk_buff *skb_frag,
 366                                       int sta_id)
 367 {
 368         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 369         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 370
 371         switch (keyinfo->alg) {
 372         case ALG_CCMP:
 373                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 374                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 375                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 376                 break;
 377
 378         case ALG_TKIP:
 379                 break;
 380
 381         case ALG_WEP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 383                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 384
 385                 if (keyinfo->keylen == 13)
 386                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 387
 388                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 389
 390                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 391                              "with key %d\n", info->control.hw_key->hw_key_idx);
 392                 break;
 393
 394         default:
 395                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 396                 break;
 397         }
 398 }
 399
 400 /*
 401  * handle build REPLY_TX command notification.
 402  */
 403 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 404                                   struct iwl_device_cmd *cmd,
 405                                   struct ieee80211_tx_info *info,
 406                                   struct ieee80211_hdr *hdr, u8 std_id)
 407 {
 408         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 409         __le32 tx_flags = tx_cmd->tx_flags;
 410         __le16 fc = hdr->frame_control;
 411
 412         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 413         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 414                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 415                 if (ieee80211_is_mgmt(fc))
 416                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 417                 if (ieee80211_is_probe_resp(fc) &&
 418                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 419                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 420         } else {
 421                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 422                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 423         }
 424
 425         tx_cmd->sta_id = std_id;
 426         if (ieee80211_has_morefrags(fc))
 427                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 428
 429         if (ieee80211_is_data_qos(fc)) {
 430                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 431                 tx_cmd->tid_tspec = qc[0] & 0xf;
 432                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 433         } else {
 434                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 435         }
 436
 437         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 438
 439         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 440                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 441
 442         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 443         if (ieee80211_is_mgmt(fc)) {
 444                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 445                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 446                 else
 447                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 448         } else {
 449                 tx_cmd->timeout.pm_frame_timeout = 0;
 450         }
 451
 452         tx_cmd->driver_txop = 0;
 453         tx_cmd->tx_flags = tx_flags;
 454         tx_cmd->next_frame_len = 0;
 455 }
 456
 457 /*
 458  * start REPLY_TX command process
 459  */
 460 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 461 {
 462         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 463         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 464         struct iwl3945_tx_cmd *tx_cmd;
 465         struct iwl_tx_queue *txq = NULL;
 466         struct iwl_queue *q = NULL;
 467         struct iwl_device_cmd *out_cmd;
 468         struct iwl_cmd_meta *out_meta;
 469         dma_addr_t phys_addr;
 470         dma_addr_t txcmd_phys;
 471         int txq_id = skb_get_queue_mapping(skb);
 472         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 473         u8 id;
 474         u8 unicast;
 475         u8 sta_id;
 476         u8 tid = 0;
 477         __le16 fc;
 478         u8 wait_write_ptr = 0;
 479         unsigned long flags;
 480
 481         spin_lock_irqsave(&priv->lock, flags);
 482         if (iwl_is_rfkill(priv)) {
 483                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 484                 goto drop_unlock;
 485         }
 486
 487         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 488                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 489                 goto drop_unlock;
 490         }
 491
 492         unicast = !is_multicast_ether_addr(hdr->addr1);
 493         id = 0;
 494
 495         fc = hdr->frame_control;
 496
 497 #ifdef CONFIG_IWLWIFI_DEBUG
 498         if (ieee80211_is_auth(fc))
 499                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 500         else if (ieee80211_is_assoc_req(fc))
 501                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 502         else if (ieee80211_is_reassoc_req(fc))
 503                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 504 #endif
 505
 506         spin_unlock_irqrestore(&priv->lock, flags);
 507
 508         hdr_len = ieee80211_hdrlen(fc);
 509
 510         /* Find index into station table for destination station */
 511         sta_id = iwl_sta_id_or_broadcast(priv, info->control.sta);
 512         if (sta_id == IWL_INVALID_STATION) {
 513                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 514                                hdr->addr1);
 515                 goto drop;
 516         }
 517
 518         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 519
 520         if (ieee80211_is_data_qos(fc)) {
 521                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 522                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 523                 if (unlikely(tid >= MAX_TID_COUNT))
 524                         goto drop;
 525         }
 526
 527         /* Descriptor for chosen Tx queue */
 528         txq = &priv->txq[txq_id];
 529         q = &txq->q;
 530
 531         if ((iwl_queue_space(q) < q->high_mark))
 532                 goto drop;
 533
 534         spin_lock_irqsave(&priv->lock, flags);
 535
 536         idx = get_cmd_index(q, q->write_ptr, 0);
 537
 538         /* Set up driver data for this TFD */
 539         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 540         txq->txb[q->write_ptr].skb[0] = skb;
 541
 542         /* Init first empty entry in queue's array of Tx/cmd buffers */
 543         out_cmd = txq->cmd[idx];
 544         out_meta = &txq->meta[idx];
 545         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 546         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 547         memset(tx_cmd, 0, sizeof(*tx_cmd));
 548
 549         /*
 550          * Set up the Tx-command (not MAC!) header.
 551          * Store the chosen Tx queue and TFD index within the sequence field;
 552          * after Tx, uCode's Tx response will return this value so driver can
 553          * locate the frame within the tx queue and do post-tx processing.
 554          */
 555         out_cmd->hdr.cmd = REPLY_TX;
 556         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 557                                 INDEX_TO_SEQ(q->write_ptr)));
 558
 559         /* Copy MAC header from skb into command buffer */
 560         memcpy(tx_cmd->hdr, hdr, hdr_len);
 561
 562
 563         if (info->control.hw_key)
 564                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 565
 566         /* TODO need this for burst mode later on */
 567         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 568
 569         /* set is_hcca to 0; it probably will never be implemented */
 570         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 571
 572         /* Total # bytes to be transmitted */
 573         len = (u16)skb->len;
 574         tx_cmd->len = cpu_to_le16(len);
 575
 576         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 577         iwl_update_stats(priv, true, fc, len);
 578         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 579         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 580
 581         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 582                 txq->need_update = 1;
 583         } else {
 584                 wait_write_ptr = 1;
 585                 txq->need_update = 0;
 586         }
 587
 588         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 589                      le16_to_cpu(out_cmd->hdr.sequence));
 590         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 591         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 592         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 593                            ieee80211_hdrlen(fc));
 594
 595         /*
 596          * Use the first empty entry in this queue's command buffer array
 597          * to contain the Tx command and MAC header concatenated together
 598          * (payload data will be in another buffer).
 599          * Size of this varies, due to varying MAC header length.
 600          * If end is not dword aligned, we'll have 2 extra bytes at the end
 601          * of the MAC header (device reads on dword boundaries).
 602          * We'll tell device about this padding later.
 603          */
 604         len = sizeof(struct iwl3945_tx_cmd) +
 605                         sizeof(struct iwl_cmd_header) + hdr_len;
 606
 607         len_org = len;
 608         len = (len + 3) & ~3;
 609
 610         if (len_org != len)
 611                 len_org = 1;
 612         else
 613                 len_org = 0;
 614
 615         /* Physical address of this Tx command's header (not MAC header!),
 616          * within command buffer array. */
 617         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 618                                     len, PCI_DMA_TODEVICE);
 619         /* we do not map meta data ... so we can safely access address to
 620          * provide to unmap command*/
 621         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 622         pci_unmap_len_set(out_meta, len, len);
 623
 624         /* Add buffer containing Tx command and MAC(!) header to TFD's
 625          * first entry */
 626         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 627                                                    txcmd_phys, len, 1, 0);
 628
 629
 630         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 631          * if any (802.11 null frames have no payload). */
 632         len = skb->len - hdr_len;
 633         if (len) {
 634                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 635                                            len, PCI_DMA_TODEVICE);
 636                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 637                                                            phys_addr, len,
 638                                                            0, U32_PAD(len));
 639         }
 640
 641
 642         /* Tell device the write index *just past* this latest filled TFD */
 643         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 644         iwl_txq_update_write_ptr(priv, txq);
 645         spin_unlock_irqrestore(&priv->lock, flags);
 646
 647         if ((iwl_queue_space(q) < q->high_mark)
 648             && priv->mac80211_registered) {
 649                 if (wait_write_ptr) {
 650                         spin_lock_irqsave(&priv->lock, flags);
 651                         txq->need_update = 1;
 652                         iwl_txq_update_write_ptr(priv, txq);
 653                         spin_unlock_irqrestore(&priv->lock, flags);
 654                 }
 655
 656                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 657         }
 658
 659         return 0;
 660
 661 drop_unlock:
 662         spin_unlock_irqrestore(&priv->lock, flags);
 663 drop:
 664         return -1;
 665 }
 666
 667 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 668 #define BEACON_TIME_MASK_HIGH   0xFF000000
 669 #define TIME_UNIT               1024
 670
 671 /*
 672  * extended beacon time format
 673  * time in usec will be changed into a 32-bit value in 8:24 format
 674  * the high 1 byte is the beacon counts
 675  * the lower 3 bytes is the time in usec within one beacon interval
 676  */
 677
 678 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 679 {
 680         u32 quot;
 681         u32 rem;
 682         u32 interval = beacon_interval * 1024;
 683
 684         if (!interval || !usec)
 685                 return 0;
 686
 687         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 688         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 689
 690         return (quot << 24) + rem;
 691 }
 692
 693 /* base is usually what we get from ucode with each received frame,
 694  * the same as HW timer counter counting down
 695  */
 696
 697 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 698 {
 699         u32 base_low = base & BEACON_TIME_MASK_LOW;
 700         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 701         u32 interval = beacon_interval * TIME_UNIT;
 702         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 703             (addon & BEACON_TIME_MASK_HIGH);
 704
 705         if (base_low > addon_low)
 706                 res += base_low - addon_low;
 707         else if (base_low < addon_low) {
 708                 res += interval + base_low - addon_low;
 709                 res += (1 << 24);
 710         } else
 711                 res += (1 << 24);
 712
 713         return cpu_to_le32(res);
 714 }
 715
 716 static int iwl3945_get_measurement(struct iwl_priv *priv,
 717                                struct ieee80211_measurement_params *params,
 718                                u8 type)
 719 {
 720         struct iwl_spectrum_cmd spectrum;
 721         struct iwl_rx_packet *pkt;
 722         struct iwl_host_cmd cmd = {
 723                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 724                 .data = (void *)&spectrum,
 725                 .flags = CMD_WANT_SKB,
 726         };
 727         u32 add_time = le64_to_cpu(params->start_time);
 728         int rc;
 729         int spectrum_resp_status;
 730         int duration = le16_to_cpu(params->duration);
 731
 732         if (iwl_is_associated(priv))
 733                 add_time =
 734                     iwl3945_usecs_to_beacons(
 735                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 736                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 737
 738         memset(&spectrum, 0, sizeof(spectrum));
 739
 740         spectrum.channel_count = cpu_to_le16(1);
 741         spectrum.flags =
 742             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 743         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 744         cmd.len = sizeof(spectrum);
 745         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 746
 747         if (iwl_is_associated(priv))
 748                 spectrum.start_time =
 749                     iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
 750                                 add_time,
 751                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 752         else
 753                 spectrum.start_time = 0;
 754
 755         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 756         spectrum.channels[0].channel = params->channel;
 757         spectrum.channels[0].type = type;
 758         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 759                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 760                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 761
 762         rc = iwl_send_cmd_sync(priv, &cmd);
 763         if (rc)
 764                 return rc;
 765
 766         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 767         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 768                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 769                 rc = -EIO;
 770         }
 771
 772         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 773         switch (spectrum_resp_status) {
 774         case 0:         /* Command will be handled */
 775                 if (pkt->u.spectrum.id != 0xff) {
 776                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 777                                                 pkt->u.spectrum.id);
 778                         priv->measurement_status &= ~MEASUREMENT_READY;
 779                 }
 780                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 781                 rc = 0;
 782                 break;
 783
 784         case 1:         /* Command will not be handled */
 785                 rc = -EAGAIN;
 786                 break;
 787         }
 788
 789         iwl_free_pages(priv, cmd.reply_page);
 790
 791         return rc;
 792 }
 793
 794 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 795                                struct iwl_rx_mem_buffer *rxb)
 796 {
 797         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 798         struct iwl_alive_resp *palive;
 799         struct delayed_work *pwork;
 800
 801         palive = &pkt->u.alive_frame;
 802
 803         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 804                        "0x%01X 0x%01X\n",
 805                        palive->is_valid, palive->ver_type,
 806                        palive->ver_subtype);
 807
 808         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 809                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 810                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 811                        sizeof(struct iwl_alive_resp));
 812                 pwork = &priv->init_alive_start;
 813         } else {
 814                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 815                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 816                        sizeof(struct iwl_alive_resp));
 817                 pwork = &priv->alive_start;
 818                 iwl3945_disable_events(priv);
 819         }
 820
 821         /* We delay the ALIVE response by 5ms to
 822          * give the HW RF Kill time to activate... */
 823         if (palive->is_valid == UCODE_VALID_OK)
 824                 queue_delayed_work(priv->workqueue, pwork,
 825                                    msecs_to_jiffies(5));
 826         else
 827                 IWL_WARN(priv, "uCode did not respond OK.\n");
 828 }
 829
 830 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 831                                  struct iwl_rx_mem_buffer *rxb)
 832 {
 833 #ifdef CONFIG_IWLWIFI_DEBUG
 834         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 835 #endif
 836
 837         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 838         return;
 839 }
 840
 841 static void iwl3945_bg_beacon_update(struct work_struct *work)
 842 {
 843         struct iwl_priv *priv =
 844                 container_of(work, struct iwl_priv, beacon_update);
 845         struct sk_buff *beacon;
 846
 847         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 848         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 849
 850         if (!beacon) {
 851                 IWL_ERR(priv, "update beacon failed\n");
 852                 return;
 853         }
 854
 855         mutex_lock(&priv->mutex);
 856         /* new beacon skb is allocated every time; dispose previous.*/
 857         if (priv->ibss_beacon)
 858                 dev_kfree_skb(priv->ibss_beacon);
 859
 860         priv->ibss_beacon = beacon;
 861         mutex_unlock(&priv->mutex);
 862
 863         iwl3945_send_beacon_cmd(priv);
 864 }
 865
 866 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 867                                 struct iwl_rx_mem_buffer *rxb)
 868 {
 869 #ifdef CONFIG_IWLWIFI_DEBUG
 870         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 871         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 872         u8 rate = beacon->beacon_notify_hdr.rate;
 873
 874         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 875                 "tsf %d %d rate %d\n",
 876                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 877                 beacon->beacon_notify_hdr.failure_frame,
 878                 le32_to_cpu(beacon->ibss_mgr_status),
 879                 le32_to_cpu(beacon->high_tsf),
 880                 le32_to_cpu(beacon->low_tsf), rate);
 881 #endif
 882
 883         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 884             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 885                 queue_work(priv->workqueue, &priv->beacon_update);
 886 }
 887
 888 /* Handle notification from uCode that card's power state is changing
 889  * due to software, hardware, or critical temperature RFKILL */
 890 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 891                                     struct iwl_rx_mem_buffer *rxb)
 892 {
 893         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 894         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 895         unsigned long status = priv->status;
 896
 897         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 898                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 899                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 900
 901         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 902                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 903
 904         if (flags & HW_CARD_DISABLED)
 905                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 906         else
 907                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 908
 909
 910         iwl_scan_cancel(priv);
 911
 912         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 913              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 914                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 915                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 916         else
 917                 wake_up_interruptible(&priv->wait_command_queue);
 918 }
 919
 920 /**
 921  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 922  *
 923  * Setup the RX handlers for each of the reply types sent from the uCode
 924  * to the host.
 925  *
 926  * This function chains into the hardware specific files for them to setup
 927  * any hardware specific handlers as well.
 928  */
 929 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 930 {
 931         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 932         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 933         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 934         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 935         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 936                         iwl_rx_spectrum_measure_notif;
 937         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 938         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 939             iwl_rx_pm_debug_statistics_notif;
 940         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 941
 942         /*
 943          * The same handler is used for both the REPLY to a discrete
 944          * statistics request from the host as well as for the periodic
 945          * statistics notifications (after received beacons) from the uCode.
 946          */
 947         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 948         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 949
 950         iwl_setup_rx_scan_handlers(priv);
 951         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 952
 953         /* Set up hardware specific Rx handlers */
 954         iwl3945_hw_rx_handler_setup(priv);
 955 }
 956
 957 /************************** RX-FUNCTIONS ****************************/
 958 /*
 959  * Rx theory of operation
 960  *
 961  * The host allocates 32 DMA target addresses and passes the host address
 962  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 963  * 0 to 31
 964  *
 965  * Rx Queue Indexes
 966  * The host/firmware share two index registers for managing the Rx buffers.
 967  *
 968  * The READ index maps to the first position that the firmware may be writing
 969  * to -- the driver can read up to (but not including) this position and get
 970  * good data.
 971  * The READ index is managed by the firmware once the card is enabled.
 972  *
 973  * The WRITE index maps to the last position the driver has read from -- the
 974  * position preceding WRITE is the last slot the firmware can place a packet.
 975  *
 976  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 977  * WRITE = READ.
 978  *
 979  * During initialization, the host sets up the READ queue position to the first
 980  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 981  *
 982  * When the firmware places a packet in a buffer, it will advance the READ index
 983  * and fire the RX interrupt.  The driver can then query the READ index and
 984  * process as many packets as possible, moving the WRITE index forward as it
 985  * resets the Rx queue buffers with new memory.
 986  *
 987  * The management in the driver is as follows:
 988  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 989  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 990  *   to replenish the iwl->rxq->rx_free.
 991  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 992  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 993  *   'processed' and 'read' driver indexes as well)
 994  * + A received packet is processed and handed to the kernel network stack,
 995  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 996  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 997  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 998  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 999  *   were enough free buffers and RX_STALLED is set it is cleared.
1000  *
1001  *
1002  * Driver sequence:
1003  *
1004  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1005  *                            iwl3945_rx_queue_restock
1006  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1007  *                            queue, updates firmware pointers, and updates
1008  *                            the WRITE index.  If insufficient rx_free buffers
1009  *                            are available, schedules iwl3945_rx_replenish
1010  *
1011  * -- enable interrupts --
1012  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1013  *                            READ INDEX, detaching the SKB from the pool.
1014  *                            Moves the packet buffer from queue to rx_used.
1015  *                            Calls iwl3945_rx_queue_restock to refill any empty
1016  *                            slots.
1017  * ...
1018  *
1019  */
1020
1021 /**
1022  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1023  */
1024 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1025                                           dma_addr_t dma_addr)
1026 {
1027         return cpu_to_le32((u32)dma_addr);
1028 }
1029
1030 /**
1031  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1032  *
1033  * If there are slots in the RX queue that need to be restocked,
1034  * and we have free pre-allocated buffers, fill the ranks as much
1035  * as we can, pulling from rx_free.
1036  *
1037  * This moves the 'write' index forward to catch up with 'processed', and
1038  * also updates the memory address in the firmware to reference the new
1039  * target buffer.
1040  */
1041 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1042 {
1043         struct iwl_rx_queue *rxq = &priv->rxq;
1044         struct list_head *element;
1045         struct iwl_rx_mem_buffer *rxb;
1046         unsigned long flags;
1047         int write;
1048
1049         spin_lock_irqsave(&rxq->lock, flags);
1050         write = rxq->write & ~0x7;
1051         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1052                 /* Get next free Rx buffer, remove from free list */
1053                 element = rxq->rx_free.next;
1054                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1055                 list_del(element);
1056
1057                 /* Point to Rx buffer via next RBD in circular buffer */
1058                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1059                 rxq->queue[rxq->write] = rxb;
1060                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1061                 rxq->free_count--;
1062         }
1063         spin_unlock_irqrestore(&rxq->lock, flags);
1064         /* If the pre-allocated buffer pool is dropping low, schedule to
1065          * refill it */
1066         if (rxq->free_count <= RX_LOW_WATERMARK)
1067                 queue_work(priv->workqueue, &priv->rx_replenish);
1068
1069
1070         /* If we've added more space for the firmware to place data, tell it.
1071          * Increment device's write pointer in multiples of 8. */
1072         if ((rxq->write_actual != (rxq->write & ~0x7))
1073             || (abs(rxq->write - rxq->read) > 7)) {
1074                 spin_lock_irqsave(&rxq->lock, flags);
1075                 rxq->need_update = 1;
1076                 spin_unlock_irqrestore(&rxq->lock, flags);
1077                 iwl_rx_queue_update_write_ptr(priv, rxq);
1078         }
1079 }
1080
1081 /**
1082  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1083  *
1084  * When moving to rx_free an SKB is allocated for the slot.
1085  *
1086  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1087  * This is called as a scheduled work item (except for during initialization)
1088  */
1089 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1090 {
1091         struct iwl_rx_queue *rxq = &priv->rxq;
1092         struct list_head *element;
1093         struct iwl_rx_mem_buffer *rxb;
1094         struct page *page;
1095         unsigned long flags;
1096         gfp_t gfp_mask = priority;
1097
1098         while (1) {
1099                 spin_lock_irqsave(&rxq->lock, flags);
1100
1101                 if (list_empty(&rxq->rx_used)) {
1102                         spin_unlock_irqrestore(&rxq->lock, flags);
1103                         return;
1104                 }
1105                 spin_unlock_irqrestore(&rxq->lock, flags);
1106
1107                 if (rxq->free_count > RX_LOW_WATERMARK)
1108                         gfp_mask |= __GFP_NOWARN;
1109
1110                 if (priv->hw_params.rx_page_order > 0)
1111                         gfp_mask |= __GFP_COMP;
1112
1113                 /* Alloc a new receive buffer */
1114                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1115                 if (!page) {
1116                         if (net_ratelimit())
1117                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1118                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1119                             net_ratelimit())
1120                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1121                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1122                                          rxq->free_count);
1123                         /* We don't reschedule replenish work here -- we will
1124                          * call the restock method and if it still needs
1125                          * more buffers it will schedule replenish */
1126                         break;
1127                 }
1128
1129                 spin_lock_irqsave(&rxq->lock, flags);
1130                 if (list_empty(&rxq->rx_used)) {
1131                         spin_unlock_irqrestore(&rxq->lock, flags);
1132                         __free_pages(page, priv->hw_params.rx_page_order);
1133                         return;
1134                 }
1135                 element = rxq->rx_used.next;
1136                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1137                 list_del(element);
1138                 spin_unlock_irqrestore(&rxq->lock, flags);
1139
1140                 rxb->page = page;
1141                 /* Get physical address of RB/SKB */
1142                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1143                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1144                                 PCI_DMA_FROMDEVICE);
1145
1146                 spin_lock_irqsave(&rxq->lock, flags);
1147
1148                 list_add_tail(&rxb->list, &rxq->rx_free);
1149                 rxq->free_count++;
1150                 priv->alloc_rxb_page++;
1151
1152                 spin_unlock_irqrestore(&rxq->lock, flags);
1153         }
1154 }
1155
1156 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1157 {
1158         unsigned long flags;
1159         int i;
1160         spin_lock_irqsave(&rxq->lock, flags);
1161         INIT_LIST_HEAD(&rxq->rx_free);
1162         INIT_LIST_HEAD(&rxq->rx_used);
1163         /* Fill the rx_used queue with _all_ of the Rx buffers */
1164         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1165                 /* In the reset function, these buffers may have been allocated
1166                  * to an SKB, so we need to unmap and free potential storage */
1167                 if (rxq->pool[i].page != NULL) {
1168                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1169                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1170                                 PCI_DMA_FROMDEVICE);
1171                         __iwl_free_pages(priv, rxq->pool[i].page);
1172                         rxq->pool[i].page = NULL;
1173                 }
1174                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1175         }
1176
1177         /* Set us so that we have processed and used all buffers, but have
1178          * not restocked the Rx queue with fresh buffers */
1179         rxq->read = rxq->write = 0;
1180         rxq->write_actual = 0;
1181         rxq->free_count = 0;
1182         spin_unlock_irqrestore(&rxq->lock, flags);
1183 }
1184
1185 void iwl3945_rx_replenish(void *data)
1186 {
1187         struct iwl_priv *priv = data;
1188         unsigned long flags;
1189
1190         iwl3945_rx_allocate(priv, GFP_KERNEL);
1191
1192         spin_lock_irqsave(&priv->lock, flags);
1193         iwl3945_rx_queue_restock(priv);
1194         spin_unlock_irqrestore(&priv->lock, flags);
1195 }
1196
1197 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1198 {
1199         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1200
1201         iwl3945_rx_queue_restock(priv);
1202 }
1203
1204
1205 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1206  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1207  * This free routine walks the list of POOL entries and if SKB is set to
1208  * non NULL it is unmapped and freed
1209  */
1210 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1211 {
1212         int i;
1213         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1214                 if (rxq->pool[i].page != NULL) {
1215                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1216                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1217                                 PCI_DMA_FROMDEVICE);
1218                         __iwl_free_pages(priv, rxq->pool[i].page);
1219                         rxq->pool[i].page = NULL;
1220                 }
1221         }
1222
1223         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1224                           rxq->dma_addr);
1225         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1226                           rxq->rb_stts, rxq->rb_stts_dma);
1227         rxq->bd = NULL;
1228         rxq->rb_stts  = NULL;
1229 }
1230
1231
1232 /* Convert linear signal-to-noise ratio into dB */
1233 static u8 ratio2dB[100] = {
1234 /*       0   1   2   3   4   5   6   7   8   9 */
1235          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1236         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1237         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1238         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1239         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1240         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1241         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1242         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1243         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1244         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1245 };
1246
1247 /* Calculates a relative dB value from a ratio of linear
1248  *   (i.e. not dB) signal levels.
1249  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1250 int iwl3945_calc_db_from_ratio(int sig_ratio)
1251 {
1252         /* 1000:1 or higher just report as 60 dB */
1253         if (sig_ratio >= 1000)
1254                 return 60;
1255
1256         /* 100:1 or higher, divide by 10 and use table,
1257          *   add 20 dB to make up for divide by 10 */
1258         if (sig_ratio >= 100)
1259                 return 20 + (int)ratio2dB[sig_ratio/10];
1260
1261         /* We shouldn't see this */
1262         if (sig_ratio < 1)
1263                 return 0;
1264
1265         /* Use table for ratios 1:1 - 99:1 */
1266         return (int)ratio2dB[sig_ratio];
1267 }
1268
1269 /**
1270  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1271  *
1272  * Uses the priv->rx_handlers callback function array to invoke
1273  * the appropriate handlers, including command responses,
1274  * frame-received notifications, and other notifications.
1275  */
1276 static void iwl3945_rx_handle(struct iwl_priv *priv)
1277 {
1278         struct iwl_rx_mem_buffer *rxb;
1279         struct iwl_rx_packet *pkt;
1280         struct iwl_rx_queue *rxq = &priv->rxq;
1281         u32 r, i;
1282         int reclaim;
1283         unsigned long flags;
1284         u8 fill_rx = 0;
1285         u32 count = 8;
1286         int total_empty = 0;
1287
1288         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1289          * buffer that the driver may process (last buffer filled by ucode). */
1290         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1291         i = rxq->read;
1292
1293         /* calculate total frames need to be restock after handling RX */
1294         total_empty = r - rxq->write_actual;
1295         if (total_empty < 0)
1296                 total_empty += RX_QUEUE_SIZE;
1297
1298         if (total_empty > (RX_QUEUE_SIZE / 2))
1299                 fill_rx = 1;
1300         /* Rx interrupt, but nothing sent from uCode */
1301         if (i == r)
1302                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1303
1304         while (i != r) {
1305                 rxb = rxq->queue[i];
1306
1307                 /* If an RXB doesn't have a Rx queue slot associated with it,
1308                  * then a bug has been introduced in the queue refilling
1309                  * routines -- catch it here */
1310                 BUG_ON(rxb == NULL);
1311
1312                 rxq->queue[i] = NULL;
1313
1314                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1315                                PAGE_SIZE << priv->hw_params.rx_page_order,
1316                                PCI_DMA_FROMDEVICE);
1317                 pkt = rxb_addr(rxb);
1318
1319                 trace_iwlwifi_dev_rx(priv, pkt,
1320                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1321
1322                 /* Reclaim a command buffer only if this packet is a response
1323                  *   to a (driver-originated) command.
1324                  * If the packet (e.g. Rx frame) originated from uCode,
1325                  *   there is no command buffer to reclaim.
1326                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1327                  *   but apparently a few don't get set; catch them here. */
1328                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1329                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1330                         (pkt->hdr.cmd != REPLY_TX);
1331
1332                 /* Based on type of command response or notification,
1333                  *   handle those that need handling via function in
1334                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1335                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1336                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1337                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1338                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1339                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1340                 } else {
1341                         /* No handling needed */
1342                         IWL_DEBUG_RX(priv,
1343                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1344                                 r, i, get_cmd_string(pkt->hdr.cmd),
1345                                 pkt->hdr.cmd);
1346                 }
1347
1348                 /*
1349                  * XXX: After here, we should always check rxb->page
1350                  * against NULL before touching it or its virtual
1351                  * memory (pkt). Because some rx_handler might have
1352                  * already taken or freed the pages.
1353                  */
1354
1355                 if (reclaim) {
1356                         /* Invoke any callbacks, transfer the buffer to caller,
1357                          * and fire off the (possibly) blocking iwl_send_cmd()
1358                          * as we reclaim the driver command queue */
1359                         if (rxb->page)
1360                                 iwl_tx_cmd_complete(priv, rxb);
1361                         else
1362                                 IWL_WARN(priv, "Claim null rxb?\n");
1363                 }
1364
1365                 /* Reuse the page if possible. For notification packets and
1366                  * SKBs that fail to Rx correctly, add them back into the
1367                  * rx_free list for reuse later. */
1368                 spin_lock_irqsave(&rxq->lock, flags);
1369                 if (rxb->page != NULL) {
1370                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1371                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1372                                 PCI_DMA_FROMDEVICE);
1373                         list_add_tail(&rxb->list, &rxq->rx_free);
1374                         rxq->free_count++;
1375                 } else
1376                         list_add_tail(&rxb->list, &rxq->rx_used);
1377
1378                 spin_unlock_irqrestore(&rxq->lock, flags);
1379
1380                 i = (i + 1) & RX_QUEUE_MASK;
1381                 /* If there are a lot of unused frames,
1382                  * restock the Rx queue so ucode won't assert. */
1383                 if (fill_rx) {
1384                         count++;
1385                         if (count >= 8) {
1386                                 rxq->read = i;
1387                                 iwl3945_rx_replenish_now(priv);
1388                                 count = 0;
1389                         }
1390                 }
1391         }
1392
1393         /* Backtrack one entry */
1394         rxq->read = i;
1395         if (fill_rx)
1396                 iwl3945_rx_replenish_now(priv);
1397         else
1398                 iwl3945_rx_queue_restock(priv);
1399 }
1400
1401 /* call this function to flush any scheduled tasklet */
1402 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1403 {
1404         /* wait to make sure we flush pending tasklet*/
1405         synchronize_irq(priv->pci_dev->irq);
1406         tasklet_kill(&priv->irq_tasklet);
1407 }
1408
1409 static const char *desc_lookup(int i)
1410 {
1411         switch (i) {
1412         case 1:
1413                 return "FAIL";
1414         case 2:
1415                 return "BAD_PARAM";
1416         case 3:
1417                 return "BAD_CHECKSUM";
1418         case 4:
1419                 return "NMI_INTERRUPT";
1420         case 5:
1421                 return "SYSASSERT";
1422         case 6:
1423                 return "FATAL_ERROR";
1424         }
1425
1426         return "UNKNOWN";
1427 }
1428
1429 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1430 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1431
1432 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1433 {
1434         u32 i;
1435         u32 desc, time, count, base, data1;
1436         u32 blink1, blink2, ilink1, ilink2;
1437
1438         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1439
1440         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1441                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1442                 return;
1443         }
1444
1445
1446         count = iwl_read_targ_mem(priv, base);
1447
1448         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1449                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1450                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1451                         priv->status, count);
1452         }
1453
1454         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1455                   "ilink1  nmiPC   Line\n");
1456         for (i = ERROR_START_OFFSET;
1457              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1458              i += ERROR_ELEM_SIZE) {
1459                 desc = iwl_read_targ_mem(priv, base + i);
1460                 time =
1461                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1462                 blink1 =
1463                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1464                 blink2 =
1465                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1466                 ilink1 =
1467                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1468                 ilink2 =
1469                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1470                 data1 =
1471                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1472
1473                 IWL_ERR(priv,
1474                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1475                         desc_lookup(desc), desc, time, blink1, blink2,
1476                         ilink1, ilink2, data1);
1477                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1478                                         0, blink1, blink2, ilink1, ilink2);
1479         }
1480 }
1481
1482 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1483
1484 /**
1485  * iwl3945_print_event_log - Dump error event log to syslog
1486  *
1487  */
1488 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1489                                   u32 num_events, u32 mode,
1490                                   int pos, char **buf, size_t bufsz)
1491 {
1492         u32 i;
1493         u32 base;       /* SRAM byte address of event log header */
1494         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1495         u32 ptr;        /* SRAM byte address of log data */
1496         u32 ev, time, data; /* event log data */
1497         unsigned long reg_flags;
1498
1499         if (num_events == 0)
1500                 return pos;
1501
1502         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1503
1504         if (mode == 0)
1505                 event_size = 2 * sizeof(u32);
1506         else
1507                 event_size = 3 * sizeof(u32);
1508
1509         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1510
1511         /* Make sure device is powered up for SRAM reads */
1512         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1513         iwl_grab_nic_access(priv);
1514
1515         /* Set starting address; reads will auto-increment */
1516         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1517         rmb();
1518
1519         /* "time" is actually "data" for mode 0 (no timestamp).
1520          * place event id # at far right for easier visual parsing. */
1521         for (i = 0; i < num_events; i++) {
1522                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1523                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1524                 if (mode == 0) {
1525                         /* data, ev */
1526                         if (bufsz) {
1527                                 pos += scnprintf(*buf + pos, bufsz - pos,
1528                                                 "0x%08x:%04u\n",
1529                                                 time, ev);
1530                         } else {
1531                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1532                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1533                                                               time, ev);
1534                         }
1535                 } else {
1536                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1537                         if (bufsz) {
1538                                 pos += scnprintf(*buf + pos, bufsz - pos,
1539                                                 "%010u:0x%08x:%04u\n",
1540                                                  time, data, ev);
1541                         } else {
1542                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1543                                         time, data, ev);
1544                                 trace_iwlwifi_dev_ucode_event(priv, time,
1545                                                               data, ev);
1546                         }
1547                 }
1548         }
1549
1550         /* Allow device to power down */
1551         iwl_release_nic_access(priv);
1552         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1553         return pos;
1554 }
1555
1556 /**
1557  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1558  */
1559 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1560                                       u32 num_wraps, u32 next_entry,
1561                                       u32 size, u32 mode,
1562                                       int pos, char **buf, size_t bufsz)
1563 {
1564         /*
1565          * display the newest DEFAULT_LOG_ENTRIES entries
1566          * i.e the entries just before the next ont that uCode would fill.
1567          */
1568         if (num_wraps) {
1569                 if (next_entry < size) {
1570                         pos = iwl3945_print_event_log(priv,
1571                                              capacity - (size - next_entry),
1572                                              size - next_entry, mode,
1573                                              pos, buf, bufsz);
1574                         pos = iwl3945_print_event_log(priv, 0,
1575                                                       next_entry, mode,
1576                                                       pos, buf, bufsz);
1577                 } else
1578                         pos = iwl3945_print_event_log(priv, next_entry - size,
1579                                                       size, mode,
1580                                                       pos, buf, bufsz);
1581         } else {
1582                 if (next_entry < size)
1583                         pos = iwl3945_print_event_log(priv, 0,
1584                                                       next_entry, mode,
1585                                                       pos, buf, bufsz);
1586                 else
1587                         pos = iwl3945_print_event_log(priv, next_entry - size,
1588                                                       size, mode,
1589                                                       pos, buf, bufsz);
1590         }
1591         return pos;
1592 }
1593
1594 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1595
1596 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1597                             char **buf, bool display)
1598 {
1599         u32 base;       /* SRAM byte address of event log header */
1600         u32 capacity;   /* event log capacity in # entries */
1601         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1602         u32 num_wraps;  /* # times uCode wrapped to top of log */
1603         u32 next_entry; /* index of next entry to be written by uCode */
1604         u32 size;       /* # entries that we'll print */
1605         int pos = 0;
1606         size_t bufsz = 0;
1607
1608         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1609         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1610                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1611                 return  -EINVAL;
1612         }
1613
1614         /* event log header */
1615         capacity = iwl_read_targ_mem(priv, base);
1616         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1617         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1618         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1619
1620         if (capacity > priv->cfg->max_event_log_size) {
1621                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1622                         capacity, priv->cfg->max_event_log_size);
1623                 capacity = priv->cfg->max_event_log_size;
1624         }
1625
1626         if (next_entry > priv->cfg->max_event_log_size) {
1627                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1628                         next_entry, priv->cfg->max_event_log_size);
1629                 next_entry = priv->cfg->max_event_log_size;
1630         }
1631
1632         size = num_wraps ? capacity : next_entry;
1633
1634         /* bail out if nothing in log */
1635         if (size == 0) {
1636                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1637                 return pos;
1638         }
1639
1640 #ifdef CONFIG_IWLWIFI_DEBUG
1641         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1642                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1643                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1644 #else
1645         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1646                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1647 #endif
1648
1649         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1650                   size);
1651
1652 #ifdef CONFIG_IWLWIFI_DEBUG
1653         if (display) {
1654                 if (full_log)
1655                         bufsz = capacity * 48;
1656                 else
1657                         bufsz = size * 48;
1658                 *buf = kmalloc(bufsz, GFP_KERNEL);
1659                 if (!*buf)
1660                         return -ENOMEM;
1661         }
1662         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1663                 /* if uCode has wrapped back to top of log,
1664                  * start at the oldest entry,
1665                  * i.e the next one that uCode would fill.
1666                  */
1667                 if (num_wraps)
1668                         pos = iwl3945_print_event_log(priv, next_entry,
1669                                                 capacity - next_entry, mode,
1670                                                 pos, buf, bufsz);
1671
1672                 /* (then/else) start at top of log */
1673                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1674                                               pos, buf, bufsz);
1675         } else
1676                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1677                                                     next_entry, size, mode,
1678                                                     pos, buf, bufsz);
1679 #else
1680         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1681                                             next_entry, size, mode,
1682                                             pos, buf, bufsz);
1683 #endif
1684         return pos;
1685 }
1686
1687 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1688 {
1689         u32 inta, handled = 0;
1690         u32 inta_fh;
1691         unsigned long flags;
1692 #ifdef CONFIG_IWLWIFI_DEBUG
1693         u32 inta_mask;
1694 #endif
1695
1696         spin_lock_irqsave(&priv->lock, flags);
1697
1698         /* Ack/clear/reset pending uCode interrupts.
1699          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1700          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1701         inta = iwl_read32(priv, CSR_INT);
1702         iwl_write32(priv, CSR_INT, inta);
1703
1704         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1705          * Any new interrupts that happen after this, either while we're
1706          * in this tasklet, or later, will show up in next ISR/tasklet. */
1707         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1708         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1709
1710 #ifdef CONFIG_IWLWIFI_DEBUG
1711         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1712                 /* just for debug */
1713                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1714                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1715                               inta, inta_mask, inta_fh);
1716         }
1717 #endif
1718
1719         spin_unlock_irqrestore(&priv->lock, flags);
1720
1721         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1722          * atomic, make sure that inta covers all the interrupts that
1723          * we've discovered, even if FH interrupt came in just after
1724          * reading CSR_INT. */
1725         if (inta_fh & CSR39_FH_INT_RX_MASK)
1726                 inta |= CSR_INT_BIT_FH_RX;
1727         if (inta_fh & CSR39_FH_INT_TX_MASK)
1728                 inta |= CSR_INT_BIT_FH_TX;
1729
1730         /* Now service all interrupt bits discovered above. */
1731         if (inta & CSR_INT_BIT_HW_ERR) {
1732                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1733
1734                 /* Tell the device to stop sending interrupts */
1735                 iwl_disable_interrupts(priv);
1736
1737                 priv->isr_stats.hw++;
1738                 iwl_irq_handle_error(priv);
1739
1740                 handled |= CSR_INT_BIT_HW_ERR;
1741
1742                 return;
1743         }
1744
1745 #ifdef CONFIG_IWLWIFI_DEBUG
1746         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1747                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1748                 if (inta & CSR_INT_BIT_SCD) {
1749                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1750                                       "the frame/frames.\n");
1751                         priv->isr_stats.sch++;
1752                 }
1753
1754                 /* Alive notification via Rx interrupt will do the real work */
1755                 if (inta & CSR_INT_BIT_ALIVE) {
1756                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1757                         priv->isr_stats.alive++;
1758                 }
1759         }
1760 #endif
1761         /* Safely ignore these bits for debug checks below */
1762         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1763
1764         /* Error detected by uCode */
1765         if (inta & CSR_INT_BIT_SW_ERR) {
1766                 IWL_ERR(priv, "Microcode SW error detected. "
1767                         "Restarting 0x%X.\n", inta);
1768                 priv->isr_stats.sw++;
1769                 priv->isr_stats.sw_err = inta;
1770                 iwl_irq_handle_error(priv);
1771                 handled |= CSR_INT_BIT_SW_ERR;
1772         }
1773
1774         /* uCode wakes up after power-down sleep */
1775         if (inta & CSR_INT_BIT_WAKEUP) {
1776                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1777                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1778                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1779                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1780                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1781                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1782                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1783                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1784
1785                 priv->isr_stats.wakeup++;
1786                 handled |= CSR_INT_BIT_WAKEUP;
1787         }
1788
1789         /* All uCode command responses, including Tx command responses,
1790          * Rx "responses" (frame-received notification), and other
1791          * notifications from uCode come through here*/
1792         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1793                 iwl3945_rx_handle(priv);
1794                 priv->isr_stats.rx++;
1795                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1796         }
1797
1798         if (inta & CSR_INT_BIT_FH_TX) {
1799                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1800                 priv->isr_stats.tx++;
1801
1802                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1803                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1804                                         (FH39_SRVC_CHNL), 0x0);
1805                 handled |= CSR_INT_BIT_FH_TX;
1806         }
1807
1808         if (inta & ~handled) {
1809                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1810                 priv->isr_stats.unhandled++;
1811         }
1812
1813         if (inta & ~priv->inta_mask) {
1814                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1815                          inta & ~priv->inta_mask);
1816                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1817         }
1818
1819         /* Re-enable all interrupts */
1820         /* only Re-enable if disabled by irq */
1821         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1822                 iwl_enable_interrupts(priv);
1823
1824 #ifdef CONFIG_IWLWIFI_DEBUG
1825         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1826                 inta = iwl_read32(priv, CSR_INT);
1827                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1828                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1829                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1830                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1831         }
1832 #endif
1833 }
1834
1835 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1836                                          enum ieee80211_band band,
1837                                      u8 is_active, u8 n_probes,
1838                                      struct iwl3945_scan_channel *scan_ch,
1839                                      struct ieee80211_vif *vif)
1840 {
1841         struct ieee80211_channel *chan;
1842         const struct ieee80211_supported_band *sband;
1843         const struct iwl_channel_info *ch_info;
1844         u16 passive_dwell = 0;
1845         u16 active_dwell = 0;
1846         int added, i;
1847
1848         sband = iwl_get_hw_mode(priv, band);
1849         if (!sband)
1850                 return 0;
1851
1852         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1853         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1854
1855         if (passive_dwell <= active_dwell)
1856                 passive_dwell = active_dwell + 1;
1857
1858         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1859                 chan = priv->scan_request->channels[i];
1860
1861                 if (chan->band != band)
1862                         continue;
1863
1864                 scan_ch->channel = chan->hw_value;
1865
1866                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1867                 if (!is_channel_valid(ch_info)) {
1868                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1869                                        scan_ch->channel);
1870                         continue;
1871                 }
1872
1873                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1874                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1875                 /* If passive , set up for auto-switch
1876                  *  and use long active_dwell time.
1877                  */
1878                 if (!is_active || is_channel_passive(ch_info) ||
1879                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1880                         scan_ch->type = 0;      /* passive */
1881                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1882                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1883                 } else {
1884                         scan_ch->type = 1;      /* active */
1885                 }
1886
1887                 /* Set direct probe bits. These may be used both for active
1888                  * scan channels (probes gets sent right away),
1889                  * or for passive channels (probes get se sent only after
1890                  * hearing clear Rx packet).*/
1891                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1892                         if (n_probes)
1893                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1894                 } else {
1895                         /* uCode v1 does not allow setting direct probe bits on
1896                          * passive channel. */
1897                         if ((scan_ch->type & 1) && n_probes)
1898                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1899                 }
1900
1901                 /* Set txpower levels to defaults */
1902                 scan_ch->tpc.dsp_atten = 110;
1903                 /* scan_pwr_info->tpc.dsp_atten; */
1904
1905                 /*scan_pwr_info->tpc.tx_gain; */
1906                 if (band == IEEE80211_BAND_5GHZ)
1907                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1908                 else {
1909                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1910                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1911                          * power level:
1912                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1913                          */
1914                 }
1915
1916                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1917                                scan_ch->channel,
1918                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1919                                (scan_ch->type & 1) ?
1920                                active_dwell : passive_dwell);
1921
1922                 scan_ch++;
1923                 added++;
1924         }
1925
1926         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1927         return added;
1928 }
1929
1930 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1931                               struct ieee80211_rate *rates)
1932 {
1933         int i;
1934
1935         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1936                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1937                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1938                 rates[i].hw_value_short = i;
1939                 rates[i].flags = 0;
1940                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1941                         /*
1942                          * If CCK != 1M then set short preamble rate flag.
1943                          */
1944                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1945                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1946                 }
1947         }
1948 }
1949
1950 /******************************************************************************
1951  *
1952  * uCode download functions
1953  *
1954  ******************************************************************************/
1955
1956 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1957 {
1958         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1959         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1960         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1961         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1962         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1963         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1964 }
1965
1966 /**
1967  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1968  *     looking at all data.
1969  */
1970 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1971 {
1972         u32 val;
1973         u32 save_len = len;
1974         int rc = 0;
1975         u32 errcnt;
1976
1977         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1978
1979         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1980                                IWL39_RTC_INST_LOWER_BOUND);
1981
1982         errcnt = 0;
1983         for (; len > 0; len -= sizeof(u32), image++) {
1984                 /* read data comes through single port, auto-incr addr */
1985                 /* NOTE: Use the debugless read so we don't flood kernel log
1986                  * if IWL_DL_IO is set */
1987                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1988                 if (val != le32_to_cpu(*image)) {
1989                         IWL_ERR(priv, "uCode INST section is invalid at "
1990                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1991                                   save_len - len, val, le32_to_cpu(*image));
1992                         rc = -EIO;
1993                         errcnt++;
1994                         if (errcnt >= 20)
1995                                 break;
1996                 }
1997         }
1998
1999
2000         if (!errcnt)
2001                 IWL_DEBUG_INFO(priv,
2002                         "ucode image in INSTRUCTION memory is good\n");
2003
2004         return rc;
2005 }
2006
2007
2008 /**
2009  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2010  *   using sample data 100 bytes apart.  If these sample points are good,
2011  *   it's a pretty good bet that everything between them is good, too.
2012  */
2013 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2014 {
2015         u32 val;
2016         int rc = 0;
2017         u32 errcnt = 0;
2018         u32 i;
2019
2020         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2021
2022         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2023                 /* read data comes through single port, auto-incr addr */
2024                 /* NOTE: Use the debugless read so we don't flood kernel log
2025                  * if IWL_DL_IO is set */
2026                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2027                         i + IWL39_RTC_INST_LOWER_BOUND);
2028                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2029                 if (val != le32_to_cpu(*image)) {
2030 #if 0 /* Enable this if you want to see details */
2031                         IWL_ERR(priv, "uCode INST section is invalid at "
2032                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2033                                   i, val, *image);
2034 #endif
2035                         rc = -EIO;
2036                         errcnt++;
2037                         if (errcnt >= 3)
2038                                 break;
2039                 }
2040         }
2041
2042         return rc;
2043 }
2044
2045
2046 /**
2047  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2048  *    and verify its contents
2049  */
2050 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2051 {
2052         __le32 *image;
2053         u32 len;
2054         int rc = 0;
2055
2056         /* Try bootstrap */
2057         image = (__le32 *)priv->ucode_boot.v_addr;
2058         len = priv->ucode_boot.len;
2059         rc = iwl3945_verify_inst_sparse(priv, image, len);
2060         if (rc == 0) {
2061                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2062                 return 0;
2063         }
2064
2065         /* Try initialize */
2066         image = (__le32 *)priv->ucode_init.v_addr;
2067         len = priv->ucode_init.len;
2068         rc = iwl3945_verify_inst_sparse(priv, image, len);
2069         if (rc == 0) {
2070                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2071                 return 0;
2072         }
2073
2074         /* Try runtime/protocol */
2075         image = (__le32 *)priv->ucode_code.v_addr;
2076         len = priv->ucode_code.len;
2077         rc = iwl3945_verify_inst_sparse(priv, image, len);
2078         if (rc == 0) {
2079                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2080                 return 0;
2081         }
2082
2083         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2084
2085         /* Since nothing seems to match, show first several data entries in
2086          * instruction SRAM, so maybe visual inspection will give a clue.
2087          * Selection of bootstrap image (vs. other images) is arbitrary. */
2088         image = (__le32 *)priv->ucode_boot.v_addr;
2089         len = priv->ucode_boot.len;
2090         rc = iwl3945_verify_inst_full(priv, image, len);
2091
2092         return rc;
2093 }
2094
2095 static void iwl3945_nic_start(struct iwl_priv *priv)
2096 {
2097         /* Remove all resets to allow NIC to operate */
2098         iwl_write32(priv, CSR_RESET, 0);
2099 }
2100
2101 #define IWL3945_UCODE_GET(item)                                         \
2102 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2103 {                                                                       \
2104         return le32_to_cpu(ucode->u.v1.item);                           \
2105 }
2106
2107 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2108 {
2109         return 24;
2110 }
2111
2112 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2113 {
2114         return (u8 *) ucode->u.v1.data;
2115 }
2116
2117 IWL3945_UCODE_GET(inst_size);
2118 IWL3945_UCODE_GET(data_size);
2119 IWL3945_UCODE_GET(init_size);
2120 IWL3945_UCODE_GET(init_data_size);
2121 IWL3945_UCODE_GET(boot_size);
2122
2123 /**
2124  * iwl3945_read_ucode - Read uCode images from disk file.
2125  *
2126  * Copy into buffers for card to fetch via bus-mastering
2127  */
2128 static int iwl3945_read_ucode(struct iwl_priv *priv)
2129 {
2130         const struct iwl_ucode_header *ucode;
2131         int ret = -EINVAL, index;
2132         const struct firmware *ucode_raw;
2133         /* firmware file name contains uCode/driver compatibility version */
2134         const char *name_pre = priv->cfg->fw_name_pre;
2135         const unsigned int api_max = priv->cfg->ucode_api_max;
2136         const unsigned int api_min = priv->cfg->ucode_api_min;
2137         char buf[25];
2138         u8 *src;
2139         size_t len;
2140         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2141
2142         /* Ask kernel firmware_class module to get the boot firmware off disk.
2143          * request_firmware() is synchronous, file is in memory on return. */
2144         for (index = api_max; index >= api_min; index--) {
2145                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2146                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2147                 if (ret < 0) {
2148                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2149                                   buf, ret);
2150                         if (ret == -ENOENT)
2151                                 continue;
2152                         else
2153                                 goto error;
2154                 } else {
2155                         if (index < api_max)
2156                                 IWL_ERR(priv, "Loaded firmware %s, "
2157                                         "which is deprecated. "
2158                                         " Please use API v%u instead.\n",
2159                                           buf, api_max);
2160                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2161                                        "(%zd bytes) from disk\n",
2162                                        buf, ucode_raw->size);
2163                         break;
2164                 }
2165         }
2166
2167         if (ret < 0)
2168                 goto error;
2169
2170         /* Make sure that we got at least our header! */
2171         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2172                 IWL_ERR(priv, "File size way too small!\n");
2173                 ret = -EINVAL;
2174                 goto err_release;
2175         }
2176
2177         /* Data from ucode file:  header followed by uCode images */
2178         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2179
2180         priv->ucode_ver = le32_to_cpu(ucode->ver);
2181         api_ver = IWL_UCODE_API(priv->ucode_ver);
2182         inst_size = iwl3945_ucode_get_inst_size(ucode);
2183         data_size = iwl3945_ucode_get_data_size(ucode);
2184         init_size = iwl3945_ucode_get_init_size(ucode);
2185         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2186         boot_size = iwl3945_ucode_get_boot_size(ucode);
2187         src = iwl3945_ucode_get_data(ucode);
2188
2189         /* api_ver should match the api version forming part of the
2190          * firmware filename ... but we don't check for that and only rely
2191          * on the API version read from firmware header from here on forward */
2192
2193         if (api_ver < api_min || api_ver > api_max) {
2194                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2195                           "Driver supports v%u, firmware is v%u.\n",
2196                           api_max, api_ver);
2197                 priv->ucode_ver = 0;
2198                 ret = -EINVAL;
2199                 goto err_release;
2200         }
2201         if (api_ver != api_max)
2202                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2203                           "got %u. New firmware can be obtained "
2204                           "from http://www.intellinuxwireless.org.\n",
2205                           api_max, api_ver);
2206
2207         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2208                 IWL_UCODE_MAJOR(priv->ucode_ver),
2209                 IWL_UCODE_MINOR(priv->ucode_ver),
2210                 IWL_UCODE_API(priv->ucode_ver),
2211                 IWL_UCODE_SERIAL(priv->ucode_ver));
2212
2213         snprintf(priv->hw->wiphy->fw_version,
2214                  sizeof(priv->hw->wiphy->fw_version),
2215                  "%u.%u.%u.%u",
2216                  IWL_UCODE_MAJOR(priv->ucode_ver),
2217                  IWL_UCODE_MINOR(priv->ucode_ver),
2218                  IWL_UCODE_API(priv->ucode_ver),
2219                  IWL_UCODE_SERIAL(priv->ucode_ver));
2220
2221         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2222                        priv->ucode_ver);
2223         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2224                        inst_size);
2225         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2226                        data_size);
2227         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2228                        init_size);
2229         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2230                        init_data_size);
2231         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2232                        boot_size);
2233
2234
2235         /* Verify size of file vs. image size info in file's header */
2236         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2237                 inst_size + data_size + init_size +
2238                 init_data_size + boot_size) {
2239
2240                 IWL_DEBUG_INFO(priv,
2241                         "uCode file size %zd does not match expected size\n",
2242                         ucode_raw->size);
2243                 ret = -EINVAL;
2244                 goto err_release;
2245         }
2246
2247         /* Verify that uCode images will fit in card's SRAM */
2248         if (inst_size > IWL39_MAX_INST_SIZE) {
2249                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2250                                inst_size);
2251                 ret = -EINVAL;
2252                 goto err_release;
2253         }
2254
2255         if (data_size > IWL39_MAX_DATA_SIZE) {
2256                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2257                                data_size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261         if (init_size > IWL39_MAX_INST_SIZE) {
2262                 IWL_DEBUG_INFO(priv,
2263                                 "uCode init instr len %d too large to fit in\n",
2264                                 init_size);
2265                 ret = -EINVAL;
2266                 goto err_release;
2267         }
2268         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2269                 IWL_DEBUG_INFO(priv,
2270                                 "uCode init data len %d too large to fit in\n",
2271                                 init_data_size);
2272                 ret = -EINVAL;
2273                 goto err_release;
2274         }
2275         if (boot_size > IWL39_MAX_BSM_SIZE) {
2276                 IWL_DEBUG_INFO(priv,
2277                                 "uCode boot instr len %d too large to fit in\n",
2278                                 boot_size);
2279                 ret = -EINVAL;
2280                 goto err_release;
2281         }
2282
2283         /* Allocate ucode buffers for card's bus-master loading ... */
2284
2285         /* Runtime instructions and 2 copies of data:
2286          * 1) unmodified from disk
2287          * 2) backup cache for save/restore during power-downs */
2288         priv->ucode_code.len = inst_size;
2289         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2290
2291         priv->ucode_data.len = data_size;
2292         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2293
2294         priv->ucode_data_backup.len = data_size;
2295         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2296
2297         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2298             !priv->ucode_data_backup.v_addr)
2299                 goto err_pci_alloc;
2300
2301         /* Initialization instructions and data */
2302         if (init_size && init_data_size) {
2303                 priv->ucode_init.len = init_size;
2304                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2305
2306                 priv->ucode_init_data.len = init_data_size;
2307                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2308
2309                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2310                         goto err_pci_alloc;
2311         }
2312
2313         /* Bootstrap (instructions only, no data) */
2314         if (boot_size) {
2315                 priv->ucode_boot.len = boot_size;
2316                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2317
2318                 if (!priv->ucode_boot.v_addr)
2319                         goto err_pci_alloc;
2320         }
2321
2322         /* Copy images into buffers for card's bus-master reads ... */
2323
2324         /* Runtime instructions (first block of data in file) */
2325         len = inst_size;
2326         IWL_DEBUG_INFO(priv,
2327                 "Copying (but not loading) uCode instr len %zd\n", len);
2328         memcpy(priv->ucode_code.v_addr, src, len);
2329         src += len;
2330
2331         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2332                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2333
2334         /* Runtime data (2nd block)
2335          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2336         len = data_size;
2337         IWL_DEBUG_INFO(priv,
2338                 "Copying (but not loading) uCode data len %zd\n", len);
2339         memcpy(priv->ucode_data.v_addr, src, len);
2340         memcpy(priv->ucode_data_backup.v_addr, src, len);
2341         src += len;
2342
2343         /* Initialization instructions (3rd block) */
2344         if (init_size) {
2345                 len = init_size;
2346                 IWL_DEBUG_INFO(priv,
2347                         "Copying (but not loading) init instr len %zd\n", len);
2348                 memcpy(priv->ucode_init.v_addr, src, len);
2349                 src += len;
2350         }
2351
2352         /* Initialization data (4th block) */
2353         if (init_data_size) {
2354                 len = init_data_size;
2355                 IWL_DEBUG_INFO(priv,
2356                         "Copying (but not loading) init data len %zd\n", len);
2357                 memcpy(priv->ucode_init_data.v_addr, src, len);
2358                 src += len;
2359         }
2360
2361         /* Bootstrap instructions (5th block) */
2362         len = boot_size;
2363         IWL_DEBUG_INFO(priv,
2364                 "Copying (but not loading) boot instr len %zd\n", len);
2365         memcpy(priv->ucode_boot.v_addr, src, len);
2366
2367         /* We have our copies now, allow OS release its copies */
2368         release_firmware(ucode_raw);
2369         return 0;
2370
2371  err_pci_alloc:
2372         IWL_ERR(priv, "failed to allocate pci memory\n");
2373         ret = -ENOMEM;
2374         iwl3945_dealloc_ucode_pci(priv);
2375
2376  err_release:
2377         release_firmware(ucode_raw);
2378
2379  error:
2380         return ret;
2381 }
2382
2383
2384 /**
2385  * iwl3945_set_ucode_ptrs - Set uCode address location
2386  *
2387  * Tell initialization uCode where to find runtime uCode.
2388  *
2389  * BSM registers initially contain pointers to initialization uCode.
2390  * We need to replace them to load runtime uCode inst and data,
2391  * and to save runtime data when powering down.
2392  */
2393 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2394 {
2395         dma_addr_t pinst;
2396         dma_addr_t pdata;
2397
2398         /* bits 31:0 for 3945 */
2399         pinst = priv->ucode_code.p_addr;
2400         pdata = priv->ucode_data_backup.p_addr;
2401
2402         /* Tell bootstrap uCode where to find image to load */
2403         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2404         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2405         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2406                                  priv->ucode_data.len);
2407
2408         /* Inst byte count must be last to set up, bit 31 signals uCode
2409          *   that all new ptr/size info is in place */
2410         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2411                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2412
2413         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2414
2415         return 0;
2416 }
2417
2418 /**
2419  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2420  *
2421  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2422  *
2423  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2424  */
2425 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2426 {
2427         /* Check alive response for "valid" sign from uCode */
2428         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2429                 /* We had an error bringing up the hardware, so take it
2430                  * all the way back down so we can try again */
2431                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2432                 goto restart;
2433         }
2434
2435         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2436          * This is a paranoid check, because we would not have gotten the
2437          * "initialize" alive if code weren't properly loaded.  */
2438         if (iwl3945_verify_ucode(priv)) {
2439                 /* Runtime instruction load was bad;
2440                  * take it all the way back down so we can try again */
2441                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2442                 goto restart;
2443         }
2444
2445         /* Send pointers to protocol/runtime uCode image ... init code will
2446          * load and launch runtime uCode, which will send us another "Alive"
2447          * notification. */
2448         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2449         if (iwl3945_set_ucode_ptrs(priv)) {
2450                 /* Runtime instruction load won't happen;
2451                  * take it all the way back down so we can try again */
2452                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2453                 goto restart;
2454         }
2455         return;
2456
2457  restart:
2458         queue_work(priv->workqueue, &priv->restart);
2459 }
2460
2461 /**
2462  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2463  *                   from protocol/runtime uCode (initialization uCode's
2464  *                   Alive gets handled by iwl3945_init_alive_start()).
2465  */
2466 static void iwl3945_alive_start(struct iwl_priv *priv)
2467 {
2468         int thermal_spin = 0;
2469         u32 rfkill;
2470
2471         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2472
2473         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2474                 /* We had an error bringing up the hardware, so take it
2475                  * all the way back down so we can try again */
2476                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2477                 goto restart;
2478         }
2479
2480         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2481          * This is a paranoid check, because we would not have gotten the
2482          * "runtime" alive if code weren't properly loaded.  */
2483         if (iwl3945_verify_ucode(priv)) {
2484                 /* Runtime instruction load was bad;
2485                  * take it all the way back down so we can try again */
2486                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2487                 goto restart;
2488         }
2489
2490         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2491         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2492
2493         if (rfkill & 0x1) {
2494                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2495                 /* if RFKILL is not on, then wait for thermal
2496                  * sensor in adapter to kick in */
2497                 while (iwl3945_hw_get_temperature(priv) == 0) {
2498                         thermal_spin++;
2499                         udelay(10);
2500                 }
2501
2502                 if (thermal_spin)
2503                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2504                                        thermal_spin * 10);
2505         } else
2506                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2507
2508         /* After the ALIVE response, we can send commands to 3945 uCode */
2509         set_bit(STATUS_ALIVE, &priv->status);
2510
2511         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2512                 /* Enable timer to monitor the driver queues */
2513                 mod_timer(&priv->monitor_recover,
2514                         jiffies +
2515                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2516         }
2517
2518         if (iwl_is_rfkill(priv))
2519                 return;
2520
2521         ieee80211_wake_queues(priv->hw);
2522
2523         priv->active_rate = IWL_RATES_MASK;
2524
2525         iwl_power_update_mode(priv, true);
2526
2527         if (iwl_is_associated(priv)) {
2528                 struct iwl3945_rxon_cmd *active_rxon =
2529                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2530
2531                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2532                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2533         } else {
2534                 /* Initialize our rx_config data */
2535                 iwl_connection_init_rx_config(priv, NULL);
2536         }
2537
2538         /* Configure Bluetooth device coexistence support */
2539         priv->cfg->ops->hcmd->send_bt_config(priv);
2540
2541         /* Configure the adapter for unassociated operation */
2542         iwlcore_commit_rxon(priv);
2543
2544         iwl3945_reg_txpower_periodic(priv);
2545
2546         iwl_leds_init(priv);
2547
2548         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2549         set_bit(STATUS_READY, &priv->status);
2550         wake_up_interruptible(&priv->wait_command_queue);
2551
2552         return;
2553
2554  restart:
2555         queue_work(priv->workqueue, &priv->restart);
2556 }
2557
2558 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2559
2560 static void __iwl3945_down(struct iwl_priv *priv)
2561 {
2562         unsigned long flags;
2563         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2564         struct ieee80211_conf *conf = NULL;
2565
2566         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2567
2568         conf = ieee80211_get_hw_conf(priv->hw);
2569
2570         if (!exit_pending)
2571                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2572
2573         /* Station information will now be cleared in device */
2574         iwl_clear_ucode_stations(priv);
2575         iwl_dealloc_bcast_station(priv);
2576         iwl_clear_driver_stations(priv);
2577
2578         /* Unblock any waiting calls */
2579         wake_up_interruptible_all(&priv->wait_command_queue);
2580
2581         /* Wipe out the EXIT_PENDING status bit if we are not actually
2582          * exiting the module */
2583         if (!exit_pending)
2584                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2585
2586         /* stop and reset the on-board processor */
2587         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2588
2589         /* tell the device to stop sending interrupts */
2590         spin_lock_irqsave(&priv->lock, flags);
2591         iwl_disable_interrupts(priv);
2592         spin_unlock_irqrestore(&priv->lock, flags);
2593         iwl_synchronize_irq(priv);
2594
2595         if (priv->mac80211_registered)
2596                 ieee80211_stop_queues(priv->hw);
2597
2598         /* If we have not previously called iwl3945_init() then
2599          * clear all bits but the RF Kill bits and return */
2600         if (!iwl_is_init(priv)) {
2601                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2602                                         STATUS_RF_KILL_HW |
2603                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2604                                         STATUS_GEO_CONFIGURED |
2605                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2606                                         STATUS_EXIT_PENDING;
2607                 goto exit;
2608         }
2609
2610         /* ...otherwise clear out all the status bits but the RF Kill
2611          * bit and continue taking the NIC down. */
2612         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2613                                 STATUS_RF_KILL_HW |
2614                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2615                                 STATUS_GEO_CONFIGURED |
2616                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2617                                 STATUS_FW_ERROR |
2618                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2619                                 STATUS_EXIT_PENDING;
2620
2621         iwl3945_hw_txq_ctx_stop(priv);
2622         iwl3945_hw_rxq_stop(priv);
2623
2624         /* Power-down device's busmaster DMA clocks */
2625         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2626         udelay(5);
2627
2628         /* Stop the device, and put it in low power state */
2629         priv->cfg->ops->lib->apm_ops.stop(priv);
2630
2631  exit:
2632         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2633
2634         if (priv->ibss_beacon)
2635                 dev_kfree_skb(priv->ibss_beacon);
2636         priv->ibss_beacon = NULL;
2637
2638         /* clear out any free frames */
2639         iwl3945_clear_free_frames(priv);
2640 }
2641
2642 static void iwl3945_down(struct iwl_priv *priv)
2643 {
2644         mutex_lock(&priv->mutex);
2645         __iwl3945_down(priv);
2646         mutex_unlock(&priv->mutex);
2647
2648         iwl3945_cancel_deferred_work(priv);
2649 }
2650
2651 #define MAX_HW_RESTARTS 5
2652
2653 static int __iwl3945_up(struct iwl_priv *priv)
2654 {
2655         int rc, i;
2656
2657         rc = iwl_alloc_bcast_station(priv, false);
2658         if (rc)
2659                 return rc;
2660
2661         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2662                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2663                 return -EIO;
2664         }
2665
2666         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2667                 IWL_ERR(priv, "ucode not available for device bring up\n");
2668                 return -EIO;
2669         }
2670
2671         /* If platform's RF_KILL switch is NOT set to KILL */
2672         if (iwl_read32(priv, CSR_GP_CNTRL) &
2673                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2674                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2675         else {
2676                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2677                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2678                 return -ENODEV;
2679         }
2680
2681         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2682
2683         rc = iwl3945_hw_nic_init(priv);
2684         if (rc) {
2685                 IWL_ERR(priv, "Unable to int nic\n");
2686                 return rc;
2687         }
2688
2689         /* make sure rfkill handshake bits are cleared */
2690         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2691         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2692                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2693
2694         /* clear (again), then enable host interrupts */
2695         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2696         iwl_enable_interrupts(priv);
2697
2698         /* really make sure rfkill handshake bits are cleared */
2699         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2700         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2701
2702         /* Copy original ucode data image from disk into backup cache.
2703          * This will be used to initialize the on-board processor's
2704          * data SRAM for a clean start when the runtime program first loads. */
2705         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2706                priv->ucode_data.len);
2707
2708         /* We return success when we resume from suspend and rf_kill is on. */
2709         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2710                 return 0;
2711
2712         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2713
2714                 /* load bootstrap state machine,
2715                  * load bootstrap program into processor's memory,
2716                  * prepare to load the "initialize" uCode */
2717                 rc = priv->cfg->ops->lib->load_ucode(priv);
2718
2719                 if (rc) {
2720                         IWL_ERR(priv,
2721                                 "Unable to set up bootstrap uCode: %d\n", rc);
2722                         continue;
2723                 }
2724
2725                 /* start card; "initialize" will load runtime ucode */
2726                 iwl3945_nic_start(priv);
2727
2728                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2729
2730                 return 0;
2731         }
2732
2733         set_bit(STATUS_EXIT_PENDING, &priv->status);
2734         __iwl3945_down(priv);
2735         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2736
2737         /* tried to restart and config the device for as long as our
2738          * patience could withstand */
2739         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2740         return -EIO;
2741 }
2742
2743
2744 /*****************************************************************************
2745  *
2746  * Workqueue callbacks
2747  *
2748  *****************************************************************************/
2749
2750 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2751 {
2752         struct iwl_priv *priv =
2753             container_of(data, struct iwl_priv, init_alive_start.work);
2754
2755         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2756                 return;
2757
2758         mutex_lock(&priv->mutex);
2759         iwl3945_init_alive_start(priv);
2760         mutex_unlock(&priv->mutex);
2761 }
2762
2763 static void iwl3945_bg_alive_start(struct work_struct *data)
2764 {
2765         struct iwl_priv *priv =
2766             container_of(data, struct iwl_priv, alive_start.work);
2767
2768         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2769                 return;
2770
2771         mutex_lock(&priv->mutex);
2772         iwl3945_alive_start(priv);
2773         mutex_unlock(&priv->mutex);
2774 }
2775
2776 /*
2777  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2778  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2779  * *is* readable even when device has been SW_RESET into low power mode
2780  * (e.g. during RF KILL).
2781  */
2782 static void iwl3945_rfkill_poll(struct work_struct *data)
2783 {
2784         struct iwl_priv *priv =
2785             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2786         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2787         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2788                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2789
2790         if (new_rfkill != old_rfkill) {
2791                 if (new_rfkill)
2792                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2793                 else
2794                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2795
2796                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2797
2798                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2799                                 new_rfkill ? "disable radio" : "enable radio");
2800         }
2801
2802         /* Keep this running, even if radio now enabled.  This will be
2803          * cancelled in mac_start() if system decides to start again */
2804         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2805                            round_jiffies_relative(2 * HZ));
2806
2807 }
2808
2809 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2810 {
2811         struct iwl_host_cmd cmd = {
2812                 .id = REPLY_SCAN_CMD,
2813                 .len = sizeof(struct iwl3945_scan_cmd),
2814                 .flags = CMD_SIZE_HUGE,
2815         };
2816         struct iwl3945_scan_cmd *scan;
2817         struct ieee80211_conf *conf = NULL;
2818         u8 n_probes = 0;
2819         enum ieee80211_band band;
2820         bool is_active = false;
2821
2822         conf = ieee80211_get_hw_conf(priv->hw);
2823
2824         cancel_delayed_work(&priv->scan_check);
2825
2826         if (!iwl_is_ready(priv)) {
2827                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2828                 goto done;
2829         }
2830
2831         /* Make sure the scan wasn't canceled before this queued work
2832          * was given the chance to run... */
2833         if (!test_bit(STATUS_SCANNING, &priv->status))
2834                 goto done;
2835
2836         /* This should never be called or scheduled if there is currently
2837          * a scan active in the hardware. */
2838         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2839                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2840                                 "Ignoring second request.\n");
2841                 goto done;
2842         }
2843
2844         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2845                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2846                 goto done;
2847         }
2848
2849         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2850                 IWL_DEBUG_HC(priv,
2851                         "Scan request while abort pending. Queuing.\n");
2852                 goto done;
2853         }
2854
2855         if (iwl_is_rfkill(priv)) {
2856                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2857                 goto done;
2858         }
2859
2860         if (!test_bit(STATUS_READY, &priv->status)) {
2861                 IWL_DEBUG_HC(priv,
2862                         "Scan request while uninitialized. Queuing.\n");
2863                 goto done;
2864         }
2865
2866         if (!priv->scan_cmd) {
2867                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2868                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2869                 if (!priv->scan_cmd) {
2870                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2871                         goto done;
2872                 }
2873         }
2874         scan = priv->scan_cmd;
2875         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2876
2877         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2878         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2879
2880         if (iwl_is_associated(priv)) {
2881                 u16 interval = 0;
2882                 u32 extra;
2883                 u32 suspend_time = 100;
2884                 u32 scan_suspend_time = 100;
2885                 unsigned long flags;
2886
2887                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2888
2889                 spin_lock_irqsave(&priv->lock, flags);
2890                 interval = vif ? vif->bss_conf.beacon_int : 0;
2891                 spin_unlock_irqrestore(&priv->lock, flags);
2892
2893                 scan->suspend_time = 0;
2894                 scan->max_out_time = cpu_to_le32(200 * 1024);
2895                 if (!interval)
2896                         interval = suspend_time;
2897                 /*
2898                  * suspend time format:
2899                  *  0-19: beacon interval in usec (time before exec.)
2900                  * 20-23: 0
2901                  * 24-31: number of beacons (suspend between channels)
2902                  */
2903
2904                 extra = (suspend_time / interval) << 24;
2905                 scan_suspend_time = 0xFF0FFFFF &
2906                     (extra | ((suspend_time % interval) * 1024));
2907
2908                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2909                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2910                                scan_suspend_time, interval);
2911         }
2912
2913         if (priv->is_internal_short_scan) {
2914                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2915         } else if (priv->scan_request->n_ssids) {
2916                 int i, p = 0;
2917                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2918                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2919                         /* always does wildcard anyway */
2920                         if (!priv->scan_request->ssids[i].ssid_len)
2921                                 continue;
2922                         scan->direct_scan[p].id = WLAN_EID_SSID;
2923                         scan->direct_scan[p].len =
2924                                 priv->scan_request->ssids[i].ssid_len;
2925                         memcpy(scan->direct_scan[p].ssid,
2926                                priv->scan_request->ssids[i].ssid,
2927                                priv->scan_request->ssids[i].ssid_len);
2928                         n_probes++;
2929                         p++;
2930                 }
2931                 is_active = true;
2932         } else
2933                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2934
2935         /* We don't build a direct scan probe request; the uCode will do
2936          * that based on the direct_mask added to each channel entry */
2937         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2938         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2939         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2940
2941         /* flags + rate selection */
2942
2943         switch (priv->scan_band) {
2944         case IEEE80211_BAND_2GHZ:
2945                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2946                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2947                 scan->good_CRC_th = 0;
2948                 band = IEEE80211_BAND_2GHZ;
2949                 break;
2950         case IEEE80211_BAND_5GHZ:
2951                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2952                 /*
2953                  * If active scaning is requested but a certain channel
2954                  * is marked passive, we can do active scanning if we
2955                  * detect transmissions.
2956                  */
2957                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2958                                                 IWL_GOOD_CRC_TH_DISABLED;
2959                 band = IEEE80211_BAND_5GHZ;
2960                 break;
2961         default:
2962                 IWL_WARN(priv, "Invalid scan band\n");
2963                 goto done;
2964         }
2965
2966         if (!priv->is_internal_short_scan) {
2967                 scan->tx_cmd.len = cpu_to_le16(
2968                         iwl_fill_probe_req(priv,
2969                                 (struct ieee80211_mgmt *)scan->data,
2970                                 priv->scan_request->ie,
2971                                 priv->scan_request->ie_len,
2972                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2973         } else {
2974                 scan->tx_cmd.len = cpu_to_le16(
2975                         iwl_fill_probe_req(priv,
2976                                 (struct ieee80211_mgmt *)scan->data,
2977                                 NULL, 0,
2978                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2979         }
2980         /* select Rx antennas */
2981         scan->flags |= iwl3945_get_antenna_flags(priv);
2982
2983         scan->channel_count =
2984                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2985                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2986
2987         if (scan->channel_count == 0) {
2988                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2989                 goto done;
2990         }
2991
2992         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2993             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2994         cmd.data = scan;
2995         scan->len = cpu_to_le16(cmd.len);
2996
2997         set_bit(STATUS_SCAN_HW, &priv->status);
2998         if (iwl_send_cmd_sync(priv, &cmd))
2999                 goto done;
3000
3001         queue_delayed_work(priv->workqueue, &priv->scan_check,
3002                            IWL_SCAN_CHECK_WATCHDOG);
3003
3004         return;
3005
3006  done:
3007         /* can not perform scan make sure we clear scanning
3008          * bits from status so next scan request can be performed.
3009          * if we dont clear scanning status bit here all next scan
3010          * will fail
3011         */
3012         clear_bit(STATUS_SCAN_HW, &priv->status);
3013         clear_bit(STATUS_SCANNING, &priv->status);
3014
3015         /* inform mac80211 scan aborted */
3016         queue_work(priv->workqueue, &priv->scan_completed);
3017 }
3018
3019 static void iwl3945_bg_restart(struct work_struct *data)
3020 {
3021         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3022
3023         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3024                 return;
3025
3026         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3027                 mutex_lock(&priv->mutex);
3028                 priv->vif = NULL;
3029                 priv->is_open = 0;
3030                 mutex_unlock(&priv->mutex);
3031                 iwl3945_down(priv);
3032                 ieee80211_restart_hw(priv->hw);
3033         } else {
3034                 iwl3945_down(priv);
3035
3036                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3037                         return;
3038
3039                 mutex_lock(&priv->mutex);
3040                 __iwl3945_up(priv);
3041                 mutex_unlock(&priv->mutex);
3042         }
3043 }
3044
3045 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3046 {
3047         struct iwl_priv *priv =
3048             container_of(data, struct iwl_priv, rx_replenish);
3049
3050         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3051                 return;
3052
3053         mutex_lock(&priv->mutex);
3054         iwl3945_rx_replenish(priv);
3055         mutex_unlock(&priv->mutex);
3056 }
3057
3058 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3059 {
3060         int rc = 0;
3061         struct ieee80211_conf *conf = NULL;
3062
3063         if (!vif || !priv->is_open)
3064                 return;
3065
3066         if (vif->type == NL80211_IFTYPE_AP) {
3067                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3068                 return;
3069         }
3070
3071         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3072                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3073
3074         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3075                 return;
3076
3077         iwl_scan_cancel_timeout(priv, 200);
3078
3079         conf = ieee80211_get_hw_conf(priv->hw);
3080
3081         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3082         iwlcore_commit_rxon(priv);
3083
3084         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3085         iwl_setup_rxon_timing(priv, vif);
3086         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3087                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3088         if (rc)
3089                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3090                             "Attempting to continue.\n");
3091
3092         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3093
3094         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3095
3096         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3097                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3098
3099         if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3100                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3101         else
3102                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3103
3104         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3105                 if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3106                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3107                 else
3108                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3109
3110                 if (vif->type == NL80211_IFTYPE_ADHOC)
3111                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3112         }
3113
3114         iwlcore_commit_rxon(priv);
3115
3116         switch (vif->type) {
3117         case NL80211_IFTYPE_STATION:
3118                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3119                 break;
3120         case NL80211_IFTYPE_ADHOC:
3121                 iwl3945_send_beacon_cmd(priv);
3122                 break;
3123         default:
3124                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3125                         __func__, vif->type);
3126                 break;
3127         }
3128 }
3129
3130 /*****************************************************************************
3131  *
3132  * mac80211 entry point functions
3133  *
3134  *****************************************************************************/
3135
3136 #define UCODE_READY_TIMEOUT     (2 * HZ)
3137
3138 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3139 {
3140         struct iwl_priv *priv = hw->priv;
3141         int ret;
3142
3143         IWL_DEBUG_MAC80211(priv, "enter\n");
3144
3145         /* we should be verifying the device is ready to be opened */
3146         mutex_lock(&priv->mutex);
3147
3148         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3149          * ucode filename and max sizes are card-specific. */
3150
3151         if (!priv->ucode_code.len) {
3152                 ret = iwl3945_read_ucode(priv);
3153                 if (ret) {
3154                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3155                         mutex_unlock(&priv->mutex);
3156                         goto out_release_irq;
3157                 }
3158         }
3159
3160         ret = __iwl3945_up(priv);
3161
3162         mutex_unlock(&priv->mutex);
3163
3164         if (ret)
3165                 goto out_release_irq;
3166
3167         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3168
3169         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3170          * mac80211 will not be run successfully. */
3171         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3172                         test_bit(STATUS_READY, &priv->status),
3173                         UCODE_READY_TIMEOUT);
3174         if (!ret) {
3175                 if (!test_bit(STATUS_READY, &priv->status)) {
3176                         IWL_ERR(priv,
3177                                 "Wait for START_ALIVE timeout after %dms.\n",
3178                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3179                         ret = -ETIMEDOUT;
3180                         goto out_release_irq;
3181                 }
3182         }
3183
3184         /* ucode is running and will send rfkill notifications,
3185          * no need to poll the killswitch state anymore */
3186         cancel_delayed_work(&priv->_3945.rfkill_poll);
3187
3188         iwl_led_start(priv);
3189
3190         priv->is_open = 1;
3191         IWL_DEBUG_MAC80211(priv, "leave\n");
3192         return 0;
3193
3194 out_release_irq:
3195         priv->is_open = 0;
3196         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3197         return ret;
3198 }
3199
3200 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3201 {
3202         struct iwl_priv *priv = hw->priv;
3203
3204         IWL_DEBUG_MAC80211(priv, "enter\n");
3205
3206         if (!priv->is_open) {
3207                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3208                 return;
3209         }
3210
3211         priv->is_open = 0;
3212
3213         if (iwl_is_ready_rf(priv)) {
3214                 /* stop mac, cancel any scan request and clear
3215                  * RXON_FILTER_ASSOC_MSK BIT
3216                  */
3217                 mutex_lock(&priv->mutex);
3218                 iwl_scan_cancel_timeout(priv, 100);
3219                 mutex_unlock(&priv->mutex);
3220         }
3221
3222         iwl3945_down(priv);
3223
3224         flush_workqueue(priv->workqueue);
3225
3226         /* start polling the killswitch state again */
3227         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3228                            round_jiffies_relative(2 * HZ));
3229
3230         IWL_DEBUG_MAC80211(priv, "leave\n");
3231 }
3232
3233 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3234 {
3235         struct iwl_priv *priv = hw->priv;
3236
3237         IWL_DEBUG_MAC80211(priv, "enter\n");
3238
3239         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3240                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3241
3242         if (iwl3945_tx_skb(priv, skb))
3243                 dev_kfree_skb_any(skb);
3244
3245         IWL_DEBUG_MAC80211(priv, "leave\n");
3246         return NETDEV_TX_OK;
3247 }
3248
3249 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3250 {
3251         int rc = 0;
3252
3253         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3254                 return;
3255
3256         /* The following should be done only at AP bring up */
3257         if (!(iwl_is_associated(priv))) {
3258
3259                 /* RXON - unassoc (to set timing command) */
3260                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3261                 iwlcore_commit_rxon(priv);
3262
3263                 /* RXON Timing */
3264                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3265                 iwl_setup_rxon_timing(priv, vif);
3266                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3267                                       sizeof(priv->rxon_timing),
3268                                       &priv->rxon_timing);
3269                 if (rc)
3270                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3271                                         "Attempting to continue.\n");
3272
3273                 priv->staging_rxon.assoc_id = 0;
3274
3275                 if (vif->bss_conf.assoc_capability &
3276                                         WLAN_CAPABILITY_SHORT_PREAMBLE)
3277                         priv->staging_rxon.flags |=
3278                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3279                 else
3280                         priv->staging_rxon.flags &=
3281                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3282
3283                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3284                         if (vif->bss_conf.assoc_capability &
3285                                         WLAN_CAPABILITY_SHORT_SLOT_TIME)
3286                                 priv->staging_rxon.flags |=
3287                                         RXON_FLG_SHORT_SLOT_MSK;
3288                         else
3289                                 priv->staging_rxon.flags &=
3290                                         ~RXON_FLG_SHORT_SLOT_MSK;
3291
3292                         if (vif->type == NL80211_IFTYPE_ADHOC)
3293                                 priv->staging_rxon.flags &=
3294                                         ~RXON_FLG_SHORT_SLOT_MSK;
3295                 }
3296                 /* restore RXON assoc */
3297                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3298                 iwlcore_commit_rxon(priv);
3299         }
3300         iwl3945_send_beacon_cmd(priv);
3301
3302         /* FIXME - we need to add code here to detect a totally new
3303          * configuration, reset the AP, unassoc, rxon timing, assoc,
3304          * clear sta table, add BCAST sta... */
3305 }
3306
3307 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3308                                struct ieee80211_vif *vif,
3309                                struct ieee80211_sta *sta,
3310                                struct ieee80211_key_conf *key)
3311 {
3312         struct iwl_priv *priv = hw->priv;
3313         int ret = 0;
3314         u8 sta_id = IWL_INVALID_STATION;
3315         u8 static_key;
3316
3317         IWL_DEBUG_MAC80211(priv, "enter\n");
3318
3319         if (iwl3945_mod_params.sw_crypto) {
3320                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3321                 return -EOPNOTSUPP;
3322         }
3323
3324         static_key = !iwl_is_associated(priv);
3325
3326         if (!static_key) {
3327                 sta_id = iwl_sta_id_or_broadcast(priv, sta);
3328                 if (sta_id == IWL_INVALID_STATION)
3329                         return -EINVAL;
3330         }
3331
3332         mutex_lock(&priv->mutex);
3333         iwl_scan_cancel_timeout(priv, 100);
3334
3335         switch (cmd) {
3336         case SET_KEY:
3337                 if (static_key)
3338                         ret = iwl3945_set_static_key(priv, key);
3339                 else
3340                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3341                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3342                 break;
3343         case DISABLE_KEY:
3344                 if (static_key)
3345                         ret = iwl3945_remove_static_key(priv);
3346                 else
3347                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3348                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3349                 break;
3350         default:
3351                 ret = -EINVAL;
3352         }
3353
3354         mutex_unlock(&priv->mutex);
3355         IWL_DEBUG_MAC80211(priv, "leave\n");
3356
3357         return ret;
3358 }
3359
3360 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3361                                struct ieee80211_vif *vif,
3362                                struct ieee80211_sta *sta)
3363 {
3364         struct iwl_priv *priv = hw->priv;
3365         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3366         int ret;
3367         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3368         u8 sta_id;
3369
3370         sta_priv->common.sta_id = IWL_INVALID_STATION;
3371
3372         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3373                         sta->addr);
3374
3375         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3376                                      &sta_id);
3377         if (ret) {
3378                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3379                         sta->addr, ret);
3380                 /* Should we return success if return code is EEXIST ? */
3381                 return ret;
3382         }
3383
3384         sta_priv->common.sta_id = sta_id;
3385
3386         /* Initialize rate scaling */
3387         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3388                        sta->addr);
3389         iwl3945_rs_rate_init(priv, sta, sta_id);
3390
3391         return 0;
3392 }
3393 /*****************************************************************************
3394  *
3395  * sysfs attributes
3396  *
3397  *****************************************************************************/
3398
3399 #ifdef CONFIG_IWLWIFI_DEBUG
3400
3401 /*
3402  * The following adds a new attribute to the sysfs representation
3403  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3404  * used for controlling the debug level.
3405  *
3406  * See the level definitions in iwl for details.
3407  *
3408  * The debug_level being managed using sysfs below is a per device debug
3409  * level that is used instead of the global debug level if it (the per
3410  * device debug level) is set.
3411  */
3412 static ssize_t show_debug_level(struct device *d,
3413                                 struct device_attribute *attr, char *buf)
3414 {
3415         struct iwl_priv *priv = dev_get_drvdata(d);
3416         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3417 }
3418 static ssize_t store_debug_level(struct device *d,
3419                                 struct device_attribute *attr,
3420                                  const char *buf, size_t count)
3421 {
3422         struct iwl_priv *priv = dev_get_drvdata(d);
3423         unsigned long val;
3424         int ret;
3425
3426         ret = strict_strtoul(buf, 0, &val);
3427         if (ret)
3428                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3429         else {
3430                 priv->debug_level = val;
3431                 if (iwl_alloc_traffic_mem(priv))
3432                         IWL_ERR(priv,
3433                                 "Not enough memory to generate traffic log\n");
3434         }
3435         return strnlen(buf, count);
3436 }
3437
3438 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3439                         show_debug_level, store_debug_level);
3440
3441 #endif /* CONFIG_IWLWIFI_DEBUG */
3442
3443 static ssize_t show_temperature(struct device *d,
3444                                 struct device_attribute *attr, char *buf)
3445 {
3446         struct iwl_priv *priv = dev_get_drvdata(d);
3447
3448         if (!iwl_is_alive(priv))
3449                 return -EAGAIN;
3450
3451         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3452 }
3453
3454 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3455
3456 static ssize_t show_tx_power(struct device *d,
3457                              struct device_attribute *attr, char *buf)
3458 {
3459         struct iwl_priv *priv = dev_get_drvdata(d);
3460         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3461 }
3462
3463 static ssize_t store_tx_power(struct device *d,
3464                               struct device_attribute *attr,
3465                               const char *buf, size_t count)
3466 {
3467         struct iwl_priv *priv = dev_get_drvdata(d);
3468         char *p = (char *)buf;
3469         u32 val;
3470
3471         val = simple_strtoul(p, &p, 10);
3472         if (p == buf)
3473                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3474         else
3475                 iwl3945_hw_reg_set_txpower(priv, val);
3476
3477         return count;
3478 }
3479
3480 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3481
3482 static ssize_t show_flags(struct device *d,
3483                           struct device_attribute *attr, char *buf)
3484 {
3485         struct iwl_priv *priv = dev_get_drvdata(d);
3486
3487         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3488 }
3489
3490 static ssize_t store_flags(struct device *d,
3491                            struct device_attribute *attr,
3492                            const char *buf, size_t count)
3493 {
3494         struct iwl_priv *priv = dev_get_drvdata(d);
3495         u32 flags = simple_strtoul(buf, NULL, 0);
3496
3497         mutex_lock(&priv->mutex);
3498         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3499                 /* Cancel any currently running scans... */
3500                 if (iwl_scan_cancel_timeout(priv, 100))
3501                         IWL_WARN(priv, "Could not cancel scan.\n");
3502                 else {
3503                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3504                                        flags);
3505                         priv->staging_rxon.flags = cpu_to_le32(flags);
3506                         iwlcore_commit_rxon(priv);
3507                 }
3508         }
3509         mutex_unlock(&priv->mutex);
3510
3511         return count;
3512 }
3513
3514 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3515
3516 static ssize_t show_filter_flags(struct device *d,
3517                                  struct device_attribute *attr, char *buf)
3518 {
3519         struct iwl_priv *priv = dev_get_drvdata(d);
3520
3521         return sprintf(buf, "0x%04X\n",
3522                 le32_to_cpu(priv->active_rxon.filter_flags));
3523 }
3524
3525 static ssize_t store_filter_flags(struct device *d,
3526                                   struct device_attribute *attr,
3527                                   const char *buf, size_t count)
3528 {
3529         struct iwl_priv *priv = dev_get_drvdata(d);
3530         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3531
3532         mutex_lock(&priv->mutex);
3533         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3534                 /* Cancel any currently running scans... */
3535                 if (iwl_scan_cancel_timeout(priv, 100))
3536                         IWL_WARN(priv, "Could not cancel scan.\n");
3537                 else {
3538                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3539                                        "0x%04X\n", filter_flags);
3540                         priv->staging_rxon.filter_flags =
3541                                 cpu_to_le32(filter_flags);
3542                         iwlcore_commit_rxon(priv);
3543                 }
3544         }
3545         mutex_unlock(&priv->mutex);
3546
3547         return count;
3548 }
3549
3550 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3551                    store_filter_flags);
3552
3553 static ssize_t show_measurement(struct device *d,
3554                                 struct device_attribute *attr, char *buf)
3555 {
3556         struct iwl_priv *priv = dev_get_drvdata(d);
3557         struct iwl_spectrum_notification measure_report;
3558         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3559         u8 *data = (u8 *)&measure_report;
3560         unsigned long flags;
3561
3562         spin_lock_irqsave(&priv->lock, flags);
3563         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3564                 spin_unlock_irqrestore(&priv->lock, flags);
3565                 return 0;
3566         }
3567         memcpy(&measure_report, &priv->measure_report, size);
3568         priv->measurement_status = 0;
3569         spin_unlock_irqrestore(&priv->lock, flags);
3570
3571         while (size && (PAGE_SIZE - len)) {
3572                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3573                                    PAGE_SIZE - len, 1);
3574                 len = strlen(buf);
3575                 if (PAGE_SIZE - len)
3576                         buf[len++] = '\n';
3577
3578                 ofs += 16;
3579                 size -= min(size, 16U);
3580         }
3581
3582         return len;
3583 }
3584
3585 static ssize_t store_measurement(struct device *d,
3586                                  struct device_attribute *attr,
3587                                  const char *buf, size_t count)
3588 {
3589         struct iwl_priv *priv = dev_get_drvdata(d);
3590         struct ieee80211_measurement_params params = {
3591                 .channel = le16_to_cpu(priv->active_rxon.channel),
3592                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3593                 .duration = cpu_to_le16(1),
3594         };
3595         u8 type = IWL_MEASURE_BASIC;
3596         u8 buffer[32];
3597         u8 channel;
3598
3599         if (count) {
3600                 char *p = buffer;
3601                 strncpy(buffer, buf, min(sizeof(buffer), count));
3602                 channel = simple_strtoul(p, NULL, 0);
3603                 if (channel)
3604                         params.channel = channel;
3605
3606                 p = buffer;
3607                 while (*p && *p != ' ')
3608                         p++;
3609                 if (*p)
3610                         type = simple_strtoul(p + 1, NULL, 0);
3611         }
3612
3613         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3614                        "channel %d (for '%s')\n", type, params.channel, buf);
3615         iwl3945_get_measurement(priv, &params, type);
3616
3617         return count;
3618 }
3619
3620 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3621                    show_measurement, store_measurement);
3622
3623 static ssize_t store_retry_rate(struct device *d,
3624                                 struct device_attribute *attr,
3625                                 const char *buf, size_t count)
3626 {
3627         struct iwl_priv *priv = dev_get_drvdata(d);
3628
3629         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3630         if (priv->retry_rate <= 0)
3631                 priv->retry_rate = 1;
3632
3633         return count;
3634 }
3635
3636 static ssize_t show_retry_rate(struct device *d,
3637                                struct device_attribute *attr, char *buf)
3638 {
3639         struct iwl_priv *priv = dev_get_drvdata(d);
3640         return sprintf(buf, "%d", priv->retry_rate);
3641 }
3642
3643 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3644                    store_retry_rate);
3645
3646
3647 static ssize_t show_channels(struct device *d,
3648                              struct device_attribute *attr, char *buf)
3649 {
3650         /* all this shit doesn't belong into sysfs anyway */
3651         return 0;
3652 }
3653
3654 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3655
3656 static ssize_t show_antenna(struct device *d,
3657                             struct device_attribute *attr, char *buf)
3658 {
3659         struct iwl_priv *priv = dev_get_drvdata(d);
3660
3661         if (!iwl_is_alive(priv))
3662                 return -EAGAIN;
3663
3664         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3665 }
3666
3667 static ssize_t store_antenna(struct device *d,
3668                              struct device_attribute *attr,
3669                              const char *buf, size_t count)
3670 {
3671         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3672         int ant;
3673
3674         if (count == 0)
3675                 return 0;
3676
3677         if (sscanf(buf, "%1i", &ant) != 1) {
3678                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3679                 return count;
3680         }
3681
3682         if ((ant >= 0) && (ant <= 2)) {
3683                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3684                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3685         } else
3686                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3687
3688
3689         return count;
3690 }
3691
3692 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3693
3694 static ssize_t show_status(struct device *d,
3695                            struct device_attribute *attr, char *buf)
3696 {
3697         struct iwl_priv *priv = dev_get_drvdata(d);
3698         if (!iwl_is_alive(priv))
3699                 return -EAGAIN;
3700         return sprintf(buf, "0x%08x\n", (int)priv->status);
3701 }
3702
3703 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3704
3705 static ssize_t dump_error_log(struct device *d,
3706                               struct device_attribute *attr,
3707                               const char *buf, size_t count)
3708 {
3709         struct iwl_priv *priv = dev_get_drvdata(d);
3710         char *p = (char *)buf;
3711
3712         if (p[0] == '1')
3713                 iwl3945_dump_nic_error_log(priv);
3714
3715         return strnlen(buf, count);
3716 }
3717
3718 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3719
3720 /*****************************************************************************
3721  *
3722  * driver setup and tear down
3723  *
3724  *****************************************************************************/
3725
3726 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3727 {
3728         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3729
3730         init_waitqueue_head(&priv->wait_command_queue);
3731
3732         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3733         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3734         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3735         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3736         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3737         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3738         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3739         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3740         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3741         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3742
3743         iwl3945_hw_setup_deferred_work(priv);
3744
3745         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3746                 init_timer(&priv->monitor_recover);
3747                 priv->monitor_recover.data = (unsigned long)priv;
3748                 priv->monitor_recover.function =
3749                         priv->cfg->ops->lib->recover_from_tx_stall;
3750         }
3751
3752         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3753                      iwl3945_irq_tasklet, (unsigned long)priv);
3754 }
3755
3756 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3757 {
3758         iwl3945_hw_cancel_deferred_work(priv);
3759
3760         cancel_delayed_work_sync(&priv->init_alive_start);
3761         cancel_delayed_work(&priv->scan_check);
3762         cancel_delayed_work(&priv->alive_start);
3763         cancel_work_sync(&priv->start_internal_scan);
3764         cancel_work_sync(&priv->beacon_update);
3765         if (priv->cfg->ops->lib->recover_from_tx_stall)
3766                 del_timer_sync(&priv->monitor_recover);
3767 }
3768
3769 static struct attribute *iwl3945_sysfs_entries[] = {
3770         &dev_attr_antenna.attr,
3771         &dev_attr_channels.attr,
3772         &dev_attr_dump_errors.attr,
3773         &dev_attr_flags.attr,
3774         &dev_attr_filter_flags.attr,
3775         &dev_attr_measurement.attr,
3776         &dev_attr_retry_rate.attr,
3777         &dev_attr_status.attr,
3778         &dev_attr_temperature.attr,
3779         &dev_attr_tx_power.attr,
3780 #ifdef CONFIG_IWLWIFI_DEBUG
3781         &dev_attr_debug_level.attr,
3782 #endif
3783         NULL
3784 };
3785
3786 static struct attribute_group iwl3945_attribute_group = {
3787         .name = NULL,           /* put in device directory */
3788         .attrs = iwl3945_sysfs_entries,
3789 };
3790
3791 static struct ieee80211_ops iwl3945_hw_ops = {
3792         .tx = iwl3945_mac_tx,
3793         .start = iwl3945_mac_start,
3794         .stop = iwl3945_mac_stop,
3795         .add_interface = iwl_mac_add_interface,
3796         .remove_interface = iwl_mac_remove_interface,
3797         .config = iwl_mac_config,
3798         .configure_filter = iwl_configure_filter,
3799         .set_key = iwl3945_mac_set_key,
3800         .conf_tx = iwl_mac_conf_tx,
3801         .reset_tsf = iwl_mac_reset_tsf,
3802         .bss_info_changed = iwl_bss_info_changed,
3803         .hw_scan = iwl_mac_hw_scan,
3804         .sta_add = iwl3945_mac_sta_add,
3805         .sta_remove = iwl_mac_sta_remove,
3806 };
3807
3808 static int iwl3945_init_drv(struct iwl_priv *priv)
3809 {
3810         int ret;
3811         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3812
3813         priv->retry_rate = 1;
3814         priv->ibss_beacon = NULL;
3815
3816         spin_lock_init(&priv->sta_lock);
3817         spin_lock_init(&priv->hcmd_lock);
3818
3819         INIT_LIST_HEAD(&priv->free_frames);
3820
3821         mutex_init(&priv->mutex);
3822         mutex_init(&priv->sync_cmd_mutex);
3823
3824         priv->ieee_channels = NULL;
3825         priv->ieee_rates = NULL;
3826         priv->band = IEEE80211_BAND_2GHZ;
3827
3828         priv->iw_mode = NL80211_IFTYPE_STATION;
3829         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3830
3831         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3832
3833         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3834                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3835                          eeprom->version);
3836                 ret = -EINVAL;
3837                 goto err;
3838         }
3839         ret = iwl_init_channel_map(priv);
3840         if (ret) {
3841                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3842                 goto err;
3843         }
3844
3845         /* Set up txpower settings in driver for all channels */
3846         if (iwl3945_txpower_set_from_eeprom(priv)) {
3847                 ret = -EIO;
3848                 goto err_free_channel_map;
3849         }
3850
3851         ret = iwlcore_init_geos(priv);
3852         if (ret) {
3853                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3854                 goto err_free_channel_map;
3855         }
3856         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3857
3858         return 0;
3859
3860 err_free_channel_map:
3861         iwl_free_channel_map(priv);
3862 err:
3863         return ret;
3864 }
3865
3866 #define IWL3945_MAX_PROBE_REQUEST       200
3867
3868 static int iwl3945_setup_mac(struct iwl_priv *priv)
3869 {
3870         int ret;
3871         struct ieee80211_hw *hw = priv->hw;
3872
3873         hw->rate_control_algorithm = "iwl-3945-rs";
3874         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3875         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3876
3877         /* Tell mac80211 our characteristics */
3878         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3879                     IEEE80211_HW_SPECTRUM_MGMT;
3880
3881         if (!priv->cfg->broken_powersave)
3882                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3883                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3884
3885         hw->wiphy->interface_modes =
3886                 BIT(NL80211_IFTYPE_STATION) |
3887                 BIT(NL80211_IFTYPE_ADHOC);
3888
3889         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3890                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3891
3892         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3893         /* we create the 802.11 header and a zero-length SSID element */
3894         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3895
3896         /* Default value; 4 EDCA QOS priorities */
3897         hw->queues = 4;
3898
3899         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3900                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3901                         &priv->bands[IEEE80211_BAND_2GHZ];
3902
3903         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3904                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3905                         &priv->bands[IEEE80211_BAND_5GHZ];
3906
3907         ret = ieee80211_register_hw(priv->hw);
3908         if (ret) {
3909                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3910                 return ret;
3911         }
3912         priv->mac80211_registered = 1;
3913
3914         return 0;
3915 }
3916
3917 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3918 {
3919         int err = 0;
3920         struct iwl_priv *priv;
3921         struct ieee80211_hw *hw;
3922         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3923         struct iwl3945_eeprom *eeprom;
3924         unsigned long flags;
3925
3926         /***********************
3927          * 1. Allocating HW data
3928          * ********************/
3929
3930         /* mac80211 allocates memory for this device instance, including
3931          *   space for this driver's private structure */
3932         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3933         if (hw == NULL) {
3934                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3935                 err = -ENOMEM;
3936                 goto out;
3937         }
3938         priv = hw->priv;
3939         SET_IEEE80211_DEV(hw, &pdev->dev);
3940
3941         /*
3942          * Disabling hardware scan means that mac80211 will perform scans
3943          * "the hard way", rather than using device's scan.
3944          */
3945         if (iwl3945_mod_params.disable_hw_scan) {
3946                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3947                 iwl3945_hw_ops.hw_scan = NULL;
3948         }
3949
3950
3951         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3952         priv->cfg = cfg;
3953         priv->pci_dev = pdev;
3954         priv->inta_mask = CSR_INI_SET_MASK;
3955
3956 #ifdef CONFIG_IWLWIFI_DEBUG
3957         atomic_set(&priv->restrict_refcnt, 0);
3958 #endif
3959         if (iwl_alloc_traffic_mem(priv))
3960                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3961
3962         /***************************
3963          * 2. Initializing PCI bus
3964          * *************************/
3965         if (pci_enable_device(pdev)) {
3966                 err = -ENODEV;
3967                 goto out_ieee80211_free_hw;
3968         }
3969
3970         pci_set_master(pdev);
3971
3972         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3973         if (!err)
3974                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3975         if (err) {
3976                 IWL_WARN(priv, "No suitable DMA available.\n");
3977                 goto out_pci_disable_device;
3978         }
3979
3980         pci_set_drvdata(pdev, priv);
3981         err = pci_request_regions(pdev, DRV_NAME);
3982         if (err)
3983                 goto out_pci_disable_device;
3984
3985         /***********************
3986          * 3. Read REV Register
3987          * ********************/
3988         priv->hw_base = pci_iomap(pdev, 0, 0);
3989         if (!priv->hw_base) {
3990                 err = -ENODEV;
3991                 goto out_pci_release_regions;
3992         }
3993
3994         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3995                         (unsigned long long) pci_resource_len(pdev, 0));
3996         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3997
3998         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3999          * PCI Tx retries from interfering with C3 CPU state */
4000         pci_write_config_byte(pdev, 0x41, 0x00);
4001
4002         /* these spin locks will be used in apm_ops.init and EEPROM access
4003          * we should init now
4004          */
4005         spin_lock_init(&priv->reg_lock);
4006         spin_lock_init(&priv->lock);
4007
4008         /*
4009          * stop and reset the on-board processor just in case it is in a
4010          * strange state ... like being left stranded by a primary kernel
4011          * and this is now the kdump kernel trying to start up
4012          */
4013         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4014
4015         /***********************
4016          * 4. Read EEPROM
4017          * ********************/
4018
4019         /* Read the EEPROM */
4020         err = iwl_eeprom_init(priv);
4021         if (err) {
4022                 IWL_ERR(priv, "Unable to init EEPROM\n");
4023                 goto out_iounmap;
4024         }
4025         /* MAC Address location in EEPROM same for 3945/4965 */
4026         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4027         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4028         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4029         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4030
4031         /***********************
4032          * 5. Setup HW Constants
4033          * ********************/
4034         /* Device-specific setup */
4035         if (iwl3945_hw_set_hw_params(priv)) {
4036                 IWL_ERR(priv, "failed to set hw settings\n");
4037                 goto out_eeprom_free;
4038         }
4039
4040         /***********************
4041          * 6. Setup priv
4042          * ********************/
4043
4044         err = iwl3945_init_drv(priv);
4045         if (err) {
4046                 IWL_ERR(priv, "initializing driver failed\n");
4047                 goto out_unset_hw_params;
4048         }
4049
4050         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4051                 priv->cfg->name);
4052
4053         /***********************
4054          * 7. Setup Services
4055          * ********************/
4056
4057         spin_lock_irqsave(&priv->lock, flags);
4058         iwl_disable_interrupts(priv);
4059         spin_unlock_irqrestore(&priv->lock, flags);
4060
4061         pci_enable_msi(priv->pci_dev);
4062
4063         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4064                           IRQF_SHARED, DRV_NAME, priv);
4065         if (err) {
4066                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4067                 goto out_disable_msi;
4068         }
4069
4070         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4071         if (err) {
4072                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4073                 goto out_release_irq;
4074         }
4075
4076         iwl_set_rxon_channel(priv,
4077                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4078         iwl3945_setup_deferred_work(priv);
4079         iwl3945_setup_rx_handlers(priv);
4080         iwl_power_initialize(priv);
4081
4082         /*********************************
4083          * 8. Setup and Register mac80211
4084          * *******************************/
4085
4086         iwl_enable_interrupts(priv);
4087
4088         err = iwl3945_setup_mac(priv);
4089         if (err)
4090                 goto  out_remove_sysfs;
4091
4092         err = iwl_dbgfs_register(priv, DRV_NAME);
4093         if (err)
4094                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4095
4096         /* Start monitoring the killswitch */
4097         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4098                            2 * HZ);
4099
4100         return 0;
4101
4102  out_remove_sysfs:
4103         destroy_workqueue(priv->workqueue);
4104         priv->workqueue = NULL;
4105         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4106  out_release_irq:
4107         free_irq(priv->pci_dev->irq, priv);
4108  out_disable_msi:
4109         pci_disable_msi(priv->pci_dev);
4110         iwlcore_free_geos(priv);
4111         iwl_free_channel_map(priv);
4112  out_unset_hw_params:
4113         iwl3945_unset_hw_params(priv);
4114  out_eeprom_free:
4115         iwl_eeprom_free(priv);
4116  out_iounmap:
4117         pci_iounmap(pdev, priv->hw_base);
4118  out_pci_release_regions:
4119         pci_release_regions(pdev);
4120  out_pci_disable_device:
4121         pci_set_drvdata(pdev, NULL);
4122         pci_disable_device(pdev);
4123  out_ieee80211_free_hw:
4124         iwl_free_traffic_mem(priv);
4125         ieee80211_free_hw(priv->hw);
4126  out:
4127         return err;
4128 }
4129
4130 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4131 {
4132         struct iwl_priv *priv = pci_get_drvdata(pdev);
4133         unsigned long flags;
4134
4135         if (!priv)
4136                 return;
4137
4138         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4139
4140         iwl_dbgfs_unregister(priv);
4141
4142         set_bit(STATUS_EXIT_PENDING, &priv->status);
4143
4144         if (priv->mac80211_registered) {
4145                 ieee80211_unregister_hw(priv->hw);
4146                 priv->mac80211_registered = 0;
4147         } else {
4148                 iwl3945_down(priv);
4149         }
4150
4151         /*
4152          * Make sure device is reset to low power before unloading driver.
4153          * This may be redundant with iwl_down(), but there are paths to
4154          * run iwl_down() without calling apm_ops.stop(), and there are
4155          * paths to avoid running iwl_down() at all before leaving driver.
4156          * This (inexpensive) call *makes sure* device is reset.
4157          */
4158         priv->cfg->ops->lib->apm_ops.stop(priv);
4159
4160         /* make sure we flush any pending irq or
4161          * tasklet for the driver
4162          */
4163         spin_lock_irqsave(&priv->lock, flags);
4164         iwl_disable_interrupts(priv);
4165         spin_unlock_irqrestore(&priv->lock, flags);
4166
4167         iwl_synchronize_irq(priv);
4168
4169         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4170
4171         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4172
4173         iwl3945_dealloc_ucode_pci(priv);
4174
4175         if (priv->rxq.bd)
4176                 iwl3945_rx_queue_free(priv, &priv->rxq);
4177         iwl3945_hw_txq_ctx_free(priv);
4178
4179         iwl3945_unset_hw_params(priv);
4180
4181         /*netif_stop_queue(dev); */
4182         flush_workqueue(priv->workqueue);
4183
4184         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4185          * priv->workqueue... so we can't take down the workqueue
4186          * until now... */
4187         destroy_workqueue(priv->workqueue);
4188         priv->workqueue = NULL;
4189         iwl_free_traffic_mem(priv);
4190
4191         free_irq(pdev->irq, priv);
4192         pci_disable_msi(pdev);
4193
4194         pci_iounmap(pdev, priv->hw_base);
4195         pci_release_regions(pdev);
4196         pci_disable_device(pdev);
4197         pci_set_drvdata(pdev, NULL);
4198
4199         iwl_free_channel_map(priv);
4200         iwlcore_free_geos(priv);
4201         kfree(priv->scan_cmd);
4202         if (priv->ibss_beacon)
4203                 dev_kfree_skb(priv->ibss_beacon);
4204
4205         ieee80211_free_hw(priv->hw);
4206 }
4207
4208
4209 /*****************************************************************************
4210  *
4211  * driver and module entry point
4212  *
4213  *****************************************************************************/
4214
4215 static struct pci_driver iwl3945_driver = {
4216         .name = DRV_NAME,
4217         .id_table = iwl3945_hw_card_ids,
4218         .probe = iwl3945_pci_probe,
4219         .remove = __devexit_p(iwl3945_pci_remove),
4220 #ifdef CONFIG_PM
4221         .suspend = iwl_pci_suspend,
4222         .resume = iwl_pci_resume,
4223 #endif
4224 };
4225
4226 static int __init iwl3945_init(void)
4227 {
4228
4229         int ret;
4230         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4231         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4232
4233         ret = iwl3945_rate_control_register();
4234         if (ret) {
4235                 printk(KERN_ERR DRV_NAME
4236                        "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                 printk(KERN_ERR DRV_NAME "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);