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
 200         spin_lock_irqsave(&priv->sta_lock, flags);
 201         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 202         memset(&priv->stations[sta_id].sta.key, 0,
 203                 sizeof(struct iwl4965_keyinfo));
 204         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 205         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 206         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 207         spin_unlock_irqrestore(&priv->sta_lock, flags);
 208
 209         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 210         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 211         return 0;
 212 }
 213
 214 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 215                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 216 {
 217         int ret = 0;
 218
 219         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 220
 221         switch (keyconf->alg) {
 222         case ALG_CCMP:
 223                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 224                 break;
 225         case ALG_TKIP:
 226                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_WEP:
 229                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         default:
 232                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 233                 ret = -EINVAL;
 234         }
 235
 236         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 237                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 238                       sta_id, ret);
 239
 240         return ret;
 241 }
 242
 243 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 244 {
 245         int ret = -EOPNOTSUPP;
 246
 247         return ret;
 248 }
 249
 250 static int iwl3945_set_static_key(struct iwl_priv *priv,
 251                                 struct ieee80211_key_conf *key)
 252 {
 253         if (key->alg == ALG_WEP)
 254                 return -EOPNOTSUPP;
 255
 256         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 257         return -EINVAL;
 258 }
 259
 260 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 261 {
 262         struct list_head *element;
 263
 264         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 265                        priv->frames_count);
 266
 267         while (!list_empty(&priv->free_frames)) {
 268                 element = priv->free_frames.next;
 269                 list_del(element);
 270                 kfree(list_entry(element, struct iwl3945_frame, list));
 271                 priv->frames_count--;
 272         }
 273
 274         if (priv->frames_count) {
 275                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 276                             priv->frames_count);
 277                 priv->frames_count = 0;
 278         }
 279 }
 280
 281 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 282 {
 283         struct iwl3945_frame *frame;
 284         struct list_head *element;
 285         if (list_empty(&priv->free_frames)) {
 286                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 287                 if (!frame) {
 288                         IWL_ERR(priv, "Could not allocate frame!\n");
 289                         return NULL;
 290                 }
 291
 292                 priv->frames_count++;
 293                 return frame;
 294         }
 295
 296         element = priv->free_frames.next;
 297         list_del(element);
 298         return list_entry(element, struct iwl3945_frame, list);
 299 }
 300
 301 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 302 {
 303         memset(frame, 0, sizeof(*frame));
 304         list_add(&frame->list, &priv->free_frames);
 305 }
 306
 307 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 308                                 struct ieee80211_hdr *hdr,
 309                                 int left)
 310 {
 311
 312         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 313             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 314              (priv->iw_mode != NL80211_IFTYPE_AP)))
 315                 return 0;
 316
 317         if (priv->ibss_beacon->len > left)
 318                 return 0;
 319
 320         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 321
 322         return priv->ibss_beacon->len;
 323 }
 324
 325 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 326 {
 327         struct iwl3945_frame *frame;
 328         unsigned int frame_size;
 329         int rc;
 330         u8 rate;
 331
 332         frame = iwl3945_get_free_frame(priv);
 333
 334         if (!frame) {
 335                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 336                           "command.\n");
 337                 return -ENOMEM;
 338         }
 339
 340         rate = iwl_rate_get_lowest_plcp(priv);
 341
 342         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 343
 344         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 345                               &frame->u.cmd[0]);
 346
 347         iwl3945_free_frame(priv, frame);
 348
 349         return rc;
 350 }
 351
 352 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 353 {
 354         if (priv->_3945.shared_virt)
 355                 dma_free_coherent(&priv->pci_dev->dev,
 356                                   sizeof(struct iwl3945_shared),
 357                                   priv->_3945.shared_virt,
 358                                   priv->_3945.shared_phys);
 359 }
 360
 361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 362                                       struct ieee80211_tx_info *info,
 363                                       struct iwl_device_cmd *cmd,
 364                                       struct sk_buff *skb_frag,
 365                                       int sta_id)
 366 {
 367         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 368         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 369
 370         switch (keyinfo->alg) {
 371         case ALG_CCMP:
 372                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 373                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 374                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 375                 break;
 376
 377         case ALG_TKIP:
 378                 break;
 379
 380         case ALG_WEP:
 381                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 382                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 383
 384                 if (keyinfo->keylen == 13)
 385                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 386
 387                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 388
 389                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 390                              "with key %d\n", info->control.hw_key->hw_key_idx);
 391                 break;
 392
 393         default:
 394                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 395                 break;
 396         }
 397 }
 398
 399 /*
 400  * handle build REPLY_TX command notification.
 401  */
 402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 403                                   struct iwl_device_cmd *cmd,
 404                                   struct ieee80211_tx_info *info,
 405                                   struct ieee80211_hdr *hdr, u8 std_id)
 406 {
 407         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 408         __le32 tx_flags = tx_cmd->tx_flags;
 409         __le16 fc = hdr->frame_control;
 410
 411         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 412         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 413                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 414                 if (ieee80211_is_mgmt(fc))
 415                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 416                 if (ieee80211_is_probe_resp(fc) &&
 417                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 418                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 419         } else {
 420                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422         }
 423
 424         tx_cmd->sta_id = std_id;
 425         if (ieee80211_has_morefrags(fc))
 426                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 427
 428         if (ieee80211_is_data_qos(fc)) {
 429                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 430                 tx_cmd->tid_tspec = qc[0] & 0xf;
 431                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 432         } else {
 433                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 434         }
 435
 436         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 437
 438         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 439                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 440
 441         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 442         if (ieee80211_is_mgmt(fc)) {
 443                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 444                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 445                 else
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 447         } else {
 448                 tx_cmd->timeout.pm_frame_timeout = 0;
 449         }
 450
 451         tx_cmd->driver_txop = 0;
 452         tx_cmd->tx_flags = tx_flags;
 453         tx_cmd->next_frame_len = 0;
 454 }
 455
 456 /*
 457  * start REPLY_TX command process
 458  */
 459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 460 {
 461         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 462         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 463         struct iwl3945_tx_cmd *tx_cmd;
 464         struct iwl_tx_queue *txq = NULL;
 465         struct iwl_queue *q = NULL;
 466         struct iwl_device_cmd *out_cmd;
 467         struct iwl_cmd_meta *out_meta;
 468         dma_addr_t phys_addr;
 469         dma_addr_t txcmd_phys;
 470         int txq_id = skb_get_queue_mapping(skb);
 471         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 472         u8 id;
 473         u8 unicast;
 474         u8 sta_id;
 475         u8 tid = 0;
 476         u16 seq_number = 0;
 477         __le16 fc;
 478         u8 wait_write_ptr = 0;
 479         u8 *qc = NULL;
 480         unsigned long flags;
 481
 482         spin_lock_irqsave(&priv->lock, flags);
 483         if (iwl_is_rfkill(priv)) {
 484                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 485                 goto drop_unlock;
 486         }
 487
 488         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 489                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 490                 goto drop_unlock;
 491         }
 492
 493         unicast = !is_multicast_ether_addr(hdr->addr1);
 494         id = 0;
 495
 496         fc = hdr->frame_control;
 497
 498 #ifdef CONFIG_IWLWIFI_DEBUG
 499         if (ieee80211_is_auth(fc))
 500                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 501         else if (ieee80211_is_assoc_req(fc))
 502                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 503         else if (ieee80211_is_reassoc_req(fc))
 504                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 505 #endif
 506
 507         spin_unlock_irqrestore(&priv->lock, flags);
 508
 509         hdr_len = ieee80211_hdrlen(fc);
 510
 511         /* Find (or create) index into station table for destination station */
 512         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 513                 sta_id = priv->hw_params.bcast_sta_id;
 514         else
 515                 sta_id = iwl_get_sta_id(priv, hdr);
 516         if (sta_id == IWL_INVALID_STATION) {
 517                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 518                                hdr->addr1);
 519                 goto drop;
 520         }
 521
 522         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 523
 524         if (ieee80211_is_data_qos(fc)) {
 525                 qc = ieee80211_get_qos_ctl(hdr);
 526                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 527                 if (unlikely(tid >= MAX_TID_COUNT))
 528                         goto drop;
 529                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 530                                 IEEE80211_SCTL_SEQ;
 531                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 532                         (hdr->seq_ctrl &
 533                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 534                 seq_number += 0x10;
 535         }
 536
 537         /* Descriptor for chosen Tx queue */
 538         txq = &priv->txq[txq_id];
 539         q = &txq->q;
 540
 541         if ((iwl_queue_space(q) < q->high_mark))
 542                 goto drop;
 543
 544         spin_lock_irqsave(&priv->lock, flags);
 545
 546         idx = get_cmd_index(q, q->write_ptr, 0);
 547
 548         /* Set up driver data for this TFD */
 549         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 550         txq->txb[q->write_ptr].skb[0] = skb;
 551
 552         /* Init first empty entry in queue's array of Tx/cmd buffers */
 553         out_cmd = txq->cmd[idx];
 554         out_meta = &txq->meta[idx];
 555         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 556         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 557         memset(tx_cmd, 0, sizeof(*tx_cmd));
 558
 559         /*
 560          * Set up the Tx-command (not MAC!) header.
 561          * Store the chosen Tx queue and TFD index within the sequence field;
 562          * after Tx, uCode's Tx response will return this value so driver can
 563          * locate the frame within the tx queue and do post-tx processing.
 564          */
 565         out_cmd->hdr.cmd = REPLY_TX;
 566         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 567                                 INDEX_TO_SEQ(q->write_ptr)));
 568
 569         /* Copy MAC header from skb into command buffer */
 570         memcpy(tx_cmd->hdr, hdr, hdr_len);
 571
 572
 573         if (info->control.hw_key)
 574                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 575
 576         /* TODO need this for burst mode later on */
 577         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 578
 579         /* set is_hcca to 0; it probably will never be implemented */
 580         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 581
 582         /* Total # bytes to be transmitted */
 583         len = (u16)skb->len;
 584         tx_cmd->len = cpu_to_le16(len);
 585
 586         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 587         iwl_update_stats(priv, true, fc, len);
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 589         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 590
 591         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 592                 txq->need_update = 1;
 593                 if (qc)
 594                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 595         } else {
 596                 wait_write_ptr = 1;
 597                 txq->need_update = 0;
 598         }
 599
 600         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 601                      le16_to_cpu(out_cmd->hdr.sequence));
 602         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 603         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 604         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 605                            ieee80211_hdrlen(fc));
 606
 607         /*
 608          * Use the first empty entry in this queue's command buffer array
 609          * to contain the Tx command and MAC header concatenated together
 610          * (payload data will be in another buffer).
 611          * Size of this varies, due to varying MAC header length.
 612          * If end is not dword aligned, we'll have 2 extra bytes at the end
 613          * of the MAC header (device reads on dword boundaries).
 614          * We'll tell device about this padding later.
 615          */
 616         len = sizeof(struct iwl3945_tx_cmd) +
 617                         sizeof(struct iwl_cmd_header) + hdr_len;
 618
 619         len_org = len;
 620         len = (len + 3) & ~3;
 621
 622         if (len_org != len)
 623                 len_org = 1;
 624         else
 625                 len_org = 0;
 626
 627         /* Physical address of this Tx command's header (not MAC header!),
 628          * within command buffer array. */
 629         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 630                                     len, PCI_DMA_TODEVICE);
 631         /* we do not map meta data ... so we can safely access address to
 632          * provide to unmap command*/
 633         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 634         pci_unmap_len_set(out_meta, len, len);
 635
 636         /* Add buffer containing Tx command and MAC(!) header to TFD's
 637          * first entry */
 638         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 639                                                    txcmd_phys, len, 1, 0);
 640
 641
 642         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 643          * if any (802.11 null frames have no payload). */
 644         len = skb->len - hdr_len;
 645         if (len) {
 646                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 647                                            len, PCI_DMA_TODEVICE);
 648                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 649                                                            phys_addr, len,
 650                                                            0, U32_PAD(len));
 651         }
 652
 653
 654         /* Tell device the write index *just past* this latest filled TFD */
 655         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 656         iwl_txq_update_write_ptr(priv, txq);
 657         spin_unlock_irqrestore(&priv->lock, flags);
 658
 659         if ((iwl_queue_space(q) < q->high_mark)
 660             && priv->mac80211_registered) {
 661                 if (wait_write_ptr) {
 662                         spin_lock_irqsave(&priv->lock, flags);
 663                         txq->need_update = 1;
 664                         iwl_txq_update_write_ptr(priv, txq);
 665                         spin_unlock_irqrestore(&priv->lock, flags);
 666                 }
 667
 668                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 669         }
 670
 671         return 0;
 672
 673 drop_unlock:
 674         spin_unlock_irqrestore(&priv->lock, flags);
 675 drop:
 676         return -1;
 677 }
 678
 679 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 680 #define BEACON_TIME_MASK_HIGH   0xFF000000
 681 #define TIME_UNIT               1024
 682
 683 /*
 684  * extended beacon time format
 685  * time in usec will be changed into a 32-bit value in 8:24 format
 686  * the high 1 byte is the beacon counts
 687  * the lower 3 bytes is the time in usec within one beacon interval
 688  */
 689
 690 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 691 {
 692         u32 quot;
 693         u32 rem;
 694         u32 interval = beacon_interval * 1024;
 695
 696         if (!interval || !usec)
 697                 return 0;
 698
 699         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 700         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 701
 702         return (quot << 24) + rem;
 703 }
 704
 705 /* base is usually what we get from ucode with each received frame,
 706  * the same as HW timer counter counting down
 707  */
 708
 709 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 710 {
 711         u32 base_low = base & BEACON_TIME_MASK_LOW;
 712         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 713         u32 interval = beacon_interval * TIME_UNIT;
 714         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 715             (addon & BEACON_TIME_MASK_HIGH);
 716
 717         if (base_low > addon_low)
 718                 res += base_low - addon_low;
 719         else if (base_low < addon_low) {
 720                 res += interval + base_low - addon_low;
 721                 res += (1 << 24);
 722         } else
 723                 res += (1 << 24);
 724
 725         return cpu_to_le32(res);
 726 }
 727
 728 static int iwl3945_get_measurement(struct iwl_priv *priv,
 729                                struct ieee80211_measurement_params *params,
 730                                u8 type)
 731 {
 732         struct iwl_spectrum_cmd spectrum;
 733         struct iwl_rx_packet *pkt;
 734         struct iwl_host_cmd cmd = {
 735                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 736                 .data = (void *)&spectrum,
 737                 .flags = CMD_WANT_SKB,
 738         };
 739         u32 add_time = le64_to_cpu(params->start_time);
 740         int rc;
 741         int spectrum_resp_status;
 742         int duration = le16_to_cpu(params->duration);
 743
 744         if (iwl_is_associated(priv))
 745                 add_time =
 746                     iwl3945_usecs_to_beacons(
 747                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 748                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 749
 750         memset(&spectrum, 0, sizeof(spectrum));
 751
 752         spectrum.channel_count = cpu_to_le16(1);
 753         spectrum.flags =
 754             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 755         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 756         cmd.len = sizeof(spectrum);
 757         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 758
 759         if (iwl_is_associated(priv))
 760                 spectrum.start_time =
 761                     iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
 762                                 add_time,
 763                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 764         else
 765                 spectrum.start_time = 0;
 766
 767         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 768         spectrum.channels[0].channel = params->channel;
 769         spectrum.channels[0].type = type;
 770         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 771                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 772                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 773
 774         rc = iwl_send_cmd_sync(priv, &cmd);
 775         if (rc)
 776                 return rc;
 777
 778         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 779         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 780                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 781                 rc = -EIO;
 782         }
 783
 784         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 785         switch (spectrum_resp_status) {
 786         case 0:         /* Command will be handled */
 787                 if (pkt->u.spectrum.id != 0xff) {
 788                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 789                                                 pkt->u.spectrum.id);
 790                         priv->measurement_status &= ~MEASUREMENT_READY;
 791                 }
 792                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 793                 rc = 0;
 794                 break;
 795
 796         case 1:         /* Command will not be handled */
 797                 rc = -EAGAIN;
 798                 break;
 799         }
 800
 801         iwl_free_pages(priv, cmd.reply_page);
 802
 803         return rc;
 804 }
 805
 806 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 807                                struct iwl_rx_mem_buffer *rxb)
 808 {
 809         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 810         struct iwl_alive_resp *palive;
 811         struct delayed_work *pwork;
 812
 813         palive = &pkt->u.alive_frame;
 814
 815         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 816                        "0x%01X 0x%01X\n",
 817                        palive->is_valid, palive->ver_type,
 818                        palive->ver_subtype);
 819
 820         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 821                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 822                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 823                        sizeof(struct iwl_alive_resp));
 824                 pwork = &priv->init_alive_start;
 825         } else {
 826                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 827                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 828                        sizeof(struct iwl_alive_resp));
 829                 pwork = &priv->alive_start;
 830                 iwl3945_disable_events(priv);
 831         }
 832
 833         /* We delay the ALIVE response by 5ms to
 834          * give the HW RF Kill time to activate... */
 835         if (palive->is_valid == UCODE_VALID_OK)
 836                 queue_delayed_work(priv->workqueue, pwork,
 837                                    msecs_to_jiffies(5));
 838         else
 839                 IWL_WARN(priv, "uCode did not respond OK.\n");
 840 }
 841
 842 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 843                                  struct iwl_rx_mem_buffer *rxb)
 844 {
 845 #ifdef CONFIG_IWLWIFI_DEBUG
 846         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 847 #endif
 848
 849         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 850         return;
 851 }
 852
 853 static void iwl3945_bg_beacon_update(struct work_struct *work)
 854 {
 855         struct iwl_priv *priv =
 856                 container_of(work, struct iwl_priv, beacon_update);
 857         struct sk_buff *beacon;
 858
 859         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 860         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 861
 862         if (!beacon) {
 863                 IWL_ERR(priv, "update beacon failed\n");
 864                 return;
 865         }
 866
 867         mutex_lock(&priv->mutex);
 868         /* new beacon skb is allocated every time; dispose previous.*/
 869         if (priv->ibss_beacon)
 870                 dev_kfree_skb(priv->ibss_beacon);
 871
 872         priv->ibss_beacon = beacon;
 873         mutex_unlock(&priv->mutex);
 874
 875         iwl3945_send_beacon_cmd(priv);
 876 }
 877
 878 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 879                                 struct iwl_rx_mem_buffer *rxb)
 880 {
 881 #ifdef CONFIG_IWLWIFI_DEBUG
 882         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 883         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 884         u8 rate = beacon->beacon_notify_hdr.rate;
 885
 886         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 887                 "tsf %d %d rate %d\n",
 888                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 889                 beacon->beacon_notify_hdr.failure_frame,
 890                 le32_to_cpu(beacon->ibss_mgr_status),
 891                 le32_to_cpu(beacon->high_tsf),
 892                 le32_to_cpu(beacon->low_tsf), rate);
 893 #endif
 894
 895         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 896             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 897                 queue_work(priv->workqueue, &priv->beacon_update);
 898 }
 899
 900 /* Handle notification from uCode that card's power state is changing
 901  * due to software, hardware, or critical temperature RFKILL */
 902 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 903                                     struct iwl_rx_mem_buffer *rxb)
 904 {
 905         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 906         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 907         unsigned long status = priv->status;
 908
 909         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 910                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 911                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 912
 913         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 914                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 915
 916         if (flags & HW_CARD_DISABLED)
 917                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 918         else
 919                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 920
 921
 922         iwl_scan_cancel(priv);
 923
 924         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 925              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 926                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 927                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 928         else
 929                 wake_up_interruptible(&priv->wait_command_queue);
 930 }
 931
 932 /**
 933  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 934  *
 935  * Setup the RX handlers for each of the reply types sent from the uCode
 936  * to the host.
 937  *
 938  * This function chains into the hardware specific files for them to setup
 939  * any hardware specific handlers as well.
 940  */
 941 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 942 {
 943         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 944         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 945         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 946         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 947         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 948                         iwl_rx_spectrum_measure_notif;
 949         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 950         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 951             iwl_rx_pm_debug_statistics_notif;
 952         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 953
 954         /*
 955          * The same handler is used for both the REPLY to a discrete
 956          * statistics request from the host as well as for the periodic
 957          * statistics notifications (after received beacons) from the uCode.
 958          */
 959         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 960         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 961
 962         iwl_setup_rx_scan_handlers(priv);
 963         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 964
 965         /* Set up hardware specific Rx handlers */
 966         iwl3945_hw_rx_handler_setup(priv);
 967 }
 968
 969 /************************** RX-FUNCTIONS ****************************/
 970 /*
 971  * Rx theory of operation
 972  *
 973  * The host allocates 32 DMA target addresses and passes the host address
 974  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 975  * 0 to 31
 976  *
 977  * Rx Queue Indexes
 978  * The host/firmware share two index registers for managing the Rx buffers.
 979  *
 980  * The READ index maps to the first position that the firmware may be writing
 981  * to -- the driver can read up to (but not including) this position and get
 982  * good data.
 983  * The READ index is managed by the firmware once the card is enabled.
 984  *
 985  * The WRITE index maps to the last position the driver has read from -- the
 986  * position preceding WRITE is the last slot the firmware can place a packet.
 987  *
 988  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 989  * WRITE = READ.
 990  *
 991  * During initialization, the host sets up the READ queue position to the first
 992  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 993  *
 994  * When the firmware places a packet in a buffer, it will advance the READ index
 995  * and fire the RX interrupt.  The driver can then query the READ index and
 996  * process as many packets as possible, moving the WRITE index forward as it
 997  * resets the Rx queue buffers with new memory.
 998  *
 999  * The management in the driver is as follows:
1000  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1001  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1002  *   to replenish the iwl->rxq->rx_free.
1003  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1004  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1005  *   'processed' and 'read' driver indexes as well)
1006  * + A received packet is processed and handed to the kernel network stack,
1007  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1008  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1009  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1010  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1011  *   were enough free buffers and RX_STALLED is set it is cleared.
1012  *
1013  *
1014  * Driver sequence:
1015  *
1016  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1017  *                            iwl3945_rx_queue_restock
1018  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1019  *                            queue, updates firmware pointers, and updates
1020  *                            the WRITE index.  If insufficient rx_free buffers
1021  *                            are available, schedules iwl3945_rx_replenish
1022  *
1023  * -- enable interrupts --
1024  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1025  *                            READ INDEX, detaching the SKB from the pool.
1026  *                            Moves the packet buffer from queue to rx_used.
1027  *                            Calls iwl3945_rx_queue_restock to refill any empty
1028  *                            slots.
1029  * ...
1030  *
1031  */
1032
1033 /**
1034  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1035  */
1036 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1037                                           dma_addr_t dma_addr)
1038 {
1039         return cpu_to_le32((u32)dma_addr);
1040 }
1041
1042 /**
1043  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1044  *
1045  * If there are slots in the RX queue that need to be restocked,
1046  * and we have free pre-allocated buffers, fill the ranks as much
1047  * as we can, pulling from rx_free.
1048  *
1049  * This moves the 'write' index forward to catch up with 'processed', and
1050  * also updates the memory address in the firmware to reference the new
1051  * target buffer.
1052  */
1053 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1054 {
1055         struct iwl_rx_queue *rxq = &priv->rxq;
1056         struct list_head *element;
1057         struct iwl_rx_mem_buffer *rxb;
1058         unsigned long flags;
1059         int write;
1060
1061         spin_lock_irqsave(&rxq->lock, flags);
1062         write = rxq->write & ~0x7;
1063         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1064                 /* Get next free Rx buffer, remove from free list */
1065                 element = rxq->rx_free.next;
1066                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1067                 list_del(element);
1068
1069                 /* Point to Rx buffer via next RBD in circular buffer */
1070                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1071                 rxq->queue[rxq->write] = rxb;
1072                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1073                 rxq->free_count--;
1074         }
1075         spin_unlock_irqrestore(&rxq->lock, flags);
1076         /* If the pre-allocated buffer pool is dropping low, schedule to
1077          * refill it */
1078         if (rxq->free_count <= RX_LOW_WATERMARK)
1079                 queue_work(priv->workqueue, &priv->rx_replenish);
1080
1081
1082         /* If we've added more space for the firmware to place data, tell it.
1083          * Increment device's write pointer in multiples of 8. */
1084         if ((rxq->write_actual != (rxq->write & ~0x7))
1085             || (abs(rxq->write - rxq->read) > 7)) {
1086                 spin_lock_irqsave(&rxq->lock, flags);
1087                 rxq->need_update = 1;
1088                 spin_unlock_irqrestore(&rxq->lock, flags);
1089                 iwl_rx_queue_update_write_ptr(priv, rxq);
1090         }
1091 }
1092
1093 /**
1094  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1095  *
1096  * When moving to rx_free an SKB is allocated for the slot.
1097  *
1098  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1099  * This is called as a scheduled work item (except for during initialization)
1100  */
1101 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1102 {
1103         struct iwl_rx_queue *rxq = &priv->rxq;
1104         struct list_head *element;
1105         struct iwl_rx_mem_buffer *rxb;
1106         struct page *page;
1107         unsigned long flags;
1108         gfp_t gfp_mask = priority;
1109
1110         while (1) {
1111                 spin_lock_irqsave(&rxq->lock, flags);
1112
1113                 if (list_empty(&rxq->rx_used)) {
1114                         spin_unlock_irqrestore(&rxq->lock, flags);
1115                         return;
1116                 }
1117                 spin_unlock_irqrestore(&rxq->lock, flags);
1118
1119                 if (rxq->free_count > RX_LOW_WATERMARK)
1120                         gfp_mask |= __GFP_NOWARN;
1121
1122                 if (priv->hw_params.rx_page_order > 0)
1123                         gfp_mask |= __GFP_COMP;
1124
1125                 /* Alloc a new receive buffer */
1126                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1127                 if (!page) {
1128                         if (net_ratelimit())
1129                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1130                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1131                             net_ratelimit())
1132                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1133                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1134                                          rxq->free_count);
1135                         /* We don't reschedule replenish work here -- we will
1136                          * call the restock method and if it still needs
1137                          * more buffers it will schedule replenish */
1138                         break;
1139                 }
1140
1141                 spin_lock_irqsave(&rxq->lock, flags);
1142                 if (list_empty(&rxq->rx_used)) {
1143                         spin_unlock_irqrestore(&rxq->lock, flags);
1144                         __free_pages(page, priv->hw_params.rx_page_order);
1145                         return;
1146                 }
1147                 element = rxq->rx_used.next;
1148                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1149                 list_del(element);
1150                 spin_unlock_irqrestore(&rxq->lock, flags);
1151
1152                 rxb->page = page;
1153                 /* Get physical address of RB/SKB */
1154                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1155                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1156                                 PCI_DMA_FROMDEVICE);
1157
1158                 spin_lock_irqsave(&rxq->lock, flags);
1159
1160                 list_add_tail(&rxb->list, &rxq->rx_free);
1161                 rxq->free_count++;
1162                 priv->alloc_rxb_page++;
1163
1164                 spin_unlock_irqrestore(&rxq->lock, flags);
1165         }
1166 }
1167
1168 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1169 {
1170         unsigned long flags;
1171         int i;
1172         spin_lock_irqsave(&rxq->lock, flags);
1173         INIT_LIST_HEAD(&rxq->rx_free);
1174         INIT_LIST_HEAD(&rxq->rx_used);
1175         /* Fill the rx_used queue with _all_ of the Rx buffers */
1176         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1177                 /* In the reset function, these buffers may have been allocated
1178                  * to an SKB, so we need to unmap and free potential storage */
1179                 if (rxq->pool[i].page != NULL) {
1180                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1181                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1182                                 PCI_DMA_FROMDEVICE);
1183                         __iwl_free_pages(priv, rxq->pool[i].page);
1184                         rxq->pool[i].page = NULL;
1185                 }
1186                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1187         }
1188
1189         /* Set us so that we have processed and used all buffers, but have
1190          * not restocked the Rx queue with fresh buffers */
1191         rxq->read = rxq->write = 0;
1192         rxq->write_actual = 0;
1193         rxq->free_count = 0;
1194         spin_unlock_irqrestore(&rxq->lock, flags);
1195 }
1196
1197 void iwl3945_rx_replenish(void *data)
1198 {
1199         struct iwl_priv *priv = data;
1200         unsigned long flags;
1201
1202         iwl3945_rx_allocate(priv, GFP_KERNEL);
1203
1204         spin_lock_irqsave(&priv->lock, flags);
1205         iwl3945_rx_queue_restock(priv);
1206         spin_unlock_irqrestore(&priv->lock, flags);
1207 }
1208
1209 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1210 {
1211         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1212
1213         iwl3945_rx_queue_restock(priv);
1214 }
1215
1216
1217 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1218  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1219  * This free routine walks the list of POOL entries and if SKB is set to
1220  * non NULL it is unmapped and freed
1221  */
1222 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1223 {
1224         int i;
1225         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1226                 if (rxq->pool[i].page != NULL) {
1227                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1228                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1229                                 PCI_DMA_FROMDEVICE);
1230                         __iwl_free_pages(priv, rxq->pool[i].page);
1231                         rxq->pool[i].page = NULL;
1232                 }
1233         }
1234
1235         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1236                           rxq->dma_addr);
1237         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1238                           rxq->rb_stts, rxq->rb_stts_dma);
1239         rxq->bd = NULL;
1240         rxq->rb_stts  = NULL;
1241 }
1242
1243
1244 /* Convert linear signal-to-noise ratio into dB */
1245 static u8 ratio2dB[100] = {
1246 /*       0   1   2   3   4   5   6   7   8   9 */
1247          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1248         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1249         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1250         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1251         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1252         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1253         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1254         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1255         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1256         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1257 };
1258
1259 /* Calculates a relative dB value from a ratio of linear
1260  *   (i.e. not dB) signal levels.
1261  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1262 int iwl3945_calc_db_from_ratio(int sig_ratio)
1263 {
1264         /* 1000:1 or higher just report as 60 dB */
1265         if (sig_ratio >= 1000)
1266                 return 60;
1267
1268         /* 100:1 or higher, divide by 10 and use table,
1269          *   add 20 dB to make up for divide by 10 */
1270         if (sig_ratio >= 100)
1271                 return 20 + (int)ratio2dB[sig_ratio/10];
1272
1273         /* We shouldn't see this */
1274         if (sig_ratio < 1)
1275                 return 0;
1276
1277         /* Use table for ratios 1:1 - 99:1 */
1278         return (int)ratio2dB[sig_ratio];
1279 }
1280
1281 /**
1282  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1283  *
1284  * Uses the priv->rx_handlers callback function array to invoke
1285  * the appropriate handlers, including command responses,
1286  * frame-received notifications, and other notifications.
1287  */
1288 static void iwl3945_rx_handle(struct iwl_priv *priv)
1289 {
1290         struct iwl_rx_mem_buffer *rxb;
1291         struct iwl_rx_packet *pkt;
1292         struct iwl_rx_queue *rxq = &priv->rxq;
1293         u32 r, i;
1294         int reclaim;
1295         unsigned long flags;
1296         u8 fill_rx = 0;
1297         u32 count = 8;
1298         int total_empty = 0;
1299
1300         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1301          * buffer that the driver may process (last buffer filled by ucode). */
1302         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1303         i = rxq->read;
1304
1305         /* calculate total frames need to be restock after handling RX */
1306         total_empty = r - rxq->write_actual;
1307         if (total_empty < 0)
1308                 total_empty += RX_QUEUE_SIZE;
1309
1310         if (total_empty > (RX_QUEUE_SIZE / 2))
1311                 fill_rx = 1;
1312         /* Rx interrupt, but nothing sent from uCode */
1313         if (i == r)
1314                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1315
1316         while (i != r) {
1317                 rxb = rxq->queue[i];
1318
1319                 /* If an RXB doesn't have a Rx queue slot associated with it,
1320                  * then a bug has been introduced in the queue refilling
1321                  * routines -- catch it here */
1322                 BUG_ON(rxb == NULL);
1323
1324                 rxq->queue[i] = NULL;
1325
1326                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1327                                PAGE_SIZE << priv->hw_params.rx_page_order,
1328                                PCI_DMA_FROMDEVICE);
1329                 pkt = rxb_addr(rxb);
1330
1331                 trace_iwlwifi_dev_rx(priv, pkt,
1332                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1333
1334                 /* Reclaim a command buffer only if this packet is a response
1335                  *   to a (driver-originated) command.
1336                  * If the packet (e.g. Rx frame) originated from uCode,
1337                  *   there is no command buffer to reclaim.
1338                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1339                  *   but apparently a few don't get set; catch them here. */
1340                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1341                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1342                         (pkt->hdr.cmd != REPLY_TX);
1343
1344                 /* Based on type of command response or notification,
1345                  *   handle those that need handling via function in
1346                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1347                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1348                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1349                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1350                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1351                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1352                 } else {
1353                         /* No handling needed */
1354                         IWL_DEBUG_RX(priv,
1355                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1356                                 r, i, get_cmd_string(pkt->hdr.cmd),
1357                                 pkt->hdr.cmd);
1358                 }
1359
1360                 /*
1361                  * XXX: After here, we should always check rxb->page
1362                  * against NULL before touching it or its virtual
1363                  * memory (pkt). Because some rx_handler might have
1364                  * already taken or freed the pages.
1365                  */
1366
1367                 if (reclaim) {
1368                         /* Invoke any callbacks, transfer the buffer to caller,
1369                          * and fire off the (possibly) blocking iwl_send_cmd()
1370                          * as we reclaim the driver command queue */
1371                         if (rxb->page)
1372                                 iwl_tx_cmd_complete(priv, rxb);
1373                         else
1374                                 IWL_WARN(priv, "Claim null rxb?\n");
1375                 }
1376
1377                 /* Reuse the page if possible. For notification packets and
1378                  * SKBs that fail to Rx correctly, add them back into the
1379                  * rx_free list for reuse later. */
1380                 spin_lock_irqsave(&rxq->lock, flags);
1381                 if (rxb->page != NULL) {
1382                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1383                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1384                                 PCI_DMA_FROMDEVICE);
1385                         list_add_tail(&rxb->list, &rxq->rx_free);
1386                         rxq->free_count++;
1387                 } else
1388                         list_add_tail(&rxb->list, &rxq->rx_used);
1389
1390                 spin_unlock_irqrestore(&rxq->lock, flags);
1391
1392                 i = (i + 1) & RX_QUEUE_MASK;
1393                 /* If there are a lot of unused frames,
1394                  * restock the Rx queue so ucode won't assert. */
1395                 if (fill_rx) {
1396                         count++;
1397                         if (count >= 8) {
1398                                 rxq->read = i;
1399                                 iwl3945_rx_replenish_now(priv);
1400                                 count = 0;
1401                         }
1402                 }
1403         }
1404
1405         /* Backtrack one entry */
1406         rxq->read = i;
1407         if (fill_rx)
1408                 iwl3945_rx_replenish_now(priv);
1409         else
1410                 iwl3945_rx_queue_restock(priv);
1411 }
1412
1413 /* call this function to flush any scheduled tasklet */
1414 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1415 {
1416         /* wait to make sure we flush pending tasklet*/
1417         synchronize_irq(priv->pci_dev->irq);
1418         tasklet_kill(&priv->irq_tasklet);
1419 }
1420
1421 static const char *desc_lookup(int i)
1422 {
1423         switch (i) {
1424         case 1:
1425                 return "FAIL";
1426         case 2:
1427                 return "BAD_PARAM";
1428         case 3:
1429                 return "BAD_CHECKSUM";
1430         case 4:
1431                 return "NMI_INTERRUPT";
1432         case 5:
1433                 return "SYSASSERT";
1434         case 6:
1435                 return "FATAL_ERROR";
1436         }
1437
1438         return "UNKNOWN";
1439 }
1440
1441 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1442 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1443
1444 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1445 {
1446         u32 i;
1447         u32 desc, time, count, base, data1;
1448         u32 blink1, blink2, ilink1, ilink2;
1449
1450         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1451
1452         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1453                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1454                 return;
1455         }
1456
1457
1458         count = iwl_read_targ_mem(priv, base);
1459
1460         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1461                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1462                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1463                         priv->status, count);
1464         }
1465
1466         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1467                   "ilink1  nmiPC   Line\n");
1468         for (i = ERROR_START_OFFSET;
1469              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1470              i += ERROR_ELEM_SIZE) {
1471                 desc = iwl_read_targ_mem(priv, base + i);
1472                 time =
1473                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1474                 blink1 =
1475                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1476                 blink2 =
1477                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1478                 ilink1 =
1479                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1480                 ilink2 =
1481                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1482                 data1 =
1483                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1484
1485                 IWL_ERR(priv,
1486                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1487                         desc_lookup(desc), desc, time, blink1, blink2,
1488                         ilink1, ilink2, data1);
1489                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1490                                         0, blink1, blink2, ilink1, ilink2);
1491         }
1492 }
1493
1494 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1495
1496 /**
1497  * iwl3945_print_event_log - Dump error event log to syslog
1498  *
1499  */
1500 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1501                                   u32 num_events, u32 mode,
1502                                   int pos, char **buf, size_t bufsz)
1503 {
1504         u32 i;
1505         u32 base;       /* SRAM byte address of event log header */
1506         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1507         u32 ptr;        /* SRAM byte address of log data */
1508         u32 ev, time, data; /* event log data */
1509         unsigned long reg_flags;
1510
1511         if (num_events == 0)
1512                 return pos;
1513
1514         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1515
1516         if (mode == 0)
1517                 event_size = 2 * sizeof(u32);
1518         else
1519                 event_size = 3 * sizeof(u32);
1520
1521         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1522
1523         /* Make sure device is powered up for SRAM reads */
1524         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1525         iwl_grab_nic_access(priv);
1526
1527         /* Set starting address; reads will auto-increment */
1528         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1529         rmb();
1530
1531         /* "time" is actually "data" for mode 0 (no timestamp).
1532          * place event id # at far right for easier visual parsing. */
1533         for (i = 0; i < num_events; i++) {
1534                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1535                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1536                 if (mode == 0) {
1537                         /* data, ev */
1538                         if (bufsz) {
1539                                 pos += scnprintf(*buf + pos, bufsz - pos,
1540                                                 "0x%08x:%04u\n",
1541                                                 time, ev);
1542                         } else {
1543                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1544                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1545                                                               time, ev);
1546                         }
1547                 } else {
1548                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1549                         if (bufsz) {
1550                                 pos += scnprintf(*buf + pos, bufsz - pos,
1551                                                 "%010u:0x%08x:%04u\n",
1552                                                  time, data, ev);
1553                         } else {
1554                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1555                                         time, data, ev);
1556                                 trace_iwlwifi_dev_ucode_event(priv, time,
1557                                                               data, ev);
1558                         }
1559                 }
1560         }
1561
1562         /* Allow device to power down */
1563         iwl_release_nic_access(priv);
1564         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1565         return pos;
1566 }
1567
1568 /**
1569  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1570  */
1571 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1572                                       u32 num_wraps, u32 next_entry,
1573                                       u32 size, u32 mode,
1574                                       int pos, char **buf, size_t bufsz)
1575 {
1576         /*
1577          * display the newest DEFAULT_LOG_ENTRIES entries
1578          * i.e the entries just before the next ont that uCode would fill.
1579          */
1580         if (num_wraps) {
1581                 if (next_entry < size) {
1582                         pos = iwl3945_print_event_log(priv,
1583                                              capacity - (size - next_entry),
1584                                              size - next_entry, mode,
1585                                              pos, buf, bufsz);
1586                         pos = iwl3945_print_event_log(priv, 0,
1587                                                       next_entry, mode,
1588                                                       pos, buf, bufsz);
1589                 } else
1590                         pos = iwl3945_print_event_log(priv, next_entry - size,
1591                                                       size, mode,
1592                                                       pos, buf, bufsz);
1593         } else {
1594                 if (next_entry < size)
1595                         pos = iwl3945_print_event_log(priv, 0,
1596                                                       next_entry, mode,
1597                                                       pos, buf, bufsz);
1598                 else
1599                         pos = iwl3945_print_event_log(priv, next_entry - size,
1600                                                       size, mode,
1601                                                       pos, buf, bufsz);
1602         }
1603         return pos;
1604 }
1605
1606 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1607 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1608
1609 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1610
1611 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1612                             char **buf, bool display)
1613 {
1614         u32 base;       /* SRAM byte address of event log header */
1615         u32 capacity;   /* event log capacity in # entries */
1616         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1617         u32 num_wraps;  /* # times uCode wrapped to top of log */
1618         u32 next_entry; /* index of next entry to be written by uCode */
1619         u32 size;       /* # entries that we'll print */
1620         int pos = 0;
1621         size_t bufsz = 0;
1622
1623         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1624         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1625                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1626                 return  -EINVAL;
1627         }
1628
1629         /* event log header */
1630         capacity = iwl_read_targ_mem(priv, base);
1631         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1632         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1633         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1634
1635         if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1636                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1637                         capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1638                 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1639         }
1640
1641         if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1642                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1643                         next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1644                 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1645         }
1646
1647         size = num_wraps ? capacity : next_entry;
1648
1649         /* bail out if nothing in log */
1650         if (size == 0) {
1651                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1652                 return pos;
1653         }
1654
1655 #ifdef CONFIG_IWLWIFI_DEBUG
1656         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1657                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1658                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1659 #else
1660         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1661                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1662 #endif
1663
1664         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1665                   size);
1666
1667 #ifdef CONFIG_IWLWIFI_DEBUG
1668         if (display) {
1669                 if (full_log)
1670                         bufsz = capacity * 48;
1671                 else
1672                         bufsz = size * 48;
1673                 *buf = kmalloc(bufsz, GFP_KERNEL);
1674                 if (!*buf)
1675                         return -ENOMEM;
1676         }
1677         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1678                 /* if uCode has wrapped back to top of log,
1679                  * start at the oldest entry,
1680                  * i.e the next one that uCode would fill.
1681                  */
1682                 if (num_wraps)
1683                         pos = iwl3945_print_event_log(priv, next_entry,
1684                                                 capacity - next_entry, mode,
1685                                                 pos, buf, bufsz);
1686
1687                 /* (then/else) start at top of log */
1688                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1689                                               pos, buf, bufsz);
1690         } else
1691                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1692                                                     next_entry, size, mode,
1693                                                     pos, buf, bufsz);
1694 #else
1695         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1696                                             next_entry, size, mode,
1697                                             pos, buf, bufsz);
1698 #endif
1699         return pos;
1700 }
1701
1702 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1703 {
1704         u32 inta, handled = 0;
1705         u32 inta_fh;
1706         unsigned long flags;
1707 #ifdef CONFIG_IWLWIFI_DEBUG
1708         u32 inta_mask;
1709 #endif
1710
1711         spin_lock_irqsave(&priv->lock, flags);
1712
1713         /* Ack/clear/reset pending uCode interrupts.
1714          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1715          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1716         inta = iwl_read32(priv, CSR_INT);
1717         iwl_write32(priv, CSR_INT, inta);
1718
1719         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1720          * Any new interrupts that happen after this, either while we're
1721          * in this tasklet, or later, will show up in next ISR/tasklet. */
1722         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1723         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1724
1725 #ifdef CONFIG_IWLWIFI_DEBUG
1726         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1727                 /* just for debug */
1728                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1729                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1730                               inta, inta_mask, inta_fh);
1731         }
1732 #endif
1733
1734         spin_unlock_irqrestore(&priv->lock, flags);
1735
1736         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1737          * atomic, make sure that inta covers all the interrupts that
1738          * we've discovered, even if FH interrupt came in just after
1739          * reading CSR_INT. */
1740         if (inta_fh & CSR39_FH_INT_RX_MASK)
1741                 inta |= CSR_INT_BIT_FH_RX;
1742         if (inta_fh & CSR39_FH_INT_TX_MASK)
1743                 inta |= CSR_INT_BIT_FH_TX;
1744
1745         /* Now service all interrupt bits discovered above. */
1746         if (inta & CSR_INT_BIT_HW_ERR) {
1747                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1748
1749                 /* Tell the device to stop sending interrupts */
1750                 iwl_disable_interrupts(priv);
1751
1752                 priv->isr_stats.hw++;
1753                 iwl_irq_handle_error(priv);
1754
1755                 handled |= CSR_INT_BIT_HW_ERR;
1756
1757                 return;
1758         }
1759
1760 #ifdef CONFIG_IWLWIFI_DEBUG
1761         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1762                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1763                 if (inta & CSR_INT_BIT_SCD) {
1764                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1765                                       "the frame/frames.\n");
1766                         priv->isr_stats.sch++;
1767                 }
1768
1769                 /* Alive notification via Rx interrupt will do the real work */
1770                 if (inta & CSR_INT_BIT_ALIVE) {
1771                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1772                         priv->isr_stats.alive++;
1773                 }
1774         }
1775 #endif
1776         /* Safely ignore these bits for debug checks below */
1777         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1778
1779         /* Error detected by uCode */
1780         if (inta & CSR_INT_BIT_SW_ERR) {
1781                 IWL_ERR(priv, "Microcode SW error detected. "
1782                         "Restarting 0x%X.\n", inta);
1783                 priv->isr_stats.sw++;
1784                 priv->isr_stats.sw_err = inta;
1785                 iwl_irq_handle_error(priv);
1786                 handled |= CSR_INT_BIT_SW_ERR;
1787         }
1788
1789         /* uCode wakes up after power-down sleep */
1790         if (inta & CSR_INT_BIT_WAKEUP) {
1791                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1792                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1793                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1794                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1795                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1796                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1797                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1798                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1799
1800                 priv->isr_stats.wakeup++;
1801                 handled |= CSR_INT_BIT_WAKEUP;
1802         }
1803
1804         /* All uCode command responses, including Tx command responses,
1805          * Rx "responses" (frame-received notification), and other
1806          * notifications from uCode come through here*/
1807         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1808                 iwl3945_rx_handle(priv);
1809                 priv->isr_stats.rx++;
1810                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1811         }
1812
1813         if (inta & CSR_INT_BIT_FH_TX) {
1814                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1815                 priv->isr_stats.tx++;
1816
1817                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1818                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1819                                         (FH39_SRVC_CHNL), 0x0);
1820                 handled |= CSR_INT_BIT_FH_TX;
1821         }
1822
1823         if (inta & ~handled) {
1824                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1825                 priv->isr_stats.unhandled++;
1826         }
1827
1828         if (inta & ~priv->inta_mask) {
1829                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1830                          inta & ~priv->inta_mask);
1831                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1832         }
1833
1834         /* Re-enable all interrupts */
1835         /* only Re-enable if disabled by irq */
1836         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1837                 iwl_enable_interrupts(priv);
1838
1839 #ifdef CONFIG_IWLWIFI_DEBUG
1840         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1841                 inta = iwl_read32(priv, CSR_INT);
1842                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1843                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1844                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1845                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1846         }
1847 #endif
1848 }
1849
1850 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1851                                          enum ieee80211_band band,
1852                                      u8 is_active, u8 n_probes,
1853                                      struct iwl3945_scan_channel *scan_ch)
1854 {
1855         struct ieee80211_channel *chan;
1856         const struct ieee80211_supported_band *sband;
1857         const struct iwl_channel_info *ch_info;
1858         u16 passive_dwell = 0;
1859         u16 active_dwell = 0;
1860         int added, i;
1861
1862         sband = iwl_get_hw_mode(priv, band);
1863         if (!sband)
1864                 return 0;
1865
1866         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1867         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1868
1869         if (passive_dwell <= active_dwell)
1870                 passive_dwell = active_dwell + 1;
1871
1872         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1873                 chan = priv->scan_request->channels[i];
1874
1875                 if (chan->band != band)
1876                         continue;
1877
1878                 scan_ch->channel = chan->hw_value;
1879
1880                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1881                 if (!is_channel_valid(ch_info)) {
1882                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1883                                        scan_ch->channel);
1884                         continue;
1885                 }
1886
1887                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1888                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1889                 /* If passive , set up for auto-switch
1890                  *  and use long active_dwell time.
1891                  */
1892                 if (!is_active || is_channel_passive(ch_info) ||
1893                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1894                         scan_ch->type = 0;      /* passive */
1895                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1896                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1897                 } else {
1898                         scan_ch->type = 1;      /* active */
1899                 }
1900
1901                 /* Set direct probe bits. These may be used both for active
1902                  * scan channels (probes gets sent right away),
1903                  * or for passive channels (probes get se sent only after
1904                  * hearing clear Rx packet).*/
1905                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1906                         if (n_probes)
1907                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1908                 } else {
1909                         /* uCode v1 does not allow setting direct probe bits on
1910                          * passive channel. */
1911                         if ((scan_ch->type & 1) && n_probes)
1912                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1913                 }
1914
1915                 /* Set txpower levels to defaults */
1916                 scan_ch->tpc.dsp_atten = 110;
1917                 /* scan_pwr_info->tpc.dsp_atten; */
1918
1919                 /*scan_pwr_info->tpc.tx_gain; */
1920                 if (band == IEEE80211_BAND_5GHZ)
1921                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1922                 else {
1923                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1924                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1925                          * power level:
1926                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1927                          */
1928                 }
1929
1930                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1931                                scan_ch->channel,
1932                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1933                                (scan_ch->type & 1) ?
1934                                active_dwell : passive_dwell);
1935
1936                 scan_ch++;
1937                 added++;
1938         }
1939
1940         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1941         return added;
1942 }
1943
1944 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1945                               struct ieee80211_rate *rates)
1946 {
1947         int i;
1948
1949         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1950                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1951                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1952                 rates[i].hw_value_short = i;
1953                 rates[i].flags = 0;
1954                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1955                         /*
1956                          * If CCK != 1M then set short preamble rate flag.
1957                          */
1958                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1959                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1960                 }
1961         }
1962 }
1963
1964 /******************************************************************************
1965  *
1966  * uCode download functions
1967  *
1968  ******************************************************************************/
1969
1970 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1971 {
1972         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1973         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1974         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1975         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1976         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1977         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1978 }
1979
1980 /**
1981  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1982  *     looking at all data.
1983  */
1984 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1985 {
1986         u32 val;
1987         u32 save_len = len;
1988         int rc = 0;
1989         u32 errcnt;
1990
1991         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1992
1993         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1994                                IWL39_RTC_INST_LOWER_BOUND);
1995
1996         errcnt = 0;
1997         for (; len > 0; len -= sizeof(u32), image++) {
1998                 /* read data comes through single port, auto-incr addr */
1999                 /* NOTE: Use the debugless read so we don't flood kernel log
2000                  * if IWL_DL_IO is set */
2001                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2002                 if (val != le32_to_cpu(*image)) {
2003                         IWL_ERR(priv, "uCode INST section is invalid at "
2004                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2005                                   save_len - len, val, le32_to_cpu(*image));
2006                         rc = -EIO;
2007                         errcnt++;
2008                         if (errcnt >= 20)
2009                                 break;
2010                 }
2011         }
2012
2013
2014         if (!errcnt)
2015                 IWL_DEBUG_INFO(priv,
2016                         "ucode image in INSTRUCTION memory is good\n");
2017
2018         return rc;
2019 }
2020
2021
2022 /**
2023  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2024  *   using sample data 100 bytes apart.  If these sample points are good,
2025  *   it's a pretty good bet that everything between them is good, too.
2026  */
2027 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2028 {
2029         u32 val;
2030         int rc = 0;
2031         u32 errcnt = 0;
2032         u32 i;
2033
2034         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2035
2036         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2037                 /* read data comes through single port, auto-incr addr */
2038                 /* NOTE: Use the debugless read so we don't flood kernel log
2039                  * if IWL_DL_IO is set */
2040                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2041                         i + IWL39_RTC_INST_LOWER_BOUND);
2042                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2043                 if (val != le32_to_cpu(*image)) {
2044 #if 0 /* Enable this if you want to see details */
2045                         IWL_ERR(priv, "uCode INST section is invalid at "
2046                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2047                                   i, val, *image);
2048 #endif
2049                         rc = -EIO;
2050                         errcnt++;
2051                         if (errcnt >= 3)
2052                                 break;
2053                 }
2054         }
2055
2056         return rc;
2057 }
2058
2059
2060 /**
2061  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2062  *    and verify its contents
2063  */
2064 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2065 {
2066         __le32 *image;
2067         u32 len;
2068         int rc = 0;
2069
2070         /* Try bootstrap */
2071         image = (__le32 *)priv->ucode_boot.v_addr;
2072         len = priv->ucode_boot.len;
2073         rc = iwl3945_verify_inst_sparse(priv, image, len);
2074         if (rc == 0) {
2075                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2076                 return 0;
2077         }
2078
2079         /* Try initialize */
2080         image = (__le32 *)priv->ucode_init.v_addr;
2081         len = priv->ucode_init.len;
2082         rc = iwl3945_verify_inst_sparse(priv, image, len);
2083         if (rc == 0) {
2084                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2085                 return 0;
2086         }
2087
2088         /* Try runtime/protocol */
2089         image = (__le32 *)priv->ucode_code.v_addr;
2090         len = priv->ucode_code.len;
2091         rc = iwl3945_verify_inst_sparse(priv, image, len);
2092         if (rc == 0) {
2093                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2094                 return 0;
2095         }
2096
2097         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2098
2099         /* Since nothing seems to match, show first several data entries in
2100          * instruction SRAM, so maybe visual inspection will give a clue.
2101          * Selection of bootstrap image (vs. other images) is arbitrary. */
2102         image = (__le32 *)priv->ucode_boot.v_addr;
2103         len = priv->ucode_boot.len;
2104         rc = iwl3945_verify_inst_full(priv, image, len);
2105
2106         return rc;
2107 }
2108
2109 static void iwl3945_nic_start(struct iwl_priv *priv)
2110 {
2111         /* Remove all resets to allow NIC to operate */
2112         iwl_write32(priv, CSR_RESET, 0);
2113 }
2114
2115 /**
2116  * iwl3945_read_ucode - Read uCode images from disk file.
2117  *
2118  * Copy into buffers for card to fetch via bus-mastering
2119  */
2120 static int iwl3945_read_ucode(struct iwl_priv *priv)
2121 {
2122         const struct iwl_ucode_header *ucode;
2123         int ret = -EINVAL, index;
2124         const struct firmware *ucode_raw;
2125         /* firmware file name contains uCode/driver compatibility version */
2126         const char *name_pre = priv->cfg->fw_name_pre;
2127         const unsigned int api_max = priv->cfg->ucode_api_max;
2128         const unsigned int api_min = priv->cfg->ucode_api_min;
2129         char buf[25];
2130         u8 *src;
2131         size_t len;
2132         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2133
2134         /* Ask kernel firmware_class module to get the boot firmware off disk.
2135          * request_firmware() is synchronous, file is in memory on return. */
2136         for (index = api_max; index >= api_min; index--) {
2137                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2138                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2139                 if (ret < 0) {
2140                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2141                                   buf, ret);
2142                         if (ret == -ENOENT)
2143                                 continue;
2144                         else
2145                                 goto error;
2146                 } else {
2147                         if (index < api_max)
2148                                 IWL_ERR(priv, "Loaded firmware %s, "
2149                                         "which is deprecated. "
2150                                         " Please use API v%u instead.\n",
2151                                           buf, api_max);
2152                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2153                                        "(%zd bytes) from disk\n",
2154                                        buf, ucode_raw->size);
2155                         break;
2156                 }
2157         }
2158
2159         if (ret < 0)
2160                 goto error;
2161
2162         /* Make sure that we got at least our header! */
2163         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2164                 IWL_ERR(priv, "File size way too small!\n");
2165                 ret = -EINVAL;
2166                 goto err_release;
2167         }
2168
2169         /* Data from ucode file:  header followed by uCode images */
2170         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2171
2172         priv->ucode_ver = le32_to_cpu(ucode->ver);
2173         api_ver = IWL_UCODE_API(priv->ucode_ver);
2174         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2175         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2176         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2177         init_data_size =
2178                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2179         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2180         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2181
2182         /* api_ver should match the api version forming part of the
2183          * firmware filename ... but we don't check for that and only rely
2184          * on the API version read from firmware header from here on forward */
2185
2186         if (api_ver < api_min || api_ver > api_max) {
2187                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2188                           "Driver supports v%u, firmware is v%u.\n",
2189                           api_max, api_ver);
2190                 priv->ucode_ver = 0;
2191                 ret = -EINVAL;
2192                 goto err_release;
2193         }
2194         if (api_ver != api_max)
2195                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2196                           "got %u. New firmware can be obtained "
2197                           "from http://www.intellinuxwireless.org.\n",
2198                           api_max, api_ver);
2199
2200         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2201                 IWL_UCODE_MAJOR(priv->ucode_ver),
2202                 IWL_UCODE_MINOR(priv->ucode_ver),
2203                 IWL_UCODE_API(priv->ucode_ver),
2204                 IWL_UCODE_SERIAL(priv->ucode_ver));
2205
2206         snprintf(priv->hw->wiphy->fw_version,
2207                  sizeof(priv->hw->wiphy->fw_version),
2208                  "%u.%u.%u.%u",
2209                  IWL_UCODE_MAJOR(priv->ucode_ver),
2210                  IWL_UCODE_MINOR(priv->ucode_ver),
2211                  IWL_UCODE_API(priv->ucode_ver),
2212                  IWL_UCODE_SERIAL(priv->ucode_ver));
2213
2214         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2215                        priv->ucode_ver);
2216         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2217                        inst_size);
2218         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2219                        data_size);
2220         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2221                        init_size);
2222         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2223                        init_data_size);
2224         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2225                        boot_size);
2226
2227
2228         /* Verify size of file vs. image size info in file's header */
2229         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2230                 inst_size + data_size + init_size +
2231                 init_data_size + boot_size) {
2232
2233                 IWL_DEBUG_INFO(priv,
2234                         "uCode file size %zd does not match expected size\n",
2235                         ucode_raw->size);
2236                 ret = -EINVAL;
2237                 goto err_release;
2238         }
2239
2240         /* Verify that uCode images will fit in card's SRAM */
2241         if (inst_size > IWL39_MAX_INST_SIZE) {
2242                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2243                                inst_size);
2244                 ret = -EINVAL;
2245                 goto err_release;
2246         }
2247
2248         if (data_size > IWL39_MAX_DATA_SIZE) {
2249                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2250                                data_size);
2251                 ret = -EINVAL;
2252                 goto err_release;
2253         }
2254         if (init_size > IWL39_MAX_INST_SIZE) {
2255                 IWL_DEBUG_INFO(priv,
2256                                 "uCode init instr len %d too large to fit in\n",
2257                                 init_size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2262                 IWL_DEBUG_INFO(priv,
2263                                 "uCode init data len %d too large to fit in\n",
2264                                 init_data_size);
2265                 ret = -EINVAL;
2266                 goto err_release;
2267         }
2268         if (boot_size > IWL39_MAX_BSM_SIZE) {
2269                 IWL_DEBUG_INFO(priv,
2270                                 "uCode boot instr len %d too large to fit in\n",
2271                                 boot_size);
2272                 ret = -EINVAL;
2273                 goto err_release;
2274         }
2275
2276         /* Allocate ucode buffers for card's bus-master loading ... */
2277
2278         /* Runtime instructions and 2 copies of data:
2279          * 1) unmodified from disk
2280          * 2) backup cache for save/restore during power-downs */
2281         priv->ucode_code.len = inst_size;
2282         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2283
2284         priv->ucode_data.len = data_size;
2285         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2286
2287         priv->ucode_data_backup.len = data_size;
2288         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2289
2290         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2291             !priv->ucode_data_backup.v_addr)
2292                 goto err_pci_alloc;
2293
2294         /* Initialization instructions and data */
2295         if (init_size && init_data_size) {
2296                 priv->ucode_init.len = init_size;
2297                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2298
2299                 priv->ucode_init_data.len = init_data_size;
2300                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2301
2302                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2303                         goto err_pci_alloc;
2304         }
2305
2306         /* Bootstrap (instructions only, no data) */
2307         if (boot_size) {
2308                 priv->ucode_boot.len = boot_size;
2309                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2310
2311                 if (!priv->ucode_boot.v_addr)
2312                         goto err_pci_alloc;
2313         }
2314
2315         /* Copy images into buffers for card's bus-master reads ... */
2316
2317         /* Runtime instructions (first block of data in file) */
2318         len = inst_size;
2319         IWL_DEBUG_INFO(priv,
2320                 "Copying (but not loading) uCode instr len %zd\n", len);
2321         memcpy(priv->ucode_code.v_addr, src, len);
2322         src += len;
2323
2324         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2325                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2326
2327         /* Runtime data (2nd block)
2328          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2329         len = data_size;
2330         IWL_DEBUG_INFO(priv,
2331                 "Copying (but not loading) uCode data len %zd\n", len);
2332         memcpy(priv->ucode_data.v_addr, src, len);
2333         memcpy(priv->ucode_data_backup.v_addr, src, len);
2334         src += len;
2335
2336         /* Initialization instructions (3rd block) */
2337         if (init_size) {
2338                 len = init_size;
2339                 IWL_DEBUG_INFO(priv,
2340                         "Copying (but not loading) init instr len %zd\n", len);
2341                 memcpy(priv->ucode_init.v_addr, src, len);
2342                 src += len;
2343         }
2344
2345         /* Initialization data (4th block) */
2346         if (init_data_size) {
2347                 len = init_data_size;
2348                 IWL_DEBUG_INFO(priv,
2349                         "Copying (but not loading) init data len %zd\n", len);
2350                 memcpy(priv->ucode_init_data.v_addr, src, len);
2351                 src += len;
2352         }
2353
2354         /* Bootstrap instructions (5th block) */
2355         len = boot_size;
2356         IWL_DEBUG_INFO(priv,
2357                 "Copying (but not loading) boot instr len %zd\n", len);
2358         memcpy(priv->ucode_boot.v_addr, src, len);
2359
2360         /* We have our copies now, allow OS release its copies */
2361         release_firmware(ucode_raw);
2362         return 0;
2363
2364  err_pci_alloc:
2365         IWL_ERR(priv, "failed to allocate pci memory\n");
2366         ret = -ENOMEM;
2367         iwl3945_dealloc_ucode_pci(priv);
2368
2369  err_release:
2370         release_firmware(ucode_raw);
2371
2372  error:
2373         return ret;
2374 }
2375
2376
2377 /**
2378  * iwl3945_set_ucode_ptrs - Set uCode address location
2379  *
2380  * Tell initialization uCode where to find runtime uCode.
2381  *
2382  * BSM registers initially contain pointers to initialization uCode.
2383  * We need to replace them to load runtime uCode inst and data,
2384  * and to save runtime data when powering down.
2385  */
2386 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2387 {
2388         dma_addr_t pinst;
2389         dma_addr_t pdata;
2390
2391         /* bits 31:0 for 3945 */
2392         pinst = priv->ucode_code.p_addr;
2393         pdata = priv->ucode_data_backup.p_addr;
2394
2395         /* Tell bootstrap uCode where to find image to load */
2396         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2397         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2398         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2399                                  priv->ucode_data.len);
2400
2401         /* Inst byte count must be last to set up, bit 31 signals uCode
2402          *   that all new ptr/size info is in place */
2403         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2404                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2405
2406         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2407
2408         return 0;
2409 }
2410
2411 /**
2412  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2413  *
2414  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2415  *
2416  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2417  */
2418 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2419 {
2420         /* Check alive response for "valid" sign from uCode */
2421         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2422                 /* We had an error bringing up the hardware, so take it
2423                  * all the way back down so we can try again */
2424                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2425                 goto restart;
2426         }
2427
2428         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2429          * This is a paranoid check, because we would not have gotten the
2430          * "initialize" alive if code weren't properly loaded.  */
2431         if (iwl3945_verify_ucode(priv)) {
2432                 /* Runtime instruction load was bad;
2433                  * take it all the way back down so we can try again */
2434                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2435                 goto restart;
2436         }
2437
2438         /* Send pointers to protocol/runtime uCode image ... init code will
2439          * load and launch runtime uCode, which will send us another "Alive"
2440          * notification. */
2441         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2442         if (iwl3945_set_ucode_ptrs(priv)) {
2443                 /* Runtime instruction load won't happen;
2444                  * take it all the way back down so we can try again */
2445                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2446                 goto restart;
2447         }
2448         return;
2449
2450  restart:
2451         queue_work(priv->workqueue, &priv->restart);
2452 }
2453
2454 /**
2455  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2456  *                   from protocol/runtime uCode (initialization uCode's
2457  *                   Alive gets handled by iwl3945_init_alive_start()).
2458  */
2459 static void iwl3945_alive_start(struct iwl_priv *priv)
2460 {
2461         int thermal_spin = 0;
2462         u32 rfkill;
2463
2464         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2465
2466         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2467                 /* We had an error bringing up the hardware, so take it
2468                  * all the way back down so we can try again */
2469                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2470                 goto restart;
2471         }
2472
2473         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2474          * This is a paranoid check, because we would not have gotten the
2475          * "runtime" alive if code weren't properly loaded.  */
2476         if (iwl3945_verify_ucode(priv)) {
2477                 /* Runtime instruction load was bad;
2478                  * take it all the way back down so we can try again */
2479                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2480                 goto restart;
2481         }
2482
2483         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2484         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2485
2486         if (rfkill & 0x1) {
2487                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2488                 /* if RFKILL is not on, then wait for thermal
2489                  * sensor in adapter to kick in */
2490                 while (iwl3945_hw_get_temperature(priv) == 0) {
2491                         thermal_spin++;
2492                         udelay(10);
2493                 }
2494
2495                 if (thermal_spin)
2496                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2497                                        thermal_spin * 10);
2498         } else
2499                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2500
2501         /* After the ALIVE response, we can send commands to 3945 uCode */
2502         set_bit(STATUS_ALIVE, &priv->status);
2503
2504         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2505                 /* Enable timer to monitor the driver queues */
2506                 mod_timer(&priv->monitor_recover,
2507                         jiffies +
2508                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2509         }
2510
2511         if (iwl_is_rfkill(priv))
2512                 return;
2513
2514         ieee80211_wake_queues(priv->hw);
2515
2516         priv->active_rate = IWL_RATES_MASK;
2517
2518         iwl_power_update_mode(priv, true);
2519
2520         if (iwl_is_associated(priv)) {
2521                 struct iwl3945_rxon_cmd *active_rxon =
2522                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2523
2524                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2525                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2526         } else {
2527                 /* Initialize our rx_config data */
2528                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2529         }
2530
2531         /* Configure Bluetooth device coexistence support */
2532         iwl_send_bt_config(priv);
2533
2534         /* Configure the adapter for unassociated operation */
2535         iwlcore_commit_rxon(priv);
2536
2537         iwl3945_reg_txpower_periodic(priv);
2538
2539         iwl_leds_init(priv);
2540
2541         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2542         set_bit(STATUS_READY, &priv->status);
2543         wake_up_interruptible(&priv->wait_command_queue);
2544
2545         return;
2546
2547  restart:
2548         queue_work(priv->workqueue, &priv->restart);
2549 }
2550
2551 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2552
2553 static void __iwl3945_down(struct iwl_priv *priv)
2554 {
2555         unsigned long flags;
2556         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2557         struct ieee80211_conf *conf = NULL;
2558
2559         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2560
2561         conf = ieee80211_get_hw_conf(priv->hw);
2562
2563         if (!exit_pending)
2564                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2565
2566         /* Station information will now be cleared in device */
2567         iwl_clear_ucode_stations(priv, true);
2568
2569         /* Unblock any waiting calls */
2570         wake_up_interruptible_all(&priv->wait_command_queue);
2571
2572         /* Wipe out the EXIT_PENDING status bit if we are not actually
2573          * exiting the module */
2574         if (!exit_pending)
2575                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2576
2577         /* stop and reset the on-board processor */
2578         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2579
2580         /* tell the device to stop sending interrupts */
2581         spin_lock_irqsave(&priv->lock, flags);
2582         iwl_disable_interrupts(priv);
2583         spin_unlock_irqrestore(&priv->lock, flags);
2584         iwl_synchronize_irq(priv);
2585
2586         if (priv->mac80211_registered)
2587                 ieee80211_stop_queues(priv->hw);
2588
2589         /* If we have not previously called iwl3945_init() then
2590          * clear all bits but the RF Kill bits and return */
2591         if (!iwl_is_init(priv)) {
2592                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2593                                         STATUS_RF_KILL_HW |
2594                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2595                                         STATUS_GEO_CONFIGURED |
2596                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2597                                         STATUS_EXIT_PENDING;
2598                 goto exit;
2599         }
2600
2601         /* ...otherwise clear out all the status bits but the RF Kill
2602          * bit and continue taking the NIC down. */
2603         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2604                                 STATUS_RF_KILL_HW |
2605                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2606                                 STATUS_GEO_CONFIGURED |
2607                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2608                                 STATUS_FW_ERROR |
2609                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2610                                 STATUS_EXIT_PENDING;
2611
2612         iwl3945_hw_txq_ctx_stop(priv);
2613         iwl3945_hw_rxq_stop(priv);
2614
2615         /* Power-down device's busmaster DMA clocks */
2616         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2617         udelay(5);
2618
2619         /* Stop the device, and put it in low power state */
2620         priv->cfg->ops->lib->apm_ops.stop(priv);
2621
2622  exit:
2623         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2624
2625         if (priv->ibss_beacon)
2626                 dev_kfree_skb(priv->ibss_beacon);
2627         priv->ibss_beacon = NULL;
2628
2629         /* clear out any free frames */
2630         iwl3945_clear_free_frames(priv);
2631 }
2632
2633 static void iwl3945_down(struct iwl_priv *priv)
2634 {
2635         mutex_lock(&priv->mutex);
2636         __iwl3945_down(priv);
2637         mutex_unlock(&priv->mutex);
2638
2639         iwl3945_cancel_deferred_work(priv);
2640 }
2641
2642 #define MAX_HW_RESTARTS 5
2643
2644 static int __iwl3945_up(struct iwl_priv *priv)
2645 {
2646         int rc, i;
2647
2648         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2649                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2650                 return -EIO;
2651         }
2652
2653         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2654                 IWL_ERR(priv, "ucode not available for device bring up\n");
2655                 return -EIO;
2656         }
2657
2658         /* If platform's RF_KILL switch is NOT set to KILL */
2659         if (iwl_read32(priv, CSR_GP_CNTRL) &
2660                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2661                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2662         else {
2663                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2664                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2665                 return -ENODEV;
2666         }
2667
2668         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2669
2670         rc = iwl3945_hw_nic_init(priv);
2671         if (rc) {
2672                 IWL_ERR(priv, "Unable to int nic\n");
2673                 return rc;
2674         }
2675
2676         /* make sure rfkill handshake bits are cleared */
2677         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2678         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2679                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2680
2681         /* clear (again), then enable host interrupts */
2682         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2683         iwl_enable_interrupts(priv);
2684
2685         /* really make sure rfkill handshake bits are cleared */
2686         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2687         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2688
2689         /* Copy original ucode data image from disk into backup cache.
2690          * This will be used to initialize the on-board processor's
2691          * data SRAM for a clean start when the runtime program first loads. */
2692         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2693                priv->ucode_data.len);
2694
2695         /* We return success when we resume from suspend and rf_kill is on. */
2696         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2697                 return 0;
2698
2699         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2700
2701                 /* load bootstrap state machine,
2702                  * load bootstrap program into processor's memory,
2703                  * prepare to load the "initialize" uCode */
2704                 rc = priv->cfg->ops->lib->load_ucode(priv);
2705
2706                 if (rc) {
2707                         IWL_ERR(priv,
2708                                 "Unable to set up bootstrap uCode: %d\n", rc);
2709                         continue;
2710                 }
2711
2712                 /* start card; "initialize" will load runtime ucode */
2713                 iwl3945_nic_start(priv);
2714
2715                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2716
2717                 return 0;
2718         }
2719
2720         set_bit(STATUS_EXIT_PENDING, &priv->status);
2721         __iwl3945_down(priv);
2722         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2723
2724         /* tried to restart and config the device for as long as our
2725          * patience could withstand */
2726         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2727         return -EIO;
2728 }
2729
2730
2731 /*****************************************************************************
2732  *
2733  * Workqueue callbacks
2734  *
2735  *****************************************************************************/
2736
2737 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2738 {
2739         struct iwl_priv *priv =
2740             container_of(data, struct iwl_priv, init_alive_start.work);
2741
2742         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2743                 return;
2744
2745         mutex_lock(&priv->mutex);
2746         iwl3945_init_alive_start(priv);
2747         mutex_unlock(&priv->mutex);
2748 }
2749
2750 static void iwl3945_bg_alive_start(struct work_struct *data)
2751 {
2752         struct iwl_priv *priv =
2753             container_of(data, struct iwl_priv, alive_start.work);
2754
2755         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2756                 return;
2757
2758         mutex_lock(&priv->mutex);
2759         iwl3945_alive_start(priv);
2760         mutex_unlock(&priv->mutex);
2761 }
2762
2763 /*
2764  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2765  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2766  * *is* readable even when device has been SW_RESET into low power mode
2767  * (e.g. during RF KILL).
2768  */
2769 static void iwl3945_rfkill_poll(struct work_struct *data)
2770 {
2771         struct iwl_priv *priv =
2772             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2773         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2774         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2775                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2776
2777         if (new_rfkill != old_rfkill) {
2778                 if (new_rfkill)
2779                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2780                 else
2781                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2782
2783                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2784
2785                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2786                                 new_rfkill ? "disable radio" : "enable radio");
2787         }
2788
2789         /* Keep this running, even if radio now enabled.  This will be
2790          * cancelled in mac_start() if system decides to start again */
2791         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2792                            round_jiffies_relative(2 * HZ));
2793
2794 }
2795
2796 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2797 static void iwl3945_bg_request_scan(struct work_struct *data)
2798 {
2799         struct iwl_priv *priv =
2800             container_of(data, struct iwl_priv, request_scan);
2801         struct iwl_host_cmd cmd = {
2802                 .id = REPLY_SCAN_CMD,
2803                 .len = sizeof(struct iwl3945_scan_cmd),
2804                 .flags = CMD_SIZE_HUGE,
2805         };
2806         struct iwl3945_scan_cmd *scan;
2807         struct ieee80211_conf *conf = NULL;
2808         u8 n_probes = 0;
2809         enum ieee80211_band band;
2810         bool is_active = false;
2811
2812         conf = ieee80211_get_hw_conf(priv->hw);
2813
2814         mutex_lock(&priv->mutex);
2815
2816         cancel_delayed_work(&priv->scan_check);
2817
2818         if (!iwl_is_ready(priv)) {
2819                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2820                 goto done;
2821         }
2822
2823         /* Make sure the scan wasn't canceled before this queued work
2824          * was given the chance to run... */
2825         if (!test_bit(STATUS_SCANNING, &priv->status))
2826                 goto done;
2827
2828         /* This should never be called or scheduled if there is currently
2829          * a scan active in the hardware. */
2830         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2831                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2832                                 "Ignoring second request.\n");
2833                 goto done;
2834         }
2835
2836         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2837                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2838                 goto done;
2839         }
2840
2841         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2842                 IWL_DEBUG_HC(priv,
2843                         "Scan request while abort pending. Queuing.\n");
2844                 goto done;
2845         }
2846
2847         if (iwl_is_rfkill(priv)) {
2848                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2849                 goto done;
2850         }
2851
2852         if (!test_bit(STATUS_READY, &priv->status)) {
2853                 IWL_DEBUG_HC(priv,
2854                         "Scan request while uninitialized. Queuing.\n");
2855                 goto done;
2856         }
2857
2858         if (!priv->scan_bands) {
2859                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2860                 goto done;
2861         }
2862
2863         if (!priv->scan) {
2864                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2865                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2866                 if (!priv->scan) {
2867                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2868                         goto done;
2869                 }
2870         }
2871         scan = priv->scan;
2872         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2873
2874         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2875         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2876
2877         if (iwl_is_associated(priv)) {
2878                 u16 interval = 0;
2879                 u32 extra;
2880                 u32 suspend_time = 100;
2881                 u32 scan_suspend_time = 100;
2882                 unsigned long flags;
2883
2884                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2885
2886                 spin_lock_irqsave(&priv->lock, flags);
2887                 interval = priv->beacon_int;
2888                 spin_unlock_irqrestore(&priv->lock, flags);
2889
2890                 scan->suspend_time = 0;
2891                 scan->max_out_time = cpu_to_le32(200 * 1024);
2892                 if (!interval)
2893                         interval = suspend_time;
2894                 /*
2895                  * suspend time format:
2896                  *  0-19: beacon interval in usec (time before exec.)
2897                  * 20-23: 0
2898                  * 24-31: number of beacons (suspend between channels)
2899                  */
2900
2901                 extra = (suspend_time / interval) << 24;
2902                 scan_suspend_time = 0xFF0FFFFF &
2903                     (extra | ((suspend_time % interval) * 1024));
2904
2905                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2906                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2907                                scan_suspend_time, interval);
2908         }
2909
2910         if (priv->is_internal_short_scan) {
2911                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2912         } else if (priv->scan_request->n_ssids) {
2913                 int i, p = 0;
2914                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2915                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2916                         /* always does wildcard anyway */
2917                         if (!priv->scan_request->ssids[i].ssid_len)
2918                                 continue;
2919                         scan->direct_scan[p].id = WLAN_EID_SSID;
2920                         scan->direct_scan[p].len =
2921                                 priv->scan_request->ssids[i].ssid_len;
2922                         memcpy(scan->direct_scan[p].ssid,
2923                                priv->scan_request->ssids[i].ssid,
2924                                priv->scan_request->ssids[i].ssid_len);
2925                         n_probes++;
2926                         p++;
2927                 }
2928                 is_active = true;
2929         } else
2930                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2931
2932         /* We don't build a direct scan probe request; the uCode will do
2933          * that based on the direct_mask added to each channel entry */
2934         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2935         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2936         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2937
2938         /* flags + rate selection */
2939
2940         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2941                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2942                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2943                 scan->good_CRC_th = 0;
2944                 band = IEEE80211_BAND_2GHZ;
2945         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2946                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2947                 /*
2948                  * If active scaning is requested but a certain channel
2949                  * is marked passive, we can do active scanning if we
2950                  * detect transmissions.
2951                  */
2952                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2953                 band = IEEE80211_BAND_5GHZ;
2954         } else {
2955                 IWL_WARN(priv, "Invalid scan band count\n");
2956                 goto done;
2957         }
2958
2959         if (!priv->is_internal_short_scan) {
2960                 scan->tx_cmd.len = cpu_to_le16(
2961                         iwl_fill_probe_req(priv,
2962                                 (struct ieee80211_mgmt *)scan->data,
2963                                 priv->scan_request->ie,
2964                                 priv->scan_request->ie_len,
2965                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2966         } else {
2967                 scan->tx_cmd.len = cpu_to_le16(
2968                         iwl_fill_probe_req(priv,
2969                                 (struct ieee80211_mgmt *)scan->data,
2970                                 NULL, 0,
2971                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2972         }
2973         /* select Rx antennas */
2974         scan->flags |= iwl3945_get_antenna_flags(priv);
2975
2976         if (iwl_is_monitor_mode(priv))
2977                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2978
2979         scan->channel_count =
2980                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2981                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2982
2983         if (scan->channel_count == 0) {
2984                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2985                 goto done;
2986         }
2987
2988         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2989             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2990         cmd.data = scan;
2991         scan->len = cpu_to_le16(cmd.len);
2992
2993         set_bit(STATUS_SCAN_HW, &priv->status);
2994         if (iwl_send_cmd_sync(priv, &cmd))
2995                 goto done;
2996
2997         queue_delayed_work(priv->workqueue, &priv->scan_check,
2998                            IWL_SCAN_CHECK_WATCHDOG);
2999
3000         mutex_unlock(&priv->mutex);
3001         return;
3002
3003  done:
3004         /* can not perform scan make sure we clear scanning
3005          * bits from status so next scan request can be performed.
3006          * if we dont clear scanning status bit here all next scan
3007          * will fail
3008         */
3009         clear_bit(STATUS_SCAN_HW, &priv->status);
3010         clear_bit(STATUS_SCANNING, &priv->status);
3011
3012         /* inform mac80211 scan aborted */
3013         queue_work(priv->workqueue, &priv->scan_completed);
3014         mutex_unlock(&priv->mutex);
3015 }
3016
3017 static void iwl3945_bg_restart(struct work_struct *data)
3018 {
3019         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3020
3021         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3022                 return;
3023
3024         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3025                 mutex_lock(&priv->mutex);
3026                 priv->vif = NULL;
3027                 priv->is_open = 0;
3028                 mutex_unlock(&priv->mutex);
3029                 iwl3945_down(priv);
3030                 ieee80211_restart_hw(priv->hw);
3031         } else {
3032                 iwl3945_down(priv);
3033
3034                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3035                         return;
3036
3037                 mutex_lock(&priv->mutex);
3038                 __iwl3945_up(priv);
3039                 mutex_unlock(&priv->mutex);
3040         }
3041 }
3042
3043 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3044 {
3045         struct iwl_priv *priv =
3046             container_of(data, struct iwl_priv, rx_replenish);
3047
3048         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3049                 return;
3050
3051         mutex_lock(&priv->mutex);
3052         iwl3945_rx_replenish(priv);
3053         mutex_unlock(&priv->mutex);
3054 }
3055
3056 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3057
3058 void iwl3945_post_associate(struct iwl_priv *priv)
3059 {
3060         int rc = 0;
3061         struct ieee80211_conf *conf = NULL;
3062
3063         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3064                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3065                 return;
3066         }
3067
3068
3069         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3070                         priv->assoc_id, priv->active_rxon.bssid_addr);
3071
3072         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3073                 return;
3074
3075         if (!priv->vif || !priv->is_open)
3076                 return;
3077
3078         iwl_scan_cancel_timeout(priv, 200);
3079
3080         conf = ieee80211_get_hw_conf(priv->hw);
3081
3082         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3083         iwlcore_commit_rxon(priv);
3084
3085         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3086         iwl_setup_rxon_timing(priv);
3087         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3088                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3089         if (rc)
3090                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3091                             "Attempting to continue.\n");
3092
3093         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3094
3095         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3096
3097         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3098                         priv->assoc_id, priv->beacon_int);
3099
3100         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3101                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3102         else
3103                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3104
3105         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3106                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3107                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3108                 else
3109                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3110
3111                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3112                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3113
3114         }
3115
3116         iwlcore_commit_rxon(priv);
3117
3118         switch (priv->iw_mode) {
3119         case NL80211_IFTYPE_STATION:
3120                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3121                 break;
3122
3123         case NL80211_IFTYPE_ADHOC:
3124
3125                 priv->assoc_id = 1;
3126                 iwl_add_local_station(priv, priv->bssid, false);
3127                 iwl3945_sync_sta(priv, IWL_STA_ID,
3128                                 (priv->band == IEEE80211_BAND_5GHZ) ?
3129                                 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3130                                  CMD_ASYNC);
3131                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3132
3133                 iwl3945_send_beacon_cmd(priv);
3134
3135                 break;
3136
3137         default:
3138                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3139                            __func__, priv->iw_mode);
3140                 break;
3141         }
3142
3143         /* we have just associated, don't start scan too early */
3144         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3145 }
3146
3147 /*****************************************************************************
3148  *
3149  * mac80211 entry point functions
3150  *
3151  *****************************************************************************/
3152
3153 #define UCODE_READY_TIMEOUT     (2 * HZ)
3154
3155 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3156 {
3157         struct iwl_priv *priv = hw->priv;
3158         int ret;
3159
3160         IWL_DEBUG_MAC80211(priv, "enter\n");
3161
3162         /* we should be verifying the device is ready to be opened */
3163         mutex_lock(&priv->mutex);
3164
3165         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3166          * ucode filename and max sizes are card-specific. */
3167
3168         if (!priv->ucode_code.len) {
3169                 ret = iwl3945_read_ucode(priv);
3170                 if (ret) {
3171                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3172                         mutex_unlock(&priv->mutex);
3173                         goto out_release_irq;
3174                 }
3175         }
3176
3177         ret = __iwl3945_up(priv);
3178
3179         mutex_unlock(&priv->mutex);
3180
3181         if (ret)
3182                 goto out_release_irq;
3183
3184         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3185
3186         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3187          * mac80211 will not be run successfully. */
3188         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3189                         test_bit(STATUS_READY, &priv->status),
3190                         UCODE_READY_TIMEOUT);
3191         if (!ret) {
3192                 if (!test_bit(STATUS_READY, &priv->status)) {
3193                         IWL_ERR(priv,
3194                                 "Wait for START_ALIVE timeout after %dms.\n",
3195                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3196                         ret = -ETIMEDOUT;
3197                         goto out_release_irq;
3198                 }
3199         }
3200
3201         /* ucode is running and will send rfkill notifications,
3202          * no need to poll the killswitch state anymore */
3203         cancel_delayed_work(&priv->_3945.rfkill_poll);
3204
3205         iwl_led_start(priv);
3206
3207         priv->is_open = 1;
3208         IWL_DEBUG_MAC80211(priv, "leave\n");
3209         return 0;
3210
3211 out_release_irq:
3212         priv->is_open = 0;
3213         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3214         return ret;
3215 }
3216
3217 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3218 {
3219         struct iwl_priv *priv = hw->priv;
3220
3221         IWL_DEBUG_MAC80211(priv, "enter\n");
3222
3223         if (!priv->is_open) {
3224                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3225                 return;
3226         }
3227
3228         priv->is_open = 0;
3229
3230         if (iwl_is_ready_rf(priv)) {
3231                 /* stop mac, cancel any scan request and clear
3232                  * RXON_FILTER_ASSOC_MSK BIT
3233                  */
3234                 mutex_lock(&priv->mutex);
3235                 iwl_scan_cancel_timeout(priv, 100);
3236                 mutex_unlock(&priv->mutex);
3237         }
3238
3239         iwl3945_down(priv);
3240
3241         flush_workqueue(priv->workqueue);
3242
3243         /* start polling the killswitch state again */
3244         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3245                            round_jiffies_relative(2 * HZ));
3246
3247         IWL_DEBUG_MAC80211(priv, "leave\n");
3248 }
3249
3250 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3251 {
3252         struct iwl_priv *priv = hw->priv;
3253
3254         IWL_DEBUG_MAC80211(priv, "enter\n");
3255
3256         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3257                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3258
3259         if (iwl3945_tx_skb(priv, skb))
3260                 dev_kfree_skb_any(skb);
3261
3262         IWL_DEBUG_MAC80211(priv, "leave\n");
3263         return NETDEV_TX_OK;
3264 }
3265
3266 void iwl3945_config_ap(struct iwl_priv *priv)
3267 {
3268         int rc = 0;
3269
3270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3271                 return;
3272
3273         /* The following should be done only at AP bring up */
3274         if (!(iwl_is_associated(priv))) {
3275
3276                 /* RXON - unassoc (to set timing command) */
3277                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3278                 iwlcore_commit_rxon(priv);
3279
3280                 /* RXON Timing */
3281                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3282                 iwl_setup_rxon_timing(priv);
3283                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3284                                       sizeof(priv->rxon_timing),
3285                                       &priv->rxon_timing);
3286                 if (rc)
3287                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3288                                         "Attempting to continue.\n");
3289
3290                 /* FIXME: what should be the assoc_id for AP? */
3291                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3292                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3293                         priv->staging_rxon.flags |=
3294                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3295                 else
3296                         priv->staging_rxon.flags &=
3297                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3298
3299                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3300                         if (priv->assoc_capability &
3301                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3302                                 priv->staging_rxon.flags |=
3303                                         RXON_FLG_SHORT_SLOT_MSK;
3304                         else
3305                                 priv->staging_rxon.flags &=
3306                                         ~RXON_FLG_SHORT_SLOT_MSK;
3307
3308                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3309                                 priv->staging_rxon.flags &=
3310                                         ~RXON_FLG_SHORT_SLOT_MSK;
3311                 }
3312                 /* restore RXON assoc */
3313                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3314                 iwlcore_commit_rxon(priv);
3315                 iwl_add_local_station(priv, iwl_bcast_addr, false);
3316         }
3317         iwl3945_send_beacon_cmd(priv);
3318
3319         /* FIXME - we need to add code here to detect a totally new
3320          * configuration, reset the AP, unassoc, rxon timing, assoc,
3321          * clear sta table, add BCAST sta... */
3322 }
3323
3324 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3325                                struct ieee80211_vif *vif,
3326                                struct ieee80211_sta *sta,
3327                                struct ieee80211_key_conf *key)
3328 {
3329         struct iwl_priv *priv = hw->priv;
3330         const u8 *addr;
3331         int ret = 0;
3332         u8 sta_id = IWL_INVALID_STATION;
3333         u8 static_key;
3334
3335         IWL_DEBUG_MAC80211(priv, "enter\n");
3336
3337         if (iwl3945_mod_params.sw_crypto) {
3338                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3339                 return -EOPNOTSUPP;
3340         }
3341
3342         addr = sta ? sta->addr : iwl_bcast_addr;
3343         static_key = !iwl_is_associated(priv);
3344
3345         if (!static_key) {
3346                 sta_id = iwl_find_station(priv, addr);
3347                 if (sta_id == IWL_INVALID_STATION) {
3348                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3349                                             addr);
3350                         return -EINVAL;
3351                 }
3352         }
3353
3354         mutex_lock(&priv->mutex);
3355         iwl_scan_cancel_timeout(priv, 100);
3356
3357         switch (cmd) {
3358         case SET_KEY:
3359                 if (static_key)
3360                         ret = iwl3945_set_static_key(priv, key);
3361                 else
3362                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3363                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3364                 break;
3365         case DISABLE_KEY:
3366                 if (static_key)
3367                         ret = iwl3945_remove_static_key(priv);
3368                 else
3369                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3370                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3371                 break;
3372         default:
3373                 ret = -EINVAL;
3374         }
3375
3376         mutex_unlock(&priv->mutex);
3377         IWL_DEBUG_MAC80211(priv, "leave\n");
3378
3379         return ret;
3380 }
3381
3382 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3383                                struct ieee80211_vif *vif,
3384                                struct ieee80211_sta *sta)
3385 {
3386         struct iwl_priv *priv = hw->priv;
3387         int ret;
3388         bool is_ap = priv->iw_mode == NL80211_IFTYPE_STATION;
3389         u8 sta_id;
3390
3391         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3392                         sta->addr);
3393
3394         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3395                                      &sta_id);
3396         if (ret) {
3397                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3398                         sta->addr, ret);
3399                 /* Should we return success if return code is EEXIST ? */
3400                 return ret;
3401         }
3402
3403         /* Initialize rate scaling */
3404         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3405                        sta->addr);
3406         iwl3945_rs_rate_init(priv, sta, sta_id);
3407
3408         return 0;
3409
3410
3411
3412         return ret;
3413 }
3414 /*****************************************************************************
3415  *
3416  * sysfs attributes
3417  *
3418  *****************************************************************************/
3419
3420 #ifdef CONFIG_IWLWIFI_DEBUG
3421
3422 /*
3423  * The following adds a new attribute to the sysfs representation
3424  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3425  * used for controlling the debug level.
3426  *
3427  * See the level definitions in iwl for details.
3428  *
3429  * The debug_level being managed using sysfs below is a per device debug
3430  * level that is used instead of the global debug level if it (the per
3431  * device debug level) is set.
3432  */
3433 static ssize_t show_debug_level(struct device *d,
3434                                 struct device_attribute *attr, char *buf)
3435 {
3436         struct iwl_priv *priv = dev_get_drvdata(d);
3437         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3438 }
3439 static ssize_t store_debug_level(struct device *d,
3440                                 struct device_attribute *attr,
3441                                  const char *buf, size_t count)
3442 {
3443         struct iwl_priv *priv = dev_get_drvdata(d);
3444         unsigned long val;
3445         int ret;
3446
3447         ret = strict_strtoul(buf, 0, &val);
3448         if (ret)
3449                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3450         else {
3451                 priv->debug_level = val;
3452                 if (iwl_alloc_traffic_mem(priv))
3453                         IWL_ERR(priv,
3454                                 "Not enough memory to generate traffic log\n");
3455         }
3456         return strnlen(buf, count);
3457 }
3458
3459 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3460                         show_debug_level, store_debug_level);
3461
3462 #endif /* CONFIG_IWLWIFI_DEBUG */
3463
3464 static ssize_t show_temperature(struct device *d,
3465                                 struct device_attribute *attr, char *buf)
3466 {
3467         struct iwl_priv *priv = dev_get_drvdata(d);
3468
3469         if (!iwl_is_alive(priv))
3470                 return -EAGAIN;
3471
3472         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3473 }
3474
3475 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3476
3477 static ssize_t show_tx_power(struct device *d,
3478                              struct device_attribute *attr, char *buf)
3479 {
3480         struct iwl_priv *priv = dev_get_drvdata(d);
3481         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3482 }
3483
3484 static ssize_t store_tx_power(struct device *d,
3485                               struct device_attribute *attr,
3486                               const char *buf, size_t count)
3487 {
3488         struct iwl_priv *priv = dev_get_drvdata(d);
3489         char *p = (char *)buf;
3490         u32 val;
3491
3492         val = simple_strtoul(p, &p, 10);
3493         if (p == buf)
3494                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3495         else
3496                 iwl3945_hw_reg_set_txpower(priv, val);
3497
3498         return count;
3499 }
3500
3501 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3502
3503 static ssize_t show_flags(struct device *d,
3504                           struct device_attribute *attr, char *buf)
3505 {
3506         struct iwl_priv *priv = dev_get_drvdata(d);
3507
3508         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3509 }
3510
3511 static ssize_t store_flags(struct device *d,
3512                            struct device_attribute *attr,
3513                            const char *buf, size_t count)
3514 {
3515         struct iwl_priv *priv = dev_get_drvdata(d);
3516         u32 flags = simple_strtoul(buf, NULL, 0);
3517
3518         mutex_lock(&priv->mutex);
3519         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3520                 /* Cancel any currently running scans... */
3521                 if (iwl_scan_cancel_timeout(priv, 100))
3522                         IWL_WARN(priv, "Could not cancel scan.\n");
3523                 else {
3524                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3525                                        flags);
3526                         priv->staging_rxon.flags = cpu_to_le32(flags);
3527                         iwlcore_commit_rxon(priv);
3528                 }
3529         }
3530         mutex_unlock(&priv->mutex);
3531
3532         return count;
3533 }
3534
3535 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3536
3537 static ssize_t show_filter_flags(struct device *d,
3538                                  struct device_attribute *attr, char *buf)
3539 {
3540         struct iwl_priv *priv = dev_get_drvdata(d);
3541
3542         return sprintf(buf, "0x%04X\n",
3543                 le32_to_cpu(priv->active_rxon.filter_flags));
3544 }
3545
3546 static ssize_t store_filter_flags(struct device *d,
3547                                   struct device_attribute *attr,
3548                                   const char *buf, size_t count)
3549 {
3550         struct iwl_priv *priv = dev_get_drvdata(d);
3551         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3552
3553         mutex_lock(&priv->mutex);
3554         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3555                 /* Cancel any currently running scans... */
3556                 if (iwl_scan_cancel_timeout(priv, 100))
3557                         IWL_WARN(priv, "Could not cancel scan.\n");
3558                 else {
3559                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3560                                        "0x%04X\n", filter_flags);
3561                         priv->staging_rxon.filter_flags =
3562                                 cpu_to_le32(filter_flags);
3563                         iwlcore_commit_rxon(priv);
3564                 }
3565         }
3566         mutex_unlock(&priv->mutex);
3567
3568         return count;
3569 }
3570
3571 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3572                    store_filter_flags);
3573
3574 static ssize_t show_measurement(struct device *d,
3575                                 struct device_attribute *attr, char *buf)
3576 {
3577         struct iwl_priv *priv = dev_get_drvdata(d);
3578         struct iwl_spectrum_notification measure_report;
3579         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3580         u8 *data = (u8 *)&measure_report;
3581         unsigned long flags;
3582
3583         spin_lock_irqsave(&priv->lock, flags);
3584         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3585                 spin_unlock_irqrestore(&priv->lock, flags);
3586                 return 0;
3587         }
3588         memcpy(&measure_report, &priv->measure_report, size);
3589         priv->measurement_status = 0;
3590         spin_unlock_irqrestore(&priv->lock, flags);
3591
3592         while (size && (PAGE_SIZE - len)) {
3593                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3594                                    PAGE_SIZE - len, 1);
3595                 len = strlen(buf);
3596                 if (PAGE_SIZE - len)
3597                         buf[len++] = '\n';
3598
3599                 ofs += 16;
3600                 size -= min(size, 16U);
3601         }
3602
3603         return len;
3604 }
3605
3606 static ssize_t store_measurement(struct device *d,
3607                                  struct device_attribute *attr,
3608                                  const char *buf, size_t count)
3609 {
3610         struct iwl_priv *priv = dev_get_drvdata(d);
3611         struct ieee80211_measurement_params params = {
3612                 .channel = le16_to_cpu(priv->active_rxon.channel),
3613                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3614                 .duration = cpu_to_le16(1),
3615         };
3616         u8 type = IWL_MEASURE_BASIC;
3617         u8 buffer[32];
3618         u8 channel;
3619
3620         if (count) {
3621                 char *p = buffer;
3622                 strncpy(buffer, buf, min(sizeof(buffer), count));
3623                 channel = simple_strtoul(p, NULL, 0);
3624                 if (channel)
3625                         params.channel = channel;
3626
3627                 p = buffer;
3628                 while (*p && *p != ' ')
3629                         p++;
3630                 if (*p)
3631                         type = simple_strtoul(p + 1, NULL, 0);
3632         }
3633
3634         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3635                        "channel %d (for '%s')\n", type, params.channel, buf);
3636         iwl3945_get_measurement(priv, &params, type);
3637
3638         return count;
3639 }
3640
3641 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3642                    show_measurement, store_measurement);
3643
3644 static ssize_t store_retry_rate(struct device *d,
3645                                 struct device_attribute *attr,
3646                                 const char *buf, size_t count)
3647 {
3648         struct iwl_priv *priv = dev_get_drvdata(d);
3649
3650         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3651         if (priv->retry_rate <= 0)
3652                 priv->retry_rate = 1;
3653
3654         return count;
3655 }
3656
3657 static ssize_t show_retry_rate(struct device *d,
3658                                struct device_attribute *attr, char *buf)
3659 {
3660         struct iwl_priv *priv = dev_get_drvdata(d);
3661         return sprintf(buf, "%d", priv->retry_rate);
3662 }
3663
3664 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3665                    store_retry_rate);
3666
3667
3668 static ssize_t show_channels(struct device *d,
3669                              struct device_attribute *attr, char *buf)
3670 {
3671         /* all this shit doesn't belong into sysfs anyway */
3672         return 0;
3673 }
3674
3675 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3676
3677 static ssize_t show_statistics(struct device *d,
3678                                struct device_attribute *attr, char *buf)
3679 {
3680         struct iwl_priv *priv = dev_get_drvdata(d);
3681         u32 size = sizeof(struct iwl3945_notif_statistics);
3682         u32 len = 0, ofs = 0;
3683         u8 *data = (u8 *)&priv->_3945.statistics;
3684         int rc = 0;
3685
3686         if (!iwl_is_alive(priv))
3687                 return -EAGAIN;
3688
3689         mutex_lock(&priv->mutex);
3690         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3691         mutex_unlock(&priv->mutex);
3692
3693         if (rc) {
3694                 len = sprintf(buf,
3695                               "Error sending statistics request: 0x%08X\n", rc);
3696                 return len;
3697         }
3698
3699         while (size && (PAGE_SIZE - len)) {
3700                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3701                                    PAGE_SIZE - len, 1);
3702                 len = strlen(buf);
3703                 if (PAGE_SIZE - len)
3704                         buf[len++] = '\n';
3705
3706                 ofs += 16;
3707                 size -= min(size, 16U);
3708         }
3709
3710         return len;
3711 }
3712
3713 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3714
3715 static ssize_t show_antenna(struct device *d,
3716                             struct device_attribute *attr, char *buf)
3717 {
3718         struct iwl_priv *priv = dev_get_drvdata(d);
3719
3720         if (!iwl_is_alive(priv))
3721                 return -EAGAIN;
3722
3723         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3724 }
3725
3726 static ssize_t store_antenna(struct device *d,
3727                              struct device_attribute *attr,
3728                              const char *buf, size_t count)
3729 {
3730         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3731         int ant;
3732
3733         if (count == 0)
3734                 return 0;
3735
3736         if (sscanf(buf, "%1i", &ant) != 1) {
3737                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3738                 return count;
3739         }
3740
3741         if ((ant >= 0) && (ant <= 2)) {
3742                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3743                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3744         } else
3745                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3746
3747
3748         return count;
3749 }
3750
3751 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3752
3753 static ssize_t show_status(struct device *d,
3754                            struct device_attribute *attr, char *buf)
3755 {
3756         struct iwl_priv *priv = dev_get_drvdata(d);
3757         if (!iwl_is_alive(priv))
3758                 return -EAGAIN;
3759         return sprintf(buf, "0x%08x\n", (int)priv->status);
3760 }
3761
3762 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3763
3764 static ssize_t dump_error_log(struct device *d,
3765                               struct device_attribute *attr,
3766                               const char *buf, size_t count)
3767 {
3768         struct iwl_priv *priv = dev_get_drvdata(d);
3769         char *p = (char *)buf;
3770
3771         if (p[0] == '1')
3772                 iwl3945_dump_nic_error_log(priv);
3773
3774         return strnlen(buf, count);
3775 }
3776
3777 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3778
3779 /*****************************************************************************
3780  *
3781  * driver setup and tear down
3782  *
3783  *****************************************************************************/
3784
3785 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3786 {
3787         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3788
3789         init_waitqueue_head(&priv->wait_command_queue);
3790
3791         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3792         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3793         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3794         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3795         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3796         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3797         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3798         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3799         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3800         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3801
3802         iwl3945_hw_setup_deferred_work(priv);
3803
3804         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3805                 init_timer(&priv->monitor_recover);
3806                 priv->monitor_recover.data = (unsigned long)priv;
3807                 priv->monitor_recover.function =
3808                         priv->cfg->ops->lib->recover_from_tx_stall;
3809         }
3810
3811         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3812                      iwl3945_irq_tasklet, (unsigned long)priv);
3813 }
3814
3815 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3816 {
3817         iwl3945_hw_cancel_deferred_work(priv);
3818
3819         cancel_delayed_work_sync(&priv->init_alive_start);
3820         cancel_delayed_work(&priv->scan_check);
3821         cancel_delayed_work(&priv->alive_start);
3822         cancel_work_sync(&priv->beacon_update);
3823         if (priv->cfg->ops->lib->recover_from_tx_stall)
3824                 del_timer_sync(&priv->monitor_recover);
3825 }
3826
3827 static struct attribute *iwl3945_sysfs_entries[] = {
3828         &dev_attr_antenna.attr,
3829         &dev_attr_channels.attr,
3830         &dev_attr_dump_errors.attr,
3831         &dev_attr_flags.attr,
3832         &dev_attr_filter_flags.attr,
3833         &dev_attr_measurement.attr,
3834         &dev_attr_retry_rate.attr,
3835         &dev_attr_statistics.attr,
3836         &dev_attr_status.attr,
3837         &dev_attr_temperature.attr,
3838         &dev_attr_tx_power.attr,
3839 #ifdef CONFIG_IWLWIFI_DEBUG
3840         &dev_attr_debug_level.attr,
3841 #endif
3842         NULL
3843 };
3844
3845 static struct attribute_group iwl3945_attribute_group = {
3846         .name = NULL,           /* put in device directory */
3847         .attrs = iwl3945_sysfs_entries,
3848 };
3849
3850 static struct ieee80211_ops iwl3945_hw_ops = {
3851         .tx = iwl3945_mac_tx,
3852         .start = iwl3945_mac_start,
3853         .stop = iwl3945_mac_stop,
3854         .add_interface = iwl_mac_add_interface,
3855         .remove_interface = iwl_mac_remove_interface,
3856         .config = iwl_mac_config,
3857         .configure_filter = iwl_configure_filter,
3858         .set_key = iwl3945_mac_set_key,
3859         .conf_tx = iwl_mac_conf_tx,
3860         .reset_tsf = iwl_mac_reset_tsf,
3861         .bss_info_changed = iwl_bss_info_changed,
3862         .hw_scan = iwl_mac_hw_scan,
3863         .sta_add = iwl3945_mac_sta_add,
3864         .sta_remove = iwl_mac_sta_remove,
3865 };
3866
3867 static int iwl3945_init_drv(struct iwl_priv *priv)
3868 {
3869         int ret;
3870         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3871
3872         priv->retry_rate = 1;
3873         priv->ibss_beacon = NULL;
3874
3875         spin_lock_init(&priv->sta_lock);
3876         spin_lock_init(&priv->hcmd_lock);
3877
3878         INIT_LIST_HEAD(&priv->free_frames);
3879
3880         mutex_init(&priv->mutex);
3881         mutex_init(&priv->sync_cmd_mutex);
3882
3883         priv->ieee_channels = NULL;
3884         priv->ieee_rates = NULL;
3885         priv->band = IEEE80211_BAND_2GHZ;
3886
3887         priv->iw_mode = NL80211_IFTYPE_STATION;
3888         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3889
3890         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3891
3892         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3893                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3894                          eeprom->version);
3895                 ret = -EINVAL;
3896                 goto err;
3897         }
3898         ret = iwl_init_channel_map(priv);
3899         if (ret) {
3900                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3901                 goto err;
3902         }
3903
3904         /* Set up txpower settings in driver for all channels */
3905         if (iwl3945_txpower_set_from_eeprom(priv)) {
3906                 ret = -EIO;
3907                 goto err_free_channel_map;
3908         }
3909
3910         ret = iwlcore_init_geos(priv);
3911         if (ret) {
3912                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3913                 goto err_free_channel_map;
3914         }
3915         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3916
3917         return 0;
3918
3919 err_free_channel_map:
3920         iwl_free_channel_map(priv);
3921 err:
3922         return ret;
3923 }
3924
3925 static int iwl3945_setup_mac(struct iwl_priv *priv)
3926 {
3927         int ret;
3928         struct ieee80211_hw *hw = priv->hw;
3929
3930         hw->rate_control_algorithm = "iwl-3945-rs";
3931         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3932
3933         /* Tell mac80211 our characteristics */
3934         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3935                     IEEE80211_HW_NOISE_DBM |
3936                     IEEE80211_HW_SPECTRUM_MGMT;
3937
3938         if (!priv->cfg->broken_powersave)
3939                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3940                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3941
3942         hw->wiphy->interface_modes =
3943                 BIT(NL80211_IFTYPE_STATION) |
3944                 BIT(NL80211_IFTYPE_ADHOC);
3945
3946         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3947                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3948
3949         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3950         /* we create the 802.11 header and a zero-length SSID element */
3951         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3952
3953         /* Default value; 4 EDCA QOS priorities */
3954         hw->queues = 4;
3955
3956         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3957                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3958                         &priv->bands[IEEE80211_BAND_2GHZ];
3959
3960         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3961                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3962                         &priv->bands[IEEE80211_BAND_5GHZ];
3963
3964         ret = ieee80211_register_hw(priv->hw);
3965         if (ret) {
3966                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3967                 return ret;
3968         }
3969         priv->mac80211_registered = 1;
3970
3971         return 0;
3972 }
3973
3974 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3975 {
3976         int err = 0;
3977         struct iwl_priv *priv;
3978         struct ieee80211_hw *hw;
3979         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3980         struct iwl3945_eeprom *eeprom;
3981         unsigned long flags;
3982
3983         /***********************
3984          * 1. Allocating HW data
3985          * ********************/
3986
3987         /* mac80211 allocates memory for this device instance, including
3988          *   space for this driver's private structure */
3989         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3990         if (hw == NULL) {
3991                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3992                 err = -ENOMEM;
3993                 goto out;
3994         }
3995         priv = hw->priv;
3996         SET_IEEE80211_DEV(hw, &pdev->dev);
3997
3998         /*
3999          * Disabling hardware scan means that mac80211 will perform scans
4000          * "the hard way", rather than using device's scan.
4001          */
4002         if (iwl3945_mod_params.disable_hw_scan) {
4003                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4004                 iwl3945_hw_ops.hw_scan = NULL;
4005         }
4006
4007
4008         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4009         priv->cfg = cfg;
4010         priv->pci_dev = pdev;
4011         priv->inta_mask = CSR_INI_SET_MASK;
4012
4013 #ifdef CONFIG_IWLWIFI_DEBUG
4014         atomic_set(&priv->restrict_refcnt, 0);
4015 #endif
4016         if (iwl_alloc_traffic_mem(priv))
4017                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4018
4019         /***************************
4020          * 2. Initializing PCI bus
4021          * *************************/
4022         if (pci_enable_device(pdev)) {
4023                 err = -ENODEV;
4024                 goto out_ieee80211_free_hw;
4025         }
4026
4027         pci_set_master(pdev);
4028
4029         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4030         if (!err)
4031                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4032         if (err) {
4033                 IWL_WARN(priv, "No suitable DMA available.\n");
4034                 goto out_pci_disable_device;
4035         }
4036
4037         pci_set_drvdata(pdev, priv);
4038         err = pci_request_regions(pdev, DRV_NAME);
4039         if (err)
4040                 goto out_pci_disable_device;
4041
4042         /***********************
4043          * 3. Read REV Register
4044          * ********************/
4045         priv->hw_base = pci_iomap(pdev, 0, 0);
4046         if (!priv->hw_base) {
4047                 err = -ENODEV;
4048                 goto out_pci_release_regions;
4049         }
4050
4051         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4052                         (unsigned long long) pci_resource_len(pdev, 0));
4053         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4054
4055         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4056          * PCI Tx retries from interfering with C3 CPU state */
4057         pci_write_config_byte(pdev, 0x41, 0x00);
4058
4059         /* these spin locks will be used in apm_ops.init and EEPROM access
4060          * we should init now
4061          */
4062         spin_lock_init(&priv->reg_lock);
4063         spin_lock_init(&priv->lock);
4064
4065         /*
4066          * stop and reset the on-board processor just in case it is in a
4067          * strange state ... like being left stranded by a primary kernel
4068          * and this is now the kdump kernel trying to start up
4069          */
4070         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4071
4072         /***********************
4073          * 4. Read EEPROM
4074          * ********************/
4075
4076         /* Read the EEPROM */
4077         err = iwl_eeprom_init(priv);
4078         if (err) {
4079                 IWL_ERR(priv, "Unable to init EEPROM\n");
4080                 goto out_iounmap;
4081         }
4082         /* MAC Address location in EEPROM same for 3945/4965 */
4083         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4084         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4085         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4086         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4087
4088         /***********************
4089          * 5. Setup HW Constants
4090          * ********************/
4091         /* Device-specific setup */
4092         if (iwl3945_hw_set_hw_params(priv)) {
4093                 IWL_ERR(priv, "failed to set hw settings\n");
4094                 goto out_eeprom_free;
4095         }
4096
4097         /***********************
4098          * 6. Setup priv
4099          * ********************/
4100
4101         err = iwl3945_init_drv(priv);
4102         if (err) {
4103                 IWL_ERR(priv, "initializing driver failed\n");
4104                 goto out_unset_hw_params;
4105         }
4106
4107         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4108                 priv->cfg->name);
4109
4110         /***********************
4111          * 7. Setup Services
4112          * ********************/
4113
4114         spin_lock_irqsave(&priv->lock, flags);
4115         iwl_disable_interrupts(priv);
4116         spin_unlock_irqrestore(&priv->lock, flags);
4117
4118         pci_enable_msi(priv->pci_dev);
4119
4120         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4121                           IRQF_SHARED, DRV_NAME, priv);
4122         if (err) {
4123                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4124                 goto out_disable_msi;
4125         }
4126
4127         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4128         if (err) {
4129                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4130                 goto out_release_irq;
4131         }
4132
4133         iwl_set_rxon_channel(priv,
4134                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4135         iwl3945_setup_deferred_work(priv);
4136         iwl3945_setup_rx_handlers(priv);
4137         iwl_power_initialize(priv);
4138
4139         /*********************************
4140          * 8. Setup and Register mac80211
4141          * *******************************/
4142
4143         iwl_enable_interrupts(priv);
4144
4145         err = iwl3945_setup_mac(priv);
4146         if (err)
4147                 goto  out_remove_sysfs;
4148
4149         err = iwl_dbgfs_register(priv, DRV_NAME);
4150         if (err)
4151                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4152
4153         /* Start monitoring the killswitch */
4154         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4155                            2 * HZ);
4156
4157         return 0;
4158
4159  out_remove_sysfs:
4160         destroy_workqueue(priv->workqueue);
4161         priv->workqueue = NULL;
4162         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4163  out_release_irq:
4164         free_irq(priv->pci_dev->irq, priv);
4165  out_disable_msi:
4166         pci_disable_msi(priv->pci_dev);
4167         iwlcore_free_geos(priv);
4168         iwl_free_channel_map(priv);
4169  out_unset_hw_params:
4170         iwl3945_unset_hw_params(priv);
4171  out_eeprom_free:
4172         iwl_eeprom_free(priv);
4173  out_iounmap:
4174         pci_iounmap(pdev, priv->hw_base);
4175  out_pci_release_regions:
4176         pci_release_regions(pdev);
4177  out_pci_disable_device:
4178         pci_set_drvdata(pdev, NULL);
4179         pci_disable_device(pdev);
4180  out_ieee80211_free_hw:
4181         iwl_free_traffic_mem(priv);
4182         ieee80211_free_hw(priv->hw);
4183  out:
4184         return err;
4185 }
4186
4187 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4188 {
4189         struct iwl_priv *priv = pci_get_drvdata(pdev);
4190         unsigned long flags;
4191
4192         if (!priv)
4193                 return;
4194
4195         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4196
4197         iwl_dbgfs_unregister(priv);
4198
4199         set_bit(STATUS_EXIT_PENDING, &priv->status);
4200
4201         if (priv->mac80211_registered) {
4202                 ieee80211_unregister_hw(priv->hw);
4203                 priv->mac80211_registered = 0;
4204         } else {
4205                 iwl3945_down(priv);
4206         }
4207
4208         /*
4209          * Make sure device is reset to low power before unloading driver.
4210          * This may be redundant with iwl_down(), but there are paths to
4211          * run iwl_down() without calling apm_ops.stop(), and there are
4212          * paths to avoid running iwl_down() at all before leaving driver.
4213          * This (inexpensive) call *makes sure* device is reset.
4214          */
4215         priv->cfg->ops->lib->apm_ops.stop(priv);
4216
4217         /* make sure we flush any pending irq or
4218          * tasklet for the driver
4219          */
4220         spin_lock_irqsave(&priv->lock, flags);
4221         iwl_disable_interrupts(priv);
4222         spin_unlock_irqrestore(&priv->lock, flags);
4223
4224         iwl_synchronize_irq(priv);
4225
4226         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4227
4228         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4229
4230         iwl3945_dealloc_ucode_pci(priv);
4231
4232         if (priv->rxq.bd)
4233                 iwl3945_rx_queue_free(priv, &priv->rxq);
4234         iwl3945_hw_txq_ctx_free(priv);
4235
4236         iwl3945_unset_hw_params(priv);
4237
4238         /*netif_stop_queue(dev); */
4239         flush_workqueue(priv->workqueue);
4240
4241         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4242          * priv->workqueue... so we can't take down the workqueue
4243          * until now... */
4244         destroy_workqueue(priv->workqueue);
4245         priv->workqueue = NULL;
4246         iwl_free_traffic_mem(priv);
4247
4248         free_irq(pdev->irq, priv);
4249         pci_disable_msi(pdev);
4250
4251         pci_iounmap(pdev, priv->hw_base);
4252         pci_release_regions(pdev);
4253         pci_disable_device(pdev);
4254         pci_set_drvdata(pdev, NULL);
4255
4256         iwl_free_channel_map(priv);
4257         iwlcore_free_geos(priv);
4258         kfree(priv->scan);
4259         if (priv->ibss_beacon)
4260                 dev_kfree_skb(priv->ibss_beacon);
4261
4262         ieee80211_free_hw(priv->hw);
4263 }
4264
4265
4266 /*****************************************************************************
4267  *
4268  * driver and module entry point
4269  *
4270  *****************************************************************************/
4271
4272 static struct pci_driver iwl3945_driver = {
4273         .name = DRV_NAME,
4274         .id_table = iwl3945_hw_card_ids,
4275         .probe = iwl3945_pci_probe,
4276         .remove = __devexit_p(iwl3945_pci_remove),
4277 #ifdef CONFIG_PM
4278         .suspend = iwl_pci_suspend,
4279         .resume = iwl_pci_resume,
4280 #endif
4281 };
4282
4283 static int __init iwl3945_init(void)
4284 {
4285
4286         int ret;
4287         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4288         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4289
4290         ret = iwl3945_rate_control_register();
4291         if (ret) {
4292                 printk(KERN_ERR DRV_NAME
4293                        "Unable to register rate control algorithm: %d\n", ret);
4294                 return ret;
4295         }
4296
4297         ret = pci_register_driver(&iwl3945_driver);
4298         if (ret) {
4299                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4300                 goto error_register;
4301         }
4302
4303         return ret;
4304
4305 error_register:
4306         iwl3945_rate_control_unregister();
4307         return ret;
4308 }
4309
4310 static void __exit iwl3945_exit(void)
4311 {
4312         pci_unregister_driver(&iwl3945_driver);
4313         iwl3945_rate_control_unregister();
4314 }
4315
4316 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4317
4318 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4319 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4320 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4321 MODULE_PARM_DESC(swcrypto,
4322                  "using software crypto (default 1 [software])\n");
4323 #ifdef CONFIG_IWLWIFI_DEBUG
4324 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4325 MODULE_PARM_DESC(debug, "debug output mask");
4326 #endif
4327 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4328                    int, S_IRUGO);
4329 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4330 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4331 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4332
4333 module_exit(iwl3945_exit);
4334 module_init(iwl3945_init);