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         __le16 fc;
 477         u8 wait_write_ptr = 0;
 478         unsigned long flags;
 479
 480         spin_lock_irqsave(&priv->lock, flags);
 481         if (iwl_is_rfkill(priv)) {
 482                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 483                 goto drop_unlock;
 484         }
 485
 486         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 487                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 488                 goto drop_unlock;
 489         }
 490
 491         unicast = !is_multicast_ether_addr(hdr->addr1);
 492         id = 0;
 493
 494         fc = hdr->frame_control;
 495
 496 #ifdef CONFIG_IWLWIFI_DEBUG
 497         if (ieee80211_is_auth(fc))
 498                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 499         else if (ieee80211_is_assoc_req(fc))
 500                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 501         else if (ieee80211_is_reassoc_req(fc))
 502                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 503 #endif
 504
 505         spin_unlock_irqrestore(&priv->lock, flags);
 506
 507         hdr_len = ieee80211_hdrlen(fc);
 508
 509         /* Find index into station table for destination station */
 510         sta_id = iwl_sta_id_or_broadcast(priv, info->control.sta);
 511         if (sta_id == IWL_INVALID_STATION) {
 512                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 513                                hdr->addr1);
 514                 goto drop;
 515         }
 516
 517         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 518
 519         if (ieee80211_is_data_qos(fc)) {
 520                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 521                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 522                 if (unlikely(tid >= MAX_TID_COUNT))
 523                         goto drop;
 524         }
 525
 526         /* Descriptor for chosen Tx queue */
 527         txq = &priv->txq[txq_id];
 528         q = &txq->q;
 529
 530         if ((iwl_queue_space(q) < q->high_mark))
 531                 goto drop;
 532
 533         spin_lock_irqsave(&priv->lock, flags);
 534
 535         idx = get_cmd_index(q, q->write_ptr, 0);
 536
 537         /* Set up driver data for this TFD */
 538         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 539         txq->txb[q->write_ptr].skb[0] = skb;
 540
 541         /* Init first empty entry in queue's array of Tx/cmd buffers */
 542         out_cmd = txq->cmd[idx];
 543         out_meta = &txq->meta[idx];
 544         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 545         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 546         memset(tx_cmd, 0, sizeof(*tx_cmd));
 547
 548         /*
 549          * Set up the Tx-command (not MAC!) header.
 550          * Store the chosen Tx queue and TFD index within the sequence field;
 551          * after Tx, uCode's Tx response will return this value so driver can
 552          * locate the frame within the tx queue and do post-tx processing.
 553          */
 554         out_cmd->hdr.cmd = REPLY_TX;
 555         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 556                                 INDEX_TO_SEQ(q->write_ptr)));
 557
 558         /* Copy MAC header from skb into command buffer */
 559         memcpy(tx_cmd->hdr, hdr, hdr_len);
 560
 561
 562         if (info->control.hw_key)
 563                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 564
 565         /* TODO need this for burst mode later on */
 566         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 567
 568         /* set is_hcca to 0; it probably will never be implemented */
 569         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 570
 571         /* Total # bytes to be transmitted */
 572         len = (u16)skb->len;
 573         tx_cmd->len = cpu_to_le16(len);
 574
 575         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 576         iwl_update_stats(priv, true, fc, len);
 577         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 578         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 579
 580         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 581                 txq->need_update = 1;
 582         } else {
 583                 wait_write_ptr = 1;
 584                 txq->need_update = 0;
 585         }
 586
 587         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 588                      le16_to_cpu(out_cmd->hdr.sequence));
 589         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 590         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 591         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 592                            ieee80211_hdrlen(fc));
 593
 594         /*
 595          * Use the first empty entry in this queue's command buffer array
 596          * to contain the Tx command and MAC header concatenated together
 597          * (payload data will be in another buffer).
 598          * Size of this varies, due to varying MAC header length.
 599          * If end is not dword aligned, we'll have 2 extra bytes at the end
 600          * of the MAC header (device reads on dword boundaries).
 601          * We'll tell device about this padding later.
 602          */
 603         len = sizeof(struct iwl3945_tx_cmd) +
 604                         sizeof(struct iwl_cmd_header) + hdr_len;
 605
 606         len_org = len;
 607         len = (len + 3) & ~3;
 608
 609         if (len_org != len)
 610                 len_org = 1;
 611         else
 612                 len_org = 0;
 613
 614         /* Physical address of this Tx command's header (not MAC header!),
 615          * within command buffer array. */
 616         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 617                                     len, PCI_DMA_TODEVICE);
 618         /* we do not map meta data ... so we can safely access address to
 619          * provide to unmap command*/
 620         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 621         pci_unmap_len_set(out_meta, len, len);
 622
 623         /* Add buffer containing Tx command and MAC(!) header to TFD's
 624          * first entry */
 625         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 626                                                    txcmd_phys, len, 1, 0);
 627
 628
 629         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 630          * if any (802.11 null frames have no payload). */
 631         len = skb->len - hdr_len;
 632         if (len) {
 633                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 634                                            len, PCI_DMA_TODEVICE);
 635                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 636                                                            phys_addr, len,
 637                                                            0, U32_PAD(len));
 638         }
 639
 640
 641         /* Tell device the write index *just past* this latest filled TFD */
 642         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 643         iwl_txq_update_write_ptr(priv, txq);
 644         spin_unlock_irqrestore(&priv->lock, flags);
 645
 646         if ((iwl_queue_space(q) < q->high_mark)
 647             && priv->mac80211_registered) {
 648                 if (wait_write_ptr) {
 649                         spin_lock_irqsave(&priv->lock, flags);
 650                         txq->need_update = 1;
 651                         iwl_txq_update_write_ptr(priv, txq);
 652                         spin_unlock_irqrestore(&priv->lock, flags);
 653                 }
 654
 655                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 656         }
 657
 658         return 0;
 659
 660 drop_unlock:
 661         spin_unlock_irqrestore(&priv->lock, flags);
 662 drop:
 663         return -1;
 664 }
 665
 666 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 667 #define BEACON_TIME_MASK_HIGH   0xFF000000
 668 #define TIME_UNIT               1024
 669
 670 /*
 671  * extended beacon time format
 672  * time in usec will be changed into a 32-bit value in 8:24 format
 673  * the high 1 byte is the beacon counts
 674  * the lower 3 bytes is the time in usec within one beacon interval
 675  */
 676
 677 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 678 {
 679         u32 quot;
 680         u32 rem;
 681         u32 interval = beacon_interval * 1024;
 682
 683         if (!interval || !usec)
 684                 return 0;
 685
 686         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 687         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 688
 689         return (quot << 24) + rem;
 690 }
 691
 692 /* base is usually what we get from ucode with each received frame,
 693  * the same as HW timer counter counting down
 694  */
 695
 696 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 697 {
 698         u32 base_low = base & BEACON_TIME_MASK_LOW;
 699         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 700         u32 interval = beacon_interval * TIME_UNIT;
 701         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 702             (addon & BEACON_TIME_MASK_HIGH);
 703
 704         if (base_low > addon_low)
 705                 res += base_low - addon_low;
 706         else if (base_low < addon_low) {
 707                 res += interval + base_low - addon_low;
 708                 res += (1 << 24);
 709         } else
 710                 res += (1 << 24);
 711
 712         return cpu_to_le32(res);
 713 }
 714
 715 static int iwl3945_get_measurement(struct iwl_priv *priv,
 716                                struct ieee80211_measurement_params *params,
 717                                u8 type)
 718 {
 719         struct iwl_spectrum_cmd spectrum;
 720         struct iwl_rx_packet *pkt;
 721         struct iwl_host_cmd cmd = {
 722                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 723                 .data = (void *)&spectrum,
 724                 .flags = CMD_WANT_SKB,
 725         };
 726         u32 add_time = le64_to_cpu(params->start_time);
 727         int rc;
 728         int spectrum_resp_status;
 729         int duration = le16_to_cpu(params->duration);
 730
 731         if (iwl_is_associated(priv))
 732                 add_time =
 733                     iwl3945_usecs_to_beacons(
 734                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 735                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 736
 737         memset(&spectrum, 0, sizeof(spectrum));
 738
 739         spectrum.channel_count = cpu_to_le16(1);
 740         spectrum.flags =
 741             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 742         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 743         cmd.len = sizeof(spectrum);
 744         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 745
 746         if (iwl_is_associated(priv))
 747                 spectrum.start_time =
 748                     iwl3945_add_beacon_time(priv->_3945.last_beacon_time,
 749                                 add_time,
 750                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 751         else
 752                 spectrum.start_time = 0;
 753
 754         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 755         spectrum.channels[0].channel = params->channel;
 756         spectrum.channels[0].type = type;
 757         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 758                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 759                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 760
 761         rc = iwl_send_cmd_sync(priv, &cmd);
 762         if (rc)
 763                 return rc;
 764
 765         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 766         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 767                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 768                 rc = -EIO;
 769         }
 770
 771         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 772         switch (spectrum_resp_status) {
 773         case 0:         /* Command will be handled */
 774                 if (pkt->u.spectrum.id != 0xff) {
 775                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 776                                                 pkt->u.spectrum.id);
 777                         priv->measurement_status &= ~MEASUREMENT_READY;
 778                 }
 779                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 780                 rc = 0;
 781                 break;
 782
 783         case 1:         /* Command will not be handled */
 784                 rc = -EAGAIN;
 785                 break;
 786         }
 787
 788         iwl_free_pages(priv, cmd.reply_page);
 789
 790         return rc;
 791 }
 792
 793 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 794                                struct iwl_rx_mem_buffer *rxb)
 795 {
 796         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 797         struct iwl_alive_resp *palive;
 798         struct delayed_work *pwork;
 799
 800         palive = &pkt->u.alive_frame;
 801
 802         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 803                        "0x%01X 0x%01X\n",
 804                        palive->is_valid, palive->ver_type,
 805                        palive->ver_subtype);
 806
 807         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 808                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 809                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 810                        sizeof(struct iwl_alive_resp));
 811                 pwork = &priv->init_alive_start;
 812         } else {
 813                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 814                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 815                        sizeof(struct iwl_alive_resp));
 816                 pwork = &priv->alive_start;
 817                 iwl3945_disable_events(priv);
 818         }
 819
 820         /* We delay the ALIVE response by 5ms to
 821          * give the HW RF Kill time to activate... */
 822         if (palive->is_valid == UCODE_VALID_OK)
 823                 queue_delayed_work(priv->workqueue, pwork,
 824                                    msecs_to_jiffies(5));
 825         else
 826                 IWL_WARN(priv, "uCode did not respond OK.\n");
 827 }
 828
 829 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 830                                  struct iwl_rx_mem_buffer *rxb)
 831 {
 832 #ifdef CONFIG_IWLWIFI_DEBUG
 833         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 834 #endif
 835
 836         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 837         return;
 838 }
 839
 840 static void iwl3945_bg_beacon_update(struct work_struct *work)
 841 {
 842         struct iwl_priv *priv =
 843                 container_of(work, struct iwl_priv, beacon_update);
 844         struct sk_buff *beacon;
 845
 846         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 847         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 848
 849         if (!beacon) {
 850                 IWL_ERR(priv, "update beacon failed\n");
 851                 return;
 852         }
 853
 854         mutex_lock(&priv->mutex);
 855         /* new beacon skb is allocated every time; dispose previous.*/
 856         if (priv->ibss_beacon)
 857                 dev_kfree_skb(priv->ibss_beacon);
 858
 859         priv->ibss_beacon = beacon;
 860         mutex_unlock(&priv->mutex);
 861
 862         iwl3945_send_beacon_cmd(priv);
 863 }
 864
 865 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 866                                 struct iwl_rx_mem_buffer *rxb)
 867 {
 868 #ifdef CONFIG_IWLWIFI_DEBUG
 869         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 870         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 871         u8 rate = beacon->beacon_notify_hdr.rate;
 872
 873         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 874                 "tsf %d %d rate %d\n",
 875                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 876                 beacon->beacon_notify_hdr.failure_frame,
 877                 le32_to_cpu(beacon->ibss_mgr_status),
 878                 le32_to_cpu(beacon->high_tsf),
 879                 le32_to_cpu(beacon->low_tsf), rate);
 880 #endif
 881
 882         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 883             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 884                 queue_work(priv->workqueue, &priv->beacon_update);
 885 }
 886
 887 /* Handle notification from uCode that card's power state is changing
 888  * due to software, hardware, or critical temperature RFKILL */
 889 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 890                                     struct iwl_rx_mem_buffer *rxb)
 891 {
 892         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 893         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 894         unsigned long status = priv->status;
 895
 896         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 897                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 898                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 899
 900         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 901                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 902
 903         if (flags & HW_CARD_DISABLED)
 904                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 905         else
 906                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 907
 908
 909         iwl_scan_cancel(priv);
 910
 911         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 912              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 913                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 914                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 915         else
 916                 wake_up_interruptible(&priv->wait_command_queue);
 917 }
 918
 919 /**
 920  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 921  *
 922  * Setup the RX handlers for each of the reply types sent from the uCode
 923  * to the host.
 924  *
 925  * This function chains into the hardware specific files for them to setup
 926  * any hardware specific handlers as well.
 927  */
 928 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 929 {
 930         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 931         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 932         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 933         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 934         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 935                         iwl_rx_spectrum_measure_notif;
 936         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 937         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 938             iwl_rx_pm_debug_statistics_notif;
 939         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 940
 941         /*
 942          * The same handler is used for both the REPLY to a discrete
 943          * statistics request from the host as well as for the periodic
 944          * statistics notifications (after received beacons) from the uCode.
 945          */
 946         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 947         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 948
 949         iwl_setup_rx_scan_handlers(priv);
 950         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 951
 952         /* Set up hardware specific Rx handlers */
 953         iwl3945_hw_rx_handler_setup(priv);
 954 }
 955
 956 /************************** RX-FUNCTIONS ****************************/
 957 /*
 958  * Rx theory of operation
 959  *
 960  * The host allocates 32 DMA target addresses and passes the host address
 961  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 962  * 0 to 31
 963  *
 964  * Rx Queue Indexes
 965  * The host/firmware share two index registers for managing the Rx buffers.
 966  *
 967  * The READ index maps to the first position that the firmware may be writing
 968  * to -- the driver can read up to (but not including) this position and get
 969  * good data.
 970  * The READ index is managed by the firmware once the card is enabled.
 971  *
 972  * The WRITE index maps to the last position the driver has read from -- the
 973  * position preceding WRITE is the last slot the firmware can place a packet.
 974  *
 975  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 976  * WRITE = READ.
 977  *
 978  * During initialization, the host sets up the READ queue position to the first
 979  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 980  *
 981  * When the firmware places a packet in a buffer, it will advance the READ index
 982  * and fire the RX interrupt.  The driver can then query the READ index and
 983  * process as many packets as possible, moving the WRITE index forward as it
 984  * resets the Rx queue buffers with new memory.
 985  *
 986  * The management in the driver is as follows:
 987  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 988  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 989  *   to replenish the iwl->rxq->rx_free.
 990  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 991  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 992  *   'processed' and 'read' driver indexes as well)
 993  * + A received packet is processed and handed to the kernel network stack,
 994  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 995  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 996  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 997  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 998  *   were enough free buffers and RX_STALLED is set it is cleared.
 999  *
1000  *
1001  * Driver sequence:
1002  *
1003  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1004  *                            iwl3945_rx_queue_restock
1005  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1006  *                            queue, updates firmware pointers, and updates
1007  *                            the WRITE index.  If insufficient rx_free buffers
1008  *                            are available, schedules iwl3945_rx_replenish
1009  *
1010  * -- enable interrupts --
1011  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1012  *                            READ INDEX, detaching the SKB from the pool.
1013  *                            Moves the packet buffer from queue to rx_used.
1014  *                            Calls iwl3945_rx_queue_restock to refill any empty
1015  *                            slots.
1016  * ...
1017  *
1018  */
1019
1020 /**
1021  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1022  */
1023 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1024                                           dma_addr_t dma_addr)
1025 {
1026         return cpu_to_le32((u32)dma_addr);
1027 }
1028
1029 /**
1030  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1031  *
1032  * If there are slots in the RX queue that need to be restocked,
1033  * and we have free pre-allocated buffers, fill the ranks as much
1034  * as we can, pulling from rx_free.
1035  *
1036  * This moves the 'write' index forward to catch up with 'processed', and
1037  * also updates the memory address in the firmware to reference the new
1038  * target buffer.
1039  */
1040 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1041 {
1042         struct iwl_rx_queue *rxq = &priv->rxq;
1043         struct list_head *element;
1044         struct iwl_rx_mem_buffer *rxb;
1045         unsigned long flags;
1046         int write;
1047
1048         spin_lock_irqsave(&rxq->lock, flags);
1049         write = rxq->write & ~0x7;
1050         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1051                 /* Get next free Rx buffer, remove from free list */
1052                 element = rxq->rx_free.next;
1053                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1054                 list_del(element);
1055
1056                 /* Point to Rx buffer via next RBD in circular buffer */
1057                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1058                 rxq->queue[rxq->write] = rxb;
1059                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1060                 rxq->free_count--;
1061         }
1062         spin_unlock_irqrestore(&rxq->lock, flags);
1063         /* If the pre-allocated buffer pool is dropping low, schedule to
1064          * refill it */
1065         if (rxq->free_count <= RX_LOW_WATERMARK)
1066                 queue_work(priv->workqueue, &priv->rx_replenish);
1067
1068
1069         /* If we've added more space for the firmware to place data, tell it.
1070          * Increment device's write pointer in multiples of 8. */
1071         if ((rxq->write_actual != (rxq->write & ~0x7))
1072             || (abs(rxq->write - rxq->read) > 7)) {
1073                 spin_lock_irqsave(&rxq->lock, flags);
1074                 rxq->need_update = 1;
1075                 spin_unlock_irqrestore(&rxq->lock, flags);
1076                 iwl_rx_queue_update_write_ptr(priv, rxq);
1077         }
1078 }
1079
1080 /**
1081  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1082  *
1083  * When moving to rx_free an SKB is allocated for the slot.
1084  *
1085  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1086  * This is called as a scheduled work item (except for during initialization)
1087  */
1088 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1089 {
1090         struct iwl_rx_queue *rxq = &priv->rxq;
1091         struct list_head *element;
1092         struct iwl_rx_mem_buffer *rxb;
1093         struct page *page;
1094         unsigned long flags;
1095         gfp_t gfp_mask = priority;
1096
1097         while (1) {
1098                 spin_lock_irqsave(&rxq->lock, flags);
1099
1100                 if (list_empty(&rxq->rx_used)) {
1101                         spin_unlock_irqrestore(&rxq->lock, flags);
1102                         return;
1103                 }
1104                 spin_unlock_irqrestore(&rxq->lock, flags);
1105
1106                 if (rxq->free_count > RX_LOW_WATERMARK)
1107                         gfp_mask |= __GFP_NOWARN;
1108
1109                 if (priv->hw_params.rx_page_order > 0)
1110                         gfp_mask |= __GFP_COMP;
1111
1112                 /* Alloc a new receive buffer */
1113                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1114                 if (!page) {
1115                         if (net_ratelimit())
1116                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1117                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1118                             net_ratelimit())
1119                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1120                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1121                                          rxq->free_count);
1122                         /* We don't reschedule replenish work here -- we will
1123                          * call the restock method and if it still needs
1124                          * more buffers it will schedule replenish */
1125                         break;
1126                 }
1127
1128                 spin_lock_irqsave(&rxq->lock, flags);
1129                 if (list_empty(&rxq->rx_used)) {
1130                         spin_unlock_irqrestore(&rxq->lock, flags);
1131                         __free_pages(page, priv->hw_params.rx_page_order);
1132                         return;
1133                 }
1134                 element = rxq->rx_used.next;
1135                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1136                 list_del(element);
1137                 spin_unlock_irqrestore(&rxq->lock, flags);
1138
1139                 rxb->page = page;
1140                 /* Get physical address of RB/SKB */
1141                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1142                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1143                                 PCI_DMA_FROMDEVICE);
1144
1145                 spin_lock_irqsave(&rxq->lock, flags);
1146
1147                 list_add_tail(&rxb->list, &rxq->rx_free);
1148                 rxq->free_count++;
1149                 priv->alloc_rxb_page++;
1150
1151                 spin_unlock_irqrestore(&rxq->lock, flags);
1152         }
1153 }
1154
1155 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1156 {
1157         unsigned long flags;
1158         int i;
1159         spin_lock_irqsave(&rxq->lock, flags);
1160         INIT_LIST_HEAD(&rxq->rx_free);
1161         INIT_LIST_HEAD(&rxq->rx_used);
1162         /* Fill the rx_used queue with _all_ of the Rx buffers */
1163         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1164                 /* In the reset function, these buffers may have been allocated
1165                  * to an SKB, so we need to unmap and free potential storage */
1166                 if (rxq->pool[i].page != NULL) {
1167                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1168                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1169                                 PCI_DMA_FROMDEVICE);
1170                         __iwl_free_pages(priv, rxq->pool[i].page);
1171                         rxq->pool[i].page = NULL;
1172                 }
1173                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1174         }
1175
1176         /* Set us so that we have processed and used all buffers, but have
1177          * not restocked the Rx queue with fresh buffers */
1178         rxq->read = rxq->write = 0;
1179         rxq->write_actual = 0;
1180         rxq->free_count = 0;
1181         spin_unlock_irqrestore(&rxq->lock, flags);
1182 }
1183
1184 void iwl3945_rx_replenish(void *data)
1185 {
1186         struct iwl_priv *priv = data;
1187         unsigned long flags;
1188
1189         iwl3945_rx_allocate(priv, GFP_KERNEL);
1190
1191         spin_lock_irqsave(&priv->lock, flags);
1192         iwl3945_rx_queue_restock(priv);
1193         spin_unlock_irqrestore(&priv->lock, flags);
1194 }
1195
1196 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1197 {
1198         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1199
1200         iwl3945_rx_queue_restock(priv);
1201 }
1202
1203
1204 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1205  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1206  * This free routine walks the list of POOL entries and if SKB is set to
1207  * non NULL it is unmapped and freed
1208  */
1209 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1210 {
1211         int i;
1212         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1213                 if (rxq->pool[i].page != NULL) {
1214                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1215                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1216                                 PCI_DMA_FROMDEVICE);
1217                         __iwl_free_pages(priv, rxq->pool[i].page);
1218                         rxq->pool[i].page = NULL;
1219                 }
1220         }
1221
1222         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1223                           rxq->dma_addr);
1224         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1225                           rxq->rb_stts, rxq->rb_stts_dma);
1226         rxq->bd = NULL;
1227         rxq->rb_stts  = NULL;
1228 }
1229
1230
1231 /* Convert linear signal-to-noise ratio into dB */
1232 static u8 ratio2dB[100] = {
1233 /*       0   1   2   3   4   5   6   7   8   9 */
1234          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1235         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1236         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1237         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1238         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1239         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1240         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1241         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1242         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1243         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1244 };
1245
1246 /* Calculates a relative dB value from a ratio of linear
1247  *   (i.e. not dB) signal levels.
1248  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1249 int iwl3945_calc_db_from_ratio(int sig_ratio)
1250 {
1251         /* 1000:1 or higher just report as 60 dB */
1252         if (sig_ratio >= 1000)
1253                 return 60;
1254
1255         /* 100:1 or higher, divide by 10 and use table,
1256          *   add 20 dB to make up for divide by 10 */
1257         if (sig_ratio >= 100)
1258                 return 20 + (int)ratio2dB[sig_ratio/10];
1259
1260         /* We shouldn't see this */
1261         if (sig_ratio < 1)
1262                 return 0;
1263
1264         /* Use table for ratios 1:1 - 99:1 */
1265         return (int)ratio2dB[sig_ratio];
1266 }
1267
1268 /**
1269  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1270  *
1271  * Uses the priv->rx_handlers callback function array to invoke
1272  * the appropriate handlers, including command responses,
1273  * frame-received notifications, and other notifications.
1274  */
1275 static void iwl3945_rx_handle(struct iwl_priv *priv)
1276 {
1277         struct iwl_rx_mem_buffer *rxb;
1278         struct iwl_rx_packet *pkt;
1279         struct iwl_rx_queue *rxq = &priv->rxq;
1280         u32 r, i;
1281         int reclaim;
1282         unsigned long flags;
1283         u8 fill_rx = 0;
1284         u32 count = 8;
1285         int total_empty = 0;
1286
1287         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1288          * buffer that the driver may process (last buffer filled by ucode). */
1289         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1290         i = rxq->read;
1291
1292         /* calculate total frames need to be restock after handling RX */
1293         total_empty = r - rxq->write_actual;
1294         if (total_empty < 0)
1295                 total_empty += RX_QUEUE_SIZE;
1296
1297         if (total_empty > (RX_QUEUE_SIZE / 2))
1298                 fill_rx = 1;
1299         /* Rx interrupt, but nothing sent from uCode */
1300         if (i == r)
1301                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1302
1303         while (i != r) {
1304                 rxb = rxq->queue[i];
1305
1306                 /* If an RXB doesn't have a Rx queue slot associated with it,
1307                  * then a bug has been introduced in the queue refilling
1308                  * routines -- catch it here */
1309                 BUG_ON(rxb == NULL);
1310
1311                 rxq->queue[i] = NULL;
1312
1313                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1314                                PAGE_SIZE << priv->hw_params.rx_page_order,
1315                                PCI_DMA_FROMDEVICE);
1316                 pkt = rxb_addr(rxb);
1317
1318                 trace_iwlwifi_dev_rx(priv, pkt,
1319                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1320
1321                 /* Reclaim a command buffer only if this packet is a response
1322                  *   to a (driver-originated) command.
1323                  * If the packet (e.g. Rx frame) originated from uCode,
1324                  *   there is no command buffer to reclaim.
1325                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1326                  *   but apparently a few don't get set; catch them here. */
1327                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1328                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1329                         (pkt->hdr.cmd != REPLY_TX);
1330
1331                 /* Based on type of command response or notification,
1332                  *   handle those that need handling via function in
1333                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1334                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1335                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1336                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1337                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1338                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1339                 } else {
1340                         /* No handling needed */
1341                         IWL_DEBUG_RX(priv,
1342                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1343                                 r, i, get_cmd_string(pkt->hdr.cmd),
1344                                 pkt->hdr.cmd);
1345                 }
1346
1347                 /*
1348                  * XXX: After here, we should always check rxb->page
1349                  * against NULL before touching it or its virtual
1350                  * memory (pkt). Because some rx_handler might have
1351                  * already taken or freed the pages.
1352                  */
1353
1354                 if (reclaim) {
1355                         /* Invoke any callbacks, transfer the buffer to caller,
1356                          * and fire off the (possibly) blocking iwl_send_cmd()
1357                          * as we reclaim the driver command queue */
1358                         if (rxb->page)
1359                                 iwl_tx_cmd_complete(priv, rxb);
1360                         else
1361                                 IWL_WARN(priv, "Claim null rxb?\n");
1362                 }
1363
1364                 /* Reuse the page if possible. For notification packets and
1365                  * SKBs that fail to Rx correctly, add them back into the
1366                  * rx_free list for reuse later. */
1367                 spin_lock_irqsave(&rxq->lock, flags);
1368                 if (rxb->page != NULL) {
1369                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1370                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1371                                 PCI_DMA_FROMDEVICE);
1372                         list_add_tail(&rxb->list, &rxq->rx_free);
1373                         rxq->free_count++;
1374                 } else
1375                         list_add_tail(&rxb->list, &rxq->rx_used);
1376
1377                 spin_unlock_irqrestore(&rxq->lock, flags);
1378
1379                 i = (i + 1) & RX_QUEUE_MASK;
1380                 /* If there are a lot of unused frames,
1381                  * restock the Rx queue so ucode won't assert. */
1382                 if (fill_rx) {
1383                         count++;
1384                         if (count >= 8) {
1385                                 rxq->read = i;
1386                                 iwl3945_rx_replenish_now(priv);
1387                                 count = 0;
1388                         }
1389                 }
1390         }
1391
1392         /* Backtrack one entry */
1393         rxq->read = i;
1394         if (fill_rx)
1395                 iwl3945_rx_replenish_now(priv);
1396         else
1397                 iwl3945_rx_queue_restock(priv);
1398 }
1399
1400 /* call this function to flush any scheduled tasklet */
1401 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1402 {
1403         /* wait to make sure we flush pending tasklet*/
1404         synchronize_irq(priv->pci_dev->irq);
1405         tasklet_kill(&priv->irq_tasklet);
1406 }
1407
1408 static const char *desc_lookup(int i)
1409 {
1410         switch (i) {
1411         case 1:
1412                 return "FAIL";
1413         case 2:
1414                 return "BAD_PARAM";
1415         case 3:
1416                 return "BAD_CHECKSUM";
1417         case 4:
1418                 return "NMI_INTERRUPT";
1419         case 5:
1420                 return "SYSASSERT";
1421         case 6:
1422                 return "FATAL_ERROR";
1423         }
1424
1425         return "UNKNOWN";
1426 }
1427
1428 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1429 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1430
1431 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1432 {
1433         u32 i;
1434         u32 desc, time, count, base, data1;
1435         u32 blink1, blink2, ilink1, ilink2;
1436
1437         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1438
1439         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1440                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1441                 return;
1442         }
1443
1444
1445         count = iwl_read_targ_mem(priv, base);
1446
1447         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1448                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1449                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1450                         priv->status, count);
1451         }
1452
1453         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1454                   "ilink1  nmiPC   Line\n");
1455         for (i = ERROR_START_OFFSET;
1456              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1457              i += ERROR_ELEM_SIZE) {
1458                 desc = iwl_read_targ_mem(priv, base + i);
1459                 time =
1460                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1461                 blink1 =
1462                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1463                 blink2 =
1464                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1465                 ilink1 =
1466                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1467                 ilink2 =
1468                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1469                 data1 =
1470                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1471
1472                 IWL_ERR(priv,
1473                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1474                         desc_lookup(desc), desc, time, blink1, blink2,
1475                         ilink1, ilink2, data1);
1476                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1477                                         0, blink1, blink2, ilink1, ilink2);
1478         }
1479 }
1480
1481 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1482
1483 /**
1484  * iwl3945_print_event_log - Dump error event log to syslog
1485  *
1486  */
1487 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1488                                   u32 num_events, u32 mode,
1489                                   int pos, char **buf, size_t bufsz)
1490 {
1491         u32 i;
1492         u32 base;       /* SRAM byte address of event log header */
1493         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1494         u32 ptr;        /* SRAM byte address of log data */
1495         u32 ev, time, data; /* event log data */
1496         unsigned long reg_flags;
1497
1498         if (num_events == 0)
1499                 return pos;
1500
1501         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1502
1503         if (mode == 0)
1504                 event_size = 2 * sizeof(u32);
1505         else
1506                 event_size = 3 * sizeof(u32);
1507
1508         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1509
1510         /* Make sure device is powered up for SRAM reads */
1511         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1512         iwl_grab_nic_access(priv);
1513
1514         /* Set starting address; reads will auto-increment */
1515         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1516         rmb();
1517
1518         /* "time" is actually "data" for mode 0 (no timestamp).
1519          * place event id # at far right for easier visual parsing. */
1520         for (i = 0; i < num_events; i++) {
1521                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1522                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1523                 if (mode == 0) {
1524                         /* data, ev */
1525                         if (bufsz) {
1526                                 pos += scnprintf(*buf + pos, bufsz - pos,
1527                                                 "0x%08x:%04u\n",
1528                                                 time, ev);
1529                         } else {
1530                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1531                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1532                                                               time, ev);
1533                         }
1534                 } else {
1535                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1536                         if (bufsz) {
1537                                 pos += scnprintf(*buf + pos, bufsz - pos,
1538                                                 "%010u:0x%08x:%04u\n",
1539                                                  time, data, ev);
1540                         } else {
1541                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1542                                         time, data, ev);
1543                                 trace_iwlwifi_dev_ucode_event(priv, time,
1544                                                               data, ev);
1545                         }
1546                 }
1547         }
1548
1549         /* Allow device to power down */
1550         iwl_release_nic_access(priv);
1551         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1552         return pos;
1553 }
1554
1555 /**
1556  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1557  */
1558 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1559                                       u32 num_wraps, u32 next_entry,
1560                                       u32 size, u32 mode,
1561                                       int pos, char **buf, size_t bufsz)
1562 {
1563         /*
1564          * display the newest DEFAULT_LOG_ENTRIES entries
1565          * i.e the entries just before the next ont that uCode would fill.
1566          */
1567         if (num_wraps) {
1568                 if (next_entry < size) {
1569                         pos = iwl3945_print_event_log(priv,
1570                                              capacity - (size - next_entry),
1571                                              size - next_entry, mode,
1572                                              pos, buf, bufsz);
1573                         pos = iwl3945_print_event_log(priv, 0,
1574                                                       next_entry, mode,
1575                                                       pos, buf, bufsz);
1576                 } else
1577                         pos = iwl3945_print_event_log(priv, next_entry - size,
1578                                                       size, mode,
1579                                                       pos, buf, bufsz);
1580         } else {
1581                 if (next_entry < size)
1582                         pos = iwl3945_print_event_log(priv, 0,
1583                                                       next_entry, mode,
1584                                                       pos, buf, bufsz);
1585                 else
1586                         pos = iwl3945_print_event_log(priv, next_entry - size,
1587                                                       size, mode,
1588                                                       pos, buf, bufsz);
1589         }
1590         return pos;
1591 }
1592
1593 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1594
1595 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1596                             char **buf, bool display)
1597 {
1598         u32 base;       /* SRAM byte address of event log header */
1599         u32 capacity;   /* event log capacity in # entries */
1600         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1601         u32 num_wraps;  /* # times uCode wrapped to top of log */
1602         u32 next_entry; /* index of next entry to be written by uCode */
1603         u32 size;       /* # entries that we'll print */
1604         int pos = 0;
1605         size_t bufsz = 0;
1606
1607         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1608         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1609                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1610                 return  -EINVAL;
1611         }
1612
1613         /* event log header */
1614         capacity = iwl_read_targ_mem(priv, base);
1615         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1616         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1617         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1618
1619         if (capacity > priv->cfg->max_event_log_size) {
1620                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1621                         capacity, priv->cfg->max_event_log_size);
1622                 capacity = priv->cfg->max_event_log_size;
1623         }
1624
1625         if (next_entry > priv->cfg->max_event_log_size) {
1626                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1627                         next_entry, priv->cfg->max_event_log_size);
1628                 next_entry = priv->cfg->max_event_log_size;
1629         }
1630
1631         size = num_wraps ? capacity : next_entry;
1632
1633         /* bail out if nothing in log */
1634         if (size == 0) {
1635                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1636                 return pos;
1637         }
1638
1639 #ifdef CONFIG_IWLWIFI_DEBUG
1640         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1641                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1642                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1643 #else
1644         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1645                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1646 #endif
1647
1648         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1649                   size);
1650
1651 #ifdef CONFIG_IWLWIFI_DEBUG
1652         if (display) {
1653                 if (full_log)
1654                         bufsz = capacity * 48;
1655                 else
1656                         bufsz = size * 48;
1657                 *buf = kmalloc(bufsz, GFP_KERNEL);
1658                 if (!*buf)
1659                         return -ENOMEM;
1660         }
1661         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1662                 /* if uCode has wrapped back to top of log,
1663                  * start at the oldest entry,
1664                  * i.e the next one that uCode would fill.
1665                  */
1666                 if (num_wraps)
1667                         pos = iwl3945_print_event_log(priv, next_entry,
1668                                                 capacity - next_entry, mode,
1669                                                 pos, buf, bufsz);
1670
1671                 /* (then/else) start at top of log */
1672                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1673                                               pos, buf, bufsz);
1674         } else
1675                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1676                                                     next_entry, size, mode,
1677                                                     pos, buf, bufsz);
1678 #else
1679         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1680                                             next_entry, size, mode,
1681                                             pos, buf, bufsz);
1682 #endif
1683         return pos;
1684 }
1685
1686 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1687 {
1688         u32 inta, handled = 0;
1689         u32 inta_fh;
1690         unsigned long flags;
1691 #ifdef CONFIG_IWLWIFI_DEBUG
1692         u32 inta_mask;
1693 #endif
1694
1695         spin_lock_irqsave(&priv->lock, flags);
1696
1697         /* Ack/clear/reset pending uCode interrupts.
1698          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1699          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1700         inta = iwl_read32(priv, CSR_INT);
1701         iwl_write32(priv, CSR_INT, inta);
1702
1703         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1704          * Any new interrupts that happen after this, either while we're
1705          * in this tasklet, or later, will show up in next ISR/tasklet. */
1706         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1707         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1708
1709 #ifdef CONFIG_IWLWIFI_DEBUG
1710         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1711                 /* just for debug */
1712                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1713                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1714                               inta, inta_mask, inta_fh);
1715         }
1716 #endif
1717
1718         spin_unlock_irqrestore(&priv->lock, flags);
1719
1720         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1721          * atomic, make sure that inta covers all the interrupts that
1722          * we've discovered, even if FH interrupt came in just after
1723          * reading CSR_INT. */
1724         if (inta_fh & CSR39_FH_INT_RX_MASK)
1725                 inta |= CSR_INT_BIT_FH_RX;
1726         if (inta_fh & CSR39_FH_INT_TX_MASK)
1727                 inta |= CSR_INT_BIT_FH_TX;
1728
1729         /* Now service all interrupt bits discovered above. */
1730         if (inta & CSR_INT_BIT_HW_ERR) {
1731                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1732
1733                 /* Tell the device to stop sending interrupts */
1734                 iwl_disable_interrupts(priv);
1735
1736                 priv->isr_stats.hw++;
1737                 iwl_irq_handle_error(priv);
1738
1739                 handled |= CSR_INT_BIT_HW_ERR;
1740
1741                 return;
1742         }
1743
1744 #ifdef CONFIG_IWLWIFI_DEBUG
1745         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1746                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1747                 if (inta & CSR_INT_BIT_SCD) {
1748                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1749                                       "the frame/frames.\n");
1750                         priv->isr_stats.sch++;
1751                 }
1752
1753                 /* Alive notification via Rx interrupt will do the real work */
1754                 if (inta & CSR_INT_BIT_ALIVE) {
1755                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1756                         priv->isr_stats.alive++;
1757                 }
1758         }
1759 #endif
1760         /* Safely ignore these bits for debug checks below */
1761         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1762
1763         /* Error detected by uCode */
1764         if (inta & CSR_INT_BIT_SW_ERR) {
1765                 IWL_ERR(priv, "Microcode SW error detected. "
1766                         "Restarting 0x%X.\n", inta);
1767                 priv->isr_stats.sw++;
1768                 priv->isr_stats.sw_err = inta;
1769                 iwl_irq_handle_error(priv);
1770                 handled |= CSR_INT_BIT_SW_ERR;
1771         }
1772
1773         /* uCode wakes up after power-down sleep */
1774         if (inta & CSR_INT_BIT_WAKEUP) {
1775                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1776                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1777                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1778                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1779                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1780                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1781                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1782                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1783
1784                 priv->isr_stats.wakeup++;
1785                 handled |= CSR_INT_BIT_WAKEUP;
1786         }
1787
1788         /* All uCode command responses, including Tx command responses,
1789          * Rx "responses" (frame-received notification), and other
1790          * notifications from uCode come through here*/
1791         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1792                 iwl3945_rx_handle(priv);
1793                 priv->isr_stats.rx++;
1794                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1795         }
1796
1797         if (inta & CSR_INT_BIT_FH_TX) {
1798                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1799                 priv->isr_stats.tx++;
1800
1801                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1802                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1803                                         (FH39_SRVC_CHNL), 0x0);
1804                 handled |= CSR_INT_BIT_FH_TX;
1805         }
1806
1807         if (inta & ~handled) {
1808                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1809                 priv->isr_stats.unhandled++;
1810         }
1811
1812         if (inta & ~priv->inta_mask) {
1813                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1814                          inta & ~priv->inta_mask);
1815                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1816         }
1817
1818         /* Re-enable all interrupts */
1819         /* only Re-enable if disabled by irq */
1820         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1821                 iwl_enable_interrupts(priv);
1822
1823 #ifdef CONFIG_IWLWIFI_DEBUG
1824         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1825                 inta = iwl_read32(priv, CSR_INT);
1826                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1827                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1828                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1829                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1830         }
1831 #endif
1832 }
1833
1834 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1835                                          enum ieee80211_band band,
1836                                      u8 is_active, u8 n_probes,
1837                                      struct iwl3945_scan_channel *scan_ch,
1838                                      struct ieee80211_vif *vif)
1839 {
1840         struct ieee80211_channel *chan;
1841         const struct ieee80211_supported_band *sband;
1842         const struct iwl_channel_info *ch_info;
1843         u16 passive_dwell = 0;
1844         u16 active_dwell = 0;
1845         int added, i;
1846
1847         sband = iwl_get_hw_mode(priv, band);
1848         if (!sband)
1849                 return 0;
1850
1851         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1852         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1853
1854         if (passive_dwell <= active_dwell)
1855                 passive_dwell = active_dwell + 1;
1856
1857         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1858                 chan = priv->scan_request->channels[i];
1859
1860                 if (chan->band != band)
1861                         continue;
1862
1863                 scan_ch->channel = chan->hw_value;
1864
1865                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1866                 if (!is_channel_valid(ch_info)) {
1867                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1868                                        scan_ch->channel);
1869                         continue;
1870                 }
1871
1872                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1873                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1874                 /* If passive , set up for auto-switch
1875                  *  and use long active_dwell time.
1876                  */
1877                 if (!is_active || is_channel_passive(ch_info) ||
1878                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1879                         scan_ch->type = 0;      /* passive */
1880                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1881                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1882                 } else {
1883                         scan_ch->type = 1;      /* active */
1884                 }
1885
1886                 /* Set direct probe bits. These may be used both for active
1887                  * scan channels (probes gets sent right away),
1888                  * or for passive channels (probes get se sent only after
1889                  * hearing clear Rx packet).*/
1890                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1891                         if (n_probes)
1892                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1893                 } else {
1894                         /* uCode v1 does not allow setting direct probe bits on
1895                          * passive channel. */
1896                         if ((scan_ch->type & 1) && n_probes)
1897                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1898                 }
1899
1900                 /* Set txpower levels to defaults */
1901                 scan_ch->tpc.dsp_atten = 110;
1902                 /* scan_pwr_info->tpc.dsp_atten; */
1903
1904                 /*scan_pwr_info->tpc.tx_gain; */
1905                 if (band == IEEE80211_BAND_5GHZ)
1906                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1907                 else {
1908                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1909                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1910                          * power level:
1911                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1912                          */
1913                 }
1914
1915                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1916                                scan_ch->channel,
1917                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1918                                (scan_ch->type & 1) ?
1919                                active_dwell : passive_dwell);
1920
1921                 scan_ch++;
1922                 added++;
1923         }
1924
1925         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1926         return added;
1927 }
1928
1929 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1930                               struct ieee80211_rate *rates)
1931 {
1932         int i;
1933
1934         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1935                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1936                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1937                 rates[i].hw_value_short = i;
1938                 rates[i].flags = 0;
1939                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1940                         /*
1941                          * If CCK != 1M then set short preamble rate flag.
1942                          */
1943                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1944                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1945                 }
1946         }
1947 }
1948
1949 /******************************************************************************
1950  *
1951  * uCode download functions
1952  *
1953  ******************************************************************************/
1954
1955 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1956 {
1957         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1958         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1959         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1960         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1961         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1962         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1963 }
1964
1965 /**
1966  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1967  *     looking at all data.
1968  */
1969 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1970 {
1971         u32 val;
1972         u32 save_len = len;
1973         int rc = 0;
1974         u32 errcnt;
1975
1976         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1977
1978         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1979                                IWL39_RTC_INST_LOWER_BOUND);
1980
1981         errcnt = 0;
1982         for (; len > 0; len -= sizeof(u32), image++) {
1983                 /* read data comes through single port, auto-incr addr */
1984                 /* NOTE: Use the debugless read so we don't flood kernel log
1985                  * if IWL_DL_IO is set */
1986                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1987                 if (val != le32_to_cpu(*image)) {
1988                         IWL_ERR(priv, "uCode INST section is invalid at "
1989                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1990                                   save_len - len, val, le32_to_cpu(*image));
1991                         rc = -EIO;
1992                         errcnt++;
1993                         if (errcnt >= 20)
1994                                 break;
1995                 }
1996         }
1997
1998
1999         if (!errcnt)
2000                 IWL_DEBUG_INFO(priv,
2001                         "ucode image in INSTRUCTION memory is good\n");
2002
2003         return rc;
2004 }
2005
2006
2007 /**
2008  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2009  *   using sample data 100 bytes apart.  If these sample points are good,
2010  *   it's a pretty good bet that everything between them is good, too.
2011  */
2012 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2013 {
2014         u32 val;
2015         int rc = 0;
2016         u32 errcnt = 0;
2017         u32 i;
2018
2019         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2020
2021         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2022                 /* read data comes through single port, auto-incr addr */
2023                 /* NOTE: Use the debugless read so we don't flood kernel log
2024                  * if IWL_DL_IO is set */
2025                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2026                         i + IWL39_RTC_INST_LOWER_BOUND);
2027                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2028                 if (val != le32_to_cpu(*image)) {
2029 #if 0 /* Enable this if you want to see details */
2030                         IWL_ERR(priv, "uCode INST section is invalid at "
2031                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2032                                   i, val, *image);
2033 #endif
2034                         rc = -EIO;
2035                         errcnt++;
2036                         if (errcnt >= 3)
2037                                 break;
2038                 }
2039         }
2040
2041         return rc;
2042 }
2043
2044
2045 /**
2046  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2047  *    and verify its contents
2048  */
2049 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2050 {
2051         __le32 *image;
2052         u32 len;
2053         int rc = 0;
2054
2055         /* Try bootstrap */
2056         image = (__le32 *)priv->ucode_boot.v_addr;
2057         len = priv->ucode_boot.len;
2058         rc = iwl3945_verify_inst_sparse(priv, image, len);
2059         if (rc == 0) {
2060                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2061                 return 0;
2062         }
2063
2064         /* Try initialize */
2065         image = (__le32 *)priv->ucode_init.v_addr;
2066         len = priv->ucode_init.len;
2067         rc = iwl3945_verify_inst_sparse(priv, image, len);
2068         if (rc == 0) {
2069                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2070                 return 0;
2071         }
2072
2073         /* Try runtime/protocol */
2074         image = (__le32 *)priv->ucode_code.v_addr;
2075         len = priv->ucode_code.len;
2076         rc = iwl3945_verify_inst_sparse(priv, image, len);
2077         if (rc == 0) {
2078                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2079                 return 0;
2080         }
2081
2082         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2083
2084         /* Since nothing seems to match, show first several data entries in
2085          * instruction SRAM, so maybe visual inspection will give a clue.
2086          * Selection of bootstrap image (vs. other images) is arbitrary. */
2087         image = (__le32 *)priv->ucode_boot.v_addr;
2088         len = priv->ucode_boot.len;
2089         rc = iwl3945_verify_inst_full(priv, image, len);
2090
2091         return rc;
2092 }
2093
2094 static void iwl3945_nic_start(struct iwl_priv *priv)
2095 {
2096         /* Remove all resets to allow NIC to operate */
2097         iwl_write32(priv, CSR_RESET, 0);
2098 }
2099
2100 #define IWL3945_UCODE_GET(item)                                         \
2101 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2102 {                                                                       \
2103         return le32_to_cpu(ucode->u.v1.item);                           \
2104 }
2105
2106 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2107 {
2108         return 24;
2109 }
2110
2111 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2112 {
2113         return (u8 *) ucode->u.v1.data;
2114 }
2115
2116 IWL3945_UCODE_GET(inst_size);
2117 IWL3945_UCODE_GET(data_size);
2118 IWL3945_UCODE_GET(init_size);
2119 IWL3945_UCODE_GET(init_data_size);
2120 IWL3945_UCODE_GET(boot_size);
2121
2122 /**
2123  * iwl3945_read_ucode - Read uCode images from disk file.
2124  *
2125  * Copy into buffers for card to fetch via bus-mastering
2126  */
2127 static int iwl3945_read_ucode(struct iwl_priv *priv)
2128 {
2129         const struct iwl_ucode_header *ucode;
2130         int ret = -EINVAL, index;
2131         const struct firmware *ucode_raw;
2132         /* firmware file name contains uCode/driver compatibility version */
2133         const char *name_pre = priv->cfg->fw_name_pre;
2134         const unsigned int api_max = priv->cfg->ucode_api_max;
2135         const unsigned int api_min = priv->cfg->ucode_api_min;
2136         char buf[25];
2137         u8 *src;
2138         size_t len;
2139         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2140
2141         /* Ask kernel firmware_class module to get the boot firmware off disk.
2142          * request_firmware() is synchronous, file is in memory on return. */
2143         for (index = api_max; index >= api_min; index--) {
2144                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2145                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2146                 if (ret < 0) {
2147                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2148                                   buf, ret);
2149                         if (ret == -ENOENT)
2150                                 continue;
2151                         else
2152                                 goto error;
2153                 } else {
2154                         if (index < api_max)
2155                                 IWL_ERR(priv, "Loaded firmware %s, "
2156                                         "which is deprecated. "
2157                                         " Please use API v%u instead.\n",
2158                                           buf, api_max);
2159                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2160                                        "(%zd bytes) from disk\n",
2161                                        buf, ucode_raw->size);
2162                         break;
2163                 }
2164         }
2165
2166         if (ret < 0)
2167                 goto error;
2168
2169         /* Make sure that we got at least our header! */
2170         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2171                 IWL_ERR(priv, "File size way too small!\n");
2172                 ret = -EINVAL;
2173                 goto err_release;
2174         }
2175
2176         /* Data from ucode file:  header followed by uCode images */
2177         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2178
2179         priv->ucode_ver = le32_to_cpu(ucode->ver);
2180         api_ver = IWL_UCODE_API(priv->ucode_ver);
2181         inst_size = iwl3945_ucode_get_inst_size(ucode);
2182         data_size = iwl3945_ucode_get_data_size(ucode);
2183         init_size = iwl3945_ucode_get_init_size(ucode);
2184         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2185         boot_size = iwl3945_ucode_get_boot_size(ucode);
2186         src = iwl3945_ucode_get_data(ucode);
2187
2188         /* api_ver should match the api version forming part of the
2189          * firmware filename ... but we don't check for that and only rely
2190          * on the API version read from firmware header from here on forward */
2191
2192         if (api_ver < api_min || api_ver > api_max) {
2193                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2194                           "Driver supports v%u, firmware is v%u.\n",
2195                           api_max, api_ver);
2196                 priv->ucode_ver = 0;
2197                 ret = -EINVAL;
2198                 goto err_release;
2199         }
2200         if (api_ver != api_max)
2201                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2202                           "got %u. New firmware can be obtained "
2203                           "from http://www.intellinuxwireless.org.\n",
2204                           api_max, api_ver);
2205
2206         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2207                 IWL_UCODE_MAJOR(priv->ucode_ver),
2208                 IWL_UCODE_MINOR(priv->ucode_ver),
2209                 IWL_UCODE_API(priv->ucode_ver),
2210                 IWL_UCODE_SERIAL(priv->ucode_ver));
2211
2212         snprintf(priv->hw->wiphy->fw_version,
2213                  sizeof(priv->hw->wiphy->fw_version),
2214                  "%u.%u.%u.%u",
2215                  IWL_UCODE_MAJOR(priv->ucode_ver),
2216                  IWL_UCODE_MINOR(priv->ucode_ver),
2217                  IWL_UCODE_API(priv->ucode_ver),
2218                  IWL_UCODE_SERIAL(priv->ucode_ver));
2219
2220         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2221                        priv->ucode_ver);
2222         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2223                        inst_size);
2224         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2225                        data_size);
2226         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2227                        init_size);
2228         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2229                        init_data_size);
2230         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2231                        boot_size);
2232
2233
2234         /* Verify size of file vs. image size info in file's header */
2235         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2236                 inst_size + data_size + init_size +
2237                 init_data_size + boot_size) {
2238
2239                 IWL_DEBUG_INFO(priv,
2240                         "uCode file size %zd does not match expected size\n",
2241                         ucode_raw->size);
2242                 ret = -EINVAL;
2243                 goto err_release;
2244         }
2245
2246         /* Verify that uCode images will fit in card's SRAM */
2247         if (inst_size > IWL39_MAX_INST_SIZE) {
2248                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2249                                inst_size);
2250                 ret = -EINVAL;
2251                 goto err_release;
2252         }
2253
2254         if (data_size > IWL39_MAX_DATA_SIZE) {
2255                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2256                                data_size);
2257                 ret = -EINVAL;
2258                 goto err_release;
2259         }
2260         if (init_size > IWL39_MAX_INST_SIZE) {
2261                 IWL_DEBUG_INFO(priv,
2262                                 "uCode init instr len %d too large to fit in\n",
2263                                 init_size);
2264                 ret = -EINVAL;
2265                 goto err_release;
2266         }
2267         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2268                 IWL_DEBUG_INFO(priv,
2269                                 "uCode init data len %d too large to fit in\n",
2270                                 init_data_size);
2271                 ret = -EINVAL;
2272                 goto err_release;
2273         }
2274         if (boot_size > IWL39_MAX_BSM_SIZE) {
2275                 IWL_DEBUG_INFO(priv,
2276                                 "uCode boot instr len %d too large to fit in\n",
2277                                 boot_size);
2278                 ret = -EINVAL;
2279                 goto err_release;
2280         }
2281
2282         /* Allocate ucode buffers for card's bus-master loading ... */
2283
2284         /* Runtime instructions and 2 copies of data:
2285          * 1) unmodified from disk
2286          * 2) backup cache for save/restore during power-downs */
2287         priv->ucode_code.len = inst_size;
2288         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2289
2290         priv->ucode_data.len = data_size;
2291         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2292
2293         priv->ucode_data_backup.len = data_size;
2294         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2295
2296         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2297             !priv->ucode_data_backup.v_addr)
2298                 goto err_pci_alloc;
2299
2300         /* Initialization instructions and data */
2301         if (init_size && init_data_size) {
2302                 priv->ucode_init.len = init_size;
2303                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2304
2305                 priv->ucode_init_data.len = init_data_size;
2306                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2307
2308                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2309                         goto err_pci_alloc;
2310         }
2311
2312         /* Bootstrap (instructions only, no data) */
2313         if (boot_size) {
2314                 priv->ucode_boot.len = boot_size;
2315                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2316
2317                 if (!priv->ucode_boot.v_addr)
2318                         goto err_pci_alloc;
2319         }
2320
2321         /* Copy images into buffers for card's bus-master reads ... */
2322
2323         /* Runtime instructions (first block of data in file) */
2324         len = inst_size;
2325         IWL_DEBUG_INFO(priv,
2326                 "Copying (but not loading) uCode instr len %zd\n", len);
2327         memcpy(priv->ucode_code.v_addr, src, len);
2328         src += len;
2329
2330         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2331                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2332
2333         /* Runtime data (2nd block)
2334          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2335         len = data_size;
2336         IWL_DEBUG_INFO(priv,
2337                 "Copying (but not loading) uCode data len %zd\n", len);
2338         memcpy(priv->ucode_data.v_addr, src, len);
2339         memcpy(priv->ucode_data_backup.v_addr, src, len);
2340         src += len;
2341
2342         /* Initialization instructions (3rd block) */
2343         if (init_size) {
2344                 len = init_size;
2345                 IWL_DEBUG_INFO(priv,
2346                         "Copying (but not loading) init instr len %zd\n", len);
2347                 memcpy(priv->ucode_init.v_addr, src, len);
2348                 src += len;
2349         }
2350
2351         /* Initialization data (4th block) */
2352         if (init_data_size) {
2353                 len = init_data_size;
2354                 IWL_DEBUG_INFO(priv,
2355                         "Copying (but not loading) init data len %zd\n", len);
2356                 memcpy(priv->ucode_init_data.v_addr, src, len);
2357                 src += len;
2358         }
2359
2360         /* Bootstrap instructions (5th block) */
2361         len = boot_size;
2362         IWL_DEBUG_INFO(priv,
2363                 "Copying (but not loading) boot instr len %zd\n", len);
2364         memcpy(priv->ucode_boot.v_addr, src, len);
2365
2366         /* We have our copies now, allow OS release its copies */
2367         release_firmware(ucode_raw);
2368         return 0;
2369
2370  err_pci_alloc:
2371         IWL_ERR(priv, "failed to allocate pci memory\n");
2372         ret = -ENOMEM;
2373         iwl3945_dealloc_ucode_pci(priv);
2374
2375  err_release:
2376         release_firmware(ucode_raw);
2377
2378  error:
2379         return ret;
2380 }
2381
2382
2383 /**
2384  * iwl3945_set_ucode_ptrs - Set uCode address location
2385  *
2386  * Tell initialization uCode where to find runtime uCode.
2387  *
2388  * BSM registers initially contain pointers to initialization uCode.
2389  * We need to replace them to load runtime uCode inst and data,
2390  * and to save runtime data when powering down.
2391  */
2392 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2393 {
2394         dma_addr_t pinst;
2395         dma_addr_t pdata;
2396
2397         /* bits 31:0 for 3945 */
2398         pinst = priv->ucode_code.p_addr;
2399         pdata = priv->ucode_data_backup.p_addr;
2400
2401         /* Tell bootstrap uCode where to find image to load */
2402         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2403         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2404         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2405                                  priv->ucode_data.len);
2406
2407         /* Inst byte count must be last to set up, bit 31 signals uCode
2408          *   that all new ptr/size info is in place */
2409         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2410                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2411
2412         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2413
2414         return 0;
2415 }
2416
2417 /**
2418  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2419  *
2420  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2421  *
2422  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2423  */
2424 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2425 {
2426         /* Check alive response for "valid" sign from uCode */
2427         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2428                 /* We had an error bringing up the hardware, so take it
2429                  * all the way back down so we can try again */
2430                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2431                 goto restart;
2432         }
2433
2434         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2435          * This is a paranoid check, because we would not have gotten the
2436          * "initialize" alive if code weren't properly loaded.  */
2437         if (iwl3945_verify_ucode(priv)) {
2438                 /* Runtime instruction load was bad;
2439                  * take it all the way back down so we can try again */
2440                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2441                 goto restart;
2442         }
2443
2444         /* Send pointers to protocol/runtime uCode image ... init code will
2445          * load and launch runtime uCode, which will send us another "Alive"
2446          * notification. */
2447         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2448         if (iwl3945_set_ucode_ptrs(priv)) {
2449                 /* Runtime instruction load won't happen;
2450                  * take it all the way back down so we can try again */
2451                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2452                 goto restart;
2453         }
2454         return;
2455
2456  restart:
2457         queue_work(priv->workqueue, &priv->restart);
2458 }
2459
2460 /**
2461  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2462  *                   from protocol/runtime uCode (initialization uCode's
2463  *                   Alive gets handled by iwl3945_init_alive_start()).
2464  */
2465 static void iwl3945_alive_start(struct iwl_priv *priv)
2466 {
2467         int thermal_spin = 0;
2468         u32 rfkill;
2469
2470         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2471
2472         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2473                 /* We had an error bringing up the hardware, so take it
2474                  * all the way back down so we can try again */
2475                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2476                 goto restart;
2477         }
2478
2479         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2480          * This is a paranoid check, because we would not have gotten the
2481          * "runtime" alive if code weren't properly loaded.  */
2482         if (iwl3945_verify_ucode(priv)) {
2483                 /* Runtime instruction load was bad;
2484                  * take it all the way back down so we can try again */
2485                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2486                 goto restart;
2487         }
2488
2489         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2490         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2491
2492         if (rfkill & 0x1) {
2493                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2494                 /* if RFKILL is not on, then wait for thermal
2495                  * sensor in adapter to kick in */
2496                 while (iwl3945_hw_get_temperature(priv) == 0) {
2497                         thermal_spin++;
2498                         udelay(10);
2499                 }
2500
2501                 if (thermal_spin)
2502                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2503                                        thermal_spin * 10);
2504         } else
2505                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2506
2507         /* After the ALIVE response, we can send commands to 3945 uCode */
2508         set_bit(STATUS_ALIVE, &priv->status);
2509
2510         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2511                 /* Enable timer to monitor the driver queues */
2512                 mod_timer(&priv->monitor_recover,
2513                         jiffies +
2514                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2515         }
2516
2517         if (iwl_is_rfkill(priv))
2518                 return;
2519
2520         ieee80211_wake_queues(priv->hw);
2521
2522         priv->active_rate = IWL_RATES_MASK;
2523
2524         iwl_power_update_mode(priv, true);
2525
2526         if (iwl_is_associated(priv)) {
2527                 struct iwl3945_rxon_cmd *active_rxon =
2528                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2529
2530                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2531                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2532         } else {
2533                 /* Initialize our rx_config data */
2534                 iwl_connection_init_rx_config(priv, NULL);
2535         }
2536
2537         /* Configure Bluetooth device coexistence support */
2538         priv->cfg->ops->hcmd->send_bt_config(priv);
2539
2540         /* Configure the adapter for unassociated operation */
2541         iwlcore_commit_rxon(priv);
2542
2543         iwl3945_reg_txpower_periodic(priv);
2544
2545         iwl_leds_init(priv);
2546
2547         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2548         set_bit(STATUS_READY, &priv->status);
2549         wake_up_interruptible(&priv->wait_command_queue);
2550
2551         return;
2552
2553  restart:
2554         queue_work(priv->workqueue, &priv->restart);
2555 }
2556
2557 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2558
2559 static void __iwl3945_down(struct iwl_priv *priv)
2560 {
2561         unsigned long flags;
2562         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2563         struct ieee80211_conf *conf = NULL;
2564
2565         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2566
2567         conf = ieee80211_get_hw_conf(priv->hw);
2568
2569         if (!exit_pending)
2570                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2571
2572         /* Station information will now be cleared in device */
2573         iwl_clear_ucode_stations(priv);
2574         iwl_dealloc_bcast_station(priv);
2575         iwl_clear_driver_stations(priv);
2576
2577         /* Unblock any waiting calls */
2578         wake_up_interruptible_all(&priv->wait_command_queue);
2579
2580         /* Wipe out the EXIT_PENDING status bit if we are not actually
2581          * exiting the module */
2582         if (!exit_pending)
2583                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2584
2585         /* stop and reset the on-board processor */
2586         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2587
2588         /* tell the device to stop sending interrupts */
2589         spin_lock_irqsave(&priv->lock, flags);
2590         iwl_disable_interrupts(priv);
2591         spin_unlock_irqrestore(&priv->lock, flags);
2592         iwl_synchronize_irq(priv);
2593
2594         if (priv->mac80211_registered)
2595                 ieee80211_stop_queues(priv->hw);
2596
2597         /* If we have not previously called iwl3945_init() then
2598          * clear all bits but the RF Kill bits and return */
2599         if (!iwl_is_init(priv)) {
2600                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2601                                         STATUS_RF_KILL_HW |
2602                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2603                                         STATUS_GEO_CONFIGURED |
2604                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2605                                         STATUS_EXIT_PENDING;
2606                 goto exit;
2607         }
2608
2609         /* ...otherwise clear out all the status bits but the RF Kill
2610          * bit and continue taking the NIC down. */
2611         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2612                                 STATUS_RF_KILL_HW |
2613                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2614                                 STATUS_GEO_CONFIGURED |
2615                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2616                                 STATUS_FW_ERROR |
2617                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2618                                 STATUS_EXIT_PENDING;
2619
2620         iwl3945_hw_txq_ctx_stop(priv);
2621         iwl3945_hw_rxq_stop(priv);
2622
2623         /* Power-down device's busmaster DMA clocks */
2624         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2625         udelay(5);
2626
2627         /* Stop the device, and put it in low power state */
2628         priv->cfg->ops->lib->apm_ops.stop(priv);
2629
2630  exit:
2631         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2632
2633         if (priv->ibss_beacon)
2634                 dev_kfree_skb(priv->ibss_beacon);
2635         priv->ibss_beacon = NULL;
2636
2637         /* clear out any free frames */
2638         iwl3945_clear_free_frames(priv);
2639 }
2640
2641 static void iwl3945_down(struct iwl_priv *priv)
2642 {
2643         mutex_lock(&priv->mutex);
2644         __iwl3945_down(priv);
2645         mutex_unlock(&priv->mutex);
2646
2647         iwl3945_cancel_deferred_work(priv);
2648 }
2649
2650 #define MAX_HW_RESTARTS 5
2651
2652 static int __iwl3945_up(struct iwl_priv *priv)
2653 {
2654         int rc, i;
2655
2656         rc = iwl_alloc_bcast_station(priv, false);
2657         if (rc)
2658                 return rc;
2659
2660         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2661                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2662                 return -EIO;
2663         }
2664
2665         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2666                 IWL_ERR(priv, "ucode not available for device bring up\n");
2667                 return -EIO;
2668         }
2669
2670         /* If platform's RF_KILL switch is NOT set to KILL */
2671         if (iwl_read32(priv, CSR_GP_CNTRL) &
2672                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2673                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2674         else {
2675                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2676                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2677                 return -ENODEV;
2678         }
2679
2680         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2681
2682         rc = iwl3945_hw_nic_init(priv);
2683         if (rc) {
2684                 IWL_ERR(priv, "Unable to int nic\n");
2685                 return rc;
2686         }
2687
2688         /* make sure rfkill handshake bits are cleared */
2689         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2690         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2691                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2692
2693         /* clear (again), then enable host interrupts */
2694         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2695         iwl_enable_interrupts(priv);
2696
2697         /* really make sure rfkill handshake bits are cleared */
2698         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2699         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2700
2701         /* Copy original ucode data image from disk into backup cache.
2702          * This will be used to initialize the on-board processor's
2703          * data SRAM for a clean start when the runtime program first loads. */
2704         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2705                priv->ucode_data.len);
2706
2707         /* We return success when we resume from suspend and rf_kill is on. */
2708         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2709                 return 0;
2710
2711         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2712
2713                 /* load bootstrap state machine,
2714                  * load bootstrap program into processor's memory,
2715                  * prepare to load the "initialize" uCode */
2716                 rc = priv->cfg->ops->lib->load_ucode(priv);
2717
2718                 if (rc) {
2719                         IWL_ERR(priv,
2720                                 "Unable to set up bootstrap uCode: %d\n", rc);
2721                         continue;
2722                 }
2723
2724                 /* start card; "initialize" will load runtime ucode */
2725                 iwl3945_nic_start(priv);
2726
2727                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2728
2729                 return 0;
2730         }
2731
2732         set_bit(STATUS_EXIT_PENDING, &priv->status);
2733         __iwl3945_down(priv);
2734         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2735
2736         /* tried to restart and config the device for as long as our
2737          * patience could withstand */
2738         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2739         return -EIO;
2740 }
2741
2742
2743 /*****************************************************************************
2744  *
2745  * Workqueue callbacks
2746  *
2747  *****************************************************************************/
2748
2749 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2750 {
2751         struct iwl_priv *priv =
2752             container_of(data, struct iwl_priv, init_alive_start.work);
2753
2754         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2755                 return;
2756
2757         mutex_lock(&priv->mutex);
2758         iwl3945_init_alive_start(priv);
2759         mutex_unlock(&priv->mutex);
2760 }
2761
2762 static void iwl3945_bg_alive_start(struct work_struct *data)
2763 {
2764         struct iwl_priv *priv =
2765             container_of(data, struct iwl_priv, alive_start.work);
2766
2767         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2768                 return;
2769
2770         mutex_lock(&priv->mutex);
2771         iwl3945_alive_start(priv);
2772         mutex_unlock(&priv->mutex);
2773 }
2774
2775 /*
2776  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2777  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2778  * *is* readable even when device has been SW_RESET into low power mode
2779  * (e.g. during RF KILL).
2780  */
2781 static void iwl3945_rfkill_poll(struct work_struct *data)
2782 {
2783         struct iwl_priv *priv =
2784             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2785         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2786         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2787                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2788
2789         if (new_rfkill != old_rfkill) {
2790                 if (new_rfkill)
2791                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2792                 else
2793                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2794
2795                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2796
2797                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2798                                 new_rfkill ? "disable radio" : "enable radio");
2799         }
2800
2801         /* Keep this running, even if radio now enabled.  This will be
2802          * cancelled in mac_start() if system decides to start again */
2803         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2804                            round_jiffies_relative(2 * HZ));
2805
2806 }
2807
2808 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2809 {
2810         struct iwl_host_cmd cmd = {
2811                 .id = REPLY_SCAN_CMD,
2812                 .len = sizeof(struct iwl3945_scan_cmd),
2813                 .flags = CMD_SIZE_HUGE,
2814         };
2815         struct iwl3945_scan_cmd *scan;
2816         struct ieee80211_conf *conf = NULL;
2817         u8 n_probes = 0;
2818         enum ieee80211_band band;
2819         bool is_active = false;
2820
2821         conf = ieee80211_get_hw_conf(priv->hw);
2822
2823         cancel_delayed_work(&priv->scan_check);
2824
2825         if (!iwl_is_ready(priv)) {
2826                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2827                 goto done;
2828         }
2829
2830         /* Make sure the scan wasn't canceled before this queued work
2831          * was given the chance to run... */
2832         if (!test_bit(STATUS_SCANNING, &priv->status))
2833                 goto done;
2834
2835         /* This should never be called or scheduled if there is currently
2836          * a scan active in the hardware. */
2837         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2838                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2839                                 "Ignoring second request.\n");
2840                 goto done;
2841         }
2842
2843         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2844                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2845                 goto done;
2846         }
2847
2848         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2849                 IWL_DEBUG_HC(priv,
2850                         "Scan request while abort pending. Queuing.\n");
2851                 goto done;
2852         }
2853
2854         if (iwl_is_rfkill(priv)) {
2855                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2856                 goto done;
2857         }
2858
2859         if (!test_bit(STATUS_READY, &priv->status)) {
2860                 IWL_DEBUG_HC(priv,
2861                         "Scan request while uninitialized. Queuing.\n");
2862                 goto done;
2863         }
2864
2865         if (!priv->scan_cmd) {
2866                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2867                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2868                 if (!priv->scan_cmd) {
2869                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2870                         goto done;
2871                 }
2872         }
2873         scan = priv->scan_cmd;
2874         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2875
2876         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2877         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2878
2879         if (iwl_is_associated(priv)) {
2880                 u16 interval = 0;
2881                 u32 extra;
2882                 u32 suspend_time = 100;
2883                 u32 scan_suspend_time = 100;
2884                 unsigned long flags;
2885
2886                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2887
2888                 spin_lock_irqsave(&priv->lock, flags);
2889                 interval = vif ? vif->bss_conf.beacon_int : 0;
2890                 spin_unlock_irqrestore(&priv->lock, flags);
2891
2892                 scan->suspend_time = 0;
2893                 scan->max_out_time = cpu_to_le32(200 * 1024);
2894                 if (!interval)
2895                         interval = suspend_time;
2896                 /*
2897                  * suspend time format:
2898                  *  0-19: beacon interval in usec (time before exec.)
2899                  * 20-23: 0
2900                  * 24-31: number of beacons (suspend between channels)
2901                  */
2902
2903                 extra = (suspend_time / interval) << 24;
2904                 scan_suspend_time = 0xFF0FFFFF &
2905                     (extra | ((suspend_time % interval) * 1024));
2906
2907                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2908                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2909                                scan_suspend_time, interval);
2910         }
2911
2912         if (priv->is_internal_short_scan) {
2913                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2914         } else if (priv->scan_request->n_ssids) {
2915                 int i, p = 0;
2916                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2917                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2918                         /* always does wildcard anyway */
2919                         if (!priv->scan_request->ssids[i].ssid_len)
2920                                 continue;
2921                         scan->direct_scan[p].id = WLAN_EID_SSID;
2922                         scan->direct_scan[p].len =
2923                                 priv->scan_request->ssids[i].ssid_len;
2924                         memcpy(scan->direct_scan[p].ssid,
2925                                priv->scan_request->ssids[i].ssid,
2926                                priv->scan_request->ssids[i].ssid_len);
2927                         n_probes++;
2928                         p++;
2929                 }
2930                 is_active = true;
2931         } else
2932                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2933
2934         /* We don't build a direct scan probe request; the uCode will do
2935          * that based on the direct_mask added to each channel entry */
2936         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2937         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2938         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2939
2940         /* flags + rate selection */
2941
2942         switch (priv->scan_band) {
2943         case IEEE80211_BAND_2GHZ:
2944                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2945                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2946                 scan->good_CRC_th = 0;
2947                 band = IEEE80211_BAND_2GHZ;
2948                 break;
2949         case IEEE80211_BAND_5GHZ:
2950                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2951                 /*
2952                  * If active scaning is requested but a certain channel
2953                  * is marked passive, we can do active scanning if we
2954                  * detect transmissions.
2955                  */
2956                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2957                                                 IWL_GOOD_CRC_TH_DISABLED;
2958                 band = IEEE80211_BAND_5GHZ;
2959                 break;
2960         default:
2961                 IWL_WARN(priv, "Invalid scan band\n");
2962                 goto done;
2963         }
2964
2965         if (!priv->is_internal_short_scan) {
2966                 scan->tx_cmd.len = cpu_to_le16(
2967                         iwl_fill_probe_req(priv,
2968                                 (struct ieee80211_mgmt *)scan->data,
2969                                 priv->scan_request->ie,
2970                                 priv->scan_request->ie_len,
2971                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2972         } else {
2973                 scan->tx_cmd.len = cpu_to_le16(
2974                         iwl_fill_probe_req(priv,
2975                                 (struct ieee80211_mgmt *)scan->data,
2976                                 NULL, 0,
2977                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2978         }
2979         /* select Rx antennas */
2980         scan->flags |= iwl3945_get_antenna_flags(priv);
2981
2982         scan->channel_count =
2983                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2984                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2985
2986         if (scan->channel_count == 0) {
2987                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2988                 goto done;
2989         }
2990
2991         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2992             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2993         cmd.data = scan;
2994         scan->len = cpu_to_le16(cmd.len);
2995
2996         set_bit(STATUS_SCAN_HW, &priv->status);
2997         if (iwl_send_cmd_sync(priv, &cmd))
2998                 goto done;
2999
3000         queue_delayed_work(priv->workqueue, &priv->scan_check,
3001                            IWL_SCAN_CHECK_WATCHDOG);
3002
3003         return;
3004
3005  done:
3006         /* can not perform scan make sure we clear scanning
3007          * bits from status so next scan request can be performed.
3008          * if we dont clear scanning status bit here all next scan
3009          * will fail
3010         */
3011         clear_bit(STATUS_SCAN_HW, &priv->status);
3012         clear_bit(STATUS_SCANNING, &priv->status);
3013
3014         /* inform mac80211 scan aborted */
3015         queue_work(priv->workqueue, &priv->scan_completed);
3016 }
3017
3018 static void iwl3945_bg_restart(struct work_struct *data)
3019 {
3020         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3021
3022         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3023                 return;
3024
3025         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3026                 mutex_lock(&priv->mutex);
3027                 priv->vif = NULL;
3028                 priv->is_open = 0;
3029                 mutex_unlock(&priv->mutex);
3030                 iwl3945_down(priv);
3031                 ieee80211_restart_hw(priv->hw);
3032         } else {
3033                 iwl3945_down(priv);
3034
3035                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3036                         return;
3037
3038                 mutex_lock(&priv->mutex);
3039                 __iwl3945_up(priv);
3040                 mutex_unlock(&priv->mutex);
3041         }
3042 }
3043
3044 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3045 {
3046         struct iwl_priv *priv =
3047             container_of(data, struct iwl_priv, rx_replenish);
3048
3049         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3050                 return;
3051
3052         mutex_lock(&priv->mutex);
3053         iwl3945_rx_replenish(priv);
3054         mutex_unlock(&priv->mutex);
3055 }
3056
3057 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3058 {
3059         int rc = 0;
3060         struct ieee80211_conf *conf = NULL;
3061
3062         if (!vif || !priv->is_open)
3063                 return;
3064
3065         if (vif->type == NL80211_IFTYPE_AP) {
3066                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3067                 return;
3068         }
3069
3070         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3071                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3072
3073         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3074                 return;
3075
3076         iwl_scan_cancel_timeout(priv, 200);
3077
3078         conf = ieee80211_get_hw_conf(priv->hw);
3079
3080         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3081         iwlcore_commit_rxon(priv);
3082
3083         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3084         iwl_setup_rxon_timing(priv, vif);
3085         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3086                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3087         if (rc)
3088                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3089                             "Attempting to continue.\n");
3090
3091         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3092
3093         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3094
3095         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3096                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3097
3098         if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3099                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3100         else
3101                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3102
3103         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3104                 if (vif->bss_conf.assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3105                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3106                 else
3107                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3108
3109                 if (vif->type == NL80211_IFTYPE_ADHOC)
3110                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3111         }
3112
3113         iwlcore_commit_rxon(priv);
3114
3115         switch (vif->type) {
3116         case NL80211_IFTYPE_STATION:
3117                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3118                 break;
3119         case NL80211_IFTYPE_ADHOC:
3120                 iwl3945_send_beacon_cmd(priv);
3121                 break;
3122         default:
3123                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3124                         __func__, vif->type);
3125                 break;
3126         }
3127 }
3128
3129 /*****************************************************************************
3130  *
3131  * mac80211 entry point functions
3132  *
3133  *****************************************************************************/
3134
3135 #define UCODE_READY_TIMEOUT     (2 * HZ)
3136
3137 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3138 {
3139         struct iwl_priv *priv = hw->priv;
3140         int ret;
3141
3142         IWL_DEBUG_MAC80211(priv, "enter\n");
3143
3144         /* we should be verifying the device is ready to be opened */
3145         mutex_lock(&priv->mutex);
3146
3147         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3148          * ucode filename and max sizes are card-specific. */
3149
3150         if (!priv->ucode_code.len) {
3151                 ret = iwl3945_read_ucode(priv);
3152                 if (ret) {
3153                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3154                         mutex_unlock(&priv->mutex);
3155                         goto out_release_irq;
3156                 }
3157         }
3158
3159         ret = __iwl3945_up(priv);
3160
3161         mutex_unlock(&priv->mutex);
3162
3163         if (ret)
3164                 goto out_release_irq;
3165
3166         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3167
3168         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3169          * mac80211 will not be run successfully. */
3170         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3171                         test_bit(STATUS_READY, &priv->status),
3172                         UCODE_READY_TIMEOUT);
3173         if (!ret) {
3174                 if (!test_bit(STATUS_READY, &priv->status)) {
3175                         IWL_ERR(priv,
3176                                 "Wait for START_ALIVE timeout after %dms.\n",
3177                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3178                         ret = -ETIMEDOUT;
3179                         goto out_release_irq;
3180                 }
3181         }
3182
3183         /* ucode is running and will send rfkill notifications,
3184          * no need to poll the killswitch state anymore */
3185         cancel_delayed_work(&priv->_3945.rfkill_poll);
3186
3187         iwl_led_start(priv);
3188
3189         priv->is_open = 1;
3190         IWL_DEBUG_MAC80211(priv, "leave\n");
3191         return 0;
3192
3193 out_release_irq:
3194         priv->is_open = 0;
3195         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3196         return ret;
3197 }
3198
3199 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3200 {
3201         struct iwl_priv *priv = hw->priv;
3202
3203         IWL_DEBUG_MAC80211(priv, "enter\n");
3204
3205         if (!priv->is_open) {
3206                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3207                 return;
3208         }
3209
3210         priv->is_open = 0;
3211
3212         if (iwl_is_ready_rf(priv)) {
3213                 /* stop mac, cancel any scan request and clear
3214                  * RXON_FILTER_ASSOC_MSK BIT
3215                  */
3216                 mutex_lock(&priv->mutex);
3217                 iwl_scan_cancel_timeout(priv, 100);
3218                 mutex_unlock(&priv->mutex);
3219         }
3220
3221         iwl3945_down(priv);
3222
3223         flush_workqueue(priv->workqueue);
3224
3225         /* start polling the killswitch state again */
3226         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3227                            round_jiffies_relative(2 * HZ));
3228
3229         IWL_DEBUG_MAC80211(priv, "leave\n");
3230 }
3231
3232 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3233 {
3234         struct iwl_priv *priv = hw->priv;
3235
3236         IWL_DEBUG_MAC80211(priv, "enter\n");
3237
3238         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3239                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3240
3241         if (iwl3945_tx_skb(priv, skb))
3242                 dev_kfree_skb_any(skb);
3243
3244         IWL_DEBUG_MAC80211(priv, "leave\n");
3245         return NETDEV_TX_OK;
3246 }
3247
3248 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3249 {
3250         int rc = 0;
3251
3252         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3253                 return;
3254
3255         /* The following should be done only at AP bring up */
3256         if (!(iwl_is_associated(priv))) {
3257
3258                 /* RXON - unassoc (to set timing command) */
3259                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3260                 iwlcore_commit_rxon(priv);
3261
3262                 /* RXON Timing */
3263                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3264                 iwl_setup_rxon_timing(priv, vif);
3265                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3266                                       sizeof(priv->rxon_timing),
3267                                       &priv->rxon_timing);
3268                 if (rc)
3269                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3270                                         "Attempting to continue.\n");
3271
3272                 priv->staging_rxon.assoc_id = 0;
3273
3274                 if (vif->bss_conf.assoc_capability &
3275                                         WLAN_CAPABILITY_SHORT_PREAMBLE)
3276                         priv->staging_rxon.flags |=
3277                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3278                 else
3279                         priv->staging_rxon.flags &=
3280                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3281
3282                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3283                         if (vif->bss_conf.assoc_capability &
3284                                         WLAN_CAPABILITY_SHORT_SLOT_TIME)
3285                                 priv->staging_rxon.flags |=
3286                                         RXON_FLG_SHORT_SLOT_MSK;
3287                         else
3288                                 priv->staging_rxon.flags &=
3289                                         ~RXON_FLG_SHORT_SLOT_MSK;
3290
3291                         if (vif->type == NL80211_IFTYPE_ADHOC)
3292                                 priv->staging_rxon.flags &=
3293                                         ~RXON_FLG_SHORT_SLOT_MSK;
3294                 }
3295                 /* restore RXON assoc */
3296                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3297                 iwlcore_commit_rxon(priv);
3298         }
3299         iwl3945_send_beacon_cmd(priv);
3300
3301         /* FIXME - we need to add code here to detect a totally new
3302          * configuration, reset the AP, unassoc, rxon timing, assoc,
3303          * clear sta table, add BCAST sta... */
3304 }
3305
3306 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3307                                struct ieee80211_vif *vif,
3308                                struct ieee80211_sta *sta,
3309                                struct ieee80211_key_conf *key)
3310 {
3311         struct iwl_priv *priv = hw->priv;
3312         int ret = 0;
3313         u8 sta_id = IWL_INVALID_STATION;
3314         u8 static_key;
3315
3316         IWL_DEBUG_MAC80211(priv, "enter\n");
3317
3318         if (iwl3945_mod_params.sw_crypto) {
3319                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3320                 return -EOPNOTSUPP;
3321         }
3322
3323         static_key = !iwl_is_associated(priv);
3324
3325         if (!static_key) {
3326                 sta_id = iwl_sta_id_or_broadcast(priv, sta);
3327                 if (sta_id == IWL_INVALID_STATION)
3328                         return -EINVAL;
3329         }
3330
3331         mutex_lock(&priv->mutex);
3332         iwl_scan_cancel_timeout(priv, 100);
3333
3334         switch (cmd) {
3335         case SET_KEY:
3336                 if (static_key)
3337                         ret = iwl3945_set_static_key(priv, key);
3338                 else
3339                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3340                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3341                 break;
3342         case DISABLE_KEY:
3343                 if (static_key)
3344                         ret = iwl3945_remove_static_key(priv);
3345                 else
3346                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3347                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3348                 break;
3349         default:
3350                 ret = -EINVAL;
3351         }
3352
3353         mutex_unlock(&priv->mutex);
3354         IWL_DEBUG_MAC80211(priv, "leave\n");
3355
3356         return ret;
3357 }
3358
3359 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3360                                struct ieee80211_vif *vif,
3361                                struct ieee80211_sta *sta)
3362 {
3363         struct iwl_priv *priv = hw->priv;
3364         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3365         int ret;
3366         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3367         u8 sta_id;
3368
3369         sta_priv->common.sta_id = IWL_INVALID_STATION;
3370
3371         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3372                         sta->addr);
3373
3374         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3375                                      &sta_id);
3376         if (ret) {
3377                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3378                         sta->addr, ret);
3379                 /* Should we return success if return code is EEXIST ? */
3380                 return ret;
3381         }
3382
3383         sta_priv->common.sta_id = sta_id;
3384
3385         /* Initialize rate scaling */
3386         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3387                        sta->addr);
3388         iwl3945_rs_rate_init(priv, sta, sta_id);
3389
3390         return 0;
3391 }
3392 /*****************************************************************************
3393  *
3394  * sysfs attributes
3395  *
3396  *****************************************************************************/
3397
3398 #ifdef CONFIG_IWLWIFI_DEBUG
3399
3400 /*
3401  * The following adds a new attribute to the sysfs representation
3402  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3403  * used for controlling the debug level.
3404  *
3405  * See the level definitions in iwl for details.
3406  *
3407  * The debug_level being managed using sysfs below is a per device debug
3408  * level that is used instead of the global debug level if it (the per
3409  * device debug level) is set.
3410  */
3411 static ssize_t show_debug_level(struct device *d,
3412                                 struct device_attribute *attr, char *buf)
3413 {
3414         struct iwl_priv *priv = dev_get_drvdata(d);
3415         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3416 }
3417 static ssize_t store_debug_level(struct device *d,
3418                                 struct device_attribute *attr,
3419                                  const char *buf, size_t count)
3420 {
3421         struct iwl_priv *priv = dev_get_drvdata(d);
3422         unsigned long val;
3423         int ret;
3424
3425         ret = strict_strtoul(buf, 0, &val);
3426         if (ret)
3427                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3428         else {
3429                 priv->debug_level = val;
3430                 if (iwl_alloc_traffic_mem(priv))
3431                         IWL_ERR(priv,
3432                                 "Not enough memory to generate traffic log\n");
3433         }
3434         return strnlen(buf, count);
3435 }
3436
3437 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3438                         show_debug_level, store_debug_level);
3439
3440 #endif /* CONFIG_IWLWIFI_DEBUG */
3441
3442 static ssize_t show_temperature(struct device *d,
3443                                 struct device_attribute *attr, char *buf)
3444 {
3445         struct iwl_priv *priv = dev_get_drvdata(d);
3446
3447         if (!iwl_is_alive(priv))
3448                 return -EAGAIN;
3449
3450         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3451 }
3452
3453 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3454
3455 static ssize_t show_tx_power(struct device *d,
3456                              struct device_attribute *attr, char *buf)
3457 {
3458         struct iwl_priv *priv = dev_get_drvdata(d);
3459         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3460 }
3461
3462 static ssize_t store_tx_power(struct device *d,
3463                               struct device_attribute *attr,
3464                               const char *buf, size_t count)
3465 {
3466         struct iwl_priv *priv = dev_get_drvdata(d);
3467         char *p = (char *)buf;
3468         u32 val;
3469
3470         val = simple_strtoul(p, &p, 10);
3471         if (p == buf)
3472                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3473         else
3474                 iwl3945_hw_reg_set_txpower(priv, val);
3475
3476         return count;
3477 }
3478
3479 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3480
3481 static ssize_t show_flags(struct device *d,
3482                           struct device_attribute *attr, char *buf)
3483 {
3484         struct iwl_priv *priv = dev_get_drvdata(d);
3485
3486         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3487 }
3488
3489 static ssize_t store_flags(struct device *d,
3490                            struct device_attribute *attr,
3491                            const char *buf, size_t count)
3492 {
3493         struct iwl_priv *priv = dev_get_drvdata(d);
3494         u32 flags = simple_strtoul(buf, NULL, 0);
3495
3496         mutex_lock(&priv->mutex);
3497         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3498                 /* Cancel any currently running scans... */
3499                 if (iwl_scan_cancel_timeout(priv, 100))
3500                         IWL_WARN(priv, "Could not cancel scan.\n");
3501                 else {
3502                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3503                                        flags);
3504                         priv->staging_rxon.flags = cpu_to_le32(flags);
3505                         iwlcore_commit_rxon(priv);
3506                 }
3507         }
3508         mutex_unlock(&priv->mutex);
3509
3510         return count;
3511 }
3512
3513 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3514
3515 static ssize_t show_filter_flags(struct device *d,
3516                                  struct device_attribute *attr, char *buf)
3517 {
3518         struct iwl_priv *priv = dev_get_drvdata(d);
3519
3520         return sprintf(buf, "0x%04X\n",
3521                 le32_to_cpu(priv->active_rxon.filter_flags));
3522 }
3523
3524 static ssize_t store_filter_flags(struct device *d,
3525                                   struct device_attribute *attr,
3526                                   const char *buf, size_t count)
3527 {
3528         struct iwl_priv *priv = dev_get_drvdata(d);
3529         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3530
3531         mutex_lock(&priv->mutex);
3532         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3533                 /* Cancel any currently running scans... */
3534                 if (iwl_scan_cancel_timeout(priv, 100))
3535                         IWL_WARN(priv, "Could not cancel scan.\n");
3536                 else {
3537                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3538                                        "0x%04X\n", filter_flags);
3539                         priv->staging_rxon.filter_flags =
3540                                 cpu_to_le32(filter_flags);
3541                         iwlcore_commit_rxon(priv);
3542                 }
3543         }
3544         mutex_unlock(&priv->mutex);
3545
3546         return count;
3547 }
3548
3549 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3550                    store_filter_flags);
3551
3552 static ssize_t show_measurement(struct device *d,
3553                                 struct device_attribute *attr, char *buf)
3554 {
3555         struct iwl_priv *priv = dev_get_drvdata(d);
3556         struct iwl_spectrum_notification measure_report;
3557         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3558         u8 *data = (u8 *)&measure_report;
3559         unsigned long flags;
3560
3561         spin_lock_irqsave(&priv->lock, flags);
3562         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3563                 spin_unlock_irqrestore(&priv->lock, flags);
3564                 return 0;
3565         }
3566         memcpy(&measure_report, &priv->measure_report, size);
3567         priv->measurement_status = 0;
3568         spin_unlock_irqrestore(&priv->lock, flags);
3569
3570         while (size && (PAGE_SIZE - len)) {
3571                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3572                                    PAGE_SIZE - len, 1);
3573                 len = strlen(buf);
3574                 if (PAGE_SIZE - len)
3575                         buf[len++] = '\n';
3576
3577                 ofs += 16;
3578                 size -= min(size, 16U);
3579         }
3580
3581         return len;
3582 }
3583
3584 static ssize_t store_measurement(struct device *d,
3585                                  struct device_attribute *attr,
3586                                  const char *buf, size_t count)
3587 {
3588         struct iwl_priv *priv = dev_get_drvdata(d);
3589         struct ieee80211_measurement_params params = {
3590                 .channel = le16_to_cpu(priv->active_rxon.channel),
3591                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3592                 .duration = cpu_to_le16(1),
3593         };
3594         u8 type = IWL_MEASURE_BASIC;
3595         u8 buffer[32];
3596         u8 channel;
3597
3598         if (count) {
3599                 char *p = buffer;
3600                 strncpy(buffer, buf, min(sizeof(buffer), count));
3601                 channel = simple_strtoul(p, NULL, 0);
3602                 if (channel)
3603                         params.channel = channel;
3604
3605                 p = buffer;
3606                 while (*p && *p != ' ')
3607                         p++;
3608                 if (*p)
3609                         type = simple_strtoul(p + 1, NULL, 0);
3610         }
3611
3612         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3613                        "channel %d (for '%s')\n", type, params.channel, buf);
3614         iwl3945_get_measurement(priv, &params, type);
3615
3616         return count;
3617 }
3618
3619 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3620                    show_measurement, store_measurement);
3621
3622 static ssize_t store_retry_rate(struct device *d,
3623                                 struct device_attribute *attr,
3624                                 const char *buf, size_t count)
3625 {
3626         struct iwl_priv *priv = dev_get_drvdata(d);
3627
3628         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3629         if (priv->retry_rate <= 0)
3630                 priv->retry_rate = 1;
3631
3632         return count;
3633 }
3634
3635 static ssize_t show_retry_rate(struct device *d,
3636                                struct device_attribute *attr, char *buf)
3637 {
3638         struct iwl_priv *priv = dev_get_drvdata(d);
3639         return sprintf(buf, "%d", priv->retry_rate);
3640 }
3641
3642 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3643                    store_retry_rate);
3644
3645
3646 static ssize_t show_channels(struct device *d,
3647                              struct device_attribute *attr, char *buf)
3648 {
3649         /* all this shit doesn't belong into sysfs anyway */
3650         return 0;
3651 }
3652
3653 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3654
3655 static ssize_t show_antenna(struct device *d,
3656                             struct device_attribute *attr, char *buf)
3657 {
3658         struct iwl_priv *priv = dev_get_drvdata(d);
3659
3660         if (!iwl_is_alive(priv))
3661                 return -EAGAIN;
3662
3663         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3664 }
3665
3666 static ssize_t store_antenna(struct device *d,
3667                              struct device_attribute *attr,
3668                              const char *buf, size_t count)
3669 {
3670         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3671         int ant;
3672
3673         if (count == 0)
3674                 return 0;
3675
3676         if (sscanf(buf, "%1i", &ant) != 1) {
3677                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3678                 return count;
3679         }
3680
3681         if ((ant >= 0) && (ant <= 2)) {
3682                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3683                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3684         } else
3685                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3686
3687
3688         return count;
3689 }
3690
3691 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3692
3693 static ssize_t show_status(struct device *d,
3694                            struct device_attribute *attr, char *buf)
3695 {
3696         struct iwl_priv *priv = dev_get_drvdata(d);
3697         if (!iwl_is_alive(priv))
3698                 return -EAGAIN;
3699         return sprintf(buf, "0x%08x\n", (int)priv->status);
3700 }
3701
3702 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3703
3704 static ssize_t dump_error_log(struct device *d,
3705                               struct device_attribute *attr,
3706                               const char *buf, size_t count)
3707 {
3708         struct iwl_priv *priv = dev_get_drvdata(d);
3709         char *p = (char *)buf;
3710
3711         if (p[0] == '1')
3712                 iwl3945_dump_nic_error_log(priv);
3713
3714         return strnlen(buf, count);
3715 }
3716
3717 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3718
3719 /*****************************************************************************
3720  *
3721  * driver setup and tear down
3722  *
3723  *****************************************************************************/
3724
3725 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3726 {
3727         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3728
3729         init_waitqueue_head(&priv->wait_command_queue);
3730
3731         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3732         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3733         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3734         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3735         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3736         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3737         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3738         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3739         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3740         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3741
3742         iwl3945_hw_setup_deferred_work(priv);
3743
3744         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3745                 init_timer(&priv->monitor_recover);
3746                 priv->monitor_recover.data = (unsigned long)priv;
3747                 priv->monitor_recover.function =
3748                         priv->cfg->ops->lib->recover_from_tx_stall;
3749         }
3750
3751         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3752                      iwl3945_irq_tasklet, (unsigned long)priv);
3753 }
3754
3755 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3756 {
3757         iwl3945_hw_cancel_deferred_work(priv);
3758
3759         cancel_delayed_work_sync(&priv->init_alive_start);
3760         cancel_delayed_work(&priv->scan_check);
3761         cancel_delayed_work(&priv->alive_start);
3762         cancel_work_sync(&priv->start_internal_scan);
3763         cancel_work_sync(&priv->beacon_update);
3764         if (priv->cfg->ops->lib->recover_from_tx_stall)
3765                 del_timer_sync(&priv->monitor_recover);
3766 }
3767
3768 static struct attribute *iwl3945_sysfs_entries[] = {
3769         &dev_attr_antenna.attr,
3770         &dev_attr_channels.attr,
3771         &dev_attr_dump_errors.attr,
3772         &dev_attr_flags.attr,
3773         &dev_attr_filter_flags.attr,
3774         &dev_attr_measurement.attr,
3775         &dev_attr_retry_rate.attr,
3776         &dev_attr_status.attr,
3777         &dev_attr_temperature.attr,
3778         &dev_attr_tx_power.attr,
3779 #ifdef CONFIG_IWLWIFI_DEBUG
3780         &dev_attr_debug_level.attr,
3781 #endif
3782         NULL
3783 };
3784
3785 static struct attribute_group iwl3945_attribute_group = {
3786         .name = NULL,           /* put in device directory */
3787         .attrs = iwl3945_sysfs_entries,
3788 };
3789
3790 static struct ieee80211_ops iwl3945_hw_ops = {
3791         .tx = iwl3945_mac_tx,
3792         .start = iwl3945_mac_start,
3793         .stop = iwl3945_mac_stop,
3794         .add_interface = iwl_mac_add_interface,
3795         .remove_interface = iwl_mac_remove_interface,
3796         .config = iwl_mac_config,
3797         .configure_filter = iwl_configure_filter,
3798         .set_key = iwl3945_mac_set_key,
3799         .conf_tx = iwl_mac_conf_tx,
3800         .reset_tsf = iwl_mac_reset_tsf,
3801         .bss_info_changed = iwl_bss_info_changed,
3802         .hw_scan = iwl_mac_hw_scan,
3803         .sta_add = iwl3945_mac_sta_add,
3804         .sta_remove = iwl_mac_sta_remove,
3805 };
3806
3807 static int iwl3945_init_drv(struct iwl_priv *priv)
3808 {
3809         int ret;
3810         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3811
3812         priv->retry_rate = 1;
3813         priv->ibss_beacon = NULL;
3814
3815         spin_lock_init(&priv->sta_lock);
3816         spin_lock_init(&priv->hcmd_lock);
3817
3818         INIT_LIST_HEAD(&priv->free_frames);
3819
3820         mutex_init(&priv->mutex);
3821         mutex_init(&priv->sync_cmd_mutex);
3822
3823         priv->ieee_channels = NULL;
3824         priv->ieee_rates = NULL;
3825         priv->band = IEEE80211_BAND_2GHZ;
3826
3827         priv->iw_mode = NL80211_IFTYPE_STATION;
3828         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3829
3830         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3831
3832         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3833                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3834                          eeprom->version);
3835                 ret = -EINVAL;
3836                 goto err;
3837         }
3838         ret = iwl_init_channel_map(priv);
3839         if (ret) {
3840                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3841                 goto err;
3842         }
3843
3844         /* Set up txpower settings in driver for all channels */
3845         if (iwl3945_txpower_set_from_eeprom(priv)) {
3846                 ret = -EIO;
3847                 goto err_free_channel_map;
3848         }
3849
3850         ret = iwlcore_init_geos(priv);
3851         if (ret) {
3852                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3853                 goto err_free_channel_map;
3854         }
3855         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3856
3857         return 0;
3858
3859 err_free_channel_map:
3860         iwl_free_channel_map(priv);
3861 err:
3862         return ret;
3863 }
3864
3865 #define IWL3945_MAX_PROBE_REQUEST       200
3866
3867 static int iwl3945_setup_mac(struct iwl_priv *priv)
3868 {
3869         int ret;
3870         struct ieee80211_hw *hw = priv->hw;
3871
3872         hw->rate_control_algorithm = "iwl-3945-rs";
3873         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3874         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3875
3876         /* Tell mac80211 our characteristics */
3877         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3878                     IEEE80211_HW_SPECTRUM_MGMT;
3879
3880         if (!priv->cfg->broken_powersave)
3881                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3882                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3883
3884         hw->wiphy->interface_modes =
3885                 BIT(NL80211_IFTYPE_STATION) |
3886                 BIT(NL80211_IFTYPE_ADHOC);
3887
3888         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3889                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3890
3891         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3892         /* we create the 802.11 header and a zero-length SSID element */
3893         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3894
3895         /* Default value; 4 EDCA QOS priorities */
3896         hw->queues = 4;
3897
3898         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3899                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3900                         &priv->bands[IEEE80211_BAND_2GHZ];
3901
3902         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3903                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3904                         &priv->bands[IEEE80211_BAND_5GHZ];
3905
3906         ret = ieee80211_register_hw(priv->hw);
3907         if (ret) {
3908                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3909                 return ret;
3910         }
3911         priv->mac80211_registered = 1;
3912
3913         return 0;
3914 }
3915
3916 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3917 {
3918         int err = 0;
3919         struct iwl_priv *priv;
3920         struct ieee80211_hw *hw;
3921         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3922         struct iwl3945_eeprom *eeprom;
3923         unsigned long flags;
3924
3925         /***********************
3926          * 1. Allocating HW data
3927          * ********************/
3928
3929         /* mac80211 allocates memory for this device instance, including
3930          *   space for this driver's private structure */
3931         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3932         if (hw == NULL) {
3933                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3934                 err = -ENOMEM;
3935                 goto out;
3936         }
3937         priv = hw->priv;
3938         SET_IEEE80211_DEV(hw, &pdev->dev);
3939
3940         /*
3941          * Disabling hardware scan means that mac80211 will perform scans
3942          * "the hard way", rather than using device's scan.
3943          */
3944         if (iwl3945_mod_params.disable_hw_scan) {
3945                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3946                 iwl3945_hw_ops.hw_scan = NULL;
3947         }
3948
3949
3950         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3951         priv->cfg = cfg;
3952         priv->pci_dev = pdev;
3953         priv->inta_mask = CSR_INI_SET_MASK;
3954
3955 #ifdef CONFIG_IWLWIFI_DEBUG
3956         atomic_set(&priv->restrict_refcnt, 0);
3957 #endif
3958         if (iwl_alloc_traffic_mem(priv))
3959                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3960
3961         /***************************
3962          * 2. Initializing PCI bus
3963          * *************************/
3964         if (pci_enable_device(pdev)) {
3965                 err = -ENODEV;
3966                 goto out_ieee80211_free_hw;
3967         }
3968
3969         pci_set_master(pdev);
3970
3971         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3972         if (!err)
3973                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3974         if (err) {
3975                 IWL_WARN(priv, "No suitable DMA available.\n");
3976                 goto out_pci_disable_device;
3977         }
3978
3979         pci_set_drvdata(pdev, priv);
3980         err = pci_request_regions(pdev, DRV_NAME);
3981         if (err)
3982                 goto out_pci_disable_device;
3983
3984         /***********************
3985          * 3. Read REV Register
3986          * ********************/
3987         priv->hw_base = pci_iomap(pdev, 0, 0);
3988         if (!priv->hw_base) {
3989                 err = -ENODEV;
3990                 goto out_pci_release_regions;
3991         }
3992
3993         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3994                         (unsigned long long) pci_resource_len(pdev, 0));
3995         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3996
3997         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3998          * PCI Tx retries from interfering with C3 CPU state */
3999         pci_write_config_byte(pdev, 0x41, 0x00);
4000
4001         /* these spin locks will be used in apm_ops.init and EEPROM access
4002          * we should init now
4003          */
4004         spin_lock_init(&priv->reg_lock);
4005         spin_lock_init(&priv->lock);
4006
4007         /*
4008          * stop and reset the on-board processor just in case it is in a
4009          * strange state ... like being left stranded by a primary kernel
4010          * and this is now the kdump kernel trying to start up
4011          */
4012         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4013
4014         /***********************
4015          * 4. Read EEPROM
4016          * ********************/
4017
4018         /* Read the EEPROM */
4019         err = iwl_eeprom_init(priv);
4020         if (err) {
4021                 IWL_ERR(priv, "Unable to init EEPROM\n");
4022                 goto out_iounmap;
4023         }
4024         /* MAC Address location in EEPROM same for 3945/4965 */
4025         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4026         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4027         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4028         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4029
4030         /***********************
4031          * 5. Setup HW Constants
4032          * ********************/
4033         /* Device-specific setup */
4034         if (iwl3945_hw_set_hw_params(priv)) {
4035                 IWL_ERR(priv, "failed to set hw settings\n");
4036                 goto out_eeprom_free;
4037         }
4038
4039         /***********************
4040          * 6. Setup priv
4041          * ********************/
4042
4043         err = iwl3945_init_drv(priv);
4044         if (err) {
4045                 IWL_ERR(priv, "initializing driver failed\n");
4046                 goto out_unset_hw_params;
4047         }
4048
4049         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4050                 priv->cfg->name);
4051
4052         /***********************
4053          * 7. Setup Services
4054          * ********************/
4055
4056         spin_lock_irqsave(&priv->lock, flags);
4057         iwl_disable_interrupts(priv);
4058         spin_unlock_irqrestore(&priv->lock, flags);
4059
4060         pci_enable_msi(priv->pci_dev);
4061
4062         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4063                           IRQF_SHARED, DRV_NAME, priv);
4064         if (err) {
4065                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4066                 goto out_disable_msi;
4067         }
4068
4069         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4070         if (err) {
4071                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4072                 goto out_release_irq;
4073         }
4074
4075         iwl_set_rxon_channel(priv,
4076                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4077         iwl3945_setup_deferred_work(priv);
4078         iwl3945_setup_rx_handlers(priv);
4079         iwl_power_initialize(priv);
4080
4081         /*********************************
4082          * 8. Setup and Register mac80211
4083          * *******************************/
4084
4085         iwl_enable_interrupts(priv);
4086
4087         err = iwl3945_setup_mac(priv);
4088         if (err)
4089                 goto  out_remove_sysfs;
4090
4091         err = iwl_dbgfs_register(priv, DRV_NAME);
4092         if (err)
4093                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4094
4095         /* Start monitoring the killswitch */
4096         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4097                            2 * HZ);
4098
4099         return 0;
4100
4101  out_remove_sysfs:
4102         destroy_workqueue(priv->workqueue);
4103         priv->workqueue = NULL;
4104         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4105  out_release_irq:
4106         free_irq(priv->pci_dev->irq, priv);
4107  out_disable_msi:
4108         pci_disable_msi(priv->pci_dev);
4109         iwlcore_free_geos(priv);
4110         iwl_free_channel_map(priv);
4111  out_unset_hw_params:
4112         iwl3945_unset_hw_params(priv);
4113  out_eeprom_free:
4114         iwl_eeprom_free(priv);
4115  out_iounmap:
4116         pci_iounmap(pdev, priv->hw_base);
4117  out_pci_release_regions:
4118         pci_release_regions(pdev);
4119  out_pci_disable_device:
4120         pci_set_drvdata(pdev, NULL);
4121         pci_disable_device(pdev);
4122  out_ieee80211_free_hw:
4123         iwl_free_traffic_mem(priv);
4124         ieee80211_free_hw(priv->hw);
4125  out:
4126         return err;
4127 }
4128
4129 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4130 {
4131         struct iwl_priv *priv = pci_get_drvdata(pdev);
4132         unsigned long flags;
4133
4134         if (!priv)
4135                 return;
4136
4137         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4138
4139         iwl_dbgfs_unregister(priv);
4140
4141         set_bit(STATUS_EXIT_PENDING, &priv->status);
4142
4143         if (priv->mac80211_registered) {
4144                 ieee80211_unregister_hw(priv->hw);
4145                 priv->mac80211_registered = 0;
4146         } else {
4147                 iwl3945_down(priv);
4148         }
4149
4150         /*
4151          * Make sure device is reset to low power before unloading driver.
4152          * This may be redundant with iwl_down(), but there are paths to
4153          * run iwl_down() without calling apm_ops.stop(), and there are
4154          * paths to avoid running iwl_down() at all before leaving driver.
4155          * This (inexpensive) call *makes sure* device is reset.
4156          */
4157         priv->cfg->ops->lib->apm_ops.stop(priv);
4158
4159         /* make sure we flush any pending irq or
4160          * tasklet for the driver
4161          */
4162         spin_lock_irqsave(&priv->lock, flags);
4163         iwl_disable_interrupts(priv);
4164         spin_unlock_irqrestore(&priv->lock, flags);
4165
4166         iwl_synchronize_irq(priv);
4167
4168         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4169
4170         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4171
4172         iwl3945_dealloc_ucode_pci(priv);
4173
4174         if (priv->rxq.bd)
4175                 iwl3945_rx_queue_free(priv, &priv->rxq);
4176         iwl3945_hw_txq_ctx_free(priv);
4177
4178         iwl3945_unset_hw_params(priv);
4179
4180         /*netif_stop_queue(dev); */
4181         flush_workqueue(priv->workqueue);
4182
4183         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4184          * priv->workqueue... so we can't take down the workqueue
4185          * until now... */
4186         destroy_workqueue(priv->workqueue);
4187         priv->workqueue = NULL;
4188         iwl_free_traffic_mem(priv);
4189
4190         free_irq(pdev->irq, priv);
4191         pci_disable_msi(pdev);
4192
4193         pci_iounmap(pdev, priv->hw_base);
4194         pci_release_regions(pdev);
4195         pci_disable_device(pdev);
4196         pci_set_drvdata(pdev, NULL);
4197
4198         iwl_free_channel_map(priv);
4199         iwlcore_free_geos(priv);
4200         kfree(priv->scan_cmd);
4201         if (priv->ibss_beacon)
4202                 dev_kfree_skb(priv->ibss_beacon);
4203
4204         ieee80211_free_hw(priv->hw);
4205 }
4206
4207
4208 /*****************************************************************************
4209  *
4210  * driver and module entry point
4211  *
4212  *****************************************************************************/
4213
4214 static struct pci_driver iwl3945_driver = {
4215         .name = DRV_NAME,
4216         .id_table = iwl3945_hw_card_ids,
4217         .probe = iwl3945_pci_probe,
4218         .remove = __devexit_p(iwl3945_pci_remove),
4219 #ifdef CONFIG_PM
4220         .suspend = iwl_pci_suspend,
4221         .resume = iwl_pci_resume,
4222 #endif
4223 };
4224
4225 static int __init iwl3945_init(void)
4226 {
4227
4228         int ret;
4229         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4230         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4231
4232         ret = iwl3945_rate_control_register();
4233         if (ret) {
4234                 printk(KERN_ERR DRV_NAME
4235                        "Unable to register rate control algorithm: %d\n", ret);
4236                 return ret;
4237         }
4238
4239         ret = pci_register_driver(&iwl3945_driver);
4240         if (ret) {
4241                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4242                 goto error_register;
4243         }
4244
4245         return ret;
4246
4247 error_register:
4248         iwl3945_rate_control_unregister();
4249         return ret;
4250 }
4251
4252 static void __exit iwl3945_exit(void)
4253 {
4254         pci_unregister_driver(&iwl3945_driver);
4255         iwl3945_rate_control_unregister();
4256 }
4257
4258 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4259
4260 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4261 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4262 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4263 MODULE_PARM_DESC(swcrypto,
4264                  "using software crypto (default 1 [software])\n");
4265 #ifdef CONFIG_IWLWIFI_DEBUG
4266 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4267 MODULE_PARM_DESC(debug, "debug output mask");
4268 #endif
4269 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4270                    int, S_IRUGO);
4271 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4272 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4273 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4274
4275 module_exit(iwl3945_exit);
4276 module_init(iwl3945_init);