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-helpers.h"
  57 #include "iwl-core.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->shared_virt)
 355                 pci_free_consistent(priv->pci_dev,
 356                                     sizeof(struct iwl3945_shared),
 357                                     priv->shared_virt,
 358                                     priv->shared_phys);
 359 }
 360
 361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 362                                       struct ieee80211_tx_info *info,
 363                                       struct iwl_device_cmd *cmd,
 364                                       struct sk_buff *skb_frag,
 365                                       int sta_id)
 366 {
 367         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 368         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 369
 370         switch (keyinfo->alg) {
 371         case ALG_CCMP:
 372                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 373                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 374                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 375                 break;
 376
 377         case ALG_TKIP:
 378                 break;
 379
 380         case ALG_WEP:
 381                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 382                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 383
 384                 if (keyinfo->keylen == 13)
 385                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 386
 387                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 388
 389                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 390                              "with key %d\n", info->control.hw_key->hw_key_idx);
 391                 break;
 392
 393         default:
 394                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 395                 break;
 396         }
 397 }
 398
 399 /*
 400  * handle build REPLY_TX command notification.
 401  */
 402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 403                                   struct iwl_device_cmd *cmd,
 404                                   struct ieee80211_tx_info *info,
 405                                   struct ieee80211_hdr *hdr, u8 std_id)
 406 {
 407         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 408         __le32 tx_flags = tx_cmd->tx_flags;
 409         __le16 fc = hdr->frame_control;
 410
 411         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 412         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 413                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 414                 if (ieee80211_is_mgmt(fc))
 415                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 416                 if (ieee80211_is_probe_resp(fc) &&
 417                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 418                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 419         } else {
 420                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422         }
 423
 424         tx_cmd->sta_id = std_id;
 425         if (ieee80211_has_morefrags(fc))
 426                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 427
 428         if (ieee80211_is_data_qos(fc)) {
 429                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 430                 tx_cmd->tid_tspec = qc[0] & 0xf;
 431                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 432         } else {
 433                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 434         }
 435
 436         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 437
 438         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 439                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 440
 441         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 442         if (ieee80211_is_mgmt(fc)) {
 443                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 444                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 445                 else
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 447         } else {
 448                 tx_cmd->timeout.pm_frame_timeout = 0;
 449         }
 450
 451         tx_cmd->driver_txop = 0;
 452         tx_cmd->tx_flags = tx_flags;
 453         tx_cmd->next_frame_len = 0;
 454 }
 455
 456 /*
 457  * start REPLY_TX command process
 458  */
 459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 460 {
 461         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 462         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 463         struct iwl3945_tx_cmd *tx_cmd;
 464         struct iwl_tx_queue *txq = NULL;
 465         struct iwl_queue *q = NULL;
 466         struct iwl_device_cmd *out_cmd;
 467         struct iwl_cmd_meta *out_meta;
 468         dma_addr_t phys_addr;
 469         dma_addr_t txcmd_phys;
 470         int txq_id = skb_get_queue_mapping(skb);
 471         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 472         u8 id;
 473         u8 unicast;
 474         u8 sta_id;
 475         u8 tid = 0;
 476         u16 seq_number = 0;
 477         __le16 fc;
 478         u8 wait_write_ptr = 0;
 479         u8 *qc = NULL;
 480         unsigned long flags;
 481         int rc;
 482
 483         spin_lock_irqsave(&priv->lock, flags);
 484         if (iwl_is_rfkill(priv)) {
 485                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 486                 goto drop_unlock;
 487         }
 488
 489         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 490                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 491                 goto drop_unlock;
 492         }
 493
 494         unicast = !is_multicast_ether_addr(hdr->addr1);
 495         id = 0;
 496
 497         fc = hdr->frame_control;
 498
 499 #ifdef CONFIG_IWLWIFI_DEBUG
 500         if (ieee80211_is_auth(fc))
 501                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 502         else if (ieee80211_is_assoc_req(fc))
 503                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 504         else if (ieee80211_is_reassoc_req(fc))
 505                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 506 #endif
 507
 508         /* drop all non-injected data frame if we are not associated */
 509         if (ieee80211_is_data(fc) &&
 510             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 511             (!iwl_is_associated(priv) ||
 512              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 513                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 514                 goto drop_unlock;
 515         }
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518
 519         hdr_len = ieee80211_hdrlen(fc);
 520
 521         /* Find (or create) index into station table for destination station */
 522         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 523                 sta_id = priv->hw_params.bcast_sta_id;
 524         else
 525                 sta_id = iwl_get_sta_id(priv, hdr);
 526         if (sta_id == IWL_INVALID_STATION) {
 527                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 528                                hdr->addr1);
 529                 goto drop;
 530         }
 531
 532         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 533
 534         if (ieee80211_is_data_qos(fc)) {
 535                 qc = ieee80211_get_qos_ctl(hdr);
 536                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 537                 if (unlikely(tid >= MAX_TID_COUNT))
 538                         goto drop;
 539                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 540                                 IEEE80211_SCTL_SEQ;
 541                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 542                         (hdr->seq_ctrl &
 543                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 544                 seq_number += 0x10;
 545         }
 546
 547         /* Descriptor for chosen Tx queue */
 548         txq = &priv->txq[txq_id];
 549         q = &txq->q;
 550
 551         if ((iwl_queue_space(q) < q->high_mark))
 552                 goto drop;
 553
 554         spin_lock_irqsave(&priv->lock, flags);
 555
 556         idx = get_cmd_index(q, q->write_ptr, 0);
 557
 558         /* Set up driver data for this TFD */
 559         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 560         txq->txb[q->write_ptr].skb[0] = skb;
 561
 562         /* Init first empty entry in queue's array of Tx/cmd buffers */
 563         out_cmd = txq->cmd[idx];
 564         out_meta = &txq->meta[idx];
 565         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 566         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 567         memset(tx_cmd, 0, sizeof(*tx_cmd));
 568
 569         /*
 570          * Set up the Tx-command (not MAC!) header.
 571          * Store the chosen Tx queue and TFD index within the sequence field;
 572          * after Tx, uCode's Tx response will return this value so driver can
 573          * locate the frame within the tx queue and do post-tx processing.
 574          */
 575         out_cmd->hdr.cmd = REPLY_TX;
 576         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 577                                 INDEX_TO_SEQ(q->write_ptr)));
 578
 579         /* Copy MAC header from skb into command buffer */
 580         memcpy(tx_cmd->hdr, hdr, hdr_len);
 581
 582
 583         if (info->control.hw_key)
 584                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 585
 586         /* TODO need this for burst mode later on */
 587         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 588
 589         /* set is_hcca to 0; it probably will never be implemented */
 590         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 591
 592         /* Total # bytes to be transmitted */
 593         len = (u16)skb->len;
 594         tx_cmd->len = cpu_to_le16(len);
 595
 596         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 597         iwl_update_stats(priv, true, fc, len);
 598         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 599         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 600
 601         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 602                 txq->need_update = 1;
 603                 if (qc)
 604                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 605         } else {
 606                 wait_write_ptr = 1;
 607                 txq->need_update = 0;
 608         }
 609
 610         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 611                      le16_to_cpu(out_cmd->hdr.sequence));
 612         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
 613         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 614         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 615                            ieee80211_hdrlen(fc));
 616
 617         /*
 618          * Use the first empty entry in this queue's command buffer array
 619          * to contain the Tx command and MAC header concatenated together
 620          * (payload data will be in another buffer).
 621          * Size of this varies, due to varying MAC header length.
 622          * If end is not dword aligned, we'll have 2 extra bytes at the end
 623          * of the MAC header (device reads on dword boundaries).
 624          * We'll tell device about this padding later.
 625          */
 626         len = sizeof(struct iwl3945_tx_cmd) +
 627                         sizeof(struct iwl_cmd_header) + hdr_len;
 628
 629         len_org = len;
 630         len = (len + 3) & ~3;
 631
 632         if (len_org != len)
 633                 len_org = 1;
 634         else
 635                 len_org = 0;
 636
 637         /* Physical address of this Tx command's header (not MAC header!),
 638          * within command buffer array. */
 639         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 640                                     len, PCI_DMA_TODEVICE);
 641         /* we do not map meta data ... so we can safely access address to
 642          * provide to unmap command*/
 643         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 644         pci_unmap_len_set(out_meta, len, len);
 645
 646         /* Add buffer containing Tx command and MAC(!) header to TFD's
 647          * first entry */
 648         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 649                                                    txcmd_phys, len, 1, 0);
 650
 651
 652         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 653          * if any (802.11 null frames have no payload). */
 654         len = skb->len - hdr_len;
 655         if (len) {
 656                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 657                                            len, PCI_DMA_TODEVICE);
 658                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 659                                                            phys_addr, len,
 660                                                            0, U32_PAD(len));
 661         }
 662
 663
 664         /* Tell device the write index *just past* this latest filled TFD */
 665         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 666         rc = iwl_txq_update_write_ptr(priv, txq);
 667         spin_unlock_irqrestore(&priv->lock, flags);
 668
 669         if (rc)
 670                 return rc;
 671
 672         if ((iwl_queue_space(q) < q->high_mark)
 673             && priv->mac80211_registered) {
 674                 if (wait_write_ptr) {
 675                         spin_lock_irqsave(&priv->lock, flags);
 676                         txq->need_update = 1;
 677                         iwl_txq_update_write_ptr(priv, txq);
 678                         spin_unlock_irqrestore(&priv->lock, flags);
 679                 }
 680
 681                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 682         }
 683
 684         return 0;
 685
 686 drop_unlock:
 687         spin_unlock_irqrestore(&priv->lock, flags);
 688 drop:
 689         return -1;
 690 }
 691
 692 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 693 #define BEACON_TIME_MASK_HIGH   0xFF000000
 694 #define TIME_UNIT               1024
 695
 696 /*
 697  * extended beacon time format
 698  * time in usec will be changed into a 32-bit value in 8:24 format
 699  * the high 1 byte is the beacon counts
 700  * the lower 3 bytes is the time in usec within one beacon interval
 701  */
 702
 703 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 704 {
 705         u32 quot;
 706         u32 rem;
 707         u32 interval = beacon_interval * 1024;
 708
 709         if (!interval || !usec)
 710                 return 0;
 711
 712         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 713         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 714
 715         return (quot << 24) + rem;
 716 }
 717
 718 /* base is usually what we get from ucode with each received frame,
 719  * the same as HW timer counter counting down
 720  */
 721
 722 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 723 {
 724         u32 base_low = base & BEACON_TIME_MASK_LOW;
 725         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 726         u32 interval = beacon_interval * TIME_UNIT;
 727         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 728             (addon & BEACON_TIME_MASK_HIGH);
 729
 730         if (base_low > addon_low)
 731                 res += base_low - addon_low;
 732         else if (base_low < addon_low) {
 733                 res += interval + base_low - addon_low;
 734                 res += (1 << 24);
 735         } else
 736                 res += (1 << 24);
 737
 738         return cpu_to_le32(res);
 739 }
 740
 741 static int iwl3945_get_measurement(struct iwl_priv *priv,
 742                                struct ieee80211_measurement_params *params,
 743                                u8 type)
 744 {
 745         struct iwl_spectrum_cmd spectrum;
 746         struct iwl_rx_packet *pkt;
 747         struct iwl_host_cmd cmd = {
 748                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 749                 .data = (void *)&spectrum,
 750                 .flags = CMD_WANT_SKB,
 751         };
 752         u32 add_time = le64_to_cpu(params->start_time);
 753         int rc;
 754         int spectrum_resp_status;
 755         int duration = le16_to_cpu(params->duration);
 756
 757         if (iwl_is_associated(priv))
 758                 add_time =
 759                     iwl3945_usecs_to_beacons(
 760                         le64_to_cpu(params->start_time) - priv->last_tsf,
 761                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 762
 763         memset(&spectrum, 0, sizeof(spectrum));
 764
 765         spectrum.channel_count = cpu_to_le16(1);
 766         spectrum.flags =
 767             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 768         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 769         cmd.len = sizeof(spectrum);
 770         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 771
 772         if (iwl_is_associated(priv))
 773                 spectrum.start_time =
 774                     iwl3945_add_beacon_time(priv->last_beacon_time,
 775                                 add_time,
 776                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 777         else
 778                 spectrum.start_time = 0;
 779
 780         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 781         spectrum.channels[0].channel = params->channel;
 782         spectrum.channels[0].type = type;
 783         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 784                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 785                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 786
 787         rc = iwl_send_cmd_sync(priv, &cmd);
 788         if (rc)
 789                 return rc;
 790
 791         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 792         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 793                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 794                 rc = -EIO;
 795         }
 796
 797         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 798         switch (spectrum_resp_status) {
 799         case 0:         /* Command will be handled */
 800                 if (pkt->u.spectrum.id != 0xff) {
 801                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 802                                                 pkt->u.spectrum.id);
 803                         priv->measurement_status &= ~MEASUREMENT_READY;
 804                 }
 805                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 806                 rc = 0;
 807                 break;
 808
 809         case 1:         /* Command will not be handled */
 810                 rc = -EAGAIN;
 811                 break;
 812         }
 813
 814         iwl_free_pages(priv, cmd.reply_page);
 815
 816         return rc;
 817 }
 818
 819 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 820                                struct iwl_rx_mem_buffer *rxb)
 821 {
 822         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 823         struct iwl_alive_resp *palive;
 824         struct delayed_work *pwork;
 825
 826         palive = &pkt->u.alive_frame;
 827
 828         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 829                        "0x%01X 0x%01X\n",
 830                        palive->is_valid, palive->ver_type,
 831                        palive->ver_subtype);
 832
 833         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 834                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 835                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 836                        sizeof(struct iwl_alive_resp));
 837                 pwork = &priv->init_alive_start;
 838         } else {
 839                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 840                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 841                        sizeof(struct iwl_alive_resp));
 842                 pwork = &priv->alive_start;
 843                 iwl3945_disable_events(priv);
 844         }
 845
 846         /* We delay the ALIVE response by 5ms to
 847          * give the HW RF Kill time to activate... */
 848         if (palive->is_valid == UCODE_VALID_OK)
 849                 queue_delayed_work(priv->workqueue, pwork,
 850                                    msecs_to_jiffies(5));
 851         else
 852                 IWL_WARN(priv, "uCode did not respond OK.\n");
 853 }
 854
 855 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 856                                  struct iwl_rx_mem_buffer *rxb)
 857 {
 858 #ifdef CONFIG_IWLWIFI_DEBUG
 859         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 860 #endif
 861
 862         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 863         return;
 864 }
 865
 866 static void iwl3945_bg_beacon_update(struct work_struct *work)
 867 {
 868         struct iwl_priv *priv =
 869                 container_of(work, struct iwl_priv, beacon_update);
 870         struct sk_buff *beacon;
 871
 872         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 873         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 874
 875         if (!beacon) {
 876                 IWL_ERR(priv, "update beacon failed\n");
 877                 return;
 878         }
 879
 880         mutex_lock(&priv->mutex);
 881         /* new beacon skb is allocated every time; dispose previous.*/
 882         if (priv->ibss_beacon)
 883                 dev_kfree_skb(priv->ibss_beacon);
 884
 885         priv->ibss_beacon = beacon;
 886         mutex_unlock(&priv->mutex);
 887
 888         iwl3945_send_beacon_cmd(priv);
 889 }
 890
 891 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 892                                 struct iwl_rx_mem_buffer *rxb)
 893 {
 894 #ifdef CONFIG_IWLWIFI_DEBUG
 895         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 896         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 897         u8 rate = beacon->beacon_notify_hdr.rate;
 898
 899         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 900                 "tsf %d %d rate %d\n",
 901                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 902                 beacon->beacon_notify_hdr.failure_frame,
 903                 le32_to_cpu(beacon->ibss_mgr_status),
 904                 le32_to_cpu(beacon->high_tsf),
 905                 le32_to_cpu(beacon->low_tsf), rate);
 906 #endif
 907
 908         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 909             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 910                 queue_work(priv->workqueue, &priv->beacon_update);
 911 }
 912
 913 /* Handle notification from uCode that card's power state is changing
 914  * due to software, hardware, or critical temperature RFKILL */
 915 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 916                                     struct iwl_rx_mem_buffer *rxb)
 917 {
 918         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 919         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 920         unsigned long status = priv->status;
 921
 922         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 923                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 924                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 925
 926         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 927                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 928
 929         if (flags & HW_CARD_DISABLED)
 930                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 931         else
 932                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 933
 934
 935         iwl_scan_cancel(priv);
 936
 937         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 938              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 939                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 940                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 941         else
 942                 wake_up_interruptible(&priv->wait_command_queue);
 943 }
 944
 945 /**
 946  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 947  *
 948  * Setup the RX handlers for each of the reply types sent from the uCode
 949  * to the host.
 950  *
 951  * This function chains into the hardware specific files for them to setup
 952  * any hardware specific handlers as well.
 953  */
 954 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 955 {
 956         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 957         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 958         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 959         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 960         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 961                         iwl_rx_spectrum_measure_notif;
 962         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 963         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 964             iwl_rx_pm_debug_statistics_notif;
 965         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 966
 967         /*
 968          * The same handler is used for both the REPLY to a discrete
 969          * statistics request from the host as well as for the periodic
 970          * statistics notifications (after received beacons) from the uCode.
 971          */
 972         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 973         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 974
 975         iwl_setup_rx_scan_handlers(priv);
 976         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 977
 978         /* Set up hardware specific Rx handlers */
 979         iwl3945_hw_rx_handler_setup(priv);
 980 }
 981
 982 /************************** RX-FUNCTIONS ****************************/
 983 /*
 984  * Rx theory of operation
 985  *
 986  * The host allocates 32 DMA target addresses and passes the host address
 987  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 988  * 0 to 31
 989  *
 990  * Rx Queue Indexes
 991  * The host/firmware share two index registers for managing the Rx buffers.
 992  *
 993  * The READ index maps to the first position that the firmware may be writing
 994  * to -- the driver can read up to (but not including) this position and get
 995  * good data.
 996  * The READ index is managed by the firmware once the card is enabled.
 997  *
 998  * The WRITE index maps to the last position the driver has read from -- the
 999  * position preceding WRITE is the last slot the firmware can place a packet.
1000  *
1001  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1002  * WRITE = READ.
1003  *
1004  * During initialization, the host sets up the READ queue position to the first
1005  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1006  *
1007  * When the firmware places a packet in a buffer, it will advance the READ index
1008  * and fire the RX interrupt.  The driver can then query the READ index and
1009  * process as many packets as possible, moving the WRITE index forward as it
1010  * resets the Rx queue buffers with new memory.
1011  *
1012  * The management in the driver is as follows:
1013  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1014  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1015  *   to replenish the iwl->rxq->rx_free.
1016  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1017  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1018  *   'processed' and 'read' driver indexes as well)
1019  * + A received packet is processed and handed to the kernel network stack,
1020  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1021  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1022  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1023  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1024  *   were enough free buffers and RX_STALLED is set it is cleared.
1025  *
1026  *
1027  * Driver sequence:
1028  *
1029  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1030  *                            iwl3945_rx_queue_restock
1031  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1032  *                            queue, updates firmware pointers, and updates
1033  *                            the WRITE index.  If insufficient rx_free buffers
1034  *                            are available, schedules iwl3945_rx_replenish
1035  *
1036  * -- enable interrupts --
1037  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1038  *                            READ INDEX, detaching the SKB from the pool.
1039  *                            Moves the packet buffer from queue to rx_used.
1040  *                            Calls iwl3945_rx_queue_restock to refill any empty
1041  *                            slots.
1042  * ...
1043  *
1044  */
1045
1046 /**
1047  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1048  */
1049 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1050                                           dma_addr_t dma_addr)
1051 {
1052         return cpu_to_le32((u32)dma_addr);
1053 }
1054
1055 /**
1056  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1057  *
1058  * If there are slots in the RX queue that need to be restocked,
1059  * and we have free pre-allocated buffers, fill the ranks as much
1060  * as we can, pulling from rx_free.
1061  *
1062  * This moves the 'write' index forward to catch up with 'processed', and
1063  * also updates the memory address in the firmware to reference the new
1064  * target buffer.
1065  */
1066 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1067 {
1068         struct iwl_rx_queue *rxq = &priv->rxq;
1069         struct list_head *element;
1070         struct iwl_rx_mem_buffer *rxb;
1071         unsigned long flags;
1072         int write, rc;
1073
1074         spin_lock_irqsave(&rxq->lock, flags);
1075         write = rxq->write & ~0x7;
1076         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1077                 /* Get next free Rx buffer, remove from free list */
1078                 element = rxq->rx_free.next;
1079                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1080                 list_del(element);
1081
1082                 /* Point to Rx buffer via next RBD in circular buffer */
1083                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1084                 rxq->queue[rxq->write] = rxb;
1085                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1086                 rxq->free_count--;
1087         }
1088         spin_unlock_irqrestore(&rxq->lock, flags);
1089         /* If the pre-allocated buffer pool is dropping low, schedule to
1090          * refill it */
1091         if (rxq->free_count <= RX_LOW_WATERMARK)
1092                 queue_work(priv->workqueue, &priv->rx_replenish);
1093
1094
1095         /* If we've added more space for the firmware to place data, tell it.
1096          * Increment device's write pointer in multiples of 8. */
1097         if ((rxq->write_actual != (rxq->write & ~0x7))
1098             || (abs(rxq->write - rxq->read) > 7)) {
1099                 spin_lock_irqsave(&rxq->lock, flags);
1100                 rxq->need_update = 1;
1101                 spin_unlock_irqrestore(&rxq->lock, flags);
1102                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1103                 if (rc)
1104                         return rc;
1105         }
1106
1107         return 0;
1108 }
1109
1110 /**
1111  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1112  *
1113  * When moving to rx_free an SKB is allocated for the slot.
1114  *
1115  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1116  * This is called as a scheduled work item (except for during initialization)
1117  */
1118 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1119 {
1120         struct iwl_rx_queue *rxq = &priv->rxq;
1121         struct list_head *element;
1122         struct iwl_rx_mem_buffer *rxb;
1123         struct page *page;
1124         unsigned long flags;
1125         gfp_t gfp_mask = priority;
1126
1127         while (1) {
1128                 spin_lock_irqsave(&rxq->lock, flags);
1129
1130                 if (list_empty(&rxq->rx_used)) {
1131                         spin_unlock_irqrestore(&rxq->lock, flags);
1132                         return;
1133                 }
1134                 spin_unlock_irqrestore(&rxq->lock, flags);
1135
1136                 if (rxq->free_count > RX_LOW_WATERMARK)
1137                         gfp_mask |= __GFP_NOWARN;
1138
1139                 if (priv->hw_params.rx_page_order > 0)
1140                         gfp_mask |= __GFP_COMP;
1141
1142                 /* Alloc a new receive buffer */
1143                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1144                 if (!page) {
1145                         if (net_ratelimit())
1146                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1147                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1148                             net_ratelimit())
1149                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1150                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1151                                          rxq->free_count);
1152                         /* We don't reschedule replenish work here -- we will
1153                          * call the restock method and if it still needs
1154                          * more buffers it will schedule replenish */
1155                         break;
1156                 }
1157
1158                 spin_lock_irqsave(&rxq->lock, flags);
1159                 if (list_empty(&rxq->rx_used)) {
1160                         spin_unlock_irqrestore(&rxq->lock, flags);
1161                         __free_pages(page, priv->hw_params.rx_page_order);
1162                         return;
1163                 }
1164                 element = rxq->rx_used.next;
1165                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1166                 list_del(element);
1167                 spin_unlock_irqrestore(&rxq->lock, flags);
1168
1169                 rxb->page = page;
1170                 /* Get physical address of RB/SKB */
1171                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1172                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1173                                 PCI_DMA_FROMDEVICE);
1174
1175                 spin_lock_irqsave(&rxq->lock, flags);
1176
1177                 list_add_tail(&rxb->list, &rxq->rx_free);
1178                 rxq->free_count++;
1179                 priv->alloc_rxb_page++;
1180
1181                 spin_unlock_irqrestore(&rxq->lock, flags);
1182         }
1183 }
1184
1185 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1186 {
1187         unsigned long flags;
1188         int i;
1189         spin_lock_irqsave(&rxq->lock, flags);
1190         INIT_LIST_HEAD(&rxq->rx_free);
1191         INIT_LIST_HEAD(&rxq->rx_used);
1192         /* Fill the rx_used queue with _all_ of the Rx buffers */
1193         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1194                 /* In the reset function, these buffers may have been allocated
1195                  * to an SKB, so we need to unmap and free potential storage */
1196                 if (rxq->pool[i].page != NULL) {
1197                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1198                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1199                                 PCI_DMA_FROMDEVICE);
1200                         __iwl_free_pages(priv, rxq->pool[i].page);
1201                         rxq->pool[i].page = NULL;
1202                 }
1203                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1204         }
1205
1206         /* Set us so that we have processed and used all buffers, but have
1207          * not restocked the Rx queue with fresh buffers */
1208         rxq->read = rxq->write = 0;
1209         rxq->write_actual = 0;
1210         rxq->free_count = 0;
1211         spin_unlock_irqrestore(&rxq->lock, flags);
1212 }
1213
1214 void iwl3945_rx_replenish(void *data)
1215 {
1216         struct iwl_priv *priv = data;
1217         unsigned long flags;
1218
1219         iwl3945_rx_allocate(priv, GFP_KERNEL);
1220
1221         spin_lock_irqsave(&priv->lock, flags);
1222         iwl3945_rx_queue_restock(priv);
1223         spin_unlock_irqrestore(&priv->lock, flags);
1224 }
1225
1226 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1227 {
1228         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1229
1230         iwl3945_rx_queue_restock(priv);
1231 }
1232
1233
1234 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1235  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1236  * This free routine walks the list of POOL entries and if SKB is set to
1237  * non NULL it is unmapped and freed
1238  */
1239 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1240 {
1241         int i;
1242         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1243                 if (rxq->pool[i].page != NULL) {
1244                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1245                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1246                                 PCI_DMA_FROMDEVICE);
1247                         __iwl_free_pages(priv, rxq->pool[i].page);
1248                         rxq->pool[i].page = NULL;
1249                 }
1250         }
1251
1252         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1253                             rxq->dma_addr);
1254         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1255                             rxq->rb_stts, rxq->rb_stts_dma);
1256         rxq->bd = NULL;
1257         rxq->rb_stts  = NULL;
1258 }
1259
1260
1261 /* Convert linear signal-to-noise ratio into dB */
1262 static u8 ratio2dB[100] = {
1263 /*       0   1   2   3   4   5   6   7   8   9 */
1264          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1265         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1266         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1267         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1268         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1269         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1270         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1271         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1272         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1273         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1274 };
1275
1276 /* Calculates a relative dB value from a ratio of linear
1277  *   (i.e. not dB) signal levels.
1278  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1279 int iwl3945_calc_db_from_ratio(int sig_ratio)
1280 {
1281         /* 1000:1 or higher just report as 60 dB */
1282         if (sig_ratio >= 1000)
1283                 return 60;
1284
1285         /* 100:1 or higher, divide by 10 and use table,
1286          *   add 20 dB to make up for divide by 10 */
1287         if (sig_ratio >= 100)
1288                 return 20 + (int)ratio2dB[sig_ratio/10];
1289
1290         /* We shouldn't see this */
1291         if (sig_ratio < 1)
1292                 return 0;
1293
1294         /* Use table for ratios 1:1 - 99:1 */
1295         return (int)ratio2dB[sig_ratio];
1296 }
1297
1298 /**
1299  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1300  *
1301  * Uses the priv->rx_handlers callback function array to invoke
1302  * the appropriate handlers, including command responses,
1303  * frame-received notifications, and other notifications.
1304  */
1305 static void iwl3945_rx_handle(struct iwl_priv *priv)
1306 {
1307         struct iwl_rx_mem_buffer *rxb;
1308         struct iwl_rx_packet *pkt;
1309         struct iwl_rx_queue *rxq = &priv->rxq;
1310         u32 r, i;
1311         int reclaim;
1312         unsigned long flags;
1313         u8 fill_rx = 0;
1314         u32 count = 8;
1315         int total_empty = 0;
1316
1317         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1318          * buffer that the driver may process (last buffer filled by ucode). */
1319         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1320         i = rxq->read;
1321
1322         /* calculate total frames need to be restock after handling RX */
1323         total_empty = r - rxq->write_actual;
1324         if (total_empty < 0)
1325                 total_empty += RX_QUEUE_SIZE;
1326
1327         if (total_empty > (RX_QUEUE_SIZE / 2))
1328                 fill_rx = 1;
1329         /* Rx interrupt, but nothing sent from uCode */
1330         if (i == r)
1331                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1332
1333         while (i != r) {
1334                 rxb = rxq->queue[i];
1335
1336                 /* If an RXB doesn't have a Rx queue slot associated with it,
1337                  * then a bug has been introduced in the queue refilling
1338                  * routines -- catch it here */
1339                 BUG_ON(rxb == NULL);
1340
1341                 rxq->queue[i] = NULL;
1342
1343                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1344                                PAGE_SIZE << priv->hw_params.rx_page_order,
1345                                PCI_DMA_FROMDEVICE);
1346                 pkt = rxb_addr(rxb);
1347
1348                 trace_iwlwifi_dev_rx(priv, pkt,
1349                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1350
1351                 /* Reclaim a command buffer only if this packet is a response
1352                  *   to a (driver-originated) command.
1353                  * If the packet (e.g. Rx frame) originated from uCode,
1354                  *   there is no command buffer to reclaim.
1355                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1356                  *   but apparently a few don't get set; catch them here. */
1357                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1358                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1359                         (pkt->hdr.cmd != REPLY_TX);
1360
1361                 /* Based on type of command response or notification,
1362                  *   handle those that need handling via function in
1363                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1364                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1365                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1366                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1367                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1368                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1369                 } else {
1370                         /* No handling needed */
1371                         IWL_DEBUG_RX(priv,
1372                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1373                                 r, i, get_cmd_string(pkt->hdr.cmd),
1374                                 pkt->hdr.cmd);
1375                 }
1376
1377                 /*
1378                  * XXX: After here, we should always check rxb->page
1379                  * against NULL before touching it or its virtual
1380                  * memory (pkt). Because some rx_handler might have
1381                  * already taken or freed the pages.
1382                  */
1383
1384                 if (reclaim) {
1385                         /* Invoke any callbacks, transfer the buffer to caller,
1386                          * and fire off the (possibly) blocking iwl_send_cmd()
1387                          * as we reclaim the driver command queue */
1388                         if (rxb->page)
1389                                 iwl_tx_cmd_complete(priv, rxb);
1390                         else
1391                                 IWL_WARN(priv, "Claim null rxb?\n");
1392                 }
1393
1394                 /* Reuse the page if possible. For notification packets and
1395                  * SKBs that fail to Rx correctly, add them back into the
1396                  * rx_free list for reuse later. */
1397                 spin_lock_irqsave(&rxq->lock, flags);
1398                 if (rxb->page != NULL) {
1399                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1400                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1401                                 PCI_DMA_FROMDEVICE);
1402                         list_add_tail(&rxb->list, &rxq->rx_free);
1403                         rxq->free_count++;
1404                 } else
1405                         list_add_tail(&rxb->list, &rxq->rx_used);
1406
1407                 spin_unlock_irqrestore(&rxq->lock, flags);
1408
1409                 i = (i + 1) & RX_QUEUE_MASK;
1410                 /* If there are a lot of unused frames,
1411                  * restock the Rx queue so ucode won't assert. */
1412                 if (fill_rx) {
1413                         count++;
1414                         if (count >= 8) {
1415                                 rxq->read = i;
1416                                 iwl3945_rx_replenish_now(priv);
1417                                 count = 0;
1418                         }
1419                 }
1420         }
1421
1422         /* Backtrack one entry */
1423         rxq->read = i;
1424         if (fill_rx)
1425                 iwl3945_rx_replenish_now(priv);
1426         else
1427                 iwl3945_rx_queue_restock(priv);
1428 }
1429
1430 /* call this function to flush any scheduled tasklet */
1431 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1432 {
1433         /* wait to make sure we flush pending tasklet*/
1434         synchronize_irq(priv->pci_dev->irq);
1435         tasklet_kill(&priv->irq_tasklet);
1436 }
1437
1438 static const char *desc_lookup(int i)
1439 {
1440         switch (i) {
1441         case 1:
1442                 return "FAIL";
1443         case 2:
1444                 return "BAD_PARAM";
1445         case 3:
1446                 return "BAD_CHECKSUM";
1447         case 4:
1448                 return "NMI_INTERRUPT";
1449         case 5:
1450                 return "SYSASSERT";
1451         case 6:
1452                 return "FATAL_ERROR";
1453         }
1454
1455         return "UNKNOWN";
1456 }
1457
1458 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1459 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1460
1461 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1462 {
1463         u32 i;
1464         u32 desc, time, count, base, data1;
1465         u32 blink1, blink2, ilink1, ilink2;
1466
1467         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1468
1469         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1470                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1471                 return;
1472         }
1473
1474
1475         count = iwl_read_targ_mem(priv, base);
1476
1477         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1478                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1479                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1480                         priv->status, count);
1481         }
1482
1483         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1484                   "ilink1  nmiPC   Line\n");
1485         for (i = ERROR_START_OFFSET;
1486              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1487              i += ERROR_ELEM_SIZE) {
1488                 desc = iwl_read_targ_mem(priv, base + i);
1489                 time =
1490                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1491                 blink1 =
1492                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1493                 blink2 =
1494                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1495                 ilink1 =
1496                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1497                 ilink2 =
1498                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1499                 data1 =
1500                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1501
1502                 IWL_ERR(priv,
1503                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1504                         desc_lookup(desc), desc, time, blink1, blink2,
1505                         ilink1, ilink2, data1);
1506                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1507                                         0, blink1, blink2, ilink1, ilink2);
1508         }
1509 }
1510
1511 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1512
1513 /**
1514  * iwl3945_print_event_log - Dump error event log to syslog
1515  *
1516  */
1517 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1518                                   u32 num_events, u32 mode,
1519                                   int pos, char **buf, size_t bufsz)
1520 {
1521         u32 i;
1522         u32 base;       /* SRAM byte address of event log header */
1523         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1524         u32 ptr;        /* SRAM byte address of log data */
1525         u32 ev, time, data; /* event log data */
1526         unsigned long reg_flags;
1527
1528         if (num_events == 0)
1529                 return pos;
1530
1531         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1532
1533         if (mode == 0)
1534                 event_size = 2 * sizeof(u32);
1535         else
1536                 event_size = 3 * sizeof(u32);
1537
1538         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1539
1540         /* Make sure device is powered up for SRAM reads */
1541         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1542         iwl_grab_nic_access(priv);
1543
1544         /* Set starting address; reads will auto-increment */
1545         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1546         rmb();
1547
1548         /* "time" is actually "data" for mode 0 (no timestamp).
1549          * place event id # at far right for easier visual parsing. */
1550         for (i = 0; i < num_events; i++) {
1551                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1552                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1553                 if (mode == 0) {
1554                         /* data, ev */
1555                         if (bufsz) {
1556                                 pos += scnprintf(*buf + pos, bufsz - pos,
1557                                                 "0x%08x:%04u\n",
1558                                                 time, ev);
1559                         } else {
1560                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1561                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1562                                                               time, ev);
1563                         }
1564                 } else {
1565                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1566                         if (bufsz) {
1567                                 pos += scnprintf(*buf + pos, bufsz - pos,
1568                                                 "%010u:0x%08x:%04u\n",
1569                                                  time, data, ev);
1570                         } else {
1571                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1572                                         time, data, ev);
1573                                 trace_iwlwifi_dev_ucode_event(priv, time,
1574                                                               data, ev);
1575                         }
1576                 }
1577         }
1578
1579         /* Allow device to power down */
1580         iwl_release_nic_access(priv);
1581         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1582         return pos;
1583 }
1584
1585 /**
1586  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1587  */
1588 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1589                                       u32 num_wraps, u32 next_entry,
1590                                       u32 size, u32 mode,
1591                                       int pos, char **buf, size_t bufsz)
1592 {
1593         /*
1594          * display the newest DEFAULT_LOG_ENTRIES entries
1595          * i.e the entries just before the next ont that uCode would fill.
1596          */
1597         if (num_wraps) {
1598                 if (next_entry < size) {
1599                         pos = iwl3945_print_event_log(priv,
1600                                              capacity - (size - next_entry),
1601                                              size - next_entry, mode,
1602                                              pos, buf, bufsz);
1603                         pos = iwl3945_print_event_log(priv, 0,
1604                                                       next_entry, mode,
1605                                                       pos, buf, bufsz);
1606                 } else
1607                         pos = iwl3945_print_event_log(priv, next_entry - size,
1608                                                       size, mode,
1609                                                       pos, buf, bufsz);
1610         } else {
1611                 if (next_entry < size)
1612                         pos = iwl3945_print_event_log(priv, 0,
1613                                                       next_entry, mode,
1614                                                       pos, buf, bufsz);
1615                 else
1616                         pos = iwl3945_print_event_log(priv, next_entry - size,
1617                                                       size, mode,
1618                                                       pos, buf, bufsz);
1619         }
1620         return pos;
1621 }
1622
1623 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1624 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1625
1626 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1627
1628 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1629                             char **buf, bool display)
1630 {
1631         u32 base;       /* SRAM byte address of event log header */
1632         u32 capacity;   /* event log capacity in # entries */
1633         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1634         u32 num_wraps;  /* # times uCode wrapped to top of log */
1635         u32 next_entry; /* index of next entry to be written by uCode */
1636         u32 size;       /* # entries that we'll print */
1637         int pos = 0;
1638         size_t bufsz = 0;
1639
1640         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1641         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1642                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1643                 return  -EINVAL;
1644         }
1645
1646         /* event log header */
1647         capacity = iwl_read_targ_mem(priv, base);
1648         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1649         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1650         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1651
1652         if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1653                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1654                         capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1655                 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1656         }
1657
1658         if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1659                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1660                         next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1661                 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1662         }
1663
1664         size = num_wraps ? capacity : next_entry;
1665
1666         /* bail out if nothing in log */
1667         if (size == 0) {
1668                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1669                 return pos;
1670         }
1671
1672 #ifdef CONFIG_IWLWIFI_DEBUG
1673         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1674                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1675                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1676 #else
1677         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1678                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1679 #endif
1680
1681         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1682                   size);
1683
1684 #ifdef CONFIG_IWLWIFI_DEBUG
1685         if (display) {
1686                 if (full_log)
1687                         bufsz = capacity * 48;
1688                 else
1689                         bufsz = size * 48;
1690                 *buf = kmalloc(bufsz, GFP_KERNEL);
1691                 if (!*buf)
1692                         return -ENOMEM;
1693         }
1694         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1695                 /* if uCode has wrapped back to top of log,
1696                  * start at the oldest entry,
1697                  * i.e the next one that uCode would fill.
1698                  */
1699                 if (num_wraps)
1700                         pos = iwl3945_print_event_log(priv, next_entry,
1701                                                 capacity - next_entry, mode,
1702                                                 pos, buf, bufsz);
1703
1704                 /* (then/else) start at top of log */
1705                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1706                                               pos, buf, bufsz);
1707         } else
1708                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1709                                                     next_entry, size, mode,
1710                                                     pos, buf, bufsz);
1711 #else
1712         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1713                                             next_entry, size, mode,
1714                                             pos, buf, bufsz);
1715 #endif
1716         return pos;
1717 }
1718
1719 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1720 {
1721         u32 inta, handled = 0;
1722         u32 inta_fh;
1723         unsigned long flags;
1724 #ifdef CONFIG_IWLWIFI_DEBUG
1725         u32 inta_mask;
1726 #endif
1727
1728         spin_lock_irqsave(&priv->lock, flags);
1729
1730         /* Ack/clear/reset pending uCode interrupts.
1731          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1732          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1733         inta = iwl_read32(priv, CSR_INT);
1734         iwl_write32(priv, CSR_INT, inta);
1735
1736         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1737          * Any new interrupts that happen after this, either while we're
1738          * in this tasklet, or later, will show up in next ISR/tasklet. */
1739         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1740         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1741
1742 #ifdef CONFIG_IWLWIFI_DEBUG
1743         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1744                 /* just for debug */
1745                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1746                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1747                               inta, inta_mask, inta_fh);
1748         }
1749 #endif
1750
1751         spin_unlock_irqrestore(&priv->lock, flags);
1752
1753         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1754          * atomic, make sure that inta covers all the interrupts that
1755          * we've discovered, even if FH interrupt came in just after
1756          * reading CSR_INT. */
1757         if (inta_fh & CSR39_FH_INT_RX_MASK)
1758                 inta |= CSR_INT_BIT_FH_RX;
1759         if (inta_fh & CSR39_FH_INT_TX_MASK)
1760                 inta |= CSR_INT_BIT_FH_TX;
1761
1762         /* Now service all interrupt bits discovered above. */
1763         if (inta & CSR_INT_BIT_HW_ERR) {
1764                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1765
1766                 /* Tell the device to stop sending interrupts */
1767                 iwl_disable_interrupts(priv);
1768
1769                 priv->isr_stats.hw++;
1770                 iwl_irq_handle_error(priv);
1771
1772                 handled |= CSR_INT_BIT_HW_ERR;
1773
1774                 return;
1775         }
1776
1777 #ifdef CONFIG_IWLWIFI_DEBUG
1778         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1779                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1780                 if (inta & CSR_INT_BIT_SCD) {
1781                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1782                                       "the frame/frames.\n");
1783                         priv->isr_stats.sch++;
1784                 }
1785
1786                 /* Alive notification via Rx interrupt will do the real work */
1787                 if (inta & CSR_INT_BIT_ALIVE) {
1788                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1789                         priv->isr_stats.alive++;
1790                 }
1791         }
1792 #endif
1793         /* Safely ignore these bits for debug checks below */
1794         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1795
1796         /* Error detected by uCode */
1797         if (inta & CSR_INT_BIT_SW_ERR) {
1798                 IWL_ERR(priv, "Microcode SW error detected. "
1799                         "Restarting 0x%X.\n", inta);
1800                 priv->isr_stats.sw++;
1801                 priv->isr_stats.sw_err = inta;
1802                 iwl_irq_handle_error(priv);
1803                 handled |= CSR_INT_BIT_SW_ERR;
1804         }
1805
1806         /* uCode wakes up after power-down sleep */
1807         if (inta & CSR_INT_BIT_WAKEUP) {
1808                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1809                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1810                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1811                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1812                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1813                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1814                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1815                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1816
1817                 priv->isr_stats.wakeup++;
1818                 handled |= CSR_INT_BIT_WAKEUP;
1819         }
1820
1821         /* All uCode command responses, including Tx command responses,
1822          * Rx "responses" (frame-received notification), and other
1823          * notifications from uCode come through here*/
1824         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1825                 iwl3945_rx_handle(priv);
1826                 priv->isr_stats.rx++;
1827                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1828         }
1829
1830         if (inta & CSR_INT_BIT_FH_TX) {
1831                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1832                 priv->isr_stats.tx++;
1833
1834                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1835                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1836                                         (FH39_SRVC_CHNL), 0x0);
1837                 handled |= CSR_INT_BIT_FH_TX;
1838         }
1839
1840         if (inta & ~handled) {
1841                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1842                 priv->isr_stats.unhandled++;
1843         }
1844
1845         if (inta & ~priv->inta_mask) {
1846                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1847                          inta & ~priv->inta_mask);
1848                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1849         }
1850
1851         /* Re-enable all interrupts */
1852         /* only Re-enable if disabled by irq */
1853         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1854                 iwl_enable_interrupts(priv);
1855
1856 #ifdef CONFIG_IWLWIFI_DEBUG
1857         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1858                 inta = iwl_read32(priv, CSR_INT);
1859                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1860                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1861                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1862                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1863         }
1864 #endif
1865 }
1866
1867 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1868                                          enum ieee80211_band band,
1869                                      u8 is_active, u8 n_probes,
1870                                      struct iwl3945_scan_channel *scan_ch)
1871 {
1872         struct ieee80211_channel *chan;
1873         const struct ieee80211_supported_band *sband;
1874         const struct iwl_channel_info *ch_info;
1875         u16 passive_dwell = 0;
1876         u16 active_dwell = 0;
1877         int added, i;
1878
1879         sband = iwl_get_hw_mode(priv, band);
1880         if (!sband)
1881                 return 0;
1882
1883         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1884         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1885
1886         if (passive_dwell <= active_dwell)
1887                 passive_dwell = active_dwell + 1;
1888
1889         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1890                 chan = priv->scan_request->channels[i];
1891
1892                 if (chan->band != band)
1893                         continue;
1894
1895                 scan_ch->channel = chan->hw_value;
1896
1897                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1898                 if (!is_channel_valid(ch_info)) {
1899                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1900                                        scan_ch->channel);
1901                         continue;
1902                 }
1903
1904                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1905                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1906                 /* If passive , set up for auto-switch
1907                  *  and use long active_dwell time.
1908                  */
1909                 if (!is_active || is_channel_passive(ch_info) ||
1910                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1911                         scan_ch->type = 0;      /* passive */
1912                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1913                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1914                 } else {
1915                         scan_ch->type = 1;      /* active */
1916                 }
1917
1918                 /* Set direct probe bits. These may be used both for active
1919                  * scan channels (probes gets sent right away),
1920                  * or for passive channels (probes get se sent only after
1921                  * hearing clear Rx packet).*/
1922                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1923                         if (n_probes)
1924                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1925                 } else {
1926                         /* uCode v1 does not allow setting direct probe bits on
1927                          * passive channel. */
1928                         if ((scan_ch->type & 1) && n_probes)
1929                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1930                 }
1931
1932                 /* Set txpower levels to defaults */
1933                 scan_ch->tpc.dsp_atten = 110;
1934                 /* scan_pwr_info->tpc.dsp_atten; */
1935
1936                 /*scan_pwr_info->tpc.tx_gain; */
1937                 if (band == IEEE80211_BAND_5GHZ)
1938                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1939                 else {
1940                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1941                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1942                          * power level:
1943                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1944                          */
1945                 }
1946
1947                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1948                                scan_ch->channel,
1949                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1950                                (scan_ch->type & 1) ?
1951                                active_dwell : passive_dwell);
1952
1953                 scan_ch++;
1954                 added++;
1955         }
1956
1957         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1958         return added;
1959 }
1960
1961 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1962                               struct ieee80211_rate *rates)
1963 {
1964         int i;
1965
1966         for (i = 0; i < IWL_RATE_COUNT; i++) {
1967                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1968                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1969                 rates[i].hw_value_short = i;
1970                 rates[i].flags = 0;
1971                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1972                         /*
1973                          * If CCK != 1M then set short preamble rate flag.
1974                          */
1975                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1976                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1977                 }
1978         }
1979 }
1980
1981 /******************************************************************************
1982  *
1983  * uCode download functions
1984  *
1985  ******************************************************************************/
1986
1987 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1988 {
1989         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1990         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1991         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1992         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1993         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1994         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1995 }
1996
1997 /**
1998  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1999  *     looking at all data.
2000  */
2001 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2002 {
2003         u32 val;
2004         u32 save_len = len;
2005         int rc = 0;
2006         u32 errcnt;
2007
2008         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2009
2010         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2011                                IWL39_RTC_INST_LOWER_BOUND);
2012
2013         errcnt = 0;
2014         for (; len > 0; len -= sizeof(u32), image++) {
2015                 /* read data comes through single port, auto-incr addr */
2016                 /* NOTE: Use the debugless read so we don't flood kernel log
2017                  * if IWL_DL_IO is set */
2018                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2019                 if (val != le32_to_cpu(*image)) {
2020                         IWL_ERR(priv, "uCode INST section is invalid at "
2021                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2022                                   save_len - len, val, le32_to_cpu(*image));
2023                         rc = -EIO;
2024                         errcnt++;
2025                         if (errcnt >= 20)
2026                                 break;
2027                 }
2028         }
2029
2030
2031         if (!errcnt)
2032                 IWL_DEBUG_INFO(priv,
2033                         "ucode image in INSTRUCTION memory is good\n");
2034
2035         return rc;
2036 }
2037
2038
2039 /**
2040  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2041  *   using sample data 100 bytes apart.  If these sample points are good,
2042  *   it's a pretty good bet that everything between them is good, too.
2043  */
2044 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2045 {
2046         u32 val;
2047         int rc = 0;
2048         u32 errcnt = 0;
2049         u32 i;
2050
2051         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2052
2053         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2054                 /* read data comes through single port, auto-incr addr */
2055                 /* NOTE: Use the debugless read so we don't flood kernel log
2056                  * if IWL_DL_IO is set */
2057                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2058                         i + IWL39_RTC_INST_LOWER_BOUND);
2059                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2060                 if (val != le32_to_cpu(*image)) {
2061 #if 0 /* Enable this if you want to see details */
2062                         IWL_ERR(priv, "uCode INST section is invalid at "
2063                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2064                                   i, val, *image);
2065 #endif
2066                         rc = -EIO;
2067                         errcnt++;
2068                         if (errcnt >= 3)
2069                                 break;
2070                 }
2071         }
2072
2073         return rc;
2074 }
2075
2076
2077 /**
2078  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2079  *    and verify its contents
2080  */
2081 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2082 {
2083         __le32 *image;
2084         u32 len;
2085         int rc = 0;
2086
2087         /* Try bootstrap */
2088         image = (__le32 *)priv->ucode_boot.v_addr;
2089         len = priv->ucode_boot.len;
2090         rc = iwl3945_verify_inst_sparse(priv, image, len);
2091         if (rc == 0) {
2092                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2093                 return 0;
2094         }
2095
2096         /* Try initialize */
2097         image = (__le32 *)priv->ucode_init.v_addr;
2098         len = priv->ucode_init.len;
2099         rc = iwl3945_verify_inst_sparse(priv, image, len);
2100         if (rc == 0) {
2101                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2102                 return 0;
2103         }
2104
2105         /* Try runtime/protocol */
2106         image = (__le32 *)priv->ucode_code.v_addr;
2107         len = priv->ucode_code.len;
2108         rc = iwl3945_verify_inst_sparse(priv, image, len);
2109         if (rc == 0) {
2110                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2111                 return 0;
2112         }
2113
2114         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2115
2116         /* Since nothing seems to match, show first several data entries in
2117          * instruction SRAM, so maybe visual inspection will give a clue.
2118          * Selection of bootstrap image (vs. other images) is arbitrary. */
2119         image = (__le32 *)priv->ucode_boot.v_addr;
2120         len = priv->ucode_boot.len;
2121         rc = iwl3945_verify_inst_full(priv, image, len);
2122
2123         return rc;
2124 }
2125
2126 static void iwl3945_nic_start(struct iwl_priv *priv)
2127 {
2128         /* Remove all resets to allow NIC to operate */
2129         iwl_write32(priv, CSR_RESET, 0);
2130 }
2131
2132 /**
2133  * iwl3945_read_ucode - Read uCode images from disk file.
2134  *
2135  * Copy into buffers for card to fetch via bus-mastering
2136  */
2137 static int iwl3945_read_ucode(struct iwl_priv *priv)
2138 {
2139         const struct iwl_ucode_header *ucode;
2140         int ret = -EINVAL, index;
2141         const struct firmware *ucode_raw;
2142         /* firmware file name contains uCode/driver compatibility version */
2143         const char *name_pre = priv->cfg->fw_name_pre;
2144         const unsigned int api_max = priv->cfg->ucode_api_max;
2145         const unsigned int api_min = priv->cfg->ucode_api_min;
2146         char buf[25];
2147         u8 *src;
2148         size_t len;
2149         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2150
2151         /* Ask kernel firmware_class module to get the boot firmware off disk.
2152          * request_firmware() is synchronous, file is in memory on return. */
2153         for (index = api_max; index >= api_min; index--) {
2154                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2155                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2156                 if (ret < 0) {
2157                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2158                                   buf, ret);
2159                         if (ret == -ENOENT)
2160                                 continue;
2161                         else
2162                                 goto error;
2163                 } else {
2164                         if (index < api_max)
2165                                 IWL_ERR(priv, "Loaded firmware %s, "
2166                                         "which is deprecated. "
2167                                         " Please use API v%u instead.\n",
2168                                           buf, api_max);
2169                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2170                                        "(%zd bytes) from disk\n",
2171                                        buf, ucode_raw->size);
2172                         break;
2173                 }
2174         }
2175
2176         if (ret < 0)
2177                 goto error;
2178
2179         /* Make sure that we got at least our header! */
2180         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2181                 IWL_ERR(priv, "File size way too small!\n");
2182                 ret = -EINVAL;
2183                 goto err_release;
2184         }
2185
2186         /* Data from ucode file:  header followed by uCode images */
2187         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2188
2189         priv->ucode_ver = le32_to_cpu(ucode->ver);
2190         api_ver = IWL_UCODE_API(priv->ucode_ver);
2191         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2192         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2193         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2194         init_data_size =
2195                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2196         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2197         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2198
2199         /* api_ver should match the api version forming part of the
2200          * firmware filename ... but we don't check for that and only rely
2201          * on the API version read from firmware header from here on forward */
2202
2203         if (api_ver < api_min || api_ver > api_max) {
2204                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2205                           "Driver supports v%u, firmware is v%u.\n",
2206                           api_max, api_ver);
2207                 priv->ucode_ver = 0;
2208                 ret = -EINVAL;
2209                 goto err_release;
2210         }
2211         if (api_ver != api_max)
2212                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2213                           "got %u. New firmware can be obtained "
2214                           "from http://www.intellinuxwireless.org.\n",
2215                           api_max, api_ver);
2216
2217         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2218                 IWL_UCODE_MAJOR(priv->ucode_ver),
2219                 IWL_UCODE_MINOR(priv->ucode_ver),
2220                 IWL_UCODE_API(priv->ucode_ver),
2221                 IWL_UCODE_SERIAL(priv->ucode_ver));
2222
2223         snprintf(priv->hw->wiphy->fw_version,
2224                  sizeof(priv->hw->wiphy->fw_version),
2225                  "%u.%u.%u.%u",
2226                  IWL_UCODE_MAJOR(priv->ucode_ver),
2227                  IWL_UCODE_MINOR(priv->ucode_ver),
2228                  IWL_UCODE_API(priv->ucode_ver),
2229                  IWL_UCODE_SERIAL(priv->ucode_ver));
2230
2231         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2232                        priv->ucode_ver);
2233         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2234                        inst_size);
2235         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2236                        data_size);
2237         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2238                        init_size);
2239         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2240                        init_data_size);
2241         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2242                        boot_size);
2243
2244
2245         /* Verify size of file vs. image size info in file's header */
2246         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2247                 inst_size + data_size + init_size +
2248                 init_data_size + boot_size) {
2249
2250                 IWL_DEBUG_INFO(priv,
2251                         "uCode file size %zd does not match expected size\n",
2252                         ucode_raw->size);
2253                 ret = -EINVAL;
2254                 goto err_release;
2255         }
2256
2257         /* Verify that uCode images will fit in card's SRAM */
2258         if (inst_size > IWL39_MAX_INST_SIZE) {
2259                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2260                                inst_size);
2261                 ret = -EINVAL;
2262                 goto err_release;
2263         }
2264
2265         if (data_size > IWL39_MAX_DATA_SIZE) {
2266                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2267                                data_size);
2268                 ret = -EINVAL;
2269                 goto err_release;
2270         }
2271         if (init_size > IWL39_MAX_INST_SIZE) {
2272                 IWL_DEBUG_INFO(priv,
2273                                 "uCode init instr len %d too large to fit in\n",
2274                                 init_size);
2275                 ret = -EINVAL;
2276                 goto err_release;
2277         }
2278         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2279                 IWL_DEBUG_INFO(priv,
2280                                 "uCode init data len %d too large to fit in\n",
2281                                 init_data_size);
2282                 ret = -EINVAL;
2283                 goto err_release;
2284         }
2285         if (boot_size > IWL39_MAX_BSM_SIZE) {
2286                 IWL_DEBUG_INFO(priv,
2287                                 "uCode boot instr len %d too large to fit in\n",
2288                                 boot_size);
2289                 ret = -EINVAL;
2290                 goto err_release;
2291         }
2292
2293         /* Allocate ucode buffers for card's bus-master loading ... */
2294
2295         /* Runtime instructions and 2 copies of data:
2296          * 1) unmodified from disk
2297          * 2) backup cache for save/restore during power-downs */
2298         priv->ucode_code.len = inst_size;
2299         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2300
2301         priv->ucode_data.len = data_size;
2302         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2303
2304         priv->ucode_data_backup.len = data_size;
2305         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2306
2307         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2308             !priv->ucode_data_backup.v_addr)
2309                 goto err_pci_alloc;
2310
2311         /* Initialization instructions and data */
2312         if (init_size && init_data_size) {
2313                 priv->ucode_init.len = init_size;
2314                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2315
2316                 priv->ucode_init_data.len = init_data_size;
2317                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2318
2319                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2320                         goto err_pci_alloc;
2321         }
2322
2323         /* Bootstrap (instructions only, no data) */
2324         if (boot_size) {
2325                 priv->ucode_boot.len = boot_size;
2326                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2327
2328                 if (!priv->ucode_boot.v_addr)
2329                         goto err_pci_alloc;
2330         }
2331
2332         /* Copy images into buffers for card's bus-master reads ... */
2333
2334         /* Runtime instructions (first block of data in file) */
2335         len = inst_size;
2336         IWL_DEBUG_INFO(priv,
2337                 "Copying (but not loading) uCode instr len %zd\n", len);
2338         memcpy(priv->ucode_code.v_addr, src, len);
2339         src += len;
2340
2341         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2342                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2343
2344         /* Runtime data (2nd block)
2345          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2346         len = data_size;
2347         IWL_DEBUG_INFO(priv,
2348                 "Copying (but not loading) uCode data len %zd\n", len);
2349         memcpy(priv->ucode_data.v_addr, src, len);
2350         memcpy(priv->ucode_data_backup.v_addr, src, len);
2351         src += len;
2352
2353         /* Initialization instructions (3rd block) */
2354         if (init_size) {
2355                 len = init_size;
2356                 IWL_DEBUG_INFO(priv,
2357                         "Copying (but not loading) init instr len %zd\n", len);
2358                 memcpy(priv->ucode_init.v_addr, src, len);
2359                 src += len;
2360         }
2361
2362         /* Initialization data (4th block) */
2363         if (init_data_size) {
2364                 len = init_data_size;
2365                 IWL_DEBUG_INFO(priv,
2366                         "Copying (but not loading) init data len %zd\n", len);
2367                 memcpy(priv->ucode_init_data.v_addr, src, len);
2368                 src += len;
2369         }
2370
2371         /* Bootstrap instructions (5th block) */
2372         len = boot_size;
2373         IWL_DEBUG_INFO(priv,
2374                 "Copying (but not loading) boot instr len %zd\n", len);
2375         memcpy(priv->ucode_boot.v_addr, src, len);
2376
2377         /* We have our copies now, allow OS release its copies */
2378         release_firmware(ucode_raw);
2379         return 0;
2380
2381  err_pci_alloc:
2382         IWL_ERR(priv, "failed to allocate pci memory\n");
2383         ret = -ENOMEM;
2384         iwl3945_dealloc_ucode_pci(priv);
2385
2386  err_release:
2387         release_firmware(ucode_raw);
2388
2389  error:
2390         return ret;
2391 }
2392
2393
2394 /**
2395  * iwl3945_set_ucode_ptrs - Set uCode address location
2396  *
2397  * Tell initialization uCode where to find runtime uCode.
2398  *
2399  * BSM registers initially contain pointers to initialization uCode.
2400  * We need to replace them to load runtime uCode inst and data,
2401  * and to save runtime data when powering down.
2402  */
2403 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2404 {
2405         dma_addr_t pinst;
2406         dma_addr_t pdata;
2407
2408         /* bits 31:0 for 3945 */
2409         pinst = priv->ucode_code.p_addr;
2410         pdata = priv->ucode_data_backup.p_addr;
2411
2412         /* Tell bootstrap uCode where to find image to load */
2413         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2414         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2415         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2416                                  priv->ucode_data.len);
2417
2418         /* Inst byte count must be last to set up, bit 31 signals uCode
2419          *   that all new ptr/size info is in place */
2420         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2421                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2422
2423         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2424
2425         return 0;
2426 }
2427
2428 /**
2429  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2430  *
2431  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2432  *
2433  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2434  */
2435 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2436 {
2437         /* Check alive response for "valid" sign from uCode */
2438         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2439                 /* We had an error bringing up the hardware, so take it
2440                  * all the way back down so we can try again */
2441                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2442                 goto restart;
2443         }
2444
2445         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2446          * This is a paranoid check, because we would not have gotten the
2447          * "initialize" alive if code weren't properly loaded.  */
2448         if (iwl3945_verify_ucode(priv)) {
2449                 /* Runtime instruction load was bad;
2450                  * take it all the way back down so we can try again */
2451                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2452                 goto restart;
2453         }
2454
2455         /* Send pointers to protocol/runtime uCode image ... init code will
2456          * load and launch runtime uCode, which will send us another "Alive"
2457          * notification. */
2458         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2459         if (iwl3945_set_ucode_ptrs(priv)) {
2460                 /* Runtime instruction load won't happen;
2461                  * take it all the way back down so we can try again */
2462                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2463                 goto restart;
2464         }
2465         return;
2466
2467  restart:
2468         queue_work(priv->workqueue, &priv->restart);
2469 }
2470
2471 /**
2472  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2473  *                   from protocol/runtime uCode (initialization uCode's
2474  *                   Alive gets handled by iwl3945_init_alive_start()).
2475  */
2476 static void iwl3945_alive_start(struct iwl_priv *priv)
2477 {
2478         int thermal_spin = 0;
2479         u32 rfkill;
2480
2481         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2482
2483         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2484                 /* We had an error bringing up the hardware, so take it
2485                  * all the way back down so we can try again */
2486                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2487                 goto restart;
2488         }
2489
2490         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2491          * This is a paranoid check, because we would not have gotten the
2492          * "runtime" alive if code weren't properly loaded.  */
2493         if (iwl3945_verify_ucode(priv)) {
2494                 /* Runtime instruction load was bad;
2495                  * take it all the way back down so we can try again */
2496                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2497                 goto restart;
2498         }
2499
2500         iwl_clear_stations_table(priv);
2501
2502         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2503         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2504
2505         if (rfkill & 0x1) {
2506                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2507                 /* if RFKILL is not on, then wait for thermal
2508                  * sensor in adapter to kick in */
2509                 while (iwl3945_hw_get_temperature(priv) == 0) {
2510                         thermal_spin++;
2511                         udelay(10);
2512                 }
2513
2514                 if (thermal_spin)
2515                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2516                                        thermal_spin * 10);
2517         } else
2518                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2519
2520         /* After the ALIVE response, we can send commands to 3945 uCode */
2521         set_bit(STATUS_ALIVE, &priv->status);
2522
2523         if (iwl_is_rfkill(priv))
2524                 return;
2525
2526         ieee80211_wake_queues(priv->hw);
2527
2528         priv->active_rate = priv->rates_mask;
2529         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2530
2531         iwl_power_update_mode(priv, true);
2532
2533         if (iwl_is_associated(priv)) {
2534                 struct iwl3945_rxon_cmd *active_rxon =
2535                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2536
2537                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2538                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2539         } else {
2540                 /* Initialize our rx_config data */
2541                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2542         }
2543
2544         /* Configure Bluetooth device coexistence support */
2545         iwl_send_bt_config(priv);
2546
2547         /* Configure the adapter for unassociated operation */
2548         iwlcore_commit_rxon(priv);
2549
2550         iwl3945_reg_txpower_periodic(priv);
2551
2552         iwl_leds_init(priv);
2553
2554         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2555         set_bit(STATUS_READY, &priv->status);
2556         wake_up_interruptible(&priv->wait_command_queue);
2557
2558         /* reassociate for ADHOC mode */
2559         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2560                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2561                                                                 priv->vif);
2562                 if (beacon)
2563                         iwl_mac_beacon_update(priv->hw, beacon);
2564         }
2565
2566         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2567                 iwl_set_mode(priv, priv->iw_mode);
2568
2569         return;
2570
2571  restart:
2572         queue_work(priv->workqueue, &priv->restart);
2573 }
2574
2575 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2576
2577 static void __iwl3945_down(struct iwl_priv *priv)
2578 {
2579         unsigned long flags;
2580         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2581         struct ieee80211_conf *conf = NULL;
2582
2583         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2584
2585         conf = ieee80211_get_hw_conf(priv->hw);
2586
2587         if (!exit_pending)
2588                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2589
2590         iwl_clear_stations_table(priv);
2591
2592         /* Unblock any waiting calls */
2593         wake_up_interruptible_all(&priv->wait_command_queue);
2594
2595         /* Wipe out the EXIT_PENDING status bit if we are not actually
2596          * exiting the module */
2597         if (!exit_pending)
2598                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2599
2600         /* stop and reset the on-board processor */
2601         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2602
2603         /* tell the device to stop sending interrupts */
2604         spin_lock_irqsave(&priv->lock, flags);
2605         iwl_disable_interrupts(priv);
2606         spin_unlock_irqrestore(&priv->lock, flags);
2607         iwl_synchronize_irq(priv);
2608
2609         if (priv->mac80211_registered)
2610                 ieee80211_stop_queues(priv->hw);
2611
2612         /* If we have not previously called iwl3945_init() then
2613          * clear all bits but the RF Kill bits and return */
2614         if (!iwl_is_init(priv)) {
2615                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2616                                         STATUS_RF_KILL_HW |
2617                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2618                                         STATUS_GEO_CONFIGURED |
2619                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2620                                         STATUS_EXIT_PENDING;
2621                 goto exit;
2622         }
2623
2624         /* ...otherwise clear out all the status bits but the RF Kill
2625          * bit and continue taking the NIC down. */
2626         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2627                                 STATUS_RF_KILL_HW |
2628                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2629                                 STATUS_GEO_CONFIGURED |
2630                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2631                                 STATUS_FW_ERROR |
2632                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2633                                 STATUS_EXIT_PENDING;
2634
2635         iwl3945_hw_txq_ctx_stop(priv);
2636         iwl3945_hw_rxq_stop(priv);
2637
2638         /* Power-down device's busmaster DMA clocks */
2639         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2640         udelay(5);
2641
2642         /* Stop the device, and put it in low power state */
2643         priv->cfg->ops->lib->apm_ops.stop(priv);
2644
2645  exit:
2646         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2647
2648         if (priv->ibss_beacon)
2649                 dev_kfree_skb(priv->ibss_beacon);
2650         priv->ibss_beacon = NULL;
2651
2652         /* clear out any free frames */
2653         iwl3945_clear_free_frames(priv);
2654 }
2655
2656 static void iwl3945_down(struct iwl_priv *priv)
2657 {
2658         mutex_lock(&priv->mutex);
2659         __iwl3945_down(priv);
2660         mutex_unlock(&priv->mutex);
2661
2662         iwl3945_cancel_deferred_work(priv);
2663 }
2664
2665 #define MAX_HW_RESTARTS 5
2666
2667 static int __iwl3945_up(struct iwl_priv *priv)
2668 {
2669         int rc, i;
2670
2671         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2672                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2673                 return -EIO;
2674         }
2675
2676         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2677                 IWL_ERR(priv, "ucode not available for device bring up\n");
2678                 return -EIO;
2679         }
2680
2681         /* If platform's RF_KILL switch is NOT set to KILL */
2682         if (iwl_read32(priv, CSR_GP_CNTRL) &
2683                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2684                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2685         else {
2686                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2687                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2688                 return -ENODEV;
2689         }
2690
2691         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2692
2693         rc = iwl3945_hw_nic_init(priv);
2694         if (rc) {
2695                 IWL_ERR(priv, "Unable to int nic\n");
2696                 return rc;
2697         }
2698
2699         /* make sure rfkill handshake bits are cleared */
2700         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2701         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2702                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2703
2704         /* clear (again), then enable host interrupts */
2705         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2706         iwl_enable_interrupts(priv);
2707
2708         /* really make sure rfkill handshake bits are cleared */
2709         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2710         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2711
2712         /* Copy original ucode data image from disk into backup cache.
2713          * This will be used to initialize the on-board processor's
2714          * data SRAM for a clean start when the runtime program first loads. */
2715         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2716                priv->ucode_data.len);
2717
2718         /* We return success when we resume from suspend and rf_kill is on. */
2719         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2720                 return 0;
2721
2722         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2723
2724                 iwl_clear_stations_table(priv);
2725
2726                 /* load bootstrap state machine,
2727                  * load bootstrap program into processor's memory,
2728                  * prepare to load the "initialize" uCode */
2729                 priv->cfg->ops->lib->load_ucode(priv);
2730
2731                 if (rc) {
2732                         IWL_ERR(priv,
2733                                 "Unable to set up bootstrap uCode: %d\n", rc);
2734                         continue;
2735                 }
2736
2737                 /* start card; "initialize" will load runtime ucode */
2738                 iwl3945_nic_start(priv);
2739
2740                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2741
2742                 return 0;
2743         }
2744
2745         set_bit(STATUS_EXIT_PENDING, &priv->status);
2746         __iwl3945_down(priv);
2747         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2748
2749         /* tried to restart and config the device for as long as our
2750          * patience could withstand */
2751         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2752         return -EIO;
2753 }
2754
2755
2756 /*****************************************************************************
2757  *
2758  * Workqueue callbacks
2759  *
2760  *****************************************************************************/
2761
2762 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2763 {
2764         struct iwl_priv *priv =
2765             container_of(data, struct iwl_priv, init_alive_start.work);
2766
2767         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2768                 return;
2769
2770         mutex_lock(&priv->mutex);
2771         iwl3945_init_alive_start(priv);
2772         mutex_unlock(&priv->mutex);
2773 }
2774
2775 static void iwl3945_bg_alive_start(struct work_struct *data)
2776 {
2777         struct iwl_priv *priv =
2778             container_of(data, struct iwl_priv, alive_start.work);
2779
2780         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2781                 return;
2782
2783         mutex_lock(&priv->mutex);
2784         iwl3945_alive_start(priv);
2785         mutex_unlock(&priv->mutex);
2786 }
2787
2788 /*
2789  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2790  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2791  * *is* readable even when device has been SW_RESET into low power mode
2792  * (e.g. during RF KILL).
2793  */
2794 static void iwl3945_rfkill_poll(struct work_struct *data)
2795 {
2796         struct iwl_priv *priv =
2797             container_of(data, struct iwl_priv, rfkill_poll.work);
2798         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2799         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2800                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2801
2802         if (new_rfkill != old_rfkill) {
2803                 if (new_rfkill)
2804                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2805                 else
2806                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2807
2808                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2809
2810                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2811                                 new_rfkill ? "disable radio" : "enable radio");
2812         }
2813
2814         /* Keep this running, even if radio now enabled.  This will be
2815          * cancelled in mac_start() if system decides to start again */
2816         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2817                            round_jiffies_relative(2 * HZ));
2818
2819 }
2820
2821 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2822 static void iwl3945_bg_request_scan(struct work_struct *data)
2823 {
2824         struct iwl_priv *priv =
2825             container_of(data, struct iwl_priv, request_scan);
2826         struct iwl_host_cmd cmd = {
2827                 .id = REPLY_SCAN_CMD,
2828                 .len = sizeof(struct iwl3945_scan_cmd),
2829                 .flags = CMD_SIZE_HUGE,
2830         };
2831         int rc = 0;
2832         struct iwl3945_scan_cmd *scan;
2833         struct ieee80211_conf *conf = NULL;
2834         u8 n_probes = 0;
2835         enum ieee80211_band band;
2836         bool is_active = false;
2837
2838         conf = ieee80211_get_hw_conf(priv->hw);
2839
2840         mutex_lock(&priv->mutex);
2841
2842         cancel_delayed_work(&priv->scan_check);
2843
2844         if (!iwl_is_ready(priv)) {
2845                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2846                 goto done;
2847         }
2848
2849         /* Make sure the scan wasn't canceled before this queued work
2850          * was given the chance to run... */
2851         if (!test_bit(STATUS_SCANNING, &priv->status))
2852                 goto done;
2853
2854         /* This should never be called or scheduled if there is currently
2855          * a scan active in the hardware. */
2856         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2857                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2858                                 "Ignoring second request.\n");
2859                 rc = -EIO;
2860                 goto done;
2861         }
2862
2863         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2864                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2865                 goto done;
2866         }
2867
2868         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2869                 IWL_DEBUG_HC(priv,
2870                         "Scan request while abort pending. Queuing.\n");
2871                 goto done;
2872         }
2873
2874         if (iwl_is_rfkill(priv)) {
2875                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2876                 goto done;
2877         }
2878
2879         if (!test_bit(STATUS_READY, &priv->status)) {
2880                 IWL_DEBUG_HC(priv,
2881                         "Scan request while uninitialized. Queuing.\n");
2882                 goto done;
2883         }
2884
2885         if (!priv->scan_bands) {
2886                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2887                 goto done;
2888         }
2889
2890         if (!priv->scan) {
2891                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2892                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2893                 if (!priv->scan) {
2894                         rc = -ENOMEM;
2895                         goto done;
2896                 }
2897         }
2898         scan = priv->scan;
2899         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2900
2901         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2902         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2903
2904         if (iwl_is_associated(priv)) {
2905                 u16 interval = 0;
2906                 u32 extra;
2907                 u32 suspend_time = 100;
2908                 u32 scan_suspend_time = 100;
2909                 unsigned long flags;
2910
2911                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2912
2913                 spin_lock_irqsave(&priv->lock, flags);
2914                 interval = priv->beacon_int;
2915                 spin_unlock_irqrestore(&priv->lock, flags);
2916
2917                 scan->suspend_time = 0;
2918                 scan->max_out_time = cpu_to_le32(200 * 1024);
2919                 if (!interval)
2920                         interval = suspend_time;
2921                 /*
2922                  * suspend time format:
2923                  *  0-19: beacon interval in usec (time before exec.)
2924                  * 20-23: 0
2925                  * 24-31: number of beacons (suspend between channels)
2926                  */
2927
2928                 extra = (suspend_time / interval) << 24;
2929                 scan_suspend_time = 0xFF0FFFFF &
2930                     (extra | ((suspend_time % interval) * 1024));
2931
2932                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2933                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2934                                scan_suspend_time, interval);
2935         }
2936
2937         if (priv->scan_request->n_ssids) {
2938                 int i, p = 0;
2939                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2940                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2941                         /* always does wildcard anyway */
2942                         if (!priv->scan_request->ssids[i].ssid_len)
2943                                 continue;
2944                         scan->direct_scan[p].id = WLAN_EID_SSID;
2945                         scan->direct_scan[p].len =
2946                                 priv->scan_request->ssids[i].ssid_len;
2947                         memcpy(scan->direct_scan[p].ssid,
2948                                priv->scan_request->ssids[i].ssid,
2949                                priv->scan_request->ssids[i].ssid_len);
2950                         n_probes++;
2951                         p++;
2952                 }
2953                 is_active = true;
2954         } else
2955                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2956
2957         /* We don't build a direct scan probe request; the uCode will do
2958          * that based on the direct_mask added to each channel entry */
2959         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2960         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2961         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2962
2963         /* flags + rate selection */
2964
2965         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2966                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2967                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2968                 scan->good_CRC_th = 0;
2969                 band = IEEE80211_BAND_2GHZ;
2970         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2971                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2972                 /*
2973                  * If active scaning is requested but a certain channel
2974                  * is marked passive, we can do active scanning if we
2975                  * detect transmissions.
2976                  */
2977                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2978                 band = IEEE80211_BAND_5GHZ;
2979         } else {
2980                 IWL_WARN(priv, "Invalid scan band count\n");
2981                 goto done;
2982         }
2983
2984         scan->tx_cmd.len = cpu_to_le16(
2985                         iwl_fill_probe_req(priv,
2986                                 (struct ieee80211_mgmt *)scan->data,
2987                                 priv->scan_request->ie,
2988                                 priv->scan_request->ie_len,
2989                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2990
2991         /* select Rx antennas */
2992         scan->flags |= iwl3945_get_antenna_flags(priv);
2993
2994         if (iwl_is_monitor_mode(priv))
2995                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2996
2997         scan->channel_count =
2998                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2999                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3000
3001         if (scan->channel_count == 0) {
3002                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3003                 goto done;
3004         }
3005
3006         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3007             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3008         cmd.data = scan;
3009         scan->len = cpu_to_le16(cmd.len);
3010
3011         set_bit(STATUS_SCAN_HW, &priv->status);
3012         rc = iwl_send_cmd_sync(priv, &cmd);
3013         if (rc)
3014                 goto done;
3015
3016         queue_delayed_work(priv->workqueue, &priv->scan_check,
3017                            IWL_SCAN_CHECK_WATCHDOG);
3018
3019         mutex_unlock(&priv->mutex);
3020         return;
3021
3022  done:
3023         /* can not perform scan make sure we clear scanning
3024          * bits from status so next scan request can be performed.
3025          * if we dont clear scanning status bit here all next scan
3026          * will fail
3027         */
3028         clear_bit(STATUS_SCAN_HW, &priv->status);
3029         clear_bit(STATUS_SCANNING, &priv->status);
3030
3031         /* inform mac80211 scan aborted */
3032         queue_work(priv->workqueue, &priv->scan_completed);
3033         mutex_unlock(&priv->mutex);
3034 }
3035
3036 static void iwl3945_bg_restart(struct work_struct *data)
3037 {
3038         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3039
3040         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3041                 return;
3042
3043         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3044                 mutex_lock(&priv->mutex);
3045                 priv->vif = NULL;
3046                 priv->is_open = 0;
3047                 mutex_unlock(&priv->mutex);
3048                 iwl3945_down(priv);
3049                 ieee80211_restart_hw(priv->hw);
3050         } else {
3051                 iwl3945_down(priv);
3052
3053                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3054                         return;
3055
3056                 mutex_lock(&priv->mutex);
3057                 __iwl3945_up(priv);
3058                 mutex_unlock(&priv->mutex);
3059         }
3060 }
3061
3062 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3063 {
3064         struct iwl_priv *priv =
3065             container_of(data, struct iwl_priv, rx_replenish);
3066
3067         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3068                 return;
3069
3070         mutex_lock(&priv->mutex);
3071         iwl3945_rx_replenish(priv);
3072         mutex_unlock(&priv->mutex);
3073 }
3074
3075 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3076
3077 void iwl3945_post_associate(struct iwl_priv *priv)
3078 {
3079         int rc = 0;
3080         struct ieee80211_conf *conf = NULL;
3081
3082         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3083                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3084                 return;
3085         }
3086
3087
3088         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3089                         priv->assoc_id, priv->active_rxon.bssid_addr);
3090
3091         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3092                 return;
3093
3094         if (!priv->vif || !priv->is_open)
3095                 return;
3096
3097         iwl_scan_cancel_timeout(priv, 200);
3098
3099         conf = ieee80211_get_hw_conf(priv->hw);
3100
3101         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3102         iwlcore_commit_rxon(priv);
3103
3104         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3105         iwl_setup_rxon_timing(priv);
3106         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3107                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3108         if (rc)
3109                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3110                             "Attempting to continue.\n");
3111
3112         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3113
3114         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3115
3116         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3117                         priv->assoc_id, priv->beacon_int);
3118
3119         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3120                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3121         else
3122                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3123
3124         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3125                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3126                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3127                 else
3128                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3129
3130                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3131                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3132
3133         }
3134
3135         iwlcore_commit_rxon(priv);
3136
3137         switch (priv->iw_mode) {
3138         case NL80211_IFTYPE_STATION:
3139                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3140                 break;
3141
3142         case NL80211_IFTYPE_ADHOC:
3143
3144                 priv->assoc_id = 1;
3145                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3146                 iwl3945_sync_sta(priv, IWL_STA_ID,
3147                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3148                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3149                                  CMD_ASYNC);
3150                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3151                 iwl3945_send_beacon_cmd(priv);
3152
3153                 break;
3154
3155         default:
3156                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3157                            __func__, priv->iw_mode);
3158                 break;
3159         }
3160
3161         iwl_activate_qos(priv, 0);
3162
3163         /* we have just associated, don't start scan too early */
3164         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3165 }
3166
3167 /*****************************************************************************
3168  *
3169  * mac80211 entry point functions
3170  *
3171  *****************************************************************************/
3172
3173 #define UCODE_READY_TIMEOUT     (2 * HZ)
3174
3175 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3176 {
3177         struct iwl_priv *priv = hw->priv;
3178         int ret;
3179
3180         IWL_DEBUG_MAC80211(priv, "enter\n");
3181
3182         /* we should be verifying the device is ready to be opened */
3183         mutex_lock(&priv->mutex);
3184
3185         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3186          * ucode filename and max sizes are card-specific. */
3187
3188         if (!priv->ucode_code.len) {
3189                 ret = iwl3945_read_ucode(priv);
3190                 if (ret) {
3191                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3192                         mutex_unlock(&priv->mutex);
3193                         goto out_release_irq;
3194                 }
3195         }
3196
3197         ret = __iwl3945_up(priv);
3198
3199         mutex_unlock(&priv->mutex);
3200
3201         if (ret)
3202                 goto out_release_irq;
3203
3204         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3205
3206         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3207          * mac80211 will not be run successfully. */
3208         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3209                         test_bit(STATUS_READY, &priv->status),
3210                         UCODE_READY_TIMEOUT);
3211         if (!ret) {
3212                 if (!test_bit(STATUS_READY, &priv->status)) {
3213                         IWL_ERR(priv,
3214                                 "Wait for START_ALIVE timeout after %dms.\n",
3215                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3216                         ret = -ETIMEDOUT;
3217                         goto out_release_irq;
3218                 }
3219         }
3220
3221         /* ucode is running and will send rfkill notifications,
3222          * no need to poll the killswitch state anymore */
3223         cancel_delayed_work(&priv->rfkill_poll);
3224
3225         iwl_led_start(priv);
3226
3227         priv->is_open = 1;
3228         IWL_DEBUG_MAC80211(priv, "leave\n");
3229         return 0;
3230
3231 out_release_irq:
3232         priv->is_open = 0;
3233         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3234         return ret;
3235 }
3236
3237 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3238 {
3239         struct iwl_priv *priv = hw->priv;
3240
3241         IWL_DEBUG_MAC80211(priv, "enter\n");
3242
3243         if (!priv->is_open) {
3244                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3245                 return;
3246         }
3247
3248         priv->is_open = 0;
3249
3250         if (iwl_is_ready_rf(priv)) {
3251                 /* stop mac, cancel any scan request and clear
3252                  * RXON_FILTER_ASSOC_MSK BIT
3253                  */
3254                 mutex_lock(&priv->mutex);
3255                 iwl_scan_cancel_timeout(priv, 100);
3256                 mutex_unlock(&priv->mutex);
3257         }
3258
3259         iwl3945_down(priv);
3260
3261         flush_workqueue(priv->workqueue);
3262
3263         /* start polling the killswitch state again */
3264         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3265                            round_jiffies_relative(2 * HZ));
3266
3267         IWL_DEBUG_MAC80211(priv, "leave\n");
3268 }
3269
3270 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3271 {
3272         struct iwl_priv *priv = hw->priv;
3273
3274         IWL_DEBUG_MAC80211(priv, "enter\n");
3275
3276         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3277                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3278
3279         if (iwl3945_tx_skb(priv, skb))
3280                 dev_kfree_skb_any(skb);
3281
3282         IWL_DEBUG_MAC80211(priv, "leave\n");
3283         return NETDEV_TX_OK;
3284 }
3285
3286 void iwl3945_config_ap(struct iwl_priv *priv)
3287 {
3288         int rc = 0;
3289
3290         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3291                 return;
3292
3293         /* The following should be done only at AP bring up */
3294         if (!(iwl_is_associated(priv))) {
3295
3296                 /* RXON - unassoc (to set timing command) */
3297                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3298                 iwlcore_commit_rxon(priv);
3299
3300                 /* RXON Timing */
3301                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3302                 iwl_setup_rxon_timing(priv);
3303                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3304                                       sizeof(priv->rxon_timing),
3305                                       &priv->rxon_timing);
3306                 if (rc)
3307                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3308                                         "Attempting to continue.\n");
3309
3310                 /* FIXME: what should be the assoc_id for AP? */
3311                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3312                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3313                         priv->staging_rxon.flags |=
3314                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3315                 else
3316                         priv->staging_rxon.flags &=
3317                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3318
3319                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3320                         if (priv->assoc_capability &
3321                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3322                                 priv->staging_rxon.flags |=
3323                                         RXON_FLG_SHORT_SLOT_MSK;
3324                         else
3325                                 priv->staging_rxon.flags &=
3326                                         ~RXON_FLG_SHORT_SLOT_MSK;
3327
3328                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3329                                 priv->staging_rxon.flags &=
3330                                         ~RXON_FLG_SHORT_SLOT_MSK;
3331                 }
3332                 /* restore RXON assoc */
3333                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3334                 iwlcore_commit_rxon(priv);
3335                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3336         }
3337         iwl3945_send_beacon_cmd(priv);
3338
3339         /* FIXME - we need to add code here to detect a totally new
3340          * configuration, reset the AP, unassoc, rxon timing, assoc,
3341          * clear sta table, add BCAST sta... */
3342 }
3343
3344 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3345                                struct ieee80211_vif *vif,
3346                                struct ieee80211_sta *sta,
3347                                struct ieee80211_key_conf *key)
3348 {
3349         struct iwl_priv *priv = hw->priv;
3350         const u8 *addr;
3351         int ret = 0;
3352         u8 sta_id = IWL_INVALID_STATION;
3353         u8 static_key;
3354
3355         IWL_DEBUG_MAC80211(priv, "enter\n");
3356
3357         if (iwl3945_mod_params.sw_crypto) {
3358                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3359                 return -EOPNOTSUPP;
3360         }
3361
3362         addr = sta ? sta->addr : iwl_bcast_addr;
3363         static_key = !iwl_is_associated(priv);
3364
3365         if (!static_key) {
3366                 sta_id = iwl_find_station(priv, addr);
3367                 if (sta_id == IWL_INVALID_STATION) {
3368                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3369                                             addr);
3370                         return -EINVAL;
3371                 }
3372         }
3373
3374         mutex_lock(&priv->mutex);
3375         iwl_scan_cancel_timeout(priv, 100);
3376         mutex_unlock(&priv->mutex);
3377
3378         switch (cmd) {
3379         case SET_KEY:
3380                 if (static_key)
3381                         ret = iwl3945_set_static_key(priv, key);
3382                 else
3383                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3384                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3385                 break;
3386         case DISABLE_KEY:
3387                 if (static_key)
3388                         ret = iwl3945_remove_static_key(priv);
3389                 else
3390                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3391                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3392                 break;
3393         default:
3394                 ret = -EINVAL;
3395         }
3396
3397         IWL_DEBUG_MAC80211(priv, "leave\n");
3398
3399         return ret;
3400 }
3401
3402 /*****************************************************************************
3403  *
3404  * sysfs attributes
3405  *
3406  *****************************************************************************/
3407
3408 #ifdef CONFIG_IWLWIFI_DEBUG
3409
3410 /*
3411  * The following adds a new attribute to the sysfs representation
3412  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3413  * used for controlling the debug level.
3414  *
3415  * See the level definitions in iwl for details.
3416  *
3417  * The debug_level being managed using sysfs below is a per device debug
3418  * level that is used instead of the global debug level if it (the per
3419  * device debug level) is set.
3420  */
3421 static ssize_t show_debug_level(struct device *d,
3422                                 struct device_attribute *attr, char *buf)
3423 {
3424         struct iwl_priv *priv = dev_get_drvdata(d);
3425         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3426 }
3427 static ssize_t store_debug_level(struct device *d,
3428                                 struct device_attribute *attr,
3429                                  const char *buf, size_t count)
3430 {
3431         struct iwl_priv *priv = dev_get_drvdata(d);
3432         unsigned long val;
3433         int ret;
3434
3435         ret = strict_strtoul(buf, 0, &val);
3436         if (ret)
3437                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3438         else {
3439                 priv->debug_level = val;
3440                 if (iwl_alloc_traffic_mem(priv))
3441                         IWL_ERR(priv,
3442                                 "Not enough memory to generate traffic log\n");
3443         }
3444         return strnlen(buf, count);
3445 }
3446
3447 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3448                         show_debug_level, store_debug_level);
3449
3450 #endif /* CONFIG_IWLWIFI_DEBUG */
3451
3452 static ssize_t show_temperature(struct device *d,
3453                                 struct device_attribute *attr, char *buf)
3454 {
3455         struct iwl_priv *priv = dev_get_drvdata(d);
3456
3457         if (!iwl_is_alive(priv))
3458                 return -EAGAIN;
3459
3460         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3461 }
3462
3463 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3464
3465 static ssize_t show_tx_power(struct device *d,
3466                              struct device_attribute *attr, char *buf)
3467 {
3468         struct iwl_priv *priv = dev_get_drvdata(d);
3469         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3470 }
3471
3472 static ssize_t store_tx_power(struct device *d,
3473                               struct device_attribute *attr,
3474                               const char *buf, size_t count)
3475 {
3476         struct iwl_priv *priv = dev_get_drvdata(d);
3477         char *p = (char *)buf;
3478         u32 val;
3479
3480         val = simple_strtoul(p, &p, 10);
3481         if (p == buf)
3482                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3483         else
3484                 iwl3945_hw_reg_set_txpower(priv, val);
3485
3486         return count;
3487 }
3488
3489 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3490
3491 static ssize_t show_flags(struct device *d,
3492                           struct device_attribute *attr, char *buf)
3493 {
3494         struct iwl_priv *priv = dev_get_drvdata(d);
3495
3496         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3497 }
3498
3499 static ssize_t store_flags(struct device *d,
3500                            struct device_attribute *attr,
3501                            const char *buf, size_t count)
3502 {
3503         struct iwl_priv *priv = dev_get_drvdata(d);
3504         u32 flags = simple_strtoul(buf, NULL, 0);
3505
3506         mutex_lock(&priv->mutex);
3507         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3508                 /* Cancel any currently running scans... */
3509                 if (iwl_scan_cancel_timeout(priv, 100))
3510                         IWL_WARN(priv, "Could not cancel scan.\n");
3511                 else {
3512                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3513                                        flags);
3514                         priv->staging_rxon.flags = cpu_to_le32(flags);
3515                         iwlcore_commit_rxon(priv);
3516                 }
3517         }
3518         mutex_unlock(&priv->mutex);
3519
3520         return count;
3521 }
3522
3523 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3524
3525 static ssize_t show_filter_flags(struct device *d,
3526                                  struct device_attribute *attr, char *buf)
3527 {
3528         struct iwl_priv *priv = dev_get_drvdata(d);
3529
3530         return sprintf(buf, "0x%04X\n",
3531                 le32_to_cpu(priv->active_rxon.filter_flags));
3532 }
3533
3534 static ssize_t store_filter_flags(struct device *d,
3535                                   struct device_attribute *attr,
3536                                   const char *buf, size_t count)
3537 {
3538         struct iwl_priv *priv = dev_get_drvdata(d);
3539         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3540
3541         mutex_lock(&priv->mutex);
3542         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3543                 /* Cancel any currently running scans... */
3544                 if (iwl_scan_cancel_timeout(priv, 100))
3545                         IWL_WARN(priv, "Could not cancel scan.\n");
3546                 else {
3547                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3548                                        "0x%04X\n", filter_flags);
3549                         priv->staging_rxon.filter_flags =
3550                                 cpu_to_le32(filter_flags);
3551                         iwlcore_commit_rxon(priv);
3552                 }
3553         }
3554         mutex_unlock(&priv->mutex);
3555
3556         return count;
3557 }
3558
3559 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3560                    store_filter_flags);
3561
3562 static ssize_t show_measurement(struct device *d,
3563                                 struct device_attribute *attr, char *buf)
3564 {
3565         struct iwl_priv *priv = dev_get_drvdata(d);
3566         struct iwl_spectrum_notification measure_report;
3567         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3568         u8 *data = (u8 *)&measure_report;
3569         unsigned long flags;
3570
3571         spin_lock_irqsave(&priv->lock, flags);
3572         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3573                 spin_unlock_irqrestore(&priv->lock, flags);
3574                 return 0;
3575         }
3576         memcpy(&measure_report, &priv->measure_report, size);
3577         priv->measurement_status = 0;
3578         spin_unlock_irqrestore(&priv->lock, flags);
3579
3580         while (size && (PAGE_SIZE - len)) {
3581                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3582                                    PAGE_SIZE - len, 1);
3583                 len = strlen(buf);
3584                 if (PAGE_SIZE - len)
3585                         buf[len++] = '\n';
3586
3587                 ofs += 16;
3588                 size -= min(size, 16U);
3589         }
3590
3591         return len;
3592 }
3593
3594 static ssize_t store_measurement(struct device *d,
3595                                  struct device_attribute *attr,
3596                                  const char *buf, size_t count)
3597 {
3598         struct iwl_priv *priv = dev_get_drvdata(d);
3599         struct ieee80211_measurement_params params = {
3600                 .channel = le16_to_cpu(priv->active_rxon.channel),
3601                 .start_time = cpu_to_le64(priv->last_tsf),
3602                 .duration = cpu_to_le16(1),
3603         };
3604         u8 type = IWL_MEASURE_BASIC;
3605         u8 buffer[32];
3606         u8 channel;
3607
3608         if (count) {
3609                 char *p = buffer;
3610                 strncpy(buffer, buf, min(sizeof(buffer), count));
3611                 channel = simple_strtoul(p, NULL, 0);
3612                 if (channel)
3613                         params.channel = channel;
3614
3615                 p = buffer;
3616                 while (*p && *p != ' ')
3617                         p++;
3618                 if (*p)
3619                         type = simple_strtoul(p + 1, NULL, 0);
3620         }
3621
3622         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3623                        "channel %d (for '%s')\n", type, params.channel, buf);
3624         iwl3945_get_measurement(priv, &params, type);
3625
3626         return count;
3627 }
3628
3629 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3630                    show_measurement, store_measurement);
3631
3632 static ssize_t store_retry_rate(struct device *d,
3633                                 struct device_attribute *attr,
3634                                 const char *buf, size_t count)
3635 {
3636         struct iwl_priv *priv = dev_get_drvdata(d);
3637
3638         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3639         if (priv->retry_rate <= 0)
3640                 priv->retry_rate = 1;
3641
3642         return count;
3643 }
3644
3645 static ssize_t show_retry_rate(struct device *d,
3646                                struct device_attribute *attr, char *buf)
3647 {
3648         struct iwl_priv *priv = dev_get_drvdata(d);
3649         return sprintf(buf, "%d", priv->retry_rate);
3650 }
3651
3652 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3653                    store_retry_rate);
3654
3655
3656 static ssize_t show_channels(struct device *d,
3657                              struct device_attribute *attr, char *buf)
3658 {
3659         /* all this shit doesn't belong into sysfs anyway */
3660         return 0;
3661 }
3662
3663 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3664
3665 static ssize_t show_statistics(struct device *d,
3666                                struct device_attribute *attr, char *buf)
3667 {
3668         struct iwl_priv *priv = dev_get_drvdata(d);
3669         u32 size = sizeof(struct iwl3945_notif_statistics);
3670         u32 len = 0, ofs = 0;
3671         u8 *data = (u8 *)&priv->statistics_39;
3672         int rc = 0;
3673
3674         if (!iwl_is_alive(priv))
3675                 return -EAGAIN;
3676
3677         mutex_lock(&priv->mutex);
3678         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3679         mutex_unlock(&priv->mutex);
3680
3681         if (rc) {
3682                 len = sprintf(buf,
3683                               "Error sending statistics request: 0x%08X\n", rc);
3684                 return len;
3685         }
3686
3687         while (size && (PAGE_SIZE - len)) {
3688                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3689                                    PAGE_SIZE - len, 1);
3690                 len = strlen(buf);
3691                 if (PAGE_SIZE - len)
3692                         buf[len++] = '\n';
3693
3694                 ofs += 16;
3695                 size -= min(size, 16U);
3696         }
3697
3698         return len;
3699 }
3700
3701 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3702
3703 static ssize_t show_antenna(struct device *d,
3704                             struct device_attribute *attr, char *buf)
3705 {
3706         struct iwl_priv *priv = dev_get_drvdata(d);
3707
3708         if (!iwl_is_alive(priv))
3709                 return -EAGAIN;
3710
3711         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3712 }
3713
3714 static ssize_t store_antenna(struct device *d,
3715                              struct device_attribute *attr,
3716                              const char *buf, size_t count)
3717 {
3718         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3719         int ant;
3720
3721         if (count == 0)
3722                 return 0;
3723
3724         if (sscanf(buf, "%1i", &ant) != 1) {
3725                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3726                 return count;
3727         }
3728
3729         if ((ant >= 0) && (ant <= 2)) {
3730                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3731                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3732         } else
3733                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3734
3735
3736         return count;
3737 }
3738
3739 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3740
3741 static ssize_t show_status(struct device *d,
3742                            struct device_attribute *attr, char *buf)
3743 {
3744         struct iwl_priv *priv = dev_get_drvdata(d);
3745         if (!iwl_is_alive(priv))
3746                 return -EAGAIN;
3747         return sprintf(buf, "0x%08x\n", (int)priv->status);
3748 }
3749
3750 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3751
3752 static ssize_t dump_error_log(struct device *d,
3753                               struct device_attribute *attr,
3754                               const char *buf, size_t count)
3755 {
3756         struct iwl_priv *priv = dev_get_drvdata(d);
3757         char *p = (char *)buf;
3758
3759         if (p[0] == '1')
3760                 iwl3945_dump_nic_error_log(priv);
3761
3762         return strnlen(buf, count);
3763 }
3764
3765 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3766
3767 /*****************************************************************************
3768  *
3769  * driver setup and tear down
3770  *
3771  *****************************************************************************/
3772
3773 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3774 {
3775         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3776
3777         init_waitqueue_head(&priv->wait_command_queue);
3778
3779         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3780         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3781         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3782         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3783         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3784         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3785         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3786         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3787         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3788         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3789
3790         iwl3945_hw_setup_deferred_work(priv);
3791
3792         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3793                      iwl3945_irq_tasklet, (unsigned long)priv);
3794 }
3795
3796 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3797 {
3798         iwl3945_hw_cancel_deferred_work(priv);
3799
3800         cancel_delayed_work_sync(&priv->init_alive_start);
3801         cancel_delayed_work(&priv->scan_check);
3802         cancel_delayed_work(&priv->alive_start);
3803         cancel_work_sync(&priv->beacon_update);
3804 }
3805
3806 static struct attribute *iwl3945_sysfs_entries[] = {
3807         &dev_attr_antenna.attr,
3808         &dev_attr_channels.attr,
3809         &dev_attr_dump_errors.attr,
3810         &dev_attr_flags.attr,
3811         &dev_attr_filter_flags.attr,
3812         &dev_attr_measurement.attr,
3813         &dev_attr_retry_rate.attr,
3814         &dev_attr_statistics.attr,
3815         &dev_attr_status.attr,
3816         &dev_attr_temperature.attr,
3817         &dev_attr_tx_power.attr,
3818 #ifdef CONFIG_IWLWIFI_DEBUG
3819         &dev_attr_debug_level.attr,
3820 #endif
3821         NULL
3822 };
3823
3824 static struct attribute_group iwl3945_attribute_group = {
3825         .name = NULL,           /* put in device directory */
3826         .attrs = iwl3945_sysfs_entries,
3827 };
3828
3829 static struct ieee80211_ops iwl3945_hw_ops = {
3830         .tx = iwl3945_mac_tx,
3831         .start = iwl3945_mac_start,
3832         .stop = iwl3945_mac_stop,
3833         .add_interface = iwl_mac_add_interface,
3834         .remove_interface = iwl_mac_remove_interface,
3835         .config = iwl_mac_config,
3836         .configure_filter = iwl_configure_filter,
3837         .set_key = iwl3945_mac_set_key,
3838         .conf_tx = iwl_mac_conf_tx,
3839         .reset_tsf = iwl_mac_reset_tsf,
3840         .bss_info_changed = iwl_bss_info_changed,
3841         .hw_scan = iwl_mac_hw_scan
3842 };
3843
3844 static int iwl3945_init_drv(struct iwl_priv *priv)
3845 {
3846         int ret;
3847         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3848
3849         priv->retry_rate = 1;
3850         priv->ibss_beacon = NULL;
3851
3852         spin_lock_init(&priv->sta_lock);
3853         spin_lock_init(&priv->hcmd_lock);
3854
3855         INIT_LIST_HEAD(&priv->free_frames);
3856
3857         mutex_init(&priv->mutex);
3858
3859         /* Clear the driver's (not device's) station table */
3860         iwl_clear_stations_table(priv);
3861
3862         priv->ieee_channels = NULL;
3863         priv->ieee_rates = NULL;
3864         priv->band = IEEE80211_BAND_2GHZ;
3865
3866         priv->iw_mode = NL80211_IFTYPE_STATION;
3867         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3868
3869         iwl_reset_qos(priv);
3870
3871         priv->qos_data.qos_active = 0;
3872         priv->qos_data.qos_cap.val = 0;
3873
3874         priv->rates_mask = IWL_RATES_MASK;
3875         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3876
3877         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3878                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3879                          eeprom->version);
3880                 ret = -EINVAL;
3881                 goto err;
3882         }
3883         ret = iwl_init_channel_map(priv);
3884         if (ret) {
3885                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3886                 goto err;
3887         }
3888
3889         /* Set up txpower settings in driver for all channels */
3890         if (iwl3945_txpower_set_from_eeprom(priv)) {
3891                 ret = -EIO;
3892                 goto err_free_channel_map;
3893         }
3894
3895         ret = iwlcore_init_geos(priv);
3896         if (ret) {
3897                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3898                 goto err_free_channel_map;
3899         }
3900         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3901
3902         return 0;
3903
3904 err_free_channel_map:
3905         iwl_free_channel_map(priv);
3906 err:
3907         return ret;
3908 }
3909
3910 static int iwl3945_setup_mac(struct iwl_priv *priv)
3911 {
3912         int ret;
3913         struct ieee80211_hw *hw = priv->hw;
3914
3915         hw->rate_control_algorithm = "iwl-3945-rs";
3916         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3917
3918         /* Tell mac80211 our characteristics */
3919         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3920                     IEEE80211_HW_NOISE_DBM |
3921                     IEEE80211_HW_SPECTRUM_MGMT;
3922
3923         if (!priv->cfg->broken_powersave)
3924                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3925                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3926
3927         hw->wiphy->interface_modes =
3928                 BIT(NL80211_IFTYPE_STATION) |
3929                 BIT(NL80211_IFTYPE_ADHOC);
3930
3931         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3932                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3933
3934         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3935         /* we create the 802.11 header and a zero-length SSID element */
3936         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3937
3938         /* Default value; 4 EDCA QOS priorities */
3939         hw->queues = 4;
3940
3941         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3942                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3943                         &priv->bands[IEEE80211_BAND_2GHZ];
3944
3945         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3946                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3947                         &priv->bands[IEEE80211_BAND_5GHZ];
3948
3949         ret = ieee80211_register_hw(priv->hw);
3950         if (ret) {
3951                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3952                 return ret;
3953         }
3954         priv->mac80211_registered = 1;
3955
3956         return 0;
3957 }
3958
3959 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3960 {
3961         int err = 0;
3962         struct iwl_priv *priv;
3963         struct ieee80211_hw *hw;
3964         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3965         struct iwl3945_eeprom *eeprom;
3966         unsigned long flags;
3967
3968         /***********************
3969          * 1. Allocating HW data
3970          * ********************/
3971
3972         /* mac80211 allocates memory for this device instance, including
3973          *   space for this driver's private structure */
3974         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3975         if (hw == NULL) {
3976                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3977                 err = -ENOMEM;
3978                 goto out;
3979         }
3980         priv = hw->priv;
3981         SET_IEEE80211_DEV(hw, &pdev->dev);
3982
3983         /*
3984          * Disabling hardware scan means that mac80211 will perform scans
3985          * "the hard way", rather than using device's scan.
3986          */
3987         if (iwl3945_mod_params.disable_hw_scan) {
3988                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3989                 iwl3945_hw_ops.hw_scan = NULL;
3990         }
3991
3992
3993         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3994         priv->cfg = cfg;
3995         priv->pci_dev = pdev;
3996         priv->inta_mask = CSR_INI_SET_MASK;
3997
3998 #ifdef CONFIG_IWLWIFI_DEBUG
3999         atomic_set(&priv->restrict_refcnt, 0);
4000 #endif
4001         if (iwl_alloc_traffic_mem(priv))
4002                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4003
4004         /***************************
4005          * 2. Initializing PCI bus
4006          * *************************/
4007         if (pci_enable_device(pdev)) {
4008                 err = -ENODEV;
4009                 goto out_ieee80211_free_hw;
4010         }
4011
4012         pci_set_master(pdev);
4013
4014         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4015         if (!err)
4016                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4017         if (err) {
4018                 IWL_WARN(priv, "No suitable DMA available.\n");
4019                 goto out_pci_disable_device;
4020         }
4021
4022         pci_set_drvdata(pdev, priv);
4023         err = pci_request_regions(pdev, DRV_NAME);
4024         if (err)
4025                 goto out_pci_disable_device;
4026
4027         /***********************
4028          * 3. Read REV Register
4029          * ********************/
4030         priv->hw_base = pci_iomap(pdev, 0, 0);
4031         if (!priv->hw_base) {
4032                 err = -ENODEV;
4033                 goto out_pci_release_regions;
4034         }
4035
4036         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4037                         (unsigned long long) pci_resource_len(pdev, 0));
4038         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4039
4040         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4041          * PCI Tx retries from interfering with C3 CPU state */
4042         pci_write_config_byte(pdev, 0x41, 0x00);
4043
4044         /* these spin locks will be used in apm_ops.init and EEPROM access
4045          * we should init now
4046          */
4047         spin_lock_init(&priv->reg_lock);
4048         spin_lock_init(&priv->lock);
4049
4050         /***********************
4051          * 4. Read EEPROM
4052          * ********************/
4053
4054         /* Read the EEPROM */
4055         err = iwl_eeprom_init(priv);
4056         if (err) {
4057                 IWL_ERR(priv, "Unable to init EEPROM\n");
4058                 goto out_iounmap;
4059         }
4060         /* MAC Address location in EEPROM same for 3945/4965 */
4061         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4062         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4063         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4064         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4065
4066         /***********************
4067          * 5. Setup HW Constants
4068          * ********************/
4069         /* Device-specific setup */
4070         if (iwl3945_hw_set_hw_params(priv)) {
4071                 IWL_ERR(priv, "failed to set hw settings\n");
4072                 goto out_eeprom_free;
4073         }
4074
4075         /***********************
4076          * 6. Setup priv
4077          * ********************/
4078
4079         err = iwl3945_init_drv(priv);
4080         if (err) {
4081                 IWL_ERR(priv, "initializing driver failed\n");
4082                 goto out_unset_hw_params;
4083         }
4084
4085         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4086                 priv->cfg->name);
4087
4088         /***********************
4089          * 7. Setup Services
4090          * ********************/
4091
4092         spin_lock_irqsave(&priv->lock, flags);
4093         iwl_disable_interrupts(priv);
4094         spin_unlock_irqrestore(&priv->lock, flags);
4095
4096         pci_enable_msi(priv->pci_dev);
4097
4098         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4099                           IRQF_SHARED, DRV_NAME, priv);
4100         if (err) {
4101                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4102                 goto out_disable_msi;
4103         }
4104
4105         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4106         if (err) {
4107                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4108                 goto out_release_irq;
4109         }
4110
4111         iwl_set_rxon_channel(priv,
4112                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4113         iwl3945_setup_deferred_work(priv);
4114         iwl3945_setup_rx_handlers(priv);
4115         iwl_power_initialize(priv);
4116
4117         /*********************************
4118          * 8. Setup and Register mac80211
4119          * *******************************/
4120
4121         iwl_enable_interrupts(priv);
4122
4123         err = iwl3945_setup_mac(priv);
4124         if (err)
4125                 goto  out_remove_sysfs;
4126
4127         err = iwl_dbgfs_register(priv, DRV_NAME);
4128         if (err)
4129                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4130
4131         /* Start monitoring the killswitch */
4132         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4133                            2 * HZ);
4134
4135         return 0;
4136
4137  out_remove_sysfs:
4138         destroy_workqueue(priv->workqueue);
4139         priv->workqueue = NULL;
4140         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4141  out_release_irq:
4142         free_irq(priv->pci_dev->irq, priv);
4143  out_disable_msi:
4144         pci_disable_msi(priv->pci_dev);
4145         iwlcore_free_geos(priv);
4146         iwl_free_channel_map(priv);
4147  out_unset_hw_params:
4148         iwl3945_unset_hw_params(priv);
4149  out_eeprom_free:
4150         iwl_eeprom_free(priv);
4151  out_iounmap:
4152         pci_iounmap(pdev, priv->hw_base);
4153  out_pci_release_regions:
4154         pci_release_regions(pdev);
4155  out_pci_disable_device:
4156         pci_set_drvdata(pdev, NULL);
4157         pci_disable_device(pdev);
4158  out_ieee80211_free_hw:
4159         iwl_free_traffic_mem(priv);
4160         ieee80211_free_hw(priv->hw);
4161  out:
4162         return err;
4163 }
4164
4165 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4166 {
4167         struct iwl_priv *priv = pci_get_drvdata(pdev);
4168         unsigned long flags;
4169
4170         if (!priv)
4171                 return;
4172
4173         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4174
4175         iwl_dbgfs_unregister(priv);
4176
4177         set_bit(STATUS_EXIT_PENDING, &priv->status);
4178
4179         if (priv->mac80211_registered) {
4180                 ieee80211_unregister_hw(priv->hw);
4181                 priv->mac80211_registered = 0;
4182         } else {
4183                 iwl3945_down(priv);
4184         }
4185
4186         /*
4187          * Make sure device is reset to low power before unloading driver.
4188          * This may be redundant with iwl_down(), but there are paths to
4189          * run iwl_down() without calling apm_ops.stop(), and there are
4190          * paths to avoid running iwl_down() at all before leaving driver.
4191          * This (inexpensive) call *makes sure* device is reset.
4192          */
4193         priv->cfg->ops->lib->apm_ops.stop(priv);
4194
4195         /* make sure we flush any pending irq or
4196          * tasklet for the driver
4197          */
4198         spin_lock_irqsave(&priv->lock, flags);
4199         iwl_disable_interrupts(priv);
4200         spin_unlock_irqrestore(&priv->lock, flags);
4201
4202         iwl_synchronize_irq(priv);
4203
4204         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4205
4206         cancel_delayed_work_sync(&priv->rfkill_poll);
4207
4208         iwl3945_dealloc_ucode_pci(priv);
4209
4210         if (priv->rxq.bd)
4211                 iwl3945_rx_queue_free(priv, &priv->rxq);
4212         iwl3945_hw_txq_ctx_free(priv);
4213
4214         iwl3945_unset_hw_params(priv);
4215         iwl_clear_stations_table(priv);
4216
4217         /*netif_stop_queue(dev); */
4218         flush_workqueue(priv->workqueue);
4219
4220         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4221          * priv->workqueue... so we can't take down the workqueue
4222          * until now... */
4223         destroy_workqueue(priv->workqueue);
4224         priv->workqueue = NULL;
4225         iwl_free_traffic_mem(priv);
4226
4227         free_irq(pdev->irq, priv);
4228         pci_disable_msi(pdev);
4229
4230         pci_iounmap(pdev, priv->hw_base);
4231         pci_release_regions(pdev);
4232         pci_disable_device(pdev);
4233         pci_set_drvdata(pdev, NULL);
4234
4235         iwl_free_channel_map(priv);
4236         iwlcore_free_geos(priv);
4237         kfree(priv->scan);
4238         if (priv->ibss_beacon)
4239                 dev_kfree_skb(priv->ibss_beacon);
4240
4241         ieee80211_free_hw(priv->hw);
4242 }
4243
4244
4245 /*****************************************************************************
4246  *
4247  * driver and module entry point
4248  *
4249  *****************************************************************************/
4250
4251 static struct pci_driver iwl3945_driver = {
4252         .name = DRV_NAME,
4253         .id_table = iwl3945_hw_card_ids,
4254         .probe = iwl3945_pci_probe,
4255         .remove = __devexit_p(iwl3945_pci_remove),
4256 #ifdef CONFIG_PM
4257         .suspend = iwl_pci_suspend,
4258         .resume = iwl_pci_resume,
4259 #endif
4260 };
4261
4262 static int __init iwl3945_init(void)
4263 {
4264
4265         int ret;
4266         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4267         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4268
4269         ret = iwl3945_rate_control_register();
4270         if (ret) {
4271                 printk(KERN_ERR DRV_NAME
4272                        "Unable to register rate control algorithm: %d\n", ret);
4273                 return ret;
4274         }
4275
4276         ret = pci_register_driver(&iwl3945_driver);
4277         if (ret) {
4278                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4279                 goto error_register;
4280         }
4281
4282         return ret;
4283
4284 error_register:
4285         iwl3945_rate_control_unregister();
4286         return ret;
4287 }
4288
4289 static void __exit iwl3945_exit(void)
4290 {
4291         pci_unregister_driver(&iwl3945_driver);
4292         iwl3945_rate_control_unregister();
4293 }
4294
4295 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4296
4297 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4298 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4299 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4300 MODULE_PARM_DESC(swcrypto,
4301                  "using software crypto (default 1 [software])\n");
4302 #ifdef CONFIG_IWLWIFI_DEBUG
4303 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4304 MODULE_PARM_DESC(debug, "debug output mask");
4305 #endif
4306 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4307                    int, S_IRUGO);
4308 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4309 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4310 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4311
4312 module_exit(iwl3945_exit);
4313 module_init(iwl3945_init);