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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/pci.h>
  36 #include <linux/pci-aspm.h>
  37 #include <linux/slab.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/sched.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/wireless.h>
  44 #include <linux/firmware.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/if_arp.h>
  47
  48 #include <net/ieee80211_radiotap.h>
  49 #include <net/mac80211.h>
  50
  51 #include <asm/div64.h>
  52
  53 #define DRV_NAME        "iwl3945"
  54
  55 #include "iwl-fh.h"
  56 #include "iwl-3945-fh.h"
  57 #include "iwl-commands.h"
  58 #include "iwl-sta.h"
  59 #include "iwl-3945.h"
  60 #include "iwl-core.h"
  61 #include "iwl-helpers.h"
  62 #include "iwl-dev.h"
  63 #include "iwl-spectrum.h"
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  */
  68
  69 #define DRV_DESCRIPTION \
  70 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 /*
  79  * add "s" to indicate spectrum measurement included.
  80  * we add it here to be consistent with previous releases in which
  81  * this was configurable.
  82  */
  83 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  84 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  85 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  86
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_VERSION(DRV_VERSION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  90 MODULE_LICENSE("GPL");
  91
  92  /* module parameters */
  93 struct iwl_mod_params iwl3945_mod_params = {
  94         .sw_crypto = 1,
  95         .restart_fw = 1,
  96         /* the rest are 0 by default */
  97 };
  98
  99 /**
 100  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 101  * @priv: eeprom and antenna fields are used to determine antenna flags
 102  *
 103  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 104  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 105  *
 106  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 107  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 108  * IWL_ANTENNA_AUX       - Force AUX antenna
 109  */
 110 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 111 {
 112         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 113
 114         switch (iwl3945_mod_params.antenna) {
 115         case IWL_ANTENNA_DIVERSITY:
 116                 return 0;
 117
 118         case IWL_ANTENNA_MAIN:
 119                 if (eeprom->antenna_switch_type)
 120                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 121                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122
 123         case IWL_ANTENNA_AUX:
 124                 if (eeprom->antenna_switch_type)
 125                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 126                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 127         }
 128
 129         /* bad antenna selector value */
 130         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 131                 iwl3945_mod_params.antenna);
 132
 133         return 0;               /* "diversity" is default if error */
 134 }
 135
 136 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 137                                    struct ieee80211_key_conf *keyconf,
 138                                    u8 sta_id)
 139 {
 140         unsigned long flags;
 141         __le16 key_flags = 0;
 142         int ret;
 143
 144         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 145         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 146
 147         if (sta_id == priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id)
 148                 key_flags |= STA_KEY_MULTICAST_MSK;
 149
 150         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 151         keyconf->hw_key_idx = keyconf->keyidx;
 152         key_flags &= ~STA_KEY_FLG_INVALID;
 153
 154         spin_lock_irqsave(&priv->sta_lock, flags);
 155         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 156         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 157         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 161                keyconf->keylen);
 162
 163         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 164                         == STA_KEY_FLG_NO_ENC)
 165                 priv->stations[sta_id].sta.key.key_offset =
 166                                  iwl_get_free_ucode_key_index(priv);
 167         /* else, we are overriding an existing key => no need to allocated room
 168         * in uCode. */
 169
 170         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 171                 "no space for a new key");
 172
 173         priv->stations[sta_id].sta.key.key_flags = key_flags;
 174         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 175         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 176
 177         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 178
 179         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 180
 181         spin_unlock_irqrestore(&priv->sta_lock, flags);
 182
 183         return ret;
 184 }
 185
 186 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 187                                   struct ieee80211_key_conf *keyconf,
 188                                   u8 sta_id)
 189 {
 190         return -EOPNOTSUPP;
 191 }
 192
 193 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 194                                   struct ieee80211_key_conf *keyconf,
 195                                   u8 sta_id)
 196 {
 197         return -EOPNOTSUPP;
 198 }
 199
 200 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 201 {
 202         unsigned long flags;
 203         struct iwl_addsta_cmd sta_cmd;
 204
 205         spin_lock_irqsave(&priv->sta_lock, flags);
 206         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 207         memset(&priv->stations[sta_id].sta.key, 0,
 208                 sizeof(struct iwl4965_keyinfo));
 209         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 210         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 211         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 212         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 213         spin_unlock_irqrestore(&priv->sta_lock, flags);
 214
 215         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 216         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 217 }
 218
 219 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 220                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 221 {
 222         int ret = 0;
 223
 224         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 225
 226         switch (keyconf->cipher) {
 227         case WLAN_CIPHER_SUITE_CCMP:
 228                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 229                 break;
 230         case WLAN_CIPHER_SUITE_TKIP:
 231                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 232                 break;
 233         case WLAN_CIPHER_SUITE_WEP40:
 234         case WLAN_CIPHER_SUITE_WEP104:
 235                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 236                 break;
 237         default:
 238                 IWL_ERR(priv, "Unknown alg: %s alg=%x\n", __func__,
 239                         keyconf->cipher);
 240                 ret = -EINVAL;
 241         }
 242
 243         IWL_DEBUG_WEP(priv, "Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 244                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 245                       sta_id, ret);
 246
 247         return ret;
 248 }
 249
 250 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 251 {
 252         int ret = -EOPNOTSUPP;
 253
 254         return ret;
 255 }
 256
 257 static int iwl3945_set_static_key(struct iwl_priv *priv,
 258                                 struct ieee80211_key_conf *key)
 259 {
 260         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 261             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 262                 return -EOPNOTSUPP;
 263
 264         IWL_ERR(priv, "Static key invalid: cipher %x\n", key->cipher);
 265         return -EINVAL;
 266 }
 267
 268 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 269 {
 270         struct list_head *element;
 271
 272         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 273                        priv->frames_count);
 274
 275         while (!list_empty(&priv->free_frames)) {
 276                 element = priv->free_frames.next;
 277                 list_del(element);
 278                 kfree(list_entry(element, struct iwl3945_frame, list));
 279                 priv->frames_count--;
 280         }
 281
 282         if (priv->frames_count) {
 283                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 284                             priv->frames_count);
 285                 priv->frames_count = 0;
 286         }
 287 }
 288
 289 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 290 {
 291         struct iwl3945_frame *frame;
 292         struct list_head *element;
 293         if (list_empty(&priv->free_frames)) {
 294                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 295                 if (!frame) {
 296                         IWL_ERR(priv, "Could not allocate frame!\n");
 297                         return NULL;
 298                 }
 299
 300                 priv->frames_count++;
 301                 return frame;
 302         }
 303
 304         element = priv->free_frames.next;
 305         list_del(element);
 306         return list_entry(element, struct iwl3945_frame, list);
 307 }
 308
 309 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 310 {
 311         memset(frame, 0, sizeof(*frame));
 312         list_add(&frame->list, &priv->free_frames);
 313 }
 314
 315 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 316                                 struct ieee80211_hdr *hdr,
 317                                 int left)
 318 {
 319
 320         if (!iwl_is_associated(priv, IWL_RXON_CTX_BSS) || !priv->ibss_beacon)
 321                 return 0;
 322
 323         if (priv->ibss_beacon->len > left)
 324                 return 0;
 325
 326         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 327
 328         return priv->ibss_beacon->len;
 329 }
 330
 331 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 332 {
 333         struct iwl3945_frame *frame;
 334         unsigned int frame_size;
 335         int rc;
 336         u8 rate;
 337
 338         frame = iwl3945_get_free_frame(priv);
 339
 340         if (!frame) {
 341                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 342                           "command.\n");
 343                 return -ENOMEM;
 344         }
 345
 346         rate = iwl_rate_get_lowest_plcp(priv,
 347                                 &priv->contexts[IWL_RXON_CTX_BSS]);
 348
 349         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 350
 351         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 352                               &frame->u.cmd[0]);
 353
 354         iwl3945_free_frame(priv, frame);
 355
 356         return rc;
 357 }
 358
 359 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 360 {
 361         if (priv->_3945.shared_virt)
 362                 dma_free_coherent(&priv->pci_dev->dev,
 363                                   sizeof(struct iwl3945_shared),
 364                                   priv->_3945.shared_virt,
 365                                   priv->_3945.shared_phys);
 366 }
 367
 368 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 369                                       struct ieee80211_tx_info *info,
 370                                       struct iwl_device_cmd *cmd,
 371                                       struct sk_buff *skb_frag,
 372                                       int sta_id)
 373 {
 374         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 375         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 376
 377         tx_cmd->sec_ctl = 0;
 378
 379         switch (keyinfo->cipher) {
 380         case WLAN_CIPHER_SUITE_CCMP:
 381                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 382                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 383                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 384                 break;
 385
 386         case WLAN_CIPHER_SUITE_TKIP:
 387                 break;
 388
 389         case WLAN_CIPHER_SUITE_WEP104:
 390                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 391                 /* fall through */
 392         case WLAN_CIPHER_SUITE_WEP40:
 393                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 394                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 395
 396                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 397
 398                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 399                              "with key %d\n", info->control.hw_key->hw_key_idx);
 400                 break;
 401
 402         default:
 403                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyinfo->cipher);
 404                 break;
 405         }
 406 }
 407
 408 /*
 409  * handle build REPLY_TX command notification.
 410  */
 411 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 412                                   struct iwl_device_cmd *cmd,
 413                                   struct ieee80211_tx_info *info,
 414                                   struct ieee80211_hdr *hdr, u8 std_id)
 415 {
 416         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 417         __le32 tx_flags = tx_cmd->tx_flags;
 418         __le16 fc = hdr->frame_control;
 419
 420         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 421         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 422                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 423                 if (ieee80211_is_mgmt(fc))
 424                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 425                 if (ieee80211_is_probe_resp(fc) &&
 426                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 427                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 428         } else {
 429                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 430                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 431         }
 432
 433         tx_cmd->sta_id = std_id;
 434         if (ieee80211_has_morefrags(fc))
 435                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 436
 437         if (ieee80211_is_data_qos(fc)) {
 438                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 439                 tx_cmd->tid_tspec = qc[0] & 0xf;
 440                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 441         } else {
 442                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 443         }
 444
 445         priv->cfg->ops->utils->tx_cmd_protection(priv, info, fc, &tx_flags);
 446
 447         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 448         if (ieee80211_is_mgmt(fc)) {
 449                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 450                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 451                 else
 452                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 453         } else {
 454                 tx_cmd->timeout.pm_frame_timeout = 0;
 455         }
 456
 457         tx_cmd->driver_txop = 0;
 458         tx_cmd->tx_flags = tx_flags;
 459         tx_cmd->next_frame_len = 0;
 460 }
 461
 462 /*
 463  * start REPLY_TX command process
 464  */
 465 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 466 {
 467         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 468         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 469         struct iwl3945_tx_cmd *tx_cmd;
 470         struct iwl_tx_queue *txq = NULL;
 471         struct iwl_queue *q = NULL;
 472         struct iwl_device_cmd *out_cmd;
 473         struct iwl_cmd_meta *out_meta;
 474         dma_addr_t phys_addr;
 475         dma_addr_t txcmd_phys;
 476         int txq_id = skb_get_queue_mapping(skb);
 477         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 478         u8 id;
 479         u8 unicast;
 480         u8 sta_id;
 481         u8 tid = 0;
 482         __le16 fc;
 483         u8 wait_write_ptr = 0;
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&priv->lock, flags);
 487         if (iwl_is_rfkill(priv)) {
 488                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 489                 goto drop_unlock;
 490         }
 491
 492         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 493                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 494                 goto drop_unlock;
 495         }
 496
 497         unicast = !is_multicast_ether_addr(hdr->addr1);
 498         id = 0;
 499
 500         fc = hdr->frame_control;
 501
 502 #ifdef CONFIG_IWLWIFI_DEBUG
 503         if (ieee80211_is_auth(fc))
 504                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 505         else if (ieee80211_is_assoc_req(fc))
 506                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 507         else if (ieee80211_is_reassoc_req(fc))
 508                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 509 #endif
 510
 511         spin_unlock_irqrestore(&priv->lock, flags);
 512
 513         hdr_len = ieee80211_hdrlen(fc);
 514
 515         /* Find index into station table for destination station */
 516         sta_id = iwl_sta_id_or_broadcast(
 517                         priv, &priv->contexts[IWL_RXON_CTX_BSS],
 518                         info->control.sta);
 519         if (sta_id == IWL_INVALID_STATION) {
 520                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 521                                hdr->addr1);
 522                 goto drop;
 523         }
 524
 525         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 526
 527         if (ieee80211_is_data_qos(fc)) {
 528                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 529                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 530                 if (unlikely(tid >= MAX_TID_COUNT))
 531                         goto drop;
 532         }
 533
 534         /* Descriptor for chosen Tx queue */
 535         txq = &priv->txq[txq_id];
 536         q = &txq->q;
 537
 538         if ((iwl_queue_space(q) < q->high_mark))
 539                 goto drop;
 540
 541         spin_lock_irqsave(&priv->lock, flags);
 542
 543         idx = get_cmd_index(q, q->write_ptr, 0);
 544
 545         /* Set up driver data for this TFD */
 546         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 547         txq->txb[q->write_ptr].skb = skb;
 548         txq->txb[q->write_ptr].ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 549
 550         /* Init first empty entry in queue's array of Tx/cmd buffers */
 551         out_cmd = txq->cmd[idx];
 552         out_meta = &txq->meta[idx];
 553         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 554         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 555         memset(tx_cmd, 0, sizeof(*tx_cmd));
 556
 557         /*
 558          * Set up the Tx-command (not MAC!) header.
 559          * Store the chosen Tx queue and TFD index within the sequence field;
 560          * after Tx, uCode's Tx response will return this value so driver can
 561          * locate the frame within the tx queue and do post-tx processing.
 562          */
 563         out_cmd->hdr.cmd = REPLY_TX;
 564         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 565                                 INDEX_TO_SEQ(q->write_ptr)));
 566
 567         /* Copy MAC header from skb into command buffer */
 568         memcpy(tx_cmd->hdr, hdr, hdr_len);
 569
 570
 571         if (info->control.hw_key)
 572                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 573
 574         /* TODO need this for burst mode later on */
 575         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 576
 577         /* set is_hcca to 0; it probably will never be implemented */
 578         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 579
 580         /* Total # bytes to be transmitted */
 581         len = (u16)skb->len;
 582         tx_cmd->len = cpu_to_le16(len);
 583
 584         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 585         iwl_update_stats(priv, true, fc, len);
 586         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 587         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 588
 589         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 590                 txq->need_update = 1;
 591         } else {
 592                 wait_write_ptr = 1;
 593                 txq->need_update = 0;
 594         }
 595
 596         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 597                      le16_to_cpu(out_cmd->hdr.sequence));
 598         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 599         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 600         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 601                            ieee80211_hdrlen(fc));
 602
 603         /*
 604          * Use the first empty entry in this queue's command buffer array
 605          * to contain the Tx command and MAC header concatenated together
 606          * (payload data will be in another buffer).
 607          * Size of this varies, due to varying MAC header length.
 608          * If end is not dword aligned, we'll have 2 extra bytes at the end
 609          * of the MAC header (device reads on dword boundaries).
 610          * We'll tell device about this padding later.
 611          */
 612         len = sizeof(struct iwl3945_tx_cmd) +
 613                         sizeof(struct iwl_cmd_header) + hdr_len;
 614
 615         len_org = len;
 616         len = (len + 3) & ~3;
 617
 618         if (len_org != len)
 619                 len_org = 1;
 620         else
 621                 len_org = 0;
 622
 623         /* Physical address of this Tx command's header (not MAC header!),
 624          * within command buffer array. */
 625         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 626                                     len, PCI_DMA_TODEVICE);
 627         /* we do not map meta data ... so we can safely access address to
 628          * provide to unmap command*/
 629         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 630         dma_unmap_len_set(out_meta, len, len);
 631
 632         /* Add buffer containing Tx command and MAC(!) header to TFD's
 633          * first entry */
 634         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 635                                                    txcmd_phys, len, 1, 0);
 636
 637
 638         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 639          * if any (802.11 null frames have no payload). */
 640         len = skb->len - hdr_len;
 641         if (len) {
 642                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 643                                            len, PCI_DMA_TODEVICE);
 644                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 645                                                            phys_addr, len,
 646                                                            0, U32_PAD(len));
 647         }
 648
 649
 650         /* Tell device the write index *just past* this latest filled TFD */
 651         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 652         iwl_txq_update_write_ptr(priv, txq);
 653         spin_unlock_irqrestore(&priv->lock, flags);
 654
 655         if ((iwl_queue_space(q) < q->high_mark)
 656             && priv->mac80211_registered) {
 657                 if (wait_write_ptr) {
 658                         spin_lock_irqsave(&priv->lock, flags);
 659                         txq->need_update = 1;
 660                         iwl_txq_update_write_ptr(priv, txq);
 661                         spin_unlock_irqrestore(&priv->lock, flags);
 662                 }
 663
 664                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 665         }
 666
 667         return 0;
 668
 669 drop_unlock:
 670         spin_unlock_irqrestore(&priv->lock, flags);
 671 drop:
 672         return -1;
 673 }
 674
 675 static int iwl3945_get_measurement(struct iwl_priv *priv,
 676                                struct ieee80211_measurement_params *params,
 677                                u8 type)
 678 {
 679         struct iwl_spectrum_cmd spectrum;
 680         struct iwl_rx_packet *pkt;
 681         struct iwl_host_cmd cmd = {
 682                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 683                 .data = (void *)&spectrum,
 684                 .flags = CMD_WANT_SKB,
 685         };
 686         u32 add_time = le64_to_cpu(params->start_time);
 687         int rc;
 688         int spectrum_resp_status;
 689         int duration = le16_to_cpu(params->duration);
 690         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 691
 692         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS))
 693                 add_time = iwl_usecs_to_beacons(priv,
 694                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 695                         le16_to_cpu(ctx->timing.beacon_interval));
 696
 697         memset(&spectrum, 0, sizeof(spectrum));
 698
 699         spectrum.channel_count = cpu_to_le16(1);
 700         spectrum.flags =
 701             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 702         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 703         cmd.len = sizeof(spectrum);
 704         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 705
 706         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS))
 707                 spectrum.start_time =
 708                         iwl_add_beacon_time(priv,
 709                                 priv->_3945.last_beacon_time, add_time,
 710                                 le16_to_cpu(ctx->timing.beacon_interval));
 711         else
 712                 spectrum.start_time = 0;
 713
 714         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 715         spectrum.channels[0].channel = params->channel;
 716         spectrum.channels[0].type = type;
 717         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 718                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 719                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 720
 721         rc = iwl_send_cmd_sync(priv, &cmd);
 722         if (rc)
 723                 return rc;
 724
 725         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 726         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 727                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 728                 rc = -EIO;
 729         }
 730
 731         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 732         switch (spectrum_resp_status) {
 733         case 0:         /* Command will be handled */
 734                 if (pkt->u.spectrum.id != 0xff) {
 735                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 736                                                 pkt->u.spectrum.id);
 737                         priv->measurement_status &= ~MEASUREMENT_READY;
 738                 }
 739                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 740                 rc = 0;
 741                 break;
 742
 743         case 1:         /* Command will not be handled */
 744                 rc = -EAGAIN;
 745                 break;
 746         }
 747
 748         iwl_free_pages(priv, cmd.reply_page);
 749
 750         return rc;
 751 }
 752
 753 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 754                                struct iwl_rx_mem_buffer *rxb)
 755 {
 756         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 757         struct iwl_alive_resp *palive;
 758         struct delayed_work *pwork;
 759
 760         palive = &pkt->u.alive_frame;
 761
 762         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 763                        "0x%01X 0x%01X\n",
 764                        palive->is_valid, palive->ver_type,
 765                        palive->ver_subtype);
 766
 767         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 768                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 769                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 770                        sizeof(struct iwl_alive_resp));
 771                 pwork = &priv->init_alive_start;
 772         } else {
 773                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 774                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 775                        sizeof(struct iwl_alive_resp));
 776                 pwork = &priv->alive_start;
 777                 iwl3945_disable_events(priv);
 778         }
 779
 780         /* We delay the ALIVE response by 5ms to
 781          * give the HW RF Kill time to activate... */
 782         if (palive->is_valid == UCODE_VALID_OK)
 783                 queue_delayed_work(priv->workqueue, pwork,
 784                                    msecs_to_jiffies(5));
 785         else
 786                 IWL_WARN(priv, "uCode did not respond OK.\n");
 787 }
 788
 789 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 790                                  struct iwl_rx_mem_buffer *rxb)
 791 {
 792 #ifdef CONFIG_IWLWIFI_DEBUG
 793         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 794 #endif
 795
 796         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 797 }
 798
 799 static void iwl3945_bg_beacon_update(struct work_struct *work)
 800 {
 801         struct iwl_priv *priv =
 802                 container_of(work, struct iwl_priv, beacon_update);
 803         struct sk_buff *beacon;
 804
 805         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 806         beacon = ieee80211_beacon_get(priv->hw,
 807                         priv->contexts[IWL_RXON_CTX_BSS].vif);
 808
 809         if (!beacon) {
 810                 IWL_ERR(priv, "update beacon failed\n");
 811                 return;
 812         }
 813
 814         mutex_lock(&priv->mutex);
 815         /* new beacon skb is allocated every time; dispose previous.*/
 816         if (priv->ibss_beacon)
 817                 dev_kfree_skb(priv->ibss_beacon);
 818
 819         priv->ibss_beacon = beacon;
 820         mutex_unlock(&priv->mutex);
 821
 822         iwl3945_send_beacon_cmd(priv);
 823 }
 824
 825 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 826                                 struct iwl_rx_mem_buffer *rxb)
 827 {
 828         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 829         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 830 #ifdef CONFIG_IWLWIFI_DEBUG
 831         u8 rate = beacon->beacon_notify_hdr.rate;
 832
 833         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 834                 "tsf %d %d rate %d\n",
 835                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 836                 beacon->beacon_notify_hdr.failure_frame,
 837                 le32_to_cpu(beacon->ibss_mgr_status),
 838                 le32_to_cpu(beacon->high_tsf),
 839                 le32_to_cpu(beacon->low_tsf), rate);
 840 #endif
 841
 842         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 843
 844         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 845             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 846                 queue_work(priv->workqueue, &priv->beacon_update);
 847 }
 848
 849 /* Handle notification from uCode that card's power state is changing
 850  * due to software, hardware, or critical temperature RFKILL */
 851 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 852                                     struct iwl_rx_mem_buffer *rxb)
 853 {
 854         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 855         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 856         unsigned long status = priv->status;
 857
 858         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 859                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 860                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 861
 862         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 863                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 864
 865         if (flags & HW_CARD_DISABLED)
 866                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 867         else
 868                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 869
 870
 871         iwl_scan_cancel(priv);
 872
 873         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 874              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 875                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 876                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 877         else
 878                 wake_up_interruptible(&priv->wait_command_queue);
 879 }
 880
 881 /**
 882  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 883  *
 884  * Setup the RX handlers for each of the reply types sent from the uCode
 885  * to the host.
 886  *
 887  * This function chains into the hardware specific files for them to setup
 888  * any hardware specific handlers as well.
 889  */
 890 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 891 {
 892         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 893         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 894         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 895         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 896         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 897                         iwl_rx_spectrum_measure_notif;
 898         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 899         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 900             iwl_rx_pm_debug_statistics_notif;
 901         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 902
 903         /*
 904          * The same handler is used for both the REPLY to a discrete
 905          * statistics request from the host as well as for the periodic
 906          * statistics notifications (after received beacons) from the uCode.
 907          */
 908         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 909         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 910
 911         iwl_setup_rx_scan_handlers(priv);
 912         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 913
 914         /* Set up hardware specific Rx handlers */
 915         iwl3945_hw_rx_handler_setup(priv);
 916 }
 917
 918 /************************** RX-FUNCTIONS ****************************/
 919 /*
 920  * Rx theory of operation
 921  *
 922  * The host allocates 32 DMA target addresses and passes the host address
 923  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 924  * 0 to 31
 925  *
 926  * Rx Queue Indexes
 927  * The host/firmware share two index registers for managing the Rx buffers.
 928  *
 929  * The READ index maps to the first position that the firmware may be writing
 930  * to -- the driver can read up to (but not including) this position and get
 931  * good data.
 932  * The READ index is managed by the firmware once the card is enabled.
 933  *
 934  * The WRITE index maps to the last position the driver has read from -- the
 935  * position preceding WRITE is the last slot the firmware can place a packet.
 936  *
 937  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 938  * WRITE = READ.
 939  *
 940  * During initialization, the host sets up the READ queue position to the first
 941  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 942  *
 943  * When the firmware places a packet in a buffer, it will advance the READ index
 944  * and fire the RX interrupt.  The driver can then query the READ index and
 945  * process as many packets as possible, moving the WRITE index forward as it
 946  * resets the Rx queue buffers with new memory.
 947  *
 948  * The management in the driver is as follows:
 949  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 950  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 951  *   to replenish the iwl->rxq->rx_free.
 952  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 953  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 954  *   'processed' and 'read' driver indexes as well)
 955  * + A received packet is processed and handed to the kernel network stack,
 956  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 957  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 958  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 959  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 960  *   were enough free buffers and RX_STALLED is set it is cleared.
 961  *
 962  *
 963  * Driver sequence:
 964  *
 965  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 966  *                            iwl3945_rx_queue_restock
 967  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 968  *                            queue, updates firmware pointers, and updates
 969  *                            the WRITE index.  If insufficient rx_free buffers
 970  *                            are available, schedules iwl3945_rx_replenish
 971  *
 972  * -- enable interrupts --
 973  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 974  *                            READ INDEX, detaching the SKB from the pool.
 975  *                            Moves the packet buffer from queue to rx_used.
 976  *                            Calls iwl3945_rx_queue_restock to refill any empty
 977  *                            slots.
 978  * ...
 979  *
 980  */
 981
 982 /**
 983  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 984  */
 985 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 986                                           dma_addr_t dma_addr)
 987 {
 988         return cpu_to_le32((u32)dma_addr);
 989 }
 990
 991 /**
 992  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 993  *
 994  * If there are slots in the RX queue that need to be restocked,
 995  * and we have free pre-allocated buffers, fill the ranks as much
 996  * as we can, pulling from rx_free.
 997  *
 998  * This moves the 'write' index forward to catch up with 'processed', and
 999  * also updates the memory address in the firmware to reference the new
1000  * target buffer.
1001  */
1002 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1003 {
1004         struct iwl_rx_queue *rxq = &priv->rxq;
1005         struct list_head *element;
1006         struct iwl_rx_mem_buffer *rxb;
1007         unsigned long flags;
1008         int write;
1009
1010         spin_lock_irqsave(&rxq->lock, flags);
1011         write = rxq->write & ~0x7;
1012         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1013                 /* Get next free Rx buffer, remove from free list */
1014                 element = rxq->rx_free.next;
1015                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1016                 list_del(element);
1017
1018                 /* Point to Rx buffer via next RBD in circular buffer */
1019                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1020                 rxq->queue[rxq->write] = rxb;
1021                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1022                 rxq->free_count--;
1023         }
1024         spin_unlock_irqrestore(&rxq->lock, flags);
1025         /* If the pre-allocated buffer pool is dropping low, schedule to
1026          * refill it */
1027         if (rxq->free_count <= RX_LOW_WATERMARK)
1028                 queue_work(priv->workqueue, &priv->rx_replenish);
1029
1030
1031         /* If we've added more space for the firmware to place data, tell it.
1032          * Increment device's write pointer in multiples of 8. */
1033         if ((rxq->write_actual != (rxq->write & ~0x7))
1034             || (abs(rxq->write - rxq->read) > 7)) {
1035                 spin_lock_irqsave(&rxq->lock, flags);
1036                 rxq->need_update = 1;
1037                 spin_unlock_irqrestore(&rxq->lock, flags);
1038                 iwl_rx_queue_update_write_ptr(priv, rxq);
1039         }
1040 }
1041
1042 /**
1043  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1044  *
1045  * When moving to rx_free an SKB is allocated for the slot.
1046  *
1047  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1048  * This is called as a scheduled work item (except for during initialization)
1049  */
1050 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1051 {
1052         struct iwl_rx_queue *rxq = &priv->rxq;
1053         struct list_head *element;
1054         struct iwl_rx_mem_buffer *rxb;
1055         struct page *page;
1056         unsigned long flags;
1057         gfp_t gfp_mask = priority;
1058
1059         while (1) {
1060                 spin_lock_irqsave(&rxq->lock, flags);
1061
1062                 if (list_empty(&rxq->rx_used)) {
1063                         spin_unlock_irqrestore(&rxq->lock, flags);
1064                         return;
1065                 }
1066                 spin_unlock_irqrestore(&rxq->lock, flags);
1067
1068                 if (rxq->free_count > RX_LOW_WATERMARK)
1069                         gfp_mask |= __GFP_NOWARN;
1070
1071                 if (priv->hw_params.rx_page_order > 0)
1072                         gfp_mask |= __GFP_COMP;
1073
1074                 /* Alloc a new receive buffer */
1075                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1076                 if (!page) {
1077                         if (net_ratelimit())
1078                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1079                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1080                             net_ratelimit())
1081                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1082                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1083                                          rxq->free_count);
1084                         /* We don't reschedule replenish work here -- we will
1085                          * call the restock method and if it still needs
1086                          * more buffers it will schedule replenish */
1087                         break;
1088                 }
1089
1090                 spin_lock_irqsave(&rxq->lock, flags);
1091                 if (list_empty(&rxq->rx_used)) {
1092                         spin_unlock_irqrestore(&rxq->lock, flags);
1093                         __free_pages(page, priv->hw_params.rx_page_order);
1094                         return;
1095                 }
1096                 element = rxq->rx_used.next;
1097                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1098                 list_del(element);
1099                 spin_unlock_irqrestore(&rxq->lock, flags);
1100
1101                 rxb->page = page;
1102                 /* Get physical address of RB/SKB */
1103                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1104                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1105                                 PCI_DMA_FROMDEVICE);
1106
1107                 spin_lock_irqsave(&rxq->lock, flags);
1108
1109                 list_add_tail(&rxb->list, &rxq->rx_free);
1110                 rxq->free_count++;
1111                 priv->alloc_rxb_page++;
1112
1113                 spin_unlock_irqrestore(&rxq->lock, flags);
1114         }
1115 }
1116
1117 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1118 {
1119         unsigned long flags;
1120         int i;
1121         spin_lock_irqsave(&rxq->lock, flags);
1122         INIT_LIST_HEAD(&rxq->rx_free);
1123         INIT_LIST_HEAD(&rxq->rx_used);
1124         /* Fill the rx_used queue with _all_ of the Rx buffers */
1125         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1126                 /* In the reset function, these buffers may have been allocated
1127                  * to an SKB, so we need to unmap and free potential storage */
1128                 if (rxq->pool[i].page != NULL) {
1129                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1130                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1131                                 PCI_DMA_FROMDEVICE);
1132                         __iwl_free_pages(priv, rxq->pool[i].page);
1133                         rxq->pool[i].page = NULL;
1134                 }
1135                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1136         }
1137
1138         /* Set us so that we have processed and used all buffers, but have
1139          * not restocked the Rx queue with fresh buffers */
1140         rxq->read = rxq->write = 0;
1141         rxq->write_actual = 0;
1142         rxq->free_count = 0;
1143         spin_unlock_irqrestore(&rxq->lock, flags);
1144 }
1145
1146 void iwl3945_rx_replenish(void *data)
1147 {
1148         struct iwl_priv *priv = data;
1149         unsigned long flags;
1150
1151         iwl3945_rx_allocate(priv, GFP_KERNEL);
1152
1153         spin_lock_irqsave(&priv->lock, flags);
1154         iwl3945_rx_queue_restock(priv);
1155         spin_unlock_irqrestore(&priv->lock, flags);
1156 }
1157
1158 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1159 {
1160         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1161
1162         iwl3945_rx_queue_restock(priv);
1163 }
1164
1165
1166 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1167  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1168  * This free routine walks the list of POOL entries and if SKB is set to
1169  * non NULL it is unmapped and freed
1170  */
1171 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1172 {
1173         int i;
1174         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1175                 if (rxq->pool[i].page != NULL) {
1176                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1177                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1178                                 PCI_DMA_FROMDEVICE);
1179                         __iwl_free_pages(priv, rxq->pool[i].page);
1180                         rxq->pool[i].page = NULL;
1181                 }
1182         }
1183
1184         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1185                           rxq->bd_dma);
1186         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1187                           rxq->rb_stts, rxq->rb_stts_dma);
1188         rxq->bd = NULL;
1189         rxq->rb_stts  = NULL;
1190 }
1191
1192
1193 /* Convert linear signal-to-noise ratio into dB */
1194 static u8 ratio2dB[100] = {
1195 /*       0   1   2   3   4   5   6   7   8   9 */
1196          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1197         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1198         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1199         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1200         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1201         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1202         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1203         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1204         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1205         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1206 };
1207
1208 /* Calculates a relative dB value from a ratio of linear
1209  *   (i.e. not dB) signal levels.
1210  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1211 int iwl3945_calc_db_from_ratio(int sig_ratio)
1212 {
1213         /* 1000:1 or higher just report as 60 dB */
1214         if (sig_ratio >= 1000)
1215                 return 60;
1216
1217         /* 100:1 or higher, divide by 10 and use table,
1218          *   add 20 dB to make up for divide by 10 */
1219         if (sig_ratio >= 100)
1220                 return 20 + (int)ratio2dB[sig_ratio/10];
1221
1222         /* We shouldn't see this */
1223         if (sig_ratio < 1)
1224                 return 0;
1225
1226         /* Use table for ratios 1:1 - 99:1 */
1227         return (int)ratio2dB[sig_ratio];
1228 }
1229
1230 /**
1231  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1232  *
1233  * Uses the priv->rx_handlers callback function array to invoke
1234  * the appropriate handlers, including command responses,
1235  * frame-received notifications, and other notifications.
1236  */
1237 static void iwl3945_rx_handle(struct iwl_priv *priv)
1238 {
1239         struct iwl_rx_mem_buffer *rxb;
1240         struct iwl_rx_packet *pkt;
1241         struct iwl_rx_queue *rxq = &priv->rxq;
1242         u32 r, i;
1243         int reclaim;
1244         unsigned long flags;
1245         u8 fill_rx = 0;
1246         u32 count = 8;
1247         int total_empty = 0;
1248
1249         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1250          * buffer that the driver may process (last buffer filled by ucode). */
1251         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1252         i = rxq->read;
1253
1254         /* calculate total frames need to be restock after handling RX */
1255         total_empty = r - rxq->write_actual;
1256         if (total_empty < 0)
1257                 total_empty += RX_QUEUE_SIZE;
1258
1259         if (total_empty > (RX_QUEUE_SIZE / 2))
1260                 fill_rx = 1;
1261         /* Rx interrupt, but nothing sent from uCode */
1262         if (i == r)
1263                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1264
1265         while (i != r) {
1266                 int len;
1267
1268                 rxb = rxq->queue[i];
1269
1270                 /* If an RXB doesn't have a Rx queue slot associated with it,
1271                  * then a bug has been introduced in the queue refilling
1272                  * routines -- catch it here */
1273                 BUG_ON(rxb == NULL);
1274
1275                 rxq->queue[i] = NULL;
1276
1277                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1278                                PAGE_SIZE << priv->hw_params.rx_page_order,
1279                                PCI_DMA_FROMDEVICE);
1280                 pkt = rxb_addr(rxb);
1281
1282                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1283                 len += sizeof(u32); /* account for status word */
1284                 trace_iwlwifi_dev_rx(priv, pkt, len);
1285
1286                 /* Reclaim a command buffer only if this packet is a response
1287                  *   to a (driver-originated) command.
1288                  * If the packet (e.g. Rx frame) originated from uCode,
1289                  *   there is no command buffer to reclaim.
1290                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1291                  *   but apparently a few don't get set; catch them here. */
1292                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1293                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1294                         (pkt->hdr.cmd != REPLY_TX);
1295
1296                 /* Based on type of command response or notification,
1297                  *   handle those that need handling via function in
1298                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1299                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1300                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1301                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1302                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1303                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1304                 } else {
1305                         /* No handling needed */
1306                         IWL_DEBUG_RX(priv,
1307                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1308                                 r, i, get_cmd_string(pkt->hdr.cmd),
1309                                 pkt->hdr.cmd);
1310                 }
1311
1312                 /*
1313                  * XXX: After here, we should always check rxb->page
1314                  * against NULL before touching it or its virtual
1315                  * memory (pkt). Because some rx_handler might have
1316                  * already taken or freed the pages.
1317                  */
1318
1319                 if (reclaim) {
1320                         /* Invoke any callbacks, transfer the buffer to caller,
1321                          * and fire off the (possibly) blocking iwl_send_cmd()
1322                          * as we reclaim the driver command queue */
1323                         if (rxb->page)
1324                                 iwl_tx_cmd_complete(priv, rxb);
1325                         else
1326                                 IWL_WARN(priv, "Claim null rxb?\n");
1327                 }
1328
1329                 /* Reuse the page if possible. For notification packets and
1330                  * SKBs that fail to Rx correctly, add them back into the
1331                  * rx_free list for reuse later. */
1332                 spin_lock_irqsave(&rxq->lock, flags);
1333                 if (rxb->page != NULL) {
1334                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1335                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1336                                 PCI_DMA_FROMDEVICE);
1337                         list_add_tail(&rxb->list, &rxq->rx_free);
1338                         rxq->free_count++;
1339                 } else
1340                         list_add_tail(&rxb->list, &rxq->rx_used);
1341
1342                 spin_unlock_irqrestore(&rxq->lock, flags);
1343
1344                 i = (i + 1) & RX_QUEUE_MASK;
1345                 /* If there are a lot of unused frames,
1346                  * restock the Rx queue so ucode won't assert. */
1347                 if (fill_rx) {
1348                         count++;
1349                         if (count >= 8) {
1350                                 rxq->read = i;
1351                                 iwl3945_rx_replenish_now(priv);
1352                                 count = 0;
1353                         }
1354                 }
1355         }
1356
1357         /* Backtrack one entry */
1358         rxq->read = i;
1359         if (fill_rx)
1360                 iwl3945_rx_replenish_now(priv);
1361         else
1362                 iwl3945_rx_queue_restock(priv);
1363 }
1364
1365 /* call this function to flush any scheduled tasklet */
1366 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1367 {
1368         /* wait to make sure we flush pending tasklet*/
1369         synchronize_irq(priv->pci_dev->irq);
1370         tasklet_kill(&priv->irq_tasklet);
1371 }
1372
1373 static const char *desc_lookup(int i)
1374 {
1375         switch (i) {
1376         case 1:
1377                 return "FAIL";
1378         case 2:
1379                 return "BAD_PARAM";
1380         case 3:
1381                 return "BAD_CHECKSUM";
1382         case 4:
1383                 return "NMI_INTERRUPT";
1384         case 5:
1385                 return "SYSASSERT";
1386         case 6:
1387                 return "FATAL_ERROR";
1388         }
1389
1390         return "UNKNOWN";
1391 }
1392
1393 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1394 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1395
1396 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1397 {
1398         u32 i;
1399         u32 desc, time, count, base, data1;
1400         u32 blink1, blink2, ilink1, ilink2;
1401
1402         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1403
1404         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1405                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1406                 return;
1407         }
1408
1409
1410         count = iwl_read_targ_mem(priv, base);
1411
1412         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1413                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1414                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1415                         priv->status, count);
1416         }
1417
1418         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1419                   "ilink1  nmiPC   Line\n");
1420         for (i = ERROR_START_OFFSET;
1421              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1422              i += ERROR_ELEM_SIZE) {
1423                 desc = iwl_read_targ_mem(priv, base + i);
1424                 time =
1425                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1426                 blink1 =
1427                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1428                 blink2 =
1429                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1430                 ilink1 =
1431                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1432                 ilink2 =
1433                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1434                 data1 =
1435                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1436
1437                 IWL_ERR(priv,
1438                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1439                         desc_lookup(desc), desc, time, blink1, blink2,
1440                         ilink1, ilink2, data1);
1441                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1442                                         0, blink1, blink2, ilink1, ilink2);
1443         }
1444 }
1445
1446 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1447
1448 /**
1449  * iwl3945_print_event_log - Dump error event log to syslog
1450  *
1451  */
1452 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1453                                   u32 num_events, u32 mode,
1454                                   int pos, char **buf, size_t bufsz)
1455 {
1456         u32 i;
1457         u32 base;       /* SRAM byte address of event log header */
1458         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1459         u32 ptr;        /* SRAM byte address of log data */
1460         u32 ev, time, data; /* event log data */
1461         unsigned long reg_flags;
1462
1463         if (num_events == 0)
1464                 return pos;
1465
1466         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1467
1468         if (mode == 0)
1469                 event_size = 2 * sizeof(u32);
1470         else
1471                 event_size = 3 * sizeof(u32);
1472
1473         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1474
1475         /* Make sure device is powered up for SRAM reads */
1476         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1477         iwl_grab_nic_access(priv);
1478
1479         /* Set starting address; reads will auto-increment */
1480         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1481         rmb();
1482
1483         /* "time" is actually "data" for mode 0 (no timestamp).
1484          * place event id # at far right for easier visual parsing. */
1485         for (i = 0; i < num_events; i++) {
1486                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1487                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1488                 if (mode == 0) {
1489                         /* data, ev */
1490                         if (bufsz) {
1491                                 pos += scnprintf(*buf + pos, bufsz - pos,
1492                                                 "0x%08x:%04u\n",
1493                                                 time, ev);
1494                         } else {
1495                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1496                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1497                                                               time, ev);
1498                         }
1499                 } else {
1500                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1501                         if (bufsz) {
1502                                 pos += scnprintf(*buf + pos, bufsz - pos,
1503                                                 "%010u:0x%08x:%04u\n",
1504                                                  time, data, ev);
1505                         } else {
1506                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1507                                         time, data, ev);
1508                                 trace_iwlwifi_dev_ucode_event(priv, time,
1509                                                               data, ev);
1510                         }
1511                 }
1512         }
1513
1514         /* Allow device to power down */
1515         iwl_release_nic_access(priv);
1516         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1517         return pos;
1518 }
1519
1520 /**
1521  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1522  */
1523 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1524                                       u32 num_wraps, u32 next_entry,
1525                                       u32 size, u32 mode,
1526                                       int pos, char **buf, size_t bufsz)
1527 {
1528         /*
1529          * display the newest DEFAULT_LOG_ENTRIES entries
1530          * i.e the entries just before the next ont that uCode would fill.
1531          */
1532         if (num_wraps) {
1533                 if (next_entry < size) {
1534                         pos = iwl3945_print_event_log(priv,
1535                                              capacity - (size - next_entry),
1536                                              size - next_entry, mode,
1537                                              pos, buf, bufsz);
1538                         pos = iwl3945_print_event_log(priv, 0,
1539                                                       next_entry, mode,
1540                                                       pos, buf, bufsz);
1541                 } else
1542                         pos = iwl3945_print_event_log(priv, next_entry - size,
1543                                                       size, mode,
1544                                                       pos, buf, bufsz);
1545         } else {
1546                 if (next_entry < size)
1547                         pos = iwl3945_print_event_log(priv, 0,
1548                                                       next_entry, mode,
1549                                                       pos, buf, bufsz);
1550                 else
1551                         pos = iwl3945_print_event_log(priv, next_entry - size,
1552                                                       size, mode,
1553                                                       pos, buf, bufsz);
1554         }
1555         return pos;
1556 }
1557
1558 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1559
1560 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1561                             char **buf, bool display)
1562 {
1563         u32 base;       /* SRAM byte address of event log header */
1564         u32 capacity;   /* event log capacity in # entries */
1565         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1566         u32 num_wraps;  /* # times uCode wrapped to top of log */
1567         u32 next_entry; /* index of next entry to be written by uCode */
1568         u32 size;       /* # entries that we'll print */
1569         int pos = 0;
1570         size_t bufsz = 0;
1571
1572         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1573         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1574                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1575                 return  -EINVAL;
1576         }
1577
1578         /* event log header */
1579         capacity = iwl_read_targ_mem(priv, base);
1580         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1581         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1582         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1583
1584         if (capacity > priv->cfg->max_event_log_size) {
1585                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1586                         capacity, priv->cfg->max_event_log_size);
1587                 capacity = priv->cfg->max_event_log_size;
1588         }
1589
1590         if (next_entry > priv->cfg->max_event_log_size) {
1591                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1592                         next_entry, priv->cfg->max_event_log_size);
1593                 next_entry = priv->cfg->max_event_log_size;
1594         }
1595
1596         size = num_wraps ? capacity : next_entry;
1597
1598         /* bail out if nothing in log */
1599         if (size == 0) {
1600                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1601                 return pos;
1602         }
1603
1604 #ifdef CONFIG_IWLWIFI_DEBUG
1605         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1606                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1607                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1608 #else
1609         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1610                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1611 #endif
1612
1613         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1614                   size);
1615
1616 #ifdef CONFIG_IWLWIFI_DEBUG
1617         if (display) {
1618                 if (full_log)
1619                         bufsz = capacity * 48;
1620                 else
1621                         bufsz = size * 48;
1622                 *buf = kmalloc(bufsz, GFP_KERNEL);
1623                 if (!*buf)
1624                         return -ENOMEM;
1625         }
1626         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1627                 /* if uCode has wrapped back to top of log,
1628                  * start at the oldest entry,
1629                  * i.e the next one that uCode would fill.
1630                  */
1631                 if (num_wraps)
1632                         pos = iwl3945_print_event_log(priv, next_entry,
1633                                                 capacity - next_entry, mode,
1634                                                 pos, buf, bufsz);
1635
1636                 /* (then/else) start at top of log */
1637                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1638                                               pos, buf, bufsz);
1639         } else
1640                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1641                                                     next_entry, size, mode,
1642                                                     pos, buf, bufsz);
1643 #else
1644         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1645                                             next_entry, size, mode,
1646                                             pos, buf, bufsz);
1647 #endif
1648         return pos;
1649 }
1650
1651 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1652 {
1653         u32 inta, handled = 0;
1654         u32 inta_fh;
1655         unsigned long flags;
1656 #ifdef CONFIG_IWLWIFI_DEBUG
1657         u32 inta_mask;
1658 #endif
1659
1660         spin_lock_irqsave(&priv->lock, flags);
1661
1662         /* Ack/clear/reset pending uCode interrupts.
1663          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1664          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1665         inta = iwl_read32(priv, CSR_INT);
1666         iwl_write32(priv, CSR_INT, inta);
1667
1668         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1669          * Any new interrupts that happen after this, either while we're
1670          * in this tasklet, or later, will show up in next ISR/tasklet. */
1671         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1672         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1673
1674 #ifdef CONFIG_IWLWIFI_DEBUG
1675         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1676                 /* just for debug */
1677                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1678                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1679                               inta, inta_mask, inta_fh);
1680         }
1681 #endif
1682
1683         spin_unlock_irqrestore(&priv->lock, flags);
1684
1685         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1686          * atomic, make sure that inta covers all the interrupts that
1687          * we've discovered, even if FH interrupt came in just after
1688          * reading CSR_INT. */
1689         if (inta_fh & CSR39_FH_INT_RX_MASK)
1690                 inta |= CSR_INT_BIT_FH_RX;
1691         if (inta_fh & CSR39_FH_INT_TX_MASK)
1692                 inta |= CSR_INT_BIT_FH_TX;
1693
1694         /* Now service all interrupt bits discovered above. */
1695         if (inta & CSR_INT_BIT_HW_ERR) {
1696                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1697
1698                 /* Tell the device to stop sending interrupts */
1699                 iwl_disable_interrupts(priv);
1700
1701                 priv->isr_stats.hw++;
1702                 iwl_irq_handle_error(priv);
1703
1704                 handled |= CSR_INT_BIT_HW_ERR;
1705
1706                 return;
1707         }
1708
1709 #ifdef CONFIG_IWLWIFI_DEBUG
1710         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1711                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1712                 if (inta & CSR_INT_BIT_SCD) {
1713                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1714                                       "the frame/frames.\n");
1715                         priv->isr_stats.sch++;
1716                 }
1717
1718                 /* Alive notification via Rx interrupt will do the real work */
1719                 if (inta & CSR_INT_BIT_ALIVE) {
1720                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1721                         priv->isr_stats.alive++;
1722                 }
1723         }
1724 #endif
1725         /* Safely ignore these bits for debug checks below */
1726         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1727
1728         /* Error detected by uCode */
1729         if (inta & CSR_INT_BIT_SW_ERR) {
1730                 IWL_ERR(priv, "Microcode SW error detected. "
1731                         "Restarting 0x%X.\n", inta);
1732                 priv->isr_stats.sw++;
1733                 iwl_irq_handle_error(priv);
1734                 handled |= CSR_INT_BIT_SW_ERR;
1735         }
1736
1737         /* uCode wakes up after power-down sleep */
1738         if (inta & CSR_INT_BIT_WAKEUP) {
1739                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1740                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1741                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1742                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1743                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1744                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1745                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1746                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1747
1748                 priv->isr_stats.wakeup++;
1749                 handled |= CSR_INT_BIT_WAKEUP;
1750         }
1751
1752         /* All uCode command responses, including Tx command responses,
1753          * Rx "responses" (frame-received notification), and other
1754          * notifications from uCode come through here*/
1755         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1756                 iwl3945_rx_handle(priv);
1757                 priv->isr_stats.rx++;
1758                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1759         }
1760
1761         if (inta & CSR_INT_BIT_FH_TX) {
1762                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1763                 priv->isr_stats.tx++;
1764
1765                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1766                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1767                                         (FH39_SRVC_CHNL), 0x0);
1768                 handled |= CSR_INT_BIT_FH_TX;
1769         }
1770
1771         if (inta & ~handled) {
1772                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1773                 priv->isr_stats.unhandled++;
1774         }
1775
1776         if (inta & ~priv->inta_mask) {
1777                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1778                          inta & ~priv->inta_mask);
1779                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1780         }
1781
1782         /* Re-enable all interrupts */
1783         /* only Re-enable if disabled by irq */
1784         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1785                 iwl_enable_interrupts(priv);
1786
1787 #ifdef CONFIG_IWLWIFI_DEBUG
1788         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1789                 inta = iwl_read32(priv, CSR_INT);
1790                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1791                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1792                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1793                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1794         }
1795 #endif
1796 }
1797
1798 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1799                                                struct ieee80211_vif *vif,
1800                                                enum ieee80211_band band,
1801                                                struct iwl3945_scan_channel *scan_ch)
1802 {
1803         const struct ieee80211_supported_band *sband;
1804         u16 passive_dwell = 0;
1805         u16 active_dwell = 0;
1806         int added = 0;
1807         u8 channel = 0;
1808
1809         sband = iwl_get_hw_mode(priv, band);
1810         if (!sband) {
1811                 IWL_ERR(priv, "invalid band\n");
1812                 return added;
1813         }
1814
1815         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1816         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1817
1818         if (passive_dwell <= active_dwell)
1819                 passive_dwell = active_dwell + 1;
1820
1821
1822         channel = iwl_get_single_channel_number(priv, band);
1823
1824         if (channel) {
1825                 scan_ch->channel = channel;
1826                 scan_ch->type = 0;      /* passive */
1827                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1828                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1829                 /* Set txpower levels to defaults */
1830                 scan_ch->tpc.dsp_atten = 110;
1831                 if (band == IEEE80211_BAND_5GHZ)
1832                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1833                 else
1834                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1835                 added++;
1836         } else
1837                 IWL_ERR(priv, "no valid channel found\n");
1838         return added;
1839 }
1840
1841 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1842                                          enum ieee80211_band band,
1843                                      u8 is_active, u8 n_probes,
1844                                      struct iwl3945_scan_channel *scan_ch,
1845                                      struct ieee80211_vif *vif)
1846 {
1847         struct ieee80211_channel *chan;
1848         const struct ieee80211_supported_band *sband;
1849         const struct iwl_channel_info *ch_info;
1850         u16 passive_dwell = 0;
1851         u16 active_dwell = 0;
1852         int added, i;
1853
1854         sband = iwl_get_hw_mode(priv, band);
1855         if (!sband)
1856                 return 0;
1857
1858         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1859         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1860
1861         if (passive_dwell <= active_dwell)
1862                 passive_dwell = active_dwell + 1;
1863
1864         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1865                 chan = priv->scan_request->channels[i];
1866
1867                 if (chan->band != band)
1868                         continue;
1869
1870                 scan_ch->channel = chan->hw_value;
1871
1872                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1873                 if (!is_channel_valid(ch_info)) {
1874                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1875                                        scan_ch->channel);
1876                         continue;
1877                 }
1878
1879                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1880                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1881                 /* If passive , set up for auto-switch
1882                  *  and use long active_dwell time.
1883                  */
1884                 if (!is_active || is_channel_passive(ch_info) ||
1885                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1886                         scan_ch->type = 0;      /* passive */
1887                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1888                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1889                 } else {
1890                         scan_ch->type = 1;      /* active */
1891                 }
1892
1893                 /* Set direct probe bits. These may be used both for active
1894                  * scan channels (probes gets sent right away),
1895                  * or for passive channels (probes get se sent only after
1896                  * hearing clear Rx packet).*/
1897                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1898                         if (n_probes)
1899                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1900                 } else {
1901                         /* uCode v1 does not allow setting direct probe bits on
1902                          * passive channel. */
1903                         if ((scan_ch->type & 1) && n_probes)
1904                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1905                 }
1906
1907                 /* Set txpower levels to defaults */
1908                 scan_ch->tpc.dsp_atten = 110;
1909                 /* scan_pwr_info->tpc.dsp_atten; */
1910
1911                 /*scan_pwr_info->tpc.tx_gain; */
1912                 if (band == IEEE80211_BAND_5GHZ)
1913                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1914                 else {
1915                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1916                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1917                          * power level:
1918                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1919                          */
1920                 }
1921
1922                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1923                                scan_ch->channel,
1924                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1925                                (scan_ch->type & 1) ?
1926                                active_dwell : passive_dwell);
1927
1928                 scan_ch++;
1929                 added++;
1930         }
1931
1932         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1933         return added;
1934 }
1935
1936 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1937                               struct ieee80211_rate *rates)
1938 {
1939         int i;
1940
1941         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1942                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1943                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1944                 rates[i].hw_value_short = i;
1945                 rates[i].flags = 0;
1946                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1947                         /*
1948                          * If CCK != 1M then set short preamble rate flag.
1949                          */
1950                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1951                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1952                 }
1953         }
1954 }
1955
1956 /******************************************************************************
1957  *
1958  * uCode download functions
1959  *
1960  ******************************************************************************/
1961
1962 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1963 {
1964         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1965         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1966         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1967         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1968         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1969         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1970 }
1971
1972 /**
1973  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1974  *     looking at all data.
1975  */
1976 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1977 {
1978         u32 val;
1979         u32 save_len = len;
1980         int rc = 0;
1981         u32 errcnt;
1982
1983         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1984
1985         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1986                                IWL39_RTC_INST_LOWER_BOUND);
1987
1988         errcnt = 0;
1989         for (; len > 0; len -= sizeof(u32), image++) {
1990                 /* read data comes through single port, auto-incr addr */
1991                 /* NOTE: Use the debugless read so we don't flood kernel log
1992                  * if IWL_DL_IO is set */
1993                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1994                 if (val != le32_to_cpu(*image)) {
1995                         IWL_ERR(priv, "uCode INST section is invalid at "
1996                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1997                                   save_len - len, val, le32_to_cpu(*image));
1998                         rc = -EIO;
1999                         errcnt++;
2000                         if (errcnt >= 20)
2001                                 break;
2002                 }
2003         }
2004
2005
2006         if (!errcnt)
2007                 IWL_DEBUG_INFO(priv,
2008                         "ucode image in INSTRUCTION memory is good\n");
2009
2010         return rc;
2011 }
2012
2013
2014 /**
2015  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2016  *   using sample data 100 bytes apart.  If these sample points are good,
2017  *   it's a pretty good bet that everything between them is good, too.
2018  */
2019 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2020 {
2021         u32 val;
2022         int rc = 0;
2023         u32 errcnt = 0;
2024         u32 i;
2025
2026         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2027
2028         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2029                 /* read data comes through single port, auto-incr addr */
2030                 /* NOTE: Use the debugless read so we don't flood kernel log
2031                  * if IWL_DL_IO is set */
2032                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2033                         i + IWL39_RTC_INST_LOWER_BOUND);
2034                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2035                 if (val != le32_to_cpu(*image)) {
2036 #if 0 /* Enable this if you want to see details */
2037                         IWL_ERR(priv, "uCode INST section is invalid at "
2038                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2039                                   i, val, *image);
2040 #endif
2041                         rc = -EIO;
2042                         errcnt++;
2043                         if (errcnt >= 3)
2044                                 break;
2045                 }
2046         }
2047
2048         return rc;
2049 }
2050
2051
2052 /**
2053  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2054  *    and verify its contents
2055  */
2056 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2057 {
2058         __le32 *image;
2059         u32 len;
2060         int rc = 0;
2061
2062         /* Try bootstrap */
2063         image = (__le32 *)priv->ucode_boot.v_addr;
2064         len = priv->ucode_boot.len;
2065         rc = iwl3945_verify_inst_sparse(priv, image, len);
2066         if (rc == 0) {
2067                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2068                 return 0;
2069         }
2070
2071         /* Try initialize */
2072         image = (__le32 *)priv->ucode_init.v_addr;
2073         len = priv->ucode_init.len;
2074         rc = iwl3945_verify_inst_sparse(priv, image, len);
2075         if (rc == 0) {
2076                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2077                 return 0;
2078         }
2079
2080         /* Try runtime/protocol */
2081         image = (__le32 *)priv->ucode_code.v_addr;
2082         len = priv->ucode_code.len;
2083         rc = iwl3945_verify_inst_sparse(priv, image, len);
2084         if (rc == 0) {
2085                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2086                 return 0;
2087         }
2088
2089         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2090
2091         /* Since nothing seems to match, show first several data entries in
2092          * instruction SRAM, so maybe visual inspection will give a clue.
2093          * Selection of bootstrap image (vs. other images) is arbitrary. */
2094         image = (__le32 *)priv->ucode_boot.v_addr;
2095         len = priv->ucode_boot.len;
2096         rc = iwl3945_verify_inst_full(priv, image, len);
2097
2098         return rc;
2099 }
2100
2101 static void iwl3945_nic_start(struct iwl_priv *priv)
2102 {
2103         /* Remove all resets to allow NIC to operate */
2104         iwl_write32(priv, CSR_RESET, 0);
2105 }
2106
2107 #define IWL3945_UCODE_GET(item)                                         \
2108 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2109 {                                                                       \
2110         return le32_to_cpu(ucode->u.v1.item);                           \
2111 }
2112
2113 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2114 {
2115         return 24;
2116 }
2117
2118 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2119 {
2120         return (u8 *) ucode->u.v1.data;
2121 }
2122
2123 IWL3945_UCODE_GET(inst_size);
2124 IWL3945_UCODE_GET(data_size);
2125 IWL3945_UCODE_GET(init_size);
2126 IWL3945_UCODE_GET(init_data_size);
2127 IWL3945_UCODE_GET(boot_size);
2128
2129 /**
2130  * iwl3945_read_ucode - Read uCode images from disk file.
2131  *
2132  * Copy into buffers for card to fetch via bus-mastering
2133  */
2134 static int iwl3945_read_ucode(struct iwl_priv *priv)
2135 {
2136         const struct iwl_ucode_header *ucode;
2137         int ret = -EINVAL, index;
2138         const struct firmware *ucode_raw;
2139         /* firmware file name contains uCode/driver compatibility version */
2140         const char *name_pre = priv->cfg->fw_name_pre;
2141         const unsigned int api_max = priv->cfg->ucode_api_max;
2142         const unsigned int api_min = priv->cfg->ucode_api_min;
2143         char buf[25];
2144         u8 *src;
2145         size_t len;
2146         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2147
2148         /* Ask kernel firmware_class module to get the boot firmware off disk.
2149          * request_firmware() is synchronous, file is in memory on return. */
2150         for (index = api_max; index >= api_min; index--) {
2151                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2152                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2153                 if (ret < 0) {
2154                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2155                                   buf, ret);
2156                         if (ret == -ENOENT)
2157                                 continue;
2158                         else
2159                                 goto error;
2160                 } else {
2161                         if (index < api_max)
2162                                 IWL_ERR(priv, "Loaded firmware %s, "
2163                                         "which is deprecated. "
2164                                         " Please use API v%u instead.\n",
2165                                           buf, api_max);
2166                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2167                                        "(%zd bytes) from disk\n",
2168                                        buf, ucode_raw->size);
2169                         break;
2170                 }
2171         }
2172
2173         if (ret < 0)
2174                 goto error;
2175
2176         /* Make sure that we got at least our header! */
2177         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2178                 IWL_ERR(priv, "File size way too small!\n");
2179                 ret = -EINVAL;
2180                 goto err_release;
2181         }
2182
2183         /* Data from ucode file:  header followed by uCode images */
2184         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2185
2186         priv->ucode_ver = le32_to_cpu(ucode->ver);
2187         api_ver = IWL_UCODE_API(priv->ucode_ver);
2188         inst_size = iwl3945_ucode_get_inst_size(ucode);
2189         data_size = iwl3945_ucode_get_data_size(ucode);
2190         init_size = iwl3945_ucode_get_init_size(ucode);
2191         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2192         boot_size = iwl3945_ucode_get_boot_size(ucode);
2193         src = iwl3945_ucode_get_data(ucode);
2194
2195         /* api_ver should match the api version forming part of the
2196          * firmware filename ... but we don't check for that and only rely
2197          * on the API version read from firmware header from here on forward */
2198
2199         if (api_ver < api_min || api_ver > api_max) {
2200                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2201                           "Driver supports v%u, firmware is v%u.\n",
2202                           api_max, api_ver);
2203                 priv->ucode_ver = 0;
2204                 ret = -EINVAL;
2205                 goto err_release;
2206         }
2207         if (api_ver != api_max)
2208                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2209                           "got %u. New firmware can be obtained "
2210                           "from http://www.intellinuxwireless.org.\n",
2211                           api_max, api_ver);
2212
2213         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2214                 IWL_UCODE_MAJOR(priv->ucode_ver),
2215                 IWL_UCODE_MINOR(priv->ucode_ver),
2216                 IWL_UCODE_API(priv->ucode_ver),
2217                 IWL_UCODE_SERIAL(priv->ucode_ver));
2218
2219         snprintf(priv->hw->wiphy->fw_version,
2220                  sizeof(priv->hw->wiphy->fw_version),
2221                  "%u.%u.%u.%u",
2222                  IWL_UCODE_MAJOR(priv->ucode_ver),
2223                  IWL_UCODE_MINOR(priv->ucode_ver),
2224                  IWL_UCODE_API(priv->ucode_ver),
2225                  IWL_UCODE_SERIAL(priv->ucode_ver));
2226
2227         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2228                        priv->ucode_ver);
2229         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2230                        inst_size);
2231         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2232                        data_size);
2233         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2234                        init_size);
2235         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2236                        init_data_size);
2237         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2238                        boot_size);
2239
2240
2241         /* Verify size of file vs. image size info in file's header */
2242         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2243                 inst_size + data_size + init_size +
2244                 init_data_size + boot_size) {
2245
2246                 IWL_DEBUG_INFO(priv,
2247                         "uCode file size %zd does not match expected size\n",
2248                         ucode_raw->size);
2249                 ret = -EINVAL;
2250                 goto err_release;
2251         }
2252
2253         /* Verify that uCode images will fit in card's SRAM */
2254         if (inst_size > IWL39_MAX_INST_SIZE) {
2255                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2256                                inst_size);
2257                 ret = -EINVAL;
2258                 goto err_release;
2259         }
2260
2261         if (data_size > IWL39_MAX_DATA_SIZE) {
2262                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2263                                data_size);
2264                 ret = -EINVAL;
2265                 goto err_release;
2266         }
2267         if (init_size > IWL39_MAX_INST_SIZE) {
2268                 IWL_DEBUG_INFO(priv,
2269                                 "uCode init instr len %d too large to fit in\n",
2270                                 init_size);
2271                 ret = -EINVAL;
2272                 goto err_release;
2273         }
2274         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2275                 IWL_DEBUG_INFO(priv,
2276                                 "uCode init data len %d too large to fit in\n",
2277                                 init_data_size);
2278                 ret = -EINVAL;
2279                 goto err_release;
2280         }
2281         if (boot_size > IWL39_MAX_BSM_SIZE) {
2282                 IWL_DEBUG_INFO(priv,
2283                                 "uCode boot instr len %d too large to fit in\n",
2284                                 boot_size);
2285                 ret = -EINVAL;
2286                 goto err_release;
2287         }
2288
2289         /* Allocate ucode buffers for card's bus-master loading ... */
2290
2291         /* Runtime instructions and 2 copies of data:
2292          * 1) unmodified from disk
2293          * 2) backup cache for save/restore during power-downs */
2294         priv->ucode_code.len = inst_size;
2295         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2296
2297         priv->ucode_data.len = data_size;
2298         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2299
2300         priv->ucode_data_backup.len = data_size;
2301         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2302
2303         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2304             !priv->ucode_data_backup.v_addr)
2305                 goto err_pci_alloc;
2306
2307         /* Initialization instructions and data */
2308         if (init_size && init_data_size) {
2309                 priv->ucode_init.len = init_size;
2310                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2311
2312                 priv->ucode_init_data.len = init_data_size;
2313                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2314
2315                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2316                         goto err_pci_alloc;
2317         }
2318
2319         /* Bootstrap (instructions only, no data) */
2320         if (boot_size) {
2321                 priv->ucode_boot.len = boot_size;
2322                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2323
2324                 if (!priv->ucode_boot.v_addr)
2325                         goto err_pci_alloc;
2326         }
2327
2328         /* Copy images into buffers for card's bus-master reads ... */
2329
2330         /* Runtime instructions (first block of data in file) */
2331         len = inst_size;
2332         IWL_DEBUG_INFO(priv,
2333                 "Copying (but not loading) uCode instr len %zd\n", len);
2334         memcpy(priv->ucode_code.v_addr, src, len);
2335         src += len;
2336
2337         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2338                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2339
2340         /* Runtime data (2nd block)
2341          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2342         len = data_size;
2343         IWL_DEBUG_INFO(priv,
2344                 "Copying (but not loading) uCode data len %zd\n", len);
2345         memcpy(priv->ucode_data.v_addr, src, len);
2346         memcpy(priv->ucode_data_backup.v_addr, src, len);
2347         src += len;
2348
2349         /* Initialization instructions (3rd block) */
2350         if (init_size) {
2351                 len = init_size;
2352                 IWL_DEBUG_INFO(priv,
2353                         "Copying (but not loading) init instr len %zd\n", len);
2354                 memcpy(priv->ucode_init.v_addr, src, len);
2355                 src += len;
2356         }
2357
2358         /* Initialization data (4th block) */
2359         if (init_data_size) {
2360                 len = init_data_size;
2361                 IWL_DEBUG_INFO(priv,
2362                         "Copying (but not loading) init data len %zd\n", len);
2363                 memcpy(priv->ucode_init_data.v_addr, src, len);
2364                 src += len;
2365         }
2366
2367         /* Bootstrap instructions (5th block) */
2368         len = boot_size;
2369         IWL_DEBUG_INFO(priv,
2370                 "Copying (but not loading) boot instr len %zd\n", len);
2371         memcpy(priv->ucode_boot.v_addr, src, len);
2372
2373         /* We have our copies now, allow OS release its copies */
2374         release_firmware(ucode_raw);
2375         return 0;
2376
2377  err_pci_alloc:
2378         IWL_ERR(priv, "failed to allocate pci memory\n");
2379         ret = -ENOMEM;
2380         iwl3945_dealloc_ucode_pci(priv);
2381
2382  err_release:
2383         release_firmware(ucode_raw);
2384
2385  error:
2386         return ret;
2387 }
2388
2389
2390 /**
2391  * iwl3945_set_ucode_ptrs - Set uCode address location
2392  *
2393  * Tell initialization uCode where to find runtime uCode.
2394  *
2395  * BSM registers initially contain pointers to initialization uCode.
2396  * We need to replace them to load runtime uCode inst and data,
2397  * and to save runtime data when powering down.
2398  */
2399 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2400 {
2401         dma_addr_t pinst;
2402         dma_addr_t pdata;
2403
2404         /* bits 31:0 for 3945 */
2405         pinst = priv->ucode_code.p_addr;
2406         pdata = priv->ucode_data_backup.p_addr;
2407
2408         /* Tell bootstrap uCode where to find image to load */
2409         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2410         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2411         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2412                                  priv->ucode_data.len);
2413
2414         /* Inst byte count must be last to set up, bit 31 signals uCode
2415          *   that all new ptr/size info is in place */
2416         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2417                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2418
2419         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2420
2421         return 0;
2422 }
2423
2424 /**
2425  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2426  *
2427  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2428  *
2429  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2430  */
2431 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2432 {
2433         /* Check alive response for "valid" sign from uCode */
2434         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2435                 /* We had an error bringing up the hardware, so take it
2436                  * all the way back down so we can try again */
2437                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2438                 goto restart;
2439         }
2440
2441         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2442          * This is a paranoid check, because we would not have gotten the
2443          * "initialize" alive if code weren't properly loaded.  */
2444         if (iwl3945_verify_ucode(priv)) {
2445                 /* Runtime instruction load was bad;
2446                  * take it all the way back down so we can try again */
2447                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2448                 goto restart;
2449         }
2450
2451         /* Send pointers to protocol/runtime uCode image ... init code will
2452          * load and launch runtime uCode, which will send us another "Alive"
2453          * notification. */
2454         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2455         if (iwl3945_set_ucode_ptrs(priv)) {
2456                 /* Runtime instruction load won't happen;
2457                  * take it all the way back down so we can try again */
2458                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2459                 goto restart;
2460         }
2461         return;
2462
2463  restart:
2464         queue_work(priv->workqueue, &priv->restart);
2465 }
2466
2467 /**
2468  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2469  *                   from protocol/runtime uCode (initialization uCode's
2470  *                   Alive gets handled by iwl3945_init_alive_start()).
2471  */
2472 static void iwl3945_alive_start(struct iwl_priv *priv)
2473 {
2474         int thermal_spin = 0;
2475         u32 rfkill;
2476         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2477
2478         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2479
2480         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2481                 /* We had an error bringing up the hardware, so take it
2482                  * all the way back down so we can try again */
2483                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2484                 goto restart;
2485         }
2486
2487         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2488          * This is a paranoid check, because we would not have gotten the
2489          * "runtime" alive if code weren't properly loaded.  */
2490         if (iwl3945_verify_ucode(priv)) {
2491                 /* Runtime instruction load was bad;
2492                  * take it all the way back down so we can try again */
2493                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2494                 goto restart;
2495         }
2496
2497         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2498         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2499
2500         if (rfkill & 0x1) {
2501                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2502                 /* if RFKILL is not on, then wait for thermal
2503                  * sensor in adapter to kick in */
2504                 while (iwl3945_hw_get_temperature(priv) == 0) {
2505                         thermal_spin++;
2506                         udelay(10);
2507                 }
2508
2509                 if (thermal_spin)
2510                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2511                                        thermal_spin * 10);
2512         } else
2513                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2514
2515         /* After the ALIVE response, we can send commands to 3945 uCode */
2516         set_bit(STATUS_ALIVE, &priv->status);
2517
2518         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2519                 /* Enable timer to monitor the driver queues */
2520                 mod_timer(&priv->monitor_recover,
2521                         jiffies +
2522                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2523         }
2524
2525         if (iwl_is_rfkill(priv))
2526                 return;
2527
2528         ieee80211_wake_queues(priv->hw);
2529
2530         priv->active_rate = IWL_RATES_MASK;
2531
2532         iwl_power_update_mode(priv, true);
2533
2534         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS)) {
2535                 struct iwl3945_rxon_cmd *active_rxon =
2536                                 (struct iwl3945_rxon_cmd *)(&ctx->active);
2537
2538                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2539                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2540         } else {
2541                 /* Initialize our rx_config data */
2542                 iwl_connection_init_rx_config(priv, ctx);
2543         }
2544
2545         /* Configure Bluetooth device coexistence support */
2546         priv->cfg->ops->hcmd->send_bt_config(priv);
2547
2548         /* Configure the adapter for unassociated operation */
2549         iwlcore_commit_rxon(priv, ctx);
2550
2551         iwl3945_reg_txpower_periodic(priv);
2552
2553         iwl_leds_init(priv);
2554
2555         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2556         set_bit(STATUS_READY, &priv->status);
2557         wake_up_interruptible(&priv->wait_command_queue);
2558
2559         return;
2560
2561  restart:
2562         queue_work(priv->workqueue, &priv->restart);
2563 }
2564
2565 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2566
2567 static void __iwl3945_down(struct iwl_priv *priv)
2568 {
2569         unsigned long flags;
2570         int exit_pending;
2571
2572         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2573
2574         iwl_scan_cancel_timeout(priv, 200);
2575
2576         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2577
2578         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2579          * to prevent rearm timer */
2580         if (priv->cfg->ops->lib->recover_from_tx_stall)
2581                 del_timer_sync(&priv->monitor_recover);
2582
2583         /* Station information will now be cleared in device */
2584         iwl_clear_ucode_stations(priv, NULL);
2585         iwl_dealloc_bcast_stations(priv);
2586         iwl_clear_driver_stations(priv);
2587
2588         /* Unblock any waiting calls */
2589         wake_up_interruptible_all(&priv->wait_command_queue);
2590
2591         /* Wipe out the EXIT_PENDING status bit if we are not actually
2592          * exiting the module */
2593         if (!exit_pending)
2594                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2595
2596         /* stop and reset the on-board processor */
2597         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2598
2599         /* tell the device to stop sending interrupts */
2600         spin_lock_irqsave(&priv->lock, flags);
2601         iwl_disable_interrupts(priv);
2602         spin_unlock_irqrestore(&priv->lock, flags);
2603         iwl_synchronize_irq(priv);
2604
2605         if (priv->mac80211_registered)
2606                 ieee80211_stop_queues(priv->hw);
2607
2608         /* If we have not previously called iwl3945_init() then
2609          * clear all bits but the RF Kill bits and return */
2610         if (!iwl_is_init(priv)) {
2611                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2612                                         STATUS_RF_KILL_HW |
2613                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2614                                         STATUS_GEO_CONFIGURED |
2615                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2616                                         STATUS_EXIT_PENDING;
2617                 goto exit;
2618         }
2619
2620         /* ...otherwise clear out all the status bits but the RF Kill
2621          * bit and continue taking the NIC down. */
2622         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2623                                 STATUS_RF_KILL_HW |
2624                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2625                                 STATUS_GEO_CONFIGURED |
2626                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2627                                 STATUS_FW_ERROR |
2628                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2629                                 STATUS_EXIT_PENDING;
2630
2631         iwl3945_hw_txq_ctx_stop(priv);
2632         iwl3945_hw_rxq_stop(priv);
2633
2634         /* Power-down device's busmaster DMA clocks */
2635         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2636         udelay(5);
2637
2638         /* Stop the device, and put it in low power state */
2639         priv->cfg->ops->lib->apm_ops.stop(priv);
2640
2641  exit:
2642         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2643
2644         if (priv->ibss_beacon)
2645                 dev_kfree_skb(priv->ibss_beacon);
2646         priv->ibss_beacon = NULL;
2647
2648         /* clear out any free frames */
2649         iwl3945_clear_free_frames(priv);
2650 }
2651
2652 static void iwl3945_down(struct iwl_priv *priv)
2653 {
2654         mutex_lock(&priv->mutex);
2655         __iwl3945_down(priv);
2656         mutex_unlock(&priv->mutex);
2657
2658         iwl3945_cancel_deferred_work(priv);
2659 }
2660
2661 #define MAX_HW_RESTARTS 5
2662
2663 static int __iwl3945_up(struct iwl_priv *priv)
2664 {
2665         int rc, i;
2666
2667         rc = iwl_alloc_bcast_station(priv, &priv->contexts[IWL_RXON_CTX_BSS],
2668                                      false);
2669         if (rc)
2670                 return rc;
2671
2672         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2673                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2674                 return -EIO;
2675         }
2676
2677         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2678                 IWL_ERR(priv, "ucode not available for device bring up\n");
2679                 return -EIO;
2680         }
2681
2682         /* If platform's RF_KILL switch is NOT set to KILL */
2683         if (iwl_read32(priv, CSR_GP_CNTRL) &
2684                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2685                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2686         else {
2687                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2688                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2689                 return -ENODEV;
2690         }
2691
2692         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2693
2694         rc = iwl3945_hw_nic_init(priv);
2695         if (rc) {
2696                 IWL_ERR(priv, "Unable to int nic\n");
2697                 return rc;
2698         }
2699
2700         /* make sure rfkill handshake bits are cleared */
2701         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2702         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2703                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2704
2705         /* clear (again), then enable host interrupts */
2706         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2707         iwl_enable_interrupts(priv);
2708
2709         /* really make sure rfkill handshake bits are cleared */
2710         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2711         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2712
2713         /* Copy original ucode data image from disk into backup cache.
2714          * This will be used to initialize the on-board processor's
2715          * data SRAM for a clean start when the runtime program first loads. */
2716         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2717                priv->ucode_data.len);
2718
2719         /* We return success when we resume from suspend and rf_kill is on. */
2720         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2721                 return 0;
2722
2723         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2724
2725                 /* load bootstrap state machine,
2726                  * load bootstrap program into processor's memory,
2727                  * prepare to load the "initialize" uCode */
2728                 rc = priv->cfg->ops->lib->load_ucode(priv);
2729
2730                 if (rc) {
2731                         IWL_ERR(priv,
2732                                 "Unable to set up bootstrap uCode: %d\n", rc);
2733                         continue;
2734                 }
2735
2736                 /* start card; "initialize" will load runtime ucode */
2737                 iwl3945_nic_start(priv);
2738
2739                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2740
2741                 return 0;
2742         }
2743
2744         set_bit(STATUS_EXIT_PENDING, &priv->status);
2745         __iwl3945_down(priv);
2746         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2747
2748         /* tried to restart and config the device for as long as our
2749          * patience could withstand */
2750         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2751         return -EIO;
2752 }
2753
2754
2755 /*****************************************************************************
2756  *
2757  * Workqueue callbacks
2758  *
2759  *****************************************************************************/
2760
2761 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2762 {
2763         struct iwl_priv *priv =
2764             container_of(data, struct iwl_priv, init_alive_start.work);
2765
2766         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2767                 return;
2768
2769         mutex_lock(&priv->mutex);
2770         iwl3945_init_alive_start(priv);
2771         mutex_unlock(&priv->mutex);
2772 }
2773
2774 static void iwl3945_bg_alive_start(struct work_struct *data)
2775 {
2776         struct iwl_priv *priv =
2777             container_of(data, struct iwl_priv, alive_start.work);
2778
2779         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2780                 return;
2781
2782         mutex_lock(&priv->mutex);
2783         iwl3945_alive_start(priv);
2784         mutex_unlock(&priv->mutex);
2785 }
2786
2787 /*
2788  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2789  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2790  * *is* readable even when device has been SW_RESET into low power mode
2791  * (e.g. during RF KILL).
2792  */
2793 static void iwl3945_rfkill_poll(struct work_struct *data)
2794 {
2795         struct iwl_priv *priv =
2796             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2797         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2798         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2799                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2800
2801         if (new_rfkill != old_rfkill) {
2802                 if (new_rfkill)
2803                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2804                 else
2805                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2806
2807                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2808
2809                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2810                                 new_rfkill ? "disable radio" : "enable radio");
2811         }
2812
2813         /* Keep this running, even if radio now enabled.  This will be
2814          * cancelled in mac_start() if system decides to start again */
2815         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2816                            round_jiffies_relative(2 * HZ));
2817
2818 }
2819
2820 int iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2821 {
2822         struct iwl_host_cmd cmd = {
2823                 .id = REPLY_SCAN_CMD,
2824                 .len = sizeof(struct iwl3945_scan_cmd),
2825                 .flags = CMD_SIZE_HUGE,
2826         };
2827         struct iwl3945_scan_cmd *scan;
2828         u8 n_probes = 0;
2829         enum ieee80211_band band;
2830         bool is_active = false;
2831         int ret;
2832
2833         lockdep_assert_held(&priv->mutex);
2834
2835         if (!priv->scan_cmd) {
2836                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2837                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2838                 if (!priv->scan_cmd) {
2839                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2840                         return -ENOMEM;
2841                 }
2842         }
2843         scan = priv->scan_cmd;
2844         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2845
2846         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2847         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2848
2849         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS)) {
2850                 u16 interval = 0;
2851                 u32 extra;
2852                 u32 suspend_time = 100;
2853                 u32 scan_suspend_time = 100;
2854                 unsigned long flags;
2855
2856                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2857
2858                 spin_lock_irqsave(&priv->lock, flags);
2859                 if (priv->is_internal_short_scan)
2860                         interval = 0;
2861                 else
2862                         interval = vif->bss_conf.beacon_int;
2863                 spin_unlock_irqrestore(&priv->lock, flags);
2864
2865                 scan->suspend_time = 0;
2866                 scan->max_out_time = cpu_to_le32(200 * 1024);
2867                 if (!interval)
2868                         interval = suspend_time;
2869                 /*
2870                  * suspend time format:
2871                  *  0-19: beacon interval in usec (time before exec.)
2872                  * 20-23: 0
2873                  * 24-31: number of beacons (suspend between channels)
2874                  */
2875
2876                 extra = (suspend_time / interval) << 24;
2877                 scan_suspend_time = 0xFF0FFFFF &
2878                     (extra | ((suspend_time % interval) * 1024));
2879
2880                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2881                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2882                                scan_suspend_time, interval);
2883         }
2884
2885         if (priv->is_internal_short_scan) {
2886                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2887         } else if (priv->scan_request->n_ssids) {
2888                 int i, p = 0;
2889                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2890                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2891                         /* always does wildcard anyway */
2892                         if (!priv->scan_request->ssids[i].ssid_len)
2893                                 continue;
2894                         scan->direct_scan[p].id = WLAN_EID_SSID;
2895                         scan->direct_scan[p].len =
2896                                 priv->scan_request->ssids[i].ssid_len;
2897                         memcpy(scan->direct_scan[p].ssid,
2898                                priv->scan_request->ssids[i].ssid,
2899                                priv->scan_request->ssids[i].ssid_len);
2900                         n_probes++;
2901                         p++;
2902                 }
2903                 is_active = true;
2904         } else
2905                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2906
2907         /* We don't build a direct scan probe request; the uCode will do
2908          * that based on the direct_mask added to each channel entry */
2909         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2910         scan->tx_cmd.sta_id = priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
2911         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2912
2913         /* flags + rate selection */
2914
2915         switch (priv->scan_band) {
2916         case IEEE80211_BAND_2GHZ:
2917                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2918                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2919                 scan->good_CRC_th = 0;
2920                 band = IEEE80211_BAND_2GHZ;
2921                 break;
2922         case IEEE80211_BAND_5GHZ:
2923                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2924                 /*
2925                  * If active scaning is requested but a certain channel
2926                  * is marked passive, we can do active scanning if we
2927                  * detect transmissions.
2928                  */
2929                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2930                                                 IWL_GOOD_CRC_TH_DISABLED;
2931                 band = IEEE80211_BAND_5GHZ;
2932                 break;
2933         default:
2934                 IWL_WARN(priv, "Invalid scan band\n");
2935                 return -EIO;
2936         }
2937
2938         if (!priv->is_internal_short_scan) {
2939                 scan->tx_cmd.len = cpu_to_le16(
2940                         iwl_fill_probe_req(priv,
2941                                 (struct ieee80211_mgmt *)scan->data,
2942                                 vif->addr,
2943                                 priv->scan_request->ie,
2944                                 priv->scan_request->ie_len,
2945                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2946         } else {
2947                 /* use bcast addr, will not be transmitted but must be valid */
2948                 scan->tx_cmd.len = cpu_to_le16(
2949                         iwl_fill_probe_req(priv,
2950                                 (struct ieee80211_mgmt *)scan->data,
2951                                 iwl_bcast_addr, NULL, 0,
2952                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2953         }
2954         /* select Rx antennas */
2955         scan->flags |= iwl3945_get_antenna_flags(priv);
2956
2957         if (priv->is_internal_short_scan) {
2958                 scan->channel_count =
2959                         iwl3945_get_single_channel_for_scan(priv, vif, band,
2960                                 (void *)&scan->data[le16_to_cpu(
2961                                 scan->tx_cmd.len)]);
2962         } else {
2963                 scan->channel_count =
2964                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2965                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2966         }
2967
2968         if (scan->channel_count == 0) {
2969                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2970                 return -EIO;
2971         }
2972
2973         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2974             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2975         cmd.data = scan;
2976         scan->len = cpu_to_le16(cmd.len);
2977
2978         set_bit(STATUS_SCAN_HW, &priv->status);
2979         ret = iwl_send_cmd_sync(priv, &cmd);
2980         if (ret)
2981                 clear_bit(STATUS_SCAN_HW, &priv->status);
2982         return ret;
2983 }
2984
2985 static void iwl3945_bg_restart(struct work_struct *data)
2986 {
2987         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2988
2989         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2990                 return;
2991
2992         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2993                 struct iwl_rxon_context *ctx;
2994                 mutex_lock(&priv->mutex);
2995                 for_each_context(priv, ctx)
2996                         ctx->vif = NULL;
2997                 priv->is_open = 0;
2998                 mutex_unlock(&priv->mutex);
2999                 iwl3945_down(priv);
3000                 ieee80211_restart_hw(priv->hw);
3001         } else {
3002                 iwl3945_down(priv);
3003
3004                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3005                         return;
3006
3007                 mutex_lock(&priv->mutex);
3008                 __iwl3945_up(priv);
3009                 mutex_unlock(&priv->mutex);
3010         }
3011 }
3012
3013 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3014 {
3015         struct iwl_priv *priv =
3016             container_of(data, struct iwl_priv, rx_replenish);
3017
3018         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3019                 return;
3020
3021         mutex_lock(&priv->mutex);
3022         iwl3945_rx_replenish(priv);
3023         mutex_unlock(&priv->mutex);
3024 }
3025
3026 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3027 {
3028         int rc = 0;
3029         struct ieee80211_conf *conf = NULL;
3030         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3031
3032         if (!vif || !priv->is_open)
3033                 return;
3034
3035         if (vif->type == NL80211_IFTYPE_AP) {
3036                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3037                 return;
3038         }
3039
3040         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3041                         vif->bss_conf.aid, ctx->active.bssid_addr);
3042
3043         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3044                 return;
3045
3046         iwl_scan_cancel_timeout(priv, 200);
3047
3048         conf = ieee80211_get_hw_conf(priv->hw);
3049
3050         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3051         iwlcore_commit_rxon(priv, ctx);
3052
3053         rc = iwl_send_rxon_timing(priv, ctx);
3054         if (rc)
3055                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3056                             "Attempting to continue.\n");
3057
3058         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3059
3060         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3061
3062         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3063                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3064
3065         if (vif->bss_conf.use_short_preamble)
3066                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3067         else
3068                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3069
3070         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3071                 if (vif->bss_conf.use_short_slot)
3072                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3073                 else
3074                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3075         }
3076
3077         iwlcore_commit_rxon(priv, ctx);
3078
3079         switch (vif->type) {
3080         case NL80211_IFTYPE_STATION:
3081                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3082                 break;
3083         case NL80211_IFTYPE_ADHOC:
3084                 iwl3945_send_beacon_cmd(priv);
3085                 break;
3086         default:
3087                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3088                         __func__, vif->type);
3089                 break;
3090         }
3091 }
3092
3093 /*****************************************************************************
3094  *
3095  * mac80211 entry point functions
3096  *
3097  *****************************************************************************/
3098
3099 #define UCODE_READY_TIMEOUT     (2 * HZ)
3100
3101 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3102 {
3103         struct iwl_priv *priv = hw->priv;
3104         int ret;
3105
3106         IWL_DEBUG_MAC80211(priv, "enter\n");
3107
3108         /* we should be verifying the device is ready to be opened */
3109         mutex_lock(&priv->mutex);
3110
3111         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3112          * ucode filename and max sizes are card-specific. */
3113
3114         if (!priv->ucode_code.len) {
3115                 ret = iwl3945_read_ucode(priv);
3116                 if (ret) {
3117                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3118                         mutex_unlock(&priv->mutex);
3119                         goto out_release_irq;
3120                 }
3121         }
3122
3123         ret = __iwl3945_up(priv);
3124
3125         mutex_unlock(&priv->mutex);
3126
3127         if (ret)
3128                 goto out_release_irq;
3129
3130         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3131
3132         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3133          * mac80211 will not be run successfully. */
3134         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3135                         test_bit(STATUS_READY, &priv->status),
3136                         UCODE_READY_TIMEOUT);
3137         if (!ret) {
3138                 if (!test_bit(STATUS_READY, &priv->status)) {
3139                         IWL_ERR(priv,
3140                                 "Wait for START_ALIVE timeout after %dms.\n",
3141                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3142                         ret = -ETIMEDOUT;
3143                         goto out_release_irq;
3144                 }
3145         }
3146
3147         /* ucode is running and will send rfkill notifications,
3148          * no need to poll the killswitch state anymore */
3149         cancel_delayed_work(&priv->_3945.rfkill_poll);
3150
3151         iwl_led_start(priv);
3152
3153         priv->is_open = 1;
3154         IWL_DEBUG_MAC80211(priv, "leave\n");
3155         return 0;
3156
3157 out_release_irq:
3158         priv->is_open = 0;
3159         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3160         return ret;
3161 }
3162
3163 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3164 {
3165         struct iwl_priv *priv = hw->priv;
3166
3167         IWL_DEBUG_MAC80211(priv, "enter\n");
3168
3169         if (!priv->is_open) {
3170                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3171                 return;
3172         }
3173
3174         priv->is_open = 0;
3175
3176         iwl3945_down(priv);
3177
3178         flush_workqueue(priv->workqueue);
3179
3180         /* start polling the killswitch state again */
3181         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3182                            round_jiffies_relative(2 * HZ));
3183
3184         IWL_DEBUG_MAC80211(priv, "leave\n");
3185 }
3186
3187 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3188 {
3189         struct iwl_priv *priv = hw->priv;
3190
3191         IWL_DEBUG_MAC80211(priv, "enter\n");
3192
3193         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3194                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3195
3196         if (iwl3945_tx_skb(priv, skb))
3197                 dev_kfree_skb_any(skb);
3198
3199         IWL_DEBUG_MAC80211(priv, "leave\n");
3200         return NETDEV_TX_OK;
3201 }
3202
3203 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3204 {
3205         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3206         int rc = 0;
3207
3208         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3209                 return;
3210
3211         /* The following should be done only at AP bring up */
3212         if (!(iwl_is_associated(priv, IWL_RXON_CTX_BSS))) {
3213
3214                 /* RXON - unassoc (to set timing command) */
3215                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3216                 iwlcore_commit_rxon(priv, ctx);
3217
3218                 /* RXON Timing */
3219                 rc = iwl_send_rxon_timing(priv, ctx);
3220                 if (rc)
3221                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3222                                         "Attempting to continue.\n");
3223
3224                 ctx->staging.assoc_id = 0;
3225
3226                 if (vif->bss_conf.use_short_preamble)
3227                         ctx->staging.flags |=
3228                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3229                 else
3230                         ctx->staging.flags &=
3231                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3232
3233                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3234                         if (vif->bss_conf.use_short_slot)
3235                                 ctx->staging.flags |=
3236                                         RXON_FLG_SHORT_SLOT_MSK;
3237                         else
3238                                 ctx->staging.flags &=
3239                                         ~RXON_FLG_SHORT_SLOT_MSK;
3240                 }
3241                 /* restore RXON assoc */
3242                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3243                 iwlcore_commit_rxon(priv, ctx);
3244         }
3245         iwl3945_send_beacon_cmd(priv);
3246
3247         /* FIXME - we need to add code here to detect a totally new
3248          * configuration, reset the AP, unassoc, rxon timing, assoc,
3249          * clear sta table, add BCAST sta... */
3250 }
3251
3252 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3253                                struct ieee80211_vif *vif,
3254                                struct ieee80211_sta *sta,
3255                                struct ieee80211_key_conf *key)
3256 {
3257         struct iwl_priv *priv = hw->priv;
3258         int ret = 0;
3259         u8 sta_id = IWL_INVALID_STATION;
3260         u8 static_key;
3261
3262         IWL_DEBUG_MAC80211(priv, "enter\n");
3263
3264         if (iwl3945_mod_params.sw_crypto) {
3265                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3266                 return -EOPNOTSUPP;
3267         }
3268
3269         static_key = !iwl_is_associated(priv, IWL_RXON_CTX_BSS);
3270
3271         if (!static_key) {
3272                 sta_id = iwl_sta_id_or_broadcast(
3273                                 priv, &priv->contexts[IWL_RXON_CTX_BSS], sta);
3274                 if (sta_id == IWL_INVALID_STATION)
3275                         return -EINVAL;
3276         }
3277
3278         mutex_lock(&priv->mutex);
3279         iwl_scan_cancel_timeout(priv, 100);
3280
3281         switch (cmd) {
3282         case SET_KEY:
3283                 if (static_key)
3284                         ret = iwl3945_set_static_key(priv, key);
3285                 else
3286                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3287                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3288                 break;
3289         case DISABLE_KEY:
3290                 if (static_key)
3291                         ret = iwl3945_remove_static_key(priv);
3292                 else
3293                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3294                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3295                 break;
3296         default:
3297                 ret = -EINVAL;
3298         }
3299
3300         mutex_unlock(&priv->mutex);
3301         IWL_DEBUG_MAC80211(priv, "leave\n");
3302
3303         return ret;
3304 }
3305
3306 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3307                                struct ieee80211_vif *vif,
3308                                struct ieee80211_sta *sta)
3309 {
3310         struct iwl_priv *priv = hw->priv;
3311         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3312         int ret;
3313         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3314         u8 sta_id;
3315
3316         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3317                         sta->addr);
3318         mutex_lock(&priv->mutex);
3319         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
3320                         sta->addr);
3321         sta_priv->common.sta_id = IWL_INVALID_STATION;
3322
3323
3324         ret = iwl_add_station_common(priv, &priv->contexts[IWL_RXON_CTX_BSS],
3325                                      sta->addr, is_ap, sta, &sta_id);
3326         if (ret) {
3327                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3328                         sta->addr, ret);
3329                 /* Should we return success if return code is EEXIST ? */
3330                 mutex_unlock(&priv->mutex);
3331                 return ret;
3332         }
3333
3334         sta_priv->common.sta_id = sta_id;
3335
3336         /* Initialize rate scaling */
3337         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3338                        sta->addr);
3339         iwl3945_rs_rate_init(priv, sta, sta_id);
3340         mutex_unlock(&priv->mutex);
3341
3342         return 0;
3343 }
3344
3345 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
3346                                      unsigned int changed_flags,
3347                                      unsigned int *total_flags,
3348                                      u64 multicast)
3349 {
3350         struct iwl_priv *priv = hw->priv;
3351         __le32 filter_or = 0, filter_nand = 0;
3352         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3353
3354 #define CHK(test, flag) do { \
3355         if (*total_flags & (test))              \
3356                 filter_or |= (flag);            \
3357         else                                    \
3358                 filter_nand |= (flag);          \
3359         } while (0)
3360
3361         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3362                         changed_flags, *total_flags);
3363
3364         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3365         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3366         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3367
3368 #undef CHK
3369
3370         mutex_lock(&priv->mutex);
3371
3372         ctx->staging.filter_flags &= ~filter_nand;
3373         ctx->staging.filter_flags |= filter_or;
3374
3375         /*
3376          * Committing directly here breaks for some reason,
3377          * but we'll eventually commit the filter flags
3378          * change anyway.
3379          */
3380
3381         mutex_unlock(&priv->mutex);
3382
3383         /*
3384          * Receiving all multicast frames is always enabled by the
3385          * default flags setup in iwl_connection_init_rx_config()
3386          * since we currently do not support programming multicast
3387          * filters into the device.
3388          */
3389         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3390                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3391 }
3392
3393
3394 /*****************************************************************************
3395  *
3396  * sysfs attributes
3397  *
3398  *****************************************************************************/
3399
3400 #ifdef CONFIG_IWLWIFI_DEBUG
3401
3402 /*
3403  * The following adds a new attribute to the sysfs representation
3404  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3405  * used for controlling the debug level.
3406  *
3407  * See the level definitions in iwl for details.
3408  *
3409  * The debug_level being managed using sysfs below is a per device debug
3410  * level that is used instead of the global debug level if it (the per
3411  * device debug level) is set.
3412  */
3413 static ssize_t show_debug_level(struct device *d,
3414                                 struct device_attribute *attr, char *buf)
3415 {
3416         struct iwl_priv *priv = dev_get_drvdata(d);
3417         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3418 }
3419 static ssize_t store_debug_level(struct device *d,
3420                                 struct device_attribute *attr,
3421                                  const char *buf, size_t count)
3422 {
3423         struct iwl_priv *priv = dev_get_drvdata(d);
3424         unsigned long val;
3425         int ret;
3426
3427         ret = strict_strtoul(buf, 0, &val);
3428         if (ret)
3429                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3430         else {
3431                 priv->debug_level = val;
3432                 if (iwl_alloc_traffic_mem(priv))
3433                         IWL_ERR(priv,
3434                                 "Not enough memory to generate traffic log\n");
3435         }
3436         return strnlen(buf, count);
3437 }
3438
3439 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3440                         show_debug_level, store_debug_level);
3441
3442 #endif /* CONFIG_IWLWIFI_DEBUG */
3443
3444 static ssize_t show_temperature(struct device *d,
3445                                 struct device_attribute *attr, char *buf)
3446 {
3447         struct iwl_priv *priv = dev_get_drvdata(d);
3448
3449         if (!iwl_is_alive(priv))
3450                 return -EAGAIN;
3451
3452         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3453 }
3454
3455 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3456
3457 static ssize_t show_tx_power(struct device *d,
3458                              struct device_attribute *attr, char *buf)
3459 {
3460         struct iwl_priv *priv = dev_get_drvdata(d);
3461         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3462 }
3463
3464 static ssize_t store_tx_power(struct device *d,
3465                               struct device_attribute *attr,
3466                               const char *buf, size_t count)
3467 {
3468         struct iwl_priv *priv = dev_get_drvdata(d);
3469         char *p = (char *)buf;
3470         u32 val;
3471
3472         val = simple_strtoul(p, &p, 10);
3473         if (p == buf)
3474                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3475         else
3476                 iwl3945_hw_reg_set_txpower(priv, val);
3477
3478         return count;
3479 }
3480
3481 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3482
3483 static ssize_t show_flags(struct device *d,
3484                           struct device_attribute *attr, char *buf)
3485 {
3486         struct iwl_priv *priv = dev_get_drvdata(d);
3487         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3488
3489         return sprintf(buf, "0x%04X\n", ctx->active.flags);
3490 }
3491
3492 static ssize_t store_flags(struct device *d,
3493                            struct device_attribute *attr,
3494                            const char *buf, size_t count)
3495 {
3496         struct iwl_priv *priv = dev_get_drvdata(d);
3497         u32 flags = simple_strtoul(buf, NULL, 0);
3498         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3499
3500         mutex_lock(&priv->mutex);
3501         if (le32_to_cpu(ctx->staging.flags) != flags) {
3502                 /* Cancel any currently running scans... */
3503                 if (iwl_scan_cancel_timeout(priv, 100))
3504                         IWL_WARN(priv, "Could not cancel scan.\n");
3505                 else {
3506                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3507                                        flags);
3508                         ctx->staging.flags = cpu_to_le32(flags);
3509                         iwlcore_commit_rxon(priv, ctx);
3510                 }
3511         }
3512         mutex_unlock(&priv->mutex);
3513
3514         return count;
3515 }
3516
3517 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3518
3519 static ssize_t show_filter_flags(struct device *d,
3520                                  struct device_attribute *attr, char *buf)
3521 {
3522         struct iwl_priv *priv = dev_get_drvdata(d);
3523         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3524
3525         return sprintf(buf, "0x%04X\n",
3526                 le32_to_cpu(ctx->active.filter_flags));
3527 }
3528
3529 static ssize_t store_filter_flags(struct device *d,
3530                                   struct device_attribute *attr,
3531                                   const char *buf, size_t count)
3532 {
3533         struct iwl_priv *priv = dev_get_drvdata(d);
3534         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3535         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3536
3537         mutex_lock(&priv->mutex);
3538         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3539                 /* Cancel any currently running scans... */
3540                 if (iwl_scan_cancel_timeout(priv, 100))
3541                         IWL_WARN(priv, "Could not cancel scan.\n");
3542                 else {
3543                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3544                                        "0x%04X\n", filter_flags);
3545                         ctx->staging.filter_flags =
3546                                 cpu_to_le32(filter_flags);
3547                         iwlcore_commit_rxon(priv, ctx);
3548                 }
3549         }
3550         mutex_unlock(&priv->mutex);
3551
3552         return count;
3553 }
3554
3555 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3556                    store_filter_flags);
3557
3558 static ssize_t show_measurement(struct device *d,
3559                                 struct device_attribute *attr, char *buf)
3560 {
3561         struct iwl_priv *priv = dev_get_drvdata(d);
3562         struct iwl_spectrum_notification measure_report;
3563         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3564         u8 *data = (u8 *)&measure_report;
3565         unsigned long flags;
3566
3567         spin_lock_irqsave(&priv->lock, flags);
3568         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3569                 spin_unlock_irqrestore(&priv->lock, flags);
3570                 return 0;
3571         }
3572         memcpy(&measure_report, &priv->measure_report, size);
3573         priv->measurement_status = 0;
3574         spin_unlock_irqrestore(&priv->lock, flags);
3575
3576         while (size && (PAGE_SIZE - len)) {
3577                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3578                                    PAGE_SIZE - len, 1);
3579                 len = strlen(buf);
3580                 if (PAGE_SIZE - len)
3581                         buf[len++] = '\n';
3582
3583                 ofs += 16;
3584                 size -= min(size, 16U);
3585         }
3586
3587         return len;
3588 }
3589
3590 static ssize_t store_measurement(struct device *d,
3591                                  struct device_attribute *attr,
3592                                  const char *buf, size_t count)
3593 {
3594         struct iwl_priv *priv = dev_get_drvdata(d);
3595         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3596         struct ieee80211_measurement_params params = {
3597                 .channel = le16_to_cpu(ctx->active.channel),
3598                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3599                 .duration = cpu_to_le16(1),
3600         };
3601         u8 type = IWL_MEASURE_BASIC;
3602         u8 buffer[32];
3603         u8 channel;
3604
3605         if (count) {
3606                 char *p = buffer;
3607                 strncpy(buffer, buf, min(sizeof(buffer), count));
3608                 channel = simple_strtoul(p, NULL, 0);
3609                 if (channel)
3610                         params.channel = channel;
3611
3612                 p = buffer;
3613                 while (*p && *p != ' ')
3614                         p++;
3615                 if (*p)
3616                         type = simple_strtoul(p + 1, NULL, 0);
3617         }
3618
3619         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3620                        "channel %d (for '%s')\n", type, params.channel, buf);
3621         iwl3945_get_measurement(priv, &params, type);
3622
3623         return count;
3624 }
3625
3626 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3627                    show_measurement, store_measurement);
3628
3629 static ssize_t store_retry_rate(struct device *d,
3630                                 struct device_attribute *attr,
3631                                 const char *buf, size_t count)
3632 {
3633         struct iwl_priv *priv = dev_get_drvdata(d);
3634
3635         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3636         if (priv->retry_rate <= 0)
3637                 priv->retry_rate = 1;
3638
3639         return count;
3640 }
3641
3642 static ssize_t show_retry_rate(struct device *d,
3643                                struct device_attribute *attr, char *buf)
3644 {
3645         struct iwl_priv *priv = dev_get_drvdata(d);
3646         return sprintf(buf, "%d", priv->retry_rate);
3647 }
3648
3649 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3650                    store_retry_rate);
3651
3652
3653 static ssize_t show_channels(struct device *d,
3654                              struct device_attribute *attr, char *buf)
3655 {
3656         /* all this shit doesn't belong into sysfs anyway */
3657         return 0;
3658 }
3659
3660 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3661
3662 static ssize_t show_antenna(struct device *d,
3663                             struct device_attribute *attr, char *buf)
3664 {
3665         struct iwl_priv *priv = dev_get_drvdata(d);
3666
3667         if (!iwl_is_alive(priv))
3668                 return -EAGAIN;
3669
3670         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3671 }
3672
3673 static ssize_t store_antenna(struct device *d,
3674                              struct device_attribute *attr,
3675                              const char *buf, size_t count)
3676 {
3677         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3678         int ant;
3679
3680         if (count == 0)
3681                 return 0;
3682
3683         if (sscanf(buf, "%1i", &ant) != 1) {
3684                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3685                 return count;
3686         }
3687
3688         if ((ant >= 0) && (ant <= 2)) {
3689                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3690                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3691         } else
3692                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3693
3694
3695         return count;
3696 }
3697
3698 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3699
3700 static ssize_t show_status(struct device *d,
3701                            struct device_attribute *attr, char *buf)
3702 {
3703         struct iwl_priv *priv = dev_get_drvdata(d);
3704         if (!iwl_is_alive(priv))
3705                 return -EAGAIN;
3706         return sprintf(buf, "0x%08x\n", (int)priv->status);
3707 }
3708
3709 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3710
3711 static ssize_t dump_error_log(struct device *d,
3712                               struct device_attribute *attr,
3713                               const char *buf, size_t count)
3714 {
3715         struct iwl_priv *priv = dev_get_drvdata(d);
3716         char *p = (char *)buf;
3717
3718         if (p[0] == '1')
3719                 iwl3945_dump_nic_error_log(priv);
3720
3721         return strnlen(buf, count);
3722 }
3723
3724 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3725
3726 /*****************************************************************************
3727  *
3728  * driver setup and tear down
3729  *
3730  *****************************************************************************/
3731
3732 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3733 {
3734         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3735
3736         init_waitqueue_head(&priv->wait_command_queue);
3737
3738         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3739         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3740         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3741         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3742         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3743         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3744
3745         iwl_setup_scan_deferred_work(priv);
3746
3747         iwl3945_hw_setup_deferred_work(priv);
3748
3749         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3750                 init_timer(&priv->monitor_recover);
3751                 priv->monitor_recover.data = (unsigned long)priv;
3752                 priv->monitor_recover.function =
3753                         priv->cfg->ops->lib->recover_from_tx_stall;
3754         }
3755
3756         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3757                      iwl3945_irq_tasklet, (unsigned long)priv);
3758 }
3759
3760 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3761 {
3762         iwl3945_hw_cancel_deferred_work(priv);
3763
3764         cancel_delayed_work_sync(&priv->init_alive_start);
3765         cancel_delayed_work(&priv->alive_start);
3766         cancel_work_sync(&priv->beacon_update);
3767
3768         iwl_cancel_scan_deferred_work(priv);
3769 }
3770
3771 static struct attribute *iwl3945_sysfs_entries[] = {
3772         &dev_attr_antenna.attr,
3773         &dev_attr_channels.attr,
3774         &dev_attr_dump_errors.attr,
3775         &dev_attr_flags.attr,
3776         &dev_attr_filter_flags.attr,
3777         &dev_attr_measurement.attr,
3778         &dev_attr_retry_rate.attr,
3779         &dev_attr_status.attr,
3780         &dev_attr_temperature.attr,
3781         &dev_attr_tx_power.attr,
3782 #ifdef CONFIG_IWLWIFI_DEBUG
3783         &dev_attr_debug_level.attr,
3784 #endif
3785         NULL
3786 };
3787
3788 static struct attribute_group iwl3945_attribute_group = {
3789         .name = NULL,           /* put in device directory */
3790         .attrs = iwl3945_sysfs_entries,
3791 };
3792
3793 static struct ieee80211_ops iwl3945_hw_ops = {
3794         .tx = iwl3945_mac_tx,
3795         .start = iwl3945_mac_start,
3796         .stop = iwl3945_mac_stop,
3797         .add_interface = iwl_mac_add_interface,
3798         .remove_interface = iwl_mac_remove_interface,
3799         .config = iwl_mac_config,
3800         .configure_filter = iwl3945_configure_filter,
3801         .set_key = iwl3945_mac_set_key,
3802         .conf_tx = iwl_mac_conf_tx,
3803         .reset_tsf = iwl_mac_reset_tsf,
3804         .bss_info_changed = iwl_bss_info_changed,
3805         .hw_scan = iwl_mac_hw_scan,
3806         .sta_add = iwl3945_mac_sta_add,
3807         .sta_remove = iwl_mac_sta_remove,
3808         .tx_last_beacon = iwl_mac_tx_last_beacon,
3809 };
3810
3811 static int iwl3945_init_drv(struct iwl_priv *priv)
3812 {
3813         int ret;
3814         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3815
3816         priv->retry_rate = 1;
3817         priv->ibss_beacon = NULL;
3818
3819         spin_lock_init(&priv->sta_lock);
3820         spin_lock_init(&priv->hcmd_lock);
3821
3822         INIT_LIST_HEAD(&priv->free_frames);
3823
3824         mutex_init(&priv->mutex);
3825         mutex_init(&priv->sync_cmd_mutex);
3826
3827         priv->ieee_channels = NULL;
3828         priv->ieee_rates = NULL;
3829         priv->band = IEEE80211_BAND_2GHZ;
3830
3831         priv->iw_mode = NL80211_IFTYPE_STATION;
3832         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3833
3834         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3835
3836         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3837                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3838                          eeprom->version);
3839                 ret = -EINVAL;
3840                 goto err;
3841         }
3842         ret = iwl_init_channel_map(priv);
3843         if (ret) {
3844                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3845                 goto err;
3846         }
3847
3848         /* Set up txpower settings in driver for all channels */
3849         if (iwl3945_txpower_set_from_eeprom(priv)) {
3850                 ret = -EIO;
3851                 goto err_free_channel_map;
3852         }
3853
3854         ret = iwlcore_init_geos(priv);
3855         if (ret) {
3856                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3857                 goto err_free_channel_map;
3858         }
3859         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3860
3861         return 0;
3862
3863 err_free_channel_map:
3864         iwl_free_channel_map(priv);
3865 err:
3866         return ret;
3867 }
3868
3869 #define IWL3945_MAX_PROBE_REQUEST       200
3870
3871 static int iwl3945_setup_mac(struct iwl_priv *priv)
3872 {
3873         int ret;
3874         struct ieee80211_hw *hw = priv->hw;
3875
3876         hw->rate_control_algorithm = "iwl-3945-rs";
3877         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3878         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3879
3880         /* Tell mac80211 our characteristics */
3881         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3882                     IEEE80211_HW_SPECTRUM_MGMT;
3883
3884         if (!priv->cfg->broken_powersave)
3885                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3886                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3887
3888         hw->wiphy->interface_modes =
3889                 priv->contexts[IWL_RXON_CTX_BSS].interface_modes;
3890
3891         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3892                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3893
3894         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3895         /* we create the 802.11 header and a zero-length SSID element */
3896         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3897
3898         /* Default value; 4 EDCA QOS priorities */
3899         hw->queues = 4;
3900
3901         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3902                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3903                         &priv->bands[IEEE80211_BAND_2GHZ];
3904
3905         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3906                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3907                         &priv->bands[IEEE80211_BAND_5GHZ];
3908
3909         ret = ieee80211_register_hw(priv->hw);
3910         if (ret) {
3911                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3912                 return ret;
3913         }
3914         priv->mac80211_registered = 1;
3915
3916         return 0;
3917 }
3918
3919 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3920 {
3921         int err = 0, i;
3922         struct iwl_priv *priv;
3923         struct ieee80211_hw *hw;
3924         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3925         struct iwl3945_eeprom *eeprom;
3926         unsigned long flags;
3927
3928         /***********************
3929          * 1. Allocating HW data
3930          * ********************/
3931
3932         /* mac80211 allocates memory for this device instance, including
3933          *   space for this driver's private structure */
3934         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3935         if (hw == NULL) {
3936                 pr_err("Can not allocate network device\n");
3937                 err = -ENOMEM;
3938                 goto out;
3939         }
3940         priv = hw->priv;
3941         SET_IEEE80211_DEV(hw, &pdev->dev);
3942
3943         priv->cmd_queue = IWL39_CMD_QUEUE_NUM;
3944
3945         /* 3945 has only one valid context */
3946         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3947
3948         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3949                 priv->contexts[i].ctxid = i;
3950
3951         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3952         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3953         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3954         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3955         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3956         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3957         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3958                 BIT(NL80211_IFTYPE_STATION) |
3959                 BIT(NL80211_IFTYPE_ADHOC);
3960         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3961         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3962         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3963
3964         /*
3965          * Disabling hardware scan means that mac80211 will perform scans
3966          * "the hard way", rather than using device's scan.
3967          */
3968         if (iwl3945_mod_params.disable_hw_scan) {
3969                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3970                 iwl3945_hw_ops.hw_scan = NULL;
3971         }
3972
3973
3974         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3975         priv->cfg = cfg;
3976         priv->pci_dev = pdev;
3977         priv->inta_mask = CSR_INI_SET_MASK;
3978
3979         if (iwl_alloc_traffic_mem(priv))
3980                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3981
3982         /***************************
3983          * 2. Initializing PCI bus
3984          * *************************/
3985         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3986                                 PCIE_LINK_STATE_CLKPM);
3987
3988         if (pci_enable_device(pdev)) {
3989                 err = -ENODEV;
3990                 goto out_ieee80211_free_hw;
3991         }
3992
3993         pci_set_master(pdev);
3994
3995         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3996         if (!err)
3997                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3998         if (err) {
3999                 IWL_WARN(priv, "No suitable DMA available.\n");
4000                 goto out_pci_disable_device;
4001         }
4002
4003         pci_set_drvdata(pdev, priv);
4004         err = pci_request_regions(pdev, DRV_NAME);
4005         if (err)
4006                 goto out_pci_disable_device;
4007
4008         /***********************
4009          * 3. Read REV Register
4010          * ********************/
4011         priv->hw_base = pci_iomap(pdev, 0, 0);
4012         if (!priv->hw_base) {
4013                 err = -ENODEV;
4014                 goto out_pci_release_regions;
4015         }
4016
4017         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4018                         (unsigned long long) pci_resource_len(pdev, 0));
4019         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4020
4021         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4022          * PCI Tx retries from interfering with C3 CPU state */
4023         pci_write_config_byte(pdev, 0x41, 0x00);
4024
4025         /* these spin locks will be used in apm_ops.init and EEPROM access
4026          * we should init now
4027          */
4028         spin_lock_init(&priv->reg_lock);
4029         spin_lock_init(&priv->lock);
4030
4031         /*
4032          * stop and reset the on-board processor just in case it is in a
4033          * strange state ... like being left stranded by a primary kernel
4034          * and this is now the kdump kernel trying to start up
4035          */
4036         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4037
4038         /***********************
4039          * 4. Read EEPROM
4040          * ********************/
4041
4042         /* Read the EEPROM */
4043         err = iwl_eeprom_init(priv);
4044         if (err) {
4045                 IWL_ERR(priv, "Unable to init EEPROM\n");
4046                 goto out_iounmap;
4047         }
4048         /* MAC Address location in EEPROM same for 3945/4965 */
4049         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4050         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
4051         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
4052
4053         /***********************
4054          * 5. Setup HW Constants
4055          * ********************/
4056         /* Device-specific setup */
4057         if (iwl3945_hw_set_hw_params(priv)) {
4058                 IWL_ERR(priv, "failed to set hw settings\n");
4059                 goto out_eeprom_free;
4060         }
4061
4062         /***********************
4063          * 6. Setup priv
4064          * ********************/
4065
4066         err = iwl3945_init_drv(priv);
4067         if (err) {
4068                 IWL_ERR(priv, "initializing driver failed\n");
4069                 goto out_unset_hw_params;
4070         }
4071
4072         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4073                 priv->cfg->name);
4074
4075         /***********************
4076          * 7. Setup Services
4077          * ********************/
4078
4079         spin_lock_irqsave(&priv->lock, flags);
4080         iwl_disable_interrupts(priv);
4081         spin_unlock_irqrestore(&priv->lock, flags);
4082
4083         pci_enable_msi(priv->pci_dev);
4084
4085         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4086                           IRQF_SHARED, DRV_NAME, priv);
4087         if (err) {
4088                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4089                 goto out_disable_msi;
4090         }
4091
4092         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4093         if (err) {
4094                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4095                 goto out_release_irq;
4096         }
4097
4098         iwl_set_rxon_channel(priv,
4099                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5],
4100                              &priv->contexts[IWL_RXON_CTX_BSS]);
4101         iwl3945_setup_deferred_work(priv);
4102         iwl3945_setup_rx_handlers(priv);
4103         iwl_power_initialize(priv);
4104
4105         /*********************************
4106          * 8. Setup and Register mac80211
4107          * *******************************/
4108
4109         iwl_enable_interrupts(priv);
4110
4111         err = iwl3945_setup_mac(priv);
4112         if (err)
4113                 goto  out_remove_sysfs;
4114
4115         err = iwl_dbgfs_register(priv, DRV_NAME);
4116         if (err)
4117                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4118
4119         /* Start monitoring the killswitch */
4120         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4121                            2 * HZ);
4122
4123         return 0;
4124
4125  out_remove_sysfs:
4126         destroy_workqueue(priv->workqueue);
4127         priv->workqueue = NULL;
4128         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4129  out_release_irq:
4130         free_irq(priv->pci_dev->irq, priv);
4131  out_disable_msi:
4132         pci_disable_msi(priv->pci_dev);
4133         iwlcore_free_geos(priv);
4134         iwl_free_channel_map(priv);
4135  out_unset_hw_params:
4136         iwl3945_unset_hw_params(priv);
4137  out_eeprom_free:
4138         iwl_eeprom_free(priv);
4139  out_iounmap:
4140         pci_iounmap(pdev, priv->hw_base);
4141  out_pci_release_regions:
4142         pci_release_regions(pdev);
4143  out_pci_disable_device:
4144         pci_set_drvdata(pdev, NULL);
4145         pci_disable_device(pdev);
4146  out_ieee80211_free_hw:
4147         iwl_free_traffic_mem(priv);
4148         ieee80211_free_hw(priv->hw);
4149  out:
4150         return err;
4151 }
4152
4153 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4154 {
4155         struct iwl_priv *priv = pci_get_drvdata(pdev);
4156         unsigned long flags;
4157
4158         if (!priv)
4159                 return;
4160
4161         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4162
4163         iwl_dbgfs_unregister(priv);
4164
4165         set_bit(STATUS_EXIT_PENDING, &priv->status);
4166
4167         if (priv->mac80211_registered) {
4168                 ieee80211_unregister_hw(priv->hw);
4169                 priv->mac80211_registered = 0;
4170         } else {
4171                 iwl3945_down(priv);
4172         }
4173
4174         /*
4175          * Make sure device is reset to low power before unloading driver.
4176          * This may be redundant with iwl_down(), but there are paths to
4177          * run iwl_down() without calling apm_ops.stop(), and there are
4178          * paths to avoid running iwl_down() at all before leaving driver.
4179          * This (inexpensive) call *makes sure* device is reset.
4180          */
4181         priv->cfg->ops->lib->apm_ops.stop(priv);
4182
4183         /* make sure we flush any pending irq or
4184          * tasklet for the driver
4185          */
4186         spin_lock_irqsave(&priv->lock, flags);
4187         iwl_disable_interrupts(priv);
4188         spin_unlock_irqrestore(&priv->lock, flags);
4189
4190         iwl_synchronize_irq(priv);
4191
4192         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4193
4194         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4195
4196         iwl3945_dealloc_ucode_pci(priv);
4197
4198         if (priv->rxq.bd)
4199                 iwl3945_rx_queue_free(priv, &priv->rxq);
4200         iwl3945_hw_txq_ctx_free(priv);
4201
4202         iwl3945_unset_hw_params(priv);
4203
4204         /*netif_stop_queue(dev); */
4205         flush_workqueue(priv->workqueue);
4206
4207         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4208          * priv->workqueue... so we can't take down the workqueue
4209          * until now... */
4210         destroy_workqueue(priv->workqueue);
4211         priv->workqueue = NULL;
4212         iwl_free_traffic_mem(priv);
4213
4214         free_irq(pdev->irq, priv);
4215         pci_disable_msi(pdev);
4216
4217         pci_iounmap(pdev, priv->hw_base);
4218         pci_release_regions(pdev);
4219         pci_disable_device(pdev);
4220         pci_set_drvdata(pdev, NULL);
4221
4222         iwl_free_channel_map(priv);
4223         iwlcore_free_geos(priv);
4224         kfree(priv->scan_cmd);
4225         if (priv->ibss_beacon)
4226                 dev_kfree_skb(priv->ibss_beacon);
4227
4228         ieee80211_free_hw(priv->hw);
4229 }
4230
4231
4232 /*****************************************************************************
4233  *
4234  * driver and module entry point
4235  *
4236  *****************************************************************************/
4237
4238 static struct pci_driver iwl3945_driver = {
4239         .name = DRV_NAME,
4240         .id_table = iwl3945_hw_card_ids,
4241         .probe = iwl3945_pci_probe,
4242         .remove = __devexit_p(iwl3945_pci_remove),
4243 #ifdef CONFIG_PM
4244         .suspend = iwl_pci_suspend,
4245         .resume = iwl_pci_resume,
4246 #endif
4247 };
4248
4249 static int __init iwl3945_init(void)
4250 {
4251
4252         int ret;
4253         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
4254         pr_info(DRV_COPYRIGHT "\n");
4255
4256         ret = iwl3945_rate_control_register();
4257         if (ret) {
4258                 pr_err("Unable to register rate control algorithm: %d\n", ret);
4259                 return ret;
4260         }
4261
4262         ret = pci_register_driver(&iwl3945_driver);
4263         if (ret) {
4264                 pr_err("Unable to initialize PCI module\n");
4265                 goto error_register;
4266         }
4267
4268         return ret;
4269
4270 error_register:
4271         iwl3945_rate_control_unregister();
4272         return ret;
4273 }
4274
4275 static void __exit iwl3945_exit(void)
4276 {
4277         pci_unregister_driver(&iwl3945_driver);
4278         iwl3945_rate_control_unregister();
4279 }
4280
4281 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4282
4283 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4284 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4285 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4286 MODULE_PARM_DESC(swcrypto,
4287                  "using software crypto (default 1 [software])\n");
4288 #ifdef CONFIG_IWLWIFI_DEBUG
4289 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4290 MODULE_PARM_DESC(debug, "debug output mask");
4291 #endif
4292 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4293                    int, S_IRUGO);
4294 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4295 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4296 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4297
4298 module_exit(iwl3945_exit);
4299 module_init(iwl3945_init);