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 #include "iwl-legacy.h"
  65
  66 /*
  67  * module name, copyright, version, etc.
  68  */
  69
  70 #define DRV_DESCRIPTION \
  71 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  72
  73 #ifdef CONFIG_IWLWIFI_DEBUG
  74 #define VD "d"
  75 #else
  76 #define VD
  77 #endif
  78
  79 /*
  80  * add "s" to indicate spectrum measurement included.
  81  * we add it here to be consistent with previous releases in which
  82  * this was configurable.
  83  */
  84 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  85 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  86 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  87
  88 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  89 MODULE_VERSION(DRV_VERSION);
  90 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  91 MODULE_LICENSE("GPL");
  92
  93  /* module parameters */
  94 struct iwl_mod_params iwl3945_mod_params = {
  95         .sw_crypto = 1,
  96         .restart_fw = 1,
  97         /* the rest are 0 by default */
  98 };
  99
 100 /**
 101  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 102  * @priv: eeprom and antenna fields are used to determine antenna flags
 103  *
 104  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 105  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 106  *
 107  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 108  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 109  * IWL_ANTENNA_AUX       - Force AUX antenna
 110  */
 111 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 112 {
 113         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 114
 115         switch (iwl3945_mod_params.antenna) {
 116         case IWL_ANTENNA_DIVERSITY:
 117                 return 0;
 118
 119         case IWL_ANTENNA_MAIN:
 120                 if (eeprom->antenna_switch_type)
 121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 123
 124         case IWL_ANTENNA_AUX:
 125                 if (eeprom->antenna_switch_type)
 126                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 127                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 128         }
 129
 130         /* bad antenna selector value */
 131         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 132                 iwl3945_mod_params.antenna);
 133
 134         return 0;               /* "diversity" is default if error */
 135 }
 136
 137 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 138                                    struct ieee80211_key_conf *keyconf,
 139                                    u8 sta_id)
 140 {
 141         unsigned long flags;
 142         __le16 key_flags = 0;
 143         int ret;
 144
 145         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 146         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 147
 148         if (sta_id == priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id)
 149                 key_flags |= STA_KEY_MULTICAST_MSK;
 150
 151         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 152         keyconf->hw_key_idx = keyconf->keyidx;
 153         key_flags &= ~STA_KEY_FLG_INVALID;
 154
 155         spin_lock_irqsave(&priv->sta_lock, flags);
 156         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 157         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 158         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 159                keyconf->keylen);
 160
 161         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 162                keyconf->keylen);
 163
 164         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 165                         == STA_KEY_FLG_NO_ENC)
 166                 priv->stations[sta_id].sta.key.key_offset =
 167                                  iwl_get_free_ucode_key_index(priv);
 168         /* else, we are overriding an existing key => no need to allocated room
 169         * in uCode. */
 170
 171         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 172                 "no space for a new key");
 173
 174         priv->stations[sta_id].sta.key.key_flags = key_flags;
 175         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 176         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 177
 178         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 179
 180         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 181
 182         spin_unlock_irqrestore(&priv->sta_lock, flags);
 183
 184         return ret;
 185 }
 186
 187 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 188                                   struct ieee80211_key_conf *keyconf,
 189                                   u8 sta_id)
 190 {
 191         return -EOPNOTSUPP;
 192 }
 193
 194 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 195                                   struct ieee80211_key_conf *keyconf,
 196                                   u8 sta_id)
 197 {
 198         return -EOPNOTSUPP;
 199 }
 200
 201 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 202 {
 203         unsigned long flags;
 204         struct iwl_addsta_cmd sta_cmd;
 205
 206         spin_lock_irqsave(&priv->sta_lock, flags);
 207         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 208         memset(&priv->stations[sta_id].sta.key, 0,
 209                 sizeof(struct iwl4965_keyinfo));
 210         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 211         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 212         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 213         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 214         spin_unlock_irqrestore(&priv->sta_lock, flags);
 215
 216         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 217         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 218 }
 219
 220 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 221                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 222 {
 223         int ret = 0;
 224
 225         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 226
 227         switch (keyconf->cipher) {
 228         case WLAN_CIPHER_SUITE_CCMP:
 229                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case WLAN_CIPHER_SUITE_TKIP:
 232                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         case WLAN_CIPHER_SUITE_WEP40:
 235         case WLAN_CIPHER_SUITE_WEP104:
 236                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 237                 break;
 238         default:
 239                 IWL_ERR(priv, "Unknown alg: %s alg=%x\n", __func__,
 240                         keyconf->cipher);
 241                 ret = -EINVAL;
 242         }
 243
 244         IWL_DEBUG_WEP(priv, "Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 245                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 246                       sta_id, ret);
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 252 {
 253         int ret = -EOPNOTSUPP;
 254
 255         return ret;
 256 }
 257
 258 static int iwl3945_set_static_key(struct iwl_priv *priv,
 259                                 struct ieee80211_key_conf *key)
 260 {
 261         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 262             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 263                 return -EOPNOTSUPP;
 264
 265         IWL_ERR(priv, "Static key invalid: cipher %x\n", key->cipher);
 266         return -EINVAL;
 267 }
 268
 269 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 270 {
 271         struct list_head *element;
 272
 273         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 274                        priv->frames_count);
 275
 276         while (!list_empty(&priv->free_frames)) {
 277                 element = priv->free_frames.next;
 278                 list_del(element);
 279                 kfree(list_entry(element, struct iwl3945_frame, list));
 280                 priv->frames_count--;
 281         }
 282
 283         if (priv->frames_count) {
 284                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 285                             priv->frames_count);
 286                 priv->frames_count = 0;
 287         }
 288 }
 289
 290 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 291 {
 292         struct iwl3945_frame *frame;
 293         struct list_head *element;
 294         if (list_empty(&priv->free_frames)) {
 295                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 296                 if (!frame) {
 297                         IWL_ERR(priv, "Could not allocate frame!\n");
 298                         return NULL;
 299                 }
 300
 301                 priv->frames_count++;
 302                 return frame;
 303         }
 304
 305         element = priv->free_frames.next;
 306         list_del(element);
 307         return list_entry(element, struct iwl3945_frame, list);
 308 }
 309
 310 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 311 {
 312         memset(frame, 0, sizeof(*frame));
 313         list_add(&frame->list, &priv->free_frames);
 314 }
 315
 316 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 317                                 struct ieee80211_hdr *hdr,
 318                                 int left)
 319 {
 320
 321         if (!iwl_is_associated(priv, IWL_RXON_CTX_BSS) || !priv->beacon_skb)
 322                 return 0;
 323
 324         if (priv->beacon_skb->len > left)
 325                 return 0;
 326
 327         memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len);
 328
 329         return priv->beacon_skb->len;
 330 }
 331
 332 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 333 {
 334         struct iwl3945_frame *frame;
 335         unsigned int frame_size;
 336         int rc;
 337         u8 rate;
 338
 339         frame = iwl3945_get_free_frame(priv);
 340
 341         if (!frame) {
 342                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 343                           "command.\n");
 344                 return -ENOMEM;
 345         }
 346
 347         rate = iwl_rate_get_lowest_plcp(priv,
 348                                 &priv->contexts[IWL_RXON_CTX_BSS]);
 349
 350         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 351
 352         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 353                               &frame->u.cmd[0]);
 354
 355         iwl3945_free_frame(priv, frame);
 356
 357         return rc;
 358 }
 359
 360 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 361 {
 362         if (priv->_3945.shared_virt)
 363                 dma_free_coherent(&priv->pci_dev->dev,
 364                                   sizeof(struct iwl3945_shared),
 365                                   priv->_3945.shared_virt,
 366                                   priv->_3945.shared_phys);
 367 }
 368
 369 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 370                                       struct ieee80211_tx_info *info,
 371                                       struct iwl_device_cmd *cmd,
 372                                       struct sk_buff *skb_frag,
 373                                       int sta_id)
 374 {
 375         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 376         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 377
 378         tx_cmd->sec_ctl = 0;
 379
 380         switch (keyinfo->cipher) {
 381         case WLAN_CIPHER_SUITE_CCMP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 383                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 384                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 385                 break;
 386
 387         case WLAN_CIPHER_SUITE_TKIP:
 388                 break;
 389
 390         case WLAN_CIPHER_SUITE_WEP104:
 391                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 392                 /* fall through */
 393         case WLAN_CIPHER_SUITE_WEP40:
 394                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 395                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 396
 397                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 398
 399                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 400                              "with key %d\n", info->control.hw_key->hw_key_idx);
 401                 break;
 402
 403         default:
 404                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyinfo->cipher);
 405                 break;
 406         }
 407 }
 408
 409 /*
 410  * handle build REPLY_TX command notification.
 411  */
 412 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 413                                   struct iwl_device_cmd *cmd,
 414                                   struct ieee80211_tx_info *info,
 415                                   struct ieee80211_hdr *hdr, u8 std_id)
 416 {
 417         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 418         __le32 tx_flags = tx_cmd->tx_flags;
 419         __le16 fc = hdr->frame_control;
 420
 421         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 422         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 423                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 424                 if (ieee80211_is_mgmt(fc))
 425                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426                 if (ieee80211_is_probe_resp(fc) &&
 427                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 428                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 429         } else {
 430                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 431                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 432         }
 433
 434         tx_cmd->sta_id = std_id;
 435         if (ieee80211_has_morefrags(fc))
 436                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 437
 438         if (ieee80211_is_data_qos(fc)) {
 439                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 440                 tx_cmd->tid_tspec = qc[0] & 0xf;
 441                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 442         } else {
 443                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 444         }
 445
 446         priv->cfg->ops->utils->tx_cmd_protection(priv, info, fc, &tx_flags);
 447
 448         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 449         if (ieee80211_is_mgmt(fc)) {
 450                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 451                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 452                 else
 453                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 454         } else {
 455                 tx_cmd->timeout.pm_frame_timeout = 0;
 456         }
 457
 458         tx_cmd->driver_txop = 0;
 459         tx_cmd->tx_flags = tx_flags;
 460         tx_cmd->next_frame_len = 0;
 461 }
 462
 463 /*
 464  * start REPLY_TX command process
 465  */
 466 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 467 {
 468         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 469         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 470         struct iwl3945_tx_cmd *tx_cmd;
 471         struct iwl_tx_queue *txq = NULL;
 472         struct iwl_queue *q = NULL;
 473         struct iwl_device_cmd *out_cmd;
 474         struct iwl_cmd_meta *out_meta;
 475         dma_addr_t phys_addr;
 476         dma_addr_t txcmd_phys;
 477         int txq_id = skb_get_queue_mapping(skb);
 478         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 479         u8 id;
 480         u8 unicast;
 481         u8 sta_id;
 482         u8 tid = 0;
 483         __le16 fc;
 484         u8 wait_write_ptr = 0;
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&priv->lock, flags);
 488         if (iwl_is_rfkill(priv)) {
 489                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 490                 goto drop_unlock;
 491         }
 492
 493         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 494                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 495                 goto drop_unlock;
 496         }
 497
 498         unicast = !is_multicast_ether_addr(hdr->addr1);
 499         id = 0;
 500
 501         fc = hdr->frame_control;
 502
 503 #ifdef CONFIG_IWLWIFI_DEBUG
 504         if (ieee80211_is_auth(fc))
 505                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 506         else if (ieee80211_is_assoc_req(fc))
 507                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 508         else if (ieee80211_is_reassoc_req(fc))
 509                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 510 #endif
 511
 512         spin_unlock_irqrestore(&priv->lock, flags);
 513
 514         hdr_len = ieee80211_hdrlen(fc);
 515
 516         /* Find index into station table for destination station */
 517         sta_id = iwl_sta_id_or_broadcast(
 518                         priv, &priv->contexts[IWL_RXON_CTX_BSS],
 519                         info->control.sta);
 520         if (sta_id == IWL_INVALID_STATION) {
 521                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 522                                hdr->addr1);
 523                 goto drop;
 524         }
 525
 526         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 527
 528         if (ieee80211_is_data_qos(fc)) {
 529                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 530                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 531                 if (unlikely(tid >= MAX_TID_COUNT))
 532                         goto drop;
 533         }
 534
 535         /* Descriptor for chosen Tx queue */
 536         txq = &priv->txq[txq_id];
 537         q = &txq->q;
 538
 539         if ((iwl_queue_space(q) < q->high_mark))
 540                 goto drop;
 541
 542         spin_lock_irqsave(&priv->lock, flags);
 543
 544         idx = get_cmd_index(q, q->write_ptr, 0);
 545
 546         /* Set up driver data for this TFD */
 547         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 548         txq->txb[q->write_ptr].skb = skb;
 549         txq->txb[q->write_ptr].ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 550
 551         /* Init first empty entry in queue's array of Tx/cmd buffers */
 552         out_cmd = txq->cmd[idx];
 553         out_meta = &txq->meta[idx];
 554         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 555         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 556         memset(tx_cmd, 0, sizeof(*tx_cmd));
 557
 558         /*
 559          * Set up the Tx-command (not MAC!) header.
 560          * Store the chosen Tx queue and TFD index within the sequence field;
 561          * after Tx, uCode's Tx response will return this value so driver can
 562          * locate the frame within the tx queue and do post-tx processing.
 563          */
 564         out_cmd->hdr.cmd = REPLY_TX;
 565         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 566                                 INDEX_TO_SEQ(q->write_ptr)));
 567
 568         /* Copy MAC header from skb into command buffer */
 569         memcpy(tx_cmd->hdr, hdr, hdr_len);
 570
 571
 572         if (info->control.hw_key)
 573                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 574
 575         /* TODO need this for burst mode later on */
 576         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 577
 578         /* set is_hcca to 0; it probably will never be implemented */
 579         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 580
 581         /* Total # bytes to be transmitted */
 582         len = (u16)skb->len;
 583         tx_cmd->len = cpu_to_le16(len);
 584
 585         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 586         iwl_update_stats(priv, true, fc, len);
 587         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 589
 590         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 591                 txq->need_update = 1;
 592         } else {
 593                 wait_write_ptr = 1;
 594                 txq->need_update = 0;
 595         }
 596
 597         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 598                      le16_to_cpu(out_cmd->hdr.sequence));
 599         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 600         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 601         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 602                            ieee80211_hdrlen(fc));
 603
 604         /*
 605          * Use the first empty entry in this queue's command buffer array
 606          * to contain the Tx command and MAC header concatenated together
 607          * (payload data will be in another buffer).
 608          * Size of this varies, due to varying MAC header length.
 609          * If end is not dword aligned, we'll have 2 extra bytes at the end
 610          * of the MAC header (device reads on dword boundaries).
 611          * We'll tell device about this padding later.
 612          */
 613         len = sizeof(struct iwl3945_tx_cmd) +
 614                         sizeof(struct iwl_cmd_header) + hdr_len;
 615
 616         len_org = len;
 617         len = (len + 3) & ~3;
 618
 619         if (len_org != len)
 620                 len_org = 1;
 621         else
 622                 len_org = 0;
 623
 624         /* Physical address of this Tx command's header (not MAC header!),
 625          * within command buffer array. */
 626         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 627                                     len, PCI_DMA_TODEVICE);
 628         /* we do not map meta data ... so we can safely access address to
 629          * provide to unmap command*/
 630         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 631         dma_unmap_len_set(out_meta, len, len);
 632
 633         /* Add buffer containing Tx command and MAC(!) header to TFD's
 634          * first entry */
 635         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 636                                                    txcmd_phys, len, 1, 0);
 637
 638
 639         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 640          * if any (802.11 null frames have no payload). */
 641         len = skb->len - hdr_len;
 642         if (len) {
 643                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 644                                            len, PCI_DMA_TODEVICE);
 645                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 646                                                            phys_addr, len,
 647                                                            0, U32_PAD(len));
 648         }
 649
 650
 651         /* Tell device the write index *just past* this latest filled TFD */
 652         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 653         iwl_txq_update_write_ptr(priv, txq);
 654         spin_unlock_irqrestore(&priv->lock, flags);
 655
 656         if ((iwl_queue_space(q) < q->high_mark)
 657             && priv->mac80211_registered) {
 658                 if (wait_write_ptr) {
 659                         spin_lock_irqsave(&priv->lock, flags);
 660                         txq->need_update = 1;
 661                         iwl_txq_update_write_ptr(priv, txq);
 662                         spin_unlock_irqrestore(&priv->lock, flags);
 663                 }
 664
 665                 iwl_stop_queue(priv, txq);
 666         }
 667
 668         return 0;
 669
 670 drop_unlock:
 671         spin_unlock_irqrestore(&priv->lock, flags);
 672 drop:
 673         return -1;
 674 }
 675
 676 static int iwl3945_get_measurement(struct iwl_priv *priv,
 677                                struct ieee80211_measurement_params *params,
 678                                u8 type)
 679 {
 680         struct iwl_spectrum_cmd spectrum;
 681         struct iwl_rx_packet *pkt;
 682         struct iwl_host_cmd cmd = {
 683                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 684                 .data = (void *)&spectrum,
 685                 .flags = CMD_WANT_SKB,
 686         };
 687         u32 add_time = le64_to_cpu(params->start_time);
 688         int rc;
 689         int spectrum_resp_status;
 690         int duration = le16_to_cpu(params->duration);
 691         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 692
 693         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS))
 694                 add_time = iwl_usecs_to_beacons(priv,
 695                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 696                         le16_to_cpu(ctx->timing.beacon_interval));
 697
 698         memset(&spectrum, 0, sizeof(spectrum));
 699
 700         spectrum.channel_count = cpu_to_le16(1);
 701         spectrum.flags =
 702             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 703         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 704         cmd.len = sizeof(spectrum);
 705         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 706
 707         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS))
 708                 spectrum.start_time =
 709                         iwl_add_beacon_time(priv,
 710                                 priv->_3945.last_beacon_time, add_time,
 711                                 le16_to_cpu(ctx->timing.beacon_interval));
 712         else
 713                 spectrum.start_time = 0;
 714
 715         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 716         spectrum.channels[0].channel = params->channel;
 717         spectrum.channels[0].type = type;
 718         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 719                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 720                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 721
 722         rc = iwl_send_cmd_sync(priv, &cmd);
 723         if (rc)
 724                 return rc;
 725
 726         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 727         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 728                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 729                 rc = -EIO;
 730         }
 731
 732         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 733         switch (spectrum_resp_status) {
 734         case 0:         /* Command will be handled */
 735                 if (pkt->u.spectrum.id != 0xff) {
 736                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 737                                                 pkt->u.spectrum.id);
 738                         priv->measurement_status &= ~MEASUREMENT_READY;
 739                 }
 740                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 741                 rc = 0;
 742                 break;
 743
 744         case 1:         /* Command will not be handled */
 745                 rc = -EAGAIN;
 746                 break;
 747         }
 748
 749         iwl_free_pages(priv, cmd.reply_page);
 750
 751         return rc;
 752 }
 753
 754 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 755                                struct iwl_rx_mem_buffer *rxb)
 756 {
 757         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 758         struct iwl_alive_resp *palive;
 759         struct delayed_work *pwork;
 760
 761         palive = &pkt->u.alive_frame;
 762
 763         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 764                        "0x%01X 0x%01X\n",
 765                        palive->is_valid, palive->ver_type,
 766                        palive->ver_subtype);
 767
 768         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 769                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 770                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 771                        sizeof(struct iwl_alive_resp));
 772                 pwork = &priv->init_alive_start;
 773         } else {
 774                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 775                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 776                        sizeof(struct iwl_alive_resp));
 777                 pwork = &priv->alive_start;
 778                 iwl3945_disable_events(priv);
 779         }
 780
 781         /* We delay the ALIVE response by 5ms to
 782          * give the HW RF Kill time to activate... */
 783         if (palive->is_valid == UCODE_VALID_OK)
 784                 queue_delayed_work(priv->workqueue, pwork,
 785                                    msecs_to_jiffies(5));
 786         else
 787                 IWL_WARN(priv, "uCode did not respond OK.\n");
 788 }
 789
 790 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 791                                  struct iwl_rx_mem_buffer *rxb)
 792 {
 793 #ifdef CONFIG_IWLWIFI_DEBUG
 794         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 795 #endif
 796
 797         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 798 }
 799
 800 static void iwl3945_bg_beacon_update(struct work_struct *work)
 801 {
 802         struct iwl_priv *priv =
 803                 container_of(work, struct iwl_priv, beacon_update);
 804         struct sk_buff *beacon;
 805
 806         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 807         beacon = ieee80211_beacon_get(priv->hw,
 808                         priv->contexts[IWL_RXON_CTX_BSS].vif);
 809
 810         if (!beacon) {
 811                 IWL_ERR(priv, "update beacon failed\n");
 812                 return;
 813         }
 814
 815         mutex_lock(&priv->mutex);
 816         /* new beacon skb is allocated every time; dispose previous.*/
 817         if (priv->beacon_skb)
 818                 dev_kfree_skb(priv->beacon_skb);
 819
 820         priv->beacon_skb = beacon;
 821         mutex_unlock(&priv->mutex);
 822
 823         iwl3945_send_beacon_cmd(priv);
 824 }
 825
 826 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 827                                 struct iwl_rx_mem_buffer *rxb)
 828 {
 829         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 830         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 831 #ifdef CONFIG_IWLWIFI_DEBUG
 832         u8 rate = beacon->beacon_notify_hdr.rate;
 833
 834         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 835                 "tsf %d %d rate %d\n",
 836                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 837                 beacon->beacon_notify_hdr.failure_frame,
 838                 le32_to_cpu(beacon->ibss_mgr_status),
 839                 le32_to_cpu(beacon->high_tsf),
 840                 le32_to_cpu(beacon->low_tsf), rate);
 841 #endif
 842
 843         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 844
 845         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 846             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 847                 queue_work(priv->workqueue, &priv->beacon_update);
 848 }
 849
 850 /* Handle notification from uCode that card's power state is changing
 851  * due to software, hardware, or critical temperature RFKILL */
 852 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 853                                     struct iwl_rx_mem_buffer *rxb)
 854 {
 855         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 856         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 857         unsigned long status = priv->status;
 858
 859         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 860                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 861                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 862
 863         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 864                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 865
 866         if (flags & HW_CARD_DISABLED)
 867                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 868         else
 869                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 870
 871
 872         iwl_scan_cancel(priv);
 873
 874         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 875              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 876                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 877                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 878         else
 879                 wake_up_interruptible(&priv->wait_command_queue);
 880 }
 881
 882 /**
 883  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 884  *
 885  * Setup the RX handlers for each of the reply types sent from the uCode
 886  * to the host.
 887  *
 888  * This function chains into the hardware specific files for them to setup
 889  * any hardware specific handlers as well.
 890  */
 891 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 892 {
 893         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 894         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 895         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 896         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 897         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 898                         iwl_rx_spectrum_measure_notif;
 899         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 900         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 901             iwl_rx_pm_debug_statistics_notif;
 902         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 903
 904         /*
 905          * The same handler is used for both the REPLY to a discrete
 906          * statistics request from the host as well as for the periodic
 907          * statistics notifications (after received beacons) from the uCode.
 908          */
 909         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 910         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 911
 912         iwl_setup_rx_scan_handlers(priv);
 913         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 914
 915         /* Set up hardware specific Rx handlers */
 916         iwl3945_hw_rx_handler_setup(priv);
 917 }
 918
 919 /************************** RX-FUNCTIONS ****************************/
 920 /*
 921  * Rx theory of operation
 922  *
 923  * The host allocates 32 DMA target addresses and passes the host address
 924  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 925  * 0 to 31
 926  *
 927  * Rx Queue Indexes
 928  * The host/firmware share two index registers for managing the Rx buffers.
 929  *
 930  * The READ index maps to the first position that the firmware may be writing
 931  * to -- the driver can read up to (but not including) this position and get
 932  * good data.
 933  * The READ index is managed by the firmware once the card is enabled.
 934  *
 935  * The WRITE index maps to the last position the driver has read from -- the
 936  * position preceding WRITE is the last slot the firmware can place a packet.
 937  *
 938  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 939  * WRITE = READ.
 940  *
 941  * During initialization, the host sets up the READ queue position to the first
 942  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 943  *
 944  * When the firmware places a packet in a buffer, it will advance the READ index
 945  * and fire the RX interrupt.  The driver can then query the READ index and
 946  * process as many packets as possible, moving the WRITE index forward as it
 947  * resets the Rx queue buffers with new memory.
 948  *
 949  * The management in the driver is as follows:
 950  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 951  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 952  *   to replenish the iwl->rxq->rx_free.
 953  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 954  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 955  *   'processed' and 'read' driver indexes as well)
 956  * + A received packet is processed and handed to the kernel network stack,
 957  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 958  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 959  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 960  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 961  *   were enough free buffers and RX_STALLED is set it is cleared.
 962  *
 963  *
 964  * Driver sequence:
 965  *
 966  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 967  *                            iwl3945_rx_queue_restock
 968  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 969  *                            queue, updates firmware pointers, and updates
 970  *                            the WRITE index.  If insufficient rx_free buffers
 971  *                            are available, schedules iwl3945_rx_replenish
 972  *
 973  * -- enable interrupts --
 974  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 975  *                            READ INDEX, detaching the SKB from the pool.
 976  *                            Moves the packet buffer from queue to rx_used.
 977  *                            Calls iwl3945_rx_queue_restock to refill any empty
 978  *                            slots.
 979  * ...
 980  *
 981  */
 982
 983 /**
 984  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 985  */
 986 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 987                                           dma_addr_t dma_addr)
 988 {
 989         return cpu_to_le32((u32)dma_addr);
 990 }
 991
 992 /**
 993  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 994  *
 995  * If there are slots in the RX queue that need to be restocked,
 996  * and we have free pre-allocated buffers, fill the ranks as much
 997  * as we can, pulling from rx_free.
 998  *
 999  * This moves the 'write' index forward to catch up with 'processed', and
1000  * also updates the memory address in the firmware to reference the new
1001  * target buffer.
1002  */
1003 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
1004 {
1005         struct iwl_rx_queue *rxq = &priv->rxq;
1006         struct list_head *element;
1007         struct iwl_rx_mem_buffer *rxb;
1008         unsigned long flags;
1009         int write;
1010
1011         spin_lock_irqsave(&rxq->lock, flags);
1012         write = rxq->write & ~0x7;
1013         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1014                 /* Get next free Rx buffer, remove from free list */
1015                 element = rxq->rx_free.next;
1016                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1017                 list_del(element);
1018
1019                 /* Point to Rx buffer via next RBD in circular buffer */
1020                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1021                 rxq->queue[rxq->write] = rxb;
1022                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1023                 rxq->free_count--;
1024         }
1025         spin_unlock_irqrestore(&rxq->lock, flags);
1026         /* If the pre-allocated buffer pool is dropping low, schedule to
1027          * refill it */
1028         if (rxq->free_count <= RX_LOW_WATERMARK)
1029                 queue_work(priv->workqueue, &priv->rx_replenish);
1030
1031
1032         /* If we've added more space for the firmware to place data, tell it.
1033          * Increment device's write pointer in multiples of 8. */
1034         if ((rxq->write_actual != (rxq->write & ~0x7))
1035             || (abs(rxq->write - rxq->read) > 7)) {
1036                 spin_lock_irqsave(&rxq->lock, flags);
1037                 rxq->need_update = 1;
1038                 spin_unlock_irqrestore(&rxq->lock, flags);
1039                 iwl_rx_queue_update_write_ptr(priv, rxq);
1040         }
1041 }
1042
1043 /**
1044  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1045  *
1046  * When moving to rx_free an SKB is allocated for the slot.
1047  *
1048  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1049  * This is called as a scheduled work item (except for during initialization)
1050  */
1051 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1052 {
1053         struct iwl_rx_queue *rxq = &priv->rxq;
1054         struct list_head *element;
1055         struct iwl_rx_mem_buffer *rxb;
1056         struct page *page;
1057         unsigned long flags;
1058         gfp_t gfp_mask = priority;
1059
1060         while (1) {
1061                 spin_lock_irqsave(&rxq->lock, flags);
1062
1063                 if (list_empty(&rxq->rx_used)) {
1064                         spin_unlock_irqrestore(&rxq->lock, flags);
1065                         return;
1066                 }
1067                 spin_unlock_irqrestore(&rxq->lock, flags);
1068
1069                 if (rxq->free_count > RX_LOW_WATERMARK)
1070                         gfp_mask |= __GFP_NOWARN;
1071
1072                 if (priv->hw_params.rx_page_order > 0)
1073                         gfp_mask |= __GFP_COMP;
1074
1075                 /* Alloc a new receive buffer */
1076                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1077                 if (!page) {
1078                         if (net_ratelimit())
1079                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1080                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1081                             net_ratelimit())
1082                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1083                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1084                                          rxq->free_count);
1085                         /* We don't reschedule replenish work here -- we will
1086                          * call the restock method and if it still needs
1087                          * more buffers it will schedule replenish */
1088                         break;
1089                 }
1090
1091                 spin_lock_irqsave(&rxq->lock, flags);
1092                 if (list_empty(&rxq->rx_used)) {
1093                         spin_unlock_irqrestore(&rxq->lock, flags);
1094                         __free_pages(page, priv->hw_params.rx_page_order);
1095                         return;
1096                 }
1097                 element = rxq->rx_used.next;
1098                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1099                 list_del(element);
1100                 spin_unlock_irqrestore(&rxq->lock, flags);
1101
1102                 rxb->page = page;
1103                 /* Get physical address of RB/SKB */
1104                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1105                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1106                                 PCI_DMA_FROMDEVICE);
1107
1108                 spin_lock_irqsave(&rxq->lock, flags);
1109
1110                 list_add_tail(&rxb->list, &rxq->rx_free);
1111                 rxq->free_count++;
1112                 priv->alloc_rxb_page++;
1113
1114                 spin_unlock_irqrestore(&rxq->lock, flags);
1115         }
1116 }
1117
1118 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1119 {
1120         unsigned long flags;
1121         int i;
1122         spin_lock_irqsave(&rxq->lock, flags);
1123         INIT_LIST_HEAD(&rxq->rx_free);
1124         INIT_LIST_HEAD(&rxq->rx_used);
1125         /* Fill the rx_used queue with _all_ of the Rx buffers */
1126         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1127                 /* In the reset function, these buffers may have been allocated
1128                  * to an SKB, so we need to unmap and free potential storage */
1129                 if (rxq->pool[i].page != NULL) {
1130                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1131                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1132                                 PCI_DMA_FROMDEVICE);
1133                         __iwl_free_pages(priv, rxq->pool[i].page);
1134                         rxq->pool[i].page = NULL;
1135                 }
1136                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1137         }
1138
1139         /* Set us so that we have processed and used all buffers, but have
1140          * not restocked the Rx queue with fresh buffers */
1141         rxq->read = rxq->write = 0;
1142         rxq->write_actual = 0;
1143         rxq->free_count = 0;
1144         spin_unlock_irqrestore(&rxq->lock, flags);
1145 }
1146
1147 void iwl3945_rx_replenish(void *data)
1148 {
1149         struct iwl_priv *priv = data;
1150         unsigned long flags;
1151
1152         iwl3945_rx_allocate(priv, GFP_KERNEL);
1153
1154         spin_lock_irqsave(&priv->lock, flags);
1155         iwl3945_rx_queue_restock(priv);
1156         spin_unlock_irqrestore(&priv->lock, flags);
1157 }
1158
1159 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1160 {
1161         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1162
1163         iwl3945_rx_queue_restock(priv);
1164 }
1165
1166
1167 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1168  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1169  * This free routine walks the list of POOL entries and if SKB is set to
1170  * non NULL it is unmapped and freed
1171  */
1172 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1173 {
1174         int i;
1175         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1176                 if (rxq->pool[i].page != NULL) {
1177                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1178                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1179                                 PCI_DMA_FROMDEVICE);
1180                         __iwl_free_pages(priv, rxq->pool[i].page);
1181                         rxq->pool[i].page = NULL;
1182                 }
1183         }
1184
1185         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1186                           rxq->bd_dma);
1187         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1188                           rxq->rb_stts, rxq->rb_stts_dma);
1189         rxq->bd = NULL;
1190         rxq->rb_stts  = NULL;
1191 }
1192
1193
1194 /* Convert linear signal-to-noise ratio into dB */
1195 static u8 ratio2dB[100] = {
1196 /*       0   1   2   3   4   5   6   7   8   9 */
1197          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1198         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1199         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1200         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1201         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1202         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1203         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1204         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1205         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1206         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1207 };
1208
1209 /* Calculates a relative dB value from a ratio of linear
1210  *   (i.e. not dB) signal levels.
1211  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1212 int iwl3945_calc_db_from_ratio(int sig_ratio)
1213 {
1214         /* 1000:1 or higher just report as 60 dB */
1215         if (sig_ratio >= 1000)
1216                 return 60;
1217
1218         /* 100:1 or higher, divide by 10 and use table,
1219          *   add 20 dB to make up for divide by 10 */
1220         if (sig_ratio >= 100)
1221                 return 20 + (int)ratio2dB[sig_ratio/10];
1222
1223         /* We shouldn't see this */
1224         if (sig_ratio < 1)
1225                 return 0;
1226
1227         /* Use table for ratios 1:1 - 99:1 */
1228         return (int)ratio2dB[sig_ratio];
1229 }
1230
1231 /**
1232  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1233  *
1234  * Uses the priv->rx_handlers callback function array to invoke
1235  * the appropriate handlers, including command responses,
1236  * frame-received notifications, and other notifications.
1237  */
1238 static void iwl3945_rx_handle(struct iwl_priv *priv)
1239 {
1240         struct iwl_rx_mem_buffer *rxb;
1241         struct iwl_rx_packet *pkt;
1242         struct iwl_rx_queue *rxq = &priv->rxq;
1243         u32 r, i;
1244         int reclaim;
1245         unsigned long flags;
1246         u8 fill_rx = 0;
1247         u32 count = 8;
1248         int total_empty = 0;
1249
1250         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1251          * buffer that the driver may process (last buffer filled by ucode). */
1252         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1253         i = rxq->read;
1254
1255         /* calculate total frames need to be restock after handling RX */
1256         total_empty = r - rxq->write_actual;
1257         if (total_empty < 0)
1258                 total_empty += RX_QUEUE_SIZE;
1259
1260         if (total_empty > (RX_QUEUE_SIZE / 2))
1261                 fill_rx = 1;
1262         /* Rx interrupt, but nothing sent from uCode */
1263         if (i == r)
1264                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1265
1266         while (i != r) {
1267                 int len;
1268
1269                 rxb = rxq->queue[i];
1270
1271                 /* If an RXB doesn't have a Rx queue slot associated with it,
1272                  * then a bug has been introduced in the queue refilling
1273                  * routines -- catch it here */
1274                 BUG_ON(rxb == NULL);
1275
1276                 rxq->queue[i] = NULL;
1277
1278                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1279                                PAGE_SIZE << priv->hw_params.rx_page_order,
1280                                PCI_DMA_FROMDEVICE);
1281                 pkt = rxb_addr(rxb);
1282
1283                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1284                 len += sizeof(u32); /* account for status word */
1285                 trace_iwlwifi_dev_rx(priv, pkt, len);
1286
1287                 /* Reclaim a command buffer only if this packet is a response
1288                  *   to a (driver-originated) command.
1289                  * If the packet (e.g. Rx frame) originated from uCode,
1290                  *   there is no command buffer to reclaim.
1291                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1292                  *   but apparently a few don't get set; catch them here. */
1293                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1294                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1295                         (pkt->hdr.cmd != REPLY_TX);
1296
1297                 /* Based on type of command response or notification,
1298                  *   handle those that need handling via function in
1299                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1300                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1301                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1302                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1303                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1304                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1305                 } else {
1306                         /* No handling needed */
1307                         IWL_DEBUG_RX(priv,
1308                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1309                                 r, i, get_cmd_string(pkt->hdr.cmd),
1310                                 pkt->hdr.cmd);
1311                 }
1312
1313                 /*
1314                  * XXX: After here, we should always check rxb->page
1315                  * against NULL before touching it or its virtual
1316                  * memory (pkt). Because some rx_handler might have
1317                  * already taken or freed the pages.
1318                  */
1319
1320                 if (reclaim) {
1321                         /* Invoke any callbacks, transfer the buffer to caller,
1322                          * and fire off the (possibly) blocking iwl_send_cmd()
1323                          * as we reclaim the driver command queue */
1324                         if (rxb->page)
1325                                 iwl_tx_cmd_complete(priv, rxb);
1326                         else
1327                                 IWL_WARN(priv, "Claim null rxb?\n");
1328                 }
1329
1330                 /* Reuse the page if possible. For notification packets and
1331                  * SKBs that fail to Rx correctly, add them back into the
1332                  * rx_free list for reuse later. */
1333                 spin_lock_irqsave(&rxq->lock, flags);
1334                 if (rxb->page != NULL) {
1335                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1336                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1337                                 PCI_DMA_FROMDEVICE);
1338                         list_add_tail(&rxb->list, &rxq->rx_free);
1339                         rxq->free_count++;
1340                 } else
1341                         list_add_tail(&rxb->list, &rxq->rx_used);
1342
1343                 spin_unlock_irqrestore(&rxq->lock, flags);
1344
1345                 i = (i + 1) & RX_QUEUE_MASK;
1346                 /* If there are a lot of unused frames,
1347                  * restock the Rx queue so ucode won't assert. */
1348                 if (fill_rx) {
1349                         count++;
1350                         if (count >= 8) {
1351                                 rxq->read = i;
1352                                 iwl3945_rx_replenish_now(priv);
1353                                 count = 0;
1354                         }
1355                 }
1356         }
1357
1358         /* Backtrack one entry */
1359         rxq->read = i;
1360         if (fill_rx)
1361                 iwl3945_rx_replenish_now(priv);
1362         else
1363                 iwl3945_rx_queue_restock(priv);
1364 }
1365
1366 /* call this function to flush any scheduled tasklet */
1367 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1368 {
1369         /* wait to make sure we flush pending tasklet*/
1370         synchronize_irq(priv->pci_dev->irq);
1371         tasklet_kill(&priv->irq_tasklet);
1372 }
1373
1374 static const char *desc_lookup(int i)
1375 {
1376         switch (i) {
1377         case 1:
1378                 return "FAIL";
1379         case 2:
1380                 return "BAD_PARAM";
1381         case 3:
1382                 return "BAD_CHECKSUM";
1383         case 4:
1384                 return "NMI_INTERRUPT";
1385         case 5:
1386                 return "SYSASSERT";
1387         case 6:
1388                 return "FATAL_ERROR";
1389         }
1390
1391         return "UNKNOWN";
1392 }
1393
1394 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1395 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1396
1397 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1398 {
1399         u32 i;
1400         u32 desc, time, count, base, data1;
1401         u32 blink1, blink2, ilink1, ilink2;
1402
1403         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1404
1405         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1406                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1407                 return;
1408         }
1409
1410
1411         count = iwl_read_targ_mem(priv, base);
1412
1413         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1414                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1415                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1416                         priv->status, count);
1417         }
1418
1419         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1420                   "ilink1  nmiPC   Line\n");
1421         for (i = ERROR_START_OFFSET;
1422              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1423              i += ERROR_ELEM_SIZE) {
1424                 desc = iwl_read_targ_mem(priv, base + i);
1425                 time =
1426                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1427                 blink1 =
1428                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1429                 blink2 =
1430                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1431                 ilink1 =
1432                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1433                 ilink2 =
1434                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1435                 data1 =
1436                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1437
1438                 IWL_ERR(priv,
1439                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1440                         desc_lookup(desc), desc, time, blink1, blink2,
1441                         ilink1, ilink2, data1);
1442                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1443                                         0, blink1, blink2, ilink1, ilink2);
1444         }
1445 }
1446
1447 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1448
1449 /**
1450  * iwl3945_print_event_log - Dump error event log to syslog
1451  *
1452  */
1453 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1454                                   u32 num_events, u32 mode,
1455                                   int pos, char **buf, size_t bufsz)
1456 {
1457         u32 i;
1458         u32 base;       /* SRAM byte address of event log header */
1459         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1460         u32 ptr;        /* SRAM byte address of log data */
1461         u32 ev, time, data; /* event log data */
1462         unsigned long reg_flags;
1463
1464         if (num_events == 0)
1465                 return pos;
1466
1467         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1468
1469         if (mode == 0)
1470                 event_size = 2 * sizeof(u32);
1471         else
1472                 event_size = 3 * sizeof(u32);
1473
1474         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1475
1476         /* Make sure device is powered up for SRAM reads */
1477         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1478         iwl_grab_nic_access(priv);
1479
1480         /* Set starting address; reads will auto-increment */
1481         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1482         rmb();
1483
1484         /* "time" is actually "data" for mode 0 (no timestamp).
1485          * place event id # at far right for easier visual parsing. */
1486         for (i = 0; i < num_events; i++) {
1487                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1488                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1489                 if (mode == 0) {
1490                         /* data, ev */
1491                         if (bufsz) {
1492                                 pos += scnprintf(*buf + pos, bufsz - pos,
1493                                                 "0x%08x:%04u\n",
1494                                                 time, ev);
1495                         } else {
1496                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1497                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1498                                                               time, ev);
1499                         }
1500                 } else {
1501                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1502                         if (bufsz) {
1503                                 pos += scnprintf(*buf + pos, bufsz - pos,
1504                                                 "%010u:0x%08x:%04u\n",
1505                                                  time, data, ev);
1506                         } else {
1507                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1508                                         time, data, ev);
1509                                 trace_iwlwifi_dev_ucode_event(priv, time,
1510                                                               data, ev);
1511                         }
1512                 }
1513         }
1514
1515         /* Allow device to power down */
1516         iwl_release_nic_access(priv);
1517         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1518         return pos;
1519 }
1520
1521 /**
1522  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1523  */
1524 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1525                                       u32 num_wraps, u32 next_entry,
1526                                       u32 size, u32 mode,
1527                                       int pos, char **buf, size_t bufsz)
1528 {
1529         /*
1530          * display the newest DEFAULT_LOG_ENTRIES entries
1531          * i.e the entries just before the next ont that uCode would fill.
1532          */
1533         if (num_wraps) {
1534                 if (next_entry < size) {
1535                         pos = iwl3945_print_event_log(priv,
1536                                              capacity - (size - next_entry),
1537                                              size - next_entry, mode,
1538                                              pos, buf, bufsz);
1539                         pos = iwl3945_print_event_log(priv, 0,
1540                                                       next_entry, mode,
1541                                                       pos, buf, bufsz);
1542                 } else
1543                         pos = iwl3945_print_event_log(priv, next_entry - size,
1544                                                       size, mode,
1545                                                       pos, buf, bufsz);
1546         } else {
1547                 if (next_entry < size)
1548                         pos = iwl3945_print_event_log(priv, 0,
1549                                                       next_entry, mode,
1550                                                       pos, buf, bufsz);
1551                 else
1552                         pos = iwl3945_print_event_log(priv, next_entry - size,
1553                                                       size, mode,
1554                                                       pos, buf, bufsz);
1555         }
1556         return pos;
1557 }
1558
1559 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1560
1561 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1562                             char **buf, bool display)
1563 {
1564         u32 base;       /* SRAM byte address of event log header */
1565         u32 capacity;   /* event log capacity in # entries */
1566         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1567         u32 num_wraps;  /* # times uCode wrapped to top of log */
1568         u32 next_entry; /* index of next entry to be written by uCode */
1569         u32 size;       /* # entries that we'll print */
1570         int pos = 0;
1571         size_t bufsz = 0;
1572
1573         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1574         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1575                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1576                 return  -EINVAL;
1577         }
1578
1579         /* event log header */
1580         capacity = iwl_read_targ_mem(priv, base);
1581         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1582         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1583         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1584
1585         if (capacity > priv->cfg->base_params->max_event_log_size) {
1586                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1587                         capacity, priv->cfg->base_params->max_event_log_size);
1588                 capacity = priv->cfg->base_params->max_event_log_size;
1589         }
1590
1591         if (next_entry > priv->cfg->base_params->max_event_log_size) {
1592                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1593                         next_entry, priv->cfg->base_params->max_event_log_size);
1594                 next_entry = priv->cfg->base_params->max_event_log_size;
1595         }
1596
1597         size = num_wraps ? capacity : next_entry;
1598
1599         /* bail out if nothing in log */
1600         if (size == 0) {
1601                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1602                 return pos;
1603         }
1604
1605 #ifdef CONFIG_IWLWIFI_DEBUG
1606         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1607                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1608                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1609 #else
1610         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1611                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1612 #endif
1613
1614         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1615                   size);
1616
1617 #ifdef CONFIG_IWLWIFI_DEBUG
1618         if (display) {
1619                 if (full_log)
1620                         bufsz = capacity * 48;
1621                 else
1622                         bufsz = size * 48;
1623                 *buf = kmalloc(bufsz, GFP_KERNEL);
1624                 if (!*buf)
1625                         return -ENOMEM;
1626         }
1627         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1628                 /* if uCode has wrapped back to top of log,
1629                  * start at the oldest entry,
1630                  * i.e the next one that uCode would fill.
1631                  */
1632                 if (num_wraps)
1633                         pos = iwl3945_print_event_log(priv, next_entry,
1634                                                 capacity - next_entry, mode,
1635                                                 pos, buf, bufsz);
1636
1637                 /* (then/else) start at top of log */
1638                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1639                                               pos, buf, bufsz);
1640         } else
1641                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1642                                                     next_entry, size, mode,
1643                                                     pos, buf, bufsz);
1644 #else
1645         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1646                                             next_entry, size, mode,
1647                                             pos, buf, bufsz);
1648 #endif
1649         return pos;
1650 }
1651
1652 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1653 {
1654         u32 inta, handled = 0;
1655         u32 inta_fh;
1656         unsigned long flags;
1657 #ifdef CONFIG_IWLWIFI_DEBUG
1658         u32 inta_mask;
1659 #endif
1660
1661         spin_lock_irqsave(&priv->lock, flags);
1662
1663         /* Ack/clear/reset pending uCode interrupts.
1664          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1665          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1666         inta = iwl_read32(priv, CSR_INT);
1667         iwl_write32(priv, CSR_INT, inta);
1668
1669         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1670          * Any new interrupts that happen after this, either while we're
1671          * in this tasklet, or later, will show up in next ISR/tasklet. */
1672         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1673         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1674
1675 #ifdef CONFIG_IWLWIFI_DEBUG
1676         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1677                 /* just for debug */
1678                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1679                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1680                               inta, inta_mask, inta_fh);
1681         }
1682 #endif
1683
1684         spin_unlock_irqrestore(&priv->lock, flags);
1685
1686         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1687          * atomic, make sure that inta covers all the interrupts that
1688          * we've discovered, even if FH interrupt came in just after
1689          * reading CSR_INT. */
1690         if (inta_fh & CSR39_FH_INT_RX_MASK)
1691                 inta |= CSR_INT_BIT_FH_RX;
1692         if (inta_fh & CSR39_FH_INT_TX_MASK)
1693                 inta |= CSR_INT_BIT_FH_TX;
1694
1695         /* Now service all interrupt bits discovered above. */
1696         if (inta & CSR_INT_BIT_HW_ERR) {
1697                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1698
1699                 /* Tell the device to stop sending interrupts */
1700                 iwl_disable_interrupts(priv);
1701
1702                 priv->isr_stats.hw++;
1703                 iwl_irq_handle_error(priv);
1704
1705                 handled |= CSR_INT_BIT_HW_ERR;
1706
1707                 return;
1708         }
1709
1710 #ifdef CONFIG_IWLWIFI_DEBUG
1711         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1712                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1713                 if (inta & CSR_INT_BIT_SCD) {
1714                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1715                                       "the frame/frames.\n");
1716                         priv->isr_stats.sch++;
1717                 }
1718
1719                 /* Alive notification via Rx interrupt will do the real work */
1720                 if (inta & CSR_INT_BIT_ALIVE) {
1721                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1722                         priv->isr_stats.alive++;
1723                 }
1724         }
1725 #endif
1726         /* Safely ignore these bits for debug checks below */
1727         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1728
1729         /* Error detected by uCode */
1730         if (inta & CSR_INT_BIT_SW_ERR) {
1731                 IWL_ERR(priv, "Microcode SW error detected. "
1732                         "Restarting 0x%X.\n", inta);
1733                 priv->isr_stats.sw++;
1734                 iwl_irq_handle_error(priv);
1735                 handled |= CSR_INT_BIT_SW_ERR;
1736         }
1737
1738         /* uCode wakes up after power-down sleep */
1739         if (inta & CSR_INT_BIT_WAKEUP) {
1740                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1741                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1742                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1743                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1744                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1745                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1746                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1747                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1748
1749                 priv->isr_stats.wakeup++;
1750                 handled |= CSR_INT_BIT_WAKEUP;
1751         }
1752
1753         /* All uCode command responses, including Tx command responses,
1754          * Rx "responses" (frame-received notification), and other
1755          * notifications from uCode come through here*/
1756         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1757                 iwl3945_rx_handle(priv);
1758                 priv->isr_stats.rx++;
1759                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1760         }
1761
1762         if (inta & CSR_INT_BIT_FH_TX) {
1763                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1764                 priv->isr_stats.tx++;
1765
1766                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1767                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1768                                         (FH39_SRVC_CHNL), 0x0);
1769                 handled |= CSR_INT_BIT_FH_TX;
1770         }
1771
1772         if (inta & ~handled) {
1773                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1774                 priv->isr_stats.unhandled++;
1775         }
1776
1777         if (inta & ~priv->inta_mask) {
1778                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1779                          inta & ~priv->inta_mask);
1780                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1781         }
1782
1783         /* Re-enable all interrupts */
1784         /* only Re-enable if disabled by irq */
1785         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1786                 iwl_enable_interrupts(priv);
1787
1788 #ifdef CONFIG_IWLWIFI_DEBUG
1789         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1790                 inta = iwl_read32(priv, CSR_INT);
1791                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1792                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1793                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1794                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1795         }
1796 #endif
1797 }
1798
1799 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1800                                                struct ieee80211_vif *vif,
1801                                                enum ieee80211_band band,
1802                                                struct iwl3945_scan_channel *scan_ch)
1803 {
1804         const struct ieee80211_supported_band *sband;
1805         u16 passive_dwell = 0;
1806         u16 active_dwell = 0;
1807         int added = 0;
1808         u8 channel = 0;
1809
1810         sband = iwl_get_hw_mode(priv, band);
1811         if (!sband) {
1812                 IWL_ERR(priv, "invalid band\n");
1813                 return added;
1814         }
1815
1816         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1817         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1818
1819         if (passive_dwell <= active_dwell)
1820                 passive_dwell = active_dwell + 1;
1821
1822
1823         channel = iwl_get_single_channel_number(priv, band);
1824
1825         if (channel) {
1826                 scan_ch->channel = channel;
1827                 scan_ch->type = 0;      /* passive */
1828                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1829                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1830                 /* Set txpower levels to defaults */
1831                 scan_ch->tpc.dsp_atten = 110;
1832                 if (band == IEEE80211_BAND_5GHZ)
1833                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1834                 else
1835                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1836                 added++;
1837         } else
1838                 IWL_ERR(priv, "no valid channel found\n");
1839         return added;
1840 }
1841
1842 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1843                                          enum ieee80211_band band,
1844                                      u8 is_active, u8 n_probes,
1845                                      struct iwl3945_scan_channel *scan_ch,
1846                                      struct ieee80211_vif *vif)
1847 {
1848         struct ieee80211_channel *chan;
1849         const struct ieee80211_supported_band *sband;
1850         const struct iwl_channel_info *ch_info;
1851         u16 passive_dwell = 0;
1852         u16 active_dwell = 0;
1853         int added, i;
1854
1855         sband = iwl_get_hw_mode(priv, band);
1856         if (!sband)
1857                 return 0;
1858
1859         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1860         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1861
1862         if (passive_dwell <= active_dwell)
1863                 passive_dwell = active_dwell + 1;
1864
1865         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1866                 chan = priv->scan_request->channels[i];
1867
1868                 if (chan->band != band)
1869                         continue;
1870
1871                 scan_ch->channel = chan->hw_value;
1872
1873                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1874                 if (!is_channel_valid(ch_info)) {
1875                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1876                                        scan_ch->channel);
1877                         continue;
1878                 }
1879
1880                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1881                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1882                 /* If passive , set up for auto-switch
1883                  *  and use long active_dwell time.
1884                  */
1885                 if (!is_active || is_channel_passive(ch_info) ||
1886                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1887                         scan_ch->type = 0;      /* passive */
1888                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1889                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1890                 } else {
1891                         scan_ch->type = 1;      /* active */
1892                 }
1893
1894                 /* Set direct probe bits. These may be used both for active
1895                  * scan channels (probes gets sent right away),
1896                  * or for passive channels (probes get se sent only after
1897                  * hearing clear Rx packet).*/
1898                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1899                         if (n_probes)
1900                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1901                 } else {
1902                         /* uCode v1 does not allow setting direct probe bits on
1903                          * passive channel. */
1904                         if ((scan_ch->type & 1) && n_probes)
1905                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1906                 }
1907
1908                 /* Set txpower levels to defaults */
1909                 scan_ch->tpc.dsp_atten = 110;
1910                 /* scan_pwr_info->tpc.dsp_atten; */
1911
1912                 /*scan_pwr_info->tpc.tx_gain; */
1913                 if (band == IEEE80211_BAND_5GHZ)
1914                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1915                 else {
1916                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1917                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1918                          * power level:
1919                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1920                          */
1921                 }
1922
1923                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1924                                scan_ch->channel,
1925                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1926                                (scan_ch->type & 1) ?
1927                                active_dwell : passive_dwell);
1928
1929                 scan_ch++;
1930                 added++;
1931         }
1932
1933         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1934         return added;
1935 }
1936
1937 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1938                               struct ieee80211_rate *rates)
1939 {
1940         int i;
1941
1942         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1943                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1944                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1945                 rates[i].hw_value_short = i;
1946                 rates[i].flags = 0;
1947                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1948                         /*
1949                          * If CCK != 1M then set short preamble rate flag.
1950                          */
1951                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1952                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1953                 }
1954         }
1955 }
1956
1957 /******************************************************************************
1958  *
1959  * uCode download functions
1960  *
1961  ******************************************************************************/
1962
1963 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1964 {
1965         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1966         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1967         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1968         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1969         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1970         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1971 }
1972
1973 /**
1974  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1975  *     looking at all data.
1976  */
1977 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1978 {
1979         u32 val;
1980         u32 save_len = len;
1981         int rc = 0;
1982         u32 errcnt;
1983
1984         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1985
1986         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1987                                IWL39_RTC_INST_LOWER_BOUND);
1988
1989         errcnt = 0;
1990         for (; len > 0; len -= sizeof(u32), image++) {
1991                 /* read data comes through single port, auto-incr addr */
1992                 /* NOTE: Use the debugless read so we don't flood kernel log
1993                  * if IWL_DL_IO is set */
1994                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1995                 if (val != le32_to_cpu(*image)) {
1996                         IWL_ERR(priv, "uCode INST section is invalid at "
1997                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1998                                   save_len - len, val, le32_to_cpu(*image));
1999                         rc = -EIO;
2000                         errcnt++;
2001                         if (errcnt >= 20)
2002                                 break;
2003                 }
2004         }
2005
2006
2007         if (!errcnt)
2008                 IWL_DEBUG_INFO(priv,
2009                         "ucode image in INSTRUCTION memory is good\n");
2010
2011         return rc;
2012 }
2013
2014
2015 /**
2016  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2017  *   using sample data 100 bytes apart.  If these sample points are good,
2018  *   it's a pretty good bet that everything between them is good, too.
2019  */
2020 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2021 {
2022         u32 val;
2023         int rc = 0;
2024         u32 errcnt = 0;
2025         u32 i;
2026
2027         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2028
2029         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2030                 /* read data comes through single port, auto-incr addr */
2031                 /* NOTE: Use the debugless read so we don't flood kernel log
2032                  * if IWL_DL_IO is set */
2033                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2034                         i + IWL39_RTC_INST_LOWER_BOUND);
2035                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2036                 if (val != le32_to_cpu(*image)) {
2037 #if 0 /* Enable this if you want to see details */
2038                         IWL_ERR(priv, "uCode INST section is invalid at "
2039                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2040                                   i, val, *image);
2041 #endif
2042                         rc = -EIO;
2043                         errcnt++;
2044                         if (errcnt >= 3)
2045                                 break;
2046                 }
2047         }
2048
2049         return rc;
2050 }
2051
2052
2053 /**
2054  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2055  *    and verify its contents
2056  */
2057 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2058 {
2059         __le32 *image;
2060         u32 len;
2061         int rc = 0;
2062
2063         /* Try bootstrap */
2064         image = (__le32 *)priv->ucode_boot.v_addr;
2065         len = priv->ucode_boot.len;
2066         rc = iwl3945_verify_inst_sparse(priv, image, len);
2067         if (rc == 0) {
2068                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2069                 return 0;
2070         }
2071
2072         /* Try initialize */
2073         image = (__le32 *)priv->ucode_init.v_addr;
2074         len = priv->ucode_init.len;
2075         rc = iwl3945_verify_inst_sparse(priv, image, len);
2076         if (rc == 0) {
2077                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2078                 return 0;
2079         }
2080
2081         /* Try runtime/protocol */
2082         image = (__le32 *)priv->ucode_code.v_addr;
2083         len = priv->ucode_code.len;
2084         rc = iwl3945_verify_inst_sparse(priv, image, len);
2085         if (rc == 0) {
2086                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2087                 return 0;
2088         }
2089
2090         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2091
2092         /* Since nothing seems to match, show first several data entries in
2093          * instruction SRAM, so maybe visual inspection will give a clue.
2094          * Selection of bootstrap image (vs. other images) is arbitrary. */
2095         image = (__le32 *)priv->ucode_boot.v_addr;
2096         len = priv->ucode_boot.len;
2097         rc = iwl3945_verify_inst_full(priv, image, len);
2098
2099         return rc;
2100 }
2101
2102 static void iwl3945_nic_start(struct iwl_priv *priv)
2103 {
2104         /* Remove all resets to allow NIC to operate */
2105         iwl_write32(priv, CSR_RESET, 0);
2106 }
2107
2108 #define IWL3945_UCODE_GET(item)                                         \
2109 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2110 {                                                                       \
2111         return le32_to_cpu(ucode->u.v1.item);                           \
2112 }
2113
2114 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2115 {
2116         return 24;
2117 }
2118
2119 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2120 {
2121         return (u8 *) ucode->u.v1.data;
2122 }
2123
2124 IWL3945_UCODE_GET(inst_size);
2125 IWL3945_UCODE_GET(data_size);
2126 IWL3945_UCODE_GET(init_size);
2127 IWL3945_UCODE_GET(init_data_size);
2128 IWL3945_UCODE_GET(boot_size);
2129
2130 /**
2131  * iwl3945_read_ucode - Read uCode images from disk file.
2132  *
2133  * Copy into buffers for card to fetch via bus-mastering
2134  */
2135 static int iwl3945_read_ucode(struct iwl_priv *priv)
2136 {
2137         const struct iwl_ucode_header *ucode;
2138         int ret = -EINVAL, index;
2139         const struct firmware *ucode_raw;
2140         /* firmware file name contains uCode/driver compatibility version */
2141         const char *name_pre = priv->cfg->fw_name_pre;
2142         const unsigned int api_max = priv->cfg->ucode_api_max;
2143         const unsigned int api_min = priv->cfg->ucode_api_min;
2144         char buf[25];
2145         u8 *src;
2146         size_t len;
2147         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2148
2149         /* Ask kernel firmware_class module to get the boot firmware off disk.
2150          * request_firmware() is synchronous, file is in memory on return. */
2151         for (index = api_max; index >= api_min; index--) {
2152                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2153                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2154                 if (ret < 0) {
2155                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2156                                   buf, ret);
2157                         if (ret == -ENOENT)
2158                                 continue;
2159                         else
2160                                 goto error;
2161                 } else {
2162                         if (index < api_max)
2163                                 IWL_ERR(priv, "Loaded firmware %s, "
2164                                         "which is deprecated. "
2165                                         " Please use API v%u instead.\n",
2166                                           buf, api_max);
2167                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2168                                        "(%zd bytes) from disk\n",
2169                                        buf, ucode_raw->size);
2170                         break;
2171                 }
2172         }
2173
2174         if (ret < 0)
2175                 goto error;
2176
2177         /* Make sure that we got at least our header! */
2178         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2179                 IWL_ERR(priv, "File size way too small!\n");
2180                 ret = -EINVAL;
2181                 goto err_release;
2182         }
2183
2184         /* Data from ucode file:  header followed by uCode images */
2185         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2186
2187         priv->ucode_ver = le32_to_cpu(ucode->ver);
2188         api_ver = IWL_UCODE_API(priv->ucode_ver);
2189         inst_size = iwl3945_ucode_get_inst_size(ucode);
2190         data_size = iwl3945_ucode_get_data_size(ucode);
2191         init_size = iwl3945_ucode_get_init_size(ucode);
2192         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2193         boot_size = iwl3945_ucode_get_boot_size(ucode);
2194         src = iwl3945_ucode_get_data(ucode);
2195
2196         /* api_ver should match the api version forming part of the
2197          * firmware filename ... but we don't check for that and only rely
2198          * on the API version read from firmware header from here on forward */
2199
2200         if (api_ver < api_min || api_ver > api_max) {
2201                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2202                           "Driver supports v%u, firmware is v%u.\n",
2203                           api_max, api_ver);
2204                 priv->ucode_ver = 0;
2205                 ret = -EINVAL;
2206                 goto err_release;
2207         }
2208         if (api_ver != api_max)
2209                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2210                           "got %u. New firmware can be obtained "
2211                           "from http://www.intellinuxwireless.org.\n",
2212                           api_max, api_ver);
2213
2214         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2215                 IWL_UCODE_MAJOR(priv->ucode_ver),
2216                 IWL_UCODE_MINOR(priv->ucode_ver),
2217                 IWL_UCODE_API(priv->ucode_ver),
2218                 IWL_UCODE_SERIAL(priv->ucode_ver));
2219
2220         snprintf(priv->hw->wiphy->fw_version,
2221                  sizeof(priv->hw->wiphy->fw_version),
2222                  "%u.%u.%u.%u",
2223                  IWL_UCODE_MAJOR(priv->ucode_ver),
2224                  IWL_UCODE_MINOR(priv->ucode_ver),
2225                  IWL_UCODE_API(priv->ucode_ver),
2226                  IWL_UCODE_SERIAL(priv->ucode_ver));
2227
2228         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2229                        priv->ucode_ver);
2230         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2231                        inst_size);
2232         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2233                        data_size);
2234         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2235                        init_size);
2236         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2237                        init_data_size);
2238         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2239                        boot_size);
2240
2241
2242         /* Verify size of file vs. image size info in file's header */
2243         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2244                 inst_size + data_size + init_size +
2245                 init_data_size + boot_size) {
2246
2247                 IWL_DEBUG_INFO(priv,
2248                         "uCode file size %zd does not match expected size\n",
2249                         ucode_raw->size);
2250                 ret = -EINVAL;
2251                 goto err_release;
2252         }
2253
2254         /* Verify that uCode images will fit in card's SRAM */
2255         if (inst_size > IWL39_MAX_INST_SIZE) {
2256                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2257                                inst_size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261
2262         if (data_size > IWL39_MAX_DATA_SIZE) {
2263                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2264                                data_size);
2265                 ret = -EINVAL;
2266                 goto err_release;
2267         }
2268         if (init_size > IWL39_MAX_INST_SIZE) {
2269                 IWL_DEBUG_INFO(priv,
2270                                 "uCode init instr len %d too large to fit in\n",
2271                                 init_size);
2272                 ret = -EINVAL;
2273                 goto err_release;
2274         }
2275         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2276                 IWL_DEBUG_INFO(priv,
2277                                 "uCode init data len %d too large to fit in\n",
2278                                 init_data_size);
2279                 ret = -EINVAL;
2280                 goto err_release;
2281         }
2282         if (boot_size > IWL39_MAX_BSM_SIZE) {
2283                 IWL_DEBUG_INFO(priv,
2284                                 "uCode boot instr len %d too large to fit in\n",
2285                                 boot_size);
2286                 ret = -EINVAL;
2287                 goto err_release;
2288         }
2289
2290         /* Allocate ucode buffers for card's bus-master loading ... */
2291
2292         /* Runtime instructions and 2 copies of data:
2293          * 1) unmodified from disk
2294          * 2) backup cache for save/restore during power-downs */
2295         priv->ucode_code.len = inst_size;
2296         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2297
2298         priv->ucode_data.len = data_size;
2299         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2300
2301         priv->ucode_data_backup.len = data_size;
2302         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2303
2304         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2305             !priv->ucode_data_backup.v_addr)
2306                 goto err_pci_alloc;
2307
2308         /* Initialization instructions and data */
2309         if (init_size && init_data_size) {
2310                 priv->ucode_init.len = init_size;
2311                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2312
2313                 priv->ucode_init_data.len = init_data_size;
2314                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2315
2316                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2317                         goto err_pci_alloc;
2318         }
2319
2320         /* Bootstrap (instructions only, no data) */
2321         if (boot_size) {
2322                 priv->ucode_boot.len = boot_size;
2323                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2324
2325                 if (!priv->ucode_boot.v_addr)
2326                         goto err_pci_alloc;
2327         }
2328
2329         /* Copy images into buffers for card's bus-master reads ... */
2330
2331         /* Runtime instructions (first block of data in file) */
2332         len = inst_size;
2333         IWL_DEBUG_INFO(priv,
2334                 "Copying (but not loading) uCode instr len %zd\n", len);
2335         memcpy(priv->ucode_code.v_addr, src, len);
2336         src += len;
2337
2338         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2339                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2340
2341         /* Runtime data (2nd block)
2342          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2343         len = data_size;
2344         IWL_DEBUG_INFO(priv,
2345                 "Copying (but not loading) uCode data len %zd\n", len);
2346         memcpy(priv->ucode_data.v_addr, src, len);
2347         memcpy(priv->ucode_data_backup.v_addr, src, len);
2348         src += len;
2349
2350         /* Initialization instructions (3rd block) */
2351         if (init_size) {
2352                 len = init_size;
2353                 IWL_DEBUG_INFO(priv,
2354                         "Copying (but not loading) init instr len %zd\n", len);
2355                 memcpy(priv->ucode_init.v_addr, src, len);
2356                 src += len;
2357         }
2358
2359         /* Initialization data (4th block) */
2360         if (init_data_size) {
2361                 len = init_data_size;
2362                 IWL_DEBUG_INFO(priv,
2363                         "Copying (but not loading) init data len %zd\n", len);
2364                 memcpy(priv->ucode_init_data.v_addr, src, len);
2365                 src += len;
2366         }
2367
2368         /* Bootstrap instructions (5th block) */
2369         len = boot_size;
2370         IWL_DEBUG_INFO(priv,
2371                 "Copying (but not loading) boot instr len %zd\n", len);
2372         memcpy(priv->ucode_boot.v_addr, src, len);
2373
2374         /* We have our copies now, allow OS release its copies */
2375         release_firmware(ucode_raw);
2376         return 0;
2377
2378  err_pci_alloc:
2379         IWL_ERR(priv, "failed to allocate pci memory\n");
2380         ret = -ENOMEM;
2381         iwl3945_dealloc_ucode_pci(priv);
2382
2383  err_release:
2384         release_firmware(ucode_raw);
2385
2386  error:
2387         return ret;
2388 }
2389
2390
2391 /**
2392  * iwl3945_set_ucode_ptrs - Set uCode address location
2393  *
2394  * Tell initialization uCode where to find runtime uCode.
2395  *
2396  * BSM registers initially contain pointers to initialization uCode.
2397  * We need to replace them to load runtime uCode inst and data,
2398  * and to save runtime data when powering down.
2399  */
2400 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2401 {
2402         dma_addr_t pinst;
2403         dma_addr_t pdata;
2404
2405         /* bits 31:0 for 3945 */
2406         pinst = priv->ucode_code.p_addr;
2407         pdata = priv->ucode_data_backup.p_addr;
2408
2409         /* Tell bootstrap uCode where to find image to load */
2410         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2411         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2412         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2413                                  priv->ucode_data.len);
2414
2415         /* Inst byte count must be last to set up, bit 31 signals uCode
2416          *   that all new ptr/size info is in place */
2417         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2418                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2419
2420         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2421
2422         return 0;
2423 }
2424
2425 /**
2426  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2427  *
2428  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2429  *
2430  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2431  */
2432 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2433 {
2434         /* Check alive response for "valid" sign from uCode */
2435         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2436                 /* We had an error bringing up the hardware, so take it
2437                  * all the way back down so we can try again */
2438                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2439                 goto restart;
2440         }
2441
2442         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2443          * This is a paranoid check, because we would not have gotten the
2444          * "initialize" alive if code weren't properly loaded.  */
2445         if (iwl3945_verify_ucode(priv)) {
2446                 /* Runtime instruction load was bad;
2447                  * take it all the way back down so we can try again */
2448                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2449                 goto restart;
2450         }
2451
2452         /* Send pointers to protocol/runtime uCode image ... init code will
2453          * load and launch runtime uCode, which will send us another "Alive"
2454          * notification. */
2455         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2456         if (iwl3945_set_ucode_ptrs(priv)) {
2457                 /* Runtime instruction load won't happen;
2458                  * take it all the way back down so we can try again */
2459                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2460                 goto restart;
2461         }
2462         return;
2463
2464  restart:
2465         queue_work(priv->workqueue, &priv->restart);
2466 }
2467
2468 /**
2469  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2470  *                   from protocol/runtime uCode (initialization uCode's
2471  *                   Alive gets handled by iwl3945_init_alive_start()).
2472  */
2473 static void iwl3945_alive_start(struct iwl_priv *priv)
2474 {
2475         int thermal_spin = 0;
2476         u32 rfkill;
2477         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2478
2479         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2480
2481         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2482                 /* We had an error bringing up the hardware, so take it
2483                  * all the way back down so we can try again */
2484                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2485                 goto restart;
2486         }
2487
2488         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2489          * This is a paranoid check, because we would not have gotten the
2490          * "runtime" alive if code weren't properly loaded.  */
2491         if (iwl3945_verify_ucode(priv)) {
2492                 /* Runtime instruction load was bad;
2493                  * take it all the way back down so we can try again */
2494                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2495                 goto restart;
2496         }
2497
2498         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2499         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2500
2501         if (rfkill & 0x1) {
2502                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2503                 /* if RFKILL is not on, then wait for thermal
2504                  * sensor in adapter to kick in */
2505                 while (iwl3945_hw_get_temperature(priv) == 0) {
2506                         thermal_spin++;
2507                         udelay(10);
2508                 }
2509
2510                 if (thermal_spin)
2511                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2512                                        thermal_spin * 10);
2513         } else
2514                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2515
2516         /* After the ALIVE response, we can send commands to 3945 uCode */
2517         set_bit(STATUS_ALIVE, &priv->status);
2518
2519         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2520                 /* Enable timer to monitor the driver queues */
2521                 mod_timer(&priv->monitor_recover,
2522                         jiffies +
2523                         msecs_to_jiffies(
2524                           priv->cfg->base_params->monitor_recover_period));
2525         }
2526
2527         if (iwl_is_rfkill(priv))
2528                 return;
2529
2530         ieee80211_wake_queues(priv->hw);
2531
2532         priv->active_rate = IWL_RATES_MASK;
2533
2534         iwl_power_update_mode(priv, true);
2535
2536         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS)) {
2537                 struct iwl3945_rxon_cmd *active_rxon =
2538                                 (struct iwl3945_rxon_cmd *)(&ctx->active);
2539
2540                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2541                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2542         } else {
2543                 /* Initialize our rx_config data */
2544                 iwl_connection_init_rx_config(priv, ctx);
2545         }
2546
2547         /* Configure Bluetooth device coexistence support */
2548         priv->cfg->ops->hcmd->send_bt_config(priv);
2549
2550         /* Configure the adapter for unassociated operation */
2551         iwl3945_commit_rxon(priv, ctx);
2552
2553         iwl3945_reg_txpower_periodic(priv);
2554
2555         iwl_leds_init(priv);
2556
2557         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2558         set_bit(STATUS_READY, &priv->status);
2559         wake_up_interruptible(&priv->wait_command_queue);
2560
2561         return;
2562
2563  restart:
2564         queue_work(priv->workqueue, &priv->restart);
2565 }
2566
2567 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2568
2569 static void __iwl3945_down(struct iwl_priv *priv)
2570 {
2571         unsigned long flags;
2572         int exit_pending;
2573
2574         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2575
2576         iwl_scan_cancel_timeout(priv, 200);
2577
2578         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2579
2580         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2581          * to prevent rearm timer */
2582         if (priv->cfg->ops->lib->recover_from_tx_stall)
2583                 del_timer_sync(&priv->monitor_recover);
2584
2585         /* Station information will now be cleared in device */
2586         iwl_clear_ucode_stations(priv, NULL);
2587         iwl_dealloc_bcast_stations(priv);
2588         iwl_clear_driver_stations(priv);
2589
2590         /* Unblock any waiting calls */
2591         wake_up_interruptible_all(&priv->wait_command_queue);
2592
2593         /* Wipe out the EXIT_PENDING status bit if we are not actually
2594          * exiting the module */
2595         if (!exit_pending)
2596                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2597
2598         /* stop and reset the on-board processor */
2599         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2600
2601         /* tell the device to stop sending interrupts */
2602         spin_lock_irqsave(&priv->lock, flags);
2603         iwl_disable_interrupts(priv);
2604         spin_unlock_irqrestore(&priv->lock, flags);
2605         iwl_synchronize_irq(priv);
2606
2607         if (priv->mac80211_registered)
2608                 ieee80211_stop_queues(priv->hw);
2609
2610         /* If we have not previously called iwl3945_init() then
2611          * clear all bits but the RF Kill bits and return */
2612         if (!iwl_is_init(priv)) {
2613                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2614                                         STATUS_RF_KILL_HW |
2615                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2616                                         STATUS_GEO_CONFIGURED |
2617                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2618                                         STATUS_EXIT_PENDING;
2619                 goto exit;
2620         }
2621
2622         /* ...otherwise clear out all the status bits but the RF Kill
2623          * bit and continue taking the NIC down. */
2624         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2625                                 STATUS_RF_KILL_HW |
2626                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2627                                 STATUS_GEO_CONFIGURED |
2628                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2629                                 STATUS_FW_ERROR |
2630                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2631                                 STATUS_EXIT_PENDING;
2632
2633         iwl3945_hw_txq_ctx_stop(priv);
2634         iwl3945_hw_rxq_stop(priv);
2635
2636         /* Power-down device's busmaster DMA clocks */
2637         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2638         udelay(5);
2639
2640         /* Stop the device, and put it in low power state */
2641         iwl_apm_stop(priv);
2642
2643  exit:
2644         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2645
2646         if (priv->beacon_skb)
2647                 dev_kfree_skb(priv->beacon_skb);
2648         priv->beacon_skb = NULL;
2649
2650         /* clear out any free frames */
2651         iwl3945_clear_free_frames(priv);
2652 }
2653
2654 static void iwl3945_down(struct iwl_priv *priv)
2655 {
2656         mutex_lock(&priv->mutex);
2657         __iwl3945_down(priv);
2658         mutex_unlock(&priv->mutex);
2659
2660         iwl3945_cancel_deferred_work(priv);
2661 }
2662
2663 #define MAX_HW_RESTARTS 5
2664
2665 static int iwl3945_alloc_bcast_station(struct iwl_priv *priv)
2666 {
2667         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2668         unsigned long flags;
2669         u8 sta_id;
2670
2671         spin_lock_irqsave(&priv->sta_lock, flags);
2672         sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
2673         if (sta_id == IWL_INVALID_STATION) {
2674                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
2675                 spin_unlock_irqrestore(&priv->sta_lock, flags);
2676
2677                 return -EINVAL;
2678         }
2679
2680         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
2681         priv->stations[sta_id].used |= IWL_STA_BCAST;
2682         spin_unlock_irqrestore(&priv->sta_lock, flags);
2683
2684         return 0;
2685 }
2686
2687 static int __iwl3945_up(struct iwl_priv *priv)
2688 {
2689         int rc, i;
2690
2691         rc = iwl3945_alloc_bcast_station(priv);
2692         if (rc)
2693                 return rc;
2694
2695         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2696                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2697                 return -EIO;
2698         }
2699
2700         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2701                 IWL_ERR(priv, "ucode not available for device bring up\n");
2702                 return -EIO;
2703         }
2704
2705         /* If platform's RF_KILL switch is NOT set to KILL */
2706         if (iwl_read32(priv, CSR_GP_CNTRL) &
2707                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2708                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2709         else {
2710                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2711                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2712                 return -ENODEV;
2713         }
2714
2715         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2716
2717         rc = iwl3945_hw_nic_init(priv);
2718         if (rc) {
2719                 IWL_ERR(priv, "Unable to int nic\n");
2720                 return rc;
2721         }
2722
2723         /* make sure rfkill handshake bits are cleared */
2724         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2725         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2726                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2727
2728         /* clear (again), then enable host interrupts */
2729         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2730         iwl_enable_interrupts(priv);
2731
2732         /* really make sure rfkill handshake bits are cleared */
2733         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2734         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2735
2736         /* Copy original ucode data image from disk into backup cache.
2737          * This will be used to initialize the on-board processor's
2738          * data SRAM for a clean start when the runtime program first loads. */
2739         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2740                priv->ucode_data.len);
2741
2742         /* We return success when we resume from suspend and rf_kill is on. */
2743         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2744                 return 0;
2745
2746         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2747
2748                 /* load bootstrap state machine,
2749                  * load bootstrap program into processor's memory,
2750                  * prepare to load the "initialize" uCode */
2751                 rc = priv->cfg->ops->lib->load_ucode(priv);
2752
2753                 if (rc) {
2754                         IWL_ERR(priv,
2755                                 "Unable to set up bootstrap uCode: %d\n", rc);
2756                         continue;
2757                 }
2758
2759                 /* start card; "initialize" will load runtime ucode */
2760                 iwl3945_nic_start(priv);
2761
2762                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2763
2764                 return 0;
2765         }
2766
2767         set_bit(STATUS_EXIT_PENDING, &priv->status);
2768         __iwl3945_down(priv);
2769         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2770
2771         /* tried to restart and config the device for as long as our
2772          * patience could withstand */
2773         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2774         return -EIO;
2775 }
2776
2777
2778 /*****************************************************************************
2779  *
2780  * Workqueue callbacks
2781  *
2782  *****************************************************************************/
2783
2784 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2785 {
2786         struct iwl_priv *priv =
2787             container_of(data, struct iwl_priv, init_alive_start.work);
2788
2789         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2790                 return;
2791
2792         mutex_lock(&priv->mutex);
2793         iwl3945_init_alive_start(priv);
2794         mutex_unlock(&priv->mutex);
2795 }
2796
2797 static void iwl3945_bg_alive_start(struct work_struct *data)
2798 {
2799         struct iwl_priv *priv =
2800             container_of(data, struct iwl_priv, alive_start.work);
2801
2802         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2803                 return;
2804
2805         mutex_lock(&priv->mutex);
2806         iwl3945_alive_start(priv);
2807         mutex_unlock(&priv->mutex);
2808 }
2809
2810 /*
2811  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2812  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2813  * *is* readable even when device has been SW_RESET into low power mode
2814  * (e.g. during RF KILL).
2815  */
2816 static void iwl3945_rfkill_poll(struct work_struct *data)
2817 {
2818         struct iwl_priv *priv =
2819             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2820         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2821         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2822                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2823
2824         if (new_rfkill != old_rfkill) {
2825                 if (new_rfkill)
2826                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2827                 else
2828                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2829
2830                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2831
2832                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2833                                 new_rfkill ? "disable radio" : "enable radio");
2834         }
2835
2836         /* Keep this running, even if radio now enabled.  This will be
2837          * cancelled in mac_start() if system decides to start again */
2838         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2839                            round_jiffies_relative(2 * HZ));
2840
2841 }
2842
2843 int iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2844 {
2845         struct iwl_host_cmd cmd = {
2846                 .id = REPLY_SCAN_CMD,
2847                 .len = sizeof(struct iwl3945_scan_cmd),
2848                 .flags = CMD_SIZE_HUGE,
2849         };
2850         struct iwl3945_scan_cmd *scan;
2851         u8 n_probes = 0;
2852         enum ieee80211_band band;
2853         bool is_active = false;
2854         int ret;
2855
2856         lockdep_assert_held(&priv->mutex);
2857
2858         if (!priv->scan_cmd) {
2859                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2860                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2861                 if (!priv->scan_cmd) {
2862                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2863                         return -ENOMEM;
2864                 }
2865         }
2866         scan = priv->scan_cmd;
2867         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2868
2869         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2870         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2871
2872         if (iwl_is_associated(priv, IWL_RXON_CTX_BSS)) {
2873                 u16 interval = 0;
2874                 u32 extra;
2875                 u32 suspend_time = 100;
2876                 u32 scan_suspend_time = 100;
2877                 unsigned long flags;
2878
2879                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2880
2881                 spin_lock_irqsave(&priv->lock, flags);
2882                 if (priv->is_internal_short_scan)
2883                         interval = 0;
2884                 else
2885                         interval = vif->bss_conf.beacon_int;
2886                 spin_unlock_irqrestore(&priv->lock, flags);
2887
2888                 scan->suspend_time = 0;
2889                 scan->max_out_time = cpu_to_le32(200 * 1024);
2890                 if (!interval)
2891                         interval = suspend_time;
2892                 /*
2893                  * suspend time format:
2894                  *  0-19: beacon interval in usec (time before exec.)
2895                  * 20-23: 0
2896                  * 24-31: number of beacons (suspend between channels)
2897                  */
2898
2899                 extra = (suspend_time / interval) << 24;
2900                 scan_suspend_time = 0xFF0FFFFF &
2901                     (extra | ((suspend_time % interval) * 1024));
2902
2903                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2904                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2905                                scan_suspend_time, interval);
2906         }
2907
2908         if (priv->is_internal_short_scan) {
2909                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2910         } else if (priv->scan_request->n_ssids) {
2911                 int i, p = 0;
2912                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2913                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2914                         /* always does wildcard anyway */
2915                         if (!priv->scan_request->ssids[i].ssid_len)
2916                                 continue;
2917                         scan->direct_scan[p].id = WLAN_EID_SSID;
2918                         scan->direct_scan[p].len =
2919                                 priv->scan_request->ssids[i].ssid_len;
2920                         memcpy(scan->direct_scan[p].ssid,
2921                                priv->scan_request->ssids[i].ssid,
2922                                priv->scan_request->ssids[i].ssid_len);
2923                         n_probes++;
2924                         p++;
2925                 }
2926                 is_active = true;
2927         } else
2928                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2929
2930         /* We don't build a direct scan probe request; the uCode will do
2931          * that based on the direct_mask added to each channel entry */
2932         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2933         scan->tx_cmd.sta_id = priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
2934         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2935
2936         /* flags + rate selection */
2937
2938         switch (priv->scan_band) {
2939         case IEEE80211_BAND_2GHZ:
2940                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2941                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2942                 band = IEEE80211_BAND_2GHZ;
2943                 break;
2944         case IEEE80211_BAND_5GHZ:
2945                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2946                 band = IEEE80211_BAND_5GHZ;
2947                 break;
2948         default:
2949                 IWL_WARN(priv, "Invalid scan band\n");
2950                 return -EIO;
2951         }
2952
2953         /*
2954          * If active scaning is requested but a certain channel
2955          * is marked passive, we can do active scanning if we
2956          * detect transmissions.
2957          */
2958         scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2959                                         IWL_GOOD_CRC_TH_DISABLED;
2960
2961         if (!priv->is_internal_short_scan) {
2962                 scan->tx_cmd.len = cpu_to_le16(
2963                         iwl_fill_probe_req(priv,
2964                                 (struct ieee80211_mgmt *)scan->data,
2965                                 vif->addr,
2966                                 priv->scan_request->ie,
2967                                 priv->scan_request->ie_len,
2968                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2969         } else {
2970                 /* use bcast addr, will not be transmitted but must be valid */
2971                 scan->tx_cmd.len = cpu_to_le16(
2972                         iwl_fill_probe_req(priv,
2973                                 (struct ieee80211_mgmt *)scan->data,
2974                                 iwl_bcast_addr, NULL, 0,
2975                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2976         }
2977         /* select Rx antennas */
2978         scan->flags |= iwl3945_get_antenna_flags(priv);
2979
2980         if (priv->is_internal_short_scan) {
2981                 scan->channel_count =
2982                         iwl3945_get_single_channel_for_scan(priv, vif, band,
2983                                 (void *)&scan->data[le16_to_cpu(
2984                                 scan->tx_cmd.len)]);
2985         } else {
2986                 scan->channel_count =
2987                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2988                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2989         }
2990
2991         if (scan->channel_count == 0) {
2992                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2993                 return -EIO;
2994         }
2995
2996         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2997             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2998         cmd.data = scan;
2999         scan->len = cpu_to_le16(cmd.len);
3000
3001         set_bit(STATUS_SCAN_HW, &priv->status);
3002         ret = iwl_send_cmd_sync(priv, &cmd);
3003         if (ret)
3004                 clear_bit(STATUS_SCAN_HW, &priv->status);
3005         return ret;
3006 }
3007
3008 void iwl3945_post_scan(struct iwl_priv *priv)
3009 {
3010         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3011
3012         /*
3013          * Since setting the RXON may have been deferred while
3014          * performing the scan, fire one off if needed
3015          */
3016         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
3017                 iwl3945_commit_rxon(priv, ctx);
3018 }
3019
3020 static void iwl3945_bg_restart(struct work_struct *data)
3021 {
3022         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3023
3024         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3025                 return;
3026
3027         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3028                 struct iwl_rxon_context *ctx;
3029                 mutex_lock(&priv->mutex);
3030                 for_each_context(priv, ctx)
3031                         ctx->vif = NULL;
3032                 priv->is_open = 0;
3033                 mutex_unlock(&priv->mutex);
3034                 iwl3945_down(priv);
3035                 ieee80211_restart_hw(priv->hw);
3036         } else {
3037                 iwl3945_down(priv);
3038
3039                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3040                         return;
3041
3042                 mutex_lock(&priv->mutex);
3043                 __iwl3945_up(priv);
3044                 mutex_unlock(&priv->mutex);
3045         }
3046 }
3047
3048 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3049 {
3050         struct iwl_priv *priv =
3051             container_of(data, struct iwl_priv, rx_replenish);
3052
3053         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3054                 return;
3055
3056         mutex_lock(&priv->mutex);
3057         iwl3945_rx_replenish(priv);
3058         mutex_unlock(&priv->mutex);
3059 }
3060
3061 void iwl3945_post_associate(struct iwl_priv *priv)
3062 {
3063         int rc = 0;
3064         struct ieee80211_conf *conf = NULL;
3065         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3066
3067         if (!ctx->vif || !priv->is_open)
3068                 return;
3069
3070         if (ctx->vif->type == NL80211_IFTYPE_AP) {
3071                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3072                 return;
3073         }
3074
3075         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3076                         ctx->vif->bss_conf.aid, ctx->active.bssid_addr);
3077
3078         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3079                 return;
3080
3081         iwl_scan_cancel_timeout(priv, 200);
3082
3083         conf = ieee80211_get_hw_conf(priv->hw);
3084
3085         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3086         iwl3945_commit_rxon(priv, ctx);
3087
3088         rc = iwl_send_rxon_timing(priv, ctx);
3089         if (rc)
3090                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3091                             "Attempting to continue.\n");
3092
3093         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3094
3095         ctx->staging.assoc_id = cpu_to_le16(ctx->vif->bss_conf.aid);
3096
3097         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3098                         ctx->vif->bss_conf.aid, ctx->vif->bss_conf.beacon_int);
3099
3100         if (ctx->vif->bss_conf.use_short_preamble)
3101                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3102         else
3103                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3104
3105         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3106                 if (ctx->vif->bss_conf.use_short_slot)
3107                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3108                 else
3109                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3110         }
3111
3112         iwl3945_commit_rxon(priv, ctx);
3113
3114         switch (ctx->vif->type) {
3115         case NL80211_IFTYPE_STATION:
3116                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3117                 break;
3118         case NL80211_IFTYPE_ADHOC:
3119                 iwl3945_send_beacon_cmd(priv);
3120                 break;
3121         default:
3122                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3123                         __func__, ctx->vif->type);
3124                 break;
3125         }
3126 }
3127
3128 /*****************************************************************************
3129  *
3130  * mac80211 entry point functions
3131  *
3132  *****************************************************************************/
3133
3134 #define UCODE_READY_TIMEOUT     (2 * HZ)
3135
3136 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3137 {
3138         struct iwl_priv *priv = hw->priv;
3139         int ret;
3140
3141         IWL_DEBUG_MAC80211(priv, "enter\n");
3142
3143         /* we should be verifying the device is ready to be opened */
3144         mutex_lock(&priv->mutex);
3145
3146         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3147          * ucode filename and max sizes are card-specific. */
3148
3149         if (!priv->ucode_code.len) {
3150                 ret = iwl3945_read_ucode(priv);
3151                 if (ret) {
3152                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3153                         mutex_unlock(&priv->mutex);
3154                         goto out_release_irq;
3155                 }
3156         }
3157
3158         ret = __iwl3945_up(priv);
3159
3160         mutex_unlock(&priv->mutex);
3161
3162         if (ret)
3163                 goto out_release_irq;
3164
3165         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3166
3167         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3168          * mac80211 will not be run successfully. */
3169         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3170                         test_bit(STATUS_READY, &priv->status),
3171                         UCODE_READY_TIMEOUT);
3172         if (!ret) {
3173                 if (!test_bit(STATUS_READY, &priv->status)) {
3174                         IWL_ERR(priv,
3175                                 "Wait for START_ALIVE timeout after %dms.\n",
3176                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3177                         ret = -ETIMEDOUT;
3178                         goto out_release_irq;
3179                 }
3180         }
3181
3182         /* ucode is running and will send rfkill notifications,
3183          * no need to poll the killswitch state anymore */
3184         cancel_delayed_work(&priv->_3945.rfkill_poll);
3185
3186         iwl_led_start(priv);
3187
3188         priv->is_open = 1;
3189         IWL_DEBUG_MAC80211(priv, "leave\n");
3190         return 0;
3191
3192 out_release_irq:
3193         priv->is_open = 0;
3194         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3195         return ret;
3196 }
3197
3198 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3199 {
3200         struct iwl_priv *priv = hw->priv;
3201
3202         IWL_DEBUG_MAC80211(priv, "enter\n");
3203
3204         if (!priv->is_open) {
3205                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3206                 return;
3207         }
3208
3209         priv->is_open = 0;
3210
3211         iwl3945_down(priv);
3212
3213         flush_workqueue(priv->workqueue);
3214
3215         /* start polling the killswitch state again */
3216         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3217                            round_jiffies_relative(2 * HZ));
3218
3219         IWL_DEBUG_MAC80211(priv, "leave\n");
3220 }
3221
3222 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3223 {
3224         struct iwl_priv *priv = hw->priv;
3225
3226         IWL_DEBUG_MAC80211(priv, "enter\n");
3227
3228         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3229                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3230
3231         if (iwl3945_tx_skb(priv, skb))
3232                 dev_kfree_skb_any(skb);
3233
3234         IWL_DEBUG_MAC80211(priv, "leave\n");
3235         return NETDEV_TX_OK;
3236 }
3237
3238 void iwl3945_config_ap(struct iwl_priv *priv)
3239 {
3240         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3241         struct ieee80211_vif *vif = ctx->vif;
3242         int rc = 0;
3243
3244         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3245                 return;
3246
3247         /* The following should be done only at AP bring up */
3248         if (!(iwl_is_associated(priv, IWL_RXON_CTX_BSS))) {
3249
3250                 /* RXON - unassoc (to set timing command) */
3251                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3252                 iwl3945_commit_rxon(priv, ctx);
3253
3254                 /* RXON Timing */
3255                 rc = iwl_send_rxon_timing(priv, ctx);
3256                 if (rc)
3257                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3258                                         "Attempting to continue.\n");
3259
3260                 ctx->staging.assoc_id = 0;
3261
3262                 if (vif->bss_conf.use_short_preamble)
3263                         ctx->staging.flags |=
3264                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3265                 else
3266                         ctx->staging.flags &=
3267                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3268
3269                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3270                         if (vif->bss_conf.use_short_slot)
3271                                 ctx->staging.flags |=
3272                                         RXON_FLG_SHORT_SLOT_MSK;
3273                         else
3274                                 ctx->staging.flags &=
3275                                         ~RXON_FLG_SHORT_SLOT_MSK;
3276                 }
3277                 /* restore RXON assoc */
3278                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3279                 iwl3945_commit_rxon(priv, ctx);
3280         }
3281         iwl3945_send_beacon_cmd(priv);
3282
3283         /* FIXME - we need to add code here to detect a totally new
3284          * configuration, reset the AP, unassoc, rxon timing, assoc,
3285          * clear sta table, add BCAST sta... */
3286 }
3287
3288 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3289                                struct ieee80211_vif *vif,
3290                                struct ieee80211_sta *sta,
3291                                struct ieee80211_key_conf *key)
3292 {
3293         struct iwl_priv *priv = hw->priv;
3294         int ret = 0;
3295         u8 sta_id = IWL_INVALID_STATION;
3296         u8 static_key;
3297
3298         IWL_DEBUG_MAC80211(priv, "enter\n");
3299
3300         if (iwl3945_mod_params.sw_crypto) {
3301                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3302                 return -EOPNOTSUPP;
3303         }
3304
3305         static_key = !iwl_is_associated(priv, IWL_RXON_CTX_BSS);
3306
3307         if (!static_key) {
3308                 sta_id = iwl_sta_id_or_broadcast(
3309                                 priv, &priv->contexts[IWL_RXON_CTX_BSS], sta);
3310                 if (sta_id == IWL_INVALID_STATION)
3311                         return -EINVAL;
3312         }
3313
3314         mutex_lock(&priv->mutex);
3315         iwl_scan_cancel_timeout(priv, 100);
3316
3317         switch (cmd) {
3318         case SET_KEY:
3319                 if (static_key)
3320                         ret = iwl3945_set_static_key(priv, key);
3321                 else
3322                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3323                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3324                 break;
3325         case DISABLE_KEY:
3326                 if (static_key)
3327                         ret = iwl3945_remove_static_key(priv);
3328                 else
3329                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3330                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3331                 break;
3332         default:
3333                 ret = -EINVAL;
3334         }
3335
3336         mutex_unlock(&priv->mutex);
3337         IWL_DEBUG_MAC80211(priv, "leave\n");
3338
3339         return ret;
3340 }
3341
3342 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3343                                struct ieee80211_vif *vif,
3344                                struct ieee80211_sta *sta)
3345 {
3346         struct iwl_priv *priv = hw->priv;
3347         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3348         int ret;
3349         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3350         u8 sta_id;
3351
3352         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3353                         sta->addr);
3354         mutex_lock(&priv->mutex);
3355         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
3356                         sta->addr);
3357         sta_priv->common.sta_id = IWL_INVALID_STATION;
3358
3359
3360         ret = iwl_add_station_common(priv, &priv->contexts[IWL_RXON_CTX_BSS],
3361                                      sta->addr, is_ap, sta, &sta_id);
3362         if (ret) {
3363                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3364                         sta->addr, ret);
3365                 /* Should we return success if return code is EEXIST ? */
3366                 mutex_unlock(&priv->mutex);
3367                 return ret;
3368         }
3369
3370         sta_priv->common.sta_id = sta_id;
3371
3372         /* Initialize rate scaling */
3373         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3374                        sta->addr);
3375         iwl3945_rs_rate_init(priv, sta, sta_id);
3376         mutex_unlock(&priv->mutex);
3377
3378         return 0;
3379 }
3380
3381 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
3382                                      unsigned int changed_flags,
3383                                      unsigned int *total_flags,
3384                                      u64 multicast)
3385 {
3386         struct iwl_priv *priv = hw->priv;
3387         __le32 filter_or = 0, filter_nand = 0;
3388         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3389
3390 #define CHK(test, flag) do { \
3391         if (*total_flags & (test))              \
3392                 filter_or |= (flag);            \
3393         else                                    \
3394                 filter_nand |= (flag);          \
3395         } while (0)
3396
3397         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3398                         changed_flags, *total_flags);
3399
3400         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3401         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3402         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3403
3404 #undef CHK
3405
3406         mutex_lock(&priv->mutex);
3407
3408         ctx->staging.filter_flags &= ~filter_nand;
3409         ctx->staging.filter_flags |= filter_or;
3410
3411         /*
3412          * Not committing directly because hardware can perform a scan,
3413          * but even if hw is ready, committing here breaks for some reason,
3414          * we'll eventually commit the filter flags change anyway.
3415          */
3416
3417         mutex_unlock(&priv->mutex);
3418
3419         /*
3420          * Receiving all multicast frames is always enabled by the
3421          * default flags setup in iwl_connection_init_rx_config()
3422          * since we currently do not support programming multicast
3423          * filters into the device.
3424          */
3425         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3426                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3427 }
3428
3429
3430 /*****************************************************************************
3431  *
3432  * sysfs attributes
3433  *
3434  *****************************************************************************/
3435
3436 #ifdef CONFIG_IWLWIFI_DEBUG
3437
3438 /*
3439  * The following adds a new attribute to the sysfs representation
3440  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3441  * used for controlling the debug level.
3442  *
3443  * See the level definitions in iwl for details.
3444  *
3445  * The debug_level being managed using sysfs below is a per device debug
3446  * level that is used instead of the global debug level if it (the per
3447  * device debug level) is set.
3448  */
3449 static ssize_t show_debug_level(struct device *d,
3450                                 struct device_attribute *attr, char *buf)
3451 {
3452         struct iwl_priv *priv = dev_get_drvdata(d);
3453         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3454 }
3455 static ssize_t store_debug_level(struct device *d,
3456                                 struct device_attribute *attr,
3457                                  const char *buf, size_t count)
3458 {
3459         struct iwl_priv *priv = dev_get_drvdata(d);
3460         unsigned long val;
3461         int ret;
3462
3463         ret = strict_strtoul(buf, 0, &val);
3464         if (ret)
3465                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3466         else {
3467                 priv->debug_level = val;
3468                 if (iwl_alloc_traffic_mem(priv))
3469                         IWL_ERR(priv,
3470                                 "Not enough memory to generate traffic log\n");
3471         }
3472         return strnlen(buf, count);
3473 }
3474
3475 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3476                         show_debug_level, store_debug_level);
3477
3478 #endif /* CONFIG_IWLWIFI_DEBUG */
3479
3480 static ssize_t show_temperature(struct device *d,
3481                                 struct device_attribute *attr, char *buf)
3482 {
3483         struct iwl_priv *priv = dev_get_drvdata(d);
3484
3485         if (!iwl_is_alive(priv))
3486                 return -EAGAIN;
3487
3488         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3489 }
3490
3491 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3492
3493 static ssize_t show_tx_power(struct device *d,
3494                              struct device_attribute *attr, char *buf)
3495 {
3496         struct iwl_priv *priv = dev_get_drvdata(d);
3497         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3498 }
3499
3500 static ssize_t store_tx_power(struct device *d,
3501                               struct device_attribute *attr,
3502                               const char *buf, size_t count)
3503 {
3504         struct iwl_priv *priv = dev_get_drvdata(d);
3505         char *p = (char *)buf;
3506         u32 val;
3507
3508         val = simple_strtoul(p, &p, 10);
3509         if (p == buf)
3510                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3511         else
3512                 iwl3945_hw_reg_set_txpower(priv, val);
3513
3514         return count;
3515 }
3516
3517 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3518
3519 static ssize_t show_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", ctx->active.flags);
3526 }
3527
3528 static ssize_t store_flags(struct device *d,
3529                            struct device_attribute *attr,
3530                            const char *buf, size_t count)
3531 {
3532         struct iwl_priv *priv = dev_get_drvdata(d);
3533         u32 flags = simple_strtoul(buf, NULL, 0);
3534         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3535
3536         mutex_lock(&priv->mutex);
3537         if (le32_to_cpu(ctx->staging.flags) != flags) {
3538                 /* Cancel any currently running scans... */
3539                 if (iwl_scan_cancel_timeout(priv, 100))
3540                         IWL_WARN(priv, "Could not cancel scan.\n");
3541                 else {
3542                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3543                                        flags);
3544                         ctx->staging.flags = cpu_to_le32(flags);
3545                         iwl3945_commit_rxon(priv, ctx);
3546                 }
3547         }
3548         mutex_unlock(&priv->mutex);
3549
3550         return count;
3551 }
3552
3553 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3554
3555 static ssize_t show_filter_flags(struct device *d,
3556                                  struct device_attribute *attr, char *buf)
3557 {
3558         struct iwl_priv *priv = dev_get_drvdata(d);
3559         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3560
3561         return sprintf(buf, "0x%04X\n",
3562                 le32_to_cpu(ctx->active.filter_flags));
3563 }
3564
3565 static ssize_t store_filter_flags(struct device *d,
3566                                   struct device_attribute *attr,
3567                                   const char *buf, size_t count)
3568 {
3569         struct iwl_priv *priv = dev_get_drvdata(d);
3570         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3571         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3572
3573         mutex_lock(&priv->mutex);
3574         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3575                 /* Cancel any currently running scans... */
3576                 if (iwl_scan_cancel_timeout(priv, 100))
3577                         IWL_WARN(priv, "Could not cancel scan.\n");
3578                 else {
3579                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3580                                        "0x%04X\n", filter_flags);
3581                         ctx->staging.filter_flags =
3582                                 cpu_to_le32(filter_flags);
3583                         iwl3945_commit_rxon(priv, ctx);
3584                 }
3585         }
3586         mutex_unlock(&priv->mutex);
3587
3588         return count;
3589 }
3590
3591 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3592                    store_filter_flags);
3593
3594 static ssize_t show_measurement(struct device *d,
3595                                 struct device_attribute *attr, char *buf)
3596 {
3597         struct iwl_priv *priv = dev_get_drvdata(d);
3598         struct iwl_spectrum_notification measure_report;
3599         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3600         u8 *data = (u8 *)&measure_report;
3601         unsigned long flags;
3602
3603         spin_lock_irqsave(&priv->lock, flags);
3604         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3605                 spin_unlock_irqrestore(&priv->lock, flags);
3606                 return 0;
3607         }
3608         memcpy(&measure_report, &priv->measure_report, size);
3609         priv->measurement_status = 0;
3610         spin_unlock_irqrestore(&priv->lock, flags);
3611
3612         while (size && (PAGE_SIZE - len)) {
3613                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3614                                    PAGE_SIZE - len, 1);
3615                 len = strlen(buf);
3616                 if (PAGE_SIZE - len)
3617                         buf[len++] = '\n';
3618
3619                 ofs += 16;
3620                 size -= min(size, 16U);
3621         }
3622
3623         return len;
3624 }
3625
3626 static ssize_t store_measurement(struct device *d,
3627                                  struct device_attribute *attr,
3628                                  const char *buf, size_t count)
3629 {
3630         struct iwl_priv *priv = dev_get_drvdata(d);
3631         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3632         struct ieee80211_measurement_params params = {
3633                 .channel = le16_to_cpu(ctx->active.channel),
3634                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3635                 .duration = cpu_to_le16(1),
3636         };
3637         u8 type = IWL_MEASURE_BASIC;
3638         u8 buffer[32];
3639         u8 channel;
3640
3641         if (count) {
3642                 char *p = buffer;
3643                 strncpy(buffer, buf, min(sizeof(buffer), count));
3644                 channel = simple_strtoul(p, NULL, 0);
3645                 if (channel)
3646                         params.channel = channel;
3647
3648                 p = buffer;
3649                 while (*p && *p != ' ')
3650                         p++;
3651                 if (*p)
3652                         type = simple_strtoul(p + 1, NULL, 0);
3653         }
3654
3655         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3656                        "channel %d (for '%s')\n", type, params.channel, buf);
3657         iwl3945_get_measurement(priv, &params, type);
3658
3659         return count;
3660 }
3661
3662 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3663                    show_measurement, store_measurement);
3664
3665 static ssize_t store_retry_rate(struct device *d,
3666                                 struct device_attribute *attr,
3667                                 const char *buf, size_t count)
3668 {
3669         struct iwl_priv *priv = dev_get_drvdata(d);
3670
3671         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3672         if (priv->retry_rate <= 0)
3673                 priv->retry_rate = 1;
3674
3675         return count;
3676 }
3677
3678 static ssize_t show_retry_rate(struct device *d,
3679                                struct device_attribute *attr, char *buf)
3680 {
3681         struct iwl_priv *priv = dev_get_drvdata(d);
3682         return sprintf(buf, "%d", priv->retry_rate);
3683 }
3684
3685 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3686                    store_retry_rate);
3687
3688
3689 static ssize_t show_channels(struct device *d,
3690                              struct device_attribute *attr, char *buf)
3691 {
3692         /* all this shit doesn't belong into sysfs anyway */
3693         return 0;
3694 }
3695
3696 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3697
3698 static ssize_t show_antenna(struct device *d,
3699                             struct device_attribute *attr, char *buf)
3700 {
3701         struct iwl_priv *priv = dev_get_drvdata(d);
3702
3703         if (!iwl_is_alive(priv))
3704                 return -EAGAIN;
3705
3706         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3707 }
3708
3709 static ssize_t store_antenna(struct device *d,
3710                              struct device_attribute *attr,
3711                              const char *buf, size_t count)
3712 {
3713         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3714         int ant;
3715
3716         if (count == 0)
3717                 return 0;
3718
3719         if (sscanf(buf, "%1i", &ant) != 1) {
3720                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3721                 return count;
3722         }
3723
3724         if ((ant >= 0) && (ant <= 2)) {
3725                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3726                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3727         } else
3728                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3729
3730
3731         return count;
3732 }
3733
3734 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3735
3736 static ssize_t show_status(struct device *d,
3737                            struct device_attribute *attr, char *buf)
3738 {
3739         struct iwl_priv *priv = dev_get_drvdata(d);
3740         if (!iwl_is_alive(priv))
3741                 return -EAGAIN;
3742         return sprintf(buf, "0x%08x\n", (int)priv->status);
3743 }
3744
3745 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3746
3747 static ssize_t dump_error_log(struct device *d,
3748                               struct device_attribute *attr,
3749                               const char *buf, size_t count)
3750 {
3751         struct iwl_priv *priv = dev_get_drvdata(d);
3752         char *p = (char *)buf;
3753
3754         if (p[0] == '1')
3755                 iwl3945_dump_nic_error_log(priv);
3756
3757         return strnlen(buf, count);
3758 }
3759
3760 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3761
3762 /*****************************************************************************
3763  *
3764  * driver setup and tear down
3765  *
3766  *****************************************************************************/
3767
3768 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3769 {
3770         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3771
3772         init_waitqueue_head(&priv->wait_command_queue);
3773
3774         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3775         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3776         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3777         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3778         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3779         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3780
3781         iwl_setup_scan_deferred_work(priv);
3782
3783         iwl3945_hw_setup_deferred_work(priv);
3784
3785         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3786                 init_timer(&priv->monitor_recover);
3787                 priv->monitor_recover.data = (unsigned long)priv;
3788                 priv->monitor_recover.function =
3789                         priv->cfg->ops->lib->recover_from_tx_stall;
3790         }
3791
3792         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3793                      iwl3945_irq_tasklet, (unsigned long)priv);
3794 }
3795
3796 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3797 {
3798         iwl3945_hw_cancel_deferred_work(priv);
3799
3800         cancel_delayed_work_sync(&priv->init_alive_start);
3801         cancel_delayed_work(&priv->alive_start);
3802         cancel_work_sync(&priv->beacon_update);
3803
3804         iwl_cancel_scan_deferred_work(priv);
3805 }
3806
3807 static struct attribute *iwl3945_sysfs_entries[] = {
3808         &dev_attr_antenna.attr,
3809         &dev_attr_channels.attr,
3810         &dev_attr_dump_errors.attr,
3811         &dev_attr_flags.attr,
3812         &dev_attr_filter_flags.attr,
3813         &dev_attr_measurement.attr,
3814         &dev_attr_retry_rate.attr,
3815         &dev_attr_status.attr,
3816         &dev_attr_temperature.attr,
3817         &dev_attr_tx_power.attr,
3818 #ifdef CONFIG_IWLWIFI_DEBUG
3819         &dev_attr_debug_level.attr,
3820 #endif
3821         NULL
3822 };
3823
3824 static struct attribute_group iwl3945_attribute_group = {
3825         .name = NULL,           /* put in device directory */
3826         .attrs = iwl3945_sysfs_entries,
3827 };
3828
3829 struct ieee80211_ops iwl3945_hw_ops = {
3830         .tx = iwl3945_mac_tx,
3831         .start = iwl3945_mac_start,
3832         .stop = iwl3945_mac_stop,
3833         .add_interface = iwl_mac_add_interface,
3834         .remove_interface = iwl_mac_remove_interface,
3835         .change_interface = iwl_mac_change_interface,
3836         .config = iwl_legacy_mac_config,
3837         .configure_filter = iwl3945_configure_filter,
3838         .set_key = iwl3945_mac_set_key,
3839         .conf_tx = iwl_mac_conf_tx,
3840         .reset_tsf = iwl_legacy_mac_reset_tsf,
3841         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
3842         .hw_scan = iwl_mac_hw_scan,
3843         .sta_add = iwl3945_mac_sta_add,
3844         .sta_remove = iwl_mac_sta_remove,
3845         .tx_last_beacon = iwl_mac_tx_last_beacon,
3846 };
3847
3848 static int iwl3945_init_drv(struct iwl_priv *priv)
3849 {
3850         int ret;
3851         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3852
3853         priv->retry_rate = 1;
3854         priv->beacon_skb = NULL;
3855
3856         spin_lock_init(&priv->sta_lock);
3857         spin_lock_init(&priv->hcmd_lock);
3858
3859         INIT_LIST_HEAD(&priv->free_frames);
3860
3861         mutex_init(&priv->mutex);
3862         mutex_init(&priv->sync_cmd_mutex);
3863
3864         priv->ieee_channels = NULL;
3865         priv->ieee_rates = NULL;
3866         priv->band = IEEE80211_BAND_2GHZ;
3867
3868         priv->iw_mode = NL80211_IFTYPE_STATION;
3869         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3870
3871         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3872         priv->tx_power_next = IWL_DEFAULT_TX_POWER;
3873
3874         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3875                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3876                          eeprom->version);
3877                 ret = -EINVAL;
3878                 goto err;
3879         }
3880         ret = iwl_init_channel_map(priv);
3881         if (ret) {
3882                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3883                 goto err;
3884         }
3885
3886         /* Set up txpower settings in driver for all channels */
3887         if (iwl3945_txpower_set_from_eeprom(priv)) {
3888                 ret = -EIO;
3889                 goto err_free_channel_map;
3890         }
3891
3892         ret = iwlcore_init_geos(priv);
3893         if (ret) {
3894                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3895                 goto err_free_channel_map;
3896         }
3897         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3898
3899         return 0;
3900
3901 err_free_channel_map:
3902         iwl_free_channel_map(priv);
3903 err:
3904         return ret;
3905 }
3906
3907 #define IWL3945_MAX_PROBE_REQUEST       200
3908
3909 static int iwl3945_setup_mac(struct iwl_priv *priv)
3910 {
3911         int ret;
3912         struct ieee80211_hw *hw = priv->hw;
3913
3914         hw->rate_control_algorithm = "iwl-3945-rs";
3915         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3916         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3917
3918         /* Tell mac80211 our characteristics */
3919         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3920                     IEEE80211_HW_SPECTRUM_MGMT;
3921
3922         if (!priv->cfg->base_params->broken_powersave)
3923                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3924                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3925
3926         hw->wiphy->interface_modes =
3927                 priv->contexts[IWL_RXON_CTX_BSS].interface_modes;
3928
3929         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3930                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3931
3932         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3933         /* we create the 802.11 header and a zero-length SSID element */
3934         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3935
3936         /* Default value; 4 EDCA QOS priorities */
3937         hw->queues = 4;
3938
3939         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3940                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3941                         &priv->bands[IEEE80211_BAND_2GHZ];
3942
3943         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3944                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3945                         &priv->bands[IEEE80211_BAND_5GHZ];
3946
3947         ret = ieee80211_register_hw(priv->hw);
3948         if (ret) {
3949                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3950                 return ret;
3951         }
3952         priv->mac80211_registered = 1;
3953
3954         return 0;
3955 }
3956
3957 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3958 {
3959         int err = 0, i;
3960         struct iwl_priv *priv;
3961         struct ieee80211_hw *hw;
3962         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3963         struct iwl3945_eeprom *eeprom;
3964         unsigned long flags;
3965
3966         /***********************
3967          * 1. Allocating HW data
3968          * ********************/
3969
3970         /* mac80211 allocates memory for this device instance, including
3971          *   space for this driver's private structure */
3972         hw = iwl_alloc_all(cfg);
3973         if (hw == NULL) {
3974                 pr_err("Can not allocate network device\n");
3975                 err = -ENOMEM;
3976                 goto out;
3977         }
3978         priv = hw->priv;
3979         SET_IEEE80211_DEV(hw, &pdev->dev);
3980
3981         priv->cmd_queue = IWL39_CMD_QUEUE_NUM;
3982
3983         /* 3945 has only one valid context */
3984         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3985
3986         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3987                 priv->contexts[i].ctxid = i;
3988
3989         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3990         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3991         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3992         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3993         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3994         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3995         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3996                 BIT(NL80211_IFTYPE_STATION) |
3997                 BIT(NL80211_IFTYPE_ADHOC);
3998         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3999         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
4000         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
4001
4002         /*
4003          * Disabling hardware scan means that mac80211 will perform scans
4004          * "the hard way", rather than using device's scan.
4005          */
4006         if (iwl3945_mod_params.disable_hw_scan) {
4007                 IWL_ERR(priv, "sw scan support is deprecated\n");
4008                 iwl3945_hw_ops.hw_scan = NULL;
4009         }
4010
4011
4012         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4013         priv->cfg = cfg;
4014         priv->pci_dev = pdev;
4015         priv->inta_mask = CSR_INI_SET_MASK;
4016
4017         if (iwl_alloc_traffic_mem(priv))
4018                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4019
4020         /***************************
4021          * 2. Initializing PCI bus
4022          * *************************/
4023         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
4024                                 PCIE_LINK_STATE_CLKPM);
4025
4026         if (pci_enable_device(pdev)) {
4027                 err = -ENODEV;
4028                 goto out_ieee80211_free_hw;
4029         }
4030
4031         pci_set_master(pdev);
4032
4033         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4034         if (!err)
4035                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4036         if (err) {
4037                 IWL_WARN(priv, "No suitable DMA available.\n");
4038                 goto out_pci_disable_device;
4039         }
4040
4041         pci_set_drvdata(pdev, priv);
4042         err = pci_request_regions(pdev, DRV_NAME);
4043         if (err)
4044                 goto out_pci_disable_device;
4045
4046         /***********************
4047          * 3. Read REV Register
4048          * ********************/
4049         priv->hw_base = pci_iomap(pdev, 0, 0);
4050         if (!priv->hw_base) {
4051                 err = -ENODEV;
4052                 goto out_pci_release_regions;
4053         }
4054
4055         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4056                         (unsigned long long) pci_resource_len(pdev, 0));
4057         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4058
4059         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4060          * PCI Tx retries from interfering with C3 CPU state */
4061         pci_write_config_byte(pdev, 0x41, 0x00);
4062
4063         /* these spin locks will be used in apm_ops.init and EEPROM access
4064          * we should init now
4065          */
4066         spin_lock_init(&priv->reg_lock);
4067         spin_lock_init(&priv->lock);
4068
4069         /*
4070          * stop and reset the on-board processor just in case it is in a
4071          * strange state ... like being left stranded by a primary kernel
4072          * and this is now the kdump kernel trying to start up
4073          */
4074         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4075
4076         /***********************
4077          * 4. Read EEPROM
4078          * ********************/
4079
4080         /* Read the EEPROM */
4081         err = iwl_eeprom_init(priv);
4082         if (err) {
4083                 IWL_ERR(priv, "Unable to init EEPROM\n");
4084                 goto out_iounmap;
4085         }
4086         /* MAC Address location in EEPROM same for 3945/4965 */
4087         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4088         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
4089         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
4090
4091         /***********************
4092          * 5. Setup HW Constants
4093          * ********************/
4094         /* Device-specific setup */
4095         if (iwl3945_hw_set_hw_params(priv)) {
4096                 IWL_ERR(priv, "failed to set hw settings\n");
4097                 goto out_eeprom_free;
4098         }
4099
4100         /***********************
4101          * 6. Setup priv
4102          * ********************/
4103
4104         err = iwl3945_init_drv(priv);
4105         if (err) {
4106                 IWL_ERR(priv, "initializing driver failed\n");
4107                 goto out_unset_hw_params;
4108         }
4109
4110         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4111                 priv->cfg->name);
4112
4113         /***********************
4114          * 7. Setup Services
4115          * ********************/
4116
4117         spin_lock_irqsave(&priv->lock, flags);
4118         iwl_disable_interrupts(priv);
4119         spin_unlock_irqrestore(&priv->lock, flags);
4120
4121         pci_enable_msi(priv->pci_dev);
4122
4123         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr_ops.isr,
4124                           IRQF_SHARED, DRV_NAME, priv);
4125         if (err) {
4126                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4127                 goto out_disable_msi;
4128         }
4129
4130         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4131         if (err) {
4132                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4133                 goto out_release_irq;
4134         }
4135
4136         iwl_set_rxon_channel(priv,
4137                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5],
4138                              &priv->contexts[IWL_RXON_CTX_BSS]);
4139         iwl3945_setup_deferred_work(priv);
4140         iwl3945_setup_rx_handlers(priv);
4141         iwl_power_initialize(priv);
4142
4143         /*********************************
4144          * 8. Setup and Register mac80211
4145          * *******************************/
4146
4147         iwl_enable_interrupts(priv);
4148
4149         err = iwl3945_setup_mac(priv);
4150         if (err)
4151                 goto  out_remove_sysfs;
4152
4153         err = iwl_dbgfs_register(priv, DRV_NAME);
4154         if (err)
4155                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4156
4157         /* Start monitoring the killswitch */
4158         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4159                            2 * HZ);
4160
4161         return 0;
4162
4163  out_remove_sysfs:
4164         destroy_workqueue(priv->workqueue);
4165         priv->workqueue = NULL;
4166         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4167  out_release_irq:
4168         free_irq(priv->pci_dev->irq, priv);
4169  out_disable_msi:
4170         pci_disable_msi(priv->pci_dev);
4171         iwlcore_free_geos(priv);
4172         iwl_free_channel_map(priv);
4173  out_unset_hw_params:
4174         iwl3945_unset_hw_params(priv);
4175  out_eeprom_free:
4176         iwl_eeprom_free(priv);
4177  out_iounmap:
4178         pci_iounmap(pdev, priv->hw_base);
4179  out_pci_release_regions:
4180         pci_release_regions(pdev);
4181  out_pci_disable_device:
4182         pci_set_drvdata(pdev, NULL);
4183         pci_disable_device(pdev);
4184  out_ieee80211_free_hw:
4185         iwl_free_traffic_mem(priv);
4186         ieee80211_free_hw(priv->hw);
4187  out:
4188         return err;
4189 }
4190
4191 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4192 {
4193         struct iwl_priv *priv = pci_get_drvdata(pdev);
4194         unsigned long flags;
4195
4196         if (!priv)
4197                 return;
4198
4199         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4200
4201         iwl_dbgfs_unregister(priv);
4202
4203         set_bit(STATUS_EXIT_PENDING, &priv->status);
4204
4205         if (priv->mac80211_registered) {
4206                 ieee80211_unregister_hw(priv->hw);
4207                 priv->mac80211_registered = 0;
4208         } else {
4209                 iwl3945_down(priv);
4210         }
4211
4212         /*
4213          * Make sure device is reset to low power before unloading driver.
4214          * This may be redundant with iwl_down(), but there are paths to
4215          * run iwl_down() without calling apm_ops.stop(), and there are
4216          * paths to avoid running iwl_down() at all before leaving driver.
4217          * This (inexpensive) call *makes sure* device is reset.
4218          */
4219         iwl_apm_stop(priv);
4220
4221         /* make sure we flush any pending irq or
4222          * tasklet for the driver
4223          */
4224         spin_lock_irqsave(&priv->lock, flags);
4225         iwl_disable_interrupts(priv);
4226         spin_unlock_irqrestore(&priv->lock, flags);
4227
4228         iwl_synchronize_irq(priv);
4229
4230         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4231
4232         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4233
4234         iwl3945_dealloc_ucode_pci(priv);
4235
4236         if (priv->rxq.bd)
4237                 iwl3945_rx_queue_free(priv, &priv->rxq);
4238         iwl3945_hw_txq_ctx_free(priv);
4239
4240         iwl3945_unset_hw_params(priv);
4241
4242         /*netif_stop_queue(dev); */
4243         flush_workqueue(priv->workqueue);
4244
4245         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4246          * priv->workqueue... so we can't take down the workqueue
4247          * until now... */
4248         destroy_workqueue(priv->workqueue);
4249         priv->workqueue = NULL;
4250         iwl_free_traffic_mem(priv);
4251
4252         free_irq(pdev->irq, priv);
4253         pci_disable_msi(pdev);
4254
4255         pci_iounmap(pdev, priv->hw_base);
4256         pci_release_regions(pdev);
4257         pci_disable_device(pdev);
4258         pci_set_drvdata(pdev, NULL);
4259
4260         iwl_free_channel_map(priv);
4261         iwlcore_free_geos(priv);
4262         kfree(priv->scan_cmd);
4263         if (priv->beacon_skb)
4264                 dev_kfree_skb(priv->beacon_skb);
4265
4266         ieee80211_free_hw(priv->hw);
4267 }
4268
4269
4270 /*****************************************************************************
4271  *
4272  * driver and module entry point
4273  *
4274  *****************************************************************************/
4275
4276 static struct pci_driver iwl3945_driver = {
4277         .name = DRV_NAME,
4278         .id_table = iwl3945_hw_card_ids,
4279         .probe = iwl3945_pci_probe,
4280         .remove = __devexit_p(iwl3945_pci_remove),
4281         .driver.pm = IWL_PM_OPS,
4282 };
4283
4284 static int __init iwl3945_init(void)
4285 {
4286
4287         int ret;
4288         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
4289         pr_info(DRV_COPYRIGHT "\n");
4290
4291         ret = iwl3945_rate_control_register();
4292         if (ret) {
4293                 pr_err("Unable to register rate control algorithm: %d\n", ret);
4294                 return ret;
4295         }
4296
4297         ret = pci_register_driver(&iwl3945_driver);
4298         if (ret) {
4299                 pr_err("Unable to initialize PCI module\n");
4300                 goto error_register;
4301         }
4302
4303         return ret;
4304
4305 error_register:
4306         iwl3945_rate_control_unregister();
4307         return ret;
4308 }
4309
4310 static void __exit iwl3945_exit(void)
4311 {
4312         pci_unregister_driver(&iwl3945_driver);
4313         iwl3945_rate_control_unregister();
4314 }
4315
4316 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4317
4318 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4319 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4320 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4321 MODULE_PARM_DESC(swcrypto,
4322                  "using software crypto (default 1 [software])\n");
4323 #ifdef CONFIG_IWLWIFI_DEBUG
4324 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4325 MODULE_PARM_DESC(debug, "debug output mask");
4326 #endif
4327 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4328                    int, S_IRUGO);
4329 MODULE_PARM_DESC(disable_hw_scan,
4330                  "disable hardware scanning (default 0) (deprecated)");
4331 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4332 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4333
4334 module_exit(iwl3945_exit);
4335 module_init(iwl3945_init);