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/slab.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/delay.h>
  39 #include <linux/sched.h>
  40 #include <linux/skbuff.h>
  41 #include <linux/netdevice.h>
  42 #include <linux/wireless.h>
  43 #include <linux/firmware.h>
  44 #include <linux/etherdevice.h>
  45 #include <linux/if_arp.h>
  46
  47 #include <net/ieee80211_radiotap.h>
  48 #include <net/mac80211.h>
  49
  50 #include <asm/div64.h>
  51
  52 #define DRV_NAME        "iwl3945"
  53
  54 #include "iwl-fh.h"
  55 #include "iwl-3945-fh.h"
  56 #include "iwl-commands.h"
  57 #include "iwl-sta.h"
  58 #include "iwl-3945.h"
  59 #include "iwl-core.h"
  60 #include "iwl-helpers.h"
  61 #include "iwl-dev.h"
  62 #include "iwl-spectrum.h"
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67
  68 #define DRV_DESCRIPTION \
  69 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  70
  71 #ifdef CONFIG_IWLWIFI_DEBUG
  72 #define VD "d"
  73 #else
  74 #define VD
  75 #endif
  76
  77 /*
  78  * add "s" to indicate spectrum measurement included.
  79  * we add it here to be consistent with previous releases in which
  80  * this was configurable.
  81  */
  82 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  83 #define DRV_COPYRIGHT   "Copyright(c) 2003-2010 Intel Corporation"
  84 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  85
  86 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  87 MODULE_VERSION(DRV_VERSION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  89 MODULE_LICENSE("GPL");
  90
  91  /* module parameters */
  92 struct iwl_mod_params iwl3945_mod_params = {
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  99  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 100  * @priv: eeprom and antenna fields are used to determine antenna flags
 101  *
 102  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 103  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 104  *
 105  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 106  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 107  * IWL_ANTENNA_AUX       - Force AUX antenna
 108  */
 109 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 110 {
 111         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 112
 113         switch (iwl3945_mod_params.antenna) {
 114         case IWL_ANTENNA_DIVERSITY:
 115                 return 0;
 116
 117         case IWL_ANTENNA_MAIN:
 118                 if (eeprom->antenna_switch_type)
 119                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 120                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 121
 122         case IWL_ANTENNA_AUX:
 123                 if (eeprom->antenna_switch_type)
 124                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 125                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 126         }
 127
 128         /* bad antenna selector value */
 129         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 130                 iwl3945_mod_params.antenna);
 131
 132         return 0;               /* "diversity" is default if error */
 133 }
 134
 135 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 136                                    struct ieee80211_key_conf *keyconf,
 137                                    u8 sta_id)
 138 {
 139         unsigned long flags;
 140         __le16 key_flags = 0;
 141         int ret;
 142
 143         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 144         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 145
 146         if (sta_id == priv->hw_params.bcast_sta_id)
 147                 key_flags |= STA_KEY_MULTICAST_MSK;
 148
 149         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 150         keyconf->hw_key_idx = keyconf->keyidx;
 151         key_flags &= ~STA_KEY_FLG_INVALID;
 152
 153         spin_lock_irqsave(&priv->sta_lock, flags);
 154         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 155         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 156         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 160                keyconf->keylen);
 161
 162         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 163                         == STA_KEY_FLG_NO_ENC)
 164                 priv->stations[sta_id].sta.key.key_offset =
 165                                  iwl_get_free_ucode_key_index(priv);
 166         /* else, we are overriding an existing key => no need to allocated room
 167         * in uCode. */
 168
 169         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 170                 "no space for a new key");
 171
 172         priv->stations[sta_id].sta.key.key_flags = key_flags;
 173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 175
 176         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 177
 178         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 179
 180         spin_unlock_irqrestore(&priv->sta_lock, flags);
 181
 182         return ret;
 183 }
 184
 185 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 186                                   struct ieee80211_key_conf *keyconf,
 187                                   u8 sta_id)
 188 {
 189         return -EOPNOTSUPP;
 190 }
 191
 192 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 193                                   struct ieee80211_key_conf *keyconf,
 194                                   u8 sta_id)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 200 {
 201         unsigned long flags;
 202         struct iwl_addsta_cmd sta_cmd;
 203
 204         spin_lock_irqsave(&priv->sta_lock, flags);
 205         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 206         memset(&priv->stations[sta_id].sta.key, 0,
 207                 sizeof(struct iwl4965_keyinfo));
 208         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 209         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 210         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 211         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
 212         spin_unlock_irqrestore(&priv->sta_lock, flags);
 213
 214         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 215         return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 216 }
 217
 218 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 219                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 220 {
 221         int ret = 0;
 222
 223         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 224
 225         switch (keyconf->alg) {
 226         case ALG_CCMP:
 227                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 228                 break;
 229         case ALG_TKIP:
 230                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         case ALG_WEP:
 233                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 234                 break;
 235         default:
 236                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 237                 ret = -EINVAL;
 238         }
 239
 240         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 241                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 242                       sta_id, ret);
 243
 244         return ret;
 245 }
 246
 247 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 248 {
 249         int ret = -EOPNOTSUPP;
 250
 251         return ret;
 252 }
 253
 254 static int iwl3945_set_static_key(struct iwl_priv *priv,
 255                                 struct ieee80211_key_conf *key)
 256 {
 257         if (key->alg == ALG_WEP)
 258                 return -EOPNOTSUPP;
 259
 260         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 261         return -EINVAL;
 262 }
 263
 264 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 265 {
 266         struct list_head *element;
 267
 268         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 269                        priv->frames_count);
 270
 271         while (!list_empty(&priv->free_frames)) {
 272                 element = priv->free_frames.next;
 273                 list_del(element);
 274                 kfree(list_entry(element, struct iwl3945_frame, list));
 275                 priv->frames_count--;
 276         }
 277
 278         if (priv->frames_count) {
 279                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 280                             priv->frames_count);
 281                 priv->frames_count = 0;
 282         }
 283 }
 284
 285 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 286 {
 287         struct iwl3945_frame *frame;
 288         struct list_head *element;
 289         if (list_empty(&priv->free_frames)) {
 290                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 291                 if (!frame) {
 292                         IWL_ERR(priv, "Could not allocate frame!\n");
 293                         return NULL;
 294                 }
 295
 296                 priv->frames_count++;
 297                 return frame;
 298         }
 299
 300         element = priv->free_frames.next;
 301         list_del(element);
 302         return list_entry(element, struct iwl3945_frame, list);
 303 }
 304
 305 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 306 {
 307         memset(frame, 0, sizeof(*frame));
 308         list_add(&frame->list, &priv->free_frames);
 309 }
 310
 311 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 312                                 struct ieee80211_hdr *hdr,
 313                                 int left)
 314 {
 315
 316         if (!iwl_is_associated(priv) || !priv->ibss_beacon)
 317                 return 0;
 318
 319         if (priv->ibss_beacon->len > left)
 320                 return 0;
 321
 322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 323
 324         return priv->ibss_beacon->len;
 325 }
 326
 327 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 328 {
 329         struct iwl3945_frame *frame;
 330         unsigned int frame_size;
 331         int rc;
 332         u8 rate;
 333
 334         frame = iwl3945_get_free_frame(priv);
 335
 336         if (!frame) {
 337                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 338                           "command.\n");
 339                 return -ENOMEM;
 340         }
 341
 342         rate = iwl_rate_get_lowest_plcp(priv);
 343
 344         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 345
 346         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 347                               &frame->u.cmd[0]);
 348
 349         iwl3945_free_frame(priv, frame);
 350
 351         return rc;
 352 }
 353
 354 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 355 {
 356         if (priv->_3945.shared_virt)
 357                 dma_free_coherent(&priv->pci_dev->dev,
 358                                   sizeof(struct iwl3945_shared),
 359                                   priv->_3945.shared_virt,
 360                                   priv->_3945.shared_phys);
 361 }
 362
 363 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 364                                       struct ieee80211_tx_info *info,
 365                                       struct iwl_device_cmd *cmd,
 366                                       struct sk_buff *skb_frag,
 367                                       int sta_id)
 368 {
 369         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 370         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 371
 372         switch (keyinfo->alg) {
 373         case ALG_CCMP:
 374                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 375                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 376                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 377                 break;
 378
 379         case ALG_TKIP:
 380                 break;
 381
 382         case ALG_WEP:
 383                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 384                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 385
 386                 if (keyinfo->keylen == 13)
 387                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 388
 389                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 390
 391                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 392                              "with key %d\n", info->control.hw_key->hw_key_idx);
 393                 break;
 394
 395         default:
 396                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 397                 break;
 398         }
 399 }
 400
 401 /*
 402  * handle build REPLY_TX command notification.
 403  */
 404 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 405                                   struct iwl_device_cmd *cmd,
 406                                   struct ieee80211_tx_info *info,
 407                                   struct ieee80211_hdr *hdr, u8 std_id)
 408 {
 409         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 410         __le32 tx_flags = tx_cmd->tx_flags;
 411         __le16 fc = hdr->frame_control;
 412
 413         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 414         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 415                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 416                 if (ieee80211_is_mgmt(fc))
 417                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 418                 if (ieee80211_is_probe_resp(fc) &&
 419                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 420                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 421         } else {
 422                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 423                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 424         }
 425
 426         tx_cmd->sta_id = std_id;
 427         if (ieee80211_has_morefrags(fc))
 428                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 429
 430         if (ieee80211_is_data_qos(fc)) {
 431                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 432                 tx_cmd->tid_tspec = qc[0] & 0xf;
 433                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 434         } else {
 435                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 436         }
 437
 438         priv->cfg->ops->utils->tx_cmd_protection(priv, info, fc, &tx_flags);
 439
 440         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 441         if (ieee80211_is_mgmt(fc)) {
 442                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 443                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 444                 else
 445                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 446         } else {
 447                 tx_cmd->timeout.pm_frame_timeout = 0;
 448         }
 449
 450         tx_cmd->driver_txop = 0;
 451         tx_cmd->tx_flags = tx_flags;
 452         tx_cmd->next_frame_len = 0;
 453 }
 454
 455 /*
 456  * start REPLY_TX command process
 457  */
 458 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 459 {
 460         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 461         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 462         struct iwl3945_tx_cmd *tx_cmd;
 463         struct iwl_tx_queue *txq = NULL;
 464         struct iwl_queue *q = NULL;
 465         struct iwl_device_cmd *out_cmd;
 466         struct iwl_cmd_meta *out_meta;
 467         dma_addr_t phys_addr;
 468         dma_addr_t txcmd_phys;
 469         int txq_id = skb_get_queue_mapping(skb);
 470         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 471         u8 id;
 472         u8 unicast;
 473         u8 sta_id;
 474         u8 tid = 0;
 475         __le16 fc;
 476         u8 wait_write_ptr = 0;
 477         unsigned long flags;
 478
 479         spin_lock_irqsave(&priv->lock, flags);
 480         if (iwl_is_rfkill(priv)) {
 481                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 482                 goto drop_unlock;
 483         }
 484
 485         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 486                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 487                 goto drop_unlock;
 488         }
 489
 490         unicast = !is_multicast_ether_addr(hdr->addr1);
 491         id = 0;
 492
 493         fc = hdr->frame_control;
 494
 495 #ifdef CONFIG_IWLWIFI_DEBUG
 496         if (ieee80211_is_auth(fc))
 497                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 498         else if (ieee80211_is_assoc_req(fc))
 499                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 500         else if (ieee80211_is_reassoc_req(fc))
 501                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 502 #endif
 503
 504         spin_unlock_irqrestore(&priv->lock, flags);
 505
 506         hdr_len = ieee80211_hdrlen(fc);
 507
 508         /* Find index into station table for destination station */
 509         sta_id = iwl_sta_id_or_broadcast(priv, info->control.sta);
 510         if (sta_id == IWL_INVALID_STATION) {
 511                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 512                                hdr->addr1);
 513                 goto drop;
 514         }
 515
 516         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 517
 518         if (ieee80211_is_data_qos(fc)) {
 519                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 520                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 521                 if (unlikely(tid >= MAX_TID_COUNT))
 522                         goto drop;
 523         }
 524
 525         /* Descriptor for chosen Tx queue */
 526         txq = &priv->txq[txq_id];
 527         q = &txq->q;
 528
 529         if ((iwl_queue_space(q) < q->high_mark))
 530                 goto drop;
 531
 532         spin_lock_irqsave(&priv->lock, flags);
 533
 534         idx = get_cmd_index(q, q->write_ptr, 0);
 535
 536         /* Set up driver data for this TFD */
 537         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 538         txq->txb[q->write_ptr].skb = skb;
 539
 540         /* Init first empty entry in queue's array of Tx/cmd buffers */
 541         out_cmd = txq->cmd[idx];
 542         out_meta = &txq->meta[idx];
 543         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 544         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 545         memset(tx_cmd, 0, sizeof(*tx_cmd));
 546
 547         /*
 548          * Set up the Tx-command (not MAC!) header.
 549          * Store the chosen Tx queue and TFD index within the sequence field;
 550          * after Tx, uCode's Tx response will return this value so driver can
 551          * locate the frame within the tx queue and do post-tx processing.
 552          */
 553         out_cmd->hdr.cmd = REPLY_TX;
 554         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 555                                 INDEX_TO_SEQ(q->write_ptr)));
 556
 557         /* Copy MAC header from skb into command buffer */
 558         memcpy(tx_cmd->hdr, hdr, hdr_len);
 559
 560
 561         if (info->control.hw_key)
 562                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 563
 564         /* TODO need this for burst mode later on */
 565         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 566
 567         /* set is_hcca to 0; it probably will never be implemented */
 568         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 569
 570         /* Total # bytes to be transmitted */
 571         len = (u16)skb->len;
 572         tx_cmd->len = cpu_to_le16(len);
 573
 574         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 575         iwl_update_stats(priv, true, fc, len);
 576         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 577         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 578
 579         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 580                 txq->need_update = 1;
 581         } else {
 582                 wait_write_ptr = 1;
 583                 txq->need_update = 0;
 584         }
 585
 586         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 587                      le16_to_cpu(out_cmd->hdr.sequence));
 588         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 589         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 590         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 591                            ieee80211_hdrlen(fc));
 592
 593         /*
 594          * Use the first empty entry in this queue's command buffer array
 595          * to contain the Tx command and MAC header concatenated together
 596          * (payload data will be in another buffer).
 597          * Size of this varies, due to varying MAC header length.
 598          * If end is not dword aligned, we'll have 2 extra bytes at the end
 599          * of the MAC header (device reads on dword boundaries).
 600          * We'll tell device about this padding later.
 601          */
 602         len = sizeof(struct iwl3945_tx_cmd) +
 603                         sizeof(struct iwl_cmd_header) + hdr_len;
 604
 605         len_org = len;
 606         len = (len + 3) & ~3;
 607
 608         if (len_org != len)
 609                 len_org = 1;
 610         else
 611                 len_org = 0;
 612
 613         /* Physical address of this Tx command's header (not MAC header!),
 614          * within command buffer array. */
 615         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 616                                     len, PCI_DMA_TODEVICE);
 617         /* we do not map meta data ... so we can safely access address to
 618          * provide to unmap command*/
 619         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 620         dma_unmap_len_set(out_meta, len, len);
 621
 622         /* Add buffer containing Tx command and MAC(!) header to TFD's
 623          * first entry */
 624         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 625                                                    txcmd_phys, len, 1, 0);
 626
 627
 628         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 629          * if any (802.11 null frames have no payload). */
 630         len = skb->len - hdr_len;
 631         if (len) {
 632                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 633                                            len, PCI_DMA_TODEVICE);
 634                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 635                                                            phys_addr, len,
 636                                                            0, U32_PAD(len));
 637         }
 638
 639
 640         /* Tell device the write index *just past* this latest filled TFD */
 641         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 642         iwl_txq_update_write_ptr(priv, txq);
 643         spin_unlock_irqrestore(&priv->lock, flags);
 644
 645         if ((iwl_queue_space(q) < q->high_mark)
 646             && priv->mac80211_registered) {
 647                 if (wait_write_ptr) {
 648                         spin_lock_irqsave(&priv->lock, flags);
 649                         txq->need_update = 1;
 650                         iwl_txq_update_write_ptr(priv, txq);
 651                         spin_unlock_irqrestore(&priv->lock, flags);
 652                 }
 653
 654                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 655         }
 656
 657         return 0;
 658
 659 drop_unlock:
 660         spin_unlock_irqrestore(&priv->lock, flags);
 661 drop:
 662         return -1;
 663 }
 664
 665 static int iwl3945_get_measurement(struct iwl_priv *priv,
 666                                struct ieee80211_measurement_params *params,
 667                                u8 type)
 668 {
 669         struct iwl_spectrum_cmd spectrum;
 670         struct iwl_rx_packet *pkt;
 671         struct iwl_host_cmd cmd = {
 672                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 673                 .data = (void *)&spectrum,
 674                 .flags = CMD_WANT_SKB,
 675         };
 676         u32 add_time = le64_to_cpu(params->start_time);
 677         int rc;
 678         int spectrum_resp_status;
 679         int duration = le16_to_cpu(params->duration);
 680
 681         if (iwl_is_associated(priv))
 682                 add_time = iwl_usecs_to_beacons(priv,
 683                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 684                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 685
 686         memset(&spectrum, 0, sizeof(spectrum));
 687
 688         spectrum.channel_count = cpu_to_le16(1);
 689         spectrum.flags =
 690             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 691         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 692         cmd.len = sizeof(spectrum);
 693         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 694
 695         if (iwl_is_associated(priv))
 696                 spectrum.start_time =
 697                         iwl_add_beacon_time(priv,
 698                                 priv->_3945.last_beacon_time, add_time,
 699                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 700         else
 701                 spectrum.start_time = 0;
 702
 703         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 704         spectrum.channels[0].channel = params->channel;
 705         spectrum.channels[0].type = type;
 706         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 707                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 708                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 709
 710         rc = iwl_send_cmd_sync(priv, &cmd);
 711         if (rc)
 712                 return rc;
 713
 714         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 715         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 716                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 717                 rc = -EIO;
 718         }
 719
 720         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 721         switch (spectrum_resp_status) {
 722         case 0:         /* Command will be handled */
 723                 if (pkt->u.spectrum.id != 0xff) {
 724                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 725                                                 pkt->u.spectrum.id);
 726                         priv->measurement_status &= ~MEASUREMENT_READY;
 727                 }
 728                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 729                 rc = 0;
 730                 break;
 731
 732         case 1:         /* Command will not be handled */
 733                 rc = -EAGAIN;
 734                 break;
 735         }
 736
 737         iwl_free_pages(priv, cmd.reply_page);
 738
 739         return rc;
 740 }
 741
 742 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 743                                struct iwl_rx_mem_buffer *rxb)
 744 {
 745         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 746         struct iwl_alive_resp *palive;
 747         struct delayed_work *pwork;
 748
 749         palive = &pkt->u.alive_frame;
 750
 751         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 752                        "0x%01X 0x%01X\n",
 753                        palive->is_valid, palive->ver_type,
 754                        palive->ver_subtype);
 755
 756         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 757                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 758                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 759                        sizeof(struct iwl_alive_resp));
 760                 pwork = &priv->init_alive_start;
 761         } else {
 762                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 763                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 764                        sizeof(struct iwl_alive_resp));
 765                 pwork = &priv->alive_start;
 766                 iwl3945_disable_events(priv);
 767         }
 768
 769         /* We delay the ALIVE response by 5ms to
 770          * give the HW RF Kill time to activate... */
 771         if (palive->is_valid == UCODE_VALID_OK)
 772                 queue_delayed_work(priv->workqueue, pwork,
 773                                    msecs_to_jiffies(5));
 774         else
 775                 IWL_WARN(priv, "uCode did not respond OK.\n");
 776 }
 777
 778 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 779                                  struct iwl_rx_mem_buffer *rxb)
 780 {
 781 #ifdef CONFIG_IWLWIFI_DEBUG
 782         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 783 #endif
 784
 785         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 786 }
 787
 788 static void iwl3945_bg_beacon_update(struct work_struct *work)
 789 {
 790         struct iwl_priv *priv =
 791                 container_of(work, struct iwl_priv, beacon_update);
 792         struct sk_buff *beacon;
 793
 794         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 795         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 796
 797         if (!beacon) {
 798                 IWL_ERR(priv, "update beacon failed\n");
 799                 return;
 800         }
 801
 802         mutex_lock(&priv->mutex);
 803         /* new beacon skb is allocated every time; dispose previous.*/
 804         if (priv->ibss_beacon)
 805                 dev_kfree_skb(priv->ibss_beacon);
 806
 807         priv->ibss_beacon = beacon;
 808         mutex_unlock(&priv->mutex);
 809
 810         iwl3945_send_beacon_cmd(priv);
 811 }
 812
 813 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 814                                 struct iwl_rx_mem_buffer *rxb)
 815 {
 816 #ifdef CONFIG_IWLWIFI_DEBUG
 817         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 818         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 819         u8 rate = beacon->beacon_notify_hdr.rate;
 820
 821         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 822                 "tsf %d %d rate %d\n",
 823                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 824                 beacon->beacon_notify_hdr.failure_frame,
 825                 le32_to_cpu(beacon->ibss_mgr_status),
 826                 le32_to_cpu(beacon->high_tsf),
 827                 le32_to_cpu(beacon->low_tsf), rate);
 828 #endif
 829
 830         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 831             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 832                 queue_work(priv->workqueue, &priv->beacon_update);
 833 }
 834
 835 /* Handle notification from uCode that card's power state is changing
 836  * due to software, hardware, or critical temperature RFKILL */
 837 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 838                                     struct iwl_rx_mem_buffer *rxb)
 839 {
 840         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 841         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 842         unsigned long status = priv->status;
 843
 844         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 845                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 846                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 847
 848         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 849                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 850
 851         if (flags & HW_CARD_DISABLED)
 852                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 853         else
 854                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 855
 856
 857         iwl_scan_cancel(priv);
 858
 859         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 860              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 861                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 862                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 863         else
 864                 wake_up_interruptible(&priv->wait_command_queue);
 865 }
 866
 867 /**
 868  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 869  *
 870  * Setup the RX handlers for each of the reply types sent from the uCode
 871  * to the host.
 872  *
 873  * This function chains into the hardware specific files for them to setup
 874  * any hardware specific handlers as well.
 875  */
 876 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 877 {
 878         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 879         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 880         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 881         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 882         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 883                         iwl_rx_spectrum_measure_notif;
 884         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 885         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 886             iwl_rx_pm_debug_statistics_notif;
 887         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 888
 889         /*
 890          * The same handler is used for both the REPLY to a discrete
 891          * statistics request from the host as well as for the periodic
 892          * statistics notifications (after received beacons) from the uCode.
 893          */
 894         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 895         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 896
 897         iwl_setup_rx_scan_handlers(priv);
 898         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 899
 900         /* Set up hardware specific Rx handlers */
 901         iwl3945_hw_rx_handler_setup(priv);
 902 }
 903
 904 /************************** RX-FUNCTIONS ****************************/
 905 /*
 906  * Rx theory of operation
 907  *
 908  * The host allocates 32 DMA target addresses and passes the host address
 909  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 910  * 0 to 31
 911  *
 912  * Rx Queue Indexes
 913  * The host/firmware share two index registers for managing the Rx buffers.
 914  *
 915  * The READ index maps to the first position that the firmware may be writing
 916  * to -- the driver can read up to (but not including) this position and get
 917  * good data.
 918  * The READ index is managed by the firmware once the card is enabled.
 919  *
 920  * The WRITE index maps to the last position the driver has read from -- the
 921  * position preceding WRITE is the last slot the firmware can place a packet.
 922  *
 923  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 924  * WRITE = READ.
 925  *
 926  * During initialization, the host sets up the READ queue position to the first
 927  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 928  *
 929  * When the firmware places a packet in a buffer, it will advance the READ index
 930  * and fire the RX interrupt.  The driver can then query the READ index and
 931  * process as many packets as possible, moving the WRITE index forward as it
 932  * resets the Rx queue buffers with new memory.
 933  *
 934  * The management in the driver is as follows:
 935  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 936  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 937  *   to replenish the iwl->rxq->rx_free.
 938  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 939  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 940  *   'processed' and 'read' driver indexes as well)
 941  * + A received packet is processed and handed to the kernel network stack,
 942  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 943  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 944  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 945  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 946  *   were enough free buffers and RX_STALLED is set it is cleared.
 947  *
 948  *
 949  * Driver sequence:
 950  *
 951  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 952  *                            iwl3945_rx_queue_restock
 953  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 954  *                            queue, updates firmware pointers, and updates
 955  *                            the WRITE index.  If insufficient rx_free buffers
 956  *                            are available, schedules iwl3945_rx_replenish
 957  *
 958  * -- enable interrupts --
 959  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 960  *                            READ INDEX, detaching the SKB from the pool.
 961  *                            Moves the packet buffer from queue to rx_used.
 962  *                            Calls iwl3945_rx_queue_restock to refill any empty
 963  *                            slots.
 964  * ...
 965  *
 966  */
 967
 968 /**
 969  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 970  */
 971 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 972                                           dma_addr_t dma_addr)
 973 {
 974         return cpu_to_le32((u32)dma_addr);
 975 }
 976
 977 /**
 978  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 979  *
 980  * If there are slots in the RX queue that need to be restocked,
 981  * and we have free pre-allocated buffers, fill the ranks as much
 982  * as we can, pulling from rx_free.
 983  *
 984  * This moves the 'write' index forward to catch up with 'processed', and
 985  * also updates the memory address in the firmware to reference the new
 986  * target buffer.
 987  */
 988 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
 989 {
 990         struct iwl_rx_queue *rxq = &priv->rxq;
 991         struct list_head *element;
 992         struct iwl_rx_mem_buffer *rxb;
 993         unsigned long flags;
 994         int write;
 995
 996         spin_lock_irqsave(&rxq->lock, flags);
 997         write = rxq->write & ~0x7;
 998         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
 999                 /* Get next free Rx buffer, remove from free list */
1000                 element = rxq->rx_free.next;
1001                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1002                 list_del(element);
1003
1004                 /* Point to Rx buffer via next RBD in circular buffer */
1005                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1006                 rxq->queue[rxq->write] = rxb;
1007                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1008                 rxq->free_count--;
1009         }
1010         spin_unlock_irqrestore(&rxq->lock, flags);
1011         /* If the pre-allocated buffer pool is dropping low, schedule to
1012          * refill it */
1013         if (rxq->free_count <= RX_LOW_WATERMARK)
1014                 queue_work(priv->workqueue, &priv->rx_replenish);
1015
1016
1017         /* If we've added more space for the firmware to place data, tell it.
1018          * Increment device's write pointer in multiples of 8. */
1019         if ((rxq->write_actual != (rxq->write & ~0x7))
1020             || (abs(rxq->write - rxq->read) > 7)) {
1021                 spin_lock_irqsave(&rxq->lock, flags);
1022                 rxq->need_update = 1;
1023                 spin_unlock_irqrestore(&rxq->lock, flags);
1024                 iwl_rx_queue_update_write_ptr(priv, rxq);
1025         }
1026 }
1027
1028 /**
1029  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1030  *
1031  * When moving to rx_free an SKB is allocated for the slot.
1032  *
1033  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1034  * This is called as a scheduled work item (except for during initialization)
1035  */
1036 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1037 {
1038         struct iwl_rx_queue *rxq = &priv->rxq;
1039         struct list_head *element;
1040         struct iwl_rx_mem_buffer *rxb;
1041         struct page *page;
1042         unsigned long flags;
1043         gfp_t gfp_mask = priority;
1044
1045         while (1) {
1046                 spin_lock_irqsave(&rxq->lock, flags);
1047
1048                 if (list_empty(&rxq->rx_used)) {
1049                         spin_unlock_irqrestore(&rxq->lock, flags);
1050                         return;
1051                 }
1052                 spin_unlock_irqrestore(&rxq->lock, flags);
1053
1054                 if (rxq->free_count > RX_LOW_WATERMARK)
1055                         gfp_mask |= __GFP_NOWARN;
1056
1057                 if (priv->hw_params.rx_page_order > 0)
1058                         gfp_mask |= __GFP_COMP;
1059
1060                 /* Alloc a new receive buffer */
1061                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1062                 if (!page) {
1063                         if (net_ratelimit())
1064                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1065                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1066                             net_ratelimit())
1067                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1068                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1069                                          rxq->free_count);
1070                         /* We don't reschedule replenish work here -- we will
1071                          * call the restock method and if it still needs
1072                          * more buffers it will schedule replenish */
1073                         break;
1074                 }
1075
1076                 spin_lock_irqsave(&rxq->lock, flags);
1077                 if (list_empty(&rxq->rx_used)) {
1078                         spin_unlock_irqrestore(&rxq->lock, flags);
1079                         __free_pages(page, priv->hw_params.rx_page_order);
1080                         return;
1081                 }
1082                 element = rxq->rx_used.next;
1083                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1084                 list_del(element);
1085                 spin_unlock_irqrestore(&rxq->lock, flags);
1086
1087                 rxb->page = page;
1088                 /* Get physical address of RB/SKB */
1089                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1090                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1091                                 PCI_DMA_FROMDEVICE);
1092
1093                 spin_lock_irqsave(&rxq->lock, flags);
1094
1095                 list_add_tail(&rxb->list, &rxq->rx_free);
1096                 rxq->free_count++;
1097                 priv->alloc_rxb_page++;
1098
1099                 spin_unlock_irqrestore(&rxq->lock, flags);
1100         }
1101 }
1102
1103 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1104 {
1105         unsigned long flags;
1106         int i;
1107         spin_lock_irqsave(&rxq->lock, flags);
1108         INIT_LIST_HEAD(&rxq->rx_free);
1109         INIT_LIST_HEAD(&rxq->rx_used);
1110         /* Fill the rx_used queue with _all_ of the Rx buffers */
1111         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1112                 /* In the reset function, these buffers may have been allocated
1113                  * to an SKB, so we need to unmap and free potential storage */
1114                 if (rxq->pool[i].page != NULL) {
1115                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1116                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1117                                 PCI_DMA_FROMDEVICE);
1118                         __iwl_free_pages(priv, rxq->pool[i].page);
1119                         rxq->pool[i].page = NULL;
1120                 }
1121                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1122         }
1123
1124         /* Set us so that we have processed and used all buffers, but have
1125          * not restocked the Rx queue with fresh buffers */
1126         rxq->read = rxq->write = 0;
1127         rxq->write_actual = 0;
1128         rxq->free_count = 0;
1129         spin_unlock_irqrestore(&rxq->lock, flags);
1130 }
1131
1132 void iwl3945_rx_replenish(void *data)
1133 {
1134         struct iwl_priv *priv = data;
1135         unsigned long flags;
1136
1137         iwl3945_rx_allocate(priv, GFP_KERNEL);
1138
1139         spin_lock_irqsave(&priv->lock, flags);
1140         iwl3945_rx_queue_restock(priv);
1141         spin_unlock_irqrestore(&priv->lock, flags);
1142 }
1143
1144 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1145 {
1146         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1147
1148         iwl3945_rx_queue_restock(priv);
1149 }
1150
1151
1152 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1153  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1154  * This free routine walks the list of POOL entries and if SKB is set to
1155  * non NULL it is unmapped and freed
1156  */
1157 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1158 {
1159         int i;
1160         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1161                 if (rxq->pool[i].page != NULL) {
1162                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1163                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1164                                 PCI_DMA_FROMDEVICE);
1165                         __iwl_free_pages(priv, rxq->pool[i].page);
1166                         rxq->pool[i].page = NULL;
1167                 }
1168         }
1169
1170         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1171                           rxq->bd_dma);
1172         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1173                           rxq->rb_stts, rxq->rb_stts_dma);
1174         rxq->bd = NULL;
1175         rxq->rb_stts  = NULL;
1176 }
1177
1178
1179 /* Convert linear signal-to-noise ratio into dB */
1180 static u8 ratio2dB[100] = {
1181 /*       0   1   2   3   4   5   6   7   8   9 */
1182          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1183         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1184         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1185         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1186         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1187         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1188         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1189         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1190         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1191         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1192 };
1193
1194 /* Calculates a relative dB value from a ratio of linear
1195  *   (i.e. not dB) signal levels.
1196  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1197 int iwl3945_calc_db_from_ratio(int sig_ratio)
1198 {
1199         /* 1000:1 or higher just report as 60 dB */
1200         if (sig_ratio >= 1000)
1201                 return 60;
1202
1203         /* 100:1 or higher, divide by 10 and use table,
1204          *   add 20 dB to make up for divide by 10 */
1205         if (sig_ratio >= 100)
1206                 return 20 + (int)ratio2dB[sig_ratio/10];
1207
1208         /* We shouldn't see this */
1209         if (sig_ratio < 1)
1210                 return 0;
1211
1212         /* Use table for ratios 1:1 - 99:1 */
1213         return (int)ratio2dB[sig_ratio];
1214 }
1215
1216 /**
1217  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1218  *
1219  * Uses the priv->rx_handlers callback function array to invoke
1220  * the appropriate handlers, including command responses,
1221  * frame-received notifications, and other notifications.
1222  */
1223 static void iwl3945_rx_handle(struct iwl_priv *priv)
1224 {
1225         struct iwl_rx_mem_buffer *rxb;
1226         struct iwl_rx_packet *pkt;
1227         struct iwl_rx_queue *rxq = &priv->rxq;
1228         u32 r, i;
1229         int reclaim;
1230         unsigned long flags;
1231         u8 fill_rx = 0;
1232         u32 count = 8;
1233         int total_empty = 0;
1234
1235         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1236          * buffer that the driver may process (last buffer filled by ucode). */
1237         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1238         i = rxq->read;
1239
1240         /* calculate total frames need to be restock after handling RX */
1241         total_empty = r - rxq->write_actual;
1242         if (total_empty < 0)
1243                 total_empty += RX_QUEUE_SIZE;
1244
1245         if (total_empty > (RX_QUEUE_SIZE / 2))
1246                 fill_rx = 1;
1247         /* Rx interrupt, but nothing sent from uCode */
1248         if (i == r)
1249                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1250
1251         while (i != r) {
1252                 int len;
1253
1254                 rxb = rxq->queue[i];
1255
1256                 /* If an RXB doesn't have a Rx queue slot associated with it,
1257                  * then a bug has been introduced in the queue refilling
1258                  * routines -- catch it here */
1259                 BUG_ON(rxb == NULL);
1260
1261                 rxq->queue[i] = NULL;
1262
1263                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1264                                PAGE_SIZE << priv->hw_params.rx_page_order,
1265                                PCI_DMA_FROMDEVICE);
1266                 pkt = rxb_addr(rxb);
1267
1268                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1269                 len += sizeof(u32); /* account for status word */
1270                 trace_iwlwifi_dev_rx(priv, pkt, len);
1271
1272                 /* Reclaim a command buffer only if this packet is a response
1273                  *   to a (driver-originated) command.
1274                  * If the packet (e.g. Rx frame) originated from uCode,
1275                  *   there is no command buffer to reclaim.
1276                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1277                  *   but apparently a few don't get set; catch them here. */
1278                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1279                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1280                         (pkt->hdr.cmd != REPLY_TX);
1281
1282                 /* Based on type of command response or notification,
1283                  *   handle those that need handling via function in
1284                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1285                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1286                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1287                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1288                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1289                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1290                 } else {
1291                         /* No handling needed */
1292                         IWL_DEBUG_RX(priv,
1293                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1294                                 r, i, get_cmd_string(pkt->hdr.cmd),
1295                                 pkt->hdr.cmd);
1296                 }
1297
1298                 /*
1299                  * XXX: After here, we should always check rxb->page
1300                  * against NULL before touching it or its virtual
1301                  * memory (pkt). Because some rx_handler might have
1302                  * already taken or freed the pages.
1303                  */
1304
1305                 if (reclaim) {
1306                         /* Invoke any callbacks, transfer the buffer to caller,
1307                          * and fire off the (possibly) blocking iwl_send_cmd()
1308                          * as we reclaim the driver command queue */
1309                         if (rxb->page)
1310                                 iwl_tx_cmd_complete(priv, rxb);
1311                         else
1312                                 IWL_WARN(priv, "Claim null rxb?\n");
1313                 }
1314
1315                 /* Reuse the page if possible. For notification packets and
1316                  * SKBs that fail to Rx correctly, add them back into the
1317                  * rx_free list for reuse later. */
1318                 spin_lock_irqsave(&rxq->lock, flags);
1319                 if (rxb->page != NULL) {
1320                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1321                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1322                                 PCI_DMA_FROMDEVICE);
1323                         list_add_tail(&rxb->list, &rxq->rx_free);
1324                         rxq->free_count++;
1325                 } else
1326                         list_add_tail(&rxb->list, &rxq->rx_used);
1327
1328                 spin_unlock_irqrestore(&rxq->lock, flags);
1329
1330                 i = (i + 1) & RX_QUEUE_MASK;
1331                 /* If there are a lot of unused frames,
1332                  * restock the Rx queue so ucode won't assert. */
1333                 if (fill_rx) {
1334                         count++;
1335                         if (count >= 8) {
1336                                 rxq->read = i;
1337                                 iwl3945_rx_replenish_now(priv);
1338                                 count = 0;
1339                         }
1340                 }
1341         }
1342
1343         /* Backtrack one entry */
1344         rxq->read = i;
1345         if (fill_rx)
1346                 iwl3945_rx_replenish_now(priv);
1347         else
1348                 iwl3945_rx_queue_restock(priv);
1349 }
1350
1351 /* call this function to flush any scheduled tasklet */
1352 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1353 {
1354         /* wait to make sure we flush pending tasklet*/
1355         synchronize_irq(priv->pci_dev->irq);
1356         tasklet_kill(&priv->irq_tasklet);
1357 }
1358
1359 static const char *desc_lookup(int i)
1360 {
1361         switch (i) {
1362         case 1:
1363                 return "FAIL";
1364         case 2:
1365                 return "BAD_PARAM";
1366         case 3:
1367                 return "BAD_CHECKSUM";
1368         case 4:
1369                 return "NMI_INTERRUPT";
1370         case 5:
1371                 return "SYSASSERT";
1372         case 6:
1373                 return "FATAL_ERROR";
1374         }
1375
1376         return "UNKNOWN";
1377 }
1378
1379 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1380 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1381
1382 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1383 {
1384         u32 i;
1385         u32 desc, time, count, base, data1;
1386         u32 blink1, blink2, ilink1, ilink2;
1387
1388         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1389
1390         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1391                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1392                 return;
1393         }
1394
1395
1396         count = iwl_read_targ_mem(priv, base);
1397
1398         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1399                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1400                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1401                         priv->status, count);
1402         }
1403
1404         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1405                   "ilink1  nmiPC   Line\n");
1406         for (i = ERROR_START_OFFSET;
1407              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1408              i += ERROR_ELEM_SIZE) {
1409                 desc = iwl_read_targ_mem(priv, base + i);
1410                 time =
1411                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1412                 blink1 =
1413                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1414                 blink2 =
1415                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1416                 ilink1 =
1417                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1418                 ilink2 =
1419                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1420                 data1 =
1421                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1422
1423                 IWL_ERR(priv,
1424                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1425                         desc_lookup(desc), desc, time, blink1, blink2,
1426                         ilink1, ilink2, data1);
1427                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1428                                         0, blink1, blink2, ilink1, ilink2);
1429         }
1430 }
1431
1432 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1433
1434 /**
1435  * iwl3945_print_event_log - Dump error event log to syslog
1436  *
1437  */
1438 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1439                                   u32 num_events, u32 mode,
1440                                   int pos, char **buf, size_t bufsz)
1441 {
1442         u32 i;
1443         u32 base;       /* SRAM byte address of event log header */
1444         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1445         u32 ptr;        /* SRAM byte address of log data */
1446         u32 ev, time, data; /* event log data */
1447         unsigned long reg_flags;
1448
1449         if (num_events == 0)
1450                 return pos;
1451
1452         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1453
1454         if (mode == 0)
1455                 event_size = 2 * sizeof(u32);
1456         else
1457                 event_size = 3 * sizeof(u32);
1458
1459         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1460
1461         /* Make sure device is powered up for SRAM reads */
1462         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1463         iwl_grab_nic_access(priv);
1464
1465         /* Set starting address; reads will auto-increment */
1466         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1467         rmb();
1468
1469         /* "time" is actually "data" for mode 0 (no timestamp).
1470          * place event id # at far right for easier visual parsing. */
1471         for (i = 0; i < num_events; i++) {
1472                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1473                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1474                 if (mode == 0) {
1475                         /* data, ev */
1476                         if (bufsz) {
1477                                 pos += scnprintf(*buf + pos, bufsz - pos,
1478                                                 "0x%08x:%04u\n",
1479                                                 time, ev);
1480                         } else {
1481                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1482                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1483                                                               time, ev);
1484                         }
1485                 } else {
1486                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1487                         if (bufsz) {
1488                                 pos += scnprintf(*buf + pos, bufsz - pos,
1489                                                 "%010u:0x%08x:%04u\n",
1490                                                  time, data, ev);
1491                         } else {
1492                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1493                                         time, data, ev);
1494                                 trace_iwlwifi_dev_ucode_event(priv, time,
1495                                                               data, ev);
1496                         }
1497                 }
1498         }
1499
1500         /* Allow device to power down */
1501         iwl_release_nic_access(priv);
1502         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1503         return pos;
1504 }
1505
1506 /**
1507  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1508  */
1509 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1510                                       u32 num_wraps, u32 next_entry,
1511                                       u32 size, u32 mode,
1512                                       int pos, char **buf, size_t bufsz)
1513 {
1514         /*
1515          * display the newest DEFAULT_LOG_ENTRIES entries
1516          * i.e the entries just before the next ont that uCode would fill.
1517          */
1518         if (num_wraps) {
1519                 if (next_entry < size) {
1520                         pos = iwl3945_print_event_log(priv,
1521                                              capacity - (size - next_entry),
1522                                              size - next_entry, mode,
1523                                              pos, buf, bufsz);
1524                         pos = iwl3945_print_event_log(priv, 0,
1525                                                       next_entry, mode,
1526                                                       pos, buf, bufsz);
1527                 } else
1528                         pos = iwl3945_print_event_log(priv, next_entry - size,
1529                                                       size, mode,
1530                                                       pos, buf, bufsz);
1531         } else {
1532                 if (next_entry < size)
1533                         pos = iwl3945_print_event_log(priv, 0,
1534                                                       next_entry, mode,
1535                                                       pos, buf, bufsz);
1536                 else
1537                         pos = iwl3945_print_event_log(priv, next_entry - size,
1538                                                       size, mode,
1539                                                       pos, buf, bufsz);
1540         }
1541         return pos;
1542 }
1543
1544 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1545
1546 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1547                             char **buf, bool display)
1548 {
1549         u32 base;       /* SRAM byte address of event log header */
1550         u32 capacity;   /* event log capacity in # entries */
1551         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1552         u32 num_wraps;  /* # times uCode wrapped to top of log */
1553         u32 next_entry; /* index of next entry to be written by uCode */
1554         u32 size;       /* # entries that we'll print */
1555         int pos = 0;
1556         size_t bufsz = 0;
1557
1558         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1559         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1560                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1561                 return  -EINVAL;
1562         }
1563
1564         /* event log header */
1565         capacity = iwl_read_targ_mem(priv, base);
1566         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1567         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1568         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1569
1570         if (capacity > priv->cfg->max_event_log_size) {
1571                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1572                         capacity, priv->cfg->max_event_log_size);
1573                 capacity = priv->cfg->max_event_log_size;
1574         }
1575
1576         if (next_entry > priv->cfg->max_event_log_size) {
1577                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1578                         next_entry, priv->cfg->max_event_log_size);
1579                 next_entry = priv->cfg->max_event_log_size;
1580         }
1581
1582         size = num_wraps ? capacity : next_entry;
1583
1584         /* bail out if nothing in log */
1585         if (size == 0) {
1586                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1587                 return pos;
1588         }
1589
1590 #ifdef CONFIG_IWLWIFI_DEBUG
1591         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1592                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1593                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1594 #else
1595         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1596                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1597 #endif
1598
1599         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1600                   size);
1601
1602 #ifdef CONFIG_IWLWIFI_DEBUG
1603         if (display) {
1604                 if (full_log)
1605                         bufsz = capacity * 48;
1606                 else
1607                         bufsz = size * 48;
1608                 *buf = kmalloc(bufsz, GFP_KERNEL);
1609                 if (!*buf)
1610                         return -ENOMEM;
1611         }
1612         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1613                 /* if uCode has wrapped back to top of log,
1614                  * start at the oldest entry,
1615                  * i.e the next one that uCode would fill.
1616                  */
1617                 if (num_wraps)
1618                         pos = iwl3945_print_event_log(priv, next_entry,
1619                                                 capacity - next_entry, mode,
1620                                                 pos, buf, bufsz);
1621
1622                 /* (then/else) start at top of log */
1623                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1624                                               pos, buf, bufsz);
1625         } else
1626                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1627                                                     next_entry, size, mode,
1628                                                     pos, buf, bufsz);
1629 #else
1630         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1631                                             next_entry, size, mode,
1632                                             pos, buf, bufsz);
1633 #endif
1634         return pos;
1635 }
1636
1637 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1638 {
1639         u32 inta, handled = 0;
1640         u32 inta_fh;
1641         unsigned long flags;
1642 #ifdef CONFIG_IWLWIFI_DEBUG
1643         u32 inta_mask;
1644 #endif
1645
1646         spin_lock_irqsave(&priv->lock, flags);
1647
1648         /* Ack/clear/reset pending uCode interrupts.
1649          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1650          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1651         inta = iwl_read32(priv, CSR_INT);
1652         iwl_write32(priv, CSR_INT, inta);
1653
1654         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1655          * Any new interrupts that happen after this, either while we're
1656          * in this tasklet, or later, will show up in next ISR/tasklet. */
1657         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1658         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1659
1660 #ifdef CONFIG_IWLWIFI_DEBUG
1661         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1662                 /* just for debug */
1663                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1664                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1665                               inta, inta_mask, inta_fh);
1666         }
1667 #endif
1668
1669         spin_unlock_irqrestore(&priv->lock, flags);
1670
1671         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1672          * atomic, make sure that inta covers all the interrupts that
1673          * we've discovered, even if FH interrupt came in just after
1674          * reading CSR_INT. */
1675         if (inta_fh & CSR39_FH_INT_RX_MASK)
1676                 inta |= CSR_INT_BIT_FH_RX;
1677         if (inta_fh & CSR39_FH_INT_TX_MASK)
1678                 inta |= CSR_INT_BIT_FH_TX;
1679
1680         /* Now service all interrupt bits discovered above. */
1681         if (inta & CSR_INT_BIT_HW_ERR) {
1682                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1683
1684                 /* Tell the device to stop sending interrupts */
1685                 iwl_disable_interrupts(priv);
1686
1687                 priv->isr_stats.hw++;
1688                 iwl_irq_handle_error(priv);
1689
1690                 handled |= CSR_INT_BIT_HW_ERR;
1691
1692                 return;
1693         }
1694
1695 #ifdef CONFIG_IWLWIFI_DEBUG
1696         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1697                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1698                 if (inta & CSR_INT_BIT_SCD) {
1699                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1700                                       "the frame/frames.\n");
1701                         priv->isr_stats.sch++;
1702                 }
1703
1704                 /* Alive notification via Rx interrupt will do the real work */
1705                 if (inta & CSR_INT_BIT_ALIVE) {
1706                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1707                         priv->isr_stats.alive++;
1708                 }
1709         }
1710 #endif
1711         /* Safely ignore these bits for debug checks below */
1712         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1713
1714         /* Error detected by uCode */
1715         if (inta & CSR_INT_BIT_SW_ERR) {
1716                 IWL_ERR(priv, "Microcode SW error detected. "
1717                         "Restarting 0x%X.\n", inta);
1718                 priv->isr_stats.sw++;
1719                 priv->isr_stats.sw_err = inta;
1720                 iwl_irq_handle_error(priv);
1721                 handled |= CSR_INT_BIT_SW_ERR;
1722         }
1723
1724         /* uCode wakes up after power-down sleep */
1725         if (inta & CSR_INT_BIT_WAKEUP) {
1726                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1727                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1728                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1729                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1730                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1731                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1732                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1733                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1734
1735                 priv->isr_stats.wakeup++;
1736                 handled |= CSR_INT_BIT_WAKEUP;
1737         }
1738
1739         /* All uCode command responses, including Tx command responses,
1740          * Rx "responses" (frame-received notification), and other
1741          * notifications from uCode come through here*/
1742         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1743                 iwl3945_rx_handle(priv);
1744                 priv->isr_stats.rx++;
1745                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1746         }
1747
1748         if (inta & CSR_INT_BIT_FH_TX) {
1749                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1750                 priv->isr_stats.tx++;
1751
1752                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1753                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1754                                         (FH39_SRVC_CHNL), 0x0);
1755                 handled |= CSR_INT_BIT_FH_TX;
1756         }
1757
1758         if (inta & ~handled) {
1759                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1760                 priv->isr_stats.unhandled++;
1761         }
1762
1763         if (inta & ~priv->inta_mask) {
1764                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1765                          inta & ~priv->inta_mask);
1766                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1767         }
1768
1769         /* Re-enable all interrupts */
1770         /* only Re-enable if disabled by irq */
1771         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1772                 iwl_enable_interrupts(priv);
1773
1774 #ifdef CONFIG_IWLWIFI_DEBUG
1775         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1776                 inta = iwl_read32(priv, CSR_INT);
1777                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1778                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1779                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1780                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1781         }
1782 #endif
1783 }
1784
1785 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1786                                                struct ieee80211_vif *vif,
1787                                                enum ieee80211_band band,
1788                                                struct iwl3945_scan_channel *scan_ch)
1789 {
1790         const struct ieee80211_supported_band *sband;
1791         u16 passive_dwell = 0;
1792         u16 active_dwell = 0;
1793         int added = 0;
1794         u8 channel = 0;
1795
1796         sband = iwl_get_hw_mode(priv, band);
1797         if (!sband) {
1798                 IWL_ERR(priv, "invalid band\n");
1799                 return added;
1800         }
1801
1802         active_dwell = iwl_get_active_dwell_time(priv, band, 0);
1803         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1804
1805         if (passive_dwell <= active_dwell)
1806                 passive_dwell = active_dwell + 1;
1807
1808
1809         channel = iwl_get_single_channel_number(priv, band);
1810
1811         if (channel) {
1812                 scan_ch->channel = channel;
1813                 scan_ch->type = 0;      /* passive */
1814                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1815                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1816                 /* Set txpower levels to defaults */
1817                 scan_ch->tpc.dsp_atten = 110;
1818                 if (band == IEEE80211_BAND_5GHZ)
1819                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1820                 else
1821                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1822                 added++;
1823         } else
1824                 IWL_ERR(priv, "no valid channel found\n");
1825         return added;
1826 }
1827
1828 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1829                                          enum ieee80211_band band,
1830                                      u8 is_active, u8 n_probes,
1831                                      struct iwl3945_scan_channel *scan_ch,
1832                                      struct ieee80211_vif *vif)
1833 {
1834         struct ieee80211_channel *chan;
1835         const struct ieee80211_supported_band *sband;
1836         const struct iwl_channel_info *ch_info;
1837         u16 passive_dwell = 0;
1838         u16 active_dwell = 0;
1839         int added, i;
1840
1841         sband = iwl_get_hw_mode(priv, band);
1842         if (!sband)
1843                 return 0;
1844
1845         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1846         passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
1847
1848         if (passive_dwell <= active_dwell)
1849                 passive_dwell = active_dwell + 1;
1850
1851         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1852                 chan = priv->scan_request->channels[i];
1853
1854                 if (chan->band != band)
1855                         continue;
1856
1857                 scan_ch->channel = chan->hw_value;
1858
1859                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1860                 if (!is_channel_valid(ch_info)) {
1861                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1862                                        scan_ch->channel);
1863                         continue;
1864                 }
1865
1866                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1867                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1868                 /* If passive , set up for auto-switch
1869                  *  and use long active_dwell time.
1870                  */
1871                 if (!is_active || is_channel_passive(ch_info) ||
1872                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1873                         scan_ch->type = 0;      /* passive */
1874                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1875                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1876                 } else {
1877                         scan_ch->type = 1;      /* active */
1878                 }
1879
1880                 /* Set direct probe bits. These may be used both for active
1881                  * scan channels (probes gets sent right away),
1882                  * or for passive channels (probes get se sent only after
1883                  * hearing clear Rx packet).*/
1884                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1885                         if (n_probes)
1886                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1887                 } else {
1888                         /* uCode v1 does not allow setting direct probe bits on
1889                          * passive channel. */
1890                         if ((scan_ch->type & 1) && n_probes)
1891                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1892                 }
1893
1894                 /* Set txpower levels to defaults */
1895                 scan_ch->tpc.dsp_atten = 110;
1896                 /* scan_pwr_info->tpc.dsp_atten; */
1897
1898                 /*scan_pwr_info->tpc.tx_gain; */
1899                 if (band == IEEE80211_BAND_5GHZ)
1900                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1901                 else {
1902                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1903                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1904                          * power level:
1905                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1906                          */
1907                 }
1908
1909                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1910                                scan_ch->channel,
1911                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1912                                (scan_ch->type & 1) ?
1913                                active_dwell : passive_dwell);
1914
1915                 scan_ch++;
1916                 added++;
1917         }
1918
1919         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1920         return added;
1921 }
1922
1923 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1924                               struct ieee80211_rate *rates)
1925 {
1926         int i;
1927
1928         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1929                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1930                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1931                 rates[i].hw_value_short = i;
1932                 rates[i].flags = 0;
1933                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1934                         /*
1935                          * If CCK != 1M then set short preamble rate flag.
1936                          */
1937                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1938                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1939                 }
1940         }
1941 }
1942
1943 /******************************************************************************
1944  *
1945  * uCode download functions
1946  *
1947  ******************************************************************************/
1948
1949 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1950 {
1951         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1952         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1953         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1954         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1955         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1956         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1957 }
1958
1959 /**
1960  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1961  *     looking at all data.
1962  */
1963 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1964 {
1965         u32 val;
1966         u32 save_len = len;
1967         int rc = 0;
1968         u32 errcnt;
1969
1970         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1971
1972         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1973                                IWL39_RTC_INST_LOWER_BOUND);
1974
1975         errcnt = 0;
1976         for (; len > 0; len -= sizeof(u32), image++) {
1977                 /* read data comes through single port, auto-incr addr */
1978                 /* NOTE: Use the debugless read so we don't flood kernel log
1979                  * if IWL_DL_IO is set */
1980                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1981                 if (val != le32_to_cpu(*image)) {
1982                         IWL_ERR(priv, "uCode INST section is invalid at "
1983                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1984                                   save_len - len, val, le32_to_cpu(*image));
1985                         rc = -EIO;
1986                         errcnt++;
1987                         if (errcnt >= 20)
1988                                 break;
1989                 }
1990         }
1991
1992
1993         if (!errcnt)
1994                 IWL_DEBUG_INFO(priv,
1995                         "ucode image in INSTRUCTION memory is good\n");
1996
1997         return rc;
1998 }
1999
2000
2001 /**
2002  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2003  *   using sample data 100 bytes apart.  If these sample points are good,
2004  *   it's a pretty good bet that everything between them is good, too.
2005  */
2006 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2007 {
2008         u32 val;
2009         int rc = 0;
2010         u32 errcnt = 0;
2011         u32 i;
2012
2013         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2014
2015         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2016                 /* read data comes through single port, auto-incr addr */
2017                 /* NOTE: Use the debugless read so we don't flood kernel log
2018                  * if IWL_DL_IO is set */
2019                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2020                         i + IWL39_RTC_INST_LOWER_BOUND);
2021                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2022                 if (val != le32_to_cpu(*image)) {
2023 #if 0 /* Enable this if you want to see details */
2024                         IWL_ERR(priv, "uCode INST section is invalid at "
2025                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2026                                   i, val, *image);
2027 #endif
2028                         rc = -EIO;
2029                         errcnt++;
2030                         if (errcnt >= 3)
2031                                 break;
2032                 }
2033         }
2034
2035         return rc;
2036 }
2037
2038
2039 /**
2040  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2041  *    and verify its contents
2042  */
2043 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2044 {
2045         __le32 *image;
2046         u32 len;
2047         int rc = 0;
2048
2049         /* Try bootstrap */
2050         image = (__le32 *)priv->ucode_boot.v_addr;
2051         len = priv->ucode_boot.len;
2052         rc = iwl3945_verify_inst_sparse(priv, image, len);
2053         if (rc == 0) {
2054                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2055                 return 0;
2056         }
2057
2058         /* Try initialize */
2059         image = (__le32 *)priv->ucode_init.v_addr;
2060         len = priv->ucode_init.len;
2061         rc = iwl3945_verify_inst_sparse(priv, image, len);
2062         if (rc == 0) {
2063                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2064                 return 0;
2065         }
2066
2067         /* Try runtime/protocol */
2068         image = (__le32 *)priv->ucode_code.v_addr;
2069         len = priv->ucode_code.len;
2070         rc = iwl3945_verify_inst_sparse(priv, image, len);
2071         if (rc == 0) {
2072                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2073                 return 0;
2074         }
2075
2076         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2077
2078         /* Since nothing seems to match, show first several data entries in
2079          * instruction SRAM, so maybe visual inspection will give a clue.
2080          * Selection of bootstrap image (vs. other images) is arbitrary. */
2081         image = (__le32 *)priv->ucode_boot.v_addr;
2082         len = priv->ucode_boot.len;
2083         rc = iwl3945_verify_inst_full(priv, image, len);
2084
2085         return rc;
2086 }
2087
2088 static void iwl3945_nic_start(struct iwl_priv *priv)
2089 {
2090         /* Remove all resets to allow NIC to operate */
2091         iwl_write32(priv, CSR_RESET, 0);
2092 }
2093
2094 #define IWL3945_UCODE_GET(item)                                         \
2095 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2096 {                                                                       \
2097         return le32_to_cpu(ucode->u.v1.item);                           \
2098 }
2099
2100 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2101 {
2102         return 24;
2103 }
2104
2105 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2106 {
2107         return (u8 *) ucode->u.v1.data;
2108 }
2109
2110 IWL3945_UCODE_GET(inst_size);
2111 IWL3945_UCODE_GET(data_size);
2112 IWL3945_UCODE_GET(init_size);
2113 IWL3945_UCODE_GET(init_data_size);
2114 IWL3945_UCODE_GET(boot_size);
2115
2116 /**
2117  * iwl3945_read_ucode - Read uCode images from disk file.
2118  *
2119  * Copy into buffers for card to fetch via bus-mastering
2120  */
2121 static int iwl3945_read_ucode(struct iwl_priv *priv)
2122 {
2123         const struct iwl_ucode_header *ucode;
2124         int ret = -EINVAL, index;
2125         const struct firmware *ucode_raw;
2126         /* firmware file name contains uCode/driver compatibility version */
2127         const char *name_pre = priv->cfg->fw_name_pre;
2128         const unsigned int api_max = priv->cfg->ucode_api_max;
2129         const unsigned int api_min = priv->cfg->ucode_api_min;
2130         char buf[25];
2131         u8 *src;
2132         size_t len;
2133         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2134
2135         /* Ask kernel firmware_class module to get the boot firmware off disk.
2136          * request_firmware() is synchronous, file is in memory on return. */
2137         for (index = api_max; index >= api_min; index--) {
2138                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2139                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2140                 if (ret < 0) {
2141                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2142                                   buf, ret);
2143                         if (ret == -ENOENT)
2144                                 continue;
2145                         else
2146                                 goto error;
2147                 } else {
2148                         if (index < api_max)
2149                                 IWL_ERR(priv, "Loaded firmware %s, "
2150                                         "which is deprecated. "
2151                                         " Please use API v%u instead.\n",
2152                                           buf, api_max);
2153                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2154                                        "(%zd bytes) from disk\n",
2155                                        buf, ucode_raw->size);
2156                         break;
2157                 }
2158         }
2159
2160         if (ret < 0)
2161                 goto error;
2162
2163         /* Make sure that we got at least our header! */
2164         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2165                 IWL_ERR(priv, "File size way too small!\n");
2166                 ret = -EINVAL;
2167                 goto err_release;
2168         }
2169
2170         /* Data from ucode file:  header followed by uCode images */
2171         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2172
2173         priv->ucode_ver = le32_to_cpu(ucode->ver);
2174         api_ver = IWL_UCODE_API(priv->ucode_ver);
2175         inst_size = iwl3945_ucode_get_inst_size(ucode);
2176         data_size = iwl3945_ucode_get_data_size(ucode);
2177         init_size = iwl3945_ucode_get_init_size(ucode);
2178         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2179         boot_size = iwl3945_ucode_get_boot_size(ucode);
2180         src = iwl3945_ucode_get_data(ucode);
2181
2182         /* api_ver should match the api version forming part of the
2183          * firmware filename ... but we don't check for that and only rely
2184          * on the API version read from firmware header from here on forward */
2185
2186         if (api_ver < api_min || api_ver > api_max) {
2187                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2188                           "Driver supports v%u, firmware is v%u.\n",
2189                           api_max, api_ver);
2190                 priv->ucode_ver = 0;
2191                 ret = -EINVAL;
2192                 goto err_release;
2193         }
2194         if (api_ver != api_max)
2195                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2196                           "got %u. New firmware can be obtained "
2197                           "from http://www.intellinuxwireless.org.\n",
2198                           api_max, api_ver);
2199
2200         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2201                 IWL_UCODE_MAJOR(priv->ucode_ver),
2202                 IWL_UCODE_MINOR(priv->ucode_ver),
2203                 IWL_UCODE_API(priv->ucode_ver),
2204                 IWL_UCODE_SERIAL(priv->ucode_ver));
2205
2206         snprintf(priv->hw->wiphy->fw_version,
2207                  sizeof(priv->hw->wiphy->fw_version),
2208                  "%u.%u.%u.%u",
2209                  IWL_UCODE_MAJOR(priv->ucode_ver),
2210                  IWL_UCODE_MINOR(priv->ucode_ver),
2211                  IWL_UCODE_API(priv->ucode_ver),
2212                  IWL_UCODE_SERIAL(priv->ucode_ver));
2213
2214         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2215                        priv->ucode_ver);
2216         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2217                        inst_size);
2218         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2219                        data_size);
2220         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2221                        init_size);
2222         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2223                        init_data_size);
2224         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2225                        boot_size);
2226
2227
2228         /* Verify size of file vs. image size info in file's header */
2229         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2230                 inst_size + data_size + init_size +
2231                 init_data_size + boot_size) {
2232
2233                 IWL_DEBUG_INFO(priv,
2234                         "uCode file size %zd does not match expected size\n",
2235                         ucode_raw->size);
2236                 ret = -EINVAL;
2237                 goto err_release;
2238         }
2239
2240         /* Verify that uCode images will fit in card's SRAM */
2241         if (inst_size > IWL39_MAX_INST_SIZE) {
2242                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2243                                inst_size);
2244                 ret = -EINVAL;
2245                 goto err_release;
2246         }
2247
2248         if (data_size > IWL39_MAX_DATA_SIZE) {
2249                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2250                                data_size);
2251                 ret = -EINVAL;
2252                 goto err_release;
2253         }
2254         if (init_size > IWL39_MAX_INST_SIZE) {
2255                 IWL_DEBUG_INFO(priv,
2256                                 "uCode init instr len %d too large to fit in\n",
2257                                 init_size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2262                 IWL_DEBUG_INFO(priv,
2263                                 "uCode init data len %d too large to fit in\n",
2264                                 init_data_size);
2265                 ret = -EINVAL;
2266                 goto err_release;
2267         }
2268         if (boot_size > IWL39_MAX_BSM_SIZE) {
2269                 IWL_DEBUG_INFO(priv,
2270                                 "uCode boot instr len %d too large to fit in\n",
2271                                 boot_size);
2272                 ret = -EINVAL;
2273                 goto err_release;
2274         }
2275
2276         /* Allocate ucode buffers for card's bus-master loading ... */
2277
2278         /* Runtime instructions and 2 copies of data:
2279          * 1) unmodified from disk
2280          * 2) backup cache for save/restore during power-downs */
2281         priv->ucode_code.len = inst_size;
2282         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2283
2284         priv->ucode_data.len = data_size;
2285         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2286
2287         priv->ucode_data_backup.len = data_size;
2288         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2289
2290         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2291             !priv->ucode_data_backup.v_addr)
2292                 goto err_pci_alloc;
2293
2294         /* Initialization instructions and data */
2295         if (init_size && init_data_size) {
2296                 priv->ucode_init.len = init_size;
2297                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2298
2299                 priv->ucode_init_data.len = init_data_size;
2300                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2301
2302                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2303                         goto err_pci_alloc;
2304         }
2305
2306         /* Bootstrap (instructions only, no data) */
2307         if (boot_size) {
2308                 priv->ucode_boot.len = boot_size;
2309                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2310
2311                 if (!priv->ucode_boot.v_addr)
2312                         goto err_pci_alloc;
2313         }
2314
2315         /* Copy images into buffers for card's bus-master reads ... */
2316
2317         /* Runtime instructions (first block of data in file) */
2318         len = inst_size;
2319         IWL_DEBUG_INFO(priv,
2320                 "Copying (but not loading) uCode instr len %zd\n", len);
2321         memcpy(priv->ucode_code.v_addr, src, len);
2322         src += len;
2323
2324         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2325                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2326
2327         /* Runtime data (2nd block)
2328          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2329         len = data_size;
2330         IWL_DEBUG_INFO(priv,
2331                 "Copying (but not loading) uCode data len %zd\n", len);
2332         memcpy(priv->ucode_data.v_addr, src, len);
2333         memcpy(priv->ucode_data_backup.v_addr, src, len);
2334         src += len;
2335
2336         /* Initialization instructions (3rd block) */
2337         if (init_size) {
2338                 len = init_size;
2339                 IWL_DEBUG_INFO(priv,
2340                         "Copying (but not loading) init instr len %zd\n", len);
2341                 memcpy(priv->ucode_init.v_addr, src, len);
2342                 src += len;
2343         }
2344
2345         /* Initialization data (4th block) */
2346         if (init_data_size) {
2347                 len = init_data_size;
2348                 IWL_DEBUG_INFO(priv,
2349                         "Copying (but not loading) init data len %zd\n", len);
2350                 memcpy(priv->ucode_init_data.v_addr, src, len);
2351                 src += len;
2352         }
2353
2354         /* Bootstrap instructions (5th block) */
2355         len = boot_size;
2356         IWL_DEBUG_INFO(priv,
2357                 "Copying (but not loading) boot instr len %zd\n", len);
2358         memcpy(priv->ucode_boot.v_addr, src, len);
2359
2360         /* We have our copies now, allow OS release its copies */
2361         release_firmware(ucode_raw);
2362         return 0;
2363
2364  err_pci_alloc:
2365         IWL_ERR(priv, "failed to allocate pci memory\n");
2366         ret = -ENOMEM;
2367         iwl3945_dealloc_ucode_pci(priv);
2368
2369  err_release:
2370         release_firmware(ucode_raw);
2371
2372  error:
2373         return ret;
2374 }
2375
2376
2377 /**
2378  * iwl3945_set_ucode_ptrs - Set uCode address location
2379  *
2380  * Tell initialization uCode where to find runtime uCode.
2381  *
2382  * BSM registers initially contain pointers to initialization uCode.
2383  * We need to replace them to load runtime uCode inst and data,
2384  * and to save runtime data when powering down.
2385  */
2386 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2387 {
2388         dma_addr_t pinst;
2389         dma_addr_t pdata;
2390
2391         /* bits 31:0 for 3945 */
2392         pinst = priv->ucode_code.p_addr;
2393         pdata = priv->ucode_data_backup.p_addr;
2394
2395         /* Tell bootstrap uCode where to find image to load */
2396         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2397         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2398         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2399                                  priv->ucode_data.len);
2400
2401         /* Inst byte count must be last to set up, bit 31 signals uCode
2402          *   that all new ptr/size info is in place */
2403         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2404                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2405
2406         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2407
2408         return 0;
2409 }
2410
2411 /**
2412  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2413  *
2414  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2415  *
2416  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2417  */
2418 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2419 {
2420         /* Check alive response for "valid" sign from uCode */
2421         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2422                 /* We had an error bringing up the hardware, so take it
2423                  * all the way back down so we can try again */
2424                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2425                 goto restart;
2426         }
2427
2428         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2429          * This is a paranoid check, because we would not have gotten the
2430          * "initialize" alive if code weren't properly loaded.  */
2431         if (iwl3945_verify_ucode(priv)) {
2432                 /* Runtime instruction load was bad;
2433                  * take it all the way back down so we can try again */
2434                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2435                 goto restart;
2436         }
2437
2438         /* Send pointers to protocol/runtime uCode image ... init code will
2439          * load and launch runtime uCode, which will send us another "Alive"
2440          * notification. */
2441         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2442         if (iwl3945_set_ucode_ptrs(priv)) {
2443                 /* Runtime instruction load won't happen;
2444                  * take it all the way back down so we can try again */
2445                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2446                 goto restart;
2447         }
2448         return;
2449
2450  restart:
2451         queue_work(priv->workqueue, &priv->restart);
2452 }
2453
2454 /**
2455  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2456  *                   from protocol/runtime uCode (initialization uCode's
2457  *                   Alive gets handled by iwl3945_init_alive_start()).
2458  */
2459 static void iwl3945_alive_start(struct iwl_priv *priv)
2460 {
2461         int thermal_spin = 0;
2462         u32 rfkill;
2463
2464         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2465
2466         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2467                 /* We had an error bringing up the hardware, so take it
2468                  * all the way back down so we can try again */
2469                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2470                 goto restart;
2471         }
2472
2473         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2474          * This is a paranoid check, because we would not have gotten the
2475          * "runtime" alive if code weren't properly loaded.  */
2476         if (iwl3945_verify_ucode(priv)) {
2477                 /* Runtime instruction load was bad;
2478                  * take it all the way back down so we can try again */
2479                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2480                 goto restart;
2481         }
2482
2483         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2484         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2485
2486         if (rfkill & 0x1) {
2487                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2488                 /* if RFKILL is not on, then wait for thermal
2489                  * sensor in adapter to kick in */
2490                 while (iwl3945_hw_get_temperature(priv) == 0) {
2491                         thermal_spin++;
2492                         udelay(10);
2493                 }
2494
2495                 if (thermal_spin)
2496                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2497                                        thermal_spin * 10);
2498         } else
2499                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2500
2501         /* After the ALIVE response, we can send commands to 3945 uCode */
2502         set_bit(STATUS_ALIVE, &priv->status);
2503
2504         if (priv->cfg->ops->lib->recover_from_tx_stall) {
2505                 /* Enable timer to monitor the driver queues */
2506                 mod_timer(&priv->monitor_recover,
2507                         jiffies +
2508                         msecs_to_jiffies(priv->cfg->monitor_recover_period));
2509         }
2510
2511         if (iwl_is_rfkill(priv))
2512                 return;
2513
2514         ieee80211_wake_queues(priv->hw);
2515
2516         priv->active_rate = IWL_RATES_MASK;
2517
2518         iwl_power_update_mode(priv, true);
2519
2520         if (iwl_is_associated(priv)) {
2521                 struct iwl3945_rxon_cmd *active_rxon =
2522                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2523
2524                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2525                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2526         } else {
2527                 /* Initialize our rx_config data */
2528                 iwl_connection_init_rx_config(priv, NULL);
2529         }
2530
2531         /* Configure Bluetooth device coexistence support */
2532         priv->cfg->ops->hcmd->send_bt_config(priv);
2533
2534         /* Configure the adapter for unassociated operation */
2535         iwlcore_commit_rxon(priv);
2536
2537         iwl3945_reg_txpower_periodic(priv);
2538
2539         iwl_leds_init(priv);
2540
2541         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2542         set_bit(STATUS_READY, &priv->status);
2543         wake_up_interruptible(&priv->wait_command_queue);
2544
2545         return;
2546
2547  restart:
2548         queue_work(priv->workqueue, &priv->restart);
2549 }
2550
2551 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2552
2553 static void __iwl3945_down(struct iwl_priv *priv)
2554 {
2555         unsigned long flags;
2556         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2557         struct ieee80211_conf *conf = NULL;
2558
2559         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2560
2561         conf = ieee80211_get_hw_conf(priv->hw);
2562
2563         if (!exit_pending)
2564                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2565
2566         /* Station information will now be cleared in device */
2567         iwl_clear_ucode_stations(priv);
2568         iwl_dealloc_bcast_station(priv);
2569         iwl_clear_driver_stations(priv);
2570
2571         /* Unblock any waiting calls */
2572         wake_up_interruptible_all(&priv->wait_command_queue);
2573
2574         /* Wipe out the EXIT_PENDING status bit if we are not actually
2575          * exiting the module */
2576         if (!exit_pending)
2577                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2578
2579         /* stop and reset the on-board processor */
2580         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2581
2582         /* tell the device to stop sending interrupts */
2583         spin_lock_irqsave(&priv->lock, flags);
2584         iwl_disable_interrupts(priv);
2585         spin_unlock_irqrestore(&priv->lock, flags);
2586         iwl_synchronize_irq(priv);
2587
2588         if (priv->mac80211_registered)
2589                 ieee80211_stop_queues(priv->hw);
2590
2591         /* If we have not previously called iwl3945_init() then
2592          * clear all bits but the RF Kill bits and return */
2593         if (!iwl_is_init(priv)) {
2594                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2595                                         STATUS_RF_KILL_HW |
2596                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2597                                         STATUS_GEO_CONFIGURED |
2598                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2599                                         STATUS_EXIT_PENDING;
2600                 goto exit;
2601         }
2602
2603         /* ...otherwise clear out all the status bits but the RF Kill
2604          * bit and continue taking the NIC down. */
2605         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2606                                 STATUS_RF_KILL_HW |
2607                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2608                                 STATUS_GEO_CONFIGURED |
2609                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2610                                 STATUS_FW_ERROR |
2611                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2612                                 STATUS_EXIT_PENDING;
2613
2614         iwl3945_hw_txq_ctx_stop(priv);
2615         iwl3945_hw_rxq_stop(priv);
2616
2617         /* Power-down device's busmaster DMA clocks */
2618         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2619         udelay(5);
2620
2621         /* Stop the device, and put it in low power state */
2622         priv->cfg->ops->lib->apm_ops.stop(priv);
2623
2624  exit:
2625         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2626
2627         if (priv->ibss_beacon)
2628                 dev_kfree_skb(priv->ibss_beacon);
2629         priv->ibss_beacon = NULL;
2630
2631         /* clear out any free frames */
2632         iwl3945_clear_free_frames(priv);
2633 }
2634
2635 static void iwl3945_down(struct iwl_priv *priv)
2636 {
2637         mutex_lock(&priv->mutex);
2638         __iwl3945_down(priv);
2639         mutex_unlock(&priv->mutex);
2640
2641         iwl3945_cancel_deferred_work(priv);
2642 }
2643
2644 #define MAX_HW_RESTARTS 5
2645
2646 static int __iwl3945_up(struct iwl_priv *priv)
2647 {
2648         int rc, i;
2649
2650         rc = iwl_alloc_bcast_station(priv, false);
2651         if (rc)
2652                 return rc;
2653
2654         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2655                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2656                 return -EIO;
2657         }
2658
2659         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2660                 IWL_ERR(priv, "ucode not available for device bring up\n");
2661                 return -EIO;
2662         }
2663
2664         /* If platform's RF_KILL switch is NOT set to KILL */
2665         if (iwl_read32(priv, CSR_GP_CNTRL) &
2666                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2667                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2668         else {
2669                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2670                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2671                 return -ENODEV;
2672         }
2673
2674         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2675
2676         rc = iwl3945_hw_nic_init(priv);
2677         if (rc) {
2678                 IWL_ERR(priv, "Unable to int nic\n");
2679                 return rc;
2680         }
2681
2682         /* make sure rfkill handshake bits are cleared */
2683         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2684         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2685                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2686
2687         /* clear (again), then enable host interrupts */
2688         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2689         iwl_enable_interrupts(priv);
2690
2691         /* really make sure rfkill handshake bits are cleared */
2692         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2693         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2694
2695         /* Copy original ucode data image from disk into backup cache.
2696          * This will be used to initialize the on-board processor's
2697          * data SRAM for a clean start when the runtime program first loads. */
2698         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2699                priv->ucode_data.len);
2700
2701         /* We return success when we resume from suspend and rf_kill is on. */
2702         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2703                 return 0;
2704
2705         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2706
2707                 /* load bootstrap state machine,
2708                  * load bootstrap program into processor's memory,
2709                  * prepare to load the "initialize" uCode */
2710                 rc = priv->cfg->ops->lib->load_ucode(priv);
2711
2712                 if (rc) {
2713                         IWL_ERR(priv,
2714                                 "Unable to set up bootstrap uCode: %d\n", rc);
2715                         continue;
2716                 }
2717
2718                 /* start card; "initialize" will load runtime ucode */
2719                 iwl3945_nic_start(priv);
2720
2721                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2722
2723                 return 0;
2724         }
2725
2726         set_bit(STATUS_EXIT_PENDING, &priv->status);
2727         __iwl3945_down(priv);
2728         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2729
2730         /* tried to restart and config the device for as long as our
2731          * patience could withstand */
2732         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2733         return -EIO;
2734 }
2735
2736
2737 /*****************************************************************************
2738  *
2739  * Workqueue callbacks
2740  *
2741  *****************************************************************************/
2742
2743 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2744 {
2745         struct iwl_priv *priv =
2746             container_of(data, struct iwl_priv, init_alive_start.work);
2747
2748         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2749                 return;
2750
2751         mutex_lock(&priv->mutex);
2752         iwl3945_init_alive_start(priv);
2753         mutex_unlock(&priv->mutex);
2754 }
2755
2756 static void iwl3945_bg_alive_start(struct work_struct *data)
2757 {
2758         struct iwl_priv *priv =
2759             container_of(data, struct iwl_priv, alive_start.work);
2760
2761         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2762                 return;
2763
2764         mutex_lock(&priv->mutex);
2765         iwl3945_alive_start(priv);
2766         mutex_unlock(&priv->mutex);
2767 }
2768
2769 /*
2770  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2771  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2772  * *is* readable even when device has been SW_RESET into low power mode
2773  * (e.g. during RF KILL).
2774  */
2775 static void iwl3945_rfkill_poll(struct work_struct *data)
2776 {
2777         struct iwl_priv *priv =
2778             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2779         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2780         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2781                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2782
2783         if (new_rfkill != old_rfkill) {
2784                 if (new_rfkill)
2785                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2786                 else
2787                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2788
2789                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2790
2791                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2792                                 new_rfkill ? "disable radio" : "enable radio");
2793         }
2794
2795         /* Keep this running, even if radio now enabled.  This will be
2796          * cancelled in mac_start() if system decides to start again */
2797         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2798                            round_jiffies_relative(2 * HZ));
2799
2800 }
2801
2802 void iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2803 {
2804         struct iwl_host_cmd cmd = {
2805                 .id = REPLY_SCAN_CMD,
2806                 .len = sizeof(struct iwl3945_scan_cmd),
2807                 .flags = CMD_SIZE_HUGE,
2808         };
2809         struct iwl3945_scan_cmd *scan;
2810         struct ieee80211_conf *conf = NULL;
2811         u8 n_probes = 0;
2812         enum ieee80211_band band;
2813         bool is_active = false;
2814
2815         conf = ieee80211_get_hw_conf(priv->hw);
2816
2817         cancel_delayed_work(&priv->scan_check);
2818
2819         if (!iwl_is_ready(priv)) {
2820                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2821                 goto done;
2822         }
2823
2824         /* Make sure the scan wasn't canceled before this queued work
2825          * was given the chance to run... */
2826         if (!test_bit(STATUS_SCANNING, &priv->status))
2827                 goto done;
2828
2829         /* This should never be called or scheduled if there is currently
2830          * a scan active in the hardware. */
2831         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2832                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2833                                 "Ignoring second request.\n");
2834                 goto done;
2835         }
2836
2837         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2838                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2839                 goto done;
2840         }
2841
2842         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2843                 IWL_DEBUG_HC(priv,
2844                         "Scan request while abort pending. Queuing.\n");
2845                 goto done;
2846         }
2847
2848         if (iwl_is_rfkill(priv)) {
2849                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2850                 goto done;
2851         }
2852
2853         if (!test_bit(STATUS_READY, &priv->status)) {
2854                 IWL_DEBUG_HC(priv,
2855                         "Scan request while uninitialized. Queuing.\n");
2856                 goto done;
2857         }
2858
2859         if (!priv->scan_cmd) {
2860                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2861                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2862                 if (!priv->scan_cmd) {
2863                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2864                         goto done;
2865                 }
2866         }
2867         scan = priv->scan_cmd;
2868         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2869
2870         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2871         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2872
2873         if (iwl_is_associated(priv)) {
2874                 u16 interval = 0;
2875                 u32 extra;
2876                 u32 suspend_time = 100;
2877                 u32 scan_suspend_time = 100;
2878                 unsigned long flags;
2879
2880                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2881
2882                 spin_lock_irqsave(&priv->lock, flags);
2883                 if (priv->is_internal_short_scan)
2884                         interval = 0;
2885                 else
2886                         interval = vif->bss_conf.beacon_int;
2887                 spin_unlock_irqrestore(&priv->lock, flags);
2888
2889                 scan->suspend_time = 0;
2890                 scan->max_out_time = cpu_to_le32(200 * 1024);
2891                 if (!interval)
2892                         interval = suspend_time;
2893                 /*
2894                  * suspend time format:
2895                  *  0-19: beacon interval in usec (time before exec.)
2896                  * 20-23: 0
2897                  * 24-31: number of beacons (suspend between channels)
2898                  */
2899
2900                 extra = (suspend_time / interval) << 24;
2901                 scan_suspend_time = 0xFF0FFFFF &
2902                     (extra | ((suspend_time % interval) * 1024));
2903
2904                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2905                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2906                                scan_suspend_time, interval);
2907         }
2908
2909         if (priv->is_internal_short_scan) {
2910                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2911         } else if (priv->scan_request->n_ssids) {
2912                 int i, p = 0;
2913                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2914                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2915                         /* always does wildcard anyway */
2916                         if (!priv->scan_request->ssids[i].ssid_len)
2917                                 continue;
2918                         scan->direct_scan[p].id = WLAN_EID_SSID;
2919                         scan->direct_scan[p].len =
2920                                 priv->scan_request->ssids[i].ssid_len;
2921                         memcpy(scan->direct_scan[p].ssid,
2922                                priv->scan_request->ssids[i].ssid,
2923                                priv->scan_request->ssids[i].ssid_len);
2924                         n_probes++;
2925                         p++;
2926                 }
2927                 is_active = true;
2928         } else
2929                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2930
2931         /* We don't build a direct scan probe request; the uCode will do
2932          * that based on the direct_mask added to each channel entry */
2933         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2934         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2935         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2936
2937         /* flags + rate selection */
2938
2939         switch (priv->scan_band) {
2940         case IEEE80211_BAND_2GHZ:
2941                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2942                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2943                 scan->good_CRC_th = 0;
2944                 band = IEEE80211_BAND_2GHZ;
2945                 break;
2946         case IEEE80211_BAND_5GHZ:
2947                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2948                 /*
2949                  * If active scaning is requested but a certain channel
2950                  * is marked passive, we can do active scanning if we
2951                  * detect transmissions.
2952                  */
2953                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2954                                                 IWL_GOOD_CRC_TH_DISABLED;
2955                 band = IEEE80211_BAND_5GHZ;
2956                 break;
2957         default:
2958                 IWL_WARN(priv, "Invalid scan band\n");
2959                 goto done;
2960         }
2961
2962         if (!priv->is_internal_short_scan) {
2963                 scan->tx_cmd.len = cpu_to_le16(
2964                         iwl_fill_probe_req(priv,
2965                                 (struct ieee80211_mgmt *)scan->data,
2966                                 vif->addr,
2967                                 priv->scan_request->ie,
2968                                 priv->scan_request->ie_len,
2969                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2970         } else {
2971                 /* use bcast addr, will not be transmitted but must be valid */
2972                 scan->tx_cmd.len = cpu_to_le16(
2973                         iwl_fill_probe_req(priv,
2974                                 (struct ieee80211_mgmt *)scan->data,
2975                                 iwl_bcast_addr, NULL, 0,
2976                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2977         }
2978         /* select Rx antennas */
2979         scan->flags |= iwl3945_get_antenna_flags(priv);
2980
2981         if (priv->is_internal_short_scan) {
2982                 scan->channel_count =
2983                         iwl3945_get_single_channel_for_scan(priv, vif, band,
2984                                 (void *)&scan->data[le16_to_cpu(
2985                                 scan->tx_cmd.len)]);
2986         } else {
2987                 scan->channel_count =
2988                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2989                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2990         }
2991
2992         if (scan->channel_count == 0) {
2993                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2994                 goto done;
2995         }
2996
2997         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2998             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2999         cmd.data = scan;
3000         scan->len = cpu_to_le16(cmd.len);
3001
3002         set_bit(STATUS_SCAN_HW, &priv->status);
3003         if (iwl_send_cmd_sync(priv, &cmd))
3004                 goto done;
3005
3006         queue_delayed_work(priv->workqueue, &priv->scan_check,
3007                            IWL_SCAN_CHECK_WATCHDOG);
3008
3009         return;
3010
3011  done:
3012         /* can not perform scan make sure we clear scanning
3013          * bits from status so next scan request can be performed.
3014          * if we dont clear scanning status bit here all next scan
3015          * will fail
3016         */
3017         clear_bit(STATUS_SCAN_HW, &priv->status);
3018         clear_bit(STATUS_SCANNING, &priv->status);
3019
3020         /* inform mac80211 scan aborted */
3021         queue_work(priv->workqueue, &priv->abort_scan);
3022 }
3023
3024 static void iwl3945_bg_restart(struct work_struct *data)
3025 {
3026         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3027
3028         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3029                 return;
3030
3031         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3032                 mutex_lock(&priv->mutex);
3033                 priv->vif = NULL;
3034                 priv->is_open = 0;
3035                 mutex_unlock(&priv->mutex);
3036                 iwl3945_down(priv);
3037                 ieee80211_restart_hw(priv->hw);
3038         } else {
3039                 iwl3945_down(priv);
3040
3041                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3042                         return;
3043
3044                 mutex_lock(&priv->mutex);
3045                 __iwl3945_up(priv);
3046                 mutex_unlock(&priv->mutex);
3047         }
3048 }
3049
3050 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3051 {
3052         struct iwl_priv *priv =
3053             container_of(data, struct iwl_priv, rx_replenish);
3054
3055         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3056                 return;
3057
3058         mutex_lock(&priv->mutex);
3059         iwl3945_rx_replenish(priv);
3060         mutex_unlock(&priv->mutex);
3061 }
3062
3063 void iwl3945_post_associate(struct iwl_priv *priv, struct ieee80211_vif *vif)
3064 {
3065         int rc = 0;
3066         struct ieee80211_conf *conf = NULL;
3067
3068         if (!vif || !priv->is_open)
3069                 return;
3070
3071         if (vif->type == NL80211_IFTYPE_AP) {
3072                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3073                 return;
3074         }
3075
3076         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3077                         vif->bss_conf.aid, priv->active_rxon.bssid_addr);
3078
3079         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3080                 return;
3081
3082         iwl_scan_cancel_timeout(priv, 200);
3083
3084         conf = ieee80211_get_hw_conf(priv->hw);
3085
3086         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3087         iwlcore_commit_rxon(priv);
3088
3089         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3090         iwl_setup_rxon_timing(priv, vif);
3091         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3092                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3093         if (rc)
3094                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3095                             "Attempting to continue.\n");
3096
3097         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3098
3099         priv->staging_rxon.assoc_id = cpu_to_le16(vif->bss_conf.aid);
3100
3101         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3102                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
3103
3104         if (vif->bss_conf.use_short_preamble)
3105                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3106         else
3107                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3108
3109         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3110                 if (vif->bss_conf.use_short_slot)
3111                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3112                 else
3113                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3114         }
3115
3116         iwlcore_commit_rxon(priv);
3117
3118         switch (vif->type) {
3119         case NL80211_IFTYPE_STATION:
3120                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3121                 break;
3122         case NL80211_IFTYPE_ADHOC:
3123                 iwl3945_send_beacon_cmd(priv);
3124                 break;
3125         default:
3126                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3127                         __func__, vif->type);
3128                 break;
3129         }
3130 }
3131
3132 /*****************************************************************************
3133  *
3134  * mac80211 entry point functions
3135  *
3136  *****************************************************************************/
3137
3138 #define UCODE_READY_TIMEOUT     (2 * HZ)
3139
3140 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3141 {
3142         struct iwl_priv *priv = hw->priv;
3143         int ret;
3144
3145         IWL_DEBUG_MAC80211(priv, "enter\n");
3146
3147         /* we should be verifying the device is ready to be opened */
3148         mutex_lock(&priv->mutex);
3149
3150         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3151          * ucode filename and max sizes are card-specific. */
3152
3153         if (!priv->ucode_code.len) {
3154                 ret = iwl3945_read_ucode(priv);
3155                 if (ret) {
3156                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3157                         mutex_unlock(&priv->mutex);
3158                         goto out_release_irq;
3159                 }
3160         }
3161
3162         ret = __iwl3945_up(priv);
3163
3164         mutex_unlock(&priv->mutex);
3165
3166         if (ret)
3167                 goto out_release_irq;
3168
3169         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3170
3171         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3172          * mac80211 will not be run successfully. */
3173         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3174                         test_bit(STATUS_READY, &priv->status),
3175                         UCODE_READY_TIMEOUT);
3176         if (!ret) {
3177                 if (!test_bit(STATUS_READY, &priv->status)) {
3178                         IWL_ERR(priv,
3179                                 "Wait for START_ALIVE timeout after %dms.\n",
3180                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3181                         ret = -ETIMEDOUT;
3182                         goto out_release_irq;
3183                 }
3184         }
3185
3186         /* ucode is running and will send rfkill notifications,
3187          * no need to poll the killswitch state anymore */
3188         cancel_delayed_work(&priv->_3945.rfkill_poll);
3189
3190         iwl_led_start(priv);
3191
3192         priv->is_open = 1;
3193         IWL_DEBUG_MAC80211(priv, "leave\n");
3194         return 0;
3195
3196 out_release_irq:
3197         priv->is_open = 0;
3198         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3199         return ret;
3200 }
3201
3202 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3203 {
3204         struct iwl_priv *priv = hw->priv;
3205
3206         IWL_DEBUG_MAC80211(priv, "enter\n");
3207
3208         if (!priv->is_open) {
3209                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3210                 return;
3211         }
3212
3213         priv->is_open = 0;
3214
3215         if (iwl_is_ready_rf(priv)) {
3216                 /* stop mac, cancel any scan request and clear
3217                  * RXON_FILTER_ASSOC_MSK BIT
3218                  */
3219                 mutex_lock(&priv->mutex);
3220                 iwl_scan_cancel_timeout(priv, 100);
3221                 mutex_unlock(&priv->mutex);
3222         }
3223
3224         iwl3945_down(priv);
3225
3226         flush_workqueue(priv->workqueue);
3227
3228         /* start polling the killswitch state again */
3229         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3230                            round_jiffies_relative(2 * HZ));
3231
3232         IWL_DEBUG_MAC80211(priv, "leave\n");
3233 }
3234
3235 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3236 {
3237         struct iwl_priv *priv = hw->priv;
3238
3239         IWL_DEBUG_MAC80211(priv, "enter\n");
3240
3241         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3242                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3243
3244         if (iwl3945_tx_skb(priv, skb))
3245                 dev_kfree_skb_any(skb);
3246
3247         IWL_DEBUG_MAC80211(priv, "leave\n");
3248         return NETDEV_TX_OK;
3249 }
3250
3251 void iwl3945_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
3252 {
3253         int rc = 0;
3254
3255         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3256                 return;
3257
3258         /* The following should be done only at AP bring up */
3259         if (!(iwl_is_associated(priv))) {
3260
3261                 /* RXON - unassoc (to set timing command) */
3262                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3263                 iwlcore_commit_rxon(priv);
3264
3265                 /* RXON Timing */
3266                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3267                 iwl_setup_rxon_timing(priv, vif);
3268                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3269                                       sizeof(priv->rxon_timing),
3270                                       &priv->rxon_timing);
3271                 if (rc)
3272                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3273                                         "Attempting to continue.\n");
3274
3275                 priv->staging_rxon.assoc_id = 0;
3276
3277                 if (vif->bss_conf.use_short_preamble)
3278                         priv->staging_rxon.flags |=
3279                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3280                 else
3281                         priv->staging_rxon.flags &=
3282                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3283
3284                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3285                         if (vif->bss_conf.use_short_slot)
3286                                 priv->staging_rxon.flags |=
3287                                         RXON_FLG_SHORT_SLOT_MSK;
3288                         else
3289                                 priv->staging_rxon.flags &=
3290                                         ~RXON_FLG_SHORT_SLOT_MSK;
3291                 }
3292                 /* restore RXON assoc */
3293                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3294                 iwlcore_commit_rxon(priv);
3295         }
3296         iwl3945_send_beacon_cmd(priv);
3297
3298         /* FIXME - we need to add code here to detect a totally new
3299          * configuration, reset the AP, unassoc, rxon timing, assoc,
3300          * clear sta table, add BCAST sta... */
3301 }
3302
3303 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3304                                struct ieee80211_vif *vif,
3305                                struct ieee80211_sta *sta,
3306                                struct ieee80211_key_conf *key)
3307 {
3308         struct iwl_priv *priv = hw->priv;
3309         int ret = 0;
3310         u8 sta_id = IWL_INVALID_STATION;
3311         u8 static_key;
3312
3313         IWL_DEBUG_MAC80211(priv, "enter\n");
3314
3315         if (iwl3945_mod_params.sw_crypto) {
3316                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3317                 return -EOPNOTSUPP;
3318         }
3319
3320         static_key = !iwl_is_associated(priv);
3321
3322         if (!static_key) {
3323                 sta_id = iwl_sta_id_or_broadcast(priv, sta);
3324                 if (sta_id == IWL_INVALID_STATION)
3325                         return -EINVAL;
3326         }
3327
3328         mutex_lock(&priv->mutex);
3329         iwl_scan_cancel_timeout(priv, 100);
3330
3331         switch (cmd) {
3332         case SET_KEY:
3333                 if (static_key)
3334                         ret = iwl3945_set_static_key(priv, key);
3335                 else
3336                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3337                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3338                 break;
3339         case DISABLE_KEY:
3340                 if (static_key)
3341                         ret = iwl3945_remove_static_key(priv);
3342                 else
3343                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3344                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3345                 break;
3346         default:
3347                 ret = -EINVAL;
3348         }
3349
3350         mutex_unlock(&priv->mutex);
3351         IWL_DEBUG_MAC80211(priv, "leave\n");
3352
3353         return ret;
3354 }
3355
3356 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3357                                struct ieee80211_vif *vif,
3358                                struct ieee80211_sta *sta)
3359 {
3360         struct iwl_priv *priv = hw->priv;
3361         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3362         int ret;
3363         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3364         u8 sta_id;
3365
3366         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3367                         sta->addr);
3368         mutex_lock(&priv->mutex);
3369         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
3370                         sta->addr);
3371         sta_priv->common.sta_id = IWL_INVALID_STATION;
3372
3373
3374         ret = iwl_add_station_common(priv, sta->addr, is_ap, &sta->ht_cap,
3375                                      &sta_id);
3376         if (ret) {
3377                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3378                         sta->addr, ret);
3379                 /* Should we return success if return code is EEXIST ? */
3380                 mutex_unlock(&priv->mutex);
3381                 return ret;
3382         }
3383
3384         sta_priv->common.sta_id = sta_id;
3385
3386         /* Initialize rate scaling */
3387         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3388                        sta->addr);
3389         iwl3945_rs_rate_init(priv, sta, sta_id);
3390         mutex_unlock(&priv->mutex);
3391
3392         return 0;
3393 }
3394
3395 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
3396                                      unsigned int changed_flags,
3397                                      unsigned int *total_flags,
3398                                      u64 multicast)
3399 {
3400         struct iwl_priv *priv = hw->priv;
3401         __le32 filter_or = 0, filter_nand = 0;
3402
3403 #define CHK(test, flag) do { \
3404         if (*total_flags & (test))              \
3405                 filter_or |= (flag);            \
3406         else                                    \
3407                 filter_nand |= (flag);          \
3408         } while (0)
3409
3410         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3411                         changed_flags, *total_flags);
3412
3413         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3414         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3415         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3416
3417 #undef CHK
3418
3419         mutex_lock(&priv->mutex);
3420
3421         priv->staging_rxon.filter_flags &= ~filter_nand;
3422         priv->staging_rxon.filter_flags |= filter_or;
3423
3424         /*
3425          * Committing directly here breaks for some reason,
3426          * but we'll eventually commit the filter flags
3427          * change anyway.
3428          */
3429
3430         mutex_unlock(&priv->mutex);
3431
3432         /*
3433          * Receiving all multicast frames is always enabled by the
3434          * default flags setup in iwl_connection_init_rx_config()
3435          * since we currently do not support programming multicast
3436          * filters into the device.
3437          */
3438         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3439                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3440 }
3441
3442
3443 /*****************************************************************************
3444  *
3445  * sysfs attributes
3446  *
3447  *****************************************************************************/
3448
3449 #ifdef CONFIG_IWLWIFI_DEBUG
3450
3451 /*
3452  * The following adds a new attribute to the sysfs representation
3453  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3454  * used for controlling the debug level.
3455  *
3456  * See the level definitions in iwl for details.
3457  *
3458  * The debug_level being managed using sysfs below is a per device debug
3459  * level that is used instead of the global debug level if it (the per
3460  * device debug level) is set.
3461  */
3462 static ssize_t show_debug_level(struct device *d,
3463                                 struct device_attribute *attr, char *buf)
3464 {
3465         struct iwl_priv *priv = dev_get_drvdata(d);
3466         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3467 }
3468 static ssize_t store_debug_level(struct device *d,
3469                                 struct device_attribute *attr,
3470                                  const char *buf, size_t count)
3471 {
3472         struct iwl_priv *priv = dev_get_drvdata(d);
3473         unsigned long val;
3474         int ret;
3475
3476         ret = strict_strtoul(buf, 0, &val);
3477         if (ret)
3478                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3479         else {
3480                 priv->debug_level = val;
3481                 if (iwl_alloc_traffic_mem(priv))
3482                         IWL_ERR(priv,
3483                                 "Not enough memory to generate traffic log\n");
3484         }
3485         return strnlen(buf, count);
3486 }
3487
3488 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3489                         show_debug_level, store_debug_level);
3490
3491 #endif /* CONFIG_IWLWIFI_DEBUG */
3492
3493 static ssize_t show_temperature(struct device *d,
3494                                 struct device_attribute *attr, char *buf)
3495 {
3496         struct iwl_priv *priv = dev_get_drvdata(d);
3497
3498         if (!iwl_is_alive(priv))
3499                 return -EAGAIN;
3500
3501         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3502 }
3503
3504 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3505
3506 static ssize_t show_tx_power(struct device *d,
3507                              struct device_attribute *attr, char *buf)
3508 {
3509         struct iwl_priv *priv = dev_get_drvdata(d);
3510         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3511 }
3512
3513 static ssize_t store_tx_power(struct device *d,
3514                               struct device_attribute *attr,
3515                               const char *buf, size_t count)
3516 {
3517         struct iwl_priv *priv = dev_get_drvdata(d);
3518         char *p = (char *)buf;
3519         u32 val;
3520
3521         val = simple_strtoul(p, &p, 10);
3522         if (p == buf)
3523                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3524         else
3525                 iwl3945_hw_reg_set_txpower(priv, val);
3526
3527         return count;
3528 }
3529
3530 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3531
3532 static ssize_t show_flags(struct device *d,
3533                           struct device_attribute *attr, char *buf)
3534 {
3535         struct iwl_priv *priv = dev_get_drvdata(d);
3536
3537         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3538 }
3539
3540 static ssize_t store_flags(struct device *d,
3541                            struct device_attribute *attr,
3542                            const char *buf, size_t count)
3543 {
3544         struct iwl_priv *priv = dev_get_drvdata(d);
3545         u32 flags = simple_strtoul(buf, NULL, 0);
3546
3547         mutex_lock(&priv->mutex);
3548         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3549                 /* Cancel any currently running scans... */
3550                 if (iwl_scan_cancel_timeout(priv, 100))
3551                         IWL_WARN(priv, "Could not cancel scan.\n");
3552                 else {
3553                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3554                                        flags);
3555                         priv->staging_rxon.flags = cpu_to_le32(flags);
3556                         iwlcore_commit_rxon(priv);
3557                 }
3558         }
3559         mutex_unlock(&priv->mutex);
3560
3561         return count;
3562 }
3563
3564 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3565
3566 static ssize_t show_filter_flags(struct device *d,
3567                                  struct device_attribute *attr, char *buf)
3568 {
3569         struct iwl_priv *priv = dev_get_drvdata(d);
3570
3571         return sprintf(buf, "0x%04X\n",
3572                 le32_to_cpu(priv->active_rxon.filter_flags));
3573 }
3574
3575 static ssize_t store_filter_flags(struct device *d,
3576                                   struct device_attribute *attr,
3577                                   const char *buf, size_t count)
3578 {
3579         struct iwl_priv *priv = dev_get_drvdata(d);
3580         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3581
3582         mutex_lock(&priv->mutex);
3583         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3584                 /* Cancel any currently running scans... */
3585                 if (iwl_scan_cancel_timeout(priv, 100))
3586                         IWL_WARN(priv, "Could not cancel scan.\n");
3587                 else {
3588                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3589                                        "0x%04X\n", filter_flags);
3590                         priv->staging_rxon.filter_flags =
3591                                 cpu_to_le32(filter_flags);
3592                         iwlcore_commit_rxon(priv);
3593                 }
3594         }
3595         mutex_unlock(&priv->mutex);
3596
3597         return count;
3598 }
3599
3600 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3601                    store_filter_flags);
3602
3603 static ssize_t show_measurement(struct device *d,
3604                                 struct device_attribute *attr, char *buf)
3605 {
3606         struct iwl_priv *priv = dev_get_drvdata(d);
3607         struct iwl_spectrum_notification measure_report;
3608         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3609         u8 *data = (u8 *)&measure_report;
3610         unsigned long flags;
3611
3612         spin_lock_irqsave(&priv->lock, flags);
3613         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3614                 spin_unlock_irqrestore(&priv->lock, flags);
3615                 return 0;
3616         }
3617         memcpy(&measure_report, &priv->measure_report, size);
3618         priv->measurement_status = 0;
3619         spin_unlock_irqrestore(&priv->lock, flags);
3620
3621         while (size && (PAGE_SIZE - len)) {
3622                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3623                                    PAGE_SIZE - len, 1);
3624                 len = strlen(buf);
3625                 if (PAGE_SIZE - len)
3626                         buf[len++] = '\n';
3627
3628                 ofs += 16;
3629                 size -= min(size, 16U);
3630         }
3631
3632         return len;
3633 }
3634
3635 static ssize_t store_measurement(struct device *d,
3636                                  struct device_attribute *attr,
3637                                  const char *buf, size_t count)
3638 {
3639         struct iwl_priv *priv = dev_get_drvdata(d);
3640         struct ieee80211_measurement_params params = {
3641                 .channel = le16_to_cpu(priv->active_rxon.channel),
3642                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3643                 .duration = cpu_to_le16(1),
3644         };
3645         u8 type = IWL_MEASURE_BASIC;
3646         u8 buffer[32];
3647         u8 channel;
3648
3649         if (count) {
3650                 char *p = buffer;
3651                 strncpy(buffer, buf, min(sizeof(buffer), count));
3652                 channel = simple_strtoul(p, NULL, 0);
3653                 if (channel)
3654                         params.channel = channel;
3655
3656                 p = buffer;
3657                 while (*p && *p != ' ')
3658                         p++;
3659                 if (*p)
3660                         type = simple_strtoul(p + 1, NULL, 0);
3661         }
3662
3663         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3664                        "channel %d (for '%s')\n", type, params.channel, buf);
3665         iwl3945_get_measurement(priv, &params, type);
3666
3667         return count;
3668 }
3669
3670 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3671                    show_measurement, store_measurement);
3672
3673 static ssize_t store_retry_rate(struct device *d,
3674                                 struct device_attribute *attr,
3675                                 const char *buf, size_t count)
3676 {
3677         struct iwl_priv *priv = dev_get_drvdata(d);
3678
3679         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3680         if (priv->retry_rate <= 0)
3681                 priv->retry_rate = 1;
3682
3683         return count;
3684 }
3685
3686 static ssize_t show_retry_rate(struct device *d,
3687                                struct device_attribute *attr, char *buf)
3688 {
3689         struct iwl_priv *priv = dev_get_drvdata(d);
3690         return sprintf(buf, "%d", priv->retry_rate);
3691 }
3692
3693 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3694                    store_retry_rate);
3695
3696
3697 static ssize_t show_channels(struct device *d,
3698                              struct device_attribute *attr, char *buf)
3699 {
3700         /* all this shit doesn't belong into sysfs anyway */
3701         return 0;
3702 }
3703
3704 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3705
3706 static ssize_t show_antenna(struct device *d,
3707                             struct device_attribute *attr, char *buf)
3708 {
3709         struct iwl_priv *priv = dev_get_drvdata(d);
3710
3711         if (!iwl_is_alive(priv))
3712                 return -EAGAIN;
3713
3714         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3715 }
3716
3717 static ssize_t store_antenna(struct device *d,
3718                              struct device_attribute *attr,
3719                              const char *buf, size_t count)
3720 {
3721         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3722         int ant;
3723
3724         if (count == 0)
3725                 return 0;
3726
3727         if (sscanf(buf, "%1i", &ant) != 1) {
3728                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3729                 return count;
3730         }
3731
3732         if ((ant >= 0) && (ant <= 2)) {
3733                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3734                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3735         } else
3736                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3737
3738
3739         return count;
3740 }
3741
3742 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3743
3744 static ssize_t show_status(struct device *d,
3745                            struct device_attribute *attr, char *buf)
3746 {
3747         struct iwl_priv *priv = dev_get_drvdata(d);
3748         if (!iwl_is_alive(priv))
3749                 return -EAGAIN;
3750         return sprintf(buf, "0x%08x\n", (int)priv->status);
3751 }
3752
3753 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3754
3755 static ssize_t dump_error_log(struct device *d,
3756                               struct device_attribute *attr,
3757                               const char *buf, size_t count)
3758 {
3759         struct iwl_priv *priv = dev_get_drvdata(d);
3760         char *p = (char *)buf;
3761
3762         if (p[0] == '1')
3763                 iwl3945_dump_nic_error_log(priv);
3764
3765         return strnlen(buf, count);
3766 }
3767
3768 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3769
3770 /*****************************************************************************
3771  *
3772  * driver setup and tear down
3773  *
3774  *****************************************************************************/
3775
3776 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3777 {
3778         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3779
3780         init_waitqueue_head(&priv->wait_command_queue);
3781
3782         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3783         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3784         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3785         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3786         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3787         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3788         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3789         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3790         INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
3791         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3792
3793         iwl3945_hw_setup_deferred_work(priv);
3794
3795         if (priv->cfg->ops->lib->recover_from_tx_stall) {
3796                 init_timer(&priv->monitor_recover);
3797                 priv->monitor_recover.data = (unsigned long)priv;
3798                 priv->monitor_recover.function =
3799                         priv->cfg->ops->lib->recover_from_tx_stall;
3800         }
3801
3802         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3803                      iwl3945_irq_tasklet, (unsigned long)priv);
3804 }
3805
3806 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3807 {
3808         iwl3945_hw_cancel_deferred_work(priv);
3809
3810         cancel_delayed_work_sync(&priv->init_alive_start);
3811         cancel_delayed_work(&priv->scan_check);
3812         cancel_delayed_work(&priv->alive_start);
3813         cancel_work_sync(&priv->start_internal_scan);
3814         cancel_work_sync(&priv->beacon_update);
3815         if (priv->cfg->ops->lib->recover_from_tx_stall)
3816                 del_timer_sync(&priv->monitor_recover);
3817 }
3818
3819 static struct attribute *iwl3945_sysfs_entries[] = {
3820         &dev_attr_antenna.attr,
3821         &dev_attr_channels.attr,
3822         &dev_attr_dump_errors.attr,
3823         &dev_attr_flags.attr,
3824         &dev_attr_filter_flags.attr,
3825         &dev_attr_measurement.attr,
3826         &dev_attr_retry_rate.attr,
3827         &dev_attr_status.attr,
3828         &dev_attr_temperature.attr,
3829         &dev_attr_tx_power.attr,
3830 #ifdef CONFIG_IWLWIFI_DEBUG
3831         &dev_attr_debug_level.attr,
3832 #endif
3833         NULL
3834 };
3835
3836 static struct attribute_group iwl3945_attribute_group = {
3837         .name = NULL,           /* put in device directory */
3838         .attrs = iwl3945_sysfs_entries,
3839 };
3840
3841 static struct ieee80211_ops iwl3945_hw_ops = {
3842         .tx = iwl3945_mac_tx,
3843         .start = iwl3945_mac_start,
3844         .stop = iwl3945_mac_stop,
3845         .add_interface = iwl_mac_add_interface,
3846         .remove_interface = iwl_mac_remove_interface,
3847         .config = iwl_mac_config,
3848         .configure_filter = iwl3945_configure_filter,
3849         .set_key = iwl3945_mac_set_key,
3850         .conf_tx = iwl_mac_conf_tx,
3851         .reset_tsf = iwl_mac_reset_tsf,
3852         .bss_info_changed = iwl_bss_info_changed,
3853         .hw_scan = iwl_mac_hw_scan,
3854         .sta_add = iwl3945_mac_sta_add,
3855         .sta_remove = iwl_mac_sta_remove,
3856 };
3857
3858 static int iwl3945_init_drv(struct iwl_priv *priv)
3859 {
3860         int ret;
3861         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3862
3863         priv->retry_rate = 1;
3864         priv->ibss_beacon = NULL;
3865
3866         spin_lock_init(&priv->sta_lock);
3867         spin_lock_init(&priv->hcmd_lock);
3868
3869         INIT_LIST_HEAD(&priv->free_frames);
3870
3871         mutex_init(&priv->mutex);
3872         mutex_init(&priv->sync_cmd_mutex);
3873
3874         priv->ieee_channels = NULL;
3875         priv->ieee_rates = NULL;
3876         priv->band = IEEE80211_BAND_2GHZ;
3877
3878         priv->iw_mode = NL80211_IFTYPE_STATION;
3879         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3880
3881         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3882
3883         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3884                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3885                          eeprom->version);
3886                 ret = -EINVAL;
3887                 goto err;
3888         }
3889         ret = iwl_init_channel_map(priv);
3890         if (ret) {
3891                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3892                 goto err;
3893         }
3894
3895         /* Set up txpower settings in driver for all channels */
3896         if (iwl3945_txpower_set_from_eeprom(priv)) {
3897                 ret = -EIO;
3898                 goto err_free_channel_map;
3899         }
3900
3901         ret = iwlcore_init_geos(priv);
3902         if (ret) {
3903                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3904                 goto err_free_channel_map;
3905         }
3906         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3907
3908         return 0;
3909
3910 err_free_channel_map:
3911         iwl_free_channel_map(priv);
3912 err:
3913         return ret;
3914 }
3915
3916 #define IWL3945_MAX_PROBE_REQUEST       200
3917
3918 static int iwl3945_setup_mac(struct iwl_priv *priv)
3919 {
3920         int ret;
3921         struct ieee80211_hw *hw = priv->hw;
3922
3923         hw->rate_control_algorithm = "iwl-3945-rs";
3924         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3925         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3926
3927         /* Tell mac80211 our characteristics */
3928         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3929                     IEEE80211_HW_SPECTRUM_MGMT;
3930
3931         if (!priv->cfg->broken_powersave)
3932                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3933                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3934
3935         hw->wiphy->interface_modes =
3936                 BIT(NL80211_IFTYPE_STATION) |
3937                 BIT(NL80211_IFTYPE_ADHOC);
3938
3939         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3940                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3941
3942         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3943         /* we create the 802.11 header and a zero-length SSID element */
3944         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3945
3946         /* Default value; 4 EDCA QOS priorities */
3947         hw->queues = 4;
3948
3949         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3950                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3951                         &priv->bands[IEEE80211_BAND_2GHZ];
3952
3953         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3954                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3955                         &priv->bands[IEEE80211_BAND_5GHZ];
3956
3957         ret = ieee80211_register_hw(priv->hw);
3958         if (ret) {
3959                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3960                 return ret;
3961         }
3962         priv->mac80211_registered = 1;
3963
3964         return 0;
3965 }
3966
3967 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3968 {
3969         int err = 0;
3970         struct iwl_priv *priv;
3971         struct ieee80211_hw *hw;
3972         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3973         struct iwl3945_eeprom *eeprom;
3974         unsigned long flags;
3975
3976         /***********************
3977          * 1. Allocating HW data
3978          * ********************/
3979
3980         /* mac80211 allocates memory for this device instance, including
3981          *   space for this driver's private structure */
3982         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3983         if (hw == NULL) {
3984                 pr_err("Can not allocate network device\n");
3985                 err = -ENOMEM;
3986                 goto out;
3987         }
3988         priv = hw->priv;
3989         SET_IEEE80211_DEV(hw, &pdev->dev);
3990
3991         /*
3992          * Disabling hardware scan means that mac80211 will perform scans
3993          * "the hard way", rather than using device's scan.
3994          */
3995         if (iwl3945_mod_params.disable_hw_scan) {
3996                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3997                 iwl3945_hw_ops.hw_scan = NULL;
3998         }
3999
4000
4001         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4002         priv->cfg = cfg;
4003         priv->pci_dev = pdev;
4004         priv->inta_mask = CSR_INI_SET_MASK;
4005
4006         if (iwl_alloc_traffic_mem(priv))
4007                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4008
4009         /***************************
4010          * 2. Initializing PCI bus
4011          * *************************/
4012         if (pci_enable_device(pdev)) {
4013                 err = -ENODEV;
4014                 goto out_ieee80211_free_hw;
4015         }
4016
4017         pci_set_master(pdev);
4018
4019         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4020         if (!err)
4021                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4022         if (err) {
4023                 IWL_WARN(priv, "No suitable DMA available.\n");
4024                 goto out_pci_disable_device;
4025         }
4026
4027         pci_set_drvdata(pdev, priv);
4028         err = pci_request_regions(pdev, DRV_NAME);
4029         if (err)
4030                 goto out_pci_disable_device;
4031
4032         /***********************
4033          * 3. Read REV Register
4034          * ********************/
4035         priv->hw_base = pci_iomap(pdev, 0, 0);
4036         if (!priv->hw_base) {
4037                 err = -ENODEV;
4038                 goto out_pci_release_regions;
4039         }
4040
4041         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4042                         (unsigned long long) pci_resource_len(pdev, 0));
4043         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4044
4045         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4046          * PCI Tx retries from interfering with C3 CPU state */
4047         pci_write_config_byte(pdev, 0x41, 0x00);
4048
4049         /* these spin locks will be used in apm_ops.init and EEPROM access
4050          * we should init now
4051          */
4052         spin_lock_init(&priv->reg_lock);
4053         spin_lock_init(&priv->lock);
4054
4055         /*
4056          * stop and reset the on-board processor just in case it is in a
4057          * strange state ... like being left stranded by a primary kernel
4058          * and this is now the kdump kernel trying to start up
4059          */
4060         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4061
4062         /***********************
4063          * 4. Read EEPROM
4064          * ********************/
4065
4066         /* Read the EEPROM */
4067         err = iwl_eeprom_init(priv);
4068         if (err) {
4069                 IWL_ERR(priv, "Unable to init EEPROM\n");
4070                 goto out_iounmap;
4071         }
4072         /* MAC Address location in EEPROM same for 3945/4965 */
4073         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4074         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
4075         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
4076
4077         /***********************
4078          * 5. Setup HW Constants
4079          * ********************/
4080         /* Device-specific setup */
4081         if (iwl3945_hw_set_hw_params(priv)) {
4082                 IWL_ERR(priv, "failed to set hw settings\n");
4083                 goto out_eeprom_free;
4084         }
4085
4086         /***********************
4087          * 6. Setup priv
4088          * ********************/
4089
4090         err = iwl3945_init_drv(priv);
4091         if (err) {
4092                 IWL_ERR(priv, "initializing driver failed\n");
4093                 goto out_unset_hw_params;
4094         }
4095
4096         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4097                 priv->cfg->name);
4098
4099         /***********************
4100          * 7. Setup Services
4101          * ********************/
4102
4103         spin_lock_irqsave(&priv->lock, flags);
4104         iwl_disable_interrupts(priv);
4105         spin_unlock_irqrestore(&priv->lock, flags);
4106
4107         pci_enable_msi(priv->pci_dev);
4108
4109         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4110                           IRQF_SHARED, DRV_NAME, priv);
4111         if (err) {
4112                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4113                 goto out_disable_msi;
4114         }
4115
4116         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4117         if (err) {
4118                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4119                 goto out_release_irq;
4120         }
4121
4122         iwl_set_rxon_channel(priv,
4123                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4124         iwl3945_setup_deferred_work(priv);
4125         iwl3945_setup_rx_handlers(priv);
4126         iwl_power_initialize(priv);
4127
4128         /*********************************
4129          * 8. Setup and Register mac80211
4130          * *******************************/
4131
4132         iwl_enable_interrupts(priv);
4133
4134         err = iwl3945_setup_mac(priv);
4135         if (err)
4136                 goto  out_remove_sysfs;
4137
4138         err = iwl_dbgfs_register(priv, DRV_NAME);
4139         if (err)
4140                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4141
4142         /* Start monitoring the killswitch */
4143         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4144                            2 * HZ);
4145
4146         return 0;
4147
4148  out_remove_sysfs:
4149         destroy_workqueue(priv->workqueue);
4150         priv->workqueue = NULL;
4151         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4152  out_release_irq:
4153         free_irq(priv->pci_dev->irq, priv);
4154  out_disable_msi:
4155         pci_disable_msi(priv->pci_dev);
4156         iwlcore_free_geos(priv);
4157         iwl_free_channel_map(priv);
4158  out_unset_hw_params:
4159         iwl3945_unset_hw_params(priv);
4160  out_eeprom_free:
4161         iwl_eeprom_free(priv);
4162  out_iounmap:
4163         pci_iounmap(pdev, priv->hw_base);
4164  out_pci_release_regions:
4165         pci_release_regions(pdev);
4166  out_pci_disable_device:
4167         pci_set_drvdata(pdev, NULL);
4168         pci_disable_device(pdev);
4169  out_ieee80211_free_hw:
4170         iwl_free_traffic_mem(priv);
4171         ieee80211_free_hw(priv->hw);
4172  out:
4173         return err;
4174 }
4175
4176 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4177 {
4178         struct iwl_priv *priv = pci_get_drvdata(pdev);
4179         unsigned long flags;
4180
4181         if (!priv)
4182                 return;
4183
4184         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4185
4186         iwl_dbgfs_unregister(priv);
4187
4188         set_bit(STATUS_EXIT_PENDING, &priv->status);
4189
4190         if (priv->mac80211_registered) {
4191                 ieee80211_unregister_hw(priv->hw);
4192                 priv->mac80211_registered = 0;
4193         } else {
4194                 iwl3945_down(priv);
4195         }
4196
4197         /*
4198          * Make sure device is reset to low power before unloading driver.
4199          * This may be redundant with iwl_down(), but there are paths to
4200          * run iwl_down() without calling apm_ops.stop(), and there are
4201          * paths to avoid running iwl_down() at all before leaving driver.
4202          * This (inexpensive) call *makes sure* device is reset.
4203          */
4204         priv->cfg->ops->lib->apm_ops.stop(priv);
4205
4206         /* make sure we flush any pending irq or
4207          * tasklet for the driver
4208          */
4209         spin_lock_irqsave(&priv->lock, flags);
4210         iwl_disable_interrupts(priv);
4211         spin_unlock_irqrestore(&priv->lock, flags);
4212
4213         iwl_synchronize_irq(priv);
4214
4215         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4216
4217         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4218
4219         iwl3945_dealloc_ucode_pci(priv);
4220
4221         if (priv->rxq.bd)
4222                 iwl3945_rx_queue_free(priv, &priv->rxq);
4223         iwl3945_hw_txq_ctx_free(priv);
4224
4225         iwl3945_unset_hw_params(priv);
4226
4227         /*netif_stop_queue(dev); */
4228         flush_workqueue(priv->workqueue);
4229
4230         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4231          * priv->workqueue... so we can't take down the workqueue
4232          * until now... */
4233         destroy_workqueue(priv->workqueue);
4234         priv->workqueue = NULL;
4235         iwl_free_traffic_mem(priv);
4236
4237         free_irq(pdev->irq, priv);
4238         pci_disable_msi(pdev);
4239
4240         pci_iounmap(pdev, priv->hw_base);
4241         pci_release_regions(pdev);
4242         pci_disable_device(pdev);
4243         pci_set_drvdata(pdev, NULL);
4244
4245         iwl_free_channel_map(priv);
4246         iwlcore_free_geos(priv);
4247         kfree(priv->scan_cmd);
4248         if (priv->ibss_beacon)
4249                 dev_kfree_skb(priv->ibss_beacon);
4250
4251         ieee80211_free_hw(priv->hw);
4252 }
4253
4254
4255 /*****************************************************************************
4256  *
4257  * driver and module entry point
4258  *
4259  *****************************************************************************/
4260
4261 static struct pci_driver iwl3945_driver = {
4262         .name = DRV_NAME,
4263         .id_table = iwl3945_hw_card_ids,
4264         .probe = iwl3945_pci_probe,
4265         .remove = __devexit_p(iwl3945_pci_remove),
4266 #ifdef CONFIG_PM
4267         .suspend = iwl_pci_suspend,
4268         .resume = iwl_pci_resume,
4269 #endif
4270 };
4271
4272 static int __init iwl3945_init(void)
4273 {
4274
4275         int ret;
4276         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
4277         pr_info(DRV_COPYRIGHT "\n");
4278
4279         ret = iwl3945_rate_control_register();
4280         if (ret) {
4281                 pr_err("Unable to register rate control algorithm: %d\n", ret);
4282                 return ret;
4283         }
4284
4285         ret = pci_register_driver(&iwl3945_driver);
4286         if (ret) {
4287                 pr_err("Unable to initialize PCI module\n");
4288                 goto error_register;
4289         }
4290
4291         return ret;
4292
4293 error_register:
4294         iwl3945_rate_control_unregister();
4295         return ret;
4296 }
4297
4298 static void __exit iwl3945_exit(void)
4299 {
4300         pci_unregister_driver(&iwl3945_driver);
4301         iwl3945_rate_control_unregister();
4302 }
4303
4304 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4305
4306 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4307 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4308 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4309 MODULE_PARM_DESC(swcrypto,
4310                  "using software crypto (default 1 [software])\n");
4311 #ifdef CONFIG_IWLWIFI_DEBUG
4312 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4313 MODULE_PARM_DESC(debug, "debug output mask");
4314 #endif
4315 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4316                    int, S_IRUGO);
4317 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4318 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4319 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4320
4321 module_exit(iwl3945_exit);
4322 module_init(iwl3945_init);