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