Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlegacy/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/pci.h>
  36 #include <linux/pci-aspm.h>
  37 #include <linux/slab.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/sched.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/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_IWLEGACY_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) 2003-2011 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 il_mod_params il3945_mod_params = {
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         .disable_hw_scan = 1,
  96         /* the rest are 0 by default */
  97 };
  98
  99 /**
 100  * il3945_get_antenna_flags - Get antenna flags for RXON command
 101  * @il: eeprom and antenna fields are used to determine antenna flags
 102  *
 103  * il->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 104  * il3945_mod_params.antenna specifies the antenna diversity mode:
 105  *
 106  * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 107  * IL_ANTENNA_MAIN      - Force MAIN antenna
 108  * IL_ANTENNA_AUX       - Force AUX antenna
 109  */
 110 __le32 il3945_get_antenna_flags(const struct il_priv *il)
 111 {
 112         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
 113
 114         switch (il3945_mod_params.antenna) {
 115         case IL_ANTENNA_DIVERSITY:
 116                 return 0;
 117
 118         case IL_ANTENNA_MAIN:
 119                 if (eeprom->antenna_switch_type)
 120                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 121                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122
 123         case IL_ANTENNA_AUX:
 124                 if (eeprom->antenna_switch_type)
 125                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 126                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 127         }
 128
 129         /* bad antenna selector value */
 130         IL_ERR("Bad antenna selector value (0x%x)\n",
 131                 il3945_mod_params.antenna);
 132
 133         return 0;               /* "diversity" is default if error */
 134 }
 135
 136 static int il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
 137                                    struct ieee80211_key_conf *keyconf,
 138                                    u8 sta_id)
 139 {
 140         unsigned long flags;
 141         __le16 key_flags = 0;
 142         int ret;
 143
 144         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 145         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 146
 147         if (sta_id == il->ctx.bcast_sta_id)
 148                 key_flags |= STA_KEY_MULTICAST_MSK;
 149
 150         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 151         keyconf->hw_key_idx = keyconf->keyidx;
 152         key_flags &= ~STA_KEY_FLG_INVALID;
 153
 154         spin_lock_irqsave(&il->sta_lock, flags);
 155         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 156         il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 157         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         memcpy(il->stations[sta_id].sta.key.key, keyconf->key,
 161                keyconf->keylen);
 162
 163         if ((il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 164                         == STA_KEY_FLG_NO_ENC)
 165                 il->stations[sta_id].sta.key.key_offset =
 166                                  il_get_free_ucode_key_index(il);
 167         /* else, we are overriding an existing key => no need to allocated room
 168         * in uCode. */
 169
 170         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 171                 "no space for a new key");
 172
 173         il->stations[sta_id].sta.key.key_flags = key_flags;
 174         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 175         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 176
 177         D_INFO("hwcrypto: modify ucode station key info\n");
 178
 179         ret = il_send_add_sta(il,
 180                                 &il->stations[sta_id].sta, CMD_ASYNC);
 181
 182         spin_unlock_irqrestore(&il->sta_lock, flags);
 183
 184         return ret;
 185 }
 186
 187 static int il3945_set_tkip_dynamic_key_info(struct il_priv *il,
 188                                   struct ieee80211_key_conf *keyconf,
 189                                   u8 sta_id)
 190 {
 191         return -EOPNOTSUPP;
 192 }
 193
 194 static int il3945_set_wep_dynamic_key_info(struct il_priv *il,
 195                                   struct ieee80211_key_conf *keyconf,
 196                                   u8 sta_id)
 197 {
 198         return -EOPNOTSUPP;
 199 }
 200
 201 static int il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
 202 {
 203         unsigned long flags;
 204         struct il_addsta_cmd sta_cmd;
 205
 206         spin_lock_irqsave(&il->sta_lock, flags);
 207         memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
 208         memset(&il->stations[sta_id].sta.key, 0,
 209                 sizeof(struct il4965_keyinfo));
 210         il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 211         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 212         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 213         memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd));
 214         spin_unlock_irqrestore(&il->sta_lock, flags);
 215
 216         D_INFO("hwcrypto: clear ucode station key info\n");
 217         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
 218 }
 219
 220 static int il3945_set_dynamic_key(struct il_priv *il,
 221                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 222 {
 223         int ret = 0;
 224
 225         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 226
 227         switch (keyconf->cipher) {
 228         case WLAN_CIPHER_SUITE_CCMP:
 229                 ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
 230                 break;
 231         case WLAN_CIPHER_SUITE_TKIP:
 232                 ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
 233                 break;
 234         case WLAN_CIPHER_SUITE_WEP40:
 235         case WLAN_CIPHER_SUITE_WEP104:
 236                 ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
 237                 break;
 238         default:
 239                 IL_ERR("Unknown alg: %s alg=%x\n", __func__,
 240                         keyconf->cipher);
 241                 ret = -EINVAL;
 242         }
 243
 244         D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 245                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 246                       sta_id, ret);
 247
 248         return ret;
 249 }
 250
 251 static int il3945_remove_static_key(struct il_priv *il)
 252 {
 253         int ret = -EOPNOTSUPP;
 254
 255         return ret;
 256 }
 257
 258 static int il3945_set_static_key(struct il_priv *il,
 259                                 struct ieee80211_key_conf *key)
 260 {
 261         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 262             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 263                 return -EOPNOTSUPP;
 264
 265         IL_ERR("Static key invalid: cipher %x\n", key->cipher);
 266         return -EINVAL;
 267 }
 268
 269 static void il3945_clear_free_frames(struct il_priv *il)
 270 {
 271         struct list_head *element;
 272
 273         D_INFO("%d frames on pre-allocated heap on clear.\n",
 274                        il->frames_count);
 275
 276         while (!list_empty(&il->free_frames)) {
 277                 element = il->free_frames.next;
 278                 list_del(element);
 279                 kfree(list_entry(element, struct il3945_frame, list));
 280                 il->frames_count--;
 281         }
 282
 283         if (il->frames_count) {
 284                 IL_WARN("%d frames still in use.  Did we lose one?\n",
 285                             il->frames_count);
 286                 il->frames_count = 0;
 287         }
 288 }
 289
 290 static struct il3945_frame *il3945_get_free_frame(struct il_priv *il)
 291 {
 292         struct il3945_frame *frame;
 293         struct list_head *element;
 294         if (list_empty(&il->free_frames)) {
 295                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 296                 if (!frame) {
 297                         IL_ERR("Could not allocate frame!\n");
 298                         return NULL;
 299                 }
 300
 301                 il->frames_count++;
 302                 return frame;
 303         }
 304
 305         element = il->free_frames.next;
 306         list_del(element);
 307         return list_entry(element, struct il3945_frame, list);
 308 }
 309
 310 static void il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 311 {
 312         memset(frame, 0, sizeof(*frame));
 313         list_add(&frame->list, &il->free_frames);
 314 }
 315
 316 unsigned int il3945_fill_beacon_frame(struct il_priv *il,
 317                                 struct ieee80211_hdr *hdr,
 318                                 int left)
 319 {
 320
 321         if (!il_is_associated(il) || !il->beacon_skb)
 322                 return 0;
 323
 324         if (il->beacon_skb->len > left)
 325                 return 0;
 326
 327         memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 328
 329         return il->beacon_skb->len;
 330 }
 331
 332 static int il3945_send_beacon_cmd(struct il_priv *il)
 333 {
 334         struct il3945_frame *frame;
 335         unsigned int frame_size;
 336         int rc;
 337         u8 rate;
 338
 339         frame = il3945_get_free_frame(il);
 340
 341         if (!frame) {
 342                 IL_ERR("Could not obtain free frame buffer for beacon "
 343                           "command.\n");
 344                 return -ENOMEM;
 345         }
 346
 347         rate = il_get_lowest_plcp(il,
 348                                 &il->ctx);
 349
 350         frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 351
 352         rc = il_send_cmd_pdu(il, REPLY_TX_BEACON, frame_size,
 353                               &frame->u.cmd[0]);
 354
 355         il3945_free_frame(il, frame);
 356
 357         return rc;
 358 }
 359
 360 static void il3945_unset_hw_params(struct il_priv *il)
 361 {
 362         if (il->_3945.shared_virt)
 363                 dma_free_coherent(&il->pci_dev->dev,
 364                                   sizeof(struct il3945_shared),
 365                                   il->_3945.shared_virt,
 366                                   il->_3945.shared_phys);
 367 }
 368
 369 static void il3945_build_tx_cmd_hwcrypto(struct il_priv *il,
 370                                       struct ieee80211_tx_info *info,
 371                                       struct il_device_cmd *cmd,
 372                                       struct sk_buff *skb_frag,
 373                                       int sta_id)
 374 {
 375         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 376         struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 377
 378         tx_cmd->sec_ctl = 0;
 379
 380         switch (keyinfo->cipher) {
 381         case WLAN_CIPHER_SUITE_CCMP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 383                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 384                 D_TX("tx_cmd with AES hwcrypto\n");
 385                 break;
 386
 387         case WLAN_CIPHER_SUITE_TKIP:
 388                 break;
 389
 390         case WLAN_CIPHER_SUITE_WEP104:
 391                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 392                 /* fall through */
 393         case WLAN_CIPHER_SUITE_WEP40:
 394                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 395                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 396
 397                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 398
 399                 D_TX("Configuring packet for WEP encryption "
 400                              "with key %d\n", info->control.hw_key->hw_key_idx);
 401                 break;
 402
 403         default:
 404                 IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
 405                 break;
 406         }
 407 }
 408
 409 /*
 410  * handle build REPLY_TX command notification.
 411  */
 412 static void il3945_build_tx_cmd_basic(struct il_priv *il,
 413                                   struct il_device_cmd *cmd,
 414                                   struct ieee80211_tx_info *info,
 415                                   struct ieee80211_hdr *hdr, u8 std_id)
 416 {
 417         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 418         __le32 tx_flags = tx_cmd->tx_flags;
 419         __le16 fc = hdr->frame_control;
 420
 421         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 422         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 423                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 424                 if (ieee80211_is_mgmt(fc))
 425                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426                 if (ieee80211_is_probe_resp(fc) &&
 427                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 428                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 429         } else {
 430                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 431                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 432         }
 433
 434         tx_cmd->sta_id = std_id;
 435         if (ieee80211_has_morefrags(fc))
 436                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 437
 438         if (ieee80211_is_data_qos(fc)) {
 439                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 440                 tx_cmd->tid_tspec = qc[0] & 0xf;
 441                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 442         } else {
 443                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 444         }
 445
 446         il_tx_cmd_protection(il, info, fc, &tx_flags);
 447
 448         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 449         if (ieee80211_is_mgmt(fc)) {
 450                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 451                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 452                 else
 453                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 454         } else {
 455                 tx_cmd->timeout.pm_frame_timeout = 0;
 456         }
 457
 458         tx_cmd->driver_txop = 0;
 459         tx_cmd->tx_flags = tx_flags;
 460         tx_cmd->next_frame_len = 0;
 461 }
 462
 463 /*
 464  * start REPLY_TX command process
 465  */
 466 static int il3945_tx_skb(struct il_priv *il, struct sk_buff *skb)
 467 {
 468         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 469         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 470         struct il3945_tx_cmd *tx_cmd;
 471         struct il_tx_queue *txq = NULL;
 472         struct il_queue *q = NULL;
 473         struct il_device_cmd *out_cmd;
 474         struct il_cmd_meta *out_meta;
 475         dma_addr_t phys_addr;
 476         dma_addr_t txcmd_phys;
 477         int txq_id = skb_get_queue_mapping(skb);
 478         u16 len, idx, hdr_len;
 479         u8 id;
 480         u8 unicast;
 481         u8 sta_id;
 482         u8 tid = 0;
 483         __le16 fc;
 484         u8 wait_write_ptr = 0;
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&il->lock, flags);
 488         if (il_is_rfkill(il)) {
 489                 D_DROP("Dropping - RF KILL\n");
 490                 goto drop_unlock;
 491         }
 492
 493         if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) == IL_INVALID_RATE) {
 494                 IL_ERR("ERROR: No TX rate available.\n");
 495                 goto drop_unlock;
 496         }
 497
 498         unicast = !is_multicast_ether_addr(hdr->addr1);
 499         id = 0;
 500
 501         fc = hdr->frame_control;
 502
 503 #ifdef CONFIG_IWLEGACY_DEBUG
 504         if (ieee80211_is_auth(fc))
 505                 D_TX("Sending AUTH frame\n");
 506         else if (ieee80211_is_assoc_req(fc))
 507                 D_TX("Sending ASSOC frame\n");
 508         else if (ieee80211_is_reassoc_req(fc))
 509                 D_TX("Sending REASSOC frame\n");
 510 #endif
 511
 512         spin_unlock_irqrestore(&il->lock, flags);
 513
 514         hdr_len = ieee80211_hdrlen(fc);
 515
 516         /* Find index into station table for destination station */
 517         sta_id = il_sta_id_or_broadcast(
 518                         il, &il->ctx,
 519                         info->control.sta);
 520         if (sta_id == IL_INVALID_STATION) {
 521                 D_DROP("Dropping - INVALID STATION: %pM\n",
 522                                hdr->addr1);
 523                 goto drop;
 524         }
 525
 526         D_RATE("station Id %d\n", sta_id);
 527
 528         if (ieee80211_is_data_qos(fc)) {
 529                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 530                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 531                 if (unlikely(tid >= MAX_TID_COUNT))
 532                         goto drop;
 533         }
 534
 535         /* Descriptor for chosen Tx queue */
 536         txq = &il->txq[txq_id];
 537         q = &txq->q;
 538
 539         if ((il_queue_space(q) < q->high_mark))
 540                 goto drop;
 541
 542         spin_lock_irqsave(&il->lock, flags);
 543
 544         idx = il_get_cmd_index(q, q->write_ptr, 0);
 545
 546         /* Set up driver data for this TFD */
 547         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct il_tx_info));
 548         txq->txb[q->write_ptr].skb = skb;
 549         txq->txb[q->write_ptr].ctx = &il->ctx;
 550
 551         /* Init first empty entry in queue's array of Tx/cmd buffers */
 552         out_cmd = txq->cmd[idx];
 553         out_meta = &txq->meta[idx];
 554         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 555         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 556         memset(tx_cmd, 0, sizeof(*tx_cmd));
 557
 558         /*
 559          * Set up the Tx-command (not MAC!) header.
 560          * Store the chosen Tx queue and TFD index within the sequence field;
 561          * after Tx, uCode's Tx response will return this value so driver can
 562          * locate the frame within the tx queue and do post-tx processing.
 563          */
 564         out_cmd->hdr.cmd = REPLY_TX;
 565         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 566                                 INDEX_TO_SEQ(q->write_ptr)));
 567
 568         /* Copy MAC header from skb into command buffer */
 569         memcpy(tx_cmd->hdr, hdr, hdr_len);
 570
 571
 572         if (info->control.hw_key)
 573                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 574
 575         /* TODO need this for burst mode later on */
 576         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 577
 578         /* set is_hcca to 0; it probably will never be implemented */
 579         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id, 0);
 580
 581         /* Total # bytes to be transmitted */
 582         len = (u16)skb->len;
 583         tx_cmd->len = cpu_to_le16(len);
 584
 585         il_dbg_log_tx_data_frame(il, len, hdr);
 586         il_update_stats(il, true, fc, len);
 587         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 589
 590         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 591                 txq->need_update = 1;
 592         } else {
 593                 wait_write_ptr = 1;
 594                 txq->need_update = 0;
 595         }
 596
 597         D_TX("sequence nr = 0X%x\n",
 598                      le16_to_cpu(out_cmd->hdr.sequence));
 599         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 600         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 601         il_print_hex_dump(il, IL_DL_TX, (u8 *)tx_cmd->hdr,
 602                            ieee80211_hdrlen(fc));
 603
 604         /*
 605          * Use the first empty entry in this queue's command buffer array
 606          * to contain the Tx command and MAC header concatenated together
 607          * (payload data will be in another buffer).
 608          * Size of this varies, due to varying MAC header length.
 609          * If end is not dword aligned, we'll have 2 extra bytes at the end
 610          * of the MAC header (device reads on dword boundaries).
 611          * We'll tell device about this padding later.
 612          */
 613         len = sizeof(struct il3945_tx_cmd) +
 614                         sizeof(struct il_cmd_header) + hdr_len;
 615         len = (len + 3) & ~3;
 616
 617         /* Physical address of this Tx command's header (not MAC header!),
 618          * within command buffer array. */
 619         txcmd_phys = pci_map_single(il->pci_dev, &out_cmd->hdr,
 620                                     len, PCI_DMA_TODEVICE);
 621         /* we do not map meta data ... so we can safely access address to
 622          * provide to unmap command*/
 623         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 624         dma_unmap_len_set(out_meta, len, len);
 625
 626         /* Add buffer containing Tx command and MAC(!) header to TFD's
 627          * first entry */
 628         il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
 629                                                    txcmd_phys, len, 1, 0);
 630
 631
 632         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 633          * if any (802.11 null frames have no payload). */
 634         len = skb->len - hdr_len;
 635         if (len) {
 636                 phys_addr = pci_map_single(il->pci_dev, skb->data + hdr_len,
 637                                            len, PCI_DMA_TODEVICE);
 638                 il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
 639                                                            phys_addr, len,
 640                                                            0, U32_PAD(len));
 641         }
 642
 643
 644         /* Tell device the write index *just past* this latest filled TFD */
 645         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 646         il_txq_update_write_ptr(il, txq);
 647         spin_unlock_irqrestore(&il->lock, flags);
 648
 649         if (il_queue_space(q) < q->high_mark
 650             && il->mac80211_registered) {
 651                 if (wait_write_ptr) {
 652                         spin_lock_irqsave(&il->lock, flags);
 653                         txq->need_update = 1;
 654                         il_txq_update_write_ptr(il, txq);
 655                         spin_unlock_irqrestore(&il->lock, flags);
 656                 }
 657
 658                 il_stop_queue(il, txq);
 659         }
 660
 661         return 0;
 662
 663 drop_unlock:
 664         spin_unlock_irqrestore(&il->lock, flags);
 665 drop:
 666         return -1;
 667 }
 668
 669 static int il3945_get_measurement(struct il_priv *il,
 670                                struct ieee80211_measurement_params *params,
 671                                u8 type)
 672 {
 673         struct il_spectrum_cmd spectrum;
 674         struct il_rx_pkt *pkt;
 675         struct il_host_cmd cmd = {
 676                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 677                 .data = (void *)&spectrum,
 678                 .flags = CMD_WANT_SKB,
 679         };
 680         u32 add_time = le64_to_cpu(params->start_time);
 681         int rc;
 682         int spectrum_resp_status;
 683         int duration = le16_to_cpu(params->duration);
 684         struct il_rxon_context *ctx = &il->ctx;
 685
 686         if (il_is_associated(il))
 687                 add_time = il_usecs_to_beacons(il,
 688                         le64_to_cpu(params->start_time) - il->_3945.last_tsf,
 689                         le16_to_cpu(ctx->timing.beacon_interval));
 690
 691         memset(&spectrum, 0, sizeof(spectrum));
 692
 693         spectrum.channel_count = cpu_to_le16(1);
 694         spectrum.flags =
 695             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 696         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 697         cmd.len = sizeof(spectrum);
 698         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 699
 700         if (il_is_associated(il))
 701                 spectrum.start_time =
 702                         il_add_beacon_time(il,
 703                                 il->_3945.last_beacon_time, add_time,
 704                                 le16_to_cpu(ctx->timing.beacon_interval));
 705         else
 706                 spectrum.start_time = 0;
 707
 708         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 709         spectrum.channels[0].channel = params->channel;
 710         spectrum.channels[0].type = type;
 711         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 712                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 713                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 714
 715         rc = il_send_cmd_sync(il, &cmd);
 716         if (rc)
 717                 return rc;
 718
 719         pkt = (struct il_rx_pkt *)cmd.reply_page;
 720         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 721                 IL_ERR("Bad return from REPLY_RX_ON_ASSOC command\n");
 722                 rc = -EIO;
 723         }
 724
 725         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 726         switch (spectrum_resp_status) {
 727         case 0:         /* Command will be handled */
 728                 if (pkt->u.spectrum.id != 0xff) {
 729                         D_INFO("Replaced existing measurement: %d\n",
 730                                                 pkt->u.spectrum.id);
 731                         il->measurement_status &= ~MEASUREMENT_READY;
 732                 }
 733                 il->measurement_status |= MEASUREMENT_ACTIVE;
 734                 rc = 0;
 735                 break;
 736
 737         case 1:         /* Command will not be handled */
 738                 rc = -EAGAIN;
 739                 break;
 740         }
 741
 742         il_free_pages(il, cmd.reply_page);
 743
 744         return rc;
 745 }
 746
 747 static void il3945_rx_reply_alive(struct il_priv *il,
 748                                struct il_rx_mem_buffer *rxb)
 749 {
 750         struct il_rx_pkt *pkt = rxb_addr(rxb);
 751         struct il_alive_resp *palive;
 752         struct delayed_work *pwork;
 753
 754         palive = &pkt->u.alive_frame;
 755
 756         D_INFO("Alive ucode status 0x%08X revision "
 757                        "0x%01X 0x%01X\n",
 758                        palive->is_valid, palive->ver_type,
 759                        palive->ver_subtype);
 760
 761         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 762                 D_INFO("Initialization Alive received.\n");
 763                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 764                        sizeof(struct il_alive_resp));
 765                 pwork = &il->init_alive_start;
 766         } else {
 767                 D_INFO("Runtime Alive received.\n");
 768                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 769                        sizeof(struct il_alive_resp));
 770                 pwork = &il->alive_start;
 771                 il3945_disable_events(il);
 772         }
 773
 774         /* We delay the ALIVE response by 5ms to
 775          * give the HW RF Kill time to activate... */
 776         if (palive->is_valid == UCODE_VALID_OK)
 777                 queue_delayed_work(il->workqueue, pwork,
 778                                    msecs_to_jiffies(5));
 779         else
 780                 IL_WARN("uCode did not respond OK.\n");
 781 }
 782
 783 static void il3945_rx_reply_add_sta(struct il_priv *il,
 784                                  struct il_rx_mem_buffer *rxb)
 785 {
 786 #ifdef CONFIG_IWLEGACY_DEBUG
 787         struct il_rx_pkt *pkt = rxb_addr(rxb);
 788 #endif
 789
 790         D_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 791 }
 792
 793 static void il3945_rx_beacon_notif(struct il_priv *il,
 794                                 struct il_rx_mem_buffer *rxb)
 795 {
 796         struct il_rx_pkt *pkt = rxb_addr(rxb);
 797         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 798 #ifdef CONFIG_IWLEGACY_DEBUG
 799         u8 rate = beacon->beacon_notify_hdr.rate;
 800
 801         D_RX("beacon status %x retries %d iss %d "
 802                 "tsf %d %d rate %d\n",
 803                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 804                 beacon->beacon_notify_hdr.failure_frame,
 805                 le32_to_cpu(beacon->ibss_mgr_status),
 806                 le32_to_cpu(beacon->high_tsf),
 807                 le32_to_cpu(beacon->low_tsf), rate);
 808 #endif
 809
 810         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 811
 812 }
 813
 814 /* Handle notification from uCode that card's power state is changing
 815  * due to software, hardware, or critical temperature RFKILL */
 816 static void il3945_rx_card_state_notif(struct il_priv *il,
 817                                     struct il_rx_mem_buffer *rxb)
 818 {
 819         struct il_rx_pkt *pkt = rxb_addr(rxb);
 820         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 821         unsigned long status = il->status;
 822
 823         IL_WARN("Card state received: HW:%s SW:%s\n",
 824                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 825                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 826
 827         _il_wr(il, CSR_UCODE_DRV_GP1_SET,
 828                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 829
 830         if (flags & HW_CARD_DISABLED)
 831                 set_bit(STATUS_RF_KILL_HW, &il->status);
 832         else
 833                 clear_bit(STATUS_RF_KILL_HW, &il->status);
 834
 835
 836         il_scan_cancel(il);
 837
 838         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 839              test_bit(STATUS_RF_KILL_HW, &il->status)))
 840                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 841                                 test_bit(STATUS_RF_KILL_HW, &il->status));
 842         else
 843                 wake_up(&il->wait_command_queue);
 844 }
 845
 846 /**
 847  * il3945_setup_rx_handlers - Initialize Rx handler callbacks
 848  *
 849  * Setup the RX handlers for each of the reply types sent from the uCode
 850  * to the host.
 851  *
 852  * This function chains into the hardware specific files for them to setup
 853  * any hardware specific handlers as well.
 854  */
 855 static void il3945_setup_rx_handlers(struct il_priv *il)
 856 {
 857         il->rx_handlers[REPLY_ALIVE] = il3945_rx_reply_alive;
 858         il->rx_handlers[REPLY_ADD_STA] = il3945_rx_reply_add_sta;
 859         il->rx_handlers[REPLY_ERROR] = il_rx_reply_error;
 860         il->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = il_rx_csa;
 861         il->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 862                         il_rx_spectrum_measure_notif;
 863         il->rx_handlers[PM_SLEEP_NOTIFICATION] = il_rx_pm_sleep_notif;
 864         il->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 865             il_rx_pm_debug_statistics_notif;
 866         il->rx_handlers[BEACON_NOTIFICATION] = il3945_rx_beacon_notif;
 867
 868         /*
 869          * The same handler is used for both the REPLY to a discrete
 870          * statistics request from the host as well as for the periodic
 871          * statistics notifications (after received beacons) from the uCode.
 872          */
 873         il->rx_handlers[REPLY_STATISTICS_CMD] = il3945_reply_statistics;
 874         il->rx_handlers[STATISTICS_NOTIFICATION] = il3945_hw_rx_statistics;
 875
 876         il_setup_rx_scan_handlers(il);
 877         il->rx_handlers[CARD_STATE_NOTIFICATION] = il3945_rx_card_state_notif;
 878
 879         /* Set up hardware specific Rx handlers */
 880         il3945_hw_rx_handler_setup(il);
 881 }
 882
 883 /************************** RX-FUNCTIONS ****************************/
 884 /*
 885  * Rx theory of operation
 886  *
 887  * The host allocates 32 DMA target addresses and passes the host address
 888  * to the firmware at register IL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 889  * 0 to 31
 890  *
 891  * Rx Queue Indexes
 892  * The host/firmware share two index registers for managing the Rx buffers.
 893  *
 894  * The READ index maps to the first position that the firmware may be writing
 895  * to -- the driver can read up to (but not including) this position and get
 896  * good data.
 897  * The READ index is managed by the firmware once the card is enabled.
 898  *
 899  * The WRITE index maps to the last position the driver has read from -- the
 900  * position preceding WRITE is the last slot the firmware can place a packet.
 901  *
 902  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 903  * WRITE = READ.
 904  *
 905  * During initialization, the host sets up the READ queue position to the first
 906  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 907  *
 908  * When the firmware places a packet in a buffer, it will advance the READ index
 909  * and fire the RX interrupt.  The driver can then query the READ index and
 910  * process as many packets as possible, moving the WRITE index forward as it
 911  * resets the Rx queue buffers with new memory.
 912  *
 913  * The management in the driver is as follows:
 914  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 915  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 916  *   to replenish the iwl->rxq->rx_free.
 917  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 918  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 919  *   'processed' and 'read' driver indexes as well)
 920  * + A received packet is processed and handed to the kernel network stack,
 921  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 922  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 923  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 924  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 925  *   were enough free buffers and RX_STALLED is set it is cleared.
 926  *
 927  *
 928  * Driver sequence:
 929  *
 930  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 931  *                            il3945_rx_queue_restock
 932  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 933  *                            queue, updates firmware pointers, and updates
 934  *                            the WRITE index.  If insufficient rx_free buffers
 935  *                            are available, schedules il3945_rx_replenish
 936  *
 937  * -- enable interrupts --
 938  * ISR - il3945_rx()         Detach il_rx_mem_buffers from pool up to the
 939  *                            READ INDEX, detaching the SKB from the pool.
 940  *                            Moves the packet buffer from queue to rx_used.
 941  *                            Calls il3945_rx_queue_restock to refill any empty
 942  *                            slots.
 943  * ...
 944  *
 945  */
 946
 947 /**
 948  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 949  */
 950 static inline __le32 il3945_dma_addr2rbd_ptr(struct il_priv *il,
 951                                           dma_addr_t dma_addr)
 952 {
 953         return cpu_to_le32((u32)dma_addr);
 954 }
 955
 956 /**
 957  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 958  *
 959  * If there are slots in the RX queue that need to be restocked,
 960  * and we have free pre-allocated buffers, fill the ranks as much
 961  * as we can, pulling from rx_free.
 962  *
 963  * This moves the 'write' index forward to catch up with 'processed', and
 964  * also updates the memory address in the firmware to reference the new
 965  * target buffer.
 966  */
 967 static void il3945_rx_queue_restock(struct il_priv *il)
 968 {
 969         struct il_rx_queue *rxq = &il->rxq;
 970         struct list_head *element;
 971         struct il_rx_mem_buffer *rxb;
 972         unsigned long flags;
 973         int write;
 974
 975         spin_lock_irqsave(&rxq->lock, flags);
 976         write = rxq->write & ~0x7;
 977         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 978                 /* Get next free Rx buffer, remove from free list */
 979                 element = rxq->rx_free.next;
 980                 rxb = list_entry(element, struct il_rx_mem_buffer, list);
 981                 list_del(element);
 982
 983                 /* Point to Rx buffer via next RBD in circular buffer */
 984                 rxq->bd[rxq->write] = il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 985                 rxq->queue[rxq->write] = rxb;
 986                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 987                 rxq->free_count--;
 988         }
 989         spin_unlock_irqrestore(&rxq->lock, flags);
 990         /* If the pre-allocated buffer pool is dropping low, schedule to
 991          * refill it */
 992         if (rxq->free_count <= RX_LOW_WATERMARK)
 993                 queue_work(il->workqueue, &il->rx_replenish);
 994
 995
 996         /* If we've added more space for the firmware to place data, tell it.
 997          * Increment device's write pointer in multiples of 8. */
 998         if (rxq->write_actual != (rxq->write & ~0x7) ||
 999             abs(rxq->write - rxq->read) > 7) {
1000                 spin_lock_irqsave(&rxq->lock, flags);
1001                 rxq->need_update = 1;
1002                 spin_unlock_irqrestore(&rxq->lock, flags);
1003                 il_rx_queue_update_write_ptr(il, rxq);
1004         }
1005 }
1006
1007 /**
1008  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
1009  *
1010  * When moving to rx_free an SKB is allocated for the slot.
1011  *
1012  * Also restock the Rx queue via il3945_rx_queue_restock.
1013  * This is called as a scheduled work item (except for during initialization)
1014  */
1015 static void il3945_rx_allocate(struct il_priv *il, gfp_t priority)
1016 {
1017         struct il_rx_queue *rxq = &il->rxq;
1018         struct list_head *element;
1019         struct il_rx_mem_buffer *rxb;
1020         struct page *page;
1021         unsigned long flags;
1022         gfp_t gfp_mask = priority;
1023
1024         while (1) {
1025                 spin_lock_irqsave(&rxq->lock, flags);
1026
1027                 if (list_empty(&rxq->rx_used)) {
1028                         spin_unlock_irqrestore(&rxq->lock, flags);
1029                         return;
1030                 }
1031                 spin_unlock_irqrestore(&rxq->lock, flags);
1032
1033                 if (rxq->free_count > RX_LOW_WATERMARK)
1034                         gfp_mask |= __GFP_NOWARN;
1035
1036                 if (il->hw_params.rx_page_order > 0)
1037                         gfp_mask |= __GFP_COMP;
1038
1039                 /* Alloc a new receive buffer */
1040                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1041                 if (!page) {
1042                         if (net_ratelimit())
1043                                 D_INFO("Failed to allocate SKB buffer.\n");
1044                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1045                             net_ratelimit())
1046                                 IL_ERR("Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1047                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1048                                          rxq->free_count);
1049                         /* We don't reschedule replenish work here -- we will
1050                          * call the restock method and if it still needs
1051                          * more buffers it will schedule replenish */
1052                         break;
1053                 }
1054
1055                 spin_lock_irqsave(&rxq->lock, flags);
1056                 if (list_empty(&rxq->rx_used)) {
1057                         spin_unlock_irqrestore(&rxq->lock, flags);
1058                         __free_pages(page, il->hw_params.rx_page_order);
1059                         return;
1060                 }
1061                 element = rxq->rx_used.next;
1062                 rxb = list_entry(element, struct il_rx_mem_buffer, list);
1063                 list_del(element);
1064                 spin_unlock_irqrestore(&rxq->lock, flags);
1065
1066                 rxb->page = page;
1067                 /* Get physical address of RB/SKB */
1068                 rxb->page_dma = pci_map_page(il->pci_dev, page, 0,
1069                                 PAGE_SIZE << il->hw_params.rx_page_order,
1070                                 PCI_DMA_FROMDEVICE);
1071
1072                 spin_lock_irqsave(&rxq->lock, flags);
1073
1074                 list_add_tail(&rxb->list, &rxq->rx_free);
1075                 rxq->free_count++;
1076                 il->alloc_rxb_page++;
1077
1078                 spin_unlock_irqrestore(&rxq->lock, flags);
1079         }
1080 }
1081
1082 void il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1083 {
1084         unsigned long flags;
1085         int i;
1086         spin_lock_irqsave(&rxq->lock, flags);
1087         INIT_LIST_HEAD(&rxq->rx_free);
1088         INIT_LIST_HEAD(&rxq->rx_used);
1089         /* Fill the rx_used queue with _all_ of the Rx buffers */
1090         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1091                 /* In the reset function, these buffers may have been allocated
1092                  * to an SKB, so we need to unmap and free potential storage */
1093                 if (rxq->pool[i].page != NULL) {
1094                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1095                                 PAGE_SIZE << il->hw_params.rx_page_order,
1096                                 PCI_DMA_FROMDEVICE);
1097                         __il_free_pages(il, rxq->pool[i].page);
1098                         rxq->pool[i].page = NULL;
1099                 }
1100                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1101         }
1102
1103         /* Set us so that we have processed and used all buffers, but have
1104          * not restocked the Rx queue with fresh buffers */
1105         rxq->read = rxq->write = 0;
1106         rxq->write_actual = 0;
1107         rxq->free_count = 0;
1108         spin_unlock_irqrestore(&rxq->lock, flags);
1109 }
1110
1111 void il3945_rx_replenish(void *data)
1112 {
1113         struct il_priv *il = data;
1114         unsigned long flags;
1115
1116         il3945_rx_allocate(il, GFP_KERNEL);
1117
1118         spin_lock_irqsave(&il->lock, flags);
1119         il3945_rx_queue_restock(il);
1120         spin_unlock_irqrestore(&il->lock, flags);
1121 }
1122
1123 static void il3945_rx_replenish_now(struct il_priv *il)
1124 {
1125         il3945_rx_allocate(il, GFP_ATOMIC);
1126
1127         il3945_rx_queue_restock(il);
1128 }
1129
1130
1131 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1132  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1133  * This free routine walks the list of POOL entries and if SKB is set to
1134  * non NULL it is unmapped and freed
1135  */
1136 static void il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1137 {
1138         int i;
1139         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1140                 if (rxq->pool[i].page != NULL) {
1141                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1142                                 PAGE_SIZE << il->hw_params.rx_page_order,
1143                                 PCI_DMA_FROMDEVICE);
1144                         __il_free_pages(il, rxq->pool[i].page);
1145                         rxq->pool[i].page = NULL;
1146                 }
1147         }
1148
1149         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1150                           rxq->bd_dma);
1151         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1152                           rxq->rb_stts, rxq->rb_stts_dma);
1153         rxq->bd = NULL;
1154         rxq->rb_stts  = NULL;
1155 }
1156
1157
1158 /* Convert linear signal-to-noise ratio into dB */
1159 static u8 ratio2dB[100] = {
1160 /*       0   1   2   3   4   5   6   7   8   9 */
1161          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1162         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1163         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1164         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1165         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1166         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1167         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1168         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1169         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1170         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1171 };
1172
1173 /* Calculates a relative dB value from a ratio of linear
1174  *   (i.e. not dB) signal levels.
1175  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1176 int il3945_calc_db_from_ratio(int sig_ratio)
1177 {
1178         /* 1000:1 or higher just report as 60 dB */
1179         if (sig_ratio >= 1000)
1180                 return 60;
1181
1182         /* 100:1 or higher, divide by 10 and use table,
1183          *   add 20 dB to make up for divide by 10 */
1184         if (sig_ratio >= 100)
1185                 return 20 + (int)ratio2dB[sig_ratio/10];
1186
1187         /* We shouldn't see this */
1188         if (sig_ratio < 1)
1189                 return 0;
1190
1191         /* Use table for ratios 1:1 - 99:1 */
1192         return (int)ratio2dB[sig_ratio];
1193 }
1194
1195 /**
1196  * il3945_rx_handle - Main entry function for receiving responses from uCode
1197  *
1198  * Uses the il->rx_handlers callback function array to invoke
1199  * the appropriate handlers, including command responses,
1200  * frame-received notifications, and other notifications.
1201  */
1202 static void il3945_rx_handle(struct il_priv *il)
1203 {
1204         struct il_rx_mem_buffer *rxb;
1205         struct il_rx_pkt *pkt;
1206         struct il_rx_queue *rxq = &il->rxq;
1207         u32 r, i;
1208         int reclaim;
1209         unsigned long flags;
1210         u8 fill_rx = 0;
1211         u32 count = 8;
1212         int total_empty = 0;
1213
1214         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1215          * buffer that the driver may process (last buffer filled by ucode). */
1216         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1217         i = rxq->read;
1218
1219         /* calculate total frames need to be restock after handling RX */
1220         total_empty = r - rxq->write_actual;
1221         if (total_empty < 0)
1222                 total_empty += RX_QUEUE_SIZE;
1223
1224         if (total_empty > (RX_QUEUE_SIZE / 2))
1225                 fill_rx = 1;
1226         /* Rx interrupt, but nothing sent from uCode */
1227         if (i == r)
1228                 D_RX("r = %d, i = %d\n", r, i);
1229
1230         while (i != r) {
1231                 int len;
1232
1233                 rxb = rxq->queue[i];
1234
1235                 /* If an RXB doesn't have a Rx queue slot associated with it,
1236                  * then a bug has been introduced in the queue refilling
1237                  * routines -- catch it here */
1238                 BUG_ON(rxb == NULL);
1239
1240                 rxq->queue[i] = NULL;
1241
1242                 pci_unmap_page(il->pci_dev, rxb->page_dma,
1243                                PAGE_SIZE << il->hw_params.rx_page_order,
1244                                PCI_DMA_FROMDEVICE);
1245                 pkt = rxb_addr(rxb);
1246
1247                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1248                 len += sizeof(u32); /* account for status word */
1249
1250                 /* Reclaim a command buffer only if this packet is a response
1251                  *   to a (driver-originated) command.
1252                  * If the packet (e.g. Rx frame) originated from uCode,
1253                  *   there is no command buffer to reclaim.
1254                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1255                  *   but apparently a few don't get set; catch them here. */
1256                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1257                         pkt->hdr.cmd != STATISTICS_NOTIFICATION &&
1258                         pkt->hdr.cmd != REPLY_TX;
1259
1260                 /* Based on type of command response or notification,
1261                  *   handle those that need handling via function in
1262                  *   rx_handlers table.  See il3945_setup_rx_handlers() */
1263                 if (il->rx_handlers[pkt->hdr.cmd]) {
1264                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1265                         il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1266                         il->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1267                         il->rx_handlers[pkt->hdr.cmd] (il, rxb);
1268                 } else {
1269                         /* No handling needed */
1270                         D_RX(
1271                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1272                                 r, i, il_get_cmd_string(pkt->hdr.cmd),
1273                                 pkt->hdr.cmd);
1274                 }
1275
1276                 /*
1277                  * XXX: After here, we should always check rxb->page
1278                  * against NULL before touching it or its virtual
1279                  * memory (pkt). Because some rx_handler might have
1280                  * already taken or freed the pages.
1281                  */
1282
1283                 if (reclaim) {
1284                         /* Invoke any callbacks, transfer the buffer to caller,
1285                          * and fire off the (possibly) blocking il_send_cmd()
1286                          * as we reclaim the driver command queue */
1287                         if (rxb->page)
1288                                 il_tx_cmd_complete(il, rxb);
1289                         else
1290                                 IL_WARN("Claim null rxb?\n");
1291                 }
1292
1293                 /* Reuse the page if possible. For notification packets and
1294                  * SKBs that fail to Rx correctly, add them back into the
1295                  * rx_free list for reuse later. */
1296                 spin_lock_irqsave(&rxq->lock, flags);
1297                 if (rxb->page != NULL) {
1298                         rxb->page_dma = pci_map_page(il->pci_dev, rxb->page,
1299                                 0, PAGE_SIZE << il->hw_params.rx_page_order,
1300                                 PCI_DMA_FROMDEVICE);
1301                         list_add_tail(&rxb->list, &rxq->rx_free);
1302                         rxq->free_count++;
1303                 } else
1304                         list_add_tail(&rxb->list, &rxq->rx_used);
1305
1306                 spin_unlock_irqrestore(&rxq->lock, flags);
1307
1308                 i = (i + 1) & RX_QUEUE_MASK;
1309                 /* If there are a lot of unused frames,
1310                  * restock the Rx queue so ucode won't assert. */
1311                 if (fill_rx) {
1312                         count++;
1313                         if (count >= 8) {
1314                                 rxq->read = i;
1315                                 il3945_rx_replenish_now(il);
1316                                 count = 0;
1317                         }
1318                 }
1319         }
1320
1321         /* Backtrack one entry */
1322         rxq->read = i;
1323         if (fill_rx)
1324                 il3945_rx_replenish_now(il);
1325         else
1326                 il3945_rx_queue_restock(il);
1327 }
1328
1329 /* call this function to flush any scheduled tasklet */
1330 static inline void il3945_synchronize_irq(struct il_priv *il)
1331 {
1332         /* wait to make sure we flush pending tasklet*/
1333         synchronize_irq(il->pci_dev->irq);
1334         tasklet_kill(&il->irq_tasklet);
1335 }
1336
1337 static const char *il3945_desc_lookup(int i)
1338 {
1339         switch (i) {
1340         case 1:
1341                 return "FAIL";
1342         case 2:
1343                 return "BAD_PARAM";
1344         case 3:
1345                 return "BAD_CHECKSUM";
1346         case 4:
1347                 return "NMI_INTERRUPT";
1348         case 5:
1349                 return "SYSASSERT";
1350         case 6:
1351                 return "FATAL_ERROR";
1352         }
1353
1354         return "UNKNOWN";
1355 }
1356
1357 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1358 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1359
1360 void il3945_dump_nic_error_log(struct il_priv *il)
1361 {
1362         u32 i;
1363         u32 desc, time, count, base, data1;
1364         u32 blink1, blink2, ilink1, ilink2;
1365
1366         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1367
1368         if (!il3945_hw_valid_rtc_data_addr(base)) {
1369                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1370                 return;
1371         }
1372
1373
1374         count = il_read_targ_mem(il, base);
1375
1376         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1377                 IL_ERR("Start IWL Error Log Dump:\n");
1378                 IL_ERR("Status: 0x%08lX, count: %d\n",
1379                         il->status, count);
1380         }
1381
1382         IL_ERR("Desc       Time       asrtPC  blink2 "
1383                   "ilink1  nmiPC   Line\n");
1384         for (i = ERROR_START_OFFSET;
1385              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1386              i += ERROR_ELEM_SIZE) {
1387                 desc = il_read_targ_mem(il, base + i);
1388                 time =
1389                     il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1390                 blink1 =
1391                     il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1392                 blink2 =
1393                     il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1394                 ilink1 =
1395                     il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1396                 ilink2 =
1397                     il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1398                 data1 =
1399                     il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1400
1401                 IL_ERR(
1402                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1403                         il3945_desc_lookup(desc), desc, time, blink1, blink2,
1404                         ilink1, ilink2, data1);
1405         }
1406 }
1407
1408 static void il3945_irq_tasklet(struct il_priv *il)
1409 {
1410         u32 inta, handled = 0;
1411         u32 inta_fh;
1412         unsigned long flags;
1413 #ifdef CONFIG_IWLEGACY_DEBUG
1414         u32 inta_mask;
1415 #endif
1416
1417         spin_lock_irqsave(&il->lock, flags);
1418
1419         /* Ack/clear/reset pending uCode interrupts.
1420          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1421          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1422         inta = _il_rd(il, CSR_INT);
1423         _il_wr(il, CSR_INT, inta);
1424
1425         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1426          * Any new interrupts that happen after this, either while we're
1427          * in this tasklet, or later, will show up in next ISR/tasklet. */
1428         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1429         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1430
1431 #ifdef CONFIG_IWLEGACY_DEBUG
1432         if (il_get_debug_level(il) & IL_DL_ISR) {
1433                 /* just for debug */
1434                 inta_mask = _il_rd(il, CSR_INT_MASK);
1435                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1436                               inta, inta_mask, inta_fh);
1437         }
1438 #endif
1439
1440         spin_unlock_irqrestore(&il->lock, flags);
1441
1442         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1443          * atomic, make sure that inta covers all the interrupts that
1444          * we've discovered, even if FH interrupt came in just after
1445          * reading CSR_INT. */
1446         if (inta_fh & CSR39_FH_INT_RX_MASK)
1447                 inta |= CSR_INT_BIT_FH_RX;
1448         if (inta_fh & CSR39_FH_INT_TX_MASK)
1449                 inta |= CSR_INT_BIT_FH_TX;
1450
1451         /* Now service all interrupt bits discovered above. */
1452         if (inta & CSR_INT_BIT_HW_ERR) {
1453                 IL_ERR("Hardware error detected.  Restarting.\n");
1454
1455                 /* Tell the device to stop sending interrupts */
1456                 il_disable_interrupts(il);
1457
1458                 il->isr_stats.hw++;
1459                 il_irq_handle_error(il);
1460
1461                 handled |= CSR_INT_BIT_HW_ERR;
1462
1463                 return;
1464         }
1465
1466 #ifdef CONFIG_IWLEGACY_DEBUG
1467         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1468                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1469                 if (inta & CSR_INT_BIT_SCD) {
1470                         D_ISR("Scheduler finished to transmit "
1471                                       "the frame/frames.\n");
1472                         il->isr_stats.sch++;
1473                 }
1474
1475                 /* Alive notification via Rx interrupt will do the real work */
1476                 if (inta & CSR_INT_BIT_ALIVE) {
1477                         D_ISR("Alive interrupt\n");
1478                         il->isr_stats.alive++;
1479                 }
1480         }
1481 #endif
1482         /* Safely ignore these bits for debug checks below */
1483         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1484
1485         /* Error detected by uCode */
1486         if (inta & CSR_INT_BIT_SW_ERR) {
1487                 IL_ERR("Microcode SW error detected. "
1488                         "Restarting 0x%X.\n", inta);
1489                 il->isr_stats.sw++;
1490                 il_irq_handle_error(il);
1491                 handled |= CSR_INT_BIT_SW_ERR;
1492         }
1493
1494         /* uCode wakes up after power-down sleep */
1495         if (inta & CSR_INT_BIT_WAKEUP) {
1496                 D_ISR("Wakeup interrupt\n");
1497                 il_rx_queue_update_write_ptr(il, &il->rxq);
1498                 il_txq_update_write_ptr(il, &il->txq[0]);
1499                 il_txq_update_write_ptr(il, &il->txq[1]);
1500                 il_txq_update_write_ptr(il, &il->txq[2]);
1501                 il_txq_update_write_ptr(il, &il->txq[3]);
1502                 il_txq_update_write_ptr(il, &il->txq[4]);
1503                 il_txq_update_write_ptr(il, &il->txq[5]);
1504
1505                 il->isr_stats.wakeup++;
1506                 handled |= CSR_INT_BIT_WAKEUP;
1507         }
1508
1509         /* All uCode command responses, including Tx command responses,
1510          * Rx "responses" (frame-received notification), and other
1511          * notifications from uCode come through here*/
1512         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1513                 il3945_rx_handle(il);
1514                 il->isr_stats.rx++;
1515                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1516         }
1517
1518         if (inta & CSR_INT_BIT_FH_TX) {
1519                 D_ISR("Tx interrupt\n");
1520                 il->isr_stats.tx++;
1521
1522                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1523                 il_wr(il, FH39_TCSR_CREDIT
1524                                         (FH39_SRVC_CHNL), 0x0);
1525                 handled |= CSR_INT_BIT_FH_TX;
1526         }
1527
1528         if (inta & ~handled) {
1529                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1530                 il->isr_stats.unhandled++;
1531         }
1532
1533         if (inta & ~il->inta_mask) {
1534                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1535                          inta & ~il->inta_mask);
1536                 IL_WARN("   with FH_INT = 0x%08x\n", inta_fh);
1537         }
1538
1539         /* Re-enable all interrupts */
1540         /* only Re-enable if disabled by irq */
1541         if (test_bit(STATUS_INT_ENABLED, &il->status))
1542                 il_enable_interrupts(il);
1543
1544 #ifdef CONFIG_IWLEGACY_DEBUG
1545         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1546                 inta = _il_rd(il, CSR_INT);
1547                 inta_mask = _il_rd(il, CSR_INT_MASK);
1548                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1549                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1550                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1551         }
1552 #endif
1553 }
1554
1555 static int il3945_get_channels_for_scan(struct il_priv *il,
1556                                          enum ieee80211_band band,
1557                                      u8 is_active, u8 n_probes,
1558                                      struct il3945_scan_channel *scan_ch,
1559                                      struct ieee80211_vif *vif)
1560 {
1561         struct ieee80211_channel *chan;
1562         const struct ieee80211_supported_band *sband;
1563         const struct il_channel_info *ch_info;
1564         u16 passive_dwell = 0;
1565         u16 active_dwell = 0;
1566         int added, i;
1567
1568         sband = il_get_hw_mode(il, band);
1569         if (!sband)
1570                 return 0;
1571
1572         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1573         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1574
1575         if (passive_dwell <= active_dwell)
1576                 passive_dwell = active_dwell + 1;
1577
1578         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1579                 chan = il->scan_request->channels[i];
1580
1581                 if (chan->band != band)
1582                         continue;
1583
1584                 scan_ch->channel = chan->hw_value;
1585
1586                 ch_info = il_get_channel_info(il, band,
1587                                                         scan_ch->channel);
1588                 if (!il_is_channel_valid(ch_info)) {
1589                         D_SCAN(
1590                                 "Channel %d is INVALID for this band.\n",
1591                                scan_ch->channel);
1592                         continue;
1593                 }
1594
1595                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1596                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1597                 /* If passive , set up for auto-switch
1598                  *  and use long active_dwell time.
1599                  */
1600                 if (!is_active || il_is_channel_passive(ch_info) ||
1601                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1602                         scan_ch->type = 0;      /* passive */
1603                         if (IL_UCODE_API(il->ucode_ver) == 1)
1604                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1605                 } else {
1606                         scan_ch->type = 1;      /* active */
1607                 }
1608
1609                 /* Set direct probe bits. These may be used both for active
1610                  * scan channels (probes gets sent right away),
1611                  * or for passive channels (probes get se sent only after
1612                  * hearing clear Rx packet).*/
1613                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1614                         if (n_probes)
1615                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1616                 } else {
1617                         /* uCode v1 does not allow setting direct probe bits on
1618                          * passive channel. */
1619                         if ((scan_ch->type & 1) && n_probes)
1620                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1621                 }
1622
1623                 /* Set txpower levels to defaults */
1624                 scan_ch->tpc.dsp_atten = 110;
1625                 /* scan_pwr_info->tpc.dsp_atten; */
1626
1627                 /*scan_pwr_info->tpc.tx_gain; */
1628                 if (band == IEEE80211_BAND_5GHZ)
1629                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1630                 else {
1631                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1632                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1633                          * power level:
1634                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1635                          */
1636                 }
1637
1638                 D_SCAN("Scanning %d [%s %d]\n",
1639                                scan_ch->channel,
1640                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1641                                (scan_ch->type & 1) ?
1642                                active_dwell : passive_dwell);
1643
1644                 scan_ch++;
1645                 added++;
1646         }
1647
1648         D_SCAN("total channels to scan %d\n", added);
1649         return added;
1650 }
1651
1652 static void il3945_init_hw_rates(struct il_priv *il,
1653                               struct ieee80211_rate *rates)
1654 {
1655         int i;
1656
1657         for (i = 0; i < IL_RATE_COUNT_LEGACY; i++) {
1658                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1659                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1660                 rates[i].hw_value_short = i;
1661                 rates[i].flags = 0;
1662                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1663                         /*
1664                          * If CCK != 1M then set short preamble rate flag.
1665                          */
1666                         rates[i].flags |= (il3945_rates[i].plcp == 10) ?
1667                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1668                 }
1669         }
1670 }
1671
1672 /******************************************************************************
1673  *
1674  * uCode download functions
1675  *
1676  ******************************************************************************/
1677
1678 static void il3945_dealloc_ucode_pci(struct il_priv *il)
1679 {
1680         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1681         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1682         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1683         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1684         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1685         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1686 }
1687
1688 /**
1689  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1690  *     looking at all data.
1691  */
1692 static int il3945_verify_inst_full(struct il_priv *il, __le32 *image, u32 len)
1693 {
1694         u32 val;
1695         u32 save_len = len;
1696         int rc = 0;
1697         u32 errcnt;
1698
1699         D_INFO("ucode inst image size is %u\n", len);
1700
1701         il_wr(il, HBUS_TARG_MEM_RADDR,
1702                                IL39_RTC_INST_LOWER_BOUND);
1703
1704         errcnt = 0;
1705         for (; len > 0; len -= sizeof(u32), image++) {
1706                 /* read data comes through single port, auto-incr addr */
1707                 /* NOTE: Use the debugless read so we don't flood kernel log
1708                  * if IL_DL_IO is set */
1709                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1710                 if (val != le32_to_cpu(*image)) {
1711                         IL_ERR("uCode INST section is invalid at "
1712                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1713                                   save_len - len, val, le32_to_cpu(*image));
1714                         rc = -EIO;
1715                         errcnt++;
1716                         if (errcnt >= 20)
1717                                 break;
1718                 }
1719         }
1720
1721
1722         if (!errcnt)
1723                 D_INFO(
1724                         "ucode image in INSTRUCTION memory is good\n");
1725
1726         return rc;
1727 }
1728
1729
1730 /**
1731  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1732  *   using sample data 100 bytes apart.  If these sample points are good,
1733  *   it's a pretty good bet that everything between them is good, too.
1734  */
1735 static int il3945_verify_inst_sparse(struct il_priv *il, __le32 *image, u32 len)
1736 {
1737         u32 val;
1738         int rc = 0;
1739         u32 errcnt = 0;
1740         u32 i;
1741
1742         D_INFO("ucode inst image size is %u\n", len);
1743
1744         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1745                 /* read data comes through single port, auto-incr addr */
1746                 /* NOTE: Use the debugless read so we don't flood kernel log
1747                  * if IL_DL_IO is set */
1748                 il_wr(il, HBUS_TARG_MEM_RADDR,
1749                         i + IL39_RTC_INST_LOWER_BOUND);
1750                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1751                 if (val != le32_to_cpu(*image)) {
1752 #if 0 /* Enable this if you want to see details */
1753                         IL_ERR("uCode INST section is invalid at "
1754                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1755                                   i, val, *image);
1756 #endif
1757                         rc = -EIO;
1758                         errcnt++;
1759                         if (errcnt >= 3)
1760                                 break;
1761                 }
1762         }
1763
1764         return rc;
1765 }
1766
1767
1768 /**
1769  * il3945_verify_ucode - determine which instruction image is in SRAM,
1770  *    and verify its contents
1771  */
1772 static int il3945_verify_ucode(struct il_priv *il)
1773 {
1774         __le32 *image;
1775         u32 len;
1776         int rc = 0;
1777
1778         /* Try bootstrap */
1779         image = (__le32 *)il->ucode_boot.v_addr;
1780         len = il->ucode_boot.len;
1781         rc = il3945_verify_inst_sparse(il, image, len);
1782         if (rc == 0) {
1783                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1784                 return 0;
1785         }
1786
1787         /* Try initialize */
1788         image = (__le32 *)il->ucode_init.v_addr;
1789         len = il->ucode_init.len;
1790         rc = il3945_verify_inst_sparse(il, image, len);
1791         if (rc == 0) {
1792                 D_INFO("Initialize uCode is good in inst SRAM\n");
1793                 return 0;
1794         }
1795
1796         /* Try runtime/protocol */
1797         image = (__le32 *)il->ucode_code.v_addr;
1798         len = il->ucode_code.len;
1799         rc = il3945_verify_inst_sparse(il, image, len);
1800         if (rc == 0) {
1801                 D_INFO("Runtime uCode is good in inst SRAM\n");
1802                 return 0;
1803         }
1804
1805         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1806
1807         /* Since nothing seems to match, show first several data entries in
1808          * instruction SRAM, so maybe visual inspection will give a clue.
1809          * Selection of bootstrap image (vs. other images) is arbitrary. */
1810         image = (__le32 *)il->ucode_boot.v_addr;
1811         len = il->ucode_boot.len;
1812         rc = il3945_verify_inst_full(il, image, len);
1813
1814         return rc;
1815 }
1816
1817 static void il3945_nic_start(struct il_priv *il)
1818 {
1819         /* Remove all resets to allow NIC to operate */
1820         _il_wr(il, CSR_RESET, 0);
1821 }
1822
1823 #define IL3945_UCODE_GET(item)                                          \
1824 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1825 {                                                                       \
1826         return le32_to_cpu(ucode->v1.item);                             \
1827 }
1828
1829 static u32 il3945_ucode_get_header_size(u32 api_ver)
1830 {
1831         return 24;
1832 }
1833
1834 static u8 *il3945_ucode_get_data(const struct il_ucode_header *ucode)
1835 {
1836         return (u8 *) ucode->v1.data;
1837 }
1838
1839 IL3945_UCODE_GET(inst_size);
1840 IL3945_UCODE_GET(data_size);
1841 IL3945_UCODE_GET(init_size);
1842 IL3945_UCODE_GET(init_data_size);
1843 IL3945_UCODE_GET(boot_size);
1844
1845 /**
1846  * il3945_read_ucode - Read uCode images from disk file.
1847  *
1848  * Copy into buffers for card to fetch via bus-mastering
1849  */
1850 static int il3945_read_ucode(struct il_priv *il)
1851 {
1852         const struct il_ucode_header *ucode;
1853         int ret = -EINVAL, index;
1854         const struct firmware *ucode_raw;
1855         /* firmware file name contains uCode/driver compatibility version */
1856         const char *name_pre = il->cfg->fw_name_pre;
1857         const unsigned int api_max = il->cfg->ucode_api_max;
1858         const unsigned int api_min = il->cfg->ucode_api_min;
1859         char buf[25];
1860         u8 *src;
1861         size_t len;
1862         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1863
1864         /* Ask kernel firmware_class module to get the boot firmware off disk.
1865          * request_firmware() is synchronous, file is in memory on return. */
1866         for (index = api_max; index >= api_min; index--) {
1867                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
1868                 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1869                 if (ret < 0) {
1870                         IL_ERR("%s firmware file req failed: %d\n",
1871                                   buf, ret);
1872                         if (ret == -ENOENT)
1873                                 continue;
1874                         else
1875                                 goto error;
1876                 } else {
1877                         if (index < api_max)
1878                                 IL_ERR("Loaded firmware %s, "
1879                                         "which is deprecated. "
1880                                         " Please use API v%u instead.\n",
1881                                           buf, api_max);
1882                         D_INFO("Got firmware '%s' file "
1883                                        "(%zd bytes) from disk\n",
1884                                        buf, ucode_raw->size);
1885                         break;
1886                 }
1887         }
1888
1889         if (ret < 0)
1890                 goto error;
1891
1892         /* Make sure that we got at least our header! */
1893         if (ucode_raw->size <  il3945_ucode_get_header_size(1)) {
1894                 IL_ERR("File size way too small!\n");
1895                 ret = -EINVAL;
1896                 goto err_release;
1897         }
1898
1899         /* Data from ucode file:  header followed by uCode images */
1900         ucode = (struct il_ucode_header *)ucode_raw->data;
1901
1902         il->ucode_ver = le32_to_cpu(ucode->ver);
1903         api_ver = IL_UCODE_API(il->ucode_ver);
1904         inst_size = il3945_ucode_get_inst_size(ucode);
1905         data_size = il3945_ucode_get_data_size(ucode);
1906         init_size = il3945_ucode_get_init_size(ucode);
1907         init_data_size = il3945_ucode_get_init_data_size(ucode);
1908         boot_size = il3945_ucode_get_boot_size(ucode);
1909         src = il3945_ucode_get_data(ucode);
1910
1911         /* api_ver should match the api version forming part of the
1912          * firmware filename ... but we don't check for that and only rely
1913          * on the API version read from firmware header from here on forward */
1914
1915         if (api_ver < api_min || api_ver > api_max) {
1916                 IL_ERR("Driver unable to support your firmware API. "
1917                           "Driver supports v%u, firmware is v%u.\n",
1918                           api_max, api_ver);
1919                 il->ucode_ver = 0;
1920                 ret = -EINVAL;
1921                 goto err_release;
1922         }
1923         if (api_ver != api_max)
1924                 IL_ERR("Firmware has old API version. Expected %u, "
1925                           "got %u. New firmware can be obtained "
1926                           "from http://www.intellinuxwireless.org.\n",
1927                           api_max, api_ver);
1928
1929         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1930                 IL_UCODE_MAJOR(il->ucode_ver),
1931                 IL_UCODE_MINOR(il->ucode_ver),
1932                 IL_UCODE_API(il->ucode_ver),
1933                 IL_UCODE_SERIAL(il->ucode_ver));
1934
1935         snprintf(il->hw->wiphy->fw_version,
1936                  sizeof(il->hw->wiphy->fw_version),
1937                  "%u.%u.%u.%u",
1938                  IL_UCODE_MAJOR(il->ucode_ver),
1939                  IL_UCODE_MINOR(il->ucode_ver),
1940                  IL_UCODE_API(il->ucode_ver),
1941                  IL_UCODE_SERIAL(il->ucode_ver));
1942
1943         D_INFO("f/w package hdr ucode version raw = 0x%x\n",
1944                        il->ucode_ver);
1945         D_INFO("f/w package hdr runtime inst size = %u\n",
1946                        inst_size);
1947         D_INFO("f/w package hdr runtime data size = %u\n",
1948                        data_size);
1949         D_INFO("f/w package hdr init inst size = %u\n",
1950                        init_size);
1951         D_INFO("f/w package hdr init data size = %u\n",
1952                        init_data_size);
1953         D_INFO("f/w package hdr boot inst size = %u\n",
1954                        boot_size);
1955
1956
1957         /* Verify size of file vs. image size info in file's header */
1958         if (ucode_raw->size != il3945_ucode_get_header_size(api_ver) +
1959                 inst_size + data_size + init_size +
1960                 init_data_size + boot_size) {
1961
1962                 D_INFO(
1963                         "uCode file size %zd does not match expected size\n",
1964                         ucode_raw->size);
1965                 ret = -EINVAL;
1966                 goto err_release;
1967         }
1968
1969         /* Verify that uCode images will fit in card's SRAM */
1970         if (inst_size > IL39_MAX_INST_SIZE) {
1971                 D_INFO("uCode instr len %d too large to fit in\n",
1972                                inst_size);
1973                 ret = -EINVAL;
1974                 goto err_release;
1975         }
1976
1977         if (data_size > IL39_MAX_DATA_SIZE) {
1978                 D_INFO("uCode data len %d too large to fit in\n",
1979                                data_size);
1980                 ret = -EINVAL;
1981                 goto err_release;
1982         }
1983         if (init_size > IL39_MAX_INST_SIZE) {
1984                 D_INFO(
1985                                 "uCode init instr len %d too large to fit in\n",
1986                                 init_size);
1987                 ret = -EINVAL;
1988                 goto err_release;
1989         }
1990         if (init_data_size > IL39_MAX_DATA_SIZE) {
1991                 D_INFO(
1992                                 "uCode init data len %d too large to fit in\n",
1993                                 init_data_size);
1994                 ret = -EINVAL;
1995                 goto err_release;
1996         }
1997         if (boot_size > IL39_MAX_BSM_SIZE) {
1998                 D_INFO(
1999                                 "uCode boot instr len %d too large to fit in\n",
2000                                 boot_size);
2001                 ret = -EINVAL;
2002                 goto err_release;
2003         }
2004
2005         /* Allocate ucode buffers for card's bus-master loading ... */
2006
2007         /* Runtime instructions and 2 copies of data:
2008          * 1) unmodified from disk
2009          * 2) backup cache for save/restore during power-downs */
2010         il->ucode_code.len = inst_size;
2011         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
2012
2013         il->ucode_data.len = data_size;
2014         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
2015
2016         il->ucode_data_backup.len = data_size;
2017         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
2018
2019         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
2020             !il->ucode_data_backup.v_addr)
2021                 goto err_pci_alloc;
2022
2023         /* Initialization instructions and data */
2024         if (init_size && init_data_size) {
2025                 il->ucode_init.len = init_size;
2026                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
2027
2028                 il->ucode_init_data.len = init_data_size;
2029                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
2030
2031                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
2032                         goto err_pci_alloc;
2033         }
2034
2035         /* Bootstrap (instructions only, no data) */
2036         if (boot_size) {
2037                 il->ucode_boot.len = boot_size;
2038                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
2039
2040                 if (!il->ucode_boot.v_addr)
2041                         goto err_pci_alloc;
2042         }
2043
2044         /* Copy images into buffers for card's bus-master reads ... */
2045
2046         /* Runtime instructions (first block of data in file) */
2047         len = inst_size;
2048         D_INFO(
2049                 "Copying (but not loading) uCode instr len %zd\n", len);
2050         memcpy(il->ucode_code.v_addr, src, len);
2051         src += len;
2052
2053         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2054                 il->ucode_code.v_addr, (u32)il->ucode_code.p_addr);
2055
2056         /* Runtime data (2nd block)
2057          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2058         len = data_size;
2059         D_INFO(
2060                 "Copying (but not loading) uCode data len %zd\n", len);
2061         memcpy(il->ucode_data.v_addr, src, len);
2062         memcpy(il->ucode_data_backup.v_addr, src, len);
2063         src += len;
2064
2065         /* Initialization instructions (3rd block) */
2066         if (init_size) {
2067                 len = init_size;
2068                 D_INFO(
2069                         "Copying (but not loading) init instr len %zd\n", len);
2070                 memcpy(il->ucode_init.v_addr, src, len);
2071                 src += len;
2072         }
2073
2074         /* Initialization data (4th block) */
2075         if (init_data_size) {
2076                 len = init_data_size;
2077                 D_INFO(
2078                         "Copying (but not loading) init data len %zd\n", len);
2079                 memcpy(il->ucode_init_data.v_addr, src, len);
2080                 src += len;
2081         }
2082
2083         /* Bootstrap instructions (5th block) */
2084         len = boot_size;
2085         D_INFO(
2086                 "Copying (but not loading) boot instr len %zd\n", len);
2087         memcpy(il->ucode_boot.v_addr, src, len);
2088
2089         /* We have our copies now, allow OS release its copies */
2090         release_firmware(ucode_raw);
2091         return 0;
2092
2093  err_pci_alloc:
2094         IL_ERR("failed to allocate pci memory\n");
2095         ret = -ENOMEM;
2096         il3945_dealloc_ucode_pci(il);
2097
2098  err_release:
2099         release_firmware(ucode_raw);
2100
2101  error:
2102         return ret;
2103 }
2104
2105
2106 /**
2107  * il3945_set_ucode_ptrs - Set uCode address location
2108  *
2109  * Tell initialization uCode where to find runtime uCode.
2110  *
2111  * BSM registers initially contain pointers to initialization uCode.
2112  * We need to replace them to load runtime uCode inst and data,
2113  * and to save runtime data when powering down.
2114  */
2115 static int il3945_set_ucode_ptrs(struct il_priv *il)
2116 {
2117         dma_addr_t pinst;
2118         dma_addr_t pdata;
2119
2120         /* bits 31:0 for 3945 */
2121         pinst = il->ucode_code.p_addr;
2122         pdata = il->ucode_data_backup.p_addr;
2123
2124         /* Tell bootstrap uCode where to find image to load */
2125         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2126         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2127         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG,
2128                                  il->ucode_data.len);
2129
2130         /* Inst byte count must be last to set up, bit 31 signals uCode
2131          *   that all new ptr/size info is in place */
2132         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2133                                  il->ucode_code.len | BSM_DRAM_INST_LOAD);
2134
2135         D_INFO("Runtime uCode pointers are set.\n");
2136
2137         return 0;
2138 }
2139
2140 /**
2141  * il3945_init_alive_start - Called after REPLY_ALIVE notification received
2142  *
2143  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2144  *
2145  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2146  */
2147 static void il3945_init_alive_start(struct il_priv *il)
2148 {
2149         /* Check alive response for "valid" sign from uCode */
2150         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2151                 /* We had an error bringing up the hardware, so take it
2152                  * all the way back down so we can try again */
2153                 D_INFO("Initialize Alive failed.\n");
2154                 goto restart;
2155         }
2156
2157         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2158          * This is a paranoid check, because we would not have gotten the
2159          * "initialize" alive if code weren't properly loaded.  */
2160         if (il3945_verify_ucode(il)) {
2161                 /* Runtime instruction load was bad;
2162                  * take it all the way back down so we can try again */
2163                 D_INFO("Bad \"initialize\" uCode load.\n");
2164                 goto restart;
2165         }
2166
2167         /* Send pointers to protocol/runtime uCode image ... init code will
2168          * load and launch runtime uCode, which will send us another "Alive"
2169          * notification. */
2170         D_INFO("Initialization Alive received.\n");
2171         if (il3945_set_ucode_ptrs(il)) {
2172                 /* Runtime instruction load won't happen;
2173                  * take it all the way back down so we can try again */
2174                 D_INFO("Couldn't set up uCode pointers.\n");
2175                 goto restart;
2176         }
2177         return;
2178
2179  restart:
2180         queue_work(il->workqueue, &il->restart);
2181 }
2182
2183 /**
2184  * il3945_alive_start - called after REPLY_ALIVE notification received
2185  *                   from protocol/runtime uCode (initialization uCode's
2186  *                   Alive gets handled by il3945_init_alive_start()).
2187  */
2188 static void il3945_alive_start(struct il_priv *il)
2189 {
2190         int thermal_spin = 0;
2191         u32 rfkill;
2192         struct il_rxon_context *ctx = &il->ctx;
2193
2194         D_INFO("Runtime Alive received.\n");
2195
2196         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2197                 /* We had an error bringing up the hardware, so take it
2198                  * all the way back down so we can try again */
2199                 D_INFO("Alive failed.\n");
2200                 goto restart;
2201         }
2202
2203         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2204          * This is a paranoid check, because we would not have gotten the
2205          * "runtime" alive if code weren't properly loaded.  */
2206         if (il3945_verify_ucode(il)) {
2207                 /* Runtime instruction load was bad;
2208                  * take it all the way back down so we can try again */
2209                 D_INFO("Bad runtime uCode load.\n");
2210                 goto restart;
2211         }
2212
2213         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2214         D_INFO("RFKILL status: 0x%x\n", rfkill);
2215
2216         if (rfkill & 0x1) {
2217                 clear_bit(STATUS_RF_KILL_HW, &il->status);
2218                 /* if RFKILL is not on, then wait for thermal
2219                  * sensor in adapter to kick in */
2220                 while (il3945_hw_get_temperature(il) == 0) {
2221                         thermal_spin++;
2222                         udelay(10);
2223                 }
2224
2225                 if (thermal_spin)
2226                         D_INFO("Thermal calibration took %dus\n",
2227                                        thermal_spin * 10);
2228         } else
2229                 set_bit(STATUS_RF_KILL_HW, &il->status);
2230
2231         /* After the ALIVE response, we can send commands to 3945 uCode */
2232         set_bit(STATUS_ALIVE, &il->status);
2233
2234         /* Enable watchdog to monitor the driver tx queues */
2235         il_setup_watchdog(il);
2236
2237         if (il_is_rfkill(il))
2238                 return;
2239
2240         ieee80211_wake_queues(il->hw);
2241
2242         il->active_rate = IL_RATES_MASK_3945;
2243
2244         il_power_update_mode(il, true);
2245
2246         if (il_is_associated(il)) {
2247                 struct il3945_rxon_cmd *active_rxon =
2248                                 (struct il3945_rxon_cmd *)(&ctx->active);
2249
2250                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2251                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2252         } else {
2253                 /* Initialize our rx_config data */
2254                 il_connection_init_rx_config(il, ctx);
2255         }
2256
2257         /* Configure Bluetooth device coexistence support */
2258         il_send_bt_config(il);
2259
2260         set_bit(STATUS_READY, &il->status);
2261
2262         /* Configure the adapter for unassociated operation */
2263         il3945_commit_rxon(il, ctx);
2264
2265         il3945_reg_txpower_periodic(il);
2266
2267         D_INFO("ALIVE processing complete.\n");
2268         wake_up(&il->wait_command_queue);
2269
2270         return;
2271
2272  restart:
2273         queue_work(il->workqueue, &il->restart);
2274 }
2275
2276 static void il3945_cancel_deferred_work(struct il_priv *il);
2277
2278 static void __il3945_down(struct il_priv *il)
2279 {
2280         unsigned long flags;
2281         int exit_pending;
2282
2283         D_INFO(DRV_NAME " is going down\n");
2284
2285         il_scan_cancel_timeout(il, 200);
2286
2287         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &il->status);
2288
2289         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2290          * to prevent rearm timer */
2291         del_timer_sync(&il->watchdog);
2292
2293         /* Station information will now be cleared in device */
2294         il_clear_ucode_stations(il, NULL);
2295         il_dealloc_bcast_stations(il);
2296         il_clear_driver_stations(il);
2297
2298         /* Unblock any waiting calls */
2299         wake_up_all(&il->wait_command_queue);
2300
2301         /* Wipe out the EXIT_PENDING status bit if we are not actually
2302          * exiting the module */
2303         if (!exit_pending)
2304                 clear_bit(STATUS_EXIT_PENDING, &il->status);
2305
2306         /* stop and reset the on-board processor */
2307         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2308
2309         /* tell the device to stop sending interrupts */
2310         spin_lock_irqsave(&il->lock, flags);
2311         il_disable_interrupts(il);
2312         spin_unlock_irqrestore(&il->lock, flags);
2313         il3945_synchronize_irq(il);
2314
2315         if (il->mac80211_registered)
2316                 ieee80211_stop_queues(il->hw);
2317
2318         /* If we have not previously called il3945_init() then
2319          * clear all bits but the RF Kill bits and return */
2320         if (!il_is_init(il)) {
2321                 il->status = test_bit(STATUS_RF_KILL_HW, &il->status) <<
2322                                         STATUS_RF_KILL_HW |
2323                                test_bit(STATUS_GEO_CONFIGURED, &il->status) <<
2324                                         STATUS_GEO_CONFIGURED |
2325                                 test_bit(STATUS_EXIT_PENDING, &il->status) <<
2326                                         STATUS_EXIT_PENDING;
2327                 goto exit;
2328         }
2329
2330         /* ...otherwise clear out all the status bits but the RF Kill
2331          * bit and continue taking the NIC down. */
2332         il->status &= test_bit(STATUS_RF_KILL_HW, &il->status) <<
2333                                 STATUS_RF_KILL_HW |
2334                         test_bit(STATUS_GEO_CONFIGURED, &il->status) <<
2335                                 STATUS_GEO_CONFIGURED |
2336                         test_bit(STATUS_FW_ERROR, &il->status) <<
2337                                 STATUS_FW_ERROR |
2338                         test_bit(STATUS_EXIT_PENDING, &il->status) <<
2339                                 STATUS_EXIT_PENDING;
2340
2341         il3945_hw_txq_ctx_stop(il);
2342         il3945_hw_rxq_stop(il);
2343
2344         /* Power-down device's busmaster DMA clocks */
2345         il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2346         udelay(5);
2347
2348         /* Stop the device, and put it in low power state */
2349         il_apm_stop(il);
2350
2351  exit:
2352         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2353
2354         if (il->beacon_skb)
2355                 dev_kfree_skb(il->beacon_skb);
2356         il->beacon_skb = NULL;
2357
2358         /* clear out any free frames */
2359         il3945_clear_free_frames(il);
2360 }
2361
2362 static void il3945_down(struct il_priv *il)
2363 {
2364         mutex_lock(&il->mutex);
2365         __il3945_down(il);
2366         mutex_unlock(&il->mutex);
2367
2368         il3945_cancel_deferred_work(il);
2369 }
2370
2371 #define MAX_HW_RESTARTS 5
2372
2373 static int il3945_alloc_bcast_station(struct il_priv *il)
2374 {
2375         struct il_rxon_context *ctx = &il->ctx;
2376         unsigned long flags;
2377         u8 sta_id;
2378
2379         spin_lock_irqsave(&il->sta_lock, flags);
2380         sta_id = il_prep_station(il, ctx,
2381                                         il_bcast_addr, false, NULL);
2382         if (sta_id == IL_INVALID_STATION) {
2383                 IL_ERR("Unable to prepare broadcast station\n");
2384                 spin_unlock_irqrestore(&il->sta_lock, flags);
2385
2386                 return -EINVAL;
2387         }
2388
2389         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2390         il->stations[sta_id].used |= IL_STA_BCAST;
2391         spin_unlock_irqrestore(&il->sta_lock, flags);
2392
2393         return 0;
2394 }
2395
2396 static int __il3945_up(struct il_priv *il)
2397 {
2398         int rc, i;
2399
2400         rc = il3945_alloc_bcast_station(il);
2401         if (rc)
2402                 return rc;
2403
2404         if (test_bit(STATUS_EXIT_PENDING, &il->status)) {
2405                 IL_WARN("Exit pending; will not bring the NIC up\n");
2406                 return -EIO;
2407         }
2408
2409         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2410                 IL_ERR("ucode not available for device bring up\n");
2411                 return -EIO;
2412         }
2413
2414         /* If platform's RF_KILL switch is NOT set to KILL */
2415         if (_il_rd(il, CSR_GP_CNTRL) &
2416                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2417                 clear_bit(STATUS_RF_KILL_HW, &il->status);
2418         else {
2419                 set_bit(STATUS_RF_KILL_HW, &il->status);
2420                 IL_WARN("Radio disabled by HW RF Kill switch\n");
2421                 return -ENODEV;
2422         }
2423
2424         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2425
2426         rc = il3945_hw_nic_init(il);
2427         if (rc) {
2428                 IL_ERR("Unable to int nic\n");
2429                 return rc;
2430         }
2431
2432         /* make sure rfkill handshake bits are cleared */
2433         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2434         _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
2435                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2436
2437         /* clear (again), then enable host interrupts */
2438         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2439         il_enable_interrupts(il);
2440
2441         /* really make sure rfkill handshake bits are cleared */
2442         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2443         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2444
2445         /* Copy original ucode data image from disk into backup cache.
2446          * This will be used to initialize the on-board processor's
2447          * data SRAM for a clean start when the runtime program first loads. */
2448         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2449                il->ucode_data.len);
2450
2451         /* We return success when we resume from suspend and rf_kill is on. */
2452         if (test_bit(STATUS_RF_KILL_HW, &il->status))
2453                 return 0;
2454
2455         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2456
2457                 /* load bootstrap state machine,
2458                  * load bootstrap program into processor's memory,
2459                  * prepare to load the "initialize" uCode */
2460                 rc = il->cfg->ops->lib->load_ucode(il);
2461
2462                 if (rc) {
2463                         IL_ERR(
2464                                 "Unable to set up bootstrap uCode: %d\n", rc);
2465                         continue;
2466                 }
2467
2468                 /* start card; "initialize" will load runtime ucode */
2469                 il3945_nic_start(il);
2470
2471                 D_INFO(DRV_NAME " is coming up\n");
2472
2473                 return 0;
2474         }
2475
2476         set_bit(STATUS_EXIT_PENDING, &il->status);
2477         __il3945_down(il);
2478         clear_bit(STATUS_EXIT_PENDING, &il->status);
2479
2480         /* tried to restart and config the device for as long as our
2481          * patience could withstand */
2482         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2483         return -EIO;
2484 }
2485
2486
2487 /*****************************************************************************
2488  *
2489  * Workqueue callbacks
2490  *
2491  *****************************************************************************/
2492
2493 static void il3945_bg_init_alive_start(struct work_struct *data)
2494 {
2495         struct il_priv *il =
2496             container_of(data, struct il_priv, init_alive_start.work);
2497
2498         mutex_lock(&il->mutex);
2499         if (test_bit(STATUS_EXIT_PENDING, &il->status))
2500                 goto out;
2501
2502         il3945_init_alive_start(il);
2503 out:
2504         mutex_unlock(&il->mutex);
2505 }
2506
2507 static void il3945_bg_alive_start(struct work_struct *data)
2508 {
2509         struct il_priv *il =
2510             container_of(data, struct il_priv, alive_start.work);
2511
2512         mutex_lock(&il->mutex);
2513         if (test_bit(STATUS_EXIT_PENDING, &il->status))
2514                 goto out;
2515
2516         il3945_alive_start(il);
2517 out:
2518         mutex_unlock(&il->mutex);
2519 }
2520
2521 /*
2522  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2523  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2524  * *is* readable even when device has been SW_RESET into low power mode
2525  * (e.g. during RF KILL).
2526  */
2527 static void il3945_rfkill_poll(struct work_struct *data)
2528 {
2529         struct il_priv *il =
2530             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2531         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &il->status);
2532         bool new_rfkill = !(_il_rd(il, CSR_GP_CNTRL)
2533                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2534
2535         if (new_rfkill != old_rfkill) {
2536                 if (new_rfkill)
2537                         set_bit(STATUS_RF_KILL_HW, &il->status);
2538                 else
2539                         clear_bit(STATUS_RF_KILL_HW, &il->status);
2540
2541                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2542
2543                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2544                                 new_rfkill ? "disable radio" : "enable radio");
2545         }
2546
2547         /* Keep this running, even if radio now enabled.  This will be
2548          * cancelled in mac_start() if system decides to start again */
2549         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2550                            round_jiffies_relative(2 * HZ));
2551
2552 }
2553
2554 int il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2555 {
2556         struct il_host_cmd cmd = {
2557                 .id = REPLY_SCAN_CMD,
2558                 .len = sizeof(struct il3945_scan_cmd),
2559                 .flags = CMD_SIZE_HUGE,
2560         };
2561         struct il3945_scan_cmd *scan;
2562         u8 n_probes = 0;
2563         enum ieee80211_band band;
2564         bool is_active = false;
2565         int ret;
2566         u16 len;
2567
2568         lockdep_assert_held(&il->mutex);
2569
2570         if (!il->scan_cmd) {
2571                 il->scan_cmd = kmalloc(sizeof(struct il3945_scan_cmd) +
2572                                          IL_MAX_SCAN_SIZE, GFP_KERNEL);
2573                 if (!il->scan_cmd) {
2574                         D_SCAN("Fail to allocate scan memory\n");
2575                         return -ENOMEM;
2576                 }
2577         }
2578         scan = il->scan_cmd;
2579         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2580
2581         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2582         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2583
2584         if (il_is_associated(il)) {
2585                 u16 interval;
2586                 u32 extra;
2587                 u32 suspend_time = 100;
2588                 u32 scan_suspend_time = 100;
2589
2590                 D_INFO("Scanning while associated...\n");
2591
2592                 interval = vif->bss_conf.beacon_int;
2593
2594                 scan->suspend_time = 0;
2595                 scan->max_out_time = cpu_to_le32(200 * 1024);
2596                 if (!interval)
2597                         interval = suspend_time;
2598                 /*
2599                  * suspend time format:
2600                  *  0-19: beacon interval in usec (time before exec.)
2601                  * 20-23: 0
2602                  * 24-31: number of beacons (suspend between channels)
2603                  */
2604
2605                 extra = (suspend_time / interval) << 24;
2606                 scan_suspend_time = 0xFF0FFFFF &
2607                     (extra | ((suspend_time % interval) * 1024));
2608
2609                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2610                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2611                                scan_suspend_time, interval);
2612         }
2613
2614         if (il->scan_request->n_ssids) {
2615                 int i, p = 0;
2616                 D_SCAN("Kicking off active scan\n");
2617                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2618                         /* always does wildcard anyway */
2619                         if (!il->scan_request->ssids[i].ssid_len)
2620                                 continue;
2621                         scan->direct_scan[p].id = WLAN_EID_SSID;
2622                         scan->direct_scan[p].len =
2623                                 il->scan_request->ssids[i].ssid_len;
2624                         memcpy(scan->direct_scan[p].ssid,
2625                                il->scan_request->ssids[i].ssid,
2626                                il->scan_request->ssids[i].ssid_len);
2627                         n_probes++;
2628                         p++;
2629                 }
2630                 is_active = true;
2631         } else
2632                 D_SCAN("Kicking off passive scan.\n");
2633
2634         /* We don't build a direct scan probe request; the uCode will do
2635          * that based on the direct_mask added to each channel entry */
2636         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2637         scan->tx_cmd.sta_id = il->ctx.bcast_sta_id;
2638         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2639
2640         /* flags + rate selection */
2641
2642         switch (il->scan_band) {
2643         case IEEE80211_BAND_2GHZ:
2644                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2645                 scan->tx_cmd.rate = IL_RATE_1M_PLCP;
2646                 band = IEEE80211_BAND_2GHZ;
2647                 break;
2648         case IEEE80211_BAND_5GHZ:
2649                 scan->tx_cmd.rate = IL_RATE_6M_PLCP;
2650                 band = IEEE80211_BAND_5GHZ;
2651                 break;
2652         default:
2653                 IL_WARN("Invalid scan band\n");
2654                 return -EIO;
2655         }
2656
2657         /*
2658          * If active scaning is requested but a certain channel
2659          * is marked passive, we can do active scanning if we
2660          * detect transmissions.
2661          */
2662         scan->good_CRC_th = is_active ? IL_GOOD_CRC_TH_DEFAULT :
2663                                         IL_GOOD_CRC_TH_DISABLED;
2664
2665         len = il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2666                                         vif->addr, il->scan_request->ie,
2667                                         il->scan_request->ie_len,
2668                                         IL_MAX_SCAN_SIZE - sizeof(*scan));
2669         scan->tx_cmd.len = cpu_to_le16(len);
2670
2671         /* select Rx antennas */
2672         scan->flags |= il3945_get_antenna_flags(il);
2673
2674         scan->channel_count = il3945_get_channels_for_scan(il, band, is_active, n_probes,
2675                                                             (void *)&scan->data[len], vif);
2676         if (scan->channel_count == 0) {
2677                 D_SCAN("channel count %d\n", scan->channel_count);
2678                 return -EIO;
2679         }
2680
2681         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2682             scan->channel_count * sizeof(struct il3945_scan_channel);
2683         cmd.data = scan;
2684         scan->len = cpu_to_le16(cmd.len);
2685
2686         set_bit(STATUS_SCAN_HW, &il->status);
2687         ret = il_send_cmd_sync(il, &cmd);
2688         if (ret)
2689                 clear_bit(STATUS_SCAN_HW, &il->status);
2690         return ret;
2691 }
2692
2693 void il3945_post_scan(struct il_priv *il)
2694 {
2695         struct il_rxon_context *ctx = &il->ctx;
2696
2697         /*
2698          * Since setting the RXON may have been deferred while
2699          * performing the scan, fire one off if needed
2700          */
2701         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
2702                 il3945_commit_rxon(il, ctx);
2703 }
2704
2705 static void il3945_bg_restart(struct work_struct *data)
2706 {
2707         struct il_priv *il = container_of(data, struct il_priv, restart);
2708
2709         if (test_bit(STATUS_EXIT_PENDING, &il->status))
2710                 return;
2711
2712         if (test_and_clear_bit(STATUS_FW_ERROR, &il->status)) {
2713                 struct il_rxon_context *ctx;
2714                 mutex_lock(&il->mutex);
2715                 for_each_context(il, ctx)
2716                         ctx->vif = NULL;
2717                 il->is_open = 0;
2718                 mutex_unlock(&il->mutex);
2719                 il3945_down(il);
2720                 ieee80211_restart_hw(il->hw);
2721         } else {
2722                 il3945_down(il);
2723
2724                 mutex_lock(&il->mutex);
2725                 if (test_bit(STATUS_EXIT_PENDING, &il->status)) {
2726                         mutex_unlock(&il->mutex);
2727                         return;
2728                 }
2729
2730                 __il3945_up(il);
2731                 mutex_unlock(&il->mutex);
2732         }
2733 }
2734
2735 static void il3945_bg_rx_replenish(struct work_struct *data)
2736 {
2737         struct il_priv *il =
2738             container_of(data, struct il_priv, rx_replenish);
2739
2740         mutex_lock(&il->mutex);
2741         if (test_bit(STATUS_EXIT_PENDING, &il->status))
2742                 goto out;
2743
2744         il3945_rx_replenish(il);
2745 out:
2746         mutex_unlock(&il->mutex);
2747 }
2748
2749 void il3945_post_associate(struct il_priv *il)
2750 {
2751         int rc = 0;
2752         struct ieee80211_conf *conf = NULL;
2753         struct il_rxon_context *ctx = &il->ctx;
2754
2755         if (!ctx->vif || !il->is_open)
2756                 return;
2757
2758         D_ASSOC("Associated as %d to: %pM\n",
2759                         ctx->vif->bss_conf.aid, ctx->active.bssid_addr);
2760
2761         if (test_bit(STATUS_EXIT_PENDING, &il->status))
2762                 return;
2763
2764         il_scan_cancel_timeout(il, 200);
2765
2766         conf = il_ieee80211_get_hw_conf(il->hw);
2767
2768         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2769         il3945_commit_rxon(il, ctx);
2770
2771         rc = il_send_rxon_timing(il, ctx);
2772         if (rc)
2773                 IL_WARN("REPLY_RXON_TIMING failed - "
2774                             "Attempting to continue.\n");
2775
2776         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2777
2778         ctx->staging.assoc_id = cpu_to_le16(ctx->vif->bss_conf.aid);
2779
2780         D_ASSOC("assoc id %d beacon interval %d\n",
2781                         ctx->vif->bss_conf.aid, ctx->vif->bss_conf.beacon_int);
2782
2783         if (ctx->vif->bss_conf.use_short_preamble)
2784                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2785         else
2786                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2787
2788         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2789                 if (ctx->vif->bss_conf.use_short_slot)
2790                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2791                 else
2792                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2793         }
2794
2795         il3945_commit_rxon(il, ctx);
2796
2797         switch (ctx->vif->type) {
2798         case NL80211_IFTYPE_STATION:
2799                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2800                 break;
2801         case NL80211_IFTYPE_ADHOC:
2802                 il3945_send_beacon_cmd(il);
2803                 break;
2804         default:
2805                 IL_ERR("%s Should not be called in %d mode\n",
2806                         __func__, ctx->vif->type);
2807                 break;
2808         }
2809 }
2810
2811 /*****************************************************************************
2812  *
2813  * mac80211 entry point functions
2814  *
2815  *****************************************************************************/
2816
2817 #define UCODE_READY_TIMEOUT     (2 * HZ)
2818
2819 static int il3945_mac_start(struct ieee80211_hw *hw)
2820 {
2821         struct il_priv *il = hw->priv;
2822         int ret;
2823
2824         D_MAC80211("enter\n");
2825
2826         /* we should be verifying the device is ready to be opened */
2827         mutex_lock(&il->mutex);
2828
2829         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2830          * ucode filename and max sizes are card-specific. */
2831
2832         if (!il->ucode_code.len) {
2833                 ret = il3945_read_ucode(il);
2834                 if (ret) {
2835                         IL_ERR("Could not read microcode: %d\n", ret);
2836                         mutex_unlock(&il->mutex);
2837                         goto out_release_irq;
2838                 }
2839         }
2840
2841         ret = __il3945_up(il);
2842
2843         mutex_unlock(&il->mutex);
2844
2845         if (ret)
2846                 goto out_release_irq;
2847
2848         D_INFO("Start UP work.\n");
2849
2850         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2851          * mac80211 will not be run successfully. */
2852         ret = wait_event_timeout(il->wait_command_queue,
2853                         test_bit(STATUS_READY, &il->status),
2854                         UCODE_READY_TIMEOUT);
2855         if (!ret) {
2856                 if (!test_bit(STATUS_READY, &il->status)) {
2857                         IL_ERR(
2858                                 "Wait for START_ALIVE timeout after %dms.\n",
2859                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2860                         ret = -ETIMEDOUT;
2861                         goto out_release_irq;
2862                 }
2863         }
2864
2865         /* ucode is running and will send rfkill notifications,
2866          * no need to poll the killswitch state anymore */
2867         cancel_delayed_work(&il->_3945.rfkill_poll);
2868
2869         il->is_open = 1;
2870         D_MAC80211("leave\n");
2871         return 0;
2872
2873 out_release_irq:
2874         il->is_open = 0;
2875         D_MAC80211("leave - failed\n");
2876         return ret;
2877 }
2878
2879 static void il3945_mac_stop(struct ieee80211_hw *hw)
2880 {
2881         struct il_priv *il = hw->priv;
2882
2883         D_MAC80211("enter\n");
2884
2885         if (!il->is_open) {
2886                 D_MAC80211("leave - skip\n");
2887                 return;
2888         }
2889
2890         il->is_open = 0;
2891
2892         il3945_down(il);
2893
2894         flush_workqueue(il->workqueue);
2895
2896         /* start polling the killswitch state again */
2897         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2898                            round_jiffies_relative(2 * HZ));
2899
2900         D_MAC80211("leave\n");
2901 }
2902
2903 static void il3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2904 {
2905         struct il_priv *il = hw->priv;
2906
2907         D_MAC80211("enter\n");
2908
2909         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2910                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2911
2912         if (il3945_tx_skb(il, skb))
2913                 dev_kfree_skb_any(skb);
2914
2915         D_MAC80211("leave\n");
2916 }
2917
2918 void il3945_config_ap(struct il_priv *il)
2919 {
2920         struct il_rxon_context *ctx = &il->ctx;
2921         struct ieee80211_vif *vif = ctx->vif;
2922         int rc = 0;
2923
2924         if (test_bit(STATUS_EXIT_PENDING, &il->status))
2925                 return;
2926
2927         /* The following should be done only at AP bring up */
2928         if (!(il_is_associated(il))) {
2929
2930                 /* RXON - unassoc (to set timing command) */
2931                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2932                 il3945_commit_rxon(il, ctx);
2933
2934                 /* RXON Timing */
2935                 rc = il_send_rxon_timing(il, ctx);
2936                 if (rc)
2937                         IL_WARN("REPLY_RXON_TIMING failed - "
2938                                         "Attempting to continue.\n");
2939
2940                 ctx->staging.assoc_id = 0;
2941
2942                 if (vif->bss_conf.use_short_preamble)
2943                         ctx->staging.flags |=
2944                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2945                 else
2946                         ctx->staging.flags &=
2947                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2948
2949                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2950                         if (vif->bss_conf.use_short_slot)
2951                                 ctx->staging.flags |=
2952                                         RXON_FLG_SHORT_SLOT_MSK;
2953                         else
2954                                 ctx->staging.flags &=
2955                                         ~RXON_FLG_SHORT_SLOT_MSK;
2956                 }
2957                 /* restore RXON assoc */
2958                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2959                 il3945_commit_rxon(il, ctx);
2960         }
2961         il3945_send_beacon_cmd(il);
2962 }
2963
2964 static int il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2965                                struct ieee80211_vif *vif,
2966                                struct ieee80211_sta *sta,
2967                                struct ieee80211_key_conf *key)
2968 {
2969         struct il_priv *il = hw->priv;
2970         int ret = 0;
2971         u8 sta_id = IL_INVALID_STATION;
2972         u8 static_key;
2973
2974         D_MAC80211("enter\n");
2975
2976         if (il3945_mod_params.sw_crypto) {
2977                 D_MAC80211("leave - hwcrypto disabled\n");
2978                 return -EOPNOTSUPP;
2979         }
2980
2981         /*
2982          * To support IBSS RSN, don't program group keys in IBSS, the
2983          * hardware will then not attempt to decrypt the frames.
2984          */
2985         if (vif->type == NL80211_IFTYPE_ADHOC &&
2986             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2987                 return -EOPNOTSUPP;
2988
2989         static_key = !il_is_associated(il);
2990
2991         if (!static_key) {
2992                 sta_id = il_sta_id_or_broadcast(
2993                                 il, &il->ctx, sta);
2994                 if (sta_id == IL_INVALID_STATION)
2995                         return -EINVAL;
2996         }
2997
2998         mutex_lock(&il->mutex);
2999         il_scan_cancel_timeout(il, 100);
3000
3001         switch (cmd) {
3002         case SET_KEY:
3003                 if (static_key)
3004                         ret = il3945_set_static_key(il, key);
3005                 else
3006                         ret = il3945_set_dynamic_key(il, key, sta_id);
3007                 D_MAC80211("enable hwcrypto key\n");
3008                 break;
3009         case DISABLE_KEY:
3010                 if (static_key)
3011                         ret = il3945_remove_static_key(il);
3012                 else
3013                         ret = il3945_clear_sta_key_info(il, sta_id);
3014                 D_MAC80211("disable hwcrypto key\n");
3015                 break;
3016         default:
3017                 ret = -EINVAL;
3018         }
3019
3020         mutex_unlock(&il->mutex);
3021         D_MAC80211("leave\n");
3022
3023         return ret;
3024 }
3025
3026 static int il3945_mac_sta_add(struct ieee80211_hw *hw,
3027                                struct ieee80211_vif *vif,
3028                                struct ieee80211_sta *sta)
3029 {
3030         struct il_priv *il = hw->priv;
3031         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3032         int ret;
3033         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3034         u8 sta_id;
3035
3036         D_INFO("received request to add station %pM\n",
3037                         sta->addr);
3038         mutex_lock(&il->mutex);
3039         D_INFO("proceeding to add station %pM\n",
3040                         sta->addr);
3041         sta_priv->common.sta_id = IL_INVALID_STATION;
3042
3043
3044         ret = il_add_station_common(il,
3045                                 &il->ctx,
3046                                      sta->addr, is_ap, sta, &sta_id);
3047         if (ret) {
3048                 IL_ERR("Unable to add station %pM (%d)\n",
3049                         sta->addr, ret);
3050                 /* Should we return success if return code is EEXIST ? */
3051                 mutex_unlock(&il->mutex);
3052                 return ret;
3053         }
3054
3055         sta_priv->common.sta_id = sta_id;
3056
3057         /* Initialize rate scaling */
3058         D_INFO("Initializing rate scaling for station %pM\n",
3059                        sta->addr);
3060         il3945_rs_rate_init(il, sta, sta_id);
3061         mutex_unlock(&il->mutex);
3062
3063         return 0;
3064 }
3065
3066 static void il3945_configure_filter(struct ieee80211_hw *hw,
3067                                      unsigned int changed_flags,
3068                                      unsigned int *total_flags,
3069                                      u64 multicast)
3070 {
3071         struct il_priv *il = hw->priv;
3072         __le32 filter_or = 0, filter_nand = 0;
3073         struct il_rxon_context *ctx = &il->ctx;
3074
3075 #define CHK(test, flag) do { \
3076         if (*total_flags & (test))              \
3077                 filter_or |= (flag);            \
3078         else                                    \
3079                 filter_nand |= (flag);          \
3080         } while (0)
3081
3082         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
3083                         changed_flags, *total_flags);
3084
3085         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3086         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3087         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3088
3089 #undef CHK
3090
3091         mutex_lock(&il->mutex);
3092
3093         ctx->staging.filter_flags &= ~filter_nand;
3094         ctx->staging.filter_flags |= filter_or;
3095
3096         /*
3097          * Not committing directly because hardware can perform a scan,
3098          * but even if hw is ready, committing here breaks for some reason,
3099          * we'll eventually commit the filter flags change anyway.
3100          */
3101
3102         mutex_unlock(&il->mutex);
3103
3104         /*
3105          * Receiving all multicast frames is always enabled by the
3106          * default flags setup in il_connection_init_rx_config()
3107          * since we currently do not support programming multicast
3108          * filters into the device.
3109          */
3110         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3111                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3112 }
3113
3114
3115 /*****************************************************************************
3116  *
3117  * sysfs attributes
3118  *
3119  *****************************************************************************/
3120
3121 #ifdef CONFIG_IWLEGACY_DEBUG
3122
3123 /*
3124  * The following adds a new attribute to the sysfs representation
3125  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3126  * used for controlling the debug level.
3127  *
3128  * See the level definitions in iwl for details.
3129  *
3130  * The debug_level being managed using sysfs below is a per device debug
3131  * level that is used instead of the global debug level if it (the per
3132  * device debug level) is set.
3133  */
3134 static ssize_t il3945_show_debug_level(struct device *d,
3135                                 struct device_attribute *attr, char *buf)
3136 {
3137         struct il_priv *il = dev_get_drvdata(d);
3138         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3139 }
3140 static ssize_t il3945_store_debug_level(struct device *d,
3141                                 struct device_attribute *attr,
3142                                  const char *buf, size_t count)
3143 {
3144         struct il_priv *il = dev_get_drvdata(d);
3145         unsigned long val;
3146         int ret;
3147
3148         ret = strict_strtoul(buf, 0, &val);
3149         if (ret)
3150                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3151         else {
3152                 il->debug_level = val;
3153                 if (il_alloc_traffic_mem(il))
3154                         IL_ERR(
3155                                 "Not enough memory to generate traffic log\n");
3156         }
3157         return strnlen(buf, count);
3158 }
3159
3160 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3161                         il3945_show_debug_level, il3945_store_debug_level);
3162
3163 #endif /* CONFIG_IWLEGACY_DEBUG */
3164
3165 static ssize_t il3945_show_temperature(struct device *d,
3166                                 struct device_attribute *attr, char *buf)
3167 {
3168         struct il_priv *il = dev_get_drvdata(d);
3169
3170         if (!il_is_alive(il))
3171                 return -EAGAIN;
3172
3173         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3174 }
3175
3176 static DEVICE_ATTR(temperature, S_IRUGO, il3945_show_temperature, NULL);
3177
3178 static ssize_t il3945_show_tx_power(struct device *d,
3179                              struct device_attribute *attr, char *buf)
3180 {
3181         struct il_priv *il = dev_get_drvdata(d);
3182         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3183 }
3184
3185 static ssize_t il3945_store_tx_power(struct device *d,
3186                               struct device_attribute *attr,
3187                               const char *buf, size_t count)
3188 {
3189         struct il_priv *il = dev_get_drvdata(d);
3190         char *p = (char *)buf;
3191         u32 val;
3192
3193         val = simple_strtoul(p, &p, 10);
3194         if (p == buf)
3195                 IL_INFO(": %s is not in decimal form.\n", buf);
3196         else
3197                 il3945_hw_reg_set_txpower(il, val);
3198
3199         return count;
3200 }
3201
3202 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il3945_show_tx_power, il3945_store_tx_power);
3203
3204 static ssize_t il3945_show_flags(struct device *d,
3205                           struct device_attribute *attr, char *buf)
3206 {
3207         struct il_priv *il = dev_get_drvdata(d);
3208         struct il_rxon_context *ctx = &il->ctx;
3209
3210         return sprintf(buf, "0x%04X\n", ctx->active.flags);
3211 }
3212
3213 static ssize_t il3945_store_flags(struct device *d,
3214                            struct device_attribute *attr,
3215                            const char *buf, size_t count)
3216 {
3217         struct il_priv *il = dev_get_drvdata(d);
3218         u32 flags = simple_strtoul(buf, NULL, 0);
3219         struct il_rxon_context *ctx = &il->ctx;
3220
3221         mutex_lock(&il->mutex);
3222         if (le32_to_cpu(ctx->staging.flags) != flags) {
3223                 /* Cancel any currently running scans... */
3224                 if (il_scan_cancel_timeout(il, 100))
3225                         IL_WARN("Could not cancel scan.\n");
3226                 else {
3227                         D_INFO("Committing rxon.flags = 0x%04X\n",
3228                                        flags);
3229                         ctx->staging.flags = cpu_to_le32(flags);
3230                         il3945_commit_rxon(il, ctx);
3231                 }
3232         }
3233         mutex_unlock(&il->mutex);
3234
3235         return count;
3236 }
3237
3238 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, il3945_show_flags, il3945_store_flags);
3239
3240 static ssize_t il3945_show_filter_flags(struct device *d,
3241                                  struct device_attribute *attr, char *buf)
3242 {
3243         struct il_priv *il = dev_get_drvdata(d);
3244         struct il_rxon_context *ctx = &il->ctx;
3245
3246         return sprintf(buf, "0x%04X\n",
3247                 le32_to_cpu(ctx->active.filter_flags));
3248 }
3249
3250 static ssize_t il3945_store_filter_flags(struct device *d,
3251                                   struct device_attribute *attr,
3252                                   const char *buf, size_t count)
3253 {
3254         struct il_priv *il = dev_get_drvdata(d);
3255         struct il_rxon_context *ctx = &il->ctx;
3256         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3257
3258         mutex_lock(&il->mutex);
3259         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3260                 /* Cancel any currently running scans... */
3261                 if (il_scan_cancel_timeout(il, 100))
3262                         IL_WARN("Could not cancel scan.\n");
3263                 else {
3264                         D_INFO("Committing rxon.filter_flags = "
3265                                        "0x%04X\n", filter_flags);
3266                         ctx->staging.filter_flags =
3267                                 cpu_to_le32(filter_flags);
3268                         il3945_commit_rxon(il, ctx);
3269                 }
3270         }
3271         mutex_unlock(&il->mutex);
3272
3273         return count;
3274 }
3275
3276 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, il3945_show_filter_flags,
3277                    il3945_store_filter_flags);
3278
3279 static ssize_t il3945_show_measurement(struct device *d,
3280                                 struct device_attribute *attr, char *buf)
3281 {
3282         struct il_priv *il = dev_get_drvdata(d);
3283         struct il_spectrum_notification measure_report;
3284         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3285         u8 *data = (u8 *)&measure_report;
3286         unsigned long flags;
3287
3288         spin_lock_irqsave(&il->lock, flags);
3289         if (!(il->measurement_status & MEASUREMENT_READY)) {
3290                 spin_unlock_irqrestore(&il->lock, flags);
3291                 return 0;
3292         }
3293         memcpy(&measure_report, &il->measure_report, size);
3294         il->measurement_status = 0;
3295         spin_unlock_irqrestore(&il->lock, flags);
3296
3297         while (size && PAGE_SIZE - len) {
3298                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3299                                    PAGE_SIZE - len, 1);
3300                 len = strlen(buf);
3301                 if (PAGE_SIZE - len)
3302                         buf[len++] = '\n';
3303
3304                 ofs += 16;
3305                 size -= min(size, 16U);
3306         }
3307
3308         return len;
3309 }
3310
3311 static ssize_t il3945_store_measurement(struct device *d,
3312                                  struct device_attribute *attr,
3313                                  const char *buf, size_t count)
3314 {
3315         struct il_priv *il = dev_get_drvdata(d);
3316         struct il_rxon_context *ctx = &il->ctx;
3317         struct ieee80211_measurement_params params = {
3318                 .channel = le16_to_cpu(ctx->active.channel),
3319                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3320                 .duration = cpu_to_le16(1),
3321         };
3322         u8 type = IL_MEASURE_BASIC;
3323         u8 buffer[32];
3324         u8 channel;
3325
3326         if (count) {
3327                 char *p = buffer;
3328                 strncpy(buffer, buf, min(sizeof(buffer), count));
3329                 channel = simple_strtoul(p, NULL, 0);
3330                 if (channel)
3331                         params.channel = channel;
3332
3333                 p = buffer;
3334                 while (*p && *p != ' ')
3335                         p++;
3336                 if (*p)
3337                         type = simple_strtoul(p + 1, NULL, 0);
3338         }
3339
3340         D_INFO("Invoking measurement of type %d on "
3341                        "channel %d (for '%s')\n", type, params.channel, buf);
3342         il3945_get_measurement(il, &params, type);
3343
3344         return count;
3345 }
3346
3347 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3348                    il3945_show_measurement, il3945_store_measurement);
3349
3350 static ssize_t il3945_store_retry_rate(struct device *d,
3351                                 struct device_attribute *attr,
3352                                 const char *buf, size_t count)
3353 {
3354         struct il_priv *il = dev_get_drvdata(d);
3355
3356         il->retry_rate = simple_strtoul(buf, NULL, 0);
3357         if (il->retry_rate <= 0)
3358                 il->retry_rate = 1;
3359
3360         return count;
3361 }
3362
3363 static ssize_t il3945_show_retry_rate(struct device *d,
3364                                struct device_attribute *attr, char *buf)
3365 {
3366         struct il_priv *il = dev_get_drvdata(d);
3367         return sprintf(buf, "%d", il->retry_rate);
3368 }
3369
3370 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, il3945_show_retry_rate,
3371                    il3945_store_retry_rate);
3372
3373
3374 static ssize_t il3945_show_channels(struct device *d,
3375                              struct device_attribute *attr, char *buf)
3376 {
3377         /* all this shit doesn't belong into sysfs anyway */
3378         return 0;
3379 }
3380
3381 static DEVICE_ATTR(channels, S_IRUSR, il3945_show_channels, NULL);
3382
3383 static ssize_t il3945_show_antenna(struct device *d,
3384                             struct device_attribute *attr, char *buf)
3385 {
3386         struct il_priv *il = dev_get_drvdata(d);
3387
3388         if (!il_is_alive(il))
3389                 return -EAGAIN;
3390
3391         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3392 }
3393
3394 static ssize_t il3945_store_antenna(struct device *d,
3395                              struct device_attribute *attr,
3396                              const char *buf, size_t count)
3397 {
3398         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3399         int ant;
3400
3401         if (count == 0)
3402                 return 0;
3403
3404         if (sscanf(buf, "%1i", &ant) != 1) {
3405                 D_INFO("not in hex or decimal form.\n");
3406                 return count;
3407         }
3408
3409         if (ant >= 0 && ant <= 2) {
3410                 D_INFO("Setting antenna select to %d.\n", ant);
3411                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3412         } else
3413                 D_INFO("Bad antenna select value %d.\n", ant);
3414
3415
3416         return count;
3417 }
3418
3419 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, il3945_show_antenna, il3945_store_antenna);
3420
3421 static ssize_t il3945_show_status(struct device *d,
3422                            struct device_attribute *attr, char *buf)
3423 {
3424         struct il_priv *il = dev_get_drvdata(d);
3425         if (!il_is_alive(il))
3426                 return -EAGAIN;
3427         return sprintf(buf, "0x%08x\n", (int)il->status);
3428 }
3429
3430 static DEVICE_ATTR(status, S_IRUGO, il3945_show_status, NULL);
3431
3432 static ssize_t il3945_dump_error_log(struct device *d,
3433                               struct device_attribute *attr,
3434                               const char *buf, size_t count)
3435 {
3436         struct il_priv *il = dev_get_drvdata(d);
3437         char *p = (char *)buf;
3438
3439         if (p[0] == '1')
3440                 il3945_dump_nic_error_log(il);
3441
3442         return strnlen(buf, count);
3443 }
3444
3445 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, il3945_dump_error_log);
3446
3447 /*****************************************************************************
3448  *
3449  * driver setup and tear down
3450  *
3451  *****************************************************************************/
3452
3453 static void il3945_setup_deferred_work(struct il_priv *il)
3454 {
3455         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3456
3457         init_waitqueue_head(&il->wait_command_queue);
3458
3459         INIT_WORK(&il->restart, il3945_bg_restart);
3460         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3461         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3462         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3463         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3464
3465         il_setup_scan_deferred_work(il);
3466
3467         il3945_hw_setup_deferred_work(il);
3468
3469         init_timer(&il->watchdog);
3470         il->watchdog.data = (unsigned long)il;
3471         il->watchdog.function = il_bg_watchdog;
3472
3473         tasklet_init(&il->irq_tasklet, (void (*)(unsigned long))
3474                      il3945_irq_tasklet, (unsigned long)il);
3475 }
3476
3477 static void il3945_cancel_deferred_work(struct il_priv *il)
3478 {
3479         il3945_hw_cancel_deferred_work(il);
3480
3481         cancel_delayed_work_sync(&il->init_alive_start);
3482         cancel_delayed_work(&il->alive_start);
3483
3484         il_cancel_scan_deferred_work(il);
3485 }
3486
3487 static struct attribute *il3945_sysfs_entries[] = {
3488         &dev_attr_antenna.attr,
3489         &dev_attr_channels.attr,
3490         &dev_attr_dump_errors.attr,
3491         &dev_attr_flags.attr,
3492         &dev_attr_filter_flags.attr,
3493         &dev_attr_measurement.attr,
3494         &dev_attr_retry_rate.attr,
3495         &dev_attr_status.attr,
3496         &dev_attr_temperature.attr,
3497         &dev_attr_tx_power.attr,
3498 #ifdef CONFIG_IWLEGACY_DEBUG
3499         &dev_attr_debug_level.attr,
3500 #endif
3501         NULL
3502 };
3503
3504 static struct attribute_group il3945_attribute_group = {
3505         .name = NULL,           /* put in device directory */
3506         .attrs = il3945_sysfs_entries,
3507 };
3508
3509 struct ieee80211_ops il3945_hw_ops = {
3510         .tx = il3945_mac_tx,
3511         .start = il3945_mac_start,
3512         .stop = il3945_mac_stop,
3513         .add_interface = il_mac_add_interface,
3514         .remove_interface = il_mac_remove_interface,
3515         .change_interface = il_mac_change_interface,
3516         .config = il_mac_config,
3517         .configure_filter = il3945_configure_filter,
3518         .set_key = il3945_mac_set_key,
3519         .conf_tx = il_mac_conf_tx,
3520         .reset_tsf = il_mac_reset_tsf,
3521         .bss_info_changed = il_mac_bss_info_changed,
3522         .hw_scan = il_mac_hw_scan,
3523         .sta_add = il3945_mac_sta_add,
3524         .sta_remove = il_mac_sta_remove,
3525         .tx_last_beacon = il_mac_tx_last_beacon,
3526 };
3527
3528 static int il3945_init_drv(struct il_priv *il)
3529 {
3530         int ret;
3531         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3532
3533         il->retry_rate = 1;
3534         il->beacon_skb = NULL;
3535
3536         spin_lock_init(&il->sta_lock);
3537         spin_lock_init(&il->hcmd_lock);
3538
3539         INIT_LIST_HEAD(&il->free_frames);
3540
3541         mutex_init(&il->mutex);
3542
3543         il->ieee_channels = NULL;
3544         il->ieee_rates = NULL;
3545         il->band = IEEE80211_BAND_2GHZ;
3546
3547         il->iw_mode = NL80211_IFTYPE_STATION;
3548         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3549
3550         /* initialize force reset */
3551         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3552
3553         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3554                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3555                          eeprom->version);
3556                 ret = -EINVAL;
3557                 goto err;
3558         }
3559         ret = il_init_channel_map(il);
3560         if (ret) {
3561                 IL_ERR("initializing regulatory failed: %d\n", ret);
3562                 goto err;
3563         }
3564
3565         /* Set up txpower settings in driver for all channels */
3566         if (il3945_txpower_set_from_eeprom(il)) {
3567                 ret = -EIO;
3568                 goto err_free_channel_map;
3569         }
3570
3571         ret = il_init_geos(il);
3572         if (ret) {
3573                 IL_ERR("initializing geos failed: %d\n", ret);
3574                 goto err_free_channel_map;
3575         }
3576         il3945_init_hw_rates(il, il->ieee_rates);
3577
3578         return 0;
3579
3580 err_free_channel_map:
3581         il_free_channel_map(il);
3582 err:
3583         return ret;
3584 }
3585
3586 #define IL3945_MAX_PROBE_REQUEST        200
3587
3588 static int il3945_setup_mac(struct il_priv *il)
3589 {
3590         int ret;
3591         struct ieee80211_hw *hw = il->hw;
3592
3593         hw->rate_control_algorithm = "iwl-3945-rs";
3594         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3595         hw->vif_data_size = sizeof(struct il_vif_priv);
3596
3597         /* Tell mac80211 our characteristics */
3598         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3599                     IEEE80211_HW_SPECTRUM_MGMT;
3600
3601         hw->wiphy->interface_modes =
3602                 il->ctx.interface_modes;
3603
3604         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3605                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
3606                             WIPHY_FLAG_IBSS_RSN;
3607
3608         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3609         /* we create the 802.11 header and a zero-length SSID element */
3610         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3611
3612         /* Default value; 4 EDCA QOS priorities */
3613         hw->queues = 4;
3614
3615         if (il->bands[IEEE80211_BAND_2GHZ].n_channels)
3616                 il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3617                         &il->bands[IEEE80211_BAND_2GHZ];
3618
3619         if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
3620                 il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3621                         &il->bands[IEEE80211_BAND_5GHZ];
3622
3623         il_leds_init(il);
3624
3625         ret = ieee80211_register_hw(il->hw);
3626         if (ret) {
3627                 IL_ERR("Failed to register hw (error %d)\n", ret);
3628                 return ret;
3629         }
3630         il->mac80211_registered = 1;
3631
3632         return 0;
3633 }
3634
3635 static int il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3636 {
3637         int err = 0;
3638         struct il_priv *il;
3639         struct ieee80211_hw *hw;
3640         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3641         struct il3945_eeprom *eeprom;
3642         unsigned long flags;
3643
3644         /***********************
3645          * 1. Allocating HW data
3646          * ********************/
3647
3648         /* mac80211 allocates memory for this device instance, including
3649          *   space for this driver's ilate structure */
3650         hw = il_alloc_all(cfg);
3651         if (hw == NULL) {
3652                 pr_err("Can not allocate network device\n");
3653                 err = -ENOMEM;
3654                 goto out;
3655         }
3656         il = hw->priv;
3657         SET_IEEE80211_DEV(hw, &pdev->dev);
3658
3659         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3660
3661         il->ctx.ctxid = 0;
3662
3663         il->ctx.rxon_cmd = REPLY_RXON;
3664         il->ctx.rxon_timing_cmd = REPLY_RXON_TIMING;
3665         il->ctx.rxon_assoc_cmd = REPLY_RXON_ASSOC;
3666         il->ctx.qos_cmd = REPLY_QOS_PARAM;
3667         il->ctx.ap_sta_id = IL_AP_ID;
3668         il->ctx.wep_key_cmd = REPLY_WEPKEY;
3669         il->ctx.interface_modes =
3670                 BIT(NL80211_IFTYPE_STATION) |
3671                 BIT(NL80211_IFTYPE_ADHOC);
3672         il->ctx.ibss_devtype = RXON_DEV_TYPE_IBSS;
3673         il->ctx.station_devtype = RXON_DEV_TYPE_ESS;
3674         il->ctx.unused_devtype = RXON_DEV_TYPE_ESS;
3675
3676         /*
3677          * Disabling hardware scan means that mac80211 will perform scans
3678          * "the hard way", rather than using device's scan.
3679          */
3680         if (il3945_mod_params.disable_hw_scan) {
3681                 D_INFO("Disabling hw_scan\n");
3682                 il3945_hw_ops.hw_scan = NULL;
3683         }
3684
3685         D_INFO("*** LOAD DRIVER ***\n");
3686         il->cfg = cfg;
3687         il->pci_dev = pdev;
3688         il->inta_mask = CSR_INI_SET_MASK;
3689
3690         if (il_alloc_traffic_mem(il))
3691                 IL_ERR("Not enough memory to generate traffic log\n");
3692
3693         /***************************
3694          * 2. Initializing PCI bus
3695          * *************************/
3696         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3697                                 PCIE_LINK_STATE_CLKPM);
3698
3699         if (pci_enable_device(pdev)) {
3700                 err = -ENODEV;
3701                 goto out_ieee80211_free_hw;
3702         }
3703
3704         pci_set_master(pdev);
3705
3706         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3707         if (!err)
3708                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3709         if (err) {
3710                 IL_WARN("No suitable DMA available.\n");
3711                 goto out_pci_disable_device;
3712         }
3713
3714         pci_set_drvdata(pdev, il);
3715         err = pci_request_regions(pdev, DRV_NAME);
3716         if (err)
3717                 goto out_pci_disable_device;
3718
3719         /***********************
3720          * 3. Read REV Register
3721          * ********************/
3722         il->hw_base = pci_iomap(pdev, 0, 0);
3723         if (!il->hw_base) {
3724                 err = -ENODEV;
3725                 goto out_pci_release_regions;
3726         }
3727
3728         D_INFO("pci_resource_len = 0x%08llx\n",
3729                         (unsigned long long) pci_resource_len(pdev, 0));
3730         D_INFO("pci_resource_base = %p\n", il->hw_base);
3731
3732         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3733          * PCI Tx retries from interfering with C3 CPU state */
3734         pci_write_config_byte(pdev, 0x41, 0x00);
3735
3736         /* these spin locks will be used in apm_ops.init and EEPROM access
3737          * we should init now
3738          */
3739         spin_lock_init(&il->reg_lock);
3740         spin_lock_init(&il->lock);
3741
3742         /*
3743          * stop and reset the on-board processor just in case it is in a
3744          * strange state ... like being left stranded by a primary kernel
3745          * and this is now the kdump kernel trying to start up
3746          */
3747         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3748
3749         /***********************
3750          * 4. Read EEPROM
3751          * ********************/
3752
3753         /* Read the EEPROM */
3754         err = il_eeprom_init(il);
3755         if (err) {
3756                 IL_ERR("Unable to init EEPROM\n");
3757                 goto out_iounmap;
3758         }
3759         /* MAC Address location in EEPROM same for 3945/4965 */
3760         eeprom = (struct il3945_eeprom *)il->eeprom;
3761         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3762         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3763
3764         /***********************
3765          * 5. Setup HW Constants
3766          * ********************/
3767         /* Device-specific setup */
3768         if (il3945_hw_set_hw_params(il)) {
3769                 IL_ERR("failed to set hw settings\n");
3770                 goto out_eeprom_free;
3771         }
3772
3773         /***********************
3774          * 6. Setup il
3775          * ********************/
3776
3777         err = il3945_init_drv(il);
3778         if (err) {
3779                 IL_ERR("initializing driver failed\n");
3780                 goto out_unset_hw_params;
3781         }
3782
3783         IL_INFO("Detected Intel Wireless WiFi Link %s\n",
3784                 il->cfg->name);
3785
3786         /***********************
3787          * 7. Setup Services
3788          * ********************/
3789
3790         spin_lock_irqsave(&il->lock, flags);
3791         il_disable_interrupts(il);
3792         spin_unlock_irqrestore(&il->lock, flags);
3793
3794         pci_enable_msi(il->pci_dev);
3795
3796         err = request_irq(il->pci_dev->irq, il_isr,
3797                           IRQF_SHARED, DRV_NAME, il);
3798         if (err) {
3799                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3800                 goto out_disable_msi;
3801         }
3802
3803         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3804         if (err) {
3805                 IL_ERR("failed to create sysfs device attributes\n");
3806                 goto out_release_irq;
3807         }
3808
3809         il_set_rxon_channel(il,
3810                              &il->bands[IEEE80211_BAND_2GHZ].channels[5],
3811                              &il->ctx);
3812         il3945_setup_deferred_work(il);
3813         il3945_setup_rx_handlers(il);
3814         il_power_initialize(il);
3815
3816         /*********************************
3817          * 8. Setup and Register mac80211
3818          * *******************************/
3819
3820         il_enable_interrupts(il);
3821
3822         err = il3945_setup_mac(il);
3823         if (err)
3824                 goto  out_remove_sysfs;
3825
3826         err = il_dbgfs_register(il, DRV_NAME);
3827         if (err)
3828                 IL_ERR("failed to create debugfs files. Ignoring error: %d\n", err);
3829
3830         /* Start monitoring the killswitch */
3831         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
3832                            2 * HZ);
3833
3834         return 0;
3835
3836  out_remove_sysfs:
3837         destroy_workqueue(il->workqueue);
3838         il->workqueue = NULL;
3839         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3840  out_release_irq:
3841         free_irq(il->pci_dev->irq, il);
3842  out_disable_msi:
3843         pci_disable_msi(il->pci_dev);
3844         il_free_geos(il);
3845         il_free_channel_map(il);
3846  out_unset_hw_params:
3847         il3945_unset_hw_params(il);
3848  out_eeprom_free:
3849         il_eeprom_free(il);
3850  out_iounmap:
3851         pci_iounmap(pdev, il->hw_base);
3852  out_pci_release_regions:
3853         pci_release_regions(pdev);
3854  out_pci_disable_device:
3855         pci_set_drvdata(pdev, NULL);
3856         pci_disable_device(pdev);
3857  out_ieee80211_free_hw:
3858         il_free_traffic_mem(il);
3859         ieee80211_free_hw(il->hw);
3860  out:
3861         return err;
3862 }
3863
3864 static void __devexit il3945_pci_remove(struct pci_dev *pdev)
3865 {
3866         struct il_priv *il = pci_get_drvdata(pdev);
3867         unsigned long flags;
3868
3869         if (!il)
3870                 return;
3871
3872         D_INFO("*** UNLOAD DRIVER ***\n");
3873
3874         il_dbgfs_unregister(il);
3875
3876         set_bit(STATUS_EXIT_PENDING, &il->status);
3877
3878         il_leds_exit(il);
3879
3880         if (il->mac80211_registered) {
3881                 ieee80211_unregister_hw(il->hw);
3882                 il->mac80211_registered = 0;
3883         } else {
3884                 il3945_down(il);
3885         }
3886
3887         /*
3888          * Make sure device is reset to low power before unloading driver.
3889          * This may be redundant with il_down(), but there are paths to
3890          * run il_down() without calling apm_ops.stop(), and there are
3891          * paths to avoid running il_down() at all before leaving driver.
3892          * This (inexpensive) call *makes sure* device is reset.
3893          */
3894         il_apm_stop(il);
3895
3896         /* make sure we flush any pending irq or
3897          * tasklet for the driver
3898          */
3899         spin_lock_irqsave(&il->lock, flags);
3900         il_disable_interrupts(il);
3901         spin_unlock_irqrestore(&il->lock, flags);
3902
3903         il3945_synchronize_irq(il);
3904
3905         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3906
3907         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3908
3909         il3945_dealloc_ucode_pci(il);
3910
3911         if (il->rxq.bd)
3912                 il3945_rx_queue_free(il, &il->rxq);
3913         il3945_hw_txq_ctx_free(il);
3914
3915         il3945_unset_hw_params(il);
3916
3917         /*netif_stop_queue(dev); */
3918         flush_workqueue(il->workqueue);
3919
3920         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3921          * il->workqueue... so we can't take down the workqueue
3922          * until now... */
3923         destroy_workqueue(il->workqueue);
3924         il->workqueue = NULL;
3925         il_free_traffic_mem(il);
3926
3927         free_irq(pdev->irq, il);
3928         pci_disable_msi(pdev);
3929
3930         pci_iounmap(pdev, il->hw_base);
3931         pci_release_regions(pdev);
3932         pci_disable_device(pdev);
3933         pci_set_drvdata(pdev, NULL);
3934
3935         il_free_channel_map(il);
3936         il_free_geos(il);
3937         kfree(il->scan_cmd);
3938         if (il->beacon_skb)
3939                 dev_kfree_skb(il->beacon_skb);
3940
3941         ieee80211_free_hw(il->hw);
3942 }
3943
3944
3945 /*****************************************************************************
3946  *
3947  * driver and module entry point
3948  *
3949  *****************************************************************************/
3950
3951 static struct pci_driver il3945_driver = {
3952         .name = DRV_NAME,
3953         .id_table = il3945_hw_card_ids,
3954         .probe = il3945_pci_probe,
3955         .remove = __devexit_p(il3945_pci_remove),
3956         .driver.pm = IL_LEGACY_PM_OPS,
3957 };
3958
3959 static int __init il3945_init(void)
3960 {
3961
3962         int ret;
3963         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3964         pr_info(DRV_COPYRIGHT "\n");
3965
3966         ret = il3945_rate_control_register();
3967         if (ret) {
3968                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3969                 return ret;
3970         }
3971
3972         ret = pci_register_driver(&il3945_driver);
3973         if (ret) {
3974                 pr_err("Unable to initialize PCI module\n");
3975                 goto error_register;
3976         }
3977
3978         return ret;
3979
3980 error_register:
3981         il3945_rate_control_unregister();
3982         return ret;
3983 }
3984
3985 static void __exit il3945_exit(void)
3986 {
3987         pci_unregister_driver(&il3945_driver);
3988         il3945_rate_control_unregister();
3989 }
3990
3991 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3992
3993 module_param_named(antenna, il3945_mod_params.antenna, int, S_IRUGO);
3994 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3995 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, S_IRUGO);
3996 MODULE_PARM_DESC(swcrypto,
3997                 "using software crypto (default 1 [software])");
3998 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan,
3999                 int, S_IRUGO);
4000 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
4001 #ifdef CONFIG_IWLEGACY_DEBUG
4002 module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
4003 MODULE_PARM_DESC(debug, "debug output mask");
4004 #endif
4005 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, S_IRUGO);
4006 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
4007
4008 module_exit(il3945_exit);
4009 module_init(il3945_init);