drivers/net/wireless/iwlegacy/3945-mac.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 "commands.h"
  55 #include "common.h"
  56 #include "3945.h"
  57 #include "iwl-spectrum.h"
  58
  59 /*
  60  * module name, copyright, version, etc.
  61  */
  62
  63 #define DRV_DESCRIPTION \
  64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  65
  66 #ifdef CONFIG_IWLEGACY_DEBUG
  67 #define VD "d"
  68 #else
  69 #define VD
  70 #endif
  71
  72 /*
  73  * add "s" to indicate spectrum measurement included.
  74  * we add it here to be consistent with previous releases in which
  75  * this was configurable.
  76  */
  77 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  78 #define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
  79 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  80
  81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82 MODULE_VERSION(DRV_VERSION);
  83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  84 MODULE_LICENSE("GPL");
  85
  86  /* module parameters */
  87 struct il_mod_params il3945_mod_params = {
  88         .sw_crypto = 1,
  89         .restart_fw = 1,
  90         .disable_hw_scan = 1,
  91         /* the rest are 0 by default */
  92 };
  93
  94 /**
  95  * il3945_get_antenna_flags - Get antenna flags for RXON command
  96  * @il: eeprom and antenna fields are used to determine antenna flags
  97  *
  98  * il->eeprom39  is used to determine if antenna AUX/MAIN are reversed
  99  * il3945_mod_params.antenna specifies the antenna diversity mode:
 100  *
 101  * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 102  * IL_ANTENNA_MAIN      - Force MAIN antenna
 103  * IL_ANTENNA_AUX       - Force AUX antenna
 104  */
 105 __le32 il3945_get_antenna_flags(const struct il_priv *il)
 106 {
 107         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
 108
 109         switch (il3945_mod_params.antenna) {
 110         case IL_ANTENNA_DIVERSITY:
 111                 return 0;
 112
 113         case IL_ANTENNA_MAIN:
 114                 if (eeprom->antenna_switch_type)
 115                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 116                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 117
 118         case IL_ANTENNA_AUX:
 119                 if (eeprom->antenna_switch_type)
 120                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 121                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 122         }
 123
 124         /* bad antenna selector value */
 125         IL_ERR("Bad antenna selector value (0x%x)\n",
 126                 il3945_mod_params.antenna);
 127
 128         return 0;               /* "diversity" is default if error */
 129 }
 130
 131 static int il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
 132                                    struct ieee80211_key_conf *keyconf,
 133                                    u8 sta_id)
 134 {
 135         unsigned long flags;
 136         __le16 key_flags = 0;
 137         int ret;
 138
 139         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 140         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 141
 142         if (sta_id == il->ctx.bcast_sta_id)
 143                 key_flags |= STA_KEY_MULTICAST_MSK;
 144
 145         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 146         keyconf->hw_key_idx = keyconf->keyidx;
 147         key_flags &= ~STA_KEY_FLG_INVALID;
 148
 149         spin_lock_irqsave(&il->sta_lock, flags);
 150         il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 151         il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 152         memcpy(il->stations[sta_id].keyinfo.key, keyconf->key,
 153                keyconf->keylen);
 154
 155         memcpy(il->stations[sta_id].sta.key.key, keyconf->key,
 156                keyconf->keylen);
 157
 158         if ((il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 159                         == STA_KEY_FLG_NO_ENC)
 160                 il->stations[sta_id].sta.key.key_offset =
 161                                  il_get_free_ucode_key_idx(il);
 162         /* else, we are overriding an existing key => no need to allocated room
 163         * in uCode. */
 164
 165         WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 166                 "no space for a new key");
 167
 168         il->stations[sta_id].sta.key.key_flags = key_flags;
 169         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 170         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 171
 172         D_INFO("hwcrypto: modify ucode station key info\n");
 173
 174         ret = il_send_add_sta(il,
 175                                 &il->stations[sta_id].sta, CMD_ASYNC);
 176
 177         spin_unlock_irqrestore(&il->sta_lock, flags);
 178
 179         return ret;
 180 }
 181
 182 static int il3945_set_tkip_dynamic_key_info(struct il_priv *il,
 183                                   struct ieee80211_key_conf *keyconf,
 184                                   u8 sta_id)
 185 {
 186         return -EOPNOTSUPP;
 187 }
 188
 189 static int il3945_set_wep_dynamic_key_info(struct il_priv *il,
 190                                   struct ieee80211_key_conf *keyconf,
 191                                   u8 sta_id)
 192 {
 193         return -EOPNOTSUPP;
 194 }
 195
 196 static int il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
 197 {
 198         unsigned long flags;
 199         struct il_addsta_cmd sta_cmd;
 200
 201         spin_lock_irqsave(&il->sta_lock, flags);
 202         memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
 203         memset(&il->stations[sta_id].sta.key, 0,
 204                 sizeof(struct il4965_keyinfo));
 205         il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 206         il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 207         il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 208         memcpy(&sta_cmd, &il->stations[sta_id].sta, sizeof(struct il_addsta_cmd));
 209         spin_unlock_irqrestore(&il->sta_lock, flags);
 210
 211         D_INFO("hwcrypto: clear ucode station key info\n");
 212         return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
 213 }
 214
 215 static int il3945_set_dynamic_key(struct il_priv *il,
 216                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 217 {
 218         int ret = 0;
 219
 220         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 221
 222         switch (keyconf->cipher) {
 223         case WLAN_CIPHER_SUITE_CCMP:
 224                 ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
 225                 break;
 226         case WLAN_CIPHER_SUITE_TKIP:
 227                 ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
 228                 break;
 229         case WLAN_CIPHER_SUITE_WEP40:
 230         case WLAN_CIPHER_SUITE_WEP104:
 231                 ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
 232                 break;
 233         default:
 234                 IL_ERR("Unknown alg: %s alg=%x\n", __func__,
 235                         keyconf->cipher);
 236                 ret = -EINVAL;
 237         }
 238
 239         D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 240                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 241                       sta_id, ret);
 242
 243         return ret;
 244 }
 245
 246 static int il3945_remove_static_key(struct il_priv *il)
 247 {
 248         int ret = -EOPNOTSUPP;
 249
 250         return ret;
 251 }
 252
 253 static int il3945_set_static_key(struct il_priv *il,
 254                                 struct ieee80211_key_conf *key)
 255 {
 256         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 257             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 258                 return -EOPNOTSUPP;
 259
 260         IL_ERR("Static key invalid: cipher %x\n", key->cipher);
 261         return -EINVAL;
 262 }
 263
 264 static void il3945_clear_free_frames(struct il_priv *il)
 265 {
 266         struct list_head *element;
 267
 268         D_INFO("%d frames on pre-allocated heap on clear.\n",
 269                        il->frames_count);
 270
 271         while (!list_empty(&il->free_frames)) {
 272                 element = il->free_frames.next;
 273                 list_del(element);
 274                 kfree(list_entry(element, struct il3945_frame, list));
 275                 il->frames_count--;
 276         }
 277
 278         if (il->frames_count) {
 279                 IL_WARN("%d frames still in use.  Did we lose one?\n",
 280                             il->frames_count);
 281                 il->frames_count = 0;
 282         }
 283 }
 284
 285 static struct il3945_frame *il3945_get_free_frame(struct il_priv *il)
 286 {
 287         struct il3945_frame *frame;
 288         struct list_head *element;
 289         if (list_empty(&il->free_frames)) {
 290                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 291                 if (!frame) {
 292                         IL_ERR("Could not allocate frame!\n");
 293                         return NULL;
 294                 }
 295
 296                 il->frames_count++;
 297                 return frame;
 298         }
 299
 300         element = il->free_frames.next;
 301         list_del(element);
 302         return list_entry(element, struct il3945_frame, list);
 303 }
 304
 305 static void il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 306 {
 307         memset(frame, 0, sizeof(*frame));
 308         list_add(&frame->list, &il->free_frames);
 309 }
 310
 311 unsigned int il3945_fill_beacon_frame(struct il_priv *il,
 312                                 struct ieee80211_hdr *hdr,
 313                                 int left)
 314 {
 315
 316         if (!il_is_associated(il) || !il->beacon_skb)
 317                 return 0;
 318
 319         if (il->beacon_skb->len > left)
 320                 return 0;
 321
 322         memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 323
 324         return il->beacon_skb->len;
 325 }
 326
 327 static int il3945_send_beacon_cmd(struct il_priv *il)
 328 {
 329         struct il3945_frame *frame;
 330         unsigned int frame_size;
 331         int rc;
 332         u8 rate;
 333
 334         frame = il3945_get_free_frame(il);
 335
 336         if (!frame) {
 337                 IL_ERR("Could not obtain free frame buffer for beacon "
 338                           "command.\n");
 339                 return -ENOMEM;
 340         }
 341
 342         rate = il_get_lowest_plcp(il,
 343                                 &il->ctx);
 344
 345         frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 346
 347         rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size,
 348                               &frame->u.cmd[0]);
 349
 350         il3945_free_frame(il, frame);
 351
 352         return rc;
 353 }
 354
 355 static void il3945_unset_hw_params(struct il_priv *il)
 356 {
 357         if (il->_3945.shared_virt)
 358                 dma_free_coherent(&il->pci_dev->dev,
 359                                   sizeof(struct il3945_shared),
 360                                   il->_3945.shared_virt,
 361                                   il->_3945.shared_phys);
 362 }
 363
 364 static void il3945_build_tx_cmd_hwcrypto(struct il_priv *il,
 365                                       struct ieee80211_tx_info *info,
 366                                       struct il_device_cmd *cmd,
 367                                       struct sk_buff *skb_frag,
 368                                       int sta_id)
 369 {
 370         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 371         struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 372
 373         tx_cmd->sec_ctl = 0;
 374
 375         switch (keyinfo->cipher) {
 376         case WLAN_CIPHER_SUITE_CCMP:
 377                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 378                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 379                 D_TX("tx_cmd with AES hwcrypto\n");
 380                 break;
 381
 382         case WLAN_CIPHER_SUITE_TKIP:
 383                 break;
 384
 385         case WLAN_CIPHER_SUITE_WEP104:
 386                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 387                 /* fall through */
 388         case WLAN_CIPHER_SUITE_WEP40:
 389                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 390                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 391
 392                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 393
 394                 D_TX("Configuring packet for WEP encryption "
 395                              "with key %d\n", info->control.hw_key->hw_key_idx);
 396                 break;
 397
 398         default:
 399                 IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
 400                 break;
 401         }
 402 }
 403
 404 /*
 405  * handle build C_TX command notification.
 406  */
 407 static void il3945_build_tx_cmd_basic(struct il_priv *il,
 408                                   struct il_device_cmd *cmd,
 409                                   struct ieee80211_tx_info *info,
 410                                   struct ieee80211_hdr *hdr, u8 std_id)
 411 {
 412         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 413         __le32 tx_flags = tx_cmd->tx_flags;
 414         __le16 fc = hdr->frame_control;
 415
 416         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 417         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 418                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 419                 if (ieee80211_is_mgmt(fc))
 420                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 421                 if (ieee80211_is_probe_resp(fc) &&
 422                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 423                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 424         } else {
 425                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 426                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 427         }
 428
 429         tx_cmd->sta_id = std_id;
 430         if (ieee80211_has_morefrags(fc))
 431                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 432
 433         if (ieee80211_is_data_qos(fc)) {
 434                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 435                 tx_cmd->tid_tspec = qc[0] & 0xf;
 436                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 437         } else {
 438                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 439         }
 440
 441         il_tx_cmd_protection(il, info, fc, &tx_flags);
 442
 443         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 444         if (ieee80211_is_mgmt(fc)) {
 445                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 447                 else
 448                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 449         } else {
 450                 tx_cmd->timeout.pm_frame_timeout = 0;
 451         }
 452
 453         tx_cmd->driver_txop = 0;
 454         tx_cmd->tx_flags = tx_flags;
 455         tx_cmd->next_frame_len = 0;
 456 }
 457
 458 /*
 459  * start C_TX command process
 460  */
 461 static int il3945_tx_skb(struct il_priv *il, struct sk_buff *skb)
 462 {
 463         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 464         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 465         struct il3945_tx_cmd *tx_cmd;
 466         struct il_tx_queue *txq = NULL;
 467         struct il_queue *q = NULL;
 468         struct il_device_cmd *out_cmd;
 469         struct il_cmd_meta *out_meta;
 470         dma_addr_t phys_addr;
 471         dma_addr_t txcmd_phys;
 472         int txq_id = skb_get_queue_mapping(skb);
 473         u16 len, idx, hdr_len;
 474         u8 id;
 475         u8 unicast;
 476         u8 sta_id;
 477         u8 tid = 0;
 478         __le16 fc;
 479         u8 wait_write_ptr = 0;
 480         unsigned long flags;
 481
 482         spin_lock_irqsave(&il->lock, flags);
 483         if (il_is_rfkill(il)) {
 484                 D_DROP("Dropping - RF KILL\n");
 485                 goto drop_unlock;
 486         }
 487
 488         if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) == IL_INVALID_RATE) {
 489                 IL_ERR("ERROR: No TX rate available.\n");
 490                 goto drop_unlock;
 491         }
 492
 493         unicast = !is_multicast_ether_addr(hdr->addr1);
 494         id = 0;
 495
 496         fc = hdr->frame_control;
 497
 498 #ifdef CONFIG_IWLEGACY_DEBUG
 499         if (ieee80211_is_auth(fc))
 500                 D_TX("Sending AUTH frame\n");
 501         else if (ieee80211_is_assoc_req(fc))
 502                 D_TX("Sending ASSOC frame\n");
 503         else if (ieee80211_is_reassoc_req(fc))
 504                 D_TX("Sending REASSOC frame\n");
 505 #endif
 506
 507         spin_unlock_irqrestore(&il->lock, flags);
 508
 509         hdr_len = ieee80211_hdrlen(fc);
 510
 511         /* Find idx into station table for destination station */
 512         sta_id = il_sta_id_or_broadcast(
 513                         il, &il->ctx,
 514                         info->control.sta);
 515         if (sta_id == IL_INVALID_STATION) {
 516                 D_DROP("Dropping - INVALID STATION: %pM\n",
 517                                hdr->addr1);
 518                 goto drop;
 519         }
 520
 521         D_RATE("station Id %d\n", sta_id);
 522
 523         if (ieee80211_is_data_qos(fc)) {
 524                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 525                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 526                 if (unlikely(tid >= MAX_TID_COUNT))
 527                         goto drop;
 528         }
 529
 530         /* Descriptor for chosen Tx queue */
 531         txq = &il->txq[txq_id];
 532         q = &txq->q;
 533
 534         if ((il_queue_space(q) < q->high_mark))
 535                 goto drop;
 536
 537         spin_lock_irqsave(&il->lock, flags);
 538
 539         idx = il_get_cmd_idx(q, q->write_ptr, 0);
 540
 541         /* Set up driver data for this TFD */
 542         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct il_tx_info));
 543         txq->txb[q->write_ptr].skb = skb;
 544         txq->txb[q->write_ptr].ctx = &il->ctx;
 545
 546         /* Init first empty entry in queue's array of Tx/cmd buffers */
 547         out_cmd = txq->cmd[idx];
 548         out_meta = &txq->meta[idx];
 549         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 550         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 551         memset(tx_cmd, 0, sizeof(*tx_cmd));
 552
 553         /*
 554          * Set up the Tx-command (not MAC!) header.
 555          * Store the chosen Tx queue and TFD idx within the sequence field;
 556          * after Tx, uCode's Tx response will return this value so driver can
 557          * locate the frame within the tx queue and do post-tx processing.
 558          */
 559         out_cmd->hdr.cmd = C_TX;
 560         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 561                                 IDX_TO_SEQ(q->write_ptr)));
 562
 563         /* Copy MAC header from skb into command buffer */
 564         memcpy(tx_cmd->hdr, hdr, hdr_len);
 565
 566
 567         if (info->control.hw_key)
 568                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 569
 570         /* TODO need this for burst mode later on */
 571         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 572
 573         /* set is_hcca to 0; it probably will never be implemented */
 574         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id, 0);
 575
 576         /* Total # bytes to be transmitted */
 577         len = (u16)skb->len;
 578         tx_cmd->len = cpu_to_le16(len);
 579
 580         il_dbg_log_tx_data_frame(il, len, hdr);
 581         il_update_stats(il, true, fc, len);
 582         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 583         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 584
 585         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 586                 txq->need_update = 1;
 587         } else {
 588                 wait_write_ptr = 1;
 589                 txq->need_update = 0;
 590         }
 591
 592         D_TX("sequence nr = 0X%x\n",
 593                      le16_to_cpu(out_cmd->hdr.sequence));
 594         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 595         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 596         il_print_hex_dump(il, IL_DL_TX, (u8 *)tx_cmd->hdr,
 597                            ieee80211_hdrlen(fc));
 598
 599         /*
 600          * Use the first empty entry in this queue's command buffer array
 601          * to contain the Tx command and MAC header concatenated together
 602          * (payload data will be in another buffer).
 603          * Size of this varies, due to varying MAC header length.
 604          * If end is not dword aligned, we'll have 2 extra bytes at the end
 605          * of the MAC header (device reads on dword boundaries).
 606          * We'll tell device about this padding later.
 607          */
 608         len = sizeof(struct il3945_tx_cmd) +
 609                         sizeof(struct il_cmd_header) + hdr_len;
 610         len = (len + 3) & ~3;
 611
 612         /* Physical address of this Tx command's header (not MAC header!),
 613          * within command buffer array. */
 614         txcmd_phys = pci_map_single(il->pci_dev, &out_cmd->hdr,
 615                                     len, PCI_DMA_TODEVICE);
 616         /* we do not map meta data ... so we can safely access address to
 617          * provide to unmap command*/
 618         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 619         dma_unmap_len_set(out_meta, len, len);
 620
 621         /* Add buffer containing Tx command and MAC(!) header to TFD's
 622          * first entry */
 623         il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
 624                                                    txcmd_phys, len, 1, 0);
 625
 626
 627         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 628          * if any (802.11 null frames have no payload). */
 629         len = skb->len - hdr_len;
 630         if (len) {
 631                 phys_addr = pci_map_single(il->pci_dev, skb->data + hdr_len,
 632                                            len, PCI_DMA_TODEVICE);
 633                 il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq,
 634                                                            phys_addr, len,
 635                                                            0, U32_PAD(len));
 636         }
 637
 638
 639         /* Tell device the write idx *just past* this latest filled TFD */
 640         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 641         il_txq_update_write_ptr(il, txq);
 642         spin_unlock_irqrestore(&il->lock, flags);
 643
 644         if (il_queue_space(q) < q->high_mark
 645             && il->mac80211_registered) {
 646                 if (wait_write_ptr) {
 647                         spin_lock_irqsave(&il->lock, flags);
 648                         txq->need_update = 1;
 649                         il_txq_update_write_ptr(il, txq);
 650                         spin_unlock_irqrestore(&il->lock, flags);
 651                 }
 652
 653                 il_stop_queue(il, txq);
 654         }
 655
 656         return 0;
 657
 658 drop_unlock:
 659         spin_unlock_irqrestore(&il->lock, flags);
 660 drop:
 661         return -1;
 662 }
 663
 664 static int il3945_get_measurement(struct il_priv *il,
 665                                struct ieee80211_measurement_params *params,
 666                                u8 type)
 667 {
 668         struct il_spectrum_cmd spectrum;
 669         struct il_rx_pkt *pkt;
 670         struct il_host_cmd cmd = {
 671                 .id = C_SPECTRUM_MEASUREMENT,
 672                 .data = (void *)&spectrum,
 673                 .flags = CMD_WANT_SKB,
 674         };
 675         u32 add_time = le64_to_cpu(params->start_time);
 676         int rc;
 677         int spectrum_resp_status;
 678         int duration = le16_to_cpu(params->duration);
 679         struct il_rxon_context *ctx = &il->ctx;
 680
 681         if (il_is_associated(il))
 682                 add_time = il_usecs_to_beacons(il,
 683                         le64_to_cpu(params->start_time) - il->_3945.last_tsf,
 684                         le16_to_cpu(ctx->timing.beacon_interval));
 685
 686         memset(&spectrum, 0, sizeof(spectrum));
 687
 688         spectrum.channel_count = cpu_to_le16(1);
 689         spectrum.flags =
 690             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 691         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 692         cmd.len = sizeof(spectrum);
 693         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 694
 695         if (il_is_associated(il))
 696                 spectrum.start_time =
 697                         il_add_beacon_time(il,
 698                                 il->_3945.last_beacon_time, add_time,
 699                                 le16_to_cpu(ctx->timing.beacon_interval));
 700         else
 701                 spectrum.start_time = 0;
 702
 703         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 704         spectrum.channels[0].channel = params->channel;
 705         spectrum.channels[0].type = type;
 706         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 707                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 708                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 709
 710         rc = il_send_cmd_sync(il, &cmd);
 711         if (rc)
 712                 return rc;
 713
 714         pkt = (struct il_rx_pkt *)cmd.reply_page;
 715         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 716                 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 717                 rc = -EIO;
 718         }
 719
 720         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 721         switch (spectrum_resp_status) {
 722         case 0:         /* Command will be handled */
 723                 if (pkt->u.spectrum.id != 0xff) {
 724                         D_INFO("Replaced existing measurement: %d\n",
 725                                                 pkt->u.spectrum.id);
 726                         il->measurement_status &= ~MEASUREMENT_READY;
 727                 }
 728                 il->measurement_status |= MEASUREMENT_ACTIVE;
 729                 rc = 0;
 730                 break;
 731
 732         case 1:         /* Command will not be handled */
 733                 rc = -EAGAIN;
 734                 break;
 735         }
 736
 737         il_free_pages(il, cmd.reply_page);
 738
 739         return rc;
 740 }
 741
 742 static void il3945_hdl_alive(struct il_priv *il,
 743                                struct il_rx_buf *rxb)
 744 {
 745         struct il_rx_pkt *pkt = rxb_addr(rxb);
 746         struct il_alive_resp *palive;
 747         struct delayed_work *pwork;
 748
 749         palive = &pkt->u.alive_frame;
 750
 751         D_INFO("Alive ucode status 0x%08X revision "
 752                        "0x%01X 0x%01X\n",
 753                        palive->is_valid, palive->ver_type,
 754                        palive->ver_subtype);
 755
 756         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 757                 D_INFO("Initialization Alive received.\n");
 758                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 759                        sizeof(struct il_alive_resp));
 760                 pwork = &il->init_alive_start;
 761         } else {
 762                 D_INFO("Runtime Alive received.\n");
 763                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 764                        sizeof(struct il_alive_resp));
 765                 pwork = &il->alive_start;
 766                 il3945_disable_events(il);
 767         }
 768
 769         /* We delay the ALIVE response by 5ms to
 770          * give the HW RF Kill time to activate... */
 771         if (palive->is_valid == UCODE_VALID_OK)
 772                 queue_delayed_work(il->workqueue, pwork,
 773                                    msecs_to_jiffies(5));
 774         else
 775                 IL_WARN("uCode did not respond OK.\n");
 776 }
 777
 778 static void il3945_hdl_add_sta(struct il_priv *il,
 779                                  struct il_rx_buf *rxb)
 780 {
 781 #ifdef CONFIG_IWLEGACY_DEBUG
 782         struct il_rx_pkt *pkt = rxb_addr(rxb);
 783 #endif
 784
 785         D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 786 }
 787
 788 static void il3945_hdl_beacon(struct il_priv *il,
 789                                 struct il_rx_buf *rxb)
 790 {
 791         struct il_rx_pkt *pkt = rxb_addr(rxb);
 792         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 793 #ifdef CONFIG_IWLEGACY_DEBUG
 794         u8 rate = beacon->beacon_notify_hdr.rate;
 795
 796         D_RX("beacon status %x retries %d iss %d "
 797                 "tsf %d %d rate %d\n",
 798                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 799                 beacon->beacon_notify_hdr.failure_frame,
 800                 le32_to_cpu(beacon->ibss_mgr_status),
 801                 le32_to_cpu(beacon->high_tsf),
 802                 le32_to_cpu(beacon->low_tsf), rate);
 803 #endif
 804
 805         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 806
 807 }
 808
 809 /* Handle notification from uCode that card's power state is changing
 810  * due to software, hardware, or critical temperature RFKILL */
 811 static void il3945_hdl_card_state(struct il_priv *il,
 812                                     struct il_rx_buf *rxb)
 813 {
 814         struct il_rx_pkt *pkt = rxb_addr(rxb);
 815         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 816         unsigned long status = il->status;
 817
 818         IL_WARN("Card state received: HW:%s SW:%s\n",
 819                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 820                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 821
 822         _il_wr(il, CSR_UCODE_DRV_GP1_SET,
 823                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 824
 825         if (flags & HW_CARD_DISABLED)
 826                 set_bit(S_RF_KILL_HW, &il->status);
 827         else
 828                 clear_bit(S_RF_KILL_HW, &il->status);
 829
 830
 831         il_scan_cancel(il);
 832
 833         if ((test_bit(S_RF_KILL_HW, &status) !=
 834              test_bit(S_RF_KILL_HW, &il->status)))
 835                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 836                                 test_bit(S_RF_KILL_HW, &il->status));
 837         else
 838                 wake_up(&il->wait_command_queue);
 839 }
 840
 841 /**
 842  * il3945_setup_handlers - Initialize Rx handler callbacks
 843  *
 844  * Setup the RX handlers for each of the reply types sent from the uCode
 845  * to the host.
 846  *
 847  * This function chains into the hardware specific files for them to setup
 848  * any hardware specific handlers as well.
 849  */
 850 static void il3945_setup_handlers(struct il_priv *il)
 851 {
 852         il->handlers[N_ALIVE] = il3945_hdl_alive;
 853         il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 854         il->handlers[N_ERROR] = il_hdl_error;
 855         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 856         il->handlers[N_SPECTRUM_MEASUREMENT] =
 857                         il_hdl_spectrum_measurement;
 858         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 859         il->handlers[N_PM_DEBUG_STATS] =
 860             il_hdl_pm_debug_stats;
 861         il->handlers[N_BEACON] = il3945_hdl_beacon;
 862
 863         /*
 864          * The same handler is used for both the REPLY to a discrete
 865          * stats request from the host as well as for the periodic
 866          * stats notifications (after received beacons) from the uCode.
 867          */
 868         il->handlers[C_STATS] = il3945_hdl_c_stats;
 869         il->handlers[N_STATS] = il3945_hdl_stats;
 870
 871         il_setup_rx_scan_handlers(il);
 872         il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 873
 874         /* Set up hardware specific Rx handlers */
 875         il3945_hw_handler_setup(il);
 876 }
 877
 878 /************************** RX-FUNCTIONS ****************************/
 879 /*
 880  * Rx theory of operation
 881  *
 882  * The host allocates 32 DMA target addresses and passes the host address
 883  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 884  * 0 to 31
 885  *
 886  * Rx Queue Indexes
 887  * The host/firmware share two idx registers for managing the Rx buffers.
 888  *
 889  * The READ idx maps to the first position that the firmware may be writing
 890  * to -- the driver can read up to (but not including) this position and get
 891  * good data.
 892  * The READ idx is managed by the firmware once the card is enabled.
 893  *
 894  * The WRITE idx maps to the last position the driver has read from -- the
 895  * position preceding WRITE is the last slot the firmware can place a packet.
 896  *
 897  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 898  * WRITE = READ.
 899  *
 900  * During initialization, the host sets up the READ queue position to the first
 901  * IDX position, and WRITE to the last (READ - 1 wrapped)
 902  *
 903  * When the firmware places a packet in a buffer, it will advance the READ idx
 904  * and fire the RX interrupt.  The driver can then query the READ idx and
 905  * process as many packets as possible, moving the WRITE idx forward as it
 906  * resets the Rx queue buffers with new memory.
 907  *
 908  * The management in the driver is as follows:
 909  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 910  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 911  *   to replenish the iwl->rxq->rx_free.
 912  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 913  *   iwl->rxq is replenished and the READ IDX is updated (updating the
 914  *   'processed' and 'read' driver idxes as well)
 915  * + A received packet is processed and handed to the kernel network stack,
 916  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 917  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 918  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 919  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 920  *   were enough free buffers and RX_STALLED is set it is cleared.
 921  *
 922  *
 923  * Driver sequence:
 924  *
 925  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 926  *                            il3945_rx_queue_restock
 927  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 928  *                            queue, updates firmware pointers, and updates
 929  *                            the WRITE idx.  If insufficient rx_free buffers
 930  *                            are available, schedules il3945_rx_replenish
 931  *
 932  * -- enable interrupts --
 933  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 934  *                            READ IDX, detaching the SKB from the pool.
 935  *                            Moves the packet buffer from queue to rx_used.
 936  *                            Calls il3945_rx_queue_restock to refill any empty
 937  *                            slots.
 938  * ...
 939  *
 940  */
 941
 942 /**
 943  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 944  */
 945 static inline __le32 il3945_dma_addr2rbd_ptr(struct il_priv *il,
 946                                           dma_addr_t dma_addr)
 947 {
 948         return cpu_to_le32((u32)dma_addr);
 949 }
 950
 951 /**
 952  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 953  *
 954  * If there are slots in the RX queue that need to be restocked,
 955  * and we have free pre-allocated buffers, fill the ranks as much
 956  * as we can, pulling from rx_free.
 957  *
 958  * This moves the 'write' idx forward to catch up with 'processed', and
 959  * also updates the memory address in the firmware to reference the new
 960  * target buffer.
 961  */
 962 static void il3945_rx_queue_restock(struct il_priv *il)
 963 {
 964         struct il_rx_queue *rxq = &il->rxq;
 965         struct list_head *element;
 966         struct il_rx_buf *rxb;
 967         unsigned long flags;
 968         int write;
 969
 970         spin_lock_irqsave(&rxq->lock, flags);
 971         write = rxq->write & ~0x7;
 972         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 973                 /* Get next free Rx buffer, remove from free list */
 974                 element = rxq->rx_free.next;
 975                 rxb = list_entry(element, struct il_rx_buf, list);
 976                 list_del(element);
 977
 978                 /* Point to Rx buffer via next RBD in circular buffer */
 979                 rxq->bd[rxq->write] = il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 980                 rxq->queue[rxq->write] = rxb;
 981                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 982                 rxq->free_count--;
 983         }
 984         spin_unlock_irqrestore(&rxq->lock, flags);
 985         /* If the pre-allocated buffer pool is dropping low, schedule to
 986          * refill it */
 987         if (rxq->free_count <= RX_LOW_WATERMARK)
 988                 queue_work(il->workqueue, &il->rx_replenish);
 989
 990
 991         /* If we've added more space for the firmware to place data, tell it.
 992          * Increment device's write pointer in multiples of 8. */
 993         if (rxq->write_actual != (rxq->write & ~0x7) ||
 994             abs(rxq->write - rxq->read) > 7) {
 995                 spin_lock_irqsave(&rxq->lock, flags);
 996                 rxq->need_update = 1;
 997                 spin_unlock_irqrestore(&rxq->lock, flags);
 998                 il_rx_queue_update_write_ptr(il, rxq);
 999         }
1000 }
1001
1002 /**
1003  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
1004  *
1005  * When moving to rx_free an SKB is allocated for the slot.
1006  *
1007  * Also restock the Rx queue via il3945_rx_queue_restock.
1008  * This is called as a scheduled work item (except for during initialization)
1009  */
1010 static void il3945_rx_allocate(struct il_priv *il, gfp_t priority)
1011 {
1012         struct il_rx_queue *rxq = &il->rxq;
1013         struct list_head *element;
1014         struct il_rx_buf *rxb;
1015         struct page *page;
1016         unsigned long flags;
1017         gfp_t gfp_mask = priority;
1018
1019         while (1) {
1020                 spin_lock_irqsave(&rxq->lock, flags);
1021
1022                 if (list_empty(&rxq->rx_used)) {
1023                         spin_unlock_irqrestore(&rxq->lock, flags);
1024                         return;
1025                 }
1026                 spin_unlock_irqrestore(&rxq->lock, flags);
1027
1028                 if (rxq->free_count > RX_LOW_WATERMARK)
1029                         gfp_mask |= __GFP_NOWARN;
1030
1031                 if (il->hw_params.rx_page_order > 0)
1032                         gfp_mask |= __GFP_COMP;
1033
1034                 /* Alloc a new receive buffer */
1035                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1036                 if (!page) {
1037                         if (net_ratelimit())
1038                                 D_INFO("Failed to allocate SKB buffer.\n");
1039                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1040                             net_ratelimit())
1041                                 IL_ERR("Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1042                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1043                                          rxq->free_count);
1044                         /* We don't reschedule replenish work here -- we will
1045                          * call the restock method and if it still needs
1046                          * more buffers it will schedule replenish */
1047                         break;
1048                 }
1049
1050                 spin_lock_irqsave(&rxq->lock, flags);
1051                 if (list_empty(&rxq->rx_used)) {
1052                         spin_unlock_irqrestore(&rxq->lock, flags);
1053                         __free_pages(page, il->hw_params.rx_page_order);
1054                         return;
1055                 }
1056                 element = rxq->rx_used.next;
1057                 rxb = list_entry(element, struct il_rx_buf, list);
1058                 list_del(element);
1059                 spin_unlock_irqrestore(&rxq->lock, flags);
1060
1061                 rxb->page = page;
1062                 /* Get physical address of RB/SKB */
1063                 rxb->page_dma = pci_map_page(il->pci_dev, page, 0,
1064                                 PAGE_SIZE << il->hw_params.rx_page_order,
1065                                 PCI_DMA_FROMDEVICE);
1066
1067                 spin_lock_irqsave(&rxq->lock, flags);
1068
1069                 list_add_tail(&rxb->list, &rxq->rx_free);
1070                 rxq->free_count++;
1071                 il->alloc_rxb_page++;
1072
1073                 spin_unlock_irqrestore(&rxq->lock, flags);
1074         }
1075 }
1076
1077 void il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1078 {
1079         unsigned long flags;
1080         int i;
1081         spin_lock_irqsave(&rxq->lock, flags);
1082         INIT_LIST_HEAD(&rxq->rx_free);
1083         INIT_LIST_HEAD(&rxq->rx_used);
1084         /* Fill the rx_used queue with _all_ of the Rx buffers */
1085         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1086                 /* In the reset function, these buffers may have been allocated
1087                  * to an SKB, so we need to unmap and free potential storage */
1088                 if (rxq->pool[i].page != NULL) {
1089                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1090                                 PAGE_SIZE << il->hw_params.rx_page_order,
1091                                 PCI_DMA_FROMDEVICE);
1092                         __il_free_pages(il, rxq->pool[i].page);
1093                         rxq->pool[i].page = NULL;
1094                 }
1095                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1096         }
1097
1098         /* Set us so that we have processed and used all buffers, but have
1099          * not restocked the Rx queue with fresh buffers */
1100         rxq->read = rxq->write = 0;
1101         rxq->write_actual = 0;
1102         rxq->free_count = 0;
1103         spin_unlock_irqrestore(&rxq->lock, flags);
1104 }
1105
1106 void il3945_rx_replenish(void *data)
1107 {
1108         struct il_priv *il = data;
1109         unsigned long flags;
1110
1111         il3945_rx_allocate(il, GFP_KERNEL);
1112
1113         spin_lock_irqsave(&il->lock, flags);
1114         il3945_rx_queue_restock(il);
1115         spin_unlock_irqrestore(&il->lock, flags);
1116 }
1117
1118 static void il3945_rx_replenish_now(struct il_priv *il)
1119 {
1120         il3945_rx_allocate(il, GFP_ATOMIC);
1121
1122         il3945_rx_queue_restock(il);
1123 }
1124
1125
1126 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1127  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1128  * This free routine walks the list of POOL entries and if SKB is set to
1129  * non NULL it is unmapped and freed
1130  */
1131 static void il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1132 {
1133         int i;
1134         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1135                 if (rxq->pool[i].page != NULL) {
1136                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1137                                 PAGE_SIZE << il->hw_params.rx_page_order,
1138                                 PCI_DMA_FROMDEVICE);
1139                         __il_free_pages(il, rxq->pool[i].page);
1140                         rxq->pool[i].page = NULL;
1141                 }
1142         }
1143
1144         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1145                           rxq->bd_dma);
1146         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1147                           rxq->rb_stts, rxq->rb_stts_dma);
1148         rxq->bd = NULL;
1149         rxq->rb_stts  = NULL;
1150 }
1151
1152
1153 /* Convert linear signal-to-noise ratio into dB */
1154 static u8 ratio2dB[100] = {
1155 /*       0   1   2   3   4   5   6   7   8   9 */
1156          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1157         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1158         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1159         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1160         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1161         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1162         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1163         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1164         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1165         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1166 };
1167
1168 /* Calculates a relative dB value from a ratio of linear
1169  *   (i.e. not dB) signal levels.
1170  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1171 int il3945_calc_db_from_ratio(int sig_ratio)
1172 {
1173         /* 1000:1 or higher just report as 60 dB */
1174         if (sig_ratio >= 1000)
1175                 return 60;
1176
1177         /* 100:1 or higher, divide by 10 and use table,
1178          *   add 20 dB to make up for divide by 10 */
1179         if (sig_ratio >= 100)
1180                 return 20 + (int)ratio2dB[sig_ratio/10];
1181
1182         /* We shouldn't see this */
1183         if (sig_ratio < 1)
1184                 return 0;
1185
1186         /* Use table for ratios 1:1 - 99:1 */
1187         return (int)ratio2dB[sig_ratio];
1188 }
1189
1190 /**
1191  * il3945_rx_handle - Main entry function for receiving responses from uCode
1192  *
1193  * Uses the il->handlers callback function array to invoke
1194  * the appropriate handlers, including command responses,
1195  * frame-received notifications, and other notifications.
1196  */
1197 static void il3945_rx_handle(struct il_priv *il)
1198 {
1199         struct il_rx_buf *rxb;
1200         struct il_rx_pkt *pkt;
1201         struct il_rx_queue *rxq = &il->rxq;
1202         u32 r, i;
1203         int reclaim;
1204         unsigned long flags;
1205         u8 fill_rx = 0;
1206         u32 count = 8;
1207         int total_empty = 0;
1208
1209         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1210          * buffer that the driver may process (last buffer filled by ucode). */
1211         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1212         i = rxq->read;
1213
1214         /* calculate total frames need to be restock after handling RX */
1215         total_empty = r - rxq->write_actual;
1216         if (total_empty < 0)
1217                 total_empty += RX_QUEUE_SIZE;
1218
1219         if (total_empty > (RX_QUEUE_SIZE / 2))
1220                 fill_rx = 1;
1221         /* Rx interrupt, but nothing sent from uCode */
1222         if (i == r)
1223                 D_RX("r = %d, i = %d\n", r, i);
1224
1225         while (i != r) {
1226                 int len;
1227
1228                 rxb = rxq->queue[i];
1229
1230                 /* If an RXB doesn't have a Rx queue slot associated with it,
1231                  * then a bug has been introduced in the queue refilling
1232                  * routines -- catch it here */
1233                 BUG_ON(rxb == NULL);
1234
1235                 rxq->queue[i] = NULL;
1236
1237                 pci_unmap_page(il->pci_dev, rxb->page_dma,
1238                                PAGE_SIZE << il->hw_params.rx_page_order,
1239                                PCI_DMA_FROMDEVICE);
1240                 pkt = rxb_addr(rxb);
1241
1242                 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
1243                 len += sizeof(u32); /* account for status word */
1244
1245                 /* Reclaim a command buffer only if this packet is a response
1246                  *   to a (driver-originated) command.
1247                  * If the packet (e.g. Rx frame) originated from uCode,
1248                  *   there is no command buffer to reclaim.
1249                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1250                  *   but apparently a few don't get set; catch them here. */
1251                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1252                         pkt->hdr.cmd != N_STATS &&
1253                         pkt->hdr.cmd != C_TX;
1254
1255                 /* Based on type of command response or notification,
1256                  *   handle those that need handling via function in
1257                  *   handlers table.  See il3945_setup_handlers() */
1258                 if (il->handlers[pkt->hdr.cmd]) {
1259                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1260                         il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1261                         il->isr_stats.handlers[pkt->hdr.cmd]++;
1262                         il->handlers[pkt->hdr.cmd] (il, rxb);
1263                 } else {
1264                         /* No handling needed */
1265                         D_RX(
1266                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1267                                 r, i, il_get_cmd_string(pkt->hdr.cmd),
1268                                 pkt->hdr.cmd);
1269                 }
1270
1271                 /*
1272                  * XXX: After here, we should always check rxb->page
1273                  * against NULL before touching it or its virtual
1274                  * memory (pkt). Because some handler might have
1275                  * already taken or freed the pages.
1276                  */
1277
1278                 if (reclaim) {
1279                         /* Invoke any callbacks, transfer the buffer to caller,
1280                          * and fire off the (possibly) blocking il_send_cmd()
1281                          * as we reclaim the driver command queue */
1282                         if (rxb->page)
1283                                 il_tx_cmd_complete(il, rxb);
1284                         else
1285                                 IL_WARN("Claim null rxb?\n");
1286                 }
1287
1288                 /* Reuse the page if possible. For notification packets and
1289                  * SKBs that fail to Rx correctly, add them back into the
1290                  * rx_free list for reuse later. */
1291                 spin_lock_irqsave(&rxq->lock, flags);
1292                 if (rxb->page != NULL) {
1293                         rxb->page_dma = pci_map_page(il->pci_dev, rxb->page,
1294                                 0, PAGE_SIZE << il->hw_params.rx_page_order,
1295                                 PCI_DMA_FROMDEVICE);
1296                         list_add_tail(&rxb->list, &rxq->rx_free);
1297                         rxq->free_count++;
1298                 } else
1299                         list_add_tail(&rxb->list, &rxq->rx_used);
1300
1301                 spin_unlock_irqrestore(&rxq->lock, flags);
1302
1303                 i = (i + 1) & RX_QUEUE_MASK;
1304                 /* If there are a lot of unused frames,
1305                  * restock the Rx queue so ucode won't assert. */
1306                 if (fill_rx) {
1307                         count++;
1308                         if (count >= 8) {
1309                                 rxq->read = i;
1310                                 il3945_rx_replenish_now(il);
1311                                 count = 0;
1312                         }
1313                 }
1314         }
1315
1316         /* Backtrack one entry */
1317         rxq->read = i;
1318         if (fill_rx)
1319                 il3945_rx_replenish_now(il);
1320         else
1321                 il3945_rx_queue_restock(il);
1322 }
1323
1324 /* call this function to flush any scheduled tasklet */
1325 static inline void il3945_synchronize_irq(struct il_priv *il)
1326 {
1327         /* wait to make sure we flush pending tasklet*/
1328         synchronize_irq(il->pci_dev->irq);
1329         tasklet_kill(&il->irq_tasklet);
1330 }
1331
1332 static const char *il3945_desc_lookup(int i)
1333 {
1334         switch (i) {
1335         case 1:
1336                 return "FAIL";
1337         case 2:
1338                 return "BAD_PARAM";
1339         case 3:
1340                 return "BAD_CHECKSUM";
1341         case 4:
1342                 return "NMI_INTERRUPT";
1343         case 5:
1344                 return "SYSASSERT";
1345         case 6:
1346                 return "FATAL_ERROR";
1347         }
1348
1349         return "UNKNOWN";
1350 }
1351
1352 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1353 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1354
1355 void il3945_dump_nic_error_log(struct il_priv *il)
1356 {
1357         u32 i;
1358         u32 desc, time, count, base, data1;
1359         u32 blink1, blink2, ilink1, ilink2;
1360
1361         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1362
1363         if (!il3945_hw_valid_rtc_data_addr(base)) {
1364                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1365                 return;
1366         }
1367
1368
1369         count = il_read_targ_mem(il, base);
1370
1371         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1372                 IL_ERR("Start IWL Error Log Dump:\n");
1373                 IL_ERR("Status: 0x%08lX, count: %d\n",
1374                         il->status, count);
1375         }
1376
1377         IL_ERR("Desc       Time       asrtPC  blink2 "
1378                   "ilink1  nmiPC   Line\n");
1379         for (i = ERROR_START_OFFSET;
1380              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1381              i += ERROR_ELEM_SIZE) {
1382                 desc = il_read_targ_mem(il, base + i);
1383                 time =
1384                     il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1385                 blink1 =
1386                     il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1387                 blink2 =
1388                     il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1389                 ilink1 =
1390                     il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1391                 ilink2 =
1392                     il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1393                 data1 =
1394                     il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1395
1396                 IL_ERR(
1397                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1398                         il3945_desc_lookup(desc), desc, time, blink1, blink2,
1399                         ilink1, ilink2, data1);
1400         }
1401 }
1402
1403 static void il3945_irq_tasklet(struct il_priv *il)
1404 {
1405         u32 inta, handled = 0;
1406         u32 inta_fh;
1407         unsigned long flags;
1408 #ifdef CONFIG_IWLEGACY_DEBUG
1409         u32 inta_mask;
1410 #endif
1411
1412         spin_lock_irqsave(&il->lock, flags);
1413
1414         /* Ack/clear/reset pending uCode interrupts.
1415          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1416          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1417         inta = _il_rd(il, CSR_INT);
1418         _il_wr(il, CSR_INT, inta);
1419
1420         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1421          * Any new interrupts that happen after this, either while we're
1422          * in this tasklet, or later, will show up in next ISR/tasklet. */
1423         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1424         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1425
1426 #ifdef CONFIG_IWLEGACY_DEBUG
1427         if (il_get_debug_level(il) & IL_DL_ISR) {
1428                 /* just for debug */
1429                 inta_mask = _il_rd(il, CSR_INT_MASK);
1430                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1431                               inta, inta_mask, inta_fh);
1432         }
1433 #endif
1434
1435         spin_unlock_irqrestore(&il->lock, flags);
1436
1437         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1438          * atomic, make sure that inta covers all the interrupts that
1439          * we've discovered, even if FH interrupt came in just after
1440          * reading CSR_INT. */
1441         if (inta_fh & CSR39_FH_INT_RX_MASK)
1442                 inta |= CSR_INT_BIT_FH_RX;
1443         if (inta_fh & CSR39_FH_INT_TX_MASK)
1444                 inta |= CSR_INT_BIT_FH_TX;
1445
1446         /* Now service all interrupt bits discovered above. */
1447         if (inta & CSR_INT_BIT_HW_ERR) {
1448                 IL_ERR("Hardware error detected.  Restarting.\n");
1449
1450                 /* Tell the device to stop sending interrupts */
1451                 il_disable_interrupts(il);
1452
1453                 il->isr_stats.hw++;
1454                 il_irq_handle_error(il);
1455
1456                 handled |= CSR_INT_BIT_HW_ERR;
1457
1458                 return;
1459         }
1460
1461 #ifdef CONFIG_IWLEGACY_DEBUG
1462         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1463                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1464                 if (inta & CSR_INT_BIT_SCD) {
1465                         D_ISR("Scheduler finished to transmit "
1466                                       "the frame/frames.\n");
1467                         il->isr_stats.sch++;
1468                 }
1469
1470                 /* Alive notification via Rx interrupt will do the real work */
1471                 if (inta & CSR_INT_BIT_ALIVE) {
1472                         D_ISR("Alive interrupt\n");
1473                         il->isr_stats.alive++;
1474                 }
1475         }
1476 #endif
1477         /* Safely ignore these bits for debug checks below */
1478         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1479
1480         /* Error detected by uCode */
1481         if (inta & CSR_INT_BIT_SW_ERR) {
1482                 IL_ERR("Microcode SW error detected. "
1483                         "Restarting 0x%X.\n", inta);
1484                 il->isr_stats.sw++;
1485                 il_irq_handle_error(il);
1486                 handled |= CSR_INT_BIT_SW_ERR;
1487         }
1488
1489         /* uCode wakes up after power-down sleep */
1490         if (inta & CSR_INT_BIT_WAKEUP) {
1491                 D_ISR("Wakeup interrupt\n");
1492                 il_rx_queue_update_write_ptr(il, &il->rxq);
1493                 il_txq_update_write_ptr(il, &il->txq[0]);
1494                 il_txq_update_write_ptr(il, &il->txq[1]);
1495                 il_txq_update_write_ptr(il, &il->txq[2]);
1496                 il_txq_update_write_ptr(il, &il->txq[3]);
1497                 il_txq_update_write_ptr(il, &il->txq[4]);
1498                 il_txq_update_write_ptr(il, &il->txq[5]);
1499
1500                 il->isr_stats.wakeup++;
1501                 handled |= CSR_INT_BIT_WAKEUP;
1502         }
1503
1504         /* All uCode command responses, including Tx command responses,
1505          * Rx "responses" (frame-received notification), and other
1506          * notifications from uCode come through here*/
1507         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1508                 il3945_rx_handle(il);
1509                 il->isr_stats.rx++;
1510                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1511         }
1512
1513         if (inta & CSR_INT_BIT_FH_TX) {
1514                 D_ISR("Tx interrupt\n");
1515                 il->isr_stats.tx++;
1516
1517                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1518                 il_wr(il, FH39_TCSR_CREDIT
1519                                         (FH39_SRVC_CHNL), 0x0);
1520                 handled |= CSR_INT_BIT_FH_TX;
1521         }
1522
1523         if (inta & ~handled) {
1524                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1525                 il->isr_stats.unhandled++;
1526         }
1527
1528         if (inta & ~il->inta_mask) {
1529                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1530                          inta & ~il->inta_mask);
1531                 IL_WARN("   with FH_INT = 0x%08x\n", inta_fh);
1532         }
1533
1534         /* Re-enable all interrupts */
1535         /* only Re-enable if disabled by irq */
1536         if (test_bit(S_INT_ENABLED, &il->status))
1537                 il_enable_interrupts(il);
1538
1539 #ifdef CONFIG_IWLEGACY_DEBUG
1540         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1541                 inta = _il_rd(il, CSR_INT);
1542                 inta_mask = _il_rd(il, CSR_INT_MASK);
1543                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1544                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1545                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1546         }
1547 #endif
1548 }
1549
1550 static int il3945_get_channels_for_scan(struct il_priv *il,
1551                                          enum ieee80211_band band,
1552                                      u8 is_active, u8 n_probes,
1553                                      struct il3945_scan_channel *scan_ch,
1554                                      struct ieee80211_vif *vif)
1555 {
1556         struct ieee80211_channel *chan;
1557         const struct ieee80211_supported_band *sband;
1558         const struct il_channel_info *ch_info;
1559         u16 passive_dwell = 0;
1560         u16 active_dwell = 0;
1561         int added, i;
1562
1563         sband = il_get_hw_mode(il, band);
1564         if (!sband)
1565                 return 0;
1566
1567         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1568         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1569
1570         if (passive_dwell <= active_dwell)
1571                 passive_dwell = active_dwell + 1;
1572
1573         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1574                 chan = il->scan_request->channels[i];
1575
1576                 if (chan->band != band)
1577                         continue;
1578
1579                 scan_ch->channel = chan->hw_value;
1580
1581                 ch_info = il_get_channel_info(il, band,
1582                                                         scan_ch->channel);
1583                 if (!il_is_channel_valid(ch_info)) {
1584                         D_SCAN(
1585                                 "Channel %d is INVALID for this band.\n",
1586                                scan_ch->channel);
1587                         continue;
1588                 }
1589
1590                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1591                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1592                 /* If passive , set up for auto-switch
1593                  *  and use long active_dwell time.
1594                  */
1595                 if (!is_active || il_is_channel_passive(ch_info) ||
1596                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1597                         scan_ch->type = 0;      /* passive */
1598                         if (IL_UCODE_API(il->ucode_ver) == 1)
1599                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1600                 } else {
1601                         scan_ch->type = 1;      /* active */
1602                 }
1603
1604                 /* Set direct probe bits. These may be used both for active
1605                  * scan channels (probes gets sent right away),
1606                  * or for passive channels (probes get se sent only after
1607                  * hearing clear Rx packet).*/
1608                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1609                         if (n_probes)
1610                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1611                 } else {
1612                         /* uCode v1 does not allow setting direct probe bits on
1613                          * passive channel. */
1614                         if ((scan_ch->type & 1) && n_probes)
1615                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1616                 }
1617
1618                 /* Set txpower levels to defaults */
1619                 scan_ch->tpc.dsp_atten = 110;
1620                 /* scan_pwr_info->tpc.dsp_atten; */
1621
1622                 /*scan_pwr_info->tpc.tx_gain; */
1623                 if (band == IEEE80211_BAND_5GHZ)
1624                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1625                 else {
1626                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1627                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1628                          * power level:
1629                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1630                          */
1631                 }
1632
1633                 D_SCAN("Scanning %d [%s %d]\n",
1634                                scan_ch->channel,
1635                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1636                                (scan_ch->type & 1) ?
1637                                active_dwell : passive_dwell);
1638
1639                 scan_ch++;
1640                 added++;
1641         }
1642
1643         D_SCAN("total channels to scan %d\n", added);
1644         return added;
1645 }
1646
1647 static void il3945_init_hw_rates(struct il_priv *il,
1648                               struct ieee80211_rate *rates)
1649 {
1650         int i;
1651
1652         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1653                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1654                 rates[i].hw_value = i; /* Rate scaling will work on idxes */
1655                 rates[i].hw_value_short = i;
1656                 rates[i].flags = 0;
1657                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1658                         /*
1659                          * If CCK != 1M then set short preamble rate flag.
1660                          */
1661                         rates[i].flags |= (il3945_rates[i].plcp == 10) ?
1662                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1663                 }
1664         }
1665 }
1666
1667 /******************************************************************************
1668  *
1669  * uCode download functions
1670  *
1671  ******************************************************************************/
1672
1673 static void il3945_dealloc_ucode_pci(struct il_priv *il)
1674 {
1675         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1676         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1677         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1678         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1679         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1680         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1681 }
1682
1683 /**
1684  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1685  *     looking at all data.
1686  */
1687 static int il3945_verify_inst_full(struct il_priv *il, __le32 *image, u32 len)
1688 {
1689         u32 val;
1690         u32 save_len = len;
1691         int rc = 0;
1692         u32 errcnt;
1693
1694         D_INFO("ucode inst image size is %u\n", len);
1695
1696         il_wr(il, HBUS_TARG_MEM_RADDR,
1697                                IL39_RTC_INST_LOWER_BOUND);
1698
1699         errcnt = 0;
1700         for (; len > 0; len -= sizeof(u32), image++) {
1701                 /* read data comes through single port, auto-incr addr */
1702                 /* NOTE: Use the debugless read so we don't flood kernel log
1703                  * if IL_DL_IO is set */
1704                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1705                 if (val != le32_to_cpu(*image)) {
1706                         IL_ERR("uCode INST section is invalid at "
1707                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1708                                   save_len - len, val, le32_to_cpu(*image));
1709                         rc = -EIO;
1710                         errcnt++;
1711                         if (errcnt >= 20)
1712                                 break;
1713                 }
1714         }
1715
1716
1717         if (!errcnt)
1718                 D_INFO(
1719                         "ucode image in INSTRUCTION memory is good\n");
1720
1721         return rc;
1722 }
1723
1724
1725 /**
1726  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1727  *   using sample data 100 bytes apart.  If these sample points are good,
1728  *   it's a pretty good bet that everything between them is good, too.
1729  */
1730 static int il3945_verify_inst_sparse(struct il_priv *il, __le32 *image, u32 len)
1731 {
1732         u32 val;
1733         int rc = 0;
1734         u32 errcnt = 0;
1735         u32 i;
1736
1737         D_INFO("ucode inst image size is %u\n", len);
1738
1739         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1740                 /* read data comes through single port, auto-incr addr */
1741                 /* NOTE: Use the debugless read so we don't flood kernel log
1742                  * if IL_DL_IO is set */
1743                 il_wr(il, HBUS_TARG_MEM_RADDR,
1744                         i + IL39_RTC_INST_LOWER_BOUND);
1745                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1746                 if (val != le32_to_cpu(*image)) {
1747 #if 0 /* Enable this if you want to see details */
1748                         IL_ERR("uCode INST section is invalid at "
1749                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1750                                   i, val, *image);
1751 #endif
1752                         rc = -EIO;
1753                         errcnt++;
1754                         if (errcnt >= 3)
1755                                 break;
1756                 }
1757         }
1758
1759         return rc;
1760 }
1761
1762
1763 /**
1764  * il3945_verify_ucode - determine which instruction image is in SRAM,
1765  *    and verify its contents
1766  */
1767 static int il3945_verify_ucode(struct il_priv *il)
1768 {
1769         __le32 *image;
1770         u32 len;
1771         int rc = 0;
1772
1773         /* Try bootstrap */
1774         image = (__le32 *)il->ucode_boot.v_addr;
1775         len = il->ucode_boot.len;
1776         rc = il3945_verify_inst_sparse(il, image, len);
1777         if (rc == 0) {
1778                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1779                 return 0;
1780         }
1781
1782         /* Try initialize */
1783         image = (__le32 *)il->ucode_init.v_addr;
1784         len = il->ucode_init.len;
1785         rc = il3945_verify_inst_sparse(il, image, len);
1786         if (rc == 0) {
1787                 D_INFO("Initialize uCode is good in inst SRAM\n");
1788                 return 0;
1789         }
1790
1791         /* Try runtime/protocol */
1792         image = (__le32 *)il->ucode_code.v_addr;
1793         len = il->ucode_code.len;
1794         rc = il3945_verify_inst_sparse(il, image, len);
1795         if (rc == 0) {
1796                 D_INFO("Runtime uCode is good in inst SRAM\n");
1797                 return 0;
1798         }
1799
1800         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1801
1802         /* Since nothing seems to match, show first several data entries in
1803          * instruction SRAM, so maybe visual inspection will give a clue.
1804          * Selection of bootstrap image (vs. other images) is arbitrary. */
1805         image = (__le32 *)il->ucode_boot.v_addr;
1806         len = il->ucode_boot.len;
1807         rc = il3945_verify_inst_full(il, image, len);
1808
1809         return rc;
1810 }
1811
1812 static void il3945_nic_start(struct il_priv *il)
1813 {
1814         /* Remove all resets to allow NIC to operate */
1815         _il_wr(il, CSR_RESET, 0);
1816 }
1817
1818 #define IL3945_UCODE_GET(item)                                          \
1819 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1820 {                                                                       \
1821         return le32_to_cpu(ucode->v1.item);                             \
1822 }
1823
1824 static u32 il3945_ucode_get_header_size(u32 api_ver)
1825 {
1826         return 24;
1827 }
1828
1829 static u8 *il3945_ucode_get_data(const struct il_ucode_header *ucode)
1830 {
1831         return (u8 *) ucode->v1.data;
1832 }
1833
1834 IL3945_UCODE_GET(inst_size);
1835 IL3945_UCODE_GET(data_size);
1836 IL3945_UCODE_GET(init_size);
1837 IL3945_UCODE_GET(init_data_size);
1838 IL3945_UCODE_GET(boot_size);
1839
1840 /**
1841  * il3945_read_ucode - Read uCode images from disk file.
1842  *
1843  * Copy into buffers for card to fetch via bus-mastering
1844  */
1845 static int il3945_read_ucode(struct il_priv *il)
1846 {
1847         const struct il_ucode_header *ucode;
1848         int ret = -EINVAL, idx;
1849         const struct firmware *ucode_raw;
1850         /* firmware file name contains uCode/driver compatibility version */
1851         const char *name_pre = il->cfg->fw_name_pre;
1852         const unsigned int api_max = il->cfg->ucode_api_max;
1853         const unsigned int api_min = il->cfg->ucode_api_min;
1854         char buf[25];
1855         u8 *src;
1856         size_t len;
1857         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1858
1859         /* Ask kernel firmware_class module to get the boot firmware off disk.
1860          * request_firmware() is synchronous, file is in memory on return. */
1861         for (idx = api_max; idx >= api_min; idx--) {
1862                 sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1863                 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1864                 if (ret < 0) {
1865                         IL_ERR("%s firmware file req failed: %d\n",
1866                                   buf, ret);
1867                         if (ret == -ENOENT)
1868                                 continue;
1869                         else
1870                                 goto error;
1871                 } else {
1872                         if (idx < api_max)
1873                                 IL_ERR("Loaded firmware %s, "
1874                                         "which is deprecated. "
1875                                         " Please use API v%u instead.\n",
1876                                           buf, api_max);
1877                         D_INFO("Got firmware '%s' file "
1878                                        "(%zd bytes) from disk\n",
1879                                        buf, ucode_raw->size);
1880                         break;
1881                 }
1882         }
1883
1884         if (ret < 0)
1885                 goto error;
1886
1887         /* Make sure that we got at least our header! */
1888         if (ucode_raw->size <  il3945_ucode_get_header_size(1)) {
1889                 IL_ERR("File size way too small!\n");
1890                 ret = -EINVAL;
1891                 goto err_release;
1892         }
1893
1894         /* Data from ucode file:  header followed by uCode images */
1895         ucode = (struct il_ucode_header *)ucode_raw->data;
1896
1897         il->ucode_ver = le32_to_cpu(ucode->ver);
1898         api_ver = IL_UCODE_API(il->ucode_ver);
1899         inst_size = il3945_ucode_get_inst_size(ucode);
1900         data_size = il3945_ucode_get_data_size(ucode);
1901         init_size = il3945_ucode_get_init_size(ucode);
1902         init_data_size = il3945_ucode_get_init_data_size(ucode);
1903         boot_size = il3945_ucode_get_boot_size(ucode);
1904         src = il3945_ucode_get_data(ucode);
1905
1906         /* api_ver should match the api version forming part of the
1907          * firmware filename ... but we don't check for that and only rely
1908          * on the API version read from firmware header from here on forward */
1909
1910         if (api_ver < api_min || api_ver > api_max) {
1911                 IL_ERR("Driver unable to support your firmware API. "
1912                           "Driver supports v%u, firmware is v%u.\n",
1913                           api_max, api_ver);
1914                 il->ucode_ver = 0;
1915                 ret = -EINVAL;
1916                 goto err_release;
1917         }
1918         if (api_ver != api_max)
1919                 IL_ERR("Firmware has old API version. Expected %u, "
1920                           "got %u. New firmware can be obtained "
1921                           "from http://www.intellinuxwireless.org.\n",
1922                           api_max, api_ver);
1923
1924         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1925                 IL_UCODE_MAJOR(il->ucode_ver),
1926                 IL_UCODE_MINOR(il->ucode_ver),
1927                 IL_UCODE_API(il->ucode_ver),
1928                 IL_UCODE_SERIAL(il->ucode_ver));
1929
1930         snprintf(il->hw->wiphy->fw_version,
1931                  sizeof(il->hw->wiphy->fw_version),
1932                  "%u.%u.%u.%u",
1933                  IL_UCODE_MAJOR(il->ucode_ver),
1934                  IL_UCODE_MINOR(il->ucode_ver),
1935                  IL_UCODE_API(il->ucode_ver),
1936                  IL_UCODE_SERIAL(il->ucode_ver));
1937
1938         D_INFO("f/w package hdr ucode version raw = 0x%x\n",
1939                        il->ucode_ver);
1940         D_INFO("f/w package hdr runtime inst size = %u\n",
1941                        inst_size);
1942         D_INFO("f/w package hdr runtime data size = %u\n",
1943                        data_size);
1944         D_INFO("f/w package hdr init inst size = %u\n",
1945                        init_size);
1946         D_INFO("f/w package hdr init data size = %u\n",
1947                        init_data_size);
1948         D_INFO("f/w package hdr boot inst size = %u\n",
1949                        boot_size);
1950
1951
1952         /* Verify size of file vs. image size info in file's header */
1953         if (ucode_raw->size != il3945_ucode_get_header_size(api_ver) +
1954                 inst_size + data_size + init_size +
1955                 init_data_size + boot_size) {
1956
1957                 D_INFO(
1958                         "uCode file size %zd does not match expected size\n",
1959                         ucode_raw->size);
1960                 ret = -EINVAL;
1961                 goto err_release;
1962         }
1963
1964         /* Verify that uCode images will fit in card's SRAM */
1965         if (inst_size > IL39_MAX_INST_SIZE) {
1966                 D_INFO("uCode instr len %d too large to fit in\n",
1967                                inst_size);
1968                 ret = -EINVAL;
1969                 goto err_release;
1970         }
1971
1972         if (data_size > IL39_MAX_DATA_SIZE) {
1973                 D_INFO("uCode data len %d too large to fit in\n",
1974                                data_size);
1975                 ret = -EINVAL;
1976                 goto err_release;
1977         }
1978         if (init_size > IL39_MAX_INST_SIZE) {
1979                 D_INFO(
1980                                 "uCode init instr len %d too large to fit in\n",
1981                                 init_size);
1982                 ret = -EINVAL;
1983                 goto err_release;
1984         }
1985         if (init_data_size > IL39_MAX_DATA_SIZE) {
1986                 D_INFO(
1987                                 "uCode init data len %d too large to fit in\n",
1988                                 init_data_size);
1989                 ret = -EINVAL;
1990                 goto err_release;
1991         }
1992         if (boot_size > IL39_MAX_BSM_SIZE) {
1993                 D_INFO(
1994                                 "uCode boot instr len %d too large to fit in\n",
1995                                 boot_size);
1996                 ret = -EINVAL;
1997                 goto err_release;
1998         }
1999
2000         /* Allocate ucode buffers for card's bus-master loading ... */
2001
2002         /* Runtime instructions and 2 copies of data:
2003          * 1) unmodified from disk
2004          * 2) backup cache for save/restore during power-downs */
2005         il->ucode_code.len = inst_size;
2006         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
2007
2008         il->ucode_data.len = data_size;
2009         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
2010
2011         il->ucode_data_backup.len = data_size;
2012         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
2013
2014         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
2015             !il->ucode_data_backup.v_addr)
2016                 goto err_pci_alloc;
2017
2018         /* Initialization instructions and data */
2019         if (init_size && init_data_size) {
2020                 il->ucode_init.len = init_size;
2021                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
2022
2023                 il->ucode_init_data.len = init_data_size;
2024                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
2025
2026                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
2027                         goto err_pci_alloc;
2028         }
2029
2030         /* Bootstrap (instructions only, no data) */
2031         if (boot_size) {
2032                 il->ucode_boot.len = boot_size;
2033                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
2034
2035                 if (!il->ucode_boot.v_addr)
2036                         goto err_pci_alloc;
2037         }
2038
2039         /* Copy images into buffers for card's bus-master reads ... */
2040
2041         /* Runtime instructions (first block of data in file) */
2042         len = inst_size;
2043         D_INFO(
2044                 "Copying (but not loading) uCode instr len %zd\n", len);
2045         memcpy(il->ucode_code.v_addr, src, len);
2046         src += len;
2047
2048         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2049                 il->ucode_code.v_addr, (u32)il->ucode_code.p_addr);
2050
2051         /* Runtime data (2nd block)
2052          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2053         len = data_size;
2054         D_INFO(
2055                 "Copying (but not loading) uCode data len %zd\n", len);
2056         memcpy(il->ucode_data.v_addr, src, len);
2057         memcpy(il->ucode_data_backup.v_addr, src, len);
2058         src += len;
2059
2060         /* Initialization instructions (3rd block) */
2061         if (init_size) {
2062                 len = init_size;
2063                 D_INFO(
2064                         "Copying (but not loading) init instr len %zd\n", len);
2065                 memcpy(il->ucode_init.v_addr, src, len);
2066                 src += len;
2067         }
2068
2069         /* Initialization data (4th block) */
2070         if (init_data_size) {
2071                 len = init_data_size;
2072                 D_INFO(
2073                         "Copying (but not loading) init data len %zd\n", len);
2074                 memcpy(il->ucode_init_data.v_addr, src, len);
2075                 src += len;
2076         }
2077
2078         /* Bootstrap instructions (5th block) */
2079         len = boot_size;
2080         D_INFO(
2081                 "Copying (but not loading) boot instr len %zd\n", len);
2082         memcpy(il->ucode_boot.v_addr, src, len);
2083
2084         /* We have our copies now, allow OS release its copies */
2085         release_firmware(ucode_raw);
2086         return 0;
2087
2088  err_pci_alloc:
2089         IL_ERR("failed to allocate pci memory\n");
2090         ret = -ENOMEM;
2091         il3945_dealloc_ucode_pci(il);
2092
2093  err_release:
2094         release_firmware(ucode_raw);
2095
2096  error:
2097         return ret;
2098 }
2099
2100
2101 /**
2102  * il3945_set_ucode_ptrs - Set uCode address location
2103  *
2104  * Tell initialization uCode where to find runtime uCode.
2105  *
2106  * BSM registers initially contain pointers to initialization uCode.
2107  * We need to replace them to load runtime uCode inst and data,
2108  * and to save runtime data when powering down.
2109  */
2110 static int il3945_set_ucode_ptrs(struct il_priv *il)
2111 {
2112         dma_addr_t pinst;
2113         dma_addr_t pdata;
2114
2115         /* bits 31:0 for 3945 */
2116         pinst = il->ucode_code.p_addr;
2117         pdata = il->ucode_data_backup.p_addr;
2118
2119         /* Tell bootstrap uCode where to find image to load */
2120         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2121         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2122         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG,
2123                                  il->ucode_data.len);
2124
2125         /* Inst byte count must be last to set up, bit 31 signals uCode
2126          *   that all new ptr/size info is in place */
2127         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2128                                  il->ucode_code.len | BSM_DRAM_INST_LOAD);
2129
2130         D_INFO("Runtime uCode pointers are set.\n");
2131
2132         return 0;
2133 }
2134
2135 /**
2136  * il3945_init_alive_start - Called after N_ALIVE notification received
2137  *
2138  * Called after N_ALIVE notification received from "initialize" uCode.
2139  *
2140  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2141  */
2142 static void il3945_init_alive_start(struct il_priv *il)
2143 {
2144         /* Check alive response for "valid" sign from uCode */
2145         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2146                 /* We had an error bringing up the hardware, so take it
2147                  * all the way back down so we can try again */
2148                 D_INFO("Initialize Alive failed.\n");
2149                 goto restart;
2150         }
2151
2152         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2153          * This is a paranoid check, because we would not have gotten the
2154          * "initialize" alive if code weren't properly loaded.  */
2155         if (il3945_verify_ucode(il)) {
2156                 /* Runtime instruction load was bad;
2157                  * take it all the way back down so we can try again */
2158                 D_INFO("Bad \"initialize\" uCode load.\n");
2159                 goto restart;
2160         }
2161
2162         /* Send pointers to protocol/runtime uCode image ... init code will
2163          * load and launch runtime uCode, which will send us another "Alive"
2164          * notification. */
2165         D_INFO("Initialization Alive received.\n");
2166         if (il3945_set_ucode_ptrs(il)) {
2167                 /* Runtime instruction load won't happen;
2168                  * take it all the way back down so we can try again */
2169                 D_INFO("Couldn't set up uCode pointers.\n");
2170                 goto restart;
2171         }
2172         return;
2173
2174  restart:
2175         queue_work(il->workqueue, &il->restart);
2176 }
2177
2178 /**
2179  * il3945_alive_start - called after N_ALIVE notification received
2180  *                   from protocol/runtime uCode (initialization uCode's
2181  *                   Alive gets handled by il3945_init_alive_start()).
2182  */
2183 static void il3945_alive_start(struct il_priv *il)
2184 {
2185         int thermal_spin = 0;
2186         u32 rfkill;
2187         struct il_rxon_context *ctx = &il->ctx;
2188
2189         D_INFO("Runtime Alive received.\n");
2190
2191         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2192                 /* We had an error bringing up the hardware, so take it
2193                  * all the way back down so we can try again */
2194                 D_INFO("Alive failed.\n");
2195                 goto restart;
2196         }
2197
2198         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2199          * This is a paranoid check, because we would not have gotten the
2200          * "runtime" alive if code weren't properly loaded.  */
2201         if (il3945_verify_ucode(il)) {
2202                 /* Runtime instruction load was bad;
2203                  * take it all the way back down so we can try again */
2204                 D_INFO("Bad runtime uCode load.\n");
2205                 goto restart;
2206         }
2207
2208         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2209         D_INFO("RFKILL status: 0x%x\n", rfkill);
2210
2211         if (rfkill & 0x1) {
2212                 clear_bit(S_RF_KILL_HW, &il->status);
2213                 /* if RFKILL is not on, then wait for thermal
2214                  * sensor in adapter to kick in */
2215                 while (il3945_hw_get_temperature(il) == 0) {
2216                         thermal_spin++;
2217                         udelay(10);
2218                 }
2219
2220                 if (thermal_spin)
2221                         D_INFO("Thermal calibration took %dus\n",
2222                                        thermal_spin * 10);
2223         } else
2224                 set_bit(S_RF_KILL_HW, &il->status);
2225
2226         /* After the ALIVE response, we can send commands to 3945 uCode */
2227         set_bit(S_ALIVE, &il->status);
2228
2229         /* Enable watchdog to monitor the driver tx queues */
2230         il_setup_watchdog(il);
2231
2232         if (il_is_rfkill(il))
2233                 return;
2234
2235         ieee80211_wake_queues(il->hw);
2236
2237         il->active_rate = RATES_MASK_3945;
2238
2239         il_power_update_mode(il, true);
2240
2241         if (il_is_associated(il)) {
2242                 struct il3945_rxon_cmd *active_rxon =
2243                                 (struct il3945_rxon_cmd *)(&ctx->active);
2244
2245                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2246                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2247         } else {
2248                 /* Initialize our rx_config data */
2249                 il_connection_init_rx_config(il, ctx);
2250         }
2251
2252         /* Configure Bluetooth device coexistence support */
2253         il_send_bt_config(il);
2254
2255         set_bit(S_READY, &il->status);
2256
2257         /* Configure the adapter for unassociated operation */
2258         il3945_commit_rxon(il, ctx);
2259
2260         il3945_reg_txpower_periodic(il);
2261
2262         D_INFO("ALIVE processing complete.\n");
2263         wake_up(&il->wait_command_queue);
2264
2265         return;
2266
2267  restart:
2268         queue_work(il->workqueue, &il->restart);
2269 }
2270
2271 static void il3945_cancel_deferred_work(struct il_priv *il);
2272
2273 static void __il3945_down(struct il_priv *il)
2274 {
2275         unsigned long flags;
2276         int exit_pending;
2277
2278         D_INFO(DRV_NAME " is going down\n");
2279
2280         il_scan_cancel_timeout(il, 200);
2281
2282         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2283
2284         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2285          * to prevent rearm timer */
2286         del_timer_sync(&il->watchdog);
2287
2288         /* Station information will now be cleared in device */
2289         il_clear_ucode_stations(il, NULL);
2290         il_dealloc_bcast_stations(il);
2291         il_clear_driver_stations(il);
2292
2293         /* Unblock any waiting calls */
2294         wake_up_all(&il->wait_command_queue);
2295
2296         /* Wipe out the EXIT_PENDING status bit if we are not actually
2297          * exiting the module */
2298         if (!exit_pending)
2299                 clear_bit(S_EXIT_PENDING, &il->status);
2300
2301         /* stop and reset the on-board processor */
2302         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2303
2304         /* tell the device to stop sending interrupts */
2305         spin_lock_irqsave(&il->lock, flags);
2306         il_disable_interrupts(il);
2307         spin_unlock_irqrestore(&il->lock, flags);
2308         il3945_synchronize_irq(il);
2309
2310         if (il->mac80211_registered)
2311                 ieee80211_stop_queues(il->hw);
2312
2313         /* If we have not previously called il3945_init() then
2314          * clear all bits but the RF Kill bits and return */
2315         if (!il_is_init(il)) {
2316                 il->status = test_bit(S_RF_KILL_HW, &il->status) <<
2317                                         S_RF_KILL_HW |
2318                                test_bit(S_GEO_CONFIGURED, &il->status) <<
2319                                         S_GEO_CONFIGURED |
2320                                 test_bit(S_EXIT_PENDING, &il->status) <<
2321                                         S_EXIT_PENDING;
2322                 goto exit;
2323         }
2324
2325         /* ...otherwise clear out all the status bits but the RF Kill
2326          * bit and continue taking the NIC down. */
2327         il->status &= test_bit(S_RF_KILL_HW, &il->status) <<
2328                                 S_RF_KILL_HW |
2329                         test_bit(S_GEO_CONFIGURED, &il->status) <<
2330                                 S_GEO_CONFIGURED |
2331                         test_bit(S_FW_ERROR, &il->status) <<
2332                                 S_FW_ERROR |
2333                         test_bit(S_EXIT_PENDING, &il->status) <<
2334                                 S_EXIT_PENDING;
2335
2336         il3945_hw_txq_ctx_stop(il);
2337         il3945_hw_rxq_stop(il);
2338
2339         /* Power-down device's busmaster DMA clocks */
2340         il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2341         udelay(5);
2342
2343         /* Stop the device, and put it in low power state */
2344         il_apm_stop(il);
2345
2346  exit:
2347         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2348
2349         if (il->beacon_skb)
2350                 dev_kfree_skb(il->beacon_skb);
2351         il->beacon_skb = NULL;
2352
2353         /* clear out any free frames */
2354         il3945_clear_free_frames(il);
2355 }
2356
2357 static void il3945_down(struct il_priv *il)
2358 {
2359         mutex_lock(&il->mutex);
2360         __il3945_down(il);
2361         mutex_unlock(&il->mutex);
2362
2363         il3945_cancel_deferred_work(il);
2364 }
2365
2366 #define MAX_HW_RESTARTS 5
2367
2368 static int il3945_alloc_bcast_station(struct il_priv *il)
2369 {
2370         struct il_rxon_context *ctx = &il->ctx;
2371         unsigned long flags;
2372         u8 sta_id;
2373
2374         spin_lock_irqsave(&il->sta_lock, flags);
2375         sta_id = il_prep_station(il, ctx,
2376                                         il_bcast_addr, false, NULL);
2377         if (sta_id == IL_INVALID_STATION) {
2378                 IL_ERR("Unable to prepare broadcast station\n");
2379                 spin_unlock_irqrestore(&il->sta_lock, flags);
2380
2381                 return -EINVAL;
2382         }
2383
2384         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2385         il->stations[sta_id].used |= IL_STA_BCAST;
2386         spin_unlock_irqrestore(&il->sta_lock, flags);
2387
2388         return 0;
2389 }
2390
2391 static int __il3945_up(struct il_priv *il)
2392 {
2393         int rc, i;
2394
2395         rc = il3945_alloc_bcast_station(il);
2396         if (rc)
2397                 return rc;
2398
2399         if (test_bit(S_EXIT_PENDING, &il->status)) {
2400                 IL_WARN("Exit pending; will not bring the NIC up\n");
2401                 return -EIO;
2402         }
2403
2404         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2405                 IL_ERR("ucode not available for device bring up\n");
2406                 return -EIO;
2407         }
2408
2409         /* If platform's RF_KILL switch is NOT set to KILL */
2410         if (_il_rd(il, CSR_GP_CNTRL) &
2411                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2412                 clear_bit(S_RF_KILL_HW, &il->status);
2413         else {
2414                 set_bit(S_RF_KILL_HW, &il->status);
2415                 IL_WARN("Radio disabled by HW RF Kill switch\n");
2416                 return -ENODEV;
2417         }
2418
2419         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2420
2421         rc = il3945_hw_nic_init(il);
2422         if (rc) {
2423                 IL_ERR("Unable to int nic\n");
2424                 return rc;
2425         }
2426
2427         /* make sure rfkill handshake bits are cleared */
2428         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2429         _il_wr(il, CSR_UCODE_DRV_GP1_CLR,
2430                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2431
2432         /* clear (again), then enable host interrupts */
2433         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2434         il_enable_interrupts(il);
2435
2436         /* really make sure rfkill handshake bits are cleared */
2437         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2438         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2439
2440         /* Copy original ucode data image from disk into backup cache.
2441          * This will be used to initialize the on-board processor's
2442          * data SRAM for a clean start when the runtime program first loads. */
2443         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2444                il->ucode_data.len);
2445
2446         /* We return success when we resume from suspend and rf_kill is on. */
2447         if (test_bit(S_RF_KILL_HW, &il->status))
2448                 return 0;
2449
2450         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2451
2452                 /* load bootstrap state machine,
2453                  * load bootstrap program into processor's memory,
2454                  * prepare to load the "initialize" uCode */
2455                 rc = il->cfg->ops->lib->load_ucode(il);
2456
2457                 if (rc) {
2458                         IL_ERR(
2459                                 "Unable to set up bootstrap uCode: %d\n", rc);
2460                         continue;
2461                 }
2462
2463                 /* start card; "initialize" will load runtime ucode */
2464                 il3945_nic_start(il);
2465
2466                 D_INFO(DRV_NAME " is coming up\n");
2467
2468                 return 0;
2469         }
2470
2471         set_bit(S_EXIT_PENDING, &il->status);
2472         __il3945_down(il);
2473         clear_bit(S_EXIT_PENDING, &il->status);
2474
2475         /* tried to restart and config the device for as long as our
2476          * patience could withstand */
2477         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2478         return -EIO;
2479 }
2480
2481
2482 /*****************************************************************************
2483  *
2484  * Workqueue callbacks
2485  *
2486  *****************************************************************************/
2487
2488 static void il3945_bg_init_alive_start(struct work_struct *data)
2489 {
2490         struct il_priv *il =
2491             container_of(data, struct il_priv, init_alive_start.work);
2492
2493         mutex_lock(&il->mutex);
2494         if (test_bit(S_EXIT_PENDING, &il->status))
2495                 goto out;
2496
2497         il3945_init_alive_start(il);
2498 out:
2499         mutex_unlock(&il->mutex);
2500 }
2501
2502 static void il3945_bg_alive_start(struct work_struct *data)
2503 {
2504         struct il_priv *il =
2505             container_of(data, struct il_priv, alive_start.work);
2506
2507         mutex_lock(&il->mutex);
2508         if (test_bit(S_EXIT_PENDING, &il->status))
2509                 goto out;
2510
2511         il3945_alive_start(il);
2512 out:
2513         mutex_unlock(&il->mutex);
2514 }
2515
2516 /*
2517  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2518  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2519  * *is* readable even when device has been SW_RESET into low power mode
2520  * (e.g. during RF KILL).
2521  */
2522 static void il3945_rfkill_poll(struct work_struct *data)
2523 {
2524         struct il_priv *il =
2525             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2526         bool old_rfkill = test_bit(S_RF_KILL_HW, &il->status);
2527         bool new_rfkill = !(_il_rd(il, CSR_GP_CNTRL)
2528                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2529
2530         if (new_rfkill != old_rfkill) {
2531                 if (new_rfkill)
2532                         set_bit(S_RF_KILL_HW, &il->status);
2533                 else
2534                         clear_bit(S_RF_KILL_HW, &il->status);
2535
2536                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2537
2538                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2539                                 new_rfkill ? "disable radio" : "enable radio");
2540         }
2541
2542         /* Keep this running, even if radio now enabled.  This will be
2543          * cancelled in mac_start() if system decides to start again */
2544         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2545                            round_jiffies_relative(2 * HZ));
2546
2547 }
2548
2549 int il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2550 {
2551         struct il_host_cmd cmd = {
2552                 .id = C_SCAN,
2553                 .len = sizeof(struct il3945_scan_cmd),
2554                 .flags = CMD_SIZE_HUGE,
2555         };
2556         struct il3945_scan_cmd *scan;
2557         u8 n_probes = 0;
2558         enum ieee80211_band band;
2559         bool is_active = false;
2560         int ret;
2561         u16 len;
2562
2563         lockdep_assert_held(&il->mutex);
2564
2565         if (!il->scan_cmd) {
2566                 il->scan_cmd = kmalloc(sizeof(struct il3945_scan_cmd) +
2567                                          IL_MAX_SCAN_SIZE, GFP_KERNEL);
2568                 if (!il->scan_cmd) {
2569                         D_SCAN("Fail to allocate scan memory\n");
2570                         return -ENOMEM;
2571                 }
2572         }
2573         scan = il->scan_cmd;
2574         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2575
2576         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2577         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2578
2579         if (il_is_associated(il)) {
2580                 u16 interval;
2581                 u32 extra;
2582                 u32 suspend_time = 100;
2583                 u32 scan_suspend_time = 100;
2584
2585                 D_INFO("Scanning while associated...\n");
2586
2587                 interval = vif->bss_conf.beacon_int;
2588
2589                 scan->suspend_time = 0;
2590                 scan->max_out_time = cpu_to_le32(200 * 1024);
2591                 if (!interval)
2592                         interval = suspend_time;
2593                 /*
2594                  * suspend time format:
2595                  *  0-19: beacon interval in usec (time before exec.)
2596                  * 20-23: 0
2597                  * 24-31: number of beacons (suspend between channels)
2598                  */
2599
2600                 extra = (suspend_time / interval) << 24;
2601                 scan_suspend_time = 0xFF0FFFFF &
2602                     (extra | ((suspend_time % interval) * 1024));
2603
2604                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2605                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2606                                scan_suspend_time, interval);
2607         }
2608
2609         if (il->scan_request->n_ssids) {
2610                 int i, p = 0;
2611                 D_SCAN("Kicking off active scan\n");
2612                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2613                         /* always does wildcard anyway */
2614                         if (!il->scan_request->ssids[i].ssid_len)
2615                                 continue;
2616                         scan->direct_scan[p].id = WLAN_EID_SSID;
2617                         scan->direct_scan[p].len =
2618                                 il->scan_request->ssids[i].ssid_len;
2619                         memcpy(scan->direct_scan[p].ssid,
2620                                il->scan_request->ssids[i].ssid,
2621                                il->scan_request->ssids[i].ssid_len);
2622                         n_probes++;
2623                         p++;
2624                 }
2625                 is_active = true;
2626         } else
2627                 D_SCAN("Kicking off passive scan.\n");
2628
2629         /* We don't build a direct scan probe request; the uCode will do
2630          * that based on the direct_mask added to each channel entry */
2631         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2632         scan->tx_cmd.sta_id = il->ctx.bcast_sta_id;
2633         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2634
2635         /* flags + rate selection */
2636
2637         switch (il->scan_band) {
2638         case IEEE80211_BAND_2GHZ:
2639                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2640                 scan->tx_cmd.rate = RATE_1M_PLCP;
2641                 band = IEEE80211_BAND_2GHZ;
2642                 break;
2643         case IEEE80211_BAND_5GHZ:
2644                 scan->tx_cmd.rate = RATE_6M_PLCP;
2645                 band = IEEE80211_BAND_5GHZ;
2646                 break;
2647         default:
2648                 IL_WARN("Invalid scan band\n");
2649                 return -EIO;
2650         }
2651
2652         /*
2653          * If active scaning is requested but a certain channel
2654          * is marked passive, we can do active scanning if we
2655          * detect transmissions.
2656          */
2657         scan->good_CRC_th = is_active ? IL_GOOD_CRC_TH_DEFAULT :
2658                                         IL_GOOD_CRC_TH_DISABLED;
2659
2660         len = il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2661                                         vif->addr, il->scan_request->ie,
2662                                         il->scan_request->ie_len,
2663                                         IL_MAX_SCAN_SIZE - sizeof(*scan));
2664         scan->tx_cmd.len = cpu_to_le16(len);
2665
2666         /* select Rx antennas */
2667         scan->flags |= il3945_get_antenna_flags(il);
2668
2669         scan->channel_count = il3945_get_channels_for_scan(il, band, is_active, n_probes,
2670                                                             (void *)&scan->data[len], vif);
2671         if (scan->channel_count == 0) {
2672                 D_SCAN("channel count %d\n", scan->channel_count);
2673                 return -EIO;
2674         }
2675
2676         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2677             scan->channel_count * sizeof(struct il3945_scan_channel);
2678         cmd.data = scan;
2679         scan->len = cpu_to_le16(cmd.len);
2680
2681         set_bit(S_SCAN_HW, &il->status);
2682         ret = il_send_cmd_sync(il, &cmd);
2683         if (ret)
2684                 clear_bit(S_SCAN_HW, &il->status);
2685         return ret;
2686 }
2687
2688 void il3945_post_scan(struct il_priv *il)
2689 {
2690         struct il_rxon_context *ctx = &il->ctx;
2691
2692         /*
2693          * Since setting the RXON may have been deferred while
2694          * performing the scan, fire one off if needed
2695          */
2696         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
2697                 il3945_commit_rxon(il, ctx);
2698 }
2699
2700 static void il3945_bg_restart(struct work_struct *data)
2701 {
2702         struct il_priv *il = container_of(data, struct il_priv, restart);
2703
2704         if (test_bit(S_EXIT_PENDING, &il->status))
2705                 return;
2706
2707         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2708                 mutex_lock(&il->mutex);
2709                 il->ctx.vif = NULL;
2710                 il->is_open = 0;
2711                 mutex_unlock(&il->mutex);
2712                 il3945_down(il);
2713                 ieee80211_restart_hw(il->hw);
2714         } else {
2715                 il3945_down(il);
2716
2717                 mutex_lock(&il->mutex);
2718                 if (test_bit(S_EXIT_PENDING, &il->status)) {
2719                         mutex_unlock(&il->mutex);
2720                         return;
2721                 }
2722
2723                 __il3945_up(il);
2724                 mutex_unlock(&il->mutex);
2725         }
2726 }
2727
2728 static void il3945_bg_rx_replenish(struct work_struct *data)
2729 {
2730         struct il_priv *il =
2731             container_of(data, struct il_priv, rx_replenish);
2732
2733         mutex_lock(&il->mutex);
2734         if (test_bit(S_EXIT_PENDING, &il->status))
2735                 goto out;
2736
2737         il3945_rx_replenish(il);
2738 out:
2739         mutex_unlock(&il->mutex);
2740 }
2741
2742 void il3945_post_associate(struct il_priv *il)
2743 {
2744         int rc = 0;
2745         struct ieee80211_conf *conf = NULL;
2746         struct il_rxon_context *ctx = &il->ctx;
2747
2748         if (!ctx->vif || !il->is_open)
2749                 return;
2750
2751         D_ASSOC("Associated as %d to: %pM\n",
2752                         ctx->vif->bss_conf.aid, ctx->active.bssid_addr);
2753
2754         if (test_bit(S_EXIT_PENDING, &il->status))
2755                 return;
2756
2757         il_scan_cancel_timeout(il, 200);
2758
2759         conf = &il->hw->conf;
2760
2761         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2762         il3945_commit_rxon(il, ctx);
2763
2764         rc = il_send_rxon_timing(il, ctx);
2765         if (rc)
2766                 IL_WARN("C_RXON_TIMING failed - "
2767                             "Attempting to continue.\n");
2768
2769         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2770
2771         ctx->staging.assoc_id = cpu_to_le16(ctx->vif->bss_conf.aid);
2772
2773         D_ASSOC("assoc id %d beacon interval %d\n",
2774                         ctx->vif->bss_conf.aid, ctx->vif->bss_conf.beacon_int);
2775
2776         if (ctx->vif->bss_conf.use_short_preamble)
2777                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2778         else
2779                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2780
2781         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2782                 if (ctx->vif->bss_conf.use_short_slot)
2783                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2784                 else
2785                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2786         }
2787
2788         il3945_commit_rxon(il, ctx);
2789
2790         switch (ctx->vif->type) {
2791         case NL80211_IFTYPE_STATION:
2792                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2793                 break;
2794         case NL80211_IFTYPE_ADHOC:
2795                 il3945_send_beacon_cmd(il);
2796                 break;
2797         default:
2798                 IL_ERR("%s Should not be called in %d mode\n",
2799                         __func__, ctx->vif->type);
2800                 break;
2801         }
2802 }
2803
2804 /*****************************************************************************
2805  *
2806  * mac80211 entry point functions
2807  *
2808  *****************************************************************************/
2809
2810 #define UCODE_READY_TIMEOUT     (2 * HZ)
2811
2812 static int il3945_mac_start(struct ieee80211_hw *hw)
2813 {
2814         struct il_priv *il = hw->priv;
2815         int ret;
2816
2817         D_MAC80211("enter\n");
2818
2819         /* we should be verifying the device is ready to be opened */
2820         mutex_lock(&il->mutex);
2821
2822         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2823          * ucode filename and max sizes are card-specific. */
2824
2825         if (!il->ucode_code.len) {
2826                 ret = il3945_read_ucode(il);
2827                 if (ret) {
2828                         IL_ERR("Could not read microcode: %d\n", ret);
2829                         mutex_unlock(&il->mutex);
2830                         goto out_release_irq;
2831                 }
2832         }
2833
2834         ret = __il3945_up(il);
2835
2836         mutex_unlock(&il->mutex);
2837
2838         if (ret)
2839                 goto out_release_irq;
2840
2841         D_INFO("Start UP work.\n");
2842
2843         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2844          * mac80211 will not be run successfully. */
2845         ret = wait_event_timeout(il->wait_command_queue,
2846                         test_bit(S_READY, &il->status),
2847                         UCODE_READY_TIMEOUT);
2848         if (!ret) {
2849                 if (!test_bit(S_READY, &il->status)) {
2850                         IL_ERR(
2851                                 "Wait for START_ALIVE timeout after %dms.\n",
2852                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2853                         ret = -ETIMEDOUT;
2854                         goto out_release_irq;
2855                 }
2856         }
2857
2858         /* ucode is running and will send rfkill notifications,
2859          * no need to poll the killswitch state anymore */
2860         cancel_delayed_work(&il->_3945.rfkill_poll);
2861
2862         il->is_open = 1;
2863         D_MAC80211("leave\n");
2864         return 0;
2865
2866 out_release_irq:
2867         il->is_open = 0;
2868         D_MAC80211("leave - failed\n");
2869         return ret;
2870 }
2871
2872 static void il3945_mac_stop(struct ieee80211_hw *hw)
2873 {
2874         struct il_priv *il = hw->priv;
2875
2876         D_MAC80211("enter\n");
2877
2878         if (!il->is_open) {
2879                 D_MAC80211("leave - skip\n");
2880                 return;
2881         }
2882
2883         il->is_open = 0;
2884
2885         il3945_down(il);
2886
2887         flush_workqueue(il->workqueue);
2888
2889         /* start polling the killswitch state again */
2890         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2891                            round_jiffies_relative(2 * HZ));
2892
2893         D_MAC80211("leave\n");
2894 }
2895
2896 static void il3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2897 {
2898         struct il_priv *il = hw->priv;
2899
2900         D_MAC80211("enter\n");
2901
2902         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2903                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2904
2905         if (il3945_tx_skb(il, skb))
2906                 dev_kfree_skb_any(skb);
2907
2908         D_MAC80211("leave\n");
2909 }
2910
2911 void il3945_config_ap(struct il_priv *il)
2912 {
2913         struct il_rxon_context *ctx = &il->ctx;
2914         struct ieee80211_vif *vif = ctx->vif;
2915         int rc = 0;
2916
2917         if (test_bit(S_EXIT_PENDING, &il->status))
2918                 return;
2919
2920         /* The following should be done only at AP bring up */
2921         if (!(il_is_associated(il))) {
2922
2923                 /* RXON - unassoc (to set timing command) */
2924                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2925                 il3945_commit_rxon(il, ctx);
2926
2927                 /* RXON Timing */
2928                 rc = il_send_rxon_timing(il, ctx);
2929                 if (rc)
2930                         IL_WARN("C_RXON_TIMING failed - "
2931                                         "Attempting to continue.\n");
2932
2933                 ctx->staging.assoc_id = 0;
2934
2935                 if (vif->bss_conf.use_short_preamble)
2936                         ctx->staging.flags |=
2937                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2938                 else
2939                         ctx->staging.flags &=
2940                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2941
2942                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2943                         if (vif->bss_conf.use_short_slot)
2944                                 ctx->staging.flags |=
2945                                         RXON_FLG_SHORT_SLOT_MSK;
2946                         else
2947                                 ctx->staging.flags &=
2948                                         ~RXON_FLG_SHORT_SLOT_MSK;
2949                 }
2950                 /* restore RXON assoc */
2951                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2952                 il3945_commit_rxon(il, ctx);
2953         }
2954         il3945_send_beacon_cmd(il);
2955 }
2956
2957 static int il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2958                                struct ieee80211_vif *vif,
2959                                struct ieee80211_sta *sta,
2960                                struct ieee80211_key_conf *key)
2961 {
2962         struct il_priv *il = hw->priv;
2963         int ret = 0;
2964         u8 sta_id = IL_INVALID_STATION;
2965         u8 static_key;
2966
2967         D_MAC80211("enter\n");
2968
2969         if (il3945_mod_params.sw_crypto) {
2970                 D_MAC80211("leave - hwcrypto disabled\n");
2971                 return -EOPNOTSUPP;
2972         }
2973
2974         /*
2975          * To support IBSS RSN, don't program group keys in IBSS, the
2976          * hardware will then not attempt to decrypt the frames.
2977          */
2978         if (vif->type == NL80211_IFTYPE_ADHOC &&
2979             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2980                 return -EOPNOTSUPP;
2981
2982         static_key = !il_is_associated(il);
2983
2984         if (!static_key) {
2985                 sta_id = il_sta_id_or_broadcast(
2986                                 il, &il->ctx, sta);
2987                 if (sta_id == IL_INVALID_STATION)
2988                         return -EINVAL;
2989         }
2990
2991         mutex_lock(&il->mutex);
2992         il_scan_cancel_timeout(il, 100);
2993
2994         switch (cmd) {
2995         case SET_KEY:
2996                 if (static_key)
2997                         ret = il3945_set_static_key(il, key);
2998                 else
2999                         ret = il3945_set_dynamic_key(il, key, sta_id);
3000                 D_MAC80211("enable hwcrypto key\n");
3001                 break;
3002         case DISABLE_KEY:
3003                 if (static_key)
3004                         ret = il3945_remove_static_key(il);
3005                 else
3006                         ret = il3945_clear_sta_key_info(il, sta_id);
3007                 D_MAC80211("disable hwcrypto key\n");
3008                 break;
3009         default:
3010                 ret = -EINVAL;
3011         }
3012
3013         mutex_unlock(&il->mutex);
3014         D_MAC80211("leave\n");
3015
3016         return ret;
3017 }
3018
3019 static int il3945_mac_sta_add(struct ieee80211_hw *hw,
3020                                struct ieee80211_vif *vif,
3021                                struct ieee80211_sta *sta)
3022 {
3023         struct il_priv *il = hw->priv;
3024         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3025         int ret;
3026         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3027         u8 sta_id;
3028
3029         D_INFO("received request to add station %pM\n",
3030                         sta->addr);
3031         mutex_lock(&il->mutex);
3032         D_INFO("proceeding to add station %pM\n",
3033                         sta->addr);
3034         sta_priv->common.sta_id = IL_INVALID_STATION;
3035
3036
3037         ret = il_add_station_common(il,
3038                                 &il->ctx,
3039                                      sta->addr, is_ap, sta, &sta_id);
3040         if (ret) {
3041                 IL_ERR("Unable to add station %pM (%d)\n",
3042                         sta->addr, ret);
3043                 /* Should we return success if return code is EEXIST ? */
3044                 mutex_unlock(&il->mutex);
3045                 return ret;
3046         }
3047
3048         sta_priv->common.sta_id = sta_id;
3049
3050         /* Initialize rate scaling */
3051         D_INFO("Initializing rate scaling for station %pM\n",
3052                        sta->addr);
3053         il3945_rs_rate_init(il, sta, sta_id);
3054         mutex_unlock(&il->mutex);
3055
3056         return 0;
3057 }
3058
3059 static void il3945_configure_filter(struct ieee80211_hw *hw,
3060                                      unsigned int changed_flags,
3061                                      unsigned int *total_flags,
3062                                      u64 multicast)
3063 {
3064         struct il_priv *il = hw->priv;
3065         __le32 filter_or = 0, filter_nand = 0;
3066         struct il_rxon_context *ctx = &il->ctx;
3067
3068 #define CHK(test, flag) do { \
3069         if (*total_flags & (test))              \
3070                 filter_or |= (flag);            \
3071         else                                    \
3072                 filter_nand |= (flag);          \
3073         } while (0)
3074
3075         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
3076                         changed_flags, *total_flags);
3077
3078         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3079         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3080         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3081
3082 #undef CHK
3083
3084         mutex_lock(&il->mutex);
3085
3086         ctx->staging.filter_flags &= ~filter_nand;
3087         ctx->staging.filter_flags |= filter_or;
3088
3089         /*
3090          * Not committing directly because hardware can perform a scan,
3091          * but even if hw is ready, committing here breaks for some reason,
3092          * we'll eventually commit the filter flags change anyway.
3093          */
3094
3095         mutex_unlock(&il->mutex);
3096
3097         /*
3098          * Receiving all multicast frames is always enabled by the
3099          * default flags setup in il_connection_init_rx_config()
3100          * since we currently do not support programming multicast
3101          * filters into the device.
3102          */
3103         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3104                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3105 }
3106
3107
3108 /*****************************************************************************
3109  *
3110  * sysfs attributes
3111  *
3112  *****************************************************************************/
3113
3114 #ifdef CONFIG_IWLEGACY_DEBUG
3115
3116 /*
3117  * The following adds a new attribute to the sysfs representation
3118  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3119  * used for controlling the debug level.
3120  *
3121  * See the level definitions in iwl for details.
3122  *
3123  * The debug_level being managed using sysfs below is a per device debug
3124  * level that is used instead of the global debug level if it (the per
3125  * device debug level) is set.
3126  */
3127 static ssize_t il3945_show_debug_level(struct device *d,
3128                                 struct device_attribute *attr, char *buf)
3129 {
3130         struct il_priv *il = dev_get_drvdata(d);
3131         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3132 }
3133 static ssize_t il3945_store_debug_level(struct device *d,
3134                                 struct device_attribute *attr,
3135                                  const char *buf, size_t count)
3136 {
3137         struct il_priv *il = dev_get_drvdata(d);
3138         unsigned long val;
3139         int ret;
3140
3141         ret = strict_strtoul(buf, 0, &val);
3142         if (ret)
3143                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3144         else {
3145                 il->debug_level = val;
3146                 if (il_alloc_traffic_mem(il))
3147                         IL_ERR(
3148                                 "Not enough memory to generate traffic log\n");
3149         }
3150         return strnlen(buf, count);
3151 }
3152
3153 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3154                         il3945_show_debug_level, il3945_store_debug_level);
3155
3156 #endif /* CONFIG_IWLEGACY_DEBUG */
3157
3158 static ssize_t il3945_show_temperature(struct device *d,
3159                                 struct device_attribute *attr, char *buf)
3160 {
3161         struct il_priv *il = dev_get_drvdata(d);
3162
3163         if (!il_is_alive(il))
3164                 return -EAGAIN;
3165
3166         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3167 }
3168
3169 static DEVICE_ATTR(temperature, S_IRUGO, il3945_show_temperature, NULL);
3170
3171 static ssize_t il3945_show_tx_power(struct device *d,
3172                              struct device_attribute *attr, char *buf)
3173 {
3174         struct il_priv *il = dev_get_drvdata(d);
3175         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3176 }
3177
3178 static ssize_t il3945_store_tx_power(struct device *d,
3179                               struct device_attribute *attr,
3180                               const char *buf, size_t count)
3181 {
3182         struct il_priv *il = dev_get_drvdata(d);
3183         char *p = (char *)buf;
3184         u32 val;
3185
3186         val = simple_strtoul(p, &p, 10);
3187         if (p == buf)
3188                 IL_INFO(": %s is not in decimal form.\n", buf);
3189         else
3190                 il3945_hw_reg_set_txpower(il, val);
3191
3192         return count;
3193 }
3194
3195 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il3945_show_tx_power, il3945_store_tx_power);
3196
3197 static ssize_t il3945_show_flags(struct device *d,
3198                           struct device_attribute *attr, char *buf)
3199 {
3200         struct il_priv *il = dev_get_drvdata(d);
3201         struct il_rxon_context *ctx = &il->ctx;
3202
3203         return sprintf(buf, "0x%04X\n", ctx->active.flags);
3204 }
3205
3206 static ssize_t il3945_store_flags(struct device *d,
3207                            struct device_attribute *attr,
3208                            const char *buf, size_t count)
3209 {
3210         struct il_priv *il = dev_get_drvdata(d);
3211         u32 flags = simple_strtoul(buf, NULL, 0);
3212         struct il_rxon_context *ctx = &il->ctx;
3213
3214         mutex_lock(&il->mutex);
3215         if (le32_to_cpu(ctx->staging.flags) != flags) {
3216                 /* Cancel any currently running scans... */
3217                 if (il_scan_cancel_timeout(il, 100))
3218                         IL_WARN("Could not cancel scan.\n");
3219                 else {
3220                         D_INFO("Committing rxon.flags = 0x%04X\n",
3221                                        flags);
3222                         ctx->staging.flags = cpu_to_le32(flags);
3223                         il3945_commit_rxon(il, ctx);
3224                 }
3225         }
3226         mutex_unlock(&il->mutex);
3227
3228         return count;
3229 }
3230
3231 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, il3945_show_flags, il3945_store_flags);
3232
3233 static ssize_t il3945_show_filter_flags(struct device *d,
3234                                  struct device_attribute *attr, char *buf)
3235 {
3236         struct il_priv *il = dev_get_drvdata(d);
3237         struct il_rxon_context *ctx = &il->ctx;
3238
3239         return sprintf(buf, "0x%04X\n",
3240                 le32_to_cpu(ctx->active.filter_flags));
3241 }
3242
3243 static ssize_t il3945_store_filter_flags(struct device *d,
3244                                   struct device_attribute *attr,
3245                                   const char *buf, size_t count)
3246 {
3247         struct il_priv *il = dev_get_drvdata(d);
3248         struct il_rxon_context *ctx = &il->ctx;
3249         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3250
3251         mutex_lock(&il->mutex);
3252         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3253                 /* Cancel any currently running scans... */
3254                 if (il_scan_cancel_timeout(il, 100))
3255                         IL_WARN("Could not cancel scan.\n");
3256                 else {
3257                         D_INFO("Committing rxon.filter_flags = "
3258                                        "0x%04X\n", filter_flags);
3259                         ctx->staging.filter_flags =
3260                                 cpu_to_le32(filter_flags);
3261                         il3945_commit_rxon(il, ctx);
3262                 }
3263         }
3264         mutex_unlock(&il->mutex);
3265
3266         return count;
3267 }
3268
3269 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, il3945_show_filter_flags,
3270                    il3945_store_filter_flags);
3271
3272 static ssize_t il3945_show_measurement(struct device *d,
3273                                 struct device_attribute *attr, char *buf)
3274 {
3275         struct il_priv *il = dev_get_drvdata(d);
3276         struct il_spectrum_notification measure_report;
3277         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3278         u8 *data = (u8 *)&measure_report;
3279         unsigned long flags;
3280
3281         spin_lock_irqsave(&il->lock, flags);
3282         if (!(il->measurement_status & MEASUREMENT_READY)) {
3283                 spin_unlock_irqrestore(&il->lock, flags);
3284                 return 0;
3285         }
3286         memcpy(&measure_report, &il->measure_report, size);
3287         il->measurement_status = 0;
3288         spin_unlock_irqrestore(&il->lock, flags);
3289
3290         while (size && PAGE_SIZE - len) {
3291                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3292                                    PAGE_SIZE - len, 1);
3293                 len = strlen(buf);
3294                 if (PAGE_SIZE - len)
3295                         buf[len++] = '\n';
3296
3297                 ofs += 16;
3298                 size -= min(size, 16U);
3299         }
3300
3301         return len;
3302 }
3303
3304 static ssize_t il3945_store_measurement(struct device *d,
3305                                  struct device_attribute *attr,
3306                                  const char *buf, size_t count)
3307 {
3308         struct il_priv *il = dev_get_drvdata(d);
3309         struct il_rxon_context *ctx = &il->ctx;
3310         struct ieee80211_measurement_params params = {
3311                 .channel = le16_to_cpu(ctx->active.channel),
3312                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3313                 .duration = cpu_to_le16(1),
3314         };
3315         u8 type = IL_MEASURE_BASIC;
3316         u8 buffer[32];
3317         u8 channel;
3318
3319         if (count) {
3320                 char *p = buffer;
3321                 strncpy(buffer, buf, min(sizeof(buffer), count));
3322                 channel = simple_strtoul(p, NULL, 0);
3323                 if (channel)
3324                         params.channel = channel;
3325
3326                 p = buffer;
3327                 while (*p && *p != ' ')
3328                         p++;
3329                 if (*p)
3330                         type = simple_strtoul(p + 1, NULL, 0);
3331         }
3332
3333         D_INFO("Invoking measurement of type %d on "
3334                        "channel %d (for '%s')\n", type, params.channel, buf);
3335         il3945_get_measurement(il, &params, type);
3336
3337         return count;
3338 }
3339
3340 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3341                    il3945_show_measurement, il3945_store_measurement);
3342
3343 static ssize_t il3945_store_retry_rate(struct device *d,
3344                                 struct device_attribute *attr,
3345                                 const char *buf, size_t count)
3346 {
3347         struct il_priv *il = dev_get_drvdata(d);
3348
3349         il->retry_rate = simple_strtoul(buf, NULL, 0);
3350         if (il->retry_rate <= 0)
3351                 il->retry_rate = 1;
3352
3353         return count;
3354 }
3355
3356 static ssize_t il3945_show_retry_rate(struct device *d,
3357                                struct device_attribute *attr, char *buf)
3358 {
3359         struct il_priv *il = dev_get_drvdata(d);
3360         return sprintf(buf, "%d", il->retry_rate);
3361 }
3362
3363 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, il3945_show_retry_rate,
3364                    il3945_store_retry_rate);
3365
3366
3367 static ssize_t il3945_show_channels(struct device *d,
3368                              struct device_attribute *attr, char *buf)
3369 {
3370         /* all this shit doesn't belong into sysfs anyway */
3371         return 0;
3372 }
3373
3374 static DEVICE_ATTR(channels, S_IRUSR, il3945_show_channels, NULL);
3375
3376 static ssize_t il3945_show_antenna(struct device *d,
3377                             struct device_attribute *attr, char *buf)
3378 {
3379         struct il_priv *il = dev_get_drvdata(d);
3380
3381         if (!il_is_alive(il))
3382                 return -EAGAIN;
3383
3384         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3385 }
3386
3387 static ssize_t il3945_store_antenna(struct device *d,
3388                              struct device_attribute *attr,
3389                              const char *buf, size_t count)
3390 {
3391         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3392         int ant;
3393
3394         if (count == 0)
3395                 return 0;
3396
3397         if (sscanf(buf, "%1i", &ant) != 1) {
3398                 D_INFO("not in hex or decimal form.\n");
3399                 return count;
3400         }
3401
3402         if (ant >= 0 && ant <= 2) {
3403                 D_INFO("Setting antenna select to %d.\n", ant);
3404                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3405         } else
3406                 D_INFO("Bad antenna select value %d.\n", ant);
3407
3408
3409         return count;
3410 }
3411
3412 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, il3945_show_antenna, il3945_store_antenna);
3413
3414 static ssize_t il3945_show_status(struct device *d,
3415                            struct device_attribute *attr, char *buf)
3416 {
3417         struct il_priv *il = dev_get_drvdata(d);
3418         if (!il_is_alive(il))
3419                 return -EAGAIN;
3420         return sprintf(buf, "0x%08x\n", (int)il->status);
3421 }
3422
3423 static DEVICE_ATTR(status, S_IRUGO, il3945_show_status, NULL);
3424
3425 static ssize_t il3945_dump_error_log(struct device *d,
3426                               struct device_attribute *attr,
3427                               const char *buf, size_t count)
3428 {
3429         struct il_priv *il = dev_get_drvdata(d);
3430         char *p = (char *)buf;
3431
3432         if (p[0] == '1')
3433                 il3945_dump_nic_error_log(il);
3434
3435         return strnlen(buf, count);
3436 }
3437
3438 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, il3945_dump_error_log);
3439
3440 /*****************************************************************************
3441  *
3442  * driver setup and tear down
3443  *
3444  *****************************************************************************/
3445
3446 static void il3945_setup_deferred_work(struct il_priv *il)
3447 {
3448         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3449
3450         init_waitqueue_head(&il->wait_command_queue);
3451
3452         INIT_WORK(&il->restart, il3945_bg_restart);
3453         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3454         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3455         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3456         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3457
3458         il_setup_scan_deferred_work(il);
3459
3460         il3945_hw_setup_deferred_work(il);
3461
3462         init_timer(&il->watchdog);
3463         il->watchdog.data = (unsigned long)il;
3464         il->watchdog.function = il_bg_watchdog;
3465
3466         tasklet_init(&il->irq_tasklet, (void (*)(unsigned long))
3467                      il3945_irq_tasklet, (unsigned long)il);
3468 }
3469
3470 static void il3945_cancel_deferred_work(struct il_priv *il)
3471 {
3472         il3945_hw_cancel_deferred_work(il);
3473
3474         cancel_delayed_work_sync(&il->init_alive_start);
3475         cancel_delayed_work(&il->alive_start);
3476
3477         il_cancel_scan_deferred_work(il);
3478 }
3479
3480 static struct attribute *il3945_sysfs_entries[] = {
3481         &dev_attr_antenna.attr,
3482         &dev_attr_channels.attr,
3483         &dev_attr_dump_errors.attr,
3484         &dev_attr_flags.attr,
3485         &dev_attr_filter_flags.attr,
3486         &dev_attr_measurement.attr,
3487         &dev_attr_retry_rate.attr,
3488         &dev_attr_status.attr,
3489         &dev_attr_temperature.attr,
3490         &dev_attr_tx_power.attr,
3491 #ifdef CONFIG_IWLEGACY_DEBUG
3492         &dev_attr_debug_level.attr,
3493 #endif
3494         NULL
3495 };
3496
3497 static struct attribute_group il3945_attribute_group = {
3498         .name = NULL,           /* put in device directory */
3499         .attrs = il3945_sysfs_entries,
3500 };
3501
3502 struct ieee80211_ops il3945_hw_ops = {
3503         .tx = il3945_mac_tx,
3504         .start = il3945_mac_start,
3505         .stop = il3945_mac_stop,
3506         .add_interface = il_mac_add_interface,
3507         .remove_interface = il_mac_remove_interface,
3508         .change_interface = il_mac_change_interface,
3509         .config = il_mac_config,
3510         .configure_filter = il3945_configure_filter,
3511         .set_key = il3945_mac_set_key,
3512         .conf_tx = il_mac_conf_tx,
3513         .reset_tsf = il_mac_reset_tsf,
3514         .bss_info_changed = il_mac_bss_info_changed,
3515         .hw_scan = il_mac_hw_scan,
3516         .sta_add = il3945_mac_sta_add,
3517         .sta_remove = il_mac_sta_remove,
3518         .tx_last_beacon = il_mac_tx_last_beacon,
3519 };
3520
3521 static int il3945_init_drv(struct il_priv *il)
3522 {
3523         int ret;
3524         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3525
3526         il->retry_rate = 1;
3527         il->beacon_skb = NULL;
3528
3529         spin_lock_init(&il->sta_lock);
3530         spin_lock_init(&il->hcmd_lock);
3531
3532         INIT_LIST_HEAD(&il->free_frames);
3533
3534         mutex_init(&il->mutex);
3535
3536         il->ieee_channels = NULL;
3537         il->ieee_rates = NULL;
3538         il->band = IEEE80211_BAND_2GHZ;
3539
3540         il->iw_mode = NL80211_IFTYPE_STATION;
3541         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3542
3543         /* initialize force reset */
3544         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3545
3546         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3547                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3548                          eeprom->version);
3549                 ret = -EINVAL;
3550                 goto err;
3551         }
3552         ret = il_init_channel_map(il);
3553         if (ret) {
3554                 IL_ERR("initializing regulatory failed: %d\n", ret);
3555                 goto err;
3556         }
3557
3558         /* Set up txpower settings in driver for all channels */
3559         if (il3945_txpower_set_from_eeprom(il)) {
3560                 ret = -EIO;
3561                 goto err_free_channel_map;
3562         }
3563
3564         ret = il_init_geos(il);
3565         if (ret) {
3566                 IL_ERR("initializing geos failed: %d\n", ret);
3567                 goto err_free_channel_map;
3568         }
3569         il3945_init_hw_rates(il, il->ieee_rates);
3570
3571         return 0;
3572
3573 err_free_channel_map:
3574         il_free_channel_map(il);
3575 err:
3576         return ret;
3577 }
3578
3579 #define IL3945_MAX_PROBE_REQUEST        200
3580
3581 static int il3945_setup_mac(struct il_priv *il)
3582 {
3583         int ret;
3584         struct ieee80211_hw *hw = il->hw;
3585
3586         hw->rate_control_algorithm = "iwl-3945-rs";
3587         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3588         hw->vif_data_size = sizeof(struct il_vif_priv);
3589
3590         /* Tell mac80211 our characteristics */
3591         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3592                     IEEE80211_HW_SPECTRUM_MGMT;
3593
3594         hw->wiphy->interface_modes =
3595                 il->ctx.interface_modes;
3596
3597         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3598                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
3599                             WIPHY_FLAG_IBSS_RSN;
3600
3601         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3602         /* we create the 802.11 header and a zero-length SSID element */
3603         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3604
3605         /* Default value; 4 EDCA QOS priorities */
3606         hw->queues = 4;
3607
3608         if (il->bands[IEEE80211_BAND_2GHZ].n_channels)
3609                 il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3610                         &il->bands[IEEE80211_BAND_2GHZ];
3611
3612         if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
3613                 il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3614                         &il->bands[IEEE80211_BAND_5GHZ];
3615
3616         il_leds_init(il);
3617
3618         ret = ieee80211_register_hw(il->hw);
3619         if (ret) {
3620                 IL_ERR("Failed to register hw (error %d)\n", ret);
3621                 return ret;
3622         }
3623         il->mac80211_registered = 1;
3624
3625         return 0;
3626 }
3627
3628 static int il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3629 {
3630         int err = 0;
3631         struct il_priv *il;
3632         struct ieee80211_hw *hw;
3633         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3634         struct il3945_eeprom *eeprom;
3635         unsigned long flags;
3636
3637         /***********************
3638          * 1. Allocating HW data
3639          * ********************/
3640
3641         /* mac80211 allocates memory for this device instance, including
3642          *   space for this driver's ilate structure */
3643         hw = il_alloc_all(cfg);
3644         if (hw == NULL) {
3645                 pr_err("Can not allocate network device\n");
3646                 err = -ENOMEM;
3647                 goto out;
3648         }
3649         il = hw->priv;
3650         SET_IEEE80211_DEV(hw, &pdev->dev);
3651
3652         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3653
3654         il->ctx.ctxid = 0;
3655
3656         il->ctx.rxon_cmd = C_RXON;
3657         il->ctx.rxon_timing_cmd = C_RXON_TIMING;
3658         il->ctx.rxon_assoc_cmd = C_RXON_ASSOC;
3659         il->ctx.qos_cmd = C_QOS_PARAM;
3660         il->ctx.ap_sta_id = IL_AP_ID;
3661         il->ctx.wep_key_cmd = C_WEPKEY;
3662         il->ctx.interface_modes =
3663                 BIT(NL80211_IFTYPE_STATION) |
3664                 BIT(NL80211_IFTYPE_ADHOC);
3665         il->ctx.ibss_devtype = RXON_DEV_TYPE_IBSS;
3666         il->ctx.station_devtype = RXON_DEV_TYPE_ESS;
3667         il->ctx.unused_devtype = RXON_DEV_TYPE_ESS;
3668
3669         /*
3670          * Disabling hardware scan means that mac80211 will perform scans
3671          * "the hard way", rather than using device's scan.
3672          */
3673         if (il3945_mod_params.disable_hw_scan) {
3674                 D_INFO("Disabling hw_scan\n");
3675                 il3945_hw_ops.hw_scan = NULL;
3676         }
3677
3678         D_INFO("*** LOAD DRIVER ***\n");
3679         il->cfg = cfg;
3680         il->pci_dev = pdev;
3681         il->inta_mask = CSR_INI_SET_MASK;
3682
3683         if (il_alloc_traffic_mem(il))
3684                 IL_ERR("Not enough memory to generate traffic log\n");
3685
3686         /***************************
3687          * 2. Initializing PCI bus
3688          * *************************/
3689         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3690                                 PCIE_LINK_STATE_CLKPM);
3691
3692         if (pci_enable_device(pdev)) {
3693                 err = -ENODEV;
3694                 goto out_ieee80211_free_hw;
3695         }
3696
3697         pci_set_master(pdev);
3698
3699         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3700         if (!err)
3701                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3702         if (err) {
3703                 IL_WARN("No suitable DMA available.\n");
3704                 goto out_pci_disable_device;
3705         }
3706
3707         pci_set_drvdata(pdev, il);
3708         err = pci_request_regions(pdev, DRV_NAME);
3709         if (err)
3710                 goto out_pci_disable_device;
3711
3712         /***********************
3713          * 3. Read REV Register
3714          * ********************/
3715         il->hw_base = pci_iomap(pdev, 0, 0);
3716         if (!il->hw_base) {
3717                 err = -ENODEV;
3718                 goto out_pci_release_regions;
3719         }
3720
3721         D_INFO("pci_resource_len = 0x%08llx\n",
3722                         (unsigned long long) pci_resource_len(pdev, 0));
3723         D_INFO("pci_resource_base = %p\n", il->hw_base);
3724
3725         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3726          * PCI Tx retries from interfering with C3 CPU state */
3727         pci_write_config_byte(pdev, 0x41, 0x00);
3728
3729         /* these spin locks will be used in apm_ops.init and EEPROM access
3730          * we should init now
3731          */
3732         spin_lock_init(&il->reg_lock);
3733         spin_lock_init(&il->lock);
3734
3735         /*
3736          * stop and reset the on-board processor just in case it is in a
3737          * strange state ... like being left stranded by a primary kernel
3738          * and this is now the kdump kernel trying to start up
3739          */
3740         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3741
3742         /***********************
3743          * 4. Read EEPROM
3744          * ********************/
3745
3746         /* Read the EEPROM */
3747         err = il_eeprom_init(il);
3748         if (err) {
3749                 IL_ERR("Unable to init EEPROM\n");
3750                 goto out_iounmap;
3751         }
3752         /* MAC Address location in EEPROM same for 3945/4965 */
3753         eeprom = (struct il3945_eeprom *)il->eeprom;
3754         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3755         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3756
3757         /***********************
3758          * 5. Setup HW Constants
3759          * ********************/
3760         /* Device-specific setup */
3761         if (il3945_hw_set_hw_params(il)) {
3762                 IL_ERR("failed to set hw settings\n");
3763                 goto out_eeprom_free;
3764         }
3765
3766         /***********************
3767          * 6. Setup il
3768          * ********************/
3769
3770         err = il3945_init_drv(il);
3771         if (err) {
3772                 IL_ERR("initializing driver failed\n");
3773                 goto out_unset_hw_params;
3774         }
3775
3776         IL_INFO("Detected Intel Wireless WiFi Link %s\n",
3777                 il->cfg->name);
3778
3779         /***********************
3780          * 7. Setup Services
3781          * ********************/
3782
3783         spin_lock_irqsave(&il->lock, flags);
3784         il_disable_interrupts(il);
3785         spin_unlock_irqrestore(&il->lock, flags);
3786
3787         pci_enable_msi(il->pci_dev);
3788
3789         err = request_irq(il->pci_dev->irq, il_isr,
3790                           IRQF_SHARED, DRV_NAME, il);
3791         if (err) {
3792                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3793                 goto out_disable_msi;
3794         }
3795
3796         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3797         if (err) {
3798                 IL_ERR("failed to create sysfs device attributes\n");
3799                 goto out_release_irq;
3800         }
3801
3802         il_set_rxon_channel(il,
3803                              &il->bands[IEEE80211_BAND_2GHZ].channels[5],
3804                              &il->ctx);
3805         il3945_setup_deferred_work(il);
3806         il3945_setup_handlers(il);
3807         il_power_initialize(il);
3808
3809         /*********************************
3810          * 8. Setup and Register mac80211
3811          * *******************************/
3812
3813         il_enable_interrupts(il);
3814
3815         err = il3945_setup_mac(il);
3816         if (err)
3817                 goto  out_remove_sysfs;
3818
3819         err = il_dbgfs_register(il, DRV_NAME);
3820         if (err)
3821                 IL_ERR("failed to create debugfs files. Ignoring error: %d\n", err);
3822
3823         /* Start monitoring the killswitch */
3824         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
3825                            2 * HZ);
3826
3827         return 0;
3828
3829  out_remove_sysfs:
3830         destroy_workqueue(il->workqueue);
3831         il->workqueue = NULL;
3832         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3833  out_release_irq:
3834         free_irq(il->pci_dev->irq, il);
3835  out_disable_msi:
3836         pci_disable_msi(il->pci_dev);
3837         il_free_geos(il);
3838         il_free_channel_map(il);
3839  out_unset_hw_params:
3840         il3945_unset_hw_params(il);
3841  out_eeprom_free:
3842         il_eeprom_free(il);
3843  out_iounmap:
3844         pci_iounmap(pdev, il->hw_base);
3845  out_pci_release_regions:
3846         pci_release_regions(pdev);
3847  out_pci_disable_device:
3848         pci_set_drvdata(pdev, NULL);
3849         pci_disable_device(pdev);
3850  out_ieee80211_free_hw:
3851         il_free_traffic_mem(il);
3852         ieee80211_free_hw(il->hw);
3853  out:
3854         return err;
3855 }
3856
3857 static void __devexit il3945_pci_remove(struct pci_dev *pdev)
3858 {
3859         struct il_priv *il = pci_get_drvdata(pdev);
3860         unsigned long flags;
3861
3862         if (!il)
3863                 return;
3864
3865         D_INFO("*** UNLOAD DRIVER ***\n");
3866
3867         il_dbgfs_unregister(il);
3868
3869         set_bit(S_EXIT_PENDING, &il->status);
3870
3871         il_leds_exit(il);
3872
3873         if (il->mac80211_registered) {
3874                 ieee80211_unregister_hw(il->hw);
3875                 il->mac80211_registered = 0;
3876         } else {
3877                 il3945_down(il);
3878         }
3879
3880         /*
3881          * Make sure device is reset to low power before unloading driver.
3882          * This may be redundant with il_down(), but there are paths to
3883          * run il_down() without calling apm_ops.stop(), and there are
3884          * paths to avoid running il_down() at all before leaving driver.
3885          * This (inexpensive) call *makes sure* device is reset.
3886          */
3887         il_apm_stop(il);
3888
3889         /* make sure we flush any pending irq or
3890          * tasklet for the driver
3891          */
3892         spin_lock_irqsave(&il->lock, flags);
3893         il_disable_interrupts(il);
3894         spin_unlock_irqrestore(&il->lock, flags);
3895
3896         il3945_synchronize_irq(il);
3897
3898         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3899
3900         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3901
3902         il3945_dealloc_ucode_pci(il);
3903
3904         if (il->rxq.bd)
3905                 il3945_rx_queue_free(il, &il->rxq);
3906         il3945_hw_txq_ctx_free(il);
3907
3908         il3945_unset_hw_params(il);
3909
3910         /*netif_stop_queue(dev); */
3911         flush_workqueue(il->workqueue);
3912
3913         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3914          * il->workqueue... so we can't take down the workqueue
3915          * until now... */
3916         destroy_workqueue(il->workqueue);
3917         il->workqueue = NULL;
3918         il_free_traffic_mem(il);
3919
3920         free_irq(pdev->irq, il);
3921         pci_disable_msi(pdev);
3922
3923         pci_iounmap(pdev, il->hw_base);
3924         pci_release_regions(pdev);
3925         pci_disable_device(pdev);
3926         pci_set_drvdata(pdev, NULL);
3927
3928         il_free_channel_map(il);
3929         il_free_geos(il);
3930         kfree(il->scan_cmd);
3931         if (il->beacon_skb)
3932                 dev_kfree_skb(il->beacon_skb);
3933
3934         ieee80211_free_hw(il->hw);
3935 }
3936
3937
3938 /*****************************************************************************
3939  *
3940  * driver and module entry point
3941  *
3942  *****************************************************************************/
3943
3944 static struct pci_driver il3945_driver = {
3945         .name = DRV_NAME,
3946         .id_table = il3945_hw_card_ids,
3947         .probe = il3945_pci_probe,
3948         .remove = __devexit_p(il3945_pci_remove),
3949         .driver.pm = IL_LEGACY_PM_OPS,
3950 };
3951
3952 static int __init il3945_init(void)
3953 {
3954
3955         int ret;
3956         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3957         pr_info(DRV_COPYRIGHT "\n");
3958
3959         ret = il3945_rate_control_register();
3960         if (ret) {
3961                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3962                 return ret;
3963         }
3964
3965         ret = pci_register_driver(&il3945_driver);
3966         if (ret) {
3967                 pr_err("Unable to initialize PCI module\n");
3968                 goto error_register;
3969         }
3970
3971         return ret;
3972
3973 error_register:
3974         il3945_rate_control_unregister();
3975         return ret;
3976 }
3977
3978 static void __exit il3945_exit(void)
3979 {
3980         pci_unregister_driver(&il3945_driver);
3981         il3945_rate_control_unregister();
3982 }
3983
3984 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3985
3986 module_param_named(antenna, il3945_mod_params.antenna, int, S_IRUGO);
3987 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3988 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, S_IRUGO);
3989 MODULE_PARM_DESC(swcrypto,
3990                 "using software crypto (default 1 [software])");
3991 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan,
3992                 int, S_IRUGO);
3993 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3994 #ifdef CONFIG_IWLEGACY_DEBUG
3995 module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
3996 MODULE_PARM_DESC(debug, "debug output mask");
3997 #endif
3998 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, S_IRUGO);
3999 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
4000
4001 module_exit(il3945_exit);
4002 module_init(il3945_init);