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