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