Pileus Git - ~andy/linux/blob - 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->hw_params.bcast_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);
 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, 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         txq->skbs[q->write_ptr] = skb;
 542
 543         /* Init first empty entry in queue's array of Tx/cmd buffers */
 544         out_cmd = txq->cmd[idx];
 545         out_meta = &txq->meta[idx];
 546         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 547         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 548         memset(tx_cmd, 0, sizeof(*tx_cmd));
 549
 550         /*
 551          * Set up the Tx-command (not MAC!) header.
 552          * Store the chosen Tx queue and TFD idx within the sequence field;
 553          * after Tx, uCode's Tx response will return this value so driver can
 554          * locate the frame within the tx queue and do post-tx processing.
 555          */
 556         out_cmd->hdr.cmd = C_TX;
 557         out_cmd->hdr.sequence =
 558             cpu_to_le16((u16)
 559                         (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 560
 561         /* Copy MAC header from skb into command buffer */
 562         memcpy(tx_cmd->hdr, hdr, hdr_len);
 563
 564         if (info->control.hw_key)
 565                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 566
 567         /* TODO need this for burst mode later on */
 568         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 569
 570         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 571
 572         /* Total # bytes to be transmitted */
 573         len = (u16) skb->len;
 574         tx_cmd->len = cpu_to_le16(len);
 575
 576         il_update_stats(il, true, fc, len);
 577         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 578         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 579
 580         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 581                 txq->need_update = 1;
 582         } else {
 583                 wait_write_ptr = 1;
 584                 txq->need_update = 0;
 585         }
 586
 587         D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
 588         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 589         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 590         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
 591                           ieee80211_hdrlen(fc));
 592
 593         /*
 594          * Use the first empty entry in this queue's command buffer array
 595          * to contain the Tx command and MAC header concatenated together
 596          * (payload data will be in another buffer).
 597          * Size of this varies, due to varying MAC header length.
 598          * If end is not dword aligned, we'll have 2 extra bytes at the end
 599          * of the MAC header (device reads on dword boundaries).
 600          * We'll tell device about this padding later.
 601          */
 602         len =
 603             sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
 604             hdr_len;
 605         len = (len + 3) & ~3;
 606
 607         /* Physical address of this Tx command's header (not MAC header!),
 608          * within command buffer array. */
 609         txcmd_phys =
 610             pci_map_single(il->pci_dev, &out_cmd->hdr, len, PCI_DMA_TODEVICE);
 611         /* we do not map meta data ... so we can safely access address to
 612          * provide to unmap command*/
 613         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 614         dma_unmap_len_set(out_meta, len, len);
 615
 616         /* Add buffer containing Tx command and MAC(!) header to TFD's
 617          * first entry */
 618         il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, len, 1, 0);
 619
 620         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 621          * if any (802.11 null frames have no payload). */
 622         len = skb->len - hdr_len;
 623         if (len) {
 624                 phys_addr =
 625                     pci_map_single(il->pci_dev, skb->data + hdr_len, len,
 626                                    PCI_DMA_TODEVICE);
 627                 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, len, 0,
 628                                                U32_PAD(len));
 629         }
 630
 631         /* Tell device the write idx *just past* this latest filled TFD */
 632         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 633         il_txq_update_write_ptr(il, txq);
 634         spin_unlock_irqrestore(&il->lock, flags);
 635
 636         if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
 637                 if (wait_write_ptr) {
 638                         spin_lock_irqsave(&il->lock, flags);
 639                         txq->need_update = 1;
 640                         il_txq_update_write_ptr(il, txq);
 641                         spin_unlock_irqrestore(&il->lock, flags);
 642                 }
 643
 644                 il_stop_queue(il, txq);
 645         }
 646
 647         return 0;
 648
 649 drop_unlock:
 650         spin_unlock_irqrestore(&il->lock, flags);
 651 drop:
 652         return -1;
 653 }
 654
 655 static int
 656 il3945_get_measurement(struct il_priv *il,
 657                        struct ieee80211_measurement_params *params, u8 type)
 658 {
 659         struct il_spectrum_cmd spectrum;
 660         struct il_rx_pkt *pkt;
 661         struct il_host_cmd cmd = {
 662                 .id = C_SPECTRUM_MEASUREMENT,
 663                 .data = (void *)&spectrum,
 664                 .flags = CMD_WANT_SKB,
 665         };
 666         u32 add_time = le64_to_cpu(params->start_time);
 667         int rc;
 668         int spectrum_resp_status;
 669         int duration = le16_to_cpu(params->duration);
 670
 671         if (il_is_associated(il))
 672                 add_time =
 673                     il_usecs_to_beacons(il,
 674                                         le64_to_cpu(params->start_time) -
 675                                         il->_3945.last_tsf,
 676                                         le16_to_cpu(il->timing.beacon_interval));
 677
 678         memset(&spectrum, 0, sizeof(spectrum));
 679
 680         spectrum.channel_count = cpu_to_le16(1);
 681         spectrum.flags =
 682             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 683         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 684         cmd.len = sizeof(spectrum);
 685         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 686
 687         if (il_is_associated(il))
 688                 spectrum.start_time =
 689                     il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
 690                                        le16_to_cpu(il->timing.beacon_interval));
 691         else
 692                 spectrum.start_time = 0;
 693
 694         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 695         spectrum.channels[0].channel = params->channel;
 696         spectrum.channels[0].type = type;
 697         if (il->active.flags & RXON_FLG_BAND_24G_MSK)
 698                 spectrum.flags |=
 699                     RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
 700                     RXON_FLG_TGG_PROTECT_MSK;
 701
 702         rc = il_send_cmd_sync(il, &cmd);
 703         if (rc)
 704                 return rc;
 705
 706         pkt = (struct il_rx_pkt *)cmd.reply_page;
 707         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 708                 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 709                 rc = -EIO;
 710         }
 711
 712         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 713         switch (spectrum_resp_status) {
 714         case 0:         /* Command will be handled */
 715                 if (pkt->u.spectrum.id != 0xff) {
 716                         D_INFO("Replaced existing measurement: %d\n",
 717                                pkt->u.spectrum.id);
 718                         il->measurement_status &= ~MEASUREMENT_READY;
 719                 }
 720                 il->measurement_status |= MEASUREMENT_ACTIVE;
 721                 rc = 0;
 722                 break;
 723
 724         case 1:         /* Command will not be handled */
 725                 rc = -EAGAIN;
 726                 break;
 727         }
 728
 729         il_free_pages(il, cmd.reply_page);
 730
 731         return rc;
 732 }
 733
 734 static void
 735 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 736 {
 737         struct il_rx_pkt *pkt = rxb_addr(rxb);
 738         struct il_alive_resp *palive;
 739         struct delayed_work *pwork;
 740
 741         palive = &pkt->u.alive_frame;
 742
 743         D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
 744                palive->is_valid, palive->ver_type, palive->ver_subtype);
 745
 746         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 747                 D_INFO("Initialization Alive received.\n");
 748                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 749                        sizeof(struct il_alive_resp));
 750                 pwork = &il->init_alive_start;
 751         } else {
 752                 D_INFO("Runtime Alive received.\n");
 753                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 754                        sizeof(struct il_alive_resp));
 755                 pwork = &il->alive_start;
 756                 il3945_disable_events(il);
 757         }
 758
 759         /* We delay the ALIVE response by 5ms to
 760          * give the HW RF Kill time to activate... */
 761         if (palive->is_valid == UCODE_VALID_OK)
 762                 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
 763         else
 764                 IL_WARN("uCode did not respond OK.\n");
 765 }
 766
 767 static void
 768 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 769 {
 770 #ifdef CONFIG_IWLEGACY_DEBUG
 771         struct il_rx_pkt *pkt = rxb_addr(rxb);
 772 #endif
 773
 774         D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 775 }
 776
 777 static void
 778 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 779 {
 780         struct il_rx_pkt *pkt = rxb_addr(rxb);
 781         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 782 #ifdef CONFIG_IWLEGACY_DEBUG
 783         u8 rate = beacon->beacon_notify_hdr.rate;
 784
 785         D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
 786              le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 787              beacon->beacon_notify_hdr.failure_frame,
 788              le32_to_cpu(beacon->ibss_mgr_status),
 789              le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 790 #endif
 791
 792         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 793
 794 }
 795
 796 /* Handle notification from uCode that card's power state is changing
 797  * due to software, hardware, or critical temperature RFKILL */
 798 static void
 799 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 800 {
 801         struct il_rx_pkt *pkt = rxb_addr(rxb);
 802         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 803         unsigned long status = il->status;
 804
 805         IL_WARN("Card state received: HW:%s SW:%s\n",
 806                 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 807                 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 808
 809         _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 810
 811         if (flags & HW_CARD_DISABLED)
 812                 set_bit(S_RFKILL, &il->status);
 813         else
 814                 clear_bit(S_RFKILL, &il->status);
 815
 816         il_scan_cancel(il);
 817
 818         if ((test_bit(S_RFKILL, &status) !=
 819              test_bit(S_RFKILL, &il->status)))
 820                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 821                                           test_bit(S_RFKILL, &il->status));
 822         else
 823                 wake_up(&il->wait_command_queue);
 824 }
 825
 826 /**
 827  * il3945_setup_handlers - Initialize Rx handler callbacks
 828  *
 829  * Setup the RX handlers for each of the reply types sent from the uCode
 830  * to the host.
 831  *
 832  * This function chains into the hardware specific files for them to setup
 833  * any hardware specific handlers as well.
 834  */
 835 static void
 836 il3945_setup_handlers(struct il_priv *il)
 837 {
 838         il->handlers[N_ALIVE] = il3945_hdl_alive;
 839         il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 840         il->handlers[N_ERROR] = il_hdl_error;
 841         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 842         il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
 843         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 844         il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
 845         il->handlers[N_BEACON] = il3945_hdl_beacon;
 846
 847         /*
 848          * The same handler is used for both the REPLY to a discrete
 849          * stats request from the host as well as for the periodic
 850          * stats notifications (after received beacons) from the uCode.
 851          */
 852         il->handlers[C_STATS] = il3945_hdl_c_stats;
 853         il->handlers[N_STATS] = il3945_hdl_stats;
 854
 855         il_setup_rx_scan_handlers(il);
 856         il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 857
 858         /* Set up hardware specific Rx handlers */
 859         il3945_hw_handler_setup(il);
 860 }
 861
 862 /************************** RX-FUNCTIONS ****************************/
 863 /*
 864  * Rx theory of operation
 865  *
 866  * The host allocates 32 DMA target addresses and passes the host address
 867  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 868  * 0 to 31
 869  *
 870  * Rx Queue Indexes
 871  * The host/firmware share two idx registers for managing the Rx buffers.
 872  *
 873  * The READ idx maps to the first position that the firmware may be writing
 874  * to -- the driver can read up to (but not including) this position and get
 875  * good data.
 876  * The READ idx is managed by the firmware once the card is enabled.
 877  *
 878  * The WRITE idx maps to the last position the driver has read from -- the
 879  * position preceding WRITE is the last slot the firmware can place a packet.
 880  *
 881  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 882  * WRITE = READ.
 883  *
 884  * During initialization, the host sets up the READ queue position to the first
 885  * IDX position, and WRITE to the last (READ - 1 wrapped)
 886  *
 887  * When the firmware places a packet in a buffer, it will advance the READ idx
 888  * and fire the RX interrupt.  The driver can then query the READ idx and
 889  * process as many packets as possible, moving the WRITE idx forward as it
 890  * resets the Rx queue buffers with new memory.
 891  *
 892  * The management in the driver is as follows:
 893  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 894  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 895  *   to replenish the iwl->rxq->rx_free.
 896  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 897  *   iwl->rxq is replenished and the READ IDX is updated (updating the
 898  *   'processed' and 'read' driver idxes as well)
 899  * + A received packet is processed and handed to the kernel network stack,
 900  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 901  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 902  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 903  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 904  *   were enough free buffers and RX_STALLED is set it is cleared.
 905  *
 906  *
 907  * Driver sequence:
 908  *
 909  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 910  *                            il3945_rx_queue_restock
 911  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 912  *                            queue, updates firmware pointers, and updates
 913  *                            the WRITE idx.  If insufficient rx_free buffers
 914  *                            are available, schedules il3945_rx_replenish
 915  *
 916  * -- enable interrupts --
 917  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 918  *                            READ IDX, detaching the SKB from the pool.
 919  *                            Moves the packet buffer from queue to rx_used.
 920  *                            Calls il3945_rx_queue_restock to refill any empty
 921  *                            slots.
 922  * ...
 923  *
 924  */
 925
 926 /**
 927  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 928  */
 929 static inline __le32
 930 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 931 {
 932         return cpu_to_le32((u32) dma_addr);
 933 }
 934
 935 /**
 936  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 937  *
 938  * If there are slots in the RX queue that need to be restocked,
 939  * and we have free pre-allocated buffers, fill the ranks as much
 940  * as we can, pulling from rx_free.
 941  *
 942  * This moves the 'write' idx forward to catch up with 'processed', and
 943  * also updates the memory address in the firmware to reference the new
 944  * target buffer.
 945  */
 946 static void
 947 il3945_rx_queue_restock(struct il_priv *il)
 948 {
 949         struct il_rx_queue *rxq = &il->rxq;
 950         struct list_head *element;
 951         struct il_rx_buf *rxb;
 952         unsigned long flags;
 953         int write;
 954
 955         spin_lock_irqsave(&rxq->lock, flags);
 956         write = rxq->write & ~0x7;
 957         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 958                 /* Get next free Rx buffer, remove from free list */
 959                 element = rxq->rx_free.next;
 960                 rxb = list_entry(element, struct il_rx_buf, list);
 961                 list_del(element);
 962
 963                 /* Point to Rx buffer via next RBD in circular buffer */
 964                 rxq->bd[rxq->write] =
 965                     il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 966                 rxq->queue[rxq->write] = rxb;
 967                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 968                 rxq->free_count--;
 969         }
 970         spin_unlock_irqrestore(&rxq->lock, flags);
 971         /* If the pre-allocated buffer pool is dropping low, schedule to
 972          * refill it */
 973         if (rxq->free_count <= RX_LOW_WATERMARK)
 974                 queue_work(il->workqueue, &il->rx_replenish);
 975
 976         /* If we've added more space for the firmware to place data, tell it.
 977          * Increment device's write pointer in multiples of 8. */
 978         if (rxq->write_actual != (rxq->write & ~0x7) ||
 979             abs(rxq->write - rxq->read) > 7) {
 980                 spin_lock_irqsave(&rxq->lock, flags);
 981                 rxq->need_update = 1;
 982                 spin_unlock_irqrestore(&rxq->lock, flags);
 983                 il_rx_queue_update_write_ptr(il, rxq);
 984         }
 985 }
 986
 987 /**
 988  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
 989  *
 990  * When moving to rx_free an SKB is allocated for the slot.
 991  *
 992  * Also restock the Rx queue via il3945_rx_queue_restock.
 993  * This is called as a scheduled work item (except for during initialization)
 994  */
 995 static void
 996 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
 997 {
 998         struct il_rx_queue *rxq = &il->rxq;
 999         struct list_head *element;
1000         struct il_rx_buf *rxb;
1001         struct page *page;
1002         unsigned long flags;
1003         gfp_t gfp_mask = priority;
1004
1005         while (1) {
1006                 spin_lock_irqsave(&rxq->lock, flags);
1007
1008                 if (list_empty(&rxq->rx_used)) {
1009                         spin_unlock_irqrestore(&rxq->lock, flags);
1010                         return;
1011                 }
1012                 spin_unlock_irqrestore(&rxq->lock, flags);
1013
1014                 if (rxq->free_count > RX_LOW_WATERMARK)
1015                         gfp_mask |= __GFP_NOWARN;
1016
1017                 if (il->hw_params.rx_page_order > 0)
1018                         gfp_mask |= __GFP_COMP;
1019
1020                 /* Alloc a new receive buffer */
1021                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1022                 if (!page) {
1023                         if (net_ratelimit())
1024                                 D_INFO("Failed to allocate SKB buffer.\n");
1025                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1026                             net_ratelimit())
1027                                 IL_ERR("Failed to allocate SKB buffer with %0x."
1028                                        "Only %u free buffers remaining.\n",
1029                                        priority, rxq->free_count);
1030                         /* We don't reschedule replenish work here -- we will
1031                          * call the restock method and if it still needs
1032                          * more buffers it will schedule replenish */
1033                         break;
1034                 }
1035
1036                 spin_lock_irqsave(&rxq->lock, flags);
1037                 if (list_empty(&rxq->rx_used)) {
1038                         spin_unlock_irqrestore(&rxq->lock, flags);
1039                         __free_pages(page, il->hw_params.rx_page_order);
1040                         return;
1041                 }
1042                 element = rxq->rx_used.next;
1043                 rxb = list_entry(element, struct il_rx_buf, list);
1044                 list_del(element);
1045                 spin_unlock_irqrestore(&rxq->lock, flags);
1046
1047                 rxb->page = page;
1048                 /* Get physical address of RB/SKB */
1049                 rxb->page_dma =
1050                     pci_map_page(il->pci_dev, page, 0,
1051                                  PAGE_SIZE << il->hw_params.rx_page_order,
1052                                  PCI_DMA_FROMDEVICE);
1053
1054                 spin_lock_irqsave(&rxq->lock, flags);
1055
1056                 list_add_tail(&rxb->list, &rxq->rx_free);
1057                 rxq->free_count++;
1058                 il->alloc_rxb_page++;
1059
1060                 spin_unlock_irqrestore(&rxq->lock, flags);
1061         }
1062 }
1063
1064 void
1065 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1066 {
1067         unsigned long flags;
1068         int i;
1069         spin_lock_irqsave(&rxq->lock, flags);
1070         INIT_LIST_HEAD(&rxq->rx_free);
1071         INIT_LIST_HEAD(&rxq->rx_used);
1072         /* Fill the rx_used queue with _all_ of the Rx buffers */
1073         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1074                 /* In the reset function, these buffers may have been allocated
1075                  * to an SKB, so we need to unmap and free potential storage */
1076                 if (rxq->pool[i].page != NULL) {
1077                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1078                                        PAGE_SIZE << il->hw_params.rx_page_order,
1079                                        PCI_DMA_FROMDEVICE);
1080                         __il_free_pages(il, rxq->pool[i].page);
1081                         rxq->pool[i].page = NULL;
1082                 }
1083                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1084         }
1085
1086         /* Set us so that we have processed and used all buffers, but have
1087          * not restocked the Rx queue with fresh buffers */
1088         rxq->read = rxq->write = 0;
1089         rxq->write_actual = 0;
1090         rxq->free_count = 0;
1091         spin_unlock_irqrestore(&rxq->lock, flags);
1092 }
1093
1094 void
1095 il3945_rx_replenish(void *data)
1096 {
1097         struct il_priv *il = data;
1098         unsigned long flags;
1099
1100         il3945_rx_allocate(il, GFP_KERNEL);
1101
1102         spin_lock_irqsave(&il->lock, flags);
1103         il3945_rx_queue_restock(il);
1104         spin_unlock_irqrestore(&il->lock, flags);
1105 }
1106
1107 static void
1108 il3945_rx_replenish_now(struct il_priv *il)
1109 {
1110         il3945_rx_allocate(il, GFP_ATOMIC);
1111
1112         il3945_rx_queue_restock(il);
1113 }
1114
1115 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1116  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1117  * This free routine walks the list of POOL entries and if SKB is set to
1118  * non NULL it is unmapped and freed
1119  */
1120 static void
1121 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1122 {
1123         int i;
1124         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1125                 if (rxq->pool[i].page != NULL) {
1126                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1127                                        PAGE_SIZE << il->hw_params.rx_page_order,
1128                                        PCI_DMA_FROMDEVICE);
1129                         __il_free_pages(il, rxq->pool[i].page);
1130                         rxq->pool[i].page = NULL;
1131                 }
1132         }
1133
1134         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1135                           rxq->bd_dma);
1136         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1137                           rxq->rb_stts, rxq->rb_stts_dma);
1138         rxq->bd = NULL;
1139         rxq->rb_stts = NULL;
1140 }
1141
1142 /* Convert linear signal-to-noise ratio into dB */
1143 static u8 ratio2dB[100] = {
1144 /*       0   1   2   3   4   5   6   7   8   9 */
1145         0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
1146         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1147         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1148         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1149         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1150         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1151         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1152         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1153         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1154         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1155 };
1156
1157 /* Calculates a relative dB value from a ratio of linear
1158  *   (i.e. not dB) signal levels.
1159  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1160 int
1161 il3945_calc_db_from_ratio(int sig_ratio)
1162 {
1163         /* 1000:1 or higher just report as 60 dB */
1164         if (sig_ratio >= 1000)
1165                 return 60;
1166
1167         /* 100:1 or higher, divide by 10 and use table,
1168          *   add 20 dB to make up for divide by 10 */
1169         if (sig_ratio >= 100)
1170                 return 20 + (int)ratio2dB[sig_ratio / 10];
1171
1172         /* We shouldn't see this */
1173         if (sig_ratio < 1)
1174                 return 0;
1175
1176         /* Use table for ratios 1:1 - 99:1 */
1177         return (int)ratio2dB[sig_ratio];
1178 }
1179
1180 /**
1181  * il3945_rx_handle - Main entry function for receiving responses from uCode
1182  *
1183  * Uses the il->handlers callback function array to invoke
1184  * the appropriate handlers, including command responses,
1185  * frame-received notifications, and other notifications.
1186  */
1187 static void
1188 il3945_rx_handle(struct il_priv *il)
1189 {
1190         struct il_rx_buf *rxb;
1191         struct il_rx_pkt *pkt;
1192         struct il_rx_queue *rxq = &il->rxq;
1193         u32 r, i;
1194         int reclaim;
1195         unsigned long flags;
1196         u8 fill_rx = 0;
1197         u32 count = 8;
1198         int total_empty = 0;
1199
1200         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1201          * buffer that the driver may process (last buffer filled by ucode). */
1202         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1203         i = rxq->read;
1204
1205         /* calculate total frames need to be restock after handling RX */
1206         total_empty = r - rxq->write_actual;
1207         if (total_empty < 0)
1208                 total_empty += RX_QUEUE_SIZE;
1209
1210         if (total_empty > (RX_QUEUE_SIZE / 2))
1211                 fill_rx = 1;
1212         /* Rx interrupt, but nothing sent from uCode */
1213         if (i == r)
1214                 D_RX("r = %d, i = %d\n", r, i);
1215
1216         while (i != r) {
1217                 int len;
1218
1219                 rxb = rxq->queue[i];
1220
1221                 /* If an RXB doesn't have a Rx queue slot associated with it,
1222                  * then a bug has been introduced in the queue refilling
1223                  * routines -- catch it here */
1224                 BUG_ON(rxb == NULL);
1225
1226                 rxq->queue[i] = NULL;
1227
1228                 pci_unmap_page(il->pci_dev, rxb->page_dma,
1229                                PAGE_SIZE << il->hw_params.rx_page_order,
1230                                PCI_DMA_FROMDEVICE);
1231                 pkt = rxb_addr(rxb);
1232
1233                 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
1234                 len += sizeof(u32);     /* account for status word */
1235
1236                 /* Reclaim a command buffer only if this packet is a response
1237                  *   to a (driver-originated) command.
1238                  * If the packet (e.g. Rx frame) originated from uCode,
1239                  *   there is no command buffer to reclaim.
1240                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1241                  *   but apparently a few don't get set; catch them here. */
1242                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1243                     pkt->hdr.cmd != N_STATS && pkt->hdr.cmd != C_TX;
1244
1245                 /* Based on type of command response or notification,
1246                  *   handle those that need handling via function in
1247                  *   handlers table.  See il3945_setup_handlers() */
1248                 if (il->handlers[pkt->hdr.cmd]) {
1249                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1250                              il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1251                         il->isr_stats.handlers[pkt->hdr.cmd]++;
1252                         il->handlers[pkt->hdr.cmd] (il, rxb);
1253                 } else {
1254                         /* No handling needed */
1255                         D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1256                              i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1257                 }
1258
1259                 /*
1260                  * XXX: After here, we should always check rxb->page
1261                  * against NULL before touching it or its virtual
1262                  * memory (pkt). Because some handler might have
1263                  * already taken or freed the pages.
1264                  */
1265
1266                 if (reclaim) {
1267                         /* Invoke any callbacks, transfer the buffer to caller,
1268                          * and fire off the (possibly) blocking il_send_cmd()
1269                          * as we reclaim the driver command queue */
1270                         if (rxb->page)
1271                                 il_tx_cmd_complete(il, rxb);
1272                         else
1273                                 IL_WARN("Claim null rxb?\n");
1274                 }
1275
1276                 /* Reuse the page if possible. For notification packets and
1277                  * SKBs that fail to Rx correctly, add them back into the
1278                  * rx_free list for reuse later. */
1279                 spin_lock_irqsave(&rxq->lock, flags);
1280                 if (rxb->page != NULL) {
1281                         rxb->page_dma =
1282                             pci_map_page(il->pci_dev, rxb->page, 0,
1283                                          PAGE_SIZE << il->hw_params.
1284                                          rx_page_order, PCI_DMA_FROMDEVICE);
1285                         list_add_tail(&rxb->list, &rxq->rx_free);
1286                         rxq->free_count++;
1287                 } else
1288                         list_add_tail(&rxb->list, &rxq->rx_used);
1289
1290                 spin_unlock_irqrestore(&rxq->lock, flags);
1291
1292                 i = (i + 1) & RX_QUEUE_MASK;
1293                 /* If there are a lot of unused frames,
1294                  * restock the Rx queue so ucode won't assert. */
1295                 if (fill_rx) {
1296                         count++;
1297                         if (count >= 8) {
1298                                 rxq->read = i;
1299                                 il3945_rx_replenish_now(il);
1300                                 count = 0;
1301                         }
1302                 }
1303         }
1304
1305         /* Backtrack one entry */
1306         rxq->read = i;
1307         if (fill_rx)
1308                 il3945_rx_replenish_now(il);
1309         else
1310                 il3945_rx_queue_restock(il);
1311 }
1312
1313 /* call this function to flush any scheduled tasklet */
1314 static inline void
1315 il3945_synchronize_irq(struct il_priv *il)
1316 {
1317         /* wait to make sure we flush pending tasklet */
1318         synchronize_irq(il->pci_dev->irq);
1319         tasklet_kill(&il->irq_tasklet);
1320 }
1321
1322 static const char *
1323 il3945_desc_lookup(int i)
1324 {
1325         switch (i) {
1326         case 1:
1327                 return "FAIL";
1328         case 2:
1329                 return "BAD_PARAM";
1330         case 3:
1331                 return "BAD_CHECKSUM";
1332         case 4:
1333                 return "NMI_INTERRUPT";
1334         case 5:
1335                 return "SYSASSERT";
1336         case 6:
1337                 return "FATAL_ERROR";
1338         }
1339
1340         return "UNKNOWN";
1341 }
1342
1343 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1344 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1345
1346 void
1347 il3945_dump_nic_error_log(struct il_priv *il)
1348 {
1349         u32 i;
1350         u32 desc, time, count, base, data1;
1351         u32 blink1, blink2, ilink1, ilink2;
1352
1353         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1354
1355         if (!il3945_hw_valid_rtc_data_addr(base)) {
1356                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1357                 return;
1358         }
1359
1360         count = il_read_targ_mem(il, base);
1361
1362         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1363                 IL_ERR("Start IWL Error Log Dump:\n");
1364                 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1365         }
1366
1367         IL_ERR("Desc       Time       asrtPC  blink2 "
1368                "ilink1  nmiPC   Line\n");
1369         for (i = ERROR_START_OFFSET;
1370              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1371              i += ERROR_ELEM_SIZE) {
1372                 desc = il_read_targ_mem(il, base + i);
1373                 time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1374                 blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1375                 blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1376                 ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1377                 ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1378                 data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1379
1380                 IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1381                        il3945_desc_lookup(desc), desc, time, blink1, blink2,
1382                        ilink1, ilink2, data1);
1383         }
1384 }
1385
1386 static void
1387 il3945_irq_tasklet(struct il_priv *il)
1388 {
1389         u32 inta, handled = 0;
1390         u32 inta_fh;
1391         unsigned long flags;
1392 #ifdef CONFIG_IWLEGACY_DEBUG
1393         u32 inta_mask;
1394 #endif
1395
1396         spin_lock_irqsave(&il->lock, flags);
1397
1398         /* Ack/clear/reset pending uCode interrupts.
1399          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1400          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1401         inta = _il_rd(il, CSR_INT);
1402         _il_wr(il, CSR_INT, inta);
1403
1404         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1405          * Any new interrupts that happen after this, either while we're
1406          * in this tasklet, or later, will show up in next ISR/tasklet. */
1407         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1408         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1409
1410 #ifdef CONFIG_IWLEGACY_DEBUG
1411         if (il_get_debug_level(il) & IL_DL_ISR) {
1412                 /* just for debug */
1413                 inta_mask = _il_rd(il, CSR_INT_MASK);
1414                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1415                       inta_mask, inta_fh);
1416         }
1417 #endif
1418
1419         spin_unlock_irqrestore(&il->lock, flags);
1420
1421         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1422          * atomic, make sure that inta covers all the interrupts that
1423          * we've discovered, even if FH interrupt came in just after
1424          * reading CSR_INT. */
1425         if (inta_fh & CSR39_FH_INT_RX_MASK)
1426                 inta |= CSR_INT_BIT_FH_RX;
1427         if (inta_fh & CSR39_FH_INT_TX_MASK)
1428                 inta |= CSR_INT_BIT_FH_TX;
1429
1430         /* Now service all interrupt bits discovered above. */
1431         if (inta & CSR_INT_BIT_HW_ERR) {
1432                 IL_ERR("Hardware error detected.  Restarting.\n");
1433
1434                 /* Tell the device to stop sending interrupts */
1435                 il_disable_interrupts(il);
1436
1437                 il->isr_stats.hw++;
1438                 il_irq_handle_error(il);
1439
1440                 handled |= CSR_INT_BIT_HW_ERR;
1441
1442                 return;
1443         }
1444 #ifdef CONFIG_IWLEGACY_DEBUG
1445         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1446                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1447                 if (inta & CSR_INT_BIT_SCD) {
1448                         D_ISR("Scheduler finished to transmit "
1449                               "the frame/frames.\n");
1450                         il->isr_stats.sch++;
1451                 }
1452
1453                 /* Alive notification via Rx interrupt will do the real work */
1454                 if (inta & CSR_INT_BIT_ALIVE) {
1455                         D_ISR("Alive interrupt\n");
1456                         il->isr_stats.alive++;
1457                 }
1458         }
1459 #endif
1460         /* Safely ignore these bits for debug checks below */
1461         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1462
1463         /* Error detected by uCode */
1464         if (inta & CSR_INT_BIT_SW_ERR) {
1465                 IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1466                        inta);
1467                 il->isr_stats.sw++;
1468                 il_irq_handle_error(il);
1469                 handled |= CSR_INT_BIT_SW_ERR;
1470         }
1471
1472         /* uCode wakes up after power-down sleep */
1473         if (inta & CSR_INT_BIT_WAKEUP) {
1474                 D_ISR("Wakeup interrupt\n");
1475                 il_rx_queue_update_write_ptr(il, &il->rxq);
1476                 il_txq_update_write_ptr(il, &il->txq[0]);
1477                 il_txq_update_write_ptr(il, &il->txq[1]);
1478                 il_txq_update_write_ptr(il, &il->txq[2]);
1479                 il_txq_update_write_ptr(il, &il->txq[3]);
1480                 il_txq_update_write_ptr(il, &il->txq[4]);
1481                 il_txq_update_write_ptr(il, &il->txq[5]);
1482
1483                 il->isr_stats.wakeup++;
1484                 handled |= CSR_INT_BIT_WAKEUP;
1485         }
1486
1487         /* All uCode command responses, including Tx command responses,
1488          * Rx "responses" (frame-received notification), and other
1489          * notifications from uCode come through here*/
1490         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1491                 il3945_rx_handle(il);
1492                 il->isr_stats.rx++;
1493                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1494         }
1495
1496         if (inta & CSR_INT_BIT_FH_TX) {
1497                 D_ISR("Tx interrupt\n");
1498                 il->isr_stats.tx++;
1499
1500                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1501                 il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1502                 handled |= CSR_INT_BIT_FH_TX;
1503         }
1504
1505         if (inta & ~handled) {
1506                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1507                 il->isr_stats.unhandled++;
1508         }
1509
1510         if (inta & ~il->inta_mask) {
1511                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1512                         inta & ~il->inta_mask);
1513                 IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
1514         }
1515
1516         /* Re-enable all interrupts */
1517         /* only Re-enable if disabled by irq */
1518         if (test_bit(S_INT_ENABLED, &il->status))
1519                 il_enable_interrupts(il);
1520
1521 #ifdef CONFIG_IWLEGACY_DEBUG
1522         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1523                 inta = _il_rd(il, CSR_INT);
1524                 inta_mask = _il_rd(il, CSR_INT_MASK);
1525                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1526                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1527                       "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1528         }
1529 #endif
1530 }
1531
1532 static int
1533 il3945_get_channels_for_scan(struct il_priv *il, enum ieee80211_band band,
1534                              u8 is_active, u8 n_probes,
1535                              struct il3945_scan_channel *scan_ch,
1536                              struct ieee80211_vif *vif)
1537 {
1538         struct ieee80211_channel *chan;
1539         const struct ieee80211_supported_band *sband;
1540         const struct il_channel_info *ch_info;
1541         u16 passive_dwell = 0;
1542         u16 active_dwell = 0;
1543         int added, i;
1544
1545         sband = il_get_hw_mode(il, band);
1546         if (!sband)
1547                 return 0;
1548
1549         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1550         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1551
1552         if (passive_dwell <= active_dwell)
1553                 passive_dwell = active_dwell + 1;
1554
1555         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1556                 chan = il->scan_request->channels[i];
1557
1558                 if (chan->band != band)
1559                         continue;
1560
1561                 scan_ch->channel = chan->hw_value;
1562
1563                 ch_info = il_get_channel_info(il, band, scan_ch->channel);
1564                 if (!il_is_channel_valid(ch_info)) {
1565                         D_SCAN("Channel %d is INVALID for this band.\n",
1566                                scan_ch->channel);
1567                         continue;
1568                 }
1569
1570                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1571                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1572                 /* If passive , set up for auto-switch
1573                  *  and use long active_dwell time.
1574                  */
1575                 if (!is_active || il_is_channel_passive(ch_info) ||
1576                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1577                         scan_ch->type = 0;      /* passive */
1578                         if (IL_UCODE_API(il->ucode_ver) == 1)
1579                                 scan_ch->active_dwell =
1580                                     cpu_to_le16(passive_dwell - 1);
1581                 } else {
1582                         scan_ch->type = 1;      /* active */
1583                 }
1584
1585                 /* Set direct probe bits. These may be used both for active
1586                  * scan channels (probes gets sent right away),
1587                  * or for passive channels (probes get se sent only after
1588                  * hearing clear Rx packet).*/
1589                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1590                         if (n_probes)
1591                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1592                 } else {
1593                         /* uCode v1 does not allow setting direct probe bits on
1594                          * passive channel. */
1595                         if ((scan_ch->type & 1) && n_probes)
1596                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1597                 }
1598
1599                 /* Set txpower levels to defaults */
1600                 scan_ch->tpc.dsp_atten = 110;
1601                 /* scan_pwr_info->tpc.dsp_atten; */
1602
1603                 /*scan_pwr_info->tpc.tx_gain; */
1604                 if (band == IEEE80211_BAND_5GHZ)
1605                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1606                 else {
1607                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1608                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1609                          * power level:
1610                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1611                          */
1612                 }
1613
1614                 D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1615                        (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1616                        (scan_ch->type & 1) ? active_dwell : passive_dwell);
1617
1618                 scan_ch++;
1619                 added++;
1620         }
1621
1622         D_SCAN("total channels to scan %d\n", added);
1623         return added;
1624 }
1625
1626 static void
1627 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1628 {
1629         int i;
1630
1631         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1632                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1633                 rates[i].hw_value = i;  /* Rate scaling will work on idxes */
1634                 rates[i].hw_value_short = i;
1635                 rates[i].flags = 0;
1636                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1637                         /*
1638                          * If CCK != 1M then set short preamble rate flag.
1639                          */
1640                         rates[i].flags |=
1641                             (il3945_rates[i].plcp ==
1642                              10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1643                 }
1644         }
1645 }
1646
1647 /******************************************************************************
1648  *
1649  * uCode download functions
1650  *
1651  ******************************************************************************/
1652
1653 static void
1654 il3945_dealloc_ucode_pci(struct il_priv *il)
1655 {
1656         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1657         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1658         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1659         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1660         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1661         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1662 }
1663
1664 /**
1665  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1666  *     looking at all data.
1667  */
1668 static int
1669 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1670 {
1671         u32 val;
1672         u32 save_len = len;
1673         int rc = 0;
1674         u32 errcnt;
1675
1676         D_INFO("ucode inst image size is %u\n", len);
1677
1678         il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1679
1680         errcnt = 0;
1681         for (; len > 0; len -= sizeof(u32), image++) {
1682                 /* read data comes through single port, auto-incr addr */
1683                 /* NOTE: Use the debugless read so we don't flood kernel log
1684                  * if IL_DL_IO is set */
1685                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1686                 if (val != le32_to_cpu(*image)) {
1687                         IL_ERR("uCode INST section is invalid at "
1688                                "offset 0x%x, is 0x%x, s/b 0x%x\n",
1689                                save_len - len, val, le32_to_cpu(*image));
1690                         rc = -EIO;
1691                         errcnt++;
1692                         if (errcnt >= 20)
1693                                 break;
1694                 }
1695         }
1696
1697         if (!errcnt)
1698                 D_INFO("ucode image in INSTRUCTION memory is good\n");
1699
1700         return rc;
1701 }
1702
1703 /**
1704  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1705  *   using sample data 100 bytes apart.  If these sample points are good,
1706  *   it's a pretty good bet that everything between them is good, too.
1707  */
1708 static int
1709 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1710 {
1711         u32 val;
1712         int rc = 0;
1713         u32 errcnt = 0;
1714         u32 i;
1715
1716         D_INFO("ucode inst image size is %u\n", len);
1717
1718         for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1719                 /* read data comes through single port, auto-incr addr */
1720                 /* NOTE: Use the debugless read so we don't flood kernel log
1721                  * if IL_DL_IO is set */
1722                 il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1723                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1724                 if (val != le32_to_cpu(*image)) {
1725 #if 0                           /* Enable this if you want to see details */
1726                         IL_ERR("uCode INST section is invalid at "
1727                                "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1728                                *image);
1729 #endif
1730                         rc = -EIO;
1731                         errcnt++;
1732                         if (errcnt >= 3)
1733                                 break;
1734                 }
1735         }
1736
1737         return rc;
1738 }
1739
1740 /**
1741  * il3945_verify_ucode - determine which instruction image is in SRAM,
1742  *    and verify its contents
1743  */
1744 static int
1745 il3945_verify_ucode(struct il_priv *il)
1746 {
1747         __le32 *image;
1748         u32 len;
1749         int rc = 0;
1750
1751         /* Try bootstrap */
1752         image = (__le32 *) il->ucode_boot.v_addr;
1753         len = il->ucode_boot.len;
1754         rc = il3945_verify_inst_sparse(il, image, len);
1755         if (rc == 0) {
1756                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1757                 return 0;
1758         }
1759
1760         /* Try initialize */
1761         image = (__le32 *) il->ucode_init.v_addr;
1762         len = il->ucode_init.len;
1763         rc = il3945_verify_inst_sparse(il, image, len);
1764         if (rc == 0) {
1765                 D_INFO("Initialize uCode is good in inst SRAM\n");
1766                 return 0;
1767         }
1768
1769         /* Try runtime/protocol */
1770         image = (__le32 *) il->ucode_code.v_addr;
1771         len = il->ucode_code.len;
1772         rc = il3945_verify_inst_sparse(il, image, len);
1773         if (rc == 0) {
1774                 D_INFO("Runtime uCode is good in inst SRAM\n");
1775                 return 0;
1776         }
1777
1778         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1779
1780         /* Since nothing seems to match, show first several data entries in
1781          * instruction SRAM, so maybe visual inspection will give a clue.
1782          * Selection of bootstrap image (vs. other images) is arbitrary. */
1783         image = (__le32 *) il->ucode_boot.v_addr;
1784         len = il->ucode_boot.len;
1785         rc = il3945_verify_inst_full(il, image, len);
1786
1787         return rc;
1788 }
1789
1790 static void
1791 il3945_nic_start(struct il_priv *il)
1792 {
1793         /* Remove all resets to allow NIC to operate */
1794         _il_wr(il, CSR_RESET, 0);
1795 }
1796
1797 #define IL3945_UCODE_GET(item)                                          \
1798 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1799 {                                                                       \
1800         return le32_to_cpu(ucode->v1.item);                             \
1801 }
1802
1803 static u32
1804 il3945_ucode_get_header_size(u32 api_ver)
1805 {
1806         return 24;
1807 }
1808
1809 static u8 *
1810 il3945_ucode_get_data(const struct il_ucode_header *ucode)
1811 {
1812         return (u8 *) ucode->v1.data;
1813 }
1814
1815 IL3945_UCODE_GET(inst_size);
1816 IL3945_UCODE_GET(data_size);
1817 IL3945_UCODE_GET(init_size);
1818 IL3945_UCODE_GET(init_data_size);
1819 IL3945_UCODE_GET(boot_size);
1820
1821 /**
1822  * il3945_read_ucode - Read uCode images from disk file.
1823  *
1824  * Copy into buffers for card to fetch via bus-mastering
1825  */
1826 static int
1827 il3945_read_ucode(struct il_priv *il)
1828 {
1829         const struct il_ucode_header *ucode;
1830         int ret = -EINVAL, idx;
1831         const struct firmware *ucode_raw;
1832         /* firmware file name contains uCode/driver compatibility version */
1833         const char *name_pre = il->cfg->fw_name_pre;
1834         const unsigned int api_max = il->cfg->ucode_api_max;
1835         const unsigned int api_min = il->cfg->ucode_api_min;
1836         char buf[25];
1837         u8 *src;
1838         size_t len;
1839         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1840
1841         /* Ask kernel firmware_class module to get the boot firmware off disk.
1842          * request_firmware() is synchronous, file is in memory on return. */
1843         for (idx = api_max; idx >= api_min; idx--) {
1844                 sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1845                 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1846                 if (ret < 0) {
1847                         IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1848                         if (ret == -ENOENT)
1849                                 continue;
1850                         else
1851                                 goto error;
1852                 } else {
1853                         if (idx < api_max)
1854                                 IL_ERR("Loaded firmware %s, "
1855                                        "which is deprecated. "
1856                                        " Please use API v%u instead.\n", buf,
1857                                        api_max);
1858                         D_INFO("Got firmware '%s' file "
1859                                "(%zd bytes) from disk\n", buf, ucode_raw->size);
1860                         break;
1861                 }
1862         }
1863
1864         if (ret < 0)
1865                 goto error;
1866
1867         /* Make sure that we got at least our header! */
1868         if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1869                 IL_ERR("File size way too small!\n");
1870                 ret = -EINVAL;
1871                 goto err_release;
1872         }
1873
1874         /* Data from ucode file:  header followed by uCode images */
1875         ucode = (struct il_ucode_header *)ucode_raw->data;
1876
1877         il->ucode_ver = le32_to_cpu(ucode->ver);
1878         api_ver = IL_UCODE_API(il->ucode_ver);
1879         inst_size = il3945_ucode_get_inst_size(ucode);
1880         data_size = il3945_ucode_get_data_size(ucode);
1881         init_size = il3945_ucode_get_init_size(ucode);
1882         init_data_size = il3945_ucode_get_init_data_size(ucode);
1883         boot_size = il3945_ucode_get_boot_size(ucode);
1884         src = il3945_ucode_get_data(ucode);
1885
1886         /* api_ver should match the api version forming part of the
1887          * firmware filename ... but we don't check for that and only rely
1888          * on the API version read from firmware header from here on forward */
1889
1890         if (api_ver < api_min || api_ver > api_max) {
1891                 IL_ERR("Driver unable to support your firmware API. "
1892                        "Driver supports v%u, firmware is v%u.\n", api_max,
1893                        api_ver);
1894                 il->ucode_ver = 0;
1895                 ret = -EINVAL;
1896                 goto err_release;
1897         }
1898         if (api_ver != api_max)
1899                 IL_ERR("Firmware has old API version. Expected %u, "
1900                        "got %u. New firmware can be obtained "
1901                        "from http://www.intellinuxwireless.org.\n", api_max,
1902                        api_ver);
1903
1904         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1905                 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1906                 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1907
1908         snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1909                  "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1910                  IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1911                  IL_UCODE_SERIAL(il->ucode_ver));
1912
1913         D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1914         D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1915         D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1916         D_INFO("f/w package hdr init inst size = %u\n", init_size);
1917         D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1918         D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1919
1920         /* Verify size of file vs. image size info in file's header */
1921         if (ucode_raw->size !=
1922             il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1923             init_size + init_data_size + boot_size) {
1924
1925                 D_INFO("uCode file size %zd does not match expected size\n",
1926                        ucode_raw->size);
1927                 ret = -EINVAL;
1928                 goto err_release;
1929         }
1930
1931         /* Verify that uCode images will fit in card's SRAM */
1932         if (inst_size > IL39_MAX_INST_SIZE) {
1933                 D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1934                 ret = -EINVAL;
1935                 goto err_release;
1936         }
1937
1938         if (data_size > IL39_MAX_DATA_SIZE) {
1939                 D_INFO("uCode data len %d too large to fit in\n", data_size);
1940                 ret = -EINVAL;
1941                 goto err_release;
1942         }
1943         if (init_size > IL39_MAX_INST_SIZE) {
1944                 D_INFO("uCode init instr len %d too large to fit in\n",
1945                        init_size);
1946                 ret = -EINVAL;
1947                 goto err_release;
1948         }
1949         if (init_data_size > IL39_MAX_DATA_SIZE) {
1950                 D_INFO("uCode init data len %d too large to fit in\n",
1951                        init_data_size);
1952                 ret = -EINVAL;
1953                 goto err_release;
1954         }
1955         if (boot_size > IL39_MAX_BSM_SIZE) {
1956                 D_INFO("uCode boot instr len %d too large to fit in\n",
1957                        boot_size);
1958                 ret = -EINVAL;
1959                 goto err_release;
1960         }
1961
1962         /* Allocate ucode buffers for card's bus-master loading ... */
1963
1964         /* Runtime instructions and 2 copies of data:
1965          * 1) unmodified from disk
1966          * 2) backup cache for save/restore during power-downs */
1967         il->ucode_code.len = inst_size;
1968         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1969
1970         il->ucode_data.len = data_size;
1971         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1972
1973         il->ucode_data_backup.len = data_size;
1974         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1975
1976         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1977             !il->ucode_data_backup.v_addr)
1978                 goto err_pci_alloc;
1979
1980         /* Initialization instructions and data */
1981         if (init_size && init_data_size) {
1982                 il->ucode_init.len = init_size;
1983                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
1984
1985                 il->ucode_init_data.len = init_data_size;
1986                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
1987
1988                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
1989                         goto err_pci_alloc;
1990         }
1991
1992         /* Bootstrap (instructions only, no data) */
1993         if (boot_size) {
1994                 il->ucode_boot.len = boot_size;
1995                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
1996
1997                 if (!il->ucode_boot.v_addr)
1998                         goto err_pci_alloc;
1999         }
2000
2001         /* Copy images into buffers for card's bus-master reads ... */
2002
2003         /* Runtime instructions (first block of data in file) */
2004         len = inst_size;
2005         D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
2006         memcpy(il->ucode_code.v_addr, src, len);
2007         src += len;
2008
2009         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2010                il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
2011
2012         /* Runtime data (2nd block)
2013          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2014         len = data_size;
2015         D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2016         memcpy(il->ucode_data.v_addr, src, len);
2017         memcpy(il->ucode_data_backup.v_addr, src, len);
2018         src += len;
2019
2020         /* Initialization instructions (3rd block) */
2021         if (init_size) {
2022                 len = init_size;
2023                 D_INFO("Copying (but not loading) init instr len %zd\n", len);
2024                 memcpy(il->ucode_init.v_addr, src, len);
2025                 src += len;
2026         }
2027
2028         /* Initialization data (4th block) */
2029         if (init_data_size) {
2030                 len = init_data_size;
2031                 D_INFO("Copying (but not loading) init data len %zd\n", len);
2032                 memcpy(il->ucode_init_data.v_addr, src, len);
2033                 src += len;
2034         }
2035
2036         /* Bootstrap instructions (5th block) */
2037         len = boot_size;
2038         D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2039         memcpy(il->ucode_boot.v_addr, src, len);
2040
2041         /* We have our copies now, allow OS release its copies */
2042         release_firmware(ucode_raw);
2043         return 0;
2044
2045 err_pci_alloc:
2046         IL_ERR("failed to allocate pci memory\n");
2047         ret = -ENOMEM;
2048         il3945_dealloc_ucode_pci(il);
2049
2050 err_release:
2051         release_firmware(ucode_raw);
2052
2053 error:
2054         return ret;
2055 }
2056
2057 /**
2058  * il3945_set_ucode_ptrs - Set uCode address location
2059  *
2060  * Tell initialization uCode where to find runtime uCode.
2061  *
2062  * BSM registers initially contain pointers to initialization uCode.
2063  * We need to replace them to load runtime uCode inst and data,
2064  * and to save runtime data when powering down.
2065  */
2066 static int
2067 il3945_set_ucode_ptrs(struct il_priv *il)
2068 {
2069         dma_addr_t pinst;
2070         dma_addr_t pdata;
2071
2072         /* bits 31:0 for 3945 */
2073         pinst = il->ucode_code.p_addr;
2074         pdata = il->ucode_data_backup.p_addr;
2075
2076         /* Tell bootstrap uCode where to find image to load */
2077         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2078         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2079         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2080
2081         /* Inst byte count must be last to set up, bit 31 signals uCode
2082          *   that all new ptr/size info is in place */
2083         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2084                    il->ucode_code.len | BSM_DRAM_INST_LOAD);
2085
2086         D_INFO("Runtime uCode pointers are set.\n");
2087
2088         return 0;
2089 }
2090
2091 /**
2092  * il3945_init_alive_start - Called after N_ALIVE notification received
2093  *
2094  * Called after N_ALIVE notification received from "initialize" uCode.
2095  *
2096  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2097  */
2098 static void
2099 il3945_init_alive_start(struct il_priv *il)
2100 {
2101         /* Check alive response for "valid" sign from uCode */
2102         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2103                 /* We had an error bringing up the hardware, so take it
2104                  * all the way back down so we can try again */
2105                 D_INFO("Initialize Alive failed.\n");
2106                 goto restart;
2107         }
2108
2109         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2110          * This is a paranoid check, because we would not have gotten the
2111          * "initialize" alive if code weren't properly loaded.  */
2112         if (il3945_verify_ucode(il)) {
2113                 /* Runtime instruction load was bad;
2114                  * take it all the way back down so we can try again */
2115                 D_INFO("Bad \"initialize\" uCode load.\n");
2116                 goto restart;
2117         }
2118
2119         /* Send pointers to protocol/runtime uCode image ... init code will
2120          * load and launch runtime uCode, which will send us another "Alive"
2121          * notification. */
2122         D_INFO("Initialization Alive received.\n");
2123         if (il3945_set_ucode_ptrs(il)) {
2124                 /* Runtime instruction load won't happen;
2125                  * take it all the way back down so we can try again */
2126                 D_INFO("Couldn't set up uCode pointers.\n");
2127                 goto restart;
2128         }
2129         return;
2130
2131 restart:
2132         queue_work(il->workqueue, &il->restart);
2133 }
2134
2135 /**
2136  * il3945_alive_start - called after N_ALIVE notification received
2137  *                   from protocol/runtime uCode (initialization uCode's
2138  *                   Alive gets handled by il3945_init_alive_start()).
2139  */
2140 static void
2141 il3945_alive_start(struct il_priv *il)
2142 {
2143         int thermal_spin = 0;
2144         u32 rfkill;
2145
2146         D_INFO("Runtime Alive received.\n");
2147
2148         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2149                 /* We had an error bringing up the hardware, so take it
2150                  * all the way back down so we can try again */
2151                 D_INFO("Alive failed.\n");
2152                 goto restart;
2153         }
2154
2155         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2156          * This is a paranoid check, because we would not have gotten the
2157          * "runtime" alive if code weren't properly loaded.  */
2158         if (il3945_verify_ucode(il)) {
2159                 /* Runtime instruction load was bad;
2160                  * take it all the way back down so we can try again */
2161                 D_INFO("Bad runtime uCode load.\n");
2162                 goto restart;
2163         }
2164
2165         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2166         D_INFO("RFKILL status: 0x%x\n", rfkill);
2167
2168         if (rfkill & 0x1) {
2169                 clear_bit(S_RFKILL, &il->status);
2170                 /* if RFKILL is not on, then wait for thermal
2171                  * sensor in adapter to kick in */
2172                 while (il3945_hw_get_temperature(il) == 0) {
2173                         thermal_spin++;
2174                         udelay(10);
2175                 }
2176
2177                 if (thermal_spin)
2178                         D_INFO("Thermal calibration took %dus\n",
2179                                thermal_spin * 10);
2180         } else
2181                 set_bit(S_RFKILL, &il->status);
2182
2183         /* After the ALIVE response, we can send commands to 3945 uCode */
2184         set_bit(S_ALIVE, &il->status);
2185
2186         /* Enable watchdog to monitor the driver tx queues */
2187         il_setup_watchdog(il);
2188
2189         if (il_is_rfkill(il))
2190                 return;
2191
2192         ieee80211_wake_queues(il->hw);
2193
2194         il->active_rate = RATES_MASK_3945;
2195
2196         il_power_update_mode(il, true);
2197
2198         if (il_is_associated(il)) {
2199                 struct il3945_rxon_cmd *active_rxon =
2200                     (struct il3945_rxon_cmd *)(&il->active);
2201
2202                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2203                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2204         } else {
2205                 /* Initialize our rx_config data */
2206                 il_connection_init_rx_config(il);
2207         }
2208
2209         /* Configure Bluetooth device coexistence support */
2210         il_send_bt_config(il);
2211
2212         set_bit(S_READY, &il->status);
2213
2214         /* Configure the adapter for unassociated operation */
2215         il3945_commit_rxon(il);
2216
2217         il3945_reg_txpower_periodic(il);
2218
2219         D_INFO("ALIVE processing complete.\n");
2220         wake_up(&il->wait_command_queue);
2221
2222         return;
2223
2224 restart:
2225         queue_work(il->workqueue, &il->restart);
2226 }
2227
2228 static void il3945_cancel_deferred_work(struct il_priv *il);
2229
2230 static void
2231 __il3945_down(struct il_priv *il)
2232 {
2233         unsigned long flags;
2234         int exit_pending;
2235
2236         D_INFO(DRV_NAME " is going down\n");
2237
2238         il_scan_cancel_timeout(il, 200);
2239
2240         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2241
2242         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2243          * to prevent rearm timer */
2244         del_timer_sync(&il->watchdog);
2245
2246         /* Station information will now be cleared in device */
2247         il_clear_ucode_stations(il);
2248         il_dealloc_bcast_stations(il);
2249         il_clear_driver_stations(il);
2250
2251         /* Unblock any waiting calls */
2252         wake_up_all(&il->wait_command_queue);
2253
2254         /* Wipe out the EXIT_PENDING status bit if we are not actually
2255          * exiting the module */
2256         if (!exit_pending)
2257                 clear_bit(S_EXIT_PENDING, &il->status);
2258
2259         /* stop and reset the on-board processor */
2260         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2261
2262         /* tell the device to stop sending interrupts */
2263         spin_lock_irqsave(&il->lock, flags);
2264         il_disable_interrupts(il);
2265         spin_unlock_irqrestore(&il->lock, flags);
2266         il3945_synchronize_irq(il);
2267
2268         if (il->mac80211_registered)
2269                 ieee80211_stop_queues(il->hw);
2270
2271         /* If we have not previously called il3945_init() then
2272          * clear all bits but the RF Kill bits and return */
2273         if (!il_is_init(il)) {
2274                 il->status =
2275                     test_bit(S_RFKILL, &il->status) << S_RFKILL |
2276                     test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2277                     test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2278                 goto exit;
2279         }
2280
2281         /* ...otherwise clear out all the status bits but the RF Kill
2282          * bit and continue taking the NIC down. */
2283         il->status &=
2284             test_bit(S_RFKILL, &il->status) << S_RFKILL |
2285             test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2286             test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
2287             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2288
2289         /*
2290          * We disabled and synchronized interrupt, and priv->mutex is taken, so
2291          * here is the only thread which will program device registers, but
2292          * still have lockdep assertions, so we are taking reg_lock.
2293          */
2294         spin_lock_irq(&il->reg_lock);
2295         /* FIXME: il_grab_nic_access if rfkill is off ? */
2296
2297         il3945_hw_txq_ctx_stop(il);
2298         il3945_hw_rxq_stop(il);
2299         /* Power-down device's busmaster DMA clocks */
2300         _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2301         udelay(5);
2302         /* Stop the device, and put it in low power state */
2303         _il_apm_stop(il);
2304
2305         spin_unlock_irq(&il->reg_lock);
2306
2307         il3945_hw_txq_ctx_free(il);
2308 exit:
2309         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2310
2311         if (il->beacon_skb)
2312                 dev_kfree_skb(il->beacon_skb);
2313         il->beacon_skb = NULL;
2314
2315         /* clear out any free frames */
2316         il3945_clear_free_frames(il);
2317 }
2318
2319 static void
2320 il3945_down(struct il_priv *il)
2321 {
2322         mutex_lock(&il->mutex);
2323         __il3945_down(il);
2324         mutex_unlock(&il->mutex);
2325
2326         il3945_cancel_deferred_work(il);
2327 }
2328
2329 #define MAX_HW_RESTARTS 5
2330
2331 static int
2332 il3945_alloc_bcast_station(struct il_priv *il)
2333 {
2334         unsigned long flags;
2335         u8 sta_id;
2336
2337         spin_lock_irqsave(&il->sta_lock, flags);
2338         sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2339         if (sta_id == IL_INVALID_STATION) {
2340                 IL_ERR("Unable to prepare broadcast station\n");
2341                 spin_unlock_irqrestore(&il->sta_lock, flags);
2342
2343                 return -EINVAL;
2344         }
2345
2346         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2347         il->stations[sta_id].used |= IL_STA_BCAST;
2348         spin_unlock_irqrestore(&il->sta_lock, flags);
2349
2350         return 0;
2351 }
2352
2353 static int
2354 __il3945_up(struct il_priv *il)
2355 {
2356         int rc, i;
2357
2358         rc = il3945_alloc_bcast_station(il);
2359         if (rc)
2360                 return rc;
2361
2362         if (test_bit(S_EXIT_PENDING, &il->status)) {
2363                 IL_WARN("Exit pending; will not bring the NIC up\n");
2364                 return -EIO;
2365         }
2366
2367         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2368                 IL_ERR("ucode not available for device bring up\n");
2369                 return -EIO;
2370         }
2371
2372         /* If platform's RF_KILL switch is NOT set to KILL */
2373         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2374                 clear_bit(S_RFKILL, &il->status);
2375         else {
2376                 set_bit(S_RFKILL, &il->status);
2377                 IL_WARN("Radio disabled by HW RF Kill switch\n");
2378                 return -ENODEV;
2379         }
2380
2381         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2382
2383         rc = il3945_hw_nic_init(il);
2384         if (rc) {
2385                 IL_ERR("Unable to int nic\n");
2386                 return rc;
2387         }
2388
2389         /* make sure rfkill handshake bits are cleared */
2390         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2391         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2392
2393         /* clear (again), then enable host interrupts */
2394         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2395         il_enable_interrupts(il);
2396
2397         /* really make sure rfkill handshake bits are cleared */
2398         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2399         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2400
2401         /* Copy original ucode data image from disk into backup cache.
2402          * This will be used to initialize the on-board processor's
2403          * data SRAM for a clean start when the runtime program first loads. */
2404         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2405                il->ucode_data.len);
2406
2407         /* We return success when we resume from suspend and rf_kill is on. */
2408         if (test_bit(S_RFKILL, &il->status))
2409                 return 0;
2410
2411         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2412
2413                 /* load bootstrap state machine,
2414                  * load bootstrap program into processor's memory,
2415                  * prepare to load the "initialize" uCode */
2416                 rc = il->ops->load_ucode(il);
2417
2418                 if (rc) {
2419                         IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2420                         continue;
2421                 }
2422
2423                 /* start card; "initialize" will load runtime ucode */
2424                 il3945_nic_start(il);
2425
2426                 D_INFO(DRV_NAME " is coming up\n");
2427
2428                 return 0;
2429         }
2430
2431         set_bit(S_EXIT_PENDING, &il->status);
2432         __il3945_down(il);
2433         clear_bit(S_EXIT_PENDING, &il->status);
2434
2435         /* tried to restart and config the device for as long as our
2436          * patience could withstand */
2437         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2438         return -EIO;
2439 }
2440
2441 /*****************************************************************************
2442  *
2443  * Workqueue callbacks
2444  *
2445  *****************************************************************************/
2446
2447 static void
2448 il3945_bg_init_alive_start(struct work_struct *data)
2449 {
2450         struct il_priv *il =
2451             container_of(data, struct il_priv, init_alive_start.work);
2452
2453         mutex_lock(&il->mutex);
2454         if (test_bit(S_EXIT_PENDING, &il->status))
2455                 goto out;
2456
2457         il3945_init_alive_start(il);
2458 out:
2459         mutex_unlock(&il->mutex);
2460 }
2461
2462 static void
2463 il3945_bg_alive_start(struct work_struct *data)
2464 {
2465         struct il_priv *il =
2466             container_of(data, struct il_priv, alive_start.work);
2467
2468         mutex_lock(&il->mutex);
2469         if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2470                 goto out;
2471
2472         il3945_alive_start(il);
2473 out:
2474         mutex_unlock(&il->mutex);
2475 }
2476
2477 /*
2478  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2479  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2480  * *is* readable even when device has been SW_RESET into low power mode
2481  * (e.g. during RF KILL).
2482  */
2483 static void
2484 il3945_rfkill_poll(struct work_struct *data)
2485 {
2486         struct il_priv *il =
2487             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2488         bool old_rfkill = test_bit(S_RFKILL, &il->status);
2489         bool new_rfkill =
2490             !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2491
2492         if (new_rfkill != old_rfkill) {
2493                 if (new_rfkill)
2494                         set_bit(S_RFKILL, &il->status);
2495                 else
2496                         clear_bit(S_RFKILL, &il->status);
2497
2498                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2499
2500                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2501                           new_rfkill ? "disable radio" : "enable radio");
2502         }
2503
2504         /* Keep this running, even if radio now enabled.  This will be
2505          * cancelled in mac_start() if system decides to start again */
2506         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2507                            round_jiffies_relative(2 * HZ));
2508
2509 }
2510
2511 int
2512 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2513 {
2514         struct il_host_cmd cmd = {
2515                 .id = C_SCAN,
2516                 .len = sizeof(struct il3945_scan_cmd),
2517                 .flags = CMD_SIZE_HUGE,
2518         };
2519         struct il3945_scan_cmd *scan;
2520         u8 n_probes = 0;
2521         enum ieee80211_band band;
2522         bool is_active = false;
2523         int ret;
2524         u16 len;
2525
2526         lockdep_assert_held(&il->mutex);
2527
2528         if (!il->scan_cmd) {
2529                 il->scan_cmd =
2530                     kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2531                             GFP_KERNEL);
2532                 if (!il->scan_cmd) {
2533                         D_SCAN("Fail to allocate scan memory\n");
2534                         return -ENOMEM;
2535                 }
2536         }
2537         scan = il->scan_cmd;
2538         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2539
2540         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2541         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2542
2543         if (il_is_associated(il)) {
2544                 u16 interval;
2545                 u32 extra;
2546                 u32 suspend_time = 100;
2547                 u32 scan_suspend_time = 100;
2548
2549                 D_INFO("Scanning while associated...\n");
2550
2551                 interval = vif->bss_conf.beacon_int;
2552
2553                 scan->suspend_time = 0;
2554                 scan->max_out_time = cpu_to_le32(200 * 1024);
2555                 if (!interval)
2556                         interval = suspend_time;
2557                 /*
2558                  * suspend time format:
2559                  *  0-19: beacon interval in usec (time before exec.)
2560                  * 20-23: 0
2561                  * 24-31: number of beacons (suspend between channels)
2562                  */
2563
2564                 extra = (suspend_time / interval) << 24;
2565                 scan_suspend_time =
2566                     0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2567
2568                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2569                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2570                        scan_suspend_time, interval);
2571         }
2572
2573         if (il->scan_request->n_ssids) {
2574                 int i, p = 0;
2575                 D_SCAN("Kicking off active scan\n");
2576                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2577                         /* always does wildcard anyway */
2578                         if (!il->scan_request->ssids[i].ssid_len)
2579                                 continue;
2580                         scan->direct_scan[p].id = WLAN_EID_SSID;
2581                         scan->direct_scan[p].len =
2582                             il->scan_request->ssids[i].ssid_len;
2583                         memcpy(scan->direct_scan[p].ssid,
2584                                il->scan_request->ssids[i].ssid,
2585                                il->scan_request->ssids[i].ssid_len);
2586                         n_probes++;
2587                         p++;
2588                 }
2589                 is_active = true;
2590         } else
2591                 D_SCAN("Kicking off passive scan.\n");
2592
2593         /* We don't build a direct scan probe request; the uCode will do
2594          * that based on the direct_mask added to each channel entry */
2595         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2596         scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2597         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2598
2599         /* flags + rate selection */
2600
2601         switch (il->scan_band) {
2602         case IEEE80211_BAND_2GHZ:
2603                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2604                 scan->tx_cmd.rate = RATE_1M_PLCP;
2605                 band = IEEE80211_BAND_2GHZ;
2606                 break;
2607         case IEEE80211_BAND_5GHZ:
2608                 scan->tx_cmd.rate = RATE_6M_PLCP;
2609                 band = IEEE80211_BAND_5GHZ;
2610                 break;
2611         default:
2612                 IL_WARN("Invalid scan band\n");
2613                 return -EIO;
2614         }
2615
2616         /*
2617          * If active scaning is requested but a certain channel is marked
2618          * passive, we can do active scanning if we detect transmissions. For
2619          * passive only scanning disable switching to active on any channel.
2620          */
2621         scan->good_CRC_th =
2622             is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2623
2624         len =
2625             il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2626                               vif->addr, il->scan_request->ie,
2627                               il->scan_request->ie_len,
2628                               IL_MAX_SCAN_SIZE - sizeof(*scan));
2629         scan->tx_cmd.len = cpu_to_le16(len);
2630
2631         /* select Rx antennas */
2632         scan->flags |= il3945_get_antenna_flags(il);
2633
2634         scan->channel_count =
2635             il3945_get_channels_for_scan(il, band, is_active, n_probes,
2636                                          (void *)&scan->data[len], vif);
2637         if (scan->channel_count == 0) {
2638                 D_SCAN("channel count %d\n", scan->channel_count);
2639                 return -EIO;
2640         }
2641
2642         cmd.len +=
2643             le16_to_cpu(scan->tx_cmd.len) +
2644             scan->channel_count * sizeof(struct il3945_scan_channel);
2645         cmd.data = scan;
2646         scan->len = cpu_to_le16(cmd.len);
2647
2648         set_bit(S_SCAN_HW, &il->status);
2649         ret = il_send_cmd_sync(il, &cmd);
2650         if (ret)
2651                 clear_bit(S_SCAN_HW, &il->status);
2652         return ret;
2653 }
2654
2655 void
2656 il3945_post_scan(struct il_priv *il)
2657 {
2658         /*
2659          * Since setting the RXON may have been deferred while
2660          * performing the scan, fire one off if needed
2661          */
2662         if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2663                 il3945_commit_rxon(il);
2664 }
2665
2666 static void
2667 il3945_bg_restart(struct work_struct *data)
2668 {
2669         struct il_priv *il = container_of(data, struct il_priv, restart);
2670
2671         if (test_bit(S_EXIT_PENDING, &il->status))
2672                 return;
2673
2674         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2675                 mutex_lock(&il->mutex);
2676                 il->is_open = 0;
2677                 mutex_unlock(&il->mutex);
2678                 il3945_down(il);
2679                 ieee80211_restart_hw(il->hw);
2680         } else {
2681                 il3945_down(il);
2682
2683                 mutex_lock(&il->mutex);
2684                 if (test_bit(S_EXIT_PENDING, &il->status)) {
2685                         mutex_unlock(&il->mutex);
2686                         return;
2687                 }
2688
2689                 __il3945_up(il);
2690                 mutex_unlock(&il->mutex);
2691         }
2692 }
2693
2694 static void
2695 il3945_bg_rx_replenish(struct work_struct *data)
2696 {
2697         struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2698
2699         mutex_lock(&il->mutex);
2700         if (test_bit(S_EXIT_PENDING, &il->status))
2701                 goto out;
2702
2703         il3945_rx_replenish(il);
2704 out:
2705         mutex_unlock(&il->mutex);
2706 }
2707
2708 void
2709 il3945_post_associate(struct il_priv *il)
2710 {
2711         int rc = 0;
2712         struct ieee80211_conf *conf = NULL;
2713
2714         if (!il->vif || !il->is_open)
2715                 return;
2716
2717         D_ASSOC("Associated as %d to: %pM\n", il->vif->bss_conf.aid,
2718                 il->active.bssid_addr);
2719
2720         if (test_bit(S_EXIT_PENDING, &il->status))
2721                 return;
2722
2723         il_scan_cancel_timeout(il, 200);
2724
2725         conf = &il->hw->conf;
2726
2727         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2728         il3945_commit_rxon(il);
2729
2730         rc = il_send_rxon_timing(il);
2731         if (rc)
2732                 IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2733
2734         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2735
2736         il->staging.assoc_id = cpu_to_le16(il->vif->bss_conf.aid);
2737
2738         D_ASSOC("assoc id %d beacon interval %d\n", il->vif->bss_conf.aid,
2739                 il->vif->bss_conf.beacon_int);
2740
2741         if (il->vif->bss_conf.use_short_preamble)
2742                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2743         else
2744                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2745
2746         if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2747                 if (il->vif->bss_conf.use_short_slot)
2748                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2749                 else
2750                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2751         }
2752
2753         il3945_commit_rxon(il);
2754
2755         switch (il->vif->type) {
2756         case NL80211_IFTYPE_STATION:
2757                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2758                 break;
2759         case NL80211_IFTYPE_ADHOC:
2760                 il3945_send_beacon_cmd(il);
2761                 break;
2762         default:
2763                 IL_ERR("%s Should not be called in %d mode\n", __func__,
2764                       il->vif->type);
2765                 break;
2766         }
2767 }
2768
2769 /*****************************************************************************
2770  *
2771  * mac80211 entry point functions
2772  *
2773  *****************************************************************************/
2774
2775 #define UCODE_READY_TIMEOUT     (2 * HZ)
2776
2777 static int
2778 il3945_mac_start(struct ieee80211_hw *hw)
2779 {
2780         struct il_priv *il = hw->priv;
2781         int ret;
2782
2783         /* we should be verifying the device is ready to be opened */
2784         mutex_lock(&il->mutex);
2785         D_MAC80211("enter\n");
2786
2787         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2788          * ucode filename and max sizes are card-specific. */
2789
2790         if (!il->ucode_code.len) {
2791                 ret = il3945_read_ucode(il);
2792                 if (ret) {
2793                         IL_ERR("Could not read microcode: %d\n", ret);
2794                         mutex_unlock(&il->mutex);
2795                         goto out_release_irq;
2796                 }
2797         }
2798
2799         ret = __il3945_up(il);
2800
2801         mutex_unlock(&il->mutex);
2802
2803         if (ret)
2804                 goto out_release_irq;
2805
2806         D_INFO("Start UP work.\n");
2807
2808         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2809          * mac80211 will not be run successfully. */
2810         ret = wait_event_timeout(il->wait_command_queue,
2811                                  test_bit(S_READY, &il->status),
2812                                  UCODE_READY_TIMEOUT);
2813         if (!ret) {
2814                 if (!test_bit(S_READY, &il->status)) {
2815                         IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2816                                jiffies_to_msecs(UCODE_READY_TIMEOUT));
2817                         ret = -ETIMEDOUT;
2818                         goto out_release_irq;
2819                 }
2820         }
2821
2822         /* ucode is running and will send rfkill notifications,
2823          * no need to poll the killswitch state anymore */
2824         cancel_delayed_work(&il->_3945.rfkill_poll);
2825
2826         il->is_open = 1;
2827         D_MAC80211("leave\n");
2828         return 0;
2829
2830 out_release_irq:
2831         il->is_open = 0;
2832         D_MAC80211("leave - failed\n");
2833         return ret;
2834 }
2835
2836 static void
2837 il3945_mac_stop(struct ieee80211_hw *hw)
2838 {
2839         struct il_priv *il = hw->priv;
2840
2841         D_MAC80211("enter\n");
2842
2843         if (!il->is_open) {
2844                 D_MAC80211("leave - skip\n");
2845                 return;
2846         }
2847
2848         il->is_open = 0;
2849
2850         il3945_down(il);
2851
2852         flush_workqueue(il->workqueue);
2853
2854         /* start polling the killswitch state again */
2855         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2856                            round_jiffies_relative(2 * HZ));
2857
2858         D_MAC80211("leave\n");
2859 }
2860
2861 static void
2862 il3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2863 {
2864         struct il_priv *il = hw->priv;
2865
2866         D_MAC80211("enter\n");
2867
2868         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2869              ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2870
2871         if (il3945_tx_skb(il, skb))
2872                 dev_kfree_skb_any(skb);
2873
2874         D_MAC80211("leave\n");
2875 }
2876
2877 void
2878 il3945_config_ap(struct il_priv *il)
2879 {
2880         struct ieee80211_vif *vif = il->vif;
2881         int rc = 0;
2882
2883         if (test_bit(S_EXIT_PENDING, &il->status))
2884                 return;
2885
2886         /* The following should be done only at AP bring up */
2887         if (!(il_is_associated(il))) {
2888
2889                 /* RXON - unassoc (to set timing command) */
2890                 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2891                 il3945_commit_rxon(il);
2892
2893                 /* RXON Timing */
2894                 rc = il_send_rxon_timing(il);
2895                 if (rc)
2896                         IL_WARN("C_RXON_TIMING failed - "
2897                                 "Attempting to continue.\n");
2898
2899                 il->staging.assoc_id = 0;
2900
2901                 if (vif->bss_conf.use_short_preamble)
2902                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2903                 else
2904                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2905
2906                 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2907                         if (vif->bss_conf.use_short_slot)
2908                                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2909                         else
2910                                 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2911                 }
2912                 /* restore RXON assoc */
2913                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2914                 il3945_commit_rxon(il);
2915         }
2916         il3945_send_beacon_cmd(il);
2917 }
2918
2919 static int
2920 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2921                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2922                    struct ieee80211_key_conf *key)
2923 {
2924         struct il_priv *il = hw->priv;
2925         int ret = 0;
2926         u8 sta_id = IL_INVALID_STATION;
2927         u8 static_key;
2928
2929         D_MAC80211("enter\n");
2930
2931         if (il3945_mod_params.sw_crypto) {
2932                 D_MAC80211("leave - hwcrypto disabled\n");
2933                 return -EOPNOTSUPP;
2934         }
2935
2936         /*
2937          * To support IBSS RSN, don't program group keys in IBSS, the
2938          * hardware will then not attempt to decrypt the frames.
2939          */
2940         if (vif->type == NL80211_IFTYPE_ADHOC &&
2941             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2942                 D_MAC80211("leave - IBSS RSN\n");
2943                 return -EOPNOTSUPP;
2944         }
2945
2946         static_key = !il_is_associated(il);
2947
2948         if (!static_key) {
2949                 sta_id = il_sta_id_or_broadcast(il, sta);
2950                 if (sta_id == IL_INVALID_STATION) {
2951                         D_MAC80211("leave - station not found\n");
2952                         return -EINVAL;
2953                 }
2954         }
2955
2956         mutex_lock(&il->mutex);
2957         il_scan_cancel_timeout(il, 100);
2958
2959         switch (cmd) {
2960         case SET_KEY:
2961                 if (static_key)
2962                         ret = il3945_set_static_key(il, key);
2963                 else
2964                         ret = il3945_set_dynamic_key(il, key, sta_id);
2965                 D_MAC80211("enable hwcrypto key\n");
2966                 break;
2967         case DISABLE_KEY:
2968                 if (static_key)
2969                         ret = il3945_remove_static_key(il);
2970                 else
2971                         ret = il3945_clear_sta_key_info(il, sta_id);
2972                 D_MAC80211("disable hwcrypto key\n");
2973                 break;
2974         default:
2975                 ret = -EINVAL;
2976         }
2977
2978         D_MAC80211("leave ret %d\n", ret);
2979         mutex_unlock(&il->mutex);
2980
2981         return ret;
2982 }
2983
2984 static int
2985 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2986                    struct ieee80211_sta *sta)
2987 {
2988         struct il_priv *il = hw->priv;
2989         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
2990         int ret;
2991         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2992         u8 sta_id;
2993
2994         mutex_lock(&il->mutex);
2995         D_INFO("station %pM\n", sta->addr);
2996         sta_priv->common.sta_id = IL_INVALID_STATION;
2997
2998         ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
2999         if (ret) {
3000                 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
3001                 /* Should we return success if return code is EEXIST ? */
3002                 mutex_unlock(&il->mutex);
3003                 return ret;
3004         }
3005
3006         sta_priv->common.sta_id = sta_id;
3007
3008         /* Initialize rate scaling */
3009         D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
3010         il3945_rs_rate_init(il, sta, sta_id);
3011         mutex_unlock(&il->mutex);
3012
3013         return 0;
3014 }
3015
3016 static void
3017 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
3018                         unsigned int *total_flags, u64 multicast)
3019 {
3020         struct il_priv *il = hw->priv;
3021         __le32 filter_or = 0, filter_nand = 0;
3022
3023 #define CHK(test, flag) do { \
3024         if (*total_flags & (test))              \
3025                 filter_or |= (flag);            \
3026         else                                    \
3027                 filter_nand |= (flag);          \
3028         } while (0)
3029
3030         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3031                    *total_flags);
3032
3033         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3034         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3035         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3036
3037 #undef CHK
3038
3039         mutex_lock(&il->mutex);
3040
3041         il->staging.filter_flags &= ~filter_nand;
3042         il->staging.filter_flags |= filter_or;
3043
3044         /*
3045          * Not committing directly because hardware can perform a scan,
3046          * but even if hw is ready, committing here breaks for some reason,
3047          * we'll eventually commit the filter flags change anyway.
3048          */
3049
3050         mutex_unlock(&il->mutex);
3051
3052         /*
3053          * Receiving all multicast frames is always enabled by the
3054          * default flags setup in il_connection_init_rx_config()
3055          * since we currently do not support programming multicast
3056          * filters into the device.
3057          */
3058         *total_flags &=
3059             FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3060             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3061 }
3062
3063 /*****************************************************************************
3064  *
3065  * sysfs attributes
3066  *
3067  *****************************************************************************/
3068
3069 #ifdef CONFIG_IWLEGACY_DEBUG
3070
3071 /*
3072  * The following adds a new attribute to the sysfs representation
3073  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3074  * used for controlling the debug level.
3075  *
3076  * See the level definitions in iwl for details.
3077  *
3078  * The debug_level being managed using sysfs below is a per device debug
3079  * level that is used instead of the global debug level if it (the per
3080  * device debug level) is set.
3081  */
3082 static ssize_t
3083 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3084                         char *buf)
3085 {
3086         struct il_priv *il = dev_get_drvdata(d);
3087         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3088 }
3089
3090 static ssize_t
3091 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3092                          const char *buf, size_t count)
3093 {
3094         struct il_priv *il = dev_get_drvdata(d);
3095         unsigned long val;
3096         int ret;
3097
3098         ret = strict_strtoul(buf, 0, &val);
3099         if (ret)
3100                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3101         else
3102                 il->debug_level = val;
3103
3104         return strnlen(buf, count);
3105 }
3106
3107 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, il3945_show_debug_level,
3108                    il3945_store_debug_level);
3109
3110 #endif /* CONFIG_IWLEGACY_DEBUG */
3111
3112 static ssize_t
3113 il3945_show_temperature(struct device *d, struct device_attribute *attr,
3114                         char *buf)
3115 {
3116         struct il_priv *il = dev_get_drvdata(d);
3117
3118         if (!il_is_alive(il))
3119                 return -EAGAIN;
3120
3121         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3122 }
3123
3124 static DEVICE_ATTR(temperature, S_IRUGO, il3945_show_temperature, NULL);
3125
3126 static ssize_t
3127 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3128 {
3129         struct il_priv *il = dev_get_drvdata(d);
3130         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3131 }
3132
3133 static ssize_t
3134 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3135                       const char *buf, size_t count)
3136 {
3137         struct il_priv *il = dev_get_drvdata(d);
3138         char *p = (char *)buf;
3139         u32 val;
3140
3141         val = simple_strtoul(p, &p, 10);
3142         if (p == buf)
3143                 IL_INFO(": %s is not in decimal form.\n", buf);
3144         else
3145                 il3945_hw_reg_set_txpower(il, val);
3146
3147         return count;
3148 }
3149
3150 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il3945_show_tx_power,
3151                    il3945_store_tx_power);
3152
3153 static ssize_t
3154 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3155 {
3156         struct il_priv *il = dev_get_drvdata(d);
3157
3158         return sprintf(buf, "0x%04X\n", il->active.flags);
3159 }
3160
3161 static ssize_t
3162 il3945_store_flags(struct device *d, struct device_attribute *attr,
3163                    const char *buf, size_t count)
3164 {
3165         struct il_priv *il = dev_get_drvdata(d);
3166         u32 flags = simple_strtoul(buf, NULL, 0);
3167
3168         mutex_lock(&il->mutex);
3169         if (le32_to_cpu(il->staging.flags) != flags) {
3170                 /* Cancel any currently running scans... */
3171                 if (il_scan_cancel_timeout(il, 100))
3172                         IL_WARN("Could not cancel scan.\n");
3173                 else {
3174                         D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3175                         il->staging.flags = cpu_to_le32(flags);
3176                         il3945_commit_rxon(il);
3177                 }
3178         }
3179         mutex_unlock(&il->mutex);
3180
3181         return count;
3182 }
3183
3184 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, il3945_show_flags,
3185                    il3945_store_flags);
3186
3187 static ssize_t
3188 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3189                          char *buf)
3190 {
3191         struct il_priv *il = dev_get_drvdata(d);
3192
3193         return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3194 }
3195
3196 static ssize_t
3197 il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
3198                           const char *buf, size_t count)
3199 {
3200         struct il_priv *il = dev_get_drvdata(d);
3201         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3202
3203         mutex_lock(&il->mutex);
3204         if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
3205                 /* Cancel any currently running scans... */
3206                 if (il_scan_cancel_timeout(il, 100))
3207                         IL_WARN("Could not cancel scan.\n");
3208                 else {
3209                         D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
3210                                filter_flags);
3211                         il->staging.filter_flags = cpu_to_le32(filter_flags);
3212                         il3945_commit_rxon(il);
3213                 }
3214         }
3215         mutex_unlock(&il->mutex);
3216
3217         return count;
3218 }
3219
3220 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, il3945_show_filter_flags,
3221                    il3945_store_filter_flags);
3222
3223 static ssize_t
3224 il3945_show_measurement(struct device *d, struct device_attribute *attr,
3225                         char *buf)
3226 {
3227         struct il_priv *il = dev_get_drvdata(d);
3228         struct il_spectrum_notification measure_report;
3229         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3230         u8 *data = (u8 *) &measure_report;
3231         unsigned long flags;
3232
3233         spin_lock_irqsave(&il->lock, flags);
3234         if (!(il->measurement_status & MEASUREMENT_READY)) {
3235                 spin_unlock_irqrestore(&il->lock, flags);
3236                 return 0;
3237         }
3238         memcpy(&measure_report, &il->measure_report, size);
3239         il->measurement_status = 0;
3240         spin_unlock_irqrestore(&il->lock, flags);
3241
3242         while (size && PAGE_SIZE - len) {
3243                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3244                                    PAGE_SIZE - len, 1);
3245                 len = strlen(buf);
3246                 if (PAGE_SIZE - len)
3247                         buf[len++] = '\n';
3248
3249                 ofs += 16;
3250                 size -= min(size, 16U);
3251         }
3252
3253         return len;
3254 }
3255
3256 static ssize_t
3257 il3945_store_measurement(struct device *d, struct device_attribute *attr,
3258                          const char *buf, size_t count)
3259 {
3260         struct il_priv *il = dev_get_drvdata(d);
3261         struct ieee80211_measurement_params params = {
3262                 .channel = le16_to_cpu(il->active.channel),
3263                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3264                 .duration = cpu_to_le16(1),
3265         };
3266         u8 type = IL_MEASURE_BASIC;
3267         u8 buffer[32];
3268         u8 channel;
3269
3270         if (count) {
3271                 char *p = buffer;
3272                 strncpy(buffer, buf, min(sizeof(buffer), count));
3273                 channel = simple_strtoul(p, NULL, 0);
3274                 if (channel)
3275                         params.channel = channel;
3276
3277                 p = buffer;
3278                 while (*p && *p != ' ')
3279                         p++;
3280                 if (*p)
3281                         type = simple_strtoul(p + 1, NULL, 0);
3282         }
3283
3284         D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3285                type, params.channel, buf);
3286         il3945_get_measurement(il, &params, type);
3287
3288         return count;
3289 }
3290
3291 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, il3945_show_measurement,
3292                    il3945_store_measurement);
3293
3294 static ssize_t
3295 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3296                         const char *buf, size_t count)
3297 {
3298         struct il_priv *il = dev_get_drvdata(d);
3299
3300         il->retry_rate = simple_strtoul(buf, NULL, 0);
3301         if (il->retry_rate <= 0)
3302                 il->retry_rate = 1;
3303
3304         return count;
3305 }
3306
3307 static ssize_t
3308 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3309                        char *buf)
3310 {
3311         struct il_priv *il = dev_get_drvdata(d);
3312         return sprintf(buf, "%d", il->retry_rate);
3313 }
3314
3315 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, il3945_show_retry_rate,
3316                    il3945_store_retry_rate);
3317
3318 static ssize_t
3319 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3320 {
3321         /* all this shit doesn't belong into sysfs anyway */
3322         return 0;
3323 }
3324
3325 static DEVICE_ATTR(channels, S_IRUSR, il3945_show_channels, NULL);
3326
3327 static ssize_t
3328 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3329 {
3330         struct il_priv *il = dev_get_drvdata(d);
3331
3332         if (!il_is_alive(il))
3333                 return -EAGAIN;
3334
3335         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3336 }
3337
3338 static ssize_t
3339 il3945_store_antenna(struct device *d, struct device_attribute *attr,
3340                      const char *buf, size_t count)
3341 {
3342         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3343         int ant;
3344
3345         if (count == 0)
3346                 return 0;
3347
3348         if (sscanf(buf, "%1i", &ant) != 1) {
3349                 D_INFO("not in hex or decimal form.\n");
3350                 return count;
3351         }
3352
3353         if (ant >= 0 && ant <= 2) {
3354                 D_INFO("Setting antenna select to %d.\n", ant);
3355                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3356         } else
3357                 D_INFO("Bad antenna select value %d.\n", ant);
3358
3359         return count;
3360 }
3361
3362 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, il3945_show_antenna,
3363                    il3945_store_antenna);
3364
3365 static ssize_t
3366 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3367 {
3368         struct il_priv *il = dev_get_drvdata(d);
3369         if (!il_is_alive(il))
3370                 return -EAGAIN;
3371         return sprintf(buf, "0x%08x\n", (int)il->status);
3372 }
3373
3374 static DEVICE_ATTR(status, S_IRUGO, il3945_show_status, NULL);
3375
3376 static ssize_t
3377 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3378                       const char *buf, size_t count)
3379 {
3380         struct il_priv *il = dev_get_drvdata(d);
3381         char *p = (char *)buf;
3382
3383         if (p[0] == '1')
3384                 il3945_dump_nic_error_log(il);
3385
3386         return strnlen(buf, count);
3387 }
3388
3389 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, il3945_dump_error_log);
3390
3391 /*****************************************************************************
3392  *
3393  * driver setup and tear down
3394  *
3395  *****************************************************************************/
3396
3397 static void
3398 il3945_setup_deferred_work(struct il_priv *il)
3399 {
3400         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3401
3402         init_waitqueue_head(&il->wait_command_queue);
3403
3404         INIT_WORK(&il->restart, il3945_bg_restart);
3405         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3406         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3407         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3408         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3409
3410         il_setup_scan_deferred_work(il);
3411
3412         il3945_hw_setup_deferred_work(il);
3413
3414         init_timer(&il->watchdog);
3415         il->watchdog.data = (unsigned long)il;
3416         il->watchdog.function = il_bg_watchdog;
3417
3418         tasklet_init(&il->irq_tasklet,
3419                      (void (*)(unsigned long))il3945_irq_tasklet,
3420                      (unsigned long)il);
3421 }
3422
3423 static void
3424 il3945_cancel_deferred_work(struct il_priv *il)
3425 {
3426         il3945_hw_cancel_deferred_work(il);
3427
3428         cancel_delayed_work_sync(&il->init_alive_start);
3429         cancel_delayed_work(&il->alive_start);
3430
3431         il_cancel_scan_deferred_work(il);
3432 }
3433
3434 static struct attribute *il3945_sysfs_entries[] = {
3435         &dev_attr_antenna.attr,
3436         &dev_attr_channels.attr,
3437         &dev_attr_dump_errors.attr,
3438         &dev_attr_flags.attr,
3439         &dev_attr_filter_flags.attr,
3440         &dev_attr_measurement.attr,
3441         &dev_attr_retry_rate.attr,
3442         &dev_attr_status.attr,
3443         &dev_attr_temperature.attr,
3444         &dev_attr_tx_power.attr,
3445 #ifdef CONFIG_IWLEGACY_DEBUG
3446         &dev_attr_debug_level.attr,
3447 #endif
3448         NULL
3449 };
3450
3451 static struct attribute_group il3945_attribute_group = {
3452         .name = NULL,           /* put in device directory */
3453         .attrs = il3945_sysfs_entries,
3454 };
3455
3456 struct ieee80211_ops il3945_mac_ops = {
3457         .tx = il3945_mac_tx,
3458         .start = il3945_mac_start,
3459         .stop = il3945_mac_stop,
3460         .add_interface = il_mac_add_interface,
3461         .remove_interface = il_mac_remove_interface,
3462         .change_interface = il_mac_change_interface,
3463         .config = il_mac_config,
3464         .configure_filter = il3945_configure_filter,
3465         .set_key = il3945_mac_set_key,
3466         .conf_tx = il_mac_conf_tx,
3467         .reset_tsf = il_mac_reset_tsf,
3468         .bss_info_changed = il_mac_bss_info_changed,
3469         .hw_scan = il_mac_hw_scan,
3470         .sta_add = il3945_mac_sta_add,
3471         .sta_remove = il_mac_sta_remove,
3472         .tx_last_beacon = il_mac_tx_last_beacon,
3473 };
3474
3475 static int
3476 il3945_init_drv(struct il_priv *il)
3477 {
3478         int ret;
3479         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3480
3481         il->retry_rate = 1;
3482         il->beacon_skb = NULL;
3483
3484         spin_lock_init(&il->sta_lock);
3485         spin_lock_init(&il->hcmd_lock);
3486
3487         INIT_LIST_HEAD(&il->free_frames);
3488
3489         mutex_init(&il->mutex);
3490
3491         il->ieee_channels = NULL;
3492         il->ieee_rates = NULL;
3493         il->band = IEEE80211_BAND_2GHZ;
3494
3495         il->iw_mode = NL80211_IFTYPE_STATION;
3496         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3497
3498         /* initialize force reset */
3499         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3500
3501         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3502                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3503                         eeprom->version);
3504                 ret = -EINVAL;
3505                 goto err;
3506         }
3507         ret = il_init_channel_map(il);
3508         if (ret) {
3509                 IL_ERR("initializing regulatory failed: %d\n", ret);
3510                 goto err;
3511         }
3512
3513         /* Set up txpower settings in driver for all channels */
3514         if (il3945_txpower_set_from_eeprom(il)) {
3515                 ret = -EIO;
3516                 goto err_free_channel_map;
3517         }
3518
3519         ret = il_init_geos(il);
3520         if (ret) {
3521                 IL_ERR("initializing geos failed: %d\n", ret);
3522                 goto err_free_channel_map;
3523         }
3524         il3945_init_hw_rates(il, il->ieee_rates);
3525
3526         return 0;
3527
3528 err_free_channel_map:
3529         il_free_channel_map(il);
3530 err:
3531         return ret;
3532 }
3533
3534 #define IL3945_MAX_PROBE_REQUEST        200
3535
3536 static int
3537 il3945_setup_mac(struct il_priv *il)
3538 {
3539         int ret;
3540         struct ieee80211_hw *hw = il->hw;
3541
3542         hw->rate_control_algorithm = "iwl-3945-rs";
3543         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3544         hw->vif_data_size = sizeof(struct il_vif_priv);
3545
3546         /* Tell mac80211 our characteristics */
3547         hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_SPECTRUM_MGMT;
3548
3549         hw->wiphy->interface_modes =
3550             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3551
3552         hw->wiphy->flags |=
3553             WIPHY_FLAG_CUSTOM_REGULATORY | WIPHY_FLAG_DISABLE_BEACON_HINTS |
3554             WIPHY_FLAG_IBSS_RSN;
3555
3556         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3557         /* we create the 802.11 header and a zero-length SSID element */
3558         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3559
3560         /* Default value; 4 EDCA QOS priorities */
3561         hw->queues = 4;
3562
3563         if (il->bands[IEEE80211_BAND_2GHZ].n_channels)
3564                 il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3565                     &il->bands[IEEE80211_BAND_2GHZ];
3566
3567         if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
3568                 il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3569                     &il->bands[IEEE80211_BAND_5GHZ];
3570
3571         il_leds_init(il);
3572
3573         ret = ieee80211_register_hw(il->hw);
3574         if (ret) {
3575                 IL_ERR("Failed to register hw (error %d)\n", ret);
3576                 return ret;
3577         }
3578         il->mac80211_registered = 1;
3579
3580         return 0;
3581 }
3582
3583 static int
3584 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3585 {
3586         int err = 0;
3587         struct il_priv *il;
3588         struct ieee80211_hw *hw;
3589         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3590         struct il3945_eeprom *eeprom;
3591         unsigned long flags;
3592
3593         /***********************
3594          * 1. Allocating HW data
3595          * ********************/
3596
3597         hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3598         if (!hw) {
3599                 err = -ENOMEM;
3600                 goto out;
3601         }
3602         il = hw->priv;
3603         il->hw = hw;
3604         SET_IEEE80211_DEV(hw, &pdev->dev);
3605
3606         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3607
3608         /*
3609          * Disabling hardware scan means that mac80211 will perform scans
3610          * "the hard way", rather than using device's scan.
3611          */
3612         if (il3945_mod_params.disable_hw_scan) {
3613                 D_INFO("Disabling hw_scan\n");
3614                 il3945_mac_ops.hw_scan = NULL;
3615         }
3616
3617         D_INFO("*** LOAD DRIVER ***\n");
3618         il->cfg = cfg;
3619         il->ops = &il3945_ops;
3620 #ifdef CONFIG_IWLEGACY_DEBUGFS
3621         il->debugfs_ops = &il3945_debugfs_ops;
3622 #endif
3623         il->pci_dev = pdev;
3624         il->inta_mask = CSR_INI_SET_MASK;
3625
3626         /***************************
3627          * 2. Initializing PCI bus
3628          * *************************/
3629         pci_disable_link_state(pdev,
3630                                PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3631                                PCIE_LINK_STATE_CLKPM);
3632
3633         if (pci_enable_device(pdev)) {
3634                 err = -ENODEV;
3635                 goto out_ieee80211_free_hw;
3636         }
3637
3638         pci_set_master(pdev);
3639
3640         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3641         if (!err)
3642                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3643         if (err) {
3644                 IL_WARN("No suitable DMA available.\n");
3645                 goto out_pci_disable_device;
3646         }
3647
3648         pci_set_drvdata(pdev, il);
3649         err = pci_request_regions(pdev, DRV_NAME);
3650         if (err)
3651                 goto out_pci_disable_device;
3652
3653         /***********************
3654          * 3. Read REV Register
3655          * ********************/
3656         il->hw_base = pci_ioremap_bar(pdev, 0);
3657         if (!il->hw_base) {
3658                 err = -ENODEV;
3659                 goto out_pci_release_regions;
3660         }
3661
3662         D_INFO("pci_resource_len = 0x%08llx\n",
3663                (unsigned long long)pci_resource_len(pdev, 0));
3664         D_INFO("pci_resource_base = %p\n", il->hw_base);
3665
3666         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3667          * PCI Tx retries from interfering with C3 CPU state */
3668         pci_write_config_byte(pdev, 0x41, 0x00);
3669
3670         /* these spin locks will be used in apm_init and EEPROM access
3671          * we should init now
3672          */
3673         spin_lock_init(&il->reg_lock);
3674         spin_lock_init(&il->lock);
3675
3676         /*
3677          * stop and reset the on-board processor just in case it is in a
3678          * strange state ... like being left stranded by a primary kernel
3679          * and this is now the kdump kernel trying to start up
3680          */
3681         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3682
3683         /***********************
3684          * 4. Read EEPROM
3685          * ********************/
3686
3687         /* Read the EEPROM */
3688         err = il_eeprom_init(il);
3689         if (err) {
3690                 IL_ERR("Unable to init EEPROM\n");
3691                 goto out_iounmap;
3692         }
3693         /* MAC Address location in EEPROM same for 3945/4965 */
3694         eeprom = (struct il3945_eeprom *)il->eeprom;
3695         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3696         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3697
3698         /***********************
3699          * 5. Setup HW Constants
3700          * ********************/
3701         /* Device-specific setup */
3702         if (il3945_hw_set_hw_params(il)) {
3703                 IL_ERR("failed to set hw settings\n");
3704                 goto out_eeprom_free;
3705         }
3706
3707         /***********************
3708          * 6. Setup il
3709          * ********************/
3710
3711         err = il3945_init_drv(il);
3712         if (err) {
3713                 IL_ERR("initializing driver failed\n");
3714                 goto out_unset_hw_params;
3715         }
3716
3717         IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3718
3719         /***********************
3720          * 7. Setup Services
3721          * ********************/
3722
3723         spin_lock_irqsave(&il->lock, flags);
3724         il_disable_interrupts(il);
3725         spin_unlock_irqrestore(&il->lock, flags);
3726
3727         pci_enable_msi(il->pci_dev);
3728
3729         err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3730         if (err) {
3731                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3732                 goto out_disable_msi;
3733         }
3734
3735         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3736         if (err) {
3737                 IL_ERR("failed to create sysfs device attributes\n");
3738                 goto out_release_irq;
3739         }
3740
3741         il_set_rxon_channel(il, &il->bands[IEEE80211_BAND_2GHZ].channels[5]);
3742         il3945_setup_deferred_work(il);
3743         il3945_setup_handlers(il);
3744         il_power_initialize(il);
3745
3746         /*********************************
3747          * 8. Setup and Register mac80211
3748          * *******************************/
3749
3750         il_enable_interrupts(il);
3751
3752         err = il3945_setup_mac(il);
3753         if (err)
3754                 goto out_remove_sysfs;
3755
3756         err = il_dbgfs_register(il, DRV_NAME);
3757         if (err)
3758                 IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
3759                        err);
3760
3761         /* Start monitoring the killswitch */
3762         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3763
3764         return 0;
3765
3766 out_remove_sysfs:
3767         destroy_workqueue(il->workqueue);
3768         il->workqueue = NULL;
3769         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3770 out_release_irq:
3771         free_irq(il->pci_dev->irq, il);
3772 out_disable_msi:
3773         pci_disable_msi(il->pci_dev);
3774         il_free_geos(il);
3775         il_free_channel_map(il);
3776 out_unset_hw_params:
3777         il3945_unset_hw_params(il);
3778 out_eeprom_free:
3779         il_eeprom_free(il);
3780 out_iounmap:
3781         iounmap(il->hw_base);
3782 out_pci_release_regions:
3783         pci_release_regions(pdev);
3784 out_pci_disable_device:
3785         pci_set_drvdata(pdev, NULL);
3786         pci_disable_device(pdev);
3787 out_ieee80211_free_hw:
3788         ieee80211_free_hw(il->hw);
3789 out:
3790         return err;
3791 }
3792
3793 static void __devexit
3794 il3945_pci_remove(struct pci_dev *pdev)
3795 {
3796         struct il_priv *il = pci_get_drvdata(pdev);
3797         unsigned long flags;
3798
3799         if (!il)
3800                 return;
3801
3802         D_INFO("*** UNLOAD DRIVER ***\n");
3803
3804         il_dbgfs_unregister(il);
3805
3806         set_bit(S_EXIT_PENDING, &il->status);
3807
3808         il_leds_exit(il);
3809
3810         if (il->mac80211_registered) {
3811                 ieee80211_unregister_hw(il->hw);
3812                 il->mac80211_registered = 0;
3813         } else {
3814                 il3945_down(il);
3815         }
3816
3817         /*
3818          * Make sure device is reset to low power before unloading driver.
3819          * This may be redundant with il_down(), but there are paths to
3820          * run il_down() without calling apm_ops.stop(), and there are
3821          * paths to avoid running il_down() at all before leaving driver.
3822          * This (inexpensive) call *makes sure* device is reset.
3823          */
3824         il_apm_stop(il);
3825
3826         /* make sure we flush any pending irq or
3827          * tasklet for the driver
3828          */
3829         spin_lock_irqsave(&il->lock, flags);
3830         il_disable_interrupts(il);
3831         spin_unlock_irqrestore(&il->lock, flags);
3832
3833         il3945_synchronize_irq(il);
3834
3835         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3836
3837         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3838
3839         il3945_dealloc_ucode_pci(il);
3840
3841         if (il->rxq.bd)
3842                 il3945_rx_queue_free(il, &il->rxq);
3843         il3945_hw_txq_ctx_free(il);
3844
3845         il3945_unset_hw_params(il);
3846
3847         /*netif_stop_queue(dev); */
3848         flush_workqueue(il->workqueue);
3849
3850         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3851          * il->workqueue... so we can't take down the workqueue
3852          * until now... */
3853         destroy_workqueue(il->workqueue);
3854         il->workqueue = NULL;
3855
3856         free_irq(pdev->irq, il);
3857         pci_disable_msi(pdev);
3858
3859         iounmap(il->hw_base);
3860         pci_release_regions(pdev);
3861         pci_disable_device(pdev);
3862         pci_set_drvdata(pdev, NULL);
3863
3864         il_free_channel_map(il);
3865         il_free_geos(il);
3866         kfree(il->scan_cmd);
3867         if (il->beacon_skb)
3868                 dev_kfree_skb(il->beacon_skb);
3869
3870         ieee80211_free_hw(il->hw);
3871 }
3872
3873 /*****************************************************************************
3874  *
3875  * driver and module entry point
3876  *
3877  *****************************************************************************/
3878
3879 static struct pci_driver il3945_driver = {
3880         .name = DRV_NAME,
3881         .id_table = il3945_hw_card_ids,
3882         .probe = il3945_pci_probe,
3883         .remove = __devexit_p(il3945_pci_remove),
3884         .driver.pm = IL_LEGACY_PM_OPS,
3885 };
3886
3887 static int __init
3888 il3945_init(void)
3889 {
3890
3891         int ret;
3892         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3893         pr_info(DRV_COPYRIGHT "\n");
3894
3895         ret = il3945_rate_control_register();
3896         if (ret) {
3897                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3898                 return ret;
3899         }
3900
3901         ret = pci_register_driver(&il3945_driver);
3902         if (ret) {
3903                 pr_err("Unable to initialize PCI module\n");
3904                 goto error_register;
3905         }
3906
3907         return ret;
3908
3909 error_register:
3910         il3945_rate_control_unregister();
3911         return ret;
3912 }
3913
3914 static void __exit
3915 il3945_exit(void)
3916 {
3917         pci_unregister_driver(&il3945_driver);
3918         il3945_rate_control_unregister();
3919 }
3920
3921 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3922
3923 module_param_named(antenna, il3945_mod_params.antenna, int, S_IRUGO);
3924 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3925 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, S_IRUGO);
3926 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3927 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3928                    S_IRUGO);
3929 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3930 #ifdef CONFIG_IWLEGACY_DEBUG
3931 module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
3932 MODULE_PARM_DESC(debug, "debug output mask");
3933 #endif
3934 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, S_IRUGO);
3935 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3936
3937 module_exit(il3945_exit);
3938 module_init(il3945_init);