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,
 464               struct ieee80211_sta *sta,
 465               struct sk_buff *skb)
 466 {
 467         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 468         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 469         struct il3945_tx_cmd *tx_cmd;
 470         struct il_tx_queue *txq = NULL;
 471         struct il_queue *q = NULL;
 472         struct il_device_cmd *out_cmd;
 473         struct il_cmd_meta *out_meta;
 474         dma_addr_t phys_addr;
 475         dma_addr_t txcmd_phys;
 476         int txq_id = skb_get_queue_mapping(skb);
 477         u16 len, idx, hdr_len;
 478         u8 id;
 479         u8 unicast;
 480         u8 sta_id;
 481         u8 tid = 0;
 482         __le16 fc;
 483         u8 wait_write_ptr = 0;
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&il->lock, flags);
 487         if (il_is_rfkill(il)) {
 488                 D_DROP("Dropping - RF KILL\n");
 489                 goto drop_unlock;
 490         }
 491
 492         if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
 493             IL_INVALID_RATE) {
 494                 IL_ERR("ERROR: No TX rate available.\n");
 495                 goto drop_unlock;
 496         }
 497
 498         unicast = !is_multicast_ether_addr(hdr->addr1);
 499         id = 0;
 500
 501         fc = hdr->frame_control;
 502
 503 #ifdef CONFIG_IWLEGACY_DEBUG
 504         if (ieee80211_is_auth(fc))
 505                 D_TX("Sending AUTH frame\n");
 506         else if (ieee80211_is_assoc_req(fc))
 507                 D_TX("Sending ASSOC frame\n");
 508         else if (ieee80211_is_reassoc_req(fc))
 509                 D_TX("Sending REASSOC frame\n");
 510 #endif
 511
 512         spin_unlock_irqrestore(&il->lock, flags);
 513
 514         hdr_len = ieee80211_hdrlen(fc);
 515
 516         /* Find idx into station table for destination station */
 517         sta_id = il_sta_id_or_broadcast(il, sta);
 518         if (sta_id == IL_INVALID_STATION) {
 519                 D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
 520                 goto drop;
 521         }
 522
 523         D_RATE("station Id %d\n", sta_id);
 524
 525         if (ieee80211_is_data_qos(fc)) {
 526                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 527                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 528                 if (unlikely(tid >= MAX_TID_COUNT))
 529                         goto drop;
 530         }
 531
 532         /* Descriptor for chosen Tx queue */
 533         txq = &il->txq[txq_id];
 534         q = &txq->q;
 535
 536         if ((il_queue_space(q) < q->high_mark))
 537                 goto drop;
 538
 539         spin_lock_irqsave(&il->lock, flags);
 540
 541         idx = il_get_cmd_idx(q, q->write_ptr, 0);
 542
 543         txq->skbs[q->write_ptr] = skb;
 544
 545         /* Init first empty entry in queue's array of Tx/cmd buffers */
 546         out_cmd = txq->cmd[idx];
 547         out_meta = &txq->meta[idx];
 548         tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
 549         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 550         memset(tx_cmd, 0, sizeof(*tx_cmd));
 551
 552         /*
 553          * Set up the Tx-command (not MAC!) header.
 554          * Store the chosen Tx queue and TFD idx within the sequence field;
 555          * after Tx, uCode's Tx response will return this value so driver can
 556          * locate the frame within the tx queue and do post-tx processing.
 557          */
 558         out_cmd->hdr.cmd = C_TX;
 559         out_cmd->hdr.sequence =
 560             cpu_to_le16((u16)
 561                         (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 562
 563         /* Copy MAC header from skb into command buffer */
 564         memcpy(tx_cmd->hdr, hdr, hdr_len);
 565
 566         if (info->control.hw_key)
 567                 il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 568
 569         /* TODO need this for burst mode later on */
 570         il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 571
 572         il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 573
 574         /* Total # bytes to be transmitted */
 575         tx_cmd->len = cpu_to_le16((u16) skb->len);
 576
 577         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 578         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 579
 580         /*
 581          * Use the first empty entry in this queue's command buffer array
 582          * to contain the Tx command and MAC header concatenated together
 583          * (payload data will be in another buffer).
 584          * Size of this varies, due to varying MAC header length.
 585          * If end is not dword aligned, we'll have 2 extra bytes at the end
 586          * of the MAC header (device reads on dword boundaries).
 587          * We'll tell device about this padding later.
 588          */
 589         len =
 590             sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
 591             hdr_len;
 592         len = (len + 3) & ~3;
 593
 594         /* Physical address of this Tx command's header (not MAC header!),
 595          * within command buffer array. */
 596         txcmd_phys =
 597             pci_map_single(il->pci_dev, &out_cmd->hdr, len, PCI_DMA_TODEVICE);
 598         if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys)))
 599                 goto drop_unlock;
 600
 601         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 602          * if any (802.11 null frames have no payload). */
 603         len = skb->len - hdr_len;
 604         if (len) {
 605                 phys_addr =
 606                     pci_map_single(il->pci_dev, skb->data + hdr_len, len,
 607                                    PCI_DMA_TODEVICE);
 608                 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr)))
 609                         goto drop_unlock;
 610         }
 611
 612         /* Add buffer containing Tx command and MAC(!) header to TFD's
 613          * first entry */
 614         il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, len, 1, 0);
 615         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 616         dma_unmap_len_set(out_meta, len, len);
 617         if (len)
 618                 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, len, 0,
 619                                                U32_PAD(len));
 620
 621         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 622                 txq->need_update = 1;
 623         } else {
 624                 wait_write_ptr = 1;
 625                 txq->need_update = 0;
 626         }
 627
 628         il_update_stats(il, true, fc, skb->len);
 629
 630         D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
 631         D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 632         il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 633         il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
 634                           ieee80211_hdrlen(fc));
 635
 636         /* Tell device the write idx *just past* this latest filled TFD */
 637         q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
 638         il_txq_update_write_ptr(il, txq);
 639         spin_unlock_irqrestore(&il->lock, flags);
 640
 641         if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
 642                 if (wait_write_ptr) {
 643                         spin_lock_irqsave(&il->lock, flags);
 644                         txq->need_update = 1;
 645                         il_txq_update_write_ptr(il, txq);
 646                         spin_unlock_irqrestore(&il->lock, flags);
 647                 }
 648
 649                 il_stop_queue(il, txq);
 650         }
 651
 652         return 0;
 653
 654 drop_unlock:
 655         spin_unlock_irqrestore(&il->lock, flags);
 656 drop:
 657         return -1;
 658 }
 659
 660 static int
 661 il3945_get_measurement(struct il_priv *il,
 662                        struct ieee80211_measurement_params *params, u8 type)
 663 {
 664         struct il_spectrum_cmd spectrum;
 665         struct il_rx_pkt *pkt;
 666         struct il_host_cmd cmd = {
 667                 .id = C_SPECTRUM_MEASUREMENT,
 668                 .data = (void *)&spectrum,
 669                 .flags = CMD_WANT_SKB,
 670         };
 671         u32 add_time = le64_to_cpu(params->start_time);
 672         int rc;
 673         int spectrum_resp_status;
 674         int duration = le16_to_cpu(params->duration);
 675
 676         if (il_is_associated(il))
 677                 add_time =
 678                     il_usecs_to_beacons(il,
 679                                         le64_to_cpu(params->start_time) -
 680                                         il->_3945.last_tsf,
 681                                         le16_to_cpu(il->timing.beacon_interval));
 682
 683         memset(&spectrum, 0, sizeof(spectrum));
 684
 685         spectrum.channel_count = cpu_to_le16(1);
 686         spectrum.flags =
 687             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 688         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 689         cmd.len = sizeof(spectrum);
 690         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 691
 692         if (il_is_associated(il))
 693                 spectrum.start_time =
 694                     il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
 695                                        le16_to_cpu(il->timing.beacon_interval));
 696         else
 697                 spectrum.start_time = 0;
 698
 699         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 700         spectrum.channels[0].channel = params->channel;
 701         spectrum.channels[0].type = type;
 702         if (il->active.flags & RXON_FLG_BAND_24G_MSK)
 703                 spectrum.flags |=
 704                     RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
 705                     RXON_FLG_TGG_PROTECT_MSK;
 706
 707         rc = il_send_cmd_sync(il, &cmd);
 708         if (rc)
 709                 return rc;
 710
 711         pkt = (struct il_rx_pkt *)cmd.reply_page;
 712         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 713                 IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
 714                 rc = -EIO;
 715         }
 716
 717         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 718         switch (spectrum_resp_status) {
 719         case 0:         /* Command will be handled */
 720                 if (pkt->u.spectrum.id != 0xff) {
 721                         D_INFO("Replaced existing measurement: %d\n",
 722                                pkt->u.spectrum.id);
 723                         il->measurement_status &= ~MEASUREMENT_READY;
 724                 }
 725                 il->measurement_status |= MEASUREMENT_ACTIVE;
 726                 rc = 0;
 727                 break;
 728
 729         case 1:         /* Command will not be handled */
 730                 rc = -EAGAIN;
 731                 break;
 732         }
 733
 734         il_free_pages(il, cmd.reply_page);
 735
 736         return rc;
 737 }
 738
 739 static void
 740 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 741 {
 742         struct il_rx_pkt *pkt = rxb_addr(rxb);
 743         struct il_alive_resp *palive;
 744         struct delayed_work *pwork;
 745
 746         palive = &pkt->u.alive_frame;
 747
 748         D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
 749                palive->is_valid, palive->ver_type, palive->ver_subtype);
 750
 751         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 752                 D_INFO("Initialization Alive received.\n");
 753                 memcpy(&il->card_alive_init, &pkt->u.alive_frame,
 754                        sizeof(struct il_alive_resp));
 755                 pwork = &il->init_alive_start;
 756         } else {
 757                 D_INFO("Runtime Alive received.\n");
 758                 memcpy(&il->card_alive, &pkt->u.alive_frame,
 759                        sizeof(struct il_alive_resp));
 760                 pwork = &il->alive_start;
 761                 il3945_disable_events(il);
 762         }
 763
 764         /* We delay the ALIVE response by 5ms to
 765          * give the HW RF Kill time to activate... */
 766         if (palive->is_valid == UCODE_VALID_OK)
 767                 queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
 768         else
 769                 IL_WARN("uCode did not respond OK.\n");
 770 }
 771
 772 static void
 773 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 774 {
 775 #ifdef CONFIG_IWLEGACY_DEBUG
 776         struct il_rx_pkt *pkt = rxb_addr(rxb);
 777 #endif
 778
 779         D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 780 }
 781
 782 static void
 783 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 784 {
 785         struct il_rx_pkt *pkt = rxb_addr(rxb);
 786         struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 787 #ifdef CONFIG_IWLEGACY_DEBUG
 788         u8 rate = beacon->beacon_notify_hdr.rate;
 789
 790         D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
 791              le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 792              beacon->beacon_notify_hdr.failure_frame,
 793              le32_to_cpu(beacon->ibss_mgr_status),
 794              le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 795 #endif
 796
 797         il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 798
 799 }
 800
 801 /* Handle notification from uCode that card's power state is changing
 802  * due to software, hardware, or critical temperature RFKILL */
 803 static void
 804 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 805 {
 806         struct il_rx_pkt *pkt = rxb_addr(rxb);
 807         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 808         unsigned long status = il->status;
 809
 810         IL_WARN("Card state received: HW:%s SW:%s\n",
 811                 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 812                 (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 813
 814         _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 815
 816         if (flags & HW_CARD_DISABLED)
 817                 set_bit(S_RFKILL, &il->status);
 818         else
 819                 clear_bit(S_RFKILL, &il->status);
 820
 821         il_scan_cancel(il);
 822
 823         if ((test_bit(S_RFKILL, &status) !=
 824              test_bit(S_RFKILL, &il->status)))
 825                 wiphy_rfkill_set_hw_state(il->hw->wiphy,
 826                                           test_bit(S_RFKILL, &il->status));
 827         else
 828                 wake_up(&il->wait_command_queue);
 829 }
 830
 831 /**
 832  * il3945_setup_handlers - Initialize Rx handler callbacks
 833  *
 834  * Setup the RX handlers for each of the reply types sent from the uCode
 835  * to the host.
 836  *
 837  * This function chains into the hardware specific files for them to setup
 838  * any hardware specific handlers as well.
 839  */
 840 static void
 841 il3945_setup_handlers(struct il_priv *il)
 842 {
 843         il->handlers[N_ALIVE] = il3945_hdl_alive;
 844         il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
 845         il->handlers[N_ERROR] = il_hdl_error;
 846         il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
 847         il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
 848         il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
 849         il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
 850         il->handlers[N_BEACON] = il3945_hdl_beacon;
 851
 852         /*
 853          * The same handler is used for both the REPLY to a discrete
 854          * stats request from the host as well as for the periodic
 855          * stats notifications (after received beacons) from the uCode.
 856          */
 857         il->handlers[C_STATS] = il3945_hdl_c_stats;
 858         il->handlers[N_STATS] = il3945_hdl_stats;
 859
 860         il_setup_rx_scan_handlers(il);
 861         il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 862
 863         /* Set up hardware specific Rx handlers */
 864         il3945_hw_handler_setup(il);
 865 }
 866
 867 /************************** RX-FUNCTIONS ****************************/
 868 /*
 869  * Rx theory of operation
 870  *
 871  * The host allocates 32 DMA target addresses and passes the host address
 872  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
 873  * 0 to 31
 874  *
 875  * Rx Queue Indexes
 876  * The host/firmware share two idx registers for managing the Rx buffers.
 877  *
 878  * The READ idx maps to the first position that the firmware may be writing
 879  * to -- the driver can read up to (but not including) this position and get
 880  * good data.
 881  * The READ idx is managed by the firmware once the card is enabled.
 882  *
 883  * The WRITE idx maps to the last position the driver has read from -- the
 884  * position preceding WRITE is the last slot the firmware can place a packet.
 885  *
 886  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 887  * WRITE = READ.
 888  *
 889  * During initialization, the host sets up the READ queue position to the first
 890  * IDX position, and WRITE to the last (READ - 1 wrapped)
 891  *
 892  * When the firmware places a packet in a buffer, it will advance the READ idx
 893  * and fire the RX interrupt.  The driver can then query the READ idx and
 894  * process as many packets as possible, moving the WRITE idx forward as it
 895  * resets the Rx queue buffers with new memory.
 896  *
 897  * The management in the driver is as follows:
 898  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 899  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 900  *   to replenish the iwl->rxq->rx_free.
 901  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 902  *   iwl->rxq is replenished and the READ IDX is updated (updating the
 903  *   'processed' and 'read' driver idxes as well)
 904  * + A received packet is processed and handed to the kernel network stack,
 905  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
 906  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 907  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 908  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
 909  *   were enough free buffers and RX_STALLED is set it is cleared.
 910  *
 911  *
 912  * Driver sequence:
 913  *
 914  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 915  *                            il3945_rx_queue_restock
 916  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 917  *                            queue, updates firmware pointers, and updates
 918  *                            the WRITE idx.  If insufficient rx_free buffers
 919  *                            are available, schedules il3945_rx_replenish
 920  *
 921  * -- enable interrupts --
 922  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
 923  *                            READ IDX, detaching the SKB from the pool.
 924  *                            Moves the packet buffer from queue to rx_used.
 925  *                            Calls il3945_rx_queue_restock to refill any empty
 926  *                            slots.
 927  * ...
 928  *
 929  */
 930
 931 /**
 932  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 933  */
 934 static inline __le32
 935 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 936 {
 937         return cpu_to_le32((u32) dma_addr);
 938 }
 939
 940 /**
 941  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
 942  *
 943  * If there are slots in the RX queue that need to be restocked,
 944  * and we have free pre-allocated buffers, fill the ranks as much
 945  * as we can, pulling from rx_free.
 946  *
 947  * This moves the 'write' idx forward to catch up with 'processed', and
 948  * also updates the memory address in the firmware to reference the new
 949  * target buffer.
 950  */
 951 static void
 952 il3945_rx_queue_restock(struct il_priv *il)
 953 {
 954         struct il_rx_queue *rxq = &il->rxq;
 955         struct list_head *element;
 956         struct il_rx_buf *rxb;
 957         unsigned long flags;
 958         int write;
 959
 960         spin_lock_irqsave(&rxq->lock, flags);
 961         write = rxq->write & ~0x7;
 962         while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
 963                 /* Get next free Rx buffer, remove from free list */
 964                 element = rxq->rx_free.next;
 965                 rxb = list_entry(element, struct il_rx_buf, list);
 966                 list_del(element);
 967
 968                 /* Point to Rx buffer via next RBD in circular buffer */
 969                 rxq->bd[rxq->write] =
 970                     il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
 971                 rxq->queue[rxq->write] = rxb;
 972                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 973                 rxq->free_count--;
 974         }
 975         spin_unlock_irqrestore(&rxq->lock, flags);
 976         /* If the pre-allocated buffer pool is dropping low, schedule to
 977          * refill it */
 978         if (rxq->free_count <= RX_LOW_WATERMARK)
 979                 queue_work(il->workqueue, &il->rx_replenish);
 980
 981         /* If we've added more space for the firmware to place data, tell it.
 982          * Increment device's write pointer in multiples of 8. */
 983         if (rxq->write_actual != (rxq->write & ~0x7) ||
 984             abs(rxq->write - rxq->read) > 7) {
 985                 spin_lock_irqsave(&rxq->lock, flags);
 986                 rxq->need_update = 1;
 987                 spin_unlock_irqrestore(&rxq->lock, flags);
 988                 il_rx_queue_update_write_ptr(il, rxq);
 989         }
 990 }
 991
 992 /**
 993  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
 994  *
 995  * When moving to rx_free an SKB is allocated for the slot.
 996  *
 997  * Also restock the Rx queue via il3945_rx_queue_restock.
 998  * This is called as a scheduled work item (except for during initialization)
 999  */
1000 static void
1001 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
1002 {
1003         struct il_rx_queue *rxq = &il->rxq;
1004         struct list_head *element;
1005         struct il_rx_buf *rxb;
1006         struct page *page;
1007         dma_addr_t page_dma;
1008         unsigned long flags;
1009         gfp_t gfp_mask = priority;
1010
1011         while (1) {
1012                 spin_lock_irqsave(&rxq->lock, flags);
1013                 if (list_empty(&rxq->rx_used)) {
1014                         spin_unlock_irqrestore(&rxq->lock, flags);
1015                         return;
1016                 }
1017                 spin_unlock_irqrestore(&rxq->lock, flags);
1018
1019                 if (rxq->free_count > RX_LOW_WATERMARK)
1020                         gfp_mask |= __GFP_NOWARN;
1021
1022                 if (il->hw_params.rx_page_order > 0)
1023                         gfp_mask |= __GFP_COMP;
1024
1025                 /* Alloc a new receive buffer */
1026                 page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
1027                 if (!page) {
1028                         if (net_ratelimit())
1029                                 D_INFO("Failed to allocate SKB buffer.\n");
1030                         if (rxq->free_count <= RX_LOW_WATERMARK &&
1031                             net_ratelimit())
1032                                 IL_ERR("Failed to allocate SKB buffer with %0x."
1033                                        "Only %u free buffers remaining.\n",
1034                                        priority, rxq->free_count);
1035                         /* We don't reschedule replenish work here -- we will
1036                          * call the restock method and if it still needs
1037                          * more buffers it will schedule replenish */
1038                         break;
1039                 }
1040
1041                 /* Get physical address of RB/SKB */
1042                 page_dma =
1043                     pci_map_page(il->pci_dev, page, 0,
1044                                  PAGE_SIZE << il->hw_params.rx_page_order,
1045                                  PCI_DMA_FROMDEVICE);
1046
1047                 if (unlikely(pci_dma_mapping_error(il->pci_dev, page_dma))) {
1048                         __free_pages(page, il->hw_params.rx_page_order);
1049                         break;
1050                 }
1051
1052                 spin_lock_irqsave(&rxq->lock, flags);
1053
1054                 if (list_empty(&rxq->rx_used)) {
1055                         spin_unlock_irqrestore(&rxq->lock, flags);
1056                         pci_unmap_page(il->pci_dev, page_dma,
1057                                        PAGE_SIZE << il->hw_params.rx_page_order,
1058                                        PCI_DMA_FROMDEVICE);
1059                         __free_pages(page, il->hw_params.rx_page_order);
1060                         return;
1061                 }
1062
1063                 element = rxq->rx_used.next;
1064                 rxb = list_entry(element, struct il_rx_buf, list);
1065                 list_del(element);
1066
1067                 rxb->page = page;
1068                 rxb->page_dma = page_dma;
1069                 list_add_tail(&rxb->list, &rxq->rx_free);
1070                 rxq->free_count++;
1071                 il->alloc_rxb_page++;
1072
1073                 spin_unlock_irqrestore(&rxq->lock, flags);
1074         }
1075 }
1076
1077 void
1078 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
1079 {
1080         unsigned long flags;
1081         int i;
1082         spin_lock_irqsave(&rxq->lock, flags);
1083         INIT_LIST_HEAD(&rxq->rx_free);
1084         INIT_LIST_HEAD(&rxq->rx_used);
1085         /* Fill the rx_used queue with _all_ of the Rx buffers */
1086         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1087                 /* In the reset function, these buffers may have been allocated
1088                  * to an SKB, so we need to unmap and free potential storage */
1089                 if (rxq->pool[i].page != NULL) {
1090                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1091                                        PAGE_SIZE << il->hw_params.rx_page_order,
1092                                        PCI_DMA_FROMDEVICE);
1093                         __il_free_pages(il, rxq->pool[i].page);
1094                         rxq->pool[i].page = NULL;
1095                 }
1096                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1097         }
1098
1099         /* Set us so that we have processed and used all buffers, but have
1100          * not restocked the Rx queue with fresh buffers */
1101         rxq->read = rxq->write = 0;
1102         rxq->write_actual = 0;
1103         rxq->free_count = 0;
1104         spin_unlock_irqrestore(&rxq->lock, flags);
1105 }
1106
1107 void
1108 il3945_rx_replenish(void *data)
1109 {
1110         struct il_priv *il = data;
1111         unsigned long flags;
1112
1113         il3945_rx_allocate(il, GFP_KERNEL);
1114
1115         spin_lock_irqsave(&il->lock, flags);
1116         il3945_rx_queue_restock(il);
1117         spin_unlock_irqrestore(&il->lock, flags);
1118 }
1119
1120 static void
1121 il3945_rx_replenish_now(struct il_priv *il)
1122 {
1123         il3945_rx_allocate(il, GFP_ATOMIC);
1124
1125         il3945_rx_queue_restock(il);
1126 }
1127
1128 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1129  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1130  * This free routine walks the list of POOL entries and if SKB is set to
1131  * non NULL it is unmapped and freed
1132  */
1133 static void
1134 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
1135 {
1136         int i;
1137         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1138                 if (rxq->pool[i].page != NULL) {
1139                         pci_unmap_page(il->pci_dev, rxq->pool[i].page_dma,
1140                                        PAGE_SIZE << il->hw_params.rx_page_order,
1141                                        PCI_DMA_FROMDEVICE);
1142                         __il_free_pages(il, rxq->pool[i].page);
1143                         rxq->pool[i].page = NULL;
1144                 }
1145         }
1146
1147         dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1148                           rxq->bd_dma);
1149         dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
1150                           rxq->rb_stts, rxq->rb_stts_dma);
1151         rxq->bd = NULL;
1152         rxq->rb_stts = NULL;
1153 }
1154
1155 /* Convert linear signal-to-noise ratio into dB */
1156 static u8 ratio2dB[100] = {
1157 /*       0   1   2   3   4   5   6   7   8   9 */
1158         0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
1159         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1160         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1161         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1162         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1163         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1164         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1165         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1166         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1167         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1168 };
1169
1170 /* Calculates a relative dB value from a ratio of linear
1171  *   (i.e. not dB) signal levels.
1172  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1173 int
1174 il3945_calc_db_from_ratio(int sig_ratio)
1175 {
1176         /* 1000:1 or higher just report as 60 dB */
1177         if (sig_ratio >= 1000)
1178                 return 60;
1179
1180         /* 100:1 or higher, divide by 10 and use table,
1181          *   add 20 dB to make up for divide by 10 */
1182         if (sig_ratio >= 100)
1183                 return 20 + (int)ratio2dB[sig_ratio / 10];
1184
1185         /* We shouldn't see this */
1186         if (sig_ratio < 1)
1187                 return 0;
1188
1189         /* Use table for ratios 1:1 - 99:1 */
1190         return (int)ratio2dB[sig_ratio];
1191 }
1192
1193 /**
1194  * il3945_rx_handle - Main entry function for receiving responses from uCode
1195  *
1196  * Uses the il->handlers callback function array to invoke
1197  * the appropriate handlers, including command responses,
1198  * frame-received notifications, and other notifications.
1199  */
1200 static void
1201 il3945_rx_handle(struct il_priv *il)
1202 {
1203         struct il_rx_buf *rxb;
1204         struct il_rx_pkt *pkt;
1205         struct il_rx_queue *rxq = &il->rxq;
1206         u32 r, i;
1207         int reclaim;
1208         unsigned long flags;
1209         u8 fill_rx = 0;
1210         u32 count = 8;
1211         int total_empty = 0;
1212
1213         /* uCode's read idx (stored in shared DRAM) indicates the last Rx
1214          * buffer that the driver may process (last buffer filled by ucode). */
1215         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
1216         i = rxq->read;
1217
1218         /* calculate total frames need to be restock after handling RX */
1219         total_empty = r - rxq->write_actual;
1220         if (total_empty < 0)
1221                 total_empty += RX_QUEUE_SIZE;
1222
1223         if (total_empty > (RX_QUEUE_SIZE / 2))
1224                 fill_rx = 1;
1225         /* Rx interrupt, but nothing sent from uCode */
1226         if (i == r)
1227                 D_RX("r = %d, i = %d\n", r, i);
1228
1229         while (i != r) {
1230                 int len;
1231
1232                 rxb = rxq->queue[i];
1233
1234                 /* If an RXB doesn't have a Rx queue slot associated with it,
1235                  * then a bug has been introduced in the queue refilling
1236                  * routines -- catch it here */
1237                 BUG_ON(rxb == NULL);
1238
1239                 rxq->queue[i] = NULL;
1240
1241                 pci_unmap_page(il->pci_dev, rxb->page_dma,
1242                                PAGE_SIZE << il->hw_params.rx_page_order,
1243                                PCI_DMA_FROMDEVICE);
1244                 pkt = rxb_addr(rxb);
1245
1246                 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
1247                 len += sizeof(u32);     /* account for status word */
1248
1249                 /* Reclaim a command buffer only if this packet is a response
1250                  *   to a (driver-originated) command.
1251                  * If the packet (e.g. Rx frame) originated from uCode,
1252                  *   there is no command buffer to reclaim.
1253                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1254                  *   but apparently a few don't get set; catch them here. */
1255                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1256                     pkt->hdr.cmd != N_STATS && pkt->hdr.cmd != C_TX;
1257
1258                 /* Based on type of command response or notification,
1259                  *   handle those that need handling via function in
1260                  *   handlers table.  See il3945_setup_handlers() */
1261                 if (il->handlers[pkt->hdr.cmd]) {
1262                         D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
1263                              il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1264                         il->isr_stats.handlers[pkt->hdr.cmd]++;
1265                         il->handlers[pkt->hdr.cmd] (il, rxb);
1266                 } else {
1267                         /* No handling needed */
1268                         D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
1269                              i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1270                 }
1271
1272                 /*
1273                  * XXX: After here, we should always check rxb->page
1274                  * against NULL before touching it or its virtual
1275                  * memory (pkt). Because some handler might have
1276                  * already taken or freed the pages.
1277                  */
1278
1279                 if (reclaim) {
1280                         /* Invoke any callbacks, transfer the buffer to caller,
1281                          * and fire off the (possibly) blocking il_send_cmd()
1282                          * as we reclaim the driver command queue */
1283                         if (rxb->page)
1284                                 il_tx_cmd_complete(il, rxb);
1285                         else
1286                                 IL_WARN("Claim null rxb?\n");
1287                 }
1288
1289                 /* Reuse the page if possible. For notification packets and
1290                  * SKBs that fail to Rx correctly, add them back into the
1291                  * rx_free list for reuse later. */
1292                 spin_lock_irqsave(&rxq->lock, flags);
1293                 if (rxb->page != NULL) {
1294                         rxb->page_dma =
1295                             pci_map_page(il->pci_dev, rxb->page, 0,
1296                                          PAGE_SIZE << il->hw_params.
1297                                          rx_page_order, PCI_DMA_FROMDEVICE);
1298                         if (unlikely(pci_dma_mapping_error(il->pci_dev,
1299                                                            rxb->page_dma))) {
1300                                 __il_free_pages(il, rxb->page);
1301                                 rxb->page = NULL;
1302                                 list_add_tail(&rxb->list, &rxq->rx_used);
1303                         } else {
1304                                 list_add_tail(&rxb->list, &rxq->rx_free);
1305                                 rxq->free_count++;
1306                         }
1307                 } else
1308                         list_add_tail(&rxb->list, &rxq->rx_used);
1309
1310                 spin_unlock_irqrestore(&rxq->lock, flags);
1311
1312                 i = (i + 1) & RX_QUEUE_MASK;
1313                 /* If there are a lot of unused frames,
1314                  * restock the Rx queue so ucode won't assert. */
1315                 if (fill_rx) {
1316                         count++;
1317                         if (count >= 8) {
1318                                 rxq->read = i;
1319                                 il3945_rx_replenish_now(il);
1320                                 count = 0;
1321                         }
1322                 }
1323         }
1324
1325         /* Backtrack one entry */
1326         rxq->read = i;
1327         if (fill_rx)
1328                 il3945_rx_replenish_now(il);
1329         else
1330                 il3945_rx_queue_restock(il);
1331 }
1332
1333 /* call this function to flush any scheduled tasklet */
1334 static inline void
1335 il3945_synchronize_irq(struct il_priv *il)
1336 {
1337         /* wait to make sure we flush pending tasklet */
1338         synchronize_irq(il->pci_dev->irq);
1339         tasklet_kill(&il->irq_tasklet);
1340 }
1341
1342 static const char *
1343 il3945_desc_lookup(int i)
1344 {
1345         switch (i) {
1346         case 1:
1347                 return "FAIL";
1348         case 2:
1349                 return "BAD_PARAM";
1350         case 3:
1351                 return "BAD_CHECKSUM";
1352         case 4:
1353                 return "NMI_INTERRUPT";
1354         case 5:
1355                 return "SYSASSERT";
1356         case 6:
1357                 return "FATAL_ERROR";
1358         }
1359
1360         return "UNKNOWN";
1361 }
1362
1363 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1364 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1365
1366 void
1367 il3945_dump_nic_error_log(struct il_priv *il)
1368 {
1369         u32 i;
1370         u32 desc, time, count, base, data1;
1371         u32 blink1, blink2, ilink1, ilink2;
1372
1373         base = le32_to_cpu(il->card_alive.error_event_table_ptr);
1374
1375         if (!il3945_hw_valid_rtc_data_addr(base)) {
1376                 IL_ERR("Not valid error log pointer 0x%08X\n", base);
1377                 return;
1378         }
1379
1380         count = il_read_targ_mem(il, base);
1381
1382         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1383                 IL_ERR("Start IWL Error Log Dump:\n");
1384                 IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
1385         }
1386
1387         IL_ERR("Desc       Time       asrtPC  blink2 "
1388                "ilink1  nmiPC   Line\n");
1389         for (i = ERROR_START_OFFSET;
1390              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1391              i += ERROR_ELEM_SIZE) {
1392                 desc = il_read_targ_mem(il, base + i);
1393                 time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
1394                 blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
1395                 blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
1396                 ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
1397                 ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
1398                 data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
1399
1400                 IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1401                        il3945_desc_lookup(desc), desc, time, blink1, blink2,
1402                        ilink1, ilink2, data1);
1403         }
1404 }
1405
1406 static void
1407 il3945_irq_tasklet(struct il_priv *il)
1408 {
1409         u32 inta, handled = 0;
1410         u32 inta_fh;
1411         unsigned long flags;
1412 #ifdef CONFIG_IWLEGACY_DEBUG
1413         u32 inta_mask;
1414 #endif
1415
1416         spin_lock_irqsave(&il->lock, flags);
1417
1418         /* Ack/clear/reset pending uCode interrupts.
1419          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1420          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1421         inta = _il_rd(il, CSR_INT);
1422         _il_wr(il, CSR_INT, inta);
1423
1424         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1425          * Any new interrupts that happen after this, either while we're
1426          * in this tasklet, or later, will show up in next ISR/tasklet. */
1427         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1428         _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
1429
1430 #ifdef CONFIG_IWLEGACY_DEBUG
1431         if (il_get_debug_level(il) & IL_DL_ISR) {
1432                 /* just for debug */
1433                 inta_mask = _il_rd(il, CSR_INT_MASK);
1434                 D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
1435                       inta_mask, inta_fh);
1436         }
1437 #endif
1438
1439         spin_unlock_irqrestore(&il->lock, flags);
1440
1441         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1442          * atomic, make sure that inta covers all the interrupts that
1443          * we've discovered, even if FH interrupt came in just after
1444          * reading CSR_INT. */
1445         if (inta_fh & CSR39_FH_INT_RX_MASK)
1446                 inta |= CSR_INT_BIT_FH_RX;
1447         if (inta_fh & CSR39_FH_INT_TX_MASK)
1448                 inta |= CSR_INT_BIT_FH_TX;
1449
1450         /* Now service all interrupt bits discovered above. */
1451         if (inta & CSR_INT_BIT_HW_ERR) {
1452                 IL_ERR("Hardware error detected.  Restarting.\n");
1453
1454                 /* Tell the device to stop sending interrupts */
1455                 il_disable_interrupts(il);
1456
1457                 il->isr_stats.hw++;
1458                 il_irq_handle_error(il);
1459
1460                 handled |= CSR_INT_BIT_HW_ERR;
1461
1462                 return;
1463         }
1464 #ifdef CONFIG_IWLEGACY_DEBUG
1465         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1466                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1467                 if (inta & CSR_INT_BIT_SCD) {
1468                         D_ISR("Scheduler finished to transmit "
1469                               "the frame/frames.\n");
1470                         il->isr_stats.sch++;
1471                 }
1472
1473                 /* Alive notification via Rx interrupt will do the real work */
1474                 if (inta & CSR_INT_BIT_ALIVE) {
1475                         D_ISR("Alive interrupt\n");
1476                         il->isr_stats.alive++;
1477                 }
1478         }
1479 #endif
1480         /* Safely ignore these bits for debug checks below */
1481         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1482
1483         /* Error detected by uCode */
1484         if (inta & CSR_INT_BIT_SW_ERR) {
1485                 IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
1486                        inta);
1487                 il->isr_stats.sw++;
1488                 il_irq_handle_error(il);
1489                 handled |= CSR_INT_BIT_SW_ERR;
1490         }
1491
1492         /* uCode wakes up after power-down sleep */
1493         if (inta & CSR_INT_BIT_WAKEUP) {
1494                 D_ISR("Wakeup interrupt\n");
1495                 il_rx_queue_update_write_ptr(il, &il->rxq);
1496                 il_txq_update_write_ptr(il, &il->txq[0]);
1497                 il_txq_update_write_ptr(il, &il->txq[1]);
1498                 il_txq_update_write_ptr(il, &il->txq[2]);
1499                 il_txq_update_write_ptr(il, &il->txq[3]);
1500                 il_txq_update_write_ptr(il, &il->txq[4]);
1501                 il_txq_update_write_ptr(il, &il->txq[5]);
1502
1503                 il->isr_stats.wakeup++;
1504                 handled |= CSR_INT_BIT_WAKEUP;
1505         }
1506
1507         /* All uCode command responses, including Tx command responses,
1508          * Rx "responses" (frame-received notification), and other
1509          * notifications from uCode come through here*/
1510         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1511                 il3945_rx_handle(il);
1512                 il->isr_stats.rx++;
1513                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1514         }
1515
1516         if (inta & CSR_INT_BIT_FH_TX) {
1517                 D_ISR("Tx interrupt\n");
1518                 il->isr_stats.tx++;
1519
1520                 _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
1521                 il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
1522                 handled |= CSR_INT_BIT_FH_TX;
1523         }
1524
1525         if (inta & ~handled) {
1526                 IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1527                 il->isr_stats.unhandled++;
1528         }
1529
1530         if (inta & ~il->inta_mask) {
1531                 IL_WARN("Disabled INTA bits 0x%08x were pending\n",
1532                         inta & ~il->inta_mask);
1533                 IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
1534         }
1535
1536         /* Re-enable all interrupts */
1537         /* only Re-enable if disabled by irq */
1538         if (test_bit(S_INT_ENABLED, &il->status))
1539                 il_enable_interrupts(il);
1540
1541 #ifdef CONFIG_IWLEGACY_DEBUG
1542         if (il_get_debug_level(il) & (IL_DL_ISR)) {
1543                 inta = _il_rd(il, CSR_INT);
1544                 inta_mask = _il_rd(il, CSR_INT_MASK);
1545                 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
1546                 D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1547                       "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1548         }
1549 #endif
1550 }
1551
1552 static int
1553 il3945_get_channels_for_scan(struct il_priv *il, enum ieee80211_band band,
1554                              u8 is_active, u8 n_probes,
1555                              struct il3945_scan_channel *scan_ch,
1556                              struct ieee80211_vif *vif)
1557 {
1558         struct ieee80211_channel *chan;
1559         const struct ieee80211_supported_band *sband;
1560         const struct il_channel_info *ch_info;
1561         u16 passive_dwell = 0;
1562         u16 active_dwell = 0;
1563         int added, i;
1564
1565         sband = il_get_hw_mode(il, band);
1566         if (!sband)
1567                 return 0;
1568
1569         active_dwell = il_get_active_dwell_time(il, band, n_probes);
1570         passive_dwell = il_get_passive_dwell_time(il, band, vif);
1571
1572         if (passive_dwell <= active_dwell)
1573                 passive_dwell = active_dwell + 1;
1574
1575         for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
1576                 chan = il->scan_request->channels[i];
1577
1578                 if (chan->band != band)
1579                         continue;
1580
1581                 scan_ch->channel = chan->hw_value;
1582
1583                 ch_info = il_get_channel_info(il, band, scan_ch->channel);
1584                 if (!il_is_channel_valid(ch_info)) {
1585                         D_SCAN("Channel %d is INVALID for this band.\n",
1586                                scan_ch->channel);
1587                         continue;
1588                 }
1589
1590                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1591                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1592                 /* If passive , set up for auto-switch
1593                  *  and use long active_dwell time.
1594                  */
1595                 if (!is_active || il_is_channel_passive(ch_info) ||
1596                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1597                         scan_ch->type = 0;      /* passive */
1598                         if (IL_UCODE_API(il->ucode_ver) == 1)
1599                                 scan_ch->active_dwell =
1600                                     cpu_to_le16(passive_dwell - 1);
1601                 } else {
1602                         scan_ch->type = 1;      /* active */
1603                 }
1604
1605                 /* Set direct probe bits. These may be used both for active
1606                  * scan channels (probes gets sent right away),
1607                  * or for passive channels (probes get se sent only after
1608                  * hearing clear Rx packet).*/
1609                 if (IL_UCODE_API(il->ucode_ver) >= 2) {
1610                         if (n_probes)
1611                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1612                 } else {
1613                         /* uCode v1 does not allow setting direct probe bits on
1614                          * passive channel. */
1615                         if ((scan_ch->type & 1) && n_probes)
1616                                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
1617                 }
1618
1619                 /* Set txpower levels to defaults */
1620                 scan_ch->tpc.dsp_atten = 110;
1621                 /* scan_pwr_info->tpc.dsp_atten; */
1622
1623                 /*scan_pwr_info->tpc.tx_gain; */
1624                 if (band == IEEE80211_BAND_5GHZ)
1625                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1626                 else {
1627                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1628                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1629                          * power level:
1630                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1631                          */
1632                 }
1633
1634                 D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
1635                        (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1636                        (scan_ch->type & 1) ? active_dwell : passive_dwell);
1637
1638                 scan_ch++;
1639                 added++;
1640         }
1641
1642         D_SCAN("total channels to scan %d\n", added);
1643         return added;
1644 }
1645
1646 static void
1647 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
1648 {
1649         int i;
1650
1651         for (i = 0; i < RATE_COUNT_LEGACY; i++) {
1652                 rates[i].bitrate = il3945_rates[i].ieee * 5;
1653                 rates[i].hw_value = i;  /* Rate scaling will work on idxes */
1654                 rates[i].hw_value_short = i;
1655                 rates[i].flags = 0;
1656                 if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
1657                         /*
1658                          * If CCK != 1M then set short preamble rate flag.
1659                          */
1660                         rates[i].flags |=
1661                             (il3945_rates[i].plcp ==
1662                              10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1663                 }
1664         }
1665 }
1666
1667 /******************************************************************************
1668  *
1669  * uCode download functions
1670  *
1671  ******************************************************************************/
1672
1673 static void
1674 il3945_dealloc_ucode_pci(struct il_priv *il)
1675 {
1676         il_free_fw_desc(il->pci_dev, &il->ucode_code);
1677         il_free_fw_desc(il->pci_dev, &il->ucode_data);
1678         il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
1679         il_free_fw_desc(il->pci_dev, &il->ucode_init);
1680         il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
1681         il_free_fw_desc(il->pci_dev, &il->ucode_boot);
1682 }
1683
1684 /**
1685  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
1686  *     looking at all data.
1687  */
1688 static int
1689 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
1690 {
1691         u32 val;
1692         u32 save_len = len;
1693         int rc = 0;
1694         u32 errcnt;
1695
1696         D_INFO("ucode inst image size is %u\n", len);
1697
1698         il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
1699
1700         errcnt = 0;
1701         for (; len > 0; len -= sizeof(u32), image++) {
1702                 /* read data comes through single port, auto-incr addr */
1703                 /* NOTE: Use the debugless read so we don't flood kernel log
1704                  * if IL_DL_IO is set */
1705                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1706                 if (val != le32_to_cpu(*image)) {
1707                         IL_ERR("uCode INST section is invalid at "
1708                                "offset 0x%x, is 0x%x, s/b 0x%x\n",
1709                                save_len - len, val, le32_to_cpu(*image));
1710                         rc = -EIO;
1711                         errcnt++;
1712                         if (errcnt >= 20)
1713                                 break;
1714                 }
1715         }
1716
1717         if (!errcnt)
1718                 D_INFO("ucode image in INSTRUCTION memory is good\n");
1719
1720         return rc;
1721 }
1722
1723 /**
1724  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1725  *   using sample data 100 bytes apart.  If these sample points are good,
1726  *   it's a pretty good bet that everything between them is good, too.
1727  */
1728 static int
1729 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
1730 {
1731         u32 val;
1732         int rc = 0;
1733         u32 errcnt = 0;
1734         u32 i;
1735
1736         D_INFO("ucode inst image size is %u\n", len);
1737
1738         for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
1739                 /* read data comes through single port, auto-incr addr */
1740                 /* NOTE: Use the debugless read so we don't flood kernel log
1741                  * if IL_DL_IO is set */
1742                 il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
1743                 val = _il_rd(il, HBUS_TARG_MEM_RDAT);
1744                 if (val != le32_to_cpu(*image)) {
1745 #if 0                           /* Enable this if you want to see details */
1746                         IL_ERR("uCode INST section is invalid at "
1747                                "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
1748                                *image);
1749 #endif
1750                         rc = -EIO;
1751                         errcnt++;
1752                         if (errcnt >= 3)
1753                                 break;
1754                 }
1755         }
1756
1757         return rc;
1758 }
1759
1760 /**
1761  * il3945_verify_ucode - determine which instruction image is in SRAM,
1762  *    and verify its contents
1763  */
1764 static int
1765 il3945_verify_ucode(struct il_priv *il)
1766 {
1767         __le32 *image;
1768         u32 len;
1769         int rc = 0;
1770
1771         /* Try bootstrap */
1772         image = (__le32 *) il->ucode_boot.v_addr;
1773         len = il->ucode_boot.len;
1774         rc = il3945_verify_inst_sparse(il, image, len);
1775         if (rc == 0) {
1776                 D_INFO("Bootstrap uCode is good in inst SRAM\n");
1777                 return 0;
1778         }
1779
1780         /* Try initialize */
1781         image = (__le32 *) il->ucode_init.v_addr;
1782         len = il->ucode_init.len;
1783         rc = il3945_verify_inst_sparse(il, image, len);
1784         if (rc == 0) {
1785                 D_INFO("Initialize uCode is good in inst SRAM\n");
1786                 return 0;
1787         }
1788
1789         /* Try runtime/protocol */
1790         image = (__le32 *) il->ucode_code.v_addr;
1791         len = il->ucode_code.len;
1792         rc = il3945_verify_inst_sparse(il, image, len);
1793         if (rc == 0) {
1794                 D_INFO("Runtime uCode is good in inst SRAM\n");
1795                 return 0;
1796         }
1797
1798         IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1799
1800         /* Since nothing seems to match, show first several data entries in
1801          * instruction SRAM, so maybe visual inspection will give a clue.
1802          * Selection of bootstrap image (vs. other images) is arbitrary. */
1803         image = (__le32 *) il->ucode_boot.v_addr;
1804         len = il->ucode_boot.len;
1805         rc = il3945_verify_inst_full(il, image, len);
1806
1807         return rc;
1808 }
1809
1810 static void
1811 il3945_nic_start(struct il_priv *il)
1812 {
1813         /* Remove all resets to allow NIC to operate */
1814         _il_wr(il, CSR_RESET, 0);
1815 }
1816
1817 #define IL3945_UCODE_GET(item)                                          \
1818 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
1819 {                                                                       \
1820         return le32_to_cpu(ucode->v1.item);                             \
1821 }
1822
1823 static u32
1824 il3945_ucode_get_header_size(u32 api_ver)
1825 {
1826         return 24;
1827 }
1828
1829 static u8 *
1830 il3945_ucode_get_data(const struct il_ucode_header *ucode)
1831 {
1832         return (u8 *) ucode->v1.data;
1833 }
1834
1835 IL3945_UCODE_GET(inst_size);
1836 IL3945_UCODE_GET(data_size);
1837 IL3945_UCODE_GET(init_size);
1838 IL3945_UCODE_GET(init_data_size);
1839 IL3945_UCODE_GET(boot_size);
1840
1841 /**
1842  * il3945_read_ucode - Read uCode images from disk file.
1843  *
1844  * Copy into buffers for card to fetch via bus-mastering
1845  */
1846 static int
1847 il3945_read_ucode(struct il_priv *il)
1848 {
1849         const struct il_ucode_header *ucode;
1850         int ret = -EINVAL, idx;
1851         const struct firmware *ucode_raw;
1852         /* firmware file name contains uCode/driver compatibility version */
1853         const char *name_pre = il->cfg->fw_name_pre;
1854         const unsigned int api_max = il->cfg->ucode_api_max;
1855         const unsigned int api_min = il->cfg->ucode_api_min;
1856         char buf[25];
1857         u8 *src;
1858         size_t len;
1859         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1860
1861         /* Ask kernel firmware_class module to get the boot firmware off disk.
1862          * request_firmware() is synchronous, file is in memory on return. */
1863         for (idx = api_max; idx >= api_min; idx--) {
1864                 sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
1865                 ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
1866                 if (ret < 0) {
1867                         IL_ERR("%s firmware file req failed: %d\n", buf, ret);
1868                         if (ret == -ENOENT)
1869                                 continue;
1870                         else
1871                                 goto error;
1872                 } else {
1873                         if (idx < api_max)
1874                                 IL_ERR("Loaded firmware %s, "
1875                                        "which is deprecated. "
1876                                        " Please use API v%u instead.\n", buf,
1877                                        api_max);
1878                         D_INFO("Got firmware '%s' file "
1879                                "(%zd bytes) from disk\n", buf, ucode_raw->size);
1880                         break;
1881                 }
1882         }
1883
1884         if (ret < 0)
1885                 goto error;
1886
1887         /* Make sure that we got at least our header! */
1888         if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
1889                 IL_ERR("File size way too small!\n");
1890                 ret = -EINVAL;
1891                 goto err_release;
1892         }
1893
1894         /* Data from ucode file:  header followed by uCode images */
1895         ucode = (struct il_ucode_header *)ucode_raw->data;
1896
1897         il->ucode_ver = le32_to_cpu(ucode->ver);
1898         api_ver = IL_UCODE_API(il->ucode_ver);
1899         inst_size = il3945_ucode_get_inst_size(ucode);
1900         data_size = il3945_ucode_get_data_size(ucode);
1901         init_size = il3945_ucode_get_init_size(ucode);
1902         init_data_size = il3945_ucode_get_init_data_size(ucode);
1903         boot_size = il3945_ucode_get_boot_size(ucode);
1904         src = il3945_ucode_get_data(ucode);
1905
1906         /* api_ver should match the api version forming part of the
1907          * firmware filename ... but we don't check for that and only rely
1908          * on the API version read from firmware header from here on forward */
1909
1910         if (api_ver < api_min || api_ver > api_max) {
1911                 IL_ERR("Driver unable to support your firmware API. "
1912                        "Driver supports v%u, firmware is v%u.\n", api_max,
1913                        api_ver);
1914                 il->ucode_ver = 0;
1915                 ret = -EINVAL;
1916                 goto err_release;
1917         }
1918         if (api_ver != api_max)
1919                 IL_ERR("Firmware has old API version. Expected %u, "
1920                        "got %u. New firmware can be obtained "
1921                        "from http://www.intellinuxwireless.org.\n", api_max,
1922                        api_ver);
1923
1924         IL_INFO("loaded firmware version %u.%u.%u.%u\n",
1925                 IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
1926                 IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
1927
1928         snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
1929                  "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
1930                  IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
1931                  IL_UCODE_SERIAL(il->ucode_ver));
1932
1933         D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
1934         D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
1935         D_INFO("f/w package hdr runtime data size = %u\n", data_size);
1936         D_INFO("f/w package hdr init inst size = %u\n", init_size);
1937         D_INFO("f/w package hdr init data size = %u\n", init_data_size);
1938         D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
1939
1940         /* Verify size of file vs. image size info in file's header */
1941         if (ucode_raw->size !=
1942             il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
1943             init_size + init_data_size + boot_size) {
1944
1945                 D_INFO("uCode file size %zd does not match expected size\n",
1946                        ucode_raw->size);
1947                 ret = -EINVAL;
1948                 goto err_release;
1949         }
1950
1951         /* Verify that uCode images will fit in card's SRAM */
1952         if (inst_size > IL39_MAX_INST_SIZE) {
1953                 D_INFO("uCode instr len %d too large to fit in\n", inst_size);
1954                 ret = -EINVAL;
1955                 goto err_release;
1956         }
1957
1958         if (data_size > IL39_MAX_DATA_SIZE) {
1959                 D_INFO("uCode data len %d too large to fit in\n", data_size);
1960                 ret = -EINVAL;
1961                 goto err_release;
1962         }
1963         if (init_size > IL39_MAX_INST_SIZE) {
1964                 D_INFO("uCode init instr len %d too large to fit in\n",
1965                        init_size);
1966                 ret = -EINVAL;
1967                 goto err_release;
1968         }
1969         if (init_data_size > IL39_MAX_DATA_SIZE) {
1970                 D_INFO("uCode init data len %d too large to fit in\n",
1971                        init_data_size);
1972                 ret = -EINVAL;
1973                 goto err_release;
1974         }
1975         if (boot_size > IL39_MAX_BSM_SIZE) {
1976                 D_INFO("uCode boot instr len %d too large to fit in\n",
1977                        boot_size);
1978                 ret = -EINVAL;
1979                 goto err_release;
1980         }
1981
1982         /* Allocate ucode buffers for card's bus-master loading ... */
1983
1984         /* Runtime instructions and 2 copies of data:
1985          * 1) unmodified from disk
1986          * 2) backup cache for save/restore during power-downs */
1987         il->ucode_code.len = inst_size;
1988         il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
1989
1990         il->ucode_data.len = data_size;
1991         il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
1992
1993         il->ucode_data_backup.len = data_size;
1994         il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
1995
1996         if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
1997             !il->ucode_data_backup.v_addr)
1998                 goto err_pci_alloc;
1999
2000         /* Initialization instructions and data */
2001         if (init_size && init_data_size) {
2002                 il->ucode_init.len = init_size;
2003                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
2004
2005                 il->ucode_init_data.len = init_data_size;
2006                 il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
2007
2008                 if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
2009                         goto err_pci_alloc;
2010         }
2011
2012         /* Bootstrap (instructions only, no data) */
2013         if (boot_size) {
2014                 il->ucode_boot.len = boot_size;
2015                 il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
2016
2017                 if (!il->ucode_boot.v_addr)
2018                         goto err_pci_alloc;
2019         }
2020
2021         /* Copy images into buffers for card's bus-master reads ... */
2022
2023         /* Runtime instructions (first block of data in file) */
2024         len = inst_size;
2025         D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
2026         memcpy(il->ucode_code.v_addr, src, len);
2027         src += len;
2028
2029         D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2030                il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
2031
2032         /* Runtime data (2nd block)
2033          * NOTE:  Copy into backup buffer will be done in il3945_up()  */
2034         len = data_size;
2035         D_INFO("Copying (but not loading) uCode data len %zd\n", len);
2036         memcpy(il->ucode_data.v_addr, src, len);
2037         memcpy(il->ucode_data_backup.v_addr, src, len);
2038         src += len;
2039
2040         /* Initialization instructions (3rd block) */
2041         if (init_size) {
2042                 len = init_size;
2043                 D_INFO("Copying (but not loading) init instr len %zd\n", len);
2044                 memcpy(il->ucode_init.v_addr, src, len);
2045                 src += len;
2046         }
2047
2048         /* Initialization data (4th block) */
2049         if (init_data_size) {
2050                 len = init_data_size;
2051                 D_INFO("Copying (but not loading) init data len %zd\n", len);
2052                 memcpy(il->ucode_init_data.v_addr, src, len);
2053                 src += len;
2054         }
2055
2056         /* Bootstrap instructions (5th block) */
2057         len = boot_size;
2058         D_INFO("Copying (but not loading) boot instr len %zd\n", len);
2059         memcpy(il->ucode_boot.v_addr, src, len);
2060
2061         /* We have our copies now, allow OS release its copies */
2062         release_firmware(ucode_raw);
2063         return 0;
2064
2065 err_pci_alloc:
2066         IL_ERR("failed to allocate pci memory\n");
2067         ret = -ENOMEM;
2068         il3945_dealloc_ucode_pci(il);
2069
2070 err_release:
2071         release_firmware(ucode_raw);
2072
2073 error:
2074         return ret;
2075 }
2076
2077 /**
2078  * il3945_set_ucode_ptrs - Set uCode address location
2079  *
2080  * Tell initialization uCode where to find runtime uCode.
2081  *
2082  * BSM registers initially contain pointers to initialization uCode.
2083  * We need to replace them to load runtime uCode inst and data,
2084  * and to save runtime data when powering down.
2085  */
2086 static int
2087 il3945_set_ucode_ptrs(struct il_priv *il)
2088 {
2089         dma_addr_t pinst;
2090         dma_addr_t pdata;
2091
2092         /* bits 31:0 for 3945 */
2093         pinst = il->ucode_code.p_addr;
2094         pdata = il->ucode_data_backup.p_addr;
2095
2096         /* Tell bootstrap uCode where to find image to load */
2097         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2098         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2099         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
2100
2101         /* Inst byte count must be last to set up, bit 31 signals uCode
2102          *   that all new ptr/size info is in place */
2103         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
2104                    il->ucode_code.len | BSM_DRAM_INST_LOAD);
2105
2106         D_INFO("Runtime uCode pointers are set.\n");
2107
2108         return 0;
2109 }
2110
2111 /**
2112  * il3945_init_alive_start - Called after N_ALIVE notification received
2113  *
2114  * Called after N_ALIVE notification received from "initialize" uCode.
2115  *
2116  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2117  */
2118 static void
2119 il3945_init_alive_start(struct il_priv *il)
2120 {
2121         /* Check alive response for "valid" sign from uCode */
2122         if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
2123                 /* We had an error bringing up the hardware, so take it
2124                  * all the way back down so we can try again */
2125                 D_INFO("Initialize Alive failed.\n");
2126                 goto restart;
2127         }
2128
2129         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2130          * This is a paranoid check, because we would not have gotten the
2131          * "initialize" alive if code weren't properly loaded.  */
2132         if (il3945_verify_ucode(il)) {
2133                 /* Runtime instruction load was bad;
2134                  * take it all the way back down so we can try again */
2135                 D_INFO("Bad \"initialize\" uCode load.\n");
2136                 goto restart;
2137         }
2138
2139         /* Send pointers to protocol/runtime uCode image ... init code will
2140          * load and launch runtime uCode, which will send us another "Alive"
2141          * notification. */
2142         D_INFO("Initialization Alive received.\n");
2143         if (il3945_set_ucode_ptrs(il)) {
2144                 /* Runtime instruction load won't happen;
2145                  * take it all the way back down so we can try again */
2146                 D_INFO("Couldn't set up uCode pointers.\n");
2147                 goto restart;
2148         }
2149         return;
2150
2151 restart:
2152         queue_work(il->workqueue, &il->restart);
2153 }
2154
2155 /**
2156  * il3945_alive_start - called after N_ALIVE notification received
2157  *                   from protocol/runtime uCode (initialization uCode's
2158  *                   Alive gets handled by il3945_init_alive_start()).
2159  */
2160 static void
2161 il3945_alive_start(struct il_priv *il)
2162 {
2163         int thermal_spin = 0;
2164         u32 rfkill;
2165
2166         D_INFO("Runtime Alive received.\n");
2167
2168         if (il->card_alive.is_valid != UCODE_VALID_OK) {
2169                 /* We had an error bringing up the hardware, so take it
2170                  * all the way back down so we can try again */
2171                 D_INFO("Alive failed.\n");
2172                 goto restart;
2173         }
2174
2175         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2176          * This is a paranoid check, because we would not have gotten the
2177          * "runtime" alive if code weren't properly loaded.  */
2178         if (il3945_verify_ucode(il)) {
2179                 /* Runtime instruction load was bad;
2180                  * take it all the way back down so we can try again */
2181                 D_INFO("Bad runtime uCode load.\n");
2182                 goto restart;
2183         }
2184
2185         rfkill = il_rd_prph(il, APMG_RFKILL_REG);
2186         D_INFO("RFKILL status: 0x%x\n", rfkill);
2187
2188         if (rfkill & 0x1) {
2189                 clear_bit(S_RFKILL, &il->status);
2190                 /* if RFKILL is not on, then wait for thermal
2191                  * sensor in adapter to kick in */
2192                 while (il3945_hw_get_temperature(il) == 0) {
2193                         thermal_spin++;
2194                         udelay(10);
2195                 }
2196
2197                 if (thermal_spin)
2198                         D_INFO("Thermal calibration took %dus\n",
2199                                thermal_spin * 10);
2200         } else
2201                 set_bit(S_RFKILL, &il->status);
2202
2203         /* After the ALIVE response, we can send commands to 3945 uCode */
2204         set_bit(S_ALIVE, &il->status);
2205
2206         /* Enable watchdog to monitor the driver tx queues */
2207         il_setup_watchdog(il);
2208
2209         if (il_is_rfkill(il))
2210                 return;
2211
2212         ieee80211_wake_queues(il->hw);
2213
2214         il->active_rate = RATES_MASK_3945;
2215
2216         il_power_update_mode(il, true);
2217
2218         if (il_is_associated(il)) {
2219                 struct il3945_rxon_cmd *active_rxon =
2220                     (struct il3945_rxon_cmd *)(&il->active);
2221
2222                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2223                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2224         } else {
2225                 /* Initialize our rx_config data */
2226                 il_connection_init_rx_config(il);
2227         }
2228
2229         /* Configure Bluetooth device coexistence support */
2230         il_send_bt_config(il);
2231
2232         set_bit(S_READY, &il->status);
2233
2234         /* Configure the adapter for unassociated operation */
2235         il3945_commit_rxon(il);
2236
2237         il3945_reg_txpower_periodic(il);
2238
2239         D_INFO("ALIVE processing complete.\n");
2240         wake_up(&il->wait_command_queue);
2241
2242         return;
2243
2244 restart:
2245         queue_work(il->workqueue, &il->restart);
2246 }
2247
2248 static void il3945_cancel_deferred_work(struct il_priv *il);
2249
2250 static void
2251 __il3945_down(struct il_priv *il)
2252 {
2253         unsigned long flags;
2254         int exit_pending;
2255
2256         D_INFO(DRV_NAME " is going down\n");
2257
2258         il_scan_cancel_timeout(il, 200);
2259
2260         exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
2261
2262         /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
2263          * to prevent rearm timer */
2264         del_timer_sync(&il->watchdog);
2265
2266         /* Station information will now be cleared in device */
2267         il_clear_ucode_stations(il);
2268         il_dealloc_bcast_stations(il);
2269         il_clear_driver_stations(il);
2270
2271         /* Unblock any waiting calls */
2272         wake_up_all(&il->wait_command_queue);
2273
2274         /* Wipe out the EXIT_PENDING status bit if we are not actually
2275          * exiting the module */
2276         if (!exit_pending)
2277                 clear_bit(S_EXIT_PENDING, &il->status);
2278
2279         /* stop and reset the on-board processor */
2280         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2281
2282         /* tell the device to stop sending interrupts */
2283         spin_lock_irqsave(&il->lock, flags);
2284         il_disable_interrupts(il);
2285         spin_unlock_irqrestore(&il->lock, flags);
2286         il3945_synchronize_irq(il);
2287
2288         if (il->mac80211_registered)
2289                 ieee80211_stop_queues(il->hw);
2290
2291         /* If we have not previously called il3945_init() then
2292          * clear all bits but the RF Kill bits and return */
2293         if (!il_is_init(il)) {
2294                 il->status =
2295                     test_bit(S_RFKILL, &il->status) << S_RFKILL |
2296                     test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2297                     test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2298                 goto exit;
2299         }
2300
2301         /* ...otherwise clear out all the status bits but the RF Kill
2302          * bit and continue taking the NIC down. */
2303         il->status &=
2304             test_bit(S_RFKILL, &il->status) << S_RFKILL |
2305             test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
2306             test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
2307             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
2308
2309         /*
2310          * We disabled and synchronized interrupt, and priv->mutex is taken, so
2311          * here is the only thread which will program device registers, but
2312          * still have lockdep assertions, so we are taking reg_lock.
2313          */
2314         spin_lock_irq(&il->reg_lock);
2315         /* FIXME: il_grab_nic_access if rfkill is off ? */
2316
2317         il3945_hw_txq_ctx_stop(il);
2318         il3945_hw_rxq_stop(il);
2319         /* Power-down device's busmaster DMA clocks */
2320         _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2321         udelay(5);
2322         /* Stop the device, and put it in low power state */
2323         _il_apm_stop(il);
2324
2325         spin_unlock_irq(&il->reg_lock);
2326
2327         il3945_hw_txq_ctx_free(il);
2328 exit:
2329         memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
2330
2331         if (il->beacon_skb)
2332                 dev_kfree_skb(il->beacon_skb);
2333         il->beacon_skb = NULL;
2334
2335         /* clear out any free frames */
2336         il3945_clear_free_frames(il);
2337 }
2338
2339 static void
2340 il3945_down(struct il_priv *il)
2341 {
2342         mutex_lock(&il->mutex);
2343         __il3945_down(il);
2344         mutex_unlock(&il->mutex);
2345
2346         il3945_cancel_deferred_work(il);
2347 }
2348
2349 #define MAX_HW_RESTARTS 5
2350
2351 static int
2352 il3945_alloc_bcast_station(struct il_priv *il)
2353 {
2354         unsigned long flags;
2355         u8 sta_id;
2356
2357         spin_lock_irqsave(&il->sta_lock, flags);
2358         sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
2359         if (sta_id == IL_INVALID_STATION) {
2360                 IL_ERR("Unable to prepare broadcast station\n");
2361                 spin_unlock_irqrestore(&il->sta_lock, flags);
2362
2363                 return -EINVAL;
2364         }
2365
2366         il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
2367         il->stations[sta_id].used |= IL_STA_BCAST;
2368         spin_unlock_irqrestore(&il->sta_lock, flags);
2369
2370         return 0;
2371 }
2372
2373 static int
2374 __il3945_up(struct il_priv *il)
2375 {
2376         int rc, i;
2377
2378         rc = il3945_alloc_bcast_station(il);
2379         if (rc)
2380                 return rc;
2381
2382         if (test_bit(S_EXIT_PENDING, &il->status)) {
2383                 IL_WARN("Exit pending; will not bring the NIC up\n");
2384                 return -EIO;
2385         }
2386
2387         if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
2388                 IL_ERR("ucode not available for device bring up\n");
2389                 return -EIO;
2390         }
2391
2392         /* If platform's RF_KILL switch is NOT set to KILL */
2393         if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2394                 clear_bit(S_RFKILL, &il->status);
2395         else {
2396                 set_bit(S_RFKILL, &il->status);
2397                 IL_WARN("Radio disabled by HW RF Kill switch\n");
2398                 return -ENODEV;
2399         }
2400
2401         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2402
2403         rc = il3945_hw_nic_init(il);
2404         if (rc) {
2405                 IL_ERR("Unable to int nic\n");
2406                 return rc;
2407         }
2408
2409         /* make sure rfkill handshake bits are cleared */
2410         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2411         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2412
2413         /* clear (again), then enable host interrupts */
2414         _il_wr(il, CSR_INT, 0xFFFFFFFF);
2415         il_enable_interrupts(il);
2416
2417         /* really make sure rfkill handshake bits are cleared */
2418         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2419         _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2420
2421         /* Copy original ucode data image from disk into backup cache.
2422          * This will be used to initialize the on-board processor's
2423          * data SRAM for a clean start when the runtime program first loads. */
2424         memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
2425                il->ucode_data.len);
2426
2427         /* We return success when we resume from suspend and rf_kill is on. */
2428         if (test_bit(S_RFKILL, &il->status))
2429                 return 0;
2430
2431         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2432
2433                 /* load bootstrap state machine,
2434                  * load bootstrap program into processor's memory,
2435                  * prepare to load the "initialize" uCode */
2436                 rc = il->ops->load_ucode(il);
2437
2438                 if (rc) {
2439                         IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
2440                         continue;
2441                 }
2442
2443                 /* start card; "initialize" will load runtime ucode */
2444                 il3945_nic_start(il);
2445
2446                 D_INFO(DRV_NAME " is coming up\n");
2447
2448                 return 0;
2449         }
2450
2451         set_bit(S_EXIT_PENDING, &il->status);
2452         __il3945_down(il);
2453         clear_bit(S_EXIT_PENDING, &il->status);
2454
2455         /* tried to restart and config the device for as long as our
2456          * patience could withstand */
2457         IL_ERR("Unable to initialize device after %d attempts.\n", i);
2458         return -EIO;
2459 }
2460
2461 /*****************************************************************************
2462  *
2463  * Workqueue callbacks
2464  *
2465  *****************************************************************************/
2466
2467 static void
2468 il3945_bg_init_alive_start(struct work_struct *data)
2469 {
2470         struct il_priv *il =
2471             container_of(data, struct il_priv, init_alive_start.work);
2472
2473         mutex_lock(&il->mutex);
2474         if (test_bit(S_EXIT_PENDING, &il->status))
2475                 goto out;
2476
2477         il3945_init_alive_start(il);
2478 out:
2479         mutex_unlock(&il->mutex);
2480 }
2481
2482 static void
2483 il3945_bg_alive_start(struct work_struct *data)
2484 {
2485         struct il_priv *il =
2486             container_of(data, struct il_priv, alive_start.work);
2487
2488         mutex_lock(&il->mutex);
2489         if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
2490                 goto out;
2491
2492         il3945_alive_start(il);
2493 out:
2494         mutex_unlock(&il->mutex);
2495 }
2496
2497 /*
2498  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2499  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2500  * *is* readable even when device has been SW_RESET into low power mode
2501  * (e.g. during RF KILL).
2502  */
2503 static void
2504 il3945_rfkill_poll(struct work_struct *data)
2505 {
2506         struct il_priv *il =
2507             container_of(data, struct il_priv, _3945.rfkill_poll.work);
2508         bool old_rfkill = test_bit(S_RFKILL, &il->status);
2509         bool new_rfkill =
2510             !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2511
2512         if (new_rfkill != old_rfkill) {
2513                 if (new_rfkill)
2514                         set_bit(S_RFKILL, &il->status);
2515                 else
2516                         clear_bit(S_RFKILL, &il->status);
2517
2518                 wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
2519
2520                 D_RF_KILL("RF_KILL bit toggled to %s.\n",
2521                           new_rfkill ? "disable radio" : "enable radio");
2522         }
2523
2524         /* Keep this running, even if radio now enabled.  This will be
2525          * cancelled in mac_start() if system decides to start again */
2526         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2527                            round_jiffies_relative(2 * HZ));
2528
2529 }
2530
2531 int
2532 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
2533 {
2534         struct il_host_cmd cmd = {
2535                 .id = C_SCAN,
2536                 .len = sizeof(struct il3945_scan_cmd),
2537                 .flags = CMD_SIZE_HUGE,
2538         };
2539         struct il3945_scan_cmd *scan;
2540         u8 n_probes = 0;
2541         enum ieee80211_band band;
2542         bool is_active = false;
2543         int ret;
2544         u16 len;
2545
2546         lockdep_assert_held(&il->mutex);
2547
2548         if (!il->scan_cmd) {
2549                 il->scan_cmd =
2550                     kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
2551                             GFP_KERNEL);
2552                 if (!il->scan_cmd) {
2553                         D_SCAN("Fail to allocate scan memory\n");
2554                         return -ENOMEM;
2555                 }
2556         }
2557         scan = il->scan_cmd;
2558         memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
2559
2560         scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
2561         scan->quiet_time = IL_ACTIVE_QUIET_TIME;
2562
2563         if (il_is_associated(il)) {
2564                 u16 interval;
2565                 u32 extra;
2566                 u32 suspend_time = 100;
2567                 u32 scan_suspend_time = 100;
2568
2569                 D_INFO("Scanning while associated...\n");
2570
2571                 interval = vif->bss_conf.beacon_int;
2572
2573                 scan->suspend_time = 0;
2574                 scan->max_out_time = cpu_to_le32(200 * 1024);
2575                 if (!interval)
2576                         interval = suspend_time;
2577                 /*
2578                  * suspend time format:
2579                  *  0-19: beacon interval in usec (time before exec.)
2580                  * 20-23: 0
2581                  * 24-31: number of beacons (suspend between channels)
2582                  */
2583
2584                 extra = (suspend_time / interval) << 24;
2585                 scan_suspend_time =
2586                     0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
2587
2588                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2589                 D_SCAN("suspend_time 0x%X beacon interval %d\n",
2590                        scan_suspend_time, interval);
2591         }
2592
2593         if (il->scan_request->n_ssids) {
2594                 int i, p = 0;
2595                 D_SCAN("Kicking off active scan\n");
2596                 for (i = 0; i < il->scan_request->n_ssids; i++) {
2597                         /* always does wildcard anyway */
2598                         if (!il->scan_request->ssids[i].ssid_len)
2599                                 continue;
2600                         scan->direct_scan[p].id = WLAN_EID_SSID;
2601                         scan->direct_scan[p].len =
2602                             il->scan_request->ssids[i].ssid_len;
2603                         memcpy(scan->direct_scan[p].ssid,
2604                                il->scan_request->ssids[i].ssid,
2605                                il->scan_request->ssids[i].ssid_len);
2606                         n_probes++;
2607                         p++;
2608                 }
2609                 is_active = true;
2610         } else
2611                 D_SCAN("Kicking off passive scan.\n");
2612
2613         /* We don't build a direct scan probe request; the uCode will do
2614          * that based on the direct_mask added to each channel entry */
2615         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2616         scan->tx_cmd.sta_id = il->hw_params.bcast_id;
2617         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2618
2619         /* flags + rate selection */
2620
2621         switch (il->scan_band) {
2622         case IEEE80211_BAND_2GHZ:
2623                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2624                 scan->tx_cmd.rate = RATE_1M_PLCP;
2625                 band = IEEE80211_BAND_2GHZ;
2626                 break;
2627         case IEEE80211_BAND_5GHZ:
2628                 scan->tx_cmd.rate = RATE_6M_PLCP;
2629                 band = IEEE80211_BAND_5GHZ;
2630                 break;
2631         default:
2632                 IL_WARN("Invalid scan band\n");
2633                 return -EIO;
2634         }
2635
2636         /*
2637          * If active scaning is requested but a certain channel is marked
2638          * passive, we can do active scanning if we detect transmissions. For
2639          * passive only scanning disable switching to active on any channel.
2640          */
2641         scan->good_CRC_th =
2642             is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
2643
2644         len =
2645             il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
2646                               vif->addr, il->scan_request->ie,
2647                               il->scan_request->ie_len,
2648                               IL_MAX_SCAN_SIZE - sizeof(*scan));
2649         scan->tx_cmd.len = cpu_to_le16(len);
2650
2651         /* select Rx antennas */
2652         scan->flags |= il3945_get_antenna_flags(il);
2653
2654         scan->channel_count =
2655             il3945_get_channels_for_scan(il, band, is_active, n_probes,
2656                                          (void *)&scan->data[len], vif);
2657         if (scan->channel_count == 0) {
2658                 D_SCAN("channel count %d\n", scan->channel_count);
2659                 return -EIO;
2660         }
2661
2662         cmd.len +=
2663             le16_to_cpu(scan->tx_cmd.len) +
2664             scan->channel_count * sizeof(struct il3945_scan_channel);
2665         cmd.data = scan;
2666         scan->len = cpu_to_le16(cmd.len);
2667
2668         set_bit(S_SCAN_HW, &il->status);
2669         ret = il_send_cmd_sync(il, &cmd);
2670         if (ret)
2671                 clear_bit(S_SCAN_HW, &il->status);
2672         return ret;
2673 }
2674
2675 void
2676 il3945_post_scan(struct il_priv *il)
2677 {
2678         /*
2679          * Since setting the RXON may have been deferred while
2680          * performing the scan, fire one off if needed
2681          */
2682         if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
2683                 il3945_commit_rxon(il);
2684 }
2685
2686 static void
2687 il3945_bg_restart(struct work_struct *data)
2688 {
2689         struct il_priv *il = container_of(data, struct il_priv, restart);
2690
2691         if (test_bit(S_EXIT_PENDING, &il->status))
2692                 return;
2693
2694         if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
2695                 mutex_lock(&il->mutex);
2696                 il->is_open = 0;
2697                 mutex_unlock(&il->mutex);
2698                 il3945_down(il);
2699                 ieee80211_restart_hw(il->hw);
2700         } else {
2701                 il3945_down(il);
2702
2703                 mutex_lock(&il->mutex);
2704                 if (test_bit(S_EXIT_PENDING, &il->status)) {
2705                         mutex_unlock(&il->mutex);
2706                         return;
2707                 }
2708
2709                 __il3945_up(il);
2710                 mutex_unlock(&il->mutex);
2711         }
2712 }
2713
2714 static void
2715 il3945_bg_rx_replenish(struct work_struct *data)
2716 {
2717         struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
2718
2719         mutex_lock(&il->mutex);
2720         if (test_bit(S_EXIT_PENDING, &il->status))
2721                 goto out;
2722
2723         il3945_rx_replenish(il);
2724 out:
2725         mutex_unlock(&il->mutex);
2726 }
2727
2728 void
2729 il3945_post_associate(struct il_priv *il)
2730 {
2731         int rc = 0;
2732         struct ieee80211_conf *conf = NULL;
2733
2734         if (!il->vif || !il->is_open)
2735                 return;
2736
2737         D_ASSOC("Associated as %d to: %pM\n", il->vif->bss_conf.aid,
2738                 il->active.bssid_addr);
2739
2740         if (test_bit(S_EXIT_PENDING, &il->status))
2741                 return;
2742
2743         il_scan_cancel_timeout(il, 200);
2744
2745         conf = &il->hw->conf;
2746
2747         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2748         il3945_commit_rxon(il);
2749
2750         rc = il_send_rxon_timing(il);
2751         if (rc)
2752                 IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
2753
2754         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2755
2756         il->staging.assoc_id = cpu_to_le16(il->vif->bss_conf.aid);
2757
2758         D_ASSOC("assoc id %d beacon interval %d\n", il->vif->bss_conf.aid,
2759                 il->vif->bss_conf.beacon_int);
2760
2761         if (il->vif->bss_conf.use_short_preamble)
2762                 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2763         else
2764                 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2765
2766         if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2767                 if (il->vif->bss_conf.use_short_slot)
2768                         il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2769                 else
2770                         il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2771         }
2772
2773         il3945_commit_rxon(il);
2774
2775         switch (il->vif->type) {
2776         case NL80211_IFTYPE_STATION:
2777                 il3945_rate_scale_init(il->hw, IL_AP_ID);
2778                 break;
2779         case NL80211_IFTYPE_ADHOC:
2780                 il3945_send_beacon_cmd(il);
2781                 break;
2782         default:
2783                 IL_ERR("%s Should not be called in %d mode\n", __func__,
2784                       il->vif->type);
2785                 break;
2786         }
2787 }
2788
2789 /*****************************************************************************
2790  *
2791  * mac80211 entry point functions
2792  *
2793  *****************************************************************************/
2794
2795 #define UCODE_READY_TIMEOUT     (2 * HZ)
2796
2797 static int
2798 il3945_mac_start(struct ieee80211_hw *hw)
2799 {
2800         struct il_priv *il = hw->priv;
2801         int ret;
2802
2803         /* we should be verifying the device is ready to be opened */
2804         mutex_lock(&il->mutex);
2805         D_MAC80211("enter\n");
2806
2807         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2808          * ucode filename and max sizes are card-specific. */
2809
2810         if (!il->ucode_code.len) {
2811                 ret = il3945_read_ucode(il);
2812                 if (ret) {
2813                         IL_ERR("Could not read microcode: %d\n", ret);
2814                         mutex_unlock(&il->mutex);
2815                         goto out_release_irq;
2816                 }
2817         }
2818
2819         ret = __il3945_up(il);
2820
2821         mutex_unlock(&il->mutex);
2822
2823         if (ret)
2824                 goto out_release_irq;
2825
2826         D_INFO("Start UP work.\n");
2827
2828         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
2829          * mac80211 will not be run successfully. */
2830         ret = wait_event_timeout(il->wait_command_queue,
2831                                  test_bit(S_READY, &il->status),
2832                                  UCODE_READY_TIMEOUT);
2833         if (!ret) {
2834                 if (!test_bit(S_READY, &il->status)) {
2835                         IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
2836                                jiffies_to_msecs(UCODE_READY_TIMEOUT));
2837                         ret = -ETIMEDOUT;
2838                         goto out_release_irq;
2839                 }
2840         }
2841
2842         /* ucode is running and will send rfkill notifications,
2843          * no need to poll the killswitch state anymore */
2844         cancel_delayed_work(&il->_3945.rfkill_poll);
2845
2846         il->is_open = 1;
2847         D_MAC80211("leave\n");
2848         return 0;
2849
2850 out_release_irq:
2851         il->is_open = 0;
2852         D_MAC80211("leave - failed\n");
2853         return ret;
2854 }
2855
2856 static void
2857 il3945_mac_stop(struct ieee80211_hw *hw)
2858 {
2859         struct il_priv *il = hw->priv;
2860
2861         D_MAC80211("enter\n");
2862
2863         if (!il->is_open) {
2864                 D_MAC80211("leave - skip\n");
2865                 return;
2866         }
2867
2868         il->is_open = 0;
2869
2870         il3945_down(il);
2871
2872         flush_workqueue(il->workqueue);
2873
2874         /* start polling the killswitch state again */
2875         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
2876                            round_jiffies_relative(2 * HZ));
2877
2878         D_MAC80211("leave\n");
2879 }
2880
2881 static void
2882 il3945_mac_tx(struct ieee80211_hw *hw,
2883                struct ieee80211_tx_control *control,
2884                struct sk_buff *skb)
2885 {
2886         struct il_priv *il = hw->priv;
2887
2888         D_MAC80211("enter\n");
2889
2890         D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2891              ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2892
2893         if (il3945_tx_skb(il, control->sta, skb))
2894                 dev_kfree_skb_any(skb);
2895
2896         D_MAC80211("leave\n");
2897 }
2898
2899 void
2900 il3945_config_ap(struct il_priv *il)
2901 {
2902         struct ieee80211_vif *vif = il->vif;
2903         int rc = 0;
2904
2905         if (test_bit(S_EXIT_PENDING, &il->status))
2906                 return;
2907
2908         /* The following should be done only at AP bring up */
2909         if (!(il_is_associated(il))) {
2910
2911                 /* RXON - unassoc (to set timing command) */
2912                 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2913                 il3945_commit_rxon(il);
2914
2915                 /* RXON Timing */
2916                 rc = il_send_rxon_timing(il);
2917                 if (rc)
2918                         IL_WARN("C_RXON_TIMING failed - "
2919                                 "Attempting to continue.\n");
2920
2921                 il->staging.assoc_id = 0;
2922
2923                 if (vif->bss_conf.use_short_preamble)
2924                         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2925                 else
2926                         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2927
2928                 if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
2929                         if (vif->bss_conf.use_short_slot)
2930                                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
2931                         else
2932                                 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2933                 }
2934                 /* restore RXON assoc */
2935                 il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2936                 il3945_commit_rxon(il);
2937         }
2938         il3945_send_beacon_cmd(il);
2939 }
2940
2941 static int
2942 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2943                    struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2944                    struct ieee80211_key_conf *key)
2945 {
2946         struct il_priv *il = hw->priv;
2947         int ret = 0;
2948         u8 sta_id = IL_INVALID_STATION;
2949         u8 static_key;
2950
2951         D_MAC80211("enter\n");
2952
2953         if (il3945_mod_params.sw_crypto) {
2954                 D_MAC80211("leave - hwcrypto disabled\n");
2955                 return -EOPNOTSUPP;
2956         }
2957
2958         /*
2959          * To support IBSS RSN, don't program group keys in IBSS, the
2960          * hardware will then not attempt to decrypt the frames.
2961          */
2962         if (vif->type == NL80211_IFTYPE_ADHOC &&
2963             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
2964                 D_MAC80211("leave - IBSS RSN\n");
2965                 return -EOPNOTSUPP;
2966         }
2967
2968         static_key = !il_is_associated(il);
2969
2970         if (!static_key) {
2971                 sta_id = il_sta_id_or_broadcast(il, sta);
2972                 if (sta_id == IL_INVALID_STATION) {
2973                         D_MAC80211("leave - station not found\n");
2974                         return -EINVAL;
2975                 }
2976         }
2977
2978         mutex_lock(&il->mutex);
2979         il_scan_cancel_timeout(il, 100);
2980
2981         switch (cmd) {
2982         case SET_KEY:
2983                 if (static_key)
2984                         ret = il3945_set_static_key(il, key);
2985                 else
2986                         ret = il3945_set_dynamic_key(il, key, sta_id);
2987                 D_MAC80211("enable hwcrypto key\n");
2988                 break;
2989         case DISABLE_KEY:
2990                 if (static_key)
2991                         ret = il3945_remove_static_key(il);
2992                 else
2993                         ret = il3945_clear_sta_key_info(il, sta_id);
2994                 D_MAC80211("disable hwcrypto key\n");
2995                 break;
2996         default:
2997                 ret = -EINVAL;
2998         }
2999
3000         D_MAC80211("leave ret %d\n", ret);
3001         mutex_unlock(&il->mutex);
3002
3003         return ret;
3004 }
3005
3006 static int
3007 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3008                    struct ieee80211_sta *sta)
3009 {
3010         struct il_priv *il = hw->priv;
3011         struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3012         int ret;
3013         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3014         u8 sta_id;
3015
3016         mutex_lock(&il->mutex);
3017         D_INFO("station %pM\n", sta->addr);
3018         sta_priv->common.sta_id = IL_INVALID_STATION;
3019
3020         ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
3021         if (ret) {
3022                 IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
3023                 /* Should we return success if return code is EEXIST ? */
3024                 mutex_unlock(&il->mutex);
3025                 return ret;
3026         }
3027
3028         sta_priv->common.sta_id = sta_id;
3029
3030         /* Initialize rate scaling */
3031         D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
3032         il3945_rs_rate_init(il, sta, sta_id);
3033         mutex_unlock(&il->mutex);
3034
3035         return 0;
3036 }
3037
3038 static void
3039 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
3040                         unsigned int *total_flags, u64 multicast)
3041 {
3042         struct il_priv *il = hw->priv;
3043         __le32 filter_or = 0, filter_nand = 0;
3044
3045 #define CHK(test, flag) do { \
3046         if (*total_flags & (test))              \
3047                 filter_or |= (flag);            \
3048         else                                    \
3049                 filter_nand |= (flag);          \
3050         } while (0)
3051
3052         D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
3053                    *total_flags);
3054
3055         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3056         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3057         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3058
3059 #undef CHK
3060
3061         mutex_lock(&il->mutex);
3062
3063         il->staging.filter_flags &= ~filter_nand;
3064         il->staging.filter_flags |= filter_or;
3065
3066         /*
3067          * Not committing directly because hardware can perform a scan,
3068          * but even if hw is ready, committing here breaks for some reason,
3069          * we'll eventually commit the filter flags change anyway.
3070          */
3071
3072         mutex_unlock(&il->mutex);
3073
3074         /*
3075          * Receiving all multicast frames is always enabled by the
3076          * default flags setup in il_connection_init_rx_config()
3077          * since we currently do not support programming multicast
3078          * filters into the device.
3079          */
3080         *total_flags &=
3081             FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3082             FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3083 }
3084
3085 /*****************************************************************************
3086  *
3087  * sysfs attributes
3088  *
3089  *****************************************************************************/
3090
3091 #ifdef CONFIG_IWLEGACY_DEBUG
3092
3093 /*
3094  * The following adds a new attribute to the sysfs representation
3095  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3096  * used for controlling the debug level.
3097  *
3098  * See the level definitions in iwl for details.
3099  *
3100  * The debug_level being managed using sysfs below is a per device debug
3101  * level that is used instead of the global debug level if it (the per
3102  * device debug level) is set.
3103  */
3104 static ssize_t
3105 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
3106                         char *buf)
3107 {
3108         struct il_priv *il = dev_get_drvdata(d);
3109         return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
3110 }
3111
3112 static ssize_t
3113 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
3114                          const char *buf, size_t count)
3115 {
3116         struct il_priv *il = dev_get_drvdata(d);
3117         unsigned long val;
3118         int ret;
3119
3120         ret = strict_strtoul(buf, 0, &val);
3121         if (ret)
3122                 IL_INFO("%s is not in hex or decimal form.\n", buf);
3123         else
3124                 il->debug_level = val;
3125
3126         return strnlen(buf, count);
3127 }
3128
3129 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, il3945_show_debug_level,
3130                    il3945_store_debug_level);
3131
3132 #endif /* CONFIG_IWLEGACY_DEBUG */
3133
3134 static ssize_t
3135 il3945_show_temperature(struct device *d, struct device_attribute *attr,
3136                         char *buf)
3137 {
3138         struct il_priv *il = dev_get_drvdata(d);
3139
3140         if (!il_is_alive(il))
3141                 return -EAGAIN;
3142
3143         return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
3144 }
3145
3146 static DEVICE_ATTR(temperature, S_IRUGO, il3945_show_temperature, NULL);
3147
3148 static ssize_t
3149 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
3150 {
3151         struct il_priv *il = dev_get_drvdata(d);
3152         return sprintf(buf, "%d\n", il->tx_power_user_lmt);
3153 }
3154
3155 static ssize_t
3156 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
3157                       const char *buf, size_t count)
3158 {
3159         struct il_priv *il = dev_get_drvdata(d);
3160         char *p = (char *)buf;
3161         u32 val;
3162
3163         val = simple_strtoul(p, &p, 10);
3164         if (p == buf)
3165                 IL_INFO(": %s is not in decimal form.\n", buf);
3166         else
3167                 il3945_hw_reg_set_txpower(il, val);
3168
3169         return count;
3170 }
3171
3172 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, il3945_show_tx_power,
3173                    il3945_store_tx_power);
3174
3175 static ssize_t
3176 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
3177 {
3178         struct il_priv *il = dev_get_drvdata(d);
3179
3180         return sprintf(buf, "0x%04X\n", il->active.flags);
3181 }
3182
3183 static ssize_t
3184 il3945_store_flags(struct device *d, struct device_attribute *attr,
3185                    const char *buf, size_t count)
3186 {
3187         struct il_priv *il = dev_get_drvdata(d);
3188         u32 flags = simple_strtoul(buf, NULL, 0);
3189
3190         mutex_lock(&il->mutex);
3191         if (le32_to_cpu(il->staging.flags) != flags) {
3192                 /* Cancel any currently running scans... */
3193                 if (il_scan_cancel_timeout(il, 100))
3194                         IL_WARN("Could not cancel scan.\n");
3195                 else {
3196                         D_INFO("Committing rxon.flags = 0x%04X\n", flags);
3197                         il->staging.flags = cpu_to_le32(flags);
3198                         il3945_commit_rxon(il);
3199                 }
3200         }
3201         mutex_unlock(&il->mutex);
3202
3203         return count;
3204 }
3205
3206 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, il3945_show_flags,
3207                    il3945_store_flags);
3208
3209 static ssize_t
3210 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
3211                          char *buf)
3212 {
3213         struct il_priv *il = dev_get_drvdata(d);
3214
3215         return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
3216 }
3217
3218 static ssize_t
3219 il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
3220                           const char *buf, size_t count)
3221 {
3222         struct il_priv *il = dev_get_drvdata(d);
3223         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3224
3225         mutex_lock(&il->mutex);
3226         if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
3227                 /* Cancel any currently running scans... */
3228                 if (il_scan_cancel_timeout(il, 100))
3229                         IL_WARN("Could not cancel scan.\n");
3230                 else {
3231                         D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
3232                                filter_flags);
3233                         il->staging.filter_flags = cpu_to_le32(filter_flags);
3234                         il3945_commit_rxon(il);
3235                 }
3236         }
3237         mutex_unlock(&il->mutex);
3238
3239         return count;
3240 }
3241
3242 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, il3945_show_filter_flags,
3243                    il3945_store_filter_flags);
3244
3245 static ssize_t
3246 il3945_show_measurement(struct device *d, struct device_attribute *attr,
3247                         char *buf)
3248 {
3249         struct il_priv *il = dev_get_drvdata(d);
3250         struct il_spectrum_notification measure_report;
3251         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3252         u8 *data = (u8 *) &measure_report;
3253         unsigned long flags;
3254
3255         spin_lock_irqsave(&il->lock, flags);
3256         if (!(il->measurement_status & MEASUREMENT_READY)) {
3257                 spin_unlock_irqrestore(&il->lock, flags);
3258                 return 0;
3259         }
3260         memcpy(&measure_report, &il->measure_report, size);
3261         il->measurement_status = 0;
3262         spin_unlock_irqrestore(&il->lock, flags);
3263
3264         while (size && PAGE_SIZE - len) {
3265                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3266                                    PAGE_SIZE - len, 1);
3267                 len = strlen(buf);
3268                 if (PAGE_SIZE - len)
3269                         buf[len++] = '\n';
3270
3271                 ofs += 16;
3272                 size -= min(size, 16U);
3273         }
3274
3275         return len;
3276 }
3277
3278 static ssize_t
3279 il3945_store_measurement(struct device *d, struct device_attribute *attr,
3280                          const char *buf, size_t count)
3281 {
3282         struct il_priv *il = dev_get_drvdata(d);
3283         struct ieee80211_measurement_params params = {
3284                 .channel = le16_to_cpu(il->active.channel),
3285                 .start_time = cpu_to_le64(il->_3945.last_tsf),
3286                 .duration = cpu_to_le16(1),
3287         };
3288         u8 type = IL_MEASURE_BASIC;
3289         u8 buffer[32];
3290         u8 channel;
3291
3292         if (count) {
3293                 char *p = buffer;
3294                 strlcpy(buffer, buf, sizeof(buffer));
3295                 channel = simple_strtoul(p, NULL, 0);
3296                 if (channel)
3297                         params.channel = channel;
3298
3299                 p = buffer;
3300                 while (*p && *p != ' ')
3301                         p++;
3302                 if (*p)
3303                         type = simple_strtoul(p + 1, NULL, 0);
3304         }
3305
3306         D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
3307                type, params.channel, buf);
3308         il3945_get_measurement(il, &params, type);
3309
3310         return count;
3311 }
3312
3313 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, il3945_show_measurement,
3314                    il3945_store_measurement);
3315
3316 static ssize_t
3317 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
3318                         const char *buf, size_t count)
3319 {
3320         struct il_priv *il = dev_get_drvdata(d);
3321
3322         il->retry_rate = simple_strtoul(buf, NULL, 0);
3323         if (il->retry_rate <= 0)
3324                 il->retry_rate = 1;
3325
3326         return count;
3327 }
3328
3329 static ssize_t
3330 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
3331                        char *buf)
3332 {
3333         struct il_priv *il = dev_get_drvdata(d);
3334         return sprintf(buf, "%d", il->retry_rate);
3335 }
3336
3337 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, il3945_show_retry_rate,
3338                    il3945_store_retry_rate);
3339
3340 static ssize_t
3341 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
3342 {
3343         /* all this shit doesn't belong into sysfs anyway */
3344         return 0;
3345 }
3346
3347 static DEVICE_ATTR(channels, S_IRUSR, il3945_show_channels, NULL);
3348
3349 static ssize_t
3350 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
3351 {
3352         struct il_priv *il = dev_get_drvdata(d);
3353
3354         if (!il_is_alive(il))
3355                 return -EAGAIN;
3356
3357         return sprintf(buf, "%d\n", il3945_mod_params.antenna);
3358 }
3359
3360 static ssize_t
3361 il3945_store_antenna(struct device *d, struct device_attribute *attr,
3362                      const char *buf, size_t count)
3363 {
3364         struct il_priv *il __maybe_unused = dev_get_drvdata(d);
3365         int ant;
3366
3367         if (count == 0)
3368                 return 0;
3369
3370         if (sscanf(buf, "%1i", &ant) != 1) {
3371                 D_INFO("not in hex or decimal form.\n");
3372                 return count;
3373         }
3374
3375         if (ant >= 0 && ant <= 2) {
3376                 D_INFO("Setting antenna select to %d.\n", ant);
3377                 il3945_mod_params.antenna = (enum il3945_antenna)ant;
3378         } else
3379                 D_INFO("Bad antenna select value %d.\n", ant);
3380
3381         return count;
3382 }
3383
3384 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, il3945_show_antenna,
3385                    il3945_store_antenna);
3386
3387 static ssize_t
3388 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
3389 {
3390         struct il_priv *il = dev_get_drvdata(d);
3391         if (!il_is_alive(il))
3392                 return -EAGAIN;
3393         return sprintf(buf, "0x%08x\n", (int)il->status);
3394 }
3395
3396 static DEVICE_ATTR(status, S_IRUGO, il3945_show_status, NULL);
3397
3398 static ssize_t
3399 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
3400                       const char *buf, size_t count)
3401 {
3402         struct il_priv *il = dev_get_drvdata(d);
3403         char *p = (char *)buf;
3404
3405         if (p[0] == '1')
3406                 il3945_dump_nic_error_log(il);
3407
3408         return strnlen(buf, count);
3409 }
3410
3411 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, il3945_dump_error_log);
3412
3413 /*****************************************************************************
3414  *
3415  * driver setup and tear down
3416  *
3417  *****************************************************************************/
3418
3419 static void
3420 il3945_setup_deferred_work(struct il_priv *il)
3421 {
3422         il->workqueue = create_singlethread_workqueue(DRV_NAME);
3423
3424         init_waitqueue_head(&il->wait_command_queue);
3425
3426         INIT_WORK(&il->restart, il3945_bg_restart);
3427         INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
3428         INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
3429         INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
3430         INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
3431
3432         il_setup_scan_deferred_work(il);
3433
3434         il3945_hw_setup_deferred_work(il);
3435
3436         init_timer(&il->watchdog);
3437         il->watchdog.data = (unsigned long)il;
3438         il->watchdog.function = il_bg_watchdog;
3439
3440         tasklet_init(&il->irq_tasklet,
3441                      (void (*)(unsigned long))il3945_irq_tasklet,
3442                      (unsigned long)il);
3443 }
3444
3445 static void
3446 il3945_cancel_deferred_work(struct il_priv *il)
3447 {
3448         il3945_hw_cancel_deferred_work(il);
3449
3450         cancel_delayed_work_sync(&il->init_alive_start);
3451         cancel_delayed_work(&il->alive_start);
3452
3453         il_cancel_scan_deferred_work(il);
3454 }
3455
3456 static struct attribute *il3945_sysfs_entries[] = {
3457         &dev_attr_antenna.attr,
3458         &dev_attr_channels.attr,
3459         &dev_attr_dump_errors.attr,
3460         &dev_attr_flags.attr,
3461         &dev_attr_filter_flags.attr,
3462         &dev_attr_measurement.attr,
3463         &dev_attr_retry_rate.attr,
3464         &dev_attr_status.attr,
3465         &dev_attr_temperature.attr,
3466         &dev_attr_tx_power.attr,
3467 #ifdef CONFIG_IWLEGACY_DEBUG
3468         &dev_attr_debug_level.attr,
3469 #endif
3470         NULL
3471 };
3472
3473 static struct attribute_group il3945_attribute_group = {
3474         .name = NULL,           /* put in device directory */
3475         .attrs = il3945_sysfs_entries,
3476 };
3477
3478 struct ieee80211_ops il3945_mac_ops = {
3479         .tx = il3945_mac_tx,
3480         .start = il3945_mac_start,
3481         .stop = il3945_mac_stop,
3482         .add_interface = il_mac_add_interface,
3483         .remove_interface = il_mac_remove_interface,
3484         .change_interface = il_mac_change_interface,
3485         .config = il_mac_config,
3486         .configure_filter = il3945_configure_filter,
3487         .set_key = il3945_mac_set_key,
3488         .conf_tx = il_mac_conf_tx,
3489         .reset_tsf = il_mac_reset_tsf,
3490         .bss_info_changed = il_mac_bss_info_changed,
3491         .hw_scan = il_mac_hw_scan,
3492         .sta_add = il3945_mac_sta_add,
3493         .sta_remove = il_mac_sta_remove,
3494         .tx_last_beacon = il_mac_tx_last_beacon,
3495         .flush = il_mac_flush,
3496 };
3497
3498 static int
3499 il3945_init_drv(struct il_priv *il)
3500 {
3501         int ret;
3502         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
3503
3504         il->retry_rate = 1;
3505         il->beacon_skb = NULL;
3506
3507         spin_lock_init(&il->sta_lock);
3508         spin_lock_init(&il->hcmd_lock);
3509
3510         INIT_LIST_HEAD(&il->free_frames);
3511
3512         mutex_init(&il->mutex);
3513
3514         il->ieee_channels = NULL;
3515         il->ieee_rates = NULL;
3516         il->band = IEEE80211_BAND_2GHZ;
3517
3518         il->iw_mode = NL80211_IFTYPE_STATION;
3519         il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
3520
3521         /* initialize force reset */
3522         il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
3523
3524         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3525                 IL_WARN("Unsupported EEPROM version: 0x%04X\n",
3526                         eeprom->version);
3527                 ret = -EINVAL;
3528                 goto err;
3529         }
3530         ret = il_init_channel_map(il);
3531         if (ret) {
3532                 IL_ERR("initializing regulatory failed: %d\n", ret);
3533                 goto err;
3534         }
3535
3536         /* Set up txpower settings in driver for all channels */
3537         if (il3945_txpower_set_from_eeprom(il)) {
3538                 ret = -EIO;
3539                 goto err_free_channel_map;
3540         }
3541
3542         ret = il_init_geos(il);
3543         if (ret) {
3544                 IL_ERR("initializing geos failed: %d\n", ret);
3545                 goto err_free_channel_map;
3546         }
3547         il3945_init_hw_rates(il, il->ieee_rates);
3548
3549         return 0;
3550
3551 err_free_channel_map:
3552         il_free_channel_map(il);
3553 err:
3554         return ret;
3555 }
3556
3557 #define IL3945_MAX_PROBE_REQUEST        200
3558
3559 static int
3560 il3945_setup_mac(struct il_priv *il)
3561 {
3562         int ret;
3563         struct ieee80211_hw *hw = il->hw;
3564
3565         hw->rate_control_algorithm = "iwl-3945-rs";
3566         hw->sta_data_size = sizeof(struct il3945_sta_priv);
3567         hw->vif_data_size = sizeof(struct il_vif_priv);
3568
3569         /* Tell mac80211 our characteristics */
3570         hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_SPECTRUM_MGMT |
3571                     IEEE80211_HW_SUPPORTS_PS | IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3572
3573         hw->wiphy->interface_modes =
3574             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
3575
3576         hw->wiphy->flags |=
3577             WIPHY_FLAG_CUSTOM_REGULATORY | WIPHY_FLAG_DISABLE_BEACON_HINTS |
3578             WIPHY_FLAG_IBSS_RSN;
3579
3580         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
3581
3582         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3583         /* we create the 802.11 header and a zero-length SSID element */
3584         hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
3585
3586         /* Default value; 4 EDCA QOS priorities */
3587         hw->queues = 4;
3588
3589         if (il->bands[IEEE80211_BAND_2GHZ].n_channels)
3590                 il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3591                     &il->bands[IEEE80211_BAND_2GHZ];
3592
3593         if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
3594                 il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3595                     &il->bands[IEEE80211_BAND_5GHZ];
3596
3597         il_leds_init(il);
3598
3599         ret = ieee80211_register_hw(il->hw);
3600         if (ret) {
3601                 IL_ERR("Failed to register hw (error %d)\n", ret);
3602                 return ret;
3603         }
3604         il->mac80211_registered = 1;
3605
3606         return 0;
3607 }
3608
3609 static int
3610 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3611 {
3612         int err = 0;
3613         struct il_priv *il;
3614         struct ieee80211_hw *hw;
3615         struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
3616         struct il3945_eeprom *eeprom;
3617         unsigned long flags;
3618
3619         /***********************
3620          * 1. Allocating HW data
3621          * ********************/
3622
3623         hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
3624         if (!hw) {
3625                 err = -ENOMEM;
3626                 goto out;
3627         }
3628         il = hw->priv;
3629         il->hw = hw;
3630         SET_IEEE80211_DEV(hw, &pdev->dev);
3631
3632         il->cmd_queue = IL39_CMD_QUEUE_NUM;
3633
3634         /*
3635          * Disabling hardware scan means that mac80211 will perform scans
3636          * "the hard way", rather than using device's scan.
3637          */
3638         if (il3945_mod_params.disable_hw_scan) {
3639                 D_INFO("Disabling hw_scan\n");
3640                 il3945_mac_ops.hw_scan = NULL;
3641         }
3642
3643         D_INFO("*** LOAD DRIVER ***\n");
3644         il->cfg = cfg;
3645         il->ops = &il3945_ops;
3646 #ifdef CONFIG_IWLEGACY_DEBUGFS
3647         il->debugfs_ops = &il3945_debugfs_ops;
3648 #endif
3649         il->pci_dev = pdev;
3650         il->inta_mask = CSR_INI_SET_MASK;
3651
3652         /***************************
3653          * 2. Initializing PCI bus
3654          * *************************/
3655         pci_disable_link_state(pdev,
3656                                PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3657                                PCIE_LINK_STATE_CLKPM);
3658
3659         if (pci_enable_device(pdev)) {
3660                 err = -ENODEV;
3661                 goto out_ieee80211_free_hw;
3662         }
3663
3664         pci_set_master(pdev);
3665
3666         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3667         if (!err)
3668                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3669         if (err) {
3670                 IL_WARN("No suitable DMA available.\n");
3671                 goto out_pci_disable_device;
3672         }
3673
3674         pci_set_drvdata(pdev, il);
3675         err = pci_request_regions(pdev, DRV_NAME);
3676         if (err)
3677                 goto out_pci_disable_device;
3678
3679         /***********************
3680          * 3. Read REV Register
3681          * ********************/
3682         il->hw_base = pci_ioremap_bar(pdev, 0);
3683         if (!il->hw_base) {
3684                 err = -ENODEV;
3685                 goto out_pci_release_regions;
3686         }
3687
3688         D_INFO("pci_resource_len = 0x%08llx\n",
3689                (unsigned long long)pci_resource_len(pdev, 0));
3690         D_INFO("pci_resource_base = %p\n", il->hw_base);
3691
3692         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3693          * PCI Tx retries from interfering with C3 CPU state */
3694         pci_write_config_byte(pdev, 0x41, 0x00);
3695
3696         /* these spin locks will be used in apm_init and EEPROM access
3697          * we should init now
3698          */
3699         spin_lock_init(&il->reg_lock);
3700         spin_lock_init(&il->lock);
3701
3702         /*
3703          * stop and reset the on-board processor just in case it is in a
3704          * strange state ... like being left stranded by a primary kernel
3705          * and this is now the kdump kernel trying to start up
3706          */
3707         _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3708
3709         /***********************
3710          * 4. Read EEPROM
3711          * ********************/
3712
3713         /* Read the EEPROM */
3714         err = il_eeprom_init(il);
3715         if (err) {
3716                 IL_ERR("Unable to init EEPROM\n");
3717                 goto out_iounmap;
3718         }
3719         /* MAC Address location in EEPROM same for 3945/4965 */
3720         eeprom = (struct il3945_eeprom *)il->eeprom;
3721         D_INFO("MAC address: %pM\n", eeprom->mac_address);
3722         SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
3723
3724         /***********************
3725          * 5. Setup HW Constants
3726          * ********************/
3727         /* Device-specific setup */
3728         if (il3945_hw_set_hw_params(il)) {
3729                 IL_ERR("failed to set hw settings\n");
3730                 goto out_eeprom_free;
3731         }
3732
3733         /***********************
3734          * 6. Setup il
3735          * ********************/
3736
3737         err = il3945_init_drv(il);
3738         if (err) {
3739                 IL_ERR("initializing driver failed\n");
3740                 goto out_unset_hw_params;
3741         }
3742
3743         IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
3744
3745         /***********************
3746          * 7. Setup Services
3747          * ********************/
3748
3749         spin_lock_irqsave(&il->lock, flags);
3750         il_disable_interrupts(il);
3751         spin_unlock_irqrestore(&il->lock, flags);
3752
3753         pci_enable_msi(il->pci_dev);
3754
3755         err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
3756         if (err) {
3757                 IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
3758                 goto out_disable_msi;
3759         }
3760
3761         err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
3762         if (err) {
3763                 IL_ERR("failed to create sysfs device attributes\n");
3764                 goto out_release_irq;
3765         }
3766
3767         il_set_rxon_channel(il, &il->bands[IEEE80211_BAND_2GHZ].channels[5]);
3768         il3945_setup_deferred_work(il);
3769         il3945_setup_handlers(il);
3770         il_power_initialize(il);
3771
3772         /*********************************
3773          * 8. Setup and Register mac80211
3774          * *******************************/
3775
3776         il_enable_interrupts(il);
3777
3778         err = il3945_setup_mac(il);
3779         if (err)
3780                 goto out_remove_sysfs;
3781
3782         err = il_dbgfs_register(il, DRV_NAME);
3783         if (err)
3784                 IL_ERR("failed to create debugfs files. Ignoring error: %d\n",
3785                        err);
3786
3787         /* Start monitoring the killswitch */
3788         queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
3789
3790         return 0;
3791
3792 out_remove_sysfs:
3793         destroy_workqueue(il->workqueue);
3794         il->workqueue = NULL;
3795         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3796 out_release_irq:
3797         free_irq(il->pci_dev->irq, il);
3798 out_disable_msi:
3799         pci_disable_msi(il->pci_dev);
3800         il_free_geos(il);
3801         il_free_channel_map(il);
3802 out_unset_hw_params:
3803         il3945_unset_hw_params(il);
3804 out_eeprom_free:
3805         il_eeprom_free(il);
3806 out_iounmap:
3807         iounmap(il->hw_base);
3808 out_pci_release_regions:
3809         pci_release_regions(pdev);
3810 out_pci_disable_device:
3811         pci_set_drvdata(pdev, NULL);
3812         pci_disable_device(pdev);
3813 out_ieee80211_free_hw:
3814         ieee80211_free_hw(il->hw);
3815 out:
3816         return err;
3817 }
3818
3819 static void
3820 il3945_pci_remove(struct pci_dev *pdev)
3821 {
3822         struct il_priv *il = pci_get_drvdata(pdev);
3823         unsigned long flags;
3824
3825         if (!il)
3826                 return;
3827
3828         D_INFO("*** UNLOAD DRIVER ***\n");
3829
3830         il_dbgfs_unregister(il);
3831
3832         set_bit(S_EXIT_PENDING, &il->status);
3833
3834         il_leds_exit(il);
3835
3836         if (il->mac80211_registered) {
3837                 ieee80211_unregister_hw(il->hw);
3838                 il->mac80211_registered = 0;
3839         } else {
3840                 il3945_down(il);
3841         }
3842
3843         /*
3844          * Make sure device is reset to low power before unloading driver.
3845          * This may be redundant with il_down(), but there are paths to
3846          * run il_down() without calling apm_ops.stop(), and there are
3847          * paths to avoid running il_down() at all before leaving driver.
3848          * This (inexpensive) call *makes sure* device is reset.
3849          */
3850         il_apm_stop(il);
3851
3852         /* make sure we flush any pending irq or
3853          * tasklet for the driver
3854          */
3855         spin_lock_irqsave(&il->lock, flags);
3856         il_disable_interrupts(il);
3857         spin_unlock_irqrestore(&il->lock, flags);
3858
3859         il3945_synchronize_irq(il);
3860
3861         sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
3862
3863         cancel_delayed_work_sync(&il->_3945.rfkill_poll);
3864
3865         il3945_dealloc_ucode_pci(il);
3866
3867         if (il->rxq.bd)
3868                 il3945_rx_queue_free(il, &il->rxq);
3869         il3945_hw_txq_ctx_free(il);
3870
3871         il3945_unset_hw_params(il);
3872
3873         /*netif_stop_queue(dev); */
3874         flush_workqueue(il->workqueue);
3875
3876         /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
3877          * il->workqueue... so we can't take down the workqueue
3878          * until now... */
3879         destroy_workqueue(il->workqueue);
3880         il->workqueue = NULL;
3881
3882         free_irq(pdev->irq, il);
3883         pci_disable_msi(pdev);
3884
3885         iounmap(il->hw_base);
3886         pci_release_regions(pdev);
3887         pci_disable_device(pdev);
3888         pci_set_drvdata(pdev, NULL);
3889
3890         il_free_channel_map(il);
3891         il_free_geos(il);
3892         kfree(il->scan_cmd);
3893         if (il->beacon_skb)
3894                 dev_kfree_skb(il->beacon_skb);
3895
3896         ieee80211_free_hw(il->hw);
3897 }
3898
3899 /*****************************************************************************
3900  *
3901  * driver and module entry point
3902  *
3903  *****************************************************************************/
3904
3905 static struct pci_driver il3945_driver = {
3906         .name = DRV_NAME,
3907         .id_table = il3945_hw_card_ids,
3908         .probe = il3945_pci_probe,
3909         .remove = il3945_pci_remove,
3910         .driver.pm = IL_LEGACY_PM_OPS,
3911 };
3912
3913 static int __init
3914 il3945_init(void)
3915 {
3916
3917         int ret;
3918         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3919         pr_info(DRV_COPYRIGHT "\n");
3920
3921         ret = il3945_rate_control_register();
3922         if (ret) {
3923                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3924                 return ret;
3925         }
3926
3927         ret = pci_register_driver(&il3945_driver);
3928         if (ret) {
3929                 pr_err("Unable to initialize PCI module\n");
3930                 goto error_register;
3931         }
3932
3933         return ret;
3934
3935 error_register:
3936         il3945_rate_control_unregister();
3937         return ret;
3938 }
3939
3940 static void __exit
3941 il3945_exit(void)
3942 {
3943         pci_unregister_driver(&il3945_driver);
3944         il3945_rate_control_unregister();
3945 }
3946
3947 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
3948
3949 module_param_named(antenna, il3945_mod_params.antenna, int, S_IRUGO);
3950 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3951 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, S_IRUGO);
3952 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
3953 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
3954                    S_IRUGO);
3955 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
3956 #ifdef CONFIG_IWLEGACY_DEBUG
3957 module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
3958 MODULE_PARM_DESC(debug, "debug output mask");
3959 #endif
3960 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, S_IRUGO);
3961 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3962
3963 module_exit(il3945_exit);
3964 module_init(il3945_init);